Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/scsi/megaraid/megaraid_sas_base.c

  1 /*
  2  *  Linux MegaRAID driver for SAS based RAID controllers
  3  *
  4  *  Copyright (c) 2003-2013  LSI Corporation
  5  *  Copyright (c) 2013-2014  Avago Technologies
  6  *
  7  *  This program is free software; you can redistribute it and/or
  8  *  modify it under the terms of the GNU General Public License
  9  *  as published by the Free Software Foundation; either version 2
 10  *  of the License, or (at your option) any later version.
 11  *
 12  *  This program is distributed in the hope that it will be useful,
 13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  *  GNU General Public License for more details.
 16  *
 17  *  You should have received a copy of the GNU General Public License
 18  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 19  *
 20  *  Authors: Avago Technologies
 21  *           Sreenivas Bagalkote
 22  *           Sumant Patro
 23  *           Bo Yang
 24  *           Adam Radford
 25  *           Kashyap Desai <kashyap.desai@avagotech.com>
 26  *           Sumit Saxena <sumit.saxena@avagotech.com>
 27  *
 28  *  Send feedback to: megaraidlinux.pdl@avagotech.com
 29  *
 30  *  Mail to: Avago Technologies, 350 West Trimble Road, Building 90,
 31  *  San Jose, California 95131
 32  */
 33 
 34 #include <linux/kernel.h>
 35 #include <linux/types.h>
 36 #include <linux/pci.h>
 37 #include <linux/list.h>
 38 #include <linux/moduleparam.h>
 39 #include <linux/module.h>
 40 #include <linux/spinlock.h>
 41 #include <linux/interrupt.h>
 42 #include <linux/delay.h>
 43 #include <linux/uio.h>
 44 #include <linux/slab.h>
 45 #include <asm/uaccess.h>
 46 #include <linux/fs.h>
 47 #include <linux/compat.h>
 48 #include <linux/blkdev.h>
 49 #include <linux/mutex.h>
 50 #include <linux/poll.h>
 51 
 52 #include <scsi/scsi.h>
 53 #include <scsi/scsi_cmnd.h>
 54 #include <scsi/scsi_device.h>
 55 #include <scsi/scsi_host.h>
 56 #include <scsi/scsi_tcq.h>
 57 #include "megaraid_sas_fusion.h"
 58 #include "megaraid_sas.h"
 59 
 60 /*
 61  * Number of sectors per IO command
 62  * Will be set in megasas_init_mfi if user does not provide
 63  */
 64 static unsigned int max_sectors;
 65 module_param_named(max_sectors, max_sectors, int, 0);
 66 MODULE_PARM_DESC(max_sectors,
 67         "Maximum number of sectors per IO command");
 68 
 69 static int msix_disable;
 70 module_param(msix_disable, int, S_IRUGO);
 71 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
 72 
 73 static unsigned int msix_vectors;
 74 module_param(msix_vectors, int, S_IRUGO);
 75 MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW");
 76 
 77 static int allow_vf_ioctls;
 78 module_param(allow_vf_ioctls, int, S_IRUGO);
 79 MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0");
 80 
 81 static unsigned int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
 82 module_param(throttlequeuedepth, int, S_IRUGO);
 83 MODULE_PARM_DESC(throttlequeuedepth,
 84         "Adapter queue depth when throttled due to I/O timeout. Default: 16");
 85 
 86 int resetwaittime = MEGASAS_RESET_WAIT_TIME;
 87 module_param(resetwaittime, int, S_IRUGO);
 88 MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
 89                  "before resetting adapter. Default: 180");
 90 
 91 int smp_affinity_enable = 1;
 92 module_param(smp_affinity_enable, int, S_IRUGO);
 93 MODULE_PARM_DESC(smp_affinity_enable, "SMP affinity feature enable/disbale Default: enable(1)");
 94 
 95 MODULE_LICENSE("GPL");
 96 MODULE_VERSION(MEGASAS_VERSION);
 97 MODULE_AUTHOR("megaraidlinux@lsi.com");
 98 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
 99 
100 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
101 static int megasas_get_pd_list(struct megasas_instance *instance);
102 static int megasas_ld_list_query(struct megasas_instance *instance,
103                                  u8 query_type);
104 static int megasas_issue_init_mfi(struct megasas_instance *instance);
105 static int megasas_register_aen(struct megasas_instance *instance,
106                                 u32 seq_num, u32 class_locale_word);
107 /*
108  * PCI ID table for all supported controllers
109  */
110 static struct pci_device_id megasas_pci_table[] = {
111 
112         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
113         /* xscale IOP */
114         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
115         /* ppc IOP */
116         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
117         /* ppc IOP */
118         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
119         /* gen2*/
120         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
121         /* gen2*/
122         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
123         /* skinny*/
124         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
125         /* skinny*/
126         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
127         /* xscale IOP, vega */
128         {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
129         /* xscale IOP */
130         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
131         /* Fusion */
132         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
133         /* Plasma */
134         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
135         /* Invader */
136         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FURY)},
137         /* Fury */
138         {}
139 };
140 
141 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
142 
143 static int megasas_mgmt_majorno;
144 struct megasas_mgmt_info megasas_mgmt_info;
145 static struct fasync_struct *megasas_async_queue;
146 static DEFINE_MUTEX(megasas_async_queue_mutex);
147 
148 static int megasas_poll_wait_aen;
149 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
150 static u32 support_poll_for_event;
151 u32 megasas_dbg_lvl;
152 static u32 support_device_change;
153 
154 /* define lock for aen poll */
155 spinlock_t poll_aen_lock;
156 
157 void
158 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
159                      u8 alt_status);
160 static u32
161 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
162 static int
163 megasas_adp_reset_gen2(struct megasas_instance *instance,
164                        struct megasas_register_set __iomem *reg_set);
165 static irqreturn_t megasas_isr(int irq, void *devp);
166 static u32
167 megasas_init_adapter_mfi(struct megasas_instance *instance);
168 u32
169 megasas_build_and_issue_cmd(struct megasas_instance *instance,
170                             struct scsi_cmnd *scmd);
171 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
172 void
173 megasas_release_fusion(struct megasas_instance *instance);
174 int
175 megasas_ioc_init_fusion(struct megasas_instance *instance);
176 void
177 megasas_free_cmds_fusion(struct megasas_instance *instance);
178 u8
179 megasas_get_map_info(struct megasas_instance *instance);
180 int
181 megasas_sync_map_info(struct megasas_instance *instance);
182 int
183 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
184         int seconds);
185 void megasas_reset_reply_desc(struct megasas_instance *instance);
186 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout);
187 void megasas_fusion_ocr_wq(struct work_struct *work);
188 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
189                                          int initial);
190 int megasas_check_mpio_paths(struct megasas_instance *instance,
191                              struct scsi_cmnd *scmd);
192 
193 void
194 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
195 {
196         instance->instancet->fire_cmd(instance,
197                 cmd->frame_phys_addr, 0, instance->reg_set);
198 }
199 
200 /**
201  * megasas_get_cmd -    Get a command from the free pool
202  * @instance:           Adapter soft state
203  *
204  * Returns a free command from the pool
205  */
206 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
207                                                   *instance)
208 {
209         unsigned long flags;
210         struct megasas_cmd *cmd = NULL;
211 
212         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
213 
214         if (!list_empty(&instance->cmd_pool)) {
215                 cmd = list_entry((&instance->cmd_pool)->next,
216                                  struct megasas_cmd, list);
217                 list_del_init(&cmd->list);
218                 atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_DETACHED);
219         } else {
220                 printk(KERN_ERR "megasas: Command pool empty!\n");
221         }
222 
223         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
224         return cmd;
225 }
226 
227 /**
228  * __megasas_return_cmd -       Return a cmd to free command pool
229  * @instance:           Adapter soft state
230  * @cmd:                Command packet to be returned to free command pool
231  */
232 inline void
233 __megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
234 {
235         /*
236          * Don't go ahead and free the MFI frame, if corresponding
237          * MPT frame is not freed(valid for only fusion adapters).
238          * In case of MFI adapters, anyways for any allocated MFI
239          * frame will have cmd->mfi_mpt_mpthr set to MFI_MPT_DETACHED
240          */
241         if (atomic_read(&cmd->mfi_mpt_pthr) != MFI_MPT_DETACHED)
242                 return;
243 
244         cmd->scmd = NULL;
245         cmd->frame_count = 0;
246         cmd->is_wait_event = 0;
247         cmd->mpt_pthr_cmd_blocked = NULL;
248 
249         if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
250             (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
251             (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
252             (reset_devices))
253                 cmd->frame->hdr.cmd = MFI_CMD_INVALID;
254 
255         atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
256         list_add(&cmd->list, (&instance->cmd_pool)->next);
257 }
258 
259 /**
260  * megasas_return_cmd - Return a cmd to free command pool
261  * @instance:           Adapter soft state
262  * @cmd:                Command packet to be returned to free command pool
263  */
264 inline void
265 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
266 {
267         unsigned long flags;
268 
269         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
270         __megasas_return_cmd(instance, cmd);
271         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
272 }
273 
274 
275 /**
276 *       The following functions are defined for xscale
277 *       (deviceid : 1064R, PERC5) controllers
278 */
279 
280 /**
281  * megasas_enable_intr_xscale - Enables interrupts
282  * @regs:                       MFI register set
283  */
284 static inline void
285 megasas_enable_intr_xscale(struct megasas_instance *instance)
286 {
287         struct megasas_register_set __iomem *regs;
288         regs = instance->reg_set;
289         writel(0, &(regs)->outbound_intr_mask);
290 
291         /* Dummy readl to force pci flush */
292         readl(&regs->outbound_intr_mask);
293 }
294 
295 /**
296  * megasas_disable_intr_xscale -Disables interrupt
297  * @regs:                       MFI register set
298  */
299 static inline void
300 megasas_disable_intr_xscale(struct megasas_instance *instance)
301 {
302         struct megasas_register_set __iomem *regs;
303         u32 mask = 0x1f;
304         regs = instance->reg_set;
305         writel(mask, &regs->outbound_intr_mask);
306         /* Dummy readl to force pci flush */
307         readl(&regs->outbound_intr_mask);
308 }
309 
310 /**
311  * megasas_read_fw_status_reg_xscale - returns the current FW status value
312  * @regs:                       MFI register set
313  */
314 static u32
315 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
316 {
317         return readl(&(regs)->outbound_msg_0);
318 }
319 /**
320  * megasas_clear_interrupt_xscale -     Check & clear interrupt
321  * @regs:                               MFI register set
322  */
323 static int
324 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
325 {
326         u32 status;
327         u32 mfiStatus = 0;
328         /*
329          * Check if it is our interrupt
330          */
331         status = readl(&regs->outbound_intr_status);
332 
333         if (status & MFI_OB_INTR_STATUS_MASK)
334                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
335         if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
336                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
337 
338         /*
339          * Clear the interrupt by writing back the same value
340          */
341         if (mfiStatus)
342                 writel(status, &regs->outbound_intr_status);
343 
344         /* Dummy readl to force pci flush */
345         readl(&regs->outbound_intr_status);
346 
347         return mfiStatus;
348 }
349 
350 /**
351  * megasas_fire_cmd_xscale -    Sends command to the FW
352  * @frame_phys_addr :           Physical address of cmd
353  * @frame_count :               Number of frames for the command
354  * @regs :                      MFI register set
355  */
356 static inline void
357 megasas_fire_cmd_xscale(struct megasas_instance *instance,
358                 dma_addr_t frame_phys_addr,
359                 u32 frame_count,
360                 struct megasas_register_set __iomem *regs)
361 {
362         unsigned long flags;
363         spin_lock_irqsave(&instance->hba_lock, flags);
364         writel((frame_phys_addr >> 3)|(frame_count),
365                &(regs)->inbound_queue_port);
366         spin_unlock_irqrestore(&instance->hba_lock, flags);
367 }
368 
369 /**
370  * megasas_adp_reset_xscale -  For controller reset
371  * @regs:                              MFI register set
372  */
373 static int
374 megasas_adp_reset_xscale(struct megasas_instance *instance,
375         struct megasas_register_set __iomem *regs)
376 {
377         u32 i;
378         u32 pcidata;
379         writel(MFI_ADP_RESET, &regs->inbound_doorbell);
380 
381         for (i = 0; i < 3; i++)
382                 msleep(1000); /* sleep for 3 secs */
383         pcidata  = 0;
384         pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
385         printk(KERN_NOTICE "pcidata = %x\n", pcidata);
386         if (pcidata & 0x2) {
387                 printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
388                 pcidata &= ~0x2;
389                 pci_write_config_dword(instance->pdev,
390                                 MFI_1068_PCSR_OFFSET, pcidata);
391 
392                 for (i = 0; i < 2; i++)
393                         msleep(1000); /* need to wait 2 secs again */
394 
395                 pcidata  = 0;
396                 pci_read_config_dword(instance->pdev,
397                                 MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
398                 printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
399                 if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
400                         printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
401                         pcidata = 0;
402                         pci_write_config_dword(instance->pdev,
403                                 MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
404                 }
405         }
406         return 0;
407 }
408 
409 /**
410  * megasas_check_reset_xscale - For controller reset check
411  * @regs:                               MFI register set
412  */
413 static int
414 megasas_check_reset_xscale(struct megasas_instance *instance,
415                 struct megasas_register_set __iomem *regs)
416 {
417 
418         if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
419             (le32_to_cpu(*instance->consumer) ==
420                 MEGASAS_ADPRESET_INPROG_SIGN))
421                 return 1;
422         return 0;
423 }
424 
425 static struct megasas_instance_template megasas_instance_template_xscale = {
426 
427         .fire_cmd = megasas_fire_cmd_xscale,
428         .enable_intr = megasas_enable_intr_xscale,
429         .disable_intr = megasas_disable_intr_xscale,
430         .clear_intr = megasas_clear_intr_xscale,
431         .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
432         .adp_reset = megasas_adp_reset_xscale,
433         .check_reset = megasas_check_reset_xscale,
434         .service_isr = megasas_isr,
435         .tasklet = megasas_complete_cmd_dpc,
436         .init_adapter = megasas_init_adapter_mfi,
437         .build_and_issue_cmd = megasas_build_and_issue_cmd,
438         .issue_dcmd = megasas_issue_dcmd,
439 };
440 
441 /**
442 *       This is the end of set of functions & definitions specific
443 *       to xscale (deviceid : 1064R, PERC5) controllers
444 */
445 
446 /**
447 *       The following functions are defined for ppc (deviceid : 0x60)
448 *       controllers
449 */
450 
451 /**
452  * megasas_enable_intr_ppc -    Enables interrupts
453  * @regs:                       MFI register set
454  */
455 static inline void
456 megasas_enable_intr_ppc(struct megasas_instance *instance)
457 {
458         struct megasas_register_set __iomem *regs;
459         regs = instance->reg_set;
460         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
461 
462         writel(~0x80000000, &(regs)->outbound_intr_mask);
463 
464         /* Dummy readl to force pci flush */
465         readl(&regs->outbound_intr_mask);
466 }
467 
468 /**
469  * megasas_disable_intr_ppc -   Disable interrupt
470  * @regs:                       MFI register set
471  */
472 static inline void
473 megasas_disable_intr_ppc(struct megasas_instance *instance)
474 {
475         struct megasas_register_set __iomem *regs;
476         u32 mask = 0xFFFFFFFF;
477         regs = instance->reg_set;
478         writel(mask, &regs->outbound_intr_mask);
479         /* Dummy readl to force pci flush */
480         readl(&regs->outbound_intr_mask);
481 }
482 
483 /**
484  * megasas_read_fw_status_reg_ppc - returns the current FW status value
485  * @regs:                       MFI register set
486  */
487 static u32
488 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
489 {
490         return readl(&(regs)->outbound_scratch_pad);
491 }
492 
493 /**
494  * megasas_clear_interrupt_ppc -        Check & clear interrupt
495  * @regs:                               MFI register set
496  */
497 static int
498 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
499 {
500         u32 status, mfiStatus = 0;
501 
502         /*
503          * Check if it is our interrupt
504          */
505         status = readl(&regs->outbound_intr_status);
506 
507         if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
508                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
509 
510         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
511                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
512 
513         /*
514          * Clear the interrupt by writing back the same value
515          */
516         writel(status, &regs->outbound_doorbell_clear);
517 
518         /* Dummy readl to force pci flush */
519         readl(&regs->outbound_doorbell_clear);
520 
521         return mfiStatus;
522 }
523 
524 /**
525  * megasas_fire_cmd_ppc -       Sends command to the FW
526  * @frame_phys_addr :           Physical address of cmd
527  * @frame_count :               Number of frames for the command
528  * @regs :                      MFI register set
529  */
530 static inline void
531 megasas_fire_cmd_ppc(struct megasas_instance *instance,
532                 dma_addr_t frame_phys_addr,
533                 u32 frame_count,
534                 struct megasas_register_set __iomem *regs)
535 {
536         unsigned long flags;
537         spin_lock_irqsave(&instance->hba_lock, flags);
538         writel((frame_phys_addr | (frame_count<<1))|1,
539                         &(regs)->inbound_queue_port);
540         spin_unlock_irqrestore(&instance->hba_lock, flags);
541 }
542 
543 /**
544  * megasas_check_reset_ppc -    For controller reset check
545  * @regs:                               MFI register set
546  */
547 static int
548 megasas_check_reset_ppc(struct megasas_instance *instance,
549                         struct megasas_register_set __iomem *regs)
550 {
551         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
552                 return 1;
553 
554         return 0;
555 }
556 
557 static struct megasas_instance_template megasas_instance_template_ppc = {
558 
559         .fire_cmd = megasas_fire_cmd_ppc,
560         .enable_intr = megasas_enable_intr_ppc,
561         .disable_intr = megasas_disable_intr_ppc,
562         .clear_intr = megasas_clear_intr_ppc,
563         .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
564         .adp_reset = megasas_adp_reset_xscale,
565         .check_reset = megasas_check_reset_ppc,
566         .service_isr = megasas_isr,
567         .tasklet = megasas_complete_cmd_dpc,
568         .init_adapter = megasas_init_adapter_mfi,
569         .build_and_issue_cmd = megasas_build_and_issue_cmd,
570         .issue_dcmd = megasas_issue_dcmd,
571 };
572 
573 /**
574  * megasas_enable_intr_skinny - Enables interrupts
575  * @regs:                       MFI register set
576  */
577 static inline void
578 megasas_enable_intr_skinny(struct megasas_instance *instance)
579 {
580         struct megasas_register_set __iomem *regs;
581         regs = instance->reg_set;
582         writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
583 
584         writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
585 
586         /* Dummy readl to force pci flush */
587         readl(&regs->outbound_intr_mask);
588 }
589 
590 /**
591  * megasas_disable_intr_skinny -        Disables interrupt
592  * @regs:                       MFI register set
593  */
594 static inline void
595 megasas_disable_intr_skinny(struct megasas_instance *instance)
596 {
597         struct megasas_register_set __iomem *regs;
598         u32 mask = 0xFFFFFFFF;
599         regs = instance->reg_set;
600         writel(mask, &regs->outbound_intr_mask);
601         /* Dummy readl to force pci flush */
602         readl(&regs->outbound_intr_mask);
603 }
604 
605 /**
606  * megasas_read_fw_status_reg_skinny - returns the current FW status value
607  * @regs:                       MFI register set
608  */
609 static u32
610 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
611 {
612         return readl(&(regs)->outbound_scratch_pad);
613 }
614 
615 /**
616  * megasas_clear_interrupt_skinny -     Check & clear interrupt
617  * @regs:                               MFI register set
618  */
619 static int
620 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
621 {
622         u32 status;
623         u32 mfiStatus = 0;
624 
625         /*
626          * Check if it is our interrupt
627          */
628         status = readl(&regs->outbound_intr_status);
629 
630         if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
631                 return 0;
632         }
633 
634         /*
635          * Check if it is our interrupt
636          */
637         if ((megasas_read_fw_status_reg_skinny(regs) & MFI_STATE_MASK) ==
638             MFI_STATE_FAULT) {
639                 mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
640         } else
641                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
642 
643         /*
644          * Clear the interrupt by writing back the same value
645          */
646         writel(status, &regs->outbound_intr_status);
647 
648         /*
649         * dummy read to flush PCI
650         */
651         readl(&regs->outbound_intr_status);
652 
653         return mfiStatus;
654 }
655 
656 /**
657  * megasas_fire_cmd_skinny -    Sends command to the FW
658  * @frame_phys_addr :           Physical address of cmd
659  * @frame_count :               Number of frames for the command
660  * @regs :                      MFI register set
661  */
662 static inline void
663 megasas_fire_cmd_skinny(struct megasas_instance *instance,
664                         dma_addr_t frame_phys_addr,
665                         u32 frame_count,
666                         struct megasas_register_set __iomem *regs)
667 {
668         unsigned long flags;
669         spin_lock_irqsave(&instance->hba_lock, flags);
670         writel(upper_32_bits(frame_phys_addr),
671                &(regs)->inbound_high_queue_port);
672         writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
673                &(regs)->inbound_low_queue_port);
674         spin_unlock_irqrestore(&instance->hba_lock, flags);
675 }
676 
677 /**
678  * megasas_check_reset_skinny - For controller reset check
679  * @regs:                               MFI register set
680  */
681 static int
682 megasas_check_reset_skinny(struct megasas_instance *instance,
683                                 struct megasas_register_set __iomem *regs)
684 {
685         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
686                 return 1;
687 
688         return 0;
689 }
690 
691 static struct megasas_instance_template megasas_instance_template_skinny = {
692 
693         .fire_cmd = megasas_fire_cmd_skinny,
694         .enable_intr = megasas_enable_intr_skinny,
695         .disable_intr = megasas_disable_intr_skinny,
696         .clear_intr = megasas_clear_intr_skinny,
697         .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
698         .adp_reset = megasas_adp_reset_gen2,
699         .check_reset = megasas_check_reset_skinny,
700         .service_isr = megasas_isr,
701         .tasklet = megasas_complete_cmd_dpc,
702         .init_adapter = megasas_init_adapter_mfi,
703         .build_and_issue_cmd = megasas_build_and_issue_cmd,
704         .issue_dcmd = megasas_issue_dcmd,
705 };
706 
707 
708 /**
709 *       The following functions are defined for gen2 (deviceid : 0x78 0x79)
710 *       controllers
711 */
712 
713 /**
714  * megasas_enable_intr_gen2 -  Enables interrupts
715  * @regs:                      MFI register set
716  */
717 static inline void
718 megasas_enable_intr_gen2(struct megasas_instance *instance)
719 {
720         struct megasas_register_set __iomem *regs;
721         regs = instance->reg_set;
722         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
723 
724         /* write ~0x00000005 (4 & 1) to the intr mask*/
725         writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
726 
727         /* Dummy readl to force pci flush */
728         readl(&regs->outbound_intr_mask);
729 }
730 
731 /**
732  * megasas_disable_intr_gen2 - Disables interrupt
733  * @regs:                      MFI register set
734  */
735 static inline void
736 megasas_disable_intr_gen2(struct megasas_instance *instance)
737 {
738         struct megasas_register_set __iomem *regs;
739         u32 mask = 0xFFFFFFFF;
740         regs = instance->reg_set;
741         writel(mask, &regs->outbound_intr_mask);
742         /* Dummy readl to force pci flush */
743         readl(&regs->outbound_intr_mask);
744 }
745 
746 /**
747  * megasas_read_fw_status_reg_gen2 - returns the current FW status value
748  * @regs:                      MFI register set
749  */
750 static u32
751 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
752 {
753         return readl(&(regs)->outbound_scratch_pad);
754 }
755 
756 /**
757  * megasas_clear_interrupt_gen2 -      Check & clear interrupt
758  * @regs:                              MFI register set
759  */
760 static int
761 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
762 {
763         u32 status;
764         u32 mfiStatus = 0;
765         /*
766          * Check if it is our interrupt
767          */
768         status = readl(&regs->outbound_intr_status);
769 
770         if (status & MFI_INTR_FLAG_REPLY_MESSAGE) {
771                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
772         }
773         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
774                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
775         }
776 
777         /*
778          * Clear the interrupt by writing back the same value
779          */
780         if (mfiStatus)
781                 writel(status, &regs->outbound_doorbell_clear);
782 
783         /* Dummy readl to force pci flush */
784         readl(&regs->outbound_intr_status);
785 
786         return mfiStatus;
787 }
788 /**
789  * megasas_fire_cmd_gen2 -     Sends command to the FW
790  * @frame_phys_addr :          Physical address of cmd
791  * @frame_count :              Number of frames for the command
792  * @regs :                     MFI register set
793  */
794 static inline void
795 megasas_fire_cmd_gen2(struct megasas_instance *instance,
796                         dma_addr_t frame_phys_addr,
797                         u32 frame_count,
798                         struct megasas_register_set __iomem *regs)
799 {
800         unsigned long flags;
801         spin_lock_irqsave(&instance->hba_lock, flags);
802         writel((frame_phys_addr | (frame_count<<1))|1,
803                         &(regs)->inbound_queue_port);
804         spin_unlock_irqrestore(&instance->hba_lock, flags);
805 }
806 
807 /**
808  * megasas_adp_reset_gen2 -     For controller reset
809  * @regs:                               MFI register set
810  */
811 static int
812 megasas_adp_reset_gen2(struct megasas_instance *instance,
813                         struct megasas_register_set __iomem *reg_set)
814 {
815         u32                     retry = 0 ;
816         u32                     HostDiag;
817         u32                     *seq_offset = &reg_set->seq_offset;
818         u32                     *hostdiag_offset = &reg_set->host_diag;
819 
820         if (instance->instancet == &megasas_instance_template_skinny) {
821                 seq_offset = &reg_set->fusion_seq_offset;
822                 hostdiag_offset = &reg_set->fusion_host_diag;
823         }
824 
825         writel(0, seq_offset);
826         writel(4, seq_offset);
827         writel(0xb, seq_offset);
828         writel(2, seq_offset);
829         writel(7, seq_offset);
830         writel(0xd, seq_offset);
831 
832         msleep(1000);
833 
834         HostDiag = (u32)readl(hostdiag_offset);
835 
836         while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
837                 msleep(100);
838                 HostDiag = (u32)readl(hostdiag_offset);
839                 printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
840                                         retry, HostDiag);
841 
842                 if (retry++ >= 100)
843                         return 1;
844 
845         }
846 
847         printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
848 
849         writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
850 
851         ssleep(10);
852 
853         HostDiag = (u32)readl(hostdiag_offset);
854         while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
855                 msleep(100);
856                 HostDiag = (u32)readl(hostdiag_offset);
857                 printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
858                                 retry, HostDiag);
859 
860                 if (retry++ >= 1000)
861                         return 1;
862 
863         }
864         return 0;
865 }
866 
867 /**
868  * megasas_check_reset_gen2 -   For controller reset check
869  * @regs:                               MFI register set
870  */
871 static int
872 megasas_check_reset_gen2(struct megasas_instance *instance,
873                 struct megasas_register_set __iomem *regs)
874 {
875         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
876                 return 1;
877         }
878 
879         return 0;
880 }
881 
882 static struct megasas_instance_template megasas_instance_template_gen2 = {
883 
884         .fire_cmd = megasas_fire_cmd_gen2,
885         .enable_intr = megasas_enable_intr_gen2,
886         .disable_intr = megasas_disable_intr_gen2,
887         .clear_intr = megasas_clear_intr_gen2,
888         .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
889         .adp_reset = megasas_adp_reset_gen2,
890         .check_reset = megasas_check_reset_gen2,
891         .service_isr = megasas_isr,
892         .tasklet = megasas_complete_cmd_dpc,
893         .init_adapter = megasas_init_adapter_mfi,
894         .build_and_issue_cmd = megasas_build_and_issue_cmd,
895         .issue_dcmd = megasas_issue_dcmd,
896 };
897 
898 /**
899 *       This is the end of set of functions & definitions
900 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
901 */
902 
903 /*
904  * Template added for TB (Fusion)
905  */
906 extern struct megasas_instance_template megasas_instance_template_fusion;
907 
908 /**
909  * megasas_issue_polled -       Issues a polling command
910  * @instance:                   Adapter soft state
911  * @cmd:                        Command packet to be issued
912  *
913  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
914  */
915 int
916 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
917 {
918         int seconds;
919 
920         struct megasas_header *frame_hdr = &cmd->frame->hdr;
921 
922         frame_hdr->cmd_status = MFI_CMD_STATUS_POLL_MODE;
923         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
924 
925         /*
926          * Issue the frame using inbound queue port
927          */
928         instance->instancet->issue_dcmd(instance, cmd);
929 
930         /*
931          * Wait for cmd_status to change
932          */
933         if (instance->requestorId)
934                 seconds = MEGASAS_ROUTINE_WAIT_TIME_VF;
935         else
936                 seconds = MFI_POLL_TIMEOUT_SECS;
937         return wait_and_poll(instance, cmd, seconds);
938 }
939 
940 /**
941  * megasas_issue_blocked_cmd -  Synchronous wrapper around regular FW cmds
942  * @instance:                   Adapter soft state
943  * @cmd:                        Command to be issued
944  * @timeout:                    Timeout in seconds
945  *
946  * This function waits on an event for the command to be returned from ISR.
947  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
948  * Used to issue ioctl commands.
949  */
950 int
951 megasas_issue_blocked_cmd(struct megasas_instance *instance,
952                           struct megasas_cmd *cmd, int timeout)
953 {
954         int ret = 0;
955         cmd->cmd_status = ENODATA;
956 
957         cmd->is_wait_event = 1;
958         instance->instancet->issue_dcmd(instance, cmd);
959         if (timeout) {
960                 ret = wait_event_timeout(instance->int_cmd_wait_q,
961                                 cmd->cmd_status != ENODATA, timeout * HZ);
962                 if (!ret)
963                         return 1;
964         } else
965                 wait_event(instance->int_cmd_wait_q,
966                                 cmd->cmd_status != ENODATA);
967 
968         return 0;
969 }
970 
971 /**
972  * megasas_issue_blocked_abort_cmd -    Aborts previously issued cmd
973  * @instance:                           Adapter soft state
974  * @cmd_to_abort:                       Previously issued cmd to be aborted
975  * @timeout:                            Timeout in seconds
976  *
977  * MFI firmware can abort previously issued AEN comamnd (automatic event
978  * notification). The megasas_issue_blocked_abort_cmd() issues such abort
979  * cmd and waits for return status.
980  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
981  */
982 static int
983 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
984                                 struct megasas_cmd *cmd_to_abort, int timeout)
985 {
986         struct megasas_cmd *cmd;
987         struct megasas_abort_frame *abort_fr;
988         int ret = 0;
989 
990         cmd = megasas_get_cmd(instance);
991 
992         if (!cmd)
993                 return -1;
994 
995         abort_fr = &cmd->frame->abort;
996 
997         /*
998          * Prepare and issue the abort frame
999          */
1000         abort_fr->cmd = MFI_CMD_ABORT;
1001         abort_fr->cmd_status = 0xFF;
1002         abort_fr->flags = cpu_to_le16(0);
1003         abort_fr->abort_context = cpu_to_le32(cmd_to_abort->index);
1004         abort_fr->abort_mfi_phys_addr_lo =
1005                 cpu_to_le32(lower_32_bits(cmd_to_abort->frame_phys_addr));
1006         abort_fr->abort_mfi_phys_addr_hi =
1007                 cpu_to_le32(upper_32_bits(cmd_to_abort->frame_phys_addr));
1008 
1009         cmd->sync_cmd = 1;
1010         cmd->cmd_status = ENODATA;
1011 
1012         instance->instancet->issue_dcmd(instance, cmd);
1013 
1014         if (timeout) {
1015                 ret = wait_event_timeout(instance->abort_cmd_wait_q,
1016                                 cmd->cmd_status != ENODATA, timeout * HZ);
1017                 if (!ret) {
1018                         dev_err(&instance->pdev->dev, "Command timedout"
1019                                 "from %s\n", __func__);
1020                         return 1;
1021                 }
1022         } else
1023                 wait_event(instance->abort_cmd_wait_q,
1024                                 cmd->cmd_status != ENODATA);
1025 
1026         cmd->sync_cmd = 0;
1027 
1028         megasas_return_cmd(instance, cmd);
1029         return 0;
1030 }
1031 
1032 /**
1033  * megasas_make_sgl32 - Prepares 32-bit SGL
1034  * @instance:           Adapter soft state
1035  * @scp:                SCSI command from the mid-layer
1036  * @mfi_sgl:            SGL to be filled in
1037  *
1038  * If successful, this function returns the number of SG elements. Otherwise,
1039  * it returnes -1.
1040  */
1041 static int
1042 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
1043                    union megasas_sgl *mfi_sgl)
1044 {
1045         int i;
1046         int sge_count;
1047         struct scatterlist *os_sgl;
1048 
1049         sge_count = scsi_dma_map(scp);
1050         BUG_ON(sge_count < 0);
1051 
1052         if (sge_count) {
1053                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1054                         mfi_sgl->sge32[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1055                         mfi_sgl->sge32[i].phys_addr = cpu_to_le32(sg_dma_address(os_sgl));
1056                 }
1057         }
1058         return sge_count;
1059 }
1060 
1061 /**
1062  * megasas_make_sgl64 - Prepares 64-bit SGL
1063  * @instance:           Adapter soft state
1064  * @scp:                SCSI command from the mid-layer
1065  * @mfi_sgl:            SGL to be filled in
1066  *
1067  * If successful, this function returns the number of SG elements. Otherwise,
1068  * it returnes -1.
1069  */
1070 static int
1071 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
1072                    union megasas_sgl *mfi_sgl)
1073 {
1074         int i;
1075         int sge_count;
1076         struct scatterlist *os_sgl;
1077 
1078         sge_count = scsi_dma_map(scp);
1079         BUG_ON(sge_count < 0);
1080 
1081         if (sge_count) {
1082                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1083                         mfi_sgl->sge64[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1084                         mfi_sgl->sge64[i].phys_addr = cpu_to_le64(sg_dma_address(os_sgl));
1085                 }
1086         }
1087         return sge_count;
1088 }
1089 
1090 /**
1091  * megasas_make_sgl_skinny - Prepares IEEE SGL
1092  * @instance:           Adapter soft state
1093  * @scp:                SCSI command from the mid-layer
1094  * @mfi_sgl:            SGL to be filled in
1095  *
1096  * If successful, this function returns the number of SG elements. Otherwise,
1097  * it returnes -1.
1098  */
1099 static int
1100 megasas_make_sgl_skinny(struct megasas_instance *instance,
1101                 struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
1102 {
1103         int i;
1104         int sge_count;
1105         struct scatterlist *os_sgl;
1106 
1107         sge_count = scsi_dma_map(scp);
1108 
1109         if (sge_count) {
1110                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1111                         mfi_sgl->sge_skinny[i].length =
1112                                 cpu_to_le32(sg_dma_len(os_sgl));
1113                         mfi_sgl->sge_skinny[i].phys_addr =
1114                                 cpu_to_le64(sg_dma_address(os_sgl));
1115                         mfi_sgl->sge_skinny[i].flag = cpu_to_le32(0);
1116                 }
1117         }
1118         return sge_count;
1119 }
1120 
1121  /**
1122  * megasas_get_frame_count - Computes the number of frames
1123  * @frame_type          : type of frame- io or pthru frame
1124  * @sge_count           : number of sg elements
1125  *
1126  * Returns the number of frames required for numnber of sge's (sge_count)
1127  */
1128 
1129 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1130                         u8 sge_count, u8 frame_type)
1131 {
1132         int num_cnt;
1133         int sge_bytes;
1134         u32 sge_sz;
1135         u32 frame_count=0;
1136 
1137         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1138             sizeof(struct megasas_sge32);
1139 
1140         if (instance->flag_ieee) {
1141                 sge_sz = sizeof(struct megasas_sge_skinny);
1142         }
1143 
1144         /*
1145          * Main frame can contain 2 SGEs for 64-bit SGLs and
1146          * 3 SGEs for 32-bit SGLs for ldio &
1147          * 1 SGEs for 64-bit SGLs and
1148          * 2 SGEs for 32-bit SGLs for pthru frame
1149          */
1150         if (unlikely(frame_type == PTHRU_FRAME)) {
1151                 if (instance->flag_ieee == 1) {
1152                         num_cnt = sge_count - 1;
1153                 } else if (IS_DMA64)
1154                         num_cnt = sge_count - 1;
1155                 else
1156                         num_cnt = sge_count - 2;
1157         } else {
1158                 if (instance->flag_ieee == 1) {
1159                         num_cnt = sge_count - 1;
1160                 } else if (IS_DMA64)
1161                         num_cnt = sge_count - 2;
1162                 else
1163                         num_cnt = sge_count - 3;
1164         }
1165 
1166         if(num_cnt>0){
1167                 sge_bytes = sge_sz * num_cnt;
1168 
1169                 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1170                     ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1171         }
1172         /* Main frame */
1173         frame_count +=1;
1174 
1175         if (frame_count > 7)
1176                 frame_count = 8;
1177         return frame_count;
1178 }
1179 
1180 /**
1181  * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
1182  * @instance:           Adapter soft state
1183  * @scp:                SCSI command
1184  * @cmd:                Command to be prepared in
1185  *
1186  * This function prepares CDB commands. These are typcially pass-through
1187  * commands to the devices.
1188  */
1189 static int
1190 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1191                    struct megasas_cmd *cmd)
1192 {
1193         u32 is_logical;
1194         u32 device_id;
1195         u16 flags = 0;
1196         struct megasas_pthru_frame *pthru;
1197 
1198         is_logical = MEGASAS_IS_LOGICAL(scp);
1199         device_id = MEGASAS_DEV_INDEX(instance, scp);
1200         pthru = (struct megasas_pthru_frame *)cmd->frame;
1201 
1202         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1203                 flags = MFI_FRAME_DIR_WRITE;
1204         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1205                 flags = MFI_FRAME_DIR_READ;
1206         else if (scp->sc_data_direction == PCI_DMA_NONE)
1207                 flags = MFI_FRAME_DIR_NONE;
1208 
1209         if (instance->flag_ieee == 1) {
1210                 flags |= MFI_FRAME_IEEE;
1211         }
1212 
1213         /*
1214          * Prepare the DCDB frame
1215          */
1216         pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1217         pthru->cmd_status = 0x0;
1218         pthru->scsi_status = 0x0;
1219         pthru->target_id = device_id;
1220         pthru->lun = scp->device->lun;
1221         pthru->cdb_len = scp->cmd_len;
1222         pthru->timeout = 0;
1223         pthru->pad_0 = 0;
1224         pthru->flags = cpu_to_le16(flags);
1225         pthru->data_xfer_len = cpu_to_le32(scsi_bufflen(scp));
1226 
1227         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1228 
1229         /*
1230         * If the command is for the tape device, set the
1231         * pthru timeout to the os layer timeout value.
1232         */
1233         if (scp->device->type == TYPE_TAPE) {
1234                 if ((scp->request->timeout / HZ) > 0xFFFF)
1235                         pthru->timeout = 0xFFFF;
1236                 else
1237                         pthru->timeout = cpu_to_le16(scp->request->timeout / HZ);
1238         }
1239 
1240         /*
1241          * Construct SGL
1242          */
1243         if (instance->flag_ieee == 1) {
1244                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1245                 pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1246                                                       &pthru->sgl);
1247         } else if (IS_DMA64) {
1248                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1249                 pthru->sge_count = megasas_make_sgl64(instance, scp,
1250                                                       &pthru->sgl);
1251         } else
1252                 pthru->sge_count = megasas_make_sgl32(instance, scp,
1253                                                       &pthru->sgl);
1254 
1255         if (pthru->sge_count > instance->max_num_sge) {
1256                 printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1257                         pthru->sge_count);
1258                 return 0;
1259         }
1260 
1261         /*
1262          * Sense info specific
1263          */
1264         pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1265         pthru->sense_buf_phys_addr_hi =
1266                 cpu_to_le32(upper_32_bits(cmd->sense_phys_addr));
1267         pthru->sense_buf_phys_addr_lo =
1268                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
1269 
1270         /*
1271          * Compute the total number of frames this command consumes. FW uses
1272          * this number to pull sufficient number of frames from host memory.
1273          */
1274         cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1275                                                         PTHRU_FRAME);
1276 
1277         return cmd->frame_count;
1278 }
1279 
1280 /**
1281  * megasas_build_ldio - Prepares IOs to logical devices
1282  * @instance:           Adapter soft state
1283  * @scp:                SCSI command
1284  * @cmd:                Command to be prepared
1285  *
1286  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1287  */
1288 static int
1289 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1290                    struct megasas_cmd *cmd)
1291 {
1292         u32 device_id;
1293         u8 sc = scp->cmnd[0];
1294         u16 flags = 0;
1295         struct megasas_io_frame *ldio;
1296 
1297         device_id = MEGASAS_DEV_INDEX(instance, scp);
1298         ldio = (struct megasas_io_frame *)cmd->frame;
1299 
1300         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1301                 flags = MFI_FRAME_DIR_WRITE;
1302         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1303                 flags = MFI_FRAME_DIR_READ;
1304 
1305         if (instance->flag_ieee == 1) {
1306                 flags |= MFI_FRAME_IEEE;
1307         }
1308 
1309         /*
1310          * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1311          */
1312         ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1313         ldio->cmd_status = 0x0;
1314         ldio->scsi_status = 0x0;
1315         ldio->target_id = device_id;
1316         ldio->timeout = 0;
1317         ldio->reserved_0 = 0;
1318         ldio->pad_0 = 0;
1319         ldio->flags = cpu_to_le16(flags);
1320         ldio->start_lba_hi = 0;
1321         ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1322 
1323         /*
1324          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1325          */
1326         if (scp->cmd_len == 6) {
1327                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[4]);
1328                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[1] << 16) |
1329                                                  ((u32) scp->cmnd[2] << 8) |
1330                                                  (u32) scp->cmnd[3]);
1331 
1332                 ldio->start_lba_lo &= cpu_to_le32(0x1FFFFF);
1333         }
1334 
1335         /*
1336          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1337          */
1338         else if (scp->cmd_len == 10) {
1339                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[8] |
1340                                               ((u32) scp->cmnd[7] << 8));
1341                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1342                                                  ((u32) scp->cmnd[3] << 16) |
1343                                                  ((u32) scp->cmnd[4] << 8) |
1344                                                  (u32) scp->cmnd[5]);
1345         }
1346 
1347         /*
1348          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1349          */
1350         else if (scp->cmd_len == 12) {
1351                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1352                                               ((u32) scp->cmnd[7] << 16) |
1353                                               ((u32) scp->cmnd[8] << 8) |
1354                                               (u32) scp->cmnd[9]);
1355 
1356                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1357                                                  ((u32) scp->cmnd[3] << 16) |
1358                                                  ((u32) scp->cmnd[4] << 8) |
1359                                                  (u32) scp->cmnd[5]);
1360         }
1361 
1362         /*
1363          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1364          */
1365         else if (scp->cmd_len == 16) {
1366                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[10] << 24) |
1367                                               ((u32) scp->cmnd[11] << 16) |
1368                                               ((u32) scp->cmnd[12] << 8) |
1369                                               (u32) scp->cmnd[13]);
1370 
1371                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1372                                                  ((u32) scp->cmnd[7] << 16) |
1373                                                  ((u32) scp->cmnd[8] << 8) |
1374                                                  (u32) scp->cmnd[9]);
1375 
1376                 ldio->start_lba_hi = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1377                                                  ((u32) scp->cmnd[3] << 16) |
1378                                                  ((u32) scp->cmnd[4] << 8) |
1379                                                  (u32) scp->cmnd[5]);
1380 
1381         }
1382 
1383         /*
1384          * Construct SGL
1385          */
1386         if (instance->flag_ieee) {
1387                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1388                 ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1389                                               &ldio->sgl);
1390         } else if (IS_DMA64) {
1391                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1392                 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1393         } else
1394                 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1395 
1396         if (ldio->sge_count > instance->max_num_sge) {
1397                 printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1398                         ldio->sge_count);
1399                 return 0;
1400         }
1401 
1402         /*
1403          * Sense info specific
1404          */
1405         ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1406         ldio->sense_buf_phys_addr_hi = 0;
1407         ldio->sense_buf_phys_addr_lo = cpu_to_le32(cmd->sense_phys_addr);
1408 
1409         /*
1410          * Compute the total number of frames this command consumes. FW uses
1411          * this number to pull sufficient number of frames from host memory.
1412          */
1413         cmd->frame_count = megasas_get_frame_count(instance,
1414                         ldio->sge_count, IO_FRAME);
1415 
1416         return cmd->frame_count;
1417 }
1418 
1419 /**
1420  * megasas_cmd_type -           Checks if the cmd is for logical drive/sysPD
1421  *                              and whether it's RW or non RW
1422  * @scmd:                       SCSI command
1423  *
1424  */
1425 inline int megasas_cmd_type(struct scsi_cmnd *cmd)
1426 {
1427         int ret;
1428 
1429         switch (cmd->cmnd[0]) {
1430         case READ_10:
1431         case WRITE_10:
1432         case READ_12:
1433         case WRITE_12:
1434         case READ_6:
1435         case WRITE_6:
1436         case READ_16:
1437         case WRITE_16:
1438                 ret = (MEGASAS_IS_LOGICAL(cmd)) ?
1439                         READ_WRITE_LDIO : READ_WRITE_SYSPDIO;
1440                 break;
1441         default:
1442                 ret = (MEGASAS_IS_LOGICAL(cmd)) ?
1443                         NON_READ_WRITE_LDIO : NON_READ_WRITE_SYSPDIO;
1444         }
1445         return ret;
1446 }
1447 
1448  /**
1449  * megasas_dump_pending_frames -        Dumps the frame address of all pending cmds
1450  *                                      in FW
1451  * @instance:                           Adapter soft state
1452  */
1453 static inline void
1454 megasas_dump_pending_frames(struct megasas_instance *instance)
1455 {
1456         struct megasas_cmd *cmd;
1457         int i,n;
1458         union megasas_sgl *mfi_sgl;
1459         struct megasas_io_frame *ldio;
1460         struct megasas_pthru_frame *pthru;
1461         u32 sgcount;
1462         u32 max_cmd = instance->max_fw_cmds;
1463 
1464         printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1465         printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1466         if (IS_DMA64)
1467                 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1468         else
1469                 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1470 
1471         printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1472         for (i = 0; i < max_cmd; i++) {
1473                 cmd = instance->cmd_list[i];
1474                 if(!cmd->scmd)
1475                         continue;
1476                 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1477                 if (megasas_cmd_type(cmd->scmd) == READ_WRITE_LDIO) {
1478                         ldio = (struct megasas_io_frame *)cmd->frame;
1479                         mfi_sgl = &ldio->sgl;
1480                         sgcount = ldio->sge_count;
1481                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x,"
1482                         " lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1483                         instance->host->host_no, cmd->frame_count, ldio->cmd, ldio->target_id,
1484                         le32_to_cpu(ldio->start_lba_lo), le32_to_cpu(ldio->start_lba_hi),
1485                         le32_to_cpu(ldio->sense_buf_phys_addr_lo), sgcount);
1486                 }
1487                 else {
1488                         pthru = (struct megasas_pthru_frame *) cmd->frame;
1489                         mfi_sgl = &pthru->sgl;
1490                         sgcount = pthru->sge_count;
1491                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, "
1492                         "lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1493                         instance->host->host_no, cmd->frame_count, pthru->cmd, pthru->target_id,
1494                         pthru->lun, pthru->cdb_len, le32_to_cpu(pthru->data_xfer_len),
1495                         le32_to_cpu(pthru->sense_buf_phys_addr_lo), sgcount);
1496                 }
1497         if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1498                 for (n = 0; n < sgcount; n++){
1499                         if (IS_DMA64)
1500                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%llx ",
1501                                         le32_to_cpu(mfi_sgl->sge64[n].length),
1502                                         le64_to_cpu(mfi_sgl->sge64[n].phys_addr));
1503                         else
1504                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",
1505                                         le32_to_cpu(mfi_sgl->sge32[n].length),
1506                                         le32_to_cpu(mfi_sgl->sge32[n].phys_addr));
1507                         }
1508                 }
1509                 printk(KERN_ERR "\n");
1510         } /*for max_cmd*/
1511         printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1512         for (i = 0; i < max_cmd; i++) {
1513 
1514                 cmd = instance->cmd_list[i];
1515 
1516                 if(cmd->sync_cmd == 1){
1517                         printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1518                 }
1519         }
1520         printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1521 }
1522 
1523 u32
1524 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1525                             struct scsi_cmnd *scmd)
1526 {
1527         struct megasas_cmd *cmd;
1528         u32 frame_count;
1529 
1530         cmd = megasas_get_cmd(instance);
1531         if (!cmd)
1532                 return SCSI_MLQUEUE_HOST_BUSY;
1533 
1534         /*
1535          * Logical drive command
1536          */
1537         if (megasas_cmd_type(scmd) == READ_WRITE_LDIO)
1538                 frame_count = megasas_build_ldio(instance, scmd, cmd);
1539         else
1540                 frame_count = megasas_build_dcdb(instance, scmd, cmd);
1541 
1542         if (!frame_count)
1543                 goto out_return_cmd;
1544 
1545         cmd->scmd = scmd;
1546         scmd->SCp.ptr = (char *)cmd;
1547 
1548         /*
1549          * Issue the command to the FW
1550          */
1551         atomic_inc(&instance->fw_outstanding);
1552 
1553         instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1554                                 cmd->frame_count-1, instance->reg_set);
1555 
1556         return 0;
1557 out_return_cmd:
1558         megasas_return_cmd(instance, cmd);
1559         return 1;
1560 }
1561 
1562 
1563 /**
1564  * megasas_queue_command -      Queue entry point
1565  * @scmd:                       SCSI command to be queued
1566  * @done:                       Callback entry point
1567  */
1568 static int
1569 megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
1570 {
1571         struct megasas_instance *instance;
1572         unsigned long flags;
1573 
1574         instance = (struct megasas_instance *)
1575             scmd->device->host->hostdata;
1576 
1577         if (instance->unload == 1) {
1578                 scmd->result = DID_NO_CONNECT << 16;
1579                 scmd->scsi_done(scmd);
1580                 return 0;
1581         }
1582 
1583         if (instance->issuepend_done == 0)
1584                 return SCSI_MLQUEUE_HOST_BUSY;
1585 
1586         spin_lock_irqsave(&instance->hba_lock, flags);
1587 
1588         /* Check for an mpio path and adjust behavior */
1589         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
1590                 if (megasas_check_mpio_paths(instance, scmd) ==
1591                     (DID_RESET << 16)) {
1592                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1593                         return SCSI_MLQUEUE_HOST_BUSY;
1594                 } else {
1595                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1596                         scmd->result = DID_NO_CONNECT << 16;
1597                         scmd->scsi_done(scmd);
1598                         return 0;
1599                 }
1600         }
1601 
1602         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1603                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1604                 scmd->result = DID_NO_CONNECT << 16;
1605                 scmd->scsi_done(scmd);
1606                 return 0;
1607         }
1608 
1609         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1610                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1611                 return SCSI_MLQUEUE_HOST_BUSY;
1612         }
1613 
1614         spin_unlock_irqrestore(&instance->hba_lock, flags);
1615 
1616         scmd->result = 0;
1617 
1618         if (MEGASAS_IS_LOGICAL(scmd) &&
1619             (scmd->device->id >= instance->fw_supported_vd_count ||
1620                 scmd->device->lun)) {
1621                 scmd->result = DID_BAD_TARGET << 16;
1622                 goto out_done;
1623         }
1624 
1625         switch (scmd->cmnd[0]) {
1626         case SYNCHRONIZE_CACHE:
1627                 /*
1628                  * FW takes care of flush cache on its own
1629                  * No need to send it down
1630                  */
1631                 scmd->result = DID_OK << 16;
1632                 goto out_done;
1633         default:
1634                 break;
1635         }
1636 
1637         if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1638                 printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1639                 return SCSI_MLQUEUE_HOST_BUSY;
1640         }
1641 
1642         return 0;
1643 
1644  out_done:
1645         scmd->scsi_done(scmd);
1646         return 0;
1647 }
1648 
1649 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1650 {
1651         int i;
1652 
1653         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1654 
1655                 if ((megasas_mgmt_info.instance[i]) &&
1656                     (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1657                         return megasas_mgmt_info.instance[i];
1658         }
1659 
1660         return NULL;
1661 }
1662 
1663 static int megasas_slave_configure(struct scsi_device *sdev)
1664 {
1665         /*
1666         * The RAID firmware may require extended timeouts.
1667         */
1668         blk_queue_rq_timeout(sdev->request_queue,
1669                 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1670 
1671         return 0;
1672 }
1673 
1674 static int megasas_slave_alloc(struct scsi_device *sdev)
1675 {
1676         u16             pd_index = 0;
1677         struct megasas_instance *instance ;
1678         instance = megasas_lookup_instance(sdev->host->host_no);
1679         if (sdev->channel < MEGASAS_MAX_PD_CHANNELS) {
1680                 /*
1681                  * Open the OS scan to the SYSTEM PD
1682                  */
1683                 pd_index =
1684                         (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1685                         sdev->id;
1686                 if (instance->pd_list[pd_index].driveState ==
1687                                         MR_PD_STATE_SYSTEM) {
1688                         return 0;
1689                 }
1690                 return -ENXIO;
1691         }
1692         return 0;
1693 }
1694 
1695 /*
1696 * megasas_complete_outstanding_ioctls - Complete outstanding ioctls after a
1697 *                                       kill adapter
1698 * @instance:                            Adapter soft state
1699 *
1700 */
1701 void megasas_complete_outstanding_ioctls(struct megasas_instance *instance)
1702 {
1703         int i;
1704         struct megasas_cmd *cmd_mfi;
1705         struct megasas_cmd_fusion *cmd_fusion;
1706         struct fusion_context *fusion = instance->ctrl_context;
1707 
1708         /* Find all outstanding ioctls */
1709         if (fusion) {
1710                 for (i = 0; i < instance->max_fw_cmds; i++) {
1711                         cmd_fusion = fusion->cmd_list[i];
1712                         if (cmd_fusion->sync_cmd_idx != (u32)ULONG_MAX) {
1713                                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1714                                 if (cmd_mfi->sync_cmd &&
1715                                         cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT)
1716                                         megasas_complete_cmd(instance,
1717                                                              cmd_mfi, DID_OK);
1718                         }
1719                 }
1720         } else {
1721                 for (i = 0; i < instance->max_fw_cmds; i++) {
1722                         cmd_mfi = instance->cmd_list[i];
1723                         if (cmd_mfi->sync_cmd && cmd_mfi->frame->hdr.cmd !=
1724                                 MFI_CMD_ABORT)
1725                                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1726                 }
1727         }
1728 }
1729 
1730 
1731 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1732 {
1733         /* Set critical error to block I/O & ioctls in case caller didn't */
1734         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
1735         /* Wait 1 second to ensure IO or ioctls in build have posted */
1736         msleep(1000);
1737         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1738                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1739                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
1740                 (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
1741                 (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1742                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1743                 writel(MFI_STOP_ADP,
1744                         &instance->reg_set->doorbell);
1745                 /* Flush */
1746                 readl(&instance->reg_set->doorbell);
1747                 if (instance->mpio && instance->requestorId)
1748                         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
1749         } else {
1750                 writel(MFI_STOP_ADP,
1751                         &instance->reg_set->inbound_doorbell);
1752         }
1753         /* Complete outstanding ioctls when adapter is killed */
1754         megasas_complete_outstanding_ioctls(instance);
1755 }
1756 
1757  /**
1758   * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1759   *                                     restored to max value
1760   * @instance:                  Adapter soft state
1761   *
1762   */
1763 void
1764 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1765 {
1766         unsigned long flags;
1767 
1768         if (instance->flag & MEGASAS_FW_BUSY
1769             && time_after(jiffies, instance->last_time + 5 * HZ)
1770             && atomic_read(&instance->fw_outstanding) <
1771             instance->throttlequeuedepth + 1) {
1772 
1773                 spin_lock_irqsave(instance->host->host_lock, flags);
1774                 instance->flag &= ~MEGASAS_FW_BUSY;
1775 
1776                 instance->host->can_queue = instance->max_scsi_cmds;
1777                 spin_unlock_irqrestore(instance->host->host_lock, flags);
1778         }
1779 }
1780 
1781 /**
1782  * megasas_complete_cmd_dpc      -      Returns FW's controller structure
1783  * @instance_addr:                      Address of adapter soft state
1784  *
1785  * Tasklet to complete cmds
1786  */
1787 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1788 {
1789         u32 producer;
1790         u32 consumer;
1791         u32 context;
1792         struct megasas_cmd *cmd;
1793         struct megasas_instance *instance =
1794                                 (struct megasas_instance *)instance_addr;
1795         unsigned long flags;
1796 
1797         /* If we have already declared adapter dead, donot complete cmds */
1798         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1799                 return;
1800 
1801         spin_lock_irqsave(&instance->completion_lock, flags);
1802 
1803         producer = le32_to_cpu(*instance->producer);
1804         consumer = le32_to_cpu(*instance->consumer);
1805 
1806         while (consumer != producer) {
1807                 context = le32_to_cpu(instance->reply_queue[consumer]);
1808                 if (context >= instance->max_fw_cmds) {
1809                         printk(KERN_ERR "Unexpected context value %x\n",
1810                                 context);
1811                         BUG();
1812                 }
1813 
1814                 cmd = instance->cmd_list[context];
1815 
1816                 megasas_complete_cmd(instance, cmd, DID_OK);
1817 
1818                 consumer++;
1819                 if (consumer == (instance->max_fw_cmds + 1)) {
1820                         consumer = 0;
1821                 }
1822         }
1823 
1824         *instance->consumer = cpu_to_le32(producer);
1825 
1826         spin_unlock_irqrestore(&instance->completion_lock, flags);
1827 
1828         /*
1829          * Check if we can restore can_queue
1830          */
1831         megasas_check_and_restore_queue_depth(instance);
1832 }
1833 
1834 /**
1835  * megasas_start_timer - Initializes a timer object
1836  * @instance:           Adapter soft state
1837  * @timer:              timer object to be initialized
1838  * @fn:                 timer function
1839  * @interval:           time interval between timer function call
1840  *
1841  */
1842 void megasas_start_timer(struct megasas_instance *instance,
1843                         struct timer_list *timer,
1844                         void *fn, unsigned long interval)
1845 {
1846         init_timer(timer);
1847         timer->expires = jiffies + interval;
1848         timer->data = (unsigned long)instance;
1849         timer->function = fn;
1850         add_timer(timer);
1851 }
1852 
1853 static void
1854 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1855 
1856 static void
1857 process_fw_state_change_wq(struct work_struct *work);
1858 
1859 void megasas_do_ocr(struct megasas_instance *instance)
1860 {
1861         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1862         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1863         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1864                 *instance->consumer = cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
1865         }
1866         instance->instancet->disable_intr(instance);
1867         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
1868         instance->issuepend_done = 0;
1869 
1870         atomic_set(&instance->fw_outstanding, 0);
1871         megasas_internal_reset_defer_cmds(instance);
1872         process_fw_state_change_wq(&instance->work_init);
1873 }
1874 
1875 static int megasas_get_ld_vf_affiliation_111(struct megasas_instance *instance,
1876                                             int initial)
1877 {
1878         struct megasas_cmd *cmd;
1879         struct megasas_dcmd_frame *dcmd;
1880         struct MR_LD_VF_AFFILIATION_111 *new_affiliation_111 = NULL;
1881         dma_addr_t new_affiliation_111_h;
1882         int ld, retval = 0;
1883         u8 thisVf;
1884 
1885         cmd = megasas_get_cmd(instance);
1886 
1887         if (!cmd) {
1888                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation_111:"
1889                        "Failed to get cmd for scsi%d.\n",
1890                         instance->host->host_no);
1891                 return -ENOMEM;
1892         }
1893 
1894         dcmd = &cmd->frame->dcmd;
1895 
1896         if (!instance->vf_affiliation_111) {
1897                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1898                        "affiliation for scsi%d.\n", instance->host->host_no);
1899                 megasas_return_cmd(instance, cmd);
1900                 return -ENOMEM;
1901         }
1902 
1903         if (initial)
1904                         memset(instance->vf_affiliation_111, 0,
1905                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1906         else {
1907                 new_affiliation_111 =
1908                         pci_alloc_consistent(instance->pdev,
1909                                              sizeof(struct MR_LD_VF_AFFILIATION_111),
1910                                              &new_affiliation_111_h);
1911                 if (!new_affiliation_111) {
1912                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1913                                "memory for new affiliation for scsi%d.\n",
1914                                instance->host->host_no);
1915                         megasas_return_cmd(instance, cmd);
1916                         return -ENOMEM;
1917                 }
1918                 memset(new_affiliation_111, 0,
1919                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1920         }
1921 
1922         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1923 
1924         dcmd->cmd = MFI_CMD_DCMD;
1925         dcmd->cmd_status = 0xFF;
1926         dcmd->sge_count = 1;
1927         dcmd->flags = MFI_FRAME_DIR_BOTH;
1928         dcmd->timeout = 0;
1929         dcmd->pad_0 = 0;
1930         dcmd->data_xfer_len = sizeof(struct MR_LD_VF_AFFILIATION_111);
1931         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS_111;
1932 
1933         if (initial)
1934                 dcmd->sgl.sge32[0].phys_addr =
1935                         instance->vf_affiliation_111_h;
1936         else
1937                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_111_h;
1938 
1939         dcmd->sgl.sge32[0].length =
1940                 sizeof(struct MR_LD_VF_AFFILIATION_111);
1941 
1942         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
1943                "scsi%d\n", instance->host->host_no);
1944 
1945         megasas_issue_blocked_cmd(instance, cmd, 0);
1946 
1947         if (dcmd->cmd_status) {
1948                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
1949                        " failed with status 0x%x for scsi%d.\n",
1950                        dcmd->cmd_status, instance->host->host_no);
1951                 retval = 1; /* Do a scan if we couldn't get affiliation */
1952                 goto out;
1953         }
1954 
1955         if (!initial) {
1956                 thisVf = new_affiliation_111->thisVf;
1957                 for (ld = 0 ; ld < new_affiliation_111->vdCount; ld++)
1958                         if (instance->vf_affiliation_111->map[ld].policy[thisVf] !=
1959                             new_affiliation_111->map[ld].policy[thisVf]) {
1960                                 printk(KERN_WARNING "megasas: SR-IOV: "
1961                                        "Got new LD/VF affiliation "
1962                                        "for scsi%d.\n",
1963                                        instance->host->host_no);
1964                                 memcpy(instance->vf_affiliation_111,
1965                                        new_affiliation_111,
1966                                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1967                                 retval = 1;
1968                                 goto out;
1969                         }
1970         }
1971 out:
1972         if (new_affiliation_111) {
1973                 pci_free_consistent(instance->pdev,
1974                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
1975                                     new_affiliation_111,
1976                                     new_affiliation_111_h);
1977         }
1978 
1979         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
1980                 megasas_return_mfi_mpt_pthr(instance, cmd,
1981                         cmd->mpt_pthr_cmd_blocked);
1982         else
1983                 megasas_return_cmd(instance, cmd);
1984 
1985         return retval;
1986 }
1987 
1988 static int megasas_get_ld_vf_affiliation_12(struct megasas_instance *instance,
1989                                             int initial)
1990 {
1991         struct megasas_cmd *cmd;
1992         struct megasas_dcmd_frame *dcmd;
1993         struct MR_LD_VF_AFFILIATION *new_affiliation = NULL;
1994         struct MR_LD_VF_MAP *newmap = NULL, *savedmap = NULL;
1995         dma_addr_t new_affiliation_h;
1996         int i, j, retval = 0, found = 0, doscan = 0;
1997         u8 thisVf;
1998 
1999         cmd = megasas_get_cmd(instance);
2000 
2001         if (!cmd) {
2002                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation12: "
2003                        "Failed to get cmd for scsi%d.\n",
2004                        instance->host->host_no);
2005                 return -ENOMEM;
2006         }
2007 
2008         dcmd = &cmd->frame->dcmd;
2009 
2010         if (!instance->vf_affiliation) {
2011                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
2012                        "affiliation for scsi%d.\n", instance->host->host_no);
2013                 megasas_return_cmd(instance, cmd);
2014                 return -ENOMEM;
2015         }
2016 
2017         if (initial)
2018                 memset(instance->vf_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
2019                        sizeof(struct MR_LD_VF_AFFILIATION));
2020         else {
2021                 new_affiliation =
2022                         pci_alloc_consistent(instance->pdev,
2023                                              (MAX_LOGICAL_DRIVES + 1) *
2024                                              sizeof(struct MR_LD_VF_AFFILIATION),
2025                                              &new_affiliation_h);
2026                 if (!new_affiliation) {
2027                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
2028                                "memory for new affiliation for scsi%d.\n",
2029                                instance->host->host_no);
2030                         megasas_return_cmd(instance, cmd);
2031                         return -ENOMEM;
2032                 }
2033                 memset(new_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
2034                        sizeof(struct MR_LD_VF_AFFILIATION));
2035         }
2036 
2037         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2038 
2039         dcmd->cmd = MFI_CMD_DCMD;
2040         dcmd->cmd_status = 0xFF;
2041         dcmd->sge_count = 1;
2042         dcmd->flags = MFI_FRAME_DIR_BOTH;
2043         dcmd->timeout = 0;
2044         dcmd->pad_0 = 0;
2045         dcmd->data_xfer_len = (MAX_LOGICAL_DRIVES + 1) *
2046                 sizeof(struct MR_LD_VF_AFFILIATION);
2047         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS;
2048 
2049         if (initial)
2050                 dcmd->sgl.sge32[0].phys_addr = instance->vf_affiliation_h;
2051         else
2052                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_h;
2053 
2054         dcmd->sgl.sge32[0].length = (MAX_LOGICAL_DRIVES + 1) *
2055                 sizeof(struct MR_LD_VF_AFFILIATION);
2056 
2057         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
2058                "scsi%d\n", instance->host->host_no);
2059 
2060         megasas_issue_blocked_cmd(instance, cmd, 0);
2061 
2062         if (dcmd->cmd_status) {
2063                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
2064                        " failed with status 0x%x for scsi%d.\n",
2065                        dcmd->cmd_status, instance->host->host_no);
2066                 retval = 1; /* Do a scan if we couldn't get affiliation */
2067                 goto out;
2068         }
2069 
2070         if (!initial) {
2071                 if (!new_affiliation->ldCount) {
2072                         printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2073                                "affiliation for passive path for scsi%d.\n",
2074                                instance->host->host_no);
2075                         retval = 1;
2076                         goto out;
2077                 }
2078                 newmap = new_affiliation->map;
2079                 savedmap = instance->vf_affiliation->map;
2080                 thisVf = new_affiliation->thisVf;
2081                 for (i = 0 ; i < new_affiliation->ldCount; i++) {
2082                         found = 0;
2083                         for (j = 0; j < instance->vf_affiliation->ldCount;
2084                              j++) {
2085                                 if (newmap->ref.targetId ==
2086                                     savedmap->ref.targetId) {
2087                                         found = 1;
2088                                         if (newmap->policy[thisVf] !=
2089                                             savedmap->policy[thisVf]) {
2090                                                 doscan = 1;
2091                                                 goto out;
2092                                         }
2093                                 }
2094                                 savedmap = (struct MR_LD_VF_MAP *)
2095                                         ((unsigned char *)savedmap +
2096                                          savedmap->size);
2097                         }
2098                         if (!found && newmap->policy[thisVf] !=
2099                             MR_LD_ACCESS_HIDDEN) {
2100                                 doscan = 1;
2101                                 goto out;
2102                         }
2103                         newmap = (struct MR_LD_VF_MAP *)
2104                                 ((unsigned char *)newmap + newmap->size);
2105                 }
2106 
2107                 newmap = new_affiliation->map;
2108                 savedmap = instance->vf_affiliation->map;
2109 
2110                 for (i = 0 ; i < instance->vf_affiliation->ldCount; i++) {
2111                         found = 0;
2112                         for (j = 0 ; j < new_affiliation->ldCount; j++) {
2113                                 if (savedmap->ref.targetId ==
2114                                     newmap->ref.targetId) {
2115                                         found = 1;
2116                                         if (savedmap->policy[thisVf] !=
2117                                             newmap->policy[thisVf]) {
2118                                                 doscan = 1;
2119                                                 goto out;
2120                                         }
2121                                 }
2122                                 newmap = (struct MR_LD_VF_MAP *)
2123                                         ((unsigned char *)newmap +
2124                                          newmap->size);
2125                         }
2126                         if (!found && savedmap->policy[thisVf] !=
2127                             MR_LD_ACCESS_HIDDEN) {
2128                                 doscan = 1;
2129                                 goto out;
2130                         }
2131                         savedmap = (struct MR_LD_VF_MAP *)
2132                                 ((unsigned char *)savedmap +
2133                                  savedmap->size);
2134                 }
2135         }
2136 out:
2137         if (doscan) {
2138                 printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2139                        "affiliation for scsi%d.\n", instance->host->host_no);
2140                 memcpy(instance->vf_affiliation, new_affiliation,
2141                        new_affiliation->size);
2142                 retval = 1;
2143         }
2144 
2145         if (new_affiliation)
2146                 pci_free_consistent(instance->pdev,
2147                                     (MAX_LOGICAL_DRIVES + 1) *
2148                                     sizeof(struct MR_LD_VF_AFFILIATION),
2149                                     new_affiliation, new_affiliation_h);
2150         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2151                 megasas_return_mfi_mpt_pthr(instance, cmd,
2152                         cmd->mpt_pthr_cmd_blocked);
2153         else
2154                 megasas_return_cmd(instance, cmd);
2155 
2156         return retval;
2157 }
2158 
2159 /* This function will get the current SR-IOV LD/VF affiliation */
2160 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
2161         int initial)
2162 {
2163         int retval;
2164 
2165         if (instance->PlasmaFW111)
2166                 retval = megasas_get_ld_vf_affiliation_111(instance, initial);
2167         else
2168                 retval = megasas_get_ld_vf_affiliation_12(instance, initial);
2169         return retval;
2170 }
2171 
2172 /* This function will tell FW to start the SR-IOV heartbeat */
2173 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
2174                                          int initial)
2175 {
2176         struct megasas_cmd *cmd;
2177         struct megasas_dcmd_frame *dcmd;
2178         int retval = 0;
2179 
2180         cmd = megasas_get_cmd(instance);
2181 
2182         if (!cmd) {
2183                 printk(KERN_DEBUG "megasas: megasas_sriov_start_heartbeat: "
2184                        "Failed to get cmd for scsi%d.\n",
2185                        instance->host->host_no);
2186                 return -ENOMEM;
2187         }
2188 
2189         dcmd = &cmd->frame->dcmd;
2190 
2191         if (initial) {
2192                 instance->hb_host_mem =
2193                         pci_zalloc_consistent(instance->pdev,
2194                                               sizeof(struct MR_CTRL_HB_HOST_MEM),
2195                                               &instance->hb_host_mem_h);
2196                 if (!instance->hb_host_mem) {
2197                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate"
2198                                " memory for heartbeat host memory for "
2199                                "scsi%d.\n", instance->host->host_no);
2200                         retval = -ENOMEM;
2201                         goto out;
2202                 }
2203         }
2204 
2205         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2206 
2207         dcmd->mbox.s[0] = sizeof(struct MR_CTRL_HB_HOST_MEM);
2208         dcmd->cmd = MFI_CMD_DCMD;
2209         dcmd->cmd_status = 0xFF;
2210         dcmd->sge_count = 1;
2211         dcmd->flags = MFI_FRAME_DIR_BOTH;
2212         dcmd->timeout = 0;
2213         dcmd->pad_0 = 0;
2214         dcmd->data_xfer_len = sizeof(struct MR_CTRL_HB_HOST_MEM);
2215         dcmd->opcode = MR_DCMD_CTRL_SHARED_HOST_MEM_ALLOC;
2216         dcmd->sgl.sge32[0].phys_addr = instance->hb_host_mem_h;
2217         dcmd->sgl.sge32[0].length = sizeof(struct MR_CTRL_HB_HOST_MEM);
2218 
2219         printk(KERN_WARNING "megasas: SR-IOV: Starting heartbeat for scsi%d\n",
2220                instance->host->host_no);
2221 
2222         if (!megasas_issue_polled(instance, cmd)) {
2223                 retval = 0;
2224         } else {
2225                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2226                        "_MEM_ALLOC DCMD timed out for scsi%d\n",
2227                        instance->host->host_no);
2228                 retval = 1;
2229                 goto out;
2230         }
2231 
2232 
2233         if (dcmd->cmd_status) {
2234                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2235                        "_MEM_ALLOC DCMD failed with status 0x%x for scsi%d\n",
2236                        dcmd->cmd_status,
2237                        instance->host->host_no);
2238                 retval = 1;
2239                 goto out;
2240         }
2241 
2242 out:
2243         megasas_return_cmd(instance, cmd);
2244 
2245         return retval;
2246 }
2247 
2248 /* Handler for SR-IOV heartbeat */
2249 void megasas_sriov_heartbeat_handler(unsigned long instance_addr)
2250 {
2251         struct megasas_instance *instance =
2252                 (struct megasas_instance *)instance_addr;
2253 
2254         if (instance->hb_host_mem->HB.fwCounter !=
2255             instance->hb_host_mem->HB.driverCounter) {
2256                 instance->hb_host_mem->HB.driverCounter =
2257                         instance->hb_host_mem->HB.fwCounter;
2258                 mod_timer(&instance->sriov_heartbeat_timer,
2259                           jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2260         } else {
2261                 printk(KERN_WARNING "megasas: SR-IOV: Heartbeat never "
2262                        "completed for scsi%d\n", instance->host->host_no);
2263                 schedule_work(&instance->work_init);
2264         }
2265 }
2266 
2267 /**
2268  * megasas_wait_for_outstanding -       Wait for all outstanding cmds
2269  * @instance:                           Adapter soft state
2270  *
2271  * This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
2272  * complete all its outstanding commands. Returns error if one or more IOs
2273  * are pending after this time period. It also marks the controller dead.
2274  */
2275 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
2276 {
2277         int i;
2278         u32 reset_index;
2279         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
2280         u8 adprecovery;
2281         unsigned long flags;
2282         struct list_head clist_local;
2283         struct megasas_cmd *reset_cmd;
2284         u32 fw_state;
2285         u8 kill_adapter_flag;
2286 
2287         spin_lock_irqsave(&instance->hba_lock, flags);
2288         adprecovery = instance->adprecovery;
2289         spin_unlock_irqrestore(&instance->hba_lock, flags);
2290 
2291         if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2292 
2293                 INIT_LIST_HEAD(&clist_local);
2294                 spin_lock_irqsave(&instance->hba_lock, flags);
2295                 list_splice_init(&instance->internal_reset_pending_q,
2296                                 &clist_local);
2297                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2298 
2299                 printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
2300                 for (i = 0; i < wait_time; i++) {
2301                         msleep(1000);
2302                         spin_lock_irqsave(&instance->hba_lock, flags);
2303                         adprecovery = instance->adprecovery;
2304                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2305                         if (adprecovery == MEGASAS_HBA_OPERATIONAL)
2306                                 break;
2307                 }
2308 
2309                 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2310                         printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
2311                         spin_lock_irqsave(&instance->hba_lock, flags);
2312                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2313                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2314                         return FAILED;
2315                 }
2316 
2317                 reset_index     = 0;
2318                 while (!list_empty(&clist_local)) {
2319                         reset_cmd       = list_entry((&clist_local)->next,
2320                                                 struct megasas_cmd, list);
2321                         list_del_init(&reset_cmd->list);
2322                         if (reset_cmd->scmd) {
2323                                 reset_cmd->scmd->result = DID_RESET << 16;
2324                                 printk(KERN_NOTICE "%d:%p reset [%02x]\n",
2325                                         reset_index, reset_cmd,
2326                                         reset_cmd->scmd->cmnd[0]);
2327 
2328                                 reset_cmd->scmd->scsi_done(reset_cmd->scmd);
2329                                 megasas_return_cmd(instance, reset_cmd);
2330                         } else if (reset_cmd->sync_cmd) {
2331                                 printk(KERN_NOTICE "megasas:%p synch cmds"
2332                                                 "reset queue\n",
2333                                                 reset_cmd);
2334 
2335                                 reset_cmd->cmd_status = ENODATA;
2336                                 instance->instancet->fire_cmd(instance,
2337                                                 reset_cmd->frame_phys_addr,
2338                                                 0, instance->reg_set);
2339                         } else {
2340                                 printk(KERN_NOTICE "megasas: %p unexpected"
2341                                         "cmds lst\n",
2342                                         reset_cmd);
2343                         }
2344                         reset_index++;
2345                 }
2346 
2347                 return SUCCESS;
2348         }
2349 
2350         for (i = 0; i < resetwaittime; i++) {
2351 
2352                 int outstanding = atomic_read(&instance->fw_outstanding);
2353 
2354                 if (!outstanding)
2355                         break;
2356 
2357                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2358                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2359                                "commands to complete\n",i,outstanding);
2360                         /*
2361                          * Call cmd completion routine. Cmd to be
2362                          * be completed directly without depending on isr.
2363                          */
2364                         megasas_complete_cmd_dpc((unsigned long)instance);
2365                 }
2366 
2367                 msleep(1000);
2368         }
2369 
2370         i = 0;
2371         kill_adapter_flag = 0;
2372         do {
2373                 fw_state = instance->instancet->read_fw_status_reg(
2374                                         instance->reg_set) & MFI_STATE_MASK;
2375                 if ((fw_state == MFI_STATE_FAULT) &&
2376                         (instance->disableOnlineCtrlReset == 0)) {
2377                         if (i == 3) {
2378                                 kill_adapter_flag = 2;
2379                                 break;
2380                         }
2381                         megasas_do_ocr(instance);
2382                         kill_adapter_flag = 1;
2383 
2384                         /* wait for 1 secs to let FW finish the pending cmds */
2385                         msleep(1000);
2386                 }
2387                 i++;
2388         } while (i <= 3);
2389 
2390         if (atomic_read(&instance->fw_outstanding) &&
2391                                         !kill_adapter_flag) {
2392                 if (instance->disableOnlineCtrlReset == 0) {
2393 
2394                         megasas_do_ocr(instance);
2395 
2396                         /* wait for 5 secs to let FW finish the pending cmds */
2397                         for (i = 0; i < wait_time; i++) {
2398                                 int outstanding =
2399                                         atomic_read(&instance->fw_outstanding);
2400                                 if (!outstanding)
2401                                         return SUCCESS;
2402                                 msleep(1000);
2403                         }
2404                 }
2405         }
2406 
2407         if (atomic_read(&instance->fw_outstanding) ||
2408                                         (kill_adapter_flag == 2)) {
2409                 printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
2410                 /*
2411                 * Send signal to FW to stop processing any pending cmds.
2412                 * The controller will be taken offline by the OS now.
2413                 */
2414                 if ((instance->pdev->device ==
2415                         PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2416                         (instance->pdev->device ==
2417                         PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
2418                         writel(MFI_STOP_ADP,
2419                                 &instance->reg_set->doorbell);
2420                 } else {
2421                         writel(MFI_STOP_ADP,
2422                                 &instance->reg_set->inbound_doorbell);
2423                 }
2424                 megasas_dump_pending_frames(instance);
2425                 spin_lock_irqsave(&instance->hba_lock, flags);
2426                 instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2427                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2428                 return FAILED;
2429         }
2430 
2431         printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
2432 
2433         return SUCCESS;
2434 }
2435 
2436 /**
2437  * megasas_generic_reset -      Generic reset routine
2438  * @scmd:                       Mid-layer SCSI command
2439  *
2440  * This routine implements a generic reset handler for device, bus and host
2441  * reset requests. Device, bus and host specific reset handlers can use this
2442  * function after they do their specific tasks.
2443  */
2444 static int megasas_generic_reset(struct scsi_cmnd *scmd)
2445 {
2446         int ret_val;
2447         struct megasas_instance *instance;
2448 
2449         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2450 
2451         scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
2452                  scmd->cmnd[0], scmd->retries);
2453 
2454         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2455                 printk(KERN_ERR "megasas: cannot recover from previous reset "
2456                        "failures\n");
2457                 return FAILED;
2458         }
2459 
2460         ret_val = megasas_wait_for_outstanding(instance);
2461         if (ret_val == SUCCESS)
2462                 printk(KERN_NOTICE "megasas: reset successful \n");
2463         else
2464                 printk(KERN_ERR "megasas: failed to do reset\n");
2465 
2466         return ret_val;
2467 }
2468 
2469 /**
2470  * megasas_reset_timer - quiesce the adapter if required
2471  * @scmd:               scsi cmnd
2472  *
2473  * Sets the FW busy flag and reduces the host->can_queue if the
2474  * cmd has not been completed within the timeout period.
2475  */
2476 static enum
2477 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
2478 {
2479         struct megasas_instance *instance;
2480         unsigned long flags;
2481 
2482         if (time_after(jiffies, scmd->jiffies_at_alloc +
2483                                 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
2484                 return BLK_EH_NOT_HANDLED;
2485         }
2486 
2487         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2488         if (!(instance->flag & MEGASAS_FW_BUSY)) {
2489                 /* FW is busy, throttle IO */
2490                 spin_lock_irqsave(instance->host->host_lock, flags);
2491 
2492                 instance->host->can_queue = instance->throttlequeuedepth;
2493                 instance->last_time = jiffies;
2494                 instance->flag |= MEGASAS_FW_BUSY;
2495 
2496                 spin_unlock_irqrestore(instance->host->host_lock, flags);
2497         }
2498         return BLK_EH_RESET_TIMER;
2499 }
2500 
2501 /**
2502  * megasas_reset_device -       Device reset handler entry point
2503  */
2504 static int megasas_reset_device(struct scsi_cmnd *scmd)
2505 {
2506         int ret;
2507 
2508         /*
2509          * First wait for all commands to complete
2510          */
2511         ret = megasas_generic_reset(scmd);
2512 
2513         return ret;
2514 }
2515 
2516 /**
2517  * megasas_reset_bus_host -     Bus & host reset handler entry point
2518  */
2519 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
2520 {
2521         int ret;
2522         struct megasas_instance *instance;
2523         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2524 
2525         /*
2526          * First wait for all commands to complete
2527          */
2528         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
2529             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
2530             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2531             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
2532                 ret = megasas_reset_fusion(scmd->device->host, 1);
2533         else
2534                 ret = megasas_generic_reset(scmd);
2535 
2536         return ret;
2537 }
2538 
2539 /**
2540  * megasas_bios_param - Returns disk geometry for a disk
2541  * @sdev:               device handle
2542  * @bdev:               block device
2543  * @capacity:           drive capacity
2544  * @geom:               geometry parameters
2545  */
2546 static int
2547 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2548                  sector_t capacity, int geom[])
2549 {
2550         int heads;
2551         int sectors;
2552         sector_t cylinders;
2553         unsigned long tmp;
2554         /* Default heads (64) & sectors (32) */
2555         heads = 64;
2556         sectors = 32;
2557 
2558         tmp = heads * sectors;
2559         cylinders = capacity;
2560 
2561         sector_div(cylinders, tmp);
2562 
2563         /*
2564          * Handle extended translation size for logical drives > 1Gb
2565          */
2566 
2567         if (capacity >= 0x200000) {
2568                 heads = 255;
2569                 sectors = 63;
2570                 tmp = heads*sectors;
2571                 cylinders = capacity;
2572                 sector_div(cylinders, tmp);
2573         }
2574 
2575         geom[0] = heads;
2576         geom[1] = sectors;
2577         geom[2] = cylinders;
2578 
2579         return 0;
2580 }
2581 
2582 static void megasas_aen_polling(struct work_struct *work);
2583 
2584 /**
2585  * megasas_service_aen -        Processes an event notification
2586  * @instance:                   Adapter soft state
2587  * @cmd:                        AEN command completed by the ISR
2588  *
2589  * For AEN, driver sends a command down to FW that is held by the FW till an
2590  * event occurs. When an event of interest occurs, FW completes the command
2591  * that it was previously holding.
2592  *
2593  * This routines sends SIGIO signal to processes that have registered with the
2594  * driver for AEN.
2595  */
2596 static void
2597 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2598 {
2599         unsigned long flags;
2600         /*
2601          * Don't signal app if it is just an aborted previously registered aen
2602          */
2603         if ((!cmd->abort_aen) && (instance->unload == 0)) {
2604                 spin_lock_irqsave(&poll_aen_lock, flags);
2605                 megasas_poll_wait_aen = 1;
2606                 spin_unlock_irqrestore(&poll_aen_lock, flags);
2607                 wake_up(&megasas_poll_wait);
2608                 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2609         }
2610         else
2611                 cmd->abort_aen = 0;
2612 
2613         instance->aen_cmd = NULL;
2614 
2615         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2616                 megasas_return_mfi_mpt_pthr(instance, cmd,
2617                         cmd->mpt_pthr_cmd_blocked);
2618         else
2619                 megasas_return_cmd(instance, cmd);
2620 
2621         if ((instance->unload == 0) &&
2622                 ((instance->issuepend_done == 1))) {
2623                 struct megasas_aen_event *ev;
2624                 ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2625                 if (!ev) {
2626                         printk(KERN_ERR "megasas_service_aen: out of memory\n");
2627                 } else {
2628                         ev->instance = instance;
2629                         instance->ev = ev;
2630                         INIT_DELAYED_WORK(&ev->hotplug_work,
2631                                           megasas_aen_polling);
2632                         schedule_delayed_work(&ev->hotplug_work, 0);
2633                 }
2634         }
2635 }
2636 
2637 static ssize_t
2638 megasas_fw_crash_buffer_store(struct device *cdev,
2639         struct device_attribute *attr, const char *buf, size_t count)
2640 {
2641         struct Scsi_Host *shost = class_to_shost(cdev);
2642         struct megasas_instance *instance =
2643                 (struct megasas_instance *) shost->hostdata;
2644         int val = 0;
2645         unsigned long flags;
2646 
2647         if (kstrtoint(buf, 0, &val) != 0)
2648                 return -EINVAL;
2649 
2650         spin_lock_irqsave(&instance->crashdump_lock, flags);
2651         instance->fw_crash_buffer_offset = val;
2652         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2653         return strlen(buf);
2654 }
2655 
2656 static ssize_t
2657 megasas_fw_crash_buffer_show(struct device *cdev,
2658         struct device_attribute *attr, char *buf)
2659 {
2660         struct Scsi_Host *shost = class_to_shost(cdev);
2661         struct megasas_instance *instance =
2662                 (struct megasas_instance *) shost->hostdata;
2663         u32 size;
2664         unsigned long buff_addr;
2665         unsigned long dmachunk = CRASH_DMA_BUF_SIZE;
2666         unsigned long src_addr;
2667         unsigned long flags;
2668         u32 buff_offset;
2669 
2670         spin_lock_irqsave(&instance->crashdump_lock, flags);
2671         buff_offset = instance->fw_crash_buffer_offset;
2672         if (!instance->crash_dump_buf &&
2673                 !((instance->fw_crash_state == AVAILABLE) ||
2674                 (instance->fw_crash_state == COPYING))) {
2675                 dev_err(&instance->pdev->dev,
2676                         "Firmware crash dump is not available\n");
2677                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2678                 return -EINVAL;
2679         }
2680 
2681         buff_addr = (unsigned long) buf;
2682 
2683         if (buff_offset >
2684                 (instance->fw_crash_buffer_size * dmachunk)) {
2685                 dev_err(&instance->pdev->dev,
2686                         "Firmware crash dump offset is out of range\n");
2687                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2688                 return 0;
2689         }
2690 
2691         size = (instance->fw_crash_buffer_size * dmachunk) - buff_offset;
2692         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
2693 
2694         src_addr = (unsigned long)instance->crash_buf[buff_offset / dmachunk] +
2695                 (buff_offset % dmachunk);
2696         memcpy(buf, (void *)src_addr,  size);
2697         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2698 
2699         return size;
2700 }
2701 
2702 static ssize_t
2703 megasas_fw_crash_buffer_size_show(struct device *cdev,
2704         struct device_attribute *attr, char *buf)
2705 {
2706         struct Scsi_Host *shost = class_to_shost(cdev);
2707         struct megasas_instance *instance =
2708                 (struct megasas_instance *) shost->hostdata;
2709 
2710         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)
2711                 ((instance->fw_crash_buffer_size) * 1024 * 1024)/PAGE_SIZE);
2712 }
2713 
2714 static ssize_t
2715 megasas_fw_crash_state_store(struct device *cdev,
2716         struct device_attribute *attr, const char *buf, size_t count)
2717 {
2718         struct Scsi_Host *shost = class_to_shost(cdev);
2719         struct megasas_instance *instance =
2720                 (struct megasas_instance *) shost->hostdata;
2721         int val = 0;
2722         unsigned long flags;
2723 
2724         if (kstrtoint(buf, 0, &val) != 0)
2725                 return -EINVAL;
2726 
2727         if ((val <= AVAILABLE || val > COPY_ERROR)) {
2728                 dev_err(&instance->pdev->dev, "application updates invalid "
2729                         "firmware crash state\n");
2730                 return -EINVAL;
2731         }
2732 
2733         instance->fw_crash_state = val;
2734 
2735         if ((val == COPIED) || (val == COPY_ERROR)) {
2736                 spin_lock_irqsave(&instance->crashdump_lock, flags);
2737                 megasas_free_host_crash_buffer(instance);
2738                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2739                 if (val == COPY_ERROR)
2740                         dev_info(&instance->pdev->dev, "application failed to "
2741                                 "copy Firmware crash dump\n");
2742                 else
2743                         dev_info(&instance->pdev->dev, "Firmware crash dump "
2744                                 "copied successfully\n");
2745         }
2746         return strlen(buf);
2747 }
2748 
2749 static ssize_t
2750 megasas_fw_crash_state_show(struct device *cdev,
2751         struct device_attribute *attr, char *buf)
2752 {
2753         struct Scsi_Host *shost = class_to_shost(cdev);
2754         struct megasas_instance *instance =
2755                 (struct megasas_instance *) shost->hostdata;
2756         return snprintf(buf, PAGE_SIZE, "%d\n", instance->fw_crash_state);
2757 }
2758 
2759 static ssize_t
2760 megasas_page_size_show(struct device *cdev,
2761         struct device_attribute *attr, char *buf)
2762 {
2763         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)PAGE_SIZE - 1);
2764 }
2765 
2766 static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR,
2767         megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store);
2768 static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO,
2769         megasas_fw_crash_buffer_size_show, NULL);
2770 static DEVICE_ATTR(fw_crash_state, S_IRUGO | S_IWUSR,
2771         megasas_fw_crash_state_show, megasas_fw_crash_state_store);
2772 static DEVICE_ATTR(page_size, S_IRUGO,
2773         megasas_page_size_show, NULL);
2774 
2775 struct device_attribute *megaraid_host_attrs[] = {
2776         &dev_attr_fw_crash_buffer_size,
2777         &dev_attr_fw_crash_buffer,
2778         &dev_attr_fw_crash_state,
2779         &dev_attr_page_size,
2780         NULL,
2781 };
2782 
2783 /*
2784  * Scsi host template for megaraid_sas driver
2785  */
2786 static struct scsi_host_template megasas_template = {
2787 
2788         .module = THIS_MODULE,
2789         .name = "LSI SAS based MegaRAID driver",
2790         .proc_name = "megaraid_sas",
2791         .slave_configure = megasas_slave_configure,
2792         .slave_alloc = megasas_slave_alloc,
2793         .queuecommand = megasas_queue_command,
2794         .eh_device_reset_handler = megasas_reset_device,
2795         .eh_bus_reset_handler = megasas_reset_bus_host,
2796         .eh_host_reset_handler = megasas_reset_bus_host,
2797         .eh_timed_out = megasas_reset_timer,
2798         .shost_attrs = megaraid_host_attrs,
2799         .bios_param = megasas_bios_param,
2800         .use_clustering = ENABLE_CLUSTERING,
2801         .change_queue_depth = scsi_change_queue_depth,
2802         .no_write_same = 1,
2803 };
2804 
2805 /**
2806  * megasas_complete_int_cmd -   Completes an internal command
2807  * @instance:                   Adapter soft state
2808  * @cmd:                        Command to be completed
2809  *
2810  * The megasas_issue_blocked_cmd() function waits for a command to complete
2811  * after it issues a command. This function wakes up that waiting routine by
2812  * calling wake_up() on the wait queue.
2813  */
2814 static void
2815 megasas_complete_int_cmd(struct megasas_instance *instance,
2816                          struct megasas_cmd *cmd)
2817 {
2818         cmd->cmd_status = cmd->frame->io.cmd_status;
2819 
2820         if (cmd->cmd_status == ENODATA) {
2821                 cmd->cmd_status = 0;
2822         }
2823         wake_up(&instance->int_cmd_wait_q);
2824 }
2825 
2826 /**
2827  * megasas_complete_abort -     Completes aborting a command
2828  * @instance:                   Adapter soft state
2829  * @cmd:                        Cmd that was issued to abort another cmd
2830  *
2831  * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2832  * after it issues an abort on a previously issued command. This function
2833  * wakes up all functions waiting on the same wait queue.
2834  */
2835 static void
2836 megasas_complete_abort(struct megasas_instance *instance,
2837                        struct megasas_cmd *cmd)
2838 {
2839         if (cmd->sync_cmd) {
2840                 cmd->sync_cmd = 0;
2841                 cmd->cmd_status = 0;
2842                 wake_up(&instance->abort_cmd_wait_q);
2843         }
2844 
2845         return;
2846 }
2847 
2848 /**
2849  * megasas_complete_cmd -       Completes a command
2850  * @instance:                   Adapter soft state
2851  * @cmd:                        Command to be completed
2852  * @alt_status:                 If non-zero, use this value as status to
2853  *                              SCSI mid-layer instead of the value returned
2854  *                              by the FW. This should be used if caller wants
2855  *                              an alternate status (as in the case of aborted
2856  *                              commands)
2857  */
2858 void
2859 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2860                      u8 alt_status)
2861 {
2862         int exception = 0;
2863         struct megasas_header *hdr = &cmd->frame->hdr;
2864         unsigned long flags;
2865         struct fusion_context *fusion = instance->ctrl_context;
2866         u32 opcode;
2867 
2868         /* flag for the retry reset */
2869         cmd->retry_for_fw_reset = 0;
2870 
2871         if (cmd->scmd)
2872                 cmd->scmd->SCp.ptr = NULL;
2873 
2874         switch (hdr->cmd) {
2875         case MFI_CMD_INVALID:
2876                 /* Some older 1068 controller FW may keep a pended
2877                    MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
2878                    when booting the kdump kernel.  Ignore this command to
2879                    prevent a kernel panic on shutdown of the kdump kernel. */
2880                 printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command "
2881                        "completed.\n");
2882                 printk(KERN_WARNING "megaraid_sas: If you have a controller "
2883                        "other than PERC5, please upgrade your firmware.\n");
2884                 break;
2885         case MFI_CMD_PD_SCSI_IO:
2886         case MFI_CMD_LD_SCSI_IO:
2887 
2888                 /*
2889                  * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2890                  * issued either through an IO path or an IOCTL path. If it
2891                  * was via IOCTL, we will send it to internal completion.
2892                  */
2893                 if (cmd->sync_cmd) {
2894                         cmd->sync_cmd = 0;
2895                         megasas_complete_int_cmd(instance, cmd);
2896                         break;
2897                 }
2898 
2899         case MFI_CMD_LD_READ:
2900         case MFI_CMD_LD_WRITE:
2901 
2902                 if (alt_status) {
2903                         cmd->scmd->result = alt_status << 16;
2904                         exception = 1;
2905                 }
2906 
2907                 if (exception) {
2908 
2909                         atomic_dec(&instance->fw_outstanding);
2910 
2911                         scsi_dma_unmap(cmd->scmd);
2912                         cmd->scmd->scsi_done(cmd->scmd);
2913                         megasas_return_cmd(instance, cmd);
2914 
2915                         break;
2916                 }
2917 
2918                 switch (hdr->cmd_status) {
2919 
2920                 case MFI_STAT_OK:
2921                         cmd->scmd->result = DID_OK << 16;
2922                         break;
2923 
2924                 case MFI_STAT_SCSI_IO_FAILED:
2925                 case MFI_STAT_LD_INIT_IN_PROGRESS:
2926                         cmd->scmd->result =
2927                             (DID_ERROR << 16) | hdr->scsi_status;
2928                         break;
2929 
2930                 case MFI_STAT_SCSI_DONE_WITH_ERROR:
2931 
2932                         cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2933 
2934                         if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2935                                 memset(cmd->scmd->sense_buffer, 0,
2936                                        SCSI_SENSE_BUFFERSIZE);
2937                                 memcpy(cmd->scmd->sense_buffer, cmd->sense,
2938                                        hdr->sense_len);
2939 
2940                                 cmd->scmd->result |= DRIVER_SENSE << 24;
2941                         }
2942 
2943                         break;
2944 
2945                 case MFI_STAT_LD_OFFLINE:
2946                 case MFI_STAT_DEVICE_NOT_FOUND:
2947                         cmd->scmd->result = DID_BAD_TARGET << 16;
2948                         break;
2949 
2950                 default:
2951                         printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2952                                hdr->cmd_status);
2953                         cmd->scmd->result = DID_ERROR << 16;
2954                         break;
2955                 }
2956 
2957                 atomic_dec(&instance->fw_outstanding);
2958 
2959                 scsi_dma_unmap(cmd->scmd);
2960                 cmd->scmd->scsi_done(cmd->scmd);
2961                 megasas_return_cmd(instance, cmd);
2962 
2963                 break;
2964 
2965         case MFI_CMD_SMP:
2966         case MFI_CMD_STP:
2967         case MFI_CMD_DCMD:
2968                 opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
2969                 /* Check for LD map update */
2970                 if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
2971                         && (cmd->frame->dcmd.mbox.b[1] == 1)) {
2972                         fusion->fast_path_io = 0;
2973                         spin_lock_irqsave(instance->host->host_lock, flags);
2974                         if (cmd->frame->hdr.cmd_status != 0) {
2975                                 if (cmd->frame->hdr.cmd_status !=
2976                                     MFI_STAT_NOT_FOUND)
2977                                         printk(KERN_WARNING "megasas: map sync"
2978                                                "failed, status = 0x%x.\n",
2979                                                cmd->frame->hdr.cmd_status);
2980                                 else {
2981                                         megasas_return_mfi_mpt_pthr(instance,
2982                                                 cmd, cmd->mpt_pthr_cmd_blocked);
2983                                         spin_unlock_irqrestore(
2984                                                 instance->host->host_lock,
2985                                                 flags);
2986                                         break;
2987                                 }
2988                         } else
2989                                 instance->map_id++;
2990                         megasas_return_mfi_mpt_pthr(instance, cmd,
2991                                 cmd->mpt_pthr_cmd_blocked);
2992 
2993                         /*
2994                          * Set fast path IO to ZERO.
2995                          * Validate Map will set proper value.
2996                          * Meanwhile all IOs will go as LD IO.
2997                          */
2998                         if (MR_ValidateMapInfo(instance))
2999                                 fusion->fast_path_io = 1;
3000                         else
3001                                 fusion->fast_path_io = 0;
3002                         megasas_sync_map_info(instance);
3003                         spin_unlock_irqrestore(instance->host->host_lock,
3004                                                flags);
3005                         break;
3006                 }
3007                 if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
3008                     opcode == MR_DCMD_CTRL_EVENT_GET) {
3009                         spin_lock_irqsave(&poll_aen_lock, flags);
3010                         megasas_poll_wait_aen = 0;
3011                         spin_unlock_irqrestore(&poll_aen_lock, flags);
3012                 }
3013 
3014                 /*
3015                  * See if got an event notification
3016                  */
3017                 if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
3018                         megasas_service_aen(instance, cmd);
3019                 else
3020                         megasas_complete_int_cmd(instance, cmd);
3021 
3022                 break;
3023 
3024         case MFI_CMD_ABORT:
3025                 /*
3026                  * Cmd issued to abort another cmd returned
3027                  */
3028                 megasas_complete_abort(instance, cmd);
3029                 break;
3030 
3031         default:
3032                 printk("megasas: Unknown command completed! [0x%X]\n",
3033                        hdr->cmd);
3034                 break;
3035         }
3036 }
3037 
3038 /**
3039  * megasas_issue_pending_cmds_again -   issue all pending cmds
3040  *                                      in FW again because of the fw reset
3041  * @instance:                           Adapter soft state
3042  */
3043 static inline void
3044 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
3045 {
3046         struct megasas_cmd *cmd;
3047         struct list_head clist_local;
3048         union megasas_evt_class_locale class_locale;
3049         unsigned long flags;
3050         u32 seq_num;
3051 
3052         INIT_LIST_HEAD(&clist_local);
3053         spin_lock_irqsave(&instance->hba_lock, flags);
3054         list_splice_init(&instance->internal_reset_pending_q, &clist_local);
3055         spin_unlock_irqrestore(&instance->hba_lock, flags);
3056 
3057         while (!list_empty(&clist_local)) {
3058                 cmd     = list_entry((&clist_local)->next,
3059                                         struct megasas_cmd, list);
3060                 list_del_init(&cmd->list);
3061 
3062                 if (cmd->sync_cmd || cmd->scmd) {
3063                         printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
3064                                 "detected to be pending while HBA reset.\n",
3065                                         cmd, cmd->scmd, cmd->sync_cmd);
3066 
3067                         cmd->retry_for_fw_reset++;
3068 
3069                         if (cmd->retry_for_fw_reset == 3) {
3070                                 printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
3071                                         "was tried multiple times during reset."
3072                                         "Shutting down the HBA\n",
3073                                         cmd, cmd->scmd, cmd->sync_cmd);
3074                                 instance->instancet->disable_intr(instance);
3075                                 atomic_set(&instance->fw_reset_no_pci_access, 1);
3076                                 megaraid_sas_kill_hba(instance);
3077                                 return;
3078                         }
3079                 }
3080 
3081                 if (cmd->sync_cmd == 1) {
3082                         if (cmd->scmd) {
3083                                 printk(KERN_NOTICE "megaraid_sas: unexpected"
3084                                         "cmd attached to internal command!\n");
3085                         }
3086                         printk(KERN_NOTICE "megasas: %p synchronous cmd"
3087                                                 "on the internal reset queue,"
3088                                                 "issue it again.\n", cmd);
3089                         cmd->cmd_status = ENODATA;
3090                         instance->instancet->fire_cmd(instance,
3091                                                         cmd->frame_phys_addr ,
3092                                                         0, instance->reg_set);
3093                 } else if (cmd->scmd) {
3094                         printk(KERN_NOTICE "megasas: %p scsi cmd [%02x]"
3095                         "detected on the internal queue, issue again.\n",
3096                         cmd, cmd->scmd->cmnd[0]);
3097 
3098                         atomic_inc(&instance->fw_outstanding);
3099                         instance->instancet->fire_cmd(instance,
3100                                         cmd->frame_phys_addr,
3101                                         cmd->frame_count-1, instance->reg_set);
3102                 } else {
3103                         printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
3104                                 "internal reset defer list while re-issue!!\n",
3105                                 cmd);
3106                 }
3107         }
3108 
3109         if (instance->aen_cmd) {
3110                 printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
3111                 megasas_return_cmd(instance, instance->aen_cmd);
3112 
3113                 instance->aen_cmd       = NULL;
3114         }
3115 
3116         /*
3117         * Initiate AEN (Asynchronous Event Notification)
3118         */
3119         seq_num = instance->last_seq_num;
3120         class_locale.members.reserved = 0;
3121         class_locale.members.locale = MR_EVT_LOCALE_ALL;
3122         class_locale.members.class = MR_EVT_CLASS_DEBUG;
3123 
3124         megasas_register_aen(instance, seq_num, class_locale.word);
3125 }
3126 
3127 /**
3128  * Move the internal reset pending commands to a deferred queue.
3129  *
3130  * We move the commands pending at internal reset time to a
3131  * pending queue. This queue would be flushed after successful
3132  * completion of the internal reset sequence. if the internal reset
3133  * did not complete in time, the kernel reset handler would flush
3134  * these commands.
3135  **/
3136 static void
3137 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
3138 {
3139         struct megasas_cmd *cmd;
3140         int i;
3141         u32 max_cmd = instance->max_fw_cmds;
3142         u32 defer_index;
3143         unsigned long flags;
3144 
3145         defer_index     = 0;
3146         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
3147         for (i = 0; i < max_cmd; i++) {
3148                 cmd = instance->cmd_list[i];
3149                 if (cmd->sync_cmd == 1 || cmd->scmd) {
3150                         printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
3151                                         "on the defer queue as internal\n",
3152                                 defer_index, cmd, cmd->sync_cmd, cmd->scmd);
3153 
3154                         if (!list_empty(&cmd->list)) {
3155                                 printk(KERN_NOTICE "megaraid_sas: ERROR while"
3156                                         " moving this cmd:%p, %d %p, it was"
3157                                         "discovered on some list?\n",
3158                                         cmd, cmd->sync_cmd, cmd->scmd);
3159 
3160                                 list_del_init(&cmd->list);
3161                         }
3162                         defer_index++;
3163                         list_add_tail(&cmd->list,
3164                                 &instance->internal_reset_pending_q);
3165                 }
3166         }
3167         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
3168 }
3169 
3170 
3171 static void
3172 process_fw_state_change_wq(struct work_struct *work)
3173 {
3174         struct megasas_instance *instance =
3175                 container_of(work, struct megasas_instance, work_init);
3176         u32 wait;
3177         unsigned long flags;
3178 
3179         if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
3180                 printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
3181                                 instance->adprecovery);
3182                 return ;
3183         }
3184 
3185         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
3186                 printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
3187                                         "state, restarting it...\n");
3188 
3189                 instance->instancet->disable_intr(instance);
3190                 atomic_set(&instance->fw_outstanding, 0);
3191 
3192                 atomic_set(&instance->fw_reset_no_pci_access, 1);
3193                 instance->instancet->adp_reset(instance, instance->reg_set);
3194                 atomic_set(&instance->fw_reset_no_pci_access, 0 );
3195 
3196                 printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
3197                                         "initiating next stage...\n");
3198 
3199                 printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
3200                                         "state 2 starting...\n");
3201 
3202                 /*waitting for about 20 second before start the second init*/
3203                 for (wait = 0; wait < 30; wait++) {
3204                         msleep(1000);
3205                 }
3206 
3207                 if (megasas_transition_to_ready(instance, 1)) {
3208                         printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
3209 
3210                         atomic_set(&instance->fw_reset_no_pci_access, 1);
3211                         megaraid_sas_kill_hba(instance);
3212                         return ;
3213                 }
3214 
3215                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
3216                         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
3217                         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
3218                         ) {
3219                         *instance->consumer = *instance->producer;
3220                 } else {
3221                         *instance->consumer = 0;
3222                         *instance->producer = 0;
3223                 }
3224 
3225                 megasas_issue_init_mfi(instance);
3226 
3227                 spin_lock_irqsave(&instance->hba_lock, flags);
3228                 instance->adprecovery   = MEGASAS_HBA_OPERATIONAL;
3229                 spin_unlock_irqrestore(&instance->hba_lock, flags);
3230                 instance->instancet->enable_intr(instance);
3231 
3232                 megasas_issue_pending_cmds_again(instance);
3233                 instance->issuepend_done = 1;
3234         }
3235         return ;
3236 }
3237 
3238 /**
3239  * megasas_deplete_reply_queue -        Processes all completed commands
3240  * @instance:                           Adapter soft state
3241  * @alt_status:                         Alternate status to be returned to
3242  *                                      SCSI mid-layer instead of the status
3243  *                                      returned by the FW
3244  * Note: this must be called with hba lock held
3245  */
3246 static int
3247 megasas_deplete_reply_queue(struct megasas_instance *instance,
3248                                         u8 alt_status)
3249 {
3250         u32 mfiStatus;
3251         u32 fw_state;
3252 
3253         if ((mfiStatus = instance->instancet->check_reset(instance,
3254                                         instance->reg_set)) == 1) {
3255                 return IRQ_HANDLED;
3256         }
3257 
3258         if ((mfiStatus = instance->instancet->clear_intr(
3259                                                 instance->reg_set)
3260                                                 ) == 0) {
3261                 /* Hardware may not set outbound_intr_status in MSI-X mode */
3262                 if (!instance->msix_vectors)
3263                         return IRQ_NONE;
3264         }
3265 
3266         instance->mfiStatus = mfiStatus;
3267 
3268         if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
3269                 fw_state = instance->instancet->read_fw_status_reg(
3270                                 instance->reg_set) & MFI_STATE_MASK;
3271 
3272                 if (fw_state != MFI_STATE_FAULT) {
3273                         printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
3274                                                 fw_state);
3275                 }
3276 
3277                 if ((fw_state == MFI_STATE_FAULT) &&
3278                                 (instance->disableOnlineCtrlReset == 0)) {
3279                         printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
3280 
3281                         if ((instance->pdev->device ==
3282                                         PCI_DEVICE_ID_LSI_SAS1064R) ||
3283                                 (instance->pdev->device ==
3284                                         PCI_DEVICE_ID_DELL_PERC5) ||
3285                                 (instance->pdev->device ==
3286                                         PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
3287 
3288                                 *instance->consumer =
3289                                         cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
3290                         }
3291 
3292 
3293                         instance->instancet->disable_intr(instance);
3294                         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
3295                         instance->issuepend_done = 0;
3296 
3297                         atomic_set(&instance->fw_outstanding, 0);
3298                         megasas_internal_reset_defer_cmds(instance);
3299 
3300                         printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
3301                                         fw_state, instance->adprecovery);
3302 
3303                         schedule_work(&instance->work_init);
3304                         return IRQ_HANDLED;
3305 
3306                 } else {
3307                         printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
3308                                 fw_state, instance->disableOnlineCtrlReset);
3309                 }
3310         }
3311 
3312         tasklet_schedule(&instance->isr_tasklet);
3313         return IRQ_HANDLED;
3314 }
3315 /**
3316  * megasas_isr - isr entry point
3317  */
3318 static irqreturn_t megasas_isr(int irq, void *devp)
3319 {
3320         struct megasas_irq_context *irq_context = devp;
3321         struct megasas_instance *instance = irq_context->instance;
3322         unsigned long flags;
3323         irqreturn_t     rc;
3324 
3325         if (atomic_read(&instance->fw_reset_no_pci_access))
3326                 return IRQ_HANDLED;
3327 
3328         spin_lock_irqsave(&instance->hba_lock, flags);
3329         rc =  megasas_deplete_reply_queue(instance, DID_OK);
3330         spin_unlock_irqrestore(&instance->hba_lock, flags);
3331 
3332         return rc;
3333 }
3334 
3335 /**
3336  * megasas_transition_to_ready -        Move the FW to READY state
3337  * @instance:                           Adapter soft state
3338  *
3339  * During the initialization, FW passes can potentially be in any one of
3340  * several possible states. If the FW in operational, waiting-for-handshake
3341  * states, driver must take steps to bring it to ready state. Otherwise, it
3342  * has to wait for the ready state.
3343  */
3344 int
3345 megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
3346 {
3347         int i;
3348         u8 max_wait;
3349         u32 fw_state;
3350         u32 cur_state;
3351         u32 abs_state, curr_abs_state;
3352 
3353         abs_state = instance->instancet->read_fw_status_reg(instance->reg_set);
3354         fw_state = abs_state & MFI_STATE_MASK;
3355 
3356         if (fw_state != MFI_STATE_READY)
3357                 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
3358                        " state\n");
3359 
3360         while (fw_state != MFI_STATE_READY) {
3361 
3362                 switch (fw_state) {
3363 
3364                 case MFI_STATE_FAULT:
3365                         printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
3366                         if (ocr) {
3367                                 max_wait = MEGASAS_RESET_WAIT_TIME;
3368                                 cur_state = MFI_STATE_FAULT;
3369                                 break;
3370                         } else
3371                                 return -ENODEV;
3372 
3373                 case MFI_STATE_WAIT_HANDSHAKE:
3374                         /*
3375                          * Set the CLR bit in inbound doorbell
3376                          */
3377                         if ((instance->pdev->device ==
3378                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3379                                 (instance->pdev->device ==
3380                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3381                                 (instance->pdev->device ==
3382                                 PCI_DEVICE_ID_LSI_FUSION) ||
3383                                 (instance->pdev->device ==
3384                                 PCI_DEVICE_ID_LSI_PLASMA) ||
3385                                 (instance->pdev->device ==
3386                                 PCI_DEVICE_ID_LSI_INVADER) ||
3387                                 (instance->pdev->device ==
3388                                 PCI_DEVICE_ID_LSI_FURY)) {
3389                                 writel(
3390                                   MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3391                                   &instance->reg_set->doorbell);
3392                         } else {
3393                                 writel(
3394                                     MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3395                                         &instance->reg_set->inbound_doorbell);
3396                         }
3397 
3398                         max_wait = MEGASAS_RESET_WAIT_TIME;
3399                         cur_state = MFI_STATE_WAIT_HANDSHAKE;
3400                         break;
3401 
3402                 case MFI_STATE_BOOT_MESSAGE_PENDING:
3403                         if ((instance->pdev->device ==
3404                              PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3405                                 (instance->pdev->device ==
3406                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3407                             (instance->pdev->device ==
3408                              PCI_DEVICE_ID_LSI_FUSION) ||
3409                             (instance->pdev->device ==
3410                              PCI_DEVICE_ID_LSI_PLASMA) ||
3411                             (instance->pdev->device ==
3412                              PCI_DEVICE_ID_LSI_INVADER) ||
3413                             (instance->pdev->device ==
3414                              PCI_DEVICE_ID_LSI_FURY)) {
3415                                 writel(MFI_INIT_HOTPLUG,
3416                                        &instance->reg_set->doorbell);
3417                         } else
3418                                 writel(MFI_INIT_HOTPLUG,
3419                                         &instance->reg_set->inbound_doorbell);
3420 
3421                         max_wait = MEGASAS_RESET_WAIT_TIME;
3422                         cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
3423                         break;
3424 
3425                 case MFI_STATE_OPERATIONAL:
3426                         /*
3427                          * Bring it to READY state; assuming max wait 10 secs
3428                          */
3429                         instance->instancet->disable_intr(instance);
3430                         if ((instance->pdev->device ==
3431                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3432                                 (instance->pdev->device ==
3433                                 PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
3434                                 (instance->pdev->device
3435                                         == PCI_DEVICE_ID_LSI_FUSION) ||
3436                                 (instance->pdev->device
3437                                         == PCI_DEVICE_ID_LSI_PLASMA) ||
3438                                 (instance->pdev->device
3439                                         == PCI_DEVICE_ID_LSI_INVADER) ||
3440                                 (instance->pdev->device
3441                                         == PCI_DEVICE_ID_LSI_FURY)) {
3442                                 writel(MFI_RESET_FLAGS,
3443                                         &instance->reg_set->doorbell);
3444                                 if ((instance->pdev->device ==
3445                                         PCI_DEVICE_ID_LSI_FUSION) ||
3446                                         (instance->pdev->device ==
3447                                         PCI_DEVICE_ID_LSI_PLASMA) ||
3448                                         (instance->pdev->device ==
3449                                         PCI_DEVICE_ID_LSI_INVADER) ||
3450                                         (instance->pdev->device ==
3451                                         PCI_DEVICE_ID_LSI_FURY)) {
3452                                         for (i = 0; i < (10 * 1000); i += 20) {
3453                                                 if (readl(
3454                                                             &instance->
3455                                                             reg_set->
3456                                                             doorbell) & 1)
3457                                                         msleep(20);
3458                                                 else
3459                                                         break;
3460                                         }
3461                                 }
3462                         } else
3463                                 writel(MFI_RESET_FLAGS,
3464                                         &instance->reg_set->inbound_doorbell);
3465 
3466                         max_wait = MEGASAS_RESET_WAIT_TIME;
3467                         cur_state = MFI_STATE_OPERATIONAL;
3468                         break;
3469 
3470                 case MFI_STATE_UNDEFINED:
3471                         /*
3472                          * This state should not last for more than 2 seconds
3473                          */
3474                         max_wait = MEGASAS_RESET_WAIT_TIME;
3475                         cur_state = MFI_STATE_UNDEFINED;
3476                         break;
3477 
3478                 case MFI_STATE_BB_INIT:
3479                         max_wait = MEGASAS_RESET_WAIT_TIME;
3480                         cur_state = MFI_STATE_BB_INIT;
3481                         break;
3482 
3483                 case MFI_STATE_FW_INIT:
3484                         max_wait = MEGASAS_RESET_WAIT_TIME;
3485                         cur_state = MFI_STATE_FW_INIT;
3486                         break;
3487 
3488                 case MFI_STATE_FW_INIT_2:
3489                         max_wait = MEGASAS_RESET_WAIT_TIME;
3490                         cur_state = MFI_STATE_FW_INIT_2;
3491                         break;
3492 
3493                 case MFI_STATE_DEVICE_SCAN:
3494                         max_wait = MEGASAS_RESET_WAIT_TIME;
3495                         cur_state = MFI_STATE_DEVICE_SCAN;
3496                         break;
3497 
3498                 case MFI_STATE_FLUSH_CACHE:
3499                         max_wait = MEGASAS_RESET_WAIT_TIME;
3500                         cur_state = MFI_STATE_FLUSH_CACHE;
3501                         break;
3502 
3503                 default:
3504                         printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
3505                                fw_state);
3506                         return -ENODEV;
3507                 }
3508 
3509                 /*
3510                  * The cur_state should not last for more than max_wait secs
3511                  */
3512                 for (i = 0; i < (max_wait * 1000); i++) {
3513                         curr_abs_state = instance->instancet->
3514                                 read_fw_status_reg(instance->reg_set);
3515 
3516                         if (abs_state == curr_abs_state) {
3517                                 msleep(1);
3518                         } else
3519                                 break;
3520                 }
3521 
3522                 /*
3523                  * Return error if fw_state hasn't changed after max_wait
3524                  */
3525                 if (curr_abs_state == abs_state) {
3526                         printk(KERN_DEBUG "FW state [%d] hasn't changed "
3527                                "in %d secs\n", fw_state, max_wait);
3528                         return -ENODEV;
3529                 }
3530 
3531                 abs_state = curr_abs_state;
3532                 fw_state = curr_abs_state & MFI_STATE_MASK;
3533         }
3534         printk(KERN_INFO "megasas: FW now in Ready state\n");
3535 
3536         return 0;
3537 }
3538 
3539 /**
3540  * megasas_teardown_frame_pool -        Destroy the cmd frame DMA pool
3541  * @instance:                           Adapter soft state
3542  */
3543 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
3544 {
3545         int i;
3546         u32 max_cmd = instance->max_mfi_cmds;
3547         struct megasas_cmd *cmd;
3548 
3549         if (!instance->frame_dma_pool)
3550                 return;
3551 
3552         /*
3553          * Return all frames to pool
3554          */
3555         for (i = 0; i < max_cmd; i++) {
3556 
3557                 cmd = instance->cmd_list[i];
3558 
3559                 if (cmd->frame)
3560                         pci_pool_free(instance->frame_dma_pool, cmd->frame,
3561                                       cmd->frame_phys_addr);
3562 
3563                 if (cmd->sense)
3564                         pci_pool_free(instance->sense_dma_pool, cmd->sense,
3565                                       cmd->sense_phys_addr);
3566         }
3567 
3568         /*
3569          * Now destroy the pool itself
3570          */
3571         pci_pool_destroy(instance->frame_dma_pool);
3572         pci_pool_destroy(instance->sense_dma_pool);
3573 
3574         instance->frame_dma_pool = NULL;
3575         instance->sense_dma_pool = NULL;
3576 }
3577 
3578 /**
3579  * megasas_create_frame_pool -  Creates DMA pool for cmd frames
3580  * @instance:                   Adapter soft state
3581  *
3582  * Each command packet has an embedded DMA memory buffer that is used for
3583  * filling MFI frame and the SG list that immediately follows the frame. This
3584  * function creates those DMA memory buffers for each command packet by using
3585  * PCI pool facility.
3586  */
3587 static int megasas_create_frame_pool(struct megasas_instance *instance)
3588 {
3589         int i;
3590         u32 max_cmd;
3591         u32 sge_sz;
3592         u32 total_sz;
3593         u32 frame_count;
3594         struct megasas_cmd *cmd;
3595 
3596         max_cmd = instance->max_mfi_cmds;
3597 
3598         /*
3599          * Size of our frame is 64 bytes for MFI frame, followed by max SG
3600          * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
3601          */
3602         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
3603             sizeof(struct megasas_sge32);
3604 
3605         if (instance->flag_ieee) {
3606                 sge_sz = sizeof(struct megasas_sge_skinny);
3607         }
3608 
3609         /*
3610          * For MFI controllers.
3611          * max_num_sge = 60
3612          * max_sge_sz  = 16 byte (sizeof megasas_sge_skinny)
3613          * Total 960 byte (15 MFI frame of 64 byte)
3614          *
3615          * Fusion adapter require only 3 extra frame.
3616          * max_num_sge = 16 (defined as MAX_IOCTL_SGE)
3617          * max_sge_sz  = 12 byte (sizeof  megasas_sge64)
3618          * Total 192 byte (3 MFI frame of 64 byte)
3619          */
3620         frame_count = instance->ctrl_context ? (3 + 1) : (15 + 1);
3621         total_sz = MEGAMFI_FRAME_SIZE * frame_count;
3622         /*
3623          * Use DMA pool facility provided by PCI layer
3624          */
3625         instance->frame_dma_pool = pci_pool_create("megasas frame pool",
3626                                         instance->pdev, total_sz, 256, 0);
3627 
3628         if (!instance->frame_dma_pool) {
3629                 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
3630                 return -ENOMEM;
3631         }
3632 
3633         instance->sense_dma_pool = pci_pool_create("megasas sense pool",
3634                                                    instance->pdev, 128, 4, 0);
3635 
3636         if (!instance->sense_dma_pool) {
3637                 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
3638 
3639                 pci_pool_destroy(instance->frame_dma_pool);
3640                 instance->frame_dma_pool = NULL;
3641 
3642                 return -ENOMEM;
3643         }
3644 
3645         /*
3646          * Allocate and attach a frame to each of the commands in cmd_list.
3647          * By making cmd->index as the context instead of the &cmd, we can
3648          * always use 32bit context regardless of the architecture
3649          */
3650         for (i = 0; i < max_cmd; i++) {
3651 
3652                 cmd = instance->cmd_list[i];
3653 
3654                 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
3655                                             GFP_KERNEL, &cmd->frame_phys_addr);
3656 
3657                 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
3658                                             GFP_KERNEL, &cmd->sense_phys_addr);
3659 
3660                 /*
3661                  * megasas_teardown_frame_pool() takes care of freeing
3662                  * whatever has been allocated
3663                  */
3664                 if (!cmd->frame || !cmd->sense) {
3665                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
3666                         megasas_teardown_frame_pool(instance);
3667                         return -ENOMEM;
3668                 }
3669 
3670                 memset(cmd->frame, 0, total_sz);
3671                 cmd->frame->io.context = cpu_to_le32(cmd->index);
3672                 cmd->frame->io.pad_0 = 0;
3673                 if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
3674                     (instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
3675                     (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
3676                         (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
3677                     (reset_devices))
3678                         cmd->frame->hdr.cmd = MFI_CMD_INVALID;
3679         }
3680 
3681         return 0;
3682 }
3683 
3684 /**
3685  * megasas_free_cmds -  Free all the cmds in the free cmd pool
3686  * @instance:           Adapter soft state
3687  */
3688 void megasas_free_cmds(struct megasas_instance *instance)
3689 {
3690         int i;
3691         /* First free the MFI frame pool */
3692         megasas_teardown_frame_pool(instance);
3693 
3694         /* Free all the commands in the cmd_list */
3695         for (i = 0; i < instance->max_mfi_cmds; i++)
3696 
3697                 kfree(instance->cmd_list[i]);
3698 
3699         /* Free the cmd_list buffer itself */
3700         kfree(instance->cmd_list);
3701         instance->cmd_list = NULL;
3702 
3703         INIT_LIST_HEAD(&instance->cmd_pool);
3704 }
3705 
3706 /**
3707  * megasas_alloc_cmds - Allocates the command packets
3708  * @instance:           Adapter soft state
3709  *
3710  * Each command that is issued to the FW, whether IO commands from the OS or
3711  * internal commands like IOCTLs, are wrapped in local data structure called
3712  * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
3713  * the FW.
3714  *
3715  * Each frame has a 32-bit field called context (tag). This context is used
3716  * to get back the megasas_cmd from the frame when a frame gets completed in
3717  * the ISR. Typically the address of the megasas_cmd itself would be used as
3718  * the context. But we wanted to keep the differences between 32 and 64 bit
3719  * systems to the mininum. We always use 32 bit integers for the context. In
3720  * this driver, the 32 bit values are the indices into an array cmd_list.
3721  * This array is used only to look up the megasas_cmd given the context. The
3722  * free commands themselves are maintained in a linked list called cmd_pool.
3723  */
3724 int megasas_alloc_cmds(struct megasas_instance *instance)
3725 {
3726         int i;
3727         int j;
3728         u32 max_cmd;
3729         struct megasas_cmd *cmd;
3730         struct fusion_context *fusion;
3731 
3732         fusion = instance->ctrl_context;
3733         max_cmd = instance->max_mfi_cmds;
3734 
3735         /*
3736          * instance->cmd_list is an array of struct megasas_cmd pointers.
3737          * Allocate the dynamic array first and then allocate individual
3738          * commands.
3739          */
3740         instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
3741 
3742         if (!instance->cmd_list) {
3743                 printk(KERN_DEBUG "megasas: out of memory\n");
3744                 return -ENOMEM;
3745         }
3746 
3747         memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
3748 
3749         for (i = 0; i < max_cmd; i++) {
3750                 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
3751                                                 GFP_KERNEL);
3752 
3753                 if (!instance->cmd_list[i]) {
3754 
3755                         for (j = 0; j < i; j++)
3756                                 kfree(instance->cmd_list[j]);
3757 
3758                         kfree(instance->cmd_list);
3759                         instance->cmd_list = NULL;
3760 
3761                         return -ENOMEM;
3762                 }
3763         }
3764 
3765         for (i = 0; i < max_cmd; i++) {
3766                 cmd = instance->cmd_list[i];
3767                 memset(cmd, 0, sizeof(struct megasas_cmd));
3768                 cmd->index = i;
3769                 atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
3770                 cmd->scmd = NULL;
3771                 cmd->instance = instance;
3772 
3773                 list_add_tail(&cmd->list, &instance->cmd_pool);
3774         }
3775 
3776         /*
3777          * Create a frame pool and assign one frame to each cmd
3778          */
3779         if (megasas_create_frame_pool(instance)) {
3780                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
3781                 megasas_free_cmds(instance);
3782         }
3783 
3784         return 0;
3785 }
3786 
3787 /*
3788  * megasas_get_pd_list_info -   Returns FW's pd_list structure
3789  * @instance:                           Adapter soft state
3790  * @pd_list:                            pd_list structure
3791  *
3792  * Issues an internal command (DCMD) to get the FW's controller PD
3793  * list structure.  This information is mainly used to find out SYSTEM
3794  * supported by the FW.
3795  */
3796 static int
3797 megasas_get_pd_list(struct megasas_instance *instance)
3798 {
3799         int ret = 0, pd_index = 0;
3800         struct megasas_cmd *cmd;
3801         struct megasas_dcmd_frame *dcmd;
3802         struct MR_PD_LIST *ci;
3803         struct MR_PD_ADDRESS *pd_addr;
3804         dma_addr_t ci_h = 0;
3805 
3806         cmd = megasas_get_cmd(instance);
3807 
3808         if (!cmd) {
3809                 printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3810                 return -ENOMEM;
3811         }
3812 
3813         dcmd = &cmd->frame->dcmd;
3814 
3815         ci = pci_alloc_consistent(instance->pdev,
3816                   MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3817 
3818         if (!ci) {
3819                 printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3820                 megasas_return_cmd(instance, cmd);
3821                 return -ENOMEM;
3822         }
3823 
3824         memset(ci, 0, sizeof(*ci));
3825         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3826 
3827         dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3828         dcmd->mbox.b[1] = 0;
3829         dcmd->cmd = MFI_CMD_DCMD;
3830         dcmd->cmd_status = 0xFF;
3831         dcmd->sge_count = 1;
3832         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3833         dcmd->timeout = 0;
3834         dcmd->pad_0 = 0;
3835         dcmd->data_xfer_len = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3836         dcmd->opcode = cpu_to_le32(MR_DCMD_PD_LIST_QUERY);
3837         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3838         dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3839 
3840         if (instance->ctrl_context && !instance->mask_interrupts)
3841                 ret = megasas_issue_blocked_cmd(instance, cmd,
3842                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3843         else
3844                 ret = megasas_issue_polled(instance, cmd);
3845 
3846         /*
3847         * the following function will get the instance PD LIST.
3848         */
3849 
3850         pd_addr = ci->addr;
3851 
3852         if ( ret == 0 &&
3853              (le32_to_cpu(ci->count) <
3854                   (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3855 
3856                 memset(instance->local_pd_list, 0,
3857                         MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3858 
3859                 for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) {
3860 
3861                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid     =
3862                                 le16_to_cpu(pd_addr->deviceId);
3863                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType       =
3864                                                         pd_addr->scsiDevType;
3865                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState      =
3866                                                         MR_PD_STATE_SYSTEM;
3867                         pd_addr++;
3868                 }
3869                 memcpy(instance->pd_list, instance->local_pd_list,
3870                         sizeof(instance->pd_list));
3871         }
3872 
3873         pci_free_consistent(instance->pdev,
3874                                 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3875                                 ci, ci_h);
3876 
3877         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3878                 megasas_return_mfi_mpt_pthr(instance, cmd,
3879                         cmd->mpt_pthr_cmd_blocked);
3880         else
3881                 megasas_return_cmd(instance, cmd);
3882 
3883         return ret;
3884 }
3885 
3886 /*
3887  * megasas_get_ld_list_info -   Returns FW's ld_list structure
3888  * @instance:                           Adapter soft state
3889  * @ld_list:                            ld_list structure
3890  *
3891  * Issues an internal command (DCMD) to get the FW's controller PD
3892  * list structure.  This information is mainly used to find out SYSTEM
3893  * supported by the FW.
3894  */
3895 static int
3896 megasas_get_ld_list(struct megasas_instance *instance)
3897 {
3898         int ret = 0, ld_index = 0, ids = 0;
3899         struct megasas_cmd *cmd;
3900         struct megasas_dcmd_frame *dcmd;
3901         struct MR_LD_LIST *ci;
3902         dma_addr_t ci_h = 0;
3903         u32 ld_count;
3904 
3905         cmd = megasas_get_cmd(instance);
3906 
3907         if (!cmd) {
3908                 printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3909                 return -ENOMEM;
3910         }
3911 
3912         dcmd = &cmd->frame->dcmd;
3913 
3914         ci = pci_alloc_consistent(instance->pdev,
3915                                 sizeof(struct MR_LD_LIST),
3916                                 &ci_h);
3917 
3918         if (!ci) {
3919                 printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3920                 megasas_return_cmd(instance, cmd);
3921                 return -ENOMEM;
3922         }
3923 
3924         memset(ci, 0, sizeof(*ci));
3925         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3926 
3927         if (instance->supportmax256vd)
3928                 dcmd->mbox.b[0] = 1;
3929         dcmd->cmd = MFI_CMD_DCMD;
3930         dcmd->cmd_status = 0xFF;
3931         dcmd->sge_count = 1;
3932         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3933         dcmd->timeout = 0;
3934         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_LIST));
3935         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_GET_LIST);
3936         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3937         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST));
3938         dcmd->pad_0  = 0;
3939 
3940         if (instance->ctrl_context && !instance->mask_interrupts)
3941                 ret = megasas_issue_blocked_cmd(instance, cmd,
3942                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3943         else
3944                 ret = megasas_issue_polled(instance, cmd);
3945 
3946 
3947         ld_count = le32_to_cpu(ci->ldCount);
3948 
3949         /* the following function will get the instance PD LIST */
3950 
3951         if ((ret == 0) && (ld_count <= instance->fw_supported_vd_count)) {
3952                 memset(instance->ld_ids, 0xff, MAX_LOGICAL_DRIVES_EXT);
3953 
3954                 for (ld_index = 0; ld_index < ld_count; ld_index++) {
3955                         if (ci->ldList[ld_index].state != 0) {
3956                                 ids = ci->ldList[ld_index].ref.targetId;
3957                                 instance->ld_ids[ids] =
3958                                         ci->ldList[ld_index].ref.targetId;
3959                         }
3960                 }
3961         }
3962 
3963         pci_free_consistent(instance->pdev,
3964                                 sizeof(struct MR_LD_LIST),
3965                                 ci,
3966                                 ci_h);
3967 
3968         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3969                 megasas_return_mfi_mpt_pthr(instance, cmd,
3970                         cmd->mpt_pthr_cmd_blocked);
3971         else
3972                 megasas_return_cmd(instance, cmd);
3973         return ret;
3974 }
3975 
3976 /**
3977  * megasas_ld_list_query -      Returns FW's ld_list structure
3978  * @instance:                           Adapter soft state
3979  * @ld_list:                            ld_list structure
3980  *
3981  * Issues an internal command (DCMD) to get the FW's controller PD
3982  * list structure.  This information is mainly used to find out SYSTEM
3983  * supported by the FW.
3984  */
3985 static int
3986 megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
3987 {
3988         int ret = 0, ld_index = 0, ids = 0;
3989         struct megasas_cmd *cmd;
3990         struct megasas_dcmd_frame *dcmd;
3991         struct MR_LD_TARGETID_LIST *ci;
3992         dma_addr_t ci_h = 0;
3993         u32 tgtid_count;
3994 
3995         cmd = megasas_get_cmd(instance);
3996 
3997         if (!cmd) {
3998                 printk(KERN_WARNING
3999                        "megasas:(megasas_ld_list_query): Failed to get cmd\n");
4000                 return -ENOMEM;
4001         }
4002 
4003         dcmd = &cmd->frame->dcmd;
4004 
4005         ci = pci_alloc_consistent(instance->pdev,
4006                                   sizeof(struct MR_LD_TARGETID_LIST), &ci_h);
4007 
4008         if (!ci) {
4009                 printk(KERN_WARNING
4010                        "megasas: Failed to alloc mem for ld_list_query\n");
4011                 megasas_return_cmd(instance, cmd);
4012                 return -ENOMEM;
4013         }
4014 
4015         memset(ci, 0, sizeof(*ci));
4016         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4017 
4018         dcmd->mbox.b[0] = query_type;
4019         if (instance->supportmax256vd)
4020                 dcmd->mbox.b[2] = 1;
4021 
4022         dcmd->cmd = MFI_CMD_DCMD;
4023         dcmd->cmd_status = 0xFF;
4024         dcmd->sge_count = 1;
4025         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4026         dcmd->timeout = 0;
4027         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
4028         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_LIST_QUERY);
4029         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
4030         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
4031         dcmd->pad_0  = 0;
4032 
4033         if (instance->ctrl_context && !instance->mask_interrupts)
4034                 ret = megasas_issue_blocked_cmd(instance, cmd,
4035                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4036         else
4037                 ret = megasas_issue_polled(instance, cmd);
4038 
4039         tgtid_count = le32_to_cpu(ci->count);
4040 
4041         if ((ret == 0) && (tgtid_count <= (instance->fw_supported_vd_count))) {
4042                 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4043                 for (ld_index = 0; ld_index < tgtid_count; ld_index++) {
4044                         ids = ci->targetId[ld_index];
4045                         instance->ld_ids[ids] = ci->targetId[ld_index];
4046                 }
4047 
4048         }
4049 
4050         pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST),
4051                             ci, ci_h);
4052 
4053         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4054                 megasas_return_mfi_mpt_pthr(instance, cmd,
4055                         cmd->mpt_pthr_cmd_blocked);
4056         else
4057                 megasas_return_cmd(instance, cmd);
4058 
4059         return ret;
4060 }
4061 
4062 /*
4063  * megasas_update_ext_vd_details : Update details w.r.t Extended VD
4064  * instance                      : Controller's instance
4065 */
4066 static void megasas_update_ext_vd_details(struct megasas_instance *instance)
4067 {
4068         struct fusion_context *fusion;
4069         u32 old_map_sz;
4070         u32 new_map_sz;
4071 
4072         fusion = instance->ctrl_context;
4073         /* For MFI based controllers return dummy success */
4074         if (!fusion)
4075                 return;
4076 
4077         instance->supportmax256vd =
4078                 instance->ctrl_info->adapterOperations3.supportMaxExtLDs;
4079         /* Below is additional check to address future FW enhancement */
4080         if (instance->ctrl_info->max_lds > 64)
4081                 instance->supportmax256vd = 1;
4082 
4083         instance->drv_supported_vd_count = MEGASAS_MAX_LD_CHANNELS
4084                                         * MEGASAS_MAX_DEV_PER_CHANNEL;
4085         instance->drv_supported_pd_count = MEGASAS_MAX_PD_CHANNELS
4086                                         * MEGASAS_MAX_DEV_PER_CHANNEL;
4087         if (instance->supportmax256vd) {
4088                 instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES_EXT;
4089                 instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
4090         } else {
4091                 instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
4092                 instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
4093         }
4094         dev_info(&instance->pdev->dev, "Firmware supports %d VD %d PD\n",
4095                 instance->fw_supported_vd_count,
4096                 instance->fw_supported_pd_count);
4097         dev_info(&instance->pdev->dev, "Driver supports %d VD  %d PD\n",
4098                 instance->drv_supported_vd_count,
4099                 instance->drv_supported_pd_count);
4100 
4101         old_map_sz =  sizeof(struct MR_FW_RAID_MAP) +
4102                                 (sizeof(struct MR_LD_SPAN_MAP) *
4103                                 (instance->fw_supported_vd_count - 1));
4104         new_map_sz =  sizeof(struct MR_FW_RAID_MAP_EXT);
4105         fusion->drv_map_sz =  sizeof(struct MR_DRV_RAID_MAP) +
4106                                 (sizeof(struct MR_LD_SPAN_MAP) *
4107                                 (instance->drv_supported_vd_count - 1));
4108 
4109         fusion->max_map_sz = max(old_map_sz, new_map_sz);
4110 
4111 
4112         if (instance->supportmax256vd)
4113                 fusion->current_map_sz = new_map_sz;
4114         else
4115                 fusion->current_map_sz = old_map_sz;
4116 
4117 }
4118 
4119 /**
4120  * megasas_get_controller_info -        Returns FW's controller structure
4121  * @instance:                           Adapter soft state
4122  *
4123  * Issues an internal command (DCMD) to get the FW's controller structure.
4124  * This information is mainly used to find out the maximum IO transfer per
4125  * command supported by the FW.
4126  */
4127 int
4128 megasas_get_ctrl_info(struct megasas_instance *instance)
4129 {
4130         int ret = 0;
4131         struct megasas_cmd *cmd;
4132         struct megasas_dcmd_frame *dcmd;
4133         struct megasas_ctrl_info *ci;
4134         struct megasas_ctrl_info *ctrl_info;
4135         dma_addr_t ci_h = 0;
4136 
4137         ctrl_info = instance->ctrl_info;
4138 
4139         cmd = megasas_get_cmd(instance);
4140 
4141         if (!cmd) {
4142                 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
4143                 return -ENOMEM;
4144         }
4145 
4146         dcmd = &cmd->frame->dcmd;
4147 
4148         ci = pci_alloc_consistent(instance->pdev,
4149                                   sizeof(struct megasas_ctrl_info), &ci_h);
4150 
4151         if (!ci) {
4152                 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
4153                 megasas_return_cmd(instance, cmd);
4154                 return -ENOMEM;
4155         }
4156 
4157         memset(ci, 0, sizeof(*ci));
4158         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4159 
4160         dcmd->cmd = MFI_CMD_DCMD;
4161         dcmd->cmd_status = 0xFF;
4162         dcmd->sge_count = 1;
4163         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4164         dcmd->timeout = 0;
4165         dcmd->pad_0 = 0;
4166         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4167         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_GET_INFO);
4168         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
4169         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4170         dcmd->mbox.b[0] = 1;
4171 
4172         if (instance->ctrl_context && !instance->mask_interrupts)
4173                 ret = megasas_issue_blocked_cmd(instance, cmd,
4174                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4175         else
4176                 ret = megasas_issue_polled(instance, cmd);
4177 
4178         if (!ret) {
4179                 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
4180                 le32_to_cpus((u32 *)&ctrl_info->properties.OnOffProperties);
4181                 le32_to_cpus((u32 *)&ctrl_info->adapterOperations2);
4182                 le32_to_cpus((u32 *)&ctrl_info->adapterOperations3);
4183                 megasas_update_ext_vd_details(instance);
4184         }
4185 
4186         pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
4187                             ci, ci_h);
4188 
4189         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4190                 megasas_return_mfi_mpt_pthr(instance, cmd,
4191                         cmd->mpt_pthr_cmd_blocked);
4192         else
4193                 megasas_return_cmd(instance, cmd);
4194         return ret;
4195 }
4196 
4197 /*
4198  * megasas_set_crash_dump_params -      Sends address of crash dump DMA buffer
4199  *                                      to firmware
4200  *
4201  * @instance:                           Adapter soft state
4202  * @crash_buf_state             -       tell FW to turn ON/OFF crash dump feature
4203                                         MR_CRASH_BUF_TURN_OFF = 0
4204                                         MR_CRASH_BUF_TURN_ON = 1
4205  * @return 0 on success non-zero on failure.
4206  * Issues an internal command (DCMD) to set parameters for crash dump feature.
4207  * Driver will send address of crash dump DMA buffer and set mbox to tell FW
4208  * that driver supports crash dump feature. This DCMD will be sent only if
4209  * crash dump feature is supported by the FW.
4210  *
4211  */
4212 int megasas_set_crash_dump_params(struct megasas_instance *instance,
4213         u8 crash_buf_state)
4214 {
4215         int ret = 0;
4216         struct megasas_cmd *cmd;
4217         struct megasas_dcmd_frame *dcmd;
4218 
4219         cmd = megasas_get_cmd(instance);
4220 
4221         if (!cmd) {
4222                 dev_err(&instance->pdev->dev, "Failed to get a free cmd\n");
4223                 return -ENOMEM;
4224         }
4225 
4226 
4227         dcmd = &cmd->frame->dcmd;
4228 
4229         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4230         dcmd->mbox.b[0] = crash_buf_state;
4231         dcmd->cmd = MFI_CMD_DCMD;
4232         dcmd->cmd_status = 0xFF;
4233         dcmd->sge_count = 1;
4234         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
4235         dcmd->timeout = 0;
4236         dcmd->pad_0 = 0;
4237         dcmd->data_xfer_len = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4238         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SET_CRASH_DUMP_PARAMS);
4239         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->crash_dump_h);
4240         dcmd->sgl.sge32[0].length = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4241 
4242         if (instance->ctrl_context && !instance->mask_interrupts)
4243                 ret = megasas_issue_blocked_cmd(instance, cmd,
4244                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4245         else
4246                 ret = megasas_issue_polled(instance, cmd);
4247 
4248         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4249                 megasas_return_mfi_mpt_pthr(instance, cmd,
4250                         cmd->mpt_pthr_cmd_blocked);
4251         else
4252                 megasas_return_cmd(instance, cmd);
4253         return ret;
4254 }
4255 
4256 /**
4257  * megasas_issue_init_mfi -     Initializes the FW
4258  * @instance:           Adapter soft state
4259  *
4260  * Issues the INIT MFI cmd
4261  */
4262 static int
4263 megasas_issue_init_mfi(struct megasas_instance *instance)
4264 {
4265         u32 context;
4266 
4267         struct megasas_cmd *cmd;
4268 
4269         struct megasas_init_frame *init_frame;
4270         struct megasas_init_queue_info *initq_info;
4271         dma_addr_t init_frame_h;
4272         dma_addr_t initq_info_h;
4273 
4274         /*
4275          * Prepare a init frame. Note the init frame points to queue info
4276          * structure. Each frame has SGL allocated after first 64 bytes. For
4277          * this frame - since we don't need any SGL - we use SGL's space as
4278          * queue info structure
4279          *
4280          * We will not get a NULL command below. We just created the pool.
4281          */
4282         cmd = megasas_get_cmd(instance);
4283 
4284         init_frame = (struct megasas_init_frame *)cmd->frame;
4285         initq_info = (struct megasas_init_queue_info *)
4286                 ((unsigned long)init_frame + 64);
4287 
4288         init_frame_h = cmd->frame_phys_addr;
4289         initq_info_h = init_frame_h + 64;
4290 
4291         context = init_frame->context;
4292         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
4293         memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
4294         init_frame->context = context;
4295 
4296         initq_info->reply_queue_entries = cpu_to_le32(instance->max_fw_cmds + 1);
4297         initq_info->reply_queue_start_phys_addr_lo = cpu_to_le32(instance->reply_queue_h);
4298 
4299         initq_info->producer_index_phys_addr_lo = cpu_to_le32(instance->producer_h);
4300         initq_info->consumer_index_phys_addr_lo = cpu_to_le32(instance->consumer_h);
4301 
4302         init_frame->cmd = MFI_CMD_INIT;
4303         init_frame->cmd_status = 0xFF;
4304         init_frame->queue_info_new_phys_addr_lo =
4305                 cpu_to_le32(lower_32_bits(initq_info_h));
4306         init_frame->queue_info_new_phys_addr_hi =
4307                 cpu_to_le32(upper_32_bits(initq_info_h));
4308 
4309         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct megasas_init_queue_info));
4310 
4311         /*
4312          * disable the intr before firing the init frame to FW
4313          */
4314         instance->instancet->disable_intr(instance);
4315 
4316         /*
4317          * Issue the init frame in polled mode
4318          */
4319 
4320         if (megasas_issue_polled(instance, cmd)) {
4321                 printk(KERN_ERR "megasas: Failed to init firmware\n");
4322                 megasas_return_cmd(instance, cmd);
4323                 goto fail_fw_init;
4324         }
4325 
4326         megasas_return_cmd(instance, cmd);
4327 
4328         return 0;
4329 
4330 fail_fw_init:
4331         return -EINVAL;
4332 }
4333 
4334 static u32
4335 megasas_init_adapter_mfi(struct megasas_instance *instance)
4336 {
4337         struct megasas_register_set __iomem *reg_set;
4338         u32 context_sz;
4339         u32 reply_q_sz;
4340 
4341         reg_set = instance->reg_set;
4342 
4343         /*
4344          * Get various operational parameters from status register
4345          */
4346         instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
4347         /*
4348          * Reduce the max supported cmds by 1. This is to ensure that the
4349          * reply_q_sz (1 more than the max cmd that driver may send)
4350          * does not exceed max cmds that the FW can support
4351          */
4352         instance->max_fw_cmds = instance->max_fw_cmds-1;
4353         instance->max_mfi_cmds = instance->max_fw_cmds;
4354         instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
4355                                         0x10;
4356         /*
4357          * Create a pool of commands
4358          */
4359         if (megasas_alloc_cmds(instance))
4360                 goto fail_alloc_cmds;
4361 
4362         /*
4363          * Allocate memory for reply queue. Length of reply queue should
4364          * be _one_ more than the maximum commands handled by the firmware.
4365          *
4366          * Note: When FW completes commands, it places corresponding contex
4367          * values in this circular reply queue. This circular queue is a fairly
4368          * typical producer-consumer queue. FW is the producer (of completed
4369          * commands) and the driver is the consumer.
4370          */
4371         context_sz = sizeof(u32);
4372         reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
4373 
4374         instance->reply_queue = pci_alloc_consistent(instance->pdev,
4375                                                      reply_q_sz,
4376                                                      &instance->reply_queue_h);
4377 
4378         if (!instance->reply_queue) {
4379                 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
4380                 goto fail_reply_queue;
4381         }
4382 
4383         if (megasas_issue_init_mfi(instance))
4384                 goto fail_fw_init;
4385 
4386         if (megasas_get_ctrl_info(instance)) {
4387                 dev_err(&instance->pdev->dev, "(%d): Could get controller info "
4388                         "Fail from %s %d\n", instance->unique_id,
4389                         __func__, __LINE__);
4390                 goto fail_fw_init;
4391         }
4392 
4393         instance->fw_support_ieee = 0;
4394         instance->fw_support_ieee =
4395                 (instance->instancet->read_fw_status_reg(reg_set) &
4396                 0x04000000);
4397 
4398         printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
4399                         instance->fw_support_ieee);
4400 
4401         if (instance->fw_support_ieee)
4402                 instance->flag_ieee = 1;
4403 
4404         return 0;
4405 
4406 fail_fw_init:
4407 
4408         pci_free_consistent(instance->pdev, reply_q_sz,
4409                             instance->reply_queue, instance->reply_queue_h);
4410 fail_reply_queue:
4411         megasas_free_cmds(instance);
4412 
4413 fail_alloc_cmds:
4414         return 1;
4415 }
4416 
4417 /**
4418  * megasas_init_fw -    Initializes the FW
4419  * @instance:           Adapter soft state
4420  *
4421  * This is the main function for initializing firmware
4422  */
4423 
4424 static int megasas_init_fw(struct megasas_instance *instance)
4425 {
4426         u32 max_sectors_1;
4427         u32 max_sectors_2;
4428         u32 tmp_sectors, msix_enable, scratch_pad_2;
4429         resource_size_t base_addr;
4430         struct megasas_register_set __iomem *reg_set;
4431         struct megasas_ctrl_info *ctrl_info = NULL;
4432         unsigned long bar_list;
4433         int i, loop, fw_msix_count = 0;
4434         struct IOV_111 *iovPtr;
4435 
4436         /* Find first memory bar */
4437         bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
4438         instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
4439         if (pci_request_selected_regions(instance->pdev, instance->bar,
4440                                          "megasas: LSI")) {
4441                 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
4442                 return -EBUSY;
4443         }
4444 
4445         base_addr = pci_resource_start(instance->pdev, instance->bar);
4446         instance->reg_set = ioremap_nocache(base_addr, 8192);
4447 
4448         if (!instance->reg_set) {
4449                 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
4450                 goto fail_ioremap;
4451         }
4452 
4453         reg_set = instance->reg_set;
4454 
4455         switch (instance->pdev->device) {
4456         case PCI_DEVICE_ID_LSI_FUSION:
4457         case PCI_DEVICE_ID_LSI_PLASMA:
4458         case PCI_DEVICE_ID_LSI_INVADER:
4459         case PCI_DEVICE_ID_LSI_FURY:
4460                 instance->instancet = &megasas_instance_template_fusion;
4461                 break;
4462         case PCI_DEVICE_ID_LSI_SAS1078R:
4463         case PCI_DEVICE_ID_LSI_SAS1078DE:
4464                 instance->instancet = &megasas_instance_template_ppc;
4465                 break;
4466         case PCI_DEVICE_ID_LSI_SAS1078GEN2:
4467         case PCI_DEVICE_ID_LSI_SAS0079GEN2:
4468                 instance->instancet = &megasas_instance_template_gen2;
4469                 break;
4470         case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
4471         case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
4472                 instance->instancet = &megasas_instance_template_skinny;
4473                 break;
4474         case PCI_DEVICE_ID_LSI_SAS1064R:
4475         case PCI_DEVICE_ID_DELL_PERC5:
4476         default:
4477                 instance->instancet = &megasas_instance_template_xscale;
4478                 break;
4479         }
4480 
4481         if (megasas_transition_to_ready(instance, 0)) {
4482                 atomic_set(&instance->fw_reset_no_pci_access, 1);
4483                 instance->instancet->adp_reset
4484                         (instance, instance->reg_set);
4485                 atomic_set(&instance->fw_reset_no_pci_access, 0);
4486                 dev_info(&instance->pdev->dev,
4487                         "megasas: FW restarted successfully from %s!\n",
4488                         __func__);
4489 
4490                 /*waitting for about 30 second before retry*/
4491                 ssleep(30);
4492 
4493                 if (megasas_transition_to_ready(instance, 0))
4494                         goto fail_ready_state;
4495         }
4496 
4497         /*
4498          * MSI-X host index 0 is common for all adapter.
4499          * It is used for all MPT based Adapters.
4500          */
4501         instance->reply_post_host_index_addr[0] =
4502                 (u32 *)((u8 *)instance->reg_set +
4503                 MPI2_REPLY_POST_HOST_INDEX_OFFSET);
4504 
4505         /* Check if MSI-X is supported while in ready state */
4506         msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
4507                        0x4000000) >> 0x1a;
4508         if (msix_enable && !msix_disable) {
4509                 scratch_pad_2 = readl
4510                         (&instance->reg_set->outbound_scratch_pad_2);
4511                 /* Check max MSI-X vectors */
4512                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4513                     (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA)) {
4514                         instance->msix_vectors = (scratch_pad_2
4515                                 & MR_MAX_REPLY_QUEUES_OFFSET) + 1;
4516                         fw_msix_count = instance->msix_vectors;
4517                         if (msix_vectors)
4518                                 instance->msix_vectors =
4519                                         min(msix_vectors,
4520                                             instance->msix_vectors);
4521                 } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)
4522                         || (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4523                         /* Invader/Fury supports more than 8 MSI-X */
4524                         instance->msix_vectors = ((scratch_pad_2
4525                                 & MR_MAX_REPLY_QUEUES_EXT_OFFSET)
4526                                 >> MR_MAX_REPLY_QUEUES_EXT_OFFSET_SHIFT) + 1;
4527                         fw_msix_count = instance->msix_vectors;
4528                         /* Save 1-15 reply post index address to local memory
4529                          * Index 0 is already saved from reg offset
4530                          * MPI2_REPLY_POST_HOST_INDEX_OFFSET
4531                          */
4532                         for (loop = 1; loop < MR_MAX_MSIX_REG_ARRAY; loop++) {
4533                                 instance->reply_post_host_index_addr[loop] =
4534                                         (u32 *)((u8 *)instance->reg_set +
4535                                         MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET
4536                                         + (loop * 0x10));
4537                         }
4538                         if (msix_vectors)
4539                                 instance->msix_vectors = min(msix_vectors,
4540                                         instance->msix_vectors);
4541                 } else
4542                         instance->msix_vectors = 1;
4543                 /* Don't bother allocating more MSI-X vectors than cpus */
4544                 instance->msix_vectors = min(instance->msix_vectors,
4545                                              (unsigned int)num_online_cpus());
4546                 for (i = 0; i < instance->msix_vectors; i++)
4547                         instance->msixentry[i].entry = i;
4548                 i = pci_enable_msix_range(instance->pdev, instance->msixentry,
4549                                           1, instance->msix_vectors);
4550                 if (i > 0)
4551                         instance->msix_vectors = i;
4552                 else
4553                         instance->msix_vectors = 0;
4554 
4555                 dev_info(&instance->pdev->dev, "[scsi%d]: FW supports"
4556                         "<%d> MSIX vector,Online CPUs: <%d>,"
4557                         "Current MSIX <%d>\n", instance->host->host_no,
4558                         fw_msix_count, (unsigned int)num_online_cpus(),
4559                         instance->msix_vectors);
4560         }
4561 
4562         instance->ctrl_info = kzalloc(sizeof(struct megasas_ctrl_info),
4563                                 GFP_KERNEL);
4564         if (instance->ctrl_info == NULL)
4565                 goto fail_init_adapter;
4566 
4567         /*
4568          * Below are default value for legacy Firmware.
4569          * non-fusion based controllers
4570          */
4571         instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
4572         instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
4573         /* Get operational params, sge flags, send init cmd to controller */
4574         if (instance->instancet->init_adapter(instance))
4575                 goto fail_init_adapter;
4576 
4577         printk(KERN_ERR "megasas: INIT adapter done\n");
4578 
4579         /** for passthrough
4580         * the following function will get the PD LIST.
4581         */
4582 
4583         memset(instance->pd_list, 0 ,
4584                 (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
4585         if (megasas_get_pd_list(instance) < 0) {
4586                 printk(KERN_ERR "megasas: failed to get PD list\n");
4587                 goto fail_init_adapter;
4588         }
4589 
4590         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4591         if (megasas_ld_list_query(instance,
4592                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
4593                 megasas_get_ld_list(instance);
4594 
4595         /*
4596          * Compute the max allowed sectors per IO: The controller info has two
4597          * limits on max sectors. Driver should use the minimum of these two.
4598          *
4599          * 1 << stripe_sz_ops.min = max sectors per strip
4600          *
4601          * Note that older firmwares ( < FW ver 30) didn't report information
4602          * to calculate max_sectors_1. So the number ended up as zero always.
4603          */
4604         tmp_sectors = 0;
4605         ctrl_info = instance->ctrl_info;
4606 
4607         max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
4608                 le16_to_cpu(ctrl_info->max_strips_per_io);
4609         max_sectors_2 = le32_to_cpu(ctrl_info->max_request_size);
4610 
4611         tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
4612 
4613         /*Check whether controller is iMR or MR */
4614         if (ctrl_info->memory_size) {
4615                 instance->is_imr = 0;
4616                 dev_info(&instance->pdev->dev, "Controller type: MR,"
4617                         "Memory size is: %dMB\n",
4618                         le16_to_cpu(ctrl_info->memory_size));
4619         } else {
4620                 instance->is_imr = 1;
4621                 dev_info(&instance->pdev->dev,
4622                         "Controller type: iMR\n");
4623         }
4624         instance->disableOnlineCtrlReset =
4625         ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
4626         instance->mpio = ctrl_info->adapterOperations2.mpio;
4627         instance->UnevenSpanSupport =
4628                 ctrl_info->adapterOperations2.supportUnevenSpans;
4629         if (instance->UnevenSpanSupport) {
4630                 struct fusion_context *fusion = instance->ctrl_context;
4631 
4632                 dev_info(&instance->pdev->dev, "FW supports: "
4633                 "UnevenSpanSupport=%x\n", instance->UnevenSpanSupport);
4634                 if (MR_ValidateMapInfo(instance))
4635                         fusion->fast_path_io = 1;
4636                 else
4637                         fusion->fast_path_io = 0;
4638 
4639         }
4640         if (ctrl_info->host_interface.SRIOV) {
4641                 if (!ctrl_info->adapterOperations2.activePassive)
4642                         instance->PlasmaFW111 = 1;
4643 
4644                 if (!instance->PlasmaFW111)
4645                         instance->requestorId =
4646                                 ctrl_info->iov.requestorId;
4647                 else {
4648                         iovPtr = (struct IOV_111 *)((unsigned char *)ctrl_info + IOV_111_OFFSET);
4649                         instance->requestorId = iovPtr->requestorId;
4650                 }
4651                 dev_warn(&instance->pdev->dev, "I am VF "
4652                        "requestorId %d\n", instance->requestorId);
4653         }
4654 
4655         instance->crash_dump_fw_support =
4656                 ctrl_info->adapterOperations3.supportCrashDump;
4657         instance->crash_dump_drv_support =
4658                 (instance->crash_dump_fw_support &&
4659                 instance->crash_dump_buf);
4660         if (instance->crash_dump_drv_support) {
4661                 dev_info(&instance->pdev->dev, "Firmware Crash dump "
4662                         "feature is supported\n");
4663                 megasas_set_crash_dump_params(instance,
4664                         MR_CRASH_BUF_TURN_OFF);
4665 
4666         } else {
4667                 if (instance->crash_dump_buf)
4668                         pci_free_consistent(instance->pdev,
4669                                 CRASH_DMA_BUF_SIZE,
4670                                 instance->crash_dump_buf,
4671                                 instance->crash_dump_h);
4672                 instance->crash_dump_buf = NULL;
4673         }
4674 
4675         instance->secure_jbod_support =
4676                 ctrl_info->adapterOperations3.supportSecurityonJBOD;
4677         if (instance->secure_jbod_support)
4678                 dev_info(&instance->pdev->dev, "Firmware supports Secure JBOD\n");
4679         instance->max_sectors_per_req = instance->max_num_sge *
4680                                                 PAGE_SIZE / 512;
4681         if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
4682                 instance->max_sectors_per_req = tmp_sectors;
4683 
4684         /*
4685          * 1. For fusion adapters, 3 commands for IOCTL and 5 commands
4686          *    for driver's internal DCMDs.
4687          * 2. For MFI skinny adapters, 5 commands for IOCTL + driver's
4688          *    internal DCMDs.
4689          * 3. For rest of MFI adapters, 27 commands reserved for IOCTLs
4690          *    and 5 commands for drivers's internal DCMD.
4691          */
4692         if (instance->ctrl_context) {
4693                 instance->max_scsi_cmds = instance->max_fw_cmds -
4694                                         (MEGASAS_FUSION_INTERNAL_CMDS +
4695                                         MEGASAS_FUSION_IOCTL_CMDS);
4696                 sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
4697         } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
4698                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
4699                 instance->max_scsi_cmds = instance->max_fw_cmds -
4700                                                 MEGASAS_SKINNY_INT_CMDS;
4701                 sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
4702         } else {
4703                 instance->max_scsi_cmds = instance->max_fw_cmds -
4704                                                 MEGASAS_INT_CMDS;
4705                 sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
4706         }
4707 
4708         /* Check for valid throttlequeuedepth module parameter */
4709         if (throttlequeuedepth &&
4710                         throttlequeuedepth <= instance->max_scsi_cmds)
4711                 instance->throttlequeuedepth = throttlequeuedepth;
4712         else
4713                 instance->throttlequeuedepth =
4714                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4715 
4716         /*
4717         * Setup tasklet for cmd completion
4718         */
4719 
4720         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4721                 (unsigned long)instance);
4722 
4723         /* Launch SR-IOV heartbeat timer */
4724         if (instance->requestorId) {
4725                 if (!megasas_sriov_start_heartbeat(instance, 1))
4726                         megasas_start_timer(instance,
4727                                             &instance->sriov_heartbeat_timer,
4728                                             megasas_sriov_heartbeat_handler,
4729                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
4730                 else
4731                         instance->skip_heartbeat_timer_del = 1;
4732         }
4733 
4734         return 0;
4735 
4736 fail_init_adapter:
4737 fail_ready_state:
4738         kfree(instance->ctrl_info);
4739         instance->ctrl_info = NULL;
4740         iounmap(instance->reg_set);
4741 
4742       fail_ioremap:
4743         pci_release_selected_regions(instance->pdev, instance->bar);
4744 
4745         return -EINVAL;
4746 }
4747 
4748 /**
4749  * megasas_release_mfi -        Reverses the FW initialization
4750  * @intance:                    Adapter soft state
4751  */
4752 static void megasas_release_mfi(struct megasas_instance *instance)
4753 {
4754         u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
4755 
4756         if (instance->reply_queue)
4757                 pci_free_consistent(instance->pdev, reply_q_sz,
4758                             instance->reply_queue, instance->reply_queue_h);
4759 
4760         megasas_free_cmds(instance);
4761 
4762         iounmap(instance->reg_set);
4763 
4764         pci_release_selected_regions(instance->pdev, instance->bar);
4765 }
4766 
4767 /**
4768  * megasas_get_seq_num -        Gets latest event sequence numbers
4769  * @instance:                   Adapter soft state
4770  * @eli:                        FW event log sequence numbers information
4771  *
4772  * FW maintains a log of all events in a non-volatile area. Upper layers would
4773  * usually find out the latest sequence number of the events, the seq number at
4774  * the boot etc. They would "read" all the events below the latest seq number
4775  * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
4776  * number), they would subsribe to AEN (asynchronous event notification) and
4777  * wait for the events to happen.
4778  */
4779 static int
4780 megasas_get_seq_num(struct megasas_instance *instance,
4781                     struct megasas_evt_log_info *eli)
4782 {
4783         struct megasas_cmd *cmd;
4784         struct megasas_dcmd_frame *dcmd;
4785         struct megasas_evt_log_info *el_info;
4786         dma_addr_t el_info_h = 0;
4787 
4788         cmd = megasas_get_cmd(instance);
4789 
4790         if (!cmd) {
4791                 return -ENOMEM;
4792         }
4793 
4794         dcmd = &cmd->frame->dcmd;
4795         el_info = pci_alloc_consistent(instance->pdev,
4796                                        sizeof(struct megasas_evt_log_info),
4797                                        &el_info_h);
4798 
4799         if (!el_info) {
4800                 megasas_return_cmd(instance, cmd);
4801                 return -ENOMEM;
4802         }
4803 
4804         memset(el_info, 0, sizeof(*el_info));
4805         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4806 
4807         dcmd->cmd = MFI_CMD_DCMD;
4808         dcmd->cmd_status = 0x0;
4809         dcmd->sge_count = 1;
4810         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4811         dcmd->timeout = 0;
4812         dcmd->pad_0 = 0;
4813         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4814         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_GET_INFO);
4815         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(el_info_h);
4816         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4817 
4818         if (megasas_issue_blocked_cmd(instance, cmd, 30))
4819                 dev_err(&instance->pdev->dev, "Command timedout"
4820                         "from %s\n", __func__);
4821         else {
4822                 /*
4823                  * Copy the data back into callers buffer
4824                  */
4825                 eli->newest_seq_num = le32_to_cpu(el_info->newest_seq_num);
4826                 eli->oldest_seq_num = le32_to_cpu(el_info->oldest_seq_num);
4827                 eli->clear_seq_num = le32_to_cpu(el_info->clear_seq_num);
4828                 eli->shutdown_seq_num = le32_to_cpu(el_info->shutdown_seq_num);
4829                 eli->boot_seq_num = le32_to_cpu(el_info->boot_seq_num);
4830         }
4831 
4832         pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
4833                             el_info, el_info_h);
4834 
4835         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4836                 megasas_return_mfi_mpt_pthr(instance, cmd,
4837                         cmd->mpt_pthr_cmd_blocked);
4838         else
4839                 megasas_return_cmd(instance, cmd);
4840 
4841         return 0;
4842 }
4843 
4844 /**
4845  * megasas_register_aen -       Registers for asynchronous event notification
4846  * @instance:                   Adapter soft state
4847  * @seq_num:                    The starting sequence number
4848  * @class_locale:               Class of the event
4849  *
4850  * This function subscribes for AEN for events beyond the @seq_num. It requests
4851  * to be notified if and only if the event is of type @class_locale
4852  */
4853 static int
4854 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
4855                      u32 class_locale_word)
4856 {
4857         int ret_val;
4858         struct megasas_cmd *cmd;
4859         struct megasas_dcmd_frame *dcmd;
4860         union megasas_evt_class_locale curr_aen;
4861         union megasas_evt_class_locale prev_aen;
4862 
4863         /*
4864          * If there an AEN pending already (aen_cmd), check if the
4865          * class_locale of that pending AEN is inclusive of the new
4866          * AEN request we currently have. If it is, then we don't have
4867          * to do anything. In other words, whichever events the current
4868          * AEN request is subscribing to, have already been subscribed
4869          * to.
4870          *
4871          * If the old_cmd is _not_ inclusive, then we have to abort
4872          * that command, form a class_locale that is superset of both
4873          * old and current and re-issue to the FW
4874          */
4875 
4876         curr_aen.word = class_locale_word;
4877 
4878         if (instance->aen_cmd) {
4879 
4880                 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
4881                 prev_aen.members.locale = le16_to_cpu(prev_aen.members.locale);
4882 
4883                 /*
4884                  * A class whose enum value is smaller is inclusive of all
4885                  * higher values. If a PROGRESS (= -1) was previously
4886                  * registered, then a new registration requests for higher
4887                  * classes need not be sent to FW. They are automatically
4888                  * included.
4889                  *
4890                  * Locale numbers don't have such hierarchy. They are bitmap
4891                  * values
4892                  */
4893                 if ((prev_aen.members.class <= curr_aen.members.class) &&
4894                     !((prev_aen.members.locale & curr_aen.members.locale) ^
4895                       curr_aen.members.locale)) {
4896                         /*
4897                          * Previously issued event registration includes
4898                          * current request. Nothing to do.
4899                          */
4900                         return 0;
4901                 } else {
4902                         curr_aen.members.locale |= prev_aen.members.locale;
4903 
4904                         if (prev_aen.members.class < curr_aen.members.class)
4905                                 curr_aen.members.class = prev_aen.members.class;
4906 
4907                         instance->aen_cmd->abort_aen = 1;
4908                         ret_val = megasas_issue_blocked_abort_cmd(instance,
4909                                                                   instance->
4910                                                                   aen_cmd, 30);
4911 
4912                         if (ret_val) {
4913                                 printk(KERN_DEBUG "megasas: Failed to abort "
4914                                        "previous AEN command\n");
4915                                 return ret_val;
4916                         }
4917                 }
4918         }
4919 
4920         cmd = megasas_get_cmd(instance);
4921 
4922         if (!cmd)
4923                 return -ENOMEM;
4924 
4925         dcmd = &cmd->frame->dcmd;
4926 
4927         memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
4928 
4929         /*
4930          * Prepare DCMD for aen registration
4931          */
4932         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4933 
4934         dcmd->cmd = MFI_CMD_DCMD;
4935         dcmd->cmd_status = 0x0;
4936         dcmd->sge_count = 1;
4937         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4938         dcmd->timeout = 0;
4939         dcmd->pad_0 = 0;
4940         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_detail));
4941         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_WAIT);
4942         dcmd->mbox.w[0] = cpu_to_le32(seq_num);
4943         instance->last_seq_num = seq_num;
4944         dcmd->mbox.w[1] = cpu_to_le32(curr_aen.word);
4945         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->evt_detail_h);
4946         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_detail));
4947 
4948         if (instance->aen_cmd != NULL) {
4949                 megasas_return_cmd(instance, cmd);
4950                 return 0;
4951         }
4952 
4953         /*
4954          * Store reference to the cmd used to register for AEN. When an
4955          * application wants us to register for AEN, we have to abort this
4956          * cmd and re-register with a new EVENT LOCALE supplied by that app
4957          */
4958         instance->aen_cmd = cmd;
4959 
4960         /*
4961          * Issue the aen registration frame
4962          */
4963         instance->instancet->issue_dcmd(instance, cmd);
4964 
4965         return 0;
4966 }
4967 
4968 /**
4969  * megasas_start_aen -  Subscribes to AEN during driver load time
4970  * @instance:           Adapter soft state
4971  */
4972 static int megasas_start_aen(struct megasas_instance *instance)
4973 {
4974         struct megasas_evt_log_info eli;
4975         union megasas_evt_class_locale class_locale;
4976 
4977         /*
4978          * Get the latest sequence number from FW
4979          */
4980         memset(&eli, 0, sizeof(eli));
4981 
4982         if (megasas_get_seq_num(instance, &eli))
4983                 return -1;
4984 
4985         /*
4986          * Register AEN with FW for latest sequence number plus 1
4987          */
4988         class_locale.members.reserved = 0;
4989         class_locale.members.locale = MR_EVT_LOCALE_ALL;
4990         class_locale.members.class = MR_EVT_CLASS_DEBUG;
4991 
4992         return megasas_register_aen(instance,
4993                         eli.newest_seq_num + 1,
4994                         class_locale.word);
4995 }
4996 
4997 /**
4998  * megasas_io_attach -  Attaches this driver to SCSI mid-layer
4999  * @instance:           Adapter soft state
5000  */
5001 static int megasas_io_attach(struct megasas_instance *instance)
5002 {
5003         struct Scsi_Host *host = instance->host;
5004 
5005         /*
5006          * Export parameters required by SCSI mid-layer
5007          */
5008         host->irq = instance->pdev->irq;
5009         host->unique_id = instance->unique_id;
5010         host->can_queue = instance->max_scsi_cmds;
5011         host->this_id = instance->init_id;
5012         host->sg_tablesize = instance->max_num_sge;
5013 
5014         if (instance->fw_support_ieee)
5015                 instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
5016 
5017         /*
5018          * Check if the module parameter value for max_sectors can be used
5019          */
5020         if (max_sectors && max_sectors < instance->max_sectors_per_req)
5021                 instance->max_sectors_per_req = max_sectors;
5022         else {
5023                 if (max_sectors) {
5024                         if (((instance->pdev->device ==
5025                                 PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
5026                                 (instance->pdev->device ==
5027                                 PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
5028                                 (max_sectors <= MEGASAS_MAX_SECTORS)) {
5029                                 instance->max_sectors_per_req = max_sectors;
5030                         } else {
5031                         printk(KERN_INFO "megasas: max_sectors should be > 0"
5032                                 "and <= %d (or < 1MB for GEN2 controller)\n",
5033                                 instance->max_sectors_per_req);
5034                         }
5035                 }
5036         }
5037 
5038         host->max_sectors = instance->max_sectors_per_req;
5039         host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
5040         host->max_channel = MEGASAS_MAX_CHANNELS - 1;
5041         host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
5042         host->max_lun = MEGASAS_MAX_LUN;
5043         host->max_cmd_len = 16;
5044 
5045         /* Fusion only supports host reset */
5046         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5047             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5048             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5049             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
5050                 host->hostt->eh_device_reset_handler = NULL;
5051                 host->hostt->eh_bus_reset_handler = NULL;
5052         }
5053 
5054         /*
5055          * Notify the mid-layer about the new controller
5056          */
5057         if (scsi_add_host(host, &instance->pdev->dev)) {
5058                 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
5059                 return -ENODEV;
5060         }
5061 
5062         return 0;
5063 }
5064 
5065 static int
5066 megasas_set_dma_mask(struct pci_dev *pdev)
5067 {
5068         /*
5069          * All our contollers are capable of performing 64-bit DMA
5070          */
5071         if (IS_DMA64) {
5072                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
5073 
5074                         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
5075                                 goto fail_set_dma_mask;
5076                 }
5077         } else {
5078                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
5079                         goto fail_set_dma_mask;
5080         }
5081         /*
5082          * Ensure that all data structures are allocated in 32-bit
5083          * memory.
5084          */
5085         if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
5086                 /* Try 32bit DMA mask and 32 bit Consistent dma mask */
5087                 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
5088                         && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
5089                         dev_info(&pdev->dev, "set 32bit DMA mask"
5090                                 "and 32 bit consistent mask\n");
5091                 else
5092                         goto fail_set_dma_mask;
5093         }
5094 
5095         return 0;
5096 
5097 fail_set_dma_mask:
5098         return 1;
5099 }
5100 
5101 /**
5102  * megasas_probe_one -  PCI hotplug entry point
5103  * @pdev:               PCI device structure
5104  * @id:                 PCI ids of supported hotplugged adapter
5105  */
5106 static int megasas_probe_one(struct pci_dev *pdev,
5107                              const struct pci_device_id *id)
5108 {
5109         int rval, pos, i, j, cpu;
5110         struct Scsi_Host *host;
5111         struct megasas_instance *instance;
5112         u16 control = 0;
5113         struct fusion_context *fusion = NULL;
5114 
5115         /* Reset MSI-X in the kdump kernel */
5116         if (reset_devices) {
5117                 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
5118                 if (pos) {
5119                         pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS,
5120                                              &control);
5121                         if (control & PCI_MSIX_FLAGS_ENABLE) {
5122                                 dev_info(&pdev->dev, "resetting MSI-X\n");
5123                                 pci_write_config_word(pdev,
5124                                                       pos + PCI_MSIX_FLAGS,
5125                                                       control &
5126                                                       ~PCI_MSIX_FLAGS_ENABLE);
5127                         }
5128                 }
5129         }
5130 
5131         /*
5132          * Announce PCI information
5133          */
5134         printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
5135                pdev->vendor, pdev->device, pdev->subsystem_vendor,
5136                pdev->subsystem_device);
5137 
5138         printk("bus %d:slot %d:func %d\n",
5139                pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
5140 
5141         /*
5142          * PCI prepping: enable device set bus mastering and dma mask
5143          */
5144         rval = pci_enable_device_mem(pdev);
5145 
5146         if (rval) {
5147                 return rval;
5148         }
5149 
5150         pci_set_master(pdev);
5151 
5152         if (megasas_set_dma_mask(pdev))
5153                 goto fail_set_dma_mask;
5154 
5155         host = scsi_host_alloc(&megasas_template,
5156                                sizeof(struct megasas_instance));
5157 
5158         if (!host) {
5159                 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
5160                 goto fail_alloc_instance;
5161         }
5162 
5163         instance = (struct megasas_instance *)host->hostdata;
5164         memset(instance, 0, sizeof(*instance));
5165         atomic_set( &instance->fw_reset_no_pci_access, 0 );
5166         instance->pdev = pdev;
5167 
5168         switch (instance->pdev->device) {
5169         case PCI_DEVICE_ID_LSI_FUSION:
5170         case PCI_DEVICE_ID_LSI_PLASMA:
5171         case PCI_DEVICE_ID_LSI_INVADER:
5172         case PCI_DEVICE_ID_LSI_FURY:
5173         {
5174                 instance->ctrl_context_pages =
5175                         get_order(sizeof(struct fusion_context));
5176                 instance->ctrl_context = (void *)__get_free_pages(GFP_KERNEL,
5177                                 instance->ctrl_context_pages);
5178                 if (!instance->ctrl_context) {
5179                         printk(KERN_DEBUG "megasas: Failed to allocate "
5180                                "memory for Fusion context info\n");
5181                         goto fail_alloc_dma_buf;
5182                 }
5183                 fusion = instance->ctrl_context;
5184                 memset(fusion, 0,
5185                         ((1 << PAGE_SHIFT) << instance->ctrl_context_pages));
5186                 INIT_LIST_HEAD(&fusion->cmd_pool);
5187                 spin_lock_init(&fusion->mpt_pool_lock);
5188         }
5189         break;
5190         default: /* For all other supported controllers */
5191 
5192                 instance->producer =
5193                         pci_alloc_consistent(pdev, sizeof(u32),
5194                                              &instance->producer_h);
5195                 instance->consumer =
5196                         pci_alloc_consistent(pdev, sizeof(u32),
5197                                              &instance->consumer_h);
5198 
5199                 if (!instance->producer || !instance->consumer) {
5200                         printk(KERN_DEBUG "megasas: Failed to allocate"
5201                                "memory for producer, consumer\n");
5202                         goto fail_alloc_dma_buf;
5203                 }
5204 
5205                 *instance->producer = 0;
5206                 *instance->consumer = 0;
5207                 break;
5208         }
5209 
5210         /* Crash dump feature related initialisation*/
5211         instance->drv_buf_index = 0;
5212         instance->drv_buf_alloc = 0;
5213         instance->crash_dump_fw_support = 0;
5214         instance->crash_dump_app_support = 0;
5215         instance->fw_crash_state = UNAVAILABLE;
5216         spin_lock_init(&instance->crashdump_lock);
5217         instance->crash_dump_buf = NULL;
5218 
5219         if (!reset_devices)
5220                 instance->crash_dump_buf = pci_alloc_consistent(pdev,
5221                                                 CRASH_DMA_BUF_SIZE,
5222                                                 &instance->crash_dump_h);
5223         if (!instance->crash_dump_buf)
5224                 dev_err(&instance->pdev->dev, "Can't allocate Firmware "
5225                         "crash dump DMA buffer\n");
5226 
5227         megasas_poll_wait_aen = 0;
5228         instance->flag_ieee = 0;
5229         instance->ev = NULL;
5230         instance->issuepend_done = 1;
5231         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
5232         instance->is_imr = 0;
5233 
5234         instance->evt_detail = pci_alloc_consistent(pdev,
5235                                                     sizeof(struct
5236                                                            megasas_evt_detail),
5237                                                     &instance->evt_detail_h);
5238 
5239         if (!instance->evt_detail) {
5240                 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
5241                        "event detail structure\n");
5242                 goto fail_alloc_dma_buf;
5243         }
5244 
5245         /*
5246          * Initialize locks and queues
5247          */
5248         INIT_LIST_HEAD(&instance->cmd_pool);
5249         INIT_LIST_HEAD(&instance->internal_reset_pending_q);
5250 
5251         atomic_set(&instance->fw_outstanding,0);
5252 
5253         init_waitqueue_head(&instance->int_cmd_wait_q);
5254         init_waitqueue_head(&instance->abort_cmd_wait_q);
5255 
5256         spin_lock_init(&instance->mfi_pool_lock);
5257         spin_lock_init(&instance->hba_lock);
5258         spin_lock_init(&instance->completion_lock);
5259 
5260         mutex_init(&instance->aen_mutex);
5261         mutex_init(&instance->reset_mutex);
5262 
5263         /*
5264          * Initialize PCI related and misc parameters
5265          */
5266         instance->host = host;
5267         instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
5268         instance->init_id = MEGASAS_DEFAULT_INIT_ID;
5269         instance->ctrl_info = NULL;
5270 
5271 
5272         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
5273                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY))
5274                 instance->flag_ieee = 1;
5275 
5276         megasas_dbg_lvl = 0;
5277         instance->flag = 0;
5278         instance->unload = 1;
5279         instance->last_time = 0;
5280         instance->disableOnlineCtrlReset = 1;
5281         instance->UnevenSpanSupport = 0;
5282 
5283         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5284             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5285             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5286             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
5287                 INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
5288                 INIT_WORK(&instance->crash_init, megasas_fusion_crash_dump_wq);
5289         } else
5290                 INIT_WORK(&instance->work_init, process_fw_state_change_wq);
5291 
5292         /*
5293          * Initialize MFI Firmware
5294          */
5295         if (megasas_init_fw(instance))
5296                 goto fail_init_mfi;
5297 
5298         if (instance->requestorId) {
5299                 if (instance->PlasmaFW111) {
5300                         instance->vf_affiliation_111 =
5301                                 pci_alloc_consistent(pdev, sizeof(struct MR_LD_VF_AFFILIATION_111),
5302                                                      &instance->vf_affiliation_111_h);
5303                         if (!instance->vf_affiliation_111)
5304                                 printk(KERN_WARNING "megasas: Can't allocate "
5305                                        "memory for VF affiliation buffer\n");
5306                 } else {
5307                         instance->vf_affiliation =
5308                                 pci_alloc_consistent(pdev,
5309                                                      (MAX_LOGICAL_DRIVES + 1) *
5310                                                      sizeof(struct MR_LD_VF_AFFILIATION),
5311                                                      &instance->vf_affiliation_h);
5312                         if (!instance->vf_affiliation)
5313                                 printk(KERN_WARNING "megasas: Can't allocate "
5314                                        "memory for VF affiliation buffer\n");
5315                 }
5316         }
5317 
5318 retry_irq_register:
5319         /*
5320          * Register IRQ
5321          */
5322         if (instance->msix_vectors) {
5323                 cpu = cpumask_first(cpu_online_mask);
5324                 for (i = 0; i < instance->msix_vectors; i++) {
5325                         instance->irq_context[i].instance = instance;
5326                         instance->irq_context[i].MSIxIndex = i;
5327                         if (request_irq(instance->msixentry[i].vector,
5328                                         instance->instancet->service_isr, 0,
5329                                         "megasas",
5330                                         &instance->irq_context[i])) {
5331                                 printk(KERN_DEBUG "megasas: Failed to "
5332                                        "register IRQ for vector %d.\n", i);
5333                                 for (j = 0; j < i; j++) {
5334                                         if (smp_affinity_enable)
5335                                                 irq_set_affinity_hint(
5336                                                         instance->msixentry[j].vector, NULL);
5337                                         free_irq(
5338                                                 instance->msixentry[j].vector,
5339                                                 &instance->irq_context[j]);
5340                                 }
5341                                 /* Retry irq register for IO_APIC */
5342                                 instance->msix_vectors = 0;
5343                                 goto retry_irq_register;
5344                         }
5345                         if (smp_affinity_enable) {
5346                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5347                                         get_cpu_mask(cpu)))
5348                                         dev_err(&instance->pdev->dev,
5349                                                 "Error setting affinity hint "
5350                                                 "for cpu %d\n", cpu);
5351                                 cpu = cpumask_next(cpu, cpu_online_mask);
5352                         }
5353                 }
5354         } else {
5355                 instance->irq_context[0].instance = instance;
5356                 instance->irq_context[0].MSIxIndex = 0;
5357                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5358                                 IRQF_SHARED, "megasas",
5359                                 &instance->irq_context[0])) {
5360                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5361                         goto fail_irq;
5362                 }
5363         }
5364 
5365         instance->instancet->enable_intr(instance);
5366 
5367         /*
5368          * Store instance in PCI softstate
5369          */
5370         pci_set_drvdata(pdev, instance);
5371 
5372         /*
5373          * Add this controller to megasas_mgmt_info structure so that it
5374          * can be exported to management applications
5375          */
5376         megasas_mgmt_info.count++;
5377         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
5378         megasas_mgmt_info.max_index++;
5379 
5380         /*
5381          * Register with SCSI mid-layer
5382          */
5383         if (megasas_io_attach(instance))
5384                 goto fail_io_attach;
5385 
5386         instance->unload = 0;
5387         /*
5388          * Trigger SCSI to scan our drives
5389          */
5390         scsi_scan_host(host);
5391 
5392         /*
5393          * Initiate AEN (Asynchronous Event Notification)
5394          */
5395         if (megasas_start_aen(instance)) {
5396                 printk(KERN_DEBUG "megasas: start aen failed\n");
5397                 goto fail_start_aen;
5398         }
5399 
5400         /* Get current SR-IOV LD/VF affiliation */
5401         if (instance->requestorId)
5402                 megasas_get_ld_vf_affiliation(instance, 1);
5403 
5404         return 0;
5405 
5406       fail_start_aen:
5407       fail_io_attach:
5408         megasas_mgmt_info.count--;
5409         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
5410         megasas_mgmt_info.max_index--;
5411 
5412         instance->instancet->disable_intr(instance);
5413         if (instance->msix_vectors)
5414                 for (i = 0; i < instance->msix_vectors; i++) {
5415                         if (smp_affinity_enable)
5416                                 irq_set_affinity_hint(
5417                                         instance->msixentry[i].vector, NULL);
5418                         free_irq(instance->msixentry[i].vector,
5419                                  &instance->irq_context[i]);
5420                 }
5421         else
5422                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5423 fail_irq:
5424         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5425             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5426             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5427             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
5428                 megasas_release_fusion(instance);
5429         else
5430                 megasas_release_mfi(instance);
5431       fail_init_mfi:
5432         if (instance->msix_vectors)
5433                 pci_disable_msix(instance->pdev);
5434       fail_alloc_dma_buf:
5435         if (instance->evt_detail)
5436                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5437                                     instance->evt_detail,
5438                                     instance->evt_detail_h);
5439 
5440         if (instance->producer)
5441                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5442                                     instance->producer_h);
5443         if (instance->consumer)
5444                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5445                                     instance->consumer_h);
5446         scsi_host_put(host);
5447 
5448       fail_alloc_instance:
5449       fail_set_dma_mask:
5450         pci_disable_device(pdev);
5451 
5452         return -ENODEV;
5453 }
5454 
5455 /**
5456  * megasas_flush_cache -        Requests FW to flush all its caches
5457  * @instance:                   Adapter soft state
5458  */
5459 static void megasas_flush_cache(struct megasas_instance *instance)
5460 {
5461         struct megasas_cmd *cmd;
5462         struct megasas_dcmd_frame *dcmd;
5463 
5464         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5465                 return;
5466 
5467         cmd = megasas_get_cmd(instance);
5468 
5469         if (!cmd)
5470                 return;
5471 
5472         dcmd = &cmd->frame->dcmd;
5473 
5474         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5475 
5476         dcmd->cmd = MFI_CMD_DCMD;
5477         dcmd->cmd_status = 0x0;
5478         dcmd->sge_count = 0;
5479         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5480         dcmd->timeout = 0;
5481         dcmd->pad_0 = 0;
5482         dcmd->data_xfer_len = 0;
5483         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_CACHE_FLUSH);
5484         dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
5485 
5486         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5487                 dev_err(&instance->pdev->dev, "Command timedout"
5488                         " from %s\n", __func__);
5489 
5490         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5491                 megasas_return_mfi_mpt_pthr(instance, cmd,
5492                         cmd->mpt_pthr_cmd_blocked);
5493         else
5494                 megasas_return_cmd(instance, cmd);
5495 
5496         return;
5497 }
5498 
5499 /**
5500  * megasas_shutdown_controller -        Instructs FW to shutdown the controller
5501  * @instance:                           Adapter soft state
5502  * @opcode:                             Shutdown/Hibernate
5503  */
5504 static void megasas_shutdown_controller(struct megasas_instance *instance,
5505                                         u32 opcode)
5506 {
5507         struct megasas_cmd *cmd;
5508         struct megasas_dcmd_frame *dcmd;
5509 
5510         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5511                 return;
5512 
5513         cmd = megasas_get_cmd(instance);
5514 
5515         if (!cmd)
5516                 return;
5517 
5518         if (instance->aen_cmd)
5519                 megasas_issue_blocked_abort_cmd(instance,
5520                         instance->aen_cmd, 30);
5521         if (instance->map_update_cmd)
5522                 megasas_issue_blocked_abort_cmd(instance,
5523                         instance->map_update_cmd, 30);
5524         dcmd = &cmd->frame->dcmd;
5525 
5526         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5527 
5528         dcmd->cmd = MFI_CMD_DCMD;
5529         dcmd->cmd_status = 0x0;
5530         dcmd->sge_count = 0;
5531         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5532         dcmd->timeout = 0;
5533         dcmd->pad_0 = 0;
5534         dcmd->data_xfer_len = 0;
5535         dcmd->opcode = cpu_to_le32(opcode);
5536 
5537         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5538                 dev_err(&instance->pdev->dev, "Command timedout"
5539                         "from %s\n", __func__);
5540 
5541         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5542                 megasas_return_mfi_mpt_pthr(instance, cmd,
5543                         cmd->mpt_pthr_cmd_blocked);
5544         else
5545                 megasas_return_cmd(instance, cmd);
5546 
5547         return;
5548 }
5549 
5550 #ifdef CONFIG_PM
5551 /**
5552  * megasas_suspend -    driver suspend entry point
5553  * @pdev:               PCI device structure
5554  * @state:              PCI power state to suspend routine
5555  */
5556 static int
5557 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
5558 {
5559         struct Scsi_Host *host;
5560         struct megasas_instance *instance;
5561         int i;
5562 
5563         instance = pci_get_drvdata(pdev);
5564         host = instance->host;
5565         instance->unload = 1;
5566 
5567         /* Shutdown SR-IOV heartbeat timer */
5568         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5569                 del_timer_sync(&instance->sriov_heartbeat_timer);
5570 
5571         megasas_flush_cache(instance);
5572         megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
5573 
5574         /* cancel the delayed work if this work still in queue */
5575         if (instance->ev != NULL) {
5576                 struct megasas_aen_event *ev = instance->ev;
5577                 cancel_delayed_work_sync(&ev->hotplug_work);
5578                 instance->ev = NULL;
5579         }
5580 
5581         tasklet_kill(&instance->isr_tasklet);
5582 
5583         pci_set_drvdata(instance->pdev, instance);
5584         instance->instancet->disable_intr(instance);
5585 
5586         if (instance->msix_vectors)
5587                 for (i = 0; i < instance->msix_vectors; i++) {
5588                         if (smp_affinity_enable)
5589                                 irq_set_affinity_hint(
5590                                         instance->msixentry[i].vector, NULL);
5591                         free_irq(instance->msixentry[i].vector,
5592                                  &instance->irq_context[i]);
5593                 }
5594         else
5595                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5596         if (instance->msix_vectors)
5597                 pci_disable_msix(instance->pdev);
5598 
5599         pci_save_state(pdev);
5600         pci_disable_device(pdev);
5601 
5602         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5603 
5604         return 0;
5605 }
5606 
5607 /**
5608  * megasas_resume-      driver resume entry point
5609  * @pdev:               PCI device structure
5610  */
5611 static int
5612 megasas_resume(struct pci_dev *pdev)
5613 {
5614         int rval, i, j, cpu;
5615         struct Scsi_Host *host;
5616         struct megasas_instance *instance;
5617 
5618         instance = pci_get_drvdata(pdev);
5619         host = instance->host;
5620         pci_set_power_state(pdev, PCI_D0);
5621         pci_enable_wake(pdev, PCI_D0, 0);
5622         pci_restore_state(pdev);
5623 
5624         /*
5625          * PCI prepping: enable device set bus mastering and dma mask
5626          */
5627         rval = pci_enable_device_mem(pdev);
5628 
5629         if (rval) {
5630                 printk(KERN_ERR "megasas: Enable device failed\n");
5631                 return rval;
5632         }
5633 
5634         pci_set_master(pdev);
5635 
5636         if (megasas_set_dma_mask(pdev))
5637                 goto fail_set_dma_mask;
5638 
5639         /*
5640          * Initialize MFI Firmware
5641          */
5642 
5643         atomic_set(&instance->fw_outstanding, 0);
5644 
5645         /*
5646          * We expect the FW state to be READY
5647          */
5648         if (megasas_transition_to_ready(instance, 0))
5649                 goto fail_ready_state;
5650 
5651         /* Now re-enable MSI-X */
5652         if (instance->msix_vectors &&
5653             pci_enable_msix_exact(instance->pdev, instance->msixentry,
5654                                   instance->msix_vectors))
5655                 goto fail_reenable_msix;
5656 
5657         switch (instance->pdev->device) {
5658         case PCI_DEVICE_ID_LSI_FUSION:
5659         case PCI_DEVICE_ID_LSI_PLASMA:
5660         case PCI_DEVICE_ID_LSI_INVADER:
5661         case PCI_DEVICE_ID_LSI_FURY:
5662         {
5663                 megasas_reset_reply_desc(instance);
5664                 if (megasas_ioc_init_fusion(instance)) {
5665                         megasas_free_cmds(instance);
5666                         megasas_free_cmds_fusion(instance);
5667                         goto fail_init_mfi;
5668                 }
5669                 if (!megasas_get_map_info(instance))
5670                         megasas_sync_map_info(instance);
5671         }
5672         break;
5673         default:
5674                 *instance->producer = 0;
5675                 *instance->consumer = 0;
5676                 if (megasas_issue_init_mfi(instance))
5677                         goto fail_init_mfi;
5678                 break;
5679         }
5680 
5681         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
5682                      (unsigned long)instance);
5683 
5684         /*
5685          * Register IRQ
5686          */
5687         if (instance->msix_vectors) {
5688                 cpu = cpumask_first(cpu_online_mask);
5689                 for (i = 0 ; i < instance->msix_vectors; i++) {
5690                         instance->irq_context[i].instance = instance;
5691                         instance->irq_context[i].MSIxIndex = i;
5692                         if (request_irq(instance->msixentry[i].vector,
5693                                         instance->instancet->service_isr, 0,
5694                                         "megasas",
5695                                         &instance->irq_context[i])) {
5696                                 printk(KERN_DEBUG "megasas: Failed to "
5697                                        "register IRQ for vector %d.\n", i);
5698                                 for (j = 0; j < i; j++) {
5699                                         if (smp_affinity_enable)
5700                                                 irq_set_affinity_hint(
5701                                                         instance->msixentry[j].vector, NULL);
5702                                         free_irq(
5703                                                 instance->msixentry[j].vector,
5704                                                 &instance->irq_context[j]);
5705                                 }
5706                                 goto fail_irq;
5707                         }
5708 
5709                         if (smp_affinity_enable) {
5710                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5711                                         get_cpu_mask(cpu)))
5712                                         dev_err(&instance->pdev->dev, "Error "
5713                                                 "setting affinity hint for cpu "
5714                                                 "%d\n", cpu);
5715                                 cpu = cpumask_next(cpu, cpu_online_mask);
5716                         }
5717                 }
5718         } else {
5719                 instance->irq_context[0].instance = instance;
5720                 instance->irq_context[0].MSIxIndex = 0;
5721                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5722                                 IRQF_SHARED, "megasas",
5723                                 &instance->irq_context[0])) {
5724                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5725                         goto fail_irq;
5726                 }
5727         }
5728 
5729         /* Re-launch SR-IOV heartbeat timer */
5730         if (instance->requestorId) {
5731                 if (!megasas_sriov_start_heartbeat(instance, 0))
5732                         megasas_start_timer(instance,
5733                                             &instance->sriov_heartbeat_timer,
5734                                             megasas_sriov_heartbeat_handler,
5735                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
5736                 else
5737                         instance->skip_heartbeat_timer_del = 1;
5738         }
5739 
5740         instance->instancet->enable_intr(instance);
5741         instance->unload = 0;
5742 
5743         /*
5744          * Initiate AEN (Asynchronous Event Notification)
5745          */
5746         if (megasas_start_aen(instance))
5747                 printk(KERN_ERR "megasas: Start AEN failed\n");
5748 
5749         return 0;
5750 
5751 fail_irq:
5752 fail_init_mfi:
5753         if (instance->evt_detail)
5754                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5755                                 instance->evt_detail,
5756                                 instance->evt_detail_h);
5757 
5758         if (instance->producer)
5759                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5760                                 instance->producer_h);
5761         if (instance->consumer)
5762                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5763                                 instance->consumer_h);
5764         scsi_host_put(host);
5765 
5766 fail_set_dma_mask:
5767 fail_ready_state:
5768 fail_reenable_msix:
5769 
5770         pci_disable_device(pdev);
5771 
5772         return -ENODEV;
5773 }
5774 #else
5775 #define megasas_suspend NULL
5776 #define megasas_resume  NULL
5777 #endif
5778 
5779 /**
5780  * megasas_detach_one - PCI hot"un"plug entry point
5781  * @pdev:               PCI device structure
5782  */
5783 static void megasas_detach_one(struct pci_dev *pdev)
5784 {
5785         int i;
5786         struct Scsi_Host *host;
5787         struct megasas_instance *instance;
5788         struct fusion_context *fusion;
5789 
5790         instance = pci_get_drvdata(pdev);
5791         instance->unload = 1;
5792         host = instance->host;
5793         fusion = instance->ctrl_context;
5794 
5795         /* Shutdown SR-IOV heartbeat timer */
5796         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5797                 del_timer_sync(&instance->sriov_heartbeat_timer);
5798 
5799         if (instance->fw_crash_state != UNAVAILABLE)
5800                 megasas_free_host_crash_buffer(instance);
5801         scsi_remove_host(instance->host);
5802         megasas_flush_cache(instance);
5803         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5804 
5805         /* cancel the delayed work if this work still in queue*/
5806         if (instance->ev != NULL) {
5807                 struct megasas_aen_event *ev = instance->ev;
5808                 cancel_delayed_work_sync(&ev->hotplug_work);
5809                 instance->ev = NULL;
5810         }
5811 
5812         /* cancel all wait events */
5813         wake_up_all(&instance->int_cmd_wait_q);
5814 
5815         tasklet_kill(&instance->isr_tasklet);
5816 
5817         /*
5818          * Take the instance off the instance array. Note that we will not
5819          * decrement the max_index. We let this array be sparse array
5820          */
5821         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5822                 if (megasas_mgmt_info.instance[i] == instance) {
5823                         megasas_mgmt_info.count--;
5824                         megasas_mgmt_info.instance[i] = NULL;
5825 
5826                         break;
5827                 }
5828         }
5829 
5830         instance->instancet->disable_intr(instance);
5831 
5832         if (instance->msix_vectors)
5833                 for (i = 0; i < instance->msix_vectors; i++) {
5834                         if (smp_affinity_enable)
5835                                 irq_set_affinity_hint(
5836                                         instance->msixentry[i].vector, NULL);
5837                         free_irq(instance->msixentry[i].vector,
5838                                  &instance->irq_context[i]);
5839                 }
5840         else
5841                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5842         if (instance->msix_vectors)
5843                 pci_disable_msix(instance->pdev);
5844 
5845         switch (instance->pdev->device) {
5846         case PCI_DEVICE_ID_LSI_FUSION:
5847         case PCI_DEVICE_ID_LSI_PLASMA:
5848         case PCI_DEVICE_ID_LSI_INVADER:
5849         case PCI_DEVICE_ID_LSI_FURY:
5850                 megasas_release_fusion(instance);
5851                 for (i = 0; i < 2 ; i++) {
5852                         if (fusion->ld_map[i])
5853                                 dma_free_coherent(&instance->pdev->dev,
5854                                                   fusion->max_map_sz,
5855                                                   fusion->ld_map[i],
5856                                                   fusion->ld_map_phys[i]);
5857                         if (fusion->ld_drv_map[i])
5858                                 free_pages((ulong)fusion->ld_drv_map[i],
5859                                         fusion->drv_map_pages);
5860                 }
5861                 free_pages((ulong)instance->ctrl_context,
5862                         instance->ctrl_context_pages);
5863                 break;
5864         default:
5865                 megasas_release_mfi(instance);
5866                 pci_free_consistent(pdev, sizeof(u32),
5867                                     instance->producer,
5868                                     instance->producer_h);
5869                 pci_free_consistent(pdev, sizeof(u32),
5870                                     instance->consumer,
5871                                     instance->consumer_h);
5872                 break;
5873         }
5874 
5875         kfree(instance->ctrl_info);
5876 
5877         if (instance->evt_detail)
5878                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5879                                 instance->evt_detail, instance->evt_detail_h);
5880 
5881         if (instance->vf_affiliation)
5882                 pci_free_consistent(pdev, (MAX_LOGICAL_DRIVES + 1) *
5883                                     sizeof(struct MR_LD_VF_AFFILIATION),
5884                                     instance->vf_affiliation,
5885                                     instance->vf_affiliation_h);
5886 
5887         if (instance->vf_affiliation_111)
5888                 pci_free_consistent(pdev,
5889                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
5890                                     instance->vf_affiliation_111,
5891                                     instance->vf_affiliation_111_h);
5892 
5893         if (instance->hb_host_mem)
5894                 pci_free_consistent(pdev, sizeof(struct MR_CTRL_HB_HOST_MEM),
5895                                     instance->hb_host_mem,
5896                                     instance->hb_host_mem_h);
5897 
5898         if (instance->crash_dump_buf)
5899                 pci_free_consistent(pdev, CRASH_DMA_BUF_SIZE,
5900                             instance->crash_dump_buf, instance->crash_dump_h);
5901 
5902         scsi_host_put(host);
5903 
5904         pci_disable_device(pdev);
5905 
5906         return;
5907 }
5908 
5909 /**
5910  * megasas_shutdown -   Shutdown entry point
5911  * @device:             Generic device structure
5912  */
5913 static void megasas_shutdown(struct pci_dev *pdev)
5914 {
5915         int i;
5916         struct megasas_instance *instance = pci_get_drvdata(pdev);
5917 
5918         instance->unload = 1;
5919         megasas_flush_cache(instance);
5920         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5921         instance->instancet->disable_intr(instance);
5922         if (instance->msix_vectors)
5923                 for (i = 0; i < instance->msix_vectors; i++) {
5924                         if (smp_affinity_enable)
5925                                 irq_set_affinity_hint(
5926                                         instance->msixentry[i].vector, NULL);
5927                         free_irq(instance->msixentry[i].vector,
5928                                  &instance->irq_context[i]);
5929                 }
5930         else
5931                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5932         if (instance->msix_vectors)
5933                 pci_disable_msix(instance->pdev);
5934 }
5935 
5936 /**
5937  * megasas_mgmt_open -  char node "open" entry point
5938  */
5939 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
5940 {
5941         /*
5942          * Allow only those users with admin rights
5943          */
5944         if (!capable(CAP_SYS_ADMIN))
5945                 return -EACCES;
5946 
5947         return 0;
5948 }
5949 
5950 /**
5951  * megasas_mgmt_fasync -        Async notifier registration from applications
5952  *
5953  * This function adds the calling process to a driver global queue. When an
5954  * event occurs, SIGIO will be sent to all processes in this queue.
5955  */
5956 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
5957 {
5958         int rc;
5959 
5960         mutex_lock(&megasas_async_queue_mutex);
5961 
5962         rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
5963 
5964         mutex_unlock(&megasas_async_queue_mutex);
5965 
5966         if (rc >= 0) {
5967                 /* For sanity check when we get ioctl */
5968                 filep->private_data = filep;
5969                 return 0;
5970         }
5971 
5972         printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
5973 
5974         return rc;
5975 }
5976 
5977 /**
5978  * megasas_mgmt_poll -  char node "poll" entry point
5979  * */
5980 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
5981 {
5982         unsigned int mask;
5983         unsigned long flags;
5984         poll_wait(file, &megasas_poll_wait, wait);
5985         spin_lock_irqsave(&poll_aen_lock, flags);
5986         if (megasas_poll_wait_aen)
5987                 mask =   (POLLIN | POLLRDNORM);
5988 
5989         else
5990                 mask = 0;
5991         megasas_poll_wait_aen = 0;
5992         spin_unlock_irqrestore(&poll_aen_lock, flags);
5993         return mask;
5994 }
5995 
5996 /*
5997  * megasas_set_crash_dump_params_ioctl:
5998  *              Send CRASH_DUMP_MODE DCMD to all controllers
5999  * @cmd:        MFI command frame
6000  */
6001 
6002 static int megasas_set_crash_dump_params_ioctl(
6003         struct megasas_cmd *cmd)
6004 {
6005         struct megasas_instance *local_instance;
6006         int i, error = 0;
6007         int crash_support;
6008 
6009         crash_support = cmd->frame->dcmd.mbox.w[0];
6010 
6011         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
6012                 local_instance = megasas_mgmt_info.instance[i];
6013                 if (local_instance && local_instance->crash_dump_drv_support) {
6014                         if ((local_instance->adprecovery ==
6015                                 MEGASAS_HBA_OPERATIONAL) &&
6016                                 !megasas_set_crash_dump_params(local_instance,
6017                                         crash_support)) {
6018                                 local_instance->crash_dump_app_support =
6019                                         crash_support;
6020                                 dev_info(&local_instance->pdev->dev,
6021                                         "Application firmware crash "
6022                                         "dump mode set success\n");
6023                                 error = 0;
6024                         } else {
6025                                 dev_info(&local_instance->pdev->dev,
6026                                         "Application firmware crash "
6027                                         "dump mode set failed\n");
6028                                 error = -1;
6029                         }
6030                 }
6031         }
6032         return error;
6033 }
6034 
6035 /**
6036  * megasas_mgmt_fw_ioctl -      Issues management ioctls to FW
6037  * @instance:                   Adapter soft state
6038  * @argp:                       User's ioctl packet
6039  */
6040 static int
6041 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
6042                       struct megasas_iocpacket __user * user_ioc,
6043                       struct megasas_iocpacket *ioc)
6044 {
6045         struct megasas_sge32 *kern_sge32;
6046         struct megasas_cmd *cmd;
6047         void *kbuff_arr[MAX_IOCTL_SGE];
6048         dma_addr_t buf_handle = 0;
6049         int error = 0, i;
6050         void *sense = NULL;
6051         dma_addr_t sense_handle;
6052         unsigned long *sense_ptr;
6053 
6054         memset(kbuff_arr, 0, sizeof(kbuff_arr));
6055 
6056         if (ioc->sge_count > MAX_IOCTL_SGE) {
6057                 printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
6058                        ioc->sge_count, MAX_IOCTL_SGE);
6059                 return -EINVAL;
6060         }
6061 
6062         cmd = megasas_get_cmd(instance);
6063         if (!cmd) {
6064                 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
6065                 return -ENOMEM;
6066         }
6067 
6068         /*
6069          * User's IOCTL packet has 2 frames (maximum). Copy those two
6070          * frames into our cmd's frames. cmd->frame's context will get
6071          * overwritten when we copy from user's frames. So set that value
6072          * alone separately
6073          */
6074         memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
6075         cmd->frame->hdr.context = cpu_to_le32(cmd->index);
6076         cmd->frame->hdr.pad_0 = 0;
6077         cmd->frame->hdr.flags &= cpu_to_le16(~(MFI_FRAME_IEEE |
6078                                                MFI_FRAME_SGL64 |
6079                                                MFI_FRAME_SENSE64));
6080 
6081         if (cmd->frame->dcmd.opcode == MR_DRIVER_SET_APP_CRASHDUMP_MODE) {
6082                 error = megasas_set_crash_dump_params_ioctl(cmd);
6083                 megasas_return_cmd(instance, cmd);
6084                 return error;
6085         }
6086 
6087         /*
6088          * The management interface between applications and the fw uses
6089          * MFI frames. E.g, RAID configuration changes, LD property changes
6090          * etc are accomplishes through different kinds of MFI frames. The
6091          * driver needs to care only about substituting user buffers with
6092          * kernel buffers in SGLs. The location of SGL is embedded in the
6093          * struct iocpacket itself.
6094          */
6095         kern_sge32 = (struct megasas_sge32 *)
6096             ((unsigned long)cmd->frame + ioc->sgl_off);
6097 
6098         /*
6099          * For each user buffer, create a mirror buffer and copy in
6100          */
6101         for (i = 0; i < ioc->sge_count; i++) {
6102                 if (!ioc->sgl[i].iov_len)
6103                         continue;
6104 
6105                 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
6106                                                     ioc->sgl[i].iov_len,
6107                                                     &buf_handle, GFP_KERNEL);
6108                 if (!kbuff_arr[i]) {
6109                         printk(KERN_DEBUG "megasas: Failed to alloc "
6110                                "kernel SGL buffer for IOCTL \n");
6111                         error = -ENOMEM;
6112                         goto out;
6113                 }
6114 
6115                 /*
6116                  * We don't change the dma_coherent_mask, so
6117                  * pci_alloc_consistent only returns 32bit addresses
6118                  */
6119                 kern_sge32[i].phys_addr = cpu_to_le32(buf_handle);
6120                 kern_sge32[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
6121 
6122                 /*
6123                  * We created a kernel buffer corresponding to the
6124                  * user buffer. Now copy in from the user buffer
6125                  */
6126                 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
6127                                    (u32) (ioc->sgl[i].iov_len))) {
6128                         error = -EFAULT;
6129                         goto out;
6130                 }
6131         }
6132 
6133         if (ioc->sense_len) {
6134                 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
6135                                              &sense_handle, GFP_KERNEL);
6136                 if (!sense) {
6137                         error = -ENOMEM;
6138                         goto out;
6139                 }
6140 
6141                 sense_ptr =
6142                 (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
6143                 *sense_ptr = cpu_to_le32(sense_handle);
6144         }
6145 
6146         /*
6147          * Set the sync_cmd flag so that the ISR knows not to complete this
6148          * cmd to the SCSI mid-layer
6149          */
6150         cmd->sync_cmd = 1;
6151         megasas_issue_blocked_cmd(instance, cmd, 0);
6152         cmd->sync_cmd = 0;
6153 
6154         if (instance->unload == 1) {
6155                 dev_info(&instance->pdev->dev, "Driver unload is in progress "
6156                         "don't submit data to application\n");
6157                 goto out;
6158         }
6159         /*
6160          * copy out the kernel buffers to user buffers
6161          */
6162         for (i = 0; i < ioc->sge_count; i++) {
6163                 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
6164                                  ioc->sgl[i].iov_len)) {
6165                         error = -EFAULT;
6166                         goto out;
6167                 }
6168         }
6169 
6170         /*
6171          * copy out the sense
6172          */
6173         if (ioc->sense_len) {
6174                 /*
6175                  * sense_ptr points to the location that has the user
6176                  * sense buffer address
6177                  */
6178                 sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
6179                                 ioc->sense_off);
6180 
6181                 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
6182                                  sense, ioc->sense_len)) {
6183                         printk(KERN_ERR "megasas: Failed to copy out to user "
6184                                         "sense data\n");
6185                         error = -EFAULT;
6186                         goto out;
6187                 }
6188         }
6189 
6190         /*
6191          * copy the status codes returned by the fw
6192          */
6193         if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
6194                          &cmd->frame->hdr.cmd_status, sizeof(u8))) {
6195                 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
6196                 error = -EFAULT;
6197         }
6198 
6199       out:
6200         if (sense) {
6201                 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
6202                                     sense, sense_handle);
6203         }
6204 
6205         for (i = 0; i < ioc->sge_count; i++) {
6206                 if (kbuff_arr[i])
6207                         dma_free_coherent(&instance->pdev->dev,
6208                                           le32_to_cpu(kern_sge32[i].length),
6209                                           kbuff_arr[i],
6210                                           le32_to_cpu(kern_sge32[i].phys_addr));
6211                         kbuff_arr[i] = NULL;
6212         }
6213 
6214         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
6215                 megasas_return_mfi_mpt_pthr(instance, cmd,
6216                         cmd->mpt_pthr_cmd_blocked);
6217         else
6218                 megasas_return_cmd(instance, cmd);
6219         return error;
6220 }
6221 
6222 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
6223 {
6224         struct megasas_iocpacket __user *user_ioc =
6225             (struct megasas_iocpacket __user *)arg;
6226         struct megasas_iocpacket *ioc;
6227         struct megasas_instance *instance;
6228         int error;
6229         int i;
6230         unsigned long flags;
6231         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6232 
6233         ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6234         if (!ioc)
6235                 return -ENOMEM;
6236 
6237         if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
6238                 error = -EFAULT;
6239                 goto out_kfree_ioc;
6240         }
6241 
6242         instance = megasas_lookup_instance(ioc->host_no);
6243         if (!instance) {
6244                 error = -ENODEV;
6245                 goto out_kfree_ioc;
6246         }
6247 
6248         /* Adjust ioctl wait time for VF mode */
6249         if (instance->requestorId)
6250                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
6251 
6252         /* Block ioctls in VF mode */
6253         if (instance->requestorId && !allow_vf_ioctls) {
6254                 error = -ENODEV;
6255                 goto out_kfree_ioc;
6256         }
6257 
6258         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6259                 printk(KERN_ERR "Controller in crit error\n");
6260                 error = -ENODEV;
6261                 goto out_kfree_ioc;
6262         }
6263 
6264         if (instance->unload == 1) {
6265                 error = -ENODEV;
6266                 goto out_kfree_ioc;
6267         }
6268 
6269         if (down_interruptible(&instance->ioctl_sem)) {
6270                 error = -ERESTARTSYS;
6271                 goto out_kfree_ioc;
6272         }
6273 
6274         for (i = 0; i < wait_time; i++) {
6275 
6276                 spin_lock_irqsave(&instance->hba_lock, flags);
6277                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6278                         spin_unlock_irqrestore(&instance->hba_lock, flags);
6279                         break;
6280                 }
6281                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6282 
6283                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6284                         printk(KERN_NOTICE "megasas: waiting"
6285                                 "for controller reset to finish\n");
6286                 }
6287 
6288                 msleep(1000);
6289         }
6290 
6291         spin_lock_irqsave(&instance->hba_lock, flags);
6292         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6293                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6294 
6295                 printk(KERN_ERR "megaraid_sas: timed out while"
6296                         "waiting for HBA to recover\n");
6297                 error = -ENODEV;
6298                 goto out_up;
6299         }
6300         spin_unlock_irqrestore(&instance->hba_lock, flags);
6301 
6302         error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
6303       out_up:
6304         up(&instance->ioctl_sem);
6305 
6306       out_kfree_ioc:
6307         kfree(ioc);
6308         return error;
6309 }
6310 
6311 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
6312 {
6313         struct megasas_instance *instance;
6314         struct megasas_aen aen;
6315         int error;
6316         int i;
6317         unsigned long flags;
6318         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6319 
6320         if (file->private_data != file) {
6321                 printk(KERN_DEBUG "megasas: fasync_helper was not "
6322                        "called first\n");
6323                 return -EINVAL;
6324         }
6325 
6326         if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
6327                 return -EFAULT;
6328 
6329         instance = megasas_lookup_instance(aen.host_no);
6330 
6331         if (!instance)
6332                 return -ENODEV;
6333 
6334         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6335                 return -ENODEV;
6336         }
6337 
6338         if (instance->unload == 1) {
6339                 return -ENODEV;
6340         }
6341 
6342         for (i = 0; i < wait_time; i++) {
6343 
6344                 spin_lock_irqsave(&instance->hba_lock, flags);
6345                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6346                         spin_unlock_irqrestore(&instance->hba_lock,
6347                                                 flags);
6348                         break;
6349                 }
6350 
6351                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6352 
6353                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6354                         printk(KERN_NOTICE "megasas: waiting for"
6355                                 "controller reset to finish\n");
6356                 }
6357 
6358                 msleep(1000);
6359         }
6360 
6361         spin_lock_irqsave(&instance->hba_lock, flags);
6362         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6363                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6364                 printk(KERN_ERR "megaraid_sas: timed out while waiting"
6365                                 "for HBA to recover.\n");
6366                 return -ENODEV;
6367         }
6368         spin_unlock_irqrestore(&instance->hba_lock, flags);
6369 
6370         mutex_lock(&instance->aen_mutex);
6371         error = megasas_register_aen(instance, aen.seq_num,
6372                                      aen.class_locale_word);
6373         mutex_unlock(&instance->aen_mutex);
6374         return error;
6375 }
6376 
6377 /**
6378  * megasas_mgmt_ioctl - char node ioctl entry point
6379  */
6380 static long
6381 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
6382 {
6383         switch (cmd) {
6384         case MEGASAS_IOC_FIRMWARE:
6385                 return megasas_mgmt_ioctl_fw(file, arg);
6386 
6387         case MEGASAS_IOC_GET_AEN:
6388                 return megasas_mgmt_ioctl_aen(file, arg);
6389         }
6390 
6391         return -ENOTTY;
6392 }
6393 
6394 #ifdef CONFIG_COMPAT
6395 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
6396 {
6397         struct compat_megasas_iocpacket __user *cioc =
6398             (struct compat_megasas_iocpacket __user *)arg;
6399         struct megasas_iocpacket __user *ioc =
6400             compat_alloc_user_space(sizeof(struct megasas_iocpacket));
6401         int i;
6402         int error = 0;
6403         compat_uptr_t ptr;
6404 
6405         if (clear_user(ioc, sizeof(*ioc)))
6406                 return -EFAULT;
6407 
6408         if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
6409             copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
6410             copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
6411             copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
6412             copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
6413             copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
6414                 return -EFAULT;
6415 
6416         /*
6417          * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
6418          * sense_len is not null, so prepare the 64bit value under
6419          * the same condition.
6420          */
6421         if (ioc->sense_len) {
6422                 void __user **sense_ioc_ptr =
6423                         (void __user **)(ioc->frame.raw + ioc->sense_off);
6424                 compat_uptr_t *sense_cioc_ptr =
6425                         (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
6426                 if (get_user(ptr, sense_cioc_ptr) ||
6427                     put_user(compat_ptr(ptr), sense_ioc_ptr))
6428                         return -EFAULT;
6429         }
6430 
6431         for (i = 0; i < MAX_IOCTL_SGE; i++) {
6432                 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
6433                     put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
6434                     copy_in_user(&ioc->sgl[i].iov_len,
6435                                  &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
6436                         return -EFAULT;
6437         }
6438 
6439         error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
6440 
6441         if (copy_in_user(&cioc->frame.hdr.cmd_status,
6442                          &ioc->frame.hdr.cmd_status, sizeof(u8))) {
6443                 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
6444                 return -EFAULT;
6445         }
6446         return error;
6447 }
6448 
6449 static long
6450 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
6451                           unsigned long arg)
6452 {
6453         switch (cmd) {
6454         case MEGASAS_IOC_FIRMWARE32:
6455                 return megasas_mgmt_compat_ioctl_fw(file, arg);
6456         case MEGASAS_IOC_GET_AEN:
6457                 return megasas_mgmt_ioctl_aen(file, arg);
6458         }
6459 
6460         return -ENOTTY;
6461 }
6462 #endif
6463 
6464 /*
6465  * File operations structure for management interface
6466  */
6467 static const struct file_operations megasas_mgmt_fops = {
6468         .owner = THIS_MODULE,
6469         .open = megasas_mgmt_open,
6470         .fasync = megasas_mgmt_fasync,
6471         .unlocked_ioctl = megasas_mgmt_ioctl,
6472         .poll = megasas_mgmt_poll,
6473 #ifdef CONFIG_COMPAT
6474         .compat_ioctl = megasas_mgmt_compat_ioctl,
6475 #endif
6476         .llseek = noop_llseek,
6477 };
6478 
6479 /*
6480  * PCI hotplug support registration structure
6481  */
6482 static struct pci_driver megasas_pci_driver = {
6483 
6484         .name = "megaraid_sas",
6485         .id_table = megasas_pci_table,
6486         .probe = megasas_probe_one,
6487         .remove = megasas_detach_one,
6488         .suspend = megasas_suspend,
6489         .resume = megasas_resume,
6490         .shutdown = megasas_shutdown,
6491 };
6492 
6493 /*
6494  * Sysfs driver attributes
6495  */
6496 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
6497 {
6498         return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
6499                         MEGASAS_VERSION);
6500 }
6501 
6502 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
6503 
6504 static ssize_t
6505 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
6506 {
6507         return sprintf(buf, "%u\n", support_poll_for_event);
6508 }
6509 
6510 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
6511                         megasas_sysfs_show_support_poll_for_event, NULL);
6512 
6513  static ssize_t
6514 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
6515 {
6516         return sprintf(buf, "%u\n", support_device_change);
6517 }
6518 
6519 static DRIVER_ATTR(support_device_change, S_IRUGO,
6520                         megasas_sysfs_show_support_device_change, NULL);
6521 
6522 static ssize_t
6523 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
6524<