Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 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

Linux/drivers/scsi/megaraid/megaraid_sas_base.c

  1 /*
  2  *  Linux MegaRAID driver for SAS based RAID controllers
  3  *
  4  *  Copyright (c) 2003-2012  LSI Corporation.
  5  *
  6  *  This program is free software; you can redistribute it and/or
  7  *  modify it under the terms of the GNU General Public License
  8  *  as published by the Free Software Foundation; either version 2
  9  *  of the License, or (at your option) any later version.
 10  *
 11  *  This program is distributed in the hope that it will be useful,
 12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *  GNU General Public License for more details.
 15  *
 16  *  You should have received a copy of the GNU General Public License
 17  *  along with this program; if not, write to the Free Software
 18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 19  *
 20  *  FILE: megaraid_sas_base.c
 21  *  Version : 06.805.06.00-rc1
 22  *
 23  *  Authors: LSI Corporation
 24  *           Sreenivas Bagalkote
 25  *           Sumant Patro
 26  *           Bo Yang
 27  *           Adam Radford <linuxraid@lsi.com>
 28  *
 29  *  Send feedback to: <megaraidlinux@lsi.com>
 30  *
 31  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
 32  *     ATTN: Linuxraid
 33  */
 34 
 35 #include <linux/kernel.h>
 36 #include <linux/types.h>
 37 #include <linux/pci.h>
 38 #include <linux/list.h>
 39 #include <linux/moduleparam.h>
 40 #include <linux/module.h>
 41 #include <linux/spinlock.h>
 42 #include <linux/interrupt.h>
 43 #include <linux/delay.h>
 44 #include <linux/uio.h>
 45 #include <linux/slab.h>
 46 #include <asm/uaccess.h>
 47 #include <linux/fs.h>
 48 #include <linux/compat.h>
 49 #include <linux/blkdev.h>
 50 #include <linux/mutex.h>
 51 #include <linux/poll.h>
 52 
 53 #include <scsi/scsi.h>
 54 #include <scsi/scsi_cmnd.h>
 55 #include <scsi/scsi_device.h>
 56 #include <scsi/scsi_host.h>
 57 #include <scsi/scsi_tcq.h>
 58 #include "megaraid_sas_fusion.h"
 59 #include "megaraid_sas.h"
 60 
 61 /*
 62  * Number of sectors per IO command
 63  * Will be set in megasas_init_mfi if user does not provide
 64  */
 65 static unsigned int max_sectors;
 66 module_param_named(max_sectors, max_sectors, int, 0);
 67 MODULE_PARM_DESC(max_sectors,
 68         "Maximum number of sectors per IO command");
 69 
 70 static int msix_disable;
 71 module_param(msix_disable, int, S_IRUGO);
 72 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
 73 
 74 static unsigned int msix_vectors;
 75 module_param(msix_vectors, int, S_IRUGO);
 76 MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW");
 77 
 78 static int allow_vf_ioctls;
 79 module_param(allow_vf_ioctls, int, S_IRUGO);
 80 MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0");
 81 
 82 static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
 83 module_param(throttlequeuedepth, int, S_IRUGO);
 84 MODULE_PARM_DESC(throttlequeuedepth,
 85         "Adapter queue depth when throttled due to I/O timeout. Default: 16");
 86 
 87 int resetwaittime = MEGASAS_RESET_WAIT_TIME;
 88 module_param(resetwaittime, int, S_IRUGO);
 89 MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
 90                  "before resetting adapter. Default: 180");
 91 
 92 int smp_affinity_enable = 1;
 93 module_param(smp_affinity_enable, int, S_IRUGO);
 94 MODULE_PARM_DESC(smp_affinity_enable, "SMP affinity feature enable/disbale Default: enable(1)");
 95 
 96 MODULE_LICENSE("GPL");
 97 MODULE_VERSION(MEGASAS_VERSION);
 98 MODULE_AUTHOR("megaraidlinux@lsi.com");
 99 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
100 
101 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
102 static int megasas_get_pd_list(struct megasas_instance *instance);
103 static int megasas_ld_list_query(struct megasas_instance *instance,
104                                  u8 query_type);
105 static int megasas_issue_init_mfi(struct megasas_instance *instance);
106 static int megasas_register_aen(struct megasas_instance *instance,
107                                 u32 seq_num, u32 class_locale_word);
108 /*
109  * PCI ID table for all supported controllers
110  */
111 static struct pci_device_id megasas_pci_table[] = {
112 
113         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
114         /* xscale IOP */
115         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
116         /* ppc IOP */
117         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
118         /* ppc IOP */
119         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
120         /* gen2*/
121         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
122         /* gen2*/
123         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
124         /* skinny*/
125         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
126         /* skinny*/
127         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
128         /* xscale IOP, vega */
129         {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
130         /* xscale IOP */
131         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
132         /* Fusion */
133         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
134         /* Plasma */
135         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
136         /* Invader */
137         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FURY)},
138         /* Fury */
139         {}
140 };
141 
142 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
143 
144 static int megasas_mgmt_majorno;
145 struct megasas_mgmt_info megasas_mgmt_info;
146 static struct fasync_struct *megasas_async_queue;
147 static DEFINE_MUTEX(megasas_async_queue_mutex);
148 
149 static int megasas_poll_wait_aen;
150 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
151 static u32 support_poll_for_event;
152 u32 megasas_dbg_lvl;
153 static u32 support_device_change;
154 
155 /* define lock for aen poll */
156 spinlock_t poll_aen_lock;
157 
158 void
159 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
160                      u8 alt_status);
161 static u32
162 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
163 static int
164 megasas_adp_reset_gen2(struct megasas_instance *instance,
165                        struct megasas_register_set __iomem *reg_set);
166 static irqreturn_t megasas_isr(int irq, void *devp);
167 static u32
168 megasas_init_adapter_mfi(struct megasas_instance *instance);
169 u32
170 megasas_build_and_issue_cmd(struct megasas_instance *instance,
171                             struct scsi_cmnd *scmd);
172 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
173 void
174 megasas_release_fusion(struct megasas_instance *instance);
175 int
176 megasas_ioc_init_fusion(struct megasas_instance *instance);
177 void
178 megasas_free_cmds_fusion(struct megasas_instance *instance);
179 u8
180 megasas_get_map_info(struct megasas_instance *instance);
181 int
182 megasas_sync_map_info(struct megasas_instance *instance);
183 int
184 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
185         int seconds);
186 void megasas_reset_reply_desc(struct megasas_instance *instance);
187 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout);
188 void megasas_fusion_ocr_wq(struct work_struct *work);
189 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
190                                          int initial);
191 int megasas_check_mpio_paths(struct megasas_instance *instance,
192                              struct scsi_cmnd *scmd);
193 
194 void
195 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
196 {
197         instance->instancet->fire_cmd(instance,
198                 cmd->frame_phys_addr, 0, instance->reg_set);
199 }
200 
201 /**
202  * megasas_get_cmd -    Get a command from the free pool
203  * @instance:           Adapter soft state
204  *
205  * Returns a free command from the pool
206  */
207 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
208                                                   *instance)
209 {
210         unsigned long flags;
211         struct megasas_cmd *cmd = NULL;
212 
213         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
214 
215         if (!list_empty(&instance->cmd_pool)) {
216                 cmd = list_entry((&instance->cmd_pool)->next,
217                                  struct megasas_cmd, list);
218                 list_del_init(&cmd->list);
219                 atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_DETACHED);
220         } else {
221                 printk(KERN_ERR "megasas: Command pool empty!\n");
222         }
223 
224         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
225         return cmd;
226 }
227 
228 /**
229  * __megasas_return_cmd -       Return a cmd to free command pool
230  * @instance:           Adapter soft state
231  * @cmd:                Command packet to be returned to free command pool
232  */
233 inline void
234 __megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
235 {
236         /*
237          * Don't go ahead and free the MFI frame, if corresponding
238          * MPT frame is not freed(valid for only fusion adapters).
239          * In case of MFI adapters, anyways for any allocated MFI
240          * frame will have cmd->mfi_mpt_mpthr set to MFI_MPT_DETACHED
241          */
242         if (atomic_read(&cmd->mfi_mpt_pthr) != MFI_MPT_DETACHED)
243                 return;
244 
245         cmd->scmd = NULL;
246         cmd->frame_count = 0;
247         cmd->is_wait_event = 0;
248         cmd->mpt_pthr_cmd_blocked = NULL;
249 
250         if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
251             (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
252             (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
253             (reset_devices))
254                 cmd->frame->hdr.cmd = MFI_CMD_INVALID;
255 
256         atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
257         list_add(&cmd->list, (&instance->cmd_pool)->next);
258 }
259 
260 /**
261  * megasas_return_cmd - Return a cmd to free command pool
262  * @instance:           Adapter soft state
263  * @cmd:                Command packet to be returned to free command pool
264  */
265 inline void
266 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
267 {
268         unsigned long flags;
269 
270         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
271         __megasas_return_cmd(instance, cmd);
272         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
273 }
274 
275 
276 /**
277 *       The following functions are defined for xscale
278 *       (deviceid : 1064R, PERC5) controllers
279 */
280 
281 /**
282  * megasas_enable_intr_xscale - Enables interrupts
283  * @regs:                       MFI register set
284  */
285 static inline void
286 megasas_enable_intr_xscale(struct megasas_instance *instance)
287 {
288         struct megasas_register_set __iomem *regs;
289         regs = instance->reg_set;
290         writel(0, &(regs)->outbound_intr_mask);
291 
292         /* Dummy readl to force pci flush */
293         readl(&regs->outbound_intr_mask);
294 }
295 
296 /**
297  * megasas_disable_intr_xscale -Disables interrupt
298  * @regs:                       MFI register set
299  */
300 static inline void
301 megasas_disable_intr_xscale(struct megasas_instance *instance)
302 {
303         struct megasas_register_set __iomem *regs;
304         u32 mask = 0x1f;
305         regs = instance->reg_set;
306         writel(mask, &regs->outbound_intr_mask);
307         /* Dummy readl to force pci flush */
308         readl(&regs->outbound_intr_mask);
309 }
310 
311 /**
312  * megasas_read_fw_status_reg_xscale - returns the current FW status value
313  * @regs:                       MFI register set
314  */
315 static u32
316 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
317 {
318         return readl(&(regs)->outbound_msg_0);
319 }
320 /**
321  * megasas_clear_interrupt_xscale -     Check & clear interrupt
322  * @regs:                               MFI register set
323  */
324 static int
325 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
326 {
327         u32 status;
328         u32 mfiStatus = 0;
329         /*
330          * Check if it is our interrupt
331          */
332         status = readl(&regs->outbound_intr_status);
333 
334         if (status & MFI_OB_INTR_STATUS_MASK)
335                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
336         if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
337                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
338 
339         /*
340          * Clear the interrupt by writing back the same value
341          */
342         if (mfiStatus)
343                 writel(status, &regs->outbound_intr_status);
344 
345         /* Dummy readl to force pci flush */
346         readl(&regs->outbound_intr_status);
347 
348         return mfiStatus;
349 }
350 
351 /**
352  * megasas_fire_cmd_xscale -    Sends command to the FW
353  * @frame_phys_addr :           Physical address of cmd
354  * @frame_count :               Number of frames for the command
355  * @regs :                      MFI register set
356  */
357 static inline void
358 megasas_fire_cmd_xscale(struct megasas_instance *instance,
359                 dma_addr_t frame_phys_addr,
360                 u32 frame_count,
361                 struct megasas_register_set __iomem *regs)
362 {
363         unsigned long flags;
364         spin_lock_irqsave(&instance->hba_lock, flags);
365         writel((frame_phys_addr >> 3)|(frame_count),
366                &(regs)->inbound_queue_port);
367         spin_unlock_irqrestore(&instance->hba_lock, flags);
368 }
369 
370 /**
371  * megasas_adp_reset_xscale -  For controller reset
372  * @regs:                              MFI register set
373  */
374 static int
375 megasas_adp_reset_xscale(struct megasas_instance *instance,
376         struct megasas_register_set __iomem *regs)
377 {
378         u32 i;
379         u32 pcidata;
380         writel(MFI_ADP_RESET, &regs->inbound_doorbell);
381 
382         for (i = 0; i < 3; i++)
383                 msleep(1000); /* sleep for 3 secs */
384         pcidata  = 0;
385         pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
386         printk(KERN_NOTICE "pcidata = %x\n", pcidata);
387         if (pcidata & 0x2) {
388                 printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
389                 pcidata &= ~0x2;
390                 pci_write_config_dword(instance->pdev,
391                                 MFI_1068_PCSR_OFFSET, pcidata);
392 
393                 for (i = 0; i < 2; i++)
394                         msleep(1000); /* need to wait 2 secs again */
395 
396                 pcidata  = 0;
397                 pci_read_config_dword(instance->pdev,
398                                 MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
399                 printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
400                 if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
401                         printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
402                         pcidata = 0;
403                         pci_write_config_dword(instance->pdev,
404                                 MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
405                 }
406         }
407         return 0;
408 }
409 
410 /**
411  * megasas_check_reset_xscale - For controller reset check
412  * @regs:                               MFI register set
413  */
414 static int
415 megasas_check_reset_xscale(struct megasas_instance *instance,
416                 struct megasas_register_set __iomem *regs)
417 {
418 
419         if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
420             (le32_to_cpu(*instance->consumer) ==
421                 MEGASAS_ADPRESET_INPROG_SIGN))
422                 return 1;
423         return 0;
424 }
425 
426 static struct megasas_instance_template megasas_instance_template_xscale = {
427 
428         .fire_cmd = megasas_fire_cmd_xscale,
429         .enable_intr = megasas_enable_intr_xscale,
430         .disable_intr = megasas_disable_intr_xscale,
431         .clear_intr = megasas_clear_intr_xscale,
432         .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
433         .adp_reset = megasas_adp_reset_xscale,
434         .check_reset = megasas_check_reset_xscale,
435         .service_isr = megasas_isr,
436         .tasklet = megasas_complete_cmd_dpc,
437         .init_adapter = megasas_init_adapter_mfi,
438         .build_and_issue_cmd = megasas_build_and_issue_cmd,
439         .issue_dcmd = megasas_issue_dcmd,
440 };
441 
442 /**
443 *       This is the end of set of functions & definitions specific
444 *       to xscale (deviceid : 1064R, PERC5) controllers
445 */
446 
447 /**
448 *       The following functions are defined for ppc (deviceid : 0x60)
449 *       controllers
450 */
451 
452 /**
453  * megasas_enable_intr_ppc -    Enables interrupts
454  * @regs:                       MFI register set
455  */
456 static inline void
457 megasas_enable_intr_ppc(struct megasas_instance *instance)
458 {
459         struct megasas_register_set __iomem *regs;
460         regs = instance->reg_set;
461         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
462 
463         writel(~0x80000000, &(regs)->outbound_intr_mask);
464 
465         /* Dummy readl to force pci flush */
466         readl(&regs->outbound_intr_mask);
467 }
468 
469 /**
470  * megasas_disable_intr_ppc -   Disable interrupt
471  * @regs:                       MFI register set
472  */
473 static inline void
474 megasas_disable_intr_ppc(struct megasas_instance *instance)
475 {
476         struct megasas_register_set __iomem *regs;
477         u32 mask = 0xFFFFFFFF;
478         regs = instance->reg_set;
479         writel(mask, &regs->outbound_intr_mask);
480         /* Dummy readl to force pci flush */
481         readl(&regs->outbound_intr_mask);
482 }
483 
484 /**
485  * megasas_read_fw_status_reg_ppc - returns the current FW status value
486  * @regs:                       MFI register set
487  */
488 static u32
489 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
490 {
491         return readl(&(regs)->outbound_scratch_pad);
492 }
493 
494 /**
495  * megasas_clear_interrupt_ppc -        Check & clear interrupt
496  * @regs:                               MFI register set
497  */
498 static int
499 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
500 {
501         u32 status, mfiStatus = 0;
502 
503         /*
504          * Check if it is our interrupt
505          */
506         status = readl(&regs->outbound_intr_status);
507 
508         if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
509                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
510 
511         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
512                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
513 
514         /*
515          * Clear the interrupt by writing back the same value
516          */
517         writel(status, &regs->outbound_doorbell_clear);
518 
519         /* Dummy readl to force pci flush */
520         readl(&regs->outbound_doorbell_clear);
521 
522         return mfiStatus;
523 }
524 
525 /**
526  * megasas_fire_cmd_ppc -       Sends command to the FW
527  * @frame_phys_addr :           Physical address of cmd
528  * @frame_count :               Number of frames for the command
529  * @regs :                      MFI register set
530  */
531 static inline void
532 megasas_fire_cmd_ppc(struct megasas_instance *instance,
533                 dma_addr_t frame_phys_addr,
534                 u32 frame_count,
535                 struct megasas_register_set __iomem *regs)
536 {
537         unsigned long flags;
538         spin_lock_irqsave(&instance->hba_lock, flags);
539         writel((frame_phys_addr | (frame_count<<1))|1,
540                         &(regs)->inbound_queue_port);
541         spin_unlock_irqrestore(&instance->hba_lock, flags);
542 }
543 
544 /**
545  * megasas_check_reset_ppc -    For controller reset check
546  * @regs:                               MFI register set
547  */
548 static int
549 megasas_check_reset_ppc(struct megasas_instance *instance,
550                         struct megasas_register_set __iomem *regs)
551 {
552         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
553                 return 1;
554 
555         return 0;
556 }
557 
558 static struct megasas_instance_template megasas_instance_template_ppc = {
559 
560         .fire_cmd = megasas_fire_cmd_ppc,
561         .enable_intr = megasas_enable_intr_ppc,
562         .disable_intr = megasas_disable_intr_ppc,
563         .clear_intr = megasas_clear_intr_ppc,
564         .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
565         .adp_reset = megasas_adp_reset_xscale,
566         .check_reset = megasas_check_reset_ppc,
567         .service_isr = megasas_isr,
568         .tasklet = megasas_complete_cmd_dpc,
569         .init_adapter = megasas_init_adapter_mfi,
570         .build_and_issue_cmd = megasas_build_and_issue_cmd,
571         .issue_dcmd = megasas_issue_dcmd,
572 };
573 
574 /**
575  * megasas_enable_intr_skinny - Enables interrupts
576  * @regs:                       MFI register set
577  */
578 static inline void
579 megasas_enable_intr_skinny(struct megasas_instance *instance)
580 {
581         struct megasas_register_set __iomem *regs;
582         regs = instance->reg_set;
583         writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
584 
585         writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
586 
587         /* Dummy readl to force pci flush */
588         readl(&regs->outbound_intr_mask);
589 }
590 
591 /**
592  * megasas_disable_intr_skinny -        Disables interrupt
593  * @regs:                       MFI register set
594  */
595 static inline void
596 megasas_disable_intr_skinny(struct megasas_instance *instance)
597 {
598         struct megasas_register_set __iomem *regs;
599         u32 mask = 0xFFFFFFFF;
600         regs = instance->reg_set;
601         writel(mask, &regs->outbound_intr_mask);
602         /* Dummy readl to force pci flush */
603         readl(&regs->outbound_intr_mask);
604 }
605 
606 /**
607  * megasas_read_fw_status_reg_skinny - returns the current FW status value
608  * @regs:                       MFI register set
609  */
610 static u32
611 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
612 {
613         return readl(&(regs)->outbound_scratch_pad);
614 }
615 
616 /**
617  * megasas_clear_interrupt_skinny -     Check & clear interrupt
618  * @regs:                               MFI register set
619  */
620 static int
621 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
622 {
623         u32 status;
624         u32 mfiStatus = 0;
625 
626         /*
627          * Check if it is our interrupt
628          */
629         status = readl(&regs->outbound_intr_status);
630 
631         if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
632                 return 0;
633         }
634 
635         /*
636          * Check if it is our interrupt
637          */
638         if ((megasas_read_fw_status_reg_skinny(regs) & MFI_STATE_MASK) ==
639             MFI_STATE_FAULT) {
640                 mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
641         } else
642                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
643 
644         /*
645          * Clear the interrupt by writing back the same value
646          */
647         writel(status, &regs->outbound_intr_status);
648 
649         /*
650         * dummy read to flush PCI
651         */
652         readl(&regs->outbound_intr_status);
653 
654         return mfiStatus;
655 }
656 
657 /**
658  * megasas_fire_cmd_skinny -    Sends command to the FW
659  * @frame_phys_addr :           Physical address of cmd
660  * @frame_count :               Number of frames for the command
661  * @regs :                      MFI register set
662  */
663 static inline void
664 megasas_fire_cmd_skinny(struct megasas_instance *instance,
665                         dma_addr_t frame_phys_addr,
666                         u32 frame_count,
667                         struct megasas_register_set __iomem *regs)
668 {
669         unsigned long flags;
670         spin_lock_irqsave(&instance->hba_lock, flags);
671         writel(upper_32_bits(frame_phys_addr),
672                &(regs)->inbound_high_queue_port);
673         writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
674                &(regs)->inbound_low_queue_port);
675         spin_unlock_irqrestore(&instance->hba_lock, flags);
676 }
677 
678 /**
679  * megasas_check_reset_skinny - For controller reset check
680  * @regs:                               MFI register set
681  */
682 static int
683 megasas_check_reset_skinny(struct megasas_instance *instance,
684                                 struct megasas_register_set __iomem *regs)
685 {
686         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
687                 return 1;
688 
689         return 0;
690 }
691 
692 static struct megasas_instance_template megasas_instance_template_skinny = {
693 
694         .fire_cmd = megasas_fire_cmd_skinny,
695         .enable_intr = megasas_enable_intr_skinny,
696         .disable_intr = megasas_disable_intr_skinny,
697         .clear_intr = megasas_clear_intr_skinny,
698         .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
699         .adp_reset = megasas_adp_reset_gen2,
700         .check_reset = megasas_check_reset_skinny,
701         .service_isr = megasas_isr,
702         .tasklet = megasas_complete_cmd_dpc,
703         .init_adapter = megasas_init_adapter_mfi,
704         .build_and_issue_cmd = megasas_build_and_issue_cmd,
705         .issue_dcmd = megasas_issue_dcmd,
706 };
707 
708 
709 /**
710 *       The following functions are defined for gen2 (deviceid : 0x78 0x79)
711 *       controllers
712 */
713 
714 /**
715  * megasas_enable_intr_gen2 -  Enables interrupts
716  * @regs:                      MFI register set
717  */
718 static inline void
719 megasas_enable_intr_gen2(struct megasas_instance *instance)
720 {
721         struct megasas_register_set __iomem *regs;
722         regs = instance->reg_set;
723         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
724 
725         /* write ~0x00000005 (4 & 1) to the intr mask*/
726         writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
727 
728         /* Dummy readl to force pci flush */
729         readl(&regs->outbound_intr_mask);
730 }
731 
732 /**
733  * megasas_disable_intr_gen2 - Disables interrupt
734  * @regs:                      MFI register set
735  */
736 static inline void
737 megasas_disable_intr_gen2(struct megasas_instance *instance)
738 {
739         struct megasas_register_set __iomem *regs;
740         u32 mask = 0xFFFFFFFF;
741         regs = instance->reg_set;
742         writel(mask, &regs->outbound_intr_mask);
743         /* Dummy readl to force pci flush */
744         readl(&regs->outbound_intr_mask);
745 }
746 
747 /**
748  * megasas_read_fw_status_reg_gen2 - returns the current FW status value
749  * @regs:                      MFI register set
750  */
751 static u32
752 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
753 {
754         return readl(&(regs)->outbound_scratch_pad);
755 }
756 
757 /**
758  * megasas_clear_interrupt_gen2 -      Check & clear interrupt
759  * @regs:                              MFI register set
760  */
761 static int
762 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
763 {
764         u32 status;
765         u32 mfiStatus = 0;
766         /*
767          * Check if it is our interrupt
768          */
769         status = readl(&regs->outbound_intr_status);
770 
771         if (status & MFI_INTR_FLAG_REPLY_MESSAGE) {
772                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
773         }
774         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
775                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
776         }
777 
778         /*
779          * Clear the interrupt by writing back the same value
780          */
781         if (mfiStatus)
782                 writel(status, &regs->outbound_doorbell_clear);
783 
784         /* Dummy readl to force pci flush */
785         readl(&regs->outbound_intr_status);
786 
787         return mfiStatus;
788 }
789 /**
790  * megasas_fire_cmd_gen2 -     Sends command to the FW
791  * @frame_phys_addr :          Physical address of cmd
792  * @frame_count :              Number of frames for the command
793  * @regs :                     MFI register set
794  */
795 static inline void
796 megasas_fire_cmd_gen2(struct megasas_instance *instance,
797                         dma_addr_t frame_phys_addr,
798                         u32 frame_count,
799                         struct megasas_register_set __iomem *regs)
800 {
801         unsigned long flags;
802         spin_lock_irqsave(&instance->hba_lock, flags);
803         writel((frame_phys_addr | (frame_count<<1))|1,
804                         &(regs)->inbound_queue_port);
805         spin_unlock_irqrestore(&instance->hba_lock, flags);
806 }
807 
808 /**
809  * megasas_adp_reset_gen2 -     For controller reset
810  * @regs:                               MFI register set
811  */
812 static int
813 megasas_adp_reset_gen2(struct megasas_instance *instance,
814                         struct megasas_register_set __iomem *reg_set)
815 {
816         u32                     retry = 0 ;
817         u32                     HostDiag;
818         u32                     *seq_offset = &reg_set->seq_offset;
819         u32                     *hostdiag_offset = &reg_set->host_diag;
820 
821         if (instance->instancet == &megasas_instance_template_skinny) {
822                 seq_offset = &reg_set->fusion_seq_offset;
823                 hostdiag_offset = &reg_set->fusion_host_diag;
824         }
825 
826         writel(0, seq_offset);
827         writel(4, seq_offset);
828         writel(0xb, seq_offset);
829         writel(2, seq_offset);
830         writel(7, seq_offset);
831         writel(0xd, seq_offset);
832 
833         msleep(1000);
834 
835         HostDiag = (u32)readl(hostdiag_offset);
836 
837         while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
838                 msleep(100);
839                 HostDiag = (u32)readl(hostdiag_offset);
840                 printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
841                                         retry, HostDiag);
842 
843                 if (retry++ >= 100)
844                         return 1;
845 
846         }
847 
848         printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
849 
850         writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
851 
852         ssleep(10);
853 
854         HostDiag = (u32)readl(hostdiag_offset);
855         while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
856                 msleep(100);
857                 HostDiag = (u32)readl(hostdiag_offset);
858                 printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
859                                 retry, HostDiag);
860 
861                 if (retry++ >= 1000)
862                         return 1;
863 
864         }
865         return 0;
866 }
867 
868 /**
869  * megasas_check_reset_gen2 -   For controller reset check
870  * @regs:                               MFI register set
871  */
872 static int
873 megasas_check_reset_gen2(struct megasas_instance *instance,
874                 struct megasas_register_set __iomem *regs)
875 {
876         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
877                 return 1;
878         }
879 
880         return 0;
881 }
882 
883 static struct megasas_instance_template megasas_instance_template_gen2 = {
884 
885         .fire_cmd = megasas_fire_cmd_gen2,
886         .enable_intr = megasas_enable_intr_gen2,
887         .disable_intr = megasas_disable_intr_gen2,
888         .clear_intr = megasas_clear_intr_gen2,
889         .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
890         .adp_reset = megasas_adp_reset_gen2,
891         .check_reset = megasas_check_reset_gen2,
892         .service_isr = megasas_isr,
893         .tasklet = megasas_complete_cmd_dpc,
894         .init_adapter = megasas_init_adapter_mfi,
895         .build_and_issue_cmd = megasas_build_and_issue_cmd,
896         .issue_dcmd = megasas_issue_dcmd,
897 };
898 
899 /**
900 *       This is the end of set of functions & definitions
901 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
902 */
903 
904 /*
905  * Template added for TB (Fusion)
906  */
907 extern struct megasas_instance_template megasas_instance_template_fusion;
908 
909 /**
910  * megasas_issue_polled -       Issues a polling command
911  * @instance:                   Adapter soft state
912  * @cmd:                        Command packet to be issued
913  *
914  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
915  */
916 int
917 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
918 {
919         int seconds;
920 
921         struct megasas_header *frame_hdr = &cmd->frame->hdr;
922 
923         frame_hdr->cmd_status = MFI_CMD_STATUS_POLL_MODE;
924         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
925 
926         /*
927          * Issue the frame using inbound queue port
928          */
929         instance->instancet->issue_dcmd(instance, cmd);
930 
931         /*
932          * Wait for cmd_status to change
933          */
934         if (instance->requestorId)
935                 seconds = MEGASAS_ROUTINE_WAIT_TIME_VF;
936         else
937                 seconds = MFI_POLL_TIMEOUT_SECS;
938         return wait_and_poll(instance, cmd, seconds);
939 }
940 
941 /**
942  * megasas_issue_blocked_cmd -  Synchronous wrapper around regular FW cmds
943  * @instance:                   Adapter soft state
944  * @cmd:                        Command to be issued
945  * @timeout:                    Timeout in seconds
946  *
947  * This function waits on an event for the command to be returned from ISR.
948  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
949  * Used to issue ioctl commands.
950  */
951 int
952 megasas_issue_blocked_cmd(struct megasas_instance *instance,
953                           struct megasas_cmd *cmd, int timeout)
954 {
955         int ret = 0;
956         cmd->cmd_status = ENODATA;
957 
958         cmd->is_wait_event = 1;
959         instance->instancet->issue_dcmd(instance, cmd);
960         if (timeout) {
961                 ret = wait_event_timeout(instance->int_cmd_wait_q,
962                                 cmd->cmd_status != ENODATA, timeout * HZ);
963                 if (!ret)
964                         return 1;
965         } else
966                 wait_event(instance->int_cmd_wait_q,
967                                 cmd->cmd_status != ENODATA);
968 
969         return 0;
970 }
971 
972 /**
973  * megasas_issue_blocked_abort_cmd -    Aborts previously issued cmd
974  * @instance:                           Adapter soft state
975  * @cmd_to_abort:                       Previously issued cmd to be aborted
976  * @timeout:                            Timeout in seconds
977  *
978  * MFI firmware can abort previously issued AEN comamnd (automatic event
979  * notification). The megasas_issue_blocked_abort_cmd() issues such abort
980  * cmd and waits for return status.
981  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
982  */
983 static int
984 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
985                                 struct megasas_cmd *cmd_to_abort, int timeout)
986 {
987         struct megasas_cmd *cmd;
988         struct megasas_abort_frame *abort_fr;
989         int ret = 0;
990 
991         cmd = megasas_get_cmd(instance);
992 
993         if (!cmd)
994                 return -1;
995 
996         abort_fr = &cmd->frame->abort;
997 
998         /*
999          * Prepare and issue the abort frame
1000          */
1001         abort_fr->cmd = MFI_CMD_ABORT;
1002         abort_fr->cmd_status = 0xFF;
1003         abort_fr->flags = cpu_to_le16(0);
1004         abort_fr->abort_context = cpu_to_le32(cmd_to_abort->index);
1005         abort_fr->abort_mfi_phys_addr_lo =
1006                 cpu_to_le32(lower_32_bits(cmd_to_abort->frame_phys_addr));
1007         abort_fr->abort_mfi_phys_addr_hi =
1008                 cpu_to_le32(upper_32_bits(cmd_to_abort->frame_phys_addr));
1009 
1010         cmd->sync_cmd = 1;
1011         cmd->cmd_status = 0xFF;
1012 
1013         instance->instancet->issue_dcmd(instance, cmd);
1014 
1015         if (timeout) {
1016                 ret = wait_event_timeout(instance->abort_cmd_wait_q,
1017                                 cmd->cmd_status != ENODATA, timeout * HZ);
1018                 if (!ret) {
1019                         dev_err(&instance->pdev->dev, "Command timedout"
1020                                 "from %s\n", __func__);
1021                         return 1;
1022                 }
1023         } else
1024                 wait_event(instance->abort_cmd_wait_q,
1025                                 cmd->cmd_status != ENODATA);
1026 
1027         cmd->sync_cmd = 0;
1028 
1029         megasas_return_cmd(instance, cmd);
1030         return 0;
1031 }
1032 
1033 /**
1034  * megasas_make_sgl32 - Prepares 32-bit SGL
1035  * @instance:           Adapter soft state
1036  * @scp:                SCSI command from the mid-layer
1037  * @mfi_sgl:            SGL to be filled in
1038  *
1039  * If successful, this function returns the number of SG elements. Otherwise,
1040  * it returnes -1.
1041  */
1042 static int
1043 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
1044                    union megasas_sgl *mfi_sgl)
1045 {
1046         int i;
1047         int sge_count;
1048         struct scatterlist *os_sgl;
1049 
1050         sge_count = scsi_dma_map(scp);
1051         BUG_ON(sge_count < 0);
1052 
1053         if (sge_count) {
1054                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1055                         mfi_sgl->sge32[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1056                         mfi_sgl->sge32[i].phys_addr = cpu_to_le32(sg_dma_address(os_sgl));
1057                 }
1058         }
1059         return sge_count;
1060 }
1061 
1062 /**
1063  * megasas_make_sgl64 - Prepares 64-bit SGL
1064  * @instance:           Adapter soft state
1065  * @scp:                SCSI command from the mid-layer
1066  * @mfi_sgl:            SGL to be filled in
1067  *
1068  * If successful, this function returns the number of SG elements. Otherwise,
1069  * it returnes -1.
1070  */
1071 static int
1072 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
1073                    union megasas_sgl *mfi_sgl)
1074 {
1075         int i;
1076         int sge_count;
1077         struct scatterlist *os_sgl;
1078 
1079         sge_count = scsi_dma_map(scp);
1080         BUG_ON(sge_count < 0);
1081 
1082         if (sge_count) {
1083                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1084                         mfi_sgl->sge64[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1085                         mfi_sgl->sge64[i].phys_addr = cpu_to_le64(sg_dma_address(os_sgl));
1086                 }
1087         }
1088         return sge_count;
1089 }
1090 
1091 /**
1092  * megasas_make_sgl_skinny - Prepares IEEE SGL
1093  * @instance:           Adapter soft state
1094  * @scp:                SCSI command from the mid-layer
1095  * @mfi_sgl:            SGL to be filled in
1096  *
1097  * If successful, this function returns the number of SG elements. Otherwise,
1098  * it returnes -1.
1099  */
1100 static int
1101 megasas_make_sgl_skinny(struct megasas_instance *instance,
1102                 struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
1103 {
1104         int i;
1105         int sge_count;
1106         struct scatterlist *os_sgl;
1107 
1108         sge_count = scsi_dma_map(scp);
1109 
1110         if (sge_count) {
1111                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1112                         mfi_sgl->sge_skinny[i].length =
1113                                 cpu_to_le32(sg_dma_len(os_sgl));
1114                         mfi_sgl->sge_skinny[i].phys_addr =
1115                                 cpu_to_le64(sg_dma_address(os_sgl));
1116                         mfi_sgl->sge_skinny[i].flag = cpu_to_le32(0);
1117                 }
1118         }
1119         return sge_count;
1120 }
1121 
1122  /**
1123  * megasas_get_frame_count - Computes the number of frames
1124  * @frame_type          : type of frame- io or pthru frame
1125  * @sge_count           : number of sg elements
1126  *
1127  * Returns the number of frames required for numnber of sge's (sge_count)
1128  */
1129 
1130 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1131                         u8 sge_count, u8 frame_type)
1132 {
1133         int num_cnt;
1134         int sge_bytes;
1135         u32 sge_sz;
1136         u32 frame_count=0;
1137 
1138         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1139             sizeof(struct megasas_sge32);
1140 
1141         if (instance->flag_ieee) {
1142                 sge_sz = sizeof(struct megasas_sge_skinny);
1143         }
1144 
1145         /*
1146          * Main frame can contain 2 SGEs for 64-bit SGLs and
1147          * 3 SGEs for 32-bit SGLs for ldio &
1148          * 1 SGEs for 64-bit SGLs and
1149          * 2 SGEs for 32-bit SGLs for pthru frame
1150          */
1151         if (unlikely(frame_type == PTHRU_FRAME)) {
1152                 if (instance->flag_ieee == 1) {
1153                         num_cnt = sge_count - 1;
1154                 } else if (IS_DMA64)
1155                         num_cnt = sge_count - 1;
1156                 else
1157                         num_cnt = sge_count - 2;
1158         } else {
1159                 if (instance->flag_ieee == 1) {
1160                         num_cnt = sge_count - 1;
1161                 } else if (IS_DMA64)
1162                         num_cnt = sge_count - 2;
1163                 else
1164                         num_cnt = sge_count - 3;
1165         }
1166 
1167         if(num_cnt>0){
1168                 sge_bytes = sge_sz * num_cnt;
1169 
1170                 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1171                     ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1172         }
1173         /* Main frame */
1174         frame_count +=1;
1175 
1176         if (frame_count > 7)
1177                 frame_count = 8;
1178         return frame_count;
1179 }
1180 
1181 /**
1182  * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
1183  * @instance:           Adapter soft state
1184  * @scp:                SCSI command
1185  * @cmd:                Command to be prepared in
1186  *
1187  * This function prepares CDB commands. These are typcially pass-through
1188  * commands to the devices.
1189  */
1190 static int
1191 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1192                    struct megasas_cmd *cmd)
1193 {
1194         u32 is_logical;
1195         u32 device_id;
1196         u16 flags = 0;
1197         struct megasas_pthru_frame *pthru;
1198 
1199         is_logical = MEGASAS_IS_LOGICAL(scp);
1200         device_id = MEGASAS_DEV_INDEX(instance, scp);
1201         pthru = (struct megasas_pthru_frame *)cmd->frame;
1202 
1203         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1204                 flags = MFI_FRAME_DIR_WRITE;
1205         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1206                 flags = MFI_FRAME_DIR_READ;
1207         else if (scp->sc_data_direction == PCI_DMA_NONE)
1208                 flags = MFI_FRAME_DIR_NONE;
1209 
1210         if (instance->flag_ieee == 1) {
1211                 flags |= MFI_FRAME_IEEE;
1212         }
1213 
1214         /*
1215          * Prepare the DCDB frame
1216          */
1217         pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1218         pthru->cmd_status = 0x0;
1219         pthru->scsi_status = 0x0;
1220         pthru->target_id = device_id;
1221         pthru->lun = scp->device->lun;
1222         pthru->cdb_len = scp->cmd_len;
1223         pthru->timeout = 0;
1224         pthru->pad_0 = 0;
1225         pthru->flags = cpu_to_le16(flags);
1226         pthru->data_xfer_len = cpu_to_le32(scsi_bufflen(scp));
1227 
1228         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1229 
1230         /*
1231         * If the command is for the tape device, set the
1232         * pthru timeout to the os layer timeout value.
1233         */
1234         if (scp->device->type == TYPE_TAPE) {
1235                 if ((scp->request->timeout / HZ) > 0xFFFF)
1236                         pthru->timeout = 0xFFFF;
1237                 else
1238                         pthru->timeout = cpu_to_le16(scp->request->timeout / HZ);
1239         }
1240 
1241         /*
1242          * Construct SGL
1243          */
1244         if (instance->flag_ieee == 1) {
1245                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1246                 pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1247                                                       &pthru->sgl);
1248         } else if (IS_DMA64) {
1249                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1250                 pthru->sge_count = megasas_make_sgl64(instance, scp,
1251                                                       &pthru->sgl);
1252         } else
1253                 pthru->sge_count = megasas_make_sgl32(instance, scp,
1254                                                       &pthru->sgl);
1255 
1256         if (pthru->sge_count > instance->max_num_sge) {
1257                 printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1258                         pthru->sge_count);
1259                 return 0;
1260         }
1261 
1262         /*
1263          * Sense info specific
1264          */
1265         pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1266         pthru->sense_buf_phys_addr_hi =
1267                 cpu_to_le32(upper_32_bits(cmd->sense_phys_addr));
1268         pthru->sense_buf_phys_addr_lo =
1269                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
1270 
1271         /*
1272          * Compute the total number of frames this command consumes. FW uses
1273          * this number to pull sufficient number of frames from host memory.
1274          */
1275         cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1276                                                         PTHRU_FRAME);
1277 
1278         return cmd->frame_count;
1279 }
1280 
1281 /**
1282  * megasas_build_ldio - Prepares IOs to logical devices
1283  * @instance:           Adapter soft state
1284  * @scp:                SCSI command
1285  * @cmd:                Command to be prepared
1286  *
1287  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1288  */
1289 static int
1290 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1291                    struct megasas_cmd *cmd)
1292 {
1293         u32 device_id;
1294         u8 sc = scp->cmnd[0];
1295         u16 flags = 0;
1296         struct megasas_io_frame *ldio;
1297 
1298         device_id = MEGASAS_DEV_INDEX(instance, scp);
1299         ldio = (struct megasas_io_frame *)cmd->frame;
1300 
1301         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1302                 flags = MFI_FRAME_DIR_WRITE;
1303         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1304                 flags = MFI_FRAME_DIR_READ;
1305 
1306         if (instance->flag_ieee == 1) {
1307                 flags |= MFI_FRAME_IEEE;
1308         }
1309 
1310         /*
1311          * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1312          */
1313         ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1314         ldio->cmd_status = 0x0;
1315         ldio->scsi_status = 0x0;
1316         ldio->target_id = device_id;
1317         ldio->timeout = 0;
1318         ldio->reserved_0 = 0;
1319         ldio->pad_0 = 0;
1320         ldio->flags = cpu_to_le16(flags);
1321         ldio->start_lba_hi = 0;
1322         ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1323 
1324         /*
1325          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1326          */
1327         if (scp->cmd_len == 6) {
1328                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[4]);
1329                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[1] << 16) |
1330                                                  ((u32) scp->cmnd[2] << 8) |
1331                                                  (u32) scp->cmnd[3]);
1332 
1333                 ldio->start_lba_lo &= cpu_to_le32(0x1FFFFF);
1334         }
1335 
1336         /*
1337          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1338          */
1339         else if (scp->cmd_len == 10) {
1340                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[8] |
1341                                               ((u32) scp->cmnd[7] << 8));
1342                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1343                                                  ((u32) scp->cmnd[3] << 16) |
1344                                                  ((u32) scp->cmnd[4] << 8) |
1345                                                  (u32) scp->cmnd[5]);
1346         }
1347 
1348         /*
1349          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1350          */
1351         else if (scp->cmd_len == 12) {
1352                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1353                                               ((u32) scp->cmnd[7] << 16) |
1354                                               ((u32) scp->cmnd[8] << 8) |
1355                                               (u32) scp->cmnd[9]);
1356 
1357                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1358                                                  ((u32) scp->cmnd[3] << 16) |
1359                                                  ((u32) scp->cmnd[4] << 8) |
1360                                                  (u32) scp->cmnd[5]);
1361         }
1362 
1363         /*
1364          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1365          */
1366         else if (scp->cmd_len == 16) {
1367                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[10] << 24) |
1368                                               ((u32) scp->cmnd[11] << 16) |
1369                                               ((u32) scp->cmnd[12] << 8) |
1370                                               (u32) scp->cmnd[13]);
1371 
1372                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1373                                                  ((u32) scp->cmnd[7] << 16) |
1374                                                  ((u32) scp->cmnd[8] << 8) |
1375                                                  (u32) scp->cmnd[9]);
1376 
1377                 ldio->start_lba_hi = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1378                                                  ((u32) scp->cmnd[3] << 16) |
1379                                                  ((u32) scp->cmnd[4] << 8) |
1380                                                  (u32) scp->cmnd[5]);
1381 
1382         }
1383 
1384         /*
1385          * Construct SGL
1386          */
1387         if (instance->flag_ieee) {
1388                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1389                 ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1390                                               &ldio->sgl);
1391         } else if (IS_DMA64) {
1392                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1393                 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1394         } else
1395                 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1396 
1397         if (ldio->sge_count > instance->max_num_sge) {
1398                 printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1399                         ldio->sge_count);
1400                 return 0;
1401         }
1402 
1403         /*
1404          * Sense info specific
1405          */
1406         ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1407         ldio->sense_buf_phys_addr_hi = 0;
1408         ldio->sense_buf_phys_addr_lo = cpu_to_le32(cmd->sense_phys_addr);
1409 
1410         /*
1411          * Compute the total number of frames this command consumes. FW uses
1412          * this number to pull sufficient number of frames from host memory.
1413          */
1414         cmd->frame_count = megasas_get_frame_count(instance,
1415                         ldio->sge_count, IO_FRAME);
1416 
1417         return cmd->frame_count;
1418 }
1419 
1420 /**
1421  * megasas_is_ldio -            Checks if the cmd is for logical drive
1422  * @scmd:                       SCSI command
1423  *
1424  * Called by megasas_queue_command to find out if the command to be queued
1425  * is a logical drive command
1426  */
1427 inline int megasas_is_ldio(struct scsi_cmnd *cmd)
1428 {
1429         if (!MEGASAS_IS_LOGICAL(cmd))
1430                 return 0;
1431         switch (cmd->cmnd[0]) {
1432         case READ_10:
1433         case WRITE_10:
1434         case READ_12:
1435         case WRITE_12:
1436         case READ_6:
1437         case WRITE_6:
1438         case READ_16:
1439         case WRITE_16:
1440                 return 1;
1441         default:
1442                 return 0;
1443         }
1444 }
1445 
1446  /**
1447  * megasas_dump_pending_frames -        Dumps the frame address of all pending cmds
1448  *                                      in FW
1449  * @instance:                           Adapter soft state
1450  */
1451 static inline void
1452 megasas_dump_pending_frames(struct megasas_instance *instance)
1453 {
1454         struct megasas_cmd *cmd;
1455         int i,n;
1456         union megasas_sgl *mfi_sgl;
1457         struct megasas_io_frame *ldio;
1458         struct megasas_pthru_frame *pthru;
1459         u32 sgcount;
1460         u32 max_cmd = instance->max_fw_cmds;
1461 
1462         printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1463         printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1464         if (IS_DMA64)
1465                 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1466         else
1467                 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1468 
1469         printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1470         for (i = 0; i < max_cmd; i++) {
1471                 cmd = instance->cmd_list[i];
1472                 if(!cmd->scmd)
1473                         continue;
1474                 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1475                 if (megasas_is_ldio(cmd->scmd)){
1476                         ldio = (struct megasas_io_frame *)cmd->frame;
1477                         mfi_sgl = &ldio->sgl;
1478                         sgcount = ldio->sge_count;
1479                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x,"
1480                         " lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1481                         instance->host->host_no, cmd->frame_count, ldio->cmd, ldio->target_id,
1482                         le32_to_cpu(ldio->start_lba_lo), le32_to_cpu(ldio->start_lba_hi),
1483                         le32_to_cpu(ldio->sense_buf_phys_addr_lo), sgcount);
1484                 }
1485                 else {
1486                         pthru = (struct megasas_pthru_frame *) cmd->frame;
1487                         mfi_sgl = &pthru->sgl;
1488                         sgcount = pthru->sge_count;
1489                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, "
1490                         "lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1491                         instance->host->host_no, cmd->frame_count, pthru->cmd, pthru->target_id,
1492                         pthru->lun, pthru->cdb_len, le32_to_cpu(pthru->data_xfer_len),
1493                         le32_to_cpu(pthru->sense_buf_phys_addr_lo), sgcount);
1494                 }
1495         if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1496                 for (n = 0; n < sgcount; n++){
1497                         if (IS_DMA64)
1498                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%llx ",
1499                                         le32_to_cpu(mfi_sgl->sge64[n].length),
1500                                         le64_to_cpu(mfi_sgl->sge64[n].phys_addr));
1501                         else
1502                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",
1503                                         le32_to_cpu(mfi_sgl->sge32[n].length),
1504                                         le32_to_cpu(mfi_sgl->sge32[n].phys_addr));
1505                         }
1506                 }
1507                 printk(KERN_ERR "\n");
1508         } /*for max_cmd*/
1509         printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1510         for (i = 0; i < max_cmd; i++) {
1511 
1512                 cmd = instance->cmd_list[i];
1513 
1514                 if(cmd->sync_cmd == 1){
1515                         printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1516                 }
1517         }
1518         printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1519 }
1520 
1521 u32
1522 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1523                             struct scsi_cmnd *scmd)
1524 {
1525         struct megasas_cmd *cmd;
1526         u32 frame_count;
1527 
1528         cmd = megasas_get_cmd(instance);
1529         if (!cmd)
1530                 return SCSI_MLQUEUE_HOST_BUSY;
1531 
1532         /*
1533          * Logical drive command
1534          */
1535         if (megasas_is_ldio(scmd))
1536                 frame_count = megasas_build_ldio(instance, scmd, cmd);
1537         else
1538                 frame_count = megasas_build_dcdb(instance, scmd, cmd);
1539 
1540         if (!frame_count)
1541                 goto out_return_cmd;
1542 
1543         cmd->scmd = scmd;
1544         scmd->SCp.ptr = (char *)cmd;
1545 
1546         /*
1547          * Issue the command to the FW
1548          */
1549         atomic_inc(&instance->fw_outstanding);
1550 
1551         instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1552                                 cmd->frame_count-1, instance->reg_set);
1553 
1554         return 0;
1555 out_return_cmd:
1556         megasas_return_cmd(instance, cmd);
1557         return 1;
1558 }
1559 
1560 
1561 /**
1562  * megasas_queue_command -      Queue entry point
1563  * @scmd:                       SCSI command to be queued
1564  * @done:                       Callback entry point
1565  */
1566 static int
1567 megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
1568 {
1569         struct megasas_instance *instance;
1570         unsigned long flags;
1571 
1572         instance = (struct megasas_instance *)
1573             scmd->device->host->hostdata;
1574 
1575         if (instance->issuepend_done == 0)
1576                 return SCSI_MLQUEUE_HOST_BUSY;
1577 
1578         spin_lock_irqsave(&instance->hba_lock, flags);
1579 
1580         /* Check for an mpio path and adjust behavior */
1581         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
1582                 if (megasas_check_mpio_paths(instance, scmd) ==
1583                     (DID_RESET << 16)) {
1584                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1585                         return SCSI_MLQUEUE_HOST_BUSY;
1586                 } else {
1587                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1588                         scmd->result = DID_NO_CONNECT << 16;
1589                         scmd->scsi_done(scmd);
1590                         return 0;
1591                 }
1592         }
1593 
1594         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
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         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1602                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1603                 return SCSI_MLQUEUE_HOST_BUSY;
1604         }
1605 
1606         spin_unlock_irqrestore(&instance->hba_lock, flags);
1607 
1608         scmd->result = 0;
1609 
1610         if (MEGASAS_IS_LOGICAL(scmd) &&
1611             (scmd->device->id >= instance->fw_supported_vd_count ||
1612                 scmd->device->lun)) {
1613                 scmd->result = DID_BAD_TARGET << 16;
1614                 goto out_done;
1615         }
1616 
1617         switch (scmd->cmnd[0]) {
1618         case SYNCHRONIZE_CACHE:
1619                 /*
1620                  * FW takes care of flush cache on its own
1621                  * No need to send it down
1622                  */
1623                 scmd->result = DID_OK << 16;
1624                 goto out_done;
1625         default:
1626                 break;
1627         }
1628 
1629         if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1630                 printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1631                 return SCSI_MLQUEUE_HOST_BUSY;
1632         }
1633 
1634         return 0;
1635 
1636  out_done:
1637         scmd->scsi_done(scmd);
1638         return 0;
1639 }
1640 
1641 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1642 {
1643         int i;
1644 
1645         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1646 
1647                 if ((megasas_mgmt_info.instance[i]) &&
1648                     (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1649                         return megasas_mgmt_info.instance[i];
1650         }
1651 
1652         return NULL;
1653 }
1654 
1655 static int megasas_slave_configure(struct scsi_device *sdev)
1656 {
1657         /*
1658         * The RAID firmware may require extended timeouts.
1659         */
1660         blk_queue_rq_timeout(sdev->request_queue,
1661                 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1662 
1663         return 0;
1664 }
1665 
1666 static int megasas_slave_alloc(struct scsi_device *sdev)
1667 {
1668         u16             pd_index = 0;
1669         struct megasas_instance *instance ;
1670         instance = megasas_lookup_instance(sdev->host->host_no);
1671         if (sdev->channel < MEGASAS_MAX_PD_CHANNELS) {
1672                 /*
1673                  * Open the OS scan to the SYSTEM PD
1674                  */
1675                 pd_index =
1676                         (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1677                         sdev->id;
1678                 if (instance->pd_list[pd_index].driveState ==
1679                                         MR_PD_STATE_SYSTEM) {
1680                         return 0;
1681                 }
1682                 return -ENXIO;
1683         }
1684         return 0;
1685 }
1686 
1687 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1688 {
1689         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1690             (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1691             (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
1692             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
1693             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1694             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1695                 writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
1696                 /* Flush */
1697                 readl(&instance->reg_set->doorbell);
1698                 if (instance->mpio && instance->requestorId)
1699                         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
1700         } else {
1701                 writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
1702         }
1703 }
1704 
1705  /**
1706   * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1707   *                                     restored to max value
1708   * @instance:                  Adapter soft state
1709   *
1710   */
1711 void
1712 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1713 {
1714         unsigned long flags;
1715         if (instance->flag & MEGASAS_FW_BUSY
1716             && time_after(jiffies, instance->last_time + 5 * HZ)
1717             && atomic_read(&instance->fw_outstanding) <
1718             instance->throttlequeuedepth + 1) {
1719 
1720                 spin_lock_irqsave(instance->host->host_lock, flags);
1721                 instance->flag &= ~MEGASAS_FW_BUSY;
1722                 if (instance->is_imr) {
1723                         instance->host->can_queue =
1724                                 instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
1725                 } else
1726                         instance->host->can_queue =
1727                                 instance->max_fw_cmds - MEGASAS_INT_CMDS;
1728 
1729                 spin_unlock_irqrestore(instance->host->host_lock, flags);
1730         }
1731 }
1732 
1733 /**
1734  * megasas_complete_cmd_dpc      -      Returns FW's controller structure
1735  * @instance_addr:                      Address of adapter soft state
1736  *
1737  * Tasklet to complete cmds
1738  */
1739 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1740 {
1741         u32 producer;
1742         u32 consumer;
1743         u32 context;
1744         struct megasas_cmd *cmd;
1745         struct megasas_instance *instance =
1746                                 (struct megasas_instance *)instance_addr;
1747         unsigned long flags;
1748 
1749         /* If we have already declared adapter dead, donot complete cmds */
1750         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1751                 return;
1752 
1753         spin_lock_irqsave(&instance->completion_lock, flags);
1754 
1755         producer = le32_to_cpu(*instance->producer);
1756         consumer = le32_to_cpu(*instance->consumer);
1757 
1758         while (consumer != producer) {
1759                 context = le32_to_cpu(instance->reply_queue[consumer]);
1760                 if (context >= instance->max_fw_cmds) {
1761                         printk(KERN_ERR "Unexpected context value %x\n",
1762                                 context);
1763                         BUG();
1764                 }
1765 
1766                 cmd = instance->cmd_list[context];
1767 
1768                 megasas_complete_cmd(instance, cmd, DID_OK);
1769 
1770                 consumer++;
1771                 if (consumer == (instance->max_fw_cmds + 1)) {
1772                         consumer = 0;
1773                 }
1774         }
1775 
1776         *instance->consumer = cpu_to_le32(producer);
1777 
1778         spin_unlock_irqrestore(&instance->completion_lock, flags);
1779 
1780         /*
1781          * Check if we can restore can_queue
1782          */
1783         megasas_check_and_restore_queue_depth(instance);
1784 }
1785 
1786 /**
1787  * megasas_start_timer - Initializes a timer object
1788  * @instance:           Adapter soft state
1789  * @timer:              timer object to be initialized
1790  * @fn:                 timer function
1791  * @interval:           time interval between timer function call
1792  *
1793  */
1794 void megasas_start_timer(struct megasas_instance *instance,
1795                         struct timer_list *timer,
1796                         void *fn, unsigned long interval)
1797 {
1798         init_timer(timer);
1799         timer->expires = jiffies + interval;
1800         timer->data = (unsigned long)instance;
1801         timer->function = fn;
1802         add_timer(timer);
1803 }
1804 
1805 static void
1806 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1807 
1808 static void
1809 process_fw_state_change_wq(struct work_struct *work);
1810 
1811 void megasas_do_ocr(struct megasas_instance *instance)
1812 {
1813         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1814         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1815         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1816                 *instance->consumer = cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
1817         }
1818         instance->instancet->disable_intr(instance);
1819         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
1820         instance->issuepend_done = 0;
1821 
1822         atomic_set(&instance->fw_outstanding, 0);
1823         megasas_internal_reset_defer_cmds(instance);
1824         process_fw_state_change_wq(&instance->work_init);
1825 }
1826 
1827 static int megasas_get_ld_vf_affiliation_111(struct megasas_instance *instance,
1828                                             int initial)
1829 {
1830         struct megasas_cmd *cmd;
1831         struct megasas_dcmd_frame *dcmd;
1832         struct MR_LD_VF_AFFILIATION_111 *new_affiliation_111 = NULL;
1833         dma_addr_t new_affiliation_111_h;
1834         int ld, retval = 0;
1835         u8 thisVf;
1836 
1837         cmd = megasas_get_cmd(instance);
1838 
1839         if (!cmd) {
1840                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation_111:"
1841                        "Failed to get cmd for scsi%d.\n",
1842                         instance->host->host_no);
1843                 return -ENOMEM;
1844         }
1845 
1846         dcmd = &cmd->frame->dcmd;
1847 
1848         if (!instance->vf_affiliation_111) {
1849                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1850                        "affiliation for scsi%d.\n", instance->host->host_no);
1851                 megasas_return_cmd(instance, cmd);
1852                 return -ENOMEM;
1853         }
1854 
1855         if (initial)
1856                         memset(instance->vf_affiliation_111, 0,
1857                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1858         else {
1859                 new_affiliation_111 =
1860                         pci_alloc_consistent(instance->pdev,
1861                                              sizeof(struct MR_LD_VF_AFFILIATION_111),
1862                                              &new_affiliation_111_h);
1863                 if (!new_affiliation_111) {
1864                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1865                                "memory for new affiliation for scsi%d.\n",
1866                                instance->host->host_no);
1867                         megasas_return_cmd(instance, cmd);
1868                         return -ENOMEM;
1869                 }
1870                 memset(new_affiliation_111, 0,
1871                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1872         }
1873 
1874         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1875 
1876         dcmd->cmd = MFI_CMD_DCMD;
1877         dcmd->cmd_status = 0xFF;
1878         dcmd->sge_count = 1;
1879         dcmd->flags = MFI_FRAME_DIR_BOTH;
1880         dcmd->timeout = 0;
1881         dcmd->pad_0 = 0;
1882         dcmd->data_xfer_len = sizeof(struct MR_LD_VF_AFFILIATION_111);
1883         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS_111;
1884 
1885         if (initial)
1886                 dcmd->sgl.sge32[0].phys_addr =
1887                         instance->vf_affiliation_111_h;
1888         else
1889                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_111_h;
1890 
1891         dcmd->sgl.sge32[0].length =
1892                 sizeof(struct MR_LD_VF_AFFILIATION_111);
1893 
1894         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
1895                "scsi%d\n", instance->host->host_no);
1896 
1897         megasas_issue_blocked_cmd(instance, cmd, 0);
1898 
1899         if (dcmd->cmd_status) {
1900                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
1901                        " failed with status 0x%x for scsi%d.\n",
1902                        dcmd->cmd_status, instance->host->host_no);
1903                 retval = 1; /* Do a scan if we couldn't get affiliation */
1904                 goto out;
1905         }
1906 
1907         if (!initial) {
1908                 thisVf = new_affiliation_111->thisVf;
1909                 for (ld = 0 ; ld < new_affiliation_111->vdCount; ld++)
1910                         if (instance->vf_affiliation_111->map[ld].policy[thisVf] !=
1911                             new_affiliation_111->map[ld].policy[thisVf]) {
1912                                 printk(KERN_WARNING "megasas: SR-IOV: "
1913                                        "Got new LD/VF affiliation "
1914                                        "for scsi%d.\n",
1915                                        instance->host->host_no);
1916                                 memcpy(instance->vf_affiliation_111,
1917                                        new_affiliation_111,
1918                                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1919                                 retval = 1;
1920                                 goto out;
1921                         }
1922         }
1923 out:
1924         if (new_affiliation_111) {
1925                 pci_free_consistent(instance->pdev,
1926                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
1927                                     new_affiliation_111,
1928                                     new_affiliation_111_h);
1929         }
1930 
1931         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
1932                 megasas_return_mfi_mpt_pthr(instance, cmd,
1933                         cmd->mpt_pthr_cmd_blocked);
1934         else
1935                 megasas_return_cmd(instance, cmd);
1936 
1937         return retval;
1938 }
1939 
1940 static int megasas_get_ld_vf_affiliation_12(struct megasas_instance *instance,
1941                                             int initial)
1942 {
1943         struct megasas_cmd *cmd;
1944         struct megasas_dcmd_frame *dcmd;
1945         struct MR_LD_VF_AFFILIATION *new_affiliation = NULL;
1946         struct MR_LD_VF_MAP *newmap = NULL, *savedmap = NULL;
1947         dma_addr_t new_affiliation_h;
1948         int i, j, retval = 0, found = 0, doscan = 0;
1949         u8 thisVf;
1950 
1951         cmd = megasas_get_cmd(instance);
1952 
1953         if (!cmd) {
1954                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation12: "
1955                        "Failed to get cmd for scsi%d.\n",
1956                        instance->host->host_no);
1957                 return -ENOMEM;
1958         }
1959 
1960         dcmd = &cmd->frame->dcmd;
1961 
1962         if (!instance->vf_affiliation) {
1963                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1964                        "affiliation for scsi%d.\n", instance->host->host_no);
1965                 megasas_return_cmd(instance, cmd);
1966                 return -ENOMEM;
1967         }
1968 
1969         if (initial)
1970                 memset(instance->vf_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
1971                        sizeof(struct MR_LD_VF_AFFILIATION));
1972         else {
1973                 new_affiliation =
1974                         pci_alloc_consistent(instance->pdev,
1975                                              (MAX_LOGICAL_DRIVES + 1) *
1976                                              sizeof(struct MR_LD_VF_AFFILIATION),
1977                                              &new_affiliation_h);
1978                 if (!new_affiliation) {
1979                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1980                                "memory for new affiliation for scsi%d.\n",
1981                                instance->host->host_no);
1982                         megasas_return_cmd(instance, cmd);
1983                         return -ENOMEM;
1984                 }
1985                 memset(new_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
1986                        sizeof(struct MR_LD_VF_AFFILIATION));
1987         }
1988 
1989         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1990 
1991         dcmd->cmd = MFI_CMD_DCMD;
1992         dcmd->cmd_status = 0xFF;
1993         dcmd->sge_count = 1;
1994         dcmd->flags = MFI_FRAME_DIR_BOTH;
1995         dcmd->timeout = 0;
1996         dcmd->pad_0 = 0;
1997         dcmd->data_xfer_len = (MAX_LOGICAL_DRIVES + 1) *
1998                 sizeof(struct MR_LD_VF_AFFILIATION);
1999         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS;
2000 
2001         if (initial)
2002                 dcmd->sgl.sge32[0].phys_addr = instance->vf_affiliation_h;
2003         else
2004                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_h;
2005 
2006         dcmd->sgl.sge32[0].length = (MAX_LOGICAL_DRIVES + 1) *
2007                 sizeof(struct MR_LD_VF_AFFILIATION);
2008 
2009         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
2010                "scsi%d\n", instance->host->host_no);
2011 
2012         megasas_issue_blocked_cmd(instance, cmd, 0);
2013 
2014         if (dcmd->cmd_status) {
2015                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
2016                        " failed with status 0x%x for scsi%d.\n",
2017                        dcmd->cmd_status, instance->host->host_no);
2018                 retval = 1; /* Do a scan if we couldn't get affiliation */
2019                 goto out;
2020         }
2021 
2022         if (!initial) {
2023                 if (!new_affiliation->ldCount) {
2024                         printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2025                                "affiliation for passive path for scsi%d.\n",
2026                                instance->host->host_no);
2027                         retval = 1;
2028                         goto out;
2029                 }
2030                 newmap = new_affiliation->map;
2031                 savedmap = instance->vf_affiliation->map;
2032                 thisVf = new_affiliation->thisVf;
2033                 for (i = 0 ; i < new_affiliation->ldCount; i++) {
2034                         found = 0;
2035                         for (j = 0; j < instance->vf_affiliation->ldCount;
2036                              j++) {
2037                                 if (newmap->ref.targetId ==
2038                                     savedmap->ref.targetId) {
2039                                         found = 1;
2040                                         if (newmap->policy[thisVf] !=
2041                                             savedmap->policy[thisVf]) {
2042                                                 doscan = 1;
2043                                                 goto out;
2044                                         }
2045                                 }
2046                                 savedmap = (struct MR_LD_VF_MAP *)
2047                                         ((unsigned char *)savedmap +
2048                                          savedmap->size);
2049                         }
2050                         if (!found && newmap->policy[thisVf] !=
2051                             MR_LD_ACCESS_HIDDEN) {
2052                                 doscan = 1;
2053                                 goto out;
2054                         }
2055                         newmap = (struct MR_LD_VF_MAP *)
2056                                 ((unsigned char *)newmap + newmap->size);
2057                 }
2058 
2059                 newmap = new_affiliation->map;
2060                 savedmap = instance->vf_affiliation->map;
2061 
2062                 for (i = 0 ; i < instance->vf_affiliation->ldCount; i++) {
2063                         found = 0;
2064                         for (j = 0 ; j < new_affiliation->ldCount; j++) {
2065                                 if (savedmap->ref.targetId ==
2066                                     newmap->ref.targetId) {
2067                                         found = 1;
2068                                         if (savedmap->policy[thisVf] !=
2069                                             newmap->policy[thisVf]) {
2070                                                 doscan = 1;
2071                                                 goto out;
2072                                         }
2073                                 }
2074                                 newmap = (struct MR_LD_VF_MAP *)
2075                                         ((unsigned char *)newmap +
2076                                          newmap->size);
2077                         }
2078                         if (!found && savedmap->policy[thisVf] !=
2079                             MR_LD_ACCESS_HIDDEN) {
2080                                 doscan = 1;
2081                                 goto out;
2082                         }
2083                         savedmap = (struct MR_LD_VF_MAP *)
2084                                 ((unsigned char *)savedmap +
2085                                  savedmap->size);
2086                 }
2087         }
2088 out:
2089         if (doscan) {
2090                 printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2091                        "affiliation for scsi%d.\n", instance->host->host_no);
2092                 memcpy(instance->vf_affiliation, new_affiliation,
2093                        new_affiliation->size);
2094                 retval = 1;
2095         }
2096 
2097         if (new_affiliation)
2098                 pci_free_consistent(instance->pdev,
2099                                     (MAX_LOGICAL_DRIVES + 1) *
2100                                     sizeof(struct MR_LD_VF_AFFILIATION),
2101                                     new_affiliation, new_affiliation_h);
2102         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2103                 megasas_return_mfi_mpt_pthr(instance, cmd,
2104                         cmd->mpt_pthr_cmd_blocked);
2105         else
2106                 megasas_return_cmd(instance, cmd);
2107 
2108         return retval;
2109 }
2110 
2111 /* This function will get the current SR-IOV LD/VF affiliation */
2112 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
2113         int initial)
2114 {
2115         int retval;
2116 
2117         if (instance->PlasmaFW111)
2118                 retval = megasas_get_ld_vf_affiliation_111(instance, initial);
2119         else
2120                 retval = megasas_get_ld_vf_affiliation_12(instance, initial);
2121         return retval;
2122 }
2123 
2124 /* This function will tell FW to start the SR-IOV heartbeat */
2125 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
2126                                          int initial)
2127 {
2128         struct megasas_cmd *cmd;
2129         struct megasas_dcmd_frame *dcmd;
2130         int retval = 0;
2131 
2132         cmd = megasas_get_cmd(instance);
2133 
2134         if (!cmd) {
2135                 printk(KERN_DEBUG "megasas: megasas_sriov_start_heartbeat: "
2136                        "Failed to get cmd for scsi%d.\n",
2137                        instance->host->host_no);
2138                 return -ENOMEM;
2139         }
2140 
2141         dcmd = &cmd->frame->dcmd;
2142 
2143         if (initial) {
2144                 instance->hb_host_mem =
2145                         pci_zalloc_consistent(instance->pdev,
2146                                               sizeof(struct MR_CTRL_HB_HOST_MEM),
2147                                               &instance->hb_host_mem_h);
2148                 if (!instance->hb_host_mem) {
2149                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate"
2150                                " memory for heartbeat host memory for "
2151                                "scsi%d.\n", instance->host->host_no);
2152                         retval = -ENOMEM;
2153                         goto out;
2154                 }
2155         }
2156 
2157         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2158 
2159         dcmd->mbox.s[0] = sizeof(struct MR_CTRL_HB_HOST_MEM);
2160         dcmd->cmd = MFI_CMD_DCMD;
2161         dcmd->cmd_status = 0xFF;
2162         dcmd->sge_count = 1;
2163         dcmd->flags = MFI_FRAME_DIR_BOTH;
2164         dcmd->timeout = 0;
2165         dcmd->pad_0 = 0;
2166         dcmd->data_xfer_len = sizeof(struct MR_CTRL_HB_HOST_MEM);
2167         dcmd->opcode = MR_DCMD_CTRL_SHARED_HOST_MEM_ALLOC;
2168         dcmd->sgl.sge32[0].phys_addr = instance->hb_host_mem_h;
2169         dcmd->sgl.sge32[0].length = sizeof(struct MR_CTRL_HB_HOST_MEM);
2170 
2171         printk(KERN_WARNING "megasas: SR-IOV: Starting heartbeat for scsi%d\n",
2172                instance->host->host_no);
2173 
2174         if (!megasas_issue_polled(instance, cmd)) {
2175                 retval = 0;
2176         } else {
2177                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2178                        "_MEM_ALLOC DCMD timed out for scsi%d\n",
2179                        instance->host->host_no);
2180                 retval = 1;
2181                 goto out;
2182         }
2183 
2184 
2185         if (dcmd->cmd_status) {
2186                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2187                        "_MEM_ALLOC DCMD failed with status 0x%x for scsi%d\n",
2188                        dcmd->cmd_status,
2189                        instance->host->host_no);
2190                 retval = 1;
2191                 goto out;
2192         }
2193 
2194 out:
2195         megasas_return_cmd(instance, cmd);
2196 
2197         return retval;
2198 }
2199 
2200 /* Handler for SR-IOV heartbeat */
2201 void megasas_sriov_heartbeat_handler(unsigned long instance_addr)
2202 {
2203         struct megasas_instance *instance =
2204                 (struct megasas_instance *)instance_addr;
2205 
2206         if (instance->hb_host_mem->HB.fwCounter !=
2207             instance->hb_host_mem->HB.driverCounter) {
2208                 instance->hb_host_mem->HB.driverCounter =
2209                         instance->hb_host_mem->HB.fwCounter;
2210                 mod_timer(&instance->sriov_heartbeat_timer,
2211                           jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2212         } else {
2213                 printk(KERN_WARNING "megasas: SR-IOV: Heartbeat never "
2214                        "completed for scsi%d\n", instance->host->host_no);
2215                 schedule_work(&instance->work_init);
2216         }
2217 }
2218 
2219 /**
2220  * megasas_wait_for_outstanding -       Wait for all outstanding cmds
2221  * @instance:                           Adapter soft state
2222  *
2223  * This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
2224  * complete all its outstanding commands. Returns error if one or more IOs
2225  * are pending after this time period. It also marks the controller dead.
2226  */
2227 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
2228 {
2229         int i;
2230         u32 reset_index;
2231         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
2232         u8 adprecovery;
2233         unsigned long flags;
2234         struct list_head clist_local;
2235         struct megasas_cmd *reset_cmd;
2236         u32 fw_state;
2237         u8 kill_adapter_flag;
2238 
2239         spin_lock_irqsave(&instance->hba_lock, flags);
2240         adprecovery = instance->adprecovery;
2241         spin_unlock_irqrestore(&instance->hba_lock, flags);
2242 
2243         if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2244 
2245                 INIT_LIST_HEAD(&clist_local);
2246                 spin_lock_irqsave(&instance->hba_lock, flags);
2247                 list_splice_init(&instance->internal_reset_pending_q,
2248                                 &clist_local);
2249                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2250 
2251                 printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
2252                 for (i = 0; i < wait_time; i++) {
2253                         msleep(1000);
2254                         spin_lock_irqsave(&instance->hba_lock, flags);
2255                         adprecovery = instance->adprecovery;
2256                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2257                         if (adprecovery == MEGASAS_HBA_OPERATIONAL)
2258                                 break;
2259                 }
2260 
2261                 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2262                         printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
2263                         spin_lock_irqsave(&instance->hba_lock, flags);
2264                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2265                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2266                         return FAILED;
2267                 }
2268 
2269                 reset_index     = 0;
2270                 while (!list_empty(&clist_local)) {
2271                         reset_cmd       = list_entry((&clist_local)->next,
2272                                                 struct megasas_cmd, list);
2273                         list_del_init(&reset_cmd->list);
2274                         if (reset_cmd->scmd) {
2275                                 reset_cmd->scmd->result = DID_RESET << 16;
2276                                 printk(KERN_NOTICE "%d:%p reset [%02x]\n",
2277                                         reset_index, reset_cmd,
2278                                         reset_cmd->scmd->cmnd[0]);
2279 
2280                                 reset_cmd->scmd->scsi_done(reset_cmd->scmd);
2281                                 megasas_return_cmd(instance, reset_cmd);
2282                         } else if (reset_cmd->sync_cmd) {
2283                                 printk(KERN_NOTICE "megasas:%p synch cmds"
2284                                                 "reset queue\n",
2285                                                 reset_cmd);
2286 
2287                                 reset_cmd->cmd_status = ENODATA;
2288                                 instance->instancet->fire_cmd(instance,
2289                                                 reset_cmd->frame_phys_addr,
2290                                                 0, instance->reg_set);
2291                         } else {
2292                                 printk(KERN_NOTICE "megasas: %p unexpected"
2293                                         "cmds lst\n",
2294                                         reset_cmd);
2295                         }
2296                         reset_index++;
2297                 }
2298 
2299                 return SUCCESS;
2300         }
2301 
2302         for (i = 0; i < resetwaittime; i++) {
2303 
2304                 int outstanding = atomic_read(&instance->fw_outstanding);
2305 
2306                 if (!outstanding)
2307                         break;
2308 
2309                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2310                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2311                                "commands to complete\n",i,outstanding);
2312                         /*
2313                          * Call cmd completion routine. Cmd to be
2314                          * be completed directly without depending on isr.
2315                          */
2316                         megasas_complete_cmd_dpc((unsigned long)instance);
2317                 }
2318 
2319                 msleep(1000);
2320         }
2321 
2322         i = 0;
2323         kill_adapter_flag = 0;
2324         do {
2325                 fw_state = instance->instancet->read_fw_status_reg(
2326                                         instance->reg_set) & MFI_STATE_MASK;
2327                 if ((fw_state == MFI_STATE_FAULT) &&
2328                         (instance->disableOnlineCtrlReset == 0)) {
2329                         if (i == 3) {
2330                                 kill_adapter_flag = 2;
2331                                 break;
2332                         }
2333                         megasas_do_ocr(instance);
2334                         kill_adapter_flag = 1;
2335 
2336                         /* wait for 1 secs to let FW finish the pending cmds */
2337                         msleep(1000);
2338                 }
2339                 i++;
2340         } while (i <= 3);
2341 
2342         if (atomic_read(&instance->fw_outstanding) &&
2343                                         !kill_adapter_flag) {
2344                 if (instance->disableOnlineCtrlReset == 0) {
2345 
2346                         megasas_do_ocr(instance);
2347 
2348                         /* wait for 5 secs to let FW finish the pending cmds */
2349                         for (i = 0; i < wait_time; i++) {
2350                                 int outstanding =
2351                                         atomic_read(&instance->fw_outstanding);
2352                                 if (!outstanding)
2353                                         return SUCCESS;
2354                                 msleep(1000);
2355                         }
2356                 }
2357         }
2358 
2359         if (atomic_read(&instance->fw_outstanding) ||
2360                                         (kill_adapter_flag == 2)) {
2361                 printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
2362                 /*
2363                 * Send signal to FW to stop processing any pending cmds.
2364                 * The controller will be taken offline by the OS now.
2365                 */
2366                 if ((instance->pdev->device ==
2367                         PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2368                         (instance->pdev->device ==
2369                         PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
2370                         writel(MFI_STOP_ADP,
2371                                 &instance->reg_set->doorbell);
2372                 } else {
2373                         writel(MFI_STOP_ADP,
2374                                 &instance->reg_set->inbound_doorbell);
2375                 }
2376                 megasas_dump_pending_frames(instance);
2377                 spin_lock_irqsave(&instance->hba_lock, flags);
2378                 instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2379                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2380                 return FAILED;
2381         }
2382 
2383         printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
2384 
2385         return SUCCESS;
2386 }
2387 
2388 /**
2389  * megasas_generic_reset -      Generic reset routine
2390  * @scmd:                       Mid-layer SCSI command
2391  *
2392  * This routine implements a generic reset handler for device, bus and host
2393  * reset requests. Device, bus and host specific reset handlers can use this
2394  * function after they do their specific tasks.
2395  */
2396 static int megasas_generic_reset(struct scsi_cmnd *scmd)
2397 {
2398         int ret_val;
2399         struct megasas_instance *instance;
2400 
2401         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2402 
2403         scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
2404                  scmd->cmnd[0], scmd->retries);
2405 
2406         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2407                 printk(KERN_ERR "megasas: cannot recover from previous reset "
2408                        "failures\n");
2409                 return FAILED;
2410         }
2411 
2412         ret_val = megasas_wait_for_outstanding(instance);
2413         if (ret_val == SUCCESS)
2414                 printk(KERN_NOTICE "megasas: reset successful \n");
2415         else
2416                 printk(KERN_ERR "megasas: failed to do reset\n");
2417 
2418         return ret_val;
2419 }
2420 
2421 /**
2422  * megasas_reset_timer - quiesce the adapter if required
2423  * @scmd:               scsi cmnd
2424  *
2425  * Sets the FW busy flag and reduces the host->can_queue if the
2426  * cmd has not been completed within the timeout period.
2427  */
2428 static enum
2429 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
2430 {
2431         struct megasas_instance *instance;
2432         unsigned long flags;
2433 
2434         if (time_after(jiffies, scmd->jiffies_at_alloc +
2435                                 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
2436                 return BLK_EH_NOT_HANDLED;
2437         }
2438 
2439         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2440         if (!(instance->flag & MEGASAS_FW_BUSY)) {
2441                 /* FW is busy, throttle IO */
2442                 spin_lock_irqsave(instance->host->host_lock, flags);
2443 
2444                 instance->host->can_queue = instance->throttlequeuedepth;
2445                 instance->last_time = jiffies;
2446                 instance->flag |= MEGASAS_FW_BUSY;
2447 
2448                 spin_unlock_irqrestore(instance->host->host_lock, flags);
2449         }
2450         return BLK_EH_RESET_TIMER;
2451 }
2452 
2453 /**
2454  * megasas_reset_device -       Device reset handler entry point
2455  */
2456 static int megasas_reset_device(struct scsi_cmnd *scmd)
2457 {
2458         int ret;
2459 
2460         /*
2461          * First wait for all commands to complete
2462          */
2463         ret = megasas_generic_reset(scmd);
2464 
2465         return ret;
2466 }
2467 
2468 /**
2469  * megasas_reset_bus_host -     Bus & host reset handler entry point
2470  */
2471 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
2472 {
2473         int ret;
2474         struct megasas_instance *instance;
2475         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2476 
2477         /*
2478          * First wait for all commands to complete
2479          */
2480         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
2481             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
2482             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2483             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
2484                 ret = megasas_reset_fusion(scmd->device->host, 1);
2485         else
2486                 ret = megasas_generic_reset(scmd);
2487 
2488         return ret;
2489 }
2490 
2491 /**
2492  * megasas_bios_param - Returns disk geometry for a disk
2493  * @sdev:               device handle
2494  * @bdev:               block device
2495  * @capacity:           drive capacity
2496  * @geom:               geometry parameters
2497  */
2498 static int
2499 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2500                  sector_t capacity, int geom[])
2501 {
2502         int heads;
2503         int sectors;
2504         sector_t cylinders;
2505         unsigned long tmp;
2506         /* Default heads (64) & sectors (32) */
2507         heads = 64;
2508         sectors = 32;
2509 
2510         tmp = heads * sectors;
2511         cylinders = capacity;
2512 
2513         sector_div(cylinders, tmp);
2514 
2515         /*
2516          * Handle extended translation size for logical drives > 1Gb
2517          */
2518 
2519         if (capacity >= 0x200000) {
2520                 heads = 255;
2521                 sectors = 63;
2522                 tmp = heads*sectors;
2523                 cylinders = capacity;
2524                 sector_div(cylinders, tmp);
2525         }
2526 
2527         geom[0] = heads;
2528         geom[1] = sectors;
2529         geom[2] = cylinders;
2530 
2531         return 0;
2532 }
2533 
2534 static void megasas_aen_polling(struct work_struct *work);
2535 
2536 /**
2537  * megasas_service_aen -        Processes an event notification
2538  * @instance:                   Adapter soft state
2539  * @cmd:                        AEN command completed by the ISR
2540  *
2541  * For AEN, driver sends a command down to FW that is held by the FW till an
2542  * event occurs. When an event of interest occurs, FW completes the command
2543  * that it was previously holding.
2544  *
2545  * This routines sends SIGIO signal to processes that have registered with the
2546  * driver for AEN.
2547  */
2548 static void
2549 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2550 {
2551         unsigned long flags;
2552         /*
2553          * Don't signal app if it is just an aborted previously registered aen
2554          */
2555         if ((!cmd->abort_aen) && (instance->unload == 0)) {
2556                 spin_lock_irqsave(&poll_aen_lock, flags);
2557                 megasas_poll_wait_aen = 1;
2558                 spin_unlock_irqrestore(&poll_aen_lock, flags);
2559                 wake_up(&megasas_poll_wait);
2560                 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2561         }
2562         else
2563                 cmd->abort_aen = 0;
2564 
2565         instance->aen_cmd = NULL;
2566 
2567         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2568                 megasas_return_mfi_mpt_pthr(instance, cmd,
2569                         cmd->mpt_pthr_cmd_blocked);
2570         else
2571                 megasas_return_cmd(instance, cmd);
2572 
2573         if ((instance->unload == 0) &&
2574                 ((instance->issuepend_done == 1))) {
2575                 struct megasas_aen_event *ev;
2576                 ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2577                 if (!ev) {
2578                         printk(KERN_ERR "megasas_service_aen: out of memory\n");
2579                 } else {
2580                         ev->instance = instance;
2581                         instance->ev = ev;
2582                         INIT_DELAYED_WORK(&ev->hotplug_work,
2583                                           megasas_aen_polling);
2584                         schedule_delayed_work(&ev->hotplug_work, 0);
2585                 }
2586         }
2587 }
2588 
2589 static int megasas_change_queue_depth(struct scsi_device *sdev,
2590                                       int queue_depth, int reason)
2591 {
2592         if (reason != SCSI_QDEPTH_DEFAULT)
2593                 return -EOPNOTSUPP;
2594 
2595         if (queue_depth > sdev->host->can_queue)
2596                 queue_depth = sdev->host->can_queue;
2597         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
2598                                 queue_depth);
2599 
2600         return queue_depth;
2601 }
2602 
2603 static ssize_t
2604 megasas_fw_crash_buffer_store(struct device *cdev,
2605         struct device_attribute *attr, const char *buf, size_t count)
2606 {
2607         struct Scsi_Host *shost = class_to_shost(cdev);
2608         struct megasas_instance *instance =
2609                 (struct megasas_instance *) shost->hostdata;
2610         int val = 0;
2611         unsigned long flags;
2612 
2613         if (kstrtoint(buf, 0, &val) != 0)
2614                 return -EINVAL;
2615 
2616         spin_lock_irqsave(&instance->crashdump_lock, flags);
2617         instance->fw_crash_buffer_offset = val;
2618         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2619         return strlen(buf);
2620 }
2621 
2622 static ssize_t
2623 megasas_fw_crash_buffer_show(struct device *cdev,
2624         struct device_attribute *attr, char *buf)
2625 {
2626         struct Scsi_Host *shost = class_to_shost(cdev);
2627         struct megasas_instance *instance =
2628                 (struct megasas_instance *) shost->hostdata;
2629         u32 size;
2630         unsigned long buff_addr;
2631         unsigned long dmachunk = CRASH_DMA_BUF_SIZE;
2632         unsigned long src_addr;
2633         unsigned long flags;
2634         u32 buff_offset;
2635 
2636         spin_lock_irqsave(&instance->crashdump_lock, flags);
2637         buff_offset = instance->fw_crash_buffer_offset;
2638         if (!instance->crash_dump_buf &&
2639                 !((instance->fw_crash_state == AVAILABLE) ||
2640                 (instance->fw_crash_state == COPYING))) {
2641                 dev_err(&instance->pdev->dev,
2642                         "Firmware crash dump is not available\n");
2643                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2644                 return -EINVAL;
2645         }
2646 
2647         buff_addr = (unsigned long) buf;
2648 
2649         if (buff_offset >
2650                 (instance->fw_crash_buffer_size * dmachunk)) {
2651                 dev_err(&instance->pdev->dev,
2652                         "Firmware crash dump offset is out of range\n");
2653                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2654                 return 0;
2655         }
2656 
2657         size = (instance->fw_crash_buffer_size * dmachunk) - buff_offset;
2658         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
2659 
2660         src_addr = (unsigned long)instance->crash_buf[buff_offset / dmachunk] +
2661                 (buff_offset % dmachunk);
2662         memcpy(buf, (void *)src_addr,  size);
2663         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2664 
2665         return size;
2666 }
2667 
2668 static ssize_t
2669 megasas_fw_crash_buffer_size_show(struct device *cdev,
2670         struct device_attribute *attr, char *buf)
2671 {
2672         struct Scsi_Host *shost = class_to_shost(cdev);
2673         struct megasas_instance *instance =
2674                 (struct megasas_instance *) shost->hostdata;
2675 
2676         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)
2677                 ((instance->fw_crash_buffer_size) * 1024 * 1024)/PAGE_SIZE);
2678 }
2679 
2680 static ssize_t
2681 megasas_fw_crash_state_store(struct device *cdev,
2682         struct device_attribute *attr, const char *buf, size_t count)
2683 {
2684         struct Scsi_Host *shost = class_to_shost(cdev);
2685         struct megasas_instance *instance =
2686                 (struct megasas_instance *) shost->hostdata;
2687         int val = 0;
2688         unsigned long flags;
2689 
2690         if (kstrtoint(buf, 0, &val) != 0)
2691                 return -EINVAL;
2692 
2693         if ((val <= AVAILABLE || val > COPY_ERROR)) {
2694                 dev_err(&instance->pdev->dev, "application updates invalid "
2695                         "firmware crash state\n");
2696                 return -EINVAL;
2697         }
2698 
2699         instance->fw_crash_state = val;
2700 
2701         if ((val == COPIED) || (val == COPY_ERROR)) {
2702                 spin_lock_irqsave(&instance->crashdump_lock, flags);
2703                 megasas_free_host_crash_buffer(instance);
2704                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2705                 if (val == COPY_ERROR)
2706                         dev_info(&instance->pdev->dev, "application failed to "
2707                                 "copy Firmware crash dump\n");
2708                 else
2709                         dev_info(&instance->pdev->dev, "Firmware crash dump "
2710                                 "copied successfully\n");
2711         }
2712         return strlen(buf);
2713 }
2714 
2715 static ssize_t
2716 megasas_fw_crash_state_show(struct device *cdev,
2717         struct device_attribute *attr, char *buf)
2718 {
2719         struct Scsi_Host *shost = class_to_shost(cdev);
2720         struct megasas_instance *instance =
2721                 (struct megasas_instance *) shost->hostdata;
2722         return snprintf(buf, PAGE_SIZE, "%d\n", instance->fw_crash_state);
2723 }
2724 
2725 static ssize_t
2726 megasas_page_size_show(struct device *cdev,
2727         struct device_attribute *attr, char *buf)
2728 {
2729         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)PAGE_SIZE - 1);
2730 }
2731 
2732 static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR,
2733         megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store);
2734 static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO,
2735         megasas_fw_crash_buffer_size_show, NULL);
2736 static DEVICE_ATTR(fw_crash_state, S_IRUGO | S_IWUSR,
2737         megasas_fw_crash_state_show, megasas_fw_crash_state_store);
2738 static DEVICE_ATTR(page_size, S_IRUGO,
2739         megasas_page_size_show, NULL);
2740 
2741 struct device_attribute *megaraid_host_attrs[] = {
2742         &dev_attr_fw_crash_buffer_size,
2743         &dev_attr_fw_crash_buffer,
2744         &dev_attr_fw_crash_state,
2745         &dev_attr_page_size,
2746         NULL,
2747 };
2748 
2749 /*
2750  * Scsi host template for megaraid_sas driver
2751  */
2752 static struct scsi_host_template megasas_template = {
2753 
2754         .module = THIS_MODULE,
2755         .name = "LSI SAS based MegaRAID driver",
2756         .proc_name = "megaraid_sas",
2757         .slave_configure = megasas_slave_configure,
2758         .slave_alloc = megasas_slave_alloc,
2759         .queuecommand = megasas_queue_command,
2760         .eh_device_reset_handler = megasas_reset_device,
2761         .eh_bus_reset_handler = megasas_reset_bus_host,
2762         .eh_host_reset_handler = megasas_reset_bus_host,
2763         .eh_timed_out = megasas_reset_timer,
2764         .shost_attrs = megaraid_host_attrs,
2765         .bios_param = megasas_bios_param,
2766         .use_clustering = ENABLE_CLUSTERING,
2767         .change_queue_depth = megasas_change_queue_depth,
2768         .no_write_same = 1,
2769 };
2770 
2771 /**
2772  * megasas_complete_int_cmd -   Completes an internal command
2773  * @instance:                   Adapter soft state
2774  * @cmd:                        Command to be completed
2775  *
2776  * The megasas_issue_blocked_cmd() function waits for a command to complete
2777  * after it issues a command. This function wakes up that waiting routine by
2778  * calling wake_up() on the wait queue.
2779  */
2780 static void
2781 megasas_complete_int_cmd(struct megasas_instance *instance,
2782                          struct megasas_cmd *cmd)
2783 {
2784         cmd->cmd_status = cmd->frame->io.cmd_status;
2785 
2786         if (cmd->cmd_status == ENODATA) {
2787                 cmd->cmd_status = 0;
2788         }
2789         wake_up(&instance->int_cmd_wait_q);
2790 }
2791 
2792 /**
2793  * megasas_complete_abort -     Completes aborting a command
2794  * @instance:                   Adapter soft state
2795  * @cmd:                        Cmd that was issued to abort another cmd
2796  *
2797  * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2798  * after it issues an abort on a previously issued command. This function
2799  * wakes up all functions waiting on the same wait queue.
2800  */
2801 static void
2802 megasas_complete_abort(struct megasas_instance *instance,
2803                        struct megasas_cmd *cmd)
2804 {
2805         if (cmd->sync_cmd) {
2806                 cmd->sync_cmd = 0;
2807                 cmd->cmd_status = 0;
2808                 wake_up(&instance->abort_cmd_wait_q);
2809         }
2810 
2811         return;
2812 }
2813 
2814 /**
2815  * megasas_complete_cmd -       Completes a command
2816  * @instance:                   Adapter soft state
2817  * @cmd:                        Command to be completed
2818  * @alt_status:                 If non-zero, use this value as status to
2819  *                              SCSI mid-layer instead of the value returned
2820  *                              by the FW. This should be used if caller wants
2821  *                              an alternate status (as in the case of aborted
2822  *                              commands)
2823  */
2824 void
2825 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2826                      u8 alt_status)
2827 {
2828         int exception = 0;
2829         struct megasas_header *hdr = &cmd->frame->hdr;
2830         unsigned long flags;
2831         struct fusion_context *fusion = instance->ctrl_context;
2832         u32 opcode;
2833 
2834         /* flag for the retry reset */
2835         cmd->retry_for_fw_reset = 0;
2836 
2837         if (cmd->scmd)
2838                 cmd->scmd->SCp.ptr = NULL;
2839 
2840         switch (hdr->cmd) {
2841         case MFI_CMD_INVALID:
2842                 /* Some older 1068 controller FW may keep a pended
2843                    MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
2844                    when booting the kdump kernel.  Ignore this command to
2845                    prevent a kernel panic on shutdown of the kdump kernel. */
2846                 printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command "
2847                        "completed.\n");
2848                 printk(KERN_WARNING "megaraid_sas: If you have a controller "
2849                        "other than PERC5, please upgrade your firmware.\n");
2850                 break;
2851         case MFI_CMD_PD_SCSI_IO:
2852         case MFI_CMD_LD_SCSI_IO:
2853 
2854                 /*
2855                  * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2856                  * issued either through an IO path or an IOCTL path. If it
2857                  * was via IOCTL, we will send it to internal completion.
2858                  */
2859                 if (cmd->sync_cmd) {
2860                         cmd->sync_cmd = 0;
2861                         megasas_complete_int_cmd(instance, cmd);
2862                         break;
2863                 }
2864 
2865         case MFI_CMD_LD_READ:
2866         case MFI_CMD_LD_WRITE:
2867 
2868                 if (alt_status) {
2869                         cmd->scmd->result = alt_status << 16;
2870                         exception = 1;
2871                 }
2872 
2873                 if (exception) {
2874 
2875                         atomic_dec(&instance->fw_outstanding);
2876 
2877                         scsi_dma_unmap(cmd->scmd);
2878                         cmd->scmd->scsi_done(cmd->scmd);
2879                         megasas_return_cmd(instance, cmd);
2880 
2881                         break;
2882                 }
2883 
2884                 switch (hdr->cmd_status) {
2885 
2886                 case MFI_STAT_OK:
2887                         cmd->scmd->result = DID_OK << 16;
2888                         break;
2889 
2890                 case MFI_STAT_SCSI_IO_FAILED:
2891                 case MFI_STAT_LD_INIT_IN_PROGRESS:
2892                         cmd->scmd->result =
2893                             (DID_ERROR << 16) | hdr->scsi_status;
2894                         break;
2895 
2896                 case MFI_STAT_SCSI_DONE_WITH_ERROR:
2897 
2898                         cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2899 
2900                         if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2901                                 memset(cmd->scmd->sense_buffer, 0,
2902                                        SCSI_SENSE_BUFFERSIZE);
2903                                 memcpy(cmd->scmd->sense_buffer, cmd->sense,
2904                                        hdr->sense_len);
2905 
2906                                 cmd->scmd->result |= DRIVER_SENSE << 24;
2907                         }
2908 
2909                         break;
2910 
2911                 case MFI_STAT_LD_OFFLINE:
2912                 case MFI_STAT_DEVICE_NOT_FOUND:
2913                         cmd->scmd->result = DID_BAD_TARGET << 16;
2914                         break;
2915 
2916                 default:
2917                         printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2918                                hdr->cmd_status);
2919                         cmd->scmd->result = DID_ERROR << 16;
2920                         break;
2921                 }
2922 
2923                 atomic_dec(&instance->fw_outstanding);
2924 
2925                 scsi_dma_unmap(cmd->scmd);
2926                 cmd->scmd->scsi_done(cmd->scmd);
2927                 megasas_return_cmd(instance, cmd);
2928 
2929                 break;
2930 
2931         case MFI_CMD_SMP:
2932         case MFI_CMD_STP:
2933         case MFI_CMD_DCMD:
2934                 opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
2935                 /* Check for LD map update */
2936                 if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
2937                         && (cmd->frame->dcmd.mbox.b[1] == 1)) {
2938                         fusion->fast_path_io = 0;
2939                         spin_lock_irqsave(instance->host->host_lock, flags);
2940                         if (cmd->frame->hdr.cmd_status != 0) {
2941                                 if (cmd->frame->hdr.cmd_status !=
2942                                     MFI_STAT_NOT_FOUND)
2943                                         printk(KERN_WARNING "megasas: map sync"
2944                                                "failed, status = 0x%x.\n",
2945                                                cmd->frame->hdr.cmd_status);
2946                                 else {
2947                                         megasas_return_mfi_mpt_pthr(instance,
2948                                                 cmd, cmd->mpt_pthr_cmd_blocked);
2949                                         spin_unlock_irqrestore(
2950                                                 instance->host->host_lock,
2951                                                 flags);
2952                                         break;
2953                                 }
2954                         } else
2955                                 instance->map_id++;
2956                         megasas_return_mfi_mpt_pthr(instance, cmd,
2957                                 cmd->mpt_pthr_cmd_blocked);
2958 
2959                         /*
2960                          * Set fast path IO to ZERO.
2961                          * Validate Map will set proper value.
2962                          * Meanwhile all IOs will go as LD IO.
2963                          */
2964                         if (MR_ValidateMapInfo(instance))
2965                                 fusion->fast_path_io = 1;
2966                         else
2967                                 fusion->fast_path_io = 0;
2968                         megasas_sync_map_info(instance);
2969                         spin_unlock_irqrestore(instance->host->host_lock,
2970                                                flags);
2971                         break;
2972                 }
2973                 if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
2974                     opcode == MR_DCMD_CTRL_EVENT_GET) {
2975                         spin_lock_irqsave(&poll_aen_lock, flags);
2976                         megasas_poll_wait_aen = 0;
2977                         spin_unlock_irqrestore(&poll_aen_lock, flags);
2978                 }
2979 
2980                 /*
2981                  * See if got an event notification
2982                  */
2983                 if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
2984                         megasas_service_aen(instance, cmd);
2985                 else
2986                         megasas_complete_int_cmd(instance, cmd);
2987 
2988                 break;
2989 
2990         case MFI_CMD_ABORT:
2991                 /*
2992                  * Cmd issued to abort another cmd returned
2993                  */
2994                 megasas_complete_abort(instance, cmd);
2995                 break;
2996 
2997         default:
2998                 printk("megasas: Unknown command completed! [0x%X]\n",
2999                        hdr->cmd);
3000                 break;
3001         }
3002 }
3003 
3004 /**
3005  * megasas_issue_pending_cmds_again -   issue all pending cmds
3006  *                                      in FW again because of the fw reset
3007  * @instance:                           Adapter soft state
3008  */
3009 static inline void
3010 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
3011 {
3012         struct megasas_cmd *cmd;
3013         struct list_head clist_local;
3014         union megasas_evt_class_locale class_locale;
3015         unsigned long flags;
3016         u32 seq_num;
3017 
3018         INIT_LIST_HEAD(&clist_local);
3019         spin_lock_irqsave(&instance->hba_lock, flags);
3020         list_splice_init(&instance->internal_reset_pending_q, &clist_local);
3021         spin_unlock_irqrestore(&instance->hba_lock, flags);
3022 
3023         while (!list_empty(&clist_local)) {
3024                 cmd     = list_entry((&clist_local)->next,
3025                                         struct megasas_cmd, list);
3026                 list_del_init(&cmd->list);
3027 
3028                 if (cmd->sync_cmd || cmd->scmd) {
3029                         printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
3030                                 "detected to be pending while HBA reset.\n",
3031                                         cmd, cmd->scmd, cmd->sync_cmd);
3032 
3033                         cmd->retry_for_fw_reset++;
3034 
3035                         if (cmd->retry_for_fw_reset == 3) {
3036                                 printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
3037                                         "was tried multiple times during reset."
3038                                         "Shutting down the HBA\n",
3039                                         cmd, cmd->scmd, cmd->sync_cmd);
3040                                 megaraid_sas_kill_hba(instance);
3041 
3042                                 instance->adprecovery =
3043                                                 MEGASAS_HW_CRITICAL_ERROR;
3044                                 return;
3045                         }
3046                 }
3047 
3048                 if (cmd->sync_cmd == 1) {
3049                         if (cmd->scmd) {
3050                                 printk(KERN_NOTICE "megaraid_sas: unexpected"
3051                                         "cmd attached to internal command!\n");
3052                         }
3053                         printk(KERN_NOTICE "megasas: %p synchronous cmd"
3054                                                 "on the internal reset queue,"
3055                                                 "issue it again.\n", cmd);
3056                         cmd->cmd_status = ENODATA;
3057                         instance->instancet->fire_cmd(instance,
3058                                                         cmd->frame_phys_addr ,
3059                                                         0, instance->reg_set);
3060                 } else if (cmd->scmd) {
3061                         printk(KERN_NOTICE "megasas: %p scsi cmd [%02x]"
3062                         "detected on the internal queue, issue again.\n",
3063                         cmd, cmd->scmd->cmnd[0]);
3064 
3065                         atomic_inc(&instance->fw_outstanding);
3066                         instance->instancet->fire_cmd(instance,
3067                                         cmd->frame_phys_addr,
3068                                         cmd->frame_count-1, instance->reg_set);
3069                 } else {
3070                         printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
3071                                 "internal reset defer list while re-issue!!\n",
3072                                 cmd);
3073                 }
3074         }
3075 
3076         if (instance->aen_cmd) {
3077                 printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
3078                 megasas_return_cmd(instance, instance->aen_cmd);
3079 
3080                 instance->aen_cmd       = NULL;
3081         }
3082 
3083         /*
3084         * Initiate AEN (Asynchronous Event Notification)
3085         */
3086         seq_num = instance->last_seq_num;
3087         class_locale.members.reserved = 0;
3088         class_locale.members.locale = MR_EVT_LOCALE_ALL;
3089         class_locale.members.class = MR_EVT_CLASS_DEBUG;
3090 
3091         megasas_register_aen(instance, seq_num, class_locale.word);
3092 }
3093 
3094 /**
3095  * Move the internal reset pending commands to a deferred queue.
3096  *
3097  * We move the commands pending at internal reset time to a
3098  * pending queue. This queue would be flushed after successful
3099  * completion of the internal reset sequence. if the internal reset
3100  * did not complete in time, the kernel reset handler would flush
3101  * these commands.
3102  **/
3103 static void
3104 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
3105 {
3106         struct megasas_cmd *cmd;
3107         int i;
3108         u32 max_cmd = instance->max_fw_cmds;
3109         u32 defer_index;
3110         unsigned long flags;
3111 
3112         defer_index     = 0;
3113         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
3114         for (i = 0; i < max_cmd; i++) {
3115                 cmd = instance->cmd_list[i];
3116                 if (cmd->sync_cmd == 1 || cmd->scmd) {
3117                         printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
3118                                         "on the defer queue as internal\n",
3119                                 defer_index, cmd, cmd->sync_cmd, cmd->scmd);
3120 
3121                         if (!list_empty(&cmd->list)) {
3122                                 printk(KERN_NOTICE "megaraid_sas: ERROR while"
3123                                         " moving this cmd:%p, %d %p, it was"
3124                                         "discovered on some list?\n",
3125                                         cmd, cmd->sync_cmd, cmd->scmd);
3126 
3127                                 list_del_init(&cmd->list);
3128                         }
3129                         defer_index++;
3130                         list_add_tail(&cmd->list,
3131                                 &instance->internal_reset_pending_q);
3132                 }
3133         }
3134         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
3135 }
3136 
3137 
3138 static void
3139 process_fw_state_change_wq(struct work_struct *work)
3140 {
3141         struct megasas_instance *instance =
3142                 container_of(work, struct megasas_instance, work_init);
3143         u32 wait;
3144         unsigned long flags;
3145 
3146         if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
3147                 printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
3148                                 instance->adprecovery);
3149                 return ;
3150         }
3151 
3152         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
3153                 printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
3154                                         "state, restarting it...\n");
3155 
3156                 instance->instancet->disable_intr(instance);
3157                 atomic_set(&instance->fw_outstanding, 0);
3158 
3159                 atomic_set(&instance->fw_reset_no_pci_access, 1);
3160                 instance->instancet->adp_reset(instance, instance->reg_set);
3161                 atomic_set(&instance->fw_reset_no_pci_access, 0 );
3162 
3163                 printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
3164                                         "initiating next stage...\n");
3165 
3166                 printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
3167                                         "state 2 starting...\n");
3168 
3169                 /*waitting for about 20 second before start the second init*/
3170                 for (wait = 0; wait < 30; wait++) {
3171                         msleep(1000);
3172                 }
3173 
3174                 if (megasas_transition_to_ready(instance, 1)) {
3175                         printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
3176 
3177                         megaraid_sas_kill_hba(instance);
3178                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
3179                         return ;
3180                 }
3181 
3182                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
3183                         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
3184                         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
3185                         ) {
3186                         *instance->consumer = *instance->producer;
3187                 } else {
3188                         *instance->consumer = 0;
3189                         *instance->producer = 0;
3190                 }
3191 
3192                 megasas_issue_init_mfi(instance);
3193 
3194                 spin_lock_irqsave(&instance->hba_lock, flags);
3195                 instance->adprecovery   = MEGASAS_HBA_OPERATIONAL;
3196                 spin_unlock_irqrestore(&instance->hba_lock, flags);
3197                 instance->instancet->enable_intr(instance);
3198 
3199                 megasas_issue_pending_cmds_again(instance);
3200                 instance->issuepend_done = 1;
3201         }
3202         return ;
3203 }
3204 
3205 /**
3206  * megasas_deplete_reply_queue -        Processes all completed commands
3207  * @instance:                           Adapter soft state
3208  * @alt_status:                         Alternate status to be returned to
3209  *                                      SCSI mid-layer instead of the status
3210  *                                      returned by the FW
3211  * Note: this must be called with hba lock held
3212  */
3213 static int
3214 megasas_deplete_reply_queue(struct megasas_instance *instance,
3215                                         u8 alt_status)
3216 {
3217         u32 mfiStatus;
3218         u32 fw_state;
3219 
3220         if ((mfiStatus = instance->instancet->check_reset(instance,
3221                                         instance->reg_set)) == 1) {
3222                 return IRQ_HANDLED;
3223         }
3224 
3225         if ((mfiStatus = instance->instancet->clear_intr(
3226                                                 instance->reg_set)
3227                                                 ) == 0) {
3228                 /* Hardware may not set outbound_intr_status in MSI-X mode */
3229                 if (!instance->msix_vectors)
3230                         return IRQ_NONE;
3231         }
3232 
3233         instance->mfiStatus = mfiStatus;
3234 
3235         if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
3236                 fw_state = instance->instancet->read_fw_status_reg(
3237                                 instance->reg_set) & MFI_STATE_MASK;
3238 
3239                 if (fw_state != MFI_STATE_FAULT) {
3240                         printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
3241                                                 fw_state);
3242                 }
3243 
3244                 if ((fw_state == MFI_STATE_FAULT) &&
3245                                 (instance->disableOnlineCtrlReset == 0)) {
3246                         printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
3247 
3248                         if ((instance->pdev->device ==
3249                                         PCI_DEVICE_ID_LSI_SAS1064R) ||
3250                                 (instance->pdev->device ==
3251                                         PCI_DEVICE_ID_DELL_PERC5) ||
3252                                 (instance->pdev->device ==
3253                                         PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
3254 
3255                                 *instance->consumer =
3256                                         cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
3257                         }
3258 
3259 
3260                         instance->instancet->disable_intr(instance);
3261                         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
3262                         instance->issuepend_done = 0;
3263 
3264                         atomic_set(&instance->fw_outstanding, 0);
3265                         megasas_internal_reset_defer_cmds(instance);
3266 
3267                         printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
3268                                         fw_state, instance->adprecovery);
3269 
3270                         schedule_work(&instance->work_init);
3271                         return IRQ_HANDLED;
3272 
3273                 } else {
3274                         printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
3275                                 fw_state, instance->disableOnlineCtrlReset);
3276                 }
3277         }
3278 
3279         tasklet_schedule(&instance->isr_tasklet);
3280         return IRQ_HANDLED;
3281 }
3282 /**
3283  * megasas_isr - isr entry point
3284  */
3285 static irqreturn_t megasas_isr(int irq, void *devp)
3286 {
3287         struct megasas_irq_context *irq_context = devp;
3288         struct megasas_instance *instance = irq_context->instance;
3289         unsigned long flags;
3290         irqreturn_t     rc;
3291 
3292         if (atomic_read(&instance->fw_reset_no_pci_access))
3293                 return IRQ_HANDLED;
3294 
3295         spin_lock_irqsave(&instance->hba_lock, flags);
3296         rc =  megasas_deplete_reply_queue(instance, DID_OK);
3297         spin_unlock_irqrestore(&instance->hba_lock, flags);
3298 
3299         return rc;
3300 }
3301 
3302 /**
3303  * megasas_transition_to_ready -        Move the FW to READY state
3304  * @instance:                           Adapter soft state
3305  *
3306  * During the initialization, FW passes can potentially be in any one of
3307  * several possible states. If the FW in operational, waiting-for-handshake
3308  * states, driver must take steps to bring it to ready state. Otherwise, it
3309  * has to wait for the ready state.
3310  */
3311 int
3312 megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
3313 {
3314         int i;
3315         u8 max_wait;
3316         u32 fw_state;
3317         u32 cur_state;
3318         u32 abs_state, curr_abs_state;
3319 
3320         abs_state = instance->instancet->read_fw_status_reg(instance->reg_set);
3321         fw_state = abs_state & MFI_STATE_MASK;
3322 
3323         if (fw_state != MFI_STATE_READY)
3324                 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
3325                        " state\n");
3326 
3327         while (fw_state != MFI_STATE_READY) {
3328 
3329                 switch (fw_state) {
3330 
3331                 case MFI_STATE_FAULT:
3332                         printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
3333                         if (ocr) {
3334                                 max_wait = MEGASAS_RESET_WAIT_TIME;
3335                                 cur_state = MFI_STATE_FAULT;
3336                                 break;
3337                         } else
3338                                 return -ENODEV;
3339 
3340                 case MFI_STATE_WAIT_HANDSHAKE:
3341                         /*
3342                          * Set the CLR bit in inbound doorbell
3343                          */
3344                         if ((instance->pdev->device ==
3345                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3346                                 (instance->pdev->device ==
3347                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3348                                 (instance->pdev->device ==
3349                                 PCI_DEVICE_ID_LSI_FUSION) ||
3350                                 (instance->pdev->device ==
3351                                 PCI_DEVICE_ID_LSI_PLASMA) ||
3352                                 (instance->pdev->device ==
3353                                 PCI_DEVICE_ID_LSI_INVADER) ||
3354                                 (instance->pdev->device ==
3355                                 PCI_DEVICE_ID_LSI_FURY)) {
3356                                 writel(
3357                                   MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3358                                   &instance->reg_set->doorbell);
3359                         } else {
3360                                 writel(
3361                                     MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3362                                         &instance->reg_set->inbound_doorbell);
3363                         }
3364 
3365                         max_wait = MEGASAS_RESET_WAIT_TIME;
3366                         cur_state = MFI_STATE_WAIT_HANDSHAKE;
3367                         break;
3368 
3369                 case MFI_STATE_BOOT_MESSAGE_PENDING:
3370                         if ((instance->pdev->device ==
3371                              PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3372                                 (instance->pdev->device ==
3373                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3374                             (instance->pdev->device ==
3375                              PCI_DEVICE_ID_LSI_FUSION) ||
3376                             (instance->pdev->device ==
3377                              PCI_DEVICE_ID_LSI_PLASMA) ||
3378                             (instance->pdev->device ==
3379                              PCI_DEVICE_ID_LSI_INVADER) ||
3380                             (instance->pdev->device ==
3381                              PCI_DEVICE_ID_LSI_FURY)) {
3382                                 writel(MFI_INIT_HOTPLUG,
3383                                        &instance->reg_set->doorbell);
3384                         } else
3385                                 writel(MFI_INIT_HOTPLUG,
3386                                         &instance->reg_set->inbound_doorbell);
3387 
3388                         max_wait = MEGASAS_RESET_WAIT_TIME;
3389                         cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
3390                         break;
3391 
3392                 case MFI_STATE_OPERATIONAL:
3393                         /*
3394                          * Bring it to READY state; assuming max wait 10 secs
3395                          */
3396                         instance->instancet->disable_intr(instance);
3397                         if ((instance->pdev->device ==
3398                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3399                                 (instance->pdev->device ==
3400                                 PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
3401                                 (instance->pdev->device
3402                                         == PCI_DEVICE_ID_LSI_FUSION) ||
3403                                 (instance->pdev->device
3404                                         == PCI_DEVICE_ID_LSI_PLASMA) ||
3405                                 (instance->pdev->device
3406                                         == PCI_DEVICE_ID_LSI_INVADER) ||
3407                                 (instance->pdev->device
3408                                         == PCI_DEVICE_ID_LSI_FURY)) {
3409                                 writel(MFI_RESET_FLAGS,
3410                                         &instance->reg_set->doorbell);
3411                                 if ((instance->pdev->device ==
3412                                         PCI_DEVICE_ID_LSI_FUSION) ||
3413                                         (instance->pdev->device ==
3414                                         PCI_DEVICE_ID_LSI_PLASMA) ||
3415                                         (instance->pdev->device ==
3416                                         PCI_DEVICE_ID_LSI_INVADER) ||
3417                                         (instance->pdev->device ==
3418                                         PCI_DEVICE_ID_LSI_FURY)) {
3419                                         for (i = 0; i < (10 * 1000); i += 20) {
3420                                                 if (readl(
3421                                                             &instance->
3422                                                             reg_set->
3423                                                             doorbell) & 1)
3424                                                         msleep(20);
3425                                                 else
3426                                                         break;
3427                                         }
3428                                 }
3429                         } else
3430                                 writel(MFI_RESET_FLAGS,
3431                                         &instance->reg_set->inbound_doorbell);
3432 
3433                         max_wait = MEGASAS_RESET_WAIT_TIME;
3434                         cur_state = MFI_STATE_OPERATIONAL;
3435                         break;
3436 
3437                 case MFI_STATE_UNDEFINED:
3438                         /*
3439                          * This state should not last for more than 2 seconds
3440                          */
3441                         max_wait = MEGASAS_RESET_WAIT_TIME;
3442                         cur_state = MFI_STATE_UNDEFINED;
3443                         break;
3444 
3445                 case MFI_STATE_BB_INIT:
3446                         max_wait = MEGASAS_RESET_WAIT_TIME;
3447                         cur_state = MFI_STATE_BB_INIT;
3448                         break;
3449 
3450                 case MFI_STATE_FW_INIT:
3451                         max_wait = MEGASAS_RESET_WAIT_TIME;
3452                         cur_state = MFI_STATE_FW_INIT;
3453                         break;
3454 
3455                 case MFI_STATE_FW_INIT_2:
3456                         max_wait = MEGASAS_RESET_WAIT_TIME;
3457                         cur_state = MFI_STATE_FW_INIT_2;
3458                         break;
3459 
3460                 case MFI_STATE_DEVICE_SCAN:
3461                         max_wait = MEGASAS_RESET_WAIT_TIME;
3462                         cur_state = MFI_STATE_DEVICE_SCAN;
3463                         break;
3464 
3465                 case MFI_STATE_FLUSH_CACHE:
3466                         max_wait = MEGASAS_RESET_WAIT_TIME;
3467                         cur_state = MFI_STATE_FLUSH_CACHE;
3468                         break;
3469 
3470                 default:
3471                         printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
3472                                fw_state);
3473                         return -ENODEV;
3474                 }
3475 
3476                 /*
3477                  * The cur_state should not last for more than max_wait secs
3478                  */
3479                 for (i = 0; i < (max_wait * 1000); i++) {
3480                         curr_abs_state = instance->instancet->
3481                                 read_fw_status_reg(instance->reg_set);
3482 
3483                         if (abs_state == curr_abs_state) {
3484                                 msleep(1);
3485                         } else
3486                                 break;
3487                 }
3488 
3489                 /*
3490                  * Return error if fw_state hasn't changed after max_wait
3491                  */
3492                 if (curr_abs_state == abs_state) {
3493                         printk(KERN_DEBUG "FW state [%d] hasn't changed "
3494                                "in %d secs\n", fw_state, max_wait);
3495                         return -ENODEV;
3496                 }
3497 
3498                 abs_state = curr_abs_state;
3499                 fw_state = curr_abs_state & MFI_STATE_MASK;
3500         }
3501         printk(KERN_INFO "megasas: FW now in Ready state\n");
3502 
3503         return 0;
3504 }
3505 
3506 /**
3507  * megasas_teardown_frame_pool -        Destroy the cmd frame DMA pool
3508  * @instance:                           Adapter soft state
3509  */
3510 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
3511 {
3512         int i;
3513         u32 max_cmd = instance->max_mfi_cmds;
3514         struct megasas_cmd *cmd;
3515 
3516         if (!instance->frame_dma_pool)
3517                 return;
3518 
3519         /*
3520          * Return all frames to pool
3521          */
3522         for (i = 0; i < max_cmd; i++) {
3523 
3524                 cmd = instance->cmd_list[i];
3525 
3526                 if (cmd->frame)
3527                         pci_pool_free(instance->frame_dma_pool, cmd->frame,
3528                                       cmd->frame_phys_addr);
3529 
3530                 if (cmd->sense)
3531                         pci_pool_free(instance->sense_dma_pool, cmd->sense,
3532                                       cmd->sense_phys_addr);
3533         }
3534 
3535         /*
3536          * Now destroy the pool itself
3537          */
3538         pci_pool_destroy(instance->frame_dma_pool);
3539         pci_pool_destroy(instance->sense_dma_pool);
3540 
3541         instance->frame_dma_pool = NULL;
3542         instance->sense_dma_pool = NULL;
3543 }
3544 
3545 /**
3546  * megasas_create_frame_pool -  Creates DMA pool for cmd frames
3547  * @instance:                   Adapter soft state
3548  *
3549  * Each command packet has an embedded DMA memory buffer that is used for
3550  * filling MFI frame and the SG list that immediately follows the frame. This
3551  * function creates those DMA memory buffers for each command packet by using
3552  * PCI pool facility.
3553  */
3554 static int megasas_create_frame_pool(struct megasas_instance *instance)
3555 {
3556         int i;
3557         u32 max_cmd;
3558         u32 sge_sz;
3559         u32 sgl_sz;
3560         u32 total_sz;
3561         u32 frame_count;
3562         struct megasas_cmd *cmd;
3563 
3564         max_cmd = instance->max_mfi_cmds;
3565 
3566         /*
3567          * Size of our frame is 64 bytes for MFI frame, followed by max SG
3568          * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
3569          */
3570         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
3571             sizeof(struct megasas_sge32);
3572 
3573         if (instance->flag_ieee) {
3574                 sge_sz = sizeof(struct megasas_sge_skinny);
3575         }
3576 
3577         /*
3578          * Calculated the number of 64byte frames required for SGL
3579          */
3580         sgl_sz = sge_sz * instance->max_num_sge;
3581         frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
3582         frame_count = 15;
3583 
3584         /*
3585          * We need one extra frame for the MFI command
3586          */
3587         frame_count++;
3588 
3589         total_sz = MEGAMFI_FRAME_SIZE * frame_count;
3590         /*
3591          * Use DMA pool facility provided by PCI layer
3592          */
3593         instance->frame_dma_pool = pci_pool_create("megasas frame pool",
3594                                                    instance->pdev, total_sz, 64,
3595                                                    0);
3596 
3597         if (!instance->frame_dma_pool) {
3598                 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
3599                 return -ENOMEM;
3600         }
3601 
3602         instance->sense_dma_pool = pci_pool_create("megasas sense pool",
3603                                                    instance->pdev, 128, 4, 0);
3604 
3605         if (!instance->sense_dma_pool) {
3606                 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
3607 
3608                 pci_pool_destroy(instance->frame_dma_pool);
3609                 instance->frame_dma_pool = NULL;
3610 
3611                 return -ENOMEM;
3612         }
3613 
3614         /*
3615          * Allocate and attach a frame to each of the commands in cmd_list.
3616          * By making cmd->index as the context instead of the &cmd, we can
3617          * always use 32bit context regardless of the architecture
3618          */
3619         for (i = 0; i < max_cmd; i++) {
3620 
3621                 cmd = instance->cmd_list[i];
3622 
3623                 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
3624                                             GFP_KERNEL, &cmd->frame_phys_addr);
3625 
3626                 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
3627                                             GFP_KERNEL, &cmd->sense_phys_addr);
3628 
3629                 /*
3630                  * megasas_teardown_frame_pool() takes care of freeing
3631                  * whatever has been allocated
3632                  */
3633                 if (!cmd->frame || !cmd->sense) {
3634                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
3635                         megasas_teardown_frame_pool(instance);
3636                         return -ENOMEM;
3637                 }
3638 
3639                 memset(cmd->frame, 0, total_sz);
3640                 cmd->frame->io.context = cpu_to_le32(cmd->index);
3641                 cmd->frame->io.pad_0 = 0;
3642                 if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
3643                     (instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
3644                     (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
3645                         (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
3646                     (reset_devices))
3647                         cmd->frame->hdr.cmd = MFI_CMD_INVALID;
3648         }
3649 
3650         return 0;
3651 }
3652 
3653 /**
3654  * megasas_free_cmds -  Free all the cmds in the free cmd pool
3655  * @instance:           Adapter soft state
3656  */
3657 void megasas_free_cmds(struct megasas_instance *instance)
3658 {
3659         int i;
3660         /* First free the MFI frame pool */
3661         megasas_teardown_frame_pool(instance);
3662 
3663         /* Free all the commands in the cmd_list */
3664         for (i = 0; i < instance->max_mfi_cmds; i++)
3665 
3666                 kfree(instance->cmd_list[i]);
3667 
3668         /* Free the cmd_list buffer itself */
3669         kfree(instance->cmd_list);
3670         instance->cmd_list = NULL;
3671 
3672         INIT_LIST_HEAD(&instance->cmd_pool);
3673 }
3674 
3675 /**
3676  * megasas_alloc_cmds - Allocates the command packets
3677  * @instance:           Adapter soft state
3678  *
3679  * Each command that is issued to the FW, whether IO commands from the OS or
3680  * internal commands like IOCTLs, are wrapped in local data structure called
3681  * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
3682  * the FW.
3683  *
3684  * Each frame has a 32-bit field called context (tag). This context is used
3685  * to get back the megasas_cmd from the frame when a frame gets completed in
3686  * the ISR. Typically the address of the megasas_cmd itself would be used as
3687  * the context. But we wanted to keep the differences between 32 and 64 bit
3688  * systems to the mininum. We always use 32 bit integers for the context. In
3689  * this driver, the 32 bit values are the indices into an array cmd_list.
3690  * This array is used only to look up the megasas_cmd given the context. The
3691  * free commands themselves are maintained in a linked list called cmd_pool.
3692  */
3693 int megasas_alloc_cmds(struct megasas_instance *instance)
3694 {
3695         int i;
3696         int j;
3697         u32 max_cmd;
3698         struct megasas_cmd *cmd;
3699         struct fusion_context *fusion;
3700 
3701         fusion = instance->ctrl_context;
3702         max_cmd = instance->max_mfi_cmds;
3703 
3704         /*
3705          * instance->cmd_list is an array of struct megasas_cmd pointers.
3706          * Allocate the dynamic array first and then allocate individual
3707          * commands.
3708          */
3709         instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
3710 
3711         if (!instance->cmd_list) {
3712                 printk(KERN_DEBUG "megasas: out of memory\n");
3713                 return -ENOMEM;
3714         }
3715 
3716         memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
3717 
3718         for (i = 0; i < max_cmd; i++) {
3719                 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
3720                                                 GFP_KERNEL);
3721 
3722                 if (!instance->cmd_list[i]) {
3723 
3724                         for (j = 0; j < i; j++)
3725                                 kfree(instance->cmd_list[j]);
3726 
3727                         kfree(instance->cmd_list);
3728                         instance->cmd_list = NULL;
3729 
3730                         return -ENOMEM;
3731                 }
3732         }
3733 
3734         for (i = 0; i < max_cmd; i++) {
3735                 cmd = instance->cmd_list[i];
3736                 memset(cmd, 0, sizeof(struct megasas_cmd));
3737                 cmd->index = i;
3738                 atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
3739                 cmd->scmd = NULL;
3740                 cmd->instance = instance;
3741 
3742                 list_add_tail(&cmd->list, &instance->cmd_pool);
3743         }
3744 
3745         /*
3746          * Create a frame pool and assign one frame to each cmd
3747          */
3748         if (megasas_create_frame_pool(instance)) {
3749                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
3750                 megasas_free_cmds(instance);
3751         }
3752 
3753         return 0;
3754 }
3755 
3756 /*
3757  * megasas_get_pd_list_info -   Returns FW's pd_list structure
3758  * @instance:                           Adapter soft state
3759  * @pd_list:                            pd_list structure
3760  *
3761  * Issues an internal command (DCMD) to get the FW's controller PD
3762  * list structure.  This information is mainly used to find out SYSTEM
3763  * supported by the FW.
3764  */
3765 static int
3766 megasas_get_pd_list(struct megasas_instance *instance)
3767 {
3768         int ret = 0, pd_index = 0;
3769         struct megasas_cmd *cmd;
3770         struct megasas_dcmd_frame *dcmd;
3771         struct MR_PD_LIST *ci;
3772         struct MR_PD_ADDRESS *pd_addr;
3773         dma_addr_t ci_h = 0;
3774 
3775         cmd = megasas_get_cmd(instance);
3776 
3777         if (!cmd) {
3778                 printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3779                 return -ENOMEM;
3780         }
3781 
3782         dcmd = &cmd->frame->dcmd;
3783 
3784         ci = pci_alloc_consistent(instance->pdev,
3785                   MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3786 
3787         if (!ci) {
3788                 printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3789                 megasas_return_cmd(instance, cmd);
3790                 return -ENOMEM;
3791         }
3792 
3793         memset(ci, 0, sizeof(*ci));
3794         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3795 
3796         dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3797         dcmd->mbox.b[1] = 0;
3798         dcmd->cmd = MFI_CMD_DCMD;
3799         dcmd->cmd_status = 0xFF;
3800         dcmd->sge_count = 1;
3801         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3802         dcmd->timeout = 0;
3803         dcmd->pad_0 = 0;
3804         dcmd->data_xfer_len = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3805         dcmd->opcode = cpu_to_le32(MR_DCMD_PD_LIST_QUERY);
3806         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3807         dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3808 
3809         if (instance->ctrl_context && !instance->mask_interrupts)
3810                 ret = megasas_issue_blocked_cmd(instance, cmd,
3811                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3812         else
3813                 ret = megasas_issue_polled(instance, cmd);
3814 
3815         /*
3816         * the following function will get the instance PD LIST.
3817         */
3818 
3819         pd_addr = ci->addr;
3820 
3821         if ( ret == 0 &&
3822              (le32_to_cpu(ci->count) <
3823                   (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3824 
3825                 memset(instance->local_pd_list, 0,
3826                         MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3827 
3828                 for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) {
3829 
3830                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid     =
3831                                 le16_to_cpu(pd_addr->deviceId);
3832                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType       =
3833                                                         pd_addr->scsiDevType;
3834                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState      =
3835                                                         MR_PD_STATE_SYSTEM;
3836                         pd_addr++;
3837                 }
3838                 memcpy(instance->pd_list, instance->local_pd_list,
3839                         sizeof(instance->pd_list));
3840         }
3841 
3842         pci_free_consistent(instance->pdev,
3843                                 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3844                                 ci, ci_h);
3845 
3846         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3847                 megasas_return_mfi_mpt_pthr(instance, cmd,
3848                         cmd->mpt_pthr_cmd_blocked);
3849         else
3850                 megasas_return_cmd(instance, cmd);
3851 
3852         return ret;
3853 }
3854 
3855 /*
3856  * megasas_get_ld_list_info -   Returns FW's ld_list structure
3857  * @instance:                           Adapter soft state
3858  * @ld_list:                            ld_list structure
3859  *
3860  * Issues an internal command (DCMD) to get the FW's controller PD
3861  * list structure.  This information is mainly used to find out SYSTEM
3862  * supported by the FW.
3863  */
3864 static int
3865 megasas_get_ld_list(struct megasas_instance *instance)
3866 {
3867         int ret = 0, ld_index = 0, ids = 0;
3868         struct megasas_cmd *cmd;
3869         struct megasas_dcmd_frame *dcmd;
3870         struct MR_LD_LIST *ci;
3871         dma_addr_t ci_h = 0;
3872         u32 ld_count;
3873 
3874         cmd = megasas_get_cmd(instance);
3875 
3876         if (!cmd) {
3877                 printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3878                 return -ENOMEM;
3879         }
3880 
3881         dcmd = &cmd->frame->dcmd;
3882 
3883         ci = pci_alloc_consistent(instance->pdev,
3884                                 sizeof(struct MR_LD_LIST),
3885                                 &ci_h);
3886 
3887         if (!ci) {
3888                 printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3889                 megasas_return_cmd(instance, cmd);
3890                 return -ENOMEM;
3891         }
3892 
3893         memset(ci, 0, sizeof(*ci));
3894         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3895 
3896         if (instance->supportmax256vd)
3897                 dcmd->mbox.b[0] = 1;
3898         dcmd->cmd = MFI_CMD_DCMD;
3899         dcmd->cmd_status = 0xFF;
3900         dcmd->sge_count = 1;
3901         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3902         dcmd->timeout = 0;
3903         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_LIST));
3904         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_GET_LIST);
3905         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3906         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST));
3907         dcmd->pad_0  = 0;
3908 
3909         if (instance->ctrl_context && !instance->mask_interrupts)
3910                 ret = megasas_issue_blocked_cmd(instance, cmd,
3911                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3912         else
3913                 ret = megasas_issue_polled(instance, cmd);
3914 
3915 
3916         ld_count = le32_to_cpu(ci->ldCount);
3917 
3918         /* the following function will get the instance PD LIST */
3919 
3920         if ((ret == 0) && (ld_count <= instance->fw_supported_vd_count)) {
3921                 memset(instance->ld_ids, 0xff, MAX_LOGICAL_DRIVES_EXT);
3922 
3923                 for (ld_index = 0; ld_index < ld_count; ld_index++) {
3924                         if (ci->ldList[ld_index].state != 0) {
3925                                 ids = ci->ldList[ld_index].ref.targetId;
3926                                 instance->ld_ids[ids] =
3927                                         ci->ldList[ld_index].ref.targetId;
3928                         }
3929                 }
3930         }
3931 
3932         pci_free_consistent(instance->pdev,
3933                                 sizeof(struct MR_LD_LIST),
3934                                 ci,
3935                                 ci_h);
3936 
3937         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3938                 megasas_return_mfi_mpt_pthr(instance, cmd,
3939                         cmd->mpt_pthr_cmd_blocked);
3940         else
3941                 megasas_return_cmd(instance, cmd);
3942         return ret;
3943 }
3944 
3945 /**
3946  * megasas_ld_list_query -      Returns FW's ld_list structure
3947  * @instance:                           Adapter soft state
3948  * @ld_list:                            ld_list structure
3949  *
3950  * Issues an internal command (DCMD) to get the FW's controller PD
3951  * list structure.  This information is mainly used to find out SYSTEM
3952  * supported by the FW.
3953  */
3954 static int
3955 megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
3956 {
3957         int ret = 0, ld_index = 0, ids = 0;
3958         struct megasas_cmd *cmd;
3959         struct megasas_dcmd_frame *dcmd;
3960         struct MR_LD_TARGETID_LIST *ci;
3961         dma_addr_t ci_h = 0;
3962         u32 tgtid_count;
3963 
3964         cmd = megasas_get_cmd(instance);
3965 
3966         if (!cmd) {
3967                 printk(KERN_WARNING
3968                        "megasas:(megasas_ld_list_query): Failed to get cmd\n");
3969                 return -ENOMEM;
3970         }
3971 
3972         dcmd = &cmd->frame->dcmd;
3973 
3974         ci = pci_alloc_consistent(instance->pdev,
3975                                   sizeof(struct MR_LD_TARGETID_LIST), &ci_h);
3976 
3977         if (!ci) {
3978                 printk(KERN_WARNING
3979                        "megasas: Failed to alloc mem for ld_list_query\n");
3980                 megasas_return_cmd(instance, cmd);
3981                 return -ENOMEM;
3982         }
3983 
3984         memset(ci, 0, sizeof(*ci));
3985         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3986 
3987         dcmd->mbox.b[0] = query_type;
3988         if (instance->supportmax256vd)
3989                 dcmd->mbox.b[2] = 1;
3990 
3991         dcmd->cmd = MFI_CMD_DCMD;
3992         dcmd->cmd_status = 0xFF;
3993         dcmd->sge_count = 1;
3994         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3995         dcmd->timeout = 0;
3996         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
3997         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_LIST_QUERY);
3998         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3999         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
4000         dcmd->pad_0  = 0;
4001 
4002         if (instance->ctrl_context && !instance->mask_interrupts)
4003                 ret = megasas_issue_blocked_cmd(instance, cmd,
4004                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4005         else
4006                 ret = megasas_issue_polled(instance, cmd);
4007 
4008         tgtid_count = le32_to_cpu(ci->count);
4009 
4010         if ((ret == 0) && (tgtid_count <= (instance->fw_supported_vd_count))) {
4011                 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4012                 for (ld_index = 0; ld_index < tgtid_count; ld_index++) {
4013                         ids = ci->targetId[ld_index];
4014                         instance->ld_ids[ids] = ci->targetId[ld_index];
4015                 }
4016 
4017         }
4018 
4019         pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST),
4020                             ci, ci_h);
4021 
4022         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4023                 megasas_return_mfi_mpt_pthr(instance, cmd,
4024                         cmd->mpt_pthr_cmd_blocked);
4025         else
4026                 megasas_return_cmd(instance, cmd);
4027 
4028         return ret;
4029 }
4030 
4031 /**
4032  * megasas_get_controller_info -        Returns FW's controller structure
4033  * @instance:                           Adapter soft state
4034  * @ctrl_info:                          Controller information structure
4035  *
4036  * Issues an internal command (DCMD) to get the FW's controller structure.
4037  * This information is mainly used to find out the maximum IO transfer per
4038  * command supported by the FW.
4039  */
4040 int
4041 megasas_get_ctrl_info(struct megasas_instance *instance,
4042                       struct megasas_ctrl_info *ctrl_info)
4043 {
4044         int ret = 0;
4045         struct megasas_cmd *cmd;
4046         struct megasas_dcmd_frame *dcmd;
4047         struct megasas_ctrl_info *ci;
4048         dma_addr_t ci_h = 0;
4049 
4050         cmd = megasas_get_cmd(instance);
4051 
4052         if (!cmd) {
4053                 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
4054                 return -ENOMEM;
4055         }
4056 
4057         dcmd = &cmd->frame->dcmd;
4058 
4059         ci = pci_alloc_consistent(instance->pdev,
4060                                   sizeof(struct megasas_ctrl_info), &ci_h);
4061 
4062         if (!ci) {
4063                 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
4064                 megasas_return_cmd(instance, cmd);
4065                 return -ENOMEM;
4066         }
4067 
4068         memset(ci, 0, sizeof(*ci));
4069         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4070 
4071         dcmd->cmd = MFI_CMD_DCMD;
4072         dcmd->cmd_status = 0xFF;
4073         dcmd->sge_count = 1;
4074         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4075         dcmd->timeout = 0;
4076         dcmd->pad_0 = 0;
4077         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4078         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_GET_INFO);
4079         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
4080         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4081         dcmd->mbox.b[0] = 1;
4082 
4083         if (instance->ctrl_context && !instance->mask_interrupts)
4084                 ret = megasas_issue_blocked_cmd(instance, cmd,
4085                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4086         else
4087                 ret = megasas_issue_polled(instance, cmd);
4088 
4089         if (!ret)
4090                 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
4091 
4092         pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
4093                             ci, ci_h);
4094 
4095         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4096                 megasas_return_mfi_mpt_pthr(instance, cmd,
4097                         cmd->mpt_pthr_cmd_blocked);
4098         else
4099                 megasas_return_cmd(instance, cmd);
4100         return ret;
4101 }
4102 
4103 /*
4104  * megasas_set_crash_dump_params -      Sends address of crash dump DMA buffer
4105  *                                      to firmware
4106  *
4107  * @instance:                           Adapter soft state
4108  * @crash_buf_state             -       tell FW to turn ON/OFF crash dump feature
4109                                         MR_CRASH_BUF_TURN_OFF = 0
4110                                         MR_CRASH_BUF_TURN_ON = 1
4111  * @return 0 on success non-zero on failure.
4112  * Issues an internal command (DCMD) to set parameters for crash dump feature.
4113  * Driver will send address of crash dump DMA buffer and set mbox to tell FW
4114  * that driver supports crash dump feature. This DCMD will be sent only if
4115  * crash dump feature is supported by the FW.
4116  *
4117  */
4118 int megasas_set_crash_dump_params(struct megasas_instance *instance,
4119         u8 crash_buf_state)
4120 {
4121         int ret = 0;
4122         struct megasas_cmd *cmd;
4123         struct megasas_dcmd_frame *dcmd;
4124 
4125         cmd = megasas_get_cmd(instance);
4126 
4127         if (!cmd) {
4128                 dev_err(&instance->pdev->dev, "Failed to get a free cmd\n");
4129                 return -ENOMEM;
4130         }
4131 
4132 
4133         dcmd = &cmd->frame->dcmd;
4134 
4135         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4136         dcmd->mbox.b[0] = crash_buf_state;
4137         dcmd->cmd = MFI_CMD_DCMD;
4138         dcmd->cmd_status = 0xFF;
4139         dcmd->sge_count = 1;
4140         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
4141         dcmd->timeout = 0;
4142         dcmd->pad_0 = 0;
4143         dcmd->data_xfer_len = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4144         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SET_CRASH_DUMP_PARAMS);
4145         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->crash_dump_h);
4146         dcmd->sgl.sge32[0].length = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4147 
4148         if (instance->ctrl_context && !instance->mask_interrupts)
4149                 ret = megasas_issue_blocked_cmd(instance, cmd,
4150                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4151         else
4152                 ret = megasas_issue_polled(instance, cmd);
4153 
4154         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4155                 megasas_return_mfi_mpt_pthr(instance, cmd,
4156                         cmd->mpt_pthr_cmd_blocked);
4157         else
4158                 megasas_return_cmd(instance, cmd);
4159         return ret;
4160 }
4161 
4162 /**
4163  * megasas_issue_init_mfi -     Initializes the FW
4164  * @instance:           Adapter soft state
4165  *
4166  * Issues the INIT MFI cmd
4167  */
4168 static int
4169 megasas_issue_init_mfi(struct megasas_instance *instance)
4170 {
4171         u32 context;
4172 
4173         struct megasas_cmd *cmd;
4174 
4175         struct megasas_init_frame *init_frame;
4176         struct megasas_init_queue_info *initq_info;
4177         dma_addr_t init_frame_h;
4178         dma_addr_t initq_info_h;
4179 
4180         /*
4181          * Prepare a init frame. Note the init frame points to queue info
4182          * structure. Each frame has SGL allocated after first 64 bytes. For
4183          * this frame - since we don't need any SGL - we use SGL's space as
4184          * queue info structure
4185          *
4186          * We will not get a NULL command below. We just created the pool.
4187          */
4188         cmd = megasas_get_cmd(instance);
4189 
4190         init_frame = (struct megasas_init_frame *)cmd->frame;
4191         initq_info = (struct megasas_init_queue_info *)
4192                 ((unsigned long)init_frame + 64);
4193 
4194         init_frame_h = cmd->frame_phys_addr;
4195         initq_info_h = init_frame_h + 64;
4196 
4197         context = init_frame->context;
4198         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
4199         memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
4200         init_frame->context = context;
4201 
4202         initq_info->reply_queue_entries = cpu_to_le32(instance->max_fw_cmds + 1);
4203         initq_info->reply_queue_start_phys_addr_lo = cpu_to_le32(instance->reply_queue_h);
4204 
4205         initq_info->producer_index_phys_addr_lo = cpu_to_le32(instance->producer_h);
4206         initq_info->consumer_index_phys_addr_lo = cpu_to_le32(instance->consumer_h);
4207 
4208         init_frame->cmd = MFI_CMD_INIT;
4209         init_frame->cmd_status = 0xFF;
4210         init_frame->queue_info_new_phys_addr_lo =
4211                 cpu_to_le32(lower_32_bits(initq_info_h));
4212         init_frame->queue_info_new_phys_addr_hi =
4213                 cpu_to_le32(upper_32_bits(initq_info_h));
4214 
4215         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct megasas_init_queue_info));
4216 
4217         /*
4218          * disable the intr before firing the init frame to FW
4219          */
4220         instance->instancet->disable_intr(instance);
4221 
4222         /*
4223          * Issue the init frame in polled mode
4224          */
4225 
4226         if (megasas_issue_polled(instance, cmd)) {
4227                 printk(KERN_ERR "megasas: Failed to init firmware\n");
4228                 megasas_return_cmd(instance, cmd);
4229                 goto fail_fw_init;
4230         }
4231 
4232         megasas_return_cmd(instance, cmd);
4233 
4234         return 0;
4235 
4236 fail_fw_init:
4237         return -EINVAL;
4238 }
4239 
4240 static u32
4241 megasas_init_adapter_mfi(struct megasas_instance *instance)
4242 {
4243         struct megasas_register_set __iomem *reg_set;
4244         u32 context_sz;
4245         u32 reply_q_sz;
4246 
4247         reg_set = instance->reg_set;
4248 
4249         /*
4250          * Get various operational parameters from status register
4251          */
4252         instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
4253         /*
4254          * Reduce the max supported cmds by 1. This is to ensure that the
4255          * reply_q_sz (1 more than the max cmd that driver may send)
4256          * does not exceed max cmds that the FW can support
4257          */
4258         instance->max_fw_cmds = instance->max_fw_cmds-1;
4259         instance->max_mfi_cmds = instance->max_fw_cmds;
4260         instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
4261                                         0x10;
4262         /*
4263          * Create a pool of commands
4264          */
4265         if (megasas_alloc_cmds(instance))
4266                 goto fail_alloc_cmds;
4267 
4268         /*
4269          * Allocate memory for reply queue. Length of reply queue should
4270          * be _one_ more than the maximum commands handled by the firmware.
4271          *
4272          * Note: When FW completes commands, it places corresponding contex
4273          * values in this circular reply queue. This circular queue is a fairly
4274          * typical producer-consumer queue. FW is the producer (of completed
4275          * commands) and the driver is the consumer.
4276          */
4277         context_sz = sizeof(u32);
4278         reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
4279 
4280         instance->reply_queue = pci_alloc_consistent(instance->pdev,
4281                                                      reply_q_sz,
4282                                                      &instance->reply_queue_h);
4283 
4284         if (!instance->reply_queue) {
4285                 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
4286                 goto fail_reply_queue;
4287         }
4288 
4289         if (megasas_issue_init_mfi(instance))
4290                 goto fail_fw_init;
4291 
4292         if (megasas_get_ctrl_info(instance, instance->ctrl_info)) {
4293                 dev_err(&instance->pdev->dev, "(%d): Could get controller info "
4294                         "Fail from %s %d\n", instance->unique_id,
4295                         __func__, __LINE__);
4296                 goto fail_fw_init;
4297         }
4298 
4299         instance->fw_support_ieee = 0;
4300         instance->fw_support_ieee =
4301                 (instance->instancet->read_fw_status_reg(reg_set) &
4302                 0x04000000);
4303 
4304         printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
4305                         instance->fw_support_ieee);
4306 
4307         if (instance->fw_support_ieee)
4308                 instance->flag_ieee = 1;
4309 
4310         return 0;
4311 
4312 fail_fw_init:
4313 
4314         pci_free_consistent(instance->pdev, reply_q_sz,
4315                             instance->reply_queue, instance->reply_queue_h);
4316 fail_reply_queue:
4317         megasas_free_cmds(instance);
4318 
4319 fail_alloc_cmds:
4320         return 1;
4321 }
4322 
4323 /**
4324  * megasas_init_fw -    Initializes the FW
4325  * @instance:           Adapter soft state
4326  *
4327  * This is the main function for initializing firmware
4328  */
4329 
4330 static int megasas_init_fw(struct megasas_instance *instance)
4331 {
4332         u32 max_sectors_1;
4333         u32 max_sectors_2;
4334         u32 tmp_sectors, msix_enable, scratch_pad_2;
4335         resource_size_t base_addr;
4336         struct megasas_register_set __iomem *reg_set;
4337         struct megasas_ctrl_info *ctrl_info = NULL;
4338         unsigned long bar_list;
4339         int i, loop, fw_msix_count = 0;
4340         struct IOV_111 *iovPtr;
4341 
4342         /* Find first memory bar */
4343         bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
4344         instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
4345         if (pci_request_selected_regions(instance->pdev, instance->bar,
4346                                          "megasas: LSI")) {
4347                 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
4348                 return -EBUSY;
4349         }
4350 
4351         base_addr = pci_resource_start(instance->pdev, instance->bar);
4352         instance->reg_set = ioremap_nocache(base_addr, 8192);
4353 
4354         if (!instance->reg_set) {
4355                 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
4356                 goto fail_ioremap;
4357         }
4358 
4359         reg_set = instance->reg_set;
4360 
4361         switch (instance->pdev->device) {
4362         case PCI_DEVICE_ID_LSI_FUSION:
4363         case PCI_DEVICE_ID_LSI_PLASMA:
4364         case PCI_DEVICE_ID_LSI_INVADER:
4365         case PCI_DEVICE_ID_LSI_FURY:
4366                 instance->instancet = &megasas_instance_template_fusion;
4367                 break;
4368         case PCI_DEVICE_ID_LSI_SAS1078R:
4369         case PCI_DEVICE_ID_LSI_SAS1078DE:
4370                 instance->instancet = &megasas_instance_template_ppc;
4371                 break;
4372         case PCI_DEVICE_ID_LSI_SAS1078GEN2:
4373         case PCI_DEVICE_ID_LSI_SAS0079GEN2:
4374                 instance->instancet = &megasas_instance_template_gen2;
4375                 break;
4376         case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
4377         case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
4378                 instance->instancet = &megasas_instance_template_skinny;
4379                 break;
4380         case PCI_DEVICE_ID_LSI_SAS1064R:
4381         case PCI_DEVICE_ID_DELL_PERC5:
4382         default:
4383                 instance->instancet = &megasas_instance_template_xscale;
4384                 break;
4385         }
4386 
4387         if (megasas_transition_to_ready(instance, 0)) {
4388                 atomic_set(&instance->fw_reset_no_pci_access, 1);
4389                 instance->instancet->adp_reset
4390                         (instance, instance->reg_set);
4391                 atomic_set(&instance->fw_reset_no_pci_access, 0);
4392                 dev_info(&instance->pdev->dev,
4393                         "megasas: FW restarted successfully from %s!\n",
4394                         __func__);
4395 
4396                 /*waitting for about 30 second before retry*/
4397                 ssleep(30);
4398 
4399                 if (megasas_transition_to_ready(instance, 0))
4400                         goto fail_ready_state;
4401         }
4402 
4403         /*
4404          * MSI-X host index 0 is common for all adapter.
4405          * It is used for all MPT based Adapters.
4406          */
4407         instance->reply_post_host_index_addr[0] =
4408                 (u32 *)((u8 *)instance->reg_set +
4409                 MPI2_REPLY_POST_HOST_INDEX_OFFSET);
4410 
4411         /* Check if MSI-X is supported while in ready state */
4412         msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
4413                        0x4000000) >> 0x1a;
4414         if (msix_enable && !msix_disable) {
4415                 scratch_pad_2 = readl
4416                         (&instance->reg_set->outbound_scratch_pad_2);
4417                 /* Check max MSI-X vectors */
4418                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4419                     (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA)) {
4420                         instance->msix_vectors = (scratch_pad_2
4421                                 & MR_MAX_REPLY_QUEUES_OFFSET) + 1;
4422                         fw_msix_count = instance->msix_vectors;
4423                         if (msix_vectors)
4424                                 instance->msix_vectors =
4425                                         min(msix_vectors,
4426                                             instance->msix_vectors);
4427                 } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)
4428                         || (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4429                         /* Invader/Fury supports more than 8 MSI-X */
4430                         instance->msix_vectors = ((scratch_pad_2
4431                                 & MR_MAX_REPLY_QUEUES_EXT_OFFSET)
4432                                 >> MR_MAX_REPLY_QUEUES_EXT_OFFSET_SHIFT) + 1;
4433                         fw_msix_count = instance->msix_vectors;
4434                         /* Save 1-15 reply post index address to local memory
4435                          * Index 0 is already saved from reg offset
4436                          * MPI2_REPLY_POST_HOST_INDEX_OFFSET
4437                          */
4438                         for (loop = 1; loop < MR_MAX_MSIX_REG_ARRAY; loop++) {
4439                                 instance->reply_post_host_index_addr[loop] =
4440                                         (u32 *)((u8 *)instance->reg_set +
4441                                         MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET
4442                                         + (loop * 0x10));
4443                         }
4444                         if (msix_vectors)
4445                                 instance->msix_vectors = min(msix_vectors,
4446                                         instance->msix_vectors);
4447                 } else
4448                         instance->msix_vectors = 1;
4449                 /* Don't bother allocating more MSI-X vectors than cpus */
4450                 instance->msix_vectors = min(instance->msix_vectors,
4451                                              (unsigned int)num_online_cpus());
4452                 for (i = 0; i < instance->msix_vectors; i++)
4453                         instance->msixentry[i].entry = i;
4454                 i = pci_enable_msix_range(instance->pdev, instance->msixentry,
4455                                           1, instance->msix_vectors);
4456                 if (i > 0)
4457                         instance->msix_vectors = i;
4458                 else
4459                         instance->msix_vectors = 0;
4460 
4461                 dev_info(&instance->pdev->dev, "[scsi%d]: FW supports"
4462                         "<%d> MSIX vector,Online CPUs: <%d>,"
4463                         "Current MSIX <%d>\n", instance->host->host_no,
4464                         fw_msix_count, (unsigned int)num_online_cpus(),
4465                         instance->msix_vectors);
4466         }
4467 
4468         instance->ctrl_info = kzalloc(sizeof(struct megasas_ctrl_info),
4469                                 GFP_KERNEL);
4470         if (instance->ctrl_info == NULL)
4471                 goto fail_init_adapter;
4472 
4473         /*
4474          * Below are default value for legacy Firmware.
4475          * non-fusion based controllers
4476          */
4477         instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
4478         instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
4479         /* Get operational params, sge flags, send init cmd to controller */
4480         if (instance->instancet->init_adapter(instance))
4481                 goto fail_init_adapter;
4482 
4483         printk(KERN_ERR "megasas: INIT adapter done\n");
4484 
4485         /** for passthrough
4486         * the following function will get the PD LIST.
4487         */
4488 
4489         memset(instance->pd_list, 0 ,
4490                 (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
4491         if (megasas_get_pd_list(instance) < 0) {
4492                 printk(KERN_ERR "megasas: failed to get PD list\n");
4493                 goto fail_init_adapter;
4494         }
4495 
4496         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4497         if (megasas_ld_list_query(instance,
4498                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
4499                 megasas_get_ld_list(instance);
4500 
4501         /*
4502          * Compute the max allowed sectors per IO: The controller info has two
4503          * limits on max sectors. Driver should use the minimum of these two.
4504          *
4505          * 1 << stripe_sz_ops.min = max sectors per strip
4506          *
4507          * Note that older firmwares ( < FW ver 30) didn't report information
4508          * to calculate max_sectors_1. So the number ended up as zero always.
4509          */
4510         tmp_sectors = 0;
4511         ctrl_info = instance->ctrl_info;
4512 
4513         max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
4514                 le16_to_cpu(ctrl_info->max_strips_per_io);
4515         max_sectors_2 = le32_to_cpu(ctrl_info->max_request_size);
4516 
4517         tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
4518 
4519         /*Check whether controller is iMR or MR */
4520         if (ctrl_info->memory_size) {
4521                 instance->is_imr = 0;
4522                 dev_info(&instance->pdev->dev, "Controller type: MR,"
4523                         "Memory size is: %dMB\n",
4524                         le16_to_cpu(ctrl_info->memory_size));
4525         } else {
4526                 instance->is_imr = 1;
4527                 dev_info(&instance->pdev->dev,
4528                         "Controller type: iMR\n");
4529         }
4530         /* OnOffProperties are converted into CPU arch*/
4531         le32_to_cpus((u32 *)&ctrl_info->properties.OnOffProperties);
4532         instance->disableOnlineCtrlReset =
4533         ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
4534         /* adapterOperations2 are converted into CPU arch*/
4535         le32_to_cpus((u32 *)&ctrl_info->adapterOperations2);
4536         instance->mpio = ctrl_info->adapterOperations2.mpio;
4537         instance->UnevenSpanSupport =
4538                 ctrl_info->adapterOperations2.supportUnevenSpans;
4539         if (instance->UnevenSpanSupport) {
4540                 struct fusion_context *fusion = instance->ctrl_context;
4541 
4542                 dev_info(&instance->pdev->dev, "FW supports: "
4543                 "UnevenSpanSupport=%x\n", instance->UnevenSpanSupport);
4544                 if (MR_ValidateMapInfo(instance))
4545                         fusion->fast_path_io = 1;
4546                 else
4547                         fusion->fast_path_io = 0;
4548 
4549         }
4550         if (ctrl_info->host_interface.SRIOV) {
4551                 if (!ctrl_info->adapterOperations2.activePassive)
4552                         instance->PlasmaFW111 = 1;
4553 
4554                 if (!instance->PlasmaFW111)
4555                         instance->requestorId =
4556                                 ctrl_info->iov.requestorId;
4557                 else {
4558                         iovPtr = (struct IOV_111 *)((unsigned char *)ctrl_info + IOV_111_OFFSET);
4559                         instance->requestorId = iovPtr->requestorId;
4560                 }
4561                 dev_warn(&instance->pdev->dev, "I am VF "
4562                        "requestorId %d\n", instance->requestorId);
4563         }
4564 
4565         le32_to_cpus((u32 *)&ctrl_info->adapterOperations3);
4566         instance->crash_dump_fw_support =
4567                 ctrl_info->adapterOperations3.supportCrashDump;
4568         instance->crash_dump_drv_support =
4569                 (instance->crash_dump_fw_support &&
4570                 instance->crash_dump_buf);
4571         if (instance->crash_dump_drv_support) {
4572                 dev_info(&instance->pdev->dev, "Firmware Crash dump "
4573                         "feature is supported\n");
4574                 megasas_set_crash_dump_params(instance,
4575                         MR_CRASH_BUF_TURN_OFF);
4576 
4577         } else {
4578                 if (instance->crash_dump_buf)
4579                         pci_free_consistent(instance->pdev,
4580                                 CRASH_DMA_BUF_SIZE,
4581                                 instance->crash_dump_buf,
4582                                 instance->crash_dump_h);
4583                 instance->crash_dump_buf = NULL;
4584         }
4585         instance->max_sectors_per_req = instance->max_num_sge *
4586                                                 PAGE_SIZE / 512;
4587         if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
4588                 instance->max_sectors_per_req = tmp_sectors;
4589 
4590         kfree(ctrl_info);
4591 
4592         /* Check for valid throttlequeuedepth module parameter */
4593         if (instance->is_imr) {
4594                 if (throttlequeuedepth > (instance->max_fw_cmds -
4595                                           MEGASAS_SKINNY_INT_CMDS))
4596                         instance->throttlequeuedepth =
4597                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4598                 else
4599                         instance->throttlequeuedepth = throttlequeuedepth;
4600         } else {
4601                 if (throttlequeuedepth > (instance->max_fw_cmds -
4602                                           MEGASAS_INT_CMDS))
4603                         instance->throttlequeuedepth =
4604                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4605                 else
4606                         instance->throttlequeuedepth = throttlequeuedepth;
4607         }
4608 
4609         /*
4610         * Setup tasklet for cmd completion
4611         */
4612 
4613         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4614                 (unsigned long)instance);
4615 
4616         /* Launch SR-IOV heartbeat timer */
4617         if (instance->requestorId) {
4618                 if (!megasas_sriov_start_heartbeat(instance, 1))
4619                         megasas_start_timer(instance,
4620                                             &instance->sriov_heartbeat_timer,
4621                                             megasas_sriov_heartbeat_handler,
4622                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
4623                 else
4624                         instance->skip_heartbeat_timer_del = 1;
4625         }
4626 
4627         return 0;
4628 
4629 fail_init_adapter:
4630 fail_ready_state:
4631         kfree(instance->ctrl_info);
4632         instance->ctrl_info = NULL;
4633         iounmap(instance->reg_set);
4634 
4635       fail_ioremap:
4636         pci_release_selected_regions(instance->pdev, instance->bar);
4637 
4638         return -EINVAL;
4639 }
4640 
4641 /**
4642  * megasas_release_mfi -        Reverses the FW initialization
4643  * @intance:                    Adapter soft state
4644  */
4645 static void megasas_release_mfi(struct megasas_instance *instance)
4646 {
4647         u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
4648 
4649         if (instance->reply_queue)
4650                 pci_free_consistent(instance->pdev, reply_q_sz,
4651                             instance->reply_queue, instance->reply_queue_h);
4652 
4653         megasas_free_cmds(instance);
4654 
4655         iounmap(instance->reg_set);
4656 
4657         pci_release_selected_regions(instance->pdev, instance->bar);
4658 }
4659 
4660 /**
4661  * megasas_get_seq_num -        Gets latest event sequence numbers
4662  * @instance:                   Adapter soft state
4663  * @eli:                        FW event log sequence numbers information
4664  *
4665  * FW maintains a log of all events in a non-volatile area. Upper layers would
4666  * usually find out the latest sequence number of the events, the seq number at
4667  * the boot etc. They would "read" all the events below the latest seq number
4668  * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
4669  * number), they would subsribe to AEN (asynchronous event notification) and
4670  * wait for the events to happen.
4671  */
4672 static int
4673 megasas_get_seq_num(struct megasas_instance *instance,
4674                     struct megasas_evt_log_info *eli)
4675 {
4676         struct megasas_cmd *cmd;
4677         struct megasas_dcmd_frame *dcmd;
4678         struct megasas_evt_log_info *el_info;
4679         dma_addr_t el_info_h = 0;
4680 
4681         cmd = megasas_get_cmd(instance);
4682 
4683         if (!cmd) {
4684                 return -ENOMEM;
4685         }
4686 
4687         dcmd = &cmd->frame->dcmd;
4688         el_info = pci_alloc_consistent(instance->pdev,
4689                                        sizeof(struct megasas_evt_log_info),
4690                                        &el_info_h);
4691 
4692         if (!el_info) {
4693                 megasas_return_cmd(instance, cmd);
4694                 return -ENOMEM;
4695         }
4696 
4697         memset(el_info, 0, sizeof(*el_info));
4698         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4699 
4700         dcmd->cmd = MFI_CMD_DCMD;
4701         dcmd->cmd_status = 0x0;
4702         dcmd->sge_count = 1;
4703         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4704         dcmd->timeout = 0;
4705         dcmd->pad_0 = 0;
4706         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4707         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_GET_INFO);
4708         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(el_info_h);
4709         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4710 
4711         if (megasas_issue_blocked_cmd(instance, cmd, 30))
4712                 dev_err(&instance->pdev->dev, "Command timedout"
4713                         "from %s\n", __func__);
4714         else {
4715                 /*
4716                  * Copy the data back into callers buffer
4717                  */
4718                 eli->newest_seq_num = le32_to_cpu(el_info->newest_seq_num);
4719                 eli->oldest_seq_num = le32_to_cpu(el_info->oldest_seq_num);
4720                 eli->clear_seq_num = le32_to_cpu(el_info->clear_seq_num);
4721                 eli->shutdown_seq_num = le32_to_cpu(el_info->shutdown_seq_num);
4722                 eli->boot_seq_num = le32_to_cpu(el_info->boot_seq_num);
4723         }
4724 
4725         pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
4726                             el_info, el_info_h);
4727 
4728         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4729                 megasas_return_mfi_mpt_pthr(instance, cmd,
4730                         cmd->mpt_pthr_cmd_blocked);
4731         else
4732                 megasas_return_cmd(instance, cmd);
4733 
4734         return 0;
4735 }
4736 
4737 /**
4738  * megasas_register_aen -       Registers for asynchronous event notification
4739  * @instance:                   Adapter soft state
4740  * @seq_num:                    The starting sequence number
4741  * @class_locale:               Class of the event
4742  *
4743  * This function subscribes for AEN for events beyond the @seq_num. It requests
4744  * to be notified if and only if the event is of type @class_locale
4745  */
4746 static int
4747 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
4748                      u32 class_locale_word)
4749 {
4750         int ret_val;
4751         struct megasas_cmd *cmd;
4752         struct megasas_dcmd_frame *dcmd;
4753         union megasas_evt_class_locale curr_aen;
4754         union megasas_evt_class_locale prev_aen;
4755 
4756         /*
4757          * If there an AEN pending already (aen_cmd), check if the
4758          * class_locale of that pending AEN is inclusive of the new
4759          * AEN request we currently have. If it is, then we don't have
4760          * to do anything. In other words, whichever events the current
4761          * AEN request is subscribing to, have already been subscribed
4762          * to.
4763          *
4764          * If the old_cmd is _not_ inclusive, then we have to abort
4765          * that command, form a class_locale that is superset of both
4766          * old and current and re-issue to the FW
4767          */
4768 
4769         curr_aen.word = class_locale_word;
4770 
4771         if (instance->aen_cmd) {
4772 
4773                 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
4774                 prev_aen.members.locale = le16_to_cpu(prev_aen.members.locale);
4775 
4776                 /*
4777                  * A class whose enum value is smaller is inclusive of all
4778                  * higher values. If a PROGRESS (= -1) was previously
4779                  * registered, then a new registration requests for higher
4780                  * classes need not be sent to FW. They are automatically
4781                  * included.
4782                  *
4783                  * Locale numbers don't have such hierarchy. They are bitmap
4784                  * values
4785                  */
4786                 if ((prev_aen.members.class <= curr_aen.members.class) &&
4787                     !((prev_aen.members.locale & curr_aen.members.locale) ^
4788                       curr_aen.members.locale)) {
4789                         /*
4790                          * Previously issued event registration includes
4791                          * current request. Nothing to do.
4792                          */
4793                         return 0;
4794                 } else {
4795                         curr_aen.members.locale |= prev_aen.members.locale;
4796 
4797                         if (prev_aen.members.class < curr_aen.members.class)
4798                                 curr_aen.members.class = prev_aen.members.class;
4799 
4800                         instance->aen_cmd->abort_aen = 1;
4801                         ret_val = megasas_issue_blocked_abort_cmd(instance,
4802                                                                   instance->
4803                                                                   aen_cmd, 30);
4804 
4805                         if (ret_val) {
4806                                 printk(KERN_DEBUG "megasas: Failed to abort "
4807                                        "previous AEN command\n");
4808                                 return ret_val;
4809                         }
4810                 }
4811         }
4812 
4813         cmd = megasas_get_cmd(instance);
4814 
4815         if (!cmd)
4816                 return -ENOMEM;
4817 
4818         dcmd = &cmd->frame->dcmd;
4819 
4820         memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
4821 
4822         /*
4823          * Prepare DCMD for aen registration
4824          */
4825         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4826 
4827         dcmd->cmd = MFI_CMD_DCMD;
4828         dcmd->cmd_status = 0x0;
4829         dcmd->sge_count = 1;
4830         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4831         dcmd->timeout = 0;
4832         dcmd->pad_0 = 0;
4833         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_detail));
4834         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_WAIT);
4835         dcmd->mbox.w[0] = cpu_to_le32(seq_num);
4836         instance->last_seq_num = seq_num;
4837         dcmd->mbox.w[1] = cpu_to_le32(curr_aen.word);
4838         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->evt_detail_h);
4839         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_detail));
4840 
4841         if (instance->aen_cmd != NULL) {
4842                 megasas_return_cmd(instance, cmd);
4843                 return 0;
4844         }
4845 
4846         /*
4847          * Store reference to the cmd used to register for AEN. When an
4848          * application wants us to register for AEN, we have to abort this
4849          * cmd and re-register with a new EVENT LOCALE supplied by that app
4850          */
4851         instance->aen_cmd = cmd;
4852 
4853         /*
4854          * Issue the aen registration frame
4855          */
4856         instance->instancet->issue_dcmd(instance, cmd);
4857 
4858         return 0;
4859 }
4860 
4861 /**
4862  * megasas_start_aen -  Subscribes to AEN during driver load time
4863  * @instance:           Adapter soft state
4864  */
4865 static int megasas_start_aen(struct megasas_instance *instance)
4866 {
4867         struct megasas_evt_log_info eli;
4868         union megasas_evt_class_locale class_locale;
4869 
4870         /*
4871          * Get the latest sequence number from FW
4872          */
4873         memset(&eli, 0, sizeof(eli));
4874 
4875         if (megasas_get_seq_num(instance, &eli))
4876                 return -1;
4877 
4878         /*
4879          * Register AEN with FW for latest sequence number plus 1
4880          */
4881         class_locale.members.reserved = 0;
4882         class_locale.members.locale = MR_EVT_LOCALE_ALL;
4883         class_locale.members.class = MR_EVT_CLASS_DEBUG;
4884 
4885         return megasas_register_aen(instance,
4886                         eli.newest_seq_num + 1,
4887                         class_locale.word);
4888 }
4889 
4890 /**
4891  * megasas_io_attach -  Attaches this driver to SCSI mid-layer
4892  * @instance:           Adapter soft state
4893  */
4894 static int megasas_io_attach(struct megasas_instance *instance)
4895 {
4896         struct Scsi_Host *host = instance->host;
4897 
4898         /*
4899          * Export parameters required by SCSI mid-layer
4900          */
4901         host->irq = instance->pdev->irq;
4902         host->unique_id = instance->unique_id;
4903         if (instance->is_imr) {
4904                 host->can_queue =
4905                         instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
4906         } else
4907                 host->can_queue =
4908                         instance->max_fw_cmds - MEGASAS_INT_CMDS;
4909         host->this_id = instance->init_id;
4910         host->sg_tablesize = instance->max_num_sge;
4911 
4912         if (instance->fw_support_ieee)
4913                 instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
4914 
4915         /*
4916          * Check if the module parameter value for max_sectors can be used
4917          */
4918         if (max_sectors && max_sectors < instance->max_sectors_per_req)
4919                 instance->max_sectors_per_req = max_sectors;
4920         else {
4921                 if (max_sectors) {
4922                         if (((instance->pdev->device ==
4923                                 PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
4924                                 (instance->pdev->device ==
4925                                 PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
4926                                 (max_sectors <= MEGASAS_MAX_SECTORS)) {
4927                                 instance->max_sectors_per_req = max_sectors;
4928                         } else {
4929                         printk(KERN_INFO "megasas: max_sectors should be > 0"
4930                                 "and <= %d (or < 1MB for GEN2 controller)\n",
4931                                 instance->max_sectors_per_req);
4932                         }
4933                 }
4934         }
4935 
4936         host->max_sectors = instance->max_sectors_per_req;
4937         host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
4938         host->max_channel = MEGASAS_MAX_CHANNELS - 1;
4939         host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
4940         host->max_lun = MEGASAS_MAX_LUN;
4941         host->max_cmd_len = 16;
4942 
4943         /* Fusion only supports host reset */
4944         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4945             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
4946             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
4947             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4948                 host->hostt->eh_device_reset_handler = NULL;
4949                 host->hostt->eh_bus_reset_handler = NULL;
4950         }
4951 
4952         /*
4953          * Notify the mid-layer about the new controller
4954          */
4955         if (scsi_add_host(host, &instance->pdev->dev)) {
4956                 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
4957                 return -ENODEV;
4958         }
4959 
4960         /*
4961          * Trigger SCSI to scan our drives
4962          */
4963         scsi_scan_host(host);
4964         return 0;
4965 }
4966 
4967 static int
4968 megasas_set_dma_mask(struct pci_dev *pdev)
4969 {
4970         /*
4971          * All our contollers are capable of performing 64-bit DMA
4972          */
4973         if (IS_DMA64) {
4974                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
4975 
4976                         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4977                                 goto fail_set_dma_mask;
4978                 }
4979         } else {
4980                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4981                         goto fail_set_dma_mask;
4982         }
4983         /*
4984          * Ensure that all data structures are allocated in 32-bit
4985          * memory.
4986          */
4987         if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
4988                 /* Try 32bit DMA mask and 32 bit Consistent dma mask */
4989                 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
4990                         && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
4991                         dev_info(&pdev->dev, "set 32bit DMA mask"
4992                                 "and 32 bit consistent mask\n");
4993                 else
4994                         goto fail_set_dma_mask;
4995         }
4996 
4997         return 0;
4998 
4999 fail_set_dma_mask:
5000         return 1;
5001 }
5002 
5003 /**
5004  * megasas_probe_one -  PCI hotplug entry point
5005  * @pdev:               PCI device structure
5006  * @id:                 PCI ids of supported hotplugged adapter
5007  */
5008 static int megasas_probe_one(struct pci_dev *pdev,
5009                              const struct pci_device_id *id)
5010 {
5011         int rval, pos, i, j, cpu;
5012         struct Scsi_Host *host;
5013         struct megasas_instance *instance;
5014         u16 control = 0;
5015         struct fusion_context *fusion = NULL;
5016 
5017         /* Reset MSI-X in the kdump kernel */
5018         if (reset_devices) {
5019                 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
5020                 if (pos) {
5021                         pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS,
5022                                              &control);
5023                         if (control & PCI_MSIX_FLAGS_ENABLE) {
5024                                 dev_info(&pdev->dev, "resetting MSI-X\n");
5025                                 pci_write_config_word(pdev,
5026                                                       pos + PCI_MSIX_FLAGS,
5027                                                       control &
5028                                                       ~PCI_MSIX_FLAGS_ENABLE);
5029                         }
5030                 }
5031         }
5032 
5033         /*
5034          * Announce PCI information
5035          */
5036         printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
5037                pdev->vendor, pdev->device, pdev->subsystem_vendor,
5038                pdev->subsystem_device);
5039 
5040         printk("bus %d:slot %d:func %d\n",
5041                pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
5042 
5043         /*
5044          * PCI prepping: enable device set bus mastering and dma mask
5045          */
5046         rval = pci_enable_device_mem(pdev);
5047 
5048         if (rval) {
5049                 return rval;
5050         }
5051 
5052         pci_set_master(pdev);
5053 
5054         if (megasas_set_dma_mask(pdev))
5055                 goto fail_set_dma_mask;
5056 
5057         host = scsi_host_alloc(&megasas_template,
5058                                sizeof(struct megasas_instance));
5059 
5060         if (!host) {
5061                 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
5062                 goto fail_alloc_instance;
5063         }
5064 
5065         instance = (struct megasas_instance *)host->hostdata;
5066         memset(instance, 0, sizeof(*instance));
5067         atomic_set( &instance->fw_reset_no_pci_access, 0 );
5068         instance->pdev = pdev;
5069 
5070         switch (instance->pdev->device) {
5071         case PCI_DEVICE_ID_LSI_FUSION:
5072         case PCI_DEVICE_ID_LSI_PLASMA:
5073         case PCI_DEVICE_ID_LSI_INVADER:
5074         case PCI_DEVICE_ID_LSI_FURY:
5075         {
5076                 instance->ctrl_context_pages =
5077                         get_order(sizeof(struct fusion_context));
5078                 instance->ctrl_context = (void *)__get_free_pages(GFP_KERNEL,
5079                                 instance->ctrl_context_pages);
5080                 if (!instance->ctrl_context) {
5081                         printk(KERN_DEBUG "megasas: Failed to allocate "
5082                                "memory for Fusion context info\n");
5083                         goto fail_alloc_dma_buf;
5084                 }
5085                 fusion = instance->ctrl_context;
5086                 INIT_LIST_HEAD(&fusion->cmd_pool);
5087                 spin_lock_init(&fusion->mpt_pool_lock);
5088                 memset(fusion->load_balance_info, 0,
5089                         sizeof(struct LD_LOAD_BALANCE_INFO) * MAX_LOGICAL_DRIVES_EXT);
5090         }
5091         break;
5092         default: /* For all other supported controllers */
5093 
5094                 instance->producer =
5095                         pci_alloc_consistent(pdev, sizeof(u32),
5096                                              &instance->producer_h);
5097                 instance->consumer =
5098                         pci_alloc_consistent(pdev, sizeof(u32),
5099                                              &instance->consumer_h);
5100 
5101                 if (!instance->producer || !instance->consumer) {
5102                         printk(KERN_DEBUG "megasas: Failed to allocate"
5103                                "memory for producer, consumer\n");
5104                         goto fail_alloc_dma_buf;
5105                 }
5106 
5107                 *instance->producer = 0;
5108                 *instance->consumer = 0;
5109                 break;
5110         }
5111 
5112         /* Crash dump feature related initialisation*/
5113         instance->drv_buf_index = 0;
5114         instance->drv_buf_alloc = 0;
5115         instance->crash_dump_fw_support = 0;
5116         instance->crash_dump_app_support = 0;
5117         instance->fw_crash_state = UNAVAILABLE;
5118         spin_lock_init(&instance->crashdump_lock);
5119         instance->crash_dump_buf = NULL;
5120 
5121         if (!reset_devices)
5122                 instance->crash_dump_buf = pci_alloc_consistent(pdev,
5123                                                 CRASH_DMA_BUF_SIZE,
5124                                                 &instance->crash_dump_h);
5125         if (!instance->crash_dump_buf)
5126                 dev_err(&instance->pdev->dev, "Can't allocate Firmware "
5127                         "crash dump DMA buffer\n");
5128 
5129         megasas_poll_wait_aen = 0;
5130         instance->flag_ieee = 0;
5131         instance->ev = NULL;
5132         instance->issuepend_done = 1;
5133         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
5134         instance->is_imr = 0;
5135 
5136         instance->evt_detail = pci_alloc_consistent(pdev,
5137                                                     sizeof(struct
5138                                                            megasas_evt_detail),
5139                                                     &instance->evt_detail_h);
5140 
5141         if (!instance->evt_detail) {
5142                 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
5143                        "event detail structure\n");
5144                 goto fail_alloc_dma_buf;
5145         }
5146 
5147         /*
5148          * Initialize locks and queues
5149          */
5150         INIT_LIST_HEAD(&instance->cmd_pool);
5151         INIT_LIST_HEAD(&instance->internal_reset_pending_q);
5152 
5153         atomic_set(&instance->fw_outstanding,0);
5154 
5155         init_waitqueue_head(&instance->int_cmd_wait_q);
5156         init_waitqueue_head(&instance->abort_cmd_wait_q);
5157 
5158         spin_lock_init(&instance->mfi_pool_lock);
5159         spin_lock_init(&instance->hba_lock);
5160         spin_lock_init(&instance->completion_lock);
5161 
5162         mutex_init(&instance->aen_mutex);
5163         mutex_init(&instance->reset_mutex);
5164 
5165         /*
5166          * Initialize PCI related and misc parameters
5167          */
5168         instance->host = host;
5169         instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
5170         instance->init_id = MEGASAS_DEFAULT_INIT_ID;
5171         instance->ctrl_info = NULL;
5172 
5173         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
5174                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
5175                 instance->flag_ieee = 1;
5176                 sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
5177         } else
5178                 sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
5179 
5180         megasas_dbg_lvl = 0;
5181         instance->flag = 0;
5182         instance->unload = 1;
5183         instance->last_time = 0;
5184         instance->disableOnlineCtrlReset = 1;
5185         instance->UnevenSpanSupport = 0;
5186 
5187         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5188             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5189             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5190             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
5191                 INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
5192                 INIT_WORK(&instance->crash_init, megasas_fusion_crash_dump_wq);
5193         } else
5194                 INIT_WORK(&instance->work_init, process_fw_state_change_wq);
5195 
5196         /*
5197          * Initialize MFI Firmware
5198          */
5199         if (megasas_init_fw(instance))
5200                 goto fail_init_mfi;
5201 
5202         if (instance->requestorId) {
5203                 if (instance->PlasmaFW111) {
5204                         instance->vf_affiliation_111 =
5205                                 pci_alloc_consistent(pdev, sizeof(struct MR_LD_VF_AFFILIATION_111),
5206                                                      &instance->vf_affiliation_111_h);
5207                         if (!instance->vf_affiliation_111)
5208                                 printk(KERN_WARNING "megasas: Can't allocate "
5209                                        "memory for VF affiliation buffer\n");
5210                 } else {
5211                         instance->vf_affiliation =
5212                                 pci_alloc_consistent(pdev,
5213                                                      (MAX_LOGICAL_DRIVES + 1) *
5214                                                      sizeof(struct MR_LD_VF_AFFILIATION),
5215                                                      &instance->vf_affiliation_h);
5216                         if (!instance->vf_affiliation)
5217                                 printk(KERN_WARNING "megasas: Can't allocate "
5218                                        "memory for VF affiliation buffer\n");
5219                 }
5220         }
5221 
5222 retry_irq_register:
5223         /*
5224          * Register IRQ
5225          */
5226         if (instance->msix_vectors) {
5227                 cpu = cpumask_first(cpu_online_mask);
5228                 for (i = 0; i < instance->msix_vectors; i++) {
5229                         instance->irq_context[i].instance = instance;
5230                         instance->irq_context[i].MSIxIndex = i;
5231                         if (request_irq(instance->msixentry[i].vector,
5232                                         instance->instancet->service_isr, 0,
5233                                         "megasas",
5234                                         &instance->irq_context[i])) {
5235                                 printk(KERN_DEBUG "megasas: Failed to "
5236                                        "register IRQ for vector %d.\n", i);
5237                                 for (j = 0; j < i; j++) {
5238                                         if (smp_affinity_enable)
5239                                                 irq_set_affinity_hint(
5240                                                         instance->msixentry[j].vector, NULL);
5241                                         free_irq(
5242                                                 instance->msixentry[j].vector,
5243                                                 &instance->irq_context[j]);
5244                                 }
5245                                 /* Retry irq register for IO_APIC */
5246                                 instance->msix_vectors = 0;
5247                                 goto retry_irq_register;
5248                         }
5249                         if (smp_affinity_enable) {
5250                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5251                                         get_cpu_mask(cpu)))
5252                                         dev_err(&instance->pdev->dev,
5253                                                 "Error setting affinity hint "
5254                                                 "for cpu %d\n", cpu);
5255                                 cpu = cpumask_next(cpu, cpu_online_mask);
5256                         }
5257                 }
5258         } else {
5259                 instance->irq_context[0].instance = instance;
5260                 instance->irq_context[0].MSIxIndex = 0;
5261                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5262                                 IRQF_SHARED, "megasas",
5263                                 &instance->irq_context[0])) {
5264                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5265                         goto fail_irq;
5266                 }
5267         }
5268 
5269         instance->instancet->enable_intr(instance);
5270 
5271         /*
5272          * Store instance in PCI softstate
5273          */
5274         pci_set_drvdata(pdev, instance);
5275 
5276         /*
5277          * Add this controller to megasas_mgmt_info structure so that it
5278          * can be exported to management applications
5279          */
5280         megasas_mgmt_info.count++;
5281         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
5282         megasas_mgmt_info.max_index++;
5283 
5284         /*
5285          * Register with SCSI mid-layer
5286          */
5287         if (megasas_io_attach(instance))
5288                 goto fail_io_attach;
5289 
5290         instance->unload = 0;
5291 
5292         /*
5293          * Initiate AEN (Asynchronous Event Notification)
5294          */
5295         if (megasas_start_aen(instance)) {
5296                 printk(KERN_DEBUG "megasas: start aen failed\n");
5297                 goto fail_start_aen;
5298         }
5299 
5300         /* Get current SR-IOV LD/VF affiliation */
5301         if (instance->requestorId)
5302                 megasas_get_ld_vf_affiliation(instance, 1);
5303 
5304         return 0;
5305 
5306       fail_start_aen:
5307       fail_io_attach:
5308         megasas_mgmt_info.count--;
5309         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
5310         megasas_mgmt_info.max_index--;
5311 
5312         instance->instancet->disable_intr(instance);
5313         if (instance->msix_vectors)
5314                 for (i = 0; i < instance->msix_vectors; i++) {
5315                         if (smp_affinity_enable)
5316                                 irq_set_affinity_hint(
5317                                         instance->msixentry[i].vector, NULL);
5318                         free_irq(instance->msixentry[i].vector,
5319                                  &instance->irq_context[i]);
5320                 }
5321         else
5322                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5323 fail_irq:
5324         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5325             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5326             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5327             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
5328                 megasas_release_fusion(instance);
5329         else
5330                 megasas_release_mfi(instance);
5331       fail_init_mfi:
5332         if (instance->msix_vectors)
5333                 pci_disable_msix(instance->pdev);
5334       fail_alloc_dma_buf:
5335         if (instance->evt_detail)
5336                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5337                                     instance->evt_detail,
5338                                     instance->evt_detail_h);
5339 
5340         if (instance->producer)
5341                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5342                                     instance->producer_h);
5343         if (instance->consumer)
5344                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5345                                     instance->consumer_h);
5346         scsi_host_put(host);
5347 
5348       fail_alloc_instance:
5349       fail_set_dma_mask:
5350         pci_disable_device(pdev);
5351 
5352         return -ENODEV;
5353 }
5354 
5355 /**
5356  * megasas_flush_cache -        Requests FW to flush all its caches
5357  * @instance:                   Adapter soft state
5358  */
5359 static void megasas_flush_cache(struct megasas_instance *instance)
5360 {
5361         struct megasas_cmd *cmd;
5362         struct megasas_dcmd_frame *dcmd;
5363 
5364         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5365                 return;
5366 
5367         cmd = megasas_get_cmd(instance);
5368 
5369         if (!cmd)
5370                 return;
5371 
5372         dcmd = &cmd->frame->dcmd;
5373 
5374         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5375 
5376         dcmd->cmd = MFI_CMD_DCMD;
5377         dcmd->cmd_status = 0x0;
5378         dcmd->sge_count = 0;
5379         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5380         dcmd->timeout = 0;
5381         dcmd->pad_0 = 0;
5382         dcmd->data_xfer_len = 0;
5383         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_CACHE_FLUSH);
5384         dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
5385 
5386         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5387                 dev_err(&instance->pdev->dev, "Command timedout"
5388                         " from %s\n", __func__);
5389 
5390         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5391                 megasas_return_mfi_mpt_pthr(instance, cmd,
5392                         cmd->mpt_pthr_cmd_blocked);
5393         else
5394                 megasas_return_cmd(instance, cmd);
5395 
5396         return;
5397 }
5398 
5399 /**
5400  * megasas_shutdown_controller -        Instructs FW to shutdown the controller
5401  * @instance:                           Adapter soft state
5402  * @opcode:                             Shutdown/Hibernate
5403  */
5404 static void megasas_shutdown_controller(struct megasas_instance *instance,
5405                                         u32 opcode)
5406 {
5407         struct megasas_cmd *cmd;
5408         struct megasas_dcmd_frame *dcmd;
5409 
5410         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5411                 return;
5412 
5413         cmd = megasas_get_cmd(instance);
5414 
5415         if (!cmd)
5416                 return;
5417 
5418         if (instance->aen_cmd)
5419                 megasas_issue_blocked_abort_cmd(instance,
5420                         instance->aen_cmd, 30);
5421         if (instance->map_update_cmd)
5422                 megasas_issue_blocked_abort_cmd(instance,
5423                         instance->map_update_cmd, 30);
5424         dcmd = &cmd->frame->dcmd;
5425 
5426         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5427 
5428         dcmd->cmd = MFI_CMD_DCMD;
5429         dcmd->cmd_status = 0x0;
5430         dcmd->sge_count = 0;
5431         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5432         dcmd->timeout = 0;
5433         dcmd->pad_0 = 0;
5434         dcmd->data_xfer_len = 0;
5435         dcmd->opcode = cpu_to_le32(opcode);
5436 
5437         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5438                 dev_err(&instance->pdev->dev, "Command timedout"
5439                         "from %s\n", __func__);
5440 
5441         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5442                 megasas_return_mfi_mpt_pthr(instance, cmd,
5443                         cmd->mpt_pthr_cmd_blocked);
5444         else
5445                 megasas_return_cmd(instance, cmd);
5446 
5447         return;
5448 }
5449 
5450 #ifdef CONFIG_PM
5451 /**
5452  * megasas_suspend -    driver suspend entry point
5453  * @pdev:               PCI device structure
5454  * @state:              PCI power state to suspend routine
5455  */
5456 static int
5457 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
5458 {
5459         struct Scsi_Host *host;
5460         struct megasas_instance *instance;
5461         int i;
5462 
5463         instance = pci_get_drvdata(pdev);
5464         host = instance->host;
5465         instance->unload = 1;
5466 
5467         /* Shutdown SR-IOV heartbeat timer */
5468         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5469                 del_timer_sync(&instance->sriov_heartbeat_timer);
5470 
5471         megasas_flush_cache(instance);
5472         megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
5473 
5474         /* cancel the delayed work if this work still in queue */
5475         if (instance->ev != NULL) {
5476                 struct megasas_aen_event *ev = instance->ev;
5477                 cancel_delayed_work_sync(&ev->hotplug_work);
5478                 instance->ev = NULL;
5479         }
5480 
5481         tasklet_kill(&instance->isr_tasklet);
5482 
5483         pci_set_drvdata(instance->pdev, instance);
5484         instance->instancet->disable_intr(instance);
5485 
5486         if (instance->msix_vectors)
5487                 for (i = 0; i < instance->msix_vectors; i++) {
5488                         if (smp_affinity_enable)
5489                                 irq_set_affinity_hint(
5490                                         instance->msixentry[i].vector, NULL);
5491                         free_irq(instance->msixentry[i].vector,
5492                                  &instance->irq_context[i]);
5493                 }
5494         else
5495                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5496         if (instance->msix_vectors)
5497                 pci_disable_msix(instance->pdev);
5498 
5499         pci_save_state(pdev);
5500         pci_disable_device(pdev);
5501 
5502         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5503 
5504         return 0;
5505 }
5506 
5507 /**
5508  * megasas_resume-      driver resume entry point
5509  * @pdev:               PCI device structure
5510  */
5511 static int
5512 megasas_resume(struct pci_dev *pdev)
5513 {
5514         int rval, i, j, cpu;
5515         struct Scsi_Host *host;
5516         struct megasas_instance *instance;
5517 
5518         instance = pci_get_drvdata(pdev);
5519         host = instance->host;
5520         pci_set_power_state(pdev, PCI_D0);
5521         pci_enable_wake(pdev, PCI_D0, 0);
5522         pci_restore_state(pdev);
5523 
5524         /*
5525          * PCI prepping: enable device set bus mastering and dma mask
5526          */
5527         rval = pci_enable_device_mem(pdev);
5528 
5529         if (rval) {
5530                 printk(KERN_ERR "megasas: Enable device failed\n");
5531                 return rval;
5532         }
5533 
5534         pci_set_master(pdev);
5535 
5536         if (megasas_set_dma_mask(pdev))
5537                 goto fail_set_dma_mask;
5538 
5539         /*
5540          * Initialize MFI Firmware
5541          */
5542 
5543         atomic_set(&instance->fw_outstanding, 0);
5544 
5545         /*
5546          * We expect the FW state to be READY
5547          */
5548         if (megasas_transition_to_ready(instance, 0))
5549                 goto fail_ready_state;
5550 
5551         /* Now re-enable MSI-X */
5552         if (instance->msix_vectors &&
5553             pci_enable_msix_exact(instance->pdev, instance->msixentry,
5554                                   instance->msix_vectors))
5555                 goto fail_reenable_msix;
5556 
5557         switch (instance->pdev->device) {
5558         case PCI_DEVICE_ID_LSI_FUSION:
5559         case PCI_DEVICE_ID_LSI_PLASMA:
5560         case PCI_DEVICE_ID_LSI_INVADER:
5561         case PCI_DEVICE_ID_LSI_FURY:
5562         {
5563                 megasas_reset_reply_desc(instance);
5564                 if (megasas_ioc_init_fusion(instance)) {
5565                         megasas_free_cmds(instance);
5566                         megasas_free_cmds_fusion(instance);
5567                         goto fail_init_mfi;
5568                 }
5569                 if (!megasas_get_map_info(instance))
5570                         megasas_sync_map_info(instance);
5571         }
5572         break;
5573         default:
5574                 *instance->producer = 0;
5575                 *instance->consumer = 0;
5576                 if (megasas_issue_init_mfi(instance))
5577                         goto fail_init_mfi;
5578                 break;
5579         }
5580 
5581         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
5582                      (unsigned long)instance);
5583 
5584         /*
5585          * Register IRQ
5586          */
5587         if (instance->msix_vectors) {
5588                 cpu = cpumask_first(cpu_online_mask);
5589                 for (i = 0 ; i < instance->msix_vectors; i++) {
5590                         instance->irq_context[i].instance = instance;
5591                         instance->irq_context[i].MSIxIndex = i;
5592                         if (request_irq(instance->msixentry[i].vector,
5593                                         instance->instancet->service_isr, 0,
5594                                         "megasas",
5595                                         &instance->irq_context[i])) {
5596                                 printk(KERN_DEBUG "megasas: Failed to "
5597                                        "register IRQ for vector %d.\n", i);
5598                                 for (j = 0; j < i; j++) {
5599                                         if (smp_affinity_enable)
5600                                                 irq_set_affinity_hint(
5601                                                         instance->msixentry[j].vector, NULL);
5602                                         free_irq(
5603                                                 instance->msixentry[j].vector,
5604                                                 &instance->irq_context[j]);
5605                                 }
5606                                 goto fail_irq;
5607                         }
5608 
5609                         if (smp_affinity_enable) {
5610                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5611                                         get_cpu_mask(cpu)))
5612                                         dev_err(&instance->pdev->dev, "Error "
5613                                                 "setting affinity hint for cpu "
5614                                                 "%d\n", cpu);
5615                                 cpu = cpumask_next(cpu, cpu_online_mask);
5616                         }
5617                 }
5618         } else {
5619                 instance->irq_context[0].instance = instance;
5620                 instance->irq_context[0].MSIxIndex = 0;
5621                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5622                                 IRQF_SHARED, "megasas",
5623                                 &instance->irq_context[0])) {
5624                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5625                         goto fail_irq;
5626                 }
5627         }
5628 
5629         /* Re-launch SR-IOV heartbeat timer */
5630         if (instance->requestorId) {
5631                 if (!megasas_sriov_start_heartbeat(instance, 0))
5632                         megasas_start_timer(instance,
5633                                             &instance->sriov_heartbeat_timer,
5634                                             megasas_sriov_heartbeat_handler,
5635                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
5636                 else
5637                         instance->skip_heartbeat_timer_del = 1;
5638         }
5639 
5640         instance->instancet->enable_intr(instance);
5641         instance->unload = 0;
5642 
5643         /*
5644          * Initiate AEN (Asynchronous Event Notification)
5645          */
5646         if (megasas_start_aen(instance))
5647                 printk(KERN_ERR "megasas: Start AEN failed\n");
5648 
5649         return 0;
5650 
5651 fail_irq:
5652 fail_init_mfi:
5653         if (instance->evt_detail)
5654                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5655                                 instance->evt_detail,
5656                                 instance->evt_detail_h);
5657 
5658         if (instance->producer)
5659                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5660                                 instance->producer_h);
5661         if (instance->consumer)
5662                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5663                                 instance->consumer_h);
5664         scsi_host_put(host);
5665 
5666 fail_set_dma_mask:
5667 fail_ready_state:
5668 fail_reenable_msix:
5669 
5670         pci_disable_device(pdev);
5671 
5672         return -ENODEV;
5673 }
5674 #else
5675 #define megasas_suspend NULL
5676 #define megasas_resume  NULL
5677 #endif
5678 
5679 /**
5680  * megasas_detach_one - PCI hot"un"plug entry point
5681  * @pdev:               PCI device structure
5682  */
5683 static void megasas_detach_one(struct pci_dev *pdev)
5684 {
5685         int i;
5686         struct Scsi_Host *host;
5687         struct megasas_instance *instance;
5688         struct fusion_context *fusion;
5689 
5690         instance = pci_get_drvdata(pdev);
5691         instance->unload = 1;
5692         host = instance->host;
5693         fusion = instance->ctrl_context;
5694 
5695         /* Shutdown SR-IOV heartbeat timer */
5696         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5697                 del_timer_sync(&instance->sriov_heartbeat_timer);
5698 
5699         if (instance->fw_crash_state != UNAVAILABLE)
5700                 megasas_free_host_crash_buffer(instance);
5701         scsi_remove_host(instance->host);
5702         megasas_flush_cache(instance);
5703         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5704 
5705         /* cancel the delayed work if this work still in queue*/
5706         if (instance->ev != NULL) {
5707                 struct megasas_aen_event *ev = instance->ev;
5708                 cancel_delayed_work_sync(&ev->hotplug_work);
5709                 instance->ev = NULL;
5710         }
5711 
5712         /* cancel all wait events */
5713         wake_up_all(&instance->int_cmd_wait_q);
5714 
5715         tasklet_kill(&instance->isr_tasklet);
5716 
5717         /*
5718          * Take the instance off the instance array. Note that we will not
5719          * decrement the max_index. We let this array be sparse array
5720          */
5721         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5722                 if (megasas_mgmt_info.instance[i] == instance) {
5723                         megasas_mgmt_info.count--;
5724                         megasas_mgmt_info.instance[i] = NULL;
5725 
5726                         break;
5727                 }
5728         }
5729 
5730         instance->instancet->disable_intr(instance);
5731 
5732         if (instance->msix_vectors)
5733                 for (i = 0; i < instance->msix_vectors; i++) {
5734                         if (smp_affinity_enable)
5735                                 irq_set_affinity_hint(
5736                                         instance->msixentry[i].vector, NULL);
5737                         free_irq(instance->msixentry[i].vector,
5738                                  &instance->irq_context[i]);
5739                 }
5740         else
5741                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5742         if (instance->msix_vectors)
5743                 pci_disable_msix(instance->pdev);
5744 
5745         switch (instance->pdev->device) {
5746         case PCI_DEVICE_ID_LSI_FUSION:
5747         case PCI_DEVICE_ID_LSI_PLASMA:
5748         case PCI_DEVICE_ID_LSI_INVADER:
5749         case PCI_DEVICE_ID_LSI_FURY:
5750                 megasas_release_fusion(instance);
5751                 for (i = 0; i < 2 ; i++) {
5752                         if (fusion->ld_map[i])
5753                                 dma_free_coherent(&instance->pdev->dev,
5754                                                   fusion->max_map_sz,
5755                                                   fusion->ld_map[i],
5756                                                   fusion->ld_map_phys[i]);
5757                         if (fusion->ld_drv_map[i])
5758                                 free_pages((ulong)fusion->ld_drv_map[i],
5759                                         fusion->drv_map_pages);
5760                 }
5761                 free_pages((ulong)instance->ctrl_context,
5762                         instance->ctrl_context_pages);
5763                 break;
5764         default:
5765                 megasas_release_mfi(instance);
5766                 pci_free_consistent(pdev, sizeof(u32),
5767                                     instance->producer,
5768                                     instance->producer_h);
5769                 pci_free_consistent(pdev, sizeof(u32),
5770                                     instance->consumer,
5771                                     instance->consumer_h);
5772                 break;
5773         }
5774 
5775         kfree(instance->ctrl_info);
5776 
5777         if (instance->evt_detail)
5778                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5779                                 instance->evt_detail, instance->evt_detail_h);
5780 
5781         if (instance->vf_affiliation)
5782                 pci_free_consistent(pdev, (MAX_LOGICAL_DRIVES + 1) *
5783                                     sizeof(struct MR_LD_VF_AFFILIATION),
5784                                     instance->vf_affiliation,
5785                                     instance->vf_affiliation_h);
5786 
5787         if (instance->vf_affiliation_111)
5788                 pci_free_consistent(pdev,
5789                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
5790                                     instance->vf_affiliation_111,
5791                                     instance->vf_affiliation_111_h);
5792 
5793         if (instance->hb_host_mem)
5794                 pci_free_consistent(pdev, sizeof(struct MR_CTRL_HB_HOST_MEM),
5795                                     instance->hb_host_mem,
5796                                     instance->hb_host_mem_h);
5797 
5798         if (instance->crash_dump_buf)
5799                 pci_free_consistent(pdev, CRASH_DMA_BUF_SIZE,
5800                             instance->crash_dump_buf, instance->crash_dump_h);
5801 
5802         scsi_host_put(host);
5803 
5804         pci_disable_device(pdev);
5805 
5806         return;
5807 }
5808 
5809 /**
5810  * megasas_shutdown -   Shutdown entry point
5811  * @device:             Generic device structure
5812  */
5813 static void megasas_shutdown(struct pci_dev *pdev)
5814 {
5815         int i;
5816         struct megasas_instance *instance = pci_get_drvdata(pdev);
5817 
5818         instance->unload = 1;
5819         megasas_flush_cache(instance);
5820         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5821         instance->instancet->disable_intr(instance);
5822         if (instance->msix_vectors)
5823                 for (i = 0; i < instance->msix_vectors; i++) {
5824                         if (smp_affinity_enable)
5825                                 irq_set_affinity_hint(
5826                                         instance->msixentry[i].vector, NULL);
5827                         free_irq(instance->msixentry[i].vector,
5828                                  &instance->irq_context[i]);
5829                 }
5830         else
5831                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5832         if (instance->msix_vectors)
5833                 pci_disable_msix(instance->pdev);
5834 }
5835 
5836 /**
5837  * megasas_mgmt_open -  char node "open" entry point
5838  */
5839 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
5840 {
5841         /*
5842          * Allow only those users with admin rights
5843          */
5844         if (!capable(CAP_SYS_ADMIN))
5845                 return -EACCES;
5846 
5847         return 0;
5848 }
5849 
5850 /**
5851  * megasas_mgmt_fasync -        Async notifier registration from applications
5852  *
5853  * This function adds the calling process to a driver global queue. When an
5854  * event occurs, SIGIO will be sent to all processes in this queue.
5855  */
5856 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
5857 {
5858         int rc;
5859 
5860         mutex_lock(&megasas_async_queue_mutex);
5861 
5862         rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
5863 
5864         mutex_unlock(&megasas_async_queue_mutex);
5865 
5866         if (rc >= 0) {
5867                 /* For sanity check when we get ioctl */
5868                 filep->private_data = filep;
5869                 return 0;
5870         }
5871 
5872         printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
5873 
5874         return rc;
5875 }
5876 
5877 /**
5878  * megasas_mgmt_poll -  char node "poll" entry point
5879  * */
5880 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
5881 {
5882         unsigned int mask;
5883         unsigned long flags;
5884         poll_wait(file, &megasas_poll_wait, wait);
5885         spin_lock_irqsave(&poll_aen_lock, flags);
5886         if (megasas_poll_wait_aen)
5887                 mask =   (POLLIN | POLLRDNORM);
5888 
5889         else
5890                 mask = 0;
5891         megasas_poll_wait_aen = 0;
5892         spin_unlock_irqrestore(&poll_aen_lock, flags);
5893         return mask;
5894 }
5895 
5896 /*
5897  * megasas_set_crash_dump_params_ioctl:
5898  *              Send CRASH_DUMP_MODE DCMD to all controllers
5899  * @cmd:        MFI command frame
5900  */
5901 
5902 static int megasas_set_crash_dump_params_ioctl(
5903         struct megasas_cmd *cmd)
5904 {
5905         struct megasas_instance *local_instance;
5906         int i, error = 0;
5907         int crash_support;
5908 
5909         crash_support = cmd->frame->dcmd.mbox.w[0];
5910 
5911         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5912                 local_instance = megasas_mgmt_info.instance[i];
5913                 if (local_instance && local_instance->crash_dump_drv_support) {
5914                         if ((local_instance->adprecovery ==
5915                                 MEGASAS_HBA_OPERATIONAL) &&
5916                                 !megasas_set_crash_dump_params(local_instance,
5917                                         crash_support)) {
5918                                 local_instance->crash_dump_app_support =
5919                                         crash_support;
5920                                 dev_info(&local_instance->pdev->dev,
5921                                         "Application firmware crash "
5922                                         "dump mode set success\n");
5923                                 error = 0;
5924                         } else {
5925                                 dev_info(&local_instance->pdev->dev,
5926                                         "Application firmware crash "
5927                                         "dump mode set failed\n");
5928                                 error = -1;
5929                         }
5930                 }
5931         }
5932         return error;
5933 }
5934 
5935 /**
5936  * megasas_mgmt_fw_ioctl -      Issues management ioctls to FW
5937  * @instance:                   Adapter soft state
5938  * @argp:                       User's ioctl packet
5939  */
5940 static int
5941 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
5942                       struct megasas_iocpacket __user * user_ioc,
5943                       struct megasas_iocpacket *ioc)
5944 {
5945         struct megasas_sge32 *kern_sge32;
5946         struct megasas_cmd *cmd;
5947         void *kbuff_arr[MAX_IOCTL_SGE];
5948         dma_addr_t buf_handle = 0;
5949         int error = 0, i;
5950         void *sense = NULL;
5951         dma_addr_t sense_handle;
5952         unsigned long *sense_ptr;
5953 
5954         memset(kbuff_arr, 0, sizeof(kbuff_arr));
5955 
5956         if (ioc->sge_count > MAX_IOCTL_SGE) {
5957                 printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
5958                        ioc->sge_count, MAX_IOCTL_SGE);
5959                 return -EINVAL;
5960         }
5961 
5962         cmd = megasas_get_cmd(instance);
5963         if (!cmd) {
5964                 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
5965                 return -ENOMEM;
5966         }
5967 
5968         /*
5969          * User's IOCTL packet has 2 frames (maximum). Copy those two
5970          * frames into our cmd's frames. cmd->frame's context will get
5971          * overwritten when we copy from user's frames. So set that value
5972          * alone separately
5973          */
5974         memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
5975         cmd->frame->hdr.context = cpu_to_le32(cmd->index);
5976         cmd->frame->hdr.pad_0 = 0;
5977         cmd->frame->hdr.flags &= cpu_to_le16(~(MFI_FRAME_IEEE |
5978                                                MFI_FRAME_SGL64 |
5979                                                MFI_FRAME_SENSE64));
5980 
5981         if (cmd->frame->dcmd.opcode == MR_DRIVER_SET_APP_CRASHDUMP_MODE) {
5982                 error = megasas_set_crash_dump_params_ioctl(cmd);
5983                 megasas_return_cmd(instance, cmd);
5984                 return error;
5985         }
5986 
5987         /*
5988          * The management interface between applications and the fw uses
5989          * MFI frames. E.g, RAID configuration changes, LD property changes
5990          * etc are accomplishes through different kinds of MFI frames. The
5991          * driver needs to care only about substituting user buffers with
5992          * kernel buffers in SGLs. The location of SGL is embedded in the
5993          * struct iocpacket itself.
5994          */
5995         kern_sge32 = (struct megasas_sge32 *)
5996             ((unsigned long)cmd->frame + ioc->sgl_off);
5997 
5998         /*
5999          * For each user buffer, create a mirror buffer and copy in
6000          */
6001         for (i = 0; i < ioc->sge_count; i++) {
6002                 if (!ioc->sgl[i].iov_len)
6003                         continue;
6004 
6005                 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
6006                                                     ioc->sgl[i].iov_len,
6007                                                     &buf_handle, GFP_KERNEL);
6008                 if (!kbuff_arr[i]) {
6009                         printk(KERN_DEBUG "megasas: Failed to alloc "
6010                                "kernel SGL buffer for IOCTL \n");
6011                         error = -ENOMEM;
6012                         goto out;
6013                 }
6014 
6015                 /*
6016                  * We don't change the dma_coherent_mask, so
6017                  * pci_alloc_consistent only returns 32bit addresses
6018                  */
6019                 kern_sge32[i].phys_addr = cpu_to_le32(buf_handle);
6020                 kern_sge32[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
6021 
6022                 /*
6023                  * We created a kernel buffer corresponding to the
6024                  * user buffer. Now copy in from the user buffer
6025                  */
6026                 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
6027                                    (u32) (ioc->sgl[i].iov_len))) {
6028                         error = -EFAULT;
6029                         goto out;
6030                 }
6031         }
6032 
6033         if (ioc->sense_len) {
6034                 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
6035                                              &sense_handle, GFP_KERNEL);
6036                 if (!sense) {
6037                         error = -ENOMEM;
6038                         goto out;
6039                 }
6040 
6041                 sense_ptr =
6042                 (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
6043                 *sense_ptr = cpu_to_le32(sense_handle);
6044         }
6045 
6046         /*
6047          * Set the sync_cmd flag so that the ISR knows not to complete this
6048          * cmd to the SCSI mid-layer
6049          */
6050         cmd->sync_cmd = 1;
6051         megasas_issue_blocked_cmd(instance, cmd, 0);
6052         cmd->sync_cmd = 0;
6053 
6054         /*
6055          * copy out the kernel buffers to user buffers
6056          */
6057         for (i = 0; i < ioc->sge_count; i++) {
6058                 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
6059                                  ioc->sgl[i].iov_len)) {
6060                         error = -EFAULT;
6061                         goto out;
6062                 }
6063         }
6064 
6065         /*
6066          * copy out the sense
6067          */
6068         if (ioc->sense_len) {
6069                 /*
6070                  * sense_ptr points to the location that has the user
6071                  * sense buffer address
6072                  */
6073                 sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
6074                                 ioc->sense_off);
6075 
6076                 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
6077                                  sense, ioc->sense_len)) {
6078                         printk(KERN_ERR "megasas: Failed to copy out to user "
6079                                         "sense data\n");
6080                         error = -EFAULT;
6081                         goto out;
6082                 }
6083         }
6084 
6085         /*
6086          * copy the status codes returned by the fw
6087          */
6088         if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
6089                          &cmd->frame->hdr.cmd_status, sizeof(u8))) {
6090                 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
6091                 error = -EFAULT;
6092         }
6093 
6094       out:
6095         if (sense) {
6096                 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
6097                                     sense, sense_handle);
6098         }
6099 
6100         for (i = 0; i < ioc->sge_count; i++) {
6101                 if (kbuff_arr[i])
6102                         dma_free_coherent(&instance->pdev->dev,
6103                                           le32_to_cpu(kern_sge32[i].length),
6104                                           kbuff_arr[i],
6105                                           le32_to_cpu(kern_sge32[i].phys_addr));
6106                         kbuff_arr[i] = NULL;
6107         }
6108 
6109         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
6110                 megasas_return_mfi_mpt_pthr(instance, cmd,
6111                         cmd->mpt_pthr_cmd_blocked);
6112         else
6113                 megasas_return_cmd(instance, cmd);
6114         return error;
6115 }
6116 
6117 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
6118 {
6119         struct megasas_iocpacket __user *user_ioc =
6120             (struct megasas_iocpacket __user *)arg;
6121         struct megasas_iocpacket *ioc;
6122         struct megasas_instance *instance;
6123         int error;
6124         int i;
6125         unsigned long flags;
6126         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6127 
6128         ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6129         if (!ioc)
6130                 return -ENOMEM;
6131 
6132         if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
6133                 error = -EFAULT;
6134                 goto out_kfree_ioc;
6135         }
6136 
6137         instance = megasas_lookup_instance(ioc->host_no);
6138         if (!instance) {
6139                 error = -ENODEV;
6140                 goto out_kfree_ioc;
6141         }
6142 
6143         /* Adjust ioctl wait time for VF mode */
6144         if (instance->requestorId)
6145                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
6146 
6147         /* Block ioctls in VF mode */
6148         if (instance->requestorId && !allow_vf_ioctls) {
6149                 error = -ENODEV;
6150                 goto out_kfree_ioc;
6151         }
6152 
6153         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6154                 printk(KERN_ERR "Controller in crit error\n");
6155                 error = -ENODEV;
6156                 goto out_kfree_ioc;
6157         }
6158 
6159         if (instance->unload == 1) {
6160                 error = -ENODEV;
6161                 goto out_kfree_ioc;
6162         }
6163 
6164         /*
6165          * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
6166          */
6167         if (down_interruptible(&instance->ioctl_sem)) {
6168                 error = -ERESTARTSYS;
6169                 goto out_kfree_ioc;
6170         }
6171 
6172         for (i = 0; i < wait_time; i++) {
6173 
6174                 spin_lock_irqsave(&instance->hba_lock, flags);
6175                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6176                         spin_unlock_irqrestore(&instance->hba_lock, flags);
6177                         break;
6178                 }
6179                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6180 
6181                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6182                         printk(KERN_NOTICE "megasas: waiting"
6183                                 "for controller reset to finish\n");
6184                 }
6185 
6186                 msleep(1000);
6187         }
6188 
6189         spin_lock_irqsave(&instance->hba_lock, flags);
6190         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6191                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6192 
6193                 printk(KERN_ERR "megaraid_sas: timed out while"
6194                         "waiting for HBA to recover\n");
6195                 error = -ENODEV;
6196                 goto out_up;
6197         }
6198         spin_unlock_irqrestore(&instance->hba_lock, flags);
6199 
6200         error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
6201       out_up:
6202         up(&instance->ioctl_sem);
6203 
6204       out_kfree_ioc:
6205         kfree(ioc);
6206         return error;
6207 }
6208 
6209 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
6210 {
6211         struct megasas_instance *instance;
6212         struct megasas_aen aen;
6213         int error;
6214         int i;
6215         unsigned long flags;
6216         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6217 
6218         if (file->private_data != file) {
6219                 printk(KERN_DEBUG "megasas: fasync_helper was not "
6220                        "called first\n");
6221                 return -EINVAL;
6222         }
6223 
6224         if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
6225                 return -EFAULT;
6226 
6227         instance = megasas_lookup_instance(aen.host_no);
6228 
6229         if (!instance)
6230                 return -ENODEV;
6231 
6232         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6233                 return -ENODEV;
6234         }
6235 
6236         if (instance->unload == 1) {
6237                 return -ENODEV;
6238         }
6239 
6240         for (i = 0; i < wait_time; i++) {
6241 
6242                 spin_lock_irqsave(&instance->hba_lock, flags);
6243                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6244                         spin_unlock_irqrestore(&instance->hba_lock,
6245                                                 flags);
6246                         break;
6247                 }
6248 
6249                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6250 
6251                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6252                         printk(KERN_NOTICE "megasas: waiting for"
6253                                 "controller reset to finish\n");
6254                 }
6255 
6256                 msleep(1000);
6257         }
6258 
6259         spin_lock_irqsave(&instance->hba_lock, flags);
6260         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6261                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6262                 printk(KERN_ERR "megaraid_sas: timed out while waiting"
6263                                 "for HBA to recover.\n");
6264                 return -ENODEV;
6265         }
6266         spin_unlock_irqrestore(&instance->hba_lock, flags);
6267 
6268         mutex_lock(&instance->aen_mutex);
6269         error = megasas_register_aen(instance, aen.seq_num,
6270                                      aen.class_locale_word);
6271         mutex_unlock(&instance->aen_mutex);
6272         return error;
6273 }
6274 
6275 /**
6276  * megasas_mgmt_ioctl - char node ioctl entry point
6277  */
6278 static long
6279 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
6280 {
6281         switch (cmd) {
6282         case MEGASAS_IOC_FIRMWARE:
6283                 return megasas_mgmt_ioctl_fw(file, arg);
6284 
6285         case MEGASAS_IOC_GET_AEN:
6286                 return megasas_mgmt_ioctl_aen(file, arg);
6287         }
6288 
6289         return -ENOTTY;
6290 }
6291 
6292 #ifdef CONFIG_COMPAT
6293 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
6294 {
6295         struct compat_megasas_iocpacket __user *cioc =
6296             (struct compat_megasas_iocpacket __user *)arg;
6297         struct megasas_iocpacket __user *ioc =
6298             compat_alloc_user_space(sizeof(struct megasas_iocpacket));
6299         int i;
6300         int error = 0;
6301         compat_uptr_t ptr;
6302 
6303         if (clear_user(ioc, sizeof(*ioc)))
6304                 return -EFAULT;
6305 
6306         if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
6307             copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
6308             copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
6309             copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
6310             copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
6311             copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
6312                 return -EFAULT;
6313 
6314         /*
6315          * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
6316          * sense_len is not null, so prepare the 64bit value under
6317          * the same condition.
6318          */
6319         if (ioc->sense_len) {
6320                 void __user **sense_ioc_ptr =
6321                         (void __user **)(ioc->frame.raw + ioc->sense_off);
6322                 compat_uptr_t *sense_cioc_ptr =
6323                         (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
6324                 if (get_user(ptr, sense_cioc_ptr) ||
6325                     put_user(compat_ptr(ptr), sense_ioc_ptr))
6326                         return -EFAULT;
6327         }
6328 
6329         for (i = 0; i < MAX_IOCTL_SGE; i++) {
6330                 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
6331                     put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
6332                     copy_in_user(&ioc->sgl[i].iov_len,
6333                                  &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
6334                         return -EFAULT;
6335         }
6336 
6337         error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
6338 
6339         if (copy_in_user(&cioc->frame.hdr.cmd_status,
6340                          &ioc->frame.hdr.cmd_status, sizeof(u8))) {
6341                 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
6342                 return -EFAULT;
6343         }
6344         return error;
6345 }
6346 
6347 static long
6348 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
6349                           unsigned long arg)
6350 {
6351         switch (cmd) {
6352         case MEGASAS_IOC_FIRMWARE32:
6353                 return megasas_mgmt_compat_ioctl_fw(file, arg);
6354         case MEGASAS_IOC_GET_AEN:
6355                 return megasas_mgmt_ioctl_aen(file, arg);
6356         }
6357 
6358         return -ENOTTY;
6359 }
6360 #endif
6361 
6362 /*
6363  * File operations structure for management interface
6364  */
6365 static const struct file_operations megasas_mgmt_fops = {
6366         .owner = THIS_MODULE,
6367         .open = megasas_mgmt_open,
6368         .fasync = megasas_mgmt_fasync,
6369         .unlocked_ioctl = megasas_mgmt_ioctl,
6370         .poll = megasas_mgmt_poll,
6371 #ifdef CONFIG_COMPAT
6372         .compat_ioctl = megasas_mgmt_compat_ioctl,
6373 #endif
6374         .llseek = noop_llseek,
6375 };
6376 
6377 /*
6378  * PCI hotplug support registration structure
6379  */
6380 static struct pci_driver megasas_pci_driver = {
6381 
6382         .name = "megaraid_sas",
6383         .id_table = megasas_pci_table,
6384         .probe = megasas_probe_one,
6385         .remove = megasas_detach_one,
6386         .suspend = megasas_suspend,
6387         .resume = megasas_resume,
6388         .shutdown = megasas_shutdown,
6389 };
6390 
6391 /*
6392  * Sysfs driver attributes
6393  */
6394 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
6395 {
6396         return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
6397                         MEGASAS_VERSION);
6398 }
6399 
6400 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
6401 
6402 static ssize_t
6403 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
6404 {
6405         return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
6406                         MEGASAS_RELDATE);
6407 }
6408 
6409 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
6410                    NULL);
6411 
6412 static ssize_t
6413 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
6414 {
6415         return sprintf(buf, "%u\n", support_poll_for_event);
6416 }
6417 
6418 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
6419                         megasas_sysfs_show_support_poll_for_event, NULL);
6420 
6421  static ssize_t
6422 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
6423 {
6424         return sprintf(buf, "%u\n", support_device_change);
6425 }
6426 
6427 static DRIVER_ATTR(support_device_change, S_IRUGO,
6428                         megasas_sysfs_show_support_device_change, NULL);
6429 
6430 static ssize_t
6431 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
6432 {
6433         return sprintf(buf, "%u\n", megasas_dbg_lvl);
6434 }
6435 
6436 static ssize_t
6437 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
6438 {
6439         int retval = count;
6440         if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
6441                 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
6442                 retval = -EINVAL;
6443         }
6444         return retval;
6445 }
6446 
6447 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
6448                 megasas_sysfs_set_dbg_lvl);
6449 
6450 static void
6451 megasas_aen_polling(struct work_struct *work)
6452 {
6453         struct megasas_aen_event *ev =
6454                 container_of(work, struct megasas_aen_event, hotplug_work.work);
6455         struct megasas_instance *instance = ev->instance;
6456         union megasas_evt_class_locale class_locale;
6457         struct  Scsi_Host *host;
6458         struct  scsi_device *sdev1;
6459         u16     pd_index = 0;
6460         u16     ld_index = 0;
6461         int     i, j, doscan = 0;
6462         u32 seq_num, wait_time = MEGASAS_RESET_WAIT_TIME;
6463         int error;
6464 
6465         if (!instance) {
6466                 printk(KERN_ERR "invalid instance!\n");
6467                 kfree(ev);
6468                 return;
6469         }
6470 
6471         /* Adjust event workqueue thread wait time for VF mode */
6472         if (instance->requestorId)
6473                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
6474 
6475         /* Don't run the event workqueue thread if OCR is running */
6476         for (i = 0; i < wait_time; i++) {
6477                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL)
6478                         break;
6479                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6480                         printk(KERN_NOTICE "megasas: %s waiting for "
6481                                "controller reset to finish for scsi%d\n",
6482                                __func__, instance->host->host_no);
6483                 }
6484                 msleep(1000);
6485         }
6486 
6487         instance->ev = NULL;
6488         host = instance->host;
6489         if (instance->evt_detail) {
6490 
6491                 switch (le32_to_cpu(instance->evt_detail->code)) {
6492                 case MR_EVT_PD_INSERTED:
6493                         if (megasas_get_pd_list(instance) == 0) {
6494                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6495                                 for (j = 0;
6496                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6497                                 j++) {
6498 
6499                                 pd_index =
6500                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6501 
6502                                 sdev1 =
6503                                 scsi_device_lookup(host, i, j, 0);
6504 
6505                                 if (instance->pd_list[pd_index].driveState
6506                                                 == MR_PD_STATE_SYSTEM) {
6507                                                 if (!sdev1) {
6508                                                 scsi_add_device(host, i, j, 0);
6509                                                 }
6510 
6511                                         if (sdev1)
6512                                                 scsi_device_put(sdev1);
6513                                         }
6514                                 }
6515                         }
6516                         }
6517                         doscan = 0;
6518                         break;
6519 
6520                 case MR_EVT_PD_REMOVED:
6521                         if (megasas_get_pd_list(instance) == 0) {
6522                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6523                                 for (j = 0;
6524                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6525                                 j++) {
6526 
6527                                 pd_index =
6528                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6529 
6530                                 sdev1 =
6531                                 scsi_device_lookup(host, i, j, 0);
6532 
6533                                 if (instance->pd_list[pd_index].driveState
6534                                         == MR_PD_STATE_SYSTEM) {
6535                                         if (sdev1) {
6536