Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 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

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 : 06.803.01.00-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 MODULE_LICENSE("GPL");
 93 MODULE_VERSION(MEGASAS_VERSION);
 94 MODULE_AUTHOR("megaraidlinux@lsi.com");
 95 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
 96 
 97 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
 98 static int megasas_get_pd_list(struct megasas_instance *instance);
 99 static int megasas_ld_list_query(struct megasas_instance *instance,
100                                  u8 query_type);
101 static int megasas_issue_init_mfi(struct megasas_instance *instance);
102 static int megasas_register_aen(struct megasas_instance *instance,
103                                 u32 seq_num, u32 class_locale_word);
104 /*
105  * PCI ID table for all supported controllers
106  */
107 static struct pci_device_id megasas_pci_table[] = {
108 
109         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
110         /* xscale IOP */
111         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
112         /* ppc IOP */
113         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
114         /* ppc IOP */
115         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
116         /* gen2*/
117         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
118         /* gen2*/
119         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
120         /* skinny*/
121         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
122         /* skinny*/
123         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
124         /* xscale IOP, vega */
125         {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
126         /* xscale IOP */
127         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
128         /* Fusion */
129         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
130         /* Plasma */
131         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
132         /* Invader */
133         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FURY)},
134         /* Fury */
135         {}
136 };
137 
138 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
139 
140 static int megasas_mgmt_majorno;
141 struct megasas_mgmt_info megasas_mgmt_info;
142 static struct fasync_struct *megasas_async_queue;
143 static DEFINE_MUTEX(megasas_async_queue_mutex);
144 
145 static int megasas_poll_wait_aen;
146 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
147 static u32 support_poll_for_event;
148 u32 megasas_dbg_lvl;
149 static u32 support_device_change;
150 
151 /* define lock for aen poll */
152 spinlock_t poll_aen_lock;
153 
154 void
155 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
156                      u8 alt_status);
157 static u32
158 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
159 static int
160 megasas_adp_reset_gen2(struct megasas_instance *instance,
161                        struct megasas_register_set __iomem *reg_set);
162 static irqreturn_t megasas_isr(int irq, void *devp);
163 static u32
164 megasas_init_adapter_mfi(struct megasas_instance *instance);
165 u32
166 megasas_build_and_issue_cmd(struct megasas_instance *instance,
167                             struct scsi_cmnd *scmd);
168 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
169 void
170 megasas_release_fusion(struct megasas_instance *instance);
171 int
172 megasas_ioc_init_fusion(struct megasas_instance *instance);
173 void
174 megasas_free_cmds_fusion(struct megasas_instance *instance);
175 u8
176 megasas_get_map_info(struct megasas_instance *instance);
177 int
178 megasas_sync_map_info(struct megasas_instance *instance);
179 int
180 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
181         int seconds);
182 void megasas_reset_reply_desc(struct megasas_instance *instance);
183 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout);
184 void megasas_fusion_ocr_wq(struct work_struct *work);
185 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
186                                          int initial);
187 int megasas_check_mpio_paths(struct megasas_instance *instance,
188                              struct scsi_cmnd *scmd);
189 
190 void
191 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
192 {
193         instance->instancet->fire_cmd(instance,
194                 cmd->frame_phys_addr, 0, instance->reg_set);
195 }
196 
197 /**
198  * megasas_get_cmd -    Get a command from the free pool
199  * @instance:           Adapter soft state
200  *
201  * Returns a free command from the pool
202  */
203 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
204                                                   *instance)
205 {
206         unsigned long flags;
207         struct megasas_cmd *cmd = NULL;
208 
209         spin_lock_irqsave(&instance->cmd_pool_lock, flags);
210 
211         if (!list_empty(&instance->cmd_pool)) {
212                 cmd = list_entry((&instance->cmd_pool)->next,
213                                  struct megasas_cmd, list);
214                 list_del_init(&cmd->list);
215         } else {
216                 printk(KERN_ERR "megasas: Command pool empty!\n");
217         }
218 
219         spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
220         return cmd;
221 }
222 
223 /**
224  * megasas_return_cmd - Return a cmd to free command pool
225  * @instance:           Adapter soft state
226  * @cmd:                Command packet to be returned to free command pool
227  */
228 inline void
229 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
230 {
231         unsigned long flags;
232 
233         spin_lock_irqsave(&instance->cmd_pool_lock, flags);
234 
235         cmd->scmd = NULL;
236         cmd->frame_count = 0;
237         if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
238             (instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
239             (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
240             (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
241             (reset_devices))
242                 cmd->frame->hdr.cmd = MFI_CMD_INVALID;
243         list_add_tail(&cmd->list, &instance->cmd_pool);
244 
245         spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
246 }
247 
248 
249 /**
250 *       The following functions are defined for xscale
251 *       (deviceid : 1064R, PERC5) controllers
252 */
253 
254 /**
255  * megasas_enable_intr_xscale - Enables interrupts
256  * @regs:                       MFI register set
257  */
258 static inline void
259 megasas_enable_intr_xscale(struct megasas_instance *instance)
260 {
261         struct megasas_register_set __iomem *regs;
262         regs = instance->reg_set;
263         writel(0, &(regs)->outbound_intr_mask);
264 
265         /* Dummy readl to force pci flush */
266         readl(&regs->outbound_intr_mask);
267 }
268 
269 /**
270  * megasas_disable_intr_xscale -Disables interrupt
271  * @regs:                       MFI register set
272  */
273 static inline void
274 megasas_disable_intr_xscale(struct megasas_instance *instance)
275 {
276         struct megasas_register_set __iomem *regs;
277         u32 mask = 0x1f;
278         regs = instance->reg_set;
279         writel(mask, &regs->outbound_intr_mask);
280         /* Dummy readl to force pci flush */
281         readl(&regs->outbound_intr_mask);
282 }
283 
284 /**
285  * megasas_read_fw_status_reg_xscale - returns the current FW status value
286  * @regs:                       MFI register set
287  */
288 static u32
289 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
290 {
291         return readl(&(regs)->outbound_msg_0);
292 }
293 /**
294  * megasas_clear_interrupt_xscale -     Check & clear interrupt
295  * @regs:                               MFI register set
296  */
297 static int
298 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
299 {
300         u32 status;
301         u32 mfiStatus = 0;
302         /*
303          * Check if it is our interrupt
304          */
305         status = readl(&regs->outbound_intr_status);
306 
307         if (status & MFI_OB_INTR_STATUS_MASK)
308                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
309         if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
310                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
311 
312         /*
313          * Clear the interrupt by writing back the same value
314          */
315         if (mfiStatus)
316                 writel(status, &regs->outbound_intr_status);
317 
318         /* Dummy readl to force pci flush */
319         readl(&regs->outbound_intr_status);
320 
321         return mfiStatus;
322 }
323 
324 /**
325  * megasas_fire_cmd_xscale -    Sends command to the FW
326  * @frame_phys_addr :           Physical address of cmd
327  * @frame_count :               Number of frames for the command
328  * @regs :                      MFI register set
329  */
330 static inline void
331 megasas_fire_cmd_xscale(struct megasas_instance *instance,
332                 dma_addr_t frame_phys_addr,
333                 u32 frame_count,
334                 struct megasas_register_set __iomem *regs)
335 {
336         unsigned long flags;
337         spin_lock_irqsave(&instance->hba_lock, flags);
338         writel((frame_phys_addr >> 3)|(frame_count),
339                &(regs)->inbound_queue_port);
340         spin_unlock_irqrestore(&instance->hba_lock, flags);
341 }
342 
343 /**
344  * megasas_adp_reset_xscale -  For controller reset
345  * @regs:                              MFI register set
346  */
347 static int
348 megasas_adp_reset_xscale(struct megasas_instance *instance,
349         struct megasas_register_set __iomem *regs)
350 {
351         u32 i;
352         u32 pcidata;
353         writel(MFI_ADP_RESET, &regs->inbound_doorbell);
354 
355         for (i = 0; i < 3; i++)
356                 msleep(1000); /* sleep for 3 secs */
357         pcidata  = 0;
358         pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
359         printk(KERN_NOTICE "pcidata = %x\n", pcidata);
360         if (pcidata & 0x2) {
361                 printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
362                 pcidata &= ~0x2;
363                 pci_write_config_dword(instance->pdev,
364                                 MFI_1068_PCSR_OFFSET, pcidata);
365 
366                 for (i = 0; i < 2; i++)
367                         msleep(1000); /* need to wait 2 secs again */
368 
369                 pcidata  = 0;
370                 pci_read_config_dword(instance->pdev,
371                                 MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
372                 printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
373                 if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
374                         printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
375                         pcidata = 0;
376                         pci_write_config_dword(instance->pdev,
377                                 MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
378                 }
379         }
380         return 0;
381 }
382 
383 /**
384  * megasas_check_reset_xscale - For controller reset check
385  * @regs:                               MFI register set
386  */
387 static int
388 megasas_check_reset_xscale(struct megasas_instance *instance,
389                 struct megasas_register_set __iomem *regs)
390 {
391 
392         if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
393             (le32_to_cpu(*instance->consumer) ==
394                 MEGASAS_ADPRESET_INPROG_SIGN))
395                 return 1;
396         return 0;
397 }
398 
399 static struct megasas_instance_template megasas_instance_template_xscale = {
400 
401         .fire_cmd = megasas_fire_cmd_xscale,
402         .enable_intr = megasas_enable_intr_xscale,
403         .disable_intr = megasas_disable_intr_xscale,
404         .clear_intr = megasas_clear_intr_xscale,
405         .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
406         .adp_reset = megasas_adp_reset_xscale,
407         .check_reset = megasas_check_reset_xscale,
408         .service_isr = megasas_isr,
409         .tasklet = megasas_complete_cmd_dpc,
410         .init_adapter = megasas_init_adapter_mfi,
411         .build_and_issue_cmd = megasas_build_and_issue_cmd,
412         .issue_dcmd = megasas_issue_dcmd,
413 };
414 
415 /**
416 *       This is the end of set of functions & definitions specific
417 *       to xscale (deviceid : 1064R, PERC5) controllers
418 */
419 
420 /**
421 *       The following functions are defined for ppc (deviceid : 0x60)
422 *       controllers
423 */
424 
425 /**
426  * megasas_enable_intr_ppc -    Enables interrupts
427  * @regs:                       MFI register set
428  */
429 static inline void
430 megasas_enable_intr_ppc(struct megasas_instance *instance)
431 {
432         struct megasas_register_set __iomem *regs;
433         regs = instance->reg_set;
434         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
435 
436         writel(~0x80000000, &(regs)->outbound_intr_mask);
437 
438         /* Dummy readl to force pci flush */
439         readl(&regs->outbound_intr_mask);
440 }
441 
442 /**
443  * megasas_disable_intr_ppc -   Disable interrupt
444  * @regs:                       MFI register set
445  */
446 static inline void
447 megasas_disable_intr_ppc(struct megasas_instance *instance)
448 {
449         struct megasas_register_set __iomem *regs;
450         u32 mask = 0xFFFFFFFF;
451         regs = instance->reg_set;
452         writel(mask, &regs->outbound_intr_mask);
453         /* Dummy readl to force pci flush */
454         readl(&regs->outbound_intr_mask);
455 }
456 
457 /**
458  * megasas_read_fw_status_reg_ppc - returns the current FW status value
459  * @regs:                       MFI register set
460  */
461 static u32
462 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
463 {
464         return readl(&(regs)->outbound_scratch_pad);
465 }
466 
467 /**
468  * megasas_clear_interrupt_ppc -        Check & clear interrupt
469  * @regs:                               MFI register set
470  */
471 static int
472 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
473 {
474         u32 status, mfiStatus = 0;
475 
476         /*
477          * Check if it is our interrupt
478          */
479         status = readl(&regs->outbound_intr_status);
480 
481         if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
482                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
483 
484         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
485                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
486 
487         /*
488          * Clear the interrupt by writing back the same value
489          */
490         writel(status, &regs->outbound_doorbell_clear);
491 
492         /* Dummy readl to force pci flush */
493         readl(&regs->outbound_doorbell_clear);
494 
495         return mfiStatus;
496 }
497 
498 /**
499  * megasas_fire_cmd_ppc -       Sends command to the FW
500  * @frame_phys_addr :           Physical address of cmd
501  * @frame_count :               Number of frames for the command
502  * @regs :                      MFI register set
503  */
504 static inline void
505 megasas_fire_cmd_ppc(struct megasas_instance *instance,
506                 dma_addr_t frame_phys_addr,
507                 u32 frame_count,
508                 struct megasas_register_set __iomem *regs)
509 {
510         unsigned long flags;
511         spin_lock_irqsave(&instance->hba_lock, flags);
512         writel((frame_phys_addr | (frame_count<<1))|1,
513                         &(regs)->inbound_queue_port);
514         spin_unlock_irqrestore(&instance->hba_lock, flags);
515 }
516 
517 /**
518  * megasas_check_reset_ppc -    For controller reset check
519  * @regs:                               MFI register set
520  */
521 static int
522 megasas_check_reset_ppc(struct megasas_instance *instance,
523                         struct megasas_register_set __iomem *regs)
524 {
525         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
526                 return 1;
527 
528         return 0;
529 }
530 
531 static struct megasas_instance_template megasas_instance_template_ppc = {
532 
533         .fire_cmd = megasas_fire_cmd_ppc,
534         .enable_intr = megasas_enable_intr_ppc,
535         .disable_intr = megasas_disable_intr_ppc,
536         .clear_intr = megasas_clear_intr_ppc,
537         .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
538         .adp_reset = megasas_adp_reset_xscale,
539         .check_reset = megasas_check_reset_ppc,
540         .service_isr = megasas_isr,
541         .tasklet = megasas_complete_cmd_dpc,
542         .init_adapter = megasas_init_adapter_mfi,
543         .build_and_issue_cmd = megasas_build_and_issue_cmd,
544         .issue_dcmd = megasas_issue_dcmd,
545 };
546 
547 /**
548  * megasas_enable_intr_skinny - Enables interrupts
549  * @regs:                       MFI register set
550  */
551 static inline void
552 megasas_enable_intr_skinny(struct megasas_instance *instance)
553 {
554         struct megasas_register_set __iomem *regs;
555         regs = instance->reg_set;
556         writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
557 
558         writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
559 
560         /* Dummy readl to force pci flush */
561         readl(&regs->outbound_intr_mask);
562 }
563 
564 /**
565  * megasas_disable_intr_skinny -        Disables interrupt
566  * @regs:                       MFI register set
567  */
568 static inline void
569 megasas_disable_intr_skinny(struct megasas_instance *instance)
570 {
571         struct megasas_register_set __iomem *regs;
572         u32 mask = 0xFFFFFFFF;
573         regs = instance->reg_set;
574         writel(mask, &regs->outbound_intr_mask);
575         /* Dummy readl to force pci flush */
576         readl(&regs->outbound_intr_mask);
577 }
578 
579 /**
580  * megasas_read_fw_status_reg_skinny - returns the current FW status value
581  * @regs:                       MFI register set
582  */
583 static u32
584 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
585 {
586         return readl(&(regs)->outbound_scratch_pad);
587 }
588 
589 /**
590  * megasas_clear_interrupt_skinny -     Check & clear interrupt
591  * @regs:                               MFI register set
592  */
593 static int
594 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
595 {
596         u32 status;
597         u32 mfiStatus = 0;
598 
599         /*
600          * Check if it is our interrupt
601          */
602         status = readl(&regs->outbound_intr_status);
603 
604         if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
605                 return 0;
606         }
607 
608         /*
609          * Check if it is our interrupt
610          */
611         if ((megasas_read_fw_status_reg_skinny(regs) & MFI_STATE_MASK) ==
612             MFI_STATE_FAULT) {
613                 mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
614         } else
615                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
616 
617         /*
618          * Clear the interrupt by writing back the same value
619          */
620         writel(status, &regs->outbound_intr_status);
621 
622         /*
623         * dummy read to flush PCI
624         */
625         readl(&regs->outbound_intr_status);
626 
627         return mfiStatus;
628 }
629 
630 /**
631  * megasas_fire_cmd_skinny -    Sends command to the FW
632  * @frame_phys_addr :           Physical address of cmd
633  * @frame_count :               Number of frames for the command
634  * @regs :                      MFI register set
635  */
636 static inline void
637 megasas_fire_cmd_skinny(struct megasas_instance *instance,
638                         dma_addr_t frame_phys_addr,
639                         u32 frame_count,
640                         struct megasas_register_set __iomem *regs)
641 {
642         unsigned long flags;
643         spin_lock_irqsave(&instance->hba_lock, flags);
644         writel(upper_32_bits(frame_phys_addr),
645                &(regs)->inbound_high_queue_port);
646         writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
647                &(regs)->inbound_low_queue_port);
648         spin_unlock_irqrestore(&instance->hba_lock, flags);
649 }
650 
651 /**
652  * megasas_check_reset_skinny - For controller reset check
653  * @regs:                               MFI register set
654  */
655 static int
656 megasas_check_reset_skinny(struct megasas_instance *instance,
657                                 struct megasas_register_set __iomem *regs)
658 {
659         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
660                 return 1;
661 
662         return 0;
663 }
664 
665 static struct megasas_instance_template megasas_instance_template_skinny = {
666 
667         .fire_cmd = megasas_fire_cmd_skinny,
668         .enable_intr = megasas_enable_intr_skinny,
669         .disable_intr = megasas_disable_intr_skinny,
670         .clear_intr = megasas_clear_intr_skinny,
671         .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
672         .adp_reset = megasas_adp_reset_gen2,
673         .check_reset = megasas_check_reset_skinny,
674         .service_isr = megasas_isr,
675         .tasklet = megasas_complete_cmd_dpc,
676         .init_adapter = megasas_init_adapter_mfi,
677         .build_and_issue_cmd = megasas_build_and_issue_cmd,
678         .issue_dcmd = megasas_issue_dcmd,
679 };
680 
681 
682 /**
683 *       The following functions are defined for gen2 (deviceid : 0x78 0x79)
684 *       controllers
685 */
686 
687 /**
688  * megasas_enable_intr_gen2 -  Enables interrupts
689  * @regs:                      MFI register set
690  */
691 static inline void
692 megasas_enable_intr_gen2(struct megasas_instance *instance)
693 {
694         struct megasas_register_set __iomem *regs;
695         regs = instance->reg_set;
696         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
697 
698         /* write ~0x00000005 (4 & 1) to the intr mask*/
699         writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
700 
701         /* Dummy readl to force pci flush */
702         readl(&regs->outbound_intr_mask);
703 }
704 
705 /**
706  * megasas_disable_intr_gen2 - Disables interrupt
707  * @regs:                      MFI register set
708  */
709 static inline void
710 megasas_disable_intr_gen2(struct megasas_instance *instance)
711 {
712         struct megasas_register_set __iomem *regs;
713         u32 mask = 0xFFFFFFFF;
714         regs = instance->reg_set;
715         writel(mask, &regs->outbound_intr_mask);
716         /* Dummy readl to force pci flush */
717         readl(&regs->outbound_intr_mask);
718 }
719 
720 /**
721  * megasas_read_fw_status_reg_gen2 - returns the current FW status value
722  * @regs:                      MFI register set
723  */
724 static u32
725 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
726 {
727         return readl(&(regs)->outbound_scratch_pad);
728 }
729 
730 /**
731  * megasas_clear_interrupt_gen2 -      Check & clear interrupt
732  * @regs:                              MFI register set
733  */
734 static int
735 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
736 {
737         u32 status;
738         u32 mfiStatus = 0;
739         /*
740          * Check if it is our interrupt
741          */
742         status = readl(&regs->outbound_intr_status);
743 
744         if (status & MFI_INTR_FLAG_REPLY_MESSAGE) {
745                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
746         }
747         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
748                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
749         }
750 
751         /*
752          * Clear the interrupt by writing back the same value
753          */
754         if (mfiStatus)
755                 writel(status, &regs->outbound_doorbell_clear);
756 
757         /* Dummy readl to force pci flush */
758         readl(&regs->outbound_intr_status);
759 
760         return mfiStatus;
761 }
762 /**
763  * megasas_fire_cmd_gen2 -     Sends command to the FW
764  * @frame_phys_addr :          Physical address of cmd
765  * @frame_count :              Number of frames for the command
766  * @regs :                     MFI register set
767  */
768 static inline void
769 megasas_fire_cmd_gen2(struct megasas_instance *instance,
770                         dma_addr_t frame_phys_addr,
771                         u32 frame_count,
772                         struct megasas_register_set __iomem *regs)
773 {
774         unsigned long flags;
775         spin_lock_irqsave(&instance->hba_lock, flags);
776         writel((frame_phys_addr | (frame_count<<1))|1,
777                         &(regs)->inbound_queue_port);
778         spin_unlock_irqrestore(&instance->hba_lock, flags);
779 }
780 
781 /**
782  * megasas_adp_reset_gen2 -     For controller reset
783  * @regs:                               MFI register set
784  */
785 static int
786 megasas_adp_reset_gen2(struct megasas_instance *instance,
787                         struct megasas_register_set __iomem *reg_set)
788 {
789         u32                     retry = 0 ;
790         u32                     HostDiag;
791         u32                     *seq_offset = &reg_set->seq_offset;
792         u32                     *hostdiag_offset = &reg_set->host_diag;
793 
794         if (instance->instancet == &megasas_instance_template_skinny) {
795                 seq_offset = &reg_set->fusion_seq_offset;
796                 hostdiag_offset = &reg_set->fusion_host_diag;
797         }
798 
799         writel(0, seq_offset);
800         writel(4, seq_offset);
801         writel(0xb, seq_offset);
802         writel(2, seq_offset);
803         writel(7, seq_offset);
804         writel(0xd, seq_offset);
805 
806         msleep(1000);
807 
808         HostDiag = (u32)readl(hostdiag_offset);
809 
810         while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
811                 msleep(100);
812                 HostDiag = (u32)readl(hostdiag_offset);
813                 printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
814                                         retry, HostDiag);
815 
816                 if (retry++ >= 100)
817                         return 1;
818 
819         }
820 
821         printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
822 
823         writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
824 
825         ssleep(10);
826 
827         HostDiag = (u32)readl(hostdiag_offset);
828         while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
829                 msleep(100);
830                 HostDiag = (u32)readl(hostdiag_offset);
831                 printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
832                                 retry, HostDiag);
833 
834                 if (retry++ >= 1000)
835                         return 1;
836 
837         }
838         return 0;
839 }
840 
841 /**
842  * megasas_check_reset_gen2 -   For controller reset check
843  * @regs:                               MFI register set
844  */
845 static int
846 megasas_check_reset_gen2(struct megasas_instance *instance,
847                 struct megasas_register_set __iomem *regs)
848 {
849         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
850                 return 1;
851         }
852 
853         return 0;
854 }
855 
856 static struct megasas_instance_template megasas_instance_template_gen2 = {
857 
858         .fire_cmd = megasas_fire_cmd_gen2,
859         .enable_intr = megasas_enable_intr_gen2,
860         .disable_intr = megasas_disable_intr_gen2,
861         .clear_intr = megasas_clear_intr_gen2,
862         .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
863         .adp_reset = megasas_adp_reset_gen2,
864         .check_reset = megasas_check_reset_gen2,
865         .service_isr = megasas_isr,
866         .tasklet = megasas_complete_cmd_dpc,
867         .init_adapter = megasas_init_adapter_mfi,
868         .build_and_issue_cmd = megasas_build_and_issue_cmd,
869         .issue_dcmd = megasas_issue_dcmd,
870 };
871 
872 /**
873 *       This is the end of set of functions & definitions
874 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
875 */
876 
877 /*
878  * Template added for TB (Fusion)
879  */
880 extern struct megasas_instance_template megasas_instance_template_fusion;
881 
882 /**
883  * megasas_issue_polled -       Issues a polling command
884  * @instance:                   Adapter soft state
885  * @cmd:                        Command packet to be issued
886  *
887  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
888  */
889 int
890 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
891 {
892         int seconds;
893 
894         struct megasas_header *frame_hdr = &cmd->frame->hdr;
895 
896         frame_hdr->cmd_status = MFI_CMD_STATUS_POLL_MODE;
897         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
898 
899         /*
900          * Issue the frame using inbound queue port
901          */
902         instance->instancet->issue_dcmd(instance, cmd);
903 
904         /*
905          * Wait for cmd_status to change
906          */
907         if (instance->requestorId)
908                 seconds = MEGASAS_ROUTINE_WAIT_TIME_VF;
909         else
910                 seconds = MFI_POLL_TIMEOUT_SECS;
911         return wait_and_poll(instance, cmd, seconds);
912 }
913 
914 /**
915  * megasas_issue_blocked_cmd -  Synchronous wrapper around regular FW cmds
916  * @instance:                   Adapter soft state
917  * @cmd:                        Command to be issued
918  * @timeout:                    Timeout in seconds
919  *
920  * This function waits on an event for the command to be returned from ISR.
921  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
922  * Used to issue ioctl commands.
923  */
924 static int
925 megasas_issue_blocked_cmd(struct megasas_instance *instance,
926                           struct megasas_cmd *cmd, int timeout)
927 {
928         int ret = 0;
929         cmd->cmd_status = ENODATA;
930 
931         instance->instancet->issue_dcmd(instance, cmd);
932         if (timeout) {
933                 ret = wait_event_timeout(instance->int_cmd_wait_q,
934                                 cmd->cmd_status != ENODATA, timeout * HZ);
935                 if (!ret)
936                         return 1;
937         } else
938                 wait_event(instance->int_cmd_wait_q,
939                                 cmd->cmd_status != ENODATA);
940 
941         return 0;
942 }
943 
944 /**
945  * megasas_issue_blocked_abort_cmd -    Aborts previously issued cmd
946  * @instance:                           Adapter soft state
947  * @cmd_to_abort:                       Previously issued cmd to be aborted
948  * @timeout:                            Timeout in seconds
949  *
950  * MFI firmware can abort previously issued AEN comamnd (automatic event
951  * notification). The megasas_issue_blocked_abort_cmd() issues such abort
952  * cmd and waits for return status.
953  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
954  */
955 static int
956 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
957                                 struct megasas_cmd *cmd_to_abort, int timeout)
958 {
959         struct megasas_cmd *cmd;
960         struct megasas_abort_frame *abort_fr;
961         int ret = 0;
962 
963         cmd = megasas_get_cmd(instance);
964 
965         if (!cmd)
966                 return -1;
967 
968         abort_fr = &cmd->frame->abort;
969 
970         /*
971          * Prepare and issue the abort frame
972          */
973         abort_fr->cmd = MFI_CMD_ABORT;
974         abort_fr->cmd_status = 0xFF;
975         abort_fr->flags = cpu_to_le16(0);
976         abort_fr->abort_context = cpu_to_le32(cmd_to_abort->index);
977         abort_fr->abort_mfi_phys_addr_lo =
978                 cpu_to_le32(lower_32_bits(cmd_to_abort->frame_phys_addr));
979         abort_fr->abort_mfi_phys_addr_hi =
980                 cpu_to_le32(upper_32_bits(cmd_to_abort->frame_phys_addr));
981 
982         cmd->sync_cmd = 1;
983         cmd->cmd_status = 0xFF;
984 
985         instance->instancet->issue_dcmd(instance, cmd);
986 
987         if (timeout) {
988                 ret = wait_event_timeout(instance->abort_cmd_wait_q,
989                                 cmd->cmd_status != ENODATA, timeout * HZ);
990                 if (!ret) {
991                         dev_err(&instance->pdev->dev, "Command timedout"
992                                 "from %s\n", __func__);
993                         return 1;
994                 }
995         } else
996                 wait_event(instance->abort_cmd_wait_q,
997                                 cmd->cmd_status != ENODATA);
998 
999         cmd->sync_cmd = 0;
1000 
1001         megasas_return_cmd(instance, cmd);
1002         return 0;
1003 }
1004 
1005 /**
1006  * megasas_make_sgl32 - Prepares 32-bit SGL
1007  * @instance:           Adapter soft state
1008  * @scp:                SCSI command from the mid-layer
1009  * @mfi_sgl:            SGL to be filled in
1010  *
1011  * If successful, this function returns the number of SG elements. Otherwise,
1012  * it returnes -1.
1013  */
1014 static int
1015 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
1016                    union megasas_sgl *mfi_sgl)
1017 {
1018         int i;
1019         int sge_count;
1020         struct scatterlist *os_sgl;
1021 
1022         sge_count = scsi_dma_map(scp);
1023         BUG_ON(sge_count < 0);
1024 
1025         if (sge_count) {
1026                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1027                         mfi_sgl->sge32[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1028                         mfi_sgl->sge32[i].phys_addr = cpu_to_le32(sg_dma_address(os_sgl));
1029                 }
1030         }
1031         return sge_count;
1032 }
1033 
1034 /**
1035  * megasas_make_sgl64 - Prepares 64-bit SGL
1036  * @instance:           Adapter soft state
1037  * @scp:                SCSI command from the mid-layer
1038  * @mfi_sgl:            SGL to be filled in
1039  *
1040  * If successful, this function returns the number of SG elements. Otherwise,
1041  * it returnes -1.
1042  */
1043 static int
1044 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
1045                    union megasas_sgl *mfi_sgl)
1046 {
1047         int i;
1048         int sge_count;
1049         struct scatterlist *os_sgl;
1050 
1051         sge_count = scsi_dma_map(scp);
1052         BUG_ON(sge_count < 0);
1053 
1054         if (sge_count) {
1055                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1056                         mfi_sgl->sge64[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1057                         mfi_sgl->sge64[i].phys_addr = cpu_to_le64(sg_dma_address(os_sgl));
1058                 }
1059         }
1060         return sge_count;
1061 }
1062 
1063 /**
1064  * megasas_make_sgl_skinny - Prepares IEEE SGL
1065  * @instance:           Adapter soft state
1066  * @scp:                SCSI command from the mid-layer
1067  * @mfi_sgl:            SGL to be filled in
1068  *
1069  * If successful, this function returns the number of SG elements. Otherwise,
1070  * it returnes -1.
1071  */
1072 static int
1073 megasas_make_sgl_skinny(struct megasas_instance *instance,
1074                 struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
1075 {
1076         int i;
1077         int sge_count;
1078         struct scatterlist *os_sgl;
1079 
1080         sge_count = scsi_dma_map(scp);
1081 
1082         if (sge_count) {
1083                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1084                         mfi_sgl->sge_skinny[i].length =
1085                                 cpu_to_le32(sg_dma_len(os_sgl));
1086                         mfi_sgl->sge_skinny[i].phys_addr =
1087                                 cpu_to_le64(sg_dma_address(os_sgl));
1088                         mfi_sgl->sge_skinny[i].flag = cpu_to_le32(0);
1089                 }
1090         }
1091         return sge_count;
1092 }
1093 
1094  /**
1095  * megasas_get_frame_count - Computes the number of frames
1096  * @frame_type          : type of frame- io or pthru frame
1097  * @sge_count           : number of sg elements
1098  *
1099  * Returns the number of frames required for numnber of sge's (sge_count)
1100  */
1101 
1102 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1103                         u8 sge_count, u8 frame_type)
1104 {
1105         int num_cnt;
1106         int sge_bytes;
1107         u32 sge_sz;
1108         u32 frame_count=0;
1109 
1110         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1111             sizeof(struct megasas_sge32);
1112 
1113         if (instance->flag_ieee) {
1114                 sge_sz = sizeof(struct megasas_sge_skinny);
1115         }
1116 
1117         /*
1118          * Main frame can contain 2 SGEs for 64-bit SGLs and
1119          * 3 SGEs for 32-bit SGLs for ldio &
1120          * 1 SGEs for 64-bit SGLs and
1121          * 2 SGEs for 32-bit SGLs for pthru frame
1122          */
1123         if (unlikely(frame_type == PTHRU_FRAME)) {
1124                 if (instance->flag_ieee == 1) {
1125                         num_cnt = sge_count - 1;
1126                 } else if (IS_DMA64)
1127                         num_cnt = sge_count - 1;
1128                 else
1129                         num_cnt = sge_count - 2;
1130         } else {
1131                 if (instance->flag_ieee == 1) {
1132                         num_cnt = sge_count - 1;
1133                 } else if (IS_DMA64)
1134                         num_cnt = sge_count - 2;
1135                 else
1136                         num_cnt = sge_count - 3;
1137         }
1138 
1139         if(num_cnt>0){
1140                 sge_bytes = sge_sz * num_cnt;
1141 
1142                 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1143                     ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1144         }
1145         /* Main frame */
1146         frame_count +=1;
1147 
1148         if (frame_count > 7)
1149                 frame_count = 8;
1150         return frame_count;
1151 }
1152 
1153 /**
1154  * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
1155  * @instance:           Adapter soft state
1156  * @scp:                SCSI command
1157  * @cmd:                Command to be prepared in
1158  *
1159  * This function prepares CDB commands. These are typcially pass-through
1160  * commands to the devices.
1161  */
1162 static int
1163 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1164                    struct megasas_cmd *cmd)
1165 {
1166         u32 is_logical;
1167         u32 device_id;
1168         u16 flags = 0;
1169         struct megasas_pthru_frame *pthru;
1170 
1171         is_logical = MEGASAS_IS_LOGICAL(scp);
1172         device_id = MEGASAS_DEV_INDEX(instance, scp);
1173         pthru = (struct megasas_pthru_frame *)cmd->frame;
1174 
1175         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1176                 flags = MFI_FRAME_DIR_WRITE;
1177         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1178                 flags = MFI_FRAME_DIR_READ;
1179         else if (scp->sc_data_direction == PCI_DMA_NONE)
1180                 flags = MFI_FRAME_DIR_NONE;
1181 
1182         if (instance->flag_ieee == 1) {
1183                 flags |= MFI_FRAME_IEEE;
1184         }
1185 
1186         /*
1187          * Prepare the DCDB frame
1188          */
1189         pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1190         pthru->cmd_status = 0x0;
1191         pthru->scsi_status = 0x0;
1192         pthru->target_id = device_id;
1193         pthru->lun = scp->device->lun;
1194         pthru->cdb_len = scp->cmd_len;
1195         pthru->timeout = 0;
1196         pthru->pad_0 = 0;
1197         pthru->flags = cpu_to_le16(flags);
1198         pthru->data_xfer_len = cpu_to_le32(scsi_bufflen(scp));
1199 
1200         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1201 
1202         /*
1203         * If the command is for the tape device, set the
1204         * pthru timeout to the os layer timeout value.
1205         */
1206         if (scp->device->type == TYPE_TAPE) {
1207                 if ((scp->request->timeout / HZ) > 0xFFFF)
1208                         pthru->timeout = 0xFFFF;
1209                 else
1210                         pthru->timeout = cpu_to_le16(scp->request->timeout / HZ);
1211         }
1212 
1213         /*
1214          * Construct SGL
1215          */
1216         if (instance->flag_ieee == 1) {
1217                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1218                 pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1219                                                       &pthru->sgl);
1220         } else if (IS_DMA64) {
1221                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1222                 pthru->sge_count = megasas_make_sgl64(instance, scp,
1223                                                       &pthru->sgl);
1224         } else
1225                 pthru->sge_count = megasas_make_sgl32(instance, scp,
1226                                                       &pthru->sgl);
1227 
1228         if (pthru->sge_count > instance->max_num_sge) {
1229                 printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1230                         pthru->sge_count);
1231                 return 0;
1232         }
1233 
1234         /*
1235          * Sense info specific
1236          */
1237         pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1238         pthru->sense_buf_phys_addr_hi =
1239                 cpu_to_le32(upper_32_bits(cmd->sense_phys_addr));
1240         pthru->sense_buf_phys_addr_lo =
1241                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
1242 
1243         /*
1244          * Compute the total number of frames this command consumes. FW uses
1245          * this number to pull sufficient number of frames from host memory.
1246          */
1247         cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1248                                                         PTHRU_FRAME);
1249 
1250         return cmd->frame_count;
1251 }
1252 
1253 /**
1254  * megasas_build_ldio - Prepares IOs to logical devices
1255  * @instance:           Adapter soft state
1256  * @scp:                SCSI command
1257  * @cmd:                Command to be prepared
1258  *
1259  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1260  */
1261 static int
1262 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1263                    struct megasas_cmd *cmd)
1264 {
1265         u32 device_id;
1266         u8 sc = scp->cmnd[0];
1267         u16 flags = 0;
1268         struct megasas_io_frame *ldio;
1269 
1270         device_id = MEGASAS_DEV_INDEX(instance, scp);
1271         ldio = (struct megasas_io_frame *)cmd->frame;
1272 
1273         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1274                 flags = MFI_FRAME_DIR_WRITE;
1275         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1276                 flags = MFI_FRAME_DIR_READ;
1277 
1278         if (instance->flag_ieee == 1) {
1279                 flags |= MFI_FRAME_IEEE;
1280         }
1281 
1282         /*
1283          * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1284          */
1285         ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1286         ldio->cmd_status = 0x0;
1287         ldio->scsi_status = 0x0;
1288         ldio->target_id = device_id;
1289         ldio->timeout = 0;
1290         ldio->reserved_0 = 0;
1291         ldio->pad_0 = 0;
1292         ldio->flags = cpu_to_le16(flags);
1293         ldio->start_lba_hi = 0;
1294         ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1295 
1296         /*
1297          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1298          */
1299         if (scp->cmd_len == 6) {
1300                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[4]);
1301                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[1] << 16) |
1302                                                  ((u32) scp->cmnd[2] << 8) |
1303                                                  (u32) scp->cmnd[3]);
1304 
1305                 ldio->start_lba_lo &= cpu_to_le32(0x1FFFFF);
1306         }
1307 
1308         /*
1309          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1310          */
1311         else if (scp->cmd_len == 10) {
1312                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[8] |
1313                                               ((u32) scp->cmnd[7] << 8));
1314                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1315                                                  ((u32) scp->cmnd[3] << 16) |
1316                                                  ((u32) scp->cmnd[4] << 8) |
1317                                                  (u32) scp->cmnd[5]);
1318         }
1319 
1320         /*
1321          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1322          */
1323         else if (scp->cmd_len == 12) {
1324                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1325                                               ((u32) scp->cmnd[7] << 16) |
1326                                               ((u32) scp->cmnd[8] << 8) |
1327                                               (u32) scp->cmnd[9]);
1328 
1329                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1330                                                  ((u32) scp->cmnd[3] << 16) |
1331                                                  ((u32) scp->cmnd[4] << 8) |
1332                                                  (u32) scp->cmnd[5]);
1333         }
1334 
1335         /*
1336          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1337          */
1338         else if (scp->cmd_len == 16) {
1339                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[10] << 24) |
1340                                               ((u32) scp->cmnd[11] << 16) |
1341                                               ((u32) scp->cmnd[12] << 8) |
1342                                               (u32) scp->cmnd[13]);
1343 
1344                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1345                                                  ((u32) scp->cmnd[7] << 16) |
1346                                                  ((u32) scp->cmnd[8] << 8) |
1347                                                  (u32) scp->cmnd[9]);
1348 
1349                 ldio->start_lba_hi = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1350                                                  ((u32) scp->cmnd[3] << 16) |
1351                                                  ((u32) scp->cmnd[4] << 8) |
1352                                                  (u32) scp->cmnd[5]);
1353 
1354         }
1355 
1356         /*
1357          * Construct SGL
1358          */
1359         if (instance->flag_ieee) {
1360                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1361                 ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1362                                               &ldio->sgl);
1363         } else if (IS_DMA64) {
1364                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1365                 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1366         } else
1367                 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1368 
1369         if (ldio->sge_count > instance->max_num_sge) {
1370                 printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1371                         ldio->sge_count);
1372                 return 0;
1373         }
1374 
1375         /*
1376          * Sense info specific
1377          */
1378         ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1379         ldio->sense_buf_phys_addr_hi = 0;
1380         ldio->sense_buf_phys_addr_lo = cpu_to_le32(cmd->sense_phys_addr);
1381 
1382         /*
1383          * Compute the total number of frames this command consumes. FW uses
1384          * this number to pull sufficient number of frames from host memory.
1385          */
1386         cmd->frame_count = megasas_get_frame_count(instance,
1387                         ldio->sge_count, IO_FRAME);
1388 
1389         return cmd->frame_count;
1390 }
1391 
1392 /**
1393  * megasas_is_ldio -            Checks if the cmd is for logical drive
1394  * @scmd:                       SCSI command
1395  *
1396  * Called by megasas_queue_command to find out if the command to be queued
1397  * is a logical drive command
1398  */
1399 inline int megasas_is_ldio(struct scsi_cmnd *cmd)
1400 {
1401         if (!MEGASAS_IS_LOGICAL(cmd))
1402                 return 0;
1403         switch (cmd->cmnd[0]) {
1404         case READ_10:
1405         case WRITE_10:
1406         case READ_12:
1407         case WRITE_12:
1408         case READ_6:
1409         case WRITE_6:
1410         case READ_16:
1411         case WRITE_16:
1412                 return 1;
1413         default:
1414                 return 0;
1415         }
1416 }
1417 
1418  /**
1419  * megasas_dump_pending_frames -        Dumps the frame address of all pending cmds
1420  *                                      in FW
1421  * @instance:                           Adapter soft state
1422  */
1423 static inline void
1424 megasas_dump_pending_frames(struct megasas_instance *instance)
1425 {
1426         struct megasas_cmd *cmd;
1427         int i,n;
1428         union megasas_sgl *mfi_sgl;
1429         struct megasas_io_frame *ldio;
1430         struct megasas_pthru_frame *pthru;
1431         u32 sgcount;
1432         u32 max_cmd = instance->max_fw_cmds;
1433 
1434         printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1435         printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1436         if (IS_DMA64)
1437                 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1438         else
1439                 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1440 
1441         printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1442         for (i = 0; i < max_cmd; i++) {
1443                 cmd = instance->cmd_list[i];
1444                 if(!cmd->scmd)
1445                         continue;
1446                 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1447                 if (megasas_is_ldio(cmd->scmd)){
1448                         ldio = (struct megasas_io_frame *)cmd->frame;
1449                         mfi_sgl = &ldio->sgl;
1450                         sgcount = ldio->sge_count;
1451                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x,"
1452                         " lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1453                         instance->host->host_no, cmd->frame_count, ldio->cmd, ldio->target_id,
1454                         le32_to_cpu(ldio->start_lba_lo), le32_to_cpu(ldio->start_lba_hi),
1455                         le32_to_cpu(ldio->sense_buf_phys_addr_lo), sgcount);
1456                 }
1457                 else {
1458                         pthru = (struct megasas_pthru_frame *) cmd->frame;
1459                         mfi_sgl = &pthru->sgl;
1460                         sgcount = pthru->sge_count;
1461                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, "
1462                         "lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1463                         instance->host->host_no, cmd->frame_count, pthru->cmd, pthru->target_id,
1464                         pthru->lun, pthru->cdb_len, le32_to_cpu(pthru->data_xfer_len),
1465                         le32_to_cpu(pthru->sense_buf_phys_addr_lo), sgcount);
1466                 }
1467         if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1468                 for (n = 0; n < sgcount; n++){
1469                         if (IS_DMA64)
1470                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%llx ",
1471                                         le32_to_cpu(mfi_sgl->sge64[n].length),
1472                                         le64_to_cpu(mfi_sgl->sge64[n].phys_addr));
1473                         else
1474                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",
1475                                         le32_to_cpu(mfi_sgl->sge32[n].length),
1476                                         le32_to_cpu(mfi_sgl->sge32[n].phys_addr));
1477                         }
1478                 }
1479                 printk(KERN_ERR "\n");
1480         } /*for max_cmd*/
1481         printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1482         for (i = 0; i < max_cmd; i++) {
1483 
1484                 cmd = instance->cmd_list[i];
1485 
1486                 if(cmd->sync_cmd == 1){
1487                         printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1488                 }
1489         }
1490         printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1491 }
1492 
1493 u32
1494 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1495                             struct scsi_cmnd *scmd)
1496 {
1497         struct megasas_cmd *cmd;
1498         u32 frame_count;
1499 
1500         cmd = megasas_get_cmd(instance);
1501         if (!cmd)
1502                 return SCSI_MLQUEUE_HOST_BUSY;
1503 
1504         /*
1505          * Logical drive command
1506          */
1507         if (megasas_is_ldio(scmd))
1508                 frame_count = megasas_build_ldio(instance, scmd, cmd);
1509         else
1510                 frame_count = megasas_build_dcdb(instance, scmd, cmd);
1511 
1512         if (!frame_count)
1513                 goto out_return_cmd;
1514 
1515         cmd->scmd = scmd;
1516         scmd->SCp.ptr = (char *)cmd;
1517 
1518         /*
1519          * Issue the command to the FW
1520          */
1521         atomic_inc(&instance->fw_outstanding);
1522 
1523         instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1524                                 cmd->frame_count-1, instance->reg_set);
1525 
1526         return 0;
1527 out_return_cmd:
1528         megasas_return_cmd(instance, cmd);
1529         return 1;
1530 }
1531 
1532 
1533 /**
1534  * megasas_queue_command -      Queue entry point
1535  * @scmd:                       SCSI command to be queued
1536  * @done:                       Callback entry point
1537  */
1538 static int
1539 megasas_queue_command_lck(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
1540 {
1541         struct megasas_instance *instance;
1542         unsigned long flags;
1543 
1544         instance = (struct megasas_instance *)
1545             scmd->device->host->hostdata;
1546 
1547         if (instance->issuepend_done == 0)
1548                 return SCSI_MLQUEUE_HOST_BUSY;
1549 
1550         spin_lock_irqsave(&instance->hba_lock, flags);
1551 
1552         /* Check for an mpio path and adjust behavior */
1553         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
1554                 if (megasas_check_mpio_paths(instance, scmd) ==
1555                     (DID_RESET << 16)) {
1556                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1557                         return SCSI_MLQUEUE_HOST_BUSY;
1558                 } else {
1559                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1560                         scmd->result = DID_NO_CONNECT << 16;
1561                         done(scmd);
1562                         return 0;
1563                 }
1564         }
1565 
1566         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1567                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1568                 scmd->result = DID_NO_CONNECT << 16;
1569                 done(scmd);
1570                 return 0;
1571         }
1572 
1573         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1574                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1575                 return SCSI_MLQUEUE_HOST_BUSY;
1576         }
1577 
1578         spin_unlock_irqrestore(&instance->hba_lock, flags);
1579 
1580         scmd->scsi_done = done;
1581         scmd->result = 0;
1582 
1583         if (MEGASAS_IS_LOGICAL(scmd) &&
1584             (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
1585                 scmd->result = DID_BAD_TARGET << 16;
1586                 goto out_done;
1587         }
1588 
1589         switch (scmd->cmnd[0]) {
1590         case SYNCHRONIZE_CACHE:
1591                 /*
1592                  * FW takes care of flush cache on its own
1593                  * No need to send it down
1594                  */
1595                 scmd->result = DID_OK << 16;
1596                 goto out_done;
1597         default:
1598                 break;
1599         }
1600 
1601         if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1602                 printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1603                 return SCSI_MLQUEUE_HOST_BUSY;
1604         }
1605 
1606         return 0;
1607 
1608  out_done:
1609         done(scmd);
1610         return 0;
1611 }
1612 
1613 static DEF_SCSI_QCMD(megasas_queue_command)
1614 
1615 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1616 {
1617         int i;
1618 
1619         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1620 
1621                 if ((megasas_mgmt_info.instance[i]) &&
1622                     (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1623                         return megasas_mgmt_info.instance[i];
1624         }
1625 
1626         return NULL;
1627 }
1628 
1629 static int megasas_slave_configure(struct scsi_device *sdev)
1630 {
1631         u16             pd_index = 0;
1632         struct  megasas_instance *instance ;
1633 
1634         instance = megasas_lookup_instance(sdev->host->host_no);
1635 
1636         /*
1637         * Don't export physical disk devices to the disk driver.
1638         *
1639         * FIXME: Currently we don't export them to the midlayer at all.
1640         *        That will be fixed once LSI engineers have audited the
1641         *        firmware for possible issues.
1642         */
1643         if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
1644                                 sdev->type == TYPE_DISK) {
1645                 pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1646                                                                 sdev->id;
1647                 if (instance->pd_list[pd_index].driveState ==
1648                                                 MR_PD_STATE_SYSTEM) {
1649                         blk_queue_rq_timeout(sdev->request_queue,
1650                                 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1651                         return 0;
1652                 }
1653                 return -ENXIO;
1654         }
1655 
1656         /*
1657         * The RAID firmware may require extended timeouts.
1658         */
1659         blk_queue_rq_timeout(sdev->request_queue,
1660                 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1661         return 0;
1662 }
1663 
1664 static int megasas_slave_alloc(struct scsi_device *sdev)
1665 {
1666         u16             pd_index = 0;
1667         struct megasas_instance *instance ;
1668         instance = megasas_lookup_instance(sdev->host->host_no);
1669         if ((sdev->channel < MEGASAS_MAX_PD_CHANNELS) &&
1670                                 (sdev->type == TYPE_DISK)) {
1671                 /*
1672                  * Open the OS scan to the SYSTEM PD
1673                  */
1674                 pd_index =
1675                         (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1676                         sdev->id;
1677                 if ((instance->pd_list[pd_index].driveState ==
1678                                         MR_PD_STATE_SYSTEM) &&
1679                         (instance->pd_list[pd_index].driveType ==
1680                                                 TYPE_DISK)) {
1681                         return 0;
1682                 }
1683                 return -ENXIO;
1684         }
1685         return 0;
1686 }
1687 
1688 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1689 {
1690         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1691             (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1692             (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
1693             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
1694             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1695             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1696                 writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
1697                 /* Flush */
1698                 readl(&instance->reg_set->doorbell);
1699                 if (instance->mpio && instance->requestorId)
1700                         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
1701         } else {
1702                 writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
1703         }
1704 }
1705 
1706  /**
1707   * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1708   *                                     restored to max value
1709   * @instance:                  Adapter soft state
1710   *
1711   */
1712 void
1713 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1714 {
1715         unsigned long flags;
1716         if (instance->flag & MEGASAS_FW_BUSY
1717             && time_after(jiffies, instance->last_time + 5 * HZ)
1718             && atomic_read(&instance->fw_outstanding) <
1719             instance->throttlequeuedepth + 1) {
1720 
1721                 spin_lock_irqsave(instance->host->host_lock, flags);
1722                 instance->flag &= ~MEGASAS_FW_BUSY;
1723                 if (instance->is_imr) {
1724                         instance->host->can_queue =
1725                                 instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
1726                 } else
1727                         instance->host->can_queue =
1728                                 instance->max_fw_cmds - MEGASAS_INT_CMDS;
1729 
1730                 spin_unlock_irqrestore(instance->host->host_lock, flags);
1731         }
1732 }
1733 
1734 /**
1735  * megasas_complete_cmd_dpc      -      Returns FW's controller structure
1736  * @instance_addr:                      Address of adapter soft state
1737  *
1738  * Tasklet to complete cmds
1739  */
1740 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1741 {
1742         u32 producer;
1743         u32 consumer;
1744         u32 context;
1745         struct megasas_cmd *cmd;
1746         struct megasas_instance *instance =
1747                                 (struct megasas_instance *)instance_addr;
1748         unsigned long flags;
1749 
1750         /* If we have already declared adapter dead, donot complete cmds */
1751         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1752                 return;
1753 
1754         spin_lock_irqsave(&instance->completion_lock, flags);
1755 
1756         producer = le32_to_cpu(*instance->producer);
1757         consumer = le32_to_cpu(*instance->consumer);
1758 
1759         while (consumer != producer) {
1760                 context = le32_to_cpu(instance->reply_queue[consumer]);
1761                 if (context >= instance->max_fw_cmds) {
1762                         printk(KERN_ERR "Unexpected context value %x\n",
1763                                 context);
1764                         BUG();
1765                 }
1766 
1767                 cmd = instance->cmd_list[context];
1768 
1769                 megasas_complete_cmd(instance, cmd, DID_OK);
1770 
1771                 consumer++;
1772                 if (consumer == (instance->max_fw_cmds + 1)) {
1773                         consumer = 0;
1774                 }
1775         }
1776 
1777         *instance->consumer = cpu_to_le32(producer);
1778 
1779         spin_unlock_irqrestore(&instance->completion_lock, flags);
1780 
1781         /*
1782          * Check if we can restore can_queue
1783          */
1784         megasas_check_and_restore_queue_depth(instance);
1785 }
1786 
1787 /**
1788  * megasas_start_timer - Initializes a timer object
1789  * @instance:           Adapter soft state
1790  * @timer:              timer object to be initialized
1791  * @fn:                 timer function
1792  * @interval:           time interval between timer function call
1793  *
1794  */
1795 void megasas_start_timer(struct megasas_instance *instance,
1796                         struct timer_list *timer,
1797                         void *fn, unsigned long interval)
1798 {
1799         init_timer(timer);
1800         timer->expires = jiffies + interval;
1801         timer->data = (unsigned long)instance;
1802         timer->function = fn;
1803         add_timer(timer);
1804 }
1805 
1806 static void
1807 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1808 
1809 static void
1810 process_fw_state_change_wq(struct work_struct *work);
1811 
1812 void megasas_do_ocr(struct megasas_instance *instance)
1813 {
1814         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1815         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1816         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1817                 *instance->consumer = cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
1818         }
1819         instance->instancet->disable_intr(instance);
1820         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
1821         instance->issuepend_done = 0;
1822 
1823         atomic_set(&instance->fw_outstanding, 0);
1824         megasas_internal_reset_defer_cmds(instance);
1825         process_fw_state_change_wq(&instance->work_init);
1826 }
1827 
1828 /* This function will get the current SR-IOV LD/VF affiliation */
1829 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
1830         int initial)
1831 {
1832         struct megasas_cmd *cmd;
1833         struct megasas_dcmd_frame *dcmd;
1834         struct MR_LD_VF_AFFILIATION *new_affiliation = NULL;
1835         struct MR_LD_VF_AFFILIATION_111 *new_affiliation_111 = NULL;
1836         struct MR_LD_VF_MAP *newmap = NULL, *savedmap = NULL;
1837         dma_addr_t new_affiliation_h;
1838         dma_addr_t new_affiliation_111_h;
1839         int ld, retval = 0;
1840         u8 thisVf;
1841 
1842         cmd = megasas_get_cmd(instance);
1843 
1844         if (!cmd) {
1845                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_"
1846                        "affiliation: Failed to get cmd for scsi%d.\n",
1847                         instance->host->host_no);
1848                 return -ENOMEM;
1849         }
1850 
1851         dcmd = &cmd->frame->dcmd;
1852 
1853         if (!instance->vf_affiliation && !instance->vf_affiliation_111) {
1854                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1855                        "affiliation for scsi%d.\n", instance->host->host_no);
1856                 megasas_return_cmd(instance, cmd);
1857                 return -ENOMEM;
1858         }
1859 
1860         if (initial)
1861                 if (instance->PlasmaFW111)
1862                         memset(instance->vf_affiliation_111, 0,
1863                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1864                 else
1865                         memset(instance->vf_affiliation, 0,
1866                                (MAX_LOGICAL_DRIVES + 1) *
1867                                sizeof(struct MR_LD_VF_AFFILIATION));
1868         else {
1869                 if (instance->PlasmaFW111)
1870                         new_affiliation_111 =
1871                                 pci_alloc_consistent(instance->pdev,
1872                                                      sizeof(struct MR_LD_VF_AFFILIATION_111),
1873                                                      &new_affiliation_111_h);
1874                 else
1875                         new_affiliation =
1876                                 pci_alloc_consistent(instance->pdev,
1877                                                      (MAX_LOGICAL_DRIVES + 1) *
1878                                                      sizeof(struct MR_LD_VF_AFFILIATION),
1879                                                      &new_affiliation_h);
1880                 if (!new_affiliation && !new_affiliation_111) {
1881                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1882                                "memory for new affiliation for scsi%d.\n",
1883                                 instance->host->host_no);
1884                         megasas_return_cmd(instance, cmd);
1885                         return -ENOMEM;
1886                 }
1887                 if (instance->PlasmaFW111)
1888                         memset(new_affiliation_111, 0,
1889                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1890                 else
1891                         memset(new_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
1892                                sizeof(struct MR_LD_VF_AFFILIATION));
1893         }
1894 
1895         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1896 
1897         dcmd->cmd = MFI_CMD_DCMD;
1898         dcmd->cmd_status = 0xFF;
1899         dcmd->sge_count = 1;
1900         dcmd->flags = MFI_FRAME_DIR_BOTH;
1901         dcmd->timeout = 0;
1902         dcmd->pad_0 = 0;
1903         if (instance->PlasmaFW111) {
1904                 dcmd->data_xfer_len = sizeof(struct MR_LD_VF_AFFILIATION_111);
1905                 dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS_111;
1906         } else {
1907                 dcmd->data_xfer_len = (MAX_LOGICAL_DRIVES + 1) *
1908                         sizeof(struct MR_LD_VF_AFFILIATION);
1909                 dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS;
1910         }
1911 
1912         if (initial) {
1913                 if (instance->PlasmaFW111)
1914                         dcmd->sgl.sge32[0].phys_addr =
1915                           instance->vf_affiliation_111_h;
1916                 else
1917                         dcmd->sgl.sge32[0].phys_addr =
1918                           instance->vf_affiliation_h;
1919         } else {
1920                 if (instance->PlasmaFW111)
1921                         dcmd->sgl.sge32[0].phys_addr = new_affiliation_111_h;
1922                 else
1923                         dcmd->sgl.sge32[0].phys_addr = new_affiliation_h;
1924         }
1925         if (instance->PlasmaFW111)
1926                 dcmd->sgl.sge32[0].length =
1927                   sizeof(struct MR_LD_VF_AFFILIATION_111);
1928         else
1929                 dcmd->sgl.sge32[0].length = (MAX_LOGICAL_DRIVES + 1) *
1930                         sizeof(struct MR_LD_VF_AFFILIATION);
1931 
1932         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
1933                "scsi%d\n", instance->host->host_no);
1934 
1935         megasas_issue_blocked_cmd(instance, cmd, 0);
1936 
1937         if (dcmd->cmd_status) {
1938                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
1939                        " failed with status 0x%x for scsi%d.\n",
1940                        dcmd->cmd_status, instance->host->host_no);
1941                 retval = 1; /* Do a scan if we couldn't get affiliation */
1942                 goto out;
1943         }
1944 
1945         if (!initial) {
1946                 if (instance->PlasmaFW111) {
1947                         if (!new_affiliation_111->vdCount) {
1948                                 printk(KERN_WARNING "megasas: SR-IOV: Got new "
1949                                        "LD/VF affiliation for passive path "
1950                                        "for scsi%d.\n",
1951                                         instance->host->host_no);
1952                                 retval = 1;
1953                                 goto out;
1954                         }
1955                         thisVf = new_affiliation_111->thisVf;
1956                         for (ld = 0 ; ld < new_affiliation_111->vdCount; ld++)
1957                                 if (instance->vf_affiliation_111->map[ld].policy[thisVf] != new_affiliation_111->map[ld].policy[thisVf]) {
1958                                         printk(KERN_WARNING "megasas: SR-IOV: "
1959                                                "Got new LD/VF affiliation "
1960                                                "for scsi%d.\n",
1961                                                 instance->host->host_no);
1962                                         memcpy(instance->vf_affiliation_111,
1963                                                new_affiliation_111,
1964                                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1965                                         retval = 1;
1966                                         goto out;
1967                                 }
1968                 } else {
1969                         if (!new_affiliation->ldCount) {
1970                                 printk(KERN_WARNING "megasas: SR-IOV: Got new "
1971                                        "LD/VF affiliation for passive "
1972                                        "path for scsi%d.\n",
1973                                        instance->host->host_no);
1974                                 retval = 1;
1975                                 goto out;
1976                         }
1977                         newmap = new_affiliation->map;
1978                         savedmap = instance->vf_affiliation->map;
1979                         thisVf = new_affiliation->thisVf;
1980                         for (ld = 0 ; ld < new_affiliation->ldCount; ld++) {
1981                                 if (savedmap->policy[thisVf] !=
1982                                     newmap->policy[thisVf]) {
1983                                         printk(KERN_WARNING "megasas: SR-IOV: "
1984                                                "Got new LD/VF affiliation "
1985                                                "for scsi%d.\n",
1986                                                 instance->host->host_no);
1987                                         memcpy(instance->vf_affiliation,
1988                                                new_affiliation,
1989                                                new_affiliation->size);
1990                                         retval = 1;
1991                                         goto out;
1992                                 }
1993                                 savedmap = (struct MR_LD_VF_MAP *)
1994                                         ((unsigned char *)savedmap +
1995                                          savedmap->size);
1996                                 newmap = (struct MR_LD_VF_MAP *)
1997                                         ((unsigned char *)newmap +
1998                                          newmap->size);
1999                         }
2000                 }
2001         }
2002 out:
2003         if (new_affiliation) {
2004                 if (instance->PlasmaFW111)
2005                         pci_free_consistent(instance->pdev,
2006                                             sizeof(struct MR_LD_VF_AFFILIATION_111),
2007                                             new_affiliation_111,
2008                                             new_affiliation_111_h);
2009                 else
2010                         pci_free_consistent(instance->pdev,
2011                                             (MAX_LOGICAL_DRIVES + 1) *
2012                                             sizeof(struct MR_LD_VF_AFFILIATION),
2013                                             new_affiliation, new_affiliation_h);
2014         }
2015         megasas_return_cmd(instance, cmd);
2016 
2017         return retval;
2018 }
2019 
2020 /* This function will tell FW to start the SR-IOV heartbeat */
2021 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
2022                                          int initial)
2023 {
2024         struct megasas_cmd *cmd;
2025         struct megasas_dcmd_frame *dcmd;
2026         int retval = 0;
2027 
2028         cmd = megasas_get_cmd(instance);
2029 
2030         if (!cmd) {
2031                 printk(KERN_DEBUG "megasas: megasas_sriov_start_heartbeat: "
2032                        "Failed to get cmd for scsi%d.\n",
2033                        instance->host->host_no);
2034                 return -ENOMEM;
2035         }
2036 
2037         dcmd = &cmd->frame->dcmd;
2038 
2039         if (initial) {
2040                 instance->hb_host_mem =
2041                         pci_alloc_consistent(instance->pdev,
2042                                              sizeof(struct MR_CTRL_HB_HOST_MEM),
2043                                              &instance->hb_host_mem_h);
2044                 if (!instance->hb_host_mem) {
2045                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate"
2046                                " memory for heartbeat host memory for "
2047                                "scsi%d.\n", instance->host->host_no);
2048                         retval = -ENOMEM;
2049                         goto out;
2050                 }
2051                 memset(instance->hb_host_mem, 0,
2052                        sizeof(struct MR_CTRL_HB_HOST_MEM));
2053         }
2054 
2055         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2056 
2057         dcmd->mbox.s[0] = sizeof(struct MR_CTRL_HB_HOST_MEM);
2058         dcmd->cmd = MFI_CMD_DCMD;
2059         dcmd->cmd_status = 0xFF;
2060         dcmd->sge_count = 1;
2061         dcmd->flags = MFI_FRAME_DIR_BOTH;
2062         dcmd->timeout = 0;
2063         dcmd->pad_0 = 0;
2064         dcmd->data_xfer_len = sizeof(struct MR_CTRL_HB_HOST_MEM);
2065         dcmd->opcode = MR_DCMD_CTRL_SHARED_HOST_MEM_ALLOC;
2066         dcmd->sgl.sge32[0].phys_addr = instance->hb_host_mem_h;
2067         dcmd->sgl.sge32[0].length = sizeof(struct MR_CTRL_HB_HOST_MEM);
2068 
2069         printk(KERN_WARNING "megasas: SR-IOV: Starting heartbeat for scsi%d\n",
2070                instance->host->host_no);
2071 
2072         if (!megasas_issue_polled(instance, cmd)) {
2073                 retval = 0;
2074         } else {
2075                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2076                        "_MEM_ALLOC DCMD timed out for scsi%d\n",
2077                        instance->host->host_no);
2078                 retval = 1;
2079                 goto out;
2080         }
2081 
2082 
2083         if (dcmd->cmd_status) {
2084                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2085                        "_MEM_ALLOC DCMD failed with status 0x%x for scsi%d\n",
2086                        dcmd->cmd_status,
2087                        instance->host->host_no);
2088                 retval = 1;
2089                 goto out;
2090         }
2091 
2092 out:
2093         megasas_return_cmd(instance, cmd);
2094 
2095         return retval;
2096 }
2097 
2098 /* Handler for SR-IOV heartbeat */
2099 void megasas_sriov_heartbeat_handler(unsigned long instance_addr)
2100 {
2101         struct megasas_instance *instance =
2102                 (struct megasas_instance *)instance_addr;
2103 
2104         if (instance->hb_host_mem->HB.fwCounter !=
2105             instance->hb_host_mem->HB.driverCounter) {
2106                 instance->hb_host_mem->HB.driverCounter =
2107                         instance->hb_host_mem->HB.fwCounter;
2108                 mod_timer(&instance->sriov_heartbeat_timer,
2109                           jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2110         } else {
2111                 printk(KERN_WARNING "megasas: SR-IOV: Heartbeat never "
2112                        "completed for scsi%d\n", instance->host->host_no);
2113                 schedule_work(&instance->work_init);
2114         }
2115 }
2116 
2117 /**
2118  * megasas_wait_for_outstanding -       Wait for all outstanding cmds
2119  * @instance:                           Adapter soft state
2120  *
2121  * This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
2122  * complete all its outstanding commands. Returns error if one or more IOs
2123  * are pending after this time period. It also marks the controller dead.
2124  */
2125 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
2126 {
2127         int i;
2128         u32 reset_index;
2129         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
2130         u8 adprecovery;
2131         unsigned long flags;
2132         struct list_head clist_local;
2133         struct megasas_cmd *reset_cmd;
2134         u32 fw_state;
2135         u8 kill_adapter_flag;
2136 
2137         spin_lock_irqsave(&instance->hba_lock, flags);
2138         adprecovery = instance->adprecovery;
2139         spin_unlock_irqrestore(&instance->hba_lock, flags);
2140 
2141         if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2142 
2143                 INIT_LIST_HEAD(&clist_local);
2144                 spin_lock_irqsave(&instance->hba_lock, flags);
2145                 list_splice_init(&instance->internal_reset_pending_q,
2146                                 &clist_local);
2147                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2148 
2149                 printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
2150                 for (i = 0; i < wait_time; i++) {
2151                         msleep(1000);
2152                         spin_lock_irqsave(&instance->hba_lock, flags);
2153                         adprecovery = instance->adprecovery;
2154                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2155                         if (adprecovery == MEGASAS_HBA_OPERATIONAL)
2156                                 break;
2157                 }
2158 
2159                 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2160                         printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
2161                         spin_lock_irqsave(&instance->hba_lock, flags);
2162                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2163                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2164                         return FAILED;
2165                 }
2166 
2167                 reset_index     = 0;
2168                 while (!list_empty(&clist_local)) {
2169                         reset_cmd       = list_entry((&clist_local)->next,
2170                                                 struct megasas_cmd, list);
2171                         list_del_init(&reset_cmd->list);
2172                         if (reset_cmd->scmd) {
2173                                 reset_cmd->scmd->result = DID_RESET << 16;
2174                                 printk(KERN_NOTICE "%d:%p reset [%02x]\n",
2175                                         reset_index, reset_cmd,
2176                                         reset_cmd->scmd->cmnd[0]);
2177 
2178                                 reset_cmd->scmd->scsi_done(reset_cmd->scmd);
2179                                 megasas_return_cmd(instance, reset_cmd);
2180                         } else if (reset_cmd->sync_cmd) {
2181                                 printk(KERN_NOTICE "megasas:%p synch cmds"
2182                                                 "reset queue\n",
2183                                                 reset_cmd);
2184 
2185                                 reset_cmd->cmd_status = ENODATA;
2186                                 instance->instancet->fire_cmd(instance,
2187                                                 reset_cmd->frame_phys_addr,
2188                                                 0, instance->reg_set);
2189                         } else {
2190                                 printk(KERN_NOTICE "megasas: %p unexpected"
2191                                         "cmds lst\n",
2192                                         reset_cmd);
2193                         }
2194                         reset_index++;
2195                 }
2196 
2197                 return SUCCESS;
2198         }
2199 
2200         for (i = 0; i < resetwaittime; i++) {
2201 
2202                 int outstanding = atomic_read(&instance->fw_outstanding);
2203 
2204                 if (!outstanding)
2205                         break;
2206 
2207                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2208                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2209                                "commands to complete\n",i,outstanding);
2210                         /*
2211                          * Call cmd completion routine. Cmd to be
2212                          * be completed directly without depending on isr.
2213                          */
2214                         megasas_complete_cmd_dpc((unsigned long)instance);
2215                 }
2216 
2217                 msleep(1000);
2218         }
2219 
2220         i = 0;
2221         kill_adapter_flag = 0;
2222         do {
2223                 fw_state = instance->instancet->read_fw_status_reg(
2224                                         instance->reg_set) & MFI_STATE_MASK;
2225                 if ((fw_state == MFI_STATE_FAULT) &&
2226                         (instance->disableOnlineCtrlReset == 0)) {
2227                         if (i == 3) {
2228                                 kill_adapter_flag = 2;
2229                                 break;
2230                         }
2231                         megasas_do_ocr(instance);
2232                         kill_adapter_flag = 1;
2233 
2234                         /* wait for 1 secs to let FW finish the pending cmds */
2235                         msleep(1000);
2236                 }
2237                 i++;
2238         } while (i <= 3);
2239 
2240         if (atomic_read(&instance->fw_outstanding) &&
2241                                         !kill_adapter_flag) {
2242                 if (instance->disableOnlineCtrlReset == 0) {
2243 
2244                         megasas_do_ocr(instance);
2245 
2246                         /* wait for 5 secs to let FW finish the pending cmds */
2247                         for (i = 0; i < wait_time; i++) {
2248                                 int outstanding =
2249                                         atomic_read(&instance->fw_outstanding);
2250                                 if (!outstanding)
2251                                         return SUCCESS;
2252                                 msleep(1000);
2253                         }
2254                 }
2255         }
2256 
2257         if (atomic_read(&instance->fw_outstanding) ||
2258                                         (kill_adapter_flag == 2)) {
2259                 printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
2260                 /*
2261                 * Send signal to FW to stop processing any pending cmds.
2262                 * The controller will be taken offline by the OS now.
2263                 */
2264                 if ((instance->pdev->device ==
2265                         PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2266                         (instance->pdev->device ==
2267                         PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
2268                         writel(MFI_STOP_ADP,
2269                                 &instance->reg_set->doorbell);
2270                 } else {
2271                         writel(MFI_STOP_ADP,
2272                                 &instance->reg_set->inbound_doorbell);
2273                 }
2274                 megasas_dump_pending_frames(instance);
2275                 spin_lock_irqsave(&instance->hba_lock, flags);
2276                 instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2277                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2278                 return FAILED;
2279         }
2280 
2281         printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
2282 
2283         return SUCCESS;
2284 }
2285 
2286 /**
2287  * megasas_generic_reset -      Generic reset routine
2288  * @scmd:                       Mid-layer SCSI command
2289  *
2290  * This routine implements a generic reset handler for device, bus and host
2291  * reset requests. Device, bus and host specific reset handlers can use this
2292  * function after they do their specific tasks.
2293  */
2294 static int megasas_generic_reset(struct scsi_cmnd *scmd)
2295 {
2296         int ret_val;
2297         struct megasas_instance *instance;
2298 
2299         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2300 
2301         scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
2302                  scmd->cmnd[0], scmd->retries);
2303 
2304         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2305                 printk(KERN_ERR "megasas: cannot recover from previous reset "
2306                        "failures\n");
2307                 return FAILED;
2308         }
2309 
2310         ret_val = megasas_wait_for_outstanding(instance);
2311         if (ret_val == SUCCESS)
2312                 printk(KERN_NOTICE "megasas: reset successful \n");
2313         else
2314                 printk(KERN_ERR "megasas: failed to do reset\n");
2315 
2316         return ret_val;
2317 }
2318 
2319 /**
2320  * megasas_reset_timer - quiesce the adapter if required
2321  * @scmd:               scsi cmnd
2322  *
2323  * Sets the FW busy flag and reduces the host->can_queue if the
2324  * cmd has not been completed within the timeout period.
2325  */
2326 static enum
2327 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
2328 {
2329         struct megasas_instance *instance;
2330         unsigned long flags;
2331 
2332         if (time_after(jiffies, scmd->jiffies_at_alloc +
2333                                 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
2334                 return BLK_EH_NOT_HANDLED;
2335         }
2336 
2337         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2338         if (!(instance->flag & MEGASAS_FW_BUSY)) {
2339                 /* FW is busy, throttle IO */
2340                 spin_lock_irqsave(instance->host->host_lock, flags);
2341 
2342                 instance->host->can_queue = instance->throttlequeuedepth;
2343                 instance->last_time = jiffies;
2344                 instance->flag |= MEGASAS_FW_BUSY;
2345 
2346                 spin_unlock_irqrestore(instance->host->host_lock, flags);
2347         }
2348         return BLK_EH_RESET_TIMER;
2349 }
2350 
2351 /**
2352  * megasas_reset_device -       Device reset handler entry point
2353  */
2354 static int megasas_reset_device(struct scsi_cmnd *scmd)
2355 {
2356         int ret;
2357 
2358         /*
2359          * First wait for all commands to complete
2360          */
2361         ret = megasas_generic_reset(scmd);
2362 
2363         return ret;
2364 }
2365 
2366 /**
2367  * megasas_reset_bus_host -     Bus & host reset handler entry point
2368  */
2369 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
2370 {
2371         int ret;
2372         struct megasas_instance *instance;
2373         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2374 
2375         /*
2376          * First wait for all commands to complete
2377          */
2378         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
2379             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
2380             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2381             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
2382                 ret = megasas_reset_fusion(scmd->device->host, 1);
2383         else
2384                 ret = megasas_generic_reset(scmd);
2385 
2386         return ret;
2387 }
2388 
2389 /**
2390  * megasas_bios_param - Returns disk geometry for a disk
2391  * @sdev:               device handle
2392  * @bdev:               block device
2393  * @capacity:           drive capacity
2394  * @geom:               geometry parameters
2395  */
2396 static int
2397 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2398                  sector_t capacity, int geom[])
2399 {
2400         int heads;
2401         int sectors;
2402         sector_t cylinders;
2403         unsigned long tmp;
2404         /* Default heads (64) & sectors (32) */
2405         heads = 64;
2406         sectors = 32;
2407 
2408         tmp = heads * sectors;
2409         cylinders = capacity;
2410 
2411         sector_div(cylinders, tmp);
2412 
2413         /*
2414          * Handle extended translation size for logical drives > 1Gb
2415          */
2416 
2417         if (capacity >= 0x200000) {
2418                 heads = 255;
2419                 sectors = 63;
2420                 tmp = heads*sectors;
2421                 cylinders = capacity;
2422                 sector_div(cylinders, tmp);
2423         }
2424 
2425         geom[0] = heads;
2426         geom[1] = sectors;
2427         geom[2] = cylinders;
2428 
2429         return 0;
2430 }
2431 
2432 static void megasas_aen_polling(struct work_struct *work);
2433 
2434 /**
2435  * megasas_service_aen -        Processes an event notification
2436  * @instance:                   Adapter soft state
2437  * @cmd:                        AEN command completed by the ISR
2438  *
2439  * For AEN, driver sends a command down to FW that is held by the FW till an
2440  * event occurs. When an event of interest occurs, FW completes the command
2441  * that it was previously holding.
2442  *
2443  * This routines sends SIGIO signal to processes that have registered with the
2444  * driver for AEN.
2445  */
2446 static void
2447 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2448 {
2449         unsigned long flags;
2450         /*
2451          * Don't signal app if it is just an aborted previously registered aen
2452          */
2453         if ((!cmd->abort_aen) && (instance->unload == 0)) {
2454                 spin_lock_irqsave(&poll_aen_lock, flags);
2455                 megasas_poll_wait_aen = 1;
2456                 spin_unlock_irqrestore(&poll_aen_lock, flags);
2457                 wake_up(&megasas_poll_wait);
2458                 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2459         }
2460         else
2461                 cmd->abort_aen = 0;
2462 
2463         instance->aen_cmd = NULL;
2464         megasas_return_cmd(instance, cmd);
2465 
2466         if ((instance->unload == 0) &&
2467                 ((instance->issuepend_done == 1))) {
2468                 struct megasas_aen_event *ev;
2469                 ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2470                 if (!ev) {
2471                         printk(KERN_ERR "megasas_service_aen: out of memory\n");
2472                 } else {
2473                         ev->instance = instance;
2474                         instance->ev = ev;
2475                         INIT_DELAYED_WORK(&ev->hotplug_work,
2476                                           megasas_aen_polling);
2477                         schedule_delayed_work(&ev->hotplug_work, 0);
2478                 }
2479         }
2480 }
2481 
2482 static int megasas_change_queue_depth(struct scsi_device *sdev,
2483                                       int queue_depth, int reason)
2484 {
2485         if (reason != SCSI_QDEPTH_DEFAULT)
2486                 return -EOPNOTSUPP;
2487 
2488         if (queue_depth > sdev->host->can_queue)
2489                 queue_depth = sdev->host->can_queue;
2490         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
2491                                 queue_depth);
2492 
2493         return queue_depth;
2494 }
2495 
2496 /*
2497  * Scsi host template for megaraid_sas driver
2498  */
2499 static struct scsi_host_template megasas_template = {
2500 
2501         .module = THIS_MODULE,
2502         .name = "LSI SAS based MegaRAID driver",
2503         .proc_name = "megaraid_sas",
2504         .slave_configure = megasas_slave_configure,
2505         .slave_alloc = megasas_slave_alloc,
2506         .queuecommand = megasas_queue_command,
2507         .eh_device_reset_handler = megasas_reset_device,
2508         .eh_bus_reset_handler = megasas_reset_bus_host,
2509         .eh_host_reset_handler = megasas_reset_bus_host,
2510         .eh_timed_out = megasas_reset_timer,
2511         .bios_param = megasas_bios_param,
2512         .use_clustering = ENABLE_CLUSTERING,
2513         .change_queue_depth = megasas_change_queue_depth,
2514         .no_write_same = 1,
2515 };
2516 
2517 /**
2518  * megasas_complete_int_cmd -   Completes an internal command
2519  * @instance:                   Adapter soft state
2520  * @cmd:                        Command to be completed
2521  *
2522  * The megasas_issue_blocked_cmd() function waits for a command to complete
2523  * after it issues a command. This function wakes up that waiting routine by
2524  * calling wake_up() on the wait queue.
2525  */
2526 static void
2527 megasas_complete_int_cmd(struct megasas_instance *instance,
2528                          struct megasas_cmd *cmd)
2529 {
2530         cmd->cmd_status = cmd->frame->io.cmd_status;
2531 
2532         if (cmd->cmd_status == ENODATA) {
2533                 cmd->cmd_status = 0;
2534         }
2535         wake_up(&instance->int_cmd_wait_q);
2536 }
2537 
2538 /**
2539  * megasas_complete_abort -     Completes aborting a command
2540  * @instance:                   Adapter soft state
2541  * @cmd:                        Cmd that was issued to abort another cmd
2542  *
2543  * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2544  * after it issues an abort on a previously issued command. This function
2545  * wakes up all functions waiting on the same wait queue.
2546  */
2547 static void
2548 megasas_complete_abort(struct megasas_instance *instance,
2549                        struct megasas_cmd *cmd)
2550 {
2551         if (cmd->sync_cmd) {
2552                 cmd->sync_cmd = 0;
2553                 cmd->cmd_status = 0;
2554                 wake_up(&instance->abort_cmd_wait_q);
2555         }
2556 
2557         return;
2558 }
2559 
2560 /**
2561  * megasas_complete_cmd -       Completes a command
2562  * @instance:                   Adapter soft state
2563  * @cmd:                        Command to be completed
2564  * @alt_status:                 If non-zero, use this value as status to
2565  *                              SCSI mid-layer instead of the value returned
2566  *                              by the FW. This should be used if caller wants
2567  *                              an alternate status (as in the case of aborted
2568  *                              commands)
2569  */
2570 void
2571 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2572                      u8 alt_status)
2573 {
2574         int exception = 0;
2575         struct megasas_header *hdr = &cmd->frame->hdr;
2576         unsigned long flags;
2577         struct fusion_context *fusion = instance->ctrl_context;
2578         u32 opcode;
2579 
2580         /* flag for the retry reset */
2581         cmd->retry_for_fw_reset = 0;
2582 
2583         if (cmd->scmd)
2584                 cmd->scmd->SCp.ptr = NULL;
2585 
2586         switch (hdr->cmd) {
2587         case MFI_CMD_INVALID:
2588                 /* Some older 1068 controller FW may keep a pended
2589                    MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
2590                    when booting the kdump kernel.  Ignore this command to
2591                    prevent a kernel panic on shutdown of the kdump kernel. */
2592                 printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command "
2593                        "completed.\n");
2594                 printk(KERN_WARNING "megaraid_sas: If you have a controller "
2595                        "other than PERC5, please upgrade your firmware.\n");
2596                 break;
2597         case MFI_CMD_PD_SCSI_IO:
2598         case MFI_CMD_LD_SCSI_IO:
2599 
2600                 /*
2601                  * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2602                  * issued either through an IO path or an IOCTL path. If it
2603                  * was via IOCTL, we will send it to internal completion.
2604                  */
2605                 if (cmd->sync_cmd) {
2606                         cmd->sync_cmd = 0;
2607                         megasas_complete_int_cmd(instance, cmd);
2608                         break;
2609                 }
2610 
2611         case MFI_CMD_LD_READ:
2612         case MFI_CMD_LD_WRITE:
2613 
2614                 if (alt_status) {
2615                         cmd->scmd->result = alt_status << 16;
2616                         exception = 1;
2617                 }
2618 
2619                 if (exception) {
2620 
2621                         atomic_dec(&instance->fw_outstanding);
2622 
2623                         scsi_dma_unmap(cmd->scmd);
2624                         cmd->scmd->scsi_done(cmd->scmd);
2625                         megasas_return_cmd(instance, cmd);
2626 
2627                         break;
2628                 }
2629 
2630                 switch (hdr->cmd_status) {
2631 
2632                 case MFI_STAT_OK:
2633                         cmd->scmd->result = DID_OK << 16;
2634                         break;
2635 
2636                 case MFI_STAT_SCSI_IO_FAILED:
2637                 case MFI_STAT_LD_INIT_IN_PROGRESS:
2638                         cmd->scmd->result =
2639                             (DID_ERROR << 16) | hdr->scsi_status;
2640                         break;
2641 
2642                 case MFI_STAT_SCSI_DONE_WITH_ERROR:
2643 
2644                         cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2645 
2646                         if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2647                                 memset(cmd->scmd->sense_buffer, 0,
2648                                        SCSI_SENSE_BUFFERSIZE);
2649                                 memcpy(cmd->scmd->sense_buffer, cmd->sense,
2650                                        hdr->sense_len);
2651 
2652                                 cmd->scmd->result |= DRIVER_SENSE << 24;
2653                         }
2654 
2655                         break;
2656 
2657                 case MFI_STAT_LD_OFFLINE:
2658                 case MFI_STAT_DEVICE_NOT_FOUND:
2659                         cmd->scmd->result = DID_BAD_TARGET << 16;
2660                         break;
2661 
2662                 default:
2663                         printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2664                                hdr->cmd_status);
2665                         cmd->scmd->result = DID_ERROR << 16;
2666                         break;
2667                 }
2668 
2669                 atomic_dec(&instance->fw_outstanding);
2670 
2671                 scsi_dma_unmap(cmd->scmd);
2672                 cmd->scmd->scsi_done(cmd->scmd);
2673                 megasas_return_cmd(instance, cmd);
2674 
2675                 break;
2676 
2677         case MFI_CMD_SMP:
2678         case MFI_CMD_STP:
2679         case MFI_CMD_DCMD:
2680                 opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
2681                 /* Check for LD map update */
2682                 if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
2683                         && (cmd->frame->dcmd.mbox.b[1] == 1)) {
2684                         fusion->fast_path_io = 0;
2685                         spin_lock_irqsave(instance->host->host_lock, flags);
2686                         if (cmd->frame->hdr.cmd_status != 0) {
2687                                 if (cmd->frame->hdr.cmd_status !=
2688                                     MFI_STAT_NOT_FOUND)
2689                                         printk(KERN_WARNING "megasas: map sync"
2690                                                "failed, status = 0x%x.\n",
2691                                                cmd->frame->hdr.cmd_status);
2692                                 else {
2693                                         megasas_return_cmd(instance, cmd);
2694                                         spin_unlock_irqrestore(
2695                                                 instance->host->host_lock,
2696                                                 flags);
2697                                         break;
2698                                 }
2699                         } else
2700                                 instance->map_id++;
2701                         megasas_return_cmd(instance, cmd);
2702 
2703                         /*
2704                          * Set fast path IO to ZERO.
2705                          * Validate Map will set proper value.
2706                          * Meanwhile all IOs will go as LD IO.
2707                          */
2708                         if (MR_ValidateMapInfo(instance))
2709                                 fusion->fast_path_io = 1;
2710                         else
2711                                 fusion->fast_path_io = 0;
2712                         megasas_sync_map_info(instance);
2713                         spin_unlock_irqrestore(instance->host->host_lock,
2714                                                flags);
2715                         break;
2716                 }
2717                 if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
2718                     opcode == MR_DCMD_CTRL_EVENT_GET) {
2719                         spin_lock_irqsave(&poll_aen_lock, flags);
2720                         megasas_poll_wait_aen = 0;
2721                         spin_unlock_irqrestore(&poll_aen_lock, flags);
2722                 }
2723 
2724                 /*
2725                  * See if got an event notification
2726                  */
2727                 if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
2728                         megasas_service_aen(instance, cmd);
2729                 else
2730                         megasas_complete_int_cmd(instance, cmd);
2731 
2732                 break;
2733 
2734         case MFI_CMD_ABORT:
2735                 /*
2736                  * Cmd issued to abort another cmd returned
2737                  */
2738                 megasas_complete_abort(instance, cmd);
2739                 break;
2740 
2741         default:
2742                 printk("megasas: Unknown command completed! [0x%X]\n",
2743                        hdr->cmd);
2744                 break;
2745         }
2746 }
2747 
2748 /**
2749  * megasas_issue_pending_cmds_again -   issue all pending cmds
2750  *                                      in FW again because of the fw reset
2751  * @instance:                           Adapter soft state
2752  */
2753 static inline void
2754 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
2755 {
2756         struct megasas_cmd *cmd;
2757         struct list_head clist_local;
2758         union megasas_evt_class_locale class_locale;
2759         unsigned long flags;
2760         u32 seq_num;
2761 
2762         INIT_LIST_HEAD(&clist_local);
2763         spin_lock_irqsave(&instance->hba_lock, flags);
2764         list_splice_init(&instance->internal_reset_pending_q, &clist_local);
2765         spin_unlock_irqrestore(&instance->hba_lock, flags);
2766 
2767         while (!list_empty(&clist_local)) {
2768                 cmd     = list_entry((&clist_local)->next,
2769                                         struct megasas_cmd, list);
2770                 list_del_init(&cmd->list);
2771 
2772                 if (cmd->sync_cmd || cmd->scmd) {
2773                         printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
2774                                 "detected to be pending while HBA reset.\n",
2775                                         cmd, cmd->scmd, cmd->sync_cmd);
2776 
2777                         cmd->retry_for_fw_reset++;
2778 
2779                         if (cmd->retry_for_fw_reset == 3) {
2780                                 printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
2781                                         "was tried multiple times during reset."
2782                                         "Shutting down the HBA\n",
2783                                         cmd, cmd->scmd, cmd->sync_cmd);
2784                                 megaraid_sas_kill_hba(instance);
2785 
2786                                 instance->adprecovery =
2787                                                 MEGASAS_HW_CRITICAL_ERROR;
2788                                 return;
2789                         }
2790                 }
2791 
2792                 if (cmd->sync_cmd == 1) {
2793                         if (cmd->scmd) {
2794                                 printk(KERN_NOTICE "megaraid_sas: unexpected"
2795                                         "cmd attached to internal command!\n");
2796                         }
2797                         printk(KERN_NOTICE "megasas: %p synchronous cmd"
2798                                                 "on the internal reset queue,"
2799                                                 "issue it again.\n", cmd);
2800                         cmd->cmd_status = ENODATA;
2801                         instance->instancet->fire_cmd(instance,
2802                                                         cmd->frame_phys_addr ,
2803                                                         0, instance->reg_set);
2804                 } else if (cmd->scmd) {
2805                         printk(KERN_NOTICE "megasas: %p scsi cmd [%02x]"
2806                         "detected on the internal queue, issue again.\n",
2807                         cmd, cmd->scmd->cmnd[0]);
2808 
2809                         atomic_inc(&instance->fw_outstanding);
2810                         instance->instancet->fire_cmd(instance,
2811                                         cmd->frame_phys_addr,
2812                                         cmd->frame_count-1, instance->reg_set);
2813                 } else {
2814                         printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
2815                                 "internal reset defer list while re-issue!!\n",
2816                                 cmd);
2817                 }
2818         }
2819 
2820         if (instance->aen_cmd) {
2821                 printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
2822                 megasas_return_cmd(instance, instance->aen_cmd);
2823 
2824                 instance->aen_cmd       = NULL;
2825         }
2826 
2827         /*
2828         * Initiate AEN (Asynchronous Event Notification)
2829         */
2830         seq_num = instance->last_seq_num;
2831         class_locale.members.reserved = 0;
2832         class_locale.members.locale = MR_EVT_LOCALE_ALL;
2833         class_locale.members.class = MR_EVT_CLASS_DEBUG;
2834 
2835         megasas_register_aen(instance, seq_num, class_locale.word);
2836 }
2837 
2838 /**
2839  * Move the internal reset pending commands to a deferred queue.
2840  *
2841  * We move the commands pending at internal reset time to a
2842  * pending queue. This queue would be flushed after successful
2843  * completion of the internal reset sequence. if the internal reset
2844  * did not complete in time, the kernel reset handler would flush
2845  * these commands.
2846  **/
2847 static void
2848 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
2849 {
2850         struct megasas_cmd *cmd;
2851         int i;
2852         u32 max_cmd = instance->max_fw_cmds;
2853         u32 defer_index;
2854         unsigned long flags;
2855 
2856         defer_index     = 0;
2857         spin_lock_irqsave(&instance->cmd_pool_lock, flags);
2858         for (i = 0; i < max_cmd; i++) {
2859                 cmd = instance->cmd_list[i];
2860                 if (cmd->sync_cmd == 1 || cmd->scmd) {
2861                         printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
2862                                         "on the defer queue as internal\n",
2863                                 defer_index, cmd, cmd->sync_cmd, cmd->scmd);
2864 
2865                         if (!list_empty(&cmd->list)) {
2866                                 printk(KERN_NOTICE "megaraid_sas: ERROR while"
2867                                         " moving this cmd:%p, %d %p, it was"
2868                                         "discovered on some list?\n",
2869                                         cmd, cmd->sync_cmd, cmd->scmd);
2870 
2871                                 list_del_init(&cmd->list);
2872                         }
2873                         defer_index++;
2874                         list_add_tail(&cmd->list,
2875                                 &instance->internal_reset_pending_q);
2876                 }
2877         }
2878         spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
2879 }
2880 
2881 
2882 static void
2883 process_fw_state_change_wq(struct work_struct *work)
2884 {
2885         struct megasas_instance *instance =
2886                 container_of(work, struct megasas_instance, work_init);
2887         u32 wait;
2888         unsigned long flags;
2889 
2890         if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
2891                 printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
2892                                 instance->adprecovery);
2893                 return ;
2894         }
2895 
2896         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
2897                 printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
2898                                         "state, restarting it...\n");
2899 
2900                 instance->instancet->disable_intr(instance);
2901                 atomic_set(&instance->fw_outstanding, 0);
2902 
2903                 atomic_set(&instance->fw_reset_no_pci_access, 1);
2904                 instance->instancet->adp_reset(instance, instance->reg_set);
2905                 atomic_set(&instance->fw_reset_no_pci_access, 0 );
2906 
2907                 printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
2908                                         "initiating next stage...\n");
2909 
2910                 printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
2911                                         "state 2 starting...\n");
2912 
2913                 /*waitting for about 20 second before start the second init*/
2914                 for (wait = 0; wait < 30; wait++) {
2915                         msleep(1000);
2916                 }
2917 
2918                 if (megasas_transition_to_ready(instance, 1)) {
2919                         printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
2920 
2921                         megaraid_sas_kill_hba(instance);
2922                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2923                         return ;
2924                 }
2925 
2926                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
2927                         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
2928                         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
2929                         ) {
2930                         *instance->consumer = *instance->producer;
2931                 } else {
2932                         *instance->consumer = 0;
2933                         *instance->producer = 0;
2934                 }
2935 
2936                 megasas_issue_init_mfi(instance);
2937 
2938                 spin_lock_irqsave(&instance->hba_lock, flags);
2939                 instance->adprecovery   = MEGASAS_HBA_OPERATIONAL;
2940                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2941                 instance->instancet->enable_intr(instance);
2942 
2943                 megasas_issue_pending_cmds_again(instance);
2944                 instance->issuepend_done = 1;
2945         }
2946         return ;
2947 }
2948 
2949 /**
2950  * megasas_deplete_reply_queue -        Processes all completed commands
2951  * @instance:                           Adapter soft state
2952  * @alt_status:                         Alternate status to be returned to
2953  *                                      SCSI mid-layer instead of the status
2954  *                                      returned by the FW
2955  * Note: this must be called with hba lock held
2956  */
2957 static int
2958 megasas_deplete_reply_queue(struct megasas_instance *instance,
2959                                         u8 alt_status)
2960 {
2961         u32 mfiStatus;
2962         u32 fw_state;
2963 
2964         if ((mfiStatus = instance->instancet->check_reset(instance,
2965                                         instance->reg_set)) == 1) {
2966                 return IRQ_HANDLED;
2967         }
2968 
2969         if ((mfiStatus = instance->instancet->clear_intr(
2970                                                 instance->reg_set)
2971                                                 ) == 0) {
2972                 /* Hardware may not set outbound_intr_status in MSI-X mode */
2973                 if (!instance->msix_vectors)
2974                         return IRQ_NONE;
2975         }
2976 
2977         instance->mfiStatus = mfiStatus;
2978 
2979         if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
2980                 fw_state = instance->instancet->read_fw_status_reg(
2981                                 instance->reg_set) & MFI_STATE_MASK;
2982 
2983                 if (fw_state != MFI_STATE_FAULT) {
2984                         printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
2985                                                 fw_state);
2986                 }
2987 
2988                 if ((fw_state == MFI_STATE_FAULT) &&
2989                                 (instance->disableOnlineCtrlReset == 0)) {
2990                         printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
2991 
2992                         if ((instance->pdev->device ==
2993                                         PCI_DEVICE_ID_LSI_SAS1064R) ||
2994                                 (instance->pdev->device ==
2995                                         PCI_DEVICE_ID_DELL_PERC5) ||
2996                                 (instance->pdev->device ==
2997                                         PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
2998 
2999                                 *instance->consumer =
3000                                         cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
3001                         }
3002 
3003 
3004                         instance->instancet->disable_intr(instance);
3005                         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
3006                         instance->issuepend_done = 0;
3007 
3008                         atomic_set(&instance->fw_outstanding, 0);
3009                         megasas_internal_reset_defer_cmds(instance);
3010 
3011                         printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
3012                                         fw_state, instance->adprecovery);
3013 
3014                         schedule_work(&instance->work_init);
3015                         return IRQ_HANDLED;
3016 
3017                 } else {
3018                         printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
3019                                 fw_state, instance->disableOnlineCtrlReset);
3020                 }
3021         }
3022 
3023         tasklet_schedule(&instance->isr_tasklet);
3024         return IRQ_HANDLED;
3025 }
3026 /**
3027  * megasas_isr - isr entry point
3028  */
3029 static irqreturn_t megasas_isr(int irq, void *devp)
3030 {
3031         struct megasas_irq_context *irq_context = devp;
3032         struct megasas_instance *instance = irq_context->instance;
3033         unsigned long flags;
3034         irqreturn_t     rc;
3035 
3036         if (atomic_read(&instance->fw_reset_no_pci_access))
3037                 return IRQ_HANDLED;
3038 
3039         spin_lock_irqsave(&instance->hba_lock, flags);
3040         rc =  megasas_deplete_reply_queue(instance, DID_OK);
3041         spin_unlock_irqrestore(&instance->hba_lock, flags);
3042 
3043         return rc;
3044 }
3045 
3046 /**
3047  * megasas_transition_to_ready -        Move the FW to READY state
3048  * @instance:                           Adapter soft state
3049  *
3050  * During the initialization, FW passes can potentially be in any one of
3051  * several possible states. If the FW in operational, waiting-for-handshake
3052  * states, driver must take steps to bring it to ready state. Otherwise, it
3053  * has to wait for the ready state.
3054  */
3055 int
3056 megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
3057 {
3058         int i;
3059         u8 max_wait;
3060         u32 fw_state;
3061         u32 cur_state;
3062         u32 abs_state, curr_abs_state;
3063 
3064         fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
3065 
3066         if (fw_state != MFI_STATE_READY)
3067                 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
3068                        " state\n");
3069 
3070         while (fw_state != MFI_STATE_READY) {
3071 
3072                 abs_state =
3073                 instance->instancet->read_fw_status_reg(instance->reg_set);
3074 
3075                 switch (fw_state) {
3076 
3077                 case MFI_STATE_FAULT:
3078                         printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
3079                         if (ocr) {
3080                                 max_wait = MEGASAS_RESET_WAIT_TIME;
3081                                 cur_state = MFI_STATE_FAULT;
3082                                 break;
3083                         } else
3084                                 return -ENODEV;
3085 
3086                 case MFI_STATE_WAIT_HANDSHAKE:
3087                         /*
3088                          * Set the CLR bit in inbound doorbell
3089                          */
3090                         if ((instance->pdev->device ==
3091                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3092                                 (instance->pdev->device ==
3093                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3094                                 (instance->pdev->device ==
3095                                 PCI_DEVICE_ID_LSI_FUSION) ||
3096                                 (instance->pdev->device ==
3097                                 PCI_DEVICE_ID_LSI_PLASMA) ||
3098                                 (instance->pdev->device ==
3099                                 PCI_DEVICE_ID_LSI_INVADER) ||
3100                                 (instance->pdev->device ==
3101                                 PCI_DEVICE_ID_LSI_FURY)) {
3102                                 writel(
3103                                   MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3104                                   &instance->reg_set->doorbell);
3105                         } else {
3106                                 writel(
3107                                     MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3108                                         &instance->reg_set->inbound_doorbell);
3109                         }
3110 
3111                         max_wait = MEGASAS_RESET_WAIT_TIME;
3112                         cur_state = MFI_STATE_WAIT_HANDSHAKE;
3113                         break;
3114 
3115                 case MFI_STATE_BOOT_MESSAGE_PENDING:
3116                         if ((instance->pdev->device ==
3117                              PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3118                                 (instance->pdev->device ==
3119                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3120                             (instance->pdev->device ==
3121                              PCI_DEVICE_ID_LSI_FUSION) ||
3122                             (instance->pdev->device ==
3123                              PCI_DEVICE_ID_LSI_PLASMA) ||
3124                             (instance->pdev->device ==
3125                              PCI_DEVICE_ID_LSI_INVADER) ||
3126                             (instance->pdev->device ==
3127                              PCI_DEVICE_ID_LSI_FURY)) {
3128                                 writel(MFI_INIT_HOTPLUG,
3129                                        &instance->reg_set->doorbell);
3130                         } else
3131                                 writel(MFI_INIT_HOTPLUG,
3132                                         &instance->reg_set->inbound_doorbell);
3133 
3134                         max_wait = MEGASAS_RESET_WAIT_TIME;
3135                         cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
3136                         break;
3137 
3138                 case MFI_STATE_OPERATIONAL:
3139                         /*
3140                          * Bring it to READY state; assuming max wait 10 secs
3141                          */
3142                         instance->instancet->disable_intr(instance);
3143                         if ((instance->pdev->device ==
3144                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3145                                 (instance->pdev->device ==
3146                                 PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
3147                                 (instance->pdev->device
3148                                         == PCI_DEVICE_ID_LSI_FUSION) ||
3149                                 (instance->pdev->device
3150                                         == PCI_DEVICE_ID_LSI_PLASMA) ||
3151                                 (instance->pdev->device
3152                                         == PCI_DEVICE_ID_LSI_INVADER) ||
3153                                 (instance->pdev->device
3154                                         == PCI_DEVICE_ID_LSI_FURY)) {
3155                                 writel(MFI_RESET_FLAGS,
3156                                         &instance->reg_set->doorbell);
3157                                 if ((instance->pdev->device ==
3158                                         PCI_DEVICE_ID_LSI_FUSION) ||
3159                                         (instance->pdev->device ==
3160                                         PCI_DEVICE_ID_LSI_PLASMA) ||
3161                                         (instance->pdev->device ==
3162                                         PCI_DEVICE_ID_LSI_INVADER) ||
3163                                         (instance->pdev->device ==
3164                                         PCI_DEVICE_ID_LSI_FURY)) {
3165                                         for (i = 0; i < (10 * 1000); i += 20) {
3166                                                 if (readl(
3167                                                             &instance->
3168                                                             reg_set->
3169                                                             doorbell) & 1)
3170                                                         msleep(20);
3171                                                 else
3172                                                         break;
3173                                         }
3174                                 }
3175                         } else
3176                                 writel(MFI_RESET_FLAGS,
3177                                         &instance->reg_set->inbound_doorbell);
3178 
3179                         max_wait = MEGASAS_RESET_WAIT_TIME;
3180                         cur_state = MFI_STATE_OPERATIONAL;
3181                         break;
3182 
3183                 case MFI_STATE_UNDEFINED:
3184                         /*
3185                          * This state should not last for more than 2 seconds
3186                          */
3187                         max_wait = MEGASAS_RESET_WAIT_TIME;
3188                         cur_state = MFI_STATE_UNDEFINED;
3189                         break;
3190 
3191                 case MFI_STATE_BB_INIT:
3192                         max_wait = MEGASAS_RESET_WAIT_TIME;
3193                         cur_state = MFI_STATE_BB_INIT;
3194                         break;
3195 
3196                 case MFI_STATE_FW_INIT:
3197                         max_wait = MEGASAS_RESET_WAIT_TIME;
3198                         cur_state = MFI_STATE_FW_INIT;
3199                         break;
3200 
3201                 case MFI_STATE_FW_INIT_2:
3202                         max_wait = MEGASAS_RESET_WAIT_TIME;
3203                         cur_state = MFI_STATE_FW_INIT_2;
3204                         break;
3205 
3206                 case MFI_STATE_DEVICE_SCAN:
3207                         max_wait = MEGASAS_RESET_WAIT_TIME;
3208                         cur_state = MFI_STATE_DEVICE_SCAN;
3209                         break;
3210 
3211                 case MFI_STATE_FLUSH_CACHE:
3212                         max_wait = MEGASAS_RESET_WAIT_TIME;
3213                         cur_state = MFI_STATE_FLUSH_CACHE;
3214                         break;
3215 
3216                 default:
3217                         printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
3218                                fw_state);
3219                         return -ENODEV;
3220                 }
3221 
3222                 /*
3223                  * The cur_state should not last for more than max_wait secs
3224                  */
3225                 for (i = 0; i < (max_wait * 1000); i++) {
3226                         fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
3227                                         MFI_STATE_MASK ;
3228                 curr_abs_state =
3229                 instance->instancet->read_fw_status_reg(instance->reg_set);
3230 
3231                         if (abs_state == curr_abs_state) {
3232                                 msleep(1);
3233                         } else
3234                                 break;
3235                 }
3236 
3237                 /*
3238                  * Return error if fw_state hasn't changed after max_wait
3239                  */
3240                 if (curr_abs_state == abs_state) {
3241                         printk(KERN_DEBUG "FW state [%d] hasn't changed "
3242                                "in %d secs\n", fw_state, max_wait);
3243                         return -ENODEV;
3244                 }
3245         }
3246         printk(KERN_INFO "megasas: FW now in Ready state\n");
3247 
3248         return 0;
3249 }
3250 
3251 /**
3252  * megasas_teardown_frame_pool -        Destroy the cmd frame DMA pool
3253  * @instance:                           Adapter soft state
3254  */
3255 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
3256 {
3257         int i;
3258         u32 max_cmd = instance->max_mfi_cmds;
3259         struct megasas_cmd *cmd;
3260 
3261         if (!instance->frame_dma_pool)
3262                 return;
3263 
3264         /*
3265          * Return all frames to pool
3266          */
3267         for (i = 0; i < max_cmd; i++) {
3268 
3269                 cmd = instance->cmd_list[i];
3270 
3271                 if (cmd->frame)
3272                         pci_pool_free(instance->frame_dma_pool, cmd->frame,
3273                                       cmd->frame_phys_addr);
3274 
3275                 if (cmd->sense)
3276                         pci_pool_free(instance->sense_dma_pool, cmd->sense,
3277                                       cmd->sense_phys_addr);
3278         }
3279 
3280         /*
3281          * Now destroy the pool itself
3282          */
3283         pci_pool_destroy(instance->frame_dma_pool);
3284         pci_pool_destroy(instance->sense_dma_pool);
3285 
3286         instance->frame_dma_pool = NULL;
3287         instance->sense_dma_pool = NULL;
3288 }
3289 
3290 /**
3291  * megasas_create_frame_pool -  Creates DMA pool for cmd frames
3292  * @instance:                   Adapter soft state
3293  *
3294  * Each command packet has an embedded DMA memory buffer that is used for
3295  * filling MFI frame and the SG list that immediately follows the frame. This
3296  * function creates those DMA memory buffers for each command packet by using
3297  * PCI pool facility.
3298  */
3299 static int megasas_create_frame_pool(struct megasas_instance *instance)
3300 {
3301         int i;
3302         u32 max_cmd;
3303         u32 sge_sz;
3304         u32 sgl_sz;
3305         u32 total_sz;
3306         u32 frame_count;
3307         struct megasas_cmd *cmd;
3308 
3309         max_cmd = instance->max_mfi_cmds;
3310 
3311         /*
3312          * Size of our frame is 64 bytes for MFI frame, followed by max SG
3313          * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
3314          */
3315         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
3316             sizeof(struct megasas_sge32);
3317 
3318         if (instance->flag_ieee) {
3319                 sge_sz = sizeof(struct megasas_sge_skinny);
3320         }
3321 
3322         /*
3323          * Calculated the number of 64byte frames required for SGL
3324          */
3325         sgl_sz = sge_sz * instance->max_num_sge;
3326         frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
3327         frame_count = 15;
3328 
3329         /*
3330          * We need one extra frame for the MFI command
3331          */
3332         frame_count++;
3333 
3334         total_sz = MEGAMFI_FRAME_SIZE * frame_count;
3335         /*
3336          * Use DMA pool facility provided by PCI layer
3337          */
3338         instance->frame_dma_pool = pci_pool_create("megasas frame pool",
3339                                                    instance->pdev, total_sz, 64,
3340                                                    0);
3341 
3342         if (!instance->frame_dma_pool) {
3343                 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
3344                 return -ENOMEM;
3345         }
3346 
3347         instance->sense_dma_pool = pci_pool_create("megasas sense pool",
3348                                                    instance->pdev, 128, 4, 0);
3349 
3350         if (!instance->sense_dma_pool) {
3351                 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
3352 
3353                 pci_pool_destroy(instance->frame_dma_pool);
3354                 instance->frame_dma_pool = NULL;
3355 
3356                 return -ENOMEM;
3357         }
3358 
3359         /*
3360          * Allocate and attach a frame to each of the commands in cmd_list.
3361          * By making cmd->index as the context instead of the &cmd, we can
3362          * always use 32bit context regardless of the architecture
3363          */
3364         for (i = 0; i < max_cmd; i++) {
3365 
3366                 cmd = instance->cmd_list[i];
3367 
3368                 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
3369                                             GFP_KERNEL, &cmd->frame_phys_addr);
3370 
3371                 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
3372                                             GFP_KERNEL, &cmd->sense_phys_addr);
3373 
3374                 /*
3375                  * megasas_teardown_frame_pool() takes care of freeing
3376                  * whatever has been allocated
3377                  */
3378                 if (!cmd->frame || !cmd->sense) {
3379                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
3380                         megasas_teardown_frame_pool(instance);
3381                         return -ENOMEM;
3382                 }
3383 
3384                 memset(cmd->frame, 0, total_sz);
3385                 cmd->frame->io.context = cpu_to_le32(cmd->index);
3386                 cmd->frame->io.pad_0 = 0;
3387                 if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
3388                     (instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
3389                     (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
3390                         (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
3391                     (reset_devices))
3392                         cmd->frame->hdr.cmd = MFI_CMD_INVALID;
3393         }
3394 
3395         return 0;
3396 }
3397 
3398 /**
3399  * megasas_free_cmds -  Free all the cmds in the free cmd pool
3400  * @instance:           Adapter soft state
3401  */
3402 void megasas_free_cmds(struct megasas_instance *instance)
3403 {
3404         int i;
3405         /* First free the MFI frame pool */
3406         megasas_teardown_frame_pool(instance);
3407 
3408         /* Free all the commands in the cmd_list */
3409         for (i = 0; i < instance->max_mfi_cmds; i++)
3410 
3411                 kfree(instance->cmd_list[i]);
3412 
3413         /* Free the cmd_list buffer itself */
3414         kfree(instance->cmd_list);
3415         instance->cmd_list = NULL;
3416 
3417         INIT_LIST_HEAD(&instance->cmd_pool);
3418 }
3419 
3420 /**
3421  * megasas_alloc_cmds - Allocates the command packets
3422  * @instance:           Adapter soft state
3423  *
3424  * Each command that is issued to the FW, whether IO commands from the OS or
3425  * internal commands like IOCTLs, are wrapped in local data structure called
3426  * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
3427  * the FW.
3428  *
3429  * Each frame has a 32-bit field called context (tag). This context is used
3430  * to get back the megasas_cmd from the frame when a frame gets completed in
3431  * the ISR. Typically the address of the megasas_cmd itself would be used as
3432  * the context. But we wanted to keep the differences between 32 and 64 bit
3433  * systems to the mininum. We always use 32 bit integers for the context. In
3434  * this driver, the 32 bit values are the indices into an array cmd_list.
3435  * This array is used only to look up the megasas_cmd given the context. The
3436  * free commands themselves are maintained in a linked list called cmd_pool.
3437  */
3438 int megasas_alloc_cmds(struct megasas_instance *instance)
3439 {
3440         int i;
3441         int j;
3442         u32 max_cmd;
3443         struct megasas_cmd *cmd;
3444 
3445         max_cmd = instance->max_mfi_cmds;
3446 
3447         /*
3448          * instance->cmd_list is an array of struct megasas_cmd pointers.
3449          * Allocate the dynamic array first and then allocate individual
3450          * commands.
3451          */
3452         instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
3453 
3454         if (!instance->cmd_list) {
3455                 printk(KERN_DEBUG "megasas: out of memory\n");
3456                 return -ENOMEM;
3457         }
3458 
3459         memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
3460 
3461         for (i = 0; i < max_cmd; i++) {
3462                 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
3463                                                 GFP_KERNEL);
3464 
3465                 if (!instance->cmd_list[i]) {
3466 
3467                         for (j = 0; j < i; j++)
3468                                 kfree(instance->cmd_list[j]);
3469 
3470                         kfree(instance->cmd_list);
3471                         instance->cmd_list = NULL;
3472 
3473                         return -ENOMEM;
3474                 }
3475         }
3476 
3477         /*
3478          * Add all the commands to command pool (instance->cmd_pool)
3479          */
3480         for (i = 0; i < max_cmd; i++) {
3481                 cmd = instance->cmd_list[i];
3482                 memset(cmd, 0, sizeof(struct megasas_cmd));
3483                 cmd->index = i;
3484                 cmd->scmd = NULL;
3485                 cmd->instance = instance;
3486 
3487                 list_add_tail(&cmd->list, &instance->cmd_pool);
3488         }
3489 
3490         /*
3491          * Create a frame pool and assign one frame to each cmd
3492          */
3493         if (megasas_create_frame_pool(instance)) {
3494                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
3495                 megasas_free_cmds(instance);
3496         }
3497 
3498         return 0;
3499 }
3500 
3501 /*
3502  * megasas_get_pd_list_info -   Returns FW's pd_list structure
3503  * @instance:                           Adapter soft state
3504  * @pd_list:                            pd_list structure
3505  *
3506  * Issues an internal command (DCMD) to get the FW's controller PD
3507  * list structure.  This information is mainly used to find out SYSTEM
3508  * supported by the FW.
3509  */
3510 static int
3511 megasas_get_pd_list(struct megasas_instance *instance)
3512 {
3513         int ret = 0, pd_index = 0;
3514         struct megasas_cmd *cmd;
3515         struct megasas_dcmd_frame *dcmd;
3516         struct MR_PD_LIST *ci;
3517         struct MR_PD_ADDRESS *pd_addr;
3518         dma_addr_t ci_h = 0;
3519 
3520         cmd = megasas_get_cmd(instance);
3521 
3522         if (!cmd) {
3523                 printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3524                 return -ENOMEM;
3525         }
3526 
3527         dcmd = &cmd->frame->dcmd;
3528 
3529         ci = pci_alloc_consistent(instance->pdev,
3530                   MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3531 
3532         if (!ci) {
3533                 printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3534                 megasas_return_cmd(instance, cmd);
3535                 return -ENOMEM;
3536         }
3537 
3538         memset(ci, 0, sizeof(*ci));
3539         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3540 
3541         dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3542         dcmd->mbox.b[1] = 0;
3543         dcmd->cmd = MFI_CMD_DCMD;
3544         dcmd->cmd_status = 0xFF;
3545         dcmd->sge_count = 1;
3546         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3547         dcmd->timeout = 0;
3548         dcmd->pad_0 = 0;
3549         dcmd->data_xfer_len = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3550         dcmd->opcode = cpu_to_le32(MR_DCMD_PD_LIST_QUERY);
3551         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3552         dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3553 
3554         if (!megasas_issue_polled(instance, cmd)) {
3555                 ret = 0;
3556         } else {
3557                 ret = -1;
3558         }
3559 
3560         /*
3561         * the following function will get the instance PD LIST.
3562         */
3563 
3564         pd_addr = ci->addr;
3565 
3566         if ( ret == 0 &&
3567              (le32_to_cpu(ci->count) <
3568                   (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3569 
3570                 memset(instance->local_pd_list, 0,
3571                         MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3572 
3573                 for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) {
3574 
3575                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid     =
3576                                 le16_to_cpu(pd_addr->deviceId);
3577                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType       =
3578                                                         pd_addr->scsiDevType;
3579                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState      =
3580                                                         MR_PD_STATE_SYSTEM;
3581                         pd_addr++;
3582                 }
3583                 memcpy(instance->pd_list, instance->local_pd_list,
3584                         sizeof(instance->pd_list));
3585         }
3586 
3587         pci_free_consistent(instance->pdev,
3588                                 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3589                                 ci, ci_h);
3590         megasas_return_cmd(instance, cmd);
3591 
3592         return ret;
3593 }
3594 
3595 /*
3596  * megasas_get_ld_list_info -   Returns FW's ld_list structure
3597  * @instance:                           Adapter soft state
3598  * @ld_list:                            ld_list structure
3599  *
3600  * Issues an internal command (DCMD) to get the FW's controller PD
3601  * list structure.  This information is mainly used to find out SYSTEM
3602  * supported by the FW.
3603  */
3604 static int
3605 megasas_get_ld_list(struct megasas_instance *instance)
3606 {
3607         int ret = 0, ld_index = 0, ids = 0;
3608         struct megasas_cmd *cmd;
3609         struct megasas_dcmd_frame *dcmd;
3610         struct MR_LD_LIST *ci;
3611         dma_addr_t ci_h = 0;
3612         u32 ld_count;
3613 
3614         cmd = megasas_get_cmd(instance);
3615 
3616         if (!cmd) {
3617                 printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3618                 return -ENOMEM;
3619         }
3620 
3621         dcmd = &cmd->frame->dcmd;
3622 
3623         ci = pci_alloc_consistent(instance->pdev,
3624                                 sizeof(struct MR_LD_LIST),
3625                                 &ci_h);
3626 
3627         if (!ci) {
3628                 printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3629                 megasas_return_cmd(instance, cmd);
3630                 return -ENOMEM;
3631         }
3632 
3633         memset(ci, 0, sizeof(*ci));
3634         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3635 
3636         dcmd->cmd = MFI_CMD_DCMD;
3637         dcmd->cmd_status = 0xFF;
3638         dcmd->sge_count = 1;
3639         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3640         dcmd->timeout = 0;
3641         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_LIST));
3642         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_GET_LIST);
3643         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3644         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST));
3645         dcmd->pad_0  = 0;
3646 
3647         if (!megasas_issue_polled(instance, cmd)) {
3648                 ret = 0;
3649         } else {
3650                 ret = -1;
3651         }
3652 
3653         ld_count = le32_to_cpu(ci->ldCount);
3654 
3655         /* the following function will get the instance PD LIST */
3656 
3657         if ((ret == 0) && (ld_count <= MAX_LOGICAL_DRIVES)) {
3658                 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3659 
3660                 for (ld_index = 0; ld_index < ld_count; ld_index++) {
3661                         if (ci->ldList[ld_index].state != 0) {
3662                                 ids = ci->ldList[ld_index].ref.targetId;
3663                                 instance->ld_ids[ids] =
3664                                         ci->ldList[ld_index].ref.targetId;
3665                         }
3666                 }
3667         }
3668 
3669         pci_free_consistent(instance->pdev,
3670                                 sizeof(struct MR_LD_LIST),
3671                                 ci,
3672                                 ci_h);
3673 
3674         megasas_return_cmd(instance, cmd);
3675         return ret;
3676 }
3677 
3678 /**
3679  * megasas_ld_list_query -      Returns FW's ld_list structure
3680  * @instance:                           Adapter soft state
3681  * @ld_list:                            ld_list structure
3682  *
3683  * Issues an internal command (DCMD) to get the FW's controller PD
3684  * list structure.  This information is mainly used to find out SYSTEM
3685  * supported by the FW.
3686  */
3687 static int
3688 megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
3689 {
3690         int ret = 0, ld_index = 0, ids = 0;
3691         struct megasas_cmd *cmd;
3692         struct megasas_dcmd_frame *dcmd;
3693         struct MR_LD_TARGETID_LIST *ci;
3694         dma_addr_t ci_h = 0;
3695         u32 tgtid_count;
3696 
3697         cmd = megasas_get_cmd(instance);
3698 
3699         if (!cmd) {
3700                 printk(KERN_WARNING
3701                        "megasas:(megasas_ld_list_query): Failed to get cmd\n");
3702                 return -ENOMEM;
3703         }
3704 
3705         dcmd = &cmd->frame->dcmd;
3706 
3707         ci = pci_alloc_consistent(instance->pdev,
3708                                   sizeof(struct MR_LD_TARGETID_LIST), &ci_h);
3709 
3710         if (!ci) {
3711                 printk(KERN_WARNING
3712                        "megasas: Failed to alloc mem for ld_list_query\n");
3713                 megasas_return_cmd(instance, cmd);
3714                 return -ENOMEM;
3715         }
3716 
3717         memset(ci, 0, sizeof(*ci));
3718         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3719 
3720         dcmd->mbox.b[0] = query_type;
3721 
3722         dcmd->cmd = MFI_CMD_DCMD;
3723         dcmd->cmd_status = 0xFF;
3724         dcmd->sge_count = 1;
3725         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3726         dcmd->timeout = 0;
3727         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
3728         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_LIST_QUERY);
3729         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3730         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
3731         dcmd->pad_0  = 0;
3732 
3733         if (!megasas_issue_polled(instance, cmd) && !dcmd->cmd_status) {
3734                 ret = 0;
3735         } else {
3736                 /* On failure, call older LD list DCMD */
3737                 ret = 1;
3738         }
3739 
3740         tgtid_count = le32_to_cpu(ci->count);
3741 
3742         if ((ret == 0) && (tgtid_count <= (MAX_LOGICAL_DRIVES))) {
3743                 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3744                 for (ld_index = 0; ld_index < tgtid_count; ld_index++) {
3745                         ids = ci->targetId[ld_index];
3746                         instance->ld_ids[ids] = ci->targetId[ld_index];
3747                 }
3748 
3749         }
3750 
3751         pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST),
3752                             ci, ci_h);
3753 
3754         megasas_return_cmd(instance, cmd);
3755 
3756         return ret;
3757 }
3758 
3759 /**
3760  * megasas_get_controller_info -        Returns FW's controller structure
3761  * @instance:                           Adapter soft state
3762  * @ctrl_info:                          Controller information structure
3763  *
3764  * Issues an internal command (DCMD) to get the FW's controller structure.
3765  * This information is mainly used to find out the maximum IO transfer per
3766  * command supported by the FW.
3767  */
3768 static int
3769 megasas_get_ctrl_info(struct megasas_instance *instance,
3770                       struct megasas_ctrl_info *ctrl_info)
3771 {
3772         int ret = 0;
3773         struct megasas_cmd *cmd;
3774         struct megasas_dcmd_frame *dcmd;
3775         struct megasas_ctrl_info *ci;
3776         dma_addr_t ci_h = 0;
3777 
3778         cmd = megasas_get_cmd(instance);
3779 
3780         if (!cmd) {
3781                 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
3782                 return -ENOMEM;
3783         }
3784 
3785         dcmd = &cmd->frame->dcmd;
3786 
3787         ci = pci_alloc_consistent(instance->pdev,
3788                                   sizeof(struct megasas_ctrl_info), &ci_h);
3789 
3790         if (!ci) {
3791                 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
3792                 megasas_return_cmd(instance, cmd);
3793                 return -ENOMEM;
3794         }
3795 
3796         memset(ci, 0, sizeof(*ci));
3797         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3798 
3799         dcmd->cmd = MFI_CMD_DCMD;
3800         dcmd->cmd_status = 0xFF;
3801         dcmd->sge_count = 1;
3802         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3803         dcmd->timeout = 0;
3804         dcmd->pad_0 = 0;
3805         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_ctrl_info));
3806         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_GET_INFO);
3807         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3808         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info));
3809 
3810         if (!megasas_issue_polled(instance, cmd)) {
3811                 ret = 0;
3812                 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
3813         } else {
3814                 ret = -1;
3815         }
3816 
3817         pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
3818                             ci, ci_h);
3819 
3820         megasas_return_cmd(instance, cmd);
3821         return ret;
3822 }
3823 
3824 /**
3825  * megasas_issue_init_mfi -     Initializes the FW
3826  * @instance:           Adapter soft state
3827  *
3828  * Issues the INIT MFI cmd
3829  */
3830 static int
3831 megasas_issue_init_mfi(struct megasas_instance *instance)
3832 {
3833         u32 context;
3834 
3835         struct megasas_cmd *cmd;
3836 
3837         struct megasas_init_frame *init_frame;
3838         struct megasas_init_queue_info *initq_info;
3839         dma_addr_t init_frame_h;
3840         dma_addr_t initq_info_h;
3841 
3842         /*
3843          * Prepare a init frame. Note the init frame points to queue info
3844          * structure. Each frame has SGL allocated after first 64 bytes. For
3845          * this frame - since we don't need any SGL - we use SGL's space as
3846          * queue info structure
3847          *
3848          * We will not get a NULL command below. We just created the pool.
3849          */
3850         cmd = megasas_get_cmd(instance);
3851 
3852         init_frame = (struct megasas_init_frame *)cmd->frame;
3853         initq_info = (struct megasas_init_queue_info *)
3854                 ((unsigned long)init_frame + 64);
3855 
3856         init_frame_h = cmd->frame_phys_addr;
3857         initq_info_h = init_frame_h + 64;
3858 
3859         context = init_frame->context;
3860         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
3861         memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
3862         init_frame->context = context;
3863 
3864         initq_info->reply_queue_entries = cpu_to_le32(instance->max_fw_cmds + 1);
3865         initq_info->reply_queue_start_phys_addr_lo = cpu_to_le32(instance->reply_queue_h);
3866 
3867         initq_info->producer_index_phys_addr_lo = cpu_to_le32(instance->producer_h);
3868         initq_info->consumer_index_phys_addr_lo = cpu_to_le32(instance->consumer_h);
3869 
3870         init_frame->cmd = MFI_CMD_INIT;
3871         init_frame->cmd_status = 0xFF;
3872         init_frame->queue_info_new_phys_addr_lo =
3873                 cpu_to_le32(lower_32_bits(initq_info_h));
3874         init_frame->queue_info_new_phys_addr_hi =
3875                 cpu_to_le32(upper_32_bits(initq_info_h));
3876 
3877         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct megasas_init_queue_info));
3878 
3879         /*
3880          * disable the intr before firing the init frame to FW
3881          */
3882         instance->instancet->disable_intr(instance);
3883 
3884         /*
3885          * Issue the init frame in polled mode
3886          */
3887 
3888         if (megasas_issue_polled(instance, cmd)) {
3889                 printk(KERN_ERR "megasas: Failed to init firmware\n");
3890                 megasas_return_cmd(instance, cmd);
3891                 goto fail_fw_init;
3892         }
3893 
3894         megasas_return_cmd(instance, cmd);
3895 
3896         return 0;
3897 
3898 fail_fw_init:
3899         return -EINVAL;
3900 }
3901 
3902 static u32
3903 megasas_init_adapter_mfi(struct megasas_instance *instance)
3904 {
3905         struct megasas_register_set __iomem *reg_set;
3906         u32 context_sz;
3907         u32 reply_q_sz;
3908 
3909         reg_set = instance->reg_set;
3910 
3911         /*
3912          * Get various operational parameters from status register
3913          */
3914         instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
3915         /*
3916          * Reduce the max supported cmds by 1. This is to ensure that the
3917          * reply_q_sz (1 more than the max cmd that driver may send)
3918          * does not exceed max cmds that the FW can support
3919          */
3920         instance->max_fw_cmds = instance->max_fw_cmds-1;
3921         instance->max_mfi_cmds = instance->max_fw_cmds;
3922         instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
3923                                         0x10;
3924         /*
3925          * Create a pool of commands
3926          */
3927         if (megasas_alloc_cmds(instance))
3928                 goto fail_alloc_cmds;
3929 
3930         /*
3931          * Allocate memory for reply queue. Length of reply queue should
3932          * be _one_ more than the maximum commands handled by the firmware.
3933          *
3934          * Note: When FW completes commands, it places corresponding contex
3935          * values in this circular reply queue. This circular queue is a fairly
3936          * typical producer-consumer queue. FW is the producer (of completed
3937          * commands) and the driver is the consumer.
3938          */
3939         context_sz = sizeof(u32);
3940         reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
3941 
3942         instance->reply_queue = pci_alloc_consistent(instance->pdev,
3943                                                      reply_q_sz,
3944                                                      &instance->reply_queue_h);
3945 
3946         if (!instance->reply_queue) {
3947                 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
3948                 goto fail_reply_queue;
3949         }
3950 
3951         if (megasas_issue_init_mfi(instance))
3952                 goto fail_fw_init;
3953 
3954         instance->fw_support_ieee = 0;
3955         instance->fw_support_ieee =
3956                 (instance->instancet->read_fw_status_reg(reg_set) &
3957                 0x04000000);
3958 
3959         printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
3960                         instance->fw_support_ieee);
3961 
3962         if (instance->fw_support_ieee)
3963                 instance->flag_ieee = 1;
3964 
3965         return 0;
3966 
3967 fail_fw_init:
3968 
3969         pci_free_consistent(instance->pdev, reply_q_sz,
3970                             instance->reply_queue, instance->reply_queue_h);
3971 fail_reply_queue:
3972         megasas_free_cmds(instance);
3973 
3974 fail_alloc_cmds:
3975         return 1;
3976 }
3977 
3978 /**
3979  * megasas_init_fw -    Initializes the FW
3980  * @instance:           Adapter soft state
3981  *
3982  * This is the main function for initializing firmware
3983  */
3984 
3985 static int megasas_init_fw(struct megasas_instance *instance)
3986 {
3987         u32 max_sectors_1;
3988         u32 max_sectors_2;
3989         u32 tmp_sectors, msix_enable, scratch_pad_2;
3990         resource_size_t base_addr;
3991         struct megasas_register_set __iomem *reg_set;
3992         struct megasas_ctrl_info *ctrl_info;
3993         unsigned long bar_list;
3994         int i, loop, fw_msix_count = 0;
3995         struct IOV_111 *iovPtr;
3996 
3997         /* Find first memory bar */
3998         bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
3999         instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
4000         if (pci_request_selected_regions(instance->pdev, instance->bar,
4001                                          "megasas: LSI")) {
4002                 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
4003                 return -EBUSY;
4004         }
4005 
4006         base_addr = pci_resource_start(instance->pdev, instance->bar);
4007         instance->reg_set = ioremap_nocache(base_addr, 8192);
4008 
4009         if (!instance->reg_set) {
4010                 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
4011                 goto fail_ioremap;
4012         }
4013 
4014         reg_set = instance->reg_set;
4015 
4016         switch (instance->pdev->device) {
4017         case PCI_DEVICE_ID_LSI_FUSION:
4018         case PCI_DEVICE_ID_LSI_PLASMA:
4019         case PCI_DEVICE_ID_LSI_INVADER:
4020         case PCI_DEVICE_ID_LSI_FURY:
4021                 instance->instancet = &megasas_instance_template_fusion;
4022                 break;
4023         case PCI_DEVICE_ID_LSI_SAS1078R:
4024         case PCI_DEVICE_ID_LSI_SAS1078DE:
4025                 instance->instancet = &megasas_instance_template_ppc;
4026                 break;
4027         case PCI_DEVICE_ID_LSI_SAS1078GEN2:
4028         case PCI_DEVICE_ID_LSI_SAS0079GEN2:
4029                 instance->instancet = &megasas_instance_template_gen2;
4030                 break;
4031         case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
4032         case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
4033                 instance->instancet = &megasas_instance_template_skinny;
4034                 break;
4035         case PCI_DEVICE_ID_LSI_SAS1064R:
4036         case PCI_DEVICE_ID_DELL_PERC5:
4037         default:
4038                 instance->instancet = &megasas_instance_template_xscale;
4039                 break;
4040         }
4041 
4042         if (megasas_transition_to_ready(instance, 0)) {
4043                 atomic_set(&instance->fw_reset_no_pci_access, 1);
4044                 instance->instancet->adp_reset
4045                         (instance, instance->reg_set);
4046                 atomic_set(&instance->fw_reset_no_pci_access, 0);
4047                 dev_info(&instance->pdev->dev,
4048                         "megasas: FW restarted successfully from %s!\n",
4049                         __func__);
4050 
4051                 /*waitting for about 30 second before retry*/
4052                 ssleep(30);
4053 
4054                 if (megasas_transition_to_ready(instance, 0))
4055                         goto fail_ready_state;
4056         }
4057 
4058         /*
4059          * MSI-X host index 0 is common for all adapter.
4060          * It is used for all MPT based Adapters.
4061          */
4062         instance->reply_post_host_index_addr[0] =
4063                 (u32 *)((u8 *)instance->reg_set +
4064                 MPI2_REPLY_POST_HOST_INDEX_OFFSET);
4065 
4066         /* Check if MSI-X is supported while in ready state */
4067         msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
4068                        0x4000000) >> 0x1a;
4069         if (msix_enable && !msix_disable) {
4070                 scratch_pad_2 = readl
4071                         (&instance->reg_set->outbound_scratch_pad_2);
4072                 /* Check max MSI-X vectors */
4073                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4074                     (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA)) {
4075                         instance->msix_vectors = (scratch_pad_2
4076                                 & MR_MAX_REPLY_QUEUES_OFFSET) + 1;
4077                         fw_msix_count = instance->msix_vectors;
4078                         if (msix_vectors)
4079                                 instance->msix_vectors =
4080                                         min(msix_vectors,
4081                                             instance->msix_vectors);
4082                 } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)
4083                         || (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4084                         /* Invader/Fury supports more than 8 MSI-X */
4085                         instance->msix_vectors = ((scratch_pad_2
4086                                 & MR_MAX_REPLY_QUEUES_EXT_OFFSET)
4087                                 >> MR_MAX_REPLY_QUEUES_EXT_OFFSET_SHIFT) + 1;
4088                         fw_msix_count = instance->msix_vectors;
4089                         /* Save 1-15 reply post index address to local memory
4090                          * Index 0 is already saved from reg offset
4091                          * MPI2_REPLY_POST_HOST_INDEX_OFFSET
4092                          */
4093                         for (loop = 1; loop < MR_MAX_MSIX_REG_ARRAY; loop++) {
4094                                 instance->reply_post_host_index_addr[loop] =
4095                                         (u32 *)((u8 *)instance->reg_set +
4096                                         MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET
4097                                         + (loop * 0x10));
4098                         }
4099                         if (msix_vectors)
4100                                 instance->msix_vectors = min(msix_vectors,
4101                                         instance->msix_vectors);
4102                 } else
4103                         instance->msix_vectors = 1;
4104                 /* Don't bother allocating more MSI-X vectors than cpus */
4105                 instance->msix_vectors = min(instance->msix_vectors,
4106                                              (unsigned int)num_online_cpus());
4107                 for (i = 0; i < instance->msix_vectors; i++)
4108                         instance->msixentry[i].entry = i;
4109                 i = pci_enable_msix(instance->pdev, instance->msixentry,
4110                                     instance->msix_vectors);
4111                 if (i >= 0) {
4112                         if (i) {
4113                                 if (!pci_enable_msix(instance->pdev,
4114                                                      instance->msixentry, i))
4115                                         instance->msix_vectors = i;
4116                                 else
4117                                         instance->msix_vectors = 0;
4118                         }
4119                 } else
4120                         instance->msix_vectors = 0;
4121 
4122                 dev_info(&instance->pdev->dev, "[scsi%d]: FW supports"
4123                         "<%d> MSIX vector,Online CPUs: <%d>,"
4124                         "Current MSIX <%d>\n", instance->host->host_no,
4125                         fw_msix_count, (unsigned int)num_online_cpus(),
4126                         instance->msix_vectors);
4127         }
4128 
4129         /* Get operational params, sge flags, send init cmd to controller */
4130         if (instance->instancet->init_adapter(instance))
4131                 goto fail_init_adapter;
4132 
4133         printk(KERN_ERR "megasas: INIT adapter done\n");
4134 
4135         /** for passthrough
4136         * the following function will get the PD LIST.
4137         */
4138 
4139         memset(instance->pd_list, 0 ,
4140                 (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
4141         if (megasas_get_pd_list(instance) < 0) {
4142                 printk(KERN_ERR "megasas: failed to get PD list\n");
4143                 goto fail_init_adapter;
4144         }
4145 
4146         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4147         if (megasas_ld_list_query(instance,
4148                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
4149                 megasas_get_ld_list(instance);
4150 
4151         ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
4152 
4153         /*
4154          * Compute the max allowed sectors per IO: The controller info has two
4155          * limits on max sectors. Driver should use the minimum of these two.
4156          *
4157          * 1 << stripe_sz_ops.min = max sectors per strip
4158          *
4159          * Note that older firmwares ( < FW ver 30) didn't report information
4160          * to calculate max_sectors_1. So the number ended up as zero always.
4161          */
4162         tmp_sectors = 0;
4163         if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
4164 
4165                 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
4166                         le16_to_cpu(ctrl_info->max_strips_per_io);
4167                 max_sectors_2 = le32_to_cpu(ctrl_info->max_request_size);
4168 
4169                 tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
4170 
4171                 /*Check whether controller is iMR or MR */
4172                 if (ctrl_info->memory_size) {
4173                         instance->is_imr = 0;
4174                         dev_info(&instance->pdev->dev, "Controller type: MR,"
4175                                 "Memory size is: %dMB\n",
4176                                 le16_to_cpu(ctrl_info->memory_size));
4177                 } else {
4178                         instance->is_imr = 1;
4179                         dev_info(&instance->pdev->dev,
4180                                 "Controller type: iMR\n");
4181                 }
4182                 /* OnOffProperties are converted into CPU arch*/
4183                 le32_to_cpus((u32 *)&ctrl_info->properties.OnOffProperties);
4184                 instance->disableOnlineCtrlReset =
4185                 ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
4186                 /* adapterOperations2 are converted into CPU arch*/
4187                 le32_to_cpus((u32 *)&ctrl_info->adapterOperations2);
4188                 instance->mpio = ctrl_info->adapterOperations2.mpio;
4189                 instance->UnevenSpanSupport =
4190                         ctrl_info->adapterOperations2.supportUnevenSpans;
4191                 if (instance->UnevenSpanSupport) {
4192                         struct fusion_context *fusion = instance->ctrl_context;
4193                         dev_info(&instance->pdev->dev, "FW supports: "
4194                         "UnevenSpanSupport=%x\n", instance->UnevenSpanSupport);
4195                         if (MR_ValidateMapInfo(instance))
4196                                 fusion->fast_path_io = 1;
4197                         else
4198                                 fusion->fast_path_io = 0;
4199 
4200                 }
4201                 if (ctrl_info->host_interface.SRIOV) {
4202                         if (!ctrl_info->adapterOperations2.activePassive)
4203                                 instance->PlasmaFW111 = 1;
4204 
4205                         if (!instance->PlasmaFW111)
4206                                 instance->requestorId =
4207                                         ctrl_info->iov.requestorId;
4208                         else {
4209                                 iovPtr = (struct IOV_111 *)((unsigned char *)ctrl_info + IOV_111_OFFSET);
4210                                 instance->requestorId = iovPtr->requestorId;
4211                         }
4212                         printk(KERN_WARNING "megaraid_sas: I am VF "
4213                                "requestorId %d\n", instance->requestorId);
4214                 }
4215         }
4216         instance->max_sectors_per_req = instance->max_num_sge *
4217                                                 PAGE_SIZE / 512;
4218         if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
4219                 instance->max_sectors_per_req = tmp_sectors;
4220 
4221         kfree(ctrl_info);
4222 
4223         /* Check for valid throttlequeuedepth module parameter */
4224         if (instance->is_imr) {
4225                 if (throttlequeuedepth > (instance->max_fw_cmds -
4226                                           MEGASAS_SKINNY_INT_CMDS))
4227                         instance->throttlequeuedepth =
4228                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4229                 else
4230                         instance->throttlequeuedepth = throttlequeuedepth;
4231         } else {
4232                 if (throttlequeuedepth > (instance->max_fw_cmds -
4233                                           MEGASAS_INT_CMDS))
4234                         instance->throttlequeuedepth =
4235                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4236                 else
4237                         instance->throttlequeuedepth = throttlequeuedepth;
4238         }
4239 
4240         /*
4241         * Setup tasklet for cmd completion
4242         */
4243 
4244         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4245                 (unsigned long)instance);
4246 
4247         /* Launch SR-IOV heartbeat timer */
4248         if (instance->requestorId) {
4249                 if (!megasas_sriov_start_heartbeat(instance, 1))
4250                         megasas_start_timer(instance,
4251                                             &instance->sriov_heartbeat_timer,
4252                                             megasas_sriov_heartbeat_handler,
4253                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
4254                 else
4255                         instance->skip_heartbeat_timer_del = 1;
4256         }
4257 
4258         return 0;
4259 
4260 fail_init_adapter:
4261 fail_ready_state:
4262         iounmap(instance->reg_set);
4263 
4264       fail_ioremap:
4265         pci_release_selected_regions(instance->pdev, instance->bar);
4266 
4267         return -EINVAL;
4268 }
4269 
4270 /**
4271  * megasas_release_mfi -        Reverses the FW initialization
4272  * @intance:                    Adapter soft state
4273  */
4274 static void megasas_release_mfi(struct megasas_instance *instance)
4275 {
4276         u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
4277 
4278         if (instance->reply_queue)
4279                 pci_free_consistent(instance->pdev, reply_q_sz,
4280                             instance->reply_queue, instance->reply_queue_h);
4281 
4282         megasas_free_cmds(instance);
4283 
4284         iounmap(instance->reg_set);
4285 
4286         pci_release_selected_regions(instance->pdev, instance->bar);
4287 }
4288 
4289 /**
4290  * megasas_get_seq_num -        Gets latest event sequence numbers
4291  * @instance:                   Adapter soft state
4292  * @eli:                        FW event log sequence numbers information
4293  *
4294  * FW maintains a log of all events in a non-volatile area. Upper layers would
4295  * usually find out the latest sequence number of the events, the seq number at
4296  * the boot etc. They would "read" all the events below the latest seq number
4297  * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
4298  * number), they would subsribe to AEN (asynchronous event notification) and
4299  * wait for the events to happen.
4300  */
4301 static int
4302 megasas_get_seq_num(struct megasas_instance *instance,
4303                     struct megasas_evt_log_info *eli)
4304 {
4305         struct megasas_cmd *cmd;
4306         struct megasas_dcmd_frame *dcmd;
4307         struct megasas_evt_log_info *el_info;
4308         dma_addr_t el_info_h = 0;
4309 
4310         cmd = megasas_get_cmd(instance);
4311 
4312         if (!cmd) {
4313                 return -ENOMEM;
4314         }
4315 
4316         dcmd = &cmd->frame->dcmd;
4317         el_info = pci_alloc_consistent(instance->pdev,
4318                                        sizeof(struct megasas_evt_log_info),
4319                                        &el_info_h);
4320 
4321         if (!el_info) {
4322                 megasas_return_cmd(instance, cmd);
4323                 return -ENOMEM;
4324         }
4325 
4326         memset(el_info, 0, sizeof(*el_info));
4327         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4328 
4329         dcmd->cmd = MFI_CMD_DCMD;
4330         dcmd->cmd_status = 0x0;
4331         dcmd->sge_count = 1;
4332         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4333         dcmd->timeout = 0;
4334         dcmd->pad_0 = 0;
4335         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4336         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_GET_INFO);
4337         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(el_info_h);
4338         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4339 
4340         if (megasas_issue_blocked_cmd(instance, cmd, 30))
4341                 dev_err(&instance->pdev->dev, "Command timedout"
4342                         "from %s\n", __func__);
4343         else {
4344                 /*
4345                  * Copy the data back into callers buffer
4346                  */
4347                 eli->newest_seq_num = le32_to_cpu(el_info->newest_seq_num);
4348                 eli->oldest_seq_num = le32_to_cpu(el_info->oldest_seq_num);
4349                 eli->clear_seq_num = le32_to_cpu(el_info->clear_seq_num);
4350                 eli->shutdown_seq_num = le32_to_cpu(el_info->shutdown_seq_num);
4351                 eli->boot_seq_num = le32_to_cpu(el_info->boot_seq_num);
4352         }
4353 
4354         pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
4355                             el_info, el_info_h);
4356 
4357         megasas_return_cmd(instance, cmd);
4358 
4359         return 0;
4360 }
4361 
4362 /**
4363  * megasas_register_aen -       Registers for asynchronous event notification
4364  * @instance:                   Adapter soft state
4365  * @seq_num:                    The starting sequence number
4366  * @class_locale:               Class of the event
4367  *
4368  * This function subscribes for AEN for events beyond the @seq_num. It requests
4369  * to be notified if and only if the event is of type @class_locale
4370  */
4371 static int
4372 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
4373                      u32 class_locale_word)
4374 {
4375         int ret_val;
4376         struct megasas_cmd *cmd;
4377         struct megasas_dcmd_frame *dcmd;
4378         union megasas_evt_class_locale curr_aen;
4379         union megasas_evt_class_locale prev_aen;
4380 
4381         /*
4382          * If there an AEN pending already (aen_cmd), check if the
4383          * class_locale of that pending AEN is inclusive of the new
4384          * AEN request we currently have. If it is, then we don't have
4385          * to do anything. In other words, whichever events the current
4386          * AEN request is subscribing to, have already been subscribed
4387          * to.
4388          *
4389          * If the old_cmd is _not_ inclusive, then we have to abort
4390          * that command, form a class_locale that is superset of both
4391          * old and current and re-issue to the FW
4392          */
4393 
4394         curr_aen.word = class_locale_word;
4395 
4396         if (instance->aen_cmd) {
4397 
4398                 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
4399                 prev_aen.members.locale = le16_to_cpu(prev_aen.members.locale);
4400 
4401                 /*
4402                  * A class whose enum value is smaller is inclusive of all
4403                  * higher values. If a PROGRESS (= -1) was previously
4404                  * registered, then a new registration requests for higher
4405                  * classes need not be sent to FW. They are automatically
4406                  * included.
4407                  *
4408                  * Locale numbers don't have such hierarchy. They are bitmap
4409                  * values
4410                  */
4411                 if ((prev_aen.members.class <= curr_aen.members.class) &&
4412                     !((prev_aen.members.locale & curr_aen.members.locale) ^
4413                       curr_aen.members.locale)) {
4414                         /*
4415                          * Previously issued event registration includes
4416                          * current request. Nothing to do.
4417                          */
4418                         return 0;
4419                 } else {
4420                         curr_aen.members.locale |= prev_aen.members.locale;
4421 
4422                         if (prev_aen.members.class < curr_aen.members.class)
4423                                 curr_aen.members.class = prev_aen.members.class;
4424 
4425                         instance->aen_cmd->abort_aen = 1;
4426                         ret_val = megasas_issue_blocked_abort_cmd(instance,
4427                                                                   instance->
4428                                                                   aen_cmd, 30);
4429 
4430                         if (ret_val) {
4431                                 printk(KERN_DEBUG "megasas: Failed to abort "
4432                                        "previous AEN command\n");
4433                                 return ret_val;
4434                         }
4435                 }
4436         }
4437 
4438         cmd = megasas_get_cmd(instance);
4439 
4440         if (!cmd)
4441                 return -ENOMEM;
4442 
4443         dcmd = &cmd->frame->dcmd;
4444 
4445         memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
4446 
4447         /*
4448          * Prepare DCMD for aen registration
4449          */
4450         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4451 
4452         dcmd->cmd = MFI_CMD_DCMD;
4453         dcmd->cmd_status = 0x0;
4454         dcmd->sge_count = 1;
4455         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4456         dcmd->timeout = 0;
4457         dcmd->pad_0 = 0;
4458         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_detail));
4459         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_WAIT);
4460         dcmd->mbox.w[0] = cpu_to_le32(seq_num);
4461         instance->last_seq_num = seq_num;
4462         dcmd->mbox.w[1] = cpu_to_le32(curr_aen.word);
4463         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->evt_detail_h);
4464         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_detail));
4465 
4466         if (instance->aen_cmd != NULL) {
4467                 megasas_return_cmd(instance, cmd);
4468                 return 0;
4469         }
4470 
4471         /*
4472          * Store reference to the cmd used to register for AEN. When an
4473          * application wants us to register for AEN, we have to abort this
4474          * cmd and re-register with a new EVENT LOCALE supplied by that app
4475          */
4476         instance->aen_cmd = cmd;
4477 
4478         /*
4479          * Issue the aen registration frame
4480          */
4481         instance->instancet->issue_dcmd(instance, cmd);
4482 
4483         return 0;
4484 }
4485 
4486 /**
4487  * megasas_start_aen -  Subscribes to AEN during driver load time
4488  * @instance:           Adapter soft state
4489  */
4490 static int megasas_start_aen(struct megasas_instance *instance)
4491 {
4492         struct megasas_evt_log_info eli;
4493         union megasas_evt_class_locale class_locale;
4494 
4495         /*
4496          * Get the latest sequence number from FW
4497          */
4498         memset(&eli, 0, sizeof(eli));
4499 
4500         if (megasas_get_seq_num(instance, &eli))
4501                 return -1;
4502 
4503         /*
4504          * Register AEN with FW for latest sequence number plus 1
4505          */
4506         class_locale.members.reserved = 0;
4507         class_locale.members.locale = MR_EVT_LOCALE_ALL;
4508         class_locale.members.class = MR_EVT_CLASS_DEBUG;
4509 
4510         return megasas_register_aen(instance,
4511                         eli.newest_seq_num + 1,
4512                         class_locale.word);
4513 }
4514 
4515 /**
4516  * megasas_io_attach -  Attaches this driver to SCSI mid-layer
4517  * @instance:           Adapter soft state
4518  */
4519 static int megasas_io_attach(struct megasas_instance *instance)
4520 {
4521         struct Scsi_Host *host = instance->host;
4522 
4523         /*
4524          * Export parameters required by SCSI mid-layer
4525          */
4526         host->irq = instance->pdev->irq;
4527         host->unique_id = instance->unique_id;
4528         if (instance->is_imr) {
4529                 host->can_queue =
4530                         instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
4531         } else
4532                 host->can_queue =
4533                         instance->max_fw_cmds - MEGASAS_INT_CMDS;
4534         host->this_id = instance->init_id;
4535         host->sg_tablesize = instance->max_num_sge;
4536 
4537         if (instance->fw_support_ieee)
4538                 instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
4539 
4540         /*
4541          * Check if the module parameter value for max_sectors can be used
4542          */
4543         if (max_sectors && max_sectors < instance->max_sectors_per_req)
4544                 instance->max_sectors_per_req = max_sectors;
4545         else {
4546                 if (max_sectors) {
4547                         if (((instance->pdev->device ==
4548                                 PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
4549                                 (instance->pdev->device ==
4550                                 PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
4551                                 (max_sectors <= MEGASAS_MAX_SECTORS)) {
4552                                 instance->max_sectors_per_req = max_sectors;
4553                         } else {
4554                         printk(KERN_INFO "megasas: max_sectors should be > 0"
4555                                 "and <= %d (or < 1MB for GEN2 controller)\n",
4556                                 instance->max_sectors_per_req);
4557                         }
4558                 }
4559         }
4560 
4561         host->max_sectors = instance->max_sectors_per_req;
4562         host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
4563         host->max_channel = MEGASAS_MAX_CHANNELS - 1;
4564         host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
4565         host->max_lun = MEGASAS_MAX_LUN;
4566         host->max_cmd_len = 16;
4567 
4568         /* Fusion only supports host reset */
4569         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4570             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
4571             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
4572             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4573                 host->hostt->eh_device_reset_handler = NULL;
4574                 host->hostt->eh_bus_reset_handler = NULL;
4575         }
4576 
4577         /*
4578          * Notify the mid-layer about the new controller
4579          */
4580         if (scsi_add_host(host, &instance->pdev->dev)) {
4581                 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
4582                 return -ENODEV;
4583         }
4584 
4585         /*
4586          * Trigger SCSI to scan our drives
4587          */
4588         scsi_scan_host(host);
4589         return 0;
4590 }
4591 
4592 static int
4593 megasas_set_dma_mask(struct pci_dev *pdev)
4594 {
4595         /*
4596          * All our contollers are capable of performing 64-bit DMA
4597          */
4598         if (IS_DMA64) {
4599                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
4600 
4601                         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4602                                 goto fail_set_dma_mask;
4603                 }
4604         } else {
4605                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4606                         goto fail_set_dma_mask;
4607         }
4608         /*
4609          * Ensure that all data structures are allocated in 32-bit
4610          * memory.
4611          */
4612         if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
4613                 /* Try 32bit DMA mask and 32 bit Consistent dma mask */
4614                 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
4615                         && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
4616                         dev_info(&pdev->dev, "set 32bit DMA mask"
4617                                 "and 32 bit consistent mask\n");
4618                 else
4619                         goto fail_set_dma_mask;
4620         }
4621 
4622         return 0;
4623 
4624 fail_set_dma_mask:
4625         return 1;
4626 }
4627 
4628 /**
4629  * megasas_probe_one -  PCI hotplug entry point
4630  * @pdev:               PCI device structure
4631  * @id:                 PCI ids of supported hotplugged adapter
4632  */
4633 static int megasas_probe_one(struct pci_dev *pdev,
4634                              const struct pci_device_id *id)
4635 {
4636         int rval, pos, i, j, cpu;
4637         struct Scsi_Host *host;
4638         struct megasas_instance *instance;
4639         u16 control = 0;
4640 
4641         /* Reset MSI-X in the kdump kernel */
4642         if (reset_devices) {
4643                 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4644                 if (pos) {
4645                         pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS,
4646                                              &control);
4647                         if (control & PCI_MSIX_FLAGS_ENABLE) {
4648                                 dev_info(&pdev->dev, "resetting MSI-X\n");
4649                                 pci_write_config_word(pdev,
4650                                                       pos + PCI_MSIX_FLAGS,
4651                                                       control &
4652                                                       ~PCI_MSIX_FLAGS_ENABLE);
4653                         }
4654                 }
4655         }
4656 
4657         /*
4658          * Announce PCI information
4659          */
4660         printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
4661                pdev->vendor, pdev->device, pdev->subsystem_vendor,
4662                pdev->subsystem_device);
4663 
4664         printk("bus %d:slot %d:func %d\n",
4665                pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
4666 
4667         /*
4668          * PCI prepping: enable device set bus mastering and dma mask
4669          */
4670         rval = pci_enable_device_mem(pdev);
4671 
4672         if (rval) {
4673                 return rval;
4674         }
4675 
4676         pci_set_master(pdev);
4677 
4678         if (megasas_set_dma_mask(pdev))
4679                 goto fail_set_dma_mask;
4680 
4681         host = scsi_host_alloc(&megasas_template,
4682                                sizeof(struct megasas_instance));
4683 
4684         if (!host) {
4685                 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
4686                 goto fail_alloc_instance;
4687         }
4688 
4689         instance = (struct megasas_instance *)host->hostdata;
4690         memset(instance, 0, sizeof(*instance));
4691         atomic_set( &instance->fw_reset_no_pci_access, 0 );
4692         instance->pdev = pdev;
4693 
4694         switch (instance->pdev->device) {
4695         case PCI_DEVICE_ID_LSI_FUSION:
4696         case PCI_DEVICE_ID_LSI_PLASMA:
4697         case PCI_DEVICE_ID_LSI_INVADER:
4698         case PCI_DEVICE_ID_LSI_FURY:
4699         {
4700                 struct fusion_context *fusion;
4701 
4702                 instance->ctrl_context =
4703                         kzalloc(sizeof(struct fusion_context), GFP_KERNEL);
4704                 if (!instance->ctrl_context) {
4705                         printk(KERN_DEBUG "megasas: Failed to allocate "
4706                                "memory for Fusion context info\n");
4707                         goto fail_alloc_dma_buf;
4708                 }
4709                 fusion = instance->ctrl_context;
4710                 INIT_LIST_HEAD(&fusion->cmd_pool);
4711                 spin_lock_init(&fusion->cmd_pool_lock);
4712         }
4713         break;
4714         default: /* For all other supported controllers */
4715 
4716                 instance->producer =
4717                         pci_alloc_consistent(pdev, sizeof(u32),
4718                                              &instance->producer_h);
4719                 instance->consumer =
4720                         pci_alloc_consistent(pdev, sizeof(u32),
4721                                              &instance->consumer_h);
4722 
4723                 if (!instance->producer || !instance->consumer) {
4724                         printk(KERN_DEBUG "megasas: Failed to allocate"
4725                                "memory for producer, consumer\n");
4726                         goto fail_alloc_dma_buf;
4727                 }
4728 
4729                 *instance->producer = 0;
4730                 *instance->consumer = 0;
4731                 break;
4732         }
4733 
4734         megasas_poll_wait_aen = 0;
4735         instance->flag_ieee = 0;
4736         instance->ev = NULL;
4737         instance->issuepend_done = 1;
4738         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
4739         instance->is_imr = 0;
4740         megasas_poll_wait_aen = 0;
4741 
4742         instance->evt_detail = pci_alloc_consistent(pdev,
4743                                                     sizeof(struct
4744                                                            megasas_evt_detail),
4745                                                     &instance->evt_detail_h);
4746 
4747         if (!instance->evt_detail) {
4748                 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
4749                        "event detail structure\n");
4750                 goto fail_alloc_dma_buf;
4751         }
4752 
4753         /*
4754          * Initialize locks and queues
4755          */
4756         INIT_LIST_HEAD(&instance->cmd_pool);
4757         INIT_LIST_HEAD(&instance->internal_reset_pending_q);
4758 
4759         atomic_set(&instance->fw_outstanding,0);
4760 
4761         init_waitqueue_head(&instance->int_cmd_wait_q);
4762         init_waitqueue_head(&instance->abort_cmd_wait_q);
4763 
4764         spin_lock_init(&instance->cmd_pool_lock);
4765         spin_lock_init(&instance->hba_lock);
4766         spin_lock_init(&instance->completion_lock);
4767 
4768         mutex_init(&instance->aen_mutex);
4769         mutex_init(&instance->reset_mutex);
4770 
4771         /*
4772          * Initialize PCI related and misc parameters
4773          */
4774         instance->host = host;
4775         instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
4776         instance->init_id = MEGASAS_DEFAULT_INIT_ID;
4777 
4778         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
4779                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
4780                 instance->flag_ieee = 1;
4781                 sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
4782         } else
4783                 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
4784 
4785         megasas_dbg_lvl = 0;
4786         instance->flag = 0;
4787         instance->unload = 1;
4788         instance->last_time = 0;
4789         instance->disableOnlineCtrlReset = 1;
4790         instance->UnevenSpanSupport = 0;
4791 
4792         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4793             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
4794             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
4795             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
4796                 INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
4797         else
4798                 INIT_WORK(&instance->work_init, process_fw_state_change_wq);
4799 
4800         /*
4801          * Initialize MFI Firmware
4802          */
4803         if (megasas_init_fw(instance))
4804                 goto fail_init_mfi;
4805 
4806         if (instance->requestorId) {
4807                 if (instance->PlasmaFW111) {
4808                         instance->vf_affiliation_111 =
4809                                 pci_alloc_consistent(pdev, sizeof(struct MR_LD_VF_AFFILIATION_111),
4810                                                      &instance->vf_affiliation_111_h);
4811                         if (!instance->vf_affiliation_111)
4812                                 printk(KERN_WARNING "megasas: Can't allocate "
4813                                        "memory for VF affiliation buffer\n");
4814                 } else {
4815                         instance->vf_affiliation =
4816                                 pci_alloc_consistent(pdev,
4817                                                      (MAX_LOGICAL_DRIVES + 1) *
4818                                                      sizeof(struct MR_LD_VF_AFFILIATION),
4819                                                      &instance->vf_affiliation_h);
4820                         if (!instance->vf_affiliation)
4821                                 printk(KERN_WARNING "megasas: Can't allocate "
4822                                        "memory for VF affiliation buffer\n");
4823                 }
4824         }
4825 
4826 retry_irq_register:
4827         /*
4828          * Register IRQ
4829          */
4830         if (instance->msix_vectors) {
4831                 cpu = cpumask_first(cpu_online_mask);
4832                 for (i = 0; i < instance->msix_vectors; i++) {
4833                         instance->irq_context[i].instance = instance;
4834                         instance->irq_context[i].MSIxIndex = i;
4835                         if (request_irq(instance->msixentry[i].vector,
4836                                         instance->instancet->service_isr, 0,
4837                                         "megasas",
4838                                         &instance->irq_context[i])) {
4839                                 printk(KERN_DEBUG "megasas: Failed to "
4840                                        "register IRQ for vector %d.\n", i);
4841                                 for (j = 0; j < i; j++) {
4842                                         irq_set_affinity_hint(
4843                                                 instance->msixentry[j].vector, NULL);
4844                                         free_irq(
4845                                                 instance->msixentry[j].vector,
4846                                                 &instance->irq_context[j]);
4847                                 }
4848                                 /* Retry irq register for IO_APIC */
4849                                 instance->msix_vectors = 0;
4850                                 goto retry_irq_register;
4851                         }
4852                         if (irq_set_affinity_hint(instance->msixentry[i].vector,
4853                                 get_cpu_mask(cpu)))
4854                                 dev_err(&instance->pdev->dev, "Error setting"
4855                                         "affinity hint for cpu %d\n", cpu);
4856                         cpu = cpumask_next(cpu, cpu_online_mask);
4857                 }
4858         } else {
4859                 instance->irq_context[0].instance = instance;
4860                 instance->irq_context[0].MSIxIndex = 0;
4861                 if (request_irq(pdev->irq, instance->instancet->service_isr,
4862                                 IRQF_SHARED, "megasas",
4863                                 &instance->irq_context[0])) {
4864                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
4865                         goto fail_irq;
4866                 }
4867         }
4868 
4869         instance->instancet->enable_intr(instance);
4870 
4871         /*
4872          * Store instance in PCI softstate
4873          */
4874         pci_set_drvdata(pdev, instance);
4875 
4876         /*
4877          * Add this controller to megasas_mgmt_info structure so that it
4878          * can be exported to management applications
4879          */
4880         megasas_mgmt_info.count++;
4881         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
4882         megasas_mgmt_info.max_index++;
4883 
4884         /*
4885          * Register with SCSI mid-layer
4886          */
4887         if (megasas_io_attach(instance))
4888                 goto fail_io_attach;
4889 
4890         instance->unload = 0;
4891 
4892         /*
4893          * Initiate AEN (Asynchronous Event Notification)
4894          */
4895         if (megasas_start_aen(instance)) {
4896                 printk(KERN_DEBUG "megasas: start aen failed\n");
4897                 goto fail_start_aen;
4898         }
4899 
4900         return 0;
4901 
4902       fail_start_aen:
4903       fail_io_attach:
4904         megasas_mgmt_info.count--;
4905         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
4906         megasas_mgmt_info.max_index--;
4907 
4908         instance->instancet->disable_intr(instance);
4909         if (instance->msix_vectors)
4910                 for (i = 0; i < instance->msix_vectors; i++) {
4911                         irq_set_affinity_hint(
4912                                 instance->msixentry[i].vector, NULL);
4913                         free_irq(instance->msixentry[i].vector,
4914                                  &instance->irq_context[i]);
4915                 }
4916         else
4917                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
4918 fail_irq:
4919         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4920             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
4921             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
4922             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
4923                 megasas_release_fusion(instance);
4924         else
4925                 megasas_release_mfi(instance);
4926       fail_init_mfi:
4927         if (instance->msix_vectors)
4928                 pci_disable_msix(instance->pdev);
4929       fail_alloc_dma_buf:
4930         if (instance->evt_detail)
4931                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
4932                                     instance->evt_detail,
4933                                     instance->evt_detail_h);
4934 
4935         if (instance->producer)
4936                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
4937                                     instance->producer_h);
4938         if (instance->consumer)
4939                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
4940                                     instance->consumer_h);
4941         scsi_host_put(host);
4942 
4943       fail_alloc_instance:
4944       fail_set_dma_mask:
4945         pci_disable_device(pdev);
4946 
4947         return -ENODEV;
4948 }
4949 
4950 /**
4951  * megasas_flush_cache -        Requests FW to flush all its caches
4952  * @instance:                   Adapter soft state
4953  */
4954 static void megasas_flush_cache(struct megasas_instance *instance)
4955 {
4956         struct megasas_cmd *cmd;
4957         struct megasas_dcmd_frame *dcmd;
4958 
4959         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
4960                 return;
4961 
4962         cmd = megasas_get_cmd(instance);
4963 
4964         if (!cmd)
4965                 return;
4966 
4967         dcmd = &cmd->frame->dcmd;
4968 
4969         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4970 
4971         dcmd->cmd = MFI_CMD_DCMD;
4972         dcmd->cmd_status = 0x0;
4973         dcmd->sge_count = 0;
4974         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
4975         dcmd->timeout = 0;
4976         dcmd->pad_0 = 0;
4977         dcmd->data_xfer_len = 0;
4978         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_CACHE_FLUSH);
4979         dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
4980 
4981         if (megasas_issue_blocked_cmd(instance, cmd, 30))
4982                 dev_err(&instance->pdev->dev, "Command timedout"
4983                         " from %s\n", __func__);
4984 
4985         megasas_return_cmd(instance, cmd);
4986 
4987         return;
4988 }
4989 
4990 /**
4991  * megasas_shutdown_controller -        Instructs FW to shutdown the controller
4992  * @instance:                           Adapter soft state
4993  * @opcode:                             Shutdown/Hibernate
4994  */
4995 static void megasas_shutdown_controller(struct megasas_instance *instance,
4996                                         u32 opcode)
4997 {
4998         struct megasas_cmd *cmd;
4999         struct megasas_dcmd_frame *dcmd;
5000 
5001         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5002                 return;
5003 
5004         cmd = megasas_get_cmd(instance);
5005 
5006         if (!cmd)
5007                 return;
5008 
5009         if (instance->aen_cmd)
5010                 megasas_issue_blocked_abort_cmd(instance,
5011                         instance->aen_cmd, 30);
5012         if (instance->map_update_cmd)
5013                 megasas_issue_blocked_abort_cmd(instance,
5014                         instance->map_update_cmd, 30);
5015         dcmd = &cmd->frame->dcmd;
5016 
5017         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5018 
5019         dcmd->cmd = MFI_CMD_DCMD;
5020         dcmd->cmd_status = 0x0;
5021         dcmd->sge_count = 0;
5022         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5023         dcmd->timeout = 0;
5024         dcmd->pad_0 = 0;
5025         dcmd->data_xfer_len = 0;
5026         dcmd->opcode = cpu_to_le32(opcode);
5027 
5028         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5029                 dev_err(&instance->pdev->dev, "Command timedout"
5030                         "from %s\n", __func__);
5031 
5032         megasas_return_cmd(instance, cmd);
5033 
5034         return;
5035 }
5036 
5037 #ifdef CONFIG_PM
5038 /**
5039  * megasas_suspend -    driver suspend entry point
5040  * @pdev:               PCI device structure
5041  * @state:              PCI power state to suspend routine
5042  */
5043 static int
5044 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
5045 {
5046         struct Scsi_Host *host;
5047         struct megasas_instance *instance;
5048         int i;
5049 
5050         instance = pci_get_drvdata(pdev);
5051         host = instance->host;
5052         instance->unload = 1;
5053 
5054         /* Shutdown SR-IOV heartbeat timer */
5055         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5056                 del_timer_sync(&instance->sriov_heartbeat_timer);
5057 
5058         megasas_flush_cache(instance);
5059         megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
5060 
5061         /* cancel the delayed work if this work still in queue */
5062         if (instance->ev != NULL) {
5063                 struct megasas_aen_event *ev = instance->ev;
5064                 cancel_delayed_work_sync(&ev->hotplug_work);
5065                 instance->ev = NULL;
5066         }
5067 
5068         tasklet_kill(&instance->isr_tasklet);
5069 
5070         pci_set_drvdata(instance->pdev, instance);
5071         instance->instancet->disable_intr(instance);
5072 
5073         if (instance->msix_vectors)
5074                 for (i = 0; i < instance->msix_vectors; i++) {
5075                         irq_set_affinity_hint(
5076                                 instance->msixentry[i].vector, NULL);
5077                         free_irq(instance->msixentry[i].vector,
5078                                  &instance->irq_context[i]);
5079                 }
5080         else
5081                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5082         if (instance->msix_vectors)
5083                 pci_disable_msix(instance->pdev);
5084 
5085         pci_save_state(pdev);
5086         pci_disable_device(pdev);
5087 
5088         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5089 
5090         return 0;
5091 }
5092 
5093 /**
5094  * megasas_resume-      driver resume entry point
5095  * @pdev:               PCI device structure
5096  */
5097 static int
5098 megasas_resume(struct pci_dev *pdev)
5099 {
5100         int rval, i, j, cpu;
5101         struct Scsi_Host *host;
5102         struct megasas_instance *instance;
5103 
5104         instance = pci_get_drvdata(pdev);
5105         host = instance->host;
5106         pci_set_power_state(pdev, PCI_D0);
5107         pci_enable_wake(pdev, PCI_D0, 0);
5108         pci_restore_state(pdev);
5109 
5110         /*
5111          * PCI prepping: enable device set bus mastering and dma mask
5112          */
5113         rval = pci_enable_device_mem(pdev);
5114 
5115         if (rval) {
5116                 printk(KERN_ERR "megasas: Enable device failed\n");
5117                 return rval;
5118         }
5119 
5120         pci_set_master(pdev);
5121 
5122         if (megasas_set_dma_mask(pdev))
5123                 goto fail_set_dma_mask;
5124 
5125         /*
5126          * Initialize MFI Firmware
5127          */
5128 
5129         atomic_set(&instance->fw_outstanding, 0);
5130 
5131         /*
5132          * We expect the FW state to be READY
5133          */
5134         if (megasas_transition_to_ready(instance, 0))
5135                 goto fail_ready_state;
5136 
5137         /* Now re-enable MSI-X */
5138         if (instance->msix_vectors)
5139                 pci_enable_msix(instance->pdev, instance->msixentry,
5140                                 instance->msix_vectors);
5141 
5142         switch (instance->pdev->device) {
5143         case PCI_DEVICE_ID_LSI_FUSION:
5144         case PCI_DEVICE_ID_LSI_PLASMA:
5145         case PCI_DEVICE_ID_LSI_INVADER:
5146         case PCI_DEVICE_ID_LSI_FURY:
5147         {
5148                 megasas_reset_reply_desc(instance);
5149                 if (megasas_ioc_init_fusion(instance)) {
5150                         megasas_free_cmds(instance);
5151                         megasas_free_cmds_fusion(instance);
5152                         goto fail_init_mfi;
5153                 }
5154                 if (!megasas_get_map_info(instance))
5155                         megasas_sync_map_info(instance);
5156         }
5157         break;
5158         default:
5159                 *instance->producer = 0;
5160                 *instance->consumer = 0;
5161                 if (megasas_issue_init_mfi(instance))
5162                         goto fail_init_mfi;
5163                 break;
5164         }
5165 
5166         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
5167                      (unsigned long)instance);
5168 
5169         /*
5170          * Register IRQ
5171          */
5172         if (instance->msix_vectors) {
5173                 cpu = cpumask_first(cpu_online_mask);
5174                 for (i = 0 ; i < instance->msix_vectors; i++) {
5175                         instance->irq_context[i].instance = instance;
5176                         instance->irq_context[i].MSIxIndex = i;
5177                         if (request_irq(instance->msixentry[i].vector,
5178                                         instance->instancet->service_isr, 0,
5179                                         "megasas",
5180                                         &instance->irq_context[i])) {
5181                                 printk(KERN_DEBUG "megasas: Failed to "
5182                                        "register IRQ for vector %d.\n", i);
5183                                 for (j = 0; j < i; j++) {
5184                                         irq_set_affinity_hint(
5185                                                 instance->msixentry[j].vector, NULL);
5186                                         free_irq(
5187                                                 instance->msixentry[j].vector,
5188                                                 &instance->irq_context[j]);
5189                                 }
5190                                 goto fail_irq;
5191                         }
5192 
5193                         if (irq_set_affinity_hint(instance->msixentry[i].vector,
5194                                 get_cpu_mask(cpu)))
5195                                 dev_err(&instance->pdev->dev, "Error setting"
5196                                         "affinity hint for cpu %d\n", cpu);
5197                         cpu = cpumask_next(cpu, cpu_online_mask);
5198                 }
5199         } else {
5200                 instance->irq_context[0].instance = instance;
5201                 instance->irq_context[0].MSIxIndex = 0;
5202                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5203                                 IRQF_SHARED, "megasas",
5204                                 &instance->irq_context[0])) {
5205                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5206                         goto fail_irq;
5207                 }
5208         }
5209 
5210         /* Re-launch SR-IOV heartbeat timer */
5211         if (instance->requestorId) {
5212                 if (!megasas_sriov_start_heartbeat(instance, 0))
5213                         megasas_start_timer(instance,
5214                                             &instance->sriov_heartbeat_timer,
5215                                             megasas_sriov_heartbeat_handler,
5216                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
5217                 else
5218                         instance->skip_heartbeat_timer_del = 1;
5219         }
5220 
5221         instance->instancet->enable_intr(instance);
5222         instance->unload = 0;
5223 
5224         /*
5225          * Initiate AEN (Asynchronous Event Notification)
5226          */
5227         if (megasas_start_aen(instance))
5228                 printk(KERN_ERR "megasas: Start AEN failed\n");
5229 
5230         return 0;
5231 
5232 fail_irq:
5233 fail_init_mfi:
5234         if (instance->evt_detail)
5235                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5236                                 instance->evt_detail,
5237                                 instance->evt_detail_h);
5238 
5239         if (instance->producer)
5240                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5241                                 instance->producer_h);
5242         if (instance->consumer)
5243                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5244                                 instance->consumer_h);
5245         scsi_host_put(host);
5246 
5247 fail_set_dma_mask:
5248 fail_ready_state:
5249 
5250         pci_disable_device(pdev);
5251 
5252         return -ENODEV;
5253 }
5254 #else
5255 #define megasas_suspend NULL
5256 #define megasas_resume  NULL
5257 #endif
5258 
5259 /**
5260  * megasas_detach_one - PCI hot"un"plug entry point
5261  * @pdev:               PCI device structure
5262  */
5263 static void megasas_detach_one(struct pci_dev *pdev)
5264 {
5265         int i;
5266         struct Scsi_Host *host;
5267         struct megasas_instance *instance;
5268         struct fusion_context *fusion;
5269 
5270         instance = pci_get_drvdata(pdev);
5271         instance->unload = 1;
5272         host = instance->host;
5273         fusion = instance->ctrl_context;
5274 
5275         /* Shutdown SR-IOV heartbeat timer */
5276         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5277                 del_timer_sync(&instance->sriov_heartbeat_timer);
5278 
5279         scsi_remove_host(instance->host);
5280         megasas_flush_cache(instance);
5281         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5282 
5283         /* cancel the delayed work if this work still in queue*/
5284         if (instance->ev != NULL) {
5285                 struct megasas_aen_event *ev = instance->ev;
5286                 cancel_delayed_work_sync(&ev->hotplug_work);
5287                 instance->ev = NULL;
5288         }
5289 
5290         /* cancel all wait events */
5291         wake_up_all(&instance->int_cmd_wait_q);
5292 
5293         tasklet_kill(&instance->isr_tasklet);
5294 
5295         /*
5296          * Take the instance off the instance array. Note that we will not
5297          * decrement the max_index. We let this array be sparse array
5298          */
5299         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5300                 if (megasas_mgmt_info.instance[i] == instance) {
5301                         megasas_mgmt_info.count--;
5302                         megasas_mgmt_info.instance[i] = NULL;
5303 
5304                         break;
5305                 }
5306         }
5307 
5308         instance->instancet->disable_intr(instance);
5309 
5310         if (instance->msix_vectors)
5311                 for (i = 0; i < instance->msix_vectors; i++) {
5312                         irq_set_affinity_hint(
5313                                 instance->msixentry[i].vector, NULL);
5314                         free_irq(instance->msixentry[i].vector,
5315                                  &instance->irq_context[i]);
5316                 }
5317         else
5318                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5319         if (instance->msix_vectors)
5320                 pci_disable_msix(instance->pdev);
5321 
5322         switch (instance->pdev->device) {
5323         case PCI_DEVICE_ID_LSI_FUSION:
5324         case PCI_DEVICE_ID_LSI_PLASMA:
5325         case PCI_DEVICE_ID_LSI_INVADER:
5326         case PCI_DEVICE_ID_LSI_FURY:
5327                 megasas_release_fusion(instance);
5328                 for (i = 0; i < 2 ; i++)
5329                         if (fusion->ld_map[i])
5330                                 dma_free_coherent(&instance->pdev->dev,
5331                                                   fusion->map_sz,
5332                                                   fusion->ld_map[i],
5333                                                   fusion->
5334                                                   ld_map_phys[i]);
5335                 kfree(instance->ctrl_context);
5336                 break;
5337         default:
5338                 megasas_release_mfi(instance);
5339                 pci_free_consistent(pdev, sizeof(u32),
5340                                     instance->producer,
5341                                     instance->producer_h);
5342                 pci_free_consistent(pdev, sizeof(u32),
5343                                     instance->consumer,
5344                                     instance->consumer_h);
5345                 break;
5346         }
5347 
5348         if (instance->evt_detail)
5349                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5350                                 instance->evt_detail, instance->evt_detail_h);
5351 
5352         if (instance->vf_affiliation)
5353                 pci_free_consistent(pdev, (MAX_LOGICAL_DRIVES + 1) *
5354                                     sizeof(struct MR_LD_VF_AFFILIATION),
5355                                     instance->vf_affiliation,
5356                                     instance->vf_affiliation_h);
5357 
5358         if (instance->vf_affiliation_111)
5359                 pci_free_consistent(pdev,
5360                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
5361                                     instance->vf_affiliation_111,
5362                                     instance->vf_affiliation_111_h);
5363 
5364         if (instance->hb_host_mem)
5365                 pci_free_consistent(pdev, sizeof(struct MR_CTRL_HB_HOST_MEM),
5366                                     instance->hb_host_mem,
5367                                     instance->hb_host_mem_h);
5368 
5369         scsi_host_put(host);
5370 
5371         pci_disable_device(pdev);
5372 
5373         return;
5374 }
5375 
5376 /**
5377  * megasas_shutdown -   Shutdown entry point
5378  * @device:             Generic device structure
5379  */
5380 static void megasas_shutdown(struct pci_dev *pdev)
5381 {
5382         int i;
5383         struct megasas_instance *instance = pci_get_drvdata(pdev);
5384 
5385         instance->unload = 1;
5386         megasas_flush_cache(instance);
5387         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5388         instance->instancet->disable_intr(instance);
5389         if (instance->msix_vectors)
5390                 for (i = 0; i < instance->msix_vectors; i++) {
5391                         irq_set_affinity_hint(
5392                                 instance->msixentry[i].vector, NULL);
5393                         free_irq(instance->msixentry[i].vector,
5394                                  &instance->irq_context[i]);
5395                 }
5396         else
5397                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5398         if (instance->msix_vectors)
5399                 pci_disable_msix(instance->pdev);
5400 }
5401 
5402 /**
5403  * megasas_mgmt_open -  char node "open" entry point
5404  */
5405 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
5406 {
5407         /*
5408          * Allow only those users with admin rights
5409          */
5410         if (!capable(CAP_SYS_ADMIN))
5411                 return -EACCES;
5412 
5413         return 0;
5414 }
5415 
5416 /**
5417  * megasas_mgmt_fasync -        Async notifier registration from applications
5418  *
5419  * This function adds the calling process to a driver global queue. When an
5420  * event occurs, SIGIO will be sent to all processes in this queue.
5421  */
5422 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
5423 {
5424         int rc;
5425 
5426         mutex_lock(&megasas_async_queue_mutex);
5427 
5428         rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
5429 
5430         mutex_unlock(&megasas_async_queue_mutex);
5431 
5432         if (rc >= 0) {
5433                 /* For sanity check when we get ioctl */
5434                 filep->private_data = filep;
5435                 return 0;
5436         }
5437 
5438         printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
5439 
5440         return rc;
5441 }
5442 
5443 /**
5444  * megasas_mgmt_poll -  char node "poll" entry point
5445  * */
5446 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
5447 {
5448         unsigned int mask;
5449         unsigned long flags;
5450         poll_wait(file, &megasas_poll_wait, wait);
5451         spin_lock_irqsave(&poll_aen_lock, flags);
5452         if (megasas_poll_wait_aen)
5453                 mask =   (POLLIN | POLLRDNORM);
5454         else
5455                 mask = 0;
5456         spin_unlock_irqrestore(&poll_aen_lock, flags);
5457         return mask;
5458 }
5459 
5460 /**
5461  * megasas_mgmt_fw_ioctl -      Issues management ioctls to FW
5462  * @instance:                   Adapter soft state
5463  * @argp:                       User's ioctl packet
5464  */
5465 static int
5466 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
5467                       struct megasas_iocpacket __user * user_ioc,
5468                       struct megasas_iocpacket *ioc)
5469 {
5470         struct megasas_sge32 *kern_sge32;
5471         struct megasas_cmd *cmd;
5472         void *kbuff_arr[MAX_IOCTL_SGE];
5473         dma_addr_t buf_handle = 0;
5474         int error = 0, i;
5475         void *sense = NULL;
5476         dma_addr_t sense_handle;
5477         unsigned long *sense_ptr;
5478 
5479         memset(kbuff_arr, 0, sizeof(kbuff_arr));
5480 
5481         if (ioc->sge_count > MAX_IOCTL_SGE) {
5482                 printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
5483                        ioc->sge_count, MAX_IOCTL_SGE);
5484                 return -EINVAL;
5485         }
5486 
5487         cmd = megasas_get_cmd(instance);
5488         if (!cmd) {
5489                 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
5490                 return -ENOMEM;
5491         }
5492 
5493         /*
5494          * User's IOCTL packet has 2 frames (maximum). Copy those two
5495          * frames into our cmd's frames. cmd->frame's context will get
5496          * overwritten when we copy from user's frames. So set that value
5497          * alone separately
5498          */
5499         memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
5500         cmd->frame->hdr.context = cpu_to_le32(cmd->index);
5501         cmd->frame->hdr.pad_0 = 0;
5502         cmd->frame->hdr.flags &= cpu_to_le16(~(MFI_FRAME_IEEE |
5503                                                MFI_FRAME_SGL64 |
5504                                                MFI_FRAME_SENSE64));
5505 
5506         /*
5507          * The management interface between applications and the fw uses
5508          * MFI frames. E.g, RAID configuration changes, LD property changes
5509          * etc are accomplishes through different kinds of MFI frames. The
5510          * driver needs to care only about substituting user buffers with
5511          * kernel buffers in SGLs. The location of SGL is embedded in the
5512          * struct iocpacket itself.
5513          */
5514         kern_sge32 = (struct megasas_sge32 *)
5515             ((unsigned long)cmd->frame + ioc->sgl_off);
5516 
5517         /*
5518          * For each user buffer, create a mirror buffer and copy in
5519          */
5520         for (i = 0; i < ioc->sge_count; i++) {
5521                 if (!ioc->sgl[i].iov_len)
5522                         continue;
5523 
5524                 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
5525                                                     ioc->sgl[i].iov_len,
5526                                                     &buf_handle, GFP_KERNEL);
5527                 if (!kbuff_arr[i]) {
5528                         printk(KERN_DEBUG "megasas: Failed to alloc "
5529                                "kernel SGL buffer for IOCTL \n");
5530                         error = -ENOMEM;
5531                         goto out;
5532                 }
5533 
5534                 /*
5535                  * We don't change the dma_coherent_mask, so
5536                  * pci_alloc_consistent only returns 32bit addresses
5537                  */
5538                 kern_sge32[i].phys_addr = cpu_to_le32(buf_handle);
5539                 kern_sge32[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
5540 
5541                 /*
5542                  * We created a kernel buffer corresponding to the
5543                  * user buffer. Now copy in from the user buffer
5544                  */
5545                 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
5546                                    (u32) (ioc->sgl[i].iov_len))) {
5547                         error = -EFAULT;
5548                         goto out;
5549                 }
5550         }
5551 
5552         if (ioc->sense_len) {
5553                 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
5554                                              &sense_handle, GFP_KERNEL);
5555                 if (!sense) {
5556                         error = -ENOMEM;
5557                         goto out;
5558                 }
5559 
5560                 sense_ptr =
5561                 (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
5562                 *sense_ptr = cpu_to_le32(sense_handle);
5563         }
5564 
5565         /*
5566          * Set the sync_cmd flag so that the ISR knows not to complete this
5567          * cmd to the SCSI mid-layer
5568          */
5569         cmd->sync_cmd = 1;
5570         megasas_issue_blocked_cmd(instance, cmd, 0);
5571         cmd->sync_cmd = 0;
5572 
5573         /*
5574          * copy out the kernel buffers to user buffers
5575          */
5576         for (i = 0; i < ioc->sge_count; i++) {
5577                 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
5578                                  ioc->sgl[i].iov_len)) {
5579                         error = -EFAULT;
5580                         goto out;
5581                 }
5582         }
5583 
5584         /*
5585          * copy out the sense
5586          */
5587         if (ioc->sense_len) {
5588                 /*
5589                  * sense_ptr points to the location that has the user
5590                  * sense buffer address
5591                  */
5592                 sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
5593                                 ioc->sense_off);
5594 
5595                 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
5596                                  sense, ioc->sense_len)) {
5597                         printk(KERN_ERR "megasas: Failed to copy out to user "
5598                                         "sense data\n");
5599                         error = -EFAULT;
5600                         goto out;
5601                 }
5602         }
5603 
5604         /*
5605          * copy the status codes returned by the fw
5606          */
5607         if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
5608                          &cmd->frame->hdr.cmd_status, sizeof(u8))) {
5609                 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
5610                 error = -EFAULT;
5611         }
5612 
5613       out:
5614         if (sense) {
5615                 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
5616                                     sense, sense_handle);
5617         }
5618 
5619         for (i = 0; i < ioc->sge_count; i++) {
5620                 if (kbuff_arr[i])
5621                         dma_free_coherent(&instance->pdev->dev,
5622                                           le32_to_cpu(kern_sge32[i].length),
5623                                           kbuff_arr[i],
5624                                           le32_to_cpu(kern_sge32[i].phys_addr));
5625         }
5626 
5627         megasas_return_cmd(instance, cmd);
5628         return error;
5629 }
5630 
5631 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
5632 {
5633         struct megasas_iocpacket __user *user_ioc =
5634             (struct megasas_iocpacket __user *)arg;
5635         struct megasas_iocpacket *ioc;
5636         struct megasas_instance *instance;
5637         int error;
5638         int i;
5639         unsigned long flags;
5640         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
5641 
5642         ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
5643         if (!ioc)
5644                 return -ENOMEM;
5645 
5646         if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
5647                 error = -EFAULT;
5648                 goto out_kfree_ioc;
5649         }
5650 
5651         instance = megasas_lookup_instance(ioc->host_no);
5652         if (!instance) {
5653                 error = -ENODEV;
5654                 goto out_kfree_ioc;
5655         }
5656 
5657         /* Adjust ioctl wait time for VF mode */
5658         if (instance->requestorId)
5659                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
5660 
5661         /* Block ioctls in VF mode */
5662         if (instance->requestorId && !allow_vf_ioctls) {
5663                 error = -ENODEV;
5664                 goto out_kfree_ioc;
5665         }
5666 
5667         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
5668                 printk(KERN_ERR "Controller in crit error\n");
5669                 error = -ENODEV;
5670                 goto out_kfree_ioc;
5671         }
5672 
5673         if (instance->unload == 1) {
5674                 error = -ENODEV;
5675                 goto out_kfree_ioc;
5676         }
5677 
5678         /*
5679          * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
5680          */
5681         if (down_interruptible(&instance->ioctl_sem)) {
5682                 error = -ERESTARTSYS;
5683                 goto out_kfree_ioc;
5684         }
5685 
5686         for (i = 0; i < wait_time; i++) {
5687 
5688                 spin_lock_irqsave(&instance->hba_lock, flags);
5689                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
5690                         spin_unlock_irqrestore(&instance->hba_lock, flags);
5691                         break;
5692                 }
5693                 spin_unlock_irqrestore(&instance->hba_lock, flags);
5694 
5695                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
5696                         printk(KERN_NOTICE "megasas: waiting"
5697                                 "for controller reset to finish\n");
5698                 }
5699 
5700                 msleep(1000);
5701         }
5702 
5703         spin_lock_irqsave(&instance->hba_lock, flags);
5704         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
5705                 spin_unlock_irqrestore(&instance->hba_lock, flags);
5706 
5707                 printk(KERN_ERR "megaraid_sas: timed out while"
5708                         "waiting for HBA to recover\n");
5709                 error = -ENODEV;
5710                 goto out_up;
5711         }
5712         spin_unlock_irqrestore(&instance->hba_lock, flags);
5713 
5714         error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
5715       out_up:
5716         up(&instance->ioctl_sem);
5717 
5718       out_kfree_ioc:
5719         kfree(ioc);
5720         return error;
5721 }
5722 
5723 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
5724 {
5725         struct megasas_instance *instance;
5726         struct megasas_aen aen;
5727         int error;
5728         int i;
5729         unsigned long flags;
5730         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
5731 
5732         if (file->private_data != file) {
5733                 printk(KERN_DEBUG "megasas: fasync_helper was not "
5734                        "called first\n");
5735                 return -EINVAL;
5736         }
5737 
5738         if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
5739                 return -EFAULT;
5740 
5741         instance = megasas_lookup_instance(aen.host_no);
5742 
5743         if (!instance)
5744                 return -ENODEV;
5745 
5746         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
5747                 return -ENODEV;
5748         }
5749 
5750         if (instance->unload == 1) {
5751                 return -ENODEV;
5752         }
5753 
5754         for (i = 0; i < wait_time; i++) {
5755 
5756                 spin_lock_irqsave(&instance->hba_lock, flags);
5757                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
5758                         spin_unlock_irqrestore(&instance->hba_lock,
5759                                                 flags);
5760                         break;
5761                 }
5762 
5763                 spin_unlock_irqrestore(&instance->hba_lock, flags);
5764 
5765                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
5766                         printk(KERN_NOTICE "megasas: waiting for"
5767                                 "controller reset to finish\n");
5768                 }
5769 
5770                 msleep(1000);
5771         }
5772 
5773         spin_lock_irqsave(&instance->hba_lock, flags);
5774         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
5775                 spin_unlock_irqrestore(&instance->hba_lock, flags);
5776                 printk(KERN_ERR "megaraid_sas: timed out while waiting"
5777                                 "for HBA to recover.\n");
5778                 return -ENODEV;
5779         }
5780         spin_unlock_irqrestore(&instance->hba_lock, flags);
5781 
5782         mutex_lock(&instance->aen_mutex);
5783         error = megasas_register_aen(instance, aen.seq_num,
5784                                      aen.class_locale_word);
5785         mutex_unlock(&instance->aen_mutex);
5786         return error;
5787 }
5788 
5789 /**
5790  * megasas_mgmt_ioctl - char node ioctl entry point
5791  */
5792 static long
5793 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
5794 {
5795         switch (cmd) {
5796         case MEGASAS_IOC_FIRMWARE:
5797                 return megasas_mgmt_ioctl_fw(file, arg);
5798 
5799         case MEGASAS_IOC_GET_AEN:
5800                 return megasas_mgmt_ioctl_aen(file, arg);
5801         }
5802 
5803         return -ENOTTY;
5804 }
5805 
5806 #ifdef CONFIG_COMPAT
5807 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
5808 {
5809         struct compat_megasas_iocpacket __user *cioc =
5810             (struct compat_megasas_iocpacket __user *)arg;
5811         struct megasas_iocpacket __user *ioc =
5812             compat_alloc_user_space(sizeof(struct megasas_iocpacket));
5813         int i;
5814         int error = 0;
5815         compat_uptr_t ptr;
5816 
5817         if (clear_user(ioc, sizeof(*ioc)))
5818                 return -EFAULT;
5819 
5820         if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
5821             copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
5822             copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
5823             copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
5824             copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
5825             copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
5826                 return -EFAULT;
5827 
5828         /*
5829          * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
5830          * sense_len is not null, so prepare the 64bit value under
5831          * the same condition.
5832          */
5833         if (ioc->sense_len) {
5834                 void __user **sense_ioc_ptr =
5835                         (void __user **)(ioc->frame.raw + ioc->sense_off);
5836                 compat_uptr_t *sense_cioc_ptr =
5837                         (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
5838                 if (get_user(ptr, sense_cioc_ptr) ||
5839                     put_user(compat_ptr(ptr), sense_ioc_ptr))
5840                         return -EFAULT;
5841         }
5842 
5843         for (i = 0; i < MAX_IOCTL_SGE; i++) {
5844                 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
5845                     put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
5846                     copy_in_user(&ioc->sgl[i].iov_len,
5847                                  &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
5848                         return -EFAULT;
5849         }
5850 
5851         error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
5852 
5853         if (copy_in_user(&cioc->frame.hdr.cmd_status,
5854                          &ioc->frame.hdr.cmd_status, sizeof(u8))) {
5855                 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
5856                 return -EFAULT;
5857         }
5858         return error;
5859 }
5860 
5861 static long
5862 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
5863                           unsigned long arg)
5864 {
5865         switch (cmd) {
5866         case MEGASAS_IOC_FIRMWARE32:
5867                 return megasas_mgmt_compat_ioctl_fw(file, arg);
5868         case MEGASAS_IOC_GET_AEN:
5869                 return megasas_mgmt_ioctl_aen(file, arg);
5870         }
5871 
5872         return -ENOTTY;
5873 }
5874 #endif
5875 
5876 /*
5877  * File operations structure for management interface
5878  */
5879 static const struct file_operations megasas_mgmt_fops = {
5880         .owner = THIS_MODULE,
5881         .open = megasas_mgmt_open,
5882         .fasync = megasas_mgmt_fasync,
5883         .unlocked_ioctl = megasas_mgmt_ioctl,
5884         .poll = megasas_mgmt_poll,
5885 #ifdef CONFIG_COMPAT
5886         .compat_ioctl = megasas_mgmt_compat_ioctl,
5887 #endif
5888         .llseek = noop_llseek,
5889 };
5890 
5891 /*
5892  * PCI hotplug support registration structure
5893  */
5894 static struct pci_driver megasas_pci_driver = {
5895 
5896         .name = "megaraid_sas",
5897         .id_table = megasas_pci_table,
5898         .probe = megasas_probe_one,
5899         .remove = megasas_detach_one,
5900         .suspend = megasas_suspend,
5901         .resume = megasas_resume,
5902         .shutdown = megasas_shutdown,
5903 };
5904 
5905 /*
5906  * Sysfs driver attributes
5907  */
5908 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
5909 {
5910         return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
5911                         MEGASAS_VERSION);
5912 }
5913 
5914 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
5915 
5916 static ssize_t
5917 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
5918 {
5919         return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
5920                         MEGASAS_RELDATE);
5921 }
5922 
5923 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
5924                    NULL);
5925 
5926 static ssize_t
5927 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
5928 {
5929         return sprintf(buf, "%u\n", support_poll_for_event);
5930 }
5931 
5932 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
5933                         megasas_sysfs_show_support_poll_for_event, NULL);
5934 
5935  static ssize_t
5936 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
5937 {
5938         return sprintf(buf, "%u\n", support_device_change);
5939 }
5940 
5941 static DRIVER_ATTR(support_device_change, S_IRUGO,
5942                         megasas_sysfs_show_support_device_change, NULL);
5943 
5944 static ssize_t
5945 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
5946 {
5947         return sprintf(buf, "%u\n", megasas_dbg_lvl);
5948 }
5949 
5950 static ssize_t
5951 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
5952 {
5953         int retval = count;
5954         if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
5955                 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
5956                 retval = -EINVAL;
5957         }
5958         return retval;
5959 }
5960 
5961 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
5962                 megasas_sysfs_set_dbg_lvl);
5963 
5964 static void
5965 megasas_aen_polling(struct work_struct *work)
5966 {
5967         struct megasas_aen_event *ev =
5968                 container_of(work, struct megasas_aen_event, hotplug_work.work);
5969         struct megasas_instance *instance = ev->instance;
5970         union megasas_evt_class_locale class_locale;
5971         struct  Scsi_Host *host;
5972         struct  scsi_device *sdev1;
5973         u16     pd_index = 0;
5974         u16     ld_index = 0;
5975         int     i, j, doscan = 0;
5976         u32 seq_num, wait_time = MEGASAS_RESET_WAIT_TIME;
5977         int error;
5978 
5979         if (!instance) {
5980                 printk(KERN_ERR "invalid instance!\n");
5981                 kfree(ev);
5982                 return;
5983         }
5984 
5985         /* Adjust event workqueue thread wait time for VF mode */
5986         if (instance->requestorId)
5987                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
5988 
5989         /* Don't run the event workqueue thread if OCR is running */
5990         for (i = 0; i < wait_time; i++) {
5991                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL)
5992                         break;
5993                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
5994                         printk(KERN_NOTICE "megasas: %s waiting for "
5995                                "controller reset to finish for scsi%d\n",
5996                                __func__, instance->host->host_no);
5997                 }
5998                 msleep(1000);
5999         }
6000 
6001         instance->ev = NULL;
6002         host = instance->host;
6003         if (instance->evt_detail) {
6004 
6005                 switch (le32_to_cpu(instance->evt_detail->code)) {
6006                 case MR_EVT_PD_INSERTED:
6007                         if (megasas_get_pd_list(instance) == 0) {
6008                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6009                                 for (j = 0;
6010                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6011                                 j++) {
6012 
6013                                 pd_index =
6014                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6015 
6016                                 sdev1 =
6017                                 scsi_device_lookup(host, i, j, 0);
6018 
6019                                 if (instance->pd_list[pd_index].driveState
6020                                                 == MR_PD_STATE_SYSTEM) {
6021                                                 if (!sdev1) {
6022                                                 scsi_add_device(host, i, j, 0);
6023                                                 }
6024 
6025                                         if (sdev1)
6026                                                 scsi_device_put(sdev1);
6027                                         }
6028                                 }
6029                         }
6030                         }
6031                         doscan = 0;
6032                         break;
6033 
6034                 case MR_EVT_PD_REMOVED:
6035                         if (megasas_get_pd_list(instance) == 0) {
6036                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6037                                 for (j = 0;
6038                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6039                                 j++) {
6040 
6041                                 pd_index =
6042                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6043 
6044                                 sdev1 =
6045                                 scsi_device_lookup(host, i, j, 0);
6046 
6047                                 if (instance->pd_list[pd_index].driveState
6048                                         == MR_PD_STATE_SYSTEM) {
6049                                         if (sdev1) {
6050                                                 scsi_device_put(sdev1);
6051                                         }
6052                                 } else {
6053                                         if (sdev1) {
6054                                                 scsi_remove_device(sdev1);
6055                                                 scsi_device_put(sdev1);
6056                                         }
6057                                 }
6058                                 }
6059                         }
6060                         }
6061                         doscan = 0;
6062                         break;
6063 
6064                 case MR_EVT_LD_OFFLINE:
6065                 case MR_EVT_CFG_CLEARED:
6066                 case MR_EVT_LD_DELETED:
6067                         if (!instance->requestorId ||
6068                             (instance->requestorId &&
6069                              megasas_get_ld_vf_affiliation(instance, 0))) {
6070                                 if (megasas_ld_list_query(instance,
6071                                                           MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6072                                         megasas_get_ld_list(instance);
6073                                 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6074                                         for (j = 0;
6075                                              j < MEGASAS_MAX_DEV_PER_CHANNEL;
6076                                              j++) {
6077 
6078                                                 ld_index =
6079                                                         (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6080 
6081                                                 sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6082 
6083                                                 if (instance->ld_ids[ld_index]
6084                                                     != 0xff) {
6085                                                         if (sdev1)
6086                                                                 scsi_device_put(sdev1);
6087                                                 } else {
6088                                                         if (sdev1) {
6089                                                                 scsi_remove_device(sdev1);
6090                                                                 scsi_device_put(sdev1);
6091                                                         }
6092                                                 }
6093                                         }
6094                                 }
6095                                 doscan = 0;
6096                         }
6097                         break;
6098                 case MR_EVT_LD_CREATED:
6099                         if (!instance->requestorId ||
6100                             (instance->requestorId &&
6101                              megasas_get_ld_vf_affiliation(instance, 0))) {
6102                                 if (megasas_ld_list_query(instance,
6103                                                           MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6104                                         megasas_get_ld_list(instance);
6105                                 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6106                                         for (j = 0;
6107                                              j < MEGASAS_MAX_DEV_PER_CHANNEL;
6108                                              j++) {
6109                                                 ld_index =
6110                                                         (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6111 
6112                                                 sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6113 
6114                                                 if (instance->ld_ids[ld_index]
6115                                                     != 0xff) {
6116                                                         if (!sdev1)
6117                                                                 scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6118                                                 }
6119                                                 if (sdev1)
6120                                                         scsi_device_put(sdev1);
6121                                         }
6122                                 }
6123                                 doscan = 0;
6124                         }
6125                         break;
6126                 case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
6127                 case MR_EVT_FOREIGN_CFG_IMPORTED:
6128                 case MR_EVT_LD_STATE_CHANGE:
6129                         doscan = 1;
6130                         break;
6131                 default:
6132                         doscan = 0;
6133                         break;
6134                 }
6135         } else {
6136                 printk(KERN_ERR "invalid evt_detail!\n");
6137                 kfree(ev);
6138                 return;
6139         }
6140 
6141         if (doscan) {
6142                 printk(KERN_INFO "megaraid_sas: scanning for scsi%d...\n",
6143                        instance->host->host_no);
6144                 if (megasas_get_pd_list(instance) == 0) {
6145                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6146                                 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
6147                                         pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
6148                                         sdev1 = scsi_device_lookup(host, i, j, 0);
6149                                         if (instance->pd_list[pd_index].driveState ==
6150                                             MR_PD_STATE_SYSTEM) {
6151                                                 if (!sdev1) {
6152                                                         scsi_add_device(host, i, j, 0);
6153                                                 }
6154                                                 if (sdev1)
6155                                                         scsi_device_put(sdev1);
6156                                         } else {
6157                                                 if (sdev1) {
6158                                                         scsi_remove_device(sdev1);
6159                                                         scsi_device_put(sdev1);
6160                                                 }
6161                                         }
6162                                 }
6163                         }
6164                 }
6165 
6166                 if (!instance->requestorId ||
6167                     (instance->requestorId &&
6168                      megasas_get_ld_vf_affiliation(instance, 0))) {
6169                         if (megasas_ld_list_query(instance,
6170                                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6171                                 megasas_get_ld_list(instance);
6172                         for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6173                                 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL;
6174                                      j++) {
6175                                         ld_index =
6176                                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6177 
6178                                         sdev1 = scsi_device_lookup(host,
6179                                                                    MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6180                                         if (instance->ld_ids[ld_index]
6181                                             != 0xff) {
6182                                                 if (!sdev1)
6183                                                         scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6184                                                 else
6185                                                         scsi_device_put(sdev1);
6186                                         } else {
6187                                                 if (sdev1) {
6188                                                         scsi_remove_device(sdev1);
6189                                                         scsi_device_put(sdev1);
6190                                                 }
6191                                         }
6192                                 }
6193                         }
6194                 }
6195         }
6196 
6197         if ( instance->aen_cmd != NULL ) {
6198                 kfree(ev);
6199                 return ;
6200         }
6201 
6202         seq_num = le32_to_cpu(instance->evt_detail->seq_num) + 1;
6203 
6204         /* Register AEN with FW for latest sequence number plus 1 */
6205         class_locale.members.reserved = 0;
6206         class_locale.members.locale = MR_EVT_LOCALE_ALL;
6207         class_locale.members.class = MR_EVT_CLASS_DEBUG;
6208         mutex_lock(&instance->aen_mutex);
6209         error = megasas_register_aen(instance, seq_num,
6210                                         class_locale.word);
6211         mutex_unlock(&instance->aen_mutex);
6212 
6213         if (error)
6214                 printk(KERN_ERR "register aen failed error %x\n", error);
6215 
6216         kfree(ev);
6217 }
6218 
6219 /**
6220  * megasas_init - Driver load entry point
6221  */
6222 static int __init megasas_init(void)
6223 {
6224         int rval;
6225 
6226         /*
6227          * Announce driver version and other information
6228          */
6229         printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
6230                MEGASAS_EXT_VERSION);
6231 
6232         spin_lock_init(&poll_aen_lock);
6233 
6234         support_poll_for_event = 2;
6235         support_device_change = 1;
6236 
6237         memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
6238 
6239         /*
6240          * Register character device node
6241          */
6242         rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
6243 
6244         if (rval < 0) {
6245                 printk(KERN_DEBUG "megasas: failed to open device node\n");
6246                 return rval;
6247         }
6248 
6249         megasas_mgmt_majorno = rval;
6250 
6251         /*
6252          * Register ourselves as PCI hotplug module
6253          */
6254         rval = pci_register_driver(&megasas_pci_driver);
6255 
6256         if (rval) {
6257                 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
6258                 goto err_pcidrv;
6259         }
6260 
6261         rval = driver_create_file(&megasas_pci_driver.driver,
6262                                   &driver_attr_version);
6263         if (rval)
6264                 goto err_dcf_attr_ver;
6265         rval = driver_create_file(&megasas_pci_driver.driver,
6266                                   &driver_attr_release_date);
6267         if (rval)
6268                 goto err_dcf_rel_date;
6269 
6270         rval = driver_create_file(&megasas_pci_driver.driver,
6271                                 &driver_attr_support_poll_for_event);
6272         if (rval)
6273                 goto err_dcf_support_poll_for_event;
6274 
6275         rval = driver_create_file(&megasas_pci_driver.driver,
6276                                   &driver_attr_dbg_lvl);
6277         if (rval)
6278                 goto err_dcf_dbg_lvl;
6279         rval = driver_create_file(&megasas_pci_driver.driver,
6280                                 &driver_attr_support_device_change);
6281         if (rval)
6282                 goto err_dcf_support_device_change;
6283 
6284         return rval;
6285 
6286 err_dcf_support_device_change:
6287         driver_remove_file(&megasas_pci_driver.driver,
6288                            &driver_attr_dbg_lvl);
6289 err_dcf_dbg_lvl:
6290         driver_remove_file(&megasas_pci_driver.driver,
6291                         &driver_attr_support_poll_for_event);
6292 
6293 err_dcf_support_poll_for_event:
6294         driver_remove_file(&megasas_pci_driver.driver,
6295                            &driver_attr_release_date);
6296 
6297 err_dcf_rel_date:
6298         driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
6299 err_dcf_attr_ver:
6300         pci_unregister_driver(&megasas_pci_driver);
6301 err_pcidrv:
6302         unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
6303         return rval;
6304 }
6305 
6306 /**
6307  * megasas_exit - Driver unload entry point
6308  */
6309 static void __exit megasas_exit(void)
6310 {
6311         driver_remove_file(&megasas_pci_driver.driver,
6312                            &driver_attr_dbg_lvl);
6313         driver_remove_file(&megasas_pci_driver.driver,
6314                         &driver_attr_support_poll_for_event);
6315         driver_remove_file(&megasas_pci_driver.driver,
6316                         &driver_attr_support_device_change);
6317         driver_remove_file(&megasas_pci_driver.driver,
6318                            &driver_attr_release_date);
6319         driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
6320 
6321         pci_unregister_driver(&megasas_pci_driver);
6322         unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
6323 }
6324 
6325 module_init(megasas_init);
6326 module_exit(megasas_exit);
6327 

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