drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2013  LSI Corporation
   5  *  Copyright (c) 2013-2016  Avago Technologies
   6  *  Copyright (c) 2016-2018  Broadcom Inc.
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version 2
  11  *  of the License, or (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  *  FILE: megaraid_sas_fusion.c
  22  *
  23  *  Authors: Broadcom Inc.
  24  *           Sumant Patro
  25  *           Adam Radford
  26  *           Kashyap Desai <kashyap.desai@broadcom.com>
  27  *           Sumit Saxena <sumit.saxena@broadcom.com>
  28  *
  29  *  Send feedback to: megaraidlinux.pdl@broadcom.com
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/pci.h>
  35 #include <linux/list.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/delay.h>
  41 #include <linux/uio.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/fs.h>
  44 #include <linux/compat.h>
  45 #include <linux/blkdev.h>
  46 #include <linux/mutex.h>
  47 #include <linux/poll.h>
  48 #include <linux/vmalloc.h>
  49 #include <linux/workqueue.h>
  50
  51 #include <scsi/scsi.h>
  52 #include <scsi/scsi_cmnd.h>
  53 #include <scsi/scsi_device.h>
  54 #include <scsi/scsi_host.h>
  55 #include <scsi/scsi_dbg.h>
  56 #include <linux/dmi.h>
  57
  58 #include "megaraid_sas_fusion.h"
  59 #include "megaraid_sas.h"
  60
  61
  62 extern void megasas_free_cmds(struct megasas_instance *instance);
  63 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  64                                            *instance);
  65 extern void
  66 megasas_complete_cmd(struct megasas_instance *instance,
  67                      struct megasas_cmd *cmd, u8 alt_status);
  68 int
  69 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  70               int seconds);
  71
  72 void
  73 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  74 int megasas_alloc_cmds(struct megasas_instance *instance);
  75 int
  76 megasas_clear_intr_fusion(struct megasas_instance *instance);
  77 int
  78 megasas_issue_polled(struct megasas_instance *instance,
  79                      struct megasas_cmd *cmd);
  80 void
  81 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  82
  83 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  84 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  85
  86 extern u32 megasas_dbg_lvl;
  87 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  88                                   int initial);
  89 void megasas_start_timer(struct megasas_instance *instance);
  90 extern struct megasas_mgmt_info megasas_mgmt_info;
  91 extern unsigned int resetwaittime;
  92 extern unsigned int dual_qdepth_disable;
  93 static void megasas_free_rdpq_fusion(struct megasas_instance *instance);
  94 static void megasas_free_reply_fusion(struct megasas_instance *instance);
  95 static inline
  96 void megasas_configure_queue_sizes(struct megasas_instance *instance);
  97 static void megasas_fusion_crash_dump(struct megasas_instance *instance);
  98 extern u32 megasas_readl(struct megasas_instance *instance,
  99                          const volatile void __iomem *addr);
 100
 101 /**
 102  * megasas_check_same_4gb_region -      check if allocation
 103  *                                      crosses same 4GB boundary or not
 104  * @instance -                          adapter's soft instance
 105  * start_addr -                 start address of DMA allocation
 106  * size -                               size of allocation in bytes
 107  * return -                             true : allocation does not cross same
 108  *                                      4GB boundary
 109  *                                      false: allocation crosses same
 110  *                                      4GB boundary
 111  */
 112 static inline bool megasas_check_same_4gb_region
 113         (struct megasas_instance *instance, dma_addr_t start_addr, size_t size)
 114 {
 115         dma_addr_t end_addr;
 116
 117         end_addr = start_addr + size;
 118
 119         if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) {
 120                 dev_err(&instance->pdev->dev,
 121                         "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n",
 122                         (unsigned long long)start_addr,
 123                         (unsigned long long)end_addr);
 124                 return false;
 125         }
 126
 127         return true;
 128 }
 129
 130 /**
 131  * megasas_enable_intr_fusion - Enables interrupts
 132  * @regs:                       MFI register set
 133  */
 134 void
 135 megasas_enable_intr_fusion(struct megasas_instance *instance)
 136 {
 137         struct megasas_register_set __iomem *regs;
 138         regs = instance->reg_set;
 139
 140         instance->mask_interrupts = 0;
 141         /* For Thunderbolt/Invader also clear intr on enable */
 142         writel(~0, &regs->outbound_intr_status);
 143         readl(&regs->outbound_intr_status);
 144
 145         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 146
 147         /* Dummy readl to force pci flush */
 148         readl(&regs->outbound_intr_mask);
 149 }
 150
 151 /**
 152  * megasas_disable_intr_fusion - Disables interrupt
 153  * @regs:                        MFI register set
 154  */
 155 void
 156 megasas_disable_intr_fusion(struct megasas_instance *instance)
 157 {
 158         u32 mask = 0xFFFFFFFF;
 159         u32 status;
 160         struct megasas_register_set __iomem *regs;
 161         regs = instance->reg_set;
 162         instance->mask_interrupts = 1;
 163
 164         writel(mask, &regs->outbound_intr_mask);
 165         /* Dummy readl to force pci flush */
 166         status = readl(&regs->outbound_intr_mask);
 167 }
 168
 169 int
 170 megasas_clear_intr_fusion(struct megasas_instance *instance)
 171 {
 172         u32 status;
 173         struct megasas_register_set __iomem *regs;
 174         regs = instance->reg_set;
 175         /*
 176          * Check if it is our interrupt
 177          */
 178         status = megasas_readl(instance,
 179                                &regs->outbound_intr_status);
 180
 181         if (status & 1) {
 182                 writel(status, &regs->outbound_intr_status);
 183                 readl(&regs->outbound_intr_status);
 184                 return 1;
 185         }
 186         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 187                 return 0;
 188
 189         return 1;
 190 }
 191
 192 /**
 193  * megasas_get_cmd_fusion -     Get a command from the free pool
 194  * @instance:           Adapter soft state
 195  *
 196  * Returns a blk_tag indexed mpt frame
 197  */
 198 inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 199                                                   *instance, u32 blk_tag)
 200 {
 201         struct fusion_context *fusion;
 202
 203         fusion = instance->ctrl_context;
 204         return fusion->cmd_list[blk_tag];
 205 }
 206
 207 /**
 208  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 209  * @instance:           Adapter soft state
 210  * @cmd:                Command packet to be returned to free command pool
 211  */
 212 inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
 213         struct megasas_cmd_fusion *cmd)
 214 {
 215         cmd->scmd = NULL;
 216         memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
 217         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 218         cmd->cmd_completed = false;
 219 }
 220
 221 /**
 222  * megasas_fire_cmd_fusion -    Sends command to the FW
 223  * @instance:                   Adapter soft state
 224  * @req_desc:                   64bit Request descriptor
 225  *
 226  * Perform PCI Write.
 227  */
 228
 229 static void
 230 megasas_fire_cmd_fusion(struct megasas_instance *instance,
 231                 union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
 232 {
 233 #if defined(writeq) && defined(CONFIG_64BIT)
 234         u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
 235                 le32_to_cpu(req_desc->u.low));
 236
 237         writeq(req_data, &instance->reg_set->inbound_low_queue_port);
 238 #else
 239         unsigned long flags;
 240         spin_lock_irqsave(&instance->hba_lock, flags);
 241         writel(le32_to_cpu(req_desc->u.low),
 242                 &instance->reg_set->inbound_low_queue_port);
 243         writel(le32_to_cpu(req_desc->u.high),
 244                 &instance->reg_set->inbound_high_queue_port);
 245         mmiowb();
 246         spin_unlock_irqrestore(&instance->hba_lock, flags);
 247 #endif
 248 }
 249
 250 /**
 251  * megasas_fusion_update_can_queue -    Do all Adapter Queue depth related calculations here
 252  * @instance:                                                   Adapter soft state
 253  * fw_boot_context:                                             Whether this function called during probe or after OCR
 254  *
 255  * This function is only for fusion controllers.
 256  * Update host can queue, if firmware downgrade max supported firmware commands.
 257  * Firmware upgrade case will be skiped because underlying firmware has
 258  * more resource than exposed to the OS.
 259  *
 260  */
 261 static void
 262 megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context)
 263 {
 264         u16 cur_max_fw_cmds = 0;
 265         u16 ldio_threshold = 0;
 266         struct megasas_register_set __iomem *reg_set;
 267
 268         reg_set = instance->reg_set;
 269
 270         /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */
 271         if (instance->adapter_type < VENTURA_SERIES)
 272                 cur_max_fw_cmds =
 273                 megasas_readl(instance,
 274                               &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF;
 275
 276         if (dual_qdepth_disable || !cur_max_fw_cmds)
 277                 cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 278         else
 279                 ldio_threshold =
 280                         (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 281
 282         dev_info(&instance->pdev->dev,
 283                  "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
 284                  cur_max_fw_cmds, ldio_threshold);
 285
 286         if (fw_boot_context == OCR_CONTEXT) {
 287                 cur_max_fw_cmds = cur_max_fw_cmds - 1;
 288                 if (cur_max_fw_cmds < instance->max_fw_cmds) {
 289                         instance->cur_can_queue =
 290                                 cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS +
 291                                                 MEGASAS_FUSION_IOCTL_CMDS);
 292                         instance->host->can_queue = instance->cur_can_queue;
 293                         instance->ldio_threshold = ldio_threshold;
 294                 }
 295         } else {
 296                 instance->max_fw_cmds = cur_max_fw_cmds;
 297                 instance->ldio_threshold = ldio_threshold;
 298
 299                 if (reset_devices)
 300                         instance->max_fw_cmds = min(instance->max_fw_cmds,
 301                                                 (u16)MEGASAS_KDUMP_QUEUE_DEPTH);
 302                 /*
 303                 * Reduce the max supported cmds by 1. This is to ensure that the
 304                 * reply_q_sz (1 more than the max cmd that driver may send)
 305                 * does not exceed max cmds that the FW can support
 306                 */
 307                 instance->max_fw_cmds = instance->max_fw_cmds-1;
 308         }
 309 }
 310 /**
 311  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 312  * @instance:           Adapter soft state
 313  */
 314 void
 315 megasas_free_cmds_fusion(struct megasas_instance *instance)
 316 {
 317         int i;
 318         struct fusion_context *fusion = instance->ctrl_context;
 319         struct megasas_cmd_fusion *cmd;
 320
 321         if (fusion->sense)
 322                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 323                               fusion->sense_phys_addr);
 324
 325         /* SG */
 326         if (fusion->cmd_list) {
 327                 for (i = 0; i < instance->max_mpt_cmds; i++) {
 328                         cmd = fusion->cmd_list[i];
 329                         if (cmd) {
 330                                 if (cmd->sg_frame)
 331                                         dma_pool_free(fusion->sg_dma_pool,
 332                                                       cmd->sg_frame,
 333                                                       cmd->sg_frame_phys_addr);
 334                         }
 335                         kfree(cmd);
 336                 }
 337                 kfree(fusion->cmd_list);
 338         }
 339
 340         if (fusion->sg_dma_pool) {
 341                 dma_pool_destroy(fusion->sg_dma_pool);
 342                 fusion->sg_dma_pool = NULL;
 343         }
 344         if (fusion->sense_dma_pool) {
 345                 dma_pool_destroy(fusion->sense_dma_pool);
 346                 fusion->sense_dma_pool = NULL;
 347         }
 348
 349
 350         /* Reply Frame, Desc*/
 351         if (instance->is_rdpq)
 352                 megasas_free_rdpq_fusion(instance);
 353         else
 354                 megasas_free_reply_fusion(instance);
 355
 356         /* Request Frame, Desc*/
 357         if (fusion->req_frames_desc)
 358                 dma_free_coherent(&instance->pdev->dev,
 359                         fusion->request_alloc_sz, fusion->req_frames_desc,
 360                         fusion->req_frames_desc_phys);
 361         if (fusion->io_request_frames)
 362                 dma_pool_free(fusion->io_request_frames_pool,
 363                         fusion->io_request_frames,
 364                         fusion->io_request_frames_phys);
 365         if (fusion->io_request_frames_pool) {
 366                 dma_pool_destroy(fusion->io_request_frames_pool);
 367                 fusion->io_request_frames_pool = NULL;
 368         }
 369 }
 370
 371 /**
 372  * megasas_create_sg_sense_fusion -     Creates DMA pool for cmd frames
 373  * @instance:                   Adapter soft state
 374  *
 375  */
 376 static int megasas_create_sg_sense_fusion(struct megasas_instance *instance)
 377 {
 378         int i;
 379         u16 max_cmd;
 380         struct fusion_context *fusion;
 381         struct megasas_cmd_fusion *cmd;
 382         int sense_sz;
 383         u32 offset;
 384
 385         fusion = instance->ctrl_context;
 386         max_cmd = instance->max_fw_cmds;
 387         sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE;
 388
 389         fusion->sg_dma_pool =
 390                         dma_pool_create("mr_sg", &instance->pdev->dev,
 391                                 instance->max_chain_frame_sz,
 392                                 MR_DEFAULT_NVME_PAGE_SIZE, 0);
 393         /* SCSI_SENSE_BUFFERSIZE  = 96 bytes */
 394         fusion->sense_dma_pool =
 395                         dma_pool_create("mr_sense", &instance->pdev->dev,
 396                                 sense_sz, 64, 0);
 397
 398         if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) {
 399                 dev_err(&instance->pdev->dev,
 400                         "Failed from %s %d\n",  __func__, __LINE__);
 401                 return -ENOMEM;
 402         }
 403
 404         fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 405                                        GFP_KERNEL, &fusion->sense_phys_addr);
 406         if (!fusion->sense) {
 407                 dev_err(&instance->pdev->dev,
 408                         "failed from %s %d\n",  __func__, __LINE__);
 409                 return -ENOMEM;
 410         }
 411
 412         /* sense buffer, request frame and reply desc pool requires to be in
 413          * same 4 gb region. Below function will check this.
 414          * In case of failure, new pci pool will be created with updated
 415          * alignment.
 416          * Older allocation and pool will be destroyed.
 417          * Alignment will be used such a way that next allocation if success,
 418          * will always meet same 4gb region requirement.
 419          * Actual requirement is not alignment, but we need start and end of
 420          * DMA address must have same upper 32 bit address.
 421          */
 422
 423         if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr,
 424                                            sense_sz)) {
 425                 dma_pool_free(fusion->sense_dma_pool, fusion->sense,
 426                               fusion->sense_phys_addr);
 427                 fusion->sense = NULL;
 428                 dma_pool_destroy(fusion->sense_dma_pool);
 429
 430                 fusion->sense_dma_pool =
 431                         dma_pool_create("mr_sense_align", &instance->pdev->dev,
 432                                         sense_sz, roundup_pow_of_two(sense_sz),
 433                                         0);
 434                 if (!fusion->sense_dma_pool) {
 435                         dev_err(&instance->pdev->dev,
 436                                 "Failed from %s %d\n",  __func__, __LINE__);
 437                         return -ENOMEM;
 438                 }
 439                 fusion->sense = dma_pool_alloc(fusion->sense_dma_pool,
 440                                                GFP_KERNEL,
 441                                                &fusion->sense_phys_addr);
 442                 if (!fusion->sense) {
 443                         dev_err(&instance->pdev->dev,
 444                                 "failed from %s %d\n",  __func__, __LINE__);
 445                         return -ENOMEM;
 446                 }
 447         }
 448
 449         /*
 450          * Allocate and attach a frame to each of the commands in cmd_list
 451          */
 452         for (i = 0; i < max_cmd; i++) {
 453                 cmd = fusion->cmd_list[i];
 454                 cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool,
 455                                         GFP_KERNEL, &cmd->sg_frame_phys_addr);
 456
 457                 offset = SCSI_SENSE_BUFFERSIZE * i;
 458                 cmd->sense = (u8 *)fusion->sense + offset;
 459                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 460
 461                 if (!cmd->sg_frame) {
 462                         dev_err(&instance->pdev->dev,
 463                                 "Failed from %s %d\n",  __func__, __LINE__);
 464                         return -ENOMEM;
 465                 }
 466         }
 467
 468         /* create sense buffer for the raid 1/10 fp */
 469         for (i = max_cmd; i < instance->max_mpt_cmds; i++) {
 470                 cmd = fusion->cmd_list[i];
 471                 offset = SCSI_SENSE_BUFFERSIZE * i;
 472                 cmd->sense = (u8 *)fusion->sense + offset;
 473                 cmd->sense_phys_addr = fusion->sense_phys_addr + offset;
 474
 475         }
 476
 477         return 0;
 478 }
 479
 480 int
 481 megasas_alloc_cmdlist_fusion(struct megasas_instance *instance)
 482 {
 483         u32 max_mpt_cmd, i, j;
 484         struct fusion_context *fusion;
 485
 486         fusion = instance->ctrl_context;
 487
 488         max_mpt_cmd = instance->max_mpt_cmds;
 489
 490         /*
 491          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 492          * Allocate the dynamic array first and then allocate individual
 493          * commands.
 494          */
 495         fusion->cmd_list =
 496                 kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *),
 497                         GFP_KERNEL);
 498         if (!fusion->cmd_list) {
 499                 dev_err(&instance->pdev->dev,
 500                         "Failed from %s %d\n",  __func__, __LINE__);
 501                 return -ENOMEM;
 502         }
 503
 504         for (i = 0; i < max_mpt_cmd; i++) {
 505                 fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion),
 506                                               GFP_KERNEL);
 507                 if (!fusion->cmd_list[i]) {
 508                         for (j = 0; j < i; j++)
 509                                 kfree(fusion->cmd_list[j]);
 510                         kfree(fusion->cmd_list);
 511                         dev_err(&instance->pdev->dev,
 512                                 "Failed from %s %d\n",  __func__, __LINE__);
 513                         return -ENOMEM;
 514                 }
 515         }
 516
 517         return 0;
 518 }
 519 int
 520 megasas_alloc_request_fusion(struct megasas_instance *instance)
 521 {
 522         struct fusion_context *fusion;
 523
 524         fusion = instance->ctrl_context;
 525
 526 retry_alloc:
 527         fusion->io_request_frames_pool =
 528                         dma_pool_create("mr_ioreq", &instance->pdev->dev,
 529                                 fusion->io_frames_alloc_sz, 16, 0);
 530
 531         if (!fusion->io_request_frames_pool) {
 532                 dev_err(&instance->pdev->dev,
 533                         "Failed from %s %d\n",  __func__, __LINE__);
 534                 return -ENOMEM;
 535         }
 536
 537         fusion->io_request_frames =
 538                         dma_pool_alloc(fusion->io_request_frames_pool,
 539                                 GFP_KERNEL, &fusion->io_request_frames_phys);
 540         if (!fusion->io_request_frames) {
 541                 if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) {
 542                         instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT;
 543                         dma_pool_destroy(fusion->io_request_frames_pool);
 544                         megasas_configure_queue_sizes(instance);
 545                         goto retry_alloc;
 546                 } else {
 547                         dev_err(&instance->pdev->dev,
 548                                 "Failed from %s %d\n",  __func__, __LINE__);
 549                         return -ENOMEM;
 550                 }
 551         }
 552
 553         if (!megasas_check_same_4gb_region(instance,
 554                                            fusion->io_request_frames_phys,
 555                                            fusion->io_frames_alloc_sz)) {
 556                 dma_pool_free(fusion->io_request_frames_pool,
 557                               fusion->io_request_frames,
 558                               fusion->io_request_frames_phys);
 559                 fusion->io_request_frames = NULL;
 560                 dma_pool_destroy(fusion->io_request_frames_pool);
 561
 562                 fusion->io_request_frames_pool =
 563                         dma_pool_create("mr_ioreq_align",
 564                                         &instance->pdev->dev,
 565                                         fusion->io_frames_alloc_sz,
 566                                         roundup_pow_of_two(fusion->io_frames_alloc_sz),
 567                                         0);
 568
 569                 if (!fusion->io_request_frames_pool) {
 570                         dev_err(&instance->pdev->dev,
 571                                 "Failed from %s %d\n",  __func__, __LINE__);
 572                         return -ENOMEM;
 573                 }
 574
 575                 fusion->io_request_frames =
 576                         dma_pool_alloc(fusion->io_request_frames_pool,
 577                                        GFP_KERNEL,
 578                                        &fusion->io_request_frames_phys);
 579
 580                 if (!fusion->io_request_frames) {
 581                         dev_err(&instance->pdev->dev,
 582                                 "Failed from %s %d\n",  __func__, __LINE__);
 583                         return -ENOMEM;
 584                 }
 585         }
 586
 587         fusion->req_frames_desc =
 588                 dma_alloc_coherent(&instance->pdev->dev,
 589                                    fusion->request_alloc_sz,
 590                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 591         if (!fusion->req_frames_desc) {
 592                 dev_err(&instance->pdev->dev,
 593                         "Failed from %s %d\n",  __func__, __LINE__);
 594                 return -ENOMEM;
 595         }
 596
 597         return 0;
 598 }
 599
 600 int
 601 megasas_alloc_reply_fusion(struct megasas_instance *instance)
 602 {
 603         int i, count;
 604         struct fusion_context *fusion;
 605         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 606         fusion = instance->ctrl_context;
 607
 608         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 609         fusion->reply_frames_desc_pool =
 610                         dma_pool_create("mr_reply", &instance->pdev->dev,
 611                                 fusion->reply_alloc_sz * count, 16, 0);
 612
 613         if (!fusion->reply_frames_desc_pool) {
 614                 dev_err(&instance->pdev->dev,
 615                         "Failed from %s %d\n",  __func__, __LINE__);
 616                 return -ENOMEM;
 617         }
 618
 619         fusion->reply_frames_desc[0] =
 620                 dma_pool_alloc(fusion->reply_frames_desc_pool,
 621                         GFP_KERNEL, &fusion->reply_frames_desc_phys[0]);
 622         if (!fusion->reply_frames_desc[0]) {
 623                 dev_err(&instance->pdev->dev,
 624                         "Failed from %s %d\n",  __func__, __LINE__);
 625                 return -ENOMEM;
 626         }
 627
 628         if (!megasas_check_same_4gb_region(instance,
 629                                            fusion->reply_frames_desc_phys[0],
 630                                            (fusion->reply_alloc_sz * count))) {
 631                 dma_pool_free(fusion->reply_frames_desc_pool,
 632                               fusion->reply_frames_desc[0],
 633                               fusion->reply_frames_desc_phys[0]);
 634                 fusion->reply_frames_desc[0] = NULL;
 635                 dma_pool_destroy(fusion->reply_frames_desc_pool);
 636
 637                 fusion->reply_frames_desc_pool =
 638                         dma_pool_create("mr_reply_align",
 639                                         &instance->pdev->dev,
 640                                         fusion->reply_alloc_sz * count,
 641                                         roundup_pow_of_two(fusion->reply_alloc_sz * count),
 642                                         0);
 643
 644                 if (!fusion->reply_frames_desc_pool) {
 645                         dev_err(&instance->pdev->dev,
 646                                 "Failed from %s %d\n",  __func__, __LINE__);
 647                         return -ENOMEM;
 648                 }
 649
 650                 fusion->reply_frames_desc[0] =
 651                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 652                                        GFP_KERNEL,
 653                                        &fusion->reply_frames_desc_phys[0]);
 654
 655                 if (!fusion->reply_frames_desc[0]) {
 656                         dev_err(&instance->pdev->dev,
 657                                 "Failed from %s %d\n",  __func__, __LINE__);
 658                         return -ENOMEM;
 659                 }
 660         }
 661
 662         reply_desc = fusion->reply_frames_desc[0];
 663         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 664                 reply_desc->Words = cpu_to_le64(ULLONG_MAX);
 665
 666         /* This is not a rdpq mode, but driver still populate
 667          * reply_frame_desc array to use same msix index in ISR path.
 668          */
 669         for (i = 0; i < (count - 1); i++)
 670                 fusion->reply_frames_desc[i + 1] =
 671                         fusion->reply_frames_desc[i] +
 672                         (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION);
 673
 674         return 0;
 675 }
 676
 677 int
 678 megasas_alloc_rdpq_fusion(struct megasas_instance *instance)
 679 {
 680         int i, j, k, msix_count;
 681         struct fusion_context *fusion;
 682         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 683         union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT];
 684         dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT];
 685         u8 dma_alloc_count, abs_index;
 686         u32 chunk_size, array_size, offset;
 687
 688         fusion = instance->ctrl_context;
 689         chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK;
 690         array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) *
 691                      MAX_MSIX_QUEUES_FUSION;
 692
 693         fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev,
 694                                                array_size, &fusion->rdpq_phys,
 695                                                GFP_KERNEL);
 696         if (!fusion->rdpq_virt) {
 697                 dev_err(&instance->pdev->dev,
 698                         "Failed from %s %d\n",  __func__, __LINE__);
 699                 return -ENOMEM;
 700         }
 701
 702         msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 703
 704         fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq",
 705                                                          &instance->pdev->dev,
 706                                                          chunk_size, 16, 0);
 707         fusion->reply_frames_desc_pool_align =
 708                                 dma_pool_create("mr_rdpq_align",
 709                                                 &instance->pdev->dev,
 710                                                 chunk_size,
 711                                                 roundup_pow_of_two(chunk_size),
 712                                                 0);
 713
 714         if (!fusion->reply_frames_desc_pool ||
 715             !fusion->reply_frames_desc_pool_align) {
 716                 dev_err(&instance->pdev->dev,
 717                         "Failed from %s %d\n",  __func__, __LINE__);
 718                 return -ENOMEM;
 719         }
 720
 721 /*
 722  * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and
 723  * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be
 724  * within 4GB boundary and also reply queues in a set must have same
 725  * upper 32-bits in their memory address. so here driver is allocating the
 726  * DMA'able memory for reply queues according. Driver uses limitation of
 727  * VENTURA_SERIES to manage INVADER_SERIES as well.
 728  */
 729         dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK);
 730
 731         for (i = 0; i < dma_alloc_count; i++) {
 732                 rdpq_chunk_virt[i] =
 733                         dma_pool_alloc(fusion->reply_frames_desc_pool,
 734                                        GFP_KERNEL, &rdpq_chunk_phys[i]);
 735                 if (!rdpq_chunk_virt[i]) {
 736                         dev_err(&instance->pdev->dev,
 737                                 "Failed from %s %d\n",  __func__, __LINE__);
 738                         return -ENOMEM;
 739                 }
 740                 /* reply desc pool requires to be in same 4 gb region.
 741                  * Below function will check this.
 742                  * In case of failure, new pci pool will be created with updated
 743                  * alignment.
 744                  * For RDPQ buffers, driver always allocate two separate pci pool.
 745                  * Alignment will be used such a way that next allocation if
 746                  * success, will always meet same 4gb region requirement.
 747                  * rdpq_tracker keep track of each buffer's physical,
 748                  * virtual address and pci pool descriptor. It will help driver
 749                  * while freeing the resources.
 750                  *
 751                  */
 752                 if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i],
 753                                                    chunk_size)) {
 754                         dma_pool_free(fusion->reply_frames_desc_pool,
 755                                       rdpq_chunk_virt[i],
 756                                       rdpq_chunk_phys[i]);
 757
 758                         rdpq_chunk_virt[i] =
 759                                 dma_pool_alloc(fusion->reply_frames_desc_pool_align,
 760                                                GFP_KERNEL, &rdpq_chunk_phys[i]);
 761                         if (!rdpq_chunk_virt[i]) {
 762                                 dev_err(&instance->pdev->dev,
 763                                         "Failed from %s %d\n",
 764                                         __func__, __LINE__);
 765                                 return -ENOMEM;
 766                         }
 767                         fusion->rdpq_tracker[i].dma_pool_ptr =
 768                                         fusion->reply_frames_desc_pool_align;
 769                 } else {
 770                         fusion->rdpq_tracker[i].dma_pool_ptr =
 771                                         fusion->reply_frames_desc_pool;
 772                 }
 773
 774                 fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i];
 775                 fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i];
 776         }
 777
 778         for (k = 0; k < dma_alloc_count; k++) {
 779                 for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) {
 780                         abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i;
 781
 782                         if (abs_index == msix_count)
 783                                 break;
 784                         offset = fusion->reply_alloc_sz * i;
 785                         fusion->rdpq_virt[abs_index].RDPQBaseAddress =
 786                                         cpu_to_le64(rdpq_chunk_phys[k] + offset);
 787                         fusion->reply_frames_desc_phys[abs_index] =
 788                                         rdpq_chunk_phys[k] + offset;
 789                         fusion->reply_frames_desc[abs_index] =
 790                                         (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset);
 791
 792                         reply_desc = fusion->reply_frames_desc[abs_index];
 793                         for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++)
 794                                 reply_desc->Words = ULLONG_MAX;
 795                 }
 796         }
 797
 798         return 0;
 799 }
 800
 801 static void
 802 megasas_free_rdpq_fusion(struct megasas_instance *instance) {
 803
 804         int i;
 805         struct fusion_context *fusion;
 806
 807         fusion = instance->ctrl_context;
 808
 809         for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) {
 810                 if (fusion->rdpq_tracker[i].pool_entry_virt)
 811                         dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr,
 812                                       fusion->rdpq_tracker[i].pool_entry_virt,
 813                                       fusion->rdpq_tracker[i].pool_entry_phys);
 814
 815         }
 816
 817         dma_pool_destroy(fusion->reply_frames_desc_pool);
 818         dma_pool_destroy(fusion->reply_frames_desc_pool_align);
 819
 820         if (fusion->rdpq_virt)
 821                 dma_free_coherent(&instance->pdev->dev,
 822                         sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION,
 823                         fusion->rdpq_virt, fusion->rdpq_phys);
 824 }
 825
 826 static void
 827 megasas_free_reply_fusion(struct megasas_instance *instance) {
 828
 829         struct fusion_context *fusion;
 830
 831         fusion = instance->ctrl_context;
 832
 833         if (fusion->reply_frames_desc[0])
 834                 dma_pool_free(fusion->reply_frames_desc_pool,
 835                         fusion->reply_frames_desc[0],
 836                         fusion->reply_frames_desc_phys[0]);
 837
 838         dma_pool_destroy(fusion->reply_frames_desc_pool);
 839
 840 }
 841
 842
 843 /**
 844  * megasas_alloc_cmds_fusion -  Allocates the command packets
 845  * @instance:           Adapter soft state
 846  *
 847  *
 848  * Each frame has a 32-bit field called context. This context is used to get
 849  * back the megasas_cmd_fusion from the frame when a frame gets completed
 850  * In this driver, the 32 bit values are the indices into an array cmd_list.
 851  * This array is used only to look up the megasas_cmd_fusion given the context.
 852  * The free commands themselves are maintained in a linked list called cmd_pool.
 853  *
 854  * cmds are formed in the io_request and sg_frame members of the
 855  * megasas_cmd_fusion. The context field is used to get a request descriptor
 856  * and is used as SMID of the cmd.
 857  * SMID value range is from 1 to max_fw_cmds.
 858  */
 859 int
 860 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 861 {
 862         int i;
 863         struct fusion_context *fusion;
 864         struct megasas_cmd_fusion *cmd;
 865         u32 offset;
 866         dma_addr_t io_req_base_phys;
 867         u8 *io_req_base;
 868
 869
 870         fusion = instance->ctrl_context;
 871
 872         if (megasas_alloc_request_fusion(instance))
 873                 goto fail_exit;
 874
 875         if (instance->is_rdpq) {
 876                 if (megasas_alloc_rdpq_fusion(instance))
 877                         goto fail_exit;
 878         } else
 879                 if (megasas_alloc_reply_fusion(instance))
 880                         goto fail_exit;
 881
 882         if (megasas_alloc_cmdlist_fusion(instance))
 883                 goto fail_exit;
 884
 885         dev_info(&instance->pdev->dev, "Configured max firmware commands: %d\n",
 886                  instance->max_fw_cmds);
 887
 888         /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */
 889         io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 890         io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 891
 892         /*
 893          * Add all the commands to command pool (fusion->cmd_pool)
 894          */
 895
 896         /* SMID 0 is reserved. Set SMID/index from 1 */
 897         for (i = 0; i < instance->max_mpt_cmds; i++) {
 898                 cmd = fusion->cmd_list[i];
 899                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 900                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 901                 cmd->index = i + 1;
 902                 cmd->scmd = NULL;
 903                 cmd->sync_cmd_idx =
 904                 (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ?
 905                                 (i - instance->max_scsi_cmds) :
 906                                 (u32)ULONG_MAX; /* Set to Invalid */
 907                 cmd->instance = instance;
 908                 cmd->io_request =
 909                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 910                   (io_req_base + offset);
 911                 memset(cmd->io_request, 0,
 912                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 913                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 914                 cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
 915         }
 916
 917         if (megasas_create_sg_sense_fusion(instance))
 918                 goto fail_exit;
 919
 920         return 0;
 921
 922 fail_exit:
 923         megasas_free_cmds_fusion(instance);
 924         return -ENOMEM;
 925 }
 926
 927 /**
 928  * wait_and_poll -      Issues a polling command
 929  * @instance:                   Adapter soft state
 930  * @cmd:                        Command packet to be issued
 931  *
 932  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 933  */
 934 int
 935 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 936         int seconds)
 937 {
 938         int i;
 939         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 940         struct fusion_context *fusion;
 941
 942         u32 msecs = seconds * 1000;
 943
 944         fusion = instance->ctrl_context;
 945         /*
 946          * Wait for cmd_status to change
 947          */
 948         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 949                 rmb();
 950                 msleep(20);
 951         }
 952
 953         if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS)
 954                 return DCMD_TIMEOUT;
 955         else if (frame_hdr->cmd_status == MFI_STAT_OK)
 956                 return DCMD_SUCCESS;
 957         else
 958                 return DCMD_FAILED;
 959 }
 960
 961 /**
 962  * megasas_ioc_init_fusion -    Initializes the FW
 963  * @instance:           Adapter soft state
 964  *
 965  * Issues the IOC Init cmd
 966  */
 967 int
 968 megasas_ioc_init_fusion(struct megasas_instance *instance)
 969 {
 970         struct megasas_init_frame *init_frame;
 971         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL;
 972         dma_addr_t      ioc_init_handle;
 973         struct megasas_cmd *cmd;
 974         u8 ret, cur_rdpq_mode;
 975         struct fusion_context *fusion;
 976         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
 977         int i;
 978         struct megasas_header *frame_hdr;
 979         const char *sys_info;
 980         MFI_CAPABILITIES *drv_ops;
 981         u32 scratch_pad_1;
 982         ktime_t time;
 983         bool cur_fw_64bit_dma_capable;
 984
 985         fusion = instance->ctrl_context;
 986
 987         ioc_init_handle = fusion->ioc_init_request_phys;
 988         IOCInitMessage = fusion->ioc_init_request;
 989
 990         cmd = fusion->ioc_init_cmd;
 991
 992         scratch_pad_1 = megasas_readl
 993                 (instance, &instance->reg_set->outbound_scratch_pad_1);
 994
 995         cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0;
 996
 997         if (instance->adapter_type == INVADER_SERIES) {
 998                 cur_fw_64bit_dma_capable =
 999                         (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false;
1000
1001                 if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) {
1002                         dev_err(&instance->pdev->dev, "Driver was operating on 64bit "
1003                                 "DMA mask, but upcoming FW does not support 64bit DMA mask\n");
1004                         megaraid_sas_kill_hba(instance);
1005                         ret = 1;
1006                         goto fail_fw_init;
1007                 }
1008         }
1009
1010         if (instance->is_rdpq && !cur_rdpq_mode) {
1011                 dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*"
1012                         " from RDPQ mode to non RDPQ mode\n");
1013                 ret = 1;
1014                 goto fail_fw_init;
1015         }
1016
1017         instance->fw_sync_cache_support = (scratch_pad_1 &
1018                 MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0;
1019         dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n",
1020                  instance->fw_sync_cache_support ? "Yes" : "No");
1021
1022         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
1023
1024         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
1025         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
1026         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
1027         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
1028         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
1029
1030         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
1031         IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ?
1032                         cpu_to_le64(fusion->rdpq_phys) :
1033                         cpu_to_le64(fusion->reply_frames_desc_phys[0]);
1034         IOCInitMessage->MsgFlags = instance->is_rdpq ?
1035                         MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0;
1036         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
1037         IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr));
1038         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
1039         IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
1040
1041         time = ktime_get_real();
1042         /* Convert to milliseconds as per FW requirement */
1043         IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
1044
1045         init_frame = (struct megasas_init_frame *)cmd->frame;
1046         memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
1047
1048         frame_hdr = &cmd->frame->hdr;
1049         frame_hdr->cmd_status = 0xFF;
1050         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
1051
1052         init_frame->cmd = MFI_CMD_INIT;
1053         init_frame->cmd_status = 0xFF;
1054
1055         drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations);
1056
1057         /* driver support Extended MSIX */
1058         if (instance->adapter_type >= INVADER_SERIES)
1059                 drv_ops->mfi_capabilities.support_additional_msix = 1;
1060         /* driver supports HA / Remote LUN over Fast Path interface */
1061         drv_ops->mfi_capabilities.support_fp_remote_lun = 1;
1062
1063         drv_ops->mfi_capabilities.support_max_255lds = 1;
1064         drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1;
1065         drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1;
1066
1067         if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN)
1068                 drv_ops->mfi_capabilities.support_ext_io_size = 1;
1069
1070         drv_ops->mfi_capabilities.support_fp_rlbypass = 1;
1071         if (!dual_qdepth_disable)
1072                 drv_ops->mfi_capabilities.support_ext_queue_depth = 1;
1073
1074         drv_ops->mfi_capabilities.support_qd_throttling = 1;
1075         drv_ops->mfi_capabilities.support_pd_map_target_id = 1;
1076         drv_ops->mfi_capabilities.support_nvme_passthru = 1;
1077
1078         if (instance->consistent_mask_64bit)
1079                 drv_ops->mfi_capabilities.support_64bit_mode = 1;
1080
1081         /* Convert capability to LE32 */
1082         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
1083
1084         sys_info = dmi_get_system_info(DMI_PRODUCT_UUID);
1085         if (instance->system_info_buf && sys_info) {
1086                 memcpy(instance->system_info_buf->systemId, sys_info,
1087                         strlen(sys_info) > 64 ? 64 : strlen(sys_info));
1088                 instance->system_info_buf->systemIdLength =
1089                         strlen(sys_info) > 64 ? 64 : strlen(sys_info);
1090                 init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h));
1091                 init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h));
1092         }
1093
1094         init_frame->queue_info_new_phys_addr_hi =
1095                 cpu_to_le32(upper_32_bits(ioc_init_handle));
1096         init_frame->queue_info_new_phys_addr_lo =
1097                 cpu_to_le32(lower_32_bits(ioc_init_handle));
1098         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
1099
1100         req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
1101         req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
1102         req_desc.MFAIo.RequestFlags =
1103                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
1104                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1105
1106         /*
1107          * disable the intr before firing the init frame
1108          */
1109         instance->instancet->disable_intr(instance);
1110
1111         for (i = 0; i < (10 * 1000); i += 20) {
1112                 if (megasas_readl(instance, &instance->reg_set->doorbell) & 1)
1113                         msleep(20);
1114                 else
1115                         break;
1116         }
1117
1118         megasas_fire_cmd_fusion(instance, &req_desc);
1119
1120         wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS);
1121
1122         frame_hdr = &cmd->frame->hdr;
1123         if (frame_hdr->cmd_status != 0) {
1124                 ret = 1;
1125                 goto fail_fw_init;
1126         }
1127
1128         return 0;
1129
1130 fail_fw_init:
1131         dev_err(&instance->pdev->dev,
1132                 "Init cmd return status FAILED for SCSI host %d\n",
1133                 instance->host->host_no);
1134
1135         return ret;
1136 }
1137
1138 /**
1139  * megasas_sync_pd_seq_num -    JBOD SEQ MAP
1140  * @instance:           Adapter soft state
1141  * @pend:               set to 1, if it is pended jbod map.
1142  *
1143  * Issue Jbod map to the firmware. If it is pended command,
1144  * issue command and return. If it is first instance of jbod map
1145  * issue and receive command.
1146  */
1147 int
1148 megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) {
1149         int ret = 0;
1150         u32 pd_seq_map_sz;
1151         struct megasas_cmd *cmd;
1152         struct megasas_dcmd_frame *dcmd;
1153         struct fusion_context *fusion = instance->ctrl_context;
1154         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
1155         dma_addr_t pd_seq_h;
1156
1157         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)];
1158         pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)];
1159         pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) +
1160                         (sizeof(struct MR_PD_CFG_SEQ) *
1161                         (MAX_PHYSICAL_DEVICES - 1));
1162
1163         cmd = megasas_get_cmd(instance);
1164         if (!cmd) {
1165                 dev_err(&instance->pdev->dev,
1166                         "Could not get mfi cmd. Fail from %s %d\n",
1167                         __func__, __LINE__);
1168                 return -ENOMEM;
1169         }
1170
1171         dcmd = &cmd->frame->dcmd;
1172
1173         memset(pd_sync, 0, pd_seq_map_sz);
1174         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1175
1176         if (pend) {
1177                 dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1178                 dcmd->flags = MFI_FRAME_DIR_WRITE;
1179                 instance->jbod_seq_cmd = cmd;
1180         } else {
1181                 dcmd->flags = MFI_FRAME_DIR_READ;
1182         }
1183
1184         dcmd->cmd = MFI_CMD_DCMD;
1185         dcmd->cmd_status = 0xFF;
1186         dcmd->sge_count = 1;
1187         dcmd->timeout = 0;
1188         dcmd->pad_0 = 0;
1189         dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz);
1190         dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO);
1191
1192         megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz);
1193
1194         if (pend) {
1195                 instance->instancet->issue_dcmd(instance, cmd);
1196                 return 0;
1197         }
1198
1199         /* Below code is only for non pended DCMD */
1200         if (!instance->mask_interrupts)
1201                 ret = megasas_issue_blocked_cmd(instance, cmd,
1202                         MFI_IO_TIMEOUT_SECS);
1203         else
1204                 ret = megasas_issue_polled(instance, cmd);
1205
1206         if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) {
1207                 dev_warn(&instance->pdev->dev,
1208                         "driver supports max %d JBOD, but FW reports %d\n",
1209                         MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count));
1210                 ret = -EINVAL;
1211         }
1212
1213         if (ret == DCMD_TIMEOUT)
1214                 megaraid_sas_kill_hba(instance);
1215
1216         if (ret == DCMD_SUCCESS)
1217                 instance->pd_seq_map_id++;
1218
1219         megasas_return_cmd(instance, cmd);
1220         return ret;
1221 }
1222
1223 /*
1224  * megasas_get_ld_map_info -    Returns FW's ld_map structure
1225  * @instance:                           Adapter soft state
1226  * @pend:                               Pend the command or not
1227  * Issues an internal command (DCMD) to get the FW's controller PD
1228  * list structure.  This information is mainly used to find out SYSTEM
1229  * supported by the FW.
1230  * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
1231  * dcmd.mbox.b[0]       - number of LDs being sync'd
1232  * dcmd.mbox.b[1]       - 0 - complete command immediately.
1233  *                      - 1 - pend till config change
1234  * dcmd.mbox.b[2]       - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
1235  *                      - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
1236  *                              uses extended struct MR_FW_RAID_MAP_EXT
1237  */
1238 static int
1239 megasas_get_ld_map_info(struct megasas_instance *instance)
1240 {
1241         int ret = 0;
1242         struct megasas_cmd *cmd;
1243         struct megasas_dcmd_frame *dcmd;
1244         void *ci;
1245         dma_addr_t ci_h = 0;
1246         u32 size_map_info;
1247         struct fusion_context *fusion;
1248
1249         cmd = megasas_get_cmd(instance);
1250
1251         if (!cmd) {
1252                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n");
1253                 return -ENOMEM;
1254         }
1255
1256         fusion = instance->ctrl_context;
1257
1258         if (!fusion) {
1259                 megasas_return_cmd(instance, cmd);
1260                 return -ENXIO;
1261         }
1262
1263         dcmd = &cmd->frame->dcmd;
1264
1265         size_map_info = fusion->current_map_sz;
1266
1267         ci = (void *) fusion->ld_map[(instance->map_id & 1)];
1268         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
1269
1270         if (!ci) {
1271                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n");
1272                 megasas_return_cmd(instance, cmd);
1273                 return -ENOMEM;
1274         }
1275
1276         memset(ci, 0, fusion->max_map_sz);
1277         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1278         dcmd->cmd = MFI_CMD_DCMD;
1279         dcmd->cmd_status = 0xFF;
1280         dcmd->sge_count = 1;
1281         dcmd->flags = MFI_FRAME_DIR_READ;
1282         dcmd->timeout = 0;
1283         dcmd->pad_0 = 0;
1284         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1285         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1286
1287         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1288
1289         if (!instance->mask_interrupts)
1290                 ret = megasas_issue_blocked_cmd(instance, cmd,
1291                         MFI_IO_TIMEOUT_SECS);
1292         else
1293                 ret = megasas_issue_polled(instance, cmd);
1294
1295         if (ret == DCMD_TIMEOUT)
1296                 megaraid_sas_kill_hba(instance);
1297
1298         megasas_return_cmd(instance, cmd);
1299
1300         return ret;
1301 }
1302
1303 u8
1304 megasas_get_map_info(struct megasas_instance *instance)
1305 {
1306         struct fusion_context *fusion = instance->ctrl_context;
1307
1308         fusion->fast_path_io = 0;
1309         if (!megasas_get_ld_map_info(instance)) {
1310                 if (MR_ValidateMapInfo(instance, instance->map_id)) {
1311                         fusion->fast_path_io = 1;
1312                         return 0;
1313                 }
1314         }
1315         return 1;
1316 }
1317
1318 /*
1319  * megasas_sync_map_info -      Returns FW's ld_map structure
1320  * @instance:                           Adapter soft state
1321  *
1322  * Issues an internal command (DCMD) to get the FW's controller PD
1323  * list structure.  This information is mainly used to find out SYSTEM
1324  * supported by the FW.
1325  */
1326 int
1327 megasas_sync_map_info(struct megasas_instance *instance)
1328 {
1329         int i;
1330         struct megasas_cmd *cmd;
1331         struct megasas_dcmd_frame *dcmd;
1332         u16 num_lds;
1333         u32 size_sync_info;
1334         struct fusion_context *fusion;
1335         struct MR_LD_TARGET_SYNC *ci = NULL;
1336         struct MR_DRV_RAID_MAP_ALL *map;
1337         struct MR_LD_RAID  *raid;
1338         struct MR_LD_TARGET_SYNC *ld_sync;
1339         dma_addr_t ci_h = 0;
1340         u32 size_map_info;
1341
1342         cmd = megasas_get_cmd(instance);
1343
1344         if (!cmd) {
1345                 dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n");
1346                 return -ENOMEM;
1347         }
1348
1349         fusion = instance->ctrl_context;
1350
1351         if (!fusion) {
1352                 megasas_return_cmd(instance, cmd);
1353                 return 1;
1354         }
1355
1356         map = fusion->ld_drv_map[instance->map_id & 1];
1357
1358         num_lds = le16_to_cpu(map->raidMap.ldCount);
1359
1360         dcmd = &cmd->frame->dcmd;
1361
1362         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
1363
1364         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1365
1366         ci = (struct MR_LD_TARGET_SYNC *)
1367           fusion->ld_map[(instance->map_id - 1) & 1];
1368         memset(ci, 0, fusion->max_map_sz);
1369
1370         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
1371
1372         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
1373
1374         for (i = 0; i < num_lds; i++, ld_sync++) {
1375                 raid = MR_LdRaidGet(i, map);
1376                 ld_sync->targetId = MR_GetLDTgtId(i, map);
1377                 ld_sync->seqNum = raid->seqNum;
1378         }
1379
1380         size_map_info = fusion->current_map_sz;
1381
1382         dcmd->cmd = MFI_CMD_DCMD;
1383         dcmd->cmd_status = 0xFF;
1384         dcmd->sge_count = 1;
1385         dcmd->flags = MFI_FRAME_DIR_WRITE;
1386         dcmd->timeout = 0;
1387         dcmd->pad_0 = 0;
1388         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
1389         dcmd->mbox.b[0] = num_lds;
1390         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
1391         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
1392
1393         megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info);
1394
1395         instance->map_update_cmd = cmd;
1396
1397         instance->instancet->issue_dcmd(instance, cmd);
1398
1399         return 0;
1400 }
1401
1402 /*
1403  * meagasas_display_intel_branding - Display branding string
1404  * @instance: per adapter object
1405  *
1406  * Return nothing.
1407  */
1408 static void
1409 megasas_display_intel_branding(struct megasas_instance *instance)
1410 {
1411         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
1412                 return;
1413
1414         switch (instance->pdev->device) {
1415         case PCI_DEVICE_ID_LSI_INVADER:
1416                 switch (instance->pdev->subsystem_device) {
1417                 case MEGARAID_INTEL_RS3DC080_SSDID:
1418                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1419                                 instance->host->host_no,
1420                                 MEGARAID_INTEL_RS3DC080_BRANDING);
1421                         break;
1422                 case MEGARAID_INTEL_RS3DC040_SSDID:
1423                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1424                                 instance->host->host_no,
1425                                 MEGARAID_INTEL_RS3DC040_BRANDING);
1426                         break;
1427                 case MEGARAID_INTEL_RS3SC008_SSDID:
1428                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1429                                 instance->host->host_no,
1430                                 MEGARAID_INTEL_RS3SC008_BRANDING);
1431                         break;
1432                 case MEGARAID_INTEL_RS3MC044_SSDID:
1433                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1434                                 instance->host->host_no,
1435                                 MEGARAID_INTEL_RS3MC044_BRANDING);
1436                         break;
1437                 default:
1438                         break;
1439                 }
1440                 break;
1441         case PCI_DEVICE_ID_LSI_FURY:
1442                 switch (instance->pdev->subsystem_device) {
1443                 case MEGARAID_INTEL_RS3WC080_SSDID:
1444                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1445                                 instance->host->host_no,
1446                                 MEGARAID_INTEL_RS3WC080_BRANDING);
1447                         break;
1448                 case MEGARAID_INTEL_RS3WC040_SSDID:
1449                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1450                                 instance->host->host_no,
1451                                 MEGARAID_INTEL_RS3WC040_BRANDING);
1452                         break;
1453                 default:
1454                         break;
1455                 }
1456                 break;
1457         case PCI_DEVICE_ID_LSI_CUTLASS_52:
1458         case PCI_DEVICE_ID_LSI_CUTLASS_53:
1459                 switch (instance->pdev->subsystem_device) {
1460                 case MEGARAID_INTEL_RMS3BC160_SSDID:
1461                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
1462                                 instance->host->host_no,
1463                                 MEGARAID_INTEL_RMS3BC160_BRANDING);
1464                         break;
1465                 default:
1466                         break;
1467                 }
1468                 break;
1469         default:
1470                 break;
1471         }
1472 }
1473
1474 /**
1475  * megasas_allocate_raid_maps - Allocate memory for RAID maps
1476  * @instance:                           Adapter soft state
1477  *
1478  * return:                              if success: return 0
1479  *                                      failed:  return -ENOMEM
1480  */
1481 static inline int megasas_allocate_raid_maps(struct megasas_instance *instance)
1482 {
1483         struct fusion_context *fusion;
1484         int i = 0;
1485
1486         fusion = instance->ctrl_context;
1487
1488         fusion->drv_map_pages = get_order(fusion->drv_map_sz);
1489
1490         for (i = 0; i < 2; i++) {
1491                 fusion->ld_map[i] = NULL;
1492
1493                 fusion->ld_drv_map[i] = (void *)
1494                         __get_free_pages(__GFP_ZERO | GFP_KERNEL,
1495                                          fusion->drv_map_pages);
1496
1497                 if (!fusion->ld_drv_map[i]) {
1498                         fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz);
1499
1500                         if (!fusion->ld_drv_map[i]) {
1501                                 dev_err(&instance->pdev->dev,
1502                                         "Could not allocate memory for local map"
1503                                         " size requested: %d\n",
1504                                         fusion->drv_map_sz);
1505                                 goto ld_drv_map_alloc_fail;
1506                         }
1507                 }
1508         }
1509
1510         for (i = 0; i < 2; i++) {
1511                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1512                                                        fusion->max_map_sz,
1513                                                        &fusion->ld_map_phys[i],
1514                                                        GFP_KERNEL);
1515                 if (!fusion->ld_map[i]) {
1516                         dev_err(&instance->pdev->dev,
1517                                 "Could not allocate memory for map info %s:%d\n",
1518                                 __func__, __LINE__);
1519                         goto ld_map_alloc_fail;
1520                 }
1521         }
1522
1523         return 0;
1524
1525 ld_map_alloc_fail:
1526         for (i = 0; i < 2; i++) {
1527                 if (fusion->ld_map[i])
1528                         dma_free_coherent(&instance->pdev->dev,
1529                                           fusion->max_map_sz,
1530                                           fusion->ld_map[i],
1531                                           fusion->ld_map_phys[i]);
1532         }
1533
1534 ld_drv_map_alloc_fail:
1535         for (i = 0; i < 2; i++) {
1536                 if (fusion->ld_drv_map[i]) {
1537                         if (is_vmalloc_addr(fusion->ld_drv_map[i]))
1538                                 vfree(fusion->ld_drv_map[i]);
1539                         else
1540                                 free_pages((ulong)fusion->ld_drv_map[i],
1541                                            fusion->drv_map_pages);
1542                 }
1543         }
1544
1545         return -ENOMEM;
1546 }
1547
1548 /**
1549  * megasas_configure_queue_sizes -      Calculate size of request desc queue,
1550  *                                      reply desc queue,
1551  *                                      IO request frame queue, set can_queue.
1552  * @instance:                           Adapter soft state
1553  * @return:                             void
1554  */
1555 static inline
1556 void megasas_configure_queue_sizes(struct megasas_instance *instance)
1557 {
1558         struct fusion_context *fusion;
1559         u16 max_cmd;
1560
1561         fusion = instance->ctrl_context;
1562         max_cmd = instance->max_fw_cmds;
1563
1564         if (instance->adapter_type >= VENTURA_SERIES)
1565                 instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS;
1566         else
1567                 instance->max_mpt_cmds = instance->max_fw_cmds;
1568
1569         instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds;
1570         instance->cur_can_queue = instance->max_scsi_cmds;
1571         instance->host->can_queue = instance->cur_can_queue;
1572
1573         fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16;
1574
1575         fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *
1576                                           instance->max_mpt_cmds;
1577         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *
1578                                         (fusion->reply_q_depth);
1579         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
1580                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1581                  * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */
1582 }
1583
1584 static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance)
1585 {
1586         struct fusion_context *fusion;
1587         struct megasas_cmd *cmd;
1588
1589         fusion = instance->ctrl_context;
1590
1591         cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL);
1592
1593         if (!cmd) {
1594                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1595                         __func__, __LINE__);
1596                 return -ENOMEM;
1597         }
1598
1599         cmd->frame = dma_alloc_coherent(&instance->pdev->dev,
1600                                         IOC_INIT_FRAME_SIZE,
1601                                         &cmd->frame_phys_addr, GFP_KERNEL);
1602
1603         if (!cmd->frame) {
1604                 dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n",
1605                         __func__, __LINE__);
1606                 kfree(cmd);
1607                 return -ENOMEM;
1608         }
1609
1610         fusion->ioc_init_cmd = cmd;
1611         return 0;
1612 }
1613
1614 /**
1615  * megasas_free_ioc_init_cmd -  Free IOC INIT command frame
1616  * @instance:           Adapter soft state
1617  */
1618 static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
1619 {
1620         struct fusion_context *fusion;
1621
1622         fusion = instance->ctrl_context;
1623
1624         if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame)
1625                 dma_free_coherent(&instance->pdev->dev,
1626                                   IOC_INIT_FRAME_SIZE,
1627                                   fusion->ioc_init_cmd->frame,
1628                                   fusion->ioc_init_cmd->frame_phys_addr);
1629
1630         kfree(fusion->ioc_init_cmd);
1631 }
1632
1633 /**
1634  * megasas_init_adapter_fusion -        Initializes the FW
1635  * @instance:           Adapter soft state
1636  *
1637  * This is the main function for initializing firmware.
1638  */
1639 u32
1640 megasas_init_adapter_fusion(struct megasas_instance *instance)
1641 {
1642         struct megasas_register_set __iomem *reg_set;
1643         struct fusion_context *fusion;
1644         u32 scratch_pad_1;
1645         int i = 0, count;
1646
1647         fusion = instance->ctrl_context;
1648
1649         reg_set = instance->reg_set;
1650
1651         megasas_fusion_update_can_queue(instance, PROBE_CONTEXT);
1652
1653         /*
1654          * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
1655          */
1656         instance->max_mfi_cmds =
1657                 MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
1658
1659         megasas_configure_queue_sizes(instance);
1660
1661         scratch_pad_1 = megasas_readl(instance,
1662                                       &instance->reg_set->outbound_scratch_pad_1);
1663         /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set,
1664          * Firmware support extended IO chain frame which is 4 times more than
1665          * legacy Firmware.
1666          * Legacy Firmware - Frame size is (8 * 128) = 1K
1667          * 1M IO Firmware  - Frame size is (8 * 128 * 4)  = 4K
1668          */
1669         if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK)
1670                 instance->max_chain_frame_sz =
1671                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1672                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO;
1673         else
1674                 instance->max_chain_frame_sz =
1675                         ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >>
1676                         MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO;
1677
1678         if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) {
1679                 dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n",
1680                         instance->max_chain_frame_sz,
1681                         MEGASAS_CHAIN_FRAME_SZ_MIN);
1682                 instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN;
1683         }
1684
1685         fusion->max_sge_in_main_msg =
1686                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE
1687                         - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
1688
1689         fusion->max_sge_in_chain =
1690                 instance->max_chain_frame_sz
1691                         / sizeof(union MPI2_SGE_IO_UNION);
1692
1693         instance->max_num_sge =
1694                 rounddown_pow_of_two(fusion->max_sge_in_main_msg
1695                         + fusion->max_sge_in_chain - 2);
1696
1697         /* Used for pass thru MFI frame (DCMD) */
1698         fusion->chain_offset_mfi_pthru =
1699                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
1700
1701         fusion->chain_offset_io_request =
1702                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1703                  sizeof(union MPI2_SGE_IO_UNION))/16;
1704
1705         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1706         for (i = 0 ; i < count; i++)
1707                 fusion->last_reply_idx[i] = 0;
1708
1709         /*
1710          * For fusion adapters, 3 commands for IOCTL and 8 commands
1711          * for driver's internal DCMDs.
1712          */
1713         instance->max_scsi_cmds = instance->max_fw_cmds -
1714                                 (MEGASAS_FUSION_INTERNAL_CMDS +
1715                                 MEGASAS_FUSION_IOCTL_CMDS);
1716         sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
1717
1718         if (megasas_alloc_ioc_init_frame(instance))
1719                 return 1;
1720
1721         /*
1722          * Allocate memory for descriptors
1723          * Create a pool of commands
1724          */
1725         if (megasas_alloc_cmds(instance))
1726                 goto fail_alloc_mfi_cmds;
1727         if (megasas_alloc_cmds_fusion(instance))
1728                 goto fail_alloc_cmds;
1729
1730         if (megasas_ioc_init_fusion(instance))
1731                 goto fail_ioc_init;
1732
1733         megasas_display_intel_branding(instance);
1734         if (megasas_get_ctrl_info(instance)) {
1735                 dev_err(&instance->pdev->dev,
1736                         "Could not get controller info. Fail from %s %d\n",
1737                         __func__, __LINE__);
1738                 goto fail_ioc_init;
1739         }
1740
1741         instance->flag_ieee = 1;
1742         instance->r1_ldio_hint_default =  MR_R1_LDIO_PIGGYBACK_DEFAULT;
1743         fusion->fast_path_io = 0;
1744
1745         if (megasas_allocate_raid_maps(instance))
1746                 goto fail_ioc_init;
1747
1748         if (!megasas_get_map_info(instance))
1749                 megasas_sync_map_info(instance);
1750
1751         return 0;
1752
1753 fail_ioc_init:
1754         megasas_free_cmds_fusion(instance);
1755 fail_alloc_cmds:
1756         megasas_free_cmds(instance);
1757 fail_alloc_mfi_cmds:
1758         megasas_free_ioc_init_cmd(instance);
1759         return 1;
1760 }
1761
1762 /**
1763  * megasas_fault_detect_work    -       Worker function of
1764  *                                      FW fault handling workqueue.
1765  */
1766 static void
1767 megasas_fault_detect_work(struct work_struct *work)
1768 {
1769         struct megasas_instance *instance =
1770                 container_of(work, struct megasas_instance,
1771                              fw_fault_work.work);
1772         u32 fw_state, dma_state, status;
1773
1774         /* Check the fw state */
1775         fw_state = instance->instancet->read_fw_status_reg(instance) &
1776                         MFI_STATE_MASK;
1777
1778         if (fw_state == MFI_STATE_FAULT) {
1779                 dma_state = instance->instancet->read_fw_status_reg(instance) &
1780                                 MFI_STATE_DMADONE;
1781                 /* Start collecting crash, if DMA bit is done */
1782                 if (instance->crash_dump_drv_support &&
1783                     instance->crash_dump_app_support && dma_state) {
1784                         megasas_fusion_crash_dump(instance);
1785                 } else {
1786                         if (instance->unload == 0) {
1787                                 status = megasas_reset_fusion(instance->host, 0);
1788                                 if (status != SUCCESS) {
1789                                         dev_err(&instance->pdev->dev,
1790                                                 "Failed from %s %d, do not re-arm timer\n",
1791                                                 __func__, __LINE__);
1792                                         return;
1793                                 }
1794                         }
1795                 }
1796         }
1797
1798         if (instance->fw_fault_work_q)
1799                 queue_delayed_work(instance->fw_fault_work_q,
1800                         &instance->fw_fault_work,
1801                         msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1802 }
1803
1804 int
1805 megasas_fusion_start_watchdog(struct megasas_instance *instance)
1806 {
1807         /* Check if the Fault WQ is already started */
1808         if (instance->fw_fault_work_q)
1809                 return SUCCESS;
1810
1811         INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work);
1812
1813         snprintf(instance->fault_handler_work_q_name,
1814                  sizeof(instance->fault_handler_work_q_name),
1815                  "poll_megasas%d_status", instance->host->host_no);
1816
1817         instance->fw_fault_work_q =
1818                 create_singlethread_workqueue(instance->fault_handler_work_q_name);
1819         if (!instance->fw_fault_work_q) {
1820                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
1821                         __func__, __LINE__);
1822                 return FAILED;
1823         }
1824
1825         queue_delayed_work(instance->fw_fault_work_q,
1826                            &instance->fw_fault_work,
1827                            msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL));
1828
1829         return SUCCESS;
1830 }
1831
1832 void
1833 megasas_fusion_stop_watchdog(struct megasas_instance *instance)
1834 {
1835         struct workqueue_struct *wq;
1836
1837         if (instance->fw_fault_work_q) {
1838                 wq = instance->fw_fault_work_q;
1839                 instance->fw_fault_work_q = NULL;
1840                 if (!cancel_delayed_work_sync(&instance->fw_fault_work))
1841                         flush_workqueue(wq);
1842                 destroy_workqueue(wq);
1843         }
1844 }
1845
1846 /**
1847  * map_cmd_status -     Maps FW cmd status to OS cmd status
1848  * @cmd :               Pointer to cmd
1849  * @status :            status of cmd returned by FW
1850  * @ext_status :        ext status of cmd returned by FW
1851  */
1852
1853 void
1854 map_cmd_status(struct fusion_context *fusion,
1855                 struct scsi_cmnd *scmd, u8 status, u8 ext_status,
1856                 u32 data_length, u8 *sense)
1857 {
1858         u8 cmd_type;
1859         int resid;
1860
1861         cmd_type = megasas_cmd_type(scmd);
1862         switch (status) {
1863
1864         case MFI_STAT_OK:
1865                 scmd->result = DID_OK << 16;
1866                 break;
1867
1868         case MFI_STAT_SCSI_IO_FAILED:
1869         case MFI_STAT_LD_INIT_IN_PROGRESS:
1870                 scmd->result = (DID_ERROR << 16) | ext_status;
1871                 break;
1872
1873         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1874
1875                 scmd->result = (DID_OK << 16) | ext_status;
1876                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1877                         memset(scmd->sense_buffer, 0,
1878                                SCSI_SENSE_BUFFERSIZE);
1879                         memcpy(scmd->sense_buffer, sense,
1880                                SCSI_SENSE_BUFFERSIZE);
1881                         scmd->result |= DRIVER_SENSE << 24;
1882                 }
1883
1884                 /*
1885                  * If the  IO request is partially completed, then MR FW will
1886                  * update "io_request->DataLength" field with actual number of
1887                  * bytes transferred.Driver will set residual bytes count in
1888                  * SCSI command structure.
1889                  */
1890                 resid = (scsi_bufflen(scmd) - data_length);
1891                 scsi_set_resid(scmd, resid);
1892
1893                 if (resid &&
1894                         ((cmd_type == READ_WRITE_LDIO) ||
1895                         (cmd_type == READ_WRITE_SYSPDIO)))
1896                         scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len"
1897                                 " requested/completed 0x%x/0x%x\n",
1898                                 status, scsi_bufflen(scmd), data_length);
1899                 break;
1900
1901         case MFI_STAT_LD_OFFLINE:
1902         case MFI_STAT_DEVICE_NOT_FOUND:
1903                 scmd->result = DID_BAD_TARGET << 16;
1904                 break;
1905         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1906                 scmd->result = DID_IMM_RETRY << 16;
1907                 break;
1908         default:
1909                 scmd->result = DID_ERROR << 16;
1910                 break;
1911         }
1912 }
1913
1914 /**
1915  * megasas_is_prp_possible -
1916  * Checks if native NVMe PRPs can be built for the IO
1917  *
1918  * @instance:           Adapter soft state
1919  * @scmd:               SCSI command from the mid-layer
1920  * @sge_count:          scatter gather element count.
1921  *
1922  * Returns:             true: PRPs can be built
1923  *                      false: IEEE SGLs needs to be built
1924  */
1925 static bool
1926 megasas_is_prp_possible(struct megasas_instance *instance,
1927                         struct scsi_cmnd *scmd, int sge_count)
1928 {
1929         struct fusion_context *fusion;
1930         int i;
1931         u32 data_length = 0;
1932         struct scatterlist *sg_scmd;
1933         bool build_prp = false;
1934         u32 mr_nvme_pg_size;
1935
1936         mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
1937                                 MR_DEFAULT_NVME_PAGE_SIZE);
1938         fusion = instance->ctrl_context;
1939         data_length = scsi_bufflen(scmd);
1940         sg_scmd = scsi_sglist(scmd);
1941
1942         /*
1943          * NVMe uses one PRP for each page (or part of a page)
1944          * look at the data length - if 4 pages or less then IEEE is OK
1945          * if  > 5 pages then we need to build a native SGL
1946          * if > 4 and <= 5 pages, then check physical address of 1st SG entry
1947          * if this first size in the page is >= the residual beyond 4 pages
1948          * then use IEEE, otherwise use native SGL
1949          */
1950
1951         if (data_length > (mr_nvme_pg_size * 5)) {
1952                 build_prp = true;
1953         } else if ((data_length > (mr_nvme_pg_size * 4)) &&
1954                         (data_length <= (mr_nvme_pg_size * 5)))  {
1955                 /* check if 1st SG entry size is < residual beyond 4 pages */
1956                 if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4)))
1957                         build_prp = true;
1958         }
1959
1960 /*
1961  * Below code detects gaps/holes in IO data buffers.
1962  * What does holes/gaps mean?
1963  * Any SGE except first one in a SGL starts at non NVME page size
1964  * aligned address OR Any SGE except last one in a SGL ends at
1965  * non NVME page size boundary.
1966  *
1967  * Driver has already informed block layer by setting boundary rules for
1968  * bio merging done at NVME page size boundary calling kernel API
1969  * blk_queue_virt_boundary inside slave_config.
1970  * Still there is possibility of IO coming with holes to driver because of
1971  * IO merging done by IO scheduler.
1972  *
1973  * With SCSI BLK MQ enabled, there will be no IO with holes as there is no
1974  * IO scheduling so no IO merging.
1975  *
1976  * With SCSI BLK MQ disabled, IO scheduler may attempt to merge IOs and
1977  * then sending IOs with holes.
1978  *
1979  * Though driver can request block layer to disable IO merging by calling-
1980  * blk_queue_flag_set(QUEUE_FLAG_NOMERGES, sdev->request_queue) but
1981  * user may tune sysfs parameter- nomerges again to 0 or 1.
1982  *
1983  * If in future IO scheduling is enabled with SCSI BLK MQ,
1984  * this algorithm to detect holes will be required in driver
1985  * for SCSI BLK MQ enabled case as well.
1986  *
1987  *
1988  */
1989         scsi_for_each_sg(scmd, sg_scmd, sge_count, i) {
1990                 if ((i != 0) && (i != (sge_count - 1))) {
1991                         if (mega_mod64(sg_dma_len(sg_scmd), mr_nvme_pg_size) ||
1992                             mega_mod64(sg_dma_address(sg_scmd),
1993                                        mr_nvme_pg_size)) {
1994                                 build_prp = false;
1995                                 atomic_inc(&instance->sge_holes_type1);
1996                                 break;
1997                         }
1998                 }
1999
2000                 if ((sge_count > 1) && (i == 0)) {
2001                         if ((mega_mod64((sg_dma_address(sg_scmd) +
2002                                         sg_dma_len(sg_scmd)),
2003                                         mr_nvme_pg_size))) {
2004                                 build_prp = false;
2005                                 atomic_inc(&instance->sge_holes_type2);
2006                                 break;
2007                         }
2008                 }
2009
2010                 if ((sge_count > 1) && (i == (sge_count - 1))) {
2011                         if (mega_mod64(sg_dma_address(sg_scmd),
2012                                        mr_nvme_pg_size)) {
2013                                 build_prp = false;
2014                                 atomic_inc(&instance->sge_holes_type3);
2015                                 break;
2016                         }
2017                 }
2018         }
2019
2020         return build_prp;
2021 }
2022
2023 /**
2024  * megasas_make_prp_nvme -
2025  * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only
2026  *
2027  * @instance:           Adapter soft state
2028  * @scmd:               SCSI command from the mid-layer
2029  * @sgl_ptr:            SGL to be filled in
2030  * @cmd:                Fusion command frame
2031  * @sge_count:          scatter gather element count.
2032  *
2033  * Returns:             true: PRPs are built
2034  *                      false: IEEE SGLs needs to be built
2035  */
2036 static bool
2037 megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd,
2038                       struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2039                       struct megasas_cmd_fusion *cmd, int sge_count)
2040 {
2041         int sge_len, offset, num_prp_in_chain = 0;
2042         struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl;
2043         u64 *ptr_sgl;
2044         dma_addr_t ptr_sgl_phys;
2045         u64 sge_addr;
2046         u32 page_mask, page_mask_result;
2047         struct scatterlist *sg_scmd;
2048         u32 first_prp_len;
2049         bool build_prp = false;
2050         int data_len = scsi_bufflen(scmd);
2051         struct fusion_context *fusion;
2052         u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size,
2053                                         MR_DEFAULT_NVME_PAGE_SIZE);
2054
2055         fusion = instance->ctrl_context;
2056
2057         build_prp = megasas_is_prp_possible(instance, scmd, sge_count);
2058
2059         if (!build_prp)
2060                 return false;
2061
2062         /*
2063          * Nvme has a very convoluted prp format.  One prp is required
2064          * for each page or partial page. Driver need to split up OS sg_list
2065          * entries if it is longer than one page or cross a page
2066          * boundary.  Driver also have to insert a PRP list pointer entry as
2067          * the last entry in each physical page of the PRP list.
2068          *
2069          * NOTE: The first PRP "entry" is actually placed in the first
2070          * SGL entry in the main message as IEEE 64 format.  The 2nd
2071          * entry in the main message is the chain element, and the rest
2072          * of the PRP entries are built in the contiguous pcie buffer.
2073          */
2074         page_mask = mr_nvme_pg_size - 1;
2075         ptr_sgl = (u64 *)cmd->sg_frame;
2076         ptr_sgl_phys = cmd->sg_frame_phys_addr;
2077         memset(ptr_sgl, 0, instance->max_chain_frame_sz);
2078
2079         /* Build chain frame element which holds all prps except first*/
2080         main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *)
2081             ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64));
2082
2083         main_chain_element->Address = cpu_to_le64(ptr_sgl_phys);
2084         main_chain_element->NextChainOffset = 0;
2085         main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2086                                         IEEE_SGE_FLAGS_SYSTEM_ADDR |
2087                                         MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP;
2088
2089         /* Build first prp, sge need not to be page aligned*/
2090         ptr_first_sgl = sgl_ptr;
2091         sg_scmd = scsi_sglist(scmd);
2092         sge_addr = sg_dma_address(sg_scmd);
2093         sge_len = sg_dma_len(sg_scmd);
2094
2095         offset = (u32)(sge_addr & page_mask);
2096         first_prp_len = mr_nvme_pg_size - offset;
2097
2098         ptr_first_sgl->Address = cpu_to_le64(sge_addr);
2099         ptr_first_sgl->Length = cpu_to_le32(first_prp_len);
2100
2101         data_len -= first_prp_len;
2102
2103         if (sge_len > first_prp_len) {
2104                 sge_addr += first_prp_len;
2105                 sge_len -= first_prp_len;
2106         } else if (sge_len == first_prp_len) {
2107                 sg_scmd = sg_next(sg_scmd);
2108                 sge_addr = sg_dma_address(sg_scmd);
2109                 sge_len = sg_dma_len(sg_scmd);
2110         }
2111
2112         for (;;) {
2113                 offset = (u32)(sge_addr & page_mask);
2114
2115                 /* Put PRP pointer due to page boundary*/
2116                 page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask;
2117                 if (unlikely(!page_mask_result)) {
2118                         scmd_printk(KERN_NOTICE,
2119                                     scmd, "page boundary ptr_sgl: 0x%p\n",
2120                                     ptr_sgl);
2121                         ptr_sgl_phys += 8;
2122                         *ptr_sgl = cpu_to_le64(ptr_sgl_phys);
2123                         ptr_sgl++;
2124                         num_prp_in_chain++;
2125                 }
2126
2127                 *ptr_sgl = cpu_to_le64(sge_addr);
2128                 ptr_sgl++;
2129                 ptr_sgl_phys += 8;
2130                 num_prp_in_chain++;
2131
2132                 sge_addr += mr_nvme_pg_size;
2133                 sge_len -= mr_nvme_pg_size;
2134                 data_len -= mr_nvme_pg_size;
2135
2136                 if (data_len <= 0)
2137                         break;
2138
2139                 if (sge_len > 0)
2140                         continue;
2141
2142                 sg_scmd = sg_next(sg_scmd);
2143                 sge_addr = sg_dma_address(sg_scmd);
2144                 sge_len = sg_dma_len(sg_scmd);
2145         }
2146
2147         main_chain_element->Length =
2148                         cpu_to_le32(num_prp_in_chain * sizeof(u64));
2149
2150         atomic_inc(&instance->prp_sgl);
2151         return build_prp;
2152 }
2153
2154 /**
2155  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
2156  * @instance:           Adapter soft state
2157  * @scp:                SCSI command from the mid-layer
2158  * @sgl_ptr:            SGL to be filled in
2159  * @cmd:                cmd we are working on
2160  * @sge_count           sge count
2161  *
2162  */
2163 static void
2164 megasas_make_sgl_fusion(struct megasas_instance *instance,
2165                         struct scsi_cmnd *scp,
2166                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
2167                         struct megasas_cmd_fusion *cmd, int sge_count)
2168 {
2169         int i, sg_processed;
2170         struct scatterlist *os_sgl;
2171         struct fusion_context *fusion;
2172
2173         fusion = instance->ctrl_context;
2174
2175         if (instance->adapter_type >= INVADER_SERIES) {
2176                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
2177                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2178                 sgl_ptr_end->Flags = 0;
2179         }
2180
2181         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
2182                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
2183                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
2184                 sgl_ptr->Flags = 0;
2185                 if (instance->adapter_type >= INVADER_SERIES)
2186                         if (i == sge_count - 1)
2187                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
2188                 sgl_ptr++;
2189                 sg_processed = i + 1;
2190
2191                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
2192                     (sge_count > fusion->max_sge_in_main_msg)) {
2193
2194                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
2195                         if (instance->adapter_type >= INVADER_SERIES) {
2196                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
2197                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
2198                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
2199                                         cmd->io_request->ChainOffset =
2200                                                 fusion->
2201                                                 chain_offset_io_request;
2202                                 else
2203                                         cmd->io_request->ChainOffset = 0;
2204                         } else
2205                                 cmd->io_request->ChainOffset =
2206                                         fusion->chain_offset_io_request;
2207
2208                         sg_chain = sgl_ptr;
2209                         /* Prepare chain element */
2210                         sg_chain->NextChainOffset = 0;
2211                         if (instance->adapter_type >= INVADER_SERIES)
2212                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
2213                         else
2214                                 sg_chain->Flags =
2215                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2216                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
2217                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
2218                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
2219
2220                         sgl_ptr =
2221                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
2222                         memset(sgl_ptr, 0, instance->max_chain_frame_sz);
2223                 }
2224         }
2225         atomic_inc(&instance->ieee_sgl);
2226 }
2227
2228 /**
2229  * megasas_make_sgl -   Build Scatter Gather List(SGLs)
2230  * @scp:                SCSI command pointer
2231  * @instance:           Soft instance of controller
2232  * @cmd:                Fusion command pointer
2233  *
2234  * This function will build sgls based on device type.
2235  * For nvme drives, there is different way of building sgls in nvme native
2236  * format- PRPs(Physical Region Page).
2237  *
2238  * Returns the number of sg lists actually used, zero if the sg lists
2239  * is NULL, or -ENOMEM if the mapping failed
2240  */
2241 static
2242 int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp,
2243                      struct megasas_cmd_fusion *cmd)
2244 {
2245         int sge_count;
2246         bool build_prp = false;
2247         struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64;
2248
2249         sge_count = scsi_dma_map(scp);
2250
2251         if ((sge_count > instance->max_num_sge) || (sge_count <= 0))
2252                 return sge_count;
2253
2254         sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL;
2255         if ((le16_to_cpu(cmd->io_request->IoFlags) &
2256             MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) &&
2257             (cmd->pd_interface == NVME_PD))
2258                 build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64,
2259                                                   cmd, sge_count);
2260
2261         if (!build_prp)
2262                 megasas_make_sgl_fusion(instance, scp, sgl_chain64,
2263                                         cmd, sge_count);
2264
2265         return sge_count;
2266 }
2267
2268 /**
2269  * megasas_set_pd_lba - Sets PD LBA
2270  * @cdb:                CDB
2271  * @cdb_len:            cdb length
2272  * @start_blk:          Start block of IO
2273  *
2274  * Used to set the PD LBA in CDB for FP IOs
2275  */
2276 void
2277 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
2278                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
2279                    struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
2280 {
2281         struct MR_LD_RAID *raid;
2282         u16 ld;
2283         u64 start_blk = io_info->pdBlock;
2284         u8 *cdb = io_request->CDB.CDB32;
2285         u32 num_blocks = io_info->numBlocks;
2286         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
2287
2288         /* Check if T10 PI (DIF) is enabled for this LD */
2289         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
2290         raid = MR_LdRaidGet(ld, local_map_ptr);
2291         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
2292                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2293                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
2294                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
2295
2296                 if (scp->sc_data_direction == DMA_FROM_DEVICE)
2297                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
2298                 else
2299                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
2300                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
2301
2302                 /* LBA */
2303                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
2304                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
2305                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
2306                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
2307                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
2308                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
2309                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
2310                 cdb[19] = (u8)(start_blk & 0xff);
2311
2312                 /* Logical block reference tag */
2313                 io_request->CDB.EEDP32.PrimaryReferenceTag =
2314                         cpu_to_be32(ref_tag);
2315                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff);
2316                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
2317
2318                 /* Transfer length */
2319                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
2320                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
2321                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
2322                 cdb[31] = (u8)(num_blocks & 0xff);
2323
2324                 /* set SCSI IO EEDPFlags */
2325                 if (scp->sc_data_direction == DMA_FROM_DEVICE) {
2326                         io_request->EEDPFlags = cpu_to_le16(
2327                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
2328                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
2329                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
2330                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
2331                                 MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE |
2332                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
2333                 } else {
2334                         io_request->EEDPFlags = cpu_to_le16(
2335                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
2336                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
2337                 }
2338                 io_request->Control |= cpu_to_le32((0x4 << 26));
2339                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
2340         } else {
2341                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
2342                 if (((cdb_len == 12) || (cdb_len == 16)) &&
2343                     (start_blk <= 0xffffffff)) {
2344                         if (cdb_len == 16) {
2345                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
2346                                 flagvals = cdb[1];
2347                                 groupnum = cdb[14];
2348                                 control = cdb[15];
2349                         } else {
2350                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
2351                                 flagvals = cdb[1];
2352                                 groupnum = cdb[10];
2353                                 control = cdb[11];
2354                         }
2355
2356                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2357
2358                         cdb[0] = opcode;
2359                         cdb[1] = flagvals;
2360                         cdb[6] = groupnum;
2361                         cdb[9] = control;
2362
2363                         /* Transfer length */
2364                         cdb[8] = (u8)(num_blocks & 0xff);
2365                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
2366
2367                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
2368                         cdb_len = 10;
2369                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
2370                         /* Convert to 16 byte CDB for large LBA's */
2371                         switch (cdb_len) {
2372                         case 6:
2373                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
2374                                 control = cdb[5];
2375                                 break;
2376                         case 10:
2377                                 opcode =
2378                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
2379                                 flagvals = cdb[1];
2380                                 groupnum = cdb[6];
2381                                 control = cdb[9];
2382                                 break;
2383                         case 12:
2384                                 opcode =
2385                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
2386                                 flagvals = cdb[1];
2387                                 groupnum = cdb[10];
2388                                 control = cdb[11];
2389                                 break;
2390                         }
2391
2392                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
2393
2394                         cdb[0] = opcode;
2395                         cdb[1] = flagvals;
2396                         cdb[14] = groupnum;
2397                         cdb[15] = control;
2398
2399                         /* Transfer length */
2400                         cdb[13] = (u8)(num_blocks & 0xff);
2401                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
2402                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
2403                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
2404
2405                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
2406                         cdb_len = 16;
2407                 }
2408
2409                 /* Normal case, just load LBA here */
2410                 switch (cdb_len) {
2411                 case 6:
2412                 {
2413                         u8 val = cdb[1] & 0xE0;
2414                         cdb[3] = (u8)(start_blk & 0xff);
2415                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
2416                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
2417                         break;
2418                 }
2419                 case 10:
2420                         cdb[5] = (u8)(start_blk & 0xff);
2421                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
2422                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
2423                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
2424                         break;
2425                 case 12:
2426                         cdb[5]    = (u8)(start_blk & 0xff);
2427                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
2428                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
2429                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
2430                         break;
2431                 case 16:
2432                         cdb[9]    = (u8)(start_blk & 0xff);
2433                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
2434                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
2435                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
2436                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
2437                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
2438                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
2439                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
2440                         break;
2441                 }
2442         }
2443 }
2444
2445 /**
2446  * megasas_stream_detect -      stream detection on read and and write IOs
2447  * @instance:           Adapter soft state
2448  * @cmd:                    Command to be prepared
2449  * @io_info:            IO Request info
2450  *
2451  */
2452
2453 /** stream detection on read and and write IOs */
2454 static void megasas_stream_detect(struct megasas_instance *instance,
2455                                   struct megasas_cmd_fusion *cmd,
2456                                   struct IO_REQUEST_INFO *io_info)
2457 {
2458         struct fusion_context *fusion = instance->ctrl_context;
2459         u32 device_id = io_info->ldTgtId;
2460         struct LD_STREAM_DETECT *current_ld_sd
2461                 = fusion->stream_detect_by_ld[device_id];
2462         u32 *track_stream = &current_ld_sd->mru_bit_map, stream_num;
2463         u32 shifted_values, unshifted_values;
2464         u32 index_value_mask, shifted_values_mask;
2465         int i;
2466         bool is_read_ahead = false;
2467         struct STREAM_DETECT *current_sd;
2468         /* find possible stream */
2469         for (i = 0; i < MAX_STREAMS_TRACKED; ++i) {
2470                 stream_num = (*track_stream >>
2471                         (i * BITS_PER_INDEX_STREAM)) &
2472                         STREAM_MASK;
2473                 current_sd = &current_ld_sd->stream_track[stream_num];
2474                 /* if we found a stream, update the raid
2475                  *  context and also update the mruBitMap
2476                  */
2477                 /*      boundary condition */
2478                 if ((current_sd->next_seq_lba) &&
2479                     (io_info->ldStartBlock >= current_sd->next_seq_lba) &&
2480                     (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) &&
2481                     (current_sd->is_read == io_info->isRead)) {
2482
2483                         if ((io_info->ldStartBlock != current_sd->next_seq_lba) &&
2484                             ((!io_info->isRead) || (!is_read_ahead)))
2485                                 /*
2486                                  * Once the API availible we need to change this.
2487                                  * At this point we are not allowing any gap
2488                                  */
2489                                 continue;
2490
2491                         SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35);
2492                         current_sd->next_seq_lba =
2493                         io_info->ldStartBlock + io_info->numBlocks;
2494                         /*
2495                          *      update the mruBitMap LRU
2496                          */
2497                         shifted_values_mask =
2498                                 (1 <<  i * BITS_PER_INDEX_STREAM) - 1;
2499                         shifted_values = ((*track_stream & shifted_values_mask)
2500                                                 << BITS_PER_INDEX_STREAM);
2501                         index_value_mask =
2502                                 STREAM_MASK << i * BITS_PER_INDEX_STREAM;
2503                         unshifted_values =
2504                                 *track_stream & ~(shifted_values_mask |
2505                                 index_value_mask);
2506                         *track_stream =
2507                                 unshifted_values | shifted_values | stream_num;
2508                         return;
2509                 }
2510         }
2511         /*
2512          * if we did not find any stream, create a new one
2513          * from the least recently used
2514          */
2515         stream_num = (*track_stream >>
2516                 ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) &
2517                 STREAM_MASK;
2518         current_sd = &current_ld_sd->stream_track[stream_num];
2519         current_sd->is_read = io_info->isRead;
2520         current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks;
2521         *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num);
2522         return;
2523 }
2524
2525 /**
2526  * megasas_set_raidflag_cpu_affinity - This function sets the cpu
2527  * affinity (cpu of the controller) and raid_flags in the raid context
2528  * based on IO type.
2529  *
2530  * @praid_context:      IO RAID context
2531  * @raid:               LD raid map
2532  * @fp_possible:        Is fast path possible?
2533  * @is_read:            Is read IO?
2534  *
2535  */
2536 static void
2537 megasas_set_raidflag_cpu_affinity(union RAID_CONTEXT_UNION *praid_context,
2538                                   struct MR_LD_RAID *raid, bool fp_possible,
2539                                   u8 is_read, u32 scsi_buff_len)
2540 {
2541         u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2542         struct RAID_CONTEXT_G35 *rctx_g35;
2543
2544         rctx_g35 = &praid_context->raid_context_g35;
2545         if (fp_possible) {
2546                 if (is_read) {
2547                         if ((raid->cpuAffinity.pdRead.cpu0) &&
2548                             (raid->cpuAffinity.pdRead.cpu1))
2549                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2550                         else if (raid->cpuAffinity.pdRead.cpu1)
2551                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2552                 } else {
2553                         if ((raid->cpuAffinity.pdWrite.cpu0) &&
2554                             (raid->cpuAffinity.pdWrite.cpu1))
2555                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2556                         else if (raid->cpuAffinity.pdWrite.cpu1)
2557                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2558                         /* Fast path cache by pass capable R0/R1 VD */
2559                         if ((raid->level <= 1) &&
2560                             (raid->capability.fp_cache_bypass_capable)) {
2561                                 rctx_g35->routing_flags |=
2562                                         (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT);
2563                                 rctx_g35->raid_flags =
2564                                         (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
2565                                         << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2566                         }
2567                 }
2568         } else {
2569                 if (is_read) {
2570                         if ((raid->cpuAffinity.ldRead.cpu0) &&
2571                             (raid->cpuAffinity.ldRead.cpu1))
2572                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2573                         else if (raid->cpuAffinity.ldRead.cpu1)
2574                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2575                 } else {
2576                         if ((raid->cpuAffinity.ldWrite.cpu0) &&
2577                             (raid->cpuAffinity.ldWrite.cpu1))
2578                                 cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
2579                         else if (raid->cpuAffinity.ldWrite.cpu1)
2580                                 cpu_sel = MR_RAID_CTX_CPUSEL_1;
2581
2582                         if (is_stream_detected(rctx_g35) &&
2583                             ((raid->level == 5) || (raid->level == 6)) &&
2584                             (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
2585                             (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
2586                                 cpu_sel = MR_RAID_CTX_CPUSEL_0;
2587                 }
2588         }
2589
2590         rctx_g35->routing_flags |=
2591                 (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2592
2593         /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2594          * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS.
2595          * IO Subtype is not bitmap.
2596          */
2597         if ((raid->level == 1) && (!is_read)) {
2598                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2599                         praid_context->raid_context_g35.raid_flags =
2600                                 (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT
2601                                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
2602         }
2603 }
2604
2605 /**
2606  * megasas_build_ldio_fusion -  Prepares IOs to devices
2607  * @instance:           Adapter soft state
2608  * @scp:                SCSI command
2609  * @cmd:                Command to be prepared
2610  *
2611  * Prepares the io_request and chain elements (sg_frame) for IO
2612  * The IO can be for PD (Fast Path) or LD
2613  */
2614 void
2615 megasas_build_ldio_fusion(struct megasas_instance *instance,
2616                           struct scsi_cmnd *scp,
2617                           struct megasas_cmd_fusion *cmd)
2618 {
2619         bool fp_possible;
2620         u16 ld;
2621         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
2622         u32 scsi_buff_len;
2623         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2624         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2625         struct IO_REQUEST_INFO io_info;
2626         struct fusion_context *fusion;
2627         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2628         u8 *raidLUN;
2629         unsigned long spinlock_flags;
2630         struct MR_LD_RAID *raid = NULL;
2631         struct MR_PRIV_DEVICE *mrdev_priv;
2632         struct RAID_CONTEXT *rctx;
2633         struct RAID_CONTEXT_G35 *rctx_g35;
2634
2635         device_id = MEGASAS_DEV_INDEX(scp);
2636
2637         fusion = instance->ctrl_context;
2638
2639         io_request = cmd->io_request;
2640         rctx = &io_request->RaidContext.raid_context;
2641         rctx_g35 = &io_request->RaidContext.raid_context_g35;
2642
2643         rctx->virtual_disk_tgt_id = cpu_to_le16(device_id);
2644         rctx->status = 0;
2645         rctx->ex_status = 0;
2646
2647         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
2648
2649         start_lba_lo = 0;
2650         start_lba_hi = 0;
2651         fp_possible = false;
2652
2653         /*
2654          * 6-byte READ(0x08) or WRITE(0x0A) cdb
2655          */
2656         if (scp->cmd_len == 6) {
2657                 datalength = (u32) scp->cmnd[4];
2658                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
2659                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
2660
2661                 start_lba_lo &= 0x1FFFFF;
2662         }
2663
2664         /*
2665          * 10-byte READ(0x28) or WRITE(0x2A) cdb
2666          */
2667         else if (scp->cmd_len == 10) {
2668                 datalength = (u32) scp->cmnd[8] |
2669                         ((u32) scp->cmnd[7] << 8);
2670                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2671                         ((u32) scp->cmnd[3] << 16) |
2672                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2673         }
2674
2675         /*
2676          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
2677          */
2678         else if (scp->cmd_len == 12) {
2679                 datalength = ((u32) scp->cmnd[6] << 24) |
2680                         ((u32) scp->cmnd[7] << 16) |
2681                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2682                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
2683                         ((u32) scp->cmnd[3] << 16) |
2684                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2685         }
2686
2687         /*
2688          * 16-byte READ(0x88) or WRITE(0x8A) cdb
2689          */
2690         else if (scp->cmd_len == 16) {
2691                 datalength = ((u32) scp->cmnd[10] << 24) |
2692                         ((u32) scp->cmnd[11] << 16) |
2693                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
2694                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
2695                         ((u32) scp->cmnd[7] << 16) |
2696                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
2697
2698                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
2699                         ((u32) scp->cmnd[3] << 16) |
2700                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
2701         }
2702
2703         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
2704         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
2705         io_info.numBlocks = datalength;
2706         io_info.ldTgtId = device_id;
2707         io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2708         scsi_buff_len = scsi_bufflen(scp);
2709         io_request->DataLength = cpu_to_le32(scsi_buff_len);
2710
2711         if (scp->sc_data_direction == DMA_FROM_DEVICE)
2712                 io_info.isRead = 1;
2713
2714         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2715         ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2716
2717         if (ld < instance->fw_supported_vd_count)
2718                 raid = MR_LdRaidGet(ld, local_map_ptr);
2719
2720         if (!raid || (!fusion->fast_path_io)) {
2721                 rctx->reg_lock_flags  = 0;
2722                 fp_possible = false;
2723         } else {
2724                 if (MR_BuildRaidContext(instance, &io_info, rctx,
2725                                         local_map_ptr, &raidLUN))
2726                         fp_possible = (io_info.fpOkForIo > 0) ? true : false;
2727         }
2728
2729         cmd->request_desc->SCSIIO.MSIxIndex =
2730                 instance->reply_map[raw_smp_processor_id()];
2731
2732         if (instance->adapter_type >= VENTURA_SERIES) {
2733                 /* FP for Optimal raid level 1.
2734                  * All large RAID-1 writes (> 32 KiB, both WT and WB modes)
2735                  * are built by the driver as LD I/Os.
2736                  * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os
2737                  * (there is never a reason to process these as buffered writes)
2738                  * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os
2739                  * with the SLD bit asserted.
2740                  */
2741                 if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
2742                         mrdev_priv = scp->device->hostdata;
2743
2744                         if (atomic_inc_return(&instance->fw_outstanding) >
2745                                 (instance->host->can_queue)) {
2746                                 fp_possible = false;
2747                                 atomic_dec(&instance->fw_outstanding);
2748                         } else if ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) ||
2749                                    (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0)) {
2750                                 fp_possible = false;
2751                                 atomic_dec(&instance->fw_outstanding);
2752                                 if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)
2753                                         atomic_set(&mrdev_priv->r1_ldio_hint,
2754                                                    instance->r1_ldio_hint_default);
2755                         }
2756                 }
2757
2758                 if (!fp_possible ||
2759                     (io_info.isRead && io_info.ra_capable)) {
2760                         spin_lock_irqsave(&instance->stream_lock,
2761                                           spinlock_flags);
2762                         megasas_stream_detect(instance, cmd, &io_info);
2763                         spin_unlock_irqrestore(&instance->stream_lock,
2764                                                spinlock_flags);
2765                         /* In ventura if stream detected for a read and it is
2766                          * read ahead capable make this IO as LDIO
2767                          */
2768                         if (is_stream_detected(rctx_g35))
2769                                 fp_possible = false;
2770                 }
2771
2772                 /* If raid is NULL, set CPU affinity to default CPU0 */
2773                 if (raid)
2774                         megasas_set_raidflag_cpu_affinity(&io_request->RaidContext,
2775                                 raid, fp_possible, io_info.isRead,
2776                                 scsi_buff_len);
2777                 else
2778                         rctx_g35->routing_flags |=
2779                                 (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT);
2780         }
2781
2782         if (fp_possible) {
2783                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
2784                                    local_map_ptr, start_lba_lo);
2785                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2786                 cmd->request_desc->SCSIIO.RequestFlags =
2787                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO
2788                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2789                 if (instance->adapter_type == INVADER_SERIES) {
2790                         if (rctx->reg_lock_flags == REGION_TYPE_UNUSED)
2791                                 cmd->request_desc->SCSIIO.RequestFlags =
2792                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2793                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2794                         rctx->type = MPI2_TYPE_CUDA;
2795                         rctx->nseg = 0x1;
2796                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2797                         rctx->reg_lock_flags |=
2798                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
2799                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
2800                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2801                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2802                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2803                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2804                         io_request->IoFlags |=
2805                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
2806                 }
2807                 if (fusion->load_balance_info &&
2808                         (fusion->load_balance_info[device_id].loadBalanceFlag) &&
2809                         (io_info.isRead)) {
2810                         io_info.devHandle =
2811                                 get_updated_dev_handle(instance,
2812                                         &fusion->load_balance_info[device_id],
2813                                         &io_info, local_map_ptr);
2814                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
2815                         cmd->pd_r1_lb = io_info.pd_after_lb;
2816                         if (instance->adapter_type >= VENTURA_SERIES)
2817                                 rctx_g35->span_arm = io_info.span_arm;
2818                         else
2819                                 rctx->span_arm = io_info.span_arm;
2820
2821                 } else
2822                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
2823
2824                 if (instance->adapter_type >= VENTURA_SERIES)
2825                         cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
2826                 else
2827                         cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
2828
2829                 if ((raidLUN[0] == 1) &&
2830                         (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
2831                         instance->dev_handle = !(instance->dev_handle);
2832                         io_info.devHandle =
2833                                 local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle];
2834                 }
2835
2836                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
2837                 io_request->DevHandle = io_info.devHandle;
2838                 cmd->pd_interface = io_info.pd_interface;
2839                 /* populate the LUN field */
2840                 memcpy(io_request->LUN, raidLUN, 8);
2841         } else {
2842                 rctx->timeout_value =
2843                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
2844                 cmd->request_desc->SCSIIO.RequestFlags =
2845                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
2846                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2847                 if (instance->adapter_type == INVADER_SERIES) {
2848                         if (io_info.do_fp_rlbypass ||
2849                         (rctx->reg_lock_flags == REGION_TYPE_UNUSED))
2850                                 cmd->request_desc->SCSIIO.RequestFlags =
2851                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
2852                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2853                         rctx->type = MPI2_TYPE_CUDA;
2854                         rctx->reg_lock_flags |=
2855                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
2856                                         MR_RL_FLAGS_SEQ_NUM_ENABLE);
2857                         rctx->nseg = 0x1;
2858                 } else if (instance->adapter_type >= VENTURA_SERIES) {
2859                         rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
2860                         rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT);
2861                         rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
2862                 }
2863                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2864                 io_request->DevHandle = cpu_to_le16(device_id);
2865
2866         } /* Not FP */
2867 }
2868
2869 /**
2870  * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk
2871  * @instance:           Adapter soft state
2872  * @scp:                SCSI command
2873  * @cmd:                Command to be prepared
2874  *
2875  * Prepares the io_request frame for non-rw io cmds for vd.
2876  */
2877 static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
2878                           struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd)
2879 {
2880         u32 device_id;
2881         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2882         u16 ld;
2883         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2884         struct fusion_context *fusion = instance->ctrl_context;
2885         u8                          span, physArm;
2886         __le16                      devHandle;
2887         u32                         arRef, pd;
2888         struct MR_LD_RAID                  *raid;
2889         struct RAID_CONTEXT                *pRAID_Context;
2890         u8 fp_possible = 1;
2891
2892         io_request = cmd->io_request;
2893         device_id = MEGASAS_DEV_INDEX(scmd);
2894         local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
2895         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
2896         /* get RAID_Context pointer */
2897         pRAID_Context = &io_request->RaidContext.raid_context;
2898         /* Check with FW team */
2899         pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
2900         pRAID_Context->reg_lock_row_lba    = 0;
2901         pRAID_Context->reg_lock_length    = 0;
2902
2903         if (fusion->fast_path_io && (
2904                 device_id < instance->fw_supported_vd_count)) {
2905
2906                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
2907                 if (ld >= instance->fw_supported_vd_count - 1)
2908                         fp_possible = 0;
2909                 else {
2910                         raid = MR_LdRaidGet(ld, local_map_ptr);
2911                         if (!(raid->capability.fpNonRWCapable))
2912                                 fp_possible = 0;
2913                 }
2914         } else
2915                 fp_possible = 0;
2916
2917         if (!fp_possible) {
2918                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
2919                 io_request->DevHandle = cpu_to_le16(device_id);
2920                 io_request->LUN[1] = scmd->device->lun;
2921                 pRAID_Context->timeout_value =
2922                         cpu_to_le16 (scmd->request->timeout / HZ);
2923                 cmd->request_desc->SCSIIO.RequestFlags =
2924                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
2925                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2926         } else {
2927
2928                 /* set RAID context values */
2929                 pRAID_Context->config_seq_num = raid->seqNum;
2930                 if (instance->adapter_type < VENTURA_SERIES)
2931                         pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ;
2932                 pRAID_Context->timeout_value =
2933                         cpu_to_le16(raid->fpIoTimeoutForLd);
2934
2935                 /* get the DevHandle for the PD (since this is
2936                    fpNonRWCapable, this is a single disk RAID0) */
2937                 span = physArm = 0;
2938                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
2939                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
2940                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
2941
2942                 /* build request descriptor */
2943                 cmd->request_desc->SCSIIO.RequestFlags =
2944                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
2945                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2946                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
2947
2948                 /* populate the LUN field */
2949                 memcpy(io_request->LUN, raid->LUN, 8);
2950
2951                 /* build the raidScsiIO structure */
2952                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
2953                 io_request->DevHandle = devHandle;
2954         }
2955 }
2956
2957 /**
2958  * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd
2959  * @instance:           Adapter soft state
2960  * @scp:                SCSI command
2961  * @cmd:                Command to be prepared
2962  * @fp_possible:        parameter to detect fast path or firmware path io.
2963  *
2964  * Prepares the io_request frame for rw/non-rw io cmds for syspds
2965  */
2966 static void
2967 megasas_build_syspd_fusion(struct megasas_instance *instance,
2968         struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
2969         bool fp_possible)
2970 {
2971         u32 device_id;
2972         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
2973         u16 pd_index = 0;
2974         u16 os_timeout_value;
2975         u16 timeout_limit;
2976         struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
2977         struct RAID_CONTEXT     *pRAID_Context;
2978         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
2979         struct MR_PRIV_DEVICE *mr_device_priv_data;
2980         struct fusion_context *fusion = instance->ctrl_context;
2981         pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1];
2982
2983         device_id = MEGASAS_DEV_INDEX(scmd);
2984         pd_index = MEGASAS_PD_INDEX(scmd);
2985         os_timeout_value = scmd->request->timeout / HZ;
2986         mr_device_priv_data = scmd->device->hostdata;
2987         cmd->pd_interface = mr_device_priv_data->interface_type;
2988
2989         io_request = cmd->io_request;
2990         /* get RAID_Context pointer */
2991         pRAID_Context = &io_request->RaidContext.raid_context;
2992         pRAID_Context->reg_lock_flags = 0;
2993         pRAID_Context->reg_lock_row_lba = 0;
2994         pRAID_Context->reg_lock_length = 0;
2995         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
2996         io_request->LUN[1] = scmd->device->lun;
2997         pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD
2998                 << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
2999
3000         /* If FW supports PD sequence number */
3001         if (instance->use_seqnum_jbod_fp &&
3002                 instance->pd_list[pd_index].driveType == TYPE_DISK) {
3003                 /* TgtId must be incremented by 255 as jbod seq number is index
3004                  * below raid map
3005                  */
3006                  /* More than 256 PD/JBOD support for Ventura */
3007                 if (instance->support_morethan256jbod)
3008                         pRAID_Context->virtual_disk_tgt_id =
3009                                 pd_sync->seq[pd_index].pd_target_id;
3010                 else
3011                         pRAID_Context->virtual_disk_tgt_id =
3012                                 cpu_to_le16(device_id + (MAX_PHYSICAL_DEVICES - 1));
3013                 pRAID_Context->config_seq_num = pd_sync->seq[pd_index].seqNum;
3014                 io_request->DevHandle = pd_sync->seq[pd_index].devHandle;
3015                 if (instance->adapter_type >= VENTURA_SERIES) {
3016                         io_request->RaidContext.raid_context_g35.routing_flags |=
3017                                 (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT);
3018                         io_request->RaidContext.raid_context_g35.nseg_type |=
3019                                                         (1 << RAID_CONTEXT_NSEG_SHIFT);
3020                         io_request->RaidContext.raid_context_g35.nseg_type |=
3021                                                         (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT);
3022                 } else {
3023                         pRAID_Context->type = MPI2_TYPE_CUDA;
3024                         pRAID_Context->nseg = 0x1;
3025                         pRAID_Context->reg_lock_flags |=
3026                                 (MR_RL_FLAGS_SEQ_NUM_ENABLE|MR_RL_FLAGS_GRANT_DESTINATION_CUDA);
3027                 }
3028         } else if (fusion->fast_path_io) {
3029                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3030                 pRAID_Context->config_seq_num = 0;
3031                 local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
3032                 io_request->DevHandle =
3033                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
3034         } else {
3035                 /* Want to send all IO via FW path */
3036                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3037                 pRAID_Context->config_seq_num = 0;
3038                 io_request->DevHandle = cpu_to_le16(0xFFFF);
3039         }
3040
3041         cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
3042
3043         cmd->request_desc->SCSIIO.MSIxIndex =
3044                 instance->reply_map[raw_smp_processor_id()];
3045
3046         if (!fp_possible) {
3047                 /* system pd firmware path */
3048                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
3049                 cmd->request_desc->SCSIIO.RequestFlags =
3050                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3051                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3052                 pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
3053                 pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
3054         } else {
3055                 if (os_timeout_value)
3056                         os_timeout_value++;
3057
3058                 /* system pd Fast Path */
3059                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
3060                 timeout_limit = (scmd->device->type == TYPE_DISK) ?
3061                                 255 : 0xFFFF;
3062                 pRAID_Context->timeout_value =
3063                         cpu_to_le16((os_timeout_value > timeout_limit) ?
3064                         timeout_limit : os_timeout_value);
3065                 if (instance->adapter_type >= INVADER_SERIES)
3066                         io_request->IoFlags |=
3067                                 cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
3068
3069                 cmd->request_desc->SCSIIO.RequestFlags =
3070                         (MPI2_REQ_DESCRIPT_FLAGS_FP_IO <<
3071                                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3072         }
3073 }
3074
3075 /**
3076  * megasas_build_io_fusion -    Prepares IOs to devices
3077  * @instance:           Adapter soft state
3078  * @scp:                SCSI command
3079  * @cmd:                Command to be prepared
3080  *
3081  * Invokes helper functions to prepare request frames
3082  * and sets flags appropriate for IO/Non-IO cmd
3083  */
3084 int
3085 megasas_build_io_fusion(struct megasas_instance *instance,
3086                         struct scsi_cmnd *scp,
3087                         struct megasas_cmd_fusion *cmd)
3088 {
3089         int sge_count;
3090         u8  cmd_type;
3091         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
3092         struct MR_PRIV_DEVICE *mr_device_priv_data;
3093         mr_device_priv_data = scp->device->hostdata;
3094
3095         /* Zero out some fields so they don't get reused */
3096         memset(io_request->LUN, 0x0, 8);
3097         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
3098         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
3099         io_request->EEDPFlags = 0;
3100         io_request->Control = 0;
3101         io_request->EEDPBlockSize = 0;
3102         io_request->ChainOffset = 0;
3103         io_request->RaidContext.raid_context.raid_flags = 0;
3104         io_request->RaidContext.raid_context.type = 0;
3105         io_request->RaidContext.raid_context.nseg = 0;
3106
3107         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
3108         /*
3109          * Just the CDB length,rest of the Flags are zero
3110          * This will be modified for FP in build_ldio_fusion
3111          */
3112         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
3113
3114         switch (cmd_type = megasas_cmd_type(scp)) {
3115         case READ_WRITE_LDIO:
3116                 megasas_build_ldio_fusion(instance, scp, cmd);
3117                 break;
3118         case NON_READ_WRITE_LDIO:
3119                 megasas_build_ld_nonrw_fusion(instance, scp, cmd);
3120                 break;
3121         case READ_WRITE_SYSPDIO:
3122                 megasas_build_syspd_fusion(instance, scp, cmd, true);
3123                 break;
3124         case NON_READ_WRITE_SYSPDIO:
3125                 if (instance->secure_jbod_support ||
3126                     mr_device_priv_data->is_tm_capable)
3127                         megasas_build_syspd_fusion(instance, scp, cmd, false);
3128                 else
3129                         megasas_build_syspd_fusion(instance, scp, cmd, true);
3130                 break;
3131         default:
3132                 break;
3133         }
3134
3135         /*
3136          * Construct SGL
3137          */
3138
3139         sge_count = megasas_make_sgl(instance, scp, cmd);
3140
3141         if (sge_count > instance->max_num_sge || (sge_count < 0)) {
3142                 dev_err(&instance->pdev->dev,
3143                         "%s %d sge_count (%d) is out of range. Range is:  0-%d\n",
3144                         __func__, __LINE__, sge_count, instance->max_num_sge);
3145                 return 1;
3146         }
3147
3148         if (instance->adapter_type >= VENTURA_SERIES) {
3149                 set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count);
3150                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags);
3151                 cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type);
3152         } else {
3153                 /* numSGE store lower 8 bit of sge_count.
3154                  * numSGEExt store higher 8 bit of sge_count
3155                  */
3156                 io_request->RaidContext.raid_context.num_sge = sge_count;
3157                 io_request->RaidContext.raid_context.num_sge_ext =
3158                         (u8)(sge_count >> 8);
3159         }
3160
3161         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
3162
3163         if (scp->sc_data_direction == DMA_TO_DEVICE)
3164                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
3165         else if (scp->sc_data_direction == DMA_FROM_DEVICE)
3166                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
3167
3168         io_request->SGLOffset0 =
3169                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
3170
3171         io_request->SenseBufferLowAddress =
3172                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
3173         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
3174
3175         cmd->scmd = scp;
3176         scp->SCp.ptr = (char *)cmd;
3177
3178         return 0;
3179 }
3180
3181 static union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3182 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
3183 {
3184         u8 *p;
3185         struct fusion_context *fusion;
3186
3187         fusion = instance->ctrl_context;
3188         p = fusion->req_frames_desc +
3189                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index;
3190
3191         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
3192 }
3193
3194
3195 /* megasas_prepate_secondRaid1_IO
3196  *  It prepares the raid 1 second IO
3197  */
3198 void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
3199                             struct megasas_cmd_fusion *cmd,
3200                             struct megasas_cmd_fusion *r1_cmd)
3201 {
3202         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
3203         struct fusion_context *fusion;
3204         fusion = instance->ctrl_context;
3205         req_desc = cmd->request_desc;
3206         /* copy the io request frame as well as 8 SGEs data for r1 command*/
3207         memcpy(r1_cmd->io_request, cmd->io_request,
3208                (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
3209         memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
3210                (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
3211         /*sense buffer is different for r1 command*/
3212         r1_cmd->io_request->SenseBufferLowAddress =
3213                         cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr));
3214         r1_cmd->scmd = cmd->scmd;
3215         req_desc2 = megasas_get_request_descriptor(instance,
3216                                                    (r1_cmd->index - 1));
3217         req_desc2->Words = 0;
3218         r1_cmd->request_desc = req_desc2;
3219         req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
3220         req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
3221         r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
3222         r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
3223         r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
3224         cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
3225                         cpu_to_le16(r1_cmd->index);
3226         r1_cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
3227                         cpu_to_le16(cmd->index);
3228         /*MSIxIndex of both commands request descriptors should be same*/
3229         r1_cmd->request_desc->SCSIIO.MSIxIndex =
3230                         cmd->request_desc->SCSIIO.MSIxIndex;
3231         /*span arm is different for r1 cmd*/
3232         r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
3233                         cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
3234 }
3235
3236 /**
3237  * megasas_build_and_issue_cmd_fusion -Main routine for building and
3238  *                                     issuing non IOCTL cmd
3239  * @instance:                   Adapter soft state
3240  * @scmd:                       pointer to scsi cmd from OS
3241  */
3242 static u32
3243 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
3244                                    struct scsi_cmnd *scmd)
3245 {
3246         struct megasas_cmd_fusion *cmd, *r1_cmd = NULL;
3247         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3248         u32 index;
3249         struct fusion_context *fusion;
3250
3251         fusion = instance->ctrl_context;
3252
3253         if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) &&
3254                 instance->ldio_threshold &&
3255                 (atomic_inc_return(&instance->ldio_outstanding) >
3256                 instance->ldio_threshold)) {
3257                 atomic_dec(&instance->ldio_outstanding);
3258                 return SCSI_MLQUEUE_DEVICE_BUSY;
3259         }
3260
3261         if (atomic_inc_return(&instance->fw_outstanding) >
3262                         instance->host->can_queue) {
3263                 atomic_dec(&instance->fw_outstanding);
3264                 return SCSI_MLQUEUE_HOST_BUSY;
3265         }
3266
3267         cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
3268
3269         if (!cmd) {
3270                 atomic_dec(&instance->fw_outstanding);
3271                 return SCSI_MLQUEUE_HOST_BUSY;
3272         }
3273
3274         index = cmd->index;
3275
3276         req_desc = megasas_get_request_descriptor(instance, index-1);
3277
3278         req_desc->Words = 0;
3279         cmd->request_desc = req_desc;
3280
3281         if (megasas_build_io_fusion(instance, scmd, cmd)) {
3282                 megasas_return_cmd_fusion(instance, cmd);
3283                 dev_err(&instance->pdev->dev, "Error building command\n");
3284                 cmd->request_desc = NULL;
3285                 atomic_dec(&instance->fw_outstanding);
3286                 return SCSI_MLQUEUE_HOST_BUSY;
3287         }
3288
3289         req_desc = cmd->request_desc;
3290         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3291
3292         if (cmd->io_request->ChainOffset != 0 &&
3293             cmd->io_request->ChainOffset != 0xF)
3294                 dev_err(&instance->pdev->dev, "The chain offset value is not "
3295                        "correct : %x\n", cmd->io_request->ChainOffset);
3296         /*
3297          *      if it is raid 1/10 fp write capable.
3298          *      try to get second command from pool and construct it.
3299          *      From FW, it has confirmed that lba values of two PDs
3300          *      corresponds to single R1/10 LD are always same
3301          *
3302          */
3303         /*      driver side count always should be less than max_fw_cmds
3304          *      to get new command
3305          */
3306         if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
3307                 r1_cmd = megasas_get_cmd_fusion(instance,
3308                                 (scmd->request->tag + instance->max_fw_cmds));
3309                 megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
3310         }
3311
3312
3313         /*
3314          * Issue the command to the FW
3315          */
3316
3317         megasas_fire_cmd_fusion(instance, req_desc);
3318
3319         if (r1_cmd)
3320                 megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
3321
3322
3323         return 0;
3324 }
3325
3326 /**
3327  * megasas_complete_r1_command -
3328  * completes R1 FP write commands which has valid peer smid
3329  * @instance:                   Adapter soft state
3330  * @cmd_fusion:                 MPT command frame
3331  *
3332  */
3333 static inline void
3334 megasas_complete_r1_command(struct megasas_instance *instance,
3335                             struct megasas_cmd_fusion *cmd)
3336 {
3337         u8 *sense, status, ex_status;
3338         u32 data_length;
3339         u16 peer_smid;
3340         struct fusion_context *fusion;
3341         struct megasas_cmd_fusion *r1_cmd = NULL;
3342         struct scsi_cmnd *scmd_local = NULL;
3343         struct RAID_CONTEXT_G35 *rctx_g35;
3344
3345         rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
3346         fusion = instance->ctrl_context;
3347         peer_smid = le16_to_cpu(rctx_g35->smid.peer_smid);
3348
3349         r1_cmd = fusion->cmd_list[peer_smid - 1];
3350         scmd_local = cmd->scmd;
3351         status = rctx_g35->status;
3352         ex_status = rctx_g35->ex_status;
3353         data_length = cmd->io_request->DataLength;
3354         sense = cmd->sense;
3355
3356         cmd->cmd_completed = true;
3357
3358         /* Check if peer command is completed or not*/
3359         if (r1_cmd->cmd_completed) {
3360                 rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
3361                 if (rctx_g35->status != MFI_STAT_OK) {
3362                         status = rctx_g35->status;
3363                         ex_status = rctx_g35->ex_status;
3364                         data_length = r1_cmd->io_request->DataLength;
3365                         sense = r1_cmd->sense;
3366                 }
3367
3368                 megasas_return_cmd_fusion(instance, r1_cmd);
3369                 map_cmd_status(fusion, scmd_local, status, ex_status,
3370                                le32_to_cpu(data_length), sense);
3371                 if (instance->ldio_threshold &&
3372                     megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
3373                         atomic_dec(&instance->ldio_outstanding);
3374                 scmd_local->SCp.ptr = NULL;
3375                 megasas_return_cmd_fusion(instance, cmd);
3376                 scsi_dma_unmap(scmd_local);
3377                 scmd_local->scsi_done(scmd_local);
3378         }
3379 }
3380
3381 /**
3382  * complete_cmd_fusion -        Completes command
3383  * @instance:                   Adapter soft state
3384  * Completes all commands that is in reply descriptor queue
3385  */
3386 int
3387 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
3388 {
3389         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
3390         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
3391         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
3392         struct fusion_context *fusion;
3393         struct megasas_cmd *cmd_mfi;
3394         struct megasas_cmd_fusion *cmd_fusion;
3395         u16 smid, num_completed;
3396         u8 reply_descript_type, *sense, status, extStatus;
3397         u32 device_id, data_length;
3398         union desc_value d_val;
3399         struct LD_LOAD_BALANCE_INFO *lbinfo;
3400         int threshold_reply_count = 0;
3401         struct scsi_cmnd *scmd_local = NULL;
3402         struct MR_TASK_MANAGE_REQUEST *mr_tm_req;
3403         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req;
3404
3405         fusion = instance->ctrl_context;
3406
3407         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3408                 return IRQ_HANDLED;
3409
3410         desc = fusion->reply_frames_desc[MSIxIndex] +
3411                                 fusion->last_reply_idx[MSIxIndex];
3412
3413         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3414
3415         d_val.word = desc->Words;
3416
3417         reply_descript_type = reply_desc->ReplyFlags &
3418                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3419
3420         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3421                 return IRQ_NONE;
3422
3423         num_completed = 0;
3424
3425         while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
3426                d_val.u.high != cpu_to_le32(UINT_MAX)) {
3427
3428                 smid = le16_to_cpu(reply_desc->SMID);
3429                 cmd_fusion = fusion->cmd_list[smid - 1];
3430                 scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
3431                                                 cmd_fusion->io_request;
3432
3433                 scmd_local = cmd_fusion->scmd;
3434                 status = scsi_io_req->RaidContext.raid_context.status;
3435                 extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
3436                 sense = cmd_fusion->sense;
3437                 data_length = scsi_io_req->DataLength;
3438
3439                 switch (scsi_io_req->Function) {
3440                 case MPI2_FUNCTION_SCSI_TASK_MGMT:
3441                         mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *)
3442                                                 cmd_fusion->io_request;
3443                         mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *)
3444                                                 &mr_tm_req->TmRequest;
3445                         dev_dbg(&instance->pdev->dev, "TM completion:"
3446                                 "type: 0x%x TaskMID: 0x%x\n",
3447                                 mpi_tm_req->TaskType, mpi_tm_req->TaskMID);
3448                         complete(&cmd_fusion->done);
3449                         break;
3450                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
3451                         /* Update load balancing info */
3452                         if (fusion->load_balance_info &&
3453                             (cmd_fusion->scmd->SCp.Status &
3454                             MEGASAS_LOAD_BALANCE_FLAG)) {
3455                                 device_id = MEGASAS_DEV_INDEX(scmd_local);
3456                                 lbinfo = &fusion->load_balance_info[device_id];
3457                                 atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
3458                                 cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
3459                         }
3460                         /* Fall through - and complete IO */
3461                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
3462                         atomic_dec(&instance->fw_outstanding);
3463                         if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
3464                                 map_cmd_status(fusion, scmd_local, status,
3465                                                extStatus, le32_to_cpu(data_length),
3466                                                sense);
3467                                 if (instance->ldio_threshold &&
3468                                     (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
3469                                         atomic_dec(&instance->ldio_outstanding);
3470                                 scmd_local->SCp.ptr = NULL;
3471                                 megasas_return_cmd_fusion(instance, cmd_fusion);
3472                                 scsi_dma_unmap(scmd_local);
3473                                 scmd_local->scsi_done(scmd_local);
3474                         } else  /* Optimal VD - R1 FP command completion. */
3475                                 megasas_complete_r1_command(instance, cmd_fusion);
3476                         break;
3477                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
3478                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
3479                         /* Poll mode. Dummy free.
3480                          * In case of Interrupt mode, caller has reverse check.
3481                          */
3482                         if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) {
3483                                 cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE;
3484                                 megasas_return_cmd(instance, cmd_mfi);
3485                         } else
3486                                 megasas_complete_cmd(instance, cmd_mfi, DID_OK);
3487                         break;
3488                 }
3489
3490                 fusion->last_reply_idx[MSIxIndex]++;
3491                 if (fusion->last_reply_idx[MSIxIndex] >=
3492                     fusion->reply_q_depth)
3493                         fusion->last_reply_idx[MSIxIndex] = 0;
3494
3495                 desc->Words = cpu_to_le64(ULLONG_MAX);
3496                 num_completed++;
3497                 threshold_reply_count++;
3498
3499                 /* Get the next reply descriptor */
3500                 if (!fusion->last_reply_idx[MSIxIndex])
3501                         desc = fusion->reply_frames_desc[MSIxIndex];
3502                 else
3503                         desc++;
3504
3505                 reply_desc =
3506                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
3507
3508                 d_val.word = desc->Words;
3509
3510                 reply_descript_type = reply_desc->ReplyFlags &
3511                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
3512
3513                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
3514                         break;
3515                 /*
3516                  * Write to reply post host index register after completing threshold
3517                  * number of reply counts and still there are more replies in reply queue
3518                  * pending to be completed
3519                  */
3520                 if (threshold_reply_count >= THRESHOLD_REPLY_COUNT) {
3521                         if (instance->msix_combined)
3522                                 writel(((MSIxIndex & 0x7) << 24) |
3523                                         fusion->last_reply_idx[MSIxIndex],
3524                                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3525                         else
3526                                 writel((MSIxIndex << 24) |
3527                                         fusion->last_reply_idx[MSIxIndex],
3528                                         instance->reply_post_host_index_addr[0]);
3529                         threshold_reply_count = 0;
3530                 }
3531         }
3532
3533         if (!num_completed)
3534                 return IRQ_NONE;
3535
3536         wmb();
3537         if (instance->msix_combined)
3538                 writel(((MSIxIndex & 0x7) << 24) |
3539                         fusion->last_reply_idx[MSIxIndex],
3540                         instance->reply_post_host_index_addr[MSIxIndex/8]);
3541         else
3542                 writel((MSIxIndex << 24) |
3543                         fusion->last_reply_idx[MSIxIndex],
3544                         instance->reply_post_host_index_addr[0]);
3545         megasas_check_and_restore_queue_depth(instance);
3546         return IRQ_HANDLED;
3547 }
3548
3549 /**
3550  * megasas_sync_irqs -  Synchronizes all IRQs owned by adapter
3551  * @instance:                   Adapter soft state
3552  */
3553 void megasas_sync_irqs(unsigned long instance_addr)
3554 {
3555         u32 count, i;
3556         struct megasas_instance *instance =
3557                 (struct megasas_instance *)instance_addr;
3558
3559         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3560
3561         for (i = 0; i < count; i++)
3562                 synchronize_irq(pci_irq_vector(instance->pdev, i));
3563 }
3564
3565 /**
3566  * megasas_complete_cmd_dpc_fusion -    Completes command
3567  * @instance:                   Adapter soft state
3568  *
3569  * Tasklet to complete cmds
3570  */
3571 void
3572 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
3573 {
3574         struct megasas_instance *instance =
3575                 (struct megasas_instance *)instance_addr;
3576         u32 count, MSIxIndex;
3577
3578         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
3579
3580         /* If we have already declared adapter dead, donot complete cmds */
3581         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)
3582                 return;
3583
3584         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
3585                 complete_cmd_fusion(instance, MSIxIndex);
3586 }
3587
3588 /**
3589  * megasas_isr_fusion - isr entry point
3590  */
3591 irqreturn_t megasas_isr_fusion(int irq, void *devp)
3592 {
3593         struct megasas_irq_context *irq_context = devp;
3594         struct megasas_instance *instance = irq_context->instance;
3595         u32 mfiStatus;
3596
3597         if (instance->mask_interrupts)
3598                 return IRQ_NONE;
3599
3600         if (!instance->msix_vectors) {
3601                 mfiStatus = instance->instancet->clear_intr(instance);
3602                 if (!mfiStatus)
3603                         return IRQ_NONE;
3604         }
3605
3606         /* If we are resetting, bail */
3607         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
3608                 instance->instancet->clear_intr(instance);
3609                 return IRQ_HANDLED;
3610         }
3611
3612         return complete_cmd_fusion(instance, irq_context->MSIxIndex);
3613 }
3614
3615 /**
3616  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
3617  * @instance:                   Adapter soft state
3618  * mfi_cmd:                     megasas_cmd pointer
3619  *
3620  */
3621 void
3622 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
3623                         struct megasas_cmd *mfi_cmd)
3624 {
3625         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
3626         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
3627         struct megasas_cmd_fusion *cmd;
3628         struct fusion_context *fusion;
3629         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
3630
3631         fusion = instance->ctrl_context;
3632
3633         cmd = megasas_get_cmd_fusion(instance,
3634                         instance->max_scsi_cmds + mfi_cmd->index);
3635
3636         /*  Save the smid. To be used for returning the cmd */
3637         mfi_cmd->context.smid = cmd->index;
3638
3639         /*
3640          * For cmds where the flag is set, store the flag and check
3641          * on completion. For cmds with this flag, don't call
3642          * megasas_complete_cmd
3643          */
3644
3645         if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE))
3646                 mfi_cmd->flags |= DRV_DCMD_POLLED_MODE;
3647
3648         io_req = cmd->io_request;
3649
3650         if (instance->adapter_type >= INVADER_SERIES) {
3651                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
3652                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
3653                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
3654                 sgl_ptr_end->Flags = 0;
3655         }
3656
3657         mpi25_ieee_chain =
3658           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
3659
3660         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
3661         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
3662                                        SGL) / 4;
3663         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
3664
3665         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
3666
3667         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
3668                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
3669
3670         mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size);
3671 }
3672
3673 /**
3674  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
3675  * @instance:                   Adapter soft state
3676  * @cmd:                        mfi cmd to build
3677  *
3678  */
3679 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
3680 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
3681 {
3682         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL;
3683         u16 index;
3684
3685         build_mpt_mfi_pass_thru(instance, cmd);
3686         index = cmd->context.smid;
3687
3688         req_desc = megasas_get_request_descriptor(instance, index - 1);
3689
3690         req_desc->Words = 0;
3691         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
3692                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
3693
3694         req_desc->SCSIIO.SMID = cpu_to_le16(index);
3695
3696         return req_desc;
3697 }
3698
3699 /**
3700  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
3701  * @instance:                   Adapter soft state
3702  * @cmd:                        mfi cmd pointer
3703  *
3704  */
3705 void
3706 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
3707                           struct megasas_cmd *cmd)
3708 {
3709         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
3710
3711         req_desc = build_mpt_cmd(instance, cmd);
3712
3713         megasas_fire_cmd_fusion(instance, req_desc);
3714         return;
3715 }
3716
3717 /**
3718  * megasas_release_fusion -     Reverses the FW initialization
3719  * @instance:                   Adapter soft state
3720  */
3721 void
3722 megasas_release_fusion(struct megasas_instance *instance)
3723 {
3724         megasas_free_ioc_init_cmd(instance);
3725         megasas_free_cmds(instance);
3726         megasas_free_cmds_fusion(instance);
3727
3728         iounmap(instance->reg_set);
3729
3730         pci_release_selected_regions(instance->pdev, 1<<instance->bar);
3731 }
3732
3733 /**
3734  * megasas_read_fw_status_reg_fusion - returns the current FW status value
3735  * @regs:                       MFI register set
3736  */
3737 static u32
3738 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
3739 {
3740         return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0);
3741 }
3742
3743 /**
3744  * megasas_alloc_host_crash_buffer -    Host buffers for Crash dump collection from Firmware
3745  * @instance:                           Controller's soft instance
3746  * return:                              Number of allocated host crash buffers
3747  */
3748 static void
3749 megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
3750 {
3751         unsigned int i;
3752
3753         for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
3754                 instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE);
3755                 if (!instance->crash_buf[i]) {
3756                         dev_info(&instance->pdev->dev, "Firmware crash dump "
3757                                 "memory allocation failed at index %d\n", i);
3758                         break;
3759                 }
3760         }
3761         instance->drv_buf_alloc = i;
3762 }
3763
3764 /**
3765  * megasas_free_host_crash_buffer -     Host buffers for Crash dump collection from Firmware
3766  * @instance:                           Controller's soft instance
3767  */
3768 void
3769 megasas_free_host_crash_buffer(struct megasas_instance *instance)
3770 {
3771         unsigned int i;
3772         for (i = 0; i < instance->drv_buf_alloc; i++) {
3773                 if (instance->crash_buf[i])
3774                         vfree(instance->crash_buf[i]);
3775         }
3776         instance->drv_buf_index = 0;
3777         instance->drv_buf_alloc = 0;
3778         instance->fw_crash_state = UNAVAILABLE;
3779         instance->fw_crash_buffer_size = 0;
3780 }
3781
3782 /**
3783  * megasas_adp_reset_fusion -   For controller reset
3784  * @regs:                               MFI register set
3785  */
3786 static int
3787 megasas_adp_reset_fusion(struct megasas_instance *instance,
3788                          struct megasas_register_set __iomem *regs)
3789 {
3790         u32 host_diag, abs_state, retry;
3791
3792         /* Now try to reset the chip */
3793         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3794         writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3795         writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3796         writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3797         writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3798         writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3799         writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
3800
3801         /* Check that the diag write enable (DRWE) bit is on */
3802         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
3803         retry = 0;
3804         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
3805                 msleep(100);
3806                 host_diag = megasas_readl(instance,
3807                                           &instance->reg_set->fusion_host_diag);
3808                 if (retry++ == 100) {
3809                         dev_warn(&instance->pdev->dev,
3810                                 "Host diag unlock failed from %s %d\n",
3811                                 __func__, __LINE__);
3812                         break;
3813                 }
3814         }
3815         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
3816                 return -1;
3817
3818         /* Send chip reset command */
3819         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
3820                 &instance->reg_set->fusion_host_diag);
3821         msleep(3000);
3822
3823         /* Make sure reset adapter bit is cleared */
3824         host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag);
3825         retry = 0;
3826         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
3827                 msleep(100);
3828                 host_diag = megasas_readl(instance,
3829                                           &instance->reg_set->fusion_host_diag);
3830                 if (retry++ == 1000) {
3831                         dev_warn(&instance->pdev->dev,
3832                                 "Diag reset adapter never cleared %s %d\n",
3833                                 __func__, __LINE__);
3834                         break;
3835                 }
3836         }
3837         if (host_diag & HOST_DIAG_RESET_ADAPTER)
3838                 return -1;
3839
3840         abs_state = instance->instancet->read_fw_status_reg(instance)
3841                         & MFI_STATE_MASK;
3842         retry = 0;
3843
3844         while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
3845                 msleep(100);
3846                 abs_state = instance->instancet->
3847                         read_fw_status_reg(instance) & MFI_STATE_MASK;
3848         }
3849         if (abs_state <= MFI_STATE_FW_INIT) {
3850                 dev_warn(&instance->pdev->dev,
3851                         "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
3852                         abs_state, __func__, __LINE__);
3853                 return -1;
3854         }
3855
3856         return 0;
3857 }
3858
3859 /**
3860  * megasas_check_reset_fusion - For controller reset check
3861  * @regs:                               MFI register set
3862  */
3863 static int
3864 megasas_check_reset_fusion(struct megasas_instance *instance,
3865                            struct megasas_register_set __iomem *regs)
3866 {
3867         return 0;
3868 }
3869
3870 /**
3871  * megasas_trigger_snap_dump -  Trigger snap dump in FW
3872  * @instance:                   Soft instance of adapter
3873  */
3874 static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
3875 {
3876         int j;
3877         u32 fw_state;
3878
3879         if (!instance->disableOnlineCtrlReset) {
3880                 dev_info(&instance->pdev->dev, "Trigger snap dump\n");
3881                 writel(MFI_ADP_TRIGGER_SNAP_DUMP,
3882                        &instance->reg_set->doorbell);
3883                 readl(&instance->reg_set->doorbell);
3884         }
3885
3886         for (j = 0; j < instance->snapdump_wait_time; j++) {
3887                 fw_state = instance->instancet->read_fw_status_reg(instance) &
3888                                 MFI_STATE_MASK;
3889                 if (fw_state == MFI_STATE_FAULT) {
3890                         dev_err(&instance->pdev->dev,
3891                                 "Found FW in FAULT state, after snap dump trigger\n");
3892                         return;
3893                 }
3894                 msleep(1000);
3895         }
3896 }
3897
3898 /* This function waits for outstanding commands on fusion to complete */
3899 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
3900                                         int reason, int *convert)
3901 {
3902         int i, outstanding, retval = 0, hb_seconds_missed = 0;
3903         u32 fw_state;
3904         u32 waittime_for_io_completion;
3905
3906         waittime_for_io_completion =
3907                 min_t(u32, resetwaittime,
3908                         (resetwaittime - instance->snapdump_wait_time));
3909
3910         if (reason == MFI_IO_TIMEOUT_OCR) {
3911                 dev_info(&instance->pdev->dev,
3912                         "MFI command is timed out\n");
3913                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3914                 if (instance->snapdump_wait_time)
3915                         megasas_trigger_snap_dump(instance);
3916                 retval = 1;
3917                 goto out;
3918         }
3919
3920         for (i = 0; i < waittime_for_io_completion; i++) {
3921                 /* Check if firmware is in fault state */
3922                 fw_state = instance->instancet->read_fw_status_reg(instance) &
3923                                 MFI_STATE_MASK;
3924                 if (fw_state == MFI_STATE_FAULT) {
3925                         dev_warn(&instance->pdev->dev, "Found FW in FAULT state,"
3926                                " will reset adapter scsi%d.\n",
3927                                 instance->host->host_no);
3928                         megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3929                         if (instance->requestorId && reason) {
3930                                 dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT"
3931                                 " state while polling during"
3932                                 " I/O timeout handling for %d\n",
3933                                 instance->host->host_no);
3934                                 *convert = 1;
3935                         }
3936
3937                         retval = 1;
3938                         goto out;
3939                 }
3940
3941
3942                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
3943                 if (instance->requestorId && !reason) {
3944                         retval = 1;
3945                         goto out;
3946                 }
3947
3948                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
3949                 if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) {
3950                         if (instance->hb_host_mem->HB.fwCounter !=
3951                             instance->hb_host_mem->HB.driverCounter) {
3952                                 instance->hb_host_mem->HB.driverCounter =
3953                                         instance->hb_host_mem->HB.fwCounter;
3954                                 hb_seconds_missed = 0;
3955                         } else {
3956                                 hb_seconds_missed++;
3957                                 if (hb_seconds_missed ==
3958                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
3959                                         dev_warn(&instance->pdev->dev, "SR-IOV:"
3960                                                " Heartbeat never completed "
3961                                                " while polling during I/O "
3962                                                " timeout handling for "
3963                                                "scsi%d.\n",
3964                                                instance->host->host_no);
3965                                                *convert = 1;
3966                                                retval = 1;
3967                                                goto out;
3968                                 }
3969                         }
3970                 }
3971
3972                 megasas_complete_cmd_dpc_fusion((unsigned long)instance);
3973                 outstanding = atomic_read(&instance->fw_outstanding);
3974                 if (!outstanding)
3975                         goto out;
3976
3977                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
3978                         dev_notice(&instance->pdev->dev, "[%2d]waiting for %d "
3979                                "commands to complete for scsi%d\n", i,
3980                                outstanding, instance->host->host_no);
3981                 }
3982                 msleep(1000);
3983         }
3984
3985         if (instance->snapdump_wait_time) {
3986                 megasas_trigger_snap_dump(instance);
3987                 retval = 1;
3988                 goto out;
3989         }
3990
3991         if (atomic_read(&instance->fw_outstanding)) {
3992                 dev_err(&instance->pdev->dev, "pending commands remain after waiting, "
3993                        "will reset adapter scsi%d.\n",
3994                        instance->host->host_no);
3995                 *convert = 1;
3996                 retval = 1;
3997         }
3998
3999 out:
4000         return retval;
4001 }
4002
4003 void  megasas_reset_reply_desc(struct megasas_instance *instance)
4004 {
4005         int i, j, count;
4006         struct fusion_context *fusion;
4007         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
4008
4009         fusion = instance->ctrl_context;
4010         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
4011         for (i = 0 ; i < count ; i++) {
4012                 fusion->last_reply_idx[i] = 0;
4013                 reply_desc = fusion->reply_frames_desc[i];
4014                 for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++)
4015                         reply_desc->Words = cpu_to_le64(ULLONG_MAX);
4016         }
4017 }
4018
4019 /*
4020  * megasas_refire_mgmt_cmd :    Re-fire management commands
4021  * @instance:                           Controller's soft instance
4022 */
4023 void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
4024 {
4025         int j;
4026         struct megasas_cmd_fusion *cmd_fusion;
4027         struct fusion_context *fusion;
4028         struct megasas_cmd *cmd_mfi;
4029         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4030         u16 smid;
4031         bool refire_cmd = 0;
4032         u8 result;
4033         u32 opcode = 0;
4034
4035         fusion = instance->ctrl_context;
4036
4037         /* Re-fire management commands.
4038          * Do not traverse complet MPT frame pool. Start from max_scsi_cmds.
4039          */
4040         for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) {
4041                 cmd_fusion = fusion->cmd_list[j];
4042                 cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
4043                 smid = le16_to_cpu(cmd_mfi->context.smid);
4044                 result = REFIRE_CMD;
4045
4046                 if (!smid)
4047                         continue;
4048
4049                 req_desc = megasas_get_request_descriptor(instance, smid - 1);
4050
4051                 switch (cmd_mfi->frame->hdr.cmd) {
4052                 case MFI_CMD_DCMD:
4053                         opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode);
4054                          /* Do not refire shutdown command */
4055                         if (opcode == MR_DCMD_CTRL_SHUTDOWN) {
4056                                 cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK;
4057                                 result = COMPLETE_CMD;
4058                                 break;
4059                         }
4060
4061                         refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) &&
4062                                       (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) &&
4063                                       !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
4064
4065                         if (!refire_cmd)
4066                                 result = RETURN_CMD;
4067
4068                         break;
4069                 case MFI_CMD_NVME:
4070                         if (!instance->support_nvme_passthru) {
4071                                 cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD;
4072                                 result = COMPLETE_CMD;
4073                         }
4074
4075                         break;
4076                 default:
4077                         break;
4078                 }
4079
4080                 switch (result) {
4081                 case REFIRE_CMD:
4082                         megasas_fire_cmd_fusion(instance, req_desc);
4083                         break;
4084                 case RETURN_CMD:
4085                         megasas_return_cmd(instance, cmd_mfi);
4086                         break;
4087                 case COMPLETE_CMD:
4088                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
4089                         break;
4090                 }
4091         }
4092 }
4093
4094 /*
4095  * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device
4096  * @instance: per adapter struct
4097  * @channel: the channel assigned by the OS
4098  * @id: the id assigned by the OS
4099  *
4100  * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED
4101  */
4102
4103 static int megasas_track_scsiio(struct megasas_instance *instance,
4104                 int id, int channel)
4105 {
4106         int i, found = 0;
4107         struct megasas_cmd_fusion *cmd_fusion;
4108         struct fusion_context *fusion;
4109         fusion = instance->ctrl_context;
4110
4111         for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4112                 cmd_fusion = fusion->cmd_list[i];
4113                 if (cmd_fusion->scmd &&
4114                         (cmd_fusion->scmd->device->id == id &&
4115                         cmd_fusion->scmd->device->channel == channel)) {
4116                         dev_info(&instance->pdev->dev,
4117                                 "SCSI commands pending to target"
4118                                 "channel %d id %d \tSMID: 0x%x\n",
4119                                 channel, id, cmd_fusion->index);
4120                         scsi_print_command(cmd_fusion->scmd);
4121                         found = 1;
4122                         break;
4123                 }
4124         }
4125
4126         return found ? FAILED : SUCCESS;
4127 }
4128
4129 /**
4130  * megasas_tm_response_code - translation of device response code
4131  * @ioc: per adapter object
4132  * @mpi_reply: MPI reply returned by firmware
4133  *
4134  * Return nothing.
4135  */
4136 static void
4137 megasas_tm_response_code(struct megasas_instance *instance,
4138                 struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply)
4139 {
4140         char *desc;
4141
4142         switch (mpi_reply->ResponseCode) {
4143         case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE:
4144                 desc = "task management request completed";
4145                 break;
4146         case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME:
4147                 desc = "invalid frame";
4148                 break;
4149         case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED:
4150                 desc = "task management request not supported";
4151                 break;
4152         case MPI2_SCSITASKMGMT_RSP_TM_FAILED:
4153                 desc = "task management request failed";
4154                 break;
4155         case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED:
4156                 desc = "task management request succeeded";
4157                 break;
4158         case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN:
4159                 desc = "invalid lun";
4160                 break;
4161         case 0xA:
4162                 desc = "overlapped tag attempted";
4163                 break;
4164         case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC:
4165                 desc = "task queued, however not sent to target";
4166                 break;
4167         default:
4168                 desc = "unknown";
4169                 break;
4170         }
4171         dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n",
4172                 mpi_reply->ResponseCode, desc);
4173         dev_dbg(&instance->pdev->dev,
4174                 "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo"
4175                 " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n",
4176                 mpi_reply->TerminationCount, mpi_reply->DevHandle,
4177                 mpi_reply->Function, mpi_reply->TaskType,
4178                 mpi_reply->IOCStatus, mpi_reply->IOCLogInfo);
4179 }
4180
4181 /**
4182  * megasas_issue_tm - main routine for sending tm requests
4183  * @instance: per adapter struct
4184  * @device_handle: device handle
4185  * @channel: the channel assigned by the OS
4186  * @id: the id assigned by the OS
4187  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c)
4188  * @smid_task: smid assigned to the task
4189  * @m_type: TM_MUTEX_ON or TM_MUTEX_OFF
4190  * Context: user
4191  *
4192  * MegaRaid use MPT interface for Task Magement request.
4193  * A generic API for sending task management requests to firmware.
4194  *
4195  * Return SUCCESS or FAILED.
4196  */
4197 static int
4198 megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
4199         uint channel, uint id, u16 smid_task, u8 type,
4200         struct MR_PRIV_DEVICE *mr_device_priv_data)
4201 {
4202         struct MR_TASK_MANAGE_REQUEST *mr_request;
4203         struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request;
4204         unsigned long timeleft;
4205         struct megasas_cmd_fusion *cmd_fusion;
4206         struct megasas_cmd *cmd_mfi;
4207         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
4208         struct fusion_context *fusion = NULL;
4209         struct megasas_cmd_fusion *scsi_lookup;
4210         int rc;
4211         int timeout = MEGASAS_DEFAULT_TM_TIMEOUT;
4212         struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply;
4213
4214         fusion = instance->ctrl_context;
4215
4216         cmd_mfi = megasas_get_cmd(instance);
4217
4218         if (!cmd_mfi) {
4219                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4220                         __func__, __LINE__);
4221                 return -ENOMEM;
4222         }
4223
4224         cmd_fusion = megasas_get_cmd_fusion(instance,
4225                         instance->max_scsi_cmds + cmd_mfi->index);
4226
4227         /*  Save the smid. To be used for returning the cmd */
4228         cmd_mfi->context.smid = cmd_fusion->index;
4229
4230         req_desc = megasas_get_request_descriptor(instance,
4231                         (cmd_fusion->index - 1));
4232
4233         cmd_fusion->request_desc = req_desc;
4234         req_desc->Words = 0;
4235
4236         mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request;
4237         memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST));
4238         mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest;
4239         mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
4240         mpi_request->DevHandle = cpu_to_le16(device_handle);
4241         mpi_request->TaskType = type;
4242         mpi_request->TaskMID = cpu_to_le16(smid_task);
4243         mpi_request->LUN[1] = 0;
4244
4245
4246         req_desc = cmd_fusion->request_desc;
4247         req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index);
4248         req_desc->HighPriority.RequestFlags =
4249                 (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
4250                 MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
4251         req_desc->HighPriority.MSIxIndex =  0;
4252         req_desc->HighPriority.LMID = 0;
4253         req_desc->HighPriority.Reserved1 = 0;
4254
4255         if (channel < MEGASAS_MAX_PD_CHANNELS)
4256                 mr_request->tmReqFlags.isTMForPD = 1;
4257         else
4258                 mr_request->tmReqFlags.isTMForLD = 1;
4259
4260         init_completion(&cmd_fusion->done);
4261         megasas_fire_cmd_fusion(instance, req_desc);
4262
4263         switch (type) {
4264         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4265                 timeout = mr_device_priv_data->task_abort_tmo;
4266                 break;
4267         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4268                 timeout = mr_device_priv_data->target_reset_tmo;
4269                 break;
4270         }
4271
4272         timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ);
4273
4274         if (!timeleft) {
4275                 dev_err(&instance->pdev->dev,
4276                         "task mgmt type 0x%x timed out\n", type);
4277                 cmd_mfi->flags |= DRV_DCMD_SKIP_REFIRE;
4278                 mutex_unlock(&instance->reset_mutex);
4279                 rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR);
4280                 mutex_lock(&instance->reset_mutex);
4281                 return rc;
4282         }
4283
4284         mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply;
4285         megasas_tm_response_code(instance, mpi_reply);
4286
4287         megasas_return_cmd(instance, cmd_mfi);
4288         rc = SUCCESS;
4289         switch (type) {
4290         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
4291                 scsi_lookup = fusion->cmd_list[smid_task - 1];
4292
4293                 if (scsi_lookup->scmd == NULL)
4294                         break;
4295                 else {
4296                         instance->instancet->disable_intr(instance);
4297                         megasas_sync_irqs((unsigned long)instance);
4298                         instance->instancet->enable_intr(instance);
4299                         if (scsi_lookup->scmd == NULL)
4300                                 break;
4301                 }
4302                 rc = FAILED;
4303                 break;
4304
4305         case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
4306                 if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF))
4307                         break;
4308                 instance->instancet->disable_intr(instance);
4309                 megasas_sync_irqs((unsigned long)instance);
4310                 rc = megasas_track_scsiio(instance, id, channel);
4311                 instance->instancet->enable_intr(instance);
4312
4313                 break;
4314         case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
4315         case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
4316                 break;
4317         default:
4318                 rc = FAILED;
4319                 break;
4320         }
4321
4322         return rc;
4323
4324 }
4325
4326 /*
4327  * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI
4328  * @instance: per adapter struct
4329  *
4330  * Return Non Zero index, if SMID found in outstanding commands
4331  */
4332 static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd)
4333 {
4334         int i, ret = 0;
4335         struct megasas_instance *instance;
4336         struct megasas_cmd_fusion *cmd_fusion;
4337         struct fusion_context *fusion;
4338
4339         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4340
4341         fusion = instance->ctrl_context;
4342
4343         for (i = 0; i < instance->max_scsi_cmds; i++) {
4344                 cmd_fusion = fusion->cmd_list[i];
4345                 if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) {
4346                         scmd_printk(KERN_NOTICE, scmd, "Abort request is for"
4347                                 " SMID: %d\n", cmd_fusion->index);
4348                         ret = cmd_fusion->index;
4349                         break;
4350                 }
4351         }
4352
4353         return ret;
4354 }
4355
4356 /*
4357 * megasas_get_tm_devhandle - Get devhandle for TM request
4358 * @sdev-                     OS provided scsi device
4359 *
4360 * Returns-                   devhandle/targetID of SCSI device
4361 */
4362 static u16 megasas_get_tm_devhandle(struct scsi_device *sdev)
4363 {
4364         u16 pd_index = 0;
4365         u32 device_id;
4366         struct megasas_instance *instance;
4367         struct fusion_context *fusion;
4368         struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
4369         u16 devhandle = (u16)ULONG_MAX;
4370
4371         instance = (struct megasas_instance *)sdev->host->hostdata;
4372         fusion = instance->ctrl_context;
4373
4374         if (!MEGASAS_IS_LOGICAL(sdev)) {
4375                 if (instance->use_seqnum_jbod_fp) {
4376                         pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
4377                                     + sdev->id;
4378                         pd_sync = (void *)fusion->pd_seq_sync
4379                                         [(instance->pd_seq_map_id - 1) & 1];
4380                         devhandle = pd_sync->seq[pd_index].devHandle;
4381                 } else
4382                         sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable"
4383                                 " without JBOD MAP support from %s %d\n", __func__, __LINE__);
4384         } else {
4385                 device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
4386                                 + sdev->id;
4387                 devhandle = device_id;
4388         }
4389
4390         return devhandle;
4391 }
4392
4393 /*
4394  * megasas_task_abort_fusion : SCSI task abort function for fusion adapters
4395  * @scmd : pointer to scsi command object
4396  *
4397  * Return SUCCESS, if command aborted else FAILED
4398  */
4399
4400 int megasas_task_abort_fusion(struct scsi_cmnd *scmd)
4401 {
4402         struct megasas_instance *instance;
4403         u16 smid, devhandle;
4404         struct fusion_context *fusion;
4405         int ret;
4406         struct MR_PRIV_DEVICE *mr_device_priv_data;
4407         mr_device_priv_data = scmd->device->hostdata;
4408
4409
4410         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4411         fusion = instance->ctrl_context;
4412
4413         scmd_printk(KERN_INFO, scmd, "task abort called for scmd(%p)\n", scmd);
4414         scsi_print_command(scmd);
4415
4416         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4417                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4418                 "SCSI host:%d\n", instance->host->host_no);
4419                 ret = FAILED;
4420                 return ret;
4421         }
4422
4423         if (!mr_device_priv_data) {
4424                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4425                         "scmd(%p)\n", scmd);
4426                 scmd->result = DID_NO_CONNECT << 16;
4427                 ret = SUCCESS;
4428                 goto out;
4429         }
4430
4431
4432         if (!mr_device_priv_data->is_tm_capable) {
4433                 ret = FAILED;
4434                 goto out;
4435         }
4436
4437         mutex_lock(&instance->reset_mutex);
4438
4439         smid = megasas_fusion_smid_lookup(scmd);
4440
4441         if (!smid) {
4442                 ret = SUCCESS;
4443                 scmd_printk(KERN_NOTICE, scmd, "Command for which abort is"
4444                         " issued is not found in oustanding commands\n");
4445                 mutex_unlock(&instance->reset_mutex);
4446                 goto out;
4447         }
4448
4449         devhandle = megasas_get_tm_devhandle(scmd->device);
4450
4451         if (devhandle == (u16)ULONG_MAX) {
4452                 ret = SUCCESS;
4453                 sdev_printk(KERN_INFO, scmd->device,
4454                         "task abort issued for invalid devhandle\n");
4455                 mutex_unlock(&instance->reset_mutex);
4456                 goto out;
4457         }
4458         sdev_printk(KERN_INFO, scmd->device,
4459                 "attempting task abort! scmd(%p) tm_dev_handle 0x%x\n",
4460                 scmd, devhandle);
4461
4462         mr_device_priv_data->tm_busy = 1;
4463         ret = megasas_issue_tm(instance, devhandle,
4464                         scmd->device->channel, scmd->device->id, smid,
4465                         MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK,
4466                         mr_device_priv_data);
4467         mr_device_priv_data->tm_busy = 0;
4468
4469         mutex_unlock(&instance->reset_mutex);
4470 out:
4471         sdev_printk(KERN_INFO, scmd->device, "task abort: %s scmd(%p)\n",
4472                         ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
4473
4474         return ret;
4475 }
4476
4477 /*
4478  * megasas_reset_target_fusion : target reset function for fusion adapters
4479  * scmd: SCSI command pointer
4480  *
4481  * Returns SUCCESS if all commands associated with target aborted else FAILED
4482  */
4483
4484 int megasas_reset_target_fusion(struct scsi_cmnd *scmd)
4485 {
4486
4487         struct megasas_instance *instance;
4488         int ret = FAILED;
4489         u16 devhandle;
4490         struct fusion_context *fusion;
4491         struct MR_PRIV_DEVICE *mr_device_priv_data;
4492         mr_device_priv_data = scmd->device->hostdata;
4493
4494         instance = (struct megasas_instance *)scmd->device->host->hostdata;
4495         fusion = instance->ctrl_context;
4496
4497         sdev_printk(KERN_INFO, scmd->device,
4498                     "target reset called for scmd(%p)\n", scmd);
4499
4500         if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) {
4501                 dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL,"
4502                 "SCSI host:%d\n", instance->host->host_no);
4503                 ret = FAILED;
4504                 return ret;
4505         }
4506
4507         if (!mr_device_priv_data) {
4508                 sdev_printk(KERN_INFO, scmd->device, "device been deleted! "
4509                         "scmd(%p)\n", scmd);
4510                 scmd->result = DID_NO_CONNECT << 16;
4511                 ret = SUCCESS;
4512                 goto out;
4513         }
4514
4515
4516         if (!mr_device_priv_data->is_tm_capable) {
4517                 ret = FAILED;
4518                 goto out;
4519         }
4520
4521         mutex_lock(&instance->reset_mutex);
4522         devhandle = megasas_get_tm_devhandle(scmd->device);
4523
4524         if (devhandle == (u16)ULONG_MAX) {
4525                 ret = SUCCESS;
4526                 sdev_printk(KERN_INFO, scmd->device,
4527                         "target reset issued for invalid devhandle\n");
4528                 mutex_unlock(&instance->reset_mutex);
4529                 goto out;
4530         }
4531
4532         sdev_printk(KERN_INFO, scmd->device,
4533                 "attempting target reset! scmd(%p) tm_dev_handle 0x%x\n",
4534                 scmd, devhandle);
4535         mr_device_priv_data->tm_busy = 1;
4536         ret = megasas_issue_tm(instance, devhandle,
4537                         scmd->device->channel, scmd->device->id, 0,
4538                         MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
4539                         mr_device_priv_data);
4540         mr_device_priv_data->tm_busy = 0;
4541         mutex_unlock(&instance->reset_mutex);
4542 out:
4543         scmd_printk(KERN_NOTICE, scmd, "megasas: target reset %s!!\n",
4544                 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
4545
4546         return ret;
4547 }
4548
4549 /*SRIOV get other instance in cluster if any*/
4550 struct megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance)
4551 {
4552         int i;
4553
4554         for (i = 0; i < MAX_MGMT_ADAPTERS; i++) {
4555                 if (megasas_mgmt_info.instance[i] &&
4556                         (megasas_mgmt_info.instance[i] != instance) &&
4557                          megasas_mgmt_info.instance[i]->requestorId &&
4558                          megasas_mgmt_info.instance[i]->peerIsPresent &&
4559                         (memcmp((megasas_mgmt_info.instance[i]->clusterId),
4560                         instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0))
4561                         return megasas_mgmt_info.instance[i];
4562         }
4563         return NULL;
4564 }
4565
4566 /* Check for a second path that is currently UP */
4567 int megasas_check_mpio_paths(struct megasas_instance *instance,
4568         struct scsi_cmnd *scmd)
4569 {
4570         struct megasas_instance *peer_instance = NULL;
4571         int retval = (DID_REQUEUE << 16);
4572
4573         if (instance->peerIsPresent) {
4574                 peer_instance = megasas_get_peer_instance(instance);
4575                 if ((peer_instance) &&
4576                         (atomic_read(&peer_instance->adprecovery) ==
4577                         MEGASAS_HBA_OPERATIONAL))
4578                         retval = (DID_NO_CONNECT << 16);
4579         }
4580         return retval;
4581 }
4582
4583 /* Core fusion reset function */
4584 int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
4585 {
4586         int retval = SUCCESS, i, j, convert = 0;
4587         struct megasas_instance *instance;
4588         struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
4589         struct fusion_context *fusion;
4590         u32 abs_state, status_reg, reset_adapter;
4591         u32 io_timeout_in_crash_mode = 0;
4592         struct scsi_cmnd *scmd_local = NULL;
4593         struct scsi_device *sdev;
4594         int ret_target_prop = DCMD_FAILED;
4595         bool is_target_prop = false;
4596
4597         instance = (struct megasas_instance *)shost->hostdata;
4598         fusion = instance->ctrl_context;
4599
4600         mutex_lock(&instance->reset_mutex);
4601
4602         if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
4603                 dev_warn(&instance->pdev->dev, "Hardware critical error, "
4604                        "returning FAILED for scsi%d.\n",
4605                         instance->host->host_no);
4606                 mutex_unlock(&instance->reset_mutex);
4607                 return FAILED;
4608         }
4609         status_reg = instance->instancet->read_fw_status_reg(instance);
4610         abs_state = status_reg & MFI_STATE_MASK;
4611
4612         /* IO timeout detected, forcibly put FW in FAULT state */
4613         if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
4614                 instance->crash_dump_app_support && reason) {
4615                 dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, "
4616                         "forcibly FAULT Firmware\n");
4617                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4618                 status_reg = megasas_readl(instance, &instance->reg_set->doorbell);
4619                 writel(status_reg | MFI_STATE_FORCE_OCR,
4620                         &instance->reg_set->doorbell);
4621                 readl(&instance->reg_set->doorbell);
4622                 mutex_unlock(&instance->reset_mutex);
4623                 do {
4624                         ssleep(3);
4625                         io_timeout_in_crash_mode++;
4626                         dev_dbg(&instance->pdev->dev, "waiting for [%d] "
4627                                 "seconds for crash dump collection and OCR "
4628                                 "to be done\n", (io_timeout_in_crash_mode * 3));
4629                 } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) &&
4630                         (io_timeout_in_crash_mode < 80));
4631
4632                 if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) {
4633                         dev_info(&instance->pdev->dev, "OCR done for IO "
4634                                 "timeout case\n");
4635                         retval = SUCCESS;
4636                 } else {
4637                         dev_info(&instance->pdev->dev, "Controller is not "
4638                                 "operational after 240 seconds wait for IO "
4639                                 "timeout case in FW crash dump mode\n do "
4640                                 "OCR/kill adapter\n");
4641                         retval = megasas_reset_fusion(shost, 0);
4642                 }
4643                 return retval;
4644         }
4645
4646         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
4647                 del_timer_sync(&instance->sriov_heartbeat_timer);
4648         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4649         atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING);
4650         instance->instancet->disable_intr(instance);
4651         megasas_sync_irqs((unsigned long)instance);
4652
4653         /* First try waiting for commands to complete */
4654         if (megasas_wait_for_outstanding_fusion(instance, reason,
4655                                                 &convert)) {
4656                 atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT);
4657                 dev_warn(&instance->pdev->dev, "resetting fusion "
4658                        "adapter scsi%d.\n", instance->host->host_no);
4659                 if (convert)
4660                         reason = 0;
4661
4662                 if (megasas_dbg_lvl & OCR_LOGS)
4663                         dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n");
4664
4665                 /* Now return commands back to the OS */
4666                 for (i = 0 ; i < instance->max_scsi_cmds; i++) {
4667                         cmd_fusion = fusion->cmd_list[i];
4668                         /*check for extra commands issued by driver*/
4669                         if (instance->adapter_type >= VENTURA_SERIES) {
4670                                 r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
4671                                 megasas_return_cmd_fusion(instance, r1_cmd);
4672                         }
4673                         scmd_local = cmd_fusion->scmd;
4674                         if (cmd_fusion->scmd) {
4675                                 if (megasas_dbg_lvl & OCR_LOGS) {
4676                                         sdev_printk(KERN_INFO,
4677                                                 cmd_fusion->scmd->device, "SMID: 0x%x\n",
4678                                                 cmd_fusion->index);
4679                                         scsi_print_command(cmd_fusion->scmd);
4680                                 }
4681
4682                                 scmd_local->result =
4683                                         megasas_check_mpio_paths(instance,
4684                                                         scmd_local);
4685                                 if (instance->ldio_threshold &&
4686                                         megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
4687                                         atomic_dec(&instance->ldio_outstanding);
4688                                 megasas_return_cmd_fusion(instance, cmd_fusion);
4689                                 scsi_dma_unmap(scmd_local);
4690                                 scmd_local->scsi_done(scmd_local);
4691                         }
4692                 }
4693
4694                 atomic_set(&instance->fw_outstanding, 0);
4695
4696                 status_reg = instance->instancet->read_fw_status_reg(instance);
4697                 abs_state = status_reg & MFI_STATE_MASK;
4698                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
4699                 if (instance->disableOnlineCtrlReset ||
4700                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
4701                         /* Reset not supported, kill adapter */
4702                         dev_warn(&instance->pdev->dev, "Reset not supported"
4703                                ", killing adapter scsi%d.\n",
4704                                 instance->host->host_no);
4705                         megaraid_sas_kill_hba(instance);
4706                         instance->skip_heartbeat_timer_del = 1;
4707                         retval = FAILED;
4708                         goto out;
4709                 }
4710
4711                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
4712                 if (instance->requestorId && !reason) {
4713                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
4714                         goto transition_to_ready;
4715                 }
4716
4717                 /* Now try to reset the chip */
4718                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
4719
4720                         if (instance->instancet->adp_reset
4721                                 (instance, instance->reg_set))
4722                                 continue;
4723 transition_to_ready:
4724                         /* Wait for FW to become ready */
4725                         if (megasas_transition_to_ready(instance, 1)) {
4726                                 dev_warn(&instance->pdev->dev,
4727                                         "Failed to transition controller to ready for "
4728                                         "scsi%d.\n", instance->host->host_no);
4729                                 if (instance->requestorId && !reason)
4730                                         goto fail_kill_adapter;
4731                                 else
4732                                         continue;
4733                         }
4734                         megasas_reset_reply_desc(instance);
4735                         megasas_fusion_update_can_queue(instance, OCR_CONTEXT);
4736
4737                         if (megasas_ioc_init_fusion(instance)) {
4738                                 if (instance->requestorId && !reason)
4739                                         goto fail_kill_adapter;
4740                                 else
4741                                         continue;
4742                         }
4743
4744                         if (megasas_get_ctrl_info(instance)) {
4745                                 dev_info(&instance->pdev->dev,
4746                                         "Failed from %s %d\n",
4747                                         __func__, __LINE__);
4748                                 megaraid_sas_kill_hba(instance);
4749                                 retval = FAILED;
4750                                 goto out;
4751                         }
4752
4753                         megasas_refire_mgmt_cmd(instance);
4754
4755                         /* Reset load balance info */
4756                         if (fusion->load_balance_info)
4757                                 memset(fusion->load_balance_info, 0,
4758                                        (sizeof(struct LD_LOAD_BALANCE_INFO) *
4759                                        MAX_LOGICAL_DRIVES_EXT));
4760
4761                         if (!megasas_get_map_info(instance))
4762                                 megasas_sync_map_info(instance);
4763
4764                         megasas_setup_jbod_map(instance);
4765
4766                         /* reset stream detection array */
4767                         if (instance->adapter_type >= VENTURA_SERIES) {
4768                                 for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) {
4769                                         memset(fusion->stream_detect_by_ld[j],
4770                                         0, sizeof(struct LD_STREAM_DETECT));
4771                                  fusion->stream_detect_by_ld[j]->mru_bit_map
4772                                                 = MR_STREAM_BITMAP;
4773                                 }
4774                         }
4775
4776                         clear_bit(MEGASAS_FUSION_IN_RESET,
4777                                   &instance->reset_flags);
4778                         instance->instancet->enable_intr(instance);
4779
4780                         shost_for_each_device(sdev, shost) {
4781                                 if ((instance->tgt_prop) &&
4782                                     (instance->nvme_page_size))
4783                                         ret_target_prop = megasas_get_target_prop(instance, sdev);
4784
4785                                 is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false;
4786                                 megasas_set_dynamic_target_properties(sdev, is_target_prop);
4787                         }
4788
4789                         atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
4790
4791                         dev_info(&instance->pdev->dev, "Interrupts are enabled and"
4792                                 " controller is OPERATIONAL for scsi:%d\n",
4793                                 instance->host->host_no);
4794
4795                         /* Restart SR-IOV heartbeat */
4796                         if (instance->requestorId) {
4797                                 if (!megasas_sriov_start_heartbeat(instance, 0))
4798                                         megasas_start_timer(instance);
4799                                 else
4800                                         instance->skip_heartbeat_timer_del = 1;
4801                         }
4802
4803                         if (instance->crash_dump_drv_support &&
4804                                 instance->crash_dump_app_support)
4805                                 megasas_set_crash_dump_params(instance,
4806                                         MR_CRASH_BUF_TURN_ON);
4807                         else
4808                                 megasas_set_crash_dump_params(instance,
4809                                         MR_CRASH_BUF_TURN_OFF);
4810
4811                         if (instance->snapdump_wait_time) {
4812                                 megasas_get_snapdump_properties(instance);
4813                                 dev_info(&instance->pdev->dev,
4814                                          "Snap dump wait time\t: %d\n",
4815                                          instance->snapdump_wait_time);
4816                         }
4817
4818                         retval = SUCCESS;
4819
4820                         /* Adapter reset completed successfully */
4821                         dev_warn(&instance->pdev->dev,
4822                                  "Reset successful for scsi%d.\n",
4823                                  instance->host->host_no);
4824
4825                         goto out;
4826                 }
4827 fail_kill_adapter:
4828                 /* Reset failed, kill the adapter */
4829                 dev_warn(&instance->pdev->dev, "Reset failed, killing "
4830                        "adapter scsi%d.\n", instance->host->host_no);
4831                 megaraid_sas_kill_hba(instance);
4832                 instance->skip_heartbeat_timer_del = 1;
4833                 retval = FAILED;
4834         } else {
4835                 /* For VF: Restart HB timer if we didn't OCR */
4836                 if (instance->requestorId) {
4837                         megasas_start_timer(instance);
4838                 }
4839                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4840                 instance->instancet->enable_intr(instance);
4841                 atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL);
4842         }
4843 out:
4844         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
4845         mutex_unlock(&instance->reset_mutex);
4846         return retval;
4847 }
4848
4849 /* Fusion Crash dump collection */
4850 void  megasas_fusion_crash_dump(struct megasas_instance *instance)
4851 {
4852         u32 status_reg;
4853         u8 partial_copy = 0;
4854         int wait = 0;
4855
4856
4857         status_reg = instance->instancet->read_fw_status_reg(instance);
4858
4859         /*
4860          * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
4861          * to host crash buffers
4862          */
4863         if (instance->drv_buf_index == 0) {
4864                 /* Buffer is already allocated for old Crash dump.
4865                  * Do OCR and do not wait for crash dump collection
4866                  */
4867                 if (instance->drv_buf_alloc) {
4868                         dev_info(&instance->pdev->dev, "earlier crash dump is "
4869                                 "not yet copied by application, ignoring this "
4870                                 "crash dump and initiating OCR\n");
4871                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
4872                         writel(status_reg,
4873                                 &instance->reg_set->outbound_scratch_pad_0);
4874                         readl(&instance->reg_set->outbound_scratch_pad_0);
4875                         return;
4876                 }
4877                 megasas_alloc_host_crash_buffer(instance);
4878                 dev_info(&instance->pdev->dev, "Number of host crash buffers "
4879                         "allocated: %d\n", instance->drv_buf_alloc);
4880         }
4881
4882         while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) &&
4883                (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) {
4884                 if (!(status_reg & MFI_STATE_DMADONE)) {
4885                         /*
4886                          * Next crash dump buffer is not yet DMA'd by FW
4887                          * Check after 10ms. Wait for 1 second for FW to
4888                          * post the next buffer. If not bail out.
4889                          */
4890                         wait++;
4891                         msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
4892                         status_reg = instance->instancet->read_fw_status_reg(
4893                                         instance);
4894                         continue;
4895                 }
4896
4897                 wait = 0;
4898                 if (instance->drv_buf_index >= instance->drv_buf_alloc) {
4899                         dev_info(&instance->pdev->dev,
4900                                  "Driver is done copying the buffer: %d\n",
4901                                  instance->drv_buf_alloc);
4902                         status_reg |= MFI_STATE_CRASH_DUMP_DONE;
4903                         partial_copy = 1;
4904                         break;
4905                 } else {
4906                         memcpy(instance->crash_buf[instance->drv_buf_index],
4907                                instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
4908                         instance->drv_buf_index++;
4909                         status_reg &= ~MFI_STATE_DMADONE;
4910                 }
4911
4912                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
4913                 readl(&instance->reg_set->outbound_scratch_pad_0);
4914
4915                 msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
4916                 status_reg = instance->instancet->read_fw_status_reg(instance);
4917         }
4918
4919         if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
4920                 dev_info(&instance->pdev->dev, "Crash Dump is available,number "
4921                         "of copied buffers: %d\n", instance->drv_buf_index);
4922                 instance->fw_crash_buffer_size =  instance->drv_buf_index;
4923                 instance->fw_crash_state = AVAILABLE;
4924                 instance->drv_buf_index = 0;
4925                 writel(status_reg, &instance->reg_set->outbound_scratch_pad_0);
4926                 readl(&instance->reg_set->outbound_scratch_pad_0);
4927                 if (!partial_copy)
4928                         megasas_reset_fusion(instance->host, 0);
4929         }
4930 }
4931
4932
4933 /* Fusion OCR work queue */
4934 void megasas_fusion_ocr_wq(struct work_struct *work)
4935 {
4936         struct megasas_instance *instance =
4937                 container_of(work, struct megasas_instance, work_init);
4938
4939         megasas_reset_fusion(instance->host, 0);
4940 }
4941
4942 /* Allocate fusion context */
4943 int
4944 megasas_alloc_fusion_context(struct megasas_instance *instance)
4945 {
4946         struct fusion_context *fusion;
4947
4948         instance->ctrl_context = kzalloc(sizeof(struct fusion_context),
4949                                          GFP_KERNEL);
4950         if (!instance->ctrl_context) {
4951                 dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4952                         __func__, __LINE__);
4953                 return -ENOMEM;
4954         }
4955
4956         fusion = instance->ctrl_context;
4957
4958         fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
4959                                               sizeof(LD_SPAN_INFO));
4960         fusion->log_to_span =
4961                 (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
4962                                                 fusion->log_to_span_pages);
4963         if (!fusion->log_to_span) {
4964                 fusion->log_to_span =
4965                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
4966                                            sizeof(LD_SPAN_INFO)));
4967                 if (!fusion->log_to_span) {
4968                         dev_err(&instance->pdev->dev, "Failed from %s %d\n",
4969                                 __func__, __LINE__);
4970                         return -ENOMEM;
4971                 }
4972         }
4973
4974         fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT *
4975                 sizeof(struct LD_LOAD_BALANCE_INFO));
4976         fusion->load_balance_info =
4977                 (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
4978                 fusion->load_balance_info_pages);
4979         if (!fusion->load_balance_info) {
4980                 fusion->load_balance_info =
4981                         vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT,
4982                                            sizeof(struct LD_LOAD_BALANCE_INFO)));
4983                 if (!fusion->load_balance_info)
4984                         dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, "
4985                                 "continuing without Load Balance support\n");
4986         }
4987
4988         return 0;
4989 }
4990
4991 void
4992 megasas_free_fusion_context(struct megasas_instance *instance)
4993 {
4994         struct fusion_context *fusion = instance->ctrl_context;
4995
4996         if (fusion) {
4997                 if (fusion->load_balance_info) {
4998                         if (is_vmalloc_addr(fusion->load_balance_info))
4999                                 vfree(fusion->load_balance_info);
5000                         else
5001                                 free_pages((ulong)fusion->load_balance_info,
5002                                         fusion->load_balance_info_pages);
5003                 }
5004
5005                 if (fusion->log_to_span) {
5006                         if (is_vmalloc_addr(fusion->log_to_span))
5007                                 vfree(fusion->log_to_span);
5008                         else
5009                                 free_pages((ulong)fusion->log_to_span,
5010                                            fusion->log_to_span_pages);
5011                 }
5012
5013                 kfree(fusion);
5014         }
5015 }
5016
5017 struct megasas_instance_template megasas_instance_template_fusion = {
5018         .enable_intr = megasas_enable_intr_fusion,
5019         .disable_intr = megasas_disable_intr_fusion,
5020         .clear_intr = megasas_clear_intr_fusion,
5021         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
5022         .adp_reset = megasas_adp_reset_fusion,
5023         .check_reset = megasas_check_reset_fusion,
5024         .service_isr = megasas_isr_fusion,
5025         .tasklet = megasas_complete_cmd_dpc_fusion,
5026         .init_adapter = megasas_init_adapter_fusion,
5027         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
5028         .issue_dcmd = megasas_issue_dcmd_fusion,
5029 };