drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2012  LSI Corporation.
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version 2
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  *  FILE: megaraid_sas_fusion.c
  21  *
  22  *  Authors: LSI Corporation
  23  *           Sumant Patro
  24  *           Adam Radford <linuxraid@lsi.com>
  25  *
  26  *  Send feedback to: <megaraidlinux@lsi.com>
  27  *
  28  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
  29  *     ATTN: Linuxraid
  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
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51 #include <scsi/scsi_device.h>
  52 #include <scsi/scsi_host.h>
  53
  54 #include "megaraid_sas_fusion.h"
  55 #include "megaraid_sas.h"
  56
  57 extern void megasas_free_cmds(struct megasas_instance *instance);
  58 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  59                                            *instance);
  60 extern void
  61 megasas_complete_cmd(struct megasas_instance *instance,
  62                      struct megasas_cmd *cmd, u8 alt_status);
  63 int megasas_is_ldio(struct scsi_cmnd *cmd);
  64 int
  65 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
  66               int seconds);
  67
  68 void
  69 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  70 int megasas_alloc_cmds(struct megasas_instance *instance);
  71 int
  72 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
  73 int
  74 megasas_issue_polled(struct megasas_instance *instance,
  75                      struct megasas_cmd *cmd);
  76 void
  77 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  78
  79 u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
  80                            struct IO_REQUEST_INFO *in_info);
  81 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
  82 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  83
  84 extern u32 megasas_dbg_lvl;
  85 void megasas_sriov_heartbeat_handler(unsigned long instance_addr);
  86 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
  87                                   int initial);
  88 void megasas_start_timer(struct megasas_instance *instance,
  89                         struct timer_list *timer,
  90                          void *fn, unsigned long interval);
  91 extern struct megasas_mgmt_info megasas_mgmt_info;
  92 extern int resetwaittime;
  93
  94 /**
  95  * megasas_enable_intr_fusion - Enables interrupts
  96  * @regs:                       MFI register set
  97  */
  98 void
  99 megasas_enable_intr_fusion(struct megasas_instance *instance)
 100 {
 101         struct megasas_register_set __iomem *regs;
 102         regs = instance->reg_set;
 103         /* For Thunderbolt/Invader also clear intr on enable */
 104         writel(~0, &regs->outbound_intr_status);
 105         readl(&regs->outbound_intr_status);
 106
 107         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 108
 109         /* Dummy readl to force pci flush */
 110         readl(&regs->outbound_intr_mask);
 111         instance->mask_interrupts = 0;
 112 }
 113
 114 /**
 115  * megasas_disable_intr_fusion - Disables interrupt
 116  * @regs:                        MFI register set
 117  */
 118 void
 119 megasas_disable_intr_fusion(struct megasas_instance *instance)
 120 {
 121         u32 mask = 0xFFFFFFFF;
 122         u32 status;
 123         struct megasas_register_set __iomem *regs;
 124         regs = instance->reg_set;
 125         instance->mask_interrupts = 1;
 126
 127         writel(mask, &regs->outbound_intr_mask);
 128         /* Dummy readl to force pci flush */
 129         status = readl(&regs->outbound_intr_mask);
 130 }
 131
 132 int
 133 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 134 {
 135         u32 status;
 136         /*
 137          * Check if it is our interrupt
 138          */
 139         status = readl(&regs->outbound_intr_status);
 140
 141         if (status & 1) {
 142                 writel(status, &regs->outbound_intr_status);
 143                 readl(&regs->outbound_intr_status);
 144                 return 1;
 145         }
 146         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 147                 return 0;
 148
 149         return 1;
 150 }
 151
 152 /**
 153  * megasas_get_cmd_fusion -     Get a command from the free pool
 154  * @instance:           Adapter soft state
 155  *
 156  * Returns a free command from the pool
 157  */
 158 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 159                                                   *instance)
 160 {
 161         unsigned long flags;
 162         struct fusion_context *fusion =
 163                 (struct fusion_context *)instance->ctrl_context;
 164         struct megasas_cmd_fusion *cmd = NULL;
 165
 166         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 167
 168         if (!list_empty(&fusion->cmd_pool)) {
 169                 cmd = list_entry((&fusion->cmd_pool)->next,
 170                                  struct megasas_cmd_fusion, list);
 171                 list_del_init(&cmd->list);
 172         } else {
 173                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 174         }
 175
 176         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 177         return cmd;
 178 }
 179
 180 /**
 181  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 182  * @instance:           Adapter soft state
 183  * @cmd:                Command packet to be returned to free command pool
 184  */
 185 static inline void
 186 megasas_return_cmd_fusion(struct megasas_instance *instance,
 187                           struct megasas_cmd_fusion *cmd)
 188 {
 189         unsigned long flags;
 190         struct fusion_context *fusion =
 191                 (struct fusion_context *)instance->ctrl_context;
 192
 193         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 194
 195         cmd->scmd = NULL;
 196         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 197         list_add_tail(&cmd->list, &fusion->cmd_pool);
 198
 199         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 200 }
 201
 202 /**
 203  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 204  * @instance:                           Adapter soft state
 205  */
 206 static void megasas_teardown_frame_pool_fusion(
 207         struct megasas_instance *instance)
 208 {
 209         int i;
 210         struct fusion_context *fusion = instance->ctrl_context;
 211
 212         u16 max_cmd = instance->max_fw_cmds;
 213
 214         struct megasas_cmd_fusion *cmd;
 215
 216         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 217                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 218                        "sense pool : %p\n", fusion->sg_dma_pool,
 219                        fusion->sense_dma_pool);
 220                 return;
 221         }
 222
 223         /*
 224          * Return all frames to pool
 225          */
 226         for (i = 0; i < max_cmd; i++) {
 227
 228                 cmd = fusion->cmd_list[i];
 229
 230                 if (cmd->sg_frame)
 231                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 232                                       cmd->sg_frame_phys_addr);
 233
 234                 if (cmd->sense)
 235                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 236                                       cmd->sense_phys_addr);
 237         }
 238
 239         /*
 240          * Now destroy the pool itself
 241          */
 242         pci_pool_destroy(fusion->sg_dma_pool);
 243         pci_pool_destroy(fusion->sense_dma_pool);
 244
 245         fusion->sg_dma_pool = NULL;
 246         fusion->sense_dma_pool = NULL;
 247 }
 248
 249 /**
 250  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 251  * @instance:           Adapter soft state
 252  */
 253 void
 254 megasas_free_cmds_fusion(struct megasas_instance *instance)
 255 {
 256         int i;
 257         struct fusion_context *fusion = instance->ctrl_context;
 258
 259         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 260
 261
 262         req_sz = fusion->request_alloc_sz;
 263         reply_sz = fusion->reply_alloc_sz;
 264         io_frames_sz = fusion->io_frames_alloc_sz;
 265
 266         max_cmds = instance->max_fw_cmds;
 267
 268         /* Free descriptors and request Frames memory */
 269         if (fusion->req_frames_desc)
 270                 dma_free_coherent(&instance->pdev->dev, req_sz,
 271                                   fusion->req_frames_desc,
 272                                   fusion->req_frames_desc_phys);
 273
 274         if (fusion->reply_frames_desc) {
 275                 pci_pool_free(fusion->reply_frames_desc_pool,
 276                               fusion->reply_frames_desc,
 277                               fusion->reply_frames_desc_phys);
 278                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 279         }
 280
 281         if (fusion->io_request_frames) {
 282                 pci_pool_free(fusion->io_request_frames_pool,
 283                               fusion->io_request_frames,
 284                               fusion->io_request_frames_phys);
 285                 pci_pool_destroy(fusion->io_request_frames_pool);
 286         }
 287
 288         /* Free the Fusion frame pool */
 289         megasas_teardown_frame_pool_fusion(instance);
 290
 291         /* Free all the commands in the cmd_list */
 292         for (i = 0; i < max_cmds; i++)
 293                 kfree(fusion->cmd_list[i]);
 294
 295         /* Free the cmd_list buffer itself */
 296         kfree(fusion->cmd_list);
 297         fusion->cmd_list = NULL;
 298
 299         INIT_LIST_HEAD(&fusion->cmd_pool);
 300 }
 301
 302 /**
 303  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 304  * @instance:                   Adapter soft state
 305  *
 306  */
 307 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 308 {
 309         int i;
 310         u32 max_cmd;
 311         struct fusion_context *fusion;
 312         struct megasas_cmd_fusion *cmd;
 313         u32 total_sz_chain_frame;
 314
 315         fusion = instance->ctrl_context;
 316         max_cmd = instance->max_fw_cmds;
 317
 318         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 319
 320         /*
 321          * Use DMA pool facility provided by PCI layer
 322          */
 323
 324         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 325                                               instance->pdev,
 326                                               total_sz_chain_frame, 4,
 327                                               0);
 328         if (!fusion->sg_dma_pool) {
 329                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 330                        "fusion\n");
 331                 return -ENOMEM;
 332         }
 333         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 334                                                  instance->pdev,
 335                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 336
 337         if (!fusion->sense_dma_pool) {
 338                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 339                        "fusion\n");
 340                 pci_pool_destroy(fusion->sg_dma_pool);
 341                 fusion->sg_dma_pool = NULL;
 342                 return -ENOMEM;
 343         }
 344
 345         /*
 346          * Allocate and attach a frame to each of the commands in cmd_list
 347          */
 348         for (i = 0; i < max_cmd; i++) {
 349
 350                 cmd = fusion->cmd_list[i];
 351
 352                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 353                                                GFP_KERNEL,
 354                                                &cmd->sg_frame_phys_addr);
 355
 356                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 357                                             GFP_KERNEL, &cmd->sense_phys_addr);
 358                 /*
 359                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 360                  * whatever has been allocated
 361                  */
 362                 if (!cmd->sg_frame || !cmd->sense) {
 363                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 364                         megasas_teardown_frame_pool_fusion(instance);
 365                         return -ENOMEM;
 366                 }
 367         }
 368         return 0;
 369 }
 370
 371 /**
 372  * megasas_alloc_cmds_fusion -  Allocates the command packets
 373  * @instance:           Adapter soft state
 374  *
 375  *
 376  * Each frame has a 32-bit field called context. This context is used to get
 377  * back the megasas_cmd_fusion from the frame when a frame gets completed
 378  * In this driver, the 32 bit values are the indices into an array cmd_list.
 379  * This array is used only to look up the megasas_cmd_fusion given the context.
 380  * The free commands themselves are maintained in a linked list called cmd_pool.
 381  *
 382  * cmds are formed in the io_request and sg_frame members of the
 383  * megasas_cmd_fusion. The context field is used to get a request descriptor
 384  * and is used as SMID of the cmd.
 385  * SMID value range is from 1 to max_fw_cmds.
 386  */
 387 int
 388 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 389 {
 390         int i, j, count;
 391         u32 max_cmd, io_frames_sz;
 392         struct fusion_context *fusion;
 393         struct megasas_cmd_fusion *cmd;
 394         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 395         u32 offset;
 396         dma_addr_t io_req_base_phys;
 397         u8 *io_req_base;
 398
 399         fusion = instance->ctrl_context;
 400
 401         max_cmd = instance->max_fw_cmds;
 402
 403         fusion->req_frames_desc =
 404                 dma_alloc_coherent(&instance->pdev->dev,
 405                                    fusion->request_alloc_sz,
 406                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 407
 408         if (!fusion->req_frames_desc) {
 409                 printk(KERN_ERR "megasas; Could not allocate memory for "
 410                        "request_frames\n");
 411                 goto fail_req_desc;
 412         }
 413
 414         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
 415         fusion->reply_frames_desc_pool =
 416                 pci_pool_create("reply_frames pool", instance->pdev,
 417                                 fusion->reply_alloc_sz * count, 16, 0);
 418
 419         if (!fusion->reply_frames_desc_pool) {
 420                 printk(KERN_ERR "megasas; Could not allocate memory for "
 421                        "reply_frame pool\n");
 422                 goto fail_reply_desc;
 423         }
 424
 425         fusion->reply_frames_desc =
 426                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 427                                &fusion->reply_frames_desc_phys);
 428         if (!fusion->reply_frames_desc) {
 429                 printk(KERN_ERR "megasas; Could not allocate memory for "
 430                        "reply_frame pool\n");
 431                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 432                 goto fail_reply_desc;
 433         }
 434
 435         reply_desc = fusion->reply_frames_desc;
 436         for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
 437                 reply_desc->Words = ULLONG_MAX;
 438
 439         io_frames_sz = fusion->io_frames_alloc_sz;
 440
 441         fusion->io_request_frames_pool =
 442                 pci_pool_create("io_request_frames pool", instance->pdev,
 443                                 fusion->io_frames_alloc_sz, 16, 0);
 444
 445         if (!fusion->io_request_frames_pool) {
 446                 printk(KERN_ERR "megasas: Could not allocate memory for "
 447                        "io_request_frame pool\n");
 448                 goto fail_io_frames;
 449         }
 450
 451         fusion->io_request_frames =
 452                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 453                                &fusion->io_request_frames_phys);
 454         if (!fusion->io_request_frames) {
 455                 printk(KERN_ERR "megasas: Could not allocate memory for "
 456                        "io_request_frames frames\n");
 457                 pci_pool_destroy(fusion->io_request_frames_pool);
 458                 goto fail_io_frames;
 459         }
 460
 461         /*
 462          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 463          * Allocate the dynamic array first and then allocate individual
 464          * commands.
 465          */
 466         fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
 467                                    * max_cmd, GFP_KERNEL);
 468
 469         if (!fusion->cmd_list) {
 470                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 471                        "memory for cmd_list_fusion\n");
 472                 goto fail_cmd_list;
 473         }
 474
 475         max_cmd = instance->max_fw_cmds;
 476         for (i = 0; i < max_cmd; i++) {
 477                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 478                                               GFP_KERNEL);
 479                 if (!fusion->cmd_list[i]) {
 480                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 481
 482                         for (j = 0; j < i; j++)
 483                                 kfree(fusion->cmd_list[j]);
 484
 485                         kfree(fusion->cmd_list);
 486                         fusion->cmd_list = NULL;
 487                         goto fail_cmd_list;
 488                 }
 489         }
 490
 491         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 492         io_req_base = fusion->io_request_frames +
 493                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 494         io_req_base_phys = fusion->io_request_frames_phys +
 495                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 496
 497         /*
 498          * Add all the commands to command pool (fusion->cmd_pool)
 499          */
 500
 501         /* SMID 0 is reserved. Set SMID/index from 1 */
 502         for (i = 0; i < max_cmd; i++) {
 503                 cmd = fusion->cmd_list[i];
 504                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 505                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 506                 cmd->index = i + 1;
 507                 cmd->scmd = NULL;
 508                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 509                 cmd->instance = instance;
 510                 cmd->io_request =
 511                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 512                   (io_req_base + offset);
 513                 memset(cmd->io_request, 0,
 514                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 515                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 516
 517                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 518         }
 519
 520         /*
 521          * Create a frame pool and assign one frame to each cmd
 522          */
 523         if (megasas_create_frame_pool_fusion(instance)) {
 524                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 525                 megasas_free_cmds_fusion(instance);
 526                 goto fail_req_desc;
 527         }
 528
 529         return 0;
 530
 531 fail_cmd_list:
 532         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 533                       fusion->io_request_frames_phys);
 534         pci_pool_destroy(fusion->io_request_frames_pool);
 535 fail_io_frames:
 536         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 537                           fusion->reply_frames_desc,
 538                           fusion->reply_frames_desc_phys);
 539         pci_pool_free(fusion->reply_frames_desc_pool,
 540                       fusion->reply_frames_desc,
 541                       fusion->reply_frames_desc_phys);
 542         pci_pool_destroy(fusion->reply_frames_desc_pool);
 543
 544 fail_reply_desc:
 545         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 546                           fusion->req_frames_desc,
 547                           fusion->req_frames_desc_phys);
 548 fail_req_desc:
 549         return -ENOMEM;
 550 }
 551
 552 /**
 553  * wait_and_poll -      Issues a polling command
 554  * @instance:                   Adapter soft state
 555  * @cmd:                        Command packet to be issued
 556  *
 557  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 558  */
 559 int
 560 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 561         int seconds)
 562 {
 563         int i;
 564         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 565
 566         u32 msecs = seconds * 1000;
 567
 568         /*
 569          * Wait for cmd_status to change
 570          */
 571         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 572                 rmb();
 573                 msleep(20);
 574         }
 575
 576         if (frame_hdr->cmd_status == 0xff)
 577                 return -ETIME;
 578
 579         return 0;
 580 }
 581
 582 /**
 583  * megasas_ioc_init_fusion -    Initializes the FW
 584  * @instance:           Adapter soft state
 585  *
 586  * Issues the IOC Init cmd
 587  */
 588 int
 589 megasas_ioc_init_fusion(struct megasas_instance *instance)
 590 {
 591         struct megasas_init_frame *init_frame;
 592         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 593         dma_addr_t      ioc_init_handle;
 594         struct megasas_cmd *cmd;
 595         u8 ret;
 596         struct fusion_context *fusion;
 597         union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
 598         int i;
 599         struct megasas_header *frame_hdr;
 600
 601         fusion = instance->ctrl_context;
 602
 603         cmd = megasas_get_cmd(instance);
 604
 605         if (!cmd) {
 606                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 607                 ret = 1;
 608                 goto fail_get_cmd;
 609         }
 610
 611         IOCInitMessage =
 612           dma_alloc_coherent(&instance->pdev->dev,
 613                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 614                              &ioc_init_handle, GFP_KERNEL);
 615
 616         if (!IOCInitMessage) {
 617                 printk(KERN_ERR "Could not allocate memory for "
 618                        "IOCInitMessage\n");
 619                 ret = 1;
 620                 goto fail_fw_init;
 621         }
 622
 623         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 624
 625         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 626         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 627         IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
 628         IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
 629         IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
 630
 631         IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
 632         IOCInitMessage->ReplyDescriptorPostQueueAddress = cpu_to_le64(fusion->reply_frames_desc_phys);
 633         IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
 634         IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
 635         init_frame = (struct megasas_init_frame *)cmd->frame;
 636         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 637
 638         frame_hdr = &cmd->frame->hdr;
 639         frame_hdr->cmd_status = 0xFF;
 640         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 641
 642         init_frame->cmd = MFI_CMD_INIT;
 643         init_frame->cmd_status = 0xFF;
 644
 645         /* driver support Extended MSIX */
 646         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
 647                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
 648                 init_frame->driver_operations.
 649                         mfi_capabilities.support_additional_msix = 1;
 650         /* driver supports HA / Remote LUN over Fast Path interface */
 651         init_frame->driver_operations.mfi_capabilities.support_fp_remote_lun
 652                 = 1;
 653         /* Convert capability to LE32 */
 654         cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
 655
 656         init_frame->queue_info_new_phys_addr_hi =
 657                 cpu_to_le32(upper_32_bits(ioc_init_handle));
 658         init_frame->queue_info_new_phys_addr_lo =
 659                 cpu_to_le32(lower_32_bits(ioc_init_handle));
 660         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
 661
 662         req_desc.Words = 0;
 663         req_desc.MFAIo.RequestFlags =
 664                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 665                  MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 666         cpu_to_le32s((u32 *)&req_desc.MFAIo);
 667         req_desc.Words |= cpu_to_le64(cmd->frame_phys_addr);
 668
 669         /*
 670          * disable the intr before firing the init frame
 671          */
 672         instance->instancet->disable_intr(instance);
 673
 674         for (i = 0; i < (10 * 1000); i += 20) {
 675                 if (readl(&instance->reg_set->doorbell) & 1)
 676                         msleep(20);
 677                 else
 678                         break;
 679         }
 680
 681         instance->instancet->fire_cmd(instance, req_desc.u.low,
 682                                       req_desc.u.high, instance->reg_set);
 683
 684         wait_and_poll(instance, cmd, MFI_POLL_TIMEOUT_SECS);
 685
 686         frame_hdr = &cmd->frame->hdr;
 687         if (frame_hdr->cmd_status != 0) {
 688                 ret = 1;
 689                 goto fail_fw_init;
 690         }
 691         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 692
 693         ret = 0;
 694
 695 fail_fw_init:
 696         megasas_return_cmd(instance, cmd);
 697         if (IOCInitMessage)
 698                 dma_free_coherent(&instance->pdev->dev,
 699                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 700                                   IOCInitMessage, ioc_init_handle);
 701 fail_get_cmd:
 702         return ret;
 703 }
 704
 705 /*
 706  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 707  * @instance:                           Adapter soft state
 708  * @pend:                               Pend the command or not
 709  * Issues an internal command (DCMD) to get the FW's controller PD
 710  * list structure.  This information is mainly used to find out SYSTEM
 711  * supported by the FW.
 712  */
 713 static int
 714 megasas_get_ld_map_info(struct megasas_instance *instance)
 715 {
 716         int ret = 0;
 717         struct megasas_cmd *cmd;
 718         struct megasas_dcmd_frame *dcmd;
 719         struct MR_FW_RAID_MAP_ALL *ci;
 720         dma_addr_t ci_h = 0;
 721         u32 size_map_info;
 722         struct fusion_context *fusion;
 723
 724         cmd = megasas_get_cmd(instance);
 725
 726         if (!cmd) {
 727                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 728                 return -ENOMEM;
 729         }
 730
 731         fusion = instance->ctrl_context;
 732
 733         if (!fusion) {
 734                 megasas_return_cmd(instance, cmd);
 735                 return -ENXIO;
 736         }
 737
 738         dcmd = &cmd->frame->dcmd;
 739
 740         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 741                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 742
 743         ci = fusion->ld_map[(instance->map_id & 1)];
 744         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 745
 746         if (!ci) {
 747                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 748                 megasas_return_cmd(instance, cmd);
 749                 return -ENOMEM;
 750         }
 751
 752         memset(ci, 0, sizeof(*ci));
 753         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 754
 755         dcmd->cmd = MFI_CMD_DCMD;
 756         dcmd->cmd_status = 0xFF;
 757         dcmd->sge_count = 1;
 758         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
 759         dcmd->timeout = 0;
 760         dcmd->pad_0 = 0;
 761         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 762         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 763         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 764         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 765
 766         if (!megasas_issue_polled(instance, cmd))
 767                 ret = 0;
 768         else {
 769                 printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
 770                 ret = -1;
 771         }
 772
 773         megasas_return_cmd(instance, cmd);
 774
 775         return ret;
 776 }
 777
 778 u8
 779 megasas_get_map_info(struct megasas_instance *instance)
 780 {
 781         struct fusion_context *fusion = instance->ctrl_context;
 782
 783         fusion->fast_path_io = 0;
 784         if (!megasas_get_ld_map_info(instance)) {
 785                 if (MR_ValidateMapInfo(instance)) {
 786                         fusion->fast_path_io = 1;
 787                         return 0;
 788                 }
 789         }
 790         return 1;
 791 }
 792
 793 /*
 794  * megasas_sync_map_info -      Returns FW's ld_map structure
 795  * @instance:                           Adapter soft state
 796  *
 797  * Issues an internal command (DCMD) to get the FW's controller PD
 798  * list structure.  This information is mainly used to find out SYSTEM
 799  * supported by the FW.
 800  */
 801 int
 802 megasas_sync_map_info(struct megasas_instance *instance)
 803 {
 804         int ret = 0, i;
 805         struct megasas_cmd *cmd;
 806         struct megasas_dcmd_frame *dcmd;
 807         u32 size_sync_info, num_lds;
 808         struct fusion_context *fusion;
 809         struct MR_LD_TARGET_SYNC *ci = NULL;
 810         struct MR_FW_RAID_MAP_ALL *map;
 811         struct MR_LD_RAID  *raid;
 812         struct MR_LD_TARGET_SYNC *ld_sync;
 813         dma_addr_t ci_h = 0;
 814         u32 size_map_info;
 815
 816         cmd = megasas_get_cmd(instance);
 817
 818         if (!cmd) {
 819                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 820                        "info.\n");
 821                 return -ENOMEM;
 822         }
 823
 824         fusion = instance->ctrl_context;
 825
 826         if (!fusion) {
 827                 megasas_return_cmd(instance, cmd);
 828                 return 1;
 829         }
 830
 831         map = fusion->ld_map[instance->map_id & 1];
 832
 833         num_lds = le32_to_cpu(map->raidMap.ldCount);
 834
 835         dcmd = &cmd->frame->dcmd;
 836
 837         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 838
 839         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 840
 841         ci = (struct MR_LD_TARGET_SYNC *)
 842           fusion->ld_map[(instance->map_id - 1) & 1];
 843         memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
 844
 845         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 846
 847         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 848
 849         for (i = 0; i < num_lds; i++, ld_sync++) {
 850                 raid = MR_LdRaidGet(i, map);
 851                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 852                 ld_sync->seqNum = raid->seqNum;
 853         }
 854
 855         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 856                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 857
 858         dcmd->cmd = MFI_CMD_DCMD;
 859         dcmd->cmd_status = 0xFF;
 860         dcmd->sge_count = 1;
 861         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_WRITE);
 862         dcmd->timeout = 0;
 863         dcmd->pad_0 = 0;
 864         dcmd->data_xfer_len = cpu_to_le32(size_map_info);
 865         dcmd->mbox.b[0] = num_lds;
 866         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 867         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
 868         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
 869         dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
 870
 871         instance->map_update_cmd = cmd;
 872
 873         instance->instancet->issue_dcmd(instance, cmd);
 874
 875         return ret;
 876 }
 877
 878 /*
 879  * meagasas_display_intel_branding - Display branding string
 880  * @instance: per adapter object
 881  *
 882  * Return nothing.
 883  */
 884 static void
 885 megasas_display_intel_branding(struct megasas_instance *instance)
 886 {
 887         if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
 888                 return;
 889
 890         switch (instance->pdev->device) {
 891         case PCI_DEVICE_ID_LSI_INVADER:
 892                 switch (instance->pdev->subsystem_device) {
 893                 case MEGARAID_INTEL_RS3DC080_SSDID:
 894                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 895                                 instance->host->host_no,
 896                                 MEGARAID_INTEL_RS3DC080_BRANDING);
 897                         break;
 898                 case MEGARAID_INTEL_RS3DC040_SSDID:
 899                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 900                                 instance->host->host_no,
 901                                 MEGARAID_INTEL_RS3DC040_BRANDING);
 902                         break;
 903                 case MEGARAID_INTEL_RS3SC008_SSDID:
 904                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 905                                 instance->host->host_no,
 906                                 MEGARAID_INTEL_RS3SC008_BRANDING);
 907                         break;
 908                 case MEGARAID_INTEL_RS3MC044_SSDID:
 909                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 910                                 instance->host->host_no,
 911                                 MEGARAID_INTEL_RS3MC044_BRANDING);
 912                         break;
 913                 default:
 914                         break;
 915                 }
 916                 break;
 917         case PCI_DEVICE_ID_LSI_FURY:
 918                 switch (instance->pdev->subsystem_device) {
 919                 case MEGARAID_INTEL_RS3WC080_SSDID:
 920                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 921                                 instance->host->host_no,
 922                                 MEGARAID_INTEL_RS3WC080_BRANDING);
 923                         break;
 924                 case MEGARAID_INTEL_RS3WC040_SSDID:
 925                         dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
 926                                 instance->host->host_no,
 927                                 MEGARAID_INTEL_RS3WC040_BRANDING);
 928                         break;
 929                 default:
 930                         break;
 931                 }
 932                 break;
 933         default:
 934                 break;
 935         }
 936 }
 937
 938 /**
 939  * megasas_init_adapter_fusion -        Initializes the FW
 940  * @instance:           Adapter soft state
 941  *
 942  * This is the main function for initializing firmware.
 943  */
 944 u32
 945 megasas_init_adapter_fusion(struct megasas_instance *instance)
 946 {
 947         struct megasas_register_set __iomem *reg_set;
 948         struct fusion_context *fusion;
 949         u32 max_cmd;
 950         int i = 0, count;
 951
 952         fusion = instance->ctrl_context;
 953
 954         reg_set = instance->reg_set;
 955
 956         /*
 957          * Get various operational parameters from status register
 958          */
 959         instance->max_fw_cmds =
 960                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
 961         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
 962
 963         /*
 964          * Reduce the max supported cmds by 1. This is to ensure that the
 965          * reply_q_sz (1 more than the max cmd that driver may send)
 966          * does not exceed max cmds that the FW can support
 967          */
 968         instance->max_fw_cmds = instance->max_fw_cmds-1;
 969         /* Only internal cmds (DCMD) need to have MFI frames */
 970         instance->max_mfi_cmds = MEGASAS_INT_CMDS;
 971
 972         max_cmd = instance->max_fw_cmds;
 973
 974         fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
 975
 976         fusion->request_alloc_sz =
 977                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
 978         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
 979                 *(fusion->reply_q_depth);
 980         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
 981                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
 982                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
 983
 984         fusion->max_sge_in_main_msg =
 985           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 986            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 987
 988         fusion->max_sge_in_chain =
 989                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
 990
 991         instance->max_num_sge = fusion->max_sge_in_main_msg +
 992                 fusion->max_sge_in_chain - 2;
 993
 994         /* Used for pass thru MFI frame (DCMD) */
 995         fusion->chain_offset_mfi_pthru =
 996                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 997
 998         fusion->chain_offset_io_request =
 999                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
1000                  sizeof(union MPI2_SGE_IO_UNION))/16;
1001
1002         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
1003         for (i = 0 ; i < count; i++)
1004                 fusion->last_reply_idx[i] = 0;
1005
1006         /*
1007          * Allocate memory for descriptors
1008          * Create a pool of commands
1009          */
1010         if (megasas_alloc_cmds(instance))
1011                 goto fail_alloc_mfi_cmds;
1012         if (megasas_alloc_cmds_fusion(instance))
1013                 goto fail_alloc_cmds;
1014
1015         if (megasas_ioc_init_fusion(instance))
1016                 goto fail_ioc_init;
1017
1018         megasas_display_intel_branding(instance);
1019
1020         instance->flag_ieee = 1;
1021
1022         fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
1023           (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
1024
1025         fusion->fast_path_io = 0;
1026
1027         for (i = 0; i < 2; i++) {
1028                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
1029                                                        fusion->map_sz,
1030                                                        &fusion->ld_map_phys[i],
1031                                                        GFP_KERNEL);
1032                 if (!fusion->ld_map[i]) {
1033                         printk(KERN_ERR "megasas: Could not allocate memory "
1034                                "for map info\n");
1035                         goto fail_map_info;
1036                 }
1037         }
1038
1039         if (!megasas_get_map_info(instance))
1040                 megasas_sync_map_info(instance);
1041
1042         return 0;
1043
1044 fail_map_info:
1045         if (i == 1)
1046                 dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
1047                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
1048 fail_ioc_init:
1049         megasas_free_cmds_fusion(instance);
1050 fail_alloc_cmds:
1051         megasas_free_cmds(instance);
1052 fail_alloc_mfi_cmds:
1053         return 1;
1054 }
1055
1056 /**
1057  * megasas_fire_cmd_fusion -    Sends command to the FW
1058  * @frame_phys_addr :           Physical address of cmd
1059  * @frame_count :               Number of frames for the command
1060  * @regs :                      MFI register set
1061  */
1062 void
1063 megasas_fire_cmd_fusion(struct megasas_instance *instance,
1064                         dma_addr_t req_desc_lo,
1065                         u32 req_desc_hi,
1066                         struct megasas_register_set __iomem *regs)
1067 {
1068         unsigned long flags;
1069
1070         spin_lock_irqsave(&instance->hba_lock, flags);
1071
1072         writel(le32_to_cpu(req_desc_lo), &(regs)->inbound_low_queue_port);
1073         writel(le32_to_cpu(req_desc_hi), &(regs)->inbound_high_queue_port);
1074         spin_unlock_irqrestore(&instance->hba_lock, flags);
1075 }
1076
1077 /**
1078  * map_cmd_status -     Maps FW cmd status to OS cmd status
1079  * @cmd :               Pointer to cmd
1080  * @status :            status of cmd returned by FW
1081  * @ext_status :        ext status of cmd returned by FW
1082  */
1083
1084 void
1085 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1086 {
1087
1088         switch (status) {
1089
1090         case MFI_STAT_OK:
1091                 cmd->scmd->result = DID_OK << 16;
1092                 break;
1093
1094         case MFI_STAT_SCSI_IO_FAILED:
1095         case MFI_STAT_LD_INIT_IN_PROGRESS:
1096                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1097                 break;
1098
1099         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1100
1101                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1102                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1103                         memset(cmd->scmd->sense_buffer, 0,
1104                                SCSI_SENSE_BUFFERSIZE);
1105                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1106                                SCSI_SENSE_BUFFERSIZE);
1107                         cmd->scmd->result |= DRIVER_SENSE << 24;
1108                 }
1109                 break;
1110
1111         case MFI_STAT_LD_OFFLINE:
1112         case MFI_STAT_DEVICE_NOT_FOUND:
1113                 cmd->scmd->result = DID_BAD_TARGET << 16;
1114                 break;
1115         case MFI_STAT_CONFIG_SEQ_MISMATCH:
1116                 cmd->scmd->result = DID_IMM_RETRY << 16;
1117                 break;
1118         default:
1119                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1120                 cmd->scmd->result = DID_ERROR << 16;
1121                 break;
1122         }
1123 }
1124
1125 /**
1126  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1127  * @instance:           Adapter soft state
1128  * @scp:                SCSI command from the mid-layer
1129  * @sgl_ptr:            SGL to be filled in
1130  * @cmd:                cmd we are working on
1131  *
1132  * If successful, this function returns the number of SG elements.
1133  */
1134 static int
1135 megasas_make_sgl_fusion(struct megasas_instance *instance,
1136                         struct scsi_cmnd *scp,
1137                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1138                         struct megasas_cmd_fusion *cmd)
1139 {
1140         int i, sg_processed, sge_count;
1141         struct scatterlist *os_sgl;
1142         struct fusion_context *fusion;
1143
1144         fusion = instance->ctrl_context;
1145
1146         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1147                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1148                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
1149                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
1150                 sgl_ptr_end->Flags = 0;
1151         }
1152
1153         sge_count = scsi_dma_map(scp);
1154
1155         BUG_ON(sge_count < 0);
1156
1157         if (sge_count > instance->max_num_sge || !sge_count)
1158                 return sge_count;
1159
1160         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1161                 sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
1162                 sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
1163                 sgl_ptr->Flags = 0;
1164                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1165                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1166                         if (i == sge_count - 1)
1167                                 sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
1168                 }
1169                 sgl_ptr++;
1170
1171                 sg_processed = i + 1;
1172
1173                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1174                     (sge_count > fusion->max_sge_in_main_msg)) {
1175
1176                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1177                         if ((instance->pdev->device ==
1178                                 PCI_DEVICE_ID_LSI_INVADER) ||
1179                                 (instance->pdev->device ==
1180                                 PCI_DEVICE_ID_LSI_FURY)) {
1181                                 if ((le16_to_cpu(cmd->io_request->IoFlags) &
1182                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
1183                                         MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
1184                                         cmd->io_request->ChainOffset =
1185                                                 fusion->
1186                                                 chain_offset_io_request;
1187                                 else
1188                                         cmd->io_request->ChainOffset = 0;
1189                         } else
1190                                 cmd->io_request->ChainOffset =
1191                                         fusion->chain_offset_io_request;
1192
1193                         sg_chain = sgl_ptr;
1194                         /* Prepare chain element */
1195                         sg_chain->NextChainOffset = 0;
1196                         if ((instance->pdev->device ==
1197                                 PCI_DEVICE_ID_LSI_INVADER) ||
1198                                 (instance->pdev->device ==
1199                                 PCI_DEVICE_ID_LSI_FURY))
1200                                 sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
1201                         else
1202                                 sg_chain->Flags =
1203                                         (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1204                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1205                         sg_chain->Length =  cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
1206                         sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
1207
1208                         sgl_ptr =
1209                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1210                 }
1211         }
1212
1213         return sge_count;
1214 }
1215
1216 /**
1217  * megasas_set_pd_lba - Sets PD LBA
1218  * @cdb:                CDB
1219  * @cdb_len:            cdb length
1220  * @start_blk:          Start block of IO
1221  *
1222  * Used to set the PD LBA in CDB for FP IOs
1223  */
1224 void
1225 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1226                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1227                    struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1228 {
1229         struct MR_LD_RAID *raid;
1230         u32 ld;
1231         u64 start_blk = io_info->pdBlock;
1232         u8 *cdb = io_request->CDB.CDB32;
1233         u32 num_blocks = io_info->numBlocks;
1234         u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
1235
1236         /* Check if T10 PI (DIF) is enabled for this LD */
1237         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1238         raid = MR_LdRaidGet(ld, local_map_ptr);
1239         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1240                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1241                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1242                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1243
1244                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1245                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1246                 else
1247                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1248                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1249
1250                 /* LBA */
1251                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1252                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1253                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1254                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1255                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1256                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1257                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1258                 cdb[19] = (u8)(start_blk & 0xff);
1259
1260                 /* Logical block reference tag */
1261                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1262                         cpu_to_be32(ref_tag);
1263                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
1264                 io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
1265
1266                 /* Transfer length */
1267                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1268                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1269                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1270                 cdb[31] = (u8)(num_blocks & 0xff);
1271
1272                 /* set SCSI IO EEDPFlags */
1273                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1274                         io_request->EEDPFlags = cpu_to_le16(
1275                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1276                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1277                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1278                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1279                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
1280                 } else {
1281                         io_request->EEDPFlags = cpu_to_le16(
1282                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1283                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
1284                 }
1285                 io_request->Control |= cpu_to_le32((0x4 << 26));
1286                 io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
1287         } else {
1288                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1289                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1290                     (start_blk <= 0xffffffff)) {
1291                         if (cdb_len == 16) {
1292                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1293                                 flagvals = cdb[1];
1294                                 groupnum = cdb[14];
1295                                 control = cdb[15];
1296                         } else {
1297                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1298                                 flagvals = cdb[1];
1299                                 groupnum = cdb[10];
1300                                 control = cdb[11];
1301                         }
1302
1303                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1304
1305                         cdb[0] = opcode;
1306                         cdb[1] = flagvals;
1307                         cdb[6] = groupnum;
1308                         cdb[9] = control;
1309
1310                         /* Transfer length */
1311                         cdb[8] = (u8)(num_blocks & 0xff);
1312                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1313
1314                         io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
1315                         cdb_len = 10;
1316                 } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
1317                         /* Convert to 16 byte CDB for large LBA's */
1318                         switch (cdb_len) {
1319                         case 6:
1320                                 opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
1321                                 control = cdb[5];
1322                                 break;
1323                         case 10:
1324                                 opcode =
1325                                         cdb[0] == READ_10 ? READ_16 : WRITE_16;
1326                                 flagvals = cdb[1];
1327                                 groupnum = cdb[6];
1328                                 control = cdb[9];
1329                                 break;
1330                         case 12:
1331                                 opcode =
1332                                         cdb[0] == READ_12 ? READ_16 : WRITE_16;
1333                                 flagvals = cdb[1];
1334                                 groupnum = cdb[10];
1335                                 control = cdb[11];
1336                                 break;
1337                         }
1338
1339                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1340
1341                         cdb[0] = opcode;
1342                         cdb[1] = flagvals;
1343                         cdb[14] = groupnum;
1344                         cdb[15] = control;
1345
1346                         /* Transfer length */
1347                         cdb[13] = (u8)(num_blocks & 0xff);
1348                         cdb[12] = (u8)((num_blocks >> 8) & 0xff);
1349                         cdb[11] = (u8)((num_blocks >> 16) & 0xff);
1350                         cdb[10] = (u8)((num_blocks >> 24) & 0xff);
1351
1352                         io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
1353                         cdb_len = 16;
1354                 }
1355
1356                 /* Normal case, just load LBA here */
1357                 switch (cdb_len) {
1358                 case 6:
1359                 {
1360                         u8 val = cdb[1] & 0xE0;
1361                         cdb[3] = (u8)(start_blk & 0xff);
1362                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1363                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1364                         break;
1365                 }
1366                 case 10:
1367                         cdb[5] = (u8)(start_blk & 0xff);
1368                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1369                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1370                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1371                         break;
1372                 case 12:
1373                         cdb[5]    = (u8)(start_blk & 0xff);
1374                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1375                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1376                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1377                         break;
1378                 case 16:
1379                         cdb[9]    = (u8)(start_blk & 0xff);
1380                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1381                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1382                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1383                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1384                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1385                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1386                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1387                         break;
1388                 }
1389         }
1390 }
1391
1392 /**
1393  * megasas_build_ldio_fusion -  Prepares IOs to devices
1394  * @instance:           Adapter soft state
1395  * @scp:                SCSI command
1396  * @cmd:                Command to be prepared
1397  *
1398  * Prepares the io_request and chain elements (sg_frame) for IO
1399  * The IO can be for PD (Fast Path) or LD
1400  */
1401 void
1402 megasas_build_ldio_fusion(struct megasas_instance *instance,
1403                           struct scsi_cmnd *scp,
1404                           struct megasas_cmd_fusion *cmd)
1405 {
1406         u8 fp_possible;
1407         u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
1408         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1409         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1410         struct IO_REQUEST_INFO io_info;
1411         struct fusion_context *fusion;
1412         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1413         u8 *raidLUN;
1414
1415         device_id = MEGASAS_DEV_INDEX(instance, scp);
1416
1417         fusion = instance->ctrl_context;
1418
1419         io_request = cmd->io_request;
1420         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1421         io_request->RaidContext.status = 0;
1422         io_request->RaidContext.exStatus = 0;
1423
1424         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1425
1426         start_lba_lo = 0;
1427         start_lba_hi = 0;
1428         fp_possible = 0;
1429
1430         /*
1431          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1432          */
1433         if (scp->cmd_len == 6) {
1434                 datalength = (u32) scp->cmnd[4];
1435                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1436                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1437
1438                 start_lba_lo &= 0x1FFFFF;
1439         }
1440
1441         /*
1442          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1443          */
1444         else if (scp->cmd_len == 10) {
1445                 datalength = (u32) scp->cmnd[8] |
1446                         ((u32) scp->cmnd[7] << 8);
1447                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1448                         ((u32) scp->cmnd[3] << 16) |
1449                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1450         }
1451
1452         /*
1453          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1454          */
1455         else if (scp->cmd_len == 12) {
1456                 datalength = ((u32) scp->cmnd[6] << 24) |
1457                         ((u32) scp->cmnd[7] << 16) |
1458                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1459                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1460                         ((u32) scp->cmnd[3] << 16) |
1461                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1462         }
1463
1464         /*
1465          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1466          */
1467         else if (scp->cmd_len == 16) {
1468                 datalength = ((u32) scp->cmnd[10] << 24) |
1469                         ((u32) scp->cmnd[11] << 16) |
1470                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1471                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1472                         ((u32) scp->cmnd[7] << 16) |
1473                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1474
1475                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1476                         ((u32) scp->cmnd[3] << 16) |
1477                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1478         }
1479
1480         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1481         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1482         io_info.numBlocks = datalength;
1483         io_info.ldTgtId = device_id;
1484         io_request->DataLength = cpu_to_le32(scsi_bufflen(scp));
1485
1486         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1487                 io_info.isRead = 1;
1488
1489         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1490
1491         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1492              MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
1493                 io_request->RaidContext.regLockFlags  = 0;
1494                 fp_possible = 0;
1495         } else {
1496                 if (MR_BuildRaidContext(instance, &io_info,
1497                                         &io_request->RaidContext,
1498                                         local_map_ptr, &raidLUN))
1499                         fp_possible = io_info.fpOkForIo;
1500         }
1501
1502         /* Use smp_processor_id() for now until cmd->request->cpu is CPU
1503            id by default, not CPU group id, otherwise all MSI-X queues won't
1504            be utilized */
1505         cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
1506                 smp_processor_id() % instance->msix_vectors : 0;
1507
1508         if (fp_possible) {
1509                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1510                                    local_map_ptr, start_lba_lo);
1511                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1512                 cmd->request_desc->SCSIIO.RequestFlags =
1513                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1514                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1515                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1516                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1517                         if (io_request->RaidContext.regLockFlags ==
1518                             REGION_TYPE_UNUSED)
1519                                 cmd->request_desc->SCSIIO.RequestFlags =
1520                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1521                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1522                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1523                         io_request->RaidContext.nseg = 0x1;
1524                         io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
1525                         io_request->RaidContext.regLockFlags |=
1526                           (MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
1527                            MR_RL_FLAGS_SEQ_NUM_ENABLE);
1528                 }
1529                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1530                     (io_info.isRead)) {
1531                         io_info.devHandle =
1532                                 get_updated_dev_handle(
1533                                         &fusion->load_balance_info[device_id],
1534                                         &io_info);
1535                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1536                 } else
1537                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1538                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1539                 io_request->DevHandle = io_info.devHandle;
1540                 /* populate the LUN field */
1541                 memcpy(io_request->LUN, raidLUN, 8);
1542         } else {
1543                 io_request->RaidContext.timeoutValue =
1544                         cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
1545                 cmd->request_desc->SCSIIO.RequestFlags =
1546                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1547                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1548                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1549                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1550                         if (io_request->RaidContext.regLockFlags ==
1551                             REGION_TYPE_UNUSED)
1552                                 cmd->request_desc->SCSIIO.RequestFlags =
1553                                         (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
1554                                         MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1555                         io_request->RaidContext.Type = MPI2_TYPE_CUDA;
1556                         io_request->RaidContext.regLockFlags |=
1557                                 (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
1558                                  MR_RL_FLAGS_SEQ_NUM_ENABLE);
1559                         io_request->RaidContext.nseg = 0x1;
1560                 }
1561                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1562                 io_request->DevHandle = cpu_to_le16(device_id);
1563         } /* Not FP */
1564 }
1565
1566 /**
1567  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1568  * @instance:           Adapter soft state
1569  * @scp:                SCSI command
1570  * @cmd:                Command to be prepared
1571  *
1572  * Prepares the io_request frame for non-io cmds
1573  */
1574 static void
1575 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1576                           struct scsi_cmnd *scmd,
1577                           struct megasas_cmd_fusion *cmd)
1578 {
1579         u32 device_id;
1580         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1581         u16 pd_index = 0;
1582         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1583         struct fusion_context *fusion = instance->ctrl_context;
1584         u8                          span, physArm;
1585         u16                         devHandle;
1586         u32                         ld, arRef, pd;
1587         struct MR_LD_RAID                  *raid;
1588         struct RAID_CONTEXT                *pRAID_Context;
1589
1590         io_request = cmd->io_request;
1591         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1592         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1593                 +scmd->device->id;
1594         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1595
1596         io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
1597
1598
1599         /* Check if this is a system PD I/O */
1600         if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
1601             instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1602                 io_request->Function = 0;
1603                 if (fusion->fast_path_io)
1604                         io_request->DevHandle =
1605                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1606                 io_request->RaidContext.timeoutValue =
1607                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1608                 io_request->RaidContext.regLockFlags = 0;
1609                 io_request->RaidContext.regLockRowLBA = 0;
1610                 io_request->RaidContext.regLockLength = 0;
1611                 io_request->RaidContext.RAIDFlags =
1612                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
1613                         MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1614                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1615                         (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
1616                         io_request->IoFlags |= cpu_to_le16(
1617                                 MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
1618                 cmd->request_desc->SCSIIO.RequestFlags =
1619                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1620                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1621                 cmd->request_desc->SCSIIO.DevHandle =
1622                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1623                 cmd->request_desc->SCSIIO.MSIxIndex =
1624                         instance->msix_vectors ? smp_processor_id() % instance->msix_vectors : 0;
1625                 /*
1626                  * If the command is for the tape device, set the
1627                  * FP timeout to the os layer timeout value.
1628                  */
1629                 if (scmd->device->type == TYPE_TAPE) {
1630                         if ((scmd->request->timeout / HZ) > 0xFFFF)
1631                                 io_request->RaidContext.timeoutValue =
1632                                         0xFFFF;
1633                         else
1634                                 io_request->RaidContext.timeoutValue =
1635                                         scmd->request->timeout / HZ;
1636                 }
1637         } else {
1638                 if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
1639                         goto NonFastPath;
1640
1641                 ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
1642                 if ((ld >= MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io))
1643                         goto NonFastPath;
1644
1645                 raid = MR_LdRaidGet(ld, local_map_ptr);
1646
1647                 /* check if this LD is FP capable */
1648                 if (!(raid->capability.fpNonRWCapable))
1649                         /* not FP capable, send as non-FP */
1650                         goto NonFastPath;
1651
1652                 /* get RAID_Context pointer */
1653                 pRAID_Context = &io_request->RaidContext;
1654
1655                 /* set RAID context values */
1656                 pRAID_Context->regLockFlags     = REGION_TYPE_SHARED_READ;
1657                 pRAID_Context->timeoutValue     = raid->fpIoTimeoutForLd;
1658                 pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
1659                 pRAID_Context->regLockRowLBA    = 0;
1660                 pRAID_Context->regLockLength    = 0;
1661                 pRAID_Context->configSeqNum     = raid->seqNum;
1662
1663                 /* get the DevHandle for the PD (since this is
1664                    fpNonRWCapable, this is a single disk RAID0) */
1665                 span = physArm = 0;
1666                 arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
1667                 pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
1668                 devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
1669
1670                 /* build request descriptor */
1671                 cmd->request_desc->SCSIIO.RequestFlags =
1672                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1673                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1674                 cmd->request_desc->SCSIIO.DevHandle = devHandle;
1675
1676                 /* populate the LUN field */
1677                 memcpy(io_request->LUN, raid->LUN, 8);
1678
1679                 /* build the raidScsiIO structure */
1680                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1681                 io_request->DevHandle = devHandle;
1682
1683                 return;
1684
1685 NonFastPath:
1686                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1687                 io_request->DevHandle = cpu_to_le16(device_id);
1688                 cmd->request_desc->SCSIIO.RequestFlags =
1689                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1690                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1691         }
1692         io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
1693         io_request->LUN[1] = scmd->device->lun;
1694 }
1695
1696 /**
1697  * megasas_build_io_fusion -    Prepares IOs to devices
1698  * @instance:           Adapter soft state
1699  * @scp:                SCSI command
1700  * @cmd:                Command to be prepared
1701  *
1702  * Invokes helper functions to prepare request frames
1703  * and sets flags appropriate for IO/Non-IO cmd
1704  */
1705 int
1706 megasas_build_io_fusion(struct megasas_instance *instance,
1707                         struct scsi_cmnd *scp,
1708                         struct megasas_cmd_fusion *cmd)
1709 {
1710         u32 device_id, sge_count;
1711         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1712
1713         device_id = MEGASAS_DEV_INDEX(instance, scp);
1714
1715         /* Zero out some fields so they don't get reused */
1716         io_request->LUN[1] = 0;
1717         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1718         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1719         io_request->EEDPFlags = 0;
1720         io_request->Control = 0;
1721         io_request->EEDPBlockSize = 0;
1722         io_request->ChainOffset = 0;
1723         io_request->RaidContext.RAIDFlags = 0;
1724         io_request->RaidContext.Type = 0;
1725         io_request->RaidContext.nseg = 0;
1726
1727         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1728         /*
1729          * Just the CDB length,rest of the Flags are zero
1730          * This will be modified for FP in build_ldio_fusion
1731          */
1732         io_request->IoFlags = cpu_to_le16(scp->cmd_len);
1733
1734         if (megasas_is_ldio(scp))
1735                 megasas_build_ldio_fusion(instance, scp, cmd);
1736         else
1737                 megasas_build_dcdb_fusion(instance, scp, cmd);
1738
1739         /*
1740          * Construct SGL
1741          */
1742
1743         sge_count =
1744                 megasas_make_sgl_fusion(instance, scp,
1745                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1746                                         &io_request->SGL, cmd);
1747
1748         if (sge_count > instance->max_num_sge) {
1749                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1750                        "max (0x%x) allowed\n", sge_count,
1751                        instance->max_num_sge);
1752                 return 1;
1753         }
1754
1755         io_request->RaidContext.numSGE = sge_count;
1756
1757         io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
1758
1759         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1760                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
1761         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1762                 io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
1763
1764         io_request->SGLOffset0 =
1765                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1766
1767         io_request->SenseBufferLowAddress = cpu_to_le32(cmd->sense_phys_addr);
1768         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1769
1770         cmd->scmd = scp;
1771         scp->SCp.ptr = (char *)cmd;
1772
1773         return 0;
1774 }
1775
1776 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1777 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1778 {
1779         u8 *p;
1780         struct fusion_context *fusion;
1781
1782         if (index >= instance->max_fw_cmds) {
1783                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1784                        "descriptor for scsi%d\n", index,
1785                         instance->host->host_no);
1786                 return NULL;
1787         }
1788         fusion = instance->ctrl_context;
1789         p = fusion->req_frames_desc
1790                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1791
1792         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1793 }
1794
1795 /**
1796  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1797  *                                     issuing non IOCTL cmd
1798  * @instance:                   Adapter soft state
1799  * @scmd:                       pointer to scsi cmd from OS
1800  */
1801 static u32
1802 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1803                                    struct scsi_cmnd *scmd)
1804 {
1805         struct megasas_cmd_fusion *cmd;
1806         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1807         u32 index;
1808         struct fusion_context *fusion;
1809
1810         fusion = instance->ctrl_context;
1811
1812         cmd = megasas_get_cmd_fusion(instance);
1813         if (!cmd)
1814                 return SCSI_MLQUEUE_HOST_BUSY;
1815
1816         index = cmd->index;
1817
1818         req_desc = megasas_get_request_descriptor(instance, index-1);
1819         if (!req_desc)
1820                 return 1;
1821
1822         req_desc->Words = 0;
1823         cmd->request_desc = req_desc;
1824
1825         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1826                 megasas_return_cmd_fusion(instance, cmd);
1827                 printk(KERN_ERR "megasas: Error building command.\n");
1828                 cmd->request_desc = NULL;
1829                 return 1;
1830         }
1831
1832         req_desc = cmd->request_desc;
1833         req_desc->SCSIIO.SMID = cpu_to_le16(index);
1834
1835         if (cmd->io_request->ChainOffset != 0 &&
1836             cmd->io_request->ChainOffset != 0xF)
1837                 printk(KERN_ERR "megasas: The chain offset value is not "
1838                        "correct : %x\n", cmd->io_request->ChainOffset);
1839
1840         /*
1841          * Issue the command to the FW
1842          */
1843         atomic_inc(&instance->fw_outstanding);
1844
1845         instance->instancet->fire_cmd(instance,
1846                                       req_desc->u.low, req_desc->u.high,
1847                                       instance->reg_set);
1848
1849         return 0;
1850 }
1851
1852 /**
1853  * complete_cmd_fusion -        Completes command
1854  * @instance:                   Adapter soft state
1855  * Completes all commands that is in reply descriptor queue
1856  */
1857 int
1858 complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
1859 {
1860         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1861         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1862         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1863         struct fusion_context *fusion;
1864         struct megasas_cmd *cmd_mfi;
1865         struct megasas_cmd_fusion *cmd_fusion;
1866         u16 smid, num_completed;
1867         u8 reply_descript_type, arm;
1868         u32 status, extStatus, device_id;
1869         union desc_value d_val;
1870         struct LD_LOAD_BALANCE_INFO *lbinfo;
1871
1872         fusion = instance->ctrl_context;
1873
1874         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1875                 return IRQ_HANDLED;
1876
1877         desc = fusion->reply_frames_desc;
1878         desc += ((MSIxIndex * fusion->reply_alloc_sz)/
1879                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
1880                 fusion->last_reply_idx[MSIxIndex];
1881
1882         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1883
1884         d_val.word = desc->Words;
1885
1886         reply_descript_type = reply_desc->ReplyFlags &
1887                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1888
1889         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1890                 return IRQ_NONE;
1891
1892         num_completed = 0;
1893
1894         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
1895                 smid = le16_to_cpu(reply_desc->SMID);
1896
1897                 cmd_fusion = fusion->cmd_list[smid - 1];
1898
1899                 scsi_io_req =
1900                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
1901                   cmd_fusion->io_request;
1902
1903                 if (cmd_fusion->scmd)
1904                         cmd_fusion->scmd->SCp.ptr = NULL;
1905
1906                 status = scsi_io_req->RaidContext.status;
1907                 extStatus = scsi_io_req->RaidContext.exStatus;
1908
1909                 switch (scsi_io_req->Function) {
1910                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
1911                         /* Update load balancing info */
1912                         device_id = MEGASAS_DEV_INDEX(instance,
1913                                                       cmd_fusion->scmd);
1914                         lbinfo = &fusion->load_balance_info[device_id];
1915                         if (cmd_fusion->scmd->SCp.Status &
1916                             MEGASAS_LOAD_BALANCE_FLAG) {
1917                                 arm = lbinfo->raid1DevHandle[0] ==
1918                                         cmd_fusion->io_request->DevHandle ? 0 :
1919                                         1;
1920                                 atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
1921                                 cmd_fusion->scmd->SCp.Status &=
1922                                         ~MEGASAS_LOAD_BALANCE_FLAG;
1923                         }
1924                         if (reply_descript_type ==
1925                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
1926                                 if (megasas_dbg_lvl == 5)
1927                                         printk(KERN_ERR "\nmegasas: FAST Path "
1928                                                "IO Success\n");
1929                         }
1930                         /* Fall thru and complete IO */
1931                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
1932                         /* Map the FW Cmd Status */
1933                         map_cmd_status(cmd_fusion, status, extStatus);
1934                         scsi_dma_unmap(cmd_fusion->scmd);
1935                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
1936                         scsi_io_req->RaidContext.status = 0;
1937                         scsi_io_req->RaidContext.exStatus = 0;
1938                         megasas_return_cmd_fusion(instance, cmd_fusion);
1939                         atomic_dec(&instance->fw_outstanding);
1940
1941                         break;
1942                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
1943                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1944                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1945                         cmd_fusion->flags = 0;
1946                         megasas_return_cmd_fusion(instance, cmd_fusion);
1947
1948                         break;
1949                 }
1950
1951                 fusion->last_reply_idx[MSIxIndex]++;
1952                 if (fusion->last_reply_idx[MSIxIndex] >=
1953                     fusion->reply_q_depth)
1954                         fusion->last_reply_idx[MSIxIndex] = 0;
1955
1956                 desc->Words = ULLONG_MAX;
1957                 num_completed++;
1958
1959                 /* Get the next reply descriptor */
1960                 if (!fusion->last_reply_idx[MSIxIndex])
1961                         desc = fusion->reply_frames_desc +
1962                                 ((MSIxIndex * fusion->reply_alloc_sz)/
1963                                  sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
1964                 else
1965                         desc++;
1966
1967                 reply_desc =
1968                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1969
1970                 d_val.word = desc->Words;
1971
1972                 reply_descript_type = reply_desc->ReplyFlags &
1973                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1974
1975                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1976                         break;
1977         }
1978
1979         if (!num_completed)
1980                 return IRQ_NONE;
1981
1982         wmb();
1983         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1984                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
1985                 writel(((MSIxIndex & 0x7) << 24) |
1986                         fusion->last_reply_idx[MSIxIndex],
1987                         instance->reply_post_host_index_addr[MSIxIndex/8]);
1988         else
1989                 writel((MSIxIndex << 24) |
1990                         fusion->last_reply_idx[MSIxIndex],
1991                         instance->reply_post_host_index_addr[0]);
1992         megasas_check_and_restore_queue_depth(instance);
1993         return IRQ_HANDLED;
1994 }
1995
1996 /**
1997  * megasas_complete_cmd_dpc_fusion -    Completes command
1998  * @instance:                   Adapter soft state
1999  *
2000  * Tasklet to complete cmds
2001  */
2002 void
2003 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
2004 {
2005         struct megasas_instance *instance =
2006                 (struct megasas_instance *)instance_addr;
2007         unsigned long flags;
2008         u32 count, MSIxIndex;
2009
2010         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2011
2012         /* If we have already declared adapter dead, donot complete cmds */
2013         spin_lock_irqsave(&instance->hba_lock, flags);
2014         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2015                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2016                 return;
2017         }
2018         spin_unlock_irqrestore(&instance->hba_lock, flags);
2019
2020         for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
2021                 complete_cmd_fusion(instance, MSIxIndex);
2022 }
2023
2024 /**
2025  * megasas_isr_fusion - isr entry point
2026  */
2027 irqreturn_t megasas_isr_fusion(int irq, void *devp)
2028 {
2029         struct megasas_irq_context *irq_context = devp;
2030         struct megasas_instance *instance = irq_context->instance;
2031         u32 mfiStatus, fw_state;
2032
2033         if (instance->mask_interrupts)
2034                 return IRQ_NONE;
2035
2036         if (!instance->msix_vectors) {
2037                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
2038                 if (!mfiStatus)
2039                         return IRQ_NONE;
2040         }
2041
2042         /* If we are resetting, bail */
2043         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
2044                 instance->instancet->clear_intr(instance->reg_set);
2045                 return IRQ_HANDLED;
2046         }
2047
2048         if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
2049                 instance->instancet->clear_intr(instance->reg_set);
2050                 /* If we didn't complete any commands, check for FW fault */
2051                 fw_state = instance->instancet->read_fw_status_reg(
2052                         instance->reg_set) & MFI_STATE_MASK;
2053                 if (fw_state == MFI_STATE_FAULT) {
2054                         printk(KERN_WARNING "megaraid_sas: Iop2SysDoorbellInt"
2055                                "for scsi%d\n", instance->host->host_no);
2056                         schedule_work(&instance->work_init);
2057                 }
2058         }
2059
2060         return IRQ_HANDLED;
2061 }
2062
2063 /**
2064  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
2065  * @instance:                   Adapter soft state
2066  * mfi_cmd:                     megasas_cmd pointer
2067  *
2068  */
2069 u8
2070 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
2071                         struct megasas_cmd *mfi_cmd)
2072 {
2073         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
2074         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
2075         struct megasas_cmd_fusion *cmd;
2076         struct fusion_context *fusion;
2077         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
2078
2079         cmd = megasas_get_cmd_fusion(instance);
2080         if (!cmd)
2081                 return 1;
2082
2083         /*  Save the smid. To be used for returning the cmd */
2084         mfi_cmd->context.smid = cmd->index;
2085
2086         cmd->sync_cmd_idx = mfi_cmd->index;
2087
2088         /*
2089          * For cmds where the flag is set, store the flag and check
2090          * on completion. For cmds with this flag, don't call
2091          * megasas_complete_cmd
2092          */
2093
2094         if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
2095                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
2096
2097         fusion = instance->ctrl_context;
2098         io_req = cmd->io_request;
2099
2100         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2101                 (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
2102                 struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
2103                         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
2104                 sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
2105                 sgl_ptr_end->Flags = 0;
2106         }
2107
2108         mpi25_ieee_chain =
2109           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
2110
2111         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
2112         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
2113                                        SGL) / 4;
2114         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
2115
2116         mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
2117
2118         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
2119                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
2120
2121         mpi25_ieee_chain->Length = cpu_to_le32(MEGASAS_MAX_SZ_CHAIN_FRAME);
2122
2123         return 0;
2124 }
2125
2126 /**
2127  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
2128  * @instance:                   Adapter soft state
2129  * @cmd:                        mfi cmd to build
2130  *
2131  */
2132 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
2133 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
2134 {
2135         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2136         u16 index;
2137
2138         if (build_mpt_mfi_pass_thru(instance, cmd)) {
2139                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
2140                 return NULL;
2141         }
2142
2143         index = cmd->context.smid;
2144
2145         req_desc = megasas_get_request_descriptor(instance, index - 1);
2146
2147         if (!req_desc)
2148                 return NULL;
2149
2150         req_desc->Words = 0;
2151         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
2152                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
2153
2154         req_desc->SCSIIO.SMID = cpu_to_le16(index);
2155
2156         return req_desc;
2157 }
2158
2159 /**
2160  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
2161  * @instance:                   Adapter soft state
2162  * @cmd:                        mfi cmd pointer
2163  *
2164  */
2165 void
2166 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
2167                           struct megasas_cmd *cmd)
2168 {
2169         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2170
2171         req_desc = build_mpt_cmd(instance, cmd);
2172         if (!req_desc) {
2173                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
2174                 return;
2175         }
2176         instance->instancet->fire_cmd(instance, req_desc->u.low,
2177                                       req_desc->u.high, instance->reg_set);
2178 }
2179
2180 /**
2181  * megasas_release_fusion -     Reverses the FW initialization
2182  * @intance:                    Adapter soft state
2183  */
2184 void
2185 megasas_release_fusion(struct megasas_instance *instance)
2186 {
2187         megasas_free_cmds(instance);
2188         megasas_free_cmds_fusion(instance);
2189
2190         iounmap(instance->reg_set);
2191
2192         pci_release_selected_regions(instance->pdev, instance->bar);
2193 }
2194
2195 /**
2196  * megasas_read_fw_status_reg_fusion - returns the current FW status value
2197  * @regs:                       MFI register set
2198  */
2199 static u32
2200 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
2201 {
2202         return readl(&(regs)->outbound_scratch_pad);
2203 }
2204
2205 /**
2206  * megasas_adp_reset_fusion -   For controller reset
2207  * @regs:                               MFI register set
2208  */
2209 static int
2210 megasas_adp_reset_fusion(struct megasas_instance *instance,
2211                          struct megasas_register_set __iomem *regs)
2212 {
2213         return 0;
2214 }
2215
2216 /**
2217  * megasas_check_reset_fusion - For controller reset check
2218  * @regs:                               MFI register set
2219  */
2220 static int
2221 megasas_check_reset_fusion(struct megasas_instance *instance,
2222                            struct megasas_register_set __iomem *regs)
2223 {
2224         return 0;
2225 }
2226
2227 /* This function waits for outstanding commands on fusion to complete */
2228 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
2229                                         int iotimeout, int *convert)
2230 {
2231         int i, outstanding, retval = 0, hb_seconds_missed = 0;
2232         u32 fw_state;
2233
2234         for (i = 0; i < resetwaittime; i++) {
2235                 /* Check if firmware is in fault state */
2236                 fw_state = instance->instancet->read_fw_status_reg(
2237                         instance->reg_set) & MFI_STATE_MASK;
2238                 if (fw_state == MFI_STATE_FAULT) {
2239                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
2240                                " will reset adapter scsi%d.\n",
2241                                 instance->host->host_no);
2242                         retval = 1;
2243                         goto out;
2244                 }
2245                 /* If SR-IOV VF mode & heartbeat timeout, don't wait */
2246                 if (instance->requestorId && !iotimeout) {
2247                         retval = 1;
2248                         goto out;
2249                 }
2250
2251                 /* If SR-IOV VF mode & I/O timeout, check for HB timeout */
2252                 if (instance->requestorId && iotimeout) {
2253                         if (instance->hb_host_mem->HB.fwCounter !=
2254                             instance->hb_host_mem->HB.driverCounter) {
2255                                 instance->hb_host_mem->HB.driverCounter =
2256                                         instance->hb_host_mem->HB.fwCounter;
2257                                 hb_seconds_missed = 0;
2258                         } else {
2259                                 hb_seconds_missed++;
2260                                 if (hb_seconds_missed ==
2261                                     (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
2262                                         printk(KERN_WARNING "megasas: SR-IOV:"
2263                                                " Heartbeat never completed "
2264                                                " while polling during I/O "
2265                                                " timeout handling for "
2266                                                "scsi%d.\n",
2267                                                instance->host->host_no);
2268                                                *convert = 1;
2269                                                retval = 1;
2270                                                goto out;
2271                                 }
2272                         }
2273                 }
2274
2275                 outstanding = atomic_read(&instance->fw_outstanding);
2276                 if (!outstanding)
2277                         goto out;
2278
2279                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2280                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2281                                "commands to complete for scsi%d\n", i,
2282                                outstanding, instance->host->host_no);
2283                         megasas_complete_cmd_dpc_fusion(
2284                                 (unsigned long)instance);
2285                 }
2286                 msleep(1000);
2287         }
2288
2289         if (atomic_read(&instance->fw_outstanding)) {
2290                 printk("megaraid_sas: pending commands remain after waiting, "
2291                        "will reset adapter scsi%d.\n",
2292                        instance->host->host_no);
2293                 retval = 1;
2294         }
2295 out:
2296         return retval;
2297 }
2298
2299 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2300 {
2301         int i, count;
2302         struct fusion_context *fusion;
2303         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2304
2305         fusion = instance->ctrl_context;
2306         count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
2307         for (i = 0 ; i < count ; i++)
2308                 fusion->last_reply_idx[i] = 0;
2309         reply_desc = fusion->reply_frames_desc;
2310         for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
2311                 reply_desc->Words = ULLONG_MAX;
2312 }
2313
2314 /* Check for a second path that is currently UP */
2315 int megasas_check_mpio_paths(struct megasas_instance *instance,
2316         struct scsi_cmnd *scmd)
2317 {
2318         int i, j, retval = (DID_RESET << 16);
2319
2320         if (instance->mpio && instance->requestorId) {
2321                 for (i = 0 ; i < MAX_MGMT_ADAPTERS ; i++)
2322                         for (j = 0 ; j < MAX_LOGICAL_DRIVES; j++)
2323                                 if (megasas_mgmt_info.instance[i] &&
2324                                     (megasas_mgmt_info.instance[i] != instance) &&
2325                                     megasas_mgmt_info.instance[i]->mpio &&
2326                                     megasas_mgmt_info.instance[i]->requestorId
2327                                     &&
2328                                     (megasas_mgmt_info.instance[i]->ld_ids[j]
2329                                      == scmd->device->id)) {
2330                                             retval = (DID_NO_CONNECT << 16);
2331                                             goto out;
2332                                 }
2333         }
2334 out:
2335         return retval;
2336 }
2337
2338 /* Core fusion reset function */
2339 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
2340 {
2341         int retval = SUCCESS, i, j, retry = 0, convert = 0;
2342         struct megasas_instance *instance;
2343         struct megasas_cmd_fusion *cmd_fusion;
2344         struct fusion_context *fusion;
2345         struct megasas_cmd *cmd_mfi;
2346         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2347         u32 host_diag, abs_state, status_reg, reset_adapter;
2348
2349         instance = (struct megasas_instance *)shost->hostdata;
2350         fusion = instance->ctrl_context;
2351
2352         mutex_lock(&instance->reset_mutex);
2353
2354         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2355                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2356                        "returning FAILED for scsi%d.\n",
2357                         instance->host->host_no);
2358                 return FAILED;
2359         }
2360
2361         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
2362                 del_timer_sync(&instance->sriov_heartbeat_timer);
2363         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2364         instance->adprecovery = MEGASAS_ADPRESET_SM_POLLING;
2365         instance->instancet->disable_intr(instance);
2366         msleep(1000);
2367
2368         /* First try waiting for commands to complete */
2369         if (megasas_wait_for_outstanding_fusion(instance, iotimeout,
2370                                                 &convert)) {
2371                 instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2372                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2373                        "adapter scsi%d.\n", instance->host->host_no);
2374                 if (convert)
2375                         iotimeout = 0;
2376
2377                 /* Now return commands back to the OS */
2378                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2379                         cmd_fusion = fusion->cmd_list[i];
2380                         if (cmd_fusion->scmd) {
2381                                 scsi_dma_unmap(cmd_fusion->scmd);
2382                                 cmd_fusion->scmd->result =
2383                                         megasas_check_mpio_paths(instance,
2384                                                                  cmd_fusion->scmd);
2385                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2386                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2387                                 atomic_dec(&instance->fw_outstanding);
2388                         }
2389                 }
2390
2391                 status_reg = instance->instancet->read_fw_status_reg(
2392                         instance->reg_set);
2393                 abs_state = status_reg & MFI_STATE_MASK;
2394                 reset_adapter = status_reg & MFI_RESET_ADAPTER;
2395                 if (instance->disableOnlineCtrlReset ||
2396                     (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
2397                         /* Reset not supported, kill adapter */
2398                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2399                                ", killing adapter scsi%d.\n",
2400                                 instance->host->host_no);
2401                         megaraid_sas_kill_hba(instance);
2402                         instance->skip_heartbeat_timer_del = 1;
2403                         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2404                         retval = FAILED;
2405                         goto out;
2406                 }
2407
2408                 /* Let SR-IOV VF & PF sync up if there was a HB failure */
2409                 if (instance->requestorId && !iotimeout) {
2410                         msleep(MEGASAS_OCR_SETTLE_TIME_VF);
2411                         /* Look for a late HB update after VF settle time */
2412                         if (abs_state == MFI_STATE_OPERATIONAL &&
2413                             (instance->hb_host_mem->HB.fwCounter !=
2414                              instance->hb_host_mem->HB.driverCounter)) {
2415                                         instance->hb_host_mem->HB.driverCounter =
2416                                                 instance->hb_host_mem->HB.fwCounter;
2417                                         printk(KERN_WARNING "megasas: SR-IOV:"
2418                                                "Late FW heartbeat update for "
2419                                                "scsi%d.\n",
2420                                                instance->host->host_no);
2421                         } else {
2422                                 /* In VF mode, first poll for FW ready */
2423                                 for (i = 0;
2424                                      i < (MEGASAS_RESET_WAIT_TIME * 1000);
2425                                      i += 20) {
2426                                         status_reg =
2427                                                 instance->instancet->
2428                                                 read_fw_status_reg(
2429                                                         instance->reg_set);
2430                                         abs_state = status_reg &
2431                                                 MFI_STATE_MASK;
2432                                         if (abs_state == MFI_STATE_READY) {
2433                                                 printk(KERN_WARNING "megasas"
2434                                                        ": SR-IOV: FW was found"
2435                                                        "to be in ready state "
2436                                                        "for scsi%d.\n",
2437                                                        instance->host->host_no);
2438                                                 break;
2439                                         }
2440                                         msleep(20);
2441                                 }
2442                                 if (abs_state != MFI_STATE_READY) {
2443                                         printk(KERN_WARNING "megasas: SR-IOV: "
2444                                                "FW not in ready state after %d"
2445                                                " seconds for scsi%d, status_reg = "
2446                                                "0x%x.\n",
2447                                                MEGASAS_RESET_WAIT_TIME,
2448                                                instance->host->host_no,
2449                                                status_reg);
2450                                         megaraid_sas_kill_hba(instance);
2451                                         instance->skip_heartbeat_timer_del = 1;
2452                                         instance->adprecovery =
2453                                                 MEGASAS_HW_CRITICAL_ERROR;
2454                                         retval = FAILED;
2455                                         goto out;
2456                                 }
2457                         }
2458                 }
2459
2460                 /* Now try to reset the chip */
2461                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2462                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2463                                &instance->reg_set->fusion_seq_offset);
2464                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2465                                &instance->reg_set->fusion_seq_offset);
2466                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2467                                &instance->reg_set->fusion_seq_offset);
2468                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2469                                &instance->reg_set->fusion_seq_offset);
2470                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2471                                &instance->reg_set->fusion_seq_offset);
2472                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2473                                &instance->reg_set->fusion_seq_offset);
2474                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2475                                &instance->reg_set->fusion_seq_offset);
2476
2477                         /* Check that the diag write enable (DRWE) bit is on */
2478                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2479                         retry = 0;
2480                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2481                                 msleep(100);
2482                                 host_diag =
2483                                 readl(&instance->reg_set->fusion_host_diag);
2484                                 if (retry++ == 100) {
2485                                         printk(KERN_WARNING "megaraid_sas: "
2486                                                "Host diag unlock failed! "
2487                                                "for scsi%d\n",
2488                                                 instance->host->host_no);
2489                                         break;
2490                                 }
2491                         }
2492                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2493                                 continue;
2494
2495                         /* Send chip reset command */
2496                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2497                                &instance->reg_set->fusion_host_diag);
2498                         msleep(3000);
2499
2500                         /* Make sure reset adapter bit is cleared */
2501                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2502                         retry = 0;
2503                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2504                                 msleep(100);
2505                                 host_diag =
2506                                 readl(&instance->reg_set->fusion_host_diag);
2507                                 if (retry++ == 1000) {
2508                                         printk(KERN_WARNING "megaraid_sas: "
2509                                                "Diag reset adapter never "
2510                                                "cleared for scsi%d!\n",
2511                                                 instance->host->host_no);
2512                                         break;
2513                                 }
2514                         }
2515                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2516                                 continue;
2517
2518                         abs_state =
2519                                 instance->instancet->read_fw_status_reg(
2520                                         instance->reg_set) & MFI_STATE_MASK;
2521                         retry = 0;
2522
2523                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2524                                (retry++ < 1000)) {
2525                                 msleep(100);
2526                                 abs_state =
2527                                 instance->instancet->read_fw_status_reg(
2528                                         instance->reg_set) & MFI_STATE_MASK;
2529                         }
2530                         if (abs_state <= MFI_STATE_FW_INIT) {
2531                                 printk(KERN_WARNING "megaraid_sas: firmware "
2532                                        "state < MFI_STATE_FW_INIT, state = "
2533                                        "0x%x for scsi%d\n", abs_state,
2534                                         instance->host->host_no);
2535                                 continue;
2536                         }
2537
2538                         /* Wait for FW to become ready */
2539                         if (megasas_transition_to_ready(instance, 1)) {
2540                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2541                                        "transition controller to ready "
2542                                        "for scsi%d.\n",
2543                                        instance->host->host_no);
2544                                 continue;
2545                         }
2546
2547                         megasas_reset_reply_desc(instance);
2548                         if (megasas_ioc_init_fusion(instance)) {
2549                                 printk(KERN_WARNING "megaraid_sas: "
2550                                        "megasas_ioc_init_fusion() failed!"
2551                                        " for scsi%d\n",
2552                                        instance->host->host_no);
2553                                 continue;
2554                         }
2555
2556                         /* Re-fire management commands */
2557                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2558                                 cmd_fusion = fusion->cmd_list[j];
2559                                 if (cmd_fusion->sync_cmd_idx !=
2560                                     (u32)ULONG_MAX) {
2561                                         cmd_mfi =
2562                                         instance->
2563                                         cmd_list[cmd_fusion->sync_cmd_idx];
2564                                         if (cmd_mfi->frame->dcmd.opcode ==
2565                                             cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) {
2566                                                 megasas_return_cmd(instance,
2567                                                                    cmd_mfi);
2568                                                 megasas_return_cmd_fusion(
2569                                                         instance, cmd_fusion);
2570                                         } else  {
2571                                                 req_desc =
2572                                                 megasas_get_request_descriptor(
2573                                                         instance,
2574                                                         cmd_mfi->context.smid
2575                                                         -1);
2576                                                 if (!req_desc) {
2577                                                         printk(KERN_WARNING
2578                                                                "req_desc NULL"
2579                                                                " for scsi%d\n",
2580                                                                 instance->host->host_no);
2581                                                         /* Return leaked MPT
2582                                                            frame */
2583                                                         megasas_return_cmd_fusion(instance, cmd_fusion);
2584                                                 } else {
2585                                                         instance->instancet->
2586                                                         fire_cmd(instance,
2587                                                                  req_desc->
2588                                                                  u.low,
2589                                                                  req_desc->
2590                                                                  u.high,
2591                                                                  instance->
2592                                                                  reg_set);
2593                                                 }
2594                                         }
2595                                 }
2596                         }
2597
2598                         clear_bit(MEGASAS_FUSION_IN_RESET,
2599                                   &instance->reset_flags);
2600                         instance->instancet->enable_intr(instance);
2601                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2602
2603                         /* Reset load balance info */
2604                         memset(fusion->load_balance_info, 0,
2605                                sizeof(struct LD_LOAD_BALANCE_INFO)
2606                                *MAX_LOGICAL_DRIVES);
2607
2608                         if (!megasas_get_map_info(instance))
2609                                 megasas_sync_map_info(instance);
2610
2611                         /* Restart SR-IOV heartbeat */
2612                         if (instance->requestorId) {
2613                                 if (!megasas_sriov_start_heartbeat(instance, 0))
2614                                         megasas_start_timer(instance,
2615                                                             &instance->sriov_heartbeat_timer,
2616                                                             megasas_sriov_heartbeat_handler,
2617                                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2618                                 else
2619                                         instance->skip_heartbeat_timer_del = 1;
2620                         }
2621
2622                         /* Adapter reset completed successfully */
2623                         printk(KERN_WARNING "megaraid_sas: Reset "
2624                                "successful for scsi%d.\n",
2625                                 instance->host->host_no);
2626                         retval = SUCCESS;
2627                         goto out;
2628                 }
2629                 /* Reset failed, kill the adapter */
2630                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2631                        "adapter scsi%d.\n", instance->host->host_no);
2632                 megaraid_sas_kill_hba(instance);
2633                 instance->skip_heartbeat_timer_del = 1;
2634                 instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2635                 retval = FAILED;
2636         } else {
2637                 /* For VF: Restart HB timer if we didn't OCR */
2638                 if (instance->requestorId) {
2639                         megasas_start_timer(instance,
2640                                             &instance->sriov_heartbeat_timer,
2641                                             megasas_sriov_heartbeat_handler,
2642                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2643                 }
2644                 clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2645                 instance->instancet->enable_intr(instance);
2646                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2647         }
2648 out:
2649         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2650         mutex_unlock(&instance->reset_mutex);
2651         return retval;
2652 }
2653
2654 /* Fusion OCR work queue */
2655 void megasas_fusion_ocr_wq(struct work_struct *work)
2656 {
2657         struct megasas_instance *instance =
2658                 container_of(work, struct megasas_instance, work_init);
2659
2660         megasas_reset_fusion(instance->host, 0);
2661 }
2662
2663 struct megasas_instance_template megasas_instance_template_fusion = {
2664         .fire_cmd = megasas_fire_cmd_fusion,
2665         .enable_intr = megasas_enable_intr_fusion,
2666         .disable_intr = megasas_disable_intr_fusion,
2667         .clear_intr = megasas_clear_intr_fusion,
2668         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2669         .adp_reset = megasas_adp_reset_fusion,
2670         .check_reset = megasas_check_reset_fusion,
2671         .service_isr = megasas_isr_fusion,
2672         .tasklet = megasas_complete_cmd_dpc_fusion,
2673         .init_adapter = megasas_init_adapter_fusion,
2674         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2675         .issue_dcmd = megasas_issue_dcmd_fusion,
2676 };