sys/dev/smartpqi/smartpqi_request.c

   1 /*-
   2  * Copyright (c) 2018 Microsemi Corporation.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 /* $FreeBSD$ */
  28
  29 #include "smartpqi_includes.h"
  30
  31 #define SG_FLAG_LAST    0x40000000
  32 #define SG_FLAG_CHAIN   0x80000000
  33
  34 /* Subroutine to find out embedded sgl count in IU */
  35 static inline
  36 uint32_t pqisrc_embedded_sgl_count(uint32_t elem_alloted)
  37 {
  38         uint32_t embedded_sgl_count = MAX_EMBEDDED_SG_IN_FIRST_IU;
  39         DBG_FUNC(" IN ");
  40         /**
  41         calculate embedded sgl count using num_elem_alloted for IO
  42         **/
  43         if(elem_alloted - 1)
  44                 embedded_sgl_count += ((elem_alloted - 1) * MAX_EMBEDDED_SG_IN_IU);
  45         DBG_IO("embedded_sgl_count :%d\n",embedded_sgl_count);
  46
  47         DBG_FUNC(" OUT ");
  48
  49         return embedded_sgl_count;
  50
  51 }
  52
  53 /* Subroutine to find out contiguous free elem in IU */
  54 static inline
  55 uint32_t pqisrc_contiguous_free_elem(uint32_t pi, uint32_t ci, uint32_t elem_in_q)
  56 {
  57         uint32_t contiguous_free_elem = 0;
  58
  59         DBG_FUNC(" IN ");
  60
  61         if(pi >= ci) {
  62                 contiguous_free_elem = (elem_in_q - pi);
  63                 if(ci == 0)
  64                         contiguous_free_elem -= 1;
  65         } else {
  66                 contiguous_free_elem = (ci - pi - 1);
  67         }
  68
  69         DBG_FUNC(" OUT ");
  70
  71         return contiguous_free_elem;
  72 }
  73
  74 /* Subroutine to find out num of elements need for the request */
  75 static uint32_t
  76 pqisrc_num_elem_needed(pqisrc_softstate_t *softs, uint32_t SG_Count)
  77 {
  78         uint32_t num_sg;
  79         uint32_t num_elem_required = 1;
  80         DBG_FUNC(" IN ");
  81         DBG_IO("SGL_Count :%d",SG_Count);
  82         /********
  83         If SG_Count greater than max sg per IU i.e 4 or 68
  84         (4 is with out spanning or 68 is with spanning) chaining is required.
  85         OR, If SG_Count <= MAX_EMBEDDED_SG_IN_FIRST_IU then,
  86         on these two cases one element is enough.
  87         ********/
  88         if(SG_Count > softs->max_sg_per_iu || SG_Count <= MAX_EMBEDDED_SG_IN_FIRST_IU)
  89                 return num_elem_required;
  90         /*
  91         SGL Count Other Than First IU
  92          */
  93         num_sg = SG_Count - MAX_EMBEDDED_SG_IN_FIRST_IU;
  94         num_elem_required += PQISRC_DIV_ROUND_UP(num_sg, MAX_EMBEDDED_SG_IN_IU);
  95         DBG_FUNC(" OUT ");
  96         return num_elem_required;
  97 }
  98
  99 /* Subroutine to build SG list for the IU submission*/
 100 static
 101 boolean_t pqisrc_build_sgl(sgt_t *sg_array, rcb_t *rcb, iu_header_t *iu_hdr,
 102                         uint32_t num_elem_alloted)
 103 {
 104         uint32_t i;
 105         uint32_t num_sg = OS_GET_IO_SG_COUNT(rcb);
 106         sgt_t *sgt = sg_array;
 107         sgt_t *sg_chain = NULL;
 108         boolean_t partial = false;
 109
 110         DBG_FUNC(" IN ");
 111
 112         DBG_IO("SGL_Count :%d",num_sg);
 113         if (0 == num_sg) {
 114                 goto out;
 115         }
 116
 117         if (num_sg <= pqisrc_embedded_sgl_count(num_elem_alloted)) {
 118                 for (i = 0; i < num_sg; i++, sgt++) {
 119                         sgt->addr= OS_GET_IO_SG_ADDR(rcb,i);
 120                         sgt->len= OS_GET_IO_SG_LEN(rcb,i);
 121                         sgt->flags= 0;
 122                 }
 123
 124                 sg_array[num_sg - 1].flags = SG_FLAG_LAST;
 125         } else {
 126         /**
 127         SGL Chaining
 128         **/
 129                 sg_chain = rcb->sg_chain_virt;
 130                 sgt->addr = rcb->sg_chain_dma;
 131                 sgt->len = num_sg * sizeof(sgt_t);
 132                 sgt->flags = SG_FLAG_CHAIN;
 133
 134                 sgt = sg_chain;
 135                 for (i = 0; i < num_sg; i++, sgt++) {
 136                         sgt->addr = OS_GET_IO_SG_ADDR(rcb,i);
 137                         sgt->len = OS_GET_IO_SG_LEN(rcb,i);
 138                         sgt->flags = 0;
 139                 }
 140
 141                 sg_chain[num_sg - 1].flags = SG_FLAG_LAST;
 142                 num_sg = 1;
 143                 partial = true;
 144
 145         }
 146 out:
 147         iu_hdr->iu_length = num_sg * sizeof(sgt_t);
 148         DBG_FUNC(" OUT ");
 149         return partial;
 150
 151 }
 152
 153 /*Subroutine used to Build the RAID request */
 154 static void
 155 pqisrc_build_raid_io(pqisrc_softstate_t *softs, rcb_t *rcb,
 156         pqisrc_raid_req_t *raid_req, uint32_t num_elem_alloted)
 157 {
 158         DBG_FUNC(" IN ");
 159
 160         raid_req->header.iu_type = PQI_IU_TYPE_RAID_PATH_IO_REQUEST;
 161         raid_req->header.comp_feature = 0;
 162         raid_req->response_queue_id = OS_GET_IO_RESP_QID(softs, rcb);
 163         raid_req->work_area[0] = 0;
 164         raid_req->work_area[1] = 0;
 165         raid_req->request_id = rcb->tag;
 166         raid_req->nexus_id = 0;
 167         raid_req->buffer_length = GET_SCSI_BUFFLEN(rcb);
 168         memcpy(raid_req->lun_number, rcb->dvp->scsi3addr,
 169                 sizeof(raid_req->lun_number));
 170         raid_req->protocol_spec = 0;
 171         raid_req->data_direction = rcb->data_dir;
 172         raid_req->reserved1 = 0;
 173         raid_req->fence = 0;
 174         raid_req->error_index = raid_req->request_id;
 175         raid_req->reserved2 = 0;
 176         raid_req->task_attribute = OS_GET_TASK_ATTR(rcb);
 177         raid_req->command_priority = 0;
 178         raid_req->reserved3 = 0;
 179         raid_req->reserved4 = 0;
 180         raid_req->reserved5 = 0;
 181
 182         /* As cdb and additional_cdb_bytes are contiguous,
 183            update them in a single statement */
 184         memcpy(raid_req->cdb, rcb->cdbp, rcb->cmdlen);
 185 #if 0
 186         DBG_IO("CDB :");
 187         for(i = 0; i < rcb->cmdlen ; i++)
 188                 DBG_IO(" 0x%x \n ",raid_req->cdb[i]);
 189 #endif
 190
 191         switch (rcb->cmdlen) {
 192                 case 6:
 193                 case 10:
 194                 case 12:
 195                 case 16:
 196                         raid_req->additional_cdb_bytes_usage =
 197                                 PQI_ADDITIONAL_CDB_BYTES_0;
 198                         break;
 199                 case 20:
 200                         raid_req->additional_cdb_bytes_usage =
 201                                 PQI_ADDITIONAL_CDB_BYTES_4;
 202                         break;
 203                 case 24:
 204                         raid_req->additional_cdb_bytes_usage =
 205                                 PQI_ADDITIONAL_CDB_BYTES_8;
 206                         break;
 207                 case 28:
 208                         raid_req->additional_cdb_bytes_usage =
 209                                 PQI_ADDITIONAL_CDB_BYTES_12;
 210                         break;
 211                 case 32:
 212                 default: /* todo:review again */
 213                         raid_req->additional_cdb_bytes_usage =
 214                                 PQI_ADDITIONAL_CDB_BYTES_16;
 215                         break;
 216         }
 217
 218         /* Frame SGL Descriptor */
 219         raid_req->partial = pqisrc_build_sgl(&raid_req->sg_descriptors[0], rcb,
 220                 &raid_req->header, num_elem_alloted);
 221
 222         raid_req->header.iu_length +=
 223                         offsetof(pqisrc_raid_req_t, sg_descriptors) - sizeof(iu_header_t);
 224
 225 #if 0
 226         DBG_IO("raid_req->header.iu_type : 0x%x", raid_req->header.iu_type);
 227         DBG_IO("raid_req->response_queue_id :%d\n"raid_req->response_queue_id);
 228         DBG_IO("raid_req->request_id : 0x%x", raid_req->request_id);
 229         DBG_IO("raid_req->buffer_length : 0x%x", raid_req->buffer_length);
 230         DBG_IO("raid_req->task_attribute : 0x%x", raid_req->task_attribute);
 231         DBG_IO("raid_req->lun_number  : 0x%x", raid_req->lun_number);
 232         DBG_IO("raid_req->error_index : 0x%x", raid_req->error_index);
 233         DBG_IO("raid_req->sg_descriptors[0].addr : %p", (void*)raid_req->sg_descriptors[0].addr);
 234         DBG_IO("raid_req->sg_descriptors[0].len : 0x%x", raid_req->sg_descriptors[0].len);
 235         DBG_IO("raid_req->sg_descriptors[0].flags : 0%x", raid_req->sg_descriptors[0].flags);
 236 #endif
 237         rcb->success_cmp_callback = pqisrc_process_io_response_success;
 238         rcb->error_cmp_callback = pqisrc_process_raid_response_error;
 239         rcb->resp_qid = raid_req->response_queue_id;
 240
 241         DBG_FUNC(" OUT ");
 242
 243 }
 244
 245 /*Subroutine used to Build the AIO request */
 246 static void
 247 pqisrc_build_aio_io(pqisrc_softstate_t *softs, rcb_t *rcb,
 248                                 pqi_aio_req_t *aio_req, uint32_t num_elem_alloted)
 249 {
 250         DBG_FUNC(" IN ");
 251
 252         aio_req->header.iu_type = PQI_IU_TYPE_AIO_PATH_IO_REQUEST;
 253         aio_req->header.comp_feature = 0;
 254         aio_req->response_queue_id = OS_GET_IO_RESP_QID(softs, rcb);
 255         aio_req->work_area[0] = 0;
 256         aio_req->work_area[1] = 0;
 257         aio_req->req_id = rcb->tag;
 258         aio_req->res1[0] = 0;
 259         aio_req->res1[1] = 0;
 260         aio_req->nexus = rcb->ioaccel_handle;
 261         aio_req->buf_len = GET_SCSI_BUFFLEN(rcb);
 262         aio_req->data_dir = rcb->data_dir;
 263         aio_req->mem_type = 0;
 264         aio_req->fence = 0;
 265         aio_req->res2 = 0;
 266         aio_req->task_attr = OS_GET_TASK_ATTR(rcb);
 267         aio_req->cmd_prio = 0;
 268         aio_req->res3 = 0;
 269         aio_req->err_idx = aio_req->req_id;
 270         aio_req->cdb_len = rcb->cmdlen;
 271         memcpy(aio_req->cdb, rcb->cdbp, rcb->cmdlen);
 272 #if 0
 273         DBG_IO("CDB : \n");
 274         for(int i = 0; i < rcb->cmdlen ; i++)
 275                  DBG_IO(" 0x%x \n",aio_req->cdb[i]);
 276 #endif
 277         memset(aio_req->lun,0,sizeof(aio_req->lun));
 278         memset(aio_req->res4,0,sizeof(aio_req->res4));
 279
 280         if(rcb->encrypt_enable == true) {
 281                 aio_req->encrypt_enable = true;
 282                 aio_req->encrypt_key_index = LE_16(rcb->enc_info.data_enc_key_index);
 283                 aio_req->encrypt_twk_low = LE_32(rcb->enc_info.encrypt_tweak_lower);
 284                 aio_req->encrypt_twk_high = LE_32(rcb->enc_info.encrypt_tweak_upper);
 285         } else {
 286                 aio_req->encrypt_enable = 0;
 287                 aio_req->encrypt_key_index = 0;
 288                 aio_req->encrypt_twk_high = 0;
 289                 aio_req->encrypt_twk_low = 0;
 290         }
 291
 292         /* Frame SGL Descriptor */
 293         aio_req->partial = pqisrc_build_sgl(&aio_req->sg_desc[0], rcb,
 294                 &aio_req->header, num_elem_alloted);
 295
 296         aio_req->num_sg = aio_req->header.iu_length / sizeof(sgt_t);
 297
 298         DBG_INFO("aio_req->num_sg :%d",aio_req->num_sg);
 299
 300         aio_req->header.iu_length += offsetof(pqi_aio_req_t, sg_desc) -
 301                 sizeof(iu_header_t);
 302 #if 0
 303         DBG_IO("aio_req->header.iu_type : 0x%x \n",aio_req->header.iu_type);
 304         DBG_IO("aio_req->resp_qid :0x%x",aio_req->resp_qid);
 305         DBG_IO("aio_req->req_id : 0x%x \n",aio_req->req_id);
 306         DBG_IO("aio_req->nexus : 0x%x  \n",aio_req->nexus);
 307         DBG_IO("aio_req->buf_len : 0x%x \n",aio_req->buf_len);
 308         DBG_IO("aio_req->data_dir : 0x%x \n",aio_req->data_dir);
 309         DBG_IO("aio_req->task_attr : 0x%x \n",aio_req->task_attr);
 310         DBG_IO("aio_req->err_idx : 0x%x \n",aio_req->err_idx);
 311         DBG_IO("aio_req->num_sg :%d",aio_req->num_sg);
 312         DBG_IO("aio_req->sg_desc[0].addr : %p \n", (void*)aio_req->sg_desc[0].addr);
 313         DBG_IO("aio_req->sg_desc[0].len : 0%x \n", aio_req->sg_desc[0].len);
 314         DBG_IO("aio_req->sg_desc[0].flags : 0%x \n", aio_req->sg_desc[0].flags);
 315 #endif
 316
 317         rcb->success_cmp_callback = pqisrc_process_io_response_success;
 318         rcb->error_cmp_callback = pqisrc_process_aio_response_error;
 319         rcb->resp_qid = aio_req->response_queue_id;
 320
 321         DBG_FUNC(" OUT ");
 322
 323 }
 324
 325 /*Function used to build and send RAID/AIO */
 326 int pqisrc_build_send_io(pqisrc_softstate_t *softs,rcb_t *rcb)
 327 {
 328         ib_queue_t *ib_q_array = softs->op_aio_ib_q;
 329         ib_queue_t *ib_q = NULL;
 330         char *ib_iu = NULL;
 331         IO_PATH_T io_path = AIO_PATH;
 332         uint32_t TraverseCount = 0;
 333         int first_qindex = OS_GET_IO_REQ_QINDEX(softs, rcb);
 334         int qindex = first_qindex;
 335         uint32_t num_op_ib_q = softs->num_op_aio_ibq;
 336         uint32_t num_elem_needed;
 337         uint32_t num_elem_alloted = 0;
 338         pqi_scsi_dev_t *devp = rcb->dvp;
 339         uint8_t raidbypass_cdb[16];
 340
 341         DBG_FUNC(" IN ");
 342
 343
 344         rcb->cdbp = OS_GET_CDBP(rcb);
 345
 346         if(IS_AIO_PATH(devp)) {
 347                 /**  IO for Physical Drive  **/
 348                 /** Send in AIO PATH**/
 349                 rcb->ioaccel_handle = devp->ioaccel_handle;
 350         } else {
 351                 int ret = PQI_STATUS_FAILURE;
 352                 /** IO for RAID Volume **/
 353                 if (devp->offload_enabled) {
 354                         /** ByPass IO ,Send in AIO PATH **/
 355                         ret = pqisrc_send_scsi_cmd_raidbypass(softs,
 356                                 devp, rcb, raidbypass_cdb);
 357                 }
 358
 359                 if (PQI_STATUS_FAILURE == ret) {
 360                         /** Send in RAID PATH **/
 361                         io_path = RAID_PATH;
 362                         num_op_ib_q = softs->num_op_raid_ibq;
 363                         ib_q_array = softs->op_raid_ib_q;
 364                 } else {
 365                         rcb->cdbp = raidbypass_cdb;
 366                 }
 367         }
 368
 369         num_elem_needed = pqisrc_num_elem_needed(softs, OS_GET_IO_SG_COUNT(rcb));
 370         DBG_IO("num_elem_needed :%d",num_elem_needed);
 371
 372         do {
 373                 uint32_t num_elem_available;
 374                 ib_q = (ib_q_array + qindex);
 375                 PQI_LOCK(&ib_q->lock);
 376                 num_elem_available = pqisrc_contiguous_free_elem(ib_q->pi_local,
 377                                         *(ib_q->ci_virt_addr), ib_q->num_elem);
 378
 379                 DBG_IO("num_elem_avialable :%d\n",num_elem_available);
 380                 if(num_elem_available >= num_elem_needed) {
 381                         num_elem_alloted = num_elem_needed;
 382                         break;
 383                 }
 384                 DBG_IO("Current queue is busy! Hop to next queue\n");
 385
 386                 PQI_UNLOCK(&ib_q->lock);
 387                 qindex = (qindex + 1) % num_op_ib_q;
 388                 if(qindex == first_qindex) {
 389                         if (num_elem_needed == 1)
 390                                 break;
 391                         TraverseCount += 1;
 392                         num_elem_needed = 1;
 393                 }
 394         }while(TraverseCount < 2);
 395
 396         DBG_IO("num_elem_alloted :%d",num_elem_alloted);
 397         if (num_elem_alloted == 0) {
 398                 DBG_WARN("OUT: IB Queues were full\n");
 399                 return PQI_STATUS_QFULL;
 400         }
 401
 402         /* Get IB Queue Slot address to build IU */
 403         ib_iu = ib_q->array_virt_addr + (ib_q->pi_local * ib_q->elem_size);
 404
 405         if(io_path == AIO_PATH) {
 406                 /** Build AIO structure **/
 407                 pqisrc_build_aio_io(softs, rcb, (pqi_aio_req_t*)ib_iu,
 408                         num_elem_alloted);
 409         } else {
 410                 /** Build RAID structure **/
 411                 pqisrc_build_raid_io(softs, rcb, (pqisrc_raid_req_t*)ib_iu,
 412                         num_elem_alloted);
 413         }
 414
 415         rcb->req_pending = true;
 416
 417         /* Update the local PI */
 418         ib_q->pi_local = (ib_q->pi_local + num_elem_alloted) % ib_q->num_elem;
 419
 420         DBG_INFO("ib_q->pi_local : %x\n", ib_q->pi_local);
 421         DBG_INFO("*ib_q->ci_virt_addr: %x\n",*(ib_q->ci_virt_addr));
 422
 423         /* Inform the fw about the new IU */
 424         PCI_MEM_PUT32(softs, ib_q->pi_register_abs, ib_q->pi_register_offset, ib_q->pi_local);
 425
 426         PQI_UNLOCK(&ib_q->lock);
 427         DBG_FUNC(" OUT ");
 428         return PQI_STATUS_SUCCESS;
 429 }
 430
 431 /* Subroutine used to set encryption info as part of RAID bypass IO*/
 432 static inline void pqisrc_set_enc_info(
 433         struct pqi_enc_info *enc_info, struct raid_map *raid_map,
 434         uint64_t first_block)
 435 {
 436         uint32_t volume_blk_size;
 437
 438         /*
 439          * Set the encryption tweak values based on logical block address.
 440          * If the block size is 512, the tweak value is equal to the LBA.
 441          * For other block sizes, tweak value is (LBA * block size) / 512.
 442          */
 443         volume_blk_size = GET_LE32((uint8_t *)&raid_map->volume_blk_size);
 444         if (volume_blk_size != 512)
 445                 first_block = (first_block * volume_blk_size) / 512;
 446
 447         enc_info->data_enc_key_index =
 448                 GET_LE16((uint8_t *)&raid_map->data_encryption_key_index);
 449         enc_info->encrypt_tweak_upper = ((uint32_t)(((first_block) >> 16) >> 16));
 450         enc_info->encrypt_tweak_lower = ((uint32_t)(first_block));
 451 }
 452
 453
 454 /*
 455  * Attempt to perform offload RAID mapping for a logical volume I/O.
 456  */
 457
 458 #define HPSA_RAID_0             0
 459 #define HPSA_RAID_4             1
 460 #define HPSA_RAID_1             2       /* also used for RAID 10 */
 461 #define HPSA_RAID_5             3       /* also used for RAID 50 */
 462 #define HPSA_RAID_51            4
 463 #define HPSA_RAID_6             5       /* also used for RAID 60 */
 464 #define HPSA_RAID_ADM           6       /* also used for RAID 1+0 ADM */
 465 #define HPSA_RAID_MAX           HPSA_RAID_ADM
 466 #define HPSA_RAID_UNKNOWN       0xff
 467
 468 /* Subroutine used to parse the scsi opcode and build the CDB for RAID bypass*/
 469 int check_for_scsi_opcode(uint8_t *cdb, boolean_t *is_write, uint64_t *fst_blk,
 470                                 uint32_t *blk_cnt) {
 471
 472         switch (cdb[0]) {
 473         case SCMD_WRITE_6:
 474                 *is_write = true;
 475         case SCMD_READ_6:
 476                 *fst_blk = (uint64_t)(((cdb[1] & 0x1F) << 16) |
 477                                 (cdb[2] << 8) | cdb[3]);
 478                 *blk_cnt = (uint32_t)cdb[4];
 479                 if (*blk_cnt == 0)
 480                         *blk_cnt = 256;
 481                 break;
 482         case SCMD_WRITE_10:
 483                 *is_write = true;
 484         case SCMD_READ_10:
 485                 *fst_blk = (uint64_t)GET_BE32(&cdb[2]);
 486                 *blk_cnt = (uint32_t)GET_BE16(&cdb[7]);
 487                 break;
 488         case SCMD_WRITE_12:
 489                 *is_write = true;
 490         case SCMD_READ_12:
 491                 *fst_blk = (uint64_t)GET_BE32(&cdb[2]);
 492                 *blk_cnt = GET_BE32(&cdb[6]);
 493                 break;
 494         case SCMD_WRITE_16:
 495                 *is_write = true;
 496         case SCMD_READ_16:
 497                 *fst_blk = GET_BE64(&cdb[2]);
 498                 *blk_cnt = GET_BE32(&cdb[10]);
 499                 break;
 500         default:
 501                 /* Process via normal I/O path. */
 502                 return PQI_STATUS_FAILURE;
 503         }
 504         return PQI_STATUS_SUCCESS;
 505 }
 506
 507 /*
 508  * Function used to build and send RAID bypass request to the adapter
 509  */
 510 int pqisrc_send_scsi_cmd_raidbypass(pqisrc_softstate_t *softs,
 511                                 pqi_scsi_dev_t *device, rcb_t *rcb, uint8_t *cdb)
 512 {
 513         struct raid_map *raid_map;
 514         boolean_t is_write = false;
 515         uint32_t map_idx;
 516         uint64_t fst_blk, lst_blk;
 517         uint32_t blk_cnt, blks_per_row;
 518         uint64_t fst_row, lst_row;
 519         uint32_t fst_row_offset, lst_row_offset;
 520         uint32_t fst_col, lst_col;
 521         uint32_t r5or6_blks_per_row;
 522         uint64_t r5or6_fst_row, r5or6_lst_row;
 523         uint32_t r5or6_fst_row_offset, r5or6_lst_row_offset;
 524         uint32_t r5or6_fst_col, r5or6_lst_col;
 525         uint16_t data_disks_per_row, total_disks_per_row;
 526         uint16_t layout_map_count;
 527         uint32_t stripesz;
 528         uint16_t strip_sz;
 529         uint32_t fst_grp, lst_grp, cur_grp;
 530         uint32_t map_row;
 531         uint64_t disk_block;
 532         uint32_t disk_blk_cnt;
 533         uint8_t cdb_length;
 534         int offload_to_mirror;
 535         int i;
 536         DBG_FUNC(" IN \n");
 537         DBG_IO("!!!!!\n");
 538
 539         /* Check for eligible opcode, get LBA and block count. */
 540         memcpy(cdb, OS_GET_CDBP(rcb), rcb->cmdlen);
 541
 542         for(i = 0; i < rcb->cmdlen ; i++)
 543                 DBG_IO(" CDB [ %d ] : %x\n",i,cdb[i]);
 544         if(check_for_scsi_opcode(cdb, &is_write,
 545                 &fst_blk, &blk_cnt) == PQI_STATUS_FAILURE)
 546                         return PQI_STATUS_FAILURE;
 547         /* Check for write to non-RAID-0. */
 548         if (is_write && device->raid_level != SA_RAID_0)
 549                 return PQI_STATUS_FAILURE;;
 550
 551         if(blk_cnt == 0)
 552                 return PQI_STATUS_FAILURE;
 553
 554         lst_blk = fst_blk + blk_cnt - 1;
 555         raid_map = device->raid_map;
 556
 557         /* Check for invalid block or wraparound. */
 558         if (lst_blk >= GET_LE64((uint8_t *)&raid_map->volume_blk_cnt) ||
 559                 lst_blk < fst_blk)
 560                 return PQI_STATUS_FAILURE;
 561
 562         data_disks_per_row = GET_LE16((uint8_t *)&raid_map->data_disks_per_row);
 563         strip_sz = GET_LE16((uint8_t *)(&raid_map->strip_size));
 564         layout_map_count = GET_LE16((uint8_t *)(&raid_map->layout_map_count));
 565
 566         /* Calculate stripe information for the request. */
 567         blks_per_row = data_disks_per_row * strip_sz;
 568
 569         /* use __udivdi3 ? */
 570         fst_row = fst_blk / blks_per_row;
 571         lst_row = lst_blk / blks_per_row;
 572         fst_row_offset = (uint32_t)(fst_blk - (fst_row * blks_per_row));
 573         lst_row_offset = (uint32_t)(lst_blk - (lst_row * blks_per_row));
 574         fst_col = fst_row_offset / strip_sz;
 575         lst_col = lst_row_offset / strip_sz;
 576
 577         /* If this isn't a single row/column then give to the controller. */
 578         if (fst_row != lst_row || fst_col != lst_col)
 579                 return PQI_STATUS_FAILURE;
 580
 581         /* Proceeding with driver mapping. */
 582         total_disks_per_row = data_disks_per_row +
 583                 GET_LE16((uint8_t *)(&raid_map->metadata_disks_per_row));
 584         map_row = ((uint32_t)(fst_row >> raid_map->parity_rotation_shift)) %
 585                 GET_LE16((uint8_t *)(&raid_map->row_cnt));
 586         map_idx = (map_row * total_disks_per_row) + fst_col;
 587
 588         /* RAID 1 */
 589         if (device->raid_level == SA_RAID_1) {
 590                 if (device->offload_to_mirror)
 591                         map_idx += data_disks_per_row;
 592                 device->offload_to_mirror = !device->offload_to_mirror;
 593         } else if (device->raid_level == SA_RAID_ADM) {
 594                 /* RAID ADM */
 595                 /*
 596                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
 597                  * divisible by 3.
 598                  */
 599                 offload_to_mirror = device->offload_to_mirror;
 600                 if (offload_to_mirror == 0)  {
 601                         /* use physical disk in the first mirrored group. */
 602                         map_idx %= data_disks_per_row;
 603                 } else {
 604                         do {
 605                                 /*
 606                                  * Determine mirror group that map_idx
 607                                  * indicates.
 608                                  */
 609                                 cur_grp = map_idx / data_disks_per_row;
 610
 611                                 if (offload_to_mirror != cur_grp) {
 612                                         if (cur_grp <
 613                                                 layout_map_count - 1) {
 614                                                 /*
 615                                                  * Select raid index from
 616                                                  * next group.
 617                                                  */
 618                                                 map_idx += data_disks_per_row;
 619                                                 cur_grp++;
 620                                         } else {
 621                                                 /*
 622                                                  * Select raid index from first
 623                                                  * group.
 624                                                  */
 625                                                 map_idx %= data_disks_per_row;
 626                                                 cur_grp = 0;
 627                                         }
 628                                 }
 629                         } while (offload_to_mirror != cur_grp);
 630                 }
 631
 632                 /* Set mirror group to use next time. */
 633                 offload_to_mirror =
 634                         (offload_to_mirror >= layout_map_count - 1) ?
 635                                 0 : offload_to_mirror + 1;
 636                 if(offload_to_mirror >= layout_map_count)
 637                         return PQI_STATUS_FAILURE;
 638
 639                 device->offload_to_mirror = offload_to_mirror;
 640                 /*
 641                  * Avoid direct use of device->offload_to_mirror within this
 642                  * function since multiple threads might simultaneously
 643                  * increment it beyond the range of device->layout_map_count -1.
 644                  */
 645         } else if ((device->raid_level == SA_RAID_5 ||
 646                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
 647                 /* RAID 50/60 */
 648                 /* Verify first and last block are in same RAID group */
 649                 r5or6_blks_per_row = strip_sz * data_disks_per_row;
 650                 stripesz = r5or6_blks_per_row * layout_map_count;
 651
 652                 fst_grp = (fst_blk % stripesz) / r5or6_blks_per_row;
 653                 lst_grp = (lst_blk % stripesz) / r5or6_blks_per_row;
 654
 655                 if (fst_grp != lst_grp)
 656                         return PQI_STATUS_FAILURE;
 657
 658                 /* Verify request is in a single row of RAID 5/6 */
 659                 fst_row = r5or6_fst_row =
 660                         fst_blk / stripesz;
 661                 r5or6_lst_row = lst_blk / stripesz;
 662
 663                 if (r5or6_fst_row != r5or6_lst_row)
 664                         return PQI_STATUS_FAILURE;
 665
 666                 /* Verify request is in a single column */
 667                 fst_row_offset = r5or6_fst_row_offset =
 668                         (uint32_t)((fst_blk % stripesz) %
 669                         r5or6_blks_per_row);
 670
 671                 r5or6_lst_row_offset =
 672                         (uint32_t)((lst_blk % stripesz) %
 673                         r5or6_blks_per_row);
 674
 675                 fst_col = r5or6_fst_row_offset / strip_sz;
 676                 r5or6_fst_col = fst_col;
 677                 r5or6_lst_col = r5or6_lst_row_offset / strip_sz;
 678
 679                 if (r5or6_fst_col != r5or6_lst_col)
 680                         return PQI_STATUS_FAILURE;
 681
 682                 /* Request is eligible */
 683                 map_row =
 684                         ((uint32_t)(fst_row >> raid_map->parity_rotation_shift)) %
 685                         GET_LE16((uint8_t *)(&raid_map->row_cnt));
 686
 687                 map_idx = (fst_grp *
 688                         (GET_LE16((uint8_t *)(&raid_map->row_cnt)) *
 689                         total_disks_per_row)) +
 690                         (map_row * total_disks_per_row) + fst_col;
 691         }
 692
 693         if (map_idx >= RAID_MAP_MAX_ENTRIES)
 694                 return PQI_STATUS_FAILURE;
 695
 696         rcb->ioaccel_handle = raid_map->dev_data[map_idx].ioaccel_handle;
 697         disk_block = GET_LE64((uint8_t *)(&raid_map->disk_starting_blk)) +
 698                 fst_row * strip_sz +
 699                 (fst_row_offset - fst_col * strip_sz);
 700         disk_blk_cnt = blk_cnt;
 701
 702         /* Handle differing logical/physical block sizes. */
 703         if (raid_map->phys_blk_shift) {
 704                 disk_block <<= raid_map->phys_blk_shift;
 705                 disk_blk_cnt <<= raid_map->phys_blk_shift;
 706         }
 707
 708         if (disk_blk_cnt > 0xffff)
 709                 return PQI_STATUS_FAILURE;
 710
 711         /* Build the new CDB for the physical disk I/O. */
 712         if (disk_block > 0xffffffff) {
 713                 cdb[0] = is_write ? SCMD_WRITE_16 : SCMD_READ_16;
 714                 cdb[1] = 0;
 715                 PUT_BE64(disk_block, &cdb[2]);
 716                 PUT_BE32(disk_blk_cnt, &cdb[10]);
 717                 cdb[14] = 0;
 718                 cdb[15] = 0;
 719                 cdb_length = 16;
 720         } else {
 721                 cdb[0] = is_write ? SCMD_WRITE_10 : SCMD_READ_10;
 722                 cdb[1] = 0;
 723                 PUT_BE32(disk_block, &cdb[2]);
 724                 cdb[6] = 0;
 725                 PUT_BE16(disk_blk_cnt, &cdb[7]);
 726                 cdb[9] = 0;
 727                 cdb_length = 10;
 728         }
 729
 730         if (GET_LE16((uint8_t *)(&raid_map->flags)) &
 731                 RAID_MAP_ENCRYPTION_ENABLED) {
 732                 pqisrc_set_enc_info(&rcb->enc_info, raid_map,
 733                         fst_blk);
 734                 rcb->encrypt_enable = true;
 735         } else {
 736                 rcb->encrypt_enable = false;
 737         }
 738
 739         rcb->cmdlen = cdb_length;
 740
 741
 742         DBG_FUNC("OUT");
 743
 744         return PQI_STATUS_SUCCESS;
 745 }
 746
 747 /* Function used to submit a TMF to the adater */
 748 int pqisrc_send_tmf(pqisrc_softstate_t *softs, pqi_scsi_dev_t *devp,
 749                     rcb_t *rcb, int req_id, int tmf_type)
 750 {
 751         int rval = PQI_STATUS_SUCCESS;
 752         pqi_tmf_req_t tmf_req;
 753
 754         memset(&tmf_req, 0, sizeof(pqi_tmf_req_t));
 755
 756         DBG_FUNC("IN");
 757
 758         tmf_req.header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
 759         tmf_req.header.iu_length = sizeof(tmf_req) - sizeof(iu_header_t);
 760         tmf_req.req_id = rcb->tag;
 761
 762         memcpy(tmf_req.lun, devp->scsi3addr, sizeof(tmf_req.lun));
 763         tmf_req.tmf = tmf_type;
 764         tmf_req.req_id_to_manage = req_id;
 765         tmf_req.resp_qid = OS_GET_TMF_RESP_QID(softs, rcb);
 766         tmf_req.obq_id_to_manage = rcb->resp_qid;
 767
 768         rcb->req_pending = true;
 769
 770         rval = pqisrc_submit_cmnd(softs,
 771         &softs->op_raid_ib_q[OS_GET_TMF_REQ_QINDEX(softs, rcb)], &tmf_req);
 772         if (rval != PQI_STATUS_SUCCESS) {
 773                 DBG_ERR("Unable to submit command rval=%d\n", rval);
 774                 return rval;
 775         }
 776
 777         rval = pqisrc_wait_on_condition(softs, rcb);
 778         if (rval != PQI_STATUS_SUCCESS){
 779                 DBG_ERR("Task Management tmf_type : %d timeout\n", tmf_type);
 780                 rcb->status = REQUEST_FAILED;
 781         }
 782
 783         if (rcb->status  != REQUEST_SUCCESS) {
 784                 DBG_ERR_BTL(devp, "Task Management failed tmf_type:%d "
 785                                 "stat:0x%x\n", tmf_type, rcb->status);
 786                 rval = PQI_STATUS_FAILURE;
 787         }
 788
 789         DBG_FUNC("OUT");
 790         return rval;
 791 }