1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Linux MegaRAID driver for SAS based RAID controllers 4 * 5 * Copyright (c) 2009-2013 LSI Corporation 6 * Copyright (c) 2013-2016 Avago Technologies 7 * Copyright (c) 2016-2018 Broadcom Inc. 8 * 9 * FILE: megaraid_sas_fp.c 10 * 11 * Authors: Broadcom Inc. 12 * Sumant Patro 13 * Varad Talamacki 14 * Manoj Jose 15 * Kashyap Desai <kashyap.desai@broadcom.com> 16 * Sumit Saxena <sumit.saxena@broadcom.com> 17 * 18 * Send feedback to: megaraidlinux.pdl@broadcom.com 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/types.h> 23 #include <linux/pci.h> 24 #include <linux/list.h> 25 #include <linux/moduleparam.h> 26 #include <linux/module.h> 27 #include <linux/spinlock.h> 28 #include <linux/interrupt.h> 29 #include <linux/delay.h> 30 #include <linux/uio.h> 31 #include <linux/uaccess.h> 32 #include <linux/fs.h> 33 #include <linux/compat.h> 34 #include <linux/blkdev.h> 35 #include <linux/poll.h> 36 #include <linux/irq_poll.h> 37 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_cmnd.h> 40 #include <scsi/scsi_device.h> 41 #include <scsi/scsi_host.h> 42 43 #include "megaraid_sas_fusion.h" 44 #include "megaraid_sas.h" 45 #include <asm/div64.h> 46 47 #define LB_PENDING_CMDS_DEFAULT 4 48 static unsigned int lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; 49 module_param(lb_pending_cmds, int, 0444); 50 MODULE_PARM_DESC(lb_pending_cmds, "Change raid-1 load balancing outstanding " 51 "threshold. Valid Values are 1-128. Default: 4"); 52 53 54 #define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a))) 55 #define MR_LD_STATE_OPTIMAL 3 56 57 #define SPAN_ROW_SIZE(map, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowSize) 58 #define SPAN_ROW_DATA_SIZE(map_, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize) 59 #define SPAN_INVALID 0xff 60 61 /* Prototypes */ 62 static void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, 63 PLD_SPAN_INFO ldSpanInfo); 64 static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, 65 u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, 66 struct RAID_CONTEXT *pRAID_Context, struct MR_DRV_RAID_MAP_ALL *map); 67 static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, 68 u64 strip, struct MR_DRV_RAID_MAP_ALL *map); 69 70 u32 mega_mod64(u64 dividend, u32 divisor) 71 { 72 u64 d; 73 u32 remainder; 74 75 if (!divisor) 76 printk(KERN_ERR "megasas : DIVISOR is zero, in div fn\n"); 77 d = dividend; 78 remainder = do_div(d, divisor); 79 return remainder; 80 } 81 82 /** 83 * mega_div64_32 - Do a 64-bit division 84 * @dividend: Dividend 85 * @divisor: Divisor 86 * 87 * @return quotient 88 **/ 89 static u64 mega_div64_32(uint64_t dividend, uint32_t divisor) 90 { 91 u64 d = dividend; 92 93 if (!divisor) 94 printk(KERN_ERR "megasas : DIVISOR is zero in mod fn\n"); 95 96 do_div(d, divisor); 97 98 return d; 99 } 100 101 struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) 102 { 103 return &map->raidMap.ldSpanMap[ld].ldRaid; 104 } 105 106 static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld, 107 struct MR_DRV_RAID_MAP_ALL 108 *map) 109 { 110 return &map->raidMap.ldSpanMap[ld].spanBlock[0]; 111 } 112 113 static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_DRV_RAID_MAP_ALL *map) 114 { 115 return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx]; 116 } 117 118 u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_DRV_RAID_MAP_ALL *map) 119 { 120 return le16_to_cpu(map->raidMap.arMapInfo[ar].pd[arm]); 121 } 122 123 u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_DRV_RAID_MAP_ALL *map) 124 { 125 return le16_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef); 126 } 127 128 __le16 MR_PdDevHandleGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) 129 { 130 return map->raidMap.devHndlInfo[pd].curDevHdl; 131 } 132 133 static u8 MR_PdInterfaceTypeGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) 134 { 135 return map->raidMap.devHndlInfo[pd].interfaceType; 136 } 137 138 u16 MR_GetLDTgtId(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) 139 { 140 return le16_to_cpu(map->raidMap.ldSpanMap[ld].ldRaid.targetId); 141 } 142 143 u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_DRV_RAID_MAP_ALL *map) 144 { 145 return map->raidMap.ldTgtIdToLd[ldTgtId]; 146 } 147 148 static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span, 149 struct MR_DRV_RAID_MAP_ALL *map) 150 { 151 return &map->raidMap.ldSpanMap[ld].spanBlock[span].span; 152 } 153 154 /* 155 * This function will Populate Driver Map using firmware raid map 156 */ 157 static int MR_PopulateDrvRaidMap(struct megasas_instance *instance, u64 map_id) 158 { 159 struct fusion_context *fusion = instance->ctrl_context; 160 struct MR_FW_RAID_MAP_ALL *fw_map_old = NULL; 161 struct MR_FW_RAID_MAP *pFwRaidMap = NULL; 162 int i, j; 163 u16 ld_count; 164 struct MR_FW_RAID_MAP_DYNAMIC *fw_map_dyn; 165 struct MR_FW_RAID_MAP_EXT *fw_map_ext; 166 struct MR_RAID_MAP_DESC_TABLE *desc_table; 167 168 169 struct MR_DRV_RAID_MAP_ALL *drv_map = 170 fusion->ld_drv_map[(map_id & 1)]; 171 struct MR_DRV_RAID_MAP *pDrvRaidMap = &drv_map->raidMap; 172 void *raid_map_data = NULL; 173 174 memset(drv_map, 0, fusion->drv_map_sz); 175 memset(pDrvRaidMap->ldTgtIdToLd, 176 0xff, (sizeof(u16) * MAX_LOGICAL_DRIVES_DYN)); 177 178 if (instance->max_raid_mapsize) { 179 fw_map_dyn = fusion->ld_map[(map_id & 1)]; 180 desc_table = 181 (struct MR_RAID_MAP_DESC_TABLE *)((void *)fw_map_dyn + le32_to_cpu(fw_map_dyn->desc_table_offset)); 182 if (desc_table != fw_map_dyn->raid_map_desc_table) 183 dev_dbg(&instance->pdev->dev, "offsets of desc table are not matching desc %p original %p\n", 184 desc_table, fw_map_dyn->raid_map_desc_table); 185 186 ld_count = (u16)le16_to_cpu(fw_map_dyn->ld_count); 187 pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); 188 pDrvRaidMap->fpPdIoTimeoutSec = 189 fw_map_dyn->fp_pd_io_timeout_sec; 190 pDrvRaidMap->totalSize = 191 cpu_to_le32(sizeof(struct MR_DRV_RAID_MAP_ALL)); 192 /* point to actual data starting point*/ 193 raid_map_data = (void *)fw_map_dyn + 194 le32_to_cpu(fw_map_dyn->desc_table_offset) + 195 le32_to_cpu(fw_map_dyn->desc_table_size); 196 197 for (i = 0; i < le32_to_cpu(fw_map_dyn->desc_table_num_elements); ++i) { 198 switch (le32_to_cpu(desc_table->raid_map_desc_type)) { 199 case RAID_MAP_DESC_TYPE_DEVHDL_INFO: 200 fw_map_dyn->dev_hndl_info = 201 (struct MR_DEV_HANDLE_INFO *)(raid_map_data + le32_to_cpu(desc_table->raid_map_desc_offset)); 202 memcpy(pDrvRaidMap->devHndlInfo, 203 fw_map_dyn->dev_hndl_info, 204 sizeof(struct MR_DEV_HANDLE_INFO) * 205 le32_to_cpu(desc_table->raid_map_desc_elements)); 206 break; 207 case RAID_MAP_DESC_TYPE_TGTID_INFO: 208 fw_map_dyn->ld_tgt_id_to_ld = 209 (u16 *)(raid_map_data + 210 le32_to_cpu(desc_table->raid_map_desc_offset)); 211 for (j = 0; j < le32_to_cpu(desc_table->raid_map_desc_elements); j++) { 212 pDrvRaidMap->ldTgtIdToLd[j] = 213 le16_to_cpu(fw_map_dyn->ld_tgt_id_to_ld[j]); 214 } 215 break; 216 case RAID_MAP_DESC_TYPE_ARRAY_INFO: 217 fw_map_dyn->ar_map_info = 218 (struct MR_ARRAY_INFO *) 219 (raid_map_data + le32_to_cpu(desc_table->raid_map_desc_offset)); 220 memcpy(pDrvRaidMap->arMapInfo, 221 fw_map_dyn->ar_map_info, 222 sizeof(struct MR_ARRAY_INFO) * 223 le32_to_cpu(desc_table->raid_map_desc_elements)); 224 break; 225 case RAID_MAP_DESC_TYPE_SPAN_INFO: 226 fw_map_dyn->ld_span_map = 227 (struct MR_LD_SPAN_MAP *) 228 (raid_map_data + 229 le32_to_cpu(desc_table->raid_map_desc_offset)); 230 memcpy(pDrvRaidMap->ldSpanMap, 231 fw_map_dyn->ld_span_map, 232 sizeof(struct MR_LD_SPAN_MAP) * 233 le32_to_cpu(desc_table->raid_map_desc_elements)); 234 break; 235 default: 236 dev_dbg(&instance->pdev->dev, "wrong number of desctableElements %d\n", 237 fw_map_dyn->desc_table_num_elements); 238 } 239 ++desc_table; 240 } 241 242 } else if (instance->supportmax256vd) { 243 fw_map_ext = 244 (struct MR_FW_RAID_MAP_EXT *)fusion->ld_map[(map_id & 1)]; 245 ld_count = (u16)le16_to_cpu(fw_map_ext->ldCount); 246 if (ld_count > MAX_LOGICAL_DRIVES_EXT) { 247 dev_dbg(&instance->pdev->dev, "megaraid_sas: LD count exposed in RAID map in not valid\n"); 248 return 1; 249 } 250 251 pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); 252 pDrvRaidMap->fpPdIoTimeoutSec = fw_map_ext->fpPdIoTimeoutSec; 253 for (i = 0; i < (MAX_LOGICAL_DRIVES_EXT); i++) 254 pDrvRaidMap->ldTgtIdToLd[i] = 255 (u16)fw_map_ext->ldTgtIdToLd[i]; 256 memcpy(pDrvRaidMap->ldSpanMap, fw_map_ext->ldSpanMap, 257 sizeof(struct MR_LD_SPAN_MAP) * ld_count); 258 memcpy(pDrvRaidMap->arMapInfo, fw_map_ext->arMapInfo, 259 sizeof(struct MR_ARRAY_INFO) * MAX_API_ARRAYS_EXT); 260 memcpy(pDrvRaidMap->devHndlInfo, fw_map_ext->devHndlInfo, 261 sizeof(struct MR_DEV_HANDLE_INFO) * 262 MAX_RAIDMAP_PHYSICAL_DEVICES); 263 264 /* New Raid map will not set totalSize, so keep expected value 265 * for legacy code in ValidateMapInfo 266 */ 267 pDrvRaidMap->totalSize = 268 cpu_to_le32(sizeof(struct MR_FW_RAID_MAP_EXT)); 269 } else { 270 fw_map_old = (struct MR_FW_RAID_MAP_ALL *) 271 fusion->ld_map[(map_id & 1)]; 272 pFwRaidMap = &fw_map_old->raidMap; 273 ld_count = (u16)le32_to_cpu(pFwRaidMap->ldCount); 274 if (ld_count > MAX_LOGICAL_DRIVES) { 275 dev_dbg(&instance->pdev->dev, 276 "LD count exposed in RAID map in not valid\n"); 277 return 1; 278 } 279 280 pDrvRaidMap->totalSize = pFwRaidMap->totalSize; 281 pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); 282 pDrvRaidMap->fpPdIoTimeoutSec = pFwRaidMap->fpPdIoTimeoutSec; 283 for (i = 0; i < MAX_RAIDMAP_LOGICAL_DRIVES + MAX_RAIDMAP_VIEWS; i++) 284 pDrvRaidMap->ldTgtIdToLd[i] = 285 (u8)pFwRaidMap->ldTgtIdToLd[i]; 286 for (i = 0; i < ld_count; i++) { 287 pDrvRaidMap->ldSpanMap[i] = pFwRaidMap->ldSpanMap[i]; 288 } 289 memcpy(pDrvRaidMap->arMapInfo, pFwRaidMap->arMapInfo, 290 sizeof(struct MR_ARRAY_INFO) * MAX_RAIDMAP_ARRAYS); 291 memcpy(pDrvRaidMap->devHndlInfo, pFwRaidMap->devHndlInfo, 292 sizeof(struct MR_DEV_HANDLE_INFO) * 293 MAX_RAIDMAP_PHYSICAL_DEVICES); 294 } 295 296 return 0; 297 } 298 299 /* 300 * This function will validate Map info data provided by FW 301 */ 302 u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) 303 { 304 struct fusion_context *fusion; 305 struct MR_DRV_RAID_MAP_ALL *drv_map; 306 struct MR_DRV_RAID_MAP *pDrvRaidMap; 307 struct LD_LOAD_BALANCE_INFO *lbInfo; 308 PLD_SPAN_INFO ldSpanInfo; 309 struct MR_LD_RAID *raid; 310 u16 num_lds, i; 311 u16 ld; 312 u32 expected_size; 313 314 if (MR_PopulateDrvRaidMap(instance, map_id)) 315 return 0; 316 317 fusion = instance->ctrl_context; 318 drv_map = fusion->ld_drv_map[(map_id & 1)]; 319 pDrvRaidMap = &drv_map->raidMap; 320 321 lbInfo = fusion->load_balance_info; 322 ldSpanInfo = fusion->log_to_span; 323 324 if (instance->max_raid_mapsize) 325 expected_size = sizeof(struct MR_DRV_RAID_MAP_ALL); 326 else if (instance->supportmax256vd) 327 expected_size = sizeof(struct MR_FW_RAID_MAP_EXT); 328 else 329 expected_size = 330 (sizeof(struct MR_FW_RAID_MAP) - sizeof(struct MR_LD_SPAN_MAP) + 331 (sizeof(struct MR_LD_SPAN_MAP) * le16_to_cpu(pDrvRaidMap->ldCount))); 332 333 if (le32_to_cpu(pDrvRaidMap->totalSize) != expected_size) { 334 dev_dbg(&instance->pdev->dev, "megasas: map info structure size 0x%x", 335 le32_to_cpu(pDrvRaidMap->totalSize)); 336 dev_dbg(&instance->pdev->dev, "is not matching expected size 0x%x\n", 337 (unsigned int)expected_size); 338 dev_err(&instance->pdev->dev, "megasas: span map %x, pDrvRaidMap->totalSize : %x\n", 339 (unsigned int)sizeof(struct MR_LD_SPAN_MAP), 340 le32_to_cpu(pDrvRaidMap->totalSize)); 341 return 0; 342 } 343 344 if (instance->UnevenSpanSupport) 345 mr_update_span_set(drv_map, ldSpanInfo); 346 347 if (lbInfo) 348 mr_update_load_balance_params(drv_map, lbInfo); 349 350 num_lds = le16_to_cpu(drv_map->raidMap.ldCount); 351 352 /*Convert Raid capability values to CPU arch */ 353 for (i = 0; (num_lds > 0) && (i < MAX_LOGICAL_DRIVES_EXT); i++) { 354 ld = MR_TargetIdToLdGet(i, drv_map); 355 356 /* For non existing VDs, iterate to next VD*/ 357 if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) 358 continue; 359 360 raid = MR_LdRaidGet(ld, drv_map); 361 le32_to_cpus((u32 *)&raid->capability); 362 363 num_lds--; 364 } 365 366 return 1; 367 } 368 369 static u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk, 370 struct MR_DRV_RAID_MAP_ALL *map) 371 { 372 struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map); 373 struct MR_QUAD_ELEMENT *quad; 374 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 375 u32 span, j; 376 377 for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) { 378 379 for (j = 0; j < le32_to_cpu(pSpanBlock->block_span_info.noElements); j++) { 380 quad = &pSpanBlock->block_span_info.quad[j]; 381 382 if (le32_to_cpu(quad->diff) == 0) 383 return SPAN_INVALID; 384 if (le64_to_cpu(quad->logStart) <= row && row <= 385 le64_to_cpu(quad->logEnd) && (mega_mod64(row - le64_to_cpu(quad->logStart), 386 le32_to_cpu(quad->diff))) == 0) { 387 if (span_blk != NULL) { 388 u64 blk; 389 blk = mega_div64_32((row-le64_to_cpu(quad->logStart)), le32_to_cpu(quad->diff)); 390 391 blk = (blk + le64_to_cpu(quad->offsetInSpan)) << raid->stripeShift; 392 *span_blk = blk; 393 } 394 return span; 395 } 396 } 397 } 398 return SPAN_INVALID; 399 } 400 401 /* 402 ****************************************************************************** 403 * 404 * This routine calculates the Span block for given row using spanset. 405 * 406 * Inputs : 407 * instance - HBA instance 408 * ld - Logical drive number 409 * row - Row number 410 * map - LD map 411 * 412 * Outputs : 413 * 414 * span - Span number 415 * block - Absolute Block number in the physical disk 416 * div_error - Devide error code. 417 */ 418 419 static u32 mr_spanset_get_span_block(struct megasas_instance *instance, 420 u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL *map) 421 { 422 struct fusion_context *fusion = instance->ctrl_context; 423 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 424 LD_SPAN_SET *span_set; 425 struct MR_QUAD_ELEMENT *quad; 426 u32 span, info; 427 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 428 429 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 430 span_set = &(ldSpanInfo[ld].span_set[info]); 431 432 if (span_set->span_row_data_width == 0) 433 break; 434 435 if (row > span_set->data_row_end) 436 continue; 437 438 for (span = 0; span < raid->spanDepth; span++) 439 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 440 block_span_info.noElements) >= info+1) { 441 quad = &map->raidMap.ldSpanMap[ld]. 442 spanBlock[span]. 443 block_span_info.quad[info]; 444 if (le32_to_cpu(quad->diff) == 0) 445 return SPAN_INVALID; 446 if (le64_to_cpu(quad->logStart) <= row && 447 row <= le64_to_cpu(quad->logEnd) && 448 (mega_mod64(row - le64_to_cpu(quad->logStart), 449 le32_to_cpu(quad->diff))) == 0) { 450 if (span_blk != NULL) { 451 u64 blk; 452 blk = mega_div64_32 453 ((row - le64_to_cpu(quad->logStart)), 454 le32_to_cpu(quad->diff)); 455 blk = (blk + le64_to_cpu(quad->offsetInSpan)) 456 << raid->stripeShift; 457 *span_blk = blk; 458 } 459 return span; 460 } 461 } 462 } 463 return SPAN_INVALID; 464 } 465 466 /* 467 ****************************************************************************** 468 * 469 * This routine calculates the row for given strip using spanset. 470 * 471 * Inputs : 472 * instance - HBA instance 473 * ld - Logical drive number 474 * Strip - Strip 475 * map - LD map 476 * 477 * Outputs : 478 * 479 * row - row associated with strip 480 */ 481 482 static u64 get_row_from_strip(struct megasas_instance *instance, 483 u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) 484 { 485 struct fusion_context *fusion = instance->ctrl_context; 486 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 487 LD_SPAN_SET *span_set; 488 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 489 u32 info, strip_offset, span, span_offset; 490 u64 span_set_Strip, span_set_Row, retval; 491 492 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 493 span_set = &(ldSpanInfo[ld].span_set[info]); 494 495 if (span_set->span_row_data_width == 0) 496 break; 497 if (strip > span_set->data_strip_end) 498 continue; 499 500 span_set_Strip = strip - span_set->data_strip_start; 501 strip_offset = mega_mod64(span_set_Strip, 502 span_set->span_row_data_width); 503 span_set_Row = mega_div64_32(span_set_Strip, 504 span_set->span_row_data_width) * span_set->diff; 505 for (span = 0, span_offset = 0; span < raid->spanDepth; span++) 506 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 507 block_span_info.noElements) >= info+1) { 508 if (strip_offset >= 509 span_set->strip_offset[span]) 510 span_offset++; 511 else 512 break; 513 } 514 515 retval = (span_set->data_row_start + span_set_Row + 516 (span_offset - 1)); 517 return retval; 518 } 519 return -1LLU; 520 } 521 522 523 /* 524 ****************************************************************************** 525 * 526 * This routine calculates the Start Strip for given row using spanset. 527 * 528 * Inputs : 529 * instance - HBA instance 530 * ld - Logical drive number 531 * row - Row number 532 * map - LD map 533 * 534 * Outputs : 535 * 536 * Strip - Start strip associated with row 537 */ 538 539 static u64 get_strip_from_row(struct megasas_instance *instance, 540 u32 ld, u64 row, struct MR_DRV_RAID_MAP_ALL *map) 541 { 542 struct fusion_context *fusion = instance->ctrl_context; 543 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 544 LD_SPAN_SET *span_set; 545 struct MR_QUAD_ELEMENT *quad; 546 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 547 u32 span, info; 548 u64 strip; 549 550 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 551 span_set = &(ldSpanInfo[ld].span_set[info]); 552 553 if (span_set->span_row_data_width == 0) 554 break; 555 if (row > span_set->data_row_end) 556 continue; 557 558 for (span = 0; span < raid->spanDepth; span++) 559 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 560 block_span_info.noElements) >= info+1) { 561 quad = &map->raidMap.ldSpanMap[ld]. 562 spanBlock[span].block_span_info.quad[info]; 563 if (le64_to_cpu(quad->logStart) <= row && 564 row <= le64_to_cpu(quad->logEnd) && 565 mega_mod64((row - le64_to_cpu(quad->logStart)), 566 le32_to_cpu(quad->diff)) == 0) { 567 strip = mega_div64_32 568 (((row - span_set->data_row_start) 569 - le64_to_cpu(quad->logStart)), 570 le32_to_cpu(quad->diff)); 571 strip *= span_set->span_row_data_width; 572 strip += span_set->data_strip_start; 573 strip += span_set->strip_offset[span]; 574 return strip; 575 } 576 } 577 } 578 dev_err(&instance->pdev->dev, "get_strip_from_row" 579 "returns invalid strip for ld=%x, row=%lx\n", 580 ld, (long unsigned int)row); 581 return -1; 582 } 583 584 /* 585 ****************************************************************************** 586 * 587 * This routine calculates the Physical Arm for given strip using spanset. 588 * 589 * Inputs : 590 * instance - HBA instance 591 * ld - Logical drive number 592 * strip - Strip 593 * map - LD map 594 * 595 * Outputs : 596 * 597 * Phys Arm - Phys Arm associated with strip 598 */ 599 600 static u32 get_arm_from_strip(struct megasas_instance *instance, 601 u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) 602 { 603 struct fusion_context *fusion = instance->ctrl_context; 604 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 605 LD_SPAN_SET *span_set; 606 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 607 u32 info, strip_offset, span, span_offset, retval; 608 609 for (info = 0 ; info < MAX_QUAD_DEPTH; info++) { 610 span_set = &(ldSpanInfo[ld].span_set[info]); 611 612 if (span_set->span_row_data_width == 0) 613 break; 614 if (strip > span_set->data_strip_end) 615 continue; 616 617 strip_offset = (uint)mega_mod64 618 ((strip - span_set->data_strip_start), 619 span_set->span_row_data_width); 620 621 for (span = 0, span_offset = 0; span < raid->spanDepth; span++) 622 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 623 block_span_info.noElements) >= info+1) { 624 if (strip_offset >= 625 span_set->strip_offset[span]) 626 span_offset = 627 span_set->strip_offset[span]; 628 else 629 break; 630 } 631 632 retval = (strip_offset - span_offset); 633 return retval; 634 } 635 636 dev_err(&instance->pdev->dev, "get_arm_from_strip" 637 "returns invalid arm for ld=%x strip=%lx\n", 638 ld, (long unsigned int)strip); 639 640 return -1; 641 } 642 643 /* This Function will return Phys arm */ 644 static u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe, 645 struct MR_DRV_RAID_MAP_ALL *map) 646 { 647 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 648 /* Need to check correct default value */ 649 u32 arm = 0; 650 651 switch (raid->level) { 652 case 0: 653 case 5: 654 case 6: 655 arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span)); 656 break; 657 case 1: 658 /* start with logical arm */ 659 arm = get_arm_from_strip(instance, ld, stripe, map); 660 if (arm != -1U) 661 arm *= 2; 662 break; 663 } 664 665 return arm; 666 } 667 668 669 /* 670 ****************************************************************************** 671 * 672 * This routine calculates the arm, span and block for the specified stripe and 673 * reference in stripe using spanset 674 * 675 * Inputs : 676 * 677 * ld - Logical drive number 678 * stripRow - Stripe number 679 * stripRef - Reference in stripe 680 * 681 * Outputs : 682 * 683 * span - Span number 684 * block - Absolute Block number in the physical disk 685 */ 686 static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, 687 u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, 688 struct RAID_CONTEXT *pRAID_Context, 689 struct MR_DRV_RAID_MAP_ALL *map) 690 { 691 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 692 u32 pd, arRef, r1_alt_pd; 693 u8 physArm, span; 694 u64 row; 695 u8 retval = true; 696 u64 *pdBlock = &io_info->pdBlock; 697 __le16 *pDevHandle = &io_info->devHandle; 698 u8 *pPdInterface = &io_info->pd_interface; 699 u32 logArm, rowMod, armQ, arm; 700 701 *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); 702 703 /*Get row and span from io_info for Uneven Span IO.*/ 704 row = io_info->start_row; 705 span = io_info->start_span; 706 707 708 if (raid->level == 6) { 709 logArm = get_arm_from_strip(instance, ld, stripRow, map); 710 if (logArm == -1U) 711 return false; 712 rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span)); 713 armQ = SPAN_ROW_SIZE(map, ld, span) - 1 - rowMod; 714 arm = armQ + 1 + logArm; 715 if (arm >= SPAN_ROW_SIZE(map, ld, span)) 716 arm -= SPAN_ROW_SIZE(map, ld, span); 717 physArm = (u8)arm; 718 } else 719 /* Calculate the arm */ 720 physArm = get_arm(instance, ld, span, stripRow, map); 721 if (physArm == 0xFF) 722 return false; 723 724 arRef = MR_LdSpanArrayGet(ld, span, map); 725 pd = MR_ArPdGet(arRef, physArm, map); 726 727 if (pd != MR_PD_INVALID) { 728 *pDevHandle = MR_PdDevHandleGet(pd, map); 729 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 730 /* get second pd also for raid 1/10 fast path writes*/ 731 if ((instance->adapter_type >= VENTURA_SERIES) && 732 (raid->level == 1) && 733 !io_info->isRead) { 734 r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); 735 if (r1_alt_pd != MR_PD_INVALID) 736 io_info->r1_alt_dev_handle = 737 MR_PdDevHandleGet(r1_alt_pd, map); 738 } 739 } else { 740 if ((raid->level >= 5) && 741 ((instance->adapter_type == THUNDERBOLT_SERIES) || 742 ((instance->adapter_type == INVADER_SERIES) && 743 (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) 744 pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; 745 else if (raid->level == 1) { 746 physArm = physArm + 1; 747 pd = MR_ArPdGet(arRef, physArm, map); 748 if (pd != MR_PD_INVALID) { 749 *pDevHandle = MR_PdDevHandleGet(pd, map); 750 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 751 } 752 } 753 } 754 755 *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); 756 if (instance->adapter_type >= VENTURA_SERIES) { 757 ((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = 758 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 759 io_info->span_arm = 760 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 761 } else { 762 pRAID_Context->span_arm = 763 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 764 io_info->span_arm = pRAID_Context->span_arm; 765 } 766 io_info->pd_after_lb = pd; 767 return retval; 768 } 769 770 /* 771 ****************************************************************************** 772 * 773 * This routine calculates the arm, span and block for the specified stripe and 774 * reference in stripe. 775 * 776 * Inputs : 777 * 778 * ld - Logical drive number 779 * stripRow - Stripe number 780 * stripRef - Reference in stripe 781 * 782 * Outputs : 783 * 784 * span - Span number 785 * block - Absolute Block number in the physical disk 786 */ 787 static u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow, 788 u16 stripRef, struct IO_REQUEST_INFO *io_info, 789 struct RAID_CONTEXT *pRAID_Context, 790 struct MR_DRV_RAID_MAP_ALL *map) 791 { 792 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 793 u32 pd, arRef, r1_alt_pd; 794 u8 physArm, span; 795 u64 row; 796 u8 retval = true; 797 u64 *pdBlock = &io_info->pdBlock; 798 __le16 *pDevHandle = &io_info->devHandle; 799 u8 *pPdInterface = &io_info->pd_interface; 800 801 *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); 802 803 row = mega_div64_32(stripRow, raid->rowDataSize); 804 805 if (raid->level == 6) { 806 /* logical arm within row */ 807 u32 logArm = mega_mod64(stripRow, raid->rowDataSize); 808 u32 rowMod, armQ, arm; 809 810 if (raid->rowSize == 0) 811 return false; 812 /* get logical row mod */ 813 rowMod = mega_mod64(row, raid->rowSize); 814 armQ = raid->rowSize-1-rowMod; /* index of Q drive */ 815 arm = armQ+1+logArm; /* data always logically follows Q */ 816 if (arm >= raid->rowSize) /* handle wrap condition */ 817 arm -= raid->rowSize; 818 physArm = (u8)arm; 819 } else { 820 if (raid->modFactor == 0) 821 return false; 822 physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow, 823 raid->modFactor), 824 map); 825 } 826 827 if (raid->spanDepth == 1) { 828 span = 0; 829 *pdBlock = row << raid->stripeShift; 830 } else { 831 span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map); 832 if (span == SPAN_INVALID) 833 return false; 834 } 835 836 /* Get the array on which this span is present */ 837 arRef = MR_LdSpanArrayGet(ld, span, map); 838 pd = MR_ArPdGet(arRef, physArm, map); /* Get the pd */ 839 840 if (pd != MR_PD_INVALID) { 841 /* Get dev handle from Pd. */ 842 *pDevHandle = MR_PdDevHandleGet(pd, map); 843 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 844 /* get second pd also for raid 1/10 fast path writes*/ 845 if ((instance->adapter_type >= VENTURA_SERIES) && 846 (raid->level == 1) && 847 !io_info->isRead) { 848 r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); 849 if (r1_alt_pd != MR_PD_INVALID) 850 io_info->r1_alt_dev_handle = 851 MR_PdDevHandleGet(r1_alt_pd, map); 852 } 853 } else { 854 if ((raid->level >= 5) && 855 ((instance->adapter_type == THUNDERBOLT_SERIES) || 856 ((instance->adapter_type == INVADER_SERIES) && 857 (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) 858 pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; 859 else if (raid->level == 1) { 860 /* Get alternate Pd. */ 861 physArm = physArm + 1; 862 pd = MR_ArPdGet(arRef, physArm, map); 863 if (pd != MR_PD_INVALID) { 864 /* Get dev handle from Pd */ 865 *pDevHandle = MR_PdDevHandleGet(pd, map); 866 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 867 } 868 } 869 } 870 871 *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); 872 if (instance->adapter_type >= VENTURA_SERIES) { 873 ((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = 874 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 875 io_info->span_arm = 876 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 877 } else { 878 pRAID_Context->span_arm = 879 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 880 io_info->span_arm = pRAID_Context->span_arm; 881 } 882 io_info->pd_after_lb = pd; 883 return retval; 884 } 885 886 /* 887 * mr_get_phy_params_r56_rmw - Calculate parameters for R56 CTIO write operation 888 * @instance: Adapter soft state 889 * @ld: LD index 890 * @stripNo: Strip Number 891 * @io_info: IO info structure pointer 892 * pRAID_Context: RAID context pointer 893 * map: RAID map pointer 894 * 895 * This routine calculates the logical arm, data Arm, row number and parity arm 896 * for R56 CTIO write operation. 897 */ 898 static void mr_get_phy_params_r56_rmw(struct megasas_instance *instance, 899 u32 ld, u64 stripNo, 900 struct IO_REQUEST_INFO *io_info, 901 struct RAID_CONTEXT_G35 *pRAID_Context, 902 struct MR_DRV_RAID_MAP_ALL *map) 903 { 904 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 905 u8 span, dataArms, arms, dataArm, logArm; 906 s8 rightmostParityArm, PParityArm; 907 u64 rowNum; 908 u64 *pdBlock = &io_info->pdBlock; 909 910 dataArms = raid->rowDataSize; 911 arms = raid->rowSize; 912 913 rowNum = mega_div64_32(stripNo, dataArms); 914 /* parity disk arm, first arm is 0 */ 915 rightmostParityArm = (arms - 1) - mega_mod64(rowNum, arms); 916 917 /* logical arm within row */ 918 logArm = mega_mod64(stripNo, dataArms); 919 /* physical arm for data */ 920 dataArm = mega_mod64((rightmostParityArm + 1 + logArm), arms); 921 922 if (raid->spanDepth == 1) { 923 span = 0; 924 } else { 925 span = (u8)MR_GetSpanBlock(ld, rowNum, pdBlock, map); 926 if (span == SPAN_INVALID) 927 return; 928 } 929 930 if (raid->level == 6) { 931 /* P Parity arm, note this can go negative adjust if negative */ 932 PParityArm = (arms - 2) - mega_mod64(rowNum, arms); 933 934 if (PParityArm < 0) 935 PParityArm += arms; 936 937 /* rightmostParityArm is P-Parity for RAID 5 and Q-Parity for RAID */ 938 pRAID_Context->flow_specific.r56_arm_map = rightmostParityArm; 939 pRAID_Context->flow_specific.r56_arm_map |= 940 (u16)(PParityArm << RAID_CTX_R56_P_ARM_SHIFT); 941 } else { 942 pRAID_Context->flow_specific.r56_arm_map |= 943 (u16)(rightmostParityArm << RAID_CTX_R56_P_ARM_SHIFT); 944 } 945 946 pRAID_Context->reg_lock_row_lba = cpu_to_le64(rowNum); 947 pRAID_Context->flow_specific.r56_arm_map |= 948 (u16)(logArm << RAID_CTX_R56_LOG_ARM_SHIFT); 949 cpu_to_le16s(&pRAID_Context->flow_specific.r56_arm_map); 950 pRAID_Context->span_arm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | dataArm; 951 pRAID_Context->raid_flags = (MR_RAID_FLAGS_IO_SUB_TYPE_R56_DIV_OFFLOAD << 952 MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT); 953 954 return; 955 } 956 957 /* 958 ****************************************************************************** 959 * 960 * MR_BuildRaidContext function 961 * 962 * This function will initiate command processing. The start/end row and strip 963 * information is calculated then the lock is acquired. 964 * This function will return 0 if region lock was acquired OR return num strips 965 */ 966 u8 967 MR_BuildRaidContext(struct megasas_instance *instance, 968 struct IO_REQUEST_INFO *io_info, 969 struct RAID_CONTEXT *pRAID_Context, 970 struct MR_DRV_RAID_MAP_ALL *map, u8 **raidLUN) 971 { 972 struct fusion_context *fusion; 973 struct MR_LD_RAID *raid; 974 u32 stripSize, stripe_mask; 975 u64 endLba, endStrip, endRow, start_row, start_strip; 976 u64 regStart; 977 u32 regSize; 978 u8 num_strips, numRows; 979 u16 ref_in_start_stripe, ref_in_end_stripe; 980 u64 ldStartBlock; 981 u32 numBlocks, ldTgtId; 982 u8 isRead; 983 u8 retval = 0; 984 u8 startlba_span = SPAN_INVALID; 985 u64 *pdBlock = &io_info->pdBlock; 986 u16 ld; 987 988 ldStartBlock = io_info->ldStartBlock; 989 numBlocks = io_info->numBlocks; 990 ldTgtId = io_info->ldTgtId; 991 isRead = io_info->isRead; 992 io_info->IoforUnevenSpan = 0; 993 io_info->start_span = SPAN_INVALID; 994 fusion = instance->ctrl_context; 995 996 ld = MR_TargetIdToLdGet(ldTgtId, map); 997 raid = MR_LdRaidGet(ld, map); 998 /*check read ahead bit*/ 999 io_info->ra_capable = raid->capability.ra_capable; 1000 1001 /* 1002 * if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero 1003 * return FALSE 1004 */ 1005 if (raid->rowDataSize == 0) { 1006 if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0) 1007 return false; 1008 else if (instance->UnevenSpanSupport) { 1009 io_info->IoforUnevenSpan = 1; 1010 } else { 1011 dev_info(&instance->pdev->dev, 1012 "raid->rowDataSize is 0, but has SPAN[0]" 1013 "rowDataSize = 0x%0x," 1014 "but there is _NO_ UnevenSpanSupport\n", 1015 MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize); 1016 return false; 1017 } 1018 } 1019 1020 stripSize = 1 << raid->stripeShift; 1021 stripe_mask = stripSize-1; 1022 1023 io_info->data_arms = raid->rowDataSize; 1024 1025 /* 1026 * calculate starting row and stripe, and number of strips and rows 1027 */ 1028 start_strip = ldStartBlock >> raid->stripeShift; 1029 ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask); 1030 endLba = ldStartBlock + numBlocks - 1; 1031 ref_in_end_stripe = (u16)(endLba & stripe_mask); 1032 endStrip = endLba >> raid->stripeShift; 1033 num_strips = (u8)(endStrip - start_strip + 1); /* End strip */ 1034 1035 if (io_info->IoforUnevenSpan) { 1036 start_row = get_row_from_strip(instance, ld, start_strip, map); 1037 endRow = get_row_from_strip(instance, ld, endStrip, map); 1038 if (start_row == -1ULL || endRow == -1ULL) { 1039 dev_info(&instance->pdev->dev, "return from %s %d." 1040 "Send IO w/o region lock.\n", 1041 __func__, __LINE__); 1042 return false; 1043 } 1044 1045 if (raid->spanDepth == 1) { 1046 startlba_span = 0; 1047 *pdBlock = start_row << raid->stripeShift; 1048 } else 1049 startlba_span = (u8)mr_spanset_get_span_block(instance, 1050 ld, start_row, pdBlock, map); 1051 if (startlba_span == SPAN_INVALID) { 1052 dev_info(&instance->pdev->dev, "return from %s %d" 1053 "for row 0x%llx,start strip %llx" 1054 "endSrip %llx\n", __func__, __LINE__, 1055 (unsigned long long)start_row, 1056 (unsigned long long)start_strip, 1057 (unsigned long long)endStrip); 1058 return false; 1059 } 1060 io_info->start_span = startlba_span; 1061 io_info->start_row = start_row; 1062 } else { 1063 start_row = mega_div64_32(start_strip, raid->rowDataSize); 1064 endRow = mega_div64_32(endStrip, raid->rowDataSize); 1065 } 1066 numRows = (u8)(endRow - start_row + 1); 1067 1068 /* 1069 * calculate region info. 1070 */ 1071 1072 /* assume region is at the start of the first row */ 1073 regStart = start_row << raid->stripeShift; 1074 /* assume this IO needs the full row - we'll adjust if not true */ 1075 regSize = stripSize; 1076 1077 io_info->do_fp_rlbypass = raid->capability.fpBypassRegionLock; 1078 1079 /* Check if we can send this I/O via FastPath */ 1080 if (raid->capability.fpCapable) { 1081 if (isRead) 1082 io_info->fpOkForIo = (raid->capability.fpReadCapable && 1083 ((num_strips == 1) || 1084 raid->capability. 1085 fpReadAcrossStripe)); 1086 else 1087 io_info->fpOkForIo = (raid->capability.fpWriteCapable && 1088 ((num_strips == 1) || 1089 raid->capability. 1090 fpWriteAcrossStripe)); 1091 } else 1092 io_info->fpOkForIo = false; 1093 1094 if (numRows == 1) { 1095 /* single-strip IOs can always lock only the data needed */ 1096 if (num_strips == 1) { 1097 regStart += ref_in_start_stripe; 1098 regSize = numBlocks; 1099 } 1100 /* multi-strip IOs always need to full stripe locked */ 1101 } else if (io_info->IoforUnevenSpan == 0) { 1102 /* 1103 * For Even span region lock optimization. 1104 * If the start strip is the last in the start row 1105 */ 1106 if (start_strip == (start_row + 1) * raid->rowDataSize - 1) { 1107 regStart += ref_in_start_stripe; 1108 /* initialize count to sectors from startref to end 1109 of strip */ 1110 regSize = stripSize - ref_in_start_stripe; 1111 } 1112 1113 /* add complete rows in the middle of the transfer */ 1114 if (numRows > 2) 1115 regSize += (numRows-2) << raid->stripeShift; 1116 1117 /* if IO ends within first strip of last row*/ 1118 if (endStrip == endRow*raid->rowDataSize) 1119 regSize += ref_in_end_stripe+1; 1120 else 1121 regSize += stripSize; 1122 } else { 1123 /* 1124 * For Uneven span region lock optimization. 1125 * If the start strip is the last in the start row 1126 */ 1127 if (start_strip == (get_strip_from_row(instance, ld, start_row, map) + 1128 SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) { 1129 regStart += ref_in_start_stripe; 1130 /* initialize count to sectors from 1131 * startRef to end of strip 1132 */ 1133 regSize = stripSize - ref_in_start_stripe; 1134 } 1135 /* Add complete rows in the middle of the transfer*/ 1136 1137 if (numRows > 2) 1138 /* Add complete rows in the middle of the transfer*/ 1139 regSize += (numRows-2) << raid->stripeShift; 1140 1141 /* if IO ends within first strip of last row */ 1142 if (endStrip == get_strip_from_row(instance, ld, endRow, map)) 1143 regSize += ref_in_end_stripe + 1; 1144 else 1145 regSize += stripSize; 1146 } 1147 1148 pRAID_Context->timeout_value = 1149 cpu_to_le16(raid->fpIoTimeoutForLd ? 1150 raid->fpIoTimeoutForLd : 1151 map->raidMap.fpPdIoTimeoutSec); 1152 if (instance->adapter_type == INVADER_SERIES) 1153 pRAID_Context->reg_lock_flags = (isRead) ? 1154 raid->regTypeReqOnRead : raid->regTypeReqOnWrite; 1155 else if (instance->adapter_type == THUNDERBOLT_SERIES) 1156 pRAID_Context->reg_lock_flags = (isRead) ? 1157 REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite; 1158 pRAID_Context->virtual_disk_tgt_id = raid->targetId; 1159 pRAID_Context->reg_lock_row_lba = cpu_to_le64(regStart); 1160 pRAID_Context->reg_lock_length = cpu_to_le32(regSize); 1161 pRAID_Context->config_seq_num = raid->seqNum; 1162 /* save pointer to raid->LUN array */ 1163 *raidLUN = raid->LUN; 1164 1165 /* Aero R5/6 Division Offload for WRITE */ 1166 if (fusion->r56_div_offload && (raid->level >= 5) && !isRead) { 1167 mr_get_phy_params_r56_rmw(instance, ld, start_strip, io_info, 1168 (struct RAID_CONTEXT_G35 *)pRAID_Context, 1169 map); 1170 return true; 1171 } 1172 1173 /*Get Phy Params only if FP capable, or else leave it to MR firmware 1174 to do the calculation.*/ 1175 if (io_info->fpOkForIo) { 1176 retval = io_info->IoforUnevenSpan ? 1177 mr_spanset_get_phy_params(instance, ld, 1178 start_strip, ref_in_start_stripe, 1179 io_info, pRAID_Context, map) : 1180 MR_GetPhyParams(instance, ld, start_strip, 1181 ref_in_start_stripe, io_info, 1182 pRAID_Context, map); 1183 /* If IO on an invalid Pd, then FP is not possible.*/ 1184 if (io_info->devHandle == MR_DEVHANDLE_INVALID) 1185 io_info->fpOkForIo = false; 1186 return retval; 1187 } else if (isRead) { 1188 uint stripIdx; 1189 for (stripIdx = 0; stripIdx < num_strips; stripIdx++) { 1190 retval = io_info->IoforUnevenSpan ? 1191 mr_spanset_get_phy_params(instance, ld, 1192 start_strip + stripIdx, 1193 ref_in_start_stripe, io_info, 1194 pRAID_Context, map) : 1195 MR_GetPhyParams(instance, ld, 1196 start_strip + stripIdx, ref_in_start_stripe, 1197 io_info, pRAID_Context, map); 1198 if (!retval) 1199 return true; 1200 } 1201 } 1202 return true; 1203 } 1204 1205 /* 1206 ****************************************************************************** 1207 * 1208 * This routine pepare spanset info from Valid Raid map and store it into 1209 * local copy of ldSpanInfo per instance data structure. 1210 * 1211 * Inputs : 1212 * map - LD map 1213 * ldSpanInfo - ldSpanInfo per HBA instance 1214 * 1215 */ 1216 void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, 1217 PLD_SPAN_INFO ldSpanInfo) 1218 { 1219 u8 span, count; 1220 u32 element, span_row_width; 1221 u64 span_row; 1222 struct MR_LD_RAID *raid; 1223 LD_SPAN_SET *span_set, *span_set_prev; 1224 struct MR_QUAD_ELEMENT *quad; 1225 int ldCount; 1226 u16 ld; 1227 1228 1229 for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { 1230 ld = MR_TargetIdToLdGet(ldCount, map); 1231 if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) 1232 continue; 1233 raid = MR_LdRaidGet(ld, map); 1234 for (element = 0; element < MAX_QUAD_DEPTH; element++) { 1235 for (span = 0; span < raid->spanDepth; span++) { 1236 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 1237 block_span_info.noElements) < 1238 element + 1) 1239 continue; 1240 span_set = &(ldSpanInfo[ld].span_set[element]); 1241 quad = &map->raidMap.ldSpanMap[ld]. 1242 spanBlock[span].block_span_info. 1243 quad[element]; 1244 1245 span_set->diff = le32_to_cpu(quad->diff); 1246 1247 for (count = 0, span_row_width = 0; 1248 count < raid->spanDepth; count++) { 1249 if (le32_to_cpu(map->raidMap.ldSpanMap[ld]. 1250 spanBlock[count]. 1251 block_span_info. 1252 noElements) >= element + 1) { 1253 span_set->strip_offset[count] = 1254 span_row_width; 1255 span_row_width += 1256 MR_LdSpanPtrGet 1257 (ld, count, map)->spanRowDataSize; 1258 } 1259 } 1260 1261 span_set->span_row_data_width = span_row_width; 1262 span_row = mega_div64_32(((le64_to_cpu(quad->logEnd) - 1263 le64_to_cpu(quad->logStart)) + le32_to_cpu(quad->diff)), 1264 le32_to_cpu(quad->diff)); 1265 1266 if (element == 0) { 1267 span_set->log_start_lba = 0; 1268 span_set->log_end_lba = 1269 ((span_row << raid->stripeShift) 1270 * span_row_width) - 1; 1271 1272 span_set->span_row_start = 0; 1273 span_set->span_row_end = span_row - 1; 1274 1275 span_set->data_strip_start = 0; 1276 span_set->data_strip_end = 1277 (span_row * span_row_width) - 1; 1278 1279 span_set->data_row_start = 0; 1280 span_set->data_row_end = 1281 (span_row * le32_to_cpu(quad->diff)) - 1; 1282 } else { 1283 span_set_prev = &(ldSpanInfo[ld]. 1284 span_set[element - 1]); 1285 span_set->log_start_lba = 1286 span_set_prev->log_end_lba + 1; 1287 span_set->log_end_lba = 1288 span_set->log_start_lba + 1289 ((span_row << raid->stripeShift) 1290 * span_row_width) - 1; 1291 1292 span_set->span_row_start = 1293 span_set_prev->span_row_end + 1; 1294 span_set->span_row_end = 1295 span_set->span_row_start + span_row - 1; 1296 1297 span_set->data_strip_start = 1298 span_set_prev->data_strip_end + 1; 1299 span_set->data_strip_end = 1300 span_set->data_strip_start + 1301 (span_row * span_row_width) - 1; 1302 1303 span_set->data_row_start = 1304 span_set_prev->data_row_end + 1; 1305 span_set->data_row_end = 1306 span_set->data_row_start + 1307 (span_row * le32_to_cpu(quad->diff)) - 1; 1308 } 1309 break; 1310 } 1311 if (span == raid->spanDepth) 1312 break; 1313 } 1314 } 1315 } 1316 1317 void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map, 1318 struct LD_LOAD_BALANCE_INFO *lbInfo) 1319 { 1320 int ldCount; 1321 u16 ld; 1322 struct MR_LD_RAID *raid; 1323 1324 if (lb_pending_cmds > 128 || lb_pending_cmds < 1) 1325 lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; 1326 1327 for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { 1328 ld = MR_TargetIdToLdGet(ldCount, drv_map); 1329 if (ld >= MAX_LOGICAL_DRIVES_EXT - 1) { 1330 lbInfo[ldCount].loadBalanceFlag = 0; 1331 continue; 1332 } 1333 1334 raid = MR_LdRaidGet(ld, drv_map); 1335 if ((raid->level != 1) || 1336 (raid->ldState != MR_LD_STATE_OPTIMAL)) { 1337 lbInfo[ldCount].loadBalanceFlag = 0; 1338 continue; 1339 } 1340 lbInfo[ldCount].loadBalanceFlag = 1; 1341 } 1342 } 1343 1344 static u8 megasas_get_best_arm_pd(struct megasas_instance *instance, 1345 struct LD_LOAD_BALANCE_INFO *lbInfo, 1346 struct IO_REQUEST_INFO *io_info, 1347 struct MR_DRV_RAID_MAP_ALL *drv_map) 1348 { 1349 struct MR_LD_RAID *raid; 1350 u16 pd1_dev_handle; 1351 u16 pend0, pend1, ld; 1352 u64 diff0, diff1; 1353 u8 bestArm, pd0, pd1, span, arm; 1354 u32 arRef, span_row_size; 1355 1356 u64 block = io_info->ldStartBlock; 1357 u32 count = io_info->numBlocks; 1358 1359 span = ((io_info->span_arm & RAID_CTX_SPANARM_SPAN_MASK) 1360 >> RAID_CTX_SPANARM_SPAN_SHIFT); 1361 arm = (io_info->span_arm & RAID_CTX_SPANARM_ARM_MASK); 1362 1363 ld = MR_TargetIdToLdGet(io_info->ldTgtId, drv_map); 1364 raid = MR_LdRaidGet(ld, drv_map); 1365 span_row_size = instance->UnevenSpanSupport ? 1366 SPAN_ROW_SIZE(drv_map, ld, span) : raid->rowSize; 1367 1368 arRef = MR_LdSpanArrayGet(ld, span, drv_map); 1369 pd0 = MR_ArPdGet(arRef, arm, drv_map); 1370 pd1 = MR_ArPdGet(arRef, (arm + 1) >= span_row_size ? 1371 (arm + 1 - span_row_size) : arm + 1, drv_map); 1372 1373 /* Get PD1 Dev Handle */ 1374 1375 pd1_dev_handle = MR_PdDevHandleGet(pd1, drv_map); 1376 1377 if (pd1_dev_handle == MR_DEVHANDLE_INVALID) { 1378 bestArm = arm; 1379 } else { 1380 /* get the pending cmds for the data and mirror arms */ 1381 pend0 = atomic_read(&lbInfo->scsi_pending_cmds[pd0]); 1382 pend1 = atomic_read(&lbInfo->scsi_pending_cmds[pd1]); 1383 1384 /* Determine the disk whose head is nearer to the req. block */ 1385 diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[pd0]); 1386 diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[pd1]); 1387 bestArm = (diff0 <= diff1 ? arm : arm ^ 1); 1388 1389 /* Make balance count from 16 to 4 to 1390 * keep driver in sync with Firmware 1391 */ 1392 if ((bestArm == arm && pend0 > pend1 + lb_pending_cmds) || 1393 (bestArm != arm && pend1 > pend0 + lb_pending_cmds)) 1394 bestArm ^= 1; 1395 1396 /* Update the last accessed block on the correct pd */ 1397 io_info->span_arm = 1398 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | bestArm; 1399 io_info->pd_after_lb = (bestArm == arm) ? pd0 : pd1; 1400 } 1401 1402 lbInfo->last_accessed_block[io_info->pd_after_lb] = block + count - 1; 1403 return io_info->pd_after_lb; 1404 } 1405 1406 __le16 get_updated_dev_handle(struct megasas_instance *instance, 1407 struct LD_LOAD_BALANCE_INFO *lbInfo, 1408 struct IO_REQUEST_INFO *io_info, 1409 struct MR_DRV_RAID_MAP_ALL *drv_map) 1410 { 1411 u8 arm_pd; 1412 __le16 devHandle; 1413 1414 /* get best new arm (PD ID) */ 1415 arm_pd = megasas_get_best_arm_pd(instance, lbInfo, io_info, drv_map); 1416 devHandle = MR_PdDevHandleGet(arm_pd, drv_map); 1417 io_info->pd_interface = MR_PdInterfaceTypeGet(arm_pd, drv_map); 1418 atomic_inc(&lbInfo->scsi_pending_cmds[arm_pd]); 1419 1420 return devHandle; 1421 } 1422