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 48static unsigned int lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; 49module_param(lb_pending_cmds, int, 0444); 50MODULE_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 */ 62static void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, 63 PLD_SPAN_INFO ldSpanInfo); 64static 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); 67static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, 68 u64 strip, struct MR_DRV_RAID_MAP_ALL *map); 69 70u32 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 **/ 89static 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 101struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) 102{ 103 return &map->raidMap.ldSpanMap[ld].ldRaid; 104} 105 106static 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 113static 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 118u16 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 123u16 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 133static u8 MR_PdInterfaceTypeGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) 134{ 135 return map->raidMap.devHndlInfo[pd].interfaceType; 136} 137 138u16 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 143u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_DRV_RAID_MAP_ALL *map) 144{ 145 return map->raidMap.ldTgtIdToLd[ldTgtId]; 146} 147 148static 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 */ 157static 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 */ 302u8 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 = struct_size_t(struct MR_FW_RAID_MAP, 330 ldSpanMap, 331 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 memcpy(instance->ld_ids_prev, 353 instance->ld_ids_from_raidmap, 354 sizeof(instance->ld_ids_from_raidmap)); 355 memset(instance->ld_ids_from_raidmap, 0xff, MEGASAS_MAX_LD_IDS); 356 /*Convert Raid capability values to CPU arch */ 357 for (i = 0; (num_lds > 0) && (i < MAX_LOGICAL_DRIVES_EXT); i++) { 358 ld = MR_TargetIdToLdGet(i, drv_map); 359 360 /* For non existing VDs, iterate to next VD*/ 361 if (ld >= MEGASAS_MAX_SUPPORTED_LD_IDS) 362 continue; 363 364 raid = MR_LdRaidGet(ld, drv_map); 365 le32_to_cpus((u32 *)&raid->capability); 366 instance->ld_ids_from_raidmap[i] = i; 367 num_lds--; 368 } 369 370 return 1; 371} 372 373static u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk, 374 struct MR_DRV_RAID_MAP_ALL *map) 375{ 376 struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map); 377 struct MR_QUAD_ELEMENT *quad; 378 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 379 u32 span, j; 380 381 for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) { 382 383 for (j = 0; j < le32_to_cpu(pSpanBlock->block_span_info.noElements); j++) { 384 quad = &pSpanBlock->block_span_info.quad[j]; 385 386 if (le32_to_cpu(quad->diff) == 0) 387 return SPAN_INVALID; 388 if (le64_to_cpu(quad->logStart) <= row && row <= 389 le64_to_cpu(quad->logEnd) && (mega_mod64(row - le64_to_cpu(quad->logStart), 390 le32_to_cpu(quad->diff))) == 0) { 391 if (span_blk != NULL) { 392 u64 blk; 393 blk = mega_div64_32((row-le64_to_cpu(quad->logStart)), le32_to_cpu(quad->diff)); 394 395 blk = (blk + le64_to_cpu(quad->offsetInSpan)) << raid->stripeShift; 396 *span_blk = blk; 397 } 398 return span; 399 } 400 } 401 } 402 return SPAN_INVALID; 403} 404 405/* 406****************************************************************************** 407* 408* This routine calculates the Span block for given row using spanset. 409* 410* Inputs : 411* instance - HBA instance 412* ld - Logical drive number 413* row - Row number 414* map - LD map 415* 416* Outputs : 417* 418* span - Span number 419* block - Absolute Block number in the physical disk 420* div_error - Devide error code. 421*/ 422 423static u32 mr_spanset_get_span_block(struct megasas_instance *instance, 424 u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL *map) 425{ 426 struct fusion_context *fusion = instance->ctrl_context; 427 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 428 LD_SPAN_SET *span_set; 429 struct MR_QUAD_ELEMENT *quad; 430 u32 span, info; 431 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 432 433 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 434 span_set = &(ldSpanInfo[ld].span_set[info]); 435 436 if (span_set->span_row_data_width == 0) 437 break; 438 439 if (row > span_set->data_row_end) 440 continue; 441 442 for (span = 0; span < raid->spanDepth; span++) 443 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 444 block_span_info.noElements) >= info+1) { 445 quad = &map->raidMap.ldSpanMap[ld]. 446 spanBlock[span]. 447 block_span_info.quad[info]; 448 if (le32_to_cpu(quad->diff) == 0) 449 return SPAN_INVALID; 450 if (le64_to_cpu(quad->logStart) <= row && 451 row <= le64_to_cpu(quad->logEnd) && 452 (mega_mod64(row - le64_to_cpu(quad->logStart), 453 le32_to_cpu(quad->diff))) == 0) { 454 if (span_blk != NULL) { 455 u64 blk; 456 blk = mega_div64_32 457 ((row - le64_to_cpu(quad->logStart)), 458 le32_to_cpu(quad->diff)); 459 blk = (blk + le64_to_cpu(quad->offsetInSpan)) 460 << raid->stripeShift; 461 *span_blk = blk; 462 } 463 return span; 464 } 465 } 466 } 467 return SPAN_INVALID; 468} 469 470/* 471****************************************************************************** 472* 473* This routine calculates the row for given strip using spanset. 474* 475* Inputs : 476* instance - HBA instance 477* ld - Logical drive number 478* Strip - Strip 479* map - LD map 480* 481* Outputs : 482* 483* row - row associated with strip 484*/ 485 486static u64 get_row_from_strip(struct megasas_instance *instance, 487 u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) 488{ 489 struct fusion_context *fusion = instance->ctrl_context; 490 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 491 LD_SPAN_SET *span_set; 492 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 493 u32 info, strip_offset, span, span_offset; 494 u64 span_set_Strip, span_set_Row, retval; 495 496 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 497 span_set = &(ldSpanInfo[ld].span_set[info]); 498 499 if (span_set->span_row_data_width == 0) 500 break; 501 if (strip > span_set->data_strip_end) 502 continue; 503 504 span_set_Strip = strip - span_set->data_strip_start; 505 strip_offset = mega_mod64(span_set_Strip, 506 span_set->span_row_data_width); 507 span_set_Row = mega_div64_32(span_set_Strip, 508 span_set->span_row_data_width) * span_set->diff; 509 for (span = 0, span_offset = 0; span < raid->spanDepth; span++) 510 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 511 block_span_info.noElements) >= info+1) { 512 if (strip_offset >= 513 span_set->strip_offset[span]) 514 span_offset++; 515 else 516 break; 517 } 518 519 retval = (span_set->data_row_start + span_set_Row + 520 (span_offset - 1)); 521 return retval; 522 } 523 return -1LLU; 524} 525 526 527/* 528****************************************************************************** 529* 530* This routine calculates the Start Strip for given row using spanset. 531* 532* Inputs : 533* instance - HBA instance 534* ld - Logical drive number 535* row - Row number 536* map - LD map 537* 538* Outputs : 539* 540* Strip - Start strip associated with row 541*/ 542 543static u64 get_strip_from_row(struct megasas_instance *instance, 544 u32 ld, u64 row, struct MR_DRV_RAID_MAP_ALL *map) 545{ 546 struct fusion_context *fusion = instance->ctrl_context; 547 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 548 LD_SPAN_SET *span_set; 549 struct MR_QUAD_ELEMENT *quad; 550 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 551 u32 span, info; 552 u64 strip; 553 554 for (info = 0; info < MAX_QUAD_DEPTH; info++) { 555 span_set = &(ldSpanInfo[ld].span_set[info]); 556 557 if (span_set->span_row_data_width == 0) 558 break; 559 if (row > span_set->data_row_end) 560 continue; 561 562 for (span = 0; span < raid->spanDepth; span++) 563 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 564 block_span_info.noElements) >= info+1) { 565 quad = &map->raidMap.ldSpanMap[ld]. 566 spanBlock[span].block_span_info.quad[info]; 567 if (le64_to_cpu(quad->logStart) <= row && 568 row <= le64_to_cpu(quad->logEnd) && 569 mega_mod64((row - le64_to_cpu(quad->logStart)), 570 le32_to_cpu(quad->diff)) == 0) { 571 strip = mega_div64_32 572 (((row - span_set->data_row_start) 573 - le64_to_cpu(quad->logStart)), 574 le32_to_cpu(quad->diff)); 575 strip *= span_set->span_row_data_width; 576 strip += span_set->data_strip_start; 577 strip += span_set->strip_offset[span]; 578 return strip; 579 } 580 } 581 } 582 dev_err(&instance->pdev->dev, "get_strip_from_row" 583 "returns invalid strip for ld=%x, row=%lx\n", 584 ld, (long unsigned int)row); 585 return -1; 586} 587 588/* 589****************************************************************************** 590* 591* This routine calculates the Physical Arm for given strip using spanset. 592* 593* Inputs : 594* instance - HBA instance 595* ld - Logical drive number 596* strip - Strip 597* map - LD map 598* 599* Outputs : 600* 601* Phys Arm - Phys Arm associated with strip 602*/ 603 604static u32 get_arm_from_strip(struct megasas_instance *instance, 605 u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) 606{ 607 struct fusion_context *fusion = instance->ctrl_context; 608 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 609 LD_SPAN_SET *span_set; 610 PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; 611 u32 info, strip_offset, span, span_offset, retval; 612 613 for (info = 0 ; info < MAX_QUAD_DEPTH; info++) { 614 span_set = &(ldSpanInfo[ld].span_set[info]); 615 616 if (span_set->span_row_data_width == 0) 617 break; 618 if (strip > span_set->data_strip_end) 619 continue; 620 621 strip_offset = (uint)mega_mod64 622 ((strip - span_set->data_strip_start), 623 span_set->span_row_data_width); 624 625 for (span = 0, span_offset = 0; span < raid->spanDepth; span++) 626 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 627 block_span_info.noElements) >= info+1) { 628 if (strip_offset >= 629 span_set->strip_offset[span]) 630 span_offset = 631 span_set->strip_offset[span]; 632 else 633 break; 634 } 635 636 retval = (strip_offset - span_offset); 637 return retval; 638 } 639 640 dev_err(&instance->pdev->dev, "get_arm_from_strip" 641 "returns invalid arm for ld=%x strip=%lx\n", 642 ld, (long unsigned int)strip); 643 644 return -1; 645} 646 647/* This Function will return Phys arm */ 648static u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe, 649 struct MR_DRV_RAID_MAP_ALL *map) 650{ 651 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 652 /* Need to check correct default value */ 653 u32 arm = 0; 654 655 switch (raid->level) { 656 case 0: 657 case 5: 658 case 6: 659 arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span)); 660 break; 661 case 1: 662 /* start with logical arm */ 663 arm = get_arm_from_strip(instance, ld, stripe, map); 664 if (arm != -1U) 665 arm *= 2; 666 break; 667 } 668 669 return arm; 670} 671 672 673/* 674****************************************************************************** 675* 676* This routine calculates the arm, span and block for the specified stripe and 677* reference in stripe using spanset 678* 679* Inputs : 680* 681* ld - Logical drive number 682* stripRow - Stripe number 683* stripRef - Reference in stripe 684* 685* Outputs : 686* 687* span - Span number 688* block - Absolute Block number in the physical disk 689*/ 690static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, 691 u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, 692 struct RAID_CONTEXT *pRAID_Context, 693 struct MR_DRV_RAID_MAP_ALL *map) 694{ 695 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 696 u32 pd, arRef, r1_alt_pd; 697 u8 physArm, span; 698 u64 row; 699 u8 retval = true; 700 u64 *pdBlock = &io_info->pdBlock; 701 __le16 *pDevHandle = &io_info->devHandle; 702 u8 *pPdInterface = &io_info->pd_interface; 703 u32 logArm, rowMod, armQ, arm; 704 705 *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); 706 707 /*Get row and span from io_info for Uneven Span IO.*/ 708 row = io_info->start_row; 709 span = io_info->start_span; 710 711 712 if (raid->level == 6) { 713 logArm = get_arm_from_strip(instance, ld, stripRow, map); 714 if (logArm == -1U) 715 return false; 716 rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span)); 717 armQ = SPAN_ROW_SIZE(map, ld, span) - 1 - rowMod; 718 arm = armQ + 1 + logArm; 719 if (arm >= SPAN_ROW_SIZE(map, ld, span)) 720 arm -= SPAN_ROW_SIZE(map, ld, span); 721 physArm = (u8)arm; 722 } else 723 /* Calculate the arm */ 724 physArm = get_arm(instance, ld, span, stripRow, map); 725 if (physArm == 0xFF) 726 return false; 727 728 arRef = MR_LdSpanArrayGet(ld, span, map); 729 pd = MR_ArPdGet(arRef, physArm, map); 730 731 if (pd != MR_PD_INVALID) { 732 *pDevHandle = MR_PdDevHandleGet(pd, map); 733 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 734 /* get second pd also for raid 1/10 fast path writes*/ 735 if ((instance->adapter_type >= VENTURA_SERIES) && 736 (raid->level == 1) && 737 !io_info->isRead) { 738 r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); 739 if (r1_alt_pd != MR_PD_INVALID) 740 io_info->r1_alt_dev_handle = 741 MR_PdDevHandleGet(r1_alt_pd, map); 742 } 743 } else { 744 if ((raid->level >= 5) && 745 ((instance->adapter_type == THUNDERBOLT_SERIES) || 746 ((instance->adapter_type == INVADER_SERIES) && 747 (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) 748 pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; 749 else if (raid->level == 1) { 750 physArm = physArm + 1; 751 pd = MR_ArPdGet(arRef, physArm, map); 752 if (pd != MR_PD_INVALID) { 753 *pDevHandle = MR_PdDevHandleGet(pd, map); 754 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 755 } 756 } 757 } 758 759 *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); 760 if (instance->adapter_type >= VENTURA_SERIES) { 761 ((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = 762 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 763 io_info->span_arm = 764 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 765 } else { 766 pRAID_Context->span_arm = 767 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 768 io_info->span_arm = pRAID_Context->span_arm; 769 } 770 io_info->pd_after_lb = pd; 771 return retval; 772} 773 774/* 775****************************************************************************** 776* 777* This routine calculates the arm, span and block for the specified stripe and 778* reference in stripe. 779* 780* Inputs : 781* 782* ld - Logical drive number 783* stripRow - Stripe number 784* stripRef - Reference in stripe 785* 786* Outputs : 787* 788* span - Span number 789* block - Absolute Block number in the physical disk 790*/ 791static u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow, 792 u16 stripRef, struct IO_REQUEST_INFO *io_info, 793 struct RAID_CONTEXT *pRAID_Context, 794 struct MR_DRV_RAID_MAP_ALL *map) 795{ 796 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 797 u32 pd, arRef, r1_alt_pd; 798 u8 physArm, span; 799 u64 row; 800 u8 retval = true; 801 u64 *pdBlock = &io_info->pdBlock; 802 __le16 *pDevHandle = &io_info->devHandle; 803 u8 *pPdInterface = &io_info->pd_interface; 804 805 *pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); 806 807 row = mega_div64_32(stripRow, raid->rowDataSize); 808 809 if (raid->level == 6) { 810 /* logical arm within row */ 811 u32 logArm = mega_mod64(stripRow, raid->rowDataSize); 812 u32 rowMod, armQ, arm; 813 814 if (raid->rowSize == 0) 815 return false; 816 /* get logical row mod */ 817 rowMod = mega_mod64(row, raid->rowSize); 818 armQ = raid->rowSize-1-rowMod; /* index of Q drive */ 819 arm = armQ+1+logArm; /* data always logically follows Q */ 820 if (arm >= raid->rowSize) /* handle wrap condition */ 821 arm -= raid->rowSize; 822 physArm = (u8)arm; 823 } else { 824 if (raid->modFactor == 0) 825 return false; 826 physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow, 827 raid->modFactor), 828 map); 829 } 830 831 if (raid->spanDepth == 1) { 832 span = 0; 833 *pdBlock = row << raid->stripeShift; 834 } else { 835 span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map); 836 if (span == SPAN_INVALID) 837 return false; 838 } 839 840 /* Get the array on which this span is present */ 841 arRef = MR_LdSpanArrayGet(ld, span, map); 842 pd = MR_ArPdGet(arRef, physArm, map); /* Get the pd */ 843 844 if (pd != MR_PD_INVALID) { 845 /* Get dev handle from Pd. */ 846 *pDevHandle = MR_PdDevHandleGet(pd, map); 847 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 848 /* get second pd also for raid 1/10 fast path writes*/ 849 if ((instance->adapter_type >= VENTURA_SERIES) && 850 (raid->level == 1) && 851 !io_info->isRead) { 852 r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); 853 if (r1_alt_pd != MR_PD_INVALID) 854 io_info->r1_alt_dev_handle = 855 MR_PdDevHandleGet(r1_alt_pd, map); 856 } 857 } else { 858 if ((raid->level >= 5) && 859 ((instance->adapter_type == THUNDERBOLT_SERIES) || 860 ((instance->adapter_type == INVADER_SERIES) && 861 (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) 862 pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; 863 else if (raid->level == 1) { 864 /* Get alternate Pd. */ 865 physArm = physArm + 1; 866 pd = MR_ArPdGet(arRef, physArm, map); 867 if (pd != MR_PD_INVALID) { 868 /* Get dev handle from Pd */ 869 *pDevHandle = MR_PdDevHandleGet(pd, map); 870 *pPdInterface = MR_PdInterfaceTypeGet(pd, map); 871 } 872 } 873 } 874 875 *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); 876 if (instance->adapter_type >= VENTURA_SERIES) { 877 ((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = 878 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 879 io_info->span_arm = 880 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 881 } else { 882 pRAID_Context->span_arm = 883 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; 884 io_info->span_arm = pRAID_Context->span_arm; 885 } 886 io_info->pd_after_lb = pd; 887 return retval; 888} 889 890/* 891 * mr_get_phy_params_r56_rmw - Calculate parameters for R56 CTIO write operation 892 * @instance: Adapter soft state 893 * @ld: LD index 894 * @stripNo: Strip Number 895 * @io_info: IO info structure pointer 896 * pRAID_Context: RAID context pointer 897 * map: RAID map pointer 898 * 899 * This routine calculates the logical arm, data Arm, row number and parity arm 900 * for R56 CTIO write operation. 901 */ 902static void mr_get_phy_params_r56_rmw(struct megasas_instance *instance, 903 u32 ld, u64 stripNo, 904 struct IO_REQUEST_INFO *io_info, 905 struct RAID_CONTEXT_G35 *pRAID_Context, 906 struct MR_DRV_RAID_MAP_ALL *map) 907{ 908 struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); 909 u8 span, dataArms, arms, dataArm, logArm; 910 s8 rightmostParityArm, PParityArm; 911 u64 rowNum; 912 u64 *pdBlock = &io_info->pdBlock; 913 914 dataArms = raid->rowDataSize; 915 arms = raid->rowSize; 916 917 rowNum = mega_div64_32(stripNo, dataArms); 918 /* parity disk arm, first arm is 0 */ 919 rightmostParityArm = (arms - 1) - mega_mod64(rowNum, arms); 920 921 /* logical arm within row */ 922 logArm = mega_mod64(stripNo, dataArms); 923 /* physical arm for data */ 924 dataArm = mega_mod64((rightmostParityArm + 1 + logArm), arms); 925 926 if (raid->spanDepth == 1) { 927 span = 0; 928 } else { 929 span = (u8)MR_GetSpanBlock(ld, rowNum, pdBlock, map); 930 if (span == SPAN_INVALID) 931 return; 932 } 933 934 if (raid->level == 6) { 935 /* P Parity arm, note this can go negative adjust if negative */ 936 PParityArm = (arms - 2) - mega_mod64(rowNum, arms); 937 938 if (PParityArm < 0) 939 PParityArm += arms; 940 941 /* rightmostParityArm is P-Parity for RAID 5 and Q-Parity for RAID */ 942 pRAID_Context->flow_specific.r56_arm_map = rightmostParityArm; 943 pRAID_Context->flow_specific.r56_arm_map |= 944 (u16)(PParityArm << RAID_CTX_R56_P_ARM_SHIFT); 945 } else { 946 pRAID_Context->flow_specific.r56_arm_map |= 947 (u16)(rightmostParityArm << RAID_CTX_R56_P_ARM_SHIFT); 948 } 949 950 pRAID_Context->reg_lock_row_lba = cpu_to_le64(rowNum); 951 pRAID_Context->flow_specific.r56_arm_map |= 952 (u16)(logArm << RAID_CTX_R56_LOG_ARM_SHIFT); 953 cpu_to_le16s(&pRAID_Context->flow_specific.r56_arm_map); 954 pRAID_Context->span_arm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | dataArm; 955 pRAID_Context->raid_flags = (MR_RAID_FLAGS_IO_SUB_TYPE_R56_DIV_OFFLOAD << 956 MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT); 957 958 return; 959} 960 961/* 962****************************************************************************** 963* 964* MR_BuildRaidContext function 965* 966* This function will initiate command processing. The start/end row and strip 967* information is calculated then the lock is acquired. 968* This function will return 0 if region lock was acquired OR return num strips 969*/ 970u8 971MR_BuildRaidContext(struct megasas_instance *instance, 972 struct IO_REQUEST_INFO *io_info, 973 struct RAID_CONTEXT *pRAID_Context, 974 struct MR_DRV_RAID_MAP_ALL *map, u8 **raidLUN) 975{ 976 struct fusion_context *fusion; 977 struct MR_LD_RAID *raid; 978 u32 stripSize, stripe_mask; 979 u64 endLba, endStrip, endRow, start_row, start_strip; 980 u64 regStart; 981 u32 regSize; 982 u8 num_strips, numRows; 983 u16 ref_in_start_stripe, ref_in_end_stripe; 984 u64 ldStartBlock; 985 u32 numBlocks, ldTgtId; 986 u8 isRead; 987 u8 retval = 0; 988 u8 startlba_span = SPAN_INVALID; 989 u64 *pdBlock = &io_info->pdBlock; 990 u16 ld; 991 992 ldStartBlock = io_info->ldStartBlock; 993 numBlocks = io_info->numBlocks; 994 ldTgtId = io_info->ldTgtId; 995 isRead = io_info->isRead; 996 io_info->IoforUnevenSpan = 0; 997 io_info->start_span = SPAN_INVALID; 998 fusion = instance->ctrl_context; 999 1000 ld = MR_TargetIdToLdGet(ldTgtId, map); 1001 raid = MR_LdRaidGet(ld, map); 1002 /*check read ahead bit*/ 1003 io_info->ra_capable = raid->capability.ra_capable; 1004 1005 /* 1006 * if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero 1007 * return FALSE 1008 */ 1009 if (raid->rowDataSize == 0) { 1010 if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0) 1011 return false; 1012 else if (instance->UnevenSpanSupport) { 1013 io_info->IoforUnevenSpan = 1; 1014 } else { 1015 dev_info(&instance->pdev->dev, 1016 "raid->rowDataSize is 0, but has SPAN[0]" 1017 "rowDataSize = 0x%0x," 1018 "but there is _NO_ UnevenSpanSupport\n", 1019 MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize); 1020 return false; 1021 } 1022 } 1023 1024 stripSize = 1 << raid->stripeShift; 1025 stripe_mask = stripSize-1; 1026 1027 io_info->data_arms = raid->rowDataSize; 1028 1029 /* 1030 * calculate starting row and stripe, and number of strips and rows 1031 */ 1032 start_strip = ldStartBlock >> raid->stripeShift; 1033 ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask); 1034 endLba = ldStartBlock + numBlocks - 1; 1035 ref_in_end_stripe = (u16)(endLba & stripe_mask); 1036 endStrip = endLba >> raid->stripeShift; 1037 num_strips = (u8)(endStrip - start_strip + 1); /* End strip */ 1038 1039 if (io_info->IoforUnevenSpan) { 1040 start_row = get_row_from_strip(instance, ld, start_strip, map); 1041 endRow = get_row_from_strip(instance, ld, endStrip, map); 1042 if (start_row == -1ULL || endRow == -1ULL) { 1043 dev_info(&instance->pdev->dev, "return from %s %d." 1044 "Send IO w/o region lock.\n", 1045 __func__, __LINE__); 1046 return false; 1047 } 1048 1049 if (raid->spanDepth == 1) { 1050 startlba_span = 0; 1051 *pdBlock = start_row << raid->stripeShift; 1052 } else 1053 startlba_span = (u8)mr_spanset_get_span_block(instance, 1054 ld, start_row, pdBlock, map); 1055 if (startlba_span == SPAN_INVALID) { 1056 dev_info(&instance->pdev->dev, "return from %s %d" 1057 "for row 0x%llx,start strip %llx" 1058 "endSrip %llx\n", __func__, __LINE__, 1059 (unsigned long long)start_row, 1060 (unsigned long long)start_strip, 1061 (unsigned long long)endStrip); 1062 return false; 1063 } 1064 io_info->start_span = startlba_span; 1065 io_info->start_row = start_row; 1066 } else { 1067 start_row = mega_div64_32(start_strip, raid->rowDataSize); 1068 endRow = mega_div64_32(endStrip, raid->rowDataSize); 1069 } 1070 numRows = (u8)(endRow - start_row + 1); 1071 1072 /* 1073 * calculate region info. 1074 */ 1075 1076 /* assume region is at the start of the first row */ 1077 regStart = start_row << raid->stripeShift; 1078 /* assume this IO needs the full row - we'll adjust if not true */ 1079 regSize = stripSize; 1080 1081 io_info->do_fp_rlbypass = raid->capability.fpBypassRegionLock; 1082 1083 /* Check if we can send this I/O via FastPath */ 1084 if (raid->capability.fpCapable) { 1085 if (isRead) 1086 io_info->fpOkForIo = (raid->capability.fpReadCapable && 1087 ((num_strips == 1) || 1088 raid->capability. 1089 fpReadAcrossStripe)); 1090 else 1091 io_info->fpOkForIo = (raid->capability.fpWriteCapable && 1092 ((num_strips == 1) || 1093 raid->capability. 1094 fpWriteAcrossStripe)); 1095 } else 1096 io_info->fpOkForIo = false; 1097 1098 if (numRows == 1) { 1099 /* single-strip IOs can always lock only the data needed */ 1100 if (num_strips == 1) { 1101 regStart += ref_in_start_stripe; 1102 regSize = numBlocks; 1103 } 1104 /* multi-strip IOs always need to full stripe locked */ 1105 } else if (io_info->IoforUnevenSpan == 0) { 1106 /* 1107 * For Even span region lock optimization. 1108 * If the start strip is the last in the start row 1109 */ 1110 if (start_strip == (start_row + 1) * raid->rowDataSize - 1) { 1111 regStart += ref_in_start_stripe; 1112 /* initialize count to sectors from startref to end 1113 of strip */ 1114 regSize = stripSize - ref_in_start_stripe; 1115 } 1116 1117 /* add complete rows in the middle of the transfer */ 1118 if (numRows > 2) 1119 regSize += (numRows-2) << raid->stripeShift; 1120 1121 /* if IO ends within first strip of last row*/ 1122 if (endStrip == endRow*raid->rowDataSize) 1123 regSize += ref_in_end_stripe+1; 1124 else 1125 regSize += stripSize; 1126 } else { 1127 /* 1128 * For Uneven span region lock optimization. 1129 * If the start strip is the last in the start row 1130 */ 1131 if (start_strip == (get_strip_from_row(instance, ld, start_row, map) + 1132 SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) { 1133 regStart += ref_in_start_stripe; 1134 /* initialize count to sectors from 1135 * startRef to end of strip 1136 */ 1137 regSize = stripSize - ref_in_start_stripe; 1138 } 1139 /* Add complete rows in the middle of the transfer*/ 1140 1141 if (numRows > 2) 1142 /* Add complete rows in the middle of the transfer*/ 1143 regSize += (numRows-2) << raid->stripeShift; 1144 1145 /* if IO ends within first strip of last row */ 1146 if (endStrip == get_strip_from_row(instance, ld, endRow, map)) 1147 regSize += ref_in_end_stripe + 1; 1148 else 1149 regSize += stripSize; 1150 } 1151 1152 pRAID_Context->timeout_value = 1153 cpu_to_le16(raid->fpIoTimeoutForLd ? 1154 raid->fpIoTimeoutForLd : 1155 map->raidMap.fpPdIoTimeoutSec); 1156 if (instance->adapter_type == INVADER_SERIES) 1157 pRAID_Context->reg_lock_flags = (isRead) ? 1158 raid->regTypeReqOnRead : raid->regTypeReqOnWrite; 1159 else if (instance->adapter_type == THUNDERBOLT_SERIES) 1160 pRAID_Context->reg_lock_flags = (isRead) ? 1161 REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite; 1162 pRAID_Context->virtual_disk_tgt_id = raid->targetId; 1163 pRAID_Context->reg_lock_row_lba = cpu_to_le64(regStart); 1164 pRAID_Context->reg_lock_length = cpu_to_le32(regSize); 1165 pRAID_Context->config_seq_num = raid->seqNum; 1166 /* save pointer to raid->LUN array */ 1167 *raidLUN = raid->LUN; 1168 1169 /* Aero R5/6 Division Offload for WRITE */ 1170 if (fusion->r56_div_offload && (raid->level >= 5) && !isRead) { 1171 mr_get_phy_params_r56_rmw(instance, ld, start_strip, io_info, 1172 (struct RAID_CONTEXT_G35 *)pRAID_Context, 1173 map); 1174 return true; 1175 } 1176 1177 /*Get Phy Params only if FP capable, or else leave it to MR firmware 1178 to do the calculation.*/ 1179 if (io_info->fpOkForIo) { 1180 retval = io_info->IoforUnevenSpan ? 1181 mr_spanset_get_phy_params(instance, ld, 1182 start_strip, ref_in_start_stripe, 1183 io_info, pRAID_Context, map) : 1184 MR_GetPhyParams(instance, ld, start_strip, 1185 ref_in_start_stripe, io_info, 1186 pRAID_Context, map); 1187 /* If IO on an invalid Pd, then FP is not possible.*/ 1188 if (io_info->devHandle == MR_DEVHANDLE_INVALID) 1189 io_info->fpOkForIo = false; 1190 return retval; 1191 } else if (isRead) { 1192 uint stripIdx; 1193 for (stripIdx = 0; stripIdx < num_strips; stripIdx++) { 1194 retval = io_info->IoforUnevenSpan ? 1195 mr_spanset_get_phy_params(instance, ld, 1196 start_strip + stripIdx, 1197 ref_in_start_stripe, io_info, 1198 pRAID_Context, map) : 1199 MR_GetPhyParams(instance, ld, 1200 start_strip + stripIdx, ref_in_start_stripe, 1201 io_info, pRAID_Context, map); 1202 if (!retval) 1203 return true; 1204 } 1205 } 1206 return true; 1207} 1208 1209/* 1210****************************************************************************** 1211* 1212* This routine pepare spanset info from Valid Raid map and store it into 1213* local copy of ldSpanInfo per instance data structure. 1214* 1215* Inputs : 1216* map - LD map 1217* ldSpanInfo - ldSpanInfo per HBA instance 1218* 1219*/ 1220void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, 1221 PLD_SPAN_INFO ldSpanInfo) 1222{ 1223 u8 span, count; 1224 u32 element, span_row_width; 1225 u64 span_row; 1226 struct MR_LD_RAID *raid; 1227 LD_SPAN_SET *span_set, *span_set_prev; 1228 struct MR_QUAD_ELEMENT *quad; 1229 int ldCount; 1230 u16 ld; 1231 1232 1233 for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { 1234 ld = MR_TargetIdToLdGet(ldCount, map); 1235 if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) 1236 continue; 1237 raid = MR_LdRaidGet(ld, map); 1238 for (element = 0; element < MAX_QUAD_DEPTH; element++) { 1239 for (span = 0; span < raid->spanDepth; span++) { 1240 if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. 1241 block_span_info.noElements) < 1242 element + 1) 1243 continue; 1244 span_set = &(ldSpanInfo[ld].span_set[element]); 1245 quad = &map->raidMap.ldSpanMap[ld]. 1246 spanBlock[span].block_span_info. 1247 quad[element]; 1248 1249 span_set->diff = le32_to_cpu(quad->diff); 1250 1251 for (count = 0, span_row_width = 0; 1252 count < raid->spanDepth; count++) { 1253 if (le32_to_cpu(map->raidMap.ldSpanMap[ld]. 1254 spanBlock[count]. 1255 block_span_info. 1256 noElements) >= element + 1) { 1257 span_set->strip_offset[count] = 1258 span_row_width; 1259 span_row_width += 1260 MR_LdSpanPtrGet 1261 (ld, count, map)->spanRowDataSize; 1262 } 1263 } 1264 1265 span_set->span_row_data_width = span_row_width; 1266 span_row = mega_div64_32(((le64_to_cpu(quad->logEnd) - 1267 le64_to_cpu(quad->logStart)) + le32_to_cpu(quad->diff)), 1268 le32_to_cpu(quad->diff)); 1269 1270 if (element == 0) { 1271 span_set->log_start_lba = 0; 1272 span_set->log_end_lba = 1273 ((span_row << raid->stripeShift) 1274 * span_row_width) - 1; 1275 1276 span_set->span_row_start = 0; 1277 span_set->span_row_end = span_row - 1; 1278 1279 span_set->data_strip_start = 0; 1280 span_set->data_strip_end = 1281 (span_row * span_row_width) - 1; 1282 1283 span_set->data_row_start = 0; 1284 span_set->data_row_end = 1285 (span_row * le32_to_cpu(quad->diff)) - 1; 1286 } else { 1287 span_set_prev = &(ldSpanInfo[ld]. 1288 span_set[element - 1]); 1289 span_set->log_start_lba = 1290 span_set_prev->log_end_lba + 1; 1291 span_set->log_end_lba = 1292 span_set->log_start_lba + 1293 ((span_row << raid->stripeShift) 1294 * span_row_width) - 1; 1295 1296 span_set->span_row_start = 1297 span_set_prev->span_row_end + 1; 1298 span_set->span_row_end = 1299 span_set->span_row_start + span_row - 1; 1300 1301 span_set->data_strip_start = 1302 span_set_prev->data_strip_end + 1; 1303 span_set->data_strip_end = 1304 span_set->data_strip_start + 1305 (span_row * span_row_width) - 1; 1306 1307 span_set->data_row_start = 1308 span_set_prev->data_row_end + 1; 1309 span_set->data_row_end = 1310 span_set->data_row_start + 1311 (span_row * le32_to_cpu(quad->diff)) - 1; 1312 } 1313 break; 1314 } 1315 if (span == raid->spanDepth) 1316 break; 1317 } 1318 } 1319} 1320 1321void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map, 1322 struct LD_LOAD_BALANCE_INFO *lbInfo) 1323{ 1324 int ldCount; 1325 u16 ld; 1326 struct MR_LD_RAID *raid; 1327 1328 if (lb_pending_cmds > 128 || lb_pending_cmds < 1) 1329 lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; 1330 1331 for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { 1332 ld = MR_TargetIdToLdGet(ldCount, drv_map); 1333 if (ld >= MAX_LOGICAL_DRIVES_EXT - 1) { 1334 lbInfo[ldCount].loadBalanceFlag = 0; 1335 continue; 1336 } 1337 1338 raid = MR_LdRaidGet(ld, drv_map); 1339 if ((raid->level != 1) || 1340 (raid->ldState != MR_LD_STATE_OPTIMAL)) { 1341 lbInfo[ldCount].loadBalanceFlag = 0; 1342 continue; 1343 } 1344 lbInfo[ldCount].loadBalanceFlag = 1; 1345 } 1346} 1347 1348static u8 megasas_get_best_arm_pd(struct megasas_instance *instance, 1349 struct LD_LOAD_BALANCE_INFO *lbInfo, 1350 struct IO_REQUEST_INFO *io_info, 1351 struct MR_DRV_RAID_MAP_ALL *drv_map) 1352{ 1353 struct MR_LD_RAID *raid; 1354 u16 pd1_dev_handle; 1355 u16 pend0, pend1, ld; 1356 u64 diff0, diff1; 1357 u8 bestArm, pd0, pd1, span, arm; 1358 u32 arRef, span_row_size; 1359 1360 u64 block = io_info->ldStartBlock; 1361 u32 count = io_info->numBlocks; 1362 1363 span = ((io_info->span_arm & RAID_CTX_SPANARM_SPAN_MASK) 1364 >> RAID_CTX_SPANARM_SPAN_SHIFT); 1365 arm = (io_info->span_arm & RAID_CTX_SPANARM_ARM_MASK); 1366 1367 ld = MR_TargetIdToLdGet(io_info->ldTgtId, drv_map); 1368 raid = MR_LdRaidGet(ld, drv_map); 1369 span_row_size = instance->UnevenSpanSupport ? 1370 SPAN_ROW_SIZE(drv_map, ld, span) : raid->rowSize; 1371 1372 arRef = MR_LdSpanArrayGet(ld, span, drv_map); 1373 pd0 = MR_ArPdGet(arRef, arm, drv_map); 1374 pd1 = MR_ArPdGet(arRef, (arm + 1) >= span_row_size ? 1375 (arm + 1 - span_row_size) : arm + 1, drv_map); 1376 1377 /* Get PD1 Dev Handle */ 1378 1379 pd1_dev_handle = MR_PdDevHandleGet(pd1, drv_map); 1380 1381 if (pd1_dev_handle == MR_DEVHANDLE_INVALID) { 1382 bestArm = arm; 1383 } else { 1384 /* get the pending cmds for the data and mirror arms */ 1385 pend0 = atomic_read(&lbInfo->scsi_pending_cmds[pd0]); 1386 pend1 = atomic_read(&lbInfo->scsi_pending_cmds[pd1]); 1387 1388 /* Determine the disk whose head is nearer to the req. block */ 1389 diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[pd0]); 1390 diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[pd1]); 1391 bestArm = (diff0 <= diff1 ? arm : arm ^ 1); 1392 1393 /* Make balance count from 16 to 4 to 1394 * keep driver in sync with Firmware 1395 */ 1396 if ((bestArm == arm && pend0 > pend1 + lb_pending_cmds) || 1397 (bestArm != arm && pend1 > pend0 + lb_pending_cmds)) 1398 bestArm ^= 1; 1399 1400 /* Update the last accessed block on the correct pd */ 1401 io_info->span_arm = 1402 (span << RAID_CTX_SPANARM_SPAN_SHIFT) | bestArm; 1403 io_info->pd_after_lb = (bestArm == arm) ? pd0 : pd1; 1404 } 1405 1406 lbInfo->last_accessed_block[io_info->pd_after_lb] = block + count - 1; 1407 return io_info->pd_after_lb; 1408} 1409 1410__le16 get_updated_dev_handle(struct megasas_instance *instance, 1411 struct LD_LOAD_BALANCE_INFO *lbInfo, 1412 struct IO_REQUEST_INFO *io_info, 1413 struct MR_DRV_RAID_MAP_ALL *drv_map) 1414{ 1415 u8 arm_pd; 1416 __le16 devHandle; 1417 1418 /* get best new arm (PD ID) */ 1419 arm_pd = megasas_get_best_arm_pd(instance, lbInfo, io_info, drv_map); 1420 devHandle = MR_PdDevHandleGet(arm_pd, drv_map); 1421 io_info->pd_interface = MR_PdInterfaceTypeGet(arm_pd, drv_map); 1422 atomic_inc(&lbInfo->scsi_pending_cmds[arm_pd]); 1423 1424 return devHandle; 1425} 1426