adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Linux MegaRAID driver for SAS based RAID controllers |
| 3 | * |
adam radford | ae59057 | 2012-10-01 19:27:34 -0700 | [diff] [blame] | 4 | * Copyright (c) 2009-2012 LSI Corporation. |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | * FILE: megaraid_sas_fp.c |
| 21 | * |
| 22 | * Authors: LSI Corporation |
| 23 | * Sumant Patro |
| 24 | * Varad Talamacki |
| 25 | * Manoj Jose |
| 26 | * |
| 27 | * Send feedback to: <megaraidlinux@lsi.com> |
| 28 | * |
| 29 | * Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035 |
| 30 | * ATTN: Linuxraid |
| 31 | */ |
| 32 | |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/pci.h> |
| 36 | #include <linux/list.h> |
| 37 | #include <linux/moduleparam.h> |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/spinlock.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/delay.h> |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 42 | #include <linux/uio.h> |
| 43 | #include <linux/uaccess.h> |
| 44 | #include <linux/fs.h> |
| 45 | #include <linux/compat.h> |
| 46 | #include <linux/blkdev.h> |
| 47 | #include <linux/poll.h> |
| 48 | |
| 49 | #include <scsi/scsi.h> |
| 50 | #include <scsi/scsi_cmnd.h> |
| 51 | #include <scsi/scsi_device.h> |
| 52 | #include <scsi/scsi_host.h> |
| 53 | |
| 54 | #include "megaraid_sas_fusion.h" |
adam radford | 36807e6 | 2011-10-08 18:15:06 -0700 | [diff] [blame] | 55 | #include "megaraid_sas.h" |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 56 | #include <asm/div64.h> |
| 57 | |
| 58 | #define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a))) |
| 59 | #define MR_LD_STATE_OPTIMAL 3 |
| 60 | #define FALSE 0 |
| 61 | #define TRUE 1 |
| 62 | |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 63 | #define SPAN_DEBUG 0 |
| 64 | #define SPAN_ROW_SIZE(map, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowSize) |
| 65 | #define SPAN_ROW_DATA_SIZE(map_, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize) |
| 66 | #define SPAN_INVALID 0xff |
| 67 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 68 | /* Prototypes */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 69 | void mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map, |
| 70 | struct LD_LOAD_BALANCE_INFO *lbInfo); |
| 71 | |
| 72 | static void mr_update_span_set(struct MR_FW_RAID_MAP_ALL *map, |
| 73 | PLD_SPAN_INFO ldSpanInfo); |
| 74 | static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, |
| 75 | u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, |
| 76 | struct RAID_CONTEXT *pRAID_Context, struct MR_FW_RAID_MAP_ALL *map); |
| 77 | static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, |
| 78 | u64 strip, struct MR_FW_RAID_MAP_ALL *map); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 79 | |
| 80 | u32 mega_mod64(u64 dividend, u32 divisor) |
| 81 | { |
| 82 | u64 d; |
| 83 | u32 remainder; |
| 84 | |
| 85 | if (!divisor) |
| 86 | printk(KERN_ERR "megasas : DIVISOR is zero, in div fn\n"); |
| 87 | d = dividend; |
| 88 | remainder = do_div(d, divisor); |
| 89 | return remainder; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * @param dividend : Dividend |
| 94 | * @param divisor : Divisor |
| 95 | * |
| 96 | * @return quotient |
| 97 | **/ |
| 98 | u64 mega_div64_32(uint64_t dividend, uint32_t divisor) |
| 99 | { |
| 100 | u32 remainder; |
| 101 | u64 d; |
| 102 | |
| 103 | if (!divisor) |
| 104 | printk(KERN_ERR "megasas : DIVISOR is zero in mod fn\n"); |
| 105 | |
| 106 | d = dividend; |
| 107 | remainder = do_div(d, divisor); |
| 108 | |
| 109 | return d; |
| 110 | } |
| 111 | |
| 112 | struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map) |
| 113 | { |
| 114 | return &map->raidMap.ldSpanMap[ld].ldRaid; |
| 115 | } |
| 116 | |
| 117 | static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld, |
| 118 | struct MR_FW_RAID_MAP_ALL |
| 119 | *map) |
| 120 | { |
| 121 | return &map->raidMap.ldSpanMap[ld].spanBlock[0]; |
| 122 | } |
| 123 | |
| 124 | static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_FW_RAID_MAP_ALL *map) |
| 125 | { |
| 126 | return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx]; |
| 127 | } |
| 128 | |
adam radford | 21c9e16 | 2013-09-06 15:27:14 -0700 | [diff] [blame] | 129 | u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 130 | { |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 131 | return le16_to_cpu(map->raidMap.arMapInfo[ar].pd[arm]); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 132 | } |
| 133 | |
adam radford | 21c9e16 | 2013-09-06 15:27:14 -0700 | [diff] [blame] | 134 | u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 135 | { |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 136 | return le16_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 137 | } |
| 138 | |
adam radford | 21c9e16 | 2013-09-06 15:27:14 -0700 | [diff] [blame] | 139 | u16 MR_PdDevHandleGet(u32 pd, struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 140 | { |
| 141 | return map->raidMap.devHndlInfo[pd].curDevHdl; |
| 142 | } |
| 143 | |
| 144 | u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map) |
| 145 | { |
Sumit.Saxena@lsi.com | be26374 | 2014-02-12 23:37:46 +0530 | [diff] [blame] | 146 | return le16_to_cpu(map->raidMap.ldSpanMap[ld].ldRaid.targetId); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Sumit.Saxena@lsi.com | be26374 | 2014-02-12 23:37:46 +0530 | [diff] [blame] | 149 | u8 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 150 | { |
Sumit.Saxena@lsi.com | be26374 | 2014-02-12 23:37:46 +0530 | [diff] [blame] | 151 | return map->raidMap.ldTgtIdToLd[ldTgtId]; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span, |
| 155 | struct MR_FW_RAID_MAP_ALL *map) |
| 156 | { |
| 157 | return &map->raidMap.ldSpanMap[ld].spanBlock[span].span; |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * This function will validate Map info data provided by FW |
| 162 | */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 163 | u8 MR_ValidateMapInfo(struct megasas_instance *instance) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 164 | { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 165 | struct fusion_context *fusion = instance->ctrl_context; |
| 166 | struct MR_FW_RAID_MAP_ALL *map = fusion->ld_map[(instance->map_id & 1)]; |
| 167 | struct LD_LOAD_BALANCE_INFO *lbInfo = fusion->load_balance_info; |
| 168 | PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 169 | struct MR_FW_RAID_MAP *pFwRaidMap = &map->raidMap; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 170 | struct MR_LD_RAID *raid; |
| 171 | int ldCount, num_lds; |
| 172 | u16 ld; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 173 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 174 | |
| 175 | if (le32_to_cpu(pFwRaidMap->totalSize) != |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 176 | (sizeof(struct MR_FW_RAID_MAP) -sizeof(struct MR_LD_SPAN_MAP) + |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 177 | (sizeof(struct MR_LD_SPAN_MAP) * le32_to_cpu(pFwRaidMap->ldCount)))) { |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 178 | printk(KERN_ERR "megasas: map info structure size 0x%x is not matching with ld count\n", |
| 179 | (unsigned int)((sizeof(struct MR_FW_RAID_MAP) - |
| 180 | sizeof(struct MR_LD_SPAN_MAP)) + |
| 181 | (sizeof(struct MR_LD_SPAN_MAP) * |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 182 | le32_to_cpu(pFwRaidMap->ldCount)))); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 183 | printk(KERN_ERR "megasas: span map %x, pFwRaidMap->totalSize " |
| 184 | ": %x\n", (unsigned int)sizeof(struct MR_LD_SPAN_MAP), |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 185 | le32_to_cpu(pFwRaidMap->totalSize)); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 186 | return 0; |
| 187 | } |
| 188 | |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 189 | if (instance->UnevenSpanSupport) |
| 190 | mr_update_span_set(map, ldSpanInfo); |
| 191 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 192 | mr_update_load_balance_params(map, lbInfo); |
| 193 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 194 | num_lds = le32_to_cpu(map->raidMap.ldCount); |
| 195 | |
| 196 | /*Convert Raid capability values to CPU arch */ |
| 197 | for (ldCount = 0; ldCount < num_lds; ldCount++) { |
| 198 | ld = MR_TargetIdToLdGet(ldCount, map); |
| 199 | raid = MR_LdRaidGet(ld, map); |
| 200 | le32_to_cpus((u32 *)&raid->capability); |
| 201 | } |
| 202 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 203 | return 1; |
| 204 | } |
| 205 | |
| 206 | u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk, |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 207 | struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 208 | { |
| 209 | struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map); |
| 210 | struct MR_QUAD_ELEMENT *quad; |
| 211 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 212 | u32 span, j; |
| 213 | |
| 214 | for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) { |
| 215 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 216 | for (j = 0; j < le32_to_cpu(pSpanBlock->block_span_info.noElements); j++) { |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 217 | quad = &pSpanBlock->block_span_info.quad[j]; |
| 218 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 219 | if (le32_to_cpu(quad->diff) == 0) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 220 | return SPAN_INVALID; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 221 | if (le64_to_cpu(quad->logStart) <= row && row <= |
| 222 | le64_to_cpu(quad->logEnd) && (mega_mod64(row - le64_to_cpu(quad->logStart), |
| 223 | le32_to_cpu(quad->diff))) == 0) { |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 224 | if (span_blk != NULL) { |
| 225 | u64 blk, debugBlk; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 226 | blk = mega_div64_32((row-le64_to_cpu(quad->logStart)), le32_to_cpu(quad->diff)); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 227 | debugBlk = blk; |
| 228 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 229 | blk = (blk + le64_to_cpu(quad->offsetInSpan)) << raid->stripeShift; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 230 | *span_blk = blk; |
| 231 | } |
| 232 | return span; |
| 233 | } |
| 234 | } |
| 235 | } |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 236 | return SPAN_INVALID; |
| 237 | } |
| 238 | |
| 239 | /* |
| 240 | ****************************************************************************** |
| 241 | * |
| 242 | * Function to print info about span set created in driver from FW raid map |
| 243 | * |
| 244 | * Inputs : |
| 245 | * map - LD map |
| 246 | * ldSpanInfo - ldSpanInfo per HBA instance |
| 247 | */ |
| 248 | #if SPAN_DEBUG |
| 249 | static int getSpanInfo(struct MR_FW_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo) |
| 250 | { |
| 251 | |
| 252 | u8 span; |
| 253 | u32 element; |
| 254 | struct MR_LD_RAID *raid; |
| 255 | LD_SPAN_SET *span_set; |
| 256 | struct MR_QUAD_ELEMENT *quad; |
| 257 | int ldCount; |
| 258 | u16 ld; |
| 259 | |
| 260 | for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) { |
| 261 | ld = MR_TargetIdToLdGet(ldCount, map); |
| 262 | if (ld >= MAX_LOGICAL_DRIVES) |
| 263 | continue; |
| 264 | raid = MR_LdRaidGet(ld, map); |
| 265 | dev_dbg(&instance->pdev->dev, "LD %x: span_depth=%x\n", |
| 266 | ld, raid->spanDepth); |
| 267 | for (span = 0; span < raid->spanDepth; span++) |
| 268 | dev_dbg(&instance->pdev->dev, "Span=%x," |
| 269 | " number of quads=%x\n", span, |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 270 | le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 271 | block_span_info.noElements)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 272 | for (element = 0; element < MAX_QUAD_DEPTH; element++) { |
| 273 | span_set = &(ldSpanInfo[ld].span_set[element]); |
| 274 | if (span_set->span_row_data_width == 0) |
| 275 | break; |
| 276 | |
| 277 | dev_dbg(&instance->pdev->dev, "Span Set %x:" |
| 278 | "width=%x, diff=%x\n", element, |
| 279 | (unsigned int)span_set->span_row_data_width, |
| 280 | (unsigned int)span_set->diff); |
| 281 | dev_dbg(&instance->pdev->dev, "logical LBA" |
| 282 | "start=0x%08lx, end=0x%08lx\n", |
| 283 | (long unsigned int)span_set->log_start_lba, |
| 284 | (long unsigned int)span_set->log_end_lba); |
| 285 | dev_dbg(&instance->pdev->dev, "span row start=0x%08lx," |
| 286 | " end=0x%08lx\n", |
| 287 | (long unsigned int)span_set->span_row_start, |
| 288 | (long unsigned int)span_set->span_row_end); |
| 289 | dev_dbg(&instance->pdev->dev, "data row start=0x%08lx," |
| 290 | " end=0x%08lx\n", |
| 291 | (long unsigned int)span_set->data_row_start, |
| 292 | (long unsigned int)span_set->data_row_end); |
| 293 | dev_dbg(&instance->pdev->dev, "data strip start=0x%08lx," |
| 294 | " end=0x%08lx\n", |
| 295 | (long unsigned int)span_set->data_strip_start, |
| 296 | (long unsigned int)span_set->data_strip_end); |
| 297 | |
| 298 | for (span = 0; span < raid->spanDepth; span++) { |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 299 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 300 | block_span_info.noElements) >= |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 301 | element + 1) { |
| 302 | quad = &map->raidMap.ldSpanMap[ld]. |
| 303 | spanBlock[span].block_span_info. |
| 304 | quad[element]; |
| 305 | dev_dbg(&instance->pdev->dev, "Span=%x," |
| 306 | "Quad=%x, diff=%x\n", span, |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 307 | element, le32_to_cpu(quad->diff)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 308 | dev_dbg(&instance->pdev->dev, |
| 309 | "offset_in_span=0x%08lx\n", |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 310 | (long unsigned int)le64_to_cpu(quad->offsetInSpan)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 311 | dev_dbg(&instance->pdev->dev, |
| 312 | "logical start=0x%08lx, end=0x%08lx\n", |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 313 | (long unsigned int)le64_to_cpu(quad->logStart), |
| 314 | (long unsigned int)le64_to_cpu(quad->logEnd)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | return 0; |
| 320 | } |
| 321 | #endif |
| 322 | |
| 323 | /* |
| 324 | ****************************************************************************** |
| 325 | * |
| 326 | * This routine calculates the Span block for given row using spanset. |
| 327 | * |
| 328 | * Inputs : |
| 329 | * instance - HBA instance |
| 330 | * ld - Logical drive number |
| 331 | * row - Row number |
| 332 | * map - LD map |
| 333 | * |
| 334 | * Outputs : |
| 335 | * |
| 336 | * span - Span number |
| 337 | * block - Absolute Block number in the physical disk |
| 338 | * div_error - Devide error code. |
| 339 | */ |
| 340 | |
| 341 | u32 mr_spanset_get_span_block(struct megasas_instance *instance, |
| 342 | u32 ld, u64 row, u64 *span_blk, struct MR_FW_RAID_MAP_ALL *map) |
| 343 | { |
| 344 | struct fusion_context *fusion = instance->ctrl_context; |
| 345 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 346 | LD_SPAN_SET *span_set; |
| 347 | struct MR_QUAD_ELEMENT *quad; |
| 348 | u32 span, info; |
| 349 | PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
| 350 | |
| 351 | for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
| 352 | span_set = &(ldSpanInfo[ld].span_set[info]); |
| 353 | |
| 354 | if (span_set->span_row_data_width == 0) |
| 355 | break; |
| 356 | |
| 357 | if (row > span_set->data_row_end) |
| 358 | continue; |
| 359 | |
| 360 | for (span = 0; span < raid->spanDepth; span++) |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 361 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 362 | block_span_info.noElements) >= info+1) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 363 | quad = &map->raidMap.ldSpanMap[ld]. |
| 364 | spanBlock[span]. |
| 365 | block_span_info.quad[info]; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 366 | if (le32_to_cpu(quad->diff == 0)) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 367 | return SPAN_INVALID; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 368 | if (le64_to_cpu(quad->logStart) <= row && |
| 369 | row <= le64_to_cpu(quad->logEnd) && |
| 370 | (mega_mod64(row - le64_to_cpu(quad->logStart), |
| 371 | le32_to_cpu(quad->diff))) == 0) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 372 | if (span_blk != NULL) { |
| 373 | u64 blk; |
| 374 | blk = mega_div64_32 |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 375 | ((row - le64_to_cpu(quad->logStart)), |
| 376 | le32_to_cpu(quad->diff)); |
| 377 | blk = (blk + le64_to_cpu(quad->offsetInSpan)) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 378 | << raid->stripeShift; |
| 379 | *span_blk = blk; |
| 380 | } |
| 381 | return span; |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | return SPAN_INVALID; |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | ****************************************************************************** |
| 390 | * |
| 391 | * This routine calculates the row for given strip using spanset. |
| 392 | * |
| 393 | * Inputs : |
| 394 | * instance - HBA instance |
| 395 | * ld - Logical drive number |
| 396 | * Strip - Strip |
| 397 | * map - LD map |
| 398 | * |
| 399 | * Outputs : |
| 400 | * |
| 401 | * row - row associated with strip |
| 402 | */ |
| 403 | |
| 404 | static u64 get_row_from_strip(struct megasas_instance *instance, |
| 405 | u32 ld, u64 strip, struct MR_FW_RAID_MAP_ALL *map) |
| 406 | { |
| 407 | struct fusion_context *fusion = instance->ctrl_context; |
| 408 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 409 | LD_SPAN_SET *span_set; |
| 410 | PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
| 411 | u32 info, strip_offset, span, span_offset; |
| 412 | u64 span_set_Strip, span_set_Row, retval; |
| 413 | |
| 414 | for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
| 415 | span_set = &(ldSpanInfo[ld].span_set[info]); |
| 416 | |
| 417 | if (span_set->span_row_data_width == 0) |
| 418 | break; |
| 419 | if (strip > span_set->data_strip_end) |
| 420 | continue; |
| 421 | |
| 422 | span_set_Strip = strip - span_set->data_strip_start; |
| 423 | strip_offset = mega_mod64(span_set_Strip, |
| 424 | span_set->span_row_data_width); |
| 425 | span_set_Row = mega_div64_32(span_set_Strip, |
| 426 | span_set->span_row_data_width) * span_set->diff; |
| 427 | for (span = 0, span_offset = 0; span < raid->spanDepth; span++) |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 428 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 429 | block_span_info.noElements >= info+1)) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 430 | if (strip_offset >= |
| 431 | span_set->strip_offset[span]) |
| 432 | span_offset++; |
| 433 | else |
| 434 | break; |
| 435 | } |
| 436 | #if SPAN_DEBUG |
| 437 | dev_info(&instance->pdev->dev, "Strip 0x%llx," |
| 438 | "span_set_Strip 0x%llx, span_set_Row 0x%llx" |
| 439 | "data width 0x%llx span offset 0x%x\n", strip, |
| 440 | (unsigned long long)span_set_Strip, |
| 441 | (unsigned long long)span_set_Row, |
| 442 | (unsigned long long)span_set->span_row_data_width, |
| 443 | span_offset); |
| 444 | dev_info(&instance->pdev->dev, "For strip 0x%llx" |
| 445 | "row is 0x%llx\n", strip, |
| 446 | (unsigned long long) span_set->data_row_start + |
| 447 | (unsigned long long) span_set_Row + (span_offset - 1)); |
| 448 | #endif |
| 449 | retval = (span_set->data_row_start + span_set_Row + |
| 450 | (span_offset - 1)); |
| 451 | return retval; |
| 452 | } |
| 453 | return -1LLU; |
| 454 | } |
| 455 | |
| 456 | |
| 457 | /* |
| 458 | ****************************************************************************** |
| 459 | * |
| 460 | * This routine calculates the Start Strip for given row using spanset. |
| 461 | * |
| 462 | * Inputs : |
| 463 | * instance - HBA instance |
| 464 | * ld - Logical drive number |
| 465 | * row - Row number |
| 466 | * map - LD map |
| 467 | * |
| 468 | * Outputs : |
| 469 | * |
| 470 | * Strip - Start strip associated with row |
| 471 | */ |
| 472 | |
| 473 | static u64 get_strip_from_row(struct megasas_instance *instance, |
| 474 | u32 ld, u64 row, struct MR_FW_RAID_MAP_ALL *map) |
| 475 | { |
| 476 | struct fusion_context *fusion = instance->ctrl_context; |
| 477 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 478 | LD_SPAN_SET *span_set; |
| 479 | struct MR_QUAD_ELEMENT *quad; |
| 480 | PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
| 481 | u32 span, info; |
| 482 | u64 strip; |
| 483 | |
| 484 | for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
| 485 | span_set = &(ldSpanInfo[ld].span_set[info]); |
| 486 | |
| 487 | if (span_set->span_row_data_width == 0) |
| 488 | break; |
| 489 | if (row > span_set->data_row_end) |
| 490 | continue; |
| 491 | |
| 492 | for (span = 0; span < raid->spanDepth; span++) |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 493 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 494 | block_span_info.noElements) >= info+1) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 495 | quad = &map->raidMap.ldSpanMap[ld]. |
| 496 | spanBlock[span].block_span_info.quad[info]; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 497 | if (le64_to_cpu(quad->logStart) <= row && |
| 498 | row <= le64_to_cpu(quad->logEnd) && |
| 499 | mega_mod64((row - le64_to_cpu(quad->logStart)), |
| 500 | le32_to_cpu(quad->diff)) == 0) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 501 | strip = mega_div64_32 |
| 502 | (((row - span_set->data_row_start) |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 503 | - le64_to_cpu(quad->logStart)), |
| 504 | le32_to_cpu(quad->diff)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 505 | strip *= span_set->span_row_data_width; |
| 506 | strip += span_set->data_strip_start; |
| 507 | strip += span_set->strip_offset[span]; |
| 508 | return strip; |
| 509 | } |
| 510 | } |
| 511 | } |
| 512 | dev_err(&instance->pdev->dev, "get_strip_from_row" |
| 513 | "returns invalid strip for ld=%x, row=%lx\n", |
| 514 | ld, (long unsigned int)row); |
| 515 | return -1; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | ****************************************************************************** |
| 520 | * |
| 521 | * This routine calculates the Physical Arm for given strip using spanset. |
| 522 | * |
| 523 | * Inputs : |
| 524 | * instance - HBA instance |
| 525 | * ld - Logical drive number |
| 526 | * strip - Strip |
| 527 | * map - LD map |
| 528 | * |
| 529 | * Outputs : |
| 530 | * |
| 531 | * Phys Arm - Phys Arm associated with strip |
| 532 | */ |
| 533 | |
| 534 | static u32 get_arm_from_strip(struct megasas_instance *instance, |
| 535 | u32 ld, u64 strip, struct MR_FW_RAID_MAP_ALL *map) |
| 536 | { |
| 537 | struct fusion_context *fusion = instance->ctrl_context; |
| 538 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 539 | LD_SPAN_SET *span_set; |
| 540 | PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
| 541 | u32 info, strip_offset, span, span_offset, retval; |
| 542 | |
| 543 | for (info = 0 ; info < MAX_QUAD_DEPTH; info++) { |
| 544 | span_set = &(ldSpanInfo[ld].span_set[info]); |
| 545 | |
| 546 | if (span_set->span_row_data_width == 0) |
| 547 | break; |
| 548 | if (strip > span_set->data_strip_end) |
| 549 | continue; |
| 550 | |
| 551 | strip_offset = (uint)mega_mod64 |
| 552 | ((strip - span_set->data_strip_start), |
| 553 | span_set->span_row_data_width); |
| 554 | |
| 555 | for (span = 0, span_offset = 0; span < raid->spanDepth; span++) |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 556 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 557 | block_span_info.noElements) >= info+1) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 558 | if (strip_offset >= |
| 559 | span_set->strip_offset[span]) |
| 560 | span_offset = |
| 561 | span_set->strip_offset[span]; |
| 562 | else |
| 563 | break; |
| 564 | } |
| 565 | #if SPAN_DEBUG |
| 566 | dev_info(&instance->pdev->dev, "get_arm_from_strip:" |
| 567 | "for ld=0x%x strip=0x%lx arm is 0x%x\n", ld, |
| 568 | (long unsigned int)strip, (strip_offset - span_offset)); |
| 569 | #endif |
| 570 | retval = (strip_offset - span_offset); |
| 571 | return retval; |
| 572 | } |
| 573 | |
| 574 | dev_err(&instance->pdev->dev, "get_arm_from_strip" |
| 575 | "returns invalid arm for ld=%x strip=%lx\n", |
| 576 | ld, (long unsigned int)strip); |
| 577 | |
| 578 | return -1; |
| 579 | } |
| 580 | |
| 581 | /* This Function will return Phys arm */ |
| 582 | u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe, |
| 583 | struct MR_FW_RAID_MAP_ALL *map) |
| 584 | { |
| 585 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 586 | /* Need to check correct default value */ |
| 587 | u32 arm = 0; |
| 588 | |
| 589 | switch (raid->level) { |
| 590 | case 0: |
| 591 | case 5: |
| 592 | case 6: |
| 593 | arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span)); |
| 594 | break; |
| 595 | case 1: |
| 596 | /* start with logical arm */ |
| 597 | arm = get_arm_from_strip(instance, ld, stripe, map); |
Dan Carpenter | fec3c1b | 2013-06-29 00:21:04 +0300 | [diff] [blame] | 598 | if (arm != -1U) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 599 | arm *= 2; |
| 600 | break; |
| 601 | } |
| 602 | |
| 603 | return arm; |
| 604 | } |
| 605 | |
| 606 | |
| 607 | /* |
| 608 | ****************************************************************************** |
| 609 | * |
| 610 | * This routine calculates the arm, span and block for the specified stripe and |
| 611 | * reference in stripe using spanset |
| 612 | * |
| 613 | * Inputs : |
| 614 | * |
| 615 | * ld - Logical drive number |
| 616 | * stripRow - Stripe number |
| 617 | * stripRef - Reference in stripe |
| 618 | * |
| 619 | * Outputs : |
| 620 | * |
| 621 | * span - Span number |
| 622 | * block - Absolute Block number in the physical disk |
| 623 | */ |
| 624 | static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, |
| 625 | u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, |
| 626 | struct RAID_CONTEXT *pRAID_Context, |
| 627 | struct MR_FW_RAID_MAP_ALL *map) |
| 628 | { |
| 629 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 630 | u32 pd, arRef; |
| 631 | u8 physArm, span; |
| 632 | u64 row; |
| 633 | u8 retval = TRUE; |
| 634 | u8 do_invader = 0; |
| 635 | u64 *pdBlock = &io_info->pdBlock; |
| 636 | u16 *pDevHandle = &io_info->devHandle; |
| 637 | u32 logArm, rowMod, armQ, arm; |
| 638 | |
| 639 | if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER || |
| 640 | instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) |
| 641 | do_invader = 1; |
| 642 | |
| 643 | /*Get row and span from io_info for Uneven Span IO.*/ |
| 644 | row = io_info->start_row; |
| 645 | span = io_info->start_span; |
| 646 | |
| 647 | |
| 648 | if (raid->level == 6) { |
| 649 | logArm = get_arm_from_strip(instance, ld, stripRow, map); |
Dan Carpenter | fec3c1b | 2013-06-29 00:21:04 +0300 | [diff] [blame] | 650 | if (logArm == -1U) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 651 | return FALSE; |
| 652 | rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span)); |
| 653 | armQ = SPAN_ROW_SIZE(map, ld, span) - 1 - rowMod; |
| 654 | arm = armQ + 1 + logArm; |
| 655 | if (arm >= SPAN_ROW_SIZE(map, ld, span)) |
| 656 | arm -= SPAN_ROW_SIZE(map, ld, span); |
| 657 | physArm = (u8)arm; |
| 658 | } else |
| 659 | /* Calculate the arm */ |
| 660 | physArm = get_arm(instance, ld, span, stripRow, map); |
| 661 | if (physArm == 0xFF) |
| 662 | return FALSE; |
| 663 | |
| 664 | arRef = MR_LdSpanArrayGet(ld, span, map); |
| 665 | pd = MR_ArPdGet(arRef, physArm, map); |
| 666 | |
| 667 | if (pd != MR_PD_INVALID) |
| 668 | *pDevHandle = MR_PdDevHandleGet(pd, map); |
| 669 | else { |
| 670 | *pDevHandle = MR_PD_INVALID; |
| 671 | if ((raid->level >= 5) && |
| 672 | (!do_invader || (do_invader && |
| 673 | (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) |
| 674 | pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE; |
| 675 | else if (raid->level == 1) { |
| 676 | pd = MR_ArPdGet(arRef, physArm + 1, map); |
| 677 | if (pd != MR_PD_INVALID) |
| 678 | *pDevHandle = MR_PdDevHandleGet(pd, map); |
| 679 | } |
| 680 | } |
| 681 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 682 | *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 683 | pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | |
| 684 | physArm; |
| 685 | return retval; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | /* |
| 689 | ****************************************************************************** |
| 690 | * |
| 691 | * This routine calculates the arm, span and block for the specified stripe and |
| 692 | * reference in stripe. |
| 693 | * |
| 694 | * Inputs : |
| 695 | * |
| 696 | * ld - Logical drive number |
| 697 | * stripRow - Stripe number |
| 698 | * stripRef - Reference in stripe |
| 699 | * |
| 700 | * Outputs : |
| 701 | * |
| 702 | * span - Span number |
| 703 | * block - Absolute Block number in the physical disk |
| 704 | */ |
adam radford | 36807e6 | 2011-10-08 18:15:06 -0700 | [diff] [blame] | 705 | u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow, |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 706 | u16 stripRef, struct IO_REQUEST_INFO *io_info, |
| 707 | struct RAID_CONTEXT *pRAID_Context, |
| 708 | struct MR_FW_RAID_MAP_ALL *map) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 709 | { |
| 710 | struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
| 711 | u32 pd, arRef; |
| 712 | u8 physArm, span; |
| 713 | u64 row; |
| 714 | u8 retval = TRUE; |
Sumit.Saxena@lsi.com | 21d3c71 | 2013-05-22 12:31:43 +0530 | [diff] [blame] | 715 | u8 do_invader = 0; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 716 | u64 *pdBlock = &io_info->pdBlock; |
| 717 | u16 *pDevHandle = &io_info->devHandle; |
Sumit.Saxena@lsi.com | 21d3c71 | 2013-05-22 12:31:43 +0530 | [diff] [blame] | 718 | |
| 719 | if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER || |
| 720 | instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) |
| 721 | do_invader = 1; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 722 | |
| 723 | row = mega_div64_32(stripRow, raid->rowDataSize); |
| 724 | |
| 725 | if (raid->level == 6) { |
| 726 | /* logical arm within row */ |
| 727 | u32 logArm = mega_mod64(stripRow, raid->rowDataSize); |
| 728 | u32 rowMod, armQ, arm; |
| 729 | |
| 730 | if (raid->rowSize == 0) |
| 731 | return FALSE; |
| 732 | /* get logical row mod */ |
| 733 | rowMod = mega_mod64(row, raid->rowSize); |
| 734 | armQ = raid->rowSize-1-rowMod; /* index of Q drive */ |
| 735 | arm = armQ+1+logArm; /* data always logically follows Q */ |
| 736 | if (arm >= raid->rowSize) /* handle wrap condition */ |
| 737 | arm -= raid->rowSize; |
| 738 | physArm = (u8)arm; |
| 739 | } else { |
| 740 | if (raid->modFactor == 0) |
| 741 | return FALSE; |
| 742 | physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow, |
| 743 | raid->modFactor), |
| 744 | map); |
| 745 | } |
| 746 | |
| 747 | if (raid->spanDepth == 1) { |
| 748 | span = 0; |
| 749 | *pdBlock = row << raid->stripeShift; |
| 750 | } else { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 751 | span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map); |
| 752 | if (span == SPAN_INVALID) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 753 | return FALSE; |
| 754 | } |
| 755 | |
| 756 | /* Get the array on which this span is present */ |
| 757 | arRef = MR_LdSpanArrayGet(ld, span, map); |
| 758 | pd = MR_ArPdGet(arRef, physArm, map); /* Get the pd */ |
| 759 | |
| 760 | if (pd != MR_PD_INVALID) |
| 761 | /* Get dev handle from Pd. */ |
| 762 | *pDevHandle = MR_PdDevHandleGet(pd, map); |
| 763 | else { |
| 764 | *pDevHandle = MR_PD_INVALID; /* set dev handle as invalid. */ |
adam radford | 36807e6 | 2011-10-08 18:15:06 -0700 | [diff] [blame] | 765 | if ((raid->level >= 5) && |
Sumit.Saxena@lsi.com | 21d3c71 | 2013-05-22 12:31:43 +0530 | [diff] [blame] | 766 | (!do_invader || (do_invader && |
| 767 | (raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 768 | pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE; |
| 769 | else if (raid->level == 1) { |
| 770 | /* Get alternate Pd. */ |
| 771 | pd = MR_ArPdGet(arRef, physArm + 1, map); |
| 772 | if (pd != MR_PD_INVALID) |
| 773 | /* Get dev handle from Pd */ |
| 774 | *pDevHandle = MR_PdDevHandleGet(pd, map); |
| 775 | } |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 776 | } |
| 777 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 778 | *pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 779 | pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | |
| 780 | physArm; |
| 781 | return retval; |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | ****************************************************************************** |
| 786 | * |
| 787 | * MR_BuildRaidContext function |
| 788 | * |
| 789 | * This function will initiate command processing. The start/end row and strip |
| 790 | * information is calculated then the lock is acquired. |
| 791 | * This function will return 0 if region lock was acquired OR return num strips |
| 792 | */ |
| 793 | u8 |
adam radford | 36807e6 | 2011-10-08 18:15:06 -0700 | [diff] [blame] | 794 | MR_BuildRaidContext(struct megasas_instance *instance, |
| 795 | struct IO_REQUEST_INFO *io_info, |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 796 | struct RAID_CONTEXT *pRAID_Context, |
adam radford | 21c9e16 | 2013-09-06 15:27:14 -0700 | [diff] [blame] | 797 | struct MR_FW_RAID_MAP_ALL *map, u8 **raidLUN) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 798 | { |
| 799 | struct MR_LD_RAID *raid; |
| 800 | u32 ld, stripSize, stripe_mask; |
| 801 | u64 endLba, endStrip, endRow, start_row, start_strip; |
| 802 | u64 regStart; |
| 803 | u32 regSize; |
| 804 | u8 num_strips, numRows; |
| 805 | u16 ref_in_start_stripe, ref_in_end_stripe; |
| 806 | u64 ldStartBlock; |
| 807 | u32 numBlocks, ldTgtId; |
| 808 | u8 isRead; |
| 809 | u8 retval = 0; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 810 | u8 startlba_span = SPAN_INVALID; |
| 811 | u64 *pdBlock = &io_info->pdBlock; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 812 | |
| 813 | ldStartBlock = io_info->ldStartBlock; |
| 814 | numBlocks = io_info->numBlocks; |
| 815 | ldTgtId = io_info->ldTgtId; |
| 816 | isRead = io_info->isRead; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 817 | io_info->IoforUnevenSpan = 0; |
| 818 | io_info->start_span = SPAN_INVALID; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 819 | |
| 820 | ld = MR_TargetIdToLdGet(ldTgtId, map); |
| 821 | raid = MR_LdRaidGet(ld, map); |
| 822 | |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 823 | /* |
| 824 | * if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero |
| 825 | * return FALSE |
| 826 | */ |
| 827 | if (raid->rowDataSize == 0) { |
| 828 | if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0) |
| 829 | return FALSE; |
| 830 | else if (instance->UnevenSpanSupport) { |
| 831 | io_info->IoforUnevenSpan = 1; |
| 832 | } else { |
| 833 | dev_info(&instance->pdev->dev, |
| 834 | "raid->rowDataSize is 0, but has SPAN[0]" |
| 835 | "rowDataSize = 0x%0x," |
| 836 | "but there is _NO_ UnevenSpanSupport\n", |
| 837 | MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize); |
| 838 | return FALSE; |
| 839 | } |
| 840 | } |
| 841 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 842 | stripSize = 1 << raid->stripeShift; |
| 843 | stripe_mask = stripSize-1; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 844 | |
| 845 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 846 | /* |
| 847 | * calculate starting row and stripe, and number of strips and rows |
| 848 | */ |
| 849 | start_strip = ldStartBlock >> raid->stripeShift; |
| 850 | ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask); |
| 851 | endLba = ldStartBlock + numBlocks - 1; |
| 852 | ref_in_end_stripe = (u16)(endLba & stripe_mask); |
| 853 | endStrip = endLba >> raid->stripeShift; |
| 854 | num_strips = (u8)(endStrip - start_strip + 1); /* End strip */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 855 | |
| 856 | if (io_info->IoforUnevenSpan) { |
| 857 | start_row = get_row_from_strip(instance, ld, start_strip, map); |
| 858 | endRow = get_row_from_strip(instance, ld, endStrip, map); |
| 859 | if (start_row == -1ULL || endRow == -1ULL) { |
| 860 | dev_info(&instance->pdev->dev, "return from %s %d." |
| 861 | "Send IO w/o region lock.\n", |
| 862 | __func__, __LINE__); |
| 863 | return FALSE; |
| 864 | } |
| 865 | |
| 866 | if (raid->spanDepth == 1) { |
| 867 | startlba_span = 0; |
| 868 | *pdBlock = start_row << raid->stripeShift; |
| 869 | } else |
| 870 | startlba_span = (u8)mr_spanset_get_span_block(instance, |
| 871 | ld, start_row, pdBlock, map); |
| 872 | if (startlba_span == SPAN_INVALID) { |
| 873 | dev_info(&instance->pdev->dev, "return from %s %d" |
| 874 | "for row 0x%llx,start strip %llx" |
| 875 | "endSrip %llx\n", __func__, __LINE__, |
| 876 | (unsigned long long)start_row, |
| 877 | (unsigned long long)start_strip, |
| 878 | (unsigned long long)endStrip); |
| 879 | return FALSE; |
| 880 | } |
| 881 | io_info->start_span = startlba_span; |
| 882 | io_info->start_row = start_row; |
| 883 | #if SPAN_DEBUG |
| 884 | dev_dbg(&instance->pdev->dev, "Check Span number from %s %d" |
| 885 | "for row 0x%llx, start strip 0x%llx end strip 0x%llx" |
| 886 | " span 0x%x\n", __func__, __LINE__, |
| 887 | (unsigned long long)start_row, |
| 888 | (unsigned long long)start_strip, |
| 889 | (unsigned long long)endStrip, startlba_span); |
| 890 | dev_dbg(&instance->pdev->dev, "start_row 0x%llx endRow 0x%llx" |
| 891 | "Start span 0x%x\n", (unsigned long long)start_row, |
| 892 | (unsigned long long)endRow, startlba_span); |
| 893 | #endif |
| 894 | } else { |
| 895 | start_row = mega_div64_32(start_strip, raid->rowDataSize); |
| 896 | endRow = mega_div64_32(endStrip, raid->rowDataSize); |
| 897 | } |
| 898 | numRows = (u8)(endRow - start_row + 1); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 899 | |
| 900 | /* |
| 901 | * calculate region info. |
| 902 | */ |
| 903 | |
| 904 | /* assume region is at the start of the first row */ |
| 905 | regStart = start_row << raid->stripeShift; |
| 906 | /* assume this IO needs the full row - we'll adjust if not true */ |
| 907 | regSize = stripSize; |
| 908 | |
adam radford | c1529fa | 2012-03-19 19:50:00 -0700 | [diff] [blame] | 909 | /* Check if we can send this I/O via FastPath */ |
| 910 | if (raid->capability.fpCapable) { |
| 911 | if (isRead) |
| 912 | io_info->fpOkForIo = (raid->capability.fpReadCapable && |
| 913 | ((num_strips == 1) || |
| 914 | raid->capability. |
| 915 | fpReadAcrossStripe)); |
| 916 | else |
| 917 | io_info->fpOkForIo = (raid->capability.fpWriteCapable && |
| 918 | ((num_strips == 1) || |
| 919 | raid->capability. |
| 920 | fpWriteAcrossStripe)); |
| 921 | } else |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 922 | io_info->fpOkForIo = FALSE; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 923 | |
| 924 | if (numRows == 1) { |
| 925 | /* single-strip IOs can always lock only the data needed */ |
| 926 | if (num_strips == 1) { |
| 927 | regStart += ref_in_start_stripe; |
| 928 | regSize = numBlocks; |
| 929 | } |
| 930 | /* multi-strip IOs always need to full stripe locked */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 931 | } else if (io_info->IoforUnevenSpan == 0) { |
| 932 | /* |
| 933 | * For Even span region lock optimization. |
| 934 | * If the start strip is the last in the start row |
| 935 | */ |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 936 | if (start_strip == (start_row + 1) * raid->rowDataSize - 1) { |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 937 | regStart += ref_in_start_stripe; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 938 | /* initialize count to sectors from startref to end |
| 939 | of strip */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 940 | regSize = stripSize - ref_in_start_stripe; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 941 | } |
| 942 | |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 943 | /* add complete rows in the middle of the transfer */ |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 944 | if (numRows > 2) |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 945 | regSize += (numRows-2) << raid->stripeShift; |
| 946 | |
| 947 | /* if IO ends within first strip of last row*/ |
| 948 | if (endStrip == endRow*raid->rowDataSize) |
| 949 | regSize += ref_in_end_stripe+1; |
| 950 | else |
| 951 | regSize += stripSize; |
| 952 | } else { |
| 953 | /* |
| 954 | * For Uneven span region lock optimization. |
| 955 | * If the start strip is the last in the start row |
| 956 | */ |
| 957 | if (start_strip == (get_strip_from_row(instance, ld, start_row, map) + |
| 958 | SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) { |
| 959 | regStart += ref_in_start_stripe; |
| 960 | /* initialize count to sectors from |
| 961 | * startRef to end of strip |
| 962 | */ |
| 963 | regSize = stripSize - ref_in_start_stripe; |
| 964 | } |
| 965 | /* Add complete rows in the middle of the transfer*/ |
| 966 | |
| 967 | if (numRows > 2) |
| 968 | /* Add complete rows in the middle of the transfer*/ |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 969 | regSize += (numRows-2) << raid->stripeShift; |
| 970 | |
| 971 | /* if IO ends within first strip of last row */ |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 972 | if (endStrip == get_strip_from_row(instance, ld, endRow, map)) |
| 973 | regSize += ref_in_end_stripe + 1; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 974 | else |
| 975 | regSize += stripSize; |
| 976 | } |
| 977 | |
adam radford | 26a077e | 2014-03-10 02:51:28 -0700 | [diff] [blame] | 978 | pRAID_Context->timeoutValue = |
| 979 | cpu_to_le16(raid->fpIoTimeoutForLd ? |
| 980 | raid->fpIoTimeoutForLd : |
| 981 | map->raidMap.fpPdIoTimeoutSec); |
Sumit.Saxena@lsi.com | 21d3c71 | 2013-05-22 12:31:43 +0530 | [diff] [blame] | 982 | if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) || |
| 983 | (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) |
adam radford | 36807e6 | 2011-10-08 18:15:06 -0700 | [diff] [blame] | 984 | pRAID_Context->regLockFlags = (isRead) ? |
| 985 | raid->regTypeReqOnRead : raid->regTypeReqOnWrite; |
| 986 | else |
| 987 | pRAID_Context->regLockFlags = (isRead) ? |
| 988 | REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite; |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 989 | pRAID_Context->VirtualDiskTgtId = raid->targetId; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 990 | pRAID_Context->regLockRowLBA = cpu_to_le64(regStart); |
| 991 | pRAID_Context->regLockLength = cpu_to_le32(regSize); |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 992 | pRAID_Context->configSeqNum = raid->seqNum; |
adam radford | 21c9e16 | 2013-09-06 15:27:14 -0700 | [diff] [blame] | 993 | /* save pointer to raid->LUN array */ |
| 994 | *raidLUN = raid->LUN; |
| 995 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 996 | |
| 997 | /*Get Phy Params only if FP capable, or else leave it to MR firmware |
| 998 | to do the calculation.*/ |
| 999 | if (io_info->fpOkForIo) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1000 | retval = io_info->IoforUnevenSpan ? |
| 1001 | mr_spanset_get_phy_params(instance, ld, |
| 1002 | start_strip, ref_in_start_stripe, |
| 1003 | io_info, pRAID_Context, map) : |
| 1004 | MR_GetPhyParams(instance, ld, start_strip, |
| 1005 | ref_in_start_stripe, io_info, |
| 1006 | pRAID_Context, map); |
| 1007 | /* If IO on an invalid Pd, then FP is not possible.*/ |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1008 | if (io_info->devHandle == MR_PD_INVALID) |
| 1009 | io_info->fpOkForIo = FALSE; |
| 1010 | return retval; |
| 1011 | } else if (isRead) { |
| 1012 | uint stripIdx; |
| 1013 | for (stripIdx = 0; stripIdx < num_strips; stripIdx++) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1014 | retval = io_info->IoforUnevenSpan ? |
| 1015 | mr_spanset_get_phy_params(instance, ld, |
| 1016 | start_strip + stripIdx, |
| 1017 | ref_in_start_stripe, io_info, |
| 1018 | pRAID_Context, map) : |
| 1019 | MR_GetPhyParams(instance, ld, |
| 1020 | start_strip + stripIdx, ref_in_start_stripe, |
| 1021 | io_info, pRAID_Context, map); |
| 1022 | if (!retval) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1023 | return TRUE; |
| 1024 | } |
| 1025 | } |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1026 | |
| 1027 | #if SPAN_DEBUG |
| 1028 | /* Just for testing what arm we get for strip.*/ |
| 1029 | if (io_info->IoforUnevenSpan) |
| 1030 | get_arm_from_strip(instance, ld, start_strip, map); |
| 1031 | #endif |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1032 | return TRUE; |
| 1033 | } |
| 1034 | |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1035 | /* |
| 1036 | ****************************************************************************** |
| 1037 | * |
| 1038 | * This routine pepare spanset info from Valid Raid map and store it into |
| 1039 | * local copy of ldSpanInfo per instance data structure. |
| 1040 | * |
| 1041 | * Inputs : |
| 1042 | * map - LD map |
| 1043 | * ldSpanInfo - ldSpanInfo per HBA instance |
| 1044 | * |
| 1045 | */ |
| 1046 | void mr_update_span_set(struct MR_FW_RAID_MAP_ALL *map, |
| 1047 | PLD_SPAN_INFO ldSpanInfo) |
| 1048 | { |
| 1049 | u8 span, count; |
| 1050 | u32 element, span_row_width; |
| 1051 | u64 span_row; |
| 1052 | struct MR_LD_RAID *raid; |
| 1053 | LD_SPAN_SET *span_set, *span_set_prev; |
| 1054 | struct MR_QUAD_ELEMENT *quad; |
| 1055 | int ldCount; |
| 1056 | u16 ld; |
| 1057 | |
| 1058 | |
| 1059 | for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) { |
| 1060 | ld = MR_TargetIdToLdGet(ldCount, map); |
| 1061 | if (ld >= MAX_LOGICAL_DRIVES) |
| 1062 | continue; |
| 1063 | raid = MR_LdRaidGet(ld, map); |
| 1064 | for (element = 0; element < MAX_QUAD_DEPTH; element++) { |
| 1065 | for (span = 0; span < raid->spanDepth; span++) { |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1066 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
| 1067 | block_span_info.noElements) < |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1068 | element + 1) |
| 1069 | continue; |
| 1070 | span_set = &(ldSpanInfo[ld].span_set[element]); |
| 1071 | quad = &map->raidMap.ldSpanMap[ld]. |
| 1072 | spanBlock[span].block_span_info. |
| 1073 | quad[element]; |
| 1074 | |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1075 | span_set->diff = le32_to_cpu(quad->diff); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1076 | |
| 1077 | for (count = 0, span_row_width = 0; |
| 1078 | count < raid->spanDepth; count++) { |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1079 | if (le32_to_cpu(map->raidMap.ldSpanMap[ld]. |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1080 | spanBlock[count]. |
| 1081 | block_span_info. |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1082 | noElements) >= element + 1) { |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1083 | span_set->strip_offset[count] = |
| 1084 | span_row_width; |
| 1085 | span_row_width += |
| 1086 | MR_LdSpanPtrGet |
| 1087 | (ld, count, map)->spanRowDataSize; |
| 1088 | printk(KERN_INFO "megasas:" |
| 1089 | "span %x rowDataSize %x\n", |
| 1090 | count, MR_LdSpanPtrGet |
| 1091 | (ld, count, map)->spanRowDataSize); |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | span_set->span_row_data_width = span_row_width; |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1096 | span_row = mega_div64_32(((le64_to_cpu(quad->logEnd) - |
| 1097 | le64_to_cpu(quad->logStart)) + le32_to_cpu(quad->diff)), |
| 1098 | le32_to_cpu(quad->diff)); |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1099 | |
| 1100 | if (element == 0) { |
| 1101 | span_set->log_start_lba = 0; |
| 1102 | span_set->log_end_lba = |
| 1103 | ((span_row << raid->stripeShift) |
| 1104 | * span_row_width) - 1; |
| 1105 | |
| 1106 | span_set->span_row_start = 0; |
| 1107 | span_set->span_row_end = span_row - 1; |
| 1108 | |
| 1109 | span_set->data_strip_start = 0; |
| 1110 | span_set->data_strip_end = |
| 1111 | (span_row * span_row_width) - 1; |
| 1112 | |
| 1113 | span_set->data_row_start = 0; |
| 1114 | span_set->data_row_end = |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1115 | (span_row * le32_to_cpu(quad->diff)) - 1; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1116 | } else { |
| 1117 | span_set_prev = &(ldSpanInfo[ld]. |
| 1118 | span_set[element - 1]); |
| 1119 | span_set->log_start_lba = |
| 1120 | span_set_prev->log_end_lba + 1; |
| 1121 | span_set->log_end_lba = |
| 1122 | span_set->log_start_lba + |
| 1123 | ((span_row << raid->stripeShift) |
| 1124 | * span_row_width) - 1; |
| 1125 | |
| 1126 | span_set->span_row_start = |
| 1127 | span_set_prev->span_row_end + 1; |
| 1128 | span_set->span_row_end = |
| 1129 | span_set->span_row_start + span_row - 1; |
| 1130 | |
| 1131 | span_set->data_strip_start = |
| 1132 | span_set_prev->data_strip_end + 1; |
| 1133 | span_set->data_strip_end = |
| 1134 | span_set->data_strip_start + |
| 1135 | (span_row * span_row_width) - 1; |
| 1136 | |
| 1137 | span_set->data_row_start = |
| 1138 | span_set_prev->data_row_end + 1; |
| 1139 | span_set->data_row_end = |
| 1140 | span_set->data_row_start + |
Sumit.Saxena@lsi.com | 94cd65d | 2013-09-06 15:50:52 +0530 | [diff] [blame] | 1141 | (span_row * le32_to_cpu(quad->diff)) - 1; |
Sumit.Saxena@lsi.com | bc93d42 | 2013-05-22 12:35:04 +0530 | [diff] [blame] | 1142 | } |
| 1143 | break; |
| 1144 | } |
| 1145 | if (span == raid->spanDepth) |
| 1146 | break; |
| 1147 | } |
| 1148 | } |
| 1149 | #if SPAN_DEBUG |
| 1150 | getSpanInfo(map, ldSpanInfo); |
| 1151 | #endif |
| 1152 | |
| 1153 | } |
| 1154 | |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1155 | void |
| 1156 | mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map, |
| 1157 | struct LD_LOAD_BALANCE_INFO *lbInfo) |
| 1158 | { |
| 1159 | int ldCount; |
| 1160 | u16 ld; |
| 1161 | struct MR_LD_RAID *raid; |
| 1162 | |
| 1163 | for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) { |
| 1164 | ld = MR_TargetIdToLdGet(ldCount, map); |
| 1165 | if (ld >= MAX_LOGICAL_DRIVES) { |
| 1166 | lbInfo[ldCount].loadBalanceFlag = 0; |
| 1167 | continue; |
| 1168 | } |
| 1169 | |
| 1170 | raid = MR_LdRaidGet(ld, map); |
| 1171 | |
| 1172 | /* Two drive Optimal RAID 1 */ |
| 1173 | if ((raid->level == 1) && (raid->rowSize == 2) && |
| 1174 | (raid->spanDepth == 1) && raid->ldState == |
| 1175 | MR_LD_STATE_OPTIMAL) { |
| 1176 | u32 pd, arRef; |
| 1177 | |
| 1178 | lbInfo[ldCount].loadBalanceFlag = 1; |
| 1179 | |
| 1180 | /* Get the array on which this span is present */ |
| 1181 | arRef = MR_LdSpanArrayGet(ld, 0, map); |
| 1182 | |
| 1183 | /* Get the Pd */ |
| 1184 | pd = MR_ArPdGet(arRef, 0, map); |
| 1185 | /* Get dev handle from Pd */ |
| 1186 | lbInfo[ldCount].raid1DevHandle[0] = |
| 1187 | MR_PdDevHandleGet(pd, map); |
| 1188 | /* Get the Pd */ |
| 1189 | pd = MR_ArPdGet(arRef, 1, map); |
| 1190 | |
| 1191 | /* Get the dev handle from Pd */ |
| 1192 | lbInfo[ldCount].raid1DevHandle[1] = |
| 1193 | MR_PdDevHandleGet(pd, map); |
| 1194 | } else |
| 1195 | lbInfo[ldCount].loadBalanceFlag = 0; |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | u8 megasas_get_best_arm(struct LD_LOAD_BALANCE_INFO *lbInfo, u8 arm, u64 block, |
| 1200 | u32 count) |
| 1201 | { |
| 1202 | u16 pend0, pend1; |
| 1203 | u64 diff0, diff1; |
| 1204 | u8 bestArm; |
| 1205 | |
| 1206 | /* get the pending cmds for the data and mirror arms */ |
| 1207 | pend0 = atomic_read(&lbInfo->scsi_pending_cmds[0]); |
| 1208 | pend1 = atomic_read(&lbInfo->scsi_pending_cmds[1]); |
| 1209 | |
| 1210 | /* Determine the disk whose head is nearer to the req. block */ |
| 1211 | diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[0]); |
| 1212 | diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]); |
| 1213 | bestArm = (diff0 <= diff1 ? 0 : 1); |
| 1214 | |
Sumit.Saxena@lsi.com | 70b47b8 | 2013-05-22 12:30:22 +0530 | [diff] [blame] | 1215 | /*Make balance count from 16 to 4 to keep driver in sync with Firmware*/ |
| 1216 | if ((bestArm == arm && pend0 > pend1 + 4) || |
| 1217 | (bestArm != arm && pend1 > pend0 + 4)) |
adam radford | 9c915a8 | 2010-12-21 13:34:31 -0800 | [diff] [blame] | 1218 | bestArm ^= 1; |
| 1219 | |
| 1220 | /* Update the last accessed block on the correct pd */ |
| 1221 | lbInfo->last_accessed_block[bestArm] = block + count - 1; |
| 1222 | |
| 1223 | return bestArm; |
| 1224 | } |
| 1225 | |
| 1226 | u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo, |
| 1227 | struct IO_REQUEST_INFO *io_info) |
| 1228 | { |
| 1229 | u8 arm, old_arm; |
| 1230 | u16 devHandle; |
| 1231 | |
| 1232 | old_arm = lbInfo->raid1DevHandle[0] == io_info->devHandle ? 0 : 1; |
| 1233 | |
| 1234 | /* get best new arm */ |
| 1235 | arm = megasas_get_best_arm(lbInfo, old_arm, io_info->ldStartBlock, |
| 1236 | io_info->numBlocks); |
| 1237 | devHandle = lbInfo->raid1DevHandle[arm]; |
| 1238 | atomic_inc(&lbInfo->scsi_pending_cmds[arm]); |
| 1239 | |
| 1240 | return devHandle; |
| 1241 | } |