2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * **********************************************************************
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Solaris MegaRAID device driver for SAS2.0 controllers
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Copyright (c) 2008-2012, LSI Logic Corporation.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * All rights reserved.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Swaminathan K S
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Arun Chandrashekhar
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Shakeel Bukhari
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This module contains functions for device drivers
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * to get pd-ld mapping information.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * **********************************************************************
a1ed883a3c2acc53bbb9a171ef07aeb8eaf78736Garrett D'Amore * Copyright 2015 Garrett D'Amore <garrett@damore.org>
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This function will check if FAST IO is possible on this logical drive
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * by checking the EVENT information available in the driver
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald#define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldstatic void mr_update_load_balance_params(MR_FW_RAID_MAP_ALL *,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (map->raidMap.ldSpanMap[ld].ldRaid.targetId);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_LdSpanInfoGet(U32 ld, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (&map->raidMap.ldSpanMap[ld].spanBlock[0]);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_LdDataArmGet(U32 ld, U32 armIdx, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (map->raidMap.ldSpanMap[ld].dataArmMap[armIdx]);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_ArPdGet(U32 ar, U32 arm, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_LdSpanArrayGet(U32 ld, U32 span, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_PdDevHandleGet(U32 pd, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (map->raidMap.devHndlInfo[pd].curDevHdl);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_TargetIdToLdGet(U32 ldTgtId, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_CheckDIF(U32 ldTgtId, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_LdSpanPtrGet(U32 ld, U32 span, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald return (&map->raidMap.ldSpanMap[ld].spanBlock[span].span);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This function will validate Map info data provided by FW
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_ValidateMapInfo(MR_FW_RAID_MAP_ALL *map, PLD_LOAD_BALANCE_INFO lbInfo)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald U32 fwsize = sizeof (MR_FW_RAID_MAP) - sizeof (MR_LD_SPAN_MAP) +
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald (sizeof (MR_LD_SPAN_MAP) * pFwRaidMap->ldCount);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald "map info structure size 0x%x is "
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* sizeof (foo) returns size_t, which is *LONG*. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald con_log(CL_ANN1, (CE_NOTE, "span map 0x%x total size 0x%x\n",\
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald (int)sizeof (MR_LD_SPAN_MAP), pFwRaidMap->totalSize));
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_GetSpanBlock(U32 ld, U64 row, U64 *span_blk, MR_FW_RAID_MAP_ALL *map,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald for (j = 0; j < pSpanBlock->block_span_info.noElements; j++) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald if (qe->logStart <= row && row <= qe->logEnd &&
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * *************************************************************
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This routine calculates the arm, span and block for
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * the specified stripe and reference in stripe.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * ld - Logical drive number
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * stripRow - Stripe number
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * stripRef - Reference in stripe
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * span - Span number
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * block - Absolute Block number in the physical disk
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_GetPhyParams(struct mrsas_instance *instance, U32 ld, U64 stripRow,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald MPI2_SCSI_IO_VENDOR_UNIQUE *pRAID_Context, MR_FW_RAID_MAP_ALL *map)
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald span = (U8)MR_GetSpanBlock(ld, row, pdBlock, map, &error_code);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get the array on which this span is present. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get the Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get dev handle from Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald *pDevHandle = MR_PD_INVALID; /* set dev handle as invalid. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald raid->regTypeReqOnRead != REGION_TYPE_UNUSED))) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get Alternate Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get dev handle from Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald *pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) |
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * ***********************************************************************
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * MR_BuildRaidContext function
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This function will initiate command processing. The start/end row and strip
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * information is calculated then the lock is acquired.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * This function will return 0 if region lock
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * was acquired OR return num strips ???
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldMR_BuildRaidContext(struct mrsas_instance *instance,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald struct IO_REQUEST_INFO *io_info, MPI2_SCSI_IO_VENDOR_UNIQUE *pRAID_Context,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * calculate starting row and stripe, and number of strips and rows
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald start_strip = ldStartBlock >> raid->stripeShift;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald ref_in_start_stripe = (U16)(ldStartBlock & stripe_mask);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald ref_in_end_stripe = (U16)(endLba & stripe_mask);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Check to make sure is not dividing by zero */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* get the row count */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * calculate region info.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Check if we can send this I/O via FastPath */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald io_info->fpOkForIo = (raid->capability.fpReadCapable &&
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Check for DIF support
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald if (start_strip == (start_row + 1) * raid->rowDataSize - 1) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald pRAID_Context->timeoutValue = map->raidMap.fpPdIoTimeoutSec;
a1ed883a3c2acc53bbb9a171ef07aeb8eaf78736Garrett D'Amore if ((instance->device_id == PCI_DEVICE_ID_LSI_INVADER) ||
a1ed883a3c2acc53bbb9a171ef07aeb8eaf78736Garrett D'Amore (instance->device_id == PCI_DEVICE_ID_LSI_FURY)) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald raid->regTypeReqOnRead : raid->regTypeReqOnWrite;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * Get Phy Params only if FP capable,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald * or else leave it to MR firmware to do the calculation.
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* if fast path possible then get the physical parameters */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald retval = MR_GetPhyParams(instance, ld, start_strip,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* If IO on an invalid Pd, then FP is not possible. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald } else if (isRead) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald for (stripIdx = 0; stripIdx < num_strips; stripIdx++) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldmr_update_load_balance_params(MR_FW_RAID_MAP_ALL *map,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) {
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Two drive Optimal RAID 1 */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald if ((raid->level == 1) && (raid->rowSize == 2) &&
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get the array on which this span is present. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald pd = MR_ArPdGet(arRef, 0, map); /* Get the Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get dev handle from Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald pd = MR_ArPdGet(arRef, 1, map); /* Get the Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Get dev handle from Pd. */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald "mrsas: ld=%d load balancing enabled \n", ldCount));
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldmegasas_get_best_arm(PLD_LOAD_BALANCE_INFO lbInfo, U8 arm, U64 block,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* get the pending cmds for the data and mirror arms */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Determine the disk whose head is nearer to the req. block */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[0]);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]);
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* Update the last accessed block on the correct pd */
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald lbInfo->last_accessed_block[bestArm] = block + count - 1;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonaldget_updated_dev_handle(PLD_LOAD_BALANCE_INFO lbInfo,
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald old_arm = lbInfo->raid1DevHandle[0] == io_info->devHandle ? 0 : 1;
2ffc8bca2d4d633ffdea78ed925cd1ca63584844Dan McDonald /* get best new arm */