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freebsd-dev/sys/dev/mrsas/mrsas_fp.c
Xin LI 02190a5647 Correct memset size. 
Submitted by:	Sascha Wildner (swildner at dragonflybsd dot org)
Reviewed by:	Kashyap Desai <kashyap.desai avagotech.com>
MFC after:	2 weeks
2014-06-24 20:09:02 +00:00

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/*
* Copyright (c) 2014, LSI Corp.
* All rights reserved.
* Author: Marian Choy
* Support: freebsdraid@lsi.com
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of the <ORGANIZATION> nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies,either expressed or implied, of the FreeBSD Project.
*
* Send feedback to: <megaraidfbsd@lsi.com>
* Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
* ATTN: MegaRaid FreeBSD
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/mrsas/mrsas.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
/*
* Function prototypes
*/
u_int8_t MR_ValidateMapInfo(struct mrsas_softc *sc);
u_int8_t mrsas_get_best_arm(PLD_LOAD_BALANCE_INFO lbInfo, u_int8_t arm,
u_int64_t block, u_int32_t count);
u_int8_t MR_BuildRaidContext(struct mrsas_softc *sc,
struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context, MR_FW_RAID_MAP_ALL *map);
u_int8_t MR_GetPhyParams(struct mrsas_softc *sc, u_int32_t ld,
u_int64_t stripRow, u_int16_t stripRef, struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context,
MR_FW_RAID_MAP_ALL *map);
u_int16_t MR_TargetIdToLdGet(u_int32_t ldTgtId, MR_FW_RAID_MAP_ALL *map);
u_int32_t MR_LdBlockSizeGet(u_int32_t ldTgtId, MR_FW_RAID_MAP_ALL *map);
u_int16_t MR_GetLDTgtId(u_int32_t ld, MR_FW_RAID_MAP_ALL *map);
u_int16_t mrsas_get_updated_dev_handle(PLD_LOAD_BALANCE_INFO lbInfo,
struct IO_REQUEST_INFO *io_info);
u_int32_t mega_mod64(u_int64_t dividend, u_int32_t divisor);
u_int32_t MR_GetSpanBlock(u_int32_t ld, u_int64_t row, u_int64_t *span_blk,
MR_FW_RAID_MAP_ALL *map, int *div_error);
u_int64_t mega_div64_32(u_int64_t dividend, u_int32_t divisor);
void mrsas_update_load_balance_params(MR_FW_RAID_MAP_ALL *map,
PLD_LOAD_BALANCE_INFO lbInfo);
void mrsas_set_pd_lba(MRSAS_RAID_SCSI_IO_REQUEST *io_request,
u_int8_t cdb_len, struct IO_REQUEST_INFO *io_info, union ccb *ccb,
MR_FW_RAID_MAP_ALL *local_map_ptr, u_int32_t ref_tag,
u_int32_t ld_block_size);
static u_int16_t MR_LdSpanArrayGet(u_int32_t ld, u_int32_t span,
MR_FW_RAID_MAP_ALL *map);
static u_int16_t MR_PdDevHandleGet(u_int32_t pd, MR_FW_RAID_MAP_ALL *map);
static u_int16_t MR_ArPdGet(u_int32_t ar, u_int32_t arm,
MR_FW_RAID_MAP_ALL *map);
static MR_LD_SPAN *MR_LdSpanPtrGet(u_int32_t ld, u_int32_t span,
MR_FW_RAID_MAP_ALL *map);
static u_int8_t MR_LdDataArmGet(u_int32_t ld, u_int32_t armIdx,
MR_FW_RAID_MAP_ALL *map);
static MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u_int32_t ld,
MR_FW_RAID_MAP_ALL *map);
MR_LD_RAID *MR_LdRaidGet(u_int32_t ld, MR_FW_RAID_MAP_ALL *map);
/*
* Spanset related function prototypes
* Added for PRL11 configuration (Uneven span support)
*/
void mr_update_span_set(MR_FW_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo);
static u_int8_t mr_spanset_get_phy_params(struct mrsas_softc *sc, u_int32_t ld,
u_int64_t stripRow, u_int16_t stripRef, struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context, MR_FW_RAID_MAP_ALL *map);
static u_int64_t get_row_from_strip(struct mrsas_softc *sc, u_int32_t ld,
u_int64_t strip, MR_FW_RAID_MAP_ALL *map);
static u_int32_t mr_spanset_get_span_block(struct mrsas_softc *sc,
u_int32_t ld, u_int64_t row, u_int64_t *span_blk,
MR_FW_RAID_MAP_ALL *map, int *div_error);
static u_int8_t get_arm(struct mrsas_softc *sc, u_int32_t ld, u_int8_t span,
u_int64_t stripe, MR_FW_RAID_MAP_ALL *map);
/*
* Spanset related defines
* Added for PRL11 configuration(Uneven span support)
*/
#define SPAN_ROW_SIZE(map, ld, index_) MR_LdSpanPtrGet(ld, index_, map)->spanRowSize
#define SPAN_ROW_DATA_SIZE(map_, ld, index_) MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize
#define SPAN_INVALID 0xff
#define SPAN_DEBUG 0
/*
* Related Defines
*/
typedef u_int64_t REGION_KEY;
typedef u_int32_t REGION_LEN;
#define MR_LD_STATE_OPTIMAL 3
#define FALSE 0
#define TRUE 1
/*
* Related Macros
*/
#define ABS_DIFF(a,b) ( ((a) > (b)) ? ((a) - (b)) : ((b) - (a)) )
#define swap32(x) \
((unsigned int)( \
(((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
(((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
(((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
(((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
/*
* In-line functions for mod and divide of 64-bit dividend and 32-bit divisor.
* Assumes a check for a divisor of zero is not possible.
*
* @param dividend : Dividend
* @param divisor : Divisor
* @return remainder
*/
#define mega_mod64(dividend, divisor) ({ \
int remainder; \
remainder = ((u_int64_t) (dividend)) % (u_int32_t) (divisor); \
remainder;})
#define mega_div64_32(dividend, divisor) ({ \
int quotient; \
quotient = ((u_int64_t) (dividend)) / (u_int32_t) (divisor); \
quotient;})
/*
* Various RAID map access functions. These functions access the various
* parts of the RAID map and returns the appropriate parameters.
*/
MR_LD_RAID *MR_LdRaidGet(u_int32_t ld, MR_FW_RAID_MAP_ALL *map)
{
return (&map->raidMap.ldSpanMap[ld].ldRaid);
}
u_int16_t MR_GetLDTgtId(u_int32_t ld, MR_FW_RAID_MAP_ALL *map)
{
return (map->raidMap.ldSpanMap[ld].ldRaid.targetId);
}
static u_int16_t MR_LdSpanArrayGet(u_int32_t ld, u_int32_t span, MR_FW_RAID_MAP_ALL *map)
{
return map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef;
}
static u_int8_t MR_LdDataArmGet(u_int32_t ld, u_int32_t armIdx, MR_FW_RAID_MAP_ALL *map)
{
return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx];
}
static u_int16_t MR_PdDevHandleGet(u_int32_t pd, MR_FW_RAID_MAP_ALL *map)
{
return map->raidMap.devHndlInfo[pd].curDevHdl;
}
static u_int16_t MR_ArPdGet(u_int32_t ar, u_int32_t arm, MR_FW_RAID_MAP_ALL *map)
{
return map->raidMap.arMapInfo[ar].pd[arm];
}
static MR_LD_SPAN *MR_LdSpanPtrGet(u_int32_t ld, u_int32_t span, MR_FW_RAID_MAP_ALL *map)
{
return &map->raidMap.ldSpanMap[ld].spanBlock[span].span;
}
static MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u_int32_t ld, MR_FW_RAID_MAP_ALL *map)
{
return &map->raidMap.ldSpanMap[ld].spanBlock[0];
}
u_int16_t MR_TargetIdToLdGet(u_int32_t ldTgtId, MR_FW_RAID_MAP_ALL *map)
{
return map->raidMap.ldTgtIdToLd[ldTgtId];
}
u_int32_t MR_LdBlockSizeGet(u_int32_t ldTgtId, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid;
u_int32_t ld, ldBlockSize = MRSAS_SCSIBLOCKSIZE;
ld = MR_TargetIdToLdGet(ldTgtId, map);
/*
* Check if logical drive was removed.
*/
if (ld >= MAX_LOGICAL_DRIVES)
return ldBlockSize;
raid = MR_LdRaidGet(ld, map);
ldBlockSize = raid->logicalBlockLength;
if (!ldBlockSize)
ldBlockSize = MRSAS_SCSIBLOCKSIZE;
return ldBlockSize;
}
/**
* MR_ValidateMapInfo: Validate RAID map
* input: Adapter instance soft state
*
* This function checks and validates the loaded RAID map. It returns 0 if
* successful, and 1 otherwise.
*/
u_int8_t MR_ValidateMapInfo(struct mrsas_softc *sc)
{
if (!sc) {
return 1;
}
uint32_t total_map_sz;
MR_FW_RAID_MAP_ALL *map = sc->raidmap_mem[(sc->map_id & 1)];
MR_FW_RAID_MAP *pFwRaidMap = &map->raidMap;
PLD_SPAN_INFO ldSpanInfo = (PLD_SPAN_INFO) &sc->log_to_span;
total_map_sz = (sizeof(MR_FW_RAID_MAP) - sizeof(MR_LD_SPAN_MAP) +
(sizeof(MR_LD_SPAN_MAP) * pFwRaidMap->ldCount));
if (pFwRaidMap->totalSize != total_map_sz) {
device_printf(sc->mrsas_dev, "map size %x not matching ld count\n", total_map_sz);
device_printf(sc->mrsas_dev, "span map= %x\n", (unsigned int)sizeof(MR_LD_SPAN_MAP));
device_printf(sc->mrsas_dev, "pFwRaidMap->totalSize=%x\n", pFwRaidMap->totalSize);
return 1;
}
if (sc->UnevenSpanSupport) {
mr_update_span_set(map, ldSpanInfo);
}
mrsas_update_load_balance_params(map, sc->load_balance_info);
return 0;
}
/*
* ******************************************************************************
*
* Function to print info about span set created in driver from FW raid map
*
* Inputs :
* map - LD map
* ldSpanInfo - ldSpanInfo per HBA instance
*
*
* */
#if SPAN_DEBUG
static int getSpanInfo(MR_FW_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo)
{
u_int8_t span;
u_int32_t element;
MR_LD_RAID *raid;
LD_SPAN_SET *span_set;
MR_QUAD_ELEMENT *quad;
int ldCount;
u_int16_t ld;
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++)
{
ld = MR_TargetIdToLdGet(ldCount, map);
if (ld >= MAX_LOGICAL_DRIVES) {
continue;
}
raid = MR_LdRaidGet(ld, map);
printf("LD %x: span_depth=%x\n", ld, raid->spanDepth);
for (span=0; span<raid->spanDepth; span++)
printf("Span=%x, number of quads=%x\n", span,
map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements);
for (element=0; element < MAX_QUAD_DEPTH; element++) {
span_set = &(ldSpanInfo[ld].span_set[element]);
if (span_set->span_row_data_width == 0) break;
printf(" Span Set %x: width=%x, diff=%x\n", element,
(unsigned int)span_set->span_row_data_width,
(unsigned int)span_set->diff);
printf(" logical LBA start=0x%08lx, end=0x%08lx\n",
(long unsigned int)span_set->log_start_lba,
(long unsigned int)span_set->log_end_lba);
printf(" span row start=0x%08lx, end=0x%08lx\n",
(long unsigned int)span_set->span_row_start,
(long unsigned int)span_set->span_row_end);
printf(" data row start=0x%08lx, end=0x%08lx\n",
(long unsigned int)span_set->data_row_start,
(long unsigned int)span_set->data_row_end);
printf(" data strip start=0x%08lx, end=0x%08lx\n",
(long unsigned int)span_set->data_strip_start,
(long unsigned int)span_set->data_strip_end);
for (span=0; span<raid->spanDepth; span++) {
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements >=element+1){
quad = &map->raidMap.ldSpanMap[ld].
spanBlock[span].block_span_info.
quad[element];
printf(" Span=%x, Quad=%x, diff=%x\n", span,
element, quad->diff);
printf(" offset_in_span=0x%08lx\n",
(long unsigned int)quad->offsetInSpan);
printf(" logical start=0x%08lx, end=0x%08lx\n",
(long unsigned int)quad->logStart,
(long unsigned int)quad->logEnd);
}
}
}
}
return 0;
}
#endif
/*
******************************************************************************
*
* This routine calculates the Span block for given row using spanset.
*
* Inputs :
* instance - HBA instance
* ld - Logical drive number
* row - Row number
* map - LD map
*
* Outputs :
*
* span - Span number
* block - Absolute Block number in the physical disk
* div_error - Devide error code.
*/
u_int32_t mr_spanset_get_span_block(struct mrsas_softc *sc, u_int32_t ld, u_int64_t row,
u_int64_t *span_blk, MR_FW_RAID_MAP_ALL *map, int *div_error)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
LD_SPAN_SET *span_set;
MR_QUAD_ELEMENT *quad;
u_int32_t span, info;
PLD_SPAN_INFO ldSpanInfo = sc->log_to_span;
for (info=0; info < MAX_QUAD_DEPTH; info++) {
span_set = &(ldSpanInfo[ld].span_set[info]);
if (span_set->span_row_data_width == 0) break;
if (row > span_set->data_row_end) continue;
for (span=0; span<raid->spanDepth; span++)
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements >= info+1) {
quad = &map->raidMap.ldSpanMap[ld].
spanBlock[span].
block_span_info.quad[info];
if (quad->diff == 0) {
*div_error = 1;
return span;
}
if ( quad->logStart <= row &&
row <= quad->logEnd &&
(mega_mod64(row - quad->logStart,
quad->diff)) == 0 ) {
if (span_blk != NULL) {
u_int64_t blk;
blk = mega_div64_32
((row - quad->logStart),
quad->diff);
blk = (blk + quad->offsetInSpan)
<< raid->stripeShift;
*span_blk = blk;
}
return span;
}
}
}
return SPAN_INVALID;
}
/*
******************************************************************************
*
* This routine calculates the row for given strip using spanset.
*
* Inputs :
* instance - HBA instance
* ld - Logical drive number
* Strip - Strip
* map - LD map
*
* Outputs :
*
* row - row associated with strip
*/
static u_int64_t get_row_from_strip(struct mrsas_softc *sc,
u_int32_t ld, u_int64_t strip, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
LD_SPAN_SET *span_set;
PLD_SPAN_INFO ldSpanInfo = sc->log_to_span;
u_int32_t info, strip_offset, span, span_offset;
u_int64_t span_set_Strip, span_set_Row;
for (info=0; info < MAX_QUAD_DEPTH; info++) {
span_set = &(ldSpanInfo[ld].span_set[info]);
if (span_set->span_row_data_width == 0) break;
if (strip > span_set->data_strip_end) continue;
span_set_Strip = strip - span_set->data_strip_start;
strip_offset = mega_mod64(span_set_Strip,
span_set->span_row_data_width);
span_set_Row = mega_div64_32(span_set_Strip,
span_set->span_row_data_width) * span_set->diff;
for (span=0,span_offset=0; span<raid->spanDepth; span++)
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements >=info+1) {
if (strip_offset >=
span_set->strip_offset[span])
span_offset++;
else
break;
}
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug : Strip 0x%llx, span_set_Strip 0x%llx, span_set_Row 0x%llx "
"data width 0x%llx span offset 0x%llx\n", (unsigned long long)strip,
(unsigned long long)span_set_Strip,
(unsigned long long)span_set_Row,
(unsigned long long)span_set->span_row_data_width, (unsigned long long)span_offset);
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug : For strip 0x%llx row is 0x%llx\n", (unsigned long long)strip,
(unsigned long long) span_set->data_row_start +
(unsigned long long) span_set_Row + (span_offset - 1));
return (span_set->data_row_start + span_set_Row + (span_offset - 1));
}
return -1LLU;
}
/*
******************************************************************************
*
* This routine calculates the Start Strip for given row using spanset.
*
* Inputs :
* instance - HBA instance
* ld - Logical drive number
* row - Row number
* map - LD map
*
* Outputs :
*
* Strip - Start strip associated with row
*/
static u_int64_t get_strip_from_row(struct mrsas_softc *sc,
u_int32_t ld, u_int64_t row, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
LD_SPAN_SET *span_set;
MR_QUAD_ELEMENT *quad;
PLD_SPAN_INFO ldSpanInfo = sc->log_to_span;
u_int32_t span, info;
u_int64_t strip;
for (info=0; info<MAX_QUAD_DEPTH; info++) {
span_set = &(ldSpanInfo[ld].span_set[info]);
if (span_set->span_row_data_width == 0) break;
if (row > span_set->data_row_end) continue;
for (span=0; span<raid->spanDepth; span++)
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements >=info+1) {
quad = &map->raidMap.ldSpanMap[ld].
spanBlock[span].block_span_info.quad[info];
if ( quad->logStart <= row &&
row <= quad->logEnd &&
mega_mod64((row - quad->logStart),
quad->diff) == 0 ) {
strip = mega_div64_32
(((row - span_set->data_row_start)
- quad->logStart),
quad->diff);
strip *= span_set->span_row_data_width;
strip += span_set->data_strip_start;
strip += span_set->strip_offset[span];
return strip;
}
}
}
mrsas_dprint(sc, MRSAS_PRL11,"LSI Debug - get_strip_from_row: returns invalid "
"strip for ld=%x, row=%lx\n", ld, (long unsigned int)row);
return -1;
}
/*
******************************************************************************
*
* This routine calculates the Physical Arm for given strip using spanset.
*
* Inputs :
* instance - HBA instance
* ld - Logical drive number
* strip - Strip
* map - LD map
*
* Outputs :
*
* Phys Arm - Phys Arm associated with strip
*/
static u_int32_t get_arm_from_strip(struct mrsas_softc *sc,
u_int32_t ld, u_int64_t strip, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
LD_SPAN_SET *span_set;
PLD_SPAN_INFO ldSpanInfo = sc->log_to_span;
u_int32_t info, strip_offset, span, span_offset;
for (info=0; info<MAX_QUAD_DEPTH; info++) {
span_set = &(ldSpanInfo[ld].span_set[info]);
if (span_set->span_row_data_width == 0) break;
if (strip > span_set->data_strip_end) continue;
strip_offset = (u_int32_t)mega_mod64
((strip - span_set->data_strip_start),
span_set->span_row_data_width);
for (span=0,span_offset=0; span<raid->spanDepth; span++)
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements >=info+1) {
if (strip_offset >=
span_set->strip_offset[span])
span_offset =
span_set->strip_offset[span];
else
break;
}
mrsas_dprint(sc, MRSAS_PRL11, "LSI PRL11: get_arm_from_strip: "
" for ld=0x%x strip=0x%lx arm is 0x%x\n", ld,
(long unsigned int)strip, (strip_offset - span_offset));
return (strip_offset - span_offset);
}
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug: - get_arm_from_strip: returns invalid arm"
" for ld=%x strip=%lx\n", ld, (long unsigned int)strip);
return -1;
}
/* This Function will return Phys arm */
u_int8_t get_arm(struct mrsas_softc *sc, u_int32_t ld, u_int8_t span, u_int64_t stripe,
MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
/* Need to check correct default value */
u_int32_t arm = 0;
switch (raid->level) {
case 0:
case 5:
case 6:
arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span));
break;
case 1:
// start with logical arm
arm = get_arm_from_strip(sc, ld, stripe, map);
arm *= 2;
break;
}
return arm;
}
/*
******************************************************************************
*
* This routine calculates the arm, span and block for the specified stripe and
* reference in stripe using spanset
*
* Inputs :
*
* ld - Logical drive number
* stripRow - Stripe number
* stripRef - Reference in stripe
*
* Outputs :
*
* span - Span number
* block - Absolute Block number in the physical disk
*/
static u_int8_t mr_spanset_get_phy_params(struct mrsas_softc *sc, u_int32_t ld, u_int64_t stripRow,
u_int16_t stripRef, struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
u_int32_t pd, arRef;
u_int8_t physArm, span;
u_int64_t row;
u_int8_t retval = TRUE;
u_int64_t *pdBlock = &io_info->pdBlock;
u_int16_t *pDevHandle = &io_info->devHandle;
u_int32_t logArm, rowMod, armQ, arm;
u_int8_t do_invader = 0;
if ((sc->device_id == MRSAS_INVADER) || (sc->device_id == MRSAS_FURY))
do_invader = 1;
// Get row and span from io_info for Uneven Span IO.
row = io_info->start_row;
span = io_info->start_span;
if (raid->level == 6) {
logArm = get_arm_from_strip(sc, ld, stripRow, map);
rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span));
armQ = SPAN_ROW_SIZE(map,ld,span) - 1 - rowMod;
arm = armQ + 1 + logArm;
if (arm >= SPAN_ROW_SIZE(map, ld, span))
arm -= SPAN_ROW_SIZE(map ,ld ,span);
physArm = (u_int8_t)arm;
} else
// Calculate the arm
physArm = get_arm(sc, ld, span, stripRow, map);
arRef = MR_LdSpanArrayGet(ld, span, map);
pd = MR_ArPdGet(arRef, physArm, map);
if (pd != MR_PD_INVALID)
*pDevHandle = MR_PdDevHandleGet(pd, map);
else {
*pDevHandle = MR_PD_INVALID;
if ((raid->level >= 5) && ((!do_invader) || (do_invader &&
raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))
pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
else if (raid->level == 1) {
pd = MR_ArPdGet(arRef, physArm + 1, map);
if (pd != MR_PD_INVALID)
*pDevHandle = MR_PdDevHandleGet(pd, map);
}
}
*pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm;
return retval;
}
/**
* MR_BuildRaidContext: Set up Fast path RAID context
*
* This function will initiate command processing. The start/end row
* and strip information is calculated then the lock is acquired.
* This function will return 0 if region lock was acquired OR return
* num strips.
*/
u_int8_t
MR_BuildRaidContext(struct mrsas_softc *sc, struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid;
u_int32_t ld, stripSize, stripe_mask;
u_int64_t endLba, endStrip, endRow, start_row, start_strip;
REGION_KEY regStart;
REGION_LEN regSize;
u_int8_t num_strips, numRows;
u_int16_t ref_in_start_stripe, ref_in_end_stripe;
u_int64_t ldStartBlock;
u_int32_t numBlocks, ldTgtId;
u_int8_t isRead, stripIdx;
u_int8_t retval = 0;
u_int8_t startlba_span = SPAN_INVALID;
u_int64_t *pdBlock = &io_info->pdBlock;
int error_code = 0;
ldStartBlock = io_info->ldStartBlock;
numBlocks = io_info->numBlocks;
ldTgtId = io_info->ldTgtId;
isRead = io_info->isRead;
io_info->IoforUnevenSpan = 0;
io_info->start_span = SPAN_INVALID;
ld = MR_TargetIdToLdGet(ldTgtId, map);
raid = MR_LdRaidGet(ld, map);
/*
* if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero
* return FALSE
*/
if (raid->rowDataSize == 0) {
if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0)
return FALSE;
else if (sc->UnevenSpanSupport) {
io_info->IoforUnevenSpan = 1;
}
else {
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug: raid->rowDataSize is 0, but has SPAN[0] rowDataSize = 0x%0x,"
" but there is _NO_ UnevenSpanSupport\n",
MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize);
return FALSE;
}
}
stripSize = 1 << raid->stripeShift;
stripe_mask = stripSize-1;
/*
* calculate starting row and stripe, and number of strips and rows
*/
start_strip = ldStartBlock >> raid->stripeShift;
ref_in_start_stripe = (u_int16_t)(ldStartBlock & stripe_mask);
endLba = ldStartBlock + numBlocks - 1;
ref_in_end_stripe = (u_int16_t)(endLba & stripe_mask);
endStrip = endLba >> raid->stripeShift;
num_strips = (u_int8_t)(endStrip - start_strip + 1); // End strip
if (io_info->IoforUnevenSpan) {
start_row = get_row_from_strip(sc, ld, start_strip, map);
endRow = get_row_from_strip(sc, ld, endStrip, map);
if (raid->spanDepth == 1) {
startlba_span = 0;
*pdBlock = start_row << raid->stripeShift;
} else {
startlba_span = (u_int8_t)mr_spanset_get_span_block(sc, ld, start_row,
pdBlock, map, &error_code);
if (error_code == 1) {
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug: return from %s %d. Send IO w/o region lock.\n",
__func__, __LINE__);
return FALSE;
}
}
if (startlba_span == SPAN_INVALID) {
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug: return from %s %d for row 0x%llx,"
"start strip %llx endSrip %llx\n", __func__,
__LINE__, (unsigned long long)start_row,
(unsigned long long)start_strip,
(unsigned long long)endStrip);
return FALSE;
}
io_info->start_span = startlba_span;
io_info->start_row = start_row;
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug: Check Span number from %s %d for row 0x%llx, "
" start strip 0x%llx endSrip 0x%llx span 0x%x\n",
__func__, __LINE__, (unsigned long long)start_row,
(unsigned long long)start_strip,
(unsigned long long)endStrip, startlba_span);
mrsas_dprint(sc, MRSAS_PRL11, "LSI Debug : 1. start_row 0x%llx endRow 0x%llx Start span 0x%x\n",
(unsigned long long)start_row, (unsigned long long)endRow, startlba_span);
} else {
start_row = mega_div64_32(start_strip, raid->rowDataSize); // Start Row
endRow = mega_div64_32(endStrip, raid->rowDataSize);
}
numRows = (u_int8_t)(endRow - start_row + 1); // get the row count
/*
* Calculate region info. (Assume region at start of first row, and
* assume this IO needs the full row - will adjust if not true.)
*/
regStart = start_row << raid->stripeShift;
regSize = stripSize;
/* Check if we can send this I/O via FastPath */
if (raid->capability.fpCapable) {
if (isRead)
io_info->fpOkForIo = (raid->capability.fpReadCapable &&
((num_strips == 1) ||
raid->capability.
fpReadAcrossStripe));
else
io_info->fpOkForIo = (raid->capability.fpWriteCapable &&
((num_strips == 1) ||
raid->capability.
fpWriteAcrossStripe));
}
else
io_info->fpOkForIo = FALSE;
if (numRows == 1) {
if (num_strips == 1) {
/* single-strip IOs can always lock only the data needed,
multi-strip IOs always need to full stripe locked */
regStart += ref_in_start_stripe;
regSize = numBlocks;
}
}
else if (io_info->IoforUnevenSpan == 0){
// For Even span region lock optimization.
// If the start strip is the last in the start row
if (start_strip == (start_row + 1) * raid->rowDataSize - 1) {
regStart += ref_in_start_stripe;
// initialize count to sectors from startRef to end of strip
regSize = stripSize - ref_in_start_stripe;
}
// add complete rows in the middle of the transfer
if (numRows > 2)
regSize += (numRows-2) << raid->stripeShift;
// if IO ends within first strip of last row
if (endStrip == endRow*raid->rowDataSize)
regSize += ref_in_end_stripe+1;
else
regSize += stripSize;
} else {
//For Uneven span region lock optimization.
// If the start strip is the last in the start row
if (start_strip == (get_strip_from_row(sc, ld, start_row, map) +
SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) {
regStart += ref_in_start_stripe;
// initialize count to sectors from startRef to end of strip
regSize = stripSize - ref_in_start_stripe;
}
// add complete rows in the middle of the transfer
if (numRows > 2)
regSize += (numRows-2) << raid->stripeShift;
// if IO ends within first strip of last row
if (endStrip == get_strip_from_row(sc, ld, endRow, map))
regSize += ref_in_end_stripe+1;
else
regSize += stripSize;
}
pRAID_Context->timeoutValue = map->raidMap.fpPdIoTimeoutSec;
if ((sc->device_id == MRSAS_INVADER) || (sc->device_id == MRSAS_FURY))
pRAID_Context->regLockFlags = (isRead)? raid->regTypeReqOnRead : raid->regTypeReqOnWrite;
else
pRAID_Context->regLockFlags = (isRead)? REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite;
pRAID_Context->VirtualDiskTgtId = raid->targetId;
pRAID_Context->regLockRowLBA = regStart;
pRAID_Context->regLockLength = regSize;
pRAID_Context->configSeqNum = raid->seqNum;
/*
* Get Phy Params only if FP capable, or else leave it to MR firmware
* to do the calculation.
*/
if (io_info->fpOkForIo) {
retval = io_info->IoforUnevenSpan ?
mr_spanset_get_phy_params(sc, ld,
start_strip, ref_in_start_stripe, io_info,
pRAID_Context, map) :
MR_GetPhyParams(sc, ld, start_strip,
ref_in_start_stripe, io_info, pRAID_Context, map);
/* If IO on an invalid Pd, then FP is not possible */
if (io_info->devHandle == MR_PD_INVALID)
io_info->fpOkForIo = FALSE;
return retval;
}
else if (isRead) {
for (stripIdx=0; stripIdx<num_strips; stripIdx++) {
retval = io_info->IoforUnevenSpan ?
mr_spanset_get_phy_params(sc, ld,
start_strip + stripIdx,
ref_in_start_stripe, io_info,
pRAID_Context, map) :
MR_GetPhyParams(sc, ld,
start_strip + stripIdx, ref_in_start_stripe,
io_info, pRAID_Context, map);
if (!retval)
return TRUE;
}
}
#if SPAN_DEBUG
// Just for testing what arm we get for strip.
get_arm_from_strip(sc, ld, start_strip, map);
#endif
return TRUE;
}
/*
******************************************************************************
*
* This routine pepare spanset info from Valid Raid map and store it into
* local copy of ldSpanInfo per instance data structure.
*
* Inputs :
* map - LD map
* ldSpanInfo - ldSpanInfo per HBA instance
*
*/
void mr_update_span_set(MR_FW_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo)
{
u_int8_t span,count;
u_int32_t element,span_row_width;
u_int64_t span_row;
MR_LD_RAID *raid;
LD_SPAN_SET *span_set, *span_set_prev;
MR_QUAD_ELEMENT *quad;
int ldCount;
u_int16_t ld;
if (!ldSpanInfo)
return;
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++)
{
ld = MR_TargetIdToLdGet(ldCount, map);
if (ld >= MAX_LOGICAL_DRIVES)
continue;
raid = MR_LdRaidGet(ld, map);
for (element=0; element < MAX_QUAD_DEPTH; element++) {
for (span=0; span < raid->spanDepth; span++) {
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
block_span_info.noElements < element+1)
continue;
// TO-DO
span_set = &(ldSpanInfo[ld].span_set[element]);
quad = &map->raidMap.ldSpanMap[ld].
spanBlock[span].block_span_info.
quad[element];
span_set->diff = quad->diff;
for (count=0,span_row_width=0;
count<raid->spanDepth; count++) {
if (map->raidMap.ldSpanMap[ld].
spanBlock[count].
block_span_info.
noElements >=element+1) {
span_set->strip_offset[count] =
span_row_width;
span_row_width +=
MR_LdSpanPtrGet
(ld, count, map)->spanRowDataSize;
#if SPAN_DEBUG
printf("LSI Debug span %x rowDataSize %x\n",
count, MR_LdSpanPtrGet
(ld, count, map)->spanRowDataSize);
#endif
}
}
span_set->span_row_data_width = span_row_width;
span_row = mega_div64_32(((quad->logEnd -
quad->logStart) + quad->diff), quad->diff);
if (element == 0) {
span_set->log_start_lba = 0;
span_set->log_end_lba =
((span_row << raid->stripeShift) * span_row_width) - 1;
span_set->span_row_start = 0;
span_set->span_row_end = span_row - 1;
span_set->data_strip_start = 0;
span_set->data_strip_end =
(span_row * span_row_width) - 1;
span_set->data_row_start = 0;
span_set->data_row_end =
(span_row * quad->diff) - 1;
} else {
span_set_prev = &(ldSpanInfo[ld].
span_set[element - 1]);
span_set->log_start_lba =
span_set_prev->log_end_lba + 1;
span_set->log_end_lba =
span_set->log_start_lba +
((span_row << raid->stripeShift) * span_row_width) - 1;
span_set->span_row_start =
span_set_prev->span_row_end + 1;
span_set->span_row_end =
span_set->span_row_start + span_row - 1;
span_set->data_strip_start =
span_set_prev->data_strip_end + 1;
span_set->data_strip_end =
span_set->data_strip_start +
(span_row * span_row_width) - 1;
span_set->data_row_start =
span_set_prev->data_row_end + 1;
span_set->data_row_end =
span_set->data_row_start +
(span_row * quad->diff) - 1;
}
break;
}
if (span == raid->spanDepth) break; // no quads remain
}
}
#if SPAN_DEBUG
getSpanInfo(map, ldSpanInfo); //to get span set info
#endif
}
/**
* mrsas_update_load_balance_params: Update load balance parmas
* Inputs: map pointer
* Load balance info
* io_info pointer
*
* This function updates the load balance parameters for the LD config
* of a two drive optimal RAID-1.
*/
void mrsas_update_load_balance_params(MR_FW_RAID_MAP_ALL *map,
PLD_LOAD_BALANCE_INFO lbInfo)
{
int ldCount;
u_int16_t ld;
u_int32_t pd, arRef;
MR_LD_RAID *raid;
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++)
{
ld = MR_TargetIdToLdGet(ldCount, map);
if (ld >= MAX_LOGICAL_DRIVES) {
lbInfo[ldCount].loadBalanceFlag = 0;
continue;
}
raid = MR_LdRaidGet(ld, map);
/* Two drive Optimal RAID 1 */
if ((raid->level == 1) && (raid->rowSize == 2) &&
(raid->spanDepth == 1)
&& raid->ldState == MR_LD_STATE_OPTIMAL) {
lbInfo[ldCount].loadBalanceFlag = 1;
/* Get the array on which this span is present */
arRef = MR_LdSpanArrayGet(ld, 0, map);
/* Get the PD */
pd = MR_ArPdGet(arRef, 0, map);
/* Get dev handle from PD */
lbInfo[ldCount].raid1DevHandle[0] = MR_PdDevHandleGet(pd, map);
pd = MR_ArPdGet(arRef, 1, map);
lbInfo[ldCount].raid1DevHandle[1] = MR_PdDevHandleGet(pd, map);
}
else
lbInfo[ldCount].loadBalanceFlag = 0;
}
}
/**
* mrsas_set_pd_lba: Sets PD LBA
* input: io_request pointer
* CDB length
* io_info pointer
* Pointer to CCB
* Local RAID map pointer
* Start block of IO
* Block Size
*
* Used to set the PD logical block address in CDB for FP IOs.
*/
void mrsas_set_pd_lba(MRSAS_RAID_SCSI_IO_REQUEST *io_request, u_int8_t cdb_len,
struct IO_REQUEST_INFO *io_info, union ccb *ccb,
MR_FW_RAID_MAP_ALL *local_map_ptr, u_int32_t ref_tag,
u_int32_t ld_block_size)
{
MR_LD_RAID *raid;
u_int32_t ld;
u_int64_t start_blk = io_info->pdBlock;
u_int8_t *cdb = io_request->CDB.CDB32;
u_int32_t num_blocks = io_info->numBlocks;
u_int8_t opcode = 0, flagvals = 0, groupnum = 0, control = 0;
struct ccb_hdr *ccb_h = &(ccb->ccb_h);
/* Check if T10 PI (DIF) is enabled for this LD */
ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
raid = MR_LdRaidGet(ld, local_map_ptr);
if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = MRSAS_SCSI_VARIABLE_LENGTH_CMD;
cdb[7] = MRSAS_SCSI_ADDL_CDB_LEN;
if (ccb_h->flags == CAM_DIR_OUT)
cdb[9] = MRSAS_SCSI_SERVICE_ACTION_READ32;
else
cdb[9] = MRSAS_SCSI_SERVICE_ACTION_WRITE32;
cdb[10] = MRSAS_RD_WR_PROTECT_CHECK_ALL;
/* LBA */
cdb[12] = (u_int8_t)((start_blk >> 56) & 0xff);
cdb[13] = (u_int8_t)((start_blk >> 48) & 0xff);
cdb[14] = (u_int8_t)((start_blk >> 40) & 0xff);
cdb[15] = (u_int8_t)((start_blk >> 32) & 0xff);
cdb[16] = (u_int8_t)((start_blk >> 24) & 0xff);
cdb[17] = (u_int8_t)((start_blk >> 16) & 0xff);
cdb[18] = (u_int8_t)((start_blk >> 8) & 0xff);
cdb[19] = (u_int8_t)(start_blk & 0xff);
/* Logical block reference tag */
io_request->CDB.EEDP32.PrimaryReferenceTag = swap32(ref_tag);
io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
io_request->IoFlags = 32; /* Specify 32-byte cdb */
/* Transfer length */
cdb[28] = (u_int8_t)((num_blocks >> 24) & 0xff);
cdb[29] = (u_int8_t)((num_blocks >> 16) & 0xff);
cdb[30] = (u_int8_t)((num_blocks >> 8) & 0xff);
cdb[31] = (u_int8_t)(num_blocks & 0xff);
/* set SCSI IO EEDP Flags */
if (ccb_h->flags == CAM_DIR_OUT) {
io_request->EEDPFlags =
MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
}
else {
io_request->EEDPFlags =
MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
}
io_request->Control |= (0x4 << 26);
io_request->EEDPBlockSize = ld_block_size;
}
else {
/* Some drives don't support 16/12 byte CDB's, convert to 10 */
if (((cdb_len == 12) || (cdb_len == 16)) &&
(start_blk <= 0xffffffff)) {
if (cdb_len == 16) {
opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
flagvals = cdb[1];
groupnum = cdb[14];
control = cdb[15];
}
else {
opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
flagvals = cdb[1];
groupnum = cdb[10];
control = cdb[11];
}
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = opcode;
cdb[1] = flagvals;
cdb[6] = groupnum;
cdb[9] = control;
/* Transfer length */
cdb[8] = (u_int8_t)(num_blocks & 0xff);
cdb[7] = (u_int8_t)((num_blocks >> 8) & 0xff);
io_request->IoFlags = 10; /* Specify 10-byte cdb */
cdb_len = 10;
} else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
/* Convert to 16 byte CDB for large LBA's */
switch (cdb_len) {
case 6:
opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
control = cdb[5];
break;
case 10:
opcode = cdb[0] == READ_10 ? READ_16 : WRITE_16;
flagvals = cdb[1];
groupnum = cdb[6];
control = cdb[9];
break;
case 12:
opcode = cdb[0] == READ_12 ? READ_16 : WRITE_16;
flagvals = cdb[1];
groupnum = cdb[10];
control = cdb[11];
break;
}
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = opcode;
cdb[1] = flagvals;
cdb[14] = groupnum;
cdb[15] = control;
/* Transfer length */
cdb[13] = (u_int8_t)(num_blocks & 0xff);
cdb[12] = (u_int8_t)((num_blocks >> 8) & 0xff);
cdb[11] = (u_int8_t)((num_blocks >> 16) & 0xff);
cdb[10] = (u_int8_t)((num_blocks >> 24) & 0xff);
io_request->IoFlags = 16; /* Specify 16-byte cdb */
cdb_len = 16;
} else if ((cdb_len == 6) && (start_blk > 0x1fffff)) {
/* convert to 10 byte CDB */
opcode = cdb[0] == READ_6 ? READ_10 : WRITE_10;
control = cdb[5];
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = opcode;
cdb[9] = control;
/* Set transfer length */
cdb[8] = (u_int8_t)(num_blocks & 0xff);
cdb[7] = (u_int8_t)((num_blocks >> 8) & 0xff);
/* Specify 10-byte cdb */
cdb_len = 10;
}
/* Fall through normal case, just load LBA here */
switch (cdb_len)
{
case 6:
{
u_int8_t val = cdb[1] & 0xE0;
cdb[3] = (u_int8_t)(start_blk & 0xff);
cdb[2] = (u_int8_t)((start_blk >> 8) & 0xff);
cdb[1] = val | ((u_int8_t)(start_blk >> 16) & 0x1f);
break;
}
case 10:
cdb[5] = (u_int8_t)(start_blk & 0xff);
cdb[4] = (u_int8_t)((start_blk >> 8) & 0xff);
cdb[3] = (u_int8_t)((start_blk >> 16) & 0xff);
cdb[2] = (u_int8_t)((start_blk >> 24) & 0xff);
break;
case 12:
cdb[5] = (u_int8_t)(start_blk & 0xff);
cdb[4] = (u_int8_t)((start_blk >> 8) & 0xff);
cdb[3] = (u_int8_t)((start_blk >> 16) & 0xff);
cdb[2] = (u_int8_t)((start_blk >> 24) & 0xff);
break;
case 16:
cdb[9] = (u_int8_t)(start_blk & 0xff);
cdb[8] = (u_int8_t)((start_blk >> 8) & 0xff);
cdb[7] = (u_int8_t)((start_blk >> 16) & 0xff);
cdb[6] = (u_int8_t)((start_blk >> 24) & 0xff);
cdb[5] = (u_int8_t)((start_blk >> 32) & 0xff);
cdb[4] = (u_int8_t)((start_blk >> 40) & 0xff);
cdb[3] = (u_int8_t)((start_blk >> 48) & 0xff);
cdb[2] = (u_int8_t)((start_blk >> 56) & 0xff);
break;
}
}
}
/**
* mrsas_get_best_arm Determine the best spindle arm
* Inputs: Load balance info
*
* This function determines and returns the best arm by looking at the
* parameters of the last PD access.
*/
u_int8_t mrsas_get_best_arm(PLD_LOAD_BALANCE_INFO lbInfo, u_int8_t arm,
u_int64_t block, u_int32_t count)
{
u_int16_t pend0, pend1;
u_int64_t diff0, diff1;
u_int8_t bestArm;
/* get the pending cmds for the data and mirror arms */
pend0 = atomic_read(&lbInfo->scsi_pending_cmds[0]);
pend1 = atomic_read(&lbInfo->scsi_pending_cmds[1]);
/* Determine the disk whose head is nearer to the req. block */
diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[0]);
diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]);
bestArm = (diff0 <= diff1 ? 0 : 1);
if ((bestArm == arm && pend0 > pend1 + 16) || (bestArm != arm && pend1 > pend0 + 16))
bestArm ^= 1;
/* Update the last accessed block on the correct pd */
lbInfo->last_accessed_block[bestArm] = block + count - 1;
return bestArm;
}
/**
* mrsas_get_updated_dev_handle Get the update dev handle
* Inputs: Load balance info
* io_info pointer
*
* This function determines and returns the updated dev handle.
*/
u_int16_t mrsas_get_updated_dev_handle(PLD_LOAD_BALANCE_INFO lbInfo,
struct IO_REQUEST_INFO *io_info)
{
u_int8_t arm, old_arm;
u_int16_t devHandle;
old_arm = lbInfo->raid1DevHandle[0] == io_info->devHandle ? 0 : 1;
/* get best new arm */
arm = mrsas_get_best_arm(lbInfo, old_arm, io_info->ldStartBlock, io_info->numBlocks);
devHandle = lbInfo->raid1DevHandle[arm];
atomic_inc(&lbInfo->scsi_pending_cmds[arm]);
return devHandle;
}
/**
* MR_GetPhyParams Calculates arm, span, and block
* Inputs: Adapter instance soft state
* Logical drive number (LD)
* Stripe number (stripRow)
* Reference in stripe (stripRef)
* Outputs: Span number
* Absolute Block number in the physical disk
*
* This routine calculates the arm, span and block for the specified stripe
* and reference in stripe.
*/
u_int8_t MR_GetPhyParams(struct mrsas_softc *sc, u_int32_t ld,
u_int64_t stripRow,
u_int16_t stripRef, struct IO_REQUEST_INFO *io_info,
RAID_CONTEXT *pRAID_Context, MR_FW_RAID_MAP_ALL *map)
{
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
u_int32_t pd, arRef;
u_int8_t physArm, span;
u_int64_t row;
u_int8_t retval = TRUE;
int error_code = 0;
u_int64_t *pdBlock = &io_info->pdBlock;
u_int16_t *pDevHandle = &io_info->devHandle;
u_int32_t rowMod, armQ, arm, logArm;
u_int8_t do_invader = 0;
if ((sc->device_id == MRSAS_INVADER) || (sc->device_id == MRSAS_FURY))
do_invader = 1;
row = mega_div64_32(stripRow, raid->rowDataSize);
if (raid->level == 6) {
logArm = mega_mod64(stripRow, raid->rowDataSize); // logical arm within row
if (raid->rowSize == 0)
return FALSE;
rowMod = mega_mod64(row, raid->rowSize); // get logical row mod
armQ = raid->rowSize-1-rowMod; // index of Q drive
arm = armQ+1+logArm; // data always logically follows Q
if (arm >= raid->rowSize) // handle wrap condition
arm -= raid->rowSize;
physArm = (u_int8_t)arm;
}
else {
if (raid->modFactor == 0)
return FALSE;
physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow, raid->modFactor), map);
}
if (raid->spanDepth == 1) {
span = 0;
*pdBlock = row << raid->stripeShift;
}
else {
span = (u_int8_t)MR_GetSpanBlock(ld, row, pdBlock, map, &error_code);
if (error_code == 1)
return FALSE;
}
/* Get the array on which this span is present */
arRef = MR_LdSpanArrayGet(ld, span, map);
pd = MR_ArPdGet(arRef, physArm, map); // Get the Pd.
if (pd != MR_PD_INVALID)
*pDevHandle = MR_PdDevHandleGet(pd, map); // Get dev handle from Pd.
else {
*pDevHandle = MR_PD_INVALID; // set dev handle as invalid.
if ((raid->level >= 5) && ((!do_invader) || (do_invader &&
raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))
pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
else if (raid->level == 1) {
pd = MR_ArPdGet(arRef, physArm + 1, map); // Get Alternate Pd.
if (pd != MR_PD_INVALID)
*pDevHandle = MR_PdDevHandleGet(pd, map);//Get dev handle from Pd.
}
}
*pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm;
return retval;
}
/**
* MR_GetSpanBlock Calculates span block
* Inputs: LD
* row
* PD span block
* RAID map pointer
* Outputs: Span number
* Error code
*
* This routine calculates the span from the span block info.
*/
u_int32_t MR_GetSpanBlock(u_int32_t ld, u_int64_t row, u_int64_t *span_blk,
MR_FW_RAID_MAP_ALL *map, int *div_error)
{
MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map);
MR_QUAD_ELEMENT *quad;
MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
u_int32_t span, j;
u_int64_t blk, debugBlk;
for (span=0; span < raid->spanDepth; span++, pSpanBlock++) {
for (j=0; j < pSpanBlock->block_span_info.noElements; j++) {
quad = &pSpanBlock->block_span_info.quad[j];
if (quad->diff == 0) {
*div_error = 1;
return span;
}
if (quad->logStart <= row && row <= quad->logEnd &&
(mega_mod64(row-quad->logStart, quad->diff)) == 0) {
if (span_blk != NULL) {
blk = mega_div64_32((row-quad->logStart), quad->diff);
debugBlk = blk;
blk = (blk + quad->offsetInSpan) << raid->stripeShift;
*span_blk = blk;
}
return span;
}
}
}
return span;
}
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