2 * Linux MegaRAID driver for SAS based RAID controllers
4 * Copyright (c) 2009-2012 LSI Corporation.
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.
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.
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
20 * FILE: megaraid_sas_fp.c
22 * Authors: LSI Corporation
27 * Send feedback to: <megaraidlinux@lsi.com>
29 * Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
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>
42 #include <linux/uio.h>
43 #include <linux/uaccess.h>
45 #include <linux/compat.h>
46 #include <linux/blkdev.h>
47 #include <linux/poll.h>
49 #include <scsi/scsi.h>
50 #include <scsi/scsi_cmnd.h>
51 #include <scsi/scsi_device.h>
52 #include <scsi/scsi_host.h>
54 #include "megaraid_sas_fusion.h"
55 #include "megaraid_sas.h"
56 #include <asm/div64.h>
58 #define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
59 #define MR_LD_STATE_OPTIMAL 3
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
69 void mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL
*map
,
70 struct LD_LOAD_BALANCE_INFO
*lbInfo
);
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
);
80 u32
mega_mod64(u64 dividend
, u32 divisor
)
86 printk(KERN_ERR
"megasas : DIVISOR is zero, in div fn\n");
88 remainder
= do_div(d
, divisor
);
93 * @param dividend : Dividend
94 * @param divisor : Divisor
98 u64
mega_div64_32(uint64_t dividend
, uint32_t divisor
)
104 printk(KERN_ERR
"megasas : DIVISOR is zero in mod fn\n");
107 remainder
= do_div(d
, divisor
);
112 struct MR_LD_RAID
*MR_LdRaidGet(u32 ld
, struct MR_FW_RAID_MAP_ALL
*map
)
114 return &map
->raidMap
.ldSpanMap
[ld
].ldRaid
;
117 static struct MR_SPAN_BLOCK_INFO
*MR_LdSpanInfoGet(u32 ld
,
118 struct MR_FW_RAID_MAP_ALL
121 return &map
->raidMap
.ldSpanMap
[ld
].spanBlock
[0];
124 static u8
MR_LdDataArmGet(u32 ld
, u32 armIdx
, struct MR_FW_RAID_MAP_ALL
*map
)
126 return map
->raidMap
.ldSpanMap
[ld
].dataArmMap
[armIdx
];
129 static u16
MR_ArPdGet(u32 ar
, u32 arm
, struct MR_FW_RAID_MAP_ALL
*map
)
131 return map
->raidMap
.arMapInfo
[ar
].pd
[arm
];
134 static u16
MR_LdSpanArrayGet(u32 ld
, u32 span
, struct MR_FW_RAID_MAP_ALL
*map
)
136 return map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].span
.arrayRef
;
139 static u16
MR_PdDevHandleGet(u32 pd
, struct MR_FW_RAID_MAP_ALL
*map
)
141 return map
->raidMap
.devHndlInfo
[pd
].curDevHdl
;
144 u16
MR_GetLDTgtId(u32 ld
, struct MR_FW_RAID_MAP_ALL
*map
)
146 return map
->raidMap
.ldSpanMap
[ld
].ldRaid
.targetId
;
149 u16
MR_TargetIdToLdGet(u32 ldTgtId
, struct MR_FW_RAID_MAP_ALL
*map
)
151 return map
->raidMap
.ldTgtIdToLd
[ldTgtId
];
154 static struct MR_LD_SPAN
*MR_LdSpanPtrGet(u32 ld
, u32 span
,
155 struct MR_FW_RAID_MAP_ALL
*map
)
157 return &map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].span
;
161 * This function will validate Map info data provided by FW
163 u8
MR_ValidateMapInfo(struct megasas_instance
*instance
)
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
;
169 struct MR_FW_RAID_MAP
*pFwRaidMap
= &map
->raidMap
;
171 if (pFwRaidMap
->totalSize
!=
172 (sizeof(struct MR_FW_RAID_MAP
) -sizeof(struct MR_LD_SPAN_MAP
) +
173 (sizeof(struct MR_LD_SPAN_MAP
) *pFwRaidMap
->ldCount
))) {
174 printk(KERN_ERR
"megasas: map info structure size 0x%x is not matching with ld count\n",
175 (unsigned int)((sizeof(struct MR_FW_RAID_MAP
) -
176 sizeof(struct MR_LD_SPAN_MAP
)) +
177 (sizeof(struct MR_LD_SPAN_MAP
) *
178 pFwRaidMap
->ldCount
)));
179 printk(KERN_ERR
"megasas: span map %x, pFwRaidMap->totalSize "
180 ": %x\n", (unsigned int)sizeof(struct MR_LD_SPAN_MAP
),
181 pFwRaidMap
->totalSize
);
185 if (instance
->UnevenSpanSupport
)
186 mr_update_span_set(map
, ldSpanInfo
);
188 mr_update_load_balance_params(map
, lbInfo
);
193 u32
MR_GetSpanBlock(u32 ld
, u64 row
, u64
*span_blk
,
194 struct MR_FW_RAID_MAP_ALL
*map
)
196 struct MR_SPAN_BLOCK_INFO
*pSpanBlock
= MR_LdSpanInfoGet(ld
, map
);
197 struct MR_QUAD_ELEMENT
*quad
;
198 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
201 for (span
= 0; span
< raid
->spanDepth
; span
++, pSpanBlock
++) {
203 for (j
= 0; j
< pSpanBlock
->block_span_info
.noElements
; j
++) {
204 quad
= &pSpanBlock
->block_span_info
.quad
[j
];
208 if (quad
->logStart
<= row
&& row
<= quad
->logEnd
&&
209 (mega_mod64(row
-quad
->logStart
, quad
->diff
)) == 0) {
210 if (span_blk
!= NULL
) {
214 (row
-quad
->logStart
),
218 blk
= (blk
+ quad
->offsetInSpan
) <<
230 ******************************************************************************
232 * Function to print info about span set created in driver from FW raid map
236 * ldSpanInfo - ldSpanInfo per HBA instance
239 static int getSpanInfo(struct MR_FW_RAID_MAP_ALL
*map
, PLD_SPAN_INFO ldSpanInfo
)
244 struct MR_LD_RAID
*raid
;
245 LD_SPAN_SET
*span_set
;
246 struct MR_QUAD_ELEMENT
*quad
;
250 for (ldCount
= 0; ldCount
< MAX_LOGICAL_DRIVES
; ldCount
++) {
251 ld
= MR_TargetIdToLdGet(ldCount
, map
);
252 if (ld
>= MAX_LOGICAL_DRIVES
)
254 raid
= MR_LdRaidGet(ld
, map
);
255 dev_dbg(&instance
->pdev
->dev
, "LD %x: span_depth=%x\n",
256 ld
, raid
->spanDepth
);
257 for (span
= 0; span
< raid
->spanDepth
; span
++)
258 dev_dbg(&instance
->pdev
->dev
, "Span=%x,"
259 " number of quads=%x\n", span
,
260 map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
261 block_span_info
.noElements
);
262 for (element
= 0; element
< MAX_QUAD_DEPTH
; element
++) {
263 span_set
= &(ldSpanInfo
[ld
].span_set
[element
]);
264 if (span_set
->span_row_data_width
== 0)
267 dev_dbg(&instance
->pdev
->dev
, "Span Set %x:"
268 "width=%x, diff=%x\n", element
,
269 (unsigned int)span_set
->span_row_data_width
,
270 (unsigned int)span_set
->diff
);
271 dev_dbg(&instance
->pdev
->dev
, "logical LBA"
272 "start=0x%08lx, end=0x%08lx\n",
273 (long unsigned int)span_set
->log_start_lba
,
274 (long unsigned int)span_set
->log_end_lba
);
275 dev_dbg(&instance
->pdev
->dev
, "span row start=0x%08lx,"
277 (long unsigned int)span_set
->span_row_start
,
278 (long unsigned int)span_set
->span_row_end
);
279 dev_dbg(&instance
->pdev
->dev
, "data row start=0x%08lx,"
281 (long unsigned int)span_set
->data_row_start
,
282 (long unsigned int)span_set
->data_row_end
);
283 dev_dbg(&instance
->pdev
->dev
, "data strip start=0x%08lx,"
285 (long unsigned int)span_set
->data_strip_start
,
286 (long unsigned int)span_set
->data_strip_end
);
288 for (span
= 0; span
< raid
->spanDepth
; span
++) {
289 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
290 block_span_info
.noElements
>=
292 quad
= &map
->raidMap
.ldSpanMap
[ld
].
293 spanBlock
[span
].block_span_info
.
295 dev_dbg(&instance
->pdev
->dev
, "Span=%x,"
296 "Quad=%x, diff=%x\n", span
,
297 element
, quad
->diff
);
298 dev_dbg(&instance
->pdev
->dev
,
299 "offset_in_span=0x%08lx\n",
300 (long unsigned int)quad
->offsetInSpan
);
301 dev_dbg(&instance
->pdev
->dev
,
302 "logical start=0x%08lx, end=0x%08lx\n",
303 (long unsigned int)quad
->logStart
,
304 (long unsigned int)quad
->logEnd
);
314 ******************************************************************************
316 * This routine calculates the Span block for given row using spanset.
319 * instance - HBA instance
320 * ld - Logical drive number
327 * block - Absolute Block number in the physical disk
328 * div_error - Devide error code.
331 u32
mr_spanset_get_span_block(struct megasas_instance
*instance
,
332 u32 ld
, u64 row
, u64
*span_blk
, struct MR_FW_RAID_MAP_ALL
*map
)
334 struct fusion_context
*fusion
= instance
->ctrl_context
;
335 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
336 LD_SPAN_SET
*span_set
;
337 struct MR_QUAD_ELEMENT
*quad
;
339 PLD_SPAN_INFO ldSpanInfo
= fusion
->log_to_span
;
341 for (info
= 0; info
< MAX_QUAD_DEPTH
; info
++) {
342 span_set
= &(ldSpanInfo
[ld
].span_set
[info
]);
344 if (span_set
->span_row_data_width
== 0)
347 if (row
> span_set
->data_row_end
)
350 for (span
= 0; span
< raid
->spanDepth
; span
++)
351 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
352 block_span_info
.noElements
>= info
+1) {
353 quad
= &map
->raidMap
.ldSpanMap
[ld
].
355 block_span_info
.quad
[info
];
358 if (quad
->logStart
<= row
&&
359 row
<= quad
->logEnd
&&
360 (mega_mod64(row
- quad
->logStart
,
362 if (span_blk
!= NULL
) {
365 ((row
- quad
->logStart
),
367 blk
= (blk
+ quad
->offsetInSpan
)
368 << raid
->stripeShift
;
379 ******************************************************************************
381 * This routine calculates the row for given strip using spanset.
384 * instance - HBA instance
385 * ld - Logical drive number
391 * row - row associated with strip
394 static u64
get_row_from_strip(struct megasas_instance
*instance
,
395 u32 ld
, u64 strip
, struct MR_FW_RAID_MAP_ALL
*map
)
397 struct fusion_context
*fusion
= instance
->ctrl_context
;
398 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
399 LD_SPAN_SET
*span_set
;
400 PLD_SPAN_INFO ldSpanInfo
= fusion
->log_to_span
;
401 u32 info
, strip_offset
, span
, span_offset
;
402 u64 span_set_Strip
, span_set_Row
, retval
;
404 for (info
= 0; info
< MAX_QUAD_DEPTH
; info
++) {
405 span_set
= &(ldSpanInfo
[ld
].span_set
[info
]);
407 if (span_set
->span_row_data_width
== 0)
409 if (strip
> span_set
->data_strip_end
)
412 span_set_Strip
= strip
- span_set
->data_strip_start
;
413 strip_offset
= mega_mod64(span_set_Strip
,
414 span_set
->span_row_data_width
);
415 span_set_Row
= mega_div64_32(span_set_Strip
,
416 span_set
->span_row_data_width
) * span_set
->diff
;
417 for (span
= 0, span_offset
= 0; span
< raid
->spanDepth
; span
++)
418 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
419 block_span_info
.noElements
>= info
+1) {
421 span_set
->strip_offset
[span
])
427 dev_info(&instance
->pdev
->dev
, "Strip 0x%llx,"
428 "span_set_Strip 0x%llx, span_set_Row 0x%llx"
429 "data width 0x%llx span offset 0x%x\n", strip
,
430 (unsigned long long)span_set_Strip
,
431 (unsigned long long)span_set_Row
,
432 (unsigned long long)span_set
->span_row_data_width
,
434 dev_info(&instance
->pdev
->dev
, "For strip 0x%llx"
435 "row is 0x%llx\n", strip
,
436 (unsigned long long) span_set
->data_row_start
+
437 (unsigned long long) span_set_Row
+ (span_offset
- 1));
439 retval
= (span_set
->data_row_start
+ span_set_Row
+
448 ******************************************************************************
450 * This routine calculates the Start Strip for given row using spanset.
453 * instance - HBA instance
454 * ld - Logical drive number
460 * Strip - Start strip associated with row
463 static u64
get_strip_from_row(struct megasas_instance
*instance
,
464 u32 ld
, u64 row
, struct MR_FW_RAID_MAP_ALL
*map
)
466 struct fusion_context
*fusion
= instance
->ctrl_context
;
467 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
468 LD_SPAN_SET
*span_set
;
469 struct MR_QUAD_ELEMENT
*quad
;
470 PLD_SPAN_INFO ldSpanInfo
= fusion
->log_to_span
;
474 for (info
= 0; info
< MAX_QUAD_DEPTH
; info
++) {
475 span_set
= &(ldSpanInfo
[ld
].span_set
[info
]);
477 if (span_set
->span_row_data_width
== 0)
479 if (row
> span_set
->data_row_end
)
482 for (span
= 0; span
< raid
->spanDepth
; span
++)
483 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
484 block_span_info
.noElements
>= info
+1) {
485 quad
= &map
->raidMap
.ldSpanMap
[ld
].
486 spanBlock
[span
].block_span_info
.quad
[info
];
487 if (quad
->logStart
<= row
&&
488 row
<= quad
->logEnd
&&
489 mega_mod64((row
- quad
->logStart
),
491 strip
= mega_div64_32
492 (((row
- span_set
->data_row_start
)
495 strip
*= span_set
->span_row_data_width
;
496 strip
+= span_set
->data_strip_start
;
497 strip
+= span_set
->strip_offset
[span
];
502 dev_err(&instance
->pdev
->dev
, "get_strip_from_row"
503 "returns invalid strip for ld=%x, row=%lx\n",
504 ld
, (long unsigned int)row
);
509 ******************************************************************************
511 * This routine calculates the Physical Arm for given strip using spanset.
514 * instance - HBA instance
515 * ld - Logical drive number
521 * Phys Arm - Phys Arm associated with strip
524 static u32
get_arm_from_strip(struct megasas_instance
*instance
,
525 u32 ld
, u64 strip
, struct MR_FW_RAID_MAP_ALL
*map
)
527 struct fusion_context
*fusion
= instance
->ctrl_context
;
528 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
529 LD_SPAN_SET
*span_set
;
530 PLD_SPAN_INFO ldSpanInfo
= fusion
->log_to_span
;
531 u32 info
, strip_offset
, span
, span_offset
, retval
;
533 for (info
= 0 ; info
< MAX_QUAD_DEPTH
; info
++) {
534 span_set
= &(ldSpanInfo
[ld
].span_set
[info
]);
536 if (span_set
->span_row_data_width
== 0)
538 if (strip
> span_set
->data_strip_end
)
541 strip_offset
= (uint
)mega_mod64
542 ((strip
- span_set
->data_strip_start
),
543 span_set
->span_row_data_width
);
545 for (span
= 0, span_offset
= 0; span
< raid
->spanDepth
; span
++)
546 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
547 block_span_info
.noElements
>= info
+1) {
549 span_set
->strip_offset
[span
])
551 span_set
->strip_offset
[span
];
556 dev_info(&instance
->pdev
->dev
, "get_arm_from_strip:"
557 "for ld=0x%x strip=0x%lx arm is 0x%x\n", ld
,
558 (long unsigned int)strip
, (strip_offset
- span_offset
));
560 retval
= (strip_offset
- span_offset
);
564 dev_err(&instance
->pdev
->dev
, "get_arm_from_strip"
565 "returns invalid arm for ld=%x strip=%lx\n",
566 ld
, (long unsigned int)strip
);
571 /* This Function will return Phys arm */
572 u8
get_arm(struct megasas_instance
*instance
, u32 ld
, u8 span
, u64 stripe
,
573 struct MR_FW_RAID_MAP_ALL
*map
)
575 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
576 /* Need to check correct default value */
579 switch (raid
->level
) {
583 arm
= mega_mod64(stripe
, SPAN_ROW_SIZE(map
, ld
, span
));
586 /* start with logical arm */
587 arm
= get_arm_from_strip(instance
, ld
, stripe
, map
);
598 ******************************************************************************
600 * This routine calculates the arm, span and block for the specified stripe and
601 * reference in stripe using spanset
605 * ld - Logical drive number
606 * stripRow - Stripe number
607 * stripRef - Reference in stripe
612 * block - Absolute Block number in the physical disk
614 static u8
mr_spanset_get_phy_params(struct megasas_instance
*instance
, u32 ld
,
615 u64 stripRow
, u16 stripRef
, struct IO_REQUEST_INFO
*io_info
,
616 struct RAID_CONTEXT
*pRAID_Context
,
617 struct MR_FW_RAID_MAP_ALL
*map
)
619 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
625 u64
*pdBlock
= &io_info
->pdBlock
;
626 u16
*pDevHandle
= &io_info
->devHandle
;
627 u32 logArm
, rowMod
, armQ
, arm
;
629 if ((instance
->pdev
->device
== PCI_DEVICE_ID_LSI_INVADER
||
630 instance
->pdev
->device
== PCI_DEVICE_ID_LSI_FURY
))
633 /*Get row and span from io_info for Uneven Span IO.*/
634 row
= io_info
->start_row
;
635 span
= io_info
->start_span
;
638 if (raid
->level
== 6) {
639 logArm
= get_arm_from_strip(instance
, ld
, stripRow
, map
);
642 rowMod
= mega_mod64(row
, SPAN_ROW_SIZE(map
, ld
, span
));
643 armQ
= SPAN_ROW_SIZE(map
, ld
, span
) - 1 - rowMod
;
644 arm
= armQ
+ 1 + logArm
;
645 if (arm
>= SPAN_ROW_SIZE(map
, ld
, span
))
646 arm
-= SPAN_ROW_SIZE(map
, ld
, span
);
649 /* Calculate the arm */
650 physArm
= get_arm(instance
, ld
, span
, stripRow
, map
);
654 arRef
= MR_LdSpanArrayGet(ld
, span
, map
);
655 pd
= MR_ArPdGet(arRef
, physArm
, map
);
657 if (pd
!= MR_PD_INVALID
)
658 *pDevHandle
= MR_PdDevHandleGet(pd
, map
);
660 *pDevHandle
= MR_PD_INVALID
;
661 if ((raid
->level
>= 5) &&
662 (!do_invader
|| (do_invader
&&
663 (raid
->regTypeReqOnRead
!= REGION_TYPE_UNUSED
))))
664 pRAID_Context
->regLockFlags
= REGION_TYPE_EXCLUSIVE
;
665 else if (raid
->level
== 1) {
666 pd
= MR_ArPdGet(arRef
, physArm
+ 1, map
);
667 if (pd
!= MR_PD_INVALID
)
668 *pDevHandle
= MR_PdDevHandleGet(pd
, map
);
672 *pdBlock
+= stripRef
+ MR_LdSpanPtrGet(ld
, span
, map
)->startBlk
;
673 pRAID_Context
->spanArm
= (span
<< RAID_CTX_SPANARM_SPAN_SHIFT
) |
679 ******************************************************************************
681 * This routine calculates the arm, span and block for the specified stripe and
682 * reference in stripe.
686 * ld - Logical drive number
687 * stripRow - Stripe number
688 * stripRef - Reference in stripe
693 * block - Absolute Block number in the physical disk
695 u8
MR_GetPhyParams(struct megasas_instance
*instance
, u32 ld
, u64 stripRow
,
696 u16 stripRef
, struct IO_REQUEST_INFO
*io_info
,
697 struct RAID_CONTEXT
*pRAID_Context
,
698 struct MR_FW_RAID_MAP_ALL
*map
)
700 struct MR_LD_RAID
*raid
= MR_LdRaidGet(ld
, map
);
706 u64
*pdBlock
= &io_info
->pdBlock
;
707 u16
*pDevHandle
= &io_info
->devHandle
;
709 if ((instance
->pdev
->device
== PCI_DEVICE_ID_LSI_INVADER
||
710 instance
->pdev
->device
== PCI_DEVICE_ID_LSI_FURY
))
713 row
= mega_div64_32(stripRow
, raid
->rowDataSize
);
715 if (raid
->level
== 6) {
716 /* logical arm within row */
717 u32 logArm
= mega_mod64(stripRow
, raid
->rowDataSize
);
718 u32 rowMod
, armQ
, arm
;
720 if (raid
->rowSize
== 0)
722 /* get logical row mod */
723 rowMod
= mega_mod64(row
, raid
->rowSize
);
724 armQ
= raid
->rowSize
-1-rowMod
; /* index of Q drive */
725 arm
= armQ
+1+logArm
; /* data always logically follows Q */
726 if (arm
>= raid
->rowSize
) /* handle wrap condition */
727 arm
-= raid
->rowSize
;
730 if (raid
->modFactor
== 0)
732 physArm
= MR_LdDataArmGet(ld
, mega_mod64(stripRow
,
737 if (raid
->spanDepth
== 1) {
739 *pdBlock
= row
<< raid
->stripeShift
;
741 span
= (u8
)MR_GetSpanBlock(ld
, row
, pdBlock
, map
);
742 if (span
== SPAN_INVALID
)
746 /* Get the array on which this span is present */
747 arRef
= MR_LdSpanArrayGet(ld
, span
, map
);
748 pd
= MR_ArPdGet(arRef
, physArm
, map
); /* Get the pd */
750 if (pd
!= MR_PD_INVALID
)
751 /* Get dev handle from Pd. */
752 *pDevHandle
= MR_PdDevHandleGet(pd
, map
);
754 *pDevHandle
= MR_PD_INVALID
; /* set dev handle as invalid. */
755 if ((raid
->level
>= 5) &&
756 (!do_invader
|| (do_invader
&&
757 (raid
->regTypeReqOnRead
!= REGION_TYPE_UNUSED
))))
758 pRAID_Context
->regLockFlags
= REGION_TYPE_EXCLUSIVE
;
759 else if (raid
->level
== 1) {
760 /* Get alternate Pd. */
761 pd
= MR_ArPdGet(arRef
, physArm
+ 1, map
);
762 if (pd
!= MR_PD_INVALID
)
763 /* Get dev handle from Pd */
764 *pDevHandle
= MR_PdDevHandleGet(pd
, map
);
768 *pdBlock
+= stripRef
+ MR_LdSpanPtrGet(ld
, span
, map
)->startBlk
;
769 pRAID_Context
->spanArm
= (span
<< RAID_CTX_SPANARM_SPAN_SHIFT
) |
775 ******************************************************************************
777 * MR_BuildRaidContext function
779 * This function will initiate command processing. The start/end row and strip
780 * information is calculated then the lock is acquired.
781 * This function will return 0 if region lock was acquired OR return num strips
784 MR_BuildRaidContext(struct megasas_instance
*instance
,
785 struct IO_REQUEST_INFO
*io_info
,
786 struct RAID_CONTEXT
*pRAID_Context
,
787 struct MR_FW_RAID_MAP_ALL
*map
)
789 struct MR_LD_RAID
*raid
;
790 u32 ld
, stripSize
, stripe_mask
;
791 u64 endLba
, endStrip
, endRow
, start_row
, start_strip
;
794 u8 num_strips
, numRows
;
795 u16 ref_in_start_stripe
, ref_in_end_stripe
;
797 u32 numBlocks
, ldTgtId
;
800 u8 startlba_span
= SPAN_INVALID
;
801 u64
*pdBlock
= &io_info
->pdBlock
;
803 ldStartBlock
= io_info
->ldStartBlock
;
804 numBlocks
= io_info
->numBlocks
;
805 ldTgtId
= io_info
->ldTgtId
;
806 isRead
= io_info
->isRead
;
807 io_info
->IoforUnevenSpan
= 0;
808 io_info
->start_span
= SPAN_INVALID
;
810 ld
= MR_TargetIdToLdGet(ldTgtId
, map
);
811 raid
= MR_LdRaidGet(ld
, map
);
814 * if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero
817 if (raid
->rowDataSize
== 0) {
818 if (MR_LdSpanPtrGet(ld
, 0, map
)->spanRowDataSize
== 0)
820 else if (instance
->UnevenSpanSupport
) {
821 io_info
->IoforUnevenSpan
= 1;
823 dev_info(&instance
->pdev
->dev
,
824 "raid->rowDataSize is 0, but has SPAN[0]"
825 "rowDataSize = 0x%0x,"
826 "but there is _NO_ UnevenSpanSupport\n",
827 MR_LdSpanPtrGet(ld
, 0, map
)->spanRowDataSize
);
832 stripSize
= 1 << raid
->stripeShift
;
833 stripe_mask
= stripSize
-1;
837 * calculate starting row and stripe, and number of strips and rows
839 start_strip
= ldStartBlock
>> raid
->stripeShift
;
840 ref_in_start_stripe
= (u16
)(ldStartBlock
& stripe_mask
);
841 endLba
= ldStartBlock
+ numBlocks
- 1;
842 ref_in_end_stripe
= (u16
)(endLba
& stripe_mask
);
843 endStrip
= endLba
>> raid
->stripeShift
;
844 num_strips
= (u8
)(endStrip
- start_strip
+ 1); /* End strip */
846 if (io_info
->IoforUnevenSpan
) {
847 start_row
= get_row_from_strip(instance
, ld
, start_strip
, map
);
848 endRow
= get_row_from_strip(instance
, ld
, endStrip
, map
);
849 if (start_row
== -1ULL || endRow
== -1ULL) {
850 dev_info(&instance
->pdev
->dev
, "return from %s %d."
851 "Send IO w/o region lock.\n",
856 if (raid
->spanDepth
== 1) {
858 *pdBlock
= start_row
<< raid
->stripeShift
;
860 startlba_span
= (u8
)mr_spanset_get_span_block(instance
,
861 ld
, start_row
, pdBlock
, map
);
862 if (startlba_span
== SPAN_INVALID
) {
863 dev_info(&instance
->pdev
->dev
, "return from %s %d"
864 "for row 0x%llx,start strip %llx"
865 "endSrip %llx\n", __func__
, __LINE__
,
866 (unsigned long long)start_row
,
867 (unsigned long long)start_strip
,
868 (unsigned long long)endStrip
);
871 io_info
->start_span
= startlba_span
;
872 io_info
->start_row
= start_row
;
874 dev_dbg(&instance
->pdev
->dev
, "Check Span number from %s %d"
875 "for row 0x%llx, start strip 0x%llx end strip 0x%llx"
876 " span 0x%x\n", __func__
, __LINE__
,
877 (unsigned long long)start_row
,
878 (unsigned long long)start_strip
,
879 (unsigned long long)endStrip
, startlba_span
);
880 dev_dbg(&instance
->pdev
->dev
, "start_row 0x%llx endRow 0x%llx"
881 "Start span 0x%x\n", (unsigned long long)start_row
,
882 (unsigned long long)endRow
, startlba_span
);
885 start_row
= mega_div64_32(start_strip
, raid
->rowDataSize
);
886 endRow
= mega_div64_32(endStrip
, raid
->rowDataSize
);
888 numRows
= (u8
)(endRow
- start_row
+ 1);
891 * calculate region info.
894 /* assume region is at the start of the first row */
895 regStart
= start_row
<< raid
->stripeShift
;
896 /* assume this IO needs the full row - we'll adjust if not true */
899 /* Check if we can send this I/O via FastPath */
900 if (raid
->capability
.fpCapable
) {
902 io_info
->fpOkForIo
= (raid
->capability
.fpReadCapable
&&
903 ((num_strips
== 1) ||
905 fpReadAcrossStripe
));
907 io_info
->fpOkForIo
= (raid
->capability
.fpWriteCapable
&&
908 ((num_strips
== 1) ||
910 fpWriteAcrossStripe
));
912 io_info
->fpOkForIo
= FALSE
;
915 /* single-strip IOs can always lock only the data needed */
916 if (num_strips
== 1) {
917 regStart
+= ref_in_start_stripe
;
920 /* multi-strip IOs always need to full stripe locked */
921 } else if (io_info
->IoforUnevenSpan
== 0) {
923 * For Even span region lock optimization.
924 * If the start strip is the last in the start row
926 if (start_strip
== (start_row
+ 1) * raid
->rowDataSize
- 1) {
927 regStart
+= ref_in_start_stripe
;
928 /* initialize count to sectors from startref to end
930 regSize
= stripSize
- ref_in_start_stripe
;
933 /* add complete rows in the middle of the transfer */
935 regSize
+= (numRows
-2) << raid
->stripeShift
;
937 /* if IO ends within first strip of last row*/
938 if (endStrip
== endRow
*raid
->rowDataSize
)
939 regSize
+= ref_in_end_stripe
+1;
941 regSize
+= stripSize
;
944 * For Uneven span region lock optimization.
945 * If the start strip is the last in the start row
947 if (start_strip
== (get_strip_from_row(instance
, ld
, start_row
, map
) +
948 SPAN_ROW_DATA_SIZE(map
, ld
, startlba_span
) - 1)) {
949 regStart
+= ref_in_start_stripe
;
950 /* initialize count to sectors from
951 * startRef to end of strip
953 regSize
= stripSize
- ref_in_start_stripe
;
955 /* Add complete rows in the middle of the transfer*/
958 /* Add complete rows in the middle of the transfer*/
959 regSize
+= (numRows
-2) << raid
->stripeShift
;
961 /* if IO ends within first strip of last row */
962 if (endStrip
== get_strip_from_row(instance
, ld
, endRow
, map
))
963 regSize
+= ref_in_end_stripe
+ 1;
965 regSize
+= stripSize
;
968 pRAID_Context
->timeoutValue
= map
->raidMap
.fpPdIoTimeoutSec
;
969 if ((instance
->pdev
->device
== PCI_DEVICE_ID_LSI_INVADER
) ||
970 (instance
->pdev
->device
== PCI_DEVICE_ID_LSI_FURY
))
971 pRAID_Context
->regLockFlags
= (isRead
) ?
972 raid
->regTypeReqOnRead
: raid
->regTypeReqOnWrite
;
974 pRAID_Context
->regLockFlags
= (isRead
) ?
975 REGION_TYPE_SHARED_READ
: raid
->regTypeReqOnWrite
;
976 pRAID_Context
->VirtualDiskTgtId
= raid
->targetId
;
977 pRAID_Context
->regLockRowLBA
= regStart
;
978 pRAID_Context
->regLockLength
= regSize
;
979 pRAID_Context
->configSeqNum
= raid
->seqNum
;
981 /*Get Phy Params only if FP capable, or else leave it to MR firmware
982 to do the calculation.*/
983 if (io_info
->fpOkForIo
) {
984 retval
= io_info
->IoforUnevenSpan
?
985 mr_spanset_get_phy_params(instance
, ld
,
986 start_strip
, ref_in_start_stripe
,
987 io_info
, pRAID_Context
, map
) :
988 MR_GetPhyParams(instance
, ld
, start_strip
,
989 ref_in_start_stripe
, io_info
,
991 /* If IO on an invalid Pd, then FP is not possible.*/
992 if (io_info
->devHandle
== MR_PD_INVALID
)
993 io_info
->fpOkForIo
= FALSE
;
997 for (stripIdx
= 0; stripIdx
< num_strips
; stripIdx
++) {
998 retval
= io_info
->IoforUnevenSpan
?
999 mr_spanset_get_phy_params(instance
, ld
,
1000 start_strip
+ stripIdx
,
1001 ref_in_start_stripe
, io_info
,
1002 pRAID_Context
, map
) :
1003 MR_GetPhyParams(instance
, ld
,
1004 start_strip
+ stripIdx
, ref_in_start_stripe
,
1005 io_info
, pRAID_Context
, map
);
1012 /* Just for testing what arm we get for strip.*/
1013 if (io_info
->IoforUnevenSpan
)
1014 get_arm_from_strip(instance
, ld
, start_strip
, map
);
1020 ******************************************************************************
1022 * This routine pepare spanset info from Valid Raid map and store it into
1023 * local copy of ldSpanInfo per instance data structure.
1027 * ldSpanInfo - ldSpanInfo per HBA instance
1030 void mr_update_span_set(struct MR_FW_RAID_MAP_ALL
*map
,
1031 PLD_SPAN_INFO ldSpanInfo
)
1034 u32 element
, span_row_width
;
1036 struct MR_LD_RAID
*raid
;
1037 LD_SPAN_SET
*span_set
, *span_set_prev
;
1038 struct MR_QUAD_ELEMENT
*quad
;
1043 for (ldCount
= 0; ldCount
< MAX_LOGICAL_DRIVES
; ldCount
++) {
1044 ld
= MR_TargetIdToLdGet(ldCount
, map
);
1045 if (ld
>= MAX_LOGICAL_DRIVES
)
1047 raid
= MR_LdRaidGet(ld
, map
);
1048 for (element
= 0; element
< MAX_QUAD_DEPTH
; element
++) {
1049 for (span
= 0; span
< raid
->spanDepth
; span
++) {
1050 if (map
->raidMap
.ldSpanMap
[ld
].spanBlock
[span
].
1051 block_span_info
.noElements
<
1054 span_set
= &(ldSpanInfo
[ld
].span_set
[element
]);
1055 quad
= &map
->raidMap
.ldSpanMap
[ld
].
1056 spanBlock
[span
].block_span_info
.
1059 span_set
->diff
= quad
->diff
;
1061 for (count
= 0, span_row_width
= 0;
1062 count
< raid
->spanDepth
; count
++) {
1063 if (map
->raidMap
.ldSpanMap
[ld
].
1066 noElements
>= element
+ 1) {
1067 span_set
->strip_offset
[count
] =
1071 (ld
, count
, map
)->spanRowDataSize
;
1072 printk(KERN_INFO
"megasas:"
1073 "span %x rowDataSize %x\n",
1074 count
, MR_LdSpanPtrGet
1075 (ld
, count
, map
)->spanRowDataSize
);
1079 span_set
->span_row_data_width
= span_row_width
;
1080 span_row
= mega_div64_32(((quad
->logEnd
-
1081 quad
->logStart
) + quad
->diff
),
1085 span_set
->log_start_lba
= 0;
1086 span_set
->log_end_lba
=
1087 ((span_row
<< raid
->stripeShift
)
1088 * span_row_width
) - 1;
1090 span_set
->span_row_start
= 0;
1091 span_set
->span_row_end
= span_row
- 1;
1093 span_set
->data_strip_start
= 0;
1094 span_set
->data_strip_end
=
1095 (span_row
* span_row_width
) - 1;
1097 span_set
->data_row_start
= 0;
1098 span_set
->data_row_end
=
1099 (span_row
* quad
->diff
) - 1;
1101 span_set_prev
= &(ldSpanInfo
[ld
].
1102 span_set
[element
- 1]);
1103 span_set
->log_start_lba
=
1104 span_set_prev
->log_end_lba
+ 1;
1105 span_set
->log_end_lba
=
1106 span_set
->log_start_lba
+
1107 ((span_row
<< raid
->stripeShift
)
1108 * span_row_width
) - 1;
1110 span_set
->span_row_start
=
1111 span_set_prev
->span_row_end
+ 1;
1112 span_set
->span_row_end
=
1113 span_set
->span_row_start
+ span_row
- 1;
1115 span_set
->data_strip_start
=
1116 span_set_prev
->data_strip_end
+ 1;
1117 span_set
->data_strip_end
=
1118 span_set
->data_strip_start
+
1119 (span_row
* span_row_width
) - 1;
1121 span_set
->data_row_start
=
1122 span_set_prev
->data_row_end
+ 1;
1123 span_set
->data_row_end
=
1124 span_set
->data_row_start
+
1125 (span_row
* quad
->diff
) - 1;
1129 if (span
== raid
->spanDepth
)
1134 getSpanInfo(map
, ldSpanInfo
);
1140 mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL
*map
,
1141 struct LD_LOAD_BALANCE_INFO
*lbInfo
)
1145 struct MR_LD_RAID
*raid
;
1147 for (ldCount
= 0; ldCount
< MAX_LOGICAL_DRIVES
; ldCount
++) {
1148 ld
= MR_TargetIdToLdGet(ldCount
, map
);
1149 if (ld
>= MAX_LOGICAL_DRIVES
) {
1150 lbInfo
[ldCount
].loadBalanceFlag
= 0;
1154 raid
= MR_LdRaidGet(ld
, map
);
1156 /* Two drive Optimal RAID 1 */
1157 if ((raid
->level
== 1) && (raid
->rowSize
== 2) &&
1158 (raid
->spanDepth
== 1) && raid
->ldState
==
1159 MR_LD_STATE_OPTIMAL
) {
1162 lbInfo
[ldCount
].loadBalanceFlag
= 1;
1164 /* Get the array on which this span is present */
1165 arRef
= MR_LdSpanArrayGet(ld
, 0, map
);
1168 pd
= MR_ArPdGet(arRef
, 0, map
);
1169 /* Get dev handle from Pd */
1170 lbInfo
[ldCount
].raid1DevHandle
[0] =
1171 MR_PdDevHandleGet(pd
, map
);
1173 pd
= MR_ArPdGet(arRef
, 1, map
);
1175 /* Get the dev handle from Pd */
1176 lbInfo
[ldCount
].raid1DevHandle
[1] =
1177 MR_PdDevHandleGet(pd
, map
);
1179 lbInfo
[ldCount
].loadBalanceFlag
= 0;
1183 u8
megasas_get_best_arm(struct LD_LOAD_BALANCE_INFO
*lbInfo
, u8 arm
, u64 block
,
1190 /* get the pending cmds for the data and mirror arms */
1191 pend0
= atomic_read(&lbInfo
->scsi_pending_cmds
[0]);
1192 pend1
= atomic_read(&lbInfo
->scsi_pending_cmds
[1]);
1194 /* Determine the disk whose head is nearer to the req. block */
1195 diff0
= ABS_DIFF(block
, lbInfo
->last_accessed_block
[0]);
1196 diff1
= ABS_DIFF(block
, lbInfo
->last_accessed_block
[1]);
1197 bestArm
= (diff0
<= diff1
? 0 : 1);
1199 /*Make balance count from 16 to 4 to keep driver in sync with Firmware*/
1200 if ((bestArm
== arm
&& pend0
> pend1
+ 4) ||
1201 (bestArm
!= arm
&& pend1
> pend0
+ 4))
1204 /* Update the last accessed block on the correct pd */
1205 lbInfo
->last_accessed_block
[bestArm
] = block
+ count
- 1;
1210 u16
get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO
*lbInfo
,
1211 struct IO_REQUEST_INFO
*io_info
)
1216 old_arm
= lbInfo
->raid1DevHandle
[0] == io_info
->devHandle
? 0 : 1;
1218 /* get best new arm */
1219 arm
= megasas_get_best_arm(lbInfo
, old_arm
, io_info
->ldStartBlock
,
1220 io_info
->numBlocks
);
1221 devHandle
= lbInfo
->raid1DevHandle
[arm
];
1222 atomic_inc(&lbInfo
->scsi_pending_cmds
[arm
]);