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cciss: Inform controller we are using 32-bit tags. 

Controller will DMA only 32-bits of the tag per command
on completion if it knows we are only using 32-bit tags.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Stephen M. Cameron 2011-03-12 10:02:16 +01:00 committed by Jens Axboe
parent 4a76504655
commit 0498cc2a9e
2 changed files with 16 additions and 10 deletions
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25
drivers/block/cciss.c
View File

@ -231,7 +231,7 @@ static const struct block_device_operations cciss_fops = {
*/
static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
{
if (likely(h->transMethod == CFGTBL_Trans_Performant))
if (likely(h->transMethod & CFGTBL_Trans_Performant))
c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
}
@ -3175,10 +3175,13 @@ static inline u32 cciss_tag_to_index(u32 tag)
return tag >> DIRECT_LOOKUP_SHIFT;
}
static inline u32 cciss_tag_discard_error_bits(u32 tag)
static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag)
{
#define CCISS_ERROR_BITS 0x03
return tag & ~CCISS_ERROR_BITS;
#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
#define CCISS_SIMPLE_ERROR_BITS 0x03
if (likely(h->transMethod & CFGTBL_Trans_Performant))
return tag & ~CCISS_PERF_ERROR_BITS;
return tag & ~CCISS_SIMPLE_ERROR_BITS;
}
static inline void cciss_mark_tag_indexed(u32 *tag)
@ -3398,7 +3401,7 @@ static inline u32 next_command(ctlr_info_t *h)
{
u32 a;
if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
return h->access.command_completed(h);
if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
@ -3436,9 +3439,9 @@ static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
CommandList_struct *c = NULL;
__u32 busaddr_masked, tag_masked;
tag_masked = cciss_tag_discard_error_bits(raw_tag);
tag_masked = cciss_tag_discard_error_bits(h, raw_tag);
list_for_each_entry(c, &h->cmpQ, list) {
busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr);
if (busaddr_masked == tag_masked) {
finish_cmd(h, c, raw_tag);
return next_command(h);
@ -3790,7 +3793,8 @@ static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
}
}
static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
static __devinit void cciss_enter_performant_mode(ctlr_info_t *h,
u32 use_short_tags)
{
/* This is a bit complicated. There are 8 registers on
* the controller which we write to to tell it 8 different
@ -3845,7 +3849,7 @@ static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
writel(0, &h->transtable->RepQCtrAddrHigh32);
writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
writel(0, &h->transtable->RepQAddr0High32);
writel(CFGTBL_Trans_Performant,
writel(CFGTBL_Trans_Performant | use_short_tags,
&(h->cfgtable->HostWrite.TransportRequest));
writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
@ -3892,7 +3896,8 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
goto clean_up;
cciss_enter_performant_mode(h);
cciss_enter_performant_mode(h,
trans_support & CFGTBL_Trans_use_short_tags);
/* Change the access methods to the performant access methods */
h->access = SA5_performant_access;

1
drivers/block/cciss_cmd.h
View File

@ -56,6 +56,7 @@
#define CFGTBL_Trans_Simple 0x00000002l
#define CFGTBL_Trans_Performant 0x00000004l
#define CFGTBL_Trans_use_short_tags 0x20000000l
#define CFGTBL_BusType_Ultra2 0x00000001l
#define CFGTBL_BusType_Ultra3 0x00000002l