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hpsa: add ioaccel sg chaining for the ioaccel2 path 

Increase the request size for ioaccel2 path.

The error, if any, returned by hpsa_allocate_ioaccel2_sg_chain_blocks
to hpsa_alloc_ioaccel2_cmd_and_bft should be returned upstream rather
than assumed to be -ENOMEM.

This differs slightly from hpsa_alloc_ioaccel1_cmd_and_bft,
which does not call another hpsa_allocate function and only
has -ENOMEM to return from some kmalloc calls.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Webb Scales 2015-04-23 09:33:27 -05:00 committed by James Bottomley
parent 1fb7c98aa4
commit d9a729f3e4
2 changed files with 116 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

125
drivers/scsi/hpsa.c
View File

@ -1699,6 +1699,46 @@ static void hpsa_slave_destroy(struct scsi_device *sdev)
/* nothing to do. */
}
static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
int i;
if (!h->ioaccel2_cmd_sg_list)
return;
for (i = 0; i < h->nr_cmds; i++) {
kfree(h->ioaccel2_cmd_sg_list[i]);
h->ioaccel2_cmd_sg_list[i] = NULL;
}
kfree(h->ioaccel2_cmd_sg_list);
h->ioaccel2_cmd_sg_list = NULL;
}
static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
int i;
if (h->chainsize <= 0)
return 0;
h->ioaccel2_cmd_sg_list =
kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
GFP_KERNEL);
if (!h->ioaccel2_cmd_sg_list)
return -ENOMEM;
for (i = 0; i < h->nr_cmds; i++) {
h->ioaccel2_cmd_sg_list[i] =
kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
h->maxsgentries, GFP_KERNEL);
if (!h->ioaccel2_cmd_sg_list[i])
goto clean;
}
return 0;
clean:
hpsa_free_ioaccel2_sg_chain_blocks(h);
return -ENOMEM;
}
static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
{
int i;
@ -1741,6 +1781,39 @@ static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
return -ENOMEM;
}
static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
struct io_accel2_cmd *cp, struct CommandList *c)
{
struct ioaccel2_sg_element *chain_block;
u64 temp64;
u32 chain_size;
chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
chain_size = le32_to_cpu(cp->data_len);
temp64 = pci_map_single(h->pdev, chain_block, chain_size,
PCI_DMA_TODEVICE);
if (dma_mapping_error(&h->pdev->dev, temp64)) {
/* prevent subsequent unmapping */
cp->sg->address = 0;
return -1;
}
cp->sg->address = cpu_to_le64(temp64);
return 0;
}
static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
struct io_accel2_cmd *cp)
{
struct ioaccel2_sg_element *chain_sg;
u64 temp64;
u32 chain_size;
chain_sg = cp->sg;
temp64 = le64_to_cpu(chain_sg->address);
chain_size = le32_to_cpu(cp->data_len);
pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
struct CommandList *c)
{
@ -1950,6 +2023,7 @@ static void complete_scsi_command(struct CommandList *cp)
struct ctlr_info *h;
struct ErrorInfo *ei;
struct hpsa_scsi_dev_t *dev;
struct io_accel2_cmd *c2;
u8 sense_key;
u8 asc; /* additional sense code */
@ -1960,12 +2034,17 @@ static void complete_scsi_command(struct CommandList *cp)
cmd = cp->scsi_cmd;
h = cp->h;
dev = cmd->device->hostdata;
c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
scsi_dma_unmap(cmd); /* undo the DMA mappings */
if ((cp->cmd_type == CMD_SCSI) &&
(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
hpsa_unmap_sg_chain_block(h, cp);
if ((cp->cmd_type == CMD_IOACCEL2) &&
(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
@ -3809,10 +3888,7 @@ static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
u32 len;
u32 total_len = 0;
if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
atomic_dec(&phys_disk->ioaccel_cmds_out);
return IO_ACCEL_INELIGIBLE;
}
BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
atomic_dec(&phys_disk->ioaccel_cmds_out);
@ -3835,8 +3911,19 @@ static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
}
if (use_sg) {
BUG_ON(use_sg > IOACCEL2_MAXSGENTRIES);
curr_sg = cp->sg;
if (use_sg > h->ioaccel_maxsg) {
addr64 = le64_to_cpu(
h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
curr_sg->address = cpu_to_le64(addr64);
curr_sg->length = 0;
curr_sg->reserved[0] = 0;
curr_sg->reserved[1] = 0;
curr_sg->reserved[2] = 0;
curr_sg->chain_indicator = 0x80;
curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
}
scsi_for_each_sg(cmd, sg, use_sg, i) {
addr64 = (u64) sg_dma_address(sg);
len = sg_dma_len(sg);
@ -3881,14 +3968,22 @@ static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
memcpy(cp->cdb, cdb, sizeof(cp->cdb));
/* fill in sg elements */
cp->sg_count = (u8) use_sg;
cp->data_len = cpu_to_le32(total_len);
cp->err_ptr = cpu_to_le64(c->busaddr +
offsetof(struct io_accel2_cmd, error_data));
cp->err_len = cpu_to_le32(sizeof(cp->error_data));
/* fill in sg elements */
if (use_sg > h->ioaccel_maxsg) {
cp->sg_count = 1;
if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
atomic_dec(&phys_disk->ioaccel_cmds_out);
scsi_dma_unmap(cmd);
return -1;
}
} else
cp->sg_count = (u8) use_sg;
enqueue_cmd_and_start_io(h, c);
return 0;
}
@ -7892,6 +7987,8 @@ static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
/* Free ioaccel2 mode command blocks and block fetch table */
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
hpsa_free_ioaccel2_sg_chain_blocks(h);
if (h->ioaccel2_cmd_pool)
pci_free_consistent(h->pdev,
h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
@ -7903,6 +8000,8 @@ static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
/* Allocate ioaccel2 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
int rc;
/* Allocate ioaccel2 mode command blocks and block fetch table */
h->ioaccel_maxsg =
@ -7922,7 +8021,13 @@ static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
sizeof(u32)), GFP_KERNEL);
if ((h->ioaccel2_cmd_pool == NULL) ||
(h->ioaccel2_blockFetchTable == NULL))
(h->ioaccel2_blockFetchTable == NULL)) {
rc = -ENOMEM;
goto clean_up;
}
rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
if (rc)
goto clean_up;
memset(h->ioaccel2_cmd_pool, 0,
@ -7931,7 +8036,7 @@ static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
clean_up:
hpsa_free_ioaccel2_cmd_and_bft(h);
return 1;
return rc;
}
static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)

1
drivers/scsi/hpsa.h
View File

@ -162,6 +162,7 @@ struct ctlr_info {
u8 max_cmd_sg_entries;
int chainsize;
struct SGDescriptor **cmd_sg_list;
struct ioaccel2_sg_element **ioaccel2_cmd_sg_list;
/* pointers to command and error info pool */
struct CommandList *cmd_pool;