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path: root/drivers/block/cciss_scsi.c
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Diffstat (limited to 'drivers/block/cciss_scsi.c')
-rw-r--r--drivers/block/cciss_scsi.c41
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index df793803f5ae..696100241a6f 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -84,7 +84,6 @@ static struct scsi_host_template cciss_driver_template = {
.proc_name = "cciss",
.proc_info = cciss_scsi_proc_info,
.queuecommand = cciss_scsi_queue_command,
- .can_queue = SCSI_CCISS_CAN_QUEUE,
.this_id = 7,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
@@ -108,16 +107,13 @@ struct cciss_scsi_cmd_stack_elem_t {
#pragma pack()
-#define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
- CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
- // plus two for init time usage
-
#pragma pack(1)
struct cciss_scsi_cmd_stack_t {
struct cciss_scsi_cmd_stack_elem_t *pool;
- struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE];
+ struct cciss_scsi_cmd_stack_elem_t **elem;
dma_addr_t cmd_pool_handle;
int top;
+ int nelems;
};
#pragma pack()
@@ -191,7 +187,7 @@ scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
sa = h->scsi_ctlr;
stk = &sa->cmd_stack;
stk->top++;
- if (stk->top >= CMD_STACK_SIZE) {
+ if (stk->top >= stk->nelems) {
dev_err(&h->pdev->dev,
"scsi_cmd_free called too many times.\n");
BUG();
@@ -206,13 +202,14 @@ scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
struct cciss_scsi_cmd_stack_t *stk;
size_t size;
+ stk = &sa->cmd_stack;
+ stk->nelems = cciss_tape_cmds + 2;
sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
- h->chainsize, CMD_STACK_SIZE);
+ h->chainsize, stk->nelems);
if (!sa->cmd_sg_list && h->chainsize > 0)
return -ENOMEM;
- stk = &sa->cmd_stack;
- size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
+ size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
/* Check alignment, see cciss_cmd.h near CommandList_struct def. */
BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
@@ -221,18 +218,23 @@ scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
if (stk->pool == NULL) {
- cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
+ cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
sa->cmd_sg_list = NULL;
return -ENOMEM;
}
-
- for (i=0; i<CMD_STACK_SIZE; i++) {
+ stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL);
+ if (!stk->elem) {
+ pci_free_consistent(h->pdev, size, stk->pool,
+ stk->cmd_pool_handle);
+ return -1;
+ }
+ for (i = 0; i < stk->nelems; i++) {
stk->elem[i] = &stk->pool[i];
stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle +
(sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
stk->elem[i]->cmdindex = i;
}
- stk->top = CMD_STACK_SIZE-1;
+ stk->top = stk->nelems-1;
return 0;
}
@@ -245,16 +247,18 @@ scsi_cmd_stack_free(ctlr_info_t *h)
sa = h->scsi_ctlr;
stk = &sa->cmd_stack;
- if (stk->top != CMD_STACK_SIZE-1) {
+ if (stk->top != stk->nelems-1) {
dev_warn(&h->pdev->dev,
"bug: %d scsi commands are still outstanding.\n",
- CMD_STACK_SIZE - stk->top);
+ stk->nelems - stk->top);
}
- size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
+ size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
stk->pool = NULL;
- cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
+ cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
+ kfree(stk->elem);
+ stk->elem = NULL;
}
#if 0
@@ -859,6 +863,7 @@ cciss_scsi_detect(ctlr_info_t *h)
sh->io_port = 0; // good enough? FIXME,
sh->n_io_port = 0; // I don't think we use these two...
sh->this_id = SELF_SCSI_ID;
+ sh->can_queue = cciss_tape_cmds;
sh->sg_tablesize = h->maxsgentries;
sh->max_cmd_len = MAX_COMMAND_SIZE;