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-rw-r--r--drivers/block/cciss.c153
-rw-r--r--drivers/block/cciss_scsi.c10
2 files changed, 89 insertions, 74 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 70ad24f3604f..1dc95740b3bb 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -907,60 +907,73 @@ static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
/*
* For operations that cannot sleep, a command block is allocated at init,
* and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
- * which ones are free or in use. For operations that can wait for kmalloc
- * to possible sleep, this routine can be called with get_from_pool set to 0.
- * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
+ * which ones are free or in use.
*/
-static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
+static CommandList_struct *cmd_alloc(ctlr_info_t *h)
{
CommandList_struct *c;
int i;
u64bit temp64;
dma_addr_t cmd_dma_handle, err_dma_handle;
- if (!get_from_pool) {
- c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
- sizeof(CommandList_struct), &cmd_dma_handle);
- if (c == NULL)
+ do {
+ i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
+ if (i == h->nr_cmds)
return NULL;
- memset(c, 0, sizeof(CommandList_struct));
+ } while (test_and_set_bit(i & (BITS_PER_LONG - 1),
+ h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
+#ifdef CCISS_DEBUG
+ printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
+#endif
+ c = h->cmd_pool + i;
+ memset(c, 0, sizeof(CommandList_struct));
+ cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct);
+ c->err_info = h->errinfo_pool + i;
+ memset(c->err_info, 0, sizeof(ErrorInfo_struct));
+ err_dma_handle = h->errinfo_pool_dhandle
+ + i * sizeof(ErrorInfo_struct);
+ h->nr_allocs++;
- c->cmdindex = -1;
+ c->cmdindex = i;
- c->err_info = (ErrorInfo_struct *)
- pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
- &err_dma_handle);
+ INIT_HLIST_NODE(&c->list);
+ c->busaddr = (__u32) cmd_dma_handle;
+ temp64.val = (__u64) err_dma_handle;
+ c->ErrDesc.Addr.lower = temp64.val32.lower;
+ c->ErrDesc.Addr.upper = temp64.val32.upper;
+ c->ErrDesc.Len = sizeof(ErrorInfo_struct);
- if (c->err_info == NULL) {
- pci_free_consistent(h->pdev,
- sizeof(CommandList_struct), c, cmd_dma_handle);
- return NULL;
- }
- memset(c->err_info, 0, sizeof(ErrorInfo_struct));
- } else { /* get it out of the controllers pool */
-
- do {
- i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
- if (i == h->nr_cmds)
- return NULL;
- } while (test_and_set_bit
- (i & (BITS_PER_LONG - 1),
- h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
-#ifdef CCISS_DEBUG
- printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
-#endif
- c = h->cmd_pool + i;
- memset(c, 0, sizeof(CommandList_struct));
- cmd_dma_handle = h->cmd_pool_dhandle
- + i * sizeof(CommandList_struct);
- c->err_info = h->errinfo_pool + i;
- memset(c->err_info, 0, sizeof(ErrorInfo_struct));
- err_dma_handle = h->errinfo_pool_dhandle
- + i * sizeof(ErrorInfo_struct);
- h->nr_allocs++;
+ c->ctlr = h->ctlr;
+ return c;
+}
+
+/* allocate a command using pci_alloc_consistent, used for ioctls,
+ * etc., not for the main i/o path.
+ */
+static CommandList_struct *cmd_special_alloc(ctlr_info_t *h)
+{
+ CommandList_struct *c;
+ u64bit temp64;
+ dma_addr_t cmd_dma_handle, err_dma_handle;
+
+ c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
+ sizeof(CommandList_struct), &cmd_dma_handle);
+ if (c == NULL)
+ return NULL;
+ memset(c, 0, sizeof(CommandList_struct));
+
+ c->cmdindex = -1;
+
+ c->err_info = (ErrorInfo_struct *)
+ pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
+ &err_dma_handle);
- c->cmdindex = i;
+ if (c->err_info == NULL) {
+ pci_free_consistent(h->pdev,
+ sizeof(CommandList_struct), c, cmd_dma_handle);
+ return NULL;
}
+ memset(c->err_info, 0, sizeof(ErrorInfo_struct));
INIT_HLIST_NODE(&c->list);
c->busaddr = (__u32) cmd_dma_handle;
@@ -973,27 +986,26 @@ static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
return c;
}
-/*
- * Frees a command block that was previously allocated with cmd_alloc().
- */
-static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
+static void cmd_free(ctlr_info_t *h, CommandList_struct *c)
{
int i;
+
+ i = c - h->cmd_pool;
+ clear_bit(i & (BITS_PER_LONG - 1),
+ h->cmd_pool_bits + (i / BITS_PER_LONG));
+ h->nr_frees++;
+}
+
+static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c)
+{
u64bit temp64;
- if (!got_from_pool) {
- temp64.val32.lower = c->ErrDesc.Addr.lower;
- temp64.val32.upper = c->ErrDesc.Addr.upper;
- pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
- c->err_info, (dma_addr_t) temp64.val);
- pci_free_consistent(h->pdev, sizeof(CommandList_struct),
- c, (dma_addr_t) c->busaddr);
- } else {
- i = c - h->cmd_pool;
- clear_bit(i & (BITS_PER_LONG - 1),
- h->cmd_pool_bits + (i / BITS_PER_LONG));
- h->nr_frees++;
- }
+ temp64.val32.lower = c->ErrDesc.Addr.lower;
+ temp64.val32.upper = c->ErrDesc.Addr.upper;
+ pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
+ c->err_info, (dma_addr_t) temp64.val);
+ pci_free_consistent(h->pdev, sizeof(CommandList_struct),
+ c, (dma_addr_t) c->busaddr);
}
static inline ctlr_info_t *get_host(struct gendisk *disk)
@@ -1470,7 +1482,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
} else {
memset(buff, 0, iocommand.buf_size);
}
- c = cmd_alloc(h, 0);
+ c = cmd_special_alloc(h);
if (!c) {
kfree(buff);
return -ENOMEM;
@@ -1524,7 +1536,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
if (copy_to_user
(argp, &iocommand, sizeof(IOCTL_Command_struct))) {
kfree(buff);
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
return -EFAULT;
}
@@ -1533,12 +1545,12 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
if (copy_to_user
(iocommand.buf, buff, iocommand.buf_size)) {
kfree(buff);
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
return -EFAULT;
}
}
kfree(buff);
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
return 0;
}
case CCISS_BIG_PASSTHRU:{
@@ -1620,7 +1632,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
data_ptr += sz;
sg_used++;
}
- c = cmd_alloc(h, 0);
+ c = cmd_special_alloc(h);
if (!c) {
status = -ENOMEM;
goto cleanup1;
@@ -1668,7 +1680,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
/* Copy the error information out */
ioc->error_info = *(c->err_info);
if (copy_to_user(argp, ioc, sizeof(*ioc))) {
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
@@ -1678,14 +1690,14 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
for (i = 0; i < sg_used; i++) {
if (copy_to_user
(ptr, buff[i], buff_size[i])) {
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
ptr += buff_size[i];
}
}
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
status = 0;
cleanup1:
if (buff) {
@@ -1813,7 +1825,7 @@ static void cciss_softirq_done(struct request *rq)
blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
spin_lock_irqsave(&h->lock, flags);
- cmd_free(h, c, 1);
+ cmd_free(h, c);
cciss_check_queues(h);
spin_unlock_irqrestore(&h->lock, flags);
}
@@ -2765,7 +2777,7 @@ static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
CommandList_struct *c;
int return_status;
- c = cmd_alloc(h, 0);
+ c = cmd_special_alloc(h);
if (!c)
return -ENOMEM;
return_status = fill_cmd(h, c, cmd, buff, size, page_code,
@@ -2773,7 +2785,7 @@ static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
if (return_status == IO_OK)
return_status = sendcmd_withirq_core(h, c, 1);
- cmd_free(h, c, 0);
+ cmd_special_free(h, c);
return return_status;
}
@@ -3240,7 +3252,8 @@ static void do_cciss_request(struct request_queue *q)
BUG_ON(creq->nr_phys_segments > h->maxsgentries);
- if ((c = cmd_alloc(h, 1)) == NULL)
+ c = cmd_alloc(h);
+ if (!c)
goto full;
blk_start_request(creq);
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 9133ad4c7b1b..9fe0d8ffc90d 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -49,8 +49,10 @@ static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
__u8 page_code, unsigned char *scsi3addr,
int cmd_type);
-static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool);
-static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool);
+static CommandList_struct *cmd_alloc(ctlr_info_t *h);
+static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
+static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
+static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
static int cciss_scsi_proc_info(
struct Scsi_Host *sh,
@@ -1582,7 +1584,7 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
int waittime = HZ;
CommandList_struct *c;
- c = cmd_alloc(h, 1);
+ c = cmd_alloc(h);
if (!c) {
printk(KERN_WARNING "cciss%d: out of memory in "
"wait_for_device_to_become_ready.\n", h->ctlr);
@@ -1640,7 +1642,7 @@ retry_tur:
else
printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
- cmd_free(h, c, 1);
+ cmd_free(h, c);
return rc;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.