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From: Stephen M. Cameron on 19 Jul 2010 14:50
From: Stephen M. Cameron <scameron(a)beardog.cce.hp.com>

cciss: factor out cciss_wait_for_board_ready()

Signed-off-by: Stephen M. Cameron <scameron(a)beardog.cce.hp.com>
---
drivers/block/cciss.c | 32 +++++++++++++++++---------------
drivers/block/cciss.h | 15 +++++++++++++++
2 files changed, 32 insertions(+), 15 deletions(-)

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9c9c79c..286c81d 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4026,9 +4026,23 @@ static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
return -ENODEV;
}

+static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
+{
+ int i;
+ u32 scratchpad;
+
+ for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) {
+ scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
+ if (scratchpad == CCISS_FIRMWARE_READY)
+ return 0;
+ msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
+ }
+ dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
+ return -ENODEV;
+}
+
static int __devinit cciss_pci_init(ctlr_info_t *c)
{
- __u32 scratchpad = 0;
__u64 cfg_offset;
__u32 cfg_base_addr;
__u64 cfg_base_addr_index;
@@ -4073,21 +4087,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
if (err)
goto err_out_free_res;
c->vaddr = remap_pci_mem(c->paddr, 0x250);
-
- /* Wait for the board to become ready. (PCI hotplug needs this.)
- * We poll for up to 120 secs, once per 100ms. */
- for (i = 0; i < 1200; i++) {
- scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
- if (scratchpad == CCISS_FIRMWARE_READY)
- break;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
- }
- if (scratchpad != CCISS_FIRMWARE_READY) {
- printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
- err = -ENODEV;
+ err = cciss_wait_for_board_ready(c);
+ if (err)
goto err_out_free_res;
- }

/* get the address index number */
cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 8a9f5b5..c2ef9dd 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -190,6 +190,21 @@ struct ctlr_info

#define CCISS_INTR_ON 1
#define CCISS_INTR_OFF 0
+
+
+/* CCISS_BOARD_READY_WAIT_SECS is how long to wait for a board
+ * to become ready, in seconds, before giving up on it.
+ * CCISS_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
+ * between polling the board to see if it is ready, in
+ * milliseconds. CCISS_BOARD_READY_ITERATIONS is derived
+ * the above.
+ */
+#define CCISS_BOARD_READY_WAIT_SECS (120)
+#define CCISS_BOARD_READY_POLL_INTERVAL_MSECS (100)
+#define CCISS_BOARD_READY_ITERATIONS \
+ ((CCISS_BOARD_READY_WAIT_SECS * 1000) / \
+ CCISS_BOARD_READY_POLL_INTERVAL_MSECS)
+
/*
Send the command to the hardware
*/

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