Prev: [PATCH 1/5] scsi: megaraid_sas - Add Online Controller Reset to MegaRAID SAS driver
Next: [PATCH 3/5] scsi: megaraid_sas - Add input parameter for max_sectors
From: bo yang on 11 Aug 2010 17:10
If fw didn't raise the interrupt with the fw state change to driver
and fw goes to failure state, driver
Will check the FW state in driver's timeout routine and issue the
reset if need. Driver will do the OCR upto three
Times until kill adapter. Also driver will issue OCR before driver
kill adapter even if fw in operational state.

Signed-off-by Bo Yang<bo.yang(a)lsi.com>

---
drivers/scsi/megaraid/megaraid_sas.c | 70 ++++++++++++++++++++++++++++++++++-
1 file changed, 69 insertions(+), 1 deletion(-)

diff -rupN old/drivers/scsi/megaraid/megaraid_sas.c
new/drivers/scsi/megaraid/megaraid_sas.c
--- old/drivers/scsi/megaraid/megaraid_sas.c 2010-08-10 04:37:53.000000000 -0400
+++ new/drivers/scsi/megaraid/megaraid_sas.c 2010-08-10 04:49:38.000000000 -0400
@@ -730,6 +730,10 @@ static int
megasas_check_reset_gen2(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
+ if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
+ return 1;
+ }
+
return 0;
}

@@ -942,6 +946,7 @@ megasas_make_sgl_skinny(struct megasas_i
mfi_sgl->sge_skinny[i].length = sg_dma_len(os_sgl);
mfi_sgl->sge_skinny[i].phys_addr =
sg_dma_address(os_sgl);
+ mfi_sgl->sge_skinny[i].flag = 0;
}
}
return sge_count;
@@ -1569,6 +1574,28 @@ static void megasas_complete_cmd_dpc(uns
}
}

+static void
+megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
+
+static void
+process_fw_state_change_wq(struct work_struct *work);
+
+void megasas_do_ocr(struct megasas_instance *instance)
+{
+ if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
+ (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
+ (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
+ *instance->consumer = MEGASAS_ADPRESET_INPROG_SIGN;
+ }
+ instance->instancet->disable_intr(instance->reg_set);
+ instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
+ instance->issuepend_done = 0;
+
+ atomic_set(&instance->fw_outstanding, 0);
+ megasas_internal_reset_defer_cmds(instance);
+ process_fw_state_change_wq(&instance->work_init);
+}
+
/**
* megasas_wait_for_outstanding - Wait for all outstanding cmds
* @instance: Adapter soft state
@@ -1586,6 +1613,8 @@ static int megasas_wait_for_outstanding(
unsigned long flags;
struct list_head clist_local;
struct megasas_cmd *reset_cmd;
+ u32 fw_state;
+ u8 kill_adapter_flag;

spin_lock_irqsave(&instance->hba_lock, flags);
adprecovery = instance->adprecovery;
@@ -1671,7 +1700,45 @@ static int megasas_wait_for_outstanding(
msleep(1000);
}

- if (atomic_read(&instance->fw_outstanding)) {
+ i = 0;
+ kill_adapter_flag = 0;
+ do {
+ fw_state = instance->instancet->read_fw_status_reg(
+ instance->reg_set) & MFI_STATE_MASK;
+ if ((fw_state == MFI_STATE_FAULT) &&
+ (instance->disableOnlineCtrlReset == 0)) {
+ if (i == 3) {
+ kill_adapter_flag = 2;
+ break;
+ }
+ megasas_do_ocr(instance);
+ kill_adapter_flag = 1;
+
+ /* wait for 1 secs to let FW finish the pending cmds */
+ msleep(1000);
+ }
+ i++;
+ } while (i <= 3);
+
+ if (atomic_read(&instance->fw_outstanding) &&
+ !kill_adapter_flag) {
+ if (instance->disableOnlineCtrlReset == 0) {
+
+ megasas_do_ocr(instance);
+
+ /* wait for 5 secs to let FW finish the pending cmds */
+ for (i = 0; i < wait_time; i++) {
+ int outstanding =
+ atomic_read(&instance->fw_outstanding);
+ if (!outstanding)
+ return SUCCESS;
+ msleep(1000);
+ }
+ }
+ }
+
+ if (atomic_read(&instance->fw_outstanding) ||
+ (kill_adapter_flag == 2)) {
printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
/*
* Send signal to FW to stop processing any pending cmds.
@@ -2681,6 +2748,7 @@ static int megasas_create_frame_pool(str
return -ENOMEM;
}

+ memset(cmd->frame, 0, total_sz);
cmd->frame->io.context = cmd->index;
cmd->frame->io.pad_0 = 0;
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH 1/5] scsi: megaraid_sas - Add Online Controller Reset to MegaRAID SAS driver
Next: [PATCH 3/5] scsi: megaraid_sas - Add input parameter for max_sectors