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authorsumit.saxena@avagotech.com <sumit.saxena@avagotech.com>2015-08-31 17:23:41 +0530
committerMartin K. Petersen <martin.petersen@oracle.com>2015-10-29 00:26:20 -0400
commit79b82c2c560025afbb88ba7ad5cddb9c2203cf2e (patch)
tree5bfff566b865855df79b48138aa23d8ad3d20136 /drivers
parentbd5f9484262a13397a0725f4a43f7baaa3341125 (diff)
downloadblackbird-op-linux-79b82c2c560025afbb88ba7ad5cddb9c2203cf2e.tar.gz
blackbird-op-linux-79b82c2c560025afbb88ba7ad5cddb9c2203cf2e.zip
megaraid_sas: Chip reset if driver fails to get IOC ready
Fix the issue reported at: http://marc.info/?l=linux-scsi&m=143694494104544&w=2 Try to do chip reset at driver load time. If firmware fails to reach ready state, try chip reset using adp_reset() callback. For Fusion adapters the call back was previously void. Provide a suitable reset function. Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas_fusion.c143
1 files changed, 68 insertions, 75 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 78e252acea7a..8d0a88f092c2 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -2509,6 +2509,70 @@ static int
megasas_adp_reset_fusion(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
+ u32 host_diag, abs_state, retry;
+
+ /* Now try to reset the chip */
+ writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+ writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset);
+
+ /* Check that the diag write enable (DRWE) bit is on */
+ host_diag = readl(&instance->reg_set->fusion_host_diag);
+ retry = 0;
+ while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
+ msleep(100);
+ host_diag = readl(&instance->reg_set->fusion_host_diag);
+ if (retry++ == 100) {
+ dev_warn(&instance->pdev->dev,
+ "Host diag unlock failed from %s %d\n",
+ __func__, __LINE__);
+ break;
+ }
+ }
+ if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
+ return -1;
+
+ /* Send chip reset command */
+ writel(host_diag | HOST_DIAG_RESET_ADAPTER,
+ &instance->reg_set->fusion_host_diag);
+ msleep(3000);
+
+ /* Make sure reset adapter bit is cleared */
+ host_diag = readl(&instance->reg_set->fusion_host_diag);
+ retry = 0;
+ while (host_diag & HOST_DIAG_RESET_ADAPTER) {
+ msleep(100);
+ host_diag = readl(&instance->reg_set->fusion_host_diag);
+ if (retry++ == 1000) {
+ dev_warn(&instance->pdev->dev,
+ "Diag reset adapter never cleared %s %d\n",
+ __func__, __LINE__);
+ break;
+ }
+ }
+ if (host_diag & HOST_DIAG_RESET_ADAPTER)
+ return -1;
+
+ abs_state = instance->instancet->read_fw_status_reg(instance->reg_set)
+ & MFI_STATE_MASK;
+ retry = 0;
+
+ while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
+ msleep(100);
+ abs_state = instance->instancet->
+ read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+ }
+ if (abs_state <= MFI_STATE_FW_INIT) {
+ dev_warn(&instance->pdev->dev,
+ "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n",
+ abs_state, __func__, __LINE__);
+ return -1;
+ }
+
return 0;
}
@@ -2674,11 +2738,11 @@ out:
/* Core fusion reset function */
int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
{
- int retval = SUCCESS, i, retry = 0, convert = 0;
+ int retval = SUCCESS, i, convert = 0;
struct megasas_instance *instance;
struct megasas_cmd_fusion *cmd_fusion;
struct fusion_context *fusion;
- u32 host_diag, abs_state, status_reg, reset_adapter;
+ u32 abs_state, status_reg, reset_adapter;
u32 io_timeout_in_crash_mode = 0;
struct scsi_cmnd *scmd_local = NULL;
@@ -2832,81 +2896,10 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
/* Now try to reset the chip */
for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
- writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_1ST_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_2ND_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_3RD_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_4TH_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_5TH_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
- writel(MPI2_WRSEQ_6TH_KEY_VALUE,
- &instance->reg_set->fusion_seq_offset);
-
- /* Check that the diag write enable (DRWE) bit is on */
- host_diag = readl(&instance->reg_set->fusion_host_diag);
- retry = 0;
- while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
- msleep(100);
- host_diag =
- readl(&instance->reg_set->fusion_host_diag);
- if (retry++ == 100) {
- dev_warn(&instance->pdev->dev,
- "Host diag unlock failed! "
- "for scsi%d\n",
- instance->host->host_no);
- break;
- }
- }
- if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
- continue;
-
- /* Send chip reset command */
- writel(host_diag | HOST_DIAG_RESET_ADAPTER,
- &instance->reg_set->fusion_host_diag);
- msleep(3000);
-
- /* Make sure reset adapter bit is cleared */
- host_diag = readl(&instance->reg_set->fusion_host_diag);
- retry = 0;
- while (host_diag & HOST_DIAG_RESET_ADAPTER) {
- msleep(100);
- host_diag =
- readl(&instance->reg_set->fusion_host_diag);
- if (retry++ == 1000) {
- dev_warn(&instance->pdev->dev,
- "Diag reset adapter never "
- "cleared for scsi%d!\n",
- instance->host->host_no);
- break;
- }
- }
- if (host_diag & HOST_DIAG_RESET_ADAPTER)
- continue;
- abs_state =
- instance->instancet->read_fw_status_reg(
- instance->reg_set) & MFI_STATE_MASK;
- retry = 0;
-
- while ((abs_state <= MFI_STATE_FW_INIT) &&
- (retry++ < 1000)) {
- msleep(100);
- abs_state =
- instance->instancet->read_fw_status_reg(
- instance->reg_set) & MFI_STATE_MASK;
- }
- if (abs_state <= MFI_STATE_FW_INIT) {
- dev_warn(&instance->pdev->dev, "firmware "
- "state < MFI_STATE_FW_INIT, state = "
- "0x%x for scsi%d\n", abs_state,
- instance->host->host_no);
+ if (instance->instancet->adp_reset
+ (instance, instance->reg_set))
continue;
- }
/* Wait for FW to become ready */
if (megasas_transition_to_ready(instance, 1)) {
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