On 5.2.2016 13:24, Sumit Saxena wrote: >> -----Original Message----- >> From: Tomas Henzl [mailto:thenzl@xxxxxxxxxx] >> Sent: Friday, January 29, 2016 9:47 PM >> To: Sumit Saxena; jbottomley@xxxxxxxxxxxxx; hch@xxxxxxxxxxxxx; >> martin.petersen@xxxxxxxxxx >> Cc: linux-scsi@xxxxxxxxxxxxxxx; kashyap.desai@xxxxxxxxxxxxx; Uday > Lingala >> Subject: Re: [PATCH 1/2] megaraid_sas: Fix for IO failing post OCR in > SRIOV >> environment >> >> On 28.1.2016 16:44, Sumit Saxena wrote: >>> Driver assumes that VFs always have peers present whenever they have > same >> LD IDs. But this is not the case. >>> This patch handles the above mentioned by explicitly checking for a > peer >> before making HA/non-HA path decision. >>> Signed-off-by: Uday Lingala <uday.lingala@xxxxxxxxxxxxx> >>> Signed-off-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx> >>> >>> --- >>> drivers/scsi/megaraid/megaraid_sas.h | 13 ++++++--- >>> drivers/scsi/megaraid/megaraid_sas_base.c | 6 +++-- >>> drivers/scsi/megaraid/megaraid_sas_fusion.c | 42 >>> ++++++++++++++++++----------- >>> 3 files changed, 39 insertions(+), 22 deletions(-) >>> >>> diff --git a/drivers/scsi/megaraid/megaraid_sas.h >>> b/drivers/scsi/megaraid/megaraid_sas.h >>> index b6fdb48..4484e63 100644 >>> --- a/drivers/scsi/megaraid/megaraid_sas.h >>> +++ b/drivers/scsi/megaraid/megaraid_sas.h >>> @@ -393,6 +393,7 @@ enum MR_EVT_ARGS { >>> >>> >>> #define SGE_BUFFER_SIZE 4096 >>> +#define MEGASAS_CLUSTER_ID_SIZE 16 >>> /* >>> * define constants for device list query options >>> */ >>> @@ -1227,7 +1228,8 @@ struct megasas_ctrl_info { >>> */ >>> struct { >>> #if defined(__BIG_ENDIAN_BITFIELD) >>> - u32 reserved:26; >>> + u32 reserved:25; >>> + u32 passive:1; >>> u32 premiumFeatureMismatch:1; >>> u32 ctrlPropIncompatible:1; >>> u32 fwVersionMismatch:1; >>> @@ -1241,11 +1243,12 @@ struct megasas_ctrl_info { >>> u32 fwVersionMismatch:1; >>> u32 ctrlPropIncompatible:1; >>> u32 premiumFeatureMismatch:1; >>> - u32 reserved:26; >>> + u32 passive:1; >>> + u32 reserved:25; >>> #endif >>> } cluster; >>> >>> - char clusterId[16]; /*7D4h */ >>> + char clusterId[MEGASAS_CLUSTER_ID_SIZE]; /*0x7D4 */ >>> struct { >>> u8 maxVFsSupported; /*0x7E4*/ >>> u8 numVFsEnabled; /*0x7E5*/ >>> @@ -2126,7 +2129,9 @@ struct megasas_instance { >>> char skip_heartbeat_timer_del; >>> u8 requestorId; >>> char PlasmaFW111; >>> - char mpio; >>> + char clusterId[MEGASAS_CLUSTER_ID_SIZE]; >>> + u8 peerIsPresent; >>> + u8 passive; >>> u16 throttlequeuedepth; >>> u8 mask_interrupts; >>> u16 max_chain_frame_sz; >>> diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c >>> b/drivers/scsi/megaraid/megaraid_sas_base.c >>> index 54922e5..52f3419 100644 >>> --- a/drivers/scsi/megaraid/megaraid_sas_base.c >>> +++ b/drivers/scsi/megaraid/megaraid_sas_base.c >>> @@ -1943,7 +1943,7 @@ void megaraid_sas_kill_hba(struct >> megasas_instance *instance) >>> writel(MFI_STOP_ADP, &instance->reg_set->doorbell); >>> /* Flush */ >>> readl(&instance->reg_set->doorbell); >>> - if (instance->mpio && instance->requestorId) >>> + if (instance->requestorId && instance->peerIsPresent) >>> memset(instance->ld_ids, 0xff, >> MEGASAS_MAX_LD_IDS); >>> } else { >>> writel(MFI_STOP_ADP, >>> @@ -5182,7 +5182,9 @@ static int megasas_init_fw(struct >>> megasas_instance *instance) >>> >>> tmp_sectors = min_t(u32, max_sectors_1, max_sectors_2); >>> >>> - instance->mpio = ctrl_info->adapterOperations2.mpio; >>> + instance->peerIsPresent = ctrl_info->cluster.peerIsPresent; >>> + instance->passive = ctrl_info->cluster.passive; >>> + memcpy(instance->clusterId, ctrl_info->clusterId, >>> +sizeof(instance->clusterId)); >>> instance->UnevenSpanSupport = >>> ctrl_info->adapterOperations2.supportUnevenSpans; >>> if (instance->UnevenSpanSupport) { >>> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c >>> b/drivers/scsi/megaraid/megaraid_sas_fusion.c >>> index be9c3f1..d9d0029 100644 >>> --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c >>> +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c >>> @@ -3325,27 +3325,37 @@ out: >>> return ret; >>> } >>> >>> +/*SRIOV get other instance in cluster if any*/ struct >>> +megasas_instance *megasas_get_peer_instance(struct megasas_instance >>> +*instance) { >>> + int i; >>> + >>> + for (i = 0; i < MAX_MGMT_ADAPTERS; i++) { >>> + if (megasas_mgmt_info.instance[i] && >>> + (megasas_mgmt_info.instance[i] != instance) && >>> + megasas_mgmt_info.instance[i]->requestorId && >>> + megasas_mgmt_info.instance[i]->peerIsPresent && >>> + > (memcmp((megasas_mgmt_info.instance[i]->clusterId), >>> + instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == > 0)) >>> + return megasas_mgmt_info.instance[i]; >>> + } >>> + return NULL; >>> +} >>> + >>> /* Check for a second path that is currently UP */ int >>> megasas_check_mpio_paths(struct megasas_instance *instance, >>> struct scsi_cmnd *scmd) >>> { >>> - int i, j, retval = (DID_RESET << 16); >>> - >>> - if (instance->mpio && instance->requestorId) { >> Seems to me that you've removed this test (instance->requestorId) maybe > it is >> not needed, is it removed intentionally ? > Sorry for delay in response. This is removed intentionally. ok, thanks, Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx> Tomas -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
