[SCSI] megaraid_sas: Add High Availability clustering support using shared Logical Disks
Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 417d5f1..10b19a8 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -72,17 +72,6 @@
int
megasas_issue_polled(struct megasas_instance *instance,
struct megasas_cmd *cmd);
-
-u8
-MR_BuildRaidContext(struct megasas_instance *instance,
- struct IO_REQUEST_INFO *io_info,
- struct RAID_CONTEXT *pRAID_Context,
- struct MR_FW_RAID_MAP_ALL *map);
-u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map);
-struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
-
-u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
-
void
megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
@@ -652,6 +641,10 @@
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
init_frame->driver_operations.
mfi_capabilities.support_additional_msix = 1;
+ /* driver supports HA / Remote LUN over Fast Path interface */
+ init_frame->driver_operations.mfi_capabilities.support_fp_remote_lun
+ = 1;
+
init_frame->queue_info_new_phys_addr_lo = ioc_init_handle;
init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST);
@@ -1410,6 +1403,7 @@
struct IO_REQUEST_INFO io_info;
struct fusion_context *fusion;
struct MR_FW_RAID_MAP_ALL *local_map_ptr;
+ u8 *raidLUN;
device_id = MEGASAS_DEV_INDEX(instance, scp);
@@ -1494,7 +1488,7 @@
} else {
if (MR_BuildRaidContext(instance, &io_info,
&io_request->RaidContext,
- local_map_ptr))
+ local_map_ptr, &raidLUN))
fp_possible = io_info.fpOkForIo;
}
@@ -1537,6 +1531,8 @@
scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
io_request->DevHandle = io_info.devHandle;
+ /* populate the LUN field */
+ memcpy(io_request->LUN, raidLUN, 8);
} else {
io_request->RaidContext.timeoutValue =
local_map_ptr->raidMap.fpPdIoTimeoutSec;
@@ -1579,6 +1575,11 @@
u16 pd_index = 0;
struct MR_FW_RAID_MAP_ALL *local_map_ptr;
struct fusion_context *fusion = instance->ctrl_context;
+ u8 span, physArm;
+ u16 devHandle;
+ u32 ld, arRef, pd;
+ struct MR_LD_RAID *raid;
+ struct RAID_CONTEXT *pRAID_Context;
io_request = cmd->io_request;
device_id = MEGASAS_DEV_INDEX(instance, scmd);
@@ -1586,6 +1587,9 @@
+scmd->device->id;
local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
+ io_request->DataLength = scsi_bufflen(scmd);
+
+
/* Check if this is a system PD I/O */
if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
@@ -1623,6 +1627,54 @@
scmd->request->timeout / HZ;
}
} else {
+ if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
+ goto NonFastPath;
+
+ ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
+ if ((ld >= MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io))
+ goto NonFastPath;
+
+ raid = MR_LdRaidGet(ld, local_map_ptr);
+
+ /* check if this LD is FP capable */
+ if (!(raid->capability.fpNonRWCapable))
+ /* not FP capable, send as non-FP */
+ goto NonFastPath;
+
+ /* get RAID_Context pointer */
+ pRAID_Context = &io_request->RaidContext;
+
+ /* set RAID context values */
+ pRAID_Context->regLockFlags = REGION_TYPE_SHARED_READ;
+ pRAID_Context->timeoutValue = raid->fpIoTimeoutForLd;
+ pRAID_Context->VirtualDiskTgtId = device_id;
+ pRAID_Context->regLockRowLBA = 0;
+ pRAID_Context->regLockLength = 0;
+ pRAID_Context->configSeqNum = raid->seqNum;
+
+ /* get the DevHandle for the PD (since this is
+ fpNonRWCapable, this is a single disk RAID0) */
+ span = physArm = 0;
+ arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
+ pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
+ devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
+
+ /* build request descriptor */
+ cmd->request_desc->SCSIIO.RequestFlags =
+ (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
+ MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+ cmd->request_desc->SCSIIO.DevHandle = devHandle;
+
+ /* populate the LUN field */
+ memcpy(io_request->LUN, raid->LUN, 8);
+
+ /* build the raidScsiIO structure */
+ io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
+ io_request->DevHandle = devHandle;
+
+ return;
+
+NonFastPath:
io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
io_request->DevHandle = device_id;
cmd->request_desc->SCSIIO.RequestFlags =
@@ -1631,7 +1683,6 @@
}
io_request->RaidContext.VirtualDiskTgtId = device_id;
io_request->LUN[1] = scmd->device->lun;
- io_request->DataLength = scsi_bufflen(scmd);
}
/**