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Commit 8bf7c65d authored by Shivasharan S's avatar Shivasharan S Committed by Martin K. Petersen
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scsi: megaraid_sas: raid 1 fast path code optimize 

No functional change. Code refactor.

Remove function megasas_fpio_to_ldio as we never require to convert fpio
to ldio because of frame unavailability.  Grab extra frame of raid 1
write fast path before it creates first frame as Fast Path.  Removed
is_raid_1_fp_write flag as raid 1 write fast path command is decided
using r1_alt_dev_handle only.  Move resetting megasas_cmd_fusion fields
at common function megasas_return_cmd_fusion.
Signed-off-by: default avatarShivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent f6c0d55c
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Inline Side-by-side
Showing with 118 additions and 248 deletions
drivers/scsi/megaraid/megaraid_sas_fp.c
View file @ 8bf7c65d
......@@ -1338,20 +1338,8 @@ MR_BuildRaidContext(struct megasas_instance *instance,
ref_in_start_stripe, io_info,
pRAID_Context, map);
/* If IO on an invalid Pd, then FP is not possible.*/
if (io_info->devHandle == cpu_to_le16(MR_PD_INVALID))
if (io_info->devHandle == MR_DEVHANDLE_INVALID)
io_info->fpOkForIo = FALSE;
/* if FP possible, set the SLUD bit in
* regLockFlags for ventura
*/
else if ((instance->is_ventura) && (!isRead) &&
(raid->writeMode == MR_RL_WRITE_BACK_MODE) &&
(raid->capability.fp_cache_bypass_capable))
((struct RAID_CONTEXT_G35 *) pRAID_Context)->routing_flags.bits.sld = 1;
/* set raid 1/10 fast path write capable bit in io_info */
if (io_info->fpOkForIo &&
(io_info->r1_alt_dev_handle != MR_PD_INVALID) &&
(raid->level == 1) && !isRead)
io_info->is_raid_1_fp_write = 1;
return retval;
} else if (isRead) {
uint stripIdx;
......
drivers/scsi/megaraid/megaraid_sas_fusion.c
View file @ 8bf7c65d
......@@ -181,7 +181,9 @@ inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd)
{
cmd->scmd = NULL;
memset(cmd->io_request, 0, sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE);
cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
cmd->cmd_completed = false;
}
/**
......@@ -701,7 +703,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
memset(cmd->io_request, 0,
sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
cmd->io_request_phys_addr = io_req_base_phys + offset;
cmd->is_raid_1_fp_write = 0;
cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
}
if (megasas_create_sg_sense_fusion(instance))
......@@ -1984,7 +1986,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
io_info.numBlocks = datalength;
io_info.ldTgtId = device_id;
io_info.r1_alt_dev_handle = MR_PD_INVALID;
io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
scsi_buff_len = scsi_bufflen(scp);
io_request->DataLength = cpu_to_le32(scsi_buff_len);
......@@ -2025,7 +2027,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
io_info.isRead && io_info.ra_capable)
fp_possible = false;
if (io_info.r1_alt_dev_handle != MR_PD_INVALID) {
if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
mrdev_priv = scp->device->hostdata;
if (atomic_inc_return(&instance->fw_outstanding) >
......@@ -2090,9 +2092,10 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
} else
scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
cmd->is_raid_1_fp_write = io_info.is_raid_1_fp_write;
if (io_info.is_raid_1_fp_write)
if (instance->is_ventura)
cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle;
else
cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID;
if ((raidLUN[0] == 1) &&
(local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) {
......@@ -2451,72 +2454,6 @@ megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
}
/*
* megasas_fpio_to_ldio-
* This function converts an fp io to ldio
*/
void megasas_fpio_to_ldio(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd, struct scsi_cmnd *scmd)
{
struct fusion_context *fusion;
union RAID_CONTEXT_UNION *praid_context;
struct MR_LD_RAID *raid;
struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
u32 device_id, ld;
fusion = instance->ctrl_context;
cmd->request_desc->SCSIIO.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
<< MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
cmd->io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
cmd->io_request->DevHandle = cpu_to_le16(MEGASAS_DEV_INDEX(scmd));
/*remove FAST PATH ENABLE bit in IoFlags */
cmd->io_request->IoFlags &=
cpu_to_le16(~MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
/* if the numSGE > max_sge_in_main_sge set the chain offset*/
if (cmd->io_request->RaidContext.raid_context_g35.num_sge >
fusion->max_sge_in_main_msg)
cmd->io_request->ChainOffset = fusion->chain_offset_io_request;
memcpy(cmd->io_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);
cmd->io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
cmd->io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
cmd->io_request->EEDPFlags = 0;
cmd->io_request->Control = 0;
cmd->io_request->EEDPBlockSize = 0;
cmd->is_raid_1_fp_write = 0;
device_id = MEGASAS_DEV_INDEX(cmd->scmd);
local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
raid = MR_LdRaidGet(ld, local_map_ptr);
praid_context = &cmd->io_request->RaidContext;
if (cmd->scmd->sc_data_direction == PCI_DMA_FROMDEVICE) {
if ((raid->cpuAffinity.ldRead.cpu0)
&& (raid->cpuAffinity.ldRead.cpu1))
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.ldRead.cpu1)
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_1;
else
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_0;
} else {
if ((raid->cpuAffinity.ldWrite.cpu0)
&& (raid->cpuAffinity.ldWrite.cpu1))
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.ldWrite.cpu1)
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_1;
else
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_0;
}
}
/* megasas_prepate_secondRaid1_IO
* It prepares the raid 1 second IO
......@@ -2527,60 +2464,36 @@ void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance,
{
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL;
struct fusion_context *fusion;
fusion = instance->ctrl_context;
req_desc = cmd->request_desc;
if (r1_cmd) {
/* copy the io request frame as well
* as 8 SGEs data for r1 command
*/
/* copy the io request frame as well as 8 SGEs data for r1 command*/
memcpy(r1_cmd->io_request, cmd->io_request,
sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
(sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)));
memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL,
(fusion->max_sge_in_main_msg *
sizeof(union MPI2_SGE_IO_UNION)));
(fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION)));
/*sense buffer is different for r1 command*/
r1_cmd->io_request->SenseBufferLowAddress =
cpu_to_le32(r1_cmd->sense_phys_addr);
r1_cmd->scmd = cmd->scmd;
req_desc2 =
megasas_get_request_descriptor(instance, r1_cmd->index-1);
if (req_desc2) {
req_desc2 = megasas_get_request_descriptor(instance,
(r1_cmd->index - 1));
req_desc2->Words = 0;
r1_cmd->request_desc = req_desc2;
req_desc2->SCSIIO.SMID =
cpu_to_le16(r1_cmd->index);
req_desc2->SCSIIO.RequestFlags =
req_desc->SCSIIO.RequestFlags;
r1_cmd->is_raid_1_fp_write = 1;
r1_cmd->request_desc->SCSIIO.DevHandle =
cmd->r1_alt_dev_handle;
req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index);
req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags;
r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle;
r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle;
r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle;
cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
cpu_to_le16(r1_cmd->index);
r1_cmd->io_request->RaidContext.raid_context_g35.smid.peer_smid =
cpu_to_le16(cmd->index);
/* MSIxIndex of both commands request
* descriptors should be same
*/
/*MSIxIndex of both commands request descriptors should be same*/
r1_cmd->request_desc->SCSIIO.MSIxIndex =
cmd->request_desc->SCSIIO.MSIxIndex;
/*span arm is different for r1 cmd*/
r1_cmd->io_request->RaidContext.raid_context_g35.span_arm =
cmd->io_request->RaidContext.raid_context_g35.span_arm + 1;
} else {
megasas_return_cmd_fusion(instance, r1_cmd);
dev_info(&instance->pdev->dev,
"unable to get request descriptor, firing as normal IO\n");
atomic_dec(&instance->fw_outstanding);
megasas_fpio_to_ldio(instance, cmd, cmd->scmd);
}
} else {
dev_info(&instance->pdev->dev,
"unable to get command, firing as normal IO\n");
atomic_dec(&instance->fw_outstanding);
megasas_fpio_to_ldio(instance, cmd, cmd->scmd);
}
}
/**
......@@ -2624,10 +2537,6 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
index = cmd->index;
req_desc = megasas_get_request_descriptor(instance, index-1);
if (!req_desc) {
atomic_dec(&instance->fw_outstanding);
return SCSI_MLQUEUE_HOST_BUSY;
}
req_desc->Words = 0;
cmd->request_desc = req_desc;
......@@ -2657,12 +2566,7 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
/* driver side count always should be less than max_fw_cmds
* to get new command
*/
if (cmd->is_raid_1_fp_write &&
atomic_inc_return(&instance->fw_outstanding) >
(instance->host->can_queue)) {
megasas_fpio_to_ldio(instance, cmd, cmd->scmd);
atomic_dec(&instance->fw_outstanding);
} else if (cmd->is_raid_1_fp_write) {
if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) {
r1_cmd = megasas_get_cmd_fusion(instance,
(scmd->request->tag + instance->max_fw_cmds));
megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd);
......@@ -2683,6 +2587,61 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
return 0;
}
/**
* megasas_complete_r1_command -
* completes R1 FP write commands which has valid peer smid
* @instance: Adapter soft state
* @cmd_fusion: MPT command frame
*
*/
static inline void
megasas_complete_r1_command(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd)
{
u8 *sense, status, ex_status;
u32 data_length;
u16 peer_smid;
struct fusion_context *fusion;
struct megasas_cmd_fusion *r1_cmd = NULL;
struct scsi_cmnd *scmd_local = NULL;
struct RAID_CONTEXT_G35 *rctx_g35;
rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35;
fusion = instance->ctrl_context;
peer_smid = le16_to_cpu(rctx_g35->smid.peer_smid);
r1_cmd = fusion->cmd_list[peer_smid - 1];
scmd_local = cmd->scmd;
status = rctx_g35->status;
ex_status = rctx_g35->ex_status;
data_length = cmd->io_request->DataLength;
sense = cmd->sense;
cmd->cmd_completed = true;
/* Check if peer command is completed or not*/
if (r1_cmd->cmd_completed) {
rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35;
if (rctx_g35->status != MFI_STAT_OK) {
status = rctx_g35->status;
ex_status = rctx_g35->ex_status;
data_length = r1_cmd->io_request->DataLength;
sense = r1_cmd->sense;
}
megasas_return_cmd_fusion(instance, r1_cmd);
map_cmd_status(fusion, scmd_local, status, ex_status,
le32_to_cpu(data_length), sense);
if (instance->ldio_threshold &&
megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
atomic_dec(&instance->ldio_outstanding);
scmd_local->SCp.ptr = NULL;
megasas_return_cmd_fusion(instance, cmd);
scsi_dma_unmap(scmd_local);
scmd_local->scsi_done(scmd_local);
}
}
/**
* complete_cmd_fusion - Completes command
* @instance: Adapter soft state
......@@ -2696,10 +2655,10 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
struct fusion_context *fusion;
struct megasas_cmd *cmd_mfi;
struct megasas_cmd_fusion *cmd_fusion, *r1_cmd = NULL;
struct megasas_cmd_fusion *cmd_fusion;
u16 smid, num_completed;
u8 reply_descript_type, *sense;
u32 status, extStatus, device_id, data_length;
u8 reply_descript_type, *sense, status, extStatus;
u32 device_id, data_length;
union desc_value d_val;
struct LD_LOAD_BALANCE_INFO *lbinfo;
int threshold_reply_count = 0;
......@@ -2729,26 +2688,12 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
while (d_val.u.low != cpu_to_le32(UINT_MAX) &&
d_val.u.high != cpu_to_le32(UINT_MAX)) {
/*
* Ensure that the peer command is NULL here in case a
* command has completed but the R1 FP Write peer has
* not completed yet.If not null, it's possible that
* another thread will complete the peer
* command and should not.
*/
r1_cmd = NULL;
smid = le16_to_cpu(reply_desc->SMID);
cmd_fusion = fusion->cmd_list[smid - 1];
scsi_io_req =
(struct MPI2_RAID_SCSI_IO_REQUEST *)
scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
cmd_fusion->io_request;
if (cmd_fusion->scmd)
cmd_fusion->scmd->SCp.ptr = NULL;
scmd_local = cmd_fusion->scmd;
status = scsi_io_req->RaidContext.raid_context.status;
extStatus = scsi_io_req->RaidContext.raid_context.ex_status;
......@@ -2768,88 +2713,33 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
break;
case MPI2_FUNCTION_SCSI_IO_REQUEST: /*Fast Path IO.*/
/* Update load balancing info */
device_id = MEGASAS_DEV_INDEX(scmd_local);
lbinfo = &fusion->load_balance_info[device_id];
/*
* check for the raid 1/10 fast path writes
*/
if (!cmd_fusion->is_raid_1_fp_write &&
if (fusion->load_balance_info &&
(cmd_fusion->scmd->SCp.Status &
MEGASAS_LOAD_BALANCE_FLAG)) {
device_id = MEGASAS_DEV_INDEX(scmd_local);
lbinfo = &fusion->load_balance_info[device_id];
atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
cmd_fusion->scmd->SCp.Status &=
~MEGASAS_LOAD_BALANCE_FLAG;
} else if (cmd_fusion->is_raid_1_fp_write) {
/* get peer command */
if (cmd_fusion->index < instance->max_fw_cmds)
r1_cmd = fusion->cmd_list[(cmd_fusion->index +
instance->max_fw_cmds)-1];
else {
r1_cmd =
fusion->cmd_list[(cmd_fusion->index -
instance->max_fw_cmds)-1];
cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
}
cmd_fusion->cmd_completed = true;
}
if (reply_descript_type ==
MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
if (megasas_dbg_lvl == 5)
dev_err(&instance->pdev->dev, "\nFAST Path "
"IO Success\n");
}
/* Fall thru and complete IO */
//Fall thru and complete IO
case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
/* Map the FW Cmd Status */
/*
* check for the raid 1/10 fast path writes
*/
if (r1_cmd && r1_cmd->is_raid_1_fp_write
&& r1_cmd->cmd_completed) {
/*
* if the peer Raid 1/10 fast path failed,
* mark IO as failed to the scsi layer.
* over write the current status by the failed
* status makes sure that if any one of
* command fails,return fail status to
* scsi layer
*/
if (r1_cmd->io_request->RaidContext.raid_context.status !=
MFI_STAT_OK) {
status =
r1_cmd->io_request->RaidContext.raid_context.status;
extStatus =
r1_cmd->io_request->RaidContext.raid_context.ex_status;
data_length =
r1_cmd->io_request->DataLength;
sense = r1_cmd->sense;
}
r1_cmd->io_request->RaidContext.raid_context.status = 0;
r1_cmd->io_request->RaidContext.raid_context.ex_status = 0;
cmd_fusion->is_raid_1_fp_write = 0;
r1_cmd->is_raid_1_fp_write = 0;
r1_cmd->cmd_completed = false;
cmd_fusion->cmd_completed = false;
megasas_return_cmd_fusion(instance, r1_cmd);
}
if (!cmd_fusion->is_raid_1_fp_write) {
atomic_dec(&instance->fw_outstanding);
if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
map_cmd_status(fusion, scmd_local, status,
extStatus, data_length, sense);
scsi_io_req->RaidContext.raid_context.status = 0;
scsi_io_req->RaidContext.raid_context.ex_status = 0;
if (instance->ldio_threshold
&& megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)
extStatus, le32_to_cpu(data_length),
sense);
if (instance->ldio_threshold &&
(megasas_cmd_type(scmd_local) == READ_WRITE_LDIO))
atomic_dec(&instance->ldio_outstanding);
scmd_local->SCp.ptr = NULL;
megasas_return_cmd_fusion(instance, cmd_fusion);
scsi_dma_unmap(scmd_local);
scmd_local->scsi_done(scmd_local);
}
atomic_dec(&instance->fw_outstanding);
} else /* Optimal VD - R1 FP command completion. */
megasas_complete_r1_command(instance, cmd_fusion);
break;
case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
/* Poll mode. Dummy free.
* In case of Interrupt mode, caller has reverse check.
*/
......@@ -3896,7 +3786,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
{
int retval = SUCCESS, i, j, convert = 0;
struct megasas_instance *instance;
struct megasas_cmd_fusion *cmd_fusion, *mpt_cmd_fusion;
struct megasas_cmd_fusion *cmd_fusion, *r1_cmd;
struct fusion_context *fusion;
u32 abs_state, status_reg, reset_adapter;
u32 io_timeout_in_crash_mode = 0;
......@@ -3973,15 +3863,8 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
cmd_fusion = fusion->cmd_list[i];
/*check for extra commands issued by driver*/
if (instance->is_ventura) {
cmd_fusion->is_raid_1_fp_write = 0;
cmd_fusion->cmd_completed = false;
mpt_cmd_fusion =
fusion->cmd_list[i + instance->max_fw_cmds];
mpt_cmd_fusion->is_raid_1_fp_write = 0;
mpt_cmd_fusion->cmd_completed = false;
if (mpt_cmd_fusion->scmd)
megasas_return_cmd_fusion(instance,
mpt_cmd_fusion);
r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds];
megasas_return_cmd_fusion(instance, r1_cmd);
}
scmd_local = cmd_fusion->scmd;
if (cmd_fusion->scmd) {
......
drivers/scsi/megaraid/megaraid_sas_fusion.h
View file @ 8bf7c65d
......@@ -673,6 +673,7 @@ struct MPI2_IOC_INIT_REQUEST {
/* mrpriv defines */
#define MR_PD_INVALID 0xFFFF
#define MR_DEVHANDLE_INVALID 0xFFFF
#define MAX_SPAN_DEPTH 8
#define MAX_QUAD_DEPTH MAX_SPAN_DEPTH
#define MAX_RAIDMAP_SPAN_DEPTH (MAX_SPAN_DEPTH)
......@@ -921,7 +922,6 @@ struct IO_REQUEST_INFO {
u8 span_arm; /* span[7:5], arm[4:0] */
u8 pd_after_lb;
u16 r1_alt_dev_handle; /* raid 1/10 only */
bool is_raid_1_fp_write;
bool ra_capable;
};
......@@ -1060,7 +1060,6 @@ struct megasas_cmd_fusion {
u32 index;
u8 pd_r1_lb;
struct completion done;
bool is_raid_1_fp_write;
u16 r1_alt_dev_handle; /* raid 1/10 only*/
bool cmd_completed; /* raid 1/10 fp writes status holder */
......
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