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scsi: megaraid_sas: cpu select rework.

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No functional change. Code refactor.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shivasharan S 2017-02-10 00:59:02 -08:00 committed by Martin K. Petersen
parent 18bbcabdc6
commit f6c0d55c5b
1 changed files with 100 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

175
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -1818,6 +1818,73 @@ static void megasas_stream_detect(struct megasas_instance *instance,
}
/**
* megasas_set_raidflag_cpu_affinity - This function sets the cpu
* affinity (cpu of the controller) and raid_flags in the raid context
* based on IO type.
*
* @praid_context: IO RAID context
* @raid: LD raid map
* @fp_possible: Is fast path possible?
* @is_read: Is read IO?
*
*/
static void
megasas_set_raidflag_cpu_affinity(union RAID_CONTEXT_UNION *praid_context,
struct MR_LD_RAID *raid, bool fp_possible,
u8 is_read)
{
u8 cpu_sel = MR_RAID_CTX_CPUSEL_0;
struct RAID_CONTEXT_G35 *rctx_g35;
rctx_g35 = &praid_context->raid_context_g35;
if (fp_possible) {
if (is_read) {
if ((raid->cpuAffinity.pdRead.cpu0) &&
(raid->cpuAffinity.pdRead.cpu1))
cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.pdRead.cpu1)
cpu_sel = MR_RAID_CTX_CPUSEL_1;
} else {
if ((raid->cpuAffinity.pdWrite.cpu0) &&
(raid->cpuAffinity.pdWrite.cpu1))
cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.pdWrite.cpu1)
cpu_sel = MR_RAID_CTX_CPUSEL_1;
/* Fast path cache by pass capable R0/R1 VD */
if ((raid->level <= 1) &&
(raid->capability.fp_cache_bypass_capable)) {
rctx_g35->routing_flags.bits.sld = 1;
rctx_g35->raid_flags =
(MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
}
}
} else {
if (is_read) {
if ((raid->cpuAffinity.ldRead.cpu0) &&
(raid->cpuAffinity.ldRead.cpu1))
cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.ldRead.cpu1)
cpu_sel = MR_RAID_CTX_CPUSEL_1;
} else {
if ((raid->cpuAffinity.ldWrite.cpu0) &&
(raid->cpuAffinity.ldWrite.cpu1))
cpu_sel = MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.ldWrite.cpu1)
cpu_sel = MR_RAID_CTX_CPUSEL_1;
if (rctx_g35->stream_detected &&
(raid->level == 5) &&
(raid->writeMode == MR_RL_WRITE_THROUGH_MODE) &&
(cpu_sel == MR_RAID_CTX_CPUSEL_FCFS))
cpu_sel = MR_RAID_CTX_CPUSEL_0;
}
}
rctx_g35->routing_flags.bits.cpu_sel = cpu_sel;
}
/**
* megasas_build_ldio_fusion - Prepares IOs to devices
* @instance: Adapter soft state
@ -1832,8 +1899,10 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scp,
struct megasas_cmd_fusion *cmd)
{
u8 fp_possible;
u32 start_lba_lo, start_lba_hi, device_id, datalength = 0, ld;
bool fp_possible;
u16 ld;
u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
u32 scsi_buff_len;
struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
struct IO_REQUEST_INFO io_info;
@ -1842,7 +1911,8 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
u8 *raidLUN;
unsigned long spinlock_flags;
union RAID_CONTEXT_UNION *praid_context;
struct MR_LD_RAID *raid;
struct MR_LD_RAID *raid = NULL;
struct MR_PRIV_DEVICE *mrdev_priv;
device_id = MEGASAS_DEV_INDEX(scp);
@ -1858,7 +1928,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
start_lba_lo = 0;
start_lba_hi = 0;
fp_possible = 0;
fp_possible = false;
/*
* 6-byte READ(0x08) or WRITE(0x0A) cdb
@ -1915,7 +1985,8 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
io_info.numBlocks = datalength;
io_info.ldTgtId = device_id;
io_info.r1_alt_dev_handle = MR_PD_INVALID;
io_request->DataLength = cpu_to_le32(scsi_bufflen(scp));
scsi_buff_len = scsi_bufflen(scp);
io_request->DataLength = cpu_to_le32(scsi_buff_len);
if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
io_info.isRead = 1;
@ -1927,12 +1998,12 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
instance->fw_supported_vd_count) || (!fusion->fast_path_io)) {
io_request->RaidContext.raid_context.reg_lock_flags = 0;
fp_possible = 0;
fp_possible = false;
} else {
if (MR_BuildRaidContext(instance, &io_info,
&io_request->RaidContext.raid_context,
local_map_ptr, &raidLUN))
fp_possible = io_info.fpOkForIo;
fp_possible = (io_info.fpOkForIo > 0) ? true : false;
}
/* Use raw_smp_processor_id() for now until cmd->request->cpu is CPU
@ -1941,6 +2012,8 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
raw_smp_processor_id() % instance->msix_vectors : 0;
praid_context = &io_request->RaidContext;
if (instance->is_ventura) {
spin_lock_irqsave(&instance->stream_lock, spinlock_flags);
megasas_stream_detect(instance, cmd, &io_info);
@ -1948,12 +2021,28 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
/* In ventura if stream detected for a read and it is read ahead
* capable make this IO as LDIO
*/
if (io_request->RaidContext.raid_context_g35.stream_detected &&
io_info.isRead && io_info.ra_capable)
if (praid_context->raid_context_g35.stream_detected &&
io_info.isRead && io_info.ra_capable)
fp_possible = false;
}
praid_context = &io_request->RaidContext;
if (io_info.r1_alt_dev_handle != MR_PD_INVALID) {
mrdev_priv = scp->device->hostdata;
if (atomic_inc_return(&instance->fw_outstanding) >
(instance->host->can_queue)) {
fp_possible = false;
atomic_dec(&instance->fw_outstanding);
}
}
/* If raid is NULL, set CPU affinity to default CPU0 */
if (raid)
megasas_set_raidflag_cpu_affinity(praid_context,
raid, fp_possible, io_info.isRead);
else
praid_context->raid_context_g35.routing_flags.bits.cpu_sel =
MR_RAID_CTX_CPUSEL_0;
}
if (fp_possible) {
megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
@ -2016,36 +2105,6 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
io_request->DevHandle = io_info.devHandle;
/* populate the LUN field */
memcpy(io_request->LUN, raidLUN, 8);
if (instance->is_ventura) {
if (io_info.isRead) {
if ((raid->cpuAffinity.pdRead.cpu0) &&
(raid->cpuAffinity.pdRead.cpu1))
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.pdRead.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.pdWrite.cpu0)
&& (raid->cpuAffinity.pdWrite.cpu1))
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_FCFS;
else if (raid->cpuAffinity.pdWrite.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;
if (praid_context->raid_context_g35.routing_flags.bits.sld) {
praid_context->raid_context_g35.raid_flags
= (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS
<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT);
}
}
}
} else {
io_request->RaidContext.raid_context.timeout_value =
cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
@ -2074,40 +2133,6 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
io_request->DevHandle = cpu_to_le16(device_id);
if (instance->is_ventura) {
if (io_info.isRead) {
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;
if (io_request->RaidContext.raid_context_g35.stream_detected
&& (raid->level == 5) &&
(raid->writeMode == MR_RL_WRITE_THROUGH_MODE)) {
if (praid_context->raid_context_g35.routing_flags.bits.cpu_sel
== MR_RAID_CTX_CPUSEL_FCFS)
praid_context->raid_context_g35.routing_flags.bits.cpu_sel
= MR_RAID_CTX_CPUSEL_0;
}
}
}
} /* Not FP */
}