From 9e77018eefafbf2d480e5868de11a7e49c9b1858 Mon Sep 17 00:00:00 2001 From: Shivasharan S Date: Tue, 16 Oct 2018 23:37:49 -0700 Subject: [PATCH] scsi: megaraid_sas: optimize raid context access in IO path No functional change. Use local variables when accessing raid context in IO path. Improves code readability. Signed-off-by: Shivasharan S Signed-off-by: Martin K. Petersen --- drivers/scsi/megaraid/megaraid_sas_fusion.c | 74 +++++++++------------ 1 file changed, 31 insertions(+), 43 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 11cb3faa6779..7df7e2c8d4b3 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -2627,19 +2627,22 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, struct MR_DRV_RAID_MAP_ALL *local_map_ptr; u8 *raidLUN; unsigned long spinlock_flags; - union RAID_CONTEXT_UNION *praid_context; struct MR_LD_RAID *raid = NULL; struct MR_PRIV_DEVICE *mrdev_priv; + struct RAID_CONTEXT *rctx; + struct RAID_CONTEXT_G35 *rctx_g35; device_id = MEGASAS_DEV_INDEX(scp); fusion = instance->ctrl_context; io_request = cmd->io_request; - io_request->RaidContext.raid_context.virtual_disk_tgt_id = - cpu_to_le16(device_id); - io_request->RaidContext.raid_context.status = 0; - io_request->RaidContext.raid_context.ex_status = 0; + rctx = &io_request->RaidContext.raid_context; + rctx_g35 = &io_request->RaidContext.raid_context_g35; + + rctx->virtual_disk_tgt_id = cpu_to_le16(device_id); + rctx->status = 0; + rctx->ex_status = 0; req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc; @@ -2715,11 +2718,10 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, raid = MR_LdRaidGet(ld, local_map_ptr); if (!raid || (!fusion->fast_path_io)) { - io_request->RaidContext.raid_context.reg_lock_flags = 0; + rctx->reg_lock_flags = 0; fp_possible = false; } else { - if (MR_BuildRaidContext(instance, &io_info, - &io_request->RaidContext.raid_context, + if (MR_BuildRaidContext(instance, &io_info, rctx, local_map_ptr, &raidLUN)) fp_possible = (io_info.fpOkForIo > 0) ? true : false; } @@ -2727,8 +2729,6 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, cmd->request_desc->SCSIIO.MSIxIndex = instance->reply_map[raw_smp_processor_id()]; - praid_context = &io_request->RaidContext; - if (instance->adapter_type == VENTURA_SERIES) { /* FP for Optimal raid level 1. * All large RAID-1 writes (> 32 KiB, both WT and WB modes) @@ -2765,17 +2765,17 @@ 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 (is_stream_detected(&io_request->RaidContext.raid_context_g35)) + if (is_stream_detected(rctx_g35)) fp_possible = false; } /* If raid is NULL, set CPU affinity to default CPU0 */ if (raid) - megasas_set_raidflag_cpu_affinity(praid_context, + megasas_set_raidflag_cpu_affinity(&io_request->RaidContext, raid, fp_possible, io_info.isRead, scsi_buff_len); else - praid_context->raid_context_g35.routing_flags |= + rctx_g35->routing_flags |= (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT); } @@ -2787,25 +2787,20 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, (MPI2_REQ_DESCRIPT_FLAGS_FP_IO << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); if (instance->adapter_type == INVADER_SERIES) { - if (io_request->RaidContext.raid_context.reg_lock_flags == - REGION_TYPE_UNUSED) + if (rctx->reg_lock_flags == REGION_TYPE_UNUSED) cmd->request_desc->SCSIIO.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); - io_request->RaidContext.raid_context.type - = MPI2_TYPE_CUDA; - io_request->RaidContext.raid_context.nseg = 0x1; + rctx->type = MPI2_TYPE_CUDA; + rctx->nseg = 0x1; io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH); - io_request->RaidContext.raid_context.reg_lock_flags |= + rctx->reg_lock_flags |= (MR_RL_FLAGS_GRANT_DESTINATION_CUDA | MR_RL_FLAGS_SEQ_NUM_ENABLE); } else if (instance->adapter_type == VENTURA_SERIES) { - io_request->RaidContext.raid_context_g35.nseg_type |= - (1 << RAID_CONTEXT_NSEG_SHIFT); - io_request->RaidContext.raid_context_g35.nseg_type |= - (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); - io_request->RaidContext.raid_context_g35.routing_flags |= - (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); + rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT); + rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); + rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH); } @@ -2819,11 +2814,9 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG; cmd->pd_r1_lb = io_info.pd_after_lb; if (instance->adapter_type == VENTURA_SERIES) - io_request->RaidContext.raid_context_g35.span_arm - = io_info.span_arm; + rctx_g35->span_arm = io_info.span_arm; else - io_request->RaidContext.raid_context.span_arm - = io_info.span_arm; + rctx->span_arm = io_info.span_arm; } else scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG; @@ -2846,31 +2839,26 @@ megasas_build_ldio_fusion(struct megasas_instance *instance, /* populate the LUN field */ memcpy(io_request->LUN, raidLUN, 8); } else { - io_request->RaidContext.raid_context.timeout_value = + rctx->timeout_value = cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec); cmd->request_desc->SCSIIO.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); if (instance->adapter_type == INVADER_SERIES) { if (io_info.do_fp_rlbypass || - (io_request->RaidContext.raid_context.reg_lock_flags - == REGION_TYPE_UNUSED)) + (rctx->reg_lock_flags == REGION_TYPE_UNUSED)) cmd->request_desc->SCSIIO.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); - io_request->RaidContext.raid_context.type - = MPI2_TYPE_CUDA; - io_request->RaidContext.raid_context.reg_lock_flags |= + rctx->type = MPI2_TYPE_CUDA; + rctx->reg_lock_flags |= (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 | - MR_RL_FLAGS_SEQ_NUM_ENABLE); - io_request->RaidContext.raid_context.nseg = 0x1; + MR_RL_FLAGS_SEQ_NUM_ENABLE); + rctx->nseg = 0x1; } else if (instance->adapter_type == VENTURA_SERIES) { - io_request->RaidContext.raid_context_g35.routing_flags |= - (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); - io_request->RaidContext.raid_context_g35.nseg_type |= - (1 << RAID_CONTEXT_NSEG_SHIFT); - io_request->RaidContext.raid_context_g35.nseg_type |= - (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); + rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); + rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT); + rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); } io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; io_request->DevHandle = cpu_to_le16(device_id); -- 2.30.2