From 200aed582d6170a2687cd69095469b663f69f16f Mon Sep 17 00:00:00 2001 From: "Sumit.Saxena@avagotech.com" Date: Mon, 5 Jan 2015 20:05:58 +0530 Subject: [PATCH] megaraid_sas: endianness related bug fixes and code optimization This patch addresses below issues: 1) Few endianness bug fixes. 2) Break the iteration after (MAX_LOGICAL_DRIVES_EXT - 1)), instead of MAX_LOGICAL_DRIVES_EXT. 3) Optimization in MFI INIT frame before firing. 4) MFI IO frame should be 256bytes aligned. Code is optimized to reduce the size of frame for fusion adapters and make the MFI frame size calculation a bit transparent and readable. Cc: Signed-off-by: Kashyap Desai Signed-off-by: Sumit Saxena Signed-off-by: Chaitra Basappa Reviewed-by: Martin K. Petersen Signed-off-by: Christoph Hellwig --- drivers/scsi/megaraid/megaraid_sas_base.c | 24 ++++++++++----------- drivers/scsi/megaraid/megaraid_sas_fp.c | 14 ++++++------ drivers/scsi/megaraid/megaraid_sas_fusion.c | 7 +++--- drivers/scsi/megaraid/megaraid_sas_fusion.h | 9 ++------ 4 files changed, 24 insertions(+), 30 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index ff283d23788a..401ed67cf4c1 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3547,7 +3547,6 @@ static int megasas_create_frame_pool(struct megasas_instance *instance) int i; u32 max_cmd; u32 sge_sz; - u32 sgl_sz; u32 total_sz; u32 frame_count; struct megasas_cmd *cmd; @@ -3566,24 +3565,23 @@ static int megasas_create_frame_pool(struct megasas_instance *instance) } /* - * Calculated the number of 64byte frames required for SGL + * For MFI controllers. + * max_num_sge = 60 + * max_sge_sz = 16 byte (sizeof megasas_sge_skinny) + * Total 960 byte (15 MFI frame of 64 byte) + * + * Fusion adapter require only 3 extra frame. + * max_num_sge = 16 (defined as MAX_IOCTL_SGE) + * max_sge_sz = 12 byte (sizeof megasas_sge64) + * Total 192 byte (3 MFI frame of 64 byte) */ - sgl_sz = sge_sz * instance->max_num_sge; - frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; - frame_count = 15; - - /* - * We need one extra frame for the MFI command - */ - frame_count++; - + frame_count = instance->ctrl_context ? (3 + 1) : (15 + 1); total_sz = MEGAMFI_FRAME_SIZE * frame_count; /* * Use DMA pool facility provided by PCI layer */ instance->frame_dma_pool = pci_pool_create("megasas frame pool", - instance->pdev, total_sz, 64, - 0); + instance->pdev, total_sz, 256, 0); if (!instance->frame_dma_pool) { printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index 460c6a3d4ade..7cae1c25c9a9 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fp.c +++ b/drivers/scsi/megaraid/megaraid_sas_fp.c @@ -172,6 +172,7 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance) struct MR_FW_RAID_MAP_ALL *fw_map_old = NULL; struct MR_FW_RAID_MAP *pFwRaidMap = NULL; int i; + u16 ld_count; struct MR_DRV_RAID_MAP_ALL *drv_map = @@ -191,9 +192,10 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance) fw_map_old = (struct MR_FW_RAID_MAP_ALL *) fusion->ld_map[(instance->map_id & 1)]; pFwRaidMap = &fw_map_old->raidMap; + ld_count = (u16)le32_to_cpu(pFwRaidMap->ldCount); #if VD_EXT_DEBUG - for (i = 0; i < le16_to_cpu(pFwRaidMap->ldCount); i++) { + for (i = 0; i < ld_count; i++) { dev_dbg(&instance->pdev->dev, "(%d) :Index 0x%x " "Target Id 0x%x Seq Num 0x%x Size 0/%llx\n", instance->unique_id, i, @@ -205,12 +207,12 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance) memset(drv_map, 0, fusion->drv_map_sz); pDrvRaidMap->totalSize = pFwRaidMap->totalSize; - pDrvRaidMap->ldCount = (__le16)pFwRaidMap->ldCount; + pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); pDrvRaidMap->fpPdIoTimeoutSec = pFwRaidMap->fpPdIoTimeoutSec; for (i = 0; i < MAX_RAIDMAP_LOGICAL_DRIVES + MAX_RAIDMAP_VIEWS; i++) pDrvRaidMap->ldTgtIdToLd[i] = (u8)pFwRaidMap->ldTgtIdToLd[i]; - for (i = 0; i < le16_to_cpu(pDrvRaidMap->ldCount); i++) { + for (i = 0; i < ld_count; i++) { pDrvRaidMap->ldSpanMap[i] = pFwRaidMap->ldSpanMap[i]; #if VD_EXT_DEBUG dev_dbg(&instance->pdev->dev, @@ -252,7 +254,7 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance) struct LD_LOAD_BALANCE_INFO *lbInfo; PLD_SPAN_INFO ldSpanInfo; struct MR_LD_RAID *raid; - int ldCount, num_lds; + u16 ldCount, num_lds; u16 ld; u32 expected_size; @@ -356,7 +358,7 @@ static int getSpanInfo(struct MR_DRV_RAID_MAP_ALL *map, for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { ld = MR_TargetIdToLdGet(ldCount, map); - if (ld >= MAX_LOGICAL_DRIVES_EXT) + if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) continue; raid = MR_LdRaidGet(ld, map); dev_dbg(&instance->pdev->dev, "LD %x: span_depth=%x\n", @@ -1157,7 +1159,7 @@ void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { ld = MR_TargetIdToLdGet(ldCount, map); - if (ld >= MAX_LOGICAL_DRIVES_EXT) + if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) continue; raid = MR_LdRaidGet(ld, map); for (element = 0; element < MAX_QUAD_DEPTH; element++) { diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 71557f64bb5e..b5362c196000 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -698,12 +698,11 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) cpu_to_le32(lower_32_bits(ioc_init_handle)); init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST)); - req_desc.Words = 0; + req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr)); + req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr)); req_desc.MFAIo.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_MFA << - MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); - cpu_to_le32s((u32 *)&req_desc.MFAIo); - req_desc.Words |= cpu_to_le64(cmd->frame_phys_addr); + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); /* * disable the intr before firing the init frame diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 5ab7daee11be..56e6db2d5874 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -306,14 +306,9 @@ struct MPI2_RAID_SCSI_IO_REQUEST { * MPT RAID MFA IO Descriptor. */ struct MEGASAS_RAID_MFA_IO_REQUEST_DESCRIPTOR { -#if defined(__BIG_ENDIAN_BITFIELD) - u32 MessageAddress1:24; /* bits 31:8*/ u32 RequestFlags:8; -#else - u32 RequestFlags:8; - u32 MessageAddress1:24; /* bits 31:8*/ -#endif - u32 MessageAddress2; /* bits 61:32 */ + u32 MessageAddress1:24; + u32 MessageAddress2; }; /* Default Request Descriptor */