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1421 lines
42 KiB
1421 lines
42 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Linux MegaRAID driver for SAS based RAID controllers |
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* |
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* Copyright (c) 2009-2013 LSI Corporation |
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* Copyright (c) 2013-2016 Avago Technologies |
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* Copyright (c) 2016-2018 Broadcom Inc. |
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* |
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* FILE: megaraid_sas_fp.c |
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* |
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* Authors: Broadcom Inc. |
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* Sumant Patro |
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* Varad Talamacki |
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* Manoj Jose |
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* Kashyap Desai <[email protected]> |
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* Sumit Saxena <[email protected]> |
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* |
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* Send feedback to: [email protected] |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/pci.h> |
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#include <linux/list.h> |
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#include <linux/moduleparam.h> |
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#include <linux/module.h> |
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#include <linux/spinlock.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/uio.h> |
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#include <linux/uaccess.h> |
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#include <linux/fs.h> |
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#include <linux/compat.h> |
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#include <linux/blkdev.h> |
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#include <linux/poll.h> |
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#include <linux/irq_poll.h> |
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#include <scsi/scsi.h> |
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#include <scsi/scsi_cmnd.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_host.h> |
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#include "megaraid_sas_fusion.h" |
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#include "megaraid_sas.h" |
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#include <asm/div64.h> |
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#define LB_PENDING_CMDS_DEFAULT 4 |
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static unsigned int lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; |
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module_param(lb_pending_cmds, int, 0444); |
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MODULE_PARM_DESC(lb_pending_cmds, "Change raid-1 load balancing outstanding " |
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"threshold. Valid Values are 1-128. Default: 4"); |
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#define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a))) |
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#define MR_LD_STATE_OPTIMAL 3 |
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#define SPAN_ROW_SIZE(map, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowSize) |
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#define SPAN_ROW_DATA_SIZE(map_, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize) |
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#define SPAN_INVALID 0xff |
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/* Prototypes */ |
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static void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, |
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PLD_SPAN_INFO ldSpanInfo); |
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static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, |
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u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, |
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struct RAID_CONTEXT *pRAID_Context, struct MR_DRV_RAID_MAP_ALL *map); |
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static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, |
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u64 strip, struct MR_DRV_RAID_MAP_ALL *map); |
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u32 mega_mod64(u64 dividend, u32 divisor) |
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{ |
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u64 d; |
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u32 remainder; |
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if (!divisor) |
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printk(KERN_ERR "megasas : DIVISOR is zero, in div fn\n"); |
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d = dividend; |
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remainder = do_div(d, divisor); |
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return remainder; |
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} |
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/** |
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* mega_div64_32 - Do a 64-bit division |
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* @dividend: Dividend |
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* @divisor: Divisor |
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* |
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* @return quotient |
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**/ |
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static u64 mega_div64_32(uint64_t dividend, uint32_t divisor) |
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{ |
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u64 d = dividend; |
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if (!divisor) |
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printk(KERN_ERR "megasas : DIVISOR is zero in mod fn\n"); |
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do_div(d, divisor); |
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return d; |
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} |
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struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return &map->raidMap.ldSpanMap[ld].ldRaid; |
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} |
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static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld, |
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struct MR_DRV_RAID_MAP_ALL |
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*map) |
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{ |
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return &map->raidMap.ldSpanMap[ld].spanBlock[0]; |
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} |
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static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx]; |
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} |
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u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return le16_to_cpu(map->raidMap.arMapInfo[ar].pd[arm]); |
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} |
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u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return le16_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef); |
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} |
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__le16 MR_PdDevHandleGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return map->raidMap.devHndlInfo[pd].curDevHdl; |
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} |
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static u8 MR_PdInterfaceTypeGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return map->raidMap.devHndlInfo[pd].interfaceType; |
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} |
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u16 MR_GetLDTgtId(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return le16_to_cpu(map->raidMap.ldSpanMap[ld].ldRaid.targetId); |
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} |
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u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return map->raidMap.ldTgtIdToLd[ldTgtId]; |
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} |
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static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span, |
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struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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return &map->raidMap.ldSpanMap[ld].spanBlock[span].span; |
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} |
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/* |
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* This function will Populate Driver Map using firmware raid map |
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*/ |
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static int MR_PopulateDrvRaidMap(struct megasas_instance *instance, u64 map_id) |
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{ |
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struct fusion_context *fusion = instance->ctrl_context; |
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struct MR_FW_RAID_MAP_ALL *fw_map_old = NULL; |
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struct MR_FW_RAID_MAP *pFwRaidMap = NULL; |
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int i, j; |
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u16 ld_count; |
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struct MR_FW_RAID_MAP_DYNAMIC *fw_map_dyn; |
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struct MR_FW_RAID_MAP_EXT *fw_map_ext; |
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struct MR_RAID_MAP_DESC_TABLE *desc_table; |
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struct MR_DRV_RAID_MAP_ALL *drv_map = |
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fusion->ld_drv_map[(map_id & 1)]; |
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struct MR_DRV_RAID_MAP *pDrvRaidMap = &drv_map->raidMap; |
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void *raid_map_data = NULL; |
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memset(drv_map, 0, fusion->drv_map_sz); |
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memset(pDrvRaidMap->ldTgtIdToLd, |
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0xff, (sizeof(u16) * MAX_LOGICAL_DRIVES_DYN)); |
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if (instance->max_raid_mapsize) { |
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fw_map_dyn = fusion->ld_map[(map_id & 1)]; |
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desc_table = |
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(struct MR_RAID_MAP_DESC_TABLE *)((void *)fw_map_dyn + le32_to_cpu(fw_map_dyn->desc_table_offset)); |
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if (desc_table != fw_map_dyn->raid_map_desc_table) |
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dev_dbg(&instance->pdev->dev, "offsets of desc table are not matching desc %p original %p\n", |
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desc_table, fw_map_dyn->raid_map_desc_table); |
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ld_count = (u16)le16_to_cpu(fw_map_dyn->ld_count); |
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pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); |
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pDrvRaidMap->fpPdIoTimeoutSec = |
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fw_map_dyn->fp_pd_io_timeout_sec; |
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pDrvRaidMap->totalSize = |
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cpu_to_le32(sizeof(struct MR_DRV_RAID_MAP_ALL)); |
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/* point to actual data starting point*/ |
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raid_map_data = (void *)fw_map_dyn + |
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le32_to_cpu(fw_map_dyn->desc_table_offset) + |
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le32_to_cpu(fw_map_dyn->desc_table_size); |
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for (i = 0; i < le32_to_cpu(fw_map_dyn->desc_table_num_elements); ++i) { |
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switch (le32_to_cpu(desc_table->raid_map_desc_type)) { |
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case RAID_MAP_DESC_TYPE_DEVHDL_INFO: |
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fw_map_dyn->dev_hndl_info = |
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(struct MR_DEV_HANDLE_INFO *)(raid_map_data + le32_to_cpu(desc_table->raid_map_desc_offset)); |
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memcpy(pDrvRaidMap->devHndlInfo, |
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fw_map_dyn->dev_hndl_info, |
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sizeof(struct MR_DEV_HANDLE_INFO) * |
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le32_to_cpu(desc_table->raid_map_desc_elements)); |
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break; |
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case RAID_MAP_DESC_TYPE_TGTID_INFO: |
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fw_map_dyn->ld_tgt_id_to_ld = |
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(u16 *)(raid_map_data + |
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le32_to_cpu(desc_table->raid_map_desc_offset)); |
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for (j = 0; j < le32_to_cpu(desc_table->raid_map_desc_elements); j++) { |
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pDrvRaidMap->ldTgtIdToLd[j] = |
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le16_to_cpu(fw_map_dyn->ld_tgt_id_to_ld[j]); |
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} |
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break; |
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case RAID_MAP_DESC_TYPE_ARRAY_INFO: |
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fw_map_dyn->ar_map_info = |
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(struct MR_ARRAY_INFO *) |
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(raid_map_data + le32_to_cpu(desc_table->raid_map_desc_offset)); |
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memcpy(pDrvRaidMap->arMapInfo, |
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fw_map_dyn->ar_map_info, |
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sizeof(struct MR_ARRAY_INFO) * |
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le32_to_cpu(desc_table->raid_map_desc_elements)); |
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break; |
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case RAID_MAP_DESC_TYPE_SPAN_INFO: |
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fw_map_dyn->ld_span_map = |
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(struct MR_LD_SPAN_MAP *) |
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(raid_map_data + |
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le32_to_cpu(desc_table->raid_map_desc_offset)); |
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memcpy(pDrvRaidMap->ldSpanMap, |
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fw_map_dyn->ld_span_map, |
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sizeof(struct MR_LD_SPAN_MAP) * |
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le32_to_cpu(desc_table->raid_map_desc_elements)); |
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break; |
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default: |
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dev_dbg(&instance->pdev->dev, "wrong number of desctableElements %d\n", |
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fw_map_dyn->desc_table_num_elements); |
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} |
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++desc_table; |
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} |
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} else if (instance->supportmax256vd) { |
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fw_map_ext = |
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(struct MR_FW_RAID_MAP_EXT *)fusion->ld_map[(map_id & 1)]; |
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ld_count = (u16)le16_to_cpu(fw_map_ext->ldCount); |
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if (ld_count > MAX_LOGICAL_DRIVES_EXT) { |
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dev_dbg(&instance->pdev->dev, "megaraid_sas: LD count exposed in RAID map in not valid\n"); |
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return 1; |
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} |
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pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); |
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pDrvRaidMap->fpPdIoTimeoutSec = fw_map_ext->fpPdIoTimeoutSec; |
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for (i = 0; i < (MAX_LOGICAL_DRIVES_EXT); i++) |
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pDrvRaidMap->ldTgtIdToLd[i] = |
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(u16)fw_map_ext->ldTgtIdToLd[i]; |
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memcpy(pDrvRaidMap->ldSpanMap, fw_map_ext->ldSpanMap, |
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sizeof(struct MR_LD_SPAN_MAP) * ld_count); |
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memcpy(pDrvRaidMap->arMapInfo, fw_map_ext->arMapInfo, |
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sizeof(struct MR_ARRAY_INFO) * MAX_API_ARRAYS_EXT); |
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memcpy(pDrvRaidMap->devHndlInfo, fw_map_ext->devHndlInfo, |
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sizeof(struct MR_DEV_HANDLE_INFO) * |
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MAX_RAIDMAP_PHYSICAL_DEVICES); |
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/* New Raid map will not set totalSize, so keep expected value |
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* for legacy code in ValidateMapInfo |
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*/ |
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pDrvRaidMap->totalSize = |
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cpu_to_le32(sizeof(struct MR_FW_RAID_MAP_EXT)); |
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} else { |
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fw_map_old = (struct MR_FW_RAID_MAP_ALL *) |
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fusion->ld_map[(map_id & 1)]; |
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pFwRaidMap = &fw_map_old->raidMap; |
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ld_count = (u16)le32_to_cpu(pFwRaidMap->ldCount); |
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if (ld_count > MAX_LOGICAL_DRIVES) { |
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dev_dbg(&instance->pdev->dev, |
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"LD count exposed in RAID map in not valid\n"); |
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return 1; |
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} |
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pDrvRaidMap->totalSize = pFwRaidMap->totalSize; |
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pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count); |
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pDrvRaidMap->fpPdIoTimeoutSec = pFwRaidMap->fpPdIoTimeoutSec; |
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for (i = 0; i < MAX_RAIDMAP_LOGICAL_DRIVES + MAX_RAIDMAP_VIEWS; i++) |
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pDrvRaidMap->ldTgtIdToLd[i] = |
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(u8)pFwRaidMap->ldTgtIdToLd[i]; |
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for (i = 0; i < ld_count; i++) { |
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pDrvRaidMap->ldSpanMap[i] = pFwRaidMap->ldSpanMap[i]; |
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} |
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memcpy(pDrvRaidMap->arMapInfo, pFwRaidMap->arMapInfo, |
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sizeof(struct MR_ARRAY_INFO) * MAX_RAIDMAP_ARRAYS); |
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memcpy(pDrvRaidMap->devHndlInfo, pFwRaidMap->devHndlInfo, |
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sizeof(struct MR_DEV_HANDLE_INFO) * |
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MAX_RAIDMAP_PHYSICAL_DEVICES); |
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} |
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return 0; |
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} |
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/* |
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* This function will validate Map info data provided by FW |
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*/ |
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u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) |
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{ |
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struct fusion_context *fusion; |
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struct MR_DRV_RAID_MAP_ALL *drv_map; |
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struct MR_DRV_RAID_MAP *pDrvRaidMap; |
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struct LD_LOAD_BALANCE_INFO *lbInfo; |
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PLD_SPAN_INFO ldSpanInfo; |
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struct MR_LD_RAID *raid; |
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u16 num_lds, i; |
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u16 ld; |
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u32 expected_size; |
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if (MR_PopulateDrvRaidMap(instance, map_id)) |
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return 0; |
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fusion = instance->ctrl_context; |
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drv_map = fusion->ld_drv_map[(map_id & 1)]; |
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pDrvRaidMap = &drv_map->raidMap; |
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lbInfo = fusion->load_balance_info; |
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ldSpanInfo = fusion->log_to_span; |
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if (instance->max_raid_mapsize) |
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expected_size = sizeof(struct MR_DRV_RAID_MAP_ALL); |
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else if (instance->supportmax256vd) |
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expected_size = sizeof(struct MR_FW_RAID_MAP_EXT); |
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else |
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expected_size = |
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(sizeof(struct MR_FW_RAID_MAP) - sizeof(struct MR_LD_SPAN_MAP) + |
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(sizeof(struct MR_LD_SPAN_MAP) * le16_to_cpu(pDrvRaidMap->ldCount))); |
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if (le32_to_cpu(pDrvRaidMap->totalSize) != expected_size) { |
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dev_dbg(&instance->pdev->dev, "megasas: map info structure size 0x%x", |
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le32_to_cpu(pDrvRaidMap->totalSize)); |
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dev_dbg(&instance->pdev->dev, "is not matching expected size 0x%x\n", |
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(unsigned int)expected_size); |
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dev_err(&instance->pdev->dev, "megasas: span map %x, pDrvRaidMap->totalSize : %x\n", |
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(unsigned int)sizeof(struct MR_LD_SPAN_MAP), |
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le32_to_cpu(pDrvRaidMap->totalSize)); |
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return 0; |
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} |
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if (instance->UnevenSpanSupport) |
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mr_update_span_set(drv_map, ldSpanInfo); |
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if (lbInfo) |
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mr_update_load_balance_params(drv_map, lbInfo); |
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num_lds = le16_to_cpu(drv_map->raidMap.ldCount); |
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|
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/*Convert Raid capability values to CPU arch */ |
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for (i = 0; (num_lds > 0) && (i < MAX_LOGICAL_DRIVES_EXT); i++) { |
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ld = MR_TargetIdToLdGet(i, drv_map); |
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/* For non existing VDs, iterate to next VD*/ |
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if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) |
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continue; |
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raid = MR_LdRaidGet(ld, drv_map); |
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le32_to_cpus((u32 *)&raid->capability); |
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num_lds--; |
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} |
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return 1; |
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} |
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static u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk, |
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struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map); |
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struct MR_QUAD_ELEMENT *quad; |
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
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u32 span, j; |
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for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) { |
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for (j = 0; j < le32_to_cpu(pSpanBlock->block_span_info.noElements); j++) { |
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quad = &pSpanBlock->block_span_info.quad[j]; |
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|
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if (le32_to_cpu(quad->diff) == 0) |
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return SPAN_INVALID; |
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if (le64_to_cpu(quad->logStart) <= row && row <= |
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le64_to_cpu(quad->logEnd) && (mega_mod64(row - le64_to_cpu(quad->logStart), |
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le32_to_cpu(quad->diff))) == 0) { |
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if (span_blk != NULL) { |
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u64 blk; |
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blk = mega_div64_32((row-le64_to_cpu(quad->logStart)), le32_to_cpu(quad->diff)); |
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|
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blk = (blk + le64_to_cpu(quad->offsetInSpan)) << raid->stripeShift; |
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*span_blk = blk; |
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} |
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return span; |
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} |
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} |
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} |
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return SPAN_INVALID; |
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} |
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|
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/* |
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****************************************************************************** |
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* |
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* This routine calculates the Span block for given row using spanset. |
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* |
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* Inputs : |
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* instance - HBA instance |
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* ld - Logical drive number |
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* row - Row number |
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* map - LD map |
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* |
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* Outputs : |
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* |
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* span - Span number |
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* block - Absolute Block number in the physical disk |
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* div_error - Devide error code. |
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*/ |
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|
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static u32 mr_spanset_get_span_block(struct megasas_instance *instance, |
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u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL *map) |
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{ |
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struct fusion_context *fusion = instance->ctrl_context; |
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
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LD_SPAN_SET *span_set; |
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struct MR_QUAD_ELEMENT *quad; |
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u32 span, info; |
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PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
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|
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for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
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span_set = &(ldSpanInfo[ld].span_set[info]); |
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|
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if (span_set->span_row_data_width == 0) |
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break; |
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|
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if (row > span_set->data_row_end) |
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continue; |
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|
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for (span = 0; span < raid->spanDepth; span++) |
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if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
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block_span_info.noElements) >= info+1) { |
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quad = &map->raidMap.ldSpanMap[ld]. |
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spanBlock[span]. |
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block_span_info.quad[info]; |
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if (le32_to_cpu(quad->diff) == 0) |
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return SPAN_INVALID; |
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if (le64_to_cpu(quad->logStart) <= row && |
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row <= le64_to_cpu(quad->logEnd) && |
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(mega_mod64(row - le64_to_cpu(quad->logStart), |
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le32_to_cpu(quad->diff))) == 0) { |
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if (span_blk != NULL) { |
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u64 blk; |
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blk = mega_div64_32 |
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((row - le64_to_cpu(quad->logStart)), |
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le32_to_cpu(quad->diff)); |
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blk = (blk + le64_to_cpu(quad->offsetInSpan)) |
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<< raid->stripeShift; |
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*span_blk = blk; |
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} |
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return span; |
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} |
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} |
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} |
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return SPAN_INVALID; |
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} |
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|
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/* |
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****************************************************************************** |
|
* |
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* This routine calculates the row for given strip using spanset. |
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* |
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* Inputs : |
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* instance - HBA instance |
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* ld - Logical drive number |
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* Strip - Strip |
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* map - LD map |
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* |
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* Outputs : |
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* |
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* row - row associated with strip |
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*/ |
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|
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static u64 get_row_from_strip(struct megasas_instance *instance, |
|
u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct fusion_context *fusion = instance->ctrl_context; |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
LD_SPAN_SET *span_set; |
|
PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
|
u32 info, strip_offset, span, span_offset; |
|
u64 span_set_Strip, span_set_Row, retval; |
|
|
|
for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
|
span_set = &(ldSpanInfo[ld].span_set[info]); |
|
|
|
if (span_set->span_row_data_width == 0) |
|
break; |
|
if (strip > span_set->data_strip_end) |
|
continue; |
|
|
|
span_set_Strip = strip - span_set->data_strip_start; |
|
strip_offset = mega_mod64(span_set_Strip, |
|
span_set->span_row_data_width); |
|
span_set_Row = mega_div64_32(span_set_Strip, |
|
span_set->span_row_data_width) * span_set->diff; |
|
for (span = 0, span_offset = 0; span < raid->spanDepth; span++) |
|
if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
|
block_span_info.noElements) >= info+1) { |
|
if (strip_offset >= |
|
span_set->strip_offset[span]) |
|
span_offset++; |
|
else |
|
break; |
|
} |
|
|
|
retval = (span_set->data_row_start + span_set_Row + |
|
(span_offset - 1)); |
|
return retval; |
|
} |
|
return -1LLU; |
|
} |
|
|
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* This routine calculates the Start Strip for given row using spanset. |
|
* |
|
* Inputs : |
|
* instance - HBA instance |
|
* ld - Logical drive number |
|
* row - Row number |
|
* map - LD map |
|
* |
|
* Outputs : |
|
* |
|
* Strip - Start strip associated with row |
|
*/ |
|
|
|
static u64 get_strip_from_row(struct megasas_instance *instance, |
|
u32 ld, u64 row, struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct fusion_context *fusion = instance->ctrl_context; |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
LD_SPAN_SET *span_set; |
|
struct MR_QUAD_ELEMENT *quad; |
|
PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
|
u32 span, info; |
|
u64 strip; |
|
|
|
for (info = 0; info < MAX_QUAD_DEPTH; info++) { |
|
span_set = &(ldSpanInfo[ld].span_set[info]); |
|
|
|
if (span_set->span_row_data_width == 0) |
|
break; |
|
if (row > span_set->data_row_end) |
|
continue; |
|
|
|
for (span = 0; span < raid->spanDepth; span++) |
|
if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
|
block_span_info.noElements) >= info+1) { |
|
quad = &map->raidMap.ldSpanMap[ld]. |
|
spanBlock[span].block_span_info.quad[info]; |
|
if (le64_to_cpu(quad->logStart) <= row && |
|
row <= le64_to_cpu(quad->logEnd) && |
|
mega_mod64((row - le64_to_cpu(quad->logStart)), |
|
le32_to_cpu(quad->diff)) == 0) { |
|
strip = mega_div64_32 |
|
(((row - span_set->data_row_start) |
|
- le64_to_cpu(quad->logStart)), |
|
le32_to_cpu(quad->diff)); |
|
strip *= span_set->span_row_data_width; |
|
strip += span_set->data_strip_start; |
|
strip += span_set->strip_offset[span]; |
|
return strip; |
|
} |
|
} |
|
} |
|
dev_err(&instance->pdev->dev, "get_strip_from_row" |
|
"returns invalid strip for ld=%x, row=%lx\n", |
|
ld, (long unsigned int)row); |
|
return -1; |
|
} |
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* This routine calculates the Physical Arm for given strip using spanset. |
|
* |
|
* Inputs : |
|
* instance - HBA instance |
|
* ld - Logical drive number |
|
* strip - Strip |
|
* map - LD map |
|
* |
|
* Outputs : |
|
* |
|
* Phys Arm - Phys Arm associated with strip |
|
*/ |
|
|
|
static u32 get_arm_from_strip(struct megasas_instance *instance, |
|
u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct fusion_context *fusion = instance->ctrl_context; |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
LD_SPAN_SET *span_set; |
|
PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span; |
|
u32 info, strip_offset, span, span_offset, retval; |
|
|
|
for (info = 0 ; info < MAX_QUAD_DEPTH; info++) { |
|
span_set = &(ldSpanInfo[ld].span_set[info]); |
|
|
|
if (span_set->span_row_data_width == 0) |
|
break; |
|
if (strip > span_set->data_strip_end) |
|
continue; |
|
|
|
strip_offset = (uint)mega_mod64 |
|
((strip - span_set->data_strip_start), |
|
span_set->span_row_data_width); |
|
|
|
for (span = 0, span_offset = 0; span < raid->spanDepth; span++) |
|
if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
|
block_span_info.noElements) >= info+1) { |
|
if (strip_offset >= |
|
span_set->strip_offset[span]) |
|
span_offset = |
|
span_set->strip_offset[span]; |
|
else |
|
break; |
|
} |
|
|
|
retval = (strip_offset - span_offset); |
|
return retval; |
|
} |
|
|
|
dev_err(&instance->pdev->dev, "get_arm_from_strip" |
|
"returns invalid arm for ld=%x strip=%lx\n", |
|
ld, (long unsigned int)strip); |
|
|
|
return -1; |
|
} |
|
|
|
/* This Function will return Phys arm */ |
|
static u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe, |
|
struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
/* Need to check correct default value */ |
|
u32 arm = 0; |
|
|
|
switch (raid->level) { |
|
case 0: |
|
case 5: |
|
case 6: |
|
arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span)); |
|
break; |
|
case 1: |
|
/* start with logical arm */ |
|
arm = get_arm_from_strip(instance, ld, stripe, map); |
|
if (arm != -1U) |
|
arm *= 2; |
|
break; |
|
} |
|
|
|
return arm; |
|
} |
|
|
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* This routine calculates the arm, span and block for the specified stripe and |
|
* reference in stripe using spanset |
|
* |
|
* Inputs : |
|
* |
|
* ld - Logical drive number |
|
* stripRow - Stripe number |
|
* stripRef - Reference in stripe |
|
* |
|
* Outputs : |
|
* |
|
* span - Span number |
|
* block - Absolute Block number in the physical disk |
|
*/ |
|
static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld, |
|
u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info, |
|
struct RAID_CONTEXT *pRAID_Context, |
|
struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
u32 pd, arRef, r1_alt_pd; |
|
u8 physArm, span; |
|
u64 row; |
|
u8 retval = true; |
|
u64 *pdBlock = &io_info->pdBlock; |
|
__le16 *pDevHandle = &io_info->devHandle; |
|
u8 *pPdInterface = &io_info->pd_interface; |
|
u32 logArm, rowMod, armQ, arm; |
|
|
|
*pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); |
|
|
|
/*Get row and span from io_info for Uneven Span IO.*/ |
|
row = io_info->start_row; |
|
span = io_info->start_span; |
|
|
|
|
|
if (raid->level == 6) { |
|
logArm = get_arm_from_strip(instance, ld, stripRow, map); |
|
if (logArm == -1U) |
|
return false; |
|
rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span)); |
|
armQ = SPAN_ROW_SIZE(map, ld, span) - 1 - rowMod; |
|
arm = armQ + 1 + logArm; |
|
if (arm >= SPAN_ROW_SIZE(map, ld, span)) |
|
arm -= SPAN_ROW_SIZE(map, ld, span); |
|
physArm = (u8)arm; |
|
} else |
|
/* Calculate the arm */ |
|
physArm = get_arm(instance, ld, span, stripRow, map); |
|
if (physArm == 0xFF) |
|
return false; |
|
|
|
arRef = MR_LdSpanArrayGet(ld, span, map); |
|
pd = MR_ArPdGet(arRef, physArm, map); |
|
|
|
if (pd != MR_PD_INVALID) { |
|
*pDevHandle = MR_PdDevHandleGet(pd, map); |
|
*pPdInterface = MR_PdInterfaceTypeGet(pd, map); |
|
/* get second pd also for raid 1/10 fast path writes*/ |
|
if ((instance->adapter_type >= VENTURA_SERIES) && |
|
(raid->level == 1) && |
|
!io_info->isRead) { |
|
r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); |
|
if (r1_alt_pd != MR_PD_INVALID) |
|
io_info->r1_alt_dev_handle = |
|
MR_PdDevHandleGet(r1_alt_pd, map); |
|
} |
|
} else { |
|
if ((raid->level >= 5) && |
|
((instance->adapter_type == THUNDERBOLT_SERIES) || |
|
((instance->adapter_type == INVADER_SERIES) && |
|
(raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) |
|
pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; |
|
else if (raid->level == 1) { |
|
physArm = physArm + 1; |
|
pd = MR_ArPdGet(arRef, physArm, map); |
|
if (pd != MR_PD_INVALID) { |
|
*pDevHandle = MR_PdDevHandleGet(pd, map); |
|
*pPdInterface = MR_PdInterfaceTypeGet(pd, map); |
|
} |
|
} |
|
} |
|
|
|
*pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); |
|
if (instance->adapter_type >= VENTURA_SERIES) { |
|
((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
io_info->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
} else { |
|
pRAID_Context->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
io_info->span_arm = pRAID_Context->span_arm; |
|
} |
|
io_info->pd_after_lb = pd; |
|
return retval; |
|
} |
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* This routine calculates the arm, span and block for the specified stripe and |
|
* reference in stripe. |
|
* |
|
* Inputs : |
|
* |
|
* ld - Logical drive number |
|
* stripRow - Stripe number |
|
* stripRef - Reference in stripe |
|
* |
|
* Outputs : |
|
* |
|
* span - Span number |
|
* block - Absolute Block number in the physical disk |
|
*/ |
|
static u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow, |
|
u16 stripRef, struct IO_REQUEST_INFO *io_info, |
|
struct RAID_CONTEXT *pRAID_Context, |
|
struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
u32 pd, arRef, r1_alt_pd; |
|
u8 physArm, span; |
|
u64 row; |
|
u8 retval = true; |
|
u64 *pdBlock = &io_info->pdBlock; |
|
__le16 *pDevHandle = &io_info->devHandle; |
|
u8 *pPdInterface = &io_info->pd_interface; |
|
|
|
*pDevHandle = cpu_to_le16(MR_DEVHANDLE_INVALID); |
|
|
|
row = mega_div64_32(stripRow, raid->rowDataSize); |
|
|
|
if (raid->level == 6) { |
|
/* logical arm within row */ |
|
u32 logArm = mega_mod64(stripRow, raid->rowDataSize); |
|
u32 rowMod, armQ, arm; |
|
|
|
if (raid->rowSize == 0) |
|
return false; |
|
/* get logical row mod */ |
|
rowMod = mega_mod64(row, raid->rowSize); |
|
armQ = raid->rowSize-1-rowMod; /* index of Q drive */ |
|
arm = armQ+1+logArm; /* data always logically follows Q */ |
|
if (arm >= raid->rowSize) /* handle wrap condition */ |
|
arm -= raid->rowSize; |
|
physArm = (u8)arm; |
|
} else { |
|
if (raid->modFactor == 0) |
|
return false; |
|
physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow, |
|
raid->modFactor), |
|
map); |
|
} |
|
|
|
if (raid->spanDepth == 1) { |
|
span = 0; |
|
*pdBlock = row << raid->stripeShift; |
|
} else { |
|
span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map); |
|
if (span == SPAN_INVALID) |
|
return false; |
|
} |
|
|
|
/* Get the array on which this span is present */ |
|
arRef = MR_LdSpanArrayGet(ld, span, map); |
|
pd = MR_ArPdGet(arRef, physArm, map); /* Get the pd */ |
|
|
|
if (pd != MR_PD_INVALID) { |
|
/* Get dev handle from Pd. */ |
|
*pDevHandle = MR_PdDevHandleGet(pd, map); |
|
*pPdInterface = MR_PdInterfaceTypeGet(pd, map); |
|
/* get second pd also for raid 1/10 fast path writes*/ |
|
if ((instance->adapter_type >= VENTURA_SERIES) && |
|
(raid->level == 1) && |
|
!io_info->isRead) { |
|
r1_alt_pd = MR_ArPdGet(arRef, physArm + 1, map); |
|
if (r1_alt_pd != MR_PD_INVALID) |
|
io_info->r1_alt_dev_handle = |
|
MR_PdDevHandleGet(r1_alt_pd, map); |
|
} |
|
} else { |
|
if ((raid->level >= 5) && |
|
((instance->adapter_type == THUNDERBOLT_SERIES) || |
|
((instance->adapter_type == INVADER_SERIES) && |
|
(raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))) |
|
pRAID_Context->reg_lock_flags = REGION_TYPE_EXCLUSIVE; |
|
else if (raid->level == 1) { |
|
/* Get alternate Pd. */ |
|
physArm = physArm + 1; |
|
pd = MR_ArPdGet(arRef, physArm, map); |
|
if (pd != MR_PD_INVALID) { |
|
/* Get dev handle from Pd */ |
|
*pDevHandle = MR_PdDevHandleGet(pd, map); |
|
*pPdInterface = MR_PdInterfaceTypeGet(pd, map); |
|
} |
|
} |
|
} |
|
|
|
*pdBlock += stripRef + le64_to_cpu(MR_LdSpanPtrGet(ld, span, map)->startBlk); |
|
if (instance->adapter_type >= VENTURA_SERIES) { |
|
((struct RAID_CONTEXT_G35 *)pRAID_Context)->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
io_info->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
} else { |
|
pRAID_Context->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | physArm; |
|
io_info->span_arm = pRAID_Context->span_arm; |
|
} |
|
io_info->pd_after_lb = pd; |
|
return retval; |
|
} |
|
|
|
/* |
|
* mr_get_phy_params_r56_rmw - Calculate parameters for R56 CTIO write operation |
|
* @instance: Adapter soft state |
|
* @ld: LD index |
|
* @stripNo: Strip Number |
|
* @io_info: IO info structure pointer |
|
* pRAID_Context: RAID context pointer |
|
* map: RAID map pointer |
|
* |
|
* This routine calculates the logical arm, data Arm, row number and parity arm |
|
* for R56 CTIO write operation. |
|
*/ |
|
static void mr_get_phy_params_r56_rmw(struct megasas_instance *instance, |
|
u32 ld, u64 stripNo, |
|
struct IO_REQUEST_INFO *io_info, |
|
struct RAID_CONTEXT_G35 *pRAID_Context, |
|
struct MR_DRV_RAID_MAP_ALL *map) |
|
{ |
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map); |
|
u8 span, dataArms, arms, dataArm, logArm; |
|
s8 rightmostParityArm, PParityArm; |
|
u64 rowNum; |
|
u64 *pdBlock = &io_info->pdBlock; |
|
|
|
dataArms = raid->rowDataSize; |
|
arms = raid->rowSize; |
|
|
|
rowNum = mega_div64_32(stripNo, dataArms); |
|
/* parity disk arm, first arm is 0 */ |
|
rightmostParityArm = (arms - 1) - mega_mod64(rowNum, arms); |
|
|
|
/* logical arm within row */ |
|
logArm = mega_mod64(stripNo, dataArms); |
|
/* physical arm for data */ |
|
dataArm = mega_mod64((rightmostParityArm + 1 + logArm), arms); |
|
|
|
if (raid->spanDepth == 1) { |
|
span = 0; |
|
} else { |
|
span = (u8)MR_GetSpanBlock(ld, rowNum, pdBlock, map); |
|
if (span == SPAN_INVALID) |
|
return; |
|
} |
|
|
|
if (raid->level == 6) { |
|
/* P Parity arm, note this can go negative adjust if negative */ |
|
PParityArm = (arms - 2) - mega_mod64(rowNum, arms); |
|
|
|
if (PParityArm < 0) |
|
PParityArm += arms; |
|
|
|
/* rightmostParityArm is P-Parity for RAID 5 and Q-Parity for RAID */ |
|
pRAID_Context->flow_specific.r56_arm_map = rightmostParityArm; |
|
pRAID_Context->flow_specific.r56_arm_map |= |
|
(u16)(PParityArm << RAID_CTX_R56_P_ARM_SHIFT); |
|
} else { |
|
pRAID_Context->flow_specific.r56_arm_map |= |
|
(u16)(rightmostParityArm << RAID_CTX_R56_P_ARM_SHIFT); |
|
} |
|
|
|
pRAID_Context->reg_lock_row_lba = cpu_to_le64(rowNum); |
|
pRAID_Context->flow_specific.r56_arm_map |= |
|
(u16)(logArm << RAID_CTX_R56_LOG_ARM_SHIFT); |
|
cpu_to_le16s(&pRAID_Context->flow_specific.r56_arm_map); |
|
pRAID_Context->span_arm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) | dataArm; |
|
pRAID_Context->raid_flags = (MR_RAID_FLAGS_IO_SUB_TYPE_R56_DIV_OFFLOAD << |
|
MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT); |
|
|
|
return; |
|
} |
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* MR_BuildRaidContext function |
|
* |
|
* This function will initiate command processing. The start/end row and strip |
|
* information is calculated then the lock is acquired. |
|
* This function will return 0 if region lock was acquired OR return num strips |
|
*/ |
|
u8 |
|
MR_BuildRaidContext(struct megasas_instance *instance, |
|
struct IO_REQUEST_INFO *io_info, |
|
struct RAID_CONTEXT *pRAID_Context, |
|
struct MR_DRV_RAID_MAP_ALL *map, u8 **raidLUN) |
|
{ |
|
struct fusion_context *fusion; |
|
struct MR_LD_RAID *raid; |
|
u32 stripSize, stripe_mask; |
|
u64 endLba, endStrip, endRow, start_row, start_strip; |
|
u64 regStart; |
|
u32 regSize; |
|
u8 num_strips, numRows; |
|
u16 ref_in_start_stripe, ref_in_end_stripe; |
|
u64 ldStartBlock; |
|
u32 numBlocks, ldTgtId; |
|
u8 isRead; |
|
u8 retval = 0; |
|
u8 startlba_span = SPAN_INVALID; |
|
u64 *pdBlock = &io_info->pdBlock; |
|
u16 ld; |
|
|
|
ldStartBlock = io_info->ldStartBlock; |
|
numBlocks = io_info->numBlocks; |
|
ldTgtId = io_info->ldTgtId; |
|
isRead = io_info->isRead; |
|
io_info->IoforUnevenSpan = 0; |
|
io_info->start_span = SPAN_INVALID; |
|
fusion = instance->ctrl_context; |
|
|
|
ld = MR_TargetIdToLdGet(ldTgtId, map); |
|
raid = MR_LdRaidGet(ld, map); |
|
/*check read ahead bit*/ |
|
io_info->ra_capable = raid->capability.ra_capable; |
|
|
|
/* |
|
* if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero |
|
* return FALSE |
|
*/ |
|
if (raid->rowDataSize == 0) { |
|
if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0) |
|
return false; |
|
else if (instance->UnevenSpanSupport) { |
|
io_info->IoforUnevenSpan = 1; |
|
} else { |
|
dev_info(&instance->pdev->dev, |
|
"raid->rowDataSize is 0, but has SPAN[0]" |
|
"rowDataSize = 0x%0x," |
|
"but there is _NO_ UnevenSpanSupport\n", |
|
MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize); |
|
return false; |
|
} |
|
} |
|
|
|
stripSize = 1 << raid->stripeShift; |
|
stripe_mask = stripSize-1; |
|
|
|
io_info->data_arms = raid->rowDataSize; |
|
|
|
/* |
|
* calculate starting row and stripe, and number of strips and rows |
|
*/ |
|
start_strip = ldStartBlock >> raid->stripeShift; |
|
ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask); |
|
endLba = ldStartBlock + numBlocks - 1; |
|
ref_in_end_stripe = (u16)(endLba & stripe_mask); |
|
endStrip = endLba >> raid->stripeShift; |
|
num_strips = (u8)(endStrip - start_strip + 1); /* End strip */ |
|
|
|
if (io_info->IoforUnevenSpan) { |
|
start_row = get_row_from_strip(instance, ld, start_strip, map); |
|
endRow = get_row_from_strip(instance, ld, endStrip, map); |
|
if (start_row == -1ULL || endRow == -1ULL) { |
|
dev_info(&instance->pdev->dev, "return from %s %d." |
|
"Send IO w/o region lock.\n", |
|
__func__, __LINE__); |
|
return false; |
|
} |
|
|
|
if (raid->spanDepth == 1) { |
|
startlba_span = 0; |
|
*pdBlock = start_row << raid->stripeShift; |
|
} else |
|
startlba_span = (u8)mr_spanset_get_span_block(instance, |
|
ld, start_row, pdBlock, map); |
|
if (startlba_span == SPAN_INVALID) { |
|
dev_info(&instance->pdev->dev, "return from %s %d" |
|
"for row 0x%llx,start strip %llx" |
|
"endSrip %llx\n", __func__, __LINE__, |
|
(unsigned long long)start_row, |
|
(unsigned long long)start_strip, |
|
(unsigned long long)endStrip); |
|
return false; |
|
} |
|
io_info->start_span = startlba_span; |
|
io_info->start_row = start_row; |
|
} else { |
|
start_row = mega_div64_32(start_strip, raid->rowDataSize); |
|
endRow = mega_div64_32(endStrip, raid->rowDataSize); |
|
} |
|
numRows = (u8)(endRow - start_row + 1); |
|
|
|
/* |
|
* calculate region info. |
|
*/ |
|
|
|
/* assume region is at the start of the first row */ |
|
regStart = start_row << raid->stripeShift; |
|
/* assume this IO needs the full row - we'll adjust if not true */ |
|
regSize = stripSize; |
|
|
|
io_info->do_fp_rlbypass = raid->capability.fpBypassRegionLock; |
|
|
|
/* Check if we can send this I/O via FastPath */ |
|
if (raid->capability.fpCapable) { |
|
if (isRead) |
|
io_info->fpOkForIo = (raid->capability.fpReadCapable && |
|
((num_strips == 1) || |
|
raid->capability. |
|
fpReadAcrossStripe)); |
|
else |
|
io_info->fpOkForIo = (raid->capability.fpWriteCapable && |
|
((num_strips == 1) || |
|
raid->capability. |
|
fpWriteAcrossStripe)); |
|
} else |
|
io_info->fpOkForIo = false; |
|
|
|
if (numRows == 1) { |
|
/* single-strip IOs can always lock only the data needed */ |
|
if (num_strips == 1) { |
|
regStart += ref_in_start_stripe; |
|
regSize = numBlocks; |
|
} |
|
/* multi-strip IOs always need to full stripe locked */ |
|
} else if (io_info->IoforUnevenSpan == 0) { |
|
/* |
|
* For Even span region lock optimization. |
|
* If the start strip is the last in the start row |
|
*/ |
|
if (start_strip == (start_row + 1) * raid->rowDataSize - 1) { |
|
regStart += ref_in_start_stripe; |
|
/* initialize count to sectors from startref to end |
|
of strip */ |
|
regSize = stripSize - ref_in_start_stripe; |
|
} |
|
|
|
/* add complete rows in the middle of the transfer */ |
|
if (numRows > 2) |
|
regSize += (numRows-2) << raid->stripeShift; |
|
|
|
/* if IO ends within first strip of last row*/ |
|
if (endStrip == endRow*raid->rowDataSize) |
|
regSize += ref_in_end_stripe+1; |
|
else |
|
regSize += stripSize; |
|
} else { |
|
/* |
|
* For Uneven span region lock optimization. |
|
* If the start strip is the last in the start row |
|
*/ |
|
if (start_strip == (get_strip_from_row(instance, ld, start_row, map) + |
|
SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) { |
|
regStart += ref_in_start_stripe; |
|
/* initialize count to sectors from |
|
* startRef to end of strip |
|
*/ |
|
regSize = stripSize - ref_in_start_stripe; |
|
} |
|
/* Add complete rows in the middle of the transfer*/ |
|
|
|
if (numRows > 2) |
|
/* Add complete rows in the middle of the transfer*/ |
|
regSize += (numRows-2) << raid->stripeShift; |
|
|
|
/* if IO ends within first strip of last row */ |
|
if (endStrip == get_strip_from_row(instance, ld, endRow, map)) |
|
regSize += ref_in_end_stripe + 1; |
|
else |
|
regSize += stripSize; |
|
} |
|
|
|
pRAID_Context->timeout_value = |
|
cpu_to_le16(raid->fpIoTimeoutForLd ? |
|
raid->fpIoTimeoutForLd : |
|
map->raidMap.fpPdIoTimeoutSec); |
|
if (instance->adapter_type == INVADER_SERIES) |
|
pRAID_Context->reg_lock_flags = (isRead) ? |
|
raid->regTypeReqOnRead : raid->regTypeReqOnWrite; |
|
else if (instance->adapter_type == THUNDERBOLT_SERIES) |
|
pRAID_Context->reg_lock_flags = (isRead) ? |
|
REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite; |
|
pRAID_Context->virtual_disk_tgt_id = raid->targetId; |
|
pRAID_Context->reg_lock_row_lba = cpu_to_le64(regStart); |
|
pRAID_Context->reg_lock_length = cpu_to_le32(regSize); |
|
pRAID_Context->config_seq_num = raid->seqNum; |
|
/* save pointer to raid->LUN array */ |
|
*raidLUN = raid->LUN; |
|
|
|
/* Aero R5/6 Division Offload for WRITE */ |
|
if (fusion->r56_div_offload && (raid->level >= 5) && !isRead) { |
|
mr_get_phy_params_r56_rmw(instance, ld, start_strip, io_info, |
|
(struct RAID_CONTEXT_G35 *)pRAID_Context, |
|
map); |
|
return true; |
|
} |
|
|
|
/*Get Phy Params only if FP capable, or else leave it to MR firmware |
|
to do the calculation.*/ |
|
if (io_info->fpOkForIo) { |
|
retval = io_info->IoforUnevenSpan ? |
|
mr_spanset_get_phy_params(instance, ld, |
|
start_strip, ref_in_start_stripe, |
|
io_info, pRAID_Context, map) : |
|
MR_GetPhyParams(instance, ld, start_strip, |
|
ref_in_start_stripe, io_info, |
|
pRAID_Context, map); |
|
/* If IO on an invalid Pd, then FP is not possible.*/ |
|
if (io_info->devHandle == MR_DEVHANDLE_INVALID) |
|
io_info->fpOkForIo = false; |
|
return retval; |
|
} else if (isRead) { |
|
uint stripIdx; |
|
for (stripIdx = 0; stripIdx < num_strips; stripIdx++) { |
|
retval = io_info->IoforUnevenSpan ? |
|
mr_spanset_get_phy_params(instance, ld, |
|
start_strip + stripIdx, |
|
ref_in_start_stripe, io_info, |
|
pRAID_Context, map) : |
|
MR_GetPhyParams(instance, ld, |
|
start_strip + stripIdx, ref_in_start_stripe, |
|
io_info, pRAID_Context, map); |
|
if (!retval) |
|
return true; |
|
} |
|
} |
|
return true; |
|
} |
|
|
|
/* |
|
****************************************************************************** |
|
* |
|
* This routine pepare spanset info from Valid Raid map and store it into |
|
* local copy of ldSpanInfo per instance data structure. |
|
* |
|
* Inputs : |
|
* map - LD map |
|
* ldSpanInfo - ldSpanInfo per HBA instance |
|
* |
|
*/ |
|
void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, |
|
PLD_SPAN_INFO ldSpanInfo) |
|
{ |
|
u8 span, count; |
|
u32 element, span_row_width; |
|
u64 span_row; |
|
struct MR_LD_RAID *raid; |
|
LD_SPAN_SET *span_set, *span_set_prev; |
|
struct MR_QUAD_ELEMENT *quad; |
|
int ldCount; |
|
u16 ld; |
|
|
|
|
|
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { |
|
ld = MR_TargetIdToLdGet(ldCount, map); |
|
if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1)) |
|
continue; |
|
raid = MR_LdRaidGet(ld, map); |
|
for (element = 0; element < MAX_QUAD_DEPTH; element++) { |
|
for (span = 0; span < raid->spanDepth; span++) { |
|
if (le32_to_cpu(map->raidMap.ldSpanMap[ld].spanBlock[span]. |
|
block_span_info.noElements) < |
|
element + 1) |
|
continue; |
|
span_set = &(ldSpanInfo[ld].span_set[element]); |
|
quad = &map->raidMap.ldSpanMap[ld]. |
|
spanBlock[span].block_span_info. |
|
quad[element]; |
|
|
|
span_set->diff = le32_to_cpu(quad->diff); |
|
|
|
for (count = 0, span_row_width = 0; |
|
count < raid->spanDepth; count++) { |
|
if (le32_to_cpu(map->raidMap.ldSpanMap[ld]. |
|
spanBlock[count]. |
|
block_span_info. |
|
noElements) >= element + 1) { |
|
span_set->strip_offset[count] = |
|
span_row_width; |
|
span_row_width += |
|
MR_LdSpanPtrGet |
|
(ld, count, map)->spanRowDataSize; |
|
} |
|
} |
|
|
|
span_set->span_row_data_width = span_row_width; |
|
span_row = mega_div64_32(((le64_to_cpu(quad->logEnd) - |
|
le64_to_cpu(quad->logStart)) + le32_to_cpu(quad->diff)), |
|
le32_to_cpu(quad->diff)); |
|
|
|
if (element == 0) { |
|
span_set->log_start_lba = 0; |
|
span_set->log_end_lba = |
|
((span_row << raid->stripeShift) |
|
* span_row_width) - 1; |
|
|
|
span_set->span_row_start = 0; |
|
span_set->span_row_end = span_row - 1; |
|
|
|
span_set->data_strip_start = 0; |
|
span_set->data_strip_end = |
|
(span_row * span_row_width) - 1; |
|
|
|
span_set->data_row_start = 0; |
|
span_set->data_row_end = |
|
(span_row * le32_to_cpu(quad->diff)) - 1; |
|
} else { |
|
span_set_prev = &(ldSpanInfo[ld]. |
|
span_set[element - 1]); |
|
span_set->log_start_lba = |
|
span_set_prev->log_end_lba + 1; |
|
span_set->log_end_lba = |
|
span_set->log_start_lba + |
|
((span_row << raid->stripeShift) |
|
* span_row_width) - 1; |
|
|
|
span_set->span_row_start = |
|
span_set_prev->span_row_end + 1; |
|
span_set->span_row_end = |
|
span_set->span_row_start + span_row - 1; |
|
|
|
span_set->data_strip_start = |
|
span_set_prev->data_strip_end + 1; |
|
span_set->data_strip_end = |
|
span_set->data_strip_start + |
|
(span_row * span_row_width) - 1; |
|
|
|
span_set->data_row_start = |
|
span_set_prev->data_row_end + 1; |
|
span_set->data_row_end = |
|
span_set->data_row_start + |
|
(span_row * le32_to_cpu(quad->diff)) - 1; |
|
} |
|
break; |
|
} |
|
if (span == raid->spanDepth) |
|
break; |
|
} |
|
} |
|
} |
|
|
|
void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map, |
|
struct LD_LOAD_BALANCE_INFO *lbInfo) |
|
{ |
|
int ldCount; |
|
u16 ld; |
|
struct MR_LD_RAID *raid; |
|
|
|
if (lb_pending_cmds > 128 || lb_pending_cmds < 1) |
|
lb_pending_cmds = LB_PENDING_CMDS_DEFAULT; |
|
|
|
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { |
|
ld = MR_TargetIdToLdGet(ldCount, drv_map); |
|
if (ld >= MAX_LOGICAL_DRIVES_EXT - 1) { |
|
lbInfo[ldCount].loadBalanceFlag = 0; |
|
continue; |
|
} |
|
|
|
raid = MR_LdRaidGet(ld, drv_map); |
|
if ((raid->level != 1) || |
|
(raid->ldState != MR_LD_STATE_OPTIMAL)) { |
|
lbInfo[ldCount].loadBalanceFlag = 0; |
|
continue; |
|
} |
|
lbInfo[ldCount].loadBalanceFlag = 1; |
|
} |
|
} |
|
|
|
static u8 megasas_get_best_arm_pd(struct megasas_instance *instance, |
|
struct LD_LOAD_BALANCE_INFO *lbInfo, |
|
struct IO_REQUEST_INFO *io_info, |
|
struct MR_DRV_RAID_MAP_ALL *drv_map) |
|
{ |
|
struct MR_LD_RAID *raid; |
|
u16 pd1_dev_handle; |
|
u16 pend0, pend1, ld; |
|
u64 diff0, diff1; |
|
u8 bestArm, pd0, pd1, span, arm; |
|
u32 arRef, span_row_size; |
|
|
|
u64 block = io_info->ldStartBlock; |
|
u32 count = io_info->numBlocks; |
|
|
|
span = ((io_info->span_arm & RAID_CTX_SPANARM_SPAN_MASK) |
|
>> RAID_CTX_SPANARM_SPAN_SHIFT); |
|
arm = (io_info->span_arm & RAID_CTX_SPANARM_ARM_MASK); |
|
|
|
ld = MR_TargetIdToLdGet(io_info->ldTgtId, drv_map); |
|
raid = MR_LdRaidGet(ld, drv_map); |
|
span_row_size = instance->UnevenSpanSupport ? |
|
SPAN_ROW_SIZE(drv_map, ld, span) : raid->rowSize; |
|
|
|
arRef = MR_LdSpanArrayGet(ld, span, drv_map); |
|
pd0 = MR_ArPdGet(arRef, arm, drv_map); |
|
pd1 = MR_ArPdGet(arRef, (arm + 1) >= span_row_size ? |
|
(arm + 1 - span_row_size) : arm + 1, drv_map); |
|
|
|
/* Get PD1 Dev Handle */ |
|
|
|
pd1_dev_handle = MR_PdDevHandleGet(pd1, drv_map); |
|
|
|
if (pd1_dev_handle == MR_DEVHANDLE_INVALID) { |
|
bestArm = arm; |
|
} else { |
|
/* get the pending cmds for the data and mirror arms */ |
|
pend0 = atomic_read(&lbInfo->scsi_pending_cmds[pd0]); |
|
pend1 = atomic_read(&lbInfo->scsi_pending_cmds[pd1]); |
|
|
|
/* Determine the disk whose head is nearer to the req. block */ |
|
diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[pd0]); |
|
diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[pd1]); |
|
bestArm = (diff0 <= diff1 ? arm : arm ^ 1); |
|
|
|
/* Make balance count from 16 to 4 to |
|
* keep driver in sync with Firmware |
|
*/ |
|
if ((bestArm == arm && pend0 > pend1 + lb_pending_cmds) || |
|
(bestArm != arm && pend1 > pend0 + lb_pending_cmds)) |
|
bestArm ^= 1; |
|
|
|
/* Update the last accessed block on the correct pd */ |
|
io_info->span_arm = |
|
(span << RAID_CTX_SPANARM_SPAN_SHIFT) | bestArm; |
|
io_info->pd_after_lb = (bestArm == arm) ? pd0 : pd1; |
|
} |
|
|
|
lbInfo->last_accessed_block[io_info->pd_after_lb] = block + count - 1; |
|
return io_info->pd_after_lb; |
|
} |
|
|
|
__le16 get_updated_dev_handle(struct megasas_instance *instance, |
|
struct LD_LOAD_BALANCE_INFO *lbInfo, |
|
struct IO_REQUEST_INFO *io_info, |
|
struct MR_DRV_RAID_MAP_ALL *drv_map) |
|
{ |
|
u8 arm_pd; |
|
__le16 devHandle; |
|
|
|
/* get best new arm (PD ID) */ |
|
arm_pd = megasas_get_best_arm_pd(instance, lbInfo, io_info, drv_map); |
|
devHandle = MR_PdDevHandleGet(arm_pd, drv_map); |
|
io_info->pd_interface = MR_PdInterfaceTypeGet(arm_pd, drv_map); |
|
atomic_inc(&lbInfo->scsi_pending_cmds[arm_pd]); |
|
|
|
return devHandle; |
|
}
|
|
|