// SPDX-License-Identifier: GPL-2.0-or-later /* * Linux MegaRAID driver for SAS based RAID controllers * * Copyright (c) 2009-2013 LSI Corporation * Copyright (c) 2013-2016 Avago Technologies * Copyright (c) 2016-2018 Broadcom Inc. * * FILE: megaraid_sas_fp.c * * Authors: Broadcom Inc. * Sumant Patro * Varad Talamacki * Manoj Jose * Kashyap Desai <[email protected]> * Sumit Saxena <[email protected]> * * Send feedback to: [email protected] */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/list.h> #include <linux/moduleparam.h> #include <linux/module.h> #include <linux/spinlock.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/uio.h> #include <linux/uaccess.h> #include <linux/fs.h> #include <linux/compat.h> #include <linux/blkdev.h> #include <linux/poll.h> #include <linux/irq_poll.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include "megaraid_sas_fusion.h" #include "megaraid_sas.h" #include <asm/div64.h> #define LB_PENDING_CMDS_DEFAULT … static unsigned int lb_pending_cmds = …; module_param(lb_pending_cmds, int, 0444); MODULE_PARM_DESC(…) …; #define ABS_DIFF(a, b) … #define MR_LD_STATE_OPTIMAL … #define SPAN_ROW_SIZE(map, ld, index_) … #define SPAN_ROW_DATA_SIZE(map_, ld, index_) … #define SPAN_INVALID … /* Prototypes */ static void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo); 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); static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map); u32 mega_mod64(u64 dividend, u32 divisor) { … } /** * mega_div64_32 - Do a 64-bit division * @dividend: Dividend * @divisor: Divisor * * @return quotient **/ static u64 mega_div64_32(uint64_t dividend, uint32_t divisor) { … } struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) { … } static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) { … } static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_DRV_RAID_MAP_ALL *map) { … } u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_DRV_RAID_MAP_ALL *map) { … } u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_DRV_RAID_MAP_ALL *map) { … } __le16 MR_PdDevHandleGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) { … } static u8 MR_PdInterfaceTypeGet(u32 pd, struct MR_DRV_RAID_MAP_ALL *map) { … } u16 MR_GetLDTgtId(u32 ld, struct MR_DRV_RAID_MAP_ALL *map) { … } u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_DRV_RAID_MAP_ALL *map) { … } static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span, struct MR_DRV_RAID_MAP_ALL *map) { … } /* * This function will Populate Driver Map using firmware raid map */ static int MR_PopulateDrvRaidMap(struct megasas_instance *instance, u64 map_id) { … } /* * This function will validate Map info data provided by FW */ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) { … } static u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL *map) { … } /* ****************************************************************************** * * This routine calculates the Span block for given row using spanset. * * Inputs : * instance - HBA instance * ld - Logical drive number * row - Row number * map - LD map * * Outputs : * * span - Span number * block - Absolute Block number in the physical disk * div_error - Devide error code. */ static u32 mr_spanset_get_span_block(struct megasas_instance *instance, u32 ld, u64 row, u64 *span_blk, struct MR_DRV_RAID_MAP_ALL *map) { … } /* ****************************************************************************** * * This routine calculates the row for given strip using spanset. * * Inputs : * instance - HBA instance * ld - Logical drive number * Strip - Strip * map - LD map * * Outputs : * * row - row associated with strip */ static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld, u64 strip, struct MR_DRV_RAID_MAP_ALL *map) { … } /* ****************************************************************************** * * 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) { … } /* ****************************************************************************** * * 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) { … } /* 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) { … } /* ****************************************************************************** * * 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) { … } /* ****************************************************************************** * * 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) { … } /* * 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) { … } /* ****************************************************************************** * * 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) { … } /* ****************************************************************************** * * 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) { … } void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map, struct LD_LOAD_BALANCE_INFO *lbInfo) { … } 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) { … } __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) { … }
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