// 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 <kashyap.desai@broadcom.com>
* Sumit Saxena <sumit.saxena@broadcom.com>
*
* Send feedback to: megaraidlinux.pdl@broadcom.com
*/
#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 4
static unsigned int lb_pending_cmds = LB_PENDING_CMDS_DEFAULT;
module_param(lb_pending_cmds, int, 0444);
MODULE_PARM_DESC(lb_pending_cmds, "Change raid-1 load balancing outstanding "
"threshold. Valid Values are 1-128. Default: 4");
#define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
#define MR_LD_STATE_OPTIMAL 3
#define SPAN_ROW_SIZE(map, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowSize)
#define SPAN_ROW_DATA_SIZE(map_, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize)
#define SPAN_INVALID 0xff
/* 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)
{
u64 d;
u32 remainder;
if (!divisor)</