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scsi: mpi3mr: Base driver code

Browse source 
Implement basic pci device driver requirements: Device probing, memory
allocation, mapping system registers, allocate irq lines, etc.

Source is managed in mainly three different files:

 - mpi3mr_fw.c:  Common code which interacts with underlying fw/hw.

 - mpi3mr_os.c:  Common code which interacts with SCSI midlayer.

 - mpi3mr_app.c: Common code which interacts with application/ioctl.
		 This is currently work in progress.

Link: https://lore.kernel.org/r/20210520152545.2710479-3-kashyap.desai@broadcom.com
Cc: sathya.prakash@broadcom.com
Cc: bvanassche@acm.org
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kashyap Desai 2021-05-20 20:55:23 +05:30 committed by Martin K. Petersen
parent c4f7ac6461
commit 824a156633
5 changed files with 2761 additions and 0 deletions
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4
drivers/scsi/mpi3mr/Makefile Normal file
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# mpi3mr makefile
obj-m += mpi3mr.o
mpi3mr-y += mpi3mr_os.o \
mpi3mr_fw.o \

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drivers/scsi/mpi3mr/mpi3mr.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Driver for Broadcom MPI3 Storage Controllers
*
* Copyright (C) 2017-2021 Broadcom Inc.
* (mailto: mpi3mr-linuxdrv.pdl@broadcom.com)
*
*/
#ifndef MPI3MR_H_INCLUDED
#define MPI3MR_H_INCLUDED
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/blk-mq-pci.h>
#include <linux/delay.h>
#include <linux/dmapool.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "mpi/mpi30_transport.h"
#include "mpi/mpi30_image.h"
#include "mpi/mpi30_init.h"
#include "mpi/mpi30_ioc.h"
#include "mpi3mr_debug.h"
/* Global list and lock for storing multiple adapters managed by the driver */
extern spinlock_t mrioc_list_lock;
extern struct list_head mrioc_list;
#define MPI3MR_DRIVER_VERSION "00.255.45.01"
#define MPI3MR_DRIVER_RELDATE "12-December-2020"
#define MPI3MR_DRIVER_NAME "mpi3mr"
#define MPI3MR_DRIVER_LICENSE "GPL"
#define MPI3MR_DRIVER_AUTHOR "Broadcom Inc. <mpi3mr-linuxdrv.pdl@broadcom.com>"
#define MPI3MR_DRIVER_DESC "MPI3 Storage Controller Device Driver"
#define MPI3MR_NAME_LENGTH 32
#define IOCNAME "%s: "
/* Definitions for internal SGL and Chain SGL buffers */
#define MPI3MR_PAGE_SIZE_4K 4096
#define MPI3MR_SG_DEPTH (MPI3MR_PAGE_SIZE_4K / sizeof(struct mpi3_sge_common))
/* Definitions for MAX values for shost */
#define MPI3MR_MAX_CMDS_LUN 7
#define MPI3MR_MAX_CDB_LENGTH 32
/* Admin queue management definitions */
#define MPI3MR_ADMIN_REQ_Q_SIZE (2 * MPI3MR_PAGE_SIZE_4K)
#define MPI3MR_ADMIN_REPLY_Q_SIZE (4 * MPI3MR_PAGE_SIZE_4K)
#define MPI3MR_ADMIN_REQ_FRAME_SZ 128
#define MPI3MR_ADMIN_REPLY_FRAME_SZ 16
/* Reserved Host Tag definitions */
#define MPI3MR_HOSTTAG_INVALID 0xFFFF
#define MPI3MR_HOSTTAG_INITCMDS 1
#define MPI3MR_HOSTTAG_IOCTLCMDS 2
#define MPI3MR_HOSTTAG_BLK_TMS 5
#define MPI3MR_NUM_DEVRMCMD 1
#define MPI3MR_HOSTTAG_DEVRMCMD_MIN (MPI3MR_HOSTTAG_BLK_TMS + 1)
#define MPI3MR_HOSTTAG_DEVRMCMD_MAX (MPI3MR_HOSTTAG_DEVRMCMD_MIN + \
MPI3MR_NUM_DEVRMCMD - 1)
#define MPI3MR_INTERNAL_CMDS_RESVD MPI3MR_HOSTTAG_DEVRMCMD_MAX
/* Reduced resource count definition for crash kernel */
#define MPI3MR_HOST_IOS_KDUMP 128
/* command/controller interaction timeout definitions in seconds */
#define MPI3MR_INTADMCMD_TIMEOUT 10
#define MPI3MR_RESETTM_TIMEOUT 30
#define MPI3MR_DEFAULT_SHUTDOWN_TIME 120
#define MPI3MR_WATCHDOG_INTERVAL 1000 /* in milli seconds */
/* Internal admin command state definitions*/
#define MPI3MR_CMD_NOTUSED 0x8000
#define MPI3MR_CMD_COMPLETE 0x0001
#define MPI3MR_CMD_PENDING 0x0002
#define MPI3MR_CMD_REPLY_VALID 0x0004
#define MPI3MR_CMD_RESET 0x0008
/* Definitions for Event replies and sense buffer allocated per controller */
#define MPI3MR_NUM_EVT_REPLIES 64
#define MPI3MR_SENSEBUF_SZ 256
#define MPI3MR_SENSEBUF_FACTOR 3
#define MPI3MR_CHAINBUF_FACTOR 3
/* Invalid target device handle */
#define MPI3MR_INVALID_DEV_HANDLE 0xFFFF
/* Controller Reset related definitions */
#define MPI3MR_HOSTDIAG_UNLOCK_RETRY_COUNT 5
#define MPI3MR_MAX_RESET_RETRY_COUNT 3
/* ResponseCode definitions */
#define MPI3MR_RI_MASK_RESPCODE (0x000000FF)
#define MPI3MR_RSP_TM_COMPLETE 0x00
#define MPI3MR_RSP_INVALID_FRAME 0x02
#define MPI3MR_RSP_TM_NOT_SUPPORTED 0x04
#define MPI3MR_RSP_TM_FAILED 0x05
#define MPI3MR_RSP_TM_SUCCEEDED 0x08
#define MPI3MR_RSP_TM_INVALID_LUN 0x09
#define MPI3MR_RSP_TM_OVERLAPPED_TAG 0x0A
#define MPI3MR_RSP_IO_QUEUED_ON_IOC \
MPI3_SCSITASKMGMT_RSPCODE_IO_QUEUED_ON_IOC
/* SGE Flag definition */
#define MPI3MR_SGEFLAGS_SYSTEM_SIMPLE_END_OF_LIST \
(MPI3_SGE_FLAGS_ELEMENT_TYPE_SIMPLE | MPI3_SGE_FLAGS_DLAS_SYSTEM | \
MPI3_SGE_FLAGS_END_OF_LIST)
/* IOC State definitions */
enum mpi3mr_iocstate {
MRIOC_STATE_READY = 1,
MRIOC_STATE_RESET,
MRIOC_STATE_FAULT,
MRIOC_STATE_BECOMING_READY,
MRIOC_STATE_RESET_REQUESTED,
MRIOC_STATE_UNRECOVERABLE,
};
/* Reset reason code definitions*/
enum mpi3mr_reset_reason {
MPI3MR_RESET_FROM_BRINGUP = 1,
MPI3MR_RESET_FROM_FAULT_WATCH = 2,
MPI3MR_RESET_FROM_IOCTL = 3,
MPI3MR_RESET_FROM_EH_HOS = 4,
MPI3MR_RESET_FROM_TM_TIMEOUT = 5,
MPI3MR_RESET_FROM_IOCTL_TIMEOUT = 6,
MPI3MR_RESET_FROM_MUR_FAILURE = 7,
MPI3MR_RESET_FROM_CTLR_CLEANUP = 8,
MPI3MR_RESET_FROM_CIACTIV_FAULT = 9,
MPI3MR_RESET_FROM_PE_TIMEOUT = 10,
MPI3MR_RESET_FROM_TSU_TIMEOUT = 11,
MPI3MR_RESET_FROM_DELREQQ_TIMEOUT = 12,
MPI3MR_RESET_FROM_DELREPQ_TIMEOUT = 13,
MPI3MR_RESET_FROM_CREATEREPQ_TIMEOUT = 14,
MPI3MR_RESET_FROM_CREATEREQQ_TIMEOUT = 15,
MPI3MR_RESET_FROM_IOCFACTS_TIMEOUT = 16,
MPI3MR_RESET_FROM_IOCINIT_TIMEOUT = 17,
MPI3MR_RESET_FROM_EVTNOTIFY_TIMEOUT = 18,
MPI3MR_RESET_FROM_EVTACK_TIMEOUT = 19,
MPI3MR_RESET_FROM_CIACTVRST_TIMER = 20,
MPI3MR_RESET_FROM_GETPKGVER_TIMEOUT = 21,
};
/**
* struct mpi3mr_compimg_ver - replica of component image
* version defined in mpi30_image.h in host endianness
*
*/
struct mpi3mr_compimg_ver {
u16 build_num;
u16 cust_id;
u8 ph_minor;
u8 ph_major;
u8 gen_minor;
u8 gen_major;
};
/**
* struct mpi3mr_ioc_facs - replica of component image version
* defined in mpi30_ioc.h in host endianness
*
*/
struct mpi3mr_ioc_facts {
u32 ioc_capabilities;
struct mpi3mr_compimg_ver fw_ver;
u32 mpi_version;
u16 max_reqs;
u16 product_id;
u16 op_req_sz;
u16 reply_sz;
u16 exceptions;
u16 max_perids;
u16 max_pds;
u16 max_sasexpanders;
u16 max_sasinitiators;
u16 max_enclosures;
u16 max_pcie_switches;
u16 max_nvme;
u16 max_vds;
u16 max_hpds;
u16 max_advhpds;
u16 max_raidpds;
u16 min_devhandle;
u16 max_devhandle;
u16 max_op_req_q;
u16 max_op_reply_q;
u16 shutdown_timeout;
u8 ioc_num;
u8 who_init;
u16 max_msix_vectors;
u8 personality;
u8 dma_mask;
u8 protocol_flags;
u8 sge_mod_mask;
u8 sge_mod_value;
u8 sge_mod_shift;
};
/**
* struct op_req_qinfo - Operational Request Queue Information
*
* @ci: consumer index
* @pi: producer index
*/
struct op_req_qinfo {
u16 ci;
u16 pi;
};
/**
* struct op_reply_qinfo - Operational Reply Queue Information
*
* @ci: consumer index
* @qid: Queue Id starting from 1
*/
struct op_reply_qinfo {
u16 ci;
u16 qid;
};
/**
* struct mpi3mr_intr_info - Interrupt cookie information
*
* @mrioc: Adapter instance reference
* @msix_index: MSIx index
* @op_reply_q: Associated operational reply queue
* @name: Dev name for the irq claiming device
*/
struct mpi3mr_intr_info {
struct mpi3mr_ioc *mrioc;
u16 msix_index;
struct op_reply_qinfo *op_reply_q;
char name[MPI3MR_NAME_LENGTH];
};
/**
* struct mpi3mr_drv_cmd - Internal command tracker
*
* @mutex: Command mutex
* @done: Completeor for wakeup
* @reply: Firmware reply for internal commands
* @sensebuf: Sensebuf for SCSI IO commands
* @state: Command State
* @dev_handle: Firmware handle for device specific commands
* @ioc_status: IOC status from the firmware
* @ioc_loginfo:IOC log info from the firmware
* @is_waiting: Is the command issued in block mode
* @retry_count: Retry count for retriable commands
* @host_tag: Host tag used by the command
* @callback: Callback for non blocking commands
*/
struct mpi3mr_drv_cmd {
struct mutex mutex;
struct completion done;
void *reply;
u8 *sensebuf;
u16 state;
u16 dev_handle;
u16 ioc_status;
u32 ioc_loginfo;
u8 is_waiting;
u8 retry_count;
u16 host_tag;
void (*callback)(struct mpi3mr_ioc *mrioc,
struct mpi3mr_drv_cmd *drv_cmd);
};
/**
* struct chain_element - memory descriptor structure to store
* virtual and dma addresses for chain elements.
*
* @addr: virtual address
* @dma_addr: dma address
*/
struct chain_element {
void *addr;
dma_addr_t dma_addr;
};
/**
* struct scmd_priv - SCSI command private data
*
* @host_tag: Host tag specific to operational queue
* @in_lld_scope: Command in LLD scope or not
* @scmd: SCSI Command pointer
* @req_q_idx: Operational request queue index
* @chain_idx: Chain frame index
* @mpi3mr_scsiio_req: MPI SCSI IO request
*/
struct scmd_priv {
u16 host_tag;
u8 in_lld_scope;
struct scsi_cmnd *scmd;
u16 req_q_idx;
int chain_idx;
u8 mpi3mr_scsiio_req[MPI3MR_ADMIN_REQ_FRAME_SZ];
};
/**
* struct mpi3mr_ioc - Adapter anchor structure stored in shost
* private data
*
* @list: List pointer
* @pdev: PCI device pointer
* @shost: Scsi_Host pointer
* @id: Controller ID
* @cpu_count: Number of online CPUs
* @name: Controller ASCII name
* @driver_name: Driver ASCII name
* @sysif_regs: System interface registers virtual address
* @sysif_regs_phys: System interface registers physical address
* @bars: PCI BARS
* @dma_mask: DMA mask
* @msix_count: Number of MSIX vectors used
* @intr_enabled: Is interrupts enabled
* @num_admin_req: Number of admin requests
* @admin_req_q_sz: Admin request queue size
* @admin_req_pi: Admin request queue producer index
* @admin_req_ci: Admin request queue consumer index
* @admin_req_base: Admin request queue base virtual address
* @admin_req_dma: Admin request queue base dma address
* @admin_req_lock: Admin queue access lock
* @num_admin_replies: Number of admin replies
* @admin_reply_q_sz: Admin reply queue size
* @admin_reply_ci: Admin reply queue consumer index
* @admin_reply_ephase:Admin reply queue expected phase
* @admin_reply_base: Admin reply queue base virtual address
* @admin_reply_dma: Admin reply queue base dma address
* @ready_timeout: Controller ready timeout
* @intr_info: Interrupt cookie pointer
* @intr_info_count: Number of interrupt cookies
* @num_queues: Number of operational queues
* @num_op_req_q: Number of operational request queues
* @req_qinfo: Operational request queue info pointer
* @num_op_reply_q: Number of operational reply queues
* @op_reply_qinfo: Operational reply queue info pointer
* @init_cmds: Command tracker for initialization commands
* @facts: Cached IOC facts data
* @op_reply_desc_sz: Operational reply descriptor size
* @num_reply_bufs: Number of reply buffers allocated
* @reply_buf_pool: Reply buffer pool
* @reply_buf: Reply buffer base virtual address
* @reply_buf_dma: Reply buffer DMA address
* @reply_buf_dma_max_address: Reply DMA address max limit
* @reply_free_qsz: Reply free queue size
* @reply_free_q_pool: Reply free queue pool
* @reply_free_q: Reply free queue base virtual address
* @reply_free_q_dma: Reply free queue base DMA address
* @reply_free_queue_lock: Reply free queue lock
* @reply_free_queue_host_index: Reply free queue host index
* @num_sense_bufs: Number of sense buffers
* @sense_buf_pool: Sense buffer pool
* @sense_buf: Sense buffer base virtual address
* @sense_buf_dma: Sense buffer base DMA address
* @sense_buf_q_sz: Sense buffer queue size
* @sense_buf_q_pool: Sense buffer queue pool
* @sense_buf_q: Sense buffer queue virtual address
* @sense_buf_q_dma: Sense buffer queue DMA address
* @sbq_lock: Sense buffer queue lock
* @sbq_host_index: Sense buffer queuehost index
* @is_driver_loading: Is driver still loading
* @max_host_ios: Maximum host I/O count
* @chain_buf_count: Chain buffer count
* @chain_buf_pool: Chain buffer pool
* @chain_sgl_list: Chain SGL list
* @chain_bitmap_sz: Chain buffer allocator bitmap size
* @chain_bitmap: Chain buffer allocator bitmap
* @reset_in_progress: Reset in progress flag
* @unrecoverable: Controller unrecoverable flag
* @logging_level: Controller debug logging level
* @current_event: Firmware event currently in process
* @driver_info: Driver, Kernel, OS information to firmware
* @change_count: Topology change count
*/
struct mpi3mr_ioc {
struct list_head list;
struct pci_dev *pdev;
struct Scsi_Host *shost;
u8 id;
int cpu_count;
char name[MPI3MR_NAME_LENGTH];
char driver_name[MPI3MR_NAME_LENGTH];
volatile struct mpi3_sysif_registers __iomem *sysif_regs;
resource_size_t sysif_regs_phys;
int bars;
u64 dma_mask;
u16 msix_count;
u8 intr_enabled;
u16 num_admin_req;
u32 admin_req_q_sz;
u16 admin_req_pi;
u16 admin_req_ci;
void *admin_req_base;
dma_addr_t admin_req_dma;
spinlock_t admin_req_lock;
u16 num_admin_replies;
u32 admin_reply_q_sz;
u16 admin_reply_ci;
u8 admin_reply_ephase;
void *admin_reply_base;
dma_addr_t admin_reply_dma;
u32 ready_timeout;
struct mpi3mr_intr_info *intr_info;
u16 intr_info_count;
u16 num_queues;
u16 num_op_req_q;
struct op_req_qinfo *req_qinfo;
u16 num_op_reply_q;
struct op_reply_qinfo *op_reply_qinfo;
struct mpi3mr_drv_cmd init_cmds;
struct mpi3mr_ioc_facts facts;
u16 op_reply_desc_sz;
u32 num_reply_bufs;
struct dma_pool *reply_buf_pool;
u8 *reply_buf;
dma_addr_t reply_buf_dma;
dma_addr_t reply_buf_dma_max_address;
u16 reply_free_qsz;
struct dma_pool *reply_free_q_pool;
__le64 *reply_free_q;
dma_addr_t reply_free_q_dma;
spinlock_t reply_free_queue_lock;
u32 reply_free_queue_host_index;
u32 num_sense_bufs;
struct dma_pool *sense_buf_pool;
u8 *sense_buf;
dma_addr_t sense_buf_dma;
u16 sense_buf_q_sz;
struct dma_pool *sense_buf_q_pool;
__le64 *sense_buf_q;
dma_addr_t sense_buf_q_dma;
spinlock_t sbq_lock;
u32 sbq_host_index;
u8 is_driver_loading;
u16 max_host_ios;
u32 chain_buf_count;
struct dma_pool *chain_buf_pool;
struct chain_element *chain_sgl_list;
u16 chain_bitmap_sz;
void *chain_bitmap;
u8 reset_in_progress;
u8 unrecoverable;
int logging_level;
struct mpi3mr_fwevt *current_event;
struct mpi3_driver_info_layout driver_info;
u16 change_count;
};
int mpi3mr_setup_resources(struct mpi3mr_ioc *mrioc);
void mpi3mr_cleanup_resources(struct mpi3mr_ioc *mrioc);
int mpi3mr_init_ioc(struct mpi3mr_ioc *mrioc);
void mpi3mr_cleanup_ioc(struct mpi3mr_ioc *mrioc);
int mpi3mr_admin_request_post(struct mpi3mr_ioc *mrioc, void *admin_req,
u16 admin_req_sz, u8 ignore_reset);
void mpi3mr_add_sg_single(void *paddr, u8 flags, u32 length,
dma_addr_t dma_addr);
void mpi3mr_build_zero_len_sge(void *paddr);
void *mpi3mr_get_sensebuf_virt_addr(struct mpi3mr_ioc *mrioc,
dma_addr_t phys_addr);
void *mpi3mr_get_reply_virt_addr(struct mpi3mr_ioc *mrioc,
dma_addr_t phys_addr);
void mpi3mr_repost_sense_buf(struct mpi3mr_ioc *mrioc,
u64 sense_buf_dma);
void mpi3mr_start_watchdog(struct mpi3mr_ioc *mrioc);
void mpi3mr_stop_watchdog(struct mpi3mr_ioc *mrioc);
int mpi3mr_soft_reset_handler(struct mpi3mr_ioc *mrioc,
u32 reset_reason, u8 snapdump);
void mpi3mr_ioc_disable_intr(struct mpi3mr_ioc *mrioc);
void mpi3mr_ioc_enable_intr(struct mpi3mr_ioc *mrioc);
enum mpi3mr_iocstate mpi3mr_get_iocstate(struct mpi3mr_ioc *mrioc);
#endif /*MPI3MR_H_INCLUDED*/

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Driver for Broadcom MPI3 Storage Controllers
*
* Copyright (C) 2017-2021 Broadcom Inc.
* (mailto: mpi3mr-linuxdrv.pdl@broadcom.com)
*
*/
#ifndef MPI3SAS_DEBUG_H_INCLUDED
#define MPI3SAS_DEBUG_H_INCLUDED
/*
* debug levels
*/
#define MPI3_DEBUG 0x00000001
#define MPI3_DEBUG_MSG_FRAME 0x00000002
#define MPI3_DEBUG_SG 0x00000004
#define MPI3_DEBUG_EVENTS 0x00000008
#define MPI3_DEBUG_EVENT_WORK_TASK 0x00000010
#define MPI3_DEBUG_INIT 0x00000020
#define MPI3_DEBUG_EXIT 0x00000040
#define MPI3_DEBUG_FAIL 0x00000080
#define MPI3_DEBUG_TM 0x00000100
#define MPI3_DEBUG_REPLY 0x00000200
#define MPI3_DEBUG_HANDSHAKE 0x00000400
#define MPI3_DEBUG_CONFIG 0x00000800
#define MPI3_DEBUG_DL 0x00001000
#define MPI3_DEBUG_RESET 0x00002000
#define MPI3_DEBUG_SCSI 0x00004000
#define MPI3_DEBUG_IOCTL 0x00008000
#define MPI3_DEBUG_CSMISAS 0x00010000
#define MPI3_DEBUG_SAS 0x00020000
#define MPI3_DEBUG_TRANSPORT 0x00040000
#define MPI3_DEBUG_TASK_SET_FULL 0x00080000
#define MPI3_DEBUG_TRIGGER_DIAG 0x00200000
/*
* debug macros
*/
#define ioc_err(ioc, fmt, ...) \
pr_err("%s: " fmt, (ioc)->name, ##__VA_ARGS__)
#define ioc_notice(ioc, fmt, ...) \
pr_notice("%s: " fmt, (ioc)->name, ##__VA_ARGS__)
#define ioc_warn(ioc, fmt, ...) \
pr_warn("%s: " fmt, (ioc)->name, ##__VA_ARGS__)
#define ioc_info(ioc, fmt, ...) \
pr_info("%s: " fmt, (ioc)->name, ##__VA_ARGS__)
#define dbgprint(IOC, FMT, ...) \
do { \
if (IOC->logging_level & MPI3_DEBUG) \
pr_info("%s: " FMT, (IOC)->name, ##__VA_ARGS__); \
} while (0)
#endif /* MPT3SAS_DEBUG_H_INCLUDED */

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Broadcom MPI3 Storage Controllers
*
* Copyright (C) 2017-2021 Broadcom Inc.
* (mailto: mpi3mr-linuxdrv.pdl@broadcom.com)
*
*/
#include "mpi3mr.h"
/* global driver scop variables */
LIST_HEAD(mrioc_list);
DEFINE_SPINLOCK(mrioc_list_lock);
static int mrioc_ids;
static int warn_non_secure_ctlr;
MODULE_AUTHOR(MPI3MR_DRIVER_AUTHOR);
MODULE_DESCRIPTION(MPI3MR_DRIVER_DESC);
MODULE_LICENSE(MPI3MR_DRIVER_LICENSE);
MODULE_VERSION(MPI3MR_DRIVER_VERSION);
/* Module parameters*/
int logging_level;
module_param(logging_level, int, 0);
MODULE_PARM_DESC(logging_level,
" bits for enabling additional logging info (default=0)");
/**
* mpi3mr_map_queues - Map queues callback handler
* @shost: SCSI host reference
*
* Call the blk_mq_pci_map_queues with from which operational
* queue the mapping has to be done
*
* Return: return of blk_mq_pci_map_queues
*/
static int mpi3mr_map_queues(struct Scsi_Host *shost)
{
struct mpi3mr_ioc *mrioc = shost_priv(shost);
return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
mrioc->pdev, 0);
}
/**
* mpi3mr_slave_destroy - Slave destroy callback handler
* @sdev: SCSI device reference
*
* Cleanup and free per device(lun) private data.
*
* Return: Nothing.
*/
static void mpi3mr_slave_destroy(struct scsi_device *sdev)
{
}
/**
* mpi3mr_target_destroy - Target destroy callback handler
* @starget: SCSI target reference
*
* Cleanup and free per target private data.
*
* Return: Nothing.
*/
static void mpi3mr_target_destroy(struct scsi_target *starget)
{
}
/**
* mpi3mr_slave_configure - Slave configure callback handler
* @sdev: SCSI device reference
*
* Configure queue depth, max hardware sectors and virt boundary
* as required
*
* Return: 0 always.
*/
static int mpi3mr_slave_configure(struct scsi_device *sdev)
{
int retval = 0;
return retval;
}
/**
* mpi3mr_slave_alloc -Slave alloc callback handler
* @sdev: SCSI device reference
*
* Allocate per device(lun) private data and initialize it.
*
* Return: 0 on success -ENOMEM on memory allocation failure.
*/
static int mpi3mr_slave_alloc(struct scsi_device *sdev)
{
int retval = 0;
return retval;
}
/**
* mpi3mr_target_alloc - Target alloc callback handler
* @starget: SCSI target reference
*
* Allocate per target private data and initialize it.
*
* Return: 0 on success -ENOMEM on memory allocation failure.
*/
static int mpi3mr_target_alloc(struct scsi_target *starget)
{
int retval = -ENODEV;
return retval;
}
/**
* mpi3mr_qcmd - I/O request despatcher
* @shost: SCSI Host reference
* @scmd: SCSI Command reference
*
* Issues the SCSI Command as an MPI3 request.
*
* Return: 0 on successful queueing of the request or if the
* request is completed with failure.
* SCSI_MLQUEUE_DEVICE_BUSY when the device is busy.
* SCSI_MLQUEUE_HOST_BUSY when the host queue is full.
*/
static int mpi3mr_qcmd(struct Scsi_Host *shost,
struct scsi_cmnd *scmd)
{
int retval = 0;
scmd->result = DID_NO_CONNECT << 16;
scmd->scsi_done(scmd);
return retval;
}
static struct scsi_host_template mpi3mr_driver_template = {
.module = THIS_MODULE,
.name = "MPI3 Storage Controller",
.proc_name = MPI3MR_DRIVER_NAME,
.queuecommand = mpi3mr_qcmd,
.target_alloc = mpi3mr_target_alloc,
.slave_alloc = mpi3mr_slave_alloc,
.slave_configure = mpi3mr_slave_configure,
.target_destroy = mpi3mr_target_destroy,
.slave_destroy = mpi3mr_slave_destroy,
.map_queues = mpi3mr_map_queues,
.no_write_same = 1,
.can_queue = 1,
.this_id = -1,
.sg_tablesize = MPI3MR_SG_DEPTH,
/* max xfer supported is 1M (2K in 512 byte sized sectors)
*/
.max_sectors = 2048,
.cmd_per_lun = MPI3MR_MAX_CMDS_LUN,
.track_queue_depth = 1,
.cmd_size = sizeof(struct scmd_priv),
};
/**
* mpi3mr_init_drv_cmd - Initialize internal command tracker
* @cmdptr: Internal command tracker
* @host_tag: Host tag used for the specific command
*
* Initialize the internal command tracker structure with
* specified host tag.
*
* Return: Nothing.
*/
static inline void mpi3mr_init_drv_cmd(struct mpi3mr_drv_cmd *cmdptr,
u16 host_tag)
{
mutex_init(&cmdptr->mutex);
cmdptr->reply = NULL;
cmdptr->state = MPI3MR_CMD_NOTUSED;
cmdptr->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
cmdptr->host_tag = host_tag;
}
/**
* mpi3mr_probe - PCI probe callback
* @pdev: PCI device instance
* @id: PCI device ID details
*
* controller initialization routine. Checks the security status
* of the controller and if it is invalid or tampered return the
* probe without initializing the controller. Otherwise,
* allocate per adapter instance through shost_priv and
* initialize controller specific data structures, initializae
* the controller hardware, add shost to the SCSI subsystem.
*
* Return: 0 on success, non-zero on failure.
*/
static int
mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct mpi3mr_ioc *mrioc = NULL;
struct Scsi_Host *shost = NULL;
int retval = 0;
shost = scsi_host_alloc(&mpi3mr_driver_template,
sizeof(struct mpi3mr_ioc));
if (!shost) {
retval = -ENODEV;
goto shost_failed;
}
mrioc = shost_priv(shost);
mrioc->id = mrioc_ids++;
sprintf(mrioc->driver_name, "%s", MPI3MR_DRIVER_NAME);
sprintf(mrioc->name, "%s%d", mrioc->driver_name, mrioc->id);
INIT_LIST_HEAD(&mrioc->list);
spin_lock(&mrioc_list_lock);
list_add_tail(&mrioc->list, &mrioc_list);
spin_unlock(&mrioc_list_lock);
spin_lock_init(&mrioc->admin_req_lock);
spin_lock_init(&mrioc->reply_free_queue_lock);
spin_lock_init(&mrioc->sbq_lock);
mpi3mr_init_drv_cmd(&mrioc->init_cmds, MPI3MR_HOSTTAG_INITCMDS);
mrioc->logging_level = logging_level;
mrioc->shost = shost;
mrioc->pdev = pdev;
/* init shost parameters */
shost->max_cmd_len = MPI3MR_MAX_CDB_LENGTH;
shost->max_lun = -1;
shost->unique_id = mrioc->id;
shost->max_channel = 1;
shost->max_id = 0xFFFFFFFF;
mrioc->is_driver_loading = 1;
if (mpi3mr_init_ioc(mrioc)) {
ioc_err(mrioc, "failure at %s:%d/%s()!\n",
__FILE__, __LINE__, __func__);
retval = -ENODEV;
goto out_iocinit_failed;
}
shost->nr_hw_queues = mrioc->num_op_reply_q;
shost->can_queue = mrioc->max_host_ios;
shost->sg_tablesize = MPI3MR_SG_DEPTH;
shost->max_id = mrioc->facts.max_perids;
retval = scsi_add_host(shost, &pdev->dev);
if (retval) {
ioc_err(mrioc, "failure at %s:%d/%s()!\n",
__FILE__, __LINE__, __func__);
goto addhost_failed;
}
scsi_scan_host(shost);
return retval;
addhost_failed:
mpi3mr_cleanup_ioc(mrioc);
out_iocinit_failed:
spin_lock(&mrioc_list_lock);
list_del(&mrioc->list);
spin_unlock(&mrioc_list_lock);
scsi_host_put(shost);
shost_failed:
return retval;
}
/**
* mpi3mr_remove - PCI remove callback
* @pdev: PCI device instance
*
* Free up all memory and resources associated with the
* controllerand target devices, unregister the shost.
*
* Return: Nothing.
*/
static void mpi3mr_remove(struct pci_dev *pdev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct mpi3mr_ioc *mrioc;
mrioc = shost_priv(shost);
while (mrioc->reset_in_progress || mrioc->is_driver_loading)
ssleep(1);
scsi_remove_host(shost);
mpi3mr_cleanup_ioc(mrioc);
spin_lock(&mrioc_list_lock);
list_del(&mrioc->list);
spin_unlock(&mrioc_list_lock);
scsi_host_put(shost);
}
/**
* mpi3mr_shutdown - PCI shutdown callback
* @pdev: PCI device instance
*
* Free up all memory and resources associated with the
* controller
*
* Return: Nothing.
*/
static void mpi3mr_shutdown(struct pci_dev *pdev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct mpi3mr_ioc *mrioc;
if (!shost)
return;
mrioc = shost_priv(shost);
while (mrioc->reset_in_progress || mrioc->is_driver_loading)
ssleep(1);
mpi3mr_cleanup_ioc(mrioc);
}
static const struct pci_device_id mpi3mr_pci_id_table[] = {
{
PCI_DEVICE_SUB(PCI_VENDOR_ID_LSI_LOGIC, 0x00A5,
PCI_ANY_ID, PCI_ANY_ID)
},
{ 0 }
};
MODULE_DEVICE_TABLE(pci, mpi3mr_pci_id_table);
static struct pci_driver mpi3mr_pci_driver = {
.name = MPI3MR_DRIVER_NAME,
.id_table = mpi3mr_pci_id_table,
.probe = mpi3mr_probe,
.remove = mpi3mr_remove,
.shutdown = mpi3mr_shutdown,
};
static int __init mpi3mr_init(void)
{
int ret_val;
pr_info("Loading %s version %s\n", MPI3MR_DRIVER_NAME,
MPI3MR_DRIVER_VERSION);
ret_val = pci_register_driver(&mpi3mr_pci_driver);
return ret_val;
}
static void __exit mpi3mr_exit(void)
{
if (warn_non_secure_ctlr)
pr_warn(
"Unloading %s version %s while managing a non secure controller\n",
MPI3MR_DRIVER_NAME, MPI3MR_DRIVER_VERSION);
else
pr_info("Unloading %s version %s\n", MPI3MR_DRIVER_NAME,
MPI3MR_DRIVER_VERSION);
pci_unregister_driver(&mpi3mr_pci_driver);
}
module_init(mpi3mr_init);
module_exit(mpi3mr_exit);