block: Add driver for Micron RealSSD pcie flash cards
This adds mtip32xx, a driver supporting Microns line of pci-express flash storage cards. Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Sam Bradshaw <sbradshaw@micron.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Sam Bradshaw
Jens Axboe
Родитель
5c8a0fbba5
Коммит
88523a6155
|
|
@ -116,6 +116,8 @@ config PARIDE
|
|||
|
||||
source "drivers/block/paride/Kconfig"
|
||||
|
||||
source "drivers/block/mtip32xx/Kconfig"
|
||||
|
||||
config BLK_CPQ_DA
|
||||
tristate "Compaq SMART2 support"
|
||||
depends on PCI && VIRT_TO_BUS
|
||||
|
|
|
|||
|
|
@ -39,5 +39,6 @@ obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
|
|||
obj-$(CONFIG_XEN_BLKDEV_BACKEND) += xen-blkback/
|
||||
obj-$(CONFIG_BLK_DEV_DRBD) += drbd/
|
||||
obj-$(CONFIG_BLK_DEV_RBD) += rbd.o
|
||||
obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx/
|
||||
|
||||
swim_mod-y := swim.o swim_asm.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,9 @@
|
|||
#
|
||||
# mtip32xx device driver configuration
|
||||
#
|
||||
|
||||
config BLK_DEV_PCIESSD_MTIP32XX
|
||||
tristate "Block Device Driver for Micron PCIe SSDs"
|
||||
depends on HOTPLUG_PCI_PCIE
|
||||
help
|
||||
This enables the block driver for Micron PCIe SSDs.
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
#
|
||||
# Makefile for Block device driver for Micron PCIe SSD
|
||||
#
|
||||
|
||||
obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx.o
|
||||
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
|
|
@ -0,0 +1,445 @@
|
|||
/*
|
||||
* mtip32xx.h - Header file for the P320 SSD Block Driver
|
||||
* Copyright (C) 2011 Micron Technology, Inc.
|
||||
*
|
||||
* Portions of this code were derived from works subjected to the
|
||||
* following copyright:
|
||||
* Copyright (C) 2009 Integrated Device Technology, Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __MTIP32XX_H__
|
||||
#define __MTIP32XX_H__
|
||||
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/rwsem.h>
|
||||
#include <linux/ata.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/genhd.h>
|
||||
#include <linux/version.h>
|
||||
|
||||
/* Offset of Subsystem Device ID in pci confoguration space */
|
||||
#define PCI_SUBSYSTEM_DEVICEID 0x2E
|
||||
|
||||
/* offset of Device Control register in PCIe extended capabilites space */
|
||||
#define PCIE_CONFIG_EXT_DEVICE_CONTROL_OFFSET 0x48
|
||||
|
||||
/* # of times to retry timed out IOs */
|
||||
#define MTIP_MAX_RETRIES 5
|
||||
|
||||
/* Various timeout values in ms */
|
||||
#define MTIP_NCQ_COMMAND_TIMEOUT_MS 5000
|
||||
#define MTIP_IOCTL_COMMAND_TIMEOUT_MS 5000
|
||||
#define MTIP_INTERNAL_COMMAND_TIMEOUT_MS 5000
|
||||
|
||||
/* check for timeouts every 500ms */
|
||||
#define MTIP_TIMEOUT_CHECK_PERIOD 500
|
||||
|
||||
/* ftl rebuild */
|
||||
#define MTIP_FTL_REBUILD_OFFSET 142
|
||||
#define MTIP_FTL_REBUILD_MAGIC 0xed51
|
||||
#define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
|
||||
|
||||
/* Macro to extract the tag bit number from a tag value. */
|
||||
#define MTIP_TAG_BIT(tag) (tag & 0x1f)
|
||||
|
||||
/*
|
||||
* Macro to extract the tag index from a tag value. The index
|
||||
* is used to access the correct s_active/Command Issue register based
|
||||
* on the tag value.
|
||||
*/
|
||||
#define MTIP_TAG_INDEX(tag) (tag >> 5)
|
||||
|
||||
/*
|
||||
* Maximum number of scatter gather entries
|
||||
* a single command may have.
|
||||
*/
|
||||
#define MTIP_MAX_SG 128
|
||||
|
||||
/*
|
||||
* Maximum number of slot groups (Command Issue & s_active registers)
|
||||
* NOTE: This is the driver maximum; check dd->slot_groups for actual value.
|
||||
*/
|
||||
#define MTIP_MAX_SLOT_GROUPS 8
|
||||
|
||||
/* Internal command tag. */
|
||||
#define MTIP_TAG_INTERNAL 0
|
||||
|
||||
/* Micron Vendor ID & P320x SSD Device ID */
|
||||
#define PCI_VENDOR_ID_MICRON 0x1344
|
||||
#define P320_DEVICE_ID 0x5150
|
||||
|
||||
/* Driver name and version strings */
|
||||
#define MTIP_DRV_NAME "mtip32xx"
|
||||
#define MTIP_DRV_VERSION "1.2.6os2"
|
||||
|
||||
/* Maximum number of minor device numbers per device. */
|
||||
#define MTIP_MAX_MINORS 16
|
||||
|
||||
/* Maximum number of supported command slots. */
|
||||
#define MTIP_MAX_COMMAND_SLOTS (MTIP_MAX_SLOT_GROUPS * 32)
|
||||
|
||||
/*
|
||||
* Per-tag bitfield size in longs.
|
||||
* Linux bit manipulation functions
|
||||
* (i.e. test_and_set_bit, find_next_zero_bit)
|
||||
* manipulate memory in longs, so we try to make the math work.
|
||||
* take the slot groups and find the number of longs, rounding up.
|
||||
* Careful! i386 and x86_64 use different size longs!
|
||||
*/
|
||||
#define U32_PER_LONG (sizeof(long) / sizeof(u32))
|
||||
#define SLOTBITS_IN_LONGS ((MTIP_MAX_SLOT_GROUPS + \
|
||||
(U32_PER_LONG-1))/U32_PER_LONG)
|
||||
|
||||
/* BAR number used to access the HBA registers. */
|
||||
#define MTIP_ABAR 5
|
||||
|
||||
/* Forced Unit Access Bit */
|
||||
#define FUA_BIT 0x80
|
||||
|
||||
#ifdef DEBUG
|
||||
#define dbg_printk(format, arg...) \
|
||||
printk(pr_fmt(format), ##arg);
|
||||
#else
|
||||
#define dbg_printk(format, arg...)
|
||||
#endif
|
||||
|
||||
/* Register Frame Information Structure (FIS), host to device. */
|
||||
struct host_to_dev_fis {
|
||||
/*
|
||||
* FIS type.
|
||||
* - 27h Register FIS, host to device.
|
||||
* - 34h Register FIS, device to host.
|
||||
* - 39h DMA Activate FIS, device to host.
|
||||
* - 41h DMA Setup FIS, bi-directional.
|
||||
* - 46h Data FIS, bi-directional.
|
||||
* - 58h BIST Activate FIS, bi-directional.
|
||||
* - 5Fh PIO Setup FIS, device to host.
|
||||
* - A1h Set Device Bits FIS, device to host.
|
||||
*/
|
||||
unsigned char type;
|
||||
unsigned char opts;
|
||||
unsigned char command;
|
||||
unsigned char features;
|
||||
|
||||
union {
|
||||
unsigned char lba_low;
|
||||
unsigned char sector;
|
||||
};
|
||||
union {
|
||||
unsigned char lba_mid;
|
||||
unsigned char cyl_low;
|
||||
};
|
||||
union {
|
||||
unsigned char lba_hi;
|
||||
unsigned char cyl_hi;
|
||||
};
|
||||
union {
|
||||
unsigned char device;
|
||||
unsigned char head;
|
||||
};
|
||||
|
||||
union {
|
||||
unsigned char lba_low_ex;
|
||||
unsigned char sector_ex;
|
||||
};
|
||||
union {
|
||||
unsigned char lba_mid_ex;
|
||||
unsigned char cyl_low_ex;
|
||||
};
|
||||
union {
|
||||
unsigned char lba_hi_ex;
|
||||
unsigned char cyl_hi_ex;
|
||||
};
|
||||
unsigned char features_ex;
|
||||
|
||||
unsigned char sect_count;
|
||||
unsigned char sect_cnt_ex;
|
||||
unsigned char res2;
|
||||
unsigned char control;
|
||||
|
||||
unsigned int res3;
|
||||
};
|
||||
|
||||
/* Command header structure. */
|
||||
struct mtip_cmd_hdr {
|
||||
/*
|
||||
* Command options.
|
||||
* - Bits 31:16 Number of PRD entries.
|
||||
* - Bits 15:8 Unused in this implementation.
|
||||
* - Bit 7 Prefetch bit, informs the drive to prefetch PRD entries.
|
||||
* - Bit 6 Write bit, should be set when writing data to the device.
|
||||
* - Bit 5 Unused in this implementation.
|
||||
* - Bits 4:0 Length of the command FIS in DWords (DWord = 4 bytes).
|
||||
*/
|
||||
unsigned int opts;
|
||||
/* This field is unsed when using NCQ. */
|
||||
union {
|
||||
unsigned int byte_count;
|
||||
unsigned int status;
|
||||
};
|
||||
/*
|
||||
* Lower 32 bits of the command table address associated with this
|
||||
* header. The command table addresses must be 128 byte aligned.
|
||||
*/
|
||||
unsigned int ctba;
|
||||
/*
|
||||
* If 64 bit addressing is used this field is the upper 32 bits
|
||||
* of the command table address associated with this command.
|
||||
*/
|
||||
unsigned int ctbau;
|
||||
/* Reserved and unused. */
|
||||
unsigned int res[4];
|
||||
};
|
||||
|
||||
/* Command scatter gather structure (PRD). */
|
||||
struct mtip_cmd_sg {
|
||||
/*
|
||||
* Low 32 bits of the data buffer address. For P320 this
|
||||
* address must be 8 byte aligned signified by bits 2:0 being
|
||||
* set to 0.
|
||||
*/
|
||||
unsigned int dba;
|
||||
/*
|
||||
* When 64 bit addressing is used this field is the upper
|
||||
* 32 bits of the data buffer address.
|
||||
*/
|
||||
unsigned int dba_upper;
|
||||
/* Unused. */
|
||||
unsigned int reserved;
|
||||
/*
|
||||
* Bit 31: interrupt when this data block has been transferred.
|
||||
* Bits 30..22: reserved
|
||||
* Bits 21..0: byte count (minus 1). For P320 the byte count must be
|
||||
* 8 byte aligned signified by bits 2:0 being set to 1.
|
||||
*/
|
||||
unsigned int info;
|
||||
};
|
||||
struct mtip_port;
|
||||
|
||||
/* Structure used to describe a command. */
|
||||
struct mtip_cmd {
|
||||
|
||||
struct mtip_cmd_hdr *command_header; /* ptr to command header entry */
|
||||
|
||||
dma_addr_t command_header_dma; /* corresponding physical address */
|
||||
|
||||
void *command; /* ptr to command table entry */
|
||||
|
||||
dma_addr_t command_dma; /* corresponding physical address */
|
||||
|
||||
void *comp_data; /* data passed to completion function comp_func() */
|
||||
/*
|
||||
* Completion function called by the ISR upon completion of
|
||||
* a command.
|
||||
*/
|
||||
void (*comp_func)(struct mtip_port *port,
|
||||
int tag,
|
||||
void *data,
|
||||
int status);
|
||||
/* Additional callback function that may be called by comp_func() */
|
||||
void (*async_callback)(void *data, int status);
|
||||
|
||||
void *async_data; /* Addl. data passed to async_callback() */
|
||||
|
||||
int scatter_ents; /* Number of scatter list entries used */
|
||||
|
||||
struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */
|
||||
|
||||
int retries; /* The number of retries left for this command. */
|
||||
|
||||
int direction; /* Data transfer direction */
|
||||
|
||||
unsigned long comp_time; /* command completion time, in jiffies */
|
||||
|
||||
atomic_t active; /* declares if this command sent to the drive. */
|
||||
};
|
||||
|
||||
/* Structure used to describe a port. */
|
||||
struct mtip_port {
|
||||
/* Pointer back to the driver data for this port. */
|
||||
struct driver_data *dd;
|
||||
/*
|
||||
* Used to determine if the data pointed to by the
|
||||
* identify field is valid.
|
||||
*/
|
||||
unsigned long identify_valid;
|
||||
/* Base address of the memory mapped IO for the port. */
|
||||
void __iomem *mmio;
|
||||
/* Array of pointers to the memory mapped s_active registers. */
|
||||
void __iomem *s_active[MTIP_MAX_SLOT_GROUPS];
|
||||
/* Array of pointers to the memory mapped completed registers. */
|
||||
void __iomem *completed[MTIP_MAX_SLOT_GROUPS];
|
||||
/* Array of pointers to the memory mapped Command Issue registers. */
|
||||
void __iomem *cmd_issue[MTIP_MAX_SLOT_GROUPS];
|
||||
/*
|
||||
* Pointer to the beginning of the command header memory as used
|
||||
* by the driver.
|
||||
*/
|
||||
void *command_list;
|
||||
/*
|
||||
* Pointer to the beginning of the command header memory as used
|
||||
* by the DMA.
|
||||
*/
|
||||
dma_addr_t command_list_dma;
|
||||
/*
|
||||
* Pointer to the beginning of the RX FIS memory as used
|
||||
* by the driver.
|
||||
*/
|
||||
void *rxfis;
|
||||
/*
|
||||
* Pointer to the beginning of the RX FIS memory as used
|
||||
* by the DMA.
|
||||
*/
|
||||
dma_addr_t rxfis_dma;
|
||||
/*
|
||||
* Pointer to the beginning of the command table memory as used
|
||||
* by the driver.
|
||||
*/
|
||||
void *command_table;
|
||||
/*
|
||||
* Pointer to the beginning of the command table memory as used
|
||||
* by the DMA.
|
||||
*/
|
||||
dma_addr_t command_tbl_dma;
|
||||
/*
|
||||
* Pointer to the beginning of the identify data memory as used
|
||||
* by the driver.
|
||||
*/
|
||||
u16 *identify;
|
||||
/*
|
||||
* Pointer to the beginning of the identify data memory as used
|
||||
* by the DMA.
|
||||
*/
|
||||
dma_addr_t identify_dma;
|
||||
/*
|
||||
* Pointer to the beginning of a sector buffer that is used
|
||||
* by the driver when issuing internal commands.
|
||||
*/
|
||||
u16 *sector_buffer;
|
||||
/*
|
||||
* Pointer to the beginning of a sector buffer that is used
|
||||
* by the DMA when the driver issues internal commands.
|
||||
*/
|
||||
dma_addr_t sector_buffer_dma;
|
||||
/*
|
||||
* Bit significant, used to determine if a command slot has
|
||||
* been allocated. i.e. the slot is in use. Bits are cleared
|
||||
* when the command slot and all associated data structures
|
||||
* are no longer needed.
|
||||
*/
|
||||
unsigned long allocated[SLOTBITS_IN_LONGS];
|
||||
/*
|
||||
* Array of command slots. Structure includes pointers to the
|
||||
* command header and command table, and completion function and data
|
||||
* pointers.
|
||||
*/
|
||||
struct mtip_cmd commands[MTIP_MAX_COMMAND_SLOTS];
|
||||
/* Non-zero if an internal command is in progress. */
|
||||
int internal_cmd_in_progress;
|
||||
/*
|
||||
* Timer used to complete commands that have been active for too long.
|
||||
*/
|
||||
struct timer_list cmd_timer;
|
||||
/*
|
||||
* Semaphore used to block threads if there are no
|
||||
* command slots available.
|
||||
*/
|
||||
struct semaphore cmd_slot;
|
||||
/* Spinlock for working around command-issue bug. */
|
||||
spinlock_t cmd_issue_lock;
|
||||
};
|
||||
|
||||
/*
|
||||
* Driver private data structure.
|
||||
*
|
||||
* One structure is allocated per probed device.
|
||||
*/
|
||||
struct driver_data {
|
||||
void __iomem *mmio; /* Base address of the HBA registers. */
|
||||
|
||||
int major; /* Major device number. */
|
||||
|
||||
int instance; /* Instance number. First device probed is 0, ... */
|
||||
|
||||
int protocol; /* FIXME: Protocol ops array index. */
|
||||
|
||||
struct gendisk *disk; /* Pointer to our gendisk structure. */
|
||||
|
||||
struct pci_dev *pdev; /* Pointer to the PCI device structure. */
|
||||
|
||||
struct request_queue *queue; /* Our request queue. */
|
||||
/*
|
||||
* Semaphore used to lock out read/write commands during the
|
||||
* execution of an internal command.
|
||||
*/
|
||||
struct rw_semaphore internal_sem;
|
||||
|
||||
struct mtip_port *port; /* Pointer to the port data structure. */
|
||||
|
||||
/* Tasklet used to process the bottom half of the ISR. */
|
||||
struct tasklet_struct tasklet;
|
||||
|
||||
unsigned product_type; /* magic value declaring the product type */
|
||||
|
||||
unsigned slot_groups; /* number of slot groups the product supports */
|
||||
|
||||
atomic_t drv_cleanup_done; /* Atomic variable for SRSI */
|
||||
|
||||
unsigned long index; /* Index to determine the disk name */
|
||||
|
||||
unsigned int ftlrebuildflag; /* FTL rebuild flag */
|
||||
|
||||
atomic_t resumeflag; /* Atomic variable to track suspend/resume */
|
||||
|
||||
atomic_t eh_active; /* Flag for error handling tracking */
|
||||
};
|
||||
|
||||
/* Function declarations */
|
||||
extern int mtip_block_initialize(struct driver_data *dd);
|
||||
extern int mtip_block_remove(struct driver_data *dd);
|
||||
extern int mtip_block_shutdown(struct driver_data *dd);
|
||||
extern int mtip_block_suspend(struct driver_data *dd);
|
||||
extern int mtip_block_resume(struct driver_data *dd);
|
||||
extern int mtip_hw_init(struct driver_data *dd);
|
||||
extern int mtip_hw_exit(struct driver_data *dd);
|
||||
extern int mtip_hw_shutdown(struct driver_data *dd);
|
||||
extern bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors);
|
||||
extern void mtip_hw_release_scatterlist(
|
||||
struct driver_data *dd,
|
||||
int tag);
|
||||
extern struct scatterlist *mtip_hw_get_scatterlist(
|
||||
struct driver_data *dd,
|
||||
int *tag);
|
||||
extern void mtip_hw_submit_io(struct driver_data *dd,
|
||||
sector_t start,
|
||||
int nsect,
|
||||
int nents,
|
||||
int tag,
|
||||
void *callback,
|
||||
void *data,
|
||||
int barrier,
|
||||
int dir);
|
||||
extern int mtip_hw_ioctl(struct driver_data *dd,
|
||||
unsigned int cmd,
|
||||
unsigned long arg,
|
||||
unsigned char compat);
|
||||
extern int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj);
|
||||
extern int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj);
|
||||
extern int mtip_hw_resume(struct driver_data *dd);
|
||||
extern int mtip_hw_suspend(struct driver_data *dd);
|
||||
void mtip_command_cleanup(struct driver_data *dd);
|
||||
bool mtip_check_surprise_removal(struct pci_dev *pdev);
|
||||
void mtip_restart_port(struct mtip_port *port);
|
||||
|
||||
#endif
|
||||
Загрузка…
Ссылка в новой задаче