Quelle mtip32xx.h
Sprache: C
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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 .
*/
#ifndef __MTIP32XX_H__
#define __MTIP32XX_H__
#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/ata.h>
#include <linux/interrupt.h>
/* Offset of Subsystem Device ID in pci confoguration space */
#define PCI_SUBSYSTEM_DEVICEID 0 x2E
/* offset of Device Control register in PCIe extended capabilites space */
#define PCIE_CONFIG_EXT_DEVICE_CONTROL_OFFSET 0 x48
/* check for erase mode support during secure erase */
#define MTIP_SEC_ERASE_MODE 0 x2
/* # of times to retry timed out/failed IOs */
#define MTIP_MAX_RETRIES 2
/* Various timeout values in ms */
#define MTIP_NCQ_CMD_TIMEOUT_MS 15000
#define MTIP_IOCTL_CMD_TIMEOUT_MS 5000
#define MTIP_INT_CMD_TIMEOUT_MS 5000
#define MTIP_QUIESCE_IO_TIMEOUT_MS (MTIP_NCQ_CMD_TIMEOUT_MS * \
(MTIP_MAX_RETRIES + 1 ))
/* check for timeouts every 500ms */
#define MTIP_TIMEOUT_CHECK_PERIOD 500
/* ftl rebuild */
#define MTIP_FTL_REBUILD_OFFSET 142
#define MTIP_FTL_REBUILD_MAGIC 0 xED51
#define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
/* unaligned IO handling */
#define MTIP_MAX_UNALIGNED_SLOTS 2
/* Macro to extract the tag bit number from a tag value. */
#define MTIP_TAG_BIT(tag) (tag & 0 x1F)
/*
* 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 504
/*
* 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 0 x1344
#define P320H_DEVICE_ID 0 x5150
#define P320M_DEVICE_ID 0 x5151
#define P320S_DEVICE_ID 0 x5152
#define P325M_DEVICE_ID 0 x5153
#define P420H_DEVICE_ID 0 x5160
#define P420M_DEVICE_ID 0 x5161
#define P425M_DEVICE_ID 0 x5163
/* Driver name and version strings */
#define MTIP_DRV_NAME "mtip32xx"
#define MTIP_DRV_VERSION "1.3.1"
/* 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
#ifdef DEBUG
#define dbg_printk(format, arg...) \
printk(pr_fmt(format), ## arg);
#else
#define dbg_printk(format, arg...)
#endif
#define MTIP_DFS_MAX_BUF_SIZE 1024
enum {
/* below are bit numbers in 'flags' defined in mtip_port */
MTIP_PF_IC_ACTIVE_BIT = 0 , /* pio/ioctl */
MTIP_PF_EH_ACTIVE_BIT = 1 , /* error handling */
MTIP_PF_SE_ACTIVE_BIT = 2 , /* secure erase */
MTIP_PF_DM_ACTIVE_BIT = 3 , /* download microcde */
MTIP_PF_TO_ACTIVE_BIT = 9 , /* timeout handling */
MTIP_PF_PAUSE_IO = ((1 << MTIP_PF_IC_ACTIVE_BIT) |
(1 << MTIP_PF_EH_ACTIVE_BIT) |
(1 << MTIP_PF_SE_ACTIVE_BIT) |
(1 << MTIP_PF_DM_ACTIVE_BIT) |
(1 << MTIP_PF_TO_ACTIVE_BIT)),
MTIP_PF_HOST_CAP_64 = 10 , /* cache HOST_CAP_64 */
MTIP_PF_SVC_THD_ACTIVE_BIT = 4 ,
MTIP_PF_ISSUE_CMDS_BIT = 5 ,
MTIP_PF_REBUILD_BIT = 6 ,
MTIP_PF_SVC_THD_STOP_BIT = 8 ,
MTIP_PF_SVC_THD_WORK = ((1 << MTIP_PF_EH_ACTIVE_BIT) |
(1 << MTIP_PF_ISSUE_CMDS_BIT) |
(1 << MTIP_PF_REBUILD_BIT) |
(1 << MTIP_PF_SVC_THD_STOP_BIT) |
(1 << MTIP_PF_TO_ACTIVE_BIT)),
/* below are bit numbers in 'dd_flag' defined in driver_data */
MTIP_DDF_SEC_LOCK_BIT = 0 ,
MTIP_DDF_REMOVE_PENDING_BIT = 1 ,
MTIP_DDF_OVER_TEMP_BIT = 2 ,
MTIP_DDF_WRITE_PROTECT_BIT = 3 ,
MTIP_DDF_CLEANUP_BIT = 5 ,
MTIP_DDF_RESUME_BIT = 6 ,
MTIP_DDF_INIT_DONE_BIT = 7 ,
MTIP_DDF_REBUILD_FAILED_BIT = 8 ,
MTIP_DDF_STOP_IO = ((1 << MTIP_DDF_REMOVE_PENDING_BIT) |
(1 << MTIP_DDF_SEC_LOCK_BIT) |
(1 << MTIP_DDF_OVER_TEMP_BIT) |
(1 << MTIP_DDF_WRITE_PROTECT_BIT) |
(1 << MTIP_DDF_REBUILD_FAILED_BIT)),
};
struct smart_attr {
u8 attr_id;
__le16 flags;
u8 cur;
u8 worst;
__le32 data;
u8 res[3 ];
} __packed;
struct mtip_work {
struct work_struct work;
void *port;
int cpu_binding;
u32 completed;
} ____cacheline_aligned_in_smp;
#define DEFINE_HANDLER(group) \
void mtip_workq_sdbf## group(struct work_struct *work) \
{ \
struct mtip_work *w = (struct mtip_work *) work; \
mtip_workq_sdbfx(w->port, group, w->completed); \
}
/* Register Frame Information Structure (FIS), host to device. */
struct host_to_dev_fis {
/*
* FIS type .
* - 27 h Register FIS , host to device .
* - 34 h Register FIS , device to host .
* - 39 h DMA Activate FIS , device to host .
* - 41 h DMA Setup FIS , bi - directional .
* - 46 h Data FIS , bi - directional .
* - 58 h BIST Activate FIS , bi - directional .
* - 5 Fh 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 ) .
*/
__le32 opts;
/* This field is unsed when using NCQ. */
union {
__le32 byte_count;
__le32 status;
};
/*
* Lower 32 bits of the command table address associated with this
* header . The command table addresses must be 128 byte aligned .
*/
__le32 ctba;
/*
* If 64 bit addressing is used this field is the upper 32 bits
* of the command table address associated with this command .
*/
__le32 ctbau;
/* Reserved and unused. */
u32 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 .
*/
__le32 dba;
/*
* When 64 bit addressing is used this field is the upper
* 32 bits of the data buffer address .
*/
__le32 dba_upper;
/* Unused. */
__le32 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 .
*/
__le32 info;
};
struct mtip_port;
struct mtip_int_cmd;
/* Structure used to describe a command. */
struct mtip_cmd {
void *command; /* ptr to command table entry */
dma_addr_t command_dma; /* corresponding physical address */
int scatter_ents; /* Number of scatter list entries used */
int unaligned; /* command is unaligned on 4k boundary */
union {
struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */
struct mtip_int_cmd *icmd;
};
int retries; /* The number of retries left for this command. */
int direction; /* Data transfer direction */
blk_status_t status;
};
/* 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 DMA region for RX Fis , Identify , RLE10 , and SMART
*/
void *block1;
/*
* DMA address of region for RX Fis , Identify , RLE10 , and SMART
*/
dma_addr_t block1_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;
u16 *log_buf;
dma_addr_t log_buf_dma;
u8 *smart_buf;
dma_addr_t smart_buf_dma;
/*
* used to queue commands when an internal command is in progress
* or error handling is active
*/
unsigned long cmds_to_issue[SLOTBITS_IN_LONGS];
/* Used by mtip_service_thread to wait for an event */
wait_queue_head_t svc_wait;
/*
* indicates the state of the port . Also , helps the service thread
* to determine its action on wake up .
*/
unsigned long flags;
/*
* Timer used to complete commands that have been active for too long .
*/
unsigned long ic_pause_timer;
/* Counter to control queue depth of unaligned IOs */
atomic_t cmd_slot_unal;
/* Spinlock for working around command-issue bug. */
spinlock_t cmd_issue_lock[MTIP_MAX_SLOT_GROUPS];
};
/*
* 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, ... */
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. */
struct blk_mq_tag_set tags; /* blk_mq tags */
struct mtip_port *port; /* Pointer to the port data structure. */
unsigned product_type; /* magic value declaring the product type */
unsigned slot_groups; /* number of slot groups the product supports */
unsigned long index; /* Index to determine the disk name */
unsigned long dd_flag; /* NOTE: use atomic bit operations on this */
struct task_struct *mtip_svc_handler; /* task_struct of svc thd */
struct dentry *dfs_node;
bool sr;
int numa_node; /* NUMA support */
char workq_name[32 ];
struct workqueue_struct *isr_workq;
atomic_t irq_workers_active;
struct mtip_work work[MTIP_MAX_SLOT_GROUPS];
int isr_binding;
int unal_qdepth; /* qdepth of unaligned IO queue */
};
#endif
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2026-10-11
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