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kernel_optimize_test/drivers/block/mtip32xx/mtip32xx.h
Christoph Hellwig 2a842acab1 block: introduce new block status code type 
Currently we use nornal Linux errno values in the block layer, and while
we accept any error a few have overloaded magic meanings.  This patch
instead introduces a new  blk_status_t value that holds block layer specific
status codes and explicitly explains their meaning.  Helpers to convert from
and to the previous special meanings are provided for now, but I suspect
we want to get rid of them in the long run - those drivers that have a
errno input (e.g. networking) usually get errnos that don't know about
the special block layer overloads, and similarly returning them to userspace
will usually return somethings that strictly speaking isn't correct
for file system operations, but that's left as an exercise for later.

For now the set of errors is a very limited set that closely corresponds
to the previous overloaded errno values, but there is some low hanging
fruite to improve it.

blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse
typechecking, so that we can easily catch places passing the wrong values.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09 09:27:32 -06:00

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/*
* 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>
/* 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
/* check for erase mode support during secure erase */
#define MTIP_SEC_ERASE_MODE 0x2
/* # 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 0xED51
#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 & 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 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 0x1344
#define P320H_DEVICE_ID 0x5150
#define P320M_DEVICE_ID 0x5151
#define P320S_DEVICE_ID 0x5152
#define P325M_DEVICE_ID 0x5153
#define P420H_DEVICE_ID 0x5160
#define P420M_DEVICE_ID 0x5161
#define P425M_DEVICE_ID 0x5163
/* 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
#define __force_bit2int (unsigned int __force)
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_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_REMOVAL_BIT = 9,
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;
u16 flags;
u8 cur;
u8 worst;
u32 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); \
}
#define MTIP_TRIM_TIMEOUT_MS 240000
#define MTIP_MAX_TRIM_ENTRIES 8
#define MTIP_MAX_TRIM_ENTRY_LEN 0xfff8
struct mtip_trim_entry {
u32 lba; /* starting lba of region */
u16 rsvd; /* unused */
u16 range; /* # of 512b blocks to trim */
} __packed;
struct mtip_trim {
/* Array of regions to trim */
struct mtip_trim_entry entry[MTIP_MAX_TRIM_ENTRIES];
} __packed;
/* 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 */
int scatter_ents; /* Number of scatter list entries used */
int unaligned; /* command is unaligned on 4k boundary */
struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */
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;
/* Semaphore to control queue depth of unaligned IOs */
struct semaphore 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 trim_supp; /* flag indicating trim support */
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;
struct block_device *bdev;
struct list_head online_list; /* linkage for online list */
struct list_head remove_list; /* linkage for removing list */
int unal_qdepth; /* qdepth of unaligned IO queue */
};
#endif
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