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linux/drivers/block/rsxx/rsxx_priv.h
Philip J Kelleher c206c70924 block: IBM RamSan 70/80 driver fixes 
This patch includes the following driver fixes for the
IBM RamSan 70/80 driver:

o Changed the creg_ctrl lock from a mutex to a spinlock.
o Added a count check for ioctl calls.
o Removed unnecessary casting of void pointers.
o Made every function static that needed to be.
o Added comments to explain things more thoroughly.

Signed-off-by: Philip J Kelleher <pjk1939@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-02-18 21:35:59 +01:00

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/*
* Filename: rsxx_priv.h
*
*
* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
*
* (C) Copyright 2013 IBM Corporation
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __RSXX_PRIV_H__
#define __RSXX_PRIV_H__
#include <linux/version.h>
#include <linux/semaphore.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
#include <linux/workqueue.h>
#include <linux/bio.h>
#include <linux/vmalloc.h>
#include <linux/timer.h>
#include <linux/ioctl.h>
#include "rsxx.h"
#include "rsxx_cfg.h"
struct proc_cmd;
#define PCI_VENDOR_ID_TMS_IBM 0x15B6
#define PCI_DEVICE_ID_RS70_FLASH 0x0019
#define PCI_DEVICE_ID_RS70D_FLASH 0x001A
#define PCI_DEVICE_ID_RS80_FLASH 0x001C
#define PCI_DEVICE_ID_RS81_FLASH 0x001E
#define RS70_PCI_REV_SUPPORTED 4
#define DRIVER_NAME "rsxx"
#define DRIVER_VERSION "3.7"
/* Block size is 4096 */
#define RSXX_HW_BLK_SHIFT 12
#define RSXX_HW_BLK_SIZE (1 << RSXX_HW_BLK_SHIFT)
#define RSXX_HW_BLK_MASK (RSXX_HW_BLK_SIZE - 1)
#define MAX_CREG_DATA8 32
#define LOG_BUF_SIZE8 128
#define RSXX_MAX_OUTSTANDING_CMDS 255
#define RSXX_CS_IDX_MASK 0xff
#define RSXX_MAX_TARGETS 8
struct dma_tracker_list;
/* DMA Command/Status Buffer structure */
struct rsxx_cs_buffer {
dma_addr_t dma_addr;
void *buf;
u32 idx;
};
struct rsxx_dma_stats {
u32 crc_errors;
u32 hard_errors;
u32 soft_errors;
u32 writes_issued;
u32 writes_failed;
u32 reads_issued;
u32 reads_failed;
u32 reads_retried;
u32 discards_issued;
u32 discards_failed;
u32 done_rescheduled;
u32 issue_rescheduled;
u32 sw_q_depth; /* Number of DMAs on the SW queue. */
atomic_t hw_q_depth; /* Number of DMAs queued to HW. */
};
struct rsxx_dma_ctrl {
struct rsxx_cardinfo *card;
int id;
void __iomem *regmap;
struct rsxx_cs_buffer status;
struct rsxx_cs_buffer cmd;
u16 e_cnt;
spinlock_t queue_lock;
struct list_head queue;
struct workqueue_struct *issue_wq;
struct work_struct issue_dma_work;
struct workqueue_struct *done_wq;
struct work_struct dma_done_work;
struct timer_list activity_timer;
struct dma_tracker_list *trackers;
struct rsxx_dma_stats stats;
};
struct rsxx_cardinfo {
struct pci_dev *dev;
unsigned int halt;
void __iomem *regmap;
spinlock_t irq_lock;
unsigned int isr_mask;
unsigned int ier_mask;
struct rsxx_card_cfg config;
int config_valid;
/* Embedded CPU Communication */
struct {
spinlock_t lock;
bool active;
struct creg_cmd *active_cmd;
struct work_struct done_work;
struct list_head queue;
unsigned int q_depth;
/* Cache the creg status to prevent ioreads */
struct {
u32 stat;
u32 failed_cancel_timer;
u32 creg_timeout;
} creg_stats;
struct timer_list cmd_timer;
struct mutex reset_lock;
int reset;
} creg_ctrl;
struct {
char tmp[MAX_CREG_DATA8];
char buf[LOG_BUF_SIZE8]; /* terminated */
int buf_len;
} log;
struct work_struct event_work;
unsigned int state;
u64 size8;
/* Lock the device attach/detach function */
struct mutex dev_lock;
/* Block Device Variables */
bool bdev_attached;
int disk_id;
int major;
struct request_queue *queue;
struct gendisk *gendisk;
struct {
/* Used to convert a byte address to a device address. */
u64 lower_mask;
u64 upper_shift;
u64 upper_mask;
u64 target_mask;
u64 target_shift;
} _stripe;
unsigned int dma_fault;
int scrub_hard;
int n_targets;
struct rsxx_dma_ctrl *ctrl;
};
enum rsxx_pci_regmap {
HWID = 0x00, /* Hardware Identification Register */
SCRATCH = 0x04, /* Scratch/Debug Register */
RESET = 0x08, /* Reset Register */
ISR = 0x10, /* Interrupt Status Register */
IER = 0x14, /* Interrupt Enable Register */
IPR = 0x18, /* Interrupt Poll Register */
CB_ADD_LO = 0x20, /* Command Host Buffer Address [31:0] */
CB_ADD_HI = 0x24, /* Command Host Buffer Address [63:32]*/
HW_CMD_IDX = 0x28, /* Hardware Processed Command Index */
SW_CMD_IDX = 0x2C, /* Software Processed Command Index */
SB_ADD_LO = 0x30, /* Status Host Buffer Address [31:0] */
SB_ADD_HI = 0x34, /* Status Host Buffer Address [63:32] */
HW_STATUS_CNT = 0x38, /* Hardware Status Counter */
SW_STATUS_CNT = 0x3C, /* Deprecated */
CREG_CMD = 0x40, /* CPU Command Register */
CREG_ADD = 0x44, /* CPU Address Register */
CREG_CNT = 0x48, /* CPU Count Register */
CREG_STAT = 0x4C, /* CPU Status Register */
CREG_DATA0 = 0x50, /* CPU Data Registers */
CREG_DATA1 = 0x54,
CREG_DATA2 = 0x58,
CREG_DATA3 = 0x5C,
CREG_DATA4 = 0x60,
CREG_DATA5 = 0x64,
CREG_DATA6 = 0x68,
CREG_DATA7 = 0x6c,
INTR_COAL = 0x70, /* Interrupt Coalescing Register */
HW_ERROR = 0x74, /* Card Error Register */
PCI_DEBUG0 = 0x78, /* PCI Debug Registers */
PCI_DEBUG1 = 0x7C,
PCI_DEBUG2 = 0x80,
PCI_DEBUG3 = 0x84,
PCI_DEBUG4 = 0x88,
PCI_DEBUG5 = 0x8C,
PCI_DEBUG6 = 0x90,
PCI_DEBUG7 = 0x94,
PCI_POWER_THROTTLE = 0x98,
PERF_CTRL = 0x9c,
PERF_TIMER_LO = 0xa0,
PERF_TIMER_HI = 0xa4,
PERF_RD512_LO = 0xa8,
PERF_RD512_HI = 0xac,
PERF_WR512_LO = 0xb0,
PERF_WR512_HI = 0xb4,
};
enum rsxx_intr {
CR_INTR_DMA0 = 0x00000001,
CR_INTR_CREG = 0x00000002,
CR_INTR_DMA1 = 0x00000004,
CR_INTR_EVENT = 0x00000008,
CR_INTR_DMA2 = 0x00000010,
CR_INTR_DMA3 = 0x00000020,
CR_INTR_DMA4 = 0x00000040,
CR_INTR_DMA5 = 0x00000080,
CR_INTR_DMA6 = 0x00000100,
CR_INTR_DMA7 = 0x00000200,
CR_INTR_DMA_ALL = 0x000003f5,
CR_INTR_ALL = 0xffffffff,
};
static inline int CR_INTR_DMA(int N)
{
static const unsigned int _CR_INTR_DMA[] = {
CR_INTR_DMA0, CR_INTR_DMA1, CR_INTR_DMA2, CR_INTR_DMA3,
CR_INTR_DMA4, CR_INTR_DMA5, CR_INTR_DMA6, CR_INTR_DMA7
};
return _CR_INTR_DMA[N];
}
enum rsxx_pci_reset {
DMA_QUEUE_RESET = 0x00000001,
};
enum rsxx_pci_revision {
RSXX_DISCARD_SUPPORT = 2,
};
enum rsxx_creg_cmd {
CREG_CMD_TAG_MASK = 0x0000FF00,
CREG_OP_WRITE = 0x000000C0,
CREG_OP_READ = 0x000000E0,
};
enum rsxx_creg_addr {
CREG_ADD_CARD_CMD = 0x80001000,
CREG_ADD_CARD_STATE = 0x80001004,
CREG_ADD_CARD_SIZE = 0x8000100c,
CREG_ADD_CAPABILITIES = 0x80001050,
CREG_ADD_LOG = 0x80002000,
CREG_ADD_NUM_TARGETS = 0x80003000,
CREG_ADD_CONFIG = 0xB0000000,
};
enum rsxx_creg_card_cmd {
CARD_CMD_STARTUP = 1,
CARD_CMD_SHUTDOWN = 2,
CARD_CMD_LOW_LEVEL_FORMAT = 3,
CARD_CMD_FPGA_RECONFIG_BR = 4,
CARD_CMD_FPGA_RECONFIG_MAIN = 5,
CARD_CMD_BACKUP = 6,
CARD_CMD_RESET = 7,
CARD_CMD_deprecated = 8,
CARD_CMD_UNINITIALIZE = 9,
CARD_CMD_DSTROY_EMERGENCY = 10,
CARD_CMD_DSTROY_NORMAL = 11,
CARD_CMD_DSTROY_EXTENDED = 12,
CARD_CMD_DSTROY_ABORT = 13,
};
enum rsxx_card_state {
CARD_STATE_SHUTDOWN = 0x00000001,
CARD_STATE_STARTING = 0x00000002,
CARD_STATE_FORMATTING = 0x00000004,
CARD_STATE_UNINITIALIZED = 0x00000008,
CARD_STATE_GOOD = 0x00000010,
CARD_STATE_SHUTTING_DOWN = 0x00000020,
CARD_STATE_FAULT = 0x00000040,
CARD_STATE_RD_ONLY_FAULT = 0x00000080,
CARD_STATE_DSTROYING = 0x00000100,
};
enum rsxx_led {
LED_DEFAULT = 0x0,
LED_IDENTIFY = 0x1,
LED_SOAK = 0x2,
};
enum rsxx_creg_flash_lock {
CREG_FLASH_LOCK = 1,
CREG_FLASH_UNLOCK = 2,
};
enum rsxx_card_capabilities {
CARD_CAP_SUBPAGE_WRITES = 0x00000080,
};
enum rsxx_creg_stat {
CREG_STAT_STATUS_MASK = 0x00000003,
CREG_STAT_SUCCESS = 0x1,
CREG_STAT_ERROR = 0x2,
CREG_STAT_CHAR_PENDING = 0x00000004, /* Character I/O pending bit */
CREG_STAT_LOG_PENDING = 0x00000008, /* HW log message pending bit */
CREG_STAT_TAG_MASK = 0x0000ff00,
};
static inline unsigned int CREG_DATA(int N)
{
return CREG_DATA0 + (N << 2);
}
/*----------------- Convenient Log Wrappers -------------------*/
#define CARD_TO_DEV(__CARD) (&(__CARD)->dev->dev)
/***** config.c *****/
int rsxx_load_config(struct rsxx_cardinfo *card);
/***** core.c *****/
void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr);
void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr);
void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card,
unsigned int intr);
void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card,
unsigned int intr);
/***** dev.c *****/
int rsxx_attach_dev(struct rsxx_cardinfo *card);
void rsxx_detach_dev(struct rsxx_cardinfo *card);
int rsxx_setup_dev(struct rsxx_cardinfo *card);
void rsxx_destroy_dev(struct rsxx_cardinfo *card);
int rsxx_dev_init(void);
void rsxx_dev_cleanup(void);
/***** dma.c ****/
typedef void (*rsxx_dma_cb)(struct rsxx_cardinfo *card,
void *cb_data,
unsigned int status);
int rsxx_dma_setup(struct rsxx_cardinfo *card);
void rsxx_dma_destroy(struct rsxx_cardinfo *card);
int rsxx_dma_init(void);
void rsxx_dma_cleanup(void);
int rsxx_dma_queue_bio(struct rsxx_cardinfo *card,
struct bio *bio,
atomic_t *n_dmas,
rsxx_dma_cb cb,
void *cb_data);
/***** cregs.c *****/
int rsxx_creg_write(struct rsxx_cardinfo *card, u32 addr,
unsigned int size8,
void *data,
int byte_stream);
int rsxx_creg_read(struct rsxx_cardinfo *card,
u32 addr,
unsigned int size8,
void *data,
int byte_stream);
int rsxx_read_hw_log(struct rsxx_cardinfo *card);
int rsxx_get_card_state(struct rsxx_cardinfo *card,
unsigned int *state);
int rsxx_get_card_size8(struct rsxx_cardinfo *card, u64 *size8);
int rsxx_get_num_targets(struct rsxx_cardinfo *card,
unsigned int *n_targets);
int rsxx_get_card_capabilities(struct rsxx_cardinfo *card,
u32 *capabilities);
int rsxx_issue_card_cmd(struct rsxx_cardinfo *card, u32 cmd);
int rsxx_creg_setup(struct rsxx_cardinfo *card);
void rsxx_creg_destroy(struct rsxx_cardinfo *card);
int rsxx_creg_init(void);
void rsxx_creg_cleanup(void);
int rsxx_reg_access(struct rsxx_cardinfo *card,
struct rsxx_reg_access __user *ucmd,
int read);
#endif /* __DRIVERS_BLOCK_RSXX_H__ */
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