diff options
Diffstat (limited to 'drivers/block/cciss.h')
| -rw-r--r-- | drivers/block/cciss.h | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h new file mode 100644 index 00000000..7fda30e4 --- /dev/null +++ b/drivers/block/cciss.h @@ -0,0 +1,435 @@ +#ifndef CCISS_H +#define CCISS_H + +#include <linux/genhd.h> +#include <linux/mutex.h> + +#include "cciss_cmd.h" + + +#define NWD_SHIFT 4 +#define MAX_PART (1 << NWD_SHIFT) + +#define IO_OK 0 +#define IO_ERROR 1 +#define IO_NEEDS_RETRY 3 + +#define VENDOR_LEN 8 +#define MODEL_LEN 16 +#define REV_LEN 4 + +struct ctlr_info; +typedef struct ctlr_info ctlr_info_t; + +struct access_method { + void (*submit_command)(ctlr_info_t *h, CommandList_struct *c); + void (*set_intr_mask)(ctlr_info_t *h, unsigned long val); + unsigned long (*fifo_full)(ctlr_info_t *h); + bool (*intr_pending)(ctlr_info_t *h); + unsigned long (*command_completed)(ctlr_info_t *h); +}; +typedef struct _drive_info_struct +{ + unsigned char LunID[8]; + int usage_count; + struct request_queue *queue; + sector_t nr_blocks; + int block_size; + int heads; + int sectors; + int cylinders; + int raid_level; /* set to -1 to indicate that + * the drive is not in use/configured + */ + int busy_configuring; /* This is set when a drive is being removed + * to prevent it from being opened or it's + * queue from being started. + */ + struct device dev; + __u8 serial_no[16]; /* from inquiry page 0x83, + * not necc. null terminated. + */ + char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */ + char model[MODEL_LEN + 1]; /* SCSI model string */ + char rev[REV_LEN + 1]; /* SCSI revision string */ + char device_initialized; /* indicates whether dev is initialized */ +} drive_info_struct; + +struct ctlr_info +{ + int ctlr; + char devname[8]; + char *product_name; + char firm_ver[4]; /* Firmware version */ + struct pci_dev *pdev; + __u32 board_id; + void __iomem *vaddr; + unsigned long paddr; + int nr_cmds; /* Number of commands allowed on this controller */ + CfgTable_struct __iomem *cfgtable; + int interrupts_enabled; + int major; + int max_commands; + int commands_outstanding; + int max_outstanding; /* Debug */ + int num_luns; + int highest_lun; + int usage_count; /* number of opens all all minor devices */ + /* Need space for temp sg list + * number of scatter/gathers supported + * number of scatter/gathers in chained block + */ + struct scatterlist **scatter_list; + int maxsgentries; + int chainsize; + int max_cmd_sgentries; + SGDescriptor_struct **cmd_sg_list; + +# define PERF_MODE_INT 0 +# define DOORBELL_INT 1 +# define SIMPLE_MODE_INT 2 +# define MEMQ_MODE_INT 3 + unsigned int intr[4]; + unsigned int msix_vector; + unsigned int msi_vector; + int intr_mode; + int cciss_max_sectors; + BYTE cciss_read; + BYTE cciss_write; + BYTE cciss_read_capacity; + + /* information about each logical volume */ + drive_info_struct *drv[CISS_MAX_LUN]; + + struct access_method access; + + /* queue and queue Info */ + struct list_head reqQ; + struct list_head cmpQ; + unsigned int Qdepth; + unsigned int maxQsinceinit; + unsigned int maxSG; + spinlock_t lock; + + /* pointers to command and error info pool */ + CommandList_struct *cmd_pool; + dma_addr_t cmd_pool_dhandle; + ErrorInfo_struct *errinfo_pool; + dma_addr_t errinfo_pool_dhandle; + unsigned long *cmd_pool_bits; + int nr_allocs; + int nr_frees; + int busy_configuring; + int busy_initializing; + int busy_scanning; + struct mutex busy_shutting_down; + + /* This element holds the zero based queue number of the last + * queue to be started. It is used for fairness. + */ + int next_to_run; + + /* Disk structures we need to pass back */ + struct gendisk *gendisk[CISS_MAX_LUN]; +#ifdef CONFIG_CISS_SCSI_TAPE + struct cciss_scsi_adapter_data_t *scsi_ctlr; +#endif + unsigned char alive; + struct list_head scan_list; + struct completion scan_wait; + struct device dev; + /* + * Performant mode tables. + */ + u32 trans_support; + u32 trans_offset; + struct TransTable_struct *transtable; + unsigned long transMethod; + + /* + * Performant mode completion buffer + */ + u64 *reply_pool; + dma_addr_t reply_pool_dhandle; + u64 *reply_pool_head; + size_t reply_pool_size; + unsigned char reply_pool_wraparound; + u32 *blockFetchTable; +}; + +/* Defining the diffent access_methods + * + * Memory mapped FIFO interface (SMART 53xx cards) + */ +#define SA5_DOORBELL 0x20 +#define SA5_REQUEST_PORT_OFFSET 0x40 +#define SA5_REPLY_INTR_MASK_OFFSET 0x34 +#define SA5_REPLY_PORT_OFFSET 0x44 +#define SA5_INTR_STATUS 0x30 +#define SA5_SCRATCHPAD_OFFSET 0xB0 + +#define SA5_CTCFG_OFFSET 0xB4 +#define SA5_CTMEM_OFFSET 0xB8 + +#define SA5_INTR_OFF 0x08 +#define SA5B_INTR_OFF 0x04 +#define SA5_INTR_PENDING 0x08 +#define SA5B_INTR_PENDING 0x04 +#define FIFO_EMPTY 0xffffffff +#define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */ +/* Perf. mode flags */ +#define SA5_PERF_INTR_PENDING 0x04 +#define SA5_PERF_INTR_OFF 0x05 +#define SA5_OUTDB_STATUS_PERF_BIT 0x01 +#define SA5_OUTDB_CLEAR_PERF_BIT 0x01 +#define SA5_OUTDB_CLEAR 0xA0 +#define SA5_OUTDB_CLEAR_PERF_BIT 0x01 +#define SA5_OUTDB_STATUS 0x9C + + +#define CISS_ERROR_BIT 0x02 + +#define CCISS_INTR_ON 1 +#define CCISS_INTR_OFF 0 + + +/* CCISS_BOARD_READY_WAIT_SECS is how long to wait for a board + * to become ready, in seconds, before giving up on it. + * CCISS_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait + * between polling the board to see if it is ready, in + * milliseconds. CCISS_BOARD_READY_ITERATIONS is derived + * the above. + */ +#define CCISS_BOARD_READY_WAIT_SECS (120) +#define CCISS_BOARD_NOT_READY_WAIT_SECS (100) +#define CCISS_BOARD_READY_POLL_INTERVAL_MSECS (100) +#define CCISS_BOARD_READY_ITERATIONS \ + ((CCISS_BOARD_READY_WAIT_SECS * 1000) / \ + CCISS_BOARD_READY_POLL_INTERVAL_MSECS) +#define CCISS_BOARD_NOT_READY_ITERATIONS \ + ((CCISS_BOARD_NOT_READY_WAIT_SECS * 1000) / \ + CCISS_BOARD_READY_POLL_INTERVAL_MSECS) +#define CCISS_POST_RESET_PAUSE_MSECS (3000) +#define CCISS_POST_RESET_NOOP_INTERVAL_MSECS (4000) +#define CCISS_POST_RESET_NOOP_RETRIES (12) +#define CCISS_POST_RESET_NOOP_TIMEOUT_MSECS (10000) + +/* + Send the command to the hardware +*/ +static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c) +{ +#ifdef CCISS_DEBUG + printk(KERN_WARNING "cciss%d: Sending %08x - down to controller\n", + h->ctlr, c->busaddr); +#endif /* CCISS_DEBUG */ + writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET); + readl(h->vaddr + SA5_SCRATCHPAD_OFFSET); + h->commands_outstanding++; + if ( h->commands_outstanding > h->max_outstanding) + h->max_outstanding = h->commands_outstanding; +} + +/* + * This card is the opposite of the other cards. + * 0 turns interrupts on... + * 0x08 turns them off... + */ +static void SA5_intr_mask(ctlr_info_t *h, unsigned long val) +{ + if (val) + { /* Turn interrupts on */ + h->interrupts_enabled = 1; + writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } else /* Turn them off */ + { + h->interrupts_enabled = 0; + writel( SA5_INTR_OFF, + h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } +} +/* + * This card is the opposite of the other cards. + * 0 turns interrupts on... + * 0x04 turns them off... + */ +static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val) +{ + if (val) + { /* Turn interrupts on */ + h->interrupts_enabled = 1; + writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } else /* Turn them off */ + { + h->interrupts_enabled = 0; + writel( SA5B_INTR_OFF, + h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } +} + +/* Performant mode intr_mask */ +static void SA5_performant_intr_mask(ctlr_info_t *h, unsigned long val) +{ + if (val) { /* turn on interrupts */ + h->interrupts_enabled = 1; + writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } else { + h->interrupts_enabled = 0; + writel(SA5_PERF_INTR_OFF, + h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET); + } +} + +/* + * Returns true if fifo is full. + * + */ +static unsigned long SA5_fifo_full(ctlr_info_t *h) +{ + if( h->commands_outstanding >= h->max_commands) + return(1); + else + return(0); + +} +/* + * returns value read from hardware. + * returns FIFO_EMPTY if there is nothing to read + */ +static unsigned long SA5_completed(ctlr_info_t *h) +{ + unsigned long register_value + = readl(h->vaddr + SA5_REPLY_PORT_OFFSET); + if(register_value != FIFO_EMPTY) + { + h->commands_outstanding--; +#ifdef CCISS_DEBUG + printk("cciss: Read %lx back from board\n", register_value); +#endif /* CCISS_DEBUG */ + } +#ifdef CCISS_DEBUG + else + { + printk("cciss: FIFO Empty read\n"); + } +#endif + return ( register_value); + +} + +/* Performant mode command completed */ +static unsigned long SA5_performant_completed(ctlr_info_t *h) +{ + unsigned long register_value = FIFO_EMPTY; + + /* flush the controller write of the reply queue by reading + * outbound doorbell status register. + */ + register_value = readl(h->vaddr + SA5_OUTDB_STATUS); + /* msi auto clears the interrupt pending bit. */ + if (!(h->msi_vector || h->msix_vector)) { + writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR); + /* Do a read in order to flush the write to the controller + * (as per spec.) + */ + register_value = readl(h->vaddr + SA5_OUTDB_STATUS); + } + + if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { + register_value = *(h->reply_pool_head); + (h->reply_pool_head)++; + h->commands_outstanding--; + } else { + register_value = FIFO_EMPTY; + } + /* Check for wraparound */ + if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { + h->reply_pool_head = h->reply_pool; + h->reply_pool_wraparound ^= 1; + } + + return register_value; +} +/* + * Returns true if an interrupt is pending.. + */ +static bool SA5_intr_pending(ctlr_info_t *h) +{ + unsigned long register_value = + readl(h->vaddr + SA5_INTR_STATUS); +#ifdef CCISS_DEBUG + printk("cciss: intr_pending %lx\n", register_value); +#endif /* CCISS_DEBUG */ + if( register_value & SA5_INTR_PENDING) + return 1; + return 0 ; +} + +/* + * Returns true if an interrupt is pending.. + */ +static bool SA5B_intr_pending(ctlr_info_t *h) +{ + unsigned long register_value = + readl(h->vaddr + SA5_INTR_STATUS); +#ifdef CCISS_DEBUG + printk("cciss: intr_pending %lx\n", register_value); +#endif /* CCISS_DEBUG */ + if( register_value & SA5B_INTR_PENDING) + return 1; + return 0 ; +} + +static bool SA5_performant_intr_pending(ctlr_info_t *h) +{ + unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS); + + if (!register_value) + return false; + + if (h->msi_vector || h->msix_vector) + return true; + + /* Read outbound doorbell to flush */ + register_value = readl(h->vaddr + SA5_OUTDB_STATUS); + return register_value & SA5_OUTDB_STATUS_PERF_BIT; +} + +static struct access_method SA5_access = { + SA5_submit_command, + SA5_intr_mask, + SA5_fifo_full, + SA5_intr_pending, + SA5_completed, +}; + +static struct access_method SA5B_access = { + SA5_submit_command, + SA5B_intr_mask, + SA5_fifo_full, + SA5B_intr_pending, + SA5_completed, +}; + +static struct access_method SA5_performant_access = { + SA5_submit_command, + SA5_performant_intr_mask, + SA5_fifo_full, + SA5_performant_intr_pending, + SA5_performant_completed, +}; + +struct board_type { + __u32 board_id; + char *product_name; + struct access_method *access; + int nr_cmds; /* Max cmds this kind of ctlr can handle. */ +}; + +#endif /* CCISS_H */ |