diff options
Diffstat (limited to 'drivers/block/cciss.h')
| -rw-r--r-- | drivers/block/cciss.h | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h new file mode 100644 index 000000000000..8fb19206eddb --- /dev/null +++ b/drivers/block/cciss.h @@ -0,0 +1,266 @@ +#ifndef CCISS_H +#define CCISS_H + +#include <linux/genhd.h> + +#include "cciss_cmd.h" + + +#define NWD 16 +#define NWD_SHIFT 4 +#define MAX_PART (1 << NWD_SHIFT) + +#define IO_OK 0 +#define IO_ERROR 1 + +#define MAJOR_NR COMPAQ_CISS_MAJOR + +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); + unsigned long (*intr_pending)(ctlr_info_t *h); + unsigned long (*command_completed)(ctlr_info_t *h); +}; +typedef struct _drive_info_struct +{ + __u32 LunID; + int usage_count; + sector_t nr_blocks; + int block_size; + int heads; + int sectors; + int cylinders; + int raid_level; +} 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; + unsigned long io_mem_addr; + unsigned long io_mem_length; + CfgTable_struct __iomem *cfgtable; + unsigned int intr; + 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 */ + + // information about each logical volume + drive_info_struct drv[CISS_MAX_LUN]; + + struct access_method access; + + /* queue and queue Info */ + CommandList_struct *reqQ; + CommandList_struct *cmpQ; + unsigned int Qdepth; + unsigned int maxQsinceinit; + unsigned int maxSG; + spinlock_t lock; + struct request_queue *queue; + + //* 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; + + /* 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[NWD]; +#ifdef CONFIG_CISS_SCSI_TAPE + void *scsi_ctlr; /* ptr to structure containing scsi related stuff */ +#endif +}; + +/* Defining the diffent access_menthods */ +/* + * 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 */ + +#define CISS_ERROR_BIT 0x02 + +#define CCISS_INTR_ON 1 +#define CCISS_INTR_OFF 0 +/* + Send the command to the hardware +*/ +static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c) +{ +#ifdef CCISS_DEBUG + printk("Sending %x - down to controller\n", c->busaddr ); +#endif /* CCISS_DEBUG */ + writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_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); + } else /* Turn them off */ + { + h->interrupts_enabled = 0; + writel( SA5_INTR_OFF, + 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); + } else /* Turn them off */ + { + h->interrupts_enabled = 0; + writel( SA5B_INTR_OFF, + 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); + +} +/* + * Returns true if an interrupt is pending.. + */ +static unsigned long 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 unsigned long 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 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, +}; + +struct board_type { + __u32 board_id; + char *product_name; + struct access_method *access; +}; + +#define CCISS_LOCK(i) (hba[i]->queue->queue_lock) + +#endif /* CCISS_H */ + |