cciss.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- #ifndef CCISS_H
- #define CCISS_H
- #include <linux/genhd.h>
- #include "cciss_cmd.h"
- #define NWD 16
- #define NWD_SHIFT 4
- #define MAX_PART 16
- #define IO_OK 0
- #define IO_ERROR 1
- #define MAJOR_NR COMPAQ_CISS_MAJOR
- struct my_sg {
- int len;
- char *start_addr;
- };
- 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;
- int nr_blocks;
- int block_size;
- int heads;
- int sectors;
- int cylinders;
- } 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;
- ulong vaddr;
- __u32 paddr;
- CfgTable_struct *cfgtable;
- int intr;
- int max_commands;
- int commands_outstanding;
- int max_outstanding; /* Debug */
- int num_luns;
- 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;
- //* 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;
- __u32 *cmd_pool_bits;
- int nr_allocs;
- int nr_frees;
- // Disk structures we need to pass back
- struct gendisk gendisk;
- // indexed by minor numbers
- struct hd_struct hd[256];
- int sizes[256];
- int blocksizes[256];
- int hardsizes[256];
- };
- /* 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_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 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 controllern", 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 */
- writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
- } else /* Turn them off */
- {
- 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 */
- writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
- } else /* Turn them off */
- {
- 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 boardn", register_value);
- #endif /* CCISS_DEBUG */
- }
- #ifdef CCISS_DEBUG
- else
- {
- printk("cciss: FIFO Empty readn");
- }
- #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 %lxn", 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 %lxn", 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;
- };
- #endif /* CCISS_H */