drivers/block/cciss.h

   1 #ifndef CCISS_H
   2 #define CCISS_H
   3
   4 #include <linux/genhd.h>
   5 #include <linux/mutex.h>
   6
   7 #include "cciss_cmd.h"
   8
   9
  10 #define NWD_SHIFT       4
  11 #define MAX_PART        (1 << NWD_SHIFT)
  12
  13 #define IO_OK           0
  14 #define IO_ERROR        1
  15 #define IO_NEEDS_RETRY  3
  16
  17 #define VENDOR_LEN      8
  18 #define MODEL_LEN       16
  19 #define REV_LEN         4
  20
  21 struct ctlr_info;
  22 typedef struct ctlr_info ctlr_info_t;
  23
  24 struct access_method {
  25         void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
  26         void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
  27         unsigned long (*fifo_full)(ctlr_info_t *h);
  28         unsigned long (*intr_pending)(ctlr_info_t *h);
  29         unsigned long (*command_completed)(ctlr_info_t *h);
  30 };
  31 typedef struct _drive_info_struct
  32 {
  33         unsigned char LunID[8];
  34         int     usage_count;
  35         struct request_queue *queue;
  36         sector_t nr_blocks;
  37         int     block_size;
  38         int     heads;
  39         int     sectors;
  40         int     cylinders;
  41         int     raid_level; /* set to -1 to indicate that
  42                              * the drive is not in use/configured
  43                              */
  44         int     busy_configuring; /* This is set when a drive is being removed
  45                                    * to prevent it from being opened or it's
  46                                    * queue from being started.
  47                                    */
  48         struct  device dev;
  49         __u8 serial_no[16]; /* from inquiry page 0x83,
  50                              * not necc. null terminated.
  51                              */
  52         char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
  53         char model[MODEL_LEN + 1];   /* SCSI model string */
  54         char rev[REV_LEN + 1];       /* SCSI revision string */
  55         char device_initialized;     /* indicates whether dev is initialized */
  56 } drive_info_struct;
  57
  58 struct ctlr_info
  59 {
  60         int     ctlr;
  61         char    devname[8];
  62         char    *product_name;
  63         char    firm_ver[4]; // Firmware version
  64         struct pci_dev *pdev;
  65         __u32   board_id;
  66         void __iomem *vaddr;
  67         unsigned long paddr;
  68         int     nr_cmds; /* Number of commands allowed on this controller */
  69         CfgTable_struct __iomem *cfgtable;
  70         int     interrupts_enabled;
  71         int     major;
  72         int     max_commands;
  73         int     commands_outstanding;
  74         int     max_outstanding; /* Debug */
  75         int     num_luns;
  76         int     highest_lun;
  77         int     usage_count;  /* number of opens all all minor devices */
  78 #       define DOORBELL_INT     0
  79 #       define PERF_MODE_INT    1
  80 #       define SIMPLE_MODE_INT  2
  81 #       define MEMQ_MODE_INT    3
  82         unsigned int intr[4];
  83         unsigned int msix_vector;
  84         unsigned int msi_vector;
  85         int     cciss_max_sectors;
  86         BYTE    cciss_read;
  87         BYTE    cciss_write;
  88         BYTE    cciss_read_capacity;
  89
  90         // information about each logical volume
  91         drive_info_struct *drv[CISS_MAX_LUN];
  92
  93         struct access_method access;
  94
  95         /* queue and queue Info */
  96         struct hlist_head reqQ;
  97         struct hlist_head cmpQ;
  98         unsigned int Qdepth;
  99         unsigned int maxQsinceinit;
 100         unsigned int maxSG;
 101         spinlock_t lock;
 102
 103         //* pointers to command and error info pool */
 104         CommandList_struct      *cmd_pool;
 105         dma_addr_t              cmd_pool_dhandle;
 106         ErrorInfo_struct        *errinfo_pool;
 107         dma_addr_t              errinfo_pool_dhandle;
 108         unsigned long           *cmd_pool_bits;
 109         int                     nr_allocs;
 110         int                     nr_frees;
 111         int                     busy_configuring;
 112         int                     busy_initializing;
 113         int                     busy_scanning;
 114         struct mutex            busy_shutting_down;
 115
 116         /* This element holds the zero based queue number of the last
 117          * queue to be started.  It is used for fairness.
 118         */
 119         int                     next_to_run;
 120
 121         // Disk structures we need to pass back
 122         struct gendisk   *gendisk[CISS_MAX_LUN];
 123 #ifdef CONFIG_CISS_SCSI_TAPE
 124         void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
 125         /* list of block side commands the scsi error handling sucked up */
 126         /* and saved for later processing */
 127 #endif
 128         unsigned char alive;
 129         struct list_head scan_list;
 130         struct completion scan_wait;
 131         struct device dev;
 132 };
 133
 134 /*  Defining the diffent access_menthods */
 135 /*
 136  * Memory mapped FIFO interface (SMART 53xx cards)
 137  */
 138 #define SA5_DOORBELL    0x20
 139 #define SA5_REQUEST_PORT_OFFSET 0x40
 140 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 141 #define SA5_REPLY_PORT_OFFSET           0x44
 142 #define SA5_INTR_STATUS         0x30
 143 #define SA5_SCRATCHPAD_OFFSET   0xB0
 144
 145 #define SA5_CTCFG_OFFSET        0xB4
 146 #define SA5_CTMEM_OFFSET        0xB8
 147
 148 #define SA5_INTR_OFF            0x08
 149 #define SA5B_INTR_OFF           0x04
 150 #define SA5_INTR_PENDING        0x08
 151 #define SA5B_INTR_PENDING       0x04
 152 #define FIFO_EMPTY              0xffffffff
 153 #define CCISS_FIRMWARE_READY    0xffff0000 /* value in scratchpad register */
 154
 155 #define  CISS_ERROR_BIT         0x02
 156
 157 #define CCISS_INTR_ON   1
 158 #define CCISS_INTR_OFF  0
 159 /*
 160         Send the command to the hardware
 161 */
 162 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
 163 {
 164 #ifdef CCISS_DEBUG
 165          printk("Sending %x - down to controller\n", c->busaddr );
 166 #endif /* CCISS_DEBUG */
 167          writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 168          h->commands_outstanding++;
 169          if ( h->commands_outstanding > h->max_outstanding)
 170                 h->max_outstanding = h->commands_outstanding;
 171 }
 172
 173 /*
 174  *  This card is the opposite of the other cards.
 175  *   0 turns interrupts on...
 176  *   0x08 turns them off...
 177  */
 178 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
 179 {
 180         if (val)
 181         { /* Turn interrupts on */
 182                 h->interrupts_enabled = 1;
 183                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 184         } else /* Turn them off */
 185         {
 186                 h->interrupts_enabled = 0;
 187                 writel( SA5_INTR_OFF,
 188                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 189         }
 190 }
 191 /*
 192  *  This card is the opposite of the other cards.
 193  *   0 turns interrupts on...
 194  *   0x04 turns them off...
 195  */
 196 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
 197 {
 198         if (val)
 199         { /* Turn interrupts on */
 200                 h->interrupts_enabled = 1;
 201                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 202         } else /* Turn them off */
 203         {
 204                 h->interrupts_enabled = 0;
 205                 writel( SA5B_INTR_OFF,
 206                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 207         }
 208 }
 209 /*
 210  *  Returns true if fifo is full.
 211  *
 212  */
 213 static unsigned long SA5_fifo_full(ctlr_info_t *h)
 214 {
 215         if( h->commands_outstanding >= h->max_commands)
 216                 return(1);
 217         else
 218                 return(0);
 219
 220 }
 221 /*
 222  *   returns value read from hardware.
 223  *     returns FIFO_EMPTY if there is nothing to read
 224  */
 225 static unsigned long SA5_completed(ctlr_info_t *h)
 226 {
 227         unsigned long register_value
 228                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 229         if(register_value != FIFO_EMPTY)
 230         {
 231                 h->commands_outstanding--;
 232 #ifdef CCISS_DEBUG
 233                 printk("cciss:  Read %lx back from board\n", register_value);
 234 #endif /* CCISS_DEBUG */
 235         }
 236 #ifdef CCISS_DEBUG
 237         else
 238         {
 239                 printk("cciss:  FIFO Empty read\n");
 240         }
 241 #endif
 242         return ( register_value);
 243
 244 }
 245 /*
 246  *      Returns true if an interrupt is pending..
 247  */
 248 static unsigned long SA5_intr_pending(ctlr_info_t *h)
 249 {
 250         unsigned long register_value  =
 251                 readl(h->vaddr + SA5_INTR_STATUS);
 252 #ifdef CCISS_DEBUG
 253         printk("cciss: intr_pending %lx\n", register_value);
 254 #endif  /* CCISS_DEBUG */
 255         if( register_value &  SA5_INTR_PENDING)
 256                 return  1;
 257         return 0 ;
 258 }
 259
 260 /*
 261  *      Returns true if an interrupt is pending..
 262  */
 263 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
 264 {
 265         unsigned long register_value  =
 266                 readl(h->vaddr + SA5_INTR_STATUS);
 267 #ifdef CCISS_DEBUG
 268         printk("cciss: intr_pending %lx\n", register_value);
 269 #endif  /* CCISS_DEBUG */
 270         if( register_value &  SA5B_INTR_PENDING)
 271                 return  1;
 272         return 0 ;
 273 }
 274
 275
 276 static struct access_method SA5_access = {
 277         SA5_submit_command,
 278         SA5_intr_mask,
 279         SA5_fifo_full,
 280         SA5_intr_pending,
 281         SA5_completed,
 282 };
 283
 284 static struct access_method SA5B_access = {
 285         SA5_submit_command,
 286         SA5B_intr_mask,
 287         SA5_fifo_full,
 288         SA5B_intr_pending,
 289         SA5_completed,
 290 };
 291
 292 struct board_type {
 293         __u32   board_id;
 294         char    *product_name;
 295         struct access_method *access;
 296         int nr_cmds; /* Max cmds this kind of ctlr can handle. */
 297 };
 298
 299 #define CCISS_LOCK(i)   (&hba[i]->lock)
 300
 301 #endif /* CCISS_H */
 302