drivers/block/cciss.h

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