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
  15 #define VENDOR_LEN      8
  16 #define MODEL_LEN       16
  17 #define REV_LEN         4
  18
  19 struct ctlr_info;
  20 typedef struct ctlr_info ctlr_info_t;
  21
  22 struct access_method {
  23         void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
  24         void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
  25         unsigned long (*fifo_full)(ctlr_info_t *h);
  26         unsigned long (*intr_pending)(ctlr_info_t *h);
  27         unsigned long (*command_completed)(ctlr_info_t *h);
  28 };
  29 typedef struct _drive_info_struct
  30 {
  31         __u32   LunID;
  32         int     usage_count;
  33         struct request_queue *queue;
  34         sector_t nr_blocks;
  35         int     block_size;
  36         int     heads;
  37         int     sectors;
  38         int     cylinders;
  39         int     raid_level; /* set to -1 to indicate that
  40                              * the drive is not in use/configured
  41                              */
  42         int     busy_configuring; /* This is set when a drive is being removed
  43                                    * to prevent it from being opened or it's
  44                                    * queue from being started.
  45                                    */
  46         struct  device dev;
  47         __u8 serial_no[16]; /* from inquiry page 0x83,
  48                              * not necc. null terminated.
  49                              */
  50         char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
  51         char model[MODEL_LEN + 1];   /* SCSI model string */
  52         char rev[REV_LEN + 1];       /* SCSI revision string */
  53 } drive_info_struct;
  54
  55 #ifdef CONFIG_CISS_SCSI_TAPE
  56
  57 struct sendcmd_reject_list {
  58         int ncompletions;
  59         unsigned long *complete; /* array of NR_CMDS tags */
  60 };
  61
  62 #endif
  63 struct ctlr_info
  64 {
  65         int     ctlr;
  66         char    devname[8];
  67         char    *product_name;
  68         char    firm_ver[4]; // Firmware version
  69         struct pci_dev *pdev;
  70         __u32   board_id;
  71         void __iomem *vaddr;
  72         unsigned long paddr;
  73         int     nr_cmds; /* Number of commands allowed on this controller */
  74         CfgTable_struct __iomem *cfgtable;
  75         int     interrupts_enabled;
  76         int     major;
  77         int     max_commands;
  78         int     commands_outstanding;
  79         int     max_outstanding; /* Debug */
  80         int     num_luns;
  81         int     highest_lun;
  82         int     usage_count;  /* number of opens all all minor devices */
  83 #       define DOORBELL_INT     0
  84 #       define PERF_MODE_INT    1
  85 #       define SIMPLE_MODE_INT  2
  86 #       define MEMQ_MODE_INT    3
  87         unsigned int intr[4];
  88         unsigned int msix_vector;
  89         unsigned int msi_vector;
  90         int     cciss_max_sectors;
  91         BYTE    cciss_read;
  92         BYTE    cciss_write;
  93         BYTE    cciss_read_capacity;
  94
  95         // information about each logical volume
  96         drive_info_struct drv[CISS_MAX_LUN];
  97
  98         struct access_method access;
  99
 100         /* queue and queue Info */
 101         struct hlist_head reqQ;
 102         struct hlist_head cmpQ;
 103         unsigned int Qdepth;
 104         unsigned int maxQsinceinit;
 105         unsigned int maxSG;
 106         spinlock_t lock;
 107
 108         //* pointers to command and error info pool */
 109         CommandList_struct      *cmd_pool;
 110         dma_addr_t              cmd_pool_dhandle;
 111         ErrorInfo_struct        *errinfo_pool;
 112         dma_addr_t              errinfo_pool_dhandle;
 113         unsigned long           *cmd_pool_bits;
 114         int                     nr_allocs;
 115         int                     nr_frees;
 116         int                     busy_configuring;
 117         int                     busy_initializing;
 118
 119         /* This element holds the zero based queue number of the last
 120          * queue to be started.  It is used for fairness.
 121         */
 122         int                     next_to_run;
 123
 124         // Disk structures we need to pass back
 125         struct gendisk   *gendisk[CISS_MAX_LUN];
 126 #ifdef CONFIG_CISS_SCSI_TAPE
 127         void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
 128         /* list of block side commands the scsi error handling sucked up */
 129         /* and saved for later processing */
 130         struct sendcmd_reject_list scsi_rejects;
 131 #endif
 132         unsigned char alive;
 133         struct completion *rescan_wait;
 134         struct task_struct *cciss_scan_thread;
 135         struct device dev;
 136 };
 137
 138 /*  Defining the diffent access_menthods */
 139 /*
 140  * Memory mapped FIFO interface (SMART 53xx cards)
 141  */
 142 #define SA5_DOORBELL    0x20
 143 #define SA5_REQUEST_PORT_OFFSET 0x40
 144 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 145 #define SA5_REPLY_PORT_OFFSET           0x44
 146 #define SA5_INTR_STATUS         0x30
 147 #define SA5_SCRATCHPAD_OFFSET   0xB0
 148
 149 #define SA5_CTCFG_OFFSET        0xB4
 150 #define SA5_CTMEM_OFFSET        0xB8
 151
 152 #define SA5_INTR_OFF            0x08
 153 #define SA5B_INTR_OFF           0x04
 154 #define SA5_INTR_PENDING        0x08
 155 #define SA5B_INTR_PENDING       0x04
 156 #define FIFO_EMPTY              0xffffffff
 157 #define CCISS_FIRMWARE_READY    0xffff0000 /* value in scratchpad register */
 158
 159 #define  CISS_ERROR_BIT         0x02
 160
 161 #define CCISS_INTR_ON   1
 162 #define CCISS_INTR_OFF  0
 163 /*
 164         Send the command to the hardware
 165 */
 166 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
 167 {
 168 #ifdef CCISS_DEBUG
 169          printk("Sending %x - down to controller\n", c->busaddr );
 170 #endif /* CCISS_DEBUG */
 171          writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 172          h->commands_outstanding++;
 173          if ( h->commands_outstanding > h->max_outstanding)
 174                 h->max_outstanding = h->commands_outstanding;
 175 }
 176
 177 /*
 178  *  This card is the opposite of the other cards.
 179  *   0 turns interrupts on...
 180  *   0x08 turns them off...
 181  */
 182 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
 183 {
 184         if (val)
 185         { /* Turn interrupts on */
 186                 h->interrupts_enabled = 1;
 187                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 188         } else /* Turn them off */
 189         {
 190                 h->interrupts_enabled = 0;
 191                 writel( SA5_INTR_OFF,
 192                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 193         }
 194 }
 195 /*
 196  *  This card is the opposite of the other cards.
 197  *   0 turns interrupts on...
 198  *   0x04 turns them off...
 199  */
 200 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
 201 {
 202         if (val)
 203         { /* Turn interrupts on */
 204                 h->interrupts_enabled = 1;
 205                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 206         } else /* Turn them off */
 207         {
 208                 h->interrupts_enabled = 0;
 209                 writel( SA5B_INTR_OFF,
 210                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 211         }
 212 }
 213 /*
 214  *  Returns true if fifo is full.
 215  *
 216  */
 217 static unsigned long SA5_fifo_full(ctlr_info_t *h)
 218 {
 219         if( h->commands_outstanding >= h->max_commands)
 220                 return(1);
 221         else
 222                 return(0);
 223
 224 }
 225 /*
 226  *   returns value read from hardware.
 227  *     returns FIFO_EMPTY if there is nothing to read
 228  */
 229 static unsigned long SA5_completed(ctlr_info_t *h)
 230 {
 231         unsigned long register_value
 232                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 233         if(register_value != FIFO_EMPTY)
 234         {
 235                 h->commands_outstanding--;
 236 #ifdef CCISS_DEBUG
 237                 printk("cciss:  Read %lx back from board\n", register_value);
 238 #endif /* CCISS_DEBUG */
 239         }
 240 #ifdef CCISS_DEBUG
 241         else
 242         {
 243                 printk("cciss:  FIFO Empty read\n");
 244         }
 245 #endif
 246         return ( register_value);
 247
 248 }
 249 /*
 250  *      Returns true if an interrupt is pending..
 251  */
 252 static unsigned long SA5_intr_pending(ctlr_info_t *h)
 253 {
 254         unsigned long register_value  =
 255                 readl(h->vaddr + SA5_INTR_STATUS);
 256 #ifdef CCISS_DEBUG
 257         printk("cciss: intr_pending %lx\n", register_value);
 258 #endif  /* CCISS_DEBUG */
 259         if( register_value &  SA5_INTR_PENDING)
 260                 return  1;
 261         return 0 ;
 262 }
 263
 264 /*
 265  *      Returns true if an interrupt is pending..
 266  */
 267 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
 268 {
 269         unsigned long register_value  =
 270                 readl(h->vaddr + SA5_INTR_STATUS);
 271 #ifdef CCISS_DEBUG
 272         printk("cciss: intr_pending %lx\n", register_value);
 273 #endif  /* CCISS_DEBUG */
 274         if( register_value &  SA5B_INTR_PENDING)
 275                 return  1;
 276         return 0 ;
 277 }
 278
 279
 280 static struct access_method SA5_access = {
 281         SA5_submit_command,
 282         SA5_intr_mask,
 283         SA5_fifo_full,
 284         SA5_intr_pending,
 285         SA5_completed,
 286 };
 287
 288 static struct access_method SA5B_access = {
 289         SA5_submit_command,
 290         SA5B_intr_mask,
 291         SA5_fifo_full,
 292         SA5B_intr_pending,
 293         SA5_completed,
 294 };
 295
 296 struct board_type {
 297         __u32   board_id;
 298         char    *product_name;
 299         struct access_method *access;
 300         int nr_cmds; /* Max cmds this kind of ctlr can handle. */
 301 };
 302
 303 #define CCISS_LOCK(i)   (&hba[i]->lock)
 304
 305 #endif /* CCISS_H */
 306