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