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 struct ctlr_info;
  17 typedef struct ctlr_info ctlr_info_t;
  18
  19 struct access_method {
  20         void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
  21         void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
  22         unsigned long (*fifo_full)(ctlr_info_t *h);
  23         unsigned long (*intr_pending)(ctlr_info_t *h);
  24         unsigned long (*command_completed)(ctlr_info_t *h);
  25 };
  26 typedef struct _drive_info_struct
  27 {
  28         __u32   LunID;
  29         int     usage_count;
  30         struct request_queue *queue;
  31         sector_t nr_blocks;
  32         int     block_size;
  33         int     heads;
  34         int     sectors;
  35         int     cylinders;
  36         int     raid_level; /* set to -1 to indicate that
  37                              * the drive is not in use/configured
  38                             */
  39         int     busy_configuring; /*This is set when the drive is being removed
  40                                    *to prevent it from being opened or it's queue
  41                                    *from being started.
  42                                   */
  43 } drive_info_struct;
  44
  45 #ifdef CONFIG_CISS_SCSI_TAPE
  46
  47 struct sendcmd_reject_list {
  48         int ncompletions;
  49         unsigned long *complete; /* array of NR_CMDS tags */
  50 };
  51
  52 #endif
  53 struct ctlr_info
  54 {
  55         int     ctlr;
  56         char    devname[8];
  57         char    *product_name;
  58         char    firm_ver[4]; // Firmware version
  59         struct pci_dev *pdev;
  60         __u32   board_id;
  61         void __iomem *vaddr;
  62         unsigned long paddr;
  63         CfgTable_struct __iomem *cfgtable;
  64         int     interrupts_enabled;
  65         int     major;
  66         int     max_commands;
  67         int     commands_outstanding;
  68         int     max_outstanding; /* Debug */
  69         int     num_luns;
  70         int     highest_lun;
  71         int     usage_count;  /* number of opens all all minor devices */
  72 #       define DOORBELL_INT     0
  73 #       define PERF_MODE_INT    1
  74 #       define SIMPLE_MODE_INT  2
  75 #       define MEMQ_MODE_INT    3
  76         unsigned int intr[4];
  77         unsigned int msix_vector;
  78         unsigned int msi_vector;
  79
  80         // information about each logical volume
  81         drive_info_struct drv[CISS_MAX_LUN];
  82
  83         struct access_method access;
  84
  85         /* queue and queue Info */
  86         CommandList_struct *reqQ;
  87         CommandList_struct  *cmpQ;
  88         unsigned int Qdepth;
  89         unsigned int maxQsinceinit;
  90         unsigned int maxSG;
  91         spinlock_t lock;
  92
  93         //* pointers to command and error info pool */
  94         CommandList_struct      *cmd_pool;
  95         dma_addr_t              cmd_pool_dhandle;
  96         ErrorInfo_struct        *errinfo_pool;
  97         dma_addr_t              errinfo_pool_dhandle;
  98         unsigned long           *cmd_pool_bits;
  99         int                     nr_allocs;
 100         int                     nr_frees;
 101         int                     busy_configuring;
 102         int                     busy_initializing;
 103
 104         /* This element holds the zero based queue number of the last
 105          * queue to be started.  It is used for fairness.
 106         */
 107         int                     next_to_run;
 108
 109         // Disk structures we need to pass back
 110         struct gendisk   *gendisk[NWD];
 111 #ifdef CONFIG_CISS_SCSI_TAPE
 112         void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
 113         /* list of block side commands the scsi error handling sucked up */
 114         /* and saved for later processing */
 115         struct sendcmd_reject_list scsi_rejects;
 116 #endif
 117         unsigned char alive;
 118 };
 119
 120 /*  Defining the diffent access_menthods */
 121 /*
 122  * Memory mapped FIFO interface (SMART 53xx cards)
 123  */
 124 #define SA5_DOORBELL    0x20
 125 #define SA5_REQUEST_PORT_OFFSET 0x40
 126 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 127 #define SA5_REPLY_PORT_OFFSET           0x44
 128 #define SA5_INTR_STATUS         0x30
 129 #define SA5_SCRATCHPAD_OFFSET   0xB0
 130
 131 #define SA5_CTCFG_OFFSET        0xB4
 132 #define SA5_CTMEM_OFFSET        0xB8
 133
 134 #define SA5_INTR_OFF            0x08
 135 #define SA5B_INTR_OFF           0x04
 136 #define SA5_INTR_PENDING        0x08
 137 #define SA5B_INTR_PENDING       0x04
 138 #define FIFO_EMPTY              0xffffffff
 139 #define CCISS_FIRMWARE_READY    0xffff0000 /* value in scratchpad register */
 140
 141 #define  CISS_ERROR_BIT         0x02
 142
 143 #define CCISS_INTR_ON   1
 144 #define CCISS_INTR_OFF  0
 145 /*
 146         Send the command to the hardware
 147 */
 148 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
 149 {
 150 #ifdef CCISS_DEBUG
 151          printk("Sending %x - down to controller\n", c->busaddr );
 152 #endif /* CCISS_DEBUG */
 153          writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 154          h->commands_outstanding++;
 155          if ( h->commands_outstanding > h->max_outstanding)
 156                 h->max_outstanding = h->commands_outstanding;
 157 }
 158
 159 /*
 160  *  This card is the opposite of the other cards.
 161  *   0 turns interrupts on...
 162  *   0x08 turns them off...
 163  */
 164 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
 165 {
 166         if (val)
 167         { /* Turn interrupts on */
 168                 h->interrupts_enabled = 1;
 169                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 170         } else /* Turn them off */
 171         {
 172                 h->interrupts_enabled = 0;
 173                 writel( SA5_INTR_OFF,
 174                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 175         }
 176 }
 177 /*
 178  *  This card is the opposite of the other cards.
 179  *   0 turns interrupts on...
 180  *   0x04 turns them off...
 181  */
 182 static void SA5B_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( SA5B_INTR_OFF,
 192                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 193         }
 194 }
 195 /*
 196  *  Returns true if fifo is full.
 197  *
 198  */
 199 static unsigned long SA5_fifo_full(ctlr_info_t *h)
 200 {
 201         if( h->commands_outstanding >= h->max_commands)
 202                 return(1);
 203         else
 204                 return(0);
 205
 206 }
 207 /*
 208  *   returns value read from hardware.
 209  *     returns FIFO_EMPTY if there is nothing to read
 210  */
 211 static unsigned long SA5_completed(ctlr_info_t *h)
 212 {
 213         unsigned long register_value
 214                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 215         if(register_value != FIFO_EMPTY)
 216         {
 217                 h->commands_outstanding--;
 218 #ifdef CCISS_DEBUG
 219                 printk("cciss:  Read %lx back from board\n", register_value);
 220 #endif /* CCISS_DEBUG */
 221         }
 222 #ifdef CCISS_DEBUG
 223         else
 224         {
 225                 printk("cciss:  FIFO Empty read\n");
 226         }
 227 #endif
 228         return ( register_value);
 229
 230 }
 231 /*
 232  *      Returns true if an interrupt is pending..
 233  */
 234 static unsigned long SA5_intr_pending(ctlr_info_t *h)
 235 {
 236         unsigned long register_value  =
 237                 readl(h->vaddr + SA5_INTR_STATUS);
 238 #ifdef CCISS_DEBUG
 239         printk("cciss: intr_pending %lx\n", register_value);
 240 #endif  /* CCISS_DEBUG */
 241         if( register_value &  SA5_INTR_PENDING)
 242                 return  1;
 243         return 0 ;
 244 }
 245
 246 /*
 247  *      Returns true if an interrupt is pending..
 248  */
 249 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
 250 {
 251         unsigned long register_value  =
 252                 readl(h->vaddr + SA5_INTR_STATUS);
 253 #ifdef CCISS_DEBUG
 254         printk("cciss: intr_pending %lx\n", register_value);
 255 #endif  /* CCISS_DEBUG */
 256         if( register_value &  SA5B_INTR_PENDING)
 257                 return  1;
 258         return 0 ;
 259 }
 260
 261
 262 static struct access_method SA5_access = {
 263         SA5_submit_command,
 264         SA5_intr_mask,
 265         SA5_fifo_full,
 266         SA5_intr_pending,
 267         SA5_completed,
 268 };
 269
 270 static struct access_method SA5B_access = {
 271         SA5_submit_command,
 272         SA5B_intr_mask,
 273         SA5_fifo_full,
 274         SA5B_intr_pending,
 275         SA5_completed,
 276 };
 277
 278 struct board_type {
 279         __u32   board_id;
 280         char    *product_name;
 281         struct access_method *access;
 282 };
 283
 284 #define CCISS_LOCK(i)   (&hba[i]->lock)
 285
 286 #endif /* CCISS_H */
 287