aic7xxx.c

基于组件方式开发操作系统的OSKIT源代码

         p->cpu_lock_count[cpuid]++; \
       } else { \
         p->cpu_lock_count[cpuid]++; \
       }
#    define DRIVER_UNLOCK \
       if(--p->cpu_lock_count[cpuid] == 0) \
         spin_unlock_irqrestore(&p->spin_lock, cpu_flags);
#  else
#    define DRIVER_LOCK_INIT
#    define DRIVER_LOCK
#    define DRIVER_UNLOCK
#  endif
#else
#  define cpuid 0
#  define DRIVER_LOCK_INIT
#  define DRIVER_LOCK \
       save_flags(cpu_flags); \
       cli();
#  define DRIVER_UNLOCK \
       restore_flags(cpu_flags);
#  define le32_to_cpu(x) (x)
#  define cpu_to_le32(x) (x)
#endif

/*
 * You can try raising me if tagged queueing is enabled, or lowering
 * me if you only have 4 SCBs.
 */
#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
#else
#define AIC7XXX_CMDS_PER_DEVICE 8
#endif

/* Set this to the delay in seconds after SCSI bus reset. */
#ifdef CONFIG_AIC7XXX_RESET_DELAY
#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY
#else
#define AIC7XXX_RESET_DELAY 5
#endif

/*
 * Control collection of SCSI transfer statistics for the /proc filesystem.
 *
 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
 * NOTE: This does affect performance since it has to maintain statistics.
 */
#ifdef CONFIG_AIC7XXX_PROC_STATS
#define AIC7XXX_PROC_STATS
#endif

/*
 * NOTE: Uncommenting the define below no longer has any effect, the
 *       tagged queue value array is always active now.  I've added
 *       a setup option to set this particular array and I'm hoping
 *       insmod will be smart enough to set it properly as well.  It's
 *       by use of this array that a person can enable tagged queueing.
 *       The DEFAULT_TAG_COMMANDS define has been changed to disable
 *       tagged queueing by default, so if your devices can handle tagged
 *       queueing you will need to add a line to their lilo.conf file like:
 *       append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
 *       which will result in the first four devices on the first two
 *       controllers being set to a tagged queue depth of 32.
 *
 * Set this for defining the number of tagged commands on a device
 * by device, and controller by controller basis.  The first set
 * of tagged commands will be used for the first detected aic7xxx
 * controller, the second set will be used for the second detected
 * aic7xxx controller, and so on.  These values will *only* be used
 * for targets that are tagged queueing capable; these values will
 * be ignored in all other cases.  The tag_commands is an array of
 * 16 to allow for wide and twin adapters.  Twin adapters will use
 * indexes 0-7 for channel 0, and indexes 8-15 for channel 1.
 *
 * *** Determining commands per LUN ***
 * 
 * When AIC7XXX_CMDS_PER_DEVICE is not defined, the driver will use its
 * own algorithm to determine the commands/LUN.  If SCB paging is
 * enabled, which is always now, the default is 8 commands per lun
 * that indicates it supports tagged queueing.  All non-tagged devices
 * use an internal queue depth of 3, with no more than one of those
 * three commands active at one time.
 */
/* #define AIC7XXX_TAGGED_QUEUEING_BY_DEVICE */

typedef struct
{
  unsigned char tag_commands[16];   /* Allow for wide/twin adapters. */
} adapter_tag_info_t;

/*
 * Make a define that will tell the driver not to use tagged queueing
 * by default.
 */
#ifdef CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT
#define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\
                              0, 0, 0, 0, 0, 0, 0, 0}
#else
#define DEFAULT_TAG_COMMANDS {255, 255, 255, 255, 255, 255, 255, 255,\
                              255, 255, 255, 255, 255, 255, 255, 255}
#endif

/*
 * Modify this as you see fit for your system.  By setting tag_commands
 * to 0, the driver will use it's own algorithm for determining the
 * number of commands to use (see above).  When 255, the driver will
 * not enable tagged queueing for that particular device.  When positive
 * (> 0) and (< 255) the values in the array are used for the queue_depth.
 * Note that the maximum value for an entry is 254, but you're insane if
 * you try to use that many commands on one device.
 *
 * In this example, the first line will disable tagged queueing for all
 * the devices on the first probed aic7xxx adapter.
 *
 * The second line enables tagged queueing with 4 commands/LUN for IDs
 * (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 * driver to use its own algorithm for ID 1.
 *
 * The third line is the same as the first line.
 *
 * The fourth line disables tagged queueing for devices 0 and 3.  It
 * enables tagged queueing for the other IDs, with 16 commands/LUN
 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 * IDs 2, 5-7, and 9-15.
 */

/*
 * NOTE: The below structure is for reference only, the actual structure
 *       to modify in order to change things is located around line
 *       number 1305
adapter_tag_info_t aic7xxx_tag_info[] =
{
  {DEFAULT_TAG_COMMANDS},
  {{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
  {DEFAULT_TAG_COMMANDS},
  {{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/

static adapter_tag_info_t aic7xxx_tag_info[] =
{
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS},
  {DEFAULT_TAG_COMMANDS}
};


/*
 * Define an array of board names that can be indexed by aha_type.
 * Don't forget to change this when changing the types!
 */
static const char *board_names[] = {
  "AIC-7xxx Unknown",                                   /* AIC_NONE */
  "Adaptec AIC-7810 Hardware RAID Controller",          /* AIC_7810 */
  "Adaptec AIC-7770 SCSI host adapter",                 /* AIC_7770 */
  "Adaptec AHA-274X SCSI host adapter",                 /* AIC_7771 */
  "Adaptec AHA-284X SCSI host adapter",                 /* AIC_284x */
  "Adaptec AIC-7850 SCSI host adapter",                 /* AIC_7850 */
  "Adaptec AIC-7855 SCSI host adapter",                 /* AIC_7855 */
  "Adaptec AIC-7860 Ultra SCSI host adapter",           /* AIC_7860 */
  "Adaptec AHA-2940A Ultra SCSI host adapter",          /* AIC_7861 */
  "Adaptec AIC-7870 SCSI host adapter",                 /* AIC_7870 */
  "Adaptec AHA-294X SCSI host adapter",                 /* AIC_7871 */
  "Adaptec AHA-394X SCSI host adapter",                 /* AIC_7872 */
  "Adaptec AHA-398X SCSI host adapter",                 /* AIC_7873 */
  "Adaptec AHA-2944 SCSI host adapter",                 /* AIC_7874 */
  "Adaptec AIC-7880 Ultra SCSI host adapter",           /* AIC_7880 */
  "Adaptec AHA-294X Ultra SCSI host adapter",           /* AIC_7881 */
  "Adaptec AHA-394X Ultra SCSI host adapter",           /* AIC_7882 */
  "Adaptec AHA-398X Ultra SCSI host adapter",           /* AIC_7883 */
  "Adaptec AHA-2944 Ultra SCSI host adapter",           /* AIC_7884 */
  "Adaptec AIC-7895 Ultra SCSI host adapter",           /* AIC_7895 */
  "Adaptec AIC-7890/1 Ultra2 SCSI host adapter",        /* AIC_7890 */
  "Adaptec AHA-293X Ultra2 SCSI host adapter",          /* AIC_7890 */
  "Adaptec AHA-294X Ultra2 SCSI host adapter",          /* AIC_7890 */
  "Adaptec AIC-7896/7 Ultra2 SCSI host adapter",        /* AIC_7896 */
  "Adaptec AHA-394X Ultra2 SCSI host adapter",          /* AIC_7897 */
  "Adaptec AHA-395X Ultra2 SCSI host adapter",          /* AIC_7897 */
  "Adaptec PCMCIA SCSI controller",                     /* card bus stuff */
  "Adaptec AIC-7892 Ultra 160/m SCSI host adapter",     /* AIC_7892 */
  "Adaptec AIC-7899 Ultra 160/m SCSI host adapter",     /* AIC_7899 */
};

/*
 * There should be a specific return value for this in scsi.h, but
 * it seems that most drivers ignore it.
 */
#define DID_UNDERFLOW   DID_ERROR

/*
 *  What we want to do is have the higher level scsi driver requeue
 *  the command to us. There is no specific driver status for this
 *  condition, but the higher level scsi driver will requeue the
 *  command on a DID_BUS_BUSY error.
 *
 *  Upon further inspection and testing, it seems that DID_BUS_BUSY
 *  will *always* retry the command.  We can get into an infinite loop
 *  if this happens when we really want some sort of counter that
 *  will automatically abort/reset the command after so many retries.
 *  Using DID_ERROR will do just that.  (Made by a suggestion by
 *  Doug Ledford 8/1/96)
 */
#define DID_RETRY_COMMAND DID_ERROR

#define HSCSIID        0x07
#define SCSI_RESET     0x040

/*
 * EISA/VL-bus stuff
 */
#define MINSLOT                1
#define MAXSLOT                15
#define SLOTBASE(x)        ((x) << 12)
#define BASE_TO_SLOT(x) ((x) >> 12)

/*
 * Standard EISA Host ID regs  (Offset from slot base)
 */
#define AHC_HID0              0x80   /* 0,1: msb of ID2, 2-7: ID1      */
#define AHC_HID1              0x81   /* 0-4: ID3, 5-7: LSB ID2         */
#define AHC_HID2              0x82   /* product                        */
#define AHC_HID3              0x83   /* firmware revision              */

/*
 * AIC-7770 I/O range to reserve for a card
 */
#define MINREG                0xC00
#define MAXREG                0xCBF

#define INTDEF                0x5C      /* Interrupt Definition Register */

/*
 * AIC-78X0 PCI registers
 */
#define        CLASS_PROGIF_REVID        0x08
#define                DEVREVID        0x000000FFul
#define                PROGINFC        0x0000FF00ul
#define                SUBCLASS        0x00FF0000ul
#define                BASECLASS        0xFF000000ul

#define        CSIZE_LATTIME                0x0C
#define                CACHESIZE        0x0000003Ful        /* only 5 bits */
#define                LATTIME                0x0000FF00ul

#define        DEVCONFIG                0x40
#define                SCBSIZE32        0x00010000ul        /* aic789X only */
#define                MPORTMODE        0x00000400ul        /* aic7870 only */
#define                RAMPSM           0x00000200ul        /* aic7870 only */
#define                RAMPSM_ULTRA2    0x00000004
#define                VOLSENSE         0x00000100ul
#define                SCBRAMSEL        0x00000080ul
#define                SCBRAMSEL_ULTRA2 0x00000008
#define                MRDCEN           0x00000040ul
#define                EXTSCBTIME       0x00000020ul        /* aic7870 only */
#define                EXTSCBPEN        0x00000010ul        /* aic7870 only */
#define                BERREN           0x00000008ul
#define                DACEN            0x00000004ul
#define                STPWLEVEL        0x00000002ul
#define                DIFACTNEGEN      0x00000001ul        /* aic7870 only */

#define        SCAMCTL                  0x1a                /* Ultra2 only  */
#define        CCSCBBADDR               0xf0                /* aic7895/6/7  */

/*
 * Define the different types of SEEPROMs on aic7xxx adapters
 * and make it also represent the address size used in accessing
 * its registers.  The 93C46 chips have 1024 bits organized into
 * 64 16-bit words, while the 93C56 chips have 2048 bits organized
 * into 128 16-bit words.  The C46 chips use 6 bits to address
 * each word, while the C56 and C66 (4096 bits) use 8 bits to
 * address each word.
 */
typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type;

/*
 *
 * Define the format of the SEEPROM registers (16 bits).
 *
 */
struct seeprom_config {

/*
 * SCSI ID Configuration Flags
 */
#define CFXFER                0x0007      /* synchronous transfer rate */
#define CFSYNCH               0x0008      /* enable synchronous transfer */
#define CFDISC                0x0010      /* enable disconnection */
#define CFWIDEB               0x0020      /* wide bus device (wide card) */
#define CFSYNCHISULTRA        0x0040      /* CFSYNC is an ultra offset */
#define CFNEWULTRAFORMAT      0x0080      /* Use the Ultra2 SEEPROM format */
#define CFSTART               0x0100      /* send start unit SCSI command */
#define CFINCBIOS             0x0200      /* include in BIOS scan */
#define CFRNFOUND             0x0400      /* report even if not found */
#define CFMULTILUN            0x0800      /* probe mult luns in BIOS scan */
#define CFWBCACHEYES          0x4000      /* Enable W-Behind Cache on drive */
#define CFWBCACHENC           0xc000      /* Don't change W-Behind Cache */
/* UNUSED                0x3000 */
  unsigned short device_flags[16];        /* words 0-15 */

/*
 * BIOS Control Bits
 */
#define CFSUPREM        0x0001  /* support all removable drives */
#define CFSUPREMB       0x0002  /* support removable drives for boot only */
#define CFBIOSEN        0x0004  /* BIOS enabled */
/* UNUSED                0x0008 */
#define CFSM2DRV        0x0010  /* support more than two drives */
#define CF284XEXTEND    0x0020  /* extended translation (284x cards) */
/* UNUSED                0x0040 */
#define CFEXTEND        0x0080  /* extended translation enabled */
/* UNUSED                0xFF00 */
  unsigned short bios_control;  /* word 16 */

/*
 * Host Adapter Control Bits
 */
#define CFAUTOTERM      0x0001  /* Perform Auto termination */
#define CFULTRAEN       0x0002  /* Ultra SCSI speed enable (Ultra cards) */
#define CF284XSELTO     0x0003  /* Selection timeout (284x cards) */
#define CF284XFIFO      0x000C  /* FIFO Threshold (284x cards) */
#define CFSTERM         0x0004  /* SCSI low byte termination */
#define CFWSTERM        0x0008  /* SCSI high byte termination (wide card) */
#define CFSPARITY       0x0010  /* SCSI parity */
#define CF284XSTERM     0x0020  /* SCSI low byte termination (284x cards) */