aic7xxx.c

基于组件方式开发操作系统的OSKIT源代码

 * cause the driver to skip scanning for any VLB or EISA controllers and
 * only support the PCI controllers.  NOTE: this means that if the kernel
 * os compiled with PCI support disabled, then setting this to non-0
 * would result in never finding any devices :)
 */
static int aic7xxx_no_probe = 0;

/*
 * So that insmod can find the variable and make it point to something
 */
#ifdef MODULE
static char * aic7xxx = NULL;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,18)
MODULE_PARM(aic7xxx, "s");
#endif

/*
 * Just in case someone uses commas to separate items on the insmod
 * command line, we define a dummy buffer here to avoid having insmod
 * write wild stuff into our code segment
 */
static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";

#endif

#define VERBOSE_NORMAL         0x0000
#define VERBOSE_NEGOTIATION    0x0001
#define VERBOSE_SEQINT         0x0002
#define VERBOSE_SCSIINT        0x0004
#define VERBOSE_PROBE          0x0008
#define VERBOSE_PROBE2         0x0010
#define VERBOSE_NEGOTIATION2   0x0020
#define VERBOSE_MINOR_ERROR    0x0040
#define VERBOSE_TRACING        0x0080
#define VERBOSE_ABORT          0x0f00
#define VERBOSE_ABORT_MID      0x0100
#define VERBOSE_ABORT_FIND     0x0200
#define VERBOSE_ABORT_PROCESS  0x0400
#define VERBOSE_ABORT_RETURN   0x0800
#define VERBOSE_RESET          0xf000
#define VERBOSE_RESET_MID      0x1000
#define VERBOSE_RESET_FIND     0x2000
#define VERBOSE_RESET_PROCESS  0x4000
#define VERBOSE_RESET_RETURN   0x8000
static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION |
           VERBOSE_PROBE;                     /* verbose messages */


/****************************************************************************
 *
 * We're going to start putting in function declarations so that order of
 * functions is no longer important.  As needed, they are added here.
 *
 ***************************************************************************/

static void aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd);
static void aic7xxx_print_card(struct aic7xxx_host *p);
static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p);
static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded);
#ifdef AIC7XXX_VERBOSE_DEBUGGING
static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer);
#endif

/****************************************************************************
 *
 * These functions are now used.  They happen to be wrapped in useless
 * inb/outb port read/writes around the real reads and writes because it
 * seems that certain very fast CPUs have a problem dealing with us when
 * going at full speed.
 *
 ***************************************************************************/

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
static inline void
mdelay(int milliseconds)
{
  int i;

  for(i=0; i<milliseconds; i++)
    udelay(1000);
}

static inline int
time_after_eq(unsigned long a, unsigned long b)
{
  return((long)((a) - (b)) >= 0L);
}

static inline int
timer_pending(struct timer_list *timer)
{
  return( timer->prev != NULL );
}

#define PCI_DEVICE_ID_ADAPTEC_1480A 0x6075

#endif

static inline unsigned char
aic_inb(struct aic7xxx_host *p, long port)
{
#ifdef MMAPIO
  unsigned char x;
  if(p->maddr)
  {
    x = p->maddr[port];
  }
  else
  {
    x = inb(p->base + port);
  }
  mb();
  return(x);
#else
  return(inb(p->base + port));
#endif
}

static inline void
aic_outb(struct aic7xxx_host *p, unsigned char val, long port)
{
#ifdef MMAPIO
  if(p->maddr)
  {
    p->maddr[port] = val;
  }
  else
  {
    outb(val, p->base + port);
  }
  mb();
#else
  outb(val, p->base + port);
#endif
}

/*+F*************************************************************************
 * Function:
 *   aic7xxx_setup
 *
 * Description:
 *   Handle Linux boot parameters. This routine allows for assigning a value
 *   to a parameter with a ':' between the parameter and the value.
 *   ie. aic7xxx=unpause:0x0A,extended
 *-F*************************************************************************/
void
aic7xxx_setup(char *s, int *dummy)
{
  int   i, n;
  char *p;
  char *end;

  static struct {
    const char *name;
    unsigned int *flag;
  } options[] = {
    { "extended",    &aic7xxx_extended },
    { "no_reset",    &aic7xxx_no_reset },
    { "irq_trigger", &aic7xxx_irq_trigger },
    { "verbose",     &aic7xxx_verbose },
    { "reverse_scan",&aic7xxx_reverse_scan },
    { "override_term", &aic7xxx_override_term },
    { "stpwlev", &aic7xxx_stpwlev },
    { "no_probe", &aic7xxx_no_probe },
    { "panic_on_abort", &aic7xxx_panic_on_abort },
    { "pci_parity", &aic7xxx_pci_parity },
    { "dump_card", &aic7xxx_dump_card },
    { "dump_sequencer", &aic7xxx_dump_sequencer },
    { "tag_info",    NULL }
  };

  end = strchr(s, '\0');

  for (p = strtok(s, ",."); p; p = strtok(NULL, ",."))
  {
    for (i = 0; i < NUMBER(options); i++)
    {
      n = strlen(options[i].name);
      if (!strncmp(options[i].name, p, n))
      {
        if (!strncmp(p, "tag_info", n))
        {
          if (p[n] == ':')
          {
            char *base;
            char *tok, *tok_end, *tok_end2;
            char tok_list[] = { '.', ',', '{', '}', '\0' };
            int i, instance = -1, device = -1;
            unsigned char done = FALSE;

            base = p;
            tok = base + n + 1;  /* Forward us just past the ':' */
            tok_end = strchr(tok, '\0');
            if (tok_end < end)
              *tok_end = ',';
            while(!done)
            {
              switch(*tok)
              {
                case '{':
                  if (instance == -1)
                    instance = 0;
                  else if (device == -1)
                    device = 0;
                  tok++;
                  break;
                case '}':
                  if (device != -1)
                    device = -1;
                  else if (instance != -1)
                    instance = -1;
                  tok++;
                  break;
                case ',':
                case '.':
                  if (instance == -1)
                    done = TRUE;
                  else if (device >= 0)
                    device++;
                  else if (instance >= 0)
                    instance++;
                  if ( (device >= MAX_TARGETS) || 
                       (instance >= NUMBER(aic7xxx_tag_info)) )
                    done = TRUE;
                  tok++;
                  if (!done)
                  {
                    base = tok;
                  }
                  break;
                case '\0':
                  done = TRUE;
                  break;
                default:
                  done = TRUE;
                  tok_end = strchr(tok, '\0');
                  for(i=0; tok_list[i]; i++)
                  {
                    tok_end2 = strchr(tok, tok_list[i]);
                    if ( (tok_end2) && (tok_end2 < tok_end) )
                    {
                      tok_end = tok_end2;
                      done = FALSE;
                    }
                  }
                  if ( (instance >= 0) && (device >= 0) &&
                       (instance < NUMBER(aic7xxx_tag_info)) &&
                       (device < MAX_TARGETS) )
                    aic7xxx_tag_info[instance].tag_commands[device] =
                      simple_strtoul(tok, NULL, 0) & 0xff;
                  tok = tok_end;
                  break;
              }
            }
            while((p != base) && (p != NULL))
              p = strtok(NULL, ",.");
          }
        }
        else if (p[n] == ':')
        {
          *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
        }
        else if (!strncmp(p, "verbose", n))
        {
          *(options[i].flag) = 0xff09;
        }
        else
        {
          *(options[i].flag) = ~(*(options[i].flag));
        }
      }
    }
  }
}

/*+F*************************************************************************
 * Function:
 *   pause_sequencer
 *
 * Description:
 *   Pause the sequencer and wait for it to actually stop - this
 *   is important since the sequencer can disable pausing for critical
 *   sections.
 *-F*************************************************************************/
static inline void
pause_sequencer(struct aic7xxx_host *p)
{
  aic_outb(p, p->pause, HCNTRL);
  while ((aic_inb(p, HCNTRL) & PAUSE) == 0)
  {
    ;
  }
}

/*+F*************************************************************************
 * Function:
 *   unpause_sequencer
 *
 * Description:
 *   Unpause the sequencer. Unremarkable, yet done often enough to
 *   warrant an easy way to do it.
 *-F*************************************************************************/
static inline void
unpause_sequencer(struct aic7xxx_host *p, int unpause_always)
{
  if (unpause_always ||
      ( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) &&
        !(p->flags & AHC_HANDLING_REQINITS) ) )
  {
    aic_outb(p, p->unpause, HCNTRL);
  }
}

/*+F*************************************************************************
 * Function:
 *   restart_sequencer
 *
 * Description:
 *   Restart the sequencer program from address zero.  This assumes
 *   that the sequencer is already paused.
 *-F*************************************************************************/
static inline void
restart_sequencer(struct aic7xxx_host *p)
{
  aic_outb(p, 0, SEQADDR0);
  aic_outb(p, 0, SEQADDR1);
  aic_outb(p, FASTMODE, SEQCTL);
}

/*
 * We include the aic7xxx_seq.c file here so that the other defines have
 * already been made, and so that it comes before the code that actually
 * downloads the instructions (since we don't typically use function
 * prototype, our code has to be ordered that way, it's a left-over from
 * th