patch-2.1.71 linux/drivers/scsi/aic7xxx.c

• Lines: 307
• Date: Tue Dec 2 20:41:21 1997
• Orig file: v2.1.70/linux/drivers/scsi/aic7xxx.c
• Orig date: Thu Aug 14 20:49:16 1997

diff -u --recursive --new-file v2.1.70/linux/drivers/scsi/aic7xxx.c linux/drivers/scsi/aic7xxx.c
@@ -147,6 +147,8 @@
 #define ALL_TARGETS -1
 #define ALL_CHANNELS '\0'
 #define ALL_LUNS -1
+#define MAX_TARGETS  16
+#define MAX_LUNS     8
 #ifndef TRUE
 #  define TRUE 1
 #endif
@@ -301,7 +303,7 @@
 #ifdef AIC7XXX_TAGGED_QUEUEING_BY_DEVICE
 typedef struct
 {
-  char tag_commands[16];   /* Allow for wide/twin channel adapters. */
+  unsigned char tag_commands[16];   /* Allow for wide/twin channel adapters. */
 } adapter_tag_info_t;
 
 /*
@@ -871,7 +873,7 @@
     long r_total;                            /* total reads */
     long r_total512;                         /* 512 byte blocks read */
     long r_bins[10];                         /* binned reads */
-  } stats[2][16][8];                         /* channel, target, lun */
+  } stats[MAX_TARGETS][MAX_LUNS];            /* [(channel << 3)|target][lun] */
 #endif /* AIC7XXX_PROC_STATS */
 };
 
@@ -969,6 +971,7 @@
  * IO, we'll use them then.
  *
  ***************************************************************************/
+
 static inline unsigned char
 aic_inb(struct aic7xxx_host *p, long port)
 {
@@ -992,15 +995,24 @@
 {
   if (p->maddr != NULL)
   {
+#ifdef __alpha__
+    int i;
+
+    for (i=0; i < size; i++)
+    {
+      p->maddr[port] = valp[i];
+    }
+#else
     __asm __volatile("
       cld;
     1:  lodsb;
       movb %%al,(%0);
       loop 1b"      :
               :
-      "r" ((p)->maddr + (port)),
-      "S" ((valp)), "c" ((size))  :
+      "r" (p->maddr + port),
+      "S" (valp), "c" (size)  :
       "%esi", "%ecx", "%eax");
+#endif
   }
   else
   {
@@ -1439,7 +1451,7 @@
    * If the offset is 0, then the device is requesting asynchronous
    * transfers.
    */
-  if ((*period >= aic7xxx_syncrates[i].period) && *offset != 0)
+  if ((*period <= aic7xxx_syncrates[i - 1].period) && *offset != 0)
   {
     for (i = 0; i < num_aic7xxx_syncrates; i++)
     {
@@ -1970,21 +1982,46 @@
   if ((scb->flags & (SCB_MSGOUT_WDTR | SCB_MSGOUT_SDTR)) != 0)
   {
     unsigned short mask;
+    int message_error = FALSE;
 
     mask = 0x01 << TARGET_INDEX(scb->cmd);
+
+    /*
+     * Check to see if we get an invalid message or a message error
+     * after failing to negotiate a wide or sync transfer message.
+     */
+    if ((scb->flags & SCB_SENSE) && 
+          ((scb->cmd->sense_buffer[12] == 0x43) ||  /* INVALID_MESSAGE */
+          (scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR  */
+    {
+      message_error = TRUE;
+    }
+
     if (scb->flags & SCB_MSGOUT_WDTR)
     {
       p->wdtr_pending &= ~mask;
+      if (message_error)
+      {
+        p->needwdtr &= ~mask;
+        p->needwdtr_copy &= ~mask;
+      }
     }
     if (scb->flags & SCB_MSGOUT_SDTR)
     {
       p->sdtr_pending &= ~mask;
+      if (message_error)
+      {
+        p->needsdtr &= ~mask;
+        p->needsdtr_copy &= ~mask;
+      }
     }
   }
   aic7xxx_free_scb(p, scb);
   aic7xxx_queue_cmd_complete(p, cmd);
 
 #ifdef AIC7XXX_PROC_STATS
+  if ( (cmd->cmnd[0] != TEST_UNIT_READY) &&
+       (cmd->cmnd[0] != INQUIRY) )
   {
     int actual;
 
@@ -2000,7 +2037,7 @@
       long *ptr;
       int x;
 
-      sp = &p->stats[cmd->channel & 0x01][cmd->target & 0x0F][cmd->lun & 0x07];
+      sp = &p->stats[TARGET_INDEX(cmd)][cmd->lun & 0x7];
       sp->xfers++;
 
       if (cmd->request.cmd == WRITE)
@@ -3088,6 +3125,8 @@
             }
             else
             {
+              int send_reject = FALSE;
+
               /*
                * Send our own WDTR in reply.
                */
@@ -3110,14 +3149,25 @@
         	  {
                     bus_width = BUS_8_BIT;
                     scratch &= 0x7F;  /* XXX - FreeBSD doesn't do this. */
+                    send_reject = TRUE;
         	  }
         	  break;
 
         	default:
         	  break;
               }
-              aic7xxx_construct_wdtr(p, /* start byte */ 0, bus_width);
-              outb(SEND_MSG, p->base + RETURN_1);
+              if (send_reject)
+              {
+                outb(SEND_REJ, p->base + RETURN_1);
+                printk(KERN_WARNING "scsi%d: Target %d, channel %c, initiating "
+                       "wide negotiation on a narrow bus - rejecting!",
+                       p->host_no, target, channel);
+              }
+              else
+              {
+                aic7xxx_construct_wdtr(p, /* start byte */ 0, bus_width);
+                outb(SEND_MSG, p->base + RETURN_1);
+              }
             }
             p->needwdtr &= ~target_mask;
             outb(scratch, p->base + TARG_SCRATCH + scratch_offset);
@@ -4062,7 +4112,7 @@
 #ifndef AIC7XXX_TAGGED_QUEUEING_BY_DEVICE
       device->queue_depth = default_depth;
 #else
-      if (p->instance > NUMBER(aic7xxx_tag_info))
+      if (p->instance >= NUMBER(aic7xxx_tag_info))
       {
         device->queue_depth = default_depth;
       }
@@ -5022,7 +5072,7 @@
   scbq_init(&p->scb_data->free_scbs);
   scbq_init(&p->waiting_scbs);
 
-  for (i = 0; i <= NUMBER(p->device_status); i++)
+  for (i = 0; i < NUMBER(p->device_status); i++)
   {
     p->device_status[i].commands_sent = 0;
     p->device_status[i].flags = 0;
@@ -5305,8 +5355,17 @@
     */
   outb(p->qcntmask, p->base + QCNTMASK);
 
-  outb(p->qfullcount, p->base + FIFODEPTH);
-  outb(0, p->base + CMDOUTCNT);
+  /*
+   * Set FIFO depth and command out count.  These are only used when
+   * paging is enabled and should not be touched for AIC-7770 based
+   * adapters; FIFODEPTH and CMDOUTCNT overlay SCSICONF and SCSICONF+1
+   * which are used to control termination.
+   */
+  if (p->flags & PAGE_ENABLED)
+  {
+    outb(p->qfullcount, p->base + FIFODEPTH);
+    outb(0, p->base + CMDOUTCNT);
+  }
 
   /*
    * We don't have any waiting selections or disconnected SCBs.
@@ -5537,7 +5596,6 @@
   {
     case AIC_7770:  /* None of these adapters have seeproms. */
     case AIC_7771:
-    case AIC_7850:
     case AIC_7855:
       break;
 
@@ -5545,6 +5603,7 @@
       have_seeprom = read_284x_seeprom(p, (struct seeprom_config *) scarray);
       break;
 
+    case AIC_7850:  /* The 2910B is a 7850 with a seeprom. */
     case AIC_7861:
     case AIC_7870:
     case AIC_7871:
@@ -5654,7 +5713,11 @@
     scsi_conf = (p->scsi_id & 0x7);
     if (sc->adapter_control & CFSPARITY)
       scsi_conf |= ENSPCHK;
-    if (sc->adapter_control & CFRESETB)
+    /*
+     * The 7850 controllers with a seeprom, do not honor the CFRESETB
+     * flag in the seeprom.  Assume that we want to reset the SCSI bus.
+     */
+    if ((sc->adapter_control & CFRESETB) || (p->chip_class == AIC_7850))
       scsi_conf |= RESET_SCSI;
 
     if ((p->chip_class == AIC_786x) || (p->chip_class == AIC_788x))
@@ -5721,7 +5784,7 @@
    * a NULL entry to indicate that no prior hosts have
    * been found/registered for that IRQ.
    */
-  for (i = 0; i <= NUMBER(aic7xxx_boards); i++)
+  for (i = 0; i < NUMBER(aic7xxx_boards); i++)
   {
     aic7xxx_boards[i] = NULL;
   }
@@ -5787,6 +5850,14 @@
         hcntrl = inb(base + HCNTRL) & IRQMS;  /* Default */
       outb(hcntrl | PAUSE, base + HCNTRL);
 
+      p = aic7xxx_alloc(template, base, 0, chip_type, 0, NULL);
+      if (p == NULL)
+      {
+        printk(KERN_WARNING "aic7xxx: Unable to allocate device space.\n");
+        continue;
+      }
+      aic7xxx_chip_reset(p);
+
       irq = inb(INTDEF + base) & 0x0F;
       switch (irq)
       {
@@ -5800,19 +5871,14 @@
 
         default:
           printk(KERN_WARNING "aic7xxx: Host adapter uses unsupported IRQ "
-          "level, ignoring.\n");
+          "level %d, ignoring.\n", irq);
           irq = 0;
+          aic7xxx_free(p);
           break;
       }
 
       if (irq != 0)
       {
-        p = aic7xxx_alloc(template, base, 0, chip_type, 0, NULL);
-        if (p == NULL)
-        {
-          printk(KERN_WARNING "aic7xxx: Unable to allocate device space.\n");
-          continue;
-        }
         p->irq = irq & 0x0F;
         p->chip_class = AIC_777x;
 #ifdef AIC7XXX_PAGE_ENABLE
@@ -5823,7 +5889,6 @@
         {
           p->flags |= EXTENDED_TRANSLATION;
         }
-        aic7xxx_chip_reset(p);
 
         switch (p->chip_type)
         {
@@ -5985,7 +6050,6 @@
           flags = 0;
           switch (aic7xxx_pci_devices[i].chip_type)
           {
-            case AIC_7850:
             case AIC_7855:
               flags |= USE_DEFAULTS;
               break;
@@ -6887,7 +6951,7 @@
   scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
   base = p->base;
   channel = cmd->channel ? 'B': 'A';
-  tindex = (cmd->channel << 4) | cmd->target;
+  tindex = TARGET_INDEX(cmd);
 
 #ifdef 0   /* AIC7XXX_DEBUG_ABORT */
   if (scb != NULL)
@@ -7128,4 +7192,3 @@
  * tab-width: 8
  * End:
  */
-