Changeset 110 for trunk/src/os2ahci/ahci.c

Timestamp:

Jun 21, 2011, 2:39:30 PM (14 years ago)

Author:

Markus Thielen

Message:

contains CMs changes for unaligned buffers; removed unused stack var; let driver continue boot on unknown command line switch

File:

• trunk/src/os2ahci/ahci.c (modified) (2 diffs)

trunk/src/os2ahci/ahci.c

@@ -1300 +1300 @@
 
   if (handled) {
-    /* trigger state machine to process next IORBs, if any */
-    spin_lock(drv_lock);
-    trigger_engine();
-    spin_unlock(drv_lock);
+    /* Trigger state machine to process next IORBs, if any. Due to excessive
+     * IORB requeue operations (e.g. when processing large unaligned reads or
+     * writes), we may be stacking interrupts on top of each other. If we
+     * detect this, we'll pass this on to the engine context hook.
+     */
+    if ((u16) (u32) (void _far *) &irq_stat < 0xf000) {
+      ddprintf("IRQ stack running low; arming engine context hook\n");
+      DevHelp_ArmCtxHook(0, engine_ctxhook_h);
+
+    } else {
+      spin_lock(drv_lock);
+      trigger_engine();
+      spin_unlock(drv_lock);
+    }
 
     /* complete the interrupt */
@@ -1328 +1338 @@
   u32 done_mask;
 
-  ddprintf("port interrupt for adapter #%d, port #%d\n", ad_no(ai), p);
+  ddprintf("port interrupt for adapter #%d, port #%d, stack frame %Fp\n", ad_no(ai),
+           p, (void _far *) &done_queue);
   memset(&done_queue, 0x00, sizeof(done_queue));