Changeset 604 for GPL/trunk/lib32/pci.c

Timestamp:

Jan 8, 2018, 2:07:36 AM (8 years ago)

Author:

David Azarewicz

Message:

Incorporated changes from Andy.
Added limited MSI support.

File:

• GPL/trunk/lib32/pci.c (modified) (2 diffs)

GPL/trunk/lib32/pci.c

@@ -245 +245 @@
           pcidev->irq_resource[0].start = pcidev->irq_resource[0].end   = ulTmp1 & 0xffff;
           pcidev->irq = (u8)ulTmp1; // This is the interrupt used for init time processing
+          pcidev->irq_pin = ulTmp1>>8;
         }
 
@@ -1015 +1016 @@
 }
 
+#ifdef USE_MSI
+extern int __syscall UniMsiAlloc(USHORT usBusDevFunc, ULONG *pulCount, UCHAR *pucIrq);
+int snd_pci_enable_msi(struct pci_dev *dev)
+{
+  ULONG p;
+  UCHAR irq;
+
+  if (dev->irq_pin)
+  {
+    p = 1; /* int count */
+    if (UniMsiAlloc((dev->bus->number<<8) | dev->devfn, &p, &irq)) return -1;
+    /* we have an msi interrupt */
+    dev->irq = irq;
+    dev->irq_pin = 0;
+  }
+  return 0;
+}
+#else
+int snd_pci_enable_msi(struct pci_dev *dev)
+{
+  return -1;
+}
+#endif
+