OvmfPkg/PvScsiDxe: Enable device 64-bit DMA addresses

Enable PCI dual-address cycle attribute to signal device
supports 64-bit DMA addresses.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-18-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>

diff --git a/OvmfPkg/PvScsiDxe/PvScsi.c b/OvmfPkg/PvScsiDxe/PvScsi.c
index d7f0d3c8790c93e465947c3e67d2a268c52c69d1..0a66c98421a91a96c543e3ec913cb46b8201d9b9 100644 (file)
--- a/OvmfPkg/PvScsiDxe/PvScsi.c
+++ b/OvmfPkg/PvScsiDxe/PvScsi.c
@@ -874,6 +874,29 @@ PvScsiSetPciAttributes (
     return Status;\r
   }\r
 \r
+  //\r
+  // Signal device supports 64-bit DMA addresses\r
+  //\r
+  Status = Dev->PciIo->Attributes (\r
+                         Dev->PciIo,\r
+                         EfiPciIoAttributeOperationEnable,\r
+                         EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE,\r
+                         NULL\r
+                         );\r
+  if (EFI_ERROR (Status)) {\r
+    //\r
+    // Warn user that device will only be using 32-bit DMA addresses.\r
+    //\r
+    // Note that this does not prevent the device/driver from working\r
+    // and therefore we only warn and continue as usual.\r
+    //\r
+    DEBUG ((\r
+      DEBUG_WARN,\r
+      "%a: failed to enable 64-bit DMA addresses\n",\r
+      __FUNCTION__\r
+      ));\r
+  }\r
+\r
   return EFI_SUCCESS;\r
 }\r
 \r