X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OvmfPkg%2FVirtioScsiDxe%2FVirtioScsi.c;h=a983b3df7b9caf2d1490af8ec6b0dee7cfc45129;hp=2cb3f43bb01c25c29297f0e7027d11dcd5391b8d;hb=53a4c6047f3ce2ece7bb8db5b9815a1c9227dddb;hpb=faba4a14de81d4f20aa07336e7433835edd760f8

diff --git a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
index 2cb3f43bb0..a983b3df7b 100644
--- a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
+++ b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c
@@ -27,6 +27,7 @@
 
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc, All rights reserved.<BR>
 
   This program and the accompanying materials are licensed and made available
   under the terms and conditions of the BSD License which accompanies this
@@ -470,7 +471,7 @@ VirtioScsiPassThru (
   // caller retry.
   //
   if (VirtioFlush (Dev->VirtIo, VIRTIO_SCSI_REQUEST_QUEUE, &Dev->Ring,
-        &Indices) != EFI_SUCCESS) {
+        &Indices, NULL) != EFI_SUCCESS) {
     Packet->InTransferLength  = 0;
     Packet->OutTransferLength = 0;
     Packet->HostAdapterStatus = EFI_EXT_SCSI_STATUS_HOST_ADAPTER_OTHER;
@@ -707,7 +708,7 @@ VirtioScsiInit (
   UINT8      NextDevStat;
   EFI_STATUS Status;
 
-  UINT32     Features;
+  UINT64     Features;
   UINT16     MaxChannel; // for validation only
   UINT32     NumQueues;  // for validation only
   UINT16     QueueSize;
@@ -800,6 +801,19 @@ VirtioScsiInit (
     goto Failed;
   }
 
+  Features &= VIRTIO_SCSI_F_INOUT | VIRTIO_F_VERSION_1;
+
+  //
+  // In virtio-1.0, feature negotiation is expected to complete before queue
+  // discovery, and the device can also reject the selected set of features.
+  //
+  if (Dev->VirtIo->Revision >= VIRTIO_SPEC_REVISION (1, 0, 0)) {
+    Status = Virtio10WriteFeatures (Dev->VirtIo, Features, &NextDevStat);
+    if (EFI_ERROR (Status)) {
+      goto Failed;
+    }
+  }
+
   //
   // step 4b -- allocate request virtqueue
   //
@@ -819,7 +833,7 @@ VirtioScsiInit (
     goto Failed;
   }
 
-  Status = VirtioRingInit (QueueSize, &Dev->Ring);
+  Status = VirtioRingInit (Dev->VirtIo, QueueSize, &Dev->Ring);
   if (EFI_ERROR (Status)) {
     goto Failed;
   }
@@ -841,21 +855,20 @@ VirtioScsiInit (
   //
   // step 4c -- Report GPFN (guest-physical frame number) of queue.
   //
-  Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo,
-      (UINT32) ((UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT));
+  Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, &Dev->Ring, 0);
   if (EFI_ERROR (Status)) {
     goto ReleaseQueue;
   }
 
   //
-  // step 5 -- Report understood features and guest-tuneables. We want none of
-  // the known (or unknown) VIRTIO_SCSI_F_* or VIRTIO_F_* capabilities (see
-  // virtio-0.9.5, Appendices B and I), except bidirectional transfers.
+  // step 5 -- Report understood features and guest-tuneables.
   //
-  Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo,
-      Features & VIRTIO_SCSI_F_INOUT);
-  if (EFI_ERROR (Status)) {
-    goto ReleaseQueue;
+  if (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) {
+    Features &= ~(UINT64)VIRTIO_F_VERSION_1;
+    Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);
+    if (EFI_ERROR (Status)) {
+      goto ReleaseQueue;
+    }
   }
 
   //
@@ -914,7 +927,7 @@ VirtioScsiInit (
   return EFI_SUCCESS;
 
 ReleaseQueue:
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
 Failed:
   //
@@ -933,7 +946,6 @@ Failed:
 }
 
 
-
 STATIC
 VOID
 EFIAPI
@@ -953,13 +965,39 @@ VirtioScsiUninit (
   Dev->MaxLun         = 0;
   Dev->MaxSectors     = 0;
 
-  VirtioRingUninit (&Dev->Ring);
+  VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
 
   SetMem (&Dev->PassThru,     sizeof Dev->PassThru,     0x00);
   SetMem (&Dev->PassThruMode, sizeof Dev->PassThruMode, 0x00);
 }
 
 
+//
+// Event notification function enqueued by ExitBootServices().
+//
+
+STATIC
+VOID
+EFIAPI
+VirtioScsiExitBoot (
+  IN  EFI_EVENT Event,
+  IN  VOID      *Context
+  )
+{
+  VSCSI_DEV *Dev;
+
+  //
+  // Reset the device. This causes the hypervisor to forget about the virtio
+  // ring.
+  //
+  // We allocated said ring in EfiBootServicesData type memory, and code
+  // executing after ExitBootServices() is permitted to overwrite it.
+  //
+  Dev = Context;
+  Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
+}
+
+
 //
 // Probe, start and stop functions of this driver, called by the DXE core for
 // specific devices.
@@ -1050,6 +1088,12 @@ VirtioScsiDriverBindingStart (
     goto CloseVirtIo;
   }
 
+  Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK,
+                  &VirtioScsiExitBoot, Dev, &Dev->ExitBoot);
+  if (EFI_ERROR (Status)) {
+    goto UninitDev;
+  }
+
   //
   // Setup complete, attempt to export the driver instance's PassThru
   // interface.
@@ -1059,11 +1103,14 @@ VirtioScsiDriverBindingStart (
                   &gEfiExtScsiPassThruProtocolGuid, EFI_NATIVE_INTERFACE,
                   &Dev->PassThru);
   if (EFI_ERROR (Status)) {
-    goto UninitDev;
+    goto CloseExitBoot;
   }
 
   return EFI_SUCCESS;
 
+CloseExitBoot:
+  gBS->CloseEvent (Dev->ExitBoot);
+
 UninitDev:
   VirtioScsiUninit (Dev);
 
@@ -1114,6 +1161,8 @@ VirtioScsiDriverBindingStop (
     return Status;
   }
 
+  gBS->CloseEvent (Dev->ExitBoot);
+
   VirtioScsiUninit (Dev);
 
   gBS->CloseProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid,