56f65ed838
This change replaces the accesses to the PCI bus from the Block, Scsi and Net drivers by the use of the new VIRTIO_DEVICE_PROTOCOL protocol that abstracts the transport layer. It means these drivers can be used on PCI and MMIO transport layer. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> v5: - VirtioFlush(): update comment block in VirtioLib.[hc]; error code is propagated from VirtIo->SetQueueNotify(). - VirtioBlkInit(): jump to Failed label if SetPageSize() fails - VirtioBlkInit(): fixup comment, and add error handling, near SetQueueNum() call - VirtioBlkDriverBindingStart(): remove redundant (always false) check for a subsystem device ID different from VIRTIO_SUBSYSTEM_BLOCK_DEVICE; VirtioBlkDriverBindingSupported() handles it already - VirtioNetGetFeatures(): update stale comment block - VirtioNetGetFeatures(): retrieve MAC address byte for byte (open-coded loop) - VirtioNetDriverBindingStart(): remove redundant (always false) check for a subsystem device ID different from VIRTIO_SUBSYSTEM_NETWORK_CARD; VirtioNetDriverBindingSupported() handles it already - VirtioNetInitRing(): call SetQueueNum() and SetQueueAlign() for proper MMIO operation - VirtioNetInitialize(): fix destination error label for when SetPageSize() fails - VirtioScsi.c: fix comment block of VIRTIO_CFG_WRITE()/VIRTIO_CFG_READ() - VirtioScsiInit(): fix destination error label for when SetPageSize() fails - VirtioScsiInit(): call SetQueueNum() and SetQueueAlign() for proper MMIO operation Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14966 6f19259b-4bc3-4df7-8a09-765794883524
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/** @file
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Implements
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- the SNM.WaitForPacket EVT_NOTIFY_WAIT event,
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- the EVT_SIGNAL_EXIT_BOOT_SERVICES event
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for the virtio-net driver.
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Copyright (C) 2013, Red Hat, Inc.
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Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/BaseLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include "VirtioNet.h"
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/**
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Invoke a notification event
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@param Event Event whose notification function is being
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invoked.
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@param Context The pointer to the notification function's
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context, which is implementation-dependent.
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**/
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VOID
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EFIAPI
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VirtioNetIsPacketAvailable (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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//
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// This callback has been enqueued by an external application and is
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// running at TPL_CALLBACK already.
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//
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// The WaitForPacket logic is similar to that of WaitForKey. The former has
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// almost no documentation in either the UEFI-2.3.1+errC spec or the
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// DWG-2.3.1, but WaitForKey does have some.
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//
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VNET_DEV *Dev;
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UINT16 RxCurUsed;
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Dev = Context;
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if (Dev->Snm.State != EfiSimpleNetworkInitialized) {
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return;
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}
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//
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// virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device
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//
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MemoryFence ();
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RxCurUsed = *Dev->RxRing.Used.Idx;
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MemoryFence ();
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if (Dev->RxLastUsed != RxCurUsed) {
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gBS->SignalEvent (&Dev->Snp.WaitForPacket);
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}
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}
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VOID
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EFIAPI
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VirtioNetExitBoot (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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//
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// This callback has been enqueued by ExitBootServices() and is running at
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// TPL_CALLBACK already.
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//
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// Shut down pending transfers according to DWG-2.3.1, "25.5.1 Exit Boot
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// Services Event".
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//
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VNET_DEV *Dev;
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Dev = Context;
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if (Dev->Snm.State == EfiSimpleNetworkInitialized) {
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Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
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}
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}
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