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b654edec034a5e5dcc440f2f30fd2aa6c31aef3c
system76-edk2/OvmfPkg/PvScsiDxe/PvScsi.c
Liran Alon b654edec03 OvmfPkg/PvScsiDxe: Setup requests and completions rings 
These rings are shared memory buffers between host and device in which
a cyclic buffer is managed to send request descriptors from host to
device and receive completion descriptors from device to host.

Note that because device may be constrained by IOMMU or guest may be run
under AMD SEV, we make sure to map these rings to device by using
PciIo->Map().

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-14-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2020-03-30 16:45:07 +00:00

995 lines
23 KiB
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/** @file
This driver produces Extended SCSI Pass Thru Protocol instances for
pvscsi devices.
Copyright (C) 2020, Oracle and/or its affiliates.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/Pci.h>
#include <IndustryStandard/PvScsi.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/PciIo.h>
#include <Protocol/PciRootBridgeIo.h>
#include <Uefi/UefiSpec.h>
#include "PvScsi.h"
//
// Higher versions will be used before lower, 0x10-0xffffffef is the version
// range for IHV (Indie Hardware Vendors)
//
#define PVSCSI_BINDING_VERSION 0x10
//
// Ext SCSI Pass Thru utilities
//
/**
Writes a 32-bit value into BAR0 using MMIO
**/
STATIC
EFI_STATUS
PvScsiMmioWrite32 (
IN CONST PVSCSI_DEV *Dev,
IN UINT64 Offset,
IN UINT32 Value
)
{
return Dev->PciIo->Mem.Write (
Dev->PciIo,
EfiPciIoWidthUint32,
PCI_BAR_IDX0,
Offset,
1, // Count
&Value
);
}
/**
Writes multiple words of data into BAR0 using MMIO
**/
STATIC
EFI_STATUS
PvScsiMmioWrite32Multiple (
IN CONST PVSCSI_DEV *Dev,
IN UINT64 Offset,
IN UINTN Count,
IN UINT32 *Words
)
{
return Dev->PciIo->Mem.Write (
Dev->PciIo,
EfiPciIoWidthFifoUint32,
PCI_BAR_IDX0,
Offset,
Count,
Words
);
}
/**
Send a PVSCSI command to device.
@param[in] Dev The pvscsi host device.
@param[in] Cmd The command to send to device.
@param[in] OPTIONAL DescWords An optional command descriptor (If command
have a descriptor). The descriptor is
provided as an array of UINT32 words and
is must be 32-bit aligned.
@param[in] DescWordsCount The number of words in command descriptor.
Caller must specify here 0 if DescWords
is not supplied (It is optional). In that
case, DescWords is ignored.
@return Status codes returned by Dev->PciIo->Mem.Write().
**/
STATIC
EFI_STATUS
PvScsiWriteCmdDesc (
IN CONST PVSCSI_DEV *Dev,
IN UINT32 Cmd,
IN UINT32 *DescWords OPTIONAL,
IN UINTN DescWordsCount
)
{
EFI_STATUS Status;
if (DescWordsCount > PVSCSI_MAX_CMD_DATA_WORDS) {
return EFI_INVALID_PARAMETER;
}
Status = PvScsiMmioWrite32 (Dev, PvScsiRegOffsetCommand, Cmd);
if (EFI_ERROR (Status)) {
return Status;
}
if (DescWordsCount > 0) {
return PvScsiMmioWrite32Multiple (
Dev,
PvScsiRegOffsetCommandData,
DescWordsCount,
DescWords
);
}
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
PvScsiResetAdapter (
IN CONST PVSCSI_DEV *Dev
)
{
return PvScsiWriteCmdDesc (Dev, PvScsiCmdAdapterReset, NULL, 0);
}
/**
Check if Target argument to EXT_SCSI_PASS_THRU.GetNextTarget() and
EXT_SCSI_PASS_THRU.GetNextTargetLun() is initialized
**/
STATIC
BOOLEAN
IsTargetInitialized (
IN UINT8 *Target
)
{
UINTN Idx;
for (Idx = 0; Idx < TARGET_MAX_BYTES; ++Idx) {
if (Target[Idx] != 0xFF) {
return TRUE;
}
}
return FALSE;
}
//
// Ext SCSI Pass Thru
//
STATIC
EFI_STATUS
EFIAPI
PvScsiPassThru (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet,
IN EFI_EVENT Event OPTIONAL
)
{
return EFI_UNSUPPORTED;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiGetNextTargetLun (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN OUT UINT8 **Target,
IN OUT UINT64 *Lun
)
{
UINT8 *TargetPtr;
UINT8 LastTarget;
PVSCSI_DEV *Dev;
if (Target == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// The Target input parameter is unnecessarily a pointer-to-pointer
//
TargetPtr = *Target;
//
// If target not initialized, return first target & LUN
//
if (!IsTargetInitialized (TargetPtr)) {
ZeroMem (TargetPtr, TARGET_MAX_BYTES);
*Lun = 0;
return EFI_SUCCESS;
}
//
// We only use first byte of target identifer
//
LastTarget = *TargetPtr;
//
// Increment (target, LUN) pair if valid on input
//
Dev = PVSCSI_FROM_PASS_THRU (This);
if (LastTarget > Dev->MaxTarget || *Lun > Dev->MaxLun) {
return EFI_INVALID_PARAMETER;
}
if (*Lun < Dev->MaxLun) {
++*Lun;
return EFI_SUCCESS;
}
if (LastTarget < Dev->MaxTarget) {
*Lun = 0;
++LastTarget;
*TargetPtr = LastTarget;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiBuildDevicePath (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun,
IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
)
{
UINT8 TargetValue;
PVSCSI_DEV *Dev;
SCSI_DEVICE_PATH *ScsiDevicePath;
if (DevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// We only use first byte of target identifer
//
TargetValue = *Target;
Dev = PVSCSI_FROM_PASS_THRU (This);
if (TargetValue > Dev->MaxTarget || Lun > Dev->MaxLun) {
return EFI_NOT_FOUND;
}
ScsiDevicePath = AllocatePool (sizeof (*ScsiDevicePath));
if (ScsiDevicePath == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ScsiDevicePath->Header.Type = MESSAGING_DEVICE_PATH;
ScsiDevicePath->Header.SubType = MSG_SCSI_DP;
ScsiDevicePath->Header.Length[0] = (UINT8)sizeof (*ScsiDevicePath);
ScsiDevicePath->Header.Length[1] = (UINT8)(sizeof (*ScsiDevicePath) >> 8);
ScsiDevicePath->Pun = TargetValue;
ScsiDevicePath->Lun = (UINT16)Lun;
*DevicePath = &ScsiDevicePath->Header;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiGetTargetLun (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
OUT UINT8 **Target,
OUT UINT64 *Lun
)
{
SCSI_DEVICE_PATH *ScsiDevicePath;
PVSCSI_DEV *Dev;
if (DevicePath == NULL || Target == NULL || *Target == NULL || Lun == NULL) {
return EFI_INVALID_PARAMETER;
}
if (DevicePath->Type != MESSAGING_DEVICE_PATH ||
DevicePath->SubType != MSG_SCSI_DP) {
return EFI_UNSUPPORTED;
}
ScsiDevicePath = (SCSI_DEVICE_PATH *)DevicePath;
Dev = PVSCSI_FROM_PASS_THRU (This);
if (ScsiDevicePath->Pun > Dev->MaxTarget ||
ScsiDevicePath->Lun > Dev->MaxLun) {
return EFI_NOT_FOUND;
}
//
// We only use first byte of target identifer
//
**Target = (UINT8)ScsiDevicePath->Pun;
ZeroMem (*Target + 1, TARGET_MAX_BYTES - 1);
*Lun = ScsiDevicePath->Lun;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiResetChannel (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This
)
{
return EFI_UNSUPPORTED;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiResetTargetLun (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN UINT8 *Target,
IN UINT64 Lun
)
{
return EFI_UNSUPPORTED;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiGetNextTarget (
IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL *This,
IN OUT UINT8 **Target
)
{
UINT8 *TargetPtr;
UINT8 LastTarget;
PVSCSI_DEV *Dev;
if (Target == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// The Target input parameter is unnecessarily a pointer-to-pointer
//
TargetPtr = *Target;
//
// If target not initialized, return first target
//
if (!IsTargetInitialized (TargetPtr)) {
ZeroMem (TargetPtr, TARGET_MAX_BYTES);
return EFI_SUCCESS;
}
//
// We only use first byte of target identifer
//
LastTarget = *TargetPtr;
//
// Increment target if valid on input
//
Dev = PVSCSI_FROM_PASS_THRU (This);
if (LastTarget > Dev->MaxTarget) {
return EFI_INVALID_PARAMETER;
}
if (LastTarget < Dev->MaxTarget) {
++LastTarget;
*TargetPtr = LastTarget;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
STATIC
EFI_STATUS
PvScsiSetPciAttributes (
IN OUT PVSCSI_DEV *Dev
)
{
EFI_STATUS Status;
//
// Backup original PCI Attributes
//
Status = Dev->PciIo->Attributes (
Dev->PciIo,
EfiPciIoAttributeOperationGet,
0,
&Dev->OriginalPciAttributes
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Enable MMIO-Space & Bus-Mastering
//
Status = Dev->PciIo->Attributes (
Dev->PciIo,
EfiPciIoAttributeOperationEnable,
(EFI_PCI_IO_ATTRIBUTE_MEMORY |
EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
STATIC
VOID
PvScsiRestorePciAttributes (
IN PVSCSI_DEV *Dev
)
{
Dev->PciIo->Attributes (
Dev->PciIo,
EfiPciIoAttributeOperationSet,
Dev->OriginalPciAttributes,
NULL
);
}
STATIC
EFI_STATUS
PvScsiAllocateSharedPages (
IN PVSCSI_DEV *Dev,
IN UINTN Pages,
OUT VOID **HostAddress,
OUT PVSCSI_DMA_DESC *DmaDesc
)
{
EFI_STATUS Status;
UINTN NumberOfBytes;
Status = Dev->PciIo->AllocateBuffer (
Dev->PciIo,
AllocateAnyPages,
EfiBootServicesData,
Pages,
HostAddress,
EFI_PCI_ATTRIBUTE_MEMORY_CACHED
);
if (EFI_ERROR (Status)) {
return Status;
}
NumberOfBytes = EFI_PAGES_TO_SIZE (Pages);
Status = Dev->PciIo->Map (
Dev->PciIo,
EfiPciIoOperationBusMasterCommonBuffer,
*HostAddress,
&NumberOfBytes,
&DmaDesc->DeviceAddress,
&DmaDesc->Mapping
);
if (EFI_ERROR (Status)) {
goto FreeBuffer;
}
if (NumberOfBytes != EFI_PAGES_TO_SIZE (Pages)) {
Status = EFI_OUT_OF_RESOURCES;
goto Unmap;
}
return EFI_SUCCESS;
Unmap:
Dev->PciIo->Unmap (Dev->PciIo, DmaDesc->Mapping);
FreeBuffer:
Dev->PciIo->FreeBuffer (Dev->PciIo, Pages, *HostAddress);
return Status;
}
STATIC
VOID
PvScsiFreeSharedPages (
IN PVSCSI_DEV *Dev,
IN UINTN Pages,
IN VOID *HostAddress,
IN PVSCSI_DMA_DESC *DmaDesc
)
{
Dev->PciIo->Unmap (Dev->PciIo, DmaDesc->Mapping);
Dev->PciIo->FreeBuffer (Dev->PciIo, Pages, HostAddress);
}
STATIC
EFI_STATUS
PvScsiInitRings (
IN OUT PVSCSI_DEV *Dev
)
{
EFI_STATUS Status;
union {
PVSCSI_CMD_DESC_SETUP_RINGS Cmd;
UINT32 Uint32;
} AlignedCmd;
PVSCSI_CMD_DESC_SETUP_RINGS *Cmd;
Cmd = &AlignedCmd.Cmd;
Status = PvScsiAllocateSharedPages (
Dev,
1,
(VOID **)&Dev->RingDesc.RingState,
&Dev->RingDesc.RingStateDmaDesc
);
if (EFI_ERROR (Status)) {
return Status;
}
ZeroMem (Dev->RingDesc.RingState, EFI_PAGE_SIZE);
Status = PvScsiAllocateSharedPages (
Dev,
1,
(VOID **)&Dev->RingDesc.RingReqs,
&Dev->RingDesc.RingReqsDmaDesc
);
if (EFI_ERROR (Status)) {
goto FreeRingState;
}
ZeroMem (Dev->RingDesc.RingReqs, EFI_PAGE_SIZE);
Status = PvScsiAllocateSharedPages (
Dev,
1,
(VOID **)&Dev->RingDesc.RingCmps,
&Dev->RingDesc.RingCmpsDmaDesc
);
if (EFI_ERROR (Status)) {
goto FreeRingReqs;
}
ZeroMem (Dev->RingDesc.RingCmps, EFI_PAGE_SIZE);
ZeroMem (Cmd, sizeof (*Cmd));
Cmd->ReqRingNumPages = 1;
Cmd->CmpRingNumPages = 1;
Cmd->RingsStatePPN = RShiftU64 (
Dev->RingDesc.RingStateDmaDesc.DeviceAddress,
EFI_PAGE_SHIFT
);
Cmd->ReqRingPPNs[0] = RShiftU64 (
Dev->RingDesc.RingReqsDmaDesc.DeviceAddress,
EFI_PAGE_SHIFT
);
Cmd->CmpRingPPNs[0] = RShiftU64 (
Dev->RingDesc.RingCmpsDmaDesc.DeviceAddress,
EFI_PAGE_SHIFT
);
STATIC_ASSERT (
sizeof (*Cmd) % sizeof (UINT32) == 0,
"Cmd must be multiple of 32-bit words"
);
Status = PvScsiWriteCmdDesc (
Dev,
PvScsiCmdSetupRings,
(UINT32 *)Cmd,
sizeof (*Cmd) / sizeof (UINT32)
);
if (EFI_ERROR (Status)) {
goto FreeRingCmps;
}
return EFI_SUCCESS;
FreeRingCmps:
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingCmps,
&Dev->RingDesc.RingCmpsDmaDesc
);
FreeRingReqs:
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingReqs,
&Dev->RingDesc.RingReqsDmaDesc
);
FreeRingState:
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingState,
&Dev->RingDesc.RingStateDmaDesc
);
return Status;
}
STATIC
VOID
PvScsiFreeRings (
IN OUT PVSCSI_DEV *Dev
)
{
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingCmps,
&Dev->RingDesc.RingCmpsDmaDesc
);
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingReqs,
&Dev->RingDesc.RingReqsDmaDesc
);
PvScsiFreeSharedPages (
Dev,
1,
Dev->RingDesc.RingState,
&Dev->RingDesc.RingStateDmaDesc
);
}
STATIC
EFI_STATUS
PvScsiInit (
IN OUT PVSCSI_DEV *Dev
)
{
EFI_STATUS Status;
//
// Init configuration
//
Dev->MaxTarget = PcdGet8 (PcdPvScsiMaxTargetLimit);
Dev->MaxLun = PcdGet8 (PcdPvScsiMaxLunLimit);
//
// Set PCI Attributes
//
Status = PvScsiSetPciAttributes (Dev);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Reset adapter
//
Status = PvScsiResetAdapter (Dev);
if (EFI_ERROR (Status)) {
goto RestorePciAttributes;
}
//
// Init PVSCSI rings
//
Status = PvScsiInitRings (Dev);
if (EFI_ERROR (Status)) {
goto RestorePciAttributes;
}
//
// Populate the exported interface's attributes
//
Dev->PassThru.Mode = &Dev->PassThruMode;
Dev->PassThru.PassThru = &PvScsiPassThru;
Dev->PassThru.GetNextTargetLun = &PvScsiGetNextTargetLun;
Dev->PassThru.BuildDevicePath = &PvScsiBuildDevicePath;
Dev->PassThru.GetTargetLun = &PvScsiGetTargetLun;
Dev->PassThru.ResetChannel = &PvScsiResetChannel;
Dev->PassThru.ResetTargetLun = &PvScsiResetTargetLun;
Dev->PassThru.GetNextTarget = &PvScsiGetNextTarget;
//
// AdapterId is a target for which no handle will be created during bus scan.
// Prevent any conflict with real devices.
//
Dev->PassThruMode.AdapterId = MAX_UINT32;
//
// Set both physical and logical attributes for non-RAID SCSI channel
//
Dev->PassThruMode.Attributes = EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_PHYSICAL |
EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_LOGICAL;
//
// No restriction on transfer buffer alignment
//
Dev->PassThruMode.IoAlign = 0;
return EFI_SUCCESS;
RestorePciAttributes:
PvScsiRestorePciAttributes (Dev);
return Status;
}
STATIC
VOID
PvScsiUninit (
IN OUT PVSCSI_DEV *Dev
)
{
//
// Reset device to stop device usage of the rings.
// This is required to safely free the rings.
//
PvScsiResetAdapter (Dev);
PvScsiFreeRings (Dev);
PvScsiRestorePciAttributes (Dev);
}
//
// Driver Binding
//
STATIC
EFI_STATUS
EFIAPI
PvScsiDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
PCI_TYPE00 Pci;
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
(VOID **)&PciIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0,
sizeof (Pci) / sizeof (UINT32),
&Pci
);
if (EFI_ERROR (Status)) {
goto Done;
}
if ((Pci.Hdr.VendorId != PCI_VENDOR_ID_VMWARE) ||
(Pci.Hdr.DeviceId != PCI_DEVICE_ID_VMWARE_PVSCSI)) {
Status = EFI_UNSUPPORTED;
goto Done;
}
Status = EFI_SUCCESS;
Done:
gBS->CloseProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
PVSCSI_DEV *Dev;
EFI_STATUS Status;
Dev = (PVSCSI_DEV *) AllocateZeroPool (sizeof (*Dev));
if (Dev == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
(VOID **)&Dev->PciIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
goto FreePvScsi;
}
Status = PvScsiInit (Dev);
if (EFI_ERROR (Status)) {
goto ClosePciIo;
}
//
// Setup complete, attempt to export the driver instance's PassThru interface
//
Dev->Signature = PVSCSI_SIG;
Status = gBS->InstallProtocolInterface (
&ControllerHandle,
&gEfiExtScsiPassThruProtocolGuid,
EFI_NATIVE_INTERFACE,
&Dev->PassThru
);
if (EFI_ERROR (Status)) {
goto UninitDev;
}
return EFI_SUCCESS;
UninitDev:
PvScsiUninit (Dev);
ClosePciIo:
gBS->CloseProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
FreePvScsi:
FreePool (Dev);
return Status;
}
STATIC
EFI_STATUS
EFIAPI
PvScsiDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
EFI_EXT_SCSI_PASS_THRU_PROTOCOL *PassThru;
PVSCSI_DEV *Dev;
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiExtScsiPassThruProtocolGuid,
(VOID **)&PassThru,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL // Lookup only
);
if (EFI_ERROR (Status)) {
return Status;
}
Dev = PVSCSI_FROM_PASS_THRU (PassThru);
Status = gBS->UninstallProtocolInterface (
ControllerHandle,
&gEfiExtScsiPassThruProtocolGuid,
&Dev->PassThru
);
if (EFI_ERROR (Status)) {
return Status;
}
PvScsiUninit (Dev);
gBS->CloseProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
FreePool (Dev);
return EFI_SUCCESS;
}
STATIC EFI_DRIVER_BINDING_PROTOCOL mPvScsiDriverBinding = {
&PvScsiDriverBindingSupported,
&PvScsiDriverBindingStart,
&PvScsiDriverBindingStop,
PVSCSI_BINDING_VERSION,
NULL, // ImageHandle, filled by EfiLibInstallDriverBindingComponentName2()
NULL // DriverBindingHandle, filled as well
};
//
// Component Name
//
STATIC EFI_UNICODE_STRING_TABLE mDriverNameTable[] = {
{ "eng;en", L"PVSCSI Host Driver" },
{ NULL, NULL }
};
STATIC EFI_COMPONENT_NAME_PROTOCOL mComponentName;
STATIC
EFI_STATUS
EFIAPI
PvScsiGetDriverName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName
)
{
return LookupUnicodeString2 (
Language,
This->SupportedLanguages,
mDriverNameTable,
DriverName,
(BOOLEAN)(This == &mComponentName) // Iso639Language
);
}
STATIC
EFI_STATUS
EFIAPI
PvScsiGetDeviceName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE DeviceHandle,
IN EFI_HANDLE ChildHandle,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
)
{
return EFI_UNSUPPORTED;
}
STATIC EFI_COMPONENT_NAME_PROTOCOL mComponentName = {
&PvScsiGetDriverName,
&PvScsiGetDeviceName,
"eng" // SupportedLanguages, ISO 639-2 language codes
};
STATIC EFI_COMPONENT_NAME2_PROTOCOL mComponentName2 = {
(EFI_COMPONENT_NAME2_GET_DRIVER_NAME) &PvScsiGetDriverName,
(EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) &PvScsiGetDeviceName,
"en" // SupportedLanguages, RFC 4646 language codes
};
//
// Entry Point
//
EFI_STATUS
EFIAPI
PvScsiEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&mPvScsiDriverBinding,
ImageHandle,
&mComponentName,
&mComponentName2
);
}
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