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audk/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpress.c

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/** @file
NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows
NVM Express specification.
Copyright (c) 2013, Intel Corporation. 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 distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "NvmExpress.h"
//
// NVM Express Driver Binding Protocol Instance
//
EFI_DRIVER_BINDING_PROTOCOL gNvmExpressDriverBinding = {
NvmExpressDriverBindingSupported,
NvmExpressDriverBindingStart,
NvmExpressDriverBindingStop,
0x10,
NULL,
NULL
};
//
// NVM Express EFI Driver Supported EFI Version Protocol Instance
//
EFI_DRIVER_SUPPORTED_EFI_VERSION_PROTOCOL gNvmExpressDriverSupportedEfiVersion = {
sizeof (EFI_DRIVER_SUPPORTED_EFI_VERSION_PROTOCOL), // Size of Protocol structure.
0 // Version number to be filled at start up.
};
/**
Check if the specified Nvm Express device namespace is active, and create child handles
for them with BlockIo and DiskInfo protocol instances.
@param[in] Private The pointer to the NVME_CONTROLLER_PRIVATE_DATA data structure.
@param[in] NamespaceId The NVM Express namespace ID for which a device path node is to be
allocated and built. Caller must set the NamespaceId to zero if the
device path node will contain a valid UUID.
@param[in] NamespaceUuid The NVM Express namespace UUID for which a device path node is to be
allocated and built. UUID will only be valid of the Namespace ID is zero.
@retval EFI_SUCCESS All the namespaces in the device are successfully enumerated.
@return Others Some error occurs when enumerating the namespaces.
**/
EFI_STATUS
EnumerateNvmeDevNamespace (
IN NVME_CONTROLLER_PRIVATE_DATA *Private,
UINT32 NamespaceId,
UINT64 NamespaceUuid
)
{
NVME_ADMIN_NAMESPACE_DATA *NamespaceData;
EFI_DEVICE_PATH_PROTOCOL *NewDevicePathNode;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_HANDLE DeviceHandle;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
NVME_DEVICE_PRIVATE_DATA *Device;
EFI_STATUS Status;
UINT32 Lbads;
UINT32 Flbas;
UINT32 LbaFmtIdx;
NewDevicePathNode = NULL;
DevicePath = NULL;
Device = NULL;
//
// Allocate a buffer for Identify Namespace data
//
NamespaceData = AllocateZeroPool(sizeof (NVME_ADMIN_NAMESPACE_DATA));
if(NamespaceData == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ParentDevicePath = Private->ParentDevicePath;
//
// Identify Namespace
//
Status = NvmeIdentifyNamespace (
Private,
NamespaceId,
(VOID *)NamespaceData
);
if (EFI_ERROR(Status)) {
goto Exit;
}
//
// Validate Namespace
//
if (NamespaceData->Ncap == 0) {
Status = EFI_DEVICE_ERROR;
} else {
//
// allocate device private data for each discovered namespace
//
Device = AllocateZeroPool(sizeof(NVME_DEVICE_PRIVATE_DATA));
if (Device == NULL) {
goto Exit;
}
//
// Initialize SSD namespace instance data
//
Device->Signature = NVME_DEVICE_PRIVATE_DATA_SIGNATURE;
Device->NamespaceId = NamespaceId;
Device->NamespaceUuid = NamespaceData->Eui64;
Device->ControllerHandle = Private->ControllerHandle;
Device->DriverBindingHandle = Private->DriverBindingHandle;
Device->Controller = Private;
//
// Build BlockIo media structure
//
Device->Media.MediaId = 0;
Device->Media.RemovableMedia = FALSE;
Device->Media.MediaPresent = TRUE;
Device->Media.LogicalPartition = FALSE;
Device->Media.ReadOnly = FALSE;
Device->Media.WriteCaching = FALSE;
Flbas = NamespaceData->Flbas;
LbaFmtIdx = Flbas & 3;
Lbads = NamespaceData->LbaFormat[LbaFmtIdx].Lbads;
Device->Media.BlockSize = (UINT32)1 << Lbads;
Device->Media.LastBlock = NamespaceData->Nsze - 1;
Device->Media.LogicalBlocksPerPhysicalBlock = 1;
Device->Media.LowestAlignedLba = 1;
//
// Create BlockIo Protocol instance
//
Device->BlockIo.Revision = EFI_BLOCK_IO_PROTOCOL_REVISION2;
Device->BlockIo.Media = &Device->Media;
Device->BlockIo.Reset = NvmeBlockIoReset;
Device->BlockIo.ReadBlocks = NvmeBlockIoReadBlocks;
Device->BlockIo.WriteBlocks = NvmeBlockIoWriteBlocks;
Device->BlockIo.FlushBlocks = NvmeBlockIoFlushBlocks;
//
// Create DiskInfo Protocol instance
//
InitializeDiskInfo (Device);
//
// Create a Nvm Express Namespace Device Path Node
//
Status = Private->Passthru.BuildDevicePath (
&Private->Passthru,
Device->NamespaceId,
Device->NamespaceUuid,
&NewDevicePathNode
);
if (EFI_ERROR(Status)) {
goto Exit;
}
//
// Append the SSD node to the controller's device path
//
DevicePath = AppendDevicePathNode (ParentDevicePath, NewDevicePathNode);
if (DevicePath == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
DeviceHandle = NULL;
RemainingDevicePath = DevicePath;
Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &DeviceHandle);
if (!EFI_ERROR (Status) && (DeviceHandle != NULL) && IsDevicePathEnd(RemainingDevicePath)) {
Status = EFI_ALREADY_STARTED;
FreePool (DevicePath);
goto Exit;
}
Device->DevicePath = DevicePath;
//
// Make sure the handle is NULL so we create a new handle
//
Device->DeviceHandle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&Device->DeviceHandle,
&gEfiDevicePathProtocolGuid,
Device->DevicePath,
&gEfiBlockIoProtocolGuid,
&Device->BlockIo,
&gEfiDiskInfoProtocolGuid,
&Device->DiskInfo,
NULL
);
if(EFI_ERROR(Status)) {
goto Exit;
}
gBS->OpenProtocol (
Private->ControllerHandle,
&gEfiPciIoProtocolGuid,
(VOID **) &Private->PciIo,
Private->DriverBindingHandle,
Device->DeviceHandle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
//
// Build controller name for Component Name (2) protocol.
//
UnicodeSPrintAsciiFormat (Device->ModelName, sizeof (Device->ModelName), "%a-%a-%x", Private->ControllerData->Sn, Private->ControllerData->Mn, NamespaceData->Eui64);
AddUnicodeString2 (
"eng",
gNvmExpressComponentName.SupportedLanguages,
&Device->ControllerNameTable,
Device->ModelName,
TRUE
);
AddUnicodeString2 (
"en",
gNvmExpressComponentName2.SupportedLanguages,
&Device->ControllerNameTable,
Device->ModelName,
FALSE
);
}
Exit:
if(NamespaceData != NULL) {
FreePool (NamespaceData);
}
if(EFI_ERROR(Status) && (Device != NULL) && (Device->DevicePath != NULL)) {
FreePool (Device->DevicePath);
}
if(EFI_ERROR(Status) && (Device != NULL)) {
FreePool (Device);
}
return Status;
}
/**
Discover all Nvm Express device namespaces, and create child handles for them with BlockIo
and DiskInfo protocol instances.
@param[in] Private The pointer to the NVME_CONTROLLER_PRIVATE_DATA data structure.
@retval EFI_SUCCESS All the namespaces in the device are successfully enumerated.
@return Others Some error occurs when enumerating the namespaces.
**/
EFI_STATUS
DiscoverAllNamespaces (
IN NVME_CONTROLLER_PRIVATE_DATA *Private
)
{
EFI_STATUS Status;
UINT32 NamespaceId;
UINT64 NamespaceUuid;
NVM_EXPRESS_PASS_THRU_PROTOCOL *Passthru;
NamespaceId = 0xFFFFFFFF;
NamespaceUuid = 0;
Passthru = &Private->Passthru;
while (TRUE) {
Status = Passthru->GetNextNamespace (
Passthru,
(UINT32 *)&NamespaceId,
(UINT64 *)&NamespaceUuid
);
if (EFI_ERROR (Status)) {
break;
}
Status = EnumerateNvmeDevNamespace (
Private,
NamespaceId,
NamespaceUuid
);
if (EFI_ERROR(Status)) {
continue;
}
}
return EFI_SUCCESS;
}
/**
Unregisters a Nvm Express device namespace.
This function removes the protocols installed on the controller handle and
frees the resources allocated for the namespace.
@param This The pointer to EFI_DRIVER_BINDING_PROTOCOL instance.
@param Controller The controller handle of the namespace.
@param Handle The child handle.
@retval EFI_SUCCESS The namespace is successfully unregistered.
@return Others Some error occurs when unregistering the namespace.
**/
EFI_STATUS
UnregisterNvmeNamespace (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
NVME_DEVICE_PRIVATE_DATA *Device;
BlockIo = NULL;
Status = gBS->OpenProtocol (
Handle,
&gEfiBlockIoProtocolGuid,
(VOID **) &BlockIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
Device = NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO (BlockIo);
//
// Close the child handle
//
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Handle
);
//
// The Nvm Express driver installs the BlockIo and DiskInfo in the DriverBindingStart().
// Here should uninstall both of them.
//
Status = gBS->UninstallMultipleProtocolInterfaces (
Handle,
&gEfiDevicePathProtocolGuid,
Device->DevicePath,
&gEfiBlockIoProtocolGuid,
&Device->BlockIo,
&gEfiDiskInfoProtocolGuid,
&Device->DiskInfo,
NULL
);
if (EFI_ERROR (Status)) {
gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
return Status;
}
if(Device->DevicePath != NULL) {
FreePool (Device->DevicePath);
}
if (Device->ControllerNameTable != NULL) {
FreeUnicodeStringTable (Device->ControllerNameTable);
}
return EFI_SUCCESS;
}
/**
Tests to see if this driver supports a given controller. If a child device is provided,
it further tests to see if this driver supports creating a handle for the specified child device.
This function checks to see if the driver specified by This supports the device specified by
ControllerHandle. Drivers will typically use the device path attached to
ControllerHandle and/or the services from the bus I/O abstraction attached to
ControllerHandle to determine if the driver supports ControllerHandle. This function
may be called many times during platform initialization. In order to reduce boot times, the tests
performed by this function must be very small, and take as little time as possible to execute. This
function must not change the state of any hardware devices, and this function must be aware that the
device specified by ControllerHandle may already be managed by the same driver or a
different driver. This function must match its calls to AllocatePages() with FreePages(),
AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
Since ControllerHandle may have been previously started by the same driver, if a protocol is
already in the opened state, then it must not be closed with CloseProtocol(). This is required
to guarantee the state of ControllerHandle is not modified by this function.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle The handle of the controller to test. This handle
must support a protocol interface that supplies
an I/O abstraction to the driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
parameter is ignored by device drivers, and is optional for bus
drivers. For bus drivers, if this parameter is not NULL, then
the bus driver must determine if the bus controller specified
by ControllerHandle and the child controller specified
by RemainingDevicePath are both supported by this
bus driver.
@retval EFI_SUCCESS The device specified by ControllerHandle and
RemainingDevicePath is supported by the driver specified by This.
@retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
RemainingDevicePath is already being managed by the driver
specified by This.
@retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
RemainingDevicePath is already being managed by a different
driver or an application that requires exclusive access.
Currently not implemented.
@retval EFI_UNSUPPORTED The device specified by ControllerHandle and
RemainingDevicePath is not supported by the driver specified by This.
**/
EFI_STATUS
EFIAPI
NvmExpressDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_DEV_PATH_PTR DevicePathNode;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_PCI_IO_PROTOCOL *PciIo;
UINT8 ClassCode[3];
//
// Check whether device path is valid
//
if (RemainingDevicePath != NULL) {
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, go on checking other conditions
//
if (!IsDevicePathEnd (RemainingDevicePath)) {
//
// If RemainingDevicePath isn't the End of Device Path Node,
// check its validation
//
DevicePathNode.DevPath = RemainingDevicePath;
if ((DevicePathNode.DevPath->Type != MESSAGING_DEVICE_PATH) ||
(DevicePathNode.DevPath->SubType != MSG_NVME_NAMESPACE_DP) ||
DevicePathNodeLength(DevicePathNode.DevPath) != sizeof(NVME_NAMESPACE_DEVICE_PATH)) {
return EFI_UNSUPPORTED;
}
}
}
//
// Open the EFI Device Path protocol needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close protocol, don't use device path protocol in the Support() function
//
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
//
// Attempt to Open PCI I/O Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Now further check the PCI header: Base class (offset 0x0B) and Sub Class (offset 0x0A).
// This controller should be a Nvm Express controller.
//
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
PCI_CLASSCODE_OFFSET,
sizeof (ClassCode),
ClassCode
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Examine Nvm Express controller PCI Configuration table fields
//
if ((ClassCode[0] != PCI_IF_NVMHCI) || (ClassCode[1] != PCI_CLASS_MASS_STORAGE_NVM) || (ClassCode[2] != PCI_CLASS_MASS_STORAGE)) {
Status = EFI_UNSUPPORTED;
}
Done:
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
/**
Starts a device controller or a bus controller.
The Start() function is designed to be invoked from the EFI boot service ConnectController().
As a result, much of the error checking on the parameters to Start() has been moved into this
common boot service. It is legal to call Start() from other locations,
but the following calling restrictions must be followed or the system behavior will not be deterministic.
1. ControllerHandle must be a valid EFI_HANDLE.
2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
EFI_DEVICE_PATH_PROTOCOL.
3. Prior to calling Start(), the Supported() function for the driver specified by This must
have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle The handle of the controller to start. This handle
must support a protocol interface that supplies
an I/O abstraction to the driver.
@param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
parameter is ignored by device drivers, and is optional for bus
drivers. For a bus driver, if this parameter is NULL, then handles
for all the children of Controller are created by this driver.
If this parameter is not NULL and the first Device Path Node is
not the End of Device Path Node, then only the handle for the
child device specified by the first Device Path Node of
RemainingDevicePath is created by this driver.
If the first Device Path Node of RemainingDevicePath is
the End of Device Path Node, no child handle is created by this
driver.
@retval EFI_SUCCESS The device was started.
@retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
@retval Others The driver failded to start the device.
**/
EFI_STATUS
EFIAPI
NvmExpressDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
NVME_CONTROLLER_PRIVATE_DATA *Private;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
UINT32 NamespaceId;
UINT64 NamespaceUuid;
EFI_PHYSICAL_ADDRESS MappedAddr;
UINTN Bytes;
DEBUG ((EFI_D_INFO, "NvmExpressDriverBindingStart: start\n"));
Private = NULL;
ParentDevicePath = NULL;
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if ((EFI_ERROR (Status)) && (Status != EFI_ALREADY_STARTED)) {
return Status;
}
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
return Status;
}
//
// Check EFI_ALREADY_STARTED to reuse the original NVME_CONTROLLER_PRIVATE_DATA.
//
if (Status != EFI_ALREADY_STARTED) {
Private = AllocateZeroPool (sizeof (NVME_CONTROLLER_PRIVATE_DATA));
if (Private == NULL) {
DEBUG ((EFI_D_ERROR, "NvmExpressDriverBindingStart: allocating pool for Nvme Private Data failed!\n"));
Status = EFI_OUT_OF_RESOURCES;
goto Exit2;
}
//
// 4 x 4kB aligned buffers will be carved out of this buffer.
// 1st 4kB boundary is the start of the admin submission queue.
// 2nd 4kB boundary is the start of the admin completion queue.
// 3rd 4kB boundary is the start of I/O submission queue #1.
// 4th 4kB boundary is the start of I/O completion queue #1.
//
// Allocate 4 pages of memory, then map it for bus master read and write.
//
Status = PciIo->AllocateBuffer (
PciIo,
AllocateAnyPages,
EfiBootServicesData,
6,
(VOID**)&Private->Buffer,
0
);
if (EFI_ERROR (Status)) {
goto Exit2;
}
Bytes = EFI_PAGES_TO_SIZE (4);
Status = PciIo->Map (
PciIo,
EfiPciIoOperationBusMasterCommonBuffer,
Private->Buffer,
&Bytes,
&MappedAddr,
&Private->Mapping
);
if (EFI_ERROR (Status) || (Bytes != EFI_PAGES_TO_SIZE (4))) {
goto Exit2;
}
Private->BufferPciAddr = (UINT8 *)(UINTN)MappedAddr;
ZeroMem (Private->Buffer, EFI_PAGES_TO_SIZE (4));
Private->Signature = NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE;
Private->ControllerHandle = Controller;
Private->ImageHandle = This->DriverBindingHandle;
Private->DriverBindingHandle = This->DriverBindingHandle;
Private->PciIo = PciIo;
Private->ParentDevicePath = ParentDevicePath;
Private->Passthru.Mode = &Private->PassThruMode;
Private->Passthru.PassThru = NvmExpressPassThru;
Private->Passthru.GetNextNamespace = NvmExpressGetNextNamespace;
Private->Passthru.BuildDevicePath = NvmExpressBuildDevicePath;
Private->Passthru.GetNamespace = NvmExpressGetNamespace;
Private->PassThruMode.Attributes = NVM_EXPRESS_PASS_THRU_ATTRIBUTES_PHYSICAL;
Status = NvmeControllerInit (Private);
if (EFI_ERROR(Status)) {
goto Exit2;
}
Status = gBS->InstallMultipleProtocolInterfaces (
&Controller,
&gEfiCallerIdGuid,
Private,
NULL
);
if (EFI_ERROR (Status)) {
goto Exit2;
}
} else {
Status = gBS->OpenProtocol (
Controller,
&gEfiCallerIdGuid,
(VOID **) &Private,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
Private = NULL;
goto Exit1;
}
}
if (RemainingDevicePath == NULL) {
//
// Enumerate all NVME namespaces in the controller
//
Status = DiscoverAllNamespaces (
Private
);
} else if (!IsDevicePathEnd (RemainingDevicePath)) {
//
// Enumerate the specified NVME namespace
//
Status = Private->Passthru.GetNamespace (
&Private->Passthru,
RemainingDevicePath,
&NamespaceId,
&NamespaceUuid
);
if (!EFI_ERROR (Status)) {
Status = EnumerateNvmeDevNamespace (
Private,
NamespaceId,
NamespaceUuid
);
}
}
DEBUG ((EFI_D_INFO, "NvmExpressDriverBindingStart: end successfully\n"));
return EFI_SUCCESS;
Exit1:
gBS->UninstallMultipleProtocolInterfaces (
Controller,
&gEfiCallerIdGuid,
Private,
NULL
);
Exit2:
if ((Private != NULL) && (Private->Mapping != NULL)) {
PciIo->Unmap (PciIo, Private->Mapping);
}
if ((Private != NULL) && (Private->Buffer != NULL)) {
PciIo->FreeBuffer (PciIo, 4, Private->Buffer);
}
if (Private != NULL) {
FreePool (Private);
}
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
DEBUG ((EFI_D_INFO, "NvmExpressDriverBindingStart: end with %r\n", Status));
return Status;
}
/**
Stops a device controller or a bus controller.
The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
As a result, much of the error checking on the parameters to Stop() has been moved
into this common boot service. It is legal to call Stop() from other locations,
but the following calling restrictions must be followed or the system behavior will not be deterministic.
1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
same driver's Start() function.
2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
EFI_HANDLE. In addition, all of these handles must have been created in this driver's
Start() function, and the Start() function must have called OpenProtocol() on
ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param[in] ControllerHandle A handle to the device being stopped. The handle must
support a bus specific I/O protocol for the driver
to use to stop the device.
@param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
@param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
if NumberOfChildren is 0.
@retval EFI_SUCCESS The device was stopped.
@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
**/
EFI_STATUS
EFIAPI
NvmExpressDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
BOOLEAN AllChildrenStopped;
UINTN Index;
NVME_CONTROLLER_PRIVATE_DATA *Private;
if (NumberOfChildren == 0) {
Status = gBS->OpenProtocol (
Controller,
&gEfiCallerIdGuid,
(VOID **) &Private,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
gBS->UninstallMultipleProtocolInterfaces (
Controller,
&gEfiCallerIdGuid,
Private,
NULL
);
if (Private->Mapping != NULL) {
Private->PciIo->Unmap (Private->PciIo, Private->Mapping);
}
if (Private->Buffer != NULL) {
Private->PciIo->FreeBuffer (Private->PciIo, 4, Private->Buffer);
}
FreePool (Private->ControllerData);
FreePool (Private);
}
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_SUCCESS;
}
AllChildrenStopped = TRUE;
for (Index = 0; Index < NumberOfChildren; Index++) {
Status = UnregisterNvmeNamespace (This, Controller, ChildHandleBuffer[Index]);
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
/**
This is the unload handle for the NVM Express driver.
Disconnect the driver specified by ImageHandle from the NVMe device in the handle database.
Uninstall all the protocols installed in the driver.
@param[in] ImageHandle The drivers' driver image.
@retval EFI_SUCCESS The image is unloaded.
@retval Others Failed to unload the image.
**/
EFI_STATUS
EFIAPI
NvmExpressUnload (
IN EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
EFI_HANDLE *DeviceHandleBuffer;
UINTN DeviceHandleCount;
UINTN Index;
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
EFI_COMPONENT_NAME_PROTOCOL *ComponentName;
EFI_COMPONENT_NAME2_PROTOCOL *ComponentName2;
//
// Get the list of all the handles in the handle database.
// If there is an error getting the list, then the unload
// operation fails.
//
Status = gBS->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&DeviceHandleCount,
&DeviceHandleBuffer
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Disconnect the driver specified by ImageHandle from all
// the devices in the handle database.
//
for (Index = 0; Index < DeviceHandleCount; Index++) {
Status = gBS->DisconnectController (
DeviceHandleBuffer[Index],
ImageHandle,
NULL
);
}
//
// Uninstall all the protocols installed in the driver entry point
//
for (Index = 0; Index < DeviceHandleCount; Index++) {
Status = gBS->HandleProtocol (
DeviceHandleBuffer[Index],
&gEfiDriverBindingProtocolGuid,
(VOID **) &DriverBinding
);
if (EFI_ERROR (Status)) {
continue;
}
if (DriverBinding->ImageHandle != ImageHandle) {
continue;
}
gBS->UninstallProtocolInterface (
ImageHandle,
&gEfiDriverBindingProtocolGuid,
DriverBinding
);
Status = gBS->HandleProtocol (
DeviceHandleBuffer[Index],
&gEfiComponentNameProtocolGuid,
(VOID **) &ComponentName
);
if (!EFI_ERROR (Status)) {
gBS->UninstallProtocolInterface (
ImageHandle,
&gEfiComponentNameProtocolGuid,
ComponentName
);
}
Status = gBS->HandleProtocol (
DeviceHandleBuffer[Index],
&gEfiComponentName2ProtocolGuid,
(VOID **) &ComponentName2
);
if (!EFI_ERROR (Status)) {
gBS->UninstallProtocolInterface (
ImageHandle,
&gEfiComponentName2ProtocolGuid,
ComponentName2
);
}
}
//
// Free the buffer containing the list of handles from the handle database
//
if (DeviceHandleBuffer != NULL) {
gBS->FreePool (DeviceHandleBuffer);
}
return EFI_SUCCESS;
}
/**
The entry point for Nvm Express driver, used to install Nvm Express driver on the ImageHandle.
@param ImageHandle The firmware allocated handle for this driver image.
@param SystemTable Pointer to the EFI system table.
@retval EFI_SUCCESS Driver loaded.
@retval other Driver not loaded.
**/
EFI_STATUS
EFIAPI
NvmExpressDriverEntry (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gNvmExpressDriverBinding,
ImageHandle,
&gNvmExpressComponentName,
&gNvmExpressComponentName2
);
ASSERT_EFI_ERROR (Status);
//
// Install EFI Driver Supported EFI Version Protocol required for
// EFI drivers that are on PCI and other plug in cards.
//
gNvmExpressDriverSupportedEfiVersion.FirmwareVersion = 0x00020028;
Status = gBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gEfiDriverSupportedEfiVersionProtocolGuid,
&gNvmExpressDriverSupportedEfiVersion,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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