[mirror_edk2.git] / MdeModulePkg / Bus / Pci / NvmExpressDxe / NvmExpress.h

/** @file\r
  NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows\r
  NVM Express specification.\r
\r
  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>\r
  Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#ifndef _EFI_NVM_EXPRESS_H_\r
#define _EFI_NVM_EXPRESS_H_\r
\r
#include <Uefi.h>\r
\r
#include <IndustryStandard/Pci.h>\r
#include <IndustryStandard/Nvme.h>\r
\r
#include <Protocol/ComponentName.h>\r
#include <Protocol/ComponentName2.h>\r
#include <Protocol/DriverBinding.h>\r
#include <Protocol/LoadedImage.h>\r
#include <Protocol/DevicePath.h>\r
#include <Protocol/PciIo.h>\r
#include <Protocol/NvmExpressPassthru.h>\r
#include <Protocol/BlockIo.h>\r
#include <Protocol/BlockIo2.h>\r
#include <Protocol/DiskInfo.h>\r
#include <Protocol/DriverSupportedEfiVersion.h>\r
#include <Protocol/StorageSecurityCommand.h>\r
#include <Protocol/ResetNotification.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PrintLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/DevicePathLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/ReportStatusCodeLib.h>\r
\r
typedef struct _NVME_CONTROLLER_PRIVATE_DATA  NVME_CONTROLLER_PRIVATE_DATA;\r
typedef struct _NVME_DEVICE_PRIVATE_DATA      NVME_DEVICE_PRIVATE_DATA;\r
\r
#include "NvmExpressBlockIo.h"\r
#include "NvmExpressDiskInfo.h"\r
#include "NvmExpressHci.h"\r
\r
extern EFI_DRIVER_BINDING_PROTOCOL                gNvmExpressDriverBinding;\r
extern EFI_COMPONENT_NAME_PROTOCOL                gNvmExpressComponentName;\r
extern EFI_COMPONENT_NAME2_PROTOCOL               gNvmExpressComponentName2;\r
extern EFI_DRIVER_SUPPORTED_EFI_VERSION_PROTOCOL  gNvmExpressDriverSupportedEfiVersion;\r
\r
#define PCI_CLASS_MASS_STORAGE_NVM  0x08                // mass storage sub-class non-volatile memory.\r
#define PCI_IF_NVMHCI               0x02                // mass storage programming interface NVMHCI.\r
\r
#define NVME_ASQ_SIZE  1                                // Number of admin submission queue entries, which is 0-based\r
#define NVME_ACQ_SIZE  1                                // Number of admin completion queue entries, which is 0-based\r
\r
#define NVME_CSQ_SIZE  1                                // Number of I/O submission queue entries, which is 0-based\r
#define NVME_CCQ_SIZE  1                                // Number of I/O completion queue entries, which is 0-based\r
\r
//\r
// Number of asynchronous I/O submission queue entries, which is 0-based.\r
// The asynchronous I/O submission queue size is 4kB in total.\r
//\r
#define NVME_ASYNC_CSQ_SIZE  63\r
//\r
// Number of asynchronous I/O completion queue entries, which is 0-based.\r
// The asynchronous I/O completion queue size is 4kB in total.\r
//\r
#define NVME_ASYNC_CCQ_SIZE  255\r
\r
#define NVME_MAX_QUEUES  3                              // Number of queues supported by the driver\r
\r
#define NVME_CONTROLLER_ID  0\r
\r
//\r
// Time out value for Nvme transaction execution\r
//\r
#define NVME_GENERIC_TIMEOUT  EFI_TIMER_PERIOD_SECONDS (5)\r
\r
//\r
// Nvme async transfer timer interval, set by experience.\r
//\r
#define NVME_HC_ASYNC_TIMER  EFI_TIMER_PERIOD_MILLISECONDS (1)\r
\r
//\r
// Unique signature for private data structure.\r
//\r
#define NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE  SIGNATURE_32 ('N','V','M','E')\r
\r
//\r
// Nvme private data structure.\r
//\r
struct _NVME_CONTROLLER_PRIVATE_DATA {\r
  UINT32                                Signature;\r
\r
  EFI_HANDLE                            ControllerHandle;\r
  EFI_HANDLE                            ImageHandle;\r
  EFI_HANDLE                            DriverBindingHandle;\r
\r
  EFI_PCI_IO_PROTOCOL                   *PciIo;\r
  UINT64                                PciAttributes;\r
\r
  EFI_DEVICE_PATH_PROTOCOL              *ParentDevicePath;\r
\r
  EFI_NVM_EXPRESS_PASS_THRU_MODE        PassThruMode;\r
  EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL    Passthru;\r
\r
  //\r
  // pointer to identify controller data\r
  //\r
  NVME_ADMIN_CONTROLLER_DATA            *ControllerData;\r
\r
  //\r
  // 6 x 4kB aligned buffers will be carved out of this buffer.\r
  // 1st 4kB boundary is the start of the admin submission queue.\r
  // 2nd 4kB boundary is the start of the admin completion queue.\r
  // 3rd 4kB boundary is the start of I/O submission queue #1.\r
  // 4th 4kB boundary is the start of I/O completion queue #1.\r
  // 5th 4kB boundary is the start of I/O submission queue #2.\r
  // 6th 4kB boundary is the start of I/O completion queue #2.\r
  //\r
  UINT8          *Buffer;\r
  UINT8          *BufferPciAddr;\r
\r
  //\r
  // Pointers to 4kB aligned submission & completion queues.\r
  //\r
  NVME_SQ        *SqBuffer[NVME_MAX_QUEUES];\r
  NVME_CQ        *CqBuffer[NVME_MAX_QUEUES];\r
  NVME_SQ        *SqBufferPciAddr[NVME_MAX_QUEUES];\r
  NVME_CQ        *CqBufferPciAddr[NVME_MAX_QUEUES];\r
\r
  //\r
  // Submission and completion queue indices.\r
  //\r
  NVME_SQTDBL    SqTdbl[NVME_MAX_QUEUES];\r
  NVME_CQHDBL    CqHdbl[NVME_MAX_QUEUES];\r
  UINT16         AsyncSqHead;\r
\r
  //\r
  // Flag to indicate internal IO queue creation.\r
  //\r
  BOOLEAN        CreateIoQueue;\r
\r
  UINT8          Pt[NVME_MAX_QUEUES];\r
  UINT16         Cid[NVME_MAX_QUEUES];\r
\r
  //\r
  // Nvme controller capabilities\r
  //\r
  NVME_CAP       Cap;\r
\r
  VOID           *Mapping;\r
\r
  //\r
  // For Non-blocking operations.\r
  //\r
  EFI_EVENT      TimerEvent;\r
  LIST_ENTRY     AsyncPassThruQueue;\r
  LIST_ENTRY     UnsubmittedSubtasks;\r
};\r
\r
#define NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU(a) \\r
  CR (a, \\r
      NVME_CONTROLLER_PRIVATE_DATA, \\r
      Passthru, \\r
      NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE \\r
      )\r
\r
//\r
// Unique signature for private data structure.\r
//\r
#define NVME_DEVICE_PRIVATE_DATA_SIGNATURE  SIGNATURE_32 ('X','S','S','D')\r
\r
//\r
// Nvme device private data structure\r
//\r
struct _NVME_DEVICE_PRIVATE_DATA {\r
  UINT32                                   Signature;\r
\r
  EFI_HANDLE                               DeviceHandle;\r
  EFI_HANDLE                               ControllerHandle;\r
  EFI_HANDLE                               DriverBindingHandle;\r
\r
  EFI_DEVICE_PATH_PROTOCOL                 *DevicePath;\r
\r
  EFI_UNICODE_STRING_TABLE                 *ControllerNameTable;\r
\r
  UINT32                                   NamespaceId;\r
  UINT64                                   NamespaceUuid;\r
\r
  EFI_BLOCK_IO_MEDIA                       Media;\r
  EFI_BLOCK_IO_PROTOCOL                    BlockIo;\r
  EFI_BLOCK_IO2_PROTOCOL                   BlockIo2;\r
  EFI_DISK_INFO_PROTOCOL                   DiskInfo;\r
  EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    StorageSecurity;\r
\r
  LIST_ENTRY                               AsyncQueue;\r
\r
  EFI_LBA                                  NumBlocks;\r
\r
  CHAR16                                   ModelName[80];\r
  NVME_ADMIN_NAMESPACE_DATA                NamespaceData;\r
\r
  NVME_CONTROLLER_PRIVATE_DATA             *Controller;\r
};\r
\r
//\r
// Statments to retrieve the private data from produced protocols.\r
//\r
#define NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO(a) \\r
  CR (a, \\r
      NVME_DEVICE_PRIVATE_DATA, \\r
      BlockIo, \\r
      NVME_DEVICE_PRIVATE_DATA_SIGNATURE \\r
      )\r
\r
#define NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO2(a) \\r
  CR (a, \\r
      NVME_DEVICE_PRIVATE_DATA, \\r
      BlockIo2, \\r
      NVME_DEVICE_PRIVATE_DATA_SIGNATURE \\r
      )\r
\r
#define NVME_DEVICE_PRIVATE_DATA_FROM_DISK_INFO(a) \\r
  CR (a, \\r
      NVME_DEVICE_PRIVATE_DATA, \\r
      DiskInfo, \\r
      NVME_DEVICE_PRIVATE_DATA_SIGNATURE \\r
      )\r
\r
#define NVME_DEVICE_PRIVATE_DATA_FROM_STORAGE_SECURITY(a) \\r
  CR (a,                                                 \\r
      NVME_DEVICE_PRIVATE_DATA,                          \\r
      StorageSecurity,                                   \\r
      NVME_DEVICE_PRIVATE_DATA_SIGNATURE                 \\r
      )\r
\r
//\r
// Nvme block I/O 2 request.\r
//\r
#define NVME_BLKIO2_REQUEST_SIGNATURE  SIGNATURE_32 ('N', 'B', '2', 'R')\r
\r
typedef struct {\r
  UINT32                 Signature;\r
  LIST_ENTRY             Link;\r
\r
  EFI_BLOCK_IO2_TOKEN    *Token;\r
  UINTN                  UnsubmittedSubtaskNum;\r
  BOOLEAN                LastSubtaskSubmitted;\r
  //\r
  // The queue for Nvme read/write sub-tasks of a BlockIo2 request.\r
  //\r
  LIST_ENTRY             SubtasksQueue;\r
} NVME_BLKIO2_REQUEST;\r
\r
#define NVME_BLKIO2_REQUEST_FROM_LINK(a) \\r
  CR (a, NVME_BLKIO2_REQUEST, Link, NVME_BLKIO2_REQUEST_SIGNATURE)\r
\r
#define NVME_BLKIO2_SUBTASK_SIGNATURE  SIGNATURE_32 ('N', 'B', '2', 'S')\r
\r
typedef struct {\r
  UINT32                                      Signature;\r
  LIST_ENTRY                                  Link;\r
\r
  BOOLEAN                                     IsLast;\r
  UINT32                                      NamespaceId;\r
  EFI_EVENT                                   Event;\r
  EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET    *CommandPacket;\r
  //\r
  // The BlockIo2 request this subtask belongs to\r
  //\r
  NVME_BLKIO2_REQUEST                         *BlockIo2Request;\r
} NVME_BLKIO2_SUBTASK;\r
\r
#define NVME_BLKIO2_SUBTASK_FROM_LINK(a) \\r
  CR (a, NVME_BLKIO2_SUBTASK, Link, NVME_BLKIO2_SUBTASK_SIGNATURE)\r
\r
//\r
// Nvme asynchronous passthru request.\r
//\r
#define NVME_PASS_THRU_ASYNC_REQ_SIG  SIGNATURE_32 ('N', 'P', 'A', 'R')\r
\r
typedef struct {\r
  UINT32                                      Signature;\r
  LIST_ENTRY                                  Link;\r
\r
  EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET    *Packet;\r
  UINT16                                      CommandId;\r
  VOID                                        *MapPrpList;\r
  UINTN                                       PrpListNo;\r
  VOID                                        *PrpListHost;\r
  VOID                                        *MapData;\r
  VOID                                        *MapMeta;\r
  EFI_EVENT                                   CallerEvent;\r
} NVME_PASS_THRU_ASYNC_REQ;\r
\r
#define NVME_PASS_THRU_ASYNC_REQ_FROM_THIS(a) \\r
  CR (a,                                                 \\r
      NVME_PASS_THRU_ASYNC_REQ,                          \\r
      Link,                                              \\r
      NVME_PASS_THRU_ASYNC_REQ_SIG                       \\r
      )\r
\r
/**\r
  Retrieves a Unicode string that is the user readable name of the driver.\r
\r
  This function retrieves the user readable name of a driver in the form of a\r
  Unicode string. If the driver specified by This has a user readable name in\r
  the language specified by Language, then a pointer to the driver name is\r
  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified\r
  by This does not support the language specified by Language,\r
  then EFI_UNSUPPORTED is returned.\r
\r
  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r
                                EFI_COMPONENT_NAME_PROTOCOL instance.\r
\r
  @param  Language[in]          A pointer to a Null-terminated ASCII string\r
                                array indicating the language. This is the\r
                                language of the driver name that the caller is\r
                                requesting, and it must match one of the\r
                                languages specified in SupportedLanguages. The\r
                                number of languages supported by a driver is up\r
                                to the driver writer. Language is specified\r
                                in RFC 4646 or ISO 639-2 language code format.\r
\r
  @param  DriverName[out]       A pointer to the Unicode string to return.\r
                                This Unicode string is the name of the\r
                                driver specified by This in the language\r
                                specified by Language.\r
\r
  @retval EFI_SUCCESS           The Unicode string for the Driver specified by\r
                                This and the language specified by Language was\r
                                returned in DriverName.\r
\r
  @retval EFI_INVALID_PARAMETER Language is NULL.\r
\r
  @retval EFI_INVALID_PARAMETER DriverName is NULL.\r
\r
  @retval EFI_UNSUPPORTED       The driver specified by This does not support\r
                                the language specified by Language.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressComponentNameGetDriverName (\r
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,\r
  IN  CHAR8                        *Language,\r
  OUT CHAR16                       **DriverName\r
  );\r
\r
/**\r
  Retrieves a Unicode string that is the user readable name of the controller\r
  that is being managed by a driver.\r
\r
  This function retrieves the user readable name of the controller specified by\r
  ControllerHandle and ChildHandle in the form of a Unicode string. If the\r
  driver specified by This has a user readable name in the language specified by\r
  Language, then a pointer to the controller name is returned in ControllerName,\r
  and EFI_SUCCESS is returned.  If the driver specified by This is not currently\r
  managing the controller specified by ControllerHandle and ChildHandle,\r
  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not\r
  support the language specified by Language, then EFI_UNSUPPORTED is returned.\r
\r
  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r
                                EFI_COMPONENT_NAME_PROTOCOL instance.\r
\r
  @param  ControllerHandle[in]  The handle of a controller that the driver\r
                                specified by This is managing.  This handle\r
                                specifies the controller whose name is to be\r
                                returned.\r
\r
  @param  ChildHandle[in]       The handle of the child controller to retrieve\r
                                the name of.  This is an optional parameter that\r
                                may be NULL.  It will be NULL for device\r
                                drivers.  It will also be NULL for a bus drivers\r
                                that wish to retrieve the name of the bus\r
                                controller.  It will not be NULL for a bus\r
                                driver that wishes to retrieve the name of a\r
                                child controller.\r
\r
  @param  Language[in]          A pointer to a Null-terminated ASCII string\r
                                array indicating the language.  This is the\r
                                language of the driver name that the caller is\r
                                requesting, and it must match one of the\r
                                languages specified in SupportedLanguages. The\r
                                number of languages supported by a driver is up\r
                                to the driver writer. Language is specified in\r
                                RFC 4646 or ISO 639-2 language code format.\r
\r
  @param  ControllerName[out]   A pointer to the Unicode string to return.\r
                                This Unicode string is the name of the\r
                                controller specified by ControllerHandle and\r
                                ChildHandle in the language specified by\r
                                Language from the point of view of the driver\r
                                specified by This.\r
\r
  @retval EFI_SUCCESS           The Unicode string for the user readable name in\r
                                the language specified by Language for the\r
                                driver specified by This was returned in\r
                                DriverName.\r
\r
  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.\r
\r
  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid\r
                                EFI_HANDLE.\r
\r
  @retval EFI_INVALID_PARAMETER Language is NULL.\r
\r
  @retval EFI_INVALID_PARAMETER ControllerName is NULL.\r
\r
  @retval EFI_UNSUPPORTED       The driver specified by This is not currently\r
                                managing the controller specified by\r
                                ControllerHandle and ChildHandle.\r
\r
  @retval EFI_UNSUPPORTED       The driver specified by This does not support\r
                                the language specified by Language.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressComponentNameGetControllerName (\r
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   ControllerHandle,\r
  IN  EFI_HANDLE                   ChildHandle        OPTIONAL,\r
  IN  CHAR8                        *Language,\r
  OUT CHAR16                       **ControllerName\r
  );\r
\r
/**\r
  Tests to see if this driver supports a given controller. If a child device is provided,\r
  it further tests to see if this driver supports creating a handle for the specified child device.\r
\r
  This function checks to see if the driver specified by This supports the device specified by\r
  ControllerHandle. Drivers will typically use the device path attached to\r
  ControllerHandle and/or the services from the bus I/O abstraction attached to\r
  ControllerHandle to determine if the driver supports ControllerHandle. This function\r
  may be called many times during platform initialization. In order to reduce boot times, the tests\r
  performed by this function must be very small, and take as little time as possible to execute. This\r
  function must not change the state of any hardware devices, and this function must be aware that the\r
  device specified by ControllerHandle may already be managed by the same driver or a\r
  different driver. This function must match its calls to AllocatePages() with FreePages(),\r
  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().\r
  Since ControllerHandle may have been previously started by the same driver, if a protocol is\r
  already in the opened state, then it must not be closed with CloseProtocol(). This is required\r
  to guarantee the state of ControllerHandle is not modified by this function.\r
\r
  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle     The handle of the controller to test. This handle\r
                                   must support a protocol interface that supplies\r
                                   an I/O abstraction to the driver.\r
  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This\r
                                   parameter is ignored by device drivers, and is optional for bus\r
                                   drivers. For bus drivers, if this parameter is not NULL, then\r
                                   the bus driver must determine if the bus controller specified\r
                                   by ControllerHandle and the child controller specified\r
                                   by RemainingDevicePath are both supported by this\r
                                   bus driver.\r
\r
  @retval EFI_SUCCESS              The device specified by ControllerHandle and\r
                                   RemainingDevicePath is supported by the driver specified by This.\r
  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and\r
                                   RemainingDevicePath is already being managed by the driver\r
                                   specified by This.\r
  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and\r
                                   RemainingDevicePath is already being managed by a different\r
                                   driver or an application that requires exclusive access.\r
                                   Currently not implemented.\r
  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and\r
                                   RemainingDevicePath is not supported by the driver specified by This.\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressDriverBindingSupported (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   Controller,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  );\r
\r
/**\r
  Starts a device controller or a bus controller.\r
\r
  The Start() function is designed to be invoked from the EFI boot service ConnectController().\r
  As a result, much of the error checking on the parameters to Start() has been moved into this\r
  common boot service. It is legal to call Start() from other locations,\r
  but the following calling restrictions must be followed or the system behavior will not be deterministic.\r
  1. ControllerHandle must be a valid EFI_HANDLE.\r
  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned\r
     EFI_DEVICE_PATH_PROTOCOL.\r
  3. Prior to calling Start(), the Supported() function for the driver specified by This must\r
     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.\r
\r
  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle     The handle of the controller to start. This handle\r
                                   must support a protocol interface that supplies\r
                                   an I/O abstraction to the driver.\r
  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This\r
                                   parameter is ignored by device drivers, and is optional for bus\r
                                   drivers. For a bus driver, if this parameter is NULL, then handles\r
                                   for all the children of Controller are created by this driver.\r
                                   If this parameter is not NULL and the first Device Path Node is\r
                                   not the End of Device Path Node, then only the handle for the\r
                                   child device specified by the first Device Path Node of\r
                                   RemainingDevicePath is created by this driver.\r
                                   If the first Device Path Node of RemainingDevicePath is\r
                                   the End of Device Path Node, no child handle is created by this\r
                                   driver.\r
\r
  @retval EFI_SUCCESS              The device was started.\r
  @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.\r
  @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.\r
  @retval Others                   The driver failded to start the device.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressDriverBindingStart (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   Controller,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  );\r
\r
/**\r
  Stops a device controller or a bus controller.\r
\r
  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().\r
  As a result, much of the error checking on the parameters to Stop() has been moved\r
  into this common boot service. It is legal to call Stop() from other locations,\r
  but the following calling restrictions must be followed or the system behavior will not be deterministic.\r
  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this\r
     same driver's Start() function.\r
  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid\r
     EFI_HANDLE. In addition, all of these handles must have been created in this driver's\r
     Start() function, and the Start() function must have called OpenProtocol() on\r
     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.\r
\r
  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must\r
                                support a bus specific I/O protocol for the driver\r
                                to use to stop the device.\r
  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.\r
  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL\r
                                if NumberOfChildren is 0.\r
\r
  @retval EFI_SUCCESS           The device was stopped.\r
  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressDriverBindingStop (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   Controller,\r
  IN  UINTN                        NumberOfChildren,\r
  IN  EFI_HANDLE                   *ChildHandleBuffer\r
  );\r
\r
/**\r
  Sends an NVM Express Command Packet to an NVM Express controller or namespace. This function supports\r
  both blocking I/O and nonblocking I/O. The blocking I/O functionality is required, and the nonblocking\r
  I/O functionality is optional.\r
\r
  @param[in]     This                A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance.\r
  @param[in]     NamespaceId         Is a 32 bit Namespace ID to which the Express HCI command packet will be sent.\r
                                     A value of 0 denotes the NVM Express controller, a value of all 0FFh in the namespace\r
                                     ID specifies that the command packet should be sent to all valid namespaces.\r
  @param[in,out] Packet              A pointer to the NVM Express HCI Command Packet to send to the NVMe namespace specified\r
                                     by NamespaceId.\r
  @param[in]     Event               If nonblocking I/O is not supported then Event is ignored, and blocking I/O is performed.\r
                                     If Event is NULL, then blocking I/O is performed. If Event is not NULL and non blocking I/O\r
                                     is supported, then nonblocking I/O is performed, and Event will be signaled when the NVM\r
                                     Express Command Packet completes.\r
\r
  @retval EFI_SUCCESS                The NVM Express Command Packet was sent by the host. TransferLength bytes were transferred\r
                                     to, or from DataBuffer.\r
  @retval EFI_BAD_BUFFER_SIZE        The NVM Express Command Packet was not executed. The number of bytes that could be transferred\r
                                     is returned in TransferLength.\r
  @retval EFI_NOT_READY              The NVM Express Command Packet could not be sent because the controller is not ready. The caller\r
                                     may retry again later.\r
  @retval EFI_DEVICE_ERROR           A device error occurred while attempting to send the NVM Express Command Packet.\r
  @retval EFI_INVALID_PARAMETER      Namespace, or the contents of EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET are invalid. The NVM\r
                                     Express Command Packet was not sent, so no additional status information is available.\r
  @retval EFI_UNSUPPORTED            The command described by the NVM Express Command Packet is not supported by the host adapter.\r
                                     The NVM Express Command Packet was not sent, so no additional status information is available.\r
  @retval EFI_TIMEOUT                A timeout occurred while waiting for the NVM Express Command Packet to execute.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressPassThru (\r
  IN     EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL        *This,\r
  IN     UINT32                                    NamespaceId,\r
  IN OUT EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET  *Packet,\r
  IN     EFI_EVENT                                 Event OPTIONAL\r
  );\r
\r
/**\r
  Used to retrieve the next namespace ID for this NVM Express controller.\r
\r
  The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNextNamespace() function retrieves the next valid\r
  namespace ID on this NVM Express controller.\r
\r
  If on input the value pointed to by NamespaceId is 0xFFFFFFFF, then the first valid namespace\r
  ID defined on the NVM Express controller is returned in the location pointed to by NamespaceId\r
  and a status of EFI_SUCCESS is returned.\r
\r
  If on input the value pointed to by NamespaceId is an invalid namespace ID other than 0xFFFFFFFF,\r
  then EFI_INVALID_PARAMETER is returned.\r
\r
  If on input the value pointed to by NamespaceId is a valid namespace ID, then the next valid\r
  namespace ID on the NVM Express controller is returned in the location pointed to by NamespaceId,\r
  and EFI_SUCCESS is returned.\r
\r
  If the value pointed to by NamespaceId is the namespace ID of the last namespace on the NVM\r
  Express controller, then EFI_NOT_FOUND is returned.\r
\r
  @param[in]     This           A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance.\r
  @param[in,out] NamespaceId    On input, a pointer to a legal NamespaceId for an NVM Express\r
                                namespace present on the NVM Express controller. On output, a\r
                                pointer to the next NamespaceId of an NVM Express namespace on\r
                                an NVM Express controller. An input value of 0xFFFFFFFF retrieves\r
                                the first NamespaceId for an NVM Express namespace present on an\r
                                NVM Express controller.\r
\r
  @retval EFI_SUCCESS           The Namespace ID of the next Namespace was returned.\r
  @retval EFI_NOT_FOUND         There are no more namespaces defined on this controller.\r
  @retval EFI_INVALID_PARAMETER NamespaceId is an invalid value other than 0xFFFFFFFF.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressGetNextNamespace (\r
  IN     EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL  *This,\r
  IN OUT UINT32                              *NamespaceId\r
  );\r
\r
/**\r
  Used to translate a device path node to a namespace ID.\r
\r
  The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNamespace() function determines the namespace ID associated with the\r
  namespace described by DevicePath.\r
\r
  If DevicePath is a device path node type that the NVM Express Pass Thru driver supports, then the NVM Express\r
  Pass Thru driver will attempt to translate the contents DevicePath into a namespace ID.\r
\r
  If this translation is successful, then that namespace ID is returned in NamespaceId, and EFI_SUCCESS is returned\r
\r
  @param[in]  This                A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance.\r
  @param[in]  DevicePath          A pointer to the device path node that describes an NVM Express namespace on\r
                                  the NVM Express controller.\r
  @param[out] NamespaceId         The NVM Express namespace ID contained in the device path node.\r
\r
  @retval EFI_SUCCESS             DevicePath was successfully translated to NamespaceId.\r
  @retval EFI_INVALID_PARAMETER   If DevicePath or NamespaceId are NULL, then EFI_INVALID_PARAMETER is returned.\r
  @retval EFI_UNSUPPORTED         If DevicePath is not a device path node type that the NVM Express Pass Thru driver\r
                                  supports, then EFI_UNSUPPORTED is returned.\r
  @retval EFI_NOT_FOUND           If DevicePath is a device path node type that the NVM Express Pass Thru driver\r
                                  supports, but there is not a valid translation from DevicePath to a namespace ID,\r
                                  then EFI_NOT_FOUND is returned.\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressGetNamespace (\r
  IN     EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL  *This,\r
  IN     EFI_DEVICE_PATH_PROTOCOL            *DevicePath,\r
  OUT UINT32                                 *NamespaceId\r
  );\r
\r
/**\r
  Used to allocate and build a device path node for an NVM Express namespace on an NVM Express controller.\r
\r
  The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.BuildDevicePath() function allocates and builds a single device\r
  path node for the NVM Express namespace specified by NamespaceId.\r
\r
  If the NamespaceId is not valid, then EFI_NOT_FOUND is returned.\r
\r
  If DevicePath is NULL, then EFI_INVALID_PARAMETER is returned.\r
\r
  If there are not enough resources to allocate the device path node, then EFI_OUT_OF_RESOURCES is returned.\r
\r
  Otherwise, DevicePath is allocated with the boot service AllocatePool(), the contents of DevicePath are\r
  initialized to describe the NVM Express namespace specified by NamespaceId, and EFI_SUCCESS is returned.\r
\r
  @param[in]     This                A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance.\r
  @param[in]     NamespaceId         The NVM Express namespace ID  for which a device path node is to be\r
                                     allocated and built. Caller must set the NamespaceId to zero if the\r
                                     device path node will contain a valid UUID.\r
  @param[in,out] DevicePath          A pointer to a single device path node that describes the NVM Express\r
                                     namespace specified by NamespaceId. This function is responsible for\r
                                     allocating the buffer DevicePath with the boot service AllocatePool().\r
                                     It is the caller's responsibility to free DevicePath when the caller\r
                                     is finished with DevicePath.\r
  @retval EFI_SUCCESS                The device path node that describes the NVM Express namespace specified\r
                                     by NamespaceId was allocated and returned in DevicePath.\r
  @retval EFI_NOT_FOUND              The NamespaceId is not valid.\r
  @retval EFI_INVALID_PARAMETER      DevicePath is NULL.\r
  @retval EFI_OUT_OF_RESOURCES       There are not enough resources to allocate the DevicePath node.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
NvmExpressBuildDevicePath (\r
  IN     EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL  *This,\r
  IN     UINT32                              NamespaceId,\r
  IN OUT EFI_DEVICE_PATH_PROTOCOL            **DevicePath\r
  );\r
\r
/**\r
  Dump the execution status from a given completion queue entry.\r
\r
  @param[in]     Cq               A pointer to the NVME_CQ item.\r
\r
**/\r
VOID\r
NvmeDumpStatus (\r
  IN NVME_CQ  *Cq\r
  );\r
\r
/**\r
  Register the shutdown notification through the ResetNotification protocol.\r
\r
  Register the shutdown notification when mNvmeControllerNumber increased from 0 to 1.\r
**/\r
VOID\r
NvmeRegisterShutdownNotification (\r
  VOID\r
  );\r
\r
/**\r
  Unregister the shutdown notification through the ResetNotification protocol.\r
\r
  Unregister the shutdown notification when mNvmeControllerNumber decreased from 1 to 0.\r
**/\r
VOID\r
NvmeUnregisterShutdownNotification (\r
  VOID\r
  );\r
\r
#endif\r