NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows\r
NVM Express specification.\r
\r
- Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
\r
#include "NvmExpress.h"\r
\r
+#define NVME_SHUTDOWN_PROCESS_TIMEOUT 45\r
+\r
+//\r
+// The number of NVME controllers managed by this driver, used by\r
+// NvmeRegisterShutdownNotification() and NvmeUnregisterShutdownNotification().\r
+//\r
+UINTN mNvmeControllerNumber = 0;\r
+\r
/**\r
Read Nvm Express controller capability register.\r
\r
return Status;\r
}\r
\r
- DEBUG ((EFI_D_INFO, "Asq.Asqb: %lx\n", Asq->Asqb));\r
+ DEBUG ((EFI_D_INFO, "Asq: %lx\n", *Asq));\r
\r
return EFI_SUCCESS;\r
}\r
return Status;\r
}\r
\r
- DEBUG ((EFI_D_INFO, "Acq.Acqb: %lxh\n", Acq->Acqb));\r
+ DEBUG ((EFI_D_INFO, "Acq: %lxh\n", *Acq));\r
\r
return EFI_SUCCESS;\r
}\r
ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
\r
- Command.Cdw0.Opcode = NVME_ADMIN_IDENTIFY_OPC;\r
+ Command.Cdw0.Opcode = NVME_ADMIN_IDENTIFY_CMD;\r
//\r
// According to Nvm Express 1.1 spec Figure 38, When not used, the field shall be cleared to 0h.\r
// For the Identify command, the Namespace Identifier is only used for the Namespace data structure.\r
CommandPacket.NvmeCmd = &Command;\r
CommandPacket.NvmeCompletion = &Completion;\r
\r
- Command.Cdw0.Opcode = NVME_ADMIN_IDENTIFY_OPC;\r
+ Command.Cdw0.Opcode = NVME_ADMIN_IDENTIFY_CMD;\r
Command.Nsid = NamespaceId;\r
CommandPacket.TransferBuffer = Buffer;\r
CommandPacket.TransferLength = sizeof (NVME_ADMIN_NAMESPACE_DATA);\r
EFI_NVM_EXPRESS_COMPLETION Completion;\r
EFI_STATUS Status;\r
NVME_ADMIN_CRIOCQ CrIoCq;\r
+ UINT32 Index;\r
+ UINT16 QueueSize;\r
+\r
+ Status = EFI_SUCCESS;\r
+\r
+ for (Index = 1; Index < NVME_MAX_QUEUES; Index++) {\r
+ ZeroMem (&CommandPacket, sizeof(EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET));\r
+ ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
+ ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
+ ZeroMem (&CrIoCq, sizeof(NVME_ADMIN_CRIOCQ));\r
+\r
+ CommandPacket.NvmeCmd = &Command;\r
+ CommandPacket.NvmeCompletion = &Completion;\r
+\r
+ Command.Cdw0.Opcode = NVME_ADMIN_CRIOCQ_CMD;\r
+ CommandPacket.TransferBuffer = Private->CqBufferPciAddr[Index];\r
+ CommandPacket.TransferLength = EFI_PAGE_SIZE;\r
+ CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;\r
+ CommandPacket.QueueType = NVME_ADMIN_QUEUE;\r
+\r
+ if (Index == 1) {\r
+ QueueSize = NVME_CCQ_SIZE;\r
+ } else {\r
+ if (Private->Cap.Mqes > NVME_ASYNC_CCQ_SIZE) {\r
+ QueueSize = NVME_ASYNC_CCQ_SIZE;\r
+ } else {\r
+ QueueSize = Private->Cap.Mqes;\r
+ }\r
+ }\r
\r
- ZeroMem (&CommandPacket, sizeof(EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET));\r
- ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
- ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
- ZeroMem (&CrIoCq, sizeof(NVME_ADMIN_CRIOCQ));\r
-\r
- CommandPacket.NvmeCmd = &Command;\r
- CommandPacket.NvmeCompletion = &Completion;\r
-\r
- Command.Cdw0.Opcode = NVME_ADMIN_CRIOCQ_OPC;\r
- CommandPacket.TransferBuffer = Private->CqBufferPciAddr[1];\r
- CommandPacket.TransferLength = EFI_PAGE_SIZE;\r
- CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;\r
- CommandPacket.QueueType = NVME_ADMIN_QUEUE;\r
-\r
- CrIoCq.Qid = NVME_IO_QUEUE;\r
- CrIoCq.Qsize = NVME_CCQ_SIZE;\r
- CrIoCq.Pc = 1;\r
- CopyMem (&CommandPacket.NvmeCmd->Cdw10, &CrIoCq, sizeof (NVME_ADMIN_CRIOCQ));\r
- CommandPacket.NvmeCmd->Flags = CDW10_VALID | CDW11_VALID;\r
-\r
- Status = Private->Passthru.PassThru (\r
- &Private->Passthru,\r
- 0,\r
- &CommandPacket,\r
- NULL\r
- );\r
+ CrIoCq.Qid = Index;\r
+ CrIoCq.Qsize = QueueSize;\r
+ CrIoCq.Pc = 1;\r
+ CopyMem (&CommandPacket.NvmeCmd->Cdw10, &CrIoCq, sizeof (NVME_ADMIN_CRIOCQ));\r
+ CommandPacket.NvmeCmd->Flags = CDW10_VALID | CDW11_VALID;\r
+\r
+ Status = Private->Passthru.PassThru (\r
+ &Private->Passthru,\r
+ 0,\r
+ &CommandPacket,\r
+ NULL\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ break;\r
+ }\r
+ }\r
\r
return Status;\r
}\r
EFI_NVM_EXPRESS_COMPLETION Completion;\r
EFI_STATUS Status;\r
NVME_ADMIN_CRIOSQ CrIoSq;\r
+ UINT32 Index;\r
+ UINT16 QueueSize;\r
+\r
+ Status = EFI_SUCCESS;\r
+\r
+ for (Index = 1; Index < NVME_MAX_QUEUES; Index++) {\r
+ ZeroMem (&CommandPacket, sizeof(EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET));\r
+ ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
+ ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
+ ZeroMem (&CrIoSq, sizeof(NVME_ADMIN_CRIOSQ));\r
+\r
+ CommandPacket.NvmeCmd = &Command;\r
+ CommandPacket.NvmeCompletion = &Completion;\r
+\r
+ Command.Cdw0.Opcode = NVME_ADMIN_CRIOSQ_CMD;\r
+ CommandPacket.TransferBuffer = Private->SqBufferPciAddr[Index];\r
+ CommandPacket.TransferLength = EFI_PAGE_SIZE;\r
+ CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;\r
+ CommandPacket.QueueType = NVME_ADMIN_QUEUE;\r
+\r
+ if (Index == 1) {\r
+ QueueSize = NVME_CSQ_SIZE;\r
+ } else {\r
+ if (Private->Cap.Mqes > NVME_ASYNC_CSQ_SIZE) {\r
+ QueueSize = NVME_ASYNC_CSQ_SIZE;\r
+ } else {\r
+ QueueSize = Private->Cap.Mqes;\r
+ }\r
+ }\r
\r
- ZeroMem (&CommandPacket, sizeof(EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET));\r
- ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
- ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
- ZeroMem (&CrIoSq, sizeof(NVME_ADMIN_CRIOSQ));\r
-\r
- CommandPacket.NvmeCmd = &Command;\r
- CommandPacket.NvmeCompletion = &Completion;\r
-\r
- Command.Cdw0.Opcode = NVME_ADMIN_CRIOSQ_OPC;\r
- CommandPacket.TransferBuffer = Private->SqBufferPciAddr[1];\r
- CommandPacket.TransferLength = EFI_PAGE_SIZE;\r
- CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;\r
- CommandPacket.QueueType = NVME_ADMIN_QUEUE;\r
-\r
- CrIoSq.Qid = NVME_IO_QUEUE;\r
- CrIoSq.Qsize = NVME_CSQ_SIZE;\r
- CrIoSq.Pc = 1;\r
- CrIoSq.Cqid = NVME_IO_QUEUE;\r
- CrIoSq.Qprio = 0;\r
- CopyMem (&CommandPacket.NvmeCmd->Cdw10, &CrIoSq, sizeof (NVME_ADMIN_CRIOSQ));\r
- CommandPacket.NvmeCmd->Flags = CDW10_VALID | CDW11_VALID;\r
-\r
- Status = Private->Passthru.PassThru (\r
- &Private->Passthru,\r
- 0,\r
- &CommandPacket,\r
- NULL\r
- );\r
+ CrIoSq.Qid = Index;\r
+ CrIoSq.Qsize = QueueSize;\r
+ CrIoSq.Pc = 1;\r
+ CrIoSq.Cqid = Index;\r
+ CrIoSq.Qprio = 0;\r
+ CopyMem (&CommandPacket.NvmeCmd->Cdw10, &CrIoSq, sizeof (NVME_ADMIN_CRIOSQ));\r
+ CommandPacket.NvmeCmd->Flags = CDW10_VALID | CDW11_VALID;\r
+\r
+ Status = Private->Passthru.PassThru (\r
+ &Private->Passthru,\r
+ 0,\r
+ &CommandPacket,\r
+ NULL\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ break;\r
+ }\r
+ }\r
\r
return Status;\r
}\r
NVME_AQA Aqa;\r
NVME_ASQ Asq;\r
NVME_ACQ Acq;\r
-\r
+ UINT8 Sn[21];\r
+ UINT8 Mn[41];\r
//\r
// Save original PCI attributes and enable this controller.\r
//\r
return Status;\r
}\r
\r
+ //\r
+ // Enable 64-bit DMA support in the PCI layer.\r
+ //\r
+ Status = PciIo->Attributes (\r
+ PciIo,\r
+ EfiPciIoAttributeOperationEnable,\r
+ EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE,\r
+ NULL\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_WARN, "NvmeControllerInit: failed to enable 64-bit DMA (%r)\n", Status));\r
+ }\r
+\r
//\r
// Read the Controller Capabilities register and verify that the NVM command set is supported\r
//\r
\r
Private->Cid[0] = 0;\r
Private->Cid[1] = 0;\r
+ Private->Cid[2] = 0;\r
+ Private->Pt[0] = 0;\r
+ Private->Pt[1] = 0;\r
+ Private->Pt[2] = 0;\r
+ Private->SqTdbl[0].Sqt = 0;\r
+ Private->SqTdbl[1].Sqt = 0;\r
+ Private->SqTdbl[2].Sqt = 0;\r
+ Private->CqHdbl[0].Cqh = 0;\r
+ Private->CqHdbl[1].Cqh = 0;\r
+ Private->CqHdbl[2].Cqh = 0;\r
+ Private->AsyncSqHead = 0;\r
\r
Status = NvmeDisableController (Private);\r
\r
//\r
// Address of admin submission queue.\r
//\r
- Asq.Rsvd1 = 0;\r
- Asq.Asqb = (UINT64)(UINTN)(Private->BufferPciAddr) >> 12;\r
+ Asq = (UINT64)(UINTN)(Private->BufferPciAddr) & ~0xFFF;\r
\r
//\r
// Address of admin completion queue.\r
//\r
- Acq.Rsvd1 = 0;\r
- Acq.Acqb = (UINT64)(UINTN)(Private->BufferPciAddr + EFI_PAGE_SIZE) >> 12;\r
+ Acq = (UINT64)(UINTN)(Private->BufferPciAddr + EFI_PAGE_SIZE) & ~0xFFF;\r
\r
//\r
// Address of I/O submission & completion queue.\r
//\r
+ ZeroMem (Private->Buffer, EFI_PAGES_TO_SIZE (6));\r
Private->SqBuffer[0] = (NVME_SQ *)(UINTN)(Private->Buffer);\r
Private->SqBufferPciAddr[0] = (NVME_SQ *)(UINTN)(Private->BufferPciAddr);\r
Private->CqBuffer[0] = (NVME_CQ *)(UINTN)(Private->Buffer + 1 * EFI_PAGE_SIZE);\r
Private->SqBufferPciAddr[1] = (NVME_SQ *)(UINTN)(Private->BufferPciAddr + 2 * EFI_PAGE_SIZE);\r
Private->CqBuffer[1] = (NVME_CQ *)(UINTN)(Private->Buffer + 3 * EFI_PAGE_SIZE);\r
Private->CqBufferPciAddr[1] = (NVME_CQ *)(UINTN)(Private->BufferPciAddr + 3 * EFI_PAGE_SIZE);\r
+ Private->SqBuffer[2] = (NVME_SQ *)(UINTN)(Private->Buffer + 4 * EFI_PAGE_SIZE);\r
+ Private->SqBufferPciAddr[2] = (NVME_SQ *)(UINTN)(Private->BufferPciAddr + 4 * EFI_PAGE_SIZE);\r
+ Private->CqBuffer[2] = (NVME_CQ *)(UINTN)(Private->Buffer + 5 * EFI_PAGE_SIZE);\r
+ Private->CqBufferPciAddr[2] = (NVME_CQ *)(UINTN)(Private->BufferPciAddr + 5 * EFI_PAGE_SIZE);\r
\r
DEBUG ((EFI_D_INFO, "Private->Buffer = [%016X]\n", (UINT64)(UINTN)Private->Buffer));\r
- DEBUG ((EFI_D_INFO, "Admin Submission Queue size (Aqa.Asqs) = [%08X]\n", Aqa.Asqs));\r
- DEBUG ((EFI_D_INFO, "Admin Completion Queue size (Aqa.Acqs) = [%08X]\n", Aqa.Acqs));\r
- DEBUG ((EFI_D_INFO, "Admin Submission Queue (SqBuffer[0]) = [%016X]\n", Private->SqBuffer[0]));\r
- DEBUG ((EFI_D_INFO, "Admin Completion Queue (CqBuffer[0]) = [%016X]\n", Private->CqBuffer[0]));\r
- DEBUG ((EFI_D_INFO, "I/O Submission Queue (SqBuffer[1]) = [%016X]\n", Private->SqBuffer[1]));\r
- DEBUG ((EFI_D_INFO, "I/O Completion Queue (CqBuffer[1]) = [%016X]\n", Private->CqBuffer[1]));\r
+ DEBUG ((EFI_D_INFO, "Admin Submission Queue size (Aqa.Asqs) = [%08X]\n", Aqa.Asqs));\r
+ DEBUG ((EFI_D_INFO, "Admin Completion Queue size (Aqa.Acqs) = [%08X]\n", Aqa.Acqs));\r
+ DEBUG ((EFI_D_INFO, "Admin Submission Queue (SqBuffer[0]) = [%016X]\n", Private->SqBuffer[0]));\r
+ DEBUG ((EFI_D_INFO, "Admin Completion Queue (CqBuffer[0]) = [%016X]\n", Private->CqBuffer[0]));\r
+ DEBUG ((EFI_D_INFO, "Sync I/O Submission Queue (SqBuffer[1]) = [%016X]\n", Private->SqBuffer[1]));\r
+ DEBUG ((EFI_D_INFO, "Sync I/O Completion Queue (CqBuffer[1]) = [%016X]\n", Private->CqBuffer[1]));\r
+ DEBUG ((EFI_D_INFO, "Async I/O Submission Queue (SqBuffer[2]) = [%016X]\n", Private->SqBuffer[2]));\r
+ DEBUG ((EFI_D_INFO, "Async I/O Completion Queue (CqBuffer[2]) = [%016X]\n", Private->CqBuffer[2]));\r
\r
//\r
// Program admin queue attributes.\r
//\r
// Allocate buffer for Identify Controller data\r
//\r
- Private->ControllerData = (NVME_ADMIN_CONTROLLER_DATA *)AllocateZeroPool (sizeof(NVME_ADMIN_CONTROLLER_DATA));\r
-\r
if (Private->ControllerData == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
+ Private->ControllerData = (NVME_ADMIN_CONTROLLER_DATA *)AllocateZeroPool (sizeof(NVME_ADMIN_CONTROLLER_DATA));\r
+\r
+ if (Private->ControllerData == NULL) {\r
+ return EFI_OUT_OF_RESOURCES;\r
+ }\r
}\r
\r
//\r
//\r
// Dump NvmExpress Identify Controller Data\r
//\r
- Private->ControllerData->Sn[19] = 0;\r
- Private->ControllerData->Mn[39] = 0;\r
+ CopyMem (Sn, Private->ControllerData->Sn, sizeof (Private->ControllerData->Sn));\r
+ Sn[20] = 0;\r
+ CopyMem (Mn, Private->ControllerData->Mn, sizeof (Private->ControllerData->Mn));\r
+ Mn[40] = 0;\r
DEBUG ((EFI_D_INFO, " == NVME IDENTIFY CONTROLLER DATA ==\n"));\r
DEBUG ((EFI_D_INFO, " PCI VID : 0x%x\n", Private->ControllerData->Vid));\r
DEBUG ((EFI_D_INFO, " PCI SSVID : 0x%x\n", Private->ControllerData->Ssvid));\r
- DEBUG ((EFI_D_INFO, " SN : %a\n", (CHAR8 *)(Private->ControllerData->Sn)));\r
- DEBUG ((EFI_D_INFO, " MN : %a\n", (CHAR8 *)(Private->ControllerData->Mn)));\r
+ DEBUG ((EFI_D_INFO, " SN : %a\n", Sn));\r
+ DEBUG ((EFI_D_INFO, " MN : %a\n", Mn));\r
DEBUG ((EFI_D_INFO, " FR : 0x%x\n", *((UINT64*)Private->ControllerData->Fr)));\r
DEBUG ((EFI_D_INFO, " RAB : 0x%x\n", Private->ControllerData->Rab));\r
DEBUG ((EFI_D_INFO, " IEEE : 0x%x\n", *(UINT32*)Private->ControllerData->Ieee_oui));\r
DEBUG ((EFI_D_INFO, " NN : 0x%x\n", Private->ControllerData->Nn));\r
\r
//\r
- // Create one I/O completion queue.\r
+ // Create two I/O completion queues.\r
+ // One for blocking I/O, one for non-blocking I/O.\r
//\r
Status = NvmeCreateIoCompletionQueue (Private);\r
if (EFI_ERROR(Status)) {\r
}\r
\r
//\r
- // Create one I/O Submission queue.\r
+ // Create two I/O Submission queues.\r
+ // One for blocking I/O, one for non-blocking I/O.\r
//\r
Status = NvmeCreateIoSubmissionQueue (Private);\r
- if (EFI_ERROR(Status)) {\r
- return Status;\r
- }\r
\r
return Status;\r
}\r
\r
+/**\r
+ This routine is called to properly shutdown the Nvm Express controller per NVMe spec.\r
+\r
+ @param[in] ResetType The type of reset to perform.\r
+ @param[in] ResetStatus The status code for the reset.\r
+ @param[in] DataSize The size, in bytes, of ResetData.\r
+ @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or\r
+ EfiResetShutdown the data buffer starts with a Null-terminated\r
+ string, optionally followed by additional binary data.\r
+ The string is a description that the caller may use to further\r
+ indicate the reason for the system reset. ResetData is only\r
+ valid if ResetStatus is something other than EFI_SUCCESS\r
+ unless the ResetType is EfiResetPlatformSpecific\r
+ where a minimum amount of ResetData is always required.\r
+ For a ResetType of EfiResetPlatformSpecific the data buffer\r
+ also starts with a Null-terminated string that is followed\r
+ by an EFI_GUID that describes the specific type of reset to perform.\r
+**/\r
+VOID\r
+EFIAPI\r
+NvmeShutdownAllControllers (\r
+ IN EFI_RESET_TYPE ResetType,\r
+ IN EFI_STATUS ResetStatus,\r
+ IN UINTN DataSize,\r
+ IN VOID *ResetData OPTIONAL\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_HANDLE *Handles;\r
+ UINTN HandleCount;\r
+ UINTN HandleIndex;\r
+ EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfos;\r
+ UINTN OpenInfoCount;\r
+ UINTN OpenInfoIndex;\r
+ EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *NvmePassThru;\r
+ NVME_CC Cc;\r
+ NVME_CSTS Csts;\r
+ UINTN Index;\r
+ NVME_CONTROLLER_PRIVATE_DATA *Private;\r
+\r
+ Status = gBS->LocateHandleBuffer (\r
+ ByProtocol,\r
+ &gEfiPciIoProtocolGuid,\r
+ NULL,\r
+ &HandleCount,\r
+ &Handles\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ HandleCount = 0;\r
+ }\r
+\r
+ for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {\r
+ Status = gBS->OpenProtocolInformation (\r
+ Handles[HandleIndex],\r
+ &gEfiPciIoProtocolGuid,\r
+ &OpenInfos,\r
+ &OpenInfoCount\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ continue;\r
+ }\r
+\r
+ for (OpenInfoIndex = 0; OpenInfoIndex < OpenInfoCount; OpenInfoIndex++) {\r
+ //\r
+ // Find all the NVME controller managed by this driver.\r
+ // gImageHandle equals to DriverBinding handle for this driver.\r
+ //\r
+ if (((OpenInfos[OpenInfoIndex].Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) &&\r
+ (OpenInfos[OpenInfoIndex].AgentHandle == gImageHandle)) {\r
+ Status = gBS->OpenProtocol (\r
+ OpenInfos[OpenInfoIndex].ControllerHandle,\r
+ &gEfiNvmExpressPassThruProtocolGuid,\r
+ (VOID **) &NvmePassThru,\r
+ NULL,\r
+ NULL,\r
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ continue;\r
+ }\r
+ Private = NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU (NvmePassThru);\r
+\r
+ //\r
+ // Read Controller Configuration Register.\r
+ //\r
+ Status = ReadNvmeControllerConfiguration (Private, &Cc);\r
+ if (EFI_ERROR(Status)) {\r
+ continue;\r
+ }\r
+ //\r
+ // The host should set the Shutdown Notification (CC.SHN) field to 01b\r
+ // to indicate a normal shutdown operation.\r
+ //\r
+ Cc.Shn = NVME_CC_SHN_NORMAL_SHUTDOWN;\r
+ Status = WriteNvmeControllerConfiguration (Private, &Cc);\r
+ if (EFI_ERROR(Status)) {\r
+ continue;\r
+ }\r
+\r
+ //\r
+ // The controller indicates when shutdown processing is completed by updating the\r
+ // Shutdown Status (CSTS.SHST) field to 10b.\r
+ // Wait up to 45 seconds (break down to 4500 x 10ms) for the shutdown to complete.\r
+ //\r
+ for (Index = 0; Index < NVME_SHUTDOWN_PROCESS_TIMEOUT * 100; Index++) {\r
+ Status = ReadNvmeControllerStatus (Private, &Csts);\r
+ if (!EFI_ERROR(Status) && (Csts.Shst == NVME_CSTS_SHST_SHUTDOWN_COMPLETED)) {\r
+ DEBUG((DEBUG_INFO, "NvmeShutdownController: shutdown processing is completed after %dms.\n", Index * 10));\r
+ break;\r
+ }\r
+ //\r
+ // Stall for 10ms\r
+ //\r
+ gBS->Stall (10 * 1000);\r
+ }\r
+\r
+ if (Index == NVME_SHUTDOWN_PROCESS_TIMEOUT * 100) {\r
+ DEBUG((DEBUG_ERROR, "NvmeShutdownController: shutdown processing is timed out\n"));\r
+ }\r
+ }\r
+ }\r
+ }\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
+ EFI_STATUS Status;\r
+ EFI_RESET_NOTIFICATION_PROTOCOL *ResetNotify;\r
+\r
+ mNvmeControllerNumber++;\r
+ if (mNvmeControllerNumber == 1) {\r
+ Status = gBS->LocateProtocol (&gEfiResetNotificationProtocolGuid, NULL, (VOID **) &ResetNotify);\r
+ if (!EFI_ERROR (Status)) {\r
+ Status = ResetNotify->RegisterResetNotify (ResetNotify, NvmeShutdownAllControllers);\r
+ ASSERT_EFI_ERROR (Status);\r
+ } else {\r
+ DEBUG ((DEBUG_WARN, "NVME: ResetNotification absent! Shutdown notification cannot be performed!\n"));\r
+ }\r
+ }\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
+ EFI_STATUS Status;\r
+ EFI_RESET_NOTIFICATION_PROTOCOL *ResetNotify;\r
+\r
+ mNvmeControllerNumber--;\r
+ if (mNvmeControllerNumber == 0) {\r
+ Status = gBS->LocateProtocol (&gEfiResetNotificationProtocolGuid, NULL, (VOID **) &ResetNotify);\r
+ if (!EFI_ERROR (Status)) {\r
+ Status = ResetNotify->UnregisterResetNotify (ResetNotify, NvmeShutdownAllControllers);\r
+ ASSERT_EFI_ERROR (Status);\r
+ }\r
+ }\r
+}\r
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