+/**\r
+ Call back function when the timer event is signaled.\r
+\r
+ @param[in] Event The Event this notify function registered to.\r
+ @param[in] Context Pointer to the context data registered to the\r
+ Event.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+ProcessAsyncTaskList (\r
+ IN EFI_EVENT Event,\r
+ IN VOID* Context\r
+ )\r
+{\r
+ NVME_CONTROLLER_PRIVATE_DATA *Private;\r
+ EFI_PCI_IO_PROTOCOL *PciIo;\r
+ NVME_CQ *Cq;\r
+ UINT16 QueueId;\r
+ UINT32 Data;\r
+ LIST_ENTRY *Link;\r
+ LIST_ENTRY *NextLink;\r
+ NVME_PASS_THRU_ASYNC_REQ *AsyncRequest;\r
+ NVME_BLKIO2_SUBTASK *Subtask;\r
+ NVME_BLKIO2_REQUEST *BlkIo2Request;\r
+ EFI_BLOCK_IO2_TOKEN *Token;\r
+ BOOLEAN HasNewItem;\r
+ EFI_STATUS Status;\r
+\r
+ Private = (NVME_CONTROLLER_PRIVATE_DATA*)Context;\r
+ QueueId = 2;\r
+ Cq = Private->CqBuffer[QueueId] + Private->CqHdbl[QueueId].Cqh;\r
+ HasNewItem = FALSE;\r
+ PciIo = Private->PciIo;\r
+\r
+ //\r
+ // Submit asynchronous subtasks to the NVMe Submission Queue\r
+ //\r
+ for (Link = GetFirstNode (&Private->UnsubmittedSubtasks);\r
+ !IsNull (&Private->UnsubmittedSubtasks, Link);\r
+ Link = NextLink) {\r
+ NextLink = GetNextNode (&Private->UnsubmittedSubtasks, Link);\r
+ Subtask = NVME_BLKIO2_SUBTASK_FROM_LINK (Link);\r
+ BlkIo2Request = Subtask->BlockIo2Request;\r
+ Token = BlkIo2Request->Token;\r
+ RemoveEntryList (Link);\r
+ BlkIo2Request->UnsubmittedSubtaskNum--;\r
+\r
+ //\r
+ // If any previous subtask fails, do not process subsequent ones.\r
+ //\r
+ if (Token->TransactionStatus != EFI_SUCCESS) {\r
+ if (IsListEmpty (&BlkIo2Request->SubtasksQueue) &&\r
+ BlkIo2Request->LastSubtaskSubmitted &&\r
+ (BlkIo2Request->UnsubmittedSubtaskNum == 0)) {\r
+ //\r
+ // Remove the BlockIo2 request from the device asynchronous queue.\r
+ //\r
+ RemoveEntryList (&BlkIo2Request->Link);\r
+ FreePool (BlkIo2Request);\r
+ gBS->SignalEvent (Token->Event);\r
+ }\r
+\r
+ FreePool (Subtask->CommandPacket->NvmeCmd);\r
+ FreePool (Subtask->CommandPacket->NvmeCompletion);\r
+ FreePool (Subtask->CommandPacket);\r
+ FreePool (Subtask);\r
+\r
+ continue;\r
+ }\r
+\r
+ Status = Private->Passthru.PassThru (\r
+ &Private->Passthru,\r
+ Subtask->NamespaceId,\r
+ Subtask->CommandPacket,\r
+ Subtask->Event\r
+ );\r
+ if (Status == EFI_NOT_READY) {\r
+ InsertHeadList (&Private->UnsubmittedSubtasks, Link);\r
+ BlkIo2Request->UnsubmittedSubtaskNum++;\r
+ break;\r
+ } else if (EFI_ERROR (Status)) {\r
+ Token->TransactionStatus = EFI_DEVICE_ERROR;\r
+\r
+ if (IsListEmpty (&BlkIo2Request->SubtasksQueue) &&\r
+ Subtask->IsLast) {\r
+ //\r
+ // Remove the BlockIo2 request from the device asynchronous queue.\r
+ //\r
+ RemoveEntryList (&BlkIo2Request->Link);\r
+ FreePool (BlkIo2Request);\r
+ gBS->SignalEvent (Token->Event);\r
+ }\r
+\r
+ FreePool (Subtask->CommandPacket->NvmeCmd);\r
+ FreePool (Subtask->CommandPacket->NvmeCompletion);\r
+ FreePool (Subtask->CommandPacket);\r
+ FreePool (Subtask);\r
+ } else {\r
+ InsertTailList (&BlkIo2Request->SubtasksQueue, Link);\r
+ if (Subtask->IsLast) {\r
+ BlkIo2Request->LastSubtaskSubmitted = TRUE;\r
+ }\r
+ }\r
+ }\r
+\r
+ while (Cq->Pt != Private->Pt[QueueId]) {\r
+ ASSERT (Cq->Sqid == QueueId);\r
+\r
+ HasNewItem = TRUE;\r
+\r
+ //\r
+ // Find the command with given Command Id.\r
+ //\r
+ for (Link = GetFirstNode (&Private->AsyncPassThruQueue);\r
+ !IsNull (&Private->AsyncPassThruQueue, Link);\r
+ Link = NextLink) {\r
+ NextLink = GetNextNode (&Private->AsyncPassThruQueue, Link);\r
+ AsyncRequest = NVME_PASS_THRU_ASYNC_REQ_FROM_THIS (Link);\r
+ if (AsyncRequest->CommandId == Cq->Cid) {\r
+ //\r
+ // Copy the Respose Queue entry for this command to the callers\r
+ // response buffer.\r
+ //\r
+ CopyMem (\r
+ AsyncRequest->Packet->NvmeCompletion,\r
+ Cq,\r
+ sizeof(EFI_NVM_EXPRESS_COMPLETION)\r
+ );\r
+\r
+ //\r
+ // Free the resources allocated before cmd submission\r
+ //\r
+ if (AsyncRequest->MapData != NULL) {\r
+ PciIo->Unmap (PciIo, AsyncRequest->MapData);\r
+ }\r
+ if (AsyncRequest->MapMeta != NULL) {\r
+ PciIo->Unmap (PciIo, AsyncRequest->MapMeta);\r
+ }\r
+ if (AsyncRequest->MapPrpList != NULL) {\r
+ PciIo->Unmap (PciIo, AsyncRequest->MapPrpList);\r
+ }\r
+ if (AsyncRequest->PrpListHost != NULL) {\r
+ PciIo->FreeBuffer (\r
+ PciIo,\r
+ AsyncRequest->PrpListNo,\r
+ AsyncRequest->PrpListHost\r
+ );\r
+ }\r
+\r
+ RemoveEntryList (Link);\r
+ gBS->SignalEvent (AsyncRequest->CallerEvent);\r
+ FreePool (AsyncRequest);\r
+\r
+ //\r
+ // Update submission queue head.\r
+ //\r
+ Private->AsyncSqHead = Cq->Sqhd;\r
+ break;\r
+ }\r
+ }\r
+\r
+ Private->CqHdbl[QueueId].Cqh++;\r
+ if (Private->CqHdbl[QueueId].Cqh > NVME_ASYNC_CCQ_SIZE) {\r
+ Private->CqHdbl[QueueId].Cqh = 0;\r
+ Private->Pt[QueueId] ^= 1;\r
+ }\r
+\r
+ Cq = Private->CqBuffer[QueueId] + Private->CqHdbl[QueueId].Cqh;\r
+ }\r
+\r
+ if (HasNewItem) {\r
+ Data = ReadUnaligned32 ((UINT32*)&Private->CqHdbl[QueueId]);\r
+ PciIo->Mem.Write (\r
+ PciIo,\r
+ EfiPciIoWidthUint32,\r
+ NVME_BAR,\r
+ NVME_CQHDBL_OFFSET(QueueId, Private->Cap.Dstrd),\r
+ 1,\r
+ &Data\r
+ );\r
+ }\r
+}\r
+\r