projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 05fd2a92 HW |
1 | /** @file\r |
| 2 | The NvmExpressPei driver is used to manage non-volatile memory subsystem\r | |
| 3 | which follows NVM Express specification at PEI phase.\r | |
| 4 | \r | |
| 5 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r | |
| 6 | \r | |
| 9d510e61 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 05fd2a92 HW |
8 | \r |
| 9 | **/\r | |
| 10 | \r | |
| 11 | #include "NvmExpressPei.h"\r | |
| 12 | \r | |
| 13 | #include <Guid/S3StorageDeviceInitList.h>\r | |
| 14 | \r | |
| 15 | #include <Library/LockBoxLib.h>\r | |
| 16 | \r | |
| 17 | /**\r | |
| 18 | Determine if a specific NVM Express controller can be skipped for S3 phase.\r | |
| 19 | \r | |
| 20 | @param[in] HcDevicePath Device path of the controller.\r | |
| 21 | @param[in] HcDevicePathLength Length of the device path specified by\r | |
| 22 | HcDevicePath.\r | |
| 23 | \r | |
| 24 | @retval The number of ports that need to be enumerated.\r | |
| 25 | \r | |
| 26 | **/\r | |
| 27 | BOOLEAN\r | |
| 28 | NvmeS3SkipThisController (\r | |
| 29 | IN EFI_DEVICE_PATH_PROTOCOL *HcDevicePath,\r | |
| 30 | IN UINTN HcDevicePathLength\r | |
| 31 | )\r | |
| 32 | {\r | |
| 33 | EFI_STATUS Status;\r | |
| 34 | UINT8 DummyData;\r | |
| 35 | UINTN S3InitDevicesLength;\r | |
| 36 | EFI_DEVICE_PATH_PROTOCOL *S3InitDevices;\r | |
| 37 | EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;\r | |
| 38 | UINTN DevicePathInstLength;\r | |
| 39 | BOOLEAN EntireEnd;\r | |
| 40 | BOOLEAN Skip;\r | |
| 41 | \r | |
| 42 | //\r | |
| 43 | // From the LockBox, get the list of device paths for devices need to be\r | |
| 44 | // initialized in S3.\r | |
| 45 | //\r | |
| 46 | S3InitDevices = NULL;\r | |
| 47 | S3InitDevicesLength = sizeof (DummyData);\r | |
| 48 | EntireEnd = FALSE;\r | |
| 49 | Skip = TRUE;\r | |
| 50 | Status = RestoreLockBox (&gS3StorageDeviceInitListGuid, &DummyData, &S3InitDevicesLength);\r | |
| 51 | if (Status != EFI_BUFFER_TOO_SMALL) {\r | |
| 52 | return Skip;\r | |
| 53 | } else {\r | |
| 54 | S3InitDevices = AllocatePool (S3InitDevicesLength);\r | |
| 55 | if (S3InitDevices == NULL) {\r | |
| 56 | return Skip;\r | |
| 57 | }\r | |
| 58 | \r | |
| 59 | Status = RestoreLockBox (&gS3StorageDeviceInitListGuid, S3InitDevices, &S3InitDevicesLength);\r | |
| 60 | if (EFI_ERROR (Status)) {\r | |
| 61 | return Skip;\r | |
| 62 | }\r | |
| 63 | }\r | |
| 64 | \r | |
| 65 | if (S3InitDevices == NULL) {\r | |
| 66 | return Skip;\r | |
| 67 | }\r | |
| 68 | \r | |
| 69 | //\r | |
| 70 | // Only need to initialize the controllers that exist in the device list.\r | |
| 71 | //\r | |
| 72 | do {\r | |
| 73 | //\r | |
| 74 | // Fetch the size of current device path instance.\r | |
| 75 | //\r | |
| 76 | Status = GetDevicePathInstanceSize (\r | |
| 77 | S3InitDevices,\r | |
| 78 | &DevicePathInstLength,\r | |
| 79 | &EntireEnd\r | |
| 80 | );\r | |
| 81 | if (EFI_ERROR (Status)) {\r | |
| 82 | break;\r | |
| 83 | }\r | |
| 84 | \r | |
| 85 | DevicePathInst = S3InitDevices;\r | |
| 86 | S3InitDevices = (EFI_DEVICE_PATH_PROTOCOL *)((UINTN) S3InitDevices + DevicePathInstLength);\r | |
| 87 | \r | |
| 88 | if (HcDevicePathLength >= DevicePathInstLength) {\r | |
| 89 | continue;\r | |
| 90 | }\r | |
| 91 | \r | |
| 92 | //\r | |
| 93 | // Compare the device paths to determine if the device is managed by this\r | |
| 94 | // controller.\r | |
| 95 | //\r | |
| 96 | if (CompareMem (\r | |
| 97 | DevicePathInst,\r | |
| 98 | HcDevicePath,\r | |
| 99 | HcDevicePathLength - sizeof (EFI_DEVICE_PATH_PROTOCOL)\r | |
| 100 | ) == 0) {\r | |
| 101 | Skip = FALSE;\r | |
| 102 | break;\r | |
| 103 | }\r | |
| 104 | } while (!EntireEnd);\r | |
| 105 | \r | |
| 106 | return Skip;\r | |
| 107 | }\r |