| 1 | /** @file
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| 2 | Capsule Runtime Driver produces two UEFI capsule runtime services.
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| 3 | (UpdateCapsule, QueryCapsuleCapabilities)
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| 4 | It installs the Capsule Architectural Protocol defined in PI1.0a to signify
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| 5 | the capsule runtime services are ready.
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| 6 |
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| 7 | Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
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| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 9 |
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| 10 | **/
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| 11 |
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| 12 | #include "CapsuleService.h"
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| 13 |
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| 14 | //
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| 15 | // Handle for the installation of Capsule Architecture Protocol.
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| 16 | //
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| 17 | EFI_HANDLE mNewHandle = NULL;
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| 18 |
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| 19 | //
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| 20 | // The times of calling UpdateCapsule ()
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| 21 | //
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| 22 | UINTN mTimes = 0;
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| 23 |
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| 24 | UINT32 mMaxSizePopulateCapsule = 0;
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| 25 | UINT32 mMaxSizeNonPopulateCapsule = 0;
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| 26 |
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| 27 | /**
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| 28 | Passes capsules to the firmware with both virtual and physical mapping. Depending on the intended
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| 29 | consumption, the firmware may process the capsule immediately. If the payload should persist
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| 30 | across a system reset, the reset value returned from EFI_QueryCapsuleCapabilities must
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| 31 | be passed into ResetSystem() and will cause the capsule to be processed by the firmware as
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| 32 | part of the reset process.
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| 33 |
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| 34 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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| 35 | being passed into update capsule.
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| 36 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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| 37 | CaspuleHeaderArray.
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| 38 | @param ScatterGatherList Physical pointer to a set of
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| 39 | EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the
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| 40 | location in physical memory of a set of capsules.
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| 41 |
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| 42 | @retval EFI_SUCCESS Valid capsule was passed. If
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| 43 | CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set, the
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| 44 | capsule has been successfully processed by the firmware.
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| 45 | @retval EFI_DEVICE_ERROR The capsule update was started, but failed due to a device error.
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| 46 | @retval EFI_INVALID_PARAMETER CapsuleSize is NULL, or an incompatible set of flags were
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| 47 | set in the capsule header.
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| 48 | @retval EFI_INVALID_PARAMETER CapsuleCount is Zero.
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| 49 | @retval EFI_INVALID_PARAMETER For across reset capsule image, ScatterGatherList is NULL.
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| 50 | @retval EFI_UNSUPPORTED CapsuleImage is not recognized by the firmware.
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| 51 | @retval EFI_OUT_OF_RESOURCES When ExitBootServices() has been previously called this error indicates the capsule
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| 52 | is compatible with this platform but is not capable of being submitted or processed
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| 53 | in runtime. The caller may resubmit the capsule prior to ExitBootServices().
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| 54 | @retval EFI_OUT_OF_RESOURCES When ExitBootServices() has not been previously called then this error indicates
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| 55 | the capsule is compatible with this platform but there are insufficient resources to process.
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| 56 |
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| 57 | **/
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| 58 | EFI_STATUS
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| 59 | EFIAPI
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| 60 | UpdateCapsule (
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| 61 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
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| 62 | IN UINTN CapsuleCount,
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| 63 | IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL
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| 64 | )
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| 65 | {
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| 66 | UINTN ArrayNumber;
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| 67 | EFI_STATUS Status;
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| 68 | EFI_CAPSULE_HEADER *CapsuleHeader;
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| 69 | BOOLEAN NeedReset;
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| 70 | BOOLEAN InitiateReset;
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| 71 | CHAR16 CapsuleVarName[30];
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| 72 | CHAR16 *TempVarName;
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| 73 |
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| 74 | //
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| 75 | // Check if platform support Capsule In RAM or not.
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| 76 | // Platform could choose to drop CapsulePei/CapsuleX64 and do not support Capsule In RAM.
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| 77 | //
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| 78 | if (!PcdGetBool (PcdCapsuleInRamSupport)) {
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| 79 | return EFI_UNSUPPORTED;
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| 80 | }
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| 81 |
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| 82 | //
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| 83 | // Capsule Count can't be less than one.
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| 84 | //
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| 85 | if (CapsuleCount < 1) {
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| 86 | return EFI_INVALID_PARAMETER;
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| 87 | }
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| 88 |
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| 89 | NeedReset = FALSE;
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| 90 | InitiateReset = FALSE;
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| 91 | CapsuleHeader = NULL;
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| 92 | CapsuleVarName[0] = 0;
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| 93 |
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| 94 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 95 | //
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| 96 | // A capsule which has the CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE flag must have
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| 97 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 98 | //
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| 99 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 100 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE)) == CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) {
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| 101 | return EFI_INVALID_PARAMETER;
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| 102 | }
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| 103 |
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| 104 | //
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| 105 | // A capsule which has the CAPSULE_FLAGS_INITIATE_RESET flag must have
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| 106 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 107 | //
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| 108 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET)) == CAPSULE_FLAGS_INITIATE_RESET) {
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| 109 | return EFI_INVALID_PARAMETER;
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| 110 | }
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| 111 |
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| 112 | //
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| 113 | // Check FMP capsule flag
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| 114 | //
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| 115 | if ( CompareGuid (&CapsuleHeader->CapsuleGuid, &gEfiFmpCapsuleGuid)
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| 116 | && ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) != 0))
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| 117 | {
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| 118 | return EFI_INVALID_PARAMETER;
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| 119 | }
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| 120 |
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| 121 | //
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| 122 | // Check Capsule image without populate flag by firmware support capsule function
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| 123 | //
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| 124 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) == 0) {
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| 125 | Status = SupportCapsuleImage (CapsuleHeader);
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| 126 | if (EFI_ERROR (Status)) {
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| 127 | return Status;
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| 128 | }
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| 129 | }
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| 130 | }
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| 131 |
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| 132 | //
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| 133 | // Walk through all capsules, record whether there is a capsule needs reset
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| 134 | // or initiate reset. And then process capsules which has no reset flag directly.
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| 135 | //
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| 136 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 137 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 138 | //
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| 139 | // Here should be in the boot-time for non-reset capsule image
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| 140 | // Platform specific update for the non-reset capsule image.
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| 141 | //
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| 142 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_PERSIST_ACROSS_RESET) == 0) {
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| 143 | if (EfiAtRuntime () && !FeaturePcdGet (PcdSupportProcessCapsuleAtRuntime)) {
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| 144 | Status = EFI_OUT_OF_RESOURCES;
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| 145 | } else {
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| 146 | Status = ProcessCapsuleImage (CapsuleHeader);
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| 147 | }
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| 148 |
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| 149 | if (EFI_ERROR (Status)) {
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| 150 | return Status;
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| 151 | }
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| 152 | } else {
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| 153 | NeedReset = TRUE;
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| 154 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_INITIATE_RESET) != 0) {
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| 155 | InitiateReset = TRUE;
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| 156 | }
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| 157 | }
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| 158 | }
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| 159 |
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| 160 | //
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| 161 | // After launching all capsules who has no reset flag, if no more capsules claims
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| 162 | // for a system reset just return.
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| 163 | //
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| 164 | if (!NeedReset) {
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| 165 | return EFI_SUCCESS;
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| 166 | }
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| 167 |
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| 168 | //
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| 169 | // ScatterGatherList is only referenced if the capsules are defined to persist across
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| 170 | // system reset.
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| 171 | //
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| 172 | if (ScatterGatherList == (EFI_PHYSICAL_ADDRESS)(UINTN)NULL) {
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| 173 | return EFI_INVALID_PARAMETER;
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| 174 | }
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| 175 |
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| 176 | //
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| 177 | // Check if the platform supports update capsule across a system reset
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| 178 | //
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| 179 | if (!IsPersistAcrossResetCapsuleSupported ()) {
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| 180 | return EFI_UNSUPPORTED;
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| 181 | }
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| 182 |
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| 183 | CapsuleCacheWriteBack (ScatterGatherList);
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| 184 |
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| 185 | //
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| 186 | // Construct variable name CapsuleUpdateData, CapsuleUpdateData1, CapsuleUpdateData2...
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| 187 | // if user calls UpdateCapsule multiple times.
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| 188 | //
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| 189 | StrCpyS (CapsuleVarName, sizeof (CapsuleVarName)/sizeof (CHAR16), EFI_CAPSULE_VARIABLE_NAME);
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| 190 | TempVarName = CapsuleVarName + StrLen (CapsuleVarName);
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| 191 | if (mTimes > 0) {
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| 192 | UnicodeValueToStringS (
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| 193 | TempVarName,
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| 194 | sizeof (CapsuleVarName) - ((UINTN)TempVarName - (UINTN)CapsuleVarName),
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| 195 | 0,
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| 196 | mTimes,
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| 197 | 0
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| 198 | );
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| 199 | }
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| 200 |
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| 201 | //
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| 202 | // ScatterGatherList is only referenced if the capsules are defined to persist across
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| 203 | // system reset. Set its value into NV storage to let pre-boot driver to pick it up
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| 204 | // after coming through a system reset.
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| 205 | //
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| 206 | Status = EfiSetVariable (
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| 207 | CapsuleVarName,
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| 208 | &gEfiCapsuleVendorGuid,
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| 209 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
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| 210 | sizeof (UINTN),
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| 211 | (VOID *)&ScatterGatherList
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| 212 | );
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| 213 | if (!EFI_ERROR (Status)) {
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| 214 | //
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| 215 | // Variable has been set successfully, increase variable index.
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| 216 | //
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| 217 | mTimes++;
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| 218 | if (InitiateReset) {
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| 219 | //
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| 220 | // Firmware that encounters a capsule which has the CAPSULE_FLAGS_INITIATE_RESET Flag set in its header
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| 221 | // will initiate a reset of the platform which is compatible with the passed-in capsule request and will
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| 222 | // not return back to the caller.
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| 223 | //
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| 224 | EfiResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
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| 225 | }
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| 226 | }
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| 227 |
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| 228 | return Status;
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| 229 | }
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| 230 |
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| 231 | /**
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| 232 | Returns if the capsule can be supported via UpdateCapsule().
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| 233 | Notice: When PcdCapsuleInRamSupport is unsupported, even this routine returns a valid answer,
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| 234 | the capsule still is unsupported via UpdateCapsule().
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| 235 |
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| 236 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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| 237 | being passed into update capsule.
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| 238 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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| 239 | CaspuleHeaderArray.
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| 240 | @param MaxiumCapsuleSize On output the maximum size that UpdateCapsule() can
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| 241 | support as an argument to UpdateCapsule() via
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| 242 | CapsuleHeaderArray and ScatterGatherList.
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| 243 | @param ResetType Returns the type of reset required for the capsule update.
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| 244 |
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| 245 | @retval EFI_SUCCESS Valid answer returned.
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| 246 | @retval EFI_UNSUPPORTED The capsule image is not supported on this platform, and
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| 247 | MaximumCapsuleSize and ResetType are undefined.
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| 248 | @retval EFI_INVALID_PARAMETER MaximumCapsuleSize is NULL, or ResetTyep is NULL,
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| 249 | Or CapsuleCount is Zero, or CapsuleImage is not valid.
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| 250 |
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| 251 | **/
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| 252 | EFI_STATUS
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| 253 | EFIAPI
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| 254 | QueryCapsuleCapabilities (
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| 255 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
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| 256 | IN UINTN CapsuleCount,
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| 257 | OUT UINT64 *MaxiumCapsuleSize,
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| 258 | OUT EFI_RESET_TYPE *ResetType
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| 259 | )
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| 260 | {
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| 261 | EFI_STATUS Status;
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| 262 | UINTN ArrayNumber;
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| 263 | EFI_CAPSULE_HEADER *CapsuleHeader;
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| 264 | BOOLEAN NeedReset;
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| 265 |
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| 266 | //
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| 267 | // Capsule Count can't be less than one.
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| 268 | //
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| 269 | if (CapsuleCount < 1) {
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| 270 | return EFI_INVALID_PARAMETER;
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| 271 | }
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| 272 |
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| 273 | //
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| 274 | // Check whether input parameter is valid
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| 275 | //
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| 276 | if ((MaxiumCapsuleSize == NULL) || (ResetType == NULL)) {
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| 277 | return EFI_INVALID_PARAMETER;
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| 278 | }
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| 279 |
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| 280 | CapsuleHeader = NULL;
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| 281 | NeedReset = FALSE;
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| 282 |
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| 283 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 284 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 285 | //
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| 286 | // A capsule which has the CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE flag must have
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| 287 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 288 | //
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| 289 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE)) == CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) {
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| 290 | return EFI_INVALID_PARAMETER;
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| 291 | }
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| 292 |
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| 293 | //
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| 294 | // A capsule which has the CAPSULE_FLAGS_INITIATE_RESET flag must have
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| 295 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 296 | //
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| 297 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET)) == CAPSULE_FLAGS_INITIATE_RESET) {
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| 298 | return EFI_INVALID_PARAMETER;
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| 299 | }
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| 300 |
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| 301 | //
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| 302 | // Check FMP capsule flag
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| 303 | //
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| 304 | if ( CompareGuid (&CapsuleHeader->CapsuleGuid, &gEfiFmpCapsuleGuid)
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| 305 | && ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) != 0))
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| 306 | {
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| 307 | return EFI_INVALID_PARAMETER;
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| 308 | }
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| 309 |
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| 310 | //
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| 311 | // Check Capsule image without populate flag is supported by firmware
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| 312 | //
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| 313 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) == 0) {
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| 314 | Status = SupportCapsuleImage (CapsuleHeader);
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| 315 | if (EFI_ERROR (Status)) {
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| 316 | return Status;
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| 317 | }
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| 318 | }
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| 319 | }
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| 320 |
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| 321 | //
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| 322 | // Find out whether there is any capsule defined to persist across system reset.
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| 323 | //
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| 324 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 325 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 326 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_PERSIST_ACROSS_RESET) != 0) {
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| 327 | NeedReset = TRUE;
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| 328 | break;
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| 329 | }
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| 330 | }
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| 331 |
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| 332 | if (NeedReset) {
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| 333 | //
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| 334 | // Check if the platform supports update capsule across a system reset
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| 335 | //
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| 336 | if (!IsPersistAcrossResetCapsuleSupported ()) {
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| 337 | return EFI_UNSUPPORTED;
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| 338 | }
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| 339 |
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| 340 | *ResetType = EfiResetWarm;
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| 341 | *MaxiumCapsuleSize = (UINT64)mMaxSizePopulateCapsule;
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| 342 | } else {
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| 343 | //
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| 344 | // For non-reset capsule image.
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| 345 | //
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| 346 | *ResetType = EfiResetCold;
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| 347 | *MaxiumCapsuleSize = (UINT64)mMaxSizeNonPopulateCapsule;
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| 348 | }
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| 349 |
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| 350 | return EFI_SUCCESS;
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| 351 | }
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| 352 |
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| 353 | /**
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| 354 |
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| 355 | This code installs UEFI capsule runtime service.
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| 356 |
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| 357 | @param ImageHandle The firmware allocated handle for the EFI image.
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| 358 | @param SystemTable A pointer to the EFI System Table.
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| 359 |
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| 360 | @retval EFI_SUCCESS UEFI Capsule Runtime Services are installed successfully.
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| 361 |
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| 362 | **/
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| 363 | EFI_STATUS
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| 364 | EFIAPI
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| 365 | CapsuleServiceInitialize (
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| 366 | IN EFI_HANDLE ImageHandle,
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| 367 | IN EFI_SYSTEM_TABLE *SystemTable
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| 368 | )
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| 369 | {
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| 370 | EFI_STATUS Status;
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| 371 |
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| 372 | mMaxSizePopulateCapsule = PcdGet32 (PcdMaxSizePopulateCapsule);
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| 373 | mMaxSizeNonPopulateCapsule = PcdGet32 (PcdMaxSizeNonPopulateCapsule);
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| 374 |
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| 375 | //
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| 376 | // When PEI phase is IA32, DXE phase is X64, it is possible that capsule data are
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| 377 | // put above 4GB, so capsule PEI will transfer to long mode to get capsule data.
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| 378 | // The page table and stack is used to transfer processor mode from IA32 to long mode.
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| 379 | // Create the base address of page table and stack, and save them into variable.
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| 380 | // This is not needed when capsule with reset type is not supported.
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| 381 | //
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| 382 | SaveLongModeContext ();
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| 383 |
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| 384 | //
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| 385 | // Install capsule runtime services into UEFI runtime service tables.
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| 386 | //
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| 387 | gRT->UpdateCapsule = UpdateCapsule;
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| 388 | gRT->QueryCapsuleCapabilities = QueryCapsuleCapabilities;
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| 389 |
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| 390 | //
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| 391 | // Install the Capsule Architectural Protocol on a new handle
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| 392 | // to signify the capsule runtime services are ready.
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| 393 | //
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| 394 | Status = gBS->InstallMultipleProtocolInterfaces (
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| 395 | &mNewHandle,
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| 396 | &gEfiCapsuleArchProtocolGuid,
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| 397 | NULL,
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| 398 | NULL
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| 399 | );
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| 400 | ASSERT_EFI_ERROR (Status);
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| 401 |
|
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| 402 | return Status;
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|---|
| 403 | }
|
|---|
