| 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 - 2013, Intel Corporation. All rights reserved.<BR>
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| 8 | This program and the accompanying materials
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| 9 | are licensed and made available under the terms and conditions of the BSD License
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| 10 | which accompanies this distribution. The full text of the license may be found at
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| 11 | http://opensource.org/licenses/bsd-license.php
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| 12 |
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| 13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 15 |
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| 16 | **/
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| 17 |
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| 18 | #include <Uefi.h>
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| 19 |
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| 20 | #include <Protocol/Capsule.h>
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| 21 | #include <Guid/CapsuleVendor.h>
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| 22 | #include <Guid/FmpCapsule.h>
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| 23 |
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| 24 | #include <Library/DebugLib.h>
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| 25 | #include <Library/PcdLib.h>
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| 26 | #include <Library/CapsuleLib.h>
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| 27 | #include <Library/UefiDriverEntryPoint.h>
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| 28 | #include <Library/UefiBootServicesTableLib.h>
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| 29 | #include <Library/UefiRuntimeServicesTableLib.h>
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| 30 | #include <Library/UefiRuntimeLib.h>
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| 31 | #include <Library/BaseLib.h>
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| 32 | #include <Library/PrintLib.h>
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| 33 | #include <Library/BaseMemoryLib.h>
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| 34 | //
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| 35 | // Handle for the installation of Capsule Architecture Protocol.
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| 36 | //
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| 37 | EFI_HANDLE mNewHandle = NULL;
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| 38 |
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| 39 | //
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| 40 | // The times of calling UpdateCapsule ()
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| 41 | //
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| 42 | UINTN mTimes = 0;
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| 43 |
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| 44 | UINT32 mMaxSizePopulateCapsule = 0;
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| 45 | UINT32 mMaxSizeNonPopulateCapsule = 0;
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| 46 |
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| 47 | /**
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| 48 | Create the variable to save the base address of page table and stack
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| 49 | for transferring into long mode in IA32 PEI.
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| 50 | **/
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| 51 | VOID
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| 52 | SaveLongModeContext (
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| 53 | VOID
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| 54 | );
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| 55 |
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| 56 | /**
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| 57 | Passes capsules to the firmware with both virtual and physical mapping. Depending on the intended
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| 58 | consumption, the firmware may process the capsule immediately. If the payload should persist
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| 59 | across a system reset, the reset value returned from EFI_QueryCapsuleCapabilities must
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| 60 | be passed into ResetSystem() and will cause the capsule to be processed by the firmware as
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| 61 | part of the reset process.
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| 62 |
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| 63 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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| 64 | being passed into update capsule.
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| 65 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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| 66 | CaspuleHeaderArray.
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| 67 | @param ScatterGatherList Physical pointer to a set of
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| 68 | EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the
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| 69 | location in physical memory of a set of capsules.
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| 70 |
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| 71 | @retval EFI_SUCCESS Valid capsule was passed. If
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| 72 | CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set, the
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| 73 | capsule has been successfully processed by the firmware.
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| 74 | @retval EFI_DEVICE_ERROR The capsule update was started, but failed due to a device error.
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| 75 | @retval EFI_INVALID_PARAMETER CapsuleSize is NULL, or an incompatible set of flags were
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| 76 | set in the capsule header.
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| 77 | @retval EFI_INVALID_PARAMETER CapsuleCount is Zero.
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| 78 | @retval EFI_INVALID_PARAMETER For across reset capsule image, ScatterGatherList is NULL.
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| 79 | @retval EFI_UNSUPPORTED CapsuleImage is not recognized by the firmware.
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| 80 | @retval EFI_OUT_OF_RESOURCES When ExitBootServices() has been previously called this error indicates the capsule
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| 81 | is compatible with this platform but is not capable of being submitted or processed
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| 82 | in runtime. The caller may resubmit the capsule prior to ExitBootServices().
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| 83 | @retval EFI_OUT_OF_RESOURCES When ExitBootServices() has not been previously called then this error indicates
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| 84 | the capsule is compatible with this platform but there are insufficient resources to process.
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| 85 |
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| 86 | **/
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| 87 | EFI_STATUS
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| 88 | EFIAPI
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| 89 | UpdateCapsule (
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| 90 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
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| 91 | IN UINTN CapsuleCount,
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| 92 | IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL
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| 93 | )
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| 94 | {
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| 95 | UINTN ArrayNumber;
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| 96 | EFI_STATUS Status;
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| 97 | EFI_CAPSULE_HEADER *CapsuleHeader;
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| 98 | BOOLEAN NeedReset;
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| 99 | BOOLEAN InitiateReset;
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| 100 | CHAR16 CapsuleVarName[30];
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| 101 | CHAR16 *TempVarName;
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| 102 |
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| 103 | //
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| 104 | // Capsule Count can't be less than one.
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| 105 | //
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| 106 | if (CapsuleCount < 1) {
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| 107 | return EFI_INVALID_PARAMETER;
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| 108 | }
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| 109 |
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| 110 | NeedReset = FALSE;
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| 111 | InitiateReset = FALSE;
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| 112 | CapsuleHeader = NULL;
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| 113 | CapsuleVarName[0] = 0;
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| 114 |
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| 115 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 116 | //
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| 117 | // A capsule which has the CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE flag must have
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| 118 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 119 | //
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| 120 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 121 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE)) == CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) {
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| 122 | return EFI_INVALID_PARAMETER;
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| 123 | }
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| 124 | //
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| 125 | // A capsule which has the CAPSULE_FLAGS_INITIATE_RESET flag must have
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| 126 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 127 | //
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| 128 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET)) == CAPSULE_FLAGS_INITIATE_RESET) {
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| 129 | return EFI_INVALID_PARAMETER;
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| 130 | }
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| 131 |
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| 132 | //
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| 133 | // Check FMP capsule flag
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| 134 | //
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| 135 | if (CompareGuid(&CapsuleHeader->CapsuleGuid, &gEfiFmpCapsuleGuid)
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| 136 | && (CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) != 0 ) {
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| 137 | return EFI_INVALID_PARAMETER;
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| 138 | }
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| 139 |
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| 140 | //
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| 141 | // Check Capsule image without populate flag by firmware support capsule function
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| 142 | //
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| 143 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) == 0) {
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| 144 | Status = SupportCapsuleImage (CapsuleHeader);
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| 145 | if (EFI_ERROR(Status)) {
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| 146 | return Status;
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| 147 | }
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| 148 | }
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| 149 | }
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| 150 |
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| 151 | //
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| 152 | // Walk through all capsules, record whether there is a capsule needs reset
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| 153 | // or initiate reset. And then process capsules which has no reset flag directly.
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| 154 | //
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| 155 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount ; ArrayNumber++) {
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| 156 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 157 | //
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| 158 | // Here should be in the boot-time for non-reset capsule image
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| 159 | // Platform specific update for the non-reset capsule image.
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| 160 | //
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| 161 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_PERSIST_ACROSS_RESET) == 0) {
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| 162 | if (EfiAtRuntime ()) {
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| 163 | Status = EFI_OUT_OF_RESOURCES;
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| 164 | } else {
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| 165 | Status = ProcessCapsuleImage(CapsuleHeader);
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| 166 | }
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| 167 | if (EFI_ERROR(Status)) {
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| 168 | return Status;
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| 169 | }
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| 170 | } else {
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| 171 | NeedReset = TRUE;
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| 172 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_INITIATE_RESET) != 0) {
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| 173 | InitiateReset = TRUE;
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| 174 | }
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | //
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| 179 | // After launching all capsules who has no reset flag, if no more capsules claims
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| 180 | // for a system reset just return.
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| 181 | //
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| 182 | if (!NeedReset) {
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| 183 | return EFI_SUCCESS;
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| 184 | }
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| 185 |
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| 186 | //
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| 187 | // ScatterGatherList is only referenced if the capsules are defined to persist across
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| 188 | // system reset.
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| 189 | //
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| 190 | if (ScatterGatherList == (EFI_PHYSICAL_ADDRESS) (UINTN) NULL) {
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| 191 | return EFI_INVALID_PARAMETER;
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| 192 | }
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| 193 |
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| 194 | //
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| 195 | // Check if the platform supports update capsule across a system reset
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| 196 | //
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| 197 | if (!FeaturePcdGet(PcdSupportUpdateCapsuleReset)) {
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| 198 | return EFI_UNSUPPORTED;
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| 199 | }
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| 200 |
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| 201 | //
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| 202 | // Construct variable name CapsuleUpdateData, CapsuleUpdateData1, CapsuleUpdateData2...
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| 203 | // if user calls UpdateCapsule multiple times.
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| 204 | //
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| 205 | StrCpy (CapsuleVarName, EFI_CAPSULE_VARIABLE_NAME);
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| 206 | TempVarName = CapsuleVarName + StrLen (CapsuleVarName);
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| 207 | if (mTimes > 0) {
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| 208 | UnicodeValueToString (TempVarName, 0, mTimes, 0);
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| 209 | }
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| 210 |
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| 211 | //
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| 212 | // ScatterGatherList is only referenced if the capsules are defined to persist across
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| 213 | // system reset. Set its value into NV storage to let pre-boot driver to pick it up
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| 214 | // after coming through a system reset.
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| 215 | //
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| 216 | Status = EfiSetVariable (
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| 217 | CapsuleVarName,
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| 218 | &gEfiCapsuleVendorGuid,
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| 219 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
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| 220 | sizeof (UINTN),
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| 221 | (VOID *) &ScatterGatherList
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| 222 | );
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| 223 | if (!EFI_ERROR (Status)) {
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| 224 | //
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| 225 | // Variable has been set successfully, increase variable index.
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| 226 | //
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| 227 | mTimes++;
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| 228 | if(InitiateReset) {
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| 229 | //
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| 230 | // Firmware that encounters a capsule which has the CAPSULE_FLAGS_INITIATE_RESET Flag set in its header
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| 231 | // will initiate a reset of the platform which is compatible with the passed-in capsule request and will
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| 232 | // not return back to the caller.
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| 233 | //
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| 234 | EfiResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
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| 235 | }
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| 236 | }
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| 237 | return Status;
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| 238 | }
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| 239 |
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| 240 | /**
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| 241 | Returns if the capsule can be supported via UpdateCapsule().
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| 242 |
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| 243 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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| 244 | being passed into update capsule.
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| 245 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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| 246 | CaspuleHeaderArray.
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| 247 | @param MaxiumCapsuleSize On output the maximum size that UpdateCapsule() can
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| 248 | support as an argument to UpdateCapsule() via
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| 249 | CapsuleHeaderArray and ScatterGatherList.
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| 250 | @param ResetType Returns the type of reset required for the capsule update.
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| 251 |
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| 252 | @retval EFI_SUCCESS Valid answer returned.
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| 253 | @retval EFI_UNSUPPORTED The capsule image is not supported on this platform, and
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| 254 | MaximumCapsuleSize and ResetType are undefined.
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| 255 | @retval EFI_INVALID_PARAMETER MaximumCapsuleSize is NULL, or ResetTyep is NULL,
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| 256 | Or CapsuleCount is Zero, or CapsuleImage is not valid.
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| 257 |
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| 258 | **/
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| 259 | EFI_STATUS
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| 260 | EFIAPI
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| 261 | QueryCapsuleCapabilities (
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| 262 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
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| 263 | IN UINTN CapsuleCount,
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| 264 | OUT UINT64 *MaxiumCapsuleSize,
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| 265 | OUT EFI_RESET_TYPE *ResetType
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| 266 | )
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| 267 | {
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| 268 | EFI_STATUS Status;
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| 269 | UINTN ArrayNumber;
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| 270 | EFI_CAPSULE_HEADER *CapsuleHeader;
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| 271 | BOOLEAN NeedReset;
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| 272 |
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| 273 | //
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| 274 | // Capsule Count can't be less than one.
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| 275 | //
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| 276 | if (CapsuleCount < 1) {
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| 277 | return EFI_INVALID_PARAMETER;
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| 278 | }
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| 279 |
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| 280 | //
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| 281 | // Check whether input parameter is valid
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| 282 | //
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| 283 | if ((MaxiumCapsuleSize == NULL) ||(ResetType == NULL)) {
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| 284 | return EFI_INVALID_PARAMETER;
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| 285 | }
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| 286 |
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| 287 | CapsuleHeader = NULL;
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| 288 | NeedReset = FALSE;
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| 289 |
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| 290 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
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| 291 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 292 | //
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| 293 | // A capsule which has the CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE flag must have
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| 294 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 295 | //
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| 296 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE)) == CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) {
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| 297 | return EFI_INVALID_PARAMETER;
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| 298 | }
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| 299 | //
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| 300 | // A capsule which has the CAPSULE_FLAGS_INITIATE_RESET flag must have
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| 301 | // CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
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| 302 | //
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| 303 | if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET)) == CAPSULE_FLAGS_INITIATE_RESET) {
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| 304 | return EFI_INVALID_PARAMETER;
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| 305 | }
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| 306 |
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| 307 | //
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| 308 | // Check FMP capsule flag
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| 309 | //
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| 310 | if (CompareGuid(&CapsuleHeader->CapsuleGuid, &gEfiFmpCapsuleGuid)
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| 311 | && (CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) != 0 ) {
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| 312 | return EFI_INVALID_PARAMETER;
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| 313 | }
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| 314 |
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| 315 | //
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| 316 | // Check Capsule image without populate flag is supported by firmware
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| 317 | //
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| 318 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) == 0) {
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| 319 | Status = SupportCapsuleImage (CapsuleHeader);
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| 320 | if (EFI_ERROR(Status)) {
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| 321 | return Status;
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| 322 | }
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| 323 | }
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| 324 | }
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| 325 |
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| 326 | //
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| 327 | // Find out whether there is any capsule defined to persist across system reset.
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| 328 | //
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| 329 | for (ArrayNumber = 0; ArrayNumber < CapsuleCount ; ArrayNumber++) {
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| 330 | CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
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| 331 | if ((CapsuleHeader->Flags & CAPSULE_FLAGS_PERSIST_ACROSS_RESET) != 0) {
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| 332 | NeedReset = TRUE;
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| 333 | break;
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| 334 | }
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| 335 | }
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| 336 |
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| 337 | if (NeedReset) {
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| 338 | //
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| 339 | //Check if the platform supports update capsule across a system reset
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| 340 | //
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| 341 | if (!FeaturePcdGet(PcdSupportUpdateCapsuleReset)) {
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| 342 | return EFI_UNSUPPORTED;
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| 343 | }
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| 344 | *ResetType = EfiResetWarm;
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| 345 | *MaxiumCapsuleSize = (UINT64) mMaxSizePopulateCapsule;
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| 346 | } else {
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| 347 | //
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| 348 | // For non-reset capsule image.
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| 349 | //
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| 350 | *ResetType = EfiResetCold;
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| 351 | *MaxiumCapsuleSize = (UINT64) mMaxSizeNonPopulateCapsule;
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| 352 | }
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| 353 |
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| 354 | return EFI_SUCCESS;
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| 355 | }
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| 356 |
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| 357 |
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| 358 | /**
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| 359 |
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| 360 | This code installs UEFI capsule runtime service.
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| 361 |
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| 362 | @param ImageHandle The firmware allocated handle for the EFI image.
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| 363 | @param SystemTable A pointer to the EFI System Table.
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| 364 |
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| 365 | @retval EFI_SUCCESS UEFI Capsule Runtime Services are installed successfully.
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| 366 |
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| 367 | **/
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| 368 | EFI_STATUS
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| 369 | EFIAPI
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| 370 | CapsuleServiceInitialize (
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| 371 | IN EFI_HANDLE ImageHandle,
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| 372 | IN EFI_SYSTEM_TABLE *SystemTable
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| 373 | )
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| 374 | {
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| 375 | EFI_STATUS Status;
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| 376 |
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| 377 | mMaxSizePopulateCapsule = PcdGet32(PcdMaxSizePopulateCapsule);
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| 378 | mMaxSizeNonPopulateCapsule = PcdGet32(PcdMaxSizeNonPopulateCapsule);
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| 379 |
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| 380 | //
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| 381 | // When PEI phase is IA32, DXE phase is X64, it is possible that capsule data are
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| 382 | // put above 4GB, so capsule PEI will transfer to long mode to get capsule data.
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| 383 | // The page table and stack is used to transfer processor mode from IA32 to long mode.
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| 384 | // Create the base address of page table and stack, and save them into variable.
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| 385 | // This is not needed when capsule with reset type is not supported.
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| 386 | //
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| 387 | SaveLongModeContext ();
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| 388 |
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| 389 | //
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| 390 | // Install capsule runtime services into UEFI runtime service tables.
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| 391 | //
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| 392 | gRT->UpdateCapsule = UpdateCapsule;
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| 393 | gRT->QueryCapsuleCapabilities = QueryCapsuleCapabilities;
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| 394 |
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| 395 | //
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| 396 | // Install the Capsule Architectural Protocol on a new handle
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| 397 | // to signify the capsule runtime services are ready.
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| 398 | //
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| 399 | Status = gBS->InstallMultipleProtocolInterfaces (
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| 400 | &mNewHandle,
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| 401 | &gEfiCapsuleArchProtocolGuid,
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| 402 | NULL,
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| 403 | NULL
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| 404 | );
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| 405 | ASSERT_EFI_ERROR (Status);
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| 406 |
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| 407 | return Status;
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| 408 | }
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