| /**************************************************************************** |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2014 - 2020 Vivante Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| ***************************************************************************** |
| * |
| * The GPL License (GPL) |
| * |
| * Copyright (C) 2014 - 2020 Vivante Corporation |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * |
| ***************************************************************************** |
| * |
| * Note: This software is released under dual MIT and GPL licenses. A |
| * recipient may use this file under the terms of either the MIT license or |
| * GPL License. If you wish to use only one license not the other, you can |
| * indicate your decision by deleting one of the above license notices in your |
| * version of this file. |
| * |
| *****************************************************************************/ |
| |
| |
| #include "shared/gc_hal_types.h" |
| #include "gc_hal_base.h" |
| #include "gc_hal_security_interface.h" |
| #include "gc_hal_ta.h" |
| #include "gc_hal.h" |
| |
| #define _GC_OBJ_ZONE gcvZONE_KERNEL |
| |
| /* |
| * Responsibility of TA (trust application). |
| * 1) Start FE. |
| * When non secure driver asks for start FE. TA enable MMU and start FE. |
| * TA always execute MMU enable processes because it has no idea whether |
| * GPU has been power off. |
| * |
| * 2) Setup page table |
| * When non secure driver asks for set up GPU address to physical address |
| * mapping, TA check the attribute of physical address and attribute of |
| * GPU address to make sure they are match. Then it change page table. |
| * |
| */ |
| |
| gcTA_MMU SharedMmu = gcvNULL; |
| |
| /******************************************************************************* |
| ** |
| ** gcTA_Construct |
| ** |
| ** Construct a new gcTA object. |
| */ |
| int |
| gcTA_Construct( |
| IN gctaOS Os, |
| IN gceCORE Core, |
| OUT gcTA *TA |
| ) |
| { |
| gceSTATUS status; |
| gctPOINTER pointer; |
| gcTA ta = gcvNULL; |
| |
| gcmkHEADER(); |
| gcmkVERIFY_ARGUMENT(TA != gcvNULL); |
| |
| /* Construct a gcTA object. */ |
| gcmkONERROR(gctaOS_Allocate(sizeof(struct _gcTA), &pointer)); |
| |
| gctaOS_ZeroMemory(pointer, sizeof(struct _gcTA)); |
| |
| ta = (gcTA)pointer; |
| |
| ta->os = Os; |
| ta->core = Core; |
| |
| gcmkONERROR(gctaHARDWARE_Construct(ta, &ta->hardware)); |
| |
| if (gctaHARDWARE_IsFeatureAvailable(ta->hardware, gcvFEATURE_SECURITY)) |
| { |
| if (SharedMmu == gcvNULL) |
| { |
| gcmkONERROR(gctaMMU_Construct(ta, &ta->mmu)); |
| |
| /* Record shared MMU. */ |
| SharedMmu = ta->mmu; |
| ta->destoryMmu = gcvTRUE; |
| } |
| else |
| { |
| ta->mmu = SharedMmu; |
| ta->destoryMmu = gcvFALSE; |
| } |
| |
| gcmkONERROR(gctaHARDWARE_PrepareFunctions(ta->hardware)); |
| } |
| |
| *TA = ta; |
| |
| gcmkFOOTER_NO(); |
| return 0; |
| |
| OnError: |
| if (ta) |
| { |
| if (ta->mmu && ta->destoryMmu) |
| { |
| gcmkVERIFY_OK(gctaMMU_Destory(ta->mmu)); |
| } |
| |
| if (ta->hardware) |
| { |
| gcmkVERIFY_OK(gctaHARDWARE_Destroy(ta->hardware)); |
| } |
| |
| gcmkVERIFY_OK(gctaOS_Free(ta)); |
| } |
| gcmkFOOTER(); |
| return status; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** gcTA_Construct |
| ** |
| ** Destroy a gcTA object. |
| */ |
| int |
| gcTA_Destroy( |
| IN gcTA TA |
| ) |
| { |
| if (TA->mmu && TA->destoryMmu) |
| { |
| gcmkVERIFY_OK(gctaMMU_Destory(TA->mmu)); |
| } |
| |
| if (TA->hardware) |
| { |
| gcmkVERIFY_OK(gctaHARDWARE_Destroy(TA->hardware)); |
| } |
| |
| gcmkVERIFY_OK(gctaOS_Free(TA)); |
| |
| /* Destroy. */ |
| return 0; |
| } |
| |
| |
| /* |
| * Map a scatter gather list into gpu address space. |
| * |
| */ |
| gceSTATUS |
| gcTA_MapMemory( |
| IN gcTA TA, |
| IN gctUINT32 *PhysicalArray, |
| IN gctPHYS_ADDR_T Physical, |
| IN gctUINT32 PageCount, |
| OUT gctUINT32 *GPUAddress |
| ) |
| { |
| gceSTATUS status; |
| gcTA_MMU mmu; |
| gctUINT32 pageCount = PageCount; |
| gctUINT32 i; |
| gctUINT32 gpuAddress = *GPUAddress; |
| gctBOOL mtlbSecure = gcvFALSE; |
| gctBOOL physicalSecure = gcvFALSE; |
| |
| mmu = TA->mmu; |
| |
| /* Fill in page table. */ |
| for (i = 0; i < pageCount; i++) |
| { |
| gctUINT32 physical; |
| gctUINT32_PTR entry; |
| |
| if (PhysicalArray) |
| { |
| physical = PhysicalArray[i]; |
| } |
| else |
| { |
| physical = (gctUINT32)Physical + 4096 * i; |
| } |
| |
| gcmkONERROR(gctaMMU_GetPageEntry(mmu, gpuAddress, gcvNULL, &entry, &mtlbSecure)); |
| |
| status = gctaOS_IsPhysicalSecure(TA->os, physical, &physicalSecure); |
| |
| if (gcmIS_SUCCESS(status) && physicalSecure != mtlbSecure) |
| { |
| gcmkONERROR(gcvSTATUS_NOT_SUPPORTED); |
| } |
| |
| gctaMMU_SetPage(mmu, physical, entry); |
| |
| gpuAddress += 4096; |
| } |
| |
| return gcvSTATUS_OK; |
| |
| OnError: |
| return status; |
| } |
| |
| gceSTATUS |
| gcTA_UnmapMemory( |
| IN gcTA TA, |
| IN gctUINT32 GPUAddress, |
| IN gctUINT32 PageCount |
| ) |
| { |
| gceSTATUS status; |
| |
| gcmkONERROR(gctaMMU_FreePages(TA->mmu, GPUAddress, PageCount)); |
| |
| return gcvSTATUS_OK; |
| |
| OnError: |
| return status; |
| } |
| |
| gceSTATUS |
| gcTA_StartCommand( |
| IN gcTA TA, |
| IN gctUINT32 Address, |
| IN gctUINT32 Bytes |
| ) |
| { |
| gctaHARDWARE_Execute(TA, Address, Bytes); |
| return gcvSTATUS_OK; |
| } |
| |
| int |
| gcTA_Dispatch( |
| IN gcTA TA, |
| IN gcsTA_INTERFACE * Interface |
| ) |
| { |
| int command = Interface->command; |
| |
| gceSTATUS status = gcvSTATUS_OK; |
| |
| switch (command) |
| { |
| case KERNEL_START_COMMAND: |
| /* Enable MMU every time FE starts. |
| ** Because if normal world stop GPU and power off GPU, MMU states is reset. |
| */ |
| gcmkONERROR(gctaHARDWARE_SetMMU(TA->hardware, TA->mmu->mtlbLogical)); |
| |
| gcmkONERROR(gcTA_StartCommand( |
| TA, |
| Interface->u.StartCommand.address, |
| Interface->u.StartCommand.bytes |
| )); |
| break; |
| |
| case KERNEL_MAP_MEMORY: |
| gcmkONERROR(gcTA_MapMemory( |
| TA, |
| Interface->u.MapMemory.physicals, |
| Interface->u.MapMemory.physical, |
| Interface->u.MapMemory.pageCount, |
| &Interface->u.MapMemory.gpuAddress |
| )); |
| |
| break; |
| |
| case KERNEL_UNMAP_MEMORY: |
| status = gcTA_UnmapMemory( |
| TA, |
| Interface->u.UnmapMemory.gpuAddress, |
| Interface->u.UnmapMemory.pageCount |
| ); |
| break; |
| |
| case KERNEL_DUMP_MMU_EXCEPTION: |
| status = gctaHARDWARE_DumpMMUException(TA->hardware); |
| break; |
| |
| case KERNEL_HANDLE_MMU_EXCEPTION: |
| status = gctaHARDWARE_HandleMMUException( |
| TA->hardware, |
| Interface->u.HandleMMUException.mmuStatus, |
| Interface->u.HandleMMUException.physical, |
| Interface->u.HandleMMUException.gpuAddress |
| ); |
| break; |
| |
| case KERNEL_READ_MMU_EXCEPTION: |
| status = gctaHARDWARE_ReadMMUException( |
| TA->hardware, |
| &Interface->u.ReadMMUException.mmuStatus, |
| &Interface->u.ReadMMUException.mmuException |
| ); |
| break; |
| |
| default: |
| gcmkASSERT(0); |
| |
| status = gcvSTATUS_INVALID_ARGUMENT; |
| break; |
| } |
| |
| OnError: |
| Interface->result = status; |
| |
| return 0; |
| } |
| |
| |
| |