mirror of
https://github.com/revyos/thead-kernel.git
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349 lines
8.7 KiB
C
349 lines
8.7 KiB
C
/****************************************************************************
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 - 2021 Vivante Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************
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*
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* The GPL License (GPL)
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*
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* Copyright (C) 2014 - 2021 Vivante Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*****************************************************************************
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*
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* Note: This software is released under dual MIT and GPL licenses. A
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* recipient may use this file under the terms of either the MIT license or
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* GPL License. If you wish to use only one license not the other, you can
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* indicate your decision by deleting one of the above license notices in your
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* version of this file.
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*
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*****************************************************************************/
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#include "gc_hal_types.h"
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#include "gc_hal_base.h"
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#include "gc_hal_security_interface.h"
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#include "gc_hal_ta.h"
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#include "gc_hal.h"
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#define _GC_OBJ_ZONE gcvZONE_KERNEL
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/*
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* Responsibility of TA (trust application).
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* 1) Start FE.
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* When non secure driver asks for start FE. TA enable MMU and start FE.
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* TA always execute MMU enable processes because it has no idea whether
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* GPU has been power off.
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*
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* 2) Setup page table
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* When non secure driver asks for set up GPU address to physical address
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* mapping, TA check the attribute of physical address and attribute of
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* GPU address to make sure they are match. Then it change page table.
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*
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*/
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gcTA_MMU SharedMmu = gcvNULL;
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/*******************************************************************************
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**
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** gcTA_Construct
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**
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** Construct a new gcTA object.
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*/
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int
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gcTA_Construct(
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IN gctaOS Os,
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IN gceCORE Core,
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OUT gcTA *TA
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)
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{
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gceSTATUS status;
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gctPOINTER pointer;
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gcTA ta = gcvNULL;
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gcmkHEADER();
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gcmkVERIFY_ARGUMENT(TA != gcvNULL);
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/* Construct a gcTA object. */
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gcmkONERROR(gctaOS_Allocate(sizeof(struct _gcTA), &pointer));
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gctaOS_ZeroMemory(pointer, sizeof(struct _gcTA));
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ta = (gcTA)pointer;
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ta->os = Os;
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ta->core = Core;
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gcmkONERROR(gctaHARDWARE_Construct(ta, &ta->hardware));
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if (gctaHARDWARE_IsFeatureAvailable(ta->hardware, gcvFEATURE_SECURITY))
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{
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if (SharedMmu == gcvNULL)
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{
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gcmkONERROR(gctaMMU_Construct(ta, &ta->mmu));
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/* Record shared MMU. */
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SharedMmu = ta->mmu;
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ta->destoryMmu = gcvTRUE;
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}
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else
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{
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ta->mmu = SharedMmu;
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ta->destoryMmu = gcvFALSE;
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}
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gcmkONERROR(gctaHARDWARE_PrepareFunctions(ta->hardware));
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}
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*TA = ta;
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gcmkFOOTER_NO();
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return 0;
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OnError:
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if (ta)
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{
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if (ta->mmu && ta->destoryMmu)
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{
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gcmkVERIFY_OK(gctaMMU_Destory(ta->mmu));
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}
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if (ta->hardware)
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{
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gcmkVERIFY_OK(gctaHARDWARE_Destroy(ta->hardware));
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}
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gcmkVERIFY_OK(gctaOS_Free(ta));
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}
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gcmkFOOTER();
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return status;
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}
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/*******************************************************************************
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**
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** gcTA_Construct
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**
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** Destroy a gcTA object.
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*/
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int
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gcTA_Destroy(
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IN gcTA TA
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)
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{
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if (TA->mmu && TA->destoryMmu)
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{
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gcmkVERIFY_OK(gctaMMU_Destory(TA->mmu));
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}
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if (TA->hardware)
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{
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gcmkVERIFY_OK(gctaHARDWARE_Destroy(TA->hardware));
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}
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gcmkVERIFY_OK(gctaOS_Free(TA));
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/* Destroy. */
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return 0;
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}
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/*
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* Map a scatter gather list into gpu address space.
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*
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*/
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gceSTATUS
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gcTA_MapMemory(
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IN gcTA TA,
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IN gctUINT32 *PhysicalArray,
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IN gctPHYS_ADDR_T Physical,
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IN gctUINT32 PageCount,
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OUT gctUINT32 *GPUAddress
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)
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{
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gceSTATUS status;
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gcTA_MMU mmu;
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gctUINT32 pageCount = PageCount;
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gctUINT32 i;
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gctUINT32 gpuAddress = *GPUAddress;
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gctBOOL mtlbSecure = gcvFALSE;
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gctBOOL physicalSecure = gcvFALSE;
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mmu = TA->mmu;
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/* Fill in page table. */
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for (i = 0; i < pageCount; i++)
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{
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gctUINT32 physical;
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gctUINT32_PTR entry;
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if (PhysicalArray)
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{
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physical = PhysicalArray[i];
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}
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else
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{
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physical = (gctUINT32)Physical + 4096 * i;
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}
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gcmkONERROR(gctaMMU_GetPageEntry(mmu, gpuAddress, gcvNULL, &entry, &mtlbSecure));
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status = gctaOS_IsPhysicalSecure(TA->os, physical, &physicalSecure);
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if (gcmIS_SUCCESS(status) && physicalSecure != mtlbSecure)
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{
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gcmkONERROR(gcvSTATUS_NOT_SUPPORTED);
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}
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gctaMMU_SetPage(mmu, physical, entry);
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gpuAddress += 4096;
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}
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return gcvSTATUS_OK;
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OnError:
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return status;
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}
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gceSTATUS
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gcTA_UnmapMemory(
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IN gcTA TA,
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IN gctUINT32 GPUAddress,
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IN gctUINT32 PageCount
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)
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{
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gceSTATUS status;
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gcmkONERROR(gctaMMU_FreePages(TA->mmu, GPUAddress, PageCount));
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return gcvSTATUS_OK;
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OnError:
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return status;
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}
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gceSTATUS
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gcTA_StartCommand(
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IN gcTA TA,
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IN gctUINT32 Address,
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IN gctUINT32 Bytes
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)
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{
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gctaHARDWARE_Execute(TA, Address, Bytes);
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return gcvSTATUS_OK;
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}
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int
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gcTA_Dispatch(
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IN gcTA TA,
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IN gcsTA_INTERFACE * Interface
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)
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{
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int command = Interface->command;
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gceSTATUS status = gcvSTATUS_OK;
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switch (command)
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{
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case KERNEL_START_COMMAND:
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/* Enable MMU every time FE starts.
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** Because if normal world stop GPU and power off GPU, MMU states is reset.
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*/
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gcmkONERROR(gctaHARDWARE_SetMMU(TA->hardware, TA->mmu->mtlbLogical));
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gcmkONERROR(gcTA_StartCommand(
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TA,
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Interface->u.StartCommand.address,
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Interface->u.StartCommand.bytes
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));
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break;
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case KERNEL_MAP_MEMORY:
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gcmkONERROR(gcTA_MapMemory(
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TA,
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Interface->u.MapMemory.physicals,
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Interface->u.MapMemory.physical,
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Interface->u.MapMemory.pageCount,
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&Interface->u.MapMemory.gpuAddress
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));
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break;
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case KERNEL_UNMAP_MEMORY:
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status = gcTA_UnmapMemory(
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TA,
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Interface->u.UnmapMemory.gpuAddress,
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Interface->u.UnmapMemory.pageCount
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);
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break;
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case KERNEL_DUMP_MMU_EXCEPTION:
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status = gctaHARDWARE_DumpMMUException(TA->hardware);
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break;
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case KERNEL_HANDLE_MMU_EXCEPTION:
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status = gctaHARDWARE_HandleMMUException(
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TA->hardware,
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Interface->u.HandleMMUException.mmuStatus,
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Interface->u.HandleMMUException.physical,
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Interface->u.HandleMMUException.gpuAddress
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);
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break;
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case KERNEL_READ_MMU_EXCEPTION:
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status = gctaHARDWARE_ReadMMUException(
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TA->hardware,
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&Interface->u.ReadMMUException.mmuStatus,
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&Interface->u.ReadMMUException.mmuException
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);
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break;
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default:
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gcmkASSERT(0);
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status = gcvSTATUS_INVALID_ARGUMENT;
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break;
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}
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OnError:
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Interface->result = status;
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return 0;
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}
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