LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

   1/*
   2 * Copyright 2016 Advanced Micro Devices, Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 */
  23#include <drm/drmP.h>
  24#include <drm/amdgpu_drm.h>
  25#include "amdgpu.h"
  26#include "atomfirmware.h"
  27#include "amdgpu_atomfirmware.h"
  28#include "atom.h"
  29#include "atombios.h"
  30
  31#define get_index_into_master_table(master_table, table_name) (offsetof(struct master_table, table_name) / sizeof(uint16_t))
  32
  33bool amdgpu_atomfirmware_gpu_supports_virtualization(struct amdgpu_device *adev)
  34{
  35        int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
  36                                                firmwareinfo);
  37        uint16_t data_offset;
  38
  39        if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, NULL,
  40                                          NULL, NULL, &data_offset)) {
  41                struct atom_firmware_info_v3_1 *firmware_info =
  42                        (struct atom_firmware_info_v3_1 *)(adev->mode_info.atom_context->bios +
  43                                                           data_offset);
  44
  45                if (le32_to_cpu(firmware_info->firmware_capability) &
  46                    ATOM_FIRMWARE_CAP_GPU_VIRTUALIZATION)
  47                        return true;
  48        }
  49        return false;
  50}
  51
  52void amdgpu_atomfirmware_scratch_regs_init(struct amdgpu_device *adev)
  53{
  54        int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
  55                                                firmwareinfo);
  56        uint16_t data_offset;
  57
  58        if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, NULL,
  59                                          NULL, NULL, &data_offset)) {
  60                struct atom_firmware_info_v3_1 *firmware_info =
  61                        (struct atom_firmware_info_v3_1 *)(adev->mode_info.atom_context->bios +
  62                                                           data_offset);
  63
  64                adev->bios_scratch_reg_offset =
  65                        le32_to_cpu(firmware_info->bios_scratch_reg_startaddr);
  66        }
  67}
  68
  69void amdgpu_atomfirmware_scratch_regs_save(struct amdgpu_device *adev)
  70{
  71        int i;
  72
  73        for (i = 0; i < AMDGPU_BIOS_NUM_SCRATCH; i++)
  74                adev->bios_scratch[i] = RREG32(adev->bios_scratch_reg_offset + i);
  75}
  76
  77void amdgpu_atomfirmware_scratch_regs_restore(struct amdgpu_device *adev)
  78{
  79        int i;
  80
  81        /*
  82         * VBIOS will check ASIC_INIT_COMPLETE bit to decide if
  83         * execute ASIC_Init posting via driver
  84         */
  85        adev->bios_scratch[7] &= ~ATOM_S7_ASIC_INIT_COMPLETE_MASK;
  86
  87        for (i = 0; i < AMDGPU_BIOS_NUM_SCRATCH; i++)
  88                WREG32(adev->bios_scratch_reg_offset + i, adev->bios_scratch[i]);
  89}
  90
  91void amdgpu_atomfirmware_scratch_regs_engine_hung(struct amdgpu_device *adev,
  92                                                  bool hung)
  93{
  94        u32 tmp = RREG32(adev->bios_scratch_reg_offset + 3);
  95
  96        if (hung)
  97                tmp |= ATOM_S3_ASIC_GUI_ENGINE_HUNG;
  98        else
  99                tmp &= ~ATOM_S3_ASIC_GUI_ENGINE_HUNG;
 100
 101        WREG32(adev->bios_scratch_reg_offset + 3, tmp);
 102}
 103
 104int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev)
 105{
 106        struct atom_context *ctx = adev->mode_info.atom_context;
 107        int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
 108                                                vram_usagebyfirmware);
 109        uint16_t data_offset;
 110        int usage_bytes = 0;
 111
 112        if (amdgpu_atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) {
 113                struct vram_usagebyfirmware_v2_1 *firmware_usage =
 114                        (struct vram_usagebyfirmware_v2_1 *)(ctx->bios + data_offset);
 115
 116                DRM_DEBUG("atom firmware requested %08x %dkb fw %dkb drv\n",
 117                          le32_to_cpu(firmware_usage->start_address_in_kb),
 118                          le16_to_cpu(firmware_usage->used_by_firmware_in_kb),
 119                          le16_to_cpu(firmware_usage->used_by_driver_in_kb));
 120
 121                usage_bytes = le16_to_cpu(firmware_usage->used_by_driver_in_kb) * 1024;
 122        }
 123        ctx->scratch_size_bytes = 0;
 124        if (usage_bytes == 0)
 125                usage_bytes = 20 * 1024;
 126        /* allocate some scratch memory */
 127        ctx->scratch = kzalloc(usage_bytes, GFP_KERNEL);
 128        if (!ctx->scratch)
 129                return -ENOMEM;
 130        ctx->scratch_size_bytes = usage_bytes;
 131        return 0;
 132}
 133