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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c598
1 files changed, 598 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
new file mode 100644
index 000000000..b4df6460e
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -0,0 +1,598 @@
+/*
+ * Copyright 2016 Advanced Micro Devices, Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ */
+
+#include <drm/amdgpu_drm.h>
+#include "amdgpu.h"
+#include "atomfirmware.h"
+#include "amdgpu_atomfirmware.h"
+#include "atom.h"
+#include "atombios.h"
+#include "soc15_hw_ip.h"
+
+bool amdgpu_atomfirmware_gpu_supports_virtualization(struct amdgpu_device *adev)
+{
+ int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+ uint16_t data_offset;
+
+ if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, NULL,
+ NULL, NULL, &data_offset)) {
+ struct atom_firmware_info_v3_1 *firmware_info =
+ (struct atom_firmware_info_v3_1 *)(adev->mode_info.atom_context->bios +
+ data_offset);
+
+ if (le32_to_cpu(firmware_info->firmware_capability) &
+ ATOM_FIRMWARE_CAP_GPU_VIRTUALIZATION)
+ return true;
+ }
+ return false;
+}
+
+void amdgpu_atomfirmware_scratch_regs_init(struct amdgpu_device *adev)
+{
+ int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+ uint16_t data_offset;
+
+ if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, NULL,
+ NULL, NULL, &data_offset)) {
+ struct atom_firmware_info_v3_1 *firmware_info =
+ (struct atom_firmware_info_v3_1 *)(adev->mode_info.atom_context->bios +
+ data_offset);
+
+ adev->bios_scratch_reg_offset =
+ le32_to_cpu(firmware_info->bios_scratch_reg_startaddr);
+ }
+}
+
+int amdgpu_atomfirmware_allocate_fb_scratch(struct amdgpu_device *adev)
+{
+ struct atom_context *ctx = adev->mode_info.atom_context;
+ int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ vram_usagebyfirmware);
+ struct vram_usagebyfirmware_v2_1 * firmware_usage;
+ uint32_t start_addr, size;
+ uint16_t data_offset;
+ int usage_bytes = 0;
+
+ if (amdgpu_atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) {
+ firmware_usage = (struct vram_usagebyfirmware_v2_1 *)(ctx->bios + data_offset);
+ DRM_DEBUG("atom firmware requested %08x %dkb fw %dkb drv\n",
+ le32_to_cpu(firmware_usage->start_address_in_kb),
+ le16_to_cpu(firmware_usage->used_by_firmware_in_kb),
+ le16_to_cpu(firmware_usage->used_by_driver_in_kb));
+
+ start_addr = le32_to_cpu(firmware_usage->start_address_in_kb);
+ size = le16_to_cpu(firmware_usage->used_by_firmware_in_kb);
+
+ if ((uint32_t)(start_addr & ATOM_VRAM_OPERATION_FLAGS_MASK) ==
+ (uint32_t)(ATOM_VRAM_BLOCK_SRIOV_MSG_SHARE_RESERVATION <<
+ ATOM_VRAM_OPERATION_FLAGS_SHIFT)) {
+ /* Firmware request VRAM reservation for SR-IOV */
+ adev->mman.fw_vram_usage_start_offset = (start_addr &
+ (~ATOM_VRAM_OPERATION_FLAGS_MASK)) << 10;
+ adev->mman.fw_vram_usage_size = size << 10;
+ /* Use the default scratch size */
+ usage_bytes = 0;
+ } else {
+ usage_bytes = le16_to_cpu(firmware_usage->used_by_driver_in_kb) << 10;
+ }
+ }
+ ctx->scratch_size_bytes = 0;
+ if (usage_bytes == 0)
+ usage_bytes = 20 * 1024;
+ /* allocate some scratch memory */
+ ctx->scratch = kzalloc(usage_bytes, GFP_KERNEL);
+ if (!ctx->scratch)
+ return -ENOMEM;
+ ctx->scratch_size_bytes = usage_bytes;
+ return 0;
+}
+
+union igp_info {
+ struct atom_integrated_system_info_v1_11 v11;
+ struct atom_integrated_system_info_v1_12 v12;
+};
+
+union umc_info {
+ struct atom_umc_info_v3_1 v31;
+};
+
+union vram_info {
+ struct atom_vram_info_header_v2_3 v23;
+ struct atom_vram_info_header_v2_4 v24;
+ struct atom_vram_info_header_v2_5 v25;
+};
+
+union vram_module {
+ struct atom_vram_module_v9 v9;
+ struct atom_vram_module_v10 v10;
+ struct atom_vram_module_v11 v11;
+};
+
+static int convert_atom_mem_type_to_vram_type(struct amdgpu_device *adev,
+ int atom_mem_type)
+{
+ int vram_type;
+
+ if (adev->flags & AMD_IS_APU) {
+ switch (atom_mem_type) {
+ case Ddr2MemType:
+ case LpDdr2MemType:
+ vram_type = AMDGPU_VRAM_TYPE_DDR2;
+ break;
+ case Ddr3MemType:
+ case LpDdr3MemType:
+ vram_type = AMDGPU_VRAM_TYPE_DDR3;
+ break;
+ case Ddr4MemType:
+ case LpDdr4MemType:
+ vram_type = AMDGPU_VRAM_TYPE_DDR4;
+ break;
+ default:
+ vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
+ break;
+ }
+ } else {
+ switch (atom_mem_type) {
+ case ATOM_DGPU_VRAM_TYPE_GDDR5:
+ vram_type = AMDGPU_VRAM_TYPE_GDDR5;
+ break;
+ case ATOM_DGPU_VRAM_TYPE_HBM2:
+ vram_type = AMDGPU_VRAM_TYPE_HBM;
+ break;
+ case ATOM_DGPU_VRAM_TYPE_GDDR6:
+ vram_type = AMDGPU_VRAM_TYPE_GDDR6;
+ break;
+ default:
+ vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
+ break;
+ }
+ }
+
+ return vram_type;
+}
+
+
+int
+amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
+ int *vram_width, int *vram_type,
+ int *vram_vendor)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ int index, i = 0;
+ u16 data_offset, size;
+ union igp_info *igp_info;
+ union vram_info *vram_info;
+ union vram_module *vram_module;
+ u8 frev, crev;
+ u8 mem_type;
+ u8 mem_vendor;
+ u32 mem_channel_number;
+ u32 mem_channel_width;
+ u32 module_id;
+
+ if (adev->flags & AMD_IS_APU)
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ integratedsysteminfo);
+ else
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ vram_info);
+
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context,
+ index, &size,
+ &frev, &crev, &data_offset)) {
+ if (adev->flags & AMD_IS_APU) {
+ igp_info = (union igp_info *)
+ (mode_info->atom_context->bios + data_offset);
+ switch (crev) {
+ case 11:
+ mem_channel_number = igp_info->v11.umachannelnumber;
+ /* channel width is 64 */
+ if (vram_width)
+ *vram_width = mem_channel_number * 64;
+ mem_type = igp_info->v11.memorytype;
+ if (vram_type)
+ *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+ break;
+ case 12:
+ mem_channel_number = igp_info->v12.umachannelnumber;
+ /* channel width is 64 */
+ if (vram_width)
+ *vram_width = mem_channel_number * 64;
+ mem_type = igp_info->v12.memorytype;
+ if (vram_type)
+ *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ vram_info = (union vram_info *)
+ (mode_info->atom_context->bios + data_offset);
+ module_id = (RREG32(adev->bios_scratch_reg_offset + 4) & 0x00ff0000) >> 16;
+ switch (crev) {
+ case 3:
+ if (module_id > vram_info->v23.vram_module_num)
+ module_id = 0;
+ vram_module = (union vram_module *)vram_info->v23.vram_module;
+ while (i < module_id) {
+ vram_module = (union vram_module *)
+ ((u8 *)vram_module + vram_module->v9.vram_module_size);
+ i++;
+ }
+ mem_type = vram_module->v9.memory_type;
+ if (vram_type)
+ *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+ mem_channel_number = vram_module->v9.channel_num;
+ mem_channel_width = vram_module->v9.channel_width;
+ if (vram_width)
+ *vram_width = mem_channel_number * (1 << mem_channel_width);
+ mem_vendor = (vram_module->v9.vender_rev_id) & 0xF;
+ if (vram_vendor)
+ *vram_vendor = mem_vendor;
+ break;
+ case 4:
+ if (module_id > vram_info->v24.vram_module_num)
+ module_id = 0;
+ vram_module = (union vram_module *)vram_info->v24.vram_module;
+ while (i < module_id) {
+ vram_module = (union vram_module *)
+ ((u8 *)vram_module + vram_module->v10.vram_module_size);
+ i++;
+ }
+ mem_type = vram_module->v10.memory_type;
+ if (vram_type)
+ *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+ mem_channel_number = vram_module->v10.channel_num;
+ mem_channel_width = vram_module->v10.channel_width;
+ if (vram_width)
+ *vram_width = mem_channel_number * (1 << mem_channel_width);
+ mem_vendor = (vram_module->v10.vender_rev_id) & 0xF;
+ if (vram_vendor)
+ *vram_vendor = mem_vendor;
+ break;
+ case 5:
+ if (module_id > vram_info->v25.vram_module_num)
+ module_id = 0;
+ vram_module = (union vram_module *)vram_info->v25.vram_module;
+ while (i < module_id) {
+ vram_module = (union vram_module *)
+ ((u8 *)vram_module + vram_module->v11.vram_module_size);
+ i++;
+ }
+ mem_type = vram_module->v11.memory_type;
+ if (vram_type)
+ *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type);
+ mem_channel_number = vram_module->v11.channel_num;
+ mem_channel_width = vram_module->v11.channel_width;
+ if (vram_width)
+ *vram_width = mem_channel_number * (1 << mem_channel_width);
+ mem_vendor = (vram_module->v11.vender_rev_id) & 0xF;
+ if (vram_vendor)
+ *vram_vendor = mem_vendor;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ }
+
+ return 0;
+}
+
+/*
+ * Return true if vbios enabled ecc by default, if umc info table is available
+ * or false if ecc is not enabled or umc info table is not available
+ */
+bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ int index;
+ u16 data_offset, size;
+ union umc_info *umc_info;
+ u8 frev, crev;
+ bool ecc_default_enabled = false;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ umc_info);
+
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context,
+ index, &size, &frev, &crev, &data_offset)) {
+ /* support umc_info 3.1+ */
+ if ((frev == 3 && crev >= 1) || (frev > 3)) {
+ umc_info = (union umc_info *)
+ (mode_info->atom_context->bios + data_offset);
+ ecc_default_enabled =
+ (le32_to_cpu(umc_info->v31.umc_config) &
+ UMC_CONFIG__DEFAULT_MEM_ECC_ENABLE) ? true : false;
+ }
+ }
+
+ return ecc_default_enabled;
+}
+
+union firmware_info {
+ struct atom_firmware_info_v3_1 v31;
+ struct atom_firmware_info_v3_2 v32;
+ struct atom_firmware_info_v3_3 v33;
+ struct atom_firmware_info_v3_4 v34;
+};
+
+/*
+ * Return true if vbios supports sram ecc or false if not
+ */
+bool amdgpu_atomfirmware_sram_ecc_supported(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ int index;
+ u16 data_offset, size;
+ union firmware_info *firmware_info;
+ u8 frev, crev;
+ bool sram_ecc_supported = false;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+
+ if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context,
+ index, &size, &frev, &crev, &data_offset)) {
+ /* support firmware_info 3.1 + */
+ if ((frev == 3 && crev >=1) || (frev > 3)) {
+ firmware_info = (union firmware_info *)
+ (mode_info->atom_context->bios + data_offset);
+ sram_ecc_supported =
+ (le32_to_cpu(firmware_info->v31.firmware_capability) &
+ ATOM_FIRMWARE_CAP_SRAM_ECC) ? true : false;
+ }
+ }
+
+ return sram_ecc_supported;
+}
+
+union smu_info {
+ struct atom_smu_info_v3_1 v31;
+};
+
+int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ struct amdgpu_pll *spll = &adev->clock.spll;
+ struct amdgpu_pll *mpll = &adev->clock.mpll;
+ uint8_t frev, crev;
+ uint16_t data_offset;
+ int ret = -EINVAL, index;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,
+ &frev, &crev, &data_offset)) {
+ union firmware_info *firmware_info =
+ (union firmware_info *)(mode_info->atom_context->bios +
+ data_offset);
+
+ adev->clock.default_sclk =
+ le32_to_cpu(firmware_info->v31.bootup_sclk_in10khz);
+ adev->clock.default_mclk =
+ le32_to_cpu(firmware_info->v31.bootup_mclk_in10khz);
+
+ adev->pm.current_sclk = adev->clock.default_sclk;
+ adev->pm.current_mclk = adev->clock.default_mclk;
+
+ /* not technically a clock, but... */
+ adev->mode_info.firmware_flags =
+ le32_to_cpu(firmware_info->v31.firmware_capability);
+
+ ret = 0;
+ }
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ smu_info);
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,
+ &frev, &crev, &data_offset)) {
+ union smu_info *smu_info =
+ (union smu_info *)(mode_info->atom_context->bios +
+ data_offset);
+
+ /* system clock */
+ spll->reference_freq = le32_to_cpu(smu_info->v31.core_refclk_10khz);
+
+ spll->reference_div = 0;
+ spll->min_post_div = 1;
+ spll->max_post_div = 1;
+ spll->min_ref_div = 2;
+ spll->max_ref_div = 0xff;
+ spll->min_feedback_div = 4;
+ spll->max_feedback_div = 0xff;
+ spll->best_vco = 0;
+
+ ret = 0;
+ }
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ umc_info);
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,
+ &frev, &crev, &data_offset)) {
+ union umc_info *umc_info =
+ (union umc_info *)(mode_info->atom_context->bios +
+ data_offset);
+
+ /* memory clock */
+ mpll->reference_freq = le32_to_cpu(umc_info->v31.mem_refclk_10khz);
+
+ mpll->reference_div = 0;
+ mpll->min_post_div = 1;
+ mpll->max_post_div = 1;
+ mpll->min_ref_div = 2;
+ mpll->max_ref_div = 0xff;
+ mpll->min_feedback_div = 4;
+ mpll->max_feedback_div = 0xff;
+ mpll->best_vco = 0;
+
+ ret = 0;
+ }
+
+ return ret;
+}
+
+union gfx_info {
+ struct atom_gfx_info_v2_4 v24;
+};
+
+int amdgpu_atomfirmware_get_gfx_info(struct amdgpu_device *adev)
+{
+ struct amdgpu_mode_info *mode_info = &adev->mode_info;
+ int index;
+ uint8_t frev, crev;
+ uint16_t data_offset;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ gfx_info);
+ if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,
+ &frev, &crev, &data_offset)) {
+ union gfx_info *gfx_info = (union gfx_info *)
+ (mode_info->atom_context->bios + data_offset);
+ switch (crev) {
+ case 4:
+ adev->gfx.config.max_shader_engines = gfx_info->v24.max_shader_engines;
+ adev->gfx.config.max_cu_per_sh = gfx_info->v24.max_cu_per_sh;
+ adev->gfx.config.max_sh_per_se = gfx_info->v24.max_sh_per_se;
+ adev->gfx.config.max_backends_per_se = gfx_info->v24.max_backends_per_se;
+ adev->gfx.config.max_texture_channel_caches = gfx_info->v24.max_texture_channel_caches;
+ adev->gfx.config.max_gprs = le16_to_cpu(gfx_info->v24.gc_num_gprs);
+ adev->gfx.config.max_gs_threads = gfx_info->v24.gc_num_max_gs_thds;
+ adev->gfx.config.gs_vgt_table_depth = gfx_info->v24.gc_gs_table_depth;
+ adev->gfx.config.gs_prim_buffer_depth =
+ le16_to_cpu(gfx_info->v24.gc_gsprim_buff_depth);
+ adev->gfx.config.double_offchip_lds_buf =
+ gfx_info->v24.gc_double_offchip_lds_buffer;
+ adev->gfx.cu_info.wave_front_size = le16_to_cpu(gfx_info->v24.gc_wave_size);
+ adev->gfx.cu_info.max_waves_per_simd = le16_to_cpu(gfx_info->v24.gc_max_waves_per_simd);
+ adev->gfx.cu_info.max_scratch_slots_per_cu = gfx_info->v24.gc_max_scratch_slots_per_cu;
+ adev->gfx.cu_info.lds_size = le16_to_cpu(gfx_info->v24.gc_lds_size);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+
+ }
+ return -EINVAL;
+}
+
+/*
+ * Check if VBIOS supports GDDR6 training data save/restore
+ */
+static bool gddr6_mem_train_vbios_support(struct amdgpu_device *adev)
+{
+ uint16_t data_offset;
+ int index;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+ if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, index, NULL,
+ NULL, NULL, &data_offset)) {
+ struct atom_firmware_info_v3_1 *firmware_info =
+ (struct atom_firmware_info_v3_1 *)(adev->mode_info.atom_context->bios +
+ data_offset);
+
+ DRM_DEBUG("atom firmware capability:0x%08x.\n",
+ le32_to_cpu(firmware_info->firmware_capability));
+
+ if (le32_to_cpu(firmware_info->firmware_capability) &
+ ATOM_FIRMWARE_CAP_ENABLE_2STAGE_BIST_TRAINING)
+ return true;
+ }
+
+ return false;
+}
+
+int amdgpu_mem_train_support(struct amdgpu_device *adev)
+{
+ int ret;
+ uint32_t major, minor, revision, hw_v;
+
+ if (gddr6_mem_train_vbios_support(adev)) {
+ amdgpu_discovery_get_ip_version(adev, MP0_HWID, &major, &minor, &revision);
+ hw_v = HW_REV(major, minor, revision);
+ /*
+ * treat 0 revision as a special case since register for MP0 and MMHUB is missing
+ * for some Navi10 A0, preventing driver from discovering the hwip information since
+ * none of the functions will be initialized, it should not cause any problems
+ */
+ switch (hw_v) {
+ case HW_REV(11, 0, 0):
+ case HW_REV(11, 0, 5):
+ case HW_REV(11, 0, 7):
+ case HW_REV(11, 0, 11):
+ ret = 1;
+ break;
+ default:
+ DRM_ERROR("memory training vbios supports but psp hw(%08x)"
+ " doesn't support!\n", hw_v);
+ ret = -1;
+ break;
+ }
+ } else {
+ ret = 0;
+ hw_v = -1;
+ }
+
+
+ DRM_DEBUG("mp0 hw_v %08x, ret:%d.\n", hw_v, ret);
+ return ret;
+}
+
+int amdgpu_atomfirmware_get_fw_reserved_fb_size(struct amdgpu_device *adev)
+{
+ struct atom_context *ctx = adev->mode_info.atom_context;
+ union firmware_info *firmware_info;
+ int index;
+ u16 data_offset, size;
+ u8 frev, crev;
+ int fw_reserved_fb_size;
+
+ index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+ firmwareinfo);
+
+ if (!amdgpu_atom_parse_data_header(ctx, index, &size,
+ &frev, &crev, &data_offset))
+ /* fail to parse data_header */
+ return 0;
+
+ firmware_info = (union firmware_info *)(ctx->bios + data_offset);
+
+ if (frev !=3)
+ return -EINVAL;
+
+ switch (crev) {
+ case 4:
+ fw_reserved_fb_size =
+ (firmware_info->v34.fw_reserved_size_in_kb << 10);
+ break;
+ default:
+ fw_reserved_fb_size = 0;
+ break;
+ }
+
+ return fw_reserved_fb_size;
+}