/*
 * 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/drmP.h>
#include <drm/amdgpu_drm.h>
#include "amdgpu.h"
#include "atomfirmware.h"
#include "amdgpu_atomfirmware.h"
#include "atom.h"
#include "atombios.h"

#define get_index_into_master_table(master_table, table_name) (offsetof(struct master_table, table_name) / sizeof(uint16_t))

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->fw_vram_usage.start_offset = (start_addr &
				(~ATOM_VRAM_OPERATION_FLAGS_MASK)) << 10;
			adev->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;
};

union umc_info {
	struct atom_umc_info_v3_1 v31;
};
/*
 * Return vram width from integrated system info table, if available,
 * or 0 if not.
 */
int amdgpu_atomfirmware_get_vram_width(struct amdgpu_device *adev)
{
	struct amdgpu_mode_info *mode_info = &adev->mode_info;
	int index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
						integratedsysteminfo);
	u16 data_offset, size;
	union igp_info *igp_info;
	u8 frev, crev;

	/* get any igp specific overrides */
	if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, &size,
				   &frev, &crev, &data_offset)) {
		igp_info = (union igp_info *)
			(mode_info->atom_context->bios + data_offset);
		switch (crev) {
		case 11:
			return igp_info->v11.umachannelnumber * 64;
		default:
			return 0;
		}
	}

	return 0;
}

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_HBM:
			vram_type = AMDGPU_VRAM_TYPE_HBM;
			break;
		default:
			vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
			break;
		}
	}

	return vram_type;
}
/*
 * Return vram type from either integrated system info table
 * or umc info table, if available, or 0 (TYPE_UNKNOWN) if not
 */
int amdgpu_atomfirmware_get_vram_type(struct amdgpu_device *adev)
{
	struct amdgpu_mode_info *mode_info = &adev->mode_info;
	int index;
	u16 data_offset, size;
	union igp_info *igp_info;
	union umc_info *umc_info;
	u8 frev, crev;
	u8 mem_type;

	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,
						    umc_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_type = igp_info->v11.memorytype;
				return convert_atom_mem_type_to_vram_type(adev, mem_type);
			default:
				return 0;
			}
		} else {
			umc_info = (union umc_info *)
				(mode_info->atom_context->bios + data_offset);
			switch (crev) {
			case 1:
				mem_type = umc_info->v31.vram_type;
				return convert_atom_mem_type_to_vram_type(adev, mem_type);
			default:
				return 0;
			}
		}
	}

	return 0;
}

union firmware_info {
	struct atom_firmware_info_v3_1 v31;
};

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.gc_num_se;
			adev->gfx.config.max_cu_per_sh = gfx_info->v24.gc_num_cu_per_sh;
			adev->gfx.config.max_sh_per_se = gfx_info->v24.gc_num_sh_per_se;
			adev->gfx.config.max_backends_per_se = gfx_info->v24.gc_num_rb_per_se;
			adev->gfx.config.max_texture_channel_caches = gfx_info->v24.gc_num_tccs;
			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;
}