linux/drivers/gpu/drm/amd/amdgpu/imu_v12_1.c

/*
 * Copyright 2025 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 <linux/firmware.h>
#include "amdgpu.h"
#include "amdgpu_imu.h"
#include "amdgpu_dpm.h"

#include "imu_v12_1.h"

#include "gc/gc_12_1_0_offset.h"
#include "gc/gc_12_1_0_sh_mask.h"
#include "mmhub/mmhub_4_2_0_offset.h"

MODULE_FIRMWARE("amdgpu/gc_12_1_0_imu.bin");

#define TRANSFER_RAM_MASK	0x001c0000

static int imu_v12_1_init_microcode(struct amdgpu_device *adev)
{
	char ucode_prefix[15];
	int err;
	const struct imu_firmware_header_v1_0 *imu_hdr;
	struct amdgpu_firmware_info *info = NULL;

	DRM_DEBUG("\n");

	amdgpu_ucode_ip_version_decode(adev, GC_HWIP, ucode_prefix, sizeof(ucode_prefix));
	err = amdgpu_ucode_request(adev, &adev->gfx.imu_fw, AMDGPU_UCODE_REQUIRED,
				   "amdgpu/%s_imu.bin", ucode_prefix);
	if (err)
		goto out;

	imu_hdr = (const struct imu_firmware_header_v1_0 *)adev->gfx.imu_fw->data;
	adev->gfx.imu_fw_version = le32_to_cpu(imu_hdr->header.ucode_version);

	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
		info = &adev->firmware.ucode[AMDGPU_UCODE_ID_IMU_I];
		info->ucode_id = AMDGPU_UCODE_ID_IMU_I;
		info->fw = adev->gfx.imu_fw;
		adev->firmware.fw_size +=
			ALIGN(le32_to_cpu(imu_hdr->imu_iram_ucode_size_bytes), PAGE_SIZE);
		info = &adev->firmware.ucode[AMDGPU_UCODE_ID_IMU_D];
		info->ucode_id = AMDGPU_UCODE_ID_IMU_D;
		info->fw = adev->gfx.imu_fw;
		adev->firmware.fw_size +=
			ALIGN(le32_to_cpu(imu_hdr->imu_dram_ucode_size_bytes), PAGE_SIZE);
	}

out:
	if (err) {
		dev_err(adev->dev,
			"gfx12: Failed to load firmware \"%s_imu.bin\"\n",
			ucode_prefix);
		amdgpu_ucode_release(&adev->gfx.imu_fw);
	}

	return err;
}

static void imu_v12_1_xcc_load_microcode(struct amdgpu_device *adev,
					 int xcc_id)
{
	const struct imu_firmware_header_v1_0 *hdr;
	const __le32 *fw_data;
	unsigned i, fw_size;

	hdr = (const struct imu_firmware_header_v1_0 *)adev->gfx.imu_fw->data;
	fw_data = (const __le32 *)(adev->gfx.imu_fw->data +
			le32_to_cpu(hdr->header.ucode_array_offset_bytes));
	fw_size = le32_to_cpu(hdr->imu_iram_ucode_size_bytes) / 4;

	WREG32_SOC15(GC, GET_INST(GC, xcc_id), regGFX_IMU_I_RAM_ADDR, 0);

	for (i = 0; i < fw_size; i++)
		WREG32_SOC15(GC, GET_INST(GC, xcc_id),
			     regGFX_IMU_I_RAM_DATA,
			     le32_to_cpup(fw_data++));

	WREG32_SOC15(GC, GET_INST(GC, xcc_id),
		     regGFX_IMU_I_RAM_ADDR,
		     adev->gfx.imu_fw_version);

	fw_data = (const __le32 *)(adev->gfx.imu_fw->data +
			le32_to_cpu(hdr->header.ucode_array_offset_bytes) +
			le32_to_cpu(hdr->imu_iram_ucode_size_bytes));
	fw_size = le32_to_cpu(hdr->imu_dram_ucode_size_bytes) / 4;

	WREG32_SOC15(GC, GET_INST(GC, xcc_id), regGFX_IMU_D_RAM_ADDR, 0);

	for (i = 0; i < fw_size; i++)
		WREG32_SOC15(GC, GET_INST(GC, xcc_id),
			     regGFX_IMU_D_RAM_DATA,
			     le32_to_cpup(fw_data++));

	WREG32_SOC15(GC, GET_INST(GC, xcc_id),
		     regGFX_IMU_D_RAM_ADDR,
		     adev->gfx.imu_fw_version);
}

static int imu_v12_1_load_microcode(struct amdgpu_device *adev)
{
	int i, num_xcc;

	if (!adev->gfx.imu_fw)
		return -EINVAL;

	num_xcc = NUM_XCC(adev->gfx.xcc_mask);
	for (i = 0; i < num_xcc; i++) {
		imu_v12_1_xcc_load_microcode(adev, i);
	}

	return 0;
}

static int imu_v12_1_switch_compute_partition(struct amdgpu_device *adev,
					      int num_xccs_per_xcp,
					      int compute_partition_mode)
{
	int ret;

	if (adev->psp.funcs) {
		/*TODO: revisit asp interface once it's avaialble */
		ret = psp_spatial_partition(&adev->psp,
					    NUM_XCC(adev->gfx.xcc_mask) /
						    num_xccs_per_xcp);
		if (ret)
			return ret;
	}

	adev->gfx.num_xcc_per_xcp = num_xccs_per_xcp;

	return 0;
}

static void imu_v12_1_init_mcm_addr_lut(struct amdgpu_device *adev)
{
	/* todo: fill in when interface is ready */
}

const struct amdgpu_imu_funcs gfx_v12_1_imu_funcs = {
	.init_microcode = imu_v12_1_init_microcode,
	.load_microcode = imu_v12_1_load_microcode,
	.switch_compute_partition = imu_v12_1_switch_compute_partition,
	.init_mcm_addr_lut = imu_v12_1_init_mcm_addr_lut,
};