path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c

/*
 * 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.
 *
 * Author: Huang Rui
 *
 */

#include <linux/firmware.h>
#include <drm/drmP.h>
#include "amdgpu.h"
#include "amdgpu_psp.h"
#include "amdgpu_ucode.h"
#include "soc15_common.h"
#include "psp_v3_1.h"
#include "psp_v10_0.h"
#include "psp_v11_0.h"

static void psp_set_funcs(struct amdgpu_device *adev);

static int psp_early_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	psp_set_funcs(adev);

	return 0;
}

static int psp_sw_init(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
	struct psp_context *psp = &adev->psp;
	int ret;

	switch (adev->asic_type) {
	case CHIP_VEGA10:
	case CHIP_VEGA12:
		psp_v3_1_set_psp_funcs(psp);
		break;
	case CHIP_RAVEN:
		psp_v10_0_set_psp_funcs(psp);
		break;
	case CHIP_VEGA20:
		psp_v11_0_set_psp_funcs(psp);
		break;
	default:
		return -EINVAL;
	}

	psp->adev = adev;

	ret = psp_init_microcode(psp);
	if (ret) {
		DRM_ERROR("Failed to load psp firmware!\n");
		return ret;
	}

	return 0;
}

static int psp_sw_fini(void *handle)
{
	struct amdgpu_device *adev = (struct amdgpu_device *)handle;

	release_firmware(adev->psp.sos_fw);
	adev->psp.sos_fw = NULL;
	release_firmware(adev->psp.asd_fw);
	adev->psp.asd_fw = NULL;
	if (adev->psp.ta_fw) {
		release_firmware(adev->psp.ta_fw);
		adev->psp.ta_fw = NULL;
	}
	return 0;
}

int psp_wait_for(struct psp_context *psp, uint32_t reg_index,
		 uint32_t reg_val, uint32_t mask, bool check_changed)
{
	uint32_t val;
	int i;
	struct amdgpu_device *adev = psp->adev;

	for (i = 0; i < adev->usec_timeout; i++) {
		val = RREG32(reg_index);
		if (check_changed) {
			if (val != reg_val)
				return 0;
		} else {
			if ((val & mask) == reg_val)
				return 0;
		}
		udelay(1);
	}

	return -ETIME;
}

static int
psp_cmd_submit_buf(struct psp_context *psp,
		   struct amdgpu_firmware_info *ucode,
		   struct psp_gfx_cmd_resp *cmd, uint64_t fence_mc_addr)
{
	int ret;
	int index;
	int timeout = 2000;

	memset(psp->cmd_buf_mem, 0, PSP_CMD_BUFFER_SIZE);

	memcpy(psp->cmd_buf_mem, cmd, sizeof(struct psp_gfx_cmd_resp));

	index = atomic_inc_return(&psp->fence_value);
	ret = psp_cmd_submit(psp, ucode, psp->cmd_buf_mc_addr,
			     fence_mc_addr, index);
	if (ret) {
		atomic_dec(&psp->fence_value);
		return ret;
	}

	while (*((unsigned int *)psp->fence_buf) != index) {
		if (--timeout == 0)
			return -EINVAL;
		msleep(1);
	}

	/* In some cases, psp response status is not 0 even there is no
	 * problem while the command is submitted. Some version of PSP FW
	 * doesn't write 0 to that field.
	 * So here we would like to only print a warning instead of an error
	 * during psp initialization to avoid breaking hw_init and it doesn't
	 * return -EINVAL.
	 */
	if (psp->cmd_buf_mem->resp.status) {
		if (ucode)
			DRM_WARN("failed to load ucode id (%d) ",
				  ucode->ucode_id);
		DRM_WARN("psp command failed and response status is (%d)\n",
			  psp->cmd_buf_mem->resp.status);
	}

	/* get xGMI session id from response buffer */
	cmd