/* * Copyright 2021 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/debugfs.h>#include <linux/pm_runtime.h> #include "amdgpu.h"#include "amdgpu_securedisplay.h" /** * DOC: AMDGPU SECUREDISPLAY debugfs test interface * * how to use? * echo opcode <value> > <debugfs_dir>/dri/xxx/securedisplay_test * eg. echo 1 > <debugfs_dir>/dri/xxx/securedisplay_test * eg. echo 2 phy_id > <debugfs_dir>/dri/xxx/securedisplay_test * * opcode: * 1：Query whether TA is responding used only for validation pupose * 2: Send region of Interest and CRC value to I2C. (uint32)phy_id is * send to determine which DIO scratch register should be used to get * ROI and receive i2c_buf as the output. * * You can refer more detail from header file ta_securedisplay_if.h * */ void psp_securedisplay_parse_resp_status(struct psp_context *psp,	enum ta_securedisplay_status status){	switch (status) {	case TA_SECUREDISPLAY_STATUS__SUCCESS:		break;	case TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE:		dev_err(psp->adev->dev, "Secure display: Generic Failure.");		break;	case TA_SECUREDISPLAY_STATUS__INVALID_PARAMETER:		dev_err(psp->adev->dev, "Secure display: Invalid Parameter.");		break;	case TA_SECUREDISPLAY_STATUS__NULL_POINTER:		dev_err(psp->adev->dev, "Secure display: Null Pointer.");		break;	case TA_SECUREDISPLAY_STATUS__I2C_WRITE_ERROR:		dev_err(psp->adev->dev, "Secure display: Failed to write to I2C.");		break;	case TA_SECUREDISPLAY_STATUS__READ_DIO_SCRATCH_ERROR:		dev_err(psp->adev->dev, "Secure display: Failed to Read DIO Scratch Register.");		break;	case TA_SECUREDISPLAY_STATUS__READ_CRC_ERROR:		dev_err(psp->adev->dev, "Secure display: Failed to Read CRC");		break;	case TA_SECUREDISPLAY_STATUS__I2C_INIT_ERROR:		dev_err(psp->adev->dev, "Secure display: Failed to initialize I2C.");		break;	default:		dev_err(psp->adev->dev, "Secure display: Failed to parse status: %d\n", status);	}} void psp_prep_securedisplay_cmd_buf(struct psp_context *psp, struct ta_securedisplay_cmd **cmd,	enum ta_securedisplay_command command_id){	*cmd = (struct ta_securedisplay_cmd *)psp->securedisplay_context.context.mem_context.shared_buf;	memset(*cmd, 0, sizeof(struct ta_securedisplay_cmd));	(*cmd)->status = TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE;	(*cmd)->cmd_id = command_id;} #if defined(CONFIG_DEBUG_FS) static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __user *buf,		size_t size, loff_t *pos){	struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;	struct psp_context *psp = &adev->psp;	struct ta_securedisplay_cmd *securedisplay_cmd;	struct drm_device *dev = adev_to_drm(adev);	uint32_t phy_id;	uint32_t op;	char str[64];	long len;	ssize_t write_ret = size;	int ret, nargs; 	if (*pos)		return -EINVAL; 	len = strncpy_from_user(str, buf, sizeof(str));	if (len < 0)		return -EFAULT;	if (len == 0 || len >= sizeof(str))		return -EINVAL; 	ret = pm_runtime_get_sync(dev->dev);	if (ret < 0) {		pm_runtime_put_autosuspend(dev->dev);		return ret;	} 	if (len < 3)		nargs = sscanf(str, "%u", &op);	else		nargs = sscanf(str, "%u %u", &op, &phy_id);	if (nargs < 1) {		write_ret = -EINVAL;		goto out;	} 	switch (op) {	case 1:		mutex_lock(&psp->securedisplay_context.mutex);		psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,			TA_SECUREDISPLAY_COMMAND__QUERY_TA);		ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__QUERY_TA);		if (!ret) {			if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS)				dev_info(adev->dev, "SECUREDISPLAY: query securedisplay TA ret is 0x%X\n",					securedisplay_cmd->securedisplay_out_message.query_ta.query_cmd_ret);			else				psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);		}		mutex_unlock(&psp->securedisplay_context.mutex);		break;	case 2:		if (nargs < 2 || phy_id >= TA_SECUREDISPLAY_MAX_PHY) {			dev_err(adev->dev, "Invalid input: %s\n", str);			write_ret = -EINVAL;			break;		}		mutex_lock(&psp->securedisplay_context.mutex);		psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,			TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);		securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id;		ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);		if (!ret) {			if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS) {				dev_info(adev->dev, "SECUREDISPLAY: I2C buffer out put is: %*ph\n",					 TA_SECUREDISPLAY_I2C_BUFFER_SIZE,					 securedisplay_cmd->securedisplay_out_message.send_roi_crc.i2c_buf);			} else {				psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);			}		}		mutex_unlock(&psp->securedisplay_context.mutex);		break;	default:		dev_err(adev->dev, "Invalid input: %s\n", str);		write_ret = -EINVAL;		break;	} out:	pm_runtime_put_autosuspend(dev->dev); 	return write_ret;} static const struct file_operations amdgpu_securedisplay_debugfs_ops = {	.owner = THIS_MODULE,	.read = NULL,	.write = amdgpu_securedisplay_debugfs_write,	.llseek = default_llseek}; #endif void amdgpu_securedisplay_debugfs_init(struct amdgpu_device *adev){#if defined(CONFIG_DEBUG_FS) 	if (!adev->psp.securedisplay_context.context.initialized)		return; 	debugfs_create_file("securedisplay_test", S_IWUSR, adev_to_drm(adev)->primary->debugfs_root,				adev, &amdgpu_securedisplay_debugfs_ops);#endif}