/*
* Copyright 2022 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 "amdgpu.h"
#include "amdgpu_psp_ta.h"
#if defined(CONFIG_DEBUG_FS)
static ssize_t ta_if_load_debugfs_write(struct file *fp, const char *buf,
size_t len, loff_t *off);
static ssize_t ta_if_unload_debugfs_write(struct file *fp, const char *buf,
size_t len, loff_t *off);
static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf,
size_t len, loff_t *off);
static uint32_t get_bin_version(const uint8_t *bin)
{
const struct common_firmware_header *hdr =
(const struct common_firmware_header *)bin;
return hdr->ucode_version;
}
static int prep_ta_mem_context(struct ta_mem_context *mem_context,
uint8_t *shared_buf,
uint32_t shared_buf_len)
{
if (mem_context->shared_mem_size < shared_buf_len)
return -EINVAL;
memset(mem_context->shared_buf, 0, mem_context->shared_mem_size);
memcpy((void *)mem_context->shared_buf, shared_buf, shared_buf_len);
return 0;
}
static bool is_ta_type_valid(enum ta_type_id ta_type)
{
switch (ta_type) {
case TA_TYPE_RAS:
return true;
default:
return false;
}
}
static const struct ta_funcs ras_ta_funcs = {
.fn_ta_initialize = psp_ras_initialize,
.fn_ta_invoke = psp_ras_invoke,
.fn_ta_terminate = psp_ras_terminate
};
static void set_ta_context_funcs(struct psp_context *psp,
enum ta_type_id ta_type,
struct ta_context **pcontext)
{
switch (ta_type) {
case TA_TYPE_RAS:
*pcontext = &psp->ras_context.context;
psp->ta_funcs = &ras_ta_funcs;
break;
default:
break;
}
}
static const struct file_operations ta_load_debugfs_fops = {
.write = ta_if_load_debugfs_write,
.llseek = default_llseek,
.owner = THIS_MODULE
};
static const struct file_operations ta_unload_debugfs_fops = {
.write = ta_if_unload_debugfs_write,
.llseek = default_llseek,
.owner = THIS_MODULE
};
static const struct file_operations ta_invoke_debugfs_fops = {
.write = ta_if_invoke_debugfs_write,
.llseek = default_llseek,
.owner = THIS_MODULE
};
/*
* DOC: AMDGPU TA debugfs interfaces
*
* Three debugfs interfaces can be opened by a program to
* load/invoke/unload TA,
*
* - /sys/kernel/debug/dri/<N>/ta_if/ta_load
* - /sys/kernel/debug/dri/<N>/ta_if/ta_invoke
* - /sys/kernel/debug/dri/<N>/ta_if/ta_unload
*
* How to use the interfaces in a program?
*
* A program needs to provide transmit buffer to the interfaces
* and will receive buffer from the interfaces below,
*
* - For TA load debugfs interface:
* Transmit buffer:
* - TA type (4bytes)
* - TA bin length (4bytes)
* - TA bin
* Receive buffer:
* - TA ID (4bytes)
*
* - For TA invoke debugfs interface:
* Transmit buffer:
* - TA type (4bytes)
* - TA ID (4bytes)
* - TA CMD ID (4bytes)
* - TA shard buf length
* (4bytes, value not beyond TA shared memory size)
* - TA shared buf
* Receive buffer:
* - TA shared buf
*
* - For TA unload debugfs interface:
* Transmit buffer:
* - TA type (4bytes)
* - TA ID (4bytes)
*/
static ssize_t ta_if_load_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
{
uint32_t ta_type = 0;
uint32_t ta_bin_len = 0;
uint8_t *ta_bin = NULL;
uint32_t copy_pos = 0;
int ret = 0;
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
struct psp_context *psp = &adev->psp;
struct ta_context *context = NULL;
if (!buf)
return -EINVAL;
ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
if (ret || (!is_ta_type_valid(ta_type)))
return -EFAULT;
copy_pos += sizeof(uint32_t);
ret = copy_from_user((void *)&ta_bin_len, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
if (ta_bin_len > PSP_1_MEG)
return -EINVAL;
copy_pos += sizeof(uint32_t);
ta_bin = kzalloc(ta_bin_len, GFP_KERNEL);
if (!ta_bin)
return -ENOMEM;
if (copy_from_user((void *)ta_bin, &buf[copy_pos], ta_bin_len)) {
ret = -EFAULT;
goto err_free_bin;
}
/* Set TA context and functions */
set_ta_context_funcs(psp, ta_type, &context);
if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_terminate) {
dev_err(adev->dev, "Unsupported function to terminate TA\n");
ret = -EOPNOTSUPP;
goto err_free_bin;
}
/*
* Allocate TA shared buf in case shared buf was freed
* due to loading TA failed before.
*/
if (!context->mem_context.shared_buf) {
ret = psp_ta_init_shared_buf(psp, &context->mem_context);
if (ret) {
ret = -ENOMEM;
goto err_free_bin;
}
}
ret = psp_fn_ta_terminate(psp);
if (ret || context->resp_status) {
dev_err(adev->dev,
"Failed to unload embedded TA (%d) and status (0x%X)\n",
ret, context->resp_status);
if (!ret)
ret = -EINVAL;
goto err_free_ta_shared_buf;
}
/* Prepare TA context for TA initialization */
context->ta_type = ta_type;
context->bin_desc.fw_version = get_bin_version(ta_bin);
context->bin_desc.size_bytes = ta_bin_len;
context->bin_desc.start_addr = ta_bin;
if (!psp->ta_funcs->fn_ta_initialize) {
dev_err(adev->dev, "Unsupported function to initialize TA\n");
ret = -EOPNOTSUPP;
goto err_free_ta_shared_buf;
}
ret = psp_fn_ta_initialize(psp);
if (ret || context->resp_status) {
dev_err(adev->dev, "Failed to load TA via debugfs (%d) and status (0x%X)\n",
ret, context->resp_status);
if (!ret)
ret = -EINVAL;
goto err_free_ta_shared_buf;
}
if (copy_to_user((char *)buf, (void *)&context->session_id, sizeof(uint32_t)))
ret = -EFAULT;
err_free_ta_shared_buf:
/* Only free TA shared buf when returns error code */
if (ret && context->mem_context.shared_buf)
psp_ta_free_shared_buf(&context->mem_context);
err_free_bin:
kfree(ta_bin);
return ret;
}
static ssize_t ta_if_unload_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
{
uint32_t ta_type = 0;
uint32_t ta_id = 0;
uint32_t copy_pos = 0;
int ret = 0;
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
struct psp_context *psp = &adev->psp;
struct ta_context *context = NULL;
if (!buf)
return -EINVAL;
ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
if (ret || (!is_ta_type_valid(ta_type)))
return -EFAULT;
copy_pos += sizeof(uint32_t);
ret = copy_from_user((void *)&ta_id, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
set_ta_context_funcs(psp, ta_type, &context);
context->session_id = ta_id;
if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_terminate) {
dev_err(adev->dev, "Unsupported function to terminate TA\n");
return -EOPNOTSUPP;
}
ret = psp_fn_ta_terminate(psp);
if (ret || context->resp_status) {
dev_err(adev->dev, "Failed to unload TA via debugfs (%d) and status (0x%X)\n",
ret, context->resp_status);
if (!ret)
ret = -EINVAL;
}
if (context->mem_context.shared_buf)
psp_ta_free_shared_buf(&context->mem_context);
return ret;
}
static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size_t len, loff_t *off)
{
uint32_t ta_type = 0;
uint32_t ta_id = 0;
uint32_t cmd_id = 0;
uint32_t shared_buf_len = 0;
uint8_t *shared_buf = NULL;
uint32_t copy_pos = 0;
int ret = 0;
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(fp)->i_private;
struct psp_context *psp = &adev->psp;
struct ta_context *context = NULL;
if (!buf)
return -EINVAL;
ret = copy_from_user((void *)&ta_type, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
copy_pos += sizeof(uint32_t);
ret = copy_from_user((void *)&ta_id, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
copy_pos += sizeof(uint32_t);
ret = copy_from_user((void *)&cmd_id, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
copy_pos += sizeof(uint32_t);
ret = copy_from_user((void *)&shared_buf_len, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
copy_pos += sizeof(uint32_t);
shared_buf = kzalloc(shared_buf_len, GFP_KERNEL);
if (!shared_buf)
return -ENOMEM;
if (copy_from_user((void *)shared_buf, &buf[copy_pos], shared_buf_len)) {
ret = -EFAULT;
goto err_free_shared_buf;
}
set_ta_context_funcs(psp, ta_type, &context);
if (!context || !context->initialized) {
dev_err(adev->dev, "TA is not initialized\n");
ret = -EINVAL;
goto err_free_shared_buf;
}
if (!psp->ta_funcs || !psp->ta_funcs->fn_ta_invoke) {
dev_err(adev->dev, "Unsupported function to invoke TA\n");
ret = -EOPNOTSUPP;
goto err_free_shared_buf;
}
context->session_id = ta_id;
mutex_lock(&psp->ras_context.mutex);
ret = prep_ta_mem_context(&context->mem_context, shared_buf, shared_buf_len);
if (ret)
goto err_free_shared_buf;
ret = psp_fn_ta_invoke(psp, cmd_id);
if (ret || context->resp_status) {
dev_err(adev->dev, "Failed to invoke TA via debugfs (%d) and status (0x%X)\n",
ret, context->resp_status);
if (!ret) {
ret = -EINVAL;
goto err_free_shared_buf;
}
}
if (copy_to_user((char *)&buf[copy_pos], context->mem_context.shared_buf, shared_buf_len))
ret = -EFAULT;
err_free_shared_buf:
mutex_unlock(&psp->ras_context.mutex);
kfree(shared_buf);
return ret;
}
void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev)
{
struct drm_minor *minor = adev_to_drm(adev)->primary;
struct dentry *dir = debugfs_create_dir("ta_if", minor->debugfs_root);
debugfs_create_file("ta_load", 0200, dir, adev,
&ta_load_debugfs_fops);
debugfs_create_file("ta_unload", 0200, dir,
adev, &ta_unload_debugfs_fops);
debugfs_create_file("ta_invoke", 0200, dir,
adev, &ta_invoke_debugfs_fops);
}
#else
void amdgpu_ta_if_debugfs_init(struct amdgpu_device *adev)
{
}
#endif
Codebase Browser
linux