LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

   1/*
   2 * Copyright 2020 Advanced Micro Devices, Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 *
  23 */
  24#include <linux/debugfs.h>
  25#include <linux/pm_runtime.h>
  26
  27#include "amdgpu.h"
  28#include "amdgpu_rap.h"
  29
  30/**
  31 * DOC: AMDGPU RAP debugfs test interface
  32 *
  33 * how to use?
  34 * echo opcode > <debugfs_dir>/dri/xxx/rap_test
  35 *
  36 * opcode:
  37 * currently, only 2 is supported by Linux host driver,
  38 * opcode 2 stands for TA_CMD_RAP__VALIDATE_L0, used to
  39 * trigger L0 policy validation, you can refer more detail
  40 * from header file ta_rap_if.h
  41 *
  42 */
  43static ssize_t amdgpu_rap_debugfs_write(struct file *f, const char __user *buf,
  44                size_t size, loff_t *pos)
  45{
  46        struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
  47        struct ta_rap_shared_memory *rap_shared_mem;
  48        struct ta_rap_cmd_output_data *rap_cmd_output;
  49        struct drm_device *dev = adev_to_drm(adev);
  50        uint32_t op;
  51        int ret;
  52
  53        if (*pos || size != 2)
  54                return -EINVAL;
  55
  56        ret = kstrtouint_from_user(buf, size, *pos, &op);
  57        if (ret)
  58                return ret;
  59
  60        ret = pm_runtime_get_sync(dev->dev);
  61        if (ret < 0) {
  62                pm_runtime_put_autosuspend(dev->dev);
  63                return ret;
  64        }
  65
  66        /* make sure gfx core is on, RAP TA cann't handle
  67         * GFX OFF case currently.
  68         */
  69        amdgpu_gfx_off_ctrl(adev, false);
  70
  71        switch (op) {
  72        case 2:
  73                ret = psp_rap_invoke(&adev->psp, op);
  74
  75                if (ret == TA_RAP_STATUS__SUCCESS) {
  76                        dev_info(adev->dev, "RAP L0 validate test success.\n");
  77                } else {
  78                        rap_shared_mem = (struct ta_rap_shared_memory *)
  79                                         adev->psp.rap_context.rap_shared_buf;
  80                        rap_cmd_output = &(rap_shared_mem->rap_out_message.output);
  81
  82                        dev_info(adev->dev, "RAP test failed, the output is:\n");
  83                        dev_info(adev->dev, "\tlast_subsection: 0x%08x.\n",
  84                                 rap_cmd_output->last_subsection);
  85                        dev_info(adev->dev, "\tnum_total_validate: 0x%08x.\n",
  86                                 rap_cmd_output->num_total_validate);
  87                        dev_info(adev->dev, "\tnum_valid: 0x%08x.\n",
  88                                 rap_cmd_output->num_valid);
  89                        dev_info(adev->dev, "\tlast_validate_addr: 0x%08x.\n",
  90                                 rap_cmd_output->last_validate_addr);
  91                        dev_info(adev->dev, "\tlast_validate_val: 0x%08x.\n",
  92                                 rap_cmd_output->last_validate_val);
  93                        dev_info(adev->dev, "\tlast_validate_val_exptd: 0x%08x.\n",
  94                                 rap_cmd_output->last_validate_val_exptd);
  95                }
  96                break;
  97        default:
  98                dev_info(adev->dev, "Unsupported op id: %d, ", op);
  99                dev_info(adev->dev, "Only support op 2(L0 validate test).\n");
 100        }
 101
 102        amdgpu_gfx_off_ctrl(adev, true);
 103        pm_runtime_mark_last_busy(dev->dev);
 104        pm_runtime_put_autosuspend(dev->dev);
 105
 106        return size;
 107}
 108
 109static const struct file_operations amdgpu_rap_debugfs_ops = {
 110        .owner = THIS_MODULE,
 111        .read = NULL,
 112        .write = amdgpu_rap_debugfs_write,
 113        .llseek = default_llseek
 114};
 115
 116void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
 117{
 118#if defined(CONFIG_DEBUG_FS)
 119        struct drm_minor *minor = adev_to_drm(adev)->primary;
 120
 121        if (!adev->psp.rap_context.rap_initialized)
 122                return;
 123
 124        debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
 125                                adev, &amdgpu_rap_debugfs_ops);
 126#endif
 127}
 128