drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c

   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  */
  43 static 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
 109 static 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
 116 void 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 }