drm/amdgpu: add debugfs interface for RAP test

After amdgpu driver loading successfully, we can use
RAP debugfs interface <debugfs_dir>/dri/xxx/rap_test
to trigger RAP test.

Currently only L0 validate test is supported.

v2: refine amdgpu_rap.h

Signed-off-by: Wenhui Sheng <Wenhui.Sheng@amd.com>
Reviewed-by: Guchun Chen <Guchun.Chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 0ba396e9d7e4079ea0088ef8fea5625efe2a0c4c..dec1927ca75d420b36ba53b9a6f28fe7de29f2c7 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -55,7 +55,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
        amdgpu_vf_error.o amdgpu_sched.o amdgpu_debugfs.o amdgpu_ids.o \
        amdgpu_gmc.o amdgpu_mmhub.o amdgpu_xgmi.o amdgpu_csa.o amdgpu_ras.o amdgpu_vm_cpu.o \
        amdgpu_vm_sdma.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \
-       amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o
+       amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o
 
 amdgpu-$(CONFIG_PERF_EVENTS) += amdgpu_pmu.o
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 3a4b31b1c4f2f3e5a2812dc42d5d972a278dd086..0af249a1e35b7d1150dcc8acd07925930beffa10 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -34,6 +34,7 @@
 #include "amdgpu_pm.h"
 #include "amdgpu_dm_debugfs.h"
 #include "amdgpu_ras.h"
+#include "amdgpu_rap.h"
 
 /**
  * amdgpu_debugfs_add_files - Add simple debugfs entries
@@ -1623,6 +1624,8 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
 
        amdgpu_debugfs_autodump_init(adev);
 
+       amdgpu_rap_debugfs_init(adev);
+
        return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_list,
                                        ARRAY_SIZE(amdgpu_debugfs_list));
 }

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c
new file mode 100644 (file)
index 0000000..87cbc90
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2020 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_rap.h"
+
+/**
+ * DOC: AMDGPU RAP debugfs test interface
+ *
+ * how to use?
+ * echo opcode > <debugfs_dir>/dri/xxx/rap_test
+ *
+ * opcode:
+ * currently, only 2 is supported by Linux host driver,
+ * opcode 2 stands for TA_CMD_RAP__VALIDATE_L0, used to
+ * trigger L0 policy validation, you can refer more detail
+ * from header file ta_rap_if.h
+ *
+ */
+static ssize_t amdgpu_rap_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 ta_rap_shared_memory *rap_shared_mem;
+       struct ta_rap_cmd_output_data *rap_cmd_output;
+       struct drm_device *dev = adev->ddev;
+       uint32_t op;
+       int ret;
+
+       if (*pos || size != 2)
+               return -EINVAL;
+
+       ret = kstrtouint_from_user(buf, size, *pos, &op);
+       if (ret)
+               return ret;
+
+       ret = pm_runtime_get_sync(dev->dev);
+       if (ret < 0) {
+               pm_runtime_put_autosuspend(dev->dev);
+               return ret;
+       }
+
+       /* make sure gfx core is on, RAP TA cann't handle
+        * GFX OFF case currently.
+        */
+       amdgpu_gfx_off_ctrl(adev, false);
+
+       switch (op) {
+       case 2:
+               ret = psp_rap_invoke(&adev->psp, op);
+
+               if (ret == TA_RAP_STATUS__SUCCESS) {
+                       dev_info(adev->dev, "RAP L0 validate test success.\n");
+               } else {
+                       rap_shared_mem = (struct ta_rap_shared_memory *)
+                                        adev->psp.rap_context.rap_shared_buf;
+                       rap_cmd_output = &(rap_shared_mem->rap_out_message.output);
+
+                       dev_info(adev->dev, "RAP test failed, the output is:\n");
+                       dev_info(adev->dev, "\tlast_subsection: 0x%08x.\n",
+                                rap_cmd_output->last_subsection);
+                       dev_info(adev->dev, "\tnum_total_validate: 0x%08x.\n",
+                                rap_cmd_output->num_total_validate);
+                       dev_info(adev->dev, "\tnum_valid: 0x%08x.\n",
+                                rap_cmd_output->num_valid);
+                       dev_info(adev->dev, "\tlast_validate_addr: 0x%08x.\n",
+                                rap_cmd_output->last_validate_addr);
+                       dev_info(adev->dev, "\tlast_validate_val: 0x%08x.\n",
+                                rap_cmd_output->last_validate_val);
+                       dev_info(adev->dev, "\tlast_validate_val_exptd: 0x%08x.\n",
+                                rap_cmd_output->last_validate_val_exptd);
+               }
+               break;
+       default:
+               dev_info(adev->dev, "Unsupported op id: %d, ", op);
+               dev_info(adev->dev, "Only support op 2(L0 validate test).\n");
+       }
+
+       amdgpu_gfx_off_ctrl(adev, true);
+       pm_runtime_mark_last_busy(dev->dev);
+       pm_runtime_put_autosuspend(dev->dev);
+
+       return size;
+}
+
+static const struct file_operations amdgpu_rap_debugfs_ops = {
+       .owner = THIS_MODULE,
+       .read = NULL,
+       .write = amdgpu_rap_debugfs_write,
+       .llseek = default_llseek
+};
+
+void amdgpu_rap_debugfs_init(struct amdgpu_device *adev)
+{
+#if defined(CONFIG_DEBUG_FS)
+       struct drm_minor *minor = adev->ddev->primary;
+
+       if (!adev->psp.rap_context.rap_initialized)
+               return;
+
+       debugfs_create_file("rap_test", S_IWUSR, minor->debugfs_root,
+                               adev, &amdgpu_rap_debugfs_ops);
+#endif
+}

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.h
new file mode 100644 (file)
index 0000000..ec6d763
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2020 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.
+ *
+ *
+ */
+#ifndef _AMDGPU_RAP_H
+#define _AMDGPU_RAP_H
+
+#include "amdgpu.h"
+
+void amdgpu_rap_debugfs_init(struct amdgpu_device *adev);
+#endif