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>

1 files changed, 127 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c
new file mode 100644
index 000000000000..87cbc9011b2d
--- /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
+}