[PATCH] drm/amdgpu: SW part of MES event log enablement

[shaoyunl]

This is the generic SW part, prepare the event log buffer and dump it through debugfs

Signed-off-by: shaoyunl <shaoyun.liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c     | 61 +++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h     |  5 ++
 4 files changed, 70 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index a53f436fa9f1..8b2cbeae99ca 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -2140,6 +2140,8 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
 	amdgpu_debugfs_firmware_init(adev);
 	amdgpu_ta_if_debugfs_init(adev);
 
+	amdgpu_debugfs_mes_event_log_init(adev);
+
 #if defined(CONFIG_DRM_AMD_DC)
 	if (adev->dc_enabled)
 		dtn_debugfs_init(adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h
index 371a6f0deb29..0425432d8659 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h
@@ -32,3 +32,5 @@ void amdgpu_debugfs_fini(struct amdgpu_device *adev);
 void amdgpu_debugfs_fence_init(struct amdgpu_device *adev);
 void amdgpu_debugfs_firmware_init(struct amdgpu_device *adev);
 void amdgpu_debugfs_gem_init(struct amdgpu_device *adev);
+void amdgpu_debugfs_mes_event_log_init(struct amdgpu_device *adev);
+
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index 45280fb0e00c..b7af24d7db0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -97,6 +97,26 @@ static int amdgpu_mes_doorbell_init(struct amdgpu_device *adev)
 	return 0;
 }
 
+static int amdgpu_mes_event_log_init(struct amdgpu_device *adev)
+{
+	int r;
+
+	r = amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
+				    AMDGPU_GEM_DOMAIN_GTT,
+				    &adev->mes.event_log_gpu_obj,
+				    &adev->mes.event_log_gpu_addr,
+				    &adev->mes.event_log_cpu_addr);
+	if (r) {
+		dev_warn(adev->dev, "failed to create MES event log buffer (%d)", r);
+		return r;
+	}
+
+	memset(adev->mes.event_log_cpu_addr, 0, PAGE_SIZE);
+
+	return  0;
+
+}
+
 static void amdgpu_mes_doorbell_free(struct amdgpu_device *adev)
 {
 	bitmap_free(adev->mes.doorbell_bitmap);
@@ -181,6 +201,12 @@ int amdgpu_mes_init(struct amdgpu_device *adev)
 	if (r)
 		goto error;
 
+	r = amdgpu_mes_event_log_init(adev);
+	if (r) {
+		amdgpu_mes_doorbell_free(adev);
+		goto error;
+	}
+
 	return 0;
 
 error:
@@ -198,6 +224,10 @@ int amdgpu_mes_init(struct amdgpu_device *adev)
 
 void amdgpu_mes_fini(struct amdgpu_device *adev)
 {
+	amdgpu_bo_free_kernel(&adev->mes.event_log_gpu_obj,
+			      &adev->mes.event_log_gpu_addr,
+			      &adev->mes.event_log_cpu_addr);
+
 	amdgpu_device_wb_free(adev, adev->mes.sch_ctx_offs);
 	amdgpu_device_wb_free(adev, adev->mes.query_status_fence_offs);
 	amdgpu_device_wb_free(adev, adev->mes.read_val_offs);
@@ -1483,3 +1513,34 @@ int amdgpu_mes_init_microcode(struct amdgpu_device *adev, int pipe)
 	amdgpu_ucode_release(&adev->mes.fw[pipe]);
 	return r;
 }
+
+#if defined(CONFIG_DEBUG_FS)
+
+static int amdgpu_debugfs_mes_event_log_show(struct seq_file *m, void *unused)
+{
+	struct amdgpu_device *adev = m->private;
+	uint32_t *mem = (uint32_t *)(adev->mes.event_log_cpu_addr);
+
+	seq_hex_dump(m, "", DUMP_PREFIX_OFFSET, 32, 4,
+		     mem, PAGE_SIZE, false);
+
+	return 0;
+}
+
+
+DEFINE_SHOW_ATTRIBUTE(amdgpu_debugfs_mes_event_log);
+
+#endif
+
+void amdgpu_debugfs_mes_event_log_init(struct amdgpu_device *adev)
+{
+
+#if defined(CONFIG_DEBUG_FS)
+	struct drm_minor *minor = adev_to_drm(adev)->primary;
+	struct dentry *root = minor->debugfs_root;
+
+	debugfs_create_file("amdgpu_mes_event_log", 0444, root,
+			    adev, &amdgpu_debugfs_mes_event_log_fops);
+
+#endif
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
index a27b424ffe00..894b9b133000 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
@@ -133,6 +133,11 @@ struct amdgpu_mes {
 	uint32_t			num_mes_dbs;
 	unsigned long			*doorbell_bitmap;
 
+	/* MES event log buffer */
+	struct amdgpu_bo		*event_log_gpu_obj;
+	uint64_t                        event_log_gpu_addr;
+	void				*event_log_cpu_addr;
+
 	/* ip specific functions */
 	const struct amdgpu_mes_funcs   *funcs;
 };
-- 
2.34.1