drivers/gpu/drm/virtio/virtgpu_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/virtio/virtgpu_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/virtio/virtgpu_debugfs.c
Extension
.c
Size
3819 bytes
Lines
113
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/string_helpers.h>

#include <drm/drm_debugfs.h>
#include <drm/drm_file.h>
#include <drm/drm_print.h>

#include "virtgpu_drv.h"

static void virtio_gpu_add_bool(struct seq_file *m, const char *name,
				bool value)
{
	seq_printf(m, "%-16s : %s\n", name, str_yes_no(value));
}

static void virtio_gpu_add_int(struct seq_file *m, const char *name, int value)
{
	seq_printf(m, "%-16s : %d\n", name, value);
}

static int virtio_gpu_features(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *)m->private;
	struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;

	virtio_gpu_add_bool(m, "virgl", vgdev->has_virgl_3d);
	virtio_gpu_add_bool(m, "edid", vgdev->has_edid);
	virtio_gpu_add_bool(m, "indirect", vgdev->has_indirect);

	virtio_gpu_add_bool(m, "resource uuid",
			    vgdev->has_resource_assign_uuid);

	virtio_gpu_add_bool(m, "blob resources", vgdev->has_resource_blob);
	virtio_gpu_add_bool(m, "context init", vgdev->has_context_init);
	virtio_gpu_add_int(m, "cap sets", vgdev->num_capsets);
	virtio_gpu_add_int(m, "scanouts", vgdev->num_scanouts);
	if (vgdev->host_visible_region.len) {
		seq_printf(m, "%-16s : 0x%lx +0x%lx\n", "host visible region",
			   (unsigned long)vgdev->host_visible_region.addr,
			   (unsigned long)vgdev->host_visible_region.len);
	}
	return 0;
}

static int
virtio_gpu_debugfs_irq_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;

	seq_printf(m, "fence %llu %lld\n",
		   (u64)atomic64_read(&vgdev->fence_drv.last_fence_id),
		   vgdev->fence_drv.current_fence_id);
	return 0;
}

static int
virtio_gpu_debugfs_host_visible_mm(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *)m->private;
	struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;
	struct drm_printer p;

	if (!vgdev->has_host_visible) {
		seq_puts(m, "Host allocations not visible to guest\n");
		return 0;
	}

	p = drm_seq_file_printer(m);
	drm_mm_print(&vgdev->host_visible_mm, &p);
	return 0;
}

static struct drm_info_list virtio_gpu_debugfs_list[] = {
	{ "virtio-gpu-features", virtio_gpu_features },
	{ "virtio-gpu-irq-fence", virtio_gpu_debugfs_irq_info, 0, NULL },
	{ "virtio-gpu-host-visible-mm", virtio_gpu_debugfs_host_visible_mm },
};

#define VIRTIO_GPU_DEBUGFS_ENTRIES ARRAY_SIZE(virtio_gpu_debugfs_list)

void
virtio_gpu_debugfs_init(struct drm_minor *minor)
{
	drm_debugfs_create_files(virtio_gpu_debugfs_list,
				 VIRTIO_GPU_DEBUGFS_ENTRIES,
				 minor->debugfs_root, minor);
}

Annotation

Implementation Notes