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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/string_helpers.hdrm/drm_debugfs.hdrm/drm_file.hdrm/drm_print.hvirtgpu_drv.h
Detected Declarations
function Copyrightfunction virtio_gpu_add_intfunction virtio_gpu_featuresfunction virtio_gpu_debugfs_irq_infofunction virtio_gpu_debugfs_host_visible_mmfunction virtio_gpu_debugfs_init
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
- Immediate include surface: `linux/string_helpers.h`, `drm/drm_debugfs.h`, `drm/drm_file.h`, `drm/drm_print.h`, `virtgpu_drv.h`.
- Detected declarations: `function Copyright`, `function virtio_gpu_add_int`, `function virtio_gpu_features`, `function virtio_gpu_debugfs_irq_info`, `function virtio_gpu_debugfs_host_visible_mm`, `function virtio_gpu_debugfs_init`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.