drivers/gpu/drm/nouveau/nouveau_ioc32.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nouveau_ioc32.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nouveau_ioc32.c- Extension
.c- Size
- 2240 bytes
- Lines
- 71
- 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/compat.hdrm/drm.hdrm/drm_ioctl.hnouveau_ioctl.h
Detected Declarations
function Copyright
Annotated Snippet
#include <linux/compat.h>
#include <drm/drm.h>
#include <drm/drm_ioctl.h>
#include "nouveau_ioctl.h"
/*
* Called whenever a 32-bit process running under a 64-bit kernel
* performs an ioctl on /dev/dri/card<n>.
*
* \param filp file pointer.
* \param cmd command.
* \param arg user argument.
* \return zero on success or negative number on failure.
*/
long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
unsigned int nr = DRM_IOCTL_NR(cmd);
drm_ioctl_compat_t *fn = NULL;
int ret;
if (nr < DRM_COMMAND_BASE)
return drm_compat_ioctl(filp, cmd, arg);
#if 0
if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
#endif
if (fn != NULL)
ret = (*fn)(filp, cmd, arg);
else
ret = nouveau_drm_ioctl(filp, cmd, arg);
return ret;
}
Annotation
- Immediate include surface: `linux/compat.h`, `drm/drm.h`, `drm/drm_ioctl.h`, `nouveau_ioctl.h`.
- Detected declarations: `function Copyright`.
- 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.