drivers/gpu/drm/nouveau/nvkm/subdev/fault/user.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/fault/user.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/fault/user.c- Extension
.c- Size
- 3372 bytes
- Lines
- 111
- 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
priv.hcore/memory.hcore/event.hsubdev/mmu.hnvif/clb069.hnvif/unpack.h
Detected Declarations
function filesfunction nvkm_ufault_mapfunction nvkm_ufault_finifunction nvkm_ufault_initfunction nvkm_ufault_dtorfunction nvkm_ufault_new
Annotated Snippet
#include "priv.h"
#include <core/memory.h>
#include <core/event.h>
#include <subdev/mmu.h>
#include <nvif/clb069.h>
#include <nvif/unpack.h>
static int
nvkm_ufault_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
{
struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
union nvif_clb069_event_args *args = argv;
if (!uevent)
return 0;
if (argc != sizeof(args->vn))
return -ENOSYS;
return nvkm_uevent_add(uevent, &buffer->fault->event, buffer->id,
NVKM_FAULT_BUFFER_EVENT_PENDING, NULL);
}
static int
nvkm_ufault_map(struct nvkm_object *object, void *argv, u32 argc,
enum nvkm_object_map *type, u64 *addr, u64 *size)
{
struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
struct nvkm_device *device = buffer->fault->subdev.device;
*type = NVKM_OBJECT_MAP_IO;
*addr = device->func->resource_addr(device, NVKM_BAR2_INST) + buffer->addr;
*size = nvkm_memory_size(buffer->mem);
return 0;
}
static int
nvkm_ufault_fini(struct nvkm_object *object, enum nvkm_suspend_state suspend)
{
struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
buffer->fault->func->buffer.fini(buffer);
return 0;
}
static int
nvkm_ufault_init(struct nvkm_object *object)
{
struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
buffer->fault->func->buffer.init(buffer);
return 0;
}
static void *
nvkm_ufault_dtor(struct nvkm_object *object)
{
return NULL;
}
static const struct nvkm_object_func
nvkm_ufault = {
.dtor = nvkm_ufault_dtor,
.init = nvkm_ufault_init,
.fini = nvkm_ufault_fini,
.map = nvkm_ufault_map,
.uevent = nvkm_ufault_uevent,
};
int
nvkm_ufault_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
void *argv, u32 argc, struct nvkm_object **pobject)
{
union {
struct nvif_clb069_v0 v0;
} *args = argv;
struct nvkm_fault *fault = device->fault;
struct nvkm_fault_buffer *buffer = fault->buffer[fault->func->user.rp];
int ret = -ENOSYS;
if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
args->v0.entries = buffer->entries;
args->v0.get = buffer->get;
args->v0.put = buffer->put;
} else
return ret;
nvkm_object_ctor(&nvkm_ufault, oclass, &buffer->object);
*pobject = &buffer->object;
return 0;
}
Annotation
- Immediate include surface: `priv.h`, `core/memory.h`, `core/event.h`, `subdev/mmu.h`, `nvif/clb069.h`, `nvif/unpack.h`.
- Detected declarations: `function files`, `function nvkm_ufault_map`, `function nvkm_ufault_fini`, `function nvkm_ufault_init`, `function nvkm_ufault_dtor`, `function nvkm_ufault_new`.
- 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.