drivers/gpu/drm/nouveau/nvif/vmm.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvif/vmm.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvif/vmm.c- Extension
.c- Size
- 6258 bytes
- Lines
- 264
- 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.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
nvif/vmm.hnvif/mem.hnvif/if000c.h
Detected Declarations
function filesfunction nvif_vmm_mapfunction nvif_vmm_putfunction nvif_vmm_getfunction nvif_vmm_raw_getfunction nvif_vmm_raw_putfunction nvif_vmm_raw_mapfunction nvif_vmm_raw_unmapfunction nvif_vmm_raw_sparsefunction nvif_vmm_dtorfunction nvif_vmm_ctor
Annotated Snippet
#include <nvif/vmm.h>
#include <nvif/mem.h>
#include <nvif/if000c.h>
int
nvif_vmm_unmap(struct nvif_vmm *vmm, u64 addr)
{
return nvif_object_mthd(&vmm->object, NVIF_VMM_V0_UNMAP,
&(struct nvif_vmm_unmap_v0) { .addr = addr },
sizeof(struct nvif_vmm_unmap_v0));
}
int
nvif_vmm_map(struct nvif_vmm *vmm, u64 addr, u64 size, void *argv, u32 argc,
struct nvif_mem *mem, u64 offset)
{
struct nvif_vmm_map_v0 *args;
u8 stack[48];
int ret;
if (sizeof(*args) + argc > sizeof(stack)) {
if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
return -ENOMEM;
} else {
args = (void *)stack;
}
args->version = 0;
args->addr = addr;
args->size = size;
args->memory = nvif_handle(&mem->object);
args->offset = offset;
memcpy(args->data, argv, argc);
ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_MAP,
args, sizeof(*args) + argc);
if (args != (void *)stack)
kfree(args);
return ret;
}
void
nvif_vmm_put(struct nvif_vmm *vmm, struct nvif_vma *vma)
{
if (vma->size) {
WARN_ON(nvif_object_mthd(&vmm->object, NVIF_VMM_V0_PUT,
&(struct nvif_vmm_put_v0) {
.addr = vma->addr,
}, sizeof(struct nvif_vmm_put_v0)));
vma->size = 0;
}
}
int
nvif_vmm_get(struct nvif_vmm *vmm, enum nvif_vmm_get type, bool sparse,
u8 page, u8 align, u64 size, struct nvif_vma *vma)
{
struct nvif_vmm_get_v0 args;
int ret;
args.version = vma->size = 0;
args.sparse = sparse;
args.page = page;
args.align = align;
args.size = size;
switch (type) {
case ADDR: args.type = NVIF_VMM_GET_V0_ADDR; break;
case PTES: args.type = NVIF_VMM_GET_V0_PTES; break;
case LAZY: args.type = NVIF_VMM_GET_V0_LAZY; break;
default:
WARN_ON(1);
return -EINVAL;
}
ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_GET,
&args, sizeof(args));
if (ret == 0) {
vma->addr = args.addr;
vma->size = args.size;
}
return ret;
}
int
nvif_vmm_raw_get(struct nvif_vmm *vmm, u64 addr, u64 size,
u8 shift)
{
struct nvif_vmm_raw_v0 args = {
Annotation
- Immediate include surface: `nvif/vmm.h`, `nvif/mem.h`, `nvif/if000c.h`.
- Detected declarations: `function files`, `function nvif_vmm_map`, `function nvif_vmm_put`, `function nvif_vmm_get`, `function nvif_vmm_raw_get`, `function nvif_vmm_raw_put`, `function nvif_vmm_raw_map`, `function nvif_vmm_raw_unmap`, `function nvif_vmm_raw_sparse`, `function nvif_vmm_dtor`.
- 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.