drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv04.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv04.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv04.c- Extension
.c- Size
- 3875 bytes
- Lines
- 142
- 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
vmm.hnvif/if000d.hnvif/unpack.h
Detected Declarations
function filesfunction nv04_vmm_pgt_sglfunction nv04_vmm_pgt_dmafunction nv04_vmm_pgt_unmapfunction nv04_vmm_validfunction nv04_vmm_new_function nv04_vmm_new
Annotated Snippet
#include "vmm.h"
#include <nvif/if000d.h>
#include <nvif/unpack.h>
static inline void
nv04_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
{
u32 data = addr | 0x00000003; /* PRESENT, RW. */
while (ptes--) {
VMM_WO032(pt, vmm, 8 + ptei++ * 4, data);
data += 0x00001000;
}
}
static void
nv04_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
{
VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
}
static void
nv04_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
{
#if PAGE_SHIFT == 12
nvkm_kmap(pt->memory);
while (ptes--)
VMM_WO032(pt, vmm, 8 + (ptei++ * 4), *map->dma++ | 0x00000003);
nvkm_done(pt->memory);
#else
VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
#endif
}
static void
nv04_vmm_pgt_unmap(struct nvkm_vmm *vmm,
struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
{
VMM_FO032(pt, vmm, 8 + (ptei * 4), 0, ptes);
}
static const struct nvkm_vmm_desc_func
nv04_vmm_desc_pgt = {
.unmap = nv04_vmm_pgt_unmap,
.dma = nv04_vmm_pgt_dma,
.sgl = nv04_vmm_pgt_sgl,
};
static const struct nvkm_vmm_desc
nv04_vmm_desc_12[] = {
{ PGT, 15, 4, 0x1000, &nv04_vmm_desc_pgt },
{}
};
int
nv04_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
struct nvkm_vmm_map *map)
{
union {
struct nv04_vmm_map_vn vn;
} *args = argv;
int ret = -ENOSYS;
if ((ret = nvif_unvers(ret, &argv, &argc, args->vn)))
VMM_DEBUG(vmm, "args");
return ret;
}
static const struct nvkm_vmm_func
nv04_vmm = {
.valid = nv04_vmm_valid,
.page = {
{ 12, &nv04_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
{}
}
};
int
nv04_vmm_new_(const struct nvkm_vmm_func *func, struct nvkm_mmu *mmu,
u32 pd_header, bool managed, u64 addr, u64 size,
void *argv, u32 argc, struct lock_class_key *key,
const char *name, struct nvkm_vmm **pvmm)
{
union {
struct nv04_vmm_vn vn;
} *args = argv;
int ret;
Annotation
- Immediate include surface: `vmm.h`, `nvif/if000d.h`, `nvif/unpack.h`.
- Detected declarations: `function files`, `function nv04_vmm_pgt_sgl`, `function nv04_vmm_pgt_dma`, `function nv04_vmm_pgt_unmap`, `function nv04_vmm_valid`, `function nv04_vmm_new_`, `function nv04_vmm_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.