drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c- Extension
.c- Size
- 4785 bytes
- Lines
- 143
- 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.hcgrp.hchan.hchid.hrunl.hregsnv04.hcore/ramht.hsubdev/instmem.hnvif/class.h
Detected Declarations
function filesfunction nv17_fifo_initfunction nv17_fifo_new
Annotated Snippet
#include "priv.h"
#include "cgrp.h"
#include "chan.h"
#include "chid.h"
#include "runl.h"
#include "regsnv04.h"
#include <core/ramht.h>
#include <subdev/instmem.h>
#include <nvif/class.h>
static int
nv17_chan_ramfc_write(struct nvkm_chan *chan, u64 offset, u64 length, u32 devm, bool priv)
{
struct nvkm_memory *ramfc = chan->cgrp->runl->fifo->engine.subdev.device->imem->ramfc;
const u32 base = chan->id * 64;
chan->ramfc_offset = base;
nvkm_kmap(ramfc);
nvkm_wo32(ramfc, base + 0x00, offset);
nvkm_wo32(ramfc, base + 0x04, offset);
nvkm_wo32(ramfc, base + 0x0c, chan->push->addr >> 4);
nvkm_wo32(ramfc, base + 0x14, NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
#ifdef __BIG_ENDIAN
NV_PFIFO_CACHE1_BIG_ENDIAN |
#endif
NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8);
nvkm_done(ramfc);
return 0;
}
static const struct nvkm_chan_func_ramfc
nv17_chan_ramfc = {
.layout = (const struct nvkm_ramfc_layout[]) {
{ 32, 0, 0x00, 0, NV04_PFIFO_CACHE1_DMA_PUT },
{ 32, 0, 0x04, 0, NV04_PFIFO_CACHE1_DMA_GET },
{ 32, 0, 0x08, 0, NV10_PFIFO_CACHE1_REF_CNT },
{ 16, 0, 0x0c, 0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
{ 16, 16, 0x0c, 0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
{ 32, 0, 0x10, 0, NV04_PFIFO_CACHE1_DMA_STATE },
{ 32, 0, 0x14, 0, NV04_PFIFO_CACHE1_DMA_FETCH },
{ 32, 0, 0x18, 0, NV04_PFIFO_CACHE1_ENGINE },
{ 32, 0, 0x1c, 0, NV04_PFIFO_CACHE1_PULL1 },
{ 32, 0, 0x20, 0, NV10_PFIFO_CACHE1_ACQUIRE_VALUE },
{ 32, 0, 0x24, 0, NV10_PFIFO_CACHE1_ACQUIRE_TIMESTAMP },
{ 32, 0, 0x28, 0, NV10_PFIFO_CACHE1_ACQUIRE_TIMEOUT },
{ 32, 0, 0x2c, 0, NV10_PFIFO_CACHE1_SEMAPHORE },
{ 32, 0, 0x30, 0, NV10_PFIFO_CACHE1_DMA_SUBROUTINE },
{}
},
.write = nv17_chan_ramfc_write,
.clear = nv04_chan_ramfc_clear,
.ctxdma = true,
};
static const struct nvkm_chan_func
nv17_chan = {
.inst = &nv04_chan_inst,
.userd = &nv04_chan_userd,
.ramfc = &nv17_chan_ramfc,
.start = nv04_chan_start,
.stop = nv04_chan_stop,
};
static void
nv17_fifo_init(struct nvkm_fifo *fifo)
{
struct nvkm_device *device = fifo->engine.subdev.device;
struct nvkm_instmem *imem = device->imem;
struct nvkm_ramht *ramht = imem->ramht;
struct nvkm_memory *ramro = imem->ramro;
struct nvkm_memory *ramfc = imem->ramfc;
nvkm_wr32(device, NV04_PFIFO_DELAY_0, 0x000000ff);
nvkm_wr32(device, NV04_PFIFO_DMA_TIMESLICE, 0x0101ffff);
nvkm_wr32(device, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ |
((ramht->bits - 9) << 16) |
(ramht->gpuobj->addr >> 8));
nvkm_wr32(device, NV03_PFIFO_RAMRO, nvkm_memory_addr(ramro) >> 8);
nvkm_wr32(device, NV03_PFIFO_RAMFC, nvkm_memory_addr(ramfc) >> 8 |
0x00010000);
nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->chid->mask);
nvkm_wr32(device, NV03_PFIFO_INTR_0, 0xffffffff);
Annotation
- Immediate include surface: `priv.h`, `cgrp.h`, `chan.h`, `chid.h`, `runl.h`, `regsnv04.h`, `core/ramht.h`, `subdev/instmem.h`.
- Detected declarations: `function files`, `function nv17_fifo_init`, `function nv17_fifo_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.