drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
Extension
.c
Size
7406 bytes
Lines
253
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.

Dependency Surface

Detected Declarations

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/fb.h>
#include <subdev/instmem.h>

#include <nvif/class.h>

static int
nv40_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 * 128;

	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 + 0x18, 0x30000000 |
				      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_wo32(ramfc, base + 0x3c, 0x0001ffff);
	nvkm_done(ramfc);
	return 0;
}

static const struct nvkm_chan_func_ramfc
nv40_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 },
		{ 32,  0, 0x0c,  0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
		{ 32,  0, 0x10,  0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
		{ 32,  0, 0x14,  0, NV04_PFIFO_CACHE1_DMA_STATE },
		{ 28,  0, 0x18,  0, NV04_PFIFO_CACHE1_DMA_FETCH },
		{  2, 28, 0x18, 28, 0x002058 },
		{ 32,  0, 0x1c,  0, NV04_PFIFO_CACHE1_ENGINE },
		{ 32,  0, 0x20,  0, NV04_PFIFO_CACHE1_PULL1 },
		{ 32,  0, 0x24,  0, NV10_PFIFO_CACHE1_ACQUIRE_VALUE },
		{ 32,  0, 0x28,  0, NV10_PFIFO_CACHE1_ACQUIRE_TIMESTAMP },
		{ 32,  0, 0x2c,  0, NV10_PFIFO_CACHE1_ACQUIRE_TIMEOUT },
		{ 32,  0, 0x30,  0, NV10_PFIFO_CACHE1_SEMAPHORE },
		{ 32,  0, 0x34,  0, NV10_PFIFO_CACHE1_DMA_SUBROUTINE },
		{ 32,  0, 0x38,  0, NV40_PFIFO_GRCTX_INSTANCE },
		{ 17,  0, 0x3c,  0, NV04_PFIFO_DMA_TIMESLICE },
		{ 32,  0, 0x40,  0, 0x0032e4 },
		{ 32,  0, 0x44,  0, 0x0032e8 },
		{ 32,  0, 0x4c,  0, 0x002088 },
		{ 32,  0, 0x50,  0, 0x003300 },
		{ 32,  0, 0x54,  0, 0x00330c },
		{}
	},
	.write = nv40_chan_ramfc_write,
	.clear = nv04_chan_ramfc_clear,
	.ctxdma = true,
};

static const struct nvkm_chan_func_userd
nv40_chan_userd = {
	.bar = NVKM_BAR0_PRI,
	.base = 0xc00000,
	.size = 0x001000,
};

static const struct nvkm_chan_func
nv40_chan = {
	.inst = &nv04_chan_inst,
	.userd = &nv40_chan_userd,
	.ramfc = &nv40_chan_ramfc,
	.start = nv04_chan_start,
	.stop = nv04_chan_stop,
};

static int
nv40_eobj_ramht_add(struct nvkm_engn *engn, struct nvkm_object *eobj, struct nvkm_chan *chan)
{
	struct nvkm_fifo *fifo = chan->cgrp->runl->fifo;

Annotation

Implementation Notes