drivers/gpu/drm/nouveau/nvkm/subdev/mc/nv04.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/mc/nv04.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/mc/nv04.c
Extension
.c
Size
3760 bytes
Lines
138
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"

const struct nvkm_mc_map
nv04_mc_reset[] = {
	{ 0x00001000, NVKM_ENGINE_GR },
	{ 0x00000100, NVKM_ENGINE_FIFO },
	{}
};

static void
nv04_mc_device_disable(struct nvkm_mc *mc, u32 mask)
{
	nvkm_mask(mc->subdev.device, 0x000200, mask, 0x00000000);
}

static void
nv04_mc_device_enable(struct nvkm_mc *mc, u32 mask)
{
	struct nvkm_device *device = mc->subdev.device;

	nvkm_mask(device, 0x000200, mask, mask);
	nvkm_rd32(device, 0x000200);
}

static bool
nv04_mc_device_enabled(struct nvkm_mc *mc, u32 mask)
{
	return (nvkm_rd32(mc->subdev.device, 0x000200) & mask) == mask;
}

const struct nvkm_mc_device_func
nv04_mc_device = {
	.enabled = nv04_mc_device_enabled,
	.enable = nv04_mc_device_enable,
	.disable = nv04_mc_device_disable,
};

static const struct nvkm_intr_data
nv04_mc_intrs[] = {
	{ NVKM_ENGINE_DISP , 0, 0, 0x01010000, true },
	{ NVKM_ENGINE_GR   , 0, 0, 0x00001000, true },
	{ NVKM_ENGINE_FIFO , 0, 0, 0x00000100 },
	{ NVKM_SUBDEV_BUS  , 0, 0, 0x10000000, true },
	{ NVKM_SUBDEV_TIMER, 0, 0, 0x00100000, true },
	{}
};

void
nv04_mc_intr_rearm(struct nvkm_intr *intr)
{
	struct nvkm_mc *mc = container_of(intr, typeof(*mc), intr);
	int leaf;

	for (leaf = 0; leaf < intr->leaves; leaf++)
		nvkm_wr32(mc->subdev.device, 0x000140 + (leaf * 4), 0x00000001);
}

void
nv04_mc_intr_unarm(struct nvkm_intr *intr)
{
	struct nvkm_mc *mc = container_of(intr, typeof(*mc), intr);
	int leaf;

	for (leaf = 0; leaf < intr->leaves; leaf++)
		nvkm_wr32(mc->subdev.device, 0x000140 + (leaf * 4), 0x00000000);

	nvkm_rd32(mc->subdev.device, 0x000140);
}

bool
nv04_mc_intr_pending(struct nvkm_intr *intr)
{
	struct nvkm_mc *mc = container_of(intr, typeof(*mc), intr);
	bool pending = false;
	int leaf;

	for (leaf = 0; leaf < intr->leaves; leaf++) {
		intr->stat[leaf] = nvkm_rd32(mc->subdev.device, 0x000100 + (leaf * 4));
		if (intr->stat[leaf])
			pending = true;
	}

	return pending;
}

const struct nvkm_intr_func
nv04_mc_intr = {
	.pending = nv04_mc_intr_pending,
	.unarm = nv04_mc_intr_unarm,
	.rearm = nv04_mc_intr_rearm,

Annotation

Implementation Notes