drivers/gpu/drm/nouveau/nvkm/subdev/bus/g94.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/bus/g94.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/bus/g94.c
Extension
.c
Size
2148 bytes
Lines
66
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 <subdev/timer.h>

static int
g94_bus_hwsq_exec(struct nvkm_bus *bus, u32 *data, u32 size)
{
	struct nvkm_device *device = bus->subdev.device;
	int i;

	nvkm_mask(device, 0x001098, 0x00000008, 0x00000000);
	nvkm_wr32(device, 0x001304, 0x00000000);
	nvkm_wr32(device, 0x001318, 0x00000000);
	for (i = 0; i < size; i++)
		nvkm_wr32(device, 0x080000 + (i * 4), data[i]);
	nvkm_mask(device, 0x001098, 0x00000018, 0x00000018);
	nvkm_wr32(device, 0x00130c, 0x00000001);

	if (nvkm_msec(device, 2000,
		if (!(nvkm_rd32(device, 0x001308) & 0x00000100))
			break;
	) < 0)
		return -ETIMEDOUT;

	return 0;
}

static const struct nvkm_bus_func
g94_bus = {
	.init = nv50_bus_init,
	.intr = nv50_bus_intr,
	.hwsq_exec = g94_bus_hwsq_exec,
	.hwsq_size = 128,
};

int
g94_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
	    struct nvkm_bus **pbus)
{
	return nvkm_bus_new_(&g94_bus, device, type, inst, pbus);
}

Annotation

Implementation Notes