drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf108.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf108.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf108.c
Extension
.c
Size
2035 bytes
Lines
61
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 "ram.h"

u32
gf108_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
			   struct nvkm_device *device, int fbp, int *pltcs)
{
	u32 fbpt  = nvkm_rd32(device, 0x022438);
	u32 fbpat = nvkm_rd32(device, 0x02243c);
	u32 fbpas = fbpat / fbpt;
	u32 fbpa  = fbp * fbpas;
	u32 size  = 0;
	while (fbpas--) {
		if (!(fbpao & BIT(fbpa)))
			size += func->probe_fbpa_amount(device, fbpa);
		fbpa++;
	}
	*pltcs = 1;
	return size;
}

static const struct nvkm_ram_func
gf108_ram = {
	.upper = 0x0200000000ULL,
	.probe_fbp = gf100_ram_probe_fbp,
	.probe_fbp_amount = gf108_ram_probe_fbp_amount,
	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
	.init = gf100_ram_init,
	.calc = gf100_ram_calc,
	.prog = gf100_ram_prog,
	.tidy = gf100_ram_tidy,
};

int
gf108_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
{
	return gf100_ram_new_(&gf108_ram, fb, pram);
}

Annotation

Implementation Notes