drivers/gpu/drm/nouveau/nvkm/falcon/gp102.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/falcon/gp102.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/falcon/gp102.c
Extension
.c
Size
2496 bytes
Lines
83
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"

static void
gp102_flcn_pio_emem_rd(struct nvkm_falcon *falcon, u8 port, const u8 *img, int len)
{
	while (len >= 4) {
		*(u32 *)img = nvkm_falcon_rd32(falcon, 0xac4 + (port * 8));
		img += 4;
		len -= 4;
	}
}

static void
gp102_flcn_pio_emem_rd_init(struct nvkm_falcon *falcon, u8 port, u32 dmem_base)
{
	nvkm_falcon_wr32(falcon, 0xac0 + (port * 8), BIT(25) | dmem_base);
}

static void
gp102_flcn_pio_emem_wr(struct nvkm_falcon *falcon, u8 port, const u8 *img, int len, u16 tag)
{
	while (len >= 4) {
		nvkm_falcon_wr32(falcon, 0xac4 + (port * 8), *(u32 *)img);
		img += 4;
		len -= 4;
	}
}

static void
gp102_flcn_pio_emem_wr_init(struct nvkm_falcon *falcon, u8 port, bool sec, u32 emem_base)
{
	nvkm_falcon_wr32(falcon, 0xac0 + (port * 8), BIT(24) | emem_base);
}

const struct nvkm_falcon_func_pio
gp102_flcn_emem_pio = {
	.min = 4,
	.max = 0x100,
	.wr_init = gp102_flcn_pio_emem_wr_init,
	.wr = gp102_flcn_pio_emem_wr,
	.rd_init = gp102_flcn_pio_emem_rd_init,
	.rd = gp102_flcn_pio_emem_rd,
};

int
gp102_flcn_reset_eng(struct nvkm_falcon *falcon)
{
	int ret;

	if (falcon->func->reset_prep) {
		ret = falcon->func->reset_prep(falcon);
		if (ret)
			return ret;
	}

	nvkm_falcon_mask(falcon, 0x3c0, 0x00000001, 0x00000001);
	udelay(10);
	nvkm_falcon_mask(falcon, 0x3c0, 0x00000001, 0x00000000);

	return falcon->func->reset_wait_mem_scrubbing(falcon);
}

Annotation

Implementation Notes