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

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/falcon/base.c
Extension
.c
Size
8767 bytes
Lines
339
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

while (len >= dmalen) {
			dma->xfer(falcon, dst, src - dma_start, cmd);

			if (img && nvkm_printk_ok(falcon->owner, falcon->user, NV_DBG_TRACE)) {
				for (i = 0; i < dmalen; i += 4, mem_base += 4) {
					const int w = 8, x = (i / 4) % w;

					if (x == 0)
						printk(KERN_INFO "%s %08x <-", type, mem_base);
					printk(KERN_CONT " %08x", *(u32 *)(img + src + i));
					if (x == (w - 1) || ((i + 4) == dmalen))
						printk(KERN_CONT " <- %08x+%08x", dma_base,
						       src + i - dma_base - (x * 4));
					if (i == (7 * 4))
						printk(KERN_CONT " *");
				}
			}

			if (nvkm_msec(falcon->owner->device, 2000,
				if (dma->done(falcon))
					break;
			) < 0)
				return -ETIMEDOUT;

			src += dmalen;
			dst += dmalen;
			len -= dmalen;
		}
		WARN_ON(len);
	}

	return 0;
}

static const struct nvkm_falcon_func_pio *
nvkm_falcon_pio(struct nvkm_falcon *falcon, enum nvkm_falcon_mem *mem_type, u32 *mem_base)
{
	switch (*mem_type) {
	case IMEM:
		return falcon->func->imem_pio;
	case DMEM:
		if (!falcon->func->emem_addr || *mem_base < falcon->func->emem_addr)
			return falcon->func->dmem_pio;

		*mem_base -= falcon->func->emem_addr;
		fallthrough;
	case EMEM:
		return falcon->func->emem_pio;
	default:
		return NULL;
	}
}

int
nvkm_falcon_pio_rd(struct nvkm_falcon *falcon, u8 port, enum nvkm_falcon_mem mem_type, u32 mem_base,
		   const u8 *img, u32 img_base, int len)
{
	const struct nvkm_falcon_func_pio *pio = nvkm_falcon_pio(falcon, &mem_type, &mem_base);
	const char *type = nvkm_falcon_mem(mem_type);
	int xfer_len;

	if (WARN_ON(!pio || !pio->rd))
		return -EINVAL;

	FLCN_DBG(falcon, "%s %08x -> %08x bytes at %08x", type, mem_base, len, img_base);
	if (WARN_ON(!len || (len & (pio->min - 1))))
		return -EINVAL;

	pio->rd_init(falcon, port, mem_base);
	do {
		xfer_len = min(len, pio->max);
		pio->rd(falcon, port, img, xfer_len);

		if (nvkm_printk_ok(falcon->owner, falcon->user, NV_DBG_TRACE)) {
			for (img_base = 0; img_base < xfer_len; img_base += 4, mem_base += 4) {
				if (((img_base / 4) % 8) == 0)
					printk(KERN_INFO "%s %08x ->", type, mem_base);
				printk(KERN_CONT " %08x", *(u32 *)(img + img_base));
			}
		}

		img += xfer_len;
		len -= xfer_len;
	} while (len);

	return 0;
}

int
nvkm_falcon_pio_wr(struct nvkm_falcon *falcon, const u8 *img, u32 img_base, u8 port,

Annotation

Implementation Notes