drivers/gpu/drm/nouveau/nvkm/subdev/acr/gm200.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/acr/gm200.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/acr/gm200.c
Extension
.c
Size
10261 bytes
Lines
375
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

list_for_each_entry(lsfw, &acr->lsfw, head) {
			if (lsfw->id != hdr.falcon_id)
				continue;

			nvkm_robj(acr->wpr, hdr.lsb_offset, &lsb, sizeof(lsb));
			lsb_header_dump(subdev, &lsb);

			lsfw->func->bld_patch(acr, lsb.tail.bl_data_off, adjust);
			break;
		}
		offset += sizeof(hdr);
	} while (hdr.falcon_id != WPR_HEADER_V0_FALCON_ID_INVALID);

	return 0;
}

void
gm200_acr_wpr_build_lsb_tail(struct nvkm_acr_lsfw *lsfw,
			     struct lsb_header_tail *hdr)
{
	hdr->ucode_off = lsfw->offset.img;
	hdr->ucode_size = lsfw->ucode_size;
	hdr->data_size = lsfw->data_size;
	hdr->bl_code_size = lsfw->bootloader_size;
	hdr->bl_imem_off = lsfw->bootloader_imem_offset;
	hdr->bl_data_off = lsfw->offset.bld;
	hdr->bl_data_size = lsfw->bl_data_size;
	hdr->app_code_off = lsfw->app_start_offset +
			   lsfw->app_resident_code_offset;
	hdr->app_code_size = lsfw->app_resident_code_size;
	hdr->app_data_off = lsfw->app_start_offset +
			   lsfw->app_resident_data_offset;
	hdr->app_data_size = lsfw->app_resident_data_size;
	hdr->flags = lsfw->func->flags;
}

static int
gm200_acr_wpr_build_lsb(struct nvkm_acr *acr, struct nvkm_acr_lsfw *lsfw)
{
	struct lsb_header hdr;

	if (WARN_ON(lsfw->sig->size != sizeof(hdr.signature)))
		return -EINVAL;

	memcpy(&hdr.signature, lsfw->sig->data, lsfw->sig->size);
	gm200_acr_wpr_build_lsb_tail(lsfw, &hdr.tail);

	nvkm_wobj(acr->wpr, lsfw->offset.lsb, &hdr, sizeof(hdr));
	return 0;
}

int
gm200_acr_wpr_build(struct nvkm_acr *acr, struct nvkm_acr_lsf *rtos)
{
	struct nvkm_acr_lsfw *lsfw;
	u32 offset = 0;
	int ret;

	/* Fill per-LSF structures. */
	list_for_each_entry(lsfw, &acr->lsfw, head) {
		struct wpr_header hdr = {
			.falcon_id = lsfw->id,
			.lsb_offset = lsfw->offset.lsb,
			.bootstrap_owner = NVKM_ACR_LSF_PMU,
			.lazy_bootstrap = rtos && lsfw->id != rtos->id,
			.status = WPR_HEADER_V0_STATUS_COPY,
		};

		/* Write WPR header. */
		nvkm_wobj(acr->wpr, offset, &hdr, sizeof(hdr));
		offset += sizeof(hdr);

		/* Write LSB header. */
		ret = gm200_acr_wpr_build_lsb(acr, lsfw);
		if (ret)
			return ret;

		/* Write ucode image. */
		nvkm_wobj(acr->wpr, lsfw->offset.img,
				    lsfw->img.data,
				    lsfw->img.size);

		/* Write bootloader data. */
		lsfw->func->bld_write(acr, lsfw->offset.bld, lsfw);
	}

	/* Finalise WPR. */
	nvkm_wo32(acr->wpr, offset, WPR_HEADER_V0_FALCON_ID_INVALID);
	return 0;
}

Annotation

Implementation Notes