drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
Extension
.c
Size
7547 bytes
Lines
247
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

if (fault->buffer[0]) {
			nvkm_event_ntfy(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING);
			stat &= ~0x20000000;
		}
	}

	if (stat & 0x08000000) {
		if (fault->buffer[1]) {
			nvkm_event_ntfy(&fault->event, 1, NVKM_FAULT_BUFFER_EVENT_PENDING);
			stat &= ~0x08000000;
		}
	}

	if (stat) {
		nvkm_debug(subdev, "intr %08x\n", stat);
	}
}

static void
gv100_fault_fini(struct nvkm_fault *fault)
{
	nvkm_event_ntfy_block(&fault->nrpfb);
	flush_work(&fault->nrpfb_work);

	if (fault->buffer[0])
		fault->func->buffer.fini(fault->buffer[0]);

	nvkm_mask(fault->subdev.device, 0x100a34, 0x80000000, 0x80000000);
}

static void
gv100_fault_init(struct nvkm_fault *fault)
{
	nvkm_mask(fault->subdev.device, 0x100a2c, 0x80000000, 0x80000000);
	fault->func->buffer.init(fault->buffer[0]);
	nvkm_event_ntfy_allow(&fault->nrpfb);
}

int
gv100_fault_oneinit(struct nvkm_fault *fault)
{
	nvkm_event_ntfy_add(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING, true,
			    gv100_fault_ntfy_nrpfb, &fault->nrpfb);
	return 0;
}

static const struct nvkm_fault_func
gv100_fault = {
	.oneinit = gv100_fault_oneinit,
	.init = gv100_fault_init,
	.fini = gv100_fault_fini,
	.intr = gv100_fault_intr,
	.buffer.nr = 2,
	.buffer.entry_size = 32,
	.buffer.info = gv100_fault_buffer_info,
	.buffer.pin = gp100_fault_buffer_pin,
	.buffer.init = gv100_fault_buffer_init,
	.buffer.fini = gv100_fault_buffer_fini,
	.buffer.intr = gv100_fault_buffer_intr,
	/*TODO: Figure out how to expose non-replayable fault buffer, which,
	 *      for some reason, is where recoverable CE faults appear...
	 *
	 * 	It's a bit tricky, as both NVKM and SVM will need access to
	 * 	the non-replayable fault buffer.
	 */
	.user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
};

int
gv100_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
		struct nvkm_fault **pfault)
{
	int ret = nvkm_fault_new_(&gv100_fault, device, type, inst, pfault);
	if (ret)
		return ret;

	INIT_WORK(&(*pfault)->nrpfb_work, gv100_fault_buffer_process);
	return 0;
}

Annotation

Implementation Notes