drivers/gpu/drm/v3d/v3d_fence.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/v3d/v3d_fence.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/v3d/v3d_fence.c
Extension
.c
Size
1094 bytes
Lines
51
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

// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2017-2018 Broadcom */

#include "v3d_drv.h"

struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue q)
{
	struct v3d_queue_state *queue = &v3d->queue[q];
	struct v3d_fence *fence;

	fence = kzalloc_obj(*fence);
	if (!fence)
		return ERR_PTR(-ENOMEM);

	fence->dev = &v3d->drm;
	fence->queue = q;
	fence->seqno = ++queue->emit_seqno;
	dma_fence_init(&fence->base, &v3d_fence_ops, &queue->queue_lock,
		       queue->fence_context, fence->seqno);

	return &fence->base;
}

static const char *v3d_fence_get_driver_name(struct dma_fence *fence)
{
	return "v3d";
}

static const char *v3d_fence_get_timeline_name(struct dma_fence *fence)
{
	struct v3d_fence *f = to_v3d_fence(fence);

	switch (f->queue) {
	case V3D_BIN:
		return "v3d-bin";
	case V3D_RENDER:
		return "v3d-render";
	case V3D_TFU:
		return "v3d-tfu";
	case V3D_CSD:
		return "v3d-csd";
	default:
		return NULL;
	}
}

const struct dma_fence_ops v3d_fence_ops = {
	.get_driver_name = v3d_fence_get_driver_name,
	.get_timeline_name = v3d_fence_get_timeline_name,
};

Annotation

Implementation Notes