drivers/gpu/drm/nouveau/nv10_fence.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nv10_fence.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nv10_fence.c
Extension
.c
Size
2883 bytes
Lines
109
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 "nouveau_drv.h"
#include "nouveau_dma.h"
#include "nv10_fence.h"

#include <nvif/push006c.h>

#include <nvhw/class/cl006e.h>

int
nv10_fence_emit(struct nouveau_fence *fence)
{
	struct nvif_push *push = &fence->channel->chan.push;
	int ret = PUSH_WAIT(push, 2);
	if (ret == 0) {
		PUSH_MTHD(push, NV06E, SET_REFERENCE, fence->base.seqno);
		PUSH_KICK(push);
	}
	return ret;
}


static int
nv10_fence_sync(struct nouveau_fence *fence,
		struct nouveau_channel *prev, struct nouveau_channel *chan)
{
	return -ENODEV;
}

u32
nv10_fence_read(struct nouveau_channel *chan)
{
	return NVIF_RD32(&chan->user, NV06E, REFERENCE);
}

void
nv10_fence_context_del(struct nouveau_channel *chan)
{
	struct nv10_fence_chan *fctx = chan->fence;
	nouveau_fence_context_del(&fctx->base);
	nvif_object_dtor(&fctx->sema);
	chan->fence = NULL;
	nouveau_fence_context_free(&fctx->base);
}

static int
nv10_fence_context_new(struct nouveau_channel *chan)
{
	struct nv10_fence_chan *fctx;

	fctx = chan->fence = kzalloc_obj(*fctx);
	if (!fctx)
		return -ENOMEM;

	nouveau_fence_context_new(chan, &fctx->base);
	fctx->base.emit = nv10_fence_emit;
	fctx->base.read = nv10_fence_read;
	fctx->base.sync = nv10_fence_sync;
	return 0;
}

void
nv10_fence_destroy(struct nouveau_drm *drm)
{
	struct nv10_fence_priv *priv = drm->fence;

	nouveau_bo_unpin_del(&priv->bo);
	drm->fence = NULL;
	kfree(priv);
}

int
nv10_fence_create(struct nouveau_drm *drm)
{
	struct nv10_fence_priv *priv;

	priv = drm->fence = kzalloc_obj(*priv);
	if (!priv)
		return -ENOMEM;

	priv->base.dtor = nv10_fence_destroy;
	priv->base.context_new = nv10_fence_context_new;
	priv->base.context_del = nv10_fence_context_del;
	spin_lock_init(&priv->lock);
	return 0;
}

Annotation

Implementation Notes