drm/nouveau: assign fence_chan->name correctly
Make nouveau_fence_chan refcounted, to make trace_fence_destroy
always return the correct name without a race condition.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index dfd0b9e..dba1f7e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -101,6 +101,18 @@
}
static void
+nouveau_fence_context_put(struct kref *fence_ref)
+{
+ kfree(container_of(fence_ref, struct nouveau_fence_chan, fence_ref));
+}
+
+void
+nouveau_fence_context_free(struct nouveau_fence_chan *fctx)
+{
+ kref_put(&fctx->fence_ref, nouveau_fence_context_put);
+}
+
+static void
nouveau_fence_update(struct nouveau_channel *chan, struct nouveau_fence_chan *fctx)
{
struct nouveau_fence *fence;
@@ -141,6 +153,7 @@
nouveau_fence_context_new(struct nouveau_channel *chan, struct nouveau_fence_chan *fctx)
{
struct nouveau_fence_priv *priv = (void*)chan->drm->fence;
+ struct nouveau_cli *cli = (void *)nvif_client(chan->object);
int ret;
INIT_LIST_HEAD(&fctx->flip);
@@ -148,6 +161,14 @@
spin_lock_init(&fctx->lock);
fctx->context = priv->context_base + chan->chid;
+ if (chan == chan->drm->cechan)
+ strcpy(fctx->name, "copy engine channel");
+ else if (chan == chan->drm->channel)
+ strcpy(fctx->name, "generic kernel channel");
+ else
+ strcpy(fctx->name, nvkm_client(&cli->base)->name);
+
+ kref_init(&fctx->fence_ref);
if (!priv->uevent)
return;
@@ -230,6 +251,7 @@
else
fence_init(&fence->base, &nouveau_fence_ops_legacy,
&fctx->lock, fctx->context, ++fctx->sequence);
+ kref_get(&fctx->fence_ref);
trace_fence_emit(&fence->base);
ret = fctx->emit(fence);
@@ -480,13 +502,22 @@
return true;
}
+static void nouveau_fence_release(struct fence *f)
+{
+ struct nouveau_fence *fence = from_fence(f);
+ struct nouveau_fence_chan *fctx = nouveau_fctx(fence);
+
+ kref_put(&fctx->fence_ref, nouveau_fence_context_put);
+ fence_free(&fence->base);
+}
+
static const struct fence_ops nouveau_fence_ops_legacy = {
.get_driver_name = nouveau_fence_get_get_driver_name,
.get_timeline_name = nouveau_fence_get_timeline_name,
.enable_signaling = nouveau_fence_no_signaling,
.signaled = nouveau_fence_is_signaled,
.wait = nouveau_fence_wait_legacy,
- .release = NULL
+ .release = nouveau_fence_release
};
static bool nouveau_fence_enable_signaling(struct fence *f)
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.h b/drivers/gpu/drm/nouveau/nouveau_fence.h
index a7dc537..943b0b1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.h
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.h
@@ -30,6 +30,8 @@
struct nouveau_fence_chan {
spinlock_t lock;
+ struct kref fence_ref;
+
struct list_head pending;
struct list_head flip;
@@ -42,7 +44,7 @@
u32 sequence;
u32 context;
- char name[24];
+ char name[32];
struct nvif_notify notify;
int notify_ref;
@@ -63,6 +65,7 @@
void nouveau_fence_context_new(struct nouveau_channel *, struct nouveau_fence_chan *);
void nouveau_fence_context_del(struct nouveau_fence_chan *);
+void nouveau_fence_context_free(struct nouveau_fence_chan *);
int nv04_fence_create(struct nouveau_drm *);
int nv04_fence_mthd(struct nouveau_channel *, u32, u32, u32);
diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c b/drivers/gpu/drm/nouveau/nv04_fence.c
index 4484131..f9859de 100644
--- a/drivers/gpu/drm/nouveau/nv04_fence.c
+++ b/drivers/gpu/drm/nouveau/nv04_fence.c
@@ -67,7 +67,7 @@
struct nv04_fence_chan *fctx = chan->fence;
nouveau_fence_context_del(&fctx->base);
chan->fence = NULL;
- kfree(fctx);
+ nouveau_fence_context_free(&fctx->base);
}
static int
diff --git a/drivers/gpu/drm/nouveau/nv10_fence.c b/drivers/gpu/drm/nouveau/nv10_fence.c
index 737d066..5e1ea1c 100644
--- a/drivers/gpu/drm/nouveau/nv10_fence.c
+++ b/drivers/gpu/drm/nouveau/nv10_fence.c
@@ -63,7 +63,7 @@
nvif_object_fini(&fctx->head[i]);
nvif_object_fini(&fctx->sema);
chan->fence = NULL;
- kfree(fctx);
+ nouveau_fence_context_free(&fctx->base);
}
int
diff --git a/drivers/gpu/drm/nouveau/nv84_fence.c b/drivers/gpu/drm/nouveau/nv84_fence.c
index 1e5017f..41cd1a2 100644
--- a/drivers/gpu/drm/nouveau/nv84_fence.c
+++ b/drivers/gpu/drm/nouveau/nv84_fence.c
@@ -125,7 +125,7 @@
nouveau_bo_vma_del(priv->bo, &fctx->vma);
nouveau_fence_context_del(&fctx->base);
chan->fence = NULL;
- kfree(fctx);
+ nouveau_fence_context_free(&fctx->base);
}
int