drm/nv84-/fence: prepare for emit/sync support of sysram sequences

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -561,7 +561,7 @@ nouveau_bo_move_accel_cleanup(struct nouveau_channel *chan,
 	struct nouveau_fence *fence = NULL;
 	int ret;
 
-	ret = nouveau_fence_new(chan, &fence);
+	ret = nouveau_fence_new(chan, false, &fence);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/nouveau/nouveau_chan.c

@@ -51,7 +51,7 @@ nouveau_channel_idle(struct nouveau_channel *chan)
 	struct nouveau_fence *fence = NULL;
 	int ret;
 
-	ret = nouveau_fence_new(chan, &fence);
+	ret = nouveau_fence_new(chan, false, &fence);
 	if (!ret) {
 		ret = nouveau_fence_wait(fence, false, false);
 		nouveau_fence_unref(&fence);

drivers/gpu/drm/nouveau/nouveau_display.c

@@ -540,7 +540,7 @@ nouveau_page_flip_emit(struct nouveau_channel *chan,
 	}
 	FIRE_RING (chan);
 
-	ret = nouveau_fence_new(chan, pfence);
+	ret = nouveau_fence_new(chan, false, pfence);
 	if (ret)
 		goto fail;
 

drivers/gpu/drm/nouveau/nouveau_fence.c

@@ -41,8 +41,6 @@ nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
 	struct nouveau_fence *fence, *fnext;
 	spin_lock(&fctx->lock);
 	list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
-		if (fence->work)
-			fence->work(fence->priv, false);
 		fence->channel = NULL;
 		list_del(&fence->head);
 		nouveau_fence_unref(&fence);
@@ -69,8 +67,6 @@ nouveau_fence_update(struct nouveau_channel *chan)
 		if (fctx->read(chan) < fence->sequence)
 			break;
 
-		if (fence->work)
-			fence->work(fence->priv, true);
 		fence->channel = NULL;
 		list_del(&fence->head);
 		nouveau_fence_unref(&fence);
@@ -256,7 +252,8 @@ nouveau_fence_ref(struct nouveau_fence *fence)
 }
 
 int
-nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **pfence)
+nouveau_fence_new(struct nouveau_channel *chan, bool sysmem,
+		  struct nouveau_fence **pfence)
 {
 	struct nouveau_fence *fence;
 	int ret = 0;
@@ -267,6 +264,8 @@ nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **pfence)
 	fence = kzalloc(sizeof(*fence), GFP_KERNEL);
 	if (!fence)
 		return -ENOMEM;
+
+	fence->sysmem = sysmem;
 	kref_init(&fence->kref);
 
 	ret = nouveau_fence_emit(fence, chan);

drivers/gpu/drm/nouveau/nouveau_fence.h

@@ -7,15 +7,15 @@ struct nouveau_fence {
 	struct list_head head;
 	struct kref kref;
 
+	bool sysmem;
+
 	struct nouveau_channel *channel;
 	unsigned long timeout;
 	u32 sequence;
-
-	void (*work)(void *priv, bool signalled);
-	void *priv;
 };
 
-int  nouveau_fence_new(struct nouveau_channel *, struct nouveau_fence **);
+int  nouveau_fence_new(struct nouveau_channel *, bool sysmem,
+		       struct nouveau_fence **);
 struct nouveau_fence *
 nouveau_fence_ref(struct nouveau_fence *);
 void nouveau_fence_unref(struct nouveau_fence **);
@@ -79,24 +79,18 @@ int nouveau_flip_complete(void *chan);
 struct nv84_fence_chan {
 	struct nouveau_fence_chan base;
 	struct nouveau_vma vma;
+	struct nouveau_vma vma_gart;
 	struct nouveau_vma dispc_vma[4];
 };
 
 struct nv84_fence_priv {
 	struct nouveau_fence_priv base;
 	struct nouveau_bo *bo;
+	struct nouveau_bo *bo_gart;
 	u32 *suspend;
 };
 
 u64  nv84_fence_crtc(struct nouveau_channel *, int);
-int  nv84_fence_emit(struct nouveau_fence *);
-int  nv84_fence_sync(struct nouveau_fence *, struct nouveau_channel *,
-		     struct nouveau_channel *);
-u32  nv84_fence_read(struct nouveau_channel *);
 int  nv84_fence_context_new(struct nouveau_channel *);
-void nv84_fence_context_del(struct nouveau_channel *);
-bool nv84_fence_suspend(struct nouveau_drm *);
-void nv84_fence_resume(struct nouveau_drm *);
-void nv84_fence_destroy(struct nouveau_drm *);
 
 #endif

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -787,7 +787,7 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 		}
 	}
 
-	ret = nouveau_fence_new(chan, &fence);
+	ret = nouveau_fence_new(chan, false, &fence);
 	if (ret) {
 		NV_ERROR(cli, "error fencing pushbuf: %d\n", ret);
 		WIND_RING(chan);

drivers/gpu/drm/nouveau/nv84_fence.c

@@ -76,27 +76,39 @@ nv84_fence_sync32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
 	return ret;
 }
 
-int
+static int
 nv84_fence_emit(struct nouveau_fence *fence)
 {
 	struct nouveau_channel *chan = fence->channel;
 	struct nv84_fence_chan *fctx = chan->fence;
 	struct nouveau_fifo_chan *fifo = (void *)chan->object;
-	u64 addr = fctx->vma.offset + fifo->chid * 16;
+	u64 addr = fifo->chid * 16;
+
+	if (fence->sysmem)
+		addr += fctx->vma_gart.offset;
+	else
+		addr += fctx->vma.offset;
+
 	return fctx->base.emit32(chan, addr, fence->sequence);
 }
 
-int
+static int
 nv84_fence_sync(struct nouveau_fence *fence,
 		struct nouveau_channel *prev, struct nouveau_channel *chan)
 {
 	struct nv84_fence_chan *fctx = chan->fence;
 	struct nouveau_fifo_chan *fifo = (void *)prev->object;
-	u64 addr = fctx->vma.offset + fifo->chid * 16;
+	u64 addr = fifo->chid * 16;
+
+	if (fence->sysmem)
+		addr += fctx->vma_gart.offset;
+	else
+		addr += fctx->vma.offset;
+
 	return fctx->base.sync32(chan, addr, fence->sequence);
 }
 
-u32
+static u32
 nv84_fence_read(struct nouveau_channel *chan)
 {
 	struct nouveau_fifo_chan *fifo = (void *)chan->object;
@@ -104,7 +116,7 @@ nv84_fence_read(struct nouveau_channel *chan)
 	return nouveau_bo_rd32(priv->bo, fifo->chid * 16/4);
 }
 
-void
+static void
 nv84_fence_context_del(struct nouveau_channel *chan)
 {
 	struct drm_device *dev = chan->drm->dev;
@@ -117,6 +129,7 @@ nv84_fence_context_del(struct nouveau_channel *chan)
 		nouveau_bo_vma_del(bo, &fctx->dispc_vma[i]);
 	}
 
+	nouveau_bo_vma_del(priv->bo, &fctx->vma_gart);
 	nouveau_bo_vma_del(priv->bo, &fctx->vma);
 	nouveau_fence_context_del(&fctx->base);
 	chan->fence = NULL;
@@ -144,8 +157,10 @@ nv84_fence_context_new(struct nouveau_channel *chan)
 	fctx->base.sync32 = nv84_fence_sync32;
 
 	ret = nouveau_bo_vma_add(priv->bo, client->vm, &fctx->vma);
-	if (ret)
-		nv84_fence_context_del(chan);
+	if (ret == 0) {
+		ret = nouveau_bo_vma_add(priv->bo_gart, client->vm,
+					&fctx->vma_gart);
+	}
 
 	/* map display semaphore buffers into channel's vm */
 	for (i = 0; !ret && i < chan->drm->dev->mode_config.num_crtc; i++) {
@@ -154,10 +169,13 @@ nv84_fence_context_new(struct nouveau_channel *chan)
 	}
 
 	nouveau_bo_wr32(priv->bo, fifo->chid * 16/4, 0x00000000);
+
+	if (ret)
+		nv84_fence_context_del(chan);
 	return ret;
 }
 
-bool
+static bool
 nv84_fence_suspend(struct nouveau_drm *drm)
 {
 	struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
@@ -173,7 +191,7 @@ nv84_fence_suspend(struct nouveau_drm *drm)
 	return priv->suspend != NULL;
 }
 
-void
+static void
 nv84_fence_resume(struct nouveau_drm *drm)
 {
 	struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
@@ -188,10 +206,14 @@ nv84_fence_resume(struct nouveau_drm *drm)
 	}
 }
 
-void
+static void
 nv84_fence_destroy(struct nouveau_drm *drm)
 {
 	struct nv84_fence_priv *priv = drm->fence;
+	nouveau_bo_unmap(priv->bo_gart);
+	if (priv->bo_gart)
+		nouveau_bo_unpin(priv->bo_gart);
+	nouveau_bo_ref(NULL, &priv->bo_gart);
 	nouveau_bo_unmap(priv->bo);
 	if (priv->bo)
 		nouveau_bo_unpin(priv->bo);
@@ -233,6 +255,21 @@ nv84_fence_create(struct nouveau_drm *drm)
 			nouveau_bo_ref(NULL, &priv->bo);
 	}
 
+	if (ret == 0)
+		ret = nouveau_bo_new(drm->dev, 16 * (pfifo->max + 1), 0,
+				     TTM_PL_FLAG_TT, 0, 0, NULL,
+				     &priv->bo_gart);
+	if (ret == 0) {
+		ret = nouveau_bo_pin(priv->bo_gart, TTM_PL_FLAG_TT);
+		if (ret == 0) {
+			ret = nouveau_bo_map(priv->bo_gart);
+			if (ret)
+				nouveau_bo_unpin(priv->bo_gart);
+		}
+		if (ret)
+			nouveau_bo_ref(NULL, &priv->bo_gart);
+	}
+
 	if (ret)
 		nv84_fence_destroy(drm);
 	return ret;

drivers/gpu/drm/nouveau/nvc0_fence.c

@@ -81,37 +81,10 @@ nvc0_fence_context_new(struct nouveau_channel *chan)
 int
 nvc0_fence_create(struct nouveau_drm *drm)
 {
-	struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
-	struct nv84_fence_priv *priv;
-	int ret;
-
-	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	priv->base.dtor = nv84_fence_destroy;
-	priv->base.suspend = nv84_fence_suspend;
-	priv->base.resume = nv84_fence_resume;
-	priv->base.context_new = nvc0_fence_context_new;
-	priv->base.context_del = nv84_fence_context_del;
-
-	init_waitqueue_head(&priv->base.waiting);
-	priv->base.uevent = true;
-
-	ret = nouveau_bo_new(drm->dev, 16 * (pfifo->max + 1), 0,
-			     TTM_PL_FLAG_VRAM, 0, 0, NULL, &priv->bo);
+	int ret = nv84_fence_create(drm);
 	if (ret == 0) {
-		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
-		if (ret == 0) {
-			ret = nouveau_bo_map(priv->bo);
-			if (ret)
-				nouveau_bo_unpin(priv->bo);
-		}
-		if (ret)
-			nouveau_bo_ref(NULL, &priv->bo);
+		struct nv84_fence_priv *priv = drm->fence;
+		priv->base.context_new = nvc0_fence_context_new;
 	}
-
-	if (ret)
-		nv84_fence_destroy(drm);
 	return ret;
 }