drm/nouveau: fix semaphore dmabuf obj

Fixes some dmabuf object errors on nv50 chipset and below.

Cc: stable@vger.kernel.org [3.7+]
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

2 files changed, 10 insertions, 6 deletions

diff --git a/drivers/gpu/drm/nouveau/nv17_fence.c b/drivers/gpu/drm/nouveau/nv17_fence.c
index 8e47a9bae8c3..22aa9963ea6f 100644
--- a/drivers/gpu/drm/nouveau/nv17_fence.c
+++ b/drivers/gpu/drm/nouveau/nv17_fence.c
@@ -76,7 +76,7 @@ nv17_fence_context_new(struct nouveau_channel *chan)
         struct ttm_mem_reg *mem = &priv->bo->bo.mem;
         struct nouveau_object *object;
         u32 start = mem->start * PAGE_SIZE;
-        u32 limit = mem->start + mem->size - 1;
+        u32 limit = start + mem->size - 1;
         int ret = 0;
 
         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
diff --git a/drivers/gpu/drm/nouveau/nv50_fence.c b/drivers/gpu/drm/nouveau/nv50_fence.c
index f9701e567db8..0ee363840035 100644
--- a/drivers/gpu/drm/nouveau/nv50_fence.c
+++ b/drivers/gpu/drm/nouveau/nv50_fence.c
@@ -39,6 +39,8 @@ nv50_fence_context_new(struct nouveau_channel *chan)
         struct nv10_fence_chan *fctx;
         struct ttm_mem_reg *mem = &priv->bo->bo.mem;
         struct nouveau_object *object;
+        u32 start = mem->start * PAGE_SIZE;
+        u32 limit = start + mem->size - 1;
         int ret, i;
 
         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
@@ -51,26 +53,28 @@ nv50_fence_context_new(struct nouveau_channel *chan)
         fctx->base.sync = nv17_fence_sync;
 
         ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
-                                 NvSema, 0x0002,
+                                 NvSema, 0x003d,
                                  &(struct nv_dma_class) {
                                         .flags = NV_DMA_TARGET_VRAM |
                                                  NV_DMA_ACCESS_RDWR,
-                                        .start = mem->start * PAGE_SIZE,
-                                        .limit = mem->size - 1,
+                                        .start = start,
+                                        .limit = limit,
                                  }, sizeof(struct nv_dma_class),
                                  &object);
 
         /* dma objects for display sync channel semaphore blocks */
         for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
                 struct nouveau_bo *bo = nv50_display_crtc_sema(dev, i);
+                u32 start = bo->bo.mem.start * PAGE_SIZE;
+                u32 limit = start + bo->bo.mem.size - 1;
 
                 ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
                                          NvEvoSema0 + i, 0x003d,
                                          &(struct nv_dma_class) {
                                                 .flags = NV_DMA_TARGET_VRAM |
                                                          NV_DMA_ACCESS_RDWR,
-                                                .start = bo->bo.offset,
-                                                .limit = bo->bo.offset + 0xfff,
+                                                .start = start,
+                                                .limit = limit,
                                          }, sizeof(struct nv_dma_class),
                                          &object);
         }