3 files changed, 26 insertions, 8 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
index cb86c7e..d923013 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
@@ -329,20 +329,34 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 	/*
 	 * Append a LINK to the submitted command buffer to return to
 	 * the ring buffer.  return_target is the ring target address.
-	 * We need three dwords: event, wait, link.
+	 * We need at most 7 dwords in the return target: 2 cache flush +
+	 * 2 semaphore stall + 1 event + 1 wait + 1 link.
 	 */
-	return_dwords = 3;
+	return_dwords = 7;
 	return_target = etnaviv_buffer_reserve(gpu, buffer, return_dwords);
 	CMD_LINK(cmdbuf, return_dwords, return_target);
 
 	/*
-	 * Append event, wait and link pointing back to the wait
-	 * command to the ring buffer.
+	 * Append a cache flush, stall, event, wait and link pointing back to
+	 * the wait command to the ring buffer.
 	 */
+	if (gpu->exec_state == ETNA_PIPE_2D) {
+		CMD_LOAD_STATE(buffer, VIVS_GL_FLUSH_CACHE,
+				       VIVS_GL_FLUSH_CACHE_PE2D);
+	} else {
+		CMD_LOAD_STATE(buffer, VIVS_GL_FLUSH_CACHE,
+				       VIVS_GL_FLUSH_CACHE_DEPTH |
+				       VIVS_GL_FLUSH_CACHE_COLOR);
+		CMD_LOAD_STATE(buffer, VIVS_TS_FLUSH_CACHE,
+				       VIVS_TS_FLUSH_CACHE_FLUSH);
+	}
+	CMD_SEM(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
+	CMD_STALL(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
 	CMD_LOAD_STATE(buffer, VIVS_GL_EVENT, VIVS_GL_EVENT_EVENT_ID(event) |
 		       VIVS_GL_EVENT_FROM_PE);
 	CMD_WAIT(buffer);
-	CMD_LINK(buffer, 2, return_target + 8);
+	CMD_LINK(buffer, 2, etnaviv_iommu_get_cmdbuf_va(gpu, buffer) +
+			    buffer->user_size - 4);
 
 	if (drm_debug & DRM_UT_DRIVER)
 		pr_info("stream link to 0x%08x @ 0x%08x %p\n",
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
index 5ce3603..0370b84 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -748,19 +748,22 @@ static struct page **etnaviv_gem_userptr_do_get_pages(
 	int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
 	struct page **pvec;
 	uintptr_t ptr;
+	unsigned int flags = 0;
 
 	pvec = drm_malloc_ab(npages, sizeof(struct page *));
 	if (!pvec)
 		return ERR_PTR(-ENOMEM);
 
+	if (!etnaviv_obj->userptr.ro)
+		flags |= FOLL_WRITE;
+
 	pinned = 0;
 	ptr = etnaviv_obj->userptr.ptr;
 
 	down_read(&mm->mmap_sem);
 	while (pinned < npages) {
 		ret = get_user_pages_remote(task, mm, ptr, npages - pinned,
-					    !etnaviv_obj->userptr.ro, 0,
-					    pvec + pinned, NULL);
+					    flags, pvec + pinned, NULL);
 		if (ret < 0)
 			break;
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index d3796ed..169ac96 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -330,7 +330,8 @@ u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
 			return (u32)buf->vram_node.start;
 
 		mutex_lock(&mmu->lock);
-		ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node, buf->size);
+		ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node,
+					      buf->size + SZ_64K);
 		if (ret < 0) {
 			mutex_unlock(&mmu->lock);
 			return 0;