3 files changed, 28 insertions, 30 deletions

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index a43a836e6..07b26972f 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -56,15 +56,14 @@ static inline struct tegra_dpaux *work_to_dpaux(struct work_struct *work)
 	return container_of(work, struct tegra_dpaux, work);
 }
 
-static inline unsigned long tegra_dpaux_readl(struct tegra_dpaux *dpaux,
-					      unsigned long offset)
+static inline u32 tegra_dpaux_readl(struct tegra_dpaux *dpaux,
+				    unsigned long offset)
 {
 	return readl(dpaux->regs + (offset << 2));
 }
 
 static inline void tegra_dpaux_writel(struct tegra_dpaux *dpaux,
-				      unsigned long value,
-				      unsigned long offset)
+				      u32 value, unsigned long offset)
 {
 	writel(value, dpaux->regs + (offset << 2));
 }
@@ -76,7 +75,7 @@ static void tegra_dpaux_write_fifo(struct tegra_dpaux *dpaux, const u8 *buffer,
 
 	for (i = 0; i < DIV_ROUND_UP(size, 4); i++) {
 		size_t num = min_t(size_t, size - i * 4, 4);
-		unsigned long value = 0;
+		u32 value = 0;
 
 		for (j = 0; j < num; j++)
 			value |= buffer[i * 4 + j] << (j * 8);
@@ -92,7 +91,7 @@ static void tegra_dpaux_read_fifo(struct tegra_dpaux *dpaux, u8 *buffer,
 
 	for (i = 0; i < DIV_ROUND_UP(size, 4); i++) {
 		size_t num = min_t(size_t, size - i * 4, 4);
-		unsigned long value;
+		u32 value;
 
 		value = tegra_dpaux_readl(dpaux, DPAUX_DP_AUXDATA_READ(i));
 
@@ -248,7 +247,7 @@ static irqreturn_t tegra_dpaux_irq(int irq, void *data)
 {
 	struct tegra_dpaux *dpaux = data;
 	irqreturn_t ret = IRQ_HANDLED;
-	unsigned long value;
+	u32 value;
 
 	/* clear interrupts */
 	value = tegra_dpaux_readl(dpaux, DPAUX_INTR_AUX);
@@ -271,7 +270,7 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
 {
 	struct tegra_dpaux *dpaux;
 	struct resource *regs;
-	unsigned long value;
+	u32 value;
 	int err;
 
 	dpaux = devm_kzalloc(&pdev->dev, sizeof(*dpaux), GFP_KERNEL);
@@ -463,7 +462,7 @@ int tegra_dpaux_detach(struct tegra_dpaux *dpaux)
 
 enum drm_connector_status tegra_dpaux_detect(struct tegra_dpaux *dpaux)
 {
-	unsigned long value;
+	u32 value;
 
 	value = tegra_dpaux_readl(dpaux, DPAUX_DP_AUXSTAT);
 
@@ -475,7 +474,7 @@ enum drm_connector_status tegra_dpaux_detect(struct tegra_dpaux *dpaux)
 
 int tegra_dpaux_enable(struct tegra_dpaux *dpaux)
 {
-	unsigned long value;
+	u32 value;
 
 	value = DPAUX_HYBRID_PADCTL_AUX_CMH(2) |
 		DPAUX_HYBRID_PADCTL_AUX_DRVZ(4) |
@@ -493,7 +492,7 @@ int tegra_dpaux_enable(struct tegra_dpaux *dpaux)
 
 int tegra_dpaux_disable(struct tegra_dpaux *dpaux)
 {
-	unsigned long value;
+	u32 value;
 
 	value = tegra_dpaux_readl(dpaux, DPAUX_HYBRID_SPARE);
 	value |= DPAUX_HYBRID_SPARE_PAD_POWER_DOWN;
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index bfad15a91..427f50c68 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -124,14 +124,22 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 		return -ENOMEM;
 
 	if (iommu_present(&platform_bus_type)) {
+		struct iommu_domain_geometry *geometry;
+		u64 start, end;
+
 		tegra->domain = iommu_domain_alloc(&platform_bus_type);
 		if (!tegra->domain) {
 			err = -ENOMEM;
 			goto free;
 		}
 
-		DRM_DEBUG("IOMMU context initialized\n");
-		drm_mm_init(&tegra->mm, 0, SZ_2G);
+		geometry = &tegra->domain->geometry;
+		start = geometry->aperture_start;
+		end = geometry->aperture_end;
+
+		DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
+			  start, end);
+		drm_mm_init(&tegra->mm, start, end - start + 1);
 	}
 
 	mutex_init(&tegra->clients_lock);
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 1217272a5..01e16e146 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -189,7 +189,6 @@ static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo)
 static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo)
 {
 	struct scatterlist *s;
-	struct sg_table *sgt;
 	unsigned int i;
 
 	bo->pages = drm_gem_get_pages(&bo->gem);
@@ -198,36 +197,28 @@ static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo)
 
 	bo->num_pages = bo->gem.size >> PAGE_SHIFT;
 
-	sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages);
-	if (IS_ERR(sgt))
+	bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages);
+	if (IS_ERR(bo->sgt))
 		goto put_pages;
 
 	/*
-	 * Fake up the SG table so that dma_map_sg() can be used to flush the
-	 * pages associated with it. Note that this relies on the fact that
-	 * the DMA API doesn't hook into IOMMU on Tegra, therefore mapping is
-	 * only cache maintenance.
+	 * Fake up the SG table so that dma_sync_sg_for_device() can be used
+	 * to flush the pages associated with it.
 	 *
 	 * TODO: Replace this by drm_clflash_sg() once it can be implemented
 	 * without relying on symbols that are not exported.
 	 */
-	for_each_sg(sgt->sgl, s, sgt->nents, i)
+	for_each_sg(bo->sgt->sgl, s, bo->sgt->nents, i)
 		sg_dma_address(s) = sg_phys(s);
 
-	if (dma_map_sg(drm->dev, sgt->sgl, sgt->nents, DMA_TO_DEVICE) == 0)
-		goto release_sgt;
-
-	bo->sgt = sgt;
+	dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents,
+			       DMA_TO_DEVICE);
 
 	return 0;
 
-release_sgt:
-	sg_free_table(sgt);
-	kfree(sgt);
-	sgt = ERR_PTR(-ENOMEM);
 put_pages:
 	drm_gem_put_pages(&bo->gem, bo->pages, false, false);
-	return PTR_ERR(sgt);
+	return PTR_ERR(bo->sgt);
 }
 
 static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)