drm/tegra: gem: Use iommu_map_sg()
The iommu_map_sg() function is now available in the IOMMU API, so drop
the open-coded variant.
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 8777b7f..1ccde09 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -92,36 +92,6 @@
.kunmap = tegra_bo_kunmap,
};
-/*
- * A generic iommu_map_sg() function is being reviewed and will hopefully be
- * merged soon. At that point this function can be dropped in favour of the
- * one provided by the IOMMU API.
- */
-static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
- struct scatterlist *sg, unsigned int nents,
- int prot)
-{
- struct scatterlist *s;
- size_t offset = 0;
- unsigned int i;
- int err;
-
- for_each_sg(sg, s, nents, i) {
- phys_addr_t phys = page_to_phys(sg_page(s));
- size_t length = s->offset + s->length;
-
- err = iommu_map(domain, iova + offset, phys, length, prot);
- if (err < 0) {
- iommu_unmap(domain, iova, offset);
- return err;
- }
-
- offset += length;
- }
-
- return offset;
-}
-
static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
{
int prot = IOMMU_READ | IOMMU_WRITE;
@@ -144,8 +114,8 @@
bo->paddr = bo->mm->start;
- err = __iommu_map_sg(tegra->domain, bo->paddr, bo->sgt->sgl,
- bo->sgt->nents, prot);
+ err = iommu_map_sg(tegra->domain, bo->paddr, bo->sgt->sgl,
+ bo->sgt->nents, prot);
if (err < 0) {
dev_err(tegra->drm->dev, "failed to map buffer: %zd\n", err);
goto remove;