UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Thierry Reding 2014-12-17 16:46:37 +01:00
parent f4c5cf88fb
commit 8c8cb58ed6
1 changed files with 2 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/gpu/drm/tegra/gem.c
View File

@ -92,36 +92,6 @@ static const struct host1x_bo_ops tegra_bo_ops = {
.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 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
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;