diff mbox series

[V6,4/5] iommu/dma-iommu: Use the dev->coherent_dma_mask

Message ID 20190908165642.22253-5-murphyt7@tcd.ie (mailing list archive)
State New, archived
Headers show
Series iommu/amd: Convert the AMD iommu driver to the dma-iommu api | expand

Commit Message

Tom Murphy Sept. 8, 2019, 4:56 p.m. UTC 
Use the dev->coherent_dma_mask when allocating in the dma-iommu ops api.

Signed-off-by: Tom Murphy <murphyt7@tcd.ie>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 drivers/iommu/dma-iommu.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

Comments

Christoph Hellwig July 10, 2020, 3:59 p.m. UTC | #1 
Btw, what is the current state of converting intel-iommu to the dma-iommu
code?
Tom Murphy July 10, 2020, 7:18 p.m. UTC | #2 
>Btw, what is the current state of converting intel-iommu to the dma-iommu

These changes expose a bug in the i915 intel driver which hasn't been
fixed yet. I don't think anyone is actively working on it but I plan
on merging as many patches as I can so it's easier to do the
intel-iommu -> dma-iommu conversion once the bug is fixed.

You can read more about it here:
https://patchwork.kernel.org/cover/11306999/

On Fri, 10 Jul 2020 at 08:59, Christoph Hellwig <hch@lst.de> wrote:
>
> Btw, what is the current state of converting intel-iommu to the dma-iommu
> code?
diff mbox series

Patch

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index bd09b6b31c4e..0cf52fae1471 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -471,7 +471,7 @@  static void __iommu_dma_unmap(struct device *dev, dma_addr_t dma_addr,
 }
 
 static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
-		size_t size, int prot)
+		size_t size, int prot, dma_addr_t dma_mask)
 {
 	struct iommu_domain *domain = iommu_get_dma_domain(dev);
 	struct iommu_dma_cookie *cookie = domain->iova_cookie;
@@ -484,7 +484,7 @@  static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
 
 	size = iova_align(iovad, size + iova_off);
 
-	iova = iommu_dma_alloc_iova(domain, size, dma_get_mask(dev), dev);
+	iova = iommu_dma_alloc_iova(domain, size, dma_mask, dev);
 	if (!iova)
 		return DMA_MAPPING_ERROR;
 
@@ -735,7 +735,7 @@  static dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
 	int prot = dma_info_to_prot(dir, coherent, attrs);
 	dma_addr_t dma_handle;
 
-	dma_handle = __iommu_dma_map(dev, phys, size, prot);
+	dma_handle = __iommu_dma_map(dev, phys, size, prot, dma_get_mask(dev));
 	if (!coherent && !(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
 	    dma_handle != DMA_MAPPING_ERROR)
 		arch_sync_dma_for_device(dev, phys, size, dir);
@@ -938,7 +938,8 @@  static dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys,
 		size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
 	return __iommu_dma_map(dev, phys, size,
-			dma_info_to_prot(dir, false, attrs) | IOMMU_MMIO);
+			dma_info_to_prot(dir, false, attrs) | IOMMU_MMIO,
+			dma_get_mask(dev));
 }
 
 static void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
@@ -1041,7 +1042,8 @@  static void *iommu_dma_alloc(struct device *dev, size_t size,
 	if (!cpu_addr)
 		return NULL;
 
-	*handle = __iommu_dma_map(dev, page_to_phys(page), size, ioprot);
+	*handle = __iommu_dma_map(dev, page_to_phys(page), size, ioprot,
+			dev->coherent_dma_mask);
 	if (*handle == DMA_MAPPING_ERROR) {
 		__iommu_dma_free(dev, size, cpu_addr);
 		return NULL;