The patch titled
Subject: dma: add calls for dma_map_page_attrs and dma_unmap_page_attrs
has been removed from the -mm tree. Its filename was
dma-add-calls-for-dma_map_page_attrs-and-dma_unmap_page_attrs.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Subject: dma: add calls for dma_map_page_attrs and dma_unmap_page_attrs
Add support for mapping and unmapping a page with attributes. The primary
use for this is currently to allow for us to pass the
DMA_ATTR_SKIP_CPU_SYNC attribute when mapping and unmapping a page. On
some architectures such as ARM the synchronization has significant
overhead and if we are already taking care of the sync_for_cpu and
sync_for_device from the driver there isn't much need to handle this in
the map/unmap calls as well.
Link: http://lkml.kernel.org/r/20161110113601.76501.46095.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/dma-mapping.h | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff -puN include/linux/dma-mapping.h~dma-add-calls-for-dma_map_page_attrs-and-dma_unmap_page_attrs include/linux/dma-mapping.h
--- a/include/linux/dma-mapping.h~dma-add-calls-for-dma_map_page_attrs-and-dma_unmap_page_attrs
+++ a/include/linux/dma-mapping.h
@@ -243,29 +243,33 @@ static inline void dma_unmap_sg_attrs(st
ops->unmap_sg(dev, sg, nents, dir, attrs);
}
-static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
- size_t offset, size_t size,
- enum dma_data_direction dir)
+static inline dma_addr_t dma_map_page_attrs(struct device *dev,
+ struct page *page,
+ size_t offset, size_t size,
+ enum dma_data_direction dir,
+ unsigned long attrs)
{
struct dma_map_ops *ops = get_dma_ops(dev);
dma_addr_t addr;
kmemcheck_mark_initialized(page_address(page) + offset, size);
BUG_ON(!valid_dma_direction(dir));
- addr = ops->map_page(dev, page, offset, size, dir, 0);
+ addr = ops->map_page(dev, page, offset, size, dir, attrs);
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
return addr;
}
-static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
- size_t size, enum dma_data_direction dir)
+static inline void dma_unmap_page_attrs(struct device *dev,
+ dma_addr_t addr, size_t size,
+ enum dma_data_direction dir,
+ unsigned long attrs)
{
struct dma_map_ops *ops = get_dma_ops(dev);
BUG_ON(!valid_dma_direction(dir));
if (ops->unmap_page)
- ops->unmap_page(dev, addr, size, dir, 0);
+ ops->unmap_page(dev, addr, size, dir, attrs);
debug_dma_unmap_page(dev, addr, size, dir, false);
}
@@ -385,6 +389,8 @@ dma_sync_sg_for_device(struct device *de
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)
+#define dma_map_page(d, p, o, s, r) dma_map_page_attrs(d, p, o, s, r, 0)
+#define dma_unmap_page(d, a, s, r) dma_unmap_page_attrs(d, a, s, r, 0)
extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
_
Patches currently in -mm which might be from alexander.h.duyck@xxxxxxxxx are
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