Displaying 8 results from an estimated 8 matches for "dma_common_alloc_pages".
2020 Sep 15
0
[PATCH 15/18] dma-mapping: add a new dma_alloc_pages API
...de4f4e191e7..447e0fd0ed3895 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -952,5 +952,7 @@ const struct dma_map_ops alpha_pci_ops = {
.dma_supported = alpha_pci_supported,
.mmap = dma_common_mmap,
.get_sgtable = dma_common_get_sgtable,
+ .alloc_pages = dma_common_alloc_pages,
+ .free_pages = dma_common_free_pages,
};
EXPORT_SYMBOL(alpha_pci_ops);
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index 287ef898a55e11..43c6d66b6e733a 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -176,6 +176,8 @@ stat...
2020 Aug 19
0
[PATCH 19/28] dma-mapping: replace DMA_ATTR_NON_CONSISTENT with dma_{alloc, free}_pages
...37907268d5c..291121e3b5a583 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -957,5 +957,7 @@ const struct dma_map_ops alpha_pci_ops = {
.dma_supported = alpha_pci_supported,
.mmap = dma_common_mmap,
.get_sgtable = dma_common_get_sgtable,
+ .alloc_pages = dma_common_alloc_pages,
+ .free_pages = dma_common_free_pages,
};
EXPORT_SYMBOL(alpha_pci_ops);
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index 287ef898a55e11..43c6d66b6e733a 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -176,6 +176,8 @@ stat...
2020 Sep 25
2
[PATCH 17/18] dma-iommu: implement ->alloc_noncoherent
...addr;
> }
>
> +#ifdef CONFIG_DMA_REMAP
> +static void *iommu_dma_alloc_noncoherent(struct device *dev, size_t size,
> + dma_addr_t *handle, enum dma_data_direction dir, gfp_t gfp)
> +{
> + if (!gfpflags_allow_blocking(gfp)) {
> + struct page *page;
> +
> + page = dma_common_alloc_pages(dev, size, handle, dir, gfp);
> + if (!page)
> + return NULL;
> + return page_address(page);
> + }
> +
> + return iommu_dma_alloc_remap(dev, size, handle, gfp | __GFP_ZERO,
> + PAGE_KERNEL, 0);
iommu_dma_alloc_remap() makes use of the DMA_ATTR_ALLOC_SINGLE_PAGES at...
2020 Sep 15
0
[PATCH 17/18] dma-iommu: implement ->alloc_noncoherent
...loc(struct device *dev, size_t size,
return cpu_addr;
}
+#ifdef CONFIG_DMA_REMAP
+static void *iommu_dma_alloc_noncoherent(struct device *dev, size_t size,
+ dma_addr_t *handle, enum dma_data_direction dir, gfp_t gfp)
+{
+ if (!gfpflags_allow_blocking(gfp)) {
+ struct page *page;
+
+ page = dma_common_alloc_pages(dev, size, handle, dir, gfp);
+ if (!page)
+ return NULL;
+ return page_address(page);
+ }
+
+ return iommu_dma_alloc_remap(dev, size, handle, gfp | __GFP_ZERO,
+ PAGE_KERNEL, 0);
+}
+
+static void iommu_dma_free_noncoherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t...
2020 Sep 14
20
a saner API for allocating DMA addressable pages v2
Hi all,
this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs
with a separate new dma_alloc_pages API, which is available on all
platforms. In addition to cleaning up the convoluted code path, this
ensures that other drivers that have asked for better support for
non-coherent DMA to pages with incurring bounce buffering over can finally
be properly supported.
I'm still a
2020 Sep 15
32
a saner API for allocating DMA addressable pages v3
Hi all,
this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs
with a separate new dma_alloc_pages API, which is available on all
platforms. In addition to cleaning up the convoluted code path, this
ensures that other drivers that have asked for better support for
non-coherent DMA to pages with incurring bounce buffering over can finally
be properly supported.
As a follow up I
2020 Sep 26
0
[PATCH 17/18] dma-iommu: implement ->alloc_noncoherent
...asz Figa wrote:
> > +static void *iommu_dma_alloc_noncoherent(struct device *dev, size_t size,
> > + dma_addr_t *handle, enum dma_data_direction dir, gfp_t gfp)
> > +{
> > + if (!gfpflags_allow_blocking(gfp)) {
> > + struct page *page;
> > +
> > + page = dma_common_alloc_pages(dev, size, handle, dir, gfp);
> > + if (!page)
> > + return NULL;
> > + return page_address(page);
> > + }
> > +
> > + return iommu_dma_alloc_remap(dev, size, handle, gfp | __GFP_ZERO,
> > + PAGE_KERNEL, 0);
>
> iommu_dma_alloc_remap() ma...
2020 Aug 19
39
a saner API for allocating DMA addressable pages
Hi all,
this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs
with a separate new dma_alloc_pages API, which is available on all
platforms. In addition to cleaning up the convoluted code path, this
ensures that other drivers that have asked for better support for
non-coherent DMA to pages with incurring bounce buffering over can finally
be properly supported.
I'm still a