summaryrefslogtreecommitdiff
path: root/arch/mips/mm
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-19 01:24:36 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-19 01:24:36 +0400
commit857b50f5d0eed113428c864e927289d8f5f2b864 (patch)
tree6864b17f92b855d35f896b84948b8d19b0105ce4 /arch/mips/mm
parent168f07a1ea75870b3fdee3d69d978813eb1fd58d (diff)
parent31d6f57d3c65fd75c18ea9a3acebedc6cd60d656 (diff)
downloadlinux-857b50f5d0eed113428c864e927289d8f5f2b864.tar.xz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle: "This is the MIPS pull request for the next kernel: - Zubair's patch series adds CMA support for MIPS. Doing so it also touches ARM64 and x86. - remove the last instance of IRQF_DISABLED from arch/mips - updates to two of the MIPS defconfig files. - cleanup of how cache coherency bits are handled on MIPS and implement support for write-combining. - platform upgrades for Alchemy - move MIPS DTS files to arch/mips/boot/dts/" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (24 commits) MIPS: ralink: remove deprecated IRQF_DISABLED MIPS: pgtable.h: Implement the pgprot_writecombine function for MIPS MIPS: cpu-probe: Set the write-combine CCA value on per core basis MIPS: pgtable-bits: Define the CCA bit for WC writes on Ingenic cores MIPS: pgtable-bits: Move the CCA bits out of the core's ifdef blocks MIPS: DMA: Add cma support x86: use generic dma-contiguous.h arm64: use generic dma-contiguous.h asm-generic: Add dma-contiguous.h MIPS: BPF: Add new emit_long_instr macro MIPS: ralink: Move device-trees to arch/mips/boot/dts/ MIPS: Netlogic: Move device-trees to arch/mips/boot/dts/ MIPS: sead3: Move device-trees to arch/mips/boot/dts/ MIPS: Lantiq: Move device-trees to arch/mips/boot/dts/ MIPS: Octeon: Move device-trees to arch/mips/boot/dts/ MIPS: Add support for building device-tree binaries MIPS: Create common infrastructure for building built-in device-trees MIPS: SEAD3: Enable DEVTMPFS MIPS: SEAD3: Regenerate defconfigs MIPS: Alchemy: DB1300: Add touch penirq support ...
Diffstat (limited to 'arch/mips/mm')
-rw-r--r--arch/mips/mm/dma-default.c37
1 files changed, 25 insertions, 12 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 44b6dff5aba2..33ba3c558fe4 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -16,6 +16,7 @@
#include <linux/string.h>
#include <linux/gfp.h>
#include <linux/highmem.h>
+#include <linux/dma-contiguous.h>
#include <asm/cache.h>
#include <asm/cpu-type.h>
@@ -128,23 +129,30 @@ static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{
void *ret;
+ struct page *page = NULL;
+ unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
return ret;
gfp = massage_gfp_flags(dev, gfp);
- ret = (void *) __get_free_pages(gfp, get_order(size));
-
- if (ret) {
- memset(ret, 0, size);
- *dma_handle = plat_map_dma_mem(dev, ret, size);
-
- if (!plat_device_is_coherent(dev)) {
- dma_cache_wback_inv((unsigned long) ret, size);
- if (!hw_coherentio)
- ret = UNCAC_ADDR(ret);
- }
+ if (IS_ENABLED(CONFIG_DMA_CMA) && !(gfp & GFP_ATOMIC))
+ page = dma_alloc_from_contiguous(dev,
+ count, get_order(size));
+ if (!page)
+ page = alloc_pages(gfp, get_order(size));
+
+ if (!page)
+ return NULL;
+
+ ret = page_address(page);
+ memset(ret, 0, size);
+ *dma_handle = plat_map_dma_mem(dev, ret, size);
+ if (!plat_device_is_coherent(dev)) {
+ dma_cache_wback_inv((unsigned long) ret, size);
+ if (!hw_coherentio)
+ ret = UNCAC_ADDR(ret);
}
return ret;
@@ -164,6 +172,8 @@ static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
{
unsigned long addr = (unsigned long) vaddr;
int order = get_order(size);
+ unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
+ struct page *page = NULL;
if (dma_release_from_coherent(dev, order, vaddr))
return;
@@ -173,7 +183,10 @@ static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
if (!plat_device_is_coherent(dev) && !hw_coherentio)
addr = CAC_ADDR(addr);
- free_pages(addr, get_order(size));
+ page = virt_to_page((void *) addr);
+
+ if (!dma_release_from_contiguous(dev, page, count))
+ __free_pages(page, get_order(size));
}
static inline void __dma_sync_virtual(void *addr, size_t size,