diff options
| author | Nicolin Chen <b42378@freescale.com> | 2013-11-05 16:56:48 +1100 |
|---|---|---|
| committer | Nicolin Chen <b42378@freescale.com> | 2013-11-05 18:54:27 +0800 |
| commit | 8f9ac7996b7322841de7526964e4dba995b96a01 (patch) | |
| tree | 07139d98a2280702f1208a1ad4fd8ca1126f9a8b /include | |
| parent | d5cda7837f71d4479b83c43ea3eda8a30d9b351c (diff) | |
lib/genalloc: add a helper function for DMA buffer allocation
When using pool space for DMA buffer, there might be duplicated calling of
gen_pool_alloc() and gen_pool_virt_to_phys() in each implementation.
Thus it's better to add a simple helper function, a compatible one to the
common dma_alloc_coherent(), to save some code.
Signed-off-by: Nicolin Chen <b42378@freescale.com>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/genalloc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h index 661d374aeb2d..ee52ae07beaf 100644 --- a/include/linux/genalloc.h +++ b/include/linux/genalloc.h @@ -94,6 +94,8 @@ static inline int gen_pool_add(struct gen_pool *pool, unsigned long addr, } extern void gen_pool_destroy(struct gen_pool *); extern unsigned long gen_pool_alloc(struct gen_pool *, size_t); +extern void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, + dma_addr_t *dma); extern void gen_pool_free(struct gen_pool *, unsigned long, size_t); extern void gen_pool_for_each_chunk(struct gen_pool *, void (*)(struct gen_pool *, struct gen_pool_chunk *, void *), void *); |