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| author | Ira Snyder <iws@ovro.caltech.edu> | 2010-09-30 11:46:47 +0000 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-10-07 14:41:41 -0700 |
| commit | 0d688662aab9d80078be82aa5aea561346643298 (patch) | |
| tree | 61ce15bc08f757db7d94a37ab2100973c7e0e06c /drivers/dma/ste_dma40.c | |
| parent | 968f19ae802fdc6b6b6b5af6fe79cf23d281be0f (diff) | |
| download | kernel_samsung_smdk4412-0d688662aab9d80078be82aa5aea561346643298.zip kernel_samsung_smdk4412-0d688662aab9d80078be82aa5aea561346643298.tar.gz kernel_samsung_smdk4412-0d688662aab9d80078be82aa5aea561346643298.tar.bz2 | |
ste_dma40: implement support for scatterlist to scatterlist copy
Now that the DMAEngine API has support for scatterlist to scatterlist
copy, implement support for the STE DMA40 DMA controller.
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
Acked-by: Per Fridén <per.friden@stericsson.com>
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 17e2600..d5fd098 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1857,6 +1857,18 @@ err: return NULL; } +static struct dma_async_tx_descriptor * +d40_prep_sg(struct dma_chan *chan, + struct scatterlist *dst_sg, unsigned int dst_nents, + struct scatterlist *src_sg, unsigned int src_nents, + unsigned long dma_flags) +{ + if (dst_nents != src_nents) + return NULL; + + return stedma40_memcpy_sg(chan, dst_sg, src_sg, dst_nents, dma_flags); +} + static int d40_prep_slave_sg_log(struct d40_desc *d40d, struct d40_chan *d40c, struct scatterlist *sgl, @@ -2281,6 +2293,7 @@ static int __init d40_dmaengine_init(struct d40_base *base, base->dma_slave.device_alloc_chan_resources = d40_alloc_chan_resources; base->dma_slave.device_free_chan_resources = d40_free_chan_resources; base->dma_slave.device_prep_dma_memcpy = d40_prep_memcpy; + base->dma_slave.device_prep_dma_sg = d40_prep_sg; base->dma_slave.device_prep_slave_sg = d40_prep_slave_sg; base->dma_slave.device_tx_status = d40_tx_status; base->dma_slave.device_issue_pending = d40_issue_pending; @@ -2301,10 +2314,12 @@ static int __init d40_dmaengine_init(struct d40_base *base, dma_cap_zero(base->dma_memcpy.cap_mask); dma_cap_set(DMA_MEMCPY, base->dma_memcpy.cap_mask); + dma_cap_set(DMA_SG, base->dma_slave.cap_mask); base->dma_memcpy.device_alloc_chan_resources = d40_alloc_chan_resources; base->dma_memcpy.device_free_chan_resources = d40_free_chan_resources; base->dma_memcpy.device_prep_dma_memcpy = d40_prep_memcpy; + base->dma_slave.device_prep_dma_sg = d40_prep_sg; base->dma_memcpy.device_prep_slave_sg = d40_prep_slave_sg; base->dma_memcpy.device_tx_status = d40_tx_status; base->dma_memcpy.device_issue_pending = d40_issue_pending; @@ -2331,10 +2346,12 @@ static int __init d40_dmaengine_init(struct d40_base *base, dma_cap_zero(base->dma_both.cap_mask); dma_cap_set(DMA_SLAVE, base->dma_both.cap_mask); dma_cap_set(DMA_MEMCPY, base->dma_both.cap_mask); + dma_cap_set(DMA_SG, base->dma_slave.cap_mask); base->dma_both.device_alloc_chan_resources = d40_alloc_chan_resources; base->dma_both.device_free_chan_resources = d40_free_chan_resources; base->dma_both.device_prep_dma_memcpy = d40_prep_memcpy; + base->dma_slave.device_prep_dma_sg = d40_prep_sg; base->dma_both.device_prep_slave_sg = d40_prep_slave_sg; base->dma_both.device_tx_status = d40_tx_status; base->dma_both.device_issue_pending = d40_issue_pending; |