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authorIra Snyder <iws@ovro.caltech.edu>2010-09-30 11:46:47 +0000
committerDan Williams <dan.j.williams@intel.com>2010-10-07 14:41:41 -0700
commit0d688662aab9d80078be82aa5aea561346643298 (patch)
tree61ce15bc08f757db7d94a37ab2100973c7e0e06c
parent968f19ae802fdc6b6b6b5af6fe79cf23d281be0f (diff)
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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>
-rw-r--r--drivers/dma/ste_dma40.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 17e2600a00c..d5fd098e22e 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;