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dmaengine, async_tx: support alignment checks

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Some engines have transfer size and address alignment restrictions.  Add
a per-operation alignment property to struct dma_device that the async
routines and dmatest can use to check alignment capabilities.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2009-09-08 17:42:53 -07:00
parent 9308add6ea
commit 83544ae9f3
6 changed files with 67 additions and 6 deletions
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5
crypto/async_tx/async_xor.c
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@@ -193,7 +193,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
else if (sizeof(dma_addr_t) <= sizeof(struct page *))
dma_src = (dma_addr_t *) src_list;
if (dma_src && chan) {
if (dma_src && chan && is_dma_xor_aligned(chan->device, offset, 0, len)) {
/* run the xor asynchronously */
pr_debug("%s (async): len: %zu\n", __func__, len);
@@ -265,7 +265,8 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
else if (sizeof(dma_addr_t) <= sizeof(struct page *))
dma_src = (dma_addr_t *) src_list;
if (dma_src && device && src_cnt <= device->max_xor) {
if (dma_src && device && src_cnt <= device->max_xor &&
is_dma_xor_aligned(device, offset, 0, len)) {
unsigned long dma_prep_flags = 0;
int i;