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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 <[email protected]>
This commit is contained in:
Dan Williams 2009-09-08 17:42:53 -07:00
commit 83544ae9f3
6 changed files with 67 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

2
crypto/async_tx/async_memcpy.c
View file

@ -50,7 +50,7 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
struct dma_device *device = chan ? chan->device : NULL;
struct dma_async_tx_descriptor *tx = NULL;
if (device) {
if (device && is_dma_copy_aligned(device, src_offset, dest_offset, len)) {
dma_addr_t dma_dest, dma_src;
unsigned long dma_prep_flags = 0;

2
crypto/async_tx/async_memset.c
View file

@ -47,7 +47,7 @@ async_memset(struct page *dest, int val, unsigned int offset, size_t len,
struct dma_device *device = chan ? chan->device : NULL;
struct dma_async_tx_descriptor *tx = NULL;
if (device) {
if (device && is_dma_fill_aligned(device, offset, 0, len)) {
dma_addr_t dma_dest;
unsigned long dma_prep_flags = 0;

6
crypto/async_tx/async_pq.c
View file

@ -211,7 +211,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
if (dma_src && device &&
(src_cnt <= dma_maxpq(device, 0) ||
dma_maxpq(device, DMA_PREP_CONTINUE) > 0)) {
dma_maxpq(device, DMA_PREP_CONTINUE) > 0) &&
is_dma_pq_aligned(device, offset, 0, len)) {
/* run the p+q asynchronously */
pr_debug("%s: (async) disks: %d len: %zu\n",
__func__, disks, len);
@ -274,7 +275,8 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
else if (sizeof(dma_addr_t) <= sizeof(struct page *))
dma_src = (dma_addr_t *) blocks;
if (dma_src && device && disks <= dma_maxpq(device, 0)) {
if (dma_src && device && disks <= dma_maxpq(device, 0) &&
is_dma_pq_aligned(device, offset, 0, len)) {
struct device *dev = device->dev;
dma_addr_t *pq = &dma_src[disks-2];
int i;

5
crypto/async_tx/async_xor.c
View file

@ -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;