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authorDan Williams <dan.j.williams@intel.com>2013-10-18 19:35:30 +0200
committerDan Williams <dan.j.williams@intel.com>2013-11-14 11:01:31 -0800
commit1786b943dad0b2f655e69b3ad5187f7e39ef32e6 (patch)
tree07b9c593db0e81278fc8f5684155712fcade712b /crypto
parent7476bd79fc019dd9a8361de6696627a4eae3ef05 (diff)
downloadlinux-linaro-stable-1786b943dad0b2f655e69b3ad5187f7e39ef32e6.tar.gz
async_pq_val: convert to dmaengine_unmap_data
Use the generic unmap object to unmap dma buffers. Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/async_tx/async_pq.c58
1 files changed, 35 insertions, 23 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c
index 8cdbf33bd046..4126b56fbc01 100644
--- a/crypto/async_tx/async_pq.c
+++ b/crypto/async_tx/async_pq.c
@@ -290,50 +290,60 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
struct dma_async_tx_descriptor *tx;
unsigned char coefs[disks-2];
enum dma_ctrl_flags dma_flags = submit->cb_fn ? DMA_PREP_INTERRUPT : 0;
- dma_addr_t *dma_src = NULL;
- int src_cnt = 0;
+ struct dmaengine_unmap_data *unmap = NULL;
BUG_ON(disks < 4);
- if (submit->scribble)
- dma_src = submit->scribble;
- else if (sizeof(dma_addr_t) <= sizeof(struct page *))
- dma_src = (dma_addr_t *) blocks;
+ if (device)
+ unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO);
- if (dma_src && device && disks <= dma_maxpq(device, 0) &&
+ if (unmap && 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;
+ dma_addr_t pq[2];
+ int i, j = 0, src_cnt = 0;
pr_debug("%s: (async) disks: %d len: %zu\n",
__func__, disks, len);
- if (!P(blocks, disks))
+
+ unmap->len = len;
+ for (i = 0; i < disks-2; i++)
+ if (likely(blocks[i])) {
+ unmap->addr[j] = dma_map_page(dev, blocks[i],
+ offset, len,
+ DMA_TO_DEVICE);
+ coefs[j] = raid6_gfexp[i];
+ unmap->to_cnt++;
+ src_cnt++;
+ j++;
+ }
+
+ if (!P(blocks, disks)) {
+ pq[0] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_P;
- else
+ } else {
pq[0] = dma_map_page(dev, P(blocks, disks),
offset, len,
DMA_TO_DEVICE);
- if (!Q(blocks, disks))
+ unmap->addr[j++] = pq[0];
+ unmap->to_cnt++;
+ }
+ if (!Q(blocks, disks)) {
+ pq[1] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_Q;
- else
+ } else {
pq[1] = dma_map_page(dev, Q(blocks, disks),
offset, len,
DMA_TO_DEVICE);
+ unmap->addr[j++] = pq[1];
+ unmap->to_cnt++;
+ }
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
- for (i = 0; i < disks-2; i++)
- if (likely(blocks[i])) {
- dma_src[src_cnt] = dma_map_page(dev, blocks[i],
- offset, len,
- DMA_TO_DEVICE);
- coefs[src_cnt] = raid6_gfexp[i];
- src_cnt++;
- }
-
for (;;) {
- tx = device->device_prep_dma_pq_val(chan, pq, dma_src,
+ tx = device->device_prep_dma_pq_val(chan, pq,
+ unmap->addr,
src_cnt,
coefs,
len, pqres,
@@ -343,6 +353,8 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
async_tx_quiesce(&submit->depend_tx);
dma_async_issue_pending(chan);
}
+
+ dma_set_unmap(tx, unmap);
async_tx_submit(chan, tx, submit);
return tx;