diff options
author | Dan Williams <dan.j.williams@intel.com> | 2013-10-18 19:35:28 +0200 |
---|---|---|
committer | Dan Williams <dan.j.williams@intel.com> | 2013-11-14 11:01:31 -0800 |
commit | 3bbdd49872931b8c4282aeb1cab5af7cce2cfb0d (patch) | |
tree | 0f38667f3e871c57c963a15c442620b5d2075b04 /crypto/async_tx/async_raid6_recov.c | |
parent | 173e86b2809234cb5f2a50e9a8c159b70e23da1c (diff) |
async_raid6_recov: 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>
[bzolnier: keep temporary dma_dest array in async_mult()]
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/async_tx/async_raid6_recov.c')
-rw-r--r-- | crypto/async_tx/async_raid6_recov.c | 69 |
1 files changed, 49 insertions, 20 deletions
diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c index a9f08a6a582e..a3a72a784421 100644 --- a/crypto/async_tx/async_raid6_recov.c +++ b/crypto/async_tx/async_raid6_recov.c @@ -26,6 +26,7 @@ #include <linux/dma-mapping.h> #include <linux/raid/pq.h> #include <linux/async_tx.h> +#include <linux/dmaengine.h> static struct dma_async_tx_descriptor * async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef, @@ -34,35 +35,47 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef, struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ, &dest, 1, srcs, 2, len); struct dma_device *dma = chan ? chan->device : NULL; + struct dmaengine_unmap_data *unmap = NULL; const u8 *amul, *bmul; u8 ax, bx; u8 *a, *b, *c; - if (dma) { - dma_addr_t dma_dest[2]; - dma_addr_t dma_src[2]; + if (dma) + unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOIO); + + if (unmap) { struct device *dev = dma->dev; + dma_addr_t pq[2]; struct dma_async_tx_descriptor *tx; - enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P; + enum dma_ctrl_flags dma_flags = DMA_COMPL_SKIP_SRC_UNMAP | + DMA_COMPL_SKIP_DEST_UNMAP | + DMA_PREP_PQ_DISABLE_P; if (submit->flags & ASYNC_TX_FENCE) dma_flags |= DMA_PREP_FENCE; - dma_dest[1] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL); - dma_src[0] = dma_map_page(dev, srcs[0], 0, len, DMA_TO_DEVICE); - dma_src[1] = dma_map_page(dev, srcs[1], 0, len, DMA_TO_DEVICE); - tx = dma->device_prep_dma_pq(chan, dma_dest, dma_src, 2, coef, + unmap->addr[0] = dma_map_page(dev, srcs[0], 0, len, DMA_TO_DEVICE); + unmap->addr[1] = dma_map_page(dev, srcs[1], 0, len, DMA_TO_DEVICE); + unmap->to_cnt = 2; + + unmap->addr[2] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL); + unmap->bidi_cnt = 1; + /* engine only looks at Q, but expects it to follow P */ + pq[1] = unmap->addr[2]; + + unmap->len = len; + tx = dma->device_prep_dma_pq(chan, pq, unmap->addr, 2, coef, len, dma_flags); if (tx) { + dma_set_unmap(tx, unmap); async_tx_submit(chan, tx, submit); + dmaengine_unmap_put(unmap); return tx; } /* could not get a descriptor, unmap and fall through to * the synchronous path */ - dma_unmap_page(dev, dma_dest[1], len, DMA_BIDIRECTIONAL); - dma_unmap_page(dev, dma_src[0], len, DMA_TO_DEVICE); - dma_unmap_page(dev, dma_src[1], len, DMA_TO_DEVICE); + dmaengine_unmap_put(unmap); } /* run the operation synchronously */ @@ -89,23 +102,40 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len, struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ, &dest, 1, &src, 1, len); struct dma_device *dma = chan ? chan->device : NULL; + struct dmaengine_unmap_data *unmap = NULL; const u8 *qmul; /* Q multiplier table */ u8 *d, *s; - if (dma) { + if (dma) + unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOIO); + + if (unmap) { dma_addr_t dma_dest[2]; - dma_addr_t dma_src[1]; struct device *dev = dma->dev; struct dma_async_tx_descriptor *tx; - enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P; + enum dma_ctrl_flags dma_flags = DMA_COMPL_SKIP_SRC_UNMAP | + DMA_COMPL_SKIP_DEST_UNMAP | + DMA_PREP_PQ_DISABLE_P; if (submit->flags & ASYNC_TX_FENCE) dma_flags |= DMA_PREP_FENCE; - dma_dest[1] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL); - dma_src[0] = dma_map_page(dev, src, 0, len, DMA_TO_DEVICE); - tx = dma->device_prep_dma_pq(chan, dma_dest, dma_src, 1, &coef, - len, dma_flags); + unmap->addr[0] = dma_map_page(dev, src, 0, len, DMA_TO_DEVICE); + unmap->to_cnt++; + unmap->addr[1] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL); + dma_dest[1] = unmap->addr[1]; + unmap->bidi_cnt++; + unmap->len = len; + + /* this looks funny, but the engine looks for Q at + * dma_dest[1] and ignores dma_dest[0] as a dest + * due to DMA_PREP_PQ_DISABLE_P + */ + tx = dma->device_prep_dma_pq(chan, dma_dest, unmap->addr, + 1, &coef, len, dma_flags); + if (tx) { + dma_set_unmap(tx, unmap); + dmaengine_unmap_put(unmap); async_tx_submit(chan, tx, submit); return tx; } @@ -113,8 +143,7 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len, /* could not get a descriptor, unmap and fall through to * the synchronous path */ - dma_unmap_page(dev, dma_dest[1], len, DMA_BIDIRECTIONAL); - dma_unmap_page(dev, dma_src[0], len, DMA_TO_DEVICE); + dmaengine_unmap_put(unmap); } /* no channel available, or failed to allocate a descriptor, so |