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Diffstat (limited to 'crypto/async_tx/async_xor.c')
-rw-r--r--crypto/async_tx/async_xor.c123
1 files changed, 60 insertions, 63 deletions
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 3cc5dc763b5..691fa98a18c 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -34,18 +34,16 @@
static __async_inline struct dma_async_tx_descriptor *
do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
unsigned int offset, int src_cnt, size_t len,
- enum async_tx_flags flags,
- struct dma_async_tx_descriptor *depend_tx,
- dma_async_tx_callback cb_fn, void *cb_param)
+ struct async_submit_ctl *submit)
{
struct dma_device *dma = chan->device;
dma_addr_t *dma_src = (dma_addr_t *) src_list;
struct dma_async_tx_descriptor *tx = NULL;
int src_off = 0;
int i;
- dma_async_tx_callback _cb_fn;
- void *_cb_param;
- enum async_tx_flags async_flags;
+ dma_async_tx_callback cb_fn_orig = submit->cb_fn;
+ void *cb_param_orig = submit->cb_param;
+ enum async_tx_flags flags_orig = submit->flags;
enum dma_ctrl_flags dma_flags;
int xor_src_cnt;
dma_addr_t dma_dest;
@@ -63,7 +61,7 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
}
while (src_cnt) {
- async_flags = flags;
+ submit->flags = flags_orig;
dma_flags = 0;
xor_src_cnt = min(src_cnt, dma->max_xor);
/* if we are submitting additional xors, leave the chain open,
@@ -71,15 +69,15 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
* buffer mapped
*/
if (src_cnt > xor_src_cnt) {
- async_flags &= ~ASYNC_TX_ACK;
+ submit->flags &= ~ASYNC_TX_ACK;
dma_flags = DMA_COMPL_SKIP_DEST_UNMAP;
- _cb_fn = NULL;
- _cb_param = NULL;
+ submit->cb_fn = NULL;
+ submit->cb_param = NULL;
} else {
- _cb_fn = cb_fn;
- _cb_param = cb_param;
+ submit->cb_fn = cb_fn_orig;
+ submit->cb_param = cb_param_orig;
}
- if (_cb_fn)
+ if (submit->cb_fn)
dma_flags |= DMA_PREP_INTERRUPT;
/* Since we have clobbered the src_list we are committed
@@ -90,7 +88,7 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
xor_src_cnt, len, dma_flags);
if (unlikely(!tx))
- async_tx_quiesce(&depend_tx);
+ async_tx_quiesce(&submit->depend_tx);
/* spin wait for the preceeding transactions to complete */
while (unlikely(!tx)) {
@@ -101,10 +99,8 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
dma_flags);
}
- async_tx_submit(chan, tx, async_flags, depend_tx, _cb_fn,
- _cb_param);
-
- depend_tx = tx;
+ async_tx_submit(chan, tx, submit);
+ submit->depend_tx = tx;
if (src_cnt > xor_src_cnt) {
/* drop completed sources */
@@ -123,8 +119,7 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list,
static void
do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
- int src_cnt, size_t len, enum async_tx_flags flags,
- dma_async_tx_callback cb_fn, void *cb_param)
+ int src_cnt, size_t len, struct async_submit_ctl *submit)
{
int i;
int xor_src_cnt;
@@ -139,7 +134,7 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
/* set destination address */
dest_buf = page_address(dest) + offset;
- if (flags & ASYNC_TX_XOR_ZERO_DST)
+ if (submit->flags & ASYNC_TX_XOR_ZERO_DST)
memset(dest_buf, 0, len);
while (src_cnt > 0) {
@@ -152,33 +147,35 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
src_off += xor_src_cnt;
}
- async_tx_sync_epilog(cb_fn, cb_param);
+ async_tx_sync_epilog(submit);
}
/**
* async_xor - attempt to xor a set of blocks with a dma engine.
- * xor_blocks always uses the dest as a source so the ASYNC_TX_XOR_ZERO_DST
- * flag must be set to not include dest data in the calculation. The
- * assumption with dma eninges is that they only use the destination
- * buffer as a source when it is explicity specified in the source list.
* @dest: destination page
- * @src_list: array of source pages (if the dest is also a source it must be
- * at index zero). The contents of this array may be overwritten.
- * @offset: offset in pages to start transaction
+ * @src_list: array of source pages
+ * @offset: common src/dst offset to start transaction
* @src_cnt: number of source pages
* @len: length in bytes
- * @flags: ASYNC_TX_XOR_ZERO_DST, ASYNC_TX_XOR_DROP_DEST, ASYNC_TX_ACK
- * @depend_tx: xor depends on the result of this transaction.
- * @cb_fn: function to call when the xor completes
- * @cb_param: parameter to pass to the callback routine
+ * @submit: submission / completion modifiers
+ *
+ * honored flags: ASYNC_TX_ACK, ASYNC_TX_XOR_ZERO_DST, ASYNC_TX_XOR_DROP_DST
+ *
+ * xor_blocks always uses the dest as a source so the
+ * ASYNC_TX_XOR_ZERO_DST flag must be set to not include dest data in
+ * the calculation. The assumption with dma eninges is that they only
+ * use the destination buffer as a source when it is explicity specified
+ * in the source list.
+ *
+ * src_list note: if the dest is also a source it must be at index zero.
+ * The contents of this array will be overwritten if a scribble region
+ * is not specified.
*/
struct dma_async_tx_descriptor *
async_xor(struct page *dest, struct page **src_list, unsigned int offset,
- int src_cnt, size_t len, enum async_tx_flags flags,
- struct dma_async_tx_descriptor *depend_tx,
- dma_async_tx_callback cb_fn, void *cb_param)
+ int src_cnt, size_t len, struct async_submit_ctl *submit)
{
- struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_XOR,
+ struct dma_chan *chan = async_tx_find_channel(submit, DMA_XOR,
&dest, 1, src_list,
src_cnt, len);
BUG_ON(src_cnt <= 1);
@@ -188,7 +185,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
pr_debug("%s (async): len: %zu\n", __func__, len);
return do_async_xor(chan, dest, src_list, offset, src_cnt, len,
- flags, depend_tx, cb_fn, cb_param);
+ submit);
} else {
/* run the xor synchronously */
pr_debug("%s (sync): len: %zu\n", __func__, len);
@@ -196,16 +193,15 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
/* in the sync case the dest is an implied source
* (assumes the dest is the first source)
*/
- if (flags & ASYNC_TX_XOR_DROP_DST) {
+ if (submit->flags & ASYNC_TX_XOR_DROP_DST) {
src_cnt--;
src_list++;
}
/* wait for any prerequisite operations */
- async_tx_quiesce(&depend_tx);
+ async_tx_quiesce(&submit->depend_tx);
- do_sync_xor(dest, src_list, offset, src_cnt, len,
- flags, cb_fn, cb_param);
+ do_sync_xor(dest, src_list, offset, src_cnt, len, submit);
return NULL;
}
@@ -222,25 +218,25 @@ static int page_is_zero(struct page *p, unsigned int offset, size_t len)
/**
* async_xor_val - attempt a xor parity check with a dma engine.
* @dest: destination page used if the xor is performed synchronously
- * @src_list: array of source pages. The dest page must be listed as a source
- * at index zero. The contents of this array may be overwritten.
+ * @src_list: array of source pages
* @offset: offset in pages to start transaction
* @src_cnt: number of source pages
* @len: length in bytes
* @result: 0 if sum == 0 else non-zero
- * @flags: ASYNC_TX_ACK
- * @depend_tx: xor depends on the result of this transaction.
- * @cb_fn: function to call when the xor completes
- * @cb_param: parameter to pass to the callback routine
+ * @submit: submission / completion modifiers
+ *
+ * honored flags: ASYNC_TX_ACK
+ *
+ * src_list note: if the dest is also a source it must be at index zero.
+ * The contents of this array will be overwritten if a scribble region
+ * is not specified.
*/
struct dma_async_tx_descriptor *
-async_xor_val(struct page *dest, struct page **src_list,
- unsigned int offset, int src_cnt, size_t len,
- u32 *result, enum async_tx_flags flags,
- struct dma_async_tx_descriptor *depend_tx,
- dma_async_tx_callback cb_fn, void *cb_param)
+async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
+ int src_cnt, size_t len, u32 *result,
+ struct async_submit_ctl *submit)
{
- struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_XOR_VAL,
+ struct dma_chan *chan = async_tx_find_channel(submit, DMA_XOR_VAL,
&dest, 1, src_list,
src_cnt, len);
struct dma_device *device = chan ? chan->device : NULL;
@@ -250,11 +246,12 @@ async_xor_val(struct page *dest, struct page **src_list,
if (device && src_cnt <= device->max_xor) {
dma_addr_t *dma_src = (dma_addr_t *) src_list;
- unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
+ unsigned long dma_prep_flags;
int i;
pr_debug("%s: (async) len: %zu\n", __func__, len);
+ dma_prep_flags = submit->cb_fn ? DMA_PREP_INTERRUPT : 0;
for (i = 0; i < src_cnt; i++)
dma_src[i] = dma_map_page(device->dev, src_list[i],
offset, len, DMA_TO_DEVICE);
@@ -263,7 +260,7 @@ async_xor_val(struct page *dest, struct page **src_list,
len, result,
dma_prep_flags);
if (unlikely(!tx)) {
- async_tx_quiesce(&depend_tx);
+ async_tx_quiesce(&submit->depend_tx);
while (!tx) {
dma_async_issue_pending(chan);
@@ -273,23 +270,23 @@ async_xor_val(struct page *dest, struct page **src_list,
}
}
- async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
+ async_tx_submit(chan, tx, submit);
} else {
- unsigned long xor_flags = flags;
+ enum async_tx_flags flags_orig = submit->flags;
pr_debug("%s: (sync) len: %zu\n", __func__, len);
- xor_flags |= ASYNC_TX_XOR_DROP_DST;
- xor_flags &= ~ASYNC_TX_ACK;
+ submit->flags |= ASYNC_TX_XOR_DROP_DST;
+ submit->flags &= ~ASYNC_TX_ACK;
- tx = async_xor(dest, src_list, offset, src_cnt, len, xor_flags,
- depend_tx, NULL, NULL);
+ tx = async_xor(dest, src_list, offset, src_cnt, len, submit);
async_tx_quiesce(&tx);
*result = page_is_zero(dest, offset, len) ? 0 : 1;
- async_tx_sync_epilog(cb_fn, cb_param);
+ async_tx_sync_epilog(submit);
+ submit->flags = flags_orig;
}
return tx;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-25 10:26:45 +0000