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async_tx: export async_tx_quiesce 

Replace open coded "wait and acknowledge" instances with async_tx_quiesce.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2008-07-17 17:59:55 -07:00
parent 669ab0b210
commit d2c52b7983
5 changed files with 26 additions and 62 deletions
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10
crypto/async_tx/async_memcpy.c
View File

@ -73,15 +73,7 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
pr_debug("%s: (sync) len: %zu\n", __func__, len);
/* wait for any prerequisite operations */
if (depend_tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(depend_tx));
if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
panic("%s: DMA_ERROR waiting for depend_tx\n",
__func__);
}
async_tx_quiesce(&depend_tx);
dest_buf = kmap_atomic(dest, KM_USER0) + dest_offset;
src_buf = kmap_atomic(src, KM_USER1) + src_offset;

10
crypto/async_tx/async_memset.c
View File

@ -72,15 +72,7 @@ async_memset(struct page *dest, int val, unsigned int offset,
dest_buf = (void *) (((char *) page_address(dest)) + offset);
/* wait for any prerequisite operations */
if (depend_tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(depend_tx));
if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
panic("%s: DMA_ERROR waiting for depend_tx\n",
__func__);
}
async_tx_quiesce(&depend_tx);
memset(dest_buf, val, len);

29
crypto/async_tx/async_tx.c
View File

@ -607,15 +607,7 @@ async_trigger_callback(enum async_tx_flags flags,
pr_debug("%s: (sync)\n", __func__);
/* wait for any prerequisite operations */
if (depend_tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(depend_tx));
if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
panic("%s: DMA_ERROR waiting for depend_tx\n",
__func__);
}
async_tx_quiesce(&depend_tx);
async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
}
@ -624,6 +616,25 @@ async_trigger_callback(enum async_tx_flags flags,
}
EXPORT_SYMBOL_GPL(async_trigger_callback);
/**
* async_tx_quiesce - ensure tx is complete and freeable upon return
* @tx - transaction to quiesce
*/
void async_tx_quiesce(struct dma_async_tx_descriptor **tx)
{
if (*tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(*tx));
if (dma_wait_for_async_tx(*tx) == DMA_ERROR)
panic("DMA_ERROR waiting for transaction\n");
async_tx_ack(*tx);
*tx = NULL;
}
}
EXPORT_SYMBOL_GPL(async_tx_quiesce);
module_init(async_tx_init);
module_exit(async_tx_exit);

37
crypto/async_tx/async_xor.c
View File

@ -30,24 +30,6 @@
#include <linux/raid/xor.h>
#include <linux/async_tx.h>
/**
* async_tx_quiesce - ensure tx is complete and freeable upon return
* @tx - transaction to quiesce
*/
static void async_tx_quiesce(struct dma_async_tx_descriptor **tx)
{
if (*tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(*tx));
if (dma_wait_for_async_tx(*tx) == DMA_ERROR)
panic("DMA_ERROR waiting for transaction\n");
async_tx_ack(*tx);
*tx = NULL;
}
}
/* do_async_xor - dma map the pages and perform the xor with an engine.
* This routine is marked __always_inline so it can be compiled away
* when CONFIG_DMA_ENGINE=n
@ -219,15 +201,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
}
/* wait for any prerequisite operations */
if (depend_tx) {
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
BUG_ON(async_tx_test_ack(depend_tx));
if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
panic("%s: DMA_ERROR waiting for depend_tx\n",
__func__);
}
async_tx_quiesce(&depend_tx);
do_sync_xor(dest, src_list, offset, src_cnt, len,
flags, depend_tx, cb_fn, cb_param);
@ -309,17 +283,10 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
tx = async_xor(dest, src_list, offset, src_cnt, len, xor_flags,
depend_tx, NULL, NULL);
if (tx) {
if (dma_wait_for_async_tx(tx) == DMA_ERROR)
panic("%s: DMA_ERROR waiting for tx\n",
__func__);
async_tx_ack(tx);
}
async_tx_quiesce(&tx);
*result = page_is_zero(dest, offset, len) ? 0 : 1;
tx = NULL;
async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
}

2
include/linux/async_tx.h
View File

@ -152,4 +152,6 @@ struct dma_async_tx_descriptor *
async_trigger_callback(enum async_tx_flags flags,
struct dma_async_tx_descriptor *depend_tx,
dma_async_tx_callback cb_fn, void *cb_fn_param);
void async_tx_quiesce(struct dma_async_tx_descriptor **tx);
#endif /* _ASYNC_TX_H_ */