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Commit d2c52b79 authored by Dan Williams's avatar Dan Williams
Browse files

async_tx: export async_tx_quiesce 



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

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 669ab0b2

crypto/async_tx/async_memcpy.c

+1 −9
Original line number Diff line number Diff line
@@ -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;

crypto/async_tx/async_memset.c

+1 −9
Original line number Diff line number Diff line
@@ -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);

crypto/async_tx/async_tx.c

+20 −9
Original line number Diff line number Diff line
@@ -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);

crypto/async_tx/async_xor.c

+2 −35
Original line number Diff line number Diff line
@@ -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);

	}

include/linux/async_tx.h

+2 −0
Original line number Diff line number Diff line
@@ -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_ */