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authorDan Williams <dan.j.williams@intel.com>2008-04-17 20:17:26 -0700
committerDan Williams <dan.j.williams@intel.com>2008-04-17 13:25:54 -0700
commit636bdeaa1243327501edfd2a597ed7443eb4239a (patch)
tree59b894f124e3664ea4a537d7c07c527abdb9c8da /crypto/async_tx/async_tx.c
parentc4fe15541d0ef5cc8cc1ce43057663851f8fc387 (diff)
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dmaengine: ack to flags: make use of the unused bits in the 'ack' field
'ack' is currently a simple integer that flags whether or not a client is done touching fields in the given descriptor. It is effectively just a single bit of information. Converting this to a flags parameter allows the other bits to be put to use to control completion actions, like dma-unmap, and capture results, like xor-zero-sum == 0. Changes are one of: 1/ convert all open-coded ->ack manipulations to use async_tx_ack and async_tx_test_ack. 2/ set the ack bit at prep time where possible 3/ make drivers store the flags at prep time 4/ add flags to the device_prep_dma_interrupt prototype Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto/async_tx/async_tx.c')
-rw-r--r--crypto/async_tx/async_tx.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index 69756164b61..c6e772fc5cc 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -446,7 +446,7 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx,
* otherwise poll for completion
*/
if (dma_has_cap(DMA_INTERRUPT, device->cap_mask))
- intr_tx = device->device_prep_dma_interrupt(chan);
+ intr_tx = device->device_prep_dma_interrupt(chan, 0);
else
intr_tx = NULL;
@@ -515,7 +515,8 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx,
* 2/ dependencies are 1:1 i.e. two transactions can
* not depend on the same parent
*/
- BUG_ON(depend_tx->ack || depend_tx->next || tx->parent);
+ BUG_ON(async_tx_test_ack(depend_tx) || depend_tx->next ||
+ tx->parent);
/* the lock prevents async_tx_run_dependencies from missing
* the setting of ->next when ->parent != NULL
@@ -594,7 +595,7 @@ async_trigger_callback(enum async_tx_flags flags,
if (device && !dma_has_cap(DMA_INTERRUPT, device->cap_mask))
device = NULL;
- tx = device ? device->device_prep_dma_interrupt(chan) : NULL;
+ tx = device ? device->device_prep_dma_interrupt(chan, 0) : NULL;
} else
tx = NULL;
@@ -610,7 +611,7 @@ async_trigger_callback(enum async_tx_flags flags,
/* if ack is already set then we cannot be sure
* we are referring to the correct operation
*/
- BUG_ON(depend_tx->ack);
+ 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__);