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authorHerbert Xu <herbert@gondor.apana.org.au>2010-05-26 01:36:58 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2010-05-26 01:36:58 (GMT)
commit50d1e9302bab7d35dae7146f8c468e0943015616 (patch)
treefa05320f4a297bd582686574cf94ba444e264b3f /crypto
parent7cc2835083aedfde42de02301005a5555e00c4b1 (diff)
parentdc4ccfd15d4fc7a91ddf222bc5eed5cc4bcf10e6 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/crypto-2.6
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Kconfig2
-rw-r--r--crypto/async_tx/async_raid6_recov.c21
-rw-r--r--crypto/async_tx/async_tx.c46
3 files changed, 33 insertions, 36 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 403857a..9d9434f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -28,7 +28,7 @@ config CRYPTO_FIPS
This options enables the fips boot option which is
required if you want to system to operate in a FIPS 200
certification. You should say no unless you know what
- this is. Note that CRYPTO_ANSI_CPRNG is requred if this
+ this is. Note that CRYPTO_ANSI_CPRNG is required if this
option is selected
config CRYPTO_ALGAPI
diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
index 943f2ab..ce038d8 100644
--- a/crypto/async_tx/async_raid6_recov.c
+++ b/crypto/async_tx/async_raid6_recov.c
@@ -324,6 +324,7 @@ struct dma_async_tx_descriptor *
async_raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
struct page **blocks, struct async_submit_ctl *submit)
{
+ void *scribble = submit->scribble;
int non_zero_srcs, i;
BUG_ON(faila == failb);
@@ -332,11 +333,13 @@ async_raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
pr_debug("%s: disks: %d len: %zu\n", __func__, disks, bytes);
- /* we need to preserve the contents of 'blocks' for the async
- * case, so punt to synchronous if a scribble buffer is not available
+ /* if a dma resource is not available or a scribble buffer is not
+ * available punt to the synchronous path. In the 'dma not
+ * available' case be sure to use the scribble buffer to
+ * preserve the content of 'blocks' as the caller intended.
*/
- if (!submit->scribble) {
- void **ptrs = (void **) blocks;
+ if (!async_dma_find_channel(DMA_PQ) || !scribble) {
+ void **ptrs = scribble ? scribble : (void **) blocks;
async_tx_quiesce(&submit->depend_tx);
for (i = 0; i < disks; i++)
@@ -406,11 +409,13 @@ async_raid6_datap_recov(int disks, size_t bytes, int faila,
pr_debug("%s: disks: %d len: %zu\n", __func__, disks, bytes);
- /* we need to preserve the contents of 'blocks' for the async
- * case, so punt to synchronous if a scribble buffer is not available
+ /* if a dma resource is not available or a scribble buffer is not
+ * available punt to the synchronous path. In the 'dma not
+ * available' case be sure to use the scribble buffer to
+ * preserve the content of 'blocks' as the caller intended.
*/
- if (!scribble) {
- void **ptrs = (void **) blocks;
+ if (!async_dma_find_channel(DMA_PQ) || !scribble) {
+ void **ptrs = scribble ? scribble : (void **) blocks;
async_tx_quiesce(&submit->depend_tx);
for (i = 0; i < disks; i++)
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index f9cdf04..7f2c00a 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -81,18 +81,13 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx,
struct dma_device *device = chan->device;
struct dma_async_tx_descriptor *intr_tx = (void *) ~0;
- #ifdef CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH
- BUG();
- #endif
-
/* first check to see if we can still append to depend_tx */
- spin_lock_bh(&depend_tx->lock);
- if (depend_tx->parent && depend_tx->chan == tx->chan) {
- tx->parent = depend_tx;
- depend_tx->next = tx;
+ txd_lock(depend_tx);
+ if (txd_parent(depend_tx) && depend_tx->chan == tx->chan) {
+ txd_chain(depend_tx, tx);
intr_tx = NULL;
}
- spin_unlock_bh(&depend_tx->lock);
+ txd_unlock(depend_tx);
/* attached dependency, flush the parent channel */
if (!intr_tx) {
@@ -111,24 +106,22 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx,
if (intr_tx) {
intr_tx->callback = NULL;
intr_tx->callback_param = NULL;
- tx->parent = intr_tx;
- /* safe to set ->next outside the lock since we know we are
+ /* safe to chain outside the lock since we know we are
* not submitted yet
*/
- intr_tx->next = tx;
+ txd_chain(intr_tx, tx);
/* check if we need to append */
- spin_lock_bh(&depend_tx->lock);
- if (depend_tx->parent) {
- intr_tx->parent = depend_tx;
- depend_tx->next = intr_tx;
+ txd_lock(depend_tx);
+ if (txd_parent(depend_tx)) {
+ txd_chain(depend_tx, intr_tx);
async_tx_ack(intr_tx);
intr_tx = NULL;
}
- spin_unlock_bh(&depend_tx->lock);
+ txd_unlock(depend_tx);
if (intr_tx) {
- intr_tx->parent = NULL;
+ txd_clear_parent(intr_tx);
intr_tx->tx_submit(intr_tx);
async_tx_ack(intr_tx);
}
@@ -176,21 +169,20 @@ 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(async_tx_test_ack(depend_tx) || depend_tx->next ||
- tx->parent);
+ BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) ||
+ txd_parent(tx));
/* the lock prevents async_tx_run_dependencies from missing
* the setting of ->next when ->parent != NULL
*/
- spin_lock_bh(&depend_tx->lock);
- if (depend_tx->parent) {
+ txd_lock(depend_tx);
+ if (txd_parent(depend_tx)) {
/* we have a parent so we can not submit directly
* if we are staying on the same channel: append
* else: channel switch
*/
if (depend_tx->chan == chan) {
- tx->parent = depend_tx;
- depend_tx->next = tx;
+ txd_chain(depend_tx, tx);
s = ASYNC_TX_SUBMITTED;
} else
s = ASYNC_TX_CHANNEL_SWITCH;
@@ -203,7 +195,7 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx,
else
s = ASYNC_TX_CHANNEL_SWITCH;
}
- spin_unlock_bh(&depend_tx->lock);
+ txd_unlock(depend_tx);
switch (s) {
case ASYNC_TX_SUBMITTED:
@@ -212,12 +204,12 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx,
async_tx_channel_switch(depend_tx, tx);
break;
case ASYNC_TX_DIRECT_SUBMIT:
- tx->parent = NULL;
+ txd_clear_parent(tx);
tx->tx_submit(tx);
break;
}
} else {
- tx->parent = NULL;
+ txd_clear_parent(tx);
tx->tx_submit(tx);
}

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