aboutsummaryrefslogtreecommitdiff
path: root/crypto/async_tx
diff options
context:
space:
mode:
Diffstat (limited to 'crypto/async_tx')
-rw-r--r--crypto/async_tx/async_memcpy.c27
-rw-r--r--crypto/async_tx/async_memset.c20
-rw-r--r--crypto/async_tx/async_xor.c94
3 files changed, 83 insertions, 58 deletions
diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index e8c8956ef1d..faca0bc5206 100644
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -48,26 +48,25 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
{
struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY);
struct dma_device *device = chan ? chan->device : NULL;
- int int_en = cb_fn ? 1 : 0;
- struct dma_async_tx_descriptor *tx = device ?
- device->device_prep_dma_memcpy(chan, len,
- int_en) : NULL;
+ struct dma_async_tx_descriptor *tx = NULL;
- if (tx) { /* run the memcpy asynchronously */
- dma_addr_t addr;
+ if (device) {
+ dma_addr_t dma_dest, dma_src;
- pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
+ dma_dest = dma_map_page(device->dev, dest, dest_offset, len,
+ DMA_FROM_DEVICE);
- addr = dma_map_page(device->dev, dest, dest_offset, len,
- DMA_FROM_DEVICE);
- tx->tx_set_dest(addr, tx, 0);
+ dma_src = dma_map_page(device->dev, src, src_offset, len,
+ DMA_TO_DEVICE);
- addr = dma_map_page(device->dev, src, src_offset, len,
- DMA_TO_DEVICE);
- tx->tx_set_src(addr, tx, 0);
+ tx = device->device_prep_dma_memcpy(chan, dma_dest, dma_src,
+ len, cb_fn != NULL);
+ }
+ if (tx) {
+ pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
- } else { /* run the memcpy synchronously */
+ } else {
void *dest_buf, *src_buf;
pr_debug("%s: (sync) len: %zu\n", __FUNCTION__, len);
diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 76097280395..0c94851cfd3 100644
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -48,20 +48,20 @@ async_memset(struct page *dest, int val, unsigned int offset,
{
struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMSET);
struct dma_device *device = chan ? chan->device : NULL;
- int int_en = cb_fn ? 1 : 0;
- struct dma_async_tx_descriptor *tx = device ?
- device->device_prep_dma_memset(chan, val, len,
- int_en) : NULL;
+ struct dma_async_tx_descriptor *tx = NULL;
- if (tx) { /* run the memset asynchronously */
- dma_addr_t dma_addr;
+ if (device) {
+ dma_addr_t dma_dest;
- pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
-
- dma_addr = dma_map_page(device->dev, dest, offset, len,
+ dma_dest = dma_map_page(device->dev, dest, offset, len,
DMA_FROM_DEVICE);
- tx->tx_set_dest(dma_addr, tx, 0);
+ tx = device->device_prep_dma_memset(chan, dma_dest, val, len,
+ cb_fn != NULL);
+ }
+
+ if (tx) {
+ pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
} else { /* run the memset synchronously */
void *dest_buf;
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index cb41e6bbbc4..12cba1a4205 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -34,29 +34,46 @@
* This routine is marked __always_inline so it can be compiled away
* when CONFIG_DMA_ENGINE=n
*/
-static __always_inline void
-do_async_xor(struct dma_async_tx_descriptor *tx, struct dma_device *device,
+static __always_inline struct dma_async_tx_descriptor *
+do_async_xor(struct dma_device *device,
struct dma_chan *chan, struct page *dest, struct page **src_list,
unsigned int offset, unsigned 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)
{
- dma_addr_t dma_addr;
+ dma_addr_t dma_dest;
+ dma_addr_t *dma_src = (dma_addr_t *) src_list;
+ struct dma_async_tx_descriptor *tx;
int i;
pr_debug("%s: len: %zu\n", __FUNCTION__, len);
- dma_addr = dma_map_page(device->dev, dest, offset, len,
+ dma_dest = dma_map_page(device->dev, dest, offset, len,
DMA_FROM_DEVICE);
- tx->tx_set_dest(dma_addr, tx, 0);
- for (i = 0; i < src_cnt; i++) {
- dma_addr = dma_map_page(device->dev, src_list[i],
- offset, len, DMA_TO_DEVICE);
- tx->tx_set_src(dma_addr, tx, i);
+ for (i = 0; i < src_cnt; i++)
+ dma_src[i] = dma_map_page(device->dev, src_list[i], offset,
+ len, DMA_TO_DEVICE);
+
+ /* Since we have clobbered the src_list we are committed
+ * to doing this asynchronously. Drivers force forward progress
+ * in case they can not provide a descriptor
+ */
+ tx = device->device_prep_dma_xor(chan, dma_dest, dma_src, src_cnt, len,
+ cb_fn != NULL);
+ if (!tx) {
+ if (depend_tx)
+ dma_wait_for_async_tx(depend_tx);
+
+ while (!tx)
+ tx = device->device_prep_dma_xor(chan, dma_dest,
+ dma_src, src_cnt, len,
+ cb_fn != NULL);
}
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
+
+ return tx;
}
static void
@@ -118,7 +135,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
void *_cb_param;
unsigned long local_flags;
int xor_src_cnt;
- int i = 0, src_off = 0, int_en;
+ int i = 0, src_off = 0;
BUG_ON(src_cnt <= 1);
@@ -138,20 +155,11 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
_cb_param = cb_param;
}
- int_en = _cb_fn ? 1 : 0;
-
- tx = device->device_prep_dma_xor(
- chan, xor_src_cnt, len, int_en);
-
- if (tx) {
- do_async_xor(tx, device, chan, dest,
- &src_list[src_off], offset, xor_src_cnt, len,
- local_flags, depend_tx, _cb_fn,
- _cb_param);
- } else /* fall through */
- goto xor_sync;
+ tx = do_async_xor(device, chan, dest,
+ &src_list[src_off], offset,
+ xor_src_cnt, len, local_flags,
+ depend_tx, _cb_fn, _cb_param);
} else { /* run the xor synchronously */
-xor_sync:
/* in the sync case the dest is an implied source
* (assumes the dest is at the src_off index)
*/
@@ -254,23 +262,31 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
{
struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_ZERO_SUM);
struct dma_device *device = chan ? chan->device : NULL;
- int int_en = cb_fn ? 1 : 0;
- struct dma_async_tx_descriptor *tx = device ?
- device->device_prep_dma_zero_sum(chan, src_cnt, len, result,
- int_en) : NULL;
- int i;
+ struct dma_async_tx_descriptor *tx = NULL;
BUG_ON(src_cnt <= 1);
- if (tx) {
- dma_addr_t dma_addr;
+ if (device) {
+ dma_addr_t *dma_src = (dma_addr_t *) src_list;
+ int i;
pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
- for (i = 0; i < src_cnt; i++) {
- dma_addr = dma_map_page(device->dev, src_list[i],
- offset, len, DMA_TO_DEVICE);
- tx->tx_set_src(dma_addr, tx, i);
+ for (i = 0; i < src_cnt; i++)
+ dma_src[i] = dma_map_page(device->dev, src_list[i],
+ offset, len, DMA_TO_DEVICE);
+
+ tx = device->device_prep_dma_zero_sum(chan, dma_src, src_cnt,
+ len, result,
+ cb_fn != NULL);
+ if (!tx) {
+ if (depend_tx)
+ dma_wait_for_async_tx(depend_tx);
+
+ while (!tx)
+ tx = device->device_prep_dma_zero_sum(chan,
+ dma_src, src_cnt, len, result,
+ cb_fn != NULL);
}
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
@@ -305,6 +321,16 @@ EXPORT_SYMBOL_GPL(async_xor_zero_sum);
static int __init async_xor_init(void)
{
+ #ifdef CONFIG_DMA_ENGINE
+ /* To conserve stack space the input src_list (array of page pointers)
+ * is reused to hold the array of dma addresses passed to the driver.
+ * This conversion is only possible when dma_addr_t is less than the
+ * the size of a pointer. HIGHMEM64G is known to violate this
+ * assumption.
+ */
+ BUILD_BUG_ON(sizeof(dma_addr_t) > sizeof(struct page *));
+ #endif
+
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 03:11:31 +0000