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authorDan Williams <dan.j.williams@intel.com>2008-02-02 19:49:58 -0700
committerDan Williams <dan.j.williams@intel.com>2008-02-06 10:12:18 -0700
commitd4c56f97ff21df405d0cebe11f49e3c3c79662b5 (patch)
treee6b0de433d7c985982ac12815998242a786d87b2 /include/linux/dmaengine.h
parent0036731c88fdb5bf4f04a796a30b5e445fc57f54 (diff)
downloadop-kernel-dev-d4c56f97ff21df405d0cebe11f49e3c3c79662b5.zip
op-kernel-dev-d4c56f97ff21df405d0cebe11f49e3c3c79662b5.tar.gz
async_tx: replace 'int_en' with operation preparation flags
Pass a full set of flags to drivers' per-operation 'prep' routines. Currently the only flag passed is DMA_PREP_INTERRUPT. The expectation is that arch-specific async_tx_find_channel() implementations can exploit this capability to find the best channel for an operation. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Reviewed-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/linux/dmaengine.h')
-rw-r--r--include/linux/dmaengine.h17
1 files changed, 13 insertions, 4 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index b0864f5..acbb364 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -95,6 +95,15 @@ enum dma_transaction_type {
#define DMA_TX_TYPE_END (DMA_INTERRUPT + 1)
/**
+ * enum dma_prep_flags - DMA flags to augment operation preparation
+ * @DMA_PREP_INTERRUPT - trigger an interrupt (callback) upon completion of
+ * this transaction
+ */
+enum dma_prep_flags {
+ DMA_PREP_INTERRUPT = (1 << 0),
+};
+
+/**
* dma_cap_mask_t - capabilities bitmap modeled after cpumask_t.
* See linux/cpumask.h
*/
@@ -274,16 +283,16 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)(
struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
- size_t len, int int_en);
+ size_t len, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_xor)(
struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
- unsigned int src_cnt, size_t len, int int_en);
+ unsigned int src_cnt, size_t len, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_zero_sum)(
struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt,
- size_t len, u32 *result, int int_en);
+ size_t len, u32 *result, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_memset)(
struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
- int int_en);
+ unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)(
struct dma_chan *chan);
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