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async_tx: replace 'int_en' with operation preparation flags

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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>
This commit is contained in:
Dan Williams 2008-02-02 19:49:58 -07:00
parent 0036731c88
commit d4c56f97ff
8 changed files with 62 additions and 43 deletions
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17
include/linux/dmaengine.h
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@ -94,6 +94,15 @@ enum dma_transaction_type {
/* last transaction type for creation of the capabilities mask */
#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);