diff options
Diffstat (limited to 'include/linux/dmaengine.h')
| -rw-r--r-- | include/linux/dmaengine.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index cf7c85d408ad..01f27e8a69b7 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -612,6 +612,10 @@ struct dma_tx_state { * code * @device_control: manipulate all pending operations on a channel, returns * zero or error code + * @device_pause: Pauses any transfer happening on a channel. Returns + * 0 or an error code + * @device_resume: Resumes any transfer on a channel previously + * paused. Returns 0 or an error code * @device_tx_status: poll for transaction completion, the optional * txstate parameter can be supplied with a pointer to get a * struct with auxiliary transfer status information, otherwise the call @@ -681,6 +685,8 @@ struct dma_device { struct dma_slave_config *config); int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg); + int (*device_pause)(struct dma_chan *chan); + int (*device_resume)(struct dma_chan *chan); enum dma_status (*device_tx_status)(struct dma_chan *chan, dma_cookie_t cookie, @@ -795,11 +801,17 @@ static inline int dmaengine_terminate_all(struct dma_chan *chan) static inline int dmaengine_pause(struct dma_chan *chan) { + if (chan->device->device_pause) + return chan->device->device_pause(chan); + return dmaengine_device_control(chan, DMA_PAUSE, 0); } static inline int dmaengine_resume(struct dma_chan *chan) { + if (chan->device->device_resume) + return chan->device->device_resume(chan); + return dmaengine_device_control(chan, DMA_RESUME, 0); } |