include/linux/dma/pxa-dma.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _PXA_DMA_H_
   3 #define _PXA_DMA_H_
   4
   5 enum pxad_chan_prio {
   6         PXAD_PRIO_HIGHEST = 0,
   7         PXAD_PRIO_NORMAL,
   8         PXAD_PRIO_LOW,
   9         PXAD_PRIO_LOWEST,
  10 };
  11
  12 /**
  13  * struct pxad_param - dma channel request parameters
  14  * @drcmr: requestor line number
  15  * @prio: minimal mandatory priority of the channel
  16  *
  17  * If a requested channel is granted, its priority will be at least @prio,
  18  * ie. if PXAD_PRIO_LOW is required, the requested channel will be either
  19  * PXAD_PRIO_LOW, PXAD_PRIO_NORMAL or PXAD_PRIO_HIGHEST.
  20  */
  21 struct pxad_param {
  22         unsigned int drcmr;
  23         enum pxad_chan_prio prio;
  24 };
  25
  26 struct dma_chan;
  27
  28 #ifdef CONFIG_PXA_DMA
  29 bool pxad_filter_fn(struct dma_chan *chan, void *param);
  30 #else
  31 static inline bool pxad_filter_fn(struct dma_chan *chan, void *param)
  32 {
  33         return false;
  34 }
  35 #endif
  36
  37 #endif /* _PXA_DMA_H_ */