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
pxad_filter_fn(struct dma_chan * chan,void * param)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_ */
38
