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_ */ 38