1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Xilinx Video DMA 4 * 5 * Copyright (C) 2013-2015 Ideas on Board 6 * Copyright (C) 2013-2015 Xilinx, Inc. 7 * 8 * Contacts: Hyun Kwon <hyun.kwon@xilinx.com> 9 * Laurent Pinchart <laurent.pinchart@ideasonboard.com> 10 */ 11 12 #ifndef __XILINX_VIP_DMA_H__ 13 #define __XILINX_VIP_DMA_H__ 14 15 #include <linux/dmaengine.h> 16 #include <linux/mutex.h> 17 #include <linux/spinlock.h> 18 #include <linux/videodev2.h> 19 20 #include <media/media-entity.h> 21 #include <media/v4l2-dev.h> 22 #include <media/videobuf2-v4l2.h> 23 24 struct dma_chan; 25 struct xvip_composite_device; 26 struct xvip_video_format; 27 28 /** 29 * struct xvip_pipeline - Xilinx Video IP pipeline structure 30 * @pipe: media pipeline 31 * @lock: protects the pipeline @stream_count 32 * @use_count: number of DMA engines using the pipeline 33 * @stream_count: number of DMA engines currently streaming 34 * @num_dmas: number of DMA engines in the pipeline 35 * @output: DMA engine at the output of the pipeline 36 */ 37 struct xvip_pipeline { 38 struct media_pipeline pipe; 39 40 struct mutex lock; 41 unsigned int use_count; 42 unsigned int stream_count; 43 44 unsigned int num_dmas; 45 struct xvip_dma *output; 46 }; 47 48 static inline struct xvip_pipeline *to_xvip_pipeline(struct video_device *vdev) 49 { 50 struct media_pipeline *pipe = video_device_pipeline(vdev); 51 52 if (!pipe) 53 return NULL; 54 55 return container_of(pipe, struct xvip_pipeline, pipe); 56 } 57 58 /** 59 * struct xvip_dma - Video DMA channel 60 * @list: list entry in a composite device dmas list 61 * @video: V4L2 video device associated with the DMA channel 62 * @pad: media pad for the video device entity 63 * @xdev: composite device the DMA channel belongs to 64 * @pipe: pipeline belonging to the DMA channel 65 * @port: composite device DT node port number for the DMA channel 66 * @lock: protects the @format, @fmtinfo and @queue fields 67 * @format: active V4L2 pixel format 68 * @fmtinfo: format information corresponding to the active @format 69 * @queue: vb2 buffers queue 70 * @sequence: V4L2 buffers sequence number 71 * @queued_bufs: list of queued buffers 72 * @queued_lock: protects the buf_queued list 73 * @dma: DMA engine channel 74 * @align: transfer alignment required by the DMA channel (in bytes) 75 * @xt: dma interleaved template for dma configuration 76 * @sgl: data chunk structure for dma_interleaved_template 77 */ 78 struct xvip_dma { 79 struct list_head list; 80 struct video_device video; 81 struct media_pad pad; 82 83 struct xvip_composite_device *xdev; 84 struct xvip_pipeline pipe; 85 unsigned int port; 86 87 struct mutex lock; 88 struct v4l2_pix_format format; 89 const struct xvip_video_format *fmtinfo; 90 91 struct vb2_queue queue; 92 unsigned int sequence; 93 94 struct list_head queued_bufs; 95 spinlock_t queued_lock; 96 97 struct dma_chan *dma; 98 unsigned int align; 99 struct dma_interleaved_template xt; 100 struct data_chunk sgl[1]; 101 }; 102 103 #define to_xvip_dma(vdev) container_of(vdev, struct xvip_dma, video) 104 105 int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma, 106 enum v4l2_buf_type type, unsigned int port); 107 void xvip_dma_cleanup(struct xvip_dma *dma); 108 109 #endif /* __XILINX_VIP_DMA_H__ */ 110