Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/riscv/include/bus_dma_impl.h
39507 views
1
/*-

2
 * Copyright (c) 2013 The FreeBSD Foundation

3
 *

4
 * This software was developed by Konstantin Belousov <[email protected]>

5
 * under sponsorship from the FreeBSD Foundation.

6
 *

7
 * Redistribution and use in source and binary forms, with or without

8
 * modification, are permitted provided that the following conditions

9
 * are met:

10
 * 1. Redistributions of source code must retain the above copyright

11
 *    notice, this list of conditions and the following disclaimer.

12
 * 2. Redistributions in binary form must reproduce the above copyright

13
 *    notice, this list of conditions and the following disclaimer in the

14
 *    documentation and/or other materials provided with the distribution.

15
 *

16
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

17
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

18
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

19
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

20
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

21
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

22
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

23
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

24
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

25
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

26
 * SUCH DAMAGE.

27
 */

28


29
#ifndef _MACHINE_BUS_DMA_IMPL_H_

30
#define	_MACHINE_BUS_DMA_IMPL_H_

31


32
struct bus_dma_tag_common {

33
	struct bus_dma_impl *impl;

34
	bus_size_t	  alignment;

35
	bus_addr_t	  boundary;

36
	bus_addr_t	  lowaddr;

37
	bus_addr_t	  highaddr;

38
	bus_size_t	  maxsize;

39
	u_int		  nsegments;

40
	bus_size_t	  maxsegsz;

41
	int		  flags;

42
	bus_dma_lock_t	 *lockfunc;

43
	void		 *lockfuncarg;

44
};

45


46
struct bus_dma_impl {

47
	int (*tag_create)(bus_dma_tag_t parent,

48
	    bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,

49
	    bus_addr_t highaddr, bus_size_t maxsize, int nsegments,

50
	    bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,

51
	    void *lockfuncarg, bus_dma_tag_t *dmat);

52
	int (*tag_destroy)(bus_dma_tag_t dmat);

53
	int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);

54
	int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);

55
	int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,

56
	    bus_dmamap_t *mapp);

57
	void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);

58
	int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,

59
	    struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,

60
	    bus_dma_segment_t *segs, int *segp);

61
	int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,

62
	    vm_paddr_t buf, bus_size_t buflen, int flags,

63
	    bus_dma_segment_t *segs, int *segp);

64
	int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,

65
	    void *buf, bus_size_t buflen, struct pmap *pmap, int flags,

66
	    bus_dma_segment_t *segs, int *segp);

67
	void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,

68
	    struct memdesc *mem, bus_dmamap_callback_t *callback,

69
	    void *callback_arg);

70
	bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,

71
	    bus_dma_segment_t *segs, int nsegs, int error);

72
	void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);

73
	void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,

74
	    bus_dmasync_op_t op);

75
};

76


77
int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,

78
    bus_size_t alignment,

79
    bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,

80
    bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, int flags,

81
    bus_dma_lock_t *lockfunc, void *lockfuncarg, size_t sz, void **dmat);

82


83
extern struct bus_dma_impl bus_dma_bounce_impl;

84


85
#endif

86


87