Differential D10729 Diff 45149 head/sys/x86/include/bus_dma.h

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head/sys/x86/include/bus_dma.h

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				/*-
				* Copyright (c) 2017 Jason A. Harmening.
				* All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* $FreeBSD$
				*/

				#ifndef _X86_BUS_DMA_H_
				#define _X86_BUS_DMA_H_

				#define WANT_INLINE_DMAMAP
				#include <sys/bus_dma.h>
				#include <sys/_null.h>

				#include <x86/busdma_impl.h>

				/*
				* Allocate a handle for mapping from kva/uva/physical
				* address space into bus device space.
				*/
				static inline int
				bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->map_create(dmat, flags, mapp));
				}

				/*
				* Destroy a handle for mapping from kva/uva/physical
				* address space into bus device space.
				*/
				static inline int
				bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->map_destroy(dmat, map));
				}

				/*
				* Allocate a piece of memory that can be efficiently mapped into
				* bus device space based on the constraints lited in the dma tag.
				* A dmamap to for use with dmamap_load is also allocated.
				*/
				static inline int
				bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
				bus_dmamap_t *mapp)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->mem_alloc(dmat, vaddr, flags, mapp));
				}

				/*
				* Free a piece of memory and it's allociated dmamap, that was allocated
				* via bus_dmamem_alloc. Make the same choice for free/contigfree.
				*/
				static inline void
				bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				tc->impl->mem_free(dmat, vaddr, map);
				}

				/*
				* Release the mapping held by map.
				*/
				static inline void
				bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
				{
				struct bus_dma_tag_common *tc;

				if (map != NULL) {
				tc = (struct bus_dma_tag_common *)dmat;
				tc->impl->map_unload(dmat, map);
				}
				}

				static inline void
				bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
				{
				struct bus_dma_tag_common *tc;

				if (map != NULL) {
				tc = (struct bus_dma_tag_common *)dmat;
				tc->impl->map_sync(dmat, map, op);
				}
				}

				/*
				* Utility function to load a physical buffer. segp contains
				* the starting segment on entrace, and the ending segment on exit.
				*/
				static inline int
				_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
				bus_size_t buflen, int flags, bus_dma_segment_t segs, int segp)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->load_phys(dmat, map, buf, buflen, flags, segs,
				segp));
				}

				static inline int
				_bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map, struct vm_page **ma,
				bus_size_t tlen, int ma_offs, int flags, bus_dma_segment_t *segs,
				int *segp)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->load_ma(dmat, map, ma, tlen, ma_offs, flags,
				segs, segp));
				}

				/*
				* Utility function to load a linear buffer. segp contains
				* the starting segment on entrace, and the ending segment on exit.
				*/
				static inline int
				_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
				bus_size_t buflen, struct pmap pmap, int flags, bus_dma_segment_t segs,
				int *segp)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->load_buffer(dmat, map, buf, buflen, pmap, flags, segs,
				segp));
				}

				static inline void
				_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
				struct memdesc mem, bus_dmamap_callback_t callback, void *callback_arg)
				{
				struct bus_dma_tag_common *tc;

				if (map != NULL) {
				tc = (struct bus_dma_tag_common *)dmat;
				tc->impl->map_waitok(dmat, map, mem, callback, callback_arg);
				}
				}

				static inline bus_dma_segment_t *
				_bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
				bus_dma_segment_t *segs, int nsegs, int error)
				{
				struct bus_dma_tag_common *tc;

				tc = (struct bus_dma_tag_common *)dmat;
				return (tc->impl->map_complete(dmat, map, segs, nsegs, error));
				}

				#endif /* !_X86_BUS_DMA_H_ */