freebsd-dev/sys/x86/include/bus_dma.h
Tycho Nightingale b961c0f244 Allow loading the same DMA address multiple times without any prior
unload for the LinuxKPI.

Reviewed by:	kib, zeising
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D20181
2019-05-16 17:41:16 +00:00

196 lines
5.5 KiB
C

/*-
* 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>
/*
* Is DMA address 1:1 mapping of physical address
*/
static inline bool
bus_dma_id_mapped(bus_dma_tag_t dmat, vm_paddr_t buf, bus_size_t buflen)
{
struct bus_dma_tag_common *tc;
tc = (struct bus_dma_tag_common *)dmat;
return (tc->impl->id_mapped(dmat, buf, buflen));
}
/*
* 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_ */