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freebsd-nq/sys/arm64/include/bus_dma_impl.h

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Port x86 busdma to ARM64 The x86 busdma subsystem allows using multiple implementations. By default the classic bounce buffer approach is used, however on systems with IOMMU it could be in runtime switched to more efficient hardware accelerated implementation. This commit adds ARM64 port of the x86 busdma framework and bounce buffer backend. It is ready to use on IO coherent systems. If the IO coherency cannot be guaranteed, the cache management operations have to be added to this code in places marked by /* XXX ARM64TODO (...) */ comments. Also IOMMU support might be added by registering another busdma implementation like it is already done on the x86. Reviewed by: andrew, emaste Obtained from: Semihalf Sponsored by: The FreeBSD Foundation
2015-05-08 18:47:19 +00:00
/*-
* Copyright (c) 2013 The FreeBSD Foundation
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* 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 _MACHINE_BUS_DMA_IMPL_H_
#define _MACHINE_BUS_DMA_IMPL_H_
struct bus_dma_tag_common {
struct bus_dma_impl *impl;
struct bus_dma_tag_common *parent;
bus_size_t alignment;
bus_addr_t boundary;
bus_addr_t lowaddr;
bus_addr_t highaddr;
bus_dma_filter_t *filter;
void *filterarg;
bus_size_t maxsize;
u_int nsegments;
bus_size_t maxsegsz;
int flags;
bus_dma_lock_t *lockfunc;
void *lockfuncarg;
int ref_count;
o Add the domain member to the struct bus_dma_tag_common as required by busdma_iommu.c. o Add tag_set_domain() pointer to the struct bus_dma_impl as well. Sponsored by: Innovate DSbD
2020-10-27 15:29:53 +00:00
int domain;
Port x86 busdma to ARM64 The x86 busdma subsystem allows using multiple implementations. By default the classic bounce buffer approach is used, however on systems with IOMMU it could be in runtime switched to more efficient hardware accelerated implementation. This commit adds ARM64 port of the x86 busdma framework and bounce buffer backend. It is ready to use on IO coherent systems. If the IO coherency cannot be guaranteed, the cache management operations have to be added to this code in places marked by /* XXX ARM64TODO (...) */ comments. Also IOMMU support might be added by registering another busdma implementation like it is already done on the x86. Reviewed by: andrew, emaste Obtained from: Semihalf Sponsored by: The FreeBSD Foundation
2015-05-08 18:47:19 +00:00
};
struct bus_dma_impl {
int (*tag_create)(bus_dma_tag_t parent,
bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
bus_addr_t highaddr, bus_dma_filter_t *filter,
void *filterarg, bus_size_t maxsize, int nsegments,
bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
void *lockfuncarg, bus_dma_tag_t *dmat);
int (*tag_destroy)(bus_dma_tag_t dmat);
o Add the domain member to the struct bus_dma_tag_common as required by busdma_iommu.c. o Add tag_set_domain() pointer to the struct bus_dma_impl as well. Sponsored by: Innovate DSbD
2020-10-27 15:29:53 +00:00
int (*tag_set_domain)(bus_dma_tag_t);
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
bool (*id_mapped)(bus_dma_tag_t, vm_paddr_t, bus_size_t);
Port x86 busdma to ARM64 The x86 busdma subsystem allows using multiple implementations. By default the classic bounce buffer approach is used, however on systems with IOMMU it could be in runtime switched to more efficient hardware accelerated implementation. This commit adds ARM64 port of the x86 busdma framework and bounce buffer backend. It is ready to use on IO coherent systems. If the IO coherency cannot be guaranteed, the cache management operations have to be added to this code in places marked by /* XXX ARM64TODO (...) */ comments. Also IOMMU support might be added by registering another busdma implementation like it is already done on the x86. Reviewed by: andrew, emaste Obtained from: Semihalf Sponsored by: The FreeBSD Foundation
2015-05-08 18:47:19 +00:00
int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
bus_dmamap_t *mapp);
void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
int (*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);
int (*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);
int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
Clean up MD pollution of bus_dma.h: --Remove special-case handling of sparc64 bus_dmamap* functions. Replace with a more generic mechanism that allows MD busdma implementations to generate inline mapping functions by defining WANT_INLINE_DMAMAP in <machine/bus_dma.h>. This is currently useful for sparc64, x86, and arm64, which all implement non-load dmamap operations as simple wrappers around map objects which may be bus- or device-specific. --Remove NULL-checked bus_dmamap macros. Implement the equivalent NULL checks in the inlined x86 implementation. For non-x86 platforms, these checks are a minor pessimization as those platforms do not currently allow NULL maps. NULL maps were originally allowed on arm64, which appears to have been the motivation behind adding arm[64]-specific barriers to bus_dma.h, but that support was removed in r299463. --Simplify the internal interface used by the bus_dmamap_load* variants and move it to bus_dma_internal.h --Fix some drivers that directly include sys/bus_dma.h despite the recommendations of bus_dma(9) Reviewed by: kib (previous revision), marius Differential Revision: https://reviews.freebsd.org/D10729
2017-07-01 05:35:29 +00:00
void *buf, bus_size_t buflen, struct pmap *pmap, int flags,
Port x86 busdma to ARM64 The x86 busdma subsystem allows using multiple implementations. By default the classic bounce buffer approach is used, however on systems with IOMMU it could be in runtime switched to more efficient hardware accelerated implementation. This commit adds ARM64 port of the x86 busdma framework and bounce buffer backend. It is ready to use on IO coherent systems. If the IO coherency cannot be guaranteed, the cache management operations have to be added to this code in places marked by /* XXX ARM64TODO (...) */ comments. Also IOMMU support might be added by registering another busdma implementation like it is already done on the x86. Reviewed by: andrew, emaste Obtained from: Semihalf Sponsored by: The FreeBSD Foundation
2015-05-08 18:47:19 +00:00
bus_dma_segment_t *segs, int *segp);
void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
struct memdesc *mem, bus_dmamap_callback_t *callback,
void *callback_arg);
bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
bus_dma_segment_t *segs, int nsegs, int error);
void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
bus_dmasync_op_t op);
};
void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op);
int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr);
int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
bus_size_t alignment,
bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
void *lockfuncarg, size_t sz, void **dmat);
extern struct bus_dma_impl bus_dma_bounce_impl;
#endif
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