Provide a template for busdma code for RISC-V.
RISC-V ISA specifies no cache management instructions so leave cache operations in cpufunc.h as no-op for now. Note some new hardware comes with their own memory-mapped cache management controller. Tested on HiFive Unleashed board with cgem(4). Reviewed by: markj Obtained from: arm64 Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D20126
This commit is contained in:
parent
6e0e532a90
commit
75cf8837a9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=347225
@ -28,6 +28,7 @@ libkern/memset.c standard
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riscv/riscv/autoconf.c standard
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riscv/riscv/bus_machdep.c standard
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riscv/riscv/bus_space_asm.S standard
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riscv/riscv/busdma_bounce.c standard
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riscv/riscv/busdma_machdep.c standard
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riscv/riscv/clock.c standard
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riscv/riscv/copyinout.S standard
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@ -3,7 +3,139 @@
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#ifndef _MACHINE_BUS_DMA_H_
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#define _MACHINE_BUS_DMA_H_
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#define WANT_INLINE_DMAMAP
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#include <sys/bus_dma.h>
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#include <sys/bus_dma_internal.h>
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#include <machine/bus_dma_impl.h>
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/*
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* Allocate a handle for mapping from kva/uva/physical
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* address space into bus device space.
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*/
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static inline int
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bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->map_create(dmat, flags, mapp));
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}
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/*
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* Destroy a handle for mapping from kva/uva/physical
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* address space into bus device space.
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*/
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static inline int
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bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->map_destroy(dmat, map));
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}
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/*
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* Allocate a piece of memory that can be efficiently mapped into
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* bus device space based on the constraints listed in the dma tag.
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* A dmamap to for use with dmamap_load is also allocated.
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*/
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static inline int
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bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
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bus_dmamap_t *mapp)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->mem_alloc(dmat, vaddr, flags, mapp));
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}
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/*
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* Free a piece of memory and it's allociated dmamap, that was allocated
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* via bus_dmamem_alloc. Make the same choice for free/contigfree.
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*/
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static inline void
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bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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tc->impl->mem_free(dmat, vaddr, map);
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}
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/*
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* Release the mapping held by map.
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*/
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static inline void
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bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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tc->impl->map_unload(dmat, map);
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}
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static inline void
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bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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tc->impl->map_sync(dmat, map, op);
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}
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static inline int
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_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
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bus_size_t buflen, int flags, bus_dma_segment_t *segs, int *segp)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->load_phys(dmat, map, buf, buflen, flags, segs,
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segp));
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}
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static inline int
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_bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map, struct vm_page **ma,
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bus_size_t tlen, int ma_offs, int flags, bus_dma_segment_t *segs,
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int *segp)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->load_ma(dmat, map, ma, tlen, ma_offs, flags,
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segs, segp));
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}
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static inline int
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_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
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bus_size_t buflen, struct pmap *pmap, int flags, bus_dma_segment_t *segs,
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int *segp)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->load_buffer(dmat, map, buf, buflen, pmap, flags, segs,
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segp));
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}
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static inline void
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_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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tc->impl->map_waitok(dmat, map, mem, callback, callback_arg);
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}
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static inline bus_dma_segment_t *
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_bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
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bus_dma_segment_t *segs, int nsegs, int error)
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{
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struct bus_dma_tag_common *tc;
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tc = (struct bus_dma_tag_common *)dmat;
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return (tc->impl->map_complete(dmat, map, segs, nsegs, error));
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}
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#endif /* !_MACHINE_BUS_DMA_H_ */
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96
sys/riscv/include/bus_dma_impl.h
Normal file
96
sys/riscv/include/bus_dma_impl.h
Normal file
@ -0,0 +1,96 @@
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/*-
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* Copyright (c) 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_BUS_DMA_IMPL_H_
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#define _MACHINE_BUS_DMA_IMPL_H_
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struct bus_dma_tag_common {
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struct bus_dma_impl *impl;
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struct bus_dma_tag_common *parent;
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bus_size_t alignment;
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bus_addr_t boundary;
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bus_addr_t lowaddr;
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bus_addr_t highaddr;
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bus_dma_filter_t *filter;
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void *filterarg;
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bus_size_t maxsize;
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u_int nsegments;
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bus_size_t maxsegsz;
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int flags;
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bus_dma_lock_t *lockfunc;
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void *lockfuncarg;
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int ref_count;
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};
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struct bus_dma_impl {
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int (*tag_create)(bus_dma_tag_t parent,
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bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
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bus_addr_t highaddr, bus_dma_filter_t *filter,
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void *filterarg, bus_size_t maxsize, int nsegments,
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bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
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void *lockfuncarg, bus_dma_tag_t *dmat);
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int (*tag_destroy)(bus_dma_tag_t dmat);
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int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
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int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
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int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
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bus_dmamap_t *mapp);
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void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
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int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
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bus_dma_segment_t *segs, int *segp);
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int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
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vm_paddr_t buf, bus_size_t buflen, int flags,
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bus_dma_segment_t *segs, int *segp);
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int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
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void *buf, bus_size_t buflen, struct pmap *pmap, int flags,
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bus_dma_segment_t *segs, int *segp);
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void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct memdesc *mem, bus_dmamap_callback_t *callback,
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void *callback_arg);
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bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
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bus_dma_segment_t *segs, int nsegs, int error);
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void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
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void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
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bus_dmasync_op_t op);
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};
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void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op);
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int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr);
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int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
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bus_size_t alignment,
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bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
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bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
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int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
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void *lockfuncarg, size_t sz, void **dmat);
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extern struct bus_dma_impl bus_dma_bounce_impl;
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#endif
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@ -109,6 +109,17 @@ sfence_vma_page(uintptr_t addr)
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#define rdinstret() csr_read64(instret)
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#define rdhpmcounter(n) csr_read64(hpmcounter##n)
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extern int64_t dcache_line_size;
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extern int64_t icache_line_size;
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#define cpu_dcache_wbinv_range(a, s)
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#define cpu_dcache_inv_range(a, s)
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#define cpu_dcache_wb_range(a, s)
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#define cpu_idcache_wbinv_range(a, s)
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#define cpu_icache_sync_range(a, s)
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#define cpu_icache_sync_range_checked(a, s)
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static __inline void
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load_satp(uint64_t val)
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{
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|
1330
sys/riscv/riscv/busdma_bounce.c
Normal file
1330
sys/riscv/riscv/busdma_bounce.c
Normal file
File diff suppressed because it is too large
Load Diff
@ -1,5 +1,13 @@
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/*-
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* Copyright (c) 1997, 1998 Justin T. Gibbs.
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* Copyright (c) 2013, 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Portions of this software were developed by Semihalf
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* under sponsorship of the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -41,62 +49,183 @@ __FBSDID("$FreeBSD$");
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/bus_dma_impl.h>
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int
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_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
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bus_size_t buflen, int flags, bus_dma_segment_t *segs, int *segp)
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{
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panic("busdma");
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}
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int
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_bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map, struct vm_page **ma,
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bus_size_t tlen, int ma_offs, int flags, bus_dma_segment_t *segs,
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int *segp)
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{
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panic("busdma");
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}
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int
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_bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
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bus_size_t buflen, pmap_t pmap, int flags, bus_dma_segment_t *segs,
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int *segp)
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{
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panic("busdma");
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}
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/*
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* Convenience function for manipulating driver locks from busdma (during
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* busdma_swi, for example). Drivers that don't provide their own locks
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* should specify &Giant to dmat->lockfuncarg. Drivers that use their own
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* non-mutex locking scheme don't have to use this at all.
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*/
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void
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_bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
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struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg)
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busdma_lock_mutex(void *arg, bus_dma_lock_op_t op)
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{
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struct mtx *dmtx;
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panic("busdma");
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}
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bus_dma_segment_t *
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_bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
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bus_dma_segment_t *segs, int nsegs, int error)
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{
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panic("busdma");
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dmtx = (struct mtx *)arg;
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switch (op) {
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case BUS_DMA_LOCK:
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mtx_lock(dmtx);
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break;
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case BUS_DMA_UNLOCK:
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mtx_unlock(dmtx);
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break;
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default:
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panic("Unknown operation 0x%x for busdma_lock_mutex!", op);
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}
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}
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/*
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* Release the mapping held by map.
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* dflt_lock should never get called. It gets put into the dma tag when
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* lockfunc == NULL, which is only valid if the maps that are associated
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* with the tag are meant to never be defered.
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* XXX Should have a way to identify which driver is responsible here.
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*/
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void
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bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
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bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op)
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{
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panic("busdma");
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panic("driver error: busdma dflt_lock called");
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}
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void
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bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
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/*
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* Return true if a match is made.
|
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*
|
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* To find a match walk the chain of bus_dma_tag_t's looking for 'paddr'.
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||||
*
|
||||
* If paddr is within the bounds of the dma tag then call the filter callback
|
||||
* to check for a match, if there is no filter callback then assume a match.
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||||
*/
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int
|
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bus_dma_run_filter(struct bus_dma_tag_common *tc, bus_addr_t paddr)
|
||||
{
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int retval;
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retval = 0;
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do {
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if (((paddr > tc->lowaddr && paddr <= tc->highaddr) ||
|
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((paddr & (tc->alignment - 1)) != 0)) &&
|
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(tc->filter == NULL ||
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(*tc->filter)(tc->filterarg, paddr) != 0))
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retval = 1;
|
||||
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tc = tc->parent;
|
||||
} while (retval == 0 && tc != NULL);
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return (retval);
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}
|
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|
||||
int
|
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common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
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bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
|
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bus_addr_t highaddr, bus_dma_filter_t *filter, void *filterarg,
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bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, int flags,
|
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bus_dma_lock_t *lockfunc, void *lockfuncarg, size_t sz, void **dmat)
|
||||
{
|
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void *newtag;
|
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struct bus_dma_tag_common *common;
|
||||
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||||
KASSERT(sz >= sizeof(struct bus_dma_tag_common), ("sz"));
|
||||
/* Return a NULL tag on failure */
|
||||
*dmat = NULL;
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||||
/* Basic sanity checking */
|
||||
if (boundary != 0 && boundary < maxsegsz)
|
||||
maxsegsz = boundary;
|
||||
if (maxsegsz == 0)
|
||||
return (EINVAL);
|
||||
|
||||
newtag = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT);
|
||||
if (newtag == NULL) {
|
||||
CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d",
|
||||
__func__, newtag, 0, ENOMEM);
|
||||
return (ENOMEM);
|
||||
}
|
||||
|
||||
common = newtag;
|
||||
common->impl = &bus_dma_bounce_impl;
|
||||
common->parent = parent;
|
||||
common->alignment = alignment;
|
||||
common->boundary = boundary;
|
||||
common->lowaddr = trunc_page((vm_paddr_t)lowaddr) + (PAGE_SIZE - 1);
|
||||
common->highaddr = trunc_page((vm_paddr_t)highaddr) + (PAGE_SIZE - 1);
|
||||
common->filter = filter;
|
||||
common->filterarg = filterarg;
|
||||
common->maxsize = maxsize;
|
||||
common->nsegments = nsegments;
|
||||
common->maxsegsz = maxsegsz;
|
||||
common->flags = flags;
|
||||
common->ref_count = 1; /* Count ourself */
|
||||
if (lockfunc != NULL) {
|
||||
common->lockfunc = lockfunc;
|
||||
common->lockfuncarg = lockfuncarg;
|
||||
} else {
|
||||
common->lockfunc = bus_dma_dflt_lock;
|
||||
common->lockfuncarg = NULL;
|
||||
}
|
||||
|
||||
/* Take into account any restrictions imposed by our parent tag */
|
||||
if (parent != NULL) {
|
||||
common->impl = parent->impl;
|
||||
common->lowaddr = MIN(parent->lowaddr, common->lowaddr);
|
||||
common->highaddr = MAX(parent->highaddr, common->highaddr);
|
||||
if (common->boundary == 0)
|
||||
common->boundary = parent->boundary;
|
||||
else if (parent->boundary != 0) {
|
||||
common->boundary = MIN(parent->boundary,
|
||||
common->boundary);
|
||||
}
|
||||
if (common->filter == NULL) {
|
||||
/*
|
||||
* Short circuit looking at our parent directly
|
||||
* since we have encapsulated all of its information
|
||||
*/
|
||||
common->filter = parent->filter;
|
||||
common->filterarg = parent->filterarg;
|
||||
common->parent = parent->parent;
|
||||
}
|
||||
atomic_add_int(&parent->ref_count, 1);
|
||||
}
|
||||
*dmat = common;
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Allocate a device specific dma_tag.
|
||||
*/
|
||||
int
|
||||
bus_dma_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)
|
||||
{
|
||||
struct bus_dma_tag_common *tc;
|
||||
int error;
|
||||
|
||||
if (parent == NULL) {
|
||||
error = bus_dma_bounce_impl.tag_create(parent, alignment,
|
||||
boundary, lowaddr, highaddr, filter, filterarg, maxsize,
|
||||
nsegments, maxsegsz, flags, lockfunc, lockfuncarg, dmat);
|
||||
} else {
|
||||
tc = (struct bus_dma_tag_common *)parent;
|
||||
error = tc->impl->tag_create(parent, alignment,
|
||||
boundary, lowaddr, highaddr, filter, filterarg, maxsize,
|
||||
nsegments, maxsegsz, flags, lockfunc, lockfuncarg, dmat);
|
||||
}
|
||||
return (error);
|
||||
}
|
||||
|
||||
int
|
||||
bus_dma_tag_destroy(bus_dma_tag_t dmat)
|
||||
{
|
||||
struct bus_dma_tag_common *tc;
|
||||
|
||||
tc = (struct bus_dma_tag_common *)dmat;
|
||||
return (tc->impl->tag_destroy(dmat));
|
||||
}
|
||||
|
||||
int
|
||||
bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain)
|
||||
{
|
||||
|
||||
panic("busdma");
|
||||
return (0);
|
||||
}
|
||||
|
@ -732,6 +732,10 @@ cache_setup(void)
|
||||
{
|
||||
|
||||
/* TODO */
|
||||
|
||||
dcache_line_size = 0;
|
||||
icache_line_size = 0;
|
||||
idcache_line_size = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
Loading…
Reference in New Issue
Block a user