diff options
Diffstat (limited to 'sys/dev/firewire/fwdma.h')
| -rw-r--r-- | sys/dev/firewire/fwdma.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sys/dev/firewire/fwdma.h b/sys/dev/firewire/fwdma.h new file mode 100644 index 0000000..6bf66c7 --- /dev/null +++ b/sys/dev/firewire/fwdma.h @@ -0,0 +1,112 @@ +/* + * Copyright (C) 2003 + * Hidetoshi Shimokawa. 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * + * This product includes software developed by Hidetoshi Shimokawa. + * + * 4. Neither the name of the author nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + * + * $FreeBSD$ + */ + +struct fwdma_alloc { + bus_dma_tag_t dma_tag; + bus_dmamap_t dma_map; + void * v_addr; + bus_addr_t bus_addr; +}; + +struct fwdma_seg { + bus_dmamap_t dma_map; + void * v_addr; + bus_addr_t bus_addr; +}; + +struct fwdma_alloc_multi { + bus_size_t ssize; + bus_size_t esize; + int nseg; + bus_dma_tag_t dma_tag; + struct fwdma_seg seg[0]; +}; + +static __inline void * +fwdma_v_addr(struct fwdma_alloc_multi *am, int index) +{ + bus_size_t ssize = am->ssize; + int offset = am->esize * index; + + return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize)); +} + +static __inline bus_addr_t +fwdma_bus_addr(struct fwdma_alloc_multi *am, int index) +{ + bus_size_t ssize = am->ssize; + int offset = am->esize * index; + + return (am->seg[offset / ssize].bus_addr + (offset % ssize)); +} + +static __inline void +fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op) +{ + bus_dmamap_sync(dma->dma_tag, dma->dma_map, op); +} + +static __inline void +fwdma_sync_multiseg(struct fwdma_alloc_multi *am, + int start, int end, bus_dmasync_op_t op) +{ + struct fwdma_seg *seg, *eseg; + + seg = &am->seg[am->esize * start / am->ssize]; + eseg = &am->seg[am->esize * end / am->ssize]; + for (; seg <= eseg; seg ++) + bus_dmamap_sync(am->dma_tag, seg->dma_map, op); +} + +static __inline void +fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op) +{ + struct fwdma_seg *seg; + int i; + + seg = &am->seg[0]; + for (i = 0; i < am->nseg; i++, seg++) + bus_dmamap_sync(am->dma_tag, seg->dma_map, op); +} + +void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int); +void fwdma_free(struct firewire_comm *, struct fwdma_alloc *); +void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int); +void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t); +struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, + int, int, int, int); +void fwdma_free_multiseg(struct fwdma_alloc_multi *); + |
