1 /* $NetBSD: hpcdma.h,v 1.4 2002/03/13 13:12:27 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wayne Knowles 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _SGIMIPS_HPC_DMA_H 40 #define _SGIMIPS_HPC_DMA_H 41 42 #include <machine/bus.h> 43 44 struct hpc_dma_softc { 45 bus_space_tag_t sc_bst; 46 bus_space_handle_t sc_bsh; 47 bus_dma_tag_t sc_dmat; 48 49 u_int32_t sc_flags; 50 #define HPCDMA_READ 0x20 /* direction of transfer */ 51 #define HPCDMA_LOADED 0x40 /* bus_dmamap loaded */ 52 #define HPCDMA_ACTIVE 0x80 /* DMA engine is busy */ 53 u_int32_t sc_dmacmd; 54 int sc_ndesc; 55 bus_dmamap_t sc_dmamap; 56 struct hpc_dma_desc *sc_desc_kva; /* Virtual address */ 57 struct hpc_dma_desc *sc_desc_pa; /* Physical address */ 58 ssize_t sc_dlen; /* number of bytes transfered */ 59 }; 60 61 62 void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int); 63 void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t); 64 void hpcdma_cntl(struct hpc_dma_softc *, u_int32_t); 65 void hpcdma_reset(struct hpc_dma_softc *); 66 void hpcdma_flush(struct hpc_dma_softc *); 67 68 #endif /* _SGIMIPS_HPC_DMA_H */ 69