1 /* $NetBSD: sivar.h,v 1.6 1997/10/17 03:33:47 gwr Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass, David Jones, and Gordon W. Ross. 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 /* 40 * This file defines the interface between si.c and 41 * the bus-specific files: si_obio.c, si_vme.c 42 */ 43 44 /* 45 * Transfers smaller than this are done using PIO 46 * (on assumption they're not worth DMA overhead) 47 */ 48 #define MIN_DMA_LEN 128 49 50 /* 51 * Transfers lager than 65535 bytes need to be split-up. 52 * (Some of the FIFO logic has only 16 bits counters.) 53 * Make the size an integer multiple of the page size 54 * to avoid buf/cluster remap problems. (paranoid?) 55 */ 56 #define MAX_DMA_LEN 0xE000 57 58 /* 59 * This structure is used to keep track of mapped DMA requests. 60 */ 61 struct si_dma_handle { 62 int dh_flags; 63 #define SIDH_BUSY 1 /* This DH is in use */ 64 #define SIDH_OUT 2 /* DMA does data out (write) */ 65 u_char * dh_addr; /* KVA of start of buffer */ 66 int dh_maplen; /* Length of KVA mapping. */ 67 void * dh_dvma; /* VA of buffer in DVMA space */ 68 }; 69 70 /* 71 * The first structure member has to be the ncr5380_softc 72 * so we can just cast to go back and fourth between them. 73 */ 74 struct si_softc { 75 struct ncr5380_softc ncr_sc; 76 volatile struct si_regs *sc_regs; 77 int sc_adapter_type; 78 int sc_adapter_iv_am; /* int. vec + address modifier */ 79 int sc_options; /* options for this instance */ 80 int sc_reqlen; /* requested transfer length */ 81 struct si_dma_handle *sc_dma; 82 /* DMA command block for the OBIO controller. */ 83 void *sc_dmacmd; 84 }; 85 86 /* Options for disconnect/reselect, DMA, and interrupts. */ 87 #define SI_NO_DISCONNECT 0xff 88 #define SI_NO_PARITY_CHK 0xff00 89 #define SI_FORCE_POLLING 0x10000 90 #define SI_DISABLE_DMA 0x20000 91 /* The options are taken from the config file (PR#1929) */ 92 93 extern int si_debug; 94 95 void si_attach __P((struct si_softc *)); 96 int si_intr __P((void *)); 97 98 void si_dma_alloc __P((struct ncr5380_softc *)); 99 void si_dma_free __P((struct ncr5380_softc *)); 100 void si_dma_poll __P((struct ncr5380_softc *)); 101