1 /* $NetBSD: if_uba.h,v 1.15 2007/03/04 06:02:29 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)if_uba.h 7.4 (Berkeley) 6/28/90 32 */ 33 34 /* 35 * Structure and routine definitions 36 * for UNIBUS network interfaces. 37 */ 38 39 /* 40 * Each interface has structures giving information 41 * about UNIBUS resources held by the interface 42 * for each send and receive buffer. 43 * 44 * We hold IF_NUBAMR map registers for datagram data, starting 45 * at ifr_mr. Map register ifr_mr[-1] maps the local network header 46 * ending on the page boundary. Bdp's are reserved for read and for 47 * write, given by ifr_bdp. The prototype of the map register for 48 * read and for write is saved in ifr_proto. 49 * 50 * When write transfers are not full pages on page boundaries we just 51 * copy the data into the pages mapped on the UNIBUS and start the 52 * transfer. If a write transfer is of a (1024 byte) page on a page 53 * boundary, we swap in UNIBUS pte's to reference the pages, and then 54 * remap the initial pages (from ifu_wmap) when the transfer completes. 55 * 56 * When read transfers give whole pages of data to be input, we 57 * allocate page frames from a network page list and trade them 58 * with the pages already containing the data, mapping the allocated 59 * pages to replace the input pages for the next UNIBUS data input. 60 */ 61 62 /* 63 * Information per interface. 64 */ 65 struct ifubinfo { 66 struct uba_softc *iff_softc; /* uba */ 67 }; 68 69 /* 70 * Information per buffer. 71 */ 72 struct ifrw { 73 short ifrw_bdp; /* unibus bdp */ 74 short ifrw_flags; /* type, etc. */ 75 #define IFRW_MBUF 0x01 /* uses DMA from mbuf */ 76 bus_dmamap_t ifrw_map; /* DMA map */ 77 struct mbuf *ifrw_mbuf; 78 }; 79 80 /* 81 * Information per transmit buffer, including the above. 82 */ 83 struct ifxmt { 84 struct ifrw ifrw; 85 void * ifw_vaddr; /* DMA memory virtual addr */ 86 int ifw_size; /* Size of this DMA block */ 87 }; 88 #define ifrw_addr ifrw_mbuf->m_data 89 #define ifrw_info ifrw_map->dm_segs[0].ds_addr 90 #define ifw_addr ifrw.ifrw_addr 91 #define ifw_bdp ifrw.ifrw_bdp 92 #define ifw_flags ifrw.ifrw_flags 93 #define ifw_info ifrw.ifrw_info 94 #define ifw_proto ifrw.ifrw_proto 95 #define ifw_mr ifrw.ifrw_mr 96 #define ifw_map ifrw.ifrw_map 97 #define ifw_mbuf ifrw.ifrw_mbuf 98 99 /* 100 * Most interfaces have a single receive and a single transmit buffer, 101 * and use struct ifuba to store all of the unibus information. 102 */ 103 struct ifuba { 104 struct ifubinfo ifu_info; 105 struct ifrw ifu_r; 106 struct ifxmt ifu_xmt; 107 }; 108 109 #define ifu_softc ifu_info.iff_softc 110 #define ifu_hlen ifu_info.iff_hlen 111 #define ifu_uba ifu_info.iff_uba 112 #define ifu_ubamr ifu_info.iff_ubamr 113 #define ifu_flags ifu_info.iff_flags 114 #define ifu_w ifu_xmt.ifrw 115 #define ifu_xtofree ifu_xmt.ifw_xtofree 116 117 #ifdef _KERNEL 118 #define if_ubainit(ifuba, uban, size) \ 119 if_ubaminit(&(ifuba)->ifu_info, uban, size, \ 120 &(ifuba)->ifu_r, 1, &(ifuba)->ifu_xmt, 1) 121 #define if_rubaget(ifu, ifp, len) \ 122 if_ubaget(&(ifu)->ifu_info, &(ifu)->ifu_r, ifp, len) 123 #define if_wubaput(ifu, m) \ 124 if_ubaput(&(ifu)->ifu_info, &(ifu)->ifu_xmt, m) 125 #define if_wubaend(ifu) \ 126 if_ubaend(&(ifu)->ifu_info, &(ifu)->ifu_xmt) 127 128 /* Prototypes */ 129 int if_ubaminit(struct ifubinfo *, struct uba_softc *, int, 130 struct ifrw *, int, struct ifxmt *, int); 131 int if_ubaput(struct ifubinfo *, struct ifxmt *, struct mbuf *); 132 struct mbuf *if_ubaget(struct ifubinfo *, struct ifrw *, struct ifnet *, int); 133 void if_ubaend(struct ifubinfo *ifu, struct ifxmt *); 134 #endif 135