Annotation of sys/arch/vax/if/if_uba.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_uba.h,v 1.7 2003/11/10 21:05:04 miod Exp $ */
! 2: /* $NetBSD: if_uba.h,v 1.6 1996/08/20 14:07:50 ragge Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986 Regents of the University of California.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)if_uba.h 7.4 (Berkeley) 6/28/90
! 33: */
! 34:
! 35: /*
! 36: * Structure and routine definitions
! 37: * for UNIBUS network interfaces.
! 38: */
! 39:
! 40: #define IF_MAXNUBAMR 10
! 41: /*
! 42: * Each interface has structures giving information
! 43: * about UNIBUS resources held by the interface
! 44: * for each send and receive buffer.
! 45: *
! 46: * We hold IF_NUBAMR map registers for datagram data, starting
! 47: * at ifr_mr. Map register ifr_mr[-1] maps the local network header
! 48: * ending on the page boundary. Bdp's are reserved for read and for
! 49: * write, given by ifr_bdp. The prototype of the map register for
! 50: * read and for write is saved in ifr_proto.
! 51: *
! 52: * When write transfers are not full pages on page boundaries we just
! 53: * copy the data into the pages mapped on the UNIBUS and start the
! 54: * transfer. If a write transfer is of a (1024 byte) page on a page
! 55: * boundary, we swap in UNIBUS pte's to reference the pages, and then
! 56: * remap the initial pages (from ifu_wmap) when the transfer completes.
! 57: *
! 58: * When read transfers give whole pages of data to be input, we
! 59: * allocate page frames from a network page list and trade them
! 60: * with the pages already containing the data, mapping the allocated
! 61: * pages to replace the input pages for the next UNIBUS data input.
! 62: */
! 63:
! 64: /*
! 65: * Information per interface.
! 66: */
! 67: struct ifubinfo {
! 68: short iff_flags; /* used during uballoc's */
! 69: short iff_hlen; /* local net header length */
! 70: struct uba_regs *iff_uba; /* uba adaptor regs, in vm */
! 71: pt_entry_t *iff_ubamr; /* uba map regs, in vm */
! 72: struct uba_softc *iff_softc; /* uba */
! 73: };
! 74:
! 75: /*
! 76: * Information per buffer.
! 77: */
! 78: struct ifrw {
! 79: caddr_t ifrw_addr; /* virt addr of header */
! 80: short ifrw_bdp; /* unibus bdp */
! 81: short ifrw_flags; /* type, etc. */
! 82: #define IFRW_W 0x01 /* is a transmit buffer */
! 83: int ifrw_info; /* value from ubaalloc */
! 84: int ifrw_proto; /* map register prototype */
! 85: pt_entry_t *ifrw_mr; /* base of map registers */
! 86: };
! 87:
! 88: /*
! 89: * Information per transmit buffer, including the above.
! 90: */
! 91: struct ifxmt {
! 92: struct ifrw ifrw;
! 93: caddr_t ifw_base; /* virt addr of buffer */
! 94: pt_entry_t ifw_wmap[IF_MAXNUBAMR]; /* base pages for output */
! 95: struct mbuf *ifw_xtofree; /* pages being dma'd out */
! 96: short ifw_xswapd; /* mask of clusters swapped */
! 97: short ifw_nmr; /* number of entries in wmap */
! 98: };
! 99: #define ifw_addr ifrw.ifrw_addr
! 100: #define ifw_bdp ifrw.ifrw_bdp
! 101: #define ifw_flags ifrw.ifrw_flags
! 102: #define ifw_info ifrw.ifrw_info
! 103: #define ifw_proto ifrw.ifrw_proto
! 104: #define ifw_mr ifrw.ifrw_mr
! 105:
! 106: /*
! 107: * Most interfaces have a single receive and a single transmit buffer,
! 108: * and use struct ifuba to store all of the unibus information.
! 109: */
! 110: struct ifuba {
! 111: struct ifubinfo ifu_info;
! 112: struct ifrw ifu_r;
! 113: struct ifxmt ifu_xmt;
! 114: };
! 115:
! 116: #define ifu_softc ifu_info.iff_softc
! 117: #define ifu_hlen ifu_info.iff_hlen
! 118: #define ifu_uba ifu_info.iff_uba
! 119: #define ifu_ubamr ifu_info.iff_ubamr
! 120: #define ifu_flags ifu_info.iff_flags
! 121: #define ifu_w ifu_xmt.ifrw
! 122: #define ifu_xtofree ifu_xmt.ifw_xtofree
! 123:
! 124: #ifdef _KERNEL
! 125: #define if_ubainit(ifuba, uban, hlen, nmr) \
! 126: if_ubaminit(&(ifuba)->ifu_info, uban, hlen, nmr, \
! 127: &(ifuba)->ifu_r, 1, &(ifuba)->ifu_xmt, 1)
! 128: #define if_rubaget(ifu, totlen, off0, ifp) \
! 129: if_ubaget(&(ifu)->ifu_info, &(ifu)->ifu_r, totlen, off0, ifp)
! 130: #define if_wubaput(ifu, m) \
! 131: if_ubaput(&(ifu)->ifu_info, &(ifu)->ifu_xmt, m)
! 132:
! 133: /* Prototypes */
! 134: int if_ubaminit(struct ifubinfo *, struct uba_softc *, int, int,
! 135: struct ifrw *, int, struct ifxmt *, int);
! 136: int if_ubaput(struct ifubinfo *, struct ifxmt *, struct mbuf *);
! 137: struct mbuf *if_ubaget(struct ifubinfo *, struct ifrw *, int,
! 138: struct ifnet *);
! 139:
! 140: #endif
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