1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)if_uba.h 7.4 (Berkeley) 06/28/90 8 */ 9 10 /* 11 * Structure and routine definitions 12 * for UNIBUS network interfaces. 13 */ 14 15 #define IF_MAXNUBAMR 10 16 /* 17 * Each interface has structures giving information 18 * about UNIBUS resources held by the interface 19 * for each send and receive buffer. 20 * 21 * We hold IF_NUBAMR map registers for datagram data, starting 22 * at ifr_mr. Map register ifr_mr[-1] maps the local network header 23 * ending on the page boundary. Bdp's are reserved for read and for 24 * write, given by ifr_bdp. The prototype of the map register for 25 * read and for write is saved in ifr_proto. 26 * 27 * When write transfers are not full pages on page boundaries we just 28 * copy the data into the pages mapped on the UNIBUS and start the 29 * transfer. If a write transfer is of a (1024 byte) page on a page 30 * boundary, we swap in UNIBUS pte's to reference the pages, and then 31 * remap the initial pages (from ifu_wmap) when the transfer completes. 32 * 33 * When read transfers give whole pages of data to be input, we 34 * allocate page frames from a network page list and trade them 35 * with the pages already containing the data, mapping the allocated 36 * pages to replace the input pages for the next UNIBUS data input. 37 */ 38 39 /* 40 * Information per interface. 41 */ 42 struct ifubinfo { 43 short iff_uban; /* uba number */ 44 short iff_hlen; /* local net header length */ 45 struct uba_regs *iff_uba; /* uba adaptor regs, in vm */ 46 struct pte *iff_ubamr; /* uba map regs, in vm */ 47 short iff_flags; /* used during uballoc's */ 48 }; 49 50 /* 51 * Information per buffer. 52 */ 53 struct ifrw { 54 caddr_t ifrw_addr; /* virt addr of header */ 55 short ifrw_bdp; /* unibus bdp */ 56 short ifrw_flags; /* type, etc. */ 57 #define IFRW_W 0x01 /* is a transmit buffer */ 58 int ifrw_info; /* value from ubaalloc */ 59 int ifrw_proto; /* map register prototype */ 60 struct pte *ifrw_mr; /* base of map registers */ 61 }; 62 63 /* 64 * Information per transmit buffer, including the above. 65 */ 66 struct ifxmt { 67 struct ifrw ifrw; 68 caddr_t ifw_base; /* virt addr of buffer */ 69 struct pte ifw_wmap[IF_MAXNUBAMR]; /* base pages for output */ 70 struct mbuf *ifw_xtofree; /* pages being dma'd out */ 71 short ifw_xswapd; /* mask of clusters swapped */ 72 short ifw_nmr; /* number of entries in wmap */ 73 }; 74 #define ifw_addr ifrw.ifrw_addr 75 #define ifw_bdp ifrw.ifrw_bdp 76 #define ifw_flags ifrw.ifrw_flags 77 #define ifw_info ifrw.ifrw_info 78 #define ifw_proto ifrw.ifrw_proto 79 #define ifw_mr ifrw.ifrw_mr 80 81 /* 82 * Most interfaces have a single receive and a single transmit buffer, 83 * and use struct ifuba to store all of the unibus information. 84 */ 85 struct ifuba { 86 struct ifubinfo ifu_info; 87 struct ifrw ifu_r; 88 struct ifxmt ifu_xmt; 89 }; 90 91 #define ifu_uban ifu_info.iff_uban 92 #define ifu_hlen ifu_info.iff_hlen 93 #define ifu_uba ifu_info.iff_uba 94 #define ifu_ubamr ifu_info.iff_ubamr 95 #define ifu_flags ifu_info.iff_flags 96 #define ifu_w ifu_xmt.ifrw 97 #define ifu_xtofree ifu_xmt.ifw_xtofree 98 99 #ifdef KERNEL 100 #define if_ubainit(ifuba, uban, hlen, nmr) \ 101 if_ubaminit(&(ifuba)->ifu_info, uban, hlen, nmr, \ 102 &(ifuba)->ifu_r, 1, &(ifuba)->ifu_xmt, 1) 103 #define if_rubaget(ifu, totlen, off0, ifp) \ 104 if_ubaget(&(ifu)->ifu_info, &(ifu)->ifu_r, totlen, off0, ifp) 105 #define if_wubaput(ifu, m) \ 106 if_ubaput(&(ifu)->ifu_info, &(ifu)->ifu_xmt, m) 107 struct mbuf *if_ubaget(); 108 #endif 109