1 /* $NetBSD: if_ie_sebuf.c,v 1.17 2024/12/20 23:52:00 tsutsui 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 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Machine-dependent glue for the Intel Ethernet (ie) driver, 34 * as found on the Sun3/E SCSI/Ethernet board. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: if_ie_sebuf.c,v 1.17 2024/12/20 23:52:00 tsutsui Exp $"); 39 40 #include "opt_inet.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/protosw.h> 46 #include <sys/socket.h> 47 #include <net/if.h> 48 #include <net/if_ether.h> 49 50 #ifdef INET 51 #include <netinet/in.h> 52 #include <netinet/in_systm.h> 53 #include <netinet/in_var.h> 54 #include <netinet/ip.h> 55 #include <netinet/if_inarp.h> 56 #endif 57 58 #include <machine/autoconf.h> 59 #include <machine/cpu.h> 60 #include <machine/dvma.h> 61 #include <machine/idprom.h> 62 #include <machine/vmparam.h> 63 64 #include "i82586.h" 65 #include "if_iereg.h" 66 #include "if_ievar.h" 67 #include "sereg.h" 68 #include "sevar.h" 69 70 static void ie_sebuf_reset(struct ie_softc *); 71 static void ie_sebuf_attend(struct ie_softc *); 72 static void ie_sebuf_run(struct ie_softc *); 73 74 /* 75 * zero/copy functions: OBIO can use the normal functions, but VME 76 * must do only byte or half-word (16 bit) accesses... 77 */ 78 static void *wmemcpy(void *, const void *, size_t); 79 static void *wmemset(void *, int, size_t); 80 81 82 /* 83 * New-style autoconfig attachment 84 */ 85 86 static int ie_sebuf_match(device_t, cfdata_t, void *); 87 static void ie_sebuf_attach(device_t, device_t, void *); 88 89 CFATTACH_DECL_NEW(ie_sebuf, sizeof(struct ie_softc), 90 ie_sebuf_match, ie_sebuf_attach, NULL, NULL); 91 92 static int 93 ie_sebuf_match(device_t parent, cfdata_t cf, void *args) 94 { 95 struct sebuf_attach_args *aa = args; 96 97 /* Match by name. */ 98 if (strcmp(aa->name, "ie")) 99 return 0; 100 101 /* Anyting else to check? */ 102 103 return 1; 104 } 105 106 static void 107 ie_sebuf_attach(device_t parent, device_t self, void *args) 108 { 109 struct ie_softc *sc = device_private(self); 110 struct sebuf_attach_args *aa = args; 111 volatile struct ie_regs *regs; 112 int off; 113 114 sc->sc_dev = self; 115 sc->hard_type = IE_VME3E; 116 sc->reset_586 = ie_sebuf_reset; 117 sc->chan_attn = ie_sebuf_attend; 118 sc->run_586 = ie_sebuf_run; 119 sc->sc_memcpy = wmemcpy; 120 sc->sc_memset = wmemset; 121 122 /* Control regs mapped by parent. */ 123 sc->sc_reg = aa->regs; 124 regs = (struct ie_regs *)sc->sc_reg; 125 126 /* 127 * On this hardware, the i82586 address zero 128 * maps to the start of the board, which we 129 * happen to know is 128K below (XXX). 130 */ 131 sc->sc_iobase = aa->buf - 0x20000; 132 133 /* 134 * There is 128K of memory for the i82586 on 135 * the Sun3/E SCSI/Ethernet board, and the 136 * "sebuf" driver has mapped it in for us. 137 * (Fixed in hardware; NOT configurable!) 138 */ 139 if (aa->blen < SE_IEBUFSIZE) 140 panic("ie_sebuf: bad size"); 141 sc->sc_msize = SE_IEBUFSIZE; 142 sc->sc_maddr = aa->buf; 143 144 /* Clear the memory. */ 145 (sc->sc_memset)(sc->sc_maddr, 0, sc->sc_msize); 146 147 /* 148 * XXX: Unfortunately, the common driver code 149 * is not ready to deal with more than 64K of 150 * memory, so skip the first 64K. Too bad. 151 * Note: device needs the SCP at the end. 152 */ 153 sc->sc_msize -= 0x10000; 154 sc->sc_maddr = (char *)sc->sc_maddr + 0x10000; 155 156 /* 157 * Set the System Configuration Pointer (SCP). 158 * Its location is system-dependent because the 159 * i82586 reads it from a fixed physical address. 160 * On this hardware, the i82586 address is just 161 * masked down to 17 bits, so the SCP is found 162 * at the end of the RAM on the VME board. 163 */ 164 off = IE_SCP_ADDR & 0xFFFF; 165 sc->scp = (volatile void *)((char *)sc->sc_maddr + off); 166 167 /* 168 * The rest of ram is used for buffers, etc. 169 */ 170 sc->buf_area = sc->sc_maddr; 171 sc->buf_area_sz = off; 172 173 /* Install interrupt handler. */ 174 regs->ie_ivec = aa->ca.ca_intvec; 175 isr_add_vectored(ie_intr, sc, aa->ca.ca_intpri, aa->ca.ca_intvec); 176 177 /* Set the ethernet address. */ 178 idprom_etheraddr(sc->sc_addr); 179 180 /* Do machine-independent parts of attach. */ 181 ie_attach(sc); 182 183 } 184 185 /* Whack the "channel attetion" line. */ 186 void 187 ie_sebuf_attend(struct ie_softc *sc) 188 { 189 volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg; 190 191 regs->ie_csr |= IE_CSR_ATTEN; /* flag! */ 192 regs->ie_csr &= ~IE_CSR_ATTEN; /* down. */ 193 } 194 195 /* 196 * This is called during driver attach. 197 * Reset and initialize. 198 */ 199 void 200 ie_sebuf_reset(struct ie_softc *sc) 201 { 202 volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg; 203 regs->ie_csr = IE_CSR_RESET; 204 delay(20); 205 regs->ie_csr = (IE_CSR_NOLOOP | IE_CSR_IENAB); 206 } 207 208 /* 209 * This is called at the end of ieinit(). 210 * optional. 211 */ 212 void 213 ie_sebuf_run(struct ie_softc *sc) 214 { 215 216 /* do it all in reset */ 217 } 218 219 /* 220 * wmemcpy/wmemset - like memcpy/memset but largest access is 16-bits, 221 * and also does byte swaps... 222 * XXX - Would be nice to have asm versions in some library... 223 */ 224 225 static void * 226 wmemset(void *vb, int val, size_t l) 227 { 228 uint8_t *b = vb; 229 uint8_t *be = b + l; 230 uint16_t *sp; 231 232 if (l == 0) 233 return vb; 234 235 /* front, */ 236 if ((uint32_t)b & 1) 237 *b++ = val; 238 239 /* back, */ 240 if (b != be && ((uint32_t)be & 1) != 0) { 241 be--; 242 *be = val; 243 } 244 245 /* and middle. */ 246 sp = (uint16_t *)b; 247 while (sp != (uint16_t *)be) 248 *sp++ = val; 249 250 return vb; 251 } 252 253 static void * 254 wmemcpy(void *dst, const void *src, size_t l) 255 { 256 const uint8_t *b1e, *b1 = src; 257 uint8_t *b2 = dst; 258 const uint16_t *sp; 259 int bstore = 0; 260 261 if (l == 0) 262 return dst; 263 264 /* front, */ 265 if ((uint32_t)b1 & 1) { 266 *b2++ = *b1++; 267 l--; 268 } 269 270 /* middle, */ 271 sp = (const uint16_t *)b1; 272 b1e = b1 + l; 273 if (l & 1) 274 b1e--; 275 bstore = (uint32_t)b2 & 1; 276 277 while (sp < (const uint16_t *)b1e) { 278 if (bstore) { 279 b2[1] = *sp & 0xff; 280 b2[0] = *sp >> 8; 281 } else 282 *((uint16_t *)b2) = *sp; 283 sp++; 284 b2 += 2; 285 } 286 287 /* and back. */ 288 if (l & 1) 289 *b2 = *b1e; 290 291 return dst; 292 } 293
Indexes created Sat Sep 20 22:09:52 GMT 2025