1 /* $NetBSD: qec.c,v 1.55 2022/09/25 18:03:04 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: qec.c,v 1.55 2022/09/25 18:03:04 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/errno.h> 39 #include <sys/device.h> 40 41 #include <sys/bus.h> 42 #include <sys/intr.h> 43 #include <machine/autoconf.h> 44 45 #include <dev/sbus/sbusvar.h> 46 #include <dev/sbus/qecreg.h> 47 #include <dev/sbus/qecvar.h> 48 49 static int qecprint(void *, const char *); 50 static int qecmatch(device_t, cfdata_t, void *); 51 static void qecattach(device_t, device_t, void *); 52 void qec_init(struct qec_softc *); 53 54 static int qec_bus_map( 55 bus_space_tag_t, 56 bus_addr_t, /*coded slot+offset*/ 57 bus_size_t, /*size*/ 58 int, /*flags*/ 59 vaddr_t, /*preferred virtual address */ 60 bus_space_handle_t *); 61 static void *qec_intr_establish( 62 bus_space_tag_t, 63 int, /*bus interrupt priority*/ 64 int, /*`device class' interrupt level*/ 65 int (*)(void *), /*handler*/ 66 void *, /*arg*/ 67 void (*)(void)); /*optional fast trap handler*/ 68 69 CFATTACH_DECL_NEW(qec, sizeof(struct qec_softc), 70 qecmatch, qecattach, NULL, NULL); 71 72 int 73 qecprint(void *aux, const char *busname) 74 { 75 struct sbus_attach_args *sa = aux; 76 bus_space_tag_t t = sa->sa_bustag; 77 struct qec_softc *sc = t->cookie; 78 79 sa->sa_bustag = sc->sc_bustag; /* XXX */ 80 sbus_print(aux, busname); /* XXX */ 81 sa->sa_bustag = t; /* XXX */ 82 return (UNCONF); 83 } 84 85 int 86 qecmatch(device_t parent, cfdata_t cf, void *aux) 87 { 88 struct sbus_attach_args *sa = aux; 89 90 return (strcmp(cf->cf_name, sa->sa_name) == 0); 91 } 92 93 /* 94 * Attach all the sub-devices we can find 95 */ 96 void 97 qecattach(device_t parent, device_t self, void *aux) 98 { 99 struct sbus_attach_args *sa = aux; 100 struct qec_softc *sc = device_private(self); 101 struct sbus_softc *sbsc = device_private(parent); 102 int node; 103 int sbusburst; 104 bus_space_tag_t sbt; 105 bus_space_handle_t bh; 106 int error; 107 108 sc->sc_dev = self; 109 sc->sc_bustag = sa->sa_bustag; 110 sc->sc_dmatag = sa->sa_dmatag; 111 node = sa->sa_node; 112 113 if (sa->sa_nreg < 2) { 114 printf("%s: only %d register sets\n", 115 device_xname(self), sa->sa_nreg); 116 return; 117 } 118 119 if (sbus_bus_map(sa->sa_bustag, 120 sa->sa_reg[0].oa_space, 121 sa->sa_reg[0].oa_base, 122 sa->sa_reg[0].oa_size, 123 0, &sc->sc_regs) != 0) { 124 aprint_error_dev(self, "attach: cannot map registers\n"); 125 return; 126 } 127 128 /* 129 * This device's "register space 1" is just a buffer where the 130 * Lance ring-buffers can be stored. Note the buffer's location 131 * and size, so the child driver can pick them up. 132 */ 133 if (sbus_bus_map(sa->sa_bustag, 134 sa->sa_reg[1].oa_space, 135 sa->sa_reg[1].oa_base, 136 sa->sa_reg[1].oa_size, 137 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 138 aprint_error_dev(self, "attach: cannot map registers\n"); 139 return; 140 } 141 sc->sc_buffer = (void *)bus_space_vaddr(sa->sa_bustag, bh); 142 sc->sc_bufsiz = (bus_size_t)sa->sa_reg[1].oa_size; 143 144 /* Get number of on-board channels */ 145 sc->sc_nchannels = prom_getpropint(node, "#channels", -1); 146 if (sc->sc_nchannels == -1) { 147 printf(": no channels\n"); 148 return; 149 } 150 151 /* 152 * Get transfer burst size from PROM 153 */ 154 sbusburst = sbsc->sc_burst; 155 if (sbusburst == 0) 156 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */ 157 158 sc->sc_burst = prom_getpropint(node, "burst-sizes", -1); 159 if (sc->sc_burst == -1) 160 /* take SBus burst sizes */ 161 sc->sc_burst = sbusburst; 162 163 /* Clamp at parent's burst sizes */ 164 sc->sc_burst &= sbusburst; 165 166 /* Allocate a bus tag */ 167 sbt = bus_space_tag_alloc(sc->sc_bustag, sc); 168 if (sbt == NULL) { 169 aprint_error_dev(self, "attach: out of memory\n"); 170 return; 171 } 172 173 sbt->sparc_bus_map = qec_bus_map; 174 sbt->sparc_intr_establish = qec_intr_establish; 175 176 /* 177 * Collect address translations from the OBP. 178 */ 179 error = prom_getprop(node, "ranges", sizeof(struct openprom_range), 180 &sbt->nranges, &sbt->ranges); 181 switch (error) { 182 case 0: 183 break; 184 case ENOENT: 185 default: 186 panic("%s: error getting ranges property", device_xname(self)); 187 } 188 189 /* 190 * Save interrupt information for use in our qec_intr_establish() 191 * function below. Apparently, the intr level for the quad 192 * ethernet board (qe) is stored in the QEC node rather than 193 * separately in each of the QE nodes. 194 * 195 * XXX - qe.c should call bus_intr_establish() with `level = 0'.. 196 * XXX - maybe we should have our own attach args for all that. 197 */ 198 sc->sc_intr = sa->sa_intr; 199 200 printf(": %dK memory\n", sc->sc_bufsiz / 1024); 201 202 qec_init(sc); 203 204 /* search through children */ 205 devhandle_t selfh = device_handle(self); 206 for (node = firstchild(node); node; node = nextsibling(node)) { 207 struct sbus_attach_args sax; 208 sbus_setup_attach_args(sbsc, 209 sbt, sc->sc_dmatag, node, &sax); 210 (void)config_found(self, (void *)&sax, qecprint, 211 CFARGS(.devhandle = prom_node_to_devhandle(selfh, node))); 212 sbus_destroy_attach_args(&sax); 213 } 214 } 215 216 int 217 qec_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 218 vaddr_t va, bus_space_handle_t *hp) 219 /* va: Ignored */ 220 { 221 int error; 222 223 if ((error = bus_space_translate_address_generic( 224 t->ranges, t->nranges, &ba)) != 0) 225 return (error); 226 227 return (bus_space_map(t->parent, ba, size, flags, hp)); 228 } 229 230 void * 231 qec_intr_establish(bus_space_tag_t t, int pri, int level, 232 int (*handler)(void *), void *arg, void (*fastvec)(void)) 233 /* (*fastvec)(void): ignored */ 234 { 235 struct qec_softc *sc = t->cookie; 236 237 if (pri == 0) { 238 /* 239 * qe.c calls bus_intr_establish() with `pri == 0' 240 * XXX - see also comment in qec_attach(). 241 */ 242 if (sc->sc_intr == NULL) { 243 printf("%s: warning: no interrupts\n", 244 device_xname(sc->sc_dev)); 245 return (NULL); 246 } 247 pri = sc->sc_intr->oi_pri; 248 } 249 250 return (bus_intr_establish(t->parent, pri, level, handler, arg)); 251 } 252 253 void 254 qec_init(struct qec_softc *sc) 255 { 256 bus_space_tag_t t = sc->sc_bustag; 257 bus_space_handle_t qr = sc->sc_regs; 258 uint32_t v, burst = 0, psize; 259 int i; 260 261 /* First, reset the controller */ 262 bus_space_write_4(t, qr, QEC_QRI_CTRL, QEC_CTRL_RESET); 263 for (i = 0; i < 1000; i++) { 264 DELAY(100); 265 v = bus_space_read_4(t, qr, QEC_QRI_CTRL); 266 if ((v & QEC_CTRL_RESET) == 0) 267 break; 268 } 269 270 /* 271 * Cut available buffer size into receive and transmit buffers. 272 * XXX - should probably be done in be & qe driver... 273 */ 274 v = sc->sc_msize = sc->sc_bufsiz / sc->sc_nchannels; 275 bus_space_write_4(t, qr, QEC_QRI_MSIZE, v); 276 277 v = sc->sc_rsize = sc->sc_bufsiz / (sc->sc_nchannels * 2); 278 bus_space_write_4(t, qr, QEC_QRI_RSIZE, v); 279 bus_space_write_4(t, qr, QEC_QRI_TSIZE, v); 280 281 psize = sc->sc_nchannels == 1 ? QEC_PSIZE_2048 : 0; 282 bus_space_write_4(t, qr, QEC_QRI_PSIZE, psize); 283 284 if (sc->sc_burst & SBUS_BURST_64) 285 burst = QEC_CTRL_B64; 286 else if (sc->sc_burst & SBUS_BURST_32) 287 burst = QEC_CTRL_B32; 288 else 289 burst = QEC_CTRL_B16; 290 291 v = bus_space_read_4(t, qr, QEC_QRI_CTRL); 292 v = (v & QEC_CTRL_MODEMASK) | burst; 293 bus_space_write_4(t, qr, QEC_QRI_CTRL, v); 294 } 295 296 /* 297 * Common routine to initialize the QEC packet ring buffer. 298 * Called from be & qe drivers. 299 */ 300 void 301 qec_meminit(struct qec_ring *qr, unsigned int pktbufsz) 302 { 303 bus_addr_t txbufdma, rxbufdma; 304 bus_addr_t dma; 305 uint8_t *p; 306 unsigned int ntbuf, nrbuf, i; 307 308 p = qr->rb_membase; 309 dma = qr->rb_dmabase; 310 311 ntbuf = qr->rb_ntbuf; 312 nrbuf = qr->rb_nrbuf; 313 314 /* 315 * Allocate transmit descriptors 316 */ 317 qr->rb_txd = (struct qec_xd *)p; 318 qr->rb_txddma = dma; 319 p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd); 320 dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd); 321 322 /* 323 * Allocate receive descriptors 324 */ 325 qr->rb_rxd = (struct qec_xd *)p; 326 qr->rb_rxddma = dma; 327 p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd); 328 dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd); 329 330 331 /* 332 * Allocate transmit buffers 333 */ 334 qr->rb_txbuf = p; 335 txbufdma = dma; 336 p += ntbuf * pktbufsz; 337 dma += ntbuf * pktbufsz; 338 339 /* 340 * Allocate receive buffers 341 */ 342 qr->rb_rxbuf = p; 343 rxbufdma = dma; 344 p += nrbuf * pktbufsz; 345 dma += nrbuf * pktbufsz; 346 347 /* 348 * Initialize transmit buffer descriptors 349 */ 350 for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) { 351 qr->rb_txd[i].xd_addr = 352 (uint32_t)(txbufdma + (i % ntbuf) * pktbufsz); 353 qr->rb_txd[i].xd_flags = 0; 354 } 355 356 /* 357 * Initialize receive buffer descriptors 358 */ 359 for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) { 360 qr->rb_rxd[i].xd_addr = 361 (uint32_t)(rxbufdma + (i % nrbuf) * pktbufsz); 362 qr->rb_rxd[i].xd_flags = (i < nrbuf) 363 ? QEC_XD_OWN | (pktbufsz & QEC_XD_LENGTH) 364 : 0; 365 } 366 367 qr->rb_tdhead = qr->rb_tdtail = 0; 368 qr->rb_td_nbusy = 0; 369 qr->rb_rdtail = 0; 370 } 371
Indexes created Sat Sep 20 22:09:52 GMT 2025