Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sbus/dma_sbus.c
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1 /* $OpenBSD: dma_sbus.c,v 1.12 2005/03/03 01:41:45 miod Exp $ */ 2 /* $NetBSD: dma_sbus.c,v 1.5 2000/07/09 20:57:42 pk Exp $ */ 3 4 /*- 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Paul Kranenburg. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /*- 41 * Copyright (c) 1994 Peter Galbavy. All rights reserved. 42 * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 54 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 55 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 57 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 58 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 62 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65 #include <sys/cdefs.h> 66 __FBSDID("$FreeBSD$"); 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/bus.h> 71 #include <sys/kernel.h> 72 #include <sys/module.h> 73 #include <sys/resource.h> 74 #include <sys/rman.h> 75 76 #include <dev/ofw/ofw_bus.h> 77 #include <dev/ofw/openfirm.h> 78 79 #include <machine/bus.h> 80 #include <machine/bus_common.h> 81 #include <machine/resource.h> 82 83 #include <sparc64/sbus/lsi64854reg.h> 84 #include <sparc64/sbus/lsi64854var.h> 85 #include <sparc64/sbus/ofw_sbus.h> 86 #include <sparc64/sbus/sbusreg.h> 87 #include <sparc64/sbus/sbusvar.h> 88 89 struct dma_devinfo { 90 char *ddi_compat; /* PROM compatible */ 91 char *ddi_model; /* PROM model */ 92 char *ddi_name; /* PROM name */ 93 phandle_t ddi_node; /* PROM node */ 94 char *ddi_type; /* PROM device_type */ 95 96 struct resource_list ddi_rl; 97 }; 98 99 struct dma_softc { 100 struct lsi64854_softc sc_lsi64854; /* base device */ 101 int sc_ign; 102 int sc_slot; 103 }; 104 105 static devclass_t dma_devclass; 106 107 static device_probe_t dma_probe; 108 static device_attach_t dma_attach; 109 static bus_print_child_t dma_print_child; 110 static bus_probe_nomatch_t dma_probe_nomatch; 111 static bus_get_resource_list_t dma_get_resource_list; 112 static ofw_bus_get_compat_t dma_get_compat; 113 static ofw_bus_get_model_t dma_get_model; 114 static ofw_bus_get_name_t dma_get_name; 115 static ofw_bus_get_node_t dma_get_node; 116 static ofw_bus_get_type_t dma_get_type; 117 118 static struct dma_devinfo *dma_setup_dinfo(device_t, phandle_t, char *); 119 static void dma_destroy_dinfo(struct dma_devinfo *); 120 121 static device_method_t dma_methods[] = { 122 /* Device interface */ 123 DEVMETHOD(device_probe, dma_probe), 124 DEVMETHOD(device_attach, dma_attach), 125 DEVMETHOD(device_shutdown, bus_generic_shutdown), 126 DEVMETHOD(device_suspend, bus_generic_suspend), 127 DEVMETHOD(device_resume, bus_generic_resume), 128 129 /* Bus interface */ 130 DEVMETHOD(bus_print_child, dma_print_child), 131 DEVMETHOD(bus_probe_nomatch, dma_probe_nomatch), 132 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 133 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 134 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 135 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 136 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 137 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 138 DEVMETHOD(bus_get_resource_list, dma_get_resource_list), 139 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 140 141 /* ofw_bus interface */ 142 DEVMETHOD(ofw_bus_get_compat, dma_get_compat), 143 DEVMETHOD(ofw_bus_get_model, dma_get_model), 144 DEVMETHOD(ofw_bus_get_name, dma_get_name), 145 DEVMETHOD(ofw_bus_get_node, dma_get_node), 146 DEVMETHOD(ofw_bus_get_type, dma_get_type), 147 148 { 0, 0 } 149 }; 150 151 static driver_t dma_driver = { 152 "dma", 153 dma_methods, 154 sizeof(struct dma_softc), 155 }; 156 157 DRIVER_MODULE(dma, sbus, dma_driver, dma_devclass, 0, 0); 158 MODULE_DEPEND(dma, sbus, 1, 1, 1); 159 MODULE_VERSION(dma, 1); 160 161 static int 162 dma_probe(device_t dev) 163 { 164 const char *name; 165 166 name = ofw_bus_get_name(dev); 167 if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0 || 168 strcmp(name, "ledma") == 0) { 169 device_set_desc_copy(dev, name); 170 return (0); 171 } 172 return (ENXIO); 173 } 174 175 static int 176 dma_attach(device_t dev) 177 { 178 struct dma_softc *dsc; 179 struct lsi64854_softc *lsc; 180 struct dma_devinfo *ddi; 181 device_t cdev; 182 const char *name; 183 char *cabletype, *cname; 184 uint32_t csr; 185 phandle_t child, node; 186 int error, burst, children; 187 188 dsc = device_get_softc(dev); 189 lsc = &dsc->sc_lsi64854; 190 191 name = ofw_bus_get_name(dev); 192 node = ofw_bus_get_node(dev); 193 dsc->sc_ign = sbus_get_ign(dev); 194 dsc->sc_slot = sbus_get_slot(dev); 195 196 lsc->sc_rid = 0; 197 lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &lsc->sc_rid, 198 RF_ACTIVE); 199 if (lsc->sc_res == NULL) { 200 device_printf(dev, "cannot allocate resources\n"); 201 return (ENXIO); 202 } 203 lsc->sc_regt = rman_get_bustag(lsc->sc_res); 204 lsc->sc_regh = rman_get_bushandle(lsc->sc_res); 205 206 if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0) 207 lsc->sc_channel = L64854_CHANNEL_SCSI; 208 else if (strcmp(name, "ledma") == 0) { 209 /* 210 * Check to see which cable type is currently active and 211 * set the appropriate bit in the ledma csr so that it 212 * gets used. If we didn't netboot, the PROM won't have 213 * the "cable-selection" property; default to TP and then 214 * the user can change it via a "media" option to ifconfig. 215 */ 216 csr = L64854_GCSR(lsc); 217 if ((OF_getprop_alloc(node, "cable-selection", 1, 218 (void **)&cabletype)) == -1) { 219 /* assume TP if nothing there */ 220 csr |= E_TP_AUI; 221 } else { 222 if (strcmp(cabletype, "aui") == 0) 223 csr &= ~E_TP_AUI; 224 else 225 csr |= E_TP_AUI; 226 free(cabletype, M_OFWPROP); 227 } 228 L64854_SCSR(lsc, csr); 229 DELAY(20000); /* manual says we need a 20ms delay */ 230 lsc->sc_channel = L64854_CHANNEL_ENET; 231 } else { 232 device_printf(dev, "unsupported DMA channel\n"); 233 error = ENXIO; 234 goto fail_lres; 235 } 236 237 error = bus_dma_tag_create( 238 NULL, /* parent */ 239 PAGE_SIZE, 0, /* alignment, boundary */ 240 BUS_SPACE_MAXADDR, /* lowaddr */ 241 BUS_SPACE_MAXADDR, /* highaddr */ 242 NULL, NULL, /* filter, filterarg */ 243 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */ 244 0, /* nsegments */ 245 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 246 0, /* flags */ 247 NULL, NULL, /* no locking */ 248 &lsc->sc_parent_dmat); 249 if (error != 0) { 250 device_printf(dev, "cannot allocate parent DMA tag\n"); 251 goto fail_lres; 252 } 253 254 burst = sbus_get_burstsz(dev); 255 lsc->sc_burst = (burst & SBUS_BURST_32) ? 32 : 256 (burst & SBUS_BURST_16) ? 16 : 0; 257 lsc->sc_dev = dev; 258 259 error = lsi64854_attach(lsc); 260 if (error != 0) { 261 device_printf(dev, "lsi64854_attach failed\n"); 262 goto fail_lpdma; 263 } 264 265 /* Attach children. */ 266 children = 0; 267 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 268 if ((OF_getprop_alloc(child, "name", 1, (void **)&cname)) == -1) 269 continue; 270 if ((ddi = dma_setup_dinfo(dev, child, cname)) == NULL) { 271 device_printf(dev, "<%s>: incomplete\n", cname); 272 free(cname, M_OFWPROP); 273 continue; 274 } 275 if (children != 0) { 276 device_printf(dev, "<%s>: only one child per DMA " 277 "channel supported\n", cname); 278 dma_destroy_dinfo(ddi); 279 free(cname, M_OFWPROP); 280 continue; 281 } 282 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) { 283 device_printf(dev, "<%s>: device_add_child failed\n", 284 cname); 285 dma_destroy_dinfo(ddi); 286 free(cname, M_OFWPROP); 287 continue; 288 } 289 device_set_ivars(cdev, ddi); 290 children++; 291 } 292 error = bus_generic_attach(dev); 293 if (error != 0) { 294 device_printf(dev, "bus_generic_attach failed\n"); 295 goto fail_lsi; 296 } 297 298 return (0); 299 300 fail_lsi: 301 lsi64854_detach(lsc); 302 fail_lpdma: 303 bus_dma_tag_destroy(lsc->sc_parent_dmat); 304 fail_lres: 305 bus_release_resource(dev, SYS_RES_MEMORY, lsc->sc_rid, lsc->sc_res); 306 return (error); 307 } 308 309 static struct dma_devinfo * 310 dma_setup_dinfo(device_t dev, phandle_t node, char *name) 311 { 312 struct dma_softc *dsc; 313 struct dma_devinfo *ddi; 314 struct sbus_regs *reg; 315 uint32_t base, iv, *intr; 316 int i, nreg, nintr, slot, rslot; 317 318 dsc = device_get_softc(dev); 319 320 ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO); 321 if (ddi == NULL) 322 return (NULL); 323 resource_list_init(&ddi->ddi_rl); 324 ddi->ddi_name = name; 325 ddi->ddi_node = node; 326 OF_getprop_alloc(node, "compatible", 1, (void **)&ddi->ddi_compat); 327 OF_getprop_alloc(node, "device_type", 1, (void **)&ddi->ddi_type); 328 OF_getprop_alloc(node, "model", 1, (void **)&ddi->ddi_model); 329 slot = -1; 330 nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®); 331 if (nreg == -1) { 332 dma_destroy_dinfo(ddi); 333 return (NULL); 334 } 335 for (i = 0; i < nreg; i++) { 336 base = reg[i].sbr_offset; 337 if (SBUS_ABS(base)) { 338 rslot = SBUS_ABS_TO_SLOT(base); 339 base = SBUS_ABS_TO_OFFSET(base); 340 } else 341 rslot = reg[i].sbr_slot; 342 if (slot != -1 && slot != rslot) { 343 device_printf(dev, "<%s>: multiple slots\n", name); 344 free(reg, M_OFWPROP); 345 dma_destroy_dinfo(ddi); 346 return (NULL); 347 } 348 slot = rslot; 349 350 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base, 351 base + reg[i].sbr_size, reg[i].sbr_size); 352 } 353 free(reg, M_OFWPROP); 354 if (slot != dsc->sc_slot) { 355 device_printf(dev, "<%s>: parent and child slot do not match\n", 356 name); 357 dma_destroy_dinfo(ddi); 358 return (NULL); 359 } 360 361 /* 362 * The `interrupts' property contains the SBus interrupt level. 363 */ 364 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr), 365 (void **)&intr); 366 if (nintr != -1) { 367 for (i = 0; i < nintr; i++) { 368 iv = intr[i]; 369 /* 370 * SBus card devices need the slot number encoded into 371 * the vector as this is generally not done. 372 */ 373 if ((iv & INTMAP_OBIO_MASK) == 0) 374 iv |= slot << 3; 375 /* Set the IGN as appropriate. */ 376 iv |= dsc->sc_ign << INTMAP_IGN_SHIFT; 377 resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i, 378 iv, iv, 1); 379 } 380 free(intr, M_OFWPROP); 381 } 382 return (ddi); 383 } 384 385 static void 386 dma_destroy_dinfo(struct dma_devinfo *dinfo) 387 { 388 389 resource_list_free(&dinfo->ddi_rl); 390 if (dinfo->ddi_compat != NULL) 391 free(dinfo->ddi_compat, M_OFWPROP); 392 if (dinfo->ddi_model != NULL) 393 free(dinfo->ddi_model, M_OFWPROP); 394 if (dinfo->ddi_type != NULL) 395 free(dinfo->ddi_type, M_OFWPROP); 396 free(dinfo, M_DEVBUF); 397 } 398 399 static int 400 dma_print_child(device_t dev, device_t child) 401 { 402 struct dma_devinfo *ddi; 403 struct resource_list *rl; 404 int rv; 405 406 ddi = device_get_ivars(child); 407 rl = &ddi->ddi_rl; 408 rv = bus_print_child_header(dev, child); 409 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 410 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 411 rv += bus_print_child_footer(dev, child); 412 return (rv); 413 } 414 415 static void 416 dma_probe_nomatch(device_t dev, device_t child) 417 { 418 struct dma_devinfo *ddi; 419 struct resource_list *rl; 420 421 ddi = device_get_ivars(child); 422 rl = &ddi->ddi_rl; 423 device_printf(dev, "<%s>", ddi->ddi_name); 424 resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 425 resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 426 printf(" type %s (no driver attached)\n", 427 ddi->ddi_type != NULL ? ddi->ddi_type : "unknown"); 428 } 429 430 static struct resource_list * 431 dma_get_resource_list(device_t dev, device_t child) 432 { 433 struct dma_devinfo *ddi; 434 435 ddi = device_get_ivars(child); 436 return (&ddi->ddi_rl); 437 } 438 439 static const char * 440 dma_get_compat(device_t bus, device_t dev) 441 { 442 struct dma_devinfo *dinfo; 443 444 dinfo = device_get_ivars(dev); 445 return (dinfo->ddi_compat); 446 } 447 448 static const char * 449 dma_get_model(device_t bus, device_t dev) 450 { 451 struct dma_devinfo *dinfo; 452 453 dinfo = device_get_ivars(dev); 454 return (dinfo->ddi_model); 455 } 456 457 static const char * 458 dma_get_name(device_t bus, device_t dev) 459 { 460 struct dma_devinfo *dinfo; 461 462 dinfo = device_get_ivars(dev); 463 return (dinfo->ddi_name); 464 } 465 466 static phandle_t 467 dma_get_node(device_t bus, device_t dev) 468 { 469 struct dma_devinfo *dinfo; 470 471 dinfo = device_get_ivars(dev); 472 return (dinfo->ddi_node); 473 } 474 475 static const char * 476 dma_get_type(device_t bus, device_t dev) 477 { 478 struct dma_devinfo *dinfo; 479 480 dinfo = device_get_ivars(dev); 481 return (dinfo->ddi_type); 482 }
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