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: releng/8.2/sys/sparc64/sbus/dma_sbus.c 202225 2010-01-13 20:03:24Z marius $"); 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/rman.h> 74 75 #include <dev/ofw/ofw_bus.h> 76 #include <dev/ofw/ofw_bus_subr.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 struct ofw_bus_devinfo ddi_obdinfo; 91 struct resource_list ddi_rl; 92 }; 93 94 struct dma_softc { 95 struct lsi64854_softc sc_lsi64854; /* base device */ 96 int sc_ign; 97 int sc_slot; 98 }; 99 100 static devclass_t dma_devclass; 101 102 static device_probe_t dma_probe; 103 static device_attach_t dma_attach; 104 static bus_print_child_t dma_print_child; 105 static bus_probe_nomatch_t dma_probe_nomatch; 106 static bus_get_resource_list_t dma_get_resource_list; 107 static ofw_bus_get_devinfo_t dma_get_devinfo; 108 109 static struct dma_devinfo *dma_setup_dinfo(device_t, struct dma_softc *, 110 phandle_t); 111 static void dma_destroy_dinfo(struct dma_devinfo *); 112 static int dma_print_res(struct dma_devinfo *); 113 114 static device_method_t dma_methods[] = { 115 /* Device interface */ 116 DEVMETHOD(device_probe, dma_probe), 117 DEVMETHOD(device_attach, dma_attach), 118 DEVMETHOD(device_shutdown, bus_generic_shutdown), 119 DEVMETHOD(device_suspend, bus_generic_suspend), 120 DEVMETHOD(device_resume, bus_generic_resume), 121 122 /* Bus interface */ 123 DEVMETHOD(bus_print_child, dma_print_child), 124 DEVMETHOD(bus_probe_nomatch, dma_probe_nomatch), 125 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 126 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 127 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 128 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 129 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 130 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 131 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 132 DEVMETHOD(bus_get_resource_list, dma_get_resource_list), 133 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 134 135 /* ofw_bus interface */ 136 DEVMETHOD(ofw_bus_get_devinfo, dma_get_devinfo), 137 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 138 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 139 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 140 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 141 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 142 143 KOBJMETHOD_END 144 }; 145 146 static driver_t dma_driver = { 147 "dma", 148 dma_methods, 149 sizeof(struct dma_softc), 150 }; 151 152 /* 153 * The probe order is handled by sbus(4) as we don't want the variants 154 * with children to be attached earlier than the stand-alone controllers 155 * in order to generally preserve the OFW device tree order. 156 */ 157 EARLY_DRIVER_MODULE(dma, sbus, dma_driver, dma_devclass, 0, 0, 158 BUS_PASS_DEFAULT); 159 MODULE_DEPEND(dma, sbus, 1, 1, 1); 160 MODULE_VERSION(dma, 1); 161 162 static int 163 dma_probe(device_t dev) 164 { 165 const char *name; 166 167 name = ofw_bus_get_name(dev); 168 if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0 || 169 strcmp(name, "ledma") == 0) { 170 device_set_desc_copy(dev, name); 171 return (0); 172 } 173 return (ENXIO); 174 } 175 176 static int 177 dma_attach(device_t dev) 178 { 179 struct dma_softc *dsc; 180 struct lsi64854_softc *lsc; 181 struct dma_devinfo *ddi; 182 device_t cdev; 183 const char *name; 184 char *cabletype; 185 uint32_t csr; 186 phandle_t child, node; 187 int error, i; 188 189 dsc = device_get_softc(dev); 190 lsc = &dsc->sc_lsi64854; 191 192 name = ofw_bus_get_name(dev); 193 node = ofw_bus_get_node(dev); 194 dsc->sc_ign = sbus_get_ign(dev); 195 dsc->sc_slot = sbus_get_slot(dev); 196 197 i = 0; 198 lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i, 199 RF_ACTIVE); 200 if (lsc->sc_res == NULL) { 201 device_printf(dev, "cannot allocate resources\n"); 202 return (ENXIO); 203 } 204 205 if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0) 206 lsc->sc_channel = L64854_CHANNEL_SCSI; 207 else if (strcmp(name, "ledma") == 0) { 208 /* 209 * Check to see which cable type is currently active and 210 * set the appropriate bit in the ledma csr so that it 211 * gets used. If we didn't netboot, the PROM won't have 212 * the "cable-selection" property; default to TP and then 213 * the user can change it via a "media" option to ifconfig. 214 */ 215 csr = L64854_GCSR(lsc); 216 if ((OF_getprop_alloc(node, "cable-selection", 1, 217 (void **)&cabletype)) == -1) { 218 /* assume TP if nothing there */ 219 csr |= E_TP_AUI; 220 } else { 221 if (strcmp(cabletype, "aui") == 0) 222 csr &= ~E_TP_AUI; 223 else 224 csr |= E_TP_AUI; 225 free(cabletype, M_OFWPROP); 226 } 227 L64854_SCSR(lsc, csr); 228 DELAY(20000); /* manual says we need a 20ms delay */ 229 lsc->sc_channel = L64854_CHANNEL_ENET; 230 } else { 231 device_printf(dev, "unsupported DMA channel\n"); 232 error = ENXIO; 233 goto fail_lres; 234 } 235 236 error = bus_dma_tag_create( 237 bus_get_dma_tag(dev), /* parent */ 238 1, 0, /* alignment, boundary */ 239 BUS_SPACE_MAXADDR, /* lowaddr */ 240 BUS_SPACE_MAXADDR, /* highaddr */ 241 NULL, NULL, /* filter, filterarg */ 242 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */ 243 0, /* nsegments */ 244 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 245 0, /* flags */ 246 NULL, NULL, /* no locking */ 247 &lsc->sc_parent_dmat); 248 if (error != 0) { 249 device_printf(dev, "cannot allocate parent DMA tag\n"); 250 goto fail_lres; 251 } 252 253 i = sbus_get_burstsz(dev); 254 lsc->sc_burst = (i & SBUS_BURST_32) ? 32 : 255 (i & SBUS_BURST_16) ? 16 : 0; 256 lsc->sc_dev = dev; 257 258 /* Attach children. */ 259 i = 0; 260 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 261 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL) 262 continue; 263 if (i != 0) { 264 device_printf(dev, 265 "<%s>: only one child per DMA channel supported\n", 266 ddi->ddi_obdinfo.obd_name); 267 dma_destroy_dinfo(ddi); 268 continue; 269 } 270 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) { 271 device_printf(dev, "<%s>: device_add_child failed\n", 272 ddi->ddi_obdinfo.obd_name); 273 dma_destroy_dinfo(ddi); 274 continue; 275 } 276 device_set_ivars(cdev, ddi); 277 i++; 278 } 279 return (bus_generic_attach(dev)); 280 281 fail_lres: 282 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lsc->sc_res), 283 lsc->sc_res); 284 return (error); 285 } 286 287 static struct dma_devinfo * 288 dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node) 289 { 290 struct dma_devinfo *ddi; 291 struct sbus_regs *reg; 292 uint32_t base, iv, *intr; 293 int i, nreg, nintr, slot, rslot; 294 295 ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO); 296 if (ofw_bus_gen_setup_devinfo(&ddi->ddi_obdinfo, node) != 0) { 297 free(ddi, M_DEVBUF); 298 return (NULL); 299 } 300 resource_list_init(&ddi->ddi_rl); 301 slot = -1; 302 nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®); 303 if (nreg == -1) { 304 device_printf(dev, "<%s>: incomplete\n", 305 ddi->ddi_obdinfo.obd_name); 306 goto fail; 307 } 308 for (i = 0; i < nreg; i++) { 309 base = reg[i].sbr_offset; 310 if (SBUS_ABS(base)) { 311 rslot = SBUS_ABS_TO_SLOT(base); 312 base = SBUS_ABS_TO_OFFSET(base); 313 } else 314 rslot = reg[i].sbr_slot; 315 if (slot != -1 && slot != rslot) { 316 device_printf(dev, "<%s>: multiple slots\n", 317 ddi->ddi_obdinfo.obd_name); 318 free(reg, M_OFWPROP); 319 goto fail; 320 } 321 slot = rslot; 322 323 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base, 324 base + reg[i].sbr_size, reg[i].sbr_size); 325 } 326 free(reg, M_OFWPROP); 327 if (slot != dsc->sc_slot) { 328 device_printf(dev, "<%s>: parent and child slot do not match\n", 329 ddi->ddi_obdinfo.obd_name); 330 goto fail; 331 } 332 333 /* 334 * The `interrupts' property contains the SBus interrupt level. 335 */ 336 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr), 337 (void **)&intr); 338 if (nintr != -1) { 339 for (i = 0; i < nintr; i++) { 340 iv = intr[i]; 341 /* 342 * SBus card devices need the slot number encoded into 343 * the vector as this is generally not done. 344 */ 345 if ((iv & INTMAP_OBIO_MASK) == 0) 346 iv |= slot << 3; 347 /* Set the IGN as appropriate. */ 348 iv |= dsc->sc_ign << INTMAP_IGN_SHIFT; 349 resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i, 350 iv, iv, 1); 351 } 352 free(intr, M_OFWPROP); 353 } 354 return (ddi); 355 356 fail: 357 dma_destroy_dinfo(ddi); 358 return (NULL); 359 } 360 361 static void 362 dma_destroy_dinfo(struct dma_devinfo *dinfo) 363 { 364 365 resource_list_free(&dinfo->ddi_rl); 366 ofw_bus_gen_destroy_devinfo(&dinfo->ddi_obdinfo); 367 free(dinfo, M_DEVBUF); 368 } 369 370 static int 371 dma_print_child(device_t dev, device_t child) 372 { 373 int rv; 374 375 rv = bus_print_child_header(dev, child); 376 rv += dma_print_res(device_get_ivars(child)); 377 rv += bus_print_child_footer(dev, child); 378 return (rv); 379 } 380 381 static void 382 dma_probe_nomatch(device_t dev, device_t child) 383 { 384 const char *type; 385 386 device_printf(dev, "<%s>", ofw_bus_get_name(child)); 387 dma_print_res(device_get_ivars(child)); 388 type = ofw_bus_get_type(child); 389 printf(" type %s (no driver attached)\n", 390 type != NULL ? type : "unknown"); 391 } 392 393 static struct resource_list * 394 dma_get_resource_list(device_t dev, device_t child) 395 { 396 struct dma_devinfo *ddi; 397 398 ddi = device_get_ivars(child); 399 return (&ddi->ddi_rl); 400 } 401 402 static const struct ofw_bus_devinfo * 403 dma_get_devinfo(device_t bus, device_t child) 404 { 405 struct dma_devinfo *ddi; 406 407 ddi = device_get_ivars(child); 408 return (&ddi->ddi_obdinfo); 409 } 410 411 static int 412 dma_print_res(struct dma_devinfo *ddi) 413 { 414 int rv; 415 416 rv = 0; 417 rv += resource_list_print_type(&ddi->ddi_rl, "mem", SYS_RES_MEMORY, 418 "%#lx"); 419 rv += resource_list_print_type(&ddi->ddi_rl, "irq", SYS_RES_IRQ, "%ld"); 420 return (rv); 421 }
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