1 /*- 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000, BSDi 5 * Copyright (c) 2003, Thomas Moestl <tmm@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/libkern.h> 37 #include <sys/module.h> 38 #include <sys/pciio.h> 39 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 #include <dev/ofw/ofw_pci.h> 43 #include <dev/ofw/openfirm.h> 44 45 #include <machine/bus.h> 46 #include <machine/intr_machdep.h> 47 #include <machine/resource.h> 48 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pci_private.h> 52 53 #include "pcib_if.h" 54 #include "pci_if.h" 55 56 typedef uint32_t ofw_pci_intr_t; 57 58 /* Methods */ 59 static device_probe_t ofw_pcibus_probe; 60 static device_attach_t ofw_pcibus_attach; 61 static pci_assign_interrupt_t ofw_pcibus_assign_interrupt; 62 static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo; 63 static int ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, 64 char *buf, size_t buflen); 65 66 static void ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno); 67 static void ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno); 68 69 static device_method_t ofw_pcibus_methods[] = { 70 /* Device interface */ 71 DEVMETHOD(device_probe, ofw_pcibus_probe), 72 DEVMETHOD(device_attach, ofw_pcibus_attach), 73 74 /* Bus interface */ 75 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_child_pnpinfo_str_method), 76 77 /* PCI interface */ 78 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt), 79 80 /* ofw_bus interface */ 81 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo), 82 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 83 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 84 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 85 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 86 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 87 88 { 0, 0 } 89 }; 90 91 struct ofw_pcibus_devinfo { 92 struct pci_devinfo opd_dinfo; 93 struct ofw_bus_devinfo opd_obdinfo; 94 }; 95 96 static devclass_t pci_devclass; 97 98 DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 1 /* no softc */, 99 pci_driver); 100 DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0); 101 MODULE_VERSION(ofw_pcibus, 1); 102 MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); 103 104 static int 105 ofw_pcibus_probe(device_t dev) 106 { 107 108 if (ofw_bus_get_node(dev) == 0) 109 return (ENXIO); 110 device_set_desc(dev, "OFW PCI bus"); 111 112 return (0); 113 } 114 115 static int 116 ofw_pcibus_attach(device_t dev) 117 { 118 u_int busno, domain; 119 120 domain = pcib_get_domain(dev); 121 busno = pcib_get_bus(dev); 122 if (bootverbose) 123 device_printf(dev, "domain=%d, physical bus=%d\n", 124 domain, busno); 125 126 /* 127 * Attach those children represented in the device tree. 128 */ 129 130 ofw_pcibus_enum_devtree(dev, domain, busno); 131 132 /* 133 * We now attach any laggard devices. FDT, for instance, allows 134 * the device tree to enumerate only some PCI devices. Apple's 135 * OF device tree on some Grackle-based hardware can also miss 136 * functions on multi-function cards. 137 */ 138 139 ofw_pcibus_enum_bus(dev, domain, busno); 140 141 return (bus_generic_attach(dev)); 142 } 143 144 static void 145 ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno) 146 { 147 device_t pcib; 148 struct ofw_pci_register pcir; 149 struct ofw_pcibus_devinfo *dinfo; 150 phandle_t node, child; 151 u_int func, slot; 152 int intline; 153 154 pcib = device_get_parent(dev); 155 node = ofw_bus_get_node(dev); 156 157 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 158 if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1) 159 continue; 160 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi); 161 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi); 162 163 /* Some OFW device trees contain dupes. */ 164 if (pci_find_dbsf(domain, busno, slot, func) != NULL) 165 continue; 166 167 /* 168 * The preset in the intline register is usually bogus. Reset 169 * it such that the PCI code will reroute the interrupt if 170 * needed. 171 */ 172 173 intline = PCI_INVALID_IRQ; 174 if (OF_getproplen(child, "interrupts") > 0) 175 intline = 0; 176 PCIB_WRITE_CONFIG(pcib, busno, slot, func, PCIR_INTLINE, 177 intline, 1); 178 179 /* 180 * Now set up the PCI and OFW bus layer devinfo and add it 181 * to the PCI bus. 182 */ 183 184 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 185 domain, busno, slot, func, sizeof(*dinfo)); 186 if (dinfo == NULL) 187 continue; 188 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) != 189 0) { 190 pci_freecfg((struct pci_devinfo *)dinfo); 191 continue; 192 } 193 pci_add_child(dev, (struct pci_devinfo *)dinfo); 194 195 /* 196 * Some devices don't have an intpin set, but do have 197 * interrupts. These are fully specified, and set in the 198 * interrupts property, so add that value to the device's 199 * resource list. 200 */ 201 if (dinfo->opd_dinfo.cfg.intpin == 0) { 202 ofw_pci_intr_t intr[2]; 203 phandle_t iparent; 204 int icells; 205 206 if (OF_getprop(child, "interrupts", &intr, 207 sizeof(intr)) > 0) { 208 iparent = 0; 209 icells = 1; 210 OF_getprop(child, "interrupt-parent", &iparent, 211 sizeof(iparent)); 212 OF_getprop(iparent, "#interrupt-cells", &icells, 213 sizeof(icells)); 214 215 if (iparent != 0) 216 intr[0] = INTR_VEC(iparent, intr[0]); 217 218 if (iparent != 0 && icells > 1) { 219 powerpc_config_intr(intr[0], 220 (intr[1] & 1) ? INTR_TRIGGER_LEVEL : 221 INTR_TRIGGER_EDGE, 222 INTR_POLARITY_LOW); 223 } 224 225 resource_list_add(&dinfo->opd_dinfo.resources, 226 SYS_RES_IRQ, 0, intr[0], intr[0], 1); 227 } 228 } 229 } 230 } 231 232 /* 233 * The following is an almost exact clone of pci_add_children(), with the 234 * addition that it (a) will not add children that have already been added, 235 * and (b) will set up the OFW devinfo to point to invalid values. This is 236 * to handle non-enumerated PCI children as exist in FDT and on the second 237 * function of the Rage 128 in my Blue & White G3. 238 */ 239 240 static void 241 ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno) 242 { 243 device_t pcib; 244 struct ofw_pcibus_devinfo *dinfo; 245 int maxslots; 246 int s, f, pcifunchigh; 247 uint8_t hdrtype; 248 249 pcib = device_get_parent(dev); 250 251 maxslots = PCIB_MAXSLOTS(pcib); 252 for (s = 0; s <= maxslots; s++) { 253 pcifunchigh = 0; 254 f = 0; 255 DELAY(1); 256 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1); 257 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 258 continue; 259 if (hdrtype & PCIM_MFDEV) 260 pcifunchigh = PCI_FUNCMAX; 261 for (f = 0; f <= pcifunchigh; f++) { 262 /* Filter devices we have already added */ 263 if (pci_find_dbsf(domain, busno, s, f) != NULL) 264 continue; 265 266 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device( 267 pcib, domain, busno, s, f, sizeof(*dinfo)); 268 if (dinfo == NULL) 269 continue; 270 271 dinfo->opd_obdinfo.obd_node = -1; 272 273 dinfo->opd_obdinfo.obd_name = NULL; 274 dinfo->opd_obdinfo.obd_compat = NULL; 275 dinfo->opd_obdinfo.obd_type = NULL; 276 dinfo->opd_obdinfo.obd_model = NULL; 277 278 /* 279 * For non OFW-devices, don't believe 0 280 * for an interrupt. 281 */ 282 if (dinfo->opd_dinfo.cfg.intline == 0) { 283 dinfo->opd_dinfo.cfg.intline = PCI_INVALID_IRQ; 284 PCIB_WRITE_CONFIG(pcib, busno, s, f, 285 PCIR_INTLINE, PCI_INVALID_IRQ, 1); 286 } 287 288 pci_add_child(dev, (struct pci_devinfo *)dinfo); 289 } 290 } 291 } 292 293 static int 294 ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 295 size_t buflen) 296 { 297 pci_child_pnpinfo_str_method(cbdev, child, buf, buflen); 298 299 if (ofw_bus_get_node(child) != -1) { 300 strlcat(buf, " ", buflen); /* Separate info */ 301 ofw_bus_gen_child_pnpinfo_str(cbdev, child, buf, buflen); 302 } 303 304 return (0); 305 } 306 307 static int 308 ofw_pcibus_assign_interrupt(device_t dev, device_t child) 309 { 310 ofw_pci_intr_t intr; 311 phandle_t node, iparent; 312 int isz; 313 314 node = ofw_bus_get_node(child); 315 316 if (node == -1) { 317 /* Non-firmware enumerated child, use standard routing */ 318 319 /* 320 * XXX: Right now we don't have anything sensible to do here, 321 * since the ofw_imap stuff relies on nodes having a reg 322 * property. There exist ways around this, so the ePAPR 323 * spec will need to be studied. 324 */ 325 326 return (PCI_INVALID_IRQ); 327 328 #ifdef NOTYET 329 intr = pci_get_intpin(child); 330 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 331 intr)); 332 #endif 333 } 334 335 /* 336 * Try to determine the node's interrupt parent so we know which 337 * PIC to use. 338 */ 339 340 iparent = -1; 341 if (OF_getprop(node, "interrupt-parent", &iparent, sizeof(iparent)) < 0) 342 iparent = -1; 343 344 /* 345 * Any AAPL,interrupts property gets priority and is 346 * fully specified (i.e. does not need routing) 347 */ 348 349 isz = OF_getprop(node, "AAPL,interrupts", &intr, sizeof(intr)); 350 if (isz == sizeof(intr)) 351 return ((iparent == -1) ? intr : INTR_VEC(iparent, intr)); 352 353 isz = OF_getprop(node, "interrupts", &intr, sizeof(intr)); 354 if (isz == sizeof(intr)) { 355 if (iparent != -1) 356 intr = INTR_VEC(iparent, intr); 357 } else { 358 /* No property: our best guess is the intpin. */ 359 intr = pci_get_intpin(child); 360 } 361 362 /* 363 * If we got intr from a property, it may or may not be an intpin. 364 * For on-board devices, it frequently is not, and is completely out 365 * of the valid intpin range. For PCI slots, it hopefully is, 366 * otherwise we will have trouble interfacing with non-OFW buses 367 * such as cardbus. 368 * Since we cannot tell which it is without violating layering, we 369 * will always use the route_interrupt method, and treat exceptions 370 * on the level they become apparent. 371 */ 372 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr)); 373 } 374 375 static const struct ofw_bus_devinfo * 376 ofw_pcibus_get_devinfo(device_t bus, device_t dev) 377 { 378 struct ofw_pcibus_devinfo *dinfo; 379 380 dinfo = device_get_ivars(dev); 381 return (&dinfo->opd_obdinfo); 382 } 383 384