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/resource.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 #include <dev/pci/pci_private.h> 51 52 #include "pcib_if.h" 53 #include "pci_if.h" 54 55 typedef uint32_t ofw_pci_intr_t; 56 57 /* Methods */ 58 static device_probe_t ofw_pcibus_probe; 59 static device_attach_t ofw_pcibus_attach; 60 static pci_assign_interrupt_t ofw_pcibus_assign_interrupt; 61 static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo; 62 static int ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, 63 char *buf, size_t buflen); 64 65 static void ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno); 66 static void ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno); 67 68 static device_method_t ofw_pcibus_methods[] = { 69 /* Device interface */ 70 DEVMETHOD(device_probe, ofw_pcibus_probe), 71 DEVMETHOD(device_attach, ofw_pcibus_attach), 72 73 /* Bus interface */ 74 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_child_pnpinfo_str_method), 75 76 /* PCI interface */ 77 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt), 78 79 /* ofw_bus interface */ 80 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo), 81 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 82 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 83 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 84 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 85 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 86 87 { 0, 0 } 88 }; 89 90 struct ofw_pcibus_devinfo { 91 struct pci_devinfo opd_dinfo; 92 struct ofw_bus_devinfo opd_obdinfo; 93 }; 94 95 static devclass_t pci_devclass; 96 97 DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 1 /* no softc */, 98 pci_driver); 99 DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0); 100 MODULE_VERSION(ofw_pcibus, 1); 101 MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); 102 103 static int 104 ofw_pcibus_probe(device_t dev) 105 { 106 107 if (ofw_bus_get_node(dev) == 0) 108 return (ENXIO); 109 device_set_desc(dev, "OFW PCI bus"); 110 111 return (0); 112 } 113 114 static int 115 ofw_pcibus_attach(device_t dev) 116 { 117 u_int busno, domain; 118 119 domain = pcib_get_domain(dev); 120 busno = pcib_get_bus(dev); 121 if (bootverbose) 122 device_printf(dev, "domain=%d, physical bus=%d\n", 123 domain, busno); 124 125 /* 126 * Attach those children represented in the device tree. 127 */ 128 129 ofw_pcibus_enum_devtree(dev, domain, busno); 130 131 /* 132 * We now attach any laggard devices. FDT, for instance, allows 133 * the device tree to enumerate only some PCI devices. Apple's 134 * OF device tree on some Grackle-based hardware can also miss 135 * functions on multi-function cards. 136 */ 137 138 ofw_pcibus_enum_bus(dev, domain, busno); 139 140 return (bus_generic_attach(dev)); 141 } 142 143 static void 144 ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno) 145 { 146 device_t pcib; 147 struct ofw_pci_register pcir; 148 struct ofw_pcibus_devinfo *dinfo; 149 phandle_t node, child; 150 u_int func, slot; 151 int intline; 152 153 pcib = device_get_parent(dev); 154 node = ofw_bus_get_node(dev); 155 156 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 157 if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1) 158 continue; 159 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi); 160 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi); 161 162 /* Some OFW device trees contain dupes. */ 163 if (pci_find_dbsf(domain, busno, slot, func) != NULL) 164 continue; 165 166 /* 167 * The preset in the intline register is usually bogus. Reset 168 * it such that the PCI code will reroute the interrupt if 169 * needed. 170 */ 171 172 intline = PCI_INVALID_IRQ; 173 if (OF_getproplen(child, "interrupts") > 0) 174 intline = 0; 175 PCIB_WRITE_CONFIG(pcib, busno, slot, func, PCIR_INTLINE, 176 intline, 1); 177 178 /* 179 * Now set up the PCI and OFW bus layer devinfo and add it 180 * to the PCI bus. 181 */ 182 183 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 184 domain, busno, slot, func, sizeof(*dinfo)); 185 if (dinfo == NULL) 186 continue; 187 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) != 188 0) { 189 pci_freecfg((struct pci_devinfo *)dinfo); 190 continue; 191 } 192 pci_add_child(dev, (struct pci_devinfo *)dinfo); 193 194 /* 195 * Some devices don't have an intpin set, but do have 196 * interrupts. These are fully specified, and set in the 197 * interrupts property, so add that value to the device's 198 * resource list. 199 */ 200 if (dinfo->opd_dinfo.cfg.intpin == 0) { 201 ofw_pci_intr_t intr; 202 203 if (OF_getprop(child, "interrupts", &intr, 204 sizeof(intr)) > 0) { 205 resource_list_add(&dinfo->opd_dinfo.resources, 206 SYS_RES_IRQ, 0, intr, intr, 1); 207 } 208 } 209 } 210 } 211 212 /* 213 * The following is an almost exact clone of pci_add_children(), with the 214 * addition that it (a) will not add children that have already been added, 215 * and (b) will set up the OFW devinfo to point to invalid values. This is 216 * to handle non-enumerated PCI children as exist in FDT and on the second 217 * function of the Rage 128 in my Blue & White G3. 218 */ 219 220 static void 221 ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno) 222 { 223 device_t pcib; 224 struct ofw_pcibus_devinfo *dinfo; 225 int maxslots; 226 int s, f, pcifunchigh; 227 uint8_t hdrtype; 228 229 pcib = device_get_parent(dev); 230 231 maxslots = PCIB_MAXSLOTS(pcib); 232 for (s = 0; s <= maxslots; s++) { 233 pcifunchigh = 0; 234 f = 0; 235 DELAY(1); 236 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1); 237 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 238 continue; 239 if (hdrtype & PCIM_MFDEV) 240 pcifunchigh = PCI_FUNCMAX; 241 for (f = 0; f <= pcifunchigh; f++) { 242 /* Filter devices we have already added */ 243 if (pci_find_dbsf(domain, busno, s, f) != NULL) 244 continue; 245 246 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device( 247 pcib, domain, busno, s, f, sizeof(*dinfo)); 248 if (dinfo != NULL) { 249 dinfo->opd_obdinfo.obd_node = -1; 250 251 dinfo->opd_obdinfo.obd_name = NULL; 252 dinfo->opd_obdinfo.obd_compat = NULL; 253 dinfo->opd_obdinfo.obd_type = NULL; 254 dinfo->opd_obdinfo.obd_model = NULL; 255 pci_add_child(dev, (struct pci_devinfo *)dinfo); 256 } 257 } 258 } 259 } 260 261 static int 262 ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 263 size_t buflen) 264 { 265 pci_child_pnpinfo_str_method(cbdev, child, buf, buflen); 266 267 if (ofw_bus_get_node(child) != -1) { 268 strlcat(buf, " ", buflen); /* Separate info */ 269 ofw_bus_gen_child_pnpinfo_str(cbdev, child, buf, buflen); 270 } 271 272 return (0); 273 } 274 275 static int 276 ofw_pcibus_assign_interrupt(device_t dev, device_t child) 277 { 278 ofw_pci_intr_t intr; 279 phandle_t node; 280 int isz; 281 282 node = ofw_bus_get_node(child); 283 284 if (node == -1) { 285 /* Non-firmware enumerated child, use standard routing */ 286 287 /* 288 * XXX: Right now we don't have anything sensible to do here, 289 * since the ofw_imap stuff relies on nodes have a reg 290 * property. There exists ways around this, so the ePAPR 291 * spec will need to be studied. 292 */ 293 294 return (0); 295 296 #ifdef NOTYET 297 intr = pci_get_intpin(child); 298 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 299 intr)); 300 #endif 301 } 302 303 /* 304 * Any AAPL,interrupts property gets priority and is 305 * fully specified (i.e. does not need routing) 306 */ 307 308 isz = OF_getprop(node, "AAPL,interrupts", &intr, sizeof(intr)); 309 if (isz == sizeof(intr)) { 310 return (intr); 311 } 312 313 isz = OF_getprop(node, "interrupts", &intr, sizeof(intr)); 314 if (isz != sizeof(intr)) { 315 /* No property; our best guess is the intpin. */ 316 intr = pci_get_intpin(child); 317 } 318 319 /* 320 * If we got intr from a property, it may or may not be an intpin. 321 * For on-board devices, it frequently is not, and is completely out 322 * of the valid intpin range. For PCI slots, it hopefully is, 323 * otherwise we will have trouble interfacing with non-OFW buses 324 * such as cardbus. 325 * Since we cannot tell which it is without violating layering, we 326 * will always use the route_interrupt method, and treat exceptions 327 * on the level they become apparent. 328 */ 329 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr)); 330 } 331 332 static const struct ofw_bus_devinfo * 333 ofw_pcibus_get_devinfo(device_t bus, device_t dev) 334 { 335 struct ofw_pcibus_devinfo *dinfo; 336 337 dinfo = device_get_ivars(dev); 338 return (&dinfo->opd_obdinfo); 339 } 340 341