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 "ofw_pcibus.h" 54 #include "pcib_if.h" 55 #include "pci_if.h" 56 57 typedef uint32_t ofw_pci_intr_t; 58 59 /* Methods */ 60 static device_probe_t ofw_pcibus_probe; 61 static device_attach_t ofw_pcibus_attach; 62 static pci_assign_interrupt_t ofw_pcibus_assign_interrupt; 63 static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo; 64 static int ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, 65 char *buf, size_t buflen); 66 67 static void ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno); 68 static void ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno); 69 70 static device_method_t ofw_pcibus_methods[] = { 71 /* Device interface */ 72 DEVMETHOD(device_probe, ofw_pcibus_probe), 73 DEVMETHOD(device_attach, ofw_pcibus_attach), 74 75 /* Bus interface */ 76 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_child_pnpinfo_str_method), 77 78 /* PCI interface */ 79 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt), 80 81 /* ofw_bus interface */ 82 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo), 83 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 84 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 85 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 86 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 87 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 88 89 DEVMETHOD_END 90 }; 91 92 static devclass_t pci_devclass; 93 94 DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 95 sizeof(struct pci_softc), pci_driver); 96 DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0); 97 MODULE_VERSION(ofw_pcibus, 1); 98 MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); 99 100 static int ofw_devices_only = 0; 101 TUNABLE_INT("hw.pci.ofw_devices_only", &ofw_devices_only); 102 103 static int 104 ofw_pcibus_probe(device_t dev) 105 { 106 107 if (ofw_bus_get_node(dev) == -1) 108 return (ENXIO); 109 device_set_desc(dev, "OFW PCI bus"); 110 111 return (BUS_PROBE_DEFAULT); 112 } 113 114 static int 115 ofw_pcibus_attach(device_t dev) 116 { 117 u_int busno, domain; 118 int error; 119 120 error = pci_attach_common(dev); 121 if (error) 122 return (error); 123 domain = pcib_get_domain(dev); 124 busno = pcib_get_bus(dev); 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 if (!ofw_devices_only) 140 ofw_pcibus_enum_bus(dev, domain, busno); 141 142 return (bus_generic_attach(dev)); 143 } 144 145 static void 146 ofw_pcibus_enum_devtree(device_t dev, u_int domain, u_int busno) 147 { 148 device_t pcib; 149 struct ofw_pci_register pcir; 150 struct ofw_pcibus_devinfo *dinfo; 151 phandle_t node, child; 152 u_int func, slot; 153 int intline; 154 155 pcib = device_get_parent(dev); 156 node = ofw_bus_get_node(dev); 157 158 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 159 if (OF_getencprop(child, "reg", (pcell_t *)&pcir, 160 sizeof(pcir)) == -1) 161 continue; 162 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi); 163 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi); 164 165 /* Some OFW device trees contain dupes. */ 166 if (pci_find_dbsf(domain, busno, slot, func) != NULL) 167 continue; 168 169 /* 170 * The preset in the intline register is usually bogus. Reset 171 * it such that the PCI code will reroute the interrupt if 172 * needed. 173 */ 174 175 intline = PCI_INVALID_IRQ; 176 if (OF_getproplen(child, "interrupts") > 0) 177 intline = 0; 178 PCIB_WRITE_CONFIG(pcib, busno, slot, func, PCIR_INTLINE, 179 intline, 1); 180 181 /* 182 * Now set up the PCI and OFW bus layer devinfo and add it 183 * to the PCI bus. 184 */ 185 186 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 187 domain, busno, slot, func, sizeof(*dinfo)); 188 if (dinfo == NULL) 189 continue; 190 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) != 191 0) { 192 pci_freecfg((struct pci_devinfo *)dinfo); 193 continue; 194 } 195 dinfo->opd_dma_tag = NULL; 196 pci_add_child(dev, (struct pci_devinfo *)dinfo); 197 198 /* 199 * Some devices don't have an intpin set, but do have 200 * interrupts. These are fully specified, and set in the 201 * interrupts property, so add that value to the device's 202 * resource list. 203 */ 204 if (dinfo->opd_dinfo.cfg.intpin == 0) 205 ofw_bus_intr_to_rl(dev, child, 206 &dinfo->opd_dinfo.resources, NULL); 207 } 208 } 209 210 /* 211 * The following is an almost exact clone of pci_add_children(), with the 212 * addition that it (a) will not add children that have already been added, 213 * and (b) will set up the OFW devinfo to point to invalid values. This is 214 * to handle non-enumerated PCI children as exist in FDT and on the second 215 * function of the Rage 128 in my Blue & White G3. 216 */ 217 218 static void 219 ofw_pcibus_enum_bus(device_t dev, u_int domain, u_int busno) 220 { 221 device_t pcib; 222 struct ofw_pcibus_devinfo *dinfo; 223 int maxslots; 224 int s, f, pcifunchigh; 225 uint8_t hdrtype; 226 227 pcib = device_get_parent(dev); 228 229 maxslots = PCIB_MAXSLOTS(pcib); 230 for (s = 0; s <= maxslots; s++) { 231 pcifunchigh = 0; 232 f = 0; 233 DELAY(1); 234 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1); 235 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 236 continue; 237 if (hdrtype & PCIM_MFDEV) 238 pcifunchigh = PCI_FUNCMAX; 239 for (f = 0; f <= pcifunchigh; f++) { 240 /* Filter devices we have already added */ 241 if (pci_find_dbsf(domain, busno, s, f) != NULL) 242 continue; 243 244 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device( 245 pcib, domain, busno, s, f, sizeof(*dinfo)); 246 if (dinfo == NULL) 247 continue; 248 249 dinfo->opd_dma_tag = NULL; 250 dinfo->opd_obdinfo.obd_node = -1; 251 252 dinfo->opd_obdinfo.obd_name = NULL; 253 dinfo->opd_obdinfo.obd_compat = NULL; 254 dinfo->opd_obdinfo.obd_type = NULL; 255 dinfo->opd_obdinfo.obd_model = NULL; 256 257 /* 258 * For non OFW-devices, don't believe 0 259 * for an interrupt. 260 */ 261 if (dinfo->opd_dinfo.cfg.intline == 0) { 262 dinfo->opd_dinfo.cfg.intline = PCI_INVALID_IRQ; 263 PCIB_WRITE_CONFIG(pcib, busno, s, f, 264 PCIR_INTLINE, PCI_INVALID_IRQ, 1); 265 } 266 267 pci_add_child(dev, (struct pci_devinfo *)dinfo); 268 } 269 } 270 } 271 272 static int 273 ofw_pcibus_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 274 size_t buflen) 275 { 276 pci_child_pnpinfo_str_method(cbdev, child, buf, buflen); 277 278 if (ofw_bus_get_node(child) != -1) { 279 strlcat(buf, " ", buflen); /* Separate info */ 280 ofw_bus_gen_child_pnpinfo_str(cbdev, child, buf, buflen); 281 } 282 283 return (0); 284 } 285 286 static int 287 ofw_pcibus_assign_interrupt(device_t dev, device_t child) 288 { 289 ofw_pci_intr_t intr[2]; 290 phandle_t node, iparent; 291 int isz, icells; 292 293 node = ofw_bus_get_node(child); 294 295 if (node == -1) { 296 /* Non-firmware enumerated child, use standard routing */ 297 298 intr[0] = pci_get_intpin(child); 299 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 300 intr[0])); 301 } 302 303 /* 304 * Try to determine the node's interrupt parent so we know which 305 * PIC to use. 306 */ 307 308 iparent = -1; 309 if (OF_getencprop(node, "interrupt-parent", &iparent, 310 sizeof(iparent)) < 0) 311 iparent = -1; 312 icells = 1; 313 if (iparent != -1) 314 OF_getencprop(OF_node_from_xref(iparent), "#interrupt-cells", 315 &icells, sizeof(icells)); 316 317 /* 318 * Any AAPL,interrupts property gets priority and is 319 * fully specified (i.e. does not need routing) 320 */ 321 322 isz = OF_getencprop(node, "AAPL,interrupts", intr, sizeof(intr)); 323 if (isz == sizeof(intr[0])*icells) 324 return ((iparent == -1) ? intr[0] : ofw_bus_map_intr(dev, 325 iparent, icells, intr)); 326 327 isz = OF_getencprop(node, "interrupts", intr, sizeof(intr)); 328 if (isz == sizeof(intr[0])*icells) { 329 if (iparent != -1) 330 intr[0] = ofw_bus_map_intr(dev, iparent, icells, intr); 331 } else { 332 /* No property: our best guess is the intpin. */ 333 intr[0] = pci_get_intpin(child); 334 } 335 336 /* 337 * If we got intr from a property, it may or may not be an intpin. 338 * For on-board devices, it frequently is not, and is completely out 339 * of the valid intpin range. For PCI slots, it hopefully is, 340 * otherwise we will have trouble interfacing with non-OFW buses 341 * such as cardbus. 342 * Since we cannot tell which it is without violating layering, we 343 * will always use the route_interrupt method, and treat exceptions 344 * on the level they become apparent. 345 */ 346 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr[0])); 347 } 348 349 static const struct ofw_bus_devinfo * 350 ofw_pcibus_get_devinfo(device_t bus, device_t dev) 351 { 352 struct ofw_pcibus_devinfo *dinfo; 353 354 dinfo = device_get_ivars(dev); 355 return (&dinfo->opd_obdinfo); 356 } 357 358