pci.c revision 1.31.2.2
1 1.31.2.2 thorpej /* $NetBSD: pci.c,v 1.31.2.2 1998/01/31 00:37:40 thorpej Exp $ */ 2 1.31.2.2 thorpej 3 1.31.2.2 thorpej /* 4 1.31.2.2 thorpej * Copyright (c) 1995, 1996, 1997 5 1.31.2.2 thorpej * Christopher G. Demetriou. All rights reserved. 6 1.31.2.2 thorpej * Copyright (c) 1994 Charles Hannum. All rights reserved. 7 1.31.2.2 thorpej * 8 1.31.2.2 thorpej * Redistribution and use in source and binary forms, with or without 9 1.31.2.2 thorpej * modification, are permitted provided that the following conditions 10 1.31.2.2 thorpej * are met: 11 1.31.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 12 1.31.2.2 thorpej * notice, this list of conditions and the following disclaimer. 13 1.31.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 14 1.31.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 15 1.31.2.2 thorpej * documentation and/or other materials provided with the distribution. 16 1.31.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 17 1.31.2.2 thorpej * must display the following acknowledgement: 18 1.31.2.2 thorpej * This product includes software developed by Charles Hannum. 19 1.31.2.2 thorpej * 4. The name of the author may not be used to endorse or promote products 20 1.31.2.2 thorpej * derived from this software without specific prior written permission. 21 1.31.2.2 thorpej * 22 1.31.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 1.31.2.2 thorpej * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 1.31.2.2 thorpej * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 1.31.2.2 thorpej * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 1.31.2.2 thorpej * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 1.31.2.2 thorpej * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 1.31.2.2 thorpej * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 1.31.2.2 thorpej * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 1.31.2.2 thorpej * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 1.31.2.2 thorpej * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 1.31.2.2 thorpej */ 33 1.31.2.2 thorpej 34 1.31.2.2 thorpej /* 35 1.31.2.2 thorpej * PCI bus autoconfiguration. 36 1.31.2.2 thorpej */ 37 1.31.2.2 thorpej 38 1.31.2.2 thorpej #include <sys/param.h> 39 1.31.2.2 thorpej #include <sys/systm.h> 40 1.31.2.2 thorpej #include <sys/device.h> 41 1.31.2.2 thorpej 42 1.31.2.2 thorpej #include <dev/pci/pcireg.h> 43 1.31.2.2 thorpej #include <dev/pci/pcivar.h> 44 1.31.2.2 thorpej 45 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 46 1.31.2.2 thorpej int pcimatch __P((struct device *, void *, void *)); 47 1.31.2.2 thorpej #else 48 1.31.2.2 thorpej int pcimatch __P((struct device *, struct cfdata *, void *)); 49 1.31.2.2 thorpej #endif 50 1.31.2.2 thorpej void pciattach __P((struct device *, struct device *, void *)); 51 1.31.2.2 thorpej 52 1.31.2.2 thorpej struct cfattach pci_ca = { 53 1.31.2.2 thorpej sizeof(struct device), pcimatch, pciattach 54 1.31.2.2 thorpej }; 55 1.31.2.2 thorpej 56 1.31.2.2 thorpej int pciprint __P((void *, const char *)); 57 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 58 1.31.2.2 thorpej int pcisubmatch __P((struct device *, void *, void *)); 59 1.31.2.2 thorpej #else 60 1.31.2.2 thorpej int pcisubmatch __P((struct device *, struct cfdata *, void *)); 61 1.31.2.2 thorpej #endif 62 1.31.2.2 thorpej 63 1.31.2.2 thorpej /* 64 1.31.2.2 thorpej * Callback so that ISA/EISA bridges can attach their child busses 65 1.31.2.2 thorpej * after PCI configuration is done. 66 1.31.2.2 thorpej * 67 1.31.2.2 thorpej * This works because: 68 1.31.2.2 thorpej * (1) there can be at most one ISA/EISA bridge per PCI bus, and 69 1.31.2.2 thorpej * (2) any ISA/EISA bridges must be attached to primary PCI 70 1.31.2.2 thorpej * busses (i.e. bus zero). 71 1.31.2.2 thorpej * 72 1.31.2.2 thorpej * That boils down to: there can only be one of these outstanding 73 1.31.2.2 thorpej * at a time, it is cleared when configuring PCI bus 0 before any 74 1.31.2.2 thorpej * subdevices have been found, and it is run after all subdevices 75 1.31.2.2 thorpej * of PCI bus 0 have been found. 76 1.31.2.2 thorpej * 77 1.31.2.2 thorpej * This is needed because there are some (legacy) PCI devices which 78 1.31.2.2 thorpej * can show up as ISA/EISA devices as well (the prime example of which 79 1.31.2.2 thorpej * are VGA controllers). If you attach ISA from a PCI-ISA/EISA bridge, 80 1.31.2.2 thorpej * and the bridge is seen before the video board is, the board can show 81 1.31.2.2 thorpej * up as an ISA device, and that can (bogusly) complicate the PCI device's 82 1.31.2.2 thorpej * attach code, or make the PCI device not be properly attached at all. 83 1.31.2.2 thorpej */ 84 1.31.2.2 thorpej static void (*pci_isa_bridge_callback) __P((void *)); 85 1.31.2.2 thorpej static void *pci_isa_bridge_callback_arg; 86 1.31.2.2 thorpej 87 1.31.2.2 thorpej int 88 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 89 1.31.2.2 thorpej pcimatch(parent, match, aux) 90 1.31.2.2 thorpej #else 91 1.31.2.2 thorpej pcimatch(parent, cf, aux) 92 1.31.2.2 thorpej #endif 93 1.31.2.2 thorpej struct device *parent; 94 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 95 1.31.2.2 thorpej void *match; 96 1.31.2.2 thorpej #else 97 1.31.2.2 thorpej struct cfdata *cf; 98 1.31.2.2 thorpej #endif 99 1.31.2.2 thorpej void *aux; 100 1.31.2.2 thorpej { 101 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 102 1.31.2.2 thorpej struct cfdata *cf = match; 103 1.31.2.2 thorpej #endif 104 1.31.2.2 thorpej struct pcibus_attach_args *pba = aux; 105 1.31.2.2 thorpej 106 1.31.2.2 thorpej if (strcmp(pba->pba_busname, cf->cf_driver->cd_name)) 107 1.31.2.2 thorpej return (0); 108 1.31.2.2 thorpej 109 1.31.2.2 thorpej /* Check the locators */ 110 1.31.2.2 thorpej if (cf->pcibuscf_bus != PCIBUS_UNK_BUS && 111 1.31.2.2 thorpej cf->pcibuscf_bus != pba->pba_bus) 112 1.31.2.2 thorpej return (0); 113 1.31.2.2 thorpej 114 1.31.2.2 thorpej /* sanity */ 115 1.31.2.2 thorpej if (pba->pba_bus < 0 || pba->pba_bus > 255) 116 1.31.2.2 thorpej return (0); 117 1.31.2.2 thorpej 118 1.31.2.2 thorpej /* 119 1.31.2.2 thorpej * XXX check other (hardware?) indicators 120 1.31.2.2 thorpej */ 121 1.31.2.2 thorpej 122 1.31.2.2 thorpej return 1; 123 1.31.2.2 thorpej } 124 1.31.2.2 thorpej 125 1.31.2.2 thorpej void 126 1.31.2.2 thorpej pciattach(parent, self, aux) 127 1.31.2.2 thorpej struct device *parent, *self; 128 1.31.2.2 thorpej void *aux; 129 1.31.2.2 thorpej { 130 1.31.2.2 thorpej struct pcibus_attach_args *pba = aux; 131 1.31.2.2 thorpej bus_space_tag_t iot, memt; 132 1.31.2.2 thorpej pci_chipset_tag_t pc; 133 1.31.2.2 thorpej int bus, device, maxndevs, function, nfunctions; 134 1.31.2.2 thorpej int io_enabled, mem_enabled; 135 1.31.2.2 thorpej 136 1.31.2.2 thorpej pci_attach_hook(parent, self, pba); 137 1.31.2.2 thorpej printf("\n"); 138 1.31.2.2 thorpej 139 1.31.2.2 thorpej io_enabled = (pba->pba_flags & PCI_FLAGS_IO_ENABLED); 140 1.31.2.2 thorpej mem_enabled = (pba->pba_flags & PCI_FLAGS_MEM_ENABLED); 141 1.31.2.2 thorpej 142 1.31.2.2 thorpej if (io_enabled == 0 && mem_enabled == 0) { 143 1.31.2.2 thorpej printf("%s: no spaces enabled!\n", self->dv_xname); 144 1.31.2.2 thorpej return; 145 1.31.2.2 thorpej } 146 1.31.2.2 thorpej 147 1.31.2.2 thorpej printf("%s: ", self->dv_xname); 148 1.31.2.2 thorpej if (io_enabled) 149 1.31.2.2 thorpej printf("i/o enabled"); 150 1.31.2.2 thorpej if (mem_enabled) { 151 1.31.2.2 thorpej if (io_enabled) 152 1.31.2.2 thorpej printf(", "); 153 1.31.2.2 thorpej printf("memory enabled"); 154 1.31.2.2 thorpej } 155 1.31.2.2 thorpej printf("\n"); 156 1.31.2.2 thorpej 157 1.31.2.2 thorpej iot = pba->pba_iot; 158 1.31.2.2 thorpej memt = pba->pba_memt; 159 1.31.2.2 thorpej pc = pba->pba_pc; 160 1.31.2.2 thorpej bus = pba->pba_bus; 161 1.31.2.2 thorpej maxndevs = pci_bus_maxdevs(pc, bus); 162 1.31.2.2 thorpej 163 1.31.2.2 thorpej if (bus == 0) 164 1.31.2.2 thorpej pci_isa_bridge_callback = NULL; 165 1.31.2.2 thorpej 166 1.31.2.2 thorpej for (device = 0; device < maxndevs; device++) { 167 1.31.2.2 thorpej pcitag_t tag; 168 1.31.2.2 thorpej pcireg_t id, class, intr, bhlcr, csr; 169 1.31.2.2 thorpej struct pci_attach_args pa; 170 1.31.2.2 thorpej int pin; 171 1.31.2.2 thorpej 172 1.31.2.2 thorpej tag = pci_make_tag(pc, bus, device, 0); 173 1.31.2.2 thorpej id = pci_conf_read(pc, tag, PCI_ID_REG); 174 1.31.2.2 thorpej if (id == 0 || id == 0xffffffff) 175 1.31.2.2 thorpej continue; 176 1.31.2.2 thorpej 177 1.31.2.2 thorpej bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG); 178 1.31.2.2 thorpej nfunctions = PCI_HDRTYPE_MULTIFN(bhlcr) ? 8 : 1; 179 1.31.2.2 thorpej 180 1.31.2.2 thorpej for (function = 0; function < nfunctions; function++) { 181 1.31.2.2 thorpej tag = pci_make_tag(pc, bus, device, function); 182 1.31.2.2 thorpej id = pci_conf_read(pc, tag, PCI_ID_REG); 183 1.31.2.2 thorpej if (id == 0 || id == 0xffffffff) 184 1.31.2.2 thorpej continue; 185 1.31.2.2 thorpej csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 186 1.31.2.2 thorpej class = pci_conf_read(pc, tag, PCI_CLASS_REG); 187 1.31.2.2 thorpej intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); 188 1.31.2.2 thorpej 189 1.31.2.2 thorpej pa.pa_iot = iot; 190 1.31.2.2 thorpej pa.pa_memt = memt; 191 1.31.2.2 thorpej pa.pa_dmat = pba->pba_dmat; 192 1.31.2.2 thorpej pa.pa_pc = pc; 193 1.31.2.2 thorpej pa.pa_device = device; 194 1.31.2.2 thorpej pa.pa_function = function; 195 1.31.2.2 thorpej pa.pa_tag = tag; 196 1.31.2.2 thorpej pa.pa_id = id; 197 1.31.2.2 thorpej pa.pa_class = class; 198 1.31.2.2 thorpej 199 1.31.2.2 thorpej /* set up memory and I/O enable flags as appropriate */ 200 1.31.2.2 thorpej pa.pa_flags = 0; 201 1.31.2.2 thorpej if ((pba->pba_flags & PCI_FLAGS_IO_ENABLED) && 202 1.31.2.2 thorpej (csr & PCI_COMMAND_IO_ENABLE)) 203 1.31.2.2 thorpej pa.pa_flags |= PCI_FLAGS_IO_ENABLED; 204 1.31.2.2 thorpej if ((pba->pba_flags & PCI_FLAGS_MEM_ENABLED) && 205 1.31.2.2 thorpej (csr & PCI_COMMAND_MEM_ENABLE)) 206 1.31.2.2 thorpej pa.pa_flags |= PCI_FLAGS_MEM_ENABLED; 207 1.31.2.2 thorpej 208 1.31.2.2 thorpej if (bus == 0) { 209 1.31.2.2 thorpej pa.pa_intrswiz = 0; 210 1.31.2.2 thorpej pa.pa_intrtag = tag; 211 1.31.2.2 thorpej } else { 212 1.31.2.2 thorpej pa.pa_intrswiz = pba->pba_intrswiz + device; 213 1.31.2.2 thorpej pa.pa_intrtag = pba->pba_intrtag; 214 1.31.2.2 thorpej } 215 1.31.2.2 thorpej pin = PCI_INTERRUPT_PIN(intr); 216 1.31.2.2 thorpej if (pin == PCI_INTERRUPT_PIN_NONE) { 217 1.31.2.2 thorpej /* no interrupt */ 218 1.31.2.2 thorpej pa.pa_intrpin = 0; 219 1.31.2.2 thorpej } else { 220 1.31.2.2 thorpej /* 221 1.31.2.2 thorpej * swizzle it based on the number of 222 1.31.2.2 thorpej * busses we're behind and our device 223 1.31.2.2 thorpej * number. 224 1.31.2.2 thorpej */ 225 1.31.2.2 thorpej pa.pa_intrpin = /* XXX */ 226 1.31.2.2 thorpej ((pin + pa.pa_intrswiz - 1) % 4) + 1; 227 1.31.2.2 thorpej } 228 1.31.2.2 thorpej pa.pa_intrline = PCI_INTERRUPT_LINE(intr); 229 1.31.2.2 thorpej 230 1.31.2.2 thorpej config_found_sm(self, &pa, pciprint, pcisubmatch); 231 1.31.2.2 thorpej } 232 1.31.2.2 thorpej } 233 1.31.2.2 thorpej 234 1.31.2.2 thorpej if (bus == 0 && pci_isa_bridge_callback != NULL) 235 1.31.2.2 thorpej (*pci_isa_bridge_callback)(pci_isa_bridge_callback_arg); 236 1.31.2.2 thorpej } 237 1.31.2.2 thorpej 238 1.31.2.2 thorpej int 239 1.31.2.2 thorpej pciprint(aux, pnp) 240 1.31.2.2 thorpej void *aux; 241 1.31.2.2 thorpej const char *pnp; 242 1.31.2.2 thorpej { 243 1.31.2.2 thorpej register struct pci_attach_args *pa = aux; 244 1.31.2.2 thorpej char devinfo[256]; 245 1.31.2.2 thorpej 246 1.31.2.2 thorpej if (pnp) { 247 1.31.2.2 thorpej pci_devinfo(pa->pa_id, pa->pa_class, 1, devinfo); 248 1.31.2.2 thorpej printf("%s at %s", devinfo, pnp); 249 1.31.2.2 thorpej } 250 1.31.2.2 thorpej printf(" dev %d function %d", pa->pa_device, pa->pa_function); 251 1.31.2.2 thorpej #if 0 252 1.31.2.2 thorpej printf(" (%si/o, %smem)", 253 1.31.2.2 thorpej pa->pa_flags & PCI_FLAGS_IO_ENABLED ? "" : "no ", 254 1.31.2.2 thorpej pa->pa_flags & PCI_FLAGS_MEM_ENABLED ? "" : "no "); 255 1.31.2.2 thorpej #endif 256 1.31.2.2 thorpej return (UNCONF); 257 1.31.2.2 thorpej } 258 1.31.2.2 thorpej 259 1.31.2.2 thorpej int 260 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 261 1.31.2.2 thorpej pcisubmatch(parent, match, aux) 262 1.31.2.2 thorpej #else 263 1.31.2.2 thorpej pcisubmatch(parent, cf, aux) 264 1.31.2.2 thorpej #endif 265 1.31.2.2 thorpej struct device *parent; 266 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 267 1.31.2.2 thorpej void *match; 268 1.31.2.2 thorpej #else 269 1.31.2.2 thorpej struct cfdata *cf; 270 1.31.2.2 thorpej #endif 271 1.31.2.2 thorpej void *aux; 272 1.31.2.2 thorpej { 273 1.31.2.2 thorpej #ifdef __BROKEN_INDIRECT_CONFIG 274 1.31.2.2 thorpej struct cfdata *cf = match; 275 1.31.2.2 thorpej #endif 276 1.31.2.2 thorpej struct pci_attach_args *pa = aux; 277 1.31.2.2 thorpej 278 1.31.2.2 thorpej if (cf->pcicf_dev != PCI_UNK_DEV && 279 1.31.2.2 thorpej cf->pcicf_dev != pa->pa_device) 280 1.31.2.2 thorpej return 0; 281 1.31.2.2 thorpej if (cf->pcicf_function != PCI_UNK_FUNCTION && 282 1.31.2.2 thorpej cf->pcicf_function != pa->pa_function) 283 1.31.2.2 thorpej return 0; 284 1.31.2.2 thorpej return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 285 1.31.2.2 thorpej } 286 1.31.2.2 thorpej 287 1.31.2.2 thorpej void 288 1.31.2.2 thorpej set_pci_isa_bridge_callback(fn, arg) 289 1.31.2.2 thorpej void (*fn) __P((void *)); 290 1.31.2.2 thorpej void *arg; 291 1.31.2.2 thorpej { 292 1.31.2.2 thorpej 293 1.31.2.2 thorpej if (pci_isa_bridge_callback != NULL) 294 1.31.2.2 thorpej panic("set_pci_isa_bridge_callback"); 295 1.31.2.2 thorpej pci_isa_bridge_callback = fn; 296 1.31.2.2 thorpej pci_isa_bridge_callback_arg = arg; 297 1.31.2.2 thorpej } 298
Indexes created Tue Sep 30 20:09:53 GMT 2025