32 33#include "opt_ofw_pci.h" 34 35#include <sys/param.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38#include <sys/libkern.h> 39#include <sys/module.h> 40#include <sys/pciio.h> 41 42#include <dev/ofw/ofw_bus.h> 43#include <dev/ofw/ofw_pci.h> 44#include <dev/ofw/openfirm.h> 45 46#include <machine/bus.h> 47#ifndef SUN4V 48#include <machine/bus_common.h> 49#include <machine/iommureg.h> 50#endif 51#include <machine/resource.h> 52 53#include <dev/pci/pcireg.h> 54#include <dev/pci/pcivar.h> 55#include <dev/pci/pci_private.h> 56 57#include <sparc64/pci/ofw_pci.h> 58 59#include "pcib_if.h" 60#include "pci_if.h" 61 62/* Helper functions */ 63static void ofw_pcibus_setup_device(device_t bridge, uint32_t clock, 64 u_int busno, u_int slot, u_int func); 65 66/* Methods */ 67static device_probe_t ofw_pcibus_probe; 68static device_attach_t ofw_pcibus_attach; 69static pci_assign_interrupt_t ofw_pcibus_assign_interrupt; 70static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo; 71static bus_child_pnpinfo_str_t ofw_pcibus_pnpinfo_str; 72 73static device_method_t ofw_pcibus_methods[] = { 74 /* Device interface */ 75 DEVMETHOD(device_probe, ofw_pcibus_probe), 76 DEVMETHOD(device_attach, ofw_pcibus_attach), 77 78 /* Bus interface */ 79 DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_pnpinfo_str), 80 81 /* PCI interface */ 82 DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt), 83 84 /* ofw_bus interface */ 85 DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo), 86 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 87 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 88 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 89 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 90 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 91 92 KOBJMETHOD_END 93}; 94 95struct ofw_pcibus_devinfo { 96 struct pci_devinfo opd_dinfo; 97 struct ofw_bus_devinfo opd_obdinfo; 98}; 99 100static devclass_t pci_devclass; 101 102DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 1 /* no softc */, 103 pci_driver);
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106MODULE_VERSION(ofw_pcibus, 1); 107MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); 108 109static int 110ofw_pcibus_probe(device_t dev) 111{ 112 113 if (ofw_bus_get_node(dev) == 0) 114 return (ENXIO); 115 device_set_desc(dev, "OFW PCI bus"); 116 117 return (0); 118} 119 120/* 121 * Perform miscellaneous setups the firmware usually does not do for us. 122 */ 123static void 124ofw_pcibus_setup_device(device_t bridge, uint32_t clock, u_int busno, 125 u_int slot, u_int func) 126{ 127#ifndef SUN4V 128 uint32_t reg; 129 130 /* 131 * Initialize the latency timer register for busmaster devices to 132 * work properly. This is another task which the firmware doesn't 133 * always perform. The Min_Gnt register can be used to compute its 134 * recommended value: it contains the desired latency in units of 135 * 1/4 us assuming a clock rate of 33MHz. To calculate the correct 136 * latency timer value, the clock frequency of the bus (defaulting 137 * to 33MHz) should be used and no wait states assumed. 138 * For bridges, we additionally set up the bridge control and the 139 * secondary latency registers. 140 */ 141 if ((PCIB_READ_CONFIG(bridge, busno, slot, func, PCIR_HDRTYPE, 1) & 142 PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE) { 143 reg = PCIB_READ_CONFIG(bridge, busno, slot, func, 144 PCIR_BRIDGECTL_1, 1); 145 reg |= PCIB_BCR_MASTER_ABORT_MODE | PCIB_BCR_SERR_ENABLE | 146 PCIB_BCR_PERR_ENABLE; 147#ifdef OFW_PCI_DEBUG 148 device_printf(bridge, 149 "bridge %d/%d/%d: control 0x%x -> 0x%x\n", 150 busno, slot, func, PCIB_READ_CONFIG(bridge, busno, slot, 151 func, PCIR_BRIDGECTL_1, 1), reg); 152#endif /* OFW_PCI_DEBUG */ 153 PCIB_WRITE_CONFIG(bridge, busno, slot, func, PCIR_BRIDGECTL_1, 154 reg, 1); 155 156 reg = OFW_PCI_LATENCY; 157#ifdef OFW_PCI_DEBUG 158 device_printf(bridge, 159 "bridge %d/%d/%d: latency timer %d -> %d\n", 160 busno, slot, func, PCIB_READ_CONFIG(bridge, busno, slot, 161 func, PCIR_SECLAT_1, 1), reg); 162#endif /* OFW_PCI_DEBUG */ 163 PCIB_WRITE_CONFIG(bridge, busno, slot, func, PCIR_SECLAT_1, 164 reg, 1); 165 } else { 166 reg = PCIB_READ_CONFIG(bridge, busno, slot, func, 167 PCIR_MINGNT, 1); 168 if (reg != 0) { 169 switch (clock) { 170 case 33000000: 171 reg *= 8; 172 break; 173 case 66000000: 174 reg *= 4; 175 break; 176 } 177 reg = min(reg, 255); 178 } else 179 reg = OFW_PCI_LATENCY; 180 } 181#ifdef OFW_PCI_DEBUG 182 device_printf(bridge, "device %d/%d/%d: latency timer %d -> %d\n", 183 busno, slot, func, PCIB_READ_CONFIG(bridge, busno, slot, func, 184 PCIR_LATTIMER, 1), reg); 185#endif /* OFW_PCI_DEBUG */ 186 PCIB_WRITE_CONFIG(bridge, busno, slot, func, PCIR_LATTIMER, reg, 1); 187 188 /* 189 * Compute a value to write into the cache line size register. 190 * The role of the streaming cache is unclear in write invalidate 191 * transfers, so it is made sure that it's line size is always 192 * reached. Generally, the cache line size is fixed at 64 bytes 193 * by Fireplane/Safari, JBus and UPA. 194 */ 195 PCIB_WRITE_CONFIG(bridge, busno, slot, func, PCIR_CACHELNSZ, 196 STRBUF_LINESZ / sizeof(uint32_t), 1); 197#endif 198 199 /* 200 * The preset in the intline register is usually wrong. Reset 201 * it to 255, so that the PCI code will reroute the interrupt if 202 * needed. 203 */ 204 PCIB_WRITE_CONFIG(bridge, busno, slot, func, PCIR_INTLINE, 205 PCI_INVALID_IRQ, 1); 206} 207 208static int 209ofw_pcibus_attach(device_t dev) 210{ 211 device_t pcib; 212 struct ofw_pci_register pcir; 213 struct ofw_pcibus_devinfo *dinfo; 214 phandle_t node, child; 215 uint32_t clock; 216 u_int busno, domain, func, slot; 217 218 pcib = device_get_parent(dev); 219 domain = pcib_get_domain(dev); 220 busno = pcib_get_bus(dev); 221 if (bootverbose) 222 device_printf(dev, "domain=%d, physical bus=%d\n", 223 domain, busno); 224 node = ofw_bus_get_node(dev); 225 226#ifndef SUN4V 227 /* Add the PCI side of the HOST-PCI bridge itself to the bus. */ 228 if (strcmp(device_get_name(device_get_parent(pcib)), "nexus") == 0 && 229 (dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 230 domain, busno, 0, 0, sizeof(*dinfo))) != NULL) { 231 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, node) != 0) 232 pci_freecfg((struct pci_devinfo *)dinfo); 233 else 234 pci_add_child(dev, (struct pci_devinfo *)dinfo); 235 } 236#endif 237 238 if (OF_getprop(ofw_bus_get_node(pcib), "clock-frequency", &clock, 239 sizeof(clock)) == -1) 240 clock = 33000000; 241 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 242 if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1) 243 continue; 244 slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi); 245 func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi); 246 /* Some OFW device trees contain dupes. */ 247 if (pci_find_dbsf(domain, busno, slot, func) != NULL) 248 continue; 249 ofw_pcibus_setup_device(pcib, clock, busno, slot, func); 250 dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib, 251 domain, busno, slot, func, sizeof(*dinfo)); 252 if (dinfo == NULL) 253 continue; 254 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) != 255 0) { 256 pci_freecfg((struct pci_devinfo *)dinfo); 257 continue; 258 } 259 pci_add_child(dev, (struct pci_devinfo *)dinfo); 260 } 261 262 return (bus_generic_attach(dev)); 263} 264 265static int 266ofw_pcibus_assign_interrupt(device_t dev, device_t child) 267{ 268 ofw_pci_intr_t intr; 269 int isz; 270 271 isz = OF_getprop(ofw_bus_get_node(child), "interrupts", &intr, 272 sizeof(intr)); 273 if (isz != sizeof(intr)) { 274 /* No property; our best guess is the intpin. */ 275 intr = pci_get_intpin(child); 276#ifndef SUN4V 277 } else if (intr >= 255) { 278 /* 279 * A fully specified interrupt (including IGN), as present on 280 * SPARCengine Ultra AX and E450. Extract the INO and return 281 * it. 282 */ 283 return (INTINO(intr)); 284#endif 285 } 286 /* 287 * If we got intr from a property, it may or may not be an intpin. 288 * For on-board devices, it frequently is not, and is completely out 289 * of the valid intpin range. For PCI slots, it hopefully is, 290 * otherwise we will have trouble interfacing with non-OFW buses 291 * such as cardbus. 292 * Since we cannot tell which it is without violating layering, we 293 * will always use the route_interrupt method, and treat exceptions 294 * on the level they become apparent. 295 */ 296 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr)); 297} 298 299static const struct ofw_bus_devinfo * 300ofw_pcibus_get_devinfo(device_t bus, device_t dev) 301{ 302 struct ofw_pcibus_devinfo *dinfo; 303 304 dinfo = device_get_ivars(dev); 305 return (&dinfo->opd_obdinfo); 306} 307 308static int 309ofw_pcibus_pnpinfo_str(device_t dev, device_t child, char *buf, 310 size_t buflen) 311{ 312 313 pci_child_pnpinfo_str_method(dev, child, buf, buflen); 314 if (ofw_bus_get_node(child) != -1) { 315 strlcat(buf, " ", buflen); /* Separate info. */ 316 ofw_bus_gen_child_pnpinfo_str(dev, child, buf, buflen); 317 } 318 319 return (0); 320}
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