ppb.c revision 1.52
1 /* $NetBSD: ppb.c,v 1.52 2013/04/21 19:59:41 msaitoh Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1998 Christopher G. Demetriou. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: ppb.c,v 1.52 2013/04/21 19:59:41 msaitoh Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/device.h> 40 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/ppbreg.h> 44 #include <dev/pci/pcidevs.h> 45 46 #define PCIE_SLCSR_NOTIFY_MASK \ 47 (PCIE_SLCSR_ABE | PCIE_SLCSR_PFE | PCIE_SLCSR_MSE | \ 48 PCIE_SLCSR_PDE | PCIE_SLCSR_CCE | PCIE_SLCSR_HPE) 49 50 struct ppb_softc { 51 device_t sc_dev; /* generic device glue */ 52 pci_chipset_tag_t sc_pc; /* our PCI chipset... */ 53 pcitag_t sc_tag; /* ...and tag. */ 54 55 pcireg_t sc_pciconfext[48]; 56 }; 57 58 static const char pcie_linkspeed_strings[4][5] = { 59 "1.25", "2.5", "5.0", "8.0", 60 }; 61 62 static bool ppb_resume(device_t, const pmf_qual_t *); 63 static bool ppb_suspend(device_t, const pmf_qual_t *); 64 65 static int 66 ppbmatch(device_t parent, cfdata_t match, void *aux) 67 { 68 struct pci_attach_args *pa = aux; 69 70 /* 71 * Check the ID register to see that it's a PCI bridge. 72 * If it is, we assume that we can deal with it; it _should_ 73 * work in a standardized way... 74 */ 75 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 76 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) 77 return 1; 78 79 #ifdef __powerpc__ 80 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PROCESSOR && 81 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PROCESSOR_POWERPC) { 82 pcireg_t bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, 83 PCI_BHLC_REG); 84 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_FREESCALE 85 && PCI_HDRTYPE(bhlc) == PCI_HDRTYPE_RC) 86 return 1; 87 } 88 #endif 89 90 #ifdef _MIPS_PADDR_T_64BIT 91 /* The LDT HB acts just like a PPB. */ 92 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIBYTE 93 && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SIBYTE_BCM1250_LDTHB) 94 return 1; 95 #endif 96 97 return 0; 98 } 99 100 static void 101 ppb_fix_pcie(device_t self) 102 { 103 struct ppb_softc *sc = device_private(self); 104 pcireg_t reg; 105 int off; 106 107 if (!pci_get_capability(sc->sc_pc, sc->sc_tag, PCI_CAP_PCIEXPRESS, 108 &off, ®)) 109 return; /* Not a PCIe device */ 110 111 aprint_normal_dev(self, "PCI Express "); 112 switch (reg & PCIE_XCAP_VER_MASK) { 113 case PCIE_XCAP_VER_1_0: 114 aprint_normal("1.0"); 115 break; 116 case PCIE_XCAP_VER_2_0: 117 aprint_normal("2.0"); 118 break; 119 default: 120 aprint_normal_dev(self, 121 "version unsupported (0x%" PRIxMAX ")\n", 122 __SHIFTOUT(reg, PCIE_XCAP_VER_MASK)); 123 return; 124 } 125 aprint_normal(" <"); 126 switch (reg & PCIE_XCAP_TYPE_MASK) { 127 case PCIE_XCAP_TYPE_PCIE_DEV: 128 aprint_normal("PCI-E Endpoint device"); 129 break; 130 case PCIE_XCAP_TYPE_PCI_DEV: 131 aprint_normal("Legacy PCI-E Endpoint device"); 132 break; 133 case PCIE_XCAP_TYPE_ROOT: 134 aprint_normal("Root Port of PCI-E Root Complex"); 135 break; 136 case PCIE_XCAP_TYPE_UP: 137 aprint_normal("Upstream Port of PCI-E Switch"); 138 break; 139 case PCIE_XCAP_TYPE_DOWN: 140 aprint_normal("Downstream Port of PCI-E Switch"); 141 break; 142 case PCIE_XCAP_TYPE_PCIE2PCI: 143 aprint_normal("PCI-E to PCI/PCI-X Bridge"); 144 break; 145 case PCIE_XCAP_TYPE_PCI2PCIE: 146 aprint_normal("PCI/PCI-X to PCI-E Bridge"); 147 break; 148 default: 149 aprint_normal("Device/Port Type 0x%" PRIxMAX, 150 __SHIFTOUT(reg, PCIE_XCAP_TYPE_MASK)); 151 break; 152 } 153 154 switch (reg & PCIE_XCAP_TYPE_MASK) { 155 case PCIE_XCAP_TYPE_ROOT: 156 case PCIE_XCAP_TYPE_DOWN: 157 case PCIE_XCAP_TYPE_PCI2PCIE: 158 reg = pci_conf_read(sc->sc_pc, sc->sc_tag, off + 0x0c); 159 u_int mlw = (reg >> 4) & 0x1f; 160 u_int mls = (reg >> 0) & 0x0f; 161 if (mls < __arraycount(pcie_linkspeed_strings)) { 162 aprint_normal("> x%d @ %sGb/s\n", 163 mlw, pcie_linkspeed_strings[mls]); 164 } else { 165 aprint_normal("> x%d @ %d.%dGb/s\n", 166 mlw, (mls * 25) / 10, (mls * 25) % 10); 167 } 168 169 reg = pci_conf_read(sc->sc_pc, sc->sc_tag, off + 0x10); 170 if (reg & __BIT(29)) { /* DLLA */ 171 u_int lw = (reg >> 20) & 0x1f; 172 u_int ls = (reg >> 16) & 0x0f; 173 if (lw != mlw || ls != mls) { 174 if (ls < __arraycount(pcie_linkspeed_strings)) { 175 aprint_normal_dev(self, 176 "link is x%d @ %sGb/s\n", 177 lw, pcie_linkspeed_strings[ls]); 178 } else { 179 aprint_normal_dev(self, 180 "link is x%d @ %d.%dGb/s\n", 181 lw, (ls * 25) / 10, (ls * 25) % 10); 182 } 183 } 184 } 185 break; 186 default: 187 aprint_normal(">\n"); 188 break; 189 } 190 191 reg = pci_conf_read(sc->sc_pc, sc->sc_tag, off + PCIE_SLCSR); 192 if (reg & PCIE_SLCSR_NOTIFY_MASK) { 193 aprint_debug_dev(self, "disabling notification events\n"); 194 reg &= ~PCIE_SLCSR_NOTIFY_MASK; 195 pci_conf_write(sc->sc_pc, sc->sc_tag, 196 off + PCIE_SLCSR, reg); 197 } 198 } 199 200 static void 201 ppbattach(device_t parent, device_t self, void *aux) 202 { 203 struct ppb_softc *sc = device_private(self); 204 struct pci_attach_args *pa = aux; 205 pci_chipset_tag_t pc = pa->pa_pc; 206 struct pcibus_attach_args pba; 207 pcireg_t busdata; 208 209 pci_aprint_devinfo(pa, NULL); 210 211 sc->sc_pc = pc; 212 sc->sc_tag = pa->pa_tag; 213 sc->sc_dev = self; 214 215 busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO); 216 217 if (PPB_BUSINFO_SECONDARY(busdata) == 0) { 218 aprint_normal_dev(self, "not configured by system firmware\n"); 219 return; 220 } 221 222 ppb_fix_pcie(self); 223 224 #if 0 225 /* 226 * XXX can't do this, because we're not given our bus number 227 * (we shouldn't need it), and because we've no way to 228 * decompose our tag. 229 */ 230 /* sanity check. */ 231 if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata)) 232 panic("ppbattach: bus in tag (%d) != bus in reg (%d)", 233 pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata)); 234 #endif 235 236 if (!pmf_device_register(self, ppb_suspend, ppb_resume)) 237 aprint_error_dev(self, "couldn't establish power handler\n"); 238 239 /* 240 * Attach the PCI bus than hangs off of it. 241 * 242 * XXX Don't pass-through Memory Read Multiple. Should we? 243 * XXX Consult the spec... 244 */ 245 pba.pba_iot = pa->pa_iot; 246 pba.pba_memt = pa->pa_memt; 247 pba.pba_dmat = pa->pa_dmat; 248 pba.pba_dmat64 = pa->pa_dmat64; 249 pba.pba_pc = pc; 250 pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY; 251 pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata); 252 pba.pba_sub = PPB_BUSINFO_SUBORDINATE(busdata); 253 pba.pba_bridgetag = &sc->sc_tag; 254 pba.pba_intrswiz = pa->pa_intrswiz; 255 pba.pba_intrtag = pa->pa_intrtag; 256 257 config_found_ia(self, "pcibus", &pba, pcibusprint); 258 } 259 260 static int 261 ppbdetach(device_t self, int flags) 262 { 263 int rc; 264 265 if ((rc = config_detach_children(self, flags)) != 0) 266 return rc; 267 pmf_device_deregister(self); 268 return 0; 269 } 270 271 static bool 272 ppb_resume(device_t dv, const pmf_qual_t *qual) 273 { 274 struct ppb_softc *sc = device_private(dv); 275 int off; 276 pcireg_t val; 277 278 for (off = 0x40; off <= 0xff; off += 4) { 279 val = pci_conf_read(sc->sc_pc, sc->sc_tag, off); 280 if (val != sc->sc_pciconfext[(off - 0x40) / 4]) 281 pci_conf_write(sc->sc_pc, sc->sc_tag, off, 282 sc->sc_pciconfext[(off - 0x40)/4]); 283 } 284 285 ppb_fix_pcie(dv); 286 287 return true; 288 } 289 290 static bool 291 ppb_suspend(device_t dv, const pmf_qual_t *qual) 292 { 293 struct ppb_softc *sc = device_private(dv); 294 int off; 295 296 for (off = 0x40; off <= 0xff; off += 4) 297 sc->sc_pciconfext[(off - 0x40) / 4] = 298 pci_conf_read(sc->sc_pc, sc->sc_tag, off); 299 300 return true; 301 } 302 303 static void 304 ppbchilddet(device_t self, device_t child) 305 { 306 /* we keep no references to child devices, so do nothing */ 307 } 308 309 CFATTACH_DECL3_NEW(ppb, sizeof(struct ppb_softc), 310 ppbmatch, ppbattach, ppbdetach, NULL, NULL, ppbchilddet, 311 DVF_DETACH_SHUTDOWN); 312
Indexes created Mon Sep 22 10:09:38 GMT 2025