/* $OpenBSD: ppb.c,v 1.55 2012/10/08 21:47:50 deraadt Exp $ */ /* $NetBSD: ppb.c,v 1.16 1997/06/06 23:48:05 thorpej Exp $ */ /* * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #ifndef PCI_IO_START #define PCI_IO_START 0 #endif #ifndef PCI_IO_END #define PCI_IO_END 0xffffffff #endif #ifndef PCI_MEM_START #define PCI_MEM_START 0 #endif #ifndef PCI_MEM_END #define PCI_MEM_END 0xffffffff #endif struct ppb_softc { struct device sc_dev; /* generic device glue */ pci_chipset_tag_t sc_pc; /* our PCI chipset... */ pcitag_t sc_tag; /* ...and tag. */ pci_intr_handle_t sc_ih[4]; void *sc_intrhand; struct extent *sc_ioex; struct extent *sc_memex; struct extent *sc_pmemex; struct device *sc_psc; int sc_cap_off; struct timeout sc_to; bus_addr_t sc_iobase, sc_iolimit; bus_addr_t sc_membase, sc_memlimit; bus_addr_t sc_pmembase, sc_pmemlimit; pcireg_t sc_csr; pcireg_t sc_bhlcr; pcireg_t sc_bir; pcireg_t sc_bcr; pcireg_t sc_int; pcireg_t sc_slcsr; pcireg_t sc_msi_mc; pcireg_t sc_msi_ma; pcireg_t sc_msi_mau32; pcireg_t sc_msi_md; int sc_pmcsr_state; }; int ppbmatch(struct device *, void *, void *); void ppbattach(struct device *, struct device *, void *); int ppbdetach(struct device *self, int flags); int ppbactivate(struct device *self, int act); struct cfattach ppb_ca = { sizeof(struct ppb_softc), ppbmatch, ppbattach, ppbdetach, ppbactivate }; struct cfdriver ppb_cd = { NULL, "ppb", DV_DULL }; void ppb_alloc_resources(struct ppb_softc *, struct pci_attach_args *); int ppb_intr(void *); void ppb_hotplug_insert(void *, void *); void ppb_hotplug_insert_finish(void *); int ppb_hotplug_fixup(struct pci_attach_args *); int ppb_hotplug_fixup_type0(pci_chipset_tag_t, pcitag_t, pcitag_t); int ppb_hotplug_fixup_type1(pci_chipset_tag_t, pcitag_t, pcitag_t); void ppb_hotplug_rescan(void *, void *); void ppb_hotplug_remove(void *, void *); int ppbprint(void *, const char *pnp); int ppbmatch(struct device *parent, void *match, void *aux) { struct pci_attach_args *pa = aux; /* * This device is mislabeled. It is not a PCI bridge. */ if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT82C586_PWR) return (0); /* * Check the ID register to see that it's a PCI bridge. * If it is, we assume that we can deal with it; it _should_ * work in a standardized way... */ if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) return (1); return (0); } void ppbattach(struct device *parent, struct device *self, void *aux) { struct ppb_softc *sc = (struct ppb_softc *)self; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; struct pcibus_attach_args pba; pci_intr_handle_t ih; pcireg_t busdata, reg, blr; char *name; int pin; sc->sc_pc = pc; sc->sc_tag = pa->pa_tag; busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO); if (PPB_BUSINFO_SECONDARY(busdata) == 0) { printf(": not configured by system firmware\n"); return; } #if 0 /* * XXX can't do this, because we're not given our bus number * (we shouldn't need it), and because we've no way to * decompose our tag. */ /* sanity check. */ if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata)) panic("ppbattach: bus in tag (%d) != bus in reg (%d)", pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata)); #endif /* Check for PCI Express capabilities and setup hotplug support. */ if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PCIEXPRESS, &sc->sc_cap_off, ®) && (reg & PCI_PCIE_XCAP_SI)) { #ifdef __i386__ if (pci_intr_map(pa, &ih) == 0) sc->sc_intrhand = pci_intr_establish(pc, ih, IPL_BIO, ppb_intr, sc, self->dv_xname); #else if (pci_intr_map_msi(pa, &ih) == 0 || pci_intr_map(pa, &ih) == 0) sc->sc_intrhand = pci_intr_establish(pc, ih, IPL_BIO, ppb_intr, sc, self->dv_xname); #endif if (sc->sc_intrhand) { printf(": %s", pci_intr_string(pc, ih)); /* Enable hotplug interrupt. */ reg = pci_conf_read(pc, pa->pa_tag, sc->sc_cap_off + PCI_PCIE_SLCSR); reg |= (PCI_PCIE_SLCSR_HPE | PCI_PCIE_SLCSR_PDE); pci_conf_write(pc, pa->pa_tag, sc->sc_cap_off + PCI_PCIE_SLCSR, reg); timeout_set(&sc->sc_to, ppb_hotplug_insert_finish, sc); } } printf("\n"); if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL || (PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_INTEL_82801BA_HPB && PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_INTEL_82801BAM_HPB)) ppb_alloc_resources(sc, pa); for (pin = PCI_INTERRUPT_PIN_A; pin <= PCI_INTERRUPT_PIN_D; pin++) { pa->pa_intrpin = pa->pa_rawintrpin = pin; pa->pa_intrline = 0; pci_intr_map(pa, &sc->sc_ih[pin - PCI_INTERRUPT_PIN_A]); } /* * The UltraSPARC-IIi APB doesn't implement the standard * address range registers. */ if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_SIMBA) goto attach; /* Figure out the I/O address range of the bridge. */ blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_IOSTATUS); sc->sc_iobase = (blr & 0x000000f0) << 8; sc->sc_iolimit = (blr & 0x000f000) | 0x00000fff; blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_IO_HI); sc->sc_iobase |= (blr & 0x0000ffff) << 16; sc->sc_iolimit |= (blr & 0xffff0000); if (sc->sc_iolimit > sc->sc_iobase) { name = malloc(32, M_DEVBUF, M_NOWAIT); if (name) { snprintf(name, 32, "%s pciio", sc->sc_dev.dv_xname); sc->sc_ioex = extent_create(name, 0, 0xffffffff, M_DEVBUF, NULL, 0, EX_NOWAIT | EX_FILLED); extent_free(sc->sc_ioex, sc->sc_iobase, sc->sc_iolimit - sc->sc_iobase + 1, EX_NOWAIT); } } /* Figure out the memory mapped I/O address range of the bridge. */ blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_MEM); sc->sc_membase = (blr & 0x0000fff0) << 16; sc->sc_memlimit = (blr & 0xfff00000) | 0x000fffff; if (sc->sc_memlimit > sc->sc_membase) { name = malloc(32, M_DEVBUF, M_NOWAIT); if (name) { snprintf(name, 32, "%s pcimem", sc->sc_dev.dv_xname); sc->sc_memex = extent_create(name, 0, 0xffffffff, M_DEVBUF, NULL, 0, EX_NOWAIT | EX_FILLED); extent_free(sc->sc_memex, sc->sc_membase, sc->sc_memlimit - sc->sc_membase + 1, EX_NOWAIT); } } /* Figure out the prefetchable MMI/O address range of the bridge. */ blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_PREFMEM); sc->sc_pmembase = (blr & 0x0000fff0) << 16; sc->sc_pmemlimit = (blr & 0xfff00000) | 0x000fffff; #ifdef __LP64__ /* XXX because extents use long... */ blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_PREFBASE_HI32); sc->sc_pmembase |= ((uint64_t)blr) << 32; blr = pci_conf_read(pc, pa->pa_tag, PPB_REG_PREFLIM_HI32); sc->sc_pmemlimit |= ((uint64_t)blr) << 32; #endif if (sc->sc_pmemlimit > sc->sc_pmembase) { name = malloc(32, M_DEVBUF, M_NOWAIT); if (name) { snprintf(name, 32, "%s pcipmem", sc->sc_dev.dv_xname); sc->sc_pmemex = extent_create(name, 0, (u_long)-1L, M_DEVBUF, NULL, 0, EX_NOWAIT | EX_FILLED); extent_free(sc->sc_pmemex, sc->sc_pmembase, sc->sc_pmemlimit - sc->sc_pmembase + 1, EX_NOWAIT); } } /* * The Intel 82801BAM Hub-to-PCI can decode subtractively. * XXX We probably should handle subtractive decode bridges * in general. */ if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL && (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_82801BA_HPB || PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_82801BAM_HPB)) { if (sc->sc_ioex == NULL) sc->sc_ioex = pa->pa_ioex; if (sc->sc_memex == NULL) sc->sc_memex = pa->pa_memex; } attach: /* * Attach the PCI bus that hangs off of it. * * XXX Don't pass-through Memory Read Multiple. Should we? * XXX Consult the spec... */ bzero(&pba, sizeof(pba)); pba.pba_busname = "pci"; pba.pba_iot = pa->pa_iot; pba.pba_memt = pa->pa_memt; pba.pba_dmat = pa->pa_dmat; pba.pba_pc = pc; pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY; pba.pba_ioex = sc->sc_ioex; pba.pba_memex = sc->sc_memex; pba.pba_pmemex = sc->sc_pmemex; pba.pba_domain = pa->pa_domain; pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata); pba.pba_bridgeih = sc->sc_ih; pba.pba_bridgetag = &sc->sc_tag; pba.pba_intrswiz = pa->pa_intrswiz; pba.pba_intrtag = pa->pa_intrtag; sc->sc_psc = config_found(self, &pba, ppbprint); } int ppbdetach(struct device *self, int flags) { struct ppb_softc *sc = (struct ppb_softc *)self; char *name; int rv; if (sc->sc_intrhand) pci_intr_disestablish(sc->sc_pc, sc->sc_intrhand); rv = config_detach_children(self, flags); if (sc->sc_ioex) { name = sc->sc_ioex->ex_name; extent_destroy(sc->sc_ioex); free(name, M_DEVBUF); } if (sc->sc_memex) { name = sc->sc_memex->ex_name; extent_destroy(sc->sc_memex); free(name, M_DEVBUF); } if (sc->sc_pmemex) { name = sc->sc_pmemex->ex_name; extent_destroy(sc->sc_pmemex); free(name, M_DEVBUF); } return (rv); } int ppbactivate(struct device *self, int act) { struct ppb_softc *sc = (void *)self; pci_chipset_tag_t pc = sc->sc_pc; pcitag_t tag = sc->sc_tag; pcireg_t blr, reg; int off, rv = 0; switch (act) { case DVACT_QUIESCE: rv = config_activate_children(self, act); break; case DVACT_SUSPEND: rv = config_activate_children(self, act); /* Save registers that may get lost. */ sc->sc_csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); sc->sc_bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG); sc->sc_bir = pci_conf_read(pc, tag, PPB_REG_BUSINFO); sc->sc_bcr = pci_conf_read(pc, tag, PPB_REG_BRIDGECONTROL); sc->sc_int = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); if (sc->sc_cap_off) sc->sc_slcsr = pci_conf_read(pc, tag, sc->sc_cap_off + PCI_PCIE_SLCSR); if (pci_get_capability(pc, tag, PCI_CAP_MSI, &off, ®)) { sc->sc_msi_ma = pci_conf_read(pc, tag, off + PCI_MSI_MA); if (reg & PCI_MSI_MC_C64) { sc->sc_msi_mau32 = pci_conf_read(pc, tag, off + PCI_MSI_MAU32); sc->sc_msi_md = pci_conf_read(pc, tag, off + PCI_MSI_MD64); } else { sc->sc_msi_md = pci_conf_read(pc, tag, off + PCI_MSI_MD32); } sc->sc_msi_mc = reg; } break; case DVACT_POWERDOWN: rv = config_activate_children(self, act); if (pci_dopm) { /* * Place the bridge into the lowest possible * power state. */ sc->sc_pmcsr_state = pci_get_powerstate(pc, tag); pci_set_powerstate(pc, tag, pci_min_powerstate(pc, tag)); } break; case DVACT_RESUME: if (pci_dopm) { /* Restore power. */ pci_set_powerstate(pc, tag, sc->sc_pmcsr_state); } /* Restore the registers saved above. */ pci_conf_write(pc, tag, PCI_BHLC_REG, sc->sc_bhlcr); pci_conf_write(pc, tag, PPB_REG_BUSINFO, sc->sc_bir); pci_conf_write(pc, tag, PPB_REG_BRIDGECONTROL, sc->sc_bcr); pci_conf_write(pc, tag, PCI_INTERRUPT_REG, sc->sc_int); if (sc->sc_cap_off) pci_conf_write(pc, tag, sc->sc_cap_off + PCI_PCIE_SLCSR, sc->sc_slcsr); /* Restore I/O window. */ blr = pci_conf_read(pc, tag, PPB_REG_IOSTATUS); blr &= 0xffff0000; blr |= sc->sc_iolimit & PPB_IO_MASK; blr |= (sc->sc_iobase >> PPB_IO_SHIFT); pci_conf_write(pc, tag, PPB_REG_IOSTATUS, blr); blr = (sc->sc_iobase & 0xffff0000) >> 16; blr |= sc->sc_iolimit & 0xffff0000; pci_conf_write(pc, tag, PPB_REG_IO_HI, blr); /* Restore memory mapped I/O window. */ blr = sc->sc_memlimit & PPB_MEM_MASK; blr |= (sc->sc_membase >> PPB_MEM_SHIFT); pci_conf_write(pc, tag, PPB_REG_MEM, blr); /* Restore prefetchable MMI/O window. */ blr = sc->sc_pmemlimit & PPB_MEM_MASK; blr |= (sc->sc_pmembase >> PPB_MEM_SHIFT); pci_conf_write(pc, tag, PPB_REG_PREFMEM, blr); #ifdef __LP64__ pci_conf_write(pc, tag, PPB_REG_PREFBASE_HI32, sc->sc_pmembase >> 32); pci_conf_write(pc, tag, PPB_REG_PREFLIM_HI32, sc->sc_pmemlimit >> 32); #endif if (pci_get_capability(pc, tag, PCI_CAP_MSI, &off, ®)) { pci_conf_write(pc, tag, off + PCI_MSI_MA, sc->sc_msi_ma); if (reg & PCI_MSI_MC_C64) { pci_conf_write(pc, tag, off + PCI_MSI_MAU32, sc->sc_msi_mau32); pci_conf_write(pc, tag, off + PCI_MSI_MD64, sc->sc_msi_md); } else { pci_conf_write(pc, tag, off + PCI_MSI_MD32, sc->sc_msi_md); } pci_conf_write(pc, tag, off + PCI_MSI_MC, sc->sc_msi_mc); } /* * Restore command register last to avoid exposing * uninitialised windows. */ reg = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, (reg & 0xffff0000) | (sc->sc_csr & 0x0000ffff)); rv = config_activate_children(self, act); break; } return (rv); } void ppb_alloc_resources(struct ppb_softc *sc, struct pci_attach_args *pa) { pci_chipset_tag_t pc = sc->sc_pc; pcireg_t id, busdata, blr, bhlcr, type, csr; pcireg_t addr, mask; pcitag_t tag; int bus, dev; int reg, reg_start, reg_end, reg_rom; int io_count = 0; int mem_count = 0; bus_addr_t start, end; u_long base, size; if (pa->pa_memex == NULL) return; busdata = pci_conf_read(pc, sc->sc_tag, PPB_REG_BUSINFO); bus = PPB_BUSINFO_SECONDARY(busdata); if (bus == 0) return; /* * Count number of devices. If there are no devices behind * this bridge, there's no point in allocating any address * space. */ for (dev = 0; dev < pci_bus_maxdevs(pc, bus); dev++) { tag = pci_make_tag(pc, bus, dev, 0); id = pci_conf_read(pc, tag, PCI_ID_REG); if (PCI_VENDOR(id) == PCI_VENDOR_INVALID || PCI_VENDOR(id) == 0) continue; bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG); switch (PCI_HDRTYPE_TYPE(bhlcr)) { case 0: reg_start = PCI_MAPREG_START; reg_end = PCI_MAPREG_END; reg_rom = PCI_ROM_REG; break; case 1: /* PCI-PCI bridge */ reg_start = PCI_MAPREG_START; reg_end = PCI_MAPREG_PPB_END; reg_rom = 0; /* 0x38 */ break; case 2: /* PCI-Cardbus bridge */ reg_start = PCI_MAPREG_START; reg_end = PCI_MAPREG_PCB_END; reg_rom = 0; break; default: return; } for (reg = reg_start; reg < reg_end; reg += 4) { if (pci_mapreg_probe(pc, tag, reg, &type) == 0) continue; if (type == PCI_MAPREG_TYPE_IO) io_count++; else mem_count++; } if (reg_rom != 0) { addr = pci_conf_read(pc, tag, reg_rom); pci_conf_write(pc, tag, reg_rom, ~PCI_ROM_ENABLE); mask = pci_conf_read(pc, tag, reg_rom); pci_conf_write(pc, tag, reg_rom, addr); if (PCI_ROM_SIZE(mask)) mem_count++; } } csr = pci_conf_read(pc, sc->sc_tag, PCI_COMMAND_STATUS_REG); /* * Get the bridge in a consistent state. If memory mapped I/O * is disabled, disabled the associated windows as well. */ if ((csr & PCI_COMMAND_MEM_ENABLE) == 0) { pci_conf_write(pc, sc->sc_tag, PPB_REG_MEM, 0x0000ffff); pci_conf_write(pc, sc->sc_tag, PPB_REG_PREFMEM, 0x0000ffff); pci_conf_write(pc, sc->sc_tag, PPB_REG_PREFBASE_HI32, 0); pci_conf_write(pc, sc->sc_tag, PPB_REG_PREFLIM_HI32, 0); } /* Allocate I/O address space if necessary. */ if (io_count > 0 && pa->pa_ioex) { blr = pci_conf_read(pc, sc->sc_tag, PPB_REG_IOSTATUS); sc->sc_iobase = (blr << PPB_IO_SHIFT) & PPB_IO_MASK; sc->sc_iolimit = (blr & PPB_IO_MASK) | 0x00000fff; blr = pci_conf_read(pc, sc->sc_tag, PPB_REG_IO_HI); sc->sc_iobase |= (blr & 0x0000ffff) << 16; sc->sc_iolimit |= (blr & 0xffff0000); if (sc->sc_iolimit < sc->sc_iobase || sc->sc_iobase == 0) { start = max(PCI_IO_START, pa->pa_ioex->ex_start); end = min(PCI_IO_END, pa->pa_ioex->ex_end); for (size = 0x2000; size >= PPB_IO_MIN; size >>= 1) if (extent_alloc_subregion(pa->pa_ioex, start, end, size, size, 0, 0, 0, &base) == 0) break; if (size >= PPB_IO_MIN) { sc->sc_iobase = base; sc->sc_iolimit = base + size - 1; blr = pci_conf_read(pc, sc->sc_tag, PPB_REG_IOSTATUS); blr &= 0xffff0000; blr |= sc->sc_iolimit & PPB_IO_MASK; blr |= (sc->sc_iobase >> PPB_IO_SHIFT); pci_conf_write(pc, sc->sc_tag, PPB_REG_IOSTATUS, blr); blr = (sc->sc_iobase & 0xffff0000) >> 16; blr |= sc->sc_iolimit & 0xffff0000; pci_conf_write(pc, sc->sc_tag, PPB_REG_IO_HI, blr); csr |= PCI_COMMAND_IO_ENABLE; } } } /* Allocate memory mapped I/O address space if necessary. */ if (mem_count > 0 && pa->pa_memex) { blr = pci_conf_read(pc, sc->sc_tag, PPB_REG_MEM); sc->sc_membase = (blr << PPB_MEM_SHIFT) & PPB_MEM_MASK; sc->sc_memlimit = (blr & PPB_MEM_MASK) | 0x000fffff; if (sc->sc_memlimit < sc->sc_membase || sc->sc_membase == 0) { start = max(PCI_MEM_START, pa->pa_memex->ex_start); end = min(PCI_MEM_END, pa->pa_memex->ex_end); for (size = 0x2000000; size >= PPB_MEM_MIN; size >>= 1) if (extent_alloc_subregion(pa->pa_memex, start, end, size, size, 0, 0, 0, &base) == 0) break; if (size >= PPB_MEM_MIN) { sc->sc_membase = base; sc->sc_memlimit = base + size - 1; blr = sc->sc_memlimit & PPB_MEM_MASK; blr |= (sc->sc_membase >> PPB_MEM_SHIFT); pci_conf_write(pc, sc->sc_tag, PPB_REG_MEM, blr); csr |= PCI_COMMAND_MEM_ENABLE; } } } pci_conf_write(pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr); } int ppb_intr(void *arg) { struct ppb_softc *sc = arg; pcireg_t reg; /* * XXX ignore hotplug events while in autoconf. On some * machines with onboard re(4), we get a bogus hotplug remove * event when we reset that device. Ignoring that event makes * sure we will not try to forcibly detach re(4) when it isn't * ready to deal with that. */ if (cold) return (0); reg = pci_conf_read(sc->sc_pc, sc->sc_tag, sc->sc_cap_off + PCI_PCIE_SLCSR); if (reg & PCI_PCIE_SLCSR_PDC) { if (reg & PCI_PCIE_SLCSR_PDS) workq_add_task(NULL, 0, ppb_hotplug_insert, sc, NULL); else workq_add_task(NULL, 0, ppb_hotplug_remove, sc, NULL); /* Clear interrupts. */ pci_conf_write(sc->sc_pc, sc->sc_tag, sc->sc_cap_off + PCI_PCIE_SLCSR, reg); return (1); } return (0); } #ifdef PCI_MACHDEP_ENUMERATE_BUS #define pci_enumerate_bus PCI_MACHDEP_ENUMERATE_BUS #else extern int pci_enumerate_bus(struct pci_softc *, int (*)(struct pci_attach_args *), struct pci_attach_args *); #endif void ppb_hotplug_insert(void *arg1, void *arg2) { struct ppb_softc *sc = arg1; struct pci_softc *psc = (struct pci_softc *)sc->sc_psc; if (!LIST_EMPTY(&psc->sc_devs)) return; /* XXX Powerup the card. */ /* XXX Turn on LEDs. */ /* Wait a second for things to settle. */ timeout_add_sec(&sc->sc_to, 1); } void ppb_hotplug_insert_finish(void *arg) { workq_add_task(NULL, 0, ppb_hotplug_rescan, arg, NULL); } int ppb_hotplug_fixup(struct pci_attach_args *pa) { pcireg_t bhlcr; bhlcr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); switch (PCI_HDRTYPE_TYPE(bhlcr)) { case 0: return ppb_hotplug_fixup_type0(pa->pa_pc, pa->pa_tag, *pa->pa_bridgetag); case 1: return ppb_hotplug_fixup_type1(pa->pa_pc, pa->pa_tag, *pa->pa_bridgetag); default: return (0); } } int ppb_hotplug_fixup_type0(pci_chipset_tag_t pc, pcitag_t tag, pcitag_t bridgetag) { pcireg_t intr; int line; /* * Fill in the interrupt line for platforms that need it. * * XXX We assume that the interrupt line matches the line used * by the PCI Express bridge. This may not be true. */ intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); if (PCI_INTERRUPT_PIN(intr) != PCI_INTERRUPT_PIN_NONE && PCI_INTERRUPT_LINE(intr) == 0) { /* Get the interrupt line from our parent. */ intr = pci_conf_read(pc, bridgetag, PCI_INTERRUPT_REG); line = PCI_INTERRUPT_LINE(intr); intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); intr &= ~(PCI_INTERRUPT_LINE_MASK << PCI_INTERRUPT_LINE_SHIFT); intr |= line << PCI_INTERRUPT_LINE_SHIFT; pci_conf_write(pc, tag, PCI_INTERRUPT_REG, intr); } return (0); } int ppb_hotplug_fixup_type1(pci_chipset_tag_t pc, pcitag_t tag, pcitag_t bridgetag) { pcireg_t bhlcr, bir, csr, val; int bus, dev, reg; bir = pci_conf_read(pc, bridgetag, PPB_REG_BUSINFO); if (PPB_BUSINFO_SUBORDINATE(bir) <= PPB_BUSINFO_SECONDARY(bir)) return (0); bus = PPB_BUSINFO_SECONDARY(bir); bir = pci_conf_read(pc, tag, PPB_REG_BUSINFO); bir &= (0xff << 24); bir |= bus++; bir |= (bus << 8); bir |= (bus << 16); pci_conf_write(pc, tag, PPB_REG_BUSINFO, bir); for (reg = PPB_REG_IOSTATUS; reg < PPB_REG_BRIDGECONTROL; reg += 4) { val = pci_conf_read(pc, bridgetag, reg); pci_conf_write(pc, tag, reg, val); } csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); csr |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE; csr |= PCI_COMMAND_MASTER_ENABLE; csr |= PCI_COMMAND_INVALIDATE_ENABLE; csr |= PCI_COMMAND_SERR_ENABLE; pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); for (dev = 0; dev < pci_bus_maxdevs(pc, bus); dev++) { tag = pci_make_tag(pc, bus, dev, 0); bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG); if (PCI_HDRTYPE_TYPE(bhlcr) != 0) continue; ppb_hotplug_fixup_type0(pc, tag, bridgetag); } return (0); } void ppb_hotplug_rescan(void *arg1, void *arg2) { struct ppb_softc *sc = arg1; struct pci_softc *psc = (struct pci_softc *)sc->sc_psc; if (psc) { /* Assign resources. */ pci_enumerate_bus(psc, ppb_hotplug_fixup, NULL); /* Attach devices. */ pci_enumerate_bus(psc, NULL, NULL); } } void ppb_hotplug_remove(void *arg1, void *arg2) { struct ppb_softc *sc = arg1; struct pci_softc *psc = (struct pci_softc *)sc->sc_psc; if (psc) { pci_detach_devices(psc, DETACH_FORCE); /* * XXX Allocate the entire window with EX_CONFLICTOK * such that we can easily free it. */ if (sc->sc_ioex != NULL) { extent_alloc_region(sc->sc_ioex, sc->sc_iobase, sc->sc_iolimit - sc->sc_iobase + 1, EX_NOWAIT | EX_CONFLICTOK); extent_free(sc->sc_ioex, sc->sc_iobase, sc->sc_iolimit - sc->sc_iobase + 1, EX_NOWAIT); } if (sc->sc_memex != NULL) { extent_alloc_region(sc->sc_memex, sc->sc_membase, sc->sc_memlimit - sc->sc_membase + 1, EX_NOWAIT | EX_CONFLICTOK); extent_free(sc->sc_memex, sc->sc_membase, sc->sc_memlimit - sc->sc_membase + 1, EX_NOWAIT); } if (sc->sc_pmemex != NULL) { extent_alloc_region(sc->sc_pmemex, sc->sc_pmembase, sc->sc_pmemlimit - sc->sc_pmembase + 1, EX_NOWAIT | EX_CONFLICTOK); extent_free(sc->sc_pmemex, sc->sc_pmembase, sc->sc_pmemlimit - sc->sc_pmembase + 1, EX_NOWAIT); } } } int ppbprint(void *aux, const char *pnp) { struct pcibus_attach_args *pba = aux; /* only PCIs can attach to PPBs; easy. */ if (pnp) printf("pci at %s", pnp); printf(" bus %d", pba->pba_bus); return (UNCONF); }