diff options
Diffstat (limited to 'sys/dev/pci/pci.c')
| -rw-r--r-- | sys/dev/pci/pci.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index f1cbe6c1bb10..41bb4b11b1fc 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -92,6 +92,9 @@ static int pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl, int force, int prefetch); static int pci_probe(device_t dev); static int pci_attach(device_t dev); +#ifdef PCI_RES_BUS +static int pci_detach(device_t dev); +#endif static void pci_load_vendor_data(void); static int pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc); @@ -125,7 +128,11 @@ static device_method_t pci_methods[] = { /* Device interface */ DEVMETHOD(device_probe, pci_probe), DEVMETHOD(device_attach, pci_attach), +#ifdef PCI_RES_BUS + DEVMETHOD(device_detach, pci_detach), +#else DEVMETHOD(device_detach, bus_generic_detach), +#endif DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, pci_suspend), DEVMETHOD(device_resume, pci_resume), @@ -337,6 +344,13 @@ TUNABLE_INT("hw.pci.clear_bars", &pci_clear_bars); SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0, "Ignore firmware-assigned resources for BARs."); +#if defined(NEW_PCIB) && defined(PCI_RES_BUS) +static int pci_clear_buses; +TUNABLE_INT("hw.pci.clear_buses", &pci_clear_buses); +SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0, + "Ignore firmware-assigned bus numbers."); +#endif + static int pci_has_quirk(uint32_t devid, int quirk) { @@ -3197,6 +3211,164 @@ xhci_early_takeover(device_t self) bus_release_resource(self, SYS_RES_MEMORY, rid, res); } +#if defined(NEW_PCIB) && defined(PCI_RES_BUS) +static void +pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg, + struct resource_list *rl) +{ + struct resource *res; + char *cp; + u_long start, end, count; + int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus; + + switch (cfg->hdrtype & PCIM_HDRTYPE) { + case PCIM_HDRTYPE_BRIDGE: + sec_reg = PCIR_SECBUS_1; + sub_reg = PCIR_SUBBUS_1; + break; + case PCIM_HDRTYPE_CARDBUS: + sec_reg = PCIR_SECBUS_2; + sub_reg = PCIR_SUBBUS_2; + break; + default: + return; + } + + /* + * If the existing bus range is valid, attempt to reserve it + * from our parent. If this fails for any reason, clear the + * secbus and subbus registers. + * + * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus? + * This would at least preserve the existing sec_bus if it is + * valid. + */ + sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1); + sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1); + + /* Quirk handling. */ + switch (pci_get_devid(dev)) { + case 0x12258086: /* Intel 82454KX/GX (Orion) */ + sup_bus = pci_read_config(dev, 0x41, 1); + if (sup_bus != 0xff) { + sec_bus = sup_bus + 1; + sub_bus = sup_bus + 1; + PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1); + PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1); + } + break; + + case 0x00dd10de: + /* Compaq R3000 BIOS sets wrong subordinate bus number. */ + if ((cp = getenv("smbios.planar.maker")) == NULL) + break; + if (strncmp(cp, "Compal", 6) != 0) { + freeenv(cp); + break; + } + freeenv(cp); + if ((cp = getenv("smbios.planar.product")) == NULL) + break; + if (strncmp(cp, "08A0", 4) != 0) { + freeenv(cp); + break; + } + freeenv(cp); + if (sub_bus < 0xa) { + sub_bus = 0xa; + PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1); + } + break; + } + + if (bootverbose) + printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus); + if (sec_bus > 0 && sub_bus >= sec_bus) { + start = sec_bus; + end = sub_bus; + count = end - start + 1; + + resource_list_add(rl, PCI_RES_BUS, 0, 0ul, ~0ul, count); + + /* + * If requested, clear secondary bus registers in + * bridge devices to force a complete renumbering + * rather than reserving the existing range. However, + * preserve the existing size. + */ + if (pci_clear_buses) + goto clear; + + rid = 0; + res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid, + start, end, count, 0); + if (res != NULL) + return; + + if (bootverbose) + device_printf(bus, + "pci%d:%d:%d:%d secbus failed to allocate\n", + pci_get_domain(dev), pci_get_bus(dev), + pci_get_slot(dev), pci_get_function(dev)); + } + +clear: + PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1); + PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1); +} + +static struct resource * +pci_alloc_secbus(device_t dev, device_t child, int *rid, u_long start, + u_long end, u_long count, u_int flags) +{ + struct pci_devinfo *dinfo; + pcicfgregs *cfg; + struct resource_list *rl; + struct resource *res; + int sec_reg, sub_reg; + + dinfo = device_get_ivars(child); + cfg = &dinfo->cfg; + rl = &dinfo->resources; + switch (cfg->hdrtype & PCIM_HDRTYPE) { + case PCIM_HDRTYPE_BRIDGE: + sec_reg = PCIR_SECBUS_1; + sub_reg = PCIR_SUBBUS_1; + break; + case PCIM_HDRTYPE_CARDBUS: + sec_reg = PCIR_SECBUS_2; + sub_reg = PCIR_SUBBUS_2; + break; + default: + return (NULL); + } + + if (*rid != 0) + return (NULL); + + if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL) + resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count); + if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) { + res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid, + start, end, count, flags & ~RF_ACTIVE); + if (res == NULL) { + resource_list_delete(rl, PCI_RES_BUS, *rid); + device_printf(child, "allocating %lu bus%s failed\n", + count, count == 1 ? "" : "es"); + return (NULL); + } + if (bootverbose) + device_printf(child, + "Lazy allocation of %lu bus%s at %lu\n", count, + count == 1 ? "" : "es", rman_get_start(res)); + PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1); + PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1); + } + return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start, + end, count, flags)); +} +#endif + void pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask) { @@ -3269,6 +3441,14 @@ pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask) else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI) uhci_early_takeover(dev); } + +#if defined(NEW_PCIB) && defined(PCI_RES_BUS) + /* + * Reserve resources for secondary bus ranges behind bridge + * devices. + */ + pci_reserve_secbus(bus, dev, cfg, rl); +#endif } void @@ -3334,10 +3514,22 @@ pci_attach_common(device_t dev) #ifdef PCI_DMA_BOUNDARY int error, tag_valid; #endif +#ifdef PCI_RES_BUS + int rid; +#endif sc = device_get_softc(dev); domain = pcib_get_domain(dev); busno = pcib_get_bus(dev); +#ifdef PCI_RES_BUS + rid = 0; + sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno, + 1, 0); + if (sc->sc_bus == NULL) { + device_printf(dev, "failed to allocate bus number\n"); + return (ENXIO); + } +#endif if (bootverbose) device_printf(dev, "domain=%d, physical bus=%d\n", domain, busno); @@ -3382,6 +3574,21 @@ pci_attach(device_t dev) return (bus_generic_attach(dev)); } +#ifdef PCI_RES_BUS +static int +pci_detach(device_t dev) +{ + struct pci_softc *sc; + int error; + + error = bus_generic_detach(dev); + if (error) + return (error); + sc = device_get_softc(dev); + return (bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus)); +} +#endif + static void pci_set_power_children(device_t dev, device_t *devlist, int numdevs, int state) @@ -3879,6 +4086,10 @@ pci_child_detached(device_t dev, device_t child) pci_printf(&dinfo->cfg, "Device leaked memory resources\n"); if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0) pci_printf(&dinfo->cfg, "Device leaked I/O resources\n"); +#ifdef PCI_RES_BUS + if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0) + pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n"); +#endif pci_cfg_save(child, dinfo, 1); } @@ -4295,6 +4506,11 @@ pci_alloc_resource(device_t dev, device_t child, int type, int *rid, rl = &dinfo->resources; cfg = &dinfo->cfg; switch (type) { +#if defined(NEW_PCIB) && defined(PCI_RES_BUS) + case PCI_RES_BUS: + return (pci_alloc_secbus(dev, child, rid, start, end, count, + flags)); +#endif case SYS_RES_IRQ: /* * Can't alloc legacy interrupt once MSI messages have |