/*- * Copyright (c) 2015-2016 Landon Fuller * Copyright (c) 2017 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Landon Fuller * under sponsorship from the FreeBSD Foundation. * * 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, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. */ #include /* * Abstract BHND Bridge Device Driver * * Provides generic support for bridging from a parent bus (such as PCI) to * a BHND-compatible bus (e.g. bcma or siba). */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bhnd_chipc_if.h" #include "bhnd_nvram_if.h" #include "bhndbvar.h" #include "bhndb_bus_if.h" #include "bhndb_hwdata.h" #include "bhndb_private.h" /* Debugging flags */ static u_long bhndb_debug = 0; TUNABLE_ULONG("hw.bhndb.debug", &bhndb_debug); enum { BHNDB_DEBUG_PRIO = 1 << 0, }; #define BHNDB_DEBUG(_type) (BHNDB_DEBUG_ ## _type & bhndb_debug) static bool bhndb_hw_matches(struct bhndb_softc *sc, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw *hw); static int bhndb_init_region_cfg(struct bhndb_softc *sc, bhnd_erom_t *erom, struct bhndb_resources *r, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw_priority *table); static int bhndb_find_hwspec(struct bhndb_softc *sc, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw **hw); bhndb_addrspace bhndb_get_addrspace(struct bhndb_softc *sc, device_t child); static struct rman *bhndb_get_rman(struct bhndb_softc *sc, device_t child, int type); static int bhndb_init_child_resource(struct resource *r, struct resource *parent, bhnd_size_t offset, bhnd_size_t size); static int bhndb_activate_static_region( struct bhndb_softc *sc, struct bhndb_region *region, device_t child, int type, int rid, struct resource *r); static int bhndb_try_activate_resource( struct bhndb_softc *sc, device_t child, int type, int rid, struct resource *r, bool *indirect); static inline struct bhndb_dw_alloc *bhndb_io_resource(struct bhndb_softc *sc, bus_addr_t addr, bus_size_t size, bus_size_t *offset, bool *stolen, bus_addr_t *restore); /** * Default bhndb(4) implementation of DEVICE_PROBE(). * * This function provides the default bhndb implementation of DEVICE_PROBE(), * and is compatible with bhndb(4) bridges attached via bhndb_attach_bridge(). */ int bhndb_generic_probe(device_t dev) { return (BUS_PROBE_NOWILDCARD); } static void bhndb_probe_nomatch(device_t dev, device_t child) { const char *name; name = device_get_name(child); if (name == NULL) name = "unknown device"; device_printf(dev, "<%s> (no driver attached)\n", name); } static int bhndb_print_child(device_t dev, device_t child) { struct resource_list *rl; int retval = 0; retval += bus_print_child_header(dev, child); rl = BUS_GET_RESOURCE_LIST(dev, child); if (rl != NULL) { retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx"); retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); } retval += bus_print_child_domain(dev, child); retval += bus_print_child_footer(dev, child); return (retval); } static int bhndb_child_location(device_t dev, device_t child, struct sbuf *sb) { struct bhndb_softc *sc; sc = device_get_softc(dev); sbuf_printf(sb, "base=0x%llx", (unsigned long long) sc->chipid.enum_addr); return (0); } /** * Return true if @p cores matches the @p hw specification. * * @param sc BHNDB device state. * @param cores A device table to match against. * @param ncores The number of cores in @p cores. * @param hw The hardware description to be matched against. */ static bool bhndb_hw_matches(struct bhndb_softc *sc, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw *hw) { for (u_int i = 0; i < hw->num_hw_reqs; i++) { const struct bhnd_core_match *match; bool found; match = &hw->hw_reqs[i]; found = false; for (u_int d = 0; d < ncores; d++) { struct bhnd_core_info *core = &cores[d]; if (BHNDB_IS_CORE_DISABLED(sc->dev, sc->bus_dev, core)) continue; if (!bhnd_core_matches(core, match)) continue; found = true; break; } if (!found) return (false); } return (true); } /** * Initialize the region maps and priority configuration in @p br using * the priority @p table and the set of cores enumerated by @p erom. * * @param sc The bhndb device state. * @param br The resource state to be configured. * @param erom EROM parser used to enumerate @p cores. * @param cores All cores enumerated on the bridged bhnd bus. * @param ncores The length of @p cores. * @param table Hardware priority table to be used to determine the relative * priorities of per-core port resources. */ static int bhndb_init_region_cfg(struct bhndb_softc *sc, bhnd_erom_t *erom, struct bhndb_resources *br, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw_priority *table) { const struct bhndb_hw_priority *hp; bhnd_addr_t addr; bhnd_size_t size; size_t prio_low, prio_default, prio_high; int error; /* The number of port regions per priority band that must be accessible * via dynamic register windows */ prio_low = 0; prio_default = 0; prio_high = 0; /* * Register bridge regions covering all statically mapped ports. */ for (u_int i = 0; i < ncores; i++) { const struct bhndb_regwin *regw; struct bhnd_core_info *core; struct bhnd_core_match md; core = &cores[i]; md = bhnd_core_get_match_desc(core); for (regw = br->cfg->register_windows; regw->win_type != BHNDB_REGWIN_T_INVALID; regw++) { const struct bhndb_port_priority *pp; uint32_t alloc_flags; /* Only core windows are supported */ if (regw->win_type != BHNDB_REGWIN_T_CORE) continue; /* Skip non-matching cores. */ if (!bhndb_regwin_match_core(regw, core)) continue; /* Fetch the base address of the mapped port */ error = bhnd_erom_lookup_core_addr(erom, &md, regw->d.core.port_type, regw->d.core.port, regw->d.core.region, NULL, &addr, &size); if (error) { /* Skip non-applicable register windows */ if (error == ENOENT) continue; return (error); } /* * Apply the register window's region offset, if any. */ if (regw->d.core.offset > size) { device_printf(sc->dev, "invalid register " "window offset %#jx for region %#jx+%#jx\n", regw->d.core.offset, addr, size); return (EINVAL); } addr += regw->d.core.offset; /* * Always defer to the register window's size. * * If the port size is smaller than the window size, * this ensures that we fully utilize register windows * larger than the referenced port. * * If the port size is larger than the window size, this * ensures that we do not directly map the allocations * within the region to a too-small window. */ size = regw->win_size; /* Fetch allocation flags from the corresponding port * priority entry, if any */ pp = bhndb_hw_priorty_find_port(table, core, regw->d.core.port_type, regw->d.core.port, regw->d.core.region); if (pp != NULL) { alloc_flags = pp->alloc_flags; } else { alloc_flags = 0; } /* * Add to the bus region list. * * The window priority for a statically mapped region is * always HIGH. */ error = bhndb_add_resource_region(br, addr, size, BHNDB_PRIORITY_HIGH, alloc_flags, regw); if (error) return (error); } } /* * Perform priority accounting and register bridge regions for all * ports defined in the priority table */ for (u_int i = 0; i < ncores; i++) { struct bhnd_core_info *core; struct bhnd_core_match md; core = &cores[i]; md = bhnd_core_get_match_desc(core); /* * Skip priority accounting for cores that ... */ /* ... do not require bridge resources */ if (BHNDB_IS_CORE_DISABLED(sc->dev, sc->bus_dev, core)) continue; /* ... do not have a priority table entry */ hp = bhndb_hw_priority_find_core(table, core); if (hp == NULL) continue; /* ... are explicitly disabled in the priority table. */ if (hp->priority == BHNDB_PRIORITY_NONE) continue; /* Determine the number of dynamic windows required and * register their bus_region entries. */ for (u_int i = 0; i < hp->num_ports; i++) { const struct bhndb_port_priority *pp; pp = &hp->ports[i]; /* Fetch the address+size of the mapped port. */ error = bhnd_erom_lookup_core_addr(erom, &md, pp->type, pp->port, pp->region, NULL, &addr, &size); if (error) { /* Skip ports not defined on this device */ if (error == ENOENT) continue; return (error); } /* Skip ports with an existing static mapping */ if (bhndb_has_static_region_mapping(br, addr, size)) continue; /* Define a dynamic region for this port */ error = bhndb_add_resource_region(br, addr, size, pp->priority, pp->alloc_flags, NULL); if (error) return (error); /* Update port mapping counts */ switch (pp->priority) { case BHNDB_PRIORITY_NONE: break; case BHNDB_PRIORITY_LOW: prio_low++; break; case BHNDB_PRIORITY_DEFAULT: prio_default++; break; case BHNDB_PRIORITY_HIGH: prio_high++; break; } } } /* Determine the minimum priority at which we'll allocate direct * register windows from our dynamic pool */ size_t prio_total = prio_low + prio_default + prio_high; if (prio_total <= br->dwa_count) { /* low+default+high priority regions get windows */ br->min_prio = BHNDB_PRIORITY_LOW; } else if (prio_default + prio_high <= br->dwa_count) { /* default+high priority regions get windows */ br->min_prio = BHNDB_PRIORITY_DEFAULT; } else { /* high priority regions get windows */ br->min_prio = BHNDB_PRIORITY_HIGH; } if (BHNDB_DEBUG(PRIO)) { struct bhndb_region *region; const char *direct_msg, *type_msg; bhndb_priority_t prio, prio_min; uint32_t flags; prio_min = br->min_prio; device_printf(sc->dev, "min_prio: %d\n", prio_min); STAILQ_FOREACH(region, &br->bus_regions, link) { prio = region->priority; flags = region->alloc_flags; direct_msg = prio >= prio_min ? "direct" : "indirect"; type_msg = region->static_regwin ? "static" : "dynamic"; device_printf(sc->dev, "region 0x%llx+0x%llx priority " "%u %s/%s", (unsigned long long) region->addr, (unsigned long long) region->size, region->priority, direct_msg, type_msg); if (flags & BHNDB_ALLOC_FULFILL_ON_OVERCOMMIT) printf(" [overcommit]\n"); else printf("\n"); } } return (0); } /** * Find a hardware specification for @p dev. * * @param sc The bhndb device state. * @param cores All cores enumerated on the bridged bhnd bus. * @param ncores The length of @p cores. * @param[out] hw On success, the matched hardware specification. * with @p dev. * * @retval 0 success * @retval non-zero if an error occurs fetching device info for comparison. */ static int bhndb_find_hwspec(struct bhndb_softc *sc, struct bhnd_core_info *cores, u_int ncores, const struct bhndb_hw **hw) { const struct bhndb_hw *next, *hw_table; /* Search for the first matching hardware config. */ hw_table = BHNDB_BUS_GET_HARDWARE_TABLE(sc->parent_dev, sc->dev); for (next = hw_table; next->hw_reqs != NULL; next++) { if (!bhndb_hw_matches(sc, cores, ncores, next)) continue; /* Found */ *hw = next; return (0); } return (ENOENT); } /** * Helper function that must be called by subclass bhndb(4) drivers * when implementing DEVICE_ATTACH() before calling any bhnd(4) or bhndb(4) * APIs on the bridge device. * * This function will add a bridged bhnd(4) child device with a device order of * BHND_PROBE_BUS. Any subclass bhndb(4) driver may use the BHND_PROBE_* * priority bands to add additional devices that will be attached in * their preferred order relative to the bridged bhnd(4) bus. * * @param dev The bridge device to attach. * @param cid The bridged device's chip identification. * @param cores The bridged device's core table. * @param ncores The number of cores in @p cores. * @param bridge_core Core info for the bhnd(4) core serving as the host * bridge. * @param erom_class An erom parser class that may be used to parse * the bridged device's device enumeration table. */ int bhndb_attach(device_t dev, struct bhnd_chipid *cid, struct bhnd_core_info *cores, u_int ncores, struct bhnd_core_info *bridge_core, bhnd_erom_class_t *erom_class) { struct bhndb_devinfo *dinfo; struct bhndb_softc *sc; const struct bhndb_hw *hw; const struct bhndb_hwcfg *hwcfg; const struct bhndb_hw_priority *hwprio; struct bhnd_erom_io *eio; bhnd_erom_t *erom; int error; sc = device_get_softc(dev); sc->dev = dev; sc->parent_dev = device_get_parent(dev); sc->bridge_core = *bridge_core; sc->chipid = *cid; if ((error = bhnd_service_registry_init(&sc->services))) return (error); BHNDB_LOCK_INIT(sc); erom = NULL; /* Find a matching bridge hardware configuration */ if ((error = bhndb_find_hwspec(sc, cores, ncores, &hw))) { device_printf(sc->dev, "unable to identify device, " " using generic bridge resource definitions\n"); hwcfg = BHNDB_BUS_GET_GENERIC_HWCFG(sc->parent_dev, dev); hw = NULL; } else { hwcfg = hw->cfg; } if (hw != NULL && (bootverbose || BHNDB_DEBUG(PRIO))) { device_printf(sc->dev, "%s resource configuration\n", hw->name); } /* Allocate bridge resource state using the discovered hardware * configuration */ sc->bus_res = bhndb_alloc_resources(sc->dev, sc->parent_dev, hwcfg); if (sc->bus_res == NULL) { device_printf(sc->dev, "failed to allocate bridge resource " "state\n"); error = ENOMEM; goto failed; } /* Add our bridged bus device */ sc->bus_dev = BUS_ADD_CHILD(dev, BHND_PROBE_BUS, "bhnd", -1); if (sc->bus_dev == NULL) { error = ENXIO; goto failed; } dinfo = device_get_ivars(sc->bus_dev); dinfo->addrspace = BHNDB_ADDRSPACE_BRIDGED; /* We can now use bhndb to perform bridging of SYS_RES_MEMORY resources; * we use this to instantiate an erom parser instance */ eio = bhnd_erom_iores_new(sc->bus_dev, 0); if ((erom = bhnd_erom_alloc(erom_class, cid, eio)) == NULL) { bhnd_erom_io_fini(eio); error = ENXIO; goto failed; } /* Populate our resource priority configuration */ hwprio = BHNDB_BUS_GET_HARDWARE_PRIO(sc->parent_dev, sc->dev); error = bhndb_init_region_cfg(sc, erom, sc->bus_res, cores, ncores, hwprio); if (error) { device_printf(sc->dev, "failed to initialize resource " "priority configuration: %d\n", error); goto failed; } /* Free our erom instance */ bhnd_erom_free(erom); erom = NULL; return (0); failed: BHNDB_LOCK_DESTROY(sc); if (sc->bus_res != NULL) bhndb_free_resources(sc->bus_res); if (erom != NULL) bhnd_erom_free(erom); bhnd_service_registry_fini(&sc->services); return (error); } /** * Default bhndb(4) implementation of DEVICE_DETACH(). * * This function detaches any child devices, and if successful, releases all * resources held by the bridge device. */ int bhndb_generic_detach(device_t dev) { struct bhndb_softc *sc; int error; sc = device_get_softc(dev); /* Detach children */ if ((error = bus_generic_detach(dev))) return (error); /* Delete children */ if ((error = device_delete_children(dev))) return (error); /* Clean up our service registry */ if ((error = bhnd_service_registry_fini(&sc->services))) return (error); /* Clean up our driver state. */ bhndb_free_resources(sc->bus_res); BHNDB_LOCK_DESTROY(sc); return (0); } /** * Default bhndb(4) implementation of DEVICE_SUSPEND(). * * This function calls bus_generic_suspend() (or implements equivalent * behavior). */ int bhndb_generic_suspend(device_t dev) { return (bus_generic_suspend(dev)); } /** * Default bhndb(4) implementation of DEVICE_RESUME(). * * This function calls bus_generic_resume() (or implements equivalent * behavior). */ int bhndb_generic_resume(device_t dev) { struct bhndb_softc *sc; struct bhndb_resources *bus_res; struct bhndb_dw_alloc *dwa; int error; sc = device_get_softc(dev); bus_res = sc->bus_res; /* Guarantee that all in-use dynamic register windows are mapped to * their previously configured target address. */ BHNDB_LOCK(sc); error = 0; for (size_t i = 0; i < bus_res->dwa_count; i++) { dwa = &bus_res->dw_alloc[i]; /* Skip regions that were not previously used */ if (bhndb_dw_is_free(bus_res, dwa) && dwa->target == 0x0) continue; /* Otherwise, ensure the register window is correct before * any children attempt MMIO */ error = BHNDB_SET_WINDOW_ADDR(dev, dwa->win, dwa->target); if (error) break; } BHNDB_UNLOCK(sc); /* Error restoring hardware state; children cannot be safely resumed */ if (error) { device_printf(dev, "Unable to restore hardware configuration; " "cannot resume: %d\n", error); return (error); } return (bus_generic_resume(dev)); } /** * Default implementation of BHNDB_SUSPEND_RESOURCE. */ static void bhndb_suspend_resource(device_t dev, device_t child, int type, struct resource *r) { struct bhndb_softc *sc; struct bhndb_dw_alloc *dwa; sc = device_get_softc(dev); /* Non-MMIO resources (e.g. IRQs) are handled solely by our parent */ if (type != SYS_RES_MEMORY) return; BHNDB_LOCK(sc); dwa = bhndb_dw_find_resource(sc->bus_res, r); if (dwa == NULL) { BHNDB_UNLOCK(sc); return; } if (BHNDB_DEBUG(PRIO)) device_printf(child, "suspend resource type=%d 0x%jx+0x%jx\n", type, rman_get_start(r), rman_get_size(r)); /* Release the resource's window reference */ bhndb_dw_release(sc->bus_res, dwa, r); BHNDB_UNLOCK(sc); } /** * Default implementation of BHNDB_RESUME_RESOURCE. */ static int bhndb_resume_resource(device_t dev, device_t child, int type, struct resource *r) { struct bhndb_softc *sc; sc = device_get_softc(dev); /* Non-MMIO resources (e.g. IRQs) are handled solely by our parent */ if (type != SYS_RES_MEMORY) return (0); /* Inactive resources don't require reallocation of bridge resources */ if (!(rman_get_flags(r) & RF_ACTIVE)) return (0); if (BHNDB_DEBUG(PRIO)) device_printf(child, "resume resource type=%d 0x%jx+0x%jx\n", type, rman_get_start(r), rman_get_size(r)); return (bhndb_try_activate_resource(sc, rman_get_device(r), type, rman_get_rid(r), r, NULL)); } /** * Default bhndb(4) implementation of BUS_READ_IVAR(). */ static int bhndb_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) { return (ENOENT); } /** * Default bhndb(4) implementation of BUS_WRITE_IVAR(). */ static int bhndb_write_ivar(device_t dev, device_t child, int index, uintptr_t value) { return (ENOENT); } /** * Return the address space for the given @p child device. */ bhndb_addrspace bhndb_get_addrspace(struct bhndb_softc *sc, device_t child) { struct bhndb_devinfo *dinfo; device_t imd_dev; /* Find the directly attached parent of the requesting device */ imd_dev = child; while (imd_dev != NULL && device_get_parent(imd_dev) != sc->dev) imd_dev = device_get_parent(imd_dev); if (imd_dev == NULL) panic("bhndb address space request for non-child device %s\n", device_get_nameunit(child)); dinfo = device_get_ivars(imd_dev); return (dinfo->addrspace); } /** * Return the rman instance for a given resource @p type, if any. * * @param sc The bhndb device state. * @param child The requesting child. * @param type The resource type (e.g. SYS_RES_MEMORY, SYS_RES_IRQ, ...) */ static struct rman * bhndb_get_rman(struct bhndb_softc *sc, device_t child, int type) { switch (bhndb_get_addrspace(sc, child)) { case BHNDB_ADDRSPACE_NATIVE: switch (type) { case SYS_RES_MEMORY: return (&sc->bus_res->ht_mem_rman); case SYS_RES_IRQ: return (NULL); default: return (NULL); } case BHNDB_ADDRSPACE_BRIDGED: switch (type) { case SYS_RES_MEMORY: return (&sc->bus_res->br_mem_rman); case SYS_RES_IRQ: return (&sc->bus_res->br_irq_rman); default: return (NULL); } } /* Quieten gcc */ return (NULL); } /** * Default implementation of BUS_ADD_CHILD() */ static device_t bhndb_add_child(device_t dev, u_int order, const char *name, int unit) { struct bhndb_devinfo *dinfo; device_t child; child = device_add_child_ordered(dev, order, name, unit); if (child == NULL) return (NULL); dinfo = malloc(sizeof(struct bhndb_devinfo), M_BHND, M_NOWAIT); if (dinfo == NULL) { device_delete_child(dev, child); return (NULL); } dinfo->addrspace = BHNDB_ADDRSPACE_NATIVE; resource_list_init(&dinfo->resources); device_set_ivars(child, dinfo); return (child); } /** * Default implementation of BUS_CHILD_DELETED(). */ static void bhndb_child_deleted(device_t dev, device_t child) { struct bhndb_devinfo *dinfo = device_get_ivars(child); if (dinfo != NULL) { resource_list_free(&dinfo->resources); free(dinfo, M_BHND); } device_set_ivars(child, NULL); } /** * Default implementation of BHNDB_GET_CHIPID(). */ static const struct bhnd_chipid * bhndb_get_chipid(device_t dev, device_t child) { struct bhndb_softc *sc = device_get_softc(dev); return (&sc->chipid); } /** * Default implementation of BHNDB_IS_CORE_DISABLED(). */ static bool bhndb_is_core_disabled(device_t dev, device_t child, struct bhnd_core_info *core) { struct bhndb_softc *sc; sc = device_get_softc(dev); /* Try to defer to the bhndb bus parent */ if (BHNDB_BUS_IS_CORE_DISABLED(sc->parent_dev, dev, core)) return (true); /* Otherwise, we treat bridge-capable cores as unpopulated if they're * not the configured host bridge */ if (BHND_DEVCLASS_SUPPORTS_HOSTB(bhnd_core_class(core))) return (!bhnd_cores_equal(core, &sc->bridge_core)); /* Assume the core is populated */ return (false); } /** * Default bhndb(4) implementation of BHNDB_GET_HOSTB_CORE(). * * This function uses a heuristic valid on all known PCI/PCIe/PCMCIA-bridged * bhnd(4) devices. */ static int bhndb_get_hostb_core(device_t dev, device_t child, struct bhnd_core_info *core) { struct bhndb_softc *sc = device_get_softc(dev); *core = sc->bridge_core; return (0); } /** * Default bhndb(4) implementation of BHND_BUS_GET_SERVICE_REGISTRY(). */ static struct bhnd_service_registry * bhndb_get_service_registry(device_t dev, device_t child) { struct bhndb_softc *sc = device_get_softc(dev); return (&sc->services); } /** * Default bhndb(4) implementation of BUS_ALLOC_RESOURCE(). */ static struct resource * bhndb_alloc_resource(device_t dev, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct bhndb_softc *sc; struct resource_list_entry *rle; struct resource *rv; struct rman *rm; int error; bool passthrough, isdefault; sc = device_get_softc(dev); passthrough = (device_get_parent(child) != dev); isdefault = RMAN_IS_DEFAULT_RANGE(start, end); rle = NULL; /* Fetch the resource manager */ rm = bhndb_get_rman(sc, child, type); if (rm == NULL) { /* Delegate to our parent device's bus; the requested * resource type isn't handled locally. */ return (BUS_ALLOC_RESOURCE(device_get_parent(sc->parent_dev), child, type, rid, start, end, count, flags)); } /* Populate defaults */ if (!passthrough && isdefault) { /* Fetch the resource list entry. */ rle = resource_list_find(BUS_GET_RESOURCE_LIST(dev, child), type, *rid); if (rle == NULL) { device_printf(dev, "default resource %#x type %d for child %s " "not found\n", *rid, type, device_get_nameunit(child)); return (NULL); } if (rle->res != NULL) { device_printf(dev, "resource entry %#x type %d for child %s is busy\n", *rid, type, device_get_nameunit(child)); return (NULL); } start = rle->start; end = rle->end; count = ulmax(count, rle->count); } /* Validate resource addresses */ if (start > end || count > ((end - start) + 1)) return (NULL); /* Make our reservation */ rv = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, child); if (rv == NULL) return (NULL); rman_set_rid(rv, *rid); /* Activate */ if (flags & RF_ACTIVE) { error = bus_activate_resource(child, type, *rid, rv); if (error) { device_printf(dev, "failed to activate entry %#x type %d for " "child %s: %d\n", *rid, type, device_get_nameunit(child), error); rman_release_resource(rv); return (NULL); } } /* Update child's resource list entry */ if (rle != NULL) { rle->res = rv; rle->start = rman_get_start(rv); rle->end = rman_get_end(rv); rle->count = rman_get_size(rv); } return (rv); } /** * Default bhndb(4) implementation of BUS_RELEASE_RESOURCE(). */ static int bhndb_release_resource(device_t dev, device_t child, int type, int rid, struct resource *r) { struct bhndb_softc *sc; struct resource_list_entry *rle; bool passthrough; int error; sc = device_get_softc(dev); passthrough = (device_get_parent(child) != dev); /* Delegate to our parent device's bus if the requested resource type * isn't handled locally. */ if (bhndb_get_rman(sc, child, type) == NULL) { return (BUS_RELEASE_RESOURCE(device_get_parent(sc->parent_dev), child, type, rid, r)); } /* Deactivate resources */ if (rman_get_flags(r) & RF_ACTIVE) { error = BUS_DEACTIVATE_RESOURCE(dev, child, type, rid, r); if (error) return (error); } if ((error = rman_release_resource(r))) return (error); if (!passthrough) { /* Clean resource list entry */ rle = resource_list_find(BUS_GET_RESOURCE_LIST(dev, child), type, rid); if (rle != NULL) rle->res = NULL; } return (0); } /** * Default bhndb(4) implementation of BUS_ADJUST_RESOURCE(). */ static int bhndb_adjust_resource(device_t dev, device_t child, int type, struct resource *r, rman_res_t start, rman_res_t end) { struct bhndb_softc *sc; struct rman *rm; rman_res_t mstart, mend; int error; sc = device_get_softc(dev); error = 0; /* Delegate to our parent device's bus if the requested resource type * isn't handled locally. */ rm = bhndb_get_rman(sc, child, type); if (rm == NULL) { return (BUS_ADJUST_RESOURCE(device_get_parent(sc->parent_dev), child, type, r, start, end)); } /* Verify basic constraints */ if (end <= start) return (EINVAL); if (!rman_is_region_manager(r, rm)) return (ENXIO); BHNDB_LOCK(sc); /* If not active, allow any range permitted by the resource manager */ if (!(rman_get_flags(r) & RF_ACTIVE)) goto done; /* Otherwise, the range is limited by the bridged resource mapping */ error = bhndb_find_resource_limits(sc->bus_res, type, r, &mstart, &mend); if (error) goto done; if (start < mstart || end > mend) { error = EINVAL; goto done; } /* Fall through */ done: if (!error) error = rman_adjust_resource(r, start, end); BHNDB_UNLOCK(sc); return (error); } /** * Initialize child resource @p r with a virtual address, tag, and handle * copied from @p parent, adjusted to contain only the range defined by * @p offsize and @p size. * * @param r The register to be initialized. * @param parent The parent bus resource that fully contains the subregion. * @param offset The subregion offset within @p parent. * @param size The subregion size. * @p r. */ static int bhndb_init_child_resource(struct resource *r, struct resource *parent, bhnd_size_t offset, bhnd_size_t size) { bus_space_handle_t bh, child_bh; bus_space_tag_t bt; uintptr_t vaddr; int error; /* Fetch the parent resource's real bus values */ vaddr = (uintptr_t) rman_get_virtual(parent); bt = rman_get_bustag(parent); bh = rman_get_bushandle(parent); /* Configure child resource with window-adjusted real bus values */ vaddr += offset; error = bus_space_subregion(bt, bh, offset, size, &child_bh); if (error) return (error); rman_set_virtual(r, (void *) vaddr); rman_set_bustag(r, bt); rman_set_bushandle(r, child_bh); return (0); } /** * Attempt activation of a fixed register window mapping for @p child. * * @param sc BHNDB device state. * @param region The static region definition capable of mapping @p r. * @param child A child requesting resource activation. * @param type Resource type. * @param rid Resource identifier. * @param r Resource to be activated. * * @retval 0 if @p r was activated successfully * @retval ENOENT if no fixed register window was found. * @retval non-zero if @p r could not be activated. */ static int bhndb_activate_static_region(struct bhndb_softc *sc, struct bhndb_region *region, device_t child, int type, int rid, struct resource *r) { struct resource *bridge_res; const struct bhndb_regwin *win; bhnd_size_t parent_offset; rman_res_t r_start, r_size; int error; win = region->static_regwin; KASSERT(win != NULL && BHNDB_REGWIN_T_IS_STATIC(win->win_type), ("can't activate non-static region")); r_start = rman_get_start(r); r_size = rman_get_size(r); /* Find the corresponding bridge resource */ bridge_res = bhndb_host_resource_for_regwin(sc->bus_res->res, win); if (bridge_res == NULL) return (ENXIO); /* Calculate subregion offset within the parent resource */ parent_offset = r_start - region->addr; parent_offset += win->win_offset; /* Configure resource with its real bus values. */ error = bhndb_init_child_resource(r, bridge_res, parent_offset, r_size); if (error) return (error); /* Mark active */ if ((error = rman_activate_resource(r))) return (error); return (0); } /** * Attempt to allocate/retain a dynamic register window for @p r, returning * the retained window. * * @param sc The bhndb driver state. * @param r The resource for which a window will be retained. */ static struct bhndb_dw_alloc * bhndb_retain_dynamic_window(struct bhndb_softc *sc, struct resource *r) { struct bhndb_dw_alloc *dwa; rman_res_t r_start, r_size; int error; BHNDB_LOCK_ASSERT(sc, MA_OWNED); r_start = rman_get_start(r); r_size = rman_get_size(r); /* Look for an existing dynamic window we can reference */ dwa = bhndb_dw_find_mapping(sc->bus_res, r_start, r_size); if (dwa != NULL) { if (bhndb_dw_retain(sc->bus_res, dwa, r) == 0) return (dwa); return (NULL); } /* Otherwise, try to reserve a free window */ dwa = bhndb_dw_next_free(sc->bus_res); if (dwa == NULL) { /* No free windows */ return (NULL); } /* Window must be large enough to map the entire resource */ if (dwa->win->win_size < rman_get_size(r)) return (NULL); /* Set the window target */ error = bhndb_dw_set_addr(sc->dev, sc->bus_res, dwa, rman_get_start(r), rman_get_size(r)); if (error) { device_printf(sc->dev, "dynamic window initialization " "for 0x%llx-0x%llx failed: %d\n", (unsigned long long) r_start, (unsigned long long) r_start + r_size - 1, error); return (NULL); } /* Add our reservation */ if (bhndb_dw_retain(sc->bus_res, dwa, r)) return (NULL); return (dwa); } /** * Activate a resource using any viable static or dynamic register window. * * @param sc The bhndb driver state. * @param child The child holding ownership of @p r. * @param type The type of the resource to be activated. * @param rid The resource ID of @p r. * @param r The resource to be activated * @param[out] indirect On error and if not NULL, will be set to 'true' if * the caller should instead use an indirect resource mapping. * * @retval 0 success * @retval non-zero activation failed. */ static int bhndb_try_activate_resource(struct bhndb_softc *sc, device_t child, int type, int rid, struct resource *r, bool *indirect) { struct bhndb_region *region; struct bhndb_dw_alloc *dwa; bhndb_priority_t dw_priority; rman_res_t r_start, r_size; rman_res_t parent_offset; int error; BHNDB_LOCK_ASSERT(sc, MA_NOTOWNED); if (indirect != NULL) *indirect = false; switch (type) { case SYS_RES_IRQ: /* IRQ resources are always directly mapped */ return (rman_activate_resource(r)); case SYS_RES_MEMORY: /* Handled below */ break; default: device_printf(sc->dev, "unsupported resource type %d\n", type); return (ENXIO); } /* Only MMIO resources can be mapped via register windows */ KASSERT(type == SYS_RES_MEMORY, ("invalid type: %d", type)); r_start = rman_get_start(r); r_size = rman_get_size(r); /* Activate native addrspace resources using the host address space */ if (bhndb_get_addrspace(sc, child) == BHNDB_ADDRSPACE_NATIVE) { struct resource *parent; /* Find the bridge resource referenced by the child */ parent = bhndb_host_resource_for_range(sc->bus_res->res, type, r_start, r_size); if (parent == NULL) { device_printf(sc->dev, "host resource not found " "for 0x%llx-0x%llx\n", (unsigned long long) r_start, (unsigned long long) r_start + r_size - 1); return (ENOENT); } /* Initialize child resource with the real bus values */ error = bhndb_init_child_resource(r, parent, r_start - rman_get_start(parent), r_size); if (error) return (error); /* Try to activate child resource */ return (rman_activate_resource(r)); } /* Default to low priority */ dw_priority = BHNDB_PRIORITY_LOW; /* Look for a bus region matching the resource's address range */ region = bhndb_find_resource_region(sc->bus_res, r_start, r_size); if (region != NULL) dw_priority = region->priority; /* Prefer static mappings over consuming a dynamic windows. */ if (region && region->static_regwin) { error = bhndb_activate_static_region(sc, region, child, type, rid, r); if (error) device_printf(sc->dev, "static window allocation " "for 0x%llx-0x%llx failed\n", (unsigned long long) r_start, (unsigned long long) r_start + r_size - 1); return (error); } /* A dynamic window will be required; is this resource high enough * priority to be reserved a dynamic window? */ if (dw_priority < sc->bus_res->min_prio) { if (indirect) *indirect = true; return (ENOMEM); } /* Find and retain a usable window */ BHNDB_LOCK(sc); { dwa = bhndb_retain_dynamic_window(sc, r); } BHNDB_UNLOCK(sc); if (dwa == NULL) { if (indirect) *indirect = true; return (ENOMEM); } /* Configure resource with its real bus values. */ parent_offset = dwa->win->win_offset; parent_offset += r_start - dwa->target; error = bhndb_init_child_resource(r, dwa->parent_res, parent_offset, dwa->win->win_size); if (error) goto failed; /* Mark active */ if ((error = rman_activate_resource(r))) goto failed; return (0); failed: /* Release our region allocation. */ BHNDB_LOCK(sc); bhndb_dw_release(sc->bus_res, dwa, r); BHNDB_UNLOCK(sc); return (error); } /** * Default bhndb(4) implementation of BUS_ACTIVATE_RESOURCE(). */ static int bhndb_activate_resource(device_t dev, device_t child, int type, int rid, struct resource *r) { struct bhndb_softc *sc = device_get_softc(dev); /* Delegate directly to our parent device's bus if the requested * resource type isn't handled locally. */ if (bhndb_get_rman(sc, child, type) == NULL) { return (BUS_ACTIVATE_RESOURCE(device_get_parent(sc->parent_dev), child, type, rid, r)); } return (bhndb_try_activate_resource(sc, child, type, rid, r, NULL)); } /** * Default bhndb(4) implementation of BUS_DEACTIVATE_RESOURCE(). */ static int bhndb_deactivate_resource(device_t dev, device_t child, int type, int rid, struct resource *r) { struct bhndb_dw_alloc *dwa; struct bhndb_softc *sc; struct rman *rm; int error; sc = device_get_softc(dev); /* Delegate directly to our parent device's bus if the requested * resource type isn't handled locally. */ rm = bhndb_get_rman(sc, child, type); if (rm == NULL) { return (BUS_DEACTIVATE_RESOURCE( device_get_parent(sc->parent_dev), child, type, rid, r)); } /* Mark inactive */ if ((error = rman_deactivate_resource(r))) return (error); switch (type) { case SYS_RES_IRQ: /* No bridge-level state to be freed */ return (0); case SYS_RES_MEMORY: /* Free any dynamic window allocation. */ if (bhndb_get_addrspace(sc, child) == BHNDB_ADDRSPACE_BRIDGED) { BHNDB_LOCK(sc); dwa = bhndb_dw_find_resource(sc->bus_res, r); if (dwa != NULL) bhndb_dw_release(sc->bus_res, dwa, r); BHNDB_UNLOCK(sc); } return (0); default: device_printf(dev, "unsupported resource type %d\n", type); return (ENXIO); } } /** * Default bhndb(4) implementation of BUS_GET_RESOURCE_LIST(). */ static struct resource_list * bhndb_get_resource_list(device_t dev, device_t child) { struct bhndb_devinfo *dinfo = device_get_ivars(child); return (&dinfo->resources); } /** * Default bhndb(4) implementation of BHND_BUS_ACTIVATE_RESOURCE(). * * For BHNDB_ADDRSPACE_NATIVE children, all resources are activated as direct * resources via BUS_ACTIVATE_RESOURCE(). * * For BHNDB_ADDRSPACE_BRIDGED children, the resource priority is determined, * and if possible, the resource is activated as a direct resource. For example, * depending on resource priority and bridge resource availability, this * function will attempt to activate SYS_RES_MEMORY resources using either a * static register window, a dynamic register window, or it will configure @p r * as an indirect resource -- in that order. */ static int bhndb_activate_bhnd_resource(device_t dev, device_t child, int type, int rid, struct bhnd_resource *r) { struct bhndb_softc *sc; struct bhndb_region *region; bhndb_priority_t r_prio; rman_res_t r_start, r_size; int error; bool indirect; KASSERT(!r->direct, ("direct flag set on inactive resource")); KASSERT(!(rman_get_flags(r->res) & RF_ACTIVE), ("RF_ACTIVE set on inactive resource")); sc = device_get_softc(dev); /* Delegate directly to BUS_ACTIVATE_RESOURCE() if the requested * resource type isn't handled locally. */ if (bhndb_get_rman(sc, child, type) == NULL) { error = BUS_ACTIVATE_RESOURCE(dev, child, type, rid, r->res); if (error == 0) r->direct = true; return (error); } r_start = rman_get_start(r->res); r_size = rman_get_size(r->res); /* Determine the resource priority of bridged resources, and skip direct * allocation if the priority is too low. */ if (bhndb_get_addrspace(sc, child) == BHNDB_ADDRSPACE_BRIDGED) { switch (type) { case SYS_RES_IRQ: /* IRQ resources are always direct */ break; case SYS_RES_MEMORY: region = bhndb_find_resource_region(sc->bus_res, r_start, r_size); if (region != NULL) r_prio = region->priority; else r_prio = BHNDB_PRIORITY_NONE; /* If less than the minimum dynamic window priority, * this resource should always be indirect. */ if (r_prio < sc->bus_res->min_prio) return (0); break; default: device_printf(dev, "unsupported resource type %d\n", type); return (ENXIO); } } /* Attempt direct activation */ error = bhndb_try_activate_resource(sc, child, type, rid, r->res, &indirect); if (!error) { r->direct = true; } else if (indirect) { /* The request was valid, but no viable register window is * available; indirection must be employed. */ error = 0; r->direct = false; } if (BHNDB_DEBUG(PRIO) && bhndb_get_addrspace(sc, child) == BHNDB_ADDRSPACE_BRIDGED) { device_printf(child, "activated 0x%llx-0x%llx as %s " "resource\n", (unsigned long long) r_start, (unsigned long long) r_start + r_size - 1, r->direct ? "direct" : "indirect"); } return (error); } /** * Default bhndb(4) implementation of BHND_BUS_DEACTIVATE_RESOURCE(). */ static int bhndb_deactivate_bhnd_resource(device_t dev, device_t child, int type, int rid, struct bhnd_resource *r) { int error; /* Indirect resources don't require activation */ if (!r->direct) return (0); KASSERT(rman_get_flags(r->res) & RF_ACTIVE, ("RF_ACTIVE not set on direct resource")); /* Perform deactivation */ error = BUS_DEACTIVATE_RESOURCE(dev, child, type, rid, r->res); if (!error) r->direct = false; return (error); } /** * Find the best available bridge resource allocation record capable of handling * bus I/O requests of @p size at @p addr. * * In order of preference, this function will either: * * - Configure and return a free allocation record * - Return an existing allocation record mapping the requested space, or * - Steal, configure, and return an in-use allocation record. * * Will panic if a usable record cannot be found. * * @param sc Bridge driver state. * @param addr The I/O target address. * @param size The size of the I/O operation to be performed at @p addr. * @param[out] borrowed Set to true if the allocation record was borrowed to * fulfill this request; the borrowed record maps the target address range, * and must not be modified. * @param[out] stolen Set to true if the allocation record was stolen to fulfill * this request. If a stolen allocation record is returned, * bhndb_io_resource_restore() must be called upon completion of the bus I/O * request. * @param[out] restore If the allocation record was stolen, this will be set * to the target that must be restored. */ static struct bhndb_dw_alloc * bhndb_io_resource_get_window(struct bhndb_softc *sc, bus_addr_t addr, bus_size_t size, bool *borrowed, bool *stolen, bus_addr_t *restore) { struct bhndb_resources *br; struct bhndb_dw_alloc *dwa; struct bhndb_region *region; BHNDB_LOCK_ASSERT(sc, MA_OWNED); br = sc->bus_res; *borrowed = false; *stolen = false; /* Try to fetch a free window */ if ((dwa = bhndb_dw_next_free(br)) != NULL) return (dwa); /* Search for an existing dynamic mapping of this address range. * Static regions are not searched, as a statically mapped * region would never be allocated as an indirect resource. */ for (size_t i = 0; i < br->dwa_count; i++) { const struct bhndb_regwin *win; dwa = &br->dw_alloc[i]; win = dwa->win; KASSERT(win->win_type == BHNDB_REGWIN_T_DYN, ("invalid register window type")); /* Verify the range */ if (addr < dwa->target) continue; if (addr + size > dwa->target + win->win_size) continue; /* Found */ *borrowed = true; return (dwa); } /* Try to steal a window; this should only be required on very early * PCI_V0 (BCM4318, etc) Wi-Fi chipsets */ region = bhndb_find_resource_region(br, addr, size); if (region == NULL) return (NULL); if ((region->alloc_flags & BHNDB_ALLOC_FULFILL_ON_OVERCOMMIT) == 0) return (NULL); /* Steal a window. This acquires our backing spinlock, disabling * interrupts; the spinlock will be released by * bhndb_dw_return_stolen() */ if ((dwa = bhndb_dw_steal(br, restore)) != NULL) { *stolen = true; return (dwa); } panic("register windows exhausted attempting to map 0x%llx-0x%llx\n", (unsigned long long) addr, (unsigned long long) addr+size-1); } /** * Return a borrowed reference to a bridge resource allocation record capable * of handling bus I/O requests of @p size at @p addr. * * This will either return a reference to an existing allocation record mapping * the requested space, or will configure and return a free allocation record. * * Will panic if a usable record cannot be found. * * @param sc Bridge driver state. * @param addr The I/O target address. * @param size The size of the I/O operation to be performed at @p addr. * @param[out] offset The offset within the returned resource at which * to perform the I/O request. * @param[out] stolen Set to true if the allocation record was stolen to fulfill * this request. If a stolen allocation record is returned, * bhndb_io_resource_restore() must be called upon completion of the bus I/O * request. * @param[out] restore If the allocation record was stolen, this will be set * to the target that must be restored. */ static inline struct bhndb_dw_alloc * bhndb_io_resource(struct bhndb_softc *sc, bus_addr_t addr, bus_size_t size, bus_size_t *offset, bool *stolen, bus_addr_t *restore) { struct bhndb_dw_alloc *dwa; bool borrowed; int error; BHNDB_LOCK_ASSERT(sc, MA_OWNED); dwa = bhndb_io_resource_get_window(sc, addr, size, &borrowed, stolen, restore); /* Adjust the window if the I/O request won't fit in the current * target range. */ if (addr < dwa->target || addr > dwa->target + dwa->win->win_size || (dwa->target + dwa->win->win_size) - addr < size) { /* Cannot modify target of borrowed windows */ if (borrowed) { panic("borrowed register window does not map expected " "range 0x%llx-0x%llx\n", (unsigned long long) addr, (unsigned long long) addr+size-1); } error = bhndb_dw_set_addr(sc->dev, sc->bus_res, dwa, addr, size); if (error) { panic("failed to set register window target mapping " "0x%llx-0x%llx\n", (unsigned long long) addr, (unsigned long long) addr+size-1); } } /* Calculate the offset and return */ *offset = (addr - dwa->target) + dwa->win->win_offset; return (dwa); } /* * BHND_BUS_(READ|WRITE_* implementations */ /* bhndb_bus_(read|write) common implementation */ #define BHNDB_IO_COMMON_SETUP(_io_size) \ struct bhndb_softc *sc; \ struct bhndb_dw_alloc *dwa; \ struct resource *io_res; \ bus_size_t io_offset; \ bus_addr_t restore; \ bool stolen; \ \ sc = device_get_softc(dev); \ \ BHNDB_LOCK(sc); \ dwa = bhndb_io_resource(sc, rman_get_start(r->res) + \ offset, _io_size, &io_offset, &stolen, &restore); \ io_res = dwa->parent_res; \ \ KASSERT(!r->direct, \ ("bhnd_bus slow path used for direct resource")); \ \ KASSERT(rman_get_flags(io_res) & RF_ACTIVE, \ ("i/o resource is not active")); #define BHNDB_IO_COMMON_TEARDOWN() \ if (stolen) { \ bhndb_dw_return_stolen(sc->dev, sc->bus_res, \ dwa, restore); \ } \ BHNDB_UNLOCK(sc); /* Defines a bhndb_bus_read_* method implementation */ #define BHNDB_IO_READ(_type, _name) \ static _type \ bhndb_bus_read_ ## _name (device_t dev, device_t child, \ struct bhnd_resource *r, bus_size_t offset) \ { \ _type v; \ BHNDB_IO_COMMON_SETUP(sizeof(_type)); \ v = bus_read_ ## _name (io_res, io_offset); \ BHNDB_IO_COMMON_TEARDOWN(); \ \ return (v); \ } /* Defines a bhndb_bus_write_* method implementation */ #define BHNDB_IO_WRITE(_type, _name) \ static void \ bhndb_bus_write_ ## _name (device_t dev, device_t child, \ struct bhnd_resource *r, bus_size_t offset, _type value) \ { \ BHNDB_IO_COMMON_SETUP(sizeof(_type)); \ bus_write_ ## _name (io_res, io_offset, value); \ BHNDB_IO_COMMON_TEARDOWN(); \ } /* Defines a bhndb_bus_(read|write|set)_(multi|region)_* method */ #define BHNDB_IO_MISC(_type, _ptr, _op, _size) \ static void \ bhndb_bus_ ## _op ## _ ## _size (device_t dev, \ device_t child, struct bhnd_resource *r, bus_size_t offset, \ _type _ptr datap, bus_size_t count) \ { \ BHNDB_IO_COMMON_SETUP(sizeof(_type) * count); \ bus_ ## _op ## _ ## _size (io_res, io_offset, \ datap, count); \ BHNDB_IO_COMMON_TEARDOWN(); \ } /* Defines a complete set of read/write methods */ #define BHNDB_IO_METHODS(_type, _size) \ BHNDB_IO_READ(_type, _size) \ BHNDB_IO_WRITE(_type, _size) \ \ BHNDB_IO_READ(_type, stream_ ## _size) \ BHNDB_IO_WRITE(_type, stream_ ## _size) \ \ BHNDB_IO_MISC(_type, *, read_multi, _size) \ BHNDB_IO_MISC(_type, *, write_multi, _size) \ \ BHNDB_IO_MISC(_type, *, read_multi_stream, _size) \ BHNDB_IO_MISC(_type, *, write_multi_stream, _size) \ \ BHNDB_IO_MISC(_type, , set_multi, _size) \ BHNDB_IO_MISC(_type, , set_region, _size) \ BHNDB_IO_MISC(_type, *, read_region, _size) \ BHNDB_IO_MISC(_type, *, write_region, _size) \ \ BHNDB_IO_MISC(_type, *, read_region_stream, _size) \ BHNDB_IO_MISC(_type, *, write_region_stream, _size) BHNDB_IO_METHODS(uint8_t, 1); BHNDB_IO_METHODS(uint16_t, 2); BHNDB_IO_METHODS(uint32_t, 4); /** * Default bhndb(4) implementation of BHND_BUS_BARRIER(). */ static void bhndb_bus_barrier(device_t dev, device_t child, struct bhnd_resource *r, bus_size_t offset, bus_size_t length, int flags) { BHNDB_IO_COMMON_SETUP(length); bus_barrier(io_res, io_offset + offset, length, flags); BHNDB_IO_COMMON_TEARDOWN(); } /** * Default bhndb(4) implementation of BHND_MAP_INTR(). */ static int bhndb_bhnd_map_intr(device_t dev, device_t child, u_int intr, rman_res_t *irq) { u_int ivec; int error; /* Is the intr valid? */ if (intr >= bhnd_get_intr_count(child)) return (EINVAL); /* Fetch the interrupt vector */ if ((error = bhnd_get_intr_ivec(child, intr, &ivec))) return (error); /* Map directly to the actual backplane interrupt vector */ *irq = ivec; return (0); } /** * Default bhndb(4) implementation of BHND_UNMAP_INTR(). */ static void bhndb_bhnd_unmap_intr(device_t dev, device_t child, rman_res_t irq) { /* No state to clean up */ } /** * Default bhndb(4) implementation of BUS_SETUP_INTR(). */ static int bhndb_setup_intr(device_t dev, device_t child, struct resource *r, int flags, driver_filter_t filter, driver_intr_t handler, void *arg, void **cookiep) { struct bhndb_softc *sc; struct bhndb_intr_isrc *isrc; struct bhndb_intr_handler *ih; int error; sc = device_get_softc(dev); /* Fetch the isrc */ if ((error = BHNDB_MAP_INTR_ISRC(dev, r, &isrc))) { device_printf(dev, "failed to fetch isrc: %d\n", error); return (error); } /* Allocate new ihandler entry */ ih = bhndb_alloc_intr_handler(child, r, isrc); if (ih == NULL) return (ENOMEM); /* Perform actual interrupt setup via the host isrc */ error = bus_setup_intr(isrc->is_owner, isrc->is_res, flags, filter, handler, arg, &ih->ih_cookiep); if (error) { bhndb_free_intr_handler(ih); return (error); } /* Add to our interrupt handler list */ BHNDB_LOCK(sc); bhndb_register_intr_handler(sc->bus_res, ih); BHNDB_UNLOCK(sc); /* Provide the interrupt handler entry as our cookiep value */ *cookiep = ih; return (0); } /** * Default bhndb(4) implementation of BUS_TEARDOWN_INTR(). */ static int bhndb_teardown_intr(device_t dev, device_t child, struct resource *r, void *cookiep) { struct bhndb_softc *sc; struct bhndb_intr_handler *ih; struct bhndb_intr_isrc *isrc; int error; sc = device_get_softc(dev); /* Locate and claim ownership of the interrupt handler entry */ BHNDB_LOCK(sc); ih = bhndb_find_intr_handler(sc->bus_res, cookiep); if (ih == NULL) { panic("%s requested teardown of invalid cookiep %p", device_get_nameunit(child), cookiep); } bhndb_deregister_intr_handler(sc->bus_res, ih); BHNDB_UNLOCK(sc); /* Perform actual interrupt teardown via the host isrc */ isrc = ih->ih_isrc; error = bus_teardown_intr(isrc->is_owner, isrc->is_res, ih->ih_cookiep); if (error) { /* If teardown fails, we need to reinsert the handler entry * to allow later teardown */ BHNDB_LOCK(sc); bhndb_register_intr_handler(sc->bus_res, ih); BHNDB_UNLOCK(sc); return (error); } /* Free the entry */ bhndb_free_intr_handler(ih); return (0); } /** * Default bhndb(4) implementation of BUS_BIND_INTR(). */ static int bhndb_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) { struct bhndb_softc *sc; struct bhndb_intr_handler *ih; struct bhndb_intr_isrc *isrc; sc = device_get_softc(dev); isrc = NULL; /* Fetch the isrc corresponding to the child IRQ resource */ BHNDB_LOCK(sc); STAILQ_FOREACH(ih, &sc->bus_res->bus_intrs, ih_link) { if (ih->ih_res == irq) { isrc = ih->ih_isrc; break; } } BHNDB_UNLOCK(sc); if (isrc == NULL) { panic("%s requested bind of invalid irq %#jx-%#jx", device_get_nameunit(child), rman_get_start(irq), rman_get_end(irq)); } /* Perform actual bind via the host isrc */ return (bus_bind_intr(isrc->is_owner, isrc->is_res, cpu)); } /** * Default bhndb(4) implementation of BUS_DESCRIBE_INTR(). */ static int bhndb_describe_intr(device_t dev, device_t child, struct resource *irq, void *cookie, const char *descr) { struct bhndb_softc *sc; struct bhndb_intr_handler *ih; struct bhndb_intr_isrc *isrc; sc = device_get_softc(dev); /* Locate the interrupt handler entry; the caller owns the handler * reference, and thus our entry is guaranteed to remain valid after * we drop out lock below. */ BHNDB_LOCK(sc); ih = bhndb_find_intr_handler(sc->bus_res, cookie); if (ih == NULL) { panic("%s requested invalid cookiep %p", device_get_nameunit(child), cookie); } isrc = ih->ih_isrc; BHNDB_UNLOCK(sc); /* Perform the actual request via the host isrc */ return (BUS_DESCRIBE_INTR(device_get_parent(isrc->is_owner), isrc->is_owner, isrc->is_res, ih->ih_cookiep, descr)); } /** * Default bhndb(4) implementation of BUS_CONFIG_INTR(). */ static int bhndb_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) { /* Unsupported */ return (ENXIO); } /** * Default bhndb(4) implementation of BUS_REMAP_INTR(). */ static int bhndb_remap_intr(device_t dev, device_t child, u_int irq) { /* Unsupported */ return (ENXIO); } /** * Default bhndb(4) implementation of BHND_BUS_GET_DMA_TRANSLATION(). */ static inline int bhndb_get_dma_translation(device_t dev, device_t child, u_int width, uint32_t flags, bus_dma_tag_t *dmat, struct bhnd_dma_translation *translation) { struct bhndb_softc *sc; const struct bhndb_hwcfg *hwcfg; const struct bhnd_dma_translation *match; bus_dma_tag_t match_dmat; bhnd_addr_t addr_mask, match_addr_mask; sc = device_get_softc(dev); hwcfg = sc->bus_res->cfg; /* Is DMA supported? */ if (sc->bus_res->res->dma_tags == NULL) return (ENODEV); /* Is the requested width supported? */ if (width > BHND_DMA_ADDR_32BIT) { /* Backplane must support 64-bit addressing */ if (!(sc->chipid.chip_caps & BHND_CAP_BP64)) width = BHND_DMA_ADDR_32BIT; } /* Find the best matching descriptor for the requested width */ addr_mask = BHND_DMA_ADDR_BITMASK(width); match = NULL; match_addr_mask = 0x0; match_dmat = NULL; for (size_t i = 0; i < sc->bus_res->res->num_dma_tags; i++) { const struct bhnd_dma_translation *dwin; bhnd_addr_t masked; dwin = &hwcfg->dma_translations[i]; /* The base address must be device addressable */ if ((dwin->base_addr & addr_mask) != dwin->base_addr) continue; /* The flags must match */ if ((dwin->flags & flags) != flags) continue; /* The window must cover at least part of our addressable * range */ masked = (dwin->addr_mask | dwin->addrext_mask) & addr_mask; if (masked == 0) continue; /* Is this a better match? */ if (match == NULL || masked > match_addr_mask) { match = dwin; match_addr_mask = masked; match_dmat = sc->bus_res->res->dma_tags[i]; } } if (match == NULL || match_addr_mask == 0) return (ENOENT); if (dmat != NULL) *dmat = match_dmat; if (translation != NULL) *translation = *match; return (0); } /** * Default bhndb(4) implementation of BUS_GET_DMA_TAG(). */ static bus_dma_tag_t bhndb_get_dma_tag(device_t dev, device_t child) { struct bhndb_softc *sc = device_get_softc(dev); /* * A bridge may have multiple DMA translation descriptors, each with * their own incompatible restrictions; drivers should in general call * BHND_BUS_GET_DMA_TRANSLATION() to fetch both the best available DMA * translation, and its corresponding DMA tag. * * Child drivers that do not use BHND_BUS_GET_DMA_TRANSLATION() are * responsible for creating their own restricted DMA tag; since we * cannot do this for them in BUS_GET_DMA_TAG(), we simply return the * bridge parent's DMA tag directly; */ return (bus_get_dma_tag(sc->parent_dev)); } static device_method_t bhndb_methods[] = { /* Device interface */ \ DEVMETHOD(device_probe, bhndb_generic_probe), DEVMETHOD(device_detach, bhndb_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bhndb_generic_suspend), DEVMETHOD(device_resume, bhndb_generic_resume), /* Bus interface */ DEVMETHOD(bus_probe_nomatch, bhndb_probe_nomatch), DEVMETHOD(bus_print_child, bhndb_print_child), DEVMETHOD(bus_child_location, bhndb_child_location), DEVMETHOD(bus_add_child, bhndb_add_child), DEVMETHOD(bus_child_deleted, bhndb_child_deleted), DEVMETHOD(bus_alloc_resource, bhndb_alloc_resource), DEVMETHOD(bus_release_resource, bhndb_release_resource), DEVMETHOD(bus_activate_resource, bhndb_activate_resource), DEVMETHOD(bus_deactivate_resource, bhndb_deactivate_resource), DEVMETHOD(bus_setup_intr, bhndb_setup_intr), DEVMETHOD(bus_teardown_intr, bhndb_teardown_intr), DEVMETHOD(bus_config_intr, bhndb_config_intr), DEVMETHOD(bus_bind_intr, bhndb_bind_intr), DEVMETHOD(bus_describe_intr, bhndb_describe_intr), DEVMETHOD(bus_remap_intr, bhndb_remap_intr), DEVMETHOD(bus_get_dma_tag, bhndb_get_dma_tag), DEVMETHOD(bus_adjust_resource, bhndb_adjust_resource), DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource), DEVMETHOD(bus_get_resource_list, bhndb_get_resource_list), DEVMETHOD(bus_read_ivar, bhndb_read_ivar), DEVMETHOD(bus_write_ivar, bhndb_write_ivar), /* BHNDB interface */ DEVMETHOD(bhndb_get_chipid, bhndb_get_chipid), DEVMETHOD(bhndb_is_core_disabled, bhndb_is_core_disabled), DEVMETHOD(bhndb_get_hostb_core, bhndb_get_hostb_core), DEVMETHOD(bhndb_suspend_resource, bhndb_suspend_resource), DEVMETHOD(bhndb_resume_resource, bhndb_resume_resource), /* BHND interface */ DEVMETHOD(bhnd_bus_get_chipid, bhndb_get_chipid), DEVMETHOD(bhnd_bus_activate_resource, bhndb_activate_bhnd_resource), DEVMETHOD(bhnd_bus_deactivate_resource, bhndb_deactivate_bhnd_resource), DEVMETHOD(bhnd_bus_get_nvram_var, bhnd_bus_generic_get_nvram_var), DEVMETHOD(bhnd_bus_map_intr, bhndb_bhnd_map_intr), DEVMETHOD(bhnd_bus_unmap_intr, bhndb_bhnd_unmap_intr), DEVMETHOD(bhnd_bus_get_dma_translation, bhndb_get_dma_translation), DEVMETHOD(bhnd_bus_get_service_registry,bhndb_get_service_registry), DEVMETHOD(bhnd_bus_register_provider, bhnd_bus_generic_sr_register_provider), DEVMETHOD(bhnd_bus_deregister_provider, bhnd_bus_generic_sr_deregister_provider), DEVMETHOD(bhnd_bus_retain_provider, bhnd_bus_generic_sr_retain_provider), DEVMETHOD(bhnd_bus_release_provider, bhnd_bus_generic_sr_release_provider), DEVMETHOD(bhnd_bus_read_1, bhndb_bus_read_1), DEVMETHOD(bhnd_bus_read_2, bhndb_bus_read_2), DEVMETHOD(bhnd_bus_read_4, bhndb_bus_read_4), DEVMETHOD(bhnd_bus_write_1, bhndb_bus_write_1), DEVMETHOD(bhnd_bus_write_2, bhndb_bus_write_2), DEVMETHOD(bhnd_bus_write_4, bhndb_bus_write_4), DEVMETHOD(bhnd_bus_read_stream_1, bhndb_bus_read_stream_1), DEVMETHOD(bhnd_bus_read_stream_2, bhndb_bus_read_stream_2), DEVMETHOD(bhnd_bus_read_stream_4, bhndb_bus_read_stream_4), DEVMETHOD(bhnd_bus_write_stream_1, bhndb_bus_write_stream_1), DEVMETHOD(bhnd_bus_write_stream_2, bhndb_bus_write_stream_2), DEVMETHOD(bhnd_bus_write_stream_4, bhndb_bus_write_stream_4), DEVMETHOD(bhnd_bus_read_multi_1, bhndb_bus_read_multi_1), DEVMETHOD(bhnd_bus_read_multi_2, bhndb_bus_read_multi_2), DEVMETHOD(bhnd_bus_read_multi_4, bhndb_bus_read_multi_4), DEVMETHOD(bhnd_bus_write_multi_1, bhndb_bus_write_multi_1), DEVMETHOD(bhnd_bus_write_multi_2, bhndb_bus_write_multi_2), DEVMETHOD(bhnd_bus_write_multi_4, bhndb_bus_write_multi_4), DEVMETHOD(bhnd_bus_read_multi_stream_1, bhndb_bus_read_multi_stream_1), DEVMETHOD(bhnd_bus_read_multi_stream_2, bhndb_bus_read_multi_stream_2), DEVMETHOD(bhnd_bus_read_multi_stream_4, bhndb_bus_read_multi_stream_4), DEVMETHOD(bhnd_bus_write_multi_stream_1,bhndb_bus_write_multi_stream_1), DEVMETHOD(bhnd_bus_write_multi_stream_2,bhndb_bus_write_multi_stream_2), DEVMETHOD(bhnd_bus_write_multi_stream_4,bhndb_bus_write_multi_stream_4), DEVMETHOD(bhnd_bus_set_multi_1, bhndb_bus_set_multi_1), DEVMETHOD(bhnd_bus_set_multi_2, bhndb_bus_set_multi_2), DEVMETHOD(bhnd_bus_set_multi_4, bhndb_bus_set_multi_4), DEVMETHOD(bhnd_bus_set_region_1, bhndb_bus_set_region_1), DEVMETHOD(bhnd_bus_set_region_2, bhndb_bus_set_region_2), DEVMETHOD(bhnd_bus_set_region_4, bhndb_bus_set_region_4), DEVMETHOD(bhnd_bus_read_region_1, bhndb_bus_read_region_1), DEVMETHOD(bhnd_bus_read_region_2, bhndb_bus_read_region_2), DEVMETHOD(bhnd_bus_read_region_4, bhndb_bus_read_region_4), DEVMETHOD(bhnd_bus_write_region_1, bhndb_bus_write_region_1), DEVMETHOD(bhnd_bus_write_region_2, bhndb_bus_write_region_2), DEVMETHOD(bhnd_bus_write_region_4, bhndb_bus_write_region_4), DEVMETHOD(bhnd_bus_read_region_stream_1,bhndb_bus_read_region_stream_1), DEVMETHOD(bhnd_bus_read_region_stream_2,bhndb_bus_read_region_stream_2), DEVMETHOD(bhnd_bus_read_region_stream_4,bhndb_bus_read_region_stream_4), DEVMETHOD(bhnd_bus_write_region_stream_1,bhndb_bus_write_region_stream_1), DEVMETHOD(bhnd_bus_write_region_stream_2,bhndb_bus_write_region_stream_2), DEVMETHOD(bhnd_bus_write_region_stream_4,bhndb_bus_write_region_stream_4), DEVMETHOD(bhnd_bus_barrier, bhndb_bus_barrier), DEVMETHOD_END }; DEFINE_CLASS_0(bhndb, bhndb_driver, bhndb_methods, sizeof(struct bhndb_softc)); MODULE_VERSION(bhndb, 1); MODULE_DEPEND(bhndb, bhnd, 1, 1, 1);