/* * Copyright 1998 Massachusetts Institute of Technology * Copyright (c) 2008 The DragonFly Project. * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that both the above copyright notice and this * permission notice appear in all copies, that both the above * copyright notice and this permission notice appear in all * supporting documentation, and that the name of M.I.T. not be used * in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. M.I.T. makes * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied * warranty. * * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT * SHALL M.I.T. 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. * * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $ */ /* * This code implements a `root nexus' for Intel Architecture * machines. The function of the root nexus is to serve as an * attachment point for both processors and buses, and to manage * resources which are common to all of them. In particular, * this code implements the core resource managers for interrupt * requests, DMA requests (which rightfully should be a part of the * ISA code but it's easier to do it here for now), I/O port addresses, * and I/O memory address space. */ #include "use_pci.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NPCI > 0 #include "pcib_if.h" #endif #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel") static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); struct nexus_device { struct resource_list nx_resources; int nx_pcibus; }; #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) static struct rman irq_rman[MAXCPU], drq_rman, port_rman, mem_rman; static int nexus_probe(device_t); static int nexus_attach(device_t); static int nexus_print_all_resources(device_t dev); static int nexus_print_child(device_t, device_t); static device_t nexus_add_child(device_t bus, device_t parent, int order, const char *name, int unit); static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, u_long, u_long, u_long, u_int, int); static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); static int nexus_write_ivar(device_t, device_t, int, uintptr_t); static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static int nexus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int nexus_release_resource(device_t, device_t, int, int, struct resource *); static int nexus_config_intr(device_t, device_t, int, enum intr_trigger, enum intr_polarity); static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, void (*)(void *), void *, void **, lwkt_serialize_t, const char *); static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long, int); static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *); static void nexus_delete_resource(device_t, device_t, int, int); #if NPCI > 0 static int nexus_alloc_msi(device_t, device_t, int, int, int *, int); static int nexus_release_msi(device_t, device_t, int, int *, int); static int nexus_map_msi(device_t, device_t, int, uint64_t *, uint32_t *, int); static int nexus_alloc_msix(device_t, device_t, int *, int); static int nexus_release_msix(device_t, device_t, int, int); #endif /* * The device_identify method will cause nexus to automatically associate * and attach to the root bus. */ static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_identify, bus_generic_identify), DEVMETHOD(device_probe, nexus_probe), DEVMETHOD(device_attach, nexus_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_print_child, nexus_print_child), DEVMETHOD(bus_add_child, nexus_add_child), DEVMETHOD(bus_read_ivar, nexus_read_ivar), DEVMETHOD(bus_write_ivar, nexus_write_ivar), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_release_resource, nexus_release_resource), DEVMETHOD(bus_activate_resource, nexus_activate_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), DEVMETHOD(bus_config_intr, nexus_config_intr), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_set_resource, nexus_set_resource), DEVMETHOD(bus_get_resource, nexus_get_resource), DEVMETHOD(bus_delete_resource, nexus_delete_resource), #if NPCI > 0 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi), DEVMETHOD(pcib_release_msi, nexus_release_msi), DEVMETHOD(pcib_map_msi, nexus_map_msi), DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix), DEVMETHOD(pcib_release_msix, nexus_release_msix), #endif DEVMETHOD_END }; static driver_t nexus_driver = { "nexus", nexus_methods, 1, /* no softc */ }; static devclass_t nexus_devclass; DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, NULL, NULL); static int nexus_probe(device_t dev) { int cpuid; device_quiet(dev); /* suppress attach message for neatness */ for (cpuid = 0; cpuid < ncpus; ++cpuid) { struct rman *rm = &irq_rman[cpuid]; rm->rm_start = 0; rm->rm_end = IDT_HWI_VECTORS - 1; rm->rm_type = RMAN_ARRAY; rm->rm_descr = "Interrupt request lines"; if (rman_init(rm, cpuid)) panic("%s rman_init", __func__); MachIntrABI.rman_setup(rm); } /* * ISA DMA on PCI systems is implemented in the ISA part of each * PCI->ISA bridge and the channels can be duplicated if there are * multiple bridges. (eg: laptops with docking stations) */ drq_rman.rm_start = 0; drq_rman.rm_end = 7; drq_rman.rm_type = RMAN_ARRAY; drq_rman.rm_descr = "DMA request lines"; /* XXX drq 0 not available on some machines */ if (rman_init(&drq_rman, -1) || rman_manage_region(&drq_rman, drq_rman.rm_start, drq_rman.rm_end)) panic("%s drq_rman", __func__); /* * However, IO ports and Memory truely are global at this level, * as are APIC interrupts (however many IO APICS there turn out * to be on large systems..) */ port_rman.rm_start = 0; port_rman.rm_end = 0xffff; port_rman.rm_type = RMAN_ARRAY; port_rman.rm_descr = "I/O ports"; if (rman_init(&port_rman, -1) || rman_manage_region(&port_rman, 0, 0xffff)) panic("%s port_rman", __func__); mem_rman.rm_start = 0; mem_rman.rm_end = ~0u; mem_rman.rm_type = RMAN_ARRAY; mem_rman.rm_descr = "I/O memory addresses"; if (rman_init(&mem_rman, -1) || rman_manage_region(&mem_rman, 0, ~0)) panic("%s mem_rman", __func__); return bus_generic_probe(dev); } static int nexus_attach(device_t dev) { device_t child; /* * First, let our child driver's identify any child devices that * they can find. Once that is done attach any devices that we * found. */ #if 0 /* FUTURE */ bus_generic_probe(dev); #endif bus_generic_attach(dev); /* * And if we didn't see ISA on a pci bridge, create a * connection point now so it shows up "on motherboard". */ if (!devclass_get_device(devclass_find("isa"), 0)) { child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0); if (child == NULL) panic("%s isa", __func__); device_probe_and_attach(child); } return 0; } static int nexus_print_all_resources(device_t dev) { struct nexus_device *ndev = DEVTONX(dev); struct resource_list *rl = &ndev->nx_resources; int retval = 0; if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1) retval += kprintf(" at"); retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); return retval; } static int nexus_print_child(device_t bus, device_t child) { struct nexus_device *ndev = DEVTONX(child); int retval = 0; retval += bus_print_child_header(bus, child); retval += nexus_print_all_resources(child); if (ndev->nx_pcibus != -1) retval += kprintf(" pcibus %d", ndev->nx_pcibus); retval += kprintf(" on motherboard\n"); return (retval); } static device_t nexus_add_child(device_t bus, device_t parent, int order, const char *name, int unit) { device_t child; struct nexus_device *ndev; ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO); resource_list_init(&ndev->nx_resources); ndev->nx_pcibus = -1; child = device_add_child_ordered(parent, order, name, unit); /* should we free this in nexus_child_detached? */ device_set_ivars(child, ndev); return(child); } static int nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct nexus_device *ndev = DEVTONX(child); switch (which) { case NEXUS_IVAR_PCIBUS: *result = ndev->nx_pcibus; break; default: return ENOENT; } return 0; } static int nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct nexus_device *ndev = DEVTONX(child); switch (which) { case NEXUS_IVAR_PCIBUS: ndev->nx_pcibus = value; break; default: return ENOENT; } return 0; } /* * Allocate a resource on behalf of child. NB: child is usually going to be a * child of one of our descendants, not a direct child of nexus0. * (Exceptions include npx.) */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid) { struct nexus_device *ndev = DEVTONX(child); struct resource *rv; struct resource_list_entry *rle; struct rman *rm; int needactivate = flags & RF_ACTIVE; /* * If this is an allocation of the "default" range for a given RID, and * we know what the resources for this device are (ie. they aren't maintained * by a child bus), then work out the start/end values. */ if ((start == 0UL) && (end == ~0UL) && (count == 1)) { if (ndev == NULL) return(NULL); rle = resource_list_find(&ndev->nx_resources, type, *rid); if (rle == NULL) return(NULL); start = rle->start; end = rle->end; count = rle->count; cpuid = rle->cpuid; } flags &= ~RF_ACTIVE; switch (type) { case SYS_RES_IRQ: KASSERT(cpuid >= 0 && cpuid < ncpus, ("nexus invalid cpuid: %d", cpuid)); rm = &irq_rman[cpuid]; break; case SYS_RES_DRQ: rm = &drq_rman; break; case SYS_RES_IOPORT: rm = &port_rman; break; case SYS_RES_MEMORY: rm = &mem_rman; break; default: return 0; } rv = rman_reserve_resource(rm, start, end, count, flags, child); if (rv == NULL) return 0; rman_set_rid(rv, *rid); if (type == SYS_RES_MEMORY) { rman_set_bustag(rv, X86_64_BUS_SPACE_MEM); } else if (type == SYS_RES_IOPORT) { rman_set_bustag(rv, X86_64_BUS_SPACE_IO); rman_set_bushandle(rv, rv->r_start); } if (needactivate) { if (bus_activate_resource(child, type, *rid, rv)) { rman_release_resource(rv); return 0; } } return rv; } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { /* * If this is a memory resource, map it into the kernel. */ if (rman_get_bustag(r) == X86_64_BUS_SPACE_MEM) { caddr_t vaddr = 0; if (rman_get_end(r) < 1024 * 1024) { /* * The first 1Mb is mapped at KERNBASE. */ vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r)); } else { u_int64_t paddr; u_int64_t psize; u_int32_t poffs; paddr = rman_get_start(r); psize = rman_get_size(r); poffs = paddr - trunc_page(paddr); vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs; } rman_set_virtual(r, vaddr); /* IBM-PC: the type of bus_space_handle_t is u_int */ rman_set_bushandle(r, (bus_space_handle_t) vaddr); } return (rman_activate_resource(r)); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { /* * If this is a memory resource, unmap it. */ if ((rman_get_bustag(r) == X86_64_BUS_SPACE_MEM) && (rman_get_end(r) >= 1024 * 1024)) { u_int32_t psize; psize = rman_get_size(r); pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); } return (rman_deactivate_resource(r)); } static int nexus_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { if (rman_get_flags(r) & RF_ACTIVE) { int error = bus_deactivate_resource(child, type, rid, r); if (error) return error; } return (rman_release_resource(r)); } static int nexus_config_intr(device_t bus, device_t chile, int irq, enum intr_trigger trig, enum intr_polarity pola) { machintr_legacy_intr_config(irq, trig, pola); return 0; } /* * Currently this uses the really grody interface from kern/kern_intr.c * (which really doesn't belong in kern/anything.c). Eventually, all of * the code in kern_intr.c and machdep_intr.c should get moved here, since * this is going to be the official interface. */ static int nexus_setup_intr(device_t bus, device_t child, struct resource *irq, int flags, void (*ihand)(void *), void *arg, void **cookiep, lwkt_serialize_t serializer, const char *desc) { int error, icflags; /* somebody tried to setup an irq that failed to allocate! */ if (irq == NULL) panic("%s: NULL irq resource!", __func__); *cookiep = NULL; icflags = flags; if ((irq->r_flags & RF_SHAREABLE) == 0) icflags |= INTR_EXCL; /* * We depend here on rman_activate_resource() being idempotent. */ error = rman_activate_resource(irq); if (error) return (error); /* Use device name, if description is not specified */ if (desc == NULL) desc = device_get_nameunit(child); /* * XXX cast the interrupt handler function to an inthand2_t. The * difference is that an additional frame argument is passed which * we do not currently want to expose the BUS subsystem to. */ *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg, desc, serializer, icflags, rman_get_cpuid(irq)); if (*cookiep == NULL) error = EINVAL; return (error); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) { if (ih) { unregister_int(ih, rman_get_cpuid(r)); return (0); } return(-1); } static int nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count, int cpuid) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; /* XXX this should return a success/failure indicator */ resource_list_add(rl, type, rid, start, start + count - 1, count, cpuid); return(0); } static int nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; struct resource_list_entry *rle; rle = resource_list_find(rl, type, rid); device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", type, rid, startp, countp, rle); if (!rle) return(ENOENT); if (startp) *startp = rle->start; if (countp) *countp = rle->count; return(0); } static void nexus_delete_resource(device_t dev, device_t child, int type, int rid) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; resource_list_delete(rl, type, rid); } #if NPCI > 0 static int nexus_alloc_msi(device_t dev, device_t child, int count, int maxcount, int *irqs, int cpuid) { if (!lapic_enable) return ENODEV; return MachIntrABI.msi_alloc(irqs, count, cpuid); } static int nexus_release_msi(device_t dev, device_t child, int count, int *irqs, int cpuid) { KKASSERT(lapic_enable); MachIntrABI.msi_release(irqs, count, cpuid); return 0; } static int nexus_map_msi(device_t dev, device_t child, int irq, uint64_t *addr, uint32_t *data, int cpuid) { KKASSERT(lapic_enable); MachIntrABI.msi_map(irq, addr, data, cpuid); return 0; } static int nexus_alloc_msix(device_t dev, device_t child, int *irq, int cpuid) { if (!lapic_enable) return ENODEV; return MachIntrABI.msix_alloc(irq, cpuid); } static int nexus_release_msix(device_t dev, device_t child, int irq, int cpuid) { KKASSERT(lapic_enable); MachIntrABI.msix_release(irq, cpuid); return 0; } #endif /* Placeholder for system RAM. */ static void ram_identify(driver_t *driver, device_t parent) { if (resource_disabled("ram", 0)) return; if (BUS_ADD_CHILD(parent, parent, 0, "ram", 0) == NULL) panic("%s", __func__); } static int ram_probe(device_t dev) { device_quiet(dev); device_set_desc(dev, "System RAM"); return (0); } static int ram_attach(device_t dev) { struct bios_smap *smapbase, *smap, *smapend; struct resource *res; vm_phystable_t *p; caddr_t kmdp; uint32_t smapsize; int error, rid; device_quiet(dev); device_set_desc(dev, "System RAM"); /* Retrieve the system memory map from the loader. */ kmdp = preload_search_by_type("elf kernel"); if (kmdp == NULL) kmdp = preload_search_by_type(ELF_KERN_STR); if (kmdp != NULL) smapbase = (struct bios_smap *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_SMAP); else smapbase = NULL; if (smapbase != NULL) { smapsize = *((u_int32_t *)smapbase - 1); smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize); rid = 0; for (smap = smapbase; smap < smapend; smap++) { if (smap->type != SMAP_TYPE_MEMORY || smap->length == 0) continue; error = bus_set_resource(dev, SYS_RES_MEMORY, rid, smap->base, smap->length, -1); if (error) panic("%s: resource %d failed set with %d", __func__, rid, error); res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); if (res == NULL) { panic("%s: resource %d failed to " "attach 0x%016jx/%jd", __func__, rid, (intmax_t)smap->base, (intmax_t)smap->length); } rid++; } return (0); } /* * If the system map is not available, fall back to using * dump_avail[]. We use the dump_avail[] array rather than * phys_avail[] for the memory map as phys_avail[] contains * holes for kernel memory, page 0, the message buffer, and * the dcons buffer. We test the end address in the loop * instead of the start since the start address for the first * segment is 0. */ for (rid = 0, p = &dump_avail[0]; p->phys_end; ++rid, ++p) { error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p->phys_beg, p->phys_end - p->phys_beg, -1); if (error) panic("%s: resource %d failed set with %d", __func__, rid, error); res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0); if (res == NULL) panic("%s: resource %d failed to attach", __func__, rid); } return (0); } static device_method_t ram_methods[] = { /* Device interface */ DEVMETHOD(device_identify, ram_identify), DEVMETHOD(device_probe, ram_probe), DEVMETHOD(device_attach, ram_attach), { 0, 0 } }; static driver_t ram_driver = { "ram", ram_methods, 1, /* no softc */ }; static devclass_t ram_devclass; DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, NULL, NULL);