nexus.c revision 86227
186227Stmm/* 286227Stmm * Copyright 1998 Massachusetts Institute of Technology 386227Stmm * 486227Stmm * Permission to use, copy, modify, and distribute this software and 586227Stmm * its documentation for any purpose and without fee is hereby 686227Stmm * granted, provided that both the above copyright notice and this 786227Stmm * permission notice appear in all copies, that both the above 886227Stmm * copyright notice and this permission notice appear in all 986227Stmm * supporting documentation, and that the name of M.I.T. not be used 1086227Stmm * in advertising or publicity pertaining to distribution of the 1186227Stmm * software without specific, written prior permission. M.I.T. makes 1286227Stmm * no representations about the suitability of this software for any 1386227Stmm * purpose. It is provided "as is" without express or implied 1486227Stmm * warranty. 1586227Stmm * 1686227Stmm * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 1786227Stmm * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 1886227Stmm * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 1986227Stmm * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 2086227Stmm * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2186227Stmm * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2286227Stmm * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 2386227Stmm * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 2486227Stmm * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 2586227Stmm * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 2686227Stmm * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2786227Stmm * SUCH DAMAGE. 2886227Stmm */ 2986227Stmm/*- 3086227Stmm * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. All rights reserved. 3186227Stmm * 3286227Stmm * Redistribution and use in source and binary forms, with or without 3386227Stmm * modification, are permitted provided that the following conditions 3486227Stmm * are met: 3586227Stmm * 1. Redistributions of source code must retain the above copyright 3686227Stmm * notice, this list of conditions and the following disclaimer. 3786227Stmm * 2. Redistributions in binary form must reproduce the above copyright 3886227Stmm * notice, this list of conditions and the following disclaimer in the 3986227Stmm * documentation and/or other materials provided with the distribution. 4086227Stmm * 4186227Stmm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 4286227Stmm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4386227Stmm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4486227Stmm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4586227Stmm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4686227Stmm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4786227Stmm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4886227Stmm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4986227Stmm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5086227Stmm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5186227Stmm * SUCH DAMAGE. 5286227Stmm * 5386227Stmm * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09 5486227Stmm * 5586227Stmm * $FreeBSD: head/sys/sparc64/sparc64/nexus.c 86227 2001-11-09 20:01:25Z tmm $ 5686227Stmm */ 5786227Stmm 5886227Stmm#include <sys/param.h> 5986227Stmm#include <sys/systm.h> 6086227Stmm#include <sys/bus.h> 6186227Stmm#include <sys/cons.h> 6286227Stmm#include <sys/kernel.h> 6386227Stmm#include <sys/malloc.h> 6486227Stmm 6586227Stmm#include <dev/ofw/openfirm.h> 6686227Stmm 6786227Stmm#include <machine/bus.h> 6886227Stmm#include <machine/frame.h> 6986227Stmm#include <machine/intr_machdep.h> 7086227Stmm#include <machine/nexusvar.h> 7186227Stmm#include <machine/resource.h> 7286227Stmm 7386227Stmm#include <sys/rman.h> 7486227Stmm 7586227Stmm/* 7686227Stmm * The nexus (which is a pseudo-bus actually) iterates over the nodes that 7786227Stmm * hang from the OpenFirmware root node and add them as devices to this bus 7886227Stmm * (except some special nodes which are excluded) so that drivers can be 7986227Stmm * attached to them. This saves lots of detection work. 8086227Stmm * Usually, all devices and bridges that are attached to the UltraSparc UPA 8186227Stmm * bus will show up here, plus some pseudo-nodes which are excluded. 8286227Stmm * For now, the only node that gets used is probably the pci bus one. 8386227Stmm * 8486227Stmm * Additionally, interrupt setup/teardown and some resource management are 8586227Stmm * done at this level. 8686227Stmm * 8786227Stmm * Maybe this code should get into dev/ofw to some extent, as some of it should 8886227Stmm * work for all OpenFirmware based machines... 8986227Stmm */ 9086227Stmm 9186227Stmmstatic MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information"); 9286227Stmm 9386227Stmmstruct nexus_devinfo { 9486227Stmm phandle_t ndi_node; 9586227Stmm /* Some common properties. */ 9686227Stmm char *ndi_name; 9786227Stmm char *ndi_device_type; 9886227Stmm char *ndi_model; 9986227Stmm struct ofw_nexus_reg *ndi_reg; 10086227Stmm int ndi_nreg; 10186227Stmm u_int *ndi_interrupts; 10286227Stmm int ndi_ninterrupts; 10386227Stmm bus_space_tag_t ndi_bustag; 10486227Stmm bus_dma_tag_t ndi_dmatag; 10586227Stmm}; 10686227Stmm 10786227Stmmstatic int nexus_probe(device_t); 10886227Stmmstatic void nexus_probe_nomatch(device_t, device_t); 10986227Stmmstatic int nexus_read_ivar(device_t, device_t, int, uintptr_t *); 11086227Stmmstatic int nexus_write_ivar(device_t, device_t, int, uintptr_t); 11186227Stmmstatic int nexus_setup_intr(device_t, device_t, struct resource *, int, 11286227Stmm driver_intr_t *, void *, void **); 11386227Stmmstatic int nexus_teardown_intr(device_t, device_t, struct resource *, 11486227Stmm void *); 11586227Stmmstatic struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 11686227Stmm u_long, u_long, u_long, u_int); 11786227Stmmstatic int nexus_activate_resource(device_t, device_t, int, int, 11886227Stmm struct resource *); 11986227Stmmstatic int nexus_deactivate_resource(device_t, device_t, int, int, 12086227Stmm struct resource *); 12186227Stmmstatic int nexus_release_resource(device_t, device_t, int, int, 12286227Stmm struct resource *); 12386227Stmm 12486227Stmmstatic device_method_t nexus_methods[] = { 12586227Stmm /* Device interface */ 12686227Stmm DEVMETHOD(device_probe, nexus_probe), 12786227Stmm DEVMETHOD(device_attach, bus_generic_attach), 12886227Stmm DEVMETHOD(device_detach, bus_generic_detach), 12986227Stmm DEVMETHOD(device_shutdown, bus_generic_shutdown), 13086227Stmm DEVMETHOD(device_suspend, bus_generic_suspend), 13186227Stmm DEVMETHOD(device_resume, bus_generic_resume), 13286227Stmm 13386227Stmm /* Bus interface. Resource management is business of the children... */ 13486227Stmm DEVMETHOD(bus_print_child, bus_generic_print_child), 13586227Stmm DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch), 13686227Stmm DEVMETHOD(bus_read_ivar, nexus_read_ivar), 13786227Stmm DEVMETHOD(bus_write_ivar, nexus_write_ivar), 13886227Stmm DEVMETHOD(bus_setup_intr, nexus_setup_intr), 13986227Stmm DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 14086227Stmm DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 14186227Stmm DEVMETHOD(bus_activate_resource, nexus_activate_resource), 14286227Stmm DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 14386227Stmm DEVMETHOD(bus_release_resource, nexus_release_resource), 14486227Stmm 14586227Stmm { 0, 0 } 14686227Stmm}; 14786227Stmm 14886227Stmmstatic driver_t nexus_driver = { 14986227Stmm "nexus", 15086227Stmm nexus_methods, 15186227Stmm 1, /* no softc */ 15286227Stmm}; 15386227Stmm 15486227Stmmstatic devclass_t nexus_devclass; 15586227Stmm 15686227StmmDRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 15786227Stmm 15886227Stmmstatic char *nexus_excl_name[] = { 15986227Stmm "virtual-memory", 16086227Stmm "memory", 16186227Stmm "aliases", 16286227Stmm "options", 16386227Stmm "openprom", 16486227Stmm "chosen", 16586227Stmm "packages", 16686227Stmm NULL 16786227Stmm}; 16886227Stmm 16986227Stmmstatic char *nexus_excl_type[] = { 17086227Stmm "cpu", 17186227Stmm NULL 17286227Stmm}; 17386227Stmm 17486227Stmmstruct rman intr_rman; 17586227Stmmextern struct bus_space_tag nexus_bustag; 17686227Stmmextern struct bus_dma_tag nexus_dmatag; 17786227Stmm 17886227Stmmstatic int 17986227Stmmnexus_inlist(char *name, char *list[]) 18086227Stmm{ 18186227Stmm int i; 18286227Stmm 18386227Stmm for (i = 0; list[i] != NULL; i++) 18486227Stmm if (strcmp(name, list[i]) == 0) 18586227Stmm return (1); 18686227Stmm return (0); 18786227Stmm} 18886227Stmm 18986227Stmm#define NEXUS_EXCLUDED(name, type) \ 19086227Stmm (nexus_inlist((name), nexus_excl_name) || \ 19186227Stmm ((type) != NULL && nexus_inlist((type), nexus_excl_type))) 19286227Stmm 19386227Stmmstatic int 19486227Stmmnexus_probe(device_t dev) 19586227Stmm{ 19686227Stmm phandle_t root; 19786227Stmm phandle_t child; 19886227Stmm device_t cdev; 19986227Stmm struct nexus_devinfo *dinfo; 20086227Stmm char *name, *type; 20186227Stmm 20286227Stmm if ((root = OF_peer(0)) == -1) 20386227Stmm panic("nexus_probe: OF_peer failed."); 20486227Stmm 20586227Stmm intr_rman.rm_type = RMAN_ARRAY; 20686227Stmm intr_rman.rm_descr = "Interrupts"; 20786227Stmm if (rman_init(&intr_rman) != 0 || 20886227Stmm rman_manage_region(&intr_rman, 0, NIV - 1) != 0) 20986227Stmm panic("nexus_probe: failed to set up rman"); 21086227Stmm for (child = OF_child(root); child != 0; child = OF_peer(child)) { 21186227Stmm if (child == -1) 21286227Stmm panic("nexus_probe(): OF_child failed."); 21386227Stmm if (OF_getprop_alloc(child, "name", 1, (void **)&name) == -1) 21486227Stmm continue; 21586227Stmm OF_getprop_alloc(child, "device_type", 1, (void **)&type); 21686227Stmm if (NEXUS_EXCLUDED(name, type)) { 21786227Stmm free(name, M_OFWPROP); 21886227Stmm if (type != NULL) 21986227Stmm free(type, M_OFWPROP); 22086227Stmm continue; 22186227Stmm } 22286227Stmm cdev = device_add_child(dev, NULL, -1); 22386227Stmm if (cdev != NULL) { 22486227Stmm dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK); 22586227Stmm dinfo->ndi_node = child; 22686227Stmm dinfo->ndi_name = name; 22786227Stmm dinfo->ndi_device_type = type; 22886227Stmm OF_getprop_alloc(child, "model", 1, 22986227Stmm (void **)&dinfo->ndi_model); 23086227Stmm dinfo->ndi_nreg = OF_getprop_alloc(child, "reg", 23186227Stmm sizeof(*dinfo->ndi_reg), (void **)&dinfo->ndi_reg); 23286227Stmm dinfo->ndi_ninterrupts = OF_getprop_alloc(child, 23386227Stmm "interrupts", sizeof(*dinfo->ndi_interrupts), 23486227Stmm (void **)&dinfo->ndi_interrupts); 23586227Stmm dinfo->ndi_bustag = &nexus_bustag; 23686227Stmm dinfo->ndi_dmatag = &nexus_dmatag; 23786227Stmm device_set_ivars(cdev, dinfo); 23886227Stmm } else 23986227Stmm free(name, M_OFWPROP); 24086227Stmm 24186227Stmm } 24286227Stmm device_set_desc(dev, "OpenFirmware Nexus device"); 24386227Stmm return (0); 24486227Stmm} 24586227Stmm 24686227Stmmstatic void 24786227Stmmnexus_probe_nomatch(device_t dev, device_t child) 24886227Stmm{ 24986227Stmm char *name; 25086227Stmm char *type; 25186227Stmm 25286227Stmm if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME, 25386227Stmm (uintptr_t *)&name) != 0 || 25486227Stmm BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE, 25586227Stmm (uintptr_t *)&type) != 0) 25686227Stmm return; 25786227Stmm 25886227Stmm if (type == NULL) 25986227Stmm type = "(unknown)"; 26086227Stmm device_printf(dev, "<%s>, type %s (no driver attached)\n", 26186227Stmm name, type); 26286227Stmm} 26386227Stmm 26486227Stmmstatic int 26586227Stmmnexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 26686227Stmm{ 26786227Stmm struct nexus_devinfo *dinfo; 26886227Stmm 26986227Stmm if ((dinfo = device_get_ivars(child)) == 0) 27086227Stmm return (ENOENT); 27186227Stmm switch (which) { 27286227Stmm case NEXUS_IVAR_NODE: 27386227Stmm *result = dinfo->ndi_node; 27486227Stmm break; 27586227Stmm case NEXUS_IVAR_NAME: 27686227Stmm *result = (uintptr_t)dinfo->ndi_name; 27786227Stmm break; 27886227Stmm case NEXUS_IVAR_DEVICE_TYPE: 27986227Stmm *result = (uintptr_t)dinfo->ndi_device_type; 28086227Stmm break; 28186227Stmm case NEXUS_IVAR_MODEL: 28286227Stmm *result = (uintptr_t)dinfo->ndi_model; 28386227Stmm break; 28486227Stmm case NEXUS_IVAR_REG: 28586227Stmm *result = (uintptr_t)dinfo->ndi_reg; 28686227Stmm break; 28786227Stmm case NEXUS_IVAR_NREG: 28886227Stmm *result = dinfo->ndi_nreg; 28986227Stmm break; 29086227Stmm case NEXUS_IVAR_INTERRUPTS: 29186227Stmm *result = (uintptr_t)dinfo->ndi_interrupts; 29286227Stmm break; 29386227Stmm case NEXUS_IVAR_NINTERRUPTS: 29486227Stmm *result = dinfo->ndi_ninterrupts; 29586227Stmm break; 29686227Stmm case NEXUS_IVAR_BUSTAG: 29786227Stmm *result = (uintptr_t)dinfo->ndi_bustag; 29886227Stmm break; 29986227Stmm case NEXUS_IVAR_DMATAG: 30086227Stmm *result = (uintptr_t)dinfo->ndi_dmatag; 30186227Stmm break; 30286227Stmm default: 30386227Stmm return (ENOENT); 30486227Stmm } 30586227Stmm return 0; 30686227Stmm} 30786227Stmm 30886227Stmmstatic int 30986227Stmmnexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 31086227Stmm{ 31186227Stmm struct nexus_devinfo *dinfo; 31286227Stmm 31386227Stmm if ((dinfo = device_get_ivars(child)) == 0) 31486227Stmm return (ENOENT); 31586227Stmm 31686227Stmm switch (which) { 31786227Stmm case NEXUS_IVAR_NODE: 31886227Stmm case NEXUS_IVAR_NAME: 31986227Stmm case NEXUS_IVAR_DEVICE_TYPE: 32086227Stmm case NEXUS_IVAR_MODEL: 32186227Stmm case NEXUS_IVAR_REG: 32286227Stmm case NEXUS_IVAR_NREG: 32386227Stmm case NEXUS_IVAR_INTERRUPTS: 32486227Stmm case NEXUS_IVAR_NINTERRUPTS: 32586227Stmm case NEXUS_IVAR_BUSTAG: 32686227Stmm case NEXUS_IVAR_DMATAG: 32786227Stmm return (EINVAL); 32886227Stmm default: 32986227Stmm return (ENOENT); 33086227Stmm } 33186227Stmm return 0; 33286227Stmm} 33386227Stmm 33486227Stmmstatic int 33586227Stmmnexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, 33686227Stmm driver_intr_t *intr, void *arg, void **cookiep) 33786227Stmm{ 33886227Stmm int error; 33986227Stmm 34086227Stmm if (res == NULL) 34186227Stmm panic("nexus_setup_intr: NULL interrupt resource!"); 34286227Stmm 34386227Stmm if ((res->r_flags & RF_SHAREABLE) == 0) 34486227Stmm flags |= INTR_EXCL; 34586227Stmm 34686227Stmm /* 34786227Stmm * We depend here on rman_activate_resource() being idempotent. 34886227Stmm */ 34986227Stmm error = rman_activate_resource(res); 35086227Stmm if (error) 35186227Stmm return (error); 35286227Stmm 35386227Stmm error = inthand_add(device_get_nameunit(child), res->r_start, 35486227Stmm intr, arg, flags, cookiep); 35586227Stmm 35686227Stmm return (error); 35786227Stmm} 35886227Stmm 35986227Stmmstatic int 36086227Stmmnexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 36186227Stmm{ 36286227Stmm inthand_remove(r->r_start, ih); 36386227Stmm return (0); 36486227Stmm} 36586227Stmm 36686227Stmm/* 36786227Stmm * Allocate resources at the behalf of a child. This only handles interrupts, 36886227Stmm * since i/o resources are usually set up by the firmware, and thus need not 36986227Stmm * be handled here. 37086227Stmm */ 37186227Stmmstatic struct resource * 37286227Stmmnexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 37386227Stmm u_long start, u_long end, u_long count, u_int flags) 37486227Stmm{ 37586227Stmm struct resource *rv; 37686227Stmm struct rman *rm; 37786227Stmm int needactivate = flags & RF_ACTIVE; 37886227Stmm 37986227Stmm flags &= ~RF_ACTIVE; 38086227Stmm 38186227Stmm switch (type) { 38286227Stmm case SYS_RES_IRQ: 38386227Stmm rm = &intr_rman; 38486227Stmm break; 38586227Stmm default: 38686227Stmm return (NULL); 38786227Stmm } 38886227Stmm 38986227Stmm rv = rman_reserve_resource(rm, start, end, count, flags, child); 39086227Stmm if (rv == NULL) 39186227Stmm return (NULL); 39286227Stmm /* XXX: no bus_space_tag/bus_handle yet... */ 39386227Stmm 39486227Stmm if (needactivate) { 39586227Stmm if (bus_activate_resource(child, type, *rid, rv)) { 39686227Stmm rman_release_resource(rv); 39786227Stmm return (NULL); 39886227Stmm } 39986227Stmm } 40086227Stmm 40186227Stmm return (rv); 40286227Stmm} 40386227Stmm 40486227Stmmstatic int 40586227Stmmnexus_activate_resource(device_t bus, device_t child, int type, int rid, 40686227Stmm struct resource *r) 40786227Stmm{ 40886227Stmm 40986227Stmm /* Not much to be done yet... */ 41086227Stmm return (rman_activate_resource(r)); 41186227Stmm} 41286227Stmm 41386227Stmmstatic int 41486227Stmmnexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 41586227Stmm struct resource *r) 41686227Stmm{ 41786227Stmm 41886227Stmm /* Not much to be done yet... */ 41986227Stmm return (rman_deactivate_resource(r)); 42086227Stmm} 42186227Stmm 42286227Stmmstatic int 42386227Stmmnexus_release_resource(device_t bus, device_t child, int type, int rid, 42486227Stmm struct resource *r) 42586227Stmm{ 42686227Stmm int error; 42786227Stmm 42886227Stmm if (rman_get_flags(r) & RF_ACTIVE) { 42986227Stmm error = bus_deactivate_resource(child, type, rid, r); 43086227Stmm if (error) 43186227Stmm return error; 43286227Stmm } 43386227Stmm return (rman_release_resource(r)); 43486227Stmm} 435