The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sbus/sbus.c

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    1 /*-
    2  * Copyright (c) 1999-2002 Eduardo Horvath
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  *      from: NetBSD: sbus.c,v 1.50 2002/06/20 18:26:24 eeh Exp
   29  */
   30 /*-
   31  * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
   32  * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>
   33  * All rights reserved.
   34  *
   35  * Redistribution and use in source and binary forms, with or without
   36  * modification, are permitted provided that the following conditions
   37  * are met:
   38  * 1. Redistributions of source code must retain the above copyright
   39  *    notice, this list of conditions and the following disclaimer.
   40  *
   41  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR  ``AS IS'' AND
   42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR  BE LIABLE
   45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   51  * SUCH DAMAGE.
   52  */
   53 
   54 #include <sys/cdefs.h>
   55 __FBSDID("$FreeBSD: releng/9.0/sys/sparc64/sbus/sbus.c 225229 2011-08-28 11:49:53Z marius $");
   56 
   57 /*
   58  * SBus support.
   59  */
   60 
   61 #include <sys/param.h>
   62 #include <sys/systm.h>
   63 #include <sys/bus.h>
   64 #include <sys/kernel.h>
   65 #include <sys/malloc.h>
   66 #include <sys/module.h>
   67 #include <sys/pcpu.h>
   68 #include <sys/queue.h>
   69 #include <sys/reboot.h>
   70 #include <sys/rman.h>
   71 
   72 #include <dev/ofw/ofw_bus.h>
   73 #include <dev/ofw/ofw_bus_subr.h>
   74 #include <dev/ofw/openfirm.h>
   75 
   76 #include <machine/bus.h>
   77 #include <machine/bus_common.h>
   78 #include <machine/bus_private.h>
   79 #include <machine/iommureg.h>
   80 #include <machine/iommuvar.h>
   81 #include <machine/resource.h>
   82 
   83 #include <sparc64/sbus/ofw_sbus.h>
   84 #include <sparc64/sbus/sbusreg.h>
   85 #include <sparc64/sbus/sbusvar.h>
   86 
   87 struct sbus_devinfo {
   88         int                     sdi_burstsz;
   89         int                     sdi_clockfreq;
   90         int                     sdi_slot;
   91 
   92         struct ofw_bus_devinfo  sdi_obdinfo;
   93         struct resource_list    sdi_rl;
   94 };
   95 
   96 /* Range descriptor, allocated for each sc_range. */
   97 struct sbus_rd {
   98         bus_addr_t              rd_poffset;
   99         bus_addr_t              rd_pend;
  100         int                     rd_slot;
  101         bus_addr_t              rd_coffset;
  102         bus_addr_t              rd_cend;
  103         struct rman             rd_rman;
  104         bus_space_handle_t      rd_bushandle;
  105         struct resource         *rd_res;
  106 };
  107 
  108 struct sbus_softc {
  109         device_t                sc_dev;
  110         bus_dma_tag_t           sc_cdmatag;
  111         bus_space_tag_t         sc_cbustag;
  112         int                     sc_clockfreq;   /* clock frequency (in Hz) */
  113         int                     sc_nrange;
  114         struct sbus_rd          *sc_rd;
  115         int                     sc_burst;       /* burst transfer sizes supp. */
  116 
  117         struct resource         *sc_sysio_res;
  118         int                     sc_ign;         /* IGN for this sysio */
  119         struct iommu_state      sc_is;          /* IOMMU state (iommuvar.h) */
  120 
  121         struct resource         *sc_ot_ires;
  122         void                    *sc_ot_ihand;
  123         struct resource         *sc_pf_ires;
  124         void                    *sc_pf_ihand;
  125 };
  126 
  127 #define SYSIO_READ8(sc, off)                                            \
  128         bus_read_8((sc)->sc_sysio_res, (off))
  129 #define SYSIO_WRITE8(sc, off, v)                                        \
  130         bus_write_8((sc)->sc_sysio_res, (off), (v))
  131 
  132 static device_probe_t sbus_probe;
  133 static device_attach_t sbus_attach;
  134 static bus_print_child_t sbus_print_child;
  135 static bus_probe_nomatch_t sbus_probe_nomatch;
  136 static bus_read_ivar_t sbus_read_ivar;
  137 static bus_get_resource_list_t sbus_get_resource_list;
  138 static bus_setup_intr_t sbus_setup_intr;
  139 static bus_alloc_resource_t sbus_alloc_resource;
  140 static bus_release_resource_t sbus_release_resource;
  141 static bus_activate_resource_t sbus_activate_resource;
  142 static bus_deactivate_resource_t sbus_deactivate_resource;
  143 static bus_get_dma_tag_t sbus_get_dma_tag;
  144 static ofw_bus_get_devinfo_t sbus_get_devinfo;
  145 
  146 static int sbus_inlist(const char *, const char *const *);
  147 static struct sbus_devinfo * sbus_setup_dinfo(device_t, struct sbus_softc *,
  148     phandle_t);
  149 static void sbus_destroy_dinfo(struct sbus_devinfo *);
  150 static void sbus_intr_enable(void *);
  151 static void sbus_intr_disable(void *);
  152 static void sbus_intr_assign(void *);
  153 static void sbus_intr_clear(void *);
  154 static int sbus_find_intrmap(struct sbus_softc *, u_int, bus_addr_t *,
  155     bus_addr_t *);
  156 static bus_space_tag_t sbus_alloc_bustag(struct sbus_softc *);
  157 static driver_intr_t sbus_overtemp;
  158 static driver_intr_t sbus_pwrfail;
  159 static int sbus_print_res(struct sbus_devinfo *);
  160 
  161 static device_method_t sbus_methods[] = {
  162         /* Device interface */
  163         DEVMETHOD(device_probe,         sbus_probe),
  164         DEVMETHOD(device_attach,        sbus_attach),
  165         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  166         DEVMETHOD(device_suspend,       bus_generic_suspend),
  167         DEVMETHOD(device_resume,        bus_generic_resume),
  168 
  169         /* Bus interface */
  170         DEVMETHOD(bus_print_child,      sbus_print_child),
  171         DEVMETHOD(bus_probe_nomatch,    sbus_probe_nomatch),
  172         DEVMETHOD(bus_read_ivar,        sbus_read_ivar),
  173         DEVMETHOD(bus_alloc_resource,   sbus_alloc_resource),
  174         DEVMETHOD(bus_activate_resource,        sbus_activate_resource),
  175         DEVMETHOD(bus_deactivate_resource,      sbus_deactivate_resource),
  176         DEVMETHOD(bus_release_resource, sbus_release_resource),
  177         DEVMETHOD(bus_setup_intr,       sbus_setup_intr),
  178         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  179         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  180         DEVMETHOD(bus_get_resource_list, sbus_get_resource_list),
  181         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
  182         DEVMETHOD(bus_get_dma_tag,      sbus_get_dma_tag),
  183 
  184         /* ofw_bus interface */
  185         DEVMETHOD(ofw_bus_get_devinfo,  sbus_get_devinfo),
  186         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  187         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  188         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  189         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  190         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  191 
  192         KOBJMETHOD_END
  193 };
  194 
  195 static driver_t sbus_driver = {
  196         "sbus",
  197         sbus_methods,
  198         sizeof(struct sbus_softc),
  199 };
  200 
  201 static devclass_t sbus_devclass;
  202 
  203 EARLY_DRIVER_MODULE(sbus, nexus, sbus_driver, sbus_devclass, 0, 0,
  204     BUS_PASS_BUS);
  205 MODULE_DEPEND(sbus, nexus, 1, 1, 1);
  206 MODULE_VERSION(sbus, 1);
  207 
  208 #define OFW_SBUS_TYPE   "sbus"
  209 #define OFW_SBUS_NAME   "sbus"
  210 
  211 static const struct intr_controller sbus_ic = {
  212         sbus_intr_enable,
  213         sbus_intr_disable,
  214         sbus_intr_assign,
  215         sbus_intr_clear
  216 };
  217 
  218 struct sbus_icarg {
  219         struct sbus_softc       *sica_sc;
  220         bus_addr_t              sica_map;
  221         bus_addr_t              sica_clr;
  222 };
  223 
  224 static const char *const sbus_order_first[] = {
  225         "auxio",
  226         "dma",
  227         NULL
  228 };
  229 
  230 static int
  231 sbus_inlist(const char *name, const char *const *list)
  232 {
  233         int i;
  234 
  235         if (name == NULL)
  236                 return (0);
  237         for (i = 0; list[i] != NULL; i++) {
  238                 if (strcmp(name, list[i]) == 0)
  239                         return (1);
  240         }
  241         return (0);
  242 }
  243 
  244 static int
  245 sbus_probe(device_t dev)
  246 {
  247         const char *t;
  248 
  249         t = ofw_bus_get_type(dev);
  250         if (((t == NULL || strcmp(t, OFW_SBUS_TYPE) != 0)) &&
  251             strcmp(ofw_bus_get_name(dev), OFW_SBUS_NAME) != 0)
  252                 return (ENXIO);
  253         device_set_desc(dev, "U2S UPA-SBus bridge");
  254         return (0);
  255 }
  256 
  257 static int
  258 sbus_attach(device_t dev)
  259 {
  260         struct sbus_softc *sc;
  261         struct sbus_devinfo *sdi;
  262         struct sbus_icarg *sica;
  263         struct sbus_ranges *range;
  264         struct resource *res;
  265         struct resource_list *rl;
  266         device_t cdev;
  267         bus_addr_t intrclr, intrmap, phys;
  268         bus_size_t size;
  269         u_long vec;
  270         phandle_t child, node;
  271         uint32_t prop;
  272         int i, j;
  273 
  274         sc = device_get_softc(dev);
  275         sc->sc_dev = dev;
  276         node = ofw_bus_get_node(dev);
  277 
  278         i = 0;
  279         sc->sc_sysio_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
  280             RF_ACTIVE);
  281         if (sc->sc_sysio_res == NULL)
  282                 panic("%s: cannot allocate device memory", __func__);
  283 
  284         if (OF_getprop(node, "interrupts", &prop, sizeof(prop)) == -1)
  285                 panic("%s: cannot get IGN", __func__);
  286         sc->sc_ign = INTIGN(prop);
  287         sc->sc_cbustag = sbus_alloc_bustag(sc);
  288 
  289         /*
  290          * Record clock frequency for synchronous SCSI.
  291          * IS THIS THE CORRECT DEFAULT??
  292          */
  293         if (OF_getprop(node, "clock-frequency", &prop, sizeof(prop)) == -1)
  294                 prop = 25000000;
  295         sc->sc_clockfreq = prop;
  296         prop /= 1000;
  297         device_printf(dev, "clock %d.%03d MHz\n", prop / 1000, prop % 1000);
  298 
  299         /*
  300          * Collect address translations from the OBP.
  301          */
  302         if ((sc->sc_nrange = OF_getprop_alloc(node, "ranges",
  303             sizeof(*range), (void **)&range)) == -1) {
  304                 panic("%s: error getting ranges property", __func__);
  305         }
  306         sc->sc_rd = malloc(sizeof(*sc->sc_rd) * sc->sc_nrange, M_DEVBUF,
  307             M_NOWAIT | M_ZERO);
  308         if (sc->sc_rd == NULL)
  309                 panic("%s: cannot allocate rmans", __func__);
  310         /*
  311          * Preallocate all space that the SBus bridge decodes, so that nothing
  312          * else gets in the way; set up rmans etc.
  313          */
  314         rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
  315         for (i = 0; i < sc->sc_nrange; i++) {
  316                 phys = range[i].poffset | ((bus_addr_t)range[i].pspace << 32);
  317                 size = range[i].size;
  318                 sc->sc_rd[i].rd_slot = range[i].cspace;
  319                 sc->sc_rd[i].rd_coffset = range[i].coffset;
  320                 sc->sc_rd[i].rd_cend = sc->sc_rd[i].rd_coffset + size;
  321                 j = resource_list_add_next(rl, SYS_RES_MEMORY, phys,
  322                     phys + size - 1, size);
  323                 if ((res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &j,
  324                     RF_ACTIVE)) == NULL)
  325                         panic("%s: cannot allocate decoded range", __func__);
  326                 sc->sc_rd[i].rd_bushandle = rman_get_bushandle(res);
  327                 sc->sc_rd[i].rd_rman.rm_type = RMAN_ARRAY;
  328                 sc->sc_rd[i].rd_rman.rm_descr = "SBus Device Memory";
  329                 if (rman_init(&sc->sc_rd[i].rd_rman) != 0 ||
  330                     rman_manage_region(&sc->sc_rd[i].rd_rman, 0, size) != 0)
  331                         panic("%s: failed to set up memory rman", __func__);
  332                 sc->sc_rd[i].rd_poffset = phys;
  333                 sc->sc_rd[i].rd_pend = phys + size;
  334                 sc->sc_rd[i].rd_res = res;
  335         }
  336         free(range, M_OFWPROP);
  337 
  338         /*
  339          * Get the SBus burst transfer size if burst transfers are supported.
  340          */
  341         if (OF_getprop(node, "up-burst-sizes", &sc->sc_burst,
  342             sizeof(sc->sc_burst)) == -1 || sc->sc_burst == 0)
  343                 sc->sc_burst =
  344                     (SBUS_BURST64_DEF << SBUS_BURST64_SHIFT) | SBUS_BURST_DEF;
  345 
  346 
  347         /* initalise the IOMMU */
  348 
  349         /* punch in our copies */
  350         sc->sc_is.is_pmaxaddr = IOMMU_MAXADDR(SBUS_IOMMU_BITS);
  351         sc->sc_is.is_bustag = rman_get_bustag(sc->sc_sysio_res);
  352         sc->sc_is.is_bushandle = rman_get_bushandle(sc->sc_sysio_res);
  353         sc->sc_is.is_iommu = SBR_IOMMU;
  354         sc->sc_is.is_dtag = SBR_IOMMU_TLB_TAG_DIAG;
  355         sc->sc_is.is_ddram = SBR_IOMMU_TLB_DATA_DIAG;
  356         sc->sc_is.is_dqueue = SBR_IOMMU_QUEUE_DIAG;
  357         sc->sc_is.is_dva = SBR_IOMMU_SVADIAG;
  358         sc->sc_is.is_dtcmp = 0;
  359         sc->sc_is.is_sb[0] = SBR_STRBUF;
  360         sc->sc_is.is_sb[1] = 0;
  361 
  362         /*
  363          * Note: the SBus IOMMU ignores the high bits of an address, so a NULL
  364          * DMA pointer will be translated by the first page of the IOTSB.
  365          * To detect bugs we'll allocate and ignore the first entry.
  366          */
  367         iommu_init(device_get_nameunit(dev), &sc->sc_is, 3, -1, 1);
  368 
  369         /* Create the DMA tag. */
  370         if (bus_dma_tag_create(bus_get_dma_tag(dev), 8, 0,
  371             sc->sc_is.is_pmaxaddr, ~0, NULL, NULL, sc->sc_is.is_pmaxaddr,
  372             0xff, 0xffffffff, 0, NULL, NULL, &sc->sc_cdmatag) != 0)
  373                 panic("%s: bus_dma_tag_create failed", __func__);
  374         /* Customize the tag. */
  375         sc->sc_cdmatag->dt_cookie = &sc->sc_is;
  376         sc->sc_cdmatag->dt_mt = &iommu_dma_methods;
  377 
  378         /*
  379          * Hunt through all the interrupt mapping regs and register our
  380          * interrupt controller for the corresponding interrupt vectors.
  381          * We do this early in order to be able to catch stray interrupts.
  382          */
  383         for (i = 0; i <= SBUS_MAX_INO; i++) {
  384                 if (sbus_find_intrmap(sc, i, &intrmap, &intrclr) == 0)
  385                         continue;
  386                 sica = malloc(sizeof(*sica), M_DEVBUF, M_NOWAIT);
  387                 if (sica == NULL)
  388                         panic("%s: could not allocate interrupt controller "
  389                             "argument", __func__);
  390                 sica->sica_sc = sc;
  391                 sica->sica_map = intrmap;
  392                 sica->sica_clr = intrclr;
  393 #ifdef SBUS_DEBUG
  394                 device_printf(dev,
  395                     "intr map (INO %d, %s) %#lx: %#lx, clr: %#lx\n",
  396                     i, (i & INTMAP_OBIO_MASK) == 0 ? "SBus slot" : "OBIO",
  397                     (u_long)intrmap, (u_long)SYSIO_READ8(sc, intrmap),
  398                     (u_long)intrclr);
  399 #endif
  400                 j = intr_controller_register(INTMAP_VEC(sc->sc_ign, i),
  401                     &sbus_ic, sica);
  402                 if (j != 0)
  403                         device_printf(dev, "could not register interrupt "
  404                             "controller for INO %d (%d)\n", i, j);
  405         }
  406 
  407         /* Enable the over-temperature and power-fail interrupts. */
  408         i = 4;
  409         sc->sc_ot_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
  410             RF_ACTIVE);
  411         if (sc->sc_ot_ires == NULL ||
  412             INTIGN(vec = rman_get_start(sc->sc_ot_ires)) != sc->sc_ign ||
  413             INTVEC(SYSIO_READ8(sc, SBR_THERM_INT_MAP)) != vec ||
  414             intr_vectors[vec].iv_ic != &sbus_ic ||
  415             bus_setup_intr(dev, sc->sc_ot_ires, INTR_TYPE_MISC | INTR_BRIDGE,
  416             NULL, sbus_overtemp, sc, &sc->sc_ot_ihand) != 0)
  417                 panic("%s: failed to set up temperature interrupt", __func__);
  418         i = 3;
  419         sc->sc_pf_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
  420             RF_ACTIVE);
  421         if (sc->sc_pf_ires == NULL ||
  422             INTIGN(vec = rman_get_start(sc->sc_pf_ires)) != sc->sc_ign ||
  423             INTVEC(SYSIO_READ8(sc, SBR_POWER_INT_MAP)) != vec ||
  424             intr_vectors[vec].iv_ic != &sbus_ic ||
  425             bus_setup_intr(dev, sc->sc_pf_ires, INTR_TYPE_MISC | INTR_BRIDGE,
  426             NULL, sbus_pwrfail, sc, &sc->sc_pf_ihand) != 0)
  427                 panic("%s: failed to set up power fail interrupt", __func__);
  428 
  429         /* Initialize the counter-timer. */
  430         sparc64_counter_init(device_get_nameunit(dev),
  431             rman_get_bustag(sc->sc_sysio_res),
  432             rman_get_bushandle(sc->sc_sysio_res), SBR_TC0);
  433 
  434         /*
  435          * Loop through ROM children, fixing any relative addresses
  436          * and then configuring each device.
  437          */
  438         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  439                 if ((sdi = sbus_setup_dinfo(dev, sc, child)) == NULL)
  440                         continue;
  441                 /*
  442                  * For devices where there are variants that are actually
  443                  * split into two SBus devices (as opposed to the first
  444                  * half of the device being a SBus device and the second
  445                  * half hanging off of the first one) like 'auxio' and
  446                  * 'SUNW,fdtwo' or 'dma' and 'esp' probe the SBus device
  447                  * which is a prerequisite to the driver attaching to the
  448                  * second one with a lower order. Saves us from dealing
  449                  * with different probe orders in the respective device
  450                  * drivers which generally is more hackish.
  451                  */
  452                 cdev = device_add_child_ordered(dev, (OF_child(child) == 0 &&
  453                     sbus_inlist(sdi->sdi_obdinfo.obd_name, sbus_order_first)) ?
  454                     SBUS_ORDER_FIRST : SBUS_ORDER_NORMAL, NULL, -1);
  455                 if (cdev == NULL) {
  456                         device_printf(dev,
  457                             "<%s>: device_add_child_ordered failed\n",
  458                             sdi->sdi_obdinfo.obd_name);
  459                         sbus_destroy_dinfo(sdi);
  460                         continue;
  461                 }
  462                 device_set_ivars(cdev, sdi);
  463         }
  464         return (bus_generic_attach(dev));
  465 }
  466 
  467 static struct sbus_devinfo *
  468 sbus_setup_dinfo(device_t dev, struct sbus_softc *sc, phandle_t node)
  469 {
  470         struct sbus_devinfo *sdi;
  471         struct sbus_regs *reg;
  472         u_int32_t base, iv, *intr;
  473         int i, nreg, nintr, slot, rslot;
  474 
  475         sdi = malloc(sizeof(*sdi), M_DEVBUF, M_ZERO | M_WAITOK);
  476         if (ofw_bus_gen_setup_devinfo(&sdi->sdi_obdinfo, node) != 0) {
  477                 free(sdi, M_DEVBUF);
  478                 return (NULL);
  479         }
  480         resource_list_init(&sdi->sdi_rl);
  481         slot = -1;
  482         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
  483         if (nreg == -1) {
  484                 if (sdi->sdi_obdinfo.obd_type == NULL ||
  485                     strcmp(sdi->sdi_obdinfo.obd_type, "hierarchical") != 0) {
  486                         device_printf(dev, "<%s>: incomplete\n",
  487                             sdi->sdi_obdinfo.obd_name);
  488                         goto fail;
  489                 }
  490         } else {
  491                 for (i = 0; i < nreg; i++) {
  492                         base = reg[i].sbr_offset;
  493                         if (SBUS_ABS(base)) {
  494                                 rslot = SBUS_ABS_TO_SLOT(base);
  495                                 base = SBUS_ABS_TO_OFFSET(base);
  496                         } else
  497                                 rslot = reg[i].sbr_slot;
  498                         if (slot != -1 && slot != rslot) {
  499                                 device_printf(dev, "<%s>: multiple slots\n",
  500                                     sdi->sdi_obdinfo.obd_name);
  501                                 free(reg, M_OFWPROP);
  502                                 goto fail;
  503                         }
  504                         slot = rslot;
  505 
  506                         resource_list_add(&sdi->sdi_rl, SYS_RES_MEMORY, i,
  507                             base, base + reg[i].sbr_size, reg[i].sbr_size);
  508                 }
  509                 free(reg, M_OFWPROP);
  510         }
  511         sdi->sdi_slot = slot;
  512 
  513         /*
  514          * The `interrupts' property contains the SBus interrupt level.
  515          */
  516         nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr),
  517             (void **)&intr);
  518         if (nintr != -1) {
  519                 for (i = 0; i < nintr; i++) {
  520                         iv = intr[i];
  521                         /*
  522                          * SBus card devices need the slot number encoded into
  523                          * the vector as this is generally not done.
  524                          */
  525                         if ((iv & INTMAP_OBIO_MASK) == 0)
  526                                 iv |= slot << 3;
  527                         iv = INTMAP_VEC(sc->sc_ign, iv);
  528                         resource_list_add(&sdi->sdi_rl, SYS_RES_IRQ, i,
  529                             iv, iv, 1);
  530                 }
  531                 free(intr, M_OFWPROP);
  532         }
  533         if (OF_getprop(node, "burst-sizes", &sdi->sdi_burstsz,
  534             sizeof(sdi->sdi_burstsz)) == -1)
  535                 sdi->sdi_burstsz = sc->sc_burst;
  536         else
  537                 sdi->sdi_burstsz &= sc->sc_burst;
  538         if (OF_getprop(node, "clock-frequency", &sdi->sdi_clockfreq,
  539             sizeof(sdi->sdi_clockfreq)) == -1)
  540                 sdi->sdi_clockfreq = sc->sc_clockfreq;
  541 
  542         return (sdi);
  543 
  544 fail:
  545         sbus_destroy_dinfo(sdi);
  546         return (NULL);
  547 }
  548 
  549 static void
  550 sbus_destroy_dinfo(struct sbus_devinfo *dinfo)
  551 {
  552 
  553         resource_list_free(&dinfo->sdi_rl);
  554         ofw_bus_gen_destroy_devinfo(&dinfo->sdi_obdinfo);
  555         free(dinfo, M_DEVBUF);
  556 }
  557 
  558 static int
  559 sbus_print_child(device_t dev, device_t child)
  560 {
  561         int rv;
  562 
  563         rv = bus_print_child_header(dev, child);
  564         rv += sbus_print_res(device_get_ivars(child));
  565         rv += bus_print_child_footer(dev, child);
  566         return (rv);
  567 }
  568 
  569 static void
  570 sbus_probe_nomatch(device_t dev, device_t child)
  571 {
  572         const char *type;
  573 
  574         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  575         sbus_print_res(device_get_ivars(child));
  576         type = ofw_bus_get_type(child);
  577         printf(" type %s (no driver attached)\n",
  578             type != NULL ? type : "unknown");
  579 }
  580 
  581 static int
  582 sbus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  583 {
  584         struct sbus_softc *sc;
  585         struct sbus_devinfo *dinfo;
  586 
  587         sc = device_get_softc(dev);
  588         if ((dinfo = device_get_ivars(child)) == NULL)
  589                 return (ENOENT);
  590         switch (which) {
  591         case SBUS_IVAR_BURSTSZ:
  592                 *result = dinfo->sdi_burstsz;
  593                 break;
  594         case SBUS_IVAR_CLOCKFREQ:
  595                 *result = dinfo->sdi_clockfreq;
  596                 break;
  597         case SBUS_IVAR_IGN:
  598                 *result = sc->sc_ign;
  599                 break;
  600         case SBUS_IVAR_SLOT:
  601                 *result = dinfo->sdi_slot;
  602                 break;
  603         default:
  604                 return (ENOENT);
  605         }
  606         return (0);
  607 }
  608 
  609 static struct resource_list *
  610 sbus_get_resource_list(device_t dev, device_t child)
  611 {
  612         struct sbus_devinfo *sdi;
  613 
  614         sdi = device_get_ivars(child);
  615         return (&sdi->sdi_rl);
  616 }
  617 
  618 static void
  619 sbus_intr_enable(void *arg)
  620 {
  621         struct intr_vector *iv = arg;
  622         struct sbus_icarg *sica = iv->iv_icarg;
  623 
  624         SYSIO_WRITE8(sica->sica_sc, sica->sica_map,
  625             INTMAP_ENABLE(iv->iv_vec, iv->iv_mid));
  626 }
  627 
  628 static void
  629 sbus_intr_disable(void *arg)
  630 {
  631         struct intr_vector *iv = arg;
  632         struct sbus_icarg *sica = iv->iv_icarg;
  633 
  634         SYSIO_WRITE8(sica->sica_sc, sica->sica_map, iv->iv_vec);
  635 }
  636 
  637 static void
  638 sbus_intr_assign(void *arg)
  639 {
  640         struct intr_vector *iv = arg;
  641         struct sbus_icarg *sica = iv->iv_icarg;
  642 
  643         SYSIO_WRITE8(sica->sica_sc, sica->sica_map, INTMAP_TID(
  644             SYSIO_READ8(sica->sica_sc, sica->sica_map), iv->iv_mid));
  645 }
  646 
  647 static void
  648 sbus_intr_clear(void *arg)
  649 {
  650         struct intr_vector *iv = arg;
  651         struct sbus_icarg *sica = iv->iv_icarg;
  652 
  653         SYSIO_WRITE8(sica->sica_sc, sica->sica_clr, INTCLR_IDLE);
  654 }
  655 
  656 static int
  657 sbus_find_intrmap(struct sbus_softc *sc, u_int ino, bus_addr_t *intrmapptr,
  658     bus_addr_t *intrclrptr)
  659 {
  660         bus_addr_t intrclr, intrmap;
  661         int i;
  662 
  663         if (ino > SBUS_MAX_INO) {
  664                 device_printf(sc->sc_dev, "out of range INO %d requested\n",
  665                     ino);
  666                 return (0);
  667         }
  668 
  669         if ((ino & INTMAP_OBIO_MASK) == 0) {
  670                 intrmap = SBR_SLOT0_INT_MAP + INTSLOT(ino) * 8;
  671                 intrclr = SBR_SLOT0_INT_CLR +
  672                     (INTSLOT(ino) * 8 * 8) + (INTPRI(ino) * 8);
  673         } else {
  674                 intrclr = 0;
  675                 for (i = 0, intrmap = SBR_SCSI_INT_MAP;
  676                     intrmap <= SBR_RESERVED_INT_MAP; intrmap += 8, i++) {
  677                         if (INTVEC(SYSIO_READ8(sc, intrmap)) ==
  678                             INTMAP_VEC(sc->sc_ign, ino)) {
  679                                 intrclr = SBR_SCSI_INT_CLR + i * 8;
  680                                 break;
  681                         }
  682                 }
  683                 if (intrclr == 0)
  684                         return (0);
  685         }
  686         if (intrmapptr != NULL)
  687                 *intrmapptr = intrmap;
  688         if (intrclrptr != NULL)
  689                 *intrclrptr = intrclr;
  690         return (1);
  691 }
  692 
  693 static int
  694 sbus_setup_intr(device_t dev, device_t child, struct resource *ires, int flags,
  695     driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
  696 {
  697         struct sbus_softc *sc;
  698         u_long vec;
  699 
  700         sc = device_get_softc(dev);
  701         /*
  702          * Make sure the vector is fully specified and we registered
  703          * our interrupt controller for it.
  704          */
  705         vec = rman_get_start(ires);
  706         if (INTIGN(vec) != sc->sc_ign || intr_vectors[vec].iv_ic != &sbus_ic) {
  707                 device_printf(dev, "invalid interrupt vector 0x%lx\n", vec);
  708                 return (EINVAL);
  709         }
  710         return (bus_generic_setup_intr(dev, child, ires, flags, filt, intr,
  711             arg, cookiep));
  712 }
  713 
  714 static struct resource *
  715 sbus_alloc_resource(device_t bus, device_t child, int type, int *rid,
  716     u_long start, u_long end, u_long count, u_int flags)
  717 {
  718         struct sbus_softc *sc;
  719         struct rman *rm;
  720         struct resource *rv;
  721         struct resource_list *rl;
  722         struct resource_list_entry *rle;
  723         device_t schild;
  724         bus_space_handle_t bh;
  725         bus_addr_t toffs;
  726         bus_size_t tend;
  727         int i, slot;
  728         int isdefault, needactivate, passthrough;
  729 
  730         isdefault = (start == 0UL && end == ~0UL);
  731         needactivate = flags & RF_ACTIVE;
  732         passthrough = (device_get_parent(child) != bus);
  733         rle = NULL;
  734         sc = device_get_softc(bus);
  735         rl = BUS_GET_RESOURCE_LIST(bus, child);
  736         switch (type) {
  737         case SYS_RES_IRQ:
  738                 return (resource_list_alloc(rl, bus, child, type, rid, start,
  739                     end, count, flags));
  740         case SYS_RES_MEMORY:
  741                 if (!passthrough) {
  742                         rle = resource_list_find(rl, type, *rid);
  743                         if (rle == NULL)
  744                                 return (NULL);
  745                         if (rle->res != NULL)
  746                                 panic("%s: resource entry is busy", __func__);
  747                         if (isdefault) {
  748                                 start = rle->start;
  749                                 count = ulmax(count, rle->count);
  750                                 end = ulmax(rle->end, start + count - 1);
  751                         }
  752                 }
  753                 rm = NULL;
  754                 bh = toffs = tend = 0;
  755                 schild = child;
  756                 while (device_get_parent(schild) != bus)
  757                         schild = device_get_parent(schild);
  758                 slot = sbus_get_slot(schild);
  759                 for (i = 0; i < sc->sc_nrange; i++) {
  760                         if (sc->sc_rd[i].rd_slot != slot ||
  761                             start < sc->sc_rd[i].rd_coffset ||
  762                             start > sc->sc_rd[i].rd_cend)
  763                                 continue;
  764                         /* Disallow cross-range allocations. */
  765                         if (end > sc->sc_rd[i].rd_cend)
  766                                 return (NULL);
  767                         /* We've found the connection to the parent bus */
  768                         toffs = start - sc->sc_rd[i].rd_coffset;
  769                         tend = end - sc->sc_rd[i].rd_coffset;
  770                         rm = &sc->sc_rd[i].rd_rman;
  771                         bh = sc->sc_rd[i].rd_bushandle;
  772                         break;
  773                 }
  774                 if (rm == NULL)
  775                         return (NULL);
  776                 flags &= ~RF_ACTIVE;
  777                 rv = rman_reserve_resource(rm, toffs, tend, count, flags,
  778                     child);
  779                 if (rv == NULL)
  780                         return (NULL);
  781                 rman_set_rid(rv, *rid);
  782                 rman_set_bustag(rv, sc->sc_cbustag);
  783                 rman_set_bushandle(rv, bh + rman_get_start(rv));
  784                 if (needactivate) {
  785                         if (bus_activate_resource(child, type, *rid, rv)) {
  786                                 rman_release_resource(rv);
  787                                 return (NULL);
  788                         }
  789                 }
  790                 if (!passthrough)
  791                         rle->res = rv;
  792                 return (rv);
  793         default:
  794                 return (NULL);
  795         }
  796 }
  797 
  798 static int
  799 sbus_activate_resource(device_t bus, device_t child, int type, int rid,
  800     struct resource *r)
  801 {
  802         void *p;
  803         int error;
  804 
  805         if (type == SYS_RES_IRQ) {
  806                 return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus),
  807                     child, type, rid, r));
  808         }
  809         if (type == SYS_RES_MEMORY) {
  810                 /*
  811                  * Need to memory-map the device space, as some drivers
  812                  * depend on the virtual address being set and usable.
  813                  */
  814                 error = sparc64_bus_mem_map(rman_get_bustag(r),
  815                     rman_get_bushandle(r), rman_get_size(r), 0, 0, &p);
  816                 if (error != 0)
  817                         return (error);
  818                 rman_set_virtual(r, p);
  819         }
  820         return (rman_activate_resource(r));
  821 }
  822 
  823 static int
  824 sbus_deactivate_resource(device_t bus, device_t child, int type, int rid,
  825     struct resource *r)
  826 {
  827 
  828         if (type == SYS_RES_IRQ) {
  829                 return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus),
  830                     child, type, rid, r));
  831         }
  832         if (type == SYS_RES_MEMORY) {
  833                 sparc64_bus_mem_unmap(rman_get_virtual(r), rman_get_size(r));
  834                 rman_set_virtual(r, NULL);
  835         }
  836         return (rman_deactivate_resource(r));
  837 }
  838 
  839 static int
  840 sbus_release_resource(device_t bus, device_t child, int type, int rid,
  841     struct resource *r)
  842 {
  843         struct resource_list *rl;
  844         struct resource_list_entry *rle;
  845         int error, passthrough;
  846 
  847         passthrough = (device_get_parent(child) != bus);
  848         rl = BUS_GET_RESOURCE_LIST(bus, child);
  849         if (type == SYS_RES_IRQ)
  850                 return (resource_list_release(rl, bus, child, type, rid, r));
  851         if ((rman_get_flags(r) & RF_ACTIVE) != 0) {
  852                 error = bus_deactivate_resource(child, type, rid, r);
  853                 if (error != 0)
  854                         return (error);
  855         }
  856         error = rman_release_resource(r);
  857         if (error != 0 || passthrough)
  858                 return (error);
  859         rle = resource_list_find(rl, type, rid);
  860         if (rle == NULL)
  861                 panic("%s: cannot find resource", __func__);
  862         if (rle->res == NULL)
  863                 panic("%s: resource entry is not busy", __func__);
  864         rle->res = NULL;
  865         return (0);
  866 }
  867 
  868 static bus_dma_tag_t
  869 sbus_get_dma_tag(device_t bus, device_t child)
  870 {
  871         struct sbus_softc *sc;
  872 
  873         sc = device_get_softc(bus);
  874         return (sc->sc_cdmatag);
  875 }
  876 
  877 static const struct ofw_bus_devinfo *
  878 sbus_get_devinfo(device_t bus, device_t child)
  879 {
  880         struct sbus_devinfo *sdi;
  881 
  882         sdi = device_get_ivars(child);
  883         return (&sdi->sdi_obdinfo);
  884 }
  885 
  886 /*
  887  * Handle an overtemp situation.
  888  *
  889  * SPARCs have temperature sensors which generate interrupts
  890  * if the machine's temperature exceeds a certain threshold.
  891  * This handles the interrupt and powers off the machine.
  892  * The same needs to be done to PCI controller drivers.
  893  */
  894 static void
  895 sbus_overtemp(void *arg)
  896 {
  897         static int shutdown;
  898 
  899         /* As the interrupt is cleared we may be called multiple times. */
  900         if (shutdown != 0)
  901                 return;
  902         shutdown++;
  903         printf("DANGER: OVER TEMPERATURE detected\nShutting down NOW.\n");
  904         shutdown_nice(RB_POWEROFF);
  905 }
  906 
  907 /* Try to shut down in time in case of power failure. */
  908 static void
  909 sbus_pwrfail(void *arg)
  910 {
  911         static int shutdown;
  912 
  913         /* As the interrupt is cleared we may be called multiple times. */
  914         if (shutdown != 0)
  915                 return;
  916         shutdown++;
  917         printf("Power failure detected\nShutting down NOW.\n");
  918         shutdown_nice(0);
  919 }
  920 
  921 static bus_space_tag_t
  922 sbus_alloc_bustag(struct sbus_softc *sc)
  923 {
  924         bus_space_tag_t sbt;
  925 
  926         sbt = (bus_space_tag_t)malloc(sizeof(struct bus_space_tag), M_DEVBUF,
  927             M_NOWAIT | M_ZERO);
  928         if (sbt == NULL)
  929                 panic("%s: out of memory", __func__);
  930 
  931         sbt->bst_cookie = sc;
  932         sbt->bst_parent = rman_get_bustag(sc->sc_sysio_res);
  933         sbt->bst_type = SBUS_BUS_SPACE;
  934         return (sbt);
  935 }
  936 
  937 static int
  938 sbus_print_res(struct sbus_devinfo *sdi)
  939 {
  940         int rv;
  941 
  942         rv = 0;
  943         rv += resource_list_print_type(&sdi->sdi_rl, "mem", SYS_RES_MEMORY,
  944             "%#lx");
  945         rv += resource_list_print_type(&sdi->sdi_rl, "irq", SYS_RES_IRQ,
  946             "%ld");
  947         return (rv);
  948 }

Cache object: a11cd89c97d67dee1282336d6ef6d874


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