thunder_mdio_fdt.c

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    1 /*-
    2  * Copyright (c) 2015 The FreeBSD Foundation
    3  * All rights reserved.
    4  *
    5  * This software was developed by Semihalf under
    6  * the sponsorship of the FreeBSD Foundation.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/bus.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 
   39 #include <dev/ofw/ofw_bus.h>
   40 #include <dev/ofw/ofw_bus_subr.h>
   41 #include <dev/fdt/simplebus.h>
   42 
   43 #include <machine/bus.h>
   44 #include <machine/resource.h>
   45 
   46 #include "thunder_mdio_var.h"
   47 
   48 static int thunder_mdio_fdt_probe(device_t);
   49 static int thunder_mdio_fdt_attach(device_t);
   50 
   51 static device_method_t thunder_mdio_fdt_methods[] = {
   52         /* Device interface */
   53         DEVMETHOD(device_probe,         thunder_mdio_fdt_probe),
   54         DEVMETHOD(device_attach,        thunder_mdio_fdt_attach),
   55 
   56         /* End */
   57         DEVMETHOD_END
   58 };
   59 
   60 DEFINE_CLASS_1(thunder_mdio, thunder_mdio_fdt_driver, thunder_mdio_fdt_methods,
   61     sizeof(struct thunder_mdio_softc), thunder_mdio_driver);
   62 
   63 static devclass_t thunder_mdio_fdt_devclass;
   64 
   65 EARLY_DRIVER_MODULE(thunder_mdio, ofwbus, thunder_mdio_fdt_driver,
   66     thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
   67 EARLY_DRIVER_MODULE(thunder_mdio, mdionexus, thunder_mdio_fdt_driver,
   68     thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
   69 
   70 static struct ofw_compat_data mdio_compat_data[] = {
   71         {"cavium,octeon-3860-mdio",     true},
   72         {"cavium,thunder-8890-mdio",    true},
   73         {NULL,                          false}
   74 };
   75 
   76 static int
   77 thunder_mdio_fdt_probe(device_t dev)
   78 {
   79 
   80         if (!ofw_bus_status_okay(dev))
   81                 return (ENXIO);
   82         if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_data)
   83                 return (ENXIO);
   84 
   85         device_set_desc(dev, THUNDER_MDIO_DEVSTR);
   86         return (BUS_PROBE_DEFAULT);
   87 }
   88 
   89 static int
   90 thunder_mdio_fdt_attach(device_t dev)
   91 {
   92         phandle_t node;
   93         int ret;
   94 
   95         /* Call core attach */
   96         ret = thunder_mdio_attach(dev);
   97         if (ret != 0)
   98                 return (ret);
   99         /*
  100          * Register device to this node/xref.
  101          * Thanks to that we will be able to retrieve device_t structure
  102          * while holding only node reference acquired from FDT.
  103          */
  104         node = ofw_bus_get_node(dev);
  105         OF_device_register_xref(OF_xref_from_node(node), dev);
  106 
  107         return (0);
  108 }
  109 
  110 struct mdionexus_softc {
  111         struct simplebus_softc simplebus_sc;
  112 };
  113 
  114 static device_probe_t mdionexus_fdt_probe;
  115 static device_attach_t mdionexus_fdt_attach;
  116 
  117 static const struct ofw_bus_devinfo * mdionexus_ofw_get_devinfo(device_t,
  118     device_t);
  119 
  120 static device_method_t mdionexus_fdt_methods[] = {
  121         /* Device interface */
  122         DEVMETHOD(device_probe,         mdionexus_fdt_probe),
  123         DEVMETHOD(device_attach,        mdionexus_fdt_attach),
  124 
  125         /* Bus interface */
  126         DEVMETHOD(bus_alloc_resource,           bus_generic_alloc_resource),
  127         DEVMETHOD(bus_release_resource,         bus_generic_release_resource),
  128         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
  129 
  130         /* ofw_bus interface */
  131         DEVMETHOD(ofw_bus_get_devinfo,  mdionexus_ofw_get_devinfo),
  132         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  133         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  134         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  135         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  136         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  137 
  138         DEVMETHOD_END
  139 };
  140 
  141 DEFINE_CLASS_0(mdionexus, mdionexus_fdt_driver, mdionexus_fdt_methods,
  142     sizeof(struct mdionexus_softc));
  143 
  144 static devclass_t mdionexus_fdt_devclass;
  145 
  146 EARLY_DRIVER_MODULE(mdionexus, mrmlbus, mdionexus_fdt_driver,
  147     mdionexus_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
  148 
  149 static int mdionexus_ofw_fill_ranges(phandle_t, struct simplebus_softc *);
  150 static int mdionexus_ofw_bus_attach(device_t);
  151 
  152 static int
  153 mdionexus_fdt_probe(device_t dev)
  154 {
  155 
  156         if (!ofw_bus_status_okay(dev))
  157                 return (ENXIO);
  158 
  159         if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mdio-nexus"))
  160                 return (ENXIO);
  161 
  162         device_set_desc(dev, "Cavium ThunderX MDIO nexus");
  163         return (BUS_PROBE_SPECIFIC);
  164 }
  165 
  166 static int
  167 mdionexus_fdt_attach(device_t dev)
  168 {
  169         int err;
  170 
  171         err = mdionexus_ofw_bus_attach(dev);
  172         if (err != 0)
  173                 return (err);
  174 
  175         return (bus_generic_attach(dev));
  176 }
  177 
  178 /* OFW bus interface */
  179 struct mdionexus_ofw_devinfo {
  180         struct ofw_bus_devinfo  di_dinfo;
  181         struct resource_list    di_rl;
  182 };
  183 
  184 static const struct ofw_bus_devinfo *
  185 mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child)
  186 {
  187         struct mdionexus_ofw_devinfo *di;
  188 
  189         di = device_get_ivars(child);
  190         return (&di->di_dinfo);
  191 }
  192 
  193 /* Helper functions */
  194 
  195 static int
  196 mdionexus_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc)
  197 {
  198         int host_address_cells;
  199         cell_t *base_ranges;
  200         ssize_t nbase_ranges;
  201         int err;
  202         int i, j, k;
  203 
  204         err = OF_searchencprop(OF_parent(node), "#address-cells",
  205             &host_address_cells, sizeof(host_address_cells));
  206         if (err <= 0)
  207                 return (-1);
  208 
  209         nbase_ranges = OF_getproplen(node, "ranges");
  210         if (nbase_ranges < 0)
  211                 return (-1);
  212         sc->nranges = nbase_ranges / sizeof(cell_t) /
  213             (sc->acells + host_address_cells + sc->scells);
  214         if (sc->nranges == 0)
  215                 return (0);
  216 
  217         sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
  218             M_THUNDER_MDIO, M_WAITOK);
  219         base_ranges = malloc(nbase_ranges, M_THUNDER_MDIO, M_WAITOK);
  220         OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
  221 
  222         for (i = 0, j = 0; i < sc->nranges; i++) {
  223                 sc->ranges[i].bus = 0;
  224                 for (k = 0; k < sc->acells; k++) {
  225                         sc->ranges[i].bus <<= 32;
  226                         sc->ranges[i].bus |= base_ranges[j++];
  227                 }
  228                 sc->ranges[i].host = 0;
  229                 for (k = 0; k < host_address_cells; k++) {
  230                         sc->ranges[i].host <<= 32;
  231                         sc->ranges[i].host |= base_ranges[j++];
  232                 }
  233                 sc->ranges[i].size = 0;
  234                 for (k = 0; k < sc->scells; k++) {
  235                         sc->ranges[i].size <<= 32;
  236                         sc->ranges[i].size |= base_ranges[j++];
  237                 }
  238         }
  239 
  240         free(base_ranges, M_THUNDER_MDIO);
  241         return (sc->nranges);
  242 }
  243 
  244 static int
  245 mdionexus_ofw_bus_attach(device_t dev)
  246 {
  247         struct simplebus_softc *sc;
  248         struct mdionexus_ofw_devinfo *di;
  249         device_t child;
  250         phandle_t parent, node;
  251 
  252         parent = ofw_bus_get_node(dev);
  253         simplebus_init(dev, parent);
  254 
  255         sc = (struct simplebus_softc *)device_get_softc(dev);
  256 
  257         if (mdionexus_ofw_fill_ranges(parent, sc) < 0) {
  258                 device_printf(dev, "could not get ranges\n");
  259                 return (ENXIO);
  260         }
  261         /* Iterate through all bus subordinates */
  262         for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
  263                 /* Allocate and populate devinfo. */
  264                 di = malloc(sizeof(*di), M_THUNDER_MDIO, M_WAITOK | M_ZERO);
  265                 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
  266                         free(di, M_THUNDER_MDIO);
  267                         continue;
  268                 }
  269 
  270                 /* Initialize and populate resource list. */
  271                 resource_list_init(&di->di_rl);
  272                 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
  273                     &di->di_rl);
  274                 ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
  275 
  276                 /* Add newbus device for this FDT node */
  277                 child = device_add_child(dev, NULL, -1);
  278                 if (child == NULL) {
  279                         resource_list_free(&di->di_rl);
  280                         ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
  281                         free(di, M_THUNDER_MDIO);
  282                         continue;
  283                 }
  284 
  285                 device_set_ivars(child, di);
  286         }
  287 
  288         return (0);
  289 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/vnic/thunder_mdio_fdt.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/vnic/thunder_mdio_fdt.c
