thunder_mdio_fdt.c

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

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

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sys/dev/vnic/thunder_mdio_fdt.c