mrml_bridge.c

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    1 /*
    2  * Copyright (C) 2016 Cavium Inc.
    3  * All rights reserved.
    4  *
    5  * Developed by Semihalf.
    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 #include "opt_platform.h"
   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 #include <sys/resource.h>
   39 #include <sys/rman.h>
   40 #include <sys/socket.h>
   41 #include <sys/queue.h>
   42 
   43 #include <dev/ofw/ofw_bus.h>
   44 #include <dev/ofw/ofw_bus_subr.h>
   45 #include <dev/fdt/simplebus.h>
   46 
   47 #include <machine/bus.h>
   48 #include <machine/resource.h>
   49 
   50 static MALLOC_DEFINE(M_MRMLB, "MRML bridge", "Cavium MRML bridge");
   51 
   52 static device_probe_t mrmlb_fdt_probe;
   53 static device_attach_t mrmlb_fdt_attach;
   54 
   55 static struct resource * mrmlb_ofw_bus_alloc_res(device_t, device_t, int, int *,
   56     rman_res_t, rman_res_t, rman_res_t, u_int);
   57 
   58 static const struct ofw_bus_devinfo * mrmlb_ofw_get_devinfo(device_t, device_t);
   59 
   60 static device_method_t mrmlbus_fdt_methods[] = {
   61         /* Device interface */
   62         DEVMETHOD(device_probe,         mrmlb_fdt_probe),
   63         DEVMETHOD(device_attach,        mrmlb_fdt_attach),
   64 
   65         /* Bus interface */
   66         DEVMETHOD(bus_alloc_resource,           mrmlb_ofw_bus_alloc_res),
   67         DEVMETHOD(bus_release_resource,         bus_generic_release_resource),
   68         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
   69 
   70         /* ofw_bus interface */
   71         DEVMETHOD(ofw_bus_get_devinfo,  mrmlb_ofw_get_devinfo),
   72         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   73         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   74         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   75         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   76         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
   77 
   78         DEVMETHOD_END
   79 };
   80 
   81 DEFINE_CLASS_0(mrmlbus, mrmlbus_fdt_driver, mrmlbus_fdt_methods,
   82     sizeof(struct simplebus_softc));
   83 
   84 static devclass_t mrmlbus_fdt_devclass;
   85 
   86 EARLY_DRIVER_MODULE(mrmlbus, pcib, mrmlbus_fdt_driver, mrmlbus_fdt_devclass, 0, 0,
   87     BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
   88 MODULE_VERSION(mrmlbus, 1);
   89 
   90 static int mrmlb_ofw_fill_ranges(phandle_t, struct simplebus_softc *);
   91 static int mrmlb_ofw_bus_attach(device_t);
   92 
   93 static int
   94 mrmlb_fdt_probe(device_t dev)
   95 {
   96 
   97         if (!ofw_bus_status_okay(dev))
   98                 return (ENXIO);
   99 
  100         if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mrml-bridge"))
  101                 return (ENXIO);
  102 
  103         device_set_desc(dev, "Cavium ThunderX MRML bridge");
  104         return (BUS_PROBE_SPECIFIC);
  105 }
  106 
  107 static int
  108 mrmlb_fdt_attach(device_t dev)
  109 {
  110         int err;
  111 
  112         err = mrmlb_ofw_bus_attach(dev);
  113         if (err != 0)
  114                 return (err);
  115 
  116         return (bus_generic_attach(dev));
  117 }
  118 
  119 /* OFW bus interface */
  120 struct mrmlb_ofw_devinfo {
  121         struct ofw_bus_devinfo  di_dinfo;
  122         struct resource_list    di_rl;
  123 };
  124 
  125 static const struct ofw_bus_devinfo *
  126 mrmlb_ofw_get_devinfo(device_t bus __unused, device_t child)
  127 {
  128         struct mrmlb_ofw_devinfo *di;
  129 
  130         di = device_get_ivars(child);
  131         return (&di->di_dinfo);
  132 }
  133 
  134 static struct resource *
  135 mrmlb_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
  136     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  137 {
  138         struct simplebus_softc *sc;
  139         struct mrmlb_ofw_devinfo *di;
  140         struct resource_list_entry *rle;
  141         int i;
  142 
  143         if (RMAN_IS_DEFAULT_RANGE(start, end)) {
  144                 if ((di = device_get_ivars(child)) == NULL)
  145                         return (NULL);
  146                 if (type == SYS_RES_IOPORT)
  147                     type = SYS_RES_MEMORY;
  148 
  149                 /* Find defaults for this rid */
  150                 rle = resource_list_find(&di->di_rl, type, *rid);
  151                 if (rle == NULL)
  152                         return (NULL);
  153 
  154                 start = rle->start;
  155                 end = rle->end;
  156                 count = rle->count;
  157         }
  158 
  159         sc = device_get_softc(bus);
  160 
  161         if (type == SYS_RES_MEMORY) {
  162                 /* Remap through ranges property */
  163                 for (i = 0; i < sc->nranges; i++) {
  164                         if (start >= sc->ranges[i].bus && end <
  165                             sc->ranges[i].bus + sc->ranges[i].size) {
  166                                 start -= sc->ranges[i].bus;
  167                                 start += sc->ranges[i].host;
  168                                 end -= sc->ranges[i].bus;
  169                                 end += sc->ranges[i].host;
  170                                 break;
  171                         }
  172                 }
  173 
  174                 if (i == sc->nranges && sc->nranges != 0) {
  175                         device_printf(bus, "Could not map resource "
  176                             "%#lx-%#lx\n", start, end);
  177                         return (NULL);
  178                 }
  179         }
  180 
  181         return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
  182             count, flags));
  183 }
  184 
  185 /* Helper functions */
  186 
  187 static int
  188 mrmlb_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc)
  189 {
  190         int host_address_cells;
  191         cell_t *base_ranges;
  192         ssize_t nbase_ranges;
  193         int err;
  194         int i, j, k;
  195 
  196         err = OF_searchencprop(OF_parent(node), "#address-cells",
  197             &host_address_cells, sizeof(host_address_cells));
  198         if (err <= 0)
  199                 return (-1);
  200 
  201         nbase_ranges = OF_getproplen(node, "ranges");
  202         if (nbase_ranges < 0)
  203                 return (-1);
  204         sc->nranges = nbase_ranges / sizeof(cell_t) /
  205             (sc->acells + host_address_cells + sc->scells);
  206         if (sc->nranges == 0)
  207                 return (0);
  208 
  209         sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
  210             M_MRMLB, M_WAITOK);
  211         base_ranges = malloc(nbase_ranges, M_MRMLB, M_WAITOK);
  212         OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
  213 
  214         for (i = 0, j = 0; i < sc->nranges; i++) {
  215                 sc->ranges[i].bus = 0;
  216                 for (k = 0; k < sc->acells; k++) {
  217                         sc->ranges[i].bus <<= 32;
  218                         sc->ranges[i].bus |= base_ranges[j++];
  219                 }
  220                 sc->ranges[i].host = 0;
  221                 for (k = 0; k < host_address_cells; k++) {
  222                         sc->ranges[i].host <<= 32;
  223                         sc->ranges[i].host |= base_ranges[j++];
  224                 }
  225                 sc->ranges[i].size = 0;
  226                 for (k = 0; k < sc->scells; k++) {
  227                         sc->ranges[i].size <<= 32;
  228                         sc->ranges[i].size |= base_ranges[j++];
  229                 }
  230         }
  231 
  232         free(base_ranges, M_MRMLB);
  233         return (sc->nranges);
  234 }
  235 
  236 static int
  237 mrmlb_ofw_bus_attach(device_t dev)
  238 {
  239         struct simplebus_softc *sc;
  240         struct mrmlb_ofw_devinfo *di;
  241         device_t child;
  242         phandle_t parent, node;
  243 
  244         parent = ofw_bus_get_node(dev);
  245         simplebus_init(dev, parent);
  246 
  247         sc = device_get_softc(dev);
  248 
  249         if (mrmlb_ofw_fill_ranges(parent, sc) < 0) {
  250                 device_printf(dev, "could not get ranges\n");
  251                 return (ENXIO);
  252         }
  253         /* Iterate through all bus subordinates */
  254         for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
  255                 /* Allocate and populate devinfo. */
  256                 di = malloc(sizeof(*di), M_MRMLB, M_WAITOK | M_ZERO);
  257                 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
  258                         free(di, M_MRMLB);
  259                         continue;
  260                 }
  261 
  262                 /* Initialize and populate resource list. */
  263                 resource_list_init(&di->di_rl);
  264                 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
  265                     &di->di_rl);
  266                 ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
  267 
  268                 /* Add newbus device for this FDT node */
  269                 child = device_add_child(dev, NULL, -1);
  270                 if (child == NULL) {
  271                         resource_list_free(&di->di_rl);
  272                         ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
  273                         free(di, M_MRMLB);
  274                         continue;
  275                 }
  276 
  277                 device_set_ivars(child, di);
  278         }
  279 
  280         return (0);
  281 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/vnic/mrml_bridge.c

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