gic_v3_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: releng/11.2/sys/arm64/arm64/gic_v3_fdt.c 305529 2016-09-07 12:10:30Z andrew $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/bitstring.h>
   36 #include <sys/bus.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/rman.h>
   40 
   41 #include <machine/intr.h>
   42 #include <machine/resource.h>
   43 
   44 #include <dev/ofw/openfirm.h>
   45 #include <dev/ofw/ofw_bus.h>
   46 #include <dev/ofw/ofw_bus_subr.h>
   47 
   48 #include "gic_v3_reg.h"
   49 #include "gic_v3_var.h"
   50 
   51 /*
   52  * FDT glue.
   53  */
   54 static int gic_v3_fdt_probe(device_t);
   55 static int gic_v3_fdt_attach(device_t);
   56 static int gic_v3_fdt_print_child(device_t, device_t);
   57 
   58 static struct resource *gic_v3_ofw_bus_alloc_res(device_t, device_t, int, int *,
   59     rman_res_t, rman_res_t, rman_res_t, u_int);
   60 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
   61 
   62 static device_method_t gic_v3_fdt_methods[] = {
   63         /* Device interface */
   64         DEVMETHOD(device_probe,         gic_v3_fdt_probe),
   65         DEVMETHOD(device_attach,        gic_v3_fdt_attach),
   66 
   67         /* Bus interface */
   68         DEVMETHOD(bus_print_child,              gic_v3_fdt_print_child),
   69         DEVMETHOD(bus_alloc_resource,           gic_v3_ofw_bus_alloc_res),
   70         DEVMETHOD(bus_activate_resource,        bus_generic_activate_resource),
   71 
   72         /* ofw_bus interface */
   73         DEVMETHOD(ofw_bus_get_devinfo,  gic_v3_ofw_get_devinfo),
   74         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   75         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   76         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   77         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   78         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
   79 
   80         /* End */
   81         DEVMETHOD_END
   82 };
   83 
   84 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
   85     sizeof(struct gic_v3_softc), gic_v3_driver);
   86 
   87 static devclass_t gic_v3_fdt_devclass;
   88 
   89 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
   90     0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
   91 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
   92     0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
   93 
   94 /*
   95  * Helper functions declarations.
   96  */
   97 static int gic_v3_ofw_bus_attach(device_t);
   98 
   99 /*
  100  * Device interface.
  101  */
  102 static int
  103 gic_v3_fdt_probe(device_t dev)
  104 {
  105 
  106         if (!ofw_bus_status_okay(dev))
  107                 return (ENXIO);
  108 
  109         if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
  110                 return (ENXIO);
  111 
  112         device_set_desc(dev, GIC_V3_DEVSTR);
  113         return (BUS_PROBE_DEFAULT);
  114 }
  115 
  116 static int
  117 gic_v3_fdt_attach(device_t dev)
  118 {
  119         struct gic_v3_softc *sc;
  120         pcell_t redist_regions;
  121         intptr_t xref;
  122         int err;
  123 
  124         sc = device_get_softc(dev);
  125         sc->dev = dev;
  126 
  127         /*
  128          * Recover number of the Re-Distributor regions.
  129          */
  130         if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
  131             &redist_regions, sizeof(redist_regions)) <= 0)
  132                 sc->gic_redists.nregions = 1;
  133         else
  134                 sc->gic_redists.nregions = redist_regions;
  135 
  136         err = gic_v3_attach(dev);
  137         if (err != 0)
  138                 goto error;
  139 
  140         xref = OF_xref_from_node(ofw_bus_get_node(dev));
  141         sc->gic_pic = intr_pic_register(dev, xref);
  142         if (sc->gic_pic == NULL) {
  143                 device_printf(dev, "could not register PIC\n");
  144                 err = ENXIO;
  145                 goto error;
  146         }
  147 
  148         if (intr_pic_claim_root(dev, xref, arm_gic_v3_intr, sc,
  149             GIC_LAST_SGI - GIC_FIRST_SGI + 1) != 0) {
  150                 err = ENXIO;
  151                 goto error;
  152         }
  153 
  154         /*
  155          * Try to register ITS to this GIC.
  156          * GIC will act as a bus in that case.
  157          * Failure here will not affect main GIC functionality.
  158          */
  159         if (gic_v3_ofw_bus_attach(dev) != 0) {
  160                 if (bootverbose) {
  161                         device_printf(dev,
  162                             "Failed to attach ITS to this GIC\n");
  163                 }
  164         }
  165 
  166         if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) != 0)
  167                 sc->gic_nchildren = 0;
  168 
  169         return (err);
  170 
  171 error:
  172         if (bootverbose) {
  173                 device_printf(dev,
  174                     "Failed to attach. Error %d\n", err);
  175         }
  176         /* Failure so free resources */
  177         gic_v3_detach(dev);
  178 
  179         return (err);
  180 }
  181 
  182 /* OFW bus interface */
  183 struct gic_v3_ofw_devinfo {
  184         struct ofw_bus_devinfo  di_dinfo;
  185         struct resource_list    di_rl;
  186 };
  187 
  188 static int
  189 gic_v3_fdt_print_child(device_t bus, device_t child)
  190 {
  191         struct gic_v3_ofw_devinfo *di = device_get_ivars(child);
  192         struct resource_list *rl = &di->di_rl;
  193         int retval = 0;
  194 
  195         retval += bus_print_child_header(bus, child);
  196         retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
  197         retval += bus_print_child_footer(bus, child);
  198 
  199         return (retval);
  200 }
  201 
  202 static const struct ofw_bus_devinfo *
  203 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
  204 {
  205         struct gic_v3_ofw_devinfo *di;
  206 
  207         di = device_get_ivars(child);
  208         return (&di->di_dinfo);
  209 }
  210 
  211 static struct resource *
  212 gic_v3_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
  213     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  214 {
  215         struct gic_v3_ofw_devinfo *di;
  216         struct resource_list_entry *rle;
  217         int ranges_len;
  218 
  219         if (RMAN_IS_DEFAULT_RANGE(start, end)) {
  220                 if ((di = device_get_ivars(child)) == NULL)
  221                         return (NULL);
  222                 if (type != SYS_RES_MEMORY)
  223                         return (NULL);
  224 
  225                 /* Find defaults for this rid */
  226                 rle = resource_list_find(&di->di_rl, type, *rid);
  227                 if (rle == NULL)
  228                         return (NULL);
  229 
  230                 start = rle->start;
  231                 end = rle->end;
  232                 count = rle->count;
  233         }
  234         /*
  235          * XXX: No ranges remap!
  236          *      Absolute address is expected.
  237          */
  238         if (ofw_bus_has_prop(bus, "ranges")) {
  239                 ranges_len = OF_getproplen(ofw_bus_get_node(bus), "ranges");
  240                 if (ranges_len != 0) {
  241                         if (bootverbose) {
  242                                 device_printf(child,
  243                                     "Ranges remap not supported\n");
  244                         }
  245                         return (NULL);
  246                 }
  247         }
  248         return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
  249             count, flags));
  250 }
  251 
  252 /* Helper functions */
  253 
  254 /*
  255  * Bus capability support for GICv3.
  256  * Collects and configures device informations and finally
  257  * adds ITS device as a child of GICv3 in Newbus hierarchy.
  258  */
  259 static int
  260 gic_v3_ofw_bus_attach(device_t dev)
  261 {
  262         struct gic_v3_ofw_devinfo *di;
  263         device_t child;
  264         phandle_t parent, node;
  265         pcell_t addr_cells, size_cells;
  266 
  267         parent = ofw_bus_get_node(dev);
  268         if (parent > 0) {
  269                 addr_cells = 2;
  270                 OF_getencprop(parent, "#address-cells", &addr_cells,
  271                     sizeof(addr_cells));
  272                 size_cells = 2;
  273                 OF_getencprop(parent, "#size-cells", &size_cells,
  274                     sizeof(size_cells));
  275                 /* Iterate through all GIC subordinates */
  276                 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
  277                         /* Allocate and populate devinfo. */
  278                         di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
  279                         if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
  280                                 if (bootverbose) {
  281                                         device_printf(dev,
  282                                             "Could not set up devinfo for ITS\n");
  283                                 }
  284                                 free(di, M_GIC_V3);
  285                                 continue;
  286                         }
  287 
  288                         /* Initialize and populate resource list. */
  289                         resource_list_init(&di->di_rl);
  290                         ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
  291                             &di->di_rl);
  292 
  293                         /* Should not have any interrupts, so don't add any */
  294 
  295                         /* Add newbus device for this FDT node */
  296                         child = device_add_child(dev, NULL, -1);
  297                         if (!child) {
  298                                 if (bootverbose) {
  299                                         device_printf(dev,
  300                                             "Could not add child: %s\n",
  301                                             di->di_dinfo.obd_name);
  302                                 }
  303                                 resource_list_free(&di->di_rl);
  304                                 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
  305                                 free(di, M_GIC_V3);
  306                                 continue;
  307                         }
  308 
  309                         device_set_ivars(child, di);
  310                 }
  311         }
  312 
  313         return (bus_generic_attach(dev));
  314 }
Cache object: c74e0c0fb1431753740c72b110969415
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sys/arm64/arm64/gic_v3_fdt.c
