gic_v3_fdt.c revision 294731
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: head/sys/arm64/arm64/gic_v3_fdt.c 294731 2016-01-25 15:18:32Z zbb $"); 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 <machine/resource.h> 40 41#include <dev/ofw/openfirm.h> 42#include <dev/ofw/ofw_bus.h> 43#include <dev/ofw/ofw_bus_subr.h> 44 45#include "pic_if.h" 46 47#include "gic_v3_reg.h" 48#include "gic_v3_var.h" 49 50/* 51 * FDT glue. 52 */ 53static int gic_v3_fdt_probe(device_t); 54static int gic_v3_fdt_attach(device_t); 55 56static struct resource *gic_v3_ofw_bus_alloc_res(device_t, device_t, int, int *, 57 u_long, u_long, u_long, u_int); 58static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t); 59 60static device_method_t gic_v3_fdt_methods[] = { 61 /* Device interface */ 62 DEVMETHOD(device_probe, gic_v3_fdt_probe), 63 DEVMETHOD(device_attach, gic_v3_fdt_attach), 64 65 /* Bus interface */ 66 DEVMETHOD(bus_alloc_resource, gic_v3_ofw_bus_alloc_res), 67 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 68 69 /* ofw_bus interface */ 70 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo), 71 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 72 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 73 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 74 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 75 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 76 77 /* End */ 78 DEVMETHOD_END 79}; 80 81DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods, 82 sizeof(struct gic_v3_softc), gic_v3_driver); 83 84static devclass_t gic_v3_fdt_devclass; 85 86EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, gic_v3_fdt_devclass, 87 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); 88EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, gic_v3_fdt_devclass, 89 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); 90 91/* 92 * Helper functions declarations. 93 */ 94static int gic_v3_ofw_bus_attach(device_t); 95 96/* 97 * Device interface. 98 */ 99static int 100gic_v3_fdt_probe(device_t dev) 101{ 102 103 if (!ofw_bus_status_okay(dev)) 104 return (ENXIO); 105 106 if (!ofw_bus_is_compatible(dev, "arm,gic-v3")) 107 return (ENXIO); 108 109 device_set_desc(dev, GIC_V3_DEVSTR); 110 return (BUS_PROBE_DEFAULT); 111} 112 113static int 114gic_v3_fdt_attach(device_t dev) 115{ 116 struct gic_v3_softc *sc; 117 pcell_t redist_regions; 118 int err; 119 120 sc = device_get_softc(dev); 121 sc->dev = dev; 122 123 /* 124 * Recover number of the Re-Distributor regions. 125 */ 126 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions", 127 &redist_regions, sizeof(redist_regions)) <= 0) 128 sc->gic_redists.nregions = 1; 129 else 130 sc->gic_redists.nregions = redist_regions; 131 132 err = gic_v3_attach(dev); 133 if (err) 134 goto error; 135 /* 136 * Try to register ITS to this GIC. 137 * GIC will act as a bus in that case. 138 * Failure here will not affect main GIC functionality. 139 */ 140 if (gic_v3_ofw_bus_attach(dev) != 0) { 141 if (bootverbose) { 142 device_printf(dev, 143 "Failed to attach ITS to this GIC\n"); 144 } 145 } 146 147 return (err); 148 149error: 150 if (bootverbose) { 151 device_printf(dev, 152 "Failed to attach. Error %d\n", err); 153 } 154 /* Failure so free resources */ 155 gic_v3_detach(dev); 156 157 return (err); 158} 159 160/* OFW bus interface */ 161struct gic_v3_ofw_devinfo { 162 struct ofw_bus_devinfo di_dinfo; 163 struct resource_list di_rl; 164}; 165 166static const struct ofw_bus_devinfo * 167gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child) 168{ 169 struct gic_v3_ofw_devinfo *di; 170 171 di = device_get_ivars(child); 172 return (&di->di_dinfo); 173} 174 175static struct resource * 176gic_v3_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid, 177 u_long start, u_long end, u_long count, u_int flags) 178{ 179 struct gic_v3_ofw_devinfo *di; 180 struct resource_list_entry *rle; 181 int ranges_len; 182 183 if ((start == 0UL) && (end == ~0UL)) { 184 if ((di = device_get_ivars(child)) == NULL) 185 return (NULL); 186 if (type != SYS_RES_MEMORY) 187 return (NULL); 188 189 /* Find defaults for this rid */ 190 rle = resource_list_find(&di->di_rl, type, *rid); 191 if (rle == NULL) 192 return (NULL); 193 194 start = rle->start; 195 end = rle->end; 196 count = rle->count; 197 } 198 /* 199 * XXX: No ranges remap! 200 * Absolute address is expected. 201 */ 202 if (ofw_bus_has_prop(bus, "ranges")) { 203 ranges_len = OF_getproplen(ofw_bus_get_node(bus), "ranges"); 204 if (ranges_len != 0) { 205 if (bootverbose) { 206 device_printf(child, 207 "Ranges remap not supported\n"); 208 } 209 return (NULL); 210 } 211 } 212 return (bus_generic_alloc_resource(bus, child, type, rid, start, end, 213 count, flags)); 214} 215 216/* Helper functions */ 217 218/* 219 * Bus capability support for GICv3. 220 * Collects and configures device informations and finally 221 * adds ITS device as a child of GICv3 in Newbus hierarchy. 222 */ 223static int 224gic_v3_ofw_bus_attach(device_t dev) 225{ 226 struct gic_v3_ofw_devinfo *di; 227 device_t child; 228 phandle_t parent, node; 229 pcell_t addr_cells, size_cells; 230 231 parent = ofw_bus_get_node(dev); 232 if (parent > 0) { 233 addr_cells = 2; 234 OF_getencprop(parent, "#address-cells", &addr_cells, 235 sizeof(addr_cells)); 236 size_cells = 2; 237 OF_getencprop(parent, "#size-cells", &size_cells, 238 sizeof(size_cells)); 239 /* Iterate through all GIC subordinates */ 240 for (node = OF_child(parent); node > 0; node = OF_peer(node)) { 241 /* Allocate and populate devinfo. */ 242 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO); 243 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) { 244 if (bootverbose) { 245 device_printf(dev, 246 "Could not set up devinfo for ITS\n"); 247 } 248 free(di, M_GIC_V3); 249 continue; 250 } 251 252 /* Initialize and populate resource list. */ 253 resource_list_init(&di->di_rl); 254 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells, 255 &di->di_rl); 256 257 /* Should not have any interrupts, so don't add any */ 258 259 /* Add newbus device for this FDT node */ 260 child = device_add_child(dev, NULL, -1); 261 if (!child) { 262 if (bootverbose) { 263 device_printf(dev, 264 "Could not add child: %s\n", 265 di->di_dinfo.obd_name); 266 } 267 resource_list_free(&di->di_rl); 268 ofw_bus_gen_destroy_devinfo(&di->di_dinfo); 269 free(di, M_GIC_V3); 270 continue; 271 } 272 273 device_set_ivars(child, di); 274 } 275 } 276 277 return (bus_generic_attach(dev)); 278} 279 280static int gic_v3_its_fdt_probe(device_t dev); 281 282static device_method_t gic_v3_its_fdt_methods[] = { 283 /* Device interface */ 284 DEVMETHOD(device_probe, gic_v3_its_fdt_probe), 285 286 /* End */ 287 DEVMETHOD_END 288}; 289 290DEFINE_CLASS_1(its, gic_v3_its_fdt_driver, gic_v3_its_fdt_methods, 291 sizeof(struct gic_v3_its_softc), gic_v3_its_driver); 292 293static devclass_t gic_v3_its_fdt_devclass; 294 295EARLY_DRIVER_MODULE(its, gic, gic_v3_its_fdt_driver, 296 gic_v3_its_fdt_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); 297 298static int 299gic_v3_its_fdt_probe(device_t dev) 300{ 301 302 if (!ofw_bus_status_okay(dev)) 303 return (ENXIO); 304 305 if (!ofw_bus_is_compatible(dev, GIC_V3_ITS_COMPSTR)) 306 return (ENXIO); 307 308 device_set_desc(dev, GIC_V3_ITS_DEVSTR); 309 return (BUS_PROBE_DEFAULT); 310} 311