2 * Copyright (c) 2015 The FreeBSD Foundation
4 * This software was developed by Semihalf under
5 * the sponsorship of the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bitstring.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
38 #include <machine/intr.h>
39 #include <machine/resource.h>
41 #include <dev/ofw/openfirm.h>
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/ofw_bus_subr.h>
45 #include <arm/arm/gic_common.h>
46 #include "gic_v3_reg.h"
47 #include "gic_v3_var.h"
52 static int gic_v3_fdt_probe(device_t);
53 static int gic_v3_fdt_attach(device_t);
55 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
56 static bus_get_resource_list_t gic_v3_fdt_get_resource_list;
58 static device_method_t gic_v3_fdt_methods[] = {
59 /* Device interface */
60 DEVMETHOD(device_probe, gic_v3_fdt_probe),
61 DEVMETHOD(device_attach, gic_v3_fdt_attach),
64 DEVMETHOD(bus_get_resource_list, gic_v3_fdt_get_resource_list),
65 DEVMETHOD(bus_get_device_path, ofw_bus_gen_get_device_path),
67 /* ofw_bus interface */
68 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo),
69 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
70 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
71 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
72 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
73 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
79 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
80 sizeof(struct gic_v3_softc), gic_v3_driver);
82 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, 0, 0,
83 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
84 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, 0, 0,
85 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
88 * Helper functions declarations.
90 static int gic_v3_ofw_bus_attach(device_t);
96 gic_v3_fdt_probe(device_t dev)
99 if (!ofw_bus_status_okay(dev))
102 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
105 device_set_desc(dev, GIC_V3_DEVSTR);
106 return (BUS_PROBE_DEFAULT);
110 gic_v3_fdt_attach(device_t dev)
112 struct gic_v3_softc *sc;
113 pcell_t redist_regions;
116 uint32_t *mbi_ranges;
119 sc = device_get_softc(dev);
121 sc->gic_bus = GIC_BUS_FDT;
124 * Recover number of the Re-Distributor regions.
126 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
127 &redist_regions, sizeof(redist_regions)) <= 0)
128 sc->gic_redists.nregions = 1;
130 sc->gic_redists.nregions = redist_regions;
132 /* Add Message Based Interrupts using SPIs. */
133 ret = OF_getencprop_alloc_multi(ofw_bus_get_node(dev), "mbi-ranges",
134 sizeof(*mbi_ranges), (void **)&mbi_ranges);
137 /* Limit to a single range for now. */
138 sc->gic_mbi_start = mbi_ranges[0];
139 sc->gic_mbi_end = mbi_ranges[0] + mbi_ranges[1];
142 device_printf(dev, "Malformed mbi-ranges property\n");
144 free(mbi_ranges, M_OFWPROP);
147 err = gic_v3_attach(dev);
151 xref = OF_xref_from_node(ofw_bus_get_node(dev));
152 sc->gic_pic = intr_pic_register(dev, xref);
153 if (sc->gic_pic == NULL) {
154 device_printf(dev, "could not register PIC\n");
159 if (sc->gic_mbi_start > 0)
160 intr_msi_register(dev, xref);
163 OF_device_register_xref(xref, dev);
165 if (intr_pic_claim_root(dev, xref, arm_gic_v3_intr, sc,
166 GIC_LAST_SGI - GIC_FIRST_SGI + 1) != 0) {
172 * Try to register ITS to this GIC.
173 * GIC will act as a bus in that case.
174 * Failure here will not affect main GIC functionality.
176 if (gic_v3_ofw_bus_attach(dev) != 0) {
179 "Failed to attach ITS to this GIC\n");
183 if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) != 0)
184 sc->gic_nchildren = 0;
191 "Failed to attach. Error %d\n", err);
193 /* Failure so free resources */
199 /* OFW bus interface */
200 struct gic_v3_ofw_devinfo {
201 struct gic_v3_devinfo di_gic_dinfo;
202 struct ofw_bus_devinfo di_dinfo;
203 struct resource_list di_rl;
206 static const struct ofw_bus_devinfo *
207 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
209 struct gic_v3_ofw_devinfo *di;
211 di = device_get_ivars(child);
212 if (di->di_gic_dinfo.is_vgic)
214 return (&di->di_dinfo);
217 /* Helper functions */
219 gic_v3_ofw_fill_ranges(phandle_t parent, struct gic_v3_softc *sc,
220 pcell_t *addr_cellsp, pcell_t *size_cellsp)
222 pcell_t addr_cells, host_cells, size_cells;
224 ssize_t nbase_ranges;
228 OF_getencprop(OF_parent(parent), "#address-cells", &host_cells,
231 OF_getencprop(parent, "#address-cells", &addr_cells,
234 OF_getencprop(parent, "#size-cells", &size_cells,
237 *addr_cellsp = addr_cells;
238 *size_cellsp = size_cells;
240 nbase_ranges = OF_getproplen(parent, "ranges");
241 if (nbase_ranges < 0)
244 sc->nranges = nbase_ranges / sizeof(cell_t) /
245 (addr_cells + host_cells + size_cells);
246 if (sc->nranges == 0)
249 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), M_GIC_V3,
251 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
252 OF_getencprop(parent, "ranges", base_ranges, nbase_ranges);
254 for (i = 0, j = 0; i < sc->nranges; i++) {
255 sc->ranges[i].bus = 0;
256 for (k = 0; k < addr_cells; k++) {
257 sc->ranges[i].bus <<= 32;
258 sc->ranges[i].bus |= base_ranges[j++];
260 sc->ranges[i].host = 0;
261 for (k = 0; k < host_cells; k++) {
262 sc->ranges[i].host <<= 32;
263 sc->ranges[i].host |= base_ranges[j++];
265 sc->ranges[i].size = 0;
266 for (k = 0; k < size_cells; k++) {
267 sc->ranges[i].size <<= 32;
268 sc->ranges[i].size |= base_ranges[j++];
272 free(base_ranges, M_DEVBUF);
277 * Bus capability support for GICv3.
278 * Collects and configures device informations and finally
279 * adds ITS device as a child of GICv3 in Newbus hierarchy.
282 gic_v3_ofw_bus_attach(device_t dev)
284 struct gic_v3_ofw_devinfo *di;
285 struct gic_v3_softc *sc;
287 phandle_t parent, node;
288 pcell_t addr_cells, size_cells;
291 sc = device_get_softc(dev);
292 parent = ofw_bus_get_node(dev);
294 rv = gic_v3_ofw_fill_ranges(parent, sc, &addr_cells,
299 /* Iterate through all GIC subordinates */
300 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
302 * Ignore children that lack a compatible property.
303 * Some of them may be for configuration, for example
306 if (!OF_hasprop(node, "compatible"))
309 /* Allocate and populate devinfo. */
310 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
312 /* Read the numa node, or -1 if there is none */
313 if (OF_getencprop(node, "numa-node-id",
314 &di->di_gic_dinfo.gic_domain,
315 sizeof(di->di_gic_dinfo.gic_domain)) <= 0) {
316 di->di_gic_dinfo.gic_domain = -1;
319 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
322 "Could not set up devinfo for ITS\n");
328 /* Initialize and populate resource list. */
329 resource_list_init(&di->di_rl);
330 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
333 /* Should not have any interrupts, so don't add any */
335 /* Add newbus device for this FDT node */
336 child = device_add_child(dev, NULL, -1);
340 "Could not add child: %s\n",
341 di->di_dinfo.obd_name);
343 resource_list_free(&di->di_rl);
344 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
350 device_set_ivars(child, di);
355 * If there is a vgic maintanance interrupt add a virtual gic
356 * child so we can use this in the vmm module for bhyve.
358 if (OF_hasprop(parent, "interrupts")) {
359 child = device_add_child(dev, "vgic", -1);
361 device_printf(dev, "Could not add vgic child\n");
363 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
364 resource_list_init(&di->di_rl);
365 di->di_gic_dinfo.gic_domain = -1;
366 di->di_gic_dinfo.is_vgic = 1;
367 device_set_ivars(child, di);
372 return (bus_generic_attach(dev));
375 static struct resource_list *
376 gic_v3_fdt_get_resource_list(device_t bus, device_t child)
378 struct gic_v3_ofw_devinfo *di;
380 di = device_get_ivars(child);
381 KASSERT(di != NULL, ("%s: No devinfo", __func__));