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 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bitstring.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
40 #include <machine/intr.h>
41 #include <machine/resource.h>
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
47 #include <arm/arm/gic_common.h>
48 #include "gic_v3_reg.h"
49 #include "gic_v3_var.h"
54 static int gic_v3_fdt_probe(device_t);
55 static int gic_v3_fdt_attach(device_t);
57 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
58 static bus_get_resource_list_t gic_v3_fdt_get_resource_list;
60 static 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),
66 DEVMETHOD(bus_get_resource_list, gic_v3_fdt_get_resource_list),
67 DEVMETHOD(bus_get_device_path, ofw_bus_gen_get_device_path),
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),
81 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
82 sizeof(struct gic_v3_softc), gic_v3_driver);
84 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, 0, 0,
85 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
86 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, 0, 0,
87 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
90 * Helper functions declarations.
92 static int gic_v3_ofw_bus_attach(device_t);
98 gic_v3_fdt_probe(device_t dev)
101 if (!ofw_bus_status_okay(dev))
104 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
107 device_set_desc(dev, GIC_V3_DEVSTR);
108 return (BUS_PROBE_DEFAULT);
112 gic_v3_fdt_attach(device_t dev)
114 struct gic_v3_softc *sc;
115 pcell_t redist_regions;
118 uint32_t *mbi_ranges;
121 sc = device_get_softc(dev);
123 sc->gic_bus = GIC_BUS_FDT;
126 * Recover number of the Re-Distributor regions.
128 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
129 &redist_regions, sizeof(redist_regions)) <= 0)
130 sc->gic_redists.nregions = 1;
132 sc->gic_redists.nregions = redist_regions;
134 /* Add Message Based Interrupts using SPIs. */
135 ret = OF_getencprop_alloc_multi(ofw_bus_get_node(dev), "mbi-ranges",
136 sizeof(*mbi_ranges), (void **)&mbi_ranges);
139 /* Limit to a single range for now. */
140 sc->gic_mbi_start = mbi_ranges[0];
141 sc->gic_mbi_end = mbi_ranges[0] + mbi_ranges[1];
144 device_printf(dev, "Malformed mbi-ranges property\n");
146 free(mbi_ranges, M_OFWPROP);
149 err = gic_v3_attach(dev);
153 xref = OF_xref_from_node(ofw_bus_get_node(dev));
154 sc->gic_pic = intr_pic_register(dev, xref);
155 if (sc->gic_pic == NULL) {
156 device_printf(dev, "could not register PIC\n");
161 if (sc->gic_mbi_start > 0)
162 intr_msi_register(dev, xref);
165 OF_device_register_xref(xref, dev);
167 if (intr_pic_claim_root(dev, xref, arm_gic_v3_intr, sc,
168 GIC_LAST_SGI - GIC_FIRST_SGI + 1) != 0) {
174 * Try to register ITS to this GIC.
175 * GIC will act as a bus in that case.
176 * Failure here will not affect main GIC functionality.
178 if (gic_v3_ofw_bus_attach(dev) != 0) {
181 "Failed to attach ITS to this GIC\n");
185 if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) != 0)
186 sc->gic_nchildren = 0;
193 "Failed to attach. Error %d\n", err);
195 /* Failure so free resources */
201 /* OFW bus interface */
202 struct gic_v3_ofw_devinfo {
203 struct gic_v3_devinfo di_gic_dinfo;
204 struct ofw_bus_devinfo di_dinfo;
205 struct resource_list di_rl;
208 static const struct ofw_bus_devinfo *
209 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
211 struct gic_v3_ofw_devinfo *di;
213 di = device_get_ivars(child);
214 if (di->di_gic_dinfo.is_vgic)
216 return (&di->di_dinfo);
219 /* Helper functions */
221 gic_v3_ofw_fill_ranges(phandle_t parent, struct gic_v3_softc *sc,
222 pcell_t *addr_cellsp, pcell_t *size_cellsp)
224 pcell_t addr_cells, host_cells, size_cells;
226 ssize_t nbase_ranges;
230 OF_getencprop(OF_parent(parent), "#address-cells", &host_cells,
233 OF_getencprop(parent, "#address-cells", &addr_cells,
236 OF_getencprop(parent, "#size-cells", &size_cells,
239 *addr_cellsp = addr_cells;
240 *size_cellsp = size_cells;
242 nbase_ranges = OF_getproplen(parent, "ranges");
243 if (nbase_ranges < 0)
246 sc->nranges = nbase_ranges / sizeof(cell_t) /
247 (addr_cells + host_cells + size_cells);
248 if (sc->nranges == 0)
251 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), M_GIC_V3,
253 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
254 OF_getencprop(parent, "ranges", base_ranges, nbase_ranges);
256 for (i = 0, j = 0; i < sc->nranges; i++) {
257 sc->ranges[i].bus = 0;
258 for (k = 0; k < addr_cells; k++) {
259 sc->ranges[i].bus <<= 32;
260 sc->ranges[i].bus |= base_ranges[j++];
262 sc->ranges[i].host = 0;
263 for (k = 0; k < host_cells; k++) {
264 sc->ranges[i].host <<= 32;
265 sc->ranges[i].host |= base_ranges[j++];
267 sc->ranges[i].size = 0;
268 for (k = 0; k < size_cells; k++) {
269 sc->ranges[i].size <<= 32;
270 sc->ranges[i].size |= base_ranges[j++];
274 free(base_ranges, M_DEVBUF);
279 * Bus capability support for GICv3.
280 * Collects and configures device informations and finally
281 * adds ITS device as a child of GICv3 in Newbus hierarchy.
284 gic_v3_ofw_bus_attach(device_t dev)
286 struct gic_v3_ofw_devinfo *di;
287 struct gic_v3_softc *sc;
289 phandle_t parent, node;
290 pcell_t addr_cells, size_cells;
293 sc = device_get_softc(dev);
294 parent = ofw_bus_get_node(dev);
296 rv = gic_v3_ofw_fill_ranges(parent, sc, &addr_cells,
301 /* Iterate through all GIC subordinates */
302 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
304 * Ignore children that lack a compatible property.
305 * Some of them may be for configuration, for example
308 if (!OF_hasprop(node, "compatible"))
311 /* Allocate and populate devinfo. */
312 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
314 /* Read the numa node, or -1 if there is none */
315 if (OF_getencprop(node, "numa-node-id",
316 &di->di_gic_dinfo.gic_domain,
317 sizeof(di->di_gic_dinfo.gic_domain)) <= 0) {
318 di->di_gic_dinfo.gic_domain = -1;
321 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
324 "Could not set up devinfo for ITS\n");
330 /* Initialize and populate resource list. */
331 resource_list_init(&di->di_rl);
332 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
335 /* Should not have any interrupts, so don't add any */
337 /* Add newbus device for this FDT node */
338 child = device_add_child(dev, NULL, -1);
342 "Could not add child: %s\n",
343 di->di_dinfo.obd_name);
345 resource_list_free(&di->di_rl);
346 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
352 device_set_ivars(child, di);
357 * If there is a vgic maintanance interrupt add a virtual gic
358 * child so we can use this in the vmm module for bhyve.
360 if (OF_hasprop(parent, "interrupts")) {
361 child = device_add_child(dev, "vgic", -1);
363 device_printf(dev, "Could not add vgic child\n");
365 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
366 resource_list_init(&di->di_rl);
367 di->di_gic_dinfo.gic_domain = -1;
368 di->di_gic_dinfo.is_vgic = 1;
369 device_set_ivars(child, di);
374 return (bus_generic_attach(dev));
377 static struct resource_list *
378 gic_v3_fdt_get_resource_list(device_t bus, device_t child)
380 struct gic_v3_ofw_devinfo *di;
382 di = device_get_ivars(child);
383 KASSERT(di != NULL, ("%s: No devinfo", __func__));