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/param.h>
30 #include <sys/systm.h>
31 #include <sys/bitstring.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
37 #include <machine/intr.h>
38 #include <machine/resource.h>
40 #include <dev/ofw/openfirm.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
44 #include <arm/arm/gic_common.h>
45 #include "gic_v3_reg.h"
46 #include "gic_v3_var.h"
51 static int gic_v3_fdt_probe(device_t);
52 static int gic_v3_fdt_attach(device_t);
54 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
55 static bus_get_resource_list_t gic_v3_fdt_get_resource_list;
57 static device_method_t gic_v3_fdt_methods[] = {
58 /* Device interface */
59 DEVMETHOD(device_probe, gic_v3_fdt_probe),
60 DEVMETHOD(device_attach, gic_v3_fdt_attach),
63 DEVMETHOD(bus_get_resource_list, gic_v3_fdt_get_resource_list),
64 DEVMETHOD(bus_get_device_path, ofw_bus_gen_get_device_path),
66 /* ofw_bus interface */
67 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo),
68 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
69 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
70 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
71 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
72 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
78 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
79 sizeof(struct gic_v3_softc), gic_v3_driver);
81 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, 0, 0,
82 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
83 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, 0, 0,
84 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
87 * Helper functions declarations.
89 static int gic_v3_ofw_bus_attach(device_t);
95 gic_v3_fdt_probe(device_t dev)
98 if (!ofw_bus_status_okay(dev))
101 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
104 device_set_desc(dev, GIC_V3_DEVSTR);
105 return (BUS_PROBE_DEFAULT);
109 gic_v3_fdt_attach(device_t dev)
111 struct gic_v3_softc *sc;
112 pcell_t redist_regions;
115 uint32_t *mbi_ranges;
118 sc = device_get_softc(dev);
120 sc->gic_bus = GIC_BUS_FDT;
123 * Recover number of the Re-Distributor regions.
125 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
126 &redist_regions, sizeof(redist_regions)) <= 0)
127 sc->gic_redists.nregions = 1;
129 sc->gic_redists.nregions = redist_regions;
131 /* Add Message Based Interrupts using SPIs. */
132 ret = OF_getencprop_alloc_multi(ofw_bus_get_node(dev), "mbi-ranges",
133 sizeof(*mbi_ranges), (void **)&mbi_ranges);
136 /* Limit to a single range for now. */
137 sc->gic_mbi_start = mbi_ranges[0];
138 sc->gic_mbi_end = mbi_ranges[0] + mbi_ranges[1];
141 device_printf(dev, "Malformed mbi-ranges property\n");
143 free(mbi_ranges, M_OFWPROP);
146 err = gic_v3_attach(dev);
150 xref = OF_xref_from_node(ofw_bus_get_node(dev));
151 sc->gic_pic = intr_pic_register(dev, xref);
152 if (sc->gic_pic == NULL) {
153 device_printf(dev, "could not register PIC\n");
158 if (sc->gic_mbi_start > 0)
159 intr_msi_register(dev, xref);
162 OF_device_register_xref(xref, dev);
164 if (intr_pic_claim_root(dev, xref, arm_gic_v3_intr, sc) != 0) {
170 err = intr_ipi_pic_register(dev, 0);
172 device_printf(dev, "could not register for IPIs\n");
178 * Try to register ITS to this GIC.
179 * GIC will act as a bus in that case.
180 * Failure here will not affect main GIC functionality.
182 if (gic_v3_ofw_bus_attach(dev) != 0) {
185 "Failed to attach ITS to this GIC\n");
189 if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) != 0)
190 sc->gic_nchildren = 0;
197 "Failed to attach. Error %d\n", err);
199 /* Failure so free resources */
205 /* OFW bus interface */
206 struct gic_v3_ofw_devinfo {
207 struct gic_v3_devinfo di_gic_dinfo;
208 struct ofw_bus_devinfo di_dinfo;
209 struct resource_list di_rl;
212 static const struct ofw_bus_devinfo *
213 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
215 struct gic_v3_ofw_devinfo *di;
217 di = device_get_ivars(child);
218 if (di->di_gic_dinfo.is_vgic)
220 return (&di->di_dinfo);
223 /* Helper functions */
225 gic_v3_ofw_fill_ranges(phandle_t parent, struct gic_v3_softc *sc,
226 pcell_t *addr_cellsp, pcell_t *size_cellsp)
228 pcell_t addr_cells, host_cells, size_cells;
230 ssize_t nbase_ranges;
234 OF_getencprop(OF_parent(parent), "#address-cells", &host_cells,
237 OF_getencprop(parent, "#address-cells", &addr_cells,
240 OF_getencprop(parent, "#size-cells", &size_cells,
243 *addr_cellsp = addr_cells;
244 *size_cellsp = size_cells;
246 nbase_ranges = OF_getproplen(parent, "ranges");
247 if (nbase_ranges < 0)
250 sc->nranges = nbase_ranges / sizeof(cell_t) /
251 (addr_cells + host_cells + size_cells);
252 if (sc->nranges == 0)
255 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), M_GIC_V3,
257 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
258 OF_getencprop(parent, "ranges", base_ranges, nbase_ranges);
260 for (i = 0, j = 0; i < sc->nranges; i++) {
261 sc->ranges[i].bus = 0;
262 for (k = 0; k < addr_cells; k++) {
263 sc->ranges[i].bus <<= 32;
264 sc->ranges[i].bus |= base_ranges[j++];
266 sc->ranges[i].host = 0;
267 for (k = 0; k < host_cells; k++) {
268 sc->ranges[i].host <<= 32;
269 sc->ranges[i].host |= base_ranges[j++];
271 sc->ranges[i].size = 0;
272 for (k = 0; k < size_cells; k++) {
273 sc->ranges[i].size <<= 32;
274 sc->ranges[i].size |= base_ranges[j++];
278 free(base_ranges, M_DEVBUF);
283 * Bus capability support for GICv3.
284 * Collects and configures device informations and finally
285 * adds ITS device as a child of GICv3 in Newbus hierarchy.
288 gic_v3_ofw_bus_attach(device_t dev)
290 struct gic_v3_ofw_devinfo *di;
291 struct gic_v3_softc *sc;
293 phandle_t parent, node;
294 pcell_t addr_cells, size_cells;
297 sc = device_get_softc(dev);
298 parent = ofw_bus_get_node(dev);
300 rv = gic_v3_ofw_fill_ranges(parent, sc, &addr_cells,
305 /* Iterate through all GIC subordinates */
306 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
308 * Ignore children that lack a compatible property.
309 * Some of them may be for configuration, for example
312 if (!OF_hasprop(node, "compatible"))
315 /* Allocate and populate devinfo. */
316 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
318 /* Read the numa node, or -1 if there is none */
319 if (OF_getencprop(node, "numa-node-id",
320 &di->di_gic_dinfo.gic_domain,
321 sizeof(di->di_gic_dinfo.gic_domain)) <= 0) {
322 di->di_gic_dinfo.gic_domain = -1;
325 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
328 "Could not set up devinfo for ITS\n");
334 /* Initialize and populate resource list. */
335 resource_list_init(&di->di_rl);
336 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
339 /* Should not have any interrupts, so don't add any */
341 /* Add newbus device for this FDT node */
342 child = device_add_child(dev, NULL, -1);
346 "Could not add child: %s\n",
347 di->di_dinfo.obd_name);
349 resource_list_free(&di->di_rl);
350 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
356 device_set_ivars(child, di);
361 * If there is a vgic maintanance interrupt add a virtual gic
362 * child so we can use this in the vmm module for bhyve.
364 if (OF_hasprop(parent, "interrupts")) {
365 child = device_add_child(dev, "vgic", -1);
367 device_printf(dev, "Could not add vgic child\n");
369 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
370 resource_list_init(&di->di_rl);
371 di->di_gic_dinfo.gic_domain = -1;
372 di->di_gic_dinfo.is_vgic = 1;
373 device_set_ivars(child, di);
378 return (bus_generic_attach(dev));
381 static struct resource_list *
382 gic_v3_fdt_get_resource_list(device_t bus, device_t child)
384 struct gic_v3_ofw_devinfo *di;
386 di = device_get_ivars(child);
387 KASSERT(di != NULL, ("%s: No devinfo", __func__));