2 * Copyright (c) 2016 The FreeBSD Foundation
5 * This software was developed by Andrew Turner under
6 * the sponsorship of the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/types.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
40 #include <sys/module.h>
43 #include <machine/intr.h>
44 #include <machine/resource.h>
46 #include <contrib/dev/acpica/include/acpi.h>
47 #include <dev/acpica/acpivar.h>
49 #include "gic_v3_reg.h"
50 #include "gic_v3_var.h"
52 struct gic_v3_acpi_devinfo {
53 struct gic_v3_devinfo di_gic_dinfo;
54 struct resource_list di_rl;
57 static device_identify_t gic_v3_acpi_identify;
58 static device_probe_t gic_v3_acpi_probe;
59 static device_attach_t gic_v3_acpi_attach;
60 static bus_alloc_resource_t gic_v3_acpi_bus_alloc_res;
62 static void gic_v3_acpi_bus_attach(device_t);
64 static device_method_t gic_v3_acpi_methods[] = {
65 /* Device interface */
66 DEVMETHOD(device_identify, gic_v3_acpi_identify),
67 DEVMETHOD(device_probe, gic_v3_acpi_probe),
68 DEVMETHOD(device_attach, gic_v3_acpi_attach),
71 DEVMETHOD(bus_alloc_resource, gic_v3_acpi_bus_alloc_res),
72 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
78 DEFINE_CLASS_1(gic, gic_v3_acpi_driver, gic_v3_acpi_methods,
79 sizeof(struct gic_v3_softc), gic_v3_driver);
81 static devclass_t gic_v3_acpi_devclass;
83 EARLY_DRIVER_MODULE(gic_v3, acpi, gic_v3_acpi_driver, gic_v3_acpi_devclass,
84 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
86 struct madt_table_data {
89 ACPI_MADT_GENERIC_DISTRIBUTOR *dist;
94 madt_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
96 struct madt_table_data *madt_data;
98 madt_data = (struct madt_table_data *)arg;
100 switch(entry->Type) {
101 case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
102 if (madt_data->dist != NULL) {
104 device_printf(madt_data->parent,
105 "gic: Already have a distributor table");
108 madt_data->dist = (ACPI_MADT_GENERIC_DISTRIBUTOR *)entry;
111 case ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR:
120 rdist_map(ACPI_SUBTABLE_HEADER *entry, void *arg)
122 ACPI_MADT_GENERIC_REDISTRIBUTOR *redist;
123 struct madt_table_data *madt_data;
125 madt_data = (struct madt_table_data *)arg;
127 switch(entry->Type) {
128 case ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR:
129 redist = (ACPI_MADT_GENERIC_REDISTRIBUTOR *)entry;
132 BUS_SET_RESOURCE(madt_data->parent, madt_data->dev,
133 SYS_RES_MEMORY, madt_data->count, redist->BaseAddress,
143 gic_v3_acpi_identify(driver_t *driver, device_t parent)
145 struct madt_table_data madt_data;
146 ACPI_TABLE_MADT *madt;
150 physaddr = acpi_find_table(ACPI_SIG_MADT);
154 madt = acpi_map_table(physaddr, ACPI_SIG_MADT);
156 device_printf(parent, "gic: Unable to map the MADT\n");
160 madt_data.parent = parent;
161 madt_data.dist = NULL;
164 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
165 madt_handler, &madt_data);
166 if (madt_data.dist == NULL) {
167 device_printf(parent,
168 "No gic interrupt or distributor table\n");
171 /* This is for the wrong GIC version */
172 if (madt_data.dist->Version != ACPI_MADT_GIC_VERSION_V3)
175 dev = BUS_ADD_CHILD(parent, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE,
178 device_printf(parent, "add gic child failed\n");
182 /* Add the MADT data */
183 BUS_SET_RESOURCE(parent, dev, SYS_RES_MEMORY, 0,
184 madt_data.dist->BaseAddress, 128 * 1024);
187 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
188 rdist_map, &madt_data);
190 acpi_set_private(dev, (void *)(uintptr_t)madt_data.dist->Version);
193 acpi_unmap_table(madt);
197 gic_v3_acpi_probe(device_t dev)
200 switch((uintptr_t)acpi_get_private(dev)) {
201 case ACPI_MADT_GIC_VERSION_V3:
207 device_set_desc(dev, GIC_V3_DEVSTR);
208 return (BUS_PROBE_NOWILDCARD);
212 madt_count_redistrib(ACPI_SUBTABLE_HEADER *entry, void *arg)
214 struct gic_v3_softc *sc = arg;
216 if (entry->Type == ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR)
217 sc->gic_redists.nregions++;
221 gic_v3_acpi_count_regions(device_t dev)
223 struct gic_v3_softc *sc;
224 ACPI_TABLE_MADT *madt;
227 sc = device_get_softc(dev);
229 physaddr = acpi_find_table(ACPI_SIG_MADT);
233 madt = acpi_map_table(physaddr, ACPI_SIG_MADT);
235 device_printf(dev, "Unable to map the MADT\n");
239 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
240 madt_count_redistrib, sc);
241 acpi_unmap_table(madt);
243 return (sc->gic_redists.nregions > 0 ? 0 : ENXIO);
247 gic_v3_acpi_attach(device_t dev)
249 struct gic_v3_softc *sc;
252 sc = device_get_softc(dev);
254 sc->gic_bus = GIC_BUS_ACPI;
256 err = gic_v3_acpi_count_regions(dev);
260 err = gic_v3_attach(dev);
264 sc->gic_pic = intr_pic_register(dev, ACPI_INTR_XREF);
265 if (sc->gic_pic == NULL) {
266 device_printf(dev, "could not register PIC\n");
271 if (intr_pic_claim_root(dev, ACPI_INTR_XREF, arm_gic_v3_intr, sc,
272 GIC_LAST_SGI - GIC_FIRST_SGI + 1) != 0) {
278 * Try to register the ITS driver to this GIC. The GIC will act as
279 * a bus in that case. Failure here will not affect the main GIC
282 gic_v3_acpi_bus_attach(dev);
284 if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) !=0)
285 sc->gic_nchildren = 0;
292 "Failed to attach. Error %d\n", err);
294 /* Failure so free resources */
301 gic_v3_add_children(ACPI_SUBTABLE_HEADER *entry, void *arg)
303 ACPI_MADT_GENERIC_TRANSLATOR *gict;
304 struct gic_v3_acpi_devinfo *di;
305 struct gic_v3_softc *sc;
310 if (entry->Type == ACPI_MADT_TYPE_GENERIC_TRANSLATOR) {
311 /* We have an ITS, add it as a child */
312 gict = (ACPI_MADT_GENERIC_TRANSLATOR *)entry;
314 sc = device_get_softc(dev);
316 child = device_add_child(dev, "its", -1);
320 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
321 resource_list_init(&di->di_rl);
322 resource_list_add(&di->di_rl, SYS_RES_MEMORY, 0,
323 gict->BaseAddress, gict->BaseAddress + 128 * 1024 - 1,
325 err = acpi_iort_its_lookup(gict->TranslationId, &xref, &pxm);
327 di->di_gic_dinfo.gic_domain = pxm;
328 di->di_gic_dinfo.msi_xref = xref;
330 di->di_gic_dinfo.gic_domain = -1;
331 di->di_gic_dinfo.msi_xref = ACPI_MSI_XREF;
334 device_set_ivars(child, di);
339 gic_v3_acpi_bus_attach(device_t dev)
341 ACPI_TABLE_MADT *madt;
344 physaddr = acpi_find_table(ACPI_SIG_MADT);
348 madt = acpi_map_table(physaddr, ACPI_SIG_MADT);
350 device_printf(dev, "Unable to map the MADT to add children\n");
354 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
355 gic_v3_add_children, dev);
357 acpi_unmap_table(madt);
359 bus_generic_attach(dev);
362 static struct resource *
363 gic_v3_acpi_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
364 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
366 struct gic_v3_acpi_devinfo *di;
367 struct resource_list_entry *rle;
369 /* We only allocate memory */
370 if (type != SYS_RES_MEMORY)
373 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
374 if ((di = device_get_ivars(child)) == NULL)
377 /* Find defaults for this rid */
378 rle = resource_list_find(&di->di_rl, type, *rid);
387 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,