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[src/trunk]: src/sys/dev/fdt Add mailbox and power-domain support.
details: https://anonhg.NetBSD.org/src/rev/5d66f1b63beb
branches: trunk
changeset: 362600:5d66f1b63beb
user: skrll <skrll%NetBSD.org@localhost>
date: Fri Mar 04 08:19:06 2022 +0000
description:
Add mailbox and power-domain support.
power-domain support is very rudimentary.
diffstat:
sys/dev/fdt/fdt_mbox.c | 183 ++++++++++++++++++++++++++++++++++++++++++
sys/dev/fdt/fdt_powerdomain.c | 148 +++++++++++++++++++++++++++++++++
sys/dev/fdt/fdtbus.c | 6 +-
sys/dev/fdt/fdtvar.h | 41 +++++++++-
sys/dev/fdt/files.fdt | 4 +-
5 files changed, 378 insertions(+), 4 deletions(-)
diffs (truncated from 476 to 300 lines):
diff -r 228a40eabd3c -r 5d66f1b63beb sys/dev/fdt/fdt_mbox.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/fdt_mbox.c Fri Mar 04 08:19:06 2022 +0000
@@ -0,0 +1,183 @@
+/* $NetBSD: fdt_mbox.c,v 1.1 2022/03/04 08:19:06 skrll Exp $ */
+
+/*-
+ * Copyright (c) 2022 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nick Hudson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: fdt_mbox.c,v 1.1 2022/03/04 08:19:06 skrll Exp $");
+
+#include <sys/param.h>
+
+#include <sys/bus.h>
+#include <sys/kmem.h>
+#include <sys/queue.h>
+
+#include <libfdt.h>
+#include <dev/fdt/fdtvar.h>
+
+
+struct fdtbus_mbox_controller {
+ device_t mc_dev;
+ int mc_phandle;
+
+ int mc_cells;
+
+ const struct fdtbus_mbox_controller_func *mc_funcs;
+
+ LIST_ENTRY(fdtbus_mbox_controller) mc_next;
+};
+
+static LIST_HEAD(, fdtbus_mbox_controller) fdtbus_mbox_controllers =
+ LIST_HEAD_INITIALIZER(fdtbus_mbox_controllers);
+
+int
+fdtbus_register_mbox_controller(device_t dev, int phandle,
+ const struct fdtbus_mbox_controller_func *funcs)
+{
+ struct fdtbus_mbox_controller *mc;
+
+ uint32_t cells;
+ if (of_getprop_uint32(phandle, "#mbox-cells", &cells) != 0) {
+ aprint_debug_dev(dev, "missing #mbox-cells");
+ return EINVAL;
+ }
+
+ mc = kmem_alloc(sizeof(*mc), KM_SLEEP);
+ mc->mc_dev = dev;
+ mc->mc_phandle = phandle;
+ mc->mc_funcs = funcs;
+ mc->mc_cells = cells;
+
+ LIST_INSERT_HEAD(&fdtbus_mbox_controllers, mc, mc_next);
+
+ return 0;
+}
+
+static struct fdtbus_mbox_controller *
+fdtbus_mbox_lookup(int phandle)
+{
+ struct fdtbus_mbox_controller *mc;
+
+ LIST_FOREACH(mc, &fdtbus_mbox_controllers, mc_next) {
+ if (mc->mc_phandle == phandle)
+ return mc;
+ }
+
+ return NULL;
+}
+
+struct fdtbus_mbox_channel *
+fdtbus_mbox_get_index(int phandle, u_int index, void (*cb)(void *), void *cbarg)
+{
+ struct fdtbus_mbox_controller *mc;
+ struct fdtbus_mbox_channel *mbox = NULL;
+ void *mbox_priv = NULL;
+ uint32_t *mboxes = NULL;
+ uint32_t *p;
+ u_int n;
+ int len, resid;
+
+ len = OF_getproplen(phandle, "mboxes");
+ if (len <= 0)
+ return NULL;
+
+ mboxes = kmem_alloc(len, KM_SLEEP);
+ if (OF_getprop(phandle, "mboxes", mboxes, len) != len) {
+ kmem_free(mboxes, len);
+ return NULL;
+ }
+
+ p = mboxes;
+ for (n = 0, resid = len; resid > 0; n++) {
+ const int mc_phandle =
+ fdtbus_get_phandle_from_native(be32toh(p[0]));
+
+ mc = fdtbus_mbox_lookup(mc_phandle);
+ if (mc == NULL)
+ break;
+
+ u_int mbox_cells = mc->mc_cells;
+ if (n == index) {
+ mbox_priv = mc->mc_funcs->mc_acquire(mc->mc_dev,
+ mbox_cells > 0 ? &p[1] : NULL, mbox_cells * 4,
+ cb, cbarg);
+ if (mbox_priv) {
+ mbox = kmem_alloc(sizeof(*mbox), KM_SLEEP);
+ mbox->mb_ctlr = mc;
+ mbox->mb_priv = mbox_priv;
+ }
+ break;
+ }
+ resid -= (mbox_cells + 1) * 4;
+ p += mbox_cells + 1;
+ }
+
+ if (mboxes)
+ kmem_free(mboxes, len);
+
+ return mbox;
+}
+
+struct fdtbus_mbox_channel *
+fdtbus_mbox_get(int phandle, const char *name, void (*cb)(void *), void *cbarg)
+{
+ u_int index;
+ int err;
+
+ err = fdtbus_get_index(phandle, "mbox-names", name, &index);
+ if (err != 0)
+ return NULL;
+
+ return fdtbus_mbox_get_index(phandle, index, cb, cbarg);
+}
+
+void
+fdtbus_mbox_put(struct fdtbus_mbox_channel *mbox)
+{
+ struct fdtbus_mbox_controller *mc = mbox->mb_ctlr;
+
+ mc->mc_funcs->mc_release(mc->mc_dev, mbox->mb_priv);
+ kmem_free(mbox, sizeof(*mbox));
+}
+
+int
+fdtbus_mbox_send(struct fdtbus_mbox_channel *mbox, const void *data, size_t len)
+{
+ struct fdtbus_mbox_controller * const mc = mbox->mb_ctlr;
+
+ return mc->mc_funcs->mc_send(mc->mc_dev, mbox->mb_priv, data, len);
+}
+
+int
+fdtbus_mbox_recv(struct fdtbus_mbox_channel *mbox, void *data, size_t len)
+{
+ struct fdtbus_mbox_controller * const mc = mbox->mb_ctlr;
+
+ return mc->mc_funcs->mc_recv(mc->mc_dev, mbox->mb_priv, data, len);
+}
diff -r 228a40eabd3c -r 5d66f1b63beb sys/dev/fdt/fdt_powerdomain.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/fdt_powerdomain.c Fri Mar 04 08:19:06 2022 +0000
@@ -0,0 +1,148 @@
+/* $NetBSD: fdt_powerdomain.c,v 1.1 2022/03/04 08:19:06 skrll Exp $ */
+
+/*-
+ * Copyright (c) 2022 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nick Hudson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: fdt_powerdomain.c,v 1.1 2022/03/04 08:19:06 skrll Exp $");
+
+#include <sys/param.h>
+
+#include <sys/bus.h>
+#include <sys/kmem.h>
+#include <sys/queue.h>
+
+#include <libfdt.h>
+#include <dev/fdt/fdtvar.h>
+
+
+struct fdtbus_powerdomain_controller {
+ device_t pdc_dev;
+ int pdc_phandle;
+
+ void *pdc_cookie;
+
+ int pdc_cells;
+
+ const struct fdtbus_powerdomain_controller_func *pdc_funcs;
+
+ LIST_ENTRY(fdtbus_powerdomain_controller) pdc_next;
+};
+
+static LIST_HEAD(, fdtbus_powerdomain_controller) fdtbus_powerdomain_controllers =
+ LIST_HEAD_INITIALIZER(fdtbus_powerdomain_controllers);
+
+int
+fdtbus_register_powerdomain_controller(device_t dev, int phandle,
+ const struct fdtbus_powerdomain_controller_func *funcs)
+{
+ struct fdtbus_powerdomain_controller *pdc;
+
+ uint32_t cells;
+ if (of_getprop_uint32(phandle, "#power-domain-cells", &cells) != 0) {
+ aprint_debug_dev(dev, "missing #power-domain-cells");
+ return EINVAL;
+ }
+
+ pdc = kmem_alloc(sizeof(*pdc), KM_SLEEP);
+ pdc->pdc_dev = dev;
+ pdc->pdc_phandle = phandle;
+ pdc->pdc_funcs = funcs;
+ pdc->pdc_cells = cells;
+
+ LIST_INSERT_HEAD(&fdtbus_powerdomain_controllers, pdc, pdc_next);
+
+ return 0;
+}
+
+static struct fdtbus_powerdomain_controller *
+fdtbus_powerdomain_lookup(int phandle)
+{
+ struct fdtbus_powerdomain_controller *pdc;
+
+ LIST_FOREACH(pdc, &fdtbus_powerdomain_controllers, pdc_next) {
+ if (pdc->pdc_phandle == phandle)
+ return pdc;
+ }
+
+ return NULL;
+}
+
+static int
+fdtbus_powerdomain_enable_internal(int phandle, int index, bool enable)
+{
+ int len;
+ const uint32_t *pds = fdtbus_get_prop(phandle, "power-domains", &len);
+
+ if (pds == NULL)
+ return EINVAL;
+
+ for (const uint32_t *pd = pds; pd < pds + len; index--) {
+ uint32_t pd_node =
+ fdtbus_get_phandle_from_native(be32toh(pd[0]));
+ struct fdtbus_powerdomain_controller *pdc =
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