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Index: head/share/man/man4/Makefile
===================================================================
--- head/share/man/man4/Makefile
+++ head/share/man/man4/Makefile
@@ -46,6 +46,7 @@
amdpm.4 \
${_amdsbwd.4} \
${_amdsmb.4} \
+ ${_amdsmn.4} \
${_amdtemp.4} \
${_bxe.4} \
amr.4 \
@@ -769,6 +770,7 @@
_aibs.4= aibs.4
_amdsbwd.4= amdsbwd.4
_amdsmb.4= amdsmb.4
+_amdsmn.4= amdsmn.4
_amdtemp.4= amdtemp.4
_asmc.4= asmc.4
_bxe.4= bxe.4
Index: head/share/man/man4/amdsmn.4
===================================================================
--- head/share/man/man4/amdsmn.4
+++ head/share/man/man4/amdsmn.4
@@ -0,0 +1,64 @@
+.\"-
+.\" Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" 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 AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd September 5, 2017
+.Dt AMDSMN 4
+.Os
+.Sh NAME
+.Nm amdsmn
+.Nd device driver for
+.Tn AMD
+processor System Management Network
+.Sh SYNOPSIS
+To compile this driver into the kernel, place the following line in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device amdsmn"
+.Ed
+.Pp
+Alternatively, to load the driver as a module at boot time, place the
+following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+amdsmn_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for resources on the System Management Network bus
+in
+.Tn AMD
+Family 17h processors.
+.Sh SEE ALSO
+.Xr loader 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 12.0 .
+.Sh AUTHORS
+.An Conrad Meyer Aq Mt cem@FreeBSD.org
Index: head/sys/amd64/conf/NOTES
===================================================================
--- head/sys/amd64/conf/NOTES
+++ head/sys/amd64/conf/NOTES
@@ -589,6 +589,11 @@
options ENABLE_ALART # Control alarm on Intel intpm driver
#
+# AMD System Management Network (SMN)
+#
+device amdsmn
+
+#
# Number of initial kernel page table pages used for early bootstrap.
# This number should include enough pages to map the kernel and any
# modules or other data loaded with the kernel by the loader. Each
Index: head/sys/boot/forth/loader.conf
===================================================================
--- head/sys/boot/forth/loader.conf
+++ head/sys/boot/forth/loader.conf
@@ -525,6 +525,7 @@
vkbd_load="NO" # Virtual AT keyboard interface
vpd_load="NO" # Vital Product Data kernel interface
vpo_load="NO" # Parallel to SCSI interface driver
+amdsmn_load="NO" # AMD Family 17h System Management Network
amdtemp_load="NO" # AMD K8/K10/K11 temperature monitor
tpm_load="NO" # Trusted Platform Module
wbwd_load="NO" # Winbond watchdog
Index: head/sys/conf/files.amd64
===================================================================
--- head/sys/conf/files.amd64
+++ head/sys/conf/files.amd64
@@ -198,6 +198,7 @@
dev/agp/agp_i810.c optional agp
dev/agp/agp_via.c optional agp
dev/amdsbwd/amdsbwd.c optional amdsbwd
+dev/amdsmn/amdsmn.c optional amdsmn
dev/amdtemp/amdtemp.c optional amdtemp
dev/arcmsr/arcmsr.c optional arcmsr pci
dev/asmc/asmc.c optional asmc isa
Index: head/sys/conf/files.i386
===================================================================
--- head/sys/conf/files.i386
+++ head/sys/conf/files.i386
@@ -152,6 +152,7 @@
dev/agp/agp_via.c optional agp
dev/aic/aic_isa.c optional aic isa
dev/amdsbwd/amdsbwd.c optional amdsbwd
+dev/amdsmn/amdsmn.c optional amdsmn
dev/amdtemp/amdtemp.c optional amdtemp
dev/arcmsr/arcmsr.c optional arcmsr pci
dev/asmc/asmc.c optional asmc isa
Index: head/sys/dev/amdsmn/amdsmn.h
===================================================================
--- head/sys/dev/amdsmn/amdsmn.h
+++ head/sys/dev/amdsmn/amdsmn.h
@@ -0,0 +1,32 @@
+/*-
+ * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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 AUTHOR ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#pragma once
+
+int amdsmn_read(device_t dev, uint32_t addr, uint32_t *value);
+int amdsmn_write(device_t dev, uint32_t addr, uint32_t value);
Index: head/sys/dev/amdsmn/amdsmn.c
===================================================================
--- head/sys/dev/amdsmn/amdsmn.c
+++ head/sys/dev/amdsmn/amdsmn.c
@@ -0,0 +1,186 @@
+/*-
+ * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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 AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * Driver for the AMD Family 17h CPU System Management Network.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/lock.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+
+#include <machine/cpufunc.h>
+#include <machine/md_var.h>
+#include <machine/specialreg.h>
+
+#include <dev/pci/pcivar.h>
+#include <x86/pci_cfgreg.h>
+
+#include <dev/amdsmn/amdsmn.h>
+
+#define SMN_ADDR_REG 0x60
+#define SMN_DATA_REG 0x64
+
+struct amdsmn_softc {
+ struct mtx smn_lock;
+};
+
+static struct pciid {
+ uint32_t device_id;
+} amdsmn_ids[] = {
+ { 0x14501022 },
+};
+
+/*
+ * Device methods.
+ */
+static void amdsmn_identify(driver_t *driver, device_t parent);
+static int amdsmn_probe(device_t dev);
+static int amdsmn_attach(device_t dev);
+static int amdsmn_detach(device_t dev);
+
+static device_method_t amdsmn_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_identify, amdsmn_identify),
+ DEVMETHOD(device_probe, amdsmn_probe),
+ DEVMETHOD(device_attach, amdsmn_attach),
+ DEVMETHOD(device_detach, amdsmn_detach),
+ DEVMETHOD_END
+};
+
+static driver_t amdsmn_driver = {
+ "amdsmn",
+ amdsmn_methods,
+ sizeof(struct amdsmn_softc),
+};
+
+static devclass_t amdsmn_devclass;
+DRIVER_MODULE(amdsmn, hostb, amdsmn_driver, amdsmn_devclass, NULL, NULL);
+MODULE_VERSION(amdsmn, 1);
+
+static void
+amdsmn_identify(driver_t *driver, device_t parent)
+{
+ device_t child;
+ uint32_t devid;
+ size_t i;
+
+ /* Make sure we're not being doubly invoked. */
+ if (device_find_child(parent, "amdsmn", -1) != NULL)
+ return;
+
+ devid = pci_get_devid(parent);
+ for (i = 0; i < nitems(amdsmn_ids); i++)
+ if (amdsmn_ids[i].device_id == devid)
+ break;
+
+ if (i >= nitems(amdsmn_ids))
+ return;
+
+ child = device_add_child(parent, "amdsmn", -1);
+ if (child == NULL)
+ device_printf(parent, "add amdsmn child failed\n");
+}
+
+static int
+amdsmn_probe(device_t dev)
+{
+ uint32_t family;
+
+ if (resource_disabled("amdsmn", 0))
+ return (ENXIO);
+
+ family = CPUID_TO_FAMILY(cpu_id);
+
+ switch (family) {
+ case 0x17:
+ break;
+ default:
+ return (ENXIO);
+ }
+ device_set_desc(dev, "AMD Family 17h System Management Network");
+
+ return (BUS_PROBE_GENERIC);
+}
+
+static int
+amdsmn_attach(device_t dev)
+{
+ struct amdsmn_softc *sc = device_get_softc(dev);
+
+ mtx_init(&sc->smn_lock, "SMN mtx", "SMN", MTX_DEF);
+ return (0);
+}
+
+int
+amdsmn_detach(device_t dev)
+{
+ struct amdsmn_softc *sc = device_get_softc(dev);
+
+ mtx_destroy(&sc->smn_lock);
+ return (0);
+}
+
+int
+amdsmn_read(device_t dev, uint32_t addr, uint32_t *value)
+{
+ struct amdsmn_softc *sc = device_get_softc(dev);
+ device_t parent;
+
+ parent = device_get_parent(dev);
+
+ mtx_lock(&sc->smn_lock);
+ pci_write_config(parent, SMN_ADDR_REG, addr, 4);
+ *value = pci_read_config(parent, SMN_DATA_REG, 4);
+ mtx_unlock(&sc->smn_lock);
+
+ return (0);
+}
+
+int
+amdsmn_write(device_t dev, uint32_t addr, uint32_t value)
+{
+ struct amdsmn_softc *sc = device_get_softc(dev);
+ device_t parent;
+
+ parent = device_get_parent(dev);
+
+ mtx_lock(&sc->smn_lock);
+ pci_write_config(parent, SMN_ADDR_REG, addr, 4);
+ pci_write_config(parent, SMN_DATA_REG, value, 4);
+ mtx_unlock(&sc->smn_lock);
+
+ return (0);
+}
Index: head/sys/modules/Makefile
===================================================================
--- head/sys/modules/Makefile
+++ head/sys/modules/Makefile
@@ -35,6 +35,7 @@
alq \
${_amd_ecc_inject} \
${_amdsbwd} \
+ ${_amdsmn} \
${_amdtemp} \
amr \
${_an} \
@@ -626,6 +627,7 @@
.endif
_amd_ecc_inject=amd_ecc_inject
_amdsbwd= amdsbwd
+_amdsmn= amdsmn
_amdtemp= amdtemp
_arcmsr= arcmsr
_asmc= asmc
Index: head/sys/modules/amdsmn/Makefile
===================================================================
--- head/sys/modules/amdsmn/Makefile
+++ head/sys/modules/amdsmn/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+.PATH: ${SRCTOP}/sys/dev/amdsmn
+
+KMOD= amdsmn
+SRCS= amdsmn.c bus_if.h device_if.h pci_if.h
+
+.include <bsd.kmod.mk>

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