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Add smn(4) driver for AMD System Management Network

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AMD Family 17h CPUs have an internal network used to communicate between
the host CPU and the PSP and SMU coprocessors.  It exposes a simple
32-bit register space.

Reviewed by:	avg (no +1), mjoras, truckman
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D12217
This commit is contained in:
Conrad Meyer 2017-09-05 15:13:41 +00:00
parent b0618cda03
commit 907f50fe04
10 changed files with 302 additions and 0 deletions
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2
share/man/man4/Makefile
View File

@ -46,6 +46,7 @@ MAN= aac.4 \
amdpm.4 \
${_amdsbwd.4} \
${_amdsmb.4} \
${_amdsmn.4} \
${_amdtemp.4} \
${_bxe.4} \
amr.4 \
@ -769,6 +770,7 @@ _attimer.4= attimer.4
_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

64
share/man/man4/amdsmn.4 Normal file
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@ -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

5
sys/amd64/conf/NOTES
View File

@ -588,6 +588,11 @@ device cpuctl
#
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

1
sys/boot/forth/loader.conf
View File

@ -525,6 +525,7 @@ coretemp_load="NO" # Intel Core CPU temperature monitor
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

1
sys/conf/files.amd64
View File

@ -198,6 +198,7 @@ dev/agp/agp_amd64.c optional agp
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

1
sys/conf/files.i386
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@ -152,6 +152,7 @@ dev/agp/agp_sis.c optional agp
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

186
sys/dev/amdsmn/amdsmn.c Normal file
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@ -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);
}

32
sys/dev/amdsmn/amdsmn.h Normal file
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@ -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);

2
sys/modules/Makefile
View File

@ -35,6 +35,7 @@ SUBDIR= \
alq \
${_amd_ecc_inject} \
${_amdsbwd} \
${_amdsmn} \
${_amdtemp} \
amr \
${_an} \
@ -626,6 +627,7 @@ _aesni= aesni
.endif
_amd_ecc_inject=amd_ecc_inject
_amdsbwd= amdsbwd
_amdsmn= amdsmn
_amdtemp= amdtemp
_arcmsr= arcmsr
_asmc= asmc

8
sys/modules/amdsmn/Makefile Normal file
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@ -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>