2 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
28 * Driver for the AMD Family 17h CPU System Management Network.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/mutex.h>
41 #include <sys/sysctl.h>
42 #include <sys/systm.h>
44 #include <machine/cpufunc.h>
45 #include <machine/cputypes.h>
46 #include <machine/md_var.h>
47 #include <machine/specialreg.h>
49 #include <dev/pci/pcivar.h>
50 #include <x86/pci_cfgreg.h>
52 #include <dev/amdsmn/amdsmn.h>
54 #define SMN_ADDR_REG 0x60
55 #define SMN_DATA_REG 0x64
57 #define PCI_DEVICE_ID_AMD_17H_ROOT 0x1450
58 #define PCI_DEVICE_ID_AMD_17H_ROOT_DF_F3 0x1463
59 #define PCI_DEVICE_ID_AMD_17H_M10H_ROOT 0x15d0
60 #define PCI_DEVICE_ID_AMD_17H_M10H_ROOT_DF_F3 0x15eb
67 uint16_t amdsmn_vendorid;
68 uint16_t amdsmn_deviceid;
70 { CPU_VENDOR_AMD, PCI_DEVICE_ID_AMD_17H_ROOT },
71 { CPU_VENDOR_AMD, PCI_DEVICE_ID_AMD_17H_M10H_ROOT },
77 static void amdsmn_identify(driver_t *driver, device_t parent);
78 static int amdsmn_probe(device_t dev);
79 static int amdsmn_attach(device_t dev);
80 static int amdsmn_detach(device_t dev);
82 static device_method_t amdsmn_methods[] = {
83 /* Device interface */
84 DEVMETHOD(device_identify, amdsmn_identify),
85 DEVMETHOD(device_probe, amdsmn_probe),
86 DEVMETHOD(device_attach, amdsmn_attach),
87 DEVMETHOD(device_detach, amdsmn_detach),
91 static driver_t amdsmn_driver = {
94 sizeof(struct amdsmn_softc),
97 static devclass_t amdsmn_devclass;
98 DRIVER_MODULE(amdsmn, hostb, amdsmn_driver, amdsmn_devclass, NULL, NULL);
99 MODULE_VERSION(amdsmn, 1);
100 MODULE_PNP_INFO("U16:vendor;U16:device", pci, amdsmn, amdsmn_ids,
104 amdsmn_match(device_t parent)
106 uint16_t vendor, device;
109 vendor = pci_get_vendor(parent);
110 device = pci_get_device(parent);
112 for (i = 0; i < nitems(amdsmn_ids); i++)
113 if (vendor == amdsmn_ids[i].amdsmn_vendorid &&
114 device == amdsmn_ids[i].amdsmn_deviceid)
120 amdsmn_identify(driver_t *driver, device_t parent)
124 /* Make sure we're not being doubly invoked. */
125 if (device_find_child(parent, "amdsmn", -1) != NULL)
127 if (!amdsmn_match(parent))
130 child = device_add_child(parent, "amdsmn", -1);
132 device_printf(parent, "add amdsmn child failed\n");
136 amdsmn_probe(device_t dev)
140 if (resource_disabled("amdsmn", 0))
142 if (!amdsmn_match(device_get_parent(dev)))
145 family = CPUID_TO_FAMILY(cpu_id);
153 device_set_desc(dev, "AMD Family 17h System Management Network");
155 return (BUS_PROBE_GENERIC);
159 amdsmn_attach(device_t dev)
161 struct amdsmn_softc *sc = device_get_softc(dev);
163 mtx_init(&sc->smn_lock, "SMN mtx", "SMN", MTX_DEF);
168 amdsmn_detach(device_t dev)
170 struct amdsmn_softc *sc = device_get_softc(dev);
172 mtx_destroy(&sc->smn_lock);
177 amdsmn_read(device_t dev, uint32_t addr, uint32_t *value)
179 struct amdsmn_softc *sc = device_get_softc(dev);
182 parent = device_get_parent(dev);
184 mtx_lock(&sc->smn_lock);
185 pci_write_config(parent, SMN_ADDR_REG, addr, 4);
186 *value = pci_read_config(parent, SMN_DATA_REG, 4);
187 mtx_unlock(&sc->smn_lock);
193 amdsmn_write(device_t dev, uint32_t addr, uint32_t value)
195 struct amdsmn_softc *sc = device_get_softc(dev);
198 parent = device_get_parent(dev);
200 mtx_lock(&sc->smn_lock);
201 pci_write_config(parent, SMN_ADDR_REG, addr, 4);
202 pci_write_config(parent, SMN_DATA_REG, value, 4);
203 mtx_unlock(&sc->smn_lock);