2 * Copyright (c) 2017-2019 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 15h and 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 F15H_SMN_ADDR_REG 0xb8
55 #define F15H_SMN_DATA_REG 0xbc
56 #define F17H_SMN_ADDR_REG 0x60
57 #define F17H_SMN_DATA_REG 0x64
59 #define PCI_DEVICE_ID_AMD_15H_M60H_ROOT 0x1576
60 #define PCI_DEVICE_ID_AMD_17H_ROOT 0x1450
61 #define PCI_DEVICE_ID_AMD_17H_M10H_ROOT 0x15d0
62 #define PCI_DEVICE_ID_AMD_17H_M30H_ROOT 0x1480 /* Also M70H. */
67 const struct pciid *smn_pciid;
70 static const struct pciid {
71 uint16_t amdsmn_vendorid;
72 uint16_t amdsmn_deviceid;
73 uint8_t amdsmn_addr_reg;
74 uint8_t amdsmn_data_reg;
77 .amdsmn_vendorid = CPU_VENDOR_AMD,
78 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_15H_M60H_ROOT,
79 .amdsmn_addr_reg = F15H_SMN_ADDR_REG,
80 .amdsmn_data_reg = F15H_SMN_DATA_REG,
83 .amdsmn_vendorid = CPU_VENDOR_AMD,
84 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_ROOT,
85 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
86 .amdsmn_data_reg = F17H_SMN_DATA_REG,
89 .amdsmn_vendorid = CPU_VENDOR_AMD,
90 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M10H_ROOT,
91 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
92 .amdsmn_data_reg = F17H_SMN_DATA_REG,
95 .amdsmn_vendorid = CPU_VENDOR_AMD,
96 .amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M30H_ROOT,
97 .amdsmn_addr_reg = F17H_SMN_ADDR_REG,
98 .amdsmn_data_reg = F17H_SMN_DATA_REG,
105 static void amdsmn_identify(driver_t *driver, device_t parent);
106 static int amdsmn_probe(device_t dev);
107 static int amdsmn_attach(device_t dev);
108 static int amdsmn_detach(device_t dev);
110 static device_method_t amdsmn_methods[] = {
111 /* Device interface */
112 DEVMETHOD(device_identify, amdsmn_identify),
113 DEVMETHOD(device_probe, amdsmn_probe),
114 DEVMETHOD(device_attach, amdsmn_attach),
115 DEVMETHOD(device_detach, amdsmn_detach),
119 static driver_t amdsmn_driver = {
122 sizeof(struct amdsmn_softc),
125 static devclass_t amdsmn_devclass;
126 DRIVER_MODULE(amdsmn, hostb, amdsmn_driver, amdsmn_devclass, NULL, NULL);
127 MODULE_VERSION(amdsmn, 1);
128 MODULE_PNP_INFO("U16:vendor;U16:device", pci, amdsmn, amdsmn_ids,
132 amdsmn_match(device_t parent, const struct pciid **pciid_out)
134 uint16_t vendor, device;
137 vendor = pci_get_vendor(parent);
138 device = pci_get_device(parent);
140 for (i = 0; i < nitems(amdsmn_ids); i++) {
141 if (vendor == amdsmn_ids[i].amdsmn_vendorid &&
142 device == amdsmn_ids[i].amdsmn_deviceid) {
143 if (pciid_out != NULL)
144 *pciid_out = &amdsmn_ids[i];
152 amdsmn_identify(driver_t *driver, device_t parent)
156 /* Make sure we're not being doubly invoked. */
157 if (device_find_child(parent, "amdsmn", -1) != NULL)
159 if (!amdsmn_match(parent, NULL))
162 child = device_add_child(parent, "amdsmn", -1);
164 device_printf(parent, "add amdsmn child failed\n");
168 amdsmn_probe(device_t dev)
173 if (resource_disabled("amdsmn", 0))
175 if (!amdsmn_match(device_get_parent(dev), NULL))
178 family = CPUID_TO_FAMILY(cpu_id);
187 snprintf(buf, sizeof(buf), "AMD Family %xh System Management Network",
189 device_set_desc_copy(dev, buf);
191 return (BUS_PROBE_GENERIC);
195 amdsmn_attach(device_t dev)
197 struct amdsmn_softc *sc = device_get_softc(dev);
199 if (!amdsmn_match(device_get_parent(dev), &sc->smn_pciid))
202 mtx_init(&sc->smn_lock, "SMN mtx", "SMN", MTX_DEF);
207 amdsmn_detach(device_t dev)
209 struct amdsmn_softc *sc = device_get_softc(dev);
211 mtx_destroy(&sc->smn_lock);
216 amdsmn_read(device_t dev, uint32_t addr, uint32_t *value)
218 struct amdsmn_softc *sc = device_get_softc(dev);
221 parent = device_get_parent(dev);
223 mtx_lock(&sc->smn_lock);
224 pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
225 *value = pci_read_config(parent, sc->smn_pciid->amdsmn_data_reg, 4);
226 mtx_unlock(&sc->smn_lock);
232 amdsmn_write(device_t dev, uint32_t addr, uint32_t value)
234 struct amdsmn_softc *sc = device_get_softc(dev);
237 parent = device_get_parent(dev);
239 mtx_lock(&sc->smn_lock);
240 pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
241 pci_write_config(parent, sc->smn_pciid->amdsmn_data_reg, value, 4);
242 mtx_unlock(&sc->smn_lock);