xref: /freebsd/sys/dev/amdsmn/amdsmn.c (revision a9a71513ccfcb38346c84b006b43d45511d1652c)
1907f50feSConrad Meyer /*-
25b505170SConrad Meyer  * Copyright (c) 2017-2020 Conrad Meyer <cem@FreeBSD.org>
3907f50feSConrad Meyer  * All rights reserved.
4907f50feSConrad Meyer  *
5907f50feSConrad Meyer  * Redistribution and use in source and binary forms, with or without
6907f50feSConrad Meyer  * modification, are permitted provided that the following conditions
7907f50feSConrad Meyer  * are met:
8907f50feSConrad Meyer  * 1. Redistributions of source code must retain the above copyright
9907f50feSConrad Meyer  *    notice, this list of conditions and the following disclaimer.
10907f50feSConrad Meyer  * 2. Redistributions in binary form must reproduce the above copyright
11907f50feSConrad Meyer  *    notice, this list of conditions and the following disclaimer in the
12907f50feSConrad Meyer  *    documentation and/or other materials provided with the distribution.
13907f50feSConrad Meyer  *
14907f50feSConrad Meyer  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15907f50feSConrad Meyer  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16907f50feSConrad Meyer  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17907f50feSConrad Meyer  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18907f50feSConrad Meyer  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19907f50feSConrad Meyer  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20907f50feSConrad Meyer  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21907f50feSConrad Meyer  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22907f50feSConrad Meyer  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23907f50feSConrad Meyer  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24907f50feSConrad Meyer  * POSSIBILITY OF SUCH DAMAGE.
25907f50feSConrad Meyer  */
26907f50feSConrad Meyer 
27907f50feSConrad Meyer /*
28e49ec461SConrad Meyer  * Driver for the AMD Family 15h and 17h CPU System Management Network.
29907f50feSConrad Meyer  */
30907f50feSConrad Meyer 
31907f50feSConrad Meyer #include <sys/param.h>
32907f50feSConrad Meyer #include <sys/bus.h>
33907f50feSConrad Meyer #include <sys/conf.h>
34907f50feSConrad Meyer #include <sys/lock.h>
35907f50feSConrad Meyer #include <sys/kernel.h>
36907f50feSConrad Meyer #include <sys/module.h>
37907f50feSConrad Meyer #include <sys/mutex.h>
38907f50feSConrad Meyer #include <sys/sysctl.h>
39907f50feSConrad Meyer #include <sys/systm.h>
40907f50feSConrad Meyer 
41907f50feSConrad Meyer #include <machine/cpufunc.h>
429d49c422SConrad Meyer #include <machine/cputypes.h>
43907f50feSConrad Meyer #include <machine/md_var.h>
44907f50feSConrad Meyer #include <machine/specialreg.h>
45907f50feSConrad Meyer 
46907f50feSConrad Meyer #include <dev/pci/pcivar.h>
47907f50feSConrad Meyer #include <x86/pci_cfgreg.h>
48907f50feSConrad Meyer 
49907f50feSConrad Meyer #include <dev/amdsmn/amdsmn.h>
50907f50feSConrad Meyer 
51e49ec461SConrad Meyer #define	F15H_SMN_ADDR_REG	0xb8
52e49ec461SConrad Meyer #define	F15H_SMN_DATA_REG	0xbc
53e49ec461SConrad Meyer #define	F17H_SMN_ADDR_REG	0x60
54e49ec461SConrad Meyer #define	F17H_SMN_DATA_REG	0x64
55907f50feSConrad Meyer 
56e49ec461SConrad Meyer #define	PCI_DEVICE_ID_AMD_15H_M60H_ROOT		0x1576
579d49c422SConrad Meyer #define	PCI_DEVICE_ID_AMD_17H_ROOT		0x1450
589d49c422SConrad Meyer #define	PCI_DEVICE_ID_AMD_17H_M10H_ROOT		0x15d0
59ea6189d3SConrad Meyer #define	PCI_DEVICE_ID_AMD_17H_M30H_ROOT		0x1480	/* Also M70H, F19H M00H/M20H */
607aa6eeb2SSimon Wells #define	PCI_DEVICE_ID_AMD_17H_M60H_ROOT		0x1630	/* Also F19H M50H */
6151c69c86SXin LI #define	PCI_DEVICE_ID_AMD_19H_M10H_ROOT		0x14a4
62a76e28d1SMatthias Lanter #define	PCI_DEVICE_ID_AMD_19H_M40H_ROOT		0x14b5
63*a9a71513SSimon Wells #define	PCI_DEVICE_ID_AMD_19H_M60H_ROOT		0x14d8	/* Also F1AH M40H */
64ef3f8aa0SOliver Fromme #define	PCI_DEVICE_ID_AMD_19H_M70H_ROOT		0x14e8
659d49c422SConrad Meyer 
66e49ec461SConrad Meyer struct pciid;
67907f50feSConrad Meyer struct amdsmn_softc {
68907f50feSConrad Meyer 	struct mtx smn_lock;
69e49ec461SConrad Meyer 	const struct pciid *smn_pciid;
70907f50feSConrad Meyer };
71907f50feSConrad Meyer 
72e49ec461SConrad Meyer static const struct pciid {
739d49c422SConrad Meyer 	uint16_t	amdsmn_vendorid;
749d49c422SConrad Meyer 	uint16_t	amdsmn_deviceid;
75e49ec461SConrad Meyer 	uint8_t		amdsmn_addr_reg;
76e49ec461SConrad Meyer 	uint8_t		amdsmn_data_reg;
77907f50feSConrad Meyer } amdsmn_ids[] = {
78e49ec461SConrad Meyer 	{
79e49ec461SConrad Meyer 		.amdsmn_vendorid = CPU_VENDOR_AMD,
80e49ec461SConrad Meyer 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_15H_M60H_ROOT,
81e49ec461SConrad Meyer 		.amdsmn_addr_reg = F15H_SMN_ADDR_REG,
82e49ec461SConrad Meyer 		.amdsmn_data_reg = F15H_SMN_DATA_REG,
83e49ec461SConrad Meyer 	},
84e49ec461SConrad Meyer 	{
85e49ec461SConrad Meyer 		.amdsmn_vendorid = CPU_VENDOR_AMD,
86e49ec461SConrad Meyer 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_ROOT,
87e49ec461SConrad Meyer 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
88e49ec461SConrad Meyer 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
89e49ec461SConrad Meyer 	},
90e49ec461SConrad Meyer 	{
91e49ec461SConrad Meyer 		.amdsmn_vendorid = CPU_VENDOR_AMD,
92e49ec461SConrad Meyer 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M10H_ROOT,
93e49ec461SConrad Meyer 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
94e49ec461SConrad Meyer 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
95e49ec461SConrad Meyer 	},
9685dbddbeSConrad Meyer 	{
9785dbddbeSConrad Meyer 		.amdsmn_vendorid = CPU_VENDOR_AMD,
9885dbddbeSConrad Meyer 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M30H_ROOT,
9985dbddbeSConrad Meyer 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
10085dbddbeSConrad Meyer 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
10185dbddbeSConrad Meyer 	},
1025b505170SConrad Meyer 	{
1035b505170SConrad Meyer 		.amdsmn_vendorid = CPU_VENDOR_AMD,
1045b505170SConrad Meyer 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_17H_M60H_ROOT,
1055b505170SConrad Meyer 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
1065b505170SConrad Meyer 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
1075b505170SConrad Meyer 	},
108323a94afSAkio Morita 	{
109323a94afSAkio Morita 		.amdsmn_vendorid = CPU_VENDOR_AMD,
11051c69c86SXin LI 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_19H_M10H_ROOT,
11151c69c86SXin LI 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
11251c69c86SXin LI 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
11351c69c86SXin LI 	},
11451c69c86SXin LI 	{
11551c69c86SXin LI 		.amdsmn_vendorid = CPU_VENDOR_AMD,
116a76e28d1SMatthias Lanter 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_19H_M40H_ROOT,
117a76e28d1SMatthias Lanter 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
118a76e28d1SMatthias Lanter 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
119a76e28d1SMatthias Lanter 	},
120a76e28d1SMatthias Lanter 	{
121a76e28d1SMatthias Lanter 		.amdsmn_vendorid = CPU_VENDOR_AMD,
122323a94afSAkio Morita 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_19H_M60H_ROOT,
123323a94afSAkio Morita 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
124323a94afSAkio Morita 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
125323a94afSAkio Morita 	},
126ef3f8aa0SOliver Fromme 	{
127ef3f8aa0SOliver Fromme 		.amdsmn_vendorid = CPU_VENDOR_AMD,
128ef3f8aa0SOliver Fromme 		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_19H_M70H_ROOT,
129ef3f8aa0SOliver Fromme 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
130ef3f8aa0SOliver Fromme 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
131ef3f8aa0SOliver Fromme 	},
132907f50feSConrad Meyer };
133907f50feSConrad Meyer 
134907f50feSConrad Meyer /*
135907f50feSConrad Meyer  * Device methods.
136907f50feSConrad Meyer  */
137907f50feSConrad Meyer static void 	amdsmn_identify(driver_t *driver, device_t parent);
138907f50feSConrad Meyer static int	amdsmn_probe(device_t dev);
139907f50feSConrad Meyer static int	amdsmn_attach(device_t dev);
140907f50feSConrad Meyer static int	amdsmn_detach(device_t dev);
141907f50feSConrad Meyer 
142907f50feSConrad Meyer static device_method_t amdsmn_methods[] = {
143907f50feSConrad Meyer 	/* Device interface */
144907f50feSConrad Meyer 	DEVMETHOD(device_identify,	amdsmn_identify),
145907f50feSConrad Meyer 	DEVMETHOD(device_probe,		amdsmn_probe),
146907f50feSConrad Meyer 	DEVMETHOD(device_attach,	amdsmn_attach),
147907f50feSConrad Meyer 	DEVMETHOD(device_detach,	amdsmn_detach),
148907f50feSConrad Meyer 	DEVMETHOD_END
149907f50feSConrad Meyer };
150907f50feSConrad Meyer 
151907f50feSConrad Meyer static driver_t amdsmn_driver = {
152907f50feSConrad Meyer 	"amdsmn",
153907f50feSConrad Meyer 	amdsmn_methods,
154907f50feSConrad Meyer 	sizeof(struct amdsmn_softc),
155907f50feSConrad Meyer };
156907f50feSConrad Meyer 
15783a273efSJohn Baldwin DRIVER_MODULE(amdsmn, hostb, amdsmn_driver, NULL, NULL);
158907f50feSConrad Meyer MODULE_VERSION(amdsmn, 1);
1599d49c422SConrad Meyer MODULE_PNP_INFO("U16:vendor;U16:device", pci, amdsmn, amdsmn_ids,
160329e817fSWarner Losh     nitems(amdsmn_ids));
161907f50feSConrad Meyer 
1621b93938aSConrad Meyer static bool
amdsmn_match(device_t parent,const struct pciid ** pciid_out)163e49ec461SConrad Meyer amdsmn_match(device_t parent, const struct pciid **pciid_out)
164907f50feSConrad Meyer {
1659d49c422SConrad Meyer 	uint16_t vendor, device;
166907f50feSConrad Meyer 	size_t i;
167907f50feSConrad Meyer 
1689d49c422SConrad Meyer 	vendor = pci_get_vendor(parent);
1699d49c422SConrad Meyer 	device = pci_get_device(parent);
1709d49c422SConrad Meyer 
171e49ec461SConrad Meyer 	for (i = 0; i < nitems(amdsmn_ids); i++) {
1729d49c422SConrad Meyer 		if (vendor == amdsmn_ids[i].amdsmn_vendorid &&
173e49ec461SConrad Meyer 		    device == amdsmn_ids[i].amdsmn_deviceid) {
174e49ec461SConrad Meyer 			if (pciid_out != NULL)
175e49ec461SConrad Meyer 				*pciid_out = &amdsmn_ids[i];
1761b93938aSConrad Meyer 			return (true);
177e49ec461SConrad Meyer 		}
178e49ec461SConrad Meyer 	}
1791b93938aSConrad Meyer 	return (false);
1801b93938aSConrad Meyer }
181907f50feSConrad Meyer 
1821b93938aSConrad Meyer static void
amdsmn_identify(driver_t * driver,device_t parent)1831b93938aSConrad Meyer amdsmn_identify(driver_t *driver, device_t parent)
1841b93938aSConrad Meyer {
1851b93938aSConrad Meyer 	device_t child;
1861b93938aSConrad Meyer 
1871b93938aSConrad Meyer 	/* Make sure we're not being doubly invoked. */
1881b93938aSConrad Meyer 	if (device_find_child(parent, "amdsmn", -1) != NULL)
1891b93938aSConrad Meyer 		return;
190e49ec461SConrad Meyer 	if (!amdsmn_match(parent, NULL))
191907f50feSConrad Meyer 		return;
192907f50feSConrad Meyer 
1935b56413dSWarner Losh 	child = device_add_child(parent, "amdsmn", DEVICE_UNIT_ANY);
194907f50feSConrad Meyer 	if (child == NULL)
195907f50feSConrad Meyer 		device_printf(parent, "add amdsmn child failed\n");
196907f50feSConrad Meyer }
197907f50feSConrad Meyer 
198907f50feSConrad Meyer static int
amdsmn_probe(device_t dev)199907f50feSConrad Meyer amdsmn_probe(device_t dev)
200907f50feSConrad Meyer {
201907f50feSConrad Meyer 	uint32_t family;
202907f50feSConrad Meyer 
203907f50feSConrad Meyer 	if (resource_disabled("amdsmn", 0))
204907f50feSConrad Meyer 		return (ENXIO);
205e49ec461SConrad Meyer 	if (!amdsmn_match(device_get_parent(dev), NULL))
2061b93938aSConrad Meyer 		return (ENXIO);
207907f50feSConrad Meyer 
208907f50feSConrad Meyer 	family = CPUID_TO_FAMILY(cpu_id);
209907f50feSConrad Meyer 
210907f50feSConrad Meyer 	switch (family) {
211e49ec461SConrad Meyer 	case 0x15:
212907f50feSConrad Meyer 	case 0x17:
213ea6189d3SConrad Meyer 	case 0x19:
214*a9a71513SSimon Wells 	case 0x1a:
215907f50feSConrad Meyer 		break;
216907f50feSConrad Meyer 	default:
217907f50feSConrad Meyer 		return (ENXIO);
218907f50feSConrad Meyer 	}
21948ef9cffSMark Johnston 	device_set_descf(dev, "AMD Family %xh System Management Network",
220e49ec461SConrad Meyer 	    family);
221907f50feSConrad Meyer 
222907f50feSConrad Meyer 	return (BUS_PROBE_GENERIC);
223907f50feSConrad Meyer }
224907f50feSConrad Meyer 
225907f50feSConrad Meyer static int
amdsmn_attach(device_t dev)226907f50feSConrad Meyer amdsmn_attach(device_t dev)
227907f50feSConrad Meyer {
228907f50feSConrad Meyer 	struct amdsmn_softc *sc = device_get_softc(dev);
229907f50feSConrad Meyer 
230e49ec461SConrad Meyer 	if (!amdsmn_match(device_get_parent(dev), &sc->smn_pciid))
231e49ec461SConrad Meyer 		return (ENXIO);
232e49ec461SConrad Meyer 
233907f50feSConrad Meyer 	mtx_init(&sc->smn_lock, "SMN mtx", "SMN", MTX_DEF);
234907f50feSConrad Meyer 	return (0);
235907f50feSConrad Meyer }
236907f50feSConrad Meyer 
237907f50feSConrad Meyer int
amdsmn_detach(device_t dev)238907f50feSConrad Meyer amdsmn_detach(device_t dev)
239907f50feSConrad Meyer {
240907f50feSConrad Meyer 	struct amdsmn_softc *sc = device_get_softc(dev);
241907f50feSConrad Meyer 
242907f50feSConrad Meyer 	mtx_destroy(&sc->smn_lock);
243907f50feSConrad Meyer 	return (0);
244907f50feSConrad Meyer }
245907f50feSConrad Meyer 
246907f50feSConrad Meyer int
amdsmn_read(device_t dev,uint32_t addr,uint32_t * value)247907f50feSConrad Meyer amdsmn_read(device_t dev, uint32_t addr, uint32_t *value)
248907f50feSConrad Meyer {
249907f50feSConrad Meyer 	struct amdsmn_softc *sc = device_get_softc(dev);
250907f50feSConrad Meyer 	device_t parent;
251907f50feSConrad Meyer 
252907f50feSConrad Meyer 	parent = device_get_parent(dev);
253907f50feSConrad Meyer 
254907f50feSConrad Meyer 	mtx_lock(&sc->smn_lock);
255e49ec461SConrad Meyer 	pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
256e49ec461SConrad Meyer 	*value = pci_read_config(parent, sc->smn_pciid->amdsmn_data_reg, 4);
257907f50feSConrad Meyer 	mtx_unlock(&sc->smn_lock);
258907f50feSConrad Meyer 
259907f50feSConrad Meyer 	return (0);
260907f50feSConrad Meyer }
261907f50feSConrad Meyer 
262907f50feSConrad Meyer int
amdsmn_write(device_t dev,uint32_t addr,uint32_t value)263907f50feSConrad Meyer amdsmn_write(device_t dev, uint32_t addr, uint32_t value)
264907f50feSConrad Meyer {
265907f50feSConrad Meyer 	struct amdsmn_softc *sc = device_get_softc(dev);
266907f50feSConrad Meyer 	device_t parent;
267907f50feSConrad Meyer 
268907f50feSConrad Meyer 	parent = device_get_parent(dev);
269907f50feSConrad Meyer 
270907f50feSConrad Meyer 	mtx_lock(&sc->smn_lock);
271e49ec461SConrad Meyer 	pci_write_config(parent, sc->smn_pciid->amdsmn_addr_reg, addr, 4);
272e49ec461SConrad Meyer 	pci_write_config(parent, sc->smn_pciid->amdsmn_data_reg, value, 4);
273907f50feSConrad Meyer 	mtx_unlock(&sc->smn_lock);
274907f50feSConrad Meyer 
275907f50feSConrad Meyer 	return (0);
276907f50feSConrad Meyer }
277