xref: /freebsd/sys/dev/ipmi/ipmi_acpi.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
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.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/condvar.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/rman.h>
37 #include <sys/selinfo.h>
38 
39 #include <contrib/dev/acpica/acpi.h>
40 #include <dev/acpica/acpivar.h>
41 
42 /* Hooks for the ACPI CA debugging infrastructure */
43 #define _COMPONENT	ACPI_BUTTON
44 ACPI_MODULE_NAME("IPMI")
45 
46 #ifdef LOCAL_MODULE
47 #include <ipmi.h>
48 #include <ipmivars.h>
49 #else
50 #include <sys/ipmi.h>
51 #include <dev/ipmi/ipmivars.h>
52 #endif
53 
54 static int ipmi_acpi_probe(device_t);
55 static int ipmi_acpi_attach(device_t);
56 
57 int
58 ipmi_acpi_probe(device_t dev)
59 {
60 	static char *ipmi_ids[] = {"IPI0001", NULL};
61 
62 	if (ipmi_attached)
63 		return (EBUSY);
64 
65 	if (acpi_disabled("ipmi") ||
66 	    ACPI_ID_PROBE(device_get_parent(dev), dev, ipmi_ids) == NULL)
67 		return (ENXIO);
68 
69 	device_set_desc(dev, "IPMI System Interface");
70 
71 	return (0);
72 }
73 
74 static int
75 ipmi_acpi_attach(device_t dev)
76 {
77 	ACPI_HANDLE devh;
78 	const char *mode;
79 	struct ipmi_get_info info;
80 	struct ipmi_softc *sc = device_get_softc(dev);
81 	int count, error, flags, i, type;
82 	int interface_type = 0, interface_version = 0;
83 
84 	error = 0;
85 	devh = acpi_get_handle(dev);
86 	if (ACPI_FAILURE(acpi_GetInteger(devh, "_IFT", &interface_type)))
87 		return (ENXIO);
88 
89 	if (ACPI_FAILURE(acpi_GetInteger(devh, "_SRV", &interface_version)))
90 		return (ENXIO);
91 
92 	switch (interface_type) {
93 	case KCS_MODE:
94 		count = 2;
95 		mode = "KCS";
96 		break;
97 	case SMIC_MODE:
98 		count = 3;
99 		mode = "SMIC";
100 		break;
101 	case BT_MODE:
102 		device_printf(dev, "BT interface not supported\n");
103 		return (ENXIO);
104 	case SSIF_MODE:
105 		if (ACPI_FAILURE(acpi_GetInteger(devh, "_ADR", &flags)))
106 			return (ENXIO);
107 		info.address = flags >> 1;
108 		device_printf(dev, "SSIF interface not supported on ACPI\n");
109 		return (0);
110 	default:
111 		return (ENXIO);
112 	}
113 
114 	if (bus_get_resource(dev, SYS_RES_IOPORT, 0, NULL, NULL) == 0)
115 		type = SYS_RES_IOPORT;
116 	else if (bus_get_resource(dev, SYS_RES_MEMORY, 0, NULL, NULL) == 0)
117 		type = SYS_RES_MEMORY;
118 	else {
119 		device_printf(dev, "unknown resource type\n");
120 		return (ENXIO);
121 	}
122 
123 	sc->ipmi_io_rid = 0;
124 	sc->ipmi_io_res[0] = bus_alloc_resource_any(dev, type,
125 	    &sc->ipmi_io_rid, RF_ACTIVE);
126 	sc->ipmi_io_type = type;
127 	sc->ipmi_io_spacing = 1;
128 	if (sc->ipmi_io_res[0] == NULL) {
129 		device_printf(dev, "couldn't configure I/O resource\n");
130 		return (ENXIO);
131 	}
132 
133 	/* If we have multiple resources, allocate up to MAX_RES. */
134 	for (i = 1; i < MAX_RES; i++) {
135 		sc->ipmi_io_rid = i;
136 		sc->ipmi_io_res[i] = bus_alloc_resource_any(dev, type,
137 		    &sc->ipmi_io_rid, RF_ACTIVE);
138 		if (sc->ipmi_io_res[i] == NULL)
139 			break;
140 	}
141 	sc->ipmi_io_rid = 0;
142 
143 	/* If we have multiple resources, make sure we have enough of them. */
144 	if (sc->ipmi_io_res[1] != NULL && sc->ipmi_io_res[count - 1] == NULL) {
145 		device_printf(dev, "too few I/O resources\n");
146 		error = ENXIO;
147 		goto bad;
148 	}
149 
150 	device_printf(dev, "%s mode found at %s 0x%jx on %s\n",
151 	    mode, type == SYS_RES_IOPORT ? "io" : "mem",
152 	    (uintmax_t)rman_get_start(sc->ipmi_io_res[0]),
153 	    device_get_name(device_get_parent(dev)));
154 
155 	sc->ipmi_dev = dev;
156 
157 	/*
158 	 * Setup an interrupt if we have an interrupt resource.  We
159 	 * don't support GPE interrupts via _GPE yet.
160 	 */
161 	sc->ipmi_irq_rid = 0;
162 	sc->ipmi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
163 	    &sc->ipmi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
164 
165 	/* Warn if _GPE exists. */
166 	if (ACPI_SUCCESS(AcpiEvaluateObject(devh, "_GPE", NULL, NULL)))
167 		device_printf(dev, "_GPE support not implemented\n");
168 
169 	/*
170 	 * We assume an alignment of 1 byte as currently the IPMI spec
171 	 * doesn't provide any way to determine the alignment via ACPI.
172 	 */
173 	switch (interface_type) {
174 	case KCS_MODE:
175 		error = ipmi_kcs_attach(sc);
176 		if (error)
177 			goto bad;
178 		break;
179 	case SMIC_MODE:
180 		error = ipmi_smic_attach(sc);
181 		if (error)
182 			goto bad;
183 		break;
184 	}
185 	error = ipmi_attach(dev);
186 	if (error)
187 		goto bad;
188 
189 	return (0);
190 bad:
191 	ipmi_release_resources(dev);
192 	return (error);
193 }
194 
195 static device_method_t ipmi_methods[] = {
196 	/* Device interface */
197 	DEVMETHOD(device_probe,		ipmi_acpi_probe),
198 	DEVMETHOD(device_attach,	ipmi_acpi_attach),
199 	DEVMETHOD(device_detach,	ipmi_detach),
200 	{ 0, 0 }
201 };
202 
203 static driver_t ipmi_acpi_driver = {
204 	"ipmi",
205 	ipmi_methods,
206 	sizeof(struct ipmi_softc),
207 };
208 
209 DRIVER_MODULE(ipmi_acpi, acpi, ipmi_acpi_driver, ipmi_devclass, 0, 0);
210 MODULE_DEPEND(ipmi_acpi, acpi, 1, 1, 1);
211