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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/include/acpi.h>
40
41 #include <dev/acpica/acpivar.h>
42
43 /* Hooks for the ACPI CA debugging infrastructure */
44 #define _COMPONENT      ACPI_BUTTON
45 ACPI_MODULE_NAME("IPMI")
46
47 #ifdef LOCAL_MODULE
48 #include <ipmi.h>
49 #include <ipmivars.h>
50 #else
51 #include <sys/ipmi.h>
52 #include <dev/ipmi/ipmivars.h>
53 #endif
54
55 static int ipmi_acpi_probe(device_t);
56 static int ipmi_acpi_attach(device_t);
57
58 int
59 ipmi_acpi_probe(device_t dev)
60 {
61         static char *ipmi_ids[] = {"IPI0001", NULL};
62
63         if (ipmi_attached)
64                 return (EBUSY);
65
66         if (acpi_disabled("ipmi") ||
67             ACPI_ID_PROBE(device_get_parent(dev), dev, ipmi_ids) == NULL)
68                 return (ENXIO);
69
70         device_set_desc(dev, "IPMI System Interface");
71
72         return (0);
73 }
74
75 static int
76 ipmi_acpi_attach(device_t dev)
77 {
78         ACPI_HANDLE devh;
79         const char *mode;
80         struct ipmi_get_info info;
81         struct ipmi_softc *sc = device_get_softc(dev);
82         int count, error, flags, i, type;
83         int interface_type = 0, interface_version = 0;
84
85         error = 0;
86         devh = acpi_get_handle(dev);
87         if (ACPI_FAILURE(acpi_GetInteger(devh, "_IFT", &interface_type)))
88                 return (ENXIO);
89
90         if (ACPI_FAILURE(acpi_GetInteger(devh, "_SRV", &interface_version)))
91                 return (ENXIO);
92
93         switch (interface_type) {
94         case KCS_MODE:
95                 count = 2;
96                 mode = "KCS";
97                 break;
98         case SMIC_MODE:
99                 count = 3;
100                 mode = "SMIC";
101                 break;
102         case BT_MODE:
103                 device_printf(dev, "BT interface not supported\n");
104                 return (ENXIO);
105         case SSIF_MODE:
106                 if (ACPI_FAILURE(acpi_GetInteger(devh, "_ADR", &flags)))
107                         return (ENXIO);
108                 info.address = flags;
109                 device_printf(dev, "SSIF interface not supported on ACPI\n");
110                 return (0);
111         default:
112                 return (ENXIO);
113         }
114
115         if (bus_get_resource(dev, SYS_RES_IOPORT, 0, NULL, NULL) == 0)
116                 type = SYS_RES_IOPORT;
117         else if (bus_get_resource(dev, SYS_RES_MEMORY, 0, NULL, NULL) == 0)
118                 type = SYS_RES_MEMORY;
119         else {
120                 device_printf(dev, "unknown resource type\n");
121                 return (ENXIO);
122         }
123
124         sc->ipmi_io_rid = 0;
125         sc->ipmi_io_res[0] = bus_alloc_resource_any(dev, type,
126             &sc->ipmi_io_rid, RF_ACTIVE);
127         sc->ipmi_io_type = type;
128         sc->ipmi_io_spacing = 1;
129         if (sc->ipmi_io_res[0] == NULL) {
130                 device_printf(dev, "couldn't configure I/O resource\n");
131                 return (ENXIO);
132         }
133
134         /* If we have multiple resources, allocate up to MAX_RES. */
135         for (i = 1; i < MAX_RES; i++) {
136                 sc->ipmi_io_rid = i;
137                 sc->ipmi_io_res[i] = bus_alloc_resource_any(dev, type,
138                     &sc->ipmi_io_rid, RF_ACTIVE);
139                 if (sc->ipmi_io_res[i] == NULL)
140                         break;
141         }
142         sc->ipmi_io_rid = 0;
143
144         /* If we have multiple resources, make sure we have enough of them. */
145         if (sc->ipmi_io_res[1] != NULL && sc->ipmi_io_res[count - 1] == NULL) {
146                 device_printf(dev, "too few I/O resources\n");
147                 error = ENXIO;
148                 goto bad;
149         }
150
151         device_printf(dev, "%s mode found at %s 0x%jx on %s\n",
152             mode, type == SYS_RES_IOPORT ? "io" : "mem",
153             (uintmax_t)rman_get_start(sc->ipmi_io_res[0]),
154             device_get_name(device_get_parent(dev)));
155
156         sc->ipmi_dev = dev;
157
158         /*
159          * Setup an interrupt if we have an interrupt resource.  We
160          * don't support GPE interrupts via _GPE yet.
161          */
162         sc->ipmi_irq_rid = 0;
163         sc->ipmi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
164             &sc->ipmi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
165
166         /* Warn if _GPE exists. */
167         if (ACPI_SUCCESS(AcpiEvaluateObject(devh, "_GPE", NULL, NULL)))
168                 device_printf(dev, "_GPE support not implemented\n");
169
170         /*
171          * We assume an alignment of 1 byte as currently the IPMI spec
172          * doesn't provide any way to determine the alignment via ACPI.
173          */
174         switch (interface_type) {
175         case KCS_MODE:
176                 error = ipmi_kcs_attach(sc);
177                 if (error)
178                         goto bad;
179                 break;
180         case SMIC_MODE:
181                 error = ipmi_smic_attach(sc);
182                 if (error)
183                         goto bad;
184                 break;
185         }
186         error = ipmi_attach(dev);
187         if (error)
188                 goto bad;
189
190         return (0);
191 bad:
192         ipmi_release_resources(dev);
193         return (error);
194 }
195
196 static device_method_t ipmi_methods[] = {
197         /* Device interface */
198         DEVMETHOD(device_probe,         ipmi_acpi_probe),
199         DEVMETHOD(device_attach,        ipmi_acpi_attach),
200         DEVMETHOD(device_detach,        ipmi_detach),
201         { 0, 0 }
202 };
203
204 static driver_t ipmi_acpi_driver = {
205         "ipmi",
206         ipmi_methods,
207         sizeof(struct ipmi_softc),
208 };
209
210 DRIVER_MODULE(ipmi_acpi, acpi, ipmi_acpi_driver, ipmi_devclass, 0, 0);
211 MODULE_DEPEND(ipmi_acpi, acpi, 1, 1, 1);