1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28 #include <sys/types.h>
29 #include <sys/sunddi.h>
30 #include <sys/sunndi.h>
31 #include <sys/conf.h>
32 #include <sys/modctl.h>
33 #include <sys/stat.h>
34 #include <fpc.h>
35
36 static int fpc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
37 static int fpc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
38
39 static struct dev_ops fpc_ops = {
40 DEVO_REV,
41 0,
42 nulldev,
43 nulldev,
44 nulldev,
45 fpc_attach,
46 fpc_detach,
47 nodev,
48 NULL,
49 NULL,
50 nodev,
51 ddi_quiesce_not_needed, /* quiesce */
52 };
53
54 extern struct mod_ops mod_driverops;
55
56 static struct modldrv md = {
57 &mod_driverops,
58 "IO Chip Perf Counter",
59 &fpc_ops,
60 };
61
62 static struct modlinkage ml = {
63 MODREV_1,
64 (void *)&md,
65 NULL
66 };
67
68 int
_init(void)69 _init(void)
70 {
71 if (fpc_init_platform_check() != SUCCESS)
72 return (ENODEV);
73 return (mod_install(&ml));
74 }
75
76 int
_info(struct modinfo * modinfop)77 _info(struct modinfo *modinfop)
78 {
79 return (mod_info(&ml, modinfop));
80 }
81
82 int
_fini(void)83 _fini(void)
84 {
85 return (mod_remove(&ml));
86 }
87
88 static int
fpc_attach(dev_info_t * dip,ddi_attach_cmd_t cmd)89 fpc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
90 {
91 switch (cmd) {
92 /*
93 * Since the driver saves no state between calls, we can fully detach
94 * on suspend and fully attach on resume.
95 *
96 * An RFE might be to save event register states for restore.
97 * The result of not doing this is that the kstat reader (busstat)
98 * may quit upon resume, seeing that the events have changed out from
99 * underneath it (since the registers were powered off upon suspend).
100 */
101 case DDI_RESUME:
102 case DDI_ATTACH:
103 if (fpc_kstat_init(dip) != DDI_SUCCESS) {
104 (void) fpc_detach(dip, DDI_DETACH);
105 return (DDI_FAILURE);
106 }
107 return (DDI_SUCCESS);
108 default:
109 return (DDI_FAILURE);
110 }
111 }
112
113 static int
fpc_detach(dev_info_t * dip,ddi_detach_cmd_t cmd)114 fpc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
115 {
116 switch (cmd) {
117 case DDI_SUSPEND:
118 case DDI_DETACH:
119 fpc_kstat_fini(dip);
120 return (DDI_SUCCESS);
121 default:
122 return (DDI_FAILURE);
123 }
124 }
125