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
36static int fpc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
37static int fpc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
38
39static 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
54extern struct mod_ops mod_driverops;
55
56static struct modldrv md = {
57	&mod_driverops,
58	"IO Chip Perf Counter",
59	&fpc_ops,
60};
61
62static struct modlinkage ml = {
63	MODREV_1,
64	(void *)&md,
65	NULL
66};
67
68int
69_init(void)
70{
71	if (fpc_init_platform_check() != SUCCESS)
72		return (ENODEV);
73	return (mod_install(&ml));
74}
75
76int
77_info(struct modinfo *modinfop)
78{
79	return (mod_info(&ml, modinfop));
80}
81
82int
83_fini(void)
84{
85	return (mod_remove(&ml));
86}
87
88static int
89fpc_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
113static int
114fpc_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