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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/sunddi.h> 31 #include <sys/sunndi.h> 32 #include <sys/conf.h> 33 #include <sys/modctl.h> 34 #include <sys/stat.h> 35 #include <fpc.h> 36 37 static int fpc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); 38 static int fpc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); 39 40 static struct dev_ops fpc_ops = { 41 DEVO_REV, 42 0, 43 nulldev, 44 nulldev, 45 nulldev, 46 fpc_attach, 47 fpc_detach, 48 nodev, 49 NULL, 50 NULL, 51 nodev 52 }; 53 54 extern struct mod_ops mod_driverops; 55 56 static struct modldrv md = { 57 &mod_driverops, 58 "IO Chip Perf Counter %I%", 59 &fpc_ops, 60 }; 61 62 static struct modlinkage ml = { 63 MODREV_1, 64 (void *)&md, 65 NULL 66 }; 67 68 int 69 _init(void) 70 { 71 return (mod_install(&ml)); 72 } 73 74 int 75 _info(struct modinfo *modinfop) 76 { 77 return (mod_info(&ml, modinfop)); 78 } 79 80 int 81 _fini(void) 82 { 83 return (mod_remove(&ml)); 84 } 85 86 static int 87 fpc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 88 { 89 switch (cmd) { 90 /* 91 * Since the driver saves no state between calls, we can fully detach 92 * on suspend and fully attach on resume. 93 * 94 * An RFE might be to save event register states for restore. 95 * The result of not doing this is that the kstat reader (busstat) 96 * may quit upon resume, seeing that the events have changed out from 97 * underneath it (since the registers were powered off upon suspend). 98 */ 99 case DDI_RESUME: 100 case DDI_ATTACH: 101 if (fpc_kstat_init(dip) != DDI_SUCCESS) { 102 (void) fpc_detach(dip, DDI_DETACH); 103 return (DDI_FAILURE); 104 } 105 return (DDI_SUCCESS); 106 default: 107 return (DDI_FAILURE); 108 } 109 } 110 111 static int 112 fpc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 113 { 114 switch (cmd) { 115 case DDI_SUSPEND: 116 case DDI_DETACH: 117 fpc_kstat_fini(dip); 118 return (DDI_SUCCESS); 119 default: 120 return (DDI_FAILURE); 121 } 122 } 123