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 if (fpc_init_platform_check() != SUCCESS) 72 return (ENODEV); 73 return (mod_install(&ml)); 74 } 75 76 int 77 _info(struct modinfo *modinfop) 78 { 79 return (mod_info(&ml, modinfop)); 80 } 81 82 int 83 _fini(void) 84 { 85 return (mod_remove(&ml)); 86 } 87 88 static int 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 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