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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * The MDESC picl plugin serves 2 different functionalities. 31 * --The first is to look up certain CPU properties in the MDESC an to add 32 * these properties in the already created CPU PICL nodes in the /platform 33 * section of the tree. 34 * --The second functionality is to create a /disk_discovery section of the 35 * PICL tree which will have a disk node created for each disk node in the 36 * machine description. 37 */ 38 39 #include "mdescplugin.h" 40 #include <libnvpair.h> 41 42 #pragma init(mdescplugin_register) /* place in .init section */ 43 44 picl_nodehdl_t root_node; 45 md_t *mdp; 46 mde_cookie_t rootnode; 47 48 void mdescplugin_init(void); 49 void mdescplugin_fini(void); 50 51 extern int add_cpu_prop(picl_nodehdl_t node, void *args); 52 extern int disk_discovery(void); 53 extern md_t *mdesc_devinit(void); 54 extern void mdesc_devfini(md_t *mdp); 55 extern int update_devices(char *dev, int op); 56 57 picld_plugin_reg_t mdescplugin_reg = { 58 PICLD_PLUGIN_VERSION_1, 59 PICLD_PLUGIN_CRITICAL, 60 "mdesc_plugin", 61 mdescplugin_init, 62 mdescplugin_fini 63 }; 64 65 #define DISK_FOUND 0x00 66 #define DISK_NOT_FOUND 0x01 67 68 typedef struct disk_lookup { 69 char *path; 70 picl_nodehdl_t disk; 71 int result; 72 } disk_lookup_t; 73 74 int 75 find_disk(picl_nodehdl_t node, void *args) 76 { 77 disk_lookup_t *lookup = (disk_lookup_t *)args; 78 int status; 79 char path[PICL_PROPNAMELEN_MAX]; 80 81 status = ptree_get_propval_by_name(node, "Path", (void *)&path, 82 PICL_PROPNAMELEN_MAX); 83 if (status != PICL_SUCCESS) { 84 return (PICL_WALK_CONTINUE); 85 } 86 87 if (strcmp(path, lookup->path) == 0) { 88 lookup->disk = node; 89 lookup->result = DISK_FOUND; 90 return (PICL_WALK_TERMINATE); 91 } 92 93 return (PICL_WALK_CONTINUE); 94 } 95 96 /* 97 * DR event handler 98 * respond to the picl events: 99 * PICLEVENT_DR_AP_STATE_CHANGE 100 */ 101 static void 102 dr_handler(const char *ename, const void *earg, size_t size, void *cookie) 103 { 104 nvlist_t *nvlp = NULL; 105 char *dtype; 106 char *ap_id; 107 char *hint; 108 109 110 if (strcmp(ename, PICLEVENT_DR_AP_STATE_CHANGE) != 0) { 111 return; 112 } 113 114 if (nvlist_unpack((char *)earg, size, &nvlp, NULL)) { 115 return; 116 } 117 118 if (nvlist_lookup_string(nvlp, PICLEVENTARG_DATA_TYPE, &dtype)) { 119 nvlist_free(nvlp); 120 return; 121 } 122 123 if (strcmp(dtype, PICLEVENTARG_PICLEVENT_DATA) != 0) { 124 nvlist_free(nvlp); 125 return; 126 } 127 128 if (nvlist_lookup_string(nvlp, PICLEVENTARG_AP_ID, &ap_id)) { 129 nvlist_free(nvlp); 130 return; 131 } 132 133 if (nvlist_lookup_string(nvlp, PICLEVENTARG_HINT, &hint)) { 134 nvlist_free(nvlp); 135 return; 136 } 137 138 mdp = mdesc_devinit(); 139 if (mdp == NULL) { 140 nvlist_free(nvlp); 141 return; 142 } 143 144 rootnode = md_root_node(mdp); 145 146 if (strcmp(hint, DR_HINT_INSERT) == 0) 147 (void) update_devices(ap_id, DEV_ADD); 148 else if (strcmp(hint, DR_HINT_REMOVE) == 0) 149 (void) update_devices(ap_id, DEV_REMOVE); 150 151 mdesc_devfini(mdp); 152 nvlist_free(nvlp); 153 } 154 155 /* 156 * Discovery event handler 157 * respond to the picl events: 158 * PICLEVENT_SYSEVENT_DEVICE_ADDED 159 * PICLEVENT_SYSEVENT_DEVICE_REMOVED 160 */ 161 static void 162 dsc_handler(const char *ename, const void *earg, size_t size, void *cookie) 163 { 164 nvlist_t *nvlp = NULL; 165 char *path; 166 disk_lookup_t lookup; 167 int status; 168 169 /* 170 * retrieve the device's physical path from the event arg 171 * and determine which disk (if any) we are working with 172 */ 173 if (nvlist_unpack((char *)earg, size, &nvlp, NULL)) 174 return; 175 if (nvlist_lookup_string(nvlp, "devfs-path", &path)) 176 return; 177 178 lookup.path = strdup(path); 179 lookup.disk = NULL; 180 lookup.result = DISK_NOT_FOUND; 181 182 status = ptree_walk_tree_by_class(root_node, "disk", (void *)&lookup, 183 find_disk); 184 if (status != PICL_SUCCESS) { 185 return; 186 } 187 188 if (lookup.result == DISK_FOUND) { 189 if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_ADDED) == 0) 190 ptree_update_propval_by_name(lookup.disk, "State", 191 (void *)strdup(CONFIGURED), PICL_PROPNAMELEN_MAX); 192 else if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_REMOVED) == 0) 193 ptree_update_propval_by_name(lookup.disk, "State", 194 (void *)strdup(UNCONFIGURED), PICL_PROPNAMELEN_MAX); 195 } 196 197 nvlist_free(nvlp); 198 } 199 200 /*ARGSUSED*/ 201 static void 202 mdesc_ev_completion_handler(char *ename, void *earg, size_t size) 203 { 204 free(earg); 205 } 206 207 static void 208 signal_devtree(void) 209 { 210 nvlist_t *nvl; 211 char *packed_nvl; 212 size_t nvl_size; 213 int status; 214 215 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME_TYPE, NULL) != 0) 216 return; 217 218 /* 219 * Right now (Aug. 2007) snowbird is the only other platform 220 * which uses this event. Since that's a sun4u platform and 221 * this is sun4v we do not have to worry about possible confusion 222 * or interference between the two by grabbing this event for 223 * our own use here. This event is consumed by the devtree 224 * plug-in. The event signals the plug-in to re-run its 225 * cpu initialization function, which will cause it to add 226 * additional information to the cpu devtree nodes (particularly, 227 * the administrative state of the cpus.) 228 */ 229 if (nvlist_add_string(nvl, PICLEVENTARG_EVENT_NAME, 230 PICLEVENT_CPU_STATE_CHANGE) != 0) { 231 free(nvl); 232 return; 233 } 234 235 /* 236 * The devtree plug-in needs to see a devfs path argument for 237 * any event it considers. We supply one here which is essentially 238 * a dummy since it is not processed by the devtree plug-in for 239 * this event. 240 */ 241 if (nvlist_add_string(nvl, PICLEVENTARG_DEVFS_PATH, "/cpu") != 0) { 242 free(nvl); 243 return; 244 } 245 packed_nvl = NULL; 246 if (nvlist_pack(nvl, &packed_nvl, &nvl_size, NV_ENCODE_NATIVE, 247 0) != 0) { 248 free(nvl); 249 return; 250 } 251 if ((status = ptree_post_event(PICLEVENT_CPU_STATE_CHANGE, 252 packed_nvl, nvl_size, mdesc_ev_completion_handler)) != 253 PICL_SUCCESS) { 254 free(nvl); 255 syslog(LOG_WARNING, 256 "signal_devtree: can't post cpu event: %d\n", status); 257 } 258 } 259 260 void 261 mdescplugin_init(void) 262 { 263 int status; 264 265 status = ptree_get_root(&root_node); 266 if (status != PICL_SUCCESS) { 267 return; 268 } 269 270 mdp = mdesc_devinit(); 271 if (mdp == NULL) 272 return; 273 274 /* 275 * update the cpu configuration in case the snapshot cache used by the 276 * devtree plugin is out of date. 277 */ 278 (void) update_devices(OBP_CPU, DEV_ADD); 279 (void) update_devices(OBP_CPU, DEV_REMOVE); 280 281 rootnode = md_root_node(mdp); 282 283 /* 284 * This is the start of the CPU property augmentation code. 285 * add_cpu_prop and the rest of the CPU code lives in cpu_prop_update.c 286 */ 287 status = ptree_walk_tree_by_class(root_node, "cpu", NULL, add_cpu_prop); 288 if (status != PICL_SUCCESS) { 289 return; 290 } 291 292 signal_devtree(); 293 294 (void) disk_discovery(); 295 296 /* 297 * register dsc_handler for both "sysevent-device-added" and 298 * and for "sysevent-device-removed" PICL events 299 */ 300 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED, 301 dsc_handler, NULL); 302 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED, 303 dsc_handler, NULL); 304 (void) ptree_register_handler(PICLEVENT_DR_AP_STATE_CHANGE, 305 dr_handler, NULL); 306 307 mdesc_devfini(mdp); 308 } 309 310 void 311 mdescplugin_fini(void) 312 { 313 /* unregister the event handler */ 314 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED, 315 dsc_handler, NULL); 316 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED, 317 dsc_handler, NULL); 318 (void) ptree_unregister_handler(PICLEVENT_DR_AP_STATE_CHANGE, 319 dr_handler, NULL); 320 } 321 322 void 323 mdescplugin_register(void) 324 { 325 picld_plugin_register(&mdescplugin_reg); 326 } 327