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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * The MDESC picl plugin serves 2 different functionalities. 29 * --The first is to look up certain CPU properties in the MDESC an to add 30 * these properties in the already created CPU PICL nodes in the /platform 31 * section of the tree. 32 * --The second functionality is to create a /disk_discovery section of the 33 * PICL tree which will have a disk node created for each disk node in the 34 * machine description. 35 */ 36 37 #include "mdescplugin.h" 38 #include <libnvpair.h> 39 40 #pragma init(mdescplugin_register) /* place in .init section */ 41 42 picl_nodehdl_t root_node; 43 md_t *mdp; 44 mde_cookie_t rootnode; 45 46 void mdescplugin_init(void); 47 void mdescplugin_fini(void); 48 static void signal_devtree(void); 49 50 extern int add_cpu_prop(picl_nodehdl_t node, void *args); 51 extern int disk_discovery(void); 52 extern md_t *mdesc_devinit(void); 53 extern void mdesc_devfini(md_t *mdp); 54 extern int update_devices(char *dev, int op); 55 56 picld_plugin_reg_t mdescplugin_reg = { 57 PICLD_PLUGIN_VERSION_1, 58 PICLD_PLUGIN_CRITICAL, 59 "mdesc_plugin", 60 mdescplugin_init, 61 mdescplugin_fini 62 }; 63 64 #define DISK_FOUND 0x00 65 #define DISK_NOT_FOUND 0x01 66 67 typedef struct disk_lookup { 68 char *path; 69 picl_nodehdl_t disk; 70 int result; 71 } disk_lookup_t; 72 73 int 74 find_disk(picl_nodehdl_t node, void *args) 75 { 76 disk_lookup_t *lookup = (disk_lookup_t *)args; 77 int status; 78 char path[PICL_PROPNAMELEN_MAX]; 79 80 status = ptree_get_propval_by_name(node, "Path", (void *)&path, 81 PICL_PROPNAMELEN_MAX); 82 if (status != PICL_SUCCESS) { 83 return (PICL_WALK_CONTINUE); 84 } 85 86 if (strcmp(path, lookup->path) == 0) { 87 lookup->disk = node; 88 lookup->result = DISK_FOUND; 89 return (PICL_WALK_TERMINATE); 90 } 91 92 return (PICL_WALK_CONTINUE); 93 } 94 95 /* 96 * DR event handler 97 * respond to the picl events: 98 * PICLEVENT_DR_AP_STATE_CHANGE 99 */ 100 static void 101 dr_handler(const char *ename, const void *earg, size_t size, void *cookie) 102 { 103 nvlist_t *nvlp = NULL; 104 char *dtype; 105 char *ap_id; 106 char *hint; 107 108 109 if (strcmp(ename, PICLEVENT_DR_AP_STATE_CHANGE) != 0) { 110 return; 111 } 112 113 if (nvlist_unpack((char *)earg, size, &nvlp, NULL)) { 114 return; 115 } 116 117 if (nvlist_lookup_string(nvlp, PICLEVENTARG_DATA_TYPE, &dtype)) { 118 nvlist_free(nvlp); 119 return; 120 } 121 122 if (strcmp(dtype, PICLEVENTARG_PICLEVENT_DATA) != 0) { 123 nvlist_free(nvlp); 124 return; 125 } 126 127 if (nvlist_lookup_string(nvlp, PICLEVENTARG_AP_ID, &ap_id)) { 128 nvlist_free(nvlp); 129 return; 130 } 131 132 if (nvlist_lookup_string(nvlp, PICLEVENTARG_HINT, &hint)) { 133 nvlist_free(nvlp); 134 return; 135 } 136 137 mdp = mdesc_devinit(); 138 if (mdp == NULL) { 139 nvlist_free(nvlp); 140 return; 141 } 142 143 rootnode = md_root_node(mdp); 144 145 if (strcmp(hint, DR_HINT_INSERT) == 0) 146 (void) update_devices(ap_id, DEV_ADD); 147 else if (strcmp(hint, DR_HINT_REMOVE) == 0) 148 (void) update_devices(ap_id, DEV_REMOVE); 149 150 mdesc_devfini(mdp); 151 nvlist_free(nvlp); 152 153 /* 154 * Signal the devtree plugin to add more cpu properties. 155 */ 156 signal_devtree(); 157 } 158 159 /* 160 * Discovery event handler 161 * respond to the picl events: 162 * PICLEVENT_SYSEVENT_DEVICE_ADDED 163 * PICLEVENT_SYSEVENT_DEVICE_REMOVED 164 */ 165 static void 166 dsc_handler(const char *ename, const void *earg, size_t size, void *cookie) 167 { 168 nvlist_t *nvlp = NULL; 169 char *path; 170 disk_lookup_t lookup; 171 int status; 172 173 /* 174 * retrieve the device's physical path from the event arg 175 * and determine which disk (if any) we are working with 176 */ 177 if (nvlist_unpack((char *)earg, size, &nvlp, NULL)) 178 return; 179 if (nvlist_lookup_string(nvlp, "devfs-path", &path)) 180 return; 181 182 lookup.path = strdup(path); 183 lookup.disk = NULL; 184 lookup.result = DISK_NOT_FOUND; 185 186 status = ptree_walk_tree_by_class(root_node, "disk", (void *)&lookup, 187 find_disk); 188 if (status != PICL_SUCCESS) { 189 return; 190 } 191 192 if (lookup.result == DISK_FOUND) { 193 if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_ADDED) == 0) 194 ptree_update_propval_by_name(lookup.disk, "State", 195 (void *)strdup(CONFIGURED), PICL_PROPNAMELEN_MAX); 196 else if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_REMOVED) == 0) 197 ptree_update_propval_by_name(lookup.disk, "State", 198 (void *)strdup(UNCONFIGURED), PICL_PROPNAMELEN_MAX); 199 } 200 201 nvlist_free(nvlp); 202 } 203 204 /*ARGSUSED*/ 205 static void 206 mdesc_ev_completion_handler(char *ename, void *earg, size_t size) 207 { 208 free(earg); 209 } 210 211 static void 212 signal_devtree(void) 213 { 214 nvlist_t *nvl; 215 char *packed_nvl; 216 size_t nvl_size; 217 int status; 218 219 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME_TYPE, NULL) != 0) 220 return; 221 222 /* 223 * Right now (Aug. 2007) snowbird is the only other platform 224 * which uses this event. Since that's a sun4u platform and 225 * this is sun4v we do not have to worry about possible confusion 226 * or interference between the two by grabbing this event for 227 * our own use here. This event is consumed by the devtree 228 * plug-in. The event signals the plug-in to re-run its 229 * cpu initialization function, which will cause it to add 230 * additional information to the cpu devtree nodes (particularly, 231 * the administrative state of the cpus.) 232 */ 233 if (nvlist_add_string(nvl, PICLEVENTARG_EVENT_NAME, 234 PICLEVENT_CPU_STATE_CHANGE) != 0) { 235 free(nvl); 236 return; 237 } 238 239 /* 240 * The devtree plug-in needs to see a devfs path argument for 241 * any event it considers. We supply one here which is essentially 242 * a dummy since it is not processed by the devtree plug-in for 243 * this event. 244 */ 245 if (nvlist_add_string(nvl, PICLEVENTARG_DEVFS_PATH, "/cpu") != 0) { 246 free(nvl); 247 return; 248 } 249 packed_nvl = NULL; 250 if (nvlist_pack(nvl, &packed_nvl, &nvl_size, NV_ENCODE_NATIVE, 251 0) != 0) { 252 free(nvl); 253 return; 254 } 255 if ((status = ptree_post_event(PICLEVENT_CPU_STATE_CHANGE, 256 packed_nvl, nvl_size, mdesc_ev_completion_handler)) != 257 PICL_SUCCESS) { 258 free(nvl); 259 syslog(LOG_WARNING, 260 "signal_devtree: can't post cpu event: %d\n", status); 261 } 262 } 263 264 void 265 mdescplugin_init(void) 266 { 267 int status; 268 269 status = ptree_get_root(&root_node); 270 if (status != PICL_SUCCESS) { 271 return; 272 } 273 274 mdp = mdesc_devinit(); 275 if (mdp == NULL) 276 return; 277 278 /* 279 * update the cpu configuration in case the snapshot cache used by the 280 * devtree plugin is out of date. 281 */ 282 (void) update_devices(OBP_CPU, DEV_ADD); 283 (void) update_devices(OBP_CPU, DEV_REMOVE); 284 285 rootnode = md_root_node(mdp); 286 287 /* 288 * This is the start of the CPU property augmentation code. 289 * add_cpu_prop and the rest of the CPU code lives in cpu_prop_update.c 290 */ 291 status = ptree_walk_tree_by_class(root_node, "cpu", NULL, add_cpu_prop); 292 if (status != PICL_SUCCESS) { 293 return; 294 } 295 296 signal_devtree(); 297 298 (void) disk_discovery(); 299 300 /* 301 * register dsc_handler for both "sysevent-device-added" and 302 * and for "sysevent-device-removed" PICL events 303 */ 304 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED, 305 dsc_handler, NULL); 306 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED, 307 dsc_handler, NULL); 308 (void) ptree_register_handler(PICLEVENT_DR_AP_STATE_CHANGE, 309 dr_handler, NULL); 310 311 mdesc_devfini(mdp); 312 } 313 314 void 315 mdescplugin_fini(void) 316 { 317 /* unregister the event handler */ 318 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED, 319 dsc_handler, NULL); 320 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED, 321 dsc_handler, NULL); 322 (void) ptree_unregister_handler(PICLEVENT_DR_AP_STATE_CHANGE, 323 dr_handler, NULL); 324 } 325 326 void 327 mdescplugin_register(void) 328 { 329 picld_plugin_register(&mdescplugin_reg); 330 } 331