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 * Copyright 2019 Peter Tribble.
27 */
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 static void signal_devtree(void);
51
52 extern int add_cpu_prop(picl_nodehdl_t node, void *args);
53 extern int disk_discovery(void);
54 extern md_t *mdesc_devinit(void);
55 extern void mdesc_devfini(md_t *mdp);
56 extern int update_devices(char *dev, int op);
57
58 picld_plugin_reg_t mdescplugin_reg = {
59 PICLD_PLUGIN_VERSION_1,
60 PICLD_PLUGIN_CRITICAL,
61 "mdesc_plugin",
62 mdescplugin_init,
63 mdescplugin_fini
64 };
65
66 #define DISK_FOUND 0x00
67 #define DISK_NOT_FOUND 0x01
68
69 typedef struct disk_lookup {
70 char *path;
71 picl_nodehdl_t disk;
72 int result;
73 } disk_lookup_t;
74
75 int
find_disk(picl_nodehdl_t node,void * args)76 find_disk(picl_nodehdl_t node, void *args)
77 {
78 disk_lookup_t *lookup = (disk_lookup_t *)args;
79 int status;
80 char path[PICL_PROPNAMELEN_MAX];
81
82 status = ptree_get_propval_by_name(node, "Path", (void *)&path,
83 PICL_PROPNAMELEN_MAX);
84 if (status != PICL_SUCCESS) {
85 return (PICL_WALK_CONTINUE);
86 }
87
88 if (strcmp(path, lookup->path) == 0) {
89 lookup->disk = node;
90 lookup->result = DISK_FOUND;
91 return (PICL_WALK_TERMINATE);
92 }
93
94 return (PICL_WALK_CONTINUE);
95 }
96
97 /*
98 * DR event handler
99 * respond to the picl events:
100 * PICLEVENT_DR_AP_STATE_CHANGE
101 */
102 static void
dr_handler(const char * ename,const void * earg,size_t size,void * cookie)103 dr_handler(const char *ename, const void *earg, size_t size, void *cookie)
104 {
105 nvlist_t *nvlp = NULL;
106 char *dtype;
107 char *ap_id;
108 char *hint;
109
110
111 if (strcmp(ename, PICLEVENT_DR_AP_STATE_CHANGE) != 0) {
112 return;
113 }
114
115 if (nvlist_unpack((char *)earg, size, &nvlp, 0)) {
116 return;
117 }
118
119 if (nvlist_lookup_string(nvlp, PICLEVENTARG_DATA_TYPE, &dtype)) {
120 nvlist_free(nvlp);
121 return;
122 }
123
124 if (strcmp(dtype, PICLEVENTARG_PICLEVENT_DATA) != 0) {
125 nvlist_free(nvlp);
126 return;
127 }
128
129 if (nvlist_lookup_string(nvlp, PICLEVENTARG_AP_ID, &ap_id)) {
130 nvlist_free(nvlp);
131 return;
132 }
133
134 if (nvlist_lookup_string(nvlp, PICLEVENTARG_HINT, &hint)) {
135 nvlist_free(nvlp);
136 return;
137 }
138
139 mdp = mdesc_devinit();
140 if (mdp == NULL) {
141 nvlist_free(nvlp);
142 return;
143 }
144
145 rootnode = md_root_node(mdp);
146
147 if (strcmp(hint, DR_HINT_INSERT) == 0)
148 (void) update_devices(ap_id, DEV_ADD);
149 else if (strcmp(hint, DR_HINT_REMOVE) == 0)
150 (void) update_devices(ap_id, DEV_REMOVE);
151
152 mdesc_devfini(mdp);
153 nvlist_free(nvlp);
154
155 /*
156 * Signal the devtree plugin to add more cpu properties.
157 */
158 signal_devtree();
159 }
160
161 /*
162 * Discovery event handler
163 * respond to the picl events:
164 * PICLEVENT_SYSEVENT_DEVICE_ADDED
165 * PICLEVENT_SYSEVENT_DEVICE_REMOVED
166 */
167 static void
dsc_handler(const char * ename,const void * earg,size_t size,void * cookie)168 dsc_handler(const char *ename, const void *earg, size_t size, void *cookie)
169 {
170 nvlist_t *nvlp = NULL;
171 char *path;
172 disk_lookup_t lookup;
173 int status;
174
175 /*
176 * retrieve the device's physical path from the event arg
177 * and determine which disk (if any) we are working with
178 */
179 if (nvlist_unpack((char *)earg, size, &nvlp, 0))
180 return;
181 if (nvlist_lookup_string(nvlp, "devfs-path", &path))
182 return;
183
184 lookup.path = strdup(path);
185 lookup.disk = 0;
186 lookup.result = DISK_NOT_FOUND;
187
188 status = ptree_walk_tree_by_class(root_node, "disk", (void *)&lookup,
189 find_disk);
190 if (status != PICL_SUCCESS) {
191 return;
192 }
193
194 if (lookup.result == DISK_FOUND) {
195 if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_ADDED) == 0)
196 ptree_update_propval_by_name(lookup.disk, "State",
197 (void *)strdup(CONFIGURED), PICL_PROPNAMELEN_MAX);
198 else if (strcmp(ename, PICLEVENT_SYSEVENT_DEVICE_REMOVED) == 0)
199 ptree_update_propval_by_name(lookup.disk, "State",
200 (void *)strdup(UNCONFIGURED), PICL_PROPNAMELEN_MAX);
201 }
202
203 nvlist_free(nvlp);
204 }
205
206 /*ARGSUSED*/
207 static void
mdesc_ev_completion_handler(char * ename,void * earg,size_t size)208 mdesc_ev_completion_handler(char *ename, void *earg, size_t size)
209 {
210 free(earg);
211 }
212
213 static void
signal_devtree(void)214 signal_devtree(void)
215 {
216 nvlist_t *nvl;
217 char *packed_nvl;
218 size_t nvl_size;
219 int status;
220
221 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME_TYPE, 0) != 0)
222 return;
223
224 /*
225 * This event is consumed by the devtree
226 * plug-in. The event signals the plug-in to re-run its
227 * cpu initialization function, which will cause it to add
228 * additional information to the cpu devtree nodes (particularly,
229 * the administrative state of the cpus.)
230 */
231 if (nvlist_add_string(nvl, PICLEVENTARG_EVENT_NAME,
232 PICLEVENT_CPU_STATE_CHANGE) != 0) {
233 free(nvl);
234 return;
235 }
236
237 /*
238 * The devtree plug-in needs to see a devfs path argument for
239 * any event it considers. We supply one here which is essentially
240 * a dummy since it is not processed by the devtree plug-in for
241 * this event.
242 */
243 if (nvlist_add_string(nvl, PICLEVENTARG_DEVFS_PATH, "/cpu") != 0) {
244 free(nvl);
245 return;
246 }
247 packed_nvl = NULL;
248 if (nvlist_pack(nvl, &packed_nvl, &nvl_size, NV_ENCODE_NATIVE,
249 0) != 0) {
250 free(nvl);
251 return;
252 }
253 if ((status = ptree_post_event(PICLEVENT_CPU_STATE_CHANGE,
254 packed_nvl, nvl_size, mdesc_ev_completion_handler)) !=
255 PICL_SUCCESS) {
256 free(nvl);
257 syslog(LOG_WARNING,
258 "signal_devtree: can't post cpu event: %d\n", status);
259 }
260 }
261
262 void
mdescplugin_init(void)263 mdescplugin_init(void)
264 {
265 int status;
266
267 status = ptree_get_root(&root_node);
268 if (status != PICL_SUCCESS) {
269 return;
270 }
271
272 mdp = mdesc_devinit();
273 if (mdp == NULL)
274 return;
275
276 /*
277 * update the cpu configuration in case the snapshot cache used by the
278 * devtree plugin is out of date.
279 */
280 (void) update_devices(OBP_CPU, DEV_ADD);
281 (void) update_devices(OBP_CPU, DEV_REMOVE);
282
283 rootnode = md_root_node(mdp);
284
285 /*
286 * This is the start of the CPU property augmentation code.
287 * add_cpu_prop and the rest of the CPU code lives in cpu_prop_update.c
288 */
289 status = ptree_walk_tree_by_class(root_node, "cpu", NULL, add_cpu_prop);
290 if (status != PICL_SUCCESS) {
291 return;
292 }
293
294 signal_devtree();
295
296 (void) disk_discovery();
297
298 /*
299 * register dsc_handler for both "sysevent-device-added" and
300 * and for "sysevent-device-removed" PICL events
301 */
302 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED,
303 dsc_handler, NULL);
304 (void) ptree_register_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED,
305 dsc_handler, NULL);
306 (void) ptree_register_handler(PICLEVENT_DR_AP_STATE_CHANGE,
307 dr_handler, NULL);
308
309 mdesc_devfini(mdp);
310 }
311
312 void
mdescplugin_fini(void)313 mdescplugin_fini(void)
314 {
315 /* unregister the event handler */
316 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_ADDED,
317 dsc_handler, NULL);
318 (void) ptree_unregister_handler(PICLEVENT_SYSEVENT_DEVICE_REMOVED,
319 dsc_handler, NULL);
320 (void) ptree_unregister_handler(PICLEVENT_DR_AP_STATE_CHANGE,
321 dr_handler, NULL);
322 }
323
324 void
mdescplugin_register(void)325 mdescplugin_register(void)
326 {
327 picld_plugin_register(&mdescplugin_reg);
328 }
329