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 * Copyright 2016 Nexenta Systems, Inc.
26 */
27
28 /*
29 * The intent of this file is to contain any data that must remain
30 * resident in the kernel.
31 *
32 * space_store(), space_fetch(), and space_free() have been added to
33 * easily store and retrieve kernel resident data.
34 * These functions are recommended rather than adding new variables to
35 * this file.
36 *
37 * Note that it's possible for name collisions to occur. In order to
38 * prevent collisions, it's recommended that the convention in
39 * PSARC/1997/389 be used. If a collision occurs, then space_store will
40 * fail.
41 */
42
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/var.h>
46 #include <sys/proc.h>
47 #include <sys/signal.h>
48 #include <sys/utsname.h>
49 #include <sys/buf.h>
50 #include <sys/cred.h>
51 #include <sys/vfs.h>
52 #include <sys/vnode.h>
53 #include <sys/sysinfo.h>
54 #include <sys/t_lock.h>
55 #include <sys/vmem.h>
56 #include <sys/modhash.h>
57 #include <sys/cmn_err.h>
58
59 #include <sys/strredir.h>
60 #include <sys/kbio.h>
61 #include <sys/consdev.h>
62 #include <sys/wscons.h>
63 #include <sys/bootprops.h>
64
65 struct buf bfreelist; /* Head of the free list of buffers */
66
67 sysinfo_t sysinfo;
68 vminfo_t vminfo; /* VM stats protected by sysinfolock mutex */
69
70 #ifdef lint
71 int __lintzero; /* Alway zero for shutting up lint */
72 #endif
73
74 /*
75 * The following describe the physical memory configuration.
76 *
77 * physmem - The amount of physical memory configured
78 * in pages. ptob(physmem) is the amount
79 * of physical memory in bytes. Defined in
80 * .../os/startup.c.
81 *
82 * physmax - The highest numbered physical page in memory.
83 *
84 * maxmem - Maximum available memory, in pages. Defined
85 * in main.c.
86 *
87 * physinstalled
88 * - Pages of physical memory installed;
89 * includes use by PROM/boot not counted in
90 * physmem.
91 */
92
93 pfn_t physmax;
94 pgcnt_t physinstalled;
95
96 struct var v;
97
98 #include <sys/systm.h>
99 #include <sys/conf.h>
100 #include <sys/kmem.h>
101 #include <sys/sysmacros.h>
102 #include <sys/bootconf.h>
103
104 /*
105 * Data for segkmem pages that should be resident
106 */
107 struct vnode kvps[KV_MAX];
108
109 /*
110 * Data from swapgeneric.c that must be resident.
111 */
112 struct vnode *rootvp; /* vnode of the root device */
113 dev_t rootdev; /* dev_t of the root device */
114 boolean_t root_is_ramdisk; /* root is ramdisk */
115 uint32_t ramdisk_size; /* (KB) currently set only for sparc netboots */
116
117 /*
118 * dhcp
119 */
120 #include <sys/socket.h>
121 #include <sys/errno.h>
122 #include <sys/sockio.h>
123 #include <sys/stream.h>
124 #include <sys/stropts.h>
125 #include <sys/dlpi.h>
126 #include <net/if.h>
127
128 int netboot;
129 int obpdebug;
130 char *dhcack; /* dhcp response packet */
131 int dhcacklen;
132 char *netdev_path; /* Used to cache the netdev_path handed up by boot */
133 char dhcifname[IFNAMSIZ];
134
135 /*
136 * Data from arp.c that must be resident.
137 */
138 #include <net/if_arp.h>
139 #include <netinet/in.h>
140 #include <netinet/in_var.h>
141 #include <netinet/if_ether.h>
142
143 ether_addr_t etherbroadcastaddr = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
144
145
146 /*
147 * Data from timod that must be resident
148 */
149
150 /*
151 * state transition table for TI interface
152 */
153 #include <sys/tihdr.h>
154
155 #define nr 127 /* not reachable */
156
157 char ti_statetbl[TE_NOEVENTS][TS_NOSTATES] = {
158 /* STATES */
159 /* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
160
161 { 1, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
162 {nr, nr, nr, 2, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
163 {nr, nr, nr, 4, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
164 {nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
165 {nr, nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
166 {nr, 0, 3, nr, 3, 3, nr, nr, 7, nr, nr, nr, 6, 7, 9, 10, 11},
167 {nr, nr, 0, nr, nr, 6, nr, nr, nr, nr, nr, nr, 3, nr, 3, 3, 3},
168 {nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, nr, nr, nr, 3, nr, nr, nr},
169 {nr, nr, nr, nr, nr, nr, nr, nr, 3, nr, nr, nr, nr, 3, nr, nr, nr},
170 {nr, nr, nr, nr, nr, nr, nr, nr, 7, nr, nr, nr, nr, 7, nr, nr, nr},
171 {nr, nr, nr, 5, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
172 {nr, nr, nr, nr, nr, nr, nr, 8, nr, nr, nr, nr, nr, nr, nr, nr, nr},
173 {nr, nr, nr, nr, nr, nr, 12, 13, nr, 14, 15, 16, nr, nr, nr, nr, nr},
174 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, 11, nr, nr, nr, nr, nr},
175 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, nr, 11, nr, nr, nr, nr, nr},
176 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 10, nr, 3, nr, nr, nr, nr, nr},
177 {nr, nr, nr, 7, nr, nr, nr, 7, nr, nr, nr, nr, nr, nr, nr, nr, nr},
178 {nr, nr, nr, nr, nr, nr, 9, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
179 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, 10, nr, nr, nr, nr, nr, nr},
180 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 9, 10, nr, nr, nr, nr, nr, nr},
181 {nr, nr, nr, nr, nr, nr, nr, nr, nr, 11, 3, nr, nr, nr, nr, nr, nr},
182 {nr, nr, nr, nr, nr, nr, 3, nr, nr, 3, 3, 3, nr, nr, nr, nr, nr},
183 {nr, nr, nr, nr, nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr},
184 {nr, nr, nr, nr, nr, nr, nr, 7, nr, nr, nr, nr, nr, nr, nr, nr, nr},
185 {nr, nr, nr, 9, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
186 {nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
187 {nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
188 {nr, nr, nr, 3, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr, nr},
189 };
190
191
192 #include <sys/tty.h>
193 #include <sys/ptyvar.h>
194
195 static void store_fetch_initspace();
196
197 /*
198 * Allocate tunable structures at runtime.
199 */
200 void
201 space_init(void)
202 {
203 pty_initspace();
204 store_fetch_initspace();
205 }
206
207 int ts_dispatch_extended = -1; /* set in ts_getdptbl or set_platform_default */
208
209 /*
210 * Previously defined in consmsconf.c ...
211 */
212 dev_t kbddev = NODEV;
213 dev_t mousedev = NODEV;
214 dev_t stdindev = NODEV;
215 struct vnode *wsconsvp;
216
217 dev_t fbdev = NODEV;
218 struct vnode *fbvp;
219 dev_info_t *fbdip;
220
221 /*
222 * moved from cons.c because they must be resident in the kernel.
223 */
224 vnode_t *rconsvp;
225 dev_t rconsdev;
226 dev_t uconsdev = NODEV;
227
228 /*
229 * serial virtual console vnode pointer.
230 */
231 vnode_t *vsconsvp = NULL;
232
233 /*
234 * Flag whether console fb output is using PROM/PROM emulation
235 * terminal emulator, or is using the kernel terminal emulator.
236 */
237 int consmode = CONS_FW;
238
239 /*
240 * The following allows systems to disable use of the kernel
241 * terminal emulator (retreat to PROM terminal emulator if there
242 * is PROM).
243 */
244 int cons_tem_disable;
245
246 /*
247 * consconfig() in autoconf.c sets this; it's the vnode of the distinguished
248 * keyboard/frame buffer combination, aka the workstation console.
249 */
250 vnode_t *rwsconsvp;
251 dev_t rwsconsdev;
252
253 /*
254 * Platform console abort policy.
255 * Platforms may override the default software policy, if such hardware
256 * (e.g. keyswitches with a secure position) exists.
257 */
258 int abort_enable = KIOCABORTENABLE;
259
260 /* from cpc.c */
261 uint_t kcpc_key; /* TSD key for CPU performance counter context */
262
263 /*
264 * storing and retrieving data by string key
265 *
266 * this mechanism allows a consumer to store and retrieve by name a pointer
267 * to some space maintained by the consumer.
268 * For example, a driver or module may want to have persistent data
269 * over unloading/loading cycles. The pointer is typically to some
270 * kmem_alloced space and it should not be pointing to data that will
271 * be destroyed when the module is unloaded.
272 */
273 static mod_hash_t *space_hash;
274 static char *space_hash_name = "space_hash";
275 static size_t space_hash_nchains = 8;
276
277 static void
278 store_fetch_initspace()
279 {
280 space_hash = mod_hash_create_strhash(space_hash_name,
281 space_hash_nchains, mod_hash_null_valdtor);
282 ASSERT(space_hash);
283 }
284
285 int
286 space_store(char *key, uintptr_t ptr)
287 {
288 char *s;
289 int rval;
290 size_t l;
291
292 /* some sanity checks first */
293 if (key == NULL) {
294 return (-1);
295 }
296 l = (size_t)strlen(key);
297 if (l == 0) {
298 return (-1);
299 }
300
301 /* increment for null terminator */
302 l++;
303
304 /* alloc space for the string, mod_hash_insert will deallocate */
305 s = kmem_alloc(l, KM_SLEEP);
306 bcopy(key, s, l);
307
308 rval = mod_hash_insert(space_hash,
309 (mod_hash_key_t)s, (mod_hash_val_t)ptr);
310
311 switch (rval) {
312 case 0:
313 break;
314 #ifdef DEBUG
315 case MH_ERR_DUPLICATE:
316 cmn_err(CE_WARN, "space_store: duplicate key %s", key);
317 rval = -1;
318 break;
319 case MH_ERR_NOMEM:
320 cmn_err(CE_WARN, "space_store: no mem for key %s", key);
321 rval = -1;
322 break;
323 default:
324 cmn_err(CE_WARN, "space_store: unspecified error for key %s",
325 key);
326 rval = -1;
327 break;
328 #else
329 default:
330 rval = -1;
331 break;
332 #endif
333 }
334
335 return (rval);
336 }
337
338 uintptr_t
339 space_fetch(char *key)
340 {
341 uintptr_t ptr = 0;
342 mod_hash_val_t val;
343 int rval;
344
345 if (key) {
346 rval = mod_hash_find(space_hash, (mod_hash_key_t)key, &val);
347 if (rval == 0) {
348 ptr = (uintptr_t)val;
349 }
350 }
351
352 return (ptr);
353 }
354
355 void
356 space_free(char *key)
357 {
358 if (key) {
359 (void) mod_hash_destroy(space_hash, (mod_hash_key_t)key);
360 }
361 }
362
363 /*
364 * Support for CRC32. At present all calculations are done in simple
365 * macros, so all we need is somewhere to declare the global lookup table.
366 */
367
368 #include <sys/crc32.h>
369
370 const uint32_t crc32_table[256] = { CRC32_TABLE };
371
372 /*
373 * We need to fanout load from NIC which can overwhelm a single CPU.
374 * This becomes especially important on systems having slow CPUs
375 * (sun4v architecture). mac_soft_ring_enable is false on all
376 * systems except sun4v. On sun4v, they get enabled by default (see
377 * sun4v/os/mach_startup.c).
378 */
379 boolean_t mac_soft_ring_enable = B_FALSE;
380
381 /*
382 * Global iscsi boot prop
383 */
384 ib_boot_prop_t *iscsiboot_prop = NULL;