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 * Copyright 2020 Joyent, Inc.
27 */
28
29 /*
30 * The intent of this file is to contain any data that must remain
31 * resident in the kernel.
32 *
33 * space_store(), space_fetch(), and space_free() have been added to
34 * easily store and retrieve kernel resident data.
35 * These functions are recommended rather than adding new variables to
36 * this file.
37 *
38 * Note that it's possible for name collisions to occur. In order to
39 * prevent collisions, it's recommended that the convention in
40 * PSARC/1997/389 be used. If a collision occurs, then space_store will
41 * fail.
42 */
43
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/var.h>
47 #include <sys/proc.h>
48 #include <sys/signal.h>
49 #include <sys/utsname.h>
50 #include <sys/buf.h>
51 #include <sys/cred.h>
52 #include <sys/vfs.h>
53 #include <sys/vnode.h>
54 #include <sys/sysinfo.h>
55 #include <sys/t_lock.h>
56 #include <sys/vmem.h>
57 #include <sys/modhash.h>
58 #include <sys/cmn_err.h>
59
60 #include <sys/strredir.h>
61 #include <sys/kbio.h>
62 #include <sys/consdev.h>
63 #include <sys/wscons.h>
64 #include <sys/bootprops.h>
65
66 struct buf bfreelist; /* Head of the free list of buffers */
67
68 sysinfo_t sysinfo;
69 vminfo_t vminfo; /* VM stats protected by sysinfolock mutex */
70
71 #ifdef lint
72 int __lintzero; /* Alway zero for shutting up lint */
73 #endif
74
75 /*
76 * The following describe the physical memory configuration.
77 *
78 * physmem - The amount of physical memory configured
79 * in pages. ptob(physmem) is the amount
80 * of physical memory in bytes. Defined in
81 * .../os/startup.c.
82 *
83 * physmax - The highest numbered physical page in memory.
84 *
85 * maxmem - Maximum available memory, in pages. Defined
86 * in main.c.
87 *
88 * physinstalled
89 * - Pages of physical memory installed;
90 * includes use by PROM/boot not counted in
91 * physmem.
92 */
93
94 pfn_t physmax;
95 pgcnt_t physinstalled;
96
97 #include <sys/systm.h>
98 #include <sys/conf.h>
99 #include <sys/kmem.h>
100 #include <sys/sysmacros.h>
101 #include <sys/bootconf.h>
102
103 /*
104 * Data for segkmem pages that should be resident
105 */
106 struct vnode kvps[KV_MAX];
107
108 /*
109 * Data from swapgeneric.c that must be resident.
110 */
111 struct vnode *rootvp; /* vnode of the root device */
112 dev_t rootdev; /* dev_t of the root device */
113 boolean_t root_is_ramdisk; /* root is ramdisk */
114 uint32_t ramdisk_size; /* (KB) currently set only for sparc netboots */
115
116 /*
117 * dhcp
118 */
119 #include <sys/socket.h>
120 #include <sys/errno.h>
121 #include <sys/sockio.h>
122 #include <sys/stream.h>
123 #include <sys/stropts.h>
124 #include <sys/dlpi.h>
125 #include <net/if.h>
126
127 int netboot;
128 int obpdebug;
129 char *dhcack; /* dhcp response packet */
130 int dhcacklen;
131 char *netdev_path; /* Used to cache the netdev_path handed up by boot */
132 char dhcifname[IFNAMSIZ];
133
134 /*
135 * Data from arp.c that must be resident.
136 */
137 #include <net/if_arp.h>
138 #include <netinet/in.h>
139 #include <netinet/in_var.h>
140 #include <netinet/if_ether.h>
141
142 ether_addr_t etherbroadcastaddr = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
143
144 #include <sys/tty.h>
145 #include <sys/ptyvar.h>
146
147 static void store_fetch_initspace();
148
149 /*
150 * Allocate tunable structures at runtime.
151 */
152 void
space_init(void)153 space_init(void)
154 {
155 pty_initspace();
156 store_fetch_initspace();
157 }
158
159 int ts_dispatch_extended = -1; /* set in ts_getdptbl or set_platform_default */
160
161 /*
162 * Previously defined in consmsconf.c ...
163 */
164 dev_t kbddev = NODEV;
165 dev_t mousedev = NODEV;
166 dev_t stdindev = NODEV;
167 dev_t diagdev = NODEV;
168 struct vnode *wsconsvp;
169
170 dev_t fbdev = NODEV;
171 struct vnode *fbvp;
172 dev_info_t *fbdip;
173
174 /*
175 * moved from cons.c because they must be resident in the kernel.
176 */
177 vnode_t *rconsvp;
178 dev_t rconsdev;
179 dev_t uconsdev = NODEV;
180
181 /*
182 * serial virtual console vnode pointer.
183 */
184 vnode_t *vsconsvp = NULL;
185
186 /*
187 * Flag whether console fb output is using PROM/PROM emulation
188 * terminal emulator, or is using the kernel terminal emulator.
189 */
190 int consmode = CONS_FW;
191
192 /*
193 * The following allows systems to disable use of the kernel
194 * terminal emulator (retreat to PROM terminal emulator if there
195 * is PROM).
196 */
197 int cons_tem_disable;
198
199 /*
200 * consconfig() in autoconf.c sets this; it's the vnode of the distinguished
201 * keyboard/frame buffer combination, aka the workstation console.
202 */
203 vnode_t *rwsconsvp;
204 dev_t rwsconsdev;
205
206 /*
207 * Platform console abort policy.
208 * Platforms may override the default software policy, if such hardware
209 * (e.g. keyswitches with a secure position) exists.
210 */
211 int abort_enable = KIOCABORTENABLE;
212
213 /* from cpc.c */
214 uint_t kcpc_key; /* TSD key for CPU performance counter context */
215
216 /*
217 * storing and retrieving data by string key
218 *
219 * this mechanism allows a consumer to store and retrieve by name a pointer
220 * to some space maintained by the consumer.
221 * For example, a driver or module may want to have persistent data
222 * over unloading/loading cycles. The pointer is typically to some
223 * kmem_alloced space and it should not be pointing to data that will
224 * be destroyed when the module is unloaded.
225 */
226 static mod_hash_t *space_hash;
227 static char *space_hash_name = "space_hash";
228 static size_t space_hash_nchains = 8;
229
230 static void
store_fetch_initspace()231 store_fetch_initspace()
232 {
233 space_hash = mod_hash_create_strhash(space_hash_name,
234 space_hash_nchains, mod_hash_null_valdtor);
235 ASSERT(space_hash);
236 }
237
238 int
space_store(char * key,uintptr_t ptr)239 space_store(char *key, uintptr_t ptr)
240 {
241 char *s;
242 int rval;
243 size_t l;
244
245 /* some sanity checks first */
246 if (key == NULL) {
247 return (-1);
248 }
249 l = (size_t)strlen(key);
250 if (l == 0) {
251 return (-1);
252 }
253
254 /* increment for null terminator */
255 l++;
256
257 /* alloc space for the string, mod_hash_insert will deallocate */
258 s = kmem_alloc(l, KM_SLEEP);
259 bcopy(key, s, l);
260
261 rval = mod_hash_insert(space_hash,
262 (mod_hash_key_t)s, (mod_hash_val_t)ptr);
263
264 switch (rval) {
265 case 0:
266 break;
267 #ifdef DEBUG
268 case MH_ERR_DUPLICATE:
269 cmn_err(CE_WARN, "space_store: duplicate key %s", key);
270 rval = -1;
271 break;
272 case MH_ERR_NOMEM:
273 cmn_err(CE_WARN, "space_store: no mem for key %s", key);
274 rval = -1;
275 break;
276 default:
277 cmn_err(CE_WARN, "space_store: unspecified error for key %s",
278 key);
279 rval = -1;
280 break;
281 #else
282 default:
283 rval = -1;
284 break;
285 #endif
286 }
287
288 return (rval);
289 }
290
291 uintptr_t
space_fetch(char * key)292 space_fetch(char *key)
293 {
294 uintptr_t ptr = 0;
295 mod_hash_val_t val;
296 int rval;
297
298 if (key) {
299 rval = mod_hash_find(space_hash, (mod_hash_key_t)key, &val);
300 if (rval == 0) {
301 ptr = (uintptr_t)val;
302 }
303 }
304
305 return (ptr);
306 }
307
308 void
space_free(char * key)309 space_free(char *key)
310 {
311 if (key) {
312 (void) mod_hash_destroy(space_hash, (mod_hash_key_t)key);
313 }
314 }
315
316 /*
317 * Support for CRC32. At present all calculations are done in simple
318 * macros, so all we need is somewhere to declare the global lookup table.
319 */
320
321 #include <sys/crc32.h>
322
323 const uint32_t crc32_table[256] = { CRC32_TABLE };
324
325 /*
326 * We need to fanout load from NIC which can overwhelm a single CPU.
327 * This becomes especially important on systems having slow CPUs
328 * (sun4v architecture). mac_soft_ring_enable is false on all
329 * systems except sun4v. On sun4v, they get enabled by default (see
330 * sun4v/os/mach_startup.c).
331 */
332 boolean_t mac_soft_ring_enable = B_FALSE;
333
334 /*
335 * Global iscsi boot prop
336 */
337 ib_boot_prop_t *iscsiboot_prop = NULL;
338