Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ipmi_msghandler.c |
| 3 | * |
| 4 | * Incoming and outgoing message routing for an IPMI interface. |
| 5 | * |
| 6 | * Author: MontaVista Software, Inc. |
| 7 | * Corey Minyard <minyard@mvista.com> |
| 8 | * source@mvista.com |
| 9 | * |
| 10 | * Copyright 2002 MontaVista Software Inc. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| 26 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| 27 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | * |
| 29 | * You should have received a copy of the GNU General Public License along |
| 30 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 31 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/config.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/errno.h> |
| 37 | #include <asm/system.h> |
| 38 | #include <linux/sched.h> |
| 39 | #include <linux/poll.h> |
| 40 | #include <linux/spinlock.h> |
| 41 | #include <linux/rwsem.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/ipmi.h> |
| 44 | #include <linux/ipmi_smi.h> |
| 45 | #include <linux/notifier.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/proc_fs.h> |
| 48 | |
| 49 | #define PFX "IPMI message handler: " |
| 50 | #define IPMI_MSGHANDLER_VERSION "v33" |
| 51 | |
| 52 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); |
| 53 | static int ipmi_init_msghandler(void); |
| 54 | |
| 55 | static int initialized = 0; |
| 56 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 57 | #ifdef CONFIG_PROC_FS |
| 58 | struct proc_dir_entry *proc_ipmi_root = NULL; |
| 59 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #define MAX_EVENTS_IN_QUEUE 25 |
| 62 | |
| 63 | /* Don't let a message sit in a queue forever, always time it with at lest |
| 64 | the max message timer. This is in milliseconds. */ |
| 65 | #define MAX_MSG_TIMEOUT 60000 |
| 66 | |
| 67 | struct ipmi_user |
| 68 | { |
| 69 | struct list_head link; |
| 70 | |
| 71 | /* The upper layer that handles receive messages. */ |
| 72 | struct ipmi_user_hndl *handler; |
| 73 | void *handler_data; |
| 74 | |
| 75 | /* The interface this user is bound to. */ |
| 76 | ipmi_smi_t intf; |
| 77 | |
| 78 | /* Does this interface receive IPMI events? */ |
| 79 | int gets_events; |
| 80 | }; |
| 81 | |
| 82 | struct cmd_rcvr |
| 83 | { |
| 84 | struct list_head link; |
| 85 | |
| 86 | ipmi_user_t user; |
| 87 | unsigned char netfn; |
| 88 | unsigned char cmd; |
| 89 | }; |
| 90 | |
| 91 | struct seq_table |
| 92 | { |
| 93 | unsigned int inuse : 1; |
| 94 | unsigned int broadcast : 1; |
| 95 | |
| 96 | unsigned long timeout; |
| 97 | unsigned long orig_timeout; |
| 98 | unsigned int retries_left; |
| 99 | |
| 100 | /* To verify on an incoming send message response that this is |
| 101 | the message that the response is for, we keep a sequence id |
| 102 | and increment it every time we send a message. */ |
| 103 | long seqid; |
| 104 | |
| 105 | /* This is held so we can properly respond to the message on a |
| 106 | timeout, and it is used to hold the temporary data for |
| 107 | retransmission, too. */ |
| 108 | struct ipmi_recv_msg *recv_msg; |
| 109 | }; |
| 110 | |
| 111 | /* Store the information in a msgid (long) to allow us to find a |
| 112 | sequence table entry from the msgid. */ |
| 113 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) |
| 114 | |
| 115 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ |
| 116 | do { \ |
| 117 | seq = ((msgid >> 26) & 0x3f); \ |
| 118 | seqid = (msgid & 0x3fffff); \ |
| 119 | } while(0) |
| 120 | |
| 121 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) |
| 122 | |
| 123 | struct ipmi_channel |
| 124 | { |
| 125 | unsigned char medium; |
| 126 | unsigned char protocol; |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 127 | |
| 128 | /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, |
| 129 | but may be changed by the user. */ |
| 130 | unsigned char address; |
| 131 | |
| 132 | /* My LUN. This should generally stay the SMS LUN, but just in |
| 133 | case... */ |
| 134 | unsigned char lun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | }; |
| 136 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 137 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | struct ipmi_proc_entry |
| 139 | { |
| 140 | char *name; |
| 141 | struct ipmi_proc_entry *next; |
| 142 | }; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 143 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | #define IPMI_IPMB_NUM_SEQ 64 |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 146 | #define IPMI_MAX_CHANNELS 16 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | struct ipmi_smi |
| 148 | { |
| 149 | /* What interface number are we? */ |
| 150 | int intf_num; |
| 151 | |
| 152 | /* The list of upper layers that are using me. We read-lock |
| 153 | this when delivering messages to the upper layer to keep |
| 154 | the user from going away while we are processing the |
| 155 | message. This means that you cannot add or delete a user |
| 156 | from the receive callback. */ |
| 157 | rwlock_t users_lock; |
| 158 | struct list_head users; |
| 159 | |
| 160 | /* Used for wake ups at startup. */ |
| 161 | wait_queue_head_t waitq; |
| 162 | |
| 163 | /* The IPMI version of the BMC on the other end. */ |
| 164 | unsigned char version_major; |
| 165 | unsigned char version_minor; |
| 166 | |
| 167 | /* This is the lower-layer's sender routine. */ |
| 168 | struct ipmi_smi_handlers *handlers; |
| 169 | void *send_info; |
| 170 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 171 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* A list of proc entries for this interface. This does not |
| 173 | need a lock, only one thread creates it and only one thread |
| 174 | destroys it. */ |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 175 | spinlock_t proc_entry_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | struct ipmi_proc_entry *proc_entries; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 177 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | /* A table of sequence numbers for this interface. We use the |
| 180 | sequence numbers for IPMB messages that go out of the |
| 181 | interface to match them up with their responses. A routine |
| 182 | is called periodically to time the items in this list. */ |
| 183 | spinlock_t seq_lock; |
| 184 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; |
| 185 | int curr_seq; |
| 186 | |
| 187 | /* Messages that were delayed for some reason (out of memory, |
| 188 | for instance), will go in here to be processed later in a |
| 189 | periodic timer interrupt. */ |
| 190 | spinlock_t waiting_msgs_lock; |
| 191 | struct list_head waiting_msgs; |
| 192 | |
| 193 | /* The list of command receivers that are registered for commands |
| 194 | on this interface. */ |
| 195 | rwlock_t cmd_rcvr_lock; |
| 196 | struct list_head cmd_rcvrs; |
| 197 | |
| 198 | /* Events that were queues because no one was there to receive |
| 199 | them. */ |
| 200 | spinlock_t events_lock; /* For dealing with event stuff. */ |
| 201 | struct list_head waiting_events; |
| 202 | unsigned int waiting_events_count; /* How many events in queue? */ |
| 203 | |
| 204 | /* This will be non-null if someone registers to receive all |
| 205 | IPMI commands (this is for interface emulation). There |
| 206 | may not be any things in the cmd_rcvrs list above when |
| 207 | this is registered. */ |
| 208 | ipmi_user_t all_cmd_rcvr; |
| 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /* The event receiver for my BMC, only really used at panic |
| 211 | shutdown as a place to store this. */ |
| 212 | unsigned char event_receiver; |
| 213 | unsigned char event_receiver_lun; |
| 214 | unsigned char local_sel_device; |
| 215 | unsigned char local_event_generator; |
| 216 | |
| 217 | /* A cheap hack, if this is non-null and a message to an |
| 218 | interface comes in with a NULL user, call this routine with |
| 219 | it. Note that the message will still be freed by the |
| 220 | caller. This only works on the system interface. */ |
| 221 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_smi_msg *msg); |
| 222 | |
| 223 | /* When we are scanning the channels for an SMI, this will |
| 224 | tell which channel we are scanning. */ |
| 225 | int curr_channel; |
| 226 | |
| 227 | /* Channel information */ |
| 228 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; |
| 229 | |
| 230 | /* Proc FS stuff. */ |
| 231 | struct proc_dir_entry *proc_dir; |
| 232 | char proc_dir_name[10]; |
| 233 | |
| 234 | spinlock_t counter_lock; /* For making counters atomic. */ |
| 235 | |
| 236 | /* Commands we got that were invalid. */ |
| 237 | unsigned int sent_invalid_commands; |
| 238 | |
| 239 | /* Commands we sent to the MC. */ |
| 240 | unsigned int sent_local_commands; |
| 241 | /* Responses from the MC that were delivered to a user. */ |
| 242 | unsigned int handled_local_responses; |
| 243 | /* Responses from the MC that were not delivered to a user. */ |
| 244 | unsigned int unhandled_local_responses; |
| 245 | |
| 246 | /* Commands we sent out to the IPMB bus. */ |
| 247 | unsigned int sent_ipmb_commands; |
| 248 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
| 249 | unsigned int sent_ipmb_command_errs; |
| 250 | /* Each retransmit increments this count. */ |
| 251 | unsigned int retransmitted_ipmb_commands; |
| 252 | /* When a message times out (runs out of retransmits) this is |
| 253 | incremented. */ |
| 254 | unsigned int timed_out_ipmb_commands; |
| 255 | |
| 256 | /* This is like above, but for broadcasts. Broadcasts are |
| 257 | *not* included in the above count (they are expected to |
| 258 | time out). */ |
| 259 | unsigned int timed_out_ipmb_broadcasts; |
| 260 | |
| 261 | /* Responses I have sent to the IPMB bus. */ |
| 262 | unsigned int sent_ipmb_responses; |
| 263 | |
| 264 | /* The response was delivered to the user. */ |
| 265 | unsigned int handled_ipmb_responses; |
| 266 | /* The response had invalid data in it. */ |
| 267 | unsigned int invalid_ipmb_responses; |
| 268 | /* The response didn't have anyone waiting for it. */ |
| 269 | unsigned int unhandled_ipmb_responses; |
| 270 | |
| 271 | /* Commands we sent out to the IPMB bus. */ |
| 272 | unsigned int sent_lan_commands; |
| 273 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
| 274 | unsigned int sent_lan_command_errs; |
| 275 | /* Each retransmit increments this count. */ |
| 276 | unsigned int retransmitted_lan_commands; |
| 277 | /* When a message times out (runs out of retransmits) this is |
| 278 | incremented. */ |
| 279 | unsigned int timed_out_lan_commands; |
| 280 | |
| 281 | /* Responses I have sent to the IPMB bus. */ |
| 282 | unsigned int sent_lan_responses; |
| 283 | |
| 284 | /* The response was delivered to the user. */ |
| 285 | unsigned int handled_lan_responses; |
| 286 | /* The response had invalid data in it. */ |
| 287 | unsigned int invalid_lan_responses; |
| 288 | /* The response didn't have anyone waiting for it. */ |
| 289 | unsigned int unhandled_lan_responses; |
| 290 | |
| 291 | /* The command was delivered to the user. */ |
| 292 | unsigned int handled_commands; |
| 293 | /* The command had invalid data in it. */ |
| 294 | unsigned int invalid_commands; |
| 295 | /* The command didn't have anyone waiting for it. */ |
| 296 | unsigned int unhandled_commands; |
| 297 | |
| 298 | /* Invalid data in an event. */ |
| 299 | unsigned int invalid_events; |
| 300 | /* Events that were received with the proper format. */ |
| 301 | unsigned int events; |
| 302 | }; |
| 303 | |
| 304 | #define MAX_IPMI_INTERFACES 4 |
| 305 | static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES]; |
| 306 | |
| 307 | /* Used to keep interfaces from going away while operations are |
| 308 | operating on interfaces. Grab read if you are not modifying the |
| 309 | interfaces, write if you are. */ |
| 310 | static DECLARE_RWSEM(interfaces_sem); |
| 311 | |
| 312 | /* Directly protects the ipmi_interfaces data structure. This is |
| 313 | claimed in the timer interrupt. */ |
| 314 | static DEFINE_SPINLOCK(interfaces_lock); |
| 315 | |
| 316 | /* List of watchers that want to know when smi's are added and |
| 317 | deleted. */ |
| 318 | static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers); |
| 319 | static DECLARE_RWSEM(smi_watchers_sem); |
| 320 | |
| 321 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
| 322 | { |
| 323 | int i; |
| 324 | |
| 325 | down_read(&interfaces_sem); |
| 326 | down_write(&smi_watchers_sem); |
| 327 | list_add(&(watcher->link), &smi_watchers); |
| 328 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 329 | if (ipmi_interfaces[i] != NULL) { |
| 330 | watcher->new_smi(i); |
| 331 | } |
| 332 | } |
| 333 | up_write(&smi_watchers_sem); |
| 334 | up_read(&interfaces_sem); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) |
| 339 | { |
| 340 | down_write(&smi_watchers_sem); |
| 341 | list_del(&(watcher->link)); |
| 342 | up_write(&smi_watchers_sem); |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | static void |
| 347 | call_smi_watchers(int i) |
| 348 | { |
| 349 | struct ipmi_smi_watcher *w; |
| 350 | |
| 351 | down_read(&smi_watchers_sem); |
| 352 | list_for_each_entry(w, &smi_watchers, link) { |
| 353 | if (try_module_get(w->owner)) { |
| 354 | w->new_smi(i); |
| 355 | module_put(w->owner); |
| 356 | } |
| 357 | } |
| 358 | up_read(&smi_watchers_sem); |
| 359 | } |
| 360 | |
| 361 | static int |
| 362 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) |
| 363 | { |
| 364 | if (addr1->addr_type != addr2->addr_type) |
| 365 | return 0; |
| 366 | |
| 367 | if (addr1->channel != addr2->channel) |
| 368 | return 0; |
| 369 | |
| 370 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { |
| 371 | struct ipmi_system_interface_addr *smi_addr1 |
| 372 | = (struct ipmi_system_interface_addr *) addr1; |
| 373 | struct ipmi_system_interface_addr *smi_addr2 |
| 374 | = (struct ipmi_system_interface_addr *) addr2; |
| 375 | return (smi_addr1->lun == smi_addr2->lun); |
| 376 | } |
| 377 | |
| 378 | if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) |
| 379 | || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
| 380 | { |
| 381 | struct ipmi_ipmb_addr *ipmb_addr1 |
| 382 | = (struct ipmi_ipmb_addr *) addr1; |
| 383 | struct ipmi_ipmb_addr *ipmb_addr2 |
| 384 | = (struct ipmi_ipmb_addr *) addr2; |
| 385 | |
| 386 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) |
| 387 | && (ipmb_addr1->lun == ipmb_addr2->lun)); |
| 388 | } |
| 389 | |
| 390 | if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { |
| 391 | struct ipmi_lan_addr *lan_addr1 |
| 392 | = (struct ipmi_lan_addr *) addr1; |
| 393 | struct ipmi_lan_addr *lan_addr2 |
| 394 | = (struct ipmi_lan_addr *) addr2; |
| 395 | |
| 396 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) |
| 397 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) |
| 398 | && (lan_addr1->session_handle |
| 399 | == lan_addr2->session_handle) |
| 400 | && (lan_addr1->lun == lan_addr2->lun)); |
| 401 | } |
| 402 | |
| 403 | return 1; |
| 404 | } |
| 405 | |
| 406 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) |
| 407 | { |
| 408 | if (len < sizeof(struct ipmi_system_interface_addr)) { |
| 409 | return -EINVAL; |
| 410 | } |
| 411 | |
| 412 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { |
| 413 | if (addr->channel != IPMI_BMC_CHANNEL) |
| 414 | return -EINVAL; |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | if ((addr->channel == IPMI_BMC_CHANNEL) |
| 419 | || (addr->channel >= IPMI_NUM_CHANNELS) |
| 420 | || (addr->channel < 0)) |
| 421 | return -EINVAL; |
| 422 | |
| 423 | if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) |
| 424 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
| 425 | { |
| 426 | if (len < sizeof(struct ipmi_ipmb_addr)) { |
| 427 | return -EINVAL; |
| 428 | } |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { |
| 433 | if (len < sizeof(struct ipmi_lan_addr)) { |
| 434 | return -EINVAL; |
| 435 | } |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | return -EINVAL; |
| 440 | } |
| 441 | |
| 442 | unsigned int ipmi_addr_length(int addr_type) |
| 443 | { |
| 444 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
| 445 | return sizeof(struct ipmi_system_interface_addr); |
| 446 | |
| 447 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) |
| 448 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
| 449 | { |
| 450 | return sizeof(struct ipmi_ipmb_addr); |
| 451 | } |
| 452 | |
| 453 | if (addr_type == IPMI_LAN_ADDR_TYPE) |
| 454 | return sizeof(struct ipmi_lan_addr); |
| 455 | |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | static void deliver_response(struct ipmi_recv_msg *msg) |
| 460 | { |
| 461 | msg->user->handler->ipmi_recv_hndl(msg, msg->user->handler_data); |
| 462 | } |
| 463 | |
| 464 | /* Find the next sequence number not being used and add the given |
| 465 | message with the given timeout to the sequence table. This must be |
| 466 | called with the interface's seq_lock held. */ |
| 467 | static int intf_next_seq(ipmi_smi_t intf, |
| 468 | struct ipmi_recv_msg *recv_msg, |
| 469 | unsigned long timeout, |
| 470 | int retries, |
| 471 | int broadcast, |
| 472 | unsigned char *seq, |
| 473 | long *seqid) |
| 474 | { |
| 475 | int rv = 0; |
| 476 | unsigned int i; |
| 477 | |
| 478 | for (i=intf->curr_seq; |
| 479 | (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
| 480 | i=(i+1)%IPMI_IPMB_NUM_SEQ) |
| 481 | { |
| 482 | if (! intf->seq_table[i].inuse) |
| 483 | break; |
| 484 | } |
| 485 | |
| 486 | if (! intf->seq_table[i].inuse) { |
| 487 | intf->seq_table[i].recv_msg = recv_msg; |
| 488 | |
| 489 | /* Start with the maximum timeout, when the send response |
| 490 | comes in we will start the real timer. */ |
| 491 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
| 492 | intf->seq_table[i].orig_timeout = timeout; |
| 493 | intf->seq_table[i].retries_left = retries; |
| 494 | intf->seq_table[i].broadcast = broadcast; |
| 495 | intf->seq_table[i].inuse = 1; |
| 496 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); |
| 497 | *seq = i; |
| 498 | *seqid = intf->seq_table[i].seqid; |
| 499 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; |
| 500 | } else { |
| 501 | rv = -EAGAIN; |
| 502 | } |
| 503 | |
| 504 | return rv; |
| 505 | } |
| 506 | |
| 507 | /* Return the receive message for the given sequence number and |
| 508 | release the sequence number so it can be reused. Some other data |
| 509 | is passed in to be sure the message matches up correctly (to help |
| 510 | guard against message coming in after their timeout and the |
| 511 | sequence number being reused). */ |
| 512 | static int intf_find_seq(ipmi_smi_t intf, |
| 513 | unsigned char seq, |
| 514 | short channel, |
| 515 | unsigned char cmd, |
| 516 | unsigned char netfn, |
| 517 | struct ipmi_addr *addr, |
| 518 | struct ipmi_recv_msg **recv_msg) |
| 519 | { |
| 520 | int rv = -ENODEV; |
| 521 | unsigned long flags; |
| 522 | |
| 523 | if (seq >= IPMI_IPMB_NUM_SEQ) |
| 524 | return -EINVAL; |
| 525 | |
| 526 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 527 | if (intf->seq_table[seq].inuse) { |
| 528 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; |
| 529 | |
| 530 | if ((msg->addr.channel == channel) |
| 531 | && (msg->msg.cmd == cmd) |
| 532 | && (msg->msg.netfn == netfn) |
| 533 | && (ipmi_addr_equal(addr, &(msg->addr)))) |
| 534 | { |
| 535 | *recv_msg = msg; |
| 536 | intf->seq_table[seq].inuse = 0; |
| 537 | rv = 0; |
| 538 | } |
| 539 | } |
| 540 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 541 | |
| 542 | return rv; |
| 543 | } |
| 544 | |
| 545 | |
| 546 | /* Start the timer for a specific sequence table entry. */ |
| 547 | static int intf_start_seq_timer(ipmi_smi_t intf, |
| 548 | long msgid) |
| 549 | { |
| 550 | int rv = -ENODEV; |
| 551 | unsigned long flags; |
| 552 | unsigned char seq; |
| 553 | unsigned long seqid; |
| 554 | |
| 555 | |
| 556 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); |
| 557 | |
| 558 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 559 | /* We do this verification because the user can be deleted |
| 560 | while a message is outstanding. */ |
| 561 | if ((intf->seq_table[seq].inuse) |
| 562 | && (intf->seq_table[seq].seqid == seqid)) |
| 563 | { |
| 564 | struct seq_table *ent = &(intf->seq_table[seq]); |
| 565 | ent->timeout = ent->orig_timeout; |
| 566 | rv = 0; |
| 567 | } |
| 568 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 569 | |
| 570 | return rv; |
| 571 | } |
| 572 | |
| 573 | /* Got an error for the send message for a specific sequence number. */ |
| 574 | static int intf_err_seq(ipmi_smi_t intf, |
| 575 | long msgid, |
| 576 | unsigned int err) |
| 577 | { |
| 578 | int rv = -ENODEV; |
| 579 | unsigned long flags; |
| 580 | unsigned char seq; |
| 581 | unsigned long seqid; |
| 582 | struct ipmi_recv_msg *msg = NULL; |
| 583 | |
| 584 | |
| 585 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); |
| 586 | |
| 587 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 588 | /* We do this verification because the user can be deleted |
| 589 | while a message is outstanding. */ |
| 590 | if ((intf->seq_table[seq].inuse) |
| 591 | && (intf->seq_table[seq].seqid == seqid)) |
| 592 | { |
| 593 | struct seq_table *ent = &(intf->seq_table[seq]); |
| 594 | |
| 595 | ent->inuse = 0; |
| 596 | msg = ent->recv_msg; |
| 597 | rv = 0; |
| 598 | } |
| 599 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 600 | |
| 601 | if (msg) { |
| 602 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
| 603 | msg->msg_data[0] = err; |
| 604 | msg->msg.netfn |= 1; /* Convert to a response. */ |
| 605 | msg->msg.data_len = 1; |
| 606 | msg->msg.data = msg->msg_data; |
| 607 | deliver_response(msg); |
| 608 | } |
| 609 | |
| 610 | return rv; |
| 611 | } |
| 612 | |
| 613 | |
| 614 | int ipmi_create_user(unsigned int if_num, |
| 615 | struct ipmi_user_hndl *handler, |
| 616 | void *handler_data, |
| 617 | ipmi_user_t *user) |
| 618 | { |
| 619 | unsigned long flags; |
| 620 | ipmi_user_t new_user; |
| 621 | int rv = 0; |
| 622 | ipmi_smi_t intf; |
| 623 | |
| 624 | /* There is no module usecount here, because it's not |
| 625 | required. Since this can only be used by and called from |
| 626 | other modules, they will implicitly use this module, and |
| 627 | thus this can't be removed unless the other modules are |
| 628 | removed. */ |
| 629 | |
| 630 | if (handler == NULL) |
| 631 | return -EINVAL; |
| 632 | |
| 633 | /* Make sure the driver is actually initialized, this handles |
| 634 | problems with initialization order. */ |
| 635 | if (!initialized) { |
| 636 | rv = ipmi_init_msghandler(); |
| 637 | if (rv) |
| 638 | return rv; |
| 639 | |
| 640 | /* The init code doesn't return an error if it was turned |
| 641 | off, but it won't initialize. Check that. */ |
| 642 | if (!initialized) |
| 643 | return -ENODEV; |
| 644 | } |
| 645 | |
| 646 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); |
| 647 | if (! new_user) |
| 648 | return -ENOMEM; |
| 649 | |
| 650 | down_read(&interfaces_sem); |
Zaur Kambarov | 3a84509 | 2005-06-21 17:14:30 -0700 | [diff] [blame] | 651 | if ((if_num >= MAX_IPMI_INTERFACES) || ipmi_interfaces[if_num] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | { |
| 653 | rv = -EINVAL; |
| 654 | goto out_unlock; |
| 655 | } |
| 656 | |
| 657 | intf = ipmi_interfaces[if_num]; |
| 658 | |
| 659 | new_user->handler = handler; |
| 660 | new_user->handler_data = handler_data; |
| 661 | new_user->intf = intf; |
| 662 | new_user->gets_events = 0; |
| 663 | |
| 664 | if (!try_module_get(intf->handlers->owner)) { |
| 665 | rv = -ENODEV; |
| 666 | goto out_unlock; |
| 667 | } |
| 668 | |
| 669 | if (intf->handlers->inc_usecount) { |
| 670 | rv = intf->handlers->inc_usecount(intf->send_info); |
| 671 | if (rv) { |
| 672 | module_put(intf->handlers->owner); |
| 673 | goto out_unlock; |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | write_lock_irqsave(&intf->users_lock, flags); |
| 678 | list_add_tail(&new_user->link, &intf->users); |
| 679 | write_unlock_irqrestore(&intf->users_lock, flags); |
| 680 | |
| 681 | out_unlock: |
| 682 | if (rv) { |
| 683 | kfree(new_user); |
| 684 | } else { |
| 685 | *user = new_user; |
| 686 | } |
| 687 | |
| 688 | up_read(&interfaces_sem); |
| 689 | return rv; |
| 690 | } |
| 691 | |
| 692 | static int ipmi_destroy_user_nolock(ipmi_user_t user) |
| 693 | { |
| 694 | int rv = -ENODEV; |
| 695 | ipmi_user_t t_user; |
| 696 | struct cmd_rcvr *rcvr, *rcvr2; |
| 697 | int i; |
| 698 | unsigned long flags; |
| 699 | |
| 700 | /* Find the user and delete them from the list. */ |
| 701 | list_for_each_entry(t_user, &(user->intf->users), link) { |
| 702 | if (t_user == user) { |
| 703 | list_del(&t_user->link); |
| 704 | rv = 0; |
| 705 | break; |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | if (rv) { |
| 710 | goto out_unlock; |
| 711 | } |
| 712 | |
| 713 | /* Remove the user from the interfaces sequence table. */ |
| 714 | spin_lock_irqsave(&(user->intf->seq_lock), flags); |
| 715 | for (i=0; i<IPMI_IPMB_NUM_SEQ; i++) { |
| 716 | if (user->intf->seq_table[i].inuse |
| 717 | && (user->intf->seq_table[i].recv_msg->user == user)) |
| 718 | { |
| 719 | user->intf->seq_table[i].inuse = 0; |
| 720 | } |
| 721 | } |
| 722 | spin_unlock_irqrestore(&(user->intf->seq_lock), flags); |
| 723 | |
| 724 | /* Remove the user from the command receiver's table. */ |
| 725 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); |
| 726 | list_for_each_entry_safe(rcvr, rcvr2, &(user->intf->cmd_rcvrs), link) { |
| 727 | if (rcvr->user == user) { |
| 728 | list_del(&rcvr->link); |
| 729 | kfree(rcvr); |
| 730 | } |
| 731 | } |
| 732 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); |
| 733 | |
| 734 | kfree(user); |
| 735 | |
| 736 | out_unlock: |
| 737 | |
| 738 | return rv; |
| 739 | } |
| 740 | |
| 741 | int ipmi_destroy_user(ipmi_user_t user) |
| 742 | { |
| 743 | int rv; |
| 744 | ipmi_smi_t intf = user->intf; |
| 745 | unsigned long flags; |
| 746 | |
| 747 | down_read(&interfaces_sem); |
| 748 | write_lock_irqsave(&intf->users_lock, flags); |
| 749 | rv = ipmi_destroy_user_nolock(user); |
| 750 | if (!rv) { |
| 751 | module_put(intf->handlers->owner); |
| 752 | if (intf->handlers->dec_usecount) |
| 753 | intf->handlers->dec_usecount(intf->send_info); |
| 754 | } |
| 755 | |
| 756 | write_unlock_irqrestore(&intf->users_lock, flags); |
| 757 | up_read(&interfaces_sem); |
| 758 | return rv; |
| 759 | } |
| 760 | |
| 761 | void ipmi_get_version(ipmi_user_t user, |
| 762 | unsigned char *major, |
| 763 | unsigned char *minor) |
| 764 | { |
| 765 | *major = user->intf->version_major; |
| 766 | *minor = user->intf->version_minor; |
| 767 | } |
| 768 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 769 | int ipmi_set_my_address(ipmi_user_t user, |
| 770 | unsigned int channel, |
| 771 | unsigned char address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 773 | if (channel >= IPMI_MAX_CHANNELS) |
| 774 | return -EINVAL; |
| 775 | user->intf->channels[channel].address = address; |
| 776 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 779 | int ipmi_get_my_address(ipmi_user_t user, |
| 780 | unsigned int channel, |
| 781 | unsigned char *address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 783 | if (channel >= IPMI_MAX_CHANNELS) |
| 784 | return -EINVAL; |
| 785 | *address = user->intf->channels[channel].address; |
| 786 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 789 | int ipmi_set_my_LUN(ipmi_user_t user, |
| 790 | unsigned int channel, |
| 791 | unsigned char LUN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 793 | if (channel >= IPMI_MAX_CHANNELS) |
| 794 | return -EINVAL; |
| 795 | user->intf->channels[channel].lun = LUN & 0x3; |
| 796 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | } |
| 798 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 799 | int ipmi_get_my_LUN(ipmi_user_t user, |
| 800 | unsigned int channel, |
| 801 | unsigned char *address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 803 | if (channel >= IPMI_MAX_CHANNELS) |
| 804 | return -EINVAL; |
| 805 | *address = user->intf->channels[channel].lun; |
| 806 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | int ipmi_set_gets_events(ipmi_user_t user, int val) |
| 810 | { |
| 811 | unsigned long flags; |
| 812 | struct ipmi_recv_msg *msg, *msg2; |
| 813 | |
| 814 | read_lock(&(user->intf->users_lock)); |
| 815 | spin_lock_irqsave(&(user->intf->events_lock), flags); |
| 816 | user->gets_events = val; |
| 817 | |
| 818 | if (val) { |
| 819 | /* Deliver any queued events. */ |
| 820 | list_for_each_entry_safe(msg, msg2, &(user->intf->waiting_events), link) { |
| 821 | list_del(&msg->link); |
| 822 | msg->user = user; |
| 823 | deliver_response(msg); |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | spin_unlock_irqrestore(&(user->intf->events_lock), flags); |
| 828 | read_unlock(&(user->intf->users_lock)); |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | int ipmi_register_for_cmd(ipmi_user_t user, |
| 834 | unsigned char netfn, |
| 835 | unsigned char cmd) |
| 836 | { |
| 837 | struct cmd_rcvr *cmp; |
| 838 | unsigned long flags; |
| 839 | struct cmd_rcvr *rcvr; |
| 840 | int rv = 0; |
| 841 | |
| 842 | |
| 843 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); |
| 844 | if (! rcvr) |
| 845 | return -ENOMEM; |
| 846 | |
| 847 | read_lock(&(user->intf->users_lock)); |
| 848 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); |
| 849 | if (user->intf->all_cmd_rcvr != NULL) { |
| 850 | rv = -EBUSY; |
| 851 | goto out_unlock; |
| 852 | } |
| 853 | |
| 854 | /* Make sure the command/netfn is not already registered. */ |
| 855 | list_for_each_entry(cmp, &(user->intf->cmd_rcvrs), link) { |
| 856 | if ((cmp->netfn == netfn) && (cmp->cmd == cmd)) { |
| 857 | rv = -EBUSY; |
| 858 | break; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | if (! rv) { |
| 863 | rcvr->cmd = cmd; |
| 864 | rcvr->netfn = netfn; |
| 865 | rcvr->user = user; |
| 866 | list_add_tail(&(rcvr->link), &(user->intf->cmd_rcvrs)); |
| 867 | } |
| 868 | out_unlock: |
| 869 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); |
| 870 | read_unlock(&(user->intf->users_lock)); |
| 871 | |
| 872 | if (rv) |
| 873 | kfree(rcvr); |
| 874 | |
| 875 | return rv; |
| 876 | } |
| 877 | |
| 878 | int ipmi_unregister_for_cmd(ipmi_user_t user, |
| 879 | unsigned char netfn, |
| 880 | unsigned char cmd) |
| 881 | { |
| 882 | unsigned long flags; |
| 883 | struct cmd_rcvr *rcvr; |
| 884 | int rv = -ENOENT; |
| 885 | |
| 886 | read_lock(&(user->intf->users_lock)); |
| 887 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); |
| 888 | /* Make sure the command/netfn is not already registered. */ |
| 889 | list_for_each_entry(rcvr, &(user->intf->cmd_rcvrs), link) { |
| 890 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { |
| 891 | rv = 0; |
| 892 | list_del(&rcvr->link); |
| 893 | kfree(rcvr); |
| 894 | break; |
| 895 | } |
| 896 | } |
| 897 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); |
| 898 | read_unlock(&(user->intf->users_lock)); |
| 899 | |
| 900 | return rv; |
| 901 | } |
| 902 | |
| 903 | void ipmi_user_set_run_to_completion(ipmi_user_t user, int val) |
| 904 | { |
| 905 | user->intf->handlers->set_run_to_completion(user->intf->send_info, |
| 906 | val); |
| 907 | } |
| 908 | |
| 909 | static unsigned char |
| 910 | ipmb_checksum(unsigned char *data, int size) |
| 911 | { |
| 912 | unsigned char csum = 0; |
| 913 | |
| 914 | for (; size > 0; size--, data++) |
| 915 | csum += *data; |
| 916 | |
| 917 | return -csum; |
| 918 | } |
| 919 | |
| 920 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, |
| 921 | struct kernel_ipmi_msg *msg, |
| 922 | struct ipmi_ipmb_addr *ipmb_addr, |
| 923 | long msgid, |
| 924 | unsigned char ipmb_seq, |
| 925 | int broadcast, |
| 926 | unsigned char source_address, |
| 927 | unsigned char source_lun) |
| 928 | { |
| 929 | int i = broadcast; |
| 930 | |
| 931 | /* Format the IPMB header data. */ |
| 932 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
| 933 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; |
| 934 | smi_msg->data[2] = ipmb_addr->channel; |
| 935 | if (broadcast) |
| 936 | smi_msg->data[3] = 0; |
| 937 | smi_msg->data[i+3] = ipmb_addr->slave_addr; |
| 938 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); |
| 939 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); |
| 940 | smi_msg->data[i+6] = source_address; |
| 941 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; |
| 942 | smi_msg->data[i+8] = msg->cmd; |
| 943 | |
| 944 | /* Now tack on the data to the message. */ |
| 945 | if (msg->data_len > 0) |
| 946 | memcpy(&(smi_msg->data[i+9]), msg->data, |
| 947 | msg->data_len); |
| 948 | smi_msg->data_size = msg->data_len + 9; |
| 949 | |
| 950 | /* Now calculate the checksum and tack it on. */ |
| 951 | smi_msg->data[i+smi_msg->data_size] |
| 952 | = ipmb_checksum(&(smi_msg->data[i+6]), |
| 953 | smi_msg->data_size-6); |
| 954 | |
| 955 | /* Add on the checksum size and the offset from the |
| 956 | broadcast. */ |
| 957 | smi_msg->data_size += 1 + i; |
| 958 | |
| 959 | smi_msg->msgid = msgid; |
| 960 | } |
| 961 | |
| 962 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, |
| 963 | struct kernel_ipmi_msg *msg, |
| 964 | struct ipmi_lan_addr *lan_addr, |
| 965 | long msgid, |
| 966 | unsigned char ipmb_seq, |
| 967 | unsigned char source_lun) |
| 968 | { |
| 969 | /* Format the IPMB header data. */ |
| 970 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
| 971 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; |
| 972 | smi_msg->data[2] = lan_addr->channel; |
| 973 | smi_msg->data[3] = lan_addr->session_handle; |
| 974 | smi_msg->data[4] = lan_addr->remote_SWID; |
| 975 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); |
| 976 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); |
| 977 | smi_msg->data[7] = lan_addr->local_SWID; |
| 978 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; |
| 979 | smi_msg->data[9] = msg->cmd; |
| 980 | |
| 981 | /* Now tack on the data to the message. */ |
| 982 | if (msg->data_len > 0) |
| 983 | memcpy(&(smi_msg->data[10]), msg->data, |
| 984 | msg->data_len); |
| 985 | smi_msg->data_size = msg->data_len + 10; |
| 986 | |
| 987 | /* Now calculate the checksum and tack it on. */ |
| 988 | smi_msg->data[smi_msg->data_size] |
| 989 | = ipmb_checksum(&(smi_msg->data[7]), |
| 990 | smi_msg->data_size-7); |
| 991 | |
| 992 | /* Add on the checksum size and the offset from the |
| 993 | broadcast. */ |
| 994 | smi_msg->data_size += 1; |
| 995 | |
| 996 | smi_msg->msgid = msgid; |
| 997 | } |
| 998 | |
| 999 | /* Separate from ipmi_request so that the user does not have to be |
| 1000 | supplied in certain circumstances (mainly at panic time). If |
| 1001 | messages are supplied, they will be freed, even if an error |
| 1002 | occurs. */ |
| 1003 | static inline int i_ipmi_request(ipmi_user_t user, |
| 1004 | ipmi_smi_t intf, |
| 1005 | struct ipmi_addr *addr, |
| 1006 | long msgid, |
| 1007 | struct kernel_ipmi_msg *msg, |
| 1008 | void *user_msg_data, |
| 1009 | void *supplied_smi, |
| 1010 | struct ipmi_recv_msg *supplied_recv, |
| 1011 | int priority, |
| 1012 | unsigned char source_address, |
| 1013 | unsigned char source_lun, |
| 1014 | int retries, |
| 1015 | unsigned int retry_time_ms) |
| 1016 | { |
| 1017 | int rv = 0; |
| 1018 | struct ipmi_smi_msg *smi_msg; |
| 1019 | struct ipmi_recv_msg *recv_msg; |
| 1020 | unsigned long flags; |
| 1021 | |
| 1022 | |
| 1023 | if (supplied_recv) { |
| 1024 | recv_msg = supplied_recv; |
| 1025 | } else { |
| 1026 | recv_msg = ipmi_alloc_recv_msg(); |
| 1027 | if (recv_msg == NULL) { |
| 1028 | return -ENOMEM; |
| 1029 | } |
| 1030 | } |
| 1031 | recv_msg->user_msg_data = user_msg_data; |
| 1032 | |
| 1033 | if (supplied_smi) { |
| 1034 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
| 1035 | } else { |
| 1036 | smi_msg = ipmi_alloc_smi_msg(); |
| 1037 | if (smi_msg == NULL) { |
| 1038 | ipmi_free_recv_msg(recv_msg); |
| 1039 | return -ENOMEM; |
| 1040 | } |
| 1041 | } |
| 1042 | |
| 1043 | recv_msg->user = user; |
| 1044 | recv_msg->msgid = msgid; |
| 1045 | /* Store the message to send in the receive message so timeout |
| 1046 | responses can get the proper response data. */ |
| 1047 | recv_msg->msg = *msg; |
| 1048 | |
| 1049 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { |
| 1050 | struct ipmi_system_interface_addr *smi_addr; |
| 1051 | |
| 1052 | if (msg->netfn & 1) { |
| 1053 | /* Responses are not allowed to the SMI. */ |
| 1054 | rv = -EINVAL; |
| 1055 | goto out_err; |
| 1056 | } |
| 1057 | |
| 1058 | smi_addr = (struct ipmi_system_interface_addr *) addr; |
| 1059 | if (smi_addr->lun > 3) { |
| 1060 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1061 | intf->sent_invalid_commands++; |
| 1062 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1063 | rv = -EINVAL; |
| 1064 | goto out_err; |
| 1065 | } |
| 1066 | |
| 1067 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); |
| 1068 | |
| 1069 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) |
| 1070 | && ((msg->cmd == IPMI_SEND_MSG_CMD) |
| 1071 | || (msg->cmd == IPMI_GET_MSG_CMD) |
| 1072 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) |
| 1073 | { |
| 1074 | /* We don't let the user do these, since we manage |
| 1075 | the sequence numbers. */ |
| 1076 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1077 | intf->sent_invalid_commands++; |
| 1078 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1079 | rv = -EINVAL; |
| 1080 | goto out_err; |
| 1081 | } |
| 1082 | |
| 1083 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
| 1084 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1085 | intf->sent_invalid_commands++; |
| 1086 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1087 | rv = -EMSGSIZE; |
| 1088 | goto out_err; |
| 1089 | } |
| 1090 | |
| 1091 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); |
| 1092 | smi_msg->data[1] = msg->cmd; |
| 1093 | smi_msg->msgid = msgid; |
| 1094 | smi_msg->user_data = recv_msg; |
| 1095 | if (msg->data_len > 0) |
| 1096 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); |
| 1097 | smi_msg->data_size = msg->data_len + 2; |
| 1098 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1099 | intf->sent_local_commands++; |
| 1100 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1101 | } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) |
| 1102 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
| 1103 | { |
| 1104 | struct ipmi_ipmb_addr *ipmb_addr; |
| 1105 | unsigned char ipmb_seq; |
| 1106 | long seqid; |
| 1107 | int broadcast = 0; |
| 1108 | |
KAMBAROV, ZAUR | 9c101fd | 2005-06-28 20:45:08 -0700 | [diff] [blame] | 1109 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
| 1110 | spin_lock_irqsave(&intf->counter_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | intf->sent_invalid_commands++; |
| 1112 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1113 | rv = -EINVAL; |
| 1114 | goto out_err; |
| 1115 | } |
| 1116 | |
| 1117 | if (intf->channels[addr->channel].medium |
| 1118 | != IPMI_CHANNEL_MEDIUM_IPMB) |
| 1119 | { |
| 1120 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1121 | intf->sent_invalid_commands++; |
| 1122 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1123 | rv = -EINVAL; |
| 1124 | goto out_err; |
| 1125 | } |
| 1126 | |
| 1127 | if (retries < 0) { |
| 1128 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) |
| 1129 | retries = 0; /* Don't retry broadcasts. */ |
| 1130 | else |
| 1131 | retries = 4; |
| 1132 | } |
| 1133 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { |
| 1134 | /* Broadcasts add a zero at the beginning of the |
| 1135 | message, but otherwise is the same as an IPMB |
| 1136 | address. */ |
| 1137 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
| 1138 | broadcast = 1; |
| 1139 | } |
| 1140 | |
| 1141 | |
| 1142 | /* Default to 1 second retries. */ |
| 1143 | if (retry_time_ms == 0) |
| 1144 | retry_time_ms = 1000; |
| 1145 | |
| 1146 | /* 9 for the header and 1 for the checksum, plus |
| 1147 | possibly one for the broadcast. */ |
| 1148 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
| 1149 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1150 | intf->sent_invalid_commands++; |
| 1151 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1152 | rv = -EMSGSIZE; |
| 1153 | goto out_err; |
| 1154 | } |
| 1155 | |
| 1156 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; |
| 1157 | if (ipmb_addr->lun > 3) { |
| 1158 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1159 | intf->sent_invalid_commands++; |
| 1160 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1161 | rv = -EINVAL; |
| 1162 | goto out_err; |
| 1163 | } |
| 1164 | |
| 1165 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); |
| 1166 | |
| 1167 | if (recv_msg->msg.netfn & 0x1) { |
| 1168 | /* It's a response, so use the user's sequence |
| 1169 | from msgid. */ |
| 1170 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1171 | intf->sent_ipmb_responses++; |
| 1172 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1173 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
| 1174 | msgid, broadcast, |
| 1175 | source_address, source_lun); |
| 1176 | |
| 1177 | /* Save the receive message so we can use it |
| 1178 | to deliver the response. */ |
| 1179 | smi_msg->user_data = recv_msg; |
| 1180 | } else { |
| 1181 | /* It's a command, so get a sequence for it. */ |
| 1182 | |
| 1183 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 1184 | |
| 1185 | spin_lock(&intf->counter_lock); |
| 1186 | intf->sent_ipmb_commands++; |
| 1187 | spin_unlock(&intf->counter_lock); |
| 1188 | |
| 1189 | /* Create a sequence number with a 1 second |
| 1190 | timeout and 4 retries. */ |
| 1191 | rv = intf_next_seq(intf, |
| 1192 | recv_msg, |
| 1193 | retry_time_ms, |
| 1194 | retries, |
| 1195 | broadcast, |
| 1196 | &ipmb_seq, |
| 1197 | &seqid); |
| 1198 | if (rv) { |
| 1199 | /* We have used up all the sequence numbers, |
| 1200 | probably, so abort. */ |
| 1201 | spin_unlock_irqrestore(&(intf->seq_lock), |
| 1202 | flags); |
| 1203 | goto out_err; |
| 1204 | } |
| 1205 | |
| 1206 | /* Store the sequence number in the message, |
| 1207 | so that when the send message response |
| 1208 | comes back we can start the timer. */ |
| 1209 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
| 1210 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), |
| 1211 | ipmb_seq, broadcast, |
| 1212 | source_address, source_lun); |
| 1213 | |
| 1214 | /* Copy the message into the recv message data, so we |
| 1215 | can retransmit it later if necessary. */ |
| 1216 | memcpy(recv_msg->msg_data, smi_msg->data, |
| 1217 | smi_msg->data_size); |
| 1218 | recv_msg->msg.data = recv_msg->msg_data; |
| 1219 | recv_msg->msg.data_len = smi_msg->data_size; |
| 1220 | |
| 1221 | /* We don't unlock until here, because we need |
| 1222 | to copy the completed message into the |
| 1223 | recv_msg before we release the lock. |
| 1224 | Otherwise, race conditions may bite us. I |
| 1225 | know that's pretty paranoid, but I prefer |
| 1226 | to be correct. */ |
| 1227 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 1228 | } |
| 1229 | } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { |
| 1230 | struct ipmi_lan_addr *lan_addr; |
| 1231 | unsigned char ipmb_seq; |
| 1232 | long seqid; |
| 1233 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1234 | if (addr->channel >= IPMI_NUM_CHANNELS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1236 | intf->sent_invalid_commands++; |
| 1237 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1238 | rv = -EINVAL; |
| 1239 | goto out_err; |
| 1240 | } |
| 1241 | |
| 1242 | if ((intf->channels[addr->channel].medium |
| 1243 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
| 1244 | && (intf->channels[addr->channel].medium |
| 1245 | != IPMI_CHANNEL_MEDIUM_ASYNC)) |
| 1246 | { |
| 1247 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1248 | intf->sent_invalid_commands++; |
| 1249 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1250 | rv = -EINVAL; |
| 1251 | goto out_err; |
| 1252 | } |
| 1253 | |
| 1254 | retries = 4; |
| 1255 | |
| 1256 | /* Default to 1 second retries. */ |
| 1257 | if (retry_time_ms == 0) |
| 1258 | retry_time_ms = 1000; |
| 1259 | |
| 1260 | /* 11 for the header and 1 for the checksum. */ |
| 1261 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { |
| 1262 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1263 | intf->sent_invalid_commands++; |
| 1264 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1265 | rv = -EMSGSIZE; |
| 1266 | goto out_err; |
| 1267 | } |
| 1268 | |
| 1269 | lan_addr = (struct ipmi_lan_addr *) addr; |
| 1270 | if (lan_addr->lun > 3) { |
| 1271 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1272 | intf->sent_invalid_commands++; |
| 1273 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1274 | rv = -EINVAL; |
| 1275 | goto out_err; |
| 1276 | } |
| 1277 | |
| 1278 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); |
| 1279 | |
| 1280 | if (recv_msg->msg.netfn & 0x1) { |
| 1281 | /* It's a response, so use the user's sequence |
| 1282 | from msgid. */ |
| 1283 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1284 | intf->sent_lan_responses++; |
| 1285 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1286 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
| 1287 | msgid, source_lun); |
| 1288 | |
| 1289 | /* Save the receive message so we can use it |
| 1290 | to deliver the response. */ |
| 1291 | smi_msg->user_data = recv_msg; |
| 1292 | } else { |
| 1293 | /* It's a command, so get a sequence for it. */ |
| 1294 | |
| 1295 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 1296 | |
| 1297 | spin_lock(&intf->counter_lock); |
| 1298 | intf->sent_lan_commands++; |
| 1299 | spin_unlock(&intf->counter_lock); |
| 1300 | |
| 1301 | /* Create a sequence number with a 1 second |
| 1302 | timeout and 4 retries. */ |
| 1303 | rv = intf_next_seq(intf, |
| 1304 | recv_msg, |
| 1305 | retry_time_ms, |
| 1306 | retries, |
| 1307 | 0, |
| 1308 | &ipmb_seq, |
| 1309 | &seqid); |
| 1310 | if (rv) { |
| 1311 | /* We have used up all the sequence numbers, |
| 1312 | probably, so abort. */ |
| 1313 | spin_unlock_irqrestore(&(intf->seq_lock), |
| 1314 | flags); |
| 1315 | goto out_err; |
| 1316 | } |
| 1317 | |
| 1318 | /* Store the sequence number in the message, |
| 1319 | so that when the send message response |
| 1320 | comes back we can start the timer. */ |
| 1321 | format_lan_msg(smi_msg, msg, lan_addr, |
| 1322 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), |
| 1323 | ipmb_seq, source_lun); |
| 1324 | |
| 1325 | /* Copy the message into the recv message data, so we |
| 1326 | can retransmit it later if necessary. */ |
| 1327 | memcpy(recv_msg->msg_data, smi_msg->data, |
| 1328 | smi_msg->data_size); |
| 1329 | recv_msg->msg.data = recv_msg->msg_data; |
| 1330 | recv_msg->msg.data_len = smi_msg->data_size; |
| 1331 | |
| 1332 | /* We don't unlock until here, because we need |
| 1333 | to copy the completed message into the |
| 1334 | recv_msg before we release the lock. |
| 1335 | Otherwise, race conditions may bite us. I |
| 1336 | know that's pretty paranoid, but I prefer |
| 1337 | to be correct. */ |
| 1338 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 1339 | } |
| 1340 | } else { |
| 1341 | /* Unknown address type. */ |
| 1342 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1343 | intf->sent_invalid_commands++; |
| 1344 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1345 | rv = -EINVAL; |
| 1346 | goto out_err; |
| 1347 | } |
| 1348 | |
| 1349 | #ifdef DEBUG_MSGING |
| 1350 | { |
| 1351 | int m; |
| 1352 | for (m=0; m<smi_msg->data_size; m++) |
| 1353 | printk(" %2.2x", smi_msg->data[m]); |
| 1354 | printk("\n"); |
| 1355 | } |
| 1356 | #endif |
| 1357 | intf->handlers->sender(intf->send_info, smi_msg, priority); |
| 1358 | |
| 1359 | return 0; |
| 1360 | |
| 1361 | out_err: |
| 1362 | ipmi_free_smi_msg(smi_msg); |
| 1363 | ipmi_free_recv_msg(recv_msg); |
| 1364 | return rv; |
| 1365 | } |
| 1366 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1367 | static int check_addr(ipmi_smi_t intf, |
| 1368 | struct ipmi_addr *addr, |
| 1369 | unsigned char *saddr, |
| 1370 | unsigned char *lun) |
| 1371 | { |
| 1372 | if (addr->channel >= IPMI_MAX_CHANNELS) |
| 1373 | return -EINVAL; |
| 1374 | *lun = intf->channels[addr->channel].lun; |
| 1375 | *saddr = intf->channels[addr->channel].address; |
| 1376 | return 0; |
| 1377 | } |
| 1378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | int ipmi_request_settime(ipmi_user_t user, |
| 1380 | struct ipmi_addr *addr, |
| 1381 | long msgid, |
| 1382 | struct kernel_ipmi_msg *msg, |
| 1383 | void *user_msg_data, |
| 1384 | int priority, |
| 1385 | int retries, |
| 1386 | unsigned int retry_time_ms) |
| 1387 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1388 | unsigned char saddr, lun; |
| 1389 | int rv; |
| 1390 | |
| 1391 | rv = check_addr(user->intf, addr, &saddr, &lun); |
| 1392 | if (rv) |
| 1393 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | return i_ipmi_request(user, |
| 1395 | user->intf, |
| 1396 | addr, |
| 1397 | msgid, |
| 1398 | msg, |
| 1399 | user_msg_data, |
| 1400 | NULL, NULL, |
| 1401 | priority, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1402 | saddr, |
| 1403 | lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | retries, |
| 1405 | retry_time_ms); |
| 1406 | } |
| 1407 | |
| 1408 | int ipmi_request_supply_msgs(ipmi_user_t user, |
| 1409 | struct ipmi_addr *addr, |
| 1410 | long msgid, |
| 1411 | struct kernel_ipmi_msg *msg, |
| 1412 | void *user_msg_data, |
| 1413 | void *supplied_smi, |
| 1414 | struct ipmi_recv_msg *supplied_recv, |
| 1415 | int priority) |
| 1416 | { |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1417 | unsigned char saddr, lun; |
| 1418 | int rv; |
| 1419 | |
| 1420 | rv = check_addr(user->intf, addr, &saddr, &lun); |
| 1421 | if (rv) |
| 1422 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | return i_ipmi_request(user, |
| 1424 | user->intf, |
| 1425 | addr, |
| 1426 | msgid, |
| 1427 | msg, |
| 1428 | user_msg_data, |
| 1429 | supplied_smi, |
| 1430 | supplied_recv, |
| 1431 | priority, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1432 | saddr, |
| 1433 | lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | -1, 0); |
| 1435 | } |
| 1436 | |
| 1437 | static int ipmb_file_read_proc(char *page, char **start, off_t off, |
| 1438 | int count, int *eof, void *data) |
| 1439 | { |
| 1440 | char *out = (char *) page; |
| 1441 | ipmi_smi_t intf = data; |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1442 | int i; |
| 1443 | int rv= 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1445 | for (i=0; i<IPMI_MAX_CHANNELS; i++) |
| 1446 | rv += sprintf(out+rv, "%x ", intf->channels[i].address); |
| 1447 | out[rv-1] = '\n'; /* Replace the final space with a newline */ |
| 1448 | out[rv] = '\0'; |
| 1449 | rv++; |
| 1450 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | } |
| 1452 | |
| 1453 | static int version_file_read_proc(char *page, char **start, off_t off, |
| 1454 | int count, int *eof, void *data) |
| 1455 | { |
| 1456 | char *out = (char *) page; |
| 1457 | ipmi_smi_t intf = data; |
| 1458 | |
| 1459 | return sprintf(out, "%d.%d\n", |
| 1460 | intf->version_major, intf->version_minor); |
| 1461 | } |
| 1462 | |
| 1463 | static int stat_file_read_proc(char *page, char **start, off_t off, |
| 1464 | int count, int *eof, void *data) |
| 1465 | { |
| 1466 | char *out = (char *) page; |
| 1467 | ipmi_smi_t intf = data; |
| 1468 | |
| 1469 | out += sprintf(out, "sent_invalid_commands: %d\n", |
| 1470 | intf->sent_invalid_commands); |
| 1471 | out += sprintf(out, "sent_local_commands: %d\n", |
| 1472 | intf->sent_local_commands); |
| 1473 | out += sprintf(out, "handled_local_responses: %d\n", |
| 1474 | intf->handled_local_responses); |
| 1475 | out += sprintf(out, "unhandled_local_responses: %d\n", |
| 1476 | intf->unhandled_local_responses); |
| 1477 | out += sprintf(out, "sent_ipmb_commands: %d\n", |
| 1478 | intf->sent_ipmb_commands); |
| 1479 | out += sprintf(out, "sent_ipmb_command_errs: %d\n", |
| 1480 | intf->sent_ipmb_command_errs); |
| 1481 | out += sprintf(out, "retransmitted_ipmb_commands: %d\n", |
| 1482 | intf->retransmitted_ipmb_commands); |
| 1483 | out += sprintf(out, "timed_out_ipmb_commands: %d\n", |
| 1484 | intf->timed_out_ipmb_commands); |
| 1485 | out += sprintf(out, "timed_out_ipmb_broadcasts: %d\n", |
| 1486 | intf->timed_out_ipmb_broadcasts); |
| 1487 | out += sprintf(out, "sent_ipmb_responses: %d\n", |
| 1488 | intf->sent_ipmb_responses); |
| 1489 | out += sprintf(out, "handled_ipmb_responses: %d\n", |
| 1490 | intf->handled_ipmb_responses); |
| 1491 | out += sprintf(out, "invalid_ipmb_responses: %d\n", |
| 1492 | intf->invalid_ipmb_responses); |
| 1493 | out += sprintf(out, "unhandled_ipmb_responses: %d\n", |
| 1494 | intf->unhandled_ipmb_responses); |
| 1495 | out += sprintf(out, "sent_lan_commands: %d\n", |
| 1496 | intf->sent_lan_commands); |
| 1497 | out += sprintf(out, "sent_lan_command_errs: %d\n", |
| 1498 | intf->sent_lan_command_errs); |
| 1499 | out += sprintf(out, "retransmitted_lan_commands: %d\n", |
| 1500 | intf->retransmitted_lan_commands); |
| 1501 | out += sprintf(out, "timed_out_lan_commands: %d\n", |
| 1502 | intf->timed_out_lan_commands); |
| 1503 | out += sprintf(out, "sent_lan_responses: %d\n", |
| 1504 | intf->sent_lan_responses); |
| 1505 | out += sprintf(out, "handled_lan_responses: %d\n", |
| 1506 | intf->handled_lan_responses); |
| 1507 | out += sprintf(out, "invalid_lan_responses: %d\n", |
| 1508 | intf->invalid_lan_responses); |
| 1509 | out += sprintf(out, "unhandled_lan_responses: %d\n", |
| 1510 | intf->unhandled_lan_responses); |
| 1511 | out += sprintf(out, "handled_commands: %d\n", |
| 1512 | intf->handled_commands); |
| 1513 | out += sprintf(out, "invalid_commands: %d\n", |
| 1514 | intf->invalid_commands); |
| 1515 | out += sprintf(out, "unhandled_commands: %d\n", |
| 1516 | intf->unhandled_commands); |
| 1517 | out += sprintf(out, "invalid_events: %d\n", |
| 1518 | intf->invalid_events); |
| 1519 | out += sprintf(out, "events: %d\n", |
| 1520 | intf->events); |
| 1521 | |
| 1522 | return (out - ((char *) page)); |
| 1523 | } |
| 1524 | |
| 1525 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, |
| 1526 | read_proc_t *read_proc, write_proc_t *write_proc, |
| 1527 | void *data, struct module *owner) |
| 1528 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | int rv = 0; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1530 | #ifdef CONFIG_PROC_FS |
| 1531 | struct proc_dir_entry *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | struct ipmi_proc_entry *entry; |
| 1533 | |
| 1534 | /* Create a list element. */ |
| 1535 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
| 1536 | if (!entry) |
| 1537 | return -ENOMEM; |
| 1538 | entry->name = kmalloc(strlen(name)+1, GFP_KERNEL); |
| 1539 | if (!entry->name) { |
| 1540 | kfree(entry); |
| 1541 | return -ENOMEM; |
| 1542 | } |
| 1543 | strcpy(entry->name, name); |
| 1544 | |
| 1545 | file = create_proc_entry(name, 0, smi->proc_dir); |
| 1546 | if (!file) { |
| 1547 | kfree(entry->name); |
| 1548 | kfree(entry); |
| 1549 | rv = -ENOMEM; |
| 1550 | } else { |
| 1551 | file->nlink = 1; |
| 1552 | file->data = data; |
| 1553 | file->read_proc = read_proc; |
| 1554 | file->write_proc = write_proc; |
| 1555 | file->owner = owner; |
| 1556 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1557 | spin_lock(&smi->proc_entry_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | /* Stick it on the list. */ |
| 1559 | entry->next = smi->proc_entries; |
| 1560 | smi->proc_entries = entry; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1561 | spin_unlock(&smi->proc_entry_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | } |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1563 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
| 1565 | return rv; |
| 1566 | } |
| 1567 | |
| 1568 | static int add_proc_entries(ipmi_smi_t smi, int num) |
| 1569 | { |
| 1570 | int rv = 0; |
| 1571 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1572 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | sprintf(smi->proc_dir_name, "%d", num); |
| 1574 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); |
| 1575 | if (!smi->proc_dir) |
| 1576 | rv = -ENOMEM; |
| 1577 | else { |
| 1578 | smi->proc_dir->owner = THIS_MODULE; |
| 1579 | } |
| 1580 | |
| 1581 | if (rv == 0) |
| 1582 | rv = ipmi_smi_add_proc_entry(smi, "stats", |
| 1583 | stat_file_read_proc, NULL, |
| 1584 | smi, THIS_MODULE); |
| 1585 | |
| 1586 | if (rv == 0) |
| 1587 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", |
| 1588 | ipmb_file_read_proc, NULL, |
| 1589 | smi, THIS_MODULE); |
| 1590 | |
| 1591 | if (rv == 0) |
| 1592 | rv = ipmi_smi_add_proc_entry(smi, "version", |
| 1593 | version_file_read_proc, NULL, |
| 1594 | smi, THIS_MODULE); |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1595 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
| 1597 | return rv; |
| 1598 | } |
| 1599 | |
| 1600 | static void remove_proc_entries(ipmi_smi_t smi) |
| 1601 | { |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1602 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | struct ipmi_proc_entry *entry; |
| 1604 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1605 | spin_lock(&smi->proc_entry_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | while (smi->proc_entries) { |
| 1607 | entry = smi->proc_entries; |
| 1608 | smi->proc_entries = entry->next; |
| 1609 | |
| 1610 | remove_proc_entry(entry->name, smi->proc_dir); |
| 1611 | kfree(entry->name); |
| 1612 | kfree(entry); |
| 1613 | } |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1614 | spin_unlock(&smi->proc_entry_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1616 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | } |
| 1618 | |
| 1619 | static int |
| 1620 | send_channel_info_cmd(ipmi_smi_t intf, int chan) |
| 1621 | { |
| 1622 | struct kernel_ipmi_msg msg; |
| 1623 | unsigned char data[1]; |
| 1624 | struct ipmi_system_interface_addr si; |
| 1625 | |
| 1626 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 1627 | si.channel = IPMI_BMC_CHANNEL; |
| 1628 | si.lun = 0; |
| 1629 | |
| 1630 | msg.netfn = IPMI_NETFN_APP_REQUEST; |
| 1631 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; |
| 1632 | msg.data = data; |
| 1633 | msg.data_len = 1; |
| 1634 | data[0] = chan; |
| 1635 | return i_ipmi_request(NULL, |
| 1636 | intf, |
| 1637 | (struct ipmi_addr *) &si, |
| 1638 | 0, |
| 1639 | &msg, |
| 1640 | NULL, |
| 1641 | NULL, |
| 1642 | NULL, |
| 1643 | 0, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1644 | intf->channels[0].address, |
| 1645 | intf->channels[0].lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | -1, 0); |
| 1647 | } |
| 1648 | |
| 1649 | static void |
| 1650 | channel_handler(ipmi_smi_t intf, struct ipmi_smi_msg *msg) |
| 1651 | { |
| 1652 | int rv = 0; |
| 1653 | int chan; |
| 1654 | |
| 1655 | if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2)) |
| 1656 | && (msg->rsp[1] == IPMI_GET_CHANNEL_INFO_CMD)) |
| 1657 | { |
| 1658 | /* It's the one we want */ |
| 1659 | if (msg->rsp[2] != 0) { |
| 1660 | /* Got an error from the channel, just go on. */ |
| 1661 | |
| 1662 | if (msg->rsp[2] == IPMI_INVALID_COMMAND_ERR) { |
| 1663 | /* If the MC does not support this |
| 1664 | command, that is legal. We just |
| 1665 | assume it has one IPMB at channel |
| 1666 | zero. */ |
| 1667 | intf->channels[0].medium |
| 1668 | = IPMI_CHANNEL_MEDIUM_IPMB; |
| 1669 | intf->channels[0].protocol |
| 1670 | = IPMI_CHANNEL_PROTOCOL_IPMB; |
| 1671 | rv = -ENOSYS; |
| 1672 | |
| 1673 | intf->curr_channel = IPMI_MAX_CHANNELS; |
| 1674 | wake_up(&intf->waitq); |
| 1675 | goto out; |
| 1676 | } |
| 1677 | goto next_channel; |
| 1678 | } |
| 1679 | if (msg->rsp_size < 6) { |
| 1680 | /* Message not big enough, just go on. */ |
| 1681 | goto next_channel; |
| 1682 | } |
| 1683 | chan = intf->curr_channel; |
| 1684 | intf->channels[chan].medium = msg->rsp[4] & 0x7f; |
| 1685 | intf->channels[chan].protocol = msg->rsp[5] & 0x1f; |
| 1686 | |
| 1687 | next_channel: |
| 1688 | intf->curr_channel++; |
| 1689 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) |
| 1690 | wake_up(&intf->waitq); |
| 1691 | else |
| 1692 | rv = send_channel_info_cmd(intf, intf->curr_channel); |
| 1693 | |
| 1694 | if (rv) { |
| 1695 | /* Got an error somehow, just give up. */ |
| 1696 | intf->curr_channel = IPMI_MAX_CHANNELS; |
| 1697 | wake_up(&intf->waitq); |
| 1698 | |
| 1699 | printk(KERN_WARNING PFX |
| 1700 | "Error sending channel information: %d\n", |
| 1701 | rv); |
| 1702 | } |
| 1703 | } |
| 1704 | out: |
| 1705 | return; |
| 1706 | } |
| 1707 | |
| 1708 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, |
| 1709 | void *send_info, |
| 1710 | unsigned char version_major, |
| 1711 | unsigned char version_minor, |
| 1712 | unsigned char slave_addr, |
| 1713 | ipmi_smi_t *intf) |
| 1714 | { |
| 1715 | int i, j; |
| 1716 | int rv; |
| 1717 | ipmi_smi_t new_intf; |
| 1718 | unsigned long flags; |
| 1719 | |
| 1720 | |
| 1721 | /* Make sure the driver is actually initialized, this handles |
| 1722 | problems with initialization order. */ |
| 1723 | if (!initialized) { |
| 1724 | rv = ipmi_init_msghandler(); |
| 1725 | if (rv) |
| 1726 | return rv; |
| 1727 | /* The init code doesn't return an error if it was turned |
| 1728 | off, but it won't initialize. Check that. */ |
| 1729 | if (!initialized) |
| 1730 | return -ENODEV; |
| 1731 | } |
| 1732 | |
| 1733 | new_intf = kmalloc(sizeof(*new_intf), GFP_KERNEL); |
| 1734 | if (!new_intf) |
| 1735 | return -ENOMEM; |
| 1736 | memset(new_intf, 0, sizeof(*new_intf)); |
| 1737 | |
| 1738 | new_intf->proc_dir = NULL; |
| 1739 | |
| 1740 | rv = -ENOMEM; |
| 1741 | |
| 1742 | down_write(&interfaces_sem); |
| 1743 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 1744 | if (ipmi_interfaces[i] == NULL) { |
| 1745 | new_intf->intf_num = i; |
| 1746 | new_intf->version_major = version_major; |
| 1747 | new_intf->version_minor = version_minor; |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 1748 | for (j=0; j<IPMI_MAX_CHANNELS; j++) { |
| 1749 | new_intf->channels[j].address |
| 1750 | = IPMI_BMC_SLAVE_ADDR; |
| 1751 | new_intf->channels[j].lun = 2; |
| 1752 | } |
| 1753 | if (slave_addr != 0) |
| 1754 | new_intf->channels[0].address = slave_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | rwlock_init(&(new_intf->users_lock)); |
| 1756 | INIT_LIST_HEAD(&(new_intf->users)); |
| 1757 | new_intf->handlers = handlers; |
| 1758 | new_intf->send_info = send_info; |
| 1759 | spin_lock_init(&(new_intf->seq_lock)); |
| 1760 | for (j=0; j<IPMI_IPMB_NUM_SEQ; j++) { |
| 1761 | new_intf->seq_table[j].inuse = 0; |
| 1762 | new_intf->seq_table[j].seqid = 0; |
| 1763 | } |
| 1764 | new_intf->curr_seq = 0; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 1765 | #ifdef CONFIG_PROC_FS |
| 1766 | spin_lock_init(&(new_intf->proc_entry_lock)); |
| 1767 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | spin_lock_init(&(new_intf->waiting_msgs_lock)); |
| 1769 | INIT_LIST_HEAD(&(new_intf->waiting_msgs)); |
| 1770 | spin_lock_init(&(new_intf->events_lock)); |
| 1771 | INIT_LIST_HEAD(&(new_intf->waiting_events)); |
| 1772 | new_intf->waiting_events_count = 0; |
| 1773 | rwlock_init(&(new_intf->cmd_rcvr_lock)); |
| 1774 | init_waitqueue_head(&new_intf->waitq); |
| 1775 | INIT_LIST_HEAD(&(new_intf->cmd_rcvrs)); |
| 1776 | new_intf->all_cmd_rcvr = NULL; |
| 1777 | |
| 1778 | spin_lock_init(&(new_intf->counter_lock)); |
| 1779 | |
| 1780 | spin_lock_irqsave(&interfaces_lock, flags); |
| 1781 | ipmi_interfaces[i] = new_intf; |
| 1782 | spin_unlock_irqrestore(&interfaces_lock, flags); |
| 1783 | |
| 1784 | rv = 0; |
| 1785 | *intf = new_intf; |
| 1786 | break; |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | downgrade_write(&interfaces_sem); |
| 1791 | |
| 1792 | if (rv == 0) |
| 1793 | rv = add_proc_entries(*intf, i); |
| 1794 | |
| 1795 | if (rv == 0) { |
| 1796 | if ((version_major > 1) |
| 1797 | || ((version_major == 1) && (version_minor >= 5))) |
| 1798 | { |
| 1799 | /* Start scanning the channels to see what is |
| 1800 | available. */ |
| 1801 | (*intf)->null_user_handler = channel_handler; |
| 1802 | (*intf)->curr_channel = 0; |
| 1803 | rv = send_channel_info_cmd(*intf, 0); |
| 1804 | if (rv) |
| 1805 | goto out; |
| 1806 | |
| 1807 | /* Wait for the channel info to be read. */ |
| 1808 | up_read(&interfaces_sem); |
| 1809 | wait_event((*intf)->waitq, |
| 1810 | ((*intf)->curr_channel>=IPMI_MAX_CHANNELS)); |
| 1811 | down_read(&interfaces_sem); |
| 1812 | |
| 1813 | if (ipmi_interfaces[i] != new_intf) |
| 1814 | /* Well, it went away. Just return. */ |
| 1815 | goto out; |
| 1816 | } else { |
| 1817 | /* Assume a single IPMB channel at zero. */ |
| 1818 | (*intf)->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; |
| 1819 | (*intf)->channels[0].protocol |
| 1820 | = IPMI_CHANNEL_PROTOCOL_IPMB; |
| 1821 | } |
| 1822 | |
| 1823 | /* Call all the watcher interfaces to tell |
| 1824 | them that a new interface is available. */ |
| 1825 | call_smi_watchers(i); |
| 1826 | } |
| 1827 | |
| 1828 | out: |
| 1829 | up_read(&interfaces_sem); |
| 1830 | |
| 1831 | if (rv) { |
| 1832 | if (new_intf->proc_dir) |
| 1833 | remove_proc_entries(new_intf); |
| 1834 | kfree(new_intf); |
| 1835 | } |
| 1836 | |
| 1837 | return rv; |
| 1838 | } |
| 1839 | |
| 1840 | static void free_recv_msg_list(struct list_head *q) |
| 1841 | { |
| 1842 | struct ipmi_recv_msg *msg, *msg2; |
| 1843 | |
| 1844 | list_for_each_entry_safe(msg, msg2, q, link) { |
| 1845 | list_del(&msg->link); |
| 1846 | ipmi_free_recv_msg(msg); |
| 1847 | } |
| 1848 | } |
| 1849 | |
| 1850 | static void free_cmd_rcvr_list(struct list_head *q) |
| 1851 | { |
| 1852 | struct cmd_rcvr *rcvr, *rcvr2; |
| 1853 | |
| 1854 | list_for_each_entry_safe(rcvr, rcvr2, q, link) { |
| 1855 | list_del(&rcvr->link); |
| 1856 | kfree(rcvr); |
| 1857 | } |
| 1858 | } |
| 1859 | |
| 1860 | static void clean_up_interface_data(ipmi_smi_t intf) |
| 1861 | { |
| 1862 | int i; |
| 1863 | |
| 1864 | free_recv_msg_list(&(intf->waiting_msgs)); |
| 1865 | free_recv_msg_list(&(intf->waiting_events)); |
| 1866 | free_cmd_rcvr_list(&(intf->cmd_rcvrs)); |
| 1867 | |
| 1868 | for (i=0; i<IPMI_IPMB_NUM_SEQ; i++) { |
| 1869 | if ((intf->seq_table[i].inuse) |
| 1870 | && (intf->seq_table[i].recv_msg)) |
| 1871 | { |
| 1872 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
| 1873 | } |
| 1874 | } |
| 1875 | } |
| 1876 | |
| 1877 | int ipmi_unregister_smi(ipmi_smi_t intf) |
| 1878 | { |
| 1879 | int rv = -ENODEV; |
| 1880 | int i; |
| 1881 | struct ipmi_smi_watcher *w; |
| 1882 | unsigned long flags; |
| 1883 | |
| 1884 | down_write(&interfaces_sem); |
| 1885 | if (list_empty(&(intf->users))) |
| 1886 | { |
| 1887 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 1888 | if (ipmi_interfaces[i] == intf) { |
| 1889 | remove_proc_entries(intf); |
| 1890 | spin_lock_irqsave(&interfaces_lock, flags); |
| 1891 | ipmi_interfaces[i] = NULL; |
| 1892 | clean_up_interface_data(intf); |
| 1893 | spin_unlock_irqrestore(&interfaces_lock,flags); |
| 1894 | kfree(intf); |
| 1895 | rv = 0; |
| 1896 | goto out_call_watcher; |
| 1897 | } |
| 1898 | } |
| 1899 | } else { |
| 1900 | rv = -EBUSY; |
| 1901 | } |
| 1902 | up_write(&interfaces_sem); |
| 1903 | |
| 1904 | return rv; |
| 1905 | |
| 1906 | out_call_watcher: |
| 1907 | downgrade_write(&interfaces_sem); |
| 1908 | |
| 1909 | /* Call all the watcher interfaces to tell them that |
| 1910 | an interface is gone. */ |
| 1911 | down_read(&smi_watchers_sem); |
| 1912 | list_for_each_entry(w, &smi_watchers, link) { |
| 1913 | w->smi_gone(i); |
| 1914 | } |
| 1915 | up_read(&smi_watchers_sem); |
| 1916 | up_read(&interfaces_sem); |
| 1917 | return 0; |
| 1918 | } |
| 1919 | |
| 1920 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, |
| 1921 | struct ipmi_smi_msg *msg) |
| 1922 | { |
| 1923 | struct ipmi_ipmb_addr ipmb_addr; |
| 1924 | struct ipmi_recv_msg *recv_msg; |
| 1925 | unsigned long flags; |
| 1926 | |
| 1927 | |
| 1928 | /* This is 11, not 10, because the response must contain a |
| 1929 | * completion code. */ |
| 1930 | if (msg->rsp_size < 11) { |
| 1931 | /* Message not big enough, just ignore it. */ |
| 1932 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1933 | intf->invalid_ipmb_responses++; |
| 1934 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1935 | return 0; |
| 1936 | } |
| 1937 | |
| 1938 | if (msg->rsp[2] != 0) { |
| 1939 | /* An error getting the response, just ignore it. */ |
| 1940 | return 0; |
| 1941 | } |
| 1942 | |
| 1943 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; |
| 1944 | ipmb_addr.slave_addr = msg->rsp[6]; |
| 1945 | ipmb_addr.channel = msg->rsp[3] & 0x0f; |
| 1946 | ipmb_addr.lun = msg->rsp[7] & 3; |
| 1947 | |
| 1948 | /* It's a response from a remote entity. Look up the sequence |
| 1949 | number and handle the response. */ |
| 1950 | if (intf_find_seq(intf, |
| 1951 | msg->rsp[7] >> 2, |
| 1952 | msg->rsp[3] & 0x0f, |
| 1953 | msg->rsp[8], |
| 1954 | (msg->rsp[4] >> 2) & (~1), |
| 1955 | (struct ipmi_addr *) &(ipmb_addr), |
| 1956 | &recv_msg)) |
| 1957 | { |
| 1958 | /* We were unable to find the sequence number, |
| 1959 | so just nuke the message. */ |
| 1960 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1961 | intf->unhandled_ipmb_responses++; |
| 1962 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1963 | return 0; |
| 1964 | } |
| 1965 | |
| 1966 | memcpy(recv_msg->msg_data, |
| 1967 | &(msg->rsp[9]), |
| 1968 | msg->rsp_size - 9); |
| 1969 | /* THe other fields matched, so no need to set them, except |
| 1970 | for netfn, which needs to be the response that was |
| 1971 | returned, not the request value. */ |
| 1972 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
| 1973 | recv_msg->msg.data = recv_msg->msg_data; |
| 1974 | recv_msg->msg.data_len = msg->rsp_size - 10; |
| 1975 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
| 1976 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1977 | intf->handled_ipmb_responses++; |
| 1978 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 1979 | deliver_response(recv_msg); |
| 1980 | |
| 1981 | return 0; |
| 1982 | } |
| 1983 | |
| 1984 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, |
| 1985 | struct ipmi_smi_msg *msg) |
| 1986 | { |
| 1987 | struct cmd_rcvr *rcvr; |
| 1988 | int rv = 0; |
| 1989 | unsigned char netfn; |
| 1990 | unsigned char cmd; |
| 1991 | ipmi_user_t user = NULL; |
| 1992 | struct ipmi_ipmb_addr *ipmb_addr; |
| 1993 | struct ipmi_recv_msg *recv_msg; |
| 1994 | unsigned long flags; |
| 1995 | |
| 1996 | if (msg->rsp_size < 10) { |
| 1997 | /* Message not big enough, just ignore it. */ |
| 1998 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 1999 | intf->invalid_commands++; |
| 2000 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2001 | return 0; |
| 2002 | } |
| 2003 | |
| 2004 | if (msg->rsp[2] != 0) { |
| 2005 | /* An error getting the response, just ignore it. */ |
| 2006 | return 0; |
| 2007 | } |
| 2008 | |
| 2009 | netfn = msg->rsp[4] >> 2; |
| 2010 | cmd = msg->rsp[8]; |
| 2011 | |
| 2012 | read_lock(&(intf->cmd_rcvr_lock)); |
| 2013 | |
| 2014 | if (intf->all_cmd_rcvr) { |
| 2015 | user = intf->all_cmd_rcvr; |
| 2016 | } else { |
| 2017 | /* Find the command/netfn. */ |
| 2018 | list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) { |
| 2019 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { |
| 2020 | user = rcvr->user; |
| 2021 | break; |
| 2022 | } |
| 2023 | } |
| 2024 | } |
| 2025 | read_unlock(&(intf->cmd_rcvr_lock)); |
| 2026 | |
| 2027 | if (user == NULL) { |
| 2028 | /* We didn't find a user, deliver an error response. */ |
| 2029 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2030 | intf->unhandled_commands++; |
| 2031 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2032 | |
| 2033 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
| 2034 | msg->data[1] = IPMI_SEND_MSG_CMD; |
| 2035 | msg->data[2] = msg->rsp[3]; |
| 2036 | msg->data[3] = msg->rsp[6]; |
| 2037 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
| 2038 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 2039 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | /* rqseq/lun */ |
| 2041 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); |
| 2042 | msg->data[8] = msg->rsp[8]; /* cmd */ |
| 2043 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; |
| 2044 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); |
| 2045 | msg->data_size = 11; |
| 2046 | |
| 2047 | #ifdef DEBUG_MSGING |
| 2048 | { |
| 2049 | int m; |
| 2050 | printk("Invalid command:"); |
| 2051 | for (m=0; m<msg->data_size; m++) |
| 2052 | printk(" %2.2x", msg->data[m]); |
| 2053 | printk("\n"); |
| 2054 | } |
| 2055 | #endif |
| 2056 | intf->handlers->sender(intf->send_info, msg, 0); |
| 2057 | |
| 2058 | rv = -1; /* We used the message, so return the value that |
| 2059 | causes it to not be freed or queued. */ |
| 2060 | } else { |
| 2061 | /* Deliver the message to the user. */ |
| 2062 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2063 | intf->handled_commands++; |
| 2064 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2065 | |
| 2066 | recv_msg = ipmi_alloc_recv_msg(); |
| 2067 | if (! recv_msg) { |
| 2068 | /* We couldn't allocate memory for the |
| 2069 | message, so requeue it for handling |
| 2070 | later. */ |
| 2071 | rv = 1; |
| 2072 | } else { |
| 2073 | /* Extract the source address from the data. */ |
| 2074 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; |
| 2075 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
| 2076 | ipmb_addr->slave_addr = msg->rsp[6]; |
| 2077 | ipmb_addr->lun = msg->rsp[7] & 3; |
| 2078 | ipmb_addr->channel = msg->rsp[3] & 0xf; |
| 2079 | |
| 2080 | /* Extract the rest of the message information |
| 2081 | from the IPMB header.*/ |
| 2082 | recv_msg->user = user; |
| 2083 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; |
| 2084 | recv_msg->msgid = msg->rsp[7] >> 2; |
| 2085 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
| 2086 | recv_msg->msg.cmd = msg->rsp[8]; |
| 2087 | recv_msg->msg.data = recv_msg->msg_data; |
| 2088 | |
| 2089 | /* We chop off 10, not 9 bytes because the checksum |
| 2090 | at the end also needs to be removed. */ |
| 2091 | recv_msg->msg.data_len = msg->rsp_size - 10; |
| 2092 | memcpy(recv_msg->msg_data, |
| 2093 | &(msg->rsp[9]), |
| 2094 | msg->rsp_size - 10); |
| 2095 | deliver_response(recv_msg); |
| 2096 | } |
| 2097 | } |
| 2098 | |
| 2099 | return rv; |
| 2100 | } |
| 2101 | |
| 2102 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, |
| 2103 | struct ipmi_smi_msg *msg) |
| 2104 | { |
| 2105 | struct ipmi_lan_addr lan_addr; |
| 2106 | struct ipmi_recv_msg *recv_msg; |
| 2107 | unsigned long flags; |
| 2108 | |
| 2109 | |
| 2110 | /* This is 13, not 12, because the response must contain a |
| 2111 | * completion code. */ |
| 2112 | if (msg->rsp_size < 13) { |
| 2113 | /* Message not big enough, just ignore it. */ |
| 2114 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2115 | intf->invalid_lan_responses++; |
| 2116 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2117 | return 0; |
| 2118 | } |
| 2119 | |
| 2120 | if (msg->rsp[2] != 0) { |
| 2121 | /* An error getting the response, just ignore it. */ |
| 2122 | return 0; |
| 2123 | } |
| 2124 | |
| 2125 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; |
| 2126 | lan_addr.session_handle = msg->rsp[4]; |
| 2127 | lan_addr.remote_SWID = msg->rsp[8]; |
| 2128 | lan_addr.local_SWID = msg->rsp[5]; |
| 2129 | lan_addr.channel = msg->rsp[3] & 0x0f; |
| 2130 | lan_addr.privilege = msg->rsp[3] >> 4; |
| 2131 | lan_addr.lun = msg->rsp[9] & 3; |
| 2132 | |
| 2133 | /* It's a response from a remote entity. Look up the sequence |
| 2134 | number and handle the response. */ |
| 2135 | if (intf_find_seq(intf, |
| 2136 | msg->rsp[9] >> 2, |
| 2137 | msg->rsp[3] & 0x0f, |
| 2138 | msg->rsp[10], |
| 2139 | (msg->rsp[6] >> 2) & (~1), |
| 2140 | (struct ipmi_addr *) &(lan_addr), |
| 2141 | &recv_msg)) |
| 2142 | { |
| 2143 | /* We were unable to find the sequence number, |
| 2144 | so just nuke the message. */ |
| 2145 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2146 | intf->unhandled_lan_responses++; |
| 2147 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2148 | return 0; |
| 2149 | } |
| 2150 | |
| 2151 | memcpy(recv_msg->msg_data, |
| 2152 | &(msg->rsp[11]), |
| 2153 | msg->rsp_size - 11); |
| 2154 | /* The other fields matched, so no need to set them, except |
| 2155 | for netfn, which needs to be the response that was |
| 2156 | returned, not the request value. */ |
| 2157 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
| 2158 | recv_msg->msg.data = recv_msg->msg_data; |
| 2159 | recv_msg->msg.data_len = msg->rsp_size - 12; |
| 2160 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
| 2161 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2162 | intf->handled_lan_responses++; |
| 2163 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2164 | deliver_response(recv_msg); |
| 2165 | |
| 2166 | return 0; |
| 2167 | } |
| 2168 | |
| 2169 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, |
| 2170 | struct ipmi_smi_msg *msg) |
| 2171 | { |
| 2172 | struct cmd_rcvr *rcvr; |
| 2173 | int rv = 0; |
| 2174 | unsigned char netfn; |
| 2175 | unsigned char cmd; |
| 2176 | ipmi_user_t user = NULL; |
| 2177 | struct ipmi_lan_addr *lan_addr; |
| 2178 | struct ipmi_recv_msg *recv_msg; |
| 2179 | unsigned long flags; |
| 2180 | |
| 2181 | if (msg->rsp_size < 12) { |
| 2182 | /* Message not big enough, just ignore it. */ |
| 2183 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2184 | intf->invalid_commands++; |
| 2185 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2186 | return 0; |
| 2187 | } |
| 2188 | |
| 2189 | if (msg->rsp[2] != 0) { |
| 2190 | /* An error getting the response, just ignore it. */ |
| 2191 | return 0; |
| 2192 | } |
| 2193 | |
| 2194 | netfn = msg->rsp[6] >> 2; |
| 2195 | cmd = msg->rsp[10]; |
| 2196 | |
| 2197 | read_lock(&(intf->cmd_rcvr_lock)); |
| 2198 | |
| 2199 | if (intf->all_cmd_rcvr) { |
| 2200 | user = intf->all_cmd_rcvr; |
| 2201 | } else { |
| 2202 | /* Find the command/netfn. */ |
| 2203 | list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) { |
| 2204 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { |
| 2205 | user = rcvr->user; |
| 2206 | break; |
| 2207 | } |
| 2208 | } |
| 2209 | } |
| 2210 | read_unlock(&(intf->cmd_rcvr_lock)); |
| 2211 | |
| 2212 | if (user == NULL) { |
| 2213 | /* We didn't find a user, deliver an error response. */ |
| 2214 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2215 | intf->unhandled_commands++; |
| 2216 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2217 | |
| 2218 | rv = 0; /* Don't do anything with these messages, just |
| 2219 | allow them to be freed. */ |
| 2220 | } else { |
| 2221 | /* Deliver the message to the user. */ |
| 2222 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2223 | intf->handled_commands++; |
| 2224 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2225 | |
| 2226 | recv_msg = ipmi_alloc_recv_msg(); |
| 2227 | if (! recv_msg) { |
| 2228 | /* We couldn't allocate memory for the |
| 2229 | message, so requeue it for handling |
| 2230 | later. */ |
| 2231 | rv = 1; |
| 2232 | } else { |
| 2233 | /* Extract the source address from the data. */ |
| 2234 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; |
| 2235 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; |
| 2236 | lan_addr->session_handle = msg->rsp[4]; |
| 2237 | lan_addr->remote_SWID = msg->rsp[8]; |
| 2238 | lan_addr->local_SWID = msg->rsp[5]; |
| 2239 | lan_addr->lun = msg->rsp[9] & 3; |
| 2240 | lan_addr->channel = msg->rsp[3] & 0xf; |
| 2241 | lan_addr->privilege = msg->rsp[3] >> 4; |
| 2242 | |
| 2243 | /* Extract the rest of the message information |
| 2244 | from the IPMB header.*/ |
| 2245 | recv_msg->user = user; |
| 2246 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; |
| 2247 | recv_msg->msgid = msg->rsp[9] >> 2; |
| 2248 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
| 2249 | recv_msg->msg.cmd = msg->rsp[10]; |
| 2250 | recv_msg->msg.data = recv_msg->msg_data; |
| 2251 | |
| 2252 | /* We chop off 12, not 11 bytes because the checksum |
| 2253 | at the end also needs to be removed. */ |
| 2254 | recv_msg->msg.data_len = msg->rsp_size - 12; |
| 2255 | memcpy(recv_msg->msg_data, |
| 2256 | &(msg->rsp[11]), |
| 2257 | msg->rsp_size - 12); |
| 2258 | deliver_response(recv_msg); |
| 2259 | } |
| 2260 | } |
| 2261 | |
| 2262 | return rv; |
| 2263 | } |
| 2264 | |
| 2265 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
| 2266 | struct ipmi_smi_msg *msg) |
| 2267 | { |
| 2268 | struct ipmi_system_interface_addr *smi_addr; |
| 2269 | |
| 2270 | recv_msg->msgid = 0; |
| 2271 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); |
| 2272 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 2273 | smi_addr->channel = IPMI_BMC_CHANNEL; |
| 2274 | smi_addr->lun = msg->rsp[0] & 3; |
| 2275 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; |
| 2276 | recv_msg->msg.netfn = msg->rsp[0] >> 2; |
| 2277 | recv_msg->msg.cmd = msg->rsp[1]; |
| 2278 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); |
| 2279 | recv_msg->msg.data = recv_msg->msg_data; |
| 2280 | recv_msg->msg.data_len = msg->rsp_size - 3; |
| 2281 | } |
| 2282 | |
| 2283 | /* This will be called with the intf->users_lock read-locked, so no need |
| 2284 | to do that here. */ |
| 2285 | static int handle_read_event_rsp(ipmi_smi_t intf, |
| 2286 | struct ipmi_smi_msg *msg) |
| 2287 | { |
| 2288 | struct ipmi_recv_msg *recv_msg, *recv_msg2; |
| 2289 | struct list_head msgs; |
| 2290 | ipmi_user_t user; |
| 2291 | int rv = 0; |
| 2292 | int deliver_count = 0; |
| 2293 | unsigned long flags; |
| 2294 | |
| 2295 | if (msg->rsp_size < 19) { |
| 2296 | /* Message is too small to be an IPMB event. */ |
| 2297 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2298 | intf->invalid_events++; |
| 2299 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2300 | return 0; |
| 2301 | } |
| 2302 | |
| 2303 | if (msg->rsp[2] != 0) { |
| 2304 | /* An error getting the event, just ignore it. */ |
| 2305 | return 0; |
| 2306 | } |
| 2307 | |
| 2308 | INIT_LIST_HEAD(&msgs); |
| 2309 | |
| 2310 | spin_lock_irqsave(&(intf->events_lock), flags); |
| 2311 | |
| 2312 | spin_lock(&intf->counter_lock); |
| 2313 | intf->events++; |
| 2314 | spin_unlock(&intf->counter_lock); |
| 2315 | |
| 2316 | /* Allocate and fill in one message for every user that is getting |
| 2317 | events. */ |
| 2318 | list_for_each_entry(user, &(intf->users), link) { |
| 2319 | if (! user->gets_events) |
| 2320 | continue; |
| 2321 | |
| 2322 | recv_msg = ipmi_alloc_recv_msg(); |
| 2323 | if (! recv_msg) { |
| 2324 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { |
| 2325 | list_del(&recv_msg->link); |
| 2326 | ipmi_free_recv_msg(recv_msg); |
| 2327 | } |
| 2328 | /* We couldn't allocate memory for the |
| 2329 | message, so requeue it for handling |
| 2330 | later. */ |
| 2331 | rv = 1; |
| 2332 | goto out; |
| 2333 | } |
| 2334 | |
| 2335 | deliver_count++; |
| 2336 | |
| 2337 | copy_event_into_recv_msg(recv_msg, msg); |
| 2338 | recv_msg->user = user; |
| 2339 | list_add_tail(&(recv_msg->link), &msgs); |
| 2340 | } |
| 2341 | |
| 2342 | if (deliver_count) { |
| 2343 | /* Now deliver all the messages. */ |
| 2344 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { |
| 2345 | list_del(&recv_msg->link); |
| 2346 | deliver_response(recv_msg); |
| 2347 | } |
| 2348 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { |
| 2349 | /* No one to receive the message, put it in queue if there's |
| 2350 | not already too many things in the queue. */ |
| 2351 | recv_msg = ipmi_alloc_recv_msg(); |
| 2352 | if (! recv_msg) { |
| 2353 | /* We couldn't allocate memory for the |
| 2354 | message, so requeue it for handling |
| 2355 | later. */ |
| 2356 | rv = 1; |
| 2357 | goto out; |
| 2358 | } |
| 2359 | |
| 2360 | copy_event_into_recv_msg(recv_msg, msg); |
| 2361 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); |
| 2362 | } else { |
| 2363 | /* There's too many things in the queue, discard this |
| 2364 | message. */ |
| 2365 | printk(KERN_WARNING PFX "Event queue full, discarding an" |
| 2366 | " incoming event\n"); |
| 2367 | } |
| 2368 | |
| 2369 | out: |
| 2370 | spin_unlock_irqrestore(&(intf->events_lock), flags); |
| 2371 | |
| 2372 | return rv; |
| 2373 | } |
| 2374 | |
| 2375 | static int handle_bmc_rsp(ipmi_smi_t intf, |
| 2376 | struct ipmi_smi_msg *msg) |
| 2377 | { |
| 2378 | struct ipmi_recv_msg *recv_msg; |
| 2379 | int found = 0; |
| 2380 | struct ipmi_user *user; |
| 2381 | unsigned long flags; |
| 2382 | |
| 2383 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; |
| 2384 | |
| 2385 | /* Make sure the user still exists. */ |
| 2386 | list_for_each_entry(user, &(intf->users), link) { |
| 2387 | if (user == recv_msg->user) { |
| 2388 | /* Found it, so we can deliver it */ |
| 2389 | found = 1; |
| 2390 | break; |
| 2391 | } |
| 2392 | } |
| 2393 | |
| 2394 | if (!found) { |
| 2395 | /* Special handling for NULL users. */ |
| 2396 | if (!recv_msg->user && intf->null_user_handler){ |
| 2397 | intf->null_user_handler(intf, msg); |
| 2398 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2399 | intf->handled_local_responses++; |
| 2400 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2401 | }else{ |
| 2402 | /* The user for the message went away, so give up. */ |
| 2403 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2404 | intf->unhandled_local_responses++; |
| 2405 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2406 | } |
| 2407 | ipmi_free_recv_msg(recv_msg); |
| 2408 | } else { |
| 2409 | struct ipmi_system_interface_addr *smi_addr; |
| 2410 | |
| 2411 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2412 | intf->handled_local_responses++; |
| 2413 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2414 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
| 2415 | recv_msg->msgid = msg->msgid; |
| 2416 | smi_addr = ((struct ipmi_system_interface_addr *) |
| 2417 | &(recv_msg->addr)); |
| 2418 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 2419 | smi_addr->channel = IPMI_BMC_CHANNEL; |
| 2420 | smi_addr->lun = msg->rsp[0] & 3; |
| 2421 | recv_msg->msg.netfn = msg->rsp[0] >> 2; |
| 2422 | recv_msg->msg.cmd = msg->rsp[1]; |
| 2423 | memcpy(recv_msg->msg_data, |
| 2424 | &(msg->rsp[2]), |
| 2425 | msg->rsp_size - 2); |
| 2426 | recv_msg->msg.data = recv_msg->msg_data; |
| 2427 | recv_msg->msg.data_len = msg->rsp_size - 2; |
| 2428 | deliver_response(recv_msg); |
| 2429 | } |
| 2430 | |
| 2431 | return 0; |
| 2432 | } |
| 2433 | |
| 2434 | /* Handle a new message. Return 1 if the message should be requeued, |
| 2435 | 0 if the message should be freed, or -1 if the message should not |
| 2436 | be freed or requeued. */ |
| 2437 | static int handle_new_recv_msg(ipmi_smi_t intf, |
| 2438 | struct ipmi_smi_msg *msg) |
| 2439 | { |
| 2440 | int requeue; |
| 2441 | int chan; |
| 2442 | |
| 2443 | #ifdef DEBUG_MSGING |
| 2444 | int m; |
| 2445 | printk("Recv:"); |
| 2446 | for (m=0; m<msg->rsp_size; m++) |
| 2447 | printk(" %2.2x", msg->rsp[m]); |
| 2448 | printk("\n"); |
| 2449 | #endif |
| 2450 | if (msg->rsp_size < 2) { |
| 2451 | /* Message is too small to be correct. */ |
| 2452 | printk(KERN_WARNING PFX "BMC returned to small a message" |
| 2453 | " for netfn %x cmd %x, got %d bytes\n", |
| 2454 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); |
| 2455 | |
| 2456 | /* Generate an error response for the message. */ |
| 2457 | msg->rsp[0] = msg->data[0] | (1 << 2); |
| 2458 | msg->rsp[1] = msg->data[1]; |
| 2459 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; |
| 2460 | msg->rsp_size = 3; |
| 2461 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))/* Netfn */ |
| 2462 | || (msg->rsp[1] != msg->data[1])) /* Command */ |
| 2463 | { |
| 2464 | /* The response is not even marginally correct. */ |
| 2465 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
| 2466 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", |
| 2467 | (msg->data[0] >> 2) | 1, msg->data[1], |
| 2468 | msg->rsp[0] >> 2, msg->rsp[1]); |
| 2469 | |
| 2470 | /* Generate an error response for the message. */ |
| 2471 | msg->rsp[0] = msg->data[0] | (1 << 2); |
| 2472 | msg->rsp[1] = msg->data[1]; |
| 2473 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; |
| 2474 | msg->rsp_size = 3; |
| 2475 | } |
| 2476 | |
| 2477 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
| 2478 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) |
| 2479 | && (msg->user_data != NULL)) |
| 2480 | { |
| 2481 | /* It's a response to a response we sent. For this we |
| 2482 | deliver a send message response to the user. */ |
| 2483 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
| 2484 | |
| 2485 | requeue = 0; |
| 2486 | if (msg->rsp_size < 2) |
| 2487 | /* Message is too small to be correct. */ |
| 2488 | goto out; |
| 2489 | |
| 2490 | chan = msg->data[2] & 0x0f; |
| 2491 | if (chan >= IPMI_MAX_CHANNELS) |
| 2492 | /* Invalid channel number */ |
| 2493 | goto out; |
| 2494 | |
| 2495 | if (recv_msg) { |
| 2496 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; |
| 2497 | recv_msg->msg.data = recv_msg->msg_data; |
| 2498 | recv_msg->msg.data_len = 1; |
| 2499 | recv_msg->msg_data[0] = msg->rsp[2]; |
| 2500 | deliver_response(recv_msg); |
| 2501 | } |
| 2502 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
| 2503 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) |
| 2504 | { |
| 2505 | /* It's from the receive queue. */ |
| 2506 | chan = msg->rsp[3] & 0xf; |
| 2507 | if (chan >= IPMI_MAX_CHANNELS) { |
| 2508 | /* Invalid channel number */ |
| 2509 | requeue = 0; |
| 2510 | goto out; |
| 2511 | } |
| 2512 | |
| 2513 | switch (intf->channels[chan].medium) { |
| 2514 | case IPMI_CHANNEL_MEDIUM_IPMB: |
| 2515 | if (msg->rsp[4] & 0x04) { |
| 2516 | /* It's a response, so find the |
| 2517 | requesting message and send it up. */ |
| 2518 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
| 2519 | } else { |
| 2520 | /* It's a command to the SMS from some other |
| 2521 | entity. Handle that. */ |
| 2522 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
| 2523 | } |
| 2524 | break; |
| 2525 | |
| 2526 | case IPMI_CHANNEL_MEDIUM_8023LAN: |
| 2527 | case IPMI_CHANNEL_MEDIUM_ASYNC: |
| 2528 | if (msg->rsp[6] & 0x04) { |
| 2529 | /* It's a response, so find the |
| 2530 | requesting message and send it up. */ |
| 2531 | requeue = handle_lan_get_msg_rsp(intf, msg); |
| 2532 | } else { |
| 2533 | /* It's a command to the SMS from some other |
| 2534 | entity. Handle that. */ |
| 2535 | requeue = handle_lan_get_msg_cmd(intf, msg); |
| 2536 | } |
| 2537 | break; |
| 2538 | |
| 2539 | default: |
| 2540 | /* We don't handle the channel type, so just |
| 2541 | * free the message. */ |
| 2542 | requeue = 0; |
| 2543 | } |
| 2544 | |
| 2545 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
| 2546 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) |
| 2547 | { |
| 2548 | /* It's an asyncronous event. */ |
| 2549 | requeue = handle_read_event_rsp(intf, msg); |
| 2550 | } else { |
| 2551 | /* It's a response from the local BMC. */ |
| 2552 | requeue = handle_bmc_rsp(intf, msg); |
| 2553 | } |
| 2554 | |
| 2555 | out: |
| 2556 | return requeue; |
| 2557 | } |
| 2558 | |
| 2559 | /* Handle a new message from the lower layer. */ |
| 2560 | void ipmi_smi_msg_received(ipmi_smi_t intf, |
| 2561 | struct ipmi_smi_msg *msg) |
| 2562 | { |
| 2563 | unsigned long flags; |
| 2564 | int rv; |
| 2565 | |
| 2566 | |
| 2567 | /* Lock the user lock so the user can't go away while we are |
| 2568 | working on it. */ |
| 2569 | read_lock(&(intf->users_lock)); |
| 2570 | |
| 2571 | if ((msg->data_size >= 2) |
| 2572 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) |
| 2573 | && (msg->data[1] == IPMI_SEND_MSG_CMD) |
| 2574 | && (msg->user_data == NULL)) { |
| 2575 | /* This is the local response to a command send, start |
| 2576 | the timer for these. The user_data will not be |
| 2577 | NULL if this is a response send, and we will let |
| 2578 | response sends just go through. */ |
| 2579 | |
| 2580 | /* Check for errors, if we get certain errors (ones |
| 2581 | that mean basically we can try again later), we |
| 2582 | ignore them and start the timer. Otherwise we |
| 2583 | report the error immediately. */ |
| 2584 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
| 2585 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) |
| 2586 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)) |
| 2587 | { |
| 2588 | int chan = msg->rsp[3] & 0xf; |
| 2589 | |
| 2590 | /* Got an error sending the message, handle it. */ |
| 2591 | spin_lock_irqsave(&intf->counter_lock, flags); |
| 2592 | if (chan >= IPMI_MAX_CHANNELS) |
| 2593 | ; /* This shouldn't happen */ |
| 2594 | else if ((intf->channels[chan].medium |
| 2595 | == IPMI_CHANNEL_MEDIUM_8023LAN) |
| 2596 | || (intf->channels[chan].medium |
| 2597 | == IPMI_CHANNEL_MEDIUM_ASYNC)) |
| 2598 | intf->sent_lan_command_errs++; |
| 2599 | else |
| 2600 | intf->sent_ipmb_command_errs++; |
| 2601 | spin_unlock_irqrestore(&intf->counter_lock, flags); |
| 2602 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
| 2603 | } else { |
| 2604 | /* The message was sent, start the timer. */ |
| 2605 | intf_start_seq_timer(intf, msg->msgid); |
| 2606 | } |
| 2607 | |
| 2608 | ipmi_free_smi_msg(msg); |
| 2609 | goto out_unlock; |
| 2610 | } |
| 2611 | |
| 2612 | /* To preserve message order, if the list is not empty, we |
| 2613 | tack this message onto the end of the list. */ |
| 2614 | spin_lock_irqsave(&(intf->waiting_msgs_lock), flags); |
| 2615 | if (!list_empty(&(intf->waiting_msgs))) { |
| 2616 | list_add_tail(&(msg->link), &(intf->waiting_msgs)); |
| 2617 | spin_unlock(&(intf->waiting_msgs_lock)); |
| 2618 | goto out_unlock; |
| 2619 | } |
| 2620 | spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags); |
| 2621 | |
| 2622 | rv = handle_new_recv_msg(intf, msg); |
| 2623 | if (rv > 0) { |
| 2624 | /* Could not handle the message now, just add it to a |
| 2625 | list to handle later. */ |
| 2626 | spin_lock(&(intf->waiting_msgs_lock)); |
| 2627 | list_add_tail(&(msg->link), &(intf->waiting_msgs)); |
| 2628 | spin_unlock(&(intf->waiting_msgs_lock)); |
| 2629 | } else if (rv == 0) { |
| 2630 | ipmi_free_smi_msg(msg); |
| 2631 | } |
| 2632 | |
| 2633 | out_unlock: |
| 2634 | read_unlock(&(intf->users_lock)); |
| 2635 | } |
| 2636 | |
| 2637 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) |
| 2638 | { |
| 2639 | ipmi_user_t user; |
| 2640 | |
| 2641 | read_lock(&(intf->users_lock)); |
| 2642 | list_for_each_entry(user, &(intf->users), link) { |
| 2643 | if (! user->handler->ipmi_watchdog_pretimeout) |
| 2644 | continue; |
| 2645 | |
| 2646 | user->handler->ipmi_watchdog_pretimeout(user->handler_data); |
| 2647 | } |
| 2648 | read_unlock(&(intf->users_lock)); |
| 2649 | } |
| 2650 | |
| 2651 | static void |
| 2652 | handle_msg_timeout(struct ipmi_recv_msg *msg) |
| 2653 | { |
| 2654 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
| 2655 | msg->msg_data[0] = IPMI_TIMEOUT_COMPLETION_CODE; |
| 2656 | msg->msg.netfn |= 1; /* Convert to a response. */ |
| 2657 | msg->msg.data_len = 1; |
| 2658 | msg->msg.data = msg->msg_data; |
| 2659 | deliver_response(msg); |
| 2660 | } |
| 2661 | |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2662 | static struct ipmi_smi_msg * |
| 2663 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, |
| 2664 | unsigned char seq, long seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | { |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2666 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | if (!smi_msg) |
| 2668 | /* If we can't allocate the message, then just return, we |
| 2669 | get 4 retries, so this should be ok. */ |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2670 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | |
| 2672 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); |
| 2673 | smi_msg->data_size = recv_msg->msg.data_len; |
| 2674 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); |
| 2675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | #ifdef DEBUG_MSGING |
| 2677 | { |
| 2678 | int m; |
| 2679 | printk("Resend: "); |
| 2680 | for (m=0; m<smi_msg->data_size; m++) |
| 2681 | printk(" %2.2x", smi_msg->data[m]); |
| 2682 | printk("\n"); |
| 2683 | } |
| 2684 | #endif |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2685 | return smi_msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | } |
| 2687 | |
| 2688 | static void |
| 2689 | ipmi_timeout_handler(long timeout_period) |
| 2690 | { |
| 2691 | ipmi_smi_t intf; |
| 2692 | struct list_head timeouts; |
| 2693 | struct ipmi_recv_msg *msg, *msg2; |
| 2694 | struct ipmi_smi_msg *smi_msg, *smi_msg2; |
| 2695 | unsigned long flags; |
| 2696 | int i, j; |
| 2697 | |
| 2698 | INIT_LIST_HEAD(&timeouts); |
| 2699 | |
| 2700 | spin_lock(&interfaces_lock); |
| 2701 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 2702 | intf = ipmi_interfaces[i]; |
| 2703 | if (intf == NULL) |
| 2704 | continue; |
| 2705 | |
| 2706 | read_lock(&(intf->users_lock)); |
| 2707 | |
| 2708 | /* See if any waiting messages need to be processed. */ |
| 2709 | spin_lock_irqsave(&(intf->waiting_msgs_lock), flags); |
| 2710 | list_for_each_entry_safe(smi_msg, smi_msg2, &(intf->waiting_msgs), link) { |
| 2711 | if (! handle_new_recv_msg(intf, smi_msg)) { |
| 2712 | list_del(&smi_msg->link); |
| 2713 | ipmi_free_smi_msg(smi_msg); |
| 2714 | } else { |
| 2715 | /* To preserve message order, quit if we |
| 2716 | can't handle a message. */ |
| 2717 | break; |
| 2718 | } |
| 2719 | } |
| 2720 | spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags); |
| 2721 | |
| 2722 | /* Go through the seq table and find any messages that |
| 2723 | have timed out, putting them in the timeouts |
| 2724 | list. */ |
| 2725 | spin_lock_irqsave(&(intf->seq_lock), flags); |
| 2726 | for (j=0; j<IPMI_IPMB_NUM_SEQ; j++) { |
| 2727 | struct seq_table *ent = &(intf->seq_table[j]); |
| 2728 | if (!ent->inuse) |
| 2729 | continue; |
| 2730 | |
| 2731 | ent->timeout -= timeout_period; |
| 2732 | if (ent->timeout > 0) |
| 2733 | continue; |
| 2734 | |
| 2735 | if (ent->retries_left == 0) { |
| 2736 | /* The message has used all its retries. */ |
| 2737 | ent->inuse = 0; |
| 2738 | msg = ent->recv_msg; |
| 2739 | list_add_tail(&(msg->link), &timeouts); |
| 2740 | spin_lock(&intf->counter_lock); |
| 2741 | if (ent->broadcast) |
| 2742 | intf->timed_out_ipmb_broadcasts++; |
| 2743 | else if (ent->recv_msg->addr.addr_type |
| 2744 | == IPMI_LAN_ADDR_TYPE) |
| 2745 | intf->timed_out_lan_commands++; |
| 2746 | else |
| 2747 | intf->timed_out_ipmb_commands++; |
| 2748 | spin_unlock(&intf->counter_lock); |
| 2749 | } else { |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2750 | struct ipmi_smi_msg *smi_msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | /* More retries, send again. */ |
| 2752 | |
| 2753 | /* Start with the max timer, set to normal |
| 2754 | timer after the message is sent. */ |
| 2755 | ent->timeout = MAX_MSG_TIMEOUT; |
| 2756 | ent->retries_left--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | spin_lock(&intf->counter_lock); |
| 2758 | if (ent->recv_msg->addr.addr_type |
| 2759 | == IPMI_LAN_ADDR_TYPE) |
| 2760 | intf->retransmitted_lan_commands++; |
| 2761 | else |
| 2762 | intf->retransmitted_ipmb_commands++; |
| 2763 | spin_unlock(&intf->counter_lock); |
Corey Minyard | 882fe01 | 2005-05-01 08:59:12 -0700 | [diff] [blame] | 2764 | smi_msg = smi_from_recv_msg(intf, |
| 2765 | ent->recv_msg, j, ent->seqid); |
| 2766 | if(!smi_msg) |
| 2767 | continue; |
| 2768 | |
| 2769 | spin_unlock_irqrestore(&(intf->seq_lock),flags); |
| 2770 | /* Send the new message. We send with a zero |
| 2771 | * priority. It timed out, I doubt time is |
| 2772 | * that critical now, and high priority |
| 2773 | * messages are really only for messages to the |
| 2774 | * local MC, which don't get resent. */ |
| 2775 | intf->handlers->sender(intf->send_info, |
| 2776 | smi_msg, 0); |
| 2777 | spin_lock_irqsave(&(intf->seq_lock), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | } |
| 2779 | } |
| 2780 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
| 2781 | |
| 2782 | list_for_each_entry_safe(msg, msg2, &timeouts, link) { |
| 2783 | handle_msg_timeout(msg); |
| 2784 | } |
| 2785 | |
| 2786 | read_unlock(&(intf->users_lock)); |
| 2787 | } |
| 2788 | spin_unlock(&interfaces_lock); |
| 2789 | } |
| 2790 | |
| 2791 | static void ipmi_request_event(void) |
| 2792 | { |
| 2793 | ipmi_smi_t intf; |
| 2794 | int i; |
| 2795 | |
| 2796 | spin_lock(&interfaces_lock); |
| 2797 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 2798 | intf = ipmi_interfaces[i]; |
| 2799 | if (intf == NULL) |
| 2800 | continue; |
| 2801 | |
| 2802 | intf->handlers->request_events(intf->send_info); |
| 2803 | } |
| 2804 | spin_unlock(&interfaces_lock); |
| 2805 | } |
| 2806 | |
| 2807 | static struct timer_list ipmi_timer; |
| 2808 | |
| 2809 | /* Call every ~100 ms. */ |
| 2810 | #define IPMI_TIMEOUT_TIME 100 |
| 2811 | |
| 2812 | /* How many jiffies does it take to get to the timeout time. */ |
| 2813 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) |
| 2814 | |
| 2815 | /* Request events from the queue every second (this is the number of |
| 2816 | IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the |
| 2817 | future, IPMI will add a way to know immediately if an event is in |
| 2818 | the queue and this silliness can go away. */ |
| 2819 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) |
| 2820 | |
Corey Minyard | 8f43f84 | 2005-06-23 22:01:40 -0700 | [diff] [blame] | 2821 | static atomic_t stop_operation; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
| 2823 | |
| 2824 | static void ipmi_timeout(unsigned long data) |
| 2825 | { |
Corey Minyard | 8f43f84 | 2005-06-23 22:01:40 -0700 | [diff] [blame] | 2826 | if (atomic_read(&stop_operation)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2827 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | |
| 2829 | ticks_to_req_ev--; |
| 2830 | if (ticks_to_req_ev == 0) { |
| 2831 | ipmi_request_event(); |
| 2832 | ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
| 2833 | } |
| 2834 | |
| 2835 | ipmi_timeout_handler(IPMI_TIMEOUT_TIME); |
| 2836 | |
Corey Minyard | 8f43f84 | 2005-06-23 22:01:40 -0700 | [diff] [blame] | 2837 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | } |
| 2839 | |
| 2840 | |
| 2841 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); |
| 2842 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); |
| 2843 | |
| 2844 | /* FIXME - convert these to slabs. */ |
| 2845 | static void free_smi_msg(struct ipmi_smi_msg *msg) |
| 2846 | { |
| 2847 | atomic_dec(&smi_msg_inuse_count); |
| 2848 | kfree(msg); |
| 2849 | } |
| 2850 | |
| 2851 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) |
| 2852 | { |
| 2853 | struct ipmi_smi_msg *rv; |
| 2854 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); |
| 2855 | if (rv) { |
| 2856 | rv->done = free_smi_msg; |
| 2857 | rv->user_data = NULL; |
| 2858 | atomic_inc(&smi_msg_inuse_count); |
| 2859 | } |
| 2860 | return rv; |
| 2861 | } |
| 2862 | |
| 2863 | static void free_recv_msg(struct ipmi_recv_msg *msg) |
| 2864 | { |
| 2865 | atomic_dec(&recv_msg_inuse_count); |
| 2866 | kfree(msg); |
| 2867 | } |
| 2868 | |
| 2869 | struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
| 2870 | { |
| 2871 | struct ipmi_recv_msg *rv; |
| 2872 | |
| 2873 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); |
| 2874 | if (rv) { |
| 2875 | rv->done = free_recv_msg; |
| 2876 | atomic_inc(&recv_msg_inuse_count); |
| 2877 | } |
| 2878 | return rv; |
| 2879 | } |
| 2880 | |
| 2881 | #ifdef CONFIG_IPMI_PANIC_EVENT |
| 2882 | |
| 2883 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
| 2884 | { |
| 2885 | } |
| 2886 | |
| 2887 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) |
| 2888 | { |
| 2889 | } |
| 2890 | |
| 2891 | #ifdef CONFIG_IPMI_PANIC_STRING |
| 2892 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_smi_msg *msg) |
| 2893 | { |
| 2894 | if ((msg->rsp[0] == (IPMI_NETFN_SENSOR_EVENT_RESPONSE << 2)) |
| 2895 | && (msg->rsp[1] == IPMI_GET_EVENT_RECEIVER_CMD) |
| 2896 | && (msg->rsp[2] == IPMI_CC_NO_ERROR)) |
| 2897 | { |
| 2898 | /* A get event receiver command, save it. */ |
| 2899 | intf->event_receiver = msg->rsp[3]; |
| 2900 | intf->event_receiver_lun = msg->rsp[4] & 0x3; |
| 2901 | } |
| 2902 | } |
| 2903 | |
| 2904 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_smi_msg *msg) |
| 2905 | { |
| 2906 | if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2)) |
| 2907 | && (msg->rsp[1] == IPMI_GET_DEVICE_ID_CMD) |
| 2908 | && (msg->rsp[2] == IPMI_CC_NO_ERROR)) |
| 2909 | { |
| 2910 | /* A get device id command, save if we are an event |
| 2911 | receiver or generator. */ |
| 2912 | intf->local_sel_device = (msg->rsp[8] >> 2) & 1; |
| 2913 | intf->local_event_generator = (msg->rsp[8] >> 5) & 1; |
| 2914 | } |
| 2915 | } |
| 2916 | #endif |
| 2917 | |
| 2918 | static void send_panic_events(char *str) |
| 2919 | { |
| 2920 | struct kernel_ipmi_msg msg; |
| 2921 | ipmi_smi_t intf; |
| 2922 | unsigned char data[16]; |
| 2923 | int i; |
| 2924 | struct ipmi_system_interface_addr *si; |
| 2925 | struct ipmi_addr addr; |
| 2926 | struct ipmi_smi_msg smi_msg; |
| 2927 | struct ipmi_recv_msg recv_msg; |
| 2928 | |
| 2929 | si = (struct ipmi_system_interface_addr *) &addr; |
| 2930 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 2931 | si->channel = IPMI_BMC_CHANNEL; |
| 2932 | si->lun = 0; |
| 2933 | |
| 2934 | /* Fill in an event telling that we have failed. */ |
| 2935 | msg.netfn = 0x04; /* Sensor or Event. */ |
| 2936 | msg.cmd = 2; /* Platform event command. */ |
| 2937 | msg.data = data; |
| 2938 | msg.data_len = 8; |
| 2939 | data[0] = 0x21; /* Kernel generator ID, IPMI table 5-4 */ |
| 2940 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
| 2941 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ |
| 2942 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ |
| 2943 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ |
| 2944 | |
| 2945 | /* Put a few breadcrumbs in. Hopefully later we can add more things |
| 2946 | to make the panic events more useful. */ |
| 2947 | if (str) { |
| 2948 | data[3] = str[0]; |
| 2949 | data[6] = str[1]; |
| 2950 | data[7] = str[2]; |
| 2951 | } |
| 2952 | |
| 2953 | smi_msg.done = dummy_smi_done_handler; |
| 2954 | recv_msg.done = dummy_recv_done_handler; |
| 2955 | |
| 2956 | /* For every registered interface, send the event. */ |
| 2957 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 2958 | intf = ipmi_interfaces[i]; |
| 2959 | if (intf == NULL) |
| 2960 | continue; |
| 2961 | |
| 2962 | /* Send the event announcing the panic. */ |
| 2963 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
| 2964 | i_ipmi_request(NULL, |
| 2965 | intf, |
| 2966 | &addr, |
| 2967 | 0, |
| 2968 | &msg, |
| 2969 | NULL, |
| 2970 | &smi_msg, |
| 2971 | &recv_msg, |
| 2972 | 0, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 2973 | intf->channels[0].address, |
| 2974 | intf->channels[0].lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | 0, 1); /* Don't retry, and don't wait. */ |
| 2976 | } |
| 2977 | |
| 2978 | #ifdef CONFIG_IPMI_PANIC_STRING |
| 2979 | /* On every interface, dump a bunch of OEM event holding the |
| 2980 | string. */ |
| 2981 | if (!str) |
| 2982 | return; |
| 2983 | |
| 2984 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 2985 | char *p = str; |
| 2986 | struct ipmi_ipmb_addr *ipmb; |
| 2987 | int j; |
| 2988 | |
| 2989 | intf = ipmi_interfaces[i]; |
| 2990 | if (intf == NULL) |
| 2991 | continue; |
| 2992 | |
| 2993 | /* First job here is to figure out where to send the |
| 2994 | OEM events. There's no way in IPMI to send OEM |
| 2995 | events using an event send command, so we have to |
| 2996 | find the SEL to put them in and stick them in |
| 2997 | there. */ |
| 2998 | |
| 2999 | /* Get capabilities from the get device id. */ |
| 3000 | intf->local_sel_device = 0; |
| 3001 | intf->local_event_generator = 0; |
| 3002 | intf->event_receiver = 0; |
| 3003 | |
| 3004 | /* Request the device info from the local MC. */ |
| 3005 | msg.netfn = IPMI_NETFN_APP_REQUEST; |
| 3006 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; |
| 3007 | msg.data = NULL; |
| 3008 | msg.data_len = 0; |
| 3009 | intf->null_user_handler = device_id_fetcher; |
| 3010 | i_ipmi_request(NULL, |
| 3011 | intf, |
| 3012 | &addr, |
| 3013 | 0, |
| 3014 | &msg, |
| 3015 | NULL, |
| 3016 | &smi_msg, |
| 3017 | &recv_msg, |
| 3018 | 0, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 3019 | intf->channels[0].address, |
| 3020 | intf->channels[0].lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | 0, 1); /* Don't retry, and don't wait. */ |
| 3022 | |
| 3023 | if (intf->local_event_generator) { |
| 3024 | /* Request the event receiver from the local MC. */ |
| 3025 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; |
| 3026 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; |
| 3027 | msg.data = NULL; |
| 3028 | msg.data_len = 0; |
| 3029 | intf->null_user_handler = event_receiver_fetcher; |
| 3030 | i_ipmi_request(NULL, |
| 3031 | intf, |
| 3032 | &addr, |
| 3033 | 0, |
| 3034 | &msg, |
| 3035 | NULL, |
| 3036 | &smi_msg, |
| 3037 | &recv_msg, |
| 3038 | 0, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 3039 | intf->channels[0].address, |
| 3040 | intf->channels[0].lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3041 | 0, 1); /* no retry, and no wait. */ |
| 3042 | } |
| 3043 | intf->null_user_handler = NULL; |
| 3044 | |
| 3045 | /* Validate the event receiver. The low bit must not |
| 3046 | be 1 (it must be a valid IPMB address), it cannot |
| 3047 | be zero, and it must not be my address. */ |
| 3048 | if (((intf->event_receiver & 1) == 0) |
| 3049 | && (intf->event_receiver != 0) |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 3050 | && (intf->event_receiver != intf->channels[0].address)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | { |
| 3052 | /* The event receiver is valid, send an IPMB |
| 3053 | message. */ |
| 3054 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
| 3055 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; |
| 3056 | ipmb->channel = 0; /* FIXME - is this right? */ |
| 3057 | ipmb->lun = intf->event_receiver_lun; |
| 3058 | ipmb->slave_addr = intf->event_receiver; |
| 3059 | } else if (intf->local_sel_device) { |
| 3060 | /* The event receiver was not valid (or was |
| 3061 | me), but I am an SEL device, just dump it |
| 3062 | in my SEL. */ |
| 3063 | si = (struct ipmi_system_interface_addr *) &addr; |
| 3064 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 3065 | si->channel = IPMI_BMC_CHANNEL; |
| 3066 | si->lun = 0; |
| 3067 | } else |
| 3068 | continue; /* No where to send the event. */ |
| 3069 | |
| 3070 | |
| 3071 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
| 3072 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; |
| 3073 | msg.data = data; |
| 3074 | msg.data_len = 16; |
| 3075 | |
| 3076 | j = 0; |
| 3077 | while (*p) { |
| 3078 | int size = strlen(p); |
| 3079 | |
| 3080 | if (size > 11) |
| 3081 | size = 11; |
| 3082 | data[0] = 0; |
| 3083 | data[1] = 0; |
| 3084 | data[2] = 0xf0; /* OEM event without timestamp. */ |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 3085 | data[3] = intf->channels[0].address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | data[4] = j++; /* sequence # */ |
| 3087 | /* Always give 11 bytes, so strncpy will fill |
| 3088 | it with zeroes for me. */ |
| 3089 | strncpy(data+5, p, 11); |
| 3090 | p += size; |
| 3091 | |
| 3092 | i_ipmi_request(NULL, |
| 3093 | intf, |
| 3094 | &addr, |
| 3095 | 0, |
| 3096 | &msg, |
| 3097 | NULL, |
| 3098 | &smi_msg, |
| 3099 | &recv_msg, |
| 3100 | 0, |
Corey Minyard | c14979b | 2005-09-06 15:18:38 -0700 | [diff] [blame^] | 3101 | intf->channels[0].address, |
| 3102 | intf->channels[0].lun, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3103 | 0, 1); /* no retry, and no wait. */ |
| 3104 | } |
| 3105 | } |
| 3106 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
| 3107 | } |
| 3108 | #endif /* CONFIG_IPMI_PANIC_EVENT */ |
| 3109 | |
| 3110 | static int has_paniced = 0; |
| 3111 | |
| 3112 | static int panic_event(struct notifier_block *this, |
| 3113 | unsigned long event, |
| 3114 | void *ptr) |
| 3115 | { |
| 3116 | int i; |
| 3117 | ipmi_smi_t intf; |
| 3118 | |
| 3119 | if (has_paniced) |
| 3120 | return NOTIFY_DONE; |
| 3121 | has_paniced = 1; |
| 3122 | |
| 3123 | /* For every registered interface, set it to run to completion. */ |
| 3124 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 3125 | intf = ipmi_interfaces[i]; |
| 3126 | if (intf == NULL) |
| 3127 | continue; |
| 3128 | |
| 3129 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
| 3130 | } |
| 3131 | |
| 3132 | #ifdef CONFIG_IPMI_PANIC_EVENT |
| 3133 | send_panic_events(ptr); |
| 3134 | #endif |
| 3135 | |
| 3136 | return NOTIFY_DONE; |
| 3137 | } |
| 3138 | |
| 3139 | static struct notifier_block panic_block = { |
| 3140 | .notifier_call = panic_event, |
| 3141 | .next = NULL, |
| 3142 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ |
| 3143 | }; |
| 3144 | |
| 3145 | static int ipmi_init_msghandler(void) |
| 3146 | { |
| 3147 | int i; |
| 3148 | |
| 3149 | if (initialized) |
| 3150 | return 0; |
| 3151 | |
| 3152 | printk(KERN_INFO "ipmi message handler version " |
| 3153 | IPMI_MSGHANDLER_VERSION "\n"); |
| 3154 | |
| 3155 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { |
| 3156 | ipmi_interfaces[i] = NULL; |
| 3157 | } |
| 3158 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 3159 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3160 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
| 3161 | if (!proc_ipmi_root) { |
| 3162 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); |
| 3163 | return -ENOMEM; |
| 3164 | } |
| 3165 | |
| 3166 | proc_ipmi_root->owner = THIS_MODULE; |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 3167 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | |
| 3169 | init_timer(&ipmi_timer); |
| 3170 | ipmi_timer.data = 0; |
| 3171 | ipmi_timer.function = ipmi_timeout; |
| 3172 | ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES; |
| 3173 | add_timer(&ipmi_timer); |
| 3174 | |
| 3175 | notifier_chain_register(&panic_notifier_list, &panic_block); |
| 3176 | |
| 3177 | initialized = 1; |
| 3178 | |
| 3179 | return 0; |
| 3180 | } |
| 3181 | |
| 3182 | static __init int ipmi_init_msghandler_mod(void) |
| 3183 | { |
| 3184 | ipmi_init_msghandler(); |
| 3185 | return 0; |
| 3186 | } |
| 3187 | |
| 3188 | static __exit void cleanup_ipmi(void) |
| 3189 | { |
| 3190 | int count; |
| 3191 | |
| 3192 | if (!initialized) |
| 3193 | return; |
| 3194 | |
| 3195 | notifier_chain_unregister(&panic_notifier_list, &panic_block); |
| 3196 | |
| 3197 | /* This can't be called if any interfaces exist, so no worry about |
| 3198 | shutting down the interfaces. */ |
| 3199 | |
| 3200 | /* Tell the timer to stop, then wait for it to stop. This avoids |
| 3201 | problems with race conditions removing the timer here. */ |
Corey Minyard | 8f43f84 | 2005-06-23 22:01:40 -0700 | [diff] [blame] | 3202 | atomic_inc(&stop_operation); |
| 3203 | del_timer_sync(&ipmi_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 3205 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3206 | remove_proc_entry(proc_ipmi_root->name, &proc_root); |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 3207 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3208 | |
| 3209 | initialized = 0; |
| 3210 | |
| 3211 | /* Check for buffer leaks. */ |
| 3212 | count = atomic_read(&smi_msg_inuse_count); |
| 3213 | if (count != 0) |
| 3214 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", |
| 3215 | count); |
| 3216 | count = atomic_read(&recv_msg_inuse_count); |
| 3217 | if (count != 0) |
| 3218 | printk(KERN_WARNING PFX "recv message count %d at exit\n", |
| 3219 | count); |
| 3220 | } |
| 3221 | module_exit(cleanup_ipmi); |
| 3222 | |
| 3223 | module_init(ipmi_init_msghandler_mod); |
| 3224 | MODULE_LICENSE("GPL"); |
| 3225 | |
| 3226 | EXPORT_SYMBOL(ipmi_create_user); |
| 3227 | EXPORT_SYMBOL(ipmi_destroy_user); |
| 3228 | EXPORT_SYMBOL(ipmi_get_version); |
| 3229 | EXPORT_SYMBOL(ipmi_request_settime); |
| 3230 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
| 3231 | EXPORT_SYMBOL(ipmi_register_smi); |
| 3232 | EXPORT_SYMBOL(ipmi_unregister_smi); |
| 3233 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
| 3234 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
| 3235 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
| 3236 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
| 3237 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
| 3238 | EXPORT_SYMBOL(ipmi_addr_length); |
| 3239 | EXPORT_SYMBOL(ipmi_validate_addr); |
| 3240 | EXPORT_SYMBOL(ipmi_set_gets_events); |
| 3241 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
| 3242 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
| 3243 | EXPORT_SYMBOL(ipmi_set_my_address); |
| 3244 | EXPORT_SYMBOL(ipmi_get_my_address); |
| 3245 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
| 3246 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
| 3247 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
Corey Minyard | 3b62594 | 2005-06-23 22:01:42 -0700 | [diff] [blame] | 3248 | EXPORT_SYMBOL(proc_ipmi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3249 | EXPORT_SYMBOL(ipmi_user_set_run_to_completion); |