1 /* 2 * ipmi_si.c 3 * 4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC, 5 * BT). 6 * 7 * Author: MontaVista Software, Inc. 8 * Corey Minyard <minyard@mvista.com> 9 * source@mvista.com 10 * 11 * Copyright 2002 MontaVista Software Inc. 12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> 13 * 14 * This program is free software; you can redistribute it and/or modify it 15 * under the terms of the GNU General Public License as published by the 16 * Free Software Foundation; either version 2 of the License, or (at your 17 * option) any later version. 18 * 19 * 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * You should have received a copy of the GNU General Public License along 32 * with this program; if not, write to the Free Software Foundation, Inc., 33 * 675 Mass Ave, Cambridge, MA 02139, USA. 34 */ 35 36 /* 37 * This file holds the "policy" for the interface to the SMI state 38 * machine. It does the configuration, handles timers and interrupts, 39 * and drives the real SMI state machine. 40 */ 41 42 #include <linux/module.h> 43 #include <linux/moduleparam.h> 44 #include <asm/system.h> 45 #include <linux/sched.h> 46 #include <linux/timer.h> 47 #include <linux/errno.h> 48 #include <linux/spinlock.h> 49 #include <linux/slab.h> 50 #include <linux/delay.h> 51 #include <linux/list.h> 52 #include <linux/pci.h> 53 #include <linux/ioport.h> 54 #include <linux/notifier.h> 55 #include <linux/mutex.h> 56 #include <linux/kthread.h> 57 #include <asm/irq.h> 58 #include <linux/interrupt.h> 59 #include <linux/rcupdate.h> 60 #include <linux/ipmi_smi.h> 61 #include <asm/io.h> 62 #include "ipmi_si_sm.h" 63 #include <linux/init.h> 64 #include <linux/dmi.h> 65 #include <linux/string.h> 66 #include <linux/ctype.h> 67 #include <linux/pnp.h> 68 69 #ifdef CONFIG_PPC_OF 70 #include <linux/of_device.h> 71 #include <linux/of_platform.h> 72 #endif 73 74 #define PFX "ipmi_si: " 75 76 /* Measure times between events in the driver. */ 77 #undef DEBUG_TIMING 78 79 /* Call every 10 ms. */ 80 #define SI_TIMEOUT_TIME_USEC 10000 81 #define SI_USEC_PER_JIFFY (1000000/HZ) 82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) 83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a 84 short timeout */ 85 86 enum si_intf_state { 87 SI_NORMAL, 88 SI_GETTING_FLAGS, 89 SI_GETTING_EVENTS, 90 SI_CLEARING_FLAGS, 91 SI_CLEARING_FLAGS_THEN_SET_IRQ, 92 SI_GETTING_MESSAGES, 93 SI_ENABLE_INTERRUPTS1, 94 SI_ENABLE_INTERRUPTS2, 95 SI_DISABLE_INTERRUPTS1, 96 SI_DISABLE_INTERRUPTS2 97 /* FIXME - add watchdog stuff. */ 98 }; 99 100 /* Some BT-specific defines we need here. */ 101 #define IPMI_BT_INTMASK_REG 2 102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 104 105 enum si_type { 106 SI_KCS, SI_SMIC, SI_BT 107 }; 108 static char *si_to_str[] = { "kcs", "smic", "bt" }; 109 110 #define DEVICE_NAME "ipmi_si" 111 112 static struct platform_driver ipmi_driver = { 113 .driver = { 114 .name = DEVICE_NAME, 115 .bus = &platform_bus_type 116 } 117 }; 118 119 120 /* 121 * Indexes into stats[] in smi_info below. 122 */ 123 enum si_stat_indexes { 124 /* 125 * Number of times the driver requested a timer while an operation 126 * was in progress. 127 */ 128 SI_STAT_short_timeouts = 0, 129 130 /* 131 * Number of times the driver requested a timer while nothing was in 132 * progress. 133 */ 134 SI_STAT_long_timeouts, 135 136 /* Number of times the interface was idle while being polled. */ 137 SI_STAT_idles, 138 139 /* Number of interrupts the driver handled. */ 140 SI_STAT_interrupts, 141 142 /* Number of time the driver got an ATTN from the hardware. */ 143 SI_STAT_attentions, 144 145 /* Number of times the driver requested flags from the hardware. */ 146 SI_STAT_flag_fetches, 147 148 /* Number of times the hardware didn't follow the state machine. */ 149 SI_STAT_hosed_count, 150 151 /* Number of completed messages. */ 152 SI_STAT_complete_transactions, 153 154 /* Number of IPMI events received from the hardware. */ 155 SI_STAT_events, 156 157 /* Number of watchdog pretimeouts. */ 158 SI_STAT_watchdog_pretimeouts, 159 160 /* Number of asyncronous messages received. */ 161 SI_STAT_incoming_messages, 162 163 164 /* This *must* remain last, add new values above this. */ 165 SI_NUM_STATS 166 }; 167 168 struct smi_info { 169 int intf_num; 170 ipmi_smi_t intf; 171 struct si_sm_data *si_sm; 172 struct si_sm_handlers *handlers; 173 enum si_type si_type; 174 spinlock_t si_lock; 175 spinlock_t msg_lock; 176 struct list_head xmit_msgs; 177 struct list_head hp_xmit_msgs; 178 struct ipmi_smi_msg *curr_msg; 179 enum si_intf_state si_state; 180 181 /* 182 * Used to handle the various types of I/O that can occur with 183 * IPMI 184 */ 185 struct si_sm_io io; 186 int (*io_setup)(struct smi_info *info); 187 void (*io_cleanup)(struct smi_info *info); 188 int (*irq_setup)(struct smi_info *info); 189 void (*irq_cleanup)(struct smi_info *info); 190 unsigned int io_size; 191 char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */ 192 void (*addr_source_cleanup)(struct smi_info *info); 193 void *addr_source_data; 194 195 /* 196 * Per-OEM handler, called from handle_flags(). Returns 1 197 * when handle_flags() needs to be re-run or 0 indicating it 198 * set si_state itself. 199 */ 200 int (*oem_data_avail_handler)(struct smi_info *smi_info); 201 202 /* 203 * Flags from the last GET_MSG_FLAGS command, used when an ATTN 204 * is set to hold the flags until we are done handling everything 205 * from the flags. 206 */ 207 #define RECEIVE_MSG_AVAIL 0x01 208 #define EVENT_MSG_BUFFER_FULL 0x02 209 #define WDT_PRE_TIMEOUT_INT 0x08 210 #define OEM0_DATA_AVAIL 0x20 211 #define OEM1_DATA_AVAIL 0x40 212 #define OEM2_DATA_AVAIL 0x80 213 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ 214 OEM1_DATA_AVAIL | \ 215 OEM2_DATA_AVAIL) 216 unsigned char msg_flags; 217 218 /* Does the BMC have an event buffer? */ 219 char has_event_buffer; 220 221 /* 222 * If set to true, this will request events the next time the 223 * state machine is idle. 224 */ 225 atomic_t req_events; 226 227 /* 228 * If true, run the state machine to completion on every send 229 * call. Generally used after a panic to make sure stuff goes 230 * out. 231 */ 232 int run_to_completion; 233 234 /* The I/O port of an SI interface. */ 235 int port; 236 237 /* 238 * The space between start addresses of the two ports. For 239 * instance, if the first port is 0xca2 and the spacing is 4, then 240 * the second port is 0xca6. 241 */ 242 unsigned int spacing; 243 244 /* zero if no irq; */ 245 int irq; 246 247 /* The timer for this si. */ 248 struct timer_list si_timer; 249 250 /* The time (in jiffies) the last timeout occurred at. */ 251 unsigned long last_timeout_jiffies; 252 253 /* Used to gracefully stop the timer without race conditions. */ 254 atomic_t stop_operation; 255 256 /* 257 * The driver will disable interrupts when it gets into a 258 * situation where it cannot handle messages due to lack of 259 * memory. Once that situation clears up, it will re-enable 260 * interrupts. 261 */ 262 int interrupt_disabled; 263 264 /* From the get device id response... */ 265 struct ipmi_device_id device_id; 266 267 /* Driver model stuff. */ 268 struct device *dev; 269 struct platform_device *pdev; 270 271 /* 272 * True if we allocated the device, false if it came from 273 * someplace else (like PCI). 274 */ 275 int dev_registered; 276 277 /* Slave address, could be reported from DMI. */ 278 unsigned char slave_addr; 279 280 /* Counters and things for the proc filesystem. */ 281 atomic_t stats[SI_NUM_STATS]; 282 283 struct task_struct *thread; 284 285 struct list_head link; 286 }; 287 288 #define smi_inc_stat(smi, stat) \ 289 atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) 290 #define smi_get_stat(smi, stat) \ 291 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) 292 293 #define SI_MAX_PARMS 4 294 295 static int force_kipmid[SI_MAX_PARMS]; 296 static int num_force_kipmid; 297 298 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; 299 static int num_max_busy_us; 300 301 static int unload_when_empty = 1; 302 303 static int try_smi_init(struct smi_info *smi); 304 static void cleanup_one_si(struct smi_info *to_clean); 305 306 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); 307 static int register_xaction_notifier(struct notifier_block *nb) 308 { 309 return atomic_notifier_chain_register(&xaction_notifier_list, nb); 310 } 311 312 static void deliver_recv_msg(struct smi_info *smi_info, 313 struct ipmi_smi_msg *msg) 314 { 315 /* Deliver the message to the upper layer with the lock 316 released. */ 317 spin_unlock(&(smi_info->si_lock)); 318 ipmi_smi_msg_received(smi_info->intf, msg); 319 spin_lock(&(smi_info->si_lock)); 320 } 321 322 static void return_hosed_msg(struct smi_info *smi_info, int cCode) 323 { 324 struct ipmi_smi_msg *msg = smi_info->curr_msg; 325 326 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) 327 cCode = IPMI_ERR_UNSPECIFIED; 328 /* else use it as is */ 329 330 /* Make it a reponse */ 331 msg->rsp[0] = msg->data[0] | 4; 332 msg->rsp[1] = msg->data[1]; 333 msg->rsp[2] = cCode; 334 msg->rsp_size = 3; 335 336 smi_info->curr_msg = NULL; 337 deliver_recv_msg(smi_info, msg); 338 } 339 340 static enum si_sm_result start_next_msg(struct smi_info *smi_info) 341 { 342 int rv; 343 struct list_head *entry = NULL; 344 #ifdef DEBUG_TIMING 345 struct timeval t; 346 #endif 347 348 /* 349 * No need to save flags, we aleady have interrupts off and we 350 * already hold the SMI lock. 351 */ 352 if (!smi_info->run_to_completion) 353 spin_lock(&(smi_info->msg_lock)); 354 355 /* Pick the high priority queue first. */ 356 if (!list_empty(&(smi_info->hp_xmit_msgs))) { 357 entry = smi_info->hp_xmit_msgs.next; 358 } else if (!list_empty(&(smi_info->xmit_msgs))) { 359 entry = smi_info->xmit_msgs.next; 360 } 361 362 if (!entry) { 363 smi_info->curr_msg = NULL; 364 rv = SI_SM_IDLE; 365 } else { 366 int err; 367 368 list_del(entry); 369 smi_info->curr_msg = list_entry(entry, 370 struct ipmi_smi_msg, 371 link); 372 #ifdef DEBUG_TIMING 373 do_gettimeofday(&t); 374 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); 375 #endif 376 err = atomic_notifier_call_chain(&xaction_notifier_list, 377 0, smi_info); 378 if (err & NOTIFY_STOP_MASK) { 379 rv = SI_SM_CALL_WITHOUT_DELAY; 380 goto out; 381 } 382 err = smi_info->handlers->start_transaction( 383 smi_info->si_sm, 384 smi_info->curr_msg->data, 385 smi_info->curr_msg->data_size); 386 if (err) 387 return_hosed_msg(smi_info, err); 388 389 rv = SI_SM_CALL_WITHOUT_DELAY; 390 } 391 out: 392 if (!smi_info->run_to_completion) 393 spin_unlock(&(smi_info->msg_lock)); 394 395 return rv; 396 } 397 398 static void start_enable_irq(struct smi_info *smi_info) 399 { 400 unsigned char msg[2]; 401 402 /* 403 * If we are enabling interrupts, we have to tell the 404 * BMC to use them. 405 */ 406 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 407 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; 408 409 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); 410 smi_info->si_state = SI_ENABLE_INTERRUPTS1; 411 } 412 413 static void start_disable_irq(struct smi_info *smi_info) 414 { 415 unsigned char msg[2]; 416 417 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 418 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; 419 420 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); 421 smi_info->si_state = SI_DISABLE_INTERRUPTS1; 422 } 423 424 static void start_clear_flags(struct smi_info *smi_info) 425 { 426 unsigned char msg[3]; 427 428 /* Make sure the watchdog pre-timeout flag is not set at startup. */ 429 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 430 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; 431 msg[2] = WDT_PRE_TIMEOUT_INT; 432 433 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); 434 smi_info->si_state = SI_CLEARING_FLAGS; 435 } 436 437 /* 438 * When we have a situtaion where we run out of memory and cannot 439 * allocate messages, we just leave them in the BMC and run the system 440 * polled until we can allocate some memory. Once we have some 441 * memory, we will re-enable the interrupt. 442 */ 443 static inline void disable_si_irq(struct smi_info *smi_info) 444 { 445 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { 446 start_disable_irq(smi_info); 447 smi_info->interrupt_disabled = 1; 448 } 449 } 450 451 static inline void enable_si_irq(struct smi_info *smi_info) 452 { 453 if ((smi_info->irq) && (smi_info->interrupt_disabled)) { 454 start_enable_irq(smi_info); 455 smi_info->interrupt_disabled = 0; 456 } 457 } 458 459 static void handle_flags(struct smi_info *smi_info) 460 { 461 retry: 462 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { 463 /* Watchdog pre-timeout */ 464 smi_inc_stat(smi_info, watchdog_pretimeouts); 465 466 start_clear_flags(smi_info); 467 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; 468 spin_unlock(&(smi_info->si_lock)); 469 ipmi_smi_watchdog_pretimeout(smi_info->intf); 470 spin_lock(&(smi_info->si_lock)); 471 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { 472 /* Messages available. */ 473 smi_info->curr_msg = ipmi_alloc_smi_msg(); 474 if (!smi_info->curr_msg) { 475 disable_si_irq(smi_info); 476 smi_info->si_state = SI_NORMAL; 477 return; 478 } 479 enable_si_irq(smi_info); 480 481 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); 482 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; 483 smi_info->curr_msg->data_size = 2; 484 485 smi_info->handlers->start_transaction( 486 smi_info->si_sm, 487 smi_info->curr_msg->data, 488 smi_info->curr_msg->data_size); 489 smi_info->si_state = SI_GETTING_MESSAGES; 490 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { 491 /* Events available. */ 492 smi_info->curr_msg = ipmi_alloc_smi_msg(); 493 if (!smi_info->curr_msg) { 494 disable_si_irq(smi_info); 495 smi_info->si_state = SI_NORMAL; 496 return; 497 } 498 enable_si_irq(smi_info); 499 500 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); 501 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; 502 smi_info->curr_msg->data_size = 2; 503 504 smi_info->handlers->start_transaction( 505 smi_info->si_sm, 506 smi_info->curr_msg->data, 507 smi_info->curr_msg->data_size); 508 smi_info->si_state = SI_GETTING_EVENTS; 509 } else if (smi_info->msg_flags & OEM_DATA_AVAIL && 510 smi_info->oem_data_avail_handler) { 511 if (smi_info->oem_data_avail_handler(smi_info)) 512 goto retry; 513 } else 514 smi_info->si_state = SI_NORMAL; 515 } 516 517 static void handle_transaction_done(struct smi_info *smi_info) 518 { 519 struct ipmi_smi_msg *msg; 520 #ifdef DEBUG_TIMING 521 struct timeval t; 522 523 do_gettimeofday(&t); 524 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); 525 #endif 526 switch (smi_info->si_state) { 527 case SI_NORMAL: 528 if (!smi_info->curr_msg) 529 break; 530 531 smi_info->curr_msg->rsp_size 532 = smi_info->handlers->get_result( 533 smi_info->si_sm, 534 smi_info->curr_msg->rsp, 535 IPMI_MAX_MSG_LENGTH); 536 537 /* 538 * Do this here becase deliver_recv_msg() releases the 539 * lock, and a new message can be put in during the 540 * time the lock is released. 541 */ 542 msg = smi_info->curr_msg; 543 smi_info->curr_msg = NULL; 544 deliver_recv_msg(smi_info, msg); 545 break; 546 547 case SI_GETTING_FLAGS: 548 { 549 unsigned char msg[4]; 550 unsigned int len; 551 552 /* We got the flags from the SMI, now handle them. */ 553 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); 554 if (msg[2] != 0) { 555 /* Error fetching flags, just give up for now. */ 556 smi_info->si_state = SI_NORMAL; 557 } else if (len < 4) { 558 /* 559 * Hmm, no flags. That's technically illegal, but 560 * don't use uninitialized data. 561 */ 562 smi_info->si_state = SI_NORMAL; 563 } else { 564 smi_info->msg_flags = msg[3]; 565 handle_flags(smi_info); 566 } 567 break; 568 } 569 570 case SI_CLEARING_FLAGS: 571 case SI_CLEARING_FLAGS_THEN_SET_IRQ: 572 { 573 unsigned char msg[3]; 574 575 /* We cleared the flags. */ 576 smi_info->handlers->get_result(smi_info->si_sm, msg, 3); 577 if (msg[2] != 0) { 578 /* Error clearing flags */ 579 printk(KERN_WARNING 580 "ipmi_si: Error clearing flags: %2.2x\n", 581 msg[2]); 582 } 583 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) 584 start_enable_irq(smi_info); 585 else 586 smi_info->si_state = SI_NORMAL; 587 break; 588 } 589 590 case SI_GETTING_EVENTS: 591 { 592 smi_info->curr_msg->rsp_size 593 = smi_info->handlers->get_result( 594 smi_info->si_sm, 595 smi_info->curr_msg->rsp, 596 IPMI_MAX_MSG_LENGTH); 597 598 /* 599 * Do this here becase deliver_recv_msg() releases the 600 * lock, and a new message can be put in during the 601 * time the lock is released. 602 */ 603 msg = smi_info->curr_msg; 604 smi_info->curr_msg = NULL; 605 if (msg->rsp[2] != 0) { 606 /* Error getting event, probably done. */ 607 msg->done(msg); 608 609 /* Take off the event flag. */ 610 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; 611 handle_flags(smi_info); 612 } else { 613 smi_inc_stat(smi_info, events); 614 615 /* 616 * Do this before we deliver the message 617 * because delivering the message releases the 618 * lock and something else can mess with the 619 * state. 620 */ 621 handle_flags(smi_info); 622 623 deliver_recv_msg(smi_info, msg); 624 } 625 break; 626 } 627 628 case SI_GETTING_MESSAGES: 629 { 630 smi_info->curr_msg->rsp_size 631 = smi_info->handlers->get_result( 632 smi_info->si_sm, 633 smi_info->curr_msg->rsp, 634 IPMI_MAX_MSG_LENGTH); 635 636 /* 637 * Do this here becase deliver_recv_msg() releases the 638 * lock, and a new message can be put in during the 639 * time the lock is released. 640 */ 641 msg = smi_info->curr_msg; 642 smi_info->curr_msg = NULL; 643 if (msg->rsp[2] != 0) { 644 /* Error getting event, probably done. */ 645 msg->done(msg); 646 647 /* Take off the msg flag. */ 648 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; 649 handle_flags(smi_info); 650 } else { 651 smi_inc_stat(smi_info, incoming_messages); 652 653 /* 654 * Do this before we deliver the message 655 * because delivering the message releases the 656 * lock and something else can mess with the 657 * state. 658 */ 659 handle_flags(smi_info); 660 661 deliver_recv_msg(smi_info, msg); 662 } 663 break; 664 } 665 666 case SI_ENABLE_INTERRUPTS1: 667 { 668 unsigned char msg[4]; 669 670 /* We got the flags from the SMI, now handle them. */ 671 smi_info->handlers->get_result(smi_info->si_sm, msg, 4); 672 if (msg[2] != 0) { 673 printk(KERN_WARNING 674 "ipmi_si: Could not enable interrupts" 675 ", failed get, using polled mode.\n"); 676 smi_info->si_state = SI_NORMAL; 677 } else { 678 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 679 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; 680 msg[2] = (msg[3] | 681 IPMI_BMC_RCV_MSG_INTR | 682 IPMI_BMC_EVT_MSG_INTR); 683 smi_info->handlers->start_transaction( 684 smi_info->si_sm, msg, 3); 685 smi_info->si_state = SI_ENABLE_INTERRUPTS2; 686 } 687 break; 688 } 689 690 case SI_ENABLE_INTERRUPTS2: 691 { 692 unsigned char msg[4]; 693 694 /* We got the flags from the SMI, now handle them. */ 695 smi_info->handlers->get_result(smi_info->si_sm, msg, 4); 696 if (msg[2] != 0) { 697 printk(KERN_WARNING 698 "ipmi_si: Could not enable interrupts" 699 ", failed set, using polled mode.\n"); 700 } 701 smi_info->si_state = SI_NORMAL; 702 break; 703 } 704 705 case SI_DISABLE_INTERRUPTS1: 706 { 707 unsigned char msg[4]; 708 709 /* We got the flags from the SMI, now handle them. */ 710 smi_info->handlers->get_result(smi_info->si_sm, msg, 4); 711 if (msg[2] != 0) { 712 printk(KERN_WARNING 713 "ipmi_si: Could not disable interrupts" 714 ", failed get.\n"); 715 smi_info->si_state = SI_NORMAL; 716 } else { 717 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 718 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; 719 msg[2] = (msg[3] & 720 ~(IPMI_BMC_RCV_MSG_INTR | 721 IPMI_BMC_EVT_MSG_INTR)); 722 smi_info->handlers->start_transaction( 723 smi_info->si_sm, msg, 3); 724 smi_info->si_state = SI_DISABLE_INTERRUPTS2; 725 } 726 break; 727 } 728 729 case SI_DISABLE_INTERRUPTS2: 730 { 731 unsigned char msg[4]; 732 733 /* We got the flags from the SMI, now handle them. */ 734 smi_info->handlers->get_result(smi_info->si_sm, msg, 4); 735 if (msg[2] != 0) { 736 printk(KERN_WARNING 737 "ipmi_si: Could not disable interrupts" 738 ", failed set.\n"); 739 } 740 smi_info->si_state = SI_NORMAL; 741 break; 742 } 743 } 744 } 745 746 /* 747 * Called on timeouts and events. Timeouts should pass the elapsed 748 * time, interrupts should pass in zero. Must be called with 749 * si_lock held and interrupts disabled. 750 */ 751 static enum si_sm_result smi_event_handler(struct smi_info *smi_info, 752 int time) 753 { 754 enum si_sm_result si_sm_result; 755 756 restart: 757 /* 758 * There used to be a loop here that waited a little while 759 * (around 25us) before giving up. That turned out to be 760 * pointless, the minimum delays I was seeing were in the 300us 761 * range, which is far too long to wait in an interrupt. So 762 * we just run until the state machine tells us something 763 * happened or it needs a delay. 764 */ 765 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); 766 time = 0; 767 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) 768 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); 769 770 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { 771 smi_inc_stat(smi_info, complete_transactions); 772 773 handle_transaction_done(smi_info); 774 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); 775 } else if (si_sm_result == SI_SM_HOSED) { 776 smi_inc_stat(smi_info, hosed_count); 777 778 /* 779 * Do the before return_hosed_msg, because that 780 * releases the lock. 781 */ 782 smi_info->si_state = SI_NORMAL; 783 if (smi_info->curr_msg != NULL) { 784 /* 785 * If we were handling a user message, format 786 * a response to send to the upper layer to 787 * tell it about the error. 788 */ 789 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); 790 } 791 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); 792 } 793 794 /* 795 * We prefer handling attn over new messages. But don't do 796 * this if there is not yet an upper layer to handle anything. 797 */ 798 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { 799 unsigned char msg[2]; 800 801 smi_inc_stat(smi_info, attentions); 802 803 /* 804 * Got a attn, send down a get message flags to see 805 * what's causing it. It would be better to handle 806 * this in the upper layer, but due to the way 807 * interrupts work with the SMI, that's not really 808 * possible. 809 */ 810 msg[0] = (IPMI_NETFN_APP_REQUEST << 2); 811 msg[1] = IPMI_GET_MSG_FLAGS_CMD; 812 813 smi_info->handlers->start_transaction( 814 smi_info->si_sm, msg, 2); 815 smi_info->si_state = SI_GETTING_FLAGS; 816 goto restart; 817 } 818 819 /* If we are currently idle, try to start the next message. */ 820 if (si_sm_result == SI_SM_IDLE) { 821 smi_inc_stat(smi_info, idles); 822 823 si_sm_result = start_next_msg(smi_info); 824 if (si_sm_result != SI_SM_IDLE) 825 goto restart; 826 } 827 828 if ((si_sm_result == SI_SM_IDLE) 829 && (atomic_read(&smi_info->req_events))) { 830 /* 831 * We are idle and the upper layer requested that I fetch 832 * events, so do so. 833 */ 834 atomic_set(&smi_info->req_events, 0); 835 836 smi_info->curr_msg = ipmi_alloc_smi_msg(); 837 if (!smi_info->curr_msg) 838 goto out; 839 840 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); 841 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; 842 smi_info->curr_msg->data_size = 2; 843 844 smi_info->handlers->start_transaction( 845 smi_info->si_sm, 846 smi_info->curr_msg->data, 847 smi_info->curr_msg->data_size); 848 smi_info->si_state = SI_GETTING_EVENTS; 849 goto restart; 850 } 851 out: 852 return si_sm_result; 853 } 854 855 static void sender(void *send_info, 856 struct ipmi_smi_msg *msg, 857 int priority) 858 { 859 struct smi_info *smi_info = send_info; 860 enum si_sm_result result; 861 unsigned long flags; 862 #ifdef DEBUG_TIMING 863 struct timeval t; 864 #endif 865 866 if (atomic_read(&smi_info->stop_operation)) { 867 msg->rsp[0] = msg->data[0] | 4; 868 msg->rsp[1] = msg->data[1]; 869 msg->rsp[2] = IPMI_ERR_UNSPECIFIED; 870 msg->rsp_size = 3; 871 deliver_recv_msg(smi_info, msg); 872 return; 873 } 874 875 #ifdef DEBUG_TIMING 876 do_gettimeofday(&t); 877 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); 878 #endif 879 880 if (smi_info->run_to_completion) { 881 /* 882 * If we are running to completion, then throw it in 883 * the list and run transactions until everything is 884 * clear. Priority doesn't matter here. 885 */ 886 887 /* 888 * Run to completion means we are single-threaded, no 889 * need for locks. 890 */ 891 list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); 892 893 result = smi_event_handler(smi_info, 0); 894 while (result != SI_SM_IDLE) { 895 udelay(SI_SHORT_TIMEOUT_USEC); 896 result = smi_event_handler(smi_info, 897 SI_SHORT_TIMEOUT_USEC); 898 } 899 return; 900 } 901 902 spin_lock_irqsave(&smi_info->msg_lock, flags); 903 if (priority > 0) 904 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); 905 else 906 list_add_tail(&msg->link, &smi_info->xmit_msgs); 907 spin_unlock_irqrestore(&smi_info->msg_lock, flags); 908 909 spin_lock_irqsave(&smi_info->si_lock, flags); 910 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) 911 start_next_msg(smi_info); 912 spin_unlock_irqrestore(&smi_info->si_lock, flags); 913 } 914 915 static void set_run_to_completion(void *send_info, int i_run_to_completion) 916 { 917 struct smi_info *smi_info = send_info; 918 enum si_sm_result result; 919 920 smi_info->run_to_completion = i_run_to_completion; 921 if (i_run_to_completion) { 922 result = smi_event_handler(smi_info, 0); 923 while (result != SI_SM_IDLE) { 924 udelay(SI_SHORT_TIMEOUT_USEC); 925 result = smi_event_handler(smi_info, 926 SI_SHORT_TIMEOUT_USEC); 927 } 928 } 929 } 930 931 /* 932 * Use -1 in the nsec value of the busy waiting timespec to tell that 933 * we are spinning in kipmid looking for something and not delaying 934 * between checks 935 */ 936 static inline void ipmi_si_set_not_busy(struct timespec *ts) 937 { 938 ts->tv_nsec = -1; 939 } 940 static inline int ipmi_si_is_busy(struct timespec *ts) 941 { 942 return ts->tv_nsec != -1; 943 } 944 945 static int ipmi_thread_busy_wait(enum si_sm_result smi_result, 946 const struct smi_info *smi_info, 947 struct timespec *busy_until) 948 { 949 unsigned int max_busy_us = 0; 950 951 if (smi_info->intf_num < num_max_busy_us) 952 max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; 953 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) 954 ipmi_si_set_not_busy(busy_until); 955 else if (!ipmi_si_is_busy(busy_until)) { 956 getnstimeofday(busy_until); 957 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); 958 } else { 959 struct timespec now; 960 getnstimeofday(&now); 961 if (unlikely(timespec_compare(&now, busy_until) > 0)) { 962 ipmi_si_set_not_busy(busy_until); 963 return 0; 964 } 965 } 966 return 1; 967 } 968 969 970 /* 971 * A busy-waiting loop for speeding up IPMI operation. 972 * 973 * Lousy hardware makes this hard. This is only enabled for systems 974 * that are not BT and do not have interrupts. It starts spinning 975 * when an operation is complete or until max_busy tells it to stop 976 * (if that is enabled). See the paragraph on kimid_max_busy_us in 977 * Documentation/IPMI.txt for details. 978 */ 979 static int ipmi_thread(void *data) 980 { 981 struct smi_info *smi_info = data; 982 unsigned long flags; 983 enum si_sm_result smi_result; 984 struct timespec busy_until; 985 986 ipmi_si_set_not_busy(&busy_until); 987 set_user_nice(current, 19); 988 while (!kthread_should_stop()) { 989 int busy_wait; 990 991 spin_lock_irqsave(&(smi_info->si_lock), flags); 992 smi_result = smi_event_handler(smi_info, 0); 993 spin_unlock_irqrestore(&(smi_info->si_lock), flags); 994 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, 995 &busy_until); 996 if (smi_result == SI_SM_CALL_WITHOUT_DELAY) 997 ; /* do nothing */ 998 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) 999 schedule(); 1000 else 1001 schedule_timeout_interruptible(0); 1002 } 1003 return 0; 1004 } 1005 1006 1007 static void poll(void *send_info) 1008 { 1009 struct smi_info *smi_info = send_info; 1010 unsigned long flags; 1011 1012 /* 1013 * Make sure there is some delay in the poll loop so we can 1014 * drive time forward and timeout things. 1015 */ 1016 udelay(10); 1017 spin_lock_irqsave(&smi_info->si_lock, flags); 1018 smi_event_handler(smi_info, 10); 1019 spin_unlock_irqrestore(&smi_info->si_lock, flags); 1020 } 1021 1022 static void request_events(void *send_info) 1023 { 1024 struct smi_info *smi_info = send_info; 1025 1026 if (atomic_read(&smi_info->stop_operation) || 1027 !smi_info->has_event_buffer) 1028 return; 1029 1030 atomic_set(&smi_info->req_events, 1); 1031 } 1032 1033 static int initialized; 1034 1035 static void smi_timeout(unsigned long data) 1036 { 1037 struct smi_info *smi_info = (struct smi_info *) data; 1038 enum si_sm_result smi_result; 1039 unsigned long flags; 1040 unsigned long jiffies_now; 1041 long time_diff; 1042 #ifdef DEBUG_TIMING 1043 struct timeval t; 1044 #endif 1045 1046 spin_lock_irqsave(&(smi_info->si_lock), flags); 1047 #ifdef DEBUG_TIMING 1048 do_gettimeofday(&t); 1049 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); 1050 #endif 1051 jiffies_now = jiffies; 1052 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) 1053 * SI_USEC_PER_JIFFY); 1054 smi_result = smi_event_handler(smi_info, time_diff); 1055 1056 spin_unlock_irqrestore(&(smi_info->si_lock), flags); 1057 1058 smi_info->last_timeout_jiffies = jiffies_now; 1059 1060 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { 1061 /* Running with interrupts, only do long timeouts. */ 1062 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; 1063 smi_inc_stat(smi_info, long_timeouts); 1064 goto do_add_timer; 1065 } 1066 1067 /* 1068 * If the state machine asks for a short delay, then shorten 1069 * the timer timeout. 1070 */ 1071 if (smi_result == SI_SM_CALL_WITH_DELAY) { 1072 smi_inc_stat(smi_info, short_timeouts); 1073 smi_info->si_timer.expires = jiffies + 1; 1074 } else { 1075 smi_inc_stat(smi_info, long_timeouts); 1076 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; 1077 } 1078 1079 do_add_timer: 1080 add_timer(&(smi_info->si_timer)); 1081 } 1082 1083 static irqreturn_t si_irq_handler(int irq, void *data) 1084 { 1085 struct smi_info *smi_info = data; 1086 unsigned long flags; 1087 #ifdef DEBUG_TIMING 1088 struct timeval t; 1089 #endif 1090 1091 spin_lock_irqsave(&(smi_info->si_lock), flags); 1092 1093 smi_inc_stat(smi_info, interrupts); 1094 1095 #ifdef DEBUG_TIMING 1096 do_gettimeofday(&t); 1097 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); 1098 #endif 1099 smi_event_handler(smi_info, 0); 1100 spin_unlock_irqrestore(&(smi_info->si_lock), flags); 1101 return IRQ_HANDLED; 1102 } 1103 1104 static irqreturn_t si_bt_irq_handler(int irq, void *data) 1105 { 1106 struct smi_info *smi_info = data; 1107 /* We need to clear the IRQ flag for the BT interface. */ 1108 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 1109 IPMI_BT_INTMASK_CLEAR_IRQ_BIT 1110 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); 1111 return si_irq_handler(irq, data); 1112 } 1113 1114 static int smi_start_processing(void *send_info, 1115 ipmi_smi_t intf) 1116 { 1117 struct smi_info *new_smi = send_info; 1118 int enable = 0; 1119 1120 new_smi->intf = intf; 1121 1122 /* Try to claim any interrupts. */ 1123 if (new_smi->irq_setup) 1124 new_smi->irq_setup(new_smi); 1125 1126 /* Set up the timer that drives the interface. */ 1127 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); 1128 new_smi->last_timeout_jiffies = jiffies; 1129 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); 1130 1131 /* 1132 * Check if the user forcefully enabled the daemon. 1133 */ 1134 if (new_smi->intf_num < num_force_kipmid) 1135 enable = force_kipmid[new_smi->intf_num]; 1136 /* 1137 * The BT interface is efficient enough to not need a thread, 1138 * and there is no need for a thread if we have interrupts. 1139 */ 1140 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) 1141 enable = 1; 1142 1143 if (enable) { 1144 new_smi->thread = kthread_run(ipmi_thread, new_smi, 1145 "kipmi%d", new_smi->intf_num); 1146 if (IS_ERR(new_smi->thread)) { 1147 printk(KERN_NOTICE "ipmi_si_intf: Could not start" 1148 " kernel thread due to error %ld, only using" 1149 " timers to drive the interface\n", 1150 PTR_ERR(new_smi->thread)); 1151 new_smi->thread = NULL; 1152 } 1153 } 1154 1155 return 0; 1156 } 1157 1158 static void set_maintenance_mode(void *send_info, int enable) 1159 { 1160 struct smi_info *smi_info = send_info; 1161 1162 if (!enable) 1163 atomic_set(&smi_info->req_events, 0); 1164 } 1165 1166 static struct ipmi_smi_handlers handlers = { 1167 .owner = THIS_MODULE, 1168 .start_processing = smi_start_processing, 1169 .sender = sender, 1170 .request_events = request_events, 1171 .set_maintenance_mode = set_maintenance_mode, 1172 .set_run_to_completion = set_run_to_completion, 1173 .poll = poll, 1174 }; 1175 1176 /* 1177 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, 1178 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. 1179 */ 1180 1181 static LIST_HEAD(smi_infos); 1182 static DEFINE_MUTEX(smi_infos_lock); 1183 static int smi_num; /* Used to sequence the SMIs */ 1184 1185 #define DEFAULT_REGSPACING 1 1186 #define DEFAULT_REGSIZE 1 1187 1188 static int si_trydefaults = 1; 1189 static char *si_type[SI_MAX_PARMS]; 1190 #define MAX_SI_TYPE_STR 30 1191 static char si_type_str[MAX_SI_TYPE_STR]; 1192 static unsigned long addrs[SI_MAX_PARMS]; 1193 static unsigned int num_addrs; 1194 static unsigned int ports[SI_MAX_PARMS]; 1195 static unsigned int num_ports; 1196 static int irqs[SI_MAX_PARMS]; 1197 static unsigned int num_irqs; 1198 static int regspacings[SI_MAX_PARMS]; 1199 static unsigned int num_regspacings; 1200 static int regsizes[SI_MAX_PARMS]; 1201 static unsigned int num_regsizes; 1202 static int regshifts[SI_MAX_PARMS]; 1203 static unsigned int num_regshifts; 1204 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ 1205 static unsigned int num_slave_addrs; 1206 1207 #define IPMI_IO_ADDR_SPACE 0 1208 #define IPMI_MEM_ADDR_SPACE 1 1209 static char *addr_space_to_str[] = { "i/o", "mem" }; 1210 1211 static int hotmod_handler(const char *val, struct kernel_param *kp); 1212 1213 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); 1214 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" 1215 " Documentation/IPMI.txt in the kernel sources for the" 1216 " gory details."); 1217 1218 module_param_named(trydefaults, si_trydefaults, bool, 0); 1219 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" 1220 " default scan of the KCS and SMIC interface at the standard" 1221 " address"); 1222 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); 1223 MODULE_PARM_DESC(type, "Defines the type of each interface, each" 1224 " interface separated by commas. The types are 'kcs'," 1225 " 'smic', and 'bt'. For example si_type=kcs,bt will set" 1226 " the first interface to kcs and the second to bt"); 1227 module_param_array(addrs, ulong, &num_addrs, 0); 1228 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" 1229 " addresses separated by commas. Only use if an interface" 1230 " is in memory. Otherwise, set it to zero or leave" 1231 " it blank."); 1232 module_param_array(ports, uint, &num_ports, 0); 1233 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" 1234 " addresses separated by commas. Only use if an interface" 1235 " is a port. Otherwise, set it to zero or leave" 1236 " it blank."); 1237 module_param_array(irqs, int, &num_irqs, 0); 1238 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" 1239 " addresses separated by commas. Only use if an interface" 1240 " has an interrupt. Otherwise, set it to zero or leave" 1241 " it blank."); 1242 module_param_array(regspacings, int, &num_regspacings, 0); 1243 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" 1244 " and each successive register used by the interface. For" 1245 " instance, if the start address is 0xca2 and the spacing" 1246 " is 2, then the second address is at 0xca4. Defaults" 1247 " to 1."); 1248 module_param_array(regsizes, int, &num_regsizes, 0); 1249 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." 1250 " This should generally be 1, 2, 4, or 8 for an 8-bit," 1251 " 16-bit, 32-bit, or 64-bit register. Use this if you" 1252 " the 8-bit IPMI register has to be read from a larger" 1253 " register."); 1254 module_param_array(regshifts, int, &num_regshifts, 0); 1255 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." 1256 " IPMI register, in bits. For instance, if the data" 1257 " is read from a 32-bit word and the IPMI data is in" 1258 " bit 8-15, then the shift would be 8"); 1259 module_param_array(slave_addrs, int, &num_slave_addrs, 0); 1260 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" 1261 " the controller. Normally this is 0x20, but can be" 1262 " overridden by this parm. This is an array indexed" 1263 " by interface number."); 1264 module_param_array(force_kipmid, int, &num_force_kipmid, 0); 1265 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" 1266 " disabled(0). Normally the IPMI driver auto-detects" 1267 " this, but the value may be overridden by this parm."); 1268 module_param(unload_when_empty, int, 0); 1269 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" 1270 " specified or found, default is 1. Setting to 0" 1271 " is useful for hot add of devices using hotmod."); 1272 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); 1273 MODULE_PARM_DESC(kipmid_max_busy_us, 1274 "Max time (in microseconds) to busy-wait for IPMI data before" 1275 " sleeping. 0 (default) means to wait forever. Set to 100-500" 1276 " if kipmid is using up a lot of CPU time."); 1277 1278 1279 static void std_irq_cleanup(struct smi_info *info) 1280 { 1281 if (info->si_type == SI_BT) 1282 /* Disable the interrupt in the BT interface. */ 1283 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); 1284 free_irq(info->irq, info); 1285 } 1286 1287 static int std_irq_setup(struct smi_info *info) 1288 { 1289 int rv; 1290 1291 if (!info->irq) 1292 return 0; 1293 1294 if (info->si_type == SI_BT) { 1295 rv = request_irq(info->irq, 1296 si_bt_irq_handler, 1297 IRQF_SHARED | IRQF_DISABLED, 1298 DEVICE_NAME, 1299 info); 1300 if (!rv) 1301 /* Enable the interrupt in the BT interface. */ 1302 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 1303 IPMI_BT_INTMASK_ENABLE_IRQ_BIT); 1304 } else 1305 rv = request_irq(info->irq, 1306 si_irq_handler, 1307 IRQF_SHARED | IRQF_DISABLED, 1308 DEVICE_NAME, 1309 info); 1310 if (rv) { 1311 printk(KERN_WARNING 1312 "ipmi_si: %s unable to claim interrupt %d," 1313 " running polled\n", 1314 DEVICE_NAME, info->irq); 1315 info->irq = 0; 1316 } else { 1317 info->irq_cleanup = std_irq_cleanup; 1318 printk(" Using irq %d\n", info->irq); 1319 } 1320 1321 return rv; 1322 } 1323 1324 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) 1325 { 1326 unsigned int addr = io->addr_data; 1327 1328 return inb(addr + (offset * io->regspacing)); 1329 } 1330 1331 static void port_outb(struct si_sm_io *io, unsigned int offset, 1332 unsigned char b) 1333 { 1334 unsigned int addr = io->addr_data; 1335 1336 outb(b, addr + (offset * io->regspacing)); 1337 } 1338 1339 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) 1340 { 1341 unsigned int addr = io->addr_data; 1342 1343 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; 1344 } 1345 1346 static void port_outw(struct si_sm_io *io, unsigned int offset, 1347 unsigned char b) 1348 { 1349 unsigned int addr = io->addr_data; 1350 1351 outw(b << io->regshift, addr + (offset * io->regspacing)); 1352 } 1353 1354 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) 1355 { 1356 unsigned int addr = io->addr_data; 1357 1358 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; 1359 } 1360 1361 static void port_outl(struct si_sm_io *io, unsigned int offset, 1362 unsigned char b) 1363 { 1364 unsigned int addr = io->addr_data; 1365 1366 outl(b << io->regshift, addr+(offset * io->regspacing)); 1367 } 1368 1369 static void port_cleanup(struct smi_info *info) 1370 { 1371 unsigned int addr = info->io.addr_data; 1372 int idx; 1373 1374 if (addr) { 1375 for (idx = 0; idx < info->io_size; idx++) 1376 release_region(addr + idx * info->io.regspacing, 1377 info->io.regsize); 1378 } 1379 } 1380 1381 static int port_setup(struct smi_info *info) 1382 { 1383 unsigned int addr = info->io.addr_data; 1384 int idx; 1385 1386 if (!addr) 1387 return -ENODEV; 1388 1389 info->io_cleanup = port_cleanup; 1390 1391 /* 1392 * Figure out the actual inb/inw/inl/etc routine to use based 1393 * upon the register size. 1394 */ 1395 switch (info->io.regsize) { 1396 case 1: 1397 info->io.inputb = port_inb; 1398 info->io.outputb = port_outb; 1399 break; 1400 case 2: 1401 info->io.inputb = port_inw; 1402 info->io.outputb = port_outw; 1403 break; 1404 case 4: 1405 info->io.inputb = port_inl; 1406 info->io.outputb = port_outl; 1407 break; 1408 default: 1409 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", 1410 info->io.regsize); 1411 return -EINVAL; 1412 } 1413 1414 /* 1415 * Some BIOSes reserve disjoint I/O regions in their ACPI 1416 * tables. This causes problems when trying to register the 1417 * entire I/O region. Therefore we must register each I/O 1418 * port separately. 1419 */ 1420 for (idx = 0; idx < info->io_size; idx++) { 1421 if (request_region(addr + idx * info->io.regspacing, 1422 info->io.regsize, DEVICE_NAME) == NULL) { 1423 /* Undo allocations */ 1424 while (idx--) { 1425 release_region(addr + idx * info->io.regspacing, 1426 info->io.regsize); 1427 } 1428 return -EIO; 1429 } 1430 } 1431 return 0; 1432 } 1433 1434 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) 1435 { 1436 return readb((io->addr)+(offset * io->regspacing)); 1437 } 1438 1439 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, 1440 unsigned char b) 1441 { 1442 writeb(b, (io->addr)+(offset * io->regspacing)); 1443 } 1444 1445 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) 1446 { 1447 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) 1448 & 0xff; 1449 } 1450 1451 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, 1452 unsigned char b) 1453 { 1454 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); 1455 } 1456 1457 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) 1458 { 1459 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) 1460 & 0xff; 1461 } 1462 1463 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, 1464 unsigned char b) 1465 { 1466 writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); 1467 } 1468 1469 #ifdef readq 1470 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) 1471 { 1472 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) 1473 & 0xff; 1474 } 1475 1476 static void mem_outq(struct si_sm_io *io, unsigned int offset, 1477 unsigned char b) 1478 { 1479 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); 1480 } 1481 #endif 1482 1483 static void mem_cleanup(struct smi_info *info) 1484 { 1485 unsigned long addr = info->io.addr_data; 1486 int mapsize; 1487 1488 if (info->io.addr) { 1489 iounmap(info->io.addr); 1490 1491 mapsize = ((info->io_size * info->io.regspacing) 1492 - (info->io.regspacing - info->io.regsize)); 1493 1494 release_mem_region(addr, mapsize); 1495 } 1496 } 1497 1498 static int mem_setup(struct smi_info *info) 1499 { 1500 unsigned long addr = info->io.addr_data; 1501 int mapsize; 1502 1503 if (!addr) 1504 return -ENODEV; 1505 1506 info->io_cleanup = mem_cleanup; 1507 1508 /* 1509 * Figure out the actual readb/readw/readl/etc routine to use based 1510 * upon the register size. 1511 */ 1512 switch (info->io.regsize) { 1513 case 1: 1514 info->io.inputb = intf_mem_inb; 1515 info->io.outputb = intf_mem_outb; 1516 break; 1517 case 2: 1518 info->io.inputb = intf_mem_inw; 1519 info->io.outputb = intf_mem_outw; 1520 break; 1521 case 4: 1522 info->io.inputb = intf_mem_inl; 1523 info->io.outputb = intf_mem_outl; 1524 break; 1525 #ifdef readq 1526 case 8: 1527 info->io.inputb = mem_inq; 1528 info->io.outputb = mem_outq; 1529 break; 1530 #endif 1531 default: 1532 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", 1533 info->io.regsize); 1534 return -EINVAL; 1535 } 1536 1537 /* 1538 * Calculate the total amount of memory to claim. This is an 1539 * unusual looking calculation, but it avoids claiming any 1540 * more memory than it has to. It will claim everything 1541 * between the first address to the end of the last full 1542 * register. 1543 */ 1544 mapsize = ((info->io_size * info->io.regspacing) 1545 - (info->io.regspacing - info->io.regsize)); 1546 1547 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) 1548 return -EIO; 1549 1550 info->io.addr = ioremap(addr, mapsize); 1551 if (info->io.addr == NULL) { 1552 release_mem_region(addr, mapsize); 1553 return -EIO; 1554 } 1555 return 0; 1556 } 1557 1558 /* 1559 * Parms come in as <op1>[:op2[:op3...]]. ops are: 1560 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] 1561 * Options are: 1562 * rsp=<regspacing> 1563 * rsi=<regsize> 1564 * rsh=<regshift> 1565 * irq=<irq> 1566 * ipmb=<ipmb addr> 1567 */ 1568 enum hotmod_op { HM_ADD, HM_REMOVE }; 1569 struct hotmod_vals { 1570 char *name; 1571 int val; 1572 }; 1573 static struct hotmod_vals hotmod_ops[] = { 1574 { "add", HM_ADD }, 1575 { "remove", HM_REMOVE }, 1576 { NULL } 1577 }; 1578 static struct hotmod_vals hotmod_si[] = { 1579 { "kcs", SI_KCS }, 1580 { "smic", SI_SMIC }, 1581 { "bt", SI_BT }, 1582 { NULL } 1583 }; 1584 static struct hotmod_vals hotmod_as[] = { 1585 { "mem", IPMI_MEM_ADDR_SPACE }, 1586 { "i/o", IPMI_IO_ADDR_SPACE }, 1587 { NULL } 1588 }; 1589 1590 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) 1591 { 1592 char *s; 1593 int i; 1594 1595 s = strchr(*curr, ','); 1596 if (!s) { 1597 printk(KERN_WARNING PFX "No hotmod %s given.\n", name); 1598 return -EINVAL; 1599 } 1600 *s = '\0'; 1601 s++; 1602 for (i = 0; hotmod_ops[i].name; i++) { 1603 if (strcmp(*curr, v[i].name) == 0) { 1604 *val = v[i].val; 1605 *curr = s; 1606 return 0; 1607 } 1608 } 1609 1610 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); 1611 return -EINVAL; 1612 } 1613 1614 static int check_hotmod_int_op(const char *curr, const char *option, 1615 const char *name, int *val) 1616 { 1617 char *n; 1618 1619 if (strcmp(curr, name) == 0) { 1620 if (!option) { 1621 printk(KERN_WARNING PFX 1622 "No option given for '%s'\n", 1623 curr); 1624 return -EINVAL; 1625 } 1626 *val = simple_strtoul(option, &n, 0); 1627 if ((*n != '\0') || (*option == '\0')) { 1628 printk(KERN_WARNING PFX 1629 "Bad option given for '%s'\n", 1630 curr); 1631 return -EINVAL; 1632 } 1633 return 1; 1634 } 1635 return 0; 1636 } 1637 1638 static int hotmod_handler(const char *val, struct kernel_param *kp) 1639 { 1640 char *str = kstrdup(val, GFP_KERNEL); 1641 int rv; 1642 char *next, *curr, *s, *n, *o; 1643 enum hotmod_op op; 1644 enum si_type si_type; 1645 int addr_space; 1646 unsigned long addr; 1647 int regspacing; 1648 int regsize; 1649 int regshift; 1650 int irq; 1651 int ipmb; 1652 int ival; 1653 int len; 1654 struct smi_info *info; 1655 1656 if (!str) 1657 return -ENOMEM; 1658 1659 /* Kill any trailing spaces, as we can get a "\n" from echo. */ 1660 len = strlen(str); 1661 ival = len - 1; 1662 while ((ival >= 0) && isspace(str[ival])) { 1663 str[ival] = '\0'; 1664 ival--; 1665 } 1666 1667 for (curr = str; curr; curr = next) { 1668 regspacing = 1; 1669 regsize = 1; 1670 regshift = 0; 1671 irq = 0; 1672 ipmb = 0; /* Choose the default if not specified */ 1673 1674 next = strchr(curr, ':'); 1675 if (next) { 1676 *next = '\0'; 1677 next++; 1678 } 1679 1680 rv = parse_str(hotmod_ops, &ival, "operation", &curr); 1681 if (rv) 1682 break; 1683 op = ival; 1684 1685 rv = parse_str(hotmod_si, &ival, "interface type", &curr); 1686 if (rv) 1687 break; 1688 si_type = ival; 1689 1690 rv = parse_str(hotmod_as, &addr_space, "address space", &curr); 1691 if (rv) 1692 break; 1693 1694 s = strchr(curr, ','); 1695 if (s) { 1696 *s = '\0'; 1697 s++; 1698 } 1699 addr = simple_strtoul(curr, &n, 0); 1700 if ((*n != '\0') || (*curr == '\0')) { 1701 printk(KERN_WARNING PFX "Invalid hotmod address" 1702 " '%s'\n", curr); 1703 break; 1704 } 1705 1706 while (s) { 1707 curr = s; 1708 s = strchr(curr, ','); 1709 if (s) { 1710 *s = '\0'; 1711 s++; 1712 } 1713 o = strchr(curr, '='); 1714 if (o) { 1715 *o = '\0'; 1716 o++; 1717 } 1718 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); 1719 if (rv < 0) 1720 goto out; 1721 else if (rv) 1722 continue; 1723 rv = check_hotmod_int_op(curr, o, "rsi", ®size); 1724 if (rv < 0) 1725 goto out; 1726 else if (rv) 1727 continue; 1728 rv = check_hotmod_int_op(curr, o, "rsh", ®shift); 1729 if (rv < 0) 1730 goto out; 1731 else if (rv) 1732 continue; 1733 rv = check_hotmod_int_op(curr, o, "irq", &irq); 1734 if (rv < 0) 1735 goto out; 1736 else if (rv) 1737 continue; 1738 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); 1739 if (rv < 0) 1740 goto out; 1741 else if (rv) 1742 continue; 1743 1744 rv = -EINVAL; 1745 printk(KERN_WARNING PFX 1746 "Invalid hotmod option '%s'\n", 1747 curr); 1748 goto out; 1749 } 1750 1751 if (op == HM_ADD) { 1752 info = kzalloc(sizeof(*info), GFP_KERNEL); 1753 if (!info) { 1754 rv = -ENOMEM; 1755 goto out; 1756 } 1757 1758 info->addr_source = "hotmod"; 1759 info->si_type = si_type; 1760 info->io.addr_data = addr; 1761 info->io.addr_type = addr_space; 1762 if (addr_space == IPMI_MEM_ADDR_SPACE) 1763 info->io_setup = mem_setup; 1764 else 1765 info->io_setup = port_setup; 1766 1767 info->io.addr = NULL; 1768 info->io.regspacing = regspacing; 1769 if (!info->io.regspacing) 1770 info->io.regspacing = DEFAULT_REGSPACING; 1771 info->io.regsize = regsize; 1772 if (!info->io.regsize) 1773 info->io.regsize = DEFAULT_REGSPACING; 1774 info->io.regshift = regshift; 1775 info->irq = irq; 1776 if (info->irq) 1777 info->irq_setup = std_irq_setup; 1778 info->slave_addr = ipmb; 1779 1780 try_smi_init(info); 1781 } else { 1782 /* remove */ 1783 struct smi_info *e, *tmp_e; 1784 1785 mutex_lock(&smi_infos_lock); 1786 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { 1787 if (e->io.addr_type != addr_space) 1788 continue; 1789 if (e->si_type != si_type) 1790 continue; 1791 if (e->io.addr_data == addr) 1792 cleanup_one_si(e); 1793 } 1794 mutex_unlock(&smi_infos_lock); 1795 } 1796 } 1797 rv = len; 1798 out: 1799 kfree(str); 1800 return rv; 1801 } 1802 1803 static __devinit void hardcode_find_bmc(void) 1804 { 1805 int i; 1806 struct smi_info *info; 1807 1808 for (i = 0; i < SI_MAX_PARMS; i++) { 1809 if (!ports[i] && !addrs[i]) 1810 continue; 1811 1812 info = kzalloc(sizeof(*info), GFP_KERNEL); 1813 if (!info) 1814 return; 1815 1816 info->addr_source = "hardcoded"; 1817 1818 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { 1819 info->si_type = SI_KCS; 1820 } else if (strcmp(si_type[i], "smic") == 0) { 1821 info->si_type = SI_SMIC; 1822 } else if (strcmp(si_type[i], "bt") == 0) { 1823 info->si_type = SI_BT; 1824 } else { 1825 printk(KERN_WARNING 1826 "ipmi_si: Interface type specified " 1827 "for interface %d, was invalid: %s\n", 1828 i, si_type[i]); 1829 kfree(info); 1830 continue; 1831 } 1832 1833 if (ports[i]) { 1834 /* An I/O port */ 1835 info->io_setup = port_setup; 1836 info->io.addr_data = ports[i]; 1837 info->io.addr_type = IPMI_IO_ADDR_SPACE; 1838 } else if (addrs[i]) { 1839 /* A memory port */ 1840 info->io_setup = mem_setup; 1841 info->io.addr_data = addrs[i]; 1842 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 1843 } else { 1844 printk(KERN_WARNING 1845 "ipmi_si: Interface type specified " 1846 "for interface %d, " 1847 "but port and address were not set or " 1848 "set to zero.\n", i); 1849 kfree(info); 1850 continue; 1851 } 1852 1853 info->io.addr = NULL; 1854 info->io.regspacing = regspacings[i]; 1855 if (!info->io.regspacing) 1856 info->io.regspacing = DEFAULT_REGSPACING; 1857 info->io.regsize = regsizes[i]; 1858 if (!info->io.regsize) 1859 info->io.regsize = DEFAULT_REGSPACING; 1860 info->io.regshift = regshifts[i]; 1861 info->irq = irqs[i]; 1862 if (info->irq) 1863 info->irq_setup = std_irq_setup; 1864 info->slave_addr = slave_addrs[i]; 1865 1866 try_smi_init(info); 1867 } 1868 } 1869 1870 #ifdef CONFIG_ACPI 1871 1872 #include <linux/acpi.h> 1873 1874 /* 1875 * Once we get an ACPI failure, we don't try any more, because we go 1876 * through the tables sequentially. Once we don't find a table, there 1877 * are no more. 1878 */ 1879 static int acpi_failure; 1880 1881 /* For GPE-type interrupts. */ 1882 static u32 ipmi_acpi_gpe(void *context) 1883 { 1884 struct smi_info *smi_info = context; 1885 unsigned long flags; 1886 #ifdef DEBUG_TIMING 1887 struct timeval t; 1888 #endif 1889 1890 spin_lock_irqsave(&(smi_info->si_lock), flags); 1891 1892 smi_inc_stat(smi_info, interrupts); 1893 1894 #ifdef DEBUG_TIMING 1895 do_gettimeofday(&t); 1896 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); 1897 #endif 1898 smi_event_handler(smi_info, 0); 1899 spin_unlock_irqrestore(&(smi_info->si_lock), flags); 1900 1901 return ACPI_INTERRUPT_HANDLED; 1902 } 1903 1904 static void acpi_gpe_irq_cleanup(struct smi_info *info) 1905 { 1906 if (!info->irq) 1907 return; 1908 1909 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); 1910 } 1911 1912 static int acpi_gpe_irq_setup(struct smi_info *info) 1913 { 1914 acpi_status status; 1915 1916 if (!info->irq) 1917 return 0; 1918 1919 /* FIXME - is level triggered right? */ 1920 status = acpi_install_gpe_handler(NULL, 1921 info->irq, 1922 ACPI_GPE_LEVEL_TRIGGERED, 1923 &ipmi_acpi_gpe, 1924 info); 1925 if (status != AE_OK) { 1926 printk(KERN_WARNING 1927 "ipmi_si: %s unable to claim ACPI GPE %d," 1928 " running polled\n", 1929 DEVICE_NAME, info->irq); 1930 info->irq = 0; 1931 return -EINVAL; 1932 } else { 1933 info->irq_cleanup = acpi_gpe_irq_cleanup; 1934 printk(" Using ACPI GPE %d\n", info->irq); 1935 return 0; 1936 } 1937 } 1938 1939 /* 1940 * Defined at 1941 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/ 1942 * Docs/TechPapers/IA64/hpspmi.pdf 1943 */ 1944 struct SPMITable { 1945 s8 Signature[4]; 1946 u32 Length; 1947 u8 Revision; 1948 u8 Checksum; 1949 s8 OEMID[6]; 1950 s8 OEMTableID[8]; 1951 s8 OEMRevision[4]; 1952 s8 CreatorID[4]; 1953 s8 CreatorRevision[4]; 1954 u8 InterfaceType; 1955 u8 IPMIlegacy; 1956 s16 SpecificationRevision; 1957 1958 /* 1959 * Bit 0 - SCI interrupt supported 1960 * Bit 1 - I/O APIC/SAPIC 1961 */ 1962 u8 InterruptType; 1963 1964 /* 1965 * If bit 0 of InterruptType is set, then this is the SCI 1966 * interrupt in the GPEx_STS register. 1967 */ 1968 u8 GPE; 1969 1970 s16 Reserved; 1971 1972 /* 1973 * If bit 1 of InterruptType is set, then this is the I/O 1974 * APIC/SAPIC interrupt. 1975 */ 1976 u32 GlobalSystemInterrupt; 1977 1978 /* The actual register address. */ 1979 struct acpi_generic_address addr; 1980 1981 u8 UID[4]; 1982 1983 s8 spmi_id[1]; /* A '\0' terminated array starts here. */ 1984 }; 1985 1986 static __devinit int try_init_spmi(struct SPMITable *spmi) 1987 { 1988 struct smi_info *info; 1989 u8 addr_space; 1990 1991 if (spmi->IPMIlegacy != 1) { 1992 printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); 1993 return -ENODEV; 1994 } 1995 1996 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) 1997 addr_space = IPMI_MEM_ADDR_SPACE; 1998 else 1999 addr_space = IPMI_IO_ADDR_SPACE; 2000 2001 info = kzalloc(sizeof(*info), GFP_KERNEL); 2002 if (!info) { 2003 printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); 2004 return -ENOMEM; 2005 } 2006 2007 info->addr_source = "SPMI"; 2008 2009 /* Figure out the interface type. */ 2010 switch (spmi->InterfaceType) { 2011 case 1: /* KCS */ 2012 info->si_type = SI_KCS; 2013 break; 2014 case 2: /* SMIC */ 2015 info->si_type = SI_SMIC; 2016 break; 2017 case 3: /* BT */ 2018 info->si_type = SI_BT; 2019 break; 2020 default: 2021 printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", 2022 spmi->InterfaceType); 2023 kfree(info); 2024 return -EIO; 2025 } 2026 2027 if (spmi->InterruptType & 1) { 2028 /* We've got a GPE interrupt. */ 2029 info->irq = spmi->GPE; 2030 info->irq_setup = acpi_gpe_irq_setup; 2031 } else if (spmi->InterruptType & 2) { 2032 /* We've got an APIC/SAPIC interrupt. */ 2033 info->irq = spmi->GlobalSystemInterrupt; 2034 info->irq_setup = std_irq_setup; 2035 } else { 2036 /* Use the default interrupt setting. */ 2037 info->irq = 0; 2038 info->irq_setup = NULL; 2039 } 2040 2041 if (spmi->addr.bit_width) { 2042 /* A (hopefully) properly formed register bit width. */ 2043 info->io.regspacing = spmi->addr.bit_width / 8; 2044 } else { 2045 info->io.regspacing = DEFAULT_REGSPACING; 2046 } 2047 info->io.regsize = info->io.regspacing; 2048 info->io.regshift = spmi->addr.bit_offset; 2049 2050 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { 2051 info->io_setup = mem_setup; 2052 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 2053 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { 2054 info->io_setup = port_setup; 2055 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2056 } else { 2057 kfree(info); 2058 printk(KERN_WARNING 2059 "ipmi_si: Unknown ACPI I/O Address type\n"); 2060 return -EIO; 2061 } 2062 info->io.addr_data = spmi->addr.address; 2063 2064 try_smi_init(info); 2065 2066 return 0; 2067 } 2068 2069 static __devinit void spmi_find_bmc(void) 2070 { 2071 acpi_status status; 2072 struct SPMITable *spmi; 2073 int i; 2074 2075 if (acpi_disabled) 2076 return; 2077 2078 if (acpi_failure) 2079 return; 2080 2081 for (i = 0; ; i++) { 2082 status = acpi_get_table(ACPI_SIG_SPMI, i+1, 2083 (struct acpi_table_header **)&spmi); 2084 if (status != AE_OK) 2085 return; 2086 2087 try_init_spmi(spmi); 2088 } 2089 } 2090 2091 static int __devinit ipmi_pnp_probe(struct pnp_dev *dev, 2092 const struct pnp_device_id *dev_id) 2093 { 2094 struct acpi_device *acpi_dev; 2095 struct smi_info *info; 2096 acpi_handle handle; 2097 acpi_status status; 2098 unsigned long long tmp; 2099 2100 acpi_dev = pnp_acpi_device(dev); 2101 if (!acpi_dev) 2102 return -ENODEV; 2103 2104 info = kzalloc(sizeof(*info), GFP_KERNEL); 2105 if (!info) 2106 return -ENOMEM; 2107 2108 info->addr_source = "ACPI"; 2109 2110 handle = acpi_dev->handle; 2111 2112 /* _IFT tells us the interface type: KCS, BT, etc */ 2113 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); 2114 if (ACPI_FAILURE(status)) 2115 goto err_free; 2116 2117 switch (tmp) { 2118 case 1: 2119 info->si_type = SI_KCS; 2120 break; 2121 case 2: 2122 info->si_type = SI_SMIC; 2123 break; 2124 case 3: 2125 info->si_type = SI_BT; 2126 break; 2127 default: 2128 dev_info(&dev->dev, "unknown interface type %lld\n", tmp); 2129 goto err_free; 2130 } 2131 2132 if (pnp_port_valid(dev, 0)) { 2133 info->io_setup = port_setup; 2134 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2135 info->io.addr_data = pnp_port_start(dev, 0); 2136 } else if (pnp_mem_valid(dev, 0)) { 2137 info->io_setup = mem_setup; 2138 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 2139 info->io.addr_data = pnp_mem_start(dev, 0); 2140 } else { 2141 dev_err(&dev->dev, "no I/O or memory address\n"); 2142 goto err_free; 2143 } 2144 2145 info->io.regspacing = DEFAULT_REGSPACING; 2146 info->io.regsize = DEFAULT_REGSPACING; 2147 info->io.regshift = 0; 2148 2149 /* If _GPE exists, use it; otherwise use standard interrupts */ 2150 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); 2151 if (ACPI_SUCCESS(status)) { 2152 info->irq = tmp; 2153 info->irq_setup = acpi_gpe_irq_setup; 2154 } else if (pnp_irq_valid(dev, 0)) { 2155 info->irq = pnp_irq(dev, 0); 2156 info->irq_setup = std_irq_setup; 2157 } 2158 2159 info->dev = &acpi_dev->dev; 2160 pnp_set_drvdata(dev, info); 2161 2162 return try_smi_init(info); 2163 2164 err_free: 2165 kfree(info); 2166 return -EINVAL; 2167 } 2168 2169 static void __devexit ipmi_pnp_remove(struct pnp_dev *dev) 2170 { 2171 struct smi_info *info = pnp_get_drvdata(dev); 2172 2173 cleanup_one_si(info); 2174 } 2175 2176 static const struct pnp_device_id pnp_dev_table[] = { 2177 {"IPI0001", 0}, 2178 {"", 0}, 2179 }; 2180 2181 static struct pnp_driver ipmi_pnp_driver = { 2182 .name = DEVICE_NAME, 2183 .probe = ipmi_pnp_probe, 2184 .remove = __devexit_p(ipmi_pnp_remove), 2185 .id_table = pnp_dev_table, 2186 }; 2187 #endif 2188 2189 #ifdef CONFIG_DMI 2190 struct dmi_ipmi_data { 2191 u8 type; 2192 u8 addr_space; 2193 unsigned long base_addr; 2194 u8 irq; 2195 u8 offset; 2196 u8 slave_addr; 2197 }; 2198 2199 static int __devinit decode_dmi(const struct dmi_header *dm, 2200 struct dmi_ipmi_data *dmi) 2201 { 2202 const u8 *data = (const u8 *)dm; 2203 unsigned long base_addr; 2204 u8 reg_spacing; 2205 u8 len = dm->length; 2206 2207 dmi->type = data[4]; 2208 2209 memcpy(&base_addr, data+8, sizeof(unsigned long)); 2210 if (len >= 0x11) { 2211 if (base_addr & 1) { 2212 /* I/O */ 2213 base_addr &= 0xFFFE; 2214 dmi->addr_space = IPMI_IO_ADDR_SPACE; 2215 } else 2216 /* Memory */ 2217 dmi->addr_space = IPMI_MEM_ADDR_SPACE; 2218 2219 /* If bit 4 of byte 0x10 is set, then the lsb for the address 2220 is odd. */ 2221 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); 2222 2223 dmi->irq = data[0x11]; 2224 2225 /* The top two bits of byte 0x10 hold the register spacing. */ 2226 reg_spacing = (data[0x10] & 0xC0) >> 6; 2227 switch (reg_spacing) { 2228 case 0x00: /* Byte boundaries */ 2229 dmi->offset = 1; 2230 break; 2231 case 0x01: /* 32-bit boundaries */ 2232 dmi->offset = 4; 2233 break; 2234 case 0x02: /* 16-byte boundaries */ 2235 dmi->offset = 16; 2236 break; 2237 default: 2238 /* Some other interface, just ignore it. */ 2239 return -EIO; 2240 } 2241 } else { 2242 /* Old DMI spec. */ 2243 /* 2244 * Note that technically, the lower bit of the base 2245 * address should be 1 if the address is I/O and 0 if 2246 * the address is in memory. So many systems get that 2247 * wrong (and all that I have seen are I/O) so we just 2248 * ignore that bit and assume I/O. Systems that use 2249 * memory should use the newer spec, anyway. 2250 */ 2251 dmi->base_addr = base_addr & 0xfffe; 2252 dmi->addr_space = IPMI_IO_ADDR_SPACE; 2253 dmi->offset = 1; 2254 } 2255 2256 dmi->slave_addr = data[6]; 2257 2258 return 0; 2259 } 2260 2261 static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) 2262 { 2263 struct smi_info *info; 2264 2265 info = kzalloc(sizeof(*info), GFP_KERNEL); 2266 if (!info) { 2267 printk(KERN_ERR 2268 "ipmi_si: Could not allocate SI data\n"); 2269 return; 2270 } 2271 2272 info->addr_source = "SMBIOS"; 2273 2274 switch (ipmi_data->type) { 2275 case 0x01: /* KCS */ 2276 info->si_type = SI_KCS; 2277 break; 2278 case 0x02: /* SMIC */ 2279 info->si_type = SI_SMIC; 2280 break; 2281 case 0x03: /* BT */ 2282 info->si_type = SI_BT; 2283 break; 2284 default: 2285 kfree(info); 2286 return; 2287 } 2288 2289 switch (ipmi_data->addr_space) { 2290 case IPMI_MEM_ADDR_SPACE: 2291 info->io_setup = mem_setup; 2292 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 2293 break; 2294 2295 case IPMI_IO_ADDR_SPACE: 2296 info->io_setup = port_setup; 2297 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2298 break; 2299 2300 default: 2301 kfree(info); 2302 printk(KERN_WARNING 2303 "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", 2304 ipmi_data->addr_space); 2305 return; 2306 } 2307 info->io.addr_data = ipmi_data->base_addr; 2308 2309 info->io.regspacing = ipmi_data->offset; 2310 if (!info->io.regspacing) 2311 info->io.regspacing = DEFAULT_REGSPACING; 2312 info->io.regsize = DEFAULT_REGSPACING; 2313 info->io.regshift = 0; 2314 2315 info->slave_addr = ipmi_data->slave_addr; 2316 2317 info->irq = ipmi_data->irq; 2318 if (info->irq) 2319 info->irq_setup = std_irq_setup; 2320 2321 try_smi_init(info); 2322 } 2323 2324 static void __devinit dmi_find_bmc(void) 2325 { 2326 const struct dmi_device *dev = NULL; 2327 struct dmi_ipmi_data data; 2328 int rv; 2329 2330 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { 2331 memset(&data, 0, sizeof(data)); 2332 rv = decode_dmi((const struct dmi_header *) dev->device_data, 2333 &data); 2334 if (!rv) 2335 try_init_dmi(&data); 2336 } 2337 } 2338 #endif /* CONFIG_DMI */ 2339 2340 #ifdef CONFIG_PCI 2341 2342 #define PCI_ERMC_CLASSCODE 0x0C0700 2343 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 2344 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff 2345 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 2346 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 2347 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 2348 2349 #define PCI_HP_VENDOR_ID 0x103C 2350 #define PCI_MMC_DEVICE_ID 0x121A 2351 #define PCI_MMC_ADDR_CW 0x10 2352 2353 static void ipmi_pci_cleanup(struct smi_info *info) 2354 { 2355 struct pci_dev *pdev = info->addr_source_data; 2356 2357 pci_disable_device(pdev); 2358 } 2359 2360 static int __devinit ipmi_pci_probe(struct pci_dev *pdev, 2361 const struct pci_device_id *ent) 2362 { 2363 int rv; 2364 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; 2365 struct smi_info *info; 2366 2367 info = kzalloc(sizeof(*info), GFP_KERNEL); 2368 if (!info) 2369 return -ENOMEM; 2370 2371 info->addr_source = "PCI"; 2372 2373 switch (class_type) { 2374 case PCI_ERMC_CLASSCODE_TYPE_SMIC: 2375 info->si_type = SI_SMIC; 2376 break; 2377 2378 case PCI_ERMC_CLASSCODE_TYPE_KCS: 2379 info->si_type = SI_KCS; 2380 break; 2381 2382 case PCI_ERMC_CLASSCODE_TYPE_BT: 2383 info->si_type = SI_BT; 2384 break; 2385 2386 default: 2387 kfree(info); 2388 printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", 2389 pci_name(pdev), class_type); 2390 return -ENOMEM; 2391 } 2392 2393 rv = pci_enable_device(pdev); 2394 if (rv) { 2395 printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", 2396 pci_name(pdev)); 2397 kfree(info); 2398 return rv; 2399 } 2400 2401 info->addr_source_cleanup = ipmi_pci_cleanup; 2402 info->addr_source_data = pdev; 2403 2404 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { 2405 info->io_setup = port_setup; 2406 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2407 } else { 2408 info->io_setup = mem_setup; 2409 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 2410 } 2411 info->io.addr_data = pci_resource_start(pdev, 0); 2412 2413 info->io.regspacing = DEFAULT_REGSPACING; 2414 info->io.regsize = DEFAULT_REGSPACING; 2415 info->io.regshift = 0; 2416 2417 info->irq = pdev->irq; 2418 if (info->irq) 2419 info->irq_setup = std_irq_setup; 2420 2421 info->dev = &pdev->dev; 2422 pci_set_drvdata(pdev, info); 2423 2424 return try_smi_init(info); 2425 } 2426 2427 static void __devexit ipmi_pci_remove(struct pci_dev *pdev) 2428 { 2429 struct smi_info *info = pci_get_drvdata(pdev); 2430 cleanup_one_si(info); 2431 } 2432 2433 #ifdef CONFIG_PM 2434 static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) 2435 { 2436 return 0; 2437 } 2438 2439 static int ipmi_pci_resume(struct pci_dev *pdev) 2440 { 2441 return 0; 2442 } 2443 #endif 2444 2445 static struct pci_device_id ipmi_pci_devices[] = { 2446 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, 2447 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, 2448 { 0, } 2449 }; 2450 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); 2451 2452 static struct pci_driver ipmi_pci_driver = { 2453 .name = DEVICE_NAME, 2454 .id_table = ipmi_pci_devices, 2455 .probe = ipmi_pci_probe, 2456 .remove = __devexit_p(ipmi_pci_remove), 2457 #ifdef CONFIG_PM 2458 .suspend = ipmi_pci_suspend, 2459 .resume = ipmi_pci_resume, 2460 #endif 2461 }; 2462 #endif /* CONFIG_PCI */ 2463 2464 2465 #ifdef CONFIG_PPC_OF 2466 static int __devinit ipmi_of_probe(struct of_device *dev, 2467 const struct of_device_id *match) 2468 { 2469 struct smi_info *info; 2470 struct resource resource; 2471 const int *regsize, *regspacing, *regshift; 2472 struct device_node *np = dev->node; 2473 int ret; 2474 int proplen; 2475 2476 dev_info(&dev->dev, PFX "probing via device tree\n"); 2477 2478 ret = of_address_to_resource(np, 0, &resource); 2479 if (ret) { 2480 dev_warn(&dev->dev, PFX "invalid address from OF\n"); 2481 return ret; 2482 } 2483 2484 regsize = of_get_property(np, "reg-size", &proplen); 2485 if (regsize && proplen != 4) { 2486 dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); 2487 return -EINVAL; 2488 } 2489 2490 regspacing = of_get_property(np, "reg-spacing", &proplen); 2491 if (regspacing && proplen != 4) { 2492 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); 2493 return -EINVAL; 2494 } 2495 2496 regshift = of_get_property(np, "reg-shift", &proplen); 2497 if (regshift && proplen != 4) { 2498 dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); 2499 return -EINVAL; 2500 } 2501 2502 info = kzalloc(sizeof(*info), GFP_KERNEL); 2503 2504 if (!info) { 2505 dev_err(&dev->dev, 2506 PFX "could not allocate memory for OF probe\n"); 2507 return -ENOMEM; 2508 } 2509 2510 info->si_type = (enum si_type) match->data; 2511 info->addr_source = "device-tree"; 2512 info->irq_setup = std_irq_setup; 2513 2514 if (resource.flags & IORESOURCE_IO) { 2515 info->io_setup = port_setup; 2516 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2517 } else { 2518 info->io_setup = mem_setup; 2519 info->io.addr_type = IPMI_MEM_ADDR_SPACE; 2520 } 2521 2522 info->io.addr_data = resource.start; 2523 2524 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE; 2525 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING; 2526 info->io.regshift = regshift ? *regshift : 0; 2527 2528 info->irq = irq_of_parse_and_map(dev->node, 0); 2529 info->dev = &dev->dev; 2530 2531 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n", 2532 info->io.addr_data, info->io.regsize, info->io.regspacing, 2533 info->irq); 2534 2535 dev_set_drvdata(&dev->dev, info); 2536 2537 return try_smi_init(info); 2538 } 2539 2540 static int __devexit ipmi_of_remove(struct of_device *dev) 2541 { 2542 cleanup_one_si(dev_get_drvdata(&dev->dev)); 2543 return 0; 2544 } 2545 2546 static struct of_device_id ipmi_match[] = 2547 { 2548 { .type = "ipmi", .compatible = "ipmi-kcs", 2549 .data = (void *)(unsigned long) SI_KCS }, 2550 { .type = "ipmi", .compatible = "ipmi-smic", 2551 .data = (void *)(unsigned long) SI_SMIC }, 2552 { .type = "ipmi", .compatible = "ipmi-bt", 2553 .data = (void *)(unsigned long) SI_BT }, 2554 {}, 2555 }; 2556 2557 static struct of_platform_driver ipmi_of_platform_driver = { 2558 .name = "ipmi", 2559 .match_table = ipmi_match, 2560 .probe = ipmi_of_probe, 2561 .remove = __devexit_p(ipmi_of_remove), 2562 }; 2563 #endif /* CONFIG_PPC_OF */ 2564 2565 static int wait_for_msg_done(struct smi_info *smi_info) 2566 { 2567 enum si_sm_result smi_result; 2568 2569 smi_result = smi_info->handlers->event(smi_info->si_sm, 0); 2570 for (;;) { 2571 if (smi_result == SI_SM_CALL_WITH_DELAY || 2572 smi_result == SI_SM_CALL_WITH_TICK_DELAY) { 2573 schedule_timeout_uninterruptible(1); 2574 smi_result = smi_info->handlers->event( 2575 smi_info->si_sm, 100); 2576 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { 2577 smi_result = smi_info->handlers->event( 2578 smi_info->si_sm, 0); 2579 } else 2580 break; 2581 } 2582 if (smi_result == SI_SM_HOSED) 2583 /* 2584 * We couldn't get the state machine to run, so whatever's at 2585 * the port is probably not an IPMI SMI interface. 2586 */ 2587 return -ENODEV; 2588 2589 return 0; 2590 } 2591 2592 static int try_get_dev_id(struct smi_info *smi_info) 2593 { 2594 unsigned char msg[2]; 2595 unsigned char *resp; 2596 unsigned long resp_len; 2597 int rv = 0; 2598 2599 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); 2600 if (!resp) 2601 return -ENOMEM; 2602 2603 /* 2604 * Do a Get Device ID command, since it comes back with some 2605 * useful info. 2606 */ 2607 msg[0] = IPMI_NETFN_APP_REQUEST << 2; 2608 msg[1] = IPMI_GET_DEVICE_ID_CMD; 2609 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); 2610 2611 rv = wait_for_msg_done(smi_info); 2612 if (rv) 2613 goto out; 2614 2615 resp_len = smi_info->handlers->get_result(smi_info->si_sm, 2616 resp, IPMI_MAX_MSG_LENGTH); 2617 2618 /* Check and record info from the get device id, in case we need it. */ 2619 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); 2620 2621 out: 2622 kfree(resp); 2623 return rv; 2624 } 2625 2626 static int try_enable_event_buffer(struct smi_info *smi_info) 2627 { 2628 unsigned char msg[3]; 2629 unsigned char *resp; 2630 unsigned long resp_len; 2631 int rv = 0; 2632 2633 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); 2634 if (!resp) 2635 return -ENOMEM; 2636 2637 msg[0] = IPMI_NETFN_APP_REQUEST << 2; 2638 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; 2639 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); 2640 2641 rv = wait_for_msg_done(smi_info); 2642 if (rv) { 2643 printk(KERN_WARNING 2644 "ipmi_si: Error getting response from get global," 2645 " enables command, the event buffer is not" 2646 " enabled.\n"); 2647 goto out; 2648 } 2649 2650 resp_len = smi_info->handlers->get_result(smi_info->si_sm, 2651 resp, IPMI_MAX_MSG_LENGTH); 2652 2653 if (resp_len < 4 || 2654 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || 2655 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || 2656 resp[2] != 0) { 2657 printk(KERN_WARNING 2658 "ipmi_si: Invalid return from get global" 2659 " enables command, cannot enable the event" 2660 " buffer.\n"); 2661 rv = -EINVAL; 2662 goto out; 2663 } 2664 2665 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) 2666 /* buffer is already enabled, nothing to do. */ 2667 goto out; 2668 2669 msg[0] = IPMI_NETFN_APP_REQUEST << 2; 2670 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; 2671 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; 2672 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); 2673 2674 rv = wait_for_msg_done(smi_info); 2675 if (rv) { 2676 printk(KERN_WARNING 2677 "ipmi_si: Error getting response from set global," 2678 " enables command, the event buffer is not" 2679 " enabled.\n"); 2680 goto out; 2681 } 2682 2683 resp_len = smi_info->handlers->get_result(smi_info->si_sm, 2684 resp, IPMI_MAX_MSG_LENGTH); 2685 2686 if (resp_len < 3 || 2687 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || 2688 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { 2689 printk(KERN_WARNING 2690 "ipmi_si: Invalid return from get global," 2691 "enables command, not enable the event" 2692 " buffer.\n"); 2693 rv = -EINVAL; 2694 goto out; 2695 } 2696 2697 if (resp[2] != 0) 2698 /* 2699 * An error when setting the event buffer bit means 2700 * that the event buffer is not supported. 2701 */ 2702 rv = -ENOENT; 2703 out: 2704 kfree(resp); 2705 return rv; 2706 } 2707 2708 static int type_file_read_proc(char *page, char **start, off_t off, 2709 int count, int *eof, void *data) 2710 { 2711 struct smi_info *smi = data; 2712 2713 return sprintf(page, "%s\n", si_to_str[smi->si_type]); 2714 } 2715 2716 static int stat_file_read_proc(char *page, char **start, off_t off, 2717 int count, int *eof, void *data) 2718 { 2719 char *out = (char *) page; 2720 struct smi_info *smi = data; 2721 2722 out += sprintf(out, "interrupts_enabled: %d\n", 2723 smi->irq && !smi->interrupt_disabled); 2724 out += sprintf(out, "short_timeouts: %u\n", 2725 smi_get_stat(smi, short_timeouts)); 2726 out += sprintf(out, "long_timeouts: %u\n", 2727 smi_get_stat(smi, long_timeouts)); 2728 out += sprintf(out, "idles: %u\n", 2729 smi_get_stat(smi, idles)); 2730 out += sprintf(out, "interrupts: %u\n", 2731 smi_get_stat(smi, interrupts)); 2732 out += sprintf(out, "attentions: %u\n", 2733 smi_get_stat(smi, attentions)); 2734 out += sprintf(out, "flag_fetches: %u\n", 2735 smi_get_stat(smi, flag_fetches)); 2736 out += sprintf(out, "hosed_count: %u\n", 2737 smi_get_stat(smi, hosed_count)); 2738 out += sprintf(out, "complete_transactions: %u\n", 2739 smi_get_stat(smi, complete_transactions)); 2740 out += sprintf(out, "events: %u\n", 2741 smi_get_stat(smi, events)); 2742 out += sprintf(out, "watchdog_pretimeouts: %u\n", 2743 smi_get_stat(smi, watchdog_pretimeouts)); 2744 out += sprintf(out, "incoming_messages: %u\n", 2745 smi_get_stat(smi, incoming_messages)); 2746 2747 return out - page; 2748 } 2749 2750 static int param_read_proc(char *page, char **start, off_t off, 2751 int count, int *eof, void *data) 2752 { 2753 struct smi_info *smi = data; 2754 2755 return sprintf(page, 2756 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", 2757 si_to_str[smi->si_type], 2758 addr_space_to_str[smi->io.addr_type], 2759 smi->io.addr_data, 2760 smi->io.regspacing, 2761 smi->io.regsize, 2762 smi->io.regshift, 2763 smi->irq, 2764 smi->slave_addr); 2765 } 2766 2767 /* 2768 * oem_data_avail_to_receive_msg_avail 2769 * @info - smi_info structure with msg_flags set 2770 * 2771 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL 2772 * Returns 1 indicating need to re-run handle_flags(). 2773 */ 2774 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) 2775 { 2776 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | 2777 RECEIVE_MSG_AVAIL); 2778 return 1; 2779 } 2780 2781 /* 2782 * setup_dell_poweredge_oem_data_handler 2783 * @info - smi_info.device_id must be populated 2784 * 2785 * Systems that match, but have firmware version < 1.40 may assert 2786 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that 2787 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL 2788 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags 2789 * as RECEIVE_MSG_AVAIL instead. 2790 * 2791 * As Dell has no plans to release IPMI 1.5 firmware that *ever* 2792 * assert the OEM[012] bits, and if it did, the driver would have to 2793 * change to handle that properly, we don't actually check for the 2794 * firmware version. 2795 * Device ID = 0x20 BMC on PowerEdge 8G servers 2796 * Device Revision = 0x80 2797 * Firmware Revision1 = 0x01 BMC version 1.40 2798 * Firmware Revision2 = 0x40 BCD encoded 2799 * IPMI Version = 0x51 IPMI 1.5 2800 * Manufacturer ID = A2 02 00 Dell IANA 2801 * 2802 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert 2803 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. 2804 * 2805 */ 2806 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 2807 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 2808 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 2809 #define DELL_IANA_MFR_ID 0x0002a2 2810 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) 2811 { 2812 struct ipmi_device_id *id = &smi_info->device_id; 2813 if (id->manufacturer_id == DELL_IANA_MFR_ID) { 2814 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && 2815 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && 2816 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { 2817 smi_info->oem_data_avail_handler = 2818 oem_data_avail_to_receive_msg_avail; 2819 } else if (ipmi_version_major(id) < 1 || 2820 (ipmi_version_major(id) == 1 && 2821 ipmi_version_minor(id) < 5)) { 2822 smi_info->oem_data_avail_handler = 2823 oem_data_avail_to_receive_msg_avail; 2824 } 2825 } 2826 } 2827 2828 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA 2829 static void return_hosed_msg_badsize(struct smi_info *smi_info) 2830 { 2831 struct ipmi_smi_msg *msg = smi_info->curr_msg; 2832 2833 /* Make it a reponse */ 2834 msg->rsp[0] = msg->data[0] | 4; 2835 msg->rsp[1] = msg->data[1]; 2836 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; 2837 msg->rsp_size = 3; 2838 smi_info->curr_msg = NULL; 2839 deliver_recv_msg(smi_info, msg); 2840 } 2841 2842 /* 2843 * dell_poweredge_bt_xaction_handler 2844 * @info - smi_info.device_id must be populated 2845 * 2846 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will 2847 * not respond to a Get SDR command if the length of the data 2848 * requested is exactly 0x3A, which leads to command timeouts and no 2849 * data returned. This intercepts such commands, and causes userspace 2850 * callers to try again with a different-sized buffer, which succeeds. 2851 */ 2852 2853 #define STORAGE_NETFN 0x0A 2854 #define STORAGE_CMD_GET_SDR 0x23 2855 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, 2856 unsigned long unused, 2857 void *in) 2858 { 2859 struct smi_info *smi_info = in; 2860 unsigned char *data = smi_info->curr_msg->data; 2861 unsigned int size = smi_info->curr_msg->data_size; 2862 if (size >= 8 && 2863 (data[0]>>2) == STORAGE_NETFN && 2864 data[1] == STORAGE_CMD_GET_SDR && 2865 data[7] == 0x3A) { 2866 return_hosed_msg_badsize(smi_info); 2867 return NOTIFY_STOP; 2868 } 2869 return NOTIFY_DONE; 2870 } 2871 2872 static struct notifier_block dell_poweredge_bt_xaction_notifier = { 2873 .notifier_call = dell_poweredge_bt_xaction_handler, 2874 }; 2875 2876 /* 2877 * setup_dell_poweredge_bt_xaction_handler 2878 * @info - smi_info.device_id must be filled in already 2879 * 2880 * Fills in smi_info.device_id.start_transaction_pre_hook 2881 * when we know what function to use there. 2882 */ 2883 static void 2884 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) 2885 { 2886 struct ipmi_device_id *id = &smi_info->device_id; 2887 if (id->manufacturer_id == DELL_IANA_MFR_ID && 2888 smi_info->si_type == SI_BT) 2889 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); 2890 } 2891 2892 /* 2893 * setup_oem_data_handler 2894 * @info - smi_info.device_id must be filled in already 2895 * 2896 * Fills in smi_info.device_id.oem_data_available_handler 2897 * when we know what function to use there. 2898 */ 2899 2900 static void setup_oem_data_handler(struct smi_info *smi_info) 2901 { 2902 setup_dell_poweredge_oem_data_handler(smi_info); 2903 } 2904 2905 static void setup_xaction_handlers(struct smi_info *smi_info) 2906 { 2907 setup_dell_poweredge_bt_xaction_handler(smi_info); 2908 } 2909 2910 static inline void wait_for_timer_and_thread(struct smi_info *smi_info) 2911 { 2912 if (smi_info->intf) { 2913 /* 2914 * The timer and thread are only running if the 2915 * interface has been started up and registered. 2916 */ 2917 if (smi_info->thread != NULL) 2918 kthread_stop(smi_info->thread); 2919 del_timer_sync(&smi_info->si_timer); 2920 } 2921 } 2922 2923 static __devinitdata struct ipmi_default_vals 2924 { 2925 int type; 2926 int port; 2927 } ipmi_defaults[] = 2928 { 2929 { .type = SI_KCS, .port = 0xca2 }, 2930 { .type = SI_SMIC, .port = 0xca9 }, 2931 { .type = SI_BT, .port = 0xe4 }, 2932 { .port = 0 } 2933 }; 2934 2935 static __devinit void default_find_bmc(void) 2936 { 2937 struct smi_info *info; 2938 int i; 2939 2940 for (i = 0; ; i++) { 2941 if (!ipmi_defaults[i].port) 2942 break; 2943 #ifdef CONFIG_PPC 2944 if (check_legacy_ioport(ipmi_defaults[i].port)) 2945 continue; 2946 #endif 2947 info = kzalloc(sizeof(*info), GFP_KERNEL); 2948 if (!info) 2949 return; 2950 2951 info->addr_source = NULL; 2952 2953 info->si_type = ipmi_defaults[i].type; 2954 info->io_setup = port_setup; 2955 info->io.addr_data = ipmi_defaults[i].port; 2956 info->io.addr_type = IPMI_IO_ADDR_SPACE; 2957 2958 info->io.addr = NULL; 2959 info->io.regspacing = DEFAULT_REGSPACING; 2960 info->io.regsize = DEFAULT_REGSPACING; 2961 info->io.regshift = 0; 2962 2963 if (try_smi_init(info) == 0) { 2964 /* Found one... */ 2965 printk(KERN_INFO "ipmi_si: Found default %s state" 2966 " machine at %s address 0x%lx\n", 2967 si_to_str[info->si_type], 2968 addr_space_to_str[info->io.addr_type], 2969 info->io.addr_data); 2970 return; 2971 } 2972 } 2973 } 2974 2975 static int is_new_interface(struct smi_info *info) 2976 { 2977 struct smi_info *e; 2978 2979 list_for_each_entry(e, &smi_infos, link) { 2980 if (e->io.addr_type != info->io.addr_type) 2981 continue; 2982 if (e->io.addr_data == info->io.addr_data) 2983 return 0; 2984 } 2985 2986 return 1; 2987 } 2988 2989 static int try_smi_init(struct smi_info *new_smi) 2990 { 2991 int rv; 2992 int i; 2993 2994 if (new_smi->addr_source) { 2995 printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" 2996 " machine at %s address 0x%lx, slave address 0x%x," 2997 " irq %d\n", 2998 new_smi->addr_source, 2999 si_to_str[new_smi->si_type], 3000 addr_space_to_str[new_smi->io.addr_type], 3001 new_smi->io.addr_data, 3002 new_smi->slave_addr, new_smi->irq); 3003 } 3004 3005 mutex_lock(&smi_infos_lock); 3006 if (!is_new_interface(new_smi)) { 3007 printk(KERN_WARNING "ipmi_si: duplicate interface\n"); 3008 rv = -EBUSY; 3009 goto out_err; 3010 } 3011 3012 /* So we know not to free it unless we have allocated one. */ 3013 new_smi->intf = NULL; 3014 new_smi->si_sm = NULL; 3015 new_smi->handlers = NULL; 3016 3017 switch (new_smi->si_type) { 3018 case SI_KCS: 3019 new_smi->handlers = &kcs_smi_handlers; 3020 break; 3021 3022 case SI_SMIC: 3023 new_smi->handlers = &smic_smi_handlers; 3024 break; 3025 3026 case SI_BT: 3027 new_smi->handlers = &bt_smi_handlers; 3028 break; 3029 3030 default: 3031 /* No support for anything else yet. */ 3032 rv = -EIO; 3033 goto out_err; 3034 } 3035 3036 /* Allocate the state machine's data and initialize it. */ 3037 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); 3038 if (!new_smi->si_sm) { 3039 printk(KERN_ERR "Could not allocate state machine memory\n"); 3040 rv = -ENOMEM; 3041 goto out_err; 3042 } 3043 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, 3044 &new_smi->io); 3045 3046 /* Now that we know the I/O size, we can set up the I/O. */ 3047 rv = new_smi->io_setup(new_smi); 3048 if (rv) { 3049 printk(KERN_ERR "Could not set up I/O space\n"); 3050 goto out_err; 3051 } 3052 3053 spin_lock_init(&(new_smi->si_lock)); 3054 spin_lock_init(&(new_smi->msg_lock)); 3055 3056 /* Do low-level detection first. */ 3057 if (new_smi->handlers->detect(new_smi->si_sm)) { 3058 if (new_smi->addr_source) 3059 printk(KERN_INFO "ipmi_si: Interface detection" 3060 " failed\n"); 3061 rv = -ENODEV; 3062 goto out_err; 3063 } 3064 3065 /* 3066 * Attempt a get device id command. If it fails, we probably 3067 * don't have a BMC here. 3068 */ 3069 rv = try_get_dev_id(new_smi); 3070 if (rv) { 3071 if (new_smi->addr_source) 3072 printk(KERN_INFO "ipmi_si: There appears to be no BMC" 3073 " at this location\n"); 3074 goto out_err; 3075 } 3076 3077 setup_oem_data_handler(new_smi); 3078 setup_xaction_handlers(new_smi); 3079 3080 INIT_LIST_HEAD(&(new_smi->xmit_msgs)); 3081 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); 3082 new_smi->curr_msg = NULL; 3083 atomic_set(&new_smi->req_events, 0); 3084 new_smi->run_to_completion = 0; 3085 for (i = 0; i < SI_NUM_STATS; i++) 3086 atomic_set(&new_smi->stats[i], 0); 3087 3088 new_smi->interrupt_disabled = 0; 3089 atomic_set(&new_smi->stop_operation, 0); 3090 new_smi->intf_num = smi_num; 3091 smi_num++; 3092 3093 rv = try_enable_event_buffer(new_smi); 3094 if (rv == 0) 3095 new_smi->has_event_buffer = 1; 3096 3097 /* 3098 * Start clearing the flags before we enable interrupts or the 3099 * timer to avoid racing with the timer. 3100 */ 3101 start_clear_flags(new_smi); 3102 /* IRQ is defined to be set when non-zero. */ 3103 if (new_smi->irq) 3104 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; 3105 3106 if (!new_smi->dev) { 3107 /* 3108 * If we don't already have a device from something 3109 * else (like PCI), then register a new one. 3110 */ 3111 new_smi->pdev = platform_device_alloc("ipmi_si", 3112 new_smi->intf_num); 3113 if (!new_smi->pdev) { 3114 printk(KERN_ERR 3115 "ipmi_si_intf:" 3116 " Unable to allocate platform device\n"); 3117 goto out_err; 3118 } 3119 new_smi->dev = &new_smi->pdev->dev; 3120 new_smi->dev->driver = &ipmi_driver.driver; 3121 3122 rv = platform_device_add(new_smi->pdev); 3123 if (rv) { 3124 printk(KERN_ERR 3125 "ipmi_si_intf:" 3126 " Unable to register system interface device:" 3127 " %d\n", 3128 rv); 3129 goto out_err; 3130 } 3131 new_smi->dev_registered = 1; 3132 } 3133 3134 rv = ipmi_register_smi(&handlers, 3135 new_smi, 3136 &new_smi->device_id, 3137 new_smi->dev, 3138 "bmc", 3139 new_smi->slave_addr); 3140 if (rv) { 3141 printk(KERN_ERR 3142 "ipmi_si: Unable to register device: error %d\n", 3143 rv); 3144 goto out_err_stop_timer; 3145 } 3146 3147 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", 3148 type_file_read_proc, 3149 new_smi); 3150 if (rv) { 3151 printk(KERN_ERR 3152 "ipmi_si: Unable to create proc entry: %d\n", 3153 rv); 3154 goto out_err_stop_timer; 3155 } 3156 3157 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", 3158 stat_file_read_proc, 3159 new_smi); 3160 if (rv) { 3161 printk(KERN_ERR 3162 "ipmi_si: Unable to create proc entry: %d\n", 3163 rv); 3164 goto out_err_stop_timer; 3165 } 3166 3167 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", 3168 param_read_proc, 3169 new_smi); 3170 if (rv) { 3171 printk(KERN_ERR 3172 "ipmi_si: Unable to create proc entry: %d\n", 3173 rv); 3174 goto out_err_stop_timer; 3175 } 3176 3177 list_add_tail(&new_smi->link, &smi_infos); 3178 3179 mutex_unlock(&smi_infos_lock); 3180 3181 printk(KERN_INFO "IPMI %s interface initialized\n", 3182 si_to_str[new_smi->si_type]); 3183 3184 return 0; 3185 3186 out_err_stop_timer: 3187 atomic_inc(&new_smi->stop_operation); 3188 wait_for_timer_and_thread(new_smi); 3189 3190 out_err: 3191 if (new_smi->intf) 3192 ipmi_unregister_smi(new_smi->intf); 3193 3194 if (new_smi->irq_cleanup) 3195 new_smi->irq_cleanup(new_smi); 3196 3197 /* 3198 * Wait until we know that we are out of any interrupt 3199 * handlers might have been running before we freed the 3200 * interrupt. 3201 */ 3202 synchronize_sched(); 3203 3204 if (new_smi->si_sm) { 3205 if (new_smi->handlers) 3206 new_smi->handlers->cleanup(new_smi->si_sm); 3207 kfree(new_smi->si_sm); 3208 } 3209 if (new_smi->addr_source_cleanup) 3210 new_smi->addr_source_cleanup(new_smi); 3211 if (new_smi->io_cleanup) 3212 new_smi->io_cleanup(new_smi); 3213 3214 if (new_smi->dev_registered) 3215 platform_device_unregister(new_smi->pdev); 3216 3217 kfree(new_smi); 3218 3219 mutex_unlock(&smi_infos_lock); 3220 3221 return rv; 3222 } 3223 3224 static __devinit int init_ipmi_si(void) 3225 { 3226 int i; 3227 char *str; 3228 int rv; 3229 3230 if (initialized) 3231 return 0; 3232 initialized = 1; 3233 3234 /* Register the device drivers. */ 3235 rv = driver_register(&ipmi_driver.driver); 3236 if (rv) { 3237 printk(KERN_ERR 3238 "init_ipmi_si: Unable to register driver: %d\n", 3239 rv); 3240 return rv; 3241 } 3242 3243 3244 /* Parse out the si_type string into its components. */ 3245 str = si_type_str; 3246 if (*str != '\0') { 3247 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { 3248 si_type[i] = str; 3249 str = strchr(str, ','); 3250 if (str) { 3251 *str = '\0'; 3252 str++; 3253 } else { 3254 break; 3255 } 3256 } 3257 } 3258 3259 printk(KERN_INFO "IPMI System Interface driver.\n"); 3260 3261 hardcode_find_bmc(); 3262 3263 #ifdef CONFIG_DMI 3264 dmi_find_bmc(); 3265 #endif 3266 3267 #ifdef CONFIG_ACPI 3268 spmi_find_bmc(); 3269 #endif 3270 #ifdef CONFIG_ACPI 3271 pnp_register_driver(&ipmi_pnp_driver); 3272 #endif 3273 3274 #ifdef CONFIG_PCI 3275 rv = pci_register_driver(&ipmi_pci_driver); 3276 if (rv) 3277 printk(KERN_ERR 3278 "init_ipmi_si: Unable to register PCI driver: %d\n", 3279 rv); 3280 #endif 3281 3282 #ifdef CONFIG_PPC_OF 3283 of_register_platform_driver(&ipmi_of_platform_driver); 3284 #endif 3285 3286 if (si_trydefaults) { 3287 mutex_lock(&smi_infos_lock); 3288 if (list_empty(&smi_infos)) { 3289 /* No BMC was found, try defaults. */ 3290 mutex_unlock(&smi_infos_lock); 3291 default_find_bmc(); 3292 } else { 3293 mutex_unlock(&smi_infos_lock); 3294 } 3295 } 3296 3297 mutex_lock(&smi_infos_lock); 3298 if (unload_when_empty && list_empty(&smi_infos)) { 3299 mutex_unlock(&smi_infos_lock); 3300 #ifdef CONFIG_PCI 3301 pci_unregister_driver(&ipmi_pci_driver); 3302 #endif 3303 3304 #ifdef CONFIG_PPC_OF 3305 of_unregister_platform_driver(&ipmi_of_platform_driver); 3306 #endif 3307 driver_unregister(&ipmi_driver.driver); 3308 printk(KERN_WARNING 3309 "ipmi_si: Unable to find any System Interface(s)\n"); 3310 return -ENODEV; 3311 } else { 3312 mutex_unlock(&smi_infos_lock); 3313 return 0; 3314 } 3315 } 3316 module_init(init_ipmi_si); 3317 3318 static void cleanup_one_si(struct smi_info *to_clean) 3319 { 3320 int rv; 3321 unsigned long flags; 3322 3323 if (!to_clean) 3324 return; 3325 3326 list_del(&to_clean->link); 3327 3328 /* Tell the driver that we are shutting down. */ 3329 atomic_inc(&to_clean->stop_operation); 3330 3331 /* 3332 * Make sure the timer and thread are stopped and will not run 3333 * again. 3334 */ 3335 wait_for_timer_and_thread(to_clean); 3336 3337 /* 3338 * Timeouts are stopped, now make sure the interrupts are off 3339 * for the device. A little tricky with locks to make sure 3340 * there are no races. 3341 */ 3342 spin_lock_irqsave(&to_clean->si_lock, flags); 3343 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { 3344 spin_unlock_irqrestore(&to_clean->si_lock, flags); 3345 poll(to_clean); 3346 schedule_timeout_uninterruptible(1); 3347 spin_lock_irqsave(&to_clean->si_lock, flags); 3348 } 3349 disable_si_irq(to_clean); 3350 spin_unlock_irqrestore(&to_clean->si_lock, flags); 3351 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { 3352 poll(to_clean); 3353 schedule_timeout_uninterruptible(1); 3354 } 3355 3356 /* Clean up interrupts and make sure that everything is done. */ 3357 if (to_clean->irq_cleanup) 3358 to_clean->irq_cleanup(to_clean); 3359 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { 3360 poll(to_clean); 3361 schedule_timeout_uninterruptible(1); 3362 } 3363 3364 rv = ipmi_unregister_smi(to_clean->intf); 3365 if (rv) { 3366 printk(KERN_ERR 3367 "ipmi_si: Unable to unregister device: errno=%d\n", 3368 rv); 3369 } 3370 3371 to_clean->handlers->cleanup(to_clean->si_sm); 3372 3373 kfree(to_clean->si_sm); 3374 3375 if (to_clean->addr_source_cleanup) 3376 to_clean->addr_source_cleanup(to_clean); 3377 if (to_clean->io_cleanup) 3378 to_clean->io_cleanup(to_clean); 3379 3380 if (to_clean->dev_registered) 3381 platform_device_unregister(to_clean->pdev); 3382 3383 kfree(to_clean); 3384 } 3385 3386 static __exit void cleanup_ipmi_si(void) 3387 { 3388 struct smi_info *e, *tmp_e; 3389 3390 if (!initialized) 3391 return; 3392 3393 #ifdef CONFIG_PCI 3394 pci_unregister_driver(&ipmi_pci_driver); 3395 #endif 3396 #ifdef CONFIG_ACPI 3397 pnp_unregister_driver(&ipmi_pnp_driver); 3398 #endif 3399 3400 #ifdef CONFIG_PPC_OF 3401 of_unregister_platform_driver(&ipmi_of_platform_driver); 3402 #endif 3403 3404 mutex_lock(&smi_infos_lock); 3405 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) 3406 cleanup_one_si(e); 3407 mutex_unlock(&smi_infos_lock); 3408 3409 driver_unregister(&ipmi_driver.driver); 3410 } 3411 module_exit(cleanup_ipmi_si); 3412 3413 MODULE_LICENSE("GPL"); 3414 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); 3415 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" 3416 " system interfaces."); 3417