1 // SPDX-License-Identifier: GPL-2.0+
5  * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
40 #include <linux/ipmi.h>
65 	/* FIXME - add watchdog stuff. */
68 /* Some BT-specific defines we need here. */
73 /* 'invalid' to allow a firmware-specified interface to be disabled */
112 	/* Number of IPMI events received from the hardware. */
138 	 * IPMI
143 	 * Per-OEM handler, called from handle_flags().  Returns 1
144 	 * when handle_flags() needs to be re-run or 0 indicating it
199 	 * memory.  Once that situation clears up, it will re-enable
249 	atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
251 	((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
272 	dev_dbg(smi_info->io.dev, "**%s: %lld.%9.9ld\n",  in debug_timestamp()
289 	ipmi_smi_msg_received(smi_info->intf, msg);  in deliver_recv_msg()
294 	struct ipmi_smi_msg *msg = smi_info->curr_msg;  in return_hosed_msg()
301 	msg->rsp[0] = msg->data[0] | 4;  in return_hosed_msg()
302 	msg->rsp[1] = msg->data[1];  in return_hosed_msg()
303 	msg->rsp[2] = cCode;  in return_hosed_msg()
304 	msg->rsp_size = 3;  in return_hosed_msg()
306 	smi_info->curr_msg = NULL;  in return_hosed_msg()
314 	if (!smi_info->waiting_msg) {  in start_next_msg()
315 		smi_info->curr_msg = NULL;  in start_next_msg()
320 		smi_info->curr_msg = smi_info->waiting_msg;  in start_next_msg()
321 		smi_info->waiting_msg = NULL;  in start_next_msg()
329 		err = smi_info->handlers->start_transaction(  in start_next_msg()
330 			smi_info->si_sm,  in start_next_msg()
331 			smi_info->curr_msg->data,  in start_next_msg()
332 			smi_info->curr_msg->data_size);  in start_next_msg()
344 	if (!smi_info->timer_can_start)  in smi_mod_timer()
346 	smi_info->last_timeout_jiffies = jiffies;  in smi_mod_timer()
347 	mod_timer(&smi_info->si_timer, new_val);  in smi_mod_timer()
348 	smi_info->timer_running = true;  in smi_mod_timer()
359 	if (smi_info->thread)  in start_new_msg()
360 		wake_up_process(smi_info->thread);  in start_new_msg()
362 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, size);  in start_new_msg()
373 	smi_info->si_state = SI_CHECKING_ENABLES;  in start_check_enables()
380 	/* Make sure the watchdog pre-timeout flag is not set at startup. */  in start_clear_flags()
386 	smi_info->si_state = SI_CLEARING_FLAGS;  in start_clear_flags()
391 	smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);  in start_getting_msg_queue()
392 	smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;  in start_getting_msg_queue()
393 	smi_info->curr_msg->data_size = 2;  in start_getting_msg_queue()
395 	start_new_msg(smi_info, smi_info->curr_msg->data,  in start_getting_msg_queue()
396 		      smi_info->curr_msg->data_size);  in start_getting_msg_queue()
397 	smi_info->si_state = SI_GETTING_MESSAGES;  in start_getting_msg_queue()
402 	smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);  in start_getting_events()
403 	smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;  in start_getting_events()
404 	smi_info->curr_msg->data_size = 2;  in start_getting_events()
406 	start_new_msg(smi_info, smi_info->curr_msg->data,  in start_getting_events()
407 		      smi_info->curr_msg->data_size);  in start_getting_events()
408 	smi_info->si_state = SI_GETTING_EVENTS;  in start_getting_events()
415  * memory, we will re-enable the interrupt.
422 	if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) {  in disable_si_irq()
423 		smi_info->interrupt_disabled = true;  in disable_si_irq()
432 	if ((smi_info->io.irq) && (smi_info->interrupt_disabled)) {  in enable_si_irq()
433 		smi_info->interrupt_disabled = false;  in enable_si_irq()
453 			smi_info->si_state = SI_NORMAL;  in alloc_msg_handle_irq()
464 	if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {  in handle_flags()
465 		/* Watchdog pre-timeout */  in handle_flags()
469 		smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;  in handle_flags()
470 		ipmi_smi_watchdog_pretimeout(smi_info->intf);  in handle_flags()
471 	} else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {  in handle_flags()
473 		smi_info->curr_msg = alloc_msg_handle_irq(smi_info);  in handle_flags()
474 		if (!smi_info->curr_msg)  in handle_flags()
478 	} else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {  in handle_flags()
480 		smi_info->curr_msg = alloc_msg_handle_irq(smi_info);  in handle_flags()
481 		if (!smi_info->curr_msg)  in handle_flags()
485 	} else if (smi_info->msg_flags & OEM_DATA_AVAIL &&  in handle_flags()
486 		   smi_info->oem_data_avail_handler) {  in handle_flags()
487 		if (smi_info->oem_data_avail_handler(smi_info))  in handle_flags()
490 		smi_info->si_state = SI_NORMAL;  in handle_flags()
504 	if (smi_info->supports_event_msg_buff)  in current_global_enables()
507 	if (((smi_info->io.irq && !smi_info->interrupt_disabled) ||  in current_global_enables()
508 	     smi_info->cannot_disable_irq) &&  in current_global_enables()
509 	    !smi_info->irq_enable_broken)  in current_global_enables()
512 	if (smi_info->supports_event_msg_buff &&  in current_global_enables()
513 	    smi_info->io.irq && !smi_info->interrupt_disabled &&  in current_global_enables()
514 	    !smi_info->irq_enable_broken)  in current_global_enables()
524 	u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG);  in check_bt_irq()
532 		smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,  in check_bt_irq()
535 		smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0);  in check_bt_irq()
543 	switch (smi_info->si_state) {  in handle_transaction_done()
545 		if (!smi_info->curr_msg)  in handle_transaction_done()
548 		smi_info->curr_msg->rsp_size  in handle_transaction_done()
549 			= smi_info->handlers->get_result(  in handle_transaction_done()
550 				smi_info->si_sm,  in handle_transaction_done()
551 				smi_info->curr_msg->rsp,  in handle_transaction_done()
559 		msg = smi_info->curr_msg;  in handle_transaction_done()
560 		smi_info->curr_msg = NULL;  in handle_transaction_done()
570 		len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);  in handle_transaction_done()
573 			smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
579 			smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
581 			smi_info->msg_flags = msg[3];  in handle_transaction_done()
592 		smi_info->handlers->get_result(smi_info->si_sm, msg, 3);  in handle_transaction_done()
595 			dev_warn_ratelimited(smi_info->io.dev,  in handle_transaction_done()
598 		smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
604 		smi_info->curr_msg->rsp_size  in handle_transaction_done()
605 			= smi_info->handlers->get_result(  in handle_transaction_done()
606 				smi_info->si_sm,  in handle_transaction_done()
607 				smi_info->curr_msg->rsp,  in handle_transaction_done()
615 		msg = smi_info->curr_msg;  in handle_transaction_done()
616 		smi_info->curr_msg = NULL;  in handle_transaction_done()
617 		if (msg->rsp[2] != 0) {  in handle_transaction_done()
619 			msg->done(msg);  in handle_transaction_done()
622 			smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;  in handle_transaction_done()
642 		smi_info->curr_msg->rsp_size  in handle_transaction_done()
643 			= smi_info->handlers->get_result(  in handle_transaction_done()
644 				smi_info->si_sm,  in handle_transaction_done()
645 				smi_info->curr_msg->rsp,  in handle_transaction_done()
653 		msg = smi_info->curr_msg;  in handle_transaction_done()
654 		smi_info->curr_msg = NULL;  in handle_transaction_done()
655 		if (msg->rsp[2] != 0) {  in handle_transaction_done()
657 			msg->done(msg);  in handle_transaction_done()
660 			smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;  in handle_transaction_done()
685 		smi_info->handlers->get_result(smi_info->si_sm, msg, 4);  in handle_transaction_done()
687 			dev_warn_ratelimited(smi_info->io.dev,  in handle_transaction_done()
689 				"Maybe ok, but ipmi might run very slowly.\n",  in handle_transaction_done()
691 			smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
695 		if (smi_info->io.si_type == SI_BT)  in handle_transaction_done()
703 			smi_info->handlers->start_transaction(  in handle_transaction_done()
704 				smi_info->si_sm, msg, 3);  in handle_transaction_done()
705 			smi_info->si_state = SI_SETTING_ENABLES;  in handle_transaction_done()
706 		} else if (smi_info->supports_event_msg_buff) {  in handle_transaction_done()
707 			smi_info->curr_msg = ipmi_alloc_smi_msg();  in handle_transaction_done()
708 			if (!smi_info->curr_msg) {  in handle_transaction_done()
709 				smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
714 			smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
723 		smi_info->handlers->get_result(smi_info->si_sm, msg, 4);  in handle_transaction_done()
725 			dev_warn_ratelimited(smi_info->io.dev,  in handle_transaction_done()
729 		if (smi_info->supports_event_msg_buff) {  in handle_transaction_done()
730 			smi_info->curr_msg = ipmi_alloc_smi_msg();  in handle_transaction_done()
731 			if (!smi_info->curr_msg) {  in handle_transaction_done()
732 				smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
737 			smi_info->si_state = SI_NORMAL;  in handle_transaction_done()
763 	si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);  in smi_event_handler()
766 		si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);  in smi_event_handler()
780 		smi_info->si_state = SI_NORMAL;  in smi_event_handler()
781 		if (smi_info->curr_msg != NULL) {  in smi_event_handler()
796 	if (si_sm_result == SI_SM_ATTN || smi_info->got_attn) {  in smi_event_handler()
799 		if (smi_info->si_state != SI_NORMAL) {  in smi_event_handler()
804 			smi_info->got_attn = true;  in smi_event_handler()
806 			smi_info->got_attn = false;  in smi_event_handler()
820 			smi_info->si_state = SI_GETTING_FLAGS;  in smi_event_handler()
835 	    && (atomic_read(&smi_info->req_events))) {  in smi_event_handler()
840 		atomic_set(&smi_info->req_events, 0);  in smi_event_handler()
848 		if (smi_info->supports_event_msg_buff || smi_info->io.irq) {  in smi_event_handler()
851 			smi_info->curr_msg = alloc_msg_handle_irq(smi_info);  in smi_event_handler()
852 			if (!smi_info->curr_msg)  in smi_event_handler()
860 	if (si_sm_result == SI_SM_IDLE && smi_info->timer_running) {  in smi_event_handler()
862 		if (del_timer(&smi_info->si_timer))  in smi_event_handler()
863 			smi_info->timer_running = false;  in smi_event_handler()
872 	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {  in check_start_timer_thread()
875 		if (smi_info->thread)  in check_start_timer_thread()
876 			wake_up_process(smi_info->thread);  in check_start_timer_thread()
889 	 * Currently, this function is called only in run-to-completion  in flush_messages()
890 	 * mode.  This means we are single-threaded, no need for locks.  in flush_messages()
907 	if (smi_info->run_to_completion) {  in sender()
912 		smi_info->waiting_msg = msg;  in sender()
916 	spin_lock_irqsave(&smi_info->si_lock, flags);  in sender()
924 	BUG_ON(smi_info->waiting_msg);  in sender()
925 	smi_info->waiting_msg = msg;  in sender()
927 	spin_unlock_irqrestore(&smi_info->si_lock, flags);  in sender()
934 	smi_info->run_to_completion = i_run_to_completion;  in set_run_to_completion()
940  * Use -1 as a special constant to tell that we are spinning in kipmid
943 #define IPMI_TIME_NOT_BUSY ns_to_ktime(-1ull)
950 	if (smi_info->si_num < num_max_busy_us)  in ipmi_thread_busy_wait()
951 		max_busy_us = kipmid_max_busy_us[smi_info->si_num];  in ipmi_thread_busy_wait()
967  * A busy-waiting loop for speeding up IPMI operation.
973  * Documentation/driver-api/ipmi.rst for details.
986 		spin_lock_irqsave(&(smi_info->si_lock), flags);  in ipmi_thread()
996 		if (smi_result != SI_SM_IDLE && !smi_info->timer_running)  in ipmi_thread()
999 		spin_unlock_irqrestore(&(smi_info->si_lock), flags);  in ipmi_thread()
1011 			if (smi_info->in_maintenance_mode)  in ipmi_thread()
1016 			if (atomic_read(&smi_info->need_watch)) {  in ipmi_thread()
1035 	bool run_to_completion = smi_info->run_to_completion;  in poll()
1043 		spin_lock_irqsave(&smi_info->si_lock, flags);  in poll()
1046 		spin_unlock_irqrestore(&smi_info->si_lock, flags);  in poll()
1053 	if (!smi_info->has_event_buffer)  in request_events()
1056 	atomic_set(&smi_info->req_events, 1);  in request_events()
1067 	atomic_set(&smi_info->need_watch, enable);  in set_need_watch()
1068 	spin_lock_irqsave(&smi_info->si_lock, flags);  in set_need_watch()
1070 	spin_unlock_irqrestore(&smi_info->si_lock, flags);  in set_need_watch()
1082 	spin_lock_irqsave(&(smi_info->si_lock), flags);  in smi_timeout()
1086 	time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)  in smi_timeout()
1090 	if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) {  in smi_timeout()
1113 		smi_info->timer_running = false;  in smi_timeout()
1114 	spin_unlock_irqrestore(&(smi_info->si_lock), flags);  in smi_timeout()
1122 	if (smi_info->io.si_type == SI_BT)  in ipmi_si_irq_handler()
1124 		smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,  in ipmi_si_irq_handler()
1128 	spin_lock_irqsave(&(smi_info->si_lock), flags);  in ipmi_si_irq_handler()
1135 	spin_unlock_irqrestore(&(smi_info->si_lock), flags);  in ipmi_si_irq_handler()
1145 	new_smi->intf = intf;  in smi_start_processing()
1148 	timer_setup(&new_smi->si_timer, smi_timeout, 0);  in smi_start_processing()
1149 	new_smi->timer_can_start = true;  in smi_start_processing()
1153 	if (new_smi->io.irq_setup) {  in smi_start_processing()
1154 		new_smi->io.irq_handler_data = new_smi;  in smi_start_processing()
1155 		new_smi->io.irq_setup(&new_smi->io);  in smi_start_processing()
1161 	if (new_smi->si_num < num_force_kipmid)  in smi_start_processing()
1162 		enable = force_kipmid[new_smi->si_num];  in smi_start_processing()
1167 	else if ((new_smi->io.si_type != SI_BT) && (!new_smi->io.irq))  in smi_start_processing()
1171 		new_smi->thread = kthread_run(ipmi_thread, new_smi,  in smi_start_processing()
1172 					      "kipmi%d", new_smi->si_num);  in smi_start_processing()
1173 		if (IS_ERR(new_smi->thread)) {  in smi_start_processing()
1174 			dev_notice(new_smi->io.dev,  in smi_start_processing()
1176 				   PTR_ERR(new_smi->thread));  in smi_start_processing()
1177 			new_smi->thread = NULL;  in smi_start_processing()
1188 	data->addr_src = smi->io.addr_source;  in get_smi_info()
1189 	data->dev = smi->io.dev;  in get_smi_info()
1190 	data->addr_info = smi->io.addr_info;  in get_smi_info()
1191 	get_device(smi->io.dev);  in get_smi_info()
1201 		atomic_set(&smi_info->req_events, 0);  in set_maintenance_mode()
1202 	smi_info->in_maintenance_mode = enable;  in set_maintenance_mode()
1228 …"Force the kipmi daemon to be enabled (1) or disabled(0).  Normally the IPMI driver auto-detects t…
1234 …"Max time (in microseconds) to busy-wait for IPMI data before sleeping. 0 (default) means to wait …
1238 	if (io->si_type == SI_BT)  in ipmi_irq_finish_setup()
1240 		io->outputb(io, IPMI_BT_INTMASK_REG,  in ipmi_irq_finish_setup()
1246 	if (io->si_type == SI_BT)  in ipmi_irq_start_cleanup()
1248 		io->outputb(io, IPMI_BT_INTMASK_REG, 0);  in ipmi_irq_start_cleanup()
1254 	free_irq(io->irq, io->irq_handler_data);  in std_irq_cleanup()
1261 	if (!io->irq)  in ipmi_std_irq_setup()
1264 	rv = request_irq(io->irq,  in ipmi_std_irq_setup()
1268 			 io->irq_handler_data);  in ipmi_std_irq_setup()
1270 		dev_warn(io->dev, "%s unable to claim interrupt %d, running polled\n",  in ipmi_std_irq_setup()
1271 			 SI_DEVICE_NAME, io->irq);  in ipmi_std_irq_setup()
1272 		io->irq = 0;  in ipmi_std_irq_setup()
1274 		io->irq_cleanup = std_irq_cleanup;  in ipmi_std_irq_setup()
1276 		dev_info(io->dev, "Using irq %d\n", io->irq);  in ipmi_std_irq_setup()
1286 	smi_result = smi_info->handlers->event(smi_info->si_sm, 0);  in wait_for_msg_done()
1291 			smi_result = smi_info->handlers->event(  in wait_for_msg_done()
1292 				smi_info->si_sm, jiffies_to_usecs(1));  in wait_for_msg_done()
1294 			smi_result = smi_info->handlers->event(  in wait_for_msg_done()
1295 				smi_info->si_sm, 0);  in wait_for_msg_done()
1302 		 * the port is probably not an IPMI SMI interface.  in wait_for_msg_done()
1304 		return -ENODEV;  in wait_for_msg_done()
1319 		return -ENOMEM;  in try_get_dev_id()
1329 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);  in try_get_dev_id()
1335 	resp_len = smi_info->handlers->get_result(smi_info->si_sm,  in try_get_dev_id()
1340 			resp + 2, resp_len - 2, &smi_info->device_id);  in try_get_dev_id()
1347 			dev_warn_ratelimited(smi_info->io.dev,  in try_get_dev_id()
1368 		return -ENOMEM;  in get_global_enables()
1372 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);  in get_global_enables()
1376 		dev_warn(smi_info->io.dev,  in get_global_enables()
1382 	resp_len = smi_info->handlers->get_result(smi_info->si_sm,  in get_global_enables()
1389 		dev_warn(smi_info->io.dev,  in get_global_enables()
1392 		rv = -EINVAL;  in get_global_enables()
1415 		return -ENOMEM;  in set_global_enables()
1420 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);  in set_global_enables()
1424 		dev_warn(smi_info->io.dev,  in set_global_enables()
1430 	resp_len = smi_info->handlers->get_result(smi_info->si_sm,  in set_global_enables()
1436 		dev_warn(smi_info->io.dev,  in set_global_enables()
1439 		rv = -EINVAL;  in set_global_enables()
1472 		dev_err(smi_info->io.dev,  in check_clr_rcv_irq()
1482 		dev_warn(smi_info->io.dev,  in check_clr_rcv_irq()
1484 		smi_info->cannot_disable_irq = true;  in check_clr_rcv_irq()
1498 	if (!smi_info->io.irq)  in check_set_rcv_irq()
1508 		dev_err(smi_info->io.dev,  in check_set_rcv_irq()
1518 		dev_warn(smi_info->io.dev,  in check_set_rcv_irq()
1520 		smi_info->cannot_disable_irq = true;  in check_set_rcv_irq()
1521 		smi_info->irq_enable_broken = true;  in check_set_rcv_irq()
1534 		return -ENOMEM;  in try_enable_event_buffer()
1538 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);  in try_enable_event_buffer()
1546 	resp_len = smi_info->handlers->get_result(smi_info->si_sm,  in try_enable_event_buffer()
1554 		rv = -EINVAL;  in try_enable_event_buffer()
1560 		smi_info->supports_event_msg_buff = true;  in try_enable_event_buffer()
1567 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);  in try_enable_event_buffer()
1575 	resp_len = smi_info->handlers->get_result(smi_info->si_sm,  in try_enable_event_buffer()
1582 		rv = -EINVAL;  in try_enable_event_buffer()
1591 		rv = -ENOENT;  in try_enable_event_buffer()
1593 		smi_info->supports_event_msg_buff = true;  in try_enable_event_buffer()
1617 	return sysfs_emit(buf, "%s\n", si_to_str[smi_info->io.si_type]);  in type_show()
1626 	int enabled = smi_info->io.irq && !smi_info->interrupt_disabled;  in interrupts_enabled_show()
1651 			"%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",  in params_show()
1652 			si_to_str[smi_info->io.si_type],  in params_show()
1653 			addr_space_to_str[smi_info->io.addr_space],  in params_show()
1654 			smi_info->io.addr_data,  in params_show()
1655 			smi_info->io.regspacing,  in params_show()
1656 			smi_info->io.regsize,  in params_show()
1657 			smi_info->io.regshift,  in params_show()
1658 			smi_info->io.irq,  in params_show()
1659 			smi_info->io.slave_addr);  in params_show()
1687  * @info - smi_info structure with msg_flags set
1690  * Returns 1 indicating need to re-run handle_flags().
1694 	smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |  in oem_data_avail_to_receive_msg_avail()
1701  * @info - smi_info.device_id must be populated
1705  * it's safe to do so.  Such systems will de-assert OEM1_DATA_AVAIL
1709  * As Dell has no plans to release IPMI 1.5 firmware that *ever*
1717  * IPMI Version = 0x51             IPMI 1.5
1720  * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
1730 	struct ipmi_device_id *id = &smi_info->device_id;  in setup_dell_poweredge_oem_data_handler()
1731 	if (id->manufacturer_id == DELL_IANA_MFR_ID) {  in setup_dell_poweredge_oem_data_handler()
1732 		if (id->device_id       == DELL_POWEREDGE_8G_BMC_DEVICE_ID  &&  in setup_dell_poweredge_oem_data_handler()
1733 		    id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&  in setup_dell_poweredge_oem_data_handler()
1734 		    id->ipmi_version   == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {  in setup_dell_poweredge_oem_data_handler()
1735 			smi_info->oem_data_avail_handler =  in setup_dell_poweredge_oem_data_handler()
1740 			smi_info->oem_data_avail_handler =  in setup_dell_poweredge_oem_data_handler()
1749 	struct ipmi_smi_msg *msg = smi_info->curr_msg;  in return_hosed_msg_badsize()
1752 	msg->rsp[0] = msg->data[0] | 4;  in return_hosed_msg_badsize()
1753 	msg->rsp[1] = msg->data[1];  in return_hosed_msg_badsize()
1754 	msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;  in return_hosed_msg_badsize()
1755 	msg->rsp_size = 3;  in return_hosed_msg_badsize()
1756 	smi_info->curr_msg = NULL;  in return_hosed_msg_badsize()
1762  * @info - smi_info.device_id must be populated
1768  * callers to try again with a different-sized buffer, which succeeds.
1778 	unsigned char *data = smi_info->curr_msg->data;  in dell_poweredge_bt_xaction_handler()
1779 	unsigned int size   = smi_info->curr_msg->data_size;  in dell_poweredge_bt_xaction_handler()
1796  * @info - smi_info.device_id must be filled in already
1804 	struct ipmi_device_id *id = &smi_info->device_id;  in setup_dell_poweredge_bt_xaction_handler()
1805 	if (id->manufacturer_id == DELL_IANA_MFR_ID &&  in setup_dell_poweredge_bt_xaction_handler()
1806 	    smi_info->io.si_type == SI_BT)  in setup_dell_poweredge_bt_xaction_handler()
1812  * @info - smi_info.device_id must be filled in already
1836 	if (smi_info->thread != NULL) {  in stop_timer_and_thread()
1837 		kthread_stop(smi_info->thread);  in stop_timer_and_thread()
1838 		smi_info->thread = NULL;  in stop_timer_and_thread()
1841 	smi_info->timer_can_start = false;  in stop_timer_and_thread()
1842 	del_timer_sync(&smi_info->si_timer);  in stop_timer_and_thread()
1850 		if (e->io.addr_space != info->io.addr_space)  in find_dup_si()
1852 		if (e->io.addr_data == info->io.addr_data) {  in find_dup_si()
1858 			if (info->io.slave_addr && !e->io.slave_addr)  in find_dup_si()
1859 				e->io.slave_addr = info->io.slave_addr;  in find_dup_si()
1873 	 * If the user gave us a hard-coded device at the same  in ipmi_si_add_smi()
1877 	if (io->addr_source != SI_HARDCODED && io->addr_source != SI_HOTMOD &&  in ipmi_si_add_smi()
1878 	    ipmi_si_hardcode_match(io->addr_space, io->addr_data)) {  in ipmi_si_add_smi()
1879 		dev_info(io->dev,  in ipmi_si_add_smi()
1880 			 "Hard-coded device at this address already exists");  in ipmi_si_add_smi()
1881 		return -ENODEV;  in ipmi_si_add_smi()
1884 	if (!io->io_setup) {  in ipmi_si_add_smi()
1885 		if (io->addr_space == IPMI_IO_ADDR_SPACE) {  in ipmi_si_add_smi()
1886 			io->io_setup = ipmi_si_port_setup;  in ipmi_si_add_smi()
1887 		} else if (io->addr_space == IPMI_MEM_ADDR_SPACE) {  in ipmi_si_add_smi()
1888 			io->io_setup = ipmi_si_mem_setup;  in ipmi_si_add_smi()
1890 			return -EINVAL;  in ipmi_si_add_smi()
1896 		return -ENOMEM;  in ipmi_si_add_smi()
1897 	spin_lock_init(&new_smi->si_lock);  in ipmi_si_add_smi()
1899 	new_smi->io = *io;  in ipmi_si_add_smi()
1904 		if (new_smi->io.addr_source == SI_ACPI &&  in ipmi_si_add_smi()
1905 		    dup->io.addr_source == SI_SMBIOS) {  in ipmi_si_add_smi()
1907 			dev_info(dup->io.dev,  in ipmi_si_add_smi()
1908 				 "Removing SMBIOS-specified %s state machine in favor of ACPI\n",  in ipmi_si_add_smi()
1909 				 si_to_str[new_smi->io.si_type]);  in ipmi_si_add_smi()
1912 			dev_info(new_smi->io.dev,  in ipmi_si_add_smi()
1913 				 "%s-specified %s state machine: duplicate\n",  in ipmi_si_add_smi()
1914 				 ipmi_addr_src_to_str(new_smi->io.addr_source),  in ipmi_si_add_smi()
1915 				 si_to_str[new_smi->io.si_type]);  in ipmi_si_add_smi()
1916 			rv = -EBUSY;  in ipmi_si_add_smi()
1922 	pr_info("Adding %s-specified %s state machine\n",  in ipmi_si_add_smi()
1923 		ipmi_addr_src_to_str(new_smi->io.addr_source),  in ipmi_si_add_smi()
1924 		si_to_str[new_smi->io.si_type]);  in ipmi_si_add_smi()
1926 	list_add_tail(&new_smi->link, &smi_infos);  in ipmi_si_add_smi()
1945 	pr_info("Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n",  in try_smi_init()
1946 		ipmi_addr_src_to_str(new_smi->io.addr_source),  in try_smi_init()
1947 		si_to_str[new_smi->io.si_type],  in try_smi_init()
1948 		addr_space_to_str[new_smi->io.addr_space],  in try_smi_init()
1949 		new_smi->io.addr_data,  in try_smi_init()
1950 		new_smi->io.slave_addr, new_smi->io.irq);  in try_smi_init()
1952 	switch (new_smi->io.si_type) {  in try_smi_init()
1954 		new_smi->handlers = &kcs_smi_handlers;  in try_smi_init()
1958 		new_smi->handlers = &smic_smi_handlers;  in try_smi_init()
1962 		new_smi->handlers = &bt_smi_handlers;  in try_smi_init()
1967 		rv = -EIO;  in try_smi_init()
1971 	new_smi->si_num = smi_num;  in try_smi_init()
1974 	if (!new_smi->io.dev) {  in try_smi_init()
1975 		pr_err("IPMI interface added with no device\n");  in try_smi_init()
1976 		rv = -EIO;  in try_smi_init()
1981 	new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);  in try_smi_init()
1982 	if (!new_smi->si_sm) {  in try_smi_init()
1983 		rv = -ENOMEM;  in try_smi_init()
1986 	new_smi->io.io_size = new_smi->handlers->init_data(new_smi->si_sm,  in try_smi_init()
1987 							   &new_smi->io);  in try_smi_init()
1990 	rv = new_smi->io.io_setup(&new_smi->io);  in try_smi_init()
1992 		dev_err(new_smi->io.dev, "Could not set up I/O space\n");  in try_smi_init()
1996 	/* Do low-level detection first. */  in try_smi_init()
1997 	if (new_smi->handlers->detect(new_smi->si_sm)) {  in try_smi_init()
1998 		if (new_smi->io.addr_source)  in try_smi_init()
1999 			dev_err(new_smi->io.dev,  in try_smi_init()
2001 		rv = -ENODEV;  in try_smi_init()
2011 		if (new_smi->io.addr_source)  in try_smi_init()
2012 			dev_err(new_smi->io.dev,  in try_smi_init()
2021 	new_smi->waiting_msg = NULL;  in try_smi_init()
2022 	new_smi->curr_msg = NULL;  in try_smi_init()
2023 	atomic_set(&new_smi->req_events, 0);  in try_smi_init()
2024 	new_smi->run_to_completion = false;  in try_smi_init()
2026 		atomic_set(&new_smi->stats[i], 0);  in try_smi_init()
2028 	new_smi->interrupt_disabled = true;  in try_smi_init()
2029 	atomic_set(&new_smi->need_watch, 0);  in try_smi_init()
2033 		new_smi->has_event_buffer = true;  in try_smi_init()
2042 	 * IRQ is defined to be set when non-zero.  req_events will  in try_smi_init()
2045 	if (new_smi->io.irq) {  in try_smi_init()
2046 		new_smi->interrupt_disabled = false;  in try_smi_init()
2047 		atomic_set(&new_smi->req_events, 1);  in try_smi_init()
2050 	dev_set_drvdata(new_smi->io.dev, new_smi);  in try_smi_init()
2051 	rv = device_add_group(new_smi->io.dev, &ipmi_si_dev_attr_group);  in try_smi_init()
2053 		dev_err(new_smi->io.dev,  in try_smi_init()
2058 	new_smi->dev_group_added = true;  in try_smi_init()
2062 			       new_smi->io.dev,  in try_smi_init()
2063 			       new_smi->io.slave_addr);  in try_smi_init()
2065 		dev_err(new_smi->io.dev,  in try_smi_init()
2074 	dev_info(new_smi->io.dev, "IPMI %s interface initialized\n",  in try_smi_init()
2075 		 si_to_str[new_smi->io.si_type]);  in try_smi_init()
2077 	WARN_ON(new_smi->io.dev->init_name != NULL);  in try_smi_init()
2080 	if (rv && new_smi->io.io_cleanup) {  in try_smi_init()
2081 		new_smi->io.io_cleanup(&new_smi->io);  in try_smi_init()
2082 		new_smi->io.io_cleanup = NULL;  in try_smi_init()
2098 	pr_info("IPMI System Interface driver\n");  in init_ipmi_si()
2115 		if (e->io.irq && (!type || e->io.addr_source == type)) {  in init_ipmi_si()
2117 				type = e->io.addr_source;  in init_ipmi_si()
2129 		if (!e->io.irq && (!type || e->io.addr_source == type)) {  in init_ipmi_si()
2131 				type = e->io.addr_source;  in init_ipmi_si()
2148 		return -ENODEV;  in init_ipmi_si()
2160 	if (smi_info->dev_group_added) {  in shutdown_smi()
2161 		device_remove_group(smi_info->io.dev, &ipmi_si_dev_attr_group);  in shutdown_smi()
2162 		smi_info->dev_group_added = false;  in shutdown_smi()
2164 	if (smi_info->io.dev)  in shutdown_smi()
2165 		dev_set_drvdata(smi_info->io.dev, NULL);  in shutdown_smi()
2171 	smi_info->interrupt_disabled = true;  in shutdown_smi()
2172 	if (smi_info->io.irq_cleanup) {  in shutdown_smi()
2173 		smi_info->io.irq_cleanup(&smi_info->io);  in shutdown_smi()
2174 		smi_info->io.irq_cleanup = NULL;  in shutdown_smi()
2190 	while (smi_info->curr_msg || (smi_info->si_state != SI_NORMAL)) {  in shutdown_smi()
2194 	if (smi_info->handlers)  in shutdown_smi()
2196 	while (smi_info->curr_msg || (smi_info->si_state != SI_NORMAL)) {  in shutdown_smi()
2200 	if (smi_info->handlers)  in shutdown_smi()
2201 		smi_info->handlers->cleanup(smi_info->si_sm);  in shutdown_smi()
2203 	if (smi_info->io.io_cleanup) {  in shutdown_smi()
2204 		smi_info->io.io_cleanup(&smi_info->io);  in shutdown_smi()
2205 		smi_info->io.io_cleanup = NULL;  in shutdown_smi()
2208 	kfree(smi_info->si_sm);  in shutdown_smi()
2209 	smi_info->si_sm = NULL;  in shutdown_smi()
2211 	smi_info->intf = NULL;  in shutdown_smi()
2216  * smi_info->intf check.
2223 	list_del(&smi_info->link);  in cleanup_one_si()
2224 	ipmi_unregister_smi(smi_info->intf);  in cleanup_one_si()
2234 		if (e->io.dev == dev) {  in ipmi_si_remove_by_dev()
2251 		if (e->io.addr_space != addr_space)  in ipmi_si_remove_by_data()
2253 		if (e->io.si_type != si_type)  in ipmi_si_remove_by_data()
2255 		if (e->io.addr_data == addr) {  in ipmi_si_remove_by_data()
2256 			dev = get_device(e->io.dev);  in ipmi_si_remove_by_data()
2288 MODULE_ALIAS("platform:dmi-ipmi-si");
2291 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT system interfaces.");