Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
new file mode 100644
index 0000000..29de259
--- /dev/null
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -0,0 +1,2359 @@
+/*
+ * ipmi_si.c
+ *
+ * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
+ * BT).
+ *
+ * Author: MontaVista Software, Inc.
+ * Corey Minyard <minyard@mvista.com>
+ * source@mvista.com
+ *
+ * Copyright 2002 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * This file holds the "policy" for the interface to the SMI state
+ * machine. It does the configuration, handles timers and interrupts,
+ * and drives the real SMI state machine.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <asm/system.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <asm/irq.h>
+#ifdef CONFIG_HIGH_RES_TIMERS
+#include <linux/hrtime.h>
+# if defined(schedule_next_int)
+/* Old high-res timer code, do translations. */
+# define get_arch_cycles(a) quick_update_jiffies_sub(a)
+# define arch_cycles_per_jiffy cycles_per_jiffies
+# endif
+static inline void add_usec_to_timer(struct timer_list *t, long v)
+{
+ t->sub_expires += nsec_to_arch_cycle(v * 1000);
+ while (t->sub_expires >= arch_cycles_per_jiffy)
+ {
+ t->expires++;
+ t->sub_expires -= arch_cycles_per_jiffy;
+ }
+}
+#endif
+#include <linux/interrupt.h>
+#include <linux/rcupdate.h>
+#include <linux/ipmi_smi.h>
+#include <asm/io.h>
+#include "ipmi_si_sm.h"
+#include <linux/init.h>
+
+#define IPMI_SI_VERSION "v33"
+
+/* Measure times between events in the driver. */
+#undef DEBUG_TIMING
+
+/* Call every 10 ms. */
+#define SI_TIMEOUT_TIME_USEC 10000
+#define SI_USEC_PER_JIFFY (1000000/HZ)
+#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
+#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
+ short timeout */
+
+enum si_intf_state {
+ SI_NORMAL,
+ SI_GETTING_FLAGS,
+ SI_GETTING_EVENTS,
+ SI_CLEARING_FLAGS,
+ SI_CLEARING_FLAGS_THEN_SET_IRQ,
+ SI_GETTING_MESSAGES,
+ SI_ENABLE_INTERRUPTS1,
+ SI_ENABLE_INTERRUPTS2
+ /* FIXME - add watchdog stuff. */
+};
+
+enum si_type {
+ SI_KCS, SI_SMIC, SI_BT
+};
+
+struct smi_info
+{
+ ipmi_smi_t intf;
+ struct si_sm_data *si_sm;
+ struct si_sm_handlers *handlers;
+ enum si_type si_type;
+ spinlock_t si_lock;
+ spinlock_t msg_lock;
+ struct list_head xmit_msgs;
+ struct list_head hp_xmit_msgs;
+ struct ipmi_smi_msg *curr_msg;
+ enum si_intf_state si_state;
+
+ /* Used to handle the various types of I/O that can occur with
+ IPMI */
+ struct si_sm_io io;
+ int (*io_setup)(struct smi_info *info);
+ void (*io_cleanup)(struct smi_info *info);
+ int (*irq_setup)(struct smi_info *info);
+ void (*irq_cleanup)(struct smi_info *info);
+ unsigned int io_size;
+
+ /* Flags from the last GET_MSG_FLAGS command, used when an ATTN
+ is set to hold the flags until we are done handling everything
+ from the flags. */
+#define RECEIVE_MSG_AVAIL 0x01
+#define EVENT_MSG_BUFFER_FULL 0x02
+#define WDT_PRE_TIMEOUT_INT 0x08
+ unsigned char msg_flags;
+
+ /* If set to true, this will request events the next time the
+ state machine is idle. */
+ atomic_t req_events;
+
+ /* If true, run the state machine to completion on every send
+ call. Generally used after a panic to make sure stuff goes
+ out. */
+ int run_to_completion;
+
+ /* The I/O port of an SI interface. */
+ int port;
+
+ /* The space between start addresses of the two ports. For
+ instance, if the first port is 0xca2 and the spacing is 4, then
+ the second port is 0xca6. */
+ unsigned int spacing;
+
+ /* zero if no irq; */
+ int irq;
+
+ /* The timer for this si. */
+ struct timer_list si_timer;
+
+ /* The time (in jiffies) the last timeout occurred at. */
+ unsigned long last_timeout_jiffies;
+
+ /* Used to gracefully stop the timer without race conditions. */
+ volatile int stop_operation;
+ volatile int timer_stopped;
+
+ /* The driver will disable interrupts when it gets into a
+ situation where it cannot handle messages due to lack of
+ memory. Once that situation clears up, it will re-enable
+ interrupts. */
+ int interrupt_disabled;
+
+ unsigned char ipmi_si_dev_rev;
+ unsigned char ipmi_si_fw_rev_major;
+ unsigned char ipmi_si_fw_rev_minor;
+ unsigned char ipmi_version_major;
+ unsigned char ipmi_version_minor;
+
+ /* Slave address, could be reported from DMI. */
+ unsigned char slave_addr;
+
+ /* Counters and things for the proc filesystem. */
+ spinlock_t count_lock;
+ unsigned long short_timeouts;
+ unsigned long long_timeouts;
+ unsigned long timeout_restarts;
+ unsigned long idles;
+ unsigned long interrupts;
+ unsigned long attentions;
+ unsigned long flag_fetches;
+ unsigned long hosed_count;
+ unsigned long complete_transactions;
+ unsigned long events;
+ unsigned long watchdog_pretimeouts;
+ unsigned long incoming_messages;
+};
+
+static void si_restart_short_timer(struct smi_info *smi_info);
+
+static void deliver_recv_msg(struct smi_info *smi_info,
+ struct ipmi_smi_msg *msg)
+{
+ /* Deliver the message to the upper layer with the lock
+ released. */
+ spin_unlock(&(smi_info->si_lock));
+ ipmi_smi_msg_received(smi_info->intf, msg);
+ spin_lock(&(smi_info->si_lock));
+}
+
+static void return_hosed_msg(struct smi_info *smi_info)
+{
+ struct ipmi_smi_msg *msg = smi_info->curr_msg;
+
+ /* Make it a reponse */
+ msg->rsp[0] = msg->data[0] | 4;
+ msg->rsp[1] = msg->data[1];
+ msg->rsp[2] = 0xFF; /* Unknown error. */
+ msg->rsp_size = 3;
+
+ smi_info->curr_msg = NULL;
+ deliver_recv_msg(smi_info, msg);
+}
+
+static enum si_sm_result start_next_msg(struct smi_info *smi_info)
+{
+ int rv;
+ struct list_head *entry = NULL;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+#endif
+
+ /* No need to save flags, we aleady have interrupts off and we
+ already hold the SMI lock. */
+ spin_lock(&(smi_info->msg_lock));
+
+ /* Pick the high priority queue first. */
+ if (! list_empty(&(smi_info->hp_xmit_msgs))) {
+ entry = smi_info->hp_xmit_msgs.next;
+ } else if (! list_empty(&(smi_info->xmit_msgs))) {
+ entry = smi_info->xmit_msgs.next;
+ }
+
+ if (!entry) {
+ smi_info->curr_msg = NULL;
+ rv = SI_SM_IDLE;
+ } else {
+ int err;
+
+ list_del(entry);
+ smi_info->curr_msg = list_entry(entry,
+ struct ipmi_smi_msg,
+ link);
+#ifdef DEBUG_TIMING
+ do_gettimeofday(&t);
+ printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+ err = smi_info->handlers->start_transaction(
+ smi_info->si_sm,
+ smi_info->curr_msg->data,
+ smi_info->curr_msg->data_size);
+ if (err) {
+ return_hosed_msg(smi_info);
+ }
+
+ rv = SI_SM_CALL_WITHOUT_DELAY;
+ }
+ spin_unlock(&(smi_info->msg_lock));
+
+ return rv;
+}
+
+static void start_enable_irq(struct smi_info *smi_info)
+{
+ unsigned char msg[2];
+
+ /* If we are enabling interrupts, we have to tell the
+ BMC to use them. */
+ msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
+
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
+ smi_info->si_state = SI_ENABLE_INTERRUPTS1;
+}
+
+static void start_clear_flags(struct smi_info *smi_info)
+{
+ unsigned char msg[3];
+
+ /* Make sure the watchdog pre-timeout flag is not set at startup. */
+ msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
+ msg[2] = WDT_PRE_TIMEOUT_INT;
+
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
+ smi_info->si_state = SI_CLEARING_FLAGS;
+}
+
+/* When we have a situtaion where we run out of memory and cannot
+ allocate messages, we just leave them in the BMC and run the system
+ polled until we can allocate some memory. Once we have some
+ memory, we will re-enable the interrupt. */
+static inline void disable_si_irq(struct smi_info *smi_info)
+{
+ if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
+ disable_irq_nosync(smi_info->irq);
+ smi_info->interrupt_disabled = 1;
+ }
+}
+
+static inline void enable_si_irq(struct smi_info *smi_info)
+{
+ if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
+ enable_irq(smi_info->irq);
+ smi_info->interrupt_disabled = 0;
+ }
+}
+
+static void handle_flags(struct smi_info *smi_info)
+{
+ if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
+ /* Watchdog pre-timeout */
+ spin_lock(&smi_info->count_lock);
+ smi_info->watchdog_pretimeouts++;
+ spin_unlock(&smi_info->count_lock);
+
+ start_clear_flags(smi_info);
+ smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
+ spin_unlock(&(smi_info->si_lock));
+ ipmi_smi_watchdog_pretimeout(smi_info->intf);
+ spin_lock(&(smi_info->si_lock));
+ } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
+ /* Messages available. */
+ smi_info->curr_msg = ipmi_alloc_smi_msg();
+ if (!smi_info->curr_msg) {
+ disable_si_irq(smi_info);
+ smi_info->si_state = SI_NORMAL;
+ return;
+ }
+ enable_si_irq(smi_info);
+
+ smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
+ smi_info->curr_msg->data_size = 2;
+
+ smi_info->handlers->start_transaction(
+ smi_info->si_sm,
+ smi_info->curr_msg->data,
+ smi_info->curr_msg->data_size);
+ smi_info->si_state = SI_GETTING_MESSAGES;
+ } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
+ /* Events available. */
+ smi_info->curr_msg = ipmi_alloc_smi_msg();
+ if (!smi_info->curr_msg) {
+ disable_si_irq(smi_info);
+ smi_info->si_state = SI_NORMAL;
+ return;
+ }
+ enable_si_irq(smi_info);
+
+ smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
+ smi_info->curr_msg->data_size = 2;
+
+ smi_info->handlers->start_transaction(
+ smi_info->si_sm,
+ smi_info->curr_msg->data,
+ smi_info->curr_msg->data_size);
+ smi_info->si_state = SI_GETTING_EVENTS;
+ } else {
+ smi_info->si_state = SI_NORMAL;
+ }
+}
+
+static void handle_transaction_done(struct smi_info *smi_info)
+{
+ struct ipmi_smi_msg *msg;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+
+ do_gettimeofday(&t);
+ printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+ switch (smi_info->si_state) {
+ case SI_NORMAL:
+ if (!smi_info->curr_msg)
+ break;
+
+ smi_info->curr_msg->rsp_size
+ = smi_info->handlers->get_result(
+ smi_info->si_sm,
+ smi_info->curr_msg->rsp,
+ IPMI_MAX_MSG_LENGTH);
+
+ /* Do this here becase deliver_recv_msg() releases the
+ lock, and a new message can be put in during the
+ time the lock is released. */
+ msg = smi_info->curr_msg;
+ smi_info->curr_msg = NULL;
+ deliver_recv_msg(smi_info, msg);
+ break;
+
+ case SI_GETTING_FLAGS:
+ {
+ unsigned char msg[4];
+ unsigned int len;
+
+ /* We got the flags from the SMI, now handle them. */
+ len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
+ if (msg[2] != 0) {
+ /* Error fetching flags, just give up for
+ now. */
+ smi_info->si_state = SI_NORMAL;
+ } else if (len < 4) {
+ /* Hmm, no flags. That's technically illegal, but
+ don't use uninitialized data. */
+ smi_info->si_state = SI_NORMAL;
+ } else {
+ smi_info->msg_flags = msg[3];
+ handle_flags(smi_info);
+ }
+ break;
+ }
+
+ case SI_CLEARING_FLAGS:
+ case SI_CLEARING_FLAGS_THEN_SET_IRQ:
+ {
+ unsigned char msg[3];
+
+ /* We cleared the flags. */
+ smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
+ if (msg[2] != 0) {
+ /* Error clearing flags */
+ printk(KERN_WARNING
+ "ipmi_si: Error clearing flags: %2.2x\n",
+ msg[2]);
+ }
+ if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
+ start_enable_irq(smi_info);
+ else
+ smi_info->si_state = SI_NORMAL;
+ break;
+ }
+
+ case SI_GETTING_EVENTS:
+ {
+ smi_info->curr_msg->rsp_size
+ = smi_info->handlers->get_result(
+ smi_info->si_sm,
+ smi_info->curr_msg->rsp,
+ IPMI_MAX_MSG_LENGTH);
+
+ /* Do this here becase deliver_recv_msg() releases the
+ lock, and a new message can be put in during the
+ time the lock is released. */
+ msg = smi_info->curr_msg;
+ smi_info->curr_msg = NULL;
+ if (msg->rsp[2] != 0) {
+ /* Error getting event, probably done. */
+ msg->done(msg);
+
+ /* Take off the event flag. */
+ smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
+ handle_flags(smi_info);
+ } else {
+ spin_lock(&smi_info->count_lock);
+ smi_info->events++;
+ spin_unlock(&smi_info->count_lock);
+
+ /* Do this before we deliver the message
+ because delivering the message releases the
+ lock and something else can mess with the
+ state. */
+ handle_flags(smi_info);
+
+ deliver_recv_msg(smi_info, msg);
+ }
+ break;
+ }
+
+ case SI_GETTING_MESSAGES:
+ {
+ smi_info->curr_msg->rsp_size
+ = smi_info->handlers->get_result(
+ smi_info->si_sm,
+ smi_info->curr_msg->rsp,
+ IPMI_MAX_MSG_LENGTH);
+
+ /* Do this here becase deliver_recv_msg() releases the
+ lock, and a new message can be put in during the
+ time the lock is released. */
+ msg = smi_info->curr_msg;
+ smi_info->curr_msg = NULL;
+ if (msg->rsp[2] != 0) {
+ /* Error getting event, probably done. */
+ msg->done(msg);
+
+ /* Take off the msg flag. */
+ smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
+ handle_flags(smi_info);
+ } else {
+ spin_lock(&smi_info->count_lock);
+ smi_info->incoming_messages++;
+ spin_unlock(&smi_info->count_lock);
+
+ /* Do this before we deliver the message
+ because delivering the message releases the
+ lock and something else can mess with the
+ state. */
+ handle_flags(smi_info);
+
+ deliver_recv_msg(smi_info, msg);
+ }
+ break;
+ }
+
+ case SI_ENABLE_INTERRUPTS1:
+ {
+ unsigned char msg[4];
+
+ /* We got the flags from the SMI, now handle them. */
+ smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
+ if (msg[2] != 0) {
+ printk(KERN_WARNING
+ "ipmi_si: Could not enable interrupts"
+ ", failed get, using polled mode.\n");
+ smi_info->si_state = SI_NORMAL;
+ } else {
+ msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
+ msg[2] = msg[3] | 1; /* enable msg queue int */
+ smi_info->handlers->start_transaction(
+ smi_info->si_sm, msg, 3);
+ smi_info->si_state = SI_ENABLE_INTERRUPTS2;
+ }
+ break;
+ }
+
+ case SI_ENABLE_INTERRUPTS2:
+ {
+ unsigned char msg[4];
+
+ /* We got the flags from the SMI, now handle them. */
+ smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
+ if (msg[2] != 0) {
+ printk(KERN_WARNING
+ "ipmi_si: Could not enable interrupts"
+ ", failed set, using polled mode.\n");
+ }
+ smi_info->si_state = SI_NORMAL;
+ break;
+ }
+ }
+}
+
+/* Called on timeouts and events. Timeouts should pass the elapsed
+ time, interrupts should pass in zero. */
+static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
+ int time)
+{
+ enum si_sm_result si_sm_result;
+
+ restart:
+ /* There used to be a loop here that waited a little while
+ (around 25us) before giving up. That turned out to be
+ pointless, the minimum delays I was seeing were in the 300us
+ range, which is far too long to wait in an interrupt. So
+ we just run until the state machine tells us something
+ happened or it needs a delay. */
+ si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
+ time = 0;
+ while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
+ {
+ si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
+ }
+
+ if (si_sm_result == SI_SM_TRANSACTION_COMPLETE)
+ {
+ spin_lock(&smi_info->count_lock);
+ smi_info->complete_transactions++;
+ spin_unlock(&smi_info->count_lock);
+
+ handle_transaction_done(smi_info);
+ si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
+ }
+ else if (si_sm_result == SI_SM_HOSED)
+ {
+ spin_lock(&smi_info->count_lock);
+ smi_info->hosed_count++;
+ spin_unlock(&smi_info->count_lock);
+
+ /* Do the before return_hosed_msg, because that
+ releases the lock. */
+ smi_info->si_state = SI_NORMAL;
+ if (smi_info->curr_msg != NULL) {
+ /* If we were handling a user message, format
+ a response to send to the upper layer to
+ tell it about the error. */
+ return_hosed_msg(smi_info);
+ }
+ si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
+ }
+
+ /* We prefer handling attn over new messages. */
+ if (si_sm_result == SI_SM_ATTN)
+ {
+ unsigned char msg[2];
+
+ spin_lock(&smi_info->count_lock);
+ smi_info->attentions++;
+ spin_unlock(&smi_info->count_lock);
+
+ /* Got a attn, send down a get message flags to see
+ what's causing it. It would be better to handle
+ this in the upper layer, but due to the way
+ interrupts work with the SMI, that's not really
+ possible. */
+ msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ msg[1] = IPMI_GET_MSG_FLAGS_CMD;
+
+ smi_info->handlers->start_transaction(
+ smi_info->si_sm, msg, 2);
+ smi_info->si_state = SI_GETTING_FLAGS;
+ goto restart;
+ }
+
+ /* If we are currently idle, try to start the next message. */
+ if (si_sm_result == SI_SM_IDLE) {
+ spin_lock(&smi_info->count_lock);
+ smi_info->idles++;
+ spin_unlock(&smi_info->count_lock);
+
+ si_sm_result = start_next_msg(smi_info);
+ if (si_sm_result != SI_SM_IDLE)
+ goto restart;
+ }
+
+ if ((si_sm_result == SI_SM_IDLE)
+ && (atomic_read(&smi_info->req_events)))
+ {
+ /* We are idle and the upper layer requested that I fetch
+ events, so do so. */
+ unsigned char msg[2];
+
+ spin_lock(&smi_info->count_lock);
+ smi_info->flag_fetches++;
+ spin_unlock(&smi_info->count_lock);
+
+ atomic_set(&smi_info->req_events, 0);
+ msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
+ msg[1] = IPMI_GET_MSG_FLAGS_CMD;
+
+ smi_info->handlers->start_transaction(
+ smi_info->si_sm, msg, 2);
+ smi_info->si_state = SI_GETTING_FLAGS;
+ goto restart;
+ }
+
+ return si_sm_result;
+}
+
+static void sender(void *send_info,
+ struct ipmi_smi_msg *msg,
+ int priority)
+{
+ struct smi_info *smi_info = send_info;
+ enum si_sm_result result;
+ unsigned long flags;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+#endif
+
+ spin_lock_irqsave(&(smi_info->msg_lock), flags);
+#ifdef DEBUG_TIMING
+ do_gettimeofday(&t);
+ printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+
+ if (smi_info->run_to_completion) {
+ /* If we are running to completion, then throw it in
+ the list and run transactions until everything is
+ clear. Priority doesn't matter here. */
+ list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
+
+ /* We have to release the msg lock and claim the smi
+ lock in this case, because of race conditions. */
+ spin_unlock_irqrestore(&(smi_info->msg_lock), flags);
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+ result = smi_event_handler(smi_info, 0);
+ while (result != SI_SM_IDLE) {
+ udelay(SI_SHORT_TIMEOUT_USEC);
+ result = smi_event_handler(smi_info,
+ SI_SHORT_TIMEOUT_USEC);
+ }
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+ return;
+ } else {
+ if (priority > 0) {
+ list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs));
+ } else {
+ list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
+ }
+ }
+ spin_unlock_irqrestore(&(smi_info->msg_lock), flags);
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+ if ((smi_info->si_state == SI_NORMAL)
+ && (smi_info->curr_msg == NULL))
+ {
+ start_next_msg(smi_info);
+ si_restart_short_timer(smi_info);
+ }
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+}
+
+static void set_run_to_completion(void *send_info, int i_run_to_completion)
+{
+ struct smi_info *smi_info = send_info;
+ enum si_sm_result result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+
+ smi_info->run_to_completion = i_run_to_completion;
+ if (i_run_to_completion) {
+ result = smi_event_handler(smi_info, 0);
+ while (result != SI_SM_IDLE) {
+ udelay(SI_SHORT_TIMEOUT_USEC);
+ result = smi_event_handler(smi_info,
+ SI_SHORT_TIMEOUT_USEC);
+ }
+ }
+
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+}
+
+static void poll(void *send_info)
+{
+ struct smi_info *smi_info = send_info;
+
+ smi_event_handler(smi_info, 0);
+}
+
+static void request_events(void *send_info)
+{
+ struct smi_info *smi_info = send_info;
+
+ atomic_set(&smi_info->req_events, 1);
+}
+
+static int initialized = 0;
+
+/* Must be called with interrupts off and with the si_lock held. */
+static void si_restart_short_timer(struct smi_info *smi_info)
+{
+#if defined(CONFIG_HIGH_RES_TIMERS)
+ unsigned long flags;
+ unsigned long jiffies_now;
+
+ if (del_timer(&(smi_info->si_timer))) {
+ /* If we don't delete the timer, then it will go off
+ immediately, anyway. So we only process if we
+ actually delete the timer. */
+
+ /* We already have irqsave on, so no need for it
+ here. */
+ read_lock(&xtime_lock);
+ jiffies_now = jiffies;
+ smi_info->si_timer.expires = jiffies_now;
+ smi_info->si_timer.sub_expires = get_arch_cycles(jiffies_now);
+
+ add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC);
+
+ add_timer(&(smi_info->si_timer));
+ spin_lock_irqsave(&smi_info->count_lock, flags);
+ smi_info->timeout_restarts++;
+ spin_unlock_irqrestore(&smi_info->count_lock, flags);
+ }
+#endif
+}
+
+static void smi_timeout(unsigned long data)
+{
+ struct smi_info *smi_info = (struct smi_info *) data;
+ enum si_sm_result smi_result;
+ unsigned long flags;
+ unsigned long jiffies_now;
+ unsigned long time_diff;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+#endif
+
+ if (smi_info->stop_operation) {
+ smi_info->timer_stopped = 1;
+ return;
+ }
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+#ifdef DEBUG_TIMING
+ do_gettimeofday(&t);
+ printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+ jiffies_now = jiffies;
+ time_diff = ((jiffies_now - smi_info->last_timeout_jiffies)
+ * SI_USEC_PER_JIFFY);
+ smi_result = smi_event_handler(smi_info, time_diff);
+
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+
+ smi_info->last_timeout_jiffies = jiffies_now;
+
+ if ((smi_info->irq) && (! smi_info->interrupt_disabled)) {
+ /* Running with interrupts, only do long timeouts. */
+ smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
+ spin_lock_irqsave(&smi_info->count_lock, flags);
+ smi_info->long_timeouts++;
+ spin_unlock_irqrestore(&smi_info->count_lock, flags);
+ goto do_add_timer;
+ }
+
+ /* If the state machine asks for a short delay, then shorten
+ the timer timeout. */
+ if (smi_result == SI_SM_CALL_WITH_DELAY) {
+ spin_lock_irqsave(&smi_info->count_lock, flags);
+ smi_info->short_timeouts++;
+ spin_unlock_irqrestore(&smi_info->count_lock, flags);
+#if defined(CONFIG_HIGH_RES_TIMERS)
+ read_lock(&xtime_lock);
+ smi_info->si_timer.expires = jiffies;
+ smi_info->si_timer.sub_expires
+ = get_arch_cycles(smi_info->si_timer.expires);
+ read_unlock(&xtime_lock);
+ add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC);
+#else
+ smi_info->si_timer.expires = jiffies + 1;
+#endif
+ } else {
+ spin_lock_irqsave(&smi_info->count_lock, flags);
+ smi_info->long_timeouts++;
+ spin_unlock_irqrestore(&smi_info->count_lock, flags);
+ smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
+#if defined(CONFIG_HIGH_RES_TIMERS)
+ smi_info->si_timer.sub_expires = 0;
+#endif
+ }
+
+ do_add_timer:
+ add_timer(&(smi_info->si_timer));
+}
+
+static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs)
+{
+ struct smi_info *smi_info = data;
+ unsigned long flags;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+#endif
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+
+ spin_lock(&smi_info->count_lock);
+ smi_info->interrupts++;
+ spin_unlock(&smi_info->count_lock);
+
+ if (smi_info->stop_operation)
+ goto out;
+
+#ifdef DEBUG_TIMING
+ do_gettimeofday(&t);
+ printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+ smi_event_handler(smi_info, 0);
+ out:
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+ return IRQ_HANDLED;
+}
+
+static struct ipmi_smi_handlers handlers =
+{
+ .owner = THIS_MODULE,
+ .sender = sender,
+ .request_events = request_events,
+ .set_run_to_completion = set_run_to_completion,
+ .poll = poll,
+};
+
+/* There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
+ a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */
+
+#define SI_MAX_PARMS 4
+#define SI_MAX_DRIVERS ((SI_MAX_PARMS * 2) + 2)
+static struct smi_info *smi_infos[SI_MAX_DRIVERS] =
+{ NULL, NULL, NULL, NULL };
+
+#define DEVICE_NAME "ipmi_si"
+
+#define DEFAULT_KCS_IO_PORT 0xca2
+#define DEFAULT_SMIC_IO_PORT 0xca9
+#define DEFAULT_BT_IO_PORT 0xe4
+#define DEFAULT_REGSPACING 1
+
+static int si_trydefaults = 1;
+static char *si_type[SI_MAX_PARMS];
+#define MAX_SI_TYPE_STR 30
+static char si_type_str[MAX_SI_TYPE_STR];
+static unsigned long addrs[SI_MAX_PARMS];
+static int num_addrs;
+static unsigned int ports[SI_MAX_PARMS];
+static int num_ports;
+static int irqs[SI_MAX_PARMS];
+static int num_irqs;
+static int regspacings[SI_MAX_PARMS];
+static int num_regspacings = 0;
+static int regsizes[SI_MAX_PARMS];
+static int num_regsizes = 0;
+static int regshifts[SI_MAX_PARMS];
+static int num_regshifts = 0;
+static int slave_addrs[SI_MAX_PARMS];
+static int num_slave_addrs = 0;
+
+
+module_param_named(trydefaults, si_trydefaults, bool, 0);
+MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
+ " default scan of the KCS and SMIC interface at the standard"
+ " address");
+module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
+MODULE_PARM_DESC(type, "Defines the type of each interface, each"
+ " interface separated by commas. The types are 'kcs',"
+ " 'smic', and 'bt'. For example si_type=kcs,bt will set"
+ " the first interface to kcs and the second to bt");
+module_param_array(addrs, long, &num_addrs, 0);
+MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
+ " addresses separated by commas. Only use if an interface"
+ " is in memory. Otherwise, set it to zero or leave"
+ " it blank.");
+module_param_array(ports, int, &num_ports, 0);
+MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
+ " addresses separated by commas. Only use if an interface"
+ " is a port. Otherwise, set it to zero or leave"
+ " it blank.");
+module_param_array(irqs, int, &num_irqs, 0);
+MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
+ " addresses separated by commas. Only use if an interface"
+ " has an interrupt. Otherwise, set it to zero or leave"
+ " it blank.");
+module_param_array(regspacings, int, &num_regspacings, 0);
+MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
+ " and each successive register used by the interface. For"
+ " instance, if the start address is 0xca2 and the spacing"
+ " is 2, then the second address is at 0xca4. Defaults"
+ " to 1.");
+module_param_array(regsizes, int, &num_regsizes, 0);
+MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
+ " This should generally be 1, 2, 4, or 8 for an 8-bit,"
+ " 16-bit, 32-bit, or 64-bit register. Use this if you"
+ " the 8-bit IPMI register has to be read from a larger"
+ " register.");
+module_param_array(regshifts, int, &num_regshifts, 0);
+MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
+ " IPMI register, in bits. For instance, if the data"
+ " is read from a 32-bit word and the IPMI data is in"
+ " bit 8-15, then the shift would be 8");
+module_param_array(slave_addrs, int, &num_slave_addrs, 0);
+MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
+ " the controller. Normally this is 0x20, but can be"
+ " overridden by this parm. This is an array indexed"
+ " by interface number.");
+
+
+#define IPMI_MEM_ADDR_SPACE 1
+#define IPMI_IO_ADDR_SPACE 2
+
+#if defined(CONFIG_ACPI_INTERPRETER) || defined(CONFIG_X86) || defined(CONFIG_PCI)
+static int is_new_interface(int intf, u8 addr_space, unsigned long base_addr)
+{
+ int i;
+
+ for (i = 0; i < SI_MAX_PARMS; ++i) {
+ /* Don't check our address. */
+ if (i == intf)
+ continue;
+ if (si_type[i] != NULL) {
+ if ((addr_space == IPMI_MEM_ADDR_SPACE &&
+ base_addr == addrs[i]) ||
+ (addr_space == IPMI_IO_ADDR_SPACE &&
+ base_addr == ports[i]))
+ return 0;
+ }
+ else
+ break;
+ }
+
+ return 1;
+}
+#endif
+
+static int std_irq_setup(struct smi_info *info)
+{
+ int rv;
+
+ if (!info->irq)
+ return 0;
+
+ rv = request_irq(info->irq,
+ si_irq_handler,
+ SA_INTERRUPT,
+ DEVICE_NAME,
+ info);
+ if (rv) {
+ printk(KERN_WARNING
+ "ipmi_si: %s unable to claim interrupt %d,"
+ " running polled\n",
+ DEVICE_NAME, info->irq);
+ info->irq = 0;
+ } else {
+ printk(" Using irq %d\n", info->irq);
+ }
+
+ return rv;
+}
+
+static void std_irq_cleanup(struct smi_info *info)
+{
+ if (!info->irq)
+ return;
+
+ free_irq(info->irq, info);
+}
+
+static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
+{
+ unsigned int *addr = io->info;
+
+ return inb((*addr)+(offset*io->regspacing));
+}
+
+static void port_outb(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ unsigned int *addr = io->info;
+
+ outb(b, (*addr)+(offset * io->regspacing));
+}
+
+static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
+{
+ unsigned int *addr = io->info;
+
+ return (inw((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
+}
+
+static void port_outw(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ unsigned int *addr = io->info;
+
+ outw(b << io->regshift, (*addr)+(offset * io->regspacing));
+}
+
+static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
+{
+ unsigned int *addr = io->info;
+
+ return (inl((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
+}
+
+static void port_outl(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ unsigned int *addr = io->info;
+
+ outl(b << io->regshift, (*addr)+(offset * io->regspacing));
+}
+
+static void port_cleanup(struct smi_info *info)
+{
+ unsigned int *addr = info->io.info;
+ int mapsize;
+
+ if (addr && (*addr)) {
+ mapsize = ((info->io_size * info->io.regspacing)
+ - (info->io.regspacing - info->io.regsize));
+
+ release_region (*addr, mapsize);
+ }
+ kfree(info);
+}
+
+static int port_setup(struct smi_info *info)
+{
+ unsigned int *addr = info->io.info;
+ int mapsize;
+
+ if (!addr || (!*addr))
+ return -ENODEV;
+
+ info->io_cleanup = port_cleanup;
+
+ /* Figure out the actual inb/inw/inl/etc routine to use based
+ upon the register size. */
+ switch (info->io.regsize) {
+ case 1:
+ info->io.inputb = port_inb;
+ info->io.outputb = port_outb;
+ break;
+ case 2:
+ info->io.inputb = port_inw;
+ info->io.outputb = port_outw;
+ break;
+ case 4:
+ info->io.inputb = port_inl;
+ info->io.outputb = port_outl;
+ break;
+ default:
+ printk("ipmi_si: Invalid register size: %d\n",
+ info->io.regsize);
+ return -EINVAL;
+ }
+
+ /* Calculate the total amount of memory to claim. This is an
+ * unusual looking calculation, but it avoids claiming any
+ * more memory than it has to. It will claim everything
+ * between the first address to the end of the last full
+ * register. */
+ mapsize = ((info->io_size * info->io.regspacing)
+ - (info->io.regspacing - info->io.regsize));
+
+ if (request_region(*addr, mapsize, DEVICE_NAME) == NULL)
+ return -EIO;
+ return 0;
+}
+
+static int try_init_port(int intf_num, struct smi_info **new_info)
+{
+ struct smi_info *info;
+
+ if (!ports[intf_num])
+ return -ENODEV;
+
+ if (!is_new_interface(intf_num, IPMI_IO_ADDR_SPACE,
+ ports[intf_num]))
+ return -ENODEV;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ printk(KERN_ERR "ipmi_si: Could not allocate SI data (1)\n");
+ return -ENOMEM;
+ }
+ memset(info, 0, sizeof(*info));
+
+ info->io_setup = port_setup;
+ info->io.info = &(ports[intf_num]);
+ info->io.addr = NULL;
+ info->io.regspacing = regspacings[intf_num];
+ if (!info->io.regspacing)
+ info->io.regspacing = DEFAULT_REGSPACING;
+ info->io.regsize = regsizes[intf_num];
+ if (!info->io.regsize)
+ info->io.regsize = DEFAULT_REGSPACING;
+ info->io.regshift = regshifts[intf_num];
+ info->irq = 0;
+ info->irq_setup = NULL;
+ *new_info = info;
+
+ if (si_type[intf_num] == NULL)
+ si_type[intf_num] = "kcs";
+
+ printk("ipmi_si: Trying \"%s\" at I/O port 0x%x\n",
+ si_type[intf_num], ports[intf_num]);
+ return 0;
+}
+
+static unsigned char mem_inb(struct si_sm_io *io, unsigned int offset)
+{
+ return readb((io->addr)+(offset * io->regspacing));
+}
+
+static void mem_outb(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ writeb(b, (io->addr)+(offset * io->regspacing));
+}
+
+static unsigned char mem_inw(struct si_sm_io *io, unsigned int offset)
+{
+ return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
+ && 0xff;
+}
+
+static void mem_outw(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
+}
+
+static unsigned char mem_inl(struct si_sm_io *io, unsigned int offset)
+{
+ return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
+ && 0xff;
+}
+
+static void mem_outl(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
+}
+
+#ifdef readq
+static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
+{
+ return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
+ && 0xff;
+}
+
+static void mem_outq(struct si_sm_io *io, unsigned int offset,
+ unsigned char b)
+{
+ writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
+}
+#endif
+
+static void mem_cleanup(struct smi_info *info)
+{
+ unsigned long *addr = info->io.info;
+ int mapsize;
+
+ if (info->io.addr) {
+ iounmap(info->io.addr);
+
+ mapsize = ((info->io_size * info->io.regspacing)
+ - (info->io.regspacing - info->io.regsize));
+
+ release_mem_region(*addr, mapsize);
+ }
+ kfree(info);
+}
+
+static int mem_setup(struct smi_info *info)
+{
+ unsigned long *addr = info->io.info;
+ int mapsize;
+
+ if (!addr || (!*addr))
+ return -ENODEV;
+
+ info->io_cleanup = mem_cleanup;
+
+ /* Figure out the actual readb/readw/readl/etc routine to use based
+ upon the register size. */
+ switch (info->io.regsize) {
+ case 1:
+ info->io.inputb = mem_inb;
+ info->io.outputb = mem_outb;
+ break;
+ case 2:
+ info->io.inputb = mem_inw;
+ info->io.outputb = mem_outw;
+ break;
+ case 4:
+ info->io.inputb = mem_inl;
+ info->io.outputb = mem_outl;
+ break;
+#ifdef readq
+ case 8:
+ info->io.inputb = mem_inq;
+ info->io.outputb = mem_outq;
+ break;
+#endif
+ default:
+ printk("ipmi_si: Invalid register size: %d\n",
+ info->io.regsize);
+ return -EINVAL;
+ }
+
+ /* Calculate the total amount of memory to claim. This is an
+ * unusual looking calculation, but it avoids claiming any
+ * more memory than it has to. It will claim everything
+ * between the first address to the end of the last full
+ * register. */
+ mapsize = ((info->io_size * info->io.regspacing)
+ - (info->io.regspacing - info->io.regsize));
+
+ if (request_mem_region(*addr, mapsize, DEVICE_NAME) == NULL)
+ return -EIO;
+
+ info->io.addr = ioremap(*addr, mapsize);
+ if (info->io.addr == NULL) {
+ release_mem_region(*addr, mapsize);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int try_init_mem(int intf_num, struct smi_info **new_info)
+{
+ struct smi_info *info;
+
+ if (!addrs[intf_num])
+ return -ENODEV;
+
+ if (!is_new_interface(intf_num, IPMI_MEM_ADDR_SPACE,
+ addrs[intf_num]))
+ return -ENODEV;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ printk(KERN_ERR "ipmi_si: Could not allocate SI data (2)\n");
+ return -ENOMEM;
+ }
+ memset(info, 0, sizeof(*info));
+
+ info->io_setup = mem_setup;
+ info->io.info = &addrs[intf_num];
+ info->io.addr = NULL;
+ info->io.regspacing = regspacings[intf_num];
+ if (!info->io.regspacing)
+ info->io.regspacing = DEFAULT_REGSPACING;
+ info->io.regsize = regsizes[intf_num];
+ if (!info->io.regsize)
+ info->io.regsize = DEFAULT_REGSPACING;
+ info->io.regshift = regshifts[intf_num];
+ info->irq = 0;
+ info->irq_setup = NULL;
+ *new_info = info;
+
+ if (si_type[intf_num] == NULL)
+ si_type[intf_num] = "kcs";
+
+ printk("ipmi_si: Trying \"%s\" at memory address 0x%lx\n",
+ si_type[intf_num], addrs[intf_num]);
+ return 0;
+}
+
+
+#ifdef CONFIG_ACPI_INTERPRETER
+
+#include <linux/acpi.h>
+
+/* Once we get an ACPI failure, we don't try any more, because we go
+ through the tables sequentially. Once we don't find a table, there
+ are no more. */
+static int acpi_failure = 0;
+
+/* For GPE-type interrupts. */
+static u32 ipmi_acpi_gpe(void *context)
+{
+ struct smi_info *smi_info = context;
+ unsigned long flags;
+#ifdef DEBUG_TIMING
+ struct timeval t;
+#endif
+
+ spin_lock_irqsave(&(smi_info->si_lock), flags);
+
+ spin_lock(&smi_info->count_lock);
+ smi_info->interrupts++;
+ spin_unlock(&smi_info->count_lock);
+
+ if (smi_info->stop_operation)
+ goto out;
+
+#ifdef DEBUG_TIMING
+ do_gettimeofday(&t);
+ printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
+#endif
+ smi_event_handler(smi_info, 0);
+ out:
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
+
+ return ACPI_INTERRUPT_HANDLED;
+}
+
+static int acpi_gpe_irq_setup(struct smi_info *info)
+{
+ acpi_status status;
+
+ if (!info->irq)
+ return 0;
+
+ /* FIXME - is level triggered right? */
+ status = acpi_install_gpe_handler(NULL,
+ info->irq,
+ ACPI_GPE_LEVEL_TRIGGERED,
+ &ipmi_acpi_gpe,
+ info);
+ if (status != AE_OK) {
+ printk(KERN_WARNING
+ "ipmi_si: %s unable to claim ACPI GPE %d,"
+ " running polled\n",
+ DEVICE_NAME, info->irq);
+ info->irq = 0;
+ return -EINVAL;
+ } else {
+ printk(" Using ACPI GPE %d\n", info->irq);
+ return 0;
+ }
+}
+
+static void acpi_gpe_irq_cleanup(struct smi_info *info)
+{
+ if (!info->irq)
+ return;
+
+ acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
+}
+
+/*
+ * Defined at
+ * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf
+ */
+struct SPMITable {
+ s8 Signature[4];
+ u32 Length;
+ u8 Revision;
+ u8 Checksum;
+ s8 OEMID[6];
+ s8 OEMTableID[8];
+ s8 OEMRevision[4];
+ s8 CreatorID[4];
+ s8 CreatorRevision[4];
+ u8 InterfaceType;
+ u8 IPMIlegacy;
+ s16 SpecificationRevision;
+
+ /*
+ * Bit 0 - SCI interrupt supported
+ * Bit 1 - I/O APIC/SAPIC
+ */
+ u8 InterruptType;
+
+ /* If bit 0 of InterruptType is set, then this is the SCI
+ interrupt in the GPEx_STS register. */
+ u8 GPE;
+
+ s16 Reserved;
+
+ /* If bit 1 of InterruptType is set, then this is the I/O
+ APIC/SAPIC interrupt. */
+ u32 GlobalSystemInterrupt;
+
+ /* The actual register address. */
+ struct acpi_generic_address addr;
+
+ u8 UID[4];
+
+ s8 spmi_id[1]; /* A '\0' terminated array starts here. */
+};
+
+static int try_init_acpi(int intf_num, struct smi_info **new_info)
+{
+ struct smi_info *info;
+ acpi_status status;
+ struct SPMITable *spmi;
+ char *io_type;
+ u8 addr_space;
+
+ if (acpi_failure)
+ return -ENODEV;
+
+ status = acpi_get_firmware_table("SPMI", intf_num+1,
+ ACPI_LOGICAL_ADDRESSING,
+ (struct acpi_table_header **) &spmi);
+ if (status != AE_OK) {
+ acpi_failure = 1;
+ return -ENODEV;
+ }
+
+ if (spmi->IPMIlegacy != 1) {
+ printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
+ return -ENODEV;
+ }
+
+ if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ addr_space = IPMI_MEM_ADDR_SPACE;
+ else
+ addr_space = IPMI_IO_ADDR_SPACE;
+ if (!is_new_interface(-1, addr_space, spmi->addr.address))
+ return -ENODEV;
+
+ if (!spmi->addr.register_bit_width) {
+ acpi_failure = 1;
+ return -ENODEV;
+ }
+
+ /* Figure out the interface type. */
+ switch (spmi->InterfaceType)
+ {
+ case 1: /* KCS */
+ si_type[intf_num] = "kcs";
+ break;
+
+ case 2: /* SMIC */
+ si_type[intf_num] = "smic";
+ break;
+
+ case 3: /* BT */
+ si_type[intf_num] = "bt";
+ break;
+
+ default:
+ printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
+ spmi->InterfaceType);
+ return -EIO;
+ }
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
+ return -ENOMEM;
+ }
+ memset(info, 0, sizeof(*info));
+
+ if (spmi->InterruptType & 1) {
+ /* We've got a GPE interrupt. */
+ info->irq = spmi->GPE;
+ info->irq_setup = acpi_gpe_irq_setup;
+ info->irq_cleanup = acpi_gpe_irq_cleanup;
+ } else if (spmi->InterruptType & 2) {
+ /* We've got an APIC/SAPIC interrupt. */
+ info->irq = spmi->GlobalSystemInterrupt;
+ info->irq_setup = std_irq_setup;
+ info->irq_cleanup = std_irq_cleanup;
+ } else {
+ /* Use the default interrupt setting. */
+ info->irq = 0;
+ info->irq_setup = NULL;
+ }
+
+ regspacings[intf_num] = spmi->addr.register_bit_width / 8;
+ info->io.regspacing = spmi->addr.register_bit_width / 8;
+ regsizes[intf_num] = regspacings[intf_num];
+ info->io.regsize = regsizes[intf_num];
+ regshifts[intf_num] = spmi->addr.register_bit_offset;
+ info->io.regshift = regshifts[intf_num];
+
+ if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+ io_type = "memory";
+ info->io_setup = mem_setup;
+ addrs[intf_num] = spmi->addr.address;
+ info->io.info = &(addrs[intf_num]);
+ } else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
+ io_type = "I/O";
+ info->io_setup = port_setup;
+ ports[intf_num] = spmi->addr.address;
+ info->io.info = &(ports[intf_num]);
+ } else {
+ kfree(info);
+ printk("ipmi_si: Unknown ACPI I/O Address type\n");
+ return -EIO;
+ }
+
+ *new_info = info;
+
+ printk("ipmi_si: ACPI/SPMI specifies \"%s\" %s SI @ 0x%lx\n",
+ si_type[intf_num], io_type, (unsigned long) spmi->addr.address);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_X86
+typedef struct dmi_ipmi_data
+{
+ u8 type;
+ u8 addr_space;
+ unsigned long base_addr;
+ u8 irq;
+ u8 offset;
+ u8 slave_addr;
+} dmi_ipmi_data_t;
+
+static dmi_ipmi_data_t dmi_data[SI_MAX_DRIVERS];
+static int dmi_data_entries;
+
+typedef struct dmi_header
+{
+ u8 type;
+ u8 length;
+ u16 handle;
+} dmi_header_t;
+
+static int decode_dmi(dmi_header_t *dm, int intf_num)
+{
+ u8 *data = (u8 *)dm;
+ unsigned long base_addr;
+ u8 reg_spacing;
+ u8 len = dm->length;
+ dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
+
+ ipmi_data->type = data[4];
+
+ memcpy(&base_addr, data+8, sizeof(unsigned long));
+ if (len >= 0x11) {
+ if (base_addr & 1) {
+ /* I/O */
+ base_addr &= 0xFFFE;
+ ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
+ }
+ else {
+ /* Memory */
+ ipmi_data->addr_space = IPMI_MEM_ADDR_SPACE;
+ }
+ /* If bit 4 of byte 0x10 is set, then the lsb for the address
+ is odd. */
+ ipmi_data->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
+
+ ipmi_data->irq = data[0x11];
+
+ /* The top two bits of byte 0x10 hold the register spacing. */
+ reg_spacing = (data[0x10] & 0xC0) >> 6;
+ switch(reg_spacing){
+ case 0x00: /* Byte boundaries */
+ ipmi_data->offset = 1;
+ break;
+ case 0x01: /* 32-bit boundaries */
+ ipmi_data->offset = 4;
+ break;
+ case 0x02: /* 16-byte boundaries */
+ ipmi_data->offset = 16;
+ break;
+ default:
+ /* Some other interface, just ignore it. */
+ return -EIO;
+ }
+ } else {
+ /* Old DMI spec. */
+ ipmi_data->base_addr = base_addr;
+ ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
+ ipmi_data->offset = 1;
+ }
+
+ ipmi_data->slave_addr = data[6];
+
+ if (is_new_interface(-1, ipmi_data->addr_space,ipmi_data->base_addr)) {
+ dmi_data_entries++;
+ return 0;
+ }
+
+ memset(ipmi_data, 0, sizeof(dmi_ipmi_data_t));
+
+ return -1;
+}
+
+static int dmi_table(u32 base, int len, int num)
+{
+ u8 *buf;
+ struct dmi_header *dm;
+ u8 *data;
+ int i=1;
+ int status=-1;
+ int intf_num = 0;
+
+ buf = ioremap(base, len);
+ if(buf==NULL)
+ return -1;
+
+ data = buf;
+
+ while(i<num && (data - buf) < len)
+ {
+ dm=(dmi_header_t *)data;
+
+ if((data-buf+dm->length) >= len)
+ break;
+
+ if (dm->type == 38) {
+ if (decode_dmi(dm, intf_num) == 0) {
+ intf_num++;
+ if (intf_num >= SI_MAX_DRIVERS)
+ break;
+ }
+ }
+
+ data+=dm->length;
+ while((data-buf) < len && (*data || data[1]))
+ data++;
+ data+=2;
+ i++;
+ }
+ iounmap(buf);
+
+ return status;
+}
+
+inline static int dmi_checksum(u8 *buf)
+{
+ u8 sum=0;
+ int a;
+
+ for(a=0; a<15; a++)
+ sum+=buf[a];
+ return (sum==0);
+}
+
+static int dmi_decode(void)
+{
+ u8 buf[15];
+ u32 fp=0xF0000;
+
+#ifdef CONFIG_SIMNOW
+ return -1;
+#endif
+
+ while(fp < 0xFFFFF)
+ {
+ isa_memcpy_fromio(buf, fp, 15);
+ if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf))
+ {
+ u16 num=buf[13]<<8|buf[12];
+ u16 len=buf[7]<<8|buf[6];
+ u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8];
+
+ if(dmi_table(base, len, num) == 0)
+ return 0;
+ }
+ fp+=16;
+ }
+
+ return -1;
+}
+
+static int try_init_smbios(int intf_num, struct smi_info **new_info)
+{
+ struct smi_info *info;
+ dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
+ char *io_type;
+
+ if (intf_num >= dmi_data_entries)
+ return -ENODEV;
+
+ switch(ipmi_data->type) {
+ case 0x01: /* KCS */
+ si_type[intf_num] = "kcs";
+ break;
+ case 0x02: /* SMIC */
+ si_type[intf_num] = "smic";
+ break;
+ case 0x03: /* BT */
+ si_type[intf_num] = "bt";
+ break;
+ default:
+ return -EIO;
+ }
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ printk(KERN_ERR "ipmi_si: Could not allocate SI data (4)\n");
+ return -ENOMEM;
+ }
+ memset(info, 0, sizeof(*info));
+
+ if (ipmi_data->addr_space == 1) {
+ io_type = "memory";
+ info->io_setup = mem_setup;
+ addrs[intf_num] = ipmi_data->base_addr;
+ info->io.info = &(addrs[intf_num]);
+ } else if (ipmi_data->addr_space == 2) {
+ io_type = "I/O";
+ info->io_setup = port_setup;
+ ports[intf_num] = ipmi_data->base_addr;
+ info->io.info = &(ports[intf_num]);
+ } else {
+ kfree(info);
+ printk("ipmi_si: Unknown SMBIOS I/O Address type.\n");
+ return -EIO;
+ }
+
+ regspacings[intf_num] = ipmi_data->offset;
+ info->io.regspacing = regspacings[intf_num];
+ if (!info->io.regspacing)
+ info->io.regspacing = DEFAULT_REGSPACING;
+ info->io.regsize = DEFAULT_REGSPACING;
+ info->io.regshift = regshifts[intf_num];
+
+ info->slave_addr = ipmi_data->slave_addr;
+
+ irqs[intf_num] = ipmi_data->irq;
+
+ *new_info = info;
+
+ printk("ipmi_si: Found SMBIOS-specified state machine at %s"
+ " address 0x%lx, slave address 0x%x\n",
+ io_type, (unsigned long)ipmi_data->base_addr,
+ ipmi_data->slave_addr);
+ return 0;
+}
+#endif /* CONFIG_X86 */
+
+#ifdef CONFIG_PCI
+
+#define PCI_ERMC_CLASSCODE 0x0C0700
+#define PCI_HP_VENDOR_ID 0x103C
+#define PCI_MMC_DEVICE_ID 0x121A
+#define PCI_MMC_ADDR_CW 0x10
+
+/* Avoid more than one attempt to probe pci smic. */
+static int pci_smic_checked = 0;
+
+static int find_pci_smic(int intf_num, struct smi_info **new_info)
+{
+ struct smi_info *info;
+ int error;
+ struct pci_dev *pci_dev = NULL;
+ u16 base_addr;
+ int fe_rmc = 0;
+
+ if (pci_smic_checked)
+ return -ENODEV;
+
+ pci_smic_checked = 1;
+
+ if ((pci_dev = pci_get_device(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID,
+ NULL)))
+ ;
+ else if ((pci_dev = pci_get_class(PCI_ERMC_CLASSCODE, NULL)) &&
+ pci_dev->subsystem_vendor == PCI_HP_VENDOR_ID)
+ fe_rmc = 1;
+ else
+ return -ENODEV;
+
+ error = pci_read_config_word(pci_dev, PCI_MMC_ADDR_CW, &base_addr);
+ if (error)
+ {
+ pci_dev_put(pci_dev);
+ printk(KERN_ERR
+ "ipmi_si: pci_read_config_word() failed (%d).\n",
+ error);
+ return -ENODEV;
+ }
+
+ /* Bit 0: 1 specifies programmed I/O, 0 specifies memory mapped I/O */
+ if (!(base_addr & 0x0001))
+ {
+ pci_dev_put(pci_dev);
+ printk(KERN_ERR
+ "ipmi_si: memory mapped I/O not supported for PCI"
+ " smic.\n");
+ return -ENODEV;
+ }
+
+ base_addr &= 0xFFFE;
+ if (!fe_rmc)
+ /* Data register starts at base address + 1 in eRMC */
+ ++base_addr;
+
+ if (!is_new_interface(-1, IPMI_IO_ADDR_SPACE, base_addr)) {
+ pci_dev_put(pci_dev);
+ return -ENODEV;
+ }
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ pci_dev_put(pci_dev);
+ printk(KERN_ERR "ipmi_si: Could not allocate SI data (5)\n");
+ return -ENOMEM;
+ }
+ memset(info, 0, sizeof(*info));
+
+ info->io_setup = port_setup;
+ ports[intf_num] = base_addr;
+ info->io.info = &(ports[intf_num]);
+ info->io.regspacing = regspacings[intf_num];
+ if (!info->io.regspacing)
+ info->io.regspacing = DEFAULT_REGSPACING;
+ info->io.regsize = DEFAULT_REGSPACING;
+ info->io.regshift = regshifts[intf_num];
+
+ *new_info = info;
+
+ irqs[intf_num] = pci_dev->irq;
+ si_type[intf_num] = "smic";
+
+ printk("ipmi_si: Found PCI SMIC at I/O address 0x%lx\n",
+ (long unsigned int) base_addr);
+
+ pci_dev_put(pci_dev);
+ return 0;
+}
+#endif /* CONFIG_PCI */
+
+static int try_init_plug_and_play(int intf_num, struct smi_info **new_info)
+{
+#ifdef CONFIG_PCI
+ if (find_pci_smic(intf_num, new_info)==0)
+ return 0;
+#endif
+ /* Include other methods here. */
+
+ return -ENODEV;
+}
+
+
+static int try_get_dev_id(struct smi_info *smi_info)
+{
+ unsigned char msg[2];
+ unsigned char *resp;
+ unsigned long resp_len;
+ enum si_sm_result smi_result;
+ int rv = 0;
+
+ resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
+ if (!resp)
+ return -ENOMEM;
+
+ /* Do a Get Device ID command, since it comes back with some
+ useful info. */
+ msg[0] = IPMI_NETFN_APP_REQUEST << 2;
+ msg[1] = IPMI_GET_DEVICE_ID_CMD;
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
+
+ smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
+ for (;;)
+ {
+ if (smi_result == SI_SM_CALL_WITH_DELAY) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ smi_result = smi_info->handlers->event(
+ smi_info->si_sm, 100);
+ }
+ else if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
+ {
+ smi_result = smi_info->handlers->event(
+ smi_info->si_sm, 0);
+ }
+ else
+ break;
+ }
+ if (smi_result == SI_SM_HOSED) {
+ /* We couldn't get the state machine to run, so whatever's at
+ the port is probably not an IPMI SMI interface. */
+ rv = -ENODEV;
+ goto out;
+ }
+
+ /* Otherwise, we got some data. */
+ resp_len = smi_info->handlers->get_result(smi_info->si_sm,
+ resp, IPMI_MAX_MSG_LENGTH);
+ if (resp_len < 6) {
+ /* That's odd, it should be longer. */
+ rv = -EINVAL;
+ goto out;
+ }
+
+ if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) {
+ /* That's odd, it shouldn't be able to fail. */
+ rv = -EINVAL;
+ goto out;
+ }
+
+ /* Record info from the get device id, in case we need it. */
+ smi_info->ipmi_si_dev_rev = resp[4] & 0xf;
+ smi_info->ipmi_si_fw_rev_major = resp[5] & 0x7f;
+ smi_info->ipmi_si_fw_rev_minor = resp[6];
+ smi_info->ipmi_version_major = resp[7] & 0xf;
+ smi_info->ipmi_version_minor = resp[7] >> 4;
+
+ out:
+ kfree(resp);
+ return rv;
+}
+
+static int type_file_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ char *out = (char *) page;
+ struct smi_info *smi = data;
+
+ switch (smi->si_type) {
+ case SI_KCS:
+ return sprintf(out, "kcs\n");
+ case SI_SMIC:
+ return sprintf(out, "smic\n");
+ case SI_BT:
+ return sprintf(out, "bt\n");
+ default:
+ return 0;
+ }
+}
+
+static int stat_file_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ char *out = (char *) page;
+ struct smi_info *smi = data;
+
+ out += sprintf(out, "interrupts_enabled: %d\n",
+ smi->irq && !smi->interrupt_disabled);
+ out += sprintf(out, "short_timeouts: %ld\n",
+ smi->short_timeouts);
+ out += sprintf(out, "long_timeouts: %ld\n",
+ smi->long_timeouts);
+ out += sprintf(out, "timeout_restarts: %ld\n",
+ smi->timeout_restarts);
+ out += sprintf(out, "idles: %ld\n",
+ smi->idles);
+ out += sprintf(out, "interrupts: %ld\n",
+ smi->interrupts);
+ out += sprintf(out, "attentions: %ld\n",
+ smi->attentions);
+ out += sprintf(out, "flag_fetches: %ld\n",
+ smi->flag_fetches);
+ out += sprintf(out, "hosed_count: %ld\n",
+ smi->hosed_count);
+ out += sprintf(out, "complete_transactions: %ld\n",
+ smi->complete_transactions);
+ out += sprintf(out, "events: %ld\n",
+ smi->events);
+ out += sprintf(out, "watchdog_pretimeouts: %ld\n",
+ smi->watchdog_pretimeouts);
+ out += sprintf(out, "incoming_messages: %ld\n",
+ smi->incoming_messages);
+
+ return (out - ((char *) page));
+}
+
+/* Returns 0 if initialized, or negative on an error. */
+static int init_one_smi(int intf_num, struct smi_info **smi)
+{
+ int rv;
+ struct smi_info *new_smi;
+
+
+ rv = try_init_mem(intf_num, &new_smi);
+ if (rv)
+ rv = try_init_port(intf_num, &new_smi);
+#ifdef CONFIG_ACPI_INTERPRETER
+ if ((rv) && (si_trydefaults)) {
+ rv = try_init_acpi(intf_num, &new_smi);
+ }
+#endif
+#ifdef CONFIG_X86
+ if ((rv) && (si_trydefaults)) {
+ rv = try_init_smbios(intf_num, &new_smi);
+ }
+#endif
+ if ((rv) && (si_trydefaults)) {
+ rv = try_init_plug_and_play(intf_num, &new_smi);
+ }
+
+
+ if (rv)
+ return rv;
+
+ /* So we know not to free it unless we have allocated one. */
+ new_smi->intf = NULL;
+ new_smi->si_sm = NULL;
+ new_smi->handlers = NULL;
+
+ if (!new_smi->irq_setup) {
+ new_smi->irq = irqs[intf_num];
+ new_smi->irq_setup = std_irq_setup;
+ new_smi->irq_cleanup = std_irq_cleanup;
+ }
+
+ /* Default to KCS if no type is specified. */
+ if (si_type[intf_num] == NULL) {
+ if (si_trydefaults)
+ si_type[intf_num] = "kcs";
+ else {
+ rv = -EINVAL;
+ goto out_err;
+ }
+ }
+
+ /* Set up the state machine to use. */
+ if (strcmp(si_type[intf_num], "kcs") == 0) {
+ new_smi->handlers = &kcs_smi_handlers;
+ new_smi->si_type = SI_KCS;
+ } else if (strcmp(si_type[intf_num], "smic") == 0) {
+ new_smi->handlers = &smic_smi_handlers;
+ new_smi->si_type = SI_SMIC;
+ } else if (strcmp(si_type[intf_num], "bt") == 0) {
+ new_smi->handlers = &bt_smi_handlers;
+ new_smi->si_type = SI_BT;
+ } else {
+ /* No support for anything else yet. */
+ rv = -EIO;
+ goto out_err;
+ }
+
+ /* Allocate the state machine's data and initialize it. */
+ new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
+ if (!new_smi->si_sm) {
+ printk(" Could not allocate state machine memory\n");
+ rv = -ENOMEM;
+ goto out_err;
+ }
+ new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
+ &new_smi->io);
+
+ /* Now that we know the I/O size, we can set up the I/O. */
+ rv = new_smi->io_setup(new_smi);
+ if (rv) {
+ printk(" Could not set up I/O space\n");
+ goto out_err;
+ }
+
+ spin_lock_init(&(new_smi->si_lock));
+ spin_lock_init(&(new_smi->msg_lock));
+ spin_lock_init(&(new_smi->count_lock));
+
+ /* Do low-level detection first. */
+ if (new_smi->handlers->detect(new_smi->si_sm)) {
+ rv = -ENODEV;
+ goto out_err;
+ }
+
+ /* Attempt a get device id command. If it fails, we probably
+ don't have a SMI here. */
+ rv = try_get_dev_id(new_smi);
+ if (rv)
+ goto out_err;
+
+ /* Try to claim any interrupts. */
+ new_smi->irq_setup(new_smi);
+
+ INIT_LIST_HEAD(&(new_smi->xmit_msgs));
+ INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
+ new_smi->curr_msg = NULL;
+ atomic_set(&new_smi->req_events, 0);
+ new_smi->run_to_completion = 0;
+
+ new_smi->interrupt_disabled = 0;
+ new_smi->timer_stopped = 0;
+ new_smi->stop_operation = 0;
+
+ /* Start clearing the flags before we enable interrupts or the
+ timer to avoid racing with the timer. */
+ start_clear_flags(new_smi);
+ /* IRQ is defined to be set when non-zero. */
+ if (new_smi->irq)
+ new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
+
+ /* The ipmi_register_smi() code does some operations to
+ determine the channel information, so we must be ready to
+ handle operations before it is called. This means we have
+ to stop the timer if we get an error after this point. */
+ init_timer(&(new_smi->si_timer));
+ new_smi->si_timer.data = (long) new_smi;
+ new_smi->si_timer.function = smi_timeout;
+ new_smi->last_timeout_jiffies = jiffies;
+ new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
+ add_timer(&(new_smi->si_timer));
+
+ rv = ipmi_register_smi(&handlers,
+ new_smi,
+ new_smi->ipmi_version_major,
+ new_smi->ipmi_version_minor,
+ new_smi->slave_addr,
+ &(new_smi->intf));
+ if (rv) {
+ printk(KERN_ERR
+ "ipmi_si: Unable to register device: error %d\n",
+ rv);
+ goto out_err_stop_timer;
+ }
+
+ rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
+ type_file_read_proc, NULL,
+ new_smi, THIS_MODULE);
+ if (rv) {
+ printk(KERN_ERR
+ "ipmi_si: Unable to create proc entry: %d\n",
+ rv);
+ goto out_err_stop_timer;
+ }
+
+ rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
+ stat_file_read_proc, NULL,
+ new_smi, THIS_MODULE);
+ if (rv) {
+ printk(KERN_ERR
+ "ipmi_si: Unable to create proc entry: %d\n",
+ rv);
+ goto out_err_stop_timer;
+ }
+
+ *smi = new_smi;
+
+ printk(" IPMI %s interface initialized\n", si_type[intf_num]);
+
+ return 0;
+
+ out_err_stop_timer:
+ new_smi->stop_operation = 1;
+
+ /* Wait for the timer to stop. This avoids problems with race
+ conditions removing the timer here. */
+ while (!new_smi->timer_stopped) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ }
+
+ out_err:
+ if (new_smi->intf)
+ ipmi_unregister_smi(new_smi->intf);
+
+ new_smi->irq_cleanup(new_smi);
+
+ /* Wait until we know that we are out of any interrupt
+ handlers might have been running before we freed the
+ interrupt. */
+ synchronize_kernel();
+
+ if (new_smi->si_sm) {
+ if (new_smi->handlers)
+ new_smi->handlers->cleanup(new_smi->si_sm);
+ kfree(new_smi->si_sm);
+ }
+ new_smi->io_cleanup(new_smi);
+
+ return rv;
+}
+
+static __init int init_ipmi_si(void)
+{
+ int rv = 0;
+ int pos = 0;
+ int i;
+ char *str;
+
+ if (initialized)
+ return 0;
+ initialized = 1;
+
+ /* Parse out the si_type string into its components. */
+ str = si_type_str;
+ if (*str != '\0') {
+ for (i=0; (i<SI_MAX_PARMS) && (*str != '\0'); i++) {
+ si_type[i] = str;
+ str = strchr(str, ',');
+ if (str) {
+ *str = '\0';
+ str++;
+ } else {
+ break;
+ }
+ }
+ }
+
+ printk(KERN_INFO "IPMI System Interface driver version "
+ IPMI_SI_VERSION);
+ if (kcs_smi_handlers.version)
+ printk(", KCS version %s", kcs_smi_handlers.version);
+ if (smic_smi_handlers.version)
+ printk(", SMIC version %s", smic_smi_handlers.version);
+ if (bt_smi_handlers.version)
+ printk(", BT version %s", bt_smi_handlers.version);
+ printk("\n");
+
+#ifdef CONFIG_X86
+ dmi_decode();
+#endif
+
+ rv = init_one_smi(0, &(smi_infos[pos]));
+ if (rv && !ports[0] && si_trydefaults) {
+ /* If we are trying defaults and the initial port is
+ not set, then set it. */
+ si_type[0] = "kcs";
+ ports[0] = DEFAULT_KCS_IO_PORT;
+ rv = init_one_smi(0, &(smi_infos[pos]));
+ if (rv) {
+ /* No KCS - try SMIC */
+ si_type[0] = "smic";
+ ports[0] = DEFAULT_SMIC_IO_PORT;
+ rv = init_one_smi(0, &(smi_infos[pos]));
+ }
+ if (rv) {
+ /* No SMIC - try BT */
+ si_type[0] = "bt";
+ ports[0] = DEFAULT_BT_IO_PORT;
+ rv = init_one_smi(0, &(smi_infos[pos]));
+ }
+ }
+ if (rv == 0)
+ pos++;
+
+ for (i=1; i < SI_MAX_PARMS; i++) {
+ rv = init_one_smi(i, &(smi_infos[pos]));
+ if (rv == 0)
+ pos++;
+ }
+
+ if (smi_infos[0] == NULL) {
+ printk("ipmi_si: Unable to find any System Interface(s)\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+module_init(init_ipmi_si);
+
+static void __exit cleanup_one_si(struct smi_info *to_clean)
+{
+ int rv;
+ unsigned long flags;
+
+ if (! to_clean)
+ return;
+
+ /* Tell the timer and interrupt handlers that we are shutting
+ down. */
+ spin_lock_irqsave(&(to_clean->si_lock), flags);
+ spin_lock(&(to_clean->msg_lock));
+
+ to_clean->stop_operation = 1;
+
+ to_clean->irq_cleanup(to_clean);
+
+ spin_unlock(&(to_clean->msg_lock));
+ spin_unlock_irqrestore(&(to_clean->si_lock), flags);
+
+ /* Wait until we know that we are out of any interrupt
+ handlers might have been running before we freed the
+ interrupt. */
+ synchronize_kernel();
+
+ /* Wait for the timer to stop. This avoids problems with race
+ conditions removing the timer here. */
+ while (!to_clean->timer_stopped) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ }
+
+ /* Interrupts and timeouts are stopped, now make sure the
+ interface is in a clean state. */
+ while ((to_clean->curr_msg) || (to_clean->si_state != SI_NORMAL)) {
+ poll(to_clean);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ }
+
+ rv = ipmi_unregister_smi(to_clean->intf);
+ if (rv) {
+ printk(KERN_ERR
+ "ipmi_si: Unable to unregister device: errno=%d\n",
+ rv);
+ }
+
+ to_clean->handlers->cleanup(to_clean->si_sm);
+
+ kfree(to_clean->si_sm);
+
+ to_clean->io_cleanup(to_clean);
+}
+
+static __exit void cleanup_ipmi_si(void)
+{
+ int i;
+
+ if (!initialized)
+ return;
+
+ for (i=0; i<SI_MAX_DRIVERS; i++) {
+ cleanup_one_si(smi_infos[i]);
+ }
+}
+module_exit(cleanup_ipmi_si);
+
+MODULE_LICENSE("GPL");