[PATCH] IPMI (Intelligent Platform Management Interface) driver

CREDITS

@@ -2185,9 +2185,15 @@ S: Germany
 
 N: Corey Minyard
 E: minyard@wf-rch.cirr.com
+E: minyard@mvista.com
+W: http://home.attbi.com/~minyard
 D: Sony CDU31A CDROM Driver
-S: 1805 Marquette
-S: Richardson, Texas 75081
+D: IPMI driver
+D: Various networking fixes long ago
+D: Original ppc_md work
+D: Shared zlib
+S: 7406 Wheat Field Rd
+S: Garland, Texas 75044
 S: USA
 
 N: Patrick Mochel

drivers/char/Kconfig

@@ -636,6 +636,8 @@ comment "from the tpqic02-support package.  It is available at"
 comment "metalab.unc.edu or ftp://titus.cfw.com/pub/Linux/util/"
 	depends on QIC02_TAPE && QIC02_DYNCONF
 
+source "drivers/char/ipmi/Kconfig"
+
 source "drivers/char/watchdog/Kconfig"
 
 config DS1620

drivers/char/Makefile

@@ -82,6 +82,7 @@ obj-$(CONFIG_MWAVE) += mwave/
 obj-$(CONFIG_AGP) += agp/
 obj-$(CONFIG_DRM) += drm/
 obj-$(CONFIG_PCMCIA) += pcmcia/
+obj-$(CONFIG_IPMI_HANDLER) += ipmi/
 
 
 # Files generated that shall be removed upon make clean

drivers/char/ipmi/Kconfig

+#
+# IPMI device configuration
+#
+
+menu "IPMI"
+config IPMI_HANDLER
+       tristate 'IPMI top-level message handler'
+       help
+         This enables the central IPMI message handler, required for IPMI
+	 to work.  Note that you must have this enabled to do any other IPMI
+	 things.  See IPMI.txt for more details.
+
+config IPMI_PANIC_EVENT
+       bool 'Generate a panic event to all BMCs on a panic'
+       depends on IPMI_HANDLER
+       help
+         When a panic occurs, this will cause the IPMI message handler to
+	 generate an IPMI event describing the panic to each interface
+	 registered with the message handler.
+
+config IPMI_DEVICE_INTERFACE
+       tristate 'Device interface for IPMI'
+       depends on IPMI_HANDLER
+       help
+         This provides an IOCTL interface to the IPMI message handler so
+	 userland processes may use IPMI.  It supports poll() and select().
+
+config IPMI_KCS
+       tristate 'IPMI KCS handler'
+       depends on IPMI_HANDLER
+       help
+         Provides a driver for a KCS-style interface to a BMC.
+
+config IPMI_WATCHDOG
+       tristate 'IPMI Watchdog Timer'
+       depends on IPMI_HANDLER
+       help
+         This enables the IPMI watchdog timer.
+
+endmenu

drivers/char/ipmi/Makefile

+#
+# Makefile for the ipmi drivers.
+#
+
+export-objs	:= ipmi_msghandler.o ipmi_watchdog.o
+
+ipmi_kcs_drv-objs := ipmi_kcs_sm.o ipmi_kcs_intf.o
+
+obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
+obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o
+obj-$(CONFIG_IPMI_KCS) += ipmi_kcs_drv.o
+obj-$(CONFIG_IPMI_WATCHDOG) += ipmi_watchdog.o
+
+ipmi_kcs_drv.o:	$(ipmi_kcs_drv-objs)
+	$(LD) -r -o $@ $(ipmi_kcs_drv-objs) 

drivers/char/ipmi/ipmi_kcs_sm.h

+/*
+ * ipmi_kcs_sm.h
+ *
+ * State machine for handling IPMI KCS interfaces.
+ *
+ * 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.
+ */
+
+struct kcs_data;
+
+void init_kcs_data(struct kcs_data *kcs,
+		   unsigned int    port,
+		   unsigned char   *addr);
+
+/* Start a new transaction in the state machine.  This will return -2
+   if the state machine is not idle, -1 if the size is invalid (to
+   large or too small), or 0 if the transaction is successfully
+   completed. */
+int start_kcs_transaction(struct kcs_data *kcs, char *data, unsigned int size);
+
+/* Return the results after the transaction.  This will return -1 if
+   the buffer is too small, zero if no transaction is present, or the
+   actual length of the result data. */
+int kcs_get_result(struct kcs_data *kcs, unsigned char *data, int length);
+
+enum kcs_result
+{
+	KCS_CALL_WITHOUT_DELAY, /* Call the driver again immediately */
+	KCS_CALL_WITH_DELAY,	/* Delay some before calling again. */
+	KCS_TRANSACTION_COMPLETE, /* A transaction is finished. */
+	KCS_SM_IDLE,		/* The SM is in idle state. */
+	KCS_SM_HOSED,		/* The hardware violated the state machine. */
+	KCS_ATTN		/* The hardware is asserting attn and the
+				   state machine is idle. */
+};
+
+/* Call this periodically (for a polled interface) or upon receiving
+   an interrupt (for a interrupt-driven interface).  If interrupt
+   driven, you should probably poll this periodically when not in idle
+   state.  This should be called with the time that passed since the
+   last call, if it is significant.  Time is in microseconds. */
+enum kcs_result kcs_event(struct kcs_data *kcs, long time);
+
+/* Return the size of the KCS structure in bytes. */
+int kcs_size(void);

include/linux/ipmi_msgdefs.h

+/*
+ * ipmi_smi.h
+ *
+ * MontaVista IPMI system management interface
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_IPMI_MSGDEFS_H
+#define __LINUX_IPMI_MSGDEFS_H
+
+/* Various definitions for IPMI messages used by almost everything in
+   the IPMI stack. */
+
+#define IPMI_NETFN_APP_REQUEST	0x06
+#define IPMI_NETFN_APP_RESPONSE	0x07
+
+#define IPMI_BMC_SLAVE_ADDR	0x20
+
+#define IPMI_GET_DEVICE_ID_CMD		0x01
+
+#define IPMI_CLEAR_MSG_FLAGS_CMD	0x30
+#define IPMI_GET_MSG_FLAGS_CMD		0x31
+#define IPMI_SEND_MSG_CMD		0x34
+#define IPMI_GET_MSG_CMD		0x33
+
+#define IPMI_SET_BMC_GLOBAL_ENABLES_CMD	0x2e
+#define IPMI_GET_BMC_GLOBAL_ENABLES_CMD	0x2f
+#define IPMI_READ_EVENT_MSG_BUFFER_CMD	0x35
+
+#define IPMI_MAX_MSG_LENGTH	80
+
+#endif /* __LINUX_IPMI_MSGDEFS_H */

include/linux/ipmi_smi.h

+/*
+ * ipmi_smi.h
+ *
+ * MontaVista IPMI system management interface
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_IPMI_SMI_H
+#define __LINUX_IPMI_SMI_H
+
+#include <linux/ipmi_msgdefs.h>
+
+/* This files describes the interface for IPMI system management interface
+   drivers to bind into the IPMI message handler. */
+
+/* Structure for the low-level drivers. */
+typedef struct ipmi_smi *ipmi_smi_t;
+
+/*
+ * Messages to/from the lower layer.  The smi interface will take one
+ * of these to send. After the send has occurred and a response has
+ * been received, it will report this same data structure back up to
+ * the upper layer.  If an error occurs, it should fill in the
+ * response with an error code in the completion code location. When
+ * asyncronous data is received, one of these is allocated, the
+ * data_size is set to zero and the response holds the data from the
+ * get message or get event command that the interface initiated.
+ * Note that it is the interfaces responsibility to detect
+ * asynchronous data and messages and request them from the
+ * interface.
+ */
+struct ipmi_smi_msg
+{
+	struct list_head link;
+
+	long    msgid;
+	void    *user_data;
+
+	/* If 0, add to the end of the queue.  If 1, add to the beginning. */
+	int     prio;
+
+	int           data_size;
+	unsigned char data[IPMI_MAX_MSG_LENGTH];
+
+	int           rsp_size;
+	unsigned char rsp[IPMI_MAX_MSG_LENGTH];
+
+	/* Will be called when the system is done with the message
+           (presumably to free it). */
+	void (*done)(struct ipmi_smi_msg *msg);
+};
+
+struct ipmi_smi_handlers
+{
+	/* Called to enqueue an SMI message to be sent.  This
+	   operation is not allowed to fail.  If an error occurs, it
+	   should report back the error in a received message.  It may
+	   do this in the current call context, since no write locks
+	   are held when this is run.  If the priority is > 0, the
+	   message will go into a high-priority queue and be sent
+	   first.  Otherwise, it goes into a normal-priority queue. */
+	void (*sender)(void                *send_info,
+		       struct ipmi_smi_msg *msg,
+		       int                 priority);
+
+	/* Called by the upper layer to request that we try to get
+	   events from the BMC we are attached to. */
+	void (*request_events)(void *send_info);
+
+	/* Called when someone is using the interface, so the module can
+	   adjust it's use count.  Return zero if successful, or an
+	   errno if not. */
+	int (*new_user)(void *send_info);
+
+	/* Called when someone is no longer using the interface, so the
+	   module can adjust it's use count. */
+	void (*user_left)(void *send_info);
+
+	/* Called when the interface should go into "run to
+	   completion" mode.  If this call sets the value to true, the
+	   interface should make sure that all messages are flushed
+	   out and that none are pending, and any new requests are run
+	   to completion immediately. */
+	void (*set_run_to_completion)(void *send_info, int run_to_completion);
+};
+
+/* Add a low-level interface to the IPMI driver. */
+int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
+		      void                     *send_info,
+		      unsigned char            version_major,
+		      unsigned char            version_minor,
+		      ipmi_smi_t               *intf);
+
+/*
+ * Remove a low-level interface from the IPMI driver.  This will
+ * return an error if the interface is still in use by a user.
+ */
+int ipmi_unregister_smi(ipmi_smi_t intf);
+
+/*
+ * The lower layer reports received messages through this interface.
+ * The data_size should be zero if this is an asyncronous message.  If
+ * the lower layer gets an error sending a message, it should format
+ * an error response in the message response.
+ */
+void ipmi_smi_msg_received(ipmi_smi_t          intf,
+			   struct ipmi_smi_msg *msg);
+
+/* The lower layer received a watchdog pre-timeout on interface. */
+void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf);
+
+struct ipmi_smi_msg *ipmi_alloc_smi_msg(void);
+static inline void ipmi_free_smi_msg(struct ipmi_smi_msg *msg)
+{
+	msg->done(msg);
+}
+
+#endif /* __LINUX_IPMI_SMI_H */

kernel/ksyms.c

@@ -66,6 +66,8 @@
 
 extern struct timezone sys_tz;
 
+extern int panic_timeout;
+
 #ifdef CONFIG_MODVERSIONS
 const struct module_symbol __export_Using_Versions
 __attribute__((section("__ksymtab"))) = {
@@ -502,6 +504,8 @@ EXPORT_SYMBOL(loops_per_jiffy);
 
 /* misc */
 EXPORT_SYMBOL(panic);
+EXPORT_SYMBOL(panic_notifier_list);
+EXPORT_SYMBOL(panic_timeout);
 EXPORT_SYMBOL(sprintf);
 EXPORT_SYMBOL(snprintf);
 EXPORT_SYMBOL(sscanf);