Linux-2.6.12-rc2v2.6.12-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!

21 files changed, 2962 insertions, 0 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
new file mode 100644
index 00000000000..4cecdafeb87
--- /dev/null
+++ b/drivers/misc/Kconfig
@@ -0,0 +1,33 @@
+#
+# Misc strange devices
+#
+
+menu "Misc devices"
+
+config IBM_ASM
+	tristate "Device driver for IBM RSA service processor"
+	depends on X86 && EXPERIMENTAL
+	default n
+	---help---
+	  This option enables device driver support for in-band access to the
+	  IBM RSA (Condor) service processor in eServer xSeries systems.
+	  The ibmasm device driver allows user space application to access
+	  ASM (Advanced Systems Management) functions on the service
+	  processor. The driver is meant to be used in conjunction with
+	  a user space API.
+	  The ibmasm driver also enables the OS to use the UART on the
+	  service processor board as a regular serial port. To make use of
+	  this feature serial driver support (CONFIG_SERIAL_8250) must be
+	  enabled.
+	  
+	  WARNING: This software may not be supported or function
+	  correctly on your IBM server. Please consult the IBM ServerProven
+	  website <http://www.pc.ibm/ww/eserver/xseries/serverproven> for
+	  information on the specific driver level and support statement
+	  for your IBM server.
+
+
+	  If unsure, say N.
+
+endmenu
+
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
new file mode 100644
index 00000000000..19c2b85249c
--- /dev/null
+++ b/drivers/misc/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for misc devices that really don't fit anywhere else.
+#
+obj- := misc.o	# Dummy rule to force built-in.o to be made
+
+obj-$(CONFIG_IBM_ASM)	+= ibmasm/
+obj-$(CONFIG_HDPU_FEATURES)	+= hdpuftrs/
diff --git a/drivers/misc/hdpuftrs/Makefile b/drivers/misc/hdpuftrs/Makefile
new file mode 100644
index 00000000000..ac74ae67923
--- /dev/null
+++ b/drivers/misc/hdpuftrs/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_HDPU_FEATURES) := hdpu_cpustate.o hdpu_nexus.o
diff --git a/drivers/misc/hdpuftrs/hdpu_cpustate.c b/drivers/misc/hdpuftrs/hdpu_cpustate.c
new file mode 100644
index 00000000000..7501fab349e
--- /dev/null
+++ b/drivers/misc/hdpuftrs/hdpu_cpustate.c
@@ -0,0 +1,234 @@
+/*
+ *	Sky CPU State Driver
+ *
+ *	Copyright (C) 2002 Brian Waite
+ *
+ *	This driver allows use of the CPU state bits
+ *	It exports the /dev/sky_cpustate and also
+ *	/proc/sky_cpustate pseudo-file for status information.
+ *
+ *	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.
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/miscdevice.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/device.h>
+#include <asm/uaccess.h>
+#include <linux/hdpu_features.h>
+
+#define SKY_CPUSTATE_VERSION		"1.1"
+
+static int hdpu_cpustate_probe(struct device *ddev);
+static int hdpu_cpustate_remove(struct device *ddev);
+
+struct cpustate_t cpustate;
+
+static int cpustate_get_ref(int excl)
+{
+
+	int retval = -EBUSY;
+
+	spin_lock(&cpustate.lock);
+
+	if (cpustate.excl)
+		goto out_busy;
+
+	if (excl) {
+		if (cpustate.open_count)
+			goto out_busy;
+		cpustate.excl = 1;
+	}
+
+	cpustate.open_count++;
+	retval = 0;
+
+      out_busy:
+	spin_unlock(&cpustate.lock);
+	return retval;
+}
+
+static int cpustate_free_ref(void)
+{
+
+	spin_lock(&cpustate.lock);
+
+	cpustate.excl = 0;
+	cpustate.open_count--;
+
+	spin_unlock(&cpustate.lock);
+	return 0;
+}
+
+unsigned char cpustate_get_state(void)
+{
+
+	return cpustate.cached_val;
+}
+
+void cpustate_set_state(unsigned char new_state)
+{
+	unsigned int state = (new_state << 21);
+
+#ifdef DEBUG_CPUSTATE
+	printk("CPUSTATE -> 0x%x\n", new_state);
+#endif
+	spin_lock(&cpustate.lock);
+	cpustate.cached_val = new_state;
+	writel((0xff << 21), cpustate.clr_addr);
+	writel(state, cpustate.set_addr);
+	spin_unlock(&cpustate.lock);
+}
+
+/*
+ *	Now all the various file operations that we export.
+ */
+
+static ssize_t cpustate_read(struct file *file, char *buf,
+			     size_t count, loff_t * ppos)
+{
+	unsigned char data;
+
+	if (count < 0)
+		return -EFAULT;
+	if (count == 0)
+		return 0;
+
+	data = cpustate_get_state();
+	if (copy_to_user(buf, &data, sizeof(unsigned char)))
+		return -EFAULT;
+	return sizeof(unsigned char);
+}
+
+static ssize_t cpustate_write(struct file *file, const char *buf,
+			      size_t count, loff_t * ppos)
+{
+	unsigned char data;
+
+	if (count < 0)
+		return -EFAULT;
+
+	if (count == 0)
+		return 0;
+
+	if (copy_from_user((unsigned char *)&data, buf, sizeof(unsigned char)))
+		return -EFAULT;
+
+	cpustate_set_state(data);
+	return sizeof(unsigned char);
+}
+
+static int cpustate_open(struct inode *inode, struct file *file)
+{
+	return cpustate_get_ref((file->f_flags & O_EXCL));
+}
+
+static int cpustate_release(struct inode *inode, struct file *file)
+{
+	return cpustate_free_ref();
+}
+
+/*
+ *	Info exported via "/proc/sky_cpustate".
+ */
+static int cpustate_read_proc(char *page, char **start, off_t off,
+			      int count, int *eof, void *data)
+{
+	char *p = page;
+	int len = 0;
+
+	p += sprintf(p, "CPU State: %04x\n", cpustate_get_state());
+	len = p - page;
+
+	if (len <= off + count)
+		*eof = 1;
+	*start = page + off;
+	len -= off;
+	if (len > count)
+		len = count;
+	if (len < 0)
+		len = 0;
+	return len;
+}
+
+static struct device_driver hdpu_cpustate_driver = {
+	.name = HDPU_CPUSTATE_NAME,
+	.bus = &platform_bus_type,
+	.probe = hdpu_cpustate_probe,
+	.remove = hdpu_cpustate_remove,
+};
+
+/*
+ *	The various file operations we support.
+ */
+static struct file_operations cpustate_fops = {
+      owner:THIS_MODULE,
+      open:cpustate_open,
+      release:cpustate_release,
+      read:cpustate_read,
+      write:cpustate_write,
+      fasync:NULL,
+      poll:NULL,
+      ioctl:NULL,
+      llseek:no_llseek,
+
+};
+
+static struct miscdevice cpustate_dev = {
+	MISC_DYNAMIC_MINOR,
+	"sky_cpustate",
+	&cpustate_fops
+};
+
+static int hdpu_cpustate_probe(struct device *ddev)
+{
+	struct platform_device *pdev = to_platform_device(ddev);
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	cpustate.set_addr = (unsigned long *)res->start;
+	cpustate.clr_addr = (unsigned long *)res->end - 1;
+
+	misc_register(&cpustate_dev);
+	create_proc_read_entry("sky_cpustate", 0, 0, cpustate_read_proc, NULL);
+
+	printk(KERN_INFO "Sky CPU State Driver v" SKY_CPUSTATE_VERSION "\n");
+	return 0;
+}
+static int hdpu_cpustate_remove(struct device *ddev)
+{
+
+	cpustate.set_addr = 0;
+	cpustate.clr_addr = 0;
+
+	remove_proc_entry("sky_cpustate", NULL);
+	misc_deregister(&cpustate_dev);
+	return 0;
+
+}
+
+static int __init cpustate_init(void)
+{
+	int rc;
+	rc = driver_register(&hdpu_cpustate_driver);
+	return rc;
+}
+
+static void __exit cpustate_exit(void)
+{
+	driver_unregister(&hdpu_cpustate_driver);
+}
+
+module_init(cpustate_init);
+module_exit(cpustate_exit);
+
+MODULE_AUTHOR("Brian Waite");
+MODULE_LICENSE("GPL");
diff --git a/drivers/misc/hdpuftrs/hdpu_nexus.c b/drivers/misc/hdpuftrs/hdpu_nexus.c
new file mode 100644
index 00000000000..c203b27269e
--- /dev/null
+++ b/drivers/misc/hdpuftrs/hdpu_nexus.c
@@ -0,0 +1,111 @@
+/*
+ *	Sky Nexus Register Driver
+ *
+ *	Copyright (C) 2002 Brian Waite
+ *
+ *	This driver allows reading the Nexus register
+ *	It exports the /proc/sky_chassis_id and also
+ *	/proc/sky_slot_id pseudo-file for status information.
+ *
+ *	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.
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/hdpu_features.h>
+#include <linux/pci.h>
+
+#include <linux/device.h>
+
+static int hdpu_nexus_probe(struct device *ddev);
+static int hdpu_nexus_remove(struct device *ddev);
+
+static struct proc_dir_entry *hdpu_slot_id;
+static struct proc_dir_entry *hdpu_chassis_id;
+static int slot_id = -1;
+static int chassis_id = -1;
+
+static struct device_driver hdpu_nexus_driver = {
+	.name = HDPU_NEXUS_NAME,
+	.bus = &platform_bus_type,
+	.probe = hdpu_nexus_probe,
+	.remove = hdpu_nexus_remove,
+};
+
+int hdpu_slot_id_read(char *buffer, char **buffer_location, off_t offset,
+		      int buffer_length, int *zero, void *ptr)
+{
+
+	if (offset > 0)
+		return 0;
+	return sprintf(buffer, "%d\n", slot_id);
+}
+
+int hdpu_chassis_id_read(char *buffer, char **buffer_location, off_t offset,
+			 int buffer_length, int *zero, void *ptr)
+{
+
+	if (offset > 0)
+		return 0;
+	return sprintf(buffer, "%d\n", chassis_id);
+}
+
+static int hdpu_nexus_probe(struct device *ddev)
+{
+	struct platform_device *pdev = to_platform_device(ddev);
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	int *nexus_id_addr;
+	nexus_id_addr =
+	    ioremap(res->start, (unsigned long)(res->end - res->start));
+	if (nexus_id_addr) {
+		slot_id = (*nexus_id_addr >> 8) & 0x1f;
+		chassis_id = *nexus_id_addr & 0xff;
+		iounmap(nexus_id_addr);
+	} else
+		printk("Could not map slot id\n");
+	hdpu_slot_id = create_proc_entry("sky_slot_id", 0666, &proc_root);
+	hdpu_slot_id->read_proc = hdpu_slot_id_read;
+	hdpu_slot_id->nlink = 1;
+
+	hdpu_chassis_id = create_proc_entry("sky_chassis_id", 0666, &proc_root);
+	hdpu_chassis_id->read_proc = hdpu_chassis_id_read;
+	hdpu_chassis_id->nlink = 1;
+	return 0;
+}
+
+static int hdpu_nexus_remove(struct device *ddev)
+{
+	slot_id = -1;
+	chassis_id = -1;
+	remove_proc_entry("sky_slot_id", &proc_root);
+	remove_proc_entry("sky_chassis_id", &proc_root);
+	hdpu_slot_id = 0;
+	hdpu_chassis_id = 0;
+	return 0;
+}
+
+static int __init nexus_init(void)
+{
+	int rc;
+	rc = driver_register(&hdpu_nexus_driver);
+	return rc;
+}
+
+static void __exit nexus_exit(void)
+{
+	driver_unregister(&hdpu_nexus_driver);
+}
+
+module_init(nexus_init);
+module_exit(nexus_exit);
+
+MODULE_AUTHOR("Brian Waite");
+MODULE_LICENSE("GPL");
diff --git a/drivers/misc/ibmasm/Makefile b/drivers/misc/ibmasm/Makefile
new file mode 100644
index 00000000000..9e63ade5ffd
--- /dev/null
+++ b/drivers/misc/ibmasm/Makefile
@@ -0,0 +1,15 @@
+
+obj-$(CONFIG_IBM_ASM) := ibmasm.o
+
+ibmasm-y :=	module.o      \
+		ibmasmfs.o    \
+		event.o       \
+		command.o     \
+		remote.o      \
+		heartbeat.o   \
+		r_heartbeat.o \
+		dot_command.o \
+		lowlevel.o
+
+ibmasm-$(CONFIG_SERIAL_8250) += uart.o
+
diff --git a/drivers/misc/ibmasm/command.c b/drivers/misc/ibmasm/command.c
new file mode 100644
index 00000000000..245b0058381
--- /dev/null
+++ b/drivers/misc/ibmasm/command.c
@@ -0,0 +1,175 @@
+
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com> 
+ *
+ */
+
+#include "ibmasm.h"
+
+static void exec_next_command(struct service_processor *sp);
+static void free_command(struct kobject *kobj);
+
+static struct kobj_type ibmasm_cmd_kobj_type = {
+	.release = free_command,
+};
+
+
+struct command *ibmasm_new_command(size_t buffer_size)
+{
+	struct command *cmd;
+
+	if (buffer_size > IBMASM_CMD_MAX_BUFFER_SIZE)
+		return NULL;
+
+	cmd = kmalloc(sizeof(struct command), GFP_KERNEL);
+	if (cmd == NULL)
+		return NULL;
+
+	memset(cmd, 0, sizeof(*cmd));
+
+	cmd->buffer = kmalloc(buffer_size, GFP_KERNEL);
+	if (cmd->buffer == NULL) {
+		kfree(cmd);
+		return NULL;
+	}
+	memset(cmd->buffer, 0, buffer_size);
+	cmd->buffer_size = buffer_size;
+
+	kobject_init(&cmd->kobj);
+	cmd->kobj.ktype = &ibmasm_cmd_kobj_type;
+
+	cmd->status = IBMASM_CMD_PENDING;
+	init_waitqueue_head(&cmd->wait);
+	INIT_LIST_HEAD(&cmd->queue_node);
+
+	return cmd;
+}
+
+static void free_command(struct kobject *kobj)
+{
+	struct command *cmd = to_command(kobj);
+ 
+	list_del(&cmd->queue_node);
+	kfree(cmd->buffer);
+	kfree(cmd);
+}
+
+static void enqueue_command(struct service_processor *sp, struct command *cmd)
+{
+	list_add_tail(&cmd->queue_node, &sp->command_queue);
+}
+
+static struct command *dequeue_command(struct service_processor *sp)
+{
+	struct command *cmd;
+	struct list_head *next;
+
+	if (list_empty(&sp->command_queue))
+		return NULL;
+
+	next = sp->command_queue.next;
+	list_del_init(next);
+	cmd = list_entry(next, struct command, queue_node);
+
+	return cmd;
+}
+
+static inline void do_exec_command(struct service_processor *sp)
+{
+	if (ibmasm_send_i2o_message(sp)) {
+		sp->current_command->status = IBMASM_CMD_FAILED;
+		exec_next_command(sp);
+	}
+}
+	
+/**
+ * exec_command
+ * send a command to a service processor
+ * Commands are executed sequentially. One command (sp->current_command)
+ * is sent to the service processor. Once the interrupt handler gets a
+ * message of type command_response, the message is copied into
+ * the current commands buffer, 
+ */
+void ibmasm_exec_command(struct service_processor *sp, struct command *cmd)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sp->lock, flags);
+
+	if (!sp->current_command) {
+		command_get(cmd);
+		sp->current_command = cmd;
+		spin_unlock_irqrestore(&sp->lock, flags);
+
+		do_exec_command(sp);
+	} else {
+		enqueue_command(sp, cmd);
+		spin_unlock_irqrestore(&sp->lock, flags);
+	}
+}
+
+static void exec_next_command(struct service_processor *sp)
+{
+	unsigned long flags;
+
+	wake_up(&sp->current_command->wait);
+	command_put(sp->current_command);
+
+	spin_lock_irqsave(&sp->lock, flags);
+	sp->current_command = dequeue_command(sp);
+	if (sp->current_command) {
+		command_get(sp->current_command);
+		spin_unlock_irqrestore(&sp->lock, flags);
+		do_exec_command(sp);
+	} else {
+		spin_unlock_irqrestore(&sp->lock, flags);
+	}
+}
+
+/** 
+ * Sleep until a command has failed or a response has been received
+ * and the command status been updated by the interrupt handler.
+ * (see receive_response).
+ */
+void ibmasm_wait_for_response(struct command *cmd, int timeout)
+{
+	wait_event_interruptible_timeout(cmd->wait,
+				cmd->status == IBMASM_CMD_COMPLETE ||
+				cmd->status == IBMASM_CMD_FAILED,
+				timeout * HZ);
+}
+
+/**
+ * receive_command_response
+ * called by the interrupt handler when a dot command of type command_response
+ * was received.
+ */
+void ibmasm_receive_command_response(struct service_processor *sp, void *response, size_t size)
+{
+	struct command *cmd = sp->current_command;
+
+	if (!sp->current_command) 
+		return; 
+
+	memcpy(cmd->buffer, response, min(size, cmd->buffer_size));
+	cmd->status = IBMASM_CMD_COMPLETE;
+	exec_next_command(sp);
+}
diff --git a/drivers/misc/ibmasm/dot_command.c b/drivers/misc/ibmasm/dot_command.c
new file mode 100644
index 00000000000..478a8d898fc
--- /dev/null
+++ b/drivers/misc/ibmasm/dot_command.c
@@ -0,0 +1,146 @@
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com> 
+ *
+ */
+
+#include "ibmasm.h"
+#include "dot_command.h"
+
+/**
+ * Dispatch an incoming message to the specific handler for the message.
+ * Called from interrupt context.
+ */
+void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size)
+{
+	u32 size;
+	struct dot_command_header *header = (struct dot_command_header *)message;
+
+	size = get_dot_command_size(message);
+	if (size > message_size)
+		size = message_size;
+
+	switch (header->type) {
+	case sp_event: 
+		ibmasm_receive_event(sp, message, size);
+		break;
+	case sp_command_response:
+		ibmasm_receive_command_response(sp, message, size); 
+		break;
+	case sp_heartbeat:
+		ibmasm_receive_heartbeat(sp, message, size);
+		break;
+	default:
+		dev_err(sp->dev, "Received unknown message from service processor\n");
+	}
+}
+
+
+#define INIT_BUFFER_SIZE 32
+
+
+/**
+ * send the 4.3.5.10 dot command (driver VPD) to the service processor
+ */
+int ibmasm_send_driver_vpd(struct service_processor *sp)
+{
+	struct command *command;
+	struct dot_command_header *header;
+	u8 *vpd_command;
+	u8 *vpd_data;
+	int result = 0;
+
+	command = ibmasm_new_command(INIT_BUFFER_SIZE);
+	if (command == NULL)
+		return -ENOMEM;
+
+	header = (struct dot_command_header *)command->buffer;
+	header->type                = sp_write;
+	header->command_size        = 4;
+	header->data_size           = 16;
+	header->status              = 0;
+	header->reserved            = 0;
+
+	vpd_command = command->buffer + sizeof(struct dot_command_header);
+	vpd_command[0] = 0x4;
+	vpd_command[1] = 0x3;
+	vpd_command[2] = 0x5;
+	vpd_command[3] = 0xa;
+
+	vpd_data = vpd_command + header->command_size;
+	vpd_data[0] = 0;
+	strcat(vpd_data, IBMASM_DRIVER_VPD);
+	vpd_data[10] = 0;
+	vpd_data[15] = 0;
+	
+	ibmasm_exec_command(sp, command);
+	ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL);
+
+	if (command->status != IBMASM_CMD_COMPLETE)
+		result = -ENODEV;
+
+	command_put(command);
+
+	return result;
+}
+
+struct os_state_command {
+	struct dot_command_header	header;
+	unsigned char			command[3];
+	unsigned char			data;
+};
+
+/**
+ * send the 4.3.6 dot command (os state) to the service processor
+ * During driver init this function is called with os state "up".
+ * This causes the service processor to start sending heartbeats the
+ * driver.
+ * During driver exit the function is called with os state "down", 
+ * causing the service processor to stop the heartbeats.
+ */
+int ibmasm_send_os_state(struct service_processor *sp, int os_state)
+{
+	struct command *cmd;
+	struct os_state_command *os_state_cmd;
+	int result = 0;
+
+	cmd = ibmasm_new_command(sizeof(struct os_state_command));
+	if (cmd == NULL)
+		return -ENOMEM;
+
+	os_state_cmd = (struct os_state_command *)cmd->buffer;
+	os_state_cmd->header.type		= sp_write;
+	os_state_cmd->header.command_size	= 3;
+	os_state_cmd->header.data_size		= 1;
+	os_state_cmd->header.status		= 0;
+	os_state_cmd->command[0]		= 4;
+	os_state_cmd->command[1]		= 3;
+	os_state_cmd->command[2]		= 6;
+	os_state_cmd->data			= os_state;
+
+	ibmasm_exec_command(sp, cmd);
+	ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL);
+
+	if (cmd->status != IBMASM_CMD_COMPLETE)
+		result = -ENODEV;
+
+	command_put(cmd);
+	return result;
+}
diff --git a/drivers/misc/ibmasm/dot_command.h b/drivers/misc/ibmasm/dot_command.h
new file mode 100644
index 00000000000..2d21c2741b6
--- /dev/null
+++ b/drivers/misc/ibmasm/dot_command.h
@@ -0,0 +1,78 @@
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com> 
+ *
+ */
+
+#ifndef __DOT_COMMAND_H__
+#define __DOT_COMMAND_H__
+
+/*
+ * dot commands are the protocol used to communicate with the service
+ * processor.
+ * They consist of header, a command of variable length and data of
+ * variable length.
+ */
+
+/* dot command types */
+#define sp_write		0
+#define sp_write_next		1
+#define sp_read			2
+#define sp_read_next		3
+#define sp_command_response	4
+#define sp_event		5
+#define sp_heartbeat		6
+
+#pragma pack(1)
+struct dot_command_header {
+	u8	type;
+	u8	command_size;
+	u16	data_size;
+	u8	status;
+	u8	reserved;
+};
+#pragma pack()
+
+static inline size_t get_dot_command_size(void *buffer)
+{
+	struct dot_command_header *cmd = (struct dot_command_header *)buffer;
+	return sizeof(struct dot_command_header) + cmd->command_size + cmd->data_size;
+}
+
+static inline unsigned int get_dot_command_timeout(void *buffer)
+{
+	struct dot_command_header *header = (struct dot_command_header *)buffer;
+	unsigned char *cmd = buffer + sizeof(struct dot_command_header);
+
+	/* dot commands 6.3.1, 7.1 and 8.x need a longer timeout */
+
+	if (header->command_size == 3) {
+		if ((cmd[0] == 6) && (cmd[1] == 3) && (cmd[2] == 1))
+			return IBMASM_CMD_TIMEOUT_EXTRA;
+	} else if (header->command_size == 2) {
+		if ((cmd[0] == 7) && (cmd[1] == 1))
+			return IBMASM_CMD_TIMEOUT_EXTRA;
+		if (cmd[0] == 8)
+			return IBMASM_CMD_TIMEOUT_EXTRA;
+	}
+	return IBMASM_CMD_TIMEOUT_NORMAL;
+}
+
+#endif /* __DOT_COMMAND_H__ */
diff --git a/drivers/misc/ibmasm/event.c b/drivers/misc/ibmasm/event.c
new file mode 100644
index 00000000000..e100f34f158
--- /dev/null
+++ b/drivers/misc/ibmasm/event.c
@@ -0,0 +1,169 @@
+
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com> 
+ *
+ */
+
+#include "ibmasm.h"
+
+/*
+ * ASM service processor event handling routines.
+ *
+ * Events are signalled to the device drivers through interrupts.
+ * They have the format of dot commands, with the type field set to
+ * sp_event.
+ * The driver does not interpret the events, it simply stores them in a
+ * circular buffer.
+ */
+
+
+static void wake_up_event_readers(struct service_processor *sp)
+{
+	struct event_reader *reader;
+
+	list_for_each_entry(reader, &sp->event_buffer->readers, node)
+                wake_up_interruptible(&reader->wait);
+}
+
+/**
+ * receive_event
+ * Called by the interrupt handler when a dot command of type sp_event is
+ * received.
+ * Store the event in the circular event buffer, wake up any sleeping
+ * event readers.
+ * There is no reader marker in the buffer, therefore readers are
+ * responsible for keeping up with the writer, or they will loose events.
+ */ 
+void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size)
+{
+	struct event_buffer *buffer = sp->event_buffer;
+	struct ibmasm_event *event;
+	unsigned long flags;
+
+	data_size = min(data_size, IBMASM_EVENT_MAX_SIZE);
+
+	spin_lock_irqsave(&sp->lock, flags);
+	/* copy the event into the next slot in the circular buffer */
+	event = &buffer->events[buffer->next_index];
+	memcpy(event->data, data, data_size);
+	event->data_size = data_size;
+	event->serial_number = buffer->next_serial_number;
+
+	/* advance indices in the buffer */
+	buffer->next_index = (buffer->next_index + 1) % IBMASM_NUM_EVENTS;
+	buffer->next_serial_number++;
+	spin_unlock_irqrestore(&sp->lock, flags);
+
+	wake_up_event_readers(sp);
+}
+
+static inline int event_available(struct event_buffer *b, struct event_reader *r)
+{
+	return 	(r->next_serial_number < b->next_serial_number);
+}
+
+/**
+ * get_next_event
+ * Called by event readers (initiated from user space through the file
+ * system). 
+ * Sleeps until a new event is available.
+ */
+int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader)
+{
+	struct event_buffer *buffer = sp->event_buffer;
+	struct ibmasm_event *event;
+	unsigned int index;
+	unsigned long flags;
+
+	if (wait_event_interruptible(reader->wait, event_available(buffer, reader)))
+		return -ERESTARTSYS;
+
+	if (!event_available(buffer, reader))
+		return 0;
+
+	spin_lock_irqsave(&sp->lock, flags);
+
+	index = buffer->next_index;
+	event = &buffer->events[index];
+	while (event->serial_number < reader->next_serial_number) {
+		index = (index + 1) % IBMASM_NUM_EVENTS;
+		event = &buffer->events[index];
+	}
+	memcpy(reader->data, event->data, event->data_size);
+	reader->data_size = event->data_size;
+	reader->next_serial_number = event->serial_number + 1;
+
+	spin_unlock_irqrestore(&sp->lock, flags);
+
+	return event->data_size;
+}
+
+void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader)
+{
+	unsigned long flags;
+
+	reader->next_serial_number = sp->event_buffer->next_serial_number;
+	init_waitqueue_head(&reader->wait);
+	spin_lock_irqsave(&sp->lock, flags);
+	list_add(&reader->node, &sp->event_buffer->readers);
+	spin_unlock_irqrestore(&sp->lock, flags);
+}
+
+void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader)
+{
+	unsigned long flags;
+
+	wake_up_interruptible(&reader->wait);
+
+	spin_lock_irqsave(&sp->lock, flags);
+	list_del(&reader->node);
+	spin_unlock_irqrestore(&sp->lock, flags);
+}
+
+int ibmasm_event_buffer_init(struct service_processor *sp)
+{
+	struct event_buffer *buffer;
+	struct ibmasm_event *event;
+	int i;
+
+	buffer = kmalloc(sizeof(struct