staging: unisys: move visorchipset files to visorbus

Move visorchipset_main.c and visorchipset.h to visorbus/visorchipset.c and
visorbus/visorbus_private.h.  This leaves an empty visorchipset directory
which can also be destroyed.

As a result of this patch the visorchipset init code now calls the
visorbus_init() directly.  Similarily the visorchipset exit code now
cleans up by calling visorbus_exit().

No other functional changes were made.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 2863 deletions

diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c b/drivers/staging/unisys/visorchipset/visorchipset_main.c
deleted file mode 100644
index dc9f1dc18306..000000000000
--- a/drivers/staging/unisys/visorchipset/visorchipset_main.c
+++ /dev/null
@@ -1,2863 +0,0 @@
-/* visorchipset_main.c
- *
- * Copyright (C) 2010 - 2013 UNISYS CORPORATION
- * All rights reserved.
- *
- * 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, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- */
-
-#include "memregion.h"
-#include "controlvmchannel.h"
-#include "version.h"
-#include "procobjecttree.h"
-#include "visorbus.h"
-#include "periodic_work.h"
-#include "uisutils.h"
-#include "controlvmcompletionstatus.h"
-#include "guestlinuxdebug.h"
-#include "visorchipset.h"
-
-
-#include <linux/ctype.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/nls.h>
-#include <linux/netdevice.h>
-#include <linux/platform_device.h>
-#include <linux/uuid.h>
-#include <linux/crash_dump.h>
-
-#define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c
-#define TEST_VNIC_PHYSITF "eth0"	/* physical network itf for
-					 * vnic loopback test */
-#define TEST_VNIC_SWITCHNO 1
-#define TEST_VNIC_BUSNO 9
-
-#define MAX_NAME_SIZE 128
-#define MAX_IP_SIZE   50
-#define MAXOUTSTANDINGCHANNELCOMMAND 256
-#define POLLJIFFIES_CONTROLVMCHANNEL_FAST   1
-#define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100
-
-#define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128)
-/*
- * Module parameters
- */
-static int visorchipset_testvnic;
-static int visorchipset_testvnicclient;
-static int visorchipset_testmsg;
-static int visorchipset_major;
-static int visorchipset_serverregwait;
-static int visorchipset_clientregwait = 1;	/* default is on */
-static int visorchipset_testteardown;
-static int visorchipset_disable_controlvm;
-static int visorchipset_holdchipsetready;
-static unsigned long controlvm_payload_bytes_buffered;
-
-static int
-visorchipset_open(struct inode *inode, struct file *file)
-{
-	unsigned minor_number = iminor(inode);
-
-	if (minor_number)
-		return -ENODEV;
-	file->private_data = NULL;
-	return 0;
-}
-
-static int
-visorchipset_release(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-/* When the controlvm channel is idle for at least MIN_IDLE_SECONDS,
-* we switch to slow polling mode.  As soon as we get a controlvm
-* message, we switch back to fast polling mode.
-*/
-#define MIN_IDLE_SECONDS 10
-static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
-static unsigned long most_recent_message_jiffies;	/* when we got our last
-						 * controlvm message */
-static int serverregistered;
-static int clientregistered;
-
-#define MAX_CHIPSET_EVENTS 2
-static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 };
-
-struct parser_context {
-	unsigned long allocbytes;
-	unsigned long param_bytes;
-	u8 *curr;
-	unsigned long bytes_remaining;
-	bool byte_stream;
-	char data[0];
-};
-
-static struct delayed_work periodic_controlvm_work;
-static struct workqueue_struct *periodic_controlvm_workqueue;
-static DEFINE_SEMAPHORE(notifier_lock);
-
-static struct cdev file_cdev;
-static struct visorchannel **file_controlvm_channel;
-static struct controlvm_message_header g_chipset_msg_hdr;
-static const uuid_le spar_diag_pool_channel_protocol_uuid =
-	SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID;
-/* 0xffffff is an invalid Bus/Device number */
-static u32 g_diagpool_bus_no = 0xffffff;
-static u32 g_diagpool_dev_no = 0xffffff;
-static struct controlvm_message_packet g_devicechangestate_packet;
-
-/* Only VNIC and VHBA channels are sent to visorclientbus (aka
- * "visorhackbus")
- */
-#define FOR_VISORHACKBUS(channel_type_guid) \
-	(((uuid_le_cmp(channel_type_guid,\
-		       spar_vnic_channel_protocol_uuid) == 0) ||\
-	(uuid_le_cmp(channel_type_guid,\
-			spar_vhba_channel_protocol_uuid) == 0)))
-#define FOR_VISORBUS(channel_type_guid) (!(FOR_VISORHACKBUS(channel_type_guid)))
-
-#define is_diagpool_channel(channel_type_guid) \
-	(uuid_le_cmp(channel_type_guid,\
-		     spar_diag_pool_channel_protocol_uuid) == 0)
-
-static LIST_HEAD(bus_info_list);
-static LIST_HEAD(dev_info_list);
-
-static struct visorchannel *controlvm_channel;
-
-/* Manages the request payload in the controlvm channel */
-struct visor_controlvm_payload_info {
-	u8 __iomem *ptr;	/* pointer to base address of payload pool */
-	u64 offset;		/* offset from beginning of controlvm
-				 * channel to beginning of payload * pool */
-	u32 bytes;		/* number of bytes in payload pool */
-};
-
-static struct visor_controlvm_payload_info controlvm_payload_info;
-
-/* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE /
- * CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation.
- */
-struct visor_livedump_info {
-	struct controlvm_message_header dumpcapture_header;
-	struct controlvm_message_header gettextdump_header;
-	struct controlvm_message_header dumpcomplete_header;
-	bool gettextdump_outstanding;
-	u32 crc32;
-	unsigned long length;
-	atomic_t buffers_in_use;
-	unsigned long destination;
-};
-
-static struct visor_livedump_info livedump_info;
-
-/* The following globals are used to handle the scenario where we are unable to
- * offload the payload from a controlvm message due to memory requirements.  In
- * this scenario, we simply stash the controlvm message, then attempt to
- * process it again the next time controlvm_periodic_work() runs.
- */
-static struct controlvm_message controlvm_pending_msg;
-static bool controlvm_pending_msg_valid = false;
-
-/* This identifies a data buffer that has been received via a controlvm messages
- * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation.
- */
-struct putfile_buffer_entry {
-	struct list_head next;	/* putfile_buffer_entry list */
-	struct parser_context *parser_ctx; /* points to input data buffer */
-};
-
-/* List of struct putfile_request *, via next_putfile_request member.
- * Each entry in this list identifies an outstanding TRANSMIT_FILE
- * conversation.
- */
-static LIST_HEAD(putfile_request_list);
-
-/* This describes a buffer and its current state of transfer (e.g., how many
- * bytes have already been supplied as putfile data, and how many bytes are
- * remaining) for a putfile_request.
- */
-struct putfile_active_buffer {
-	/* a payload from a controlvm message, containing a file data buffer */
-	struct parser_context *parser_ctx;
-	/* points within data area of parser_ctx to next byte of data */
-	u8 *pnext;
-	/* # bytes left from <pnext> to the end of this data buffer */
-	size_t bytes_remaining;
-};
-
-#define PUTFILE_REQUEST_SIG 0x0906101302281211
-/* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE
- * conversation.  Structs of this type are dynamically linked into
- * <Putfile_request_list>.
- */
-struct putfile_request {
-	u64 sig;		/* PUTFILE_REQUEST_SIG */
-
-	/* header from original TransmitFile request */
-	struct controlvm_message_header controlvm_header;
-	u64 file_request_number;	/* from original TransmitFile request */
-
-	/* link to next struct putfile_request */
-	struct list_head next_putfile_request;
-
-	/* most-recent sequence number supplied via a controlvm message */
-	u64 data_sequence_number;
-
-	/* head of putfile_buffer_entry list, which describes the data to be
-	 * supplied as putfile data;
-	 * - this list is added to when controlvm messages come in that supply
-	 * file data
-	 * - this list is removed from via the hotplug program that is actually
-	 * consuming these buffers to write as file data */
-	struct list_head input_buffer_list;
-	spinlock_t req_list_lock;	/* lock for input_buffer_list */
-
-	/* waiters for input_buffer_list to go non-empty */
-	wait_queue_head_t input_buffer_wq;
-
-	/* data not yet read within current putfile_buffer_entry */
-	struct putfile_active_buffer active_buf;
-
-	/* <0 = failed, 0 = in-progress, >0 = successful; */
-	/* note that this must be set with req_list_lock, and if you set <0, */
-	/* it is your responsibility to also free up all of the other objects */
-	/* in this struct (like input_buffer_list, active_buf.parser_ctx) */
-	/* before releasing the lock */
-	int completion_status;
-};
-
-struct parahotplug_request {
-	struct list_head list;
-	int id;
-	unsigned long expiration;
-	struct controlvm_message msg;
-};
-
-static LIST_HEAD(parahotplug_request_list);
-static DEFINE_SPINLOCK(parahotplug_request_list_lock);	/* lock for above */
-static void parahotplug_process_list(void);
-
-/* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE /
- * CONTROLVM_REPORTEVENT.
- */
-static struct visorchipset_busdev_notifiers busdev_server_notifiers;
-static struct visorchipset_busdev_notifiers busdev_client_notifiers;
-
-static void bus_create_response(u32 bus_no, int response);
-static void bus_destroy_response(u32 bus_no, int response);
-static void device_create_response(u32 bus_no, u32 dev_no, int response);
-static void device_destroy_response(u32 bus_no, u32 dev_no, int response);
-static void device_resume_response(u32 bus_no, u32 dev_no, int response);
-
-static struct visorchipset_busdev_responders busdev_responders = {
-	.bus_create = bus_create_response,
-	.bus_destroy = bus_destroy_response,
-	.device_create = device_create_response,
-	.device_destroy = device_destroy_response,
-	.device_pause = visorchipset_device_pause_response,
-	.device_resume = device_resume_response,
-};
-
-/* info for /dev/visorchipset */
-static dev_t major_dev = -1; /**< indicates major num for device */
-
-/* prototypes for attributes */
-static ssize_t toolaction_show(struct device *dev,
-			       struct device_attribute *attr, char *buf);
-static ssize_t toolaction_store(struct device *dev,
-				struct device_attribute *attr,
-				const char *buf, size_t count);
-static DEVICE_ATTR_RW(toolaction);
-
-static ssize_t boottotool_show(struct device *dev,
-			       struct device_attribute *attr, char *buf);
-static ssize_t boottotool_store(struct device *dev,
-				struct device_attribute *attr, const char *buf,
-				size_t count);
-static DEVICE_ATTR_RW(boottotool);
-
-static ssize_t error_show(struct device *dev, struct device_attribute *attr,
-			  char *buf);
-static ssize_t error_store(struct device *dev, struct device_attribute *attr,
-			   const char *buf, size_t count);
-static DEVICE_ATTR_RW(error);
-
-static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
-			   char *buf);
-static ssize_t textid_store(struct device *dev, struct device_attribute *attr,
-			    const char *buf, size_t count);
-static DEVICE_ATTR_RW(textid);
-
-static ssize_t remaining_steps_show(struct device *dev,
-				    struct device_attribute *attr, char *buf);
-static ssize_t remaining_steps_store(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t count);
-static DEVICE_ATTR_RW(remaining_steps);
-
-static ssize_t chipsetready_store(struct device *dev,
-				  struct device_attribute *attr,
-				  const char *buf, size_t count);
-static DEVICE_ATTR_WO(chipsetready);
-
-static ssize_t devicedisabled_store(struct device *dev,
-				    struct device_attribute *attr,
-				    const char *buf, size_t count);
-static DEVICE_ATTR_WO(devicedisabled);
-
-static ssize_t deviceenabled_store(struct device *dev,
-				   struct device_attribute *attr,
-				   const char *buf, size_t count);
-static DEVICE_ATTR_WO(deviceenabled);
-
-static struct attribute *visorchipset_install_attrs[] = {
-	&dev_attr_toolaction.attr,
-	&dev_attr_boottotool.attr,
-	&dev_attr_error.attr,
-	&dev_attr_textid.attr,
-	&dev_attr_remaining_steps.attr,
-	NULL
-};
-
-static struct attribute_group visorchipset_install_group = {
-	.name = "install",
-	.attrs = visorchipset_install_attrs
-};
-
-static struct attribute *visorchipset_guest_attrs[] = {
-	&dev_attr_chipsetready.attr,
-	NULL
-};
-
-static struct attribute_group visorchipset_guest_group = {
-	.name = "guest",
-	.attrs = visorchipset_guest_attrs
-};
-
-static struct attribute *visorchipset_parahotplug_attrs[] = {
-	&dev_attr_devicedisabled.attr,
-	&dev_attr_deviceenabled.attr,
-	NULL
-};
-
-static struct attribute_group visorchipset_parahotplug_group = {
-	.name = "parahotplug",
-	.attrs = visorchipset_parahotplug_attrs
-};
-
-static const struct attribute_group *visorchipset_dev_groups[] = {
-	&visorchipset_install_group,
-	&visorchipset_guest_group,
-	&visorchipset_parahotplug_group,
-	NULL
-};
-
-/* /sys/devices/platform/visorchipset */
-static struct platform_device visorchipset_platform_device = {
-	.name = "visorchipset",
-	.id = -1,
-	.dev.groups = visorchipset_dev_groups,
-};
-
-/* Function prototypes */
-static void controlvm_respond(struct controlvm_message_header *msg_hdr,
-			      int response);
-static void controlvm_respond_chipset_init(
-		struct controlvm_message_header *msg_hdr, int response,
-		enum ultra_chipset_feature features);
-static void controlvm_respond_physdev_changestate(
-		struct controlvm_message_header *msg_hdr, int response,
-		struct spar_segment_state state);
-
-
-static struct parser_context *
-parser_init_guts(u64 addr, u32 bytes, bool local,
-		 bool standard_payload_header, bool *retry)
-{
-	int allocbytes = sizeof(struct parser_context) + bytes;
-	struct parser_context *rc = NULL;
-	struct parser_context *ctx = NULL;
-	struct memregion *rgn = NULL;
-	struct spar_controlvm_parameters_header *phdr = NULL;
-
-	if (retry)
-		*retry = false;
-	if (!standard_payload_header)
-		/* alloc and 0 extra byte to ensure payload is
-		 * '\0'-terminated
-		 */
-		allocbytes++;
-	if ((controlvm_payload_bytes_buffered + bytes)
-	    > MAX_CONTROLVM_PAYLOAD_BYTES) {
-		if (retry)
-			*retry = true;
-		rc = NULL;
-		goto cleanup;
-	}
-	ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY);
-	if (!ctx) {
-		if (retry)
-			*retry = true;
-		rc = NULL;
-		goto cleanup;
-	}
-
-	ctx->allocbytes = allocbytes;
-	ctx->param_bytes = bytes;
-	ctx->curr = NULL;
-	ctx->bytes_remaining = 0;
-	ctx->byte_stream = false;
-	if (local) {
-		void *p;
-
-		if (addr > virt_to_phys(high_memory - 1)) {
-			rc = NULL;
-			goto cleanup;
-		}
-		p = __va((unsigned long) (addr));
-		memcpy(ctx->data, p, bytes);
-	} else {
-		rgn = visor_memregion_create(addr, bytes);
-		if (!rgn) {
-			rc = NULL;
-			goto cleanup;
-		}
-		if (visor_memregion_read(rgn, 0, ctx->data, bytes) < 0) {
-			rc = NULL;
-			goto cleanup;
-		}
-	}
-	if (!standard_payload_header) {
-		ctx->byte_stream = true;
-		rc = ctx;
-		goto cleanup;
-	}
-	phdr = (struct spar_controlvm_parameters_header *)(ctx->data);
-	if (phdr->total_length != bytes) {
-		rc = NULL;
-		goto cleanup;
-	}
-	if (phdr->total_length < phdr->header_length) {
-		rc = NULL;
-		goto cleanup;
-	}
-	if (phdr->header_length <
-	    sizeof(struct spar_controlvm_parameters_header)) {
-		rc = NULL;
-		goto cleanup;
-	}
-
-	rc = ctx;
-cleanup:
-	if (rgn) {
-		visor_memregion_destroy(rgn);
-		rgn = NULL;
-	}
-	if (rc) {
-		controlvm_payload_bytes_buffered += ctx->param_bytes;
-	} else {
-		if (ctx) {
-			parser_done(ctx);
-			ctx = NULL;
-		}
-	}
-	return rc;
-}
-
-struct parser_context *
-parser_init(u64 addr, u32 bytes, bool local, bool *retry)
-{
-	return parser_init_guts(addr, bytes, local, true, retry);
-}
-
-/* Call this instead of parser_init() if the payload area consists of just
- * a sequence of bytes, rather than a struct spar_controlvm_parameters_header
- * structures.  Afterwards, you can call parser_simpleString_get() or
- * parser_byteStream_get() to obtain the data.
- */
-struct parser_context *
-parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry)
-{
-	return parser_init_guts(addr, bytes, local, false, retry);
-}
-
-/* Obtain '\0'-terminated copy of string in payload area.
- */
-char *
-parser_simpleString_get(struct parser_context *ctx)
-{
-	if (!ctx->byte_stream)
-		return NULL;
-	return ctx->data;	/* note this IS '\0'-terminated, because of
-				 * the num of bytes we alloc+clear in
-				 * parser_init_byteStream() */
-}
-
-/* Obtain a copy of the buffer in the payload area.
- */
-void *parser_byte_stream_get(struct parser_context *ctx, unsigned long *nbytes)
-{
-	if (!ctx->byte_stream)
-		return NULL;
-	if (nbytes)
-		*nbytes = ctx->param_bytes;
-	return (void *)ctx->data;
-}
-
-uuid_le
-parser_id_get(struct parser_context *ctx)
-{
-	struct spar_controlvm_parameters_header *phdr = NULL;
-
-	if (ctx == NULL)
-		return NULL_UUID_LE;
-	phdr = (struct spar_controlvm_parameters_header *)(ctx->data);
-	return phdr->id;
-}
-
-void
-parser_param_start(struct parser_context *ctx, PARSER_WHICH_STRING which_string)
-{
-	struct spar_controlvm_parameters_header *phdr = NULL;
-
-	if (ctx == NULL)
-		goto Away;
-	phdr = (struct spar_controlvm_parameters_header *)(ctx->data);
-	switch (which_string) {
-	case PARSERSTRING_INITIATOR:
-		ctx->curr = ctx->data + phdr->initiator_offset;
-		ctx->bytes_remaining = phdr->initiator_length;
-		break;
-	case PARSERSTRING_TARGET:
-		ctx->curr = ctx->data + phdr->target_offset;
-		ctx->bytes_remaining = phdr->target_length;
-		break;
-	case PARSERSTRING_CONNECTION:
-		ctx->curr = ctx->data + phdr->connection_offset;
-		ctx->bytes_remaining = phdr->connection_length;
-		break;
-	case PARSERSTRING_NAME:
-		ctx->curr = ctx->data + phdr->name_offset;
-		ctx->bytes_remaining = phdr->name_length;
-		break;
-	default:
-		break;
-	}
-
-Away:
-	return;
-}
-
-void
-parser_done(struct parser_context *ctx)
-{
-	if (!ctx)
-		return;
-	controlvm_payload_bytes_buffered -= ctx->param_bytes;
-	kfree(ctx);
-}
-
-/** Return length of string not counting trailing spaces. */
-static int
-string_length_no_trail(char *s, int len)
-{
-	int i = len - 1;
-
-	while (i >= 0) {
-		if (!isspace(s[i]))
-			return i + 1;
-		i--;
-	}
-	return 0;
-}
-
-/** Grab the next name and value out of the parameter buffer.
- *  The entire parameter buffer looks like this:
- *      <name>=<value>\0
- *      <name>=<value>\0
- *      ...
- *      \0
- *  If successful, the next <name> value is returned within the supplied
- *  <nam> buffer (the value is always upper-cased), and the corresponding
- *  <value> is returned within a kmalloc()ed buffer, whose pointer is
- *  provided as the return value of this function.
- *  (The total number of bytes allocated is strlen(<value>)+1.)
- *
- *  NULL is returned to indicate failure, which can occur for several reasons:
- *  - all <name>=<value> pairs have already been processed
- *  - bad parameter
- *  - parameter buffer ends prematurely (couldn't find an '=' or '\0' within
- *    the confines of the parameter buffer)
- *  - the <nam> buffer is not large enough to hold the <name> of the next
- *    parameter
- */
-void *
-parser_param_get(struct parser_context *ctx, char *nam, int namesize)
-{
-	u8 *pscan, *pnam = nam;
-	unsigned long nscan;
-	int value_length = -1, orig_value_length = -1;
-	void *value = NULL;
-	int i;
-	int closing_quote = 0;
-
-	if (!ctx)
-		return NULL;
-	pscan = ctx->curr;
-	nscan = ctx->bytes_remaining;
-	if (nscan == 0)
-		return NULL;
-	if (*pscan == '\0')
-		/*  This is the normal return point after you have processed
-		 *  all of the <name>=<value> pairs in a syntactically-valid
-		 *  parameter buffer.
-		 */
-		return NULL;
-
-	/* skip whitespace */
-	while (isspace(*pscan)) {
-		pscan++;
-		nscan--;
-		if (nscan == 0)
-			return NULL;
-	}
-
-	while (*pscan != ':') {
-		if (namesize <= 0)
-			return NULL;
-		*pnam = toupper(*pscan);
-		pnam++;
-		namesize--;
-		pscan++;
-		nscan--;
-		if (nscan == 0)
-			return NULL;
-	}
-	if (namesize <= 0)
-		return NULL;
-	*pnam = '\0';
-	nam[string_length_no_trail(nam, strlen(nam))] = '\0';
-
-	/* point to char immediately after ":" in "<name>:<value>" */
-	pscan++;
-	nscan--;
-	/* skip whitespace */
-	while (isspace(*pscan)) {
-		pscan++;
-		nscan--;
-		if (nscan == 0)
-			return NULL;
-	}
-	if (nscan == 0)
-		return NULL;
-	if (*pscan == '\'' || *pscan == '"') {
-		closing_quote = *pscan;
-		pscan++;
-		nscan--;
-		if (nscan == 0)
-			return NULL;
-	}
-
-	/* look for a separator character, terminator character, or
-	 * end of data
-	 */
-	for (i = 0, value_length = -1; i < nscan; i++) {
-		if (closing_quote) {
-			if (pscan[i] == '\0')
-				return NULL;
-			if (pscan[i] == closing_quote) {
-				value_length = i;
-				break;
-			}
-		} else
-		    if (pscan[i] == ',' || pscan[i] == ';'
-			|| pscan[i] == '\0') {
-			value_length = i;
-			break;
-		}
-	}
-	if (value_length < 0) {
-		if (closing_quote)
-			return NULL;
-		value_length = nscan;
-	}
-	orig_value_length = value_length;
-	if (closing_quote == 0)
-		value_length = string_length_no_trail(pscan, orig_value_length);
-	value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY);
-	if (value == NULL)
-		return NULL;
-	memcpy(value, pscan, value_length);
-	((u8 *) (value))[value_length] = '\0';
-
-	pscan += orig_value_length;
-	nscan -= orig_value_length;
-
-	/* skip past separator or closing quote */
-	if (nscan > 0) {
-		if (*pscan != '\0') {
-			pscan++;
-			nscan--;
-		}
-	}
-
-	if (closing_quote && (nscan > 0)) {
-		/* we still need to skip around the real separator if present */
-		/* first, skip whitespace */
-		while (isspace(*pscan)) {
-			pscan++;
-			nscan--;
-			if (nscan == 0)
-				break;
-		}
-		if (nscan > 0) {
-			if (*pscan == ',' || *pscan == ';') {
-				pscan++;
-				nscan--;
-			} else if (*pscan != '\0') {
-				kfree(value);
-				value = NULL;
-				return NULL;
-			}
-		}
-	}
-	ctx->curr = pscan;
-	ctx->bytes_remaining = nscan;
-	return value;
-}
-
-void *
-parser_string_get(struct parser_context *ctx)
-{
-	u8 *pscan;
-	unsigned long nscan;
-	int value_length = -1;
-	void *value = NULL;
-	int i;
-
-	if (!ctx)
-		return NULL;
-	pscan = ctx->curr;
-	nscan = ctx->bytes_remaining;
-	if (nscan == 0)
-		return NULL;
-	if (!pscan)
-		return NULL;
-	for (i = 0, value_length = -1; i < nscan; i++)
-		if (pscan[i] == '\0') {
-			value_length = i;
-			break;
-		}
-	if (value_length < 0)	/* '\0' was not included in the length */
-		value_length = nscan;
-	value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY);
-	if (value == NULL)
-		return NULL;
-	if (value_length > 0)
-		memcpy(value, pscan, value_length);
-	((u8 *) (value))[value_length] = '\0';
-	return value;
-}
-
-
-static ssize_t toolaction_show(struct device *dev,
-			       struct device_attribute *attr,
-			       char *buf)
-{
-	u8 tool_action;
-
-	visorchannel_read(controlvm_channel,
-		offsetof(struct spar_controlvm_channel_protocol,
-			 tool_action), &tool_action, sizeof(u8));
-	return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action);
-}
-
-static ssize_t toolaction_store(struct device *dev,
-				struct device_attribute *attr,
-				const char *buf, size_t count)
-{
-	u8 tool_action;
-	int ret;
-
-	if (kstrtou8(buf, 10, &tool_action))
-		return -EINVAL;
-
-	ret = visorchannel_write(controlvm_channel,
-		offsetof(struct spar_controlvm_channel_protocol,
-			 tool_action),
-		&tool_action, sizeof(u8));
-
-	if (ret)
-		return ret;
-	return count;
-}
-
-static ssize_t boottotool_show(struct device *dev,
-			       struct device_attribute *attr,
-			       char *buf)
-{
-	struct efi_spar_indication efi_spar_indication;
-
-	visorchannel_read(controlvm_channel,
-			  offsetof(struct spar_controlvm_channel_protocol,
-				   efi_spar_ind), &efi_spar_indication,
-			  sizeof(struct efi_spar_indication));
-	return scnprintf(buf, PAGE_SIZE, "%u\n",
-			 efi_spar_indication.boot_to_tool);
-}
-
-static ssize_t boottotool_store(struct device *dev,
-				struct device_attribute *attr,
-				const char *buf, size_t count)
-{
-	int val, ret;
-	struct efi_spar_indication efi_spar_indication;
-
-	if (kstrtoint(buf, 10, &val))
-		return -EINVAL;
-
-	efi_spar_indication.boot_to_tool = val;
-	ret = visorchannel_write(controlvm_channel,
-			offsetof(struct spar_controlvm_channel_protocol,
-				 efi_spar_ind), &(efi_spar_indication),
-				 sizeof(struct efi_spar_indication));
-
-	if (ret)
-		return ret;
-	return count;
-}
-
-static ssize_t error_show(struct device *dev, struct device_attribute *attr,
-			  char *buf)
-{
-	u32 error;
-
-	visorchannel_read(controlvm_channel,
-			  offsetof(struct spar_controlvm_channel_protocol,
-				   installation_error),
-			  &error, sizeof(u32));
-	return scnprintf(buf, PAGE_SIZE, "%i\n", error);
-}
-
-static ssize_t error_store(struct device *dev, struct device_attribute *attr,
-			   const char *buf, size_t count)
-{
-	u32 error;
-	int ret;
-
-	if (kstrtou32(buf, 10, &error))
-		return -EINVAL;
-
-	ret = visorchannel_write(controlvm_channel,
-		offsetof(struct spar_controlvm_channel_protocol,
-			 installation_error),
-		&error, sizeof(u32));
-	if (ret)
-		return ret;
-	return count;
-}
-
-static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
-			   char *buf)
-{
-	u32 text_id;
-
-	visorchannel_read(controlvm_channel,
-			  offsetof(struct spar_controlvm_channel_protocol,
-				   installation_text_id),
-			  &text_id, sizeof(u32));
-	return scnprintf(buf, PAGE_SIZE, "%i\n", text_id);
-}
-
-static ssize_t textid_store(struct device *dev, struct device_attribute *attr,
-			    const char *buf, size_t count)
-{
-	u32 text_id;
-	int ret;
-
-	if (kstrtou32(buf, 10, &text_id))
-		return -EINVAL;
-
-	ret = visorchannel_write(controlvm_channel,
-		offsetof(struct spar_controlvm_channel_protocol,
-			 installation_text_id),
-		&text_id, sizeof(u32));
-	if (ret)
-		return ret;
-	return count;
-}
-
-static ssize_t remaining_steps_show(struct device *dev,
-				    struct device_attribute *attr, char *buf)
-{
-	u16 remaining_steps;
-
-	visorchannel_read(controlvm_channel,
-			  offsetof(struct spar_controlvm_channel_protocol,
-				   installation_remaining_steps),
-			  &remaining_steps, sizeof(u16));
-	return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps);
-}
-
-static ssize_t remaining_steps_store(struct device *dev,
-				     struct device_attribute *attr,
-				     const char *buf, size_t count)
-{
-	u16 remaining_steps;
-	int ret;
-
-	if (kstrtou16(buf, 10, &remaining_steps))
-		return -EINVAL;
-
-	ret = visorchannel_write(controlvm_channel,
-		offsetof(struct spar_controlvm_channel_protocol,
-			 installation_remaining_steps),
-		&remaining_steps, sizeof(u16));
-	if (ret)
-		return ret;
-	return count;
-}
-
-static void
-bus_info_clear(void *v)
-{
-	struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) v;
-
-	kfree(p->name);
-	kfree(p->description);
-	memset(p, 0, sizeof(struct visorchipset_bus_info));
-}
-
-static void
-dev_info_clear(void *v)
-{
-	struct visorchipset_device_info *p =
-		(struct visorchipset_device_info *) v;
-
-	memset(p, 0, sizeof(struct visorchipset_device_info));
-}
-
-static struct visorchipset_bus_info *
-bus_find(struct list_head *list, u32 bus_no)
-{
-	struct visorchipset_bus_info *p;
-
-	list_for_each_entry(p, list, entry) {
-		if (p->bus_no == bus_no)
-			return p;
-	}
-
-	return NULL;
-}
-
-static struct visorchipset_device_info *
-device_find(struct list_head *list, u32 bus_no, u32 dev_no)
-{
-	struct visorchipset_device_info *p;
-
-	list_for_each_entry(p, list, entry) {
-		if (p->bus_no == bus_no && p->dev_no == dev_no)
-			return p;
-	}
-
-	return NULL;
-}
-
-static void busdevices_del(struct list_head *list, u32 bus_no)
-{
-	struct visorchipset_device_info *p, *tmp;
-
-	list_for_each_entry_safe(p, tmp, list, entry) {
-		if (p->bus_no == bus_no) {
-			list_del(&p->entry);
-			kfree(p);
-		}
-	}
-}
-
-static u8
-check_chipset_events(void)
-{
-	int i;
-	u8 send_msg = 1;
-	/* Check events to determine if response should be sent */
-	for (i = 0; i < MAX_CHIPSET_EVENTS; i++)
-		send_msg &= chipset_events[i];
-	return send_msg;
-}
-
-static void
-clear_chipset_events(void)
-{
-	int i;
-	/* Clear chipset_events */
-	for (i = 0; i < MAX_CHIPSET_EVENTS; i++)
-		chipset_events[i] = 0;
-}
-
-void
-visorchipset_register_busdev_server(
-			struct visorchipset_busdev_notifiers *notifiers,
-			struct visorchipset_busdev_responders *responders,
-			struct ultra_vbus_deviceinfo *driver_info)
-{
-	down(&notifier_lock);
-	if (!notifiers) {
-		memset(&busdev_server_notifiers, 0,
-		       sizeof(busdev_server_notifiers));
-		serverregistered = 0;	/* clear flag */
-	} else {
-		busdev_server_notifiers = *notifiers;
-		serverregistered = 1;	/* set flag */
-	}
-	if (responders)
-		*responders = busdev_responders;
-	if (driver_info)
-		bus_device_info_init(driver_info, "chipset", "visorchipset",
-				     VERSION, NULL);
-
-	up(&notifier_lock);
-}
-EXPORT_SYMBOL_GPL(visorchipset_register_busdev_server);
-
-void
-visorchipset_register_busdev_client(
-			struct visorchipset_busdev_notifiers *notifiers,
-			struct visorchipset_busdev_responders *responders,
-			struct ultra_vbus_deviceinfo *driver_info)
-{
-	down(&notifier_lock);
-	if (!notifiers) {
-		memset(&busdev_client_notifiers, 0,
-		       sizeof(busdev_client_notifiers));
-		clientregistered = 0;	/* clear flag */
-	} else {
-		busdev_client_notifiers = *notifiers;
-		clientregistered = 1;	/* set flag */
-	}
-	if (responders)
-		*responders = busdev_responders;
-	if (driver_info)
-		bus_device_info_init(driver_info, "chipset(bolts)",
-				     "visorchipset", VERSION, NULL);
-	up(&notifier_lock);
-}
-EXPORT_SYMBOL_GPL(visorchipset_register_busdev_client);
-
-static void
-cleanup_controlvm_structures(void)
-{
-	struct visorchipset_bus_info *bi, *tmp_bi;
-	struct visorchipset_device_info *di, *tmp_di;
-
-	list_for_each_entry_safe(bi, tmp_bi, &bus_info_list, entry) {
-		bus_info_clear(bi);
-		list_del(&bi->entry);
-		kfree(bi);
-	}
-
-	list_for_each_entry_safe(di, tmp_di, &dev_info_list, entry) {
-		dev_info_clear(di);
-		list_del(&di->entry);
-		kfree(di);
-	}
-}
-
-static void
-chipset_init(struct controlvm_message *inmsg)
-{
-	static int chipset_inited;
-	enum ultra_chipset_feature features = 0;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO);
-	if (chipset_inited) {
-		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
-		goto cleanup;
-	}
-	chipset_inited = 1;
-	POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO);
-
-	/* Set features to indicate we support parahotplug (if Command
-	 * also supports it). */
-	features =
-	    inmsg->cmd.init_chipset.
-	    features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG;
-
-	/* Set the "reply" bit so Command knows this is a
-	 * features-aware driver. */
-	features |= ULTRA_CHIPSET_FEATURE_REPLY;
-
-cleanup:
-	if (rc < 0)
-		cleanup_controlvm_structures();
-	if (inmsg->hdr.flags.response_expected)
-		controlvm_respond_chipset_init(&inmsg->hdr, rc, features);
-}
-
-static void
-controlvm_init_response(struct controlvm_message *msg,
-			struct controlvm_message_header *msg_hdr, int response)
-{
-	memset(msg, 0, sizeof(struct controlvm_message));
-	memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header));
-	msg->hdr.payload_bytes = 0;
-	msg->hdr.payload_vm_offset = 0;
-	msg->hdr.payload_max_bytes = 0;
-	if (response < 0) {
-		msg->hdr.flags.failed = 1;
-		msg->hdr.completion_status = (u32) (-response);
-	}
-}
-
-static void
-controlvm_respond(struct controlvm_message_header *msg_hdr, int response)
-{
-	struct controlvm_message outmsg;
-
-	controlvm_init_response(&outmsg, msg_hdr, response);
-	/* For DiagPool channel DEVICE_CHANGESTATE, we need to send
-	* back the deviceChangeState structure in the packet. */
-	if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE &&
-	    g_devicechangestate_packet.device_change_state.bus_no ==
-	    g_diagpool_bus_no &&
-	    g_devicechangestate_packet.device_change_state.dev_no ==
-	    g_diagpool_dev_no)
-		outmsg.cmd = g_devicechangestate_packet;
-	if (outmsg.hdr.flags.test_message == 1)
-		return;
-
-	if (!visorchannel_signalinsert(controlvm_channel,
-				       CONTROLVM_QUEUE_REQUEST, &outmsg)) {
-		return;
-	}
-}
-
-static void
-controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr,
-			       int response,
-			       enum ultra_chipset_feature features)
-{
-	struct controlvm_message outmsg;
-
-	controlvm_init_response(&outmsg, msg_hdr, response);
-	outmsg.cmd.init_chipset.features = features;
-	if (!visorchannel_signalinsert(controlvm_channel,
-				       CONTROLVM_QUEUE_REQUEST, &outmsg)) {
-		return;
-	}
-}
-
-static void controlvm_respond_physdev_changestate(
-		struct controlvm_message_header *msg_hdr, int response,
-		struct spar_segment_state state)
-{
-	struct controlvm_message outmsg;
-
-	controlvm_init_response(&outmsg, msg_hdr, response);
-	outmsg.cmd.device_change_state.state = state;
-	outmsg.cmd.device_change_state.flags.phys_device = 1;
-	if (!visorchannel_signalinsert(controlvm_channel,
-				       CONTROLVM_QUEUE_REQUEST, &outmsg)) {
-		return;
-	}
-}
-
-void
-visorchipset_save_message(struct controlvm_message *msg,
-			  enum crash_obj_type type)
-{
-	u32 crash_msg_offset;
-	u16 crash_msg_count;
-
-	/* get saved message count */
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       saved_crash_message_count),
-			      &crash_msg_count, sizeof(u16)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	if (crash_msg_count != CONTROLVM_CRASHMSG_MAX) {
-		POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC,
-				 crash_msg_count,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* get saved crash message offset */
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       saved_crash_message_offset),
-			      &crash_msg_offset, sizeof(u32)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	if (type == CRASH_BUS) {
-		if (visorchannel_write(controlvm_channel,
-				       crash_msg_offset,
-				       msg,
-				       sizeof(struct controlvm_message)) < 0) {
-			POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC,
-					 POSTCODE_SEVERITY_ERR);
-			return;
-		}
-	} else {
-		if (visorchannel_write(controlvm_channel,
-				       crash_msg_offset +
-				       sizeof(struct controlvm_message), msg,
-				       sizeof(struct controlvm_message)) < 0) {
-			POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC,
-					 POSTCODE_SEVERITY_ERR);
-			return;
-		}
-	}
-}
-EXPORT_SYMBOL_GPL(visorchipset_save_message);
-
-static void
-bus_responder(enum controlvm_id cmd_id, u32 bus_no, int response)
-{
-	struct visorchipset_bus_info *p;
-	bool need_clear = false;
-
-	p = bus_find(&bus_info_list, bus_no);
-	if (!p)
-		return;
-
-	if (response < 0) {
-		if ((cmd_id == CONTROLVM_BUS_CREATE) &&
-		    (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE)))
-			/* undo the row we just created... */
-			busdevices_del(&dev_info_list, bus_no);
-	} else {
-		if (cmd_id == CONTROLVM_BUS_CREATE)
-			p->state.created = 1;
-		if (cmd_id == CONTROLVM_BUS_DESTROY)
-			need_clear = true;
-	}
-
-	if (p->pending_msg_hdr.id == CONTROLVM_INVALID)
-		return;		/* no controlvm response needed */
-	if (p->pending_msg_hdr.id != (u32)cmd_id)
-		return;
-	controlvm_respond(&p->pending_msg_hdr, response);
-	p->pending_msg_hdr.id = CONTROLVM_INVALID;
-	if (need_clear) {
-		bus_info_clear(p);
-		busdevices_del(&dev_info_list, bus_no);
-	}
-}
-
-static void
-device_changestate_responder(enum controlvm_id cmd_id,
-			     u32 bus_no, u32 dev_no, int response,
-			     struct spar_segment_state response_state)
-{
-	struct visorchipset_device_info *p;
-	struct controlvm_message outmsg;
-
-	p = device_find(&dev_info_list, bus_no, dev_no);
-	if (!p)
-		return;
-	if (p->pending_msg_hdr.id == CONTROLVM_INVALID)
-		return;		/* no controlvm response needed */
-	if (p->pending_msg_hdr.id != cmd_id)
-		return;
-
-	controlvm_init_response(&outmsg, &p->pending_msg_hdr, response);
-
-	outmsg.cmd.device_change_state.bus_no = bus_no;
-	outmsg.cmd.device_change_state.dev_no = dev_no;
-	outmsg.cmd.device_change_state.state = response_state;
-
-	if (!visorchannel_signalinsert(controlvm_channel,
-				       CONTROLVM_QUEUE_REQUEST, &outmsg))
-		return;
-
-	p->pending_msg_hdr.id = CONTROLVM_INVALID;
-}
-
-static void
-device_responder(enum controlvm_id cmd_id, u32 bus_no, u32 dev_no, int response)
-{
-	struct visorchipset_device_info *p;
-	bool need_clear = false;
-
-	p = device_find(&dev_info_list, bus_no, dev_no);
-	if (!p)
-		return;
-	if (response >= 0) {
-		if (cmd_id == CONTROLVM_DEVICE_CREATE)
-			p->state.created = 1;
-		if (cmd_id == CONTROLVM_DEVICE_DESTROY)
-			need_clear = true;
-	}
-
-	if (p->pending_msg_hdr.id == CONTROLVM_INVALID)
-		return;		/* no controlvm response needed */
-
-	if (p->pending_msg_hdr.id != (u32)cmd_id)
-		return;
-
-	controlvm_respond(&p->pending_msg_hdr, response);
-	p->pending_msg_hdr.id = CONTROLVM_INVALID;
-	if (need_clear)
-		dev_info_clear(p);
-}
-
-static void
-bus_epilog(u32 bus_no,
-	   u32 cmd, struct controlvm_message_header *msg_hdr,
-	   int response, bool need_response)
-{
-	struct visorchipset_bus_info *bus_info;
-	bool notified = false;
-
-	bus_info = bus_find(&bus_info_list, bus_no);
-
-	if (!bus_info)
-		return;
-
-	if (need_response) {
-		memcpy(&bus_info->pending_msg_hdr, msg_hdr,
-		       sizeof(struct controlvm_message_header));
-	} else {
-		bus_info->pending_msg_hdr.id = CONTROLVM_INVALID;
-	}
-
-	down(&notifier_lock);
-	if (response == CONTROLVM_RESP_SUCCESS) {
-		switch (cmd) {
-		case CONTROLVM_BUS_CREATE:
-			/* We can't tell from the bus_create
-			* information which of our 2 bus flavors the
-			* devices on this bus will ultimately end up.
-			* FORTUNATELY, it turns out it is harmless to
-			* send the bus_create to both of them.  We can
-			* narrow things down a little bit, though,
-			* because we know: - BusDev_Server can handle
-			* either server or client devices
-			* - BusDev_Client can handle ONLY client
-			* devices */
-			if (busdev_server_notifiers.bus_create) {
-				(*busdev_server_notifiers.bus_create) (bus_no);
-				notified = true;
-			}
-			if ((!bus_info->flags.server) /*client */ &&
-			    busdev_client_notifiers.bus_create) {
-				(*busdev_client_notifiers.bus_create) (bus_no);
-				notified = true;
-			}
-			break;
-		case CONTROLVM_BUS_DESTROY:
-			if (busdev_server_notifiers.bus_destroy) {
-				(*busdev_server_notifiers.bus_destroy) (bus_no);
-				notified = true;
-			}
-			if ((!bus_info->flags.server) /*client */ &&
-			    busdev_client_notifiers.bus_destroy) {
-				(*busdev_client_notifiers.bus_destroy) (bus_no);
-				notified = true;
-			}
-			break;
-		}
-	}
-	if (notified)
-		/* The callback function just called above is responsible
-		 * for calling the appropriate visorchipset_busdev_responders
-		 * function, which will call bus_responder()
-		 */
-		;
-	else
-		bus_responder(cmd, bus_no, response);
-	up(&notifier_lock);
-}
-
-static void
-device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd,
-	      struct controlvm_message_header *msg_hdr, int response,
-	      bool need_response, bool for_visorbus)
-{
-	struct visorchipset_busdev_notifiers *notifiers;
-	bool notified = false;
-
-	struct visorchipset_device_info *dev_info =
-		device_find(&dev_info_list, bus_no, dev_no);
-	char *envp[] = {
-		"SPARSP_DIAGPOOL_PAUSED_STATE = 1",
-		NULL
-	};
-
-	if (!dev_info)
-		return;
-
-	if (for_visorbus)
-		notifiers = &busdev_server_notifiers;
-	else
-		notifiers = &busdev_client_notifiers;
-	if (need_response) {
-		memcpy(&dev_info->pending_msg_hdr, msg_hdr,
-		       sizeof(struct controlvm_message_header));
-	} else {
-		dev_info->pending_msg_hdr.id = CONTROLVM_INVALID;
-	}
-
-	down(&notifier_lock);
-	if (response >= 0) {
-		switch (cmd) {
-		case CONTROLVM_DEVICE_CREATE:
-			if (notifiers->device_create) {
-				(*notifiers->device_create) (bus_no, dev_no);
-				notified = true;
-			}
-			break;
-		case CONTROLVM_DEVICE_CHANGESTATE:
-			/* ServerReady / ServerRunning / SegmentStateRunning */
-			if (state.alive == segment_state_running.alive &&
-			    state.operating ==
-				segment_state_running.operating) {
-				if (notifiers->device_resume) {
-					(*notifiers->device_resume) (bus_no,
-								     dev_no);
-					notified = true;
-				}
-			}
-			/* ServerNotReady / ServerLost / SegmentStateStandby */
-			else if (state.alive == segment_state_standby.alive &&
-				 state.operating ==
-				 segment_state_standby.operating) {
-				/* technically this is standby case
-				 * where server is lost
-				 */
-				if (notifiers->device_pause) {
-					(*notifiers->device_pause) (bus_no,
-								    dev_no);
-					notified = true;
-				}
-			} else if (state.alive == segment_state_paused.alive &&
-				   state.operating ==
-				   segment_state_paused.operating) {
-				/* this is lite pause where channel is
-				 * still valid just 'pause' of it
-				 */
-				if (bus_no == g_diagpool_bus_no &&
-				    dev_no == g_diagpool_dev_no) {
-					/* this will trigger the
-					 * diag_shutdown.sh script in
-					 * the visorchipset hotplug */
-					kobject_uevent_env
-					    (&visorchipset_platform_device.dev.
-					     kobj, KOBJ_ONLINE, envp);
-				}
-			}
-			break;
-		case CONTROLVM_DEVICE_DESTROY:
-			if (notifiers->device_destroy) {
-				(*notifiers->device_destroy) (bus_no, dev_no);
-				notified = true;
-			}
-			break;
-		}
-	}
-	if (notified)
-		/* The callback function just called above is responsible
-		 * for calling the appropriate visorchipset_busdev_responders
-		 * function, which will call device_responder()
-		 */
-		;
-	else
-		device_responder(cmd, bus_no, dev_no, response);
-	up(&notifier_lock);
-}
-
-static void
-bus_create(struct controlvm_message *inmsg)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no = cmd->create_bus.bus_no;
-	int rc = CONTROLVM_RESP_SUCCESS;
-	struct visorchipset_bus_info *bus_info;
-
-	bus_info = bus_find(&bus_info_list, bus_no);
-	if (bus_info && (bus_info->state.created == 1)) {
-		POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
-		goto cleanup;
-	}
-	bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL);
-	if (!bus_info) {
-		POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
-		goto cleanup;
-	}
-
-	INIT_LIST_HEAD(&bus_info->entry);
-	bus_info->bus_no = bus_no;
-
-	POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO);
-
-	if (inmsg->hdr.flags.test_message == 1)
-		bus_info->chan_info.addr_type = ADDRTYPE_LOCALTEST;
-	else
-		bus_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL;
-
-	bus_info->flags.server = inmsg->hdr.flags.server;
-	bus_info->chan_info.channel_addr = cmd->create_bus.channel_addr;
-	bus_info->chan_info.n_channel_bytes = cmd->create_bus.channel_bytes;
-	bus_info->chan_info.channel_type_uuid =
-			cmd->create_bus.bus_data_type_uuid;
-	bus_info->chan_info.channel_inst_uuid = cmd->create_bus.bus_inst_uuid;
-
-	list_add(&bus_info->entry, &bus_info_list);
-
-	POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO);
-
-cleanup:
-	bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr,
-		   rc, inmsg->hdr.flags.response_expected == 1);
-}
-
-static void
-bus_destroy(struct controlvm_message *inmsg)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no = cmd->destroy_bus.bus_no;
-	struct visorchipset_bus_info *bus_info;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	bus_info = bus_find(&bus_info_list, bus_no);
-	if (!bus_info)
-		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-	else if (bus_info->state.created == 0)
-		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
-
-	bus_epilog(bus_no, CONTROLVM_BUS_DESTROY, &inmsg->hdr,
-		   rc, inmsg->hdr.flags.response_expected == 1);
-}
-
-static void
-bus_configure(struct controlvm_message *inmsg,
-	      struct parser_context *parser_ctx)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no;
-	struct visorchipset_bus_info *bus_info;
-	int rc = CONTROLVM_RESP_SUCCESS;
-	char s[99];
-
-	bus_no = cmd->configure_bus.bus_no;
-	POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no,
-			 POSTCODE_SEVERITY_INFO);
-
-	bus_info = bus_find(&bus_info_list, bus_no);
-	if (!bus_info) {
-		POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-	} else if (bus_info->state.created == 0) {
-		POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-	} else if (bus_info->pending_msg_hdr.id != CONTROLVM_INVALID) {
-		POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT;
-	} else {
-		bus_info->partition_handle = cmd->configure_bus.guest_handle;
-		bus_info->partition_uuid = parser_id_get(parser_ctx);
-		parser_param_start(parser_ctx, PARSERSTRING_NAME);
-		bus_info->name = parser_string_get(parser_ctx);
-
-		visorchannel_uuid_id(&bus_info->partition_uuid, s);
-		POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no,
-				 POSTCODE_SEVERITY_INFO);
-	}
-	bus_epilog(bus_no, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr,
-		   rc, inmsg->hdr.flags.response_expected == 1);
-}
-
-static void
-my_device_create(struct controlvm_message *inmsg)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no = cmd->create_device.bus_no;
-	u32 dev_no = cmd->create_device.dev_no;
-	struct visorchipset_device_info *dev_info;
-	struct visorchipset_bus_info *bus_info;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	dev_info = device_find(&dev_info_list, bus_no, dev_no);
-	if (dev_info && (dev_info->state.created == 1)) {
-		POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
-		goto cleanup;
-	}
-	bus_info = bus_find(&bus_info_list, bus_no);
-	if (!bus_info) {
-		POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-		goto cleanup;
-	}
-	if (bus_info->state.created == 0) {
-		POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-		goto cleanup;
-	}
-	dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
-	if (!dev_info) {
-		POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
-		goto cleanup;
-	}
-
-	INIT_LIST_HEAD(&dev_info->entry);
-	dev_info->bus_no = bus_no;
-	dev_info->dev_no = dev_no;
-	dev_info->dev_inst_uuid = cmd->create_device.dev_inst_uuid;
-	POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no,
-			 POSTCODE_SEVERITY_INFO);
-
-	if (inmsg->hdr.flags.test_message == 1)
-		dev_info->chan_info.addr_type = ADDRTYPE_LOCALTEST;
-	else
-		dev_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL;
-	dev_info->chan_info.channel_addr = cmd->create_device.channel_addr;
-	dev_info->chan_info.n_channel_bytes = cmd->create_device.channel_bytes;
-	dev_info->chan_info.channel_type_uuid =
-			cmd->create_device.data_type_uuid;
-	dev_info->chan_info.intr = cmd->create_device.intr;
-	list_add(&dev_info->entry, &dev_info_list);
-	POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no,
-			 POSTCODE_SEVERITY_INFO);
-cleanup:
-	/* get the bus and devNo for DiagPool channel */
-	if (dev_info &&
-	    is_diagpool_channel(dev_info->chan_info.channel_type_uuid)) {
-		g_diagpool_bus_no = bus_no;
-		g_diagpool_dev_no = dev_no;
-	}
-	device_epilog(bus_no, dev_no, segment_state_running,
-		      CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc,
-		      inmsg->hdr.flags.response_expected == 1,
-		      FOR_VISORBUS(dev_info->chan_info.channel_type_uuid));
-}
-
-static void
-my_device_changestate(struct controlvm_message *inmsg)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no = cmd->device_change_state.bus_no;
-	u32 dev_no = cmd->device_change_state.dev_no;
-	struct spar_segment_state state = cmd->device_change_state.state;
-	struct visorchipset_device_info *dev_info;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	dev_info = device_find(&dev_info_list, bus_no, dev_no);
-	if (!dev_info) {
-		POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
-	} else if (dev_info->state.created == 0) {
-		POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no,
-				 POSTCODE_SEVERITY_ERR);
-		rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
-	}
-	if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info)
-		device_epilog(bus_no, dev_no, state,
-			      CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc,
-			      inmsg->hdr.flags.response_expected == 1,
-			      FOR_VISORBUS(
-					dev_info->chan_info.channel_type_uuid));
-}
-
-static void
-my_device_destroy(struct controlvm_message *inmsg)
-{
-	struct controlvm_message_packet *cmd = &inmsg->cmd;
-	u32 bus_no = cmd->destroy_device.bus_no;
-	u32 dev_no = cmd->destroy_device.dev_no;
-	struct visorchipset_device_info *dev_info;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	dev_info = device_find(&dev_info_list, bus_no, dev_no);
-	if (!dev_info)
-		rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID;
-	else if (dev_info->state.created == 0)
-		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
-
-	if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info)
-		device_epilog(bus_no, dev_no, segment_state_running,
-			      CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc,
-			      inmsg->hdr.flags.response_expected == 1,
-			      FOR_VISORBUS(
-					dev_info->chan_info.channel_type_uuid));
-}
-
-/* When provided with the physical address of the controlvm channel
- * (phys_addr), the offset to the payload area we need to manage
- * (offset), and the size of this payload area (bytes), fills in the
- * controlvm_payload_info struct.  Returns true for success or false
- * for failure.
- */
-static int
-initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes,
-				  struct visor_controlvm_payload_info *info)
-{
-	u8 __iomem *payload = NULL;
-	int rc = CONTROLVM_RESP_SUCCESS;
-
-	if (!info) {
-		rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID;
-		goto cleanup;
-	}
-	memset(info, 0, sizeof(struct visor_controlvm_payload_info));
-	if ((offset == 0) || (bytes == 0)) {
-		rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID;
-		goto cleanup;
-	}
-	payload = ioremap_cache(phys_addr + offset, bytes);
-	if (!payload) {
-		rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED;
-		goto cleanup;
-	}
-
-	info->offset = offset;
-	info->bytes = bytes;
-	info->ptr = payload;
-
-cleanup:
-	if (rc < 0) {
-		if (payload) {
-			iounmap(payload);
-			payload = NULL;
-		}
-	}
-	return rc;
-}
-
-static void
-destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info)
-{
-	if (info->ptr) {
-		iounmap(info->ptr);
-		info->ptr = NULL;
-	}
-	memset(info, 0, sizeof(struct visor_controlvm_payload_info));
-}
-
-static void
-initialize_controlvm_payload(void)
-{
-	HOSTADDRESS phys_addr = visorchannel_get_physaddr(controlvm_channel);
-	u64 payload_offset = 0;
-	u32 payload_bytes = 0;
-
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       request_payload_offset),
-			      &payload_offset, sizeof(payload_offset)) < 0) {
-		POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       request_payload_bytes),
-			      &payload_bytes, sizeof(payload_bytes)) < 0) {
-		POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-	initialize_controlvm_payload_info(phys_addr,
-					  payload_offset, payload_bytes,
-					  &controlvm_payload_info);
-}
-
-/*  Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset.
- *  Returns CONTROLVM_RESP_xxx code.
- */
-int
-visorchipset_chipset_ready(void)
-{
-	kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE);
-	return CONTROLVM_RESP_SUCCESS;
-}
-EXPORT_SYMBOL_GPL(visorchipset_chipset_ready);
-
-int
-visorchipset_chipset_selftest(void)
-{
-	char env_selftest[20];
-	char *envp[] = { env_selftest, NULL };
-
-	sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1);
-	kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE,
-			   envp);
-	return CONTROLVM_RESP_SUCCESS;
-}
-EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest);
-
-/*  Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset.
- *  Returns CONTROLVM_RESP_xxx code.
- */
-int
-visorchipset_chipset_notready(void)
-{
-	kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE);
-	return CONTROLVM_RESP_SUCCESS;
-}
-EXPORT_SYMBOL_GPL(visorchipset_chipset_notready);
-
-static void
-chipset_ready(struct controlvm_message_header *msg_hdr)
-{
-	int rc = visorchipset_chipset_ready();
-
-	if (rc != CONTROLVM_RESP_SUCCESS)
-		rc = -rc;
-	if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready)
-		controlvm_respond(msg_hdr, rc);
-	if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) {
-		/* Send CHIPSET_READY response when all modules have been loaded
-		 * and disks mounted for the partition
-		 */
-		g_chipset_msg_hdr = *msg_hdr;
-	}
-}
-
-static void
-chipset_selftest(struct controlvm_message_header *msg_hdr)
-{
-	int rc = visorchipset_chipset_selftest();
-
-	if (rc != CONTROLVM_RESP_SUCCESS)
-		rc = -rc;
-	if (msg_hdr->flags.response_expected)
-		controlvm_respond(msg_hdr, rc);
-}
-
-static void
-chipset_notready(struct controlvm_message_header *msg_hdr)
-{
-	int rc = visorchipset_chipset_notready();
-
-	if (rc != CONTROLVM_RESP_SUCCESS)
-		rc = -rc;
-	if (msg_hdr->flags.response_expected)
-		controlvm_respond(msg_hdr, rc);
-}
-
-/* This is your "one-stop" shop for grabbing the next message from the
- * CONTROLVM_QUEUE_EVENT queue in the controlvm channel.
- */
-static bool
-read_controlvm_event(struct controlvm_message *msg)
-{
-	if (visorchannel_signalremove(controlvm_channel,
-				      CONTROLVM_QUEUE_EVENT, msg)) {
-		/* got a message */
-		if (msg->hdr.flags.test_message == 1)
-			return false;
-		return true;
-	}
-	return false;
-}
-
-/*
- * The general parahotplug flow works as follows.  The visorchipset
- * driver receives a DEVICE_CHANGESTATE message from Command
- * specifying a physical device to enable or disable.  The CONTROLVM
- * message handler calls parahotplug_process_message, which then adds
- * the message to a global list and kicks off a udev event which
- * causes a user level script to enable or disable the specified
- * device.  The udev script then writes to
- * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write
- * to get called, at which point the appropriate CONTROLVM message is
- * retrieved from the list and responded to.
- */
-
-#define PARAHOTPLUG_TIMEOUT_MS 2000
-
-/*
- * Generate unique int to match an outstanding CONTROLVM message with a
- * udev script /proc response
- */
-static int
-parahotplug_next_id(void)
-{
-	static atomic_t id = ATOMIC_INIT(0);
-
-	return atomic_inc_return(&id);
-}
-
-/*
- * Returns the time (in jiffies) when a CONTROLVM message on the list
- * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future
- */
-static unsigned long
-parahotplug_next_expiration(void)
-{
-	return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS);
-}
-
-/*
- * Create a parahotplug_request, which is basically a wrapper for a
- * CONTROLVM_MESSAGE that we can stick on a list
- */
-static struct parahotplug_request *
-parahotplug_request_create(struct controlvm_message *msg)
-{
-	struct parahotplug_request *req;
-
-	req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY);
-	if (!req)
-		return NULL;
-
-	req->id = parahotplug_next_id();
-	req->expiration = parahotplug_next_expiration();
-	req->msg = *msg;
-
-	return req;
-}
-
-/*
- * Free a parahotplug_request.
- */
-static void
-parahotplug_request_destroy(struct parahotplug_request *req)
-{
-	kfree(req);
-}
-
-/*
- * Cause uevent to run the user level script to do the disable/enable
- * specified in (the CONTROLVM message in) the specified
- * parahotplug_request
- */
-static void
-parahotplug_request_kickoff(struct parahotplug_request *req)
-{
-	struct controlvm_message_packet *cmd = &req->msg.cmd;
-	char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40],
-	    env_func[40];
-	char *envp[] = {
-		env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL
-	};
-
-	sprintf(env_cmd, "SPAR_PARAHOTPLUG=1");
-	sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id);
-	sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d",
-		cmd->device_change_state.state.active);
-	sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d",
-		cmd->device_change_state.bus_no);
-	sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d",
-		cmd->device_change_state.dev_no >> 3);
-	sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d",
-		cmd->device_change_state.dev_no & 0x7);
-
-	kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE,
-			   envp);
-}
-
-/*
- * Remove any request from the list that's been on there too long and
- * respond with an error.
- */
-static void
-parahotplug_process_list(void)
-{
-	struct list_head *pos;
-	struct list_head *tmp;
-
-	spin_lock(&parahotplug_request_list_lock);
-
-	list_for_each_safe(pos, tmp, &parahotplug_request_list) {
-		struct parahotplug_request *req =
-		    list_entry(pos, struct parahotplug_request, list);
-
-		if (!time_after_eq(jiffies, req->expiration))
-			continue;
-
-		list_del(pos);
-		if (req->msg.hdr.flags.response_expected)
-			controlvm_respond_physdev_changestate(
-				&req->msg.hdr,
-				CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT,
-				req->msg.cmd.device_change_state.state);
-		parahotplug_request_destroy(req);
-	}
-
-	spin_unlock(&parahotplug_request_list_lock);
-}
-
-/*
- * Called from the /proc handler, which means the user script has
- * finished the enable/disable.  Find the matching identifier, and
- * respond to the CONTROLVM message with success.
- */
-static int
-parahotplug_request_complete(int id, u16 active)
-{
-	struct list_head *pos;
-	struct list_head *tmp;
-
-	spin_lock(&parahotplug_request_list_lock);
-
-	/* Look for a request matching "id". */
-	list_for_each_safe(pos, tmp, &parahotplug_request_list) {
-		struct parahotplug_request *req =
-		    list_entry(pos, struct parahotplug_request, list);
-		if (req->id == id) {
-			/* Found a match.  Remove it from the list and
-			 * respond.
-			 */
-			list_del(pos);
-			spin_unlock(&parahotplug_request_list_lock);
-			req->msg.cmd.device_change_state.state.active = active;
-			if (req->msg.hdr.flags.response_expected)
-				controlvm_respond_physdev_changestate(
-					&req->msg.hdr, CONTROLVM_RESP_SUCCESS,
-					req->msg.cmd.device_change_state.state);
-			parahotplug_request_destroy(req);
-			return 0;
-		}
-	}
-
-	spin_unlock(&parahotplug_request_list_lock);
-	return -1;
-}
-
-/*
- * Enables or disables a PCI device by kicking off a udev script
- */
-static void
-parahotplug_process_message(struct controlvm_message *inmsg)
-{
-	struct parahotplug_request *req;
-
-	req = parahotplug_request_create(inmsg);
-
-	if (!req)
-		return;
-
-	if (inmsg->cmd.device_change_state.state.active) {
-		/* For enable messages, just respond with success
-		* right away.  This is a bit of a hack, but there are
-		* issues with the early enable messages we get (with
-		* either the udev script not detecting that the device
-		* is up, or not getting called at all).  Fortunately
-		* the messages that get lost don't matter anyway, as
-		* devices are automatically enabled at
-		* initialization.
-		*/
-		parahotplug_request_kickoff(req);
-		controlvm_respond_physdev_changestate(&inmsg->hdr,
-			CONTROLVM_RESP_SUCCESS,
-			inmsg->cmd.device_change_state.state);
-		parahotplug_request_destroy(req);
-	} else {
-		/* For disable messages, add the request to the
-		* request list before kicking off the udev script.  It
-		* won't get responded to until the script has
-		* indicated it's done.
-		*/
-		spin_lock(&parahotplug_request_list_lock);
-		list_add_tail(&req->list, &parahotplug_request_list);
-		spin_unlock(&parahotplug_request_list_lock);
-
-		parahotplug_request_kickoff(req);
-	}
-}
-
-/* Process a controlvm message.
- * Return result:
- *    false - this function will return FALSE only in the case where the
- *            controlvm message was NOT processed, but processing must be
- *            retried before reading the next controlvm message; a
- *            scenario where this can occur is when we need to throttle
- *            the allocation of memory in which to copy out controlvm
- *            payload data
- *    true  - processing of the controlvm message completed,
- *            either successfully or with an error.
- */
-static bool
-handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr)
-{
-	struct controlvm_message_packet *cmd = &inmsg.cmd;
-	u64 parm_addr;
-	u32 parm_bytes;
-	struct parser_context *parser_ctx = NULL;
-	bool local_addr;
-	struct controlvm_message ackmsg;
-
-	/* create parsing context if necessary */
-	local_addr = (inmsg.hdr.flags.test_message == 1);
-	if (channel_addr == 0)
-		return true;
-	parm_addr = channel_addr + inmsg.hdr.payload_vm_offset;
-	parm_bytes = inmsg.hdr.payload_bytes;
-
-	/* Parameter and channel addresses within test messages actually lie
-	 * within our OS-controlled memory.  We need to know that, because it
-	 * makes a difference in how we compute the virtual address.
-	 */
-	if (parm_addr && parm_bytes) {
-		bool retry = false;
-
-		parser_ctx =
-		    parser_init_byte_stream(parm_addr, parm_bytes,
-					    local_addr, &retry);
-		if (!parser_ctx && retry)
-			return false;
-	}
-
-	if (!local_addr) {
-		controlvm_init_response(&ackmsg, &inmsg.hdr,
-					CONTROLVM_RESP_SUCCESS);
-		if (controlvm_channel)
-			visorchannel_signalinsert(controlvm_channel,
-						  CONTROLVM_QUEUE_ACK,
-						  &ackmsg);
-	}
-	switch (inmsg.hdr.id) {
-	case CONTROLVM_CHIPSET_INIT:
-		chipset_init(&inmsg);
-		break;
-	case CONTROLVM_BUS_CREATE:
-		bus_create(&inmsg);
-		break;
-	case CONTROLVM_BUS_DESTROY:
-		bus_destroy(&inmsg);
-		break;
-	case CONTROLVM_BUS_CONFIGURE:
-		bus_configure(&inmsg, parser_ctx);
-		break;
-	case CONTROLVM_DEVICE_CREATE:
-		my_device_create(&inmsg);
-		break;
-	case CONTROLVM_DEVICE_CHANGESTATE:
-		if (cmd->device_change_state.flags.phys_device) {
-			parahotplug_process_message(&inmsg);
-		} else {
-			/* save the hdr and cmd structures for later use */
-			/* when sending back the response to Command */
-			my_device_changestate(&inmsg);
-			g_devicechangestate_packet = inmsg.cmd;
-			break;
-		}
-		break;
-	case CONTROLVM_DEVICE_DESTROY:
-		my_device_destroy(&inmsg);
-		break;
-	case CONTROLVM_DEVICE_CONFIGURE:
-		/* no op for now, just send a respond that we passed */
-		if (inmsg.hdr.flags.response_expected)
-			controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS);
-		break;
-	case CONTROLVM_CHIPSET_READY:
-		chipset_ready(&inmsg.hdr);
-		break;
-	case CONTROLVM_CHIPSET_SELFTEST:
-		chipset_selftest(&inmsg.hdr);
-		break;
-	case CONTROLVM_CHIPSET_STOP:
-		chipset_notready(&inmsg.hdr);
-		break;
-	default:
-		if (inmsg.hdr.flags.response_expected)
-			controlvm_respond(&inmsg.hdr,
-				-CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN);
-		break;
-	}
-
-	if (parser_ctx) {
-		parser_done(parser_ctx);
-		parser_ctx = NULL;
-	}
-	return true;
-}
-
-static HOSTADDRESS controlvm_get_channel_address(void)
-{
-	u64 addr = 0;
-	u32 size = 0;
-
-	if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size)))
-		return 0;
-
-	return addr;
-}
-
-static void
-controlvm_periodic_work(struct work_struct *work)
-{
-	struct controlvm_message inmsg;
-	bool got_command = false;
-	bool handle_command_failed = false;
-	static u64 poll_count;
-
-	/* make sure visorbus server is registered for controlvm callbacks */
-	if (visorchipset_serverregwait && !serverregistered)
-		goto cleanup;
-	/* make sure visorclientbus server is regsitered for controlvm
-	 * callbacks
-	 */
-	if (visorchipset_clientregwait && !clientregistered)
-		goto cleanup;
-
-	poll_count++;
-	if (poll_count >= 250)
-		;	/* keep going */
-	else
-		goto cleanup;
-
-	/* Check events to determine if response to CHIPSET_READY
-	 * should be sent
-	 */
-	if (visorchipset_holdchipsetready &&
-	    (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) {
-		if (check_chipset_events() == 1) {
-			controlvm_respond(&g_chipset_msg_hdr, 0);
-			clear_chipset_events();
-			memset(&g_chipset_msg_hdr, 0,
-			       sizeof(struct controlvm_message_header));
-		}
-	}
-
-	while (visorchannel_signalremove(controlvm_channel,
-					 CONTROLVM_QUEUE_RESPONSE,
-					 &inmsg))
-		;
-	if (!got_command) {
-		if (controlvm_pending_msg_valid) {
-			/* we throttled processing of a prior
-			* msg, so try to process it again
-			* rather than reading a new one
-			*/
-			inmsg = controlvm_pending_msg;
-			controlvm_pending_msg_valid = false;
-			got_command = true;
-		} else {
-			got_command = read_controlvm_event(&inmsg);
-		}
-	}
-
-	handle_command_failed = false;
-	while (got_command && (!handle_command_failed)) {
-		most_recent_message_jiffies = jiffies;
-		if (handle_command(inmsg,
-				   visorchannel_get_physaddr
-				   (controlvm_channel)))
-			got_command = read_controlvm_event(&inmsg);
-		else {
-			/* this is a scenario where throttling
-			* is required, but probably NOT an
-			* error...; we stash the current
-			* controlvm msg so we will attempt to
-			* reprocess it on our next loop
-			*/
-			handle_command_failed = true;
-			controlvm_pending_msg = inmsg;
-			controlvm_pending_msg_valid = true;
-		}
-	}
-
-	/* parahotplug_worker */
-	parahotplug_process_list();
-
-cleanup:
-
-	if (time_after(jiffies,
-		       most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) {
-		/* it's been longer than MIN_IDLE_SECONDS since we
-		* processed our last controlvm message; slow down the
-		* polling
-		*/
-		if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW)
-			poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW;
-	} else {
-		if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST)
-			poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
-	}
-
-	queue_delayed_work(periodic_controlvm_workqueue,
-			   &periodic_controlvm_work, poll_jiffies);
-}
-
-static void
-setup_crash_devices_work_queue(struct work_struct *work)
-{
-	struct controlvm_message local_crash_bus_msg;
-	struct controlvm_message local_crash_dev_msg;
-	struct controlvm_message msg;
-	u32 local_crash_msg_offset;
-	u16 local_crash_msg_count;
-
-	/* make sure visorbus server is registered for controlvm callbacks */
-	if (visorchipset_serverregwait && !serverregistered)
-		goto cleanup;
-
-	/* make sure visorclientbus server is regsitered for controlvm
-	 * callbacks
-	 */
-	if (visorchipset_clientregwait && !clientregistered)
-		goto cleanup;
-
-	POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO);
-
-	/* send init chipset msg */
-	msg.hdr.id = CONTROLVM_CHIPSET_INIT;
-	msg.cmd.init_chipset.bus_count = 23;
-	msg.cmd.init_chipset.switch_count = 0;
-
-	chipset_init(&msg);
-
-	/* get saved message count */
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       saved_crash_message_count),
-			      &local_crash_msg_count, sizeof(u16)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) {
-		POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC,
-				 local_crash_msg_count,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* get saved crash message offset */
-	if (visorchannel_read(controlvm_channel,
-			      offsetof(struct spar_controlvm_channel_protocol,
-				       saved_crash_message_offset),
-			      &local_crash_msg_offset, sizeof(u32)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* read create device message for storage bus offset */
-	if (visorchannel_read(controlvm_channel,
-			      local_crash_msg_offset,
-			      &local_crash_bus_msg,
-			      sizeof(struct controlvm_message)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* read create device message for storage device */
-	if (visorchannel_read(controlvm_channel,
-			      local_crash_msg_offset +
-			      sizeof(struct controlvm_message),
-			      &local_crash_dev_msg,
-			      sizeof(struct controlvm_message)) < 0) {
-		POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* reuse IOVM create bus message */
-	if (local_crash_bus_msg.cmd.create_bus.channel_addr) {
-		bus_create(&local_crash_bus_msg);
-	} else {
-		POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-
-	/* reuse create device message for storage device */
-	if (local_crash_dev_msg.cmd.create_device.channel_addr) {
-		my_device_create(&local_crash_dev_msg);
-	} else {
-		POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC,
-				 POSTCODE_SEVERITY_ERR);
-		return;
-	}
-	POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO);
-	return;
-
-cleanup:
-
-	poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW;
-
-	queue_delayed_work(periodic_controlvm_workqueue,
-			   &periodic_controlvm_work, poll_jiffies);
-}
-
-static void
-bus_create_response(u32 bus_no, int response)
-{
-	bus_responder(CONTROLVM_BUS_CREATE, bus_no, response);
-}
-
-static void
-bus_destroy_response(u32 bus_no, int response)
-{
-	bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response);
-}
-
-static void
-device_create_response(u32 bus_no, u32 dev_no, int response)
-{
-	device_responder(CONTROLVM_DEVICE_CREATE, bus_no, dev_no, response);
-}
-
-static void
-device_destroy_response(u32 bus_no, u32 dev_no, int response)
-{
-	device_responder(CONTROLVM_DEVICE_DESTROY, bus_no, dev_no, response);
-}
-
-void
-visorchipset_device_pause_response(u32 bus_no, u32 dev_no, int response)
-{
-	device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE,
-				     bus_no, dev_no, response,
-				     segment_state_standby);
-}
-EXPORT_SYMBOL_GPL(visorchipset_device_pause_response);
-
-static void
-device_resume_response(u32 bus_no, u32 dev_no, int response)
-{
-	device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE,
-				     bus_no, dev_no, response,
-				     segment_state_running);
-}
-
-bool
-visorchipset_get_bus_info(u32 bus_no, struct visorchipset_bus_info *bus_info)
-{
-	void *p = bus_find(&bus_info_list, bus_no);
-
-	if (!p)
-		return false;
-	memcpy(bus_info, p, sizeof(struct visorchipset_bus_info));
-	return true;
-}
-EXPORT_SYMBOL_GPL(visorchipset_get_bus_info);
-
-bool
-visorchipset_set_bus_context(u32 bus_no, void *context)
-{
-	struct visorchipset_bus_info *p = bus_find(&bus_info_list, bus_no);
-
-	if (!p)
-		return false;
-	p->bus_driver_context = context;
-	return true;
-}
-EXPORT_SYMBOL_GPL(visorchipset_set_bus_context);
-
-bool
-visorchipset_get_device_info(u32 bus_no, u32 dev_no,
-			     struct visorchipset_device_info *dev_info)
-{
-	void *p = device_find(&dev_info_list, bus_no, dev_no);
-
-	if (!p)
-		return false;
-	memcpy(dev_info, p, sizeof(struct visorchipset_device_info));
-	return true;
-}
-EXPORT_SYMBOL_GPL(visorchipset_get_device_info);
-
-bool
-visorchipset_set_device_context(u32 bus_no, u32 dev_no, void *context)
-{
-	struct visorchipset_device_info *p;
-
-	p = device_find(&dev_info_list, bus_no, dev_no);
-
-	if (!p)
-		return false;
-	p->bus_driver_context = context;
-	return true;
-}
-EXPORT_SYMBOL_GPL(visorchipset_set_device_context);
-
-/* Generic wrapper function for allocating memory from a kmem_cache pool.
- */
-void *
-visorchipset_cache_alloc(struct kmem_cache *pool, bool ok_to_block,
-			 char *fn, int ln)
-{
-	gfp_t gfp;
-	void *p;
-
-	if (ok_to_block)
-		gfp = GFP_KERNEL;
-	else
-		gfp = GFP_ATOMIC;
-	/* __GFP_NORETRY means "ok to fail", meaning
-	 * kmem_cache_alloc() can return NULL, implying the caller CAN
-	 * cope with failure.  If you do NOT specify __GFP_NORETRY,
-	 * Linux will go to extreme measures to get memory for you
-	 * (like, invoke oom killer), which will probably cripple the
-	 * system.
-	 */
-	gfp |= __GFP_NORETRY;
-	p = kmem_cache_alloc(pool, gfp);
-	if (!p)
-		return NULL;
-
-	return p;
-}
-
-/* Generic wrapper function for freeing memory from a kmem_cache pool.
- */
-void
-visorchipset_cache_free(struct kmem_cache *pool, void *p, char *fn, int ln)
-{
-	if (!p)
-		return;
-
-	kmem_cache_free(pool, p);
-}
-
-static ssize_t chipsetready_store(struct device *dev,
-				  struct device_attribute *attr,
-				  const char *buf, size_t count)
-{
-	char msgtype[64];
-
-	if (sscanf(buf, "%63s", msgtype) != 1)
-		return -EINVAL;
-
-	if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) {
-		chipset_events[0] = 1;
-		return count;
-	} else if (!strcmp(msgtype, "MODULES_LOADED")) {
-		chipset_events[1] = 1;
-		return count;
-	}
-	return -EINVAL;
-}
-
-/* The parahotplug/devicedisabled interface gets called by our support script
- * when an SR-IOV device has been shut down. The ID is passed to the script
- * and then passed back when the device has been removed.
- */
-static ssize_t devicedisabled_store(struct device *dev,
-				    struct device_attribute *attr,
-				    const char *buf, size_t count)
-{
-	unsigned int id;
-
-	if (kstrtouint(buf, 10, &id))
-		return -EINVAL;
-
-	parahotplug_request_complete(id, 0);
-	return count;
-}
-
-/* The parahotplug/deviceenabled interface gets called by our support script
- * when an SR-IOV device has been recovered. The ID is passed to the script
- * and then passed back when the device has been brought back up.
- */
-static ssize_t deviceenabled_store(struct device *dev,
-				   struct device_attribute *attr,
-				   const char *buf, size_t count)
-{
-	unsigned int id;
-
-	if (kstrtouint(buf, 10, &id))
-		return -EINVAL;
-
-	parahotplug_request_complete(id, 1);
-	return count;
-}
-
-static int
-visorchipset_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	unsigned long physaddr = 0;
-	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
-	GUEST_PHYSICAL_ADDRESS addr = 0;
-
-	/* sv_enable_dfp(); */
-	if (offset & (PAGE_SIZE - 1))
-		return -ENXIO;	/* need aligned offsets */
-
-	switch (offset) {
-	case VISORCHIPSET_MMAP_CONTROLCHANOFFSET:
-		vma->vm_flags |= VM_IO;
-		if (!*file_controlvm_channel)
-			return -ENXIO;
-
-		visorchannel_read(*file_controlvm_channel,
-			offsetof(struct spar_controlvm_channel_protocol,
-				 gp_control_channel),
-			&addr, sizeof(addr));
-		if (!addr)
-			return -ENXIO;
-
-		physaddr = (unsigned long)addr;
-		if (remap_pfn_range(vma, vma->vm_start,
-				    physaddr >> PAGE_SHIFT,
-				    vma->vm_end - vma->vm_start,
-				    /*pgprot_noncached */
-				    (vma->vm_page_prot))) {
-			return -EAGAIN;
-		}
-		break;
-	default:
-		return -ENXIO;
-	}
-	return 0;
-}
-
-static long visorchipset_ioctl(struct file *file, unsigned int cmd,
-			       unsigned long arg)
-{
-	s64 adjustment;
-	s64 vrtc_offset;
-
-	switch (cmd) {
-	case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET:
-		/* get the physical rtc offset */
-		vrtc_offset = issue_vmcall_query_guest_virtual_time_offset();
-		if (copy_to_user((void __user *)arg, &vrtc_offset,
-				 sizeof(vrtc_offset))) {
-			return -EFAULT;
-		}
-		return SUCCESS;
-	case VMCALL_UPDATE_PHYSICAL_TIME:
-		if (copy_from_user(&adjustment, (void __user *)arg,
-				   sizeof(adjustment))) {
-			return -EFAULT;
-		}
-		return issue_vmcall_update_physical_time(adjustment);
-	default:
-		return -EFAULT;
-	}
-}
-
-static const struct file_operations visorchipset_fops = {
-	.owner = THIS_MODULE,
-	.open = visorchipset_open,
-	.read = NULL,
-	.write = NULL,
-	.unlocked_ioctl = visorchipset_ioctl,
-	.release = visorchipset_release,
-	.mmap = visorchipset_mmap,
-};
-
-int
-visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
-{
-	int rc = 0;
-
-	file_controlvm_channel = controlvm_channel;
-	cdev_init(&file_cdev, &visorchipset_fops);
-	file_cdev.owner = THIS_MODULE;
-	if (MAJOR(major_dev) == 0) {
-		rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset");
-		/* dynamic major device number registration required */
-		if (rc < 0)
-			return rc;
-	} else {
-		/* static major device number registration required */
-		rc = register_chrdev_region(major_dev, 1, "visorchipset");
-		if (rc < 0)
-			return rc;
-	}
-	rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1);
-	if (rc < 0) {
-		unregister_chrdev_region(major_dev, 1);
-		return rc;
-	}
-	return 0;
-}
-
-
-
-static int __init
-visorchipset_init(void)
-{
-	int rc = 0, x = 0;
-	HOSTADDRESS addr;
-
-	if (!unisys_spar_platform)
-		return -ENODEV;
-
-	memset(&busdev_server_notifiers, 0, sizeof(busdev_server_notifiers));
-	memset(&busdev_client_notifiers, 0, sizeof(busdev_client_notifiers));
-	memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info));
-	memset(&livedump_info, 0, sizeof(livedump_info));
-	atomic_set(&livedump_info.buffers_in_use, 0);
-
-	if (visorchipset_testvnic) {
-		POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, x, DIAG_SEVERITY_ERR);
-		rc = x;
-		goto cleanup;
-	}
-
-	addr = controlvm_get_channel_address();
-	if (addr) {
-		controlvm_channel =
-		    visorchannel_create_with_lock
-		    (addr,
-		     sizeof(struct spar_controlvm_channel_protocol),
-		     spar_controlvm_channel_protocol_uuid);
-		if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT(
-				visorchannel_get_header(controlvm_channel))) {
-			initialize_controlvm_payload();
-		} else {
-			visorchannel_destroy(controlvm_channel);
-			controlvm_channel = NULL;
-			return -ENODEV;
-		}
-	} else {
-		return -ENODEV;
-	}
-
-	major_dev = MKDEV(visorchipset_major, 0);
-	rc = visorchipset_file_init(major_dev, &controlvm_channel);
-	if (rc < 0) {
-		POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR);
-		goto cleanup;
-	}
-
-	memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header));
-
-	if (!visorchipset_disable_controlvm) {
-		/* if booting in a crash kernel */
-		if (is_kdump_kernel())
-			INIT_DELAYED_WORK(&periodic_controlvm_work,
-					  setup_crash_devices_work_queue);
-		else
-			INIT_DELAYED_WORK(&periodic_controlvm_work,
-					  controlvm_periodic_work);
-		periodic_controlvm_workqueue =
-		    create_singlethread_workqueue("visorchipset_controlvm");
-
-		if (!periodic_controlvm_workqueue) {
-			POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC,
-					 DIAG_SEVERITY_ERR);
-			rc = -ENOMEM;
-			goto cleanup;
-		}
-		most_recent_message_jiffies = jiffies;
-		poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
-		rc = queue_delayed_work(periodic_controlvm_workqueue,
-					&periodic_controlvm_work, poll_jiffies);
-		if (rc < 0) {
-			POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC,
-					 DIAG_SEVERITY_ERR);
-			goto cleanup;
-		}
-	}
-
-	visorchipset_platform_device.dev.devt = major_dev;
-	if (platform_device_register(&visorchipset_platform_device) < 0) {
-		POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR);
-		rc = -1;
-		goto cleanup;
-	}
-	POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO);
-	rc = 0;
-cleanup:
-	if (rc) {
-		POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc,
-				 POSTCODE_SEVERITY_ERR);
-	}
-	return rc;
-}
-
-void
-visorchipset_file_cleanup(dev_t major_dev)
-{
-	if (file_cdev.ops)
-		cdev_del(&file_cdev);
-	file_cdev.ops = NULL;
-	unregister_chrdev_region(major_dev, 1);
-}
-
-static void
-visorchipset_exit(void)
-{
-	POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO);
-
-	if (visorchipset_disable_controlvm) {
-		;
-	} else {
-		cancel_delayed_work(&periodic_controlvm_work);
-		flush_workqueue(periodic_controlvm_workqueue);
-		destroy_workqueue(periodic_controlvm_workqueue);
-		periodic_controlvm_workqueue = NULL;
-		destroy_controlvm_payload_info(&controlvm_payload_info);
-	}
-
-	cleanup_controlvm_structures();
-
-	memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header));
-
-	visorchannel_destroy(controlvm_channel);
-
-	visorchipset_file_cleanup(visorchipset_platform_device.dev.devt);
-	POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO);
-}
-
-module_param_named(testvnic, visorchipset_testvnic, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_testvnic, "1 to test vnic, using dummy VNIC connected via a loopback to a physical ethernet");
-module_param_named(testvnicclient, visorchipset_testvnicclient, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_testvnicclient, "1 to test vnic, using real VNIC channel attached to a separate IOVM guest");
-module_param_named(testmsg, visorchipset_testmsg, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_testmsg,
-		 "1 to manufacture the chipset, bus, and switch messages");
-module_param_named(major, visorchipset_major, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_major,
-		 "major device number to use for the device node");
-module_param_named(serverregwait, visorchipset_serverregwait, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_serverreqwait,
-		 "1 to have the module wait for the visor bus to register");
-module_param_named(clientregwait, visorchipset_clientregwait, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_clientregwait, "1 to have the module wait for the visorclientbus to register");
-module_param_named(testteardown, visorchipset_testteardown, int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_testteardown,
-		 "1 to test teardown of the chipset, bus, and switch");
-module_param_named(disable_controlvm, visorchipset_disable_controlvm, int,
-		   S_IRUGO);
-MODULE_PARM_DESC(visorchipset_disable_controlvm,
-		 "1 to disable polling of controlVm channel");
-module_param_named(holdchipsetready, visorchipset_holdchipsetready,
-		   int, S_IRUGO);
-MODULE_PARM_DESC(visorchipset_holdchipsetready,
-		 "1 to hold response to CHIPSET_READY");
-
-module_init(visorchipset_init);
-module_exit(visorchipset_exit);
-
-MODULE_AUTHOR("Unisys");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver "
-		   VERSION);
-MODULE_VERSION(VERSION);