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/* uisutils.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 <linux/string.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uuid.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include "uisutils.h"
#include "version.h"
#include "vbushelper.h"
#include <linux/skbuff.h>
#ifdef CONFIG_HIGHMEM
#include <linux/highmem.h>
#endif
/* this is shorter than using __FILE__ (full path name) in
* debug/info/error messages
*/
#define CURRENT_FILE_PC UISLIB_PC_uisutils_c
#define __MYFILE__ "uisutils.c"
/* exports */
atomic_t uisutils_registered_services = ATOMIC_INIT(0);
/* num registrations via
* uisctrl_register_req_handler() or
* uisctrl_register_req_handler_ex() */
/*****************************************************/
/* Utility functions */
/*****************************************************/
int
uisutil_add_proc_line_ex(int *total, char **buffer, int *buffer_remaining,
char *format, ...)
{
va_list args;
int len;
va_start(args, format);
len = vsnprintf(*buffer, *buffer_remaining, format, args);
va_end(args);
if (len >= *buffer_remaining) {
*buffer += *buffer_remaining;
*total += *buffer_remaining;
*buffer_remaining = 0;
return -1;
}
*buffer_remaining -= len;
*buffer += len;
*total += len;
return len;
}
EXPORT_SYMBOL_GPL(uisutil_add_proc_line_ex);
int
uisctrl_register_req_handler(int type, void *fptr,
struct ultra_vbus_deviceinfo *chipset_driver_info)
{
switch (type) {
case 2:
if (fptr) {
if (!virt_control_chan_func)
atomic_inc(&uisutils_registered_services);
virt_control_chan_func = fptr;
} else {
if (virt_control_chan_func)
atomic_dec(&uisutils_registered_services);
virt_control_chan_func = NULL;
}
break;
default:
return 0;
}
if (chipset_driver_info)
bus_device_info_init(chipset_driver_info, "chipset", "uislib",
VERSION, NULL);
return 1;
}
EXPORT_SYMBOL_GPL(uisctrl_register_req_handler);
/*
* unsigned int uisutil_copy_fragsinfo_from_skb(unsigned char *calling_ctx,
* void *skb_in,
* unsigned int firstfraglen,
* unsigned int frags_max,
* struct phys_info frags[])
*
* calling_ctx - input - a string that is displayed to show
* who called * this func
* void *skb_in - skb whose frag info we're copying type is hidden so we
* don't need to include skbbuff in uisutils.h which is
* included in non-networking code.
* unsigned int firstfraglen - input - length of first fragment in skb
* unsigned int frags_max - input - max len of frags array
* struct phys_info frags[] - output - frags array filled in on output
* return value indicates number of
* entries filled in frags
*/
static LIST_HEAD(req_handler_info_list); /* list of struct req_handler_info */
static DEFINE_SPINLOCK(req_handler_info_list_lock);
struct req_handler_info *
req_handler_find(uuid_le switch_uuid)
{
struct list_head *lelt, *tmp;
struct req_handler_info *entry = NULL;
spin_lock(&req_handler_info_list_lock);
list_for_each_safe(lelt, tmp, &req_handler_info_list) {
entry = list_entry(lelt, struct req_handler_info, list_link);
if (uuid_le_cmp(entry->switch_uuid, switch_uuid) == 0) {
spin_unlock(&req_handler_info_list_lock);
return entry;
}
}
spin_unlock(&req_handler_info_list_lock);
return NULL;
}
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