| /* 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; |
| } |