drivers/infiniband/hw/usnic/usnic_common_util.h

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  */
  18
  19 #ifndef USNIC_CMN_UTIL_H
  20 #define USNIC_CMN_UTIL_H
  21
  22 static inline void
  23 usnic_mac_to_gid(const char *const mac, char *raw_gid)
  24 {
  25         raw_gid[0] = 0xfe;
  26         raw_gid[1] = 0x80;
  27         memset(&raw_gid[2], 0, 6);
  28         raw_gid[8] = mac[0]^2;
  29         raw_gid[9] = mac[1];
  30         raw_gid[10] = mac[2];
  31         raw_gid[11] = 0xff;
  32         raw_gid[12] = 0xfe;
  33         raw_gid[13] = mac[3];
  34         raw_gid[14] = mac[4];
  35         raw_gid[15] = mac[5];
  36 }
  37
  38 static inline void
  39 usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid)
  40 {
  41         raw_gid[0] = 0xfe;
  42         raw_gid[1] = 0x80;
  43         memset(&raw_gid[2], 0, 2);
  44         memcpy(&raw_gid[4], &inaddr, 4);
  45         raw_gid[8] = mac[0]^2;
  46         raw_gid[9] = mac[1];
  47         raw_gid[10] = mac[2];
  48         raw_gid[11] = 0xff;
  49         raw_gid[12] = 0xfe;
  50         raw_gid[13] = mac[3];
  51         raw_gid[14] = mac[4];
  52         raw_gid[15] = mac[5];
  53 }
  54
  55 static inline void
  56 usnic_write_gid_if_id_from_mac(char *mac, char *raw_gid)
  57 {
  58         raw_gid[8] = mac[0]^2;
  59         raw_gid[9] = mac[1];
  60         raw_gid[10] = mac[2];
  61         raw_gid[11] = 0xff;
  62         raw_gid[12] = 0xfe;
  63         raw_gid[13] = mac[3];
  64         raw_gid[14] = mac[4];
  65         raw_gid[15] = mac[5];
  66 }
  67
  68 #endif /* USNIC_COMMON_UTIL_H */