drivers/firewire/fw-topology.h

   1 /*
   2  * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #ifndef __fw_topology_h
  20 #define __fw_topology_h
  21
  22 enum {
  23         FW_NODE_CREATED =   0x00,
  24         FW_NODE_UPDATED =   0x01,
  25         FW_NODE_DESTROYED = 0x02,
  26         FW_NODE_LINK_ON =   0x03,
  27         FW_NODE_LINK_OFF =  0x04,
  28 };
  29
  30 struct fw_node {
  31         u16 node_id;
  32         u8 color;
  33         u8 port_count;
  34         u8 link_on : 1;
  35         u8 initiated_reset : 1;
  36         u8 b_path : 1;
  37         u8 phy_speed : 2; /* As in the self ID packet. */
  38         u8 max_speed : 2; /* Minimum of all phy-speeds on the path from the
  39                            * local node to this node. */
  40         u8 max_depth : 4; /* Maximum depth to any leaf node */
  41         u8 max_hops : 4;  /* Max hops in this sub tree */
  42         atomic_t ref_count;
  43
  44         /* For serializing node topology into a list. */
  45         struct list_head link;
  46
  47         /* Upper layer specific data. */
  48         void *data;
  49
  50         struct fw_node *ports[0];
  51 };
  52
  53 static inline struct fw_node *
  54 fw_node_get(struct fw_node *node)
  55 {
  56         atomic_inc(&node->ref_count);
  57
  58         return node;
  59 }
  60
  61 static inline void
  62 fw_node_put(struct fw_node *node)
  63 {
  64         if (atomic_dec_and_test(&node->ref_count))
  65                 kfree(node);
  66 }
  67
  68 void
  69 fw_destroy_nodes(struct fw_card *card);
  70
  71 int
  72 fw_compute_block_crc(u32 *block);
  73
  74
  75 #endif /* __fw_topology_h */