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_port {
  31         struct fw_node *node;
  32         unsigned speed : 3; /* S100, S200, ... S3200 */
  33 };
  34
  35 struct fw_node {
  36         u16 node_id;
  37         u8 color;
  38         u8 port_count;
  39         unsigned link_on : 1;
  40         unsigned initiated_reset : 1;
  41         unsigned b_path : 1;
  42         u8 phy_speed : 3; /* As in the self ID packet. */
  43         u8 max_speed : 5; /* Minimum of all phy-speeds and port speeds on
  44                            * the path from the local node to this node. */
  45         u8 max_depth : 4; /* Maximum depth to any leaf node */
  46         u8 max_hops : 4;  /* Max hops in this sub tree */
  47         atomic_t ref_count;
  48
  49         /* For serializing node topology into a list. */
  50         struct list_head link;
  51
  52         /* Upper layer specific data. */
  53         void *data;
  54
  55         struct fw_port ports[0];
  56 };
  57
  58 static inline struct fw_node *
  59 fw_node(struct list_head *l)
  60 {
  61         return list_entry(l, struct fw_node, link);
  62 }
  63
  64 static inline struct fw_node *
  65 fw_node_get(struct fw_node *node)
  66 {
  67         atomic_inc(&node->ref_count);
  68
  69         return node;
  70 }
  71
  72 static inline void
  73 fw_node_put(struct fw_node *node)
  74 {
  75         if (atomic_dec_and_test(&node->ref_count))
  76                 kfree(node);
  77 }
  78
  79 void
  80 fw_destroy_nodes(struct fw_card *card);
  81
  82 int
  83 fw_compute_block_crc(u32 *block);
  84
  85
  86 #endif /* __fw_topology_h */