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fw-topology.h

/*
 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
 *
 * 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __fw_topology_h
#define __fw_topology_h

enum {
      FW_NODE_CREATED =   0x00,
      FW_NODE_UPDATED =   0x01,
      FW_NODE_DESTROYED = 0x02,
      FW_NODE_LINK_ON =   0x03,
      FW_NODE_LINK_OFF =  0x04,
};

struct fw_node {
      u16 node_id;
      u8 color;
      u8 port_count;
      u8 link_on : 1;
      u8 initiated_reset : 1;
      u8 b_path : 1;
      u8 phy_speed : 2; /* As in the self ID packet. */
      u8 max_speed : 2; /* Minimum of all phy-speeds on the path from the
                     * local node to this node. */
      u8 max_depth : 4; /* Maximum depth to any leaf node */
      u8 max_hops : 4;  /* Max hops in this sub tree */
      atomic_t ref_count;

      /* For serializing node topology into a list. */
      struct list_head link;

      /* Upper layer specific data. */
      void *data;

      struct fw_node *ports[0];
};

static inline struct fw_node *
fw_node_get(struct fw_node *node)
{
      atomic_inc(&node->ref_count);

      return node;
}

static inline void
fw_node_put(struct fw_node *node)
{
      if (atomic_dec_and_test(&node->ref_count))
            kfree(node);
}

void
fw_destroy_nodes(struct fw_card *card);

int
fw_compute_block_crc(u32 *block);


#endif /* __fw_topology_h */

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