drivers/staging/octeon/ethernet-tx.h

   1 /*********************************************************************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2007 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26 *********************************************************************/
  27
  28 int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev);
  29 int cvm_oct_xmit_pow(struct sk_buff *skb, struct net_device *dev);
  30 int cvm_oct_transmit_qos(struct net_device *dev, void *work_queue_entry,
  31                          int do_free, int qos);
  32 void cvm_oct_tx_shutdown(struct net_device *dev);
  33
  34 /**
  35  * Free dead transmit skbs.
  36  *
  37  * @priv:               The driver data
  38  * @skb_to_free:        The number of SKBs to free (free none if negative).
  39  * @qos:                The queue to free from.
  40  * @take_lock:          If true, acquire the skb list lock.
  41  */
  42 static inline void cvm_oct_free_tx_skbs(struct octeon_ethernet *priv,
  43                                         int skb_to_free,
  44                                         int qos, int take_lock)
  45 {
  46         /* Free skbuffs not in use by the hardware.  */
  47         if (skb_to_free > 0) {
  48                 if (take_lock)
  49                         spin_lock(&priv->tx_free_list[qos].lock);
  50                 while (skb_to_free > 0) {
  51                         dev_kfree_skb(__skb_dequeue(&priv->tx_free_list[qos]));
  52                         skb_to_free--;
  53                 }
  54                 if (take_lock)
  55                         spin_unlock(&priv->tx_free_list[qos].lock);
  56         }
  57 }