ethernet-rx.h

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/*********************************************************************
 * Author: Cavium Networks
 *
 * Contact: [email protected]
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2007 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
*********************************************************************/
#include <asm/octeon/cvmx-fau.h>

void cvm_oct_poll_controller(struct net_device *dev);
void cvm_oct_rx_initialize(void);
void cvm_oct_rx_shutdown(void);

static inline void cvm_oct_rx_refill_pool(int fill_threshold)
{
    int number_to_free;
    int num_freed;
    /* Refill the packet buffer pool */
    number_to_free =
        cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);

    if (number_to_free > fill_threshold) {
        cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
                      -number_to_free);
        num_freed = cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL,
                         CVMX_FPA_PACKET_POOL_SIZE,
                         number_to_free);
        if (num_freed != number_to_free) {
            cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
                    number_to_free - num_freed);
        }
    }
}