drivers/staging/octeon/ethernet-rx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * This file is based on code from OCTEON SDK by Cavium Networks.
   4  *
   5  * Copyright (c) 2003-2007 Cavium Networks
   6  */
   7
   8 #include <asm/octeon/cvmx-fau.h>
   9
  10 void cvm_oct_poll_controller(struct net_device *dev);
  11 void cvm_oct_rx_initialize(void);
  12 void cvm_oct_rx_shutdown(void);
  13
  14 static inline void cvm_oct_rx_refill_pool(int fill_threshold)
  15 {
  16         int number_to_free;
  17         int num_freed;
  18         /* Refill the packet buffer pool */
  19         number_to_free =
  20                 cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
  21
  22         if (number_to_free > fill_threshold) {
  23                 cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
  24                                       -number_to_free);
  25                 num_freed = cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL,
  26                                                  CVMX_FPA_PACKET_POOL_SIZE,
  27                                                  number_to_free);
  28                 if (num_freed != number_to_free) {
  29                         cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
  30                                               number_to_free - num_freed);
  31                 }
  32         }
  33 }