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 void cvm_oct_poll_controller(struct net_device *dev);
9 void cvm_oct_rx_initialize(void);
10 void cvm_oct_rx_shutdown(void);
11 
cvm_oct_rx_refill_pool(int fill_threshold)12 static inline void cvm_oct_rx_refill_pool(int fill_threshold)
13 {
14 	int number_to_free;
15 	int num_freed;
16 	/* Refill the packet buffer pool */
17 	number_to_free =
18 		cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
19 
20 	if (number_to_free > fill_threshold) {
21 		cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
22 				      -number_to_free);
23 		num_freed = cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL,
24 						 CVMX_FPA_PACKET_POOL_SIZE,
25 						 number_to_free);
26 		if (num_freed != number_to_free) {
27 			cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
28 					      number_to_free - num_freed);
29 		}
30 	}
31 }
32