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 }
34