1/***********************license start***************
2 * Copyright (c) 2003-2010  Cavium Inc. (support@cavium.com). All rights
3 * reserved.
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 *   * Redistributions of source code must retain the above copyright
11 *     notice, this list of conditions and the following disclaimer.
12 *
13 *   * Redistributions in binary form must reproduce the above
14 *     copyright notice, this list of conditions and the following
15 *     disclaimer in the documentation and/or other materials provided
16 *     with the distribution.
17
18 *   * Neither the name of Cavium Inc. nor the names of
19 *     its contributors may be used to endorse or promote products
20 *     derived from this software without specific prior written
21 *     permission.
22
23 * This Software, including technical data, may be subject to U.S. export  control
24 * laws, including the U.S. Export Administration Act and its  associated
25 * regulations, and may be subject to export or import  regulations in other
26 * countries.
27
28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
29 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
30 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
31 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
32 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
33 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
34 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
35 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
36 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE  RISK ARISING OUT OF USE OR
37 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
38 ***********************license end**************************************/
39
40
41
42
43
44
45
46/**
47 * @file
48 *
49 * Interface to the GMX hardware.
50 *
51 * <hr>$Revision: 70030 $<hr>
52 */
53
54#ifndef __CVMX_GMX_H__
55#define __CVMX_GMX_H__
56
57#ifdef	__cplusplus
58extern "C" {
59#endif
60
61/* CSR typedefs have been moved to cvmx-gmx-defs.h */
62
63/**
64 * Disables the sending of flow control (pause) frames on the specified
65 * RGMII port(s).
66 *
67 * @param interface Which interface (0 or 1)
68 * @param port_mask Mask (4bits) of which ports on the interface to disable
69 *                  backpressure on.
70 *                  1 => disable backpressure
71 *                  0 => enable backpressure
72 *
73 * @return 0 on success
74 *         -1 on error
75 */
76
77static inline int cvmx_gmx_set_backpressure_override(uint32_t interface, uint32_t port_mask)
78{
79    cvmx_gmxx_tx_ovr_bp_t gmxx_tx_ovr_bp;
80    /* Check for valid arguments */
81    if (port_mask & ~0xf || interface & ~0x1)
82        return(-1);
83    gmxx_tx_ovr_bp.u64 = 0;
84    gmxx_tx_ovr_bp.s.en = port_mask; /* Per port Enable back pressure override */
85    gmxx_tx_ovr_bp.s.ign_full = port_mask; /* Ignore the RX FIFO full when computing BP */
86    cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmxx_tx_ovr_bp.u64);
87    return(0);
88
89}
90
91#ifdef	__cplusplus
92}
93#endif
94
95#endif
96
97