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 * Functions for LOOP initialization, configuration,
50 * and monitoring.
51 *
52 * <hr>$Revision: 70030 $<hr>
53 */
54#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
55#include <asm/octeon/cvmx.h>
56#include <asm/octeon/cvmx-config.h>
57#ifdef CVMX_ENABLE_PKO_FUNCTIONS
58#include <asm/octeon/cvmx-helper.h>
59#endif
60#include <asm/octeon/cvmx-pip-defs.h>
61#else
62#if !defined(__FreeBSD__) || !defined(_KERNEL)
63#include "executive-config.h"
64#include "cvmx-config.h"
65#ifdef CVMX_ENABLE_PKO_FUNCTIONS
66
67#include "cvmx.h"
68#include "cvmx-helper.h"
69#endif
70#else
71#include "cvmx.h"
72#include "cvmx-helper.h"
73#endif
74#endif
75#ifdef CVMX_ENABLE_PKO_FUNCTIONS
76
77
78int __cvmx_helper_loop_enumerate(int interface)
79{
80	return (OCTEON_IS_MODEL(OCTEON_CN68XX) ? 8 : 4);
81}
82
83/**
84 * @INTERNAL
85 * Probe a LOOP interface and determine the number of ports
86 * connected to it. The LOOP interface should still be down
87 * after this call.
88 *
89 * @param interface Interface to probe
90 *
91 * @return Number of ports on the interface. Zero to disable.
92 */
93int __cvmx_helper_loop_probe(int interface)
94{
95	return __cvmx_helper_loop_enumerate(interface);
96}
97
98
99/**
100 * @INTERNAL
101 * Bringup and enable a LOOP interface. After this call packet
102 * I/O should be fully functional. This is called with IPD
103 * enabled but PKO disabled.
104 *
105 * @param interface Interface to bring up
106 *
107 * @return Zero on success, negative on failure
108 */
109int __cvmx_helper_loop_enable(int interface)
110{
111    cvmx_pip_prt_cfgx_t port_cfg;
112    int num_ports, index;
113    unsigned long offset;
114
115    num_ports = __cvmx_helper_get_num_ipd_ports(interface);
116
117    /*
118     * We need to disable length checking so packet < 64 bytes and jumbo
119     * frames don't get errors
120     */
121    for (index = 0; index < num_ports; index++) {
122        offset = ((octeon_has_feature(OCTEON_FEATURE_PKND)) ?
123	    cvmx_helper_get_pknd(interface, index) :
124            cvmx_helper_get_ipd_port(interface, index));
125
126        port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(offset));
127        port_cfg.s.maxerr_en = 0;
128        port_cfg.s.minerr_en = 0;
129        cvmx_write_csr(CVMX_PIP_PRT_CFGX(offset), port_cfg.u64);
130    }
131
132    /*
133     * Disable FCS stripping for loopback ports
134     */
135    if (!octeon_has_feature(OCTEON_FEATURE_PKND)) {
136        cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;
137        ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
138        ipd_sub_port_fcs.s.port_bit2 = 0;
139        cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
140    }
141
142    return 0;
143}
144
145#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
146
147