cvmx-helper-loop.c revision 210284 
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38
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42
43
44/**
45 * @file
46 *
47 * Functions for LOOP initialization, configuration,
48 * and monitoring.
49 *
50 * <hr>$Revision: 41586 $<hr>
51 */
52#include "executive-config.h"
53#include "cvmx-config.h"
54#ifdef CVMX_ENABLE_PKO_FUNCTIONS
55
56#include "cvmx.h"
57#include "cvmx-helper.h"
58
59
60/**
61 * @INTERNAL
62 * Probe a LOOP interface and determine the number of ports
63 * connected to it. The LOOP interface should still be down
64 * after this call.
65 *
66 * @param interface Interface to probe
67 *
68 * @return Number of ports on the interface. Zero to disable.
69 */
70int __cvmx_helper_loop_probe(int interface)
71{
72    cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;
73    int num_ports = 4;
74    int port;
75
76    /* We need to disable length checking so packet < 64 bytes and jumbo
77        frames don't get errors */
78    for (port=0; port<num_ports; port++)
79    {
80        cvmx_pip_port_cfg_t port_cfg;
81        int ipd_port = cvmx_helper_get_ipd_port(interface, port);
82        port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
83        port_cfg.s.maxerr_en = 0;
84        port_cfg.s.minerr_en = 0;
85        cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
86    }
87
88    /* Disable FCS stripping for loopback ports */
89    ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
90    ipd_sub_port_fcs.s.port_bit2 = 0;
91    cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
92    return num_ports;
93}
94
95
96/**
97 * @INTERNAL
98 * Bringup and enable a LOOP interface. After this call packet
99 * I/O should be fully functional. This is called with IPD
100 * enabled but PKO disabled.
101 *
102 * @param interface Interface to bring up
103 *
104 * @return Zero on success, negative on failure
105 */
106int __cvmx_helper_loop_enable(int interface)
107{
108    /* Do nothing. */
109    return 0;
110}
111
112#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
113
114