cvmx-helper-npi.c revision 210311 
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38
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40
41
42
43
44/**
45 * @file
46 *
47 * Functions for NPI initialization, configuration,
48 * and monitoring.
49 *
50 * <hr>$Revision: 41586 $<hr>
51 */
52#include "cvmx.h"
53#include "cvmx-helper.h"
54
55#ifdef CVMX_ENABLE_PKO_FUNCTIONS
56/**
57 * @INTERNAL
58 * Probe a NPI interface and determine the number of ports
59 * connected to it. The NPI interface should still be down
60 * after this call.
61 *
62 * @param interface Interface to probe
63 *
64 * @return Number of ports on the interface. Zero to disable.
65 */
66int __cvmx_helper_npi_probe(int interface)
67{
68#if CVMX_PKO_QUEUES_PER_PORT_PCI > 0
69    if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
70        return 4;
71    else if (OCTEON_IS_MODEL(OCTEON_CN56XX) && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X))
72        return 4; /* The packet engines didn't exist before pass 2 */
73    else if (OCTEON_IS_MODEL(OCTEON_CN52XX) && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X))
74        return 4; /* The packet engines didn't exist before pass 2 */
75#if 0
76    /* Technically CN30XX, CN31XX, and CN50XX contain packet engines, but
77        nobody ever uses them. Since this is the case, we disable them here */
78    else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
79        return 2;
80    else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
81        return 1;
82#endif
83#endif
84    return 0;
85}
86
87
88/**
89 * @INTERNAL
90 * Bringup and enable a NPI interface. After this call packet
91 * I/O should be fully functional. This is called with IPD
92 * enabled but PKO disabled.
93 *
94 * @param interface Interface to bring up
95 *
96 * @return Zero on success, negative on failure
97 */
98int __cvmx_helper_npi_enable(int interface)
99{
100    /* On CN50XX, CN52XX, and CN56XX we need to disable length checking
101        so packet < 64 bytes and jumbo frames don't get errors */
102    if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) && !OCTEON_IS_MODEL(OCTEON_CN58XX))
103    {
104        int num_ports = cvmx_helper_ports_on_interface(interface);
105        int port;
106        for (port=0; port<num_ports; port++)
107        {
108            cvmx_pip_port_cfg_t port_cfg;
109            int ipd_port = cvmx_helper_get_ipd_port(interface, port);
110            port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
111            port_cfg.s.maxerr_en = 0;
112            port_cfg.s.minerr_en = 0;
113            cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
114        }
115    }
116
117    /* Enables are controlled by the remote host, so nothing to do here */
118    return 0;
119}
120
121#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
122
123