cvmx-helper-npi.c revision 210286 
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38
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42
43
44/**
45 * @file
46 *
47 * Functions for NPI 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 NPI interface and determine the number of ports
63 * connected to it. The NPI 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_npi_probe(int interface)
71{
72#if CVMX_PKO_QUEUES_PER_PORT_PCI > 0
73    if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
74        return 4;
75    else if (OCTEON_IS_MODEL(OCTEON_CN56XX) && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X))
76        return 4; /* The packet engines didn't exist before pass 2 */
77    else if (OCTEON_IS_MODEL(OCTEON_CN52XX) && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X))
78        return 4; /* The packet engines didn't exist before pass 2 */
79#if 0
80    /* Technically CN30XX, CN31XX, and CN50XX contain packet engines, but
81        nobody ever uses them. Since this is the case, we disable them here */
82    else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
83        return 2;
84    else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
85        return 1;
86#endif
87#endif
88    return 0;
89}
90
91
92/**
93 * @INTERNAL
94 * Bringup and enable a NPI interface. After this call packet
95 * I/O should be fully functional. This is called with IPD
96 * enabled but PKO disabled.
97 *
98 * @param interface Interface to bring up
99 *
100 * @return Zero on success, negative on failure
101 */
102int __cvmx_helper_npi_enable(int interface)
103{
104    /* On CN50XX, CN52XX, and CN56XX we need to disable length checking
105        so packet < 64 bytes and jumbo frames don't get errors */
106    if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) && !OCTEON_IS_MODEL(OCTEON_CN58XX))
107    {
108        int num_ports = cvmx_helper_ports_on_interface(interface);
109        int port;
110        for (port=0; port<num_ports; port++)
111        {
112            cvmx_pip_port_cfg_t port_cfg;
113            int ipd_port = cvmx_helper_get_ipd_port(interface, port);
114            port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
115            port_cfg.s.maxerr_en = 0;
116            port_cfg.s.minerr_en = 0;
117            cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
118        }
119    }
120
121    /* Enables are controlled by the remote host, so nothing to do here */
122    return 0;
123}
124
125#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
126
127