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47 * Functions for LOOP initialization, configuration,
50 * <hr>$Revision: 41586 $<hr>
53 #include "cvmx-helper.h"
56 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
59 * Probe a LOOP interface and determine the number of ports
60 * connected to it. The LOOP interface should still be down
63 * @param interface Interface to probe
65 * @return Number of ports on the interface. Zero to disable.
67 int __cvmx_helper_loop_probe(int interface)
69 cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;
73 /* We need to disable length checking so packet < 64 bytes and jumbo
74 frames don't get errors */
75 for (port=0; port<num_ports; port++)
77 cvmx_pip_port_cfg_t port_cfg;
78 int ipd_port = cvmx_helper_get_ipd_port(interface, port);
79 port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
80 port_cfg.s.maxerr_en = 0;
81 port_cfg.s.minerr_en = 0;
82 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
85 /* Disable FCS stripping for loopback ports */
86 ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
87 ipd_sub_port_fcs.s.port_bit2 = 0;
88 cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
95 * Bringup and enable a LOOP interface. After this call packet
96 * I/O should be fully functional. This is called with IPD
97 * enabled but PKO disabled.
99 * @param interface Interface to bring up
101 * @return Zero on success, negative on failure
103 int __cvmx_helper_loop_enable(int interface)
109 #endif /* CVMX_ENABLE_PKO_FUNCTIONS */