1 files changed, 113 insertions, 0 deletions
diff --git a/cvmx-helper-loop.c b/cvmx-helper-loop.c
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+/***********************license start***************
+ *  Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
+ *  reserved.
+ *
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *      * Redistributions of source code must retain the above copyright
+ *        notice, this list of conditions and the following disclaimer.
+ *
+ *      * Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials provided
+ *        with the distribution.
+ *
+ *      * Neither the name of Cavium Networks nor the names of
+ *        its contributors may be used to endorse or promote products
+ *        derived from this software without specific prior written
+ *        permission.
+ *
+ *  TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
+ *  AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS
+ *  OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
+ *  RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
+ *  REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
+ *  DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
+ *  OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
+ *  PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET
+ *  POSSESSION OR CORRESPONDENCE TO DESCRIPTION.  THE ENTIRE RISK ARISING OUT
+ *  OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
+ *
+ *
+ *  For any questions regarding licensing please contact marketing@caviumnetworks.com
+ *
+ ***********************license end**************************************/
+
+
+
+
+
+
+/**
+ * @file
+ *
+ * Functions for LOOP initialization, configuration,
+ * and monitoring.
+ *
+ * <hr>$Revision: 41586 $<hr>
+ */
+#include "executive-config.h"
+#include "cvmx-config.h"
+#ifdef CVMX_ENABLE_PKO_FUNCTIONS
+
+#include "cvmx.h"
+#include "cvmx-helper.h"
+
+
+/**
+ * @INTERNAL
+ * Probe a LOOP interface and determine the number of ports
+ * connected to it. The LOOP interface should still be down
+ * after this call.
+ *
+ * @param interface Interface to probe
+ *
+ * @return Number of ports on the interface. Zero to disable.
+ */
+int __cvmx_helper_loop_probe(int interface)
+{
+    cvmx_ipd_sub_port_fcs_t ipd_sub_port_fcs;
+    int num_ports = 4;
+    int port;
+
+    /* We need to disable length checking so packet < 64 bytes and jumbo
+        frames don't get errors */
+    for (port=0; port<num_ports; port++)
+    {
+        cvmx_pip_port_cfg_t port_cfg;
+        int ipd_port = cvmx_helper_get_ipd_port(interface, port);
+        port_cfg.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
+        port_cfg.s.maxerr_en = 0;
+        port_cfg.s.minerr_en = 0;
+        cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_cfg.u64);
+    }
+
+    /* Disable FCS stripping for loopback ports */
+    ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
+    ipd_sub_port_fcs.s.port_bit2 = 0;
+    cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
+    return num_ports;
+}
+
+
+/**
+ * @INTERNAL
+ * Bringup and enable a LOOP interface. After this call packet
+ * I/O should be fully functional. This is called with IPD
+ * enabled but PKO disabled.
+ *
+ * @param interface Interface to bring up
+ *
+ * @return Zero on success, negative on failure
+ */
+int __cvmx_helper_loop_enable(int interface)
+{
+    /* Do nothing. */
+    return 0;
+}
+
+#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
+