1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020 Marvell International Ltd. 4 * 5 * Functions for SRIO initialization, configuration, 6 * and monitoring. 7 */ 8 9 #ifndef __CVMX_HELPER_SRIO_H__ 10 #define __CVMX_HELPER_SRIO_H__ 11 12 /** 13 * @INTERNAL 14 * Convert interface number to sRIO link number 15 * per SoC model. 16 * 17 * @param xiface Interface to convert 18 * 19 * @return Srio link number 20 */ 21 int __cvmx_helper_srio_port(int xiface); 22 23 /** 24 * @INTERNAL 25 * Probe a SRIO interface and determine the number of ports 26 * connected to it. The SRIO interface should still be down after 27 * this call. 28 * 29 * @param xiface Interface to probe 30 * 31 * @return Number of ports on the interface. Zero to disable. 32 */ 33 int __cvmx_helper_srio_probe(int xiface); 34 35 /** 36 * @INTERNAL 37 * Bringup and enable a SRIO interface. After this call packet 38 * I/O should be fully functional. This is called with IPD 39 * enabled but PKO disabled. 40 * 41 * @param xiface Interface to bring up 42 * 43 * @return Zero on success, negative on failure 44 */ 45 int __cvmx_helper_srio_enable(int xiface); 46 47 /** 48 * @INTERNAL 49 * Return the link state of an IPD/PKO port as returned by SRIO link status. 50 * 51 * @param ipd_port IPD/PKO port to query 52 * 53 * @return Link state 54 */ 55 cvmx_helper_link_info_t __cvmx_helper_srio_link_get(int ipd_port); 56 57 /** 58 * @INTERNAL 59 * Configure an IPD/PKO port for the specified link state. This 60 * function does not influence auto negotiation at the PHY level. 61 * The passed link state must always match the link state returned 62 * by cvmx_helper_link_get(). It is normally best to use 63 * cvmx_helper_link_autoconf() instead. 64 * 65 * @param ipd_port IPD/PKO port to configure 66 * @param link_info The new link state 67 * 68 * @return Zero on success, negative on failure 69 */ 70 int __cvmx_helper_srio_link_set(int ipd_port, cvmx_helper_link_info_t link_info); 71 72 #endif 73