David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 1 | /***********************license start*************** |
| 2 | * Author: Cavium Networks |
| 3 | * |
| 4 | * Contact: support@caviumnetworks.com |
| 5 | * This file is part of the OCTEON SDK |
| 6 | * |
| 7 | * Copyright (c) 2003-2008 Cavium Networks |
| 8 | * |
| 9 | * This file is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License, Version 2, as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This file is distributed in the hope that it will be useful, but |
| 14 | * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty |
| 15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or |
| 16 | * NONINFRINGEMENT. See the GNU General Public License for more |
| 17 | * details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this file; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * or visit http://www.gnu.org/licenses/. |
| 23 | * |
| 24 | * This file may also be available under a different license from Cavium. |
| 25 | * Contact Cavium Networks for more information |
| 26 | ***********************license end**************************************/ |
| 27 | |
| 28 | /* |
| 29 | * Functions for NPI initialization, configuration, |
| 30 | * and monitoring. |
| 31 | */ |
| 32 | #include <asm/octeon/octeon.h> |
| 33 | |
| 34 | #include "cvmx-config.h" |
| 35 | |
| 36 | #include "cvmx-helper.h" |
| 37 | |
| 38 | #include "cvmx-pip-defs.h" |
| 39 | |
| 40 | /** |
| 41 | * Probe a NPI interface and determine the number of ports |
| 42 | * connected to it. The NPI interface should still be down |
| 43 | * after this call. |
| 44 | * |
| 45 | * @interface: Interface to probe |
| 46 | * |
| 47 | * Returns Number of ports on the interface. Zero to disable. |
| 48 | */ |
| 49 | int __cvmx_helper_npi_probe(int interface) |
| 50 | { |
| 51 | #if CVMX_PKO_QUEUES_PER_PORT_PCI > 0 |
| 52 | if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)) |
| 53 | return 4; |
| 54 | else if (OCTEON_IS_MODEL(OCTEON_CN56XX) |
| 55 | && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)) |
| 56 | /* The packet engines didn't exist before pass 2 */ |
| 57 | return 4; |
| 58 | else if (OCTEON_IS_MODEL(OCTEON_CN52XX) |
| 59 | && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) |
| 60 | /* The packet engines didn't exist before pass 2 */ |
| 61 | return 4; |
| 62 | #if 0 |
| 63 | /* |
| 64 | * Technically CN30XX, CN31XX, and CN50XX contain packet |
| 65 | * engines, but nobody ever uses them. Since this is the case, |
| 66 | * we disable them here. |
| 67 | */ |
| 68 | else if (OCTEON_IS_MODEL(OCTEON_CN31XX) |
| 69 | || OCTEON_IS_MODEL(OCTEON_CN50XX)) |
| 70 | return 2; |
| 71 | else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) |
| 72 | return 1; |
| 73 | #endif |
| 74 | #endif |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Bringup and enable a NPI interface. After this call packet |
| 80 | * I/O should be fully functional. This is called with IPD |
| 81 | * enabled but PKO disabled. |
| 82 | * |
| 83 | * @interface: Interface to bring up |
| 84 | * |
| 85 | * Returns Zero on success, negative on failure |
| 86 | */ |
| 87 | int __cvmx_helper_npi_enable(int interface) |
| 88 | { |
| 89 | /* |
| 90 | * On CN50XX, CN52XX, and CN56XX we need to disable length |
| 91 | * checking so packet < 64 bytes and jumbo frames don't get |
| 92 | * errors. |
| 93 | */ |
| 94 | if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) && |
| 95 | !OCTEON_IS_MODEL(OCTEON_CN58XX)) { |
| 96 | int num_ports = cvmx_helper_ports_on_interface(interface); |
| 97 | int port; |
| 98 | for (port = 0; port < num_ports; port++) { |
| 99 | union cvmx_pip_prt_cfgx port_cfg; |
| 100 | int ipd_port = |
| 101 | cvmx_helper_get_ipd_port(interface, port); |
| 102 | port_cfg.u64 = |
| 103 | cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port)); |
| 104 | port_cfg.s.maxerr_en = 0; |
| 105 | port_cfg.s.minerr_en = 0; |
| 106 | cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), |
| 107 | port_cfg.u64); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /* Enables are controlled by the remote host, so nothing to do here */ |
| 112 | return 0; |
| 113 | } |