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 <asm/octeon/cvmx-config.h>
35
36 #include <asm/octeon/cvmx-helper.h>
37
38 #include <asm/octeon/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 }