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 #endif
63 return 0;
64 }
65
66 /**
67 * Bringup and enable a NPI interface. After this call packet
68 * I/O should be fully functional. This is called with IPD
69 * enabled but PKO disabled.
70 *
71 * @interface: Interface to bring up
72 *
73 * Returns Zero on success, negative on failure
74 */
75 int __cvmx_helper_npi_enable(int interface)
76 {
77 /*
78 * On CN50XX, CN52XX, and CN56XX we need to disable length
79 * checking so packet < 64 bytes and jumbo frames don't get
80 * errors.
81 */
82 if (!OCTEON_IS_MODEL(OCTEON_CN3XXX) &&
83 !OCTEON_IS_MODEL(OCTEON_CN58XX)) {
84 int num_ports = cvmx_helper_ports_on_interface(interface);
85 int port;
86 for (port = 0; port < num_ports; port++) {
87 union cvmx_pip_prt_cfgx port_cfg;
88 int ipd_port =
89 cvmx_helper_get_ipd_port(interface, port);
90 port_cfg.u64 =
91 cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
92 port_cfg.s.maxerr_en = 0;
93 port_cfg.s.minerr_en = 0;
94 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port),
95 port_cfg.u64);
96 }
97 }
98
99 /* Enables are controlled by the remote host, so nothing to do here */
100 return 0;
101 }
102
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