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 * File defining checks for different Octeon features.
30 */
31
32 #ifndef __OCTEON_FEATURE_H__
33 #define __OCTEON_FEATURE_H__
34
35 enum octeon_feature {
36 /*
37 * Octeon models in the CN5XXX family and higher support
38 * atomic add instructions to memory (saa/saad).
39 */
40 OCTEON_FEATURE_SAAD,
41 /* Does this Octeon support the ZIP offload engine? */
42 OCTEON_FEATURE_ZIP,
43 /* Does this Octeon support crypto acceleration using COP2? */
44 OCTEON_FEATURE_CRYPTO,
45 /* Does this Octeon support PCI express? */
46 OCTEON_FEATURE_PCIE,
47 /* Some Octeon models support internal memory for storing
48 * cryptographic keys */
49 OCTEON_FEATURE_KEY_MEMORY,
50 /* Octeon has a LED controller for banks of external LEDs */
51 OCTEON_FEATURE_LED_CONTROLLER,
52 /* Octeon has a trace buffer */
53 OCTEON_FEATURE_TRA,
54 /* Octeon has a management port */
55 OCTEON_FEATURE_MGMT_PORT,
56 /* Octeon has a raid unit */
57 OCTEON_FEATURE_RAID,
58 /* Octeon has a builtin USB */
59 OCTEON_FEATURE_USB,
60 /* Octeon IPD can run without using work queue entries */
61 OCTEON_FEATURE_NO_WPTR,
62 /* Octeon has DFA state machines */
63 OCTEON_FEATURE_DFA,
64 /* Octeon MDIO block supports clause 45 transactions for 10
65 * Gig support */
66 OCTEON_FEATURE_MDIO_CLAUSE_45,
67 };
68
69 static inline int cvmx_fuse_read(int fuse);
70
71 /**
72 * Determine if the current Octeon supports a specific feature. These
73 * checks have been optimized to be fairly quick, but they should still
74 * be kept out of fast path code.
75 *
76 * @feature: Feature to check for. This should always be a constant so the
77 * compiler can remove the switch statement through optimization.
78 *
79 * Returns Non zero if the feature exists. Zero if the feature does not
80 * exist.
81 */
octeon_has_feature(enum octeon_feature feature)82 static inline int octeon_has_feature(enum octeon_feature feature)
83 {
84 switch (feature) {
85 case OCTEON_FEATURE_SAAD:
86 return !OCTEON_IS_MODEL(OCTEON_CN3XXX);
87
88 case OCTEON_FEATURE_ZIP:
89 if (OCTEON_IS_MODEL(OCTEON_CN30XX)
90 || OCTEON_IS_MODEL(OCTEON_CN50XX)
91 || OCTEON_IS_MODEL(OCTEON_CN52XX))
92 return 0;
93 else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
94 return 1;
95 else
96 return !cvmx_fuse_read(121);
97
98 case OCTEON_FEATURE_CRYPTO:
99 return !cvmx_fuse_read(90);
100
101 case OCTEON_FEATURE_PCIE:
102 case OCTEON_FEATURE_MGMT_PORT:
103 case OCTEON_FEATURE_RAID:
104 return OCTEON_IS_MODEL(OCTEON_CN56XX)
105 || OCTEON_IS_MODEL(OCTEON_CN52XX);
106
107 case OCTEON_FEATURE_KEY_MEMORY:
108 case OCTEON_FEATURE_LED_CONTROLLER:
109 return OCTEON_IS_MODEL(OCTEON_CN38XX)
110 || OCTEON_IS_MODEL(OCTEON_CN58XX)
111 || OCTEON_IS_MODEL(OCTEON_CN56XX);
112 case OCTEON_FEATURE_TRA:
113 return !(OCTEON_IS_MODEL(OCTEON_CN30XX)
114 || OCTEON_IS_MODEL(OCTEON_CN50XX));
115 case OCTEON_FEATURE_USB:
116 return !(OCTEON_IS_MODEL(OCTEON_CN38XX)
117 || OCTEON_IS_MODEL(OCTEON_CN58XX));
118 case OCTEON_FEATURE_NO_WPTR:
119 return (OCTEON_IS_MODEL(OCTEON_CN56XX)
120 || OCTEON_IS_MODEL(OCTEON_CN52XX))
121 && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
122 && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X);
123 case OCTEON_FEATURE_DFA:
124 if (!OCTEON_IS_MODEL(OCTEON_CN38XX)
125 && !OCTEON_IS_MODEL(OCTEON_CN31XX)
126 && !OCTEON_IS_MODEL(OCTEON_CN58XX))
127 return 0;
128 else if (OCTEON_IS_MODEL(OCTEON_CN3020))
129 return 0;
130 else if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
131 return 1;
132 else
133 return !cvmx_fuse_read(120);
134 case OCTEON_FEATURE_MDIO_CLAUSE_45:
135 return !(OCTEON_IS_MODEL(OCTEON_CN3XXX)
136 || OCTEON_IS_MODEL(OCTEON_CN58XX)
137 || OCTEON_IS_MODEL(OCTEON_CN50XX));
138 }
139 return 0;
140 }
141
142 #endif /* __OCTEON_FEATURE_H__ */
143