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 #include <asm/octeon/cvmx-mio-defs.h>
35 #include <asm/octeon/cvmx-rnm-defs.h>
36 
37 enum octeon_feature {
38 	/* CN68XX uses port kinds for packet interface */
39 	OCTEON_FEATURE_PKND,
40 	/* CN68XX has different fields in word0 - word2 */
41 	OCTEON_FEATURE_CN68XX_WQE,
42 	/*
43 	 * Octeon models in the CN5XXX family and higher support
44 	 * atomic add instructions to memory (saa/saad).
45 	 */
46 	OCTEON_FEATURE_SAAD,
47 	/* Does this Octeon support the ZIP offload engine? */
48 	OCTEON_FEATURE_ZIP,
49 	OCTEON_FEATURE_DORM_CRYPTO,
50 	/* Does this Octeon support PCI express? */
51 	OCTEON_FEATURE_PCIE,
52 	/* Does this Octeon support SRIOs */
53 	OCTEON_FEATURE_SRIO,
54 	/*  Does this Octeon support Interlaken */
55 	OCTEON_FEATURE_ILK,
56 	/* Some Octeon models support internal memory for storing
57 	 * cryptographic keys */
58 	OCTEON_FEATURE_KEY_MEMORY,
59 	/* Octeon has a LED controller for banks of external LEDs */
60 	OCTEON_FEATURE_LED_CONTROLLER,
61 	/* Octeon has a trace buffer */
62 	OCTEON_FEATURE_TRA,
63 	/* Octeon has a management port */
64 	OCTEON_FEATURE_MGMT_PORT,
65 	/* Octeon has a raid unit */
66 	OCTEON_FEATURE_RAID,
67 	/* Octeon has a builtin USB */
68 	OCTEON_FEATURE_USB,
69 	/* Octeon IPD can run without using work queue entries */
70 	OCTEON_FEATURE_NO_WPTR,
71 	/* Octeon has DFA state machines */
72 	OCTEON_FEATURE_DFA,
73 	/* Octeon MDIO block supports clause 45 transactions for 10
74 	 * Gig support */
75 	OCTEON_FEATURE_MDIO_CLAUSE_45,
76 	/*
77 	 *  CN52XX and CN56XX used a block named NPEI for PCIe
78 	 *  access. Newer chips replaced this with SLI+DPI.
79 	 */
80 	OCTEON_FEATURE_NPEI,
81 	OCTEON_FEATURE_HFA,
82 	OCTEON_FEATURE_DFM,
83 	OCTEON_FEATURE_CIU2,
84 	OCTEON_FEATURE_CIU3,
85 	/* Octeon has FPA first seen on 78XX */
86 	OCTEON_FEATURE_FPA3,
87 	OCTEON_FEATURE_FAU,
88 	OCTEON_MAX_FEATURE
89 };
90 
91 enum octeon_feature_bits {
92 	OCTEON_HAS_CRYPTO = 0x0001,	/* Crypto acceleration using COP2 */
93 };
94 extern enum octeon_feature_bits __octeon_feature_bits;
95 
96 /**
97  * octeon_has_crypto() - Check if this OCTEON has crypto acceleration support.
98  *
99  * Returns: Non-zero if the feature exists. Zero if the feature does not exist.
100  */
octeon_has_crypto(void)101 static inline int octeon_has_crypto(void)
102 {
103 	return __octeon_feature_bits & OCTEON_HAS_CRYPTO;
104 }
105 
106 /**
107  * Determine if the current Octeon supports a specific feature. These
108  * checks have been optimized to be fairly quick, but they should still
109  * be kept out of fast path code.
110  *
111  * @feature: Feature to check for. This should always be a constant so the
112  *		  compiler can remove the switch statement through optimization.
113  *
114  * Returns Non zero if the feature exists. Zero if the feature does not
115  *	   exist.
116  */
octeon_has_feature(enum octeon_feature feature)117 static inline bool octeon_has_feature(enum octeon_feature feature)
118 {
119 	switch (feature) {
120 	case OCTEON_FEATURE_SAAD:
121 		return !OCTEON_IS_MODEL(OCTEON_CN3XXX);
122 
123 	case OCTEON_FEATURE_DORM_CRYPTO:
124 		if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
125 			union cvmx_mio_fus_dat2 fus_2;
126 			fus_2.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT2);
127 			return !fus_2.s.nocrypto && !fus_2.s.nomul && fus_2.s.dorm_crypto;
128 		} else {
129 			return false;
130 		}
131 
132 	case OCTEON_FEATURE_PCIE:
133 		return OCTEON_IS_MODEL(OCTEON_CN56XX)
134 			|| OCTEON_IS_MODEL(OCTEON_CN52XX)
135 			|| OCTEON_IS_MODEL(OCTEON_CN6XXX)
136 			|| OCTEON_IS_MODEL(OCTEON_CN7XXX);
137 
138 	case OCTEON_FEATURE_SRIO:
139 		return OCTEON_IS_MODEL(OCTEON_CN63XX)
140 			|| OCTEON_IS_MODEL(OCTEON_CN66XX);
141 
142 	case OCTEON_FEATURE_ILK:
143 		return (OCTEON_IS_MODEL(OCTEON_CN68XX));
144 
145 	case OCTEON_FEATURE_KEY_MEMORY:
146 		return OCTEON_IS_MODEL(OCTEON_CN38XX)
147 			|| OCTEON_IS_MODEL(OCTEON_CN58XX)
148 			|| OCTEON_IS_MODEL(OCTEON_CN56XX)
149 			|| OCTEON_IS_MODEL(OCTEON_CN6XXX);
150 
151 	case OCTEON_FEATURE_LED_CONTROLLER:
152 		return OCTEON_IS_MODEL(OCTEON_CN38XX)
153 			|| OCTEON_IS_MODEL(OCTEON_CN58XX)
154 			|| OCTEON_IS_MODEL(OCTEON_CN56XX);
155 
156 	case OCTEON_FEATURE_TRA:
157 		return !(OCTEON_IS_MODEL(OCTEON_CN30XX)
158 			 || OCTEON_IS_MODEL(OCTEON_CN50XX));
159 	case OCTEON_FEATURE_MGMT_PORT:
160 		return OCTEON_IS_MODEL(OCTEON_CN56XX)
161 			|| OCTEON_IS_MODEL(OCTEON_CN52XX)
162 			|| OCTEON_IS_MODEL(OCTEON_CN6XXX);
163 
164 	case OCTEON_FEATURE_RAID:
165 		return OCTEON_IS_MODEL(OCTEON_CN56XX)
166 			|| OCTEON_IS_MODEL(OCTEON_CN52XX)
167 			|| OCTEON_IS_MODEL(OCTEON_CN6XXX);
168 
169 	case OCTEON_FEATURE_USB:
170 		return !(OCTEON_IS_MODEL(OCTEON_CN38XX)
171 			 || OCTEON_IS_MODEL(OCTEON_CN58XX));
172 
173 	case OCTEON_FEATURE_NO_WPTR:
174 		return (OCTEON_IS_MODEL(OCTEON_CN56XX)
175 			|| OCTEON_IS_MODEL(OCTEON_CN52XX)
176 			|| OCTEON_IS_MODEL(OCTEON_CN6XXX))
177 			  && !OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
178 			  && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X);
179 
180 	case OCTEON_FEATURE_MDIO_CLAUSE_45:
181 		return !(OCTEON_IS_MODEL(OCTEON_CN3XXX)
182 			 || OCTEON_IS_MODEL(OCTEON_CN58XX)
183 			 || OCTEON_IS_MODEL(OCTEON_CN50XX));
184 
185 	case OCTEON_FEATURE_NPEI:
186 		return OCTEON_IS_MODEL(OCTEON_CN56XX)
187 			|| OCTEON_IS_MODEL(OCTEON_CN52XX);
188 
189 	case OCTEON_FEATURE_PKND:
190 		return OCTEON_IS_MODEL(OCTEON_CN68XX);
191 
192 	case OCTEON_FEATURE_CN68XX_WQE:
193 		return OCTEON_IS_MODEL(OCTEON_CN68XX);
194 
195 	case OCTEON_FEATURE_CIU2:
196 		return OCTEON_IS_MODEL(OCTEON_CN68XX);
197 	case OCTEON_FEATURE_CIU3:
198 	case OCTEON_FEATURE_FPA3:
199 		return OCTEON_IS_MODEL(OCTEON_CN78XX)
200 			|| OCTEON_IS_MODEL(OCTEON_CNF75XX)
201 			|| OCTEON_IS_MODEL(OCTEON_CN73XX);
202 	case OCTEON_FEATURE_FAU:
203 		return !(OCTEON_IS_MODEL(OCTEON_CN78XX)
204 			 || OCTEON_IS_MODEL(OCTEON_CNF75XX)
205 			 || OCTEON_IS_MODEL(OCTEON_CN73XX));
206 
207 	default:
208 		break;
209 	}
210 	return false;
211 }
212 
213 #endif /* __OCTEON_FEATURE_H__ */
214