summaryrefslogtreecommitdiff
path: root/target/linux/generic/files/crypto/ocf/hifn/hifn7751var.h
blob: c5d30f962a7f435edc30fe523deb5d3cd0dc8b3c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
/* $FreeBSD: src/sys/dev/hifn/hifn7751var.h,v 1.9 2007/03/21 03:42:49 sam Exp $ */
/*	$OpenBSD: hifn7751var.h,v 1.42 2002/04/08 17:49:42 jason Exp $	*/

/*-
 * Invertex AEON / Hifn 7751 driver
 * Copyright (c) 1999 Invertex Inc. All rights reserved.
 * Copyright (c) 1999 Theo de Raadt
 * Copyright (c) 2000-2001 Network Security Technologies, Inc.
 *			http://www.netsec.net
 *
 * Please send any comments, feedback, bug-fixes, or feature requests to
 * software@invertex.com.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Effort sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
 *
 */

#ifndef __HIFN7751VAR_H__
#define __HIFN7751VAR_H__

#ifdef __KERNEL__

/*
 * Some configurable values for the driver.  By default command+result
 * descriptor rings are the same size.  The src+dst descriptor rings
 * are sized at 3.5x the number of potential commands.  Slower parts
 * (e.g. 7951) tend to run out of src descriptors; faster parts (7811)
 * src+cmd/result descriptors.  It's not clear that increasing the size
 * of the descriptor rings helps performance significantly as other
 * factors tend to come into play (e.g. copying misaligned packets).
 */
#define	HIFN_D_CMD_RSIZE	24	/* command descriptors */
#define	HIFN_D_SRC_RSIZE	((HIFN_D_CMD_RSIZE * 7) / 2)	/* source descriptors */
#define	HIFN_D_RES_RSIZE	HIFN_D_CMD_RSIZE	/* result descriptors */
#define	HIFN_D_DST_RSIZE	HIFN_D_SRC_RSIZE	/* destination descriptors */

/*
 *  Length values for cryptography
 */
#define HIFN_DES_KEY_LENGTH		8
#define HIFN_3DES_KEY_LENGTH		24
#define HIFN_MAX_CRYPT_KEY_LENGTH	HIFN_3DES_KEY_LENGTH
#define HIFN_IV_LENGTH			8
#define	HIFN_AES_IV_LENGTH		16
#define HIFN_MAX_IV_LENGTH		HIFN_AES_IV_LENGTH

/*
 *  Length values for authentication
 */
#define HIFN_MAC_KEY_LENGTH		64
#define HIFN_MD5_LENGTH			16
#define HIFN_SHA1_LENGTH		20
#define HIFN_MAC_TRUNC_LENGTH		12

#define MAX_SCATTER 64

/*
 * Data structure to hold all 4 rings and any other ring related data.
 */
struct hifn_dma {
	/*
	 *  Descriptor rings.  We add +1 to the size to accomidate the
	 *  jump descriptor.
	 */
	struct hifn_desc	cmdr[HIFN_D_CMD_RSIZE+1];
	struct hifn_desc	srcr[HIFN_D_SRC_RSIZE+1];
	struct hifn_desc	dstr[HIFN_D_DST_RSIZE+1];
	struct hifn_desc	resr[HIFN_D_RES_RSIZE+1];

	struct hifn_command	*hifn_commands[HIFN_D_RES_RSIZE];

	u_char			command_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_COMMAND];
	u_char			result_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_RESULT];
	u_int32_t		slop[HIFN_D_CMD_RSIZE];

	u_int64_t		test_src, test_dst;

	/*
	 *  Our current positions for insertion and removal from the desriptor
	 *  rings. 
	 */
	int			cmdi, srci, dsti, resi;
	volatile int		cmdu, srcu, dstu, resu;
	int			cmdk, srck, dstk, resk;
};

struct hifn_session {
	int hs_used;
	int hs_mlen;
};

#define	HIFN_RING_SYNC(sc, r, i, f)					\
	/* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */

#define	HIFN_CMDR_SYNC(sc, i, f)	HIFN_RING_SYNC((sc), cmdr, (i), (f))
#define	HIFN_RESR_SYNC(sc, i, f)	HIFN_RING_SYNC((sc), resr, (i), (f))
#define	HIFN_SRCR_SYNC(sc, i, f)	HIFN_RING_SYNC((sc), srcr, (i), (f))
#define	HIFN_DSTR_SYNC(sc, i, f)	HIFN_RING_SYNC((sc), dstr, (i), (f))

#define	HIFN_CMD_SYNC(sc, i, f)						\
	/* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */

#define	HIFN_RES_SYNC(sc, i, f)						\
	/* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */

typedef int bus_size_t;

/*
 * Holds data specific to a single HIFN board.
 */
struct hifn_softc {
	softc_device_decl		 sc_dev;

	struct pci_dev		*sc_pcidev;	/* PCI device pointer */
	spinlock_t		sc_mtx;		/* per-instance lock */

	int			sc_num;		/* for multiple devs */

	ocf_iomem_t		sc_bar0;
	bus_size_t		sc_bar0_lastreg;/* bar0 last reg written */
	ocf_iomem_t		sc_bar1;
	bus_size_t		sc_bar1_lastreg;/* bar1 last reg written */

	int			sc_irq;

	u_int32_t		sc_dmaier;
	u_int32_t		sc_drammodel;	/* 1=dram, 0=sram */
	u_int32_t		sc_pllconfig;	/* 7954/7955/7956 PLL config */

	struct hifn_dma		*sc_dma;
	dma_addr_t		sc_dma_physaddr;/* physical address of sc_dma */

	int			sc_dmansegs;
	int32_t			sc_cid;
	int			sc_maxses;
	int			sc_nsessions;
	struct hifn_session	*sc_sessions;
	int			sc_ramsize;
	int			sc_flags;
#define	HIFN_HAS_RNG		0x1	/* includes random number generator */
#define	HIFN_HAS_PUBLIC		0x2	/* includes public key support */
#define	HIFN_HAS_AES		0x4	/* includes AES support */
#define	HIFN_IS_7811		0x8	/* Hifn 7811 part */
#define	HIFN_IS_7956		0x10	/* Hifn 7956/7955 don't have SDRAM */

	struct timer_list	sc_tickto;	/* for managing DMA */

	int			sc_rngfirst;
	int			sc_rnghz;	/* RNG polling frequency */

	int			sc_c_busy;	/* command ring busy */
	int			sc_s_busy;	/* source data ring busy */
	int			sc_d_busy;	/* destination data ring busy */
	int			sc_r_busy;	/* result ring busy */
	int			sc_active;	/* for initial countdown */
	int			sc_needwakeup;	/* ops q'd wating on resources */
	int			sc_curbatch;	/* # ops submitted w/o int */
	int			sc_suspended;
#ifdef HIFN_VULCANDEV
	struct cdev            *sc_pkdev;
#endif
};

#define	HIFN_LOCK(_sc)		spin_lock_irqsave(&(_sc)->sc_mtx, l_flags)
#define	HIFN_UNLOCK(_sc)	spin_unlock_irqrestore(&(_sc)->sc_mtx, l_flags)

/*
 *  hifn_command_t
 *
 *  This is the control structure used to pass commands to hifn_encrypt().
 *
 *  flags
 *  -----
 *  Flags is the bitwise "or" values for command configuration.  A single
 *  encrypt direction needs to be set:
 *
 *	HIFN_ENCODE or HIFN_DECODE
 *
 *  To use cryptography, a single crypto algorithm must be included:
 *
 *	HIFN_CRYPT_3DES or HIFN_CRYPT_DES
 *
 *  To use authentication is used, a single MAC algorithm must be included:
 *
 *	HIFN_MAC_MD5 or HIFN_MAC_SHA1
 *
 *  By default MD5 uses a 16 byte hash and SHA-1 uses a 20 byte hash.
 *  If the value below is set, hash values are truncated or assumed
 *  truncated to 12 bytes:
 *
 *	HIFN_MAC_TRUNC
 *
 *  Keys for encryption and authentication can be sent as part of a command,
 *  or the last key value used with a particular session can be retrieved
 *  and used again if either of these flags are not specified.
 *
 *	HIFN_CRYPT_NEW_KEY, HIFN_MAC_NEW_KEY
 *
 *  session_num
 *  -----------
 *  A number between 0 and 2048 (for DRAM models) or a number between 
 *  0 and 768 (for SRAM models).  Those who don't want to use session
 *  numbers should leave value at zero and send a new crypt key and/or
 *  new MAC key on every command.  If you use session numbers and
 *  don't send a key with a command, the last key sent for that same
 *  session number will be used.
 *
 *  Warning:  Using session numbers and multiboard at the same time
 *            is currently broken.
 *
 *  mbuf
 *  ----
 *  Either fill in the mbuf pointer and npa=0 or
 *	 fill packp[] and packl[] and set npa to > 0
 * 
 *  mac_header_skip
 *  ---------------
 *  The number of bytes of the source_buf that are skipped over before
 *  authentication begins.  This must be a number between 0 and 2^16-1
 *  and can be used by IPsec implementers to skip over IP headers.
 *  *** Value ignored if authentication not used ***
 *
 *  crypt_header_skip
 *  -----------------
 *  The number of bytes of the source_buf that are skipped over before
 *  the cryptographic operation begins.  This must be a number between 0
 *  and 2^16-1.  For IPsec, this number will always be 8 bytes larger
 *  than the auth_header_skip (to skip over the ESP header).
 *  *** Value ignored if cryptography not used ***
 *
 */
struct hifn_operand {
	union {
		struct sk_buff *skb;
		struct uio *io;
		unsigned char *buf;
	} u;
	void		*map;
	bus_size_t	mapsize;
	int		nsegs;
	struct {
	    dma_addr_t  ds_addr;
	    int         ds_len;
	} segs[MAX_SCATTER];
};

struct hifn_command {
	u_int16_t session_num;
	u_int16_t base_masks, cry_masks, mac_masks;
	u_int8_t iv[HIFN_MAX_IV_LENGTH], *ck, mac[HIFN_MAC_KEY_LENGTH];
	int cklen;
	int sloplen, slopidx;

	struct hifn_operand src;
	struct hifn_operand dst;

	struct hifn_softc *softc;
	struct cryptop *crp;
	struct cryptodesc *enccrd, *maccrd;
};

#define	src_skb		src.u.skb
#define	src_io		src.u.io
#define	src_map		src.map
#define	src_mapsize	src.mapsize
#define	src_segs	src.segs
#define	src_nsegs	src.nsegs
#define	src_buf		src.u.buf

#define	dst_skb		dst.u.skb
#define	dst_io		dst.u.io
#define	dst_map		dst.map
#define	dst_mapsize	dst.mapsize
#define	dst_segs	dst.segs
#define	dst_nsegs	dst.nsegs
#define	dst_buf		dst.u.buf

/*
 *  Return values for hifn_crypto()
 */
#define HIFN_CRYPTO_SUCCESS	0
#define HIFN_CRYPTO_BAD_INPUT	(-1)
#define HIFN_CRYPTO_RINGS_FULL	(-2)

/**************************************************************************
 *
 *  Function:  hifn_crypto
 *
 *  Purpose:   Called by external drivers to begin an encryption on the
 *             HIFN board.
 *
 *  Blocking/Non-blocking Issues
 *  ============================
 *  The driver cannot block in hifn_crypto (no calls to tsleep) currently.
 *  hifn_crypto() returns HIFN_CRYPTO_RINGS_FULL if there is not enough
 *  room in any of the rings for the request to proceed.
 *
 *  Return Values
 *  =============
 *  0 for success, negative values on error
 *
 *  Defines for negative error codes are:
 *  
 *    HIFN_CRYPTO_BAD_INPUT  :  The passed in command had invalid settings.
 *    HIFN_CRYPTO_RINGS_FULL :  All DMA rings were full and non-blocking
 *                              behaviour was requested.
 *
 *************************************************************************/

/*
 * Convert back and forth from 'sid' to 'card' and 'session'
 */
#define HIFN_CARD(sid)		(((sid) & 0xf0000000) >> 28)
#define HIFN_SESSION(sid)	((sid) & 0x000007ff)
#define HIFN_SID(crd,ses)	(((crd) << 28) | ((ses) & 0x7ff))

#endif /* _KERNEL */

struct hifn_stats {
	u_int64_t hst_ibytes;
	u_int64_t hst_obytes;
	u_int32_t hst_ipackets;
	u_int32_t hst_opackets;
	u_int32_t hst_invalid;
	u_int32_t hst_nomem;		/* malloc or one of hst_nomem_* */
	u_int32_t hst_abort;
	u_int32_t hst_noirq;		/* IRQ for no reason */
	u_int32_t hst_totbatch;		/* ops submitted w/o interrupt */
	u_int32_t hst_maxbatch;		/* max ops submitted together */
	u_int32_t hst_unaligned;	/* unaligned src caused copy */
	/*
	 * The following divides hst_nomem into more specific buckets.
	 */
	u_int32_t hst_nomem_map;	/* bus_dmamap_create failed */
	u_int32_t hst_nomem_load;	/* bus_dmamap_load_* failed */
	u_int32_t hst_nomem_mbuf;	/* MGET* failed */
	u_int32_t hst_nomem_mcl;	/* MCLGET* failed */
	u_int32_t hst_nomem_cr;		/* out of command/result descriptor */
	u_int32_t hst_nomem_sd;		/* out of src/dst descriptors */
};

#endif /* __HIFN7751VAR_H__ */