target/linux/generic-2.6/files/crypto/ocf/hifn/hifn7751var.h

   1 /* $FreeBSD: src/sys/dev/hifn/hifn7751var.h,v 1.9 2007/03/21 03:42:49 sam Exp $ */
   2 /*      $OpenBSD: hifn7751var.h,v 1.42 2002/04/08 17:49:42 jason Exp $  */
   3
   4 /*-
   5  * Invertex AEON / Hifn 7751 driver
   6  * Copyright (c) 1999 Invertex Inc. All rights reserved.
   7  * Copyright (c) 1999 Theo de Raadt
   8  * Copyright (c) 2000-2001 Network Security Technologies, Inc.
   9  *                      http://www.netsec.net
  10  *
  11  * Please send any comments, feedback, bug-fixes, or feature requests to
  12  * software@invertex.com.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  *
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  * 3. The name of the author may not be used to endorse or promote products
  24  *    derived from this software without specific prior written permission.
  25  *
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  28  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  29  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  30  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  31  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  32  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  33  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  34  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  36  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  *
  38  * Effort sponsored in part by the Defense Advanced Research Projects
  39  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  40  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
  41  *
  42  */
  43
  44 #ifndef __HIFN7751VAR_H__
  45 #define __HIFN7751VAR_H__
  46
  47 #ifdef __KERNEL__
  48
  49 /*
  50  * Some configurable values for the driver.  By default command+result
  51  * descriptor rings are the same size.  The src+dst descriptor rings
  52  * are sized at 3.5x the number of potential commands.  Slower parts
  53  * (e.g. 7951) tend to run out of src descriptors; faster parts (7811)
  54  * src+cmd/result descriptors.  It's not clear that increasing the size
  55  * of the descriptor rings helps performance significantly as other
  56  * factors tend to come into play (e.g. copying misaligned packets).
  57  */
  58 #define HIFN_D_CMD_RSIZE        24      /* command descriptors */
  59 #define HIFN_D_SRC_RSIZE        ((HIFN_D_CMD_RSIZE * 7) / 2)    /* source descriptors */
  60 #define HIFN_D_RES_RSIZE        HIFN_D_CMD_RSIZE        /* result descriptors */
  61 #define HIFN_D_DST_RSIZE        HIFN_D_SRC_RSIZE        /* destination descriptors */
  62
  63 /*
  64  *  Length values for cryptography
  65  */
  66 #define HIFN_DES_KEY_LENGTH             8
  67 #define HIFN_3DES_KEY_LENGTH            24
  68 #define HIFN_MAX_CRYPT_KEY_LENGTH       HIFN_3DES_KEY_LENGTH
  69 #define HIFN_IV_LENGTH                  8
  70 #define HIFN_AES_IV_LENGTH              16
  71 #define HIFN_MAX_IV_LENGTH              HIFN_AES_IV_LENGTH
  72
  73 /*
  74  *  Length values for authentication
  75  */
  76 #define HIFN_MAC_KEY_LENGTH             64
  77 #define HIFN_MD5_LENGTH                 16
  78 #define HIFN_SHA1_LENGTH                20
  79 #define HIFN_MAC_TRUNC_LENGTH           12
  80
  81 #define MAX_SCATTER 64
  82
  83 /*
  84  * Data structure to hold all 4 rings and any other ring related data.
  85  */
  86 struct hifn_dma {
  87         /*
  88          *  Descriptor rings.  We add +1 to the size to accomidate the
  89          *  jump descriptor.
  90          */
  91         struct hifn_desc        cmdr[HIFN_D_CMD_RSIZE+1];
  92         struct hifn_desc        srcr[HIFN_D_SRC_RSIZE+1];
  93         struct hifn_desc        dstr[HIFN_D_DST_RSIZE+1];
  94         struct hifn_desc        resr[HIFN_D_RES_RSIZE+1];
  95
  96         struct hifn_command     *hifn_commands[HIFN_D_RES_RSIZE];
  97
  98         u_char                  command_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_COMMAND];
  99         u_char                  result_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_RESULT];
 100         u_int32_t               slop[HIFN_D_CMD_RSIZE];
 101
 102         u_int64_t               test_src, test_dst;
 103
 104         /*
 105          *  Our current positions for insertion and removal from the desriptor
 106          *  rings.
 107          */
 108         int                     cmdi, srci, dsti, resi;
 109         volatile int            cmdu, srcu, dstu, resu;
 110         int                     cmdk, srck, dstk, resk;
 111 };
 112
 113 struct hifn_session {
 114         int hs_used;
 115         int hs_mlen;
 116         u_int8_t hs_iv[HIFN_MAX_IV_LENGTH];
 117 };
 118
 119 #define HIFN_RING_SYNC(sc, r, i, f)                                     \
 120         /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
 121
 122 #define HIFN_CMDR_SYNC(sc, i, f)        HIFN_RING_SYNC((sc), cmdr, (i), (f))
 123 #define HIFN_RESR_SYNC(sc, i, f)        HIFN_RING_SYNC((sc), resr, (i), (f))
 124 #define HIFN_SRCR_SYNC(sc, i, f)        HIFN_RING_SYNC((sc), srcr, (i), (f))
 125 #define HIFN_DSTR_SYNC(sc, i, f)        HIFN_RING_SYNC((sc), dstr, (i), (f))
 126
 127 #define HIFN_CMD_SYNC(sc, i, f)                                         \
 128         /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
 129
 130 #define HIFN_RES_SYNC(sc, i, f)                                         \
 131         /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
 132
 133 typedef int bus_size_t;
 134
 135 /*
 136  * Holds data specific to a single HIFN board.
 137  */
 138 struct hifn_softc {
 139         softc_device_decl                sc_dev;
 140
 141         struct pci_dev          *sc_pcidev;     /* PCI device pointer */
 142         spinlock_t              sc_mtx;         /* per-instance lock */
 143
 144         int                     sc_num;         /* for multiple devs */
 145
 146         ocf_iomem_t             sc_bar0;
 147         bus_size_t              sc_bar0_lastreg;/* bar0 last reg written */
 148         ocf_iomem_t             sc_bar1;
 149         bus_size_t              sc_bar1_lastreg;/* bar1 last reg written */
 150
 151         int                     sc_irq;
 152
 153         u_int32_t               sc_dmaier;
 154         u_int32_t               sc_drammodel;   /* 1=dram, 0=sram */
 155         u_int32_t               sc_pllconfig;   /* 7954/7955/7956 PLL config */
 156
 157         struct hifn_dma         *sc_dma;
 158         dma_addr_t              sc_dma_physaddr;/* physical address of sc_dma */
 159
 160         int                     sc_dmansegs;
 161         int32_t                 sc_cid;
 162         int                     sc_maxses;
 163         int                     sc_nsessions;
 164         struct hifn_session     *sc_sessions;
 165         int                     sc_ramsize;
 166         int                     sc_flags;
 167 #define HIFN_HAS_RNG            0x1     /* includes random number generator */
 168 #define HIFN_HAS_PUBLIC         0x2     /* includes public key support */
 169 #define HIFN_HAS_AES            0x4     /* includes AES support */
 170 #define HIFN_IS_7811            0x8     /* Hifn 7811 part */
 171 #define HIFN_IS_7956            0x10    /* Hifn 7956/7955 don't have SDRAM */
 172
 173         struct timer_list       sc_tickto;      /* for managing DMA */
 174
 175         int                     sc_rngfirst;
 176         int                     sc_rnghz;       /* RNG polling frequency */
 177
 178         int                     sc_c_busy;      /* command ring busy */
 179         int                     sc_s_busy;      /* source data ring busy */
 180         int                     sc_d_busy;      /* destination data ring busy */
 181         int                     sc_r_busy;      /* result ring busy */
 182         int                     sc_active;      /* for initial countdown */
 183         int                     sc_needwakeup;  /* ops q'd wating on resources */
 184         int                     sc_curbatch;    /* # ops submitted w/o int */
 185         int                     sc_suspended;
 186 #ifdef HIFN_VULCANDEV
 187         struct cdev            *sc_pkdev;
 188 #endif
 189 };
 190
 191 #define HIFN_LOCK(_sc)          spin_lock_irqsave(&(_sc)->sc_mtx, l_flags)
 192 #define HIFN_UNLOCK(_sc)        spin_unlock_irqrestore(&(_sc)->sc_mtx, l_flags)
 193
 194 /*
 195  *  hifn_command_t
 196  *
 197  *  This is the control structure used to pass commands to hifn_encrypt().
 198  *
 199  *  flags
 200  *  -----
 201  *  Flags is the bitwise "or" values for command configuration.  A single
 202  *  encrypt direction needs to be set:
 203  *
 204  *      HIFN_ENCODE or HIFN_DECODE
 205  *
 206  *  To use cryptography, a single crypto algorithm must be included:
 207  *
 208  *      HIFN_CRYPT_3DES or HIFN_CRYPT_DES
 209  *
 210  *  To use authentication is used, a single MAC algorithm must be included:
 211  *
 212  *      HIFN_MAC_MD5 or HIFN_MAC_SHA1
 213  *
 214  *  By default MD5 uses a 16 byte hash and SHA-1 uses a 20 byte hash.
 215  *  If the value below is set, hash values are truncated or assumed
 216  *  truncated to 12 bytes:
 217  *
 218  *      HIFN_MAC_TRUNC
 219  *
 220  *  Keys for encryption and authentication can be sent as part of a command,
 221  *  or the last key value used with a particular session can be retrieved
 222  *  and used again if either of these flags are not specified.
 223  *
 224  *      HIFN_CRYPT_NEW_KEY, HIFN_MAC_NEW_KEY
 225  *
 226  *  session_num
 227  *  -----------
 228  *  A number between 0 and 2048 (for DRAM models) or a number between
 229  *  0 and 768 (for SRAM models).  Those who don't want to use session
 230  *  numbers should leave value at zero and send a new crypt key and/or
 231  *  new MAC key on every command.  If you use session numbers and
 232  *  don't send a key with a command, the last key sent for that same
 233  *  session number will be used.
 234  *
 235  *  Warning:  Using session numbers and multiboard at the same time
 236  *            is currently broken.
 237  *
 238  *  mbuf
 239  *  ----
 240  *  Either fill in the mbuf pointer and npa=0 or
 241  *       fill packp[] and packl[] and set npa to > 0
 242  *
 243  *  mac_header_skip
 244  *  ---------------
 245  *  The number of bytes of the source_buf that are skipped over before
 246  *  authentication begins.  This must be a number between 0 and 2^16-1
 247  *  and can be used by IPsec implementers to skip over IP headers.
 248  *  *** Value ignored if authentication not used ***
 249  *
 250  *  crypt_header_skip
 251  *  -----------------
 252  *  The number of bytes of the source_buf that are skipped over before
 253  *  the cryptographic operation begins.  This must be a number between 0
 254  *  and 2^16-1.  For IPsec, this number will always be 8 bytes larger
 255  *  than the auth_header_skip (to skip over the ESP header).
 256  *  *** Value ignored if cryptography not used ***
 257  *
 258  */
 259 struct hifn_operand {
 260         union {
 261                 struct sk_buff *skb;
 262                 struct uio *io;
 263                 unsigned char *buf;
 264         } u;
 265         void            *map;
 266         bus_size_t      mapsize;
 267         int             nsegs;
 268         struct {
 269             dma_addr_t  ds_addr;
 270             int         ds_len;
 271         } segs[MAX_SCATTER];
 272 };
 273
 274 struct hifn_command {
 275         u_int16_t session_num;
 276         u_int16_t base_masks, cry_masks, mac_masks;
 277         u_int8_t iv[HIFN_MAX_IV_LENGTH], *ck, mac[HIFN_MAC_KEY_LENGTH];
 278         int cklen;
 279         int sloplen, slopidx;
 280
 281         struct hifn_operand src;
 282         struct hifn_operand dst;
 283
 284         struct hifn_softc *softc;
 285         struct cryptop *crp;
 286         struct cryptodesc *enccrd, *maccrd;
 287 };
 288
 289 #define src_skb         src.u.skb
 290 #define src_io          src.u.io
 291 #define src_map         src.map
 292 #define src_mapsize     src.mapsize
 293 #define src_segs        src.segs
 294 #define src_nsegs       src.nsegs
 295 #define src_buf         src.u.buf
 296
 297 #define dst_skb         dst.u.skb
 298 #define dst_io          dst.u.io
 299 #define dst_map         dst.map
 300 #define dst_mapsize     dst.mapsize
 301 #define dst_segs        dst.segs
 302 #define dst_nsegs       dst.nsegs
 303 #define dst_buf         dst.u.buf
 304
 305 /*
 306  *  Return values for hifn_crypto()
 307  */
 308 #define HIFN_CRYPTO_SUCCESS     0
 309 #define HIFN_CRYPTO_BAD_INPUT   (-1)
 310 #define HIFN_CRYPTO_RINGS_FULL  (-2)
 311
 312 /**************************************************************************
 313  *
 314  *  Function:  hifn_crypto
 315  *
 316  *  Purpose:   Called by external drivers to begin an encryption on the
 317  *             HIFN board.
 318  *
 319  *  Blocking/Non-blocking Issues
 320  *  ============================
 321  *  The driver cannot block in hifn_crypto (no calls to tsleep) currently.
 322  *  hifn_crypto() returns HIFN_CRYPTO_RINGS_FULL if there is not enough
 323  *  room in any of the rings for the request to proceed.
 324  *
 325  *  Return Values
 326  *  =============
 327  *  0 for success, negative values on error
 328  *
 329  *  Defines for negative error codes are:
 330  *
 331  *    HIFN_CRYPTO_BAD_INPUT  :  The passed in command had invalid settings.
 332  *    HIFN_CRYPTO_RINGS_FULL :  All DMA rings were full and non-blocking
 333  *                              behaviour was requested.
 334  *
 335  *************************************************************************/
 336
 337 /*
 338  * Convert back and forth from 'sid' to 'card' and 'session'
 339  */
 340 #define HIFN_CARD(sid)          (((sid) & 0xf0000000) >> 28)
 341 #define HIFN_SESSION(sid)       ((sid) & 0x000007ff)
 342 #define HIFN_SID(crd,ses)       (((crd) << 28) | ((ses) & 0x7ff))
 343
 344 #endif /* _KERNEL */
 345
 346 struct hifn_stats {
 347         u_int64_t hst_ibytes;
 348         u_int64_t hst_obytes;
 349         u_int32_t hst_ipackets;
 350         u_int32_t hst_opackets;
 351         u_int32_t hst_invalid;
 352         u_int32_t hst_nomem;            /* malloc or one of hst_nomem_* */
 353         u_int32_t hst_abort;
 354         u_int32_t hst_noirq;            /* IRQ for no reason */
 355         u_int32_t hst_totbatch;         /* ops submitted w/o interrupt */
 356         u_int32_t hst_maxbatch;         /* max ops submitted together */
 357         u_int32_t hst_unaligned;        /* unaligned src caused copy */
 358         /*
 359          * The following divides hst_nomem into more specific buckets.
 360          */
 361         u_int32_t hst_nomem_map;        /* bus_dmamap_create failed */
 362         u_int32_t hst_nomem_load;       /* bus_dmamap_load_* failed */
 363         u_int32_t hst_nomem_mbuf;       /* MGET* failed */
 364         u_int32_t hst_nomem_mcl;        /* MCLGET* failed */
 365         u_int32_t hst_nomem_cr;         /* out of command/result descriptor */
 366         u_int32_t hst_nomem_sd;         /* out of src/dst descriptors */
 367 };
 368
 369 #endif /* __HIFN7751VAR_H__ */