target/linux/generic-2.6/files/crypto/ocf/safe/safevar.h

   1 /*-
   2  * The linux port of this code done by David McCullough
   3  * Copyright (C) 2004-2010 David McCullough <david_mccullough@mcafee.com>
   4  * The license and original author are listed below.
   5  *
   6  * Copyright (c) 2003 Sam Leffler, Errno Consulting
   7  * Copyright (c) 2003 Global Technology Associates, Inc.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: src/sys/dev/safe/safevar.h,v 1.2 2006/05/17 18:34:26 pjd Exp $
  32  */
  33 #ifndef _SAFE_SAFEVAR_H_
  34 #define _SAFE_SAFEVAR_H_
  35
  36 /* Maximum queue length */
  37 #ifndef SAFE_MAX_NQUEUE
  38 #define SAFE_MAX_NQUEUE 60
  39 #endif
  40
  41 #define SAFE_MAX_PART           64      /* Maximum scatter/gather depth */
  42 #define SAFE_DMA_BOUNDARY       0       /* No boundary for source DMA ops */
  43 #define SAFE_MAX_DSIZE          2048 /* MCLBYTES Fixed scatter particle size */
  44 #define SAFE_MAX_SSIZE          0x0ffff /* Maximum gather particle size */
  45 #define SAFE_MAX_DMA            0xfffff /* Maximum PE operand size (20 bits) */
  46 /* total src+dst particle descriptors */
  47 #define SAFE_TOTAL_DPART        (SAFE_MAX_NQUEUE * SAFE_MAX_PART)
  48 #define SAFE_TOTAL_SPART        (SAFE_MAX_NQUEUE * SAFE_MAX_PART)
  49
  50 #define SAFE_RNG_MAXBUFSIZ      128     /* 32-bit words */
  51
  52 #define SAFE_CARD(sid)          (((sid) & 0xf0000000) >> 28)
  53 #define SAFE_SESSION(sid)       ( (sid) & 0x0fffffff)
  54 #define SAFE_SID(crd, sesn)     (((crd) << 28) | ((sesn) & 0x0fffffff))
  55
  56 #define SAFE_DEF_RTY            0xff    /* PCI Retry Timeout */
  57 #define SAFE_DEF_TOUT           0xff    /* PCI TRDY Timeout */
  58 #define SAFE_DEF_CACHELINE      0x01    /* Cache Line setting */
  59
  60 #ifdef __KERNEL__
  61 /*
  62  * State associated with the allocation of each chunk
  63  * of memory setup for DMA.
  64  */
  65 struct safe_dma_alloc {
  66         dma_addr_t              dma_paddr;
  67         void                    *dma_vaddr;
  68 };
  69
  70 /*
  71  * Cryptographic operand state.  One of these exists for each
  72  * source and destination operand passed in from the crypto
  73  * subsystem.  When possible source and destination operands
  74  * refer to the same memory.  More often they are distinct.
  75  * We track the virtual address of each operand as well as
  76  * where each is mapped for DMA.
  77  */
  78 struct safe_operand {
  79         union {
  80                 struct sk_buff *skb;
  81                 struct uio *io;
  82         } u;
  83         void                    *map;
  84         int                             mapsize;        /* total number of bytes in segs */
  85         struct {
  86                 dma_addr_t      ds_addr;
  87                 int                     ds_len;
  88                 int                     ds_tlen;
  89         } segs[SAFE_MAX_PART];
  90         int                             nsegs;
  91 };
  92
  93 /*
  94  * Packet engine ring entry and cryptographic operation state.
  95  * The packet engine requires a ring of descriptors that contain
  96  * pointers to various cryptographic state.  However the ring
  97  * configuration register allows you to specify an arbitrary size
  98  * for ring entries.  We use this feature to collect most of the
  99  * state for each cryptographic request into one spot.  Other than
 100  * ring entries only the ``particle descriptors'' (scatter/gather
 101  * lists) and the actual operand data are kept separate.  The
 102  * particle descriptors must also be organized in rings.  The
 103  * operand data can be located aribtrarily (modulo alignment constraints).
 104  *
 105  * Note that the descriptor ring is mapped onto the PCI bus so
 106  * the hardware can DMA data.  This means the entire ring must be
 107  * contiguous.
 108  */
 109 struct safe_ringentry {
 110         struct safe_desc        re_desc;        /* command descriptor */
 111         struct safe_sarec       re_sa;          /* SA record */
 112         struct safe_sastate     re_sastate;     /* SA state record */
 113
 114         struct cryptop          *re_crp;        /* crypto operation */
 115
 116         struct safe_operand     re_src;         /* source operand */
 117         struct safe_operand     re_dst;         /* destination operand */
 118
 119         int                     re_sesn;        /* crypto session ID */
 120         int                     re_flags;
 121 #define SAFE_QFLAGS_COPYOUTIV   0x1             /* copy back on completion */
 122 #define SAFE_QFLAGS_COPYOUTICV  0x2             /* copy back on completion */
 123 };
 124
 125 #define re_src_skb      re_src.u.skb
 126 #define re_src_io       re_src.u.io
 127 #define re_src_map      re_src.map
 128 #define re_src_nsegs    re_src.nsegs
 129 #define re_src_segs     re_src.segs
 130 #define re_src_mapsize  re_src.mapsize
 131
 132 #define re_dst_skb      re_dst.u.skb
 133 #define re_dst_io       re_dst.u.io
 134 #define re_dst_map      re_dst.map
 135 #define re_dst_nsegs    re_dst.nsegs
 136 #define re_dst_segs     re_dst.segs
 137 #define re_dst_mapsize  re_dst.mapsize
 138
 139 struct rndstate_test;
 140
 141 struct safe_session {
 142         u_int32_t       ses_used;
 143         u_int32_t       ses_klen;               /* key length in bits */
 144         u_int32_t       ses_key[8];             /* DES/3DES/AES key */
 145         u_int32_t       ses_mlen;               /* hmac length in bytes */
 146         u_int32_t       ses_hminner[5];         /* hmac inner state */
 147         u_int32_t       ses_hmouter[5];         /* hmac outer state */
 148         u_int32_t       ses_iv[4];              /* DES/3DES/AES iv */
 149 };
 150
 151 struct safe_pkq {
 152         struct list_head        pkq_list;
 153         struct cryptkop         *pkq_krp;
 154 };
 155
 156 struct safe_softc {
 157         softc_device_decl       sc_dev;
 158         u32                     sc_irq;
 159
 160         struct pci_dev          *sc_pcidev;
 161         ocf_iomem_t             sc_base_addr;
 162
 163         u_int                   sc_chiprev;     /* major/minor chip revision */
 164         int                     sc_flags;       /* device specific flags */
 165 #define SAFE_FLAGS_KEY          0x01            /* has key accelerator */
 166 #define SAFE_FLAGS_RNG          0x02            /* hardware rng */
 167         int                     sc_suspended;
 168         int                     sc_needwakeup;  /* notify crypto layer */
 169         int32_t                 sc_cid;         /* crypto tag */
 170
 171         struct safe_dma_alloc   sc_ringalloc;   /* PE ring allocation state */
 172         struct safe_ringentry   *sc_ring;       /* PE ring */
 173         struct safe_ringentry   *sc_ringtop;    /* PE ring top */
 174         struct safe_ringentry   *sc_front;      /* next free entry */
 175         struct safe_ringentry   *sc_back;       /* next pending entry */
 176         int                     sc_nqchip;      /* # passed to chip */
 177         spinlock_t              sc_ringmtx;     /* PE ring lock */
 178         struct safe_pdesc       *sc_spring;     /* src particle ring */
 179         struct safe_pdesc       *sc_springtop;  /* src particle ring top */
 180         struct safe_pdesc       *sc_spfree;     /* next free src particle */
 181         struct safe_dma_alloc   sc_spalloc;     /* src particle ring state */
 182         struct safe_pdesc       *sc_dpring;     /* dest particle ring */
 183         struct safe_pdesc       *sc_dpringtop;  /* dest particle ring top */
 184         struct safe_pdesc       *sc_dpfree;     /* next free dest particle */
 185         struct safe_dma_alloc   sc_dpalloc;     /* dst particle ring state */
 186         int                     sc_nsessions;   /* # of sessions */
 187         struct safe_session     *sc_sessions;   /* sessions */
 188
 189         struct timer_list       sc_pkto;        /* PK polling */
 190         spinlock_t              sc_pkmtx;       /* PK lock */
 191         struct list_head        sc_pkq;         /* queue of PK requests */
 192         struct safe_pkq         *sc_pkq_cur;    /* current processing request */
 193         u_int32_t               sc_pk_reslen, sc_pk_resoff;
 194
 195         int                     sc_max_dsize;   /* maximum safe DMA size */
 196 };
 197 #endif /* __KERNEL__ */
 198
 199 struct safe_stats {
 200         u_int64_t st_ibytes;
 201         u_int64_t st_obytes;
 202         u_int32_t st_ipackets;
 203         u_int32_t st_opackets;
 204         u_int32_t st_invalid;           /* invalid argument */
 205         u_int32_t st_badsession;        /* invalid session id */
 206         u_int32_t st_badflags;          /* flags indicate !(mbuf | uio) */
 207         u_int32_t st_nodesc;            /* op submitted w/o descriptors */
 208         u_int32_t st_badalg;            /* unsupported algorithm */
 209         u_int32_t st_ringfull;          /* PE descriptor ring full */
 210         u_int32_t st_peoperr;           /* PE marked error */
 211         u_int32_t st_dmaerr;            /* PE DMA error */
 212         u_int32_t st_bypasstoobig;      /* bypass > 96 bytes */
 213         u_int32_t st_skipmismatch;      /* enc part begins before auth part */
 214         u_int32_t st_lenmismatch;       /* enc length different auth length */
 215         u_int32_t st_coffmisaligned;    /* crypto offset not 32-bit aligned */
 216         u_int32_t st_cofftoobig;        /* crypto offset > 255 words */
 217         u_int32_t st_iovmisaligned;     /* iov op not aligned */
 218         u_int32_t st_iovnotuniform;     /* iov op not suitable */
 219         u_int32_t st_unaligned;         /* unaligned src caused copy */
 220         u_int32_t st_notuniform;        /* non-uniform src caused copy */
 221         u_int32_t st_nomap;             /* bus_dmamap_create failed */
 222         u_int32_t st_noload;            /* bus_dmamap_load_* failed */
 223         u_int32_t st_nombuf;            /* MGET* failed */
 224         u_int32_t st_nomcl;             /* MCLGET* failed */
 225         u_int32_t st_maxqchip;          /* max mcr1 ops out for processing */
 226         u_int32_t st_rng;               /* RNG requests */
 227         u_int32_t st_rngalarm;          /* RNG alarm requests */
 228         u_int32_t st_noicvcopy;         /* ICV data copies suppressed */
 229 };
 230 #endif /* _SAFE_SAFEVAR_H_ */