/*      $NetBSD: via_padlock.h,v 1.10 2020/06/29 23:38:02 riastradh Exp $       */

/*-
 * Copyright (c) 2003 Jason Wright
 * Copyright (c) 2003, 2004 Theo de Raadt
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _X86_VIA_PADLOCK_H_
#define _X86_VIA_PADLOCK_H_

#if defined(_KERNEL)

#include <sys/rndsource.h>
#include <sys/callout.h>

#include <crypto/aes/aes.h>

/* VIA C3 xcrypt-* instruction context control options */
#define C3_CRYPT_CWLO_ROUND_M           0x0000000f
#define C3_CRYPT_CWLO_ALG_M             0x00000070
#define C3_CRYPT_CWLO_ALG_AES           0x00000000
#define C3_CRYPT_CWLO_KEYGEN_M          0x00000080
#define C3_CRYPT_CWLO_KEYGEN_HW         0x00000000
#define C3_CRYPT_CWLO_KEYGEN_SW         0x00000080
#define C3_CRYPT_CWLO_NORMAL            0x00000000
#define C3_CRYPT_CWLO_INTERMEDIATE      0x00000100
#define C3_CRYPT_CWLO_ENCRYPT           0x00000000
#define C3_CRYPT_CWLO_DECRYPT           0x00000200
#define C3_CRYPT_CWLO_KEY128            0x0000000a      /* 128bit, 10 rds */
#define C3_CRYPT_CWLO_KEY192            0x0000040c      /* 192bit, 12 rds */
#define C3_CRYPT_CWLO_KEY256            0x0000080e      /* 256bit, 15 rds */

struct via_padlock_session {
        uint32_t        ses_ekey[4*(AES_256_NROUNDS + 1)];
        uint32_t        ses_dkey[4*(AES_256_NROUNDS + 1)];
        uint32_t        ses_cw0;
        struct swcr_data        *swd;
        int     ses_klen;
        int     ses_used;
};

struct via_padlock_softc {
        device_t        sc_dev;

        uint32_t        op_cw[4];       /* 128 bit aligned */
        uint8_t op_iv[16];      /* 128 bit aligned */
        void            *op_buf;

        /* normal softc stuff */
        int32_t         sc_cid;
        bool            sc_cid_attached;
        int             sc_nsessions;
        struct via_padlock_session *sc_sessions;
};

#define VIAC3_SESSION(sid)      ((sid) & 0x0fffffff)
#define VIAC3_SID(crd,ses)      (((crd) << 28) | ((ses) & 0x0fffffff))

#endif /* _KERNEL */

#if defined(_KERNEL) || defined(_KMEMUSER)
struct cpu_info;

struct via_padlock {
        struct cpu_info         *vp_ci;
        int                     vp_freq;
};

#endif /* _KERNEL || _KMEMUSER */
#endif /* _X86_VIA_PADLOCK_H_ */