drivers/staging/brcm80211/brcmsmac/wlc_key.h

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _wlc_key_h_
  18 #define _wlc_key_h_
  19
  20 struct scb;
  21 struct wlc_info;
  22 struct wlc_bsscfg;
  23 /* Maximum # of keys that wl driver supports in S/W.
  24  * Keys supported in H/W is less than or equal to WSEC_MAX_KEYS.
  25  */
  26 #define WSEC_MAX_KEYS           54      /* Max # of keys (50 + 4 default keys) */
  27 #define WLC_DEFAULT_KEYS        4       /* Default # of keys */
  28
  29 #define WSEC_MAX_WOWL_KEYS 5    /* Max keys in WOWL mode (1 + 4 default keys) */
  30
  31 #define WPA2_GTK_MAX    3
  32
  33 /*
  34 * Max # of keys currently supported:
  35 *
  36 *     s/w keys if WSEC_SW(wlc->wsec).
  37 *     h/w keys otherwise.
  38 */
  39 #define WLC_MAX_WSEC_KEYS(wlc) WSEC_MAX_KEYS
  40
  41 /* number of 802.11 default (non-paired, group keys) */
  42 #define WSEC_MAX_DEFAULT_KEYS   4       /* # of default keys */
  43
  44 /* Max # of hardware keys supported */
  45 #define WLC_MAX_WSEC_HW_KEYS(wlc) WSEC_MAX_RCMTA_KEYS
  46
  47 /* Max # of hardware TKIP MIC keys supported */
  48 #define WLC_MAX_TKMIC_HW_KEYS(wlc) ((D11REV_GE((wlc)->pub->corerev, 13)) ? \
  49                 WSEC_MAX_TKMIC_ENGINE_KEYS : 0)
  50
  51 #define WSEC_HW_TKMIC_KEY(wlc, key, bsscfg) \
  52         (((D11REV_GE((wlc)->pub->corerev, 13)) && ((wlc)->machwcap & MCAP_TKIPMIC)) && \
  53          (key) && ((key)->algo == CRYPTO_ALGO_TKIP) && \
  54          !WSEC_SOFTKEY(wlc, key, bsscfg) && \
  55         WSEC_KEY_INDEX(wlc, key) >= WLC_DEFAULT_KEYS && \
  56         (WSEC_KEY_INDEX(wlc, key) < WSEC_MAX_TKMIC_ENGINE_KEYS))
  57
  58 /* index of key in key table */
  59 #define WSEC_KEY_INDEX(wlc, key)        ((key)->idx)
  60
  61 #define WSEC_SOFTKEY(wlc, key, bsscfg) (WLC_SW_KEYS(wlc, bsscfg) || \
  62         WSEC_KEY_INDEX(wlc, key) >= WLC_MAX_WSEC_HW_KEYS(wlc))
  63
  64 /* get a key, non-NULL only if key allocated and not clear */
  65 #define WSEC_KEY(wlc, i)        (((wlc)->wsec_keys[i] && (wlc)->wsec_keys[i]->len) ? \
  66         (wlc)->wsec_keys[i] : NULL)
  67
  68 #define WSEC_SCB_KEY_VALID(scb) (((scb)->key && (scb)->key->len) ? true : false)
  69
  70 /* default key */
  71 #define WSEC_BSS_DEFAULT_KEY(bsscfg) (((bsscfg)->wsec_index == -1) ? \
  72         (struct wsec_key *)NULL:(bsscfg)->bss_def_keys[(bsscfg)->wsec_index])
  73
  74 /* Macros for key management in IBSS mode */
  75 #define WSEC_IBSS_MAX_PEERS     16      /* Max # of IBSS Peers */
  76 #define WSEC_IBSS_RCMTA_INDEX(idx) \
  77         (((idx - WSEC_MAX_DEFAULT_KEYS) % WSEC_IBSS_MAX_PEERS) + WSEC_MAX_DEFAULT_KEYS)
  78
  79 /* contiguous # key slots for infrastructure mode STA */
  80 #define WSEC_BSS_STA_KEY_GROUP_SIZE     5
  81
  82 typedef struct wsec_iv {
  83         u32 hi;         /* upper 32 bits of IV */
  84         u16 lo;         /* lower 16 bits of IV */
  85 } wsec_iv_t;
  86
  87 #define WLC_NUMRXIVS    16      /* # rx IVs (one per 802.11e TID) */
  88
  89 typedef struct wsec_key {
  90         u8 ea[ETH_ALEN];        /* per station */
  91         u8 idx;         /* key index in wsec_keys array */
  92         u8 id;          /* key ID [0-3] */
  93         u8 algo;                /* CRYPTO_ALGO_AES_CCM, CRYPTO_ALGO_WEP128, etc */
  94         u8 rcmta;               /* rcmta entry index, same as idx by default */
  95         u16 flags;              /* misc flags */
  96         u8 algo_hw;             /* cache for hw register */
  97         u8 aes_mode;            /* cache for hw register */
  98         s8 iv_len;              /* IV length */
  99         s8 icv_len;             /* ICV length */
 100         u32 len;                /* key length..don't move this var */
 101         /* data is 4byte aligned */
 102         u8 data[DOT11_MAX_KEY_SIZE];    /* key data */
 103         wsec_iv_t rxiv[WLC_NUMRXIVS];   /* Rx IV (one per TID) */
 104         wsec_iv_t txiv;         /* Tx IV */
 105
 106 } wsec_key_t;
 107
 108 #define broken_roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
 109
 110 /* For use with wsec_key_t.flags */
 111
 112 #define WSEC_BS_UPDATE          (1 << 0)        /* Indicates hw needs key update on BS switch */
 113 #define WSEC_PRIMARY_KEY        (1 << 1)        /* Indicates this key is the primary (ie tx) key */
 114 #define WSEC_TKIP_ERROR         (1 << 2)        /* Provoke deliberate MIC error */
 115 #define WSEC_REPLAY_ERROR       (1 << 3)        /* Provoke deliberate replay */
 116 #define WSEC_IBSS_PEER_GROUP_KEY        (1 << 7)        /* Flag: group key for a IBSS PEER */
 117 #define WSEC_ICV_ERROR          (1 << 8)        /* Provoke deliberate ICV error */
 118
 119 #define wlc_key_insert(a, b, c, d, e, f, g, h, i, j) (BCME_ERROR)
 120 #define wlc_key_update(a, b, c) do {} while (0)
 121 #define wlc_key_remove(a, b, c) do {} while (0)
 122 #define wlc_key_remove_all(a, b) do {} while (0)
 123 #define wlc_key_delete(a, b, c) do {} while (0)
 124 #define wlc_scb_key_delete(a, b) do {} while (0)
 125 #define wlc_key_lookup(a, b, c, d, e) (NULL)
 126 #define wlc_key_hw_init_all(a) do {} while (0)
 127 #define wlc_key_hw_init(a, b, c)  do {} while (0)
 128 #define wlc_key_hw_wowl_init(a, b, c, d) do {} while (0)
 129 #define wlc_key_sw_wowl_update(a, b, c, d, e) do {} while (0)
 130 #define wlc_key_sw_wowl_create(a, b, c) (BCME_ERROR)
 131 #define wlc_key_iv_update(a, b, c, d, e) do {(void)e; } while (0)
 132 #define wlc_key_iv_init(a, b, c) do {} while (0)
 133 #define wlc_key_set_error(a, b, c) (BCME_ERROR)
 134 #define wlc_key_dump_hw(a, b) (BCME_ERROR)
 135 #define wlc_key_dump_sw(a, b) (BCME_ERROR)
 136 #define wlc_key_defkeyflag(a) (0)
 137 #define wlc_rcmta_add_bssid(a, b) do {} while (0)
 138 #define wlc_rcmta_del_bssid(a, b) do {} while (0)
 139 #define wlc_key_scb_delete(a, b) do {} while (0)
 140
 141 #endif                          /* _wlc_key_h_ */