365 lines
8.8 KiB
C
365 lines
8.8 KiB
C
/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
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/*-
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* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
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* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
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* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <net/if.h>
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#include <net/ethernet.h>
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#include <net/if_media.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_radiotap.h>
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#include <dev/rtwn/if_rtwnreg.h>
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#include <dev/rtwn/if_rtwnvar.h>
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#include <dev/rtwn/if_rtwn_cam.h>
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#include <dev/rtwn/if_rtwn_debug.h>
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#include <dev/rtwn/if_rtwn_task.h>
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#include <dev/rtwn/rtl8192c/r92c_reg.h>
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void
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rtwn_init_cam(struct rtwn_softc *sc)
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{
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/* Invalidate all CAM entries. */
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rtwn_write_4(sc, R92C_CAMCMD,
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R92C_CAMCMD_POLLING | R92C_CAMCMD_CLR);
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}
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static int
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rtwn_cam_write(struct rtwn_softc *sc, uint32_t addr, uint32_t data)
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{
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int error;
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error = rtwn_write_4(sc, R92C_CAMWRITE, data);
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if (error != 0)
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return (error);
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error = rtwn_write_4(sc, R92C_CAMCMD,
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R92C_CAMCMD_POLLING | R92C_CAMCMD_WRITE |
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SM(R92C_CAMCMD_ADDR, addr));
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return (error);
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}
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void
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rtwn_init_seccfg(struct rtwn_softc *sc)
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{
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uint16_t seccfg;
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/* Select decryption / encryption flags. */
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seccfg = 0;
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switch (sc->sc_hwcrypto) {
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case RTWN_CRYPTO_SW:
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break; /* nothing to do */
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case RTWN_CRYPTO_PAIR:
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/* NB: TXUCKEY_DEF / RXUCKEY_DEF are required for RTL8192C */
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seccfg = R92C_SECCFG_TXUCKEY_DEF | R92C_SECCFG_RXUCKEY_DEF |
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R92C_SECCFG_TXENC_ENA | R92C_SECCFG_RXDEC_ENA |
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R92C_SECCFG_MC_SRCH_DIS;
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break;
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case RTWN_CRYPTO_FULL:
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seccfg = R92C_SECCFG_TXUCKEY_DEF | R92C_SECCFG_RXUCKEY_DEF |
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R92C_SECCFG_TXENC_ENA | R92C_SECCFG_RXDEC_ENA |
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R92C_SECCFG_TXBCKEY_DEF | R92C_SECCFG_RXBCKEY_DEF;
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break;
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default:
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KASSERT(0, ("%s: case %d was not handled\n", __func__,
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sc->sc_hwcrypto));
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break;
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}
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RTWN_DPRINTF(sc, RTWN_DEBUG_KEY, "%s: seccfg %04X, hwcrypto %d\n",
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__func__, seccfg, sc->sc_hwcrypto);
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rtwn_write_2(sc, R92C_SECCFG, seccfg);
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}
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int
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rtwn_key_alloc(struct ieee80211vap *vap, struct ieee80211_key *k,
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ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix)
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{
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struct rtwn_softc *sc = vap->iv_ic->ic_softc;
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int i, start;
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if (&vap->iv_nw_keys[0] <= k &&
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k < &vap->iv_nw_keys[IEEE80211_WEP_NKID]) {
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#if __FreeBSD_version > 1200018
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*keyix = ieee80211_crypto_get_key_wepidx(vap, k);
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#else
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*keyix = k - vap->iv_nw_keys;
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#endif
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if (sc->sc_hwcrypto != RTWN_CRYPTO_FULL)
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k->wk_flags |= IEEE80211_KEY_SWCRYPT;
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else {
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RTWN_LOCK(sc);
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if (isset(sc->keys_bmap, *keyix)) {
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device_printf(sc->sc_dev,
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"%s: group key slot %d is already used!\n",
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__func__, *keyix);
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/* XXX recover? */
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RTWN_UNLOCK(sc);
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return (0);
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}
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setbit(sc->keys_bmap, *keyix);
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RTWN_UNLOCK(sc);
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}
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goto end;
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}
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start = sc->cam_entry_limit;
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switch (sc->sc_hwcrypto) {
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case RTWN_CRYPTO_SW:
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k->wk_flags |= IEEE80211_KEY_SWCRYPT;
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*keyix = 0;
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goto end;
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case RTWN_CRYPTO_PAIR:
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/* all slots for pairwise keys. */
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start = 0;
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RTWN_LOCK(sc);
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if (sc->sc_flags & RTWN_FLAG_CAM_FIXED)
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start = 4;
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RTWN_UNLOCK(sc);
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break;
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case RTWN_CRYPTO_FULL:
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/* first 4 - for group keys, others for pairwise. */
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start = 4;
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break;
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default:
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KASSERT(0, ("%s: case %d was not handled!\n",
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__func__, sc->sc_hwcrypto));
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break;
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}
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RTWN_LOCK(sc);
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for (i = start; i < sc->cam_entry_limit; i++) {
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if (isclr(sc->keys_bmap, i)) {
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setbit(sc->keys_bmap, i);
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*keyix = i;
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break;
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}
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}
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RTWN_UNLOCK(sc);
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if (i == sc->cam_entry_limit) {
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#if __FreeBSD_version > 1200008
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/* XXX check and remove keys with the same MAC address */
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k->wk_flags |= IEEE80211_KEY_SWCRYPT;
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*keyix = 0;
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#else
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device_printf(sc->sc_dev,
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"%s: no free space in the key table\n", __func__);
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return (0);
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#endif
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}
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end:
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*rxkeyix = *keyix;
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return (1);
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}
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static int
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rtwn_key_set_cb0(struct rtwn_softc *sc, const struct ieee80211_key *k)
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{
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uint8_t algo, keyid;
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int i, error;
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if (sc->sc_hwcrypto == RTWN_CRYPTO_FULL &&
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k->wk_keyix < IEEE80211_WEP_NKID)
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keyid = k->wk_keyix;
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else
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keyid = 0;
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/* Map net80211 cipher to HW crypto algorithm. */
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switch (k->wk_cipher->ic_cipher) {
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case IEEE80211_CIPHER_WEP:
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if (k->wk_keylen < 8)
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algo = R92C_CAM_ALGO_WEP40;
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else
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algo = R92C_CAM_ALGO_WEP104;
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break;
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case IEEE80211_CIPHER_TKIP:
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algo = R92C_CAM_ALGO_TKIP;
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break;
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case IEEE80211_CIPHER_AES_CCM:
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algo = R92C_CAM_ALGO_AES;
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break;
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default:
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device_printf(sc->sc_dev, "%s: unknown cipher %u\n",
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__func__, k->wk_cipher->ic_cipher);
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return (EINVAL);
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}
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RTWN_DPRINTF(sc, RTWN_DEBUG_KEY,
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"%s: keyix %u, keyid %u, algo %u/%u, flags %04X, len %u, "
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"macaddr %s\n", __func__, k->wk_keyix, keyid,
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k->wk_cipher->ic_cipher, algo, k->wk_flags, k->wk_keylen,
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ether_sprintf(k->wk_macaddr));
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/* Clear high bits. */
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rtwn_cam_write(sc, R92C_CAM_CTL6(k->wk_keyix), 0);
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rtwn_cam_write(sc, R92C_CAM_CTL7(k->wk_keyix), 0);
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/* Write key. */
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for (i = 0; i < 4; i++) {
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error = rtwn_cam_write(sc, R92C_CAM_KEY(k->wk_keyix, i),
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le32dec(&k->wk_key[i * 4]));
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if (error != 0)
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goto fail;
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}
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/* Write CTL0 last since that will validate the CAM entry. */
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error = rtwn_cam_write(sc, R92C_CAM_CTL1(k->wk_keyix),
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le32dec(&k->wk_macaddr[2]));
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if (error != 0)
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goto fail;
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error = rtwn_cam_write(sc, R92C_CAM_CTL0(k->wk_keyix),
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SM(R92C_CAM_ALGO, algo) |
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SM(R92C_CAM_KEYID, keyid) |
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SM(R92C_CAM_MACLO, le16dec(&k->wk_macaddr[0])) |
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R92C_CAM_VALID);
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if (error != 0)
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goto fail;
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return (0);
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fail:
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device_printf(sc->sc_dev, "%s fails, error %d\n", __func__, error);
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return (error);
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}
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static void
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rtwn_key_set_cb(struct rtwn_softc *sc, union sec_param *data)
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{
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const struct ieee80211_key *k = &data->key;
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(void) rtwn_key_set_cb0(sc, k);
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}
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int
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rtwn_init_static_keys(struct rtwn_softc *sc, struct rtwn_vap *rvp)
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{
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int i, error;
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if (sc->sc_hwcrypto != RTWN_CRYPTO_FULL)
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return (0); /* nothing to do */
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for (i = 0; i < IEEE80211_WEP_NKID; i++) {
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const struct ieee80211_key *k = rvp->keys[i];
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if (k != NULL) {
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error = rtwn_key_set_cb0(sc, k);
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if (error != 0)
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return (error);
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}
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}
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return (0);
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}
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static void
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rtwn_key_del_cb(struct rtwn_softc *sc, union sec_param *data)
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{
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struct ieee80211_key *k = &data->key;
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int i;
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RTWN_DPRINTF(sc, RTWN_DEBUG_KEY,
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"%s: keyix %u, flags %04X, macaddr %s\n", __func__,
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k->wk_keyix, k->wk_flags, ether_sprintf(k->wk_macaddr));
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rtwn_cam_write(sc, R92C_CAM_CTL0(k->wk_keyix), 0);
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rtwn_cam_write(sc, R92C_CAM_CTL1(k->wk_keyix), 0);
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/* Clear key. */
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for (i = 0; i < 4; i++)
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rtwn_cam_write(sc, R92C_CAM_KEY(k->wk_keyix, i), 0);
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clrbit(sc->keys_bmap, k->wk_keyix);
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}
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static int
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rtwn_process_key(struct ieee80211vap *vap, const struct ieee80211_key *k,
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int set)
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{
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struct rtwn_softc *sc = vap->iv_ic->ic_softc;
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if (k->wk_flags & IEEE80211_KEY_SWCRYPT) {
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/* Not for us. */
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return (1);
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}
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if (&vap->iv_nw_keys[0] <= k &&
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k < &vap->iv_nw_keys[IEEE80211_WEP_NKID]) {
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#if __FreeBSD_version <= 1200008
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struct ieee80211_key *k1 = &vap->iv_nw_keys[k->wk_keyix];
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if (sc->sc_hwcrypto != RTWN_CRYPTO_FULL) {
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k1->wk_flags |= IEEE80211_KEY_SWCRYPT;
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return (k->wk_cipher->ic_setkey(k1));
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} else {
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#else
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if (sc->sc_hwcrypto == RTWN_CRYPTO_FULL) {
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#endif
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struct rtwn_vap *rvp = RTWN_VAP(vap);
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RTWN_LOCK(sc);
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rvp->keys[k->wk_keyix] = (set ? k : NULL);
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if ((sc->sc_flags & RTWN_RUNNING) == 0) {
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if (!set)
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clrbit(sc->keys_bmap, k->wk_keyix);
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RTWN_UNLOCK(sc);
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return (1);
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}
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RTWN_UNLOCK(sc);
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}
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}
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return (!rtwn_cmd_sleepable(sc, k, sizeof(*k),
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set ? rtwn_key_set_cb : rtwn_key_del_cb));
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}
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int
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rtwn_key_set(struct ieee80211vap *vap, const struct ieee80211_key *k)
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{
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return (rtwn_process_key(vap, k, 1));
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}
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int
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rtwn_key_delete(struct ieee80211vap *vap, const struct ieee80211_key *k)
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{
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return (rtwn_process_key(vap, k, 0));
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}
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