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urtwn: add raw Tx path.

Browse source 
Tested with RTL8188EU and RTL8188CUS in STA mode.

Reviewed by:	kevlo
Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D4523
This commit is contained in:
Andriy Voskoboinyk 2015-12-14 20:39:38 +00:00
parent 7e037c12f2
commit 31b80e9a5e
1 changed files with 119 additions and 1 deletions
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120
sys/dev/usb/wlan/if_urtwn.c
View file

@ -275,6 +275,10 @@ static int8_t urtwn_r88e_get_rssi(struct urtwn_softc *, int, void *);
static int urtwn_tx_data(struct urtwn_softc *,
struct ieee80211_node *, struct mbuf *,
struct urtwn_data *);
static int urtwn_tx_raw(struct urtwn_softc *,
struct ieee80211_node *, struct mbuf *,
struct urtwn_data *,
const struct ieee80211_bpf_params *);
static void urtwn_tx_start(struct urtwn_softc *, struct mbuf *,
uint8_t, struct urtwn_data *);
static int urtwn_transmit(struct ieee80211com *, struct mbuf *);
@ -2729,6 +2733,107 @@ urtwn_tx_data(struct urtwn_softc *sc, struct ieee80211_node *ni,
return (0);
}
static int
urtwn_tx_raw(struct urtwn_softc *sc, struct ieee80211_node *ni,
struct mbuf *m, struct urtwn_data *data,
const struct ieee80211_bpf_params *params)
{
struct ieee80211vap *vap = ni->ni_vap;
struct ieee80211_key *k = NULL;
struct ieee80211_frame *wh;
struct r92c_tx_desc *txd;
uint8_t cipher, ridx, type;
/* Encrypt the frame if need be. */
cipher = R92C_TXDW1_CIPHER_NONE;
if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
/* Retrieve key for TX. */
k = ieee80211_crypto_encap(ni, m);
if (k == NULL)
return (ENOBUFS);
if (!(k->wk_flags & IEEE80211_KEY_SWCRYPT)) {
switch (k->wk_cipher->ic_cipher) {
case IEEE80211_CIPHER_WEP:
case IEEE80211_CIPHER_TKIP:
cipher = R92C_TXDW1_CIPHER_RC4;
break;
case IEEE80211_CIPHER_AES_CCM:
cipher = R92C_TXDW1_CIPHER_AES;
break;
default:
device_printf(sc->sc_dev,
"%s: unknown cipher %d\n",
__func__, k->wk_cipher->ic_cipher);
return (EINVAL);
}
}
}
wh = mtod(m, struct ieee80211_frame *);
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
/* Fill Tx descriptor. */
txd = (struct r92c_tx_desc *)data->buf;
memset(txd, 0, sizeof(*txd));
txd->txdw0 |= htole32(
SM(R92C_TXDW0_OFFSET, sizeof(*txd)) |
R92C_TXDW0_OWN | R92C_TXDW0_FSG | R92C_TXDW0_LSG);
if (IEEE80211_IS_MULTICAST(wh->i_addr1))
txd->txdw0 |= htole32(R92C_TXDW0_BMCAST);
if (params->ibp_flags & IEEE80211_BPF_RTS)
txd->txdw4 |= htole32(R92C_TXDW4_RTSEN);
if (params->ibp_flags & IEEE80211_BPF_CTS)
txd->txdw4 |= htole32(R92C_TXDW4_CTS2SELF);
if (txd->txdw4 & htole32(R92C_TXDW4_RTSEN | R92C_TXDW4_CTS2SELF)) {
txd->txdw4 |= htole32(R92C_TXDW4_HWRTSEN);
txd->txdw4 |= htole32(SM(R92C_TXDW4_RTSRATE,
URTWN_RIDX_OFDM24));
}
if (sc->chip & URTWN_CHIP_88E)
txd->txdw1 |= htole32(SM(R88E_TXDW1_MACID, URTWN_MACID_BC));
else
txd->txdw1 |= htole32(SM(R92C_TXDW1_MACID, URTWN_MACID_BC));
txd->txdw1 |= htole32(SM(R92C_TXDW1_QSEL, R92C_TXDW1_QSEL_MGNT));
txd->txdw1 |= htole32(SM(R92C_TXDW1_CIPHER, cipher));
/* Choose a TX rate index. */
ridx = rate2ridx(params->ibp_rate0);
txd->txdw5 |= htole32(SM(R92C_TXDW5_DATARATE, ridx));
txd->txdw5 |= htole32(0x0001ff00);
txd->txdw4 |= htole32(R92C_TXDW4_DRVRATE);
if (!IEEE80211_QOS_HAS_SEQ(wh)) {
/* Use HW sequence numbering for non-QoS frames. */
if (sc->chip & URTWN_CHIP_88E)
txd->txdseq = htole16(R88E_TXDSEQ_HWSEQ_EN);
else
txd->txdw4 |= htole32(R92C_TXDW4_HWSEQ_EN);
} else {
/* Set sequence number. */
txd->txdseq = htole16(M_SEQNO_GET(m) % IEEE80211_SEQ_RANGE);
}
if (ieee80211_radiotap_active_vap(vap)) {
struct urtwn_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
if (k != NULL)
tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
ieee80211_radiotap_tx(vap, m);
}
data->ni = ni;
urtwn_tx_start(sc, m, type, data);
return (0);
}
static void
urtwn_tx_start(struct urtwn_softc *sc, struct mbuf *m, uint8_t type,
struct urtwn_data *data)
@ -4631,7 +4736,20 @@ urtwn_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
goto end;
}
if ((error = urtwn_tx_data(sc, ni, m, bf)) != 0) {
if (params == NULL) {
/*
* Legacy path; interpret frame contents to decide
* precisely how to send the frame.
*/
error = urtwn_tx_data(sc, ni, m, bf);
} else {
/*
* Caller supplied explicit parameters to use in
* sending the frame.
*/
error = urtwn_tx_raw(sc, ni, m, bf, params);
}
if (error != 0) {
STAILQ_INSERT_HEAD(&sc->sc_tx_inactive, bf, next);
goto end;
}