diff options
Diffstat (limited to 'freebsd/sys/dev/rtwn/rtl8192c/r92c_tx.c')
| -rw-r--r-- | freebsd/sys/dev/rtwn/rtl8192c/r92c_tx.c | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/freebsd/sys/dev/rtwn/rtl8192c/r92c_tx.c b/freebsd/sys/dev/rtwn/rtl8192c/r92c_tx.c new file mode 100644 index 00000000..0e3c408d --- /dev/null +++ b/freebsd/sys/dev/rtwn/rtl8192c/r92c_tx.c @@ -0,0 +1,438 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */ + +/*- + * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr> + * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org> + * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org> + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <rtems/bsd/local/opt_wlan.h> + +#include <rtems/bsd/sys/param.h> +#include <rtems/bsd/sys/lock.h> +#include <sys/mutex.h> +#include <sys/mbuf.h> +#include <sys/kernel.h> +#include <sys/socket.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/queue.h> +#include <sys/taskqueue.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/linker.h> + +#include <net/if.h> +#include <net/ethernet.h> +#include <net/if_media.h> + +#include <net80211/ieee80211_var.h> +#include <net80211/ieee80211_radiotap.h> + +#include <dev/rtwn/if_rtwnreg.h> +#include <dev/rtwn/if_rtwnvar.h> + +#include <dev/rtwn/if_rtwn_ridx.h> +#include <dev/rtwn/if_rtwn_tx.h> + +#include <dev/rtwn/rtl8192c/r92c.h> +#include <dev/rtwn/rtl8192c/r92c_var.h> +#include <dev/rtwn/rtl8192c/r92c_tx_desc.h> + + +static int +r92c_tx_get_sco(struct rtwn_softc *sc, struct ieee80211_channel *c) +{ + if (IEEE80211_IS_CHAN_HT40U(c)) + return (R92C_TXDW4_SCO_SCA); + else + return (R92C_TXDW4_SCO_SCB); +} + +static void +r92c_tx_set_ht40(struct rtwn_softc *sc, void *buf, struct ieee80211_node *ni) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + + if (ni->ni_chan != IEEE80211_CHAN_ANYC && + IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { + int extc_offset; + + extc_offset = r92c_tx_get_sco(sc, ni->ni_chan); + txd->txdw4 |= htole32(R92C_TXDW4_DATA_BW40); + txd->txdw4 |= htole32(SM(R92C_TXDW4_DATA_SCO, extc_offset)); + } +} + +static void +r92c_tx_protection(struct rtwn_softc *sc, struct r92c_tx_desc *txd, + enum ieee80211_protmode mode, uint8_t ridx) +{ + struct ieee80211com *ic = &sc->sc_ic; + uint8_t rate; + + switch (mode) { + case IEEE80211_PROT_CTSONLY: + txd->txdw4 |= htole32(R92C_TXDW4_CTS2SELF); + break; + case IEEE80211_PROT_RTSCTS: + txd->txdw4 |= htole32(R92C_TXDW4_RTSEN); + break; + default: + break; + } + + if (mode == IEEE80211_PROT_CTSONLY || + mode == IEEE80211_PROT_RTSCTS) { + if (ridx >= RTWN_RIDX_MCS(0)) + rate = rtwn_ctl_mcsrate(ic->ic_rt, ridx); + else + rate = ieee80211_ctl_rate(ic->ic_rt, ridx2rate[ridx]); + ridx = rate2ridx(rate); + + txd->txdw4 |= htole32(SM(R92C_TXDW4_RTSRATE, ridx)); + /* RTS rate fallback limit (max). */ + txd->txdw5 |= htole32(SM(R92C_TXDW5_RTSRATE_FB_LMT, 0xf)); + + if (RTWN_RATE_IS_CCK(ridx) && ridx != RTWN_RIDX_CCK1 && + (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) + txd->txdw4 |= htole32(R92C_TXDW4_RTS_SHORT); + } +} + +static void +r92c_tx_raid(struct rtwn_softc *sc, struct r92c_tx_desc *txd, + struct ieee80211_node *ni, int ismcast) +{ + struct ieee80211com *ic = &sc->sc_ic; + struct ieee80211vap *vap = ni->ni_vap; + struct ieee80211_channel *chan; + enum ieee80211_phymode mode; + uint8_t raid; + + chan = (ni->ni_chan != IEEE80211_CHAN_ANYC) ? + ni->ni_chan : ic->ic_curchan; + mode = ieee80211_chan2mode(chan); + + /* NB: group addressed frames are done at 11bg rates for now */ + if (ismcast || !(ni->ni_flags & IEEE80211_NODE_HT)) { + switch (mode) { + case IEEE80211_MODE_11B: + case IEEE80211_MODE_11G: + break; + case IEEE80211_MODE_11NG: + mode = IEEE80211_MODE_11G; + break; + default: + device_printf(sc->sc_dev, "unknown mode(1) %d!\n", + ic->ic_curmode); + return; + } + } + + switch (mode) { + case IEEE80211_MODE_11B: + raid = R92C_RAID_11B; + break; + case IEEE80211_MODE_11G: + if (vap->iv_flags & IEEE80211_F_PUREG) + raid = R92C_RAID_11G; + else + raid = R92C_RAID_11BG; + break; + case IEEE80211_MODE_11NG: + if (vap->iv_flags_ht & IEEE80211_FHT_PUREN) + raid = R92C_RAID_11N; + else + raid = R92C_RAID_11BGN; + break; + default: + device_printf(sc->sc_dev, "unknown mode(2) %d!\n", mode); + return; + } + + txd->txdw1 |= htole32(SM(R92C_TXDW1_RAID, raid)); +} + +/* XXX move to device-independent layer */ +static void +r92c_tx_set_sgi(struct rtwn_softc *sc, void *buf, struct ieee80211_node *ni) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + struct ieee80211vap *vap = ni->ni_vap; + + if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) && /* HT20 */ + (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20)) + txd->txdw5 |= htole32(R92C_TXDW5_SGI); + else if (ni->ni_chan != IEEE80211_CHAN_ANYC && /* HT40 */ + IEEE80211_IS_CHAN_HT40(ni->ni_chan) && + (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && + (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) + txd->txdw5 |= htole32(R92C_TXDW5_SGI); +} + +void +r92c_tx_enable_ampdu(void *buf, int enable) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + + if (enable) + txd->txdw1 |= htole32(R92C_TXDW1_AGGEN); + else + txd->txdw1 |= htole32(R92C_TXDW1_AGGBK); +} + +void +r92c_tx_setup_hwseq(void *buf) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + + txd->txdw4 |= htole32(R92C_TXDW4_HWSEQ_EN); +} + +void +r92c_tx_setup_macid(void *buf, int id) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + + txd->txdw1 |= htole32(SM(R92C_TXDW1_MACID, id)); +} + +void +r92c_fill_tx_desc(struct rtwn_softc *sc, struct ieee80211_node *ni, + struct mbuf *m, void *buf, uint8_t ridx, int maxretry) +{ +#ifndef RTWN_WITHOUT_UCODE + struct r92c_softc *rs = sc->sc_priv; +#endif + struct ieee80211com *ic = &sc->sc_ic; + struct ieee80211vap *vap = ni->ni_vap; + struct rtwn_vap *uvp = RTWN_VAP(vap); + struct ieee80211_frame *wh; + struct r92c_tx_desc *txd; + enum ieee80211_protmode prot; + uint8_t type, tid, qos, qsel; + int hasqos, ismcast, macid; + + wh = mtod(m, struct ieee80211_frame *); + type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; + hasqos = IEEE80211_QOS_HAS_SEQ(wh); + ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); + + /* Select TX ring for this frame. */ + if (hasqos) { + qos = ((const struct ieee80211_qosframe *)wh)->i_qos[0]; + tid = qos & IEEE80211_QOS_TID; + } else { + qos = 0; + tid = 0; + } + + /* Fill Tx descriptor. */ + txd = (struct r92c_tx_desc *)buf; + txd->flags0 |= R92C_FLAGS0_LSG | R92C_FLAGS0_FSG; + if (ismcast) + txd->flags0 |= R92C_FLAGS0_BMCAST; + + if (!ismcast) { + /* Unicast frame, check if an ACK is expected. */ + if (!qos || (qos & IEEE80211_QOS_ACKPOLICY) != + IEEE80211_QOS_ACKPOLICY_NOACK) { + txd->txdw5 |= htole32(R92C_TXDW5_RTY_LMT_ENA); + txd->txdw5 |= htole32(SM(R92C_TXDW5_RTY_LMT, + maxretry)); + } + + struct rtwn_node *un = RTWN_NODE(ni); + macid = un->id; + + if (type == IEEE80211_FC0_TYPE_DATA) { + qsel = tid % RTWN_MAX_TID; + + rtwn_r92c_tx_enable_ampdu(sc, buf, + (m->m_flags & M_AMPDU_MPDU) != 0); + if (m->m_flags & M_AMPDU_MPDU) { + txd->txdw2 |= htole32(SM(R92C_TXDW2_AMPDU_DEN, + vap->iv_ampdu_density)); + txd->txdw6 |= htole32(SM(R92C_TXDW6_MAX_AGG, + 0x1f)); /* XXX */ + } + if (sc->sc_ratectl == RTWN_RATECTL_NET80211) { + txd->txdw2 |= htole32(R92C_TXDW2_CCX_RPT); + sc->sc_tx_n_active++; +#ifndef RTWN_WITHOUT_UCODE + rs->rs_c2h_pending++; +#endif + } + + if (RTWN_RATE_IS_CCK(ridx) && ridx != RTWN_RIDX_CCK1 && + (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) + txd->txdw4 |= htole32(R92C_TXDW4_DATA_SHPRE); + + prot = IEEE80211_PROT_NONE; + if (ridx >= RTWN_RIDX_MCS(0)) { + r92c_tx_set_ht40(sc, txd, ni); + r92c_tx_set_sgi(sc, txd, ni); + prot = ic->ic_htprotmode; + } else if (ic->ic_flags & IEEE80211_F_USEPROT) + prot = ic->ic_protmode; + + /* XXX fix last comparison for A-MSDU (in net80211) */ + /* XXX A-MPDU? */ + if (m->m_pkthdr.len + IEEE80211_CRC_LEN > + vap->iv_rtsthreshold && + vap->iv_rtsthreshold != IEEE80211_RTS_MAX) + prot = IEEE80211_PROT_RTSCTS; + + /* NB: checks for ht40 / short bits (set above). */ + if (prot != IEEE80211_PROT_NONE) + r92c_tx_protection(sc, txd, prot, ridx); + } else /* IEEE80211_FC0_TYPE_MGT */ + qsel = R92C_TXDW1_QSEL_MGNT; + } else { + macid = RTWN_MACID_BC; + qsel = R92C_TXDW1_QSEL_MGNT; + } + + txd->txdw1 |= htole32(SM(R92C_TXDW1_QSEL, qsel)); + + rtwn_r92c_tx_setup_macid(sc, txd, macid); + txd->txdw5 |= htole32(SM(R92C_TXDW5_DATARATE, ridx)); + /* Data rate fallback limit (max). */ + txd->txdw5 |= htole32(SM(R92C_TXDW5_DATARATE_FB_LMT, 0x1f)); + txd->txdw4 |= htole32(SM(R92C_TXDW4_PORT_ID, uvp->id)); + r92c_tx_raid(sc, txd, ni, ismcast); + + /* Force this rate if needed. */ + if (sc->sc_ratectl != RTWN_RATECTL_FW) + txd->txdw4 |= htole32(R92C_TXDW4_DRVRATE); + + if (!hasqos) { + /* Use HW sequence numbering for non-QoS frames. */ + rtwn_r92c_tx_setup_hwseq(sc, txd); + txd->txdw4 |= htole32(SM(R92C_TXDW4_SEQ_SEL, uvp->id)); + } else { + uint16_t seqno; + + if (m->m_flags & M_AMPDU_MPDU) { + seqno = ni->ni_txseqs[tid]; + /* NB: clear Fragment Number field. */ + *(uint16_t *)wh->i_seq = 0; + ni->ni_txseqs[tid]++; + } else + seqno = M_SEQNO_GET(m) % IEEE80211_SEQ_RANGE; + + /* Set sequence number. */ + txd->txdseq = htole16(seqno); + } +} + +void +r92c_fill_tx_desc_raw(struct rtwn_softc *sc, struct ieee80211_node *ni, + struct mbuf *m, void *buf, const struct ieee80211_bpf_params *params) +{ + struct ieee80211vap *vap = ni->ni_vap; + struct rtwn_vap *uvp = RTWN_VAP(vap); + struct ieee80211_frame *wh; + struct r92c_tx_desc *txd; + uint8_t ridx; + int ismcast; + + /* XXX TODO: 11n checks, matching r92c_fill_tx_desc() */ + + wh = mtod(m, struct ieee80211_frame *); + ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); + ridx = rate2ridx(params->ibp_rate0); + + /* Fill Tx descriptor. */ + txd = (struct r92c_tx_desc *)buf; + txd->flags0 |= R92C_FLAGS0_LSG | R92C_FLAGS0_FSG; + if (ismcast) + txd->flags0 |= R92C_FLAGS0_BMCAST; + + if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) { + txd->txdw5 |= htole32(R92C_TXDW5_RTY_LMT_ENA); + txd->txdw5 |= htole32(SM(R92C_TXDW5_RTY_LMT, + params->ibp_try0)); + } + if (params->ibp_flags & IEEE80211_BPF_RTS) + r92c_tx_protection(sc, txd, IEEE80211_PROT_RTSCTS, ridx); + if (params->ibp_flags & IEEE80211_BPF_CTS) + r92c_tx_protection(sc, txd, IEEE80211_PROT_CTSONLY, ridx); + + rtwn_r92c_tx_setup_macid(sc, txd, RTWN_MACID_BC); + txd->txdw1 |= htole32(SM(R92C_TXDW1_QSEL, R92C_TXDW1_QSEL_MGNT)); + + /* Set TX rate index. */ + txd->txdw5 |= htole32(SM(R92C_TXDW5_DATARATE, ridx)); + txd->txdw5 |= htole32(SM(R92C_TXDW5_DATARATE_FB_LMT, 0x1f)); + txd->txdw4 |= htole32(SM(R92C_TXDW4_PORT_ID, uvp->id)); + txd->txdw4 |= htole32(R92C_TXDW4_DRVRATE); + r92c_tx_raid(sc, txd, ni, ismcast); + + if (!IEEE80211_QOS_HAS_SEQ(wh)) { + /* Use HW sequence numbering for non-QoS frames. */ + rtwn_r92c_tx_setup_hwseq(sc, txd); + txd->txdw4 |= htole32(SM(R92C_TXDW4_SEQ_SEL, uvp->id)); + } else { + /* Set sequence number. */ + txd->txdseq |= htole16(M_SEQNO_GET(m) % IEEE80211_SEQ_RANGE); + } +} + +void +r92c_fill_tx_desc_null(struct rtwn_softc *sc, void *buf, int is11b, + int qos, int id) +{ + struct r92c_tx_desc *txd = (struct r92c_tx_desc *)buf; + + txd->flags0 = R92C_FLAGS0_FSG | R92C_FLAGS0_LSG | R92C_FLAGS0_OWN; + txd->txdw1 = htole32( + SM(R92C_TXDW1_QSEL, R92C_TXDW1_QSEL_MGNT)); + + txd->txdw4 = htole32(R92C_TXDW4_DRVRATE); + txd->txdw4 |= htole32(SM(R92C_TXDW4_PORT_ID, id)); + if (is11b) { + txd->txdw5 = htole32(SM(R92C_TXDW5_DATARATE, + RTWN_RIDX_CCK1)); + } else { + txd->txdw5 = htole32(SM(R92C_TXDW5_DATARATE, + RTWN_RIDX_OFDM6)); + } + + if (!qos) { + rtwn_r92c_tx_setup_hwseq(sc, txd); + txd->txdw4 |= htole32(SM(R92C_TXDW4_SEQ_SEL, id)); + } +} + +uint8_t +r92c_tx_radiotap_flags(const void *buf) +{ + const struct r92c_tx_desc *txd = buf; + uint8_t flags; + + flags = 0; + if (txd->txdw4 & htole32(R92C_TXDW4_DATA_SHPRE)) + flags |= IEEE80211_RADIOTAP_F_SHORTPRE; + if (txd->txdw5 & htole32(R92C_TXDW5_SGI)) + flags |= IEEE80211_RADIOTAP_F_SHORTGI; + return (flags); +} |