diff options
author | Luis R. Rodriguez <lrodriguez@atheros.com> | 2009-03-31 06:30:33 +0400 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-04-23 00:54:38 +0400 |
commit | 203c4805e91786f9a010bc7945a0fde70c9da28e (patch) | |
tree | 00415276b2fe65713f066ffe07b11ad2d8b6bea8 /drivers/net/wireless/ath9k/recv.c | |
parent | 1878f77e13b9d720b78c4f818b94bfd4a7f596e5 (diff) | |
download | linux-203c4805e91786f9a010bc7945a0fde70c9da28e.tar.xz |
atheros: put atheros wireless drivers into ath/
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath9k/recv.c')
-rw-r--r-- | drivers/net/wireless/ath9k/recv.c | 704 |
1 files changed, 0 insertions, 704 deletions
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c deleted file mode 100644 index b46badd21f73..000000000000 --- a/drivers/net/wireless/ath9k/recv.c +++ /dev/null @@ -1,704 +0,0 @@ -/* - * Copyright (c) 2008-2009 Atheros Communications Inc. - * - * Permission to use, copy, modify, and/or 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 "ath9k.h" - -static struct ieee80211_hw * ath_get_virt_hw(struct ath_softc *sc, - struct ieee80211_hdr *hdr) -{ - struct ieee80211_hw *hw = sc->pri_wiphy->hw; - int i; - - spin_lock_bh(&sc->wiphy_lock); - for (i = 0; i < sc->num_sec_wiphy; i++) { - struct ath_wiphy *aphy = sc->sec_wiphy[i]; - if (aphy == NULL) - continue; - if (compare_ether_addr(hdr->addr1, aphy->hw->wiphy->perm_addr) - == 0) { - hw = aphy->hw; - break; - } - } - spin_unlock_bh(&sc->wiphy_lock); - return hw; -} - -/* - * Setup and link descriptors. - * - * 11N: we can no longer afford to self link the last descriptor. - * MAC acknowledges BA status as long as it copies frames to host - * buffer (or rx fifo). This can incorrectly acknowledge packets - * to a sender if last desc is self-linked. - */ -static void ath_rx_buf_link(struct ath_softc *sc, struct ath_buf *bf) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_desc *ds; - struct sk_buff *skb; - - ATH_RXBUF_RESET(bf); - - ds = bf->bf_desc; - ds->ds_link = 0; /* link to null */ - ds->ds_data = bf->bf_buf_addr; - - /* virtual addr of the beginning of the buffer. */ - skb = bf->bf_mpdu; - ASSERT(skb != NULL); - ds->ds_vdata = skb->data; - - /* setup rx descriptors. The rx.bufsize here tells the harware - * how much data it can DMA to us and that we are prepared - * to process */ - ath9k_hw_setuprxdesc(ah, ds, - sc->rx.bufsize, - 0); - - if (sc->rx.rxlink == NULL) - ath9k_hw_putrxbuf(ah, bf->bf_daddr); - else - *sc->rx.rxlink = bf->bf_daddr; - - sc->rx.rxlink = &ds->ds_link; - ath9k_hw_rxena(ah); -} - -static void ath_setdefantenna(struct ath_softc *sc, u32 antenna) -{ - /* XXX block beacon interrupts */ - ath9k_hw_setantenna(sc->sc_ah, antenna); - sc->rx.defant = antenna; - sc->rx.rxotherant = 0; -} - -/* - * Extend 15-bit time stamp from rx descriptor to - * a full 64-bit TSF using the current h/w TSF. -*/ -static u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp) -{ - u64 tsf; - - tsf = ath9k_hw_gettsf64(sc->sc_ah); - if ((tsf & 0x7fff) < rstamp) - tsf -= 0x8000; - return (tsf & ~0x7fff) | rstamp; -} - -static struct sk_buff *ath_rxbuf_alloc(struct ath_softc *sc, u32 len, gfp_t gfp_mask) -{ - struct sk_buff *skb; - u32 off; - - /* - * Cache-line-align. This is important (for the - * 5210 at least) as not doing so causes bogus data - * in rx'd frames. - */ - - /* Note: the kernel can allocate a value greater than - * what we ask it to give us. We really only need 4 KB as that - * is this hardware supports and in fact we need at least 3849 - * as that is the MAX AMSDU size this hardware supports. - * Unfortunately this means we may get 8 KB here from the - * kernel... and that is actually what is observed on some - * systems :( */ - skb = __dev_alloc_skb(len + sc->cachelsz - 1, gfp_mask); - if (skb != NULL) { - off = ((unsigned long) skb->data) % sc->cachelsz; - if (off != 0) - skb_reserve(skb, sc->cachelsz - off); - } else { - DPRINTF(sc, ATH_DBG_FATAL, - "skbuff alloc of size %u failed\n", len); - return NULL; - } - - return skb; -} - -/* - * For Decrypt or Demic errors, we only mark packet status here and always push - * up the frame up to let mac80211 handle the actual error case, be it no - * decryption key or real decryption error. This let us keep statistics there. - */ -static int ath_rx_prepare(struct sk_buff *skb, struct ath_desc *ds, - struct ieee80211_rx_status *rx_status, bool *decrypt_error, - struct ath_softc *sc) -{ - struct ieee80211_hdr *hdr; - u8 ratecode; - __le16 fc; - struct ieee80211_hw *hw; - - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; - memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); - hw = ath_get_virt_hw(sc, hdr); - - if (ds->ds_rxstat.rs_more) { - /* - * Frame spans multiple descriptors; this cannot happen yet - * as we don't support jumbograms. If not in monitor mode, - * discard the frame. Enable this if you want to see - * error frames in Monitor mode. - */ - if (sc->sc_ah->opmode != NL80211_IFTYPE_MONITOR) - goto rx_next; - } else if (ds->ds_rxstat.rs_status != 0) { - if (ds->ds_rxstat.rs_status & ATH9K_RXERR_CRC) - rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; - if (ds->ds_rxstat.rs_status & ATH9K_RXERR_PHY) - goto rx_next; - - if (ds->ds_rxstat.rs_status & ATH9K_RXERR_DECRYPT) { - *decrypt_error = true; - } else if (ds->ds_rxstat.rs_status & ATH9K_RXERR_MIC) { - if (ieee80211_is_ctl(fc)) - /* - * Sometimes, we get invalid - * MIC failures on valid control frames. - * Remove these mic errors. - */ - ds->ds_rxstat.rs_status &= ~ATH9K_RXERR_MIC; - else - rx_status->flag |= RX_FLAG_MMIC_ERROR; - } - /* - * Reject error frames with the exception of - * decryption and MIC failures. For monitor mode, - * we also ignore the CRC error. - */ - if (sc->sc_ah->opmode == NL80211_IFTYPE_MONITOR) { - if (ds->ds_rxstat.rs_status & - ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | - ATH9K_RXERR_CRC)) - goto rx_next; - } else { - if (ds->ds_rxstat.rs_status & - ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) { - goto rx_next; - } - } - } - - ratecode = ds->ds_rxstat.rs_rate; - - if (ratecode & 0x80) { - /* HT rate */ - rx_status->flag |= RX_FLAG_HT; - if (ds->ds_rxstat.rs_flags & ATH9K_RX_2040) - rx_status->flag |= RX_FLAG_40MHZ; - if (ds->ds_rxstat.rs_flags & ATH9K_RX_GI) - rx_status->flag |= RX_FLAG_SHORT_GI; - rx_status->rate_idx = ratecode & 0x7f; - } else { - int i = 0, cur_band, n_rates; - - cur_band = hw->conf.channel->band; - n_rates = sc->sbands[cur_band].n_bitrates; - - for (i = 0; i < n_rates; i++) { - if (sc->sbands[cur_band].bitrates[i].hw_value == - ratecode) { - rx_status->rate_idx = i; - break; - } - - if (sc->sbands[cur_band].bitrates[i].hw_value_short == - ratecode) { - rx_status->rate_idx = i; - rx_status->flag |= RX_FLAG_SHORTPRE; - break; - } - } - } - - rx_status->mactime = ath_extend_tsf(sc, ds->ds_rxstat.rs_tstamp); - rx_status->band = hw->conf.channel->band; - rx_status->freq = hw->conf.channel->center_freq; - rx_status->noise = sc->ani.noise_floor; - rx_status->signal = rx_status->noise + ds->ds_rxstat.rs_rssi; - rx_status->antenna = ds->ds_rxstat.rs_antenna; - - /* at 45 you will be able to use MCS 15 reliably. A more elaborate - * scheme can be used here but it requires tables of SNR/throughput for - * each possible mode used. */ - rx_status->qual = ds->ds_rxstat.rs_rssi * 100 / 45; - - /* rssi can be more than 45 though, anything above that - * should be considered at 100% */ - if (rx_status->qual > 100) - rx_status->qual = 100; - - rx_status->flag |= RX_FLAG_TSFT; - - return 1; -rx_next: - return 0; -} - -static void ath_opmode_init(struct ath_softc *sc) -{ - struct ath_hw *ah = sc->sc_ah; - u32 rfilt, mfilt[2]; - - /* configure rx filter */ - rfilt = ath_calcrxfilter(sc); - ath9k_hw_setrxfilter(ah, rfilt); - - /* configure bssid mask */ - if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) - ath9k_hw_setbssidmask(sc); - - /* configure operational mode */ - ath9k_hw_setopmode(ah); - - /* Handle any link-level address change. */ - ath9k_hw_setmac(ah, sc->sc_ah->macaddr); - - /* calculate and install multicast filter */ - mfilt[0] = mfilt[1] = ~0; - ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]); -} - -int ath_rx_init(struct ath_softc *sc, int nbufs) -{ - struct sk_buff *skb; - struct ath_buf *bf; - int error = 0; - - spin_lock_init(&sc->rx.rxflushlock); - sc->sc_flags &= ~SC_OP_RXFLUSH; - spin_lock_init(&sc->rx.rxbuflock); - - sc->rx.bufsize = roundup(IEEE80211_MAX_MPDU_LEN, - min(sc->cachelsz, (u16)64)); - - DPRINTF(sc, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n", - sc->cachelsz, sc->rx.bufsize); - - /* Initialize rx descriptors */ - - error = ath_descdma_setup(sc, &sc->rx.rxdma, &sc->rx.rxbuf, - "rx", nbufs, 1); - if (error != 0) { - DPRINTF(sc, ATH_DBG_FATAL, - "failed to allocate rx descriptors: %d\n", error); - goto err; - } - - list_for_each_entry(bf, &sc->rx.rxbuf, list) { - skb = ath_rxbuf_alloc(sc, sc->rx.bufsize, GFP_KERNEL); - if (skb == NULL) { - error = -ENOMEM; - goto err; - } - - bf->bf_mpdu = skb; - bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, - sc->rx.bufsize, - DMA_FROM_DEVICE); - if (unlikely(dma_mapping_error(sc->dev, - bf->bf_buf_addr))) { - dev_kfree_skb_any(skb); - bf->bf_mpdu = NULL; - DPRINTF(sc, ATH_DBG_FATAL, - "dma_mapping_error() on RX init\n"); - error = -ENOMEM; - goto err; - } - bf->bf_dmacontext = bf->bf_buf_addr; - } - sc->rx.rxlink = NULL; - -err: - if (error) - ath_rx_cleanup(sc); - - return error; -} - -void ath_rx_cleanup(struct ath_softc *sc) -{ - struct sk_buff *skb; - struct ath_buf *bf; - - list_for_each_entry(bf, &sc->rx.rxbuf, list) { - skb = bf->bf_mpdu; - if (skb) { - dma_unmap_single(sc->dev, bf->bf_buf_addr, - sc->rx.bufsize, DMA_FROM_DEVICE); - dev_kfree_skb(skb); - } - } - - if (sc->rx.rxdma.dd_desc_len != 0) - ath_descdma_cleanup(sc, &sc->rx.rxdma, &sc->rx.rxbuf); -} - -/* - * Calculate the receive filter according to the - * operating mode and state: - * - * o always accept unicast, broadcast, and multicast traffic - * o maintain current state of phy error reception (the hal - * may enable phy error frames for noise immunity work) - * o probe request frames are accepted only when operating in - * hostap, adhoc, or monitor modes - * o enable promiscuous mode according to the interface state - * o accept beacons: - * - when operating in adhoc mode so the 802.11 layer creates - * node table entries for peers, - * - when operating in station mode for collecting rssi data when - * the station is otherwise quiet, or - * - when operating as a repeater so we see repeater-sta beacons - * - when scanning - */ - -u32 ath_calcrxfilter(struct ath_softc *sc) -{ -#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR) - - u32 rfilt; - - rfilt = (ath9k_hw_getrxfilter(sc->sc_ah) & RX_FILTER_PRESERVE) - | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST - | ATH9K_RX_FILTER_MCAST; - - /* If not a STA, enable processing of Probe Requests */ - if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) - rfilt |= ATH9K_RX_FILTER_PROBEREQ; - - /* - * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station - * mode interface or when in monitor mode. AP mode does not need this - * since it receives all in-BSS frames anyway. - */ - if (((sc->sc_ah->opmode != NL80211_IFTYPE_AP) && - (sc->rx.rxfilter & FIF_PROMISC_IN_BSS)) || - (sc->sc_ah->opmode == NL80211_IFTYPE_MONITOR)) - rfilt |= ATH9K_RX_FILTER_PROM; - - if (sc->rx.rxfilter & FIF_CONTROL) - rfilt |= ATH9K_RX_FILTER_CONTROL; - - if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) && - !(sc->rx.rxfilter & FIF_BCN_PRBRESP_PROMISC)) - rfilt |= ATH9K_RX_FILTER_MYBEACON; - else - rfilt |= ATH9K_RX_FILTER_BEACON; - - /* If in HOSTAP mode, want to enable reception of PSPOLL frames */ - if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) - rfilt |= ATH9K_RX_FILTER_PSPOLL; - - if (sc->sec_wiphy) { - /* TODO: only needed if more than one BSSID is in use in - * station/adhoc mode */ - /* TODO: for older chips, may need to add ATH9K_RX_FILTER_PROM - */ - rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL; - } - - return rfilt; - -#undef RX_FILTER_PRESERVE -} - -int ath_startrecv(struct ath_softc *sc) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf, *tbf; - - spin_lock_bh(&sc->rx.rxbuflock); - if (list_empty(&sc->rx.rxbuf)) - goto start_recv; - - sc->rx.rxlink = NULL; - list_for_each_entry_safe(bf, tbf, &sc->rx.rxbuf, list) { - ath_rx_buf_link(sc, bf); - } - - /* We could have deleted elements so the list may be empty now */ - if (list_empty(&sc->rx.rxbuf)) - goto start_recv; - - bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list); - ath9k_hw_putrxbuf(ah, bf->bf_daddr); - ath9k_hw_rxena(ah); - -start_recv: - spin_unlock_bh(&sc->rx.rxbuflock); - ath_opmode_init(sc); - ath9k_hw_startpcureceive(ah); - - return 0; -} - -bool ath_stoprecv(struct ath_softc *sc) -{ - struct ath_hw *ah = sc->sc_ah; - bool stopped; - - ath9k_hw_stoppcurecv(ah); - ath9k_hw_setrxfilter(ah, 0); - stopped = ath9k_hw_stopdmarecv(ah); - sc->rx.rxlink = NULL; - - return stopped; -} - -void ath_flushrecv(struct ath_softc *sc) -{ - spin_lock_bh(&sc->rx.rxflushlock); - sc->sc_flags |= SC_OP_RXFLUSH; - ath_rx_tasklet(sc, 1); - sc->sc_flags &= ~SC_OP_RXFLUSH; - spin_unlock_bh(&sc->rx.rxflushlock); -} - -int ath_rx_tasklet(struct ath_softc *sc, int flush) -{ -#define PA2DESC(_sc, _pa) \ - ((struct ath_desc *)((caddr_t)(_sc)->rx.rxdma.dd_desc + \ - ((_pa) - (_sc)->rx.rxdma.dd_desc_paddr))) - - struct ath_buf *bf; - struct ath_desc *ds; - struct sk_buff *skb = NULL, *requeue_skb; - struct ieee80211_rx_status rx_status; - struct ath_hw *ah = sc->sc_ah; - struct ieee80211_hdr *hdr; - int hdrlen, padsize, retval; - bool decrypt_error = false; - u8 keyix; - __le16 fc; - - spin_lock_bh(&sc->rx.rxbuflock); - - do { - /* If handling rx interrupt and flush is in progress => exit */ - if ((sc->sc_flags & SC_OP_RXFLUSH) && (flush == 0)) - break; - - if (list_empty(&sc->rx.rxbuf)) { - sc->rx.rxlink = NULL; - break; - } - - bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list); - ds = bf->bf_desc; - - /* - * Must provide the virtual address of the current - * descriptor, the physical address, and the virtual - * address of the next descriptor in the h/w chain. - * This allows the HAL to look ahead to see if the - * hardware is done with a descriptor by checking the - * done bit in the following descriptor and the address - * of the current descriptor the DMA engine is working - * on. All this is necessary because of our use of - * a self-linked list to avoid rx overruns. - */ - retval = ath9k_hw_rxprocdesc(ah, ds, - bf->bf_daddr, - PA2DESC(sc, ds->ds_link), - 0); - if (retval == -EINPROGRESS) { - struct ath_buf *tbf; - struct ath_desc *tds; - - if (list_is_last(&bf->list, &sc->rx.rxbuf)) { - sc->rx.rxlink = NULL; - break; - } - - tbf = list_entry(bf->list.next, struct ath_buf, list); - - /* - * On some hardware the descriptor status words could - * get corrupted, including the done bit. Because of - * this, check if the next descriptor's done bit is - * set or not. - * - * If the next descriptor's done bit is set, the current - * descriptor has been corrupted. Force s/w to discard - * this descriptor and continue... - */ - - tds = tbf->bf_desc; - retval = ath9k_hw_rxprocdesc(ah, tds, tbf->bf_daddr, - PA2DESC(sc, tds->ds_link), 0); - if (retval == -EINPROGRESS) { - break; - } - } - - skb = bf->bf_mpdu; - if (!skb) - continue; - - /* - * Synchronize the DMA transfer with CPU before - * 1. accessing the frame - * 2. requeueing the same buffer to h/w - */ - dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr, - sc->rx.bufsize, - DMA_FROM_DEVICE); - - /* - * If we're asked to flush receive queue, directly - * chain it back at the queue without processing it. - */ - if (flush) - goto requeue; - - if (!ds->ds_rxstat.rs_datalen) - goto requeue; - - /* The status portion of the descriptor could get corrupted. */ - if (sc->rx.bufsize < ds->ds_rxstat.rs_datalen) - goto requeue; - - if (!ath_rx_prepare(skb, ds, &rx_status, &decrypt_error, sc)) - goto requeue; - - /* Ensure we always have an skb to requeue once we are done - * processing the current buffer's skb */ - requeue_skb = ath_rxbuf_alloc(sc, sc->rx.bufsize, GFP_ATOMIC); - - /* If there is no memory we ignore the current RX'd frame, - * tell hardware it can give us a new frame using the old - * skb and put it at the tail of the sc->rx.rxbuf list for - * processing. */ - if (!requeue_skb) - goto requeue; - - /* Unmap the frame */ - dma_unmap_single(sc->dev, bf->bf_buf_addr, - sc->rx.bufsize, - DMA_FROM_DEVICE); - - skb_put(skb, ds->ds_rxstat.rs_datalen); - skb->protocol = cpu_to_be16(ETH_P_CONTROL); - - /* see if any padding is done by the hw and remove it */ - hdr = (struct ieee80211_hdr *)skb->data; - hdrlen = ieee80211_get_hdrlen_from_skb(skb); - fc = hdr->frame_control; - - /* The MAC header is padded to have 32-bit boundary if the - * packet payload is non-zero. The general calculation for - * padsize would take into account odd header lengths: - * padsize = (4 - hdrlen % 4) % 4; However, since only - * even-length headers are used, padding can only be 0 or 2 - * bytes and we can optimize this a bit. In addition, we must - * not try to remove padding from short control frames that do - * not have payload. */ - padsize = hdrlen & 3; - if (padsize && hdrlen >= 24) { - memmove(skb->data + padsize, skb->data, hdrlen); - skb_pull(skb, padsize); - } - - keyix = ds->ds_rxstat.rs_keyix; - - if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error) { - rx_status.flag |= RX_FLAG_DECRYPTED; - } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED) - && !decrypt_error && skb->len >= hdrlen + 4) { - keyix = skb->data[hdrlen + 3] >> 6; - - if (test_bit(keyix, sc->keymap)) - rx_status.flag |= RX_FLAG_DECRYPTED; - } - if (ah->sw_mgmt_crypto && - (rx_status.flag & RX_FLAG_DECRYPTED) && - ieee80211_is_mgmt(hdr->frame_control)) { - /* Use software decrypt for management frames. */ - rx_status.flag &= ~RX_FLAG_DECRYPTED; - } - - /* Send the frame to mac80211 */ - if (hdr->addr1[5] & 0x01) { - int i; - /* - * Deliver broadcast/multicast frames to all suitable - * virtual wiphys. - */ - /* TODO: filter based on channel configuration */ - for (i = 0; i < sc->num_sec_wiphy; i++) { - struct ath_wiphy *aphy = sc->sec_wiphy[i]; - struct sk_buff *nskb; - if (aphy == NULL) - continue; - nskb = skb_copy(skb, GFP_ATOMIC); - if (nskb) - __ieee80211_rx(aphy->hw, nskb, - &rx_status); - } - __ieee80211_rx(sc->hw, skb, &rx_status); - } else { - /* Deliver unicast frames based on receiver address */ - __ieee80211_rx(ath_get_virt_hw(sc, hdr), skb, - &rx_status); - } - - /* We will now give hardware our shiny new allocated skb */ - bf->bf_mpdu = requeue_skb; - bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data, - sc->rx.bufsize, - DMA_FROM_DEVICE); - if (unlikely(dma_mapping_error(sc->dev, - bf->bf_buf_addr))) { - dev_kfree_skb_any(requeue_skb); - bf->bf_mpdu = NULL; - DPRINTF(sc, ATH_DBG_FATAL, - "dma_mapping_error() on RX\n"); - break; - } - bf->bf_dmacontext = bf->bf_buf_addr; - - /* - * change the default rx antenna if rx diversity chooses the - * other antenna 3 times in a row. - */ - if (sc->rx.defant != ds->ds_rxstat.rs_antenna) { - if (++sc->rx.rxotherant >= 3) - ath_setdefantenna(sc, ds->ds_rxstat.rs_antenna); - } else { - sc->rx.rxotherant = 0; - } - - if (ieee80211_is_beacon(fc) && - (sc->sc_flags & SC_OP_WAIT_FOR_BEACON)) { - sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON; - ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP); - } -requeue: - list_move_tail(&bf->list, &sc->rx.rxbuf); - ath_rx_buf_link(sc, bf); - } while (1); - - spin_unlock_bh(&sc->rx.rxbuflock); - - return 0; -#undef PA2DESC -} |