400 lines
9.8 KiB
C
400 lines
9.8 KiB
C
/*
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* Copyright (c) 2005-2011 Atheros Communications Inc.
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* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or 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 "core.h"
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#include "txrx.h"
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#include "htt.h"
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#include "mac.h"
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#include "debug.h"
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static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
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{
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if (!ATH10K_SKB_CB(skb)->htt.is_offchan)
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return;
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/* If the original wait_for_completion() timed out before
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* {data,mgmt}_tx_completed() was called then we could complete
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* offchan_tx_completed for a different skb. Prevent this by using
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* offchan_tx_skb. */
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spin_lock_bh(&ar->data_lock);
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if (ar->offchan_tx_skb != skb) {
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ath10k_warn("completed old offchannel frame\n");
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goto out;
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}
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complete(&ar->offchan_tx_completed);
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ar->offchan_tx_skb = NULL; /* just for sanity */
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ath10k_dbg(ATH10K_DBG_HTT, "completed offchannel skb %p\n", skb);
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out:
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spin_unlock_bh(&ar->data_lock);
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}
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void ath10k_txrx_tx_unref(struct ath10k_htt *htt,
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const struct htt_tx_done *tx_done)
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{
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struct device *dev = htt->ar->dev;
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struct ieee80211_tx_info *info;
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struct ath10k_skb_cb *skb_cb;
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struct sk_buff *msdu;
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int ret;
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ath10k_dbg(ATH10K_DBG_HTT, "htt tx completion msdu_id %u discard %d no_ack %d\n",
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tx_done->msdu_id, !!tx_done->discard, !!tx_done->no_ack);
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if (tx_done->msdu_id >= htt->max_num_pending_tx) {
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ath10k_warn("warning: msdu_id %d too big, ignoring\n",
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tx_done->msdu_id);
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return;
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}
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msdu = htt->pending_tx[tx_done->msdu_id];
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skb_cb = ATH10K_SKB_CB(msdu);
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ret = ath10k_skb_unmap(dev, msdu);
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if (ret)
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ath10k_warn("data skb unmap failed (%d)\n", ret);
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if (skb_cb->htt.frag_len)
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skb_pull(msdu, skb_cb->htt.frag_len + skb_cb->htt.pad_len);
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ath10k_report_offchan_tx(htt->ar, msdu);
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info = IEEE80211_SKB_CB(msdu);
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memset(&info->status, 0, sizeof(info->status));
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if (tx_done->discard) {
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ieee80211_free_txskb(htt->ar->hw, msdu);
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goto exit;
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}
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if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
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info->flags |= IEEE80211_TX_STAT_ACK;
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if (tx_done->no_ack)
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info->flags &= ~IEEE80211_TX_STAT_ACK;
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ieee80211_tx_status(htt->ar->hw, msdu);
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/* we do not own the msdu anymore */
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exit:
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spin_lock_bh(&htt->tx_lock);
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htt->pending_tx[tx_done->msdu_id] = NULL;
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ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
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__ath10k_htt_tx_dec_pending(htt);
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if (htt->num_pending_tx == 0)
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wake_up(&htt->empty_tx_wq);
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spin_unlock_bh(&htt->tx_lock);
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}
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static const u8 rx_legacy_rate_idx[] = {
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3, /* 0x00 - 11Mbps */
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2, /* 0x01 - 5.5Mbps */
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1, /* 0x02 - 2Mbps */
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0, /* 0x03 - 1Mbps */
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3, /* 0x04 - 11Mbps */
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2, /* 0x05 - 5.5Mbps */
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1, /* 0x06 - 2Mbps */
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0, /* 0x07 - 1Mbps */
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10, /* 0x08 - 48Mbps */
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8, /* 0x09 - 24Mbps */
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6, /* 0x0A - 12Mbps */
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4, /* 0x0B - 6Mbps */
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11, /* 0x0C - 54Mbps */
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9, /* 0x0D - 36Mbps */
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7, /* 0x0E - 18Mbps */
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5, /* 0x0F - 9Mbps */
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};
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static void process_rx_rates(struct ath10k *ar, struct htt_rx_info *info,
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enum ieee80211_band band,
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struct ieee80211_rx_status *status)
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{
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u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
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u8 info0 = info->rate.info0;
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u32 info1 = info->rate.info1;
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u32 info2 = info->rate.info2;
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u8 preamble = 0;
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/* Check if valid fields */
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if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
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return;
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preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
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switch (preamble) {
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case HTT_RX_LEGACY:
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cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
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rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
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rate_idx = 0;
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if (rate < 0x08 || rate > 0x0F)
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break;
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switch (band) {
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case IEEE80211_BAND_2GHZ:
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if (cck)
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rate &= ~BIT(3);
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rate_idx = rx_legacy_rate_idx[rate];
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break;
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case IEEE80211_BAND_5GHZ:
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rate_idx = rx_legacy_rate_idx[rate];
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/* We are using same rate table registering
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HW - ath10k_rates[]. In case of 5GHz skip
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CCK rates, so -4 here */
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rate_idx -= 4;
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break;
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default:
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break;
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}
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status->rate_idx = rate_idx;
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break;
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case HTT_RX_HT:
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case HTT_RX_HT_WITH_TXBF:
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/* HT-SIG - Table 20-11 in info1 and info2 */
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mcs = info1 & 0x1F;
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nss = mcs >> 3;
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bw = (info1 >> 7) & 1;
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sgi = (info2 >> 7) & 1;
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status->rate_idx = mcs;
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status->flag |= RX_FLAG_HT;
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if (sgi)
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status->flag |= RX_FLAG_SHORT_GI;
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if (bw)
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status->flag |= RX_FLAG_40MHZ;
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break;
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case HTT_RX_VHT:
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case HTT_RX_VHT_WITH_TXBF:
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/* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
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TODO check this */
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mcs = (info2 >> 4) & 0x0F;
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nss = ((info1 >> 10) & 0x07) + 1;
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bw = info1 & 3;
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sgi = info2 & 1;
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status->rate_idx = mcs;
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status->vht_nss = nss;
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if (sgi)
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status->flag |= RX_FLAG_SHORT_GI;
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switch (bw) {
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/* 20MHZ */
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case 0:
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break;
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/* 40MHZ */
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case 1:
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status->flag |= RX_FLAG_40MHZ;
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break;
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/* 80MHZ */
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case 2:
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status->vht_flag |= RX_VHT_FLAG_80MHZ;
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}
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status->flag |= RX_FLAG_VHT;
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break;
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default:
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break;
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}
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}
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void ath10k_process_rx(struct ath10k *ar, struct htt_rx_info *info)
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{
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struct ieee80211_rx_status *status;
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struct ieee80211_channel *ch;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)info->skb->data;
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status = IEEE80211_SKB_RXCB(info->skb);
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memset(status, 0, sizeof(*status));
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if (info->encrypt_type != HTT_RX_MPDU_ENCRYPT_NONE) {
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status->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED |
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RX_FLAG_MMIC_STRIPPED;
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hdr->frame_control = __cpu_to_le16(
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__le16_to_cpu(hdr->frame_control) &
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~IEEE80211_FCTL_PROTECTED);
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}
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if (info->mic_err)
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status->flag |= RX_FLAG_MMIC_ERROR;
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if (info->fcs_err)
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status->flag |= RX_FLAG_FAILED_FCS_CRC;
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if (info->amsdu_more)
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status->flag |= RX_FLAG_AMSDU_MORE;
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status->signal = info->signal;
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spin_lock_bh(&ar->data_lock);
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ch = ar->scan_channel;
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if (!ch)
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ch = ar->rx_channel;
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spin_unlock_bh(&ar->data_lock);
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if (!ch) {
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ath10k_warn("no channel configured; ignoring frame!\n");
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dev_kfree_skb_any(info->skb);
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return;
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}
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process_rx_rates(ar, info, ch->band, status);
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status->band = ch->band;
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status->freq = ch->center_freq;
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ath10k_dbg(ATH10K_DBG_DATA,
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"rx skb %p len %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i\n",
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info->skb,
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info->skb->len,
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status->flag == 0 ? "legacy" : "",
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status->flag & RX_FLAG_HT ? "ht" : "",
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status->flag & RX_FLAG_VHT ? "vht" : "",
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status->flag & RX_FLAG_40MHZ ? "40" : "",
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status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
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status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
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status->rate_idx,
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status->vht_nss,
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status->freq,
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status->band, status->flag, info->fcs_err);
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ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
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info->skb->data, info->skb->len);
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ieee80211_rx(ar->hw, info->skb);
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}
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struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
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const u8 *addr)
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{
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struct ath10k_peer *peer;
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lockdep_assert_held(&ar->data_lock);
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list_for_each_entry(peer, &ar->peers, list) {
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if (peer->vdev_id != vdev_id)
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continue;
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if (memcmp(peer->addr, addr, ETH_ALEN))
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continue;
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return peer;
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}
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return NULL;
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}
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static struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar,
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int peer_id)
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{
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struct ath10k_peer *peer;
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lockdep_assert_held(&ar->data_lock);
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list_for_each_entry(peer, &ar->peers, list)
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if (test_bit(peer_id, peer->peer_ids))
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return peer;
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return NULL;
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}
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static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
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const u8 *addr, bool expect_mapped)
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{
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int ret;
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ret = wait_event_timeout(ar->peer_mapping_wq, ({
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bool mapped;
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spin_lock_bh(&ar->data_lock);
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mapped = !!ath10k_peer_find(ar, vdev_id, addr);
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spin_unlock_bh(&ar->data_lock);
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mapped == expect_mapped;
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}), 3*HZ);
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if (ret <= 0)
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return -ETIMEDOUT;
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return 0;
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}
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int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
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{
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return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
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}
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int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
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{
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return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
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}
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void ath10k_peer_map_event(struct ath10k_htt *htt,
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struct htt_peer_map_event *ev)
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{
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struct ath10k *ar = htt->ar;
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struct ath10k_peer *peer;
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spin_lock_bh(&ar->data_lock);
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peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
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if (!peer) {
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peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
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if (!peer)
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goto exit;
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peer->vdev_id = ev->vdev_id;
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memcpy(peer->addr, ev->addr, ETH_ALEN);
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list_add(&peer->list, &ar->peers);
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wake_up(&ar->peer_mapping_wq);
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}
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ath10k_dbg(ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
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ev->vdev_id, ev->addr, ev->peer_id);
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set_bit(ev->peer_id, peer->peer_ids);
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exit:
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spin_unlock_bh(&ar->data_lock);
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}
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void ath10k_peer_unmap_event(struct ath10k_htt *htt,
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struct htt_peer_unmap_event *ev)
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{
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struct ath10k *ar = htt->ar;
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struct ath10k_peer *peer;
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spin_lock_bh(&ar->data_lock);
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peer = ath10k_peer_find_by_id(ar, ev->peer_id);
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if (!peer) {
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ath10k_warn("peer-unmap-event: unknown peer id %d\n",
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ev->peer_id);
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goto exit;
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}
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ath10k_dbg(ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
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peer->vdev_id, peer->addr, ev->peer_id);
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clear_bit(ev->peer_id, peer->peer_ids);
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if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
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list_del(&peer->list);
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kfree(peer);
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wake_up(&ar->peer_mapping_wq);
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}
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exit:
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spin_unlock_bh(&ar->data_lock);
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}
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