cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/ti/wl18xx/tx.c

/*
 * This file is part of wl18xx
 *
 * Copyright (C) 2011 Texas Instruments Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "../wlcore/wlcore.h"
#include "../wlcore/cmd.h"
#include "../wlcore/debug.h"
#include "../wlcore/acx.h"
#include "../wlcore/tx.h"

#include "wl18xx.h"
#include "tx.h"


static void wl18xx_get_last_tx_rate(struct wl1271 *wl, struct ieee80211_vif *vif, u8 band, struct ieee80211_tx_rate *rate, u8 hlid) { u8 fw_rate = wl->links[hlid].fw_rate_idx; if (fw_rate > CONF_HW_RATE_INDEX_MAX) { wl1271_error("last Tx rate invalid: %d", fw_rate); rate->idx = 0; rate->flags = 0; return; } if (fw_rate <= CONF_HW_RATE_INDEX_54MBPS) { rate->idx = fw_rate; if (band == NL80211_BAND_5GHZ) rate->idx -= CONF_HW_RATE_INDEX_6MBPS; rate->flags = 0; } else { rate->flags = IEEE80211_TX_RC_MCS; rate->idx = fw_rate - CONF_HW_RATE_INDEX_MCS0; /* SGI modifier is counted as a separate rate */ if (fw_rate >= CONF_HW_RATE_INDEX_MCS7_SGI) (rate->idx)--; if (fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI) (rate->idx)--; /* this also covers the 40Mhz SGI case (= MCS15) */ if (fw_rate == CONF_HW_RATE_INDEX_MCS7_SGI || fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI) rate->flags |= IEEE80211_TX_RC_SHORT_GI; if (fw_rate > CONF_HW_RATE_INDEX_MCS7_SGI && vif) { struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); if (wlvif->channel_type == NL80211_CHAN_HT40MINUS || wlvif->channel_type == NL80211_CHAN_HT40PLUS) { /* adjustment needed for range 0-7 */ rate->idx -= 8; rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; } } } }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov18689.00%125.00%
Eliad Peller146.70%125.00%
Maxim Altshul83.83%125.00%
Johannes Berg10.48%125.00%
Total209100.00%4100.00%


static void wl18xx_tx_complete_packet(struct wl1271 *wl, u8 tx_stat_byte) { struct ieee80211_tx_info *info; struct sk_buff *skb; int id = tx_stat_byte & WL18XX_TX_STATUS_DESC_ID_MASK; bool tx_success; struct wl1271_tx_hw_descr *tx_desc; /* check for id legality */ if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) { wl1271_warning("illegal id in tx completion: %d", id); return; } /* a zero bit indicates Tx success */ tx_success = !(tx_stat_byte & BIT(WL18XX_TX_STATUS_STAT_BIT_IDX)); skb = wl->tx_frames[id]; info = IEEE80211_SKB_CB(skb); tx_desc = (struct wl1271_tx_hw_descr *)skb->data; if (wl12xx_is_dummy_packet(wl, skb)) { wl1271_free_tx_id(wl, id); return; } /* update the TX status info */ if (tx_success && !(info->flags & IEEE80211_TX_CTL_NO_ACK)) info->flags |= IEEE80211_TX_STAT_ACK; /* * first pass info->control.vif while it's valid, and then fill out * the info->status structures */ wl18xx_get_last_tx_rate(wl, info->control.vif, info->band, &info->status.rates[0], tx_desc->hlid); info->status.rates[0].count = 1; /* no data about retries */ info->status.ack_signal = -1; if (!tx_success) wl->stats.retry_count++; /* * TODO: update sequence number for encryption? seems to be * unsupported for now. needed for recovery with encryption. */ /* remove private header from packet */ skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); /* remove TKIP header space if present */ if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && info->control.hw_key && info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { int hdrlen = ieee80211_get_hdrlen_from_skb(skb); memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, hdrlen); skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); } wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p success %d", id, skb, tx_success); /* return the packet to the stack */ skb_queue_tail(&wl->deferred_tx_queue, skb); queue_work(wl->freezable_wq, &wl->netstack_work); wl1271_free_tx_id(wl, id); }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov30592.71%360.00%
Maxim Altshul206.08%120.00%
Eliad Peller41.22%120.00%
Total329100.00%5100.00%


void wl18xx_tx_immediate_complete(struct wl1271 *wl) { struct wl18xx_fw_status_priv *status_priv = (struct wl18xx_fw_status_priv *)wl->fw_status->priv; struct wl18xx_priv *priv = wl->priv; u8 i, hlid; /* nothing to do here */ if (priv->last_fw_rls_idx == status_priv->fw_release_idx) return; /* update rates per link */ hlid = wl->fw_status->counters.hlid; if (hlid < WLCORE_MAX_LINKS) { wl->links[hlid].fw_rate_idx = wl->fw_status->counters.tx_last_rate; wl->links[hlid].fw_rate_mbps = wl->fw_status->counters.tx_last_rate_mbps; } /* freed Tx descriptors */ wl1271_debug(DEBUG_TX, "last released desc = %d, current idx = %d", priv->last_fw_rls_idx, status_priv->fw_release_idx); if (status_priv->fw_release_idx >= WL18XX_FW_MAX_TX_STATUS_DESC) { wl1271_error("invalid desc release index %d", status_priv->fw_release_idx); WARN_ON(1); return; } for (i = priv->last_fw_rls_idx; i != status_priv->fw_release_idx; i = (i + 1) % WL18XX_FW_MAX_TX_STATUS_DESC) { wl18xx_tx_complete_packet(wl, status_priv->released_tx_desc[i]); wl->tx_results_count++; } priv->last_fw_rls_idx = status_priv->fw_release_idx; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov14171.57%133.33%
Maxim Altshul5527.92%133.33%
Eliad Peller10.51%133.33%
Total197100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov65486.39%342.86%
Maxim Altshul8310.96%114.29%
Eliad Peller192.51%228.57%
Johannes Berg10.13%114.29%
Total757100.00%7100.00%
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