forked from Minki/linux
2c0133a437
18xx chips do not require extra space in the TKIP header. Introduce a new HW quirk to allow us to make this feature arch-specific. 12xx chip will now have this quirk. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
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* This file is part of wl18xx
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*
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* Copyright (C) 2011 Texas Instruments Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include "../wlcore/wlcore.h"
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#include "../wlcore/cmd.h"
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#include "../wlcore/debug.h"
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#include "../wlcore/acx.h"
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#include "../wlcore/tx.h"
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#include "wl18xx.h"
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#include "tx.h"
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static void wl18xx_tx_complete_packet(struct wl1271 *wl, u8 tx_stat_byte)
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{
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struct ieee80211_tx_info *info;
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struct sk_buff *skb;
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int id = tx_stat_byte & WL18XX_TX_STATUS_DESC_ID_MASK;
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bool tx_success;
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/* check for id legality */
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if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
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wl1271_warning("illegal id in tx completion: %d", id);
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return;
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}
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/* a zero bit indicates Tx success */
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tx_success = !(tx_stat_byte & BIT(WL18XX_TX_STATUS_STAT_BIT_IDX));
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skb = wl->tx_frames[id];
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info = IEEE80211_SKB_CB(skb);
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if (wl12xx_is_dummy_packet(wl, skb)) {
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wl1271_free_tx_id(wl, id);
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return;
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}
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/* update the TX status info */
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if (tx_success && !(info->flags & IEEE80211_TX_CTL_NO_ACK))
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info->flags |= IEEE80211_TX_STAT_ACK;
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/* no real data about Tx completion */
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info->status.rates[0].idx = -1;
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info->status.rates[0].count = 0;
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info->status.rates[0].flags = 0;
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info->status.ack_signal = -1;
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if (!tx_success)
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wl->stats.retry_count++;
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/*
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* TODO: update sequence number for encryption? seems to be
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* unsupported for now. needed for recovery with encryption.
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*/
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/* remove private header from packet */
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skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
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/* remove TKIP header space if present */
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if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
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info->control.hw_key &&
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info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
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int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
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memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, hdrlen);
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skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
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}
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wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p success %d",
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id, skb, tx_success);
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/* return the packet to the stack */
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skb_queue_tail(&wl->deferred_tx_queue, skb);
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queue_work(wl->freezable_wq, &wl->netstack_work);
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wl1271_free_tx_id(wl, id);
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}
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void wl18xx_tx_immediate_complete(struct wl1271 *wl)
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{
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struct wl18xx_fw_status_priv *status_priv =
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(struct wl18xx_fw_status_priv *)wl->fw_status_2->priv;
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struct wl18xx_priv *priv = wl->priv;
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u8 i;
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/* nothing to do here */
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if (priv->last_fw_rls_idx == status_priv->fw_release_idx)
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return;
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/* freed Tx descriptors */
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wl1271_debug(DEBUG_TX, "last released desc = %d, current idx = %d",
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priv->last_fw_rls_idx, status_priv->fw_release_idx);
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if (status_priv->fw_release_idx >= WL18XX_FW_MAX_TX_STATUS_DESC) {
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wl1271_error("invalid desc release index %d",
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status_priv->fw_release_idx);
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WARN_ON(1);
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return;
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}
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for (i = priv->last_fw_rls_idx;
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i != status_priv->fw_release_idx;
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i = (i + 1) % WL18XX_FW_MAX_TX_STATUS_DESC) {
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wl18xx_tx_complete_packet(wl,
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status_priv->released_tx_desc[i]);
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wl->tx_results_count++;
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}
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priv->last_fw_rls_idx = status_priv->fw_release_idx;
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}
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