summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ti/wl18xx/tx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/ti/wl18xx/tx.c')
-rw-r--r--drivers/net/wireless/ti/wl18xx/tx.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/net/wireless/ti/wl18xx/tx.c b/drivers/net/wireless/ti/wl18xx/tx.c
new file mode 100644
index 000000000000..5b1fb10d9fd7
--- /dev/null
+++ b/drivers/net/wireless/ti/wl18xx/tx.c
@@ -0,0 +1,127 @@
+/*
+ * 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_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;
+
+ /* 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);
+
+ 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;
+
+ /* no real data about Tx completion */
+ info->status.rates[0].idx = -1;
+ info->status.rates[0].count = 0;
+ info->status.rates[0].flags = 0;
+ 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);
+}
+
+void wl18xx_tx_immediate_complete(struct wl1271 *wl)
+{
+ struct wl18xx_fw_status_priv *status_priv =
+ (struct wl18xx_fw_status_priv *)wl->fw_status_2->priv;
+ struct wl18xx_priv *priv = wl->priv;
+ u8 i;
+
+ /* nothing to do here */
+ if (priv->last_fw_rls_idx == status_priv->fw_release_idx)
+ return;
+
+ /* 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;
+}