Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

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;
+}