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path: root/drivers/net/wireless/mwifiex/sta_tx.c
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Diffstat (limited to 'drivers/net/wireless/mwifiex/sta_tx.c')
-rw-r--r--drivers/net/wireless/mwifiex/sta_tx.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/sta_tx.c b/drivers/net/wireless/mwifiex/sta_tx.c
new file mode 100644
index 000000000000..e8db6bd021c6
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/sta_tx.c
@@ -0,0 +1,202 @@
+/*
+ * Marvell Wireless LAN device driver: station TX data handling
+ *
+ * Copyright (C) 2011, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+
+/*
+ * This function fills the TxPD for tx packets.
+ *
+ * The Tx buffer received by this function should already have the
+ * header space allocated for TxPD.
+ *
+ * This function inserts the TxPD in between interface header and actual
+ * data and adjusts the buffer pointers accordingly.
+ *
+ * The following TxPD fields are set by this function, as required -
+ * - BSS number
+ * - Tx packet length and offset
+ * - Priority
+ * - Packet delay
+ * - Priority specific Tx control
+ * - Flags
+ */
+void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
+ struct sk_buff *skb)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+ struct txpd *local_tx_pd;
+ struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
+
+ if (!skb->len) {
+ dev_err(adapter->dev, "Tx: bad packet length: %d\n",
+ skb->len);
+ tx_info->status_code = MWIFIEX_ERROR_PKT_SIZE_INVALID;
+ return skb->data;
+ }
+
+ BUG_ON(skb_headroom(skb) < (sizeof(*local_tx_pd) + INTF_HEADER_LEN));
+ skb_push(skb, sizeof(*local_tx_pd));
+
+ local_tx_pd = (struct txpd *) skb->data;
+ memset(local_tx_pd, 0, sizeof(struct txpd));
+ local_tx_pd->bss_num = priv->bss_num;
+ local_tx_pd->bss_type = priv->bss_type;
+ local_tx_pd->tx_pkt_length = cpu_to_le16((u16) (skb->len -
+ sizeof(struct txpd)));
+
+ local_tx_pd->priority = (u8) skb->priority;
+ local_tx_pd->pkt_delay_2ms =
+ mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
+
+ if (local_tx_pd->priority <
+ ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
+ /*
+ * Set the priority specific tx_control field, setting of 0 will
+ * cause the default value to be used later in this function
+ */
+ local_tx_pd->tx_control =
+ cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
+ priority]);
+
+ if (adapter->pps_uapsd_mode) {
+ if (mwifiex_check_last_packet_indication(priv)) {
+ adapter->tx_lock_flag = true;
+ local_tx_pd->flags =
+ MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
+ }
+ }
+
+ /* Offset of actual data */
+ local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
+
+ /* make space for INTF_HEADER_LEN */
+ skb_push(skb, INTF_HEADER_LEN);
+
+ if (!local_tx_pd->tx_control)
+ /* TxCtrl set by user or default */
+ local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
+
+ return skb->data;
+}
+
+/*
+ * This function tells firmware to send a NULL data packet.
+ *
+ * The function creates a NULL data packet with TxPD and sends to the
+ * firmware for transmission, with highest priority setting.
+ */
+int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+ struct txpd *local_tx_pd;
+/* sizeof(struct txpd) + Interface specific header */
+#define NULL_PACKET_HDR 64
+ u32 data_len = NULL_PACKET_HDR;
+ struct sk_buff *skb = NULL;
+ int ret = 0;
+ struct mwifiex_txinfo *tx_info = NULL;
+
+ if (adapter->surprise_removed)
+ return -1;
+
+ if (!priv->media_connected)
+ return -1;
+
+ if (adapter->data_sent)
+ return -1;
+
+ skb = dev_alloc_skb(data_len);
+ if (!skb)
+ return -1;
+
+ tx_info = MWIFIEX_SKB_TXCB(skb);
+ tx_info->bss_index = priv->bss_index;
+ skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN);
+ skb_push(skb, sizeof(struct txpd));
+
+ local_tx_pd = (struct txpd *) skb->data;
+ local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
+ local_tx_pd->flags = flags;
+ local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
+ local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
+ local_tx_pd->bss_num = priv->bss_num;
+ local_tx_pd->bss_type = priv->bss_type;
+
+ skb_push(skb, INTF_HEADER_LEN);
+
+ ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
+ skb->data, skb->len, NULL);
+ switch (ret) {
+ case -EBUSY:
+ adapter->data_sent = true;
+ /* Fall through FAILURE handling */
+ case -1:
+ dev_kfree_skb_any(skb);
+ dev_err(adapter->dev, "%s: host_to_card failed: ret=%d\n",
+ __func__, ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ break;
+ case 0:
+ dev_kfree_skb_any(skb);
+ dev_dbg(adapter->dev, "data: %s: host_to_card succeeded\n",
+ __func__);
+ adapter->tx_lock_flag = true;
+ break;
+ case -EINPROGRESS:
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * This function checks if we need to send last packet indication.
+ */
+u8
+mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+ u8 ret = false;
+ u8 prop_ps = true;
+
+ if (!adapter->sleep_period.period)
+ return ret;
+ if (mwifiex_wmm_lists_empty(adapter)) {
+ if ((priv->curr_bss_params.wmm_uapsd_enabled &&
+ priv->wmm_qosinfo) || prop_ps)
+ ret = true;
+ }
+
+ if (ret && !adapter->cmd_sent && !adapter->curr_cmd
+ && !is_command_pending(adapter)) {
+ adapter->delay_null_pkt = false;
+ ret = true;
+ } else {
+ ret = false;
+ adapter->delay_null_pkt = true;
+ }
+ return ret;
+}