1 files changed, 198 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..fa6221bc9104
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/sta_tx.c
@@ -0,0 +1,198 @@
+/*
+ * 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 = -1;
+                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;
+        int ret;
+        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;
+
+        if (!adapter->sleep_period.period)
+                return ret;
+        if (mwifiex_wmm_lists_empty(adapter))
+                        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;
+}