1 /* 2 * Marvell Wireless LAN device driver: station TX data handling 3 * 4 * Copyright (C) 2011-2014, Marvell International Ltd. 5 * 6 * This software file (the "File") is distributed by Marvell International 7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 17 * this warranty disclaimer. 18 */ 19 20 #include "decl.h" 21 #include "ioctl.h" 22 #include "util.h" 23 #include "fw.h" 24 #include "main.h" 25 #include "wmm.h" 26 27 /* 28 * This function fills the TxPD for tx packets. 29 * 30 * The Tx buffer received by this function should already have the 31 * header space allocated for TxPD. 32 * 33 * This function inserts the TxPD in between interface header and actual 34 * data and adjusts the buffer pointers accordingly. 35 * 36 * The following TxPD fields are set by this function, as required - 37 * - BSS number 38 * - Tx packet length and offset 39 * - Priority 40 * - Packet delay 41 * - Priority specific Tx control 42 * - Flags 43 */ 44 void *mwifiex_process_sta_txpd(struct mwifiex_private *priv, 45 struct sk_buff *skb) 46 { 47 struct mwifiex_adapter *adapter = priv->adapter; 48 struct txpd *local_tx_pd; 49 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); 50 unsigned int pad; 51 u16 pkt_type, pkt_offset; 52 int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 : 53 INTF_HEADER_LEN; 54 55 if (!skb->len) { 56 mwifiex_dbg(adapter, ERROR, 57 "Tx: bad packet length: %d\n", skb->len); 58 tx_info->status_code = -1; 59 return skb->data; 60 } 61 62 BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN); 63 64 pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; 65 66 pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)- 67 NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1); 68 skb_push(skb, sizeof(*local_tx_pd) + pad); 69 70 local_tx_pd = (struct txpd *) skb->data; 71 memset(local_tx_pd, 0, sizeof(struct txpd)); 72 local_tx_pd->bss_num = priv->bss_num; 73 local_tx_pd->bss_type = priv->bss_type; 74 local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len - 75 (sizeof(struct txpd) + 76 pad))); 77 78 local_tx_pd->priority = (u8) skb->priority; 79 local_tx_pd->pkt_delay_2ms = 80 mwifiex_wmm_compute_drv_pkt_delay(priv, skb); 81 82 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS || 83 tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) { 84 local_tx_pd->tx_token_id = tx_info->ack_frame_id; 85 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS; 86 } 87 88 if (local_tx_pd->priority < 89 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) 90 /* 91 * Set the priority specific tx_control field, setting of 0 will 92 * cause the default value to be used later in this function 93 */ 94 local_tx_pd->tx_control = 95 cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd-> 96 priority]); 97 98 if (adapter->pps_uapsd_mode) { 99 if (mwifiex_check_last_packet_indication(priv)) { 100 adapter->tx_lock_flag = true; 101 local_tx_pd->flags = 102 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET; 103 } 104 } 105 106 if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT) 107 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET; 108 109 /* Offset of actual data */ 110 pkt_offset = sizeof(struct txpd) + pad; 111 if (pkt_type == PKT_TYPE_MGMT) { 112 /* Set the packet type and add header for management frame */ 113 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type); 114 pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE; 115 } 116 117 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset); 118 119 /* make space for INTF_HEADER_LEN */ 120 skb_push(skb, hroom); 121 122 if (!local_tx_pd->tx_control) 123 /* TxCtrl set by user or default */ 124 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 125 126 return skb->data; 127 } 128 129 /* 130 * This function tells firmware to send a NULL data packet. 131 * 132 * The function creates a NULL data packet with TxPD and sends to the 133 * firmware for transmission, with highest priority setting. 134 */ 135 int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags) 136 { 137 struct mwifiex_adapter *adapter = priv->adapter; 138 struct txpd *local_tx_pd; 139 struct mwifiex_tx_param tx_param; 140 /* sizeof(struct txpd) + Interface specific header */ 141 #define NULL_PACKET_HDR 64 142 u32 data_len = NULL_PACKET_HDR; 143 struct sk_buff *skb; 144 int ret; 145 struct mwifiex_txinfo *tx_info = NULL; 146 147 if (adapter->surprise_removed) 148 return -1; 149 150 if (!priv->media_connected) 151 return -1; 152 153 if (adapter->data_sent) 154 return -1; 155 156 if (adapter->if_ops.is_port_ready && 157 !adapter->if_ops.is_port_ready(priv)) 158 return -1; 159 160 skb = dev_alloc_skb(data_len); 161 if (!skb) 162 return -1; 163 164 tx_info = MWIFIEX_SKB_TXCB(skb); 165 memset(tx_info, 0, sizeof(*tx_info)); 166 tx_info->bss_num = priv->bss_num; 167 tx_info->bss_type = priv->bss_type; 168 tx_info->pkt_len = data_len - (sizeof(struct txpd) + INTF_HEADER_LEN); 169 skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN); 170 skb_push(skb, sizeof(struct txpd)); 171 172 local_tx_pd = (struct txpd *) skb->data; 173 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 174 local_tx_pd->flags = flags; 175 local_tx_pd->priority = WMM_HIGHEST_PRIORITY; 176 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd)); 177 local_tx_pd->bss_num = priv->bss_num; 178 local_tx_pd->bss_type = priv->bss_type; 179 180 if (adapter->iface_type == MWIFIEX_USB) { 181 ret = adapter->if_ops.host_to_card(adapter, priv->usb_port, 182 skb, NULL); 183 } else { 184 skb_push(skb, INTF_HEADER_LEN); 185 tx_param.next_pkt_len = 0; 186 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, 187 skb, &tx_param); 188 } 189 switch (ret) { 190 case -EBUSY: 191 dev_kfree_skb_any(skb); 192 mwifiex_dbg(adapter, ERROR, 193 "%s: host_to_card failed: ret=%d\n", 194 __func__, ret); 195 adapter->dbg.num_tx_host_to_card_failure++; 196 break; 197 case -1: 198 dev_kfree_skb_any(skb); 199 mwifiex_dbg(adapter, ERROR, 200 "%s: host_to_card failed: ret=%d\n", 201 __func__, ret); 202 adapter->dbg.num_tx_host_to_card_failure++; 203 break; 204 case 0: 205 dev_kfree_skb_any(skb); 206 mwifiex_dbg(adapter, DATA, 207 "data: %s: host_to_card succeeded\n", 208 __func__); 209 adapter->tx_lock_flag = true; 210 break; 211 case -EINPROGRESS: 212 adapter->tx_lock_flag = true; 213 break; 214 default: 215 break; 216 } 217 218 return ret; 219 } 220 221 /* 222 * This function checks if we need to send last packet indication. 223 */ 224 u8 225 mwifiex_check_last_packet_indication(struct mwifiex_private *priv) 226 { 227 struct mwifiex_adapter *adapter = priv->adapter; 228 u8 ret = false; 229 230 if (!adapter->sleep_period.period) 231 return ret; 232 if (mwifiex_wmm_lists_empty(adapter)) 233 ret = true; 234 235 if (ret && !adapter->cmd_sent && !adapter->curr_cmd && 236 !is_command_pending(adapter)) { 237 adapter->delay_null_pkt = false; 238 ret = true; 239 } else { 240 ret = false; 241 adapter->delay_null_pkt = true; 242 } 243 return ret; 244 } 245