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 */ 44void *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 dev_err(adapter->dev, "Tx: bad packet length: %d\n", skb->len); 57 tx_info->status_code = -1; 58 return skb->data; 59 } 60 61 BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN); 62 63 pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; 64 65 pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)- 66 NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1); 67 skb_push(skb, sizeof(*local_tx_pd) + pad); 68 69 local_tx_pd = (struct txpd *) skb->data; 70 memset(local_tx_pd, 0, sizeof(struct txpd)); 71 local_tx_pd->bss_num = priv->bss_num; 72 local_tx_pd->bss_type = priv->bss_type; 73 local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len - 74 (sizeof(struct txpd) + 75 pad))); 76 77 local_tx_pd->priority = (u8) skb->priority; 78 local_tx_pd->pkt_delay_2ms = 79 mwifiex_wmm_compute_drv_pkt_delay(priv, skb); 80 81 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS || 82 tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) { 83 local_tx_pd->tx_token_id = tx_info->ack_frame_id; 84 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS; 85 } 86 87 if (local_tx_pd->priority < 88 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) 89 /* 90 * Set the priority specific tx_control field, setting of 0 will 91 * cause the default value to be used later in this function 92 */ 93 local_tx_pd->tx_control = 94 cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd-> 95 priority]); 96 97 if (adapter->pps_uapsd_mode) { 98 if (mwifiex_check_last_packet_indication(priv)) { 99 adapter->tx_lock_flag = true; 100 local_tx_pd->flags = 101 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET; 102 } 103 } 104 105 if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT) 106 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET; 107 108 /* Offset of actual data */ 109 pkt_offset = sizeof(struct txpd) + pad; 110 if (pkt_type == PKT_TYPE_MGMT) { 111 /* Set the packet type and add header for management frame */ 112 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type); 113 pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE; 114 } 115 116 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset); 117 118 /* make space for INTF_HEADER_LEN */ 119 skb_push(skb, hroom); 120 121 if (!local_tx_pd->tx_control) 122 /* TxCtrl set by user or default */ 123 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 124 125 return skb->data; 126} 127 128/* 129 * This function tells firmware to send a NULL data packet. 130 * 131 * The function creates a NULL data packet with TxPD and sends to the 132 * firmware for transmission, with highest priority setting. 133 */ 134int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags) 135{ 136 struct mwifiex_adapter *adapter = priv->adapter; 137 struct txpd *local_tx_pd; 138 struct mwifiex_tx_param tx_param; 139/* sizeof(struct txpd) + Interface specific header */ 140#define NULL_PACKET_HDR 64 141 u32 data_len = NULL_PACKET_HDR; 142 struct sk_buff *skb; 143 int ret; 144 struct mwifiex_txinfo *tx_info = NULL; 145 146 if (adapter->surprise_removed) 147 return -1; 148 149 if (!priv->media_connected) 150 return -1; 151 152 if (adapter->data_sent) 153 return -1; 154 155 skb = dev_alloc_skb(data_len); 156 if (!skb) 157 return -1; 158 159 tx_info = MWIFIEX_SKB_TXCB(skb); 160 memset(tx_info, 0, sizeof(*tx_info)); 161 tx_info->bss_num = priv->bss_num; 162 tx_info->bss_type = priv->bss_type; 163 tx_info->pkt_len = data_len - (sizeof(struct txpd) + INTF_HEADER_LEN); 164 skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN); 165 skb_push(skb, sizeof(struct txpd)); 166 167 local_tx_pd = (struct txpd *) skb->data; 168 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 169 local_tx_pd->flags = flags; 170 local_tx_pd->priority = WMM_HIGHEST_PRIORITY; 171 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd)); 172 local_tx_pd->bss_num = priv->bss_num; 173 local_tx_pd->bss_type = priv->bss_type; 174 175 if (adapter->iface_type == MWIFIEX_USB) { 176 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA, 177 skb, NULL); 178 } else { 179 skb_push(skb, INTF_HEADER_LEN); 180 tx_param.next_pkt_len = 0; 181 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, 182 skb, &tx_param); 183 } 184 switch (ret) { 185 case -EBUSY: 186 dev_kfree_skb_any(skb); 187 dev_err(adapter->dev, "%s: host_to_card failed: ret=%d\n", 188 __func__, ret); 189 adapter->dbg.num_tx_host_to_card_failure++; 190 break; 191 case -1: 192 adapter->data_sent = false; 193 dev_kfree_skb_any(skb); 194 dev_err(adapter->dev, "%s: host_to_card failed: ret=%d\n", 195 __func__, ret); 196 adapter->dbg.num_tx_host_to_card_failure++; 197 break; 198 case 0: 199 dev_kfree_skb_any(skb); 200 dev_dbg(adapter->dev, "data: %s: host_to_card succeeded\n", 201 __func__); 202 adapter->tx_lock_flag = true; 203 break; 204 case -EINPROGRESS: 205 adapter->tx_lock_flag = true; 206 break; 207 default: 208 break; 209 } 210 211 return ret; 212} 213 214/* 215 * This function checks if we need to send last packet indication. 216 */ 217u8 218mwifiex_check_last_packet_indication(struct mwifiex_private *priv) 219{ 220 struct mwifiex_adapter *adapter = priv->adapter; 221 u8 ret = false; 222 223 if (!adapter->sleep_period.period) 224 return ret; 225 if (mwifiex_wmm_lists_empty(adapter)) 226 ret = true; 227 228 if (ret && !adapter->cmd_sent && !adapter->curr_cmd && 229 !is_command_pending(adapter)) { 230 adapter->delay_null_pkt = false; 231 ret = true; 232 } else { 233 ret = false; 234 adapter->delay_null_pkt = true; 235 } 236 return ret; 237} 238