1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * NXP Wireless LAN device driver: station TX data handling 4 * 5 * Copyright 2011-2020 NXP 6 */ 7 8 #include "decl.h" 9 #include "ioctl.h" 10 #include "util.h" 11 #include "fw.h" 12 #include "main.h" 13 #include "wmm.h" 14 15 /* 16 * This function fills the TxPD for tx packets. 17 * 18 * The Tx buffer received by this function should already have the 19 * header space allocated for TxPD. 20 * 21 * This function inserts the TxPD in between interface header and actual 22 * data and adjusts the buffer pointers accordingly. 23 * 24 * The following TxPD fields are set by this function, as required - 25 * - BSS number 26 * - Tx packet length and offset 27 * - Priority 28 * - Packet delay 29 * - Priority specific Tx control 30 * - Flags 31 */ 32 void mwifiex_process_sta_txpd(struct mwifiex_private *priv, 33 struct sk_buff *skb) 34 { 35 struct mwifiex_adapter *adapter = priv->adapter; 36 struct txpd *local_tx_pd; 37 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); 38 unsigned int pad; 39 u16 pkt_type, pkt_length, pkt_offset; 40 int hroom = adapter->intf_hdr_len; 41 42 pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; 43 44 pad = ((uintptr_t)skb->data - (sizeof(*local_tx_pd) + hroom)) & 45 (MWIFIEX_DMA_ALIGN_SZ - 1); 46 skb_push(skb, sizeof(*local_tx_pd) + pad); 47 48 local_tx_pd = (struct txpd *) skb->data; 49 memset(local_tx_pd, 0, sizeof(struct txpd)); 50 local_tx_pd->bss_num = priv->bss_num; 51 local_tx_pd->bss_type = priv->bss_type; 52 pkt_length = (u16)(skb->len - (sizeof(struct txpd) + pad)); 53 if (pkt_type == PKT_TYPE_MGMT) 54 pkt_length -= MWIFIEX_MGMT_FRAME_HEADER_SIZE; 55 local_tx_pd->tx_pkt_length = cpu_to_le16(pkt_length); 56 57 local_tx_pd->priority = (u8) skb->priority; 58 local_tx_pd->pkt_delay_2ms = 59 mwifiex_wmm_compute_drv_pkt_delay(priv, skb); 60 61 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS || 62 tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) { 63 local_tx_pd->tx_token_id = tx_info->ack_frame_id; 64 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS; 65 } 66 67 if (local_tx_pd->priority < 68 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) 69 /* 70 * Set the priority specific tx_control field, setting of 0 will 71 * cause the default value to be used later in this function 72 */ 73 local_tx_pd->tx_control = 74 cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd-> 75 priority]); 76 77 if (adapter->pps_uapsd_mode) { 78 if (mwifiex_check_last_packet_indication(priv)) { 79 adapter->tx_lock_flag = true; 80 local_tx_pd->flags = 81 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET; 82 } 83 } 84 85 if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT) 86 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET; 87 88 /* Offset of actual data */ 89 pkt_offset = sizeof(struct txpd) + pad; 90 if (pkt_type == PKT_TYPE_MGMT) { 91 /* Set the packet type and add header for management frame */ 92 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type); 93 pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE; 94 } 95 96 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset); 97 98 /* make space for adapter->intf_hdr_len */ 99 skb_push(skb, hroom); 100 101 if (!local_tx_pd->tx_control) 102 /* TxCtrl set by user or default */ 103 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 104 } 105 106 /* 107 * This function tells firmware to send a NULL data packet. 108 * 109 * The function creates a NULL data packet with TxPD and sends to the 110 * firmware for transmission, with highest priority setting. 111 */ 112 int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags) 113 { 114 struct mwifiex_adapter *adapter = priv->adapter; 115 struct txpd *local_tx_pd; 116 struct mwifiex_tx_param tx_param; 117 /* sizeof(struct txpd) + Interface specific header */ 118 #define NULL_PACKET_HDR 64 119 u32 data_len = NULL_PACKET_HDR; 120 struct sk_buff *skb; 121 int ret; 122 struct mwifiex_txinfo *tx_info = NULL; 123 124 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags)) 125 return -1; 126 127 if (!priv->media_connected) 128 return -1; 129 130 if (adapter->data_sent) 131 return -1; 132 133 if (adapter->if_ops.is_port_ready && 134 !adapter->if_ops.is_port_ready(priv)) 135 return -1; 136 137 skb = dev_alloc_skb(data_len); 138 if (!skb) 139 return -1; 140 141 tx_info = MWIFIEX_SKB_TXCB(skb); 142 memset(tx_info, 0, sizeof(*tx_info)); 143 tx_info->bss_num = priv->bss_num; 144 tx_info->bss_type = priv->bss_type; 145 tx_info->pkt_len = data_len - 146 (sizeof(struct txpd) + adapter->intf_hdr_len); 147 skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_len); 148 skb_push(skb, sizeof(struct txpd)); 149 150 local_tx_pd = (struct txpd *) skb->data; 151 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 152 local_tx_pd->flags = flags; 153 local_tx_pd->priority = WMM_HIGHEST_PRIORITY; 154 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd)); 155 local_tx_pd->bss_num = priv->bss_num; 156 local_tx_pd->bss_type = priv->bss_type; 157 158 skb_push(skb, adapter->intf_hdr_len); 159 if (adapter->iface_type == MWIFIEX_USB) { 160 ret = adapter->if_ops.host_to_card(adapter, priv->usb_port, 161 skb, NULL); 162 } else { 163 tx_param.next_pkt_len = 0; 164 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, 165 skb, &tx_param); 166 } 167 switch (ret) { 168 case -EBUSY: 169 dev_kfree_skb_any(skb); 170 mwifiex_dbg(adapter, ERROR, 171 "%s: host_to_card failed: ret=%d\n", 172 __func__, ret); 173 adapter->dbg.num_tx_host_to_card_failure++; 174 break; 175 case -1: 176 dev_kfree_skb_any(skb); 177 mwifiex_dbg(adapter, ERROR, 178 "%s: host_to_card failed: ret=%d\n", 179 __func__, ret); 180 adapter->dbg.num_tx_host_to_card_failure++; 181 break; 182 case 0: 183 dev_kfree_skb_any(skb); 184 mwifiex_dbg(adapter, DATA, 185 "data: %s: host_to_card succeeded\n", 186 __func__); 187 adapter->tx_lock_flag = true; 188 break; 189 case -EINPROGRESS: 190 adapter->tx_lock_flag = true; 191 break; 192 default: 193 break; 194 } 195 196 return ret; 197 } 198 199 /* 200 * This function checks if we need to send last packet indication. 201 */ 202 u8 203 mwifiex_check_last_packet_indication(struct mwifiex_private *priv) 204 { 205 struct mwifiex_adapter *adapter = priv->adapter; 206 u8 ret = false; 207 208 if (!adapter->sleep_period.period) 209 return ret; 210 if (mwifiex_wmm_lists_empty(adapter)) 211 ret = true; 212 213 if (ret && !adapter->cmd_sent && !adapter->curr_cmd && 214 !is_command_pending(adapter)) { 215 adapter->delay_null_pkt = false; 216 ret = true; 217 } else { 218 ret = false; 219 adapter->delay_null_pkt = true; 220 } 221 return ret; 222 } 223