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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * NXP Wireless LAN device driver: station TX data handling4 *5 * Copyright 2011-2020 NXP6 */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 the19 * header space allocated for TxPD.20 *21 * This function inserts the TxPD in between interface header and actual22 * data and adjusts the buffer pointers accordingly.23 *24 * The following TxPD fields are set by this function, as required -25 * - BSS number26 * - Tx packet length and offset27 * - Priority28 * - Packet delay29 * - Priority specific Tx control30 * - Flags31 */32void 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 will71 * cause the default value to be used later in this function72 */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 the110 * firmware for transmission, with highest priority setting.111 */112int 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 64119 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 */202u8203mwifiex_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