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+ struct txpd *local_tx_pd; + struct nxpwifi_txinfo *tx_info = NXPWIFI_SKB_TXCB(skb); + unsigned int pad; + u16 pkt_type, pkt_length, pkt_offset; + int hroom = adapter->intf_hdr_len; + u32 tx_control; + + pkt_type = nxpwifi_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0; + + pad = ((uintptr_t)skb->data - (sizeof(*local_tx_pd) + hroom)) & + (NXPWIFI_DMA_ALIGN_SZ - 1); + skb_push(skb, sizeof(*local_tx_pd) + pad); + + 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; + + pkt_length = (u16)(skb->len - (sizeof(struct txpd) + pad)); + if (pkt_type == PKT_TYPE_MGMT) + pkt_length -= NXPWIFI_MGMT_FRAME_HEADER_SIZE; + local_tx_pd->tx_pkt_length = cpu_to_le16(pkt_length); + + local_tx_pd->priority = (u8)skb->priority; + local_tx_pd->pkt_delay_2ms = + nxpwifi_wmm_compute_drv_pkt_delay(priv, skb); + + if (tx_info->flags & NXPWIFI_BUF_FLAG_EAPOL_TX_STATUS || + tx_info->flags & NXPWIFI_BUF_FLAG_ACTION_TX_STATUS) { + local_tx_pd->tx_token_id = tx_info->ack_frame_id; + local_tx_pd->flags |= NXPWIFI_TXPD_FLAGS_REQ_TX_STATUS; + } + + 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 + */ + tx_control = + priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->priority]; + local_tx_pd->tx_control = cpu_to_le32(tx_control); + } + + if (adapter->pps_uapsd_mode) { + if (nxpwifi_check_last_packet_indication(priv)) { + adapter->tx_lock_flag = true; + local_tx_pd->flags = + NXPWIFI_TxPD_POWER_MGMT_LAST_PACKET; + } + } + + /* Offset of actual data */ + pkt_offset = sizeof(struct txpd) + pad; + if (pkt_type == PKT_TYPE_MGMT) { + /* Set the packet type and add header for management frame */ + local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type); + pkt_offset += NXPWIFI_MGMT_FRAME_HEADER_SIZE; + } + + local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset); + + /* make space for adapter->intf_hdr_len */ + skb_push(skb, hroom); + + if (!local_tx_pd->tx_control) + /* TxCtrl set by user or default */ + local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); +} + +/* 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 nxpwifi_send_null_packet(struct nxpwifi_private *priv, u8 flags) +{ + struct nxpwifi_adapter *adapter = priv->adapter; + struct txpd *local_tx_pd; + struct nxpwifi_tx_param tx_param; +/* sizeof(struct txpd) + Interface specific header */ +#define NULL_PACKET_HDR 64 + u32 data_len = NULL_PACKET_HDR; + struct sk_buff *skb; + int ret; + struct nxpwifi_txinfo *tx_info = NULL; + + if (test_bit(NXPWIFI_SURPRISE_REMOVED, &adapter->work_flags)) + return -EPERM; + + if (!priv->media_connected) + return -EPERM; + + if (adapter->data_sent) + return -EBUSY; + + skb = dev_alloc_skb(data_len); + if (!skb) + return -ENOMEM; + + tx_info = NXPWIFI_SKB_TXCB(skb); + memset(tx_info, 0, sizeof(*tx_info)); + tx_info->bss_num = priv->bss_num; + tx_info->bss_type = priv->bss_type; + tx_info->pkt_len = data_len - + (sizeof(struct txpd) + adapter->intf_hdr_len); + skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_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, adapter->intf_hdr_len); + tx_param.next_pkt_len = 0; + ret = adapter->if_ops.host_to_card(adapter, NXPWIFI_TYPE_DATA, + skb, &tx_param); + + switch (ret) { + case -EBUSY: + dev_kfree_skb_any(skb); + nxpwifi_dbg(adapter, ERROR, + "%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); + nxpwifi_dbg(adapter, DATA, + "data: %s: host_to_card succeeded\n", + __func__); + adapter->tx_lock_flag = true; + break; + case -EINPROGRESS: + adapter->tx_lock_flag = true; + break; + default: + dev_kfree_skb_any(skb); + nxpwifi_dbg(adapter, ERROR, + "%s: host_to_card failed: ret=%d\n", + __func__, ret); + adapter->dbg.num_tx_host_to_card_failure++; + break; + } + + return ret; +} + +/* This function checks if we need to send last packet indication. + */ +u8 +nxpwifi_check_last_packet_indication(struct nxpwifi_private *priv) +{ + struct nxpwifi_adapter *adapter = priv->adapter; + u8 ret = false; + + if (!adapter->sleep_period.period) + return ret; + if (nxpwifi_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; +}