new file mode 100644
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+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: station TX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "cfg.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "cmdevt.h"
+#include "wmm.h"
+
+/* This function fills the TxPD for tx packets.
+ *
+ * The Tx buffer received by this function should already have the
+ * header space allocated for TxPD.
+ *
+ * This function inserts the TxPD in between interface header and actual
+ * data and adjusts the buffer pointers accordingly.
+ *
+ * The following TxPD fields are set by this function, as required -
+ * - BSS number
+ * - Tx packet length and offset
+ * - Priority
+ * - Packet delay
+ * - Priority specific Tx control
+ * - Flags
+ */
+void nxpwifi_process_sta_txpd(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ 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;
+}