[PATCH v2 32/43] wifi: nxpwifi: add sta_tx.c

[David Lin <yu-hao.lin@nxp.com>]

---
 drivers/net/wireless/nxp/nxpwifi/sta_tx.c | 209 ++++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/sta_tx.c

diff --git a/drivers/net/wireless/nxp/nxpwifi/sta_tx.c b/drivers/net/wireless/nxp/nxpwifi/sta_tx.c
new file mode 100644
index 000000000000..f1b686ecc843
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/sta_tx.c
@@ -0,0 +1,209 @@
+// 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;
+}
-- 
2.34.1