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Message-Id: <20240930063701.2566520-14-yu-hao.lin@nxp.com>
Date: Mon, 30 Sep 2024 14:36:52 +0800
From: David Lin <yu-hao.lin@....com>
To: linux-wireless@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
briannorris@...omium.org,
kvalo@...nel.org,
francesco@...cini.it,
tsung-hsien.hsieh@....com,
s.hauer@...gutronix.de,
David Lin <yu-hao.lin@....com>
Subject: [PATCH v3 13/22] wifi: nxpwifi: add data path files
Implement Tx and Rx paths for client and AP modes.
Signed-off-by: David Lin <yu-hao.lin@....com>
---
drivers/net/wireless/nxp/nxpwifi/sta_rx.c | 243 ++++++++++
drivers/net/wireless/nxp/nxpwifi/sta_tx.c | 208 ++++++++
drivers/net/wireless/nxp/nxpwifi/txrx.c | 357 ++++++++++++++
drivers/net/wireless/nxp/nxpwifi/uap_txrx.c | 498 ++++++++++++++++++++
4 files changed, 1306 insertions(+)
create mode 100644 drivers/net/wireless/nxp/nxpwifi/sta_rx.c
create mode 100644 drivers/net/wireless/nxp/nxpwifi/sta_tx.c
create mode 100644 drivers/net/wireless/nxp/nxpwifi/txrx.c
create mode 100644 drivers/net/wireless/nxp/nxpwifi/uap_txrx.c
diff --git a/drivers/net/wireless/nxp/nxpwifi/sta_rx.c b/drivers/net/wireless/nxp/nxpwifi/sta_rx.c
new file mode 100644
index 000000000000..95883ec0bbd9
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/sta_rx.c
@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: station RX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include <uapi/linux/ipv6.h>
+#include <net/ndisc.h>
+#include "cfg.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "11n_aggr.h"
+#include "11n_rxreorder.h"
+
+/* This function checks if a frame is IPv4 ARP or IPv6 Neighbour advertisement
+ * frame. If frame has both source and destination mac address as same, this
+ * function drops such gratuitous frames.
+ */
+static bool
+nxpwifi_discard_gratuitous_arp(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ const struct nxpwifi_arp_eth_header *arp;
+ struct ethhdr *eth;
+ struct ipv6hdr *ipv6;
+ struct icmp6hdr *icmpv6;
+
+ eth = (struct ethhdr *)skb->data;
+ switch (ntohs(eth->h_proto)) {
+ case ETH_P_ARP:
+ arp = (void *)(skb->data + sizeof(struct ethhdr));
+ if (arp->hdr.ar_op == htons(ARPOP_REPLY) ||
+ arp->hdr.ar_op == htons(ARPOP_REQUEST)) {
+ if (!memcmp(arp->ar_sip, arp->ar_tip, 4))
+ return true;
+ }
+ break;
+ case ETH_P_IPV6:
+ ipv6 = (void *)(skb->data + sizeof(struct ethhdr));
+ icmpv6 = (void *)(skb->data + sizeof(struct ethhdr) +
+ sizeof(struct ipv6hdr));
+ if (icmpv6->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
+ if (!memcmp(&ipv6->saddr, &ipv6->daddr,
+ sizeof(struct in6_addr)))
+ return true;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return false;
+}
+
+/* This function processes the received packet and forwards it
+ * to kernel/upper layer.
+ *
+ * This function parses through the received packet and determines
+ * if it is a debug packet or normal packet.
+ *
+ * For non-debug packets, the function chops off unnecessary leading
+ * header bytes, reconstructs the packet as an ethernet frame or
+ * 802.2/llc/snap frame as required, and sends it to kernel/upper layer.
+ *
+ * The completion callback is called after processing in complete.
+ */
+int nxpwifi_process_rx_packet(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ int ret;
+ struct rx_packet_hdr *rx_pkt_hdr;
+ struct rxpd *local_rx_pd;
+ int hdr_chop;
+ struct ethhdr *eth;
+ u16 rx_pkt_off;
+ u8 adj_rx_rate = 0;
+
+ local_rx_pd = (struct rxpd *)(skb->data);
+
+ rx_pkt_off = le16_to_cpu(local_rx_pd->rx_pkt_offset);
+ rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;
+
+ if (sizeof(rx_pkt_hdr->eth803_hdr) + sizeof(rfc1042_header) +
+ rx_pkt_off > skb->len) {
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ if (sizeof(*rx_pkt_hdr) + rx_pkt_off <= skb->len &&
+ ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
+ sizeof(bridge_tunnel_header))) ||
+ (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
+ sizeof(rfc1042_header)) &&
+ rx_pkt_hdr->rfc1042_hdr.snap_type != htons(ETH_P_AARP) &&
+ rx_pkt_hdr->rfc1042_hdr.snap_type != htons(ETH_P_IPX)))) {
+ /* Replace the 803 header and rfc1042 header (llc/snap) with an
+ * EthernetII header, keep the src/dst and snap_type
+ * (ethertype).
+ * The firmware only passes up SNAP frames converting
+ * all RX Data from 802.11 to 802.2/LLC/SNAP frames.
+ * To create the Ethernet II, just move the src, dst address
+ * right before the snap_type.
+ */
+ eth = (struct ethhdr *)
+ ((u8 *)&rx_pkt_hdr->eth803_hdr
+ + sizeof(rx_pkt_hdr->eth803_hdr) +
+ sizeof(rx_pkt_hdr->rfc1042_hdr)
+ - sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
+ - sizeof(rx_pkt_hdr->eth803_hdr.h_source)
+ - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
+
+ memcpy(eth->h_source, rx_pkt_hdr->eth803_hdr.h_source,
+ sizeof(eth->h_source));
+ memcpy(eth->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
+ sizeof(eth->h_dest));
+
+ /* Chop off the rxpd + the excess memory from the 802.2/llc/snap
+ * header that was removed.
+ */
+ hdr_chop = (u8 *)eth - (u8 *)local_rx_pd;
+ } else {
+ /* Chop off the rxpd */
+ hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)local_rx_pd;
+ }
+
+ /* Chop off the leading header bytes so the it points to the start of
+ * either the reconstructed EthII frame or the 802.2/llc/snap frame
+ */
+ skb_pull(skb, hdr_chop);
+
+ if (priv->hs2_enabled &&
+ nxpwifi_discard_gratuitous_arp(priv, skb)) {
+ nxpwifi_dbg(priv->adapter, INFO, "Bypassed Gratuitous ARP\n");
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ /* Only stash RX bitrate for unicast packets. */
+ if (likely(!is_multicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest))) {
+ priv->rxpd_rate = local_rx_pd->rx_rate;
+ priv->rxpd_htinfo = local_rx_pd->ht_info;
+ }
+
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA ||
+ GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP) {
+ adj_rx_rate = nxpwifi_adjust_data_rate(priv,
+ local_rx_pd->rx_rate,
+ local_rx_pd->ht_info);
+ nxpwifi_hist_data_add(priv, adj_rx_rate, local_rx_pd->snr,
+ local_rx_pd->nf);
+ }
+
+ ret = nxpwifi_recv_packet(priv, skb);
+ if (ret)
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "recv packet failed\n");
+
+ return ret;
+}
+
+/* This function processes the received buffer.
+ *
+ * The function looks into the RxPD and performs sanity tests on the
+ * received buffer to ensure its a valid packet, before processing it
+ * further. If the packet is determined to be aggregated, it is
+ * de-aggregated accordingly. Non-unicast packets are sent directly to
+ * the kernel/upper layers. Unicast packets are handed over to the
+ * Rx reordering routine if 11n is enabled.
+ *
+ * The completion callback is called after processing in complete.
+ */
+int nxpwifi_process_sta_rx_packet(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int ret = 0;
+ struct rxpd *local_rx_pd;
+ struct rx_packet_hdr *rx_pkt_hdr;
+ u8 ta[ETH_ALEN];
+ u16 rx_pkt_type, rx_pkt_offset, rx_pkt_length, seq_num;
+
+ local_rx_pd = (struct rxpd *)(skb->data);
+ rx_pkt_type = le16_to_cpu(local_rx_pd->rx_pkt_type);
+ rx_pkt_offset = le16_to_cpu(local_rx_pd->rx_pkt_offset);
+ rx_pkt_length = le16_to_cpu(local_rx_pd->rx_pkt_length);
+ seq_num = le16_to_cpu(local_rx_pd->seq_num);
+
+ rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset;
+
+ if ((rx_pkt_offset + rx_pkt_length) > skb->len ||
+ sizeof(rx_pkt_hdr->eth803_hdr) + rx_pkt_offset > skb->len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n",
+ skb->len, rx_pkt_offset, rx_pkt_length);
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+
+ if (rx_pkt_type == PKT_TYPE_MGMT) {
+ ret = nxpwifi_process_mgmt_packet(priv, skb);
+ if (ret && (ret != -EINPROGRESS))
+ nxpwifi_dbg(adapter, DATA, "Rx of mgmt packet failed");
+ if (ret != -EINPROGRESS)
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+
+ /* If the packet is not an unicast packet then send the packet
+ * directly to os. Don't pass thru rx reordering
+ */
+ if (!IS_11N_ENABLED(priv) ||
+ !ether_addr_equal_unaligned(priv->curr_addr,
+ rx_pkt_hdr->eth803_hdr.h_dest)) {
+ nxpwifi_process_rx_packet(priv, skb);
+ return ret;
+ }
+
+ if (nxpwifi_queuing_ra_based(priv)) {
+ memcpy(ta, rx_pkt_hdr->eth803_hdr.h_source, ETH_ALEN);
+ } else {
+ if (rx_pkt_type != PKT_TYPE_BAR &&
+ local_rx_pd->priority < MAX_NUM_TID)
+ priv->rx_seq[local_rx_pd->priority] = seq_num;
+ memcpy(ta, priv->curr_bss_params.bss_descriptor.mac_address,
+ ETH_ALEN);
+ }
+
+ /* Reorder and send to OS */
+ ret = nxpwifi_11n_rx_reorder_pkt(priv, seq_num, local_rx_pd->priority,
+ ta, (u8)rx_pkt_type, skb);
+
+ if (ret || rx_pkt_type == PKT_TYPE_BAR)
+ dev_kfree_skb_any(skb);
+
+ if (ret)
+ priv->stats.rx_dropped++;
+
+ return ret;
+}
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..6611db254931
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/sta_tx.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: station TX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#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;
+}
diff --git a/drivers/net/wireless/nxp/nxpwifi/txrx.c b/drivers/net/wireless/nxp/nxpwifi/txrx.c
new file mode 100644
index 000000000000..6bd8e263857e
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/txrx.c
@@ -0,0 +1,357 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: generic TX/RX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "cfg.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+
+/* This function processes the received buffer.
+ *
+ * Main responsibility of this function is to parse the RxPD to
+ * identify the correct interface this packet is headed for and
+ * forwarding it to the associated handling function, where the
+ * packet will be further processed and sent to kernel/upper layer
+ * if required.
+ */
+int nxpwifi_handle_rx_packet(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_private *priv =
+ nxpwifi_get_priv(adapter, NXPWIFI_BSS_ROLE_ANY);
+ struct rxpd *local_rx_pd;
+ struct nxpwifi_rxinfo *rx_info = NXPWIFI_SKB_RXCB(skb);
+ int ret;
+
+ local_rx_pd = (struct rxpd *)(skb->data);
+ /* Get the BSS number from rxpd, get corresponding priv */
+ priv = nxpwifi_get_priv_by_id(adapter, local_rx_pd->bss_num &
+ BSS_NUM_MASK, local_rx_pd->bss_type);
+ if (!priv)
+ priv = nxpwifi_get_priv(adapter, NXPWIFI_BSS_ROLE_ANY);
+
+ if (!priv) {
+ nxpwifi_dbg(adapter, ERROR,
+ "data: priv not found. Drop RX packet\n");
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ nxpwifi_dbg_dump(adapter, DAT_D, "rx pkt:", skb->data,
+ min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
+
+ memset(rx_info, 0, sizeof(*rx_info));
+ rx_info->bss_num = priv->bss_num;
+ rx_info->bss_type = priv->bss_type;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP)
+ ret = nxpwifi_process_uap_rx_packet(priv, skb);
+ else
+ ret = nxpwifi_process_sta_rx_packet(priv, skb);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nxpwifi_handle_rx_packet);
+
+/* This function sends a packet to device.
+ *
+ * It processes the packet to add the TxPD, checks condition and
+ * sends the processed packet to firmware for transmission.
+ *
+ * On successful completion, the function calls the completion callback
+ * and logs the time.
+ */
+int nxpwifi_process_tx(struct nxpwifi_private *priv, struct sk_buff *skb,
+ struct nxpwifi_tx_param *tx_param)
+{
+ int hroom, ret;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct txpd *local_tx_pd = NULL;
+ struct nxpwifi_sta_node *dest_node;
+ struct ethhdr *hdr = (void *)skb->data;
+
+ if (unlikely(!skb->len ||
+ skb_headroom(skb) < NXPWIFI_MIN_DATA_HEADER_LEN)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ hroom = adapter->intf_hdr_len;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP) {
+ dest_node = nxpwifi_get_sta_entry(priv, hdr->h_dest);
+ if (dest_node) {
+ dest_node->stats.tx_bytes += skb->len;
+ dest_node->stats.tx_packets++;
+ }
+
+ nxpwifi_process_uap_txpd(priv, skb);
+ } else {
+ nxpwifi_process_sta_txpd(priv, skb);
+ }
+
+ if ((adapter->data_sent || adapter->tx_lock_flag)) {
+ skb_queue_tail(&adapter->tx_data_q, skb);
+ atomic_inc(&adapter->tx_queued);
+ return 0;
+ }
+
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA)
+ local_tx_pd = (struct txpd *)(skb->data + hroom);
+ ret = adapter->if_ops.host_to_card(adapter,
+ NXPWIFI_TYPE_DATA,
+ skb, tx_param);
+ nxpwifi_dbg_dump(adapter, DAT_D, "tx pkt:", skb->data,
+ min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
+
+out:
+ switch (ret) {
+ case -ENOSR:
+ nxpwifi_dbg(adapter, DATA, "data: -ENOSR is returned\n");
+ break;
+ case -EBUSY:
+ if ((GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) &&
+ adapter->pps_uapsd_mode && adapter->tx_lock_flag) {
+ priv->adapter->tx_lock_flag = false;
+ if (local_tx_pd)
+ local_tx_pd->flags = 0;
+ }
+ nxpwifi_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
+ break;
+ case -EINPROGRESS:
+ break;
+ case -EINVAL:
+ nxpwifi_dbg(adapter, ERROR,
+ "malformed skb (length: %u, headroom: %u)\n",
+ skb->len, skb_headroom(skb));
+ fallthrough;
+ case 0:
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR,
+ "nxpwifi_write_data_async failed: 0x%X\n",
+ ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ }
+
+ return ret;
+}
+
+static int nxpwifi_host_to_card(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb,
+ struct nxpwifi_tx_param *tx_param)
+{
+ struct txpd *local_tx_pd = NULL;
+ u8 *head_ptr = skb->data;
+ int ret = 0;
+ struct nxpwifi_private *priv;
+ struct nxpwifi_txinfo *tx_info;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ priv = nxpwifi_get_priv_by_id(adapter, tx_info->bss_num,
+ tx_info->bss_type);
+ if (!priv) {
+ nxpwifi_dbg(adapter, ERROR,
+ "data: priv not found. Drop TX packet\n");
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, 0);
+ return ret;
+ }
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA)
+ local_tx_pd = (struct txpd *)(head_ptr + adapter->intf_hdr_len);
+
+ ret = adapter->if_ops.host_to_card(adapter,
+ NXPWIFI_TYPE_DATA,
+ skb, tx_param);
+
+ switch (ret) {
+ case -ENOSR:
+ nxpwifi_dbg(adapter, ERROR, "data: -ENOSR is returned\n");
+ break;
+ case -EBUSY:
+ if ((GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) &&
+ adapter->pps_uapsd_mode &&
+ adapter->tx_lock_flag) {
+ priv->adapter->tx_lock_flag = false;
+ if (local_tx_pd)
+ local_tx_pd->flags = 0;
+ }
+ skb_queue_head(&adapter->tx_data_q, skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ atomic_add(tx_info->aggr_num, &adapter->tx_queued);
+ else
+ atomic_inc(&adapter->tx_queued);
+ nxpwifi_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
+ break;
+ case -EINPROGRESS:
+ break;
+ case 0:
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR,
+ "nxpwifi_write_data_async failed: 0x%X\n", ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ }
+ return ret;
+}
+
+static int
+nxpwifi_dequeue_tx_queue(struct nxpwifi_adapter *adapter)
+{
+ struct sk_buff *skb, *skb_next;
+ struct nxpwifi_txinfo *tx_info;
+ struct nxpwifi_tx_param tx_param;
+
+ skb = skb_dequeue(&adapter->tx_data_q);
+ if (!skb)
+ return -ENOMEM;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ atomic_sub(tx_info->aggr_num, &adapter->tx_queued);
+ else
+ atomic_dec(&adapter->tx_queued);
+
+ if (!skb_queue_empty(&adapter->tx_data_q))
+ skb_next = skb_peek(&adapter->tx_data_q);
+ else
+ skb_next = NULL;
+ tx_param.next_pkt_len = ((skb_next) ? skb_next->len : 0);
+ if (!tx_param.next_pkt_len) {
+ if (!nxpwifi_wmm_lists_empty(adapter))
+ tx_param.next_pkt_len = 1;
+ }
+ return nxpwifi_host_to_card(adapter, skb, &tx_param);
+}
+
+void
+nxpwifi_process_tx_queue(struct nxpwifi_adapter *adapter)
+{
+ do {
+ if (adapter->data_sent || adapter->tx_lock_flag)
+ break;
+ if (nxpwifi_dequeue_tx_queue(adapter))
+ break;
+ } while (!skb_queue_empty(&adapter->tx_data_q));
+}
+
+/* Packet send completion callback handler.
+ *
+ * It either frees the buffer directly or forwards it to another
+ * completion callback which checks conditions, updates statistics,
+ * wakes up stalled traffic queue if required, and then frees the buffer.
+ */
+int nxpwifi_write_data_complete(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb, int aggr, int status)
+{
+ struct nxpwifi_private *priv;
+ struct nxpwifi_txinfo *tx_info;
+ struct netdev_queue *txq;
+ int index;
+
+ if (!skb)
+ return 0;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ priv = nxpwifi_get_priv_by_id(adapter, tx_info->bss_num,
+ tx_info->bss_type);
+ if (!priv)
+ goto done;
+
+ nxpwifi_set_trans_start(priv->netdev);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_BRIDGED_PKT)
+ atomic_dec_return(&adapter->pending_bridged_pkts);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ goto done;
+
+ if (!status) {
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += tx_info->pkt_len;
+ if (priv->tx_timeout_cnt)
+ priv->tx_timeout_cnt = 0;
+ } else {
+ priv->stats.tx_errors++;
+ }
+
+ if (aggr)
+ /* For skb_aggr, do not wake up tx queue */
+ goto done;
+
+ atomic_dec(&adapter->tx_pending);
+
+ index = nxpwifi_1d_to_wmm_queue[skb->priority];
+ if (atomic_dec_return(&priv->wmm_tx_pending[index]) < LOW_TX_PENDING) {
+ txq = netdev_get_tx_queue(priv->netdev, index);
+ if (netif_tx_queue_stopped(txq)) {
+ netif_tx_wake_queue(txq);
+ nxpwifi_dbg(adapter, DATA, "wake queue: %d\n", index);
+ }
+ }
+done:
+ dev_kfree_skb_any(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nxpwifi_write_data_complete);
+
+void nxpwifi_parse_tx_status_event(struct nxpwifi_private *priv,
+ void *event_body)
+{
+ struct tx_status_event *tx_status = (void *)priv->adapter->event_body;
+ struct sk_buff *ack_skb;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (!tx_status->tx_token_id)
+ return;
+
+ spin_lock_bh(&priv->ack_status_lock);
+ ack_skb = idr_remove(&priv->ack_status_frames, tx_status->tx_token_id);
+ spin_unlock_bh(&priv->ack_status_lock);
+
+ if (ack_skb) {
+ tx_info = NXPWIFI_SKB_TXCB(ack_skb);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_EAPOL_TX_STATUS) {
+ /* consumes ack_skb */
+ skb_complete_wifi_ack(ack_skb, !tx_status->status);
+ } else {
+ /* Remove broadcast address which was added by driver */
+ memmove(ack_skb->data +
+ sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16),
+ ack_skb->data +
+ sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
+ ETH_ALEN, ack_skb->len -
+ (sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
+ ETH_ALEN));
+ ack_skb->len = ack_skb->len - ETH_ALEN;
+ /* Remove driver's proprietary header including 2 bytes
+ * of packet length and pass actual management frame buffer
+ * to cfg80211.
+ */
+ cfg80211_mgmt_tx_status(&priv->wdev, tx_info->cookie,
+ ack_skb->data +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE +
+ sizeof(u16), ack_skb->len -
+ (NXPWIFI_MGMT_FRAME_HEADER_SIZE
+ + sizeof(u16)),
+ !tx_status->status, GFP_ATOMIC);
+ dev_kfree_skb_any(ack_skb);
+ }
+ }
+}
diff --git a/drivers/net/wireless/nxp/nxpwifi/uap_txrx.c b/drivers/net/wireless/nxp/nxpwifi/uap_txrx.c
new file mode 100644
index 000000000000..b86d5fbfb531
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/uap_txrx.c
@@ -0,0 +1,498 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: AP TX and RX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "cfg.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n_aggr.h"
+#include "11n_rxreorder.h"
+
+/* This function checks if particular RA list has packets more than low bridge
+ * packet threshold and then deletes packet from this RA list.
+ * Function deletes packets from such RA list and returns true. If no such list
+ * is found, false is returned.
+ */
+static bool
+nxpwifi_uap_del_tx_pkts_in_ralist(struct nxpwifi_private *priv,
+ struct list_head *ra_list_head,
+ int tid)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+ struct sk_buff *skb, *tmp;
+ bool pkt_deleted = false;
+ struct nxpwifi_txinfo *tx_info;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+
+ list_for_each_entry(ra_list, ra_list_head, list) {
+ if (skb_queue_empty(&ra_list->skb_head))
+ continue;
+
+ skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_BRIDGED_PKT) {
+ __skb_unlink(skb, &ra_list->skb_head);
+ nxpwifi_write_data_complete(adapter, skb, 0,
+ -1);
+ if (ra_list->tx_paused)
+ priv->wmm.pkts_paused[tid]--;
+ else
+ atomic_dec(&priv->wmm.tx_pkts_queued);
+ pkt_deleted = true;
+ }
+ if ((atomic_read(&adapter->pending_bridged_pkts) <=
+ NXPWIFI_BRIDGED_PKTS_THR_LOW))
+ break;
+ }
+ }
+
+ return pkt_deleted;
+}
+
+/* This function deletes packets from particular RA List. RA list index
+ * from which packets are deleted is preserved so that packets from next RA
+ * list are deleted upon subsequent call thus maintaining fairness.
+ */
+static void nxpwifi_uap_cleanup_tx_queues(struct nxpwifi_private *priv)
+{
+ struct list_head *ra_list;
+ int i;
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ for (i = 0; i < MAX_NUM_TID; i++, priv->del_list_idx++) {
+ if (priv->del_list_idx == MAX_NUM_TID)
+ priv->del_list_idx = 0;
+ ra_list = &priv->wmm.tid_tbl_ptr[priv->del_list_idx].ra_list;
+ if (nxpwifi_uap_del_tx_pkts_in_ralist(priv, ra_list, i)) {
+ priv->del_list_idx++;
+ break;
+ }
+ }
+
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+static void
+nxpwifi_uap_queue_bridged_pkt(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct uap_rxpd *uap_rx_pd;
+ struct rx_packet_hdr *rx_pkt_hdr;
+ struct sk_buff *new_skb;
+ struct nxpwifi_txinfo *tx_info;
+ int hdr_chop;
+ struct ethhdr *p_ethhdr;
+ struct nxpwifi_sta_node *src_node;
+ int index;
+
+ uap_rx_pd = (struct uap_rxpd *)(skb->data);
+ rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+ if ((atomic_read(&adapter->pending_bridged_pkts) >=
+ NXPWIFI_BRIDGED_PKTS_THR_HIGH)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "Tx: Bridge packet limit reached. Drop packet!\n");
+ kfree_skb(skb);
+ nxpwifi_uap_cleanup_tx_queues(priv);
+ return;
+ }
+
+ if (sizeof(*rx_pkt_hdr) +
+ le16_to_cpu(uap_rx_pd->rx_pkt_offset) > skb->len) {
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
+ sizeof(bridge_tunnel_header))) ||
+ (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
+ sizeof(rfc1042_header)) &&
+ rx_pkt_hdr->rfc1042_hdr.snap_type != htons(ETH_P_AARP) &&
+ rx_pkt_hdr->rfc1042_hdr.snap_type != htons(ETH_P_IPX))) {
+ /* Replace the 803 header and rfc1042 header (llc/snap) with
+ * an Ethernet II header, keep the src/dst and snap_type
+ * (ethertype).
+ *
+ * The firmware only passes up SNAP frames converting all RX
+ * data from 802.11 to 802.2/LLC/SNAP frames.
+ *
+ * To create the Ethernet II, just move the src, dst address
+ * right before the snap_type.
+ */
+ p_ethhdr = (struct ethhdr *)
+ ((u8 *)(&rx_pkt_hdr->eth803_hdr)
+ + sizeof(rx_pkt_hdr->eth803_hdr)
+ + sizeof(rx_pkt_hdr->rfc1042_hdr)
+ - sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
+ - sizeof(rx_pkt_hdr->eth803_hdr.h_source)
+ - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
+ memcpy(p_ethhdr->h_source, rx_pkt_hdr->eth803_hdr.h_source,
+ sizeof(p_ethhdr->h_source));
+ memcpy(p_ethhdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
+ sizeof(p_ethhdr->h_dest));
+ /* Chop off the rxpd + the excess memory from
+ * 802.2/llc/snap header that was removed.
+ */
+ hdr_chop = (u8 *)p_ethhdr - (u8 *)uap_rx_pd;
+ } else {
+ /* Chop off the rxpd */
+ hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)uap_rx_pd;
+ }
+
+ /* Chop off the leading header bytes so that it points
+ * to the start of either the reconstructed EthII frame
+ * or the 802.2/llc/snap frame.
+ */
+ skb_pull(skb, hdr_chop);
+
+ if (skb_headroom(skb) < NXPWIFI_MIN_DATA_HEADER_LEN) {
+ nxpwifi_dbg(adapter, ERROR,
+ "data: Tx: insufficient skb headroom %d\n",
+ skb_headroom(skb));
+ /* Insufficient skb headroom - allocate a new skb */
+ new_skb =
+ skb_realloc_headroom(skb, NXPWIFI_MIN_DATA_HEADER_LEN);
+ if (unlikely(!new_skb)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "Tx: cannot allocate new_skb\n");
+ kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ return;
+ }
+
+ kfree_skb(skb);
+ skb = new_skb;
+ nxpwifi_dbg(adapter, INFO,
+ "info: new skb headroom %d\n",
+ skb_headroom(skb));
+ }
+
+ 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->flags |= NXPWIFI_BUF_FLAG_BRIDGED_PKT;
+
+ src_node = nxpwifi_get_sta_entry(priv, rx_pkt_hdr->eth803_hdr.h_source);
+ if (src_node) {
+ src_node->stats.last_rx = jiffies;
+ src_node->stats.rx_bytes += skb->len;
+ src_node->stats.rx_packets++;
+ src_node->stats.last_tx_rate = uap_rx_pd->rx_rate;
+ src_node->stats.last_tx_htinfo = uap_rx_pd->ht_info;
+ }
+
+ if (is_unicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest)) {
+ /* Update bridge packet statistics as the
+ * packet is not going to kernel/upper layer.
+ */
+ priv->stats.rx_bytes += skb->len;
+ priv->stats.rx_packets++;
+
+ /* Sending bridge packet to TX queue, so save the packet
+ * length in TXCB to update statistics in TX complete.
+ */
+ tx_info->pkt_len = skb->len;
+ }
+
+ __net_timestamp(skb);
+
+ index = nxpwifi_1d_to_wmm_queue[skb->priority];
+ atomic_inc(&priv->wmm_tx_pending[index]);
+ nxpwifi_wmm_add_buf_txqueue(priv, skb);
+ atomic_inc(&adapter->tx_pending);
+ atomic_inc(&adapter->pending_bridged_pkts);
+
+ nxpwifi_queue_work(adapter, &adapter->main_work);
+}
+
+/* This function contains logic for AP packet forwarding.
+ *
+ * If a packet is multicast/broadcast, it is sent to kernel/upper layer
+ * as well as queued back to AP TX queue so that it can be sent to other
+ * associated stations.
+ * If a packet is unicast and RA is present in associated station list,
+ * it is again requeued into AP TX queue.
+ * If a packet is unicast and RA is not in associated station list,
+ * packet is forwarded to kernel to handle routing logic.
+ */
+int nxpwifi_handle_uap_rx_forward(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct uap_rxpd *uap_rx_pd;
+ struct rx_packet_hdr *rx_pkt_hdr;
+ u8 ra[ETH_ALEN];
+ struct sk_buff *skb_uap;
+
+ uap_rx_pd = (struct uap_rxpd *)(skb->data);
+ rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+ /* don't do packet forwarding in disconnected state */
+ if (!priv->media_connected) {
+ nxpwifi_dbg(adapter, ERROR,
+ "drop packet in disconnected state.\n");
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ memcpy(ra, rx_pkt_hdr->eth803_hdr.h_dest, ETH_ALEN);
+
+ if (is_multicast_ether_addr(ra)) {
+ skb_uap = skb_copy(skb, GFP_ATOMIC);
+ if (likely(skb_uap)) {
+ nxpwifi_uap_queue_bridged_pkt(priv, skb_uap);
+ } else {
+ nxpwifi_dbg(adapter, ERROR,
+ "failed to copy skb for uAP\n");
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return -ENOMEM;
+ }
+ } else {
+ if (nxpwifi_get_sta_entry(priv, ra)) {
+ /* Requeue Intra-BSS packet */
+ nxpwifi_uap_queue_bridged_pkt(priv, skb);
+ return 0;
+ }
+ }
+
+ /* Forward unicat/Inter-BSS packets to kernel. */
+ return nxpwifi_process_rx_packet(priv, skb);
+}
+
+int nxpwifi_uap_recv_packet(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_sta_node *src_node;
+ struct ethhdr *p_ethhdr;
+ struct sk_buff *skb_uap;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (!skb)
+ return -ENOMEM;
+
+ p_ethhdr = (void *)skb->data;
+ src_node = nxpwifi_get_sta_entry(priv, p_ethhdr->h_source);
+ if (src_node) {
+ src_node->stats.last_rx = jiffies;
+ src_node->stats.rx_bytes += skb->len;
+ src_node->stats.rx_packets++;
+ }
+
+ if (is_multicast_ether_addr(p_ethhdr->h_dest) ||
+ nxpwifi_get_sta_entry(priv, p_ethhdr->h_dest)) {
+ if (skb_headroom(skb) < NXPWIFI_MIN_DATA_HEADER_LEN)
+ skb_uap =
+ skb_realloc_headroom(skb, NXPWIFI_MIN_DATA_HEADER_LEN);
+ else
+ skb_uap = skb_copy(skb, GFP_ATOMIC);
+
+ if (likely(skb_uap)) {
+ tx_info = NXPWIFI_SKB_TXCB(skb_uap);
+ memset(tx_info, 0, sizeof(*tx_info));
+ tx_info->bss_num = priv->bss_num;
+ tx_info->bss_type = priv->bss_type;
+ tx_info->flags |= NXPWIFI_BUF_FLAG_BRIDGED_PKT;
+ __net_timestamp(skb_uap);
+ nxpwifi_wmm_add_buf_txqueue(priv, skb_uap);
+ atomic_inc(&adapter->tx_pending);
+ atomic_inc(&adapter->pending_bridged_pkts);
+ if ((atomic_read(&adapter->pending_bridged_pkts) >=
+ NXPWIFI_BRIDGED_PKTS_THR_HIGH)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "Tx: Bridge packet limit reached. Drop packet!\n");
+ nxpwifi_uap_cleanup_tx_queues(priv);
+ }
+
+ } else {
+ nxpwifi_dbg(adapter, ERROR, "failed to allocate skb_uap");
+ }
+
+ nxpwifi_queue_work(adapter, &adapter->main_work);
+ /* Don't forward Intra-BSS unicast packet to upper layer*/
+ if (nxpwifi_get_sta_entry(priv, p_ethhdr->h_dest))
+ return 0;
+ }
+
+ skb->dev = priv->netdev;
+ skb->protocol = eth_type_trans(skb, priv->netdev);
+ skb->ip_summed = CHECKSUM_NONE;
+
+ /* Forward multicast/broadcast packet to upper layer*/
+ netif_rx(skb);
+ return 0;
+}
+
+/* This function processes the packet received on AP interface.
+ *
+ * The function looks into the RxPD and performs sanity tests on the
+ * received buffer to ensure its a valid packet before processing it
+ * further. If the packet is determined to be aggregated, it is
+ * de-aggregated accordingly. Then skb is passed to AP packet forwarding logic.
+ *
+ * The completion callback is called after processing is complete.
+ */
+int nxpwifi_process_uap_rx_packet(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int ret;
+ struct uap_rxpd *uap_rx_pd;
+ struct rx_packet_hdr *rx_pkt_hdr;
+ u16 rx_pkt_type;
+ u8 ta[ETH_ALEN], pkt_type;
+ struct nxpwifi_sta_node *node;
+
+ uap_rx_pd = (struct uap_rxpd *)(skb->data);
+ rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type);
+ rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+ if (le16_to_cpu(uap_rx_pd->rx_pkt_offset) +
+ sizeof(rx_pkt_hdr->eth803_hdr) > skb->len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "wrong rx packet for struct ethhdr: len=%d, offset=%d\n",
+ skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset));
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source);
+
+ if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) +
+ le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16)skb->len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "wrong rx packet: len=%d, offset=%d, length=%d\n",
+ skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset),
+ le16_to_cpu(uap_rx_pd->rx_pkt_length));
+ priv->stats.rx_dropped++;
+
+ node = nxpwifi_get_sta_entry(priv, ta);
+ if (node)
+ node->stats.tx_failed++;
+
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ if (rx_pkt_type == PKT_TYPE_MGMT) {
+ ret = nxpwifi_process_mgmt_packet(priv, skb);
+ if (ret && (ret != -EINPROGRESS))
+ nxpwifi_dbg(adapter, DATA, "Rx of mgmt packet failed");
+ if (ret != -EINPROGRESS)
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+
+ if (rx_pkt_type != PKT_TYPE_BAR && uap_rx_pd->priority < MAX_NUM_TID) {
+ spin_lock_bh(&priv->sta_list_spinlock);
+ node = nxpwifi_get_sta_entry(priv, ta);
+ if (node)
+ node->rx_seq[uap_rx_pd->priority] =
+ le16_to_cpu(uap_rx_pd->seq_num);
+ spin_unlock_bh(&priv->sta_list_spinlock);
+ }
+
+ if (!priv->ap_11n_enabled ||
+ (!nxpwifi_11n_get_rx_reorder_tbl(priv, uap_rx_pd->priority, ta) &&
+ (le16_to_cpu(uap_rx_pd->rx_pkt_type) != PKT_TYPE_AMSDU))) {
+ ret = nxpwifi_handle_uap_rx_forward(priv, skb);
+ return ret;
+ }
+
+ /* Reorder and send to kernel */
+ pkt_type = (u8)le16_to_cpu(uap_rx_pd->rx_pkt_type);
+ ret = nxpwifi_11n_rx_reorder_pkt(priv, le16_to_cpu(uap_rx_pd->seq_num),
+ uap_rx_pd->priority, ta, pkt_type,
+ skb);
+
+ if (ret || rx_pkt_type == PKT_TYPE_BAR)
+ dev_kfree_skb_any(skb);
+
+ if (ret)
+ priv->stats.rx_dropped++;
+
+ return ret;
+}
+
+/* This function fills the TxPD for AP 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_uap_txpd(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct uap_txpd *txpd;
+ struct nxpwifi_txinfo *tx_info = NXPWIFI_SKB_TXCB(skb);
+ int pad;
+ u16 pkt_type, pkt_offset;
+ int hroom = adapter->intf_hdr_len;
+
+ pkt_type = nxpwifi_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
+
+ pad = ((uintptr_t)skb->data - (sizeof(*txpd) + hroom)) &
+ (NXPWIFI_DMA_ALIGN_SZ - 1);
+
+ skb_push(skb, sizeof(*txpd) + pad);
+
+ txpd = (struct uap_txpd *)skb->data;
+ memset(txpd, 0, sizeof(*txpd));
+ txpd->bss_num = priv->bss_num;
+ txpd->bss_type = priv->bss_type;
+ txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - (sizeof(*txpd) +
+ pad)));
+ txpd->priority = (u8)skb->priority;
+
+ txpd->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) {
+ txpd->tx_token_id = tx_info->ack_frame_id;
+ txpd->flags |= NXPWIFI_TXPD_FLAGS_REQ_TX_STATUS;
+ }
+
+ if (txpd->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.
+ */
+ txpd->tx_control =
+ cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[txpd->priority]);
+
+ /* Offset of actual data */
+ pkt_offset = sizeof(*txpd) + pad;
+ if (pkt_type == PKT_TYPE_MGMT) {
+ /* Set the packet type and add header for management frame */
+ txpd->tx_pkt_type = cpu_to_le16(pkt_type);
+ pkt_offset += NXPWIFI_MGMT_FRAME_HEADER_SIZE;
+ }
+
+ txpd->tx_pkt_offset = cpu_to_le16(pkt_offset);
+
+ /* make space for adapter->intf_hdr_len */
+ skb_push(skb, hroom);
+
+ if (!txpd->tx_control)
+ /* TxCtrl set by user or default */
+ txpd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
+}
--
2.34.1
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