From: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
Moved 'drivers/staging/wilc1000/mon.c' to
'drivers/net/wireless/microchip/wilc1000/mon.c'.
Signed-off-by: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
---
drivers/net/wireless/microchip/wilc1000/mon.c | 260 ++++++++++++++++++
1 file changed, 260 insertions(+)
create mode 100644 drivers/net/wireless/microchip/wilc1000/mon.c
diff --git a/drivers/net/wireless/microchip/wilc1000/mon.c b/drivers/net/wireless/microchip/wilc1000/mon.c
new file mode 100644
index 000000000000..60331417bd98
--- /dev/null
+++ b/drivers/net/wireless/microchip/wilc1000/mon.c
@@ -0,0 +1,260 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
+ * All rights reserved.
+ */
+
+#include "cfg80211.h"
+
+struct wilc_wfi_radiotap_hdr {
+ struct ieee80211_radiotap_header hdr;
+ u8 rate;
+} __packed;
+
+struct wilc_wfi_radiotap_cb_hdr {
+ struct ieee80211_radiotap_header hdr;
+ u8 rate;
+ u8 dump;
+ u16 tx_flags;
+} __packed;
+
+#define TX_RADIOTAP_PRESENT ((1 << IEEE80211_RADIOTAP_RATE) | \
+ (1 << IEEE80211_RADIOTAP_TX_FLAGS))
+
+void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size)
+{
+ u32 header, pkt_offset;
+ struct sk_buff *skb = NULL;
+ struct wilc_wfi_radiotap_hdr *hdr;
+ struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
+
+ if (!mon_dev)
+ return;
+
+ if (!netif_running(mon_dev))
+ return;
+
+ /* Get WILC header */
+ header = get_unaligned_le32(buff - HOST_HDR_OFFSET);
+ /*
+ * The packet offset field contain info about what type of management
+ * the frame we are dealing with and ack status
+ */
+ pkt_offset = FIELD_GET(WILC_PKT_HDR_OFFSET_FIELD, header);
+
+ if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
+ /* hostapd callback mgmt frame */
+
+ skb = dev_alloc_skb(size + sizeof(*cb_hdr));
+ if (!skb)
+ return;
+
+ skb_put_data(skb, buff, size);
+
+ cb_hdr = skb_push(skb, sizeof(*cb_hdr));
+ memset(cb_hdr, 0, sizeof(*cb_hdr));
+
+ cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
+
+ cb_hdr->hdr.it_len = cpu_to_le16(sizeof(*cb_hdr));
+
+ cb_hdr->hdr.it_present = cpu_to_le32(TX_RADIOTAP_PRESENT);
+
+ cb_hdr->rate = 5;
+
+ if (pkt_offset & IS_MGMT_STATUS_SUCCES) {
+ /* success */
+ cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS;
+ } else {
+ cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL;
+ }
+
+ } else {
+ skb = dev_alloc_skb(size + sizeof(*hdr));
+
+ if (!skb)
+ return;
+
+ skb_put_data(skb, buff, size);
+ hdr = skb_push(skb, sizeof(*hdr));
+ memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr));
+ hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
+ hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
+ hdr->hdr.it_present = cpu_to_le32
+ (1 << IEEE80211_RADIOTAP_RATE);
+ hdr->rate = 5;
+ }
+
+ skb->dev = mon_dev;
+ skb_reset_mac_header(skb);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = htons(ETH_P_802_2);
+ memset(skb->cb, 0, sizeof(skb->cb));
+
+ netif_rx(skb);
+}
+
+struct tx_complete_mon_data {
+ int size;
+ void *buff;
+};
+
+static void mgmt_tx_complete(void *priv, int status)
+{
+ struct tx_complete_mon_data *pv_data = priv;
+ /*
+ * in case of fully hosting mode, the freeing will be done
+ * in response to the cfg packet
+ */
+ kfree(pv_data->buff);
+
+ kfree(pv_data);
+}
+
+static int mon_mgmt_tx(struct net_device *dev, const u8 *buf, size_t len)
+{
+ struct tx_complete_mon_data *mgmt_tx = NULL;
+
+ if (!dev)
+ return -EFAULT;
+
+ netif_stop_queue(dev);
+ mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC);
+ if (!mgmt_tx)
+ return -ENOMEM;
+
+ mgmt_tx->buff = kmemdup(buf, len, GFP_ATOMIC);
+ if (!mgmt_tx->buff) {
+ kfree(mgmt_tx);
+ return -ENOMEM;
+ }
+
+ mgmt_tx->size = len;
+
+ wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size,
+ mgmt_tx_complete);
+
+ netif_wake_queue(dev);
+ return 0;
+}
+
+static netdev_tx_t wilc_wfi_mon_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ u32 rtap_len, ret = 0;
+ struct wilc_wfi_mon_priv *mon_priv;
+ struct sk_buff *skb2;
+ struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
+ u8 srcadd[ETH_ALEN];
+ u8 bssid[ETH_ALEN];
+
+ mon_priv = netdev_priv(dev);
+ if (!mon_priv)
+ return -EFAULT;
+
+ rtap_len = ieee80211_get_radiotap_len(skb->data);
+ if (skb->len < rtap_len)
+ return -1;
+
+ skb_pull(skb, rtap_len);
+
+ if (skb->data[0] == 0xc0 && is_broadcast_ether_addr(&skb->data[4])) {
+ skb2 = dev_alloc_skb(skb->len + sizeof(*cb_hdr));
+ if (!skb2)
+ return -ENOMEM;
+
+ skb_put_data(skb2, skb->data, skb->len);
+
+ cb_hdr = skb_push(skb2, sizeof(*cb_hdr));
+ memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
+
+ cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
+
+ cb_hdr->hdr.it_len = cpu_to_le16(sizeof(*cb_hdr));
+
+ cb_hdr->hdr.it_present = cpu_to_le32(TX_RADIOTAP_PRESENT);
+
+ cb_hdr->rate = 5;
+ cb_hdr->tx_flags = 0x0004;
+
+ skb2->dev = dev;
+ skb_reset_mac_header(skb2);
+ skb2->ip_summed = CHECKSUM_UNNECESSARY;
+ skb2->pkt_type = PACKET_OTHERHOST;
+ skb2->protocol = htons(ETH_P_802_2);
+ memset(skb2->cb, 0, sizeof(skb2->cb));
+
+ netif_rx(skb2);
+
+ return 0;
+ }
+ skb->dev = mon_priv->real_ndev;
+
+ ether_addr_copy(srcadd, &skb->data[10]);
+ ether_addr_copy(bssid, &skb->data[16]);
+ /*
+ * Identify if data or mgmt packet, if source address and bssid
+ * fields are equal send it to mgmt frames handler
+ */
+ if (!(memcmp(srcadd, bssid, 6))) {
+ ret = mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len);
+ if (ret)
+ netdev_err(dev, "fail to mgmt tx\n");
+ dev_kfree_skb(skb);
+ } else {
+ ret = wilc_mac_xmit(skb, mon_priv->real_ndev);
+ }
+
+ return ret;
+}
+
+static const struct net_device_ops wilc_wfi_netdev_ops = {
+ .ndo_start_xmit = wilc_wfi_mon_xmit,
+
+};
+
+struct net_device *wilc_wfi_init_mon_interface(struct wilc *wl,
+ const char *name,
+ struct net_device *real_dev)
+{
+ struct wilc_wfi_mon_priv *priv;
+
+ /* If monitor interface is already initialized, return it */
+ if (wl->monitor_dev)
+ return wl->monitor_dev;
+
+ wl->monitor_dev = alloc_etherdev(sizeof(struct wilc_wfi_mon_priv));
+ if (!wl->monitor_dev)
+ return NULL;
+
+ wl->monitor_dev->type = ARPHRD_IEEE80211_RADIOTAP;
+ strncpy(wl->monitor_dev->name, name, IFNAMSIZ);
+ wl->monitor_dev->name[IFNAMSIZ - 1] = 0;
+ wl->monitor_dev->netdev_ops = &wilc_wfi_netdev_ops;
+ wl->monitor_dev->needs_free_netdev = true;
+
+ if (register_netdevice(wl->monitor_dev)) {
+ netdev_err(real_dev, "register_netdevice failed\n");
+ return NULL;
+ }
+ priv = netdev_priv(wl->monitor_dev);
+ if (!priv)
+ return NULL;
+
+ priv->real_ndev = real_dev;
+
+ return wl->monitor_dev;
+}
+
+void wilc_wfi_deinit_mon_interface(struct wilc *wl, bool rtnl_locked)
+{
+ if (!wl->monitor_dev)
+ return;
+
+ if (rtnl_locked)
+ unregister_netdevice(wl->monitor_dev);
+ else
+ unregister_netdev(wl->monitor_dev);
+ wl->monitor_dev = NULL;
+}
--
2.24.0
