--- /dev/null
- dev->destructor = free_netdev;
+/*
+ * Copyright (c) 2015-2016 Quantenna Communications, Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/if_ether.h>
+
+#include "core.h"
+#include "bus.h"
+#include "trans.h"
+#include "commands.h"
+#include "cfg80211.h"
+#include "event.h"
+#include "util.h"
+
+#define QTNF_DMP_MAX_LEN 48
+#define QTNF_PRIMARY_VIF_IDX 0
+
+struct qtnf_frame_meta_info {
+ u8 magic_s;
+ u8 ifidx;
+ u8 macid;
+ u8 magic_e;
+} __packed;
+
+struct qtnf_wmac *qtnf_core_get_mac(const struct qtnf_bus *bus, u8 macid)
+{
+ struct qtnf_wmac *mac = NULL;
+
+ if (unlikely(macid >= QTNF_MAX_MAC)) {
+ pr_err("invalid MAC index %u\n", macid);
+ return NULL;
+ }
+
+ mac = bus->mac[macid];
+
+ if (unlikely(!mac)) {
+ pr_err("MAC%u: not initialized\n", macid);
+ return NULL;
+ }
+
+ return mac;
+}
+
+/* Netdev handler for open.
+ */
+static int qtnf_netdev_open(struct net_device *ndev)
+{
+ netif_carrier_off(ndev);
+ qtnf_netdev_updown(ndev, 1);
+ return 0;
+}
+
+/* Netdev handler for close.
+ */
+static int qtnf_netdev_close(struct net_device *ndev)
+{
+ netif_carrier_off(ndev);
+ qtnf_virtual_intf_cleanup(ndev);
+ qtnf_netdev_updown(ndev, 0);
+ return 0;
+}
+
+/* Netdev handler for data transmission.
+ */
+static int
+qtnf_netdev_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct qtnf_vif *vif;
+ struct qtnf_wmac *mac;
+
+ vif = qtnf_netdev_get_priv(ndev);
+
+ if (unlikely(skb->dev != ndev)) {
+ pr_err_ratelimited("invalid skb->dev");
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) {
+ pr_err_ratelimited("%s: VIF not initialized\n", ndev->name);
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ mac = vif->mac;
+ if (unlikely(!mac)) {
+ pr_err_ratelimited("%s: NULL mac pointer", ndev->name);
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
+ if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
+ pr_err_ratelimited("%s: invalid skb len %d\n", ndev->name,
+ skb->len);
+ dev_kfree_skb_any(skb);
+ ndev->stats.tx_dropped++;
+ return 0;
+ }
+
+ /* tx path is enabled: reset vif timeout */
+ vif->cons_tx_timeout_cnt = 0;
+
+ return qtnf_bus_data_tx(mac->bus, skb);
+}
+
+/* Netdev handler for getting stats.
+ */
+static struct net_device_stats *qtnf_netdev_get_stats(struct net_device *dev)
+{
+ return &dev->stats;
+}
+
+/* Netdev handler for transmission timeout.
+ */
+static void qtnf_netdev_tx_timeout(struct net_device *ndev)
+{
+ struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev);
+ struct qtnf_wmac *mac;
+ struct qtnf_bus *bus;
+
+ if (unlikely(!vif || !vif->mac || !vif->mac->bus))
+ return;
+
+ mac = vif->mac;
+ bus = mac->bus;
+
+ pr_warn("VIF%u.%u: Tx timeout- %lu\n", mac->macid, vif->vifid, jiffies);
+
+ qtnf_bus_data_tx_timeout(bus, ndev);
+ ndev->stats.tx_errors++;
+
+ if (++vif->cons_tx_timeout_cnt > QTNF_TX_TIMEOUT_TRSHLD) {
+ pr_err("Tx timeout threshold exceeded !\n");
+ pr_err("schedule interface %s reset !\n", netdev_name(ndev));
+ queue_work(bus->workqueue, &vif->reset_work);
+ }
+}
+
+/* Network device ops handlers */
+const struct net_device_ops qtnf_netdev_ops = {
+ .ndo_open = qtnf_netdev_open,
+ .ndo_stop = qtnf_netdev_close,
+ .ndo_start_xmit = qtnf_netdev_hard_start_xmit,
+ .ndo_tx_timeout = qtnf_netdev_tx_timeout,
+ .ndo_get_stats = qtnf_netdev_get_stats,
+};
+
+static int qtnf_mac_init_single_band(struct wiphy *wiphy,
+ struct qtnf_wmac *mac,
+ enum nl80211_band band)
+{
+ int ret;
+
+ wiphy->bands[band] = kzalloc(sizeof(*wiphy->bands[band]), GFP_KERNEL);
+ if (!wiphy->bands[band])
+ return -ENOMEM;
+
+ wiphy->bands[band]->band = band;
+
+ ret = qtnf_cmd_get_mac_chan_info(mac, wiphy->bands[band]);
+ if (ret) {
+ pr_err("MAC%u: band %u: failed to get chans info: %d\n",
+ mac->macid, band, ret);
+ return ret;
+ }
+
+ qtnf_band_init_rates(wiphy->bands[band]);
+ qtnf_band_setup_htvht_caps(&mac->macinfo, wiphy->bands[band]);
+
+ return 0;
+}
+
+static int qtnf_mac_init_bands(struct qtnf_wmac *mac)
+{
+ struct wiphy *wiphy = priv_to_wiphy(mac);
+ int ret = 0;
+
+ if (mac->macinfo.bands_cap & QLINK_BAND_2GHZ) {
+ ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_2GHZ);
+ if (ret)
+ goto out;
+ }
+
+ if (mac->macinfo.bands_cap & QLINK_BAND_5GHZ) {
+ ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_5GHZ);
+ if (ret)
+ goto out;
+ }
+
+ if (mac->macinfo.bands_cap & QLINK_BAND_60GHZ)
+ ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_60GHZ);
+
+out:
+ return ret;
+}
+
+struct qtnf_vif *qtnf_mac_get_free_vif(struct qtnf_wmac *mac)
+{
+ struct qtnf_vif *vif;
+ int i;
+
+ for (i = 0; i < QTNF_MAX_INTF; i++) {
+ vif = &mac->iflist[i];
+ if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)
+ return vif;
+ }
+
+ return NULL;
+}
+
+struct qtnf_vif *qtnf_mac_get_base_vif(struct qtnf_wmac *mac)
+{
+ struct qtnf_vif *vif;
+
+ vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX];
+
+ if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)
+ return NULL;
+
+ return vif;
+}
+
+static void qtnf_vif_reset_handler(struct work_struct *work)
+{
+ struct qtnf_vif *vif = container_of(work, struct qtnf_vif, reset_work);
+
+ rtnl_lock();
+
+ if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
+ rtnl_unlock();
+ return;
+ }
+
+ /* stop tx completely */
+ netif_tx_stop_all_queues(vif->netdev);
+ if (netif_carrier_ok(vif->netdev))
+ netif_carrier_off(vif->netdev);
+
+ qtnf_cfg80211_vif_reset(vif);
+
+ rtnl_unlock();
+}
+
+static void qtnf_mac_init_primary_intf(struct qtnf_wmac *mac)
+{
+ struct qtnf_vif *vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX];
+
+ vif->wdev.iftype = NL80211_IFTYPE_AP;
+ vif->bss_priority = QTNF_DEF_BSS_PRIORITY;
+ vif->wdev.wiphy = priv_to_wiphy(mac);
+ INIT_WORK(&vif->reset_work, qtnf_vif_reset_handler);
+ vif->cons_tx_timeout_cnt = 0;
+}
+
+static struct qtnf_wmac *qtnf_core_mac_alloc(struct qtnf_bus *bus,
+ unsigned int macid)
+{
+ struct wiphy *wiphy;
+ struct qtnf_wmac *mac;
+ unsigned int i;
+
+ wiphy = qtnf_wiphy_allocate(bus);
+ if (!wiphy)
+ return ERR_PTR(-ENOMEM);
+
+ mac = wiphy_priv(wiphy);
+
+ mac->macid = macid;
+ mac->bus = bus;
+
+ for (i = 0; i < QTNF_MAX_INTF; i++) {
+ memset(&mac->iflist[i], 0, sizeof(struct qtnf_vif));
+ mac->iflist[i].wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+ mac->iflist[i].mac = mac;
+ mac->iflist[i].vifid = i;
+ qtnf_sta_list_init(&mac->iflist[i].sta_list);
+ }
+
+ qtnf_mac_init_primary_intf(mac);
+ bus->mac[macid] = mac;
+
+ return mac;
+}
+
+int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *vif,
+ const char *name, unsigned char name_assign_type,
+ enum nl80211_iftype iftype)
+{
+ struct wiphy *wiphy = priv_to_wiphy(mac);
+ struct net_device *dev;
+ void *qdev_vif;
+ int ret;
+
+ dev = alloc_netdev_mqs(sizeof(struct qtnf_vif *), name,
+ name_assign_type, ether_setup, 1, 1);
+ if (!dev) {
+ memset(&vif->wdev, 0, sizeof(vif->wdev));
+ vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+ return -ENOMEM;
+ }
+
+ vif->netdev = dev;
+
+ dev->netdev_ops = &qtnf_netdev_ops;
++ dev->needs_free_netdev = true;
+ dev_net_set(dev, wiphy_net(wiphy));
+ dev->ieee80211_ptr = &vif->wdev;
+ dev->ieee80211_ptr->iftype = iftype;
+ ether_addr_copy(dev->dev_addr, vif->mac_addr);
+ SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
+ dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
+ dev->watchdog_timeo = QTNF_DEF_WDOG_TIMEOUT;
+ dev->tx_queue_len = 100;
+
+ qdev_vif = netdev_priv(dev);
+ *((void **)qdev_vif) = vif;
+
+ SET_NETDEV_DEV(dev, mac->bus->dev);
+
+ ret = register_netdevice(dev);
+ if (ret) {
+ free_netdev(dev);
+ vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+ }
+
+ return ret;
+}
+
+static void qtnf_core_mac_detach(struct qtnf_bus *bus, unsigned int macid)
+{
+ struct qtnf_wmac *mac;
+ struct wiphy *wiphy;
+ struct qtnf_vif *vif;
+ unsigned int i;
+ enum nl80211_band band;
+
+ mac = bus->mac[macid];
+
+ if (!mac)
+ return;
+
+ wiphy = priv_to_wiphy(mac);
+
+ for (i = 0; i < QTNF_MAX_INTF; i++) {
+ vif = &mac->iflist[i];
+ rtnl_lock();
+ if (vif->netdev &&
+ vif->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED) {
+ qtnf_virtual_intf_cleanup(vif->netdev);
+ qtnf_del_virtual_intf(wiphy, &vif->wdev);
+ }
+ rtnl_unlock();
+ qtnf_sta_list_free(&vif->sta_list);
+ }
+
+ if (mac->wiphy_registered)
+ wiphy_unregister(wiphy);
+
+ for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; ++band) {
+ if (!wiphy->bands[band])
+ continue;
+
+ kfree(wiphy->bands[band]->channels);
+ wiphy->bands[band]->n_channels = 0;
+
+ kfree(wiphy->bands[band]);
+ wiphy->bands[band] = NULL;
+ }
+
+ kfree(mac->macinfo.limits);
+ kfree(wiphy->iface_combinations);
+ wiphy_free(wiphy);
+ bus->mac[macid] = NULL;
+}
+
+static int qtnf_core_mac_attach(struct qtnf_bus *bus, unsigned int macid)
+{
+ struct qtnf_wmac *mac;
+ struct qtnf_vif *vif;
+ int ret;
+
+ if (!(bus->hw_info.mac_bitmap & BIT(macid))) {
+ pr_info("MAC%u is not active in FW\n", macid);
+ return 0;
+ }
+
+ mac = qtnf_core_mac_alloc(bus, macid);
+ if (IS_ERR(mac)) {
+ pr_err("MAC%u allocation failed\n", macid);
+ return PTR_ERR(mac);
+ }
+
+ ret = qtnf_cmd_get_mac_info(mac);
+ if (ret) {
+ pr_err("MAC%u: failed to get info\n", macid);
+ goto error;
+ }
+
+ vif = qtnf_mac_get_base_vif(mac);
+ if (!vif) {
+ pr_err("MAC%u: primary VIF is not ready\n", macid);
+ ret = -EFAULT;
+ goto error;
+ }
+
+ ret = qtnf_cmd_send_add_intf(vif, NL80211_IFTYPE_AP, vif->mac_addr);
+ if (ret) {
+ pr_err("MAC%u: failed to add VIF\n", macid);
+ goto error;
+ }
+
+ ret = qtnf_cmd_send_get_phy_params(mac);
+ if (ret) {
+ pr_err("MAC%u: failed to get PHY settings\n", macid);
+ goto error;
+ }
+
+ ret = qtnf_mac_init_bands(mac);
+ if (ret) {
+ pr_err("MAC%u: failed to init bands\n", macid);
+ goto error;
+ }
+
+ ret = qtnf_wiphy_register(&bus->hw_info, mac);
+ if (ret) {
+ pr_err("MAC%u: wiphy registration failed\n", macid);
+ goto error;
+ }
+
+ mac->wiphy_registered = 1;
+
+ rtnl_lock();
+
+ ret = qtnf_core_net_attach(mac, vif, "wlan%d", NET_NAME_ENUM,
+ NL80211_IFTYPE_AP);
+ rtnl_unlock();
+
+ if (ret) {
+ pr_err("MAC%u: failed to attach netdev\n", macid);
+ vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+ vif->netdev = NULL;
+ goto error;
+ }
+
+ pr_debug("MAC%u initialized\n", macid);
+
+ return 0;
+
+error:
+ qtnf_core_mac_detach(bus, macid);
+ return ret;
+}
+
+int qtnf_core_attach(struct qtnf_bus *bus)
+{
+ unsigned int i;
+ int ret;
+
+ qtnf_trans_init(bus);
+
+ bus->fw_state = QTNF_FW_STATE_BOOT_DONE;
+ qtnf_bus_data_rx_start(bus);
+
+ bus->workqueue = alloc_ordered_workqueue("QTNF_BUS", 0);
+ if (!bus->workqueue) {
+ pr_err("failed to alloc main workqueue\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ INIT_WORK(&bus->event_work, qtnf_event_work_handler);
+
+ ret = qtnf_cmd_send_init_fw(bus);
+ if (ret) {
+ pr_err("failed to init FW: %d\n", ret);
+ goto error;
+ }
+
+ bus->fw_state = QTNF_FW_STATE_ACTIVE;
+
+ ret = qtnf_cmd_get_hw_info(bus);
+ if (ret) {
+ pr_err("failed to get HW info: %d\n", ret);
+ goto error;
+ }
+
+ if (bus->hw_info.ql_proto_ver != QLINK_PROTO_VER) {
+ pr_err("qlink version mismatch %u != %u\n",
+ QLINK_PROTO_VER, bus->hw_info.ql_proto_ver);
+ ret = -EPROTONOSUPPORT;
+ goto error;
+ }
+
+ if (bus->hw_info.num_mac > QTNF_MAX_MAC) {
+ pr_err("no support for number of MACs=%u\n",
+ bus->hw_info.num_mac);
+ ret = -ERANGE;
+ goto error;
+ }
+
+ for (i = 0; i < bus->hw_info.num_mac; i++) {
+ ret = qtnf_core_mac_attach(bus, i);
+
+ if (ret) {
+ pr_err("MAC%u: attach failed: %d\n", i, ret);
+ goto error;
+ }
+ }
+
+ return 0;
+
+error:
+ qtnf_core_detach(bus);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(qtnf_core_attach);
+
+void qtnf_core_detach(struct qtnf_bus *bus)
+{
+ unsigned int macid;
+
+ qtnf_bus_data_rx_stop(bus);
+
+ for (macid = 0; macid < QTNF_MAX_MAC; macid++)
+ qtnf_core_mac_detach(bus, macid);
+
+ if (bus->fw_state == QTNF_FW_STATE_ACTIVE)
+ qtnf_cmd_send_deinit_fw(bus);
+
+ bus->fw_state = QTNF_FW_STATE_DEAD;
+
+ if (bus->workqueue) {
+ flush_workqueue(bus->workqueue);
+ destroy_workqueue(bus->workqueue);
+ }
+
+ qtnf_trans_free(bus);
+}
+EXPORT_SYMBOL_GPL(qtnf_core_detach);
+
+static inline int qtnf_is_frame_meta_magic_valid(struct qtnf_frame_meta_info *m)
+{
+ return m->magic_s == 0xAB && m->magic_e == 0xBA;
+}
+
+struct net_device *qtnf_classify_skb(struct qtnf_bus *bus, struct sk_buff *skb)
+{
+ struct qtnf_frame_meta_info *meta;
+ struct net_device *ndev = NULL;
+ struct qtnf_wmac *mac;
+ struct qtnf_vif *vif;
+
+ meta = (struct qtnf_frame_meta_info *)
+ (skb_tail_pointer(skb) - sizeof(*meta));
+
+ if (unlikely(!qtnf_is_frame_meta_magic_valid(meta))) {
+ pr_err_ratelimited("invalid magic 0x%x:0x%x\n",
+ meta->magic_s, meta->magic_e);
+ goto out;
+ }
+
+ if (unlikely(meta->macid >= QTNF_MAX_MAC)) {
+ pr_err_ratelimited("invalid mac(%u)\n", meta->macid);
+ goto out;
+ }
+
+ if (unlikely(meta->ifidx >= QTNF_MAX_INTF)) {
+ pr_err_ratelimited("invalid vif(%u)\n", meta->ifidx);
+ goto out;
+ }
+
+ mac = bus->mac[meta->macid];
+
+ if (unlikely(!mac)) {
+ pr_err_ratelimited("mac(%d) does not exist\n", meta->macid);
+ goto out;
+ }
+
+ vif = &mac->iflist[meta->ifidx];
+
+ if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) {
+ pr_err_ratelimited("vif(%u) does not exists\n", meta->ifidx);
+ goto out;
+ }
+
+ ndev = vif->netdev;
+
+ if (unlikely(!ndev)) {
+ pr_err_ratelimited("netdev for wlan%u.%u does not exists\n",
+ meta->macid, meta->ifidx);
+ goto out;
+ }
+
+ __skb_trim(skb, skb->len - sizeof(*meta));
+
+out:
+ return ndev;
+}
+EXPORT_SYMBOL_GPL(qtnf_classify_skb);
+
+MODULE_AUTHOR("Quantenna Communications");
+MODULE_DESCRIPTION("Quantenna 802.11 wireless LAN FullMAC driver.");
+MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi3.git / commitdiff