From 20f2c5fa3af060401c72e444999470a4cab641cf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Thu, 26 Dec 2019 14:30:50 +0100 Subject: [PATCH] brcmfmac: add initial support for monitor mode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Report monitor interface availability using cfg80211 and support it in the add_virtual_intf() and del_virtual_intf() callbacks. This new feature is conditional and depends on firmware flagging monitor packets. Receiving monitor frames is already handled by the brcmf_netif_mon_rx(). Signed-off-by: Rafał Miłecki Signed-off-by: Kalle Valo --- .../broadcom/brcm80211/brcmfmac/cfg80211.c | 112 ++++++++++++++++-- .../broadcom/brcm80211/brcmfmac/core.c | 68 ++++++++++- .../broadcom/brcm80211/brcmfmac/core.h | 2 + .../broadcom/brcm80211/brcmfmac/feature.c | 1 + .../broadcom/brcm80211/brcmfmac/feature.h | 2 + .../broadcom/brcm80211/brcmfmac/fwil.h | 2 + 6 files changed, 174 insertions(+), 13 deletions(-) --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -619,6 +620,82 @@ static bool brcmf_is_ibssmode(struct brc return vif->wdev.iftype == NL80211_IFTYPE_ADHOC; } +/** + * brcmf_mon_add_vif() - create monitor mode virtual interface + * + * @wiphy: wiphy device of new interface. + * @name: name of the new interface. + */ +static struct wireless_dev *brcmf_mon_add_vif(struct wiphy *wiphy, + const char *name) +{ + struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); + struct brcmf_cfg80211_vif *vif; + struct net_device *ndev; + struct brcmf_if *ifp; + int err; + + if (cfg->pub->mon_if) { + err = -EEXIST; + goto err_out; + } + + vif = brcmf_alloc_vif(cfg, NL80211_IFTYPE_MONITOR); + if (IS_ERR(vif)) { + err = PTR_ERR(vif); + goto err_out; + } + + ndev = alloc_netdev(sizeof(*ifp), name, NET_NAME_UNKNOWN, ether_setup); + if (!ndev) { + err = -ENOMEM; + goto err_free_vif; + } + ndev->type = ARPHRD_IEEE80211_RADIOTAP; + ndev->ieee80211_ptr = &vif->wdev; + ndev->needs_free_netdev = true; + ndev->priv_destructor = brcmf_cfg80211_free_netdev; + SET_NETDEV_DEV(ndev, wiphy_dev(cfg->wiphy)); + + ifp = netdev_priv(ndev); + ifp->vif = vif; + ifp->ndev = ndev; + ifp->drvr = cfg->pub; + + vif->ifp = ifp; + vif->wdev.netdev = ndev; + + err = brcmf_net_mon_attach(ifp); + if (err) { + brcmf_err("Failed to attach %s device\n", ndev->name); + free_netdev(ndev); + goto err_free_vif; + } + + cfg->pub->mon_if = ifp; + + return &vif->wdev; + +err_free_vif: + brcmf_free_vif(vif); +err_out: + return ERR_PTR(err); +} + +static int brcmf_mon_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) +{ + struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); + struct net_device *ndev = wdev->netdev; + + ndev->netdev_ops->ndo_stop(ndev); + + brcmf_net_detach(ndev, true); + + cfg->pub->mon_if = NULL; + + return 0; +} + static struct wireless_dev *brcmf_cfg80211_add_iface(struct wiphy *wiphy, const char *name, unsigned char name_assign_type, @@ -641,9 +718,10 @@ static struct wireless_dev *brcmf_cfg802 case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_WDS: - case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_MESH_POINT: return ERR_PTR(-EOPNOTSUPP); + case NL80211_IFTYPE_MONITOR: + return brcmf_mon_add_vif(wiphy, name); case NL80211_IFTYPE_AP: wdev = brcmf_ap_add_vif(wiphy, name, params); break; @@ -826,9 +904,10 @@ int brcmf_cfg80211_del_iface(struct wiph case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_WDS: - case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_MESH_POINT: return -EOPNOTSUPP; + case NL80211_IFTYPE_MONITOR: + return brcmf_mon_del_vif(wiphy, wdev); case NL80211_IFTYPE_AP: return brcmf_cfg80211_del_ap_iface(wiphy, wdev); case NL80211_IFTYPE_P2P_CLIENT: @@ -6471,9 +6550,10 @@ static int brcmf_setup_ifmodes(struct wi struct ieee80211_iface_limit *c0_limits = NULL; struct ieee80211_iface_limit *p2p_limits = NULL; struct ieee80211_iface_limit *mbss_limits = NULL; - bool mbss, p2p, rsdb, mchan; - int i, c, n_combos; + bool mon_flag, mbss, p2p, rsdb, mchan; + int i, c, n_combos, n_limits; + mon_flag = brcmf_feat_is_enabled(ifp, BRCMF_FEAT_MONITOR_FLAG); mbss = brcmf_feat_is_enabled(ifp, BRCMF_FEAT_MBSS); p2p = brcmf_feat_is_enabled(ifp, BRCMF_FEAT_P2P); rsdb = brcmf_feat_is_enabled(ifp, BRCMF_FEAT_RSDB); @@ -6487,6 +6567,8 @@ static int brcmf_setup_ifmodes(struct wi wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP); + if (mon_flag) + wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); if (p2p) wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO) | @@ -6494,18 +6576,18 @@ static int brcmf_setup_ifmodes(struct wi c = 0; i = 0; - if (p2p && rsdb) - c0_limits = kcalloc(4, sizeof(*c0_limits), GFP_KERNEL); - else if (p2p) - c0_limits = kcalloc(3, sizeof(*c0_limits), GFP_KERNEL); - else - c0_limits = kcalloc(2, sizeof(*c0_limits), GFP_KERNEL); + n_limits = 1 + mon_flag + (p2p ? 2 : 0) + (rsdb || !p2p); + c0_limits = kcalloc(n_limits, sizeof(*c0_limits), GFP_KERNEL); if (!c0_limits) goto err; combo[c].num_different_channels = 1 + (rsdb || (p2p && mchan)); c0_limits[i].max = 1 + rsdb; c0_limits[i++].types = BIT(NL80211_IFTYPE_STATION); + if (mon_flag) { + c0_limits[i].max = 1; + c0_limits[i++].types = BIT(NL80211_IFTYPE_MONITOR); + } if (p2p) { c0_limits[i].max = 1; c0_limits[i++].types = BIT(NL80211_IFTYPE_P2P_DEVICE); @@ -6554,14 +6636,20 @@ static int brcmf_setup_ifmodes(struct wi if (mbss) { c++; i = 0; - mbss_limits = kcalloc(1, sizeof(*mbss_limits), GFP_KERNEL); + n_limits = 1 + mon_flag; + mbss_limits = kcalloc(n_limits, sizeof(*mbss_limits), + GFP_KERNEL); if (!mbss_limits) goto err; mbss_limits[i].max = 4; mbss_limits[i++].types = BIT(NL80211_IFTYPE_AP); + if (mon_flag) { + mbss_limits[i].max = 1; + mbss_limits[i++].types = BIT(NL80211_IFTYPE_MONITOR); + } combo[c].beacon_int_infra_match = true; combo[c].num_different_channels = 1; - combo[c].max_interfaces = 4; + combo[c].max_interfaces = 4 + mon_flag; combo[c].n_limits = i; combo[c].limits = mbss_limits; } --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -690,7 +690,7 @@ fail: return -EBADE; } -static void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked) +void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked) { if (ndev->reg_state == NETREG_REGISTERED) { if (rtnl_locked) @@ -703,6 +703,72 @@ static void brcmf_net_detach(struct net_ } } +static int brcmf_net_mon_open(struct net_device *ndev) +{ + struct brcmf_if *ifp = netdev_priv(ndev); + struct brcmf_pub *drvr = ifp->drvr; + u32 monitor; + int err; + + brcmf_dbg(TRACE, "Enter\n"); + + err = brcmf_fil_cmd_int_get(ifp, BRCMF_C_GET_MONITOR, &monitor); + if (err) { + bphy_err(drvr, "BRCMF_C_GET_MONITOR error (%d)\n", err); + return err; + } else if (monitor) { + bphy_err(drvr, "Monitor mode is already enabled\n"); + return -EEXIST; + } + + monitor = 3; + err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_MONITOR, monitor); + if (err) + bphy_err(drvr, "BRCMF_C_SET_MONITOR error (%d)\n", err); + + return err; +} + +static int brcmf_net_mon_stop(struct net_device *ndev) +{ + struct brcmf_if *ifp = netdev_priv(ndev); + struct brcmf_pub *drvr = ifp->drvr; + u32 monitor; + int err; + + brcmf_dbg(TRACE, "Enter\n"); + + monitor = 0; + err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_MONITOR, monitor); + if (err) + bphy_err(drvr, "BRCMF_C_SET_MONITOR error (%d)\n", err); + + return err; +} + +static const struct net_device_ops brcmf_netdev_ops_mon = { + .ndo_open = brcmf_net_mon_open, + .ndo_stop = brcmf_net_mon_stop, +}; + +int brcmf_net_mon_attach(struct brcmf_if *ifp) +{ + struct brcmf_pub *drvr = ifp->drvr; + struct net_device *ndev; + int err; + + brcmf_dbg(TRACE, "Enter\n"); + + ndev = ifp->ndev; + ndev->netdev_ops = &brcmf_netdev_ops_mon; + + err = register_netdevice(ndev); + if (err) + bphy_err(drvr, "Failed to register %s device\n", ndev->name); + + return err; +} + void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on) { struct net_device *ndev; --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h @@ -210,6 +210,8 @@ void brcmf_txflowblock_if(struct brcmf_i void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success); void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb); void brcmf_netif_mon_rx(struct brcmf_if *ifp, struct sk_buff *skb); +void brcmf_net_detach(struct net_device *ndev, bool rtnl_locked); +int brcmf_net_mon_attach(struct brcmf_if *ifp); void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on); int __init brcmf_core_init(void); void __exit brcmf_core_exit(void); --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c @@ -38,6 +38,7 @@ static const struct brcmf_feat_fwcap brc { BRCMF_FEAT_MCHAN, "mchan" }, { BRCMF_FEAT_P2P, "p2p" }, { BRCMF_FEAT_MONITOR, "monitor" }, + { BRCMF_FEAT_MONITOR_FLAG, "rtap" }, { BRCMF_FEAT_MONITOR_FMT_RADIOTAP, "rtap" }, { BRCMF_FEAT_DOT11H, "802.11h" } }; --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h @@ -23,6 +23,7 @@ * GSCAN: enhanced scan offload feature. * FWSUP: Firmware supplicant. * MONITOR: firmware can pass monitor packets to host. + * MONITOR_FLAG: firmware flags monitor packets. * MONITOR_FMT_RADIOTAP: firmware provides monitor packets with radiotap header * MONITOR_FMT_HW_RX_HDR: firmware provides monitor packets with hw/ucode header * DOT11H: firmware supports 802.11h @@ -43,6 +44,7 @@ BRCMF_FEAT_DEF(GSCAN) \ BRCMF_FEAT_DEF(FWSUP) \ BRCMF_FEAT_DEF(MONITOR) \ + BRCMF_FEAT_DEF(MONITOR_FLAG) \ BRCMF_FEAT_DEF(MONITOR_FMT_RADIOTAP) \ BRCMF_FEAT_DEF(MONITOR_FMT_HW_RX_HDR) \ BRCMF_FEAT_DEF(DOT11H) --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h @@ -49,6 +49,8 @@ #define BRCMF_C_GET_PM 85 #define BRCMF_C_SET_PM 86 #define BRCMF_C_GET_REVINFO 98 +#define BRCMF_C_GET_MONITOR 107 +#define BRCMF_C_SET_MONITOR 108 #define BRCMF_C_GET_CURR_RATESET 114 #define BRCMF_C_GET_AP 117 #define BRCMF_C_SET_AP 118