From b8a64f0e96c2b258321ee03975aeb0f5e88a055b Mon Sep 17 00:00:00 2001
From: Arend van Spriel <arend@broadcom.com>
Date: Fri, 9 Jun 2017 13:08:47 +0100
Subject: [PATCH] brcmfmac: support 4-way handshake offloading for WPA/WPA2-PSK
Git-commit: b8a64f0e96c2b258321ee03975aeb0f5e88a055b
Patch-mainline: v4.13-rc1
References: FATE#326294
The firmware may have supplicant code built-in. This is detected
by the driver and indicated in the wiphy features flags. User-space
can use this flag to determine whether or not to provide the
pre-shared key material in the nl80211 CONNECT command.
Reviewed-by: Gautam (Gautam Kumar) Shukla <gautams@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../broadcom/brcm80211/brcmfmac/cfg80211.c | 75 ++++++++++++++++++-
.../broadcom/brcm80211/brcmfmac/cfg80211.h | 14 +++-
.../broadcom/brcm80211/brcmfmac/feature.c | 1 +
.../broadcom/brcm80211/brcmfmac/feature.h | 4 +-
.../broadcom/brcm80211/brcmfmac/fweh.h | 30 ++++++++
.../broadcom/brcm80211/brcmfmac/fwil.h | 1 +
.../broadcom/brcm80211/brcmfmac/fwil_types.h | 16 ++++
7 files changed, 134 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 898c7b024c15..36945e0c8923 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -1357,6 +1357,27 @@ static u16 brcmf_map_fw_linkdown_reason(const struct brcmf_event_msg *e)
return reason;
}
+static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len)
+{
+ struct brcmf_wsec_pmk_le pmk;
+ int i, err;
+
+ /* convert to firmware key format */
+ pmk.key_len = cpu_to_le16(pmk_len << 1);
+ pmk.flags = cpu_to_le16(BRCMF_WSEC_PASSPHRASE);
+ for (i = 0; i < pmk_len; i++)
+ snprintf(&pmk.key[2 * i], 3, "%02x", pmk_data[i]);
+
+ /* store psk in firmware */
+ err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SET_WSEC_PMK,
+ &pmk, sizeof(pmk));
+ if (err < 0)
+ brcmf_err("failed to change PSK in firmware (len=%u)\n",
+ pmk_len);
+
+ return err;
+}
+
static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(vif->wdev.wiphy);
@@ -1379,6 +1400,10 @@ static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason)
clear_bit(BRCMF_VIF_STATUS_CONNECTING, &vif->sme_state);
clear_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status);
brcmf_btcoex_set_mode(vif, BRCMF_BTCOEX_ENABLED, 0);
+ if (vif->profile.use_fwsup != BRCMF_PROFILE_FWSUP_NONE) {
+ brcmf_set_pmk(vif->ifp, NULL, 0);
+ vif->profile.use_fwsup = BRCMF_PROFILE_FWSUP_NONE;
+ }
brcmf_dbg(TRACE, "Exit\n");
}
@@ -2012,6 +2037,23 @@ brcmf_cfg80211_connect(struct wiphy *wiphy, struct net_device *ndev,
goto done;
}
+ if (sme->crypto.psk) {
+ brcmf_dbg(INFO, "using PSK offload\n");
+
+ /* enable firmware supplicant for this interface */
+ err = brcmf_fil_iovar_int_set(ifp, "sup_wpa", 1);
+ if (err < 0) {
+ brcmf_err("failed to enable fw supplicant\n");
+ goto done;
+ }
+ ifp->vif->profile.use_fwsup = BRCMF_PROFILE_FWSUP_PSK;
+
+ err = brcmf_set_pmk(ifp, sme->crypto.psk,
+ BRCMF_WSEC_MAX_PSK_LEN);
+ if (err)
+ goto done;
+ }
+
/* Join with specific BSSID and cached SSID
* If SSID is zero join based on BSSID only
*/
@@ -5247,16 +5289,30 @@ void brcmf_cfg80211_free_netdev(struct net_device *ndev)
brcmf_free_vif(vif);
}
-static bool brcmf_is_linkup(const struct brcmf_event_msg *e)
+static bool brcmf_is_linkup(struct brcmf_cfg80211_vif *vif,
+ const struct brcmf_event_msg *e)
{
u32 event = e->event_code;
u32 status = e->status;
+ if (event == BRCMF_E_PSK_SUP &&
+ status == BRCMF_E_STATUS_FWSUP_COMPLETED)
+ set_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state);
if (event == BRCMF_E_SET_SSID && status == BRCMF_E_STATUS_SUCCESS) {
brcmf_dbg(CONN, "Processing set ssid\n");
- return true;
+ memcpy(vif->profile.bssid, e->addr, ETH_ALEN);
+ if (vif->profile.use_fwsup != BRCMF_PROFILE_FWSUP_PSK)
+ return true;
+
+ set_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state);
}
+ if (test_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state) &&
+ test_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state)) {
+ clear_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state);
+ clear_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state);
+ return true;
+ }
return false;
}
@@ -5291,6 +5347,13 @@ static bool brcmf_is_nonetwork(struct brcmf_cfg80211_info *cfg,
return true;
}
+ if (event == BRCMF_E_PSK_SUP &&
+ status != BRCMF_E_STATUS_FWSUP_COMPLETED) {
+ brcmf_dbg(CONN, "Processing failed supplicant state: %u\n",
+ status);
+ return true;
+ }
+
return false;
}
@@ -5448,7 +5511,6 @@ brcmf_bss_connect_done(struct brcmf_cfg80211_info *cfg,
&ifp->vif->sme_state)) {
if (completed) {
brcmf_get_assoc_ies(cfg, ifp);
- memcpy(profile->bssid, e->addr, ETH_ALEN);
brcmf_update_bss_info(cfg, ifp);
set_bit(BRCMF_VIF_STATUS_CONNECTED,
&ifp->vif->sme_state);
@@ -5527,7 +5589,7 @@ brcmf_notify_connect_status(struct brcmf_if *ifp,
if (brcmf_is_apmode(ifp->vif)) {
err = brcmf_notify_connect_status_ap(cfg, ndev, e, data);
- } else if (brcmf_is_linkup(e)) {
+ } else if (brcmf_is_linkup(ifp->vif, e)) {
brcmf_dbg(CONN, "Linkup\n");
if (brcmf_is_ibssmode(ifp->vif)) {
brcmf_inform_ibss(cfg, ndev, e->addr);
@@ -5695,6 +5757,8 @@ static void brcmf_register_event_handlers(struct brcmf_cfg80211_info *cfg)
brcmf_p2p_notify_action_tx_complete);
brcmf_fweh_register(cfg->pub, BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE,
brcmf_p2p_notify_action_tx_complete);
+ brcmf_fweh_register(cfg->pub, BRCMF_E_PSK_SUP,
+ brcmf_notify_connect_status);
}
static void brcmf_deinit_priv_mem(struct brcmf_cfg80211_info *cfg)
@@ -6491,6 +6555,9 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
if (!ifp->drvr->settings->roamoff)
wiphy->flags |= WIPHY_FLAG_SUPPORTS_FW_ROAM;
+ if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_FWSUP))
+ wiphy_ext_feature_set(wiphy,
+ NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK);
wiphy->mgmt_stypes = brcmf_txrx_stypes;
wiphy->max_remain_on_channel_duration = 5000;
if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_PNO)) {
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
index 12ff15446c6c..9e7d3c6f625e 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
@@ -115,6 +115,11 @@ struct brcmf_cfg80211_security {
u32 cipher_group;
};
+enum brcmf_profile_fwsup {
+ BRCMF_PROFILE_FWSUP_NONE,
+ BRCMF_PROFILE_FWSUP_PSK
+};
+
/**
* struct brcmf_cfg80211_profile - profile information.
*
@@ -126,6 +131,7 @@ struct brcmf_cfg80211_profile {
u8 bssid[ETH_ALEN];
struct brcmf_cfg80211_security sec;
struct brcmf_wsec_key key[BRCMF_MAX_DEFAULT_KEYS];
+ enum brcmf_profile_fwsup use_fwsup;
};
/**
@@ -133,16 +139,20 @@ struct brcmf_cfg80211_profile {
*
* @BRCMF_VIF_STATUS_READY: ready for operation.
* @BRCMF_VIF_STATUS_CONNECTING: connect/join in progress.
- * @BRCMF_VIF_STATUS_CONNECTED: connected/joined succesfully.
+ * @BRCMF_VIF_STATUS_CONNECTED: connected/joined successfully.
* @BRCMF_VIF_STATUS_DISCONNECTING: disconnect/disable in progress.
* @BRCMF_VIF_STATUS_AP_CREATED: AP operation started.
+ * @BRCMF_VIF_STATUS_EAP_SUCCUSS: EAPOL handshake successful.
+ * @BRCMF_VIF_STATUS_ASSOC_SUCCESS: successful SET_SSID received.
*/
enum brcmf_vif_status {
BRCMF_VIF_STATUS_READY,
BRCMF_VIF_STATUS_CONNECTING,
BRCMF_VIF_STATUS_CONNECTED,
BRCMF_VIF_STATUS_DISCONNECTING,
- BRCMF_VIF_STATUS_AP_CREATED
+ BRCMF_VIF_STATUS_AP_CREATED,
+ BRCMF_VIF_STATUS_EAP_SUCCESS,
+ BRCMF_VIF_STATUS_ASSOC_SUCCESS,
};
/**
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
index 8c7ef59944f0..d21258d277ce 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
@@ -195,6 +195,7 @@ void brcmf_feat_attach(struct brcmf_pub *drvr)
drvr->settings->feature_disable);
ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
}
+ brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");
/* set chip related quirks */
switch (drvr->bus_if->chip) {
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h
index c1dbd17506aa..1ab4f1617112 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h
@@ -32,6 +32,7 @@
* WOWL_ARP_ND: ARP and Neighbor Discovery offload support during WOWL.
* MFP: 802.11w Management Frame Protection.
* GSCAN: enhanced scan offload feature.
+ * FWSUP: Firmware supplicant.
*/
#define BRCMF_FEAT_LIST \
BRCMF_FEAT_DEF(MBSS) \
@@ -46,7 +47,8 @@
BRCMF_FEAT_DEF(WOWL_GTK) \
BRCMF_FEAT_DEF(WOWL_ARP_ND) \
BRCMF_FEAT_DEF(MFP) \
- BRCMF_FEAT_DEF(GSCAN)
+ BRCMF_FEAT_DEF(GSCAN) \
+ BRCMF_FEAT_DEF(FWSUP)
/*
* Quirks:
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h
index 5fba4b49f3b3..816f80ea925b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h
@@ -142,6 +142,16 @@ enum brcmf_fweh_event_code {
#define BRCMF_E_STATUS_CS_ABORT 15
#define BRCMF_E_STATUS_ERROR 16
+/* status field values for PSK_SUP event */
+#define BRCMF_E_STATUS_FWSUP_WAIT_M1 4
+#define BRCMF_E_STATUS_FWSUP_PREP_M2 5
+#define BRCMF_E_STATUS_FWSUP_COMPLETED 6
+#define BRCMF_E_STATUS_FWSUP_TIMEOUT 7
+#define BRCMF_E_STATUS_FWSUP_WAIT_M3 8
+#define BRCMF_E_STATUS_FWSUP_PREP_M4 9
+#define BRCMF_E_STATUS_FWSUP_WAIT_G1 10
+#define BRCMF_E_STATUS_FWSUP_PREP_G2 11
+
/* reason field values in struct brcmf_event_msg */
#define BRCMF_E_REASON_INITIAL_ASSOC 0
#define BRCMF_E_REASON_LOW_RSSI 1
@@ -161,6 +171,26 @@ enum brcmf_fweh_event_code {
#define BRCMF_E_REASON_TDLS_PEER_CONNECTED 1
#define BRCMF_E_REASON_TDLS_PEER_DISCONNECTED 2
+/* reason field values for PSK_SUP event */
+#define BRCMF_E_REASON_FWSUP_OTHER 0
+#define BRCMF_E_REASON_FWSUP_DECRYPT_KEY_DATA 1
+#define BRCMF_E_REASON_FWSUP_BAD_UCAST_WEP128 2
+#define BRCMF_E_REASON_FWSUP_BAD_UCAST_WEP40 3
+#define BRCMF_E_REASON_FWSUP_UNSUP_KEY_LEN 4
+#define BRCMF_E_REASON_FWSUP_PW_KEY_CIPHER 5
+#define BRCMF_E_REASON_FWSUP_MSG3_TOO_MANY_IE 6
+#define BRCMF_E_REASON_FWSUP_MSG3_IE_MISMATCH 7
+#define BRCMF_E_REASON_FWSUP_NO_INSTALL_FLAG 8
+#define BRCMF_E_REASON_FWSUP_MSG3_NO_GTK 9
+#define BRCMF_E_REASON_FWSUP_GRP_KEY_CIPHER 10
+#define BRCMF_E_REASON_FWSUP_GRP_MSG1_NO_GTK 11
+#define BRCMF_E_REASON_FWSUP_GTK_DECRYPT_FAIL 12
+#define BRCMF_E_REASON_FWSUP_SEND_FAIL 13
+#define BRCMF_E_REASON_FWSUP_DEAUTH 14
+#define BRCMF_E_REASON_FWSUP_WPA_PSK_TMO 15
+#define BRCMF_E_REASON_FWSUP_WPA_PSK_M1_TMO 16
+#define BRCMF_E_REASON_FWSUP_WPA_PSK_M3_TMO 17
+
/* action field values for brcmf_ifevent */
#define BRCMF_E_IF_ADD 1
#define BRCMF_E_IF_DEL 2
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h
index 3a9a76dd9222..63b1287e2e6d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h
@@ -85,6 +85,7 @@
#define BRCMF_C_SET_SCAN_PASSIVE_TIME 258
#define BRCMF_C_GET_VAR 262
#define BRCMF_C_SET_VAR 263
+#define BRCMF_C_SET_WSEC_PMK 268
s32 brcmf_fil_cmd_data_set(struct brcmf_if *ifp, u32 cmd, void *data, u32 len);
s32 brcmf_fil_cmd_data_get(struct brcmf_if *ifp, u32 cmd, void *data, u32 len);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
index b857d539b9ac..8391989b1882 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
@@ -45,6 +45,9 @@
#define BRCMF_SCAN_PARAMS_COUNT_MASK 0x0000ffff
#define BRCMF_SCAN_PARAMS_NSSID_SHIFT 16
+#define BRCMF_WSEC_MAX_PSK_LEN 32
+#define BRCMF_WSEC_PASSPHRASE BIT(0)
+
/* primary (ie tx) key */
#define BRCMF_PRIMARY_KEY (1 << 1)
#define DOT11_BSSTYPE_ANY 2
@@ -470,6 +473,19 @@ struct brcmf_wsec_key_le {
u8 ea[ETH_ALEN]; /* per station */
};
+/**
+ * struct brcmf_wsec_pmk_le - firmware pmk material.
+ *
+ * @key_len: number of octets in key material.
+ * @flags: key handling qualifiers.
+ * @key: PMK key material.
+ */
+struct brcmf_wsec_pmk_le {
+ __le16 key_len;
+ __le16 flags;
+ u8 key[2 * BRCMF_WSEC_MAX_PSK_LEN + 1];
+};
+
/* Used to get specific STA parameters */
struct brcmf_scb_val_le {
__le32 val;
--
2.19.2