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Message-Id: <20200213151909.770611835@linuxfoundation.org>
Date: Thu, 13 Feb 2020 07:20:18 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
Luca Coelho <luciano.coelho@...el.com>,
Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 5.5 022/120] iwlwifi: mvm: fix TDLS discovery with the new firmware API
From: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
commit b5b878e36c1836c0195575132cc7c199e5a34a7b upstream.
I changed the API for asking for a session protection but
I omitted the TDLS flows. Fix that now.
Note that for the TDLS flow, we need to block until the
session protection actually starts, so add this option
to iwl_mvm_schedule_session_protection.
This patch fixes a firmware assert in the TDLS flow since
the old TIME_EVENT_CMD is not supported anymore by newer
firwmare versions.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
Fixes: fe959c7b2049 ("iwlwifi: mvm: use the new session protection command")
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 2
drivers/net/wireless/intel/iwlwifi/mvm/tdls.c | 10 ++
drivers/net/wireless/intel/iwlwifi/mvm/time-event.c | 71 ++++++++++++++++----
drivers/net/wireless/intel/iwlwifi/mvm/time-event.h | 4 -
4 files changed, 72 insertions(+), 15 deletions(-)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -3293,7 +3293,7 @@ static void iwl_mvm_mac_mgd_prepare_tx(s
if (fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
iwl_mvm_schedule_session_protection(mvm, vif, 900,
- min_duration);
+ min_duration, false);
else
iwl_mvm_protect_session(mvm, vif, duration,
min_duration, 500, false);
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tdls.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tdls.c
@@ -205,9 +205,15 @@ void iwl_mvm_mac_mgd_protect_tdls_discov
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
- mutex_lock(&mvm->mutex);
/* Protect the session to hear the TDLS setup response on the channel */
- iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
+ mutex_lock(&mvm->mutex);
+ if (fw_has_capa(&mvm->fw->ucode_capa,
+ IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
+ iwl_mvm_schedule_session_protection(mvm, vif, duration,
+ duration, true);
+ else
+ iwl_mvm_protect_session(mvm, vif, duration,
+ duration, 100, true);
mutex_unlock(&mvm->mutex);
}
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
@@ -1056,13 +1056,42 @@ int iwl_mvm_schedule_csa_period(struct i
return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd);
}
+static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait,
+ struct iwl_rx_packet *pkt, void *data)
+{
+ struct iwl_mvm *mvm =
+ container_of(notif_wait, struct iwl_mvm, notif_wait);
+ struct iwl_mvm_session_prot_notif *resp;
+ int resp_len = iwl_rx_packet_payload_len(pkt);
+
+ if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF ||
+ pkt->hdr.group_id != MAC_CONF_GROUP))
+ return true;
+
+ if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
+ IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n");
+ return true;
+ }
+
+ resp = (void *)pkt->data;
+
+ if (!resp->status)
+ IWL_ERR(mvm,
+ "TIME_EVENT_NOTIFICATION received but not executed\n");
+
+ return true;
+}
+
void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
- u32 duration, u32 min_duration)
+ u32 duration, u32 min_duration,
+ bool wait_for_notif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data;
-
+ const u16 notif[] = { iwl_cmd_id(SESSION_PROTECTION_NOTIF,
+ MAC_CONF_GROUP, 0) };
+ struct iwl_notification_wait wait_notif;
struct iwl_mvm_session_prot_cmd cmd = {
.id_and_color =
cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
@@ -1071,7 +1100,6 @@ void iwl_mvm_schedule_session_protection
.conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC),
.duration_tu = cpu_to_le32(MSEC_TO_TU(duration)),
};
- int ret;
lockdep_assert_held(&mvm->mutex);
@@ -1092,14 +1120,35 @@ void iwl_mvm_schedule_session_protection
IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n",
le32_to_cpu(cmd.duration_tu));
- ret = iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(SESSION_PROTECTION_CMD,
- MAC_CONF_GROUP, 0),
- 0, sizeof(cmd), &cmd);
- if (ret) {
+ if (!wait_for_notif) {
+ if (iwl_mvm_send_cmd_pdu(mvm,
+ iwl_cmd_id(SESSION_PROTECTION_CMD,
+ MAC_CONF_GROUP, 0),
+ 0, sizeof(cmd), &cmd)) {
+ IWL_ERR(mvm,
+ "Couldn't send the SESSION_PROTECTION_CMD\n");
+ spin_lock_bh(&mvm->time_event_lock);
+ iwl_mvm_te_clear_data(mvm, te_data);
+ spin_unlock_bh(&mvm->time_event_lock);
+ }
+
+ return;
+ }
+
+ iwl_init_notification_wait(&mvm->notif_wait, &wait_notif,
+ notif, ARRAY_SIZE(notif),
+ iwl_mvm_session_prot_notif, NULL);
+
+ if (iwl_mvm_send_cmd_pdu(mvm,
+ iwl_cmd_id(SESSION_PROTECTION_CMD,
+ MAC_CONF_GROUP, 0),
+ 0, sizeof(cmd), &cmd)) {
IWL_ERR(mvm,
- "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret);
- spin_lock_bh(&mvm->time_event_lock);
- iwl_mvm_te_clear_data(mvm, te_data);
- spin_unlock_bh(&mvm->time_event_lock);
+ "Couldn't send the SESSION_PROTECTION_CMD\n");
+ iwl_remove_notification(&mvm->notif_wait, &wait_notif);
+ } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif,
+ TU_TO_JIFFIES(100))) {
+ IWL_ERR(mvm,
+ "Failed to protect session until session protection\n");
}
}
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.h
@@ -250,10 +250,12 @@ iwl_mvm_te_scheduled(struct iwl_mvm_time
* @mvm: the mvm component
* @vif: the virtual interface for which the protection issued
* @duration: the duration of the protection
+ * @wait_for_notif: if true, will block until the start of the protection
*/
void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
- u32 duration, u32 min_duration);
+ u32 duration, u32 min_duration,
+ bool wait_for_notif);
/**
* iwl_mvm_rx_session_protect_notif - handles %SESSION_PROTECTION_NOTIF
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