From 64083e2105cdade33f63cab640ebb06deb840390 Mon Sep 17 00:00:00 2001
From: Liad Kaufman <liad.kaufman@intel.com>
Date: Wed, 5 Apr 2017 16:25:11 +0300
Subject: [PATCH 069/146] iwlwifi: mvm: support aggregations on A000 HW
Git-commit: dd32162da4e5b3c9c81adf9a1f6e3a839a35d5f0
Patch-mainline: v4.13-rc1
References: FATE#322675
On A000 HW, the SCD rdptr has only 8 bits allocated
for it, thus when checking if a queue is full, or
when checking if the SSN is equal to the TID's
next_reclaimed, A000 HW should trim the SSN.
Fix this by "normalizing" the SSN to wrap around
0xFF when comparing to the next_reclaimed on A000
HW.
Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 2 +-
drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 2 +-
drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 27 +++++++++++++++++++++--
drivers/net/wireless/intel/iwlwifi/mvm/sta.h | 8 ++-----
drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 15 ++++++++++---
drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 2 +-
6 files changed, 42 insertions(+), 14 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index c6109ba030b7..d04a88c6c593 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -2413,7 +2413,7 @@ static void __iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
__set_bit(tid_data->txq_id, &txqs);
- if (iwl_mvm_tid_queued(tid_data) == 0)
+ if (iwl_mvm_tid_queued(mvm, tid_data) == 0)
continue;
__set_bit(tid, &tids);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 07d5bcec7051..64d63a5f8fad 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -1327,7 +1327,7 @@ static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
* for offloading in order to prevent reuse of the same
* qos seq counters.
*/
- if (iwl_mvm_tid_queued(tid_data))
+ if (iwl_mvm_tid_queued(mvm, tid_data))
continue;
if (tid_data->state != IWL_AGG_OFF)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 4443aa78c8f1..26c251e232fe 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -2555,6 +2555,7 @@ int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data;
+ u16 normalized_ssn;
int txq_id;
int ret;
@@ -2642,7 +2643,15 @@ int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
mvmsta->sta_id, tid, txq_id, tid_data->ssn,
tid_data->next_reclaimed);
- if (tid_data->ssn == tid_data->next_reclaimed) {
+ /*
+ * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
+ * to align the wrap around of ssn so we compare relevant values.
+ */
+ normalized_ssn = tid_data->ssn;
+ if (mvm->trans->cfg->gen2)
+ normalized_ssn &= 0xff;
+
+ if (normalized_ssn == tid_data->next_reclaimed) {
tid_data->state = IWL_AGG_STARTING;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
@@ -3566,7 +3575,7 @@ void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
return;
}
- n_queued = iwl_mvm_tid_queued(tid_data);
+ n_queued = iwl_mvm_tid_queued(mvm, tid_data);
if (n_queued > remaining) {
more_data = true;
remaining = 0;
@@ -3748,3 +3757,17 @@ void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
rcu_read_unlock();
}
+
+u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
+{
+ u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
+
+ /*
+ * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
+ * to align the wrap around of ssn so we compare relevant values.
+ */
+ if (mvm->trans->cfg->gen2)
+ sn &= 0xff;
+
+ return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
index 357ff2bf75c1..05fecbe87da4 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
@@ -341,12 +341,6 @@ struct iwl_mvm_tid_data {
bool is_tid_active;
};
-static inline u16 iwl_mvm_tid_queued(struct iwl_mvm_tid_data *tid_data)
-{
- return ieee80211_sn_sub(IEEE80211_SEQ_TO_SN(tid_data->seq_number),
- tid_data->next_reclaimed);
-}
-
struct iwl_mvm_key_pn {
struct rcu_head rcu_head;
struct {
@@ -447,6 +441,8 @@ struct iwl_mvm_sta {
u8 avg_energy;
};
+u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data);
+
static inline struct iwl_mvm_sta *
iwl_mvm_sta_from_mac80211(struct ieee80211_sta *sta)
{
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 9e0bb316c526..ae185fe7f0c5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1132,13 +1132,14 @@ static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
struct ieee80211_vif *vif = mvmsta->vif;
+ u16 normalized_ssn;
lockdep_assert_held(&mvmsta->lock);
if ((tid_data->state == IWL_AGG_ON ||
tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
iwl_mvm_is_dqa_supported(mvm)) &&
- iwl_mvm_tid_queued(tid_data) == 0) {
+ iwl_mvm_tid_queued(mvm, tid_data) == 0) {
/*
* Now that this aggregation or DQA queue is empty tell
* mac80211 so it knows we no longer have frames buffered for
@@ -1147,7 +1148,15 @@ static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
ieee80211_sta_set_buffered(sta, tid, false);
}
- if (tid_data->ssn != tid_data->next_reclaimed)
+ /*
+ * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
+ * to align the wrap around of ssn so we compare relevant values.
+ */
+ normalized_ssn = tid_data->ssn;
+ if (mvm->trans->cfg->gen2)
+ normalized_ssn &= 0xff;
+
+ if (normalized_ssn != tid_data->next_reclaimed)
return;
switch (tid_data->state) {
@@ -1491,7 +1500,7 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
if (mvmsta->sleep_tx_count) {
mvmsta->sleep_tx_count--;
if (mvmsta->sleep_tx_count &&
- !iwl_mvm_tid_queued(tid_data)) {
+ !iwl_mvm_tid_queued(mvm, tid_data)) {
/*
* The number of frames in the queue
* dropped to 0 even if we sent less
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index 514ed4030dae..264b270012a5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -1187,7 +1187,7 @@ static void iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
/* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
/* If some TFDs are still queued - don't mark TID as inactive */
- if (iwl_mvm_tid_queued(&mvmsta->tid_data[tid]))
+ if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
tid_bitmap &= ~BIT(tid);
}
--
2.12.3