[linux-yocto] [linux-yocto-4.12][PATCH 3/6] iwlwifi: add wait for tx queue empty
Liwei Song
liwei.song at windriver.com
Mon Nov 13 17:14:40 PST 2017
From: Sara Sharon <sara.sharon at intel.com>
commit d6d517b7730c2dada199db83ebbc670c50fa9952 upstream.
Now that we have 512 queues, add a wait for single TX
queue to gen2.
This replaces gen1 wait_tx_queues_empty, which was limited
to 32 queues.
Signed-off-by: Sara Sharon <sara.sharon at intel.com>
Signed-off-by: Luca Coelho <luciano.coelho at intel.com>
Signed-off-by: Liwei Song <liwei.song at windriver.com>
---
drivers/net/wireless/intel/iwlwifi/iwl-trans.c | 2 +
drivers/net/wireless/intel/iwlwifi/iwl-trans.h | 20 ++++++-
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 4 +-
drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 41 ++++++++++++-
drivers/net/wireless/intel/iwlwifi/mvm/sta.h | 2 +
drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 72 ++++++++++++++---------
6 files changed, 107 insertions(+), 34 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.c b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
index 0bde26bab15d..c0871f8f2c68 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
@@ -102,6 +102,8 @@ struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
if (!trans->dev_cmd_pool)
return NULL;
+ WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
+
return trans;
}
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index 0ebfdbb22992..d3a78a11821a 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -619,7 +619,8 @@ struct iwl_tx_queue_cfg_rsp {
* @txq_disable: de-configure a Tx queue to send AMPDUs
* Must be atomic
* @txq_set_shared_mode: change Tx queue shared/unshared marking
- * @wait_tx_queue_empty: wait until tx queues are empty. May sleep.
+ * @wait_tx_queues_empty: wait until tx queues are empty. May sleep.
+ * @wait_txq_empty: wait until specific tx queue is empty. May sleep.
* @freeze_txq_timer: prevents the timer of the queue from firing until the
* queue is set to awake. Must be atomic.
* @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note
@@ -692,6 +693,7 @@ struct iwl_trans_ops {
bool shared);
int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm);
+ int (*wait_txq_empty)(struct iwl_trans *trans, int queue);
void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
bool freeze);
void (*block_txq_ptrs)(struct iwl_trans *trans, bool block);
@@ -1198,6 +1200,9 @@ static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans,
static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans,
u32 txqs)
{
+ if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty))
+ return -ENOTSUPP;
+
if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return -EIO;
@@ -1206,6 +1211,19 @@ static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans,
return trans->ops->wait_tx_queues_empty(trans, txqs);
}
+static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue)
+{
+ if (WARN_ON_ONCE(!trans->ops->wait_txq_empty))
+ return -ENOTSUPP;
+
+ if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
+ IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
+ return -EIO;
+ }
+
+ return trans->ops->wait_txq_empty(trans, queue);
+}
+
static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
{
trans->ops->write8(trans, ofs, val);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index bfd1eea9e748..95763ccb365f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4013,6 +4013,8 @@ static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
IWL_ERR(mvm, "flush request fail\n");
} else {
msk |= mvmsta->tfd_queue_msk;
+ if (iwl_mvm_has_new_tx_api(mvm))
+ iwl_mvm_wait_sta_queues_empty(mvm, mvmsta);
}
}
@@ -4021,7 +4023,7 @@ static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
/* this can take a while, and we may need/want other operations
* to succeed while doing this, so do it without the mutex held
*/
- if (!drop)
+ if (!drop && !iwl_mvm_has_new_tx_api(mvm))
iwl_trans_wait_tx_queues_empty(mvm->trans, msk);
}
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 3695d99d0c92..bc52739eeb25 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1590,6 +1590,29 @@ static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
}
}
+int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
+ struct iwl_mvm_sta *mvm_sta)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
+ u16 txq_id;
+
+ spin_lock_bh(&mvm_sta->lock);
+ txq_id = mvm_sta->tid_data[i].txq_id;
+ spin_unlock_bh(&mvm_sta->lock);
+
+ if (txq_id == IWL_MVM_INVALID_QUEUE)
+ continue;
+
+ ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
@@ -1614,8 +1637,14 @@ int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
if (ret)
return ret;
- ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
- mvm_sta->tfd_queue_msk);
+ if (iwl_mvm_has_new_tx_api(mvm)) {
+ ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
+ } else {
+ u32 q_mask = mvm_sta->tfd_queue_msk;
+
+ ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
+ q_mask);
+ }
if (ret)
return ret;
ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
@@ -2861,7 +2890,13 @@ int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
iwl_mvm_drain_sta(mvm, mvmsta, true);
if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
- iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
+
+ if (iwl_mvm_has_new_tx_api(mvm))
+ iwl_trans_wait_txq_empty(mvm->trans, txq_id);
+
+ else
+ iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
+
iwl_mvm_drain_sta(mvm, mvmsta, false);
iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
index ad62b67dceb2..357ff2bf75c1 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h
@@ -489,6 +489,8 @@ static inline int iwl_mvm_update_sta(struct iwl_mvm *mvm,
return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
}
+int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
+ struct iwl_mvm_sta *mvm_sta);
int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 93cbc7a69bcd..d6477a1e8eb3 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -2045,17 +2045,52 @@ void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
}
-static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
+static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_txq *txq;
- int cnt;
unsigned long now = jiffies;
+ u8 wr_ptr;
+
+ if (!test_bit(txq_idx, trans_pcie->queue_used))
+ return -EINVAL;
+
+ IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
+ txq = trans_pcie->txq[txq_idx];
+ wr_ptr = ACCESS_ONCE(txq->write_ptr);
+
+ while (txq->read_ptr != ACCESS_ONCE(txq->write_ptr) &&
+ !time_after(jiffies,
+ now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
+ u8 write_ptr = ACCESS_ONCE(txq->write_ptr);
+
+ if (WARN_ONCE(wr_ptr != write_ptr,
+ "WR pointer moved while flushing %d -> %d\n",
+ wr_ptr, write_ptr))
+ return -ETIMEDOUT;
+ usleep_range(1000, 2000);
+ }
+
+ if (txq->read_ptr != txq->write_ptr) {
+ IWL_ERR(trans,
+ "fail to flush all tx fifo queues Q %d\n", txq_idx);
+ iwl_trans_pcie_log_scd_error(trans, txq);
+ return -ETIMEDOUT;
+ }
+
+ IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
+
+ return 0;
+}
+
+static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
+{
+ struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ int cnt;
int ret = 0;
/* waiting for all the tx frames complete might take a while */
for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
- u8 wr_ptr;
if (cnt == trans_pcie->cmd_queue)
continue;
@@ -2064,34 +2099,11 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
if (!(BIT(cnt) & txq_bm))
continue;
- IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt);
- txq = trans_pcie->txq[cnt];
- wr_ptr = ACCESS_ONCE(txq->write_ptr);
-
- while (txq->read_ptr != ACCESS_ONCE(txq->write_ptr) &&
- !time_after(jiffies,
- now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
- u8 write_ptr = ACCESS_ONCE(txq->write_ptr);
-
- if (WARN_ONCE(wr_ptr != write_ptr,
- "WR pointer moved while flushing %d -> %d\n",
- wr_ptr, write_ptr))
- return -ETIMEDOUT;
- usleep_range(1000, 2000);
- }
-
- if (txq->read_ptr != txq->write_ptr) {
- IWL_ERR(trans,
- "fail to flush all tx fifo queues Q %d\n", cnt);
- ret = -ETIMEDOUT;
+ ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
+ if (ret)
break;
- }
- IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
}
- if (ret)
- iwl_trans_pcie_log_scd_error(trans, txq);
-
return ret;
}
@@ -2835,7 +2847,6 @@ static void iwl_trans_pcie_resume(struct iwl_trans *trans)
.ref = iwl_trans_pcie_ref, \
.unref = iwl_trans_pcie_unref, \
.dump_data = iwl_trans_pcie_dump_data, \
- .wait_tx_queues_empty = iwl_trans_pcie_wait_txq_empty, \
.d3_suspend = iwl_trans_pcie_d3_suspend, \
.d3_resume = iwl_trans_pcie_d3_resume
@@ -2865,6 +2876,8 @@ static const struct iwl_trans_ops trans_ops_pcie = {
.txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
+ .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
+
.freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
.block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
};
@@ -2884,6 +2897,7 @@ static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
.txq_alloc = iwl_trans_pcie_dyn_txq_alloc,
.txq_free = iwl_trans_pcie_dyn_txq_free,
+ .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
};
struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
--
2.7.4
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