iwlwifi: trans: allow skipping scheduler hardware config

In a later patch, the hardware configuration will be moved to
firmware. Prepare for this by allowing hardware configuration
in the transport to be skipped by not passing a configuration
on enable and passing configure_scd=false on disable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 35 insertions, 12 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index c198dde..dd3aefc 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -444,7 +444,9 @@ struct iwl_trans_txq_scd_cfg {
  *	Must be atomic
  * @txq_enable: setup a queue. To setup an AC queue, use the
  *	iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
- *	this one. The op_mode must not configure the HCMD queue. May sleep.
+ *	this one. The op_mode must not configure the HCMD queue. The scheduler
+ *	configuration may be %NULL, in which case the hardware will not be
+ *	configured. May sleep.
  * @txq_disable: de-configure a Tx queue to send AMPDUs
  *	Must be atomic
  * @wait_tx_queue_empty: wait until tx queues are empty. May sleep.
@@ -501,7 +503,8 @@ struct iwl_trans_ops {
 
 	void (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
 			   const struct iwl_trans_txq_scd_cfg *cfg);
-	void (*txq_disable)(struct iwl_trans *trans, int queue);
+	void (*txq_disable)(struct iwl_trans *trans, int queue,
+			    bool configure_scd);
 
 	int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
 	int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm);
@@ -773,9 +776,22 @@ static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
 	trans->ops->reclaim(trans, queue, ssn, skbs);
 }
 
-static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
+static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
+					 bool configure_scd)
 {
-	trans->ops->txq_disable(trans, queue);
+	trans->ops->txq_disable(trans, queue, configure_scd);
+}
+
+static inline void
+iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
+			 const struct iwl_trans_txq_scd_cfg *cfg)
+{
+	might_sleep();
+
+	if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
+		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
+
+	trans->ops->txq_enable(trans, queue, ssn, cfg);
 }
 
 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
@@ -789,19 +805,26 @@ static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
 		.frame_limit = frame_limit,
 	};
 
-	might_sleep();
-
-	if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
-		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
-
-	trans->ops->txq_enable(trans, queue, ssn, &cfg);
+	iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg);
 }
 
 static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
 					   int fifo)
 {
-	iwl_trans_txq_enable(trans, queue, fifo, -1,
-			     IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
+	struct iwl_trans_txq_scd_cfg cfg = {
+		.fifo = fifo,
+		.sta_id = -1,
+		.tid = IWL_MAX_TID_COUNT,
+		.frame_limit = IWL_FRAME_LIMIT,
+	};
+
+	iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg);
+}
+
+static inline void
+iwl_trans_txq_enable_no_scd(struct iwl_trans *trans, int queue, u16 ssn)
+{
+	iwl_trans_txq_enable_cfg(trans, queue, ssn, NULL);
 }
 
 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans,