iwlwifi: mvm: rs: add ops for the new rate scaling in the FW

This patch introduces a new instance of rate_control_ops for
the new API (adding only empty stubs here and the subsequent
patches in the series will fill in the implementation).
The decision which API to use is done during the register
step according to FW TLV.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 49 insertions, 40 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 739c47dbc6e8..3dd6535ed922 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -42,8 +42,6 @@
 #include "mvm.h"
 #include "debugfs.h"
 
-#define RS_NAME "iwl-mvm-rs"
-
 #define IWL_RATE_MAX_WINDOW		62	/* # tx in history window */
 
 /* Calculations of success ratio are done in fixed point where 12800 is 100%.
@@ -1416,13 +1414,13 @@ done:
 /*
  * mac80211 sends us Tx status
  */
-static void rs_mac80211_tx_status(void *mvm_r,
-				  struct ieee80211_supported_band *sband,
-				  struct ieee80211_sta *sta, void *priv_sta,
-				  struct sk_buff *skb)
+static void rs_drv_mac80211_tx_status(void *mvm_r,
+				      struct ieee80211_supported_band *sband,
+				      struct ieee80211_sta *sta, void *priv_sta,
+				      struct sk_buff *skb)
 {
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r;
+	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
@@ -2857,8 +2855,9 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
 	iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
 }
 
-static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
-			struct ieee80211_tx_rate_control *txrc)
+static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
+			    void *mvm_sta,
+			    struct ieee80211_tx_rate_control *txrc)
 {
 	struct iwl_op_mode *op_mode = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -2900,8 +2899,8 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
 	}
 }
 
-static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
-			  gfp_t gfp)
+static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
+			      gfp_t gfp)
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
@@ -3037,7 +3036,7 @@ static void rs_vht_init(struct iwl_mvm *mvm,
 }
 
 #ifdef CONFIG_IWLWIFI_DEBUGFS
-static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
+void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
 {
 	spin_lock_bh(&mvm->drv_stats_lock);
 	memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
@@ -3105,8 +3104,8 @@ void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
 /*
  * Called after adding a new station to initialize rate scaling
  */
-void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
-			  enum nl80211_band band, bool init)
+static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			     enum nl80211_band band, bool init)
 {
 	int i, j;
 	struct ieee80211_hw *hw = mvm->hw;
@@ -3188,16 +3187,15 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	rs_initialize_lq(mvm, sta, lq_sta, band, init);
 }
 
-static void rs_rate_update(void *mvm_r,
-			   struct ieee80211_supported_band *sband,
-			   struct cfg80211_chan_def *chandef,
-			   struct ieee80211_sta *sta, void *priv_sta,
-			   u32 changed)
+static void rs_drv_rate_update(void *mvm_r,
+			       struct ieee80211_supported_band *sband,
+			       struct cfg80211_chan_def *chandef,
+			       struct ieee80211_sta *sta,
+			       void *priv_sta, u32 changed)
 {
+	struct iwl_op_mode *op_mode = mvm_r;
+	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
 	u8 tid;
-	struct iwl_op_mode *op_mode  =
-			(struct iwl_op_mode *)mvm_r;
-	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 
 	if (!iwl_mvm_sta_from_mac80211(sta)->vif)
 		return;
@@ -3564,14 +3562,14 @@ static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
 {
 	return hw->priv;
 }
+
 /* rate scale requires free function to be implemented */
 static void rs_free(void *mvm_rate)
 {
 	return;
 }
 
-static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
-			void *mvm_sta)
+static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
 {
 	struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
 	struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
@@ -3982,7 +3980,8 @@ static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
 
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
 
-static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir)
+static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
+				   struct dentry *dir)
 {
 	struct iwl_lq_sta *lq_sta = priv_sta;
 	struct iwl_mvm_sta *mvmsta;
@@ -4009,7 +4008,7 @@ err:
 	IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
 }
 
-static void rs_remove_debugfs(void *mvm, void *mvm_sta)
+void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
 {
 }
 #endif
@@ -4019,37 +4018,47 @@ static void rs_remove_debugfs(void *mvm, void *mvm_sta)
  * the station is added. Since mac80211 calls this function before a
  * station is added we ignore it.
  */
-static void rs_rate_init_stub(void *mvm_r,
-			      struct ieee80211_supported_band *sband,
-			      struct cfg80211_chan_def *chandef,
-			      struct ieee80211_sta *sta, void *mvm_sta)
+static void rs_rate_init_ops(void *mvm_r,
+			     struct ieee80211_supported_band *sband,
+			     struct cfg80211_chan_def *chandef,
+			     struct ieee80211_sta *sta, void *mvm_sta)
 {
 }
 
-static const struct rate_control_ops rs_mvm_ops = {
+/* ops for rate scaling implemented in the driver */
+static const struct rate_control_ops rs_mvm_ops_drv = {
 	.name = RS_NAME,
-	.tx_status = rs_mac80211_tx_status,
-	.get_rate = rs_get_rate,
-	.rate_init = rs_rate_init_stub,
+	.tx_status = rs_drv_mac80211_tx_status,
+	.get_rate = rs_drv_get_rate,
+	.rate_init = rs_rate_init_ops,
 	.alloc = rs_alloc,
 	.free = rs_free,
-	.alloc_sta = rs_alloc_sta,
+	.alloc_sta = rs_drv_alloc_sta,
 	.free_sta = rs_free_sta,
-	.rate_update = rs_rate_update,
+	.rate_update = rs_drv_rate_update,
 #ifdef CONFIG_MAC80211_DEBUGFS
-	.add_sta_debugfs = rs_add_debugfs,
-	.remove_sta_debugfs = rs_remove_debugfs,
+	.add_sta_debugfs = rs_drv_add_sta_debugfs,
+	.remove_sta_debugfs = rs_remove_sta_debugfs,
 #endif
 };
 
+void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
+			  enum nl80211_band band, bool init)
+{
+	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TLC_OFFLOAD))
+		rs_fw_rate_init(mvm, sta, band);
+	else
+		rs_drv_rate_init(mvm, sta, band, init);
+}
+
 int iwl_mvm_rate_control_register(void)
 {
-	return ieee80211_rate_control_register(&rs_mvm_ops);
+	return ieee80211_rate_control_register(&rs_mvm_ops_drv);
 }
 
 void iwl_mvm_rate_control_unregister(void)
 {
-	ieee80211_rate_control_unregister(&rs_mvm_ops);
+	ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
 }
 
 /**