[source] ath10k: fix tx performance regression on older chipsets

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=76d09dcb015963e2d024e30acc2c9f0c2bca9f5f

commit 76d09dcb015963e2d024e30acc2c9f0c2bca9f5f
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Jun 29 11:01:16 2016 +0200

    ath10k: fix tx performance regression on older chipsets
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 ...k-disable-wake_tx_queue-for-older-devices.patch | 73 ++++++++++++++++++++++
 .../patches/930-ath10k_add_tpt_led_trigger.patch   |  4 +-
 2 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/package/kernel/mac80211/patches/311-ath10k-disable-wake_tx_queue-for-older-devices.patch b/package/kernel/mac80211/patches/311-ath10k-disable-wake_tx_queue-for-older-devices.patch
new file mode 100644
index 0000000..4cf26a6
--- /dev/null
+++ b/package/kernel/mac80211/patches/311-ath10k-disable-wake_tx_queue-for-older-devices.patch
@@ -0,0 +1,73 @@
+From: Michal Kazior <michal.kazior at tieto.com>
+Date: Tue, 17 May 2016 14:47:01 +0200
+Subject: [PATCH] ath10k: disable wake_tx_queue for older devices
+
+Some setups suffer performance regressions with
+current wake_tx_queue implementation.
+
+Signed-off-by: Michal Kazior <michal.kazior at tieto.com>
+---
+
+--- a/drivers/net/wireless/ath/ath10k/core.h
++++ b/drivers/net/wireless/ath/ath10k/core.h
+@@ -667,6 +667,7 @@ struct ath10k_fw_components {
+ struct ath10k {
+ 	struct ath_common ath_common;
+ 	struct ieee80211_hw *hw;
++	struct ieee80211_ops *ops;
+ 	struct device *dev;
+ 	u8 mac_addr[ETH_ALEN];
+ 
+--- a/drivers/net/wireless/ath/ath10k/mac.c
++++ b/drivers/net/wireless/ath/ath10k/mac.c
+@@ -7497,21 +7497,32 @@ static const struct ieee80211_channel at
+ struct ath10k *ath10k_mac_create(size_t priv_size)
+ {
+ 	struct ieee80211_hw *hw;
++	struct ieee80211_ops *ops;
+ 	struct ath10k *ar;
+ 
+-	hw = ieee80211_alloc_hw(sizeof(struct ath10k) + priv_size, &ath10k_ops);
+-	if (!hw)
++	ops = kmemdup(&ath10k_ops, sizeof(ath10k_ops), GFP_KERNEL);
++	if (!ops)
++		return NULL;
++
++	hw = ieee80211_alloc_hw(sizeof(struct ath10k) + priv_size, ops);
++	if (!hw) {
++		kfree(ops);
+ 		return NULL;
++	}
+ 
+ 	ar = hw->priv;
+ 	ar->hw = hw;
++	ar->ops = ops;
+ 
+ 	return ar;
+ }
+ 
+ void ath10k_mac_destroy(struct ath10k *ar)
+ {
++	struct ieee80211_ops *ops = ar->ops;
++
+ 	ieee80211_free_hw(ar->hw);
++	kfree(ops);
+ }
+ 
+ static const struct ieee80211_iface_limit ath10k_if_limits[] = {
+@@ -7945,6 +7956,15 @@ int ath10k_mac_register(struct ath10k *a
+ 			ath10k_warn(ar, "failed to initialise DFS pattern detector\n");
+ 	}
+ 
++	/* Current wake_tx_queue implementation imposes a significant
++	 * performance penalty in some setups. The tx scheduling code needs
++	 * more work anyway so disable the wake_tx_queue unless firmware
++	 * supports the pull-push mechanism.
++	 */
++	if (!test_bit(ATH10K_FW_FEATURE_PEER_FLOW_CONTROL,
++		      ar->running_fw->fw_file.fw_features))
++		ar->ops->wake_tx_queue = NULL;
++
+ 	ret = ath_regd_init(&ar->ath_common.regulatory, ar->hw->wiphy,
+ 			    ath10k_reg_notifier);
+ 	if (ret) {
diff --git a/package/kernel/mac80211/patches/930-ath10k_add_tpt_led_trigger.patch b/package/kernel/mac80211/patches/930-ath10k_add_tpt_led_trigger.patch
index 3795f75..83ca029 100644
--- a/package/kernel/mac80211/patches/930-ath10k_add_tpt_led_trigger.patch
+++ b/package/kernel/mac80211/patches/930-ath10k_add_tpt_led_trigger.patch
@@ -1,6 +1,6 @@
 --- a/drivers/net/wireless/ath/ath10k/mac.c
 +++ b/drivers/net/wireless/ath/ath10k/mac.c
-@@ -7731,6 +7731,21 @@ struct ath10k_vif *ath10k_get_arvif(stru
+@@ -7742,6 +7742,21 @@ struct ath10k_vif *ath10k_get_arvif(stru
  	return arvif_iter.arvif;
  }
  
@@ -22,7 +22,7 @@
  int ath10k_mac_register(struct ath10k *ar)
  {
  	static const u32 cipher_suites[] = {
-@@ -7955,6 +7970,12 @@ int ath10k_mac_register(struct ath10k *a
+@@ -7975,6 +7990,12 @@ int ath10k_mac_register(struct ath10k *a
  	ar->hw->wiphy->cipher_suites = cipher_suites;
  	ar->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);