74 lines
2 KiB
Diff
74 lines
2 KiB
Diff
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From: Michal Kazior <michal.kazior@tieto.com>
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Date: Tue, 17 May 2016 14:47:01 +0200
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Subject: [PATCH] ath10k: disable wake_tx_queue for older devices
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Some setups suffer performance regressions with
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current wake_tx_queue implementation.
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Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
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---
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--- a/drivers/net/wireless/ath/ath10k/core.h
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+++ b/drivers/net/wireless/ath/ath10k/core.h
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@@ -667,6 +667,7 @@ struct ath10k_fw_components {
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struct ath10k {
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struct ath_common ath_common;
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struct ieee80211_hw *hw;
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+ struct ieee80211_ops *ops;
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struct device *dev;
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u8 mac_addr[ETH_ALEN];
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--- a/drivers/net/wireless/ath/ath10k/mac.c
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+++ b/drivers/net/wireless/ath/ath10k/mac.c
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@@ -7497,21 +7497,32 @@ static const struct ieee80211_channel at
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struct ath10k *ath10k_mac_create(size_t priv_size)
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{
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struct ieee80211_hw *hw;
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+ struct ieee80211_ops *ops;
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struct ath10k *ar;
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- hw = ieee80211_alloc_hw(sizeof(struct ath10k) + priv_size, &ath10k_ops);
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- if (!hw)
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+ ops = kmemdup(&ath10k_ops, sizeof(ath10k_ops), GFP_KERNEL);
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+ if (!ops)
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+ return NULL;
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+
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+ hw = ieee80211_alloc_hw(sizeof(struct ath10k) + priv_size, ops);
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+ if (!hw) {
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+ kfree(ops);
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return NULL;
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+ }
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ar = hw->priv;
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ar->hw = hw;
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+ ar->ops = ops;
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return ar;
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}
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void ath10k_mac_destroy(struct ath10k *ar)
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{
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+ struct ieee80211_ops *ops = ar->ops;
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+
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ieee80211_free_hw(ar->hw);
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+ kfree(ops);
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}
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static const struct ieee80211_iface_limit ath10k_if_limits[] = {
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@@ -7945,6 +7956,15 @@ int ath10k_mac_register(struct ath10k *a
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ath10k_warn(ar, "failed to initialise DFS pattern detector\n");
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}
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+ /* Current wake_tx_queue implementation imposes a significant
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+ * performance penalty in some setups. The tx scheduling code needs
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+ * more work anyway so disable the wake_tx_queue unless firmware
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+ * supports the pull-push mechanism.
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+ */
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+ if (!test_bit(ATH10K_FW_FEATURE_PEER_FLOW_CONTROL,
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+ ar->running_fw->fw_file.fw_features))
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+ ar->ops->wake_tx_queue = NULL;
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+
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ret = ath_regd_init(&ar->ath_common.regulatory, ar->hw->wiphy,
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ath10k_reg_notifier);
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if (ret) {
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