diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/380-mac80211-introduce-aql_enable-node-in-debugfs.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/380-mac80211-introduce-aql_enable-node-in-debugfs.patch | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/380-mac80211-introduce-aql_enable-node-in-debugfs.patch b/package/kernel/mac80211/patches/subsys/380-mac80211-introduce-aql_enable-node-in-debugfs.patch new file mode 100644 index 0000000000..b21b671c10 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/380-mac80211-introduce-aql_enable-node-in-debugfs.patch @@ -0,0 +1,111 @@ +From: Lorenzo Bianconi <lorenzo@kernel.org> +Date: Sat, 9 Jan 2021 18:57:51 +0100 +Subject: [PATCH] mac80211: introduce aql_enable node in debugfs + +Introduce aql_enable node in debugfs in order to enable/disable aql. +This is useful for debugging purpose. + +Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> +Link: https://lore.kernel.org/r/e7a934d5d84e4796c4f97ea5de4e66c824296b07.1610214851.git.lorenzo@kernel.org +Signed-off-by: Johannes Berg <johannes.berg@intel.com> +--- + +--- a/net/mac80211/debugfs.c ++++ b/net/mac80211/debugfs.c +@@ -281,6 +281,56 @@ static const struct file_operations aql_ + .llseek = default_llseek, + }; + ++static ssize_t aql_enable_read(struct file *file, char __user *user_buf, ++ size_t count, loff_t *ppos) ++{ ++ char buf[3]; ++ int len; ++ ++ len = scnprintf(buf, sizeof(buf), "%d\n", ++ !static_key_false(&aql_disable.key)); ++ ++ return simple_read_from_buffer(user_buf, count, ppos, buf, len); ++} ++ ++static ssize_t aql_enable_write(struct file *file, const char __user *user_buf, ++ size_t count, loff_t *ppos) ++{ ++ bool aql_disabled = static_key_false(&aql_disable.key); ++ char buf[3]; ++ size_t len; ++ ++ if (count > sizeof(buf)) ++ return -EINVAL; ++ ++ if (copy_from_user(buf, user_buf, count)) ++ return -EFAULT; ++ ++ buf[sizeof(buf) - 1] = '\0'; ++ len = strlen(buf); ++ if (len > 0 && buf[len - 1] == '\n') ++ buf[len - 1] = 0; ++ ++ if (buf[0] == '0' && buf[1] == '\0') { ++ if (!aql_disabled) ++ static_branch_inc(&aql_disable); ++ } else if (buf[0] == '1' && buf[1] == '\0') { ++ if (aql_disabled) ++ static_branch_dec(&aql_disable); ++ } else { ++ return -EINVAL; ++ } ++ ++ return count; ++} ++ ++static const struct file_operations aql_enable_ops = { ++ .write = aql_enable_write, ++ .read = aql_enable_read, ++ .open = simple_open, ++ .llseek = default_llseek, ++}; ++ + static ssize_t force_tx_status_read(struct file *file, + char __user *user_buf, + size_t count, +@@ -569,6 +619,7 @@ void debugfs_hw_add(struct ieee80211_loc + DEBUGFS_ADD(power); + DEBUGFS_ADD(hw_conf); + DEBUGFS_ADD_MODE(force_tx_status, 0600); ++ DEBUGFS_ADD_MODE(aql_enable, 0600); + + if (local->ops->wake_tx_queue) + DEBUGFS_ADD_MODE(aqm, 0600); +--- a/net/mac80211/ieee80211_i.h ++++ b/net/mac80211/ieee80211_i.h +@@ -1140,6 +1140,8 @@ enum mac80211_scan_state { + SCAN_ABORT, + }; + ++DECLARE_STATIC_KEY_FALSE(aql_disable); ++ + struct ieee80211_local { + /* embed the driver visible part. + * don't cast (use the static inlines below), but we keep +--- a/net/mac80211/tx.c ++++ b/net/mac80211/tx.c +@@ -3887,6 +3887,8 @@ void __ieee80211_schedule_txq(struct iee + } + EXPORT_SYMBOL(__ieee80211_schedule_txq); + ++DEFINE_STATIC_KEY_FALSE(aql_disable); ++ + bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw, + struct ieee80211_txq *txq) + { +@@ -3896,6 +3898,9 @@ bool ieee80211_txq_airtime_check(struct + if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) + return true; + ++ if (static_branch_unlikely(&aql_disable)) ++ return true; ++ + if (!txq->sta) + return true; + |