iwlwifi: mvm: add low-latency framework
For various traffic use cases, we want to be able to treat multi-
channel scenarios differently. Introduce a low-latency framework
that currently only has a debugfs file to enable low-latency mode,
but can later be extended.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c b/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
index 0e29cd8..19ecade 100644
--- a/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
+++ b/drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
@@ -460,6 +460,41 @@
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
+static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
+ size_t count, loff_t *ppos)
+{
+ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+ struct iwl_mvm *mvm = mvmvif->mvm;
+ u8 value;
+ int ret;
+
+ ret = kstrtou8(buf, 0, &value);
+ if (ret)
+ return ret;
+ if (value > 1)
+ return -EINVAL;
+
+ mutex_lock(&mvm->mutex);
+ iwl_mvm_update_low_latency(mvm, vif, value);
+ mutex_unlock(&mvm->mutex);
+
+ return count;
+}
+
+static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ieee80211_vif *vif = file->private_data;
+ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+ char buf[3];
+
+ buf[0] = mvmvif->low_latency ? '1' : '0';
+ buf[1] = '\n';
+ buf[2] = '\0';
+ return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
+}
+
#define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@@ -473,6 +508,7 @@
MVM_DEBUGFS_READ_FILE_OPS(mac_params);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
+MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
@@ -505,6 +541,8 @@
MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
S_IRUSR);
+ MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
+ S_IRUSR | S_IWUSR);
if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
mvmvif == mvm->bf_allowed_vif)