From 09f1ee8cc1fc59f6795550f378e57e204698ed65 Mon Sep 17 00:00:00 2001
From: Shaul Triebitz <shaul.triebitz@intel.com>
Date: Sun, 10 Dec 2017 17:11:38 +0200
Subject: [PATCH] iwlwifi: mvm: send the low latency command
Git-commit: 09f1ee8cc1fc59f6795550f378e57e204698ed65
Patch-mainline: v4.16-rc1
References: FATE#326294
Recently a new command was added to the firmware
for setting a MAC's low-latency mode. Use it.
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../wireless/intel/iwlwifi/fw/api/mac-cfg.h | 19 +++++++++++++++
.../net/wireless/intel/iwlwifi/mvm/utils.c | 24 ++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h b/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
index ec42c84e5df2..17c7ef1662a9 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
@@ -67,6 +67,10 @@
* enum iwl_mac_conf_subcmd_ids - mac configuration command IDs
*/
enum iwl_mac_conf_subcmd_ids {
+ /**
+ * @LOW_LATENCY_CMD: &struct iwl_mac_low_latency_cmd
+ */
+ LOW_LATENCY_CMD = 0x3,
/**
* @CHANNEL_SWITCH_NOA_NOTIF: &struct iwl_channel_switch_noa_notif
*/
@@ -82,4 +86,19 @@ struct iwl_channel_switch_noa_notif {
__le32 id_and_color;
} __packed; /* CHANNEL_SWITCH_START_NTFY_API_S_VER_1 */
+/**
+ * struct iwl_mac_low_latency_cmd - set/clear mac to 'low-latency mode'
+ *
+ * @mac_id: MAC ID to whom to apply the low-latency configurations
+ * @low_latency_rx: 1/0 to set/clear Rx low latency direction
+ * @low_latency_tx: 1/0 to set/clear Tx low latency direction
+ * @reserved: reserved for alignment purposes
+ */
+struct iwl_mac_low_latency_cmd {
+ __le32 mac_id;
+ u8 low_latency_rx;
+ u8 low_latency_tx;
+ __le16 reserved;
+} __packed; /* MAC_LOW_LATENCY_API_S_VER_1 */
+
#endif /* __iwl_fw_api_mac_cfg_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index b2e9a79d4186..2fead5eb63fe 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -1032,12 +1032,34 @@ int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int res;
+ bool low_latency;
lockdep_assert_held(&mvm->mutex);
- if (iwl_mvm_vif_low_latency(mvmvif) == prev)
+ low_latency = iwl_mvm_vif_low_latency(mvmvif);
+
+ if (low_latency == prev)
return 0;
+ if (fw_has_capa(&mvm->fw->ucode_capa,
+ IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) {
+ struct iwl_mac_low_latency_cmd cmd = {
+ .mac_id = cpu_to_le32(mvmvif->id)
+ };
+
+ if (low_latency) {
+ /* currently we don't care about the direction */
+ cmd.low_latency_rx = 1;
+ cmd.low_latency_tx = 1;
+ }
+ res = iwl_mvm_send_cmd_pdu(mvm,
+ iwl_cmd_id(LOW_LATENCY_CMD,
+ MAC_CONF_GROUP, 0),
+ 0, sizeof(cmd), &cmd);
+ if (res)
+ IWL_ERR(mvm, "Failed to send low latency command\n");
+ }
+
res = iwl_mvm_update_quotas(mvm, false, NULL);
if (res)
return res;
--
2.19.2