xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: Add TXQ scheduling API

Browse Source 
This adds an API to mac80211 to handle scheduling of TXQs and changes the
interface between driver and mac80211 for TXQ handling as follows:

- The wake_tx_queue callback interface no longer includes the TXQ. Instead,
  the driver is expected to retrieve that from ieee80211_next_txq()

- Two new mac80211 functions are added: ieee80211_next_txq() and
  ieee80211_schedule_txq(). The former returns the next TXQ that should be
  scheduled, and is how the driver gets a queue to pull packets from. The
  latter is called internally by mac80211 to start scheduling a queue, and
  the driver is supposed to call it to re-schedule the TXQ after it is
  finished pulling packets from it (unless the queue emptied).

The ath9k and ath10k drivers are changed to use the new API.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Toke Høiland-Jørgensen
2017-10-31 12:27:45 +01:00
committed by Johannes Berg
parent 9de18d8186
commit e937b8da5a
15 changed files with 174 additions and 263 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
include/net/mac80211.h
View File

@@ -105,9 +105,12 @@
* The driver is expected to initialize its private per-queue data for stations
* and interfaces in the .add_interface and .sta_add ops.
*
* The driver can't access the queue directly. To dequeue a frame, it calls
* ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it
* calls the .wake_tx_queue driver op.
* The driver can't access the queue directly. To obtain the next queue to pull
* frames from, the driver calls ieee80211_next_txq(). To dequeue a frame from a
* txq, it calls ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a
* queue, it calls the .wake_tx_queue driver op. The driver is expected to
* re-schedule the txq using ieee80211_schedule_txq() if it is still active
* after the driver has finished pulling packets from it.
*
* For AP powersave TIM handling, the driver only needs to indicate if it has
* buffered packets in the driver specific data structures by calling
@@ -3731,8 +3734,7 @@ struct ieee80211_ops {
struct ieee80211_vif *vif,
struct ieee80211_tdls_ch_sw_params *params);
void (*wake_tx_queue)(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
void (*wake_tx_queue)(struct ieee80211_hw *hw);
void (*sync_rx_queues)(struct ieee80211_hw *hw);
int (*start_nan)(struct ieee80211_hw *hw,
@@ -5883,13 +5885,36 @@ void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
* ieee80211_tx_dequeue - dequeue a packet from a software tx queue
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
* @txq: pointer obtained from ieee80211_next_txq()
*
* Returns the skb if successful, %NULL if no frame was available.
*/
struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
/**
* ieee80211_schedule_txq - add txq to scheduling loop
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
*
* Returns %true if the txq was actually added to the scheduling,
* %false otherwise.
*/
bool ieee80211_schedule_txq(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
/**
* ieee80211_next_txq - get next tx queue to pull packets from
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
*
* Returns the next txq if successful, %NULL if no queue is eligible. If a txq
* is returned, it will have been removed from the scheduler queue and needs to
* be re-scheduled with ieee80211_schedule_txq() to continue to be active.
*/
struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw);
/**
* ieee80211_txq_get_depth - get pending frame/byte count of given txq
*