iwlwifi: mvm: support bss dynamic alloc/dealloc of queues

"DQA" is shorthand for "dynamic queue allocation". This
enables on-demand allocation of queues per RA/TID rather than
statically allocating per vif, thus allowing a potential
benefit of various factors.

Please refer to the DOC section this patch adds to sta.h to
see a more in-depth explanation of this feature.

There are many things to take into consideration when working
in DQA mode, and this patch is only one in a series. Note that
default operation mode is non-DQA mode, unless the FW
indicates that it supports DQA mode.

This patch enables support of DQA for a station connected to
an AP, and works in a non-aggregated mode.

When a frame for an unused RA/TID arrives at the driver, it
isn't TXed immediately, but deferred first until a suitable
queue is first allocated for it, and then TXed by a worker
that both allocates the queues and TXes deferred traffic.

When a STA is removed, its queues goes back into the queue
pools for reuse as needed.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
index e6bd0c8d4cc0..8217eb25b090 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
@@ -80,12 +80,32 @@
 #include "fw-api-stats.h"
 #include "fw-api-tof.h"
 
-/* Tx queue numbers */
+/* Tx queue numbers for non-DQA mode */
 enum {
 	IWL_MVM_OFFCHANNEL_QUEUE = 8,
 	IWL_MVM_CMD_QUEUE = 9,
 };
 
+/*
+ * DQA queue numbers
+ *
+ * @IWL_MVM_DQA_MIN_MGMT_QUEUE: first TXQ in pool for MGMT and non-QOS frames.
+ *	Each MGMT queue is mapped to a single STA
+ *	MGMT frames are frames that return true on ieee80211_is_mgmt()
+ * @IWL_MVM_DQA_MAX_MGMT_QUEUE: last TXQ in pool for MGMT frames
+ * @IWL_MVM_DQA_MIN_DATA_QUEUE: first TXQ in pool for DATA frames.
+ *	DATA frames are intended for !ieee80211_is_mgmt() frames, but if
+ *	the MGMT TXQ pool is exhausted, mgmt frames can be sent on DATA queues
+ *	as well
+ * @IWL_MVM_DQA_MAX_DATA_QUEUE: last TXQ in pool for DATA frames
+ */
+enum iwl_mvm_dqa_txq {
+	IWL_MVM_DQA_MIN_MGMT_QUEUE = 5,
+	IWL_MVM_DQA_MAX_MGMT_QUEUE = 8,
+	IWL_MVM_DQA_MIN_DATA_QUEUE = 10,
+	IWL_MVM_DQA_MAX_DATA_QUEUE = 31,
+};
+
 enum iwl_mvm_tx_fifo {
 	IWL_MVM_TX_FIFO_BK = 0,
 	IWL_MVM_TX_FIFO_BE,