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iwlwifi: mvm: remove per-queue hw refcount

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There's no need to have a hw refcount if we just mark the
command queue with a (fake) TID; at that point, the refcount
becomes equivalent to the hweight() of the TID bitmap.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2018-07-04 11:58:28 +02:00 • committed by Luca Coelho
parent 99448a8c11
commit 1c14089e37
4 changed files with 28 additions and 25 deletions
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9
drivers/net/wireless/intel/iwlwifi/mvm/fw.c
View file

@ -364,7 +364,14 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
*/
memset(&mvm->queue_info, 0, sizeof(mvm->queue_info));
mvm->queue_info[IWL_MVM_DQA_CMD_QUEUE].hw_queue_refcount = 1;
/*
* Set a 'fake' TID for the command queue, since we use the
* hweight() of the tid_bitmap as a refcount now. Not that
* we ever even consider the command queue as one we might
* want to reuse, but be safe nevertheless.
*/
mvm->queue_info[IWL_MVM_DQA_CMD_QUEUE].tid_bitmap =
BIT(IWL_MAX_TID_COUNT + 2);
for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
atomic_set(&mvm->mac80211_queue_stop_count[i], 0);

1
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View file

@ -789,7 +789,6 @@ struct iwl_mvm_geo_profile {
};
struct iwl_mvm_dqa_txq_info {
u8 hw_queue_refcount;
u8 ra_sta_id; /* The RA this queue is mapped to, if exists */
bool reserved; /* Is this the TXQ reserved for a STA */
u8 mac80211_ac; /* The mac80211 AC this queue is mapped to */

41
drivers/net/wireless/intel/iwlwifi/mvm/sta.c
View file

@ -387,7 +387,7 @@ static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue,
spin_lock_bh(&mvm->queue_info_lock);
if (WARN_ON(mvm->queue_info[queue].hw_queue_refcount == 0)) {
if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) {
spin_unlock_bh(&mvm->queue_info_lock);
return 0;
}
@ -413,17 +413,16 @@ static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue,
if (remove_mac_queue)
mvm->hw_queue_to_mac80211[queue] &=
~BIT(mac80211_queue);
mvm->queue_info[queue].hw_queue_refcount--;
cmd.action = mvm->queue_info[queue].hw_queue_refcount ?
cmd.action = mvm->queue_info[queue].tid_bitmap ?
SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
if (cmd.action == SCD_CFG_DISABLE_QUEUE)
mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
IWL_DEBUG_TX_QUEUES(mvm,
"Disabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
"Disabling TXQ #%d tids=0x%x (mac80211 map:0x%x)\n",
queue,
mvm->queue_info[queue].hw_queue_refcount,
mvm->queue_info[queue].tid_bitmap,
mvm->hw_queue_to_mac80211[queue]);
/* If the queue is still enabled - nothing left to do in this func */
@ -436,16 +435,13 @@ static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue,
cmd.tid = mvm->queue_info[queue].txq_tid;
/* Make sure queue info is correct even though we overwrite it */
WARN(mvm->queue_info[queue].hw_queue_refcount ||
mvm->queue_info[queue].tid_bitmap ||
mvm->hw_queue_to_mac80211[queue],
"TXQ #%d info out-of-sync - refcount=%d, mac map=0x%x, tid=0x%x\n",
queue, mvm->queue_info[queue].hw_queue_refcount,
WARN(mvm->queue_info[queue].tid_bitmap ||
mvm->hw_queue_to_mac80211[queue],
"TXQ #%d info out-of-sync - mac map=0x%x, tids=0x%x\n",
queue, mvm->hw_queue_to_mac80211[queue],
mvm->queue_info[queue].tid_bitmap);
/* If we are here - the queue is freed and we can zero out these vals */
mvm->queue_info[queue].hw_queue_refcount = 0;
mvm->queue_info[queue].tid_bitmap = 0;
mvm->hw_queue_to_mac80211[queue] = 0;
@ -722,7 +718,7 @@ int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
cmd.tid = mvm->queue_info[queue].txq_tid;
mq = mvm->hw_queue_to_mac80211[queue];
shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
spin_unlock_bh(&mvm->queue_info_lock);
IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
@ -793,7 +789,7 @@ static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
/* Start by looking for a free queue */
for (i = minq; i <= maxq; i++)
if (mvm->queue_info[i].hw_queue_refcount == 0 &&
if (mvm->queue_info[i].tid_bitmap == 0 &&
mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
return i;
@ -877,7 +873,7 @@ static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, int queue,
}
/* Update mappings and refcounts */
if (mvm->queue_info[queue].hw_queue_refcount > 0)
if (mvm->queue_info[queue].tid_bitmap)
enable_queue = false;
if (mac80211_queue != IEEE80211_INVAL_HW_QUEUE) {
@ -888,7 +884,6 @@ static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, int queue,
mvm->hw_queue_to_mac80211[queue] |= BIT(mac80211_queue);
}
mvm->queue_info[queue].hw_queue_refcount++;
mvm->queue_info[queue].tid_bitmap |= BIT(tid);
mvm->queue_info[queue].ra_sta_id = sta_id;
@ -903,8 +898,8 @@ static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, int queue,
}
IWL_DEBUG_TX_QUEUES(mvm,
"Enabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
queue, mvm->queue_info[queue].hw_queue_refcount,
"Enabling TXQ #%d tids=0x%x (mac80211 map:0x%x)\n",
queue, mvm->queue_info[queue].tid_bitmap,
mvm->hw_queue_to_mac80211[queue]);
spin_unlock_bh(&mvm->queue_info_lock);
@ -1325,7 +1320,6 @@ static void iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
mvm->hw_queue_to_mac80211[queue] &= ~BIT(mac_queue);
mvm->queue_info[queue].hw_queue_refcount--;
mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
mvmsta->tid_data[tid].is_tid_active = false;
@ -1349,7 +1343,7 @@ static void iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
}
/* If the queue is marked as shared - "unshare" it */
if (mvm->queue_info[queue].hw_queue_refcount == 1 &&
if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
mvm->queue_info[queue].status = IWL_MVM_QUEUE_RECONFIGURING;
IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
@ -1367,9 +1361,12 @@ static void iwl_mvm_inactivity_check(struct iwl_mvm *mvm)
return;
spin_lock_bh(&mvm->queue_info_lock);
for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
if (mvm->queue_info[i].hw_queue_refcount > 0)
/* skip the CMD queue */
BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
if (mvm->queue_info[i].tid_bitmap)
timeout_queues_map |= BIT(i);
}
spin_unlock_bh(&mvm->queue_info_lock);
rcu_read_lock();
@ -1592,7 +1589,7 @@ static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
/* Make sure we have free resources for this STA */
if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
!mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
!mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
(mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
IWL_MVM_QUEUE_FREE))
queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;

2
drivers/net/wireless/intel/iwlwifi/mvm/utils.c
View file

@ -619,7 +619,7 @@ int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
return -EINVAL;
spin_lock_bh(&mvm->queue_info_lock);
if (WARN(mvm->queue_info[queue].hw_queue_refcount == 0,
if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
"Trying to reconfig unallocated queue %d\n", queue)) {
spin_unlock_bh(&mvm->queue_info_lock);
return -ENXIO;