/* * New version of ADD_STA_sta command added new fields at the end of the * structure, so sending the size of the relevant API's structure is enough to * support both API versions.
*/ staticinlineint iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
{ if (iwl_mvm_has_new_rx_api(mvm) ||
fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) returnsizeof(struct iwl_mvm_add_sta_cmd); else returnsizeof(struct iwl_mvm_add_sta_cmd_v7);
}
int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype)
{ int sta_id;
u32 reserved_ids = 0;
/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ if (iftype != NL80211_IFTYPE_STATION)
reserved_ids = BIT(0);
/* Don't take rcu_read_lock() since we are protected by mvm->mutex */ for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) { if (BIT(sta_id) & reserved_ids) continue;
if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex))) return sta_id;
} return IWL_INVALID_STA;
}
/* Calculate the ampdu density and max size */
u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta, struct ieee80211_bss_conf *link_conf,
u32 *_agg_size)
{
u32 agg_size = 0, mpdu_dens = 0;
if (WARN_ON(!link_sta)) return 0;
/* Note that we always use only legacy & highest supported PPDUs, so * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating * the maximum A-MPDU size of various PPDU types in different bands, * we only need to worry about the highest supported PPDU type here.
*/
if (link_sta->ht_cap.ht_supported) {
agg_size = link_sta->ht_cap.ampdu_factor;
mpdu_dens = link_sta->ht_cap.ampdu_density;
}
if (link_conf->chanreq.oper.chan->band == NL80211_BAND_6GHZ) { /* overwrite HT values on 6 GHz */
mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa,
IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa,
IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
} elseif (link_sta->vht_cap.vht_supported) { /* if VHT supported overwrite HT value */
agg_size = u32_get_bits(link_sta->vht_cap.cap,
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
}
/* D6.0 10.12.2 A-MPDU length limit rules * A STA indicates the maximum length of the A-MPDU preEOF padding * that it can receive in an HE PPDU in the Maximum A-MPDU Length * Exponent field in its HT Capabilities, VHT Capabilities, * and HE 6 GHz Band Capabilities elements (if present) and the * Maximum AMPDU Length Exponent Extension field in its HE * Capabilities element
*/ if (link_sta->he_cap.has_he)
agg_size +=
u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3],
IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
if (link_sta->eht_cap.has_eht)
agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1],
IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK);
/* Limit to max A-MPDU supported by FW */
agg_size = min_t(u32, agg_size,
STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT);
/* Timer expired */
sta_id = ffs(ba_data->sta_mask) - 1; /* don't care which one */
sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[sta_id]);
/* * sta should be valid unless the following happens: * The firmware asserts which triggers a reconfig flow, but * the reconfig fails before we set the pointer to sta into * the fw_id_to_mac_id pointer table. Mac80211 can't stop * A-MDPU and hence the timer continues to run. Then, the * timer expires and sta is NULL.
*/ if (IS_ERR_OR_NULL(sta)) goto unlock;
/* Disable aggregations for a bitmap of TIDs for a given station */ staticint iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, unsignedlong disable_agg_tids, bool remove_queue)
{ struct iwl_mvm_add_sta_cmd cmd = {}; struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta;
u32 status;
u8 sta_id;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return -EINVAL;
sta_id = mvm->queue_info[queue].ra_sta_id;
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
rcu_read_unlock(); return -EINVAL;
}
/* Notify FW of queue removal from the STA queues */
status = ADD_STA_SUCCESS; return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status);
}
/* Make sure queue info is correct even though we overwrite it */
WARN(mvm->queue_info[queue].tid_bitmap, "TXQ #%d info out-of-sync - tids=0x%x\n",
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].tid_bitmap = 0;
if (sta) { struct iwl_mvm_txq *mvmtxq =
iwl_mvm_txq_from_tid(sta, tid);
/* * Remove a queue from a station's resources. * Note that this only marks as free. It DOESN'T delete a BA agreement, and * doesn't disable the queue
*/ staticint iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
{ struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta; unsignedlong tid_bitmap; unsignedlong disable_agg_tids = 0;
u8 sta_id; int tid;
lockdep_assert_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return -EINVAL;
mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
spin_unlock_bh(&mvmsta->lock);
rcu_read_unlock();
/* * The TX path may have been using this TXQ_ID from the tid_data, * so make sure it's no longer running so that we can safely reuse * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE * above, but nothing guarantees we've stopped using them. Thus, * without this, we could get to iwl_mvm_disable_txq() and remove * the queue while still sending frames to it.
*/
synchronize_net();
/* See what ACs the existing queues for this STA have */
for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { /* Only DATA queues can be shared */ if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) continue;
/* * The queue to share is chosen only from DATA queues as follows (in * descending priority): * 1. An AC_BE queue * 2. Same AC queue * 3. Highest AC queue that is lower than new AC * 4. Any existing AC (there always is at least 1 DATA queue)
*/
/* Priority 1: An AC_BE queue */ if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_BE]; /* Priority 2: Same AC queue */ elseif (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[ac]; /* Priority 3a: If new AC is VO and VI exists - use VI */ elseif (ac == IEEE80211_AC_VO &&
ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VI]; /* Priority 3b: No BE so only AC less than the new one is BK */ elseif (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_BK]; /* Priority 4a: No BE nor BK - use VI if exists */ elseif (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VI]; /* Priority 4b: No BE, BK nor VI - use VO if exists */ elseif (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
queue = ac_to_queue[IEEE80211_AC_VO];
/* Make sure queue found (or not) is legal */ if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
!iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
(queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
IWL_ERR(mvm, "No DATA queues available to share\n"); return -ENOSPC;
}
return queue;
}
/* Re-configure the SCD for a queue that has already been configured */ staticint iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id, int tid, int frame_limit, u16 ssn)
{ struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_ENABLE_QUEUE,
.window = frame_limit,
.sta_id = sta_id,
.ssn = cpu_to_le16(ssn),
.tx_fifo = fifo,
.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
.tid = tid,
}; int ret;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return -EINVAL;
if (WARN(mvm->queue_info[queue].tid_bitmap == 0, "Trying to reconfig unallocated queue %d\n", queue)) return -ENXIO;
IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
queue, fifo, ret);
return ret;
}
/* * If a given queue has a higher AC than the TID stream that is being compared * to, the queue needs to be redirected to the lower AC. This function does that * in such a case, otherwise - if no redirection required - it does nothing, * unless the %force param is true.
*/ staticint iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid, int ac, int ssn, unsignedint wdg_timeout, bool force, struct iwl_mvm_txq *txq)
{ struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_DISABLE_QUEUE,
}; bool shared_queue; int ret;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return -EINVAL;
/* * If the AC is lower than current one - FIFO needs to be redirected to * the lowest one of the streams in the queue. Check if this is needed * here. * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with * value 3 and VO with value 0, so to check if ac X is lower than ac Y * we need to check if the numerical value of X is LARGER than of Y.
*/ if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
IWL_DEBUG_TX_QUEUES(mvm, "No redirection needed on TXQ #%d\n",
queue); return 0;
}
IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
queue, iwl_mvm_ac_to_tx_fifo[ac]);
/* Stop the queue and wait for it to empty */
set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue)); if (ret) {
IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
queue);
ret = -EIO; goto out;
}
/* Before redirecting the queue we need to de-activate it */
iwl_trans_txq_disable(mvm->trans, queue, false);
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); if (ret)
IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
ret);
/* Make sure the SCD wrptr is correctly set before reconfiguring */
iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
/* Update the TID "owner" of the queue */
mvm->queue_info[queue].txq_tid = tid;
/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
/* Redirect to lower AC */
iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
/* Update AC marking of the queue */
mvm->queue_info[queue].mac80211_ac = ac;
/* * Mark queue as shared in transport if shared * Note this has to be done after queue enablement because enablement * can also set this value, and there is no indication there to shared * queues
*/ if (shared_queue)
iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
out: /* Continue using the queue */
clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
/* This should not be hit with new TX path */ if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return -ENOSPC;
/* Start by looking for a free queue */ for (i = minq; i <= maxq; i++) if (mvm->queue_info[i].tid_bitmap == 0 &&
mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE) return i;
IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue for sta %d on tid %d\n",
mvmsta->deflink.sta_id, tid);
queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
tid, wdg_timeout); if (queue < 0) return queue;
/* Make sure this TID isn't already enabled */ if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
queue, tid); returnfalse;
}
/* Update mappings and refcounts */ if (mvm->queue_info[queue].tid_bitmap)
enable_queue = false;
WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd), "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
return inc_ssn;
}
staticvoid iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
{ struct iwl_scd_txq_cfg_cmd cmd = {
.scd_queue = queue,
.action = SCD_CFG_UPDATE_QUEUE_TID,
}; int tid; unsignedlong tid_bitmap; int ret;
lockdep_assert_held(&mvm->mutex);
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return;
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue)) return;
/* Find any TID for queue */
tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
cmd.tid = tid;
cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); if (ret) {
IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
queue, ret); return;
}
mvm->queue_info[queue].txq_tid = tid;
IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
queue, tid);
}
staticvoid iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{ struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta;
u8 sta_id; int tid = -1; unsignedlong tid_bitmap; unsignedint wdg_timeout; int ssn; int ret = true;
/* queue sharing is disabled on new TX path */ if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return;
/* Find TID for queue, and make sure it is the only one on the queue */
tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); if (tid_bitmap != BIT(tid)) {
IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
queue, tid_bitmap); return;
}
IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
tid);
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
iwl_mvm_add_sta_cmd_size(mvm), &cmd); if (!ret) {
IWL_DEBUG_TX_QUEUES(mvm, "TXQ #%d is now aggregated again\n",
queue);
/* Mark queue intenally as aggregating again */
iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
}
}
/* * Remove inactive TIDs of a given queue. * If all queue TIDs are inactive - mark the queue as inactive * If only some the queue TIDs are inactive - unmap them from the queue * * Returns %true if all TIDs were removed and the queue could be reused.
*/ staticbool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, int queue, unsignedlong tid_bitmap, unsignedlong *unshare_queues, unsignedlong *changetid_queues)
{ unsignedint tid;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) returnfalse;
/* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { /* If some TFDs are still queued - don't mark TID as inactive */ if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
tid_bitmap &= ~BIT(tid);
/* Don't mark as inactive any TID that has an active BA */ if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
tid_bitmap &= ~BIT(tid);
}
/* If all TIDs in the queue are inactive - return it can be reused */ if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue); returntrue;
}
/* * If we are here, this is a shared queue and not all TIDs timed-out. * Remove the ones that did.
*/
for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
u16 q_tid_bitmap;
/* * We need to take into account a situation in which a TXQ was * allocated to TID x, and then turned shared by adding TIDs y * and z. If TID x becomes inactive and is removed from the TXQ, * ownership must be given to one of the remaining TIDs. * This is mainly because if TID x continues - a new queue can't * be allocated for it as long as it is an owner of another TXQ. * * Mark this queue in the right bitmap, we'll send the command * to the firmware later.
*/ if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
set_bit(queue, changetid_queues);
IWL_DEBUG_TX_QUEUES(mvm, "Removing inactive TID %d from shared Q:%d\n",
tid, queue);
}
IWL_DEBUG_TX_QUEUES(mvm, "TXQ #%d left with tid bitmap 0x%x\n", queue,
mvm->queue_info[queue].tid_bitmap);
/* * There may be different TIDs with the same mac queues, so make * sure all TIDs have existing corresponding mac queues enabled
*/
tid_bitmap = mvm->queue_info[queue].tid_bitmap;
/* If the queue is marked as shared - "unshare" it */ if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
queue);
set_bit(queue, unshare_queues);
}
returnfalse;
}
/* * Check for inactivity - this includes checking if any queue * can be unshared and finding one (and only one) that can be * reused. * This function is also invoked as a sort of clean-up task, * in which case @alloc_for_sta is IWL_INVALID_STA. * * Returns the queue number, or -ENOSPC.
*/ staticint iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
{ unsignedlong now = jiffies; unsignedlong unshare_queues = 0; unsignedlong changetid_queues = 0; int i, ret, free_queue = -ENOSPC; struct ieee80211_sta *queue_owner = NULL;
lockdep_assert_held(&mvm->mutex);
if (iwl_mvm_has_new_tx_api(mvm)) return -ENOSPC;
rcu_read_lock();
/* we skip the CMD queue below by starting at 1 */
BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
for (i = 1; i < IWL_MAX_HW_QUEUES; i++) { struct ieee80211_sta *sta; struct iwl_mvm_sta *mvmsta;
u8 sta_id; int tid; unsignedlong inactive_tid_bitmap = 0; unsignedlong queue_tid_bitmap;
queue_tid_bitmap = mvm->queue_info[i].tid_bitmap; if (!queue_tid_bitmap) continue;
/* If TXQ isn't in active use anyway - nothing to do here... */ if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) continue;
/* Check to see if there are inactive TIDs on this queue */
for_each_set_bit(tid, &queue_tid_bitmap,
IWL_MAX_TID_COUNT + 1) { if (time_after(mvm->queue_info[i].last_frame_time[tid] +
IWL_MVM_DQA_QUEUE_TIMEOUT, now)) continue;
inactive_tid_bitmap |= BIT(tid);
}
/* If all TIDs are active - finish check on this queue */ if (!inactive_tid_bitmap) continue;
/* * If we are here - the queue hadn't been served recently and is * in use
*/
sta_id = mvm->queue_info[i].ra_sta_id;
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
/* * If the STA doesn't exist anymore, it isn't an error. It could * be that it was removed since getting the queues, and in this * case it should've inactivated its queues anyway.
*/ if (IS_ERR_OR_NULL(sta)) continue;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
spin_lock_bh(&mvmsta->lock);
ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
inactive_tid_bitmap,
&unshare_queues,
&changetid_queues); if (ret && free_queue < 0) {
queue_owner = sta;
free_queue = i;
} /* only unlock sta lock - we still need the queue info lock */
spin_unlock_bh(&mvmsta->lock);
}
if (queue < 0)
queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
IWL_MVM_DQA_MIN_DATA_QUEUE,
IWL_MVM_DQA_MAX_DATA_QUEUE); if (queue < 0) { /* try harder - perhaps kill an inactive queue */
queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
}
/* No free queue - we'll have to share */ if (queue <= 0) {
queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); if (queue > 0) {
shared_queue = true;
mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
}
}
/* * Mark TXQ as ready, even though it hasn't been fully configured yet, * to make sure no one else takes it. * This will allow avoiding re-acquiring the lock at the end of the * configuration. On error we'll mark it back as free.
*/ if (queue > 0 && !shared_queue)
mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
/* This shouldn't happen - out of queues */ if (WARN_ON(queue <= 0)) {
IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
tid, cfg.sta_id); return queue;
}
/* * Actual en/disablement of aggregations is through the ADD_STA HCMD, * but for configuring the SCD to send A-MPDUs we need to mark the queue * as aggregatable. * Mark all DATA queues as allowing to be aggregated at some point
*/
cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
IWL_DEBUG_TX_QUEUES(mvm, "Allocating %squeue #%d to sta %d on tid %d\n",
shared_queue ? "shared " : "", queue,
mvmsta->deflink.sta_id, tid);
if (shared_queue) { /* Disable any open aggs on this queue */
disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
if (disable_agg_tids) {
IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
queue);
iwl_mvm_invalidate_sta_queue(mvm, queue,
disable_agg_tids, false);
}
}
/* * Mark queue as shared in transport if shared * Note this has to be done after queue enablement because enablement * can also set this value, and there is no indication there to shared * queues
*/ if (shared_queue)
iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
spin_lock_bh(&mvmsta->lock); /* * This looks racy, but it is not. We have only one packet for * this ra/tid in our Tx path since we stop the Qdisc when we * need to allocate a new TFD queue.
*/ if (inc_ssn) {
mvmsta->tid_data[tid].seq_number += 0x10;
ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
}
mvmsta->tid_data[tid].txq_id = queue;
mvmsta->tfd_queue_msk |= BIT(queue);
queue_state = mvmsta->tid_data[tid].state;
if (mvmsta->reserved_queue == queue)
mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
spin_unlock_bh(&mvmsta->lock);
if (!shared_queue) {
ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); if (ret) goto out_err;
/* If we need to re-enable aggregations... */ if (queue_state == IWL_AGG_ON) {
ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); if (ret) goto out_err;
}
} else { /* Redirect queue, if needed */
ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
wdg_timeout, false,
iwl_mvm_txq_from_tid(sta, tid)); if (ret) goto out_err;
}
/* will reschedule to run after restart */ if (test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status) ||
test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) return;
txq = container_of((void *)mvmtxq, struct ieee80211_txq,
drv_priv);
tid = txq->tid; if (tid == IEEE80211_NUM_TIDS)
tid = IWL_MAX_TID_COUNT;
/* * We can't really do much here, but if this fails we can't * transmit anyway - so just don't transmit the frame etc. * and let them back up ... we've tried our best to allocate * a queue in the function itself.
*/ if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
spin_lock_bh(&mvm->add_stream_lock);
list_del_init(&mvmtxq->list);
spin_unlock_bh(&mvm->add_stream_lock); continue;
}
/* now we're ready, any remaining races/concurrency will be * handled in iwl_mvm_mac_itxq_xmit()
*/
set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
/* queue reserving is disabled on new TX path */ if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) return 0;
/* run the general cleanup/unsharing of queues */
iwl_mvm_inactivity_check(mvm, IWL_INVALID_STA);
/* 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].tid_bitmap &&
(mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
IWL_MVM_QUEUE_FREE))
queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; else
queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
IWL_MVM_DQA_MIN_DATA_QUEUE,
IWL_MVM_DQA_MAX_DATA_QUEUE); if (queue < 0) { /* try again - this time kick out a queue if needed */
queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id); if (queue < 0) {
IWL_ERR(mvm, "No available queues for new station\n"); return -ENOSPC;
}
}
mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
mvmsta->reserved_queue = queue;
IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
queue, mvmsta->deflink.sta_id);
return 0;
}
/* * In DQA mode, after a HW restart the queues should be allocated as before, in * order to avoid race conditions when there are shared queues. This function * does the re-mapping and queue allocation. * * Note that re-enabling aggregations isn't done in this function.
*/ void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, struct ieee80211_sta *sta)
{ struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); unsignedint wdg =
iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif); int i; struct iwl_trans_txq_scd_cfg cfg = {
.sta_id = mvm_sta->deflink.sta_id,
.frame_limit = IWL_FRAME_LIMIT,
};
/* Make sure reserved queue is still marked as such (if allocated) */ if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
mvm->queue_info[mvm_sta->reserved_queue].status =
IWL_MVM_QUEUE_RESERVED;
for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; int txq_id = tid_data->txq_id; int ac;
if (txq_id == IWL_MVM_INVALID_QUEUE) continue;
ac = tid_to_mac80211_ac[i];
if (iwl_mvm_has_new_tx_api(mvm)) {
IWL_DEBUG_TX_QUEUES(mvm, "Re-mapping sta %d tid %d\n",
mvm_sta->deflink.sta_id, i);
txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta,
mvm_sta->deflink.sta_id,
i, wdg); /* * on failures, just set it to IWL_MVM_INVALID_QUEUE * to try again later, we have no other good way of * failing here
*/ if (txq_id < 0)
txq_id = IWL_MVM_INVALID_QUEUE;
tid_data->txq_id = txq_id;
/* * Since we don't set the seq number after reset, and HW * sets it now, FW reset will cause the seq num to start * at 0 again, so driver will need to update it * internally as well, so it keeps in sync with real val
*/
tid_data->seq_number = 0;
} else {
u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
cmd.station_type = sta->type;
if (!iwl_mvm_has_new_tx_api(mvm))
cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
cmd.tid_disable_tx = cpu_to_le16(0xffff);
if (addr)
memcpy(cmd.addr, addr, ETH_ALEN);
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status); if (ret) return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) { case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Internal station added.\n"); return 0; default:
ret = -EIO;
IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
status); break;
} return ret;
}
/* Initialize driver data of a new sta */ int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, int sta_id, u8 sta_type)
{ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_rxq_dup_data *dup_data; int i, ret = 0;
/* for MLD sta_id(s) should be allocated for each link before calling * this function
*/ if (!mvm->mld_api_is_used) { if (WARN_ON(sta_id == IWL_INVALID_STA)) return -EINVAL;
mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { /* * Mark all queues for this STA as unallocated and defer TX * frames until the queue is allocated
*/
mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
}
for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { struct iwl_mvm_txq *mvmtxq =
iwl_mvm_txq_from_mac80211(sta->txq[i]);
dup_data = kcalloc(mvm->trans->info.num_rxqs, sizeof(*dup_data), GFP_KERNEL); if (!dup_data) return -ENOMEM; /* * Initialize all the last_seq values to 0xffff which can never * compare equal to the frame's seq_ctrl in the check in * iwl_mvm_is_dup() since the lower 4 bits are the fragment * number and fragmented packets don't reach that function. * * This thus allows receiving a packet with seqno 0 and the * retry bit set as the very first packet on a new TID.
*/ for (q = 0; q < mvm->trans->info.num_rxqs; q++)
memset(dup_data[q].last_seq, 0xff, sizeof(dup_data[q].last_seq));
mvm_sta->dup_data = dup_data;
}
if (!iwl_mvm_has_new_tx_api(mvm)) {
ret = iwl_mvm_reserve_sta_stream(mvm, sta,
ieee80211_vif_type_p2p(vif)); if (ret) return ret;
}
/* * if rs is registered with mac80211, then "add station" will be handled * via the corresponding ops, otherwise need to notify rate scaling here
*/ if (iwl_mvm_has_tlc_offload(mvm))
iwl_mvm_rs_add_sta(mvm, mvm_sta); else
spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock);
iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
/* MPDUs are counted only when EMLSR is possible */ if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
!sta->tdls && ieee80211_vif_is_mld(vif)) {
mvm_sta->mpdu_counters =
kcalloc(mvm->trans->info.num_rxqs, sizeof(*mvm_sta->mpdu_counters),
GFP_KERNEL); if (mvm_sta->mpdu_counters) for (int q = 0; q < mvm->trans->info.num_rxqs; q++)
spin_lock_init(&mvm_sta->mpdu_counters[q].lock);
}
/* if this is a HW restart re-alloc existing queues */ if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { struct iwl_mvm_int_sta tmp_sta = {
.sta_id = sta_id,
.type = mvm_sta->sta_type,
};
/* First add an empty station since allocating * a queue requires a valid station
*/
ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
mvmvif->id, mvmvif->color); if (ret) goto err;
status = ADD_STA_SUCCESS;
ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
iwl_mvm_add_sta_cmd_size(mvm),
&cmd, &status); if (ret) return ret;
switch (status & IWL_ADD_STA_STATUS_MASK) { case ADD_STA_SUCCESS:
IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
mvmsta->deflink.sta_id); break; default:
ret = -EIO;
IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
mvmsta->deflink.sta_id); break;
}
return ret;
}
/* * Remove a station from the FW table. Before sending the command to remove * the station validate that the station is indeed known to the driver (sanity * only).
*/ staticint iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{ struct ieee80211_sta *sta; struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
.sta_id = sta_id,
}; int ret;
sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
lockdep_is_held(&mvm->mutex));
/* Note: internal stations are marked as error values */ if (!sta) {
IWL_ERR(mvm, "Invalid station id\n"); return -EINVAL;
}
ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, sizeof(rm_sta_cmd), &rm_sta_cmd); if (ret) {
IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); return ret;
}
if (vif->type == NL80211_IFTYPE_STATION &&
mvm_link->ap_sta_id == sta_id) { /* first remove remaining keys */
iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link,
link_sta->link_id);
mvm_link->ap_sta_id = IWL_INVALID_STA;
}
/* * This shouldn't happen - the TDLS channel switch should be canceled * before the STA is removed.
*/ if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
mvm->tdls_cs.peer.sta_id = IWL_INVALID_STA;
cancel_delayed_work(&mvm->tdls_cs.dwork);
}
}
int iwl_mvm_rm_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta)
{ struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); if (ret) return ret;
/* flush its queues here since we are freeing mvm_sta */
ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
mvm_sta->tfd_queue_msk); if (ret) return ret; if (iwl_mvm_has_new_tx_api(mvm)) {
ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
} else {
u32 q_mask = mvm_sta->tfd_queue_msk;
ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
q_mask);
} if (ret) return ret;
ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
iwl_mvm_disable_sta_queues(mvm, vif, sta);
/* If there is a TXQ still marked as reserved - free it */ if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
u8 reserved_txq = mvm_sta->reserved_queue; enum iwl_mvm_queue_status *status;
/* * If no traffic has gone through the reserved TXQ - it * is still marked as IWL_MVM_QUEUE_RESERVED, and * should be manually marked as free again
*/
status = &mvm->queue_info[reserved_txq].status; if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
(*status != IWL_MVM_QUEUE_FREE), "sta_id %d reserved txq %d status %d",
mvm_sta->deflink.sta_id, reserved_txq, *status)) return -EINVAL;
*status = IWL_MVM_QUEUE_FREE;
}
iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink);
ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
return ret;
}
int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
u8 sta_id)
{ int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
/* put a non-NULL value so iterating over the stations won't stop */
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); return 0;
}
staticint iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx, int maccolor, u8 *addr, struct iwl_mvm_int_sta *sta,
u16 *queue, int fifo)
{ int ret;
/* Map queue to fifo - needs to happen before adding station */ if (!iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor); if (ret) { if (!iwl_mvm_has_new_tx_api(mvm))
iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
IWL_MAX_TID_COUNT); return ret;
}
/* * For 22000 firmware and on we cannot add queue to a station unknown * to firmware so enable queue here - after the station was added
*/ if (iwl_mvm_has_new_tx_api(mvm)) { int txq;
int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
{ int ret;
u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
BIT(mvm->aux_queue);
lockdep_assert_held(&mvm->mutex);
/* Allocate aux station and assign to it the aux queue */
ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
NL80211_IFTYPE_UNSPECIFIED,
IWL_STA_AUX_ACTIVITY); if (ret) return ret;
/* * In CDB NICs we need to specify which lmac to use for aux activity * using the mac_id argument place to send lmac_id to the function
*/
ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
&mvm->aux_sta, &mvm->aux_queue,
IWL_MVM_TX_FIFO_MCAST); if (ret) {
iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); return ret;
}
/* * Send the add station command for the vif's broadcast station. * Assumes that the station was already allocated. * * @mvm: the mvm component * @vif: the interface to which the broadcast station is added * @bsta: the broadcast station to add.
*/ int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
--> --------------------
--> maximum size reached
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