2 * Marvell Wireless LAN device driver: WMM
4 * Copyright (C) 2011, Marvell International Ltd.
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
29 /* Maximum value FW can accept for driver delay in packet transmission */
30 #define DRV_PKT_DELAY_TO_FW_MAX 512
33 #define WMM_QUEUED_PACKET_LOWER_LIMIT 180
35 #define WMM_QUEUED_PACKET_UPPER_LIMIT 200
37 /* Offset for TOS field in the IP header */
38 #define IPTOS_OFFSET 5
40 /* WMM information IE */
41 static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
42 0x00, 0x50, 0xf2, 0x02,
46 static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
52 static u8 tos_to_tid[] = {
53 /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
54 0x01, /* 0 1 0 AC_BK */
55 0x02, /* 0 0 0 AC_BK */
56 0x00, /* 0 0 1 AC_BE */
57 0x03, /* 0 1 1 AC_BE */
58 0x04, /* 1 0 0 AC_VI */
59 0x05, /* 1 0 1 AC_VI */
60 0x06, /* 1 1 0 AC_VO */
61 0x07 /* 1 1 1 AC_VO */
65 * This table inverses the tos_to_tid operation to get a priority
66 * which is in sequential order, and can be compared.
67 * Use this to compare the priority of two different TIDs.
69 static u8 tos_to_tid_inv[] = {
70 0x02, /* from tos_to_tid[2] = 0 */
71 0x00, /* from tos_to_tid[0] = 1 */
72 0x01, /* from tos_to_tid[1] = 2 */
79 static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
82 * This function debug prints the priority parameters for a WMM AC.
85 mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
87 const char *ac_str[] = { "BK", "BE", "VI", "VO" };
89 pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
90 "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
91 ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
92 & MWIFIEX_ACI) >> 5]],
93 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
94 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
95 ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
96 ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
97 (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
98 le16_to_cpu(ac_param->tx_op_limit));
102 * This function allocates a route address list.
104 * The function also initializes the list with the provided RA.
106 static struct mwifiex_ra_list_tbl *
107 mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
109 struct mwifiex_ra_list_tbl *ra_list;
111 ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
115 INIT_LIST_HEAD(&ra_list->list);
116 skb_queue_head_init(&ra_list->skb_head);
118 memcpy(ra_list->ra, ra, ETH_ALEN);
120 ra_list->total_pkts_size = 0;
122 dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
127 /* This function returns random no between 16 and 32 to be used as threshold
128 * for no of packets after which BA setup is initiated.
130 static u8 mwifiex_get_random_ba_threshold(void)
133 struct timeval ba_tstamp;
136 /* setup ba_packet_threshold here random number between
137 * [BA_SETUP_PACKET_OFFSET,
138 * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
141 do_gettimeofday(&ba_tstamp);
142 sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16);
143 usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16);
144 ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD)
145 + BA_SETUP_PACKET_OFFSET;
151 * This function allocates and adds a RA list for all TIDs
155 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
158 struct mwifiex_ra_list_tbl *ra_list;
159 struct mwifiex_adapter *adapter = priv->adapter;
160 struct mwifiex_sta_node *node;
163 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
164 node = mwifiex_get_sta_entry(priv, ra);
165 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
167 for (i = 0; i < MAX_NUM_TID; ++i) {
168 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
169 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
174 ra_list->is_11n_enabled = 0;
175 if (!mwifiex_queuing_ra_based(priv)) {
176 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
178 ra_list->is_11n_enabled =
179 mwifiex_is_sta_11n_enabled(priv, node);
180 if (ra_list->is_11n_enabled)
181 ra_list->max_amsdu = node->max_amsdu;
184 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
185 ra_list, ra_list->is_11n_enabled);
187 if (ra_list->is_11n_enabled) {
188 ra_list->pkt_count = 0;
189 ra_list->ba_packet_thr =
190 mwifiex_get_random_ba_threshold();
192 list_add_tail(&ra_list->list,
193 &priv->wmm.tid_tbl_ptr[i].ra_list);
195 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
196 priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
201 * This function sets the WMM queue priorities to their default values.
203 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
205 /* Default queue priorities: VO->VI->BE->BK */
206 priv->wmm.queue_priority[0] = WMM_AC_VO;
207 priv->wmm.queue_priority[1] = WMM_AC_VI;
208 priv->wmm.queue_priority[2] = WMM_AC_BE;
209 priv->wmm.queue_priority[3] = WMM_AC_BK;
213 * This function map ACs to TIDs.
216 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
218 u8 *queue_priority = wmm->queue_priority;
221 for (i = 0; i < 4; ++i) {
222 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
223 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
226 for (i = 0; i < MAX_NUM_TID; ++i)
227 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
229 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
233 * This function initializes WMM priority queues.
236 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
237 struct ieee_types_wmm_parameter *wmm_ie)
239 u16 cw_min, avg_back_off, tmp[4];
243 if (!wmm_ie || !priv->wmm_enabled) {
244 /* WMM is not enabled, just set the defaults and return */
245 mwifiex_wmm_default_queue_priorities(priv);
249 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
250 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
251 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
252 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
255 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
256 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
257 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
258 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
259 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
261 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
262 priv->wmm.queue_priority[ac_idx] = ac_idx;
263 tmp[ac_idx] = avg_back_off;
265 dev_dbg(priv->adapter->dev,
266 "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
267 (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
268 cw_min, avg_back_off);
269 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
273 for (i = 0; i < num_ac; i++) {
274 for (j = 1; j < num_ac - i; j++) {
275 if (tmp[j - 1] > tmp[j]) {
276 swap(tmp[j - 1], tmp[j]);
277 swap(priv->wmm.queue_priority[j - 1],
278 priv->wmm.queue_priority[j]);
279 } else if (tmp[j - 1] == tmp[j]) {
280 if (priv->wmm.queue_priority[j - 1]
281 < priv->wmm.queue_priority[j])
282 swap(priv->wmm.queue_priority[j - 1],
283 priv->wmm.queue_priority[j]);
288 mwifiex_wmm_queue_priorities_tid(&priv->wmm);
292 * This function evaluates whether or not an AC is to be downgraded.
294 * In case the AC is not enabled, the highest AC is returned that is
295 * enabled and does not require admission control.
297 static enum mwifiex_wmm_ac_e
298 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
299 enum mwifiex_wmm_ac_e eval_ac)
302 enum mwifiex_wmm_ac_e ret_ac;
303 struct mwifiex_wmm_ac_status *ac_status;
305 ac_status = &priv->wmm.ac_status[eval_ac];
307 if (!ac_status->disabled)
308 /* Okay to use this AC, its enabled */
311 /* Setup a default return value of the lowest priority */
315 * Find the highest AC that is enabled and does not require
316 * admission control. The spec disallows downgrading to an AC,
317 * which is enabled due to a completed admission control.
318 * Unadmitted traffic is not to be sent on an AC with admitted
321 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
322 ac_status = &priv->wmm.ac_status[down_ac];
324 if (!ac_status->disabled && !ac_status->flow_required)
325 /* AC is enabled and does not require admission
327 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
334 * This function downgrades WMM priority queue.
337 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
341 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
342 "BK(0), BE(1), VI(2), VO(3)\n");
344 if (!priv->wmm_enabled) {
345 /* WMM is not enabled, default priorities */
346 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
347 priv->wmm.ac_down_graded_vals[ac_val] =
348 (enum mwifiex_wmm_ac_e) ac_val;
350 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
351 priv->wmm.ac_down_graded_vals[ac_val]
352 = mwifiex_wmm_eval_downgrade_ac(priv,
353 (enum mwifiex_wmm_ac_e) ac_val);
354 dev_dbg(priv->adapter->dev,
355 "info: WMM: AC PRIO %d maps to %d\n",
356 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
362 * This function converts the IP TOS field to an WMM AC
365 static enum mwifiex_wmm_ac_e
366 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
368 /* Map of TOS UP values to WMM AC */
369 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
379 if (tos >= ARRAY_SIZE(tos_to_ac))
382 return tos_to_ac[tos];
386 * This function evaluates a given TID and downgrades it to a lower
387 * TID if the WMM Parameter IE received from the AP indicates that the
388 * AP is disabled (due to call admission control (ACM bit). Mapping
389 * of TID to AC is taken care of internally.
392 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
394 enum mwifiex_wmm_ac_e ac, ac_down;
397 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
398 ac_down = priv->wmm.ac_down_graded_vals[ac];
400 /* Send the index to tid array, picking from the array will be
401 * taken care by dequeuing function
403 new_tid = ac_to_tid[ac_down][tid % 2];
409 * This function initializes the WMM state information and the
410 * WMM data path queues.
413 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
416 struct mwifiex_private *priv;
418 for (j = 0; j < adapter->priv_num; ++j) {
419 priv = adapter->priv[j];
423 for (i = 0; i < MAX_NUM_TID; ++i) {
424 priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
425 priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
426 priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
427 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
430 priv->aggr_prio_tbl[6].amsdu
431 = priv->aggr_prio_tbl[6].ampdu_ap
432 = priv->aggr_prio_tbl[6].ampdu_user
433 = BA_STREAM_NOT_ALLOWED;
435 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
436 = priv->aggr_prio_tbl[7].ampdu_user
437 = BA_STREAM_NOT_ALLOWED;
439 mwifiex_set_ba_params(priv);
440 mwifiex_reset_11n_rx_seq_num(priv);
442 atomic_set(&priv->wmm.tx_pkts_queued, 0);
443 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
448 * This function checks if WMM Tx queue is empty.
451 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
454 struct mwifiex_private *priv;
456 for (i = 0; i < adapter->priv_num; ++i) {
457 priv = adapter->priv[i];
458 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
466 * This function deletes all packets in an RA list node.
468 * The packet sent completion callback handler are called with
469 * status failure, after they are dequeued to ensure proper
470 * cleanup. The RA list node itself is freed at the end.
473 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
474 struct mwifiex_ra_list_tbl *ra_list)
476 struct mwifiex_adapter *adapter = priv->adapter;
477 struct sk_buff *skb, *tmp;
479 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
480 mwifiex_write_data_complete(adapter, skb, 0, -1);
484 * This function deletes all packets in an RA list.
486 * Each nodes in the RA list are freed individually first, and then
487 * the RA list itself is freed.
490 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
491 struct list_head *ra_list_head)
493 struct mwifiex_ra_list_tbl *ra_list;
495 list_for_each_entry(ra_list, ra_list_head, list)
496 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
500 * This function deletes all packets in all RA lists.
502 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
506 for (i = 0; i < MAX_NUM_TID; i++)
507 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
510 atomic_set(&priv->wmm.tx_pkts_queued, 0);
511 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
515 * This function deletes all route addresses from all RA lists.
517 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
519 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
522 for (i = 0; i < MAX_NUM_TID; ++i) {
523 dev_dbg(priv->adapter->dev,
524 "info: ra_list: freeing buf for tid %d\n", i);
525 list_for_each_entry_safe(ra_list, tmp_node,
526 &priv->wmm.tid_tbl_ptr[i].ra_list,
528 list_del(&ra_list->list);
532 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
534 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
539 * This function cleans up the Tx and Rx queues.
542 * - All packets in RA lists
543 * - All entries in Rx reorder table
544 * - All entries in Tx BA stream table
545 * - MPA buffer (if required)
549 mwifiex_clean_txrx(struct mwifiex_private *priv)
553 mwifiex_11n_cleanup_reorder_tbl(priv);
554 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
556 mwifiex_wmm_cleanup_queues(priv);
557 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
559 if (priv->adapter->if_ops.cleanup_mpa_buf)
560 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
562 mwifiex_wmm_delete_all_ralist(priv);
563 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
565 if (priv->adapter->if_ops.clean_pcie_ring)
566 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
567 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
571 * This function retrieves a particular RA list node, matching with the
572 * given TID and RA address.
574 static struct mwifiex_ra_list_tbl *
575 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
578 struct mwifiex_ra_list_tbl *ra_list;
580 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
582 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
590 * This function retrieves an RA list node for a given TID and
593 * If no such node is found, a new node is added first and then
596 static struct mwifiex_ra_list_tbl *
597 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
599 struct mwifiex_ra_list_tbl *ra_list;
601 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
604 mwifiex_ralist_add(priv, ra_addr);
606 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
610 * This function checks if a particular RA list node exists in a given TID
614 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
615 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
617 struct mwifiex_ra_list_tbl *rlist;
619 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
621 if (rlist == ra_list)
629 * This function adds a packet to WMM queue.
631 * In disconnected state the packet is immediately dropped and the
632 * packet send completion callback is called with status failure.
634 * Otherwise, the correct RA list node is located and the packet
635 * is queued at the list tail.
638 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
641 struct mwifiex_adapter *adapter = priv->adapter;
643 struct mwifiex_ra_list_tbl *ra_list;
644 u8 ra[ETH_ALEN], tid_down;
647 if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
648 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
649 mwifiex_write_data_complete(adapter, skb, 0, -1);
655 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
657 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
659 /* In case of infra as we have already created the list during
660 association we just don't have to call get_queue_raptr, we will
661 have only 1 raptr for a tid in case of infra */
662 if (!mwifiex_queuing_ra_based(priv) &&
663 !mwifiex_is_skb_mgmt_frame(skb)) {
664 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
665 ra_list = list_first_entry(
666 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
667 struct mwifiex_ra_list_tbl, list);
671 memcpy(ra, skb->data, ETH_ALEN);
672 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
673 memset(ra, 0xff, ETH_ALEN);
674 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
678 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
679 mwifiex_write_data_complete(adapter, skb, 0, -1);
683 skb_queue_tail(&ra_list->skb_head, skb);
685 ra_list->total_pkts_size += skb->len;
686 ra_list->pkt_count++;
688 atomic_inc(&priv->wmm.tx_pkts_queued);
690 if (atomic_read(&priv->wmm.highest_queued_prio) <
691 tos_to_tid_inv[tid_down])
692 atomic_set(&priv->wmm.highest_queued_prio,
693 tos_to_tid_inv[tid_down]);
695 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
699 * This function processes the get WMM status command response from firmware.
701 * The response may contain multiple TLVs -
702 * - AC Queue status TLVs
703 * - Current WMM Parameter IE TLV
704 * - Admission Control action frame TLVs
706 * This function parses the TLVs and then calls further specific functions
707 * to process any changes in the queue prioritize or state.
709 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
710 const struct host_cmd_ds_command *resp)
712 u8 *curr = (u8 *) &resp->params.get_wmm_status;
713 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
716 struct mwifiex_ie_types_data *tlv_hdr;
717 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
718 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
719 struct mwifiex_wmm_ac_status *ac_status;
721 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
724 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
725 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
726 tlv_len = le16_to_cpu(tlv_hdr->header.len);
728 switch (le16_to_cpu(tlv_hdr->header.type)) {
729 case TLV_TYPE_WMMQSTATUS:
731 (struct mwifiex_ie_types_wmm_queue_status *)
733 dev_dbg(priv->adapter->dev,
734 "info: CMD_RESP: WMM_GET_STATUS:"
735 " QSTATUS TLV: %d, %d, %d\n",
736 tlv_wmm_qstatus->queue_index,
737 tlv_wmm_qstatus->flow_required,
738 tlv_wmm_qstatus->disabled);
740 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
742 ac_status->disabled = tlv_wmm_qstatus->disabled;
743 ac_status->flow_required =
744 tlv_wmm_qstatus->flow_required;
745 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
748 case WLAN_EID_VENDOR_SPECIFIC:
750 * Point the regular IEEE IE 2 bytes into the Marvell IE
751 * and setup the IEEE IE type and length byte fields
755 (struct ieee_types_wmm_parameter *) (curr +
757 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
758 wmm_param_ie->vend_hdr.element_id =
759 WLAN_EID_VENDOR_SPECIFIC;
761 dev_dbg(priv->adapter->dev,
762 "info: CMD_RESP: WMM_GET_STATUS:"
763 " WMM Parameter Set Count: %d\n",
764 wmm_param_ie->qos_info_bitmap &
765 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
767 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
768 wmm_ie, wmm_param_ie,
769 wmm_param_ie->vend_hdr.len + 2);
778 curr += (tlv_len + sizeof(tlv_hdr->header));
779 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
782 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
783 mwifiex_wmm_setup_ac_downgrade(priv);
789 * Callback handler from the command module to allow insertion of a WMM TLV.
791 * If the BSS we are associating to supports WMM, this function adds the
792 * required WMM Information IE to the association request command buffer in
793 * the form of a Marvell extended IEEE IE.
796 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
798 struct ieee_types_wmm_parameter *wmm_ie,
799 struct ieee80211_ht_cap *ht_cap)
801 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
813 dev_dbg(priv->adapter->dev,
814 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
815 wmm_ie->vend_hdr.element_id);
817 if ((priv->wmm_required ||
818 (ht_cap && (priv->adapter->config_bands & BAND_GN ||
819 priv->adapter->config_bands & BAND_AN))) &&
820 wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
821 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
822 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
823 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
824 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
825 le16_to_cpu(wmm_tlv->header.len));
826 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
827 memcpy((u8 *) (wmm_tlv->wmm_ie
828 + le16_to_cpu(wmm_tlv->header.len)
829 - sizeof(priv->wmm_qosinfo)),
830 &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
832 ret_len = sizeof(wmm_tlv->header)
833 + le16_to_cpu(wmm_tlv->header.len);
835 *assoc_buf += ret_len;
842 * This function computes the time delay in the driver queues for a
845 * When the packet is received at the OS/Driver interface, the current
846 * time is set in the packet structure. The difference between the present
847 * time and that received time is computed in this function and limited
848 * based on pre-compiled limits in the driver.
851 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
852 const struct sk_buff *skb)
855 struct timeval out_tstamp, in_tstamp;
858 do_gettimeofday(&out_tstamp);
859 in_tstamp = ktime_to_timeval(skb->tstamp);
861 queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
862 queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
865 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
866 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
868 * Pass max value if queue_delay is beyond the uint8 range
870 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
872 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
873 " %d ms sent to FW\n", queue_delay, ret_val);
879 * This function retrieves the highest priority RA list table pointer.
881 static struct mwifiex_ra_list_tbl *
882 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
883 struct mwifiex_private **priv, int *tid)
885 struct mwifiex_private *priv_tmp;
886 struct mwifiex_ra_list_tbl *ptr, *head;
887 struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
888 struct mwifiex_tid_tbl *tid_ptr;
894 for (j = adapter->priv_num - 1; j >= 0; --j) {
895 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
897 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
899 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
904 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
905 (struct mwifiex_bss_prio_node *)
906 &adapter->bss_prio_tbl[j].bss_prio_head) {
907 adapter->bss_prio_tbl[j].bss_prio_cur =
908 list_first_entry(&adapter->bss_prio_tbl[j]
910 struct mwifiex_bss_prio_node,
914 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
915 bssprio_head = bssprio_node;
918 priv_tmp = bssprio_node->priv;
919 hqp = &priv_tmp->wmm.highest_queued_prio;
921 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
923 tid_ptr = &(priv_tmp)->wmm.
924 tid_tbl_ptr[tos_to_tid[i]];
926 /* For non-STA ra_list_curr may be NULL */
927 if (!tid_ptr->ra_list_curr)
930 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
933 list_empty(&tid_ptr->ra_list);
934 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
940 * Always choose the next ra we transmitted
941 * last time, this way we pick the ra's in
942 * round robin fashion.
944 ptr = list_first_entry(
945 &tid_ptr->ra_list_curr->list,
946 struct mwifiex_ra_list_tbl,
950 if (ptr == (struct mwifiex_ra_list_tbl *)
953 ptr = list_first_entry(&ptr->list,
954 struct mwifiex_ra_list_tbl, list);
960 skb_queue_empty(&ptr->skb_head);
966 ptr = list_first_entry(&ptr->list,
967 struct mwifiex_ra_list_tbl,
970 (struct mwifiex_ra_list_tbl *)
972 ptr = list_first_entry(
974 struct mwifiex_ra_list_tbl,
976 } while (ptr != head);
979 /* No packet at any TID for this priv. Mark as such
980 * to skip checking TIDs for this priv (until pkt is
983 atomic_set(hqp, NO_PKT_PRIO_TID);
985 /* Get next bss priority node */
986 bssprio_node = list_first_entry(&bssprio_node->list,
987 struct mwifiex_bss_prio_node,
991 (struct mwifiex_bss_prio_node *)
992 &adapter->bss_prio_tbl[j].bss_prio_head)
993 /* Get next bss priority node */
994 bssprio_node = list_first_entry(
996 struct mwifiex_bss_prio_node,
998 } while (bssprio_node != bssprio_head);
1003 spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
1004 if (atomic_read(hqp) > i)
1006 spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
1009 *tid = tos_to_tid[i];
1015 * This function checks if 11n aggregation is possible.
1018 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1019 struct mwifiex_ra_list_tbl *ptr,
1022 int count = 0, total_size = 0;
1023 struct sk_buff *skb, *tmp;
1026 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1027 ptr->is_11n_enabled)
1028 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1030 max_amsdu_size = max_buf_size;
1032 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1033 total_size += skb->len;
1034 if (total_size >= max_amsdu_size)
1036 if (++count >= MIN_NUM_AMSDU)
1044 * This function sends a single packet to firmware for transmission.
1047 mwifiex_send_single_packet(struct mwifiex_private *priv,
1048 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1049 unsigned long ra_list_flags)
1050 __releases(&priv->wmm.ra_list_spinlock)
1052 struct sk_buff *skb, *skb_next;
1053 struct mwifiex_tx_param tx_param;
1054 struct mwifiex_adapter *adapter = priv->adapter;
1055 struct mwifiex_txinfo *tx_info;
1057 if (skb_queue_empty(&ptr->skb_head)) {
1058 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1060 dev_dbg(adapter->dev, "data: nothing to send\n");
1064 skb = skb_dequeue(&ptr->skb_head);
1066 tx_info = MWIFIEX_SKB_TXCB(skb);
1067 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1069 ptr->total_pkts_size -= skb->len;
1071 if (!skb_queue_empty(&ptr->skb_head))
1072 skb_next = skb_peek(&ptr->skb_head);
1076 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1078 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1079 sizeof(struct txpd) : 0);
1081 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1082 /* Queue the packet back at the head */
1083 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1085 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1086 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1088 mwifiex_write_data_complete(adapter, skb, 0, -1);
1092 skb_queue_tail(&ptr->skb_head, skb);
1094 ptr->total_pkts_size += skb->len;
1096 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1097 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1100 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1101 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1102 priv->wmm.packets_out[ptr_index]++;
1103 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1105 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1107 &adapter->bss_prio_tbl[priv->bss_priority]
1108 .bss_prio_cur->list,
1109 struct mwifiex_bss_prio_node,
1111 atomic_dec(&priv->wmm.tx_pkts_queued);
1112 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1118 * This function checks if the first packet in the given RA list
1119 * is already processed or not.
1122 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1123 struct mwifiex_ra_list_tbl *ptr)
1125 struct sk_buff *skb;
1126 struct mwifiex_txinfo *tx_info;
1128 if (skb_queue_empty(&ptr->skb_head))
1131 skb = skb_peek(&ptr->skb_head);
1133 tx_info = MWIFIEX_SKB_TXCB(skb);
1134 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1141 * This function sends a single processed packet to firmware for
1145 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1146 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1147 unsigned long ra_list_flags)
1148 __releases(&priv->wmm.ra_list_spinlock)
1150 struct mwifiex_tx_param tx_param;
1151 struct mwifiex_adapter *adapter = priv->adapter;
1153 struct sk_buff *skb, *skb_next;
1154 struct mwifiex_txinfo *tx_info;
1156 if (skb_queue_empty(&ptr->skb_head)) {
1157 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1162 skb = skb_dequeue(&ptr->skb_head);
1164 if (!skb_queue_empty(&ptr->skb_head))
1165 skb_next = skb_peek(&ptr->skb_head);
1169 tx_info = MWIFIEX_SKB_TXCB(skb);
1171 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1173 if (adapter->iface_type == MWIFIEX_USB) {
1174 adapter->data_sent = true;
1175 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1178 tx_param.next_pkt_len =
1179 ((skb_next) ? skb_next->len +
1180 sizeof(struct txpd) : 0);
1181 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1187 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1188 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1190 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1191 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1193 mwifiex_write_data_complete(adapter, skb, 0, -1);
1197 skb_queue_tail(&ptr->skb_head, skb);
1199 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1200 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1204 if (adapter->iface_type != MWIFIEX_PCIE)
1205 adapter->data_sent = false;
1206 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1207 adapter->dbg.num_tx_host_to_card_failure++;
1208 mwifiex_write_data_complete(adapter, skb, 0, ret);
1211 if (adapter->iface_type != MWIFIEX_PCIE)
1212 adapter->data_sent = false;
1216 if (ret != -EBUSY) {
1217 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1218 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1219 priv->wmm.packets_out[ptr_index]++;
1220 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1222 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1224 &adapter->bss_prio_tbl[priv->bss_priority]
1225 .bss_prio_cur->list,
1226 struct mwifiex_bss_prio_node,
1228 atomic_dec(&priv->wmm.tx_pkts_queued);
1229 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1235 * This function dequeues a packet from the highest priority list
1239 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1241 struct mwifiex_ra_list_tbl *ptr;
1242 struct mwifiex_private *priv = NULL;
1245 int tid_del = 0, tid = 0;
1246 unsigned long flags;
1248 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1252 tid = mwifiex_get_tid(ptr);
1254 dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1256 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1257 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1258 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1262 if (mwifiex_is_ptr_processed(priv, ptr)) {
1263 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1264 /* ra_list_spinlock has been freed in
1265 mwifiex_send_processed_packet() */
1269 if (!ptr->is_11n_enabled ||
1270 mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1271 priv->wps.session_enable ||
1272 ((priv->sec_info.wpa_enabled ||
1273 priv->sec_info.wpa2_enabled) &&
1274 !priv->wpa_is_gtk_set)) {
1275 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1276 /* ra_list_spinlock has been freed in
1277 mwifiex_send_single_packet() */
1279 if (mwifiex_is_ampdu_allowed(priv, tid) &&
1280 ptr->pkt_count > ptr->ba_packet_thr) {
1281 if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1282 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1283 BA_SETUP_INPROGRESS);
1284 mwifiex_send_addba(priv, tid, ptr->ra);
1285 } else if (mwifiex_find_stream_to_delete
1286 (priv, tid, &tid_del, ra)) {
1287 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1288 BA_SETUP_INPROGRESS);
1289 mwifiex_send_delba(priv, tid_del, ra, 1);
1292 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1293 mwifiex_is_11n_aggragation_possible(priv, ptr,
1294 adapter->tx_buf_size))
1295 mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1297 /* ra_list_spinlock has been freed in
1298 mwifiex_11n_aggregate_pkt() */
1300 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1301 /* ra_list_spinlock has been freed in
1302 mwifiex_send_single_packet() */
1308 * This function transmits the highest priority packet awaiting in the
1312 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1316 if (adapter->data_sent || adapter->tx_lock_flag)
1319 if (mwifiex_dequeue_tx_packet(adapter))
1321 } while (!mwifiex_wmm_lists_empty(adapter));