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);
198 * This function sets the WMM queue priorities to their default values.
200 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
202 /* Default queue priorities: VO->VI->BE->BK */
203 priv->wmm.queue_priority[0] = WMM_AC_VO;
204 priv->wmm.queue_priority[1] = WMM_AC_VI;
205 priv->wmm.queue_priority[2] = WMM_AC_BE;
206 priv->wmm.queue_priority[3] = WMM_AC_BK;
210 * This function map ACs to TIDs.
213 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
215 u8 *queue_priority = wmm->queue_priority;
218 for (i = 0; i < 4; ++i) {
219 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
220 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
223 for (i = 0; i < MAX_NUM_TID; ++i)
224 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
226 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
230 * This function initializes WMM priority queues.
233 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
234 struct ieee_types_wmm_parameter *wmm_ie)
236 u16 cw_min, avg_back_off, tmp[4];
240 if (!wmm_ie || !priv->wmm_enabled) {
241 /* WMM is not enabled, just set the defaults and return */
242 mwifiex_wmm_default_queue_priorities(priv);
246 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
247 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
248 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
249 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
252 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
253 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
254 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
255 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
256 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
258 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
259 priv->wmm.queue_priority[ac_idx] = ac_idx;
260 tmp[ac_idx] = avg_back_off;
262 dev_dbg(priv->adapter->dev,
263 "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
264 (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
265 cw_min, avg_back_off);
266 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
270 for (i = 0; i < num_ac; i++) {
271 for (j = 1; j < num_ac - i; j++) {
272 if (tmp[j - 1] > tmp[j]) {
273 swap(tmp[j - 1], tmp[j]);
274 swap(priv->wmm.queue_priority[j - 1],
275 priv->wmm.queue_priority[j]);
276 } else if (tmp[j - 1] == tmp[j]) {
277 if (priv->wmm.queue_priority[j - 1]
278 < priv->wmm.queue_priority[j])
279 swap(priv->wmm.queue_priority[j - 1],
280 priv->wmm.queue_priority[j]);
285 mwifiex_wmm_queue_priorities_tid(&priv->wmm);
289 * This function evaluates whether or not an AC is to be downgraded.
291 * In case the AC is not enabled, the highest AC is returned that is
292 * enabled and does not require admission control.
294 static enum mwifiex_wmm_ac_e
295 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
296 enum mwifiex_wmm_ac_e eval_ac)
299 enum mwifiex_wmm_ac_e ret_ac;
300 struct mwifiex_wmm_ac_status *ac_status;
302 ac_status = &priv->wmm.ac_status[eval_ac];
304 if (!ac_status->disabled)
305 /* Okay to use this AC, its enabled */
308 /* Setup a default return value of the lowest priority */
312 * Find the highest AC that is enabled and does not require
313 * admission control. The spec disallows downgrading to an AC,
314 * which is enabled due to a completed admission control.
315 * Unadmitted traffic is not to be sent on an AC with admitted
318 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
319 ac_status = &priv->wmm.ac_status[down_ac];
321 if (!ac_status->disabled && !ac_status->flow_required)
322 /* AC is enabled and does not require admission
324 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
331 * This function downgrades WMM priority queue.
334 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
338 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
339 "BK(0), BE(1), VI(2), VO(3)\n");
341 if (!priv->wmm_enabled) {
342 /* WMM is not enabled, default priorities */
343 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
344 priv->wmm.ac_down_graded_vals[ac_val] =
345 (enum mwifiex_wmm_ac_e) ac_val;
347 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
348 priv->wmm.ac_down_graded_vals[ac_val]
349 = mwifiex_wmm_eval_downgrade_ac(priv,
350 (enum mwifiex_wmm_ac_e) ac_val);
351 dev_dbg(priv->adapter->dev,
352 "info: WMM: AC PRIO %d maps to %d\n",
353 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
359 * This function converts the IP TOS field to an WMM AC
362 static enum mwifiex_wmm_ac_e
363 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
365 /* Map of TOS UP values to WMM AC */
366 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
376 if (tos >= ARRAY_SIZE(tos_to_ac))
379 return tos_to_ac[tos];
383 * This function evaluates a given TID and downgrades it to a lower
384 * TID if the WMM Parameter IE received from the AP indicates that the
385 * AP is disabled (due to call admission control (ACM bit). Mapping
386 * of TID to AC is taken care of internally.
389 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
391 enum mwifiex_wmm_ac_e ac, ac_down;
394 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
395 ac_down = priv->wmm.ac_down_graded_vals[ac];
397 /* Send the index to tid array, picking from the array will be
398 * taken care by dequeuing function
400 new_tid = ac_to_tid[ac_down][tid % 2];
406 * This function initializes the WMM state information and the
407 * WMM data path queues.
410 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
413 struct mwifiex_private *priv;
415 for (j = 0; j < adapter->priv_num; ++j) {
416 priv = adapter->priv[j];
420 for (i = 0; i < MAX_NUM_TID; ++i) {
421 priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
422 priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
423 priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
426 priv->aggr_prio_tbl[6].amsdu
427 = priv->aggr_prio_tbl[6].ampdu_ap
428 = priv->aggr_prio_tbl[6].ampdu_user
429 = BA_STREAM_NOT_ALLOWED;
431 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
432 = priv->aggr_prio_tbl[7].ampdu_user
433 = BA_STREAM_NOT_ALLOWED;
435 mwifiex_set_ba_params(priv);
436 mwifiex_reset_11n_rx_seq_num(priv);
438 atomic_set(&priv->wmm.tx_pkts_queued, 0);
439 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
444 * This function checks if WMM Tx queue is empty.
447 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
450 struct mwifiex_private *priv;
452 for (i = 0; i < adapter->priv_num; ++i) {
453 priv = adapter->priv[i];
454 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
462 * This function deletes all packets in an RA list node.
464 * The packet sent completion callback handler are called with
465 * status failure, after they are dequeued to ensure proper
466 * cleanup. The RA list node itself is freed at the end.
469 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
470 struct mwifiex_ra_list_tbl *ra_list)
472 struct mwifiex_adapter *adapter = priv->adapter;
473 struct sk_buff *skb, *tmp;
475 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
476 mwifiex_write_data_complete(adapter, skb, 0, -1);
480 * This function deletes all packets in an RA list.
482 * Each nodes in the RA list are freed individually first, and then
483 * the RA list itself is freed.
486 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
487 struct list_head *ra_list_head)
489 struct mwifiex_ra_list_tbl *ra_list;
491 list_for_each_entry(ra_list, ra_list_head, list)
492 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
496 * This function deletes all packets in all RA lists.
498 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
502 for (i = 0; i < MAX_NUM_TID; i++)
503 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
506 atomic_set(&priv->wmm.tx_pkts_queued, 0);
507 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
511 * This function deletes all route addresses from all RA lists.
513 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
515 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
518 for (i = 0; i < MAX_NUM_TID; ++i) {
519 dev_dbg(priv->adapter->dev,
520 "info: ra_list: freeing buf for tid %d\n", i);
521 list_for_each_entry_safe(ra_list, tmp_node,
522 &priv->wmm.tid_tbl_ptr[i].ra_list,
524 list_del(&ra_list->list);
528 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
533 * This function cleans up the Tx and Rx queues.
536 * - All packets in RA lists
537 * - All entries in Rx reorder table
538 * - All entries in Tx BA stream table
539 * - MPA buffer (if required)
543 mwifiex_clean_txrx(struct mwifiex_private *priv)
547 mwifiex_11n_cleanup_reorder_tbl(priv);
548 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
550 mwifiex_wmm_cleanup_queues(priv);
551 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
553 if (priv->adapter->if_ops.cleanup_mpa_buf)
554 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
556 mwifiex_wmm_delete_all_ralist(priv);
557 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
559 if (priv->adapter->if_ops.clean_pcie_ring)
560 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
561 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
565 * This function retrieves a particular RA list node, matching with the
566 * given TID and RA address.
568 static struct mwifiex_ra_list_tbl *
569 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
572 struct mwifiex_ra_list_tbl *ra_list;
574 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
576 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
584 * This function retrieves an RA list node for a given TID and
587 * If no such node is found, a new node is added first and then
590 static struct mwifiex_ra_list_tbl *
591 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
593 struct mwifiex_ra_list_tbl *ra_list;
595 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
598 mwifiex_ralist_add(priv, ra_addr);
600 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
604 * This function checks if a particular RA list node exists in a given TID
608 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
609 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
611 struct mwifiex_ra_list_tbl *rlist;
613 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
615 if (rlist == ra_list)
623 * This function adds a packet to WMM queue.
625 * In disconnected state the packet is immediately dropped and the
626 * packet send completion callback is called with status failure.
628 * Otherwise, the correct RA list node is located and the packet
629 * is queued at the list tail.
632 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
635 struct mwifiex_adapter *adapter = priv->adapter;
637 struct mwifiex_ra_list_tbl *ra_list;
638 u8 ra[ETH_ALEN], tid_down;
641 if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
642 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
643 mwifiex_write_data_complete(adapter, skb, 0, -1);
649 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
651 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
653 /* In case of infra as we have already created the list during
654 association we just don't have to call get_queue_raptr, we will
655 have only 1 raptr for a tid in case of infra */
656 if (!mwifiex_queuing_ra_based(priv) &&
657 !mwifiex_is_skb_mgmt_frame(skb)) {
658 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
659 ra_list = list_first_entry(
660 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
661 struct mwifiex_ra_list_tbl, list);
665 memcpy(ra, skb->data, ETH_ALEN);
666 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
667 memset(ra, 0xff, ETH_ALEN);
668 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
672 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
673 mwifiex_write_data_complete(adapter, skb, 0, -1);
677 skb_queue_tail(&ra_list->skb_head, skb);
679 ra_list->total_pkts_size += skb->len;
680 ra_list->pkt_count++;
682 if (atomic_read(&priv->wmm.highest_queued_prio) <
683 tos_to_tid_inv[tid_down])
684 atomic_set(&priv->wmm.highest_queued_prio,
685 tos_to_tid_inv[tid_down]);
687 atomic_inc(&priv->wmm.tx_pkts_queued);
689 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
693 * This function processes the get WMM status command response from firmware.
695 * The response may contain multiple TLVs -
696 * - AC Queue status TLVs
697 * - Current WMM Parameter IE TLV
698 * - Admission Control action frame TLVs
700 * This function parses the TLVs and then calls further specific functions
701 * to process any changes in the queue prioritize or state.
703 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
704 const struct host_cmd_ds_command *resp)
706 u8 *curr = (u8 *) &resp->params.get_wmm_status;
707 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
710 struct mwifiex_ie_types_data *tlv_hdr;
711 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
712 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
713 struct mwifiex_wmm_ac_status *ac_status;
715 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
718 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
719 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
720 tlv_len = le16_to_cpu(tlv_hdr->header.len);
722 switch (le16_to_cpu(tlv_hdr->header.type)) {
723 case TLV_TYPE_WMMQSTATUS:
725 (struct mwifiex_ie_types_wmm_queue_status *)
727 dev_dbg(priv->adapter->dev,
728 "info: CMD_RESP: WMM_GET_STATUS:"
729 " QSTATUS TLV: %d, %d, %d\n",
730 tlv_wmm_qstatus->queue_index,
731 tlv_wmm_qstatus->flow_required,
732 tlv_wmm_qstatus->disabled);
734 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
736 ac_status->disabled = tlv_wmm_qstatus->disabled;
737 ac_status->flow_required =
738 tlv_wmm_qstatus->flow_required;
739 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
742 case WLAN_EID_VENDOR_SPECIFIC:
744 * Point the regular IEEE IE 2 bytes into the Marvell IE
745 * and setup the IEEE IE type and length byte fields
749 (struct ieee_types_wmm_parameter *) (curr +
751 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
752 wmm_param_ie->vend_hdr.element_id =
753 WLAN_EID_VENDOR_SPECIFIC;
755 dev_dbg(priv->adapter->dev,
756 "info: CMD_RESP: WMM_GET_STATUS:"
757 " WMM Parameter Set Count: %d\n",
758 wmm_param_ie->qos_info_bitmap &
759 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
761 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
762 wmm_ie, wmm_param_ie,
763 wmm_param_ie->vend_hdr.len + 2);
772 curr += (tlv_len + sizeof(tlv_hdr->header));
773 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
776 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
777 mwifiex_wmm_setup_ac_downgrade(priv);
783 * Callback handler from the command module to allow insertion of a WMM TLV.
785 * If the BSS we are associating to supports WMM, this function adds the
786 * required WMM Information IE to the association request command buffer in
787 * the form of a Marvell extended IEEE IE.
790 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
792 struct ieee_types_wmm_parameter *wmm_ie,
793 struct ieee80211_ht_cap *ht_cap)
795 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
807 dev_dbg(priv->adapter->dev,
808 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
809 wmm_ie->vend_hdr.element_id);
811 if ((priv->wmm_required ||
812 (ht_cap && (priv->adapter->config_bands & BAND_GN ||
813 priv->adapter->config_bands & BAND_AN))) &&
814 wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
815 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
816 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
817 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
818 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
819 le16_to_cpu(wmm_tlv->header.len));
820 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
821 memcpy((u8 *) (wmm_tlv->wmm_ie
822 + le16_to_cpu(wmm_tlv->header.len)
823 - sizeof(priv->wmm_qosinfo)),
824 &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
826 ret_len = sizeof(wmm_tlv->header)
827 + le16_to_cpu(wmm_tlv->header.len);
829 *assoc_buf += ret_len;
836 * This function computes the time delay in the driver queues for a
839 * When the packet is received at the OS/Driver interface, the current
840 * time is set in the packet structure. The difference between the present
841 * time and that received time is computed in this function and limited
842 * based on pre-compiled limits in the driver.
845 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
846 const struct sk_buff *skb)
849 struct timeval out_tstamp, in_tstamp;
852 do_gettimeofday(&out_tstamp);
853 in_tstamp = ktime_to_timeval(skb->tstamp);
855 queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
856 queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
859 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
860 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
862 * Pass max value if queue_delay is beyond the uint8 range
864 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
866 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
867 " %d ms sent to FW\n", queue_delay, ret_val);
873 * This function retrieves the highest priority RA list table pointer.
875 static struct mwifiex_ra_list_tbl *
876 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
877 struct mwifiex_private **priv, int *tid)
879 struct mwifiex_private *priv_tmp;
880 struct mwifiex_ra_list_tbl *ptr;
881 struct mwifiex_tid_tbl *tid_ptr;
883 unsigned long flags_bss, flags_ra;
886 /* check the BSS with highest priority first */
887 for (j = adapter->priv_num - 1; j >= 0; --j) {
888 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
891 /* iterate over BSS with the equal priority */
892 list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
893 &adapter->bss_prio_tbl[j].bss_prio_head,
896 priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv;
898 if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0)
901 /* iterate over the WMM queues of the BSS */
902 hqp = &priv_tmp->wmm.highest_queued_prio;
903 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
905 spin_lock_irqsave(&priv_tmp->wmm.
906 ra_list_spinlock, flags_ra);
908 tid_ptr = &(priv_tmp)->wmm.
909 tid_tbl_ptr[tos_to_tid[i]];
911 /* iterate over receiver addresses */
912 list_for_each_entry(ptr, &tid_ptr->ra_list,
915 if (!skb_queue_empty(&ptr->skb_head))
916 /* holds both locks */
920 spin_unlock_irqrestore(&priv_tmp->wmm.
926 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
933 /* holds bss_prio_lock / ra_list_spinlock */
934 if (atomic_read(hqp) > i)
936 spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra);
937 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
941 *tid = tos_to_tid[i];
946 /* This functions rotates ra and bss lists so packets are picked round robin.
948 * After a packet is successfully transmitted, rotate the ra list, so the ra
949 * next to the one transmitted, will come first in the list. This way we pick
950 * the ra' in a round robin fashion. Same applies to bss nodes of equal
953 * Function also increments wmm.packets_out counter.
955 void mwifiex_rotate_priolists(struct mwifiex_private *priv,
956 struct mwifiex_ra_list_tbl *ra,
959 struct mwifiex_adapter *adapter = priv->adapter;
960 struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
961 struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid];
964 spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
966 * dirty trick: we remove 'head' temporarily and reinsert it after
967 * curr bss node. imagine list to stay fixed while head is moved
969 list_move(&tbl[priv->bss_priority].bss_prio_head,
970 &tbl[priv->bss_priority].bss_prio_cur->list);
971 spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
973 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
974 if (mwifiex_is_ralist_valid(priv, ra, tid)) {
975 priv->wmm.packets_out[tid]++;
977 list_move(&tid_ptr->ra_list, &ra->list);
979 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
983 * This function checks if 11n aggregation is possible.
986 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
987 struct mwifiex_ra_list_tbl *ptr,
990 int count = 0, total_size = 0;
991 struct sk_buff *skb, *tmp;
994 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
996 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
998 max_amsdu_size = max_buf_size;
1000 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1001 total_size += skb->len;
1002 if (total_size >= max_amsdu_size)
1004 if (++count >= MIN_NUM_AMSDU)
1012 * This function sends a single packet to firmware for transmission.
1015 mwifiex_send_single_packet(struct mwifiex_private *priv,
1016 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1017 unsigned long ra_list_flags)
1018 __releases(&priv->wmm.ra_list_spinlock)
1020 struct sk_buff *skb, *skb_next;
1021 struct mwifiex_tx_param tx_param;
1022 struct mwifiex_adapter *adapter = priv->adapter;
1023 struct mwifiex_txinfo *tx_info;
1025 if (skb_queue_empty(&ptr->skb_head)) {
1026 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1028 dev_dbg(adapter->dev, "data: nothing to send\n");
1032 skb = skb_dequeue(&ptr->skb_head);
1034 tx_info = MWIFIEX_SKB_TXCB(skb);
1035 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1037 ptr->total_pkts_size -= skb->len;
1039 if (!skb_queue_empty(&ptr->skb_head))
1040 skb_next = skb_peek(&ptr->skb_head);
1044 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1046 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1047 sizeof(struct txpd) : 0);
1049 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1050 /* Queue the packet back at the head */
1051 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1053 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1054 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1056 mwifiex_write_data_complete(adapter, skb, 0, -1);
1060 skb_queue_tail(&ptr->skb_head, skb);
1062 ptr->total_pkts_size += skb->len;
1064 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1065 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1068 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1069 atomic_dec(&priv->wmm.tx_pkts_queued);
1074 * This function checks if the first packet in the given RA list
1075 * is already processed or not.
1078 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1079 struct mwifiex_ra_list_tbl *ptr)
1081 struct sk_buff *skb;
1082 struct mwifiex_txinfo *tx_info;
1084 if (skb_queue_empty(&ptr->skb_head))
1087 skb = skb_peek(&ptr->skb_head);
1089 tx_info = MWIFIEX_SKB_TXCB(skb);
1090 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1097 * This function sends a single processed packet to firmware for
1101 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1102 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1103 unsigned long ra_list_flags)
1104 __releases(&priv->wmm.ra_list_spinlock)
1106 struct mwifiex_tx_param tx_param;
1107 struct mwifiex_adapter *adapter = priv->adapter;
1109 struct sk_buff *skb, *skb_next;
1110 struct mwifiex_txinfo *tx_info;
1112 if (skb_queue_empty(&ptr->skb_head)) {
1113 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1118 skb = skb_dequeue(&ptr->skb_head);
1120 if (!skb_queue_empty(&ptr->skb_head))
1121 skb_next = skb_peek(&ptr->skb_head);
1125 tx_info = MWIFIEX_SKB_TXCB(skb);
1127 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1129 if (adapter->iface_type == MWIFIEX_USB) {
1130 adapter->data_sent = true;
1131 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1134 tx_param.next_pkt_len =
1135 ((skb_next) ? skb_next->len +
1136 sizeof(struct txpd) : 0);
1137 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1143 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1144 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1146 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1147 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1149 mwifiex_write_data_complete(adapter, skb, 0, -1);
1153 skb_queue_tail(&ptr->skb_head, skb);
1155 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1156 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1160 if (adapter->iface_type != MWIFIEX_PCIE)
1161 adapter->data_sent = false;
1162 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1163 adapter->dbg.num_tx_host_to_card_failure++;
1164 mwifiex_write_data_complete(adapter, skb, 0, ret);
1167 if (adapter->iface_type != MWIFIEX_PCIE)
1168 adapter->data_sent = false;
1172 if (ret != -EBUSY) {
1173 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1174 atomic_dec(&priv->wmm.tx_pkts_queued);
1179 * This function dequeues a packet from the highest priority list
1183 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1185 struct mwifiex_ra_list_tbl *ptr;
1186 struct mwifiex_private *priv = NULL;
1189 int tid_del = 0, tid = 0;
1190 unsigned long flags;
1192 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1196 tid = mwifiex_get_tid(ptr);
1198 dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1200 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1201 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1202 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1206 if (mwifiex_is_ptr_processed(priv, ptr)) {
1207 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1208 /* ra_list_spinlock has been freed in
1209 mwifiex_send_processed_packet() */
1213 if (!ptr->is_11n_enabled ||
1214 mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1215 priv->wps.session_enable ||
1216 ((priv->sec_info.wpa_enabled ||
1217 priv->sec_info.wpa2_enabled) &&
1218 !priv->wpa_is_gtk_set)) {
1219 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1220 /* ra_list_spinlock has been freed in
1221 mwifiex_send_single_packet() */
1223 if (mwifiex_is_ampdu_allowed(priv, tid) &&
1224 ptr->pkt_count > ptr->ba_packet_thr) {
1225 if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1226 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1227 BA_SETUP_INPROGRESS);
1228 mwifiex_send_addba(priv, tid, ptr->ra);
1229 } else if (mwifiex_find_stream_to_delete
1230 (priv, tid, &tid_del, ra)) {
1231 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1232 BA_SETUP_INPROGRESS);
1233 mwifiex_send_delba(priv, tid_del, ra, 1);
1236 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1237 mwifiex_is_11n_aggragation_possible(priv, ptr,
1238 adapter->tx_buf_size))
1239 mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1241 /* ra_list_spinlock has been freed in
1242 mwifiex_11n_aggregate_pkt() */
1244 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1245 /* ra_list_spinlock has been freed in
1246 mwifiex_send_single_packet() */
1252 * This function transmits the highest priority packet awaiting in the
1256 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1260 if (adapter->data_sent || adapter->tx_lock_flag)
1263 if (mwifiex_dequeue_tx_packet(adapter))
1265 } while (!mwifiex_wmm_lists_empty(adapter));