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);
114 dev_err(adapter->dev, "%s: failed to alloc ra_list\n",
118 INIT_LIST_HEAD(&ra_list->list);
119 skb_queue_head_init(&ra_list->skb_head);
121 memcpy(ra_list->ra, ra, ETH_ALEN);
123 ra_list->total_pkts_size = 0;
125 dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
131 * This function allocates and adds a RA list for all TIDs
135 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
138 struct mwifiex_ra_list_tbl *ra_list;
139 struct mwifiex_adapter *adapter = priv->adapter;
141 for (i = 0; i < MAX_NUM_TID; ++i) {
142 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
143 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
148 if (!mwifiex_queuing_ra_based(priv))
149 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
151 ra_list->is_11n_enabled = false;
153 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
154 ra_list, ra_list->is_11n_enabled);
156 list_add_tail(&ra_list->list,
157 &priv->wmm.tid_tbl_ptr[i].ra_list);
159 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
160 priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
165 * This function sets the WMM queue priorities to their default values.
167 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
169 /* Default queue priorities: VO->VI->BE->BK */
170 priv->wmm.queue_priority[0] = WMM_AC_VO;
171 priv->wmm.queue_priority[1] = WMM_AC_VI;
172 priv->wmm.queue_priority[2] = WMM_AC_BE;
173 priv->wmm.queue_priority[3] = WMM_AC_BK;
177 * This function map ACs to TIDs.
180 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
182 u8 *queue_priority = wmm->queue_priority;
185 for (i = 0; i < 4; ++i) {
186 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
187 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
190 for (i = 0; i < MAX_NUM_TID; ++i)
191 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
193 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
197 * This function initializes WMM priority queues.
200 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
201 struct ieee_types_wmm_parameter *wmm_ie)
203 u16 cw_min, avg_back_off, tmp[4];
207 if (!wmm_ie || !priv->wmm_enabled) {
208 /* WMM is not enabled, just set the defaults and return */
209 mwifiex_wmm_default_queue_priorities(priv);
213 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
214 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
215 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
216 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
219 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
220 cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap &
221 MWIFIEX_ECW_MIN)) - 1;
222 avg_back_off = (cw_min >> 1) +
223 (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap &
226 ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac].
229 priv->wmm.queue_priority[ac_idx] = ac_idx;
230 tmp[ac_idx] = avg_back_off;
232 dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
233 (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap &
234 MWIFIEX_ECW_MAX) >> 4)) - 1,
235 cw_min, avg_back_off);
236 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
240 for (i = 0; i < num_ac; i++) {
241 for (j = 1; j < num_ac - i; j++) {
242 if (tmp[j - 1] > tmp[j]) {
243 swap(tmp[j - 1], tmp[j]);
244 swap(priv->wmm.queue_priority[j - 1],
245 priv->wmm.queue_priority[j]);
246 } else if (tmp[j - 1] == tmp[j]) {
247 if (priv->wmm.queue_priority[j - 1]
248 < priv->wmm.queue_priority[j])
249 swap(priv->wmm.queue_priority[j - 1],
250 priv->wmm.queue_priority[j]);
255 mwifiex_wmm_queue_priorities_tid(&priv->wmm);
259 * This function evaluates whether or not an AC is to be downgraded.
261 * In case the AC is not enabled, the highest AC is returned that is
262 * enabled and does not require admission control.
264 static enum mwifiex_wmm_ac_e
265 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
266 enum mwifiex_wmm_ac_e eval_ac)
269 enum mwifiex_wmm_ac_e ret_ac;
270 struct mwifiex_wmm_ac_status *ac_status;
272 ac_status = &priv->wmm.ac_status[eval_ac];
274 if (!ac_status->disabled)
275 /* Okay to use this AC, its enabled */
278 /* Setup a default return value of the lowest priority */
282 * Find the highest AC that is enabled and does not require
283 * admission control. The spec disallows downgrading to an AC,
284 * which is enabled due to a completed admission control.
285 * Unadmitted traffic is not to be sent on an AC with admitted
288 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
289 ac_status = &priv->wmm.ac_status[down_ac];
291 if (!ac_status->disabled && !ac_status->flow_required)
292 /* AC is enabled and does not require admission
294 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
301 * This function downgrades WMM priority queue.
304 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
308 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
309 "BK(0), BE(1), VI(2), VO(3)\n");
311 if (!priv->wmm_enabled) {
312 /* WMM is not enabled, default priorities */
313 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
314 priv->wmm.ac_down_graded_vals[ac_val] =
315 (enum mwifiex_wmm_ac_e) ac_val;
317 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
318 priv->wmm.ac_down_graded_vals[ac_val]
319 = mwifiex_wmm_eval_downgrade_ac(priv,
320 (enum mwifiex_wmm_ac_e) ac_val);
321 dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n",
322 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
328 * This function converts the IP TOS field to an WMM AC
331 static enum mwifiex_wmm_ac_e
332 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
334 /* Map of TOS UP values to WMM AC */
335 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
345 if (tos >= ARRAY_SIZE(tos_to_ac))
348 return tos_to_ac[tos];
352 * This function evaluates a given TID and downgrades it to a lower
353 * TID if the WMM Parameter IE received from the AP indicates that the
354 * AP is disabled (due to call admission control (ACM bit). Mapping
355 * of TID to AC is taken care of internally.
358 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
360 enum mwifiex_wmm_ac_e ac, ac_down;
363 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
364 ac_down = priv->wmm.ac_down_graded_vals[ac];
366 /* Send the index to tid array, picking from the array will be
367 * taken care by dequeuing function
369 new_tid = ac_to_tid[ac_down][tid % 2];
375 * This function initializes the WMM state information and the
376 * WMM data path queues.
379 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
382 struct mwifiex_private *priv;
384 for (j = 0; j < adapter->priv_num; ++j) {
385 priv = adapter->priv[j];
389 for (i = 0; i < MAX_NUM_TID; ++i) {
390 priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
391 priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
392 priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
393 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
396 priv->aggr_prio_tbl[6].amsdu
397 = priv->aggr_prio_tbl[6].ampdu_ap
398 = priv->aggr_prio_tbl[6].ampdu_user
399 = BA_STREAM_NOT_ALLOWED;
401 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
402 = priv->aggr_prio_tbl[7].ampdu_user
403 = BA_STREAM_NOT_ALLOWED;
405 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
406 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
407 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
409 mwifiex_reset_11n_rx_seq_num(priv);
411 atomic_set(&priv->wmm.tx_pkts_queued, 0);
412 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
417 * This function checks if WMM Tx queue is empty.
420 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
423 struct mwifiex_private *priv;
425 for (i = 0; i < adapter->priv_num; ++i) {
426 priv = adapter->priv[i];
427 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
435 * This function deletes all packets in an RA list node.
437 * The packet sent completion callback handler are called with
438 * status failure, after they are dequeued to ensure proper
439 * cleanup. The RA list node itself is freed at the end.
442 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
443 struct mwifiex_ra_list_tbl *ra_list)
445 struct mwifiex_adapter *adapter = priv->adapter;
446 struct sk_buff *skb, *tmp;
448 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
449 mwifiex_write_data_complete(adapter, skb, -1);
453 * This function deletes all packets in an RA list.
455 * Each nodes in the RA list are freed individually first, and then
456 * the RA list itself is freed.
459 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
460 struct list_head *ra_list_head)
462 struct mwifiex_ra_list_tbl *ra_list;
464 list_for_each_entry(ra_list, ra_list_head, list)
465 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
469 * This function deletes all packets in all RA lists.
471 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
475 for (i = 0; i < MAX_NUM_TID; i++)
476 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
479 atomic_set(&priv->wmm.tx_pkts_queued, 0);
480 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
484 * This function deletes all route addresses from all RA lists.
486 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
488 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
491 for (i = 0; i < MAX_NUM_TID; ++i) {
492 dev_dbg(priv->adapter->dev,
493 "info: ra_list: freeing buf for tid %d\n", i);
494 list_for_each_entry_safe(ra_list, tmp_node,
495 &priv->wmm.tid_tbl_ptr[i].ra_list, list) {
496 list_del(&ra_list->list);
500 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
502 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
507 * This function cleans up the Tx and Rx queues.
510 * - All packets in RA lists
511 * - All entries in Rx reorder table
512 * - All entries in Tx BA stream table
513 * - MPA buffer (if required)
517 mwifiex_clean_txrx(struct mwifiex_private *priv)
521 mwifiex_11n_cleanup_reorder_tbl(priv);
522 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
524 mwifiex_wmm_cleanup_queues(priv);
525 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
527 if (priv->adapter->if_ops.cleanup_mpa_buf)
528 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
530 mwifiex_wmm_delete_all_ralist(priv);
531 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
533 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
537 * This function retrieves a particular RA list node, matching with the
538 * given TID and RA address.
540 static struct mwifiex_ra_list_tbl *
541 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
544 struct mwifiex_ra_list_tbl *ra_list;
546 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
548 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
556 * This function retrieves an RA list node for a given TID and
559 * If no such node is found, a new node is added first and then
562 static struct mwifiex_ra_list_tbl *
563 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
565 struct mwifiex_ra_list_tbl *ra_list;
567 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
570 mwifiex_ralist_add(priv, ra_addr);
572 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
576 * This function checks if a particular RA list node exists in a given TID
580 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
581 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
583 struct mwifiex_ra_list_tbl *rlist;
585 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
587 if (rlist == ra_list)
595 * This function adds a packet to WMM queue.
597 * In disconnected state the packet is immediately dropped and the
598 * packet send completion callback is called with status failure.
600 * Otherwise, the correct RA list node is located and the packet
601 * is queued at the list tail.
604 mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter,
607 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
608 struct mwifiex_private *priv = adapter->priv[tx_info->bss_index];
610 struct mwifiex_ra_list_tbl *ra_list;
611 u8 ra[ETH_ALEN], tid_down;
614 if (!priv->media_connected) {
615 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
616 mwifiex_write_data_complete(adapter, skb, -1);
622 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
624 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
626 /* In case of infra as we have already created the list during
627 association we just don't have to call get_queue_raptr, we will
628 have only 1 raptr for a tid in case of infra */
629 if (!mwifiex_queuing_ra_based(priv)) {
630 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
631 ra_list = list_first_entry(
632 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
633 struct mwifiex_ra_list_tbl, list);
637 memcpy(ra, skb->data, ETH_ALEN);
638 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
642 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
643 mwifiex_write_data_complete(adapter, skb, -1);
647 skb_queue_tail(&ra_list->skb_head, skb);
649 ra_list->total_pkts_size += skb->len;
651 atomic_inc(&priv->wmm.tx_pkts_queued);
653 if (atomic_read(&priv->wmm.highest_queued_prio) <
654 tos_to_tid_inv[tid_down])
655 atomic_set(&priv->wmm.highest_queued_prio,
656 tos_to_tid_inv[tid_down]);
658 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
662 * This function processes the get WMM status command response from firmware.
664 * The response may contain multiple TLVs -
665 * - AC Queue status TLVs
666 * - Current WMM Parameter IE TLV
667 * - Admission Control action frame TLVs
669 * This function parses the TLVs and then calls further specific functions
670 * to process any changes in the queue prioritize or state.
672 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
673 const struct host_cmd_ds_command *resp)
675 u8 *curr = (u8 *) &resp->params.get_wmm_status;
676 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
679 struct mwifiex_ie_types_data *tlv_hdr;
680 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
681 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
682 struct mwifiex_wmm_ac_status *ac_status;
684 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
687 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
688 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
689 tlv_len = le16_to_cpu(tlv_hdr->header.len);
691 switch (le16_to_cpu(tlv_hdr->header.type)) {
692 case TLV_TYPE_WMMQSTATUS:
694 (struct mwifiex_ie_types_wmm_queue_status *)
696 dev_dbg(priv->adapter->dev,
697 "info: CMD_RESP: WMM_GET_STATUS:"
698 " QSTATUS TLV: %d, %d, %d\n",
699 tlv_wmm_qstatus->queue_index,
700 tlv_wmm_qstatus->flow_required,
701 tlv_wmm_qstatus->disabled);
703 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
705 ac_status->disabled = tlv_wmm_qstatus->disabled;
706 ac_status->flow_required =
707 tlv_wmm_qstatus->flow_required;
708 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
711 case WLAN_EID_VENDOR_SPECIFIC:
713 * Point the regular IEEE IE 2 bytes into the Marvell IE
714 * and setup the IEEE IE type and length byte fields
718 (struct ieee_types_wmm_parameter *) (curr +
720 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
721 wmm_param_ie->vend_hdr.element_id =
722 WLAN_EID_VENDOR_SPECIFIC;
724 dev_dbg(priv->adapter->dev,
725 "info: CMD_RESP: WMM_GET_STATUS:"
726 " WMM Parameter Set Count: %d\n",
727 wmm_param_ie->qos_info_bitmap &
728 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
730 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
731 wmm_ie, wmm_param_ie,
732 wmm_param_ie->vend_hdr.len + 2);
741 curr += (tlv_len + sizeof(tlv_hdr->header));
742 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
745 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
746 mwifiex_wmm_setup_ac_downgrade(priv);
752 * Callback handler from the command module to allow insertion of a WMM TLV.
754 * If the BSS we are associating to supports WMM, this function adds the
755 * required WMM Information IE to the association request command buffer in
756 * the form of a Marvell extended IEEE IE.
759 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
761 struct ieee_types_wmm_parameter *wmm_ie,
762 struct ieee80211_ht_cap *ht_cap)
764 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
776 dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:"
778 wmm_ie->vend_hdr.element_id);
780 if ((priv->wmm_required
781 || (ht_cap && (priv->adapter->config_bands & BAND_GN
782 || priv->adapter->config_bands & BAND_AN))
784 && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
785 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
786 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
787 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
788 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
789 le16_to_cpu(wmm_tlv->header.len));
790 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
791 memcpy((u8 *) (wmm_tlv->wmm_ie
792 + le16_to_cpu(wmm_tlv->header.len)
793 - sizeof(priv->wmm_qosinfo)),
795 sizeof(priv->wmm_qosinfo));
797 ret_len = sizeof(wmm_tlv->header)
798 + le16_to_cpu(wmm_tlv->header.len);
800 *assoc_buf += ret_len;
807 * This function computes the time delay in the driver queues for a
810 * When the packet is received at the OS/Driver interface, the current
811 * time is set in the packet structure. The difference between the present
812 * time and that received time is computed in this function and limited
813 * based on pre-compiled limits in the driver.
816 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
817 const struct sk_buff *skb)
820 struct timeval out_tstamp, in_tstamp;
823 do_gettimeofday(&out_tstamp);
824 in_tstamp = ktime_to_timeval(skb->tstamp);
826 queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
827 queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
830 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
831 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
833 * Pass max value if queue_delay is beyond the uint8 range
835 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
837 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
838 " %d ms sent to FW\n", queue_delay, ret_val);
844 * This function retrieves the highest priority RA list table pointer.
846 static struct mwifiex_ra_list_tbl *
847 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
848 struct mwifiex_private **priv, int *tid)
850 struct mwifiex_private *priv_tmp;
851 struct mwifiex_ra_list_tbl *ptr, *head;
852 struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
853 struct mwifiex_tid_tbl *tid_ptr;
858 for (j = adapter->priv_num - 1; j >= 0; --j) {
859 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
861 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
863 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
868 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
869 (struct mwifiex_bss_prio_node *)
870 &adapter->bss_prio_tbl[j].bss_prio_head) {
872 list_first_entry(&adapter->bss_prio_tbl[j]
874 struct mwifiex_bss_prio_node,
876 bssprio_head = bssprio_node;
878 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
879 bssprio_head = bssprio_node;
886 priv_tmp = bssprio_node->priv;
887 hqp = &priv_tmp->wmm.highest_queued_prio;
888 lock = &priv_tmp->wmm.ra_list_spinlock;
890 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
892 tid_ptr = &(priv_tmp)->wmm.
893 tid_tbl_ptr[tos_to_tid[i]];
895 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
898 list_empty(&adapter->bss_prio_tbl[j]
900 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
906 * Always choose the next ra we transmitted
907 * last time, this way we pick the ra's in
908 * round robin fashion.
910 ptr = list_first_entry(
911 &tid_ptr->ra_list_curr->list,
912 struct mwifiex_ra_list_tbl,
916 if (ptr == (struct mwifiex_ra_list_tbl *)
919 ptr = list_first_entry(&ptr->list,
920 struct mwifiex_ra_list_tbl, list);
926 skb_queue_empty(&ptr->skb_head);
927 if (!is_list_empty) {
928 spin_lock_irqsave(lock, flags);
929 if (atomic_read(hqp) > i)
931 spin_unlock_irqrestore(lock,
934 *tid = tos_to_tid[i];
938 ptr = list_first_entry(&ptr->list,
939 struct mwifiex_ra_list_tbl,
942 (struct mwifiex_ra_list_tbl *)
944 ptr = list_first_entry(
946 struct mwifiex_ra_list_tbl,
948 } while (ptr != head);
951 /* No packet at any TID for this priv. Mark as such
952 * to skip checking TIDs for this priv (until pkt is
955 atomic_set(hqp, NO_PKT_PRIO_TID);
957 /* Get next bss priority node */
958 bssprio_node = list_first_entry(&bssprio_node->list,
959 struct mwifiex_bss_prio_node,
963 (struct mwifiex_bss_prio_node *)
964 &adapter->bss_prio_tbl[j].bss_prio_head)
965 /* Get next bss priority node */
966 bssprio_node = list_first_entry(
968 struct mwifiex_bss_prio_node,
970 } while (bssprio_node != bssprio_head);
976 * This function gets the number of packets in the Tx queue of a
977 * particular RA list.
980 mwifiex_num_pkts_in_txq(struct mwifiex_private *priv,
981 struct mwifiex_ra_list_tbl *ptr, int max_buf_size)
983 int count = 0, total_size = 0;
984 struct sk_buff *skb, *tmp;
986 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
987 total_size += skb->len;
988 if (total_size < max_buf_size)
998 * This function sends a single packet to firmware for transmission.
1001 mwifiex_send_single_packet(struct mwifiex_private *priv,
1002 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1003 unsigned long ra_list_flags)
1004 __releases(&priv->wmm.ra_list_spinlock)
1006 struct sk_buff *skb, *skb_next;
1007 struct mwifiex_tx_param tx_param;
1008 struct mwifiex_adapter *adapter = priv->adapter;
1009 struct mwifiex_txinfo *tx_info;
1011 if (skb_queue_empty(&ptr->skb_head)) {
1012 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1014 dev_dbg(adapter->dev, "data: nothing to send\n");
1018 skb = skb_dequeue(&ptr->skb_head);
1020 tx_info = MWIFIEX_SKB_TXCB(skb);
1021 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1023 ptr->total_pkts_size -= skb->len;
1025 if (!skb_queue_empty(&ptr->skb_head))
1026 skb_next = skb_peek(&ptr->skb_head);
1030 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1032 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1033 sizeof(struct txpd) : 0);
1035 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1036 /* Queue the packet back at the head */
1037 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1039 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1040 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1042 mwifiex_write_data_complete(adapter, skb, -1);
1046 skb_queue_tail(&ptr->skb_head, skb);
1048 ptr->total_pkts_size += skb->len;
1049 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1050 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1053 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1054 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1055 priv->wmm.packets_out[ptr_index]++;
1056 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1058 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1060 &adapter->bss_prio_tbl[priv->bss_priority]
1061 .bss_prio_cur->list,
1062 struct mwifiex_bss_prio_node,
1064 atomic_dec(&priv->wmm.tx_pkts_queued);
1065 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1071 * This function checks if the first packet in the given RA list
1072 * is already processed or not.
1075 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1076 struct mwifiex_ra_list_tbl *ptr)
1078 struct sk_buff *skb;
1079 struct mwifiex_txinfo *tx_info;
1081 if (skb_queue_empty(&ptr->skb_head))
1084 skb = skb_peek(&ptr->skb_head);
1086 tx_info = MWIFIEX_SKB_TXCB(skb);
1087 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1094 * This function sends a single processed packet to firmware for
1098 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1099 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1100 unsigned long ra_list_flags)
1101 __releases(&priv->wmm.ra_list_spinlock)
1103 struct mwifiex_tx_param tx_param;
1104 struct mwifiex_adapter *adapter = priv->adapter;
1106 struct sk_buff *skb, *skb_next;
1107 struct mwifiex_txinfo *tx_info;
1109 if (skb_queue_empty(&ptr->skb_head)) {
1110 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1115 skb = skb_dequeue(&ptr->skb_head);
1117 if (!skb_queue_empty(&ptr->skb_head))
1118 skb_next = skb_peek(&ptr->skb_head);
1122 tx_info = MWIFIEX_SKB_TXCB(skb);
1124 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1125 tx_param.next_pkt_len =
1126 ((skb_next) ? skb_next->len +
1127 sizeof(struct txpd) : 0);
1128 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1129 skb->data, skb->len, &tx_param);
1132 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1133 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1135 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1136 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1138 mwifiex_write_data_complete(adapter, skb, -1);
1142 skb_queue_tail(&ptr->skb_head, skb);
1144 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1145 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1149 adapter->data_sent = false;
1150 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1151 adapter->dbg.num_tx_host_to_card_failure++;
1152 mwifiex_write_data_complete(adapter, skb, ret);
1155 adapter->data_sent = false;
1159 if (ret != -EBUSY) {
1160 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1161 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1162 priv->wmm.packets_out[ptr_index]++;
1163 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1165 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1167 &adapter->bss_prio_tbl[priv->bss_priority]
1168 .bss_prio_cur->list,
1169 struct mwifiex_bss_prio_node,
1171 atomic_dec(&priv->wmm.tx_pkts_queued);
1172 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1178 * This function dequeues a packet from the highest priority list
1182 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1184 struct mwifiex_ra_list_tbl *ptr;
1185 struct mwifiex_private *priv = NULL;
1188 int tid_del = 0, tid = 0;
1189 unsigned long flags;
1191 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1195 tid = mwifiex_get_tid(ptr);
1197 dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1199 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1200 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1201 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1205 if (mwifiex_is_ptr_processed(priv, ptr)) {
1206 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1207 /* ra_list_spinlock has been freed in
1208 mwifiex_send_processed_packet() */
1212 if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid)
1213 || ((priv->sec_info.wpa_enabled
1214 || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set)
1216 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1217 /* ra_list_spinlock has been freed in
1218 mwifiex_send_single_packet() */
1220 if (mwifiex_is_ampdu_allowed(priv, tid)) {
1221 if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1222 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1224 BA_STREAM_SETUP_INPROGRESS);
1225 mwifiex_send_addba(priv, tid, ptr->ra);
1226 } else if (mwifiex_find_stream_to_delete
1227 (priv, tid, &tid_del, ra)) {
1228 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1230 BA_STREAM_SETUP_INPROGRESS);
1231 mwifiex_send_delba(priv, tid_del, ra, 1);
1234 /* Minimum number of AMSDU */
1235 #define MIN_NUM_AMSDU 2
1236 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1237 (mwifiex_num_pkts_in_txq(priv, ptr, 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));