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_private *priv,
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];
192 * This function initializes WMM priority queues.
195 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
196 struct ieee_types_wmm_parameter *wmm_ie)
198 u16 cw_min, avg_back_off, tmp[4];
202 if (!wmm_ie || !priv->wmm_enabled) {
203 /* WMM is not enabled, just set the defaults and return */
204 mwifiex_wmm_default_queue_priorities(priv);
208 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
209 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
210 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
211 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
214 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
215 cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap &
216 MWIFIEX_ECW_MIN)) - 1;
217 avg_back_off = (cw_min >> 1) +
218 (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap &
221 ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac].
224 priv->wmm.queue_priority[ac_idx] = ac_idx;
225 tmp[ac_idx] = avg_back_off;
227 dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
228 (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap &
229 MWIFIEX_ECW_MAX) >> 4)) - 1,
230 cw_min, avg_back_off);
231 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
235 for (i = 0; i < num_ac; i++) {
236 for (j = 1; j < num_ac - i; j++) {
237 if (tmp[j - 1] > tmp[j]) {
238 swap(tmp[j - 1], tmp[j]);
239 swap(priv->wmm.queue_priority[j - 1],
240 priv->wmm.queue_priority[j]);
241 } else if (tmp[j - 1] == tmp[j]) {
242 if (priv->wmm.queue_priority[j - 1]
243 < priv->wmm.queue_priority[j])
244 swap(priv->wmm.queue_priority[j - 1],
245 priv->wmm.queue_priority[j]);
250 mwifiex_wmm_queue_priorities_tid(priv, priv->wmm.queue_priority);
254 * This function evaluates whether or not an AC is to be downgraded.
256 * In case the AC is not enabled, the highest AC is returned that is
257 * enabled and does not require admission control.
259 static enum mwifiex_wmm_ac_e
260 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
261 enum mwifiex_wmm_ac_e eval_ac)
264 enum mwifiex_wmm_ac_e ret_ac;
265 struct mwifiex_wmm_ac_status *ac_status;
267 ac_status = &priv->wmm.ac_status[eval_ac];
269 if (!ac_status->disabled)
270 /* Okay to use this AC, its enabled */
273 /* Setup a default return value of the lowest priority */
277 * Find the highest AC that is enabled and does not require
278 * admission control. The spec disallows downgrading to an AC,
279 * which is enabled due to a completed admission control.
280 * Unadmitted traffic is not to be sent on an AC with admitted
283 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
284 ac_status = &priv->wmm.ac_status[down_ac];
286 if (!ac_status->disabled && !ac_status->flow_required)
287 /* AC is enabled and does not require admission
289 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
296 * This function downgrades WMM priority queue.
299 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
303 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
304 "BK(0), BE(1), VI(2), VO(3)\n");
306 if (!priv->wmm_enabled) {
307 /* WMM is not enabled, default priorities */
308 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
309 priv->wmm.ac_down_graded_vals[ac_val] =
310 (enum mwifiex_wmm_ac_e) ac_val;
312 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
313 priv->wmm.ac_down_graded_vals[ac_val]
314 = mwifiex_wmm_eval_downgrade_ac(priv,
315 (enum mwifiex_wmm_ac_e) ac_val);
316 dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n",
317 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
323 * This function converts the IP TOS field to an WMM AC
326 static enum mwifiex_wmm_ac_e
327 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
329 /* Map of TOS UP values to WMM AC */
330 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
340 if (tos >= ARRAY_SIZE(tos_to_ac))
343 return tos_to_ac[tos];
347 * This function evaluates a given TID and downgrades it to a lower
348 * TID if the WMM Parameter IE received from the AP indicates that the
349 * AP is disabled (due to call admission control (ACM bit). Mapping
350 * of TID to AC is taken care of internally.
353 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
355 enum mwifiex_wmm_ac_e ac, ac_down;
358 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
359 ac_down = priv->wmm.ac_down_graded_vals[ac];
361 /* Send the index to tid array, picking from the array will be
362 * taken care by dequeuing function
364 new_tid = ac_to_tid[ac_down][tid % 2];
370 * This function initializes the WMM state information and the
371 * WMM data path queues.
374 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
377 struct mwifiex_private *priv;
379 for (j = 0; j < adapter->priv_num; ++j) {
380 priv = adapter->priv[j];
384 for (i = 0; i < MAX_NUM_TID; ++i) {
385 priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
386 priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
387 priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
388 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
391 priv->aggr_prio_tbl[6].amsdu
392 = priv->aggr_prio_tbl[6].ampdu_ap
393 = priv->aggr_prio_tbl[6].ampdu_user
394 = BA_STREAM_NOT_ALLOWED;
396 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
397 = priv->aggr_prio_tbl[7].ampdu_user
398 = BA_STREAM_NOT_ALLOWED;
400 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
401 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
402 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
407 * This function checks if WMM Tx queue is empty.
410 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
413 struct mwifiex_private *priv;
415 for (j = 0; j < adapter->priv_num; ++j) {
416 priv = adapter->priv[j];
418 for (i = 0; i < MAX_NUM_TID; i++)
419 if (!mwifiex_wmm_is_ra_list_empty(adapter,
420 &priv->wmm.tid_tbl_ptr[i].ra_list))
429 * This function deletes all packets in an RA list node.
431 * The packet sent completion callback handler are called with
432 * status failure, after they are dequeued to ensure proper
433 * cleanup. The RA list node itself is freed at the end.
436 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
437 struct mwifiex_ra_list_tbl *ra_list)
439 struct mwifiex_adapter *adapter = priv->adapter;
440 struct sk_buff *skb, *tmp;
442 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
443 mwifiex_write_data_complete(adapter, skb, -1);
447 * This function deletes all packets in an RA list.
449 * Each nodes in the RA list are freed individually first, and then
450 * the RA list itself is freed.
453 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
454 struct list_head *ra_list_head)
456 struct mwifiex_ra_list_tbl *ra_list;
458 list_for_each_entry(ra_list, ra_list_head, list)
459 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
463 * This function deletes all packets in all RA lists.
465 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
469 for (i = 0; i < MAX_NUM_TID; i++)
470 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
475 * This function deletes all route addresses from all RA lists.
477 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
479 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
482 for (i = 0; i < MAX_NUM_TID; ++i) {
483 dev_dbg(priv->adapter->dev,
484 "info: ra_list: freeing buf for tid %d\n", i);
485 list_for_each_entry_safe(ra_list, tmp_node,
486 &priv->wmm.tid_tbl_ptr[i].ra_list, list) {
487 list_del(&ra_list->list);
491 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
493 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
498 * This function cleans up the Tx and Rx queues.
501 * - All packets in RA lists
502 * - All entries in Rx reorder table
503 * - All entries in Tx BA stream table
504 * - MPA buffer (if required)
508 mwifiex_clean_txrx(struct mwifiex_private *priv)
512 mwifiex_11n_cleanup_reorder_tbl(priv);
513 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
515 mwifiex_wmm_cleanup_queues(priv);
516 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
518 if (priv->adapter->if_ops.cleanup_mpa_buf)
519 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
521 mwifiex_wmm_delete_all_ralist(priv);
522 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
524 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
528 * This function retrieves a particular RA list node, matching with the
529 * given TID and RA address.
531 static struct mwifiex_ra_list_tbl *
532 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
535 struct mwifiex_ra_list_tbl *ra_list;
537 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
539 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
547 * This function retrieves an RA list node for a given TID and
550 * If no such node is found, a new node is added first and then
553 static struct mwifiex_ra_list_tbl *
554 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
556 struct mwifiex_ra_list_tbl *ra_list;
558 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
561 mwifiex_ralist_add(priv, ra_addr);
563 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
567 * This function checks if a particular RA list node exists in a given TID
571 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
572 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
574 struct mwifiex_ra_list_tbl *rlist;
576 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
578 if (rlist == ra_list)
586 * This function adds a packet to WMM queue.
588 * In disconnected state the packet is immediately dropped and the
589 * packet send completion callback is called with status failure.
591 * Otherwise, the correct RA list node is located and the packet
592 * is queued at the list tail.
595 mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter,
598 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
599 struct mwifiex_private *priv = adapter->priv[tx_info->bss_index];
601 struct mwifiex_ra_list_tbl *ra_list;
602 u8 ra[ETH_ALEN], tid_down;
605 if (!priv->media_connected) {
606 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
607 mwifiex_write_data_complete(adapter, skb, -1);
613 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
615 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
617 /* In case of infra as we have already created the list during
618 association we just don't have to call get_queue_raptr, we will
619 have only 1 raptr for a tid in case of infra */
620 if (!mwifiex_queuing_ra_based(priv)) {
621 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
622 ra_list = list_first_entry(
623 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
624 struct mwifiex_ra_list_tbl, list);
628 memcpy(ra, skb->data, ETH_ALEN);
629 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
633 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
634 mwifiex_write_data_complete(adapter, skb, -1);
638 skb_queue_tail(&ra_list->skb_head, skb);
640 ra_list->total_pkts_size += skb->len;
642 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
646 * This function processes the get WMM status command response from firmware.
648 * The response may contain multiple TLVs -
649 * - AC Queue status TLVs
650 * - Current WMM Parameter IE TLV
651 * - Admission Control action frame TLVs
653 * This function parses the TLVs and then calls further specific functions
654 * to process any changes in the queue prioritize or state.
656 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
657 const struct host_cmd_ds_command *resp)
659 u8 *curr = (u8 *) &resp->params.get_wmm_status;
660 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
663 struct mwifiex_ie_types_data *tlv_hdr;
664 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
665 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
666 struct mwifiex_wmm_ac_status *ac_status;
668 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
671 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
672 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
673 tlv_len = le16_to_cpu(tlv_hdr->header.len);
675 switch (le16_to_cpu(tlv_hdr->header.type)) {
676 case TLV_TYPE_WMMQSTATUS:
678 (struct mwifiex_ie_types_wmm_queue_status *)
680 dev_dbg(priv->adapter->dev,
681 "info: CMD_RESP: WMM_GET_STATUS:"
682 " QSTATUS TLV: %d, %d, %d\n",
683 tlv_wmm_qstatus->queue_index,
684 tlv_wmm_qstatus->flow_required,
685 tlv_wmm_qstatus->disabled);
687 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
689 ac_status->disabled = tlv_wmm_qstatus->disabled;
690 ac_status->flow_required =
691 tlv_wmm_qstatus->flow_required;
692 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
695 case WLAN_EID_VENDOR_SPECIFIC:
697 * Point the regular IEEE IE 2 bytes into the Marvell IE
698 * and setup the IEEE IE type and length byte fields
702 (struct ieee_types_wmm_parameter *) (curr +
704 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
705 wmm_param_ie->vend_hdr.element_id =
706 WLAN_EID_VENDOR_SPECIFIC;
708 dev_dbg(priv->adapter->dev,
709 "info: CMD_RESP: WMM_GET_STATUS:"
710 " WMM Parameter Set Count: %d\n",
711 wmm_param_ie->qos_info_bitmap &
712 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
714 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
715 wmm_ie, wmm_param_ie,
716 wmm_param_ie->vend_hdr.len + 2);
725 curr += (tlv_len + sizeof(tlv_hdr->header));
726 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
729 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
730 mwifiex_wmm_setup_ac_downgrade(priv);
736 * Callback handler from the command module to allow insertion of a WMM TLV.
738 * If the BSS we are associating to supports WMM, this function adds the
739 * required WMM Information IE to the association request command buffer in
740 * the form of a Marvell extended IEEE IE.
743 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
745 struct ieee_types_wmm_parameter *wmm_ie,
746 struct ieee80211_ht_cap *ht_cap)
748 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
760 dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:"
762 wmm_ie->vend_hdr.element_id);
764 if ((priv->wmm_required
765 || (ht_cap && (priv->adapter->config_bands & BAND_GN
766 || priv->adapter->config_bands & BAND_AN))
768 && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
769 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
770 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
771 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
772 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
773 le16_to_cpu(wmm_tlv->header.len));
774 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
775 memcpy((u8 *) (wmm_tlv->wmm_ie
776 + le16_to_cpu(wmm_tlv->header.len)
777 - sizeof(priv->wmm_qosinfo)),
779 sizeof(priv->wmm_qosinfo));
781 ret_len = sizeof(wmm_tlv->header)
782 + le16_to_cpu(wmm_tlv->header.len);
784 *assoc_buf += ret_len;
791 * This function computes the time delay in the driver queues for a
794 * When the packet is received at the OS/Driver interface, the current
795 * time is set in the packet structure. The difference between the present
796 * time and that received time is computed in this function and limited
797 * based on pre-compiled limits in the driver.
800 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
801 const struct sk_buff *skb)
804 struct timeval out_tstamp, in_tstamp;
807 do_gettimeofday(&out_tstamp);
808 in_tstamp = ktime_to_timeval(skb->tstamp);
810 queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
811 queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
814 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
815 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
817 * Pass max value if queue_delay is beyond the uint8 range
819 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
821 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
822 " %d ms sent to FW\n", queue_delay, ret_val);
828 * This function retrieves the highest priority RA list table pointer.
830 static struct mwifiex_ra_list_tbl *
831 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
832 struct mwifiex_private **priv, int *tid)
834 struct mwifiex_private *priv_tmp;
835 struct mwifiex_ra_list_tbl *ptr, *head;
836 struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
837 struct mwifiex_tid_tbl *tid_ptr;
842 for (j = adapter->priv_num - 1; j >= 0; --j) {
843 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
845 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
847 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
852 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
853 (struct mwifiex_bss_prio_node *)
854 &adapter->bss_prio_tbl[j].bss_prio_head) {
856 list_first_entry(&adapter->bss_prio_tbl[j]
858 struct mwifiex_bss_prio_node,
860 bssprio_head = bssprio_node;
862 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
863 bssprio_head = bssprio_node;
867 priv_tmp = bssprio_node->priv;
869 for (i = HIGH_PRIO_TID; i >= LOW_PRIO_TID; --i) {
871 tid_ptr = &(priv_tmp)->wmm.
872 tid_tbl_ptr[tos_to_tid[i]];
874 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
877 list_empty(&adapter->bss_prio_tbl[j]
879 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
885 * Always choose the next ra we transmitted
886 * last time, this way we pick the ra's in
887 * round robin fashion.
889 ptr = list_first_entry(
890 &tid_ptr->ra_list_curr->list,
891 struct mwifiex_ra_list_tbl,
895 if (ptr == (struct mwifiex_ra_list_tbl *)
898 ptr = list_first_entry(&ptr->list,
899 struct mwifiex_ra_list_tbl, list);
905 skb_queue_empty(&ptr->skb_head);
906 if (!is_list_empty) {
908 *tid = tos_to_tid[i];
912 ptr = list_first_entry(&ptr->list,
913 struct mwifiex_ra_list_tbl,
916 (struct mwifiex_ra_list_tbl *)
918 ptr = list_first_entry(
920 struct mwifiex_ra_list_tbl,
922 } while (ptr != head);
925 /* Get next bss priority node */
926 bssprio_node = list_first_entry(&bssprio_node->list,
927 struct mwifiex_bss_prio_node,
931 (struct mwifiex_bss_prio_node *)
932 &adapter->bss_prio_tbl[j].bss_prio_head)
933 /* Get next bss priority node */
934 bssprio_node = list_first_entry(
936 struct mwifiex_bss_prio_node,
938 } while (bssprio_node != bssprio_head);
944 * This function gets the number of packets in the Tx queue of a
945 * particular RA list.
948 mwifiex_num_pkts_in_txq(struct mwifiex_private *priv,
949 struct mwifiex_ra_list_tbl *ptr, int max_buf_size)
951 int count = 0, total_size = 0;
952 struct sk_buff *skb, *tmp;
954 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
955 total_size += skb->len;
956 if (total_size < max_buf_size)
966 * This function sends a single packet to firmware for transmission.
969 mwifiex_send_single_packet(struct mwifiex_private *priv,
970 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
971 unsigned long ra_list_flags)
972 __releases(&priv->wmm.ra_list_spinlock)
974 struct sk_buff *skb, *skb_next;
975 struct mwifiex_tx_param tx_param;
976 struct mwifiex_adapter *adapter = priv->adapter;
978 struct mwifiex_txinfo *tx_info;
980 if (skb_queue_empty(&ptr->skb_head)) {
981 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
983 dev_dbg(adapter->dev, "data: nothing to send\n");
987 skb = skb_dequeue(&ptr->skb_head);
989 tx_info = MWIFIEX_SKB_TXCB(skb);
990 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
992 ptr->total_pkts_size -= skb->len;
994 if (!skb_queue_empty(&ptr->skb_head))
995 skb_next = skb_peek(&ptr->skb_head);
999 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1001 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1002 sizeof(struct txpd) : 0);
1004 status = mwifiex_process_tx(priv, skb, &tx_param);
1006 if (status == -EBUSY) {
1007 /* Queue the packet back at the head */
1008 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1010 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1011 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1013 mwifiex_write_data_complete(adapter, skb, -1);
1017 skb_queue_tail(&ptr->skb_head, skb);
1019 ptr->total_pkts_size += skb->len;
1020 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1021 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1024 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1025 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1026 priv->wmm.packets_out[ptr_index]++;
1027 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1029 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1031 &adapter->bss_prio_tbl[priv->bss_priority]
1032 .bss_prio_cur->list,
1033 struct mwifiex_bss_prio_node,
1035 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1041 * This function checks if the first packet in the given RA list
1042 * is already processed or not.
1045 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1046 struct mwifiex_ra_list_tbl *ptr)
1048 struct sk_buff *skb;
1049 struct mwifiex_txinfo *tx_info;
1051 if (skb_queue_empty(&ptr->skb_head))
1054 skb = skb_peek(&ptr->skb_head);
1056 tx_info = MWIFIEX_SKB_TXCB(skb);
1057 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1064 * This function sends a single processed packet to firmware for
1068 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1069 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1070 unsigned long ra_list_flags)
1071 __releases(&priv->wmm.ra_list_spinlock)
1073 struct mwifiex_tx_param tx_param;
1074 struct mwifiex_adapter *adapter = priv->adapter;
1076 struct sk_buff *skb, *skb_next;
1077 struct mwifiex_txinfo *tx_info;
1079 if (skb_queue_empty(&ptr->skb_head)) {
1080 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1085 skb = skb_dequeue(&ptr->skb_head);
1087 if (!skb_queue_empty(&ptr->skb_head))
1088 skb_next = skb_peek(&ptr->skb_head);
1092 tx_info = MWIFIEX_SKB_TXCB(skb);
1094 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1095 tx_param.next_pkt_len =
1096 ((skb_next) ? skb_next->len +
1097 sizeof(struct txpd) : 0);
1098 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1099 skb->data, skb->len, &tx_param);
1102 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1103 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1105 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1106 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1108 mwifiex_write_data_complete(adapter, skb, -1);
1112 skb_queue_tail(&ptr->skb_head, skb);
1114 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1115 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1119 adapter->data_sent = false;
1120 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1121 adapter->dbg.num_tx_host_to_card_failure++;
1122 mwifiex_write_data_complete(adapter, skb, ret);
1125 adapter->data_sent = false;
1129 if (ret != -EBUSY) {
1130 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1131 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1132 priv->wmm.packets_out[ptr_index]++;
1133 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1135 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1137 &adapter->bss_prio_tbl[priv->bss_priority]
1138 .bss_prio_cur->list,
1139 struct mwifiex_bss_prio_node,
1141 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1147 * This function dequeues a packet from the highest priority list
1151 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1153 struct mwifiex_ra_list_tbl *ptr;
1154 struct mwifiex_private *priv = NULL;
1157 int tid_del = 0, tid = 0;
1158 unsigned long flags;
1160 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1164 tid = mwifiex_get_tid(priv->adapter, ptr);
1166 dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1168 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1169 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1170 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1174 if (mwifiex_is_ptr_processed(priv, ptr)) {
1175 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1176 /* ra_list_spinlock has been freed in
1177 mwifiex_send_processed_packet() */
1181 if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid)
1182 || ((priv->sec_info.wpa_enabled
1183 || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set)
1185 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1186 /* ra_list_spinlock has been freed in
1187 mwifiex_send_single_packet() */
1189 if (mwifiex_is_ampdu_allowed(priv, ptr, tid)) {
1190 if (mwifiex_is_ba_stream_avail(priv)) {
1191 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1193 BA_STREAM_SETUP_INPROGRESS);
1194 mwifiex_send_addba(priv, tid, ptr->ra);
1195 } else if (mwifiex_find_stream_to_delete
1196 (priv, ptr, tid, &tid_del, ra)) {
1197 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1199 BA_STREAM_SETUP_INPROGRESS);
1200 mwifiex_send_delba(priv, tid_del, ra, 1);
1203 /* Minimum number of AMSDU */
1204 #define MIN_NUM_AMSDU 2
1205 if (mwifiex_is_amsdu_allowed(priv, ptr, tid) &&
1206 (mwifiex_num_pkts_in_txq(priv, ptr, adapter->tx_buf_size) >=
1208 mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1210 /* ra_list_spinlock has been freed in
1211 mwifiex_11n_aggregate_pkt() */
1213 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1214 /* ra_list_spinlock has been freed in
1215 mwifiex_send_single_packet() */
1221 * This function transmits the highest priority packet awaiting in the
1225 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1229 if (adapter->data_sent || adapter->tx_lock_flag)
1232 if (mwifiex_dequeue_tx_packet(adapter))