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
);
130 /* This function returns random no between 16 and 32 to be used as threshold
131 * for no of packets after which BA setup is initiated.
133 static u8
mwifiex_get_random_ba_threshold(void)
136 struct timeval ba_tstamp
;
139 /* setup ba_packet_threshold here random number between
140 * [BA_SETUP_PACKET_OFFSET,
141 * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
144 do_gettimeofday(&ba_tstamp
);
145 sec
= (ba_tstamp
.tv_sec
& 0xFFFF) + (ba_tstamp
.tv_sec
>> 16);
146 usec
= (ba_tstamp
.tv_usec
& 0xFFFF) + (ba_tstamp
.tv_usec
>> 16);
147 ba_threshold
= (((sec
<< 16) + usec
) % BA_SETUP_MAX_PACKET_THRESHOLD
)
148 + BA_SETUP_PACKET_OFFSET
;
154 * This function allocates and adds a RA list for all TIDs
158 mwifiex_ralist_add(struct mwifiex_private
*priv
, u8
*ra
)
161 struct mwifiex_ra_list_tbl
*ra_list
;
162 struct mwifiex_adapter
*adapter
= priv
->adapter
;
163 struct mwifiex_sta_node
*node
;
166 spin_lock_irqsave(&priv
->sta_list_spinlock
, flags
);
167 node
= mwifiex_get_sta_entry(priv
, ra
);
168 spin_unlock_irqrestore(&priv
->sta_list_spinlock
, flags
);
170 for (i
= 0; i
< MAX_NUM_TID
; ++i
) {
171 ra_list
= mwifiex_wmm_allocate_ralist_node(adapter
, ra
);
172 dev_dbg(adapter
->dev
, "info: created ra_list %p\n", ra_list
);
177 ra_list
->is_11n_enabled
= 0;
178 if (!mwifiex_queuing_ra_based(priv
)) {
179 ra_list
->is_11n_enabled
= IS_11N_ENABLED(priv
);
181 ra_list
->is_11n_enabled
=
182 mwifiex_is_sta_11n_enabled(priv
, node
);
183 if (ra_list
->is_11n_enabled
)
184 ra_list
->max_amsdu
= node
->max_amsdu
;
187 dev_dbg(adapter
->dev
, "data: ralist %p: is_11n_enabled=%d\n",
188 ra_list
, ra_list
->is_11n_enabled
);
190 if (ra_list
->is_11n_enabled
) {
191 ra_list
->pkt_count
= 0;
192 ra_list
->ba_packet_thr
=
193 mwifiex_get_random_ba_threshold();
195 list_add_tail(&ra_list
->list
,
196 &priv
->wmm
.tid_tbl_ptr
[i
].ra_list
);
198 if (!priv
->wmm
.tid_tbl_ptr
[i
].ra_list_curr
)
199 priv
->wmm
.tid_tbl_ptr
[i
].ra_list_curr
= ra_list
;
204 * This function sets the WMM queue priorities to their default values.
206 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private
*priv
)
208 /* Default queue priorities: VO->VI->BE->BK */
209 priv
->wmm
.queue_priority
[0] = WMM_AC_VO
;
210 priv
->wmm
.queue_priority
[1] = WMM_AC_VI
;
211 priv
->wmm
.queue_priority
[2] = WMM_AC_BE
;
212 priv
->wmm
.queue_priority
[3] = WMM_AC_BK
;
216 * This function map ACs to TIDs.
219 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc
*wmm
)
221 u8
*queue_priority
= wmm
->queue_priority
;
224 for (i
= 0; i
< 4; ++i
) {
225 tos_to_tid
[7 - (i
* 2)] = ac_to_tid
[queue_priority
[i
]][1];
226 tos_to_tid
[6 - (i
* 2)] = ac_to_tid
[queue_priority
[i
]][0];
229 for (i
= 0; i
< MAX_NUM_TID
; ++i
)
230 tos_to_tid_inv
[tos_to_tid
[i
]] = (u8
)i
;
232 atomic_set(&wmm
->highest_queued_prio
, HIGH_PRIO_TID
);
236 * This function initializes WMM priority queues.
239 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private
*priv
,
240 struct ieee_types_wmm_parameter
*wmm_ie
)
242 u16 cw_min
, avg_back_off
, tmp
[4];
246 if (!wmm_ie
|| !priv
->wmm_enabled
) {
247 /* WMM is not enabled, just set the defaults and return */
248 mwifiex_wmm_default_queue_priorities(priv
);
252 dev_dbg(priv
->adapter
->dev
, "info: WMM Parameter IE: version=%d, "
253 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
254 wmm_ie
->vend_hdr
.version
, wmm_ie
->qos_info_bitmap
&
255 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK
,
258 for (num_ac
= 0; num_ac
< ARRAY_SIZE(wmm_ie
->ac_params
); num_ac
++) {
259 u8 ecw
= wmm_ie
->ac_params
[num_ac
].ecw_bitmap
;
260 u8 aci_aifsn
= wmm_ie
->ac_params
[num_ac
].aci_aifsn_bitmap
;
261 cw_min
= (1 << (ecw
& MWIFIEX_ECW_MIN
)) - 1;
262 avg_back_off
= (cw_min
>> 1) + (aci_aifsn
& MWIFIEX_AIFSN
);
264 ac_idx
= wmm_aci_to_qidx_map
[(aci_aifsn
& MWIFIEX_ACI
) >> 5];
265 priv
->wmm
.queue_priority
[ac_idx
] = ac_idx
;
266 tmp
[ac_idx
] = avg_back_off
;
268 dev_dbg(priv
->adapter
->dev
,
269 "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
270 (1 << ((ecw
& MWIFIEX_ECW_MAX
) >> 4)) - 1,
271 cw_min
, avg_back_off
);
272 mwifiex_wmm_ac_debug_print(&wmm_ie
->ac_params
[num_ac
]);
276 for (i
= 0; i
< num_ac
; i
++) {
277 for (j
= 1; j
< num_ac
- i
; j
++) {
278 if (tmp
[j
- 1] > tmp
[j
]) {
279 swap(tmp
[j
- 1], tmp
[j
]);
280 swap(priv
->wmm
.queue_priority
[j
- 1],
281 priv
->wmm
.queue_priority
[j
]);
282 } else if (tmp
[j
- 1] == tmp
[j
]) {
283 if (priv
->wmm
.queue_priority
[j
- 1]
284 < priv
->wmm
.queue_priority
[j
])
285 swap(priv
->wmm
.queue_priority
[j
- 1],
286 priv
->wmm
.queue_priority
[j
]);
291 mwifiex_wmm_queue_priorities_tid(&priv
->wmm
);
295 * This function evaluates whether or not an AC is to be downgraded.
297 * In case the AC is not enabled, the highest AC is returned that is
298 * enabled and does not require admission control.
300 static enum mwifiex_wmm_ac_e
301 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private
*priv
,
302 enum mwifiex_wmm_ac_e eval_ac
)
305 enum mwifiex_wmm_ac_e ret_ac
;
306 struct mwifiex_wmm_ac_status
*ac_status
;
308 ac_status
= &priv
->wmm
.ac_status
[eval_ac
];
310 if (!ac_status
->disabled
)
311 /* Okay to use this AC, its enabled */
314 /* Setup a default return value of the lowest priority */
318 * Find the highest AC that is enabled and does not require
319 * admission control. The spec disallows downgrading to an AC,
320 * which is enabled due to a completed admission control.
321 * Unadmitted traffic is not to be sent on an AC with admitted
324 for (down_ac
= WMM_AC_BK
; down_ac
< eval_ac
; down_ac
++) {
325 ac_status
= &priv
->wmm
.ac_status
[down_ac
];
327 if (!ac_status
->disabled
&& !ac_status
->flow_required
)
328 /* AC is enabled and does not require admission
330 ret_ac
= (enum mwifiex_wmm_ac_e
) down_ac
;
337 * This function downgrades WMM priority queue.
340 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private
*priv
)
344 dev_dbg(priv
->adapter
->dev
, "info: WMM: AC Priorities:"
345 "BK(0), BE(1), VI(2), VO(3)\n");
347 if (!priv
->wmm_enabled
) {
348 /* WMM is not enabled, default priorities */
349 for (ac_val
= WMM_AC_BK
; ac_val
<= WMM_AC_VO
; ac_val
++)
350 priv
->wmm
.ac_down_graded_vals
[ac_val
] =
351 (enum mwifiex_wmm_ac_e
) ac_val
;
353 for (ac_val
= WMM_AC_BK
; ac_val
<= WMM_AC_VO
; ac_val
++) {
354 priv
->wmm
.ac_down_graded_vals
[ac_val
]
355 = mwifiex_wmm_eval_downgrade_ac(priv
,
356 (enum mwifiex_wmm_ac_e
) ac_val
);
357 dev_dbg(priv
->adapter
->dev
,
358 "info: WMM: AC PRIO %d maps to %d\n",
359 ac_val
, priv
->wmm
.ac_down_graded_vals
[ac_val
]);
365 * This function converts the IP TOS field to an WMM AC
368 static enum mwifiex_wmm_ac_e
369 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter
*adapter
, u32 tos
)
371 /* Map of TOS UP values to WMM AC */
372 const enum mwifiex_wmm_ac_e tos_to_ac
[] = { WMM_AC_BE
,
382 if (tos
>= ARRAY_SIZE(tos_to_ac
))
385 return tos_to_ac
[tos
];
389 * This function evaluates a given TID and downgrades it to a lower
390 * TID if the WMM Parameter IE received from the AP indicates that the
391 * AP is disabled (due to call admission control (ACM bit). Mapping
392 * of TID to AC is taken care of internally.
395 mwifiex_wmm_downgrade_tid(struct mwifiex_private
*priv
, u32 tid
)
397 enum mwifiex_wmm_ac_e ac
, ac_down
;
400 ac
= mwifiex_wmm_convert_tos_to_ac(priv
->adapter
, tid
);
401 ac_down
= priv
->wmm
.ac_down_graded_vals
[ac
];
403 /* Send the index to tid array, picking from the array will be
404 * taken care by dequeuing function
406 new_tid
= ac_to_tid
[ac_down
][tid
% 2];
412 * This function initializes the WMM state information and the
413 * WMM data path queues.
416 mwifiex_wmm_init(struct mwifiex_adapter
*adapter
)
419 struct mwifiex_private
*priv
;
421 for (j
= 0; j
< adapter
->priv_num
; ++j
) {
422 priv
= adapter
->priv
[j
];
426 for (i
= 0; i
< MAX_NUM_TID
; ++i
) {
427 priv
->aggr_prio_tbl
[i
].amsdu
= tos_to_tid_inv
[i
];
428 priv
->aggr_prio_tbl
[i
].ampdu_ap
= tos_to_tid_inv
[i
];
429 priv
->aggr_prio_tbl
[i
].ampdu_user
= tos_to_tid_inv
[i
];
430 priv
->wmm
.tid_tbl_ptr
[i
].ra_list_curr
= NULL
;
433 priv
->aggr_prio_tbl
[6].amsdu
434 = priv
->aggr_prio_tbl
[6].ampdu_ap
435 = priv
->aggr_prio_tbl
[6].ampdu_user
436 = BA_STREAM_NOT_ALLOWED
;
438 priv
->aggr_prio_tbl
[7].amsdu
= priv
->aggr_prio_tbl
[7].ampdu_ap
439 = priv
->aggr_prio_tbl
[7].ampdu_user
440 = BA_STREAM_NOT_ALLOWED
;
442 priv
->add_ba_param
.timeout
= MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT
;
443 priv
->add_ba_param
.tx_win_size
= MWIFIEX_AMPDU_DEF_TXWINSIZE
;
444 priv
->add_ba_param
.rx_win_size
= MWIFIEX_AMPDU_DEF_RXWINSIZE
;
446 mwifiex_reset_11n_rx_seq_num(priv
);
448 atomic_set(&priv
->wmm
.tx_pkts_queued
, 0);
449 atomic_set(&priv
->wmm
.highest_queued_prio
, HIGH_PRIO_TID
);
454 * This function checks if WMM Tx queue is empty.
457 mwifiex_wmm_lists_empty(struct mwifiex_adapter
*adapter
)
460 struct mwifiex_private
*priv
;
462 for (i
= 0; i
< adapter
->priv_num
; ++i
) {
463 priv
= adapter
->priv
[i
];
464 if (priv
&& atomic_read(&priv
->wmm
.tx_pkts_queued
))
472 * This function deletes all packets in an RA list node.
474 * The packet sent completion callback handler are called with
475 * status failure, after they are dequeued to ensure proper
476 * cleanup. The RA list node itself is freed at the end.
479 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private
*priv
,
480 struct mwifiex_ra_list_tbl
*ra_list
)
482 struct mwifiex_adapter
*adapter
= priv
->adapter
;
483 struct sk_buff
*skb
, *tmp
;
485 skb_queue_walk_safe(&ra_list
->skb_head
, skb
, tmp
)
486 mwifiex_write_data_complete(adapter
, skb
, -1);
490 * This function deletes all packets in an RA list.
492 * Each nodes in the RA list are freed individually first, and then
493 * the RA list itself is freed.
496 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private
*priv
,
497 struct list_head
*ra_list_head
)
499 struct mwifiex_ra_list_tbl
*ra_list
;
501 list_for_each_entry(ra_list
, ra_list_head
, list
)
502 mwifiex_wmm_del_pkts_in_ralist_node(priv
, ra_list
);
506 * This function deletes all packets in all RA lists.
508 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private
*priv
)
512 for (i
= 0; i
< MAX_NUM_TID
; i
++)
513 mwifiex_wmm_del_pkts_in_ralist(priv
, &priv
->wmm
.tid_tbl_ptr
[i
].
516 atomic_set(&priv
->wmm
.tx_pkts_queued
, 0);
517 atomic_set(&priv
->wmm
.highest_queued_prio
, HIGH_PRIO_TID
);
521 * This function deletes all route addresses from all RA lists.
523 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private
*priv
)
525 struct mwifiex_ra_list_tbl
*ra_list
, *tmp_node
;
528 for (i
= 0; i
< MAX_NUM_TID
; ++i
) {
529 dev_dbg(priv
->adapter
->dev
,
530 "info: ra_list: freeing buf for tid %d\n", i
);
531 list_for_each_entry_safe(ra_list
, tmp_node
,
532 &priv
->wmm
.tid_tbl_ptr
[i
].ra_list
,
534 list_del(&ra_list
->list
);
538 INIT_LIST_HEAD(&priv
->wmm
.tid_tbl_ptr
[i
].ra_list
);
540 priv
->wmm
.tid_tbl_ptr
[i
].ra_list_curr
= NULL
;
545 * This function cleans up the Tx and Rx queues.
548 * - All packets in RA lists
549 * - All entries in Rx reorder table
550 * - All entries in Tx BA stream table
551 * - MPA buffer (if required)
555 mwifiex_clean_txrx(struct mwifiex_private
*priv
)
559 mwifiex_11n_cleanup_reorder_tbl(priv
);
560 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, flags
);
562 mwifiex_wmm_cleanup_queues(priv
);
563 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv
);
565 if (priv
->adapter
->if_ops
.cleanup_mpa_buf
)
566 priv
->adapter
->if_ops
.cleanup_mpa_buf(priv
->adapter
);
568 mwifiex_wmm_delete_all_ralist(priv
);
569 memcpy(tos_to_tid
, ac_to_tid
, sizeof(tos_to_tid
));
571 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, flags
);
575 * This function retrieves a particular RA list node, matching with the
576 * given TID and RA address.
578 static struct mwifiex_ra_list_tbl
*
579 mwifiex_wmm_get_ralist_node(struct mwifiex_private
*priv
, u8 tid
,
582 struct mwifiex_ra_list_tbl
*ra_list
;
584 list_for_each_entry(ra_list
, &priv
->wmm
.tid_tbl_ptr
[tid
].ra_list
,
586 if (!memcmp(ra_list
->ra
, ra_addr
, ETH_ALEN
))
594 * This function retrieves an RA list node for a given TID and
597 * If no such node is found, a new node is added first and then
600 static struct mwifiex_ra_list_tbl
*
601 mwifiex_wmm_get_queue_raptr(struct mwifiex_private
*priv
, u8 tid
, u8
*ra_addr
)
603 struct mwifiex_ra_list_tbl
*ra_list
;
605 ra_list
= mwifiex_wmm_get_ralist_node(priv
, tid
, ra_addr
);
608 mwifiex_ralist_add(priv
, ra_addr
);
610 return mwifiex_wmm_get_ralist_node(priv
, tid
, ra_addr
);
614 * This function checks if a particular RA list node exists in a given TID
618 mwifiex_is_ralist_valid(struct mwifiex_private
*priv
,
619 struct mwifiex_ra_list_tbl
*ra_list
, int ptr_index
)
621 struct mwifiex_ra_list_tbl
*rlist
;
623 list_for_each_entry(rlist
, &priv
->wmm
.tid_tbl_ptr
[ptr_index
].ra_list
,
625 if (rlist
== ra_list
)
633 * This function adds a packet to WMM queue.
635 * In disconnected state the packet is immediately dropped and the
636 * packet send completion callback is called with status failure.
638 * Otherwise, the correct RA list node is located and the packet
639 * is queued at the list tail.
642 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private
*priv
,
645 struct mwifiex_adapter
*adapter
= priv
->adapter
;
647 struct mwifiex_ra_list_tbl
*ra_list
;
648 u8 ra
[ETH_ALEN
], tid_down
;
651 if (!priv
->media_connected
&& !mwifiex_is_skb_mgmt_frame(skb
)) {
652 dev_dbg(adapter
->dev
, "data: drop packet in disconnect\n");
653 mwifiex_write_data_complete(adapter
, skb
, -1);
659 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, flags
);
661 tid_down
= mwifiex_wmm_downgrade_tid(priv
, tid
);
663 /* In case of infra as we have already created the list during
664 association we just don't have to call get_queue_raptr, we will
665 have only 1 raptr for a tid in case of infra */
666 if (!mwifiex_queuing_ra_based(priv
) &&
667 !mwifiex_is_skb_mgmt_frame(skb
)) {
668 if (!list_empty(&priv
->wmm
.tid_tbl_ptr
[tid_down
].ra_list
))
669 ra_list
= list_first_entry(
670 &priv
->wmm
.tid_tbl_ptr
[tid_down
].ra_list
,
671 struct mwifiex_ra_list_tbl
, list
);
675 memcpy(ra
, skb
->data
, ETH_ALEN
);
676 if (ra
[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb
))
677 memset(ra
, 0xff, ETH_ALEN
);
678 ra_list
= mwifiex_wmm_get_queue_raptr(priv
, tid_down
, ra
);
682 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, flags
);
683 mwifiex_write_data_complete(adapter
, skb
, -1);
687 skb_queue_tail(&ra_list
->skb_head
, skb
);
689 ra_list
->total_pkts_size
+= skb
->len
;
690 ra_list
->pkt_count
++;
692 atomic_inc(&priv
->wmm
.tx_pkts_queued
);
694 if (atomic_read(&priv
->wmm
.highest_queued_prio
) <
695 tos_to_tid_inv
[tid_down
])
696 atomic_set(&priv
->wmm
.highest_queued_prio
,
697 tos_to_tid_inv
[tid_down
]);
699 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, flags
);
703 * This function processes the get WMM status command response from firmware.
705 * The response may contain multiple TLVs -
706 * - AC Queue status TLVs
707 * - Current WMM Parameter IE TLV
708 * - Admission Control action frame TLVs
710 * This function parses the TLVs and then calls further specific functions
711 * to process any changes in the queue prioritize or state.
713 int mwifiex_ret_wmm_get_status(struct mwifiex_private
*priv
,
714 const struct host_cmd_ds_command
*resp
)
716 u8
*curr
= (u8
*) &resp
->params
.get_wmm_status
;
717 uint16_t resp_len
= le16_to_cpu(resp
->size
), tlv_len
;
720 struct mwifiex_ie_types_data
*tlv_hdr
;
721 struct mwifiex_ie_types_wmm_queue_status
*tlv_wmm_qstatus
;
722 struct ieee_types_wmm_parameter
*wmm_param_ie
= NULL
;
723 struct mwifiex_wmm_ac_status
*ac_status
;
725 dev_dbg(priv
->adapter
->dev
, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
728 while ((resp_len
>= sizeof(tlv_hdr
->header
)) && valid
) {
729 tlv_hdr
= (struct mwifiex_ie_types_data
*) curr
;
730 tlv_len
= le16_to_cpu(tlv_hdr
->header
.len
);
732 switch (le16_to_cpu(tlv_hdr
->header
.type
)) {
733 case TLV_TYPE_WMMQSTATUS
:
735 (struct mwifiex_ie_types_wmm_queue_status
*)
737 dev_dbg(priv
->adapter
->dev
,
738 "info: CMD_RESP: WMM_GET_STATUS:"
739 " QSTATUS TLV: %d, %d, %d\n",
740 tlv_wmm_qstatus
->queue_index
,
741 tlv_wmm_qstatus
->flow_required
,
742 tlv_wmm_qstatus
->disabled
);
744 ac_status
= &priv
->wmm
.ac_status
[tlv_wmm_qstatus
->
746 ac_status
->disabled
= tlv_wmm_qstatus
->disabled
;
747 ac_status
->flow_required
=
748 tlv_wmm_qstatus
->flow_required
;
749 ac_status
->flow_created
= tlv_wmm_qstatus
->flow_created
;
752 case WLAN_EID_VENDOR_SPECIFIC
:
754 * Point the regular IEEE IE 2 bytes into the Marvell IE
755 * and setup the IEEE IE type and length byte fields
759 (struct ieee_types_wmm_parameter
*) (curr
+
761 wmm_param_ie
->vend_hdr
.len
= (u8
) tlv_len
;
762 wmm_param_ie
->vend_hdr
.element_id
=
763 WLAN_EID_VENDOR_SPECIFIC
;
765 dev_dbg(priv
->adapter
->dev
,
766 "info: CMD_RESP: WMM_GET_STATUS:"
767 " WMM Parameter Set Count: %d\n",
768 wmm_param_ie
->qos_info_bitmap
&
769 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK
);
771 memcpy((u8
*) &priv
->curr_bss_params
.bss_descriptor
.
772 wmm_ie
, wmm_param_ie
,
773 wmm_param_ie
->vend_hdr
.len
+ 2);
782 curr
+= (tlv_len
+ sizeof(tlv_hdr
->header
));
783 resp_len
-= (tlv_len
+ sizeof(tlv_hdr
->header
));
786 mwifiex_wmm_setup_queue_priorities(priv
, wmm_param_ie
);
787 mwifiex_wmm_setup_ac_downgrade(priv
);
793 * Callback handler from the command module to allow insertion of a WMM TLV.
795 * If the BSS we are associating to supports WMM, this function adds the
796 * required WMM Information IE to the association request command buffer in
797 * the form of a Marvell extended IEEE IE.
800 mwifiex_wmm_process_association_req(struct mwifiex_private
*priv
,
802 struct ieee_types_wmm_parameter
*wmm_ie
,
803 struct ieee80211_ht_cap
*ht_cap
)
805 struct mwifiex_ie_types_wmm_param_set
*wmm_tlv
;
817 dev_dbg(priv
->adapter
->dev
,
818 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
819 wmm_ie
->vend_hdr
.element_id
);
821 if ((priv
->wmm_required
||
822 (ht_cap
&& (priv
->adapter
->config_bands
& BAND_GN
||
823 priv
->adapter
->config_bands
& BAND_AN
))) &&
824 wmm_ie
->vend_hdr
.element_id
== WLAN_EID_VENDOR_SPECIFIC
) {
825 wmm_tlv
= (struct mwifiex_ie_types_wmm_param_set
*) *assoc_buf
;
826 wmm_tlv
->header
.type
= cpu_to_le16((u16
) wmm_info_ie
[0]);
827 wmm_tlv
->header
.len
= cpu_to_le16((u16
) wmm_info_ie
[1]);
828 memcpy(wmm_tlv
->wmm_ie
, &wmm_info_ie
[2],
829 le16_to_cpu(wmm_tlv
->header
.len
));
830 if (wmm_ie
->qos_info_bitmap
& IEEE80211_WMM_IE_AP_QOSINFO_UAPSD
)
831 memcpy((u8
*) (wmm_tlv
->wmm_ie
832 + le16_to_cpu(wmm_tlv
->header
.len
)
833 - sizeof(priv
->wmm_qosinfo
)),
834 &priv
->wmm_qosinfo
, sizeof(priv
->wmm_qosinfo
));
836 ret_len
= sizeof(wmm_tlv
->header
)
837 + le16_to_cpu(wmm_tlv
->header
.len
);
839 *assoc_buf
+= ret_len
;
846 * This function computes the time delay in the driver queues for a
849 * When the packet is received at the OS/Driver interface, the current
850 * time is set in the packet structure. The difference between the present
851 * time and that received time is computed in this function and limited
852 * based on pre-compiled limits in the driver.
855 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private
*priv
,
856 const struct sk_buff
*skb
)
859 struct timeval out_tstamp
, in_tstamp
;
862 do_gettimeofday(&out_tstamp
);
863 in_tstamp
= ktime_to_timeval(skb
->tstamp
);
865 queue_delay
= (out_tstamp
.tv_sec
- in_tstamp
.tv_sec
) * 1000;
866 queue_delay
+= (out_tstamp
.tv_usec
- in_tstamp
.tv_usec
) / 1000;
869 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
870 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
872 * Pass max value if queue_delay is beyond the uint8 range
874 ret_val
= (u8
) (min(queue_delay
, priv
->wmm
.drv_pkt_delay_max
) >> 1);
876 dev_dbg(priv
->adapter
->dev
, "data: WMM: Pkt Delay: %d ms,"
877 " %d ms sent to FW\n", queue_delay
, ret_val
);
883 * This function retrieves the highest priority RA list table pointer.
885 static struct mwifiex_ra_list_tbl
*
886 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter
*adapter
,
887 struct mwifiex_private
**priv
, int *tid
)
889 struct mwifiex_private
*priv_tmp
;
890 struct mwifiex_ra_list_tbl
*ptr
, *head
;
891 struct mwifiex_bss_prio_node
*bssprio_node
, *bssprio_head
;
892 struct mwifiex_tid_tbl
*tid_ptr
;
898 for (j
= adapter
->priv_num
- 1; j
>= 0; --j
) {
899 spin_lock_irqsave(&adapter
->bss_prio_tbl
[j
].bss_prio_lock
,
901 is_list_empty
= list_empty(&adapter
->bss_prio_tbl
[j
]
903 spin_unlock_irqrestore(&adapter
->bss_prio_tbl
[j
].bss_prio_lock
,
908 if (adapter
->bss_prio_tbl
[j
].bss_prio_cur
==
909 (struct mwifiex_bss_prio_node
*)
910 &adapter
->bss_prio_tbl
[j
].bss_prio_head
) {
911 adapter
->bss_prio_tbl
[j
].bss_prio_cur
=
912 list_first_entry(&adapter
->bss_prio_tbl
[j
]
914 struct mwifiex_bss_prio_node
,
918 bssprio_node
= adapter
->bss_prio_tbl
[j
].bss_prio_cur
;
919 bssprio_head
= bssprio_node
;
922 priv_tmp
= bssprio_node
->priv
;
923 hqp
= &priv_tmp
->wmm
.highest_queued_prio
;
925 for (i
= atomic_read(hqp
); i
>= LOW_PRIO_TID
; --i
) {
927 tid_ptr
= &(priv_tmp
)->wmm
.
928 tid_tbl_ptr
[tos_to_tid
[i
]];
930 /* For non-STA ra_list_curr may be NULL */
931 if (!tid_ptr
->ra_list_curr
)
934 spin_lock_irqsave(&tid_ptr
->tid_tbl_lock
,
937 list_empty(&adapter
->bss_prio_tbl
[j
]
939 spin_unlock_irqrestore(&tid_ptr
->tid_tbl_lock
,
945 * Always choose the next ra we transmitted
946 * last time, this way we pick the ra's in
947 * round robin fashion.
949 ptr
= list_first_entry(
950 &tid_ptr
->ra_list_curr
->list
,
951 struct mwifiex_ra_list_tbl
,
955 if (ptr
== (struct mwifiex_ra_list_tbl
*)
958 ptr
= list_first_entry(&ptr
->list
,
959 struct mwifiex_ra_list_tbl
, list
);
965 skb_queue_empty(&ptr
->skb_head
);
971 ptr
= list_first_entry(&ptr
->list
,
972 struct mwifiex_ra_list_tbl
,
975 (struct mwifiex_ra_list_tbl
*)
977 ptr
= list_first_entry(
979 struct mwifiex_ra_list_tbl
,
981 } while (ptr
!= head
);
984 /* No packet at any TID for this priv. Mark as such
985 * to skip checking TIDs for this priv (until pkt is
988 atomic_set(hqp
, NO_PKT_PRIO_TID
);
990 /* Get next bss priority node */
991 bssprio_node
= list_first_entry(&bssprio_node
->list
,
992 struct mwifiex_bss_prio_node
,
996 (struct mwifiex_bss_prio_node
*)
997 &adapter
->bss_prio_tbl
[j
].bss_prio_head
)
998 /* Get next bss priority node */
999 bssprio_node
= list_first_entry(
1000 &bssprio_node
->list
,
1001 struct mwifiex_bss_prio_node
,
1003 } while (bssprio_node
!= bssprio_head
);
1008 spin_lock_irqsave(&priv_tmp
->wmm
.ra_list_spinlock
, flags
);
1009 if (atomic_read(hqp
) > i
)
1011 spin_unlock_irqrestore(&priv_tmp
->wmm
.ra_list_spinlock
, flags
);
1014 *tid
= tos_to_tid
[i
];
1020 * This function checks if 11n aggregation is possible.
1023 mwifiex_is_11n_aggragation_possible(struct mwifiex_private
*priv
,
1024 struct mwifiex_ra_list_tbl
*ptr
,
1027 int count
= 0, total_size
= 0;
1028 struct sk_buff
*skb
, *tmp
;
1031 if (priv
->bss_role
== MWIFIEX_BSS_ROLE_UAP
&& priv
->ap_11n_enabled
&&
1032 ptr
->is_11n_enabled
)
1033 max_amsdu_size
= min_t(int, ptr
->max_amsdu
, max_buf_size
);
1035 max_amsdu_size
= max_buf_size
;
1037 skb_queue_walk_safe(&ptr
->skb_head
, skb
, tmp
) {
1038 total_size
+= skb
->len
;
1039 if (total_size
>= max_amsdu_size
)
1041 if (++count
>= MIN_NUM_AMSDU
)
1049 * This function sends a single packet to firmware for transmission.
1052 mwifiex_send_single_packet(struct mwifiex_private
*priv
,
1053 struct mwifiex_ra_list_tbl
*ptr
, int ptr_index
,
1054 unsigned long ra_list_flags
)
1055 __releases(&priv
->wmm
.ra_list_spinlock
)
1057 struct sk_buff
*skb
, *skb_next
;
1058 struct mwifiex_tx_param tx_param
;
1059 struct mwifiex_adapter
*adapter
= priv
->adapter
;
1060 struct mwifiex_txinfo
*tx_info
;
1062 if (skb_queue_empty(&ptr
->skb_head
)) {
1063 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1065 dev_dbg(adapter
->dev
, "data: nothing to send\n");
1069 skb
= skb_dequeue(&ptr
->skb_head
);
1071 tx_info
= MWIFIEX_SKB_TXCB(skb
);
1072 dev_dbg(adapter
->dev
, "data: dequeuing the packet %p %p\n", ptr
, skb
);
1074 ptr
->total_pkts_size
-= skb
->len
;
1076 if (!skb_queue_empty(&ptr
->skb_head
))
1077 skb_next
= skb_peek(&ptr
->skb_head
);
1081 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1083 tx_param
.next_pkt_len
= ((skb_next
) ? skb_next
->len
+
1084 sizeof(struct txpd
) : 0);
1086 if (mwifiex_process_tx(priv
, skb
, &tx_param
) == -EBUSY
) {
1087 /* Queue the packet back at the head */
1088 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1090 if (!mwifiex_is_ralist_valid(priv
, ptr
, ptr_index
)) {
1091 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1093 mwifiex_write_data_complete(adapter
, skb
, -1);
1097 skb_queue_tail(&ptr
->skb_head
, skb
);
1099 ptr
->total_pkts_size
+= skb
->len
;
1101 tx_info
->flags
|= MWIFIEX_BUF_FLAG_REQUEUED_PKT
;
1102 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1105 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1106 if (mwifiex_is_ralist_valid(priv
, ptr
, ptr_index
)) {
1107 priv
->wmm
.packets_out
[ptr_index
]++;
1108 priv
->wmm
.tid_tbl_ptr
[ptr_index
].ra_list_curr
= ptr
;
1110 adapter
->bss_prio_tbl
[priv
->bss_priority
].bss_prio_cur
=
1112 &adapter
->bss_prio_tbl
[priv
->bss_priority
]
1113 .bss_prio_cur
->list
,
1114 struct mwifiex_bss_prio_node
,
1116 atomic_dec(&priv
->wmm
.tx_pkts_queued
);
1117 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1123 * This function checks if the first packet in the given RA list
1124 * is already processed or not.
1127 mwifiex_is_ptr_processed(struct mwifiex_private
*priv
,
1128 struct mwifiex_ra_list_tbl
*ptr
)
1130 struct sk_buff
*skb
;
1131 struct mwifiex_txinfo
*tx_info
;
1133 if (skb_queue_empty(&ptr
->skb_head
))
1136 skb
= skb_peek(&ptr
->skb_head
);
1138 tx_info
= MWIFIEX_SKB_TXCB(skb
);
1139 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_REQUEUED_PKT
)
1146 * This function sends a single processed packet to firmware for
1150 mwifiex_send_processed_packet(struct mwifiex_private
*priv
,
1151 struct mwifiex_ra_list_tbl
*ptr
, int ptr_index
,
1152 unsigned long ra_list_flags
)
1153 __releases(&priv
->wmm
.ra_list_spinlock
)
1155 struct mwifiex_tx_param tx_param
;
1156 struct mwifiex_adapter
*adapter
= priv
->adapter
;
1158 struct sk_buff
*skb
, *skb_next
;
1159 struct mwifiex_txinfo
*tx_info
;
1161 if (skb_queue_empty(&ptr
->skb_head
)) {
1162 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1167 skb
= skb_dequeue(&ptr
->skb_head
);
1169 if (!skb_queue_empty(&ptr
->skb_head
))
1170 skb_next
= skb_peek(&ptr
->skb_head
);
1174 tx_info
= MWIFIEX_SKB_TXCB(skb
);
1176 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1178 if (adapter
->iface_type
== MWIFIEX_USB
) {
1179 adapter
->data_sent
= true;
1180 ret
= adapter
->if_ops
.host_to_card(adapter
, MWIFIEX_USB_EP_DATA
,
1183 tx_param
.next_pkt_len
=
1184 ((skb_next
) ? skb_next
->len
+
1185 sizeof(struct txpd
) : 0);
1186 ret
= adapter
->if_ops
.host_to_card(adapter
, MWIFIEX_TYPE_DATA
,
1192 dev_dbg(adapter
->dev
, "data: -EBUSY is returned\n");
1193 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1195 if (!mwifiex_is_ralist_valid(priv
, ptr
, ptr_index
)) {
1196 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1198 mwifiex_write_data_complete(adapter
, skb
, -1);
1202 skb_queue_tail(&ptr
->skb_head
, skb
);
1204 tx_info
->flags
|= MWIFIEX_BUF_FLAG_REQUEUED_PKT
;
1205 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1209 adapter
->data_sent
= false;
1210 dev_err(adapter
->dev
, "host_to_card failed: %#x\n", ret
);
1211 adapter
->dbg
.num_tx_host_to_card_failure
++;
1212 mwifiex_write_data_complete(adapter
, skb
, ret
);
1215 adapter
->data_sent
= false;
1219 if (ret
!= -EBUSY
) {
1220 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, ra_list_flags
);
1221 if (mwifiex_is_ralist_valid(priv
, ptr
, ptr_index
)) {
1222 priv
->wmm
.packets_out
[ptr_index
]++;
1223 priv
->wmm
.tid_tbl_ptr
[ptr_index
].ra_list_curr
= ptr
;
1225 adapter
->bss_prio_tbl
[priv
->bss_priority
].bss_prio_cur
=
1227 &adapter
->bss_prio_tbl
[priv
->bss_priority
]
1228 .bss_prio_cur
->list
,
1229 struct mwifiex_bss_prio_node
,
1231 atomic_dec(&priv
->wmm
.tx_pkts_queued
);
1232 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
,
1238 * This function dequeues a packet from the highest priority list
1242 mwifiex_dequeue_tx_packet(struct mwifiex_adapter
*adapter
)
1244 struct mwifiex_ra_list_tbl
*ptr
;
1245 struct mwifiex_private
*priv
= NULL
;
1248 int tid_del
= 0, tid
= 0;
1249 unsigned long flags
;
1251 ptr
= mwifiex_wmm_get_highest_priolist_ptr(adapter
, &priv
, &ptr_index
);
1255 tid
= mwifiex_get_tid(ptr
);
1257 dev_dbg(adapter
->dev
, "data: tid=%d\n", tid
);
1259 spin_lock_irqsave(&priv
->wmm
.ra_list_spinlock
, flags
);
1260 if (!mwifiex_is_ralist_valid(priv
, ptr
, ptr_index
)) {
1261 spin_unlock_irqrestore(&priv
->wmm
.ra_list_spinlock
, flags
);
1265 if (mwifiex_is_ptr_processed(priv
, ptr
)) {
1266 mwifiex_send_processed_packet(priv
, ptr
, ptr_index
, flags
);
1267 /* ra_list_spinlock has been freed in
1268 mwifiex_send_processed_packet() */
1272 if (!ptr
->is_11n_enabled
||
1273 mwifiex_is_ba_stream_setup(priv
, ptr
, tid
) ||
1274 priv
->wps
.session_enable
||
1275 ((priv
->sec_info
.wpa_enabled
||
1276 priv
->sec_info
.wpa2_enabled
) &&
1277 !priv
->wpa_is_gtk_set
)) {
1278 mwifiex_send_single_packet(priv
, ptr
, ptr_index
, flags
);
1279 /* ra_list_spinlock has been freed in
1280 mwifiex_send_single_packet() */
1282 if (mwifiex_is_ampdu_allowed(priv
, tid
) &&
1283 ptr
->pkt_count
> ptr
->ba_packet_thr
) {
1284 if (mwifiex_space_avail_for_new_ba_stream(adapter
)) {
1285 mwifiex_create_ba_tbl(priv
, ptr
->ra
, tid
,
1286 BA_SETUP_INPROGRESS
);
1287 mwifiex_send_addba(priv
, tid
, ptr
->ra
);
1288 } else if (mwifiex_find_stream_to_delete
1289 (priv
, tid
, &tid_del
, ra
)) {
1290 mwifiex_create_ba_tbl(priv
, ptr
->ra
, tid
,
1291 BA_SETUP_INPROGRESS
);
1292 mwifiex_send_delba(priv
, tid_del
, ra
, 1);
1295 if (mwifiex_is_amsdu_allowed(priv
, tid
) &&
1296 mwifiex_is_11n_aggragation_possible(priv
, ptr
,
1297 adapter
->tx_buf_size
))
1298 mwifiex_11n_aggregate_pkt(priv
, ptr
, INTF_HEADER_LEN
,
1300 /* ra_list_spinlock has been freed in
1301 mwifiex_11n_aggregate_pkt() */
1303 mwifiex_send_single_packet(priv
, ptr
, ptr_index
, flags
);
1304 /* ra_list_spinlock has been freed in
1305 mwifiex_send_single_packet() */
1311 * This function transmits the highest priority packet awaiting in the
1315 mwifiex_wmm_process_tx(struct mwifiex_adapter
*adapter
)
1319 if (adapter
->data_sent
|| adapter
->tx_lock_flag
)
1322 if (mwifiex_dequeue_tx_packet(adapter
))
1324 } while (!mwifiex_wmm_lists_empty(adapter
));