1 /******************************************************************************
3 * Copyright(c) 2005 - 2007 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/skbuff.h>
29 #include <linux/wireless.h>
30 #include <net/mac80211.h>
31 #include <net/ieee80211.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/delay.h>
37 #include <linux/workqueue.h>
39 #include <net/mac80211.h>
40 #include <linux/wireless.h>
42 #include "../net/mac80211/ieee80211_rate.h"
45 #include "iwl-helpers.h"
47 #define RS_NAME "iwl-4965-rs"
49 #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1
50 #define IWL_NUMBER_TRY 1
51 #define IWL_HT_NUMBER_TRY 3
53 #define IWL_RATE_MAX_WINDOW 62
54 #define IWL_RATE_HIGH_TH 10880
55 #define IWL_RATE_MIN_FAILURE_TH 6
56 #define IWL_RATE_MIN_SUCCESS_TH 8
57 #define IWL_RATE_DECREASE_TH 1920
58 #define IWL_RATE_INCREASE_TH 8960
59 #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */
61 static u8 rs_ht_to_legacy
[] = {
62 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
63 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
65 IWL_RATE_6M_INDEX
, IWL_RATE_9M_INDEX
,
66 IWL_RATE_12M_INDEX
, IWL_RATE_18M_INDEX
,
67 IWL_RATE_24M_INDEX
, IWL_RATE_36M_INDEX
,
68 IWL_RATE_48M_INDEX
, IWL_RATE_54M_INDEX
73 } __attribute__ ((packed
));
75 struct iwl_rate_scale_data
{
84 struct iwl_scale_tbl_info
{
85 enum iwl_table_type lq_type
;
86 enum iwl_antenna_type antenna_type
;
92 struct iwl_rate current_rate
;
93 struct iwl_rate_scale_data win
[IWL_RATE_COUNT
];
96 struct iwl_rate_scale_priv
{
100 u8 search_better_tbl
;
102 u32 table_count_limit
;
103 u32 max_failure_limit
;
104 u32 max_success_limit
;
117 u16 active_siso_rate
;
118 u16 active_mimo_rate
;
119 u16 active_rate_basic
;
120 struct iwl_link_quality_cmd lq
;
121 struct iwl_scale_tbl_info lq_info
[LQ_SIZE
];
124 static void rs_rate_scale_perform(struct iwl_priv
*priv
,
125 struct net_device
*dev
,
126 struct ieee80211_hdr
*hdr
,
127 struct sta_info
*sta
);
128 static int rs_fill_link_cmd(struct iwl_rate_scale_priv
*lq_data
,
129 struct iwl_rate
*tx_mcs
,
130 struct iwl_link_quality_cmd
*tbl
,
131 struct sta_info
*sta
);
134 static s32 expected_tpt_A
[IWL_RATE_COUNT
] = {
135 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186
138 static s32 expected_tpt_G
[IWL_RATE_COUNT
] = {
139 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186
142 static s32 expected_tpt_siso20MHz
[IWL_RATE_COUNT
] = {
143 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202
146 static s32 expected_tpt_siso20MHzSGI
[IWL_RATE_COUNT
] = {
147 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211
150 static s32 expected_tpt_mimo20MHz
[IWL_RATE_COUNT
] = {
151 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251
154 static s32 expected_tpt_mimo20MHzSGI
[IWL_RATE_COUNT
] = {
155 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257
158 static s32 expected_tpt_siso40MHz
[IWL_RATE_COUNT
] = {
159 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257
162 static s32 expected_tpt_siso40MHzSGI
[IWL_RATE_COUNT
] = {
163 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264
166 static s32 expected_tpt_mimo40MHz
[IWL_RATE_COUNT
] = {
167 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289
170 static s32 expected_tpt_mimo40MHzSGI
[IWL_RATE_COUNT
] = {
171 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293
174 static int iwl_lq_sync_callback(struct iwl_priv
*priv
,
175 struct iwl_cmd
*cmd
, struct sk_buff
*skb
)
177 /*We didn't cache the SKB; let the caller free it */
181 static inline u8
iwl_rate_get_rate(u32 rate_n_flags
)
183 return (u8
)(rate_n_flags
& 0xFF);
186 static int rs_send_lq_cmd(struct iwl_priv
*priv
,
187 struct iwl_link_quality_cmd
*lq
, u8 flags
)
189 #ifdef CONFIG_IWLWIFI_DEBUG
194 struct iwl_host_cmd cmd
= {
195 .id
= REPLY_TX_LINK_QUALITY_CMD
,
196 .len
= sizeof(struct iwl_link_quality_cmd
),
201 if ((lq
->sta_id
== 0xFF) &&
202 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
))
205 if (lq
->sta_id
== 0xFF)
206 lq
->sta_id
= IWL_AP_ID
;
208 IWL_DEBUG_RATE("lq station id 0x%x\n", lq
->sta_id
);
209 IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
210 lq
->general_params
.single_stream_ant_msk
,
211 lq
->general_params
.dual_stream_ant_msk
);
212 #ifdef CONFIG_IWLWIFI_DEBUG
213 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++)
214 IWL_DEBUG_RATE("lq index %d 0x%X\n",
215 i
, lq
->rs_table
[i
].rate_n_flags
);
218 if (flags
& CMD_ASYNC
)
219 cmd
.meta
.u
.callback
= iwl_lq_sync_callback
;
221 if (iwl_is_associated(priv
) && priv
->assoc_station_added
&&
222 priv
->lq_mngr
.lq_ready
)
223 rc
= iwl_send_cmd(priv
, &cmd
);
228 static int rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
231 window
->success_counter
= 0;
232 window
->success_ratio
= IWL_INVALID_VALUE
;
234 window
->average_tpt
= IWL_INVALID_VALUE
;
240 static int rs_collect_tx_data(struct iwl_rate_scale_data
*windows
,
241 int scale_index
, s32 tpt
, u32 status
)
244 struct iwl_rate_scale_data
*window
= NULL
;
246 u8 win_size
= IWL_RATE_MAX_WINDOW
;
252 if (scale_index
>= IWL_RATE_COUNT
)
255 window
= &(windows
[scale_index
]);
257 if (window
->counter
>= win_size
) {
259 window
->counter
= win_size
- 1;
261 mask
= (mask
<< (win_size
- 1));
262 if ((window
->data
& mask
)) {
263 window
->data
&= ~mask
;
264 window
->success_counter
= window
->success_counter
- 1;
268 window
->counter
= window
->counter
+ 1;
270 window
->data
= (mask
<< 1);
272 window
->success_counter
= window
->success_counter
+ 1;
276 if (window
->counter
> 0)
277 window
->success_ratio
= 128 * (100 * window
->success_counter
)
280 window
->success_ratio
= IWL_INVALID_VALUE
;
282 fail_count
= window
->counter
- window
->success_counter
;
284 if ((fail_count
>= IWL_RATE_MIN_FAILURE_TH
) ||
285 (window
->success_counter
>= IWL_RATE_MIN_SUCCESS_TH
))
286 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
288 window
->average_tpt
= IWL_INVALID_VALUE
;
290 window
->stamp
= jiffies
;
295 int static rs_mcs_from_tbl(struct iwl_rate
*mcs_rate
,
296 struct iwl_scale_tbl_info
*tbl
,
297 int index
, u8 use_green
)
301 if (is_legacy(tbl
->lq_type
)) {
302 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp
;
303 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
304 mcs_rate
->rate_n_flags
|= RATE_MCS_CCK_MSK
;
306 } else if (is_siso(tbl
->lq_type
)) {
307 if (index
> IWL_LAST_OFDM_RATE
)
308 index
= IWL_LAST_OFDM_RATE
;
309 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp_siso
|
312 if (index
> IWL_LAST_OFDM_RATE
)
313 index
= IWL_LAST_OFDM_RATE
;
314 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp_mimo
|
318 switch (tbl
->antenna_type
) {
320 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_AB_MSK
;
323 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_A_MSK
;
326 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
332 if (is_legacy(tbl
->lq_type
))
337 mcs_rate
->rate_n_flags
|= RATE_MCS_DUP_MSK
;
339 mcs_rate
->rate_n_flags
|= RATE_MCS_FAT_MSK
;
342 mcs_rate
->rate_n_flags
|= RATE_MCS_SGI_MSK
;
345 mcs_rate
->rate_n_flags
|= RATE_MCS_GF_MSK
;
346 if (is_siso(tbl
->lq_type
))
347 mcs_rate
->rate_n_flags
&= ~RATE_MCS_SGI_MSK
;
352 static int rs_get_tbl_info_from_mcs(const struct iwl_rate
*mcs_rate
,
353 int phymode
, struct iwl_scale_tbl_info
*tbl
,
359 index
= iwl_rate_index_from_plcp(mcs_rate
->rate_n_flags
);
361 if (index
== IWL_RATE_INVALID
) {
368 tbl
->antenna_type
= ANT_BOTH
;
370 if (!(mcs_rate
->rate_n_flags
& RATE_MCS_HT_MSK
)) {
371 ant_msk
= (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_AB_MSK
);
373 if (ant_msk
== RATE_MCS_ANT_AB_MSK
)
374 tbl
->lq_type
= LQ_NONE
;
377 if (phymode
== MODE_IEEE80211A
)
382 if (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_A_MSK
)
383 tbl
->antenna_type
= ANT_MAIN
;
385 tbl
->antenna_type
= ANT_AUX
;
389 } else if (iwl_rate_get_rate(mcs_rate
->rate_n_flags
)
390 <= IWL_RATE_SISO_60M_PLCP
) {
391 tbl
->lq_type
= LQ_SISO
;
393 ant_msk
= (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_AB_MSK
);
394 if (ant_msk
== RATE_MCS_ANT_AB_MSK
)
395 tbl
->lq_type
= LQ_NONE
;
397 if (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_A_MSK
)
398 tbl
->antenna_type
= ANT_MAIN
;
400 tbl
->antenna_type
= ANT_AUX
;
402 if (mcs_rate
->rate_n_flags
& RATE_MCS_SGI_MSK
)
405 if ((mcs_rate
->rate_n_flags
& RATE_MCS_FAT_MSK
) ||
406 (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
))
409 if (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
)
414 tbl
->lq_type
= LQ_MIMO
;
415 if (mcs_rate
->rate_n_flags
& RATE_MCS_SGI_MSK
)
418 if ((mcs_rate
->rate_n_flags
& RATE_MCS_FAT_MSK
) ||
419 (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
))
422 if (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
)
429 static inline void rs_toggle_antenna(struct iwl_rate
*new_rate
,
430 struct iwl_scale_tbl_info
*tbl
)
432 if (tbl
->antenna_type
== ANT_AUX
) {
433 tbl
->antenna_type
= ANT_MAIN
;
434 new_rate
->rate_n_flags
&= ~RATE_MCS_ANT_B_MSK
;
435 new_rate
->rate_n_flags
|= RATE_MCS_ANT_A_MSK
;
437 tbl
->antenna_type
= ANT_AUX
;
438 new_rate
->rate_n_flags
&= ~RATE_MCS_ANT_A_MSK
;
439 new_rate
->rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
443 static inline s8
rs_use_green(struct iwl_priv
*priv
)
446 #ifdef CONFIG_IWLWIFI_HT
447 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
450 if ((priv
->current_assoc_ht
.is_green_field
) &&
451 !(priv
->current_assoc_ht
.operating_mode
& 0x4))
453 #endif /*CONFIG_IWLWIFI_HT */
458 * rs_get_supported_rates - get the available rates
460 * if management frame or broadcast frame only return
461 * basic available rates.
464 static void rs_get_supported_rates(struct iwl_rate_scale_priv
*lq_data
,
465 struct ieee80211_hdr
*hdr
,
466 enum iwl_table_type rate_type
,
469 if (is_legacy(rate_type
))
470 *data_rate
= lq_data
->active_rate
;
472 if (is_siso(rate_type
))
473 *data_rate
= lq_data
->active_siso_rate
;
475 *data_rate
= lq_data
->active_mimo_rate
;
478 if (hdr
&& is_multicast_ether_addr(hdr
->addr1
) &&
479 lq_data
->active_rate_basic
)
480 *data_rate
= lq_data
->active_rate_basic
;
483 static u16
rs_get_adjacent_rate(u8 index
, u16 rate_mask
, int rate_type
)
485 u8 high
= IWL_RATE_INVALID
;
486 u8 low
= IWL_RATE_INVALID
;
488 /* 802.11A or ht walks to the next literal adjascent rate in
490 if (is_a_band(rate_type
) || !is_legacy(rate_type
)) {
494 /* Find the previous rate that is in the rate mask */
496 for (mask
= (1 << i
); i
>= 0; i
--, mask
>>= 1) {
497 if (rate_mask
& mask
) {
503 /* Find the next rate that is in the rate mask */
505 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
506 if (rate_mask
& mask
) {
512 return (high
<< 8) | low
;
516 while (low
!= IWL_RATE_INVALID
) {
517 low
= iwl_rates
[low
].prev_rs
;
518 if (low
== IWL_RATE_INVALID
)
520 if (rate_mask
& (1 << low
))
522 IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low
);
526 while (high
!= IWL_RATE_INVALID
) {
527 high
= iwl_rates
[high
].next_rs
;
528 if (high
== IWL_RATE_INVALID
)
530 if (rate_mask
& (1 << high
))
532 IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high
);
535 return (high
<< 8) | low
;
538 static int rs_get_lower_rate(struct iwl_rate_scale_priv
*lq_data
,
539 struct iwl_scale_tbl_info
*tbl
, u8 scale_index
,
540 u8 ht_possible
, struct iwl_rate
*mcs_rate
,
541 struct sta_info
*sta
)
543 u8 is_green
= lq_data
->is_green
;
547 u8 switch_to_legacy
= 0;
549 /* check if we need to switch from HT to legacy rates.
550 * assumption is that mandatory rates (1Mbps or 6Mbps)
551 * are always supported (spec demand) */
552 if (!is_legacy(tbl
->lq_type
) && (!ht_possible
|| !scale_index
)) {
553 switch_to_legacy
= 1;
554 scale_index
= rs_ht_to_legacy
[scale_index
];
555 if (lq_data
->phymode
== MODE_IEEE80211A
)
560 if ((tbl
->antenna_type
== ANT_BOTH
) ||
561 (tbl
->antenna_type
== ANT_NONE
))
562 tbl
->antenna_type
= ANT_MAIN
;
568 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
, &rate_mask
);
570 /* mask with station rate restriction */
571 if (is_legacy(tbl
->lq_type
)) {
572 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
573 rate_mask
= (u16
)(rate_mask
&
574 (sta
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
576 rate_mask
= (u16
)(rate_mask
& sta
->supp_rates
);
579 /* if we did switched from HT to legacy check current rate */
580 if ((switch_to_legacy
) &&
581 (rate_mask
& (1 << scale_index
))) {
582 rs_mcs_from_tbl(mcs_rate
, tbl
, scale_index
, is_green
);
586 high_low
= rs_get_adjacent_rate(scale_index
, rate_mask
, tbl
->lq_type
);
587 low
= high_low
& 0xff;
589 if (low
!= IWL_RATE_INVALID
)
590 rs_mcs_from_tbl(mcs_rate
, tbl
, low
, is_green
);
592 rs_mcs_from_tbl(mcs_rate
, tbl
, scale_index
, is_green
);
597 static void rs_tx_status(void *priv_rate
,
598 struct net_device
*dev
,
600 struct ieee80211_tx_status
*tx_resp
)
604 int rs_index
, index
= 0;
605 struct iwl_rate_scale_priv
*lq
;
606 struct iwl_link_quality_cmd
*table
;
607 struct sta_info
*sta
;
608 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
609 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
610 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
611 struct iwl_rate_scale_data
*window
= NULL
;
612 struct iwl_rate_scale_data
*search_win
= NULL
;
613 struct iwl_rate tx_mcs
;
614 struct iwl_scale_tbl_info tbl_type
;
615 struct iwl_scale_tbl_info
*curr_tbl
, *search_tbl
;
617 u16 fc
= le16_to_cpu(hdr
->frame_control
);
620 IWL_DEBUG_RATE("get frame ack response, update rate scale window\n");
622 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
))
625 retries
= tx_resp
->retry_count
;
631 sta
= sta_info_get(local
, hdr
->addr1
);
633 if (!sta
|| !sta
->rate_ctrl_priv
) {
639 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
641 if (!priv
->lq_mngr
.lq_ready
)
644 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) && !lq
->ibss_sta_added
)
648 active_index
= lq
->active_tbl
;
650 lq
->antenna
= (lq
->valid_antenna
& local
->hw
.conf
.antenna_sel_tx
);
652 lq
->antenna
= lq
->valid_antenna
;
654 lq
->antenna
= lq
->valid_antenna
;
655 curr_tbl
= &(lq
->lq_info
[active_index
]);
656 search_tbl
= &(lq
->lq_info
[(1 - active_index
)]);
657 window
= (struct iwl_rate_scale_data
*)
659 search_win
= (struct iwl_rate_scale_data
*)
660 &(search_tbl
->win
[0]);
662 tx_mcs
.rate_n_flags
= tx_resp
->control
.tx_rate
;
664 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
665 &tbl_type
, &rs_index
);
666 if ((rs_index
< 0) || (rs_index
>= IWL_RATE_COUNT
)) {
667 IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n",
668 rs_index
, tx_mcs
.rate_n_flags
);
674 (tx_mcs
.rate_n_flags
!=
675 le32_to_cpu(table
->rs_table
[0].rate_n_flags
))) {
676 IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n",
678 le32_to_cpu(table
->rs_table
[0].rate_n_flags
));
684 tx_mcs
.rate_n_flags
=
685 le32_to_cpu(table
->rs_table
[index
].rate_n_flags
);
686 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
687 &tbl_type
, &rs_index
);
689 if ((tbl_type
.lq_type
== search_tbl
->lq_type
) &&
690 (tbl_type
.antenna_type
== search_tbl
->antenna_type
) &&
691 (tbl_type
.is_SGI
== search_tbl
->is_SGI
)) {
692 if (search_tbl
->expected_tpt
)
693 tpt
= search_tbl
->expected_tpt
[rs_index
];
696 rs_collect_tx_data(search_win
,
698 } else if ((tbl_type
.lq_type
== curr_tbl
->lq_type
) &&
699 (tbl_type
.antenna_type
== curr_tbl
->antenna_type
) &&
700 (tbl_type
.is_SGI
== curr_tbl
->is_SGI
)) {
701 if (curr_tbl
->expected_tpt
)
702 tpt
= curr_tbl
->expected_tpt
[rs_index
];
705 rs_collect_tx_data(window
, rs_index
, tpt
, 0);
714 if (!tx_resp
->retry_count
)
715 tx_mcs
.rate_n_flags
= tx_resp
->control
.tx_rate
;
717 tx_mcs
.rate_n_flags
=
718 le32_to_cpu(table
->rs_table
[index
].rate_n_flags
);
720 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
721 &tbl_type
, &rs_index
);
723 if (tx_resp
->flags
& IEEE80211_TX_STATUS_ACK
)
728 if ((tbl_type
.lq_type
== search_tbl
->lq_type
) &&
729 (tbl_type
.antenna_type
== search_tbl
->antenna_type
) &&
730 (tbl_type
.is_SGI
== search_tbl
->is_SGI
)) {
731 if (search_tbl
->expected_tpt
)
732 tpt
= search_tbl
->expected_tpt
[rs_index
];
735 rs_collect_tx_data(search_win
,
736 rs_index
, tpt
, status
);
737 } else if ((tbl_type
.lq_type
== curr_tbl
->lq_type
) &&
738 (tbl_type
.antenna_type
== curr_tbl
->antenna_type
) &&
739 (tbl_type
.is_SGI
== curr_tbl
->is_SGI
)) {
740 if (curr_tbl
->expected_tpt
)
741 tpt
= curr_tbl
->expected_tpt
[rs_index
];
744 rs_collect_tx_data(window
, rs_index
, tpt
, status
);
747 if (lq
->stay_in_tbl
) {
754 rs_rate_scale_perform(priv
, dev
, hdr
, sta
);
759 static u8
rs_is_ant_connected(u8 valid_antenna
,
760 enum iwl_antenna_type antenna_type
)
762 if (antenna_type
== ANT_AUX
)
763 return ((valid_antenna
& 0x2) ? 1:0);
764 else if (antenna_type
== ANT_MAIN
)
765 return ((valid_antenna
& 0x1) ? 1:0);
766 else if (antenna_type
== ANT_BOTH
) {
767 if ((valid_antenna
& 0x3) == 0x3)
776 static u8
rs_is_other_ant_connected(u8 valid_antenna
,
777 enum iwl_antenna_type antenna_type
)
779 if (antenna_type
== ANT_AUX
)
780 return (rs_is_ant_connected(valid_antenna
, ANT_MAIN
));
782 return (rs_is_ant_connected(valid_antenna
, ANT_AUX
));
787 static void rs_set_stay_in_table(u8 is_legacy
,
788 struct iwl_rate_scale_priv
*lq_data
)
790 IWL_DEBUG_HT("we are staying in the same table\n");
791 lq_data
->stay_in_tbl
= 1;
793 lq_data
->table_count_limit
= IWL_LEGACY_TABLE_COUNT
;
794 lq_data
->max_failure_limit
= IWL_LEGACY_FAILURE_LIMIT
;
795 lq_data
->max_success_limit
= IWL_LEGACY_TABLE_COUNT
;
797 lq_data
->table_count_limit
= IWL_NONE_LEGACY_TABLE_COUNT
;
798 lq_data
->max_failure_limit
= IWL_NONE_LEGACY_FAILURE_LIMIT
;
799 lq_data
->max_success_limit
= IWL_NONE_LEGACY_SUCCESS_LIMIT
;
801 lq_data
->table_count
= 0;
802 lq_data
->total_failed
= 0;
803 lq_data
->total_success
= 0;
806 static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv
*lq_data
,
807 struct iwl_scale_tbl_info
*tbl
)
809 if (is_legacy(tbl
->lq_type
)) {
810 if (!is_a_band(tbl
->lq_type
))
811 tbl
->expected_tpt
= expected_tpt_G
;
813 tbl
->expected_tpt
= expected_tpt_A
;
814 } else if (is_siso(tbl
->lq_type
)) {
815 if (tbl
->is_fat
&& !lq_data
->is_dup
)
817 tbl
->expected_tpt
= expected_tpt_siso40MHzSGI
;
819 tbl
->expected_tpt
= expected_tpt_siso40MHz
;
820 else if (tbl
->is_SGI
)
821 tbl
->expected_tpt
= expected_tpt_siso20MHzSGI
;
823 tbl
->expected_tpt
= expected_tpt_siso20MHz
;
825 } else if (is_mimo(tbl
->lq_type
)) {
826 if (tbl
->is_fat
&& !lq_data
->is_dup
)
828 tbl
->expected_tpt
= expected_tpt_mimo40MHzSGI
;
830 tbl
->expected_tpt
= expected_tpt_mimo40MHz
;
831 else if (tbl
->is_SGI
)
832 tbl
->expected_tpt
= expected_tpt_mimo20MHzSGI
;
834 tbl
->expected_tpt
= expected_tpt_mimo20MHz
;
836 tbl
->expected_tpt
= expected_tpt_G
;
839 #ifdef CONFIG_IWLWIFI_HT
840 static s32
rs_get_best_rate(struct iwl_priv
*priv
,
841 struct iwl_rate_scale_priv
*lq_data
,
842 struct iwl_scale_tbl_info
*tbl
,
843 u16 rate_mask
, s8 index
, s8 rate
)
845 struct iwl_scale_tbl_info
*active_tbl
=
846 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
847 s32 new_rate
, high
, low
, start_hi
;
848 s32 active_sr
= active_tbl
->win
[index
].success_ratio
;
849 s32
*tpt_tbl
= tbl
->expected_tpt
;
850 s32 active_tpt
= active_tbl
->expected_tpt
[index
];
853 new_rate
= high
= low
= start_hi
= IWL_RATE_INVALID
;
856 high_low
= rs_get_adjacent_rate(rate
, rate_mask
, tbl
->lq_type
);
858 low
= high_low
& 0xff;
859 high
= (high_low
>> 8) & 0xff;
861 if ((((100 * tpt_tbl
[rate
]) > lq_data
->last_tpt
) &&
862 ((active_sr
> IWL_RATE_DECREASE_TH
) &&
863 (active_sr
<= IWL_RATE_HIGH_TH
) &&
864 (tpt_tbl
[rate
] <= active_tpt
))) ||
865 ((active_sr
>= IWL_RATE_SCALE_SWITCH
) &&
866 (tpt_tbl
[rate
] > active_tpt
))) {
868 if (start_hi
!= IWL_RATE_INVALID
) {
873 if (low
!= IWL_RATE_INVALID
)
878 if (new_rate
!= IWL_RATE_INVALID
)
880 else if (high
!= IWL_RATE_INVALID
) {
892 #endif /* CONFIG_IWLWIFI_HT */
894 static inline u8
rs_is_both_ant_supp(u8 valid_antenna
)
896 return (rs_is_ant_connected(valid_antenna
, ANT_BOTH
));
899 static int rs_switch_to_mimo(struct iwl_priv
*priv
,
900 struct iwl_rate_scale_priv
*lq_data
,
901 struct iwl_scale_tbl_info
*tbl
, int index
)
904 #ifdef CONFIG_IWLWIFI_HT
907 s8 is_green
= lq_data
->is_green
;
909 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
912 IWL_DEBUG_HT("LQ: try to switch to MIMO\n");
913 tbl
->lq_type
= LQ_MIMO
;
914 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
,
917 if (priv
->current_assoc_ht
.tx_mimo_ps_mode
== IWL_MIMO_PS_STATIC
)
920 if (!rs_is_both_ant_supp(lq_data
->antenna
))
924 tbl
->is_dup
= lq_data
->is_dup
;
926 if (priv
->current_channel_width
== IWL_CHANNEL_WIDTH_40MHZ
)
932 if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_40MHZ_ONLY
)
936 } else if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_20MHZ_ONLY
)
941 rs_get_expected_tpt_table(lq_data
, tbl
);
943 rate
= rs_get_best_rate(priv
, lq_data
, tbl
, rate_mask
, index
, index
);
945 IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate
, rate_mask
);
946 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
))
948 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, rate
, is_green
);
950 IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
951 tbl
->current_rate
.rate_n_flags
, is_green
);
953 #endif /*CONFIG_IWLWIFI_HT */
957 static int rs_switch_to_siso(struct iwl_priv
*priv
,
958 struct iwl_rate_scale_priv
*lq_data
,
959 struct iwl_scale_tbl_info
*tbl
, int index
)
962 #ifdef CONFIG_IWLWIFI_HT
964 u8 is_green
= lq_data
->is_green
;
967 IWL_DEBUG_HT("LQ: try to switch to SISO\n");
968 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
972 tbl
->is_dup
= lq_data
->is_dup
;
973 tbl
->lq_type
= LQ_SISO
;
975 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
,
978 if (priv
->current_channel_width
== IWL_CHANNEL_WIDTH_40MHZ
)
984 if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_40MHZ_ONLY
)
988 } else if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_20MHZ_ONLY
)
996 rs_get_expected_tpt_table(lq_data
, tbl
);
997 rate
= rs_get_best_rate(priv
, lq_data
, tbl
, rate_mask
, index
, index
);
999 IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate
, rate_mask
);
1000 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
)) {
1001 IWL_DEBUG_HT("can not switch with index %d rate mask %x\n",
1005 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, rate
, is_green
);
1006 IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
1007 tbl
->current_rate
.rate_n_flags
, is_green
);
1009 #endif /*CONFIG_IWLWIFI_HT */
1013 static int rs_move_legacy_other(struct iwl_priv
*priv
,
1014 struct iwl_rate_scale_priv
*lq_data
,
1018 struct iwl_scale_tbl_info
*tbl
=
1019 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1020 struct iwl_scale_tbl_info
*search_tbl
=
1021 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1022 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1023 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1024 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1025 u8 start_action
= tbl
->action
;
1028 switch (tbl
->action
) {
1029 case IWL_LEGACY_SWITCH_ANTENNA
:
1030 IWL_DEBUG_HT("LQ Legacy switch Antenna\n");
1032 search_tbl
->lq_type
= LQ_NONE
;
1033 lq_data
->action_counter
++;
1034 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1036 if (!rs_is_other_ant_connected(lq_data
->antenna
,
1040 memcpy(search_tbl
, tbl
, sz
);
1042 rs_toggle_antenna(&(search_tbl
->current_rate
),
1044 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1045 lq_data
->search_better_tbl
= 1;
1048 case IWL_LEGACY_SWITCH_SISO
:
1049 IWL_DEBUG_HT("LQ: Legacy switch to SISO\n");
1050 memcpy(search_tbl
, tbl
, sz
);
1051 search_tbl
->lq_type
= LQ_SISO
;
1052 search_tbl
->is_SGI
= 0;
1053 search_tbl
->is_fat
= 0;
1054 rc
= rs_switch_to_siso(priv
, lq_data
, search_tbl
,
1057 lq_data
->search_better_tbl
= 1;
1058 lq_data
->action_counter
= 0;
1064 case IWL_LEGACY_SWITCH_MIMO
:
1065 IWL_DEBUG_HT("LQ: Legacy switch MIMO\n");
1066 memcpy(search_tbl
, tbl
, sz
);
1067 search_tbl
->lq_type
= LQ_MIMO
;
1068 search_tbl
->is_SGI
= 0;
1069 search_tbl
->is_fat
= 0;
1070 search_tbl
->antenna_type
= ANT_BOTH
;
1071 rc
= rs_switch_to_mimo(priv
, lq_data
, search_tbl
,
1074 lq_data
->search_better_tbl
= 1;
1075 lq_data
->action_counter
= 0;
1082 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO
)
1083 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA
;
1085 if (tbl
->action
== start_action
)
1093 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO
)
1094 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA
;
1099 static int rs_move_siso_to_other(struct iwl_priv
*priv
,
1100 struct iwl_rate_scale_priv
*lq_data
,
1104 u8 is_green
= lq_data
->is_green
;
1105 struct iwl_scale_tbl_info
*tbl
=
1106 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1107 struct iwl_scale_tbl_info
*search_tbl
=
1108 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1109 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1110 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1111 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1112 u8 start_action
= tbl
->action
;
1115 lq_data
->action_counter
++;
1116 switch (tbl
->action
) {
1117 case IWL_SISO_SWITCH_ANTENNA
:
1118 IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n");
1119 search_tbl
->lq_type
= LQ_NONE
;
1120 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1122 if (!rs_is_other_ant_connected(lq_data
->antenna
,
1126 memcpy(search_tbl
, tbl
, sz
);
1127 search_tbl
->action
= IWL_SISO_SWITCH_MIMO
;
1128 rs_toggle_antenna(&(search_tbl
->current_rate
),
1130 lq_data
->search_better_tbl
= 1;
1134 case IWL_SISO_SWITCH_MIMO
:
1135 IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n");
1136 memcpy(search_tbl
, tbl
, sz
);
1137 search_tbl
->lq_type
= LQ_MIMO
;
1138 search_tbl
->is_SGI
= 0;
1139 search_tbl
->is_fat
= 0;
1140 search_tbl
->antenna_type
= ANT_BOTH
;
1141 rc
= rs_switch_to_mimo(priv
, lq_data
, search_tbl
,
1144 lq_data
->search_better_tbl
= 1;
1149 case IWL_SISO_SWITCH_GI
:
1150 IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n");
1151 memcpy(search_tbl
, tbl
, sz
);
1152 search_tbl
->action
= 0;
1153 if (search_tbl
->is_SGI
)
1154 search_tbl
->is_SGI
= 0;
1156 search_tbl
->is_SGI
= 1;
1159 lq_data
->search_better_tbl
= 1;
1160 if ((tbl
->lq_type
== LQ_SISO
) &&
1162 s32 tpt
= lq_data
->last_tpt
/ 100;
1163 if (((!tbl
->is_fat
) &&
1164 (tpt
>= expected_tpt_siso20MHz
[index
])) ||
1166 (tpt
>= expected_tpt_siso40MHz
[index
])))
1167 lq_data
->search_better_tbl
= 0;
1169 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1170 rs_mcs_from_tbl(&search_tbl
->current_rate
,
1171 search_tbl
, index
, is_green
);
1175 if (tbl
->action
> IWL_SISO_SWITCH_GI
)
1176 tbl
->action
= IWL_SISO_SWITCH_ANTENNA
;
1178 if (tbl
->action
== start_action
)
1185 if (tbl
->action
> IWL_SISO_SWITCH_GI
)
1186 tbl
->action
= IWL_SISO_SWITCH_ANTENNA
;
1190 static int rs_move_mimo_to_other(struct iwl_priv
*priv
,
1191 struct iwl_rate_scale_priv
*lq_data
,
1195 s8 is_green
= lq_data
->is_green
;
1196 struct iwl_scale_tbl_info
*tbl
=
1197 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1198 struct iwl_scale_tbl_info
*search_tbl
=
1199 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1200 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1201 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1202 u8 start_action
= tbl
->action
;
1205 lq_data
->action_counter
++;
1206 switch (tbl
->action
) {
1207 case IWL_MIMO_SWITCH_ANTENNA_A
:
1208 case IWL_MIMO_SWITCH_ANTENNA_B
:
1209 IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n");
1210 memcpy(search_tbl
, tbl
, sz
);
1211 search_tbl
->lq_type
= LQ_SISO
;
1212 search_tbl
->is_SGI
= 0;
1213 search_tbl
->is_fat
= 0;
1214 if (tbl
->action
== IWL_MIMO_SWITCH_ANTENNA_A
)
1215 search_tbl
->antenna_type
= ANT_MAIN
;
1217 search_tbl
->antenna_type
= ANT_AUX
;
1219 rc
= rs_switch_to_siso(priv
, lq_data
, search_tbl
,
1222 lq_data
->search_better_tbl
= 1;
1227 case IWL_MIMO_SWITCH_GI
:
1228 IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n");
1229 memcpy(search_tbl
, tbl
, sz
);
1230 search_tbl
->lq_type
= LQ_MIMO
;
1231 search_tbl
->antenna_type
= ANT_BOTH
;
1232 search_tbl
->action
= 0;
1233 if (search_tbl
->is_SGI
)
1234 search_tbl
->is_SGI
= 0;
1236 search_tbl
->is_SGI
= 1;
1237 lq_data
->search_better_tbl
= 1;
1238 if ((tbl
->lq_type
== LQ_MIMO
) &&
1240 s32 tpt
= lq_data
->last_tpt
/ 100;
1241 if (((!tbl
->is_fat
) &&
1242 (tpt
>= expected_tpt_mimo20MHz
[index
])) ||
1244 (tpt
>= expected_tpt_mimo40MHz
[index
])))
1245 lq_data
->search_better_tbl
= 0;
1247 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1248 rs_mcs_from_tbl(&search_tbl
->current_rate
,
1249 search_tbl
, index
, is_green
);
1254 if (tbl
->action
> IWL_MIMO_SWITCH_GI
)
1255 tbl
->action
= IWL_MIMO_SWITCH_ANTENNA_A
;
1257 if (tbl
->action
== start_action
)
1264 if (tbl
->action
> IWL_MIMO_SWITCH_GI
)
1265 tbl
->action
= IWL_MIMO_SWITCH_ANTENNA_A
;
1270 static void rs_stay_in_table(struct iwl_rate_scale_priv
*lq_data
)
1272 struct iwl_scale_tbl_info
*tbl
;
1275 int flush_interval_passed
= 0;
1277 active_tbl
= lq_data
->active_tbl
;
1279 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1281 if (lq_data
->stay_in_tbl
) {
1283 if (lq_data
->flush_timer
)
1284 flush_interval_passed
=
1286 (unsigned long)(lq_data
->flush_timer
+
1287 IWL_RATE_SCALE_FLUSH_INTVL
));
1289 flush_interval_passed
= 0;
1290 if ((lq_data
->total_failed
> lq_data
->max_failure_limit
) ||
1291 (lq_data
->total_success
> lq_data
->max_success_limit
) ||
1292 ((!lq_data
->search_better_tbl
) && (lq_data
->flush_timer
)
1293 && (flush_interval_passed
))) {
1294 IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:",
1295 lq_data
->total_failed
,
1296 lq_data
->total_success
,
1297 flush_interval_passed
);
1298 lq_data
->stay_in_tbl
= 0;
1299 lq_data
->total_failed
= 0;
1300 lq_data
->total_success
= 0;
1301 lq_data
->flush_timer
= 0;
1302 } else if (lq_data
->table_count
> 0) {
1303 lq_data
->table_count
++;
1304 if (lq_data
->table_count
>=
1305 lq_data
->table_count_limit
) {
1306 lq_data
->table_count
= 0;
1308 IWL_DEBUG_HT("LQ: stay in table clear win\n");
1309 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1310 rs_rate_scale_clear_window(
1315 if (!lq_data
->stay_in_tbl
) {
1316 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1317 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
1322 static void rs_rate_scale_perform(struct iwl_priv
*priv
,
1323 struct net_device
*dev
,
1324 struct ieee80211_hdr
*hdr
,
1325 struct sta_info
*sta
)
1327 int low
= IWL_RATE_INVALID
;
1328 int high
= IWL_RATE_INVALID
;
1331 struct iwl_rate_scale_data
*window
= NULL
;
1332 int current_tpt
= IWL_INVALID_VALUE
;
1333 int low_tpt
= IWL_INVALID_VALUE
;
1334 int high_tpt
= IWL_INVALID_VALUE
;
1336 s8 scale_action
= 0;
1339 struct iwl_rate_scale_priv
*lq_data
;
1340 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
1341 u16 rate_scale_index_msk
= 0;
1342 struct iwl_rate mcs_rate
;
1348 IWL_DEBUG_RATE("rate scale calculate new rate for skb\n");
1350 fc
= le16_to_cpu(hdr
->frame_control
);
1351 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
)) {
1352 /* Send management frames and broadcast/multicast data using
1354 /* TODO: this could probably be improved.. */
1358 if (!sta
|| !sta
->rate_ctrl_priv
)
1361 if (!priv
->lq_mngr
.lq_ready
) {
1362 IWL_DEBUG_RATE("still rate scaling not ready\n");
1365 lq_data
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1367 if (!lq_data
->search_better_tbl
)
1368 active_tbl
= lq_data
->active_tbl
;
1370 active_tbl
= 1 - lq_data
->active_tbl
;
1372 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1373 is_green
= lq_data
->is_green
;
1375 index
= sta
->last_txrate
;
1377 IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index
,
1380 rs_get_supported_rates(lq_data
, hdr
, tbl
->lq_type
,
1383 IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask
);
1385 /* mask with station rate restriction */
1386 if (is_legacy(tbl
->lq_type
)) {
1387 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
1388 rate_scale_index_msk
= (u16
) (rate_mask
&
1389 (sta
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
1391 rate_scale_index_msk
= (u16
) (rate_mask
&
1395 rate_scale_index_msk
= rate_mask
;
1397 if (!rate_scale_index_msk
)
1398 rate_scale_index_msk
= rate_mask
;
1400 if (index
< 0 || !((1 << index
) & rate_scale_index_msk
)) {
1401 index
= IWL_INVALID_VALUE
;
1404 /* get the lowest availabe rate */
1405 for (i
= 0; i
<= IWL_RATE_COUNT
; i
++) {
1406 if ((1 << i
) & rate_scale_index_msk
)
1410 if (index
== IWL_INVALID_VALUE
) {
1411 IWL_WARNING("Can not find a suitable rate\n");
1416 if (!tbl
->expected_tpt
)
1417 rs_get_expected_tpt_table(lq_data
, tbl
);
1419 window
= &(tbl
->win
[index
]);
1421 fail_count
= window
->counter
- window
->success_counter
;
1422 if (((fail_count
< IWL_RATE_MIN_FAILURE_TH
) &&
1423 (window
->success_counter
< IWL_RATE_MIN_SUCCESS_TH
))
1424 || (tbl
->expected_tpt
== NULL
)) {
1425 IWL_DEBUG_RATE("LQ: still below TH succ %d total %d "
1427 window
->success_counter
, window
->counter
, index
);
1428 window
->average_tpt
= IWL_INVALID_VALUE
;
1429 rs_stay_in_table(lq_data
);
1431 rs_mcs_from_tbl(&mcs_rate
, tbl
, index
, is_green
);
1432 rs_fill_link_cmd(lq_data
, &mcs_rate
, &lq_data
->lq
, sta
);
1433 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1438 window
->average_tpt
= ((window
->success_ratio
*
1439 tbl
->expected_tpt
[index
] + 64) / 128);
1441 if (lq_data
->search_better_tbl
) {
1442 int success_limit
= IWL_RATE_SCALE_SWITCH
;
1444 if ((window
->success_ratio
> success_limit
) ||
1445 (window
->average_tpt
> lq_data
->last_tpt
)) {
1446 if (!is_legacy(tbl
->lq_type
)) {
1447 IWL_DEBUG_HT("LQ: we are switching to HT"
1448 " rate suc %d current tpt %d"
1450 window
->success_ratio
,
1451 window
->average_tpt
,
1453 lq_data
->enable_counter
= 1;
1455 lq_data
->active_tbl
= active_tbl
;
1456 current_tpt
= window
->average_tpt
;
1458 tbl
->lq_type
= LQ_NONE
;
1459 active_tbl
= lq_data
->active_tbl
;
1460 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1462 index
= iwl_rate_index_from_plcp(
1463 tbl
->current_rate
.rate_n_flags
);
1466 current_tpt
= lq_data
->last_tpt
;
1467 IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n");
1469 lq_data
->search_better_tbl
= 0;
1474 high_low
= rs_get_adjacent_rate(index
, rate_scale_index_msk
,
1476 low
= high_low
& 0xff;
1477 high
= (high_low
>> 8) & 0xff;
1479 current_tpt
= window
->average_tpt
;
1481 if (low
!= IWL_RATE_INVALID
)
1482 low_tpt
= tbl
->win
[low
].average_tpt
;
1484 if (high
!= IWL_RATE_INVALID
)
1485 high_tpt
= tbl
->win
[high
].average_tpt
;
1490 if ((window
->success_ratio
<= IWL_RATE_DECREASE_TH
) ||
1491 (current_tpt
== 0)) {
1492 IWL_DEBUG_RATE("decrease rate because of low success_ratio\n");
1494 } else if ((low_tpt
== IWL_INVALID_VALUE
) &&
1495 (high_tpt
== IWL_INVALID_VALUE
))
1497 else if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1498 (high_tpt
!= IWL_INVALID_VALUE
) &&
1499 (low_tpt
< current_tpt
) &&
1500 (high_tpt
< current_tpt
))
1503 if (high_tpt
!= IWL_INVALID_VALUE
) {
1504 if (high_tpt
> current_tpt
)
1508 ("decrease rate because of high tpt\n");
1511 } else if (low_tpt
!= IWL_INVALID_VALUE
) {
1512 if (low_tpt
> current_tpt
) {
1514 ("decrease rate because of low tpt\n");
1521 if (scale_action
== -1) {
1522 if ((low
!= IWL_RATE_INVALID
) &&
1523 ((window
->success_ratio
> IWL_RATE_HIGH_TH
) ||
1524 (current_tpt
> (100 * tbl
->expected_tpt
[low
]))))
1526 } else if ((scale_action
== 1) &&
1527 (window
->success_ratio
< IWL_RATE_INCREASE_TH
))
1530 switch (scale_action
) {
1532 if (low
!= IWL_RATE_INVALID
) {
1538 if (high
!= IWL_RATE_INVALID
) {
1549 IWL_DEBUG_HT("choose rate scale index %d action %d low %d "
1550 "high %d type %d\n",
1551 index
, scale_action
, low
, high
, tbl
->lq_type
);
1555 rs_mcs_from_tbl(&mcs_rate
, tbl
, index
, is_green
);
1556 rs_fill_link_cmd(lq_data
, &mcs_rate
, &lq_data
->lq
, sta
);
1557 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1559 rs_stay_in_table(lq_data
);
1561 if (!update_lq
&& !done_search
&& !lq_data
->stay_in_tbl
) {
1562 lq_data
->last_tpt
= current_tpt
;
1564 if (is_legacy(tbl
->lq_type
))
1565 rs_move_legacy_other(priv
, lq_data
, index
);
1566 else if (is_siso(tbl
->lq_type
))
1567 rs_move_siso_to_other(priv
, lq_data
, index
);
1569 rs_move_mimo_to_other(priv
, lq_data
, index
);
1571 if (lq_data
->search_better_tbl
) {
1572 tbl
= &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1573 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1574 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
1576 index
= iwl_rate_index_from_plcp(
1577 tbl
->current_rate
.rate_n_flags
);
1579 IWL_DEBUG_HT("Switch current mcs: %X index: %d\n",
1580 tbl
->current_rate
.rate_n_flags
, index
);
1581 rs_fill_link_cmd(lq_data
, &tbl
->current_rate
,
1582 &(lq_data
->lq
), sta
);
1583 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1585 tbl1
= &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1587 if (is_legacy(tbl1
->lq_type
) &&
1588 #ifdef CONFIG_IWLWIFI_HT
1589 !priv
->current_assoc_ht
.is_ht
&&
1591 (lq_data
->action_counter
>= 1)) {
1592 lq_data
->action_counter
= 0;
1593 IWL_DEBUG_HT("LQ: STAY in legacy table\n");
1594 rs_set_stay_in_table(1, lq_data
);
1597 if (lq_data
->enable_counter
&&
1598 (lq_data
->action_counter
>= IWL_ACTION_LIMIT
)) {
1599 #ifdef CONFIG_IWLWIFI_HT_AGG
1600 if ((lq_data
->last_tpt
> TID_AGG_TPT_THREHOLD
) &&
1601 (priv
->lq_mngr
.agg_ctrl
.auto_agg
)) {
1602 priv
->lq_mngr
.agg_ctrl
.tid_retry
=
1604 schedule_work(&priv
->agg_work
);
1606 #endif /*CONFIG_IWLWIFI_HT_AGG */
1607 lq_data
->action_counter
= 0;
1608 rs_set_stay_in_table(0, lq_data
);
1611 if ((!update_lq
) && (!done_search
) && (!lq_data
->flush_timer
))
1612 lq_data
->flush_timer
= jiffies
;
1616 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, index
, is_green
);
1618 sta
->last_txrate
= i
;
1620 /* sta->txrate is an index to A mode rates which start
1621 * at IWL_FIRST_OFDM_RATE
1623 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
1624 sta
->txrate
= i
- IWL_FIRST_OFDM_RATE
;
1632 static void rs_initialize_lq(struct iwl_priv
*priv
,
1633 struct sta_info
*sta
)
1636 struct iwl_rate_scale_priv
*lq
;
1637 struct iwl_scale_tbl_info
*tbl
;
1640 u8 use_green
= rs_use_green(priv
);
1641 struct iwl_rate mcs_rate
;
1643 if (!sta
|| !sta
->rate_ctrl_priv
)
1646 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1647 i
= sta
->last_txrate
;
1649 if ((lq
->lq
.sta_id
== 0xff) &&
1650 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
))
1653 if (!lq
->search_better_tbl
)
1654 active_tbl
= lq
->active_tbl
;
1656 active_tbl
= 1 - lq
->active_tbl
;
1658 tbl
= &(lq
->lq_info
[active_tbl
]);
1660 if ((i
< 0) || (i
>= IWL_RATE_COUNT
))
1663 mcs_rate
.rate_n_flags
= iwl_rates
[i
].plcp
;
1664 mcs_rate
.rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
1665 mcs_rate
.rate_n_flags
&= ~RATE_MCS_ANT_A_MSK
;
1667 if (i
>= IWL_FIRST_CCK_RATE
&& i
<= IWL_LAST_CCK_RATE
)
1668 mcs_rate
.rate_n_flags
|= RATE_MCS_CCK_MSK
;
1670 tbl
->antenna_type
= ANT_AUX
;
1671 rs_get_tbl_info_from_mcs(&mcs_rate
, priv
->phymode
, tbl
, &rate_idx
);
1672 if (!rs_is_ant_connected(priv
->valid_antenna
, tbl
->antenna_type
))
1673 rs_toggle_antenna(&mcs_rate
, tbl
),
1675 rs_mcs_from_tbl(&mcs_rate
, tbl
, rate_idx
, use_green
);
1676 tbl
->current_rate
.rate_n_flags
= mcs_rate
.rate_n_flags
;
1677 rs_get_expected_tpt_table(lq
, tbl
);
1678 rs_fill_link_cmd(lq
, &mcs_rate
, &(lq
->lq
), sta
);
1679 rs_send_lq_cmd(priv
, &lq
->lq
, CMD_ASYNC
);
1684 static struct ieee80211_rate
*rs_get_lowest_rate(struct ieee80211_local
1687 struct ieee80211_hw_mode
*mode
= local
->oper_hw_mode
;
1690 for (i
= 0; i
< mode
->num_rates
; i
++) {
1691 struct ieee80211_rate
*rate
= &mode
->rates
[i
];
1693 if (rate
->flags
& IEEE80211_RATE_SUPPORTED
)
1697 return &mode
->rates
[0];
1700 static struct ieee80211_rate
*rs_get_rate(void *priv_rate
,
1701 struct net_device
*dev
,
1702 struct sk_buff
*skb
,
1703 struct rate_control_extra
1708 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1709 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1710 struct sta_info
*sta
;
1712 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
1713 struct iwl_rate_scale_priv
*lq
;
1715 IWL_DEBUG_RATE("rate scale calculate new rate for skb\n");
1717 memset(extra
, 0, sizeof(*extra
));
1719 fc
= le16_to_cpu(hdr
->frame_control
);
1720 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
)) {
1721 /* Send management frames and broadcast/multicast data using
1723 /* TODO: this could probably be improved.. */
1724 return rs_get_lowest_rate(local
);
1727 sta
= sta_info_get(local
, hdr
->addr1
);
1729 if (!sta
|| !sta
->rate_ctrl_priv
) {
1732 return rs_get_lowest_rate(local
);
1735 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1736 i
= sta
->last_txrate
;
1738 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) && !lq
->ibss_sta_added
) {
1739 u8 sta_id
= iwl_hw_find_station(priv
, hdr
->addr1
);
1741 if (sta_id
== IWL_INVALID_STATION
) {
1742 IWL_DEBUG_RATE("LQ: ADD station " MAC_FMT
"\n",
1743 MAC_ARG(hdr
->addr1
));
1744 sta_id
= iwl_add_station(priv
,
1745 hdr
->addr1
, 0, CMD_ASYNC
);
1747 if ((sta_id
!= IWL_INVALID_STATION
)) {
1748 lq
->lq
.sta_id
= sta_id
;
1749 lq
->lq
.rs_table
[0].rate_n_flags
= 0;
1750 lq
->ibss_sta_added
= 1;
1751 rs_initialize_lq(priv
, sta
);
1753 if (!lq
->ibss_sta_added
)
1759 if ((i
< 0) || (i
> IWL_RATE_COUNT
))
1760 return rs_get_lowest_rate(local
);
1762 return &priv
->ieee_rates
[i
];
1765 static void *rs_alloc_sta(void *priv
, gfp_t gfp
)
1767 struct iwl_rate_scale_priv
*crl
;
1770 IWL_DEBUG_RATE("create station rate scale window\n");
1772 crl
= kzalloc(sizeof(struct iwl_rate_scale_priv
), gfp
);
1777 memset(crl
, 0, sizeof(struct iwl_rate_scale_priv
));
1778 crl
->lq
.sta_id
= 0xff;
1780 for (j
= 0; j
< LQ_SIZE
; j
++)
1781 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1782 rs_rate_scale_clear_window(&(crl
->lq_info
[j
].win
[i
]));
1787 static void rs_rate_init(void *priv_rate
, void *priv_sta
,
1788 struct ieee80211_local
*local
,
1789 struct sta_info
*sta
)
1792 struct ieee80211_hw_mode
*mode
= local
->oper_hw_mode
;
1793 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
1794 struct iwl_rate_scale_priv
*crl
= priv_sta
;
1796 memset(crl
, 0, sizeof(struct iwl_rate_scale_priv
));
1798 crl
->lq
.sta_id
= 0xff;
1799 crl
->flush_timer
= 0;
1801 for (j
= 0; j
< LQ_SIZE
; j
++)
1802 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1803 rs_rate_scale_clear_window(&(crl
->lq_info
[j
].win
[i
]));
1805 IWL_DEBUG_RATE("rate scale global init\n");
1806 /* TODO: what is a good starting rate for STA? About middle? Maybe not
1807 * the lowest or the highest rate.. Could consider using RSSI from
1808 * previous packets? Need to have IEEE 802.1X auth succeed immediately
1811 crl
->ibss_sta_added
= 0;
1812 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
) {
1813 u8 sta_id
= iwl_hw_find_station(priv
, sta
->addr
);
1814 /* for IBSS the call are from tasklet */
1815 IWL_DEBUG_HT("LQ: ADD station " MAC_FMT
" \n",
1816 MAC_ARG(sta
->addr
));
1818 if (sta_id
== IWL_INVALID_STATION
) {
1819 IWL_DEBUG_RATE("LQ: ADD station " MAC_FMT
"\n",
1820 MAC_ARG(sta
->addr
));
1821 sta_id
= iwl_add_station(priv
,
1822 sta
->addr
, 0, CMD_ASYNC
);
1824 if ((sta_id
!= IWL_INVALID_STATION
)) {
1825 crl
->lq
.sta_id
= sta_id
;
1826 crl
->lq
.rs_table
[0].rate_n_flags
= 0;
1828 /* FIXME: this is w/a remove it later */
1829 priv
->assoc_station_added
= 1;
1832 for (i
= 0; i
< mode
->num_rates
; i
++) {
1833 if ((sta
->supp_rates
& BIT(i
)) &&
1834 (mode
->rates
[i
].flags
& IEEE80211_RATE_SUPPORTED
))
1837 sta
->last_txrate
= sta
->txrate
;
1838 /* For MODE_IEEE80211A mode cck rate are at end
1841 if (local
->hw
.conf
.phymode
== MODE_IEEE80211A
)
1842 sta
->last_txrate
+= IWL_FIRST_OFDM_RATE
;
1844 crl
->is_dup
= priv
->is_dup
;
1845 crl
->valid_antenna
= priv
->valid_antenna
;
1846 crl
->antenna
= priv
->antenna
;
1847 crl
->is_green
= rs_use_green(priv
);
1848 crl
->active_rate
= priv
->active_rate
;
1849 crl
->active_rate
&= ~(0x1000);
1850 crl
->active_rate_basic
= priv
->active_rate_basic
;
1851 crl
->phymode
= priv
->phymode
;
1852 #ifdef CONFIG_IWLWIFI_HT
1853 crl
->active_siso_rate
= (priv
->current_assoc_ht
.supp_rates
[0] << 1);
1854 crl
->active_siso_rate
|= (priv
->current_assoc_ht
.supp_rates
[0] & 0x1);
1855 crl
->active_siso_rate
&= ~((u16
)0x2);
1856 crl
->active_siso_rate
= crl
->active_siso_rate
<< IWL_FIRST_OFDM_RATE
;
1858 crl
->active_mimo_rate
= (priv
->current_assoc_ht
.supp_rates
[1] << 1);
1859 crl
->active_mimo_rate
|= (priv
->current_assoc_ht
.supp_rates
[1] & 0x1);
1860 crl
->active_mimo_rate
&= ~((u16
)0x2);
1861 crl
->active_mimo_rate
= crl
->active_mimo_rate
<< IWL_FIRST_OFDM_RATE
;
1862 IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl
->active_siso_rate
,
1863 crl
->active_mimo_rate
);
1864 #endif /*CONFIG_IWLWIFI_HT*/
1866 if (priv
->assoc_station_added
)
1867 priv
->lq_mngr
.lq_ready
= 1;
1869 rs_initialize_lq(priv
, sta
);
1872 static int rs_fill_link_cmd(struct iwl_rate_scale_priv
*lq_data
,
1873 struct iwl_rate
*tx_mcs
,
1874 struct iwl_link_quality_cmd
*lq_cmd
,
1875 struct sta_info
*sta
)
1880 u8 ant_toggle_count
= 0;
1881 u8 use_ht_possible
= 1;
1882 u8 repeat_cur_rate
= 0;
1883 struct iwl_rate new_rate
;
1884 struct iwl_scale_tbl_info tbl_type
= { 0 };
1886 rs_get_tbl_info_from_mcs(tx_mcs
, lq_data
->phymode
,
1887 &tbl_type
, &rate_idx
);
1889 if (is_legacy(tbl_type
.lq_type
)) {
1890 ant_toggle_count
= 1;
1891 repeat_cur_rate
= IWL_NUMBER_TRY
;
1893 repeat_cur_rate
= IWL_HT_NUMBER_TRY
;
1895 lq_cmd
->general_params
.mimo_delimiter
=
1896 is_mimo(tbl_type
.lq_type
) ? 1 : 0;
1897 lq_cmd
->rs_table
[index
].rate_n_flags
=
1898 cpu_to_le32(tx_mcs
->rate_n_flags
);
1899 new_rate
.rate_n_flags
= tx_mcs
->rate_n_flags
;
1901 if (is_mimo(tbl_type
.lq_type
) || (tbl_type
.antenna_type
== ANT_MAIN
))
1902 lq_cmd
->general_params
.single_stream_ant_msk
= 1;
1904 lq_cmd
->general_params
.single_stream_ant_msk
= 2;
1909 while (index
< LINK_QUAL_MAX_RETRY_NUM
) {
1910 while (repeat_cur_rate
&& (index
< LINK_QUAL_MAX_RETRY_NUM
)) {
1911 if (is_legacy(tbl_type
.lq_type
)) {
1912 if (ant_toggle_count
<
1913 NUM_TRY_BEFORE_ANTENNA_TOGGLE
)
1916 rs_toggle_antenna(&new_rate
, &tbl_type
);
1917 ant_toggle_count
= 1;
1920 lq_cmd
->rs_table
[index
].rate_n_flags
=
1921 cpu_to_le32(new_rate
.rate_n_flags
);
1926 rs_get_tbl_info_from_mcs(&new_rate
, lq_data
->phymode
, &tbl_type
,
1929 if (is_mimo(tbl_type
.lq_type
))
1930 lq_cmd
->general_params
.mimo_delimiter
= index
;
1932 rs_get_lower_rate(lq_data
, &tbl_type
, rate_idx
,
1933 use_ht_possible
, &new_rate
, sta
);
1935 if (is_legacy(tbl_type
.lq_type
)) {
1936 if (ant_toggle_count
< NUM_TRY_BEFORE_ANTENNA_TOGGLE
)
1939 rs_toggle_antenna(&new_rate
, &tbl_type
);
1940 ant_toggle_count
= 1;
1942 repeat_cur_rate
= IWL_NUMBER_TRY
;
1944 repeat_cur_rate
= IWL_HT_NUMBER_TRY
;
1946 use_ht_possible
= 0;
1948 lq_cmd
->rs_table
[index
].rate_n_flags
=
1949 cpu_to_le32(new_rate
.rate_n_flags
);
1950 /* lq_cmd->rs_table[index].rate_n_flags = 0x800d; */
1956 /* lq_cmd->rs_table[0].rate_n_flags = 0x800d; */
1958 lq_cmd
->general_params
.dual_stream_ant_msk
= 3;
1959 lq_cmd
->agg_params
.agg_dis_start_th
= 3;
1960 lq_cmd
->agg_params
.agg_time_limit
= cpu_to_le16(4000);
1964 static void *rs_alloc(struct ieee80211_local
*local
)
1966 return local
->hw
.priv
;
1968 /* rate scale requires free function to be implemented */
1969 static void rs_free(void *priv_rate
)
1974 static void rs_clear(void *priv_rate
)
1976 struct iwl_priv
*priv
= (struct iwl_priv
*) priv_rate
;
1978 IWL_DEBUG_RATE("enter\n");
1980 priv
->lq_mngr
.lq_ready
= 0;
1981 #ifdef CONFIG_IWLWIFI_HT
1982 #ifdef CONFIG_IWLWIFI_HT_AGG
1983 if (priv
->lq_mngr
.agg_ctrl
.granted_ba
)
1984 iwl4965_turn_off_agg(priv
, TID_ALL_SPECIFIED
);
1985 #endif /*CONFIG_IWLWIFI_HT_AGG */
1986 #endif /* CONFIG_IWLWIFI_HT */
1988 IWL_DEBUG_RATE("leave\n");
1991 static void rs_free_sta(void *priv
, void *priv_sta
)
1993 struct iwl_rate_scale_priv
*rs_priv
= priv_sta
;
1995 IWL_DEBUG_RATE("enter\n");
1997 IWL_DEBUG_RATE("leave\n");
2001 static struct rate_control_ops rs_ops
= {
2004 .tx_status
= rs_tx_status
,
2005 .get_rate
= rs_get_rate
,
2006 .rate_init
= rs_rate_init
,
2010 .alloc_sta
= rs_alloc_sta
,
2011 .free_sta
= rs_free_sta
,
2014 int iwl_fill_rs_info(struct ieee80211_hw
*hw
, char *buf
, u8 sta_id
)
2016 struct ieee80211_local
*local
= hw_to_local(hw
);
2017 struct iwl_priv
*priv
= hw
->priv
;
2018 struct iwl_rate_scale_priv
*rs_priv
;
2019 struct sta_info
*sta
;
2021 u32 samples
= 0, success
= 0, good
= 0;
2022 unsigned long now
= jiffies
;
2024 u8 lq_type
, antenna
;
2026 sta
= sta_info_get(local
, priv
->stations
[sta_id
].sta
.sta
.addr
);
2027 if (!sta
|| !sta
->rate_ctrl_priv
) {
2030 IWL_DEBUG_RATE("leave - no private rate data!\n");
2032 IWL_DEBUG_RATE("leave - no station!\n");
2033 return sprintf(buf
, "station %d not found\n", sta_id
);
2036 rs_priv
= (void *)sta
->rate_ctrl_priv
;
2038 lq_type
= rs_priv
->lq_info
[rs_priv
->active_tbl
].lq_type
;
2039 antenna
= rs_priv
->lq_info
[rs_priv
->active_tbl
].antenna_type
;
2041 if (is_legacy(lq_type
))
2042 i
= IWL_RATE_54M_INDEX
;
2044 i
= IWL_RATE_60M_INDEX
;
2048 int active
= rs_priv
->active_tbl
;
2051 sprintf(&buf
[count
], " %2dMbs: ", iwl_rates
[i
].ieee
/ 2);
2053 mask
= (1ULL << (IWL_RATE_MAX_WINDOW
- 1));
2054 for (j
= 0; j
< IWL_RATE_MAX_WINDOW
; j
++, mask
>>= 1)
2056 (rs_priv
->lq_info
[active
].win
[i
].data
& mask
)
2059 samples
+= rs_priv
->lq_info
[active
].win
[i
].counter
;
2060 good
+= rs_priv
->lq_info
[active
].win
[i
].success_counter
;
2061 success
+= rs_priv
->lq_info
[active
].win
[i
].success_counter
*
2064 if (rs_priv
->lq_info
[active
].win
[i
].stamp
) {
2066 jiffies_to_msecs(now
-
2067 rs_priv
->lq_info
[active
].win
[i
].stamp
);
2069 if (delta
> max_time
)
2072 count
+= sprintf(&buf
[count
], "%5dms\n", delta
);
2074 buf
[count
++] = '\n';
2076 j
= iwl_get_prev_ieee_rate(i
);
2082 /* Display the average rate of all samples taken.
2084 * NOTE: We multiple # of samples by 2 since the IEEE measurement
2085 * added from iwl_rates is actually 2X the rate */
2087 count
+= sprintf(&buf
[count
],
2088 "\nAverage rate is %3d.%02dMbs over last %4dms\n"
2089 "%3d%% success (%d good packets over %d tries)\n",
2090 success
/ (2 * samples
), (success
* 5 / samples
) % 10,
2091 max_time
, good
* 100 / samples
, good
, samples
);
2093 count
+= sprintf(&buf
[count
], "\nAverage rate: 0Mbs\n");
2094 count
+= sprintf(&buf
[count
], "\nrate scale type %d anntena %d "
2095 "active_search %d rate index %d\n", lq_type
, antenna
,
2096 rs_priv
->search_better_tbl
, sta
->last_txrate
);
2102 void iwl_rate_scale_init(struct ieee80211_hw
*hw
, s32 sta_id
)
2104 struct iwl_priv
*priv
= hw
->priv
;
2106 priv
->lq_mngr
.lq_ready
= 1;
2109 void iwl_rate_control_register(struct ieee80211_hw
*hw
)
2111 ieee80211_rate_control_register(&rs_ops
);
2114 void iwl_rate_control_unregister(struct ieee80211_hw
*hw
)
2116 ieee80211_rate_control_unregister(&rs_ops
);