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>
44 #include "../net/mac80211/ieee80211_rate.h"
47 #include "iwl-helpers.h"
49 #define RS_NAME "iwl-4965-rs"
51 #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1
52 #define IWL_NUMBER_TRY 1
53 #define IWL_HT_NUMBER_TRY 3
55 #define IWL_RATE_MAX_WINDOW 62
56 #define IWL_RATE_HIGH_TH 10880
57 #define IWL_RATE_MIN_FAILURE_TH 6
58 #define IWL_RATE_MIN_SUCCESS_TH 8
59 #define IWL_RATE_DECREASE_TH 1920
60 #define IWL_RATE_INCREASE_TH 8960
61 #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */
63 static u8 rs_ht_to_legacy
[] = {
64 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
65 IWL_RATE_6M_INDEX
, IWL_RATE_6M_INDEX
,
67 IWL_RATE_6M_INDEX
, IWL_RATE_9M_INDEX
,
68 IWL_RATE_12M_INDEX
, IWL_RATE_18M_INDEX
,
69 IWL_RATE_24M_INDEX
, IWL_RATE_36M_INDEX
,
70 IWL_RATE_48M_INDEX
, IWL_RATE_54M_INDEX
75 } __attribute__ ((packed
));
77 struct iwl_rate_scale_data
{
86 struct iwl_scale_tbl_info
{
87 enum iwl_table_type lq_type
;
88 enum iwl_antenna_type antenna_type
;
94 struct iwl_rate current_rate
;
95 struct iwl_rate_scale_data win
[IWL_RATE_COUNT
];
98 struct iwl_rate_scale_priv
{
102 u8 search_better_tbl
;
104 u32 table_count_limit
;
105 u32 max_failure_limit
;
106 u32 max_success_limit
;
120 u16 active_siso_rate
;
121 u16 active_mimo_rate
;
122 u16 active_rate_basic
;
123 struct iwl_link_quality_cmd lq
;
124 struct iwl_scale_tbl_info lq_info
[LQ_SIZE
];
125 #ifdef CONFIG_MAC80211_DEBUGFS
126 struct dentry
*rs_sta_dbgfs_scale_table_file
;
130 static void rs_rate_scale_perform(struct iwl_priv
*priv
,
131 struct net_device
*dev
,
132 struct ieee80211_hdr
*hdr
,
133 struct sta_info
*sta
);
134 static int rs_fill_link_cmd(struct iwl_rate_scale_priv
*lq_data
,
135 struct iwl_rate
*tx_mcs
,
136 struct iwl_link_quality_cmd
*tbl
);
139 static s32 expected_tpt_A
[IWL_RATE_COUNT
] = {
140 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186
143 static s32 expected_tpt_G
[IWL_RATE_COUNT
] = {
144 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186
147 static s32 expected_tpt_siso20MHz
[IWL_RATE_COUNT
] = {
148 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202
151 static s32 expected_tpt_siso20MHzSGI
[IWL_RATE_COUNT
] = {
152 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211
155 static s32 expected_tpt_mimo20MHz
[IWL_RATE_COUNT
] = {
156 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251
159 static s32 expected_tpt_mimo20MHzSGI
[IWL_RATE_COUNT
] = {
160 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257
163 static s32 expected_tpt_siso40MHz
[IWL_RATE_COUNT
] = {
164 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257
167 static s32 expected_tpt_siso40MHzSGI
[IWL_RATE_COUNT
] = {
168 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264
171 static s32 expected_tpt_mimo40MHz
[IWL_RATE_COUNT
] = {
172 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289
175 static s32 expected_tpt_mimo40MHzSGI
[IWL_RATE_COUNT
] = {
176 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293
179 static int iwl_lq_sync_callback(struct iwl_priv
*priv
,
180 struct iwl_cmd
*cmd
, struct sk_buff
*skb
)
182 /*We didn't cache the SKB; let the caller free it */
186 static inline u8
iwl_rate_get_rate(u32 rate_n_flags
)
188 return (u8
)(rate_n_flags
& 0xFF);
191 static int rs_send_lq_cmd(struct iwl_priv
*priv
,
192 struct iwl_link_quality_cmd
*lq
, u8 flags
)
194 #ifdef CONFIG_IWLWIFI_DEBUG
199 struct iwl_host_cmd cmd
= {
200 .id
= REPLY_TX_LINK_QUALITY_CMD
,
201 .len
= sizeof(struct iwl_link_quality_cmd
),
206 if ((lq
->sta_id
== 0xFF) &&
207 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
))
210 if (lq
->sta_id
== 0xFF)
211 lq
->sta_id
= IWL_AP_ID
;
213 IWL_DEBUG_RATE("lq station id 0x%x\n", lq
->sta_id
);
214 IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
215 lq
->general_params
.single_stream_ant_msk
,
216 lq
->general_params
.dual_stream_ant_msk
);
217 #ifdef CONFIG_IWLWIFI_DEBUG
218 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++)
219 IWL_DEBUG_RATE("lq index %d 0x%X\n",
220 i
, lq
->rs_table
[i
].rate_n_flags
);
223 if (flags
& CMD_ASYNC
)
224 cmd
.meta
.u
.callback
= iwl_lq_sync_callback
;
226 if (iwl_is_associated(priv
) && priv
->assoc_station_added
&&
227 priv
->lq_mngr
.lq_ready
)
228 rc
= iwl_send_cmd(priv
, &cmd
);
233 static int rs_rate_scale_clear_window(struct iwl_rate_scale_data
*window
)
236 window
->success_counter
= 0;
237 window
->success_ratio
= IWL_INVALID_VALUE
;
239 window
->average_tpt
= IWL_INVALID_VALUE
;
245 static int rs_collect_tx_data(struct iwl_rate_scale_data
*windows
,
246 int scale_index
, s32 tpt
, u32 status
)
249 struct iwl_rate_scale_data
*window
= NULL
;
251 u8 win_size
= IWL_RATE_MAX_WINDOW
;
257 if (scale_index
>= IWL_RATE_COUNT
)
260 window
= &(windows
[scale_index
]);
262 if (window
->counter
>= win_size
) {
264 window
->counter
= win_size
- 1;
266 mask
= (mask
<< (win_size
- 1));
267 if ((window
->data
& mask
)) {
268 window
->data
&= ~mask
;
269 window
->success_counter
= window
->success_counter
- 1;
273 window
->counter
= window
->counter
+ 1;
275 window
->data
= (mask
<< 1);
277 window
->success_counter
= window
->success_counter
+ 1;
281 if (window
->counter
> 0)
282 window
->success_ratio
= 128 * (100 * window
->success_counter
)
285 window
->success_ratio
= IWL_INVALID_VALUE
;
287 fail_count
= window
->counter
- window
->success_counter
;
289 if ((fail_count
>= IWL_RATE_MIN_FAILURE_TH
) ||
290 (window
->success_counter
>= IWL_RATE_MIN_SUCCESS_TH
))
291 window
->average_tpt
= (window
->success_ratio
* tpt
+ 64) / 128;
293 window
->average_tpt
= IWL_INVALID_VALUE
;
295 window
->stamp
= jiffies
;
300 int static rs_mcs_from_tbl(struct iwl_rate
*mcs_rate
,
301 struct iwl_scale_tbl_info
*tbl
,
302 int index
, u8 use_green
)
306 if (is_legacy(tbl
->lq_type
)) {
307 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp
;
308 if (index
>= IWL_FIRST_CCK_RATE
&& index
<= IWL_LAST_CCK_RATE
)
309 mcs_rate
->rate_n_flags
|= RATE_MCS_CCK_MSK
;
311 } else if (is_siso(tbl
->lq_type
)) {
312 if (index
> IWL_LAST_OFDM_RATE
)
313 index
= IWL_LAST_OFDM_RATE
;
314 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp_siso
|
317 if (index
> IWL_LAST_OFDM_RATE
)
318 index
= IWL_LAST_OFDM_RATE
;
319 mcs_rate
->rate_n_flags
= iwl_rates
[index
].plcp_mimo
|
323 switch (tbl
->antenna_type
) {
325 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_AB_MSK
;
328 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_A_MSK
;
331 mcs_rate
->rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
337 if (is_legacy(tbl
->lq_type
))
342 mcs_rate
->rate_n_flags
|= RATE_MCS_DUP_MSK
;
344 mcs_rate
->rate_n_flags
|= RATE_MCS_FAT_MSK
;
347 mcs_rate
->rate_n_flags
|= RATE_MCS_SGI_MSK
;
350 mcs_rate
->rate_n_flags
|= RATE_MCS_GF_MSK
;
351 if (is_siso(tbl
->lq_type
))
352 mcs_rate
->rate_n_flags
&= ~RATE_MCS_SGI_MSK
;
357 static int rs_get_tbl_info_from_mcs(const struct iwl_rate
*mcs_rate
,
358 int phymode
, struct iwl_scale_tbl_info
*tbl
,
364 index
= iwl_rate_index_from_plcp(mcs_rate
->rate_n_flags
);
366 if (index
== IWL_RATE_INVALID
) {
373 tbl
->antenna_type
= ANT_BOTH
;
375 if (!(mcs_rate
->rate_n_flags
& RATE_MCS_HT_MSK
)) {
376 ant_msk
= (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_AB_MSK
);
378 if (ant_msk
== RATE_MCS_ANT_AB_MSK
)
379 tbl
->lq_type
= LQ_NONE
;
382 if (phymode
== MODE_IEEE80211A
)
387 if (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_A_MSK
)
388 tbl
->antenna_type
= ANT_MAIN
;
390 tbl
->antenna_type
= ANT_AUX
;
394 } else if (iwl_rate_get_rate(mcs_rate
->rate_n_flags
)
395 <= IWL_RATE_SISO_60M_PLCP
) {
396 tbl
->lq_type
= LQ_SISO
;
398 ant_msk
= (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_AB_MSK
);
399 if (ant_msk
== RATE_MCS_ANT_AB_MSK
)
400 tbl
->lq_type
= LQ_NONE
;
402 if (mcs_rate
->rate_n_flags
& RATE_MCS_ANT_A_MSK
)
403 tbl
->antenna_type
= ANT_MAIN
;
405 tbl
->antenna_type
= ANT_AUX
;
407 if (mcs_rate
->rate_n_flags
& RATE_MCS_SGI_MSK
)
410 if ((mcs_rate
->rate_n_flags
& RATE_MCS_FAT_MSK
) ||
411 (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
))
414 if (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
)
419 tbl
->lq_type
= LQ_MIMO
;
420 if (mcs_rate
->rate_n_flags
& RATE_MCS_SGI_MSK
)
423 if ((mcs_rate
->rate_n_flags
& RATE_MCS_FAT_MSK
) ||
424 (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
))
427 if (mcs_rate
->rate_n_flags
& RATE_MCS_DUP_MSK
)
434 static inline void rs_toggle_antenna(struct iwl_rate
*new_rate
,
435 struct iwl_scale_tbl_info
*tbl
)
437 if (tbl
->antenna_type
== ANT_AUX
) {
438 tbl
->antenna_type
= ANT_MAIN
;
439 new_rate
->rate_n_flags
&= ~RATE_MCS_ANT_B_MSK
;
440 new_rate
->rate_n_flags
|= RATE_MCS_ANT_A_MSK
;
442 tbl
->antenna_type
= ANT_AUX
;
443 new_rate
->rate_n_flags
&= ~RATE_MCS_ANT_A_MSK
;
444 new_rate
->rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
448 static inline s8
rs_use_green(struct iwl_priv
*priv
)
451 #ifdef CONFIG_IWLWIFI_HT
452 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
455 if ((priv
->current_assoc_ht
.is_green_field
) &&
456 !(priv
->current_assoc_ht
.operating_mode
& 0x4))
458 #endif /*CONFIG_IWLWIFI_HT */
463 * rs_get_supported_rates - get the available rates
465 * if management frame or broadcast frame only return
466 * basic available rates.
469 static void rs_get_supported_rates(struct iwl_rate_scale_priv
*lq_data
,
470 struct ieee80211_hdr
*hdr
,
471 enum iwl_table_type rate_type
,
474 if (is_legacy(rate_type
))
475 *data_rate
= lq_data
->active_rate
;
477 if (is_siso(rate_type
))
478 *data_rate
= lq_data
->active_siso_rate
;
480 *data_rate
= lq_data
->active_mimo_rate
;
483 if (hdr
&& is_multicast_ether_addr(hdr
->addr1
) &&
484 lq_data
->active_rate_basic
)
485 *data_rate
= lq_data
->active_rate_basic
;
488 static u16
rs_get_adjacent_rate(u8 index
, u16 rate_mask
, int rate_type
)
490 u8 high
= IWL_RATE_INVALID
;
491 u8 low
= IWL_RATE_INVALID
;
493 /* 802.11A or ht walks to the next literal adjascent rate in
495 if (is_a_band(rate_type
) || !is_legacy(rate_type
)) {
499 /* Find the previous rate that is in the rate mask */
501 for (mask
= (1 << i
); i
>= 0; i
--, mask
>>= 1) {
502 if (rate_mask
& mask
) {
508 /* Find the next rate that is in the rate mask */
510 for (mask
= (1 << i
); i
< IWL_RATE_COUNT
; i
++, mask
<<= 1) {
511 if (rate_mask
& mask
) {
517 return (high
<< 8) | low
;
521 while (low
!= IWL_RATE_INVALID
) {
522 low
= iwl_rates
[low
].prev_rs
;
523 if (low
== IWL_RATE_INVALID
)
525 if (rate_mask
& (1 << low
))
527 IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low
);
531 while (high
!= IWL_RATE_INVALID
) {
532 high
= iwl_rates
[high
].next_rs
;
533 if (high
== IWL_RATE_INVALID
)
535 if (rate_mask
& (1 << high
))
537 IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high
);
540 return (high
<< 8) | low
;
543 static int rs_get_lower_rate(struct iwl_rate_scale_priv
*lq_data
,
544 struct iwl_scale_tbl_info
*tbl
, u8 scale_index
,
545 u8 ht_possible
, struct iwl_rate
*mcs_rate
)
550 u8 switch_to_legacy
= 0;
551 u8 is_green
= lq_data
->is_green
;
553 /* check if we need to switch from HT to legacy rates.
554 * assumption is that mandatory rates (1Mbps or 6Mbps)
555 * are always supported (spec demand) */
556 if (!is_legacy(tbl
->lq_type
) && (!ht_possible
|| !scale_index
)) {
557 switch_to_legacy
= 1;
558 scale_index
= rs_ht_to_legacy
[scale_index
];
559 if (lq_data
->phymode
== MODE_IEEE80211A
)
564 if ((tbl
->antenna_type
== ANT_BOTH
) ||
565 (tbl
->antenna_type
== ANT_NONE
))
566 tbl
->antenna_type
= ANT_MAIN
;
572 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
, &rate_mask
);
574 /* mask with station rate restriction */
575 if (is_legacy(tbl
->lq_type
)) {
576 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
577 rate_mask
= (u16
)(rate_mask
&
578 (lq_data
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
580 rate_mask
= (u16
)(rate_mask
& lq_data
->supp_rates
);
583 /* if we did switched from HT to legacy check current rate */
584 if ((switch_to_legacy
) &&
585 (rate_mask
& (1 << scale_index
))) {
586 rs_mcs_from_tbl(mcs_rate
, tbl
, scale_index
, is_green
);
590 high_low
= rs_get_adjacent_rate(scale_index
, rate_mask
, tbl
->lq_type
);
591 low
= high_low
& 0xff;
593 if (low
!= IWL_RATE_INVALID
)
594 rs_mcs_from_tbl(mcs_rate
, tbl
, low
, is_green
);
596 rs_mcs_from_tbl(mcs_rate
, tbl
, scale_index
, is_green
);
601 static void rs_tx_status(void *priv_rate
,
602 struct net_device
*dev
,
604 struct ieee80211_tx_status
*tx_resp
)
608 int rs_index
, index
= 0;
609 struct iwl_rate_scale_priv
*lq
;
610 struct iwl_link_quality_cmd
*table
;
611 struct sta_info
*sta
;
612 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
613 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
614 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
615 struct iwl_rate_scale_data
*window
= NULL
;
616 struct iwl_rate_scale_data
*search_win
= NULL
;
617 struct iwl_rate tx_mcs
;
618 struct iwl_scale_tbl_info tbl_type
;
619 struct iwl_scale_tbl_info
*curr_tbl
, *search_tbl
;
621 u16 fc
= le16_to_cpu(hdr
->frame_control
);
624 IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n");
626 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
))
629 retries
= tx_resp
->retry_count
;
635 sta
= sta_info_get(local
, hdr
->addr1
);
637 if (!sta
|| !sta
->rate_ctrl_priv
) {
643 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
645 if (!priv
->lq_mngr
.lq_ready
)
648 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) && !lq
->ibss_sta_added
)
652 active_index
= lq
->active_tbl
;
654 lq
->antenna
= (lq
->valid_antenna
& local
->hw
.conf
.antenna_sel_tx
);
656 lq
->antenna
= lq
->valid_antenna
;
658 lq
->antenna
= lq
->valid_antenna
;
659 curr_tbl
= &(lq
->lq_info
[active_index
]);
660 search_tbl
= &(lq
->lq_info
[(1 - active_index
)]);
661 window
= (struct iwl_rate_scale_data
*)
663 search_win
= (struct iwl_rate_scale_data
*)
664 &(search_tbl
->win
[0]);
666 tx_mcs
.rate_n_flags
= tx_resp
->control
.tx_rate
;
668 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
669 &tbl_type
, &rs_index
);
670 if ((rs_index
< 0) || (rs_index
>= IWL_RATE_COUNT
)) {
671 IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n",
672 rs_index
, tx_mcs
.rate_n_flags
);
678 (tx_mcs
.rate_n_flags
!=
679 le32_to_cpu(table
->rs_table
[0].rate_n_flags
))) {
680 IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n",
682 le32_to_cpu(table
->rs_table
[0].rate_n_flags
));
688 tx_mcs
.rate_n_flags
=
689 le32_to_cpu(table
->rs_table
[index
].rate_n_flags
);
690 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
691 &tbl_type
, &rs_index
);
693 if ((tbl_type
.lq_type
== search_tbl
->lq_type
) &&
694 (tbl_type
.antenna_type
== search_tbl
->antenna_type
) &&
695 (tbl_type
.is_SGI
== search_tbl
->is_SGI
)) {
696 if (search_tbl
->expected_tpt
)
697 tpt
= search_tbl
->expected_tpt
[rs_index
];
700 rs_collect_tx_data(search_win
,
702 } else if ((tbl_type
.lq_type
== curr_tbl
->lq_type
) &&
703 (tbl_type
.antenna_type
== curr_tbl
->antenna_type
) &&
704 (tbl_type
.is_SGI
== curr_tbl
->is_SGI
)) {
705 if (curr_tbl
->expected_tpt
)
706 tpt
= curr_tbl
->expected_tpt
[rs_index
];
709 rs_collect_tx_data(window
, rs_index
, tpt
, 0);
718 if (!tx_resp
->retry_count
)
719 tx_mcs
.rate_n_flags
= tx_resp
->control
.tx_rate
;
721 tx_mcs
.rate_n_flags
=
722 le32_to_cpu(table
->rs_table
[index
].rate_n_flags
);
724 rs_get_tbl_info_from_mcs(&tx_mcs
, priv
->phymode
,
725 &tbl_type
, &rs_index
);
727 if (tx_resp
->flags
& IEEE80211_TX_STATUS_ACK
)
732 if ((tbl_type
.lq_type
== search_tbl
->lq_type
) &&
733 (tbl_type
.antenna_type
== search_tbl
->antenna_type
) &&
734 (tbl_type
.is_SGI
== search_tbl
->is_SGI
)) {
735 if (search_tbl
->expected_tpt
)
736 tpt
= search_tbl
->expected_tpt
[rs_index
];
739 rs_collect_tx_data(search_win
,
740 rs_index
, tpt
, status
);
741 } else if ((tbl_type
.lq_type
== curr_tbl
->lq_type
) &&
742 (tbl_type
.antenna_type
== curr_tbl
->antenna_type
) &&
743 (tbl_type
.is_SGI
== curr_tbl
->is_SGI
)) {
744 if (curr_tbl
->expected_tpt
)
745 tpt
= curr_tbl
->expected_tpt
[rs_index
];
748 rs_collect_tx_data(window
, rs_index
, tpt
, status
);
751 if (lq
->stay_in_tbl
) {
758 rs_rate_scale_perform(priv
, dev
, hdr
, sta
);
763 static u8
rs_is_ant_connected(u8 valid_antenna
,
764 enum iwl_antenna_type antenna_type
)
766 if (antenna_type
== ANT_AUX
)
767 return ((valid_antenna
& 0x2) ? 1:0);
768 else if (antenna_type
== ANT_MAIN
)
769 return ((valid_antenna
& 0x1) ? 1:0);
770 else if (antenna_type
== ANT_BOTH
) {
771 if ((valid_antenna
& 0x3) == 0x3)
780 static u8
rs_is_other_ant_connected(u8 valid_antenna
,
781 enum iwl_antenna_type antenna_type
)
783 if (antenna_type
== ANT_AUX
)
784 return (rs_is_ant_connected(valid_antenna
, ANT_MAIN
));
786 return (rs_is_ant_connected(valid_antenna
, ANT_AUX
));
791 static void rs_set_stay_in_table(u8 is_legacy
,
792 struct iwl_rate_scale_priv
*lq_data
)
794 IWL_DEBUG_HT("we are staying in the same table\n");
795 lq_data
->stay_in_tbl
= 1;
797 lq_data
->table_count_limit
= IWL_LEGACY_TABLE_COUNT
;
798 lq_data
->max_failure_limit
= IWL_LEGACY_FAILURE_LIMIT
;
799 lq_data
->max_success_limit
= IWL_LEGACY_TABLE_COUNT
;
801 lq_data
->table_count_limit
= IWL_NONE_LEGACY_TABLE_COUNT
;
802 lq_data
->max_failure_limit
= IWL_NONE_LEGACY_FAILURE_LIMIT
;
803 lq_data
->max_success_limit
= IWL_NONE_LEGACY_SUCCESS_LIMIT
;
805 lq_data
->table_count
= 0;
806 lq_data
->total_failed
= 0;
807 lq_data
->total_success
= 0;
810 static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv
*lq_data
,
811 struct iwl_scale_tbl_info
*tbl
)
813 if (is_legacy(tbl
->lq_type
)) {
814 if (!is_a_band(tbl
->lq_type
))
815 tbl
->expected_tpt
= expected_tpt_G
;
817 tbl
->expected_tpt
= expected_tpt_A
;
818 } else if (is_siso(tbl
->lq_type
)) {
819 if (tbl
->is_fat
&& !lq_data
->is_dup
)
821 tbl
->expected_tpt
= expected_tpt_siso40MHzSGI
;
823 tbl
->expected_tpt
= expected_tpt_siso40MHz
;
824 else if (tbl
->is_SGI
)
825 tbl
->expected_tpt
= expected_tpt_siso20MHzSGI
;
827 tbl
->expected_tpt
= expected_tpt_siso20MHz
;
829 } else if (is_mimo(tbl
->lq_type
)) {
830 if (tbl
->is_fat
&& !lq_data
->is_dup
)
832 tbl
->expected_tpt
= expected_tpt_mimo40MHzSGI
;
834 tbl
->expected_tpt
= expected_tpt_mimo40MHz
;
835 else if (tbl
->is_SGI
)
836 tbl
->expected_tpt
= expected_tpt_mimo20MHzSGI
;
838 tbl
->expected_tpt
= expected_tpt_mimo20MHz
;
840 tbl
->expected_tpt
= expected_tpt_G
;
843 #ifdef CONFIG_IWLWIFI_HT
844 static s32
rs_get_best_rate(struct iwl_priv
*priv
,
845 struct iwl_rate_scale_priv
*lq_data
,
846 struct iwl_scale_tbl_info
*tbl
,
847 u16 rate_mask
, s8 index
, s8 rate
)
849 struct iwl_scale_tbl_info
*active_tbl
=
850 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
851 s32 new_rate
, high
, low
, start_hi
;
852 s32 active_sr
= active_tbl
->win
[index
].success_ratio
;
853 s32
*tpt_tbl
= tbl
->expected_tpt
;
854 s32 active_tpt
= active_tbl
->expected_tpt
[index
];
857 new_rate
= high
= low
= start_hi
= IWL_RATE_INVALID
;
860 high_low
= rs_get_adjacent_rate(rate
, rate_mask
, tbl
->lq_type
);
862 low
= high_low
& 0xff;
863 high
= (high_low
>> 8) & 0xff;
865 if ((((100 * tpt_tbl
[rate
]) > lq_data
->last_tpt
) &&
866 ((active_sr
> IWL_RATE_DECREASE_TH
) &&
867 (active_sr
<= IWL_RATE_HIGH_TH
) &&
868 (tpt_tbl
[rate
] <= active_tpt
))) ||
869 ((active_sr
>= IWL_RATE_SCALE_SWITCH
) &&
870 (tpt_tbl
[rate
] > active_tpt
))) {
872 if (start_hi
!= IWL_RATE_INVALID
) {
877 if (low
!= IWL_RATE_INVALID
)
882 if (new_rate
!= IWL_RATE_INVALID
)
884 else if (high
!= IWL_RATE_INVALID
) {
896 #endif /* CONFIG_IWLWIFI_HT */
898 static inline u8
rs_is_both_ant_supp(u8 valid_antenna
)
900 return (rs_is_ant_connected(valid_antenna
, ANT_BOTH
));
903 static int rs_switch_to_mimo(struct iwl_priv
*priv
,
904 struct iwl_rate_scale_priv
*lq_data
,
905 struct iwl_scale_tbl_info
*tbl
, int index
)
908 #ifdef CONFIG_IWLWIFI_HT
911 s8 is_green
= lq_data
->is_green
;
913 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
916 IWL_DEBUG_HT("LQ: try to switch to MIMO\n");
917 tbl
->lq_type
= LQ_MIMO
;
918 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
,
921 if (priv
->current_assoc_ht
.tx_mimo_ps_mode
== IWL_MIMO_PS_STATIC
)
924 if (!rs_is_both_ant_supp(lq_data
->antenna
))
928 tbl
->is_dup
= lq_data
->is_dup
;
930 if (priv
->current_channel_width
== IWL_CHANNEL_WIDTH_40MHZ
)
936 if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_40MHZ_ONLY
)
940 } else if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_20MHZ_ONLY
)
945 rs_get_expected_tpt_table(lq_data
, tbl
);
947 rate
= rs_get_best_rate(priv
, lq_data
, tbl
, rate_mask
, index
, index
);
949 IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate
, rate_mask
);
950 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
))
952 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, rate
, is_green
);
954 IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
955 tbl
->current_rate
.rate_n_flags
, is_green
);
957 #endif /*CONFIG_IWLWIFI_HT */
961 static int rs_switch_to_siso(struct iwl_priv
*priv
,
962 struct iwl_rate_scale_priv
*lq_data
,
963 struct iwl_scale_tbl_info
*tbl
, int index
)
966 #ifdef CONFIG_IWLWIFI_HT
968 u8 is_green
= lq_data
->is_green
;
971 IWL_DEBUG_HT("LQ: try to switch to SISO\n");
972 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
)
976 tbl
->is_dup
= lq_data
->is_dup
;
977 tbl
->lq_type
= LQ_SISO
;
979 rs_get_supported_rates(lq_data
, NULL
, tbl
->lq_type
,
982 if (priv
->current_channel_width
== IWL_CHANNEL_WIDTH_40MHZ
)
988 if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_40MHZ_ONLY
)
992 } else if (priv
->current_assoc_ht
.sgf
& HT_SHORT_GI_20MHZ_ONLY
)
1000 rs_get_expected_tpt_table(lq_data
, tbl
);
1001 rate
= rs_get_best_rate(priv
, lq_data
, tbl
, rate_mask
, index
, index
);
1003 IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate
, rate_mask
);
1004 if ((rate
== IWL_RATE_INVALID
) || !((1 << rate
) & rate_mask
)) {
1005 IWL_DEBUG_HT("can not switch with index %d rate mask %x\n",
1009 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, rate
, is_green
);
1010 IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
1011 tbl
->current_rate
.rate_n_flags
, is_green
);
1013 #endif /*CONFIG_IWLWIFI_HT */
1017 static int rs_move_legacy_other(struct iwl_priv
*priv
,
1018 struct iwl_rate_scale_priv
*lq_data
,
1022 struct iwl_scale_tbl_info
*tbl
=
1023 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1024 struct iwl_scale_tbl_info
*search_tbl
=
1025 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1026 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1027 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1028 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1029 u8 start_action
= tbl
->action
;
1032 switch (tbl
->action
) {
1033 case IWL_LEGACY_SWITCH_ANTENNA
:
1034 IWL_DEBUG_HT("LQ Legacy switch Antenna\n");
1036 search_tbl
->lq_type
= LQ_NONE
;
1037 lq_data
->action_counter
++;
1038 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1040 if (!rs_is_other_ant_connected(lq_data
->antenna
,
1044 memcpy(search_tbl
, tbl
, sz
);
1046 rs_toggle_antenna(&(search_tbl
->current_rate
),
1048 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1049 lq_data
->search_better_tbl
= 1;
1052 case IWL_LEGACY_SWITCH_SISO
:
1053 IWL_DEBUG_HT("LQ: Legacy switch to SISO\n");
1054 memcpy(search_tbl
, tbl
, sz
);
1055 search_tbl
->lq_type
= LQ_SISO
;
1056 search_tbl
->is_SGI
= 0;
1057 search_tbl
->is_fat
= 0;
1058 rc
= rs_switch_to_siso(priv
, lq_data
, search_tbl
,
1061 lq_data
->search_better_tbl
= 1;
1062 lq_data
->action_counter
= 0;
1068 case IWL_LEGACY_SWITCH_MIMO
:
1069 IWL_DEBUG_HT("LQ: Legacy switch MIMO\n");
1070 memcpy(search_tbl
, tbl
, sz
);
1071 search_tbl
->lq_type
= LQ_MIMO
;
1072 search_tbl
->is_SGI
= 0;
1073 search_tbl
->is_fat
= 0;
1074 search_tbl
->antenna_type
= ANT_BOTH
;
1075 rc
= rs_switch_to_mimo(priv
, lq_data
, search_tbl
,
1078 lq_data
->search_better_tbl
= 1;
1079 lq_data
->action_counter
= 0;
1086 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO
)
1087 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA
;
1089 if (tbl
->action
== start_action
)
1097 if (tbl
->action
> IWL_LEGACY_SWITCH_MIMO
)
1098 tbl
->action
= IWL_LEGACY_SWITCH_ANTENNA
;
1103 static int rs_move_siso_to_other(struct iwl_priv
*priv
,
1104 struct iwl_rate_scale_priv
*lq_data
,
1108 u8 is_green
= lq_data
->is_green
;
1109 struct iwl_scale_tbl_info
*tbl
=
1110 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1111 struct iwl_scale_tbl_info
*search_tbl
=
1112 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1113 struct iwl_rate_scale_data
*window
= &(tbl
->win
[index
]);
1114 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1115 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1116 u8 start_action
= tbl
->action
;
1119 lq_data
->action_counter
++;
1120 switch (tbl
->action
) {
1121 case IWL_SISO_SWITCH_ANTENNA
:
1122 IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n");
1123 search_tbl
->lq_type
= LQ_NONE
;
1124 if (window
->success_ratio
>= IWL_RS_GOOD_RATIO
)
1126 if (!rs_is_other_ant_connected(lq_data
->antenna
,
1130 memcpy(search_tbl
, tbl
, sz
);
1131 search_tbl
->action
= IWL_SISO_SWITCH_MIMO
;
1132 rs_toggle_antenna(&(search_tbl
->current_rate
),
1134 lq_data
->search_better_tbl
= 1;
1138 case IWL_SISO_SWITCH_MIMO
:
1139 IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n");
1140 memcpy(search_tbl
, tbl
, sz
);
1141 search_tbl
->lq_type
= LQ_MIMO
;
1142 search_tbl
->is_SGI
= 0;
1143 search_tbl
->is_fat
= 0;
1144 search_tbl
->antenna_type
= ANT_BOTH
;
1145 rc
= rs_switch_to_mimo(priv
, lq_data
, search_tbl
,
1148 lq_data
->search_better_tbl
= 1;
1153 case IWL_SISO_SWITCH_GI
:
1154 IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n");
1155 memcpy(search_tbl
, tbl
, sz
);
1156 search_tbl
->action
= 0;
1157 if (search_tbl
->is_SGI
)
1158 search_tbl
->is_SGI
= 0;
1160 search_tbl
->is_SGI
= 1;
1163 lq_data
->search_better_tbl
= 1;
1164 if ((tbl
->lq_type
== LQ_SISO
) &&
1166 s32 tpt
= lq_data
->last_tpt
/ 100;
1167 if (((!tbl
->is_fat
) &&
1168 (tpt
>= expected_tpt_siso20MHz
[index
])) ||
1170 (tpt
>= expected_tpt_siso40MHz
[index
])))
1171 lq_data
->search_better_tbl
= 0;
1173 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1174 rs_mcs_from_tbl(&search_tbl
->current_rate
,
1175 search_tbl
, index
, is_green
);
1179 if (tbl
->action
> IWL_SISO_SWITCH_GI
)
1180 tbl
->action
= IWL_SISO_SWITCH_ANTENNA
;
1182 if (tbl
->action
== start_action
)
1189 if (tbl
->action
> IWL_SISO_SWITCH_GI
)
1190 tbl
->action
= IWL_SISO_SWITCH_ANTENNA
;
1194 static int rs_move_mimo_to_other(struct iwl_priv
*priv
,
1195 struct iwl_rate_scale_priv
*lq_data
,
1199 s8 is_green
= lq_data
->is_green
;
1200 struct iwl_scale_tbl_info
*tbl
=
1201 &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1202 struct iwl_scale_tbl_info
*search_tbl
=
1203 &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1204 u32 sz
= (sizeof(struct iwl_scale_tbl_info
) -
1205 (sizeof(struct iwl_rate_scale_data
) * IWL_RATE_COUNT
));
1206 u8 start_action
= tbl
->action
;
1209 lq_data
->action_counter
++;
1210 switch (tbl
->action
) {
1211 case IWL_MIMO_SWITCH_ANTENNA_A
:
1212 case IWL_MIMO_SWITCH_ANTENNA_B
:
1213 IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n");
1214 memcpy(search_tbl
, tbl
, sz
);
1215 search_tbl
->lq_type
= LQ_SISO
;
1216 search_tbl
->is_SGI
= 0;
1217 search_tbl
->is_fat
= 0;
1218 if (tbl
->action
== IWL_MIMO_SWITCH_ANTENNA_A
)
1219 search_tbl
->antenna_type
= ANT_MAIN
;
1221 search_tbl
->antenna_type
= ANT_AUX
;
1223 rc
= rs_switch_to_siso(priv
, lq_data
, search_tbl
,
1226 lq_data
->search_better_tbl
= 1;
1231 case IWL_MIMO_SWITCH_GI
:
1232 IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n");
1233 memcpy(search_tbl
, tbl
, sz
);
1234 search_tbl
->lq_type
= LQ_MIMO
;
1235 search_tbl
->antenna_type
= ANT_BOTH
;
1236 search_tbl
->action
= 0;
1237 if (search_tbl
->is_SGI
)
1238 search_tbl
->is_SGI
= 0;
1240 search_tbl
->is_SGI
= 1;
1241 lq_data
->search_better_tbl
= 1;
1242 if ((tbl
->lq_type
== LQ_MIMO
) &&
1244 s32 tpt
= lq_data
->last_tpt
/ 100;
1245 if (((!tbl
->is_fat
) &&
1246 (tpt
>= expected_tpt_mimo20MHz
[index
])) ||
1248 (tpt
>= expected_tpt_mimo40MHz
[index
])))
1249 lq_data
->search_better_tbl
= 0;
1251 rs_get_expected_tpt_table(lq_data
, search_tbl
);
1252 rs_mcs_from_tbl(&search_tbl
->current_rate
,
1253 search_tbl
, index
, is_green
);
1258 if (tbl
->action
> IWL_MIMO_SWITCH_GI
)
1259 tbl
->action
= IWL_MIMO_SWITCH_ANTENNA_A
;
1261 if (tbl
->action
== start_action
)
1268 if (tbl
->action
> IWL_MIMO_SWITCH_GI
)
1269 tbl
->action
= IWL_MIMO_SWITCH_ANTENNA_A
;
1274 static void rs_stay_in_table(struct iwl_rate_scale_priv
*lq_data
)
1276 struct iwl_scale_tbl_info
*tbl
;
1279 int flush_interval_passed
= 0;
1281 active_tbl
= lq_data
->active_tbl
;
1283 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1285 if (lq_data
->stay_in_tbl
) {
1287 if (lq_data
->flush_timer
)
1288 flush_interval_passed
=
1290 (unsigned long)(lq_data
->flush_timer
+
1291 IWL_RATE_SCALE_FLUSH_INTVL
));
1293 flush_interval_passed
= 0;
1294 if ((lq_data
->total_failed
> lq_data
->max_failure_limit
) ||
1295 (lq_data
->total_success
> lq_data
->max_success_limit
) ||
1296 ((!lq_data
->search_better_tbl
) && (lq_data
->flush_timer
)
1297 && (flush_interval_passed
))) {
1298 IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:",
1299 lq_data
->total_failed
,
1300 lq_data
->total_success
,
1301 flush_interval_passed
);
1302 lq_data
->stay_in_tbl
= 0;
1303 lq_data
->total_failed
= 0;
1304 lq_data
->total_success
= 0;
1305 lq_data
->flush_timer
= 0;
1306 } else if (lq_data
->table_count
> 0) {
1307 lq_data
->table_count
++;
1308 if (lq_data
->table_count
>=
1309 lq_data
->table_count_limit
) {
1310 lq_data
->table_count
= 0;
1312 IWL_DEBUG_HT("LQ: stay in table clear win\n");
1313 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1314 rs_rate_scale_clear_window(
1319 if (!lq_data
->stay_in_tbl
) {
1320 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1321 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
1326 static void rs_rate_scale_perform(struct iwl_priv
*priv
,
1327 struct net_device
*dev
,
1328 struct ieee80211_hdr
*hdr
,
1329 struct sta_info
*sta
)
1331 int low
= IWL_RATE_INVALID
;
1332 int high
= IWL_RATE_INVALID
;
1335 struct iwl_rate_scale_data
*window
= NULL
;
1336 int current_tpt
= IWL_INVALID_VALUE
;
1337 int low_tpt
= IWL_INVALID_VALUE
;
1338 int high_tpt
= IWL_INVALID_VALUE
;
1340 s8 scale_action
= 0;
1343 struct iwl_rate_scale_priv
*lq_data
;
1344 struct iwl_scale_tbl_info
*tbl
, *tbl1
;
1345 u16 rate_scale_index_msk
= 0;
1346 struct iwl_rate mcs_rate
;
1352 IWL_DEBUG_RATE("rate scale calculate new rate for skb\n");
1354 fc
= le16_to_cpu(hdr
->frame_control
);
1355 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
)) {
1356 /* Send management frames and broadcast/multicast data using
1358 /* TODO: this could probably be improved.. */
1362 if (!sta
|| !sta
->rate_ctrl_priv
)
1365 if (!priv
->lq_mngr
.lq_ready
) {
1366 IWL_DEBUG_RATE("still rate scaling not ready\n");
1369 lq_data
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1371 if (!lq_data
->search_better_tbl
)
1372 active_tbl
= lq_data
->active_tbl
;
1374 active_tbl
= 1 - lq_data
->active_tbl
;
1376 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1377 is_green
= lq_data
->is_green
;
1379 index
= sta
->last_txrate
;
1381 IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index
,
1384 rs_get_supported_rates(lq_data
, hdr
, tbl
->lq_type
,
1387 IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask
);
1389 /* mask with station rate restriction */
1390 if (is_legacy(tbl
->lq_type
)) {
1391 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
1392 rate_scale_index_msk
= (u16
) (rate_mask
&
1393 (lq_data
->supp_rates
<< IWL_FIRST_OFDM_RATE
));
1395 rate_scale_index_msk
= (u16
) (rate_mask
&
1396 lq_data
->supp_rates
);
1399 rate_scale_index_msk
= rate_mask
;
1401 if (!rate_scale_index_msk
)
1402 rate_scale_index_msk
= rate_mask
;
1404 if (index
< 0 || !((1 << index
) & rate_scale_index_msk
)) {
1405 index
= IWL_INVALID_VALUE
;
1408 /* get the lowest availabe rate */
1409 for (i
= 0; i
<= IWL_RATE_COUNT
; i
++) {
1410 if ((1 << i
) & rate_scale_index_msk
)
1414 if (index
== IWL_INVALID_VALUE
) {
1415 IWL_WARNING("Can not find a suitable rate\n");
1420 if (!tbl
->expected_tpt
)
1421 rs_get_expected_tpt_table(lq_data
, tbl
);
1423 window
= &(tbl
->win
[index
]);
1425 fail_count
= window
->counter
- window
->success_counter
;
1426 if (((fail_count
< IWL_RATE_MIN_FAILURE_TH
) &&
1427 (window
->success_counter
< IWL_RATE_MIN_SUCCESS_TH
))
1428 || (tbl
->expected_tpt
== NULL
)) {
1429 IWL_DEBUG_RATE("LQ: still below TH succ %d total %d "
1431 window
->success_counter
, window
->counter
, index
);
1432 window
->average_tpt
= IWL_INVALID_VALUE
;
1433 rs_stay_in_table(lq_data
);
1435 rs_mcs_from_tbl(&mcs_rate
, tbl
, index
, is_green
);
1436 rs_fill_link_cmd(lq_data
, &mcs_rate
, &lq_data
->lq
);
1437 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1442 window
->average_tpt
= ((window
->success_ratio
*
1443 tbl
->expected_tpt
[index
] + 64) / 128);
1445 if (lq_data
->search_better_tbl
) {
1446 int success_limit
= IWL_RATE_SCALE_SWITCH
;
1448 if ((window
->success_ratio
> success_limit
) ||
1449 (window
->average_tpt
> lq_data
->last_tpt
)) {
1450 if (!is_legacy(tbl
->lq_type
)) {
1451 IWL_DEBUG_HT("LQ: we are switching to HT"
1452 " rate suc %d current tpt %d"
1454 window
->success_ratio
,
1455 window
->average_tpt
,
1457 lq_data
->enable_counter
= 1;
1459 lq_data
->active_tbl
= active_tbl
;
1460 current_tpt
= window
->average_tpt
;
1462 tbl
->lq_type
= LQ_NONE
;
1463 active_tbl
= lq_data
->active_tbl
;
1464 tbl
= &(lq_data
->lq_info
[active_tbl
]);
1466 index
= iwl_rate_index_from_plcp(
1467 tbl
->current_rate
.rate_n_flags
);
1470 current_tpt
= lq_data
->last_tpt
;
1471 IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n");
1473 lq_data
->search_better_tbl
= 0;
1478 high_low
= rs_get_adjacent_rate(index
, rate_scale_index_msk
,
1480 low
= high_low
& 0xff;
1481 high
= (high_low
>> 8) & 0xff;
1483 current_tpt
= window
->average_tpt
;
1485 if (low
!= IWL_RATE_INVALID
)
1486 low_tpt
= tbl
->win
[low
].average_tpt
;
1488 if (high
!= IWL_RATE_INVALID
)
1489 high_tpt
= tbl
->win
[high
].average_tpt
;
1494 if ((window
->success_ratio
<= IWL_RATE_DECREASE_TH
) ||
1495 (current_tpt
== 0)) {
1496 IWL_DEBUG_RATE("decrease rate because of low success_ratio\n");
1498 } else if ((low_tpt
== IWL_INVALID_VALUE
) &&
1499 (high_tpt
== IWL_INVALID_VALUE
))
1501 else if ((low_tpt
!= IWL_INVALID_VALUE
) &&
1502 (high_tpt
!= IWL_INVALID_VALUE
) &&
1503 (low_tpt
< current_tpt
) &&
1504 (high_tpt
< current_tpt
))
1507 if (high_tpt
!= IWL_INVALID_VALUE
) {
1508 if (high_tpt
> current_tpt
)
1512 ("decrease rate because of high tpt\n");
1515 } else if (low_tpt
!= IWL_INVALID_VALUE
) {
1516 if (low_tpt
> current_tpt
) {
1518 ("decrease rate because of low tpt\n");
1525 if (scale_action
== -1) {
1526 if ((low
!= IWL_RATE_INVALID
) &&
1527 ((window
->success_ratio
> IWL_RATE_HIGH_TH
) ||
1528 (current_tpt
> (100 * tbl
->expected_tpt
[low
]))))
1530 } else if ((scale_action
== 1) &&
1531 (window
->success_ratio
< IWL_RATE_INCREASE_TH
))
1534 switch (scale_action
) {
1536 if (low
!= IWL_RATE_INVALID
) {
1542 if (high
!= IWL_RATE_INVALID
) {
1553 IWL_DEBUG_HT("choose rate scale index %d action %d low %d "
1554 "high %d type %d\n",
1555 index
, scale_action
, low
, high
, tbl
->lq_type
);
1559 rs_mcs_from_tbl(&mcs_rate
, tbl
, index
, is_green
);
1560 rs_fill_link_cmd(lq_data
, &mcs_rate
, &lq_data
->lq
);
1561 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1563 rs_stay_in_table(lq_data
);
1565 if (!update_lq
&& !done_search
&& !lq_data
->stay_in_tbl
) {
1566 lq_data
->last_tpt
= current_tpt
;
1568 if (is_legacy(tbl
->lq_type
))
1569 rs_move_legacy_other(priv
, lq_data
, index
);
1570 else if (is_siso(tbl
->lq_type
))
1571 rs_move_siso_to_other(priv
, lq_data
, index
);
1573 rs_move_mimo_to_other(priv
, lq_data
, index
);
1575 if (lq_data
->search_better_tbl
) {
1576 tbl
= &(lq_data
->lq_info
[(1 - lq_data
->active_tbl
)]);
1577 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1578 rs_rate_scale_clear_window(&(tbl
->win
[i
]));
1580 index
= iwl_rate_index_from_plcp(
1581 tbl
->current_rate
.rate_n_flags
);
1583 IWL_DEBUG_HT("Switch current mcs: %X index: %d\n",
1584 tbl
->current_rate
.rate_n_flags
, index
);
1585 rs_fill_link_cmd(lq_data
, &tbl
->current_rate
,
1587 rs_send_lq_cmd(priv
, &lq_data
->lq
, CMD_ASYNC
);
1589 tbl1
= &(lq_data
->lq_info
[lq_data
->active_tbl
]);
1591 if (is_legacy(tbl1
->lq_type
) &&
1592 #ifdef CONFIG_IWLWIFI_HT
1593 !priv
->current_assoc_ht
.is_ht
&&
1595 (lq_data
->action_counter
>= 1)) {
1596 lq_data
->action_counter
= 0;
1597 IWL_DEBUG_HT("LQ: STAY in legacy table\n");
1598 rs_set_stay_in_table(1, lq_data
);
1601 if (lq_data
->enable_counter
&&
1602 (lq_data
->action_counter
>= IWL_ACTION_LIMIT
)) {
1603 #ifdef CONFIG_IWLWIFI_HT_AGG
1604 if ((lq_data
->last_tpt
> TID_AGG_TPT_THREHOLD
) &&
1605 (priv
->lq_mngr
.agg_ctrl
.auto_agg
)) {
1606 priv
->lq_mngr
.agg_ctrl
.tid_retry
=
1608 schedule_work(&priv
->agg_work
);
1610 #endif /*CONFIG_IWLWIFI_HT_AGG */
1611 lq_data
->action_counter
= 0;
1612 rs_set_stay_in_table(0, lq_data
);
1615 if ((!update_lq
) && (!done_search
) && (!lq_data
->flush_timer
))
1616 lq_data
->flush_timer
= jiffies
;
1620 rs_mcs_from_tbl(&tbl
->current_rate
, tbl
, index
, is_green
);
1622 sta
->last_txrate
= i
;
1624 /* sta->txrate is an index to A mode rates which start
1625 * at IWL_FIRST_OFDM_RATE
1627 if (lq_data
->phymode
== (u8
) MODE_IEEE80211A
)
1628 sta
->txrate
= i
- IWL_FIRST_OFDM_RATE
;
1636 static void rs_initialize_lq(struct iwl_priv
*priv
,
1637 struct sta_info
*sta
)
1640 struct iwl_rate_scale_priv
*lq
;
1641 struct iwl_scale_tbl_info
*tbl
;
1644 u8 use_green
= rs_use_green(priv
);
1645 struct iwl_rate mcs_rate
;
1647 if (!sta
|| !sta
->rate_ctrl_priv
)
1650 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1651 i
= sta
->last_txrate
;
1653 if ((lq
->lq
.sta_id
== 0xff) &&
1654 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
))
1657 if (!lq
->search_better_tbl
)
1658 active_tbl
= lq
->active_tbl
;
1660 active_tbl
= 1 - lq
->active_tbl
;
1662 tbl
= &(lq
->lq_info
[active_tbl
]);
1664 if ((i
< 0) || (i
>= IWL_RATE_COUNT
))
1667 mcs_rate
.rate_n_flags
= iwl_rates
[i
].plcp
;
1668 mcs_rate
.rate_n_flags
|= RATE_MCS_ANT_B_MSK
;
1669 mcs_rate
.rate_n_flags
&= ~RATE_MCS_ANT_A_MSK
;
1671 if (i
>= IWL_FIRST_CCK_RATE
&& i
<= IWL_LAST_CCK_RATE
)
1672 mcs_rate
.rate_n_flags
|= RATE_MCS_CCK_MSK
;
1674 tbl
->antenna_type
= ANT_AUX
;
1675 rs_get_tbl_info_from_mcs(&mcs_rate
, priv
->phymode
, tbl
, &rate_idx
);
1676 if (!rs_is_ant_connected(priv
->valid_antenna
, tbl
->antenna_type
))
1677 rs_toggle_antenna(&mcs_rate
, tbl
);
1679 rs_mcs_from_tbl(&mcs_rate
, tbl
, rate_idx
, use_green
);
1680 tbl
->current_rate
.rate_n_flags
= mcs_rate
.rate_n_flags
;
1681 rs_get_expected_tpt_table(lq
, tbl
);
1682 rs_fill_link_cmd(lq
, &mcs_rate
, &lq
->lq
);
1683 rs_send_lq_cmd(priv
, &lq
->lq
, CMD_ASYNC
);
1688 static struct ieee80211_rate
*rs_get_lowest_rate(struct ieee80211_local
1691 struct ieee80211_hw_mode
*mode
= local
->oper_hw_mode
;
1694 for (i
= 0; i
< mode
->num_rates
; i
++) {
1695 struct ieee80211_rate
*rate
= &mode
->rates
[i
];
1697 if (rate
->flags
& IEEE80211_RATE_SUPPORTED
)
1701 return &mode
->rates
[0];
1704 static struct ieee80211_rate
*rs_get_rate(void *priv_rate
,
1705 struct net_device
*dev
,
1706 struct sk_buff
*skb
,
1707 struct rate_control_extra
1712 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1713 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1714 struct sta_info
*sta
;
1716 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
1717 struct iwl_rate_scale_priv
*lq
;
1719 IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n");
1721 memset(extra
, 0, sizeof(*extra
));
1723 fc
= le16_to_cpu(hdr
->frame_control
);
1724 if (!ieee80211_is_data(fc
) || is_multicast_ether_addr(hdr
->addr1
)) {
1725 /* Send management frames and broadcast/multicast data using
1727 /* TODO: this could probably be improved.. */
1728 return rs_get_lowest_rate(local
);
1731 sta
= sta_info_get(local
, hdr
->addr1
);
1733 if (!sta
|| !sta
->rate_ctrl_priv
) {
1736 return rs_get_lowest_rate(local
);
1739 lq
= (struct iwl_rate_scale_priv
*)sta
->rate_ctrl_priv
;
1740 i
= sta
->last_txrate
;
1742 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) && !lq
->ibss_sta_added
) {
1743 u8 sta_id
= iwl_hw_find_station(priv
, hdr
->addr1
);
1744 DECLARE_MAC_BUF(mac
);
1746 if (sta_id
== IWL_INVALID_STATION
) {
1747 IWL_DEBUG_RATE("LQ: ADD station %s\n",
1748 print_mac(mac
, hdr
->addr1
));
1749 sta_id
= iwl_add_station(priv
,
1750 hdr
->addr1
, 0, CMD_ASYNC
);
1752 if ((sta_id
!= IWL_INVALID_STATION
)) {
1753 lq
->lq
.sta_id
= sta_id
;
1754 lq
->lq
.rs_table
[0].rate_n_flags
= 0;
1755 lq
->ibss_sta_added
= 1;
1756 rs_initialize_lq(priv
, sta
);
1758 if (!lq
->ibss_sta_added
)
1764 if ((i
< 0) || (i
> IWL_RATE_COUNT
))
1765 return rs_get_lowest_rate(local
);
1767 return &priv
->ieee_rates
[i
];
1770 static void *rs_alloc_sta(void *priv
, gfp_t gfp
)
1772 struct iwl_rate_scale_priv
*crl
;
1775 IWL_DEBUG_RATE("create station rate scale window\n");
1777 crl
= kzalloc(sizeof(struct iwl_rate_scale_priv
), gfp
);
1781 crl
->lq
.sta_id
= 0xff;
1784 for (j
= 0; j
< LQ_SIZE
; j
++)
1785 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1786 rs_rate_scale_clear_window(&(crl
->lq_info
[j
].win
[i
]));
1791 static void rs_rate_init(void *priv_rate
, void *priv_sta
,
1792 struct ieee80211_local
*local
,
1793 struct sta_info
*sta
)
1796 struct ieee80211_hw_mode
*mode
= local
->oper_hw_mode
;
1797 struct iwl_priv
*priv
= (struct iwl_priv
*)priv_rate
;
1798 struct iwl_rate_scale_priv
*crl
= priv_sta
;
1800 crl
->flush_timer
= 0;
1801 crl
->supp_rates
= sta
->supp_rates
;
1803 for (j
= 0; j
< LQ_SIZE
; j
++)
1804 for (i
= 0; i
< IWL_RATE_COUNT
; i
++)
1805 rs_rate_scale_clear_window(&(crl
->lq_info
[j
].win
[i
]));
1807 IWL_DEBUG_RATE("rate scale global init\n");
1808 /* TODO: what is a good starting rate for STA? About middle? Maybe not
1809 * the lowest or the highest rate.. Could consider using RSSI from
1810 * previous packets? Need to have IEEE 802.1X auth succeed immediately
1813 crl
->ibss_sta_added
= 0;
1814 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
) {
1815 u8 sta_id
= iwl_hw_find_station(priv
, sta
->addr
);
1816 DECLARE_MAC_BUF(mac
);
1818 /* for IBSS the call are from tasklet */
1819 IWL_DEBUG_HT("LQ: ADD station %s\n",
1820 print_mac(mac
, sta
->addr
));
1822 if (sta_id
== IWL_INVALID_STATION
) {
1823 IWL_DEBUG_RATE("LQ: ADD station %s\n",
1824 print_mac(mac
, sta
->addr
));
1825 sta_id
= iwl_add_station(priv
,
1826 sta
->addr
, 0, CMD_ASYNC
);
1828 if ((sta_id
!= IWL_INVALID_STATION
)) {
1829 crl
->lq
.sta_id
= sta_id
;
1830 crl
->lq
.rs_table
[0].rate_n_flags
= 0;
1832 /* FIXME: this is w/a remove it later */
1833 priv
->assoc_station_added
= 1;
1836 for (i
= 0; i
< mode
->num_rates
; i
++) {
1837 if ((sta
->supp_rates
& BIT(i
)) &&
1838 (mode
->rates
[i
].flags
& IEEE80211_RATE_SUPPORTED
))
1841 sta
->last_txrate
= sta
->txrate
;
1842 /* For MODE_IEEE80211A mode cck rate are at end
1845 if (local
->hw
.conf
.phymode
== MODE_IEEE80211A
)
1846 sta
->last_txrate
+= IWL_FIRST_OFDM_RATE
;
1848 crl
->is_dup
= priv
->is_dup
;
1849 crl
->valid_antenna
= priv
->valid_antenna
;
1850 crl
->antenna
= priv
->antenna
;
1851 crl
->is_green
= rs_use_green(priv
);
1852 crl
->active_rate
= priv
->active_rate
;
1853 crl
->active_rate
&= ~(0x1000);
1854 crl
->active_rate_basic
= priv
->active_rate_basic
;
1855 crl
->phymode
= priv
->phymode
;
1856 #ifdef CONFIG_IWLWIFI_HT
1857 crl
->active_siso_rate
= (priv
->current_assoc_ht
.supp_rates
[0] << 1);
1858 crl
->active_siso_rate
|= (priv
->current_assoc_ht
.supp_rates
[0] & 0x1);
1859 crl
->active_siso_rate
&= ~((u16
)0x2);
1860 crl
->active_siso_rate
= crl
->active_siso_rate
<< IWL_FIRST_OFDM_RATE
;
1862 crl
->active_mimo_rate
= (priv
->current_assoc_ht
.supp_rates
[1] << 1);
1863 crl
->active_mimo_rate
|= (priv
->current_assoc_ht
.supp_rates
[1] & 0x1);
1864 crl
->active_mimo_rate
&= ~((u16
)0x2);
1865 crl
->active_mimo_rate
= crl
->active_mimo_rate
<< IWL_FIRST_OFDM_RATE
;
1866 IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl
->active_siso_rate
,
1867 crl
->active_mimo_rate
);
1868 #endif /*CONFIG_IWLWIFI_HT*/
1870 if (priv
->assoc_station_added
)
1871 priv
->lq_mngr
.lq_ready
= 1;
1873 rs_initialize_lq(priv
, sta
);
1876 static int rs_fill_link_cmd(struct iwl_rate_scale_priv
*lq_data
,
1877 struct iwl_rate
*tx_mcs
,
1878 struct iwl_link_quality_cmd
*lq_cmd
)
1883 u8 ant_toggle_count
= 0;
1884 u8 use_ht_possible
= 1;
1885 u8 repeat_cur_rate
= 0;
1886 struct iwl_rate new_rate
;
1887 struct iwl_scale_tbl_info tbl_type
= { 0 };
1889 rs_get_tbl_info_from_mcs(tx_mcs
, lq_data
->phymode
,
1890 &tbl_type
, &rate_idx
);
1892 if (is_legacy(tbl_type
.lq_type
)) {
1893 ant_toggle_count
= 1;
1894 repeat_cur_rate
= IWL_NUMBER_TRY
;
1896 repeat_cur_rate
= IWL_HT_NUMBER_TRY
;
1898 lq_cmd
->general_params
.mimo_delimiter
=
1899 is_mimo(tbl_type
.lq_type
) ? 1 : 0;
1900 lq_cmd
->rs_table
[index
].rate_n_flags
=
1901 cpu_to_le32(tx_mcs
->rate_n_flags
);
1902 new_rate
.rate_n_flags
= tx_mcs
->rate_n_flags
;
1904 if (is_mimo(tbl_type
.lq_type
) || (tbl_type
.antenna_type
== ANT_MAIN
))
1905 lq_cmd
->general_params
.single_stream_ant_msk
= 1;
1907 lq_cmd
->general_params
.single_stream_ant_msk
= 2;
1912 while (index
< LINK_QUAL_MAX_RETRY_NUM
) {
1913 while (repeat_cur_rate
&& (index
< LINK_QUAL_MAX_RETRY_NUM
)) {
1914 if (is_legacy(tbl_type
.lq_type
)) {
1915 if (ant_toggle_count
<
1916 NUM_TRY_BEFORE_ANTENNA_TOGGLE
)
1919 rs_toggle_antenna(&new_rate
, &tbl_type
);
1920 ant_toggle_count
= 1;
1923 lq_cmd
->rs_table
[index
].rate_n_flags
=
1924 cpu_to_le32(new_rate
.rate_n_flags
);
1929 rs_get_tbl_info_from_mcs(&new_rate
, lq_data
->phymode
, &tbl_type
,
1932 if (is_mimo(tbl_type
.lq_type
))
1933 lq_cmd
->general_params
.mimo_delimiter
= index
;
1935 rs_get_lower_rate(lq_data
, &tbl_type
, rate_idx
,
1936 use_ht_possible
, &new_rate
);
1938 if (is_legacy(tbl_type
.lq_type
)) {
1939 if (ant_toggle_count
< NUM_TRY_BEFORE_ANTENNA_TOGGLE
)
1942 rs_toggle_antenna(&new_rate
, &tbl_type
);
1943 ant_toggle_count
= 1;
1945 repeat_cur_rate
= IWL_NUMBER_TRY
;
1947 repeat_cur_rate
= IWL_HT_NUMBER_TRY
;
1949 use_ht_possible
= 0;
1951 lq_cmd
->rs_table
[index
].rate_n_flags
=
1952 cpu_to_le32(new_rate
.rate_n_flags
);
1953 /* lq_cmd->rs_table[index].rate_n_flags = 0x800d; */
1959 /* lq_cmd->rs_table[0].rate_n_flags = 0x800d; */
1961 lq_cmd
->general_params
.dual_stream_ant_msk
= 3;
1962 lq_cmd
->agg_params
.agg_dis_start_th
= 3;
1963 lq_cmd
->agg_params
.agg_time_limit
= cpu_to_le16(4000);
1967 static void *rs_alloc(struct ieee80211_local
*local
)
1969 return local
->hw
.priv
;
1971 /* rate scale requires free function to be implemented */
1972 static void rs_free(void *priv_rate
)
1977 static void rs_clear(void *priv_rate
)
1979 struct iwl_priv
*priv
= (struct iwl_priv
*) priv_rate
;
1981 IWL_DEBUG_RATE("enter\n");
1983 priv
->lq_mngr
.lq_ready
= 0;
1984 #ifdef CONFIG_IWLWIFI_HT
1985 #ifdef CONFIG_IWLWIFI_HT_AGG
1986 if (priv
->lq_mngr
.agg_ctrl
.granted_ba
)
1987 iwl4965_turn_off_agg(priv
, TID_ALL_SPECIFIED
);
1988 #endif /*CONFIG_IWLWIFI_HT_AGG */
1989 #endif /* CONFIG_IWLWIFI_HT */
1991 IWL_DEBUG_RATE("leave\n");
1994 static void rs_free_sta(void *priv
, void *priv_sta
)
1996 struct iwl_rate_scale_priv
*rs_priv
= priv_sta
;
1998 IWL_DEBUG_RATE("enter\n");
2000 IWL_DEBUG_RATE("leave\n");
2004 #ifdef CONFIG_MAC80211_DEBUGFS
2005 static int open_file_generic(struct inode
*inode
, struct file
*file
)
2007 file
->private_data
= inode
->i_private
;
2011 static ssize_t
rs_sta_dbgfs_scale_table_read(struct file
*file
,
2012 char __user
*user_buf
, size_t count
, loff_t
*ppos
)
2018 struct iwl_rate_scale_priv
*rs_priv
= file
->private_data
;
2020 desc
+= sprintf(buff
+desc
, "sta_id %d\n", rs_priv
->lq
.sta_id
);
2021 desc
+= sprintf(buff
+desc
, "failed=%d success=%d rate=%X\n",
2022 rs_priv
->total_failed
, rs_priv
->total_success
,
2023 rs_priv
->active_rate
);
2024 desc
+= sprintf(buff
+desc
, "general:"
2025 "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
2026 rs_priv
->lq
.general_params
.flags
,
2027 rs_priv
->lq
.general_params
.mimo_delimiter
,
2028 rs_priv
->lq
.general_params
.single_stream_ant_msk
,
2029 rs_priv
->lq
.general_params
.dual_stream_ant_msk
);
2031 desc
+= sprintf(buff
+desc
, "agg:"
2032 "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
2033 le16_to_cpu(rs_priv
->lq
.agg_params
.agg_time_limit
),
2034 rs_priv
->lq
.agg_params
.agg_dis_start_th
,
2035 rs_priv
->lq
.agg_params
.agg_frame_cnt_limit
);
2037 desc
+= sprintf(buff
+desc
,
2038 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
2039 rs_priv
->lq
.general_params
.start_rate_index
[0],
2040 rs_priv
->lq
.general_params
.start_rate_index
[1],
2041 rs_priv
->lq
.general_params
.start_rate_index
[2],
2042 rs_priv
->lq
.general_params
.start_rate_index
[3]);
2045 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++)
2046 desc
+= sprintf(buff
+desc
, " rate[%d] 0x%X\n",
2047 i
, le32_to_cpu(rs_priv
->lq
.rs_table
[i
].rate_n_flags
));
2049 return simple_read_from_buffer(user_buf
, count
, ppos
, buff
, desc
);
2052 static const struct file_operations rs_sta_dbgfs_scale_table_ops
= {
2053 .read
= rs_sta_dbgfs_scale_table_read
,
2054 .open
= open_file_generic
,
2057 static void rs_add_debugfs(void *priv
, void *priv_sta
,
2060 struct iwl_rate_scale_priv
*rs_priv
= priv_sta
;
2061 rs_priv
->rs_sta_dbgfs_scale_table_file
=
2062 debugfs_create_file("rate_scale_table", 0444, dir
,
2063 rs_priv
, &rs_sta_dbgfs_scale_table_ops
);
2066 static void rs_remove_debugfs(void *priv
, void *priv_sta
)
2068 struct iwl_rate_scale_priv
*rs_priv
= priv_sta
;
2069 debugfs_remove(rs_priv
->rs_sta_dbgfs_scale_table_file
);
2073 static struct rate_control_ops rs_ops
= {
2076 .tx_status
= rs_tx_status
,
2077 .get_rate
= rs_get_rate
,
2078 .rate_init
= rs_rate_init
,
2082 .alloc_sta
= rs_alloc_sta
,
2083 .free_sta
= rs_free_sta
,
2084 #ifdef CONFIG_MAC80211_DEBUGFS
2085 .add_sta_debugfs
= rs_add_debugfs
,
2086 .remove_sta_debugfs
= rs_remove_debugfs
,
2090 int iwl_fill_rs_info(struct ieee80211_hw
*hw
, char *buf
, u8 sta_id
)
2092 struct ieee80211_local
*local
= hw_to_local(hw
);
2093 struct iwl_priv
*priv
= hw
->priv
;
2094 struct iwl_rate_scale_priv
*rs_priv
;
2095 struct sta_info
*sta
;
2097 u32 samples
= 0, success
= 0, good
= 0;
2098 unsigned long now
= jiffies
;
2100 u8 lq_type
, antenna
;
2102 sta
= sta_info_get(local
, priv
->stations
[sta_id
].sta
.sta
.addr
);
2103 if (!sta
|| !sta
->rate_ctrl_priv
) {
2106 IWL_DEBUG_RATE("leave - no private rate data!\n");
2108 IWL_DEBUG_RATE("leave - no station!\n");
2109 return sprintf(buf
, "station %d not found\n", sta_id
);
2112 rs_priv
= (void *)sta
->rate_ctrl_priv
;
2114 lq_type
= rs_priv
->lq_info
[rs_priv
->active_tbl
].lq_type
;
2115 antenna
= rs_priv
->lq_info
[rs_priv
->active_tbl
].antenna_type
;
2117 if (is_legacy(lq_type
))
2118 i
= IWL_RATE_54M_INDEX
;
2120 i
= IWL_RATE_60M_INDEX
;
2124 int active
= rs_priv
->active_tbl
;
2127 sprintf(&buf
[count
], " %2dMbs: ", iwl_rates
[i
].ieee
/ 2);
2129 mask
= (1ULL << (IWL_RATE_MAX_WINDOW
- 1));
2130 for (j
= 0; j
< IWL_RATE_MAX_WINDOW
; j
++, mask
>>= 1)
2132 (rs_priv
->lq_info
[active
].win
[i
].data
& mask
)
2135 samples
+= rs_priv
->lq_info
[active
].win
[i
].counter
;
2136 good
+= rs_priv
->lq_info
[active
].win
[i
].success_counter
;
2137 success
+= rs_priv
->lq_info
[active
].win
[i
].success_counter
*
2140 if (rs_priv
->lq_info
[active
].win
[i
].stamp
) {
2142 jiffies_to_msecs(now
-
2143 rs_priv
->lq_info
[active
].win
[i
].stamp
);
2145 if (delta
> max_time
)
2148 count
+= sprintf(&buf
[count
], "%5dms\n", delta
);
2150 buf
[count
++] = '\n';
2152 j
= iwl_get_prev_ieee_rate(i
);
2158 /* Display the average rate of all samples taken.
2160 * NOTE: We multiple # of samples by 2 since the IEEE measurement
2161 * added from iwl_rates is actually 2X the rate */
2163 count
+= sprintf(&buf
[count
],
2164 "\nAverage rate is %3d.%02dMbs over last %4dms\n"
2165 "%3d%% success (%d good packets over %d tries)\n",
2166 success
/ (2 * samples
), (success
* 5 / samples
) % 10,
2167 max_time
, good
* 100 / samples
, good
, samples
);
2169 count
+= sprintf(&buf
[count
], "\nAverage rate: 0Mbs\n");
2170 count
+= sprintf(&buf
[count
], "\nrate scale type %d anntena %d "
2171 "active_search %d rate index %d\n", lq_type
, antenna
,
2172 rs_priv
->search_better_tbl
, sta
->last_txrate
);
2178 void iwl_rate_scale_init(struct ieee80211_hw
*hw
, s32 sta_id
)
2180 struct iwl_priv
*priv
= hw
->priv
;
2182 priv
->lq_mngr
.lq_ready
= 1;
2185 void iwl_rate_control_register(struct ieee80211_hw
*hw
)
2187 ieee80211_rate_control_register(&rs_ops
);
2190 void iwl_rate_control_unregister(struct ieee80211_hw
*hw
)
2192 ieee80211_rate_control_unregister(&rs_ops
);