Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2005 - 2007 Intel Corporation. All rights reserved. |
| 4 | * |
| 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. |
| 8 | * |
| 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 |
| 12 | * more details. |
| 13 | * |
| 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 |
| 17 | * |
| 18 | * The full GNU General Public License is included in this distribution in the |
| 19 | * file called LICENSE. |
| 20 | * |
| 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 |
| 24 | * |
| 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> |
| 32 | |
| 33 | #include <linux/netdevice.h> |
| 34 | #include <linux/etherdevice.h> |
| 35 | #include <linux/delay.h> |
| 36 | |
| 37 | #include <linux/workqueue.h> |
| 38 | |
| 39 | #include <net/mac80211.h> |
| 40 | #include <linux/wireless.h> |
| 41 | |
Zhu Yi | 1156b2c | 2007-09-25 19:34:09 -0700 | [diff] [blame] | 42 | #define IWL 4965 |
| 43 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 44 | #include "../net/mac80211/ieee80211_rate.h" |
| 45 | |
| 46 | #include "iwlwifi.h" |
| 47 | #include "iwl-helpers.h" |
| 48 | |
| 49 | #define RS_NAME "iwl-4965-rs" |
| 50 | |
| 51 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 |
| 52 | #define IWL_NUMBER_TRY 1 |
| 53 | #define IWL_HT_NUMBER_TRY 3 |
| 54 | |
| 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 */ |
| 62 | |
| 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, |
| 66 | 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 |
| 71 | }; |
| 72 | |
| 73 | struct iwl_rate { |
| 74 | u32 rate_n_flags; |
| 75 | } __attribute__ ((packed)); |
| 76 | |
| 77 | struct iwl_rate_scale_data { |
| 78 | u64 data; |
| 79 | s32 success_counter; |
| 80 | s32 success_ratio; |
| 81 | s32 counter; |
| 82 | s32 average_tpt; |
| 83 | unsigned long stamp; |
| 84 | }; |
| 85 | |
| 86 | struct iwl_scale_tbl_info { |
| 87 | enum iwl_table_type lq_type; |
| 88 | enum iwl_antenna_type antenna_type; |
| 89 | u8 is_SGI; |
| 90 | u8 is_fat; |
| 91 | u8 is_dup; |
| 92 | u8 action; |
| 93 | s32 *expected_tpt; |
| 94 | struct iwl_rate current_rate; |
| 95 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; |
| 96 | }; |
| 97 | |
| 98 | struct iwl_rate_scale_priv { |
| 99 | u8 active_tbl; |
| 100 | u8 enable_counter; |
| 101 | u8 stay_in_tbl; |
| 102 | u8 search_better_tbl; |
| 103 | s32 last_tpt; |
| 104 | u32 table_count_limit; |
| 105 | u32 max_failure_limit; |
| 106 | u32 max_success_limit; |
| 107 | u32 table_count; |
| 108 | u32 total_failed; |
| 109 | u32 total_success; |
| 110 | u32 flush_timer; |
| 111 | u8 action_counter; |
| 112 | u8 antenna; |
| 113 | u8 valid_antenna; |
| 114 | u8 is_green; |
| 115 | u8 is_dup; |
| 116 | u8 phymode; |
| 117 | u8 ibss_sta_added; |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 118 | u32 supp_rates; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 119 | u16 active_rate; |
| 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]; |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 125 | #ifdef CONFIG_MAC80211_DEBUGFS |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 126 | struct dentry *rs_sta_dbgfs_scale_table_file; |
| 127 | struct iwl_rate dbg_fixed; |
| 128 | struct iwl_priv *drv; |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 129 | #endif |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 130 | }; |
| 131 | |
| 132 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
| 133 | struct net_device *dev, |
| 134 | struct ieee80211_hdr *hdr, |
| 135 | struct sta_info *sta); |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 136 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 137 | struct iwl_rate *tx_mcs, |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 138 | struct iwl_link_quality_cmd *tbl); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 139 | |
| 140 | |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 141 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 142 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
| 143 | struct iwl_rate *mcs, int index); |
| 144 | #else |
| 145 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
| 146 | struct iwl_rate *mcs, int index) |
| 147 | {} |
| 148 | #endif |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 149 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
| 150 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 |
| 151 | }; |
| 152 | |
| 153 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { |
| 154 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 |
| 155 | }; |
| 156 | |
| 157 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { |
| 158 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 |
| 159 | }; |
| 160 | |
| 161 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { |
| 162 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 |
| 163 | }; |
| 164 | |
| 165 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { |
| 166 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 |
| 167 | }; |
| 168 | |
| 169 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { |
| 170 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 |
| 171 | }; |
| 172 | |
| 173 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { |
| 174 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 |
| 175 | }; |
| 176 | |
| 177 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { |
| 178 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 |
| 179 | }; |
| 180 | |
| 181 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { |
| 182 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 |
| 183 | }; |
| 184 | |
| 185 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { |
| 186 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 |
| 187 | }; |
| 188 | |
| 189 | static int iwl_lq_sync_callback(struct iwl_priv *priv, |
| 190 | struct iwl_cmd *cmd, struct sk_buff *skb) |
| 191 | { |
| 192 | /*We didn't cache the SKB; let the caller free it */ |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | static inline u8 iwl_rate_get_rate(u32 rate_n_flags) |
| 197 | { |
| 198 | return (u8)(rate_n_flags & 0xFF); |
| 199 | } |
| 200 | |
| 201 | static int rs_send_lq_cmd(struct iwl_priv *priv, |
| 202 | struct iwl_link_quality_cmd *lq, u8 flags) |
| 203 | { |
| 204 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 205 | int i; |
| 206 | #endif |
| 207 | int rc = -1; |
| 208 | |
| 209 | struct iwl_host_cmd cmd = { |
| 210 | .id = REPLY_TX_LINK_QUALITY_CMD, |
| 211 | .len = sizeof(struct iwl_link_quality_cmd), |
| 212 | .meta.flags = flags, |
| 213 | .data = lq, |
| 214 | }; |
| 215 | |
| 216 | if ((lq->sta_id == 0xFF) && |
| 217 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
| 218 | return rc; |
| 219 | |
| 220 | if (lq->sta_id == 0xFF) |
| 221 | lq->sta_id = IWL_AP_ID; |
| 222 | |
| 223 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); |
| 224 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", |
| 225 | lq->general_params.single_stream_ant_msk, |
| 226 | lq->general_params.dual_stream_ant_msk); |
| 227 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 228 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
| 229 | IWL_DEBUG_RATE("lq index %d 0x%X\n", |
| 230 | i, lq->rs_table[i].rate_n_flags); |
| 231 | #endif |
| 232 | |
| 233 | if (flags & CMD_ASYNC) |
| 234 | cmd.meta.u.callback = iwl_lq_sync_callback; |
| 235 | |
| 236 | if (iwl_is_associated(priv) && priv->assoc_station_added && |
| 237 | priv->lq_mngr.lq_ready) |
| 238 | rc = iwl_send_cmd(priv, &cmd); |
| 239 | |
| 240 | return rc; |
| 241 | } |
| 242 | |
| 243 | static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
| 244 | { |
| 245 | window->data = 0; |
| 246 | window->success_counter = 0; |
| 247 | window->success_ratio = IWL_INVALID_VALUE; |
| 248 | window->counter = 0; |
| 249 | window->average_tpt = IWL_INVALID_VALUE; |
| 250 | window->stamp = 0; |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
| 256 | int scale_index, s32 tpt, u32 status) |
| 257 | { |
| 258 | int rc = 0; |
| 259 | struct iwl_rate_scale_data *window = NULL; |
| 260 | u64 mask; |
| 261 | u8 win_size = IWL_RATE_MAX_WINDOW; |
| 262 | s32 fail_count; |
| 263 | |
| 264 | if (scale_index < 0) |
| 265 | return -1; |
| 266 | |
| 267 | if (scale_index >= IWL_RATE_COUNT) |
| 268 | return -1; |
| 269 | |
| 270 | window = &(windows[scale_index]); |
| 271 | |
| 272 | if (window->counter >= win_size) { |
| 273 | |
| 274 | window->counter = win_size - 1; |
| 275 | mask = 1; |
| 276 | mask = (mask << (win_size - 1)); |
| 277 | if ((window->data & mask)) { |
| 278 | window->data &= ~mask; |
| 279 | window->success_counter = window->success_counter - 1; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | window->counter = window->counter + 1; |
| 284 | mask = window->data; |
| 285 | window->data = (mask << 1); |
| 286 | if (status != 0) { |
| 287 | window->success_counter = window->success_counter + 1; |
| 288 | window->data |= 0x1; |
| 289 | } |
| 290 | |
| 291 | if (window->counter > 0) |
| 292 | window->success_ratio = 128 * (100 * window->success_counter) |
| 293 | / window->counter; |
| 294 | else |
| 295 | window->success_ratio = IWL_INVALID_VALUE; |
| 296 | |
| 297 | fail_count = window->counter - window->success_counter; |
| 298 | |
| 299 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
| 300 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) |
| 301 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
| 302 | else |
| 303 | window->average_tpt = IWL_INVALID_VALUE; |
| 304 | |
| 305 | window->stamp = jiffies; |
| 306 | |
| 307 | return rc; |
| 308 | } |
| 309 | |
| 310 | int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, |
| 311 | struct iwl_scale_tbl_info *tbl, |
| 312 | int index, u8 use_green) |
| 313 | { |
| 314 | int rc = 0; |
| 315 | |
| 316 | if (is_legacy(tbl->lq_type)) { |
| 317 | mcs_rate->rate_n_flags = iwl_rates[index].plcp; |
| 318 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
| 319 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; |
| 320 | |
| 321 | } else if (is_siso(tbl->lq_type)) { |
| 322 | if (index > IWL_LAST_OFDM_RATE) |
| 323 | index = IWL_LAST_OFDM_RATE; |
| 324 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | |
| 325 | RATE_MCS_HT_MSK; |
| 326 | } else { |
| 327 | if (index > IWL_LAST_OFDM_RATE) |
| 328 | index = IWL_LAST_OFDM_RATE; |
| 329 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | |
| 330 | RATE_MCS_HT_MSK; |
| 331 | } |
| 332 | |
| 333 | switch (tbl->antenna_type) { |
| 334 | case ANT_BOTH: |
| 335 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; |
| 336 | break; |
| 337 | case ANT_MAIN: |
| 338 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; |
| 339 | break; |
| 340 | case ANT_AUX: |
| 341 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| 342 | break; |
| 343 | case ANT_NONE: |
| 344 | break; |
| 345 | } |
| 346 | |
| 347 | if (is_legacy(tbl->lq_type)) |
| 348 | return rc; |
| 349 | |
| 350 | if (tbl->is_fat) { |
| 351 | if (tbl->is_dup) |
| 352 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; |
| 353 | else |
| 354 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; |
| 355 | } |
| 356 | if (tbl->is_SGI) |
| 357 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; |
| 358 | |
| 359 | if (use_green) { |
| 360 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; |
| 361 | if (is_siso(tbl->lq_type)) |
| 362 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; |
| 363 | } |
| 364 | return rc; |
| 365 | } |
| 366 | |
| 367 | static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, |
| 368 | int phymode, struct iwl_scale_tbl_info *tbl, |
| 369 | int *rate_idx) |
| 370 | { |
| 371 | int index; |
| 372 | u32 ant_msk; |
| 373 | |
| 374 | index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); |
| 375 | |
| 376 | if (index == IWL_RATE_INVALID) { |
| 377 | *rate_idx = -1; |
| 378 | return -1; |
| 379 | } |
| 380 | tbl->is_SGI = 0; |
| 381 | tbl->is_fat = 0; |
| 382 | tbl->is_dup = 0; |
| 383 | tbl->antenna_type = ANT_BOTH; |
| 384 | |
| 385 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { |
| 386 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); |
| 387 | |
| 388 | if (ant_msk == RATE_MCS_ANT_AB_MSK) |
| 389 | tbl->lq_type = LQ_NONE; |
| 390 | else { |
| 391 | |
| 392 | if (phymode == MODE_IEEE80211A) |
| 393 | tbl->lq_type = LQ_A; |
| 394 | else |
| 395 | tbl->lq_type = LQ_G; |
| 396 | |
| 397 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) |
| 398 | tbl->antenna_type = ANT_MAIN; |
| 399 | else |
| 400 | tbl->antenna_type = ANT_AUX; |
| 401 | } |
| 402 | *rate_idx = index; |
| 403 | |
| 404 | } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) |
| 405 | <= IWL_RATE_SISO_60M_PLCP) { |
| 406 | tbl->lq_type = LQ_SISO; |
| 407 | |
| 408 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); |
| 409 | if (ant_msk == RATE_MCS_ANT_AB_MSK) |
| 410 | tbl->lq_type = LQ_NONE; |
| 411 | else { |
| 412 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) |
| 413 | tbl->antenna_type = ANT_MAIN; |
| 414 | else |
| 415 | tbl->antenna_type = ANT_AUX; |
| 416 | } |
| 417 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) |
| 418 | tbl->is_SGI = 1; |
| 419 | |
| 420 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || |
| 421 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) |
| 422 | tbl->is_fat = 1; |
| 423 | |
| 424 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) |
| 425 | tbl->is_dup = 1; |
| 426 | |
| 427 | *rate_idx = index; |
| 428 | } else { |
| 429 | tbl->lq_type = LQ_MIMO; |
| 430 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) |
| 431 | tbl->is_SGI = 1; |
| 432 | |
| 433 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || |
| 434 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) |
| 435 | tbl->is_fat = 1; |
| 436 | |
| 437 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) |
| 438 | tbl->is_dup = 1; |
| 439 | *rate_idx = index; |
| 440 | } |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | static inline void rs_toggle_antenna(struct iwl_rate *new_rate, |
| 445 | struct iwl_scale_tbl_info *tbl) |
| 446 | { |
| 447 | if (tbl->antenna_type == ANT_AUX) { |
| 448 | tbl->antenna_type = ANT_MAIN; |
| 449 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; |
| 450 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; |
| 451 | } else { |
| 452 | tbl->antenna_type = ANT_AUX; |
| 453 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; |
| 454 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | static inline s8 rs_use_green(struct iwl_priv *priv) |
| 459 | { |
| 460 | s8 rc = 0; |
| 461 | #ifdef CONFIG_IWLWIFI_HT |
| 462 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| 463 | return 0; |
| 464 | |
| 465 | if ((priv->current_assoc_ht.is_green_field) && |
| 466 | !(priv->current_assoc_ht.operating_mode & 0x4)) |
| 467 | rc = 1; |
| 468 | #endif /*CONFIG_IWLWIFI_HT */ |
| 469 | return rc; |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * rs_get_supported_rates - get the available rates |
| 474 | * |
| 475 | * if management frame or broadcast frame only return |
| 476 | * basic available rates. |
| 477 | * |
| 478 | */ |
| 479 | static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, |
| 480 | struct ieee80211_hdr *hdr, |
| 481 | enum iwl_table_type rate_type, |
| 482 | u16 *data_rate) |
| 483 | { |
| 484 | if (is_legacy(rate_type)) |
| 485 | *data_rate = lq_data->active_rate; |
| 486 | else { |
| 487 | if (is_siso(rate_type)) |
| 488 | *data_rate = lq_data->active_siso_rate; |
| 489 | else |
| 490 | *data_rate = lq_data->active_mimo_rate; |
| 491 | } |
| 492 | |
| 493 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
| 494 | lq_data->active_rate_basic) |
| 495 | *data_rate = lq_data->active_rate_basic; |
| 496 | } |
| 497 | |
| 498 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) |
| 499 | { |
| 500 | u8 high = IWL_RATE_INVALID; |
| 501 | u8 low = IWL_RATE_INVALID; |
| 502 | |
| 503 | /* 802.11A or ht walks to the next literal adjascent rate in |
| 504 | * the rate table */ |
| 505 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { |
| 506 | int i; |
| 507 | u32 mask; |
| 508 | |
| 509 | /* Find the previous rate that is in the rate mask */ |
| 510 | i = index - 1; |
| 511 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { |
| 512 | if (rate_mask & mask) { |
| 513 | low = i; |
| 514 | break; |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | /* Find the next rate that is in the rate mask */ |
| 519 | i = index + 1; |
| 520 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { |
| 521 | if (rate_mask & mask) { |
| 522 | high = i; |
| 523 | break; |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | return (high << 8) | low; |
| 528 | } |
| 529 | |
| 530 | low = index; |
| 531 | while (low != IWL_RATE_INVALID) { |
| 532 | low = iwl_rates[low].prev_rs; |
| 533 | if (low == IWL_RATE_INVALID) |
| 534 | break; |
| 535 | if (rate_mask & (1 << low)) |
| 536 | break; |
| 537 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); |
| 538 | } |
| 539 | |
| 540 | high = index; |
| 541 | while (high != IWL_RATE_INVALID) { |
| 542 | high = iwl_rates[high].next_rs; |
| 543 | if (high == IWL_RATE_INVALID) |
| 544 | break; |
| 545 | if (rate_mask & (1 << high)) |
| 546 | break; |
| 547 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); |
| 548 | } |
| 549 | |
| 550 | return (high << 8) | low; |
| 551 | } |
| 552 | |
| 553 | static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, |
| 554 | struct iwl_scale_tbl_info *tbl, u8 scale_index, |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 555 | u8 ht_possible, struct iwl_rate *mcs_rate) |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 556 | { |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 557 | s32 low; |
| 558 | u16 rate_mask; |
| 559 | u16 high_low; |
| 560 | u8 switch_to_legacy = 0; |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 561 | u8 is_green = lq_data->is_green; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 562 | |
| 563 | /* check if we need to switch from HT to legacy rates. |
| 564 | * assumption is that mandatory rates (1Mbps or 6Mbps) |
| 565 | * are always supported (spec demand) */ |
| 566 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { |
| 567 | switch_to_legacy = 1; |
| 568 | scale_index = rs_ht_to_legacy[scale_index]; |
| 569 | if (lq_data->phymode == MODE_IEEE80211A) |
| 570 | tbl->lq_type = LQ_A; |
| 571 | else |
| 572 | tbl->lq_type = LQ_G; |
| 573 | |
| 574 | if ((tbl->antenna_type == ANT_BOTH) || |
| 575 | (tbl->antenna_type == ANT_NONE)) |
| 576 | tbl->antenna_type = ANT_MAIN; |
| 577 | |
| 578 | tbl->is_fat = 0; |
| 579 | tbl->is_SGI = 0; |
| 580 | } |
| 581 | |
| 582 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); |
| 583 | |
| 584 | /* mask with station rate restriction */ |
| 585 | if (is_legacy(tbl->lq_type)) { |
| 586 | if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| 587 | rate_mask = (u16)(rate_mask & |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 588 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 589 | else |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 590 | rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 591 | } |
| 592 | |
| 593 | /* if we did switched from HT to legacy check current rate */ |
| 594 | if ((switch_to_legacy) && |
| 595 | (rate_mask & (1 << scale_index))) { |
| 596 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); |
| 601 | low = high_low & 0xff; |
| 602 | |
| 603 | if (low != IWL_RATE_INVALID) |
| 604 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); |
| 605 | else |
| 606 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
| 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | static void rs_tx_status(void *priv_rate, |
| 612 | struct net_device *dev, |
| 613 | struct sk_buff *skb, |
| 614 | struct ieee80211_tx_status *tx_resp) |
| 615 | { |
| 616 | int status; |
| 617 | u8 retries; |
| 618 | int rs_index, index = 0; |
| 619 | struct iwl_rate_scale_priv *lq; |
| 620 | struct iwl_link_quality_cmd *table; |
| 621 | struct sta_info *sta; |
| 622 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 623 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| 624 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 625 | struct iwl_rate_scale_data *window = NULL; |
| 626 | struct iwl_rate_scale_data *search_win = NULL; |
| 627 | struct iwl_rate tx_mcs; |
| 628 | struct iwl_scale_tbl_info tbl_type; |
| 629 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; |
| 630 | u8 active_index = 0; |
| 631 | u16 fc = le16_to_cpu(hdr->frame_control); |
| 632 | s32 tpt = 0; |
| 633 | |
Zhu Yi | 5882635 | 2007-09-27 11:27:39 +0800 | [diff] [blame] | 634 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 635 | |
| 636 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) |
| 637 | return; |
| 638 | |
| 639 | retries = tx_resp->retry_count; |
| 640 | |
| 641 | if (retries > 15) |
| 642 | retries = 15; |
| 643 | |
| 644 | |
| 645 | sta = sta_info_get(local, hdr->addr1); |
| 646 | |
| 647 | if (!sta || !sta->rate_ctrl_priv) { |
| 648 | if (sta) |
| 649 | sta_info_put(sta); |
| 650 | return; |
| 651 | } |
| 652 | |
| 653 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| 654 | |
| 655 | if (!priv->lq_mngr.lq_ready) |
| 656 | return; |
| 657 | |
| 658 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) |
| 659 | return; |
| 660 | |
| 661 | table = &lq->lq; |
| 662 | active_index = lq->active_tbl; |
| 663 | |
| 664 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); |
| 665 | if (!lq->antenna) |
| 666 | lq->antenna = lq->valid_antenna; |
| 667 | |
| 668 | lq->antenna = lq->valid_antenna; |
| 669 | curr_tbl = &(lq->lq_info[active_index]); |
| 670 | search_tbl = &(lq->lq_info[(1 - active_index)]); |
| 671 | window = (struct iwl_rate_scale_data *) |
| 672 | &(curr_tbl->win[0]); |
| 673 | search_win = (struct iwl_rate_scale_data *) |
| 674 | &(search_tbl->win[0]); |
| 675 | |
| 676 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; |
| 677 | |
| 678 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| 679 | &tbl_type, &rs_index); |
| 680 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { |
| 681 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", |
| 682 | rs_index, tx_mcs.rate_n_flags); |
| 683 | sta_info_put(sta); |
| 684 | return; |
| 685 | } |
| 686 | |
| 687 | if (retries && |
| 688 | (tx_mcs.rate_n_flags != |
| 689 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { |
| 690 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", |
| 691 | tx_mcs.rate_n_flags, |
| 692 | le32_to_cpu(table->rs_table[0].rate_n_flags)); |
| 693 | sta_info_put(sta); |
| 694 | return; |
| 695 | } |
| 696 | |
| 697 | while (retries) { |
| 698 | tx_mcs.rate_n_flags = |
| 699 | le32_to_cpu(table->rs_table[index].rate_n_flags); |
| 700 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| 701 | &tbl_type, &rs_index); |
| 702 | |
| 703 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
| 704 | (tbl_type.antenna_type == search_tbl->antenna_type) && |
| 705 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
| 706 | if (search_tbl->expected_tpt) |
| 707 | tpt = search_tbl->expected_tpt[rs_index]; |
| 708 | else |
| 709 | tpt = 0; |
| 710 | rs_collect_tx_data(search_win, |
| 711 | rs_index, tpt, 0); |
| 712 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
| 713 | (tbl_type.antenna_type == curr_tbl->antenna_type) && |
| 714 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
| 715 | if (curr_tbl->expected_tpt) |
| 716 | tpt = curr_tbl->expected_tpt[rs_index]; |
| 717 | else |
| 718 | tpt = 0; |
| 719 | rs_collect_tx_data(window, rs_index, tpt, 0); |
| 720 | } |
| 721 | if (lq->stay_in_tbl) |
| 722 | lq->total_failed++; |
| 723 | --retries; |
| 724 | index++; |
| 725 | |
| 726 | } |
| 727 | |
| 728 | if (!tx_resp->retry_count) |
| 729 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; |
| 730 | else |
| 731 | tx_mcs.rate_n_flags = |
| 732 | le32_to_cpu(table->rs_table[index].rate_n_flags); |
| 733 | |
| 734 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| 735 | &tbl_type, &rs_index); |
| 736 | |
| 737 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) |
| 738 | status = 1; |
| 739 | else |
| 740 | status = 0; |
| 741 | |
| 742 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
| 743 | (tbl_type.antenna_type == search_tbl->antenna_type) && |
| 744 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
| 745 | if (search_tbl->expected_tpt) |
| 746 | tpt = search_tbl->expected_tpt[rs_index]; |
| 747 | else |
| 748 | tpt = 0; |
| 749 | rs_collect_tx_data(search_win, |
| 750 | rs_index, tpt, status); |
| 751 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
| 752 | (tbl_type.antenna_type == curr_tbl->antenna_type) && |
| 753 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
| 754 | if (curr_tbl->expected_tpt) |
| 755 | tpt = curr_tbl->expected_tpt[rs_index]; |
| 756 | else |
| 757 | tpt = 0; |
| 758 | rs_collect_tx_data(window, rs_index, tpt, status); |
| 759 | } |
| 760 | |
| 761 | if (lq->stay_in_tbl) { |
| 762 | if (status) |
| 763 | lq->total_success++; |
| 764 | else |
| 765 | lq->total_failed++; |
| 766 | } |
| 767 | |
| 768 | rs_rate_scale_perform(priv, dev, hdr, sta); |
| 769 | sta_info_put(sta); |
| 770 | return; |
| 771 | } |
| 772 | |
| 773 | static u8 rs_is_ant_connected(u8 valid_antenna, |
| 774 | enum iwl_antenna_type antenna_type) |
| 775 | { |
| 776 | if (antenna_type == ANT_AUX) |
| 777 | return ((valid_antenna & 0x2) ? 1:0); |
| 778 | else if (antenna_type == ANT_MAIN) |
| 779 | return ((valid_antenna & 0x1) ? 1:0); |
| 780 | else if (antenna_type == ANT_BOTH) { |
| 781 | if ((valid_antenna & 0x3) == 0x3) |
| 782 | return 1; |
| 783 | else |
| 784 | return 0; |
| 785 | } |
| 786 | |
| 787 | return 1; |
| 788 | } |
| 789 | |
| 790 | static u8 rs_is_other_ant_connected(u8 valid_antenna, |
| 791 | enum iwl_antenna_type antenna_type) |
| 792 | { |
| 793 | if (antenna_type == ANT_AUX) |
| 794 | return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); |
| 795 | else |
| 796 | return (rs_is_ant_connected(valid_antenna, ANT_AUX)); |
| 797 | |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | static void rs_set_stay_in_table(u8 is_legacy, |
| 802 | struct iwl_rate_scale_priv *lq_data) |
| 803 | { |
| 804 | IWL_DEBUG_HT("we are staying in the same table\n"); |
| 805 | lq_data->stay_in_tbl = 1; |
| 806 | if (is_legacy) { |
| 807 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
| 808 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; |
| 809 | lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; |
| 810 | } else { |
| 811 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
| 812 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; |
| 813 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; |
| 814 | } |
| 815 | lq_data->table_count = 0; |
| 816 | lq_data->total_failed = 0; |
| 817 | lq_data->total_success = 0; |
| 818 | } |
| 819 | |
| 820 | static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, |
| 821 | struct iwl_scale_tbl_info *tbl) |
| 822 | { |
| 823 | if (is_legacy(tbl->lq_type)) { |
| 824 | if (!is_a_band(tbl->lq_type)) |
| 825 | tbl->expected_tpt = expected_tpt_G; |
| 826 | else |
| 827 | tbl->expected_tpt = expected_tpt_A; |
| 828 | } else if (is_siso(tbl->lq_type)) { |
| 829 | if (tbl->is_fat && !lq_data->is_dup) |
| 830 | if (tbl->is_SGI) |
| 831 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; |
| 832 | else |
| 833 | tbl->expected_tpt = expected_tpt_siso40MHz; |
| 834 | else if (tbl->is_SGI) |
| 835 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; |
| 836 | else |
| 837 | tbl->expected_tpt = expected_tpt_siso20MHz; |
| 838 | |
| 839 | } else if (is_mimo(tbl->lq_type)) { |
| 840 | if (tbl->is_fat && !lq_data->is_dup) |
| 841 | if (tbl->is_SGI) |
| 842 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; |
| 843 | else |
| 844 | tbl->expected_tpt = expected_tpt_mimo40MHz; |
| 845 | else if (tbl->is_SGI) |
| 846 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; |
| 847 | else |
| 848 | tbl->expected_tpt = expected_tpt_mimo20MHz; |
| 849 | } else |
| 850 | tbl->expected_tpt = expected_tpt_G; |
| 851 | } |
| 852 | |
| 853 | #ifdef CONFIG_IWLWIFI_HT |
| 854 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
| 855 | struct iwl_rate_scale_priv *lq_data, |
| 856 | struct iwl_scale_tbl_info *tbl, |
| 857 | u16 rate_mask, s8 index, s8 rate) |
| 858 | { |
| 859 | struct iwl_scale_tbl_info *active_tbl = |
| 860 | &(lq_data->lq_info[lq_data->active_tbl]); |
| 861 | s32 new_rate, high, low, start_hi; |
| 862 | s32 active_sr = active_tbl->win[index].success_ratio; |
| 863 | s32 *tpt_tbl = tbl->expected_tpt; |
| 864 | s32 active_tpt = active_tbl->expected_tpt[index]; |
| 865 | u16 high_low; |
| 866 | |
| 867 | new_rate = high = low = start_hi = IWL_RATE_INVALID; |
| 868 | |
| 869 | for (; ;) { |
| 870 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); |
| 871 | |
| 872 | low = high_low & 0xff; |
| 873 | high = (high_low >> 8) & 0xff; |
| 874 | |
| 875 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && |
| 876 | ((active_sr > IWL_RATE_DECREASE_TH) && |
| 877 | (active_sr <= IWL_RATE_HIGH_TH) && |
| 878 | (tpt_tbl[rate] <= active_tpt))) || |
| 879 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && |
| 880 | (tpt_tbl[rate] > active_tpt))) { |
| 881 | |
| 882 | if (start_hi != IWL_RATE_INVALID) { |
| 883 | new_rate = start_hi; |
| 884 | break; |
| 885 | } |
| 886 | new_rate = rate; |
| 887 | if (low != IWL_RATE_INVALID) |
| 888 | rate = low; |
| 889 | else |
| 890 | break; |
| 891 | } else { |
| 892 | if (new_rate != IWL_RATE_INVALID) |
| 893 | break; |
| 894 | else if (high != IWL_RATE_INVALID) { |
| 895 | start_hi = high; |
| 896 | rate = high; |
| 897 | } else { |
| 898 | new_rate = rate; |
| 899 | break; |
| 900 | } |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | return new_rate; |
| 905 | } |
| 906 | #endif /* CONFIG_IWLWIFI_HT */ |
| 907 | |
| 908 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) |
| 909 | { |
| 910 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); |
| 911 | } |
| 912 | |
| 913 | static int rs_switch_to_mimo(struct iwl_priv *priv, |
| 914 | struct iwl_rate_scale_priv *lq_data, |
| 915 | struct iwl_scale_tbl_info *tbl, int index) |
| 916 | { |
| 917 | int rc = -1; |
| 918 | #ifdef CONFIG_IWLWIFI_HT |
| 919 | u16 rate_mask; |
| 920 | s32 rate; |
| 921 | s8 is_green = lq_data->is_green; |
| 922 | |
| 923 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| 924 | return -1; |
| 925 | |
| 926 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); |
| 927 | tbl->lq_type = LQ_MIMO; |
| 928 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, |
| 929 | &rate_mask); |
| 930 | |
| 931 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
| 932 | return -1; |
| 933 | |
| 934 | if (!rs_is_both_ant_supp(lq_data->antenna)) |
| 935 | return -1; |
| 936 | |
| 937 | rc = 0; |
| 938 | tbl->is_dup = lq_data->is_dup; |
| 939 | tbl->action = 0; |
| 940 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) |
| 941 | tbl->is_fat = 1; |
| 942 | else |
| 943 | tbl->is_fat = 0; |
| 944 | |
| 945 | if (tbl->is_fat) { |
| 946 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) |
| 947 | tbl->is_SGI = 1; |
| 948 | else |
| 949 | tbl->is_SGI = 0; |
| 950 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) |
| 951 | tbl->is_SGI = 1; |
| 952 | else |
| 953 | tbl->is_SGI = 0; |
| 954 | |
| 955 | rs_get_expected_tpt_table(lq_data, tbl); |
| 956 | |
| 957 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); |
| 958 | |
| 959 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); |
| 960 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) |
| 961 | return -1; |
| 962 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); |
| 963 | |
| 964 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", |
| 965 | tbl->current_rate.rate_n_flags, is_green); |
| 966 | |
| 967 | #endif /*CONFIG_IWLWIFI_HT */ |
| 968 | return rc; |
| 969 | } |
| 970 | |
| 971 | static int rs_switch_to_siso(struct iwl_priv *priv, |
| 972 | struct iwl_rate_scale_priv *lq_data, |
| 973 | struct iwl_scale_tbl_info *tbl, int index) |
| 974 | { |
| 975 | int rc = -1; |
| 976 | #ifdef CONFIG_IWLWIFI_HT |
| 977 | u16 rate_mask; |
| 978 | u8 is_green = lq_data->is_green; |
| 979 | s32 rate; |
| 980 | |
| 981 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); |
| 982 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| 983 | return -1; |
| 984 | |
| 985 | rc = 0; |
| 986 | tbl->is_dup = lq_data->is_dup; |
| 987 | tbl->lq_type = LQ_SISO; |
| 988 | tbl->action = 0; |
| 989 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, |
| 990 | &rate_mask); |
| 991 | |
| 992 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) |
| 993 | tbl->is_fat = 1; |
| 994 | else |
| 995 | tbl->is_fat = 0; |
| 996 | |
| 997 | if (tbl->is_fat) { |
| 998 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) |
| 999 | tbl->is_SGI = 1; |
| 1000 | else |
| 1001 | tbl->is_SGI = 0; |
| 1002 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) |
| 1003 | tbl->is_SGI = 1; |
| 1004 | else |
| 1005 | tbl->is_SGI = 0; |
| 1006 | |
| 1007 | if (is_green) |
| 1008 | tbl->is_SGI = 0; |
| 1009 | |
| 1010 | rs_get_expected_tpt_table(lq_data, tbl); |
| 1011 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); |
| 1012 | |
| 1013 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); |
| 1014 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
| 1015 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", |
| 1016 | rate, rate_mask); |
| 1017 | return -1; |
| 1018 | } |
| 1019 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); |
| 1020 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", |
| 1021 | tbl->current_rate.rate_n_flags, is_green); |
| 1022 | |
| 1023 | #endif /*CONFIG_IWLWIFI_HT */ |
| 1024 | return rc; |
| 1025 | } |
| 1026 | |
| 1027 | static int rs_move_legacy_other(struct iwl_priv *priv, |
| 1028 | struct iwl_rate_scale_priv *lq_data, |
| 1029 | int index) |
| 1030 | { |
| 1031 | int rc = 0; |
| 1032 | struct iwl_scale_tbl_info *tbl = |
| 1033 | &(lq_data->lq_info[lq_data->active_tbl]); |
| 1034 | struct iwl_scale_tbl_info *search_tbl = |
| 1035 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| 1036 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| 1037 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| 1038 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| 1039 | u8 start_action = tbl->action; |
| 1040 | |
| 1041 | for (; ;) { |
| 1042 | switch (tbl->action) { |
| 1043 | case IWL_LEGACY_SWITCH_ANTENNA: |
| 1044 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); |
| 1045 | |
| 1046 | search_tbl->lq_type = LQ_NONE; |
| 1047 | lq_data->action_counter++; |
| 1048 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| 1049 | break; |
| 1050 | if (!rs_is_other_ant_connected(lq_data->antenna, |
| 1051 | tbl->antenna_type)) |
| 1052 | break; |
| 1053 | |
| 1054 | memcpy(search_tbl, tbl, sz); |
| 1055 | |
| 1056 | rs_toggle_antenna(&(search_tbl->current_rate), |
| 1057 | search_tbl); |
| 1058 | rs_get_expected_tpt_table(lq_data, search_tbl); |
| 1059 | lq_data->search_better_tbl = 1; |
| 1060 | goto out; |
| 1061 | |
| 1062 | case IWL_LEGACY_SWITCH_SISO: |
| 1063 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); |
| 1064 | memcpy(search_tbl, tbl, sz); |
| 1065 | search_tbl->lq_type = LQ_SISO; |
| 1066 | search_tbl->is_SGI = 0; |
| 1067 | search_tbl->is_fat = 0; |
| 1068 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, |
| 1069 | index); |
| 1070 | if (!rc) { |
| 1071 | lq_data->search_better_tbl = 1; |
| 1072 | lq_data->action_counter = 0; |
| 1073 | } |
| 1074 | if (!rc) |
| 1075 | goto out; |
| 1076 | |
| 1077 | break; |
| 1078 | case IWL_LEGACY_SWITCH_MIMO: |
| 1079 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); |
| 1080 | memcpy(search_tbl, tbl, sz); |
| 1081 | search_tbl->lq_type = LQ_MIMO; |
| 1082 | search_tbl->is_SGI = 0; |
| 1083 | search_tbl->is_fat = 0; |
| 1084 | search_tbl->antenna_type = ANT_BOTH; |
| 1085 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, |
| 1086 | index); |
| 1087 | if (!rc) { |
| 1088 | lq_data->search_better_tbl = 1; |
| 1089 | lq_data->action_counter = 0; |
| 1090 | } |
| 1091 | if (!rc) |
| 1092 | goto out; |
| 1093 | break; |
| 1094 | } |
| 1095 | tbl->action++; |
| 1096 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) |
| 1097 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
| 1098 | |
| 1099 | if (tbl->action == start_action) |
| 1100 | break; |
| 1101 | |
| 1102 | } |
| 1103 | return 0; |
| 1104 | |
| 1105 | out: |
| 1106 | tbl->action++; |
| 1107 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) |
| 1108 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
| 1109 | return 0; |
| 1110 | |
| 1111 | } |
| 1112 | |
| 1113 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
| 1114 | struct iwl_rate_scale_priv *lq_data, |
| 1115 | int index) |
| 1116 | { |
| 1117 | int rc = -1; |
| 1118 | u8 is_green = lq_data->is_green; |
| 1119 | struct iwl_scale_tbl_info *tbl = |
| 1120 | &(lq_data->lq_info[lq_data->active_tbl]); |
| 1121 | struct iwl_scale_tbl_info *search_tbl = |
| 1122 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| 1123 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| 1124 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| 1125 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| 1126 | u8 start_action = tbl->action; |
| 1127 | |
| 1128 | for (;;) { |
| 1129 | lq_data->action_counter++; |
| 1130 | switch (tbl->action) { |
| 1131 | case IWL_SISO_SWITCH_ANTENNA: |
| 1132 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); |
| 1133 | search_tbl->lq_type = LQ_NONE; |
| 1134 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| 1135 | break; |
| 1136 | if (!rs_is_other_ant_connected(lq_data->antenna, |
| 1137 | tbl->antenna_type)) |
| 1138 | break; |
| 1139 | |
| 1140 | memcpy(search_tbl, tbl, sz); |
| 1141 | search_tbl->action = IWL_SISO_SWITCH_MIMO; |
| 1142 | rs_toggle_antenna(&(search_tbl->current_rate), |
| 1143 | search_tbl); |
| 1144 | lq_data->search_better_tbl = 1; |
| 1145 | |
| 1146 | goto out; |
| 1147 | |
| 1148 | case IWL_SISO_SWITCH_MIMO: |
| 1149 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); |
| 1150 | memcpy(search_tbl, tbl, sz); |
| 1151 | search_tbl->lq_type = LQ_MIMO; |
| 1152 | search_tbl->is_SGI = 0; |
| 1153 | search_tbl->is_fat = 0; |
| 1154 | search_tbl->antenna_type = ANT_BOTH; |
| 1155 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, |
| 1156 | index); |
| 1157 | if (!rc) |
| 1158 | lq_data->search_better_tbl = 1; |
| 1159 | |
| 1160 | if (!rc) |
| 1161 | goto out; |
| 1162 | break; |
| 1163 | case IWL_SISO_SWITCH_GI: |
| 1164 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); |
| 1165 | memcpy(search_tbl, tbl, sz); |
| 1166 | search_tbl->action = 0; |
| 1167 | if (search_tbl->is_SGI) |
| 1168 | search_tbl->is_SGI = 0; |
| 1169 | else if (!is_green) |
| 1170 | search_tbl->is_SGI = 1; |
| 1171 | else |
| 1172 | break; |
| 1173 | lq_data->search_better_tbl = 1; |
| 1174 | if ((tbl->lq_type == LQ_SISO) && |
| 1175 | (tbl->is_SGI)) { |
| 1176 | s32 tpt = lq_data->last_tpt / 100; |
| 1177 | if (((!tbl->is_fat) && |
| 1178 | (tpt >= expected_tpt_siso20MHz[index])) || |
| 1179 | ((tbl->is_fat) && |
| 1180 | (tpt >= expected_tpt_siso40MHz[index]))) |
| 1181 | lq_data->search_better_tbl = 0; |
| 1182 | } |
| 1183 | rs_get_expected_tpt_table(lq_data, search_tbl); |
| 1184 | rs_mcs_from_tbl(&search_tbl->current_rate, |
| 1185 | search_tbl, index, is_green); |
| 1186 | goto out; |
| 1187 | } |
| 1188 | tbl->action++; |
| 1189 | if (tbl->action > IWL_SISO_SWITCH_GI) |
| 1190 | tbl->action = IWL_SISO_SWITCH_ANTENNA; |
| 1191 | |
| 1192 | if (tbl->action == start_action) |
| 1193 | break; |
| 1194 | } |
| 1195 | return 0; |
| 1196 | |
| 1197 | out: |
| 1198 | tbl->action++; |
| 1199 | if (tbl->action > IWL_SISO_SWITCH_GI) |
| 1200 | tbl->action = IWL_SISO_SWITCH_ANTENNA; |
| 1201 | return 0; |
| 1202 | } |
| 1203 | |
| 1204 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
| 1205 | struct iwl_rate_scale_priv *lq_data, |
| 1206 | int index) |
| 1207 | { |
| 1208 | int rc = -1; |
| 1209 | s8 is_green = lq_data->is_green; |
| 1210 | struct iwl_scale_tbl_info *tbl = |
| 1211 | &(lq_data->lq_info[lq_data->active_tbl]); |
| 1212 | struct iwl_scale_tbl_info *search_tbl = |
| 1213 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| 1214 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| 1215 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| 1216 | u8 start_action = tbl->action; |
| 1217 | |
| 1218 | for (;;) { |
| 1219 | lq_data->action_counter++; |
| 1220 | switch (tbl->action) { |
| 1221 | case IWL_MIMO_SWITCH_ANTENNA_A: |
| 1222 | case IWL_MIMO_SWITCH_ANTENNA_B: |
| 1223 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); |
| 1224 | memcpy(search_tbl, tbl, sz); |
| 1225 | search_tbl->lq_type = LQ_SISO; |
| 1226 | search_tbl->is_SGI = 0; |
| 1227 | search_tbl->is_fat = 0; |
| 1228 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
| 1229 | search_tbl->antenna_type = ANT_MAIN; |
| 1230 | else |
| 1231 | search_tbl->antenna_type = ANT_AUX; |
| 1232 | |
| 1233 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, |
| 1234 | index); |
| 1235 | if (!rc) { |
| 1236 | lq_data->search_better_tbl = 1; |
| 1237 | goto out; |
| 1238 | } |
| 1239 | break; |
| 1240 | |
| 1241 | case IWL_MIMO_SWITCH_GI: |
| 1242 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); |
| 1243 | memcpy(search_tbl, tbl, sz); |
| 1244 | search_tbl->lq_type = LQ_MIMO; |
| 1245 | search_tbl->antenna_type = ANT_BOTH; |
| 1246 | search_tbl->action = 0; |
| 1247 | if (search_tbl->is_SGI) |
| 1248 | search_tbl->is_SGI = 0; |
| 1249 | else |
| 1250 | search_tbl->is_SGI = 1; |
| 1251 | lq_data->search_better_tbl = 1; |
| 1252 | if ((tbl->lq_type == LQ_MIMO) && |
| 1253 | (tbl->is_SGI)) { |
| 1254 | s32 tpt = lq_data->last_tpt / 100; |
| 1255 | if (((!tbl->is_fat) && |
| 1256 | (tpt >= expected_tpt_mimo20MHz[index])) || |
| 1257 | ((tbl->is_fat) && |
| 1258 | (tpt >= expected_tpt_mimo40MHz[index]))) |
| 1259 | lq_data->search_better_tbl = 0; |
| 1260 | } |
| 1261 | rs_get_expected_tpt_table(lq_data, search_tbl); |
| 1262 | rs_mcs_from_tbl(&search_tbl->current_rate, |
| 1263 | search_tbl, index, is_green); |
| 1264 | goto out; |
| 1265 | |
| 1266 | } |
| 1267 | tbl->action++; |
| 1268 | if (tbl->action > IWL_MIMO_SWITCH_GI) |
| 1269 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; |
| 1270 | |
| 1271 | if (tbl->action == start_action) |
| 1272 | break; |
| 1273 | } |
| 1274 | |
| 1275 | return 0; |
| 1276 | out: |
| 1277 | tbl->action++; |
| 1278 | if (tbl->action > IWL_MIMO_SWITCH_GI) |
| 1279 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; |
| 1280 | return 0; |
| 1281 | |
| 1282 | } |
| 1283 | |
| 1284 | static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) |
| 1285 | { |
| 1286 | struct iwl_scale_tbl_info *tbl; |
| 1287 | int i; |
| 1288 | int active_tbl; |
| 1289 | int flush_interval_passed = 0; |
| 1290 | |
| 1291 | active_tbl = lq_data->active_tbl; |
| 1292 | |
| 1293 | tbl = &(lq_data->lq_info[active_tbl]); |
| 1294 | |
| 1295 | if (lq_data->stay_in_tbl) { |
| 1296 | |
| 1297 | if (lq_data->flush_timer) |
| 1298 | flush_interval_passed = |
| 1299 | time_after(jiffies, |
| 1300 | (unsigned long)(lq_data->flush_timer + |
| 1301 | IWL_RATE_SCALE_FLUSH_INTVL)); |
| 1302 | |
| 1303 | flush_interval_passed = 0; |
| 1304 | if ((lq_data->total_failed > lq_data->max_failure_limit) || |
| 1305 | (lq_data->total_success > lq_data->max_success_limit) || |
| 1306 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) |
| 1307 | && (flush_interval_passed))) { |
| 1308 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", |
| 1309 | lq_data->total_failed, |
| 1310 | lq_data->total_success, |
| 1311 | flush_interval_passed); |
| 1312 | lq_data->stay_in_tbl = 0; |
| 1313 | lq_data->total_failed = 0; |
| 1314 | lq_data->total_success = 0; |
| 1315 | lq_data->flush_timer = 0; |
| 1316 | } else if (lq_data->table_count > 0) { |
| 1317 | lq_data->table_count++; |
| 1318 | if (lq_data->table_count >= |
| 1319 | lq_data->table_count_limit) { |
| 1320 | lq_data->table_count = 0; |
| 1321 | |
| 1322 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); |
| 1323 | for (i = 0; i < IWL_RATE_COUNT; i++) |
| 1324 | rs_rate_scale_clear_window( |
| 1325 | &(tbl->win[i])); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | if (!lq_data->stay_in_tbl) { |
| 1330 | for (i = 0; i < IWL_RATE_COUNT; i++) |
| 1331 | rs_rate_scale_clear_window(&(tbl->win[i])); |
| 1332 | } |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
| 1337 | struct net_device *dev, |
| 1338 | struct ieee80211_hdr *hdr, |
| 1339 | struct sta_info *sta) |
| 1340 | { |
| 1341 | int low = IWL_RATE_INVALID; |
| 1342 | int high = IWL_RATE_INVALID; |
| 1343 | int index; |
| 1344 | int i; |
| 1345 | struct iwl_rate_scale_data *window = NULL; |
| 1346 | int current_tpt = IWL_INVALID_VALUE; |
| 1347 | int low_tpt = IWL_INVALID_VALUE; |
| 1348 | int high_tpt = IWL_INVALID_VALUE; |
| 1349 | u32 fail_count; |
| 1350 | s8 scale_action = 0; |
| 1351 | u16 fc, rate_mask; |
| 1352 | u8 update_lq = 0; |
| 1353 | struct iwl_rate_scale_priv *lq_data; |
| 1354 | struct iwl_scale_tbl_info *tbl, *tbl1; |
| 1355 | u16 rate_scale_index_msk = 0; |
| 1356 | struct iwl_rate mcs_rate; |
| 1357 | u8 is_green = 0; |
| 1358 | u8 active_tbl = 0; |
| 1359 | u8 done_search = 0; |
| 1360 | u16 high_low; |
| 1361 | |
| 1362 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); |
| 1363 | |
| 1364 | fc = le16_to_cpu(hdr->frame_control); |
| 1365 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
| 1366 | /* Send management frames and broadcast/multicast data using |
| 1367 | * lowest rate. */ |
| 1368 | /* TODO: this could probably be improved.. */ |
| 1369 | return; |
| 1370 | } |
| 1371 | |
| 1372 | if (!sta || !sta->rate_ctrl_priv) |
| 1373 | return; |
| 1374 | |
| 1375 | if (!priv->lq_mngr.lq_ready) { |
| 1376 | IWL_DEBUG_RATE("still rate scaling not ready\n"); |
| 1377 | return; |
| 1378 | } |
| 1379 | lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| 1380 | |
| 1381 | if (!lq_data->search_better_tbl) |
| 1382 | active_tbl = lq_data->active_tbl; |
| 1383 | else |
| 1384 | active_tbl = 1 - lq_data->active_tbl; |
| 1385 | |
| 1386 | tbl = &(lq_data->lq_info[active_tbl]); |
| 1387 | is_green = lq_data->is_green; |
| 1388 | |
| 1389 | index = sta->last_txrate; |
| 1390 | |
| 1391 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, |
| 1392 | tbl->lq_type); |
| 1393 | |
| 1394 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, |
| 1395 | &rate_mask); |
| 1396 | |
| 1397 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); |
| 1398 | |
| 1399 | /* mask with station rate restriction */ |
| 1400 | if (is_legacy(tbl->lq_type)) { |
| 1401 | if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| 1402 | rate_scale_index_msk = (u16) (rate_mask & |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1403 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1404 | else |
| 1405 | rate_scale_index_msk = (u16) (rate_mask & |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1406 | lq_data->supp_rates); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1407 | |
| 1408 | } else |
| 1409 | rate_scale_index_msk = rate_mask; |
| 1410 | |
| 1411 | if (!rate_scale_index_msk) |
| 1412 | rate_scale_index_msk = rate_mask; |
| 1413 | |
| 1414 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { |
| 1415 | index = IWL_INVALID_VALUE; |
| 1416 | update_lq = 1; |
| 1417 | |
| 1418 | /* get the lowest availabe rate */ |
| 1419 | for (i = 0; i <= IWL_RATE_COUNT; i++) { |
| 1420 | if ((1 << i) & rate_scale_index_msk) |
| 1421 | index = i; |
| 1422 | } |
| 1423 | |
| 1424 | if (index == IWL_INVALID_VALUE) { |
| 1425 | IWL_WARNING("Can not find a suitable rate\n"); |
| 1426 | return; |
| 1427 | } |
| 1428 | } |
| 1429 | |
| 1430 | if (!tbl->expected_tpt) |
| 1431 | rs_get_expected_tpt_table(lq_data, tbl); |
| 1432 | |
| 1433 | window = &(tbl->win[index]); |
| 1434 | |
| 1435 | fail_count = window->counter - window->success_counter; |
| 1436 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
| 1437 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) |
| 1438 | || (tbl->expected_tpt == NULL)) { |
| 1439 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " |
| 1440 | "for index %d\n", |
| 1441 | window->success_counter, window->counter, index); |
| 1442 | window->average_tpt = IWL_INVALID_VALUE; |
| 1443 | rs_stay_in_table(lq_data); |
| 1444 | if (update_lq) { |
| 1445 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1446 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1447 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| 1448 | } |
| 1449 | goto out; |
| 1450 | |
| 1451 | } else |
| 1452 | window->average_tpt = ((window->success_ratio * |
| 1453 | tbl->expected_tpt[index] + 64) / 128); |
| 1454 | |
| 1455 | if (lq_data->search_better_tbl) { |
| 1456 | int success_limit = IWL_RATE_SCALE_SWITCH; |
| 1457 | |
| 1458 | if ((window->success_ratio > success_limit) || |
| 1459 | (window->average_tpt > lq_data->last_tpt)) { |
| 1460 | if (!is_legacy(tbl->lq_type)) { |
| 1461 | IWL_DEBUG_HT("LQ: we are switching to HT" |
| 1462 | " rate suc %d current tpt %d" |
| 1463 | " old tpt %d\n", |
| 1464 | window->success_ratio, |
| 1465 | window->average_tpt, |
| 1466 | lq_data->last_tpt); |
| 1467 | lq_data->enable_counter = 1; |
| 1468 | } |
| 1469 | lq_data->active_tbl = active_tbl; |
| 1470 | current_tpt = window->average_tpt; |
| 1471 | } else { |
| 1472 | tbl->lq_type = LQ_NONE; |
| 1473 | active_tbl = lq_data->active_tbl; |
| 1474 | tbl = &(lq_data->lq_info[active_tbl]); |
| 1475 | |
| 1476 | index = iwl_rate_index_from_plcp( |
| 1477 | tbl->current_rate.rate_n_flags); |
| 1478 | |
| 1479 | update_lq = 1; |
| 1480 | current_tpt = lq_data->last_tpt; |
| 1481 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); |
| 1482 | } |
| 1483 | lq_data->search_better_tbl = 0; |
| 1484 | done_search = 1; |
| 1485 | goto lq_update; |
| 1486 | } |
| 1487 | |
| 1488 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, |
| 1489 | tbl->lq_type); |
| 1490 | low = high_low & 0xff; |
| 1491 | high = (high_low >> 8) & 0xff; |
| 1492 | |
| 1493 | current_tpt = window->average_tpt; |
| 1494 | |
| 1495 | if (low != IWL_RATE_INVALID) |
| 1496 | low_tpt = tbl->win[low].average_tpt; |
| 1497 | |
| 1498 | if (high != IWL_RATE_INVALID) |
| 1499 | high_tpt = tbl->win[high].average_tpt; |
| 1500 | |
| 1501 | |
| 1502 | scale_action = 1; |
| 1503 | |
| 1504 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || |
| 1505 | (current_tpt == 0)) { |
| 1506 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
| 1507 | scale_action = -1; |
| 1508 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
| 1509 | (high_tpt == IWL_INVALID_VALUE)) |
| 1510 | scale_action = 1; |
| 1511 | else if ((low_tpt != IWL_INVALID_VALUE) && |
| 1512 | (high_tpt != IWL_INVALID_VALUE) && |
| 1513 | (low_tpt < current_tpt) && |
| 1514 | (high_tpt < current_tpt)) |
| 1515 | scale_action = 0; |
| 1516 | else { |
| 1517 | if (high_tpt != IWL_INVALID_VALUE) { |
| 1518 | if (high_tpt > current_tpt) |
| 1519 | scale_action = 1; |
| 1520 | else { |
| 1521 | IWL_DEBUG_RATE |
| 1522 | ("decrease rate because of high tpt\n"); |
| 1523 | scale_action = -1; |
| 1524 | } |
| 1525 | } else if (low_tpt != IWL_INVALID_VALUE) { |
| 1526 | if (low_tpt > current_tpt) { |
| 1527 | IWL_DEBUG_RATE |
| 1528 | ("decrease rate because of low tpt\n"); |
| 1529 | scale_action = -1; |
| 1530 | } else |
| 1531 | scale_action = 1; |
| 1532 | } |
| 1533 | } |
| 1534 | |
| 1535 | if (scale_action == -1) { |
| 1536 | if ((low != IWL_RATE_INVALID) && |
| 1537 | ((window->success_ratio > IWL_RATE_HIGH_TH) || |
| 1538 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
| 1539 | scale_action = 0; |
| 1540 | } else if ((scale_action == 1) && |
| 1541 | (window->success_ratio < IWL_RATE_INCREASE_TH)) |
| 1542 | scale_action = 0; |
| 1543 | |
| 1544 | switch (scale_action) { |
| 1545 | case -1: |
| 1546 | if (low != IWL_RATE_INVALID) { |
| 1547 | update_lq = 1; |
| 1548 | index = low; |
| 1549 | } |
| 1550 | break; |
| 1551 | case 1: |
| 1552 | if (high != IWL_RATE_INVALID) { |
| 1553 | update_lq = 1; |
| 1554 | index = high; |
| 1555 | } |
| 1556 | |
| 1557 | break; |
| 1558 | case 0: |
| 1559 | default: |
| 1560 | break; |
| 1561 | } |
| 1562 | |
| 1563 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " |
| 1564 | "high %d type %d\n", |
| 1565 | index, scale_action, low, high, tbl->lq_type); |
| 1566 | |
| 1567 | lq_update: |
| 1568 | if (update_lq) { |
| 1569 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1570 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1571 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| 1572 | } |
| 1573 | rs_stay_in_table(lq_data); |
| 1574 | |
| 1575 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { |
| 1576 | lq_data->last_tpt = current_tpt; |
| 1577 | |
| 1578 | if (is_legacy(tbl->lq_type)) |
| 1579 | rs_move_legacy_other(priv, lq_data, index); |
| 1580 | else if (is_siso(tbl->lq_type)) |
| 1581 | rs_move_siso_to_other(priv, lq_data, index); |
| 1582 | else |
| 1583 | rs_move_mimo_to_other(priv, lq_data, index); |
| 1584 | |
| 1585 | if (lq_data->search_better_tbl) { |
| 1586 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| 1587 | for (i = 0; i < IWL_RATE_COUNT; i++) |
| 1588 | rs_rate_scale_clear_window(&(tbl->win[i])); |
| 1589 | |
| 1590 | index = iwl_rate_index_from_plcp( |
| 1591 | tbl->current_rate.rate_n_flags); |
| 1592 | |
| 1593 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", |
| 1594 | tbl->current_rate.rate_n_flags, index); |
| 1595 | rs_fill_link_cmd(lq_data, &tbl->current_rate, |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1596 | &lq_data->lq); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1597 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| 1598 | } |
| 1599 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); |
| 1600 | |
| 1601 | if (is_legacy(tbl1->lq_type) && |
| 1602 | #ifdef CONFIG_IWLWIFI_HT |
| 1603 | !priv->current_assoc_ht.is_ht && |
| 1604 | #endif |
| 1605 | (lq_data->action_counter >= 1)) { |
| 1606 | lq_data->action_counter = 0; |
| 1607 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); |
| 1608 | rs_set_stay_in_table(1, lq_data); |
| 1609 | } |
| 1610 | |
| 1611 | if (lq_data->enable_counter && |
| 1612 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { |
| 1613 | #ifdef CONFIG_IWLWIFI_HT_AGG |
| 1614 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && |
| 1615 | (priv->lq_mngr.agg_ctrl.auto_agg)) { |
| 1616 | priv->lq_mngr.agg_ctrl.tid_retry = |
| 1617 | TID_ALL_SPECIFIED; |
| 1618 | schedule_work(&priv->agg_work); |
| 1619 | } |
| 1620 | #endif /*CONFIG_IWLWIFI_HT_AGG */ |
| 1621 | lq_data->action_counter = 0; |
| 1622 | rs_set_stay_in_table(0, lq_data); |
| 1623 | } |
| 1624 | } else { |
| 1625 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) |
| 1626 | lq_data->flush_timer = jiffies; |
| 1627 | } |
| 1628 | |
| 1629 | out: |
| 1630 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); |
| 1631 | i = index; |
| 1632 | sta->last_txrate = i; |
| 1633 | |
| 1634 | /* sta->txrate is an index to A mode rates which start |
| 1635 | * at IWL_FIRST_OFDM_RATE |
| 1636 | */ |
| 1637 | if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| 1638 | sta->txrate = i - IWL_FIRST_OFDM_RATE; |
| 1639 | else |
| 1640 | sta->txrate = i; |
| 1641 | |
| 1642 | return; |
| 1643 | } |
| 1644 | |
| 1645 | |
| 1646 | static void rs_initialize_lq(struct iwl_priv *priv, |
| 1647 | struct sta_info *sta) |
| 1648 | { |
| 1649 | int i; |
| 1650 | struct iwl_rate_scale_priv *lq; |
| 1651 | struct iwl_scale_tbl_info *tbl; |
| 1652 | u8 active_tbl = 0; |
| 1653 | int rate_idx; |
| 1654 | u8 use_green = rs_use_green(priv); |
| 1655 | struct iwl_rate mcs_rate; |
| 1656 | |
| 1657 | if (!sta || !sta->rate_ctrl_priv) |
| 1658 | goto out; |
| 1659 | |
| 1660 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| 1661 | i = sta->last_txrate; |
| 1662 | |
| 1663 | if ((lq->lq.sta_id == 0xff) && |
| 1664 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
| 1665 | goto out; |
| 1666 | |
| 1667 | if (!lq->search_better_tbl) |
| 1668 | active_tbl = lq->active_tbl; |
| 1669 | else |
| 1670 | active_tbl = 1 - lq->active_tbl; |
| 1671 | |
| 1672 | tbl = &(lq->lq_info[active_tbl]); |
| 1673 | |
| 1674 | if ((i < 0) || (i >= IWL_RATE_COUNT)) |
| 1675 | i = 0; |
| 1676 | |
| 1677 | mcs_rate.rate_n_flags = iwl_rates[i].plcp ; |
| 1678 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| 1679 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; |
| 1680 | |
| 1681 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) |
| 1682 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; |
| 1683 | |
| 1684 | tbl->antenna_type = ANT_AUX; |
| 1685 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); |
| 1686 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) |
Zhu Yi | 46640a8 | 2007-09-27 11:27:34 +0800 | [diff] [blame] | 1687 | rs_toggle_antenna(&mcs_rate, tbl); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1688 | |
| 1689 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); |
| 1690 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; |
| 1691 | rs_get_expected_tpt_table(lq, tbl); |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1692 | rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1693 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
| 1694 | out: |
| 1695 | return; |
| 1696 | } |
| 1697 | |
| 1698 | static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local |
| 1699 | *local) |
| 1700 | { |
| 1701 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; |
| 1702 | int i; |
| 1703 | |
| 1704 | for (i = 0; i < mode->num_rates; i++) { |
| 1705 | struct ieee80211_rate *rate = &mode->rates[i]; |
| 1706 | |
| 1707 | if (rate->flags & IEEE80211_RATE_SUPPORTED) |
| 1708 | return rate; |
| 1709 | } |
| 1710 | |
| 1711 | return &mode->rates[0]; |
| 1712 | } |
| 1713 | |
| 1714 | static struct ieee80211_rate *rs_get_rate(void *priv_rate, |
| 1715 | struct net_device *dev, |
| 1716 | struct sk_buff *skb, |
| 1717 | struct rate_control_extra |
| 1718 | *extra) |
| 1719 | { |
| 1720 | |
| 1721 | int i; |
| 1722 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 1723 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1724 | struct sta_info *sta; |
| 1725 | u16 fc; |
| 1726 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| 1727 | struct iwl_rate_scale_priv *lq; |
| 1728 | |
Zhu Yi | 5882635 | 2007-09-27 11:27:39 +0800 | [diff] [blame] | 1729 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1730 | |
| 1731 | memset(extra, 0, sizeof(*extra)); |
| 1732 | |
| 1733 | fc = le16_to_cpu(hdr->frame_control); |
| 1734 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
| 1735 | /* Send management frames and broadcast/multicast data using |
| 1736 | * lowest rate. */ |
| 1737 | /* TODO: this could probably be improved.. */ |
| 1738 | return rs_get_lowest_rate(local); |
| 1739 | } |
| 1740 | |
| 1741 | sta = sta_info_get(local, hdr->addr1); |
| 1742 | |
| 1743 | if (!sta || !sta->rate_ctrl_priv) { |
| 1744 | if (sta) |
| 1745 | sta_info_put(sta); |
| 1746 | return rs_get_lowest_rate(local); |
| 1747 | } |
| 1748 | |
| 1749 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| 1750 | i = sta->last_txrate; |
| 1751 | |
| 1752 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { |
| 1753 | u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1754 | DECLARE_MAC_BUF(mac); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1755 | |
| 1756 | if (sta_id == IWL_INVALID_STATION) { |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1757 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
| 1758 | print_mac(mac, hdr->addr1)); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1759 | sta_id = iwl_add_station(priv, |
| 1760 | hdr->addr1, 0, CMD_ASYNC); |
| 1761 | } |
| 1762 | if ((sta_id != IWL_INVALID_STATION)) { |
| 1763 | lq->lq.sta_id = sta_id; |
| 1764 | lq->lq.rs_table[0].rate_n_flags = 0; |
| 1765 | lq->ibss_sta_added = 1; |
| 1766 | rs_initialize_lq(priv, sta); |
| 1767 | } |
| 1768 | if (!lq->ibss_sta_added) |
| 1769 | goto done; |
| 1770 | } |
| 1771 | |
| 1772 | done: |
| 1773 | sta_info_put(sta); |
| 1774 | if ((i < 0) || (i > IWL_RATE_COUNT)) |
| 1775 | return rs_get_lowest_rate(local); |
| 1776 | |
| 1777 | return &priv->ieee_rates[i]; |
| 1778 | } |
| 1779 | |
| 1780 | static void *rs_alloc_sta(void *priv, gfp_t gfp) |
| 1781 | { |
| 1782 | struct iwl_rate_scale_priv *crl; |
| 1783 | int i, j; |
| 1784 | |
| 1785 | IWL_DEBUG_RATE("create station rate scale window\n"); |
| 1786 | |
| 1787 | crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); |
| 1788 | |
| 1789 | if (crl == NULL) |
| 1790 | return NULL; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1791 | crl->lq.sta_id = 0xff; |
| 1792 | |
Zhu Yi | 63fddb9 | 2007-09-27 11:27:36 +0800 | [diff] [blame] | 1793 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1794 | for (j = 0; j < LQ_SIZE; j++) |
| 1795 | for (i = 0; i < IWL_RATE_COUNT; i++) |
| 1796 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); |
| 1797 | |
| 1798 | return crl; |
| 1799 | } |
| 1800 | |
| 1801 | static void rs_rate_init(void *priv_rate, void *priv_sta, |
| 1802 | struct ieee80211_local *local, |
| 1803 | struct sta_info *sta) |
| 1804 | { |
| 1805 | int i, j; |
| 1806 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; |
| 1807 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| 1808 | struct iwl_rate_scale_priv *crl = priv_sta; |
| 1809 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1810 | crl->flush_timer = 0; |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1811 | crl->supp_rates = sta->supp_rates; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1812 | sta->txrate = 3; |
| 1813 | for (j = 0; j < LQ_SIZE; j++) |
| 1814 | for (i = 0; i < IWL_RATE_COUNT; i++) |
| 1815 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); |
| 1816 | |
| 1817 | IWL_DEBUG_RATE("rate scale global init\n"); |
| 1818 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
| 1819 | * the lowest or the highest rate.. Could consider using RSSI from |
| 1820 | * previous packets? Need to have IEEE 802.1X auth succeed immediately |
| 1821 | * after assoc.. */ |
| 1822 | |
| 1823 | crl->ibss_sta_added = 0; |
| 1824 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
| 1825 | u8 sta_id = iwl_hw_find_station(priv, sta->addr); |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1826 | DECLARE_MAC_BUF(mac); |
| 1827 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1828 | /* for IBSS the call are from tasklet */ |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1829 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
| 1830 | print_mac(mac, sta->addr)); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1831 | |
| 1832 | if (sta_id == IWL_INVALID_STATION) { |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1833 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
| 1834 | print_mac(mac, sta->addr)); |
| 1835 | sta_id = iwl_add_station(priv, |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1836 | sta->addr, 0, CMD_ASYNC); |
| 1837 | } |
| 1838 | if ((sta_id != IWL_INVALID_STATION)) { |
| 1839 | crl->lq.sta_id = sta_id; |
| 1840 | crl->lq.rs_table[0].rate_n_flags = 0; |
| 1841 | } |
| 1842 | /* FIXME: this is w/a remove it later */ |
| 1843 | priv->assoc_station_added = 1; |
| 1844 | } |
| 1845 | |
| 1846 | for (i = 0; i < mode->num_rates; i++) { |
| 1847 | if ((sta->supp_rates & BIT(i)) && |
| 1848 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) |
| 1849 | sta->txrate = i; |
| 1850 | } |
| 1851 | sta->last_txrate = sta->txrate; |
| 1852 | /* For MODE_IEEE80211A mode cck rate are at end |
| 1853 | * rate table |
| 1854 | */ |
| 1855 | if (local->hw.conf.phymode == MODE_IEEE80211A) |
| 1856 | sta->last_txrate += IWL_FIRST_OFDM_RATE; |
| 1857 | |
| 1858 | crl->is_dup = priv->is_dup; |
| 1859 | crl->valid_antenna = priv->valid_antenna; |
| 1860 | crl->antenna = priv->antenna; |
| 1861 | crl->is_green = rs_use_green(priv); |
| 1862 | crl->active_rate = priv->active_rate; |
| 1863 | crl->active_rate &= ~(0x1000); |
| 1864 | crl->active_rate_basic = priv->active_rate_basic; |
| 1865 | crl->phymode = priv->phymode; |
| 1866 | #ifdef CONFIG_IWLWIFI_HT |
| 1867 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); |
| 1868 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); |
| 1869 | crl->active_siso_rate &= ~((u16)0x2); |
| 1870 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; |
| 1871 | |
| 1872 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); |
| 1873 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); |
| 1874 | crl->active_mimo_rate &= ~((u16)0x2); |
| 1875 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; |
| 1876 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, |
| 1877 | crl->active_mimo_rate); |
| 1878 | #endif /*CONFIG_IWLWIFI_HT*/ |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 1879 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 1880 | crl->drv = priv; |
| 1881 | #endif |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1882 | |
| 1883 | if (priv->assoc_station_added) |
| 1884 | priv->lq_mngr.lq_ready = 1; |
| 1885 | |
| 1886 | rs_initialize_lq(priv, sta); |
| 1887 | } |
| 1888 | |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1889 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1890 | struct iwl_rate *tx_mcs, |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1891 | struct iwl_link_quality_cmd *lq_cmd) |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1892 | { |
| 1893 | int index = 0; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1894 | int rate_idx; |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1895 | int repeat_rate = 0; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1896 | u8 ant_toggle_count = 0; |
| 1897 | u8 use_ht_possible = 1; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1898 | struct iwl_rate new_rate; |
| 1899 | struct iwl_scale_tbl_info tbl_type = { 0 }; |
| 1900 | |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 1901 | rs_dbgfs_set_mcs(lq_data, tx_mcs, index); |
| 1902 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1903 | rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, |
| 1904 | &tbl_type, &rate_idx); |
| 1905 | |
| 1906 | if (is_legacy(tbl_type.lq_type)) { |
| 1907 | ant_toggle_count = 1; |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1908 | repeat_rate = IWL_NUMBER_TRY; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1909 | } else |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1910 | repeat_rate = IWL_HT_NUMBER_TRY; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1911 | |
| 1912 | lq_cmd->general_params.mimo_delimiter = |
| 1913 | is_mimo(tbl_type.lq_type) ? 1 : 0; |
| 1914 | lq_cmd->rs_table[index].rate_n_flags = |
| 1915 | cpu_to_le32(tx_mcs->rate_n_flags); |
| 1916 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; |
| 1917 | |
| 1918 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) |
| 1919 | lq_cmd->general_params.single_stream_ant_msk = 1; |
| 1920 | else |
| 1921 | lq_cmd->general_params.single_stream_ant_msk = 2; |
| 1922 | |
| 1923 | index++; |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1924 | repeat_rate--; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1925 | |
| 1926 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1927 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1928 | if (is_legacy(tbl_type.lq_type)) { |
| 1929 | if (ant_toggle_count < |
| 1930 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) |
| 1931 | ant_toggle_count++; |
| 1932 | else { |
| 1933 | rs_toggle_antenna(&new_rate, &tbl_type); |
| 1934 | ant_toggle_count = 1; |
| 1935 | } |
| 1936 | } |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 1937 | |
| 1938 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1939 | lq_cmd->rs_table[index].rate_n_flags = |
| 1940 | cpu_to_le32(new_rate.rate_n_flags); |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1941 | repeat_rate--; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1942 | index++; |
| 1943 | } |
| 1944 | |
| 1945 | rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, |
| 1946 | &rate_idx); |
| 1947 | |
| 1948 | if (is_mimo(tbl_type.lq_type)) |
| 1949 | lq_cmd->general_params.mimo_delimiter = index; |
| 1950 | |
| 1951 | rs_get_lower_rate(lq_data, &tbl_type, rate_idx, |
Zhu Yi | 02dede0 | 2007-09-27 11:27:40 +0800 | [diff] [blame] | 1952 | use_ht_possible, &new_rate); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1953 | |
| 1954 | if (is_legacy(tbl_type.lq_type)) { |
| 1955 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) |
| 1956 | ant_toggle_count++; |
| 1957 | else { |
| 1958 | rs_toggle_antenna(&new_rate, &tbl_type); |
| 1959 | ant_toggle_count = 1; |
| 1960 | } |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1961 | repeat_rate = IWL_NUMBER_TRY; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1962 | } else |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1963 | repeat_rate = IWL_HT_NUMBER_TRY; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1964 | |
| 1965 | use_ht_possible = 0; |
| 1966 | |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 1967 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1968 | lq_cmd->rs_table[index].rate_n_flags = |
| 1969 | cpu_to_le32(new_rate.rate_n_flags); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1970 | |
| 1971 | index++; |
Zhu Yi | 1b696de | 2007-09-27 11:27:41 +0800 | [diff] [blame] | 1972 | repeat_rate--; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1973 | } |
| 1974 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1975 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
| 1976 | lq_cmd->agg_params.agg_dis_start_th = 3; |
| 1977 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1978 | } |
| 1979 | |
| 1980 | static void *rs_alloc(struct ieee80211_local *local) |
| 1981 | { |
| 1982 | return local->hw.priv; |
| 1983 | } |
| 1984 | /* rate scale requires free function to be implemented */ |
| 1985 | static void rs_free(void *priv_rate) |
| 1986 | { |
| 1987 | return; |
| 1988 | } |
| 1989 | |
| 1990 | static void rs_clear(void *priv_rate) |
| 1991 | { |
| 1992 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
| 1993 | |
| 1994 | IWL_DEBUG_RATE("enter\n"); |
| 1995 | |
| 1996 | priv->lq_mngr.lq_ready = 0; |
| 1997 | #ifdef CONFIG_IWLWIFI_HT |
| 1998 | #ifdef CONFIG_IWLWIFI_HT_AGG |
| 1999 | if (priv->lq_mngr.agg_ctrl.granted_ba) |
| 2000 | iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); |
| 2001 | #endif /*CONFIG_IWLWIFI_HT_AGG */ |
| 2002 | #endif /* CONFIG_IWLWIFI_HT */ |
| 2003 | |
| 2004 | IWL_DEBUG_RATE("leave\n"); |
| 2005 | } |
| 2006 | |
| 2007 | static void rs_free_sta(void *priv, void *priv_sta) |
| 2008 | { |
| 2009 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| 2010 | |
| 2011 | IWL_DEBUG_RATE("enter\n"); |
| 2012 | kfree(rs_priv); |
| 2013 | IWL_DEBUG_RATE("leave\n"); |
| 2014 | } |
| 2015 | |
| 2016 | |
Zhu Yi | 93dc646 | 2007-09-27 11:27:37 +0800 | [diff] [blame] | 2017 | #ifdef CONFIG_MAC80211_DEBUGFS |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2018 | static int open_file_generic(struct inode *inode, struct file *file) |
| 2019 | { |
| 2020 | file->private_data = inode->i_private; |
| 2021 | return 0; |
| 2022 | } |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 2023 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
| 2024 | struct iwl_rate *mcs, int index) |
| 2025 | { |
| 2026 | const u32 cck_rate = 0x820A; |
| 2027 | if (rs_priv->dbg_fixed.rate_n_flags) { |
| 2028 | if (index < 12) |
| 2029 | mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; |
| 2030 | else |
| 2031 | mcs->rate_n_flags = cck_rate; |
| 2032 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
| 2033 | return; |
| 2034 | } |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2035 | |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 2036 | IWL_DEBUG_RATE("Fixed rate OFF\n"); |
| 2037 | } |
| 2038 | |
| 2039 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
| 2040 | const char __user *user_buf, size_t count, loff_t *ppos) |
| 2041 | { |
| 2042 | struct iwl_rate_scale_priv *rs_priv = file->private_data; |
| 2043 | char buf[64]; |
| 2044 | int buf_size; |
| 2045 | u32 parsed_rate; |
| 2046 | |
| 2047 | memset(buf, 0, sizeof(buf)); |
| 2048 | buf_size = min(count, sizeof(buf) - 1); |
| 2049 | if (copy_from_user(buf, user_buf, buf_size)) |
| 2050 | return -EFAULT; |
| 2051 | |
| 2052 | if (sscanf(buf, "%x", &parsed_rate) == 1) |
| 2053 | rs_priv->dbg_fixed.rate_n_flags = parsed_rate; |
| 2054 | else |
| 2055 | rs_priv->dbg_fixed.rate_n_flags = 0; |
| 2056 | |
| 2057 | rs_priv->active_rate = 0x0FFF; |
| 2058 | rs_priv->active_siso_rate = 0x1FD0; |
| 2059 | rs_priv->active_mimo_rate = 0x1FD0; |
| 2060 | |
| 2061 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", |
| 2062 | rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); |
| 2063 | |
| 2064 | if (rs_priv->dbg_fixed.rate_n_flags) { |
| 2065 | rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); |
| 2066 | rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); |
| 2067 | } |
| 2068 | |
| 2069 | return count; |
| 2070 | } |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2071 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
| 2072 | char __user *user_buf, size_t count, loff_t *ppos) |
| 2073 | { |
| 2074 | char buff[1024]; |
| 2075 | int desc = 0; |
| 2076 | int i = 0; |
| 2077 | |
| 2078 | struct iwl_rate_scale_priv *rs_priv = file->private_data; |
| 2079 | |
| 2080 | desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 2081 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2082 | rs_priv->total_failed, rs_priv->total_success, |
| 2083 | rs_priv->active_rate); |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 2084 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
| 2085 | rs_priv->dbg_fixed.rate_n_flags); |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2086 | desc += sprintf(buff+desc, "general:" |
| 2087 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", |
| 2088 | rs_priv->lq.general_params.flags, |
| 2089 | rs_priv->lq.general_params.mimo_delimiter, |
| 2090 | rs_priv->lq.general_params.single_stream_ant_msk, |
| 2091 | rs_priv->lq.general_params.dual_stream_ant_msk); |
| 2092 | |
| 2093 | desc += sprintf(buff+desc, "agg:" |
| 2094 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", |
| 2095 | le16_to_cpu(rs_priv->lq.agg_params.agg_time_limit), |
| 2096 | rs_priv->lq.agg_params.agg_dis_start_th, |
| 2097 | rs_priv->lq.agg_params.agg_frame_cnt_limit); |
| 2098 | |
| 2099 | desc += sprintf(buff+desc, |
| 2100 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", |
| 2101 | rs_priv->lq.general_params.start_rate_index[0], |
| 2102 | rs_priv->lq.general_params.start_rate_index[1], |
| 2103 | rs_priv->lq.general_params.start_rate_index[2], |
| 2104 | rs_priv->lq.general_params.start_rate_index[3]); |
| 2105 | |
| 2106 | |
| 2107 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
| 2108 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", |
| 2109 | i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); |
| 2110 | |
| 2111 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
| 2112 | } |
| 2113 | |
| 2114 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { |
Zhu Yi | 98d7e09 | 2007-09-27 11:27:42 +0800 | [diff] [blame^] | 2115 | .write = rs_sta_dbgfs_scale_table_write, |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2116 | .read = rs_sta_dbgfs_scale_table_read, |
| 2117 | .open = open_file_generic, |
| 2118 | }; |
| 2119 | |
Zhu Yi | 93dc646 | 2007-09-27 11:27:37 +0800 | [diff] [blame] | 2120 | static void rs_add_debugfs(void *priv, void *priv_sta, |
| 2121 | struct dentry *dir) |
| 2122 | { |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2123 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| 2124 | rs_priv->rs_sta_dbgfs_scale_table_file = |
| 2125 | debugfs_create_file("rate_scale_table", 0444, dir, |
| 2126 | rs_priv, &rs_sta_dbgfs_scale_table_ops); |
Zhu Yi | 93dc646 | 2007-09-27 11:27:37 +0800 | [diff] [blame] | 2127 | } |
| 2128 | |
| 2129 | static void rs_remove_debugfs(void *priv, void *priv_sta) |
| 2130 | { |
Zhu Yi | 5ae212c | 2007-09-27 11:27:38 +0800 | [diff] [blame] | 2131 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| 2132 | debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); |
Zhu Yi | 93dc646 | 2007-09-27 11:27:37 +0800 | [diff] [blame] | 2133 | } |
| 2134 | #endif |
| 2135 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 2136 | static struct rate_control_ops rs_ops = { |
| 2137 | .module = NULL, |
| 2138 | .name = RS_NAME, |
| 2139 | .tx_status = rs_tx_status, |
| 2140 | .get_rate = rs_get_rate, |
| 2141 | .rate_init = rs_rate_init, |
| 2142 | .clear = rs_clear, |
| 2143 | .alloc = rs_alloc, |
| 2144 | .free = rs_free, |
| 2145 | .alloc_sta = rs_alloc_sta, |
| 2146 | .free_sta = rs_free_sta, |
Zhu Yi | 93dc646 | 2007-09-27 11:27:37 +0800 | [diff] [blame] | 2147 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 2148 | .add_sta_debugfs = rs_add_debugfs, |
| 2149 | .remove_sta_debugfs = rs_remove_debugfs, |
| 2150 | #endif |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 2151 | }; |
| 2152 | |
| 2153 | int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
| 2154 | { |
| 2155 | struct ieee80211_local *local = hw_to_local(hw); |
| 2156 | struct iwl_priv *priv = hw->priv; |
| 2157 | struct iwl_rate_scale_priv *rs_priv; |
| 2158 | struct sta_info *sta; |
| 2159 | int count = 0, i; |
| 2160 | u32 samples = 0, success = 0, good = 0; |
| 2161 | unsigned long now = jiffies; |
| 2162 | u32 max_time = 0; |
| 2163 | u8 lq_type, antenna; |
| 2164 | |
| 2165 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
| 2166 | if (!sta || !sta->rate_ctrl_priv) { |
| 2167 | if (sta) { |
| 2168 | sta_info_put(sta); |
| 2169 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
| 2170 | } else |
| 2171 | IWL_DEBUG_RATE("leave - no station!\n"); |
| 2172 | return sprintf(buf, "station %d not found\n", sta_id); |
| 2173 | } |
| 2174 | |
| 2175 | rs_priv = (void *)sta->rate_ctrl_priv; |
| 2176 | |
| 2177 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; |
| 2178 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; |
| 2179 | |
| 2180 | if (is_legacy(lq_type)) |
| 2181 | i = IWL_RATE_54M_INDEX; |
| 2182 | else |
| 2183 | i = IWL_RATE_60M_INDEX; |
| 2184 | while (1) { |
| 2185 | u64 mask; |
| 2186 | int j; |
| 2187 | int active = rs_priv->active_tbl; |
| 2188 | |
| 2189 | count += |
| 2190 | sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); |
| 2191 | |
| 2192 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); |
| 2193 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) |
| 2194 | buf[count++] = |
| 2195 | (rs_priv->lq_info[active].win[i].data & mask) |
| 2196 | ? '1' : '0'; |
| 2197 | |
| 2198 | samples += rs_priv->lq_info[active].win[i].counter; |
| 2199 | good += rs_priv->lq_info[active].win[i].success_counter; |
| 2200 | success += rs_priv->lq_info[active].win[i].success_counter * |
| 2201 | iwl_rates[i].ieee; |
| 2202 | |
| 2203 | if (rs_priv->lq_info[active].win[i].stamp) { |
| 2204 | int delta = |
| 2205 | jiffies_to_msecs(now - |
| 2206 | rs_priv->lq_info[active].win[i].stamp); |
| 2207 | |
| 2208 | if (delta > max_time) |
| 2209 | max_time = delta; |
| 2210 | |
| 2211 | count += sprintf(&buf[count], "%5dms\n", delta); |
| 2212 | } else |
| 2213 | buf[count++] = '\n'; |
| 2214 | |
| 2215 | j = iwl_get_prev_ieee_rate(i); |
| 2216 | if (j == i) |
| 2217 | break; |
| 2218 | i = j; |
| 2219 | } |
| 2220 | |
| 2221 | /* Display the average rate of all samples taken. |
| 2222 | * |
| 2223 | * NOTE: We multiple # of samples by 2 since the IEEE measurement |
| 2224 | * added from iwl_rates is actually 2X the rate */ |
| 2225 | if (samples) |
| 2226 | count += sprintf(&buf[count], |
| 2227 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
| 2228 | "%3d%% success (%d good packets over %d tries)\n", |
| 2229 | success / (2 * samples), (success * 5 / samples) % 10, |
| 2230 | max_time, good * 100 / samples, good, samples); |
| 2231 | else |
| 2232 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); |
| 2233 | count += sprintf(&buf[count], "\nrate scale type %d anntena %d " |
| 2234 | "active_search %d rate index %d\n", lq_type, antenna, |
| 2235 | rs_priv->search_better_tbl, sta->last_txrate); |
| 2236 | |
| 2237 | sta_info_put(sta); |
| 2238 | return count; |
| 2239 | } |
| 2240 | |
| 2241 | void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
| 2242 | { |
| 2243 | struct iwl_priv *priv = hw->priv; |
| 2244 | |
| 2245 | priv->lq_mngr.lq_ready = 1; |
| 2246 | } |
| 2247 | |
| 2248 | void iwl_rate_control_register(struct ieee80211_hw *hw) |
| 2249 | { |
| 2250 | ieee80211_rate_control_register(&rs_ops); |
| 2251 | } |
| 2252 | |
| 2253 | void iwl_rate_control_unregister(struct ieee80211_hw *hw) |
| 2254 | { |
| 2255 | ieee80211_rate_control_unregister(&rs_ops); |
| 2256 | } |
| 2257 | |