drivers/staging/brcm80211/brcmsmac/wlc_rate.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18
  19 #include <proto/802.11.h>
  20 #include <bcmdefs.h>
  21 #include <osl.h>
  22 #include <bcmutils.h>
  23 #include <siutils.h>
  24 #include <wlioctl.h>
  25 #include <sbhnddma.h>
  26
  27 #include "wlc_types.h"
  28 #include "sbhndpio.h"
  29 #include "d11.h"
  30 #include "wl_dbg.h"
  31 #include "wlc_cfg.h"
  32 #include "wlc_scb.h"
  33 #include "wlc_pub.h"
  34 #include "wlc_rate.h"
  35
  36 /* Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate value */
  37 const u8 rate_info[WLC_MAXRATE + 1] = {
  38         /*  0     1     2     3     4     5     6     7     8     9 */
  39 /*   0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00,
  40 /*  10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00,
  41 /*  20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00,
  42 /*  30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00,
  43 /*  40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00,
  44 /*  50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  45 /*  60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  46 /*  70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  47 /*  80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  48 /*  90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00,
  49 /* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c
  50 };
  51
  52 /* rates are in units of Kbps */
  53 const mcs_info_t mcs_table[MCS_TABLE_SIZE] = {
  54         /* MCS  0: SS 1, MOD: BPSK,  CR 1/2 */
  55         {6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00,
  56          WLC_RATE_6M},
  57         /* MCS  1: SS 1, MOD: QPSK,  CR 1/2 */
  58         {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08,
  59          WLC_RATE_12M},
  60         /* MCS  2: SS 1, MOD: QPSK,  CR 3/4 */
  61         {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A,
  62          WLC_RATE_18M},
  63         /* MCS  3: SS 1, MOD: 16QAM, CR 1/2 */
  64         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10,
  65          WLC_RATE_24M},
  66         /* MCS  4: SS 1, MOD: 16QAM, CR 3/4 */
  67         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12,
  68          WLC_RATE_36M},
  69         /* MCS  5: SS 1, MOD: 64QAM, CR 2/3 */
  70         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19,
  71          WLC_RATE_48M},
  72         /* MCS  6: SS 1, MOD: 64QAM, CR 3/4 */
  73         {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A,
  74          WLC_RATE_54M},
  75         /* MCS  7: SS 1, MOD: 64QAM, CR 5/6 */
  76         {65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C,
  77          WLC_RATE_54M},
  78         /* MCS  8: SS 2, MOD: BPSK,  CR 1/2 */
  79         {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40,
  80          WLC_RATE_6M},
  81         /* MCS  9: SS 2, MOD: QPSK,  CR 1/2 */
  82         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48,
  83          WLC_RATE_12M},
  84         /* MCS 10: SS 2, MOD: QPSK,  CR 3/4 */
  85         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A,
  86          WLC_RATE_18M},
  87         /* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */
  88         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50,
  89          WLC_RATE_24M},
  90         /* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */
  91         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52,
  92          WLC_RATE_36M},
  93         /* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */
  94         {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59,
  95          WLC_RATE_48M},
  96         /* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */
  97         {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A,
  98          WLC_RATE_54M},
  99         /* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */
 100         {130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C,
 101          WLC_RATE_54M},
 102         /* MCS 16: SS 3, MOD: BPSK,  CR 1/2 */
 103         {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80,
 104          WLC_RATE_6M},
 105         /* MCS 17: SS 3, MOD: QPSK,  CR 1/2 */
 106         {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88,
 107          WLC_RATE_12M},
 108         /* MCS 18: SS 3, MOD: QPSK,  CR 3/4 */
 109         {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A,
 110          WLC_RATE_18M},
 111         /* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */
 112         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90,
 113          WLC_RATE_24M},
 114         /* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */
 115         {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92,
 116          WLC_RATE_36M},
 117         /* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */
 118         {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99,
 119          WLC_RATE_48M},
 120         /* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */
 121         {175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A,
 122          WLC_RATE_54M},
 123         /* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */
 124         {195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B,
 125          WLC_RATE_54M},
 126         /* MCS 24: SS 4, MOD: BPSK,  CR 1/2 */
 127         {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0,
 128          WLC_RATE_6M},
 129         /* MCS 25: SS 4, MOD: QPSK,  CR 1/2 */
 130         {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8,
 131          WLC_RATE_12M},
 132         /* MCS 26: SS 4, MOD: QPSK,  CR 3/4 */
 133         {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA,
 134          WLC_RATE_18M},
 135         /* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */
 136         {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0,
 137          WLC_RATE_24M},
 138         /* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */
 139         {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2,
 140          WLC_RATE_36M},
 141         /* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */
 142         {208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9,
 143          WLC_RATE_48M},
 144         /* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */
 145         {234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA,
 146          WLC_RATE_54M},
 147         /* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */
 148         {260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB,
 149          WLC_RATE_54M},
 150         /* MCS 32: SS 1, MOD: BPSK,  CR 1/2 */
 151         {0, 6000, 0, CEIL(6000 * 10, 9), 0x00, WLC_RATE_6M},
 152 };
 153
 154 /* phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams
 155  *   Number of spatial streams: always 1
 156  *   other fields: refer to table 78 of section 17.3.2.2 of the original .11a standard
 157  */
 158 typedef struct legacy_phycfg {
 159         u32 rate_ofdm;  /* ofdm mac rate */
 160         u8 tx_phy_ctl3; /* phy ctl byte 3, code rate, modulation type, # of streams */
 161 } legacy_phycfg_t;
 162
 163 #define LEGACY_PHYCFG_TABLE_SIZE        12      /* Number of legacy_rate_cfg entries in the table */
 164
 165 /* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */
 166 /* Eventually MIMOPHY would also be converted to this format */
 167 /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */
 168 static const legacy_phycfg_t legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = {
 169         {WLC_RATE_1M, 0x00},    /* CCK  1Mbps,  data rate  0 */
 170         {WLC_RATE_2M, 0x08},    /* CCK  2Mbps,  data rate  1 */
 171         {WLC_RATE_5M5, 0x10},   /* CCK  5.5Mbps,  data rate  2 */
 172         {WLC_RATE_11M, 0x18},   /* CCK  11Mbps,  data rate   3 */
 173         {WLC_RATE_6M, 0x00},    /* OFDM  6Mbps,  code rate 1/2, BPSK,   1 spatial stream */
 174         {WLC_RATE_9M, 0x02},    /* OFDM  9Mbps,  code rate 3/4, BPSK,   1 spatial stream */
 175         {WLC_RATE_12M, 0x08},   /* OFDM  12Mbps, code rate 1/2, QPSK,   1 spatial stream */
 176         {WLC_RATE_18M, 0x0A},   /* OFDM  18Mbps, code rate 3/4, QPSK,   1 spatial stream */
 177         {WLC_RATE_24M, 0x10},   /* OFDM  24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */
 178         {WLC_RATE_36M, 0x12},   /* OFDM  36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */
 179         {WLC_RATE_48M, 0x19},   /* OFDM  48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */
 180         {WLC_RATE_54M, 0x1A},   /* OFDM  54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */
 181 };
 182
 183 /* Hardware rates (also encodes default basic rates) */
 184
 185 const wlc_rateset_t cck_ofdm_mimo_rates = {
 186         12,
 187         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 188          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 189          0x6c},
 190         0x00,
 191         {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 192          0x00, 0x00, 0x00, 0x00}
 193 };
 194
 195 const wlc_rateset_t ofdm_mimo_rates = {
 196         8,
 197         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 198          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 199         0x00,
 200         {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 201          0x00, 0x00, 0x00, 0x00}
 202 };
 203
 204 /* Default ratesets that include MCS32 for 40BW channels */
 205 const wlc_rateset_t cck_ofdm_40bw_mimo_rates = {
 206         12,
 207         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 208          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 209          0x6c},
 210         0x00,
 211         {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 212          0x00, 0x00, 0x00, 0x00}
 213 };
 214
 215 const wlc_rateset_t ofdm_40bw_mimo_rates = {
 216         8,
 217         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 218          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 219         0x00,
 220         {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 221          0x00, 0x00, 0x00, 0x00}
 222 };
 223
 224 const wlc_rateset_t cck_ofdm_rates = {
 225         12,
 226         {                       /*    1b,   2b,   5.5b, 6,    9,    11b,  12,   18,   24,   36,   48,   54 Mbps */
 227          0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60,
 228          0x6c},
 229         0x00,
 230         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 231          0x00, 0x00, 0x00, 0x00}
 232 };
 233
 234 const wlc_rateset_t gphy_legacy_rates = {
 235         4,
 236         {                       /*    1b,   2b,   5.5b,  11b Mbps */
 237          0x82, 0x84, 0x8b, 0x96},
 238         0x00,
 239         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 240          0x00, 0x00, 0x00, 0x00}
 241 };
 242
 243 const wlc_rateset_t ofdm_rates = {
 244         8,
 245         {                       /*    6b,   9,    12b,  18,   24b,  36,   48,   54 Mbps */
 246          0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c},
 247         0x00,
 248         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 249          0x00, 0x00, 0x00, 0x00}
 250 };
 251
 252 const wlc_rateset_t cck_rates = {
 253         4,
 254         {                       /*    1b,   2b,   5.5,  11 Mbps */
 255          0x82, 0x84, 0x0b, 0x16},
 256         0x00,
 257         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 258          0x00, 0x00, 0x00, 0x00}
 259 };
 260
 261 static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate);
 262
 263 /* check if rateset is valid.
 264  * if check_brate is true, rateset without a basic rate is considered NOT valid.
 265  */
 266 static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate)
 267 {
 268         uint idx;
 269
 270         if (!rs->count)
 271                 return false;
 272
 273         if (!check_brate)
 274                 return true;
 275
 276         /* error if no basic rates */
 277         for (idx = 0; idx < rs->count; idx++) {
 278                 if (rs->rates[idx] & WLC_RATE_FLAG)
 279                         return true;
 280         }
 281         return false;
 282 }
 283
 284 void wlc_rateset_mcs_upd(wlc_rateset_t *rs, u8 txstreams)
 285 {
 286         int i;
 287         for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++)
 288                 rs->mcs[i] = 0;
 289 }
 290
 291 /* filter based on hardware rateset, and sort filtered rateset with basic bit(s) preserved,
 292  * and check if resulting rateset is valid.
 293 */
 294 bool
 295 wlc_rate_hwrs_filter_sort_validate(wlc_rateset_t *rs,
 296                                    const wlc_rateset_t *hw_rs,
 297                                    bool check_brate, u8 txstreams)
 298 {
 299         u8 rateset[WLC_MAXRATE + 1];
 300         u8 r;
 301         uint count;
 302         uint i;
 303
 304         memset(rateset, 0, sizeof(rateset));
 305         count = rs->count;
 306
 307         for (i = 0; i < count; i++) {
 308                 /* mask off "basic rate" bit, WLC_RATE_FLAG */
 309                 r = (int)rs->rates[i] & RATE_MASK;
 310                 if ((r > WLC_MAXRATE) || (rate_info[r] == 0)) {
 311                         continue;
 312                 }
 313                 rateset[r] = rs->rates[i];      /* preserve basic bit! */
 314         }
 315
 316         /* fill out the rates in order, looking at only supported rates */
 317         count = 0;
 318         for (i = 0; i < hw_rs->count; i++) {
 319                 r = hw_rs->rates[i] & RATE_MASK;
 320                 ASSERT(r <= WLC_MAXRATE);
 321                 if (rateset[r])
 322                         rs->rates[count++] = rateset[r];
 323         }
 324
 325         rs->count = count;
 326
 327         /* only set the mcs rate bit if the equivalent hw mcs bit is set */
 328         for (i = 0; i < MCSSET_LEN; i++)
 329                 rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]);
 330
 331         if (wlc_rateset_valid(rs, check_brate))
 332                 return true;
 333         else
 334                 return false;
 335 }
 336
 337 /* caluclate the rate of a rx'd frame and return it as a ratespec */
 338 ratespec_t BCMFASTPATH wlc_compute_rspec(d11rxhdr_t *rxh, u8 *plcp)
 339 {
 340         int phy_type;
 341         ratespec_t rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT;
 342
 343         phy_type =
 344             ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT);
 345
 346         if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) ||
 347             (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) {
 348                 switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) {
 349                 case PRXS0_CCK:
 350                         rspec =
 351                             CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal);
 352                         break;
 353                 case PRXS0_OFDM:
 354                         rspec =
 355                             OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)->
 356                                               rlpt[0]);
 357                         break;
 358                 case PRXS0_PREN:
 359                         rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE;
 360                         if (plcp[0] & MIMO_PLCP_40MHZ) {
 361                                 /* indicate rspec is for 40 MHz mode */
 362                                 rspec &= ~RSPEC_BW_MASK;
 363                                 rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT);
 364                         }
 365                         break;
 366                 case PRXS0_STDN:
 367                         /* fallthru */
 368                 default:
 369                         /* not supported */
 370                         ASSERT(0);
 371                         break;
 372                 }
 373                 if (PLCP3_ISSGI(plcp[3]))
 374                         rspec |= RSPEC_SHORT_GI;
 375         } else
 376             if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM))
 377                 rspec = OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)->rlpt[0]);
 378         else
 379                 rspec = CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal);
 380
 381         return rspec;
 382 }
 383
 384 /* copy rateset src to dst as-is (no masking or sorting) */
 385 void wlc_rateset_copy(const wlc_rateset_t *src, wlc_rateset_t *dst)
 386 {
 387         memcpy(dst, src, sizeof(wlc_rateset_t));
 388 }
 389
 390 /*
 391  * Copy and selectively filter one rateset to another.
 392  * 'basic_only' means only copy basic rates.
 393  * 'rates' indicates cck (11b) and ofdm rates combinations.
 394  *    - 0: cck and ofdm
 395  *    - 1: cck only
 396  *    - 2: ofdm only
 397  * 'xmask' is the copy mask (typically 0x7f or 0xff).
 398  */
 399 void
 400 wlc_rateset_filter(wlc_rateset_t *src, wlc_rateset_t *dst, bool basic_only,
 401                    u8 rates, uint xmask, bool mcsallow)
 402 {
 403         uint i;
 404         uint r;
 405         uint count;
 406
 407         count = 0;
 408         for (i = 0; i < src->count; i++) {
 409                 r = src->rates[i];
 410                 if (basic_only && !(r & WLC_RATE_FLAG))
 411                         continue;
 412                 if ((rates == WLC_RATES_CCK) && IS_OFDM((r & RATE_MASK)))
 413                         continue;
 414                 if ((rates == WLC_RATES_OFDM) && IS_CCK((r & RATE_MASK)))
 415                         continue;
 416                 dst->rates[count++] = r & xmask;
 417         }
 418         dst->count = count;
 419         dst->htphy_membership = src->htphy_membership;
 420
 421         if (mcsallow && rates != WLC_RATES_CCK)
 422                 memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN);
 423         else
 424                 wlc_rateset_mcs_clear(dst);
 425 }
 426
 427 /* select rateset for a given phy_type and bandtype and filter it, sort it
 428  * and fill rs_tgt with result
 429  */
 430 void
 431 wlc_rateset_default(wlc_rateset_t *rs_tgt, const wlc_rateset_t *rs_hw,
 432                     uint phy_type, int bandtype, bool cck_only, uint rate_mask,
 433                     bool mcsallow, u8 bw, u8 txstreams)
 434 {
 435         const wlc_rateset_t *rs_dflt;
 436         wlc_rateset_t rs_sel;
 437         if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) ||
 438             (PHYTYPE_IS(phy_type, PHY_TYPE_N)) ||
 439             (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) ||
 440             (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) {
 441                 if (BAND_5G(bandtype)) {
 442                         rs_dflt = (bw == WLC_20_MHZ ?
 443                                    &ofdm_mimo_rates : &ofdm_40bw_mimo_rates);
 444                 } else {
 445                         rs_dflt = (bw == WLC_20_MHZ ?
 446                                    &cck_ofdm_mimo_rates :
 447                                    &cck_ofdm_40bw_mimo_rates);
 448                 }
 449         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) {
 450                 rs_dflt = (BAND_5G(bandtype)) ? &ofdm_rates : &cck_ofdm_rates;
 451         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) {
 452                 rs_dflt = &ofdm_rates;
 453         } else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) {
 454                 rs_dflt = &cck_ofdm_rates;
 455         } else {
 456                 ASSERT(0);      /* should not happen */
 457                 rs_dflt = &cck_rates;   /* force cck */
 458         }
 459
 460         /* if hw rateset is not supplied, assign selected rateset to it */
 461         if (!rs_hw)
 462                 rs_hw = rs_dflt;
 463
 464         wlc_rateset_copy(rs_dflt, &rs_sel);
 465         wlc_rateset_mcs_upd(&rs_sel, txstreams);
 466         wlc_rateset_filter(&rs_sel, rs_tgt, false,
 467                            cck_only ? WLC_RATES_CCK : WLC_RATES_CCK_OFDM,
 468                            rate_mask, mcsallow);
 469         wlc_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false,
 470                                            mcsallow ? txstreams : 1);
 471 }
 472
 473 s16 BCMFASTPATH wlc_rate_legacy_phyctl(uint rate)
 474 {
 475         uint i;
 476         for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++)
 477                 if (rate == legacy_phycfg_table[i].rate_ofdm)
 478                         return legacy_phycfg_table[i].tx_phy_ctl3;
 479
 480         return -1;
 481 }
 482
 483 void wlc_rateset_mcs_clear(wlc_rateset_t *rateset)
 484 {
 485         uint i;
 486         for (i = 0; i < MCSSET_LEN; i++)
 487                 rateset->mcs[i] = 0;
 488 }
 489
 490 void wlc_rateset_mcs_build(wlc_rateset_t *rateset, u8 txstreams)
 491 {
 492         memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN);
 493         wlc_rateset_mcs_upd(rateset, txstreams);
 494 }
 495
 496 /* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */
 497 void wlc_rateset_bw_mcs_filter(wlc_rateset_t *rateset, u8 bw)
 498 {
 499         if (bw == WLC_40_MHZ)
 500                 setbit(rateset->mcs, 32);
 501         else
 502                 clrbit(rateset->mcs, 32);
 503 }