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