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