Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 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 <net/mac80211.h> |
| 17 | |
| 18 | #include "rate.h" |
| 19 | #include "scb.h" |
| 20 | #include "phy/phy_hal.h" |
| 21 | #include "antsel.h" |
| 22 | #include "main.h" |
| 23 | #include "ampdu.h" |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 24 | #include "debug.h" |
Seth Forshee | cdf4352 | 2012-11-15 08:08:09 -0600 | [diff] [blame] | 25 | #include "brcms_trace_events.h" |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 26 | |
| 27 | /* max number of mpdus in an ampdu */ |
| 28 | #define AMPDU_MAX_MPDU 32 |
| 29 | /* max number of mpdus in an ampdu to a legacy */ |
| 30 | #define AMPDU_NUM_MPDU_LEGACY 16 |
| 31 | /* max Tx ba window size (in pdu) */ |
| 32 | #define AMPDU_TX_BA_MAX_WSIZE 64 |
| 33 | /* default Tx ba window size (in pdu) */ |
| 34 | #define AMPDU_TX_BA_DEF_WSIZE 64 |
| 35 | /* default Rx ba window size (in pdu) */ |
| 36 | #define AMPDU_RX_BA_DEF_WSIZE 64 |
| 37 | /* max Rx ba window size (in pdu) */ |
| 38 | #define AMPDU_RX_BA_MAX_WSIZE 64 |
| 39 | /* max dur of tx ampdu (in msec) */ |
| 40 | #define AMPDU_MAX_DUR 5 |
| 41 | /* default tx retry limit */ |
| 42 | #define AMPDU_DEF_RETRY_LIMIT 5 |
| 43 | /* default tx retry limit at reg rate */ |
| 44 | #define AMPDU_DEF_RR_RETRY_LIMIT 2 |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 45 | /* default ffpld reserved bytes */ |
| 46 | #define AMPDU_DEF_FFPLD_RSVD 2048 |
| 47 | /* # of inis to be freed on detach */ |
| 48 | #define AMPDU_INI_FREE 10 |
| 49 | /* max # of mpdus released at a time */ |
| 50 | #define AMPDU_SCB_MAX_RELEASE 20 |
| 51 | |
| 52 | #define NUM_FFPLD_FIFO 4 /* number of fifo concerned by pre-loading */ |
| 53 | #define FFPLD_TX_MAX_UNFL 200 /* default value of the average number of ampdu |
| 54 | * without underflows |
| 55 | */ |
| 56 | #define FFPLD_MPDU_SIZE 1800 /* estimate of maximum mpdu size */ |
| 57 | #define FFPLD_MAX_MCS 23 /* we don't deal with mcs 32 */ |
| 58 | #define FFPLD_PLD_INCR 1000 /* increments in bytes */ |
| 59 | #define FFPLD_MAX_AMPDU_CNT 5000 /* maximum number of ampdu we |
| 60 | * accumulate between resets. |
| 61 | */ |
| 62 | |
| 63 | #define AMPDU_DELIMITER_LEN 4 |
| 64 | |
| 65 | /* max allowed number of mpdus in an ampdu (2 streams) */ |
| 66 | #define AMPDU_NUM_MPDU 16 |
| 67 | |
| 68 | #define TX_SEQ_TO_INDEX(seq) ((seq) % AMPDU_TX_BA_MAX_WSIZE) |
| 69 | |
| 70 | /* max possible overhead per mpdu in the ampdu; 3 is for roundup if needed */ |
| 71 | #define AMPDU_MAX_MPDU_OVERHEAD (FCS_LEN + DOT11_ICV_AES_LEN +\ |
| 72 | AMPDU_DELIMITER_LEN + 3\ |
| 73 | + DOT11_A4_HDR_LEN + DOT11_QOS_LEN + DOT11_IV_MAX_LEN) |
| 74 | |
| 75 | /* modulo add/sub, bound = 2^k */ |
| 76 | #define MODADD_POW2(x, y, bound) (((x) + (y)) & ((bound) - 1)) |
| 77 | #define MODSUB_POW2(x, y, bound) (((x) - (y)) & ((bound) - 1)) |
| 78 | |
| 79 | /* structure to hold tx fifo information and pre-loading state |
| 80 | * counters specific to tx underflows of ampdus |
| 81 | * some counters might be redundant with the ones in wlc or ampdu structures. |
| 82 | * This allows to maintain a specific state independently of |
| 83 | * how often and/or when the wlc counters are updated. |
| 84 | * |
| 85 | * ampdu_pld_size: number of bytes to be pre-loaded |
| 86 | * mcs2ampdu_table: per-mcs max # of mpdus in an ampdu |
| 87 | * prev_txfunfl: num of underflows last read from the HW macstats counter |
| 88 | * accum_txfunfl: num of underflows since we modified pld params |
| 89 | * accum_txampdu: num of tx ampdu since we modified pld params |
| 90 | * prev_txampdu: previous reading of tx ampdu |
| 91 | * dmaxferrate: estimated dma avg xfer rate in kbits/sec |
| 92 | */ |
| 93 | struct brcms_fifo_info { |
| 94 | u16 ampdu_pld_size; |
| 95 | u8 mcs2ampdu_table[FFPLD_MAX_MCS + 1]; |
| 96 | u16 prev_txfunfl; |
| 97 | u32 accum_txfunfl; |
| 98 | u32 accum_txampdu; |
| 99 | u32 prev_txampdu; |
| 100 | u32 dmaxferrate; |
| 101 | }; |
| 102 | |
| 103 | /* AMPDU module specific state |
| 104 | * |
| 105 | * wlc: pointer to main wlc structure |
| 106 | * scb_handle: scb cubby handle to retrieve data from scb |
| 107 | * ini_enable: per-tid initiator enable/disable of ampdu |
| 108 | * ba_tx_wsize: Tx ba window size (in pdu) |
| 109 | * ba_rx_wsize: Rx ba window size (in pdu) |
| 110 | * retry_limit: mpdu transmit retry limit |
| 111 | * rr_retry_limit: mpdu transmit retry limit at regular rate |
| 112 | * retry_limit_tid: per-tid mpdu transmit retry limit |
| 113 | * rr_retry_limit_tid: per-tid mpdu transmit retry limit at regular rate |
| 114 | * mpdu_density: min mpdu spacing (0-7) ==> 2^(x-1)/8 usec |
| 115 | * max_pdu: max pdus allowed in ampdu |
| 116 | * dur: max duration of an ampdu (in msec) |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 117 | * rx_factor: maximum rx ampdu factor (0-3) ==> 2^(13+x) bytes |
| 118 | * ffpld_rsvd: number of bytes to reserve for preload |
| 119 | * max_txlen: max size of ampdu per mcs, bw and sgi |
| 120 | * mfbr: enable multiple fallback rate |
| 121 | * tx_max_funl: underflows should be kept such that |
| 122 | * (tx_max_funfl*underflows) < tx frames |
| 123 | * fifo_tb: table of fifo infos |
| 124 | */ |
| 125 | struct ampdu_info { |
| 126 | struct brcms_c_info *wlc; |
| 127 | int scb_handle; |
| 128 | u8 ini_enable[AMPDU_MAX_SCB_TID]; |
| 129 | u8 ba_tx_wsize; |
| 130 | u8 ba_rx_wsize; |
| 131 | u8 retry_limit; |
| 132 | u8 rr_retry_limit; |
| 133 | u8 retry_limit_tid[AMPDU_MAX_SCB_TID]; |
| 134 | u8 rr_retry_limit_tid[AMPDU_MAX_SCB_TID]; |
| 135 | u8 mpdu_density; |
| 136 | s8 max_pdu; |
| 137 | u8 dur; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 138 | u8 rx_factor; |
| 139 | u32 ffpld_rsvd; |
| 140 | u32 max_txlen[MCS_TABLE_SIZE][2][2]; |
| 141 | bool mfbr; |
| 142 | u32 tx_max_funl; |
| 143 | struct brcms_fifo_info fifo_tb[NUM_FFPLD_FIFO]; |
| 144 | }; |
| 145 | |
| 146 | /* used for flushing ampdu packets */ |
| 147 | struct cb_del_ampdu_pars { |
| 148 | struct ieee80211_sta *sta; |
| 149 | u16 tid; |
| 150 | }; |
| 151 | |
| 152 | static void brcms_c_scb_ampdu_update_max_txlen(struct ampdu_info *ampdu, u8 dur) |
| 153 | { |
| 154 | u32 rate, mcs; |
| 155 | |
| 156 | for (mcs = 0; mcs < MCS_TABLE_SIZE; mcs++) { |
| 157 | /* rate is in Kbps; dur is in msec ==> len = (rate * dur) / 8 */ |
| 158 | /* 20MHz, No SGI */ |
| 159 | rate = mcs_2_rate(mcs, false, false); |
| 160 | ampdu->max_txlen[mcs][0][0] = (rate * dur) >> 3; |
| 161 | /* 40 MHz, No SGI */ |
| 162 | rate = mcs_2_rate(mcs, true, false); |
| 163 | ampdu->max_txlen[mcs][1][0] = (rate * dur) >> 3; |
| 164 | /* 20MHz, SGI */ |
| 165 | rate = mcs_2_rate(mcs, false, true); |
| 166 | ampdu->max_txlen[mcs][0][1] = (rate * dur) >> 3; |
| 167 | /* 40 MHz, SGI */ |
| 168 | rate = mcs_2_rate(mcs, true, true); |
| 169 | ampdu->max_txlen[mcs][1][1] = (rate * dur) >> 3; |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | static bool brcms_c_ampdu_cap(struct ampdu_info *ampdu) |
| 174 | { |
| 175 | if (BRCMS_PHY_11N_CAP(ampdu->wlc->band)) |
| 176 | return true; |
| 177 | else |
| 178 | return false; |
| 179 | } |
| 180 | |
| 181 | static int brcms_c_ampdu_set(struct ampdu_info *ampdu, bool on) |
| 182 | { |
| 183 | struct brcms_c_info *wlc = ampdu->wlc; |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 184 | struct bcma_device *core = wlc->hw->d11core; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 185 | |
| 186 | wlc->pub->_ampdu = false; |
| 187 | |
| 188 | if (on) { |
| 189 | if (!(wlc->pub->_n_enab & SUPPORT_11N)) { |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 190 | brcms_err(core, "wl%d: driver not nmode enabled\n", |
| 191 | wlc->pub->unit); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 192 | return -ENOTSUPP; |
| 193 | } |
| 194 | if (!brcms_c_ampdu_cap(ampdu)) { |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 195 | brcms_err(core, "wl%d: device not ampdu capable\n", |
| 196 | wlc->pub->unit); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 197 | return -ENOTSUPP; |
| 198 | } |
| 199 | wlc->pub->_ampdu = on; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static void brcms_c_ffpld_init(struct ampdu_info *ampdu) |
| 206 | { |
| 207 | int i, j; |
| 208 | struct brcms_fifo_info *fifo; |
| 209 | |
| 210 | for (j = 0; j < NUM_FFPLD_FIFO; j++) { |
| 211 | fifo = (ampdu->fifo_tb + j); |
| 212 | fifo->ampdu_pld_size = 0; |
| 213 | for (i = 0; i <= FFPLD_MAX_MCS; i++) |
| 214 | fifo->mcs2ampdu_table[i] = 255; |
| 215 | fifo->dmaxferrate = 0; |
| 216 | fifo->accum_txampdu = 0; |
| 217 | fifo->prev_txfunfl = 0; |
| 218 | fifo->accum_txfunfl = 0; |
| 219 | |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | struct ampdu_info *brcms_c_ampdu_attach(struct brcms_c_info *wlc) |
| 224 | { |
| 225 | struct ampdu_info *ampdu; |
| 226 | int i; |
| 227 | |
| 228 | ampdu = kzalloc(sizeof(struct ampdu_info), GFP_ATOMIC); |
| 229 | if (!ampdu) |
| 230 | return NULL; |
| 231 | |
| 232 | ampdu->wlc = wlc; |
| 233 | |
| 234 | for (i = 0; i < AMPDU_MAX_SCB_TID; i++) |
| 235 | ampdu->ini_enable[i] = true; |
| 236 | /* Disable ampdu for VO by default */ |
| 237 | ampdu->ini_enable[PRIO_8021D_VO] = false; |
| 238 | ampdu->ini_enable[PRIO_8021D_NC] = false; |
| 239 | |
| 240 | /* Disable ampdu for BK by default since not enough fifo space */ |
| 241 | ampdu->ini_enable[PRIO_8021D_NONE] = false; |
| 242 | ampdu->ini_enable[PRIO_8021D_BK] = false; |
| 243 | |
| 244 | ampdu->ba_tx_wsize = AMPDU_TX_BA_DEF_WSIZE; |
| 245 | ampdu->ba_rx_wsize = AMPDU_RX_BA_DEF_WSIZE; |
| 246 | ampdu->mpdu_density = AMPDU_DEF_MPDU_DENSITY; |
| 247 | ampdu->max_pdu = AUTO; |
| 248 | ampdu->dur = AMPDU_MAX_DUR; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 249 | |
| 250 | ampdu->ffpld_rsvd = AMPDU_DEF_FFPLD_RSVD; |
| 251 | /* |
| 252 | * bump max ampdu rcv size to 64k for all 11n |
| 253 | * devices except 4321A0 and 4321A1 |
| 254 | */ |
| 255 | if (BRCMS_ISNPHY(wlc->band) && NREV_LT(wlc->band->phyrev, 2)) |
| 256 | ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_32K; |
| 257 | else |
| 258 | ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_64K; |
| 259 | ampdu->retry_limit = AMPDU_DEF_RETRY_LIMIT; |
| 260 | ampdu->rr_retry_limit = AMPDU_DEF_RR_RETRY_LIMIT; |
| 261 | |
| 262 | for (i = 0; i < AMPDU_MAX_SCB_TID; i++) { |
| 263 | ampdu->retry_limit_tid[i] = ampdu->retry_limit; |
| 264 | ampdu->rr_retry_limit_tid[i] = ampdu->rr_retry_limit; |
| 265 | } |
| 266 | |
| 267 | brcms_c_scb_ampdu_update_max_txlen(ampdu, ampdu->dur); |
| 268 | ampdu->mfbr = false; |
| 269 | /* try to set ampdu to the default value */ |
| 270 | brcms_c_ampdu_set(ampdu, wlc->pub->_ampdu); |
| 271 | |
| 272 | ampdu->tx_max_funl = FFPLD_TX_MAX_UNFL; |
| 273 | brcms_c_ffpld_init(ampdu); |
| 274 | |
| 275 | return ampdu; |
| 276 | } |
| 277 | |
| 278 | void brcms_c_ampdu_detach(struct ampdu_info *ampdu) |
| 279 | { |
| 280 | kfree(ampdu); |
| 281 | } |
| 282 | |
| 283 | static void brcms_c_scb_ampdu_update_config(struct ampdu_info *ampdu, |
| 284 | struct scb *scb) |
| 285 | { |
| 286 | struct scb_ampdu *scb_ampdu = &scb->scb_ampdu; |
| 287 | int i; |
| 288 | |
| 289 | scb_ampdu->max_pdu = AMPDU_NUM_MPDU; |
| 290 | |
| 291 | /* go back to legacy size if some preloading is occurring */ |
| 292 | for (i = 0; i < NUM_FFPLD_FIFO; i++) { |
| 293 | if (ampdu->fifo_tb[i].ampdu_pld_size > FFPLD_PLD_INCR) |
| 294 | scb_ampdu->max_pdu = AMPDU_NUM_MPDU_LEGACY; |
| 295 | } |
| 296 | |
| 297 | /* apply user override */ |
| 298 | if (ampdu->max_pdu != AUTO) |
| 299 | scb_ampdu->max_pdu = (u8) ampdu->max_pdu; |
| 300 | |
| 301 | scb_ampdu->release = min_t(u8, scb_ampdu->max_pdu, |
| 302 | AMPDU_SCB_MAX_RELEASE); |
| 303 | |
| 304 | if (scb_ampdu->max_rx_ampdu_bytes) |
| 305 | scb_ampdu->release = min_t(u8, scb_ampdu->release, |
| 306 | scb_ampdu->max_rx_ampdu_bytes / 1600); |
| 307 | |
| 308 | scb_ampdu->release = min(scb_ampdu->release, |
| 309 | ampdu->fifo_tb[TX_AC_BE_FIFO]. |
| 310 | mcs2ampdu_table[FFPLD_MAX_MCS]); |
| 311 | } |
| 312 | |
| 313 | static void brcms_c_scb_ampdu_update_config_all(struct ampdu_info *ampdu) |
| 314 | { |
| 315 | brcms_c_scb_ampdu_update_config(ampdu, &du->wlc->pri_scb); |
| 316 | } |
| 317 | |
| 318 | static void brcms_c_ffpld_calc_mcs2ampdu_table(struct ampdu_info *ampdu, int f) |
| 319 | { |
| 320 | int i; |
| 321 | u32 phy_rate, dma_rate, tmp; |
| 322 | u8 max_mpdu; |
| 323 | struct brcms_fifo_info *fifo = (ampdu->fifo_tb + f); |
| 324 | |
| 325 | /* recompute the dma rate */ |
| 326 | /* note : we divide/multiply by 100 to avoid integer overflows */ |
| 327 | max_mpdu = min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], |
| 328 | AMPDU_NUM_MPDU_LEGACY); |
| 329 | phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); |
| 330 | dma_rate = |
| 331 | (((phy_rate / 100) * |
| 332 | (max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
| 333 | / (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
| 334 | fifo->dmaxferrate = dma_rate; |
| 335 | |
| 336 | /* fill up the mcs2ampdu table; do not recalc the last mcs */ |
| 337 | dma_rate = dma_rate >> 7; |
| 338 | for (i = 0; i < FFPLD_MAX_MCS; i++) { |
| 339 | /* shifting to keep it within integer range */ |
| 340 | phy_rate = mcs_2_rate(i, true, false) >> 7; |
| 341 | if (phy_rate > dma_rate) { |
| 342 | tmp = ((fifo->ampdu_pld_size * phy_rate) / |
| 343 | ((phy_rate - dma_rate) * FFPLD_MPDU_SIZE)) + 1; |
| 344 | tmp = min_t(u32, tmp, 255); |
| 345 | fifo->mcs2ampdu_table[i] = (u8) tmp; |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /* evaluate the dma transfer rate using the tx underflows as feedback. |
| 351 | * If necessary, increase tx fifo preloading. If not enough, |
| 352 | * decrease maximum ampdu size for each mcs till underflows stop |
| 353 | * Return 1 if pre-loading not active, -1 if not an underflow event, |
| 354 | * 0 if pre-loading module took care of the event. |
| 355 | */ |
| 356 | static int brcms_c_ffpld_check_txfunfl(struct brcms_c_info *wlc, int fid) |
| 357 | { |
| 358 | struct ampdu_info *ampdu = wlc->ampdu; |
| 359 | u32 phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); |
| 360 | u32 txunfl_ratio; |
| 361 | u8 max_mpdu; |
| 362 | u32 current_ampdu_cnt = 0; |
| 363 | u16 max_pld_size; |
| 364 | u32 new_txunfl; |
| 365 | struct brcms_fifo_info *fifo = (ampdu->fifo_tb + fid); |
| 366 | uint xmtfifo_sz; |
| 367 | u16 cur_txunfl; |
| 368 | |
| 369 | /* return if we got here for a different reason than underflows */ |
| 370 | cur_txunfl = brcms_b_read_shm(wlc->hw, |
| 371 | M_UCODE_MACSTAT + |
| 372 | offsetof(struct macstat, txfunfl[fid])); |
| 373 | new_txunfl = (u16) (cur_txunfl - fifo->prev_txfunfl); |
| 374 | if (new_txunfl == 0) { |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 375 | brcms_dbg_ht(wlc->hw->d11core, |
| 376 | "TX status FRAG set but no tx underflows\n"); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 377 | return -1; |
| 378 | } |
| 379 | fifo->prev_txfunfl = cur_txunfl; |
| 380 | |
| 381 | if (!ampdu->tx_max_funl) |
| 382 | return 1; |
| 383 | |
| 384 | /* check if fifo is big enough */ |
| 385 | if (brcms_b_xmtfifo_sz_get(wlc->hw, fid, &xmtfifo_sz)) |
| 386 | return -1; |
| 387 | |
| 388 | if ((TXFIFO_SIZE_UNIT * (u32) xmtfifo_sz) <= ampdu->ffpld_rsvd) |
| 389 | return 1; |
| 390 | |
| 391 | max_pld_size = TXFIFO_SIZE_UNIT * xmtfifo_sz - ampdu->ffpld_rsvd; |
| 392 | fifo->accum_txfunfl += new_txunfl; |
| 393 | |
| 394 | /* we need to wait for at least 10 underflows */ |
| 395 | if (fifo->accum_txfunfl < 10) |
| 396 | return 0; |
| 397 | |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 398 | brcms_dbg_ht(wlc->hw->d11core, "ampdu_count %d tx_underflows %d\n", |
| 399 | current_ampdu_cnt, fifo->accum_txfunfl); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 400 | |
| 401 | /* |
| 402 | compute the current ratio of tx unfl per ampdu. |
| 403 | When the current ampdu count becomes too |
| 404 | big while the ratio remains small, we reset |
| 405 | the current count in order to not |
| 406 | introduce too big of a latency in detecting a |
| 407 | large amount of tx underflows later. |
| 408 | */ |
| 409 | |
| 410 | txunfl_ratio = current_ampdu_cnt / fifo->accum_txfunfl; |
| 411 | |
| 412 | if (txunfl_ratio > ampdu->tx_max_funl) { |
| 413 | if (current_ampdu_cnt >= FFPLD_MAX_AMPDU_CNT) |
| 414 | fifo->accum_txfunfl = 0; |
| 415 | |
| 416 | return 0; |
| 417 | } |
| 418 | max_mpdu = min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], |
| 419 | AMPDU_NUM_MPDU_LEGACY); |
| 420 | |
| 421 | /* In case max value max_pdu is already lower than |
| 422 | the fifo depth, there is nothing more we can do. |
| 423 | */ |
| 424 | |
| 425 | if (fifo->ampdu_pld_size >= max_mpdu * FFPLD_MPDU_SIZE) { |
| 426 | fifo->accum_txfunfl = 0; |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | if (fifo->ampdu_pld_size < max_pld_size) { |
| 431 | |
| 432 | /* increment by TX_FIFO_PLD_INC bytes */ |
| 433 | fifo->ampdu_pld_size += FFPLD_PLD_INCR; |
| 434 | if (fifo->ampdu_pld_size > max_pld_size) |
| 435 | fifo->ampdu_pld_size = max_pld_size; |
| 436 | |
| 437 | /* update scb release size */ |
| 438 | brcms_c_scb_ampdu_update_config_all(ampdu); |
| 439 | |
| 440 | /* |
| 441 | * compute a new dma xfer rate for max_mpdu @ max mcs. |
| 442 | * This is the minimum dma rate that can achieve no |
| 443 | * underflow condition for the current mpdu size. |
| 444 | * |
| 445 | * note : we divide/multiply by 100 to avoid integer overflows |
| 446 | */ |
| 447 | fifo->dmaxferrate = |
| 448 | (((phy_rate / 100) * |
| 449 | (max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
| 450 | / (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
| 451 | |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 452 | brcms_dbg_ht(wlc->hw->d11core, |
| 453 | "DMA estimated transfer rate %d; " |
| 454 | "pre-load size %d\n", |
| 455 | fifo->dmaxferrate, fifo->ampdu_pld_size); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 456 | } else { |
| 457 | |
| 458 | /* decrease ampdu size */ |
| 459 | if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] > 1) { |
| 460 | if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] == 255) |
| 461 | fifo->mcs2ampdu_table[FFPLD_MAX_MCS] = |
| 462 | AMPDU_NUM_MPDU_LEGACY - 1; |
| 463 | else |
| 464 | fifo->mcs2ampdu_table[FFPLD_MAX_MCS] -= 1; |
| 465 | |
| 466 | /* recompute the table */ |
| 467 | brcms_c_ffpld_calc_mcs2ampdu_table(ampdu, fid); |
| 468 | |
| 469 | /* update scb release size */ |
| 470 | brcms_c_scb_ampdu_update_config_all(ampdu); |
| 471 | } |
| 472 | } |
| 473 | fifo->accum_txfunfl = 0; |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | void |
| 478 | brcms_c_ampdu_tx_operational(struct brcms_c_info *wlc, u8 tid, |
| 479 | u8 ba_wsize, /* negotiated ba window size (in pdu) */ |
| 480 | uint max_rx_ampdu_bytes) /* from ht_cap in beacon */ |
| 481 | { |
| 482 | struct scb_ampdu *scb_ampdu; |
| 483 | struct scb_ampdu_tid_ini *ini; |
| 484 | struct ampdu_info *ampdu = wlc->ampdu; |
| 485 | struct scb *scb = &wlc->pri_scb; |
| 486 | scb_ampdu = &scb->scb_ampdu; |
| 487 | |
| 488 | if (!ampdu->ini_enable[tid]) { |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 489 | brcms_err(wlc->hw->d11core, "%s: Rejecting tid %d\n", |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 490 | __func__, tid); |
| 491 | return; |
| 492 | } |
| 493 | |
| 494 | ini = &scb_ampdu->ini[tid]; |
| 495 | ini->tid = tid; |
| 496 | ini->scb = scb_ampdu->scb; |
| 497 | ini->ba_wsize = ba_wsize; |
| 498 | scb_ampdu->max_rx_ampdu_bytes = max_rx_ampdu_bytes; |
| 499 | } |
| 500 | |
Seth Forshee | ef2c051 | 2012-11-15 08:07:51 -0600 | [diff] [blame] | 501 | void brcms_c_ampdu_reset_session(struct brcms_ampdu_session *session, |
| 502 | struct brcms_c_info *wlc) |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 503 | { |
Seth Forshee | ef2c051 | 2012-11-15 08:07:51 -0600 | [diff] [blame] | 504 | session->wlc = wlc; |
| 505 | skb_queue_head_init(&session->skb_list); |
| 506 | session->max_ampdu_len = 0; /* determined from first MPDU */ |
| 507 | session->max_ampdu_frames = 0; /* determined from first MPDU */ |
| 508 | session->ampdu_len = 0; |
| 509 | session->dma_len = 0; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Preps the given packet for AMPDU based on the session data. If the |
| 514 | * frame cannot be accomodated in the current session, -ENOSPC is |
| 515 | * returned. |
| 516 | */ |
| 517 | int brcms_c_ampdu_add_frame(struct brcms_ampdu_session *session, |
| 518 | struct sk_buff *p) |
| 519 | { |
| 520 | struct brcms_c_info *wlc = session->wlc; |
| 521 | struct ampdu_info *ampdu = wlc->ampdu; |
| 522 | struct scb *scb = &wlc->pri_scb; |
| 523 | struct scb_ampdu *scb_ampdu = &scb->scb_ampdu; |
| 524 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(p); |
| 525 | struct ieee80211_tx_rate *txrate = tx_info->status.rates; |
| 526 | struct d11txh *txh = (struct d11txh *)p->data; |
| 527 | unsigned ampdu_frames; |
| 528 | u8 ndelim, tid; |
| 529 | u8 *plcp; |
| 530 | uint len; |
| 531 | u16 mcl; |
| 532 | bool fbr_iscck; |
| 533 | bool rr; |
| 534 | |
| 535 | ndelim = txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM]; |
| 536 | plcp = (u8 *)(txh + 1); |
| 537 | fbr_iscck = !(le16_to_cpu(txh->XtraFrameTypes) & 0x03); |
| 538 | len = fbr_iscck ? BRCMS_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) : |
| 539 | BRCMS_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
| 540 | len = roundup(len, 4) + (ndelim + 1) * AMPDU_DELIMITER_LEN; |
| 541 | |
| 542 | ampdu_frames = skb_queue_len(&session->skb_list); |
| 543 | if (ampdu_frames != 0) { |
| 544 | struct sk_buff *first; |
| 545 | |
| 546 | if (ampdu_frames + 1 > session->max_ampdu_frames || |
| 547 | session->ampdu_len + len > session->max_ampdu_len) |
| 548 | return -ENOSPC; |
| 549 | |
| 550 | /* |
| 551 | * We aren't really out of space if the new frame is of |
| 552 | * a different priority, but we want the same behaviour |
| 553 | * so return -ENOSPC anyway. |
| 554 | * |
| 555 | * XXX: The old AMPDU code did this, but is it really |
| 556 | * necessary? |
| 557 | */ |
| 558 | first = skb_peek(&session->skb_list); |
| 559 | if (p->priority != first->priority) |
| 560 | return -ENOSPC; |
| 561 | } |
| 562 | |
| 563 | /* |
| 564 | * Now that we're sure this frame can be accomodated, update the |
| 565 | * session information. |
| 566 | */ |
| 567 | session->ampdu_len += len; |
| 568 | session->dma_len += p->len; |
| 569 | |
| 570 | tid = (u8)p->priority; |
| 571 | |
| 572 | /* Handle retry limits */ |
| 573 | if (txrate[0].count <= ampdu->rr_retry_limit_tid[tid]) { |
| 574 | txrate[0].count++; |
| 575 | rr = true; |
| 576 | } else { |
| 577 | txrate[1].count++; |
| 578 | rr = false; |
| 579 | } |
| 580 | |
| 581 | if (ampdu_frames == 0) { |
| 582 | u8 plcp0, plcp3, is40, sgi, mcs; |
| 583 | uint fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; |
| 584 | struct brcms_fifo_info *f = &du->fifo_tb[fifo]; |
| 585 | |
| 586 | if (rr) { |
| 587 | plcp0 = plcp[0]; |
| 588 | plcp3 = plcp[3]; |
| 589 | } else { |
| 590 | plcp0 = txh->FragPLCPFallback[0]; |
| 591 | plcp3 = txh->FragPLCPFallback[3]; |
| 592 | |
| 593 | } |
| 594 | |
| 595 | /* Limit AMPDU size based on MCS */ |
| 596 | is40 = (plcp0 & MIMO_PLCP_40MHZ) ? 1 : 0; |
| 597 | sgi = plcp3_issgi(plcp3) ? 1 : 0; |
| 598 | mcs = plcp0 & ~MIMO_PLCP_40MHZ; |
| 599 | session->max_ampdu_len = min(scb_ampdu->max_rx_ampdu_bytes, |
| 600 | ampdu->max_txlen[mcs][is40][sgi]); |
| 601 | |
| 602 | session->max_ampdu_frames = scb_ampdu->max_pdu; |
| 603 | if (mcs_2_rate(mcs, true, false) >= f->dmaxferrate) { |
| 604 | session->max_ampdu_frames = |
| 605 | min_t(u16, f->mcs2ampdu_table[mcs], |
| 606 | session->max_ampdu_frames); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * Treat all frames as "middle" frames of AMPDU here. First and |
| 612 | * last frames must be fixed up after all MPDUs have been prepped. |
| 613 | */ |
| 614 | mcl = le16_to_cpu(txh->MacTxControlLow); |
| 615 | mcl &= ~TXC_AMPDU_MASK; |
| 616 | mcl |= (TXC_AMPDU_MIDDLE << TXC_AMPDU_SHIFT); |
| 617 | mcl &= ~(TXC_STARTMSDU | TXC_SENDRTS | TXC_SENDCTS); |
| 618 | txh->MacTxControlLow = cpu_to_le16(mcl); |
| 619 | txh->PreloadSize = 0; /* always default to 0 */ |
| 620 | |
| 621 | skb_queue_tail(&session->skb_list, p); |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | void brcms_c_ampdu_finalize(struct brcms_ampdu_session *session) |
| 627 | { |
| 628 | struct brcms_c_info *wlc = session->wlc; |
| 629 | struct ampdu_info *ampdu = wlc->ampdu; |
| 630 | struct sk_buff *first, *last; |
| 631 | struct d11txh *txh; |
| 632 | struct ieee80211_tx_info *tx_info; |
| 633 | struct ieee80211_tx_rate *txrate; |
| 634 | u8 ndelim; |
| 635 | u8 *plcp; |
| 636 | uint len; |
| 637 | uint fifo; |
| 638 | struct brcms_fifo_info *f; |
| 639 | u16 mcl; |
| 640 | bool fbr; |
| 641 | bool fbr_iscck; |
| 642 | struct ieee80211_rts *rts; |
| 643 | bool use_rts = false, use_cts = false; |
| 644 | u16 dma_len = session->dma_len; |
| 645 | u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ; |
| 646 | u32 rspec = 0, rspec_fallback = 0; |
| 647 | u32 rts_rspec = 0, rts_rspec_fallback = 0; |
| 648 | u8 plcp0, plcp3, is40, sgi, mcs; |
| 649 | u16 mch; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 650 | u8 preamble_type = BRCMS_GF_PREAMBLE; |
| 651 | u8 fbr_preamble_type = BRCMS_GF_PREAMBLE; |
| 652 | u8 rts_preamble_type = BRCMS_LONG_PREAMBLE; |
| 653 | u8 rts_fbr_preamble_type = BRCMS_LONG_PREAMBLE; |
| 654 | |
Seth Forshee | ef2c051 | 2012-11-15 08:07:51 -0600 | [diff] [blame] | 655 | if (skb_queue_empty(&session->skb_list)) |
| 656 | return; |
| 657 | |
| 658 | first = skb_peek(&session->skb_list); |
| 659 | last = skb_peek_tail(&session->skb_list); |
| 660 | |
| 661 | /* Need to fix up last MPDU first to adjust AMPDU length */ |
| 662 | txh = (struct d11txh *)last->data; |
| 663 | fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; |
| 664 | f = &du->fifo_tb[fifo]; |
| 665 | |
| 666 | mcl = le16_to_cpu(txh->MacTxControlLow); |
| 667 | mcl &= ~TXC_AMPDU_MASK; |
| 668 | mcl |= (TXC_AMPDU_LAST << TXC_AMPDU_SHIFT); |
| 669 | txh->MacTxControlLow = cpu_to_le16(mcl); |
| 670 | |
| 671 | /* remove the null delimiter after last mpdu */ |
| 672 | ndelim = txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM]; |
| 673 | txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] = 0; |
| 674 | session->ampdu_len -= ndelim * AMPDU_DELIMITER_LEN; |
| 675 | |
| 676 | /* remove the pad len from last mpdu */ |
| 677 | fbr_iscck = ((le16_to_cpu(txh->XtraFrameTypes) & 0x3) == 0); |
| 678 | len = fbr_iscck ? BRCMS_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) : |
| 679 | BRCMS_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
| 680 | session->ampdu_len -= roundup(len, 4) - len; |
| 681 | |
| 682 | /* Now fix up the first MPDU */ |
| 683 | tx_info = IEEE80211_SKB_CB(first); |
| 684 | txrate = tx_info->status.rates; |
| 685 | txh = (struct d11txh *)first->data; |
| 686 | plcp = (u8 *)(txh + 1); |
| 687 | rts = (struct ieee80211_rts *)&txh->rts_frame; |
| 688 | |
| 689 | mcl = le16_to_cpu(txh->MacTxControlLow); |
| 690 | /* If only one MPDU leave it marked as last */ |
| 691 | if (first != last) { |
| 692 | mcl &= ~TXC_AMPDU_MASK; |
| 693 | mcl |= (TXC_AMPDU_FIRST << TXC_AMPDU_SHIFT); |
| 694 | } |
| 695 | mcl |= TXC_STARTMSDU; |
| 696 | if (ieee80211_is_rts(rts->frame_control)) { |
| 697 | mcl |= TXC_SENDRTS; |
| 698 | use_rts = true; |
| 699 | } |
| 700 | if (ieee80211_is_cts(rts->frame_control)) { |
| 701 | mcl |= TXC_SENDCTS; |
| 702 | use_cts = true; |
| 703 | } |
| 704 | txh->MacTxControlLow = cpu_to_le16(mcl); |
| 705 | |
| 706 | fbr = txrate[1].count > 0; |
| 707 | if (!fbr) { |
| 708 | plcp0 = plcp[0]; |
| 709 | plcp3 = plcp[3]; |
| 710 | } else { |
| 711 | plcp0 = txh->FragPLCPFallback[0]; |
| 712 | plcp3 = txh->FragPLCPFallback[3]; |
| 713 | } |
| 714 | is40 = (plcp0 & MIMO_PLCP_40MHZ) ? 1 : 0; |
| 715 | sgi = plcp3_issgi(plcp3) ? 1 : 0; |
| 716 | mcs = plcp0 & ~MIMO_PLCP_40MHZ; |
| 717 | |
| 718 | if (is40) { |
| 719 | if (CHSPEC_SB_UPPER(wlc_phy_chanspec_get(wlc->band->pi))) |
| 720 | mimo_ctlchbw = PHY_TXC1_BW_20MHZ_UP; |
| 721 | else |
| 722 | mimo_ctlchbw = PHY_TXC1_BW_20MHZ; |
| 723 | } |
| 724 | |
| 725 | /* rebuild the rspec and rspec_fallback */ |
| 726 | rspec = RSPEC_MIMORATE; |
| 727 | rspec |= plcp[0] & ~MIMO_PLCP_40MHZ; |
| 728 | if (plcp[0] & MIMO_PLCP_40MHZ) |
| 729 | rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT); |
| 730 | |
| 731 | fbr_iscck = !(le16_to_cpu(txh->XtraFrameTypes) & 0x03); |
| 732 | if (fbr_iscck) { |
| 733 | rspec_fallback = |
| 734 | cck_rspec(cck_phy2mac_rate(txh->FragPLCPFallback[0])); |
| 735 | } else { |
| 736 | rspec_fallback = RSPEC_MIMORATE; |
| 737 | rspec_fallback |= txh->FragPLCPFallback[0] & ~MIMO_PLCP_40MHZ; |
| 738 | if (txh->FragPLCPFallback[0] & MIMO_PLCP_40MHZ) |
| 739 | rspec_fallback |= PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT; |
| 740 | } |
| 741 | |
| 742 | if (use_rts || use_cts) { |
| 743 | rts_rspec = |
| 744 | brcms_c_rspec_to_rts_rspec(wlc, rspec, |
| 745 | false, mimo_ctlchbw); |
| 746 | rts_rspec_fallback = |
| 747 | brcms_c_rspec_to_rts_rspec(wlc, rspec_fallback, |
| 748 | false, mimo_ctlchbw); |
| 749 | } |
| 750 | |
| 751 | BRCMS_SET_MIMO_PLCP_LEN(plcp, session->ampdu_len); |
| 752 | /* mark plcp to indicate ampdu */ |
| 753 | BRCMS_SET_MIMO_PLCP_AMPDU(plcp); |
| 754 | |
| 755 | /* reset the mixed mode header durations */ |
| 756 | if (txh->MModeLen) { |
| 757 | u16 mmodelen = brcms_c_calc_lsig_len(wlc, rspec, |
| 758 | session->ampdu_len); |
| 759 | txh->MModeLen = cpu_to_le16(mmodelen); |
| 760 | preamble_type = BRCMS_MM_PREAMBLE; |
| 761 | } |
| 762 | if (txh->MModeFbrLen) { |
| 763 | u16 mmfbrlen = brcms_c_calc_lsig_len(wlc, rspec_fallback, |
| 764 | session->ampdu_len); |
| 765 | txh->MModeFbrLen = cpu_to_le16(mmfbrlen); |
| 766 | fbr_preamble_type = BRCMS_MM_PREAMBLE; |
| 767 | } |
| 768 | |
| 769 | /* set the preload length */ |
| 770 | if (mcs_2_rate(mcs, true, false) >= f->dmaxferrate) { |
| 771 | dma_len = min(dma_len, f->ampdu_pld_size); |
| 772 | txh->PreloadSize = cpu_to_le16(dma_len); |
| 773 | } else { |
| 774 | txh->PreloadSize = 0; |
| 775 | } |
| 776 | |
| 777 | mch = le16_to_cpu(txh->MacTxControlHigh); |
| 778 | |
| 779 | /* update RTS dur fields */ |
| 780 | if (use_rts || use_cts) { |
| 781 | u16 durid; |
| 782 | if ((mch & TXC_PREAMBLE_RTS_MAIN_SHORT) == |
| 783 | TXC_PREAMBLE_RTS_MAIN_SHORT) |
| 784 | rts_preamble_type = BRCMS_SHORT_PREAMBLE; |
| 785 | |
| 786 | if ((mch & TXC_PREAMBLE_RTS_FB_SHORT) == |
| 787 | TXC_PREAMBLE_RTS_FB_SHORT) |
| 788 | rts_fbr_preamble_type = BRCMS_SHORT_PREAMBLE; |
| 789 | |
| 790 | durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec, |
| 791 | rspec, rts_preamble_type, |
| 792 | preamble_type, |
| 793 | session->ampdu_len, true); |
| 794 | rts->duration = cpu_to_le16(durid); |
| 795 | durid = brcms_c_compute_rtscts_dur(wlc, use_cts, |
| 796 | rts_rspec_fallback, |
| 797 | rspec_fallback, |
| 798 | rts_fbr_preamble_type, |
| 799 | fbr_preamble_type, |
| 800 | session->ampdu_len, true); |
| 801 | txh->RTSDurFallback = cpu_to_le16(durid); |
| 802 | /* set TxFesTimeNormal */ |
| 803 | txh->TxFesTimeNormal = rts->duration; |
| 804 | /* set fallback rate version of TxFesTimeNormal */ |
| 805 | txh->TxFesTimeFallback = txh->RTSDurFallback; |
| 806 | } |
| 807 | |
| 808 | /* set flag and plcp for fallback rate */ |
| 809 | if (fbr) { |
| 810 | mch |= TXC_AMPDU_FBR; |
| 811 | txh->MacTxControlHigh = cpu_to_le16(mch); |
| 812 | BRCMS_SET_MIMO_PLCP_AMPDU(plcp); |
| 813 | BRCMS_SET_MIMO_PLCP_AMPDU(txh->FragPLCPFallback); |
| 814 | } |
| 815 | |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 816 | brcms_dbg_ht(wlc->hw->d11core, "wl%d: count %d ampdu_len %d\n", |
| 817 | wlc->pub->unit, skb_queue_len(&session->skb_list), |
| 818 | session->ampdu_len); |
Seth Forshee | ef2c051 | 2012-11-15 08:07:51 -0600 | [diff] [blame] | 819 | } |
| 820 | |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 821 | static void |
| 822 | brcms_c_ampdu_rate_status(struct brcms_c_info *wlc, |
| 823 | struct ieee80211_tx_info *tx_info, |
| 824 | struct tx_status *txs, u8 mcs) |
| 825 | { |
| 826 | struct ieee80211_tx_rate *txrate = tx_info->status.rates; |
| 827 | int i; |
| 828 | |
| 829 | /* clear the rest of the rates */ |
| 830 | for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) { |
| 831 | txrate[i].idx = -1; |
| 832 | txrate[i].count = 0; |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | static void |
| 837 | brcms_c_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, struct scb *scb, |
| 838 | struct sk_buff *p, struct tx_status *txs, |
| 839 | u32 s1, u32 s2) |
| 840 | { |
| 841 | struct scb_ampdu *scb_ampdu; |
| 842 | struct brcms_c_info *wlc = ampdu->wlc; |
| 843 | struct scb_ampdu_tid_ini *ini; |
| 844 | u8 bitmap[8], queue, tid; |
| 845 | struct d11txh *txh; |
| 846 | u8 *plcp; |
| 847 | struct ieee80211_hdr *h; |
| 848 | u16 seq, start_seq = 0, bindex, index, mcl; |
| 849 | u8 mcs = 0; |
| 850 | bool ba_recd = false, ack_recd = false; |
| 851 | u8 suc_mpdu = 0, tot_mpdu = 0; |
| 852 | uint supr_status; |
| 853 | bool update_rate = true, retry = true, tx_error = false; |
| 854 | u16 mimoantsel = 0; |
| 855 | u8 antselid = 0; |
| 856 | u8 retry_limit, rr_retry_limit; |
| 857 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(p); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 858 | |
Joe Perches | 8ae7465 | 2012-01-15 00:38:38 -0800 | [diff] [blame] | 859 | #ifdef DEBUG |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 860 | u8 hole[AMPDU_MAX_MPDU]; |
| 861 | memset(hole, 0, sizeof(hole)); |
| 862 | #endif |
| 863 | |
| 864 | scb_ampdu = &scb->scb_ampdu; |
| 865 | tid = (u8) (p->priority); |
| 866 | |
| 867 | ini = &scb_ampdu->ini[tid]; |
| 868 | retry_limit = ampdu->retry_limit_tid[tid]; |
| 869 | rr_retry_limit = ampdu->rr_retry_limit_tid[tid]; |
| 870 | memset(bitmap, 0, sizeof(bitmap)); |
| 871 | queue = txs->frameid & TXFID_QUEUE_MASK; |
| 872 | supr_status = txs->status & TX_STATUS_SUPR_MASK; |
| 873 | |
| 874 | if (txs->status & TX_STATUS_ACK_RCV) { |
| 875 | if (TX_STATUS_SUPR_UF == supr_status) |
| 876 | update_rate = false; |
| 877 | |
| 878 | WARN_ON(!(txs->status & TX_STATUS_INTERMEDIATE)); |
| 879 | start_seq = txs->sequence >> SEQNUM_SHIFT; |
| 880 | bitmap[0] = (txs->status & TX_STATUS_BA_BMAP03_MASK) >> |
| 881 | TX_STATUS_BA_BMAP03_SHIFT; |
| 882 | |
| 883 | WARN_ON(s1 & TX_STATUS_INTERMEDIATE); |
| 884 | WARN_ON(!(s1 & TX_STATUS_AMPDU)); |
| 885 | |
| 886 | bitmap[0] |= |
| 887 | (s1 & TX_STATUS_BA_BMAP47_MASK) << |
| 888 | TX_STATUS_BA_BMAP47_SHIFT; |
| 889 | bitmap[1] = (s1 >> 8) & 0xff; |
| 890 | bitmap[2] = (s1 >> 16) & 0xff; |
| 891 | bitmap[3] = (s1 >> 24) & 0xff; |
| 892 | |
| 893 | bitmap[4] = s2 & 0xff; |
| 894 | bitmap[5] = (s2 >> 8) & 0xff; |
| 895 | bitmap[6] = (s2 >> 16) & 0xff; |
| 896 | bitmap[7] = (s2 >> 24) & 0xff; |
| 897 | |
| 898 | ba_recd = true; |
| 899 | } else { |
| 900 | if (supr_status) { |
| 901 | update_rate = false; |
| 902 | if (supr_status == TX_STATUS_SUPR_BADCH) { |
John Greene | 99e9494 | 2013-06-03 09:47:39 -0400 | [diff] [blame] | 903 | brcms_dbg_ht(wlc->hw->d11core, |
Arend van Spriel | 769009b | 2012-03-02 22:55:51 +0100 | [diff] [blame] | 904 | "%s: Pkt tx suppressed, illegal channel possibly %d\n", |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 905 | __func__, CHSPEC_CHANNEL( |
| 906 | wlc->default_bss->chanspec)); |
| 907 | } else { |
| 908 | if (supr_status != TX_STATUS_SUPR_FRAG) |
Seth Forshee | b353dda | 2012-11-15 08:08:03 -0600 | [diff] [blame] | 909 | brcms_err(wlc->hw->d11core, |
| 910 | "%s: supr_status 0x%x\n", |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 911 | __func__, supr_status); |
| 912 | } |
| 913 | /* no need to retry for badch; will fail again */ |
| 914 | if (supr_status == TX_STATUS_SUPR_BADCH || |
| 915 | supr_status == TX_STATUS_SUPR_EXPTIME) { |
| 916 | retry = false; |
| 917 | } else if (supr_status == TX_STATUS_SUPR_EXPTIME) { |
| 918 | /* TX underflow: |
| 919 | * try tuning pre-loading or ampdu size |
| 920 | */ |
| 921 | } else if (supr_status == TX_STATUS_SUPR_FRAG) { |
| 922 | /* |
| 923 | * if there were underflows, but pre-loading |
| 924 | * is not active, notify rate adaptation. |
| 925 | */ |
Seth Forshee | 32d0f12 | 2012-11-15 08:07:55 -0600 | [diff] [blame] | 926 | if (brcms_c_ffpld_check_txfunfl(wlc, queue) > 0) |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 927 | tx_error = true; |
| 928 | } |
| 929 | } else if (txs->phyerr) { |
| 930 | update_rate = false; |
John Greene | a76e9ff | 2013-07-15 14:33:34 -0400 | [diff] [blame] | 931 | brcms_dbg_ht(wlc->hw->d11core, |
| 932 | "%s: ampdu tx phy error (0x%x)\n", |
| 933 | __func__, txs->phyerr); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 934 | } |
| 935 | } |
| 936 | |
| 937 | /* loop through all pkts and retry if not acked */ |
| 938 | while (p) { |
| 939 | tx_info = IEEE80211_SKB_CB(p); |
| 940 | txh = (struct d11txh *) p->data; |
| 941 | mcl = le16_to_cpu(txh->MacTxControlLow); |
| 942 | plcp = (u8 *) (txh + 1); |
| 943 | h = (struct ieee80211_hdr *)(plcp + D11_PHY_HDR_LEN); |
| 944 | seq = le16_to_cpu(h->seq_ctrl) >> SEQNUM_SHIFT; |
| 945 | |
Seth Forshee | cdf4352 | 2012-11-15 08:08:09 -0600 | [diff] [blame] | 946 | trace_brcms_txdesc(&wlc->hw->d11core->dev, txh, sizeof(*txh)); |
| 947 | |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 948 | if (tot_mpdu == 0) { |
| 949 | mcs = plcp[0] & MIMO_PLCP_MCS_MASK; |
| 950 | mimoantsel = le16_to_cpu(txh->ABI_MimoAntSel); |
| 951 | } |
| 952 | |
| 953 | index = TX_SEQ_TO_INDEX(seq); |
| 954 | ack_recd = false; |
| 955 | if (ba_recd) { |
| 956 | bindex = MODSUB_POW2(seq, start_seq, SEQNUM_MAX); |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 957 | brcms_dbg_ht(wlc->hw->d11core, |
| 958 | "tid %d seq %d, start_seq %d, bindex %d set %d, index %d\n", |
| 959 | tid, seq, start_seq, bindex, |
| 960 | isset(bitmap, bindex), index); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 961 | /* if acked then clear bit and free packet */ |
| 962 | if ((bindex < AMPDU_TX_BA_MAX_WSIZE) |
| 963 | && isset(bitmap, bindex)) { |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 964 | ini->txretry[index] = 0; |
| 965 | |
| 966 | /* |
| 967 | * ampdu_ack_len: |
| 968 | * number of acked aggregated frames |
| 969 | */ |
| 970 | /* ampdu_len: number of aggregated frames */ |
| 971 | brcms_c_ampdu_rate_status(wlc, tx_info, txs, |
| 972 | mcs); |
| 973 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
| 974 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
| 975 | tx_info->status.ampdu_ack_len = |
| 976 | tx_info->status.ampdu_len = 1; |
| 977 | |
| 978 | skb_pull(p, D11_PHY_HDR_LEN); |
| 979 | skb_pull(p, D11_TXH_LEN); |
| 980 | |
| 981 | ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, |
| 982 | p); |
| 983 | ack_recd = true; |
| 984 | suc_mpdu++; |
| 985 | } |
| 986 | } |
| 987 | /* either retransmit or send bar if ack not recd */ |
| 988 | if (!ack_recd) { |
Arend van Spriel | 5e37920 | 2012-02-09 21:08:58 +0100 | [diff] [blame] | 989 | if (retry && (ini->txretry[index] < (int)retry_limit)) { |
Seth Forshee | e041f65 | 2012-11-15 08:07:56 -0600 | [diff] [blame] | 990 | int ret; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 991 | ini->txretry[index]++; |
Seth Forshee | e041f65 | 2012-11-15 08:07:56 -0600 | [diff] [blame] | 992 | ret = brcms_c_txfifo(wlc, queue, p); |
| 993 | /* |
| 994 | * We shouldn't be out of space in the DMA |
| 995 | * ring here since we're reinserting a frame |
| 996 | * that was just pulled out. |
| 997 | */ |
| 998 | WARN_ONCE(ret, "queue %d out of txds\n", queue); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 999 | } else { |
| 1000 | /* Retry timeout */ |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1001 | ieee80211_tx_info_clear_status(tx_info); |
| 1002 | tx_info->status.ampdu_ack_len = 0; |
| 1003 | tx_info->status.ampdu_len = 1; |
| 1004 | tx_info->flags |= |
| 1005 | IEEE80211_TX_STAT_AMPDU_NO_BACK; |
| 1006 | skb_pull(p, D11_PHY_HDR_LEN); |
| 1007 | skb_pull(p, D11_TXH_LEN); |
Seth Forshee | 5211fa2 | 2012-11-15 08:08:08 -0600 | [diff] [blame] | 1008 | brcms_dbg_ht(wlc->hw->d11core, |
Piotr Haber | 637ccc2 | 2013-01-02 15:22:37 +0100 | [diff] [blame] | 1009 | "BA Timeout, seq %d\n", |
| 1010 | seq); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1011 | ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, |
| 1012 | p); |
| 1013 | } |
| 1014 | } |
| 1015 | tot_mpdu++; |
| 1016 | |
| 1017 | /* break out if last packet of ampdu */ |
| 1018 | if (((mcl & TXC_AMPDU_MASK) >> TXC_AMPDU_SHIFT) == |
| 1019 | TXC_AMPDU_LAST) |
| 1020 | break; |
| 1021 | |
| 1022 | p = dma_getnexttxp(wlc->hw->di[queue], DMA_RANGE_TRANSMITTED); |
| 1023 | } |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1024 | |
| 1025 | /* update rate state */ |
| 1026 | antselid = brcms_c_antsel_antsel2id(wlc->asi, mimoantsel); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | void |
| 1030 | brcms_c_ampdu_dotxstatus(struct ampdu_info *ampdu, struct scb *scb, |
| 1031 | struct sk_buff *p, struct tx_status *txs) |
| 1032 | { |
| 1033 | struct scb_ampdu *scb_ampdu; |
| 1034 | struct brcms_c_info *wlc = ampdu->wlc; |
| 1035 | struct scb_ampdu_tid_ini *ini; |
| 1036 | u32 s1 = 0, s2 = 0; |
| 1037 | struct ieee80211_tx_info *tx_info; |
| 1038 | |
| 1039 | tx_info = IEEE80211_SKB_CB(p); |
| 1040 | |
| 1041 | /* BMAC_NOTE: For the split driver, second level txstatus comes later |
| 1042 | * So if the ACK was received then wait for the second level else just |
| 1043 | * call the first one |
| 1044 | */ |
| 1045 | if (txs->status & TX_STATUS_ACK_RCV) { |
| 1046 | u8 status_delay = 0; |
| 1047 | |
| 1048 | /* wait till the next 8 bytes of txstatus is available */ |
Arend van Spriel | 16d2812 | 2011-12-08 15:06:51 -0800 | [diff] [blame] | 1049 | s1 = bcma_read32(wlc->hw->d11core, D11REGOFFS(frmtxstatus)); |
| 1050 | while ((s1 & TXS_V) == 0) { |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1051 | udelay(1); |
| 1052 | status_delay++; |
| 1053 | if (status_delay > 10) |
| 1054 | return; /* error condition */ |
Arend van Spriel | 16d2812 | 2011-12-08 15:06:51 -0800 | [diff] [blame] | 1055 | s1 = bcma_read32(wlc->hw->d11core, |
| 1056 | D11REGOFFS(frmtxstatus)); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1057 | } |
| 1058 | |
Arend van Spriel | 16d2812 | 2011-12-08 15:06:51 -0800 | [diff] [blame] | 1059 | s2 = bcma_read32(wlc->hw->d11core, D11REGOFFS(frmtxstatus2)); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | if (scb) { |
| 1063 | scb_ampdu = &scb->scb_ampdu; |
| 1064 | ini = &scb_ampdu->ini[p->priority]; |
| 1065 | brcms_c_ampdu_dotxstatus_complete(ampdu, scb, p, txs, s1, s2); |
| 1066 | } else { |
| 1067 | /* loop through all pkts and free */ |
| 1068 | u8 queue = txs->frameid & TXFID_QUEUE_MASK; |
| 1069 | struct d11txh *txh; |
| 1070 | u16 mcl; |
| 1071 | while (p) { |
| 1072 | tx_info = IEEE80211_SKB_CB(p); |
| 1073 | txh = (struct d11txh *) p->data; |
Seth Forshee | cdf4352 | 2012-11-15 08:08:09 -0600 | [diff] [blame] | 1074 | trace_brcms_txdesc(&wlc->hw->d11core->dev, txh, |
| 1075 | sizeof(*txh)); |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1076 | mcl = le16_to_cpu(txh->MacTxControlLow); |
| 1077 | brcmu_pkt_buf_free_skb(p); |
| 1078 | /* break out if last packet of ampdu */ |
| 1079 | if (((mcl & TXC_AMPDU_MASK) >> TXC_AMPDU_SHIFT) == |
| 1080 | TXC_AMPDU_LAST) |
| 1081 | break; |
| 1082 | p = dma_getnexttxp(wlc->hw->di[queue], |
| 1083 | DMA_RANGE_TRANSMITTED); |
| 1084 | } |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | void brcms_c_ampdu_macaddr_upd(struct brcms_c_info *wlc) |
| 1089 | { |
| 1090 | char template[T_RAM_ACCESS_SZ * 2]; |
| 1091 | |
| 1092 | /* driver needs to write the ta in the template; ta is at offset 16 */ |
| 1093 | memset(template, 0, sizeof(template)); |
| 1094 | memcpy(template, wlc->pub->cur_etheraddr, ETH_ALEN); |
| 1095 | brcms_b_write_template_ram(wlc->hw, (T_BA_TPL_BASE + 16), |
| 1096 | (T_RAM_ACCESS_SZ * 2), |
| 1097 | template); |
| 1098 | } |
| 1099 | |
| 1100 | bool brcms_c_aggregatable(struct brcms_c_info *wlc, u8 tid) |
| 1101 | { |
| 1102 | return wlc->ampdu->ini_enable[tid]; |
| 1103 | } |
| 1104 | |
| 1105 | void brcms_c_ampdu_shm_upd(struct ampdu_info *ampdu) |
| 1106 | { |
| 1107 | struct brcms_c_info *wlc = ampdu->wlc; |
| 1108 | |
| 1109 | /* |
| 1110 | * Extend ucode internal watchdog timer to |
| 1111 | * match larger received frames |
| 1112 | */ |
| 1113 | if ((ampdu->rx_factor & IEEE80211_HT_AMPDU_PARM_FACTOR) == |
| 1114 | IEEE80211_HT_MAX_AMPDU_64K) { |
| 1115 | brcms_b_write_shm(wlc->hw, M_MIMO_MAXSYM, MIMO_MAXSYM_MAX); |
| 1116 | brcms_b_write_shm(wlc->hw, M_WATCHDOG_8TU, WATCHDOG_8TU_MAX); |
| 1117 | } else { |
| 1118 | brcms_b_write_shm(wlc->hw, M_MIMO_MAXSYM, MIMO_MAXSYM_DEF); |
| 1119 | brcms_b_write_shm(wlc->hw, M_WATCHDOG_8TU, WATCHDOG_8TU_DEF); |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | /* |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1124 | * callback function that helps invalidating ampdu packets in a DMA queue |
| 1125 | */ |
| 1126 | static void dma_cb_fn_ampdu(void *txi, void *arg_a) |
| 1127 | { |
| 1128 | struct ieee80211_sta *sta = arg_a; |
| 1129 | struct ieee80211_tx_info *tx_info = (struct ieee80211_tx_info *)txi; |
| 1130 | |
| 1131 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && |
Thomas Huehn | 644e8c0 | 2012-07-10 14:01:37 +0200 | [diff] [blame] | 1132 | (tx_info->rate_driver_data[0] == sta || sta == NULL)) |
| 1133 | tx_info->rate_driver_data[0] = NULL; |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | /* |
| 1137 | * When a remote party is no longer available for ampdu communication, any |
| 1138 | * pending tx ampdu packets in the driver have to be flushed. |
| 1139 | */ |
| 1140 | void brcms_c_ampdu_flush(struct brcms_c_info *wlc, |
| 1141 | struct ieee80211_sta *sta, u16 tid) |
| 1142 | { |
Arend van Spriel | 5b435de | 2011-10-05 13:19:03 +0200 | [diff] [blame] | 1143 | brcms_c_inval_dma_pkts(wlc->hw, sta, dma_cb_fn_ampdu); |
| 1144 | } |