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1130 lines
32 KiB
1130 lines
32 KiB
/* |
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* Copyright (c) 2010 Broadcom Corporation |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <net/mac80211.h> |
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|
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#include "rate.h" |
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#include "scb.h" |
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#include "phy/phy_hal.h" |
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#include "antsel.h" |
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#include "main.h" |
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#include "ampdu.h" |
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#include "debug.h" |
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#include "brcms_trace_events.h" |
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|
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/* max number of mpdus in an ampdu */ |
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#define AMPDU_MAX_MPDU 32 |
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/* max number of mpdus in an ampdu to a legacy */ |
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#define AMPDU_NUM_MPDU_LEGACY 16 |
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/* max Tx ba window size (in pdu) */ |
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#define AMPDU_TX_BA_MAX_WSIZE 64 |
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/* default Tx ba window size (in pdu) */ |
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#define AMPDU_TX_BA_DEF_WSIZE 64 |
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/* default Rx ba window size (in pdu) */ |
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#define AMPDU_RX_BA_DEF_WSIZE 64 |
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/* max Rx ba window size (in pdu) */ |
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#define AMPDU_RX_BA_MAX_WSIZE 64 |
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/* max dur of tx ampdu (in msec) */ |
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#define AMPDU_MAX_DUR 5 |
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/* default tx retry limit */ |
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#define AMPDU_DEF_RETRY_LIMIT 5 |
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/* default tx retry limit at reg rate */ |
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#define AMPDU_DEF_RR_RETRY_LIMIT 2 |
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/* default ffpld reserved bytes */ |
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#define AMPDU_DEF_FFPLD_RSVD 2048 |
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/* # of inis to be freed on detach */ |
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#define AMPDU_INI_FREE 10 |
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/* max # of mpdus released at a time */ |
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#define AMPDU_SCB_MAX_RELEASE 20 |
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|
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#define NUM_FFPLD_FIFO 4 /* number of fifo concerned by pre-loading */ |
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#define FFPLD_TX_MAX_UNFL 200 /* default value of the average number of ampdu |
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* without underflows |
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*/ |
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#define FFPLD_MPDU_SIZE 1800 /* estimate of maximum mpdu size */ |
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#define FFPLD_MAX_MCS 23 /* we don't deal with mcs 32 */ |
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#define FFPLD_PLD_INCR 1000 /* increments in bytes */ |
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#define FFPLD_MAX_AMPDU_CNT 5000 /* maximum number of ampdu we |
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* accumulate between resets. |
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*/ |
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|
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#define AMPDU_DELIMITER_LEN 4 |
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|
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/* max allowed number of mpdus in an ampdu (2 streams) */ |
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#define AMPDU_NUM_MPDU 16 |
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|
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#define TX_SEQ_TO_INDEX(seq) ((seq) % AMPDU_TX_BA_MAX_WSIZE) |
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/* max possible overhead per mpdu in the ampdu; 3 is for roundup if needed */ |
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#define AMPDU_MAX_MPDU_OVERHEAD (FCS_LEN + DOT11_ICV_AES_LEN +\ |
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AMPDU_DELIMITER_LEN + 3\ |
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+ DOT11_A4_HDR_LEN + DOT11_QOS_LEN + DOT11_IV_MAX_LEN) |
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|
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/* modulo add/sub, bound = 2^k */ |
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#define MODADD_POW2(x, y, bound) (((x) + (y)) & ((bound) - 1)) |
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#define MODSUB_POW2(x, y, bound) (((x) - (y)) & ((bound) - 1)) |
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|
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/* structure to hold tx fifo information and pre-loading state |
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* counters specific to tx underflows of ampdus |
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* some counters might be redundant with the ones in wlc or ampdu structures. |
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* This allows to maintain a specific state independently of |
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* how often and/or when the wlc counters are updated. |
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* |
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* ampdu_pld_size: number of bytes to be pre-loaded |
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* mcs2ampdu_table: per-mcs max # of mpdus in an ampdu |
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* prev_txfunfl: num of underflows last read from the HW macstats counter |
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* accum_txfunfl: num of underflows since we modified pld params |
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* accum_txampdu: num of tx ampdu since we modified pld params |
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* prev_txampdu: previous reading of tx ampdu |
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* dmaxferrate: estimated dma avg xfer rate in kbits/sec |
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*/ |
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struct brcms_fifo_info { |
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u16 ampdu_pld_size; |
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u8 mcs2ampdu_table[FFPLD_MAX_MCS + 1]; |
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u16 prev_txfunfl; |
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u32 accum_txfunfl; |
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u32 accum_txampdu; |
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u32 prev_txampdu; |
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u32 dmaxferrate; |
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}; |
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|
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/* AMPDU module specific state |
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* |
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* wlc: pointer to main wlc structure |
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* scb_handle: scb cubby handle to retrieve data from scb |
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* ini_enable: per-tid initiator enable/disable of ampdu |
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* ba_tx_wsize: Tx ba window size (in pdu) |
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* ba_rx_wsize: Rx ba window size (in pdu) |
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* retry_limit: mpdu transmit retry limit |
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* rr_retry_limit: mpdu transmit retry limit at regular rate |
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* retry_limit_tid: per-tid mpdu transmit retry limit |
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* rr_retry_limit_tid: per-tid mpdu transmit retry limit at regular rate |
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* mpdu_density: min mpdu spacing (0-7) ==> 2^(x-1)/8 usec |
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* max_pdu: max pdus allowed in ampdu |
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* dur: max duration of an ampdu (in msec) |
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* rx_factor: maximum rx ampdu factor (0-3) ==> 2^(13+x) bytes |
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* ffpld_rsvd: number of bytes to reserve for preload |
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* max_txlen: max size of ampdu per mcs, bw and sgi |
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* mfbr: enable multiple fallback rate |
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* tx_max_funl: underflows should be kept such that |
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* (tx_max_funfl*underflows) < tx frames |
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* fifo_tb: table of fifo infos |
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*/ |
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struct ampdu_info { |
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struct brcms_c_info *wlc; |
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int scb_handle; |
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u8 ini_enable[AMPDU_MAX_SCB_TID]; |
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u8 ba_tx_wsize; |
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u8 ba_rx_wsize; |
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u8 retry_limit; |
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u8 rr_retry_limit; |
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u8 retry_limit_tid[AMPDU_MAX_SCB_TID]; |
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u8 rr_retry_limit_tid[AMPDU_MAX_SCB_TID]; |
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u8 mpdu_density; |
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s8 max_pdu; |
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u8 dur; |
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u8 rx_factor; |
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u32 ffpld_rsvd; |
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u32 max_txlen[MCS_TABLE_SIZE][2][2]; |
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bool mfbr; |
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u32 tx_max_funl; |
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struct brcms_fifo_info fifo_tb[NUM_FFPLD_FIFO]; |
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}; |
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|
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/* used for flushing ampdu packets */ |
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struct cb_del_ampdu_pars { |
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struct ieee80211_sta *sta; |
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u16 tid; |
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}; |
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static void brcms_c_scb_ampdu_update_max_txlen(struct ampdu_info *ampdu, u8 dur) |
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{ |
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u32 rate, mcs; |
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for (mcs = 0; mcs < MCS_TABLE_SIZE; mcs++) { |
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/* rate is in Kbps; dur is in msec ==> len = (rate * dur) / 8 */ |
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/* 20MHz, No SGI */ |
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rate = mcs_2_rate(mcs, false, false); |
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ampdu->max_txlen[mcs][0][0] = (rate * dur) >> 3; |
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/* 40 MHz, No SGI */ |
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rate = mcs_2_rate(mcs, true, false); |
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ampdu->max_txlen[mcs][1][0] = (rate * dur) >> 3; |
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/* 20MHz, SGI */ |
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rate = mcs_2_rate(mcs, false, true); |
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ampdu->max_txlen[mcs][0][1] = (rate * dur) >> 3; |
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/* 40 MHz, SGI */ |
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rate = mcs_2_rate(mcs, true, true); |
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ampdu->max_txlen[mcs][1][1] = (rate * dur) >> 3; |
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} |
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} |
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static bool brcms_c_ampdu_cap(struct ampdu_info *ampdu) |
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{ |
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if (BRCMS_PHY_11N_CAP(ampdu->wlc->band)) |
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return true; |
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else |
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return false; |
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} |
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static int brcms_c_ampdu_set(struct ampdu_info *ampdu, bool on) |
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{ |
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struct brcms_c_info *wlc = ampdu->wlc; |
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struct bcma_device *core = wlc->hw->d11core; |
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wlc->pub->_ampdu = false; |
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if (on) { |
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if (!(wlc->pub->_n_enab & SUPPORT_11N)) { |
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brcms_err(core, "wl%d: driver not nmode enabled\n", |
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wlc->pub->unit); |
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return -ENOTSUPP; |
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} |
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if (!brcms_c_ampdu_cap(ampdu)) { |
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brcms_err(core, "wl%d: device not ampdu capable\n", |
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wlc->pub->unit); |
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return -ENOTSUPP; |
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} |
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wlc->pub->_ampdu = on; |
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} |
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return 0; |
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} |
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static void brcms_c_ffpld_init(struct ampdu_info *ampdu) |
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{ |
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int i, j; |
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struct brcms_fifo_info *fifo; |
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for (j = 0; j < NUM_FFPLD_FIFO; j++) { |
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fifo = (ampdu->fifo_tb + j); |
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fifo->ampdu_pld_size = 0; |
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for (i = 0; i <= FFPLD_MAX_MCS; i++) |
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fifo->mcs2ampdu_table[i] = 255; |
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fifo->dmaxferrate = 0; |
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fifo->accum_txampdu = 0; |
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fifo->prev_txfunfl = 0; |
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fifo->accum_txfunfl = 0; |
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} |
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} |
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struct ampdu_info *brcms_c_ampdu_attach(struct brcms_c_info *wlc) |
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{ |
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struct ampdu_info *ampdu; |
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int i; |
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ampdu = kzalloc(sizeof(struct ampdu_info), GFP_ATOMIC); |
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if (!ampdu) |
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return NULL; |
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ampdu->wlc = wlc; |
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for (i = 0; i < AMPDU_MAX_SCB_TID; i++) |
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ampdu->ini_enable[i] = true; |
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/* Disable ampdu for VO by default */ |
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ampdu->ini_enable[PRIO_8021D_VO] = false; |
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ampdu->ini_enable[PRIO_8021D_NC] = false; |
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/* Disable ampdu for BK by default since not enough fifo space */ |
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ampdu->ini_enable[PRIO_8021D_NONE] = false; |
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ampdu->ini_enable[PRIO_8021D_BK] = false; |
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ampdu->ba_tx_wsize = AMPDU_TX_BA_DEF_WSIZE; |
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ampdu->ba_rx_wsize = AMPDU_RX_BA_DEF_WSIZE; |
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ampdu->mpdu_density = AMPDU_DEF_MPDU_DENSITY; |
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ampdu->max_pdu = AUTO; |
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ampdu->dur = AMPDU_MAX_DUR; |
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ampdu->ffpld_rsvd = AMPDU_DEF_FFPLD_RSVD; |
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/* |
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* bump max ampdu rcv size to 64k for all 11n |
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* devices except 4321A0 and 4321A1 |
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*/ |
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if (BRCMS_ISNPHY(wlc->band) && NREV_LT(wlc->band->phyrev, 2)) |
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ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_32K; |
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else |
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ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_64K; |
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ampdu->retry_limit = AMPDU_DEF_RETRY_LIMIT; |
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ampdu->rr_retry_limit = AMPDU_DEF_RR_RETRY_LIMIT; |
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for (i = 0; i < AMPDU_MAX_SCB_TID; i++) { |
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ampdu->retry_limit_tid[i] = ampdu->retry_limit; |
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ampdu->rr_retry_limit_tid[i] = ampdu->rr_retry_limit; |
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} |
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brcms_c_scb_ampdu_update_max_txlen(ampdu, ampdu->dur); |
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ampdu->mfbr = false; |
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/* try to set ampdu to the default value */ |
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brcms_c_ampdu_set(ampdu, wlc->pub->_ampdu); |
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ampdu->tx_max_funl = FFPLD_TX_MAX_UNFL; |
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brcms_c_ffpld_init(ampdu); |
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return ampdu; |
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} |
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void brcms_c_ampdu_detach(struct ampdu_info *ampdu) |
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{ |
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kfree(ampdu); |
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} |
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static void brcms_c_scb_ampdu_update_config(struct ampdu_info *ampdu, |
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struct scb *scb) |
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{ |
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struct scb_ampdu *scb_ampdu = &scb->scb_ampdu; |
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int i; |
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scb_ampdu->max_pdu = AMPDU_NUM_MPDU; |
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/* go back to legacy size if some preloading is occurring */ |
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for (i = 0; i < NUM_FFPLD_FIFO; i++) { |
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if (ampdu->fifo_tb[i].ampdu_pld_size > FFPLD_PLD_INCR) |
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scb_ampdu->max_pdu = AMPDU_NUM_MPDU_LEGACY; |
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} |
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/* apply user override */ |
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if (ampdu->max_pdu != AUTO) |
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scb_ampdu->max_pdu = (u8) ampdu->max_pdu; |
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scb_ampdu->release = min_t(u8, scb_ampdu->max_pdu, |
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AMPDU_SCB_MAX_RELEASE); |
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if (scb_ampdu->max_rx_ampdu_bytes) |
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scb_ampdu->release = min_t(u8, scb_ampdu->release, |
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scb_ampdu->max_rx_ampdu_bytes / 1600); |
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scb_ampdu->release = min(scb_ampdu->release, |
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ampdu->fifo_tb[TX_AC_BE_FIFO]. |
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mcs2ampdu_table[FFPLD_MAX_MCS]); |
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} |
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static void brcms_c_scb_ampdu_update_config_all(struct ampdu_info *ampdu) |
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{ |
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brcms_c_scb_ampdu_update_config(ampdu, &du->wlc->pri_scb); |
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} |
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static void brcms_c_ffpld_calc_mcs2ampdu_table(struct ampdu_info *ampdu, int f) |
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{ |
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int i; |
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u32 phy_rate, dma_rate, tmp; |
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u8 max_mpdu; |
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struct brcms_fifo_info *fifo = (ampdu->fifo_tb + f); |
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|
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/* recompute the dma rate */ |
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/* note : we divide/multiply by 100 to avoid integer overflows */ |
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max_mpdu = min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], |
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AMPDU_NUM_MPDU_LEGACY); |
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phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); |
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dma_rate = |
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(((phy_rate / 100) * |
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(max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
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/ (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
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fifo->dmaxferrate = dma_rate; |
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|
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/* fill up the mcs2ampdu table; do not recalc the last mcs */ |
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dma_rate = dma_rate >> 7; |
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for (i = 0; i < FFPLD_MAX_MCS; i++) { |
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/* shifting to keep it within integer range */ |
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phy_rate = mcs_2_rate(i, true, false) >> 7; |
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if (phy_rate > dma_rate) { |
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tmp = ((fifo->ampdu_pld_size * phy_rate) / |
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((phy_rate - dma_rate) * FFPLD_MPDU_SIZE)) + 1; |
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tmp = min_t(u32, tmp, 255); |
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fifo->mcs2ampdu_table[i] = (u8) tmp; |
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} |
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} |
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} |
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|
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/* evaluate the dma transfer rate using the tx underflows as feedback. |
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* If necessary, increase tx fifo preloading. If not enough, |
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* decrease maximum ampdu size for each mcs till underflows stop |
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* Return 1 if pre-loading not active, -1 if not an underflow event, |
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* 0 if pre-loading module took care of the event. |
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*/ |
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static int brcms_c_ffpld_check_txfunfl(struct brcms_c_info *wlc, int fid) |
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{ |
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struct ampdu_info *ampdu = wlc->ampdu; |
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u32 phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); |
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u32 txunfl_ratio; |
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u8 max_mpdu; |
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u32 current_ampdu_cnt = 0; |
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u16 max_pld_size; |
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u32 new_txunfl; |
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struct brcms_fifo_info *fifo = (ampdu->fifo_tb + fid); |
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uint xmtfifo_sz; |
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u16 cur_txunfl; |
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/* return if we got here for a different reason than underflows */ |
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cur_txunfl = brcms_b_read_shm(wlc->hw, |
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M_UCODE_MACSTAT + |
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offsetof(struct macstat, txfunfl[fid])); |
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new_txunfl = (u16) (cur_txunfl - fifo->prev_txfunfl); |
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if (new_txunfl == 0) { |
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brcms_dbg_ht(wlc->hw->d11core, |
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"TX status FRAG set but no tx underflows\n"); |
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return -1; |
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} |
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fifo->prev_txfunfl = cur_txunfl; |
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|
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if (!ampdu->tx_max_funl) |
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return 1; |
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|
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/* check if fifo is big enough */ |
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if (brcms_b_xmtfifo_sz_get(wlc->hw, fid, &xmtfifo_sz)) |
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return -1; |
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if ((TXFIFO_SIZE_UNIT * (u32) xmtfifo_sz) <= ampdu->ffpld_rsvd) |
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return 1; |
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max_pld_size = TXFIFO_SIZE_UNIT * xmtfifo_sz - ampdu->ffpld_rsvd; |
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fifo->accum_txfunfl += new_txunfl; |
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|
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/* we need to wait for at least 10 underflows */ |
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if (fifo->accum_txfunfl < 10) |
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return 0; |
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brcms_dbg_ht(wlc->hw->d11core, "ampdu_count %d tx_underflows %d\n", |
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current_ampdu_cnt, fifo->accum_txfunfl); |
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|
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/* |
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compute the current ratio of tx unfl per ampdu. |
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When the current ampdu count becomes too |
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big while the ratio remains small, we reset |
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the current count in order to not |
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introduce too big of a latency in detecting a |
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large amount of tx underflows later. |
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*/ |
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txunfl_ratio = current_ampdu_cnt / fifo->accum_txfunfl; |
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|
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if (txunfl_ratio > ampdu->tx_max_funl) { |
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if (current_ampdu_cnt >= FFPLD_MAX_AMPDU_CNT) |
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fifo->accum_txfunfl = 0; |
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|
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return 0; |
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} |
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max_mpdu = min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], |
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AMPDU_NUM_MPDU_LEGACY); |
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|
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/* In case max value max_pdu is already lower than |
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the fifo depth, there is nothing more we can do. |
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*/ |
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|
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if (fifo->ampdu_pld_size >= max_mpdu * FFPLD_MPDU_SIZE) { |
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fifo->accum_txfunfl = 0; |
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return 0; |
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} |
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|
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if (fifo->ampdu_pld_size < max_pld_size) { |
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|
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/* increment by TX_FIFO_PLD_INC bytes */ |
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fifo->ampdu_pld_size += FFPLD_PLD_INCR; |
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if (fifo->ampdu_pld_size > max_pld_size) |
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fifo->ampdu_pld_size = max_pld_size; |
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|
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/* update scb release size */ |
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brcms_c_scb_ampdu_update_config_all(ampdu); |
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|
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/* |
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* compute a new dma xfer rate for max_mpdu @ max mcs. |
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* This is the minimum dma rate that can achieve no |
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* underflow condition for the current mpdu size. |
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* |
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* note : we divide/multiply by 100 to avoid integer overflows |
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*/ |
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fifo->dmaxferrate = |
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(((phy_rate / 100) * |
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(max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
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/ (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
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|
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brcms_dbg_ht(wlc->hw->d11core, |
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"DMA estimated transfer rate %d; " |
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"pre-load size %d\n", |
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fifo->dmaxferrate, fifo->ampdu_pld_size); |
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} else { |
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|
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/* decrease ampdu size */ |
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if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] > 1) { |
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if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] == 255) |
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fifo->mcs2ampdu_table[FFPLD_MAX_MCS] = |
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AMPDU_NUM_MPDU_LEGACY - 1; |
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else |
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fifo->mcs2ampdu_table[FFPLD_MAX_MCS] -= 1; |
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|
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/* recompute the table */ |
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brcms_c_ffpld_calc_mcs2ampdu_table(ampdu, fid); |
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|
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/* update scb release size */ |
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brcms_c_scb_ampdu_update_config_all(ampdu); |
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} |
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} |
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fifo->accum_txfunfl = 0; |
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return 0; |
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} |
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|
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void |
|
brcms_c_ampdu_tx_operational(struct brcms_c_info *wlc, u8 tid, |
|
u8 ba_wsize, /* negotiated ba window size (in pdu) */ |
|
uint max_rx_ampdu_bytes) /* from ht_cap in beacon */ |
|
{ |
|
struct scb_ampdu *scb_ampdu; |
|
struct scb_ampdu_tid_ini *ini; |
|
struct ampdu_info *ampdu = wlc->ampdu; |
|
struct scb *scb = &wlc->pri_scb; |
|
scb_ampdu = &scb->scb_ampdu; |
|
|
|
if (!ampdu->ini_enable[tid]) { |
|
brcms_err(wlc->hw->d11core, "%s: Rejecting tid %d\n", |
|
__func__, tid); |
|
return; |
|
} |
|
|
|
ini = &scb_ampdu->ini[tid]; |
|
ini->tid = tid; |
|
ini->scb = scb_ampdu->scb; |
|
ini->ba_wsize = ba_wsize; |
|
scb_ampdu->max_rx_ampdu_bytes = max_rx_ampdu_bytes; |
|
} |
|
|
|
void brcms_c_ampdu_reset_session(struct brcms_ampdu_session *session, |
|
struct brcms_c_info *wlc) |
|
{ |
|
session->wlc = wlc; |
|
skb_queue_head_init(&session->skb_list); |
|
session->max_ampdu_len = 0; /* determined from first MPDU */ |
|
session->max_ampdu_frames = 0; /* determined from first MPDU */ |
|
session->ampdu_len = 0; |
|
session->dma_len = 0; |
|
} |
|
|
|
/* |
|
* Preps the given packet for AMPDU based on the session data. If the |
|
* frame cannot be accomodated in the current session, -ENOSPC is |
|
* returned. |
|
*/ |
|
int brcms_c_ampdu_add_frame(struct brcms_ampdu_session *session, |
|
struct sk_buff *p) |
|
{ |
|
struct brcms_c_info *wlc = session->wlc; |
|
struct ampdu_info *ampdu = wlc->ampdu; |
|
struct scb *scb = &wlc->pri_scb; |
|
struct scb_ampdu *scb_ampdu = &scb->scb_ampdu; |
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(p); |
|
struct ieee80211_tx_rate *txrate = tx_info->status.rates; |
|
struct d11txh *txh = (struct d11txh *)p->data; |
|
unsigned ampdu_frames; |
|
u8 ndelim, tid; |
|
u8 *plcp; |
|
uint len; |
|
u16 mcl; |
|
bool fbr_iscck; |
|
bool rr; |
|
|
|
ndelim = txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM]; |
|
plcp = (u8 *)(txh + 1); |
|
fbr_iscck = !(le16_to_cpu(txh->XtraFrameTypes) & 0x03); |
|
len = fbr_iscck ? BRCMS_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) : |
|
BRCMS_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
|
len = roundup(len, 4) + (ndelim + 1) * AMPDU_DELIMITER_LEN; |
|
|
|
ampdu_frames = skb_queue_len(&session->skb_list); |
|
if (ampdu_frames != 0) { |
|
struct sk_buff *first; |
|
|
|
if (ampdu_frames + 1 > session->max_ampdu_frames || |
|
session->ampdu_len + len > session->max_ampdu_len) |
|
return -ENOSPC; |
|
|
|
/* |
|
* We aren't really out of space if the new frame is of |
|
* a different priority, but we want the same behaviour |
|
* so return -ENOSPC anyway. |
|
* |
|
* XXX: The old AMPDU code did this, but is it really |
|
* necessary? |
|
*/ |
|
first = skb_peek(&session->skb_list); |
|
if (p->priority != first->priority) |
|
return -ENOSPC; |
|
} |
|
|
|
/* |
|
* Now that we're sure this frame can be accomodated, update the |
|
* session information. |
|
*/ |
|
session->ampdu_len += len; |
|
session->dma_len += p->len; |
|
|
|
tid = (u8)p->priority; |
|
|
|
/* Handle retry limits */ |
|
if (txrate[0].count <= ampdu->rr_retry_limit_tid[tid]) { |
|
txrate[0].count++; |
|
rr = true; |
|
} else { |
|
txrate[1].count++; |
|
rr = false; |
|
} |
|
|
|
if (ampdu_frames == 0) { |
|
u8 plcp0, plcp3, is40, sgi, mcs; |
|
uint fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; |
|
struct brcms_fifo_info *f = &du->fifo_tb[fifo]; |
|
|
|
if (rr) { |
|
plcp0 = plcp[0]; |
|
plcp3 = plcp[3]; |
|
} else { |
|
plcp0 = txh->FragPLCPFallback[0]; |
|
plcp3 = txh->FragPLCPFallback[3]; |
|
|
|
} |
|
|
|
/* Limit AMPDU size based on MCS */ |
|
is40 = (plcp0 & MIMO_PLCP_40MHZ) ? 1 : 0; |
|
sgi = plcp3_issgi(plcp3) ? 1 : 0; |
|
mcs = plcp0 & ~MIMO_PLCP_40MHZ; |
|
session->max_ampdu_len = min(scb_ampdu->max_rx_ampdu_bytes, |
|
ampdu->max_txlen[mcs][is40][sgi]); |
|
|
|
session->max_ampdu_frames = scb_ampdu->max_pdu; |
|
if (mcs_2_rate(mcs, true, false) >= f->dmaxferrate) { |
|
session->max_ampdu_frames = |
|
min_t(u16, f->mcs2ampdu_table[mcs], |
|
session->max_ampdu_frames); |
|
} |
|
} |
|
|
|
/* |
|
* Treat all frames as "middle" frames of AMPDU here. First and |
|
* last frames must be fixed up after all MPDUs have been prepped. |
|
*/ |
|
mcl = le16_to_cpu(txh->MacTxControlLow); |
|
mcl &= ~TXC_AMPDU_MASK; |
|
mcl |= (TXC_AMPDU_MIDDLE << TXC_AMPDU_SHIFT); |
|
mcl &= ~(TXC_STARTMSDU | TXC_SENDRTS | TXC_SENDCTS); |
|
txh->MacTxControlLow = cpu_to_le16(mcl); |
|
txh->PreloadSize = 0; /* always default to 0 */ |
|
|
|
skb_queue_tail(&session->skb_list, p); |
|
|
|
return 0; |
|
} |
|
|
|
void brcms_c_ampdu_finalize(struct brcms_ampdu_session *session) |
|
{ |
|
struct brcms_c_info *wlc = session->wlc; |
|
struct ampdu_info *ampdu = wlc->ampdu; |
|
struct sk_buff *first, *last; |
|
struct d11txh *txh; |
|
struct ieee80211_tx_info *tx_info; |
|
struct ieee80211_tx_rate *txrate; |
|
u8 ndelim; |
|
u8 *plcp; |
|
uint len; |
|
uint fifo; |
|
struct brcms_fifo_info *f; |
|
u16 mcl; |
|
bool fbr; |
|
bool fbr_iscck; |
|
struct ieee80211_rts *rts; |
|
bool use_rts = false, use_cts = false; |
|
u16 dma_len = session->dma_len; |
|
u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ; |
|
u32 rspec = 0, rspec_fallback = 0; |
|
u32 rts_rspec = 0, rts_rspec_fallback = 0; |
|
u8 plcp0, is40, mcs; |
|
u16 mch; |
|
u8 preamble_type = BRCMS_GF_PREAMBLE; |
|
u8 fbr_preamble_type = BRCMS_GF_PREAMBLE; |
|
u8 rts_preamble_type = BRCMS_LONG_PREAMBLE; |
|
u8 rts_fbr_preamble_type = BRCMS_LONG_PREAMBLE; |
|
|
|
if (skb_queue_empty(&session->skb_list)) |
|
return; |
|
|
|
first = skb_peek(&session->skb_list); |
|
last = skb_peek_tail(&session->skb_list); |
|
|
|
/* Need to fix up last MPDU first to adjust AMPDU length */ |
|
txh = (struct d11txh *)last->data; |
|
fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; |
|
f = &du->fifo_tb[fifo]; |
|
|
|
mcl = le16_to_cpu(txh->MacTxControlLow); |
|
mcl &= ~TXC_AMPDU_MASK; |
|
mcl |= (TXC_AMPDU_LAST << TXC_AMPDU_SHIFT); |
|
txh->MacTxControlLow = cpu_to_le16(mcl); |
|
|
|
/* remove the null delimiter after last mpdu */ |
|
ndelim = txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM]; |
|
txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] = 0; |
|
session->ampdu_len -= ndelim * AMPDU_DELIMITER_LEN; |
|
|
|
/* remove the pad len from last mpdu */ |
|
fbr_iscck = ((le16_to_cpu(txh->XtraFrameTypes) & 0x3) == 0); |
|
len = fbr_iscck ? BRCMS_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) : |
|
BRCMS_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
|
session->ampdu_len -= roundup(len, 4) - len; |
|
|
|
/* Now fix up the first MPDU */ |
|
tx_info = IEEE80211_SKB_CB(first); |
|
txrate = tx_info->status.rates; |
|
txh = (struct d11txh *)first->data; |
|
plcp = (u8 *)(txh + 1); |
|
rts = (struct ieee80211_rts *)&txh->rts_frame; |
|
|
|
mcl = le16_to_cpu(txh->MacTxControlLow); |
|
/* If only one MPDU leave it marked as last */ |
|
if (first != last) { |
|
mcl &= ~TXC_AMPDU_MASK; |
|
mcl |= (TXC_AMPDU_FIRST << TXC_AMPDU_SHIFT); |
|
} |
|
mcl |= TXC_STARTMSDU; |
|
if (ieee80211_is_rts(rts->frame_control)) { |
|
mcl |= TXC_SENDRTS; |
|
use_rts = true; |
|
} |
|
if (ieee80211_is_cts(rts->frame_control)) { |
|
mcl |= TXC_SENDCTS; |
|
use_cts = true; |
|
} |
|
txh->MacTxControlLow = cpu_to_le16(mcl); |
|
|
|
fbr = txrate[1].count > 0; |
|
if (!fbr) |
|
plcp0 = plcp[0]; |
|
else |
|
plcp0 = txh->FragPLCPFallback[0]; |
|
|
|
is40 = (plcp0 & MIMO_PLCP_40MHZ) ? 1 : 0; |
|
mcs = plcp0 & ~MIMO_PLCP_40MHZ; |
|
|
|
if (is40) { |
|
if (CHSPEC_SB_UPPER(wlc_phy_chanspec_get(wlc->band->pi))) |
|
mimo_ctlchbw = PHY_TXC1_BW_20MHZ_UP; |
|
else |
|
mimo_ctlchbw = PHY_TXC1_BW_20MHZ; |
|
} |
|
|
|
/* rebuild the rspec and rspec_fallback */ |
|
rspec = RSPEC_MIMORATE; |
|
rspec |= plcp[0] & ~MIMO_PLCP_40MHZ; |
|
if (plcp[0] & MIMO_PLCP_40MHZ) |
|
rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT); |
|
|
|
fbr_iscck = !(le16_to_cpu(txh->XtraFrameTypes) & 0x03); |
|
if (fbr_iscck) { |
|
rspec_fallback = |
|
cck_rspec(cck_phy2mac_rate(txh->FragPLCPFallback[0])); |
|
} else { |
|
rspec_fallback = RSPEC_MIMORATE; |
|
rspec_fallback |= txh->FragPLCPFallback[0] & ~MIMO_PLCP_40MHZ; |
|
if (txh->FragPLCPFallback[0] & MIMO_PLCP_40MHZ) |
|
rspec_fallback |= PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT; |
|
} |
|
|
|
if (use_rts || use_cts) { |
|
rts_rspec = |
|
brcms_c_rspec_to_rts_rspec(wlc, rspec, |
|
false, mimo_ctlchbw); |
|
rts_rspec_fallback = |
|
brcms_c_rspec_to_rts_rspec(wlc, rspec_fallback, |
|
false, mimo_ctlchbw); |
|
} |
|
|
|
BRCMS_SET_MIMO_PLCP_LEN(plcp, session->ampdu_len); |
|
/* mark plcp to indicate ampdu */ |
|
BRCMS_SET_MIMO_PLCP_AMPDU(plcp); |
|
|
|
/* reset the mixed mode header durations */ |
|
if (txh->MModeLen) { |
|
u16 mmodelen = brcms_c_calc_lsig_len(wlc, rspec, |
|
session->ampdu_len); |
|
txh->MModeLen = cpu_to_le16(mmodelen); |
|
preamble_type = BRCMS_MM_PREAMBLE; |
|
} |
|
if (txh->MModeFbrLen) { |
|
u16 mmfbrlen = brcms_c_calc_lsig_len(wlc, rspec_fallback, |
|
session->ampdu_len); |
|
txh->MModeFbrLen = cpu_to_le16(mmfbrlen); |
|
fbr_preamble_type = BRCMS_MM_PREAMBLE; |
|
} |
|
|
|
/* set the preload length */ |
|
if (mcs_2_rate(mcs, true, false) >= f->dmaxferrate) { |
|
dma_len = min(dma_len, f->ampdu_pld_size); |
|
txh->PreloadSize = cpu_to_le16(dma_len); |
|
} else { |
|
txh->PreloadSize = 0; |
|
} |
|
|
|
mch = le16_to_cpu(txh->MacTxControlHigh); |
|
|
|
/* update RTS dur fields */ |
|
if (use_rts || use_cts) { |
|
u16 durid; |
|
if ((mch & TXC_PREAMBLE_RTS_MAIN_SHORT) == |
|
TXC_PREAMBLE_RTS_MAIN_SHORT) |
|
rts_preamble_type = BRCMS_SHORT_PREAMBLE; |
|
|
|
if ((mch & TXC_PREAMBLE_RTS_FB_SHORT) == |
|
TXC_PREAMBLE_RTS_FB_SHORT) |
|
rts_fbr_preamble_type = BRCMS_SHORT_PREAMBLE; |
|
|
|
durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec, |
|
rspec, rts_preamble_type, |
|
preamble_type, |
|
session->ampdu_len, true); |
|
rts->duration = cpu_to_le16(durid); |
|
durid = brcms_c_compute_rtscts_dur(wlc, use_cts, |
|
rts_rspec_fallback, |
|
rspec_fallback, |
|
rts_fbr_preamble_type, |
|
fbr_preamble_type, |
|
session->ampdu_len, true); |
|
txh->RTSDurFallback = cpu_to_le16(durid); |
|
/* set TxFesTimeNormal */ |
|
txh->TxFesTimeNormal = rts->duration; |
|
/* set fallback rate version of TxFesTimeNormal */ |
|
txh->TxFesTimeFallback = txh->RTSDurFallback; |
|
} |
|
|
|
/* set flag and plcp for fallback rate */ |
|
if (fbr) { |
|
mch |= TXC_AMPDU_FBR; |
|
txh->MacTxControlHigh = cpu_to_le16(mch); |
|
BRCMS_SET_MIMO_PLCP_AMPDU(plcp); |
|
BRCMS_SET_MIMO_PLCP_AMPDU(txh->FragPLCPFallback); |
|
} |
|
|
|
brcms_dbg_ht(wlc->hw->d11core, "wl%d: count %d ampdu_len %d\n", |
|
wlc->pub->unit, skb_queue_len(&session->skb_list), |
|
session->ampdu_len); |
|
} |
|
|
|
static void |
|
brcms_c_ampdu_rate_status(struct brcms_c_info *wlc, |
|
struct ieee80211_tx_info *tx_info, |
|
struct tx_status *txs, u8 mcs) |
|
{ |
|
struct ieee80211_tx_rate *txrate = tx_info->status.rates; |
|
int i; |
|
|
|
/* clear the rest of the rates */ |
|
for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) { |
|
txrate[i].idx = -1; |
|
txrate[i].count = 0; |
|
} |
|
} |
|
|
|
static void |
|
brcms_c_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, struct scb *scb, |
|
struct sk_buff *p, struct tx_status *txs, |
|
u32 s1, u32 s2) |
|
{ |
|
struct scb_ampdu *scb_ampdu; |
|
struct brcms_c_info *wlc = ampdu->wlc; |
|
struct scb_ampdu_tid_ini *ini; |
|
u8 bitmap[8], queue, tid; |
|
struct d11txh *txh; |
|
u8 *plcp; |
|
struct ieee80211_hdr *h; |
|
u16 seq, start_seq = 0, bindex, index, mcl; |
|
u8 mcs = 0; |
|
bool ba_recd = false, ack_recd = false; |
|
u8 suc_mpdu = 0, tot_mpdu = 0; |
|
uint supr_status; |
|
bool retry = true; |
|
u16 mimoantsel = 0; |
|
u8 retry_limit; |
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(p); |
|
|
|
#ifdef DEBUG |
|
u8 hole[AMPDU_MAX_MPDU]; |
|
memset(hole, 0, sizeof(hole)); |
|
#endif |
|
|
|
scb_ampdu = &scb->scb_ampdu; |
|
tid = (u8) (p->priority); |
|
|
|
ini = &scb_ampdu->ini[tid]; |
|
retry_limit = ampdu->retry_limit_tid[tid]; |
|
memset(bitmap, 0, sizeof(bitmap)); |
|
queue = txs->frameid & TXFID_QUEUE_MASK; |
|
supr_status = txs->status & TX_STATUS_SUPR_MASK; |
|
|
|
if (txs->status & TX_STATUS_ACK_RCV) { |
|
WARN_ON(!(txs->status & TX_STATUS_INTERMEDIATE)); |
|
start_seq = txs->sequence >> SEQNUM_SHIFT; |
|
bitmap[0] = (txs->status & TX_STATUS_BA_BMAP03_MASK) >> |
|
TX_STATUS_BA_BMAP03_SHIFT; |
|
|
|
WARN_ON(s1 & TX_STATUS_INTERMEDIATE); |
|
WARN_ON(!(s1 & TX_STATUS_AMPDU)); |
|
|
|
bitmap[0] |= |
|
(s1 & TX_STATUS_BA_BMAP47_MASK) << |
|
TX_STATUS_BA_BMAP47_SHIFT; |
|
bitmap[1] = (s1 >> 8) & 0xff; |
|
bitmap[2] = (s1 >> 16) & 0xff; |
|
bitmap[3] = (s1 >> 24) & 0xff; |
|
|
|
bitmap[4] = s2 & 0xff; |
|
bitmap[5] = (s2 >> 8) & 0xff; |
|
bitmap[6] = (s2 >> 16) & 0xff; |
|
bitmap[7] = (s2 >> 24) & 0xff; |
|
|
|
ba_recd = true; |
|
} else { |
|
if (supr_status) { |
|
if (supr_status == TX_STATUS_SUPR_BADCH) { |
|
brcms_dbg_ht(wlc->hw->d11core, |
|
"%s: Pkt tx suppressed, illegal channel possibly %d\n", |
|
__func__, CHSPEC_CHANNEL( |
|
wlc->default_bss->chanspec)); |
|
} else { |
|
if (supr_status != TX_STATUS_SUPR_FRAG) |
|
brcms_err(wlc->hw->d11core, |
|
"%s: supr_status 0x%x\n", |
|
__func__, supr_status); |
|
} |
|
/* no need to retry for badch; will fail again */ |
|
if (supr_status == TX_STATUS_SUPR_BADCH || |
|
supr_status == TX_STATUS_SUPR_EXPTIME) { |
|
retry = false; |
|
} else if (supr_status == TX_STATUS_SUPR_EXPTIME) { |
|
/* TX underflow: |
|
* try tuning pre-loading or ampdu size |
|
*/ |
|
} else if (supr_status == TX_STATUS_SUPR_FRAG) { |
|
/* |
|
* if there were underflows, but pre-loading |
|
* is not active, notify rate adaptation. |
|
*/ |
|
brcms_c_ffpld_check_txfunfl(wlc, queue); |
|
} |
|
} else if (txs->phyerr) { |
|
brcms_dbg_ht(wlc->hw->d11core, |
|
"%s: ampdu tx phy error (0x%x)\n", |
|
__func__, txs->phyerr); |
|
} |
|
} |
|
|
|
/* loop through all pkts and retry if not acked */ |
|
while (p) { |
|
tx_info = IEEE80211_SKB_CB(p); |
|
txh = (struct d11txh *) p->data; |
|
mcl = le16_to_cpu(txh->MacTxControlLow); |
|
plcp = (u8 *) (txh + 1); |
|
h = (struct ieee80211_hdr *)(plcp + D11_PHY_HDR_LEN); |
|
seq = le16_to_cpu(h->seq_ctrl) >> SEQNUM_SHIFT; |
|
|
|
trace_brcms_txdesc(&wlc->hw->d11core->dev, txh, sizeof(*txh)); |
|
|
|
if (tot_mpdu == 0) { |
|
mcs = plcp[0] & MIMO_PLCP_MCS_MASK; |
|
mimoantsel = le16_to_cpu(txh->ABI_MimoAntSel); |
|
} |
|
|
|
index = TX_SEQ_TO_INDEX(seq); |
|
ack_recd = false; |
|
if (ba_recd) { |
|
int block_acked; |
|
|
|
bindex = MODSUB_POW2(seq, start_seq, SEQNUM_MAX); |
|
if (bindex < AMPDU_TX_BA_MAX_WSIZE) |
|
block_acked = isset(bitmap, bindex); |
|
else |
|
block_acked = 0; |
|
brcms_dbg_ht(wlc->hw->d11core, |
|
"tid %d seq %d, start_seq %d, bindex %d set %d, index %d\n", |
|
tid, seq, start_seq, bindex, |
|
block_acked, index); |
|
/* if acked then clear bit and free packet */ |
|
if (block_acked) { |
|
ini->txretry[index] = 0; |
|
|
|
/* |
|
* ampdu_ack_len: |
|
* number of acked aggregated frames |
|
*/ |
|
/* ampdu_len: number of aggregated frames */ |
|
brcms_c_ampdu_rate_status(wlc, tx_info, txs, |
|
mcs); |
|
tx_info->flags |= IEEE80211_TX_STAT_ACK; |
|
tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
|
tx_info->status.ampdu_ack_len = |
|
tx_info->status.ampdu_len = 1; |
|
|
|
skb_pull(p, D11_PHY_HDR_LEN); |
|
skb_pull(p, D11_TXH_LEN); |
|
|
|
ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, |
|
p); |
|
ack_recd = true; |
|
suc_mpdu++; |
|
} |
|
} |
|
/* either retransmit or send bar if ack not recd */ |
|
if (!ack_recd) { |
|
if (retry && (ini->txretry[index] < (int)retry_limit)) { |
|
int ret; |
|
ini->txretry[index]++; |
|
ret = brcms_c_txfifo(wlc, queue, p); |
|
/* |
|
* We shouldn't be out of space in the DMA |
|
* ring here since we're reinserting a frame |
|
* that was just pulled out. |
|
*/ |
|
WARN_ONCE(ret, "queue %d out of txds\n", queue); |
|
} else { |
|
/* Retry timeout */ |
|
ieee80211_tx_info_clear_status(tx_info); |
|
tx_info->status.ampdu_ack_len = 0; |
|
tx_info->status.ampdu_len = 1; |
|
tx_info->flags |= |
|
IEEE80211_TX_STAT_AMPDU_NO_BACK; |
|
skb_pull(p, D11_PHY_HDR_LEN); |
|
skb_pull(p, D11_TXH_LEN); |
|
brcms_dbg_ht(wlc->hw->d11core, |
|
"BA Timeout, seq %d\n", |
|
seq); |
|
ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, |
|
p); |
|
} |
|
} |
|
tot_mpdu++; |
|
|
|
/* break out if last packet of ampdu */ |
|
if (((mcl & TXC_AMPDU_MASK) >> TXC_AMPDU_SHIFT) == |
|
TXC_AMPDU_LAST) |
|
break; |
|
|
|
p = dma_getnexttxp(wlc->hw->di[queue], DMA_RANGE_TRANSMITTED); |
|
} |
|
|
|
/* update rate state */ |
|
brcms_c_antsel_antsel2id(wlc->asi, mimoantsel); |
|
} |
|
|
|
void |
|
brcms_c_ampdu_dotxstatus(struct ampdu_info *ampdu, struct scb *scb, |
|
struct sk_buff *p, struct tx_status *txs) |
|
{ |
|
struct brcms_c_info *wlc = ampdu->wlc; |
|
u32 s1 = 0, s2 = 0; |
|
|
|
/* BMAC_NOTE: For the split driver, second level txstatus comes later |
|
* So if the ACK was received then wait for the second level else just |
|
* call the first one |
|
*/ |
|
if (txs->status & TX_STATUS_ACK_RCV) { |
|
u8 status_delay = 0; |
|
|
|
/* wait till the next 8 bytes of txstatus is available */ |
|
s1 = bcma_read32(wlc->hw->d11core, D11REGOFFS(frmtxstatus)); |
|
while ((s1 & TXS_V) == 0) { |
|
udelay(1); |
|
status_delay++; |
|
if (status_delay > 10) |
|
return; /* error condition */ |
|
s1 = bcma_read32(wlc->hw->d11core, |
|
D11REGOFFS(frmtxstatus)); |
|
} |
|
|
|
s2 = bcma_read32(wlc->hw->d11core, D11REGOFFS(frmtxstatus2)); |
|
} |
|
|
|
if (scb) { |
|
brcms_c_ampdu_dotxstatus_complete(ampdu, scb, p, txs, s1, s2); |
|
} else { |
|
/* loop through all pkts and free */ |
|
u8 queue = txs->frameid & TXFID_QUEUE_MASK; |
|
struct d11txh *txh; |
|
u16 mcl; |
|
while (p) { |
|
txh = (struct d11txh *) p->data; |
|
trace_brcms_txdesc(&wlc->hw->d11core->dev, txh, |
|
sizeof(*txh)); |
|
mcl = le16_to_cpu(txh->MacTxControlLow); |
|
brcmu_pkt_buf_free_skb(p); |
|
/* break out if last packet of ampdu */ |
|
if (((mcl & TXC_AMPDU_MASK) >> TXC_AMPDU_SHIFT) == |
|
TXC_AMPDU_LAST) |
|
break; |
|
p = dma_getnexttxp(wlc->hw->di[queue], |
|
DMA_RANGE_TRANSMITTED); |
|
} |
|
} |
|
} |
|
|
|
void brcms_c_ampdu_macaddr_upd(struct brcms_c_info *wlc) |
|
{ |
|
char template[T_RAM_ACCESS_SZ * 2]; |
|
|
|
/* driver needs to write the ta in the template; ta is at offset 16 */ |
|
memset(template, 0, sizeof(template)); |
|
memcpy(template, wlc->pub->cur_etheraddr, ETH_ALEN); |
|
brcms_b_write_template_ram(wlc->hw, (T_BA_TPL_BASE + 16), |
|
(T_RAM_ACCESS_SZ * 2), |
|
template); |
|
} |
|
|
|
bool brcms_c_aggregatable(struct brcms_c_info *wlc, u8 tid) |
|
{ |
|
return wlc->ampdu->ini_enable[tid]; |
|
} |
|
|
|
void brcms_c_ampdu_shm_upd(struct ampdu_info *ampdu) |
|
{ |
|
struct brcms_c_info *wlc = ampdu->wlc; |
|
|
|
/* |
|
* Extend ucode internal watchdog timer to |
|
* match larger received frames |
|
*/ |
|
if ((ampdu->rx_factor & IEEE80211_HT_AMPDU_PARM_FACTOR) == |
|
IEEE80211_HT_MAX_AMPDU_64K) { |
|
brcms_b_write_shm(wlc->hw, M_MIMO_MAXSYM, MIMO_MAXSYM_MAX); |
|
brcms_b_write_shm(wlc->hw, M_WATCHDOG_8TU, WATCHDOG_8TU_MAX); |
|
} else { |
|
brcms_b_write_shm(wlc->hw, M_MIMO_MAXSYM, MIMO_MAXSYM_DEF); |
|
brcms_b_write_shm(wlc->hw, M_WATCHDOG_8TU, WATCHDOG_8TU_DEF); |
|
} |
|
} |
|
|
|
/* |
|
* callback function that helps invalidating ampdu packets in a DMA queue |
|
*/ |
|
static void dma_cb_fn_ampdu(void *txi, void *arg_a) |
|
{ |
|
struct ieee80211_sta *sta = arg_a; |
|
struct ieee80211_tx_info *tx_info = (struct ieee80211_tx_info *)txi; |
|
|
|
if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && |
|
(tx_info->rate_driver_data[0] == sta || sta == NULL)) |
|
tx_info->rate_driver_data[0] = NULL; |
|
} |
|
|
|
/* |
|
* When a remote party is no longer available for ampdu communication, any |
|
* pending tx ampdu packets in the driver have to be flushed. |
|
*/ |
|
void brcms_c_ampdu_flush(struct brcms_c_info *wlc, |
|
struct ieee80211_sta *sta, u16 tid) |
|
{ |
|
brcms_c_inval_dma_pkts(wlc->hw, sta, dma_cb_fn_ampdu); |
|
}
|
|
|