| /* |
| * Copyright (c) 2010 Broadcom Corporation |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| #include <linux/kernel.h> |
| #include <net/mac80211.h> |
| |
| #include <bcmdefs.h> |
| #include <bcmutils.h> |
| #include <siutils.h> |
| #include <wlioctl.h> |
| #include <sbhnddma.h> |
| #include <hnddma.h> |
| #include <d11.h> |
| |
| #include "wlc_types.h" |
| #include "wlc_cfg.h" |
| #include "wlc_rate.h" |
| #include "wlc_scb.h" |
| #include "wlc_pub.h" |
| #include "wlc_key.h" |
| #include "phy/wlc_phy_hal.h" |
| #include "wlc_antsel.h" |
| #include "wl_export.h" |
| #include "wl_dbg.h" |
| #include "wlc_channel.h" |
| #include "wlc_main.h" |
| #include "wlc_ampdu.h" |
| |
| /* |
| * Disable AMPDU statistics counters for now |
| */ |
| #define WLCNTINCR(a) |
| #define WLCNTADD(a, b) |
| |
| #define AMPDU_MAX_MPDU 32 /* max number of mpdus in an ampdu */ |
| #define AMPDU_NUM_MPDU_LEGACY 16 /* max number of mpdus in an ampdu to a legacy */ |
| #define AMPDU_TX_BA_MAX_WSIZE 64 /* max Tx ba window size (in pdu) */ |
| #define AMPDU_TX_BA_DEF_WSIZE 64 /* default Tx ba window size (in pdu) */ |
| #define AMPDU_RX_BA_DEF_WSIZE 64 /* max Rx ba window size (in pdu) */ |
| #define AMPDU_RX_BA_MAX_WSIZE 64 /* default Rx ba window size (in pdu) */ |
| #define AMPDU_MAX_DUR 5 /* max dur of tx ampdu (in msec) */ |
| #define AMPDU_DEF_RETRY_LIMIT 5 /* default tx retry limit */ |
| #define AMPDU_DEF_RR_RETRY_LIMIT 2 /* default tx retry limit at reg rate */ |
| #define AMPDU_DEF_TXPKT_WEIGHT 2 /* default weight of ampdu in txfifo */ |
| #define AMPDU_DEF_FFPLD_RSVD 2048 /* default ffpld reserved bytes */ |
| #define AMPDU_INI_FREE 10 /* # of inis to be freed on detach */ |
| #define AMPDU_SCB_MAX_RELEASE 20 /* max # of mpdus released at a time */ |
| |
| #define NUM_FFPLD_FIFO 4 /* number of fifo concerned by pre-loading */ |
| #define FFPLD_TX_MAX_UNFL 200 /* default value of the average number of ampdu |
| * without underflows |
| */ |
| #define FFPLD_MPDU_SIZE 1800 /* estimate of maximum mpdu size */ |
| #define FFPLD_MAX_MCS 23 /* we don't deal with mcs 32 */ |
| #define FFPLD_PLD_INCR 1000 /* increments in bytes */ |
| #define FFPLD_MAX_AMPDU_CNT 5000 /* maximum number of ampdu we |
| * accumulate between resets. |
| */ |
| |
| #define TX_SEQ_TO_INDEX(seq) ((seq) % AMPDU_TX_BA_MAX_WSIZE) |
| |
| /* max possible overhead per mpdu in the ampdu; 3 is for roundup if needed */ |
| #define AMPDU_MAX_MPDU_OVERHEAD (FCS_LEN + DOT11_ICV_AES_LEN +\ |
| AMPDU_DELIMITER_LEN + 3\ |
| + DOT11_A4_HDR_LEN + DOT11_QOS_LEN + DOT11_IV_MAX_LEN) |
| |
| #ifdef BCMDBG |
| u32 wl_ampdu_dbg = |
| WL_AMPDU_UPDN_VAL | |
| WL_AMPDU_ERR_VAL | |
| WL_AMPDU_TX_VAL | |
| WL_AMPDU_RX_VAL | |
| WL_AMPDU_CTL_VAL | |
| WL_AMPDU_HW_VAL | WL_AMPDU_HWTXS_VAL | WL_AMPDU_HWDBG_VAL; |
| #endif |
| |
| /* structure to hold tx fifo information and pre-loading state |
| * counters specific to tx underflows of ampdus |
| * some counters might be redundant with the ones in wlc or ampdu structures. |
| * This allows to maintain a specific state independently of |
| * how often and/or when the wlc counters are updated. |
| */ |
| typedef struct wlc_fifo_info { |
| u16 ampdu_pld_size; /* number of bytes to be pre-loaded */ |
| u8 mcs2ampdu_table[FFPLD_MAX_MCS + 1]; /* per-mcs max # of mpdus in an ampdu */ |
| u16 prev_txfunfl; /* num of underflows last read from the HW macstats counter */ |
| u32 accum_txfunfl; /* num of underflows since we modified pld params */ |
| u32 accum_txampdu; /* num of tx ampdu since we modified pld params */ |
| u32 prev_txampdu; /* previous reading of tx ampdu */ |
| u32 dmaxferrate; /* estimated dma avg xfer rate in kbits/sec */ |
| } wlc_fifo_info_t; |
| |
| /* AMPDU module specific state */ |
| struct ampdu_info { |
| struct wlc_info *wlc; /* pointer to main wlc structure */ |
| int scb_handle; /* scb cubby handle to retrieve data from scb */ |
| u8 ini_enable[AMPDU_MAX_SCB_TID]; /* per-tid initiator enable/disable of ampdu */ |
| u8 ba_tx_wsize; /* Tx ba window size (in pdu) */ |
| u8 ba_rx_wsize; /* Rx ba window size (in pdu) */ |
| u8 retry_limit; /* mpdu transmit retry limit */ |
| u8 rr_retry_limit; /* mpdu transmit retry limit at regular rate */ |
| u8 retry_limit_tid[AMPDU_MAX_SCB_TID]; /* per-tid mpdu transmit retry limit */ |
| /* per-tid mpdu transmit retry limit at regular rate */ |
| u8 rr_retry_limit_tid[AMPDU_MAX_SCB_TID]; |
| u8 mpdu_density; /* min mpdu spacing (0-7) ==> 2^(x-1)/8 usec */ |
| s8 max_pdu; /* max pdus allowed in ampdu */ |
| u8 dur; /* max duration of an ampdu (in msec) */ |
| u8 txpkt_weight; /* weight of ampdu in txfifo; reduces rate lag */ |
| u8 rx_factor; /* maximum rx ampdu factor (0-3) ==> 2^(13+x) bytes */ |
| u32 ffpld_rsvd; /* number of bytes to reserve for preload */ |
| u32 max_txlen[MCS_TABLE_SIZE][2][2]; /* max size of ampdu per mcs, bw and sgi */ |
| void *ini_free[AMPDU_INI_FREE]; /* array of ini's to be freed on detach */ |
| bool mfbr; /* enable multiple fallback rate */ |
| u32 tx_max_funl; /* underflows should be kept such that |
| * (tx_max_funfl*underflows) < tx frames |
| */ |
| wlc_fifo_info_t fifo_tb[NUM_FFPLD_FIFO]; /* table of fifo infos */ |
| |
| }; |
| |
| #define AMPDU_CLEANUPFLAG_RX (0x1) |
| #define AMPDU_CLEANUPFLAG_TX (0x2) |
| |
| #define SCB_AMPDU_CUBBY(ampdu, scb) (&(scb->scb_ampdu)) |
| #define SCB_AMPDU_INI(scb_ampdu, tid) (&(scb_ampdu->ini[tid])) |
| |
| static void wlc_ffpld_init(struct ampdu_info *ampdu); |
| static int wlc_ffpld_check_txfunfl(struct wlc_info *wlc, int f); |
| static void wlc_ffpld_calc_mcs2ampdu_table(struct ampdu_info *ampdu, int f); |
| |
| static scb_ampdu_tid_ini_t *wlc_ampdu_init_tid_ini(struct ampdu_info *ampdu, |
| scb_ampdu_t *scb_ampdu, |
| u8 tid, bool override); |
| static void ampdu_cleanup_tid_ini(struct ampdu_info *ampdu, |
| scb_ampdu_t *scb_ampdu, |
| u8 tid, bool force); |
| static void ampdu_update_max_txlen(struct ampdu_info *ampdu, u8 dur); |
| static void scb_ampdu_update_config(struct ampdu_info *ampdu, struct scb *scb); |
| static void scb_ampdu_update_config_all(struct ampdu_info *ampdu); |
| |
| #define wlc_ampdu_txflowcontrol(a, b, c) do {} while (0) |
| |
| static void wlc_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, |
| struct scb *scb, |
| struct sk_buff *p, tx_status_t *txs, |
| u32 frmtxstatus, u32 frmtxstatus2); |
| static bool wlc_ampdu_cap(struct ampdu_info *ampdu); |
| static int wlc_ampdu_set(struct ampdu_info *ampdu, bool on); |
| |
| struct ampdu_info *wlc_ampdu_attach(struct wlc_info *wlc) |
| { |
| struct ampdu_info *ampdu; |
| int i; |
| |
| /* some code depends on packed structures */ |
| ASSERT(DOT11_MAXNUMFRAGS == NBITS(u16)); |
| ASSERT(ISPOWEROF2(AMPDU_TX_BA_MAX_WSIZE)); |
| ASSERT(ISPOWEROF2(AMPDU_RX_BA_MAX_WSIZE)); |
| ASSERT(wlc->pub->tunables->ampdunummpdu <= AMPDU_MAX_MPDU); |
| ASSERT(wlc->pub->tunables->ampdunummpdu > 0); |
| |
| ampdu = kzalloc(sizeof(struct ampdu_info), GFP_ATOMIC); |
| if (!ampdu) { |
| WL_ERROR("wl%d: wlc_ampdu_attach: out of mem\n", |
| wlc->pub->unit); |
| return NULL; |
| } |
| ampdu->wlc = wlc; |
| |
| for (i = 0; i < AMPDU_MAX_SCB_TID; i++) |
| ampdu->ini_enable[i] = true; |
| /* Disable ampdu for VO by default */ |
| ampdu->ini_enable[PRIO_8021D_VO] = false; |
| ampdu->ini_enable[PRIO_8021D_NC] = false; |
| |
| /* Disable ampdu for BK by default since not enough fifo space */ |
| ampdu->ini_enable[PRIO_8021D_NONE] = false; |
| ampdu->ini_enable[PRIO_8021D_BK] = false; |
| |
| ampdu->ba_tx_wsize = AMPDU_TX_BA_DEF_WSIZE; |
| ampdu->ba_rx_wsize = AMPDU_RX_BA_DEF_WSIZE; |
| ampdu->mpdu_density = AMPDU_DEF_MPDU_DENSITY; |
| ampdu->max_pdu = AUTO; |
| ampdu->dur = AMPDU_MAX_DUR; |
| ampdu->txpkt_weight = AMPDU_DEF_TXPKT_WEIGHT; |
| |
| ampdu->ffpld_rsvd = AMPDU_DEF_FFPLD_RSVD; |
| /* bump max ampdu rcv size to 64k for all 11n devices except 4321A0 and 4321A1 */ |
| if (WLCISNPHY(wlc->band) && NREV_LT(wlc->band->phyrev, 2)) |
| ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_32K; |
| else |
| ampdu->rx_factor = IEEE80211_HT_MAX_AMPDU_64K; |
| ampdu->retry_limit = AMPDU_DEF_RETRY_LIMIT; |
| ampdu->rr_retry_limit = AMPDU_DEF_RR_RETRY_LIMIT; |
| |
| for (i = 0; i < AMPDU_MAX_SCB_TID; i++) { |
| ampdu->retry_limit_tid[i] = ampdu->retry_limit; |
| ampdu->rr_retry_limit_tid[i] = ampdu->rr_retry_limit; |
| } |
| |
| ampdu_update_max_txlen(ampdu, ampdu->dur); |
| ampdu->mfbr = false; |
| /* try to set ampdu to the default value */ |
| wlc_ampdu_set(ampdu, wlc->pub->_ampdu); |
| |
| ampdu->tx_max_funl = FFPLD_TX_MAX_UNFL; |
| wlc_ffpld_init(ampdu); |
| |
| return ampdu; |
| } |
| |
| void wlc_ampdu_detach(struct ampdu_info *ampdu) |
| { |
| int i; |
| |
| if (!ampdu) |
| return; |
| |
| /* free all ini's which were to be freed on callbacks which were never called */ |
| for (i = 0; i < AMPDU_INI_FREE; i++) { |
| kfree(ampdu->ini_free[i]); |
| } |
| |
| wlc_module_unregister(ampdu->wlc->pub, "ampdu", ampdu); |
| kfree(ampdu); |
| } |
| |
| void scb_ampdu_cleanup(struct ampdu_info *ampdu, struct scb *scb) |
| { |
| scb_ampdu_t *scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| u8 tid; |
| |
| WL_AMPDU_UPDN("scb_ampdu_cleanup: enter\n"); |
| ASSERT(scb_ampdu); |
| |
| for (tid = 0; tid < AMPDU_MAX_SCB_TID; tid++) { |
| ampdu_cleanup_tid_ini(ampdu, scb_ampdu, tid, false); |
| } |
| } |
| |
| /* reset the ampdu state machine so that it can gracefully handle packets that were |
| * freed from the dma and tx queues during reinit |
| */ |
| void wlc_ampdu_reset(struct ampdu_info *ampdu) |
| { |
| WL_NONE("%s: Entering\n", __func__); |
| } |
| |
| static void scb_ampdu_update_config(struct ampdu_info *ampdu, struct scb *scb) |
| { |
| scb_ampdu_t *scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| int i; |
| |
| scb_ampdu->max_pdu = (u8) ampdu->wlc->pub->tunables->ampdunummpdu; |
| |
| /* go back to legacy size if some preloading is occurring */ |
| for (i = 0; i < NUM_FFPLD_FIFO; i++) { |
| if (ampdu->fifo_tb[i].ampdu_pld_size > FFPLD_PLD_INCR) |
| scb_ampdu->max_pdu = AMPDU_NUM_MPDU_LEGACY; |
| } |
| |
| /* apply user override */ |
| if (ampdu->max_pdu != AUTO) |
| scb_ampdu->max_pdu = (u8) ampdu->max_pdu; |
| |
| scb_ampdu->release = min_t(u8, scb_ampdu->max_pdu, AMPDU_SCB_MAX_RELEASE); |
| |
| if (scb_ampdu->max_rxlen) |
| scb_ampdu->release = |
| min_t(u8, scb_ampdu->release, scb_ampdu->max_rxlen / 1600); |
| |
| scb_ampdu->release = min(scb_ampdu->release, |
| ampdu->fifo_tb[TX_AC_BE_FIFO]. |
| mcs2ampdu_table[FFPLD_MAX_MCS]); |
| |
| ASSERT(scb_ampdu->release); |
| } |
| |
| void scb_ampdu_update_config_all(struct ampdu_info *ampdu) |
| { |
| scb_ampdu_update_config(ampdu, ampdu->wlc->pub->global_scb); |
| } |
| |
| static void wlc_ffpld_init(struct ampdu_info *ampdu) |
| { |
| int i, j; |
| wlc_fifo_info_t *fifo; |
| |
| for (j = 0; j < NUM_FFPLD_FIFO; j++) { |
| fifo = (ampdu->fifo_tb + j); |
| fifo->ampdu_pld_size = 0; |
| for (i = 0; i <= FFPLD_MAX_MCS; i++) |
| fifo->mcs2ampdu_table[i] = 255; |
| fifo->dmaxferrate = 0; |
| fifo->accum_txampdu = 0; |
| fifo->prev_txfunfl = 0; |
| fifo->accum_txfunfl = 0; |
| |
| } |
| } |
| |
| /* evaluate the dma transfer rate using the tx underflows as feedback. |
| * If necessary, increase tx fifo preloading. If not enough, |
| * decrease maximum ampdu size for each mcs till underflows stop |
| * Return 1 if pre-loading not active, -1 if not an underflow event, |
| * 0 if pre-loading module took care of the event. |
| */ |
| static int wlc_ffpld_check_txfunfl(struct wlc_info *wlc, int fid) |
| { |
| struct ampdu_info *ampdu = wlc->ampdu; |
| u32 phy_rate = MCS_RATE(FFPLD_MAX_MCS, true, false); |
| u32 txunfl_ratio; |
| u8 max_mpdu; |
| u32 current_ampdu_cnt = 0; |
| u16 max_pld_size; |
| u32 new_txunfl; |
| wlc_fifo_info_t *fifo = (ampdu->fifo_tb + fid); |
| uint xmtfifo_sz; |
| u16 cur_txunfl; |
| |
| /* return if we got here for a different reason than underflows */ |
| cur_txunfl = |
| wlc_read_shm(wlc, |
| M_UCODE_MACSTAT + offsetof(macstat_t, txfunfl[fid])); |
| new_txunfl = (u16) (cur_txunfl - fifo->prev_txfunfl); |
| if (new_txunfl == 0) { |
| WL_FFPLD("check_txunfl : TX status FRAG set but no tx underflows\n"); |
| return -1; |
| } |
| fifo->prev_txfunfl = cur_txunfl; |
| |
| if (!ampdu->tx_max_funl) |
| return 1; |
| |
| /* check if fifo is big enough */ |
| if (wlc_xmtfifo_sz_get(wlc, fid, &xmtfifo_sz)) { |
| WL_FFPLD("check_txunfl : get xmtfifo_sz failed\n"); |
| return -1; |
| } |
| |
| if ((TXFIFO_SIZE_UNIT * (u32) xmtfifo_sz) <= ampdu->ffpld_rsvd) |
| return 1; |
| |
| max_pld_size = TXFIFO_SIZE_UNIT * xmtfifo_sz - ampdu->ffpld_rsvd; |
| fifo->accum_txfunfl += new_txunfl; |
| |
| /* we need to wait for at least 10 underflows */ |
| if (fifo->accum_txfunfl < 10) |
| return 0; |
| |
| WL_FFPLD("ampdu_count %d tx_underflows %d\n", |
| current_ampdu_cnt, fifo->accum_txfunfl); |
| |
| /* |
| compute the current ratio of tx unfl per ampdu. |
| When the current ampdu count becomes too |
| big while the ratio remains small, we reset |
| the current count in order to not |
| introduce too big of a latency in detecting a |
| large amount of tx underflows later. |
| */ |
| |
| txunfl_ratio = current_ampdu_cnt / fifo->accum_txfunfl; |
| |
| if (txunfl_ratio > ampdu->tx_max_funl) { |
| if (current_ampdu_cnt >= FFPLD_MAX_AMPDU_CNT) { |
| fifo->accum_txfunfl = 0; |
| } |
| return 0; |
| } |
| max_mpdu = |
| min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], AMPDU_NUM_MPDU_LEGACY); |
| |
| /* In case max value max_pdu is already lower than |
| the fifo depth, there is nothing more we can do. |
| */ |
| |
| if (fifo->ampdu_pld_size >= max_mpdu * FFPLD_MPDU_SIZE) { |
| WL_FFPLD(("tx fifo pld : max ampdu fits in fifo\n)")); |
| fifo->accum_txfunfl = 0; |
| return 0; |
| } |
| |
| if (fifo->ampdu_pld_size < max_pld_size) { |
| |
| /* increment by TX_FIFO_PLD_INC bytes */ |
| fifo->ampdu_pld_size += FFPLD_PLD_INCR; |
| if (fifo->ampdu_pld_size > max_pld_size) |
| fifo->ampdu_pld_size = max_pld_size; |
| |
| /* update scb release size */ |
| scb_ampdu_update_config_all(ampdu); |
| |
| /* |
| compute a new dma xfer rate for max_mpdu @ max mcs. |
| This is the minimum dma rate that |
| can achieve no unferflow condition for the current mpdu size. |
| */ |
| /* note : we divide/multiply by 100 to avoid integer overflows */ |
| fifo->dmaxferrate = |
| (((phy_rate / 100) * |
| (max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
| / (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
| |
| WL_FFPLD("DMA estimated transfer rate %d; pre-load size %d\n", |
| fifo->dmaxferrate, fifo->ampdu_pld_size); |
| } else { |
| |
| /* decrease ampdu size */ |
| if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] > 1) { |
| if (fifo->mcs2ampdu_table[FFPLD_MAX_MCS] == 255) |
| fifo->mcs2ampdu_table[FFPLD_MAX_MCS] = |
| AMPDU_NUM_MPDU_LEGACY - 1; |
| else |
| fifo->mcs2ampdu_table[FFPLD_MAX_MCS] -= 1; |
| |
| /* recompute the table */ |
| wlc_ffpld_calc_mcs2ampdu_table(ampdu, fid); |
| |
| /* update scb release size */ |
| scb_ampdu_update_config_all(ampdu); |
| } |
| } |
| fifo->accum_txfunfl = 0; |
| return 0; |
| } |
| |
| static void wlc_ffpld_calc_mcs2ampdu_table(struct ampdu_info *ampdu, int f) |
| { |
| int i; |
| u32 phy_rate, dma_rate, tmp; |
| u8 max_mpdu; |
| wlc_fifo_info_t *fifo = (ampdu->fifo_tb + f); |
| |
| /* recompute the dma rate */ |
| /* note : we divide/multiply by 100 to avoid integer overflows */ |
| max_mpdu = |
| min_t(u8, fifo->mcs2ampdu_table[FFPLD_MAX_MCS], AMPDU_NUM_MPDU_LEGACY); |
| phy_rate = MCS_RATE(FFPLD_MAX_MCS, true, false); |
| dma_rate = |
| (((phy_rate / 100) * |
| (max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size)) |
| / (max_mpdu * FFPLD_MPDU_SIZE)) * 100; |
| fifo->dmaxferrate = dma_rate; |
| |
| /* fill up the mcs2ampdu table; do not recalc the last mcs */ |
| dma_rate = dma_rate >> 7; |
| for (i = 0; i < FFPLD_MAX_MCS; i++) { |
| /* shifting to keep it within integer range */ |
| phy_rate = MCS_RATE(i, true, false) >> 7; |
| if (phy_rate > dma_rate) { |
| tmp = ((fifo->ampdu_pld_size * phy_rate) / |
| ((phy_rate - dma_rate) * FFPLD_MPDU_SIZE)) + 1; |
| tmp = min_t(u32, tmp, 255); |
| fifo->mcs2ampdu_table[i] = (u8) tmp; |
| } |
| } |
| } |
| |
| static void BCMFASTPATH |
| wlc_ampdu_agg(struct ampdu_info *ampdu, struct scb *scb, struct sk_buff *p, |
| uint prec) |
| { |
| scb_ampdu_t *scb_ampdu; |
| scb_ampdu_tid_ini_t *ini; |
| u8 tid = (u8) (p->priority); |
| |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| |
| /* initialize initiator on first packet; sends addba req */ |
| ini = SCB_AMPDU_INI(scb_ampdu, tid); |
| if (ini->magic != INI_MAGIC) { |
| ini = wlc_ampdu_init_tid_ini(ampdu, scb_ampdu, tid, false); |
| } |
| return; |
| } |
| |
| int BCMFASTPATH |
| wlc_sendampdu(struct ampdu_info *ampdu, struct wlc_txq_info *qi, |
| struct sk_buff **pdu, int prec) |
| { |
| struct wlc_info *wlc; |
| struct sk_buff *p, *pkt[AMPDU_MAX_MPDU]; |
| u8 tid, ndelim; |
| int err = 0; |
| u8 preamble_type = WLC_GF_PREAMBLE; |
| u8 fbr_preamble_type = WLC_GF_PREAMBLE; |
| u8 rts_preamble_type = WLC_LONG_PREAMBLE; |
| u8 rts_fbr_preamble_type = WLC_LONG_PREAMBLE; |
| |
| bool rr = true, fbr = false; |
| uint i, count = 0, fifo, seg_cnt = 0; |
| u16 plen, len, seq = 0, mcl, mch, index, frameid, dma_len = 0; |
| u32 ampdu_len, maxlen = 0; |
| d11txh_t *txh = NULL; |
| u8 *plcp; |
| struct ieee80211_hdr *h; |
| struct scb *scb; |
| scb_ampdu_t *scb_ampdu; |
| scb_ampdu_tid_ini_t *ini; |
| u8 mcs = 0; |
| bool use_rts = false, use_cts = false; |
| ratespec_t rspec = 0, rspec_fallback = 0; |
| ratespec_t rts_rspec = 0, rts_rspec_fallback = 0; |
| u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ; |
| struct ieee80211_rts *rts; |
| u8 rr_retry_limit; |
| wlc_fifo_info_t *f; |
| bool fbr_iscck; |
| struct ieee80211_tx_info *tx_info; |
| u16 qlen; |
| |
| wlc = ampdu->wlc; |
| p = *pdu; |
| |
| ASSERT(p); |
| |
| tid = (u8) (p->priority); |
| ASSERT(tid < AMPDU_MAX_SCB_TID); |
| |
| f = ampdu->fifo_tb + prio2fifo[tid]; |
| |
| scb = wlc->pub->global_scb; |
| ASSERT(scb->magic == SCB_MAGIC); |
| |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| ASSERT(scb_ampdu); |
| ini = &scb_ampdu->ini[tid]; |
| |
| /* Let pressure continue to build ... */ |
| qlen = pktq_plen(&qi->q, prec); |
| if (ini->tx_in_transit > 0 && qlen < scb_ampdu->max_pdu) { |
| return BCME_BUSY; |
| } |
| |
| wlc_ampdu_agg(ampdu, scb, p, tid); |
| |
| if (wlc->block_datafifo) { |
| WL_ERROR("%s: Fifo blocked\n", __func__); |
| return BCME_BUSY; |
| } |
| rr_retry_limit = ampdu->rr_retry_limit_tid[tid]; |
| ampdu_len = 0; |
| dma_len = 0; |
| while (p) { |
| struct ieee80211_tx_rate *txrate; |
| |
| tx_info = IEEE80211_SKB_CB(p); |
| txrate = tx_info->status.rates; |
| |
| if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
| err = wlc_prep_pdu(wlc, p, &fifo); |
| } else { |
| WL_ERROR("%s: AMPDU flag is off!\n", __func__); |
| *pdu = NULL; |
| err = 0; |
| break; |
| } |
| |
| if (err) { |
| if (err == BCME_BUSY) { |
| WL_ERROR("wl%d: wlc_sendampdu: prep_xdu retry; seq 0x%x\n", |
| wlc->pub->unit, seq); |
| WLCNTINCR(ampdu->cnt->sduretry); |
| *pdu = p; |
| break; |
| } |
| |
| /* error in the packet; reject it */ |
| WL_AMPDU_ERR("wl%d: wlc_sendampdu: prep_xdu rejected; seq 0x%x\n", |
| wlc->pub->unit, seq); |
| WLCNTINCR(ampdu->cnt->sdurejected); |
| |
| *pdu = NULL; |
| break; |
| } |
| |
| /* pkt is good to be aggregated */ |
| ASSERT(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| txh = (d11txh_t *) p->data; |
| plcp = (u8 *) (txh + 1); |
| h = (struct ieee80211_hdr *)(plcp + D11_PHY_HDR_LEN); |
| seq = le16_to_cpu(h->seq_ctrl) >> SEQNUM_SHIFT; |
| index = TX_SEQ_TO_INDEX(seq); |
| |
| /* check mcl fields and test whether it can be agg'd */ |
| mcl = le16_to_cpu(txh->MacTxControlLow); |
| mcl &= ~TXC_AMPDU_MASK; |
| fbr_iscck = !(le16_to_cpu(txh->XtraFrameTypes) & 0x3); |
| ASSERT(!fbr_iscck); |
| txh->PreloadSize = 0; /* always default to 0 */ |
| |
| /* Handle retry limits */ |
| if (txrate[0].count <= rr_retry_limit) { |
| txrate[0].count++; |
| rr = true; |
| fbr = false; |
| ASSERT(!fbr); |
| } else { |
| fbr = true; |
| rr = false; |
| txrate[1].count++; |
| } |
| |
| /* extract the length info */ |
| len = fbr_iscck ? WLC_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) |
| : WLC_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
| |
| /* retrieve null delimiter count */ |
| ndelim = txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM]; |
| seg_cnt += 1; |
| |
| WL_AMPDU_TX("wl%d: wlc_sendampdu: mpdu %d plcp_len %d\n", |
| wlc->pub->unit, count, len); |
| |
| /* |
| * aggregateable mpdu. For ucode/hw agg, |
| * test whether need to break or change the epoch |
| */ |
| if (count == 0) { |
| mcl |= (TXC_AMPDU_FIRST << TXC_AMPDU_SHIFT); |
| /* refill the bits since might be a retx mpdu */ |
| mcl |= TXC_STARTMSDU; |
| rts = (struct ieee80211_rts *)&txh->rts_frame; |
| |
| 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; |
| } |
| } else { |
| mcl |= (TXC_AMPDU_MIDDLE << TXC_AMPDU_SHIFT); |
| mcl &= ~(TXC_STARTMSDU | TXC_SENDRTS | TXC_SENDCTS); |
| } |
| |
| len = roundup(len, 4); |
| ampdu_len += (len + (ndelim + 1) * AMPDU_DELIMITER_LEN); |
| |
| dma_len += (u16) pkttotlen(p); |
| |
| WL_AMPDU_TX("wl%d: wlc_sendampdu: ampdu_len %d seg_cnt %d null delim %d\n", |
| wlc->pub->unit, ampdu_len, seg_cnt, ndelim); |
| |
| txh->MacTxControlLow = cpu_to_le16(mcl); |
| |
| /* this packet is added */ |
| pkt[count++] = p; |
| |
| /* patch the first MPDU */ |
| if (count == 1) { |
| u8 plcp0, plcp3, is40, sgi; |
| struct ieee80211_sta *sta; |
| |
| sta = tx_info->control.sta; |
| |
| if (rr) { |
| plcp0 = plcp[0]; |
| plcp3 = plcp[3]; |
| } else { |
| plcp0 = txh->FragPLCPFallback[0]; |
| plcp3 = txh->FragPLCPFallback[3]; |
| |
| } |
| is40 = (plcp0 & MIMO_PLCP_40MHZ) ? 1 : 0; |
| sgi = PLCP3_ISSGI(plcp3) ? 1 : 0; |
| mcs = plcp0 & ~MIMO_PLCP_40MHZ; |
| ASSERT(mcs < MCS_TABLE_SIZE); |
| maxlen = |
| min(scb_ampdu->max_rxlen, |
| ampdu->max_txlen[mcs][is40][sgi]); |
| |
| WL_NONE("sendampdu: sgi %d, is40 %d, mcs %d\n", |
| sgi, is40, mcs); |
| |
| maxlen = 64 * 1024; /* XXX Fix me to honor real max_rxlen */ |
| |
| if (is40) |
| mimo_ctlchbw = |
| CHSPEC_SB_UPPER(WLC_BAND_PI_RADIO_CHANSPEC) |
| ? PHY_TXC1_BW_20MHZ_UP : 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); |
| |
| if (fbr_iscck) /* CCK */ |
| rspec_fallback = |
| CCK_RSPEC(CCK_PHY2MAC_RATE |
| (txh->FragPLCPFallback[0])); |
| else { /* MIMO */ |
| 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 = |
| wlc_rspec_to_rts_rspec(wlc, rspec, false, |
| mimo_ctlchbw); |
| rts_rspec_fallback = |
| wlc_rspec_to_rts_rspec(wlc, rspec_fallback, |
| false, mimo_ctlchbw); |
| } |
| } |
| |
| /* if (first mpdu for host agg) */ |
| /* test whether to add more */ |
| if ((MCS_RATE(mcs, true, false) >= f->dmaxferrate) && |
| (count == f->mcs2ampdu_table[mcs])) { |
| WL_AMPDU_ERR("wl%d: PR 37644: stopping ampdu at %d for mcs %d\n", |
| wlc->pub->unit, count, mcs); |
| break; |
| } |
| |
| if (count == scb_ampdu->max_pdu) { |
| WL_NONE("Stop taking from q, reached %d deep\n", |
| scb_ampdu->max_pdu); |
| break; |
| } |
| |
| /* check to see if the next pkt is a candidate for aggregation */ |
| p = pktq_ppeek(&qi->q, prec); |
| tx_info = IEEE80211_SKB_CB(p); /* tx_info must be checked with current p */ |
| |
| if (p) { |
| if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && |
| ((u8) (p->priority) == tid)) { |
| |
| plen = |
| pkttotlen(p) + AMPDU_MAX_MPDU_OVERHEAD; |
| plen = max(scb_ampdu->min_len, plen); |
| |
| if ((plen + ampdu_len) > maxlen) { |
| p = NULL; |
| WL_ERROR("%s: Bogus plen #1\n", |
| __func__); |
| ASSERT(3 == 4); |
| continue; |
| } |
| |
| /* check if there are enough descriptors available */ |
| if (TXAVAIL(wlc, fifo) <= (seg_cnt + 1)) { |
| WL_ERROR("%s: No fifo space !!!!!!\n", |
| __func__); |
| p = NULL; |
| continue; |
| } |
| p = pktq_pdeq(&qi->q, prec); |
| ASSERT(p); |
| } else { |
| p = NULL; |
| } |
| } |
| } /* end while(p) */ |
| |
| ini->tx_in_transit += count; |
| |
| if (count) { |
| WLCNTADD(ampdu->cnt->txmpdu, count); |
| |
| /* patch up the last txh */ |
| txh = (d11txh_t *) pkt[count - 1]->data; |
| 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; |
| 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 ? WLC_GET_CCK_PLCP_LEN(txh->FragPLCPFallback) |
| : WLC_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback); |
| ampdu_len -= roundup(len, 4) - len; |
| |
| /* patch up the first txh & plcp */ |
| txh = (d11txh_t *) pkt[0]->data; |
| plcp = (u8 *) (txh + 1); |
| |
| WLC_SET_MIMO_PLCP_LEN(plcp, ampdu_len); |
| /* mark plcp to indicate ampdu */ |
| WLC_SET_MIMO_PLCP_AMPDU(plcp); |
| |
| /* reset the mixed mode header durations */ |
| if (txh->MModeLen) { |
| u16 mmodelen = |
| wlc_calc_lsig_len(wlc, rspec, ampdu_len); |
| txh->MModeLen = cpu_to_le16(mmodelen); |
| preamble_type = WLC_MM_PREAMBLE; |
| } |
| if (txh->MModeFbrLen) { |
| u16 mmfbrlen = |
| wlc_calc_lsig_len(wlc, rspec_fallback, ampdu_len); |
| txh->MModeFbrLen = cpu_to_le16(mmfbrlen); |
| fbr_preamble_type = WLC_MM_PREAMBLE; |
| } |
| |
| /* set the preload length */ |
| if (MCS_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; |
| rts = (struct ieee80211_rts *)&txh->rts_frame; |
| if ((mch & TXC_PREAMBLE_RTS_MAIN_SHORT) == |
| TXC_PREAMBLE_RTS_MAIN_SHORT) |
| rts_preamble_type = WLC_SHORT_PREAMBLE; |
| |
| if ((mch & TXC_PREAMBLE_RTS_FB_SHORT) == |
| TXC_PREAMBLE_RTS_FB_SHORT) |
| rts_fbr_preamble_type = WLC_SHORT_PREAMBLE; |
| |
| durid = |
| wlc_compute_rtscts_dur(wlc, use_cts, rts_rspec, |
| rspec, rts_preamble_type, |
| preamble_type, ampdu_len, |
| true); |
| rts->duration = cpu_to_le16(durid); |
| durid = wlc_compute_rtscts_dur(wlc, use_cts, |
| rts_rspec_fallback, |
| rspec_fallback, |
| rts_fbr_preamble_type, |
| fbr_preamble_type, |
| 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) { |
| WLCNTADD(ampdu->cnt->txfbr_mpdu, count); |
| WLCNTINCR(ampdu->cnt->txfbr_ampdu); |
| mch |= TXC_AMPDU_FBR; |
| txh->MacTxControlHigh = cpu_to_le16(mch); |
| WLC_SET_MIMO_PLCP_AMPDU(plcp); |
| WLC_SET_MIMO_PLCP_AMPDU(txh->FragPLCPFallback); |
| } |
| |
| WL_AMPDU_TX("wl%d: wlc_sendampdu: count %d ampdu_len %d\n", |
| wlc->pub->unit, count, ampdu_len); |
| |
| /* inform rate_sel if it this is a rate probe pkt */ |
| frameid = le16_to_cpu(txh->TxFrameID); |
| if (frameid & TXFID_RATE_PROBE_MASK) { |
| WL_ERROR("%s: XXX what to do with TXFID_RATE_PROBE_MASK!?\n", |
| __func__); |
| } |
| for (i = 0; i < count; i++) |
| wlc_txfifo(wlc, fifo, pkt[i], i == (count - 1), |
| ampdu->txpkt_weight); |
| |
| } |
| /* endif (count) */ |
| return err; |
| } |
| |
| void BCMFASTPATH |
| wlc_ampdu_dotxstatus(struct ampdu_info *ampdu, struct scb *scb, |
| struct sk_buff *p, tx_status_t *txs) |
| { |
| scb_ampdu_t *scb_ampdu; |
| struct wlc_info *wlc = ampdu->wlc; |
| scb_ampdu_tid_ini_t *ini; |
| u32 s1 = 0, s2 = 0; |
| struct ieee80211_tx_info *tx_info; |
| |
| tx_info = IEEE80211_SKB_CB(p); |
| ASSERT(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| ASSERT(txs->status & TX_STATUS_AMPDU); |
| |
| /* 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 */ |
| while (((s1 = R_REG(&wlc->regs->frmtxstatus)) & TXS_V) == 0) { |
| udelay(1); |
| status_delay++; |
| if (status_delay > 10) { |
| ASSERT(status_delay <= 10); |
| return; |
| } |
| } |
| |
| ASSERT(!(s1 & TX_STATUS_INTERMEDIATE)); |
| ASSERT(s1 & TX_STATUS_AMPDU); |
| s2 = R_REG(&wlc->regs->frmtxstatus2); |
| } |
| |
| if (likely(scb)) { |
| ASSERT(scb->magic == SCB_MAGIC); |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| ASSERT(scb_ampdu); |
| ini = SCB_AMPDU_INI(scb_ampdu, p->priority); |
| ASSERT(ini->scb == scb); |
| wlc_ampdu_dotxstatus_complete(ampdu, scb, p, txs, s1, s2); |
| } else { |
| /* loop through all pkts and free */ |
| u8 queue = txs->frameid & TXFID_QUEUE_MASK; |
| d11txh_t *txh; |
| u16 mcl; |
| while (p) { |
| tx_info = IEEE80211_SKB_CB(p); |
| txh = (d11txh_t *) p->data; |
| mcl = le16_to_cpu(txh->MacTxControlLow); |
| ASSERT(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| 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 = GETNEXTTXP(wlc, queue); |
| ASSERT(p != NULL); |
| } |
| wlc_txfifo_complete(wlc, queue, ampdu->txpkt_weight); |
| } |
| wlc_ampdu_txflowcontrol(wlc, scb_ampdu, ini); |
| } |
| |
| void |
| rate_status(struct wlc_info *wlc, struct ieee80211_tx_info *tx_info, |
| tx_status_t *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; |
| } |
| } |
| |
| #define SHORTNAME "AMPDU status" |
| |
| static void BCMFASTPATH |
| wlc_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, struct scb *scb, |
| struct sk_buff *p, tx_status_t *txs, |
| u32 s1, u32 s2) |
| { |
| scb_ampdu_t *scb_ampdu; |
| struct wlc_info *wlc = ampdu->wlc; |
| scb_ampdu_tid_ini_t *ini; |
| u8 bitmap[8], queue, tid; |
| d11txh_t *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 update_rate = true, retry = true, tx_error = false; |
| u16 mimoantsel = 0; |
| u8 antselid = 0; |
| u8 retry_limit, rr_retry_limit; |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(p); |
| |
| #ifdef BCMDBG |
| u8 hole[AMPDU_MAX_MPDU]; |
| memset(hole, 0, sizeof(hole)); |
| #endif |
| |
| ASSERT(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| ASSERT(txs->status & TX_STATUS_AMPDU); |
| |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| ASSERT(scb_ampdu); |
| |
| tid = (u8) (p->priority); |
| |
| ini = SCB_AMPDU_INI(scb_ampdu, tid); |
| retry_limit = ampdu->retry_limit_tid[tid]; |
| rr_retry_limit = ampdu->rr_retry_limit_tid[tid]; |
| |
| ASSERT(ini->scb == scb); |
| |
| memset(bitmap, 0, sizeof(bitmap)); |
| queue = txs->frameid & TXFID_QUEUE_MASK; |
| ASSERT(queue < AC_COUNT); |
| |
| supr_status = txs->status & TX_STATUS_SUPR_MASK; |
| |
| if (txs->status & TX_STATUS_ACK_RCV) { |
| if (TX_STATUS_SUPR_UF == supr_status) { |
| update_rate = false; |
| } |
| |
| ASSERT(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; |
| |
| ASSERT(!(s1 & TX_STATUS_INTERMEDIATE)); |
| ASSERT(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 { |
| WLCNTINCR(ampdu->cnt->noba); |
| if (supr_status) { |
| update_rate = false; |
| if (supr_status == TX_STATUS_SUPR_BADCH) { |
| WL_ERROR("%s: Pkt tx suppressed, illegal channel possibly %d\n", |
| __func__, |
| CHSPEC_CHANNEL(wlc->default_bss->chanspec)); |
| } else { |
| if (supr_status == TX_STATUS_SUPR_FRAG) |
| WL_NONE("%s: AMPDU frag err\n", |
| __func__); |
| else |
| WL_ERROR("%s: wlc_ampdu_dotxstatus: 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; |
| wlc->pub->_cnt->txchanrej++; |
| } else if (supr_status == TX_STATUS_SUPR_EXPTIME) { |
| |
| wlc->pub->_cnt->txexptime++; |
| |
| /* 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. |
| */ |
| if (wlc_ffpld_check_txfunfl(wlc, prio2fifo[tid]) |
| > 0) { |
| tx_error = true; |
| } |
| } |
| } else if (txs->phyerr) { |
| update_rate = false; |
| wlc->pub->_cnt->txphyerr++; |
| WL_ERROR("wl%d: wlc_ampdu_dotxstatus: tx phy error (0x%x)\n", |
| wlc->pub->unit, txs->phyerr); |
| |
| if (WL_ERROR_ON()) { |
| prpkt("txpkt (AMPDU)", p); |
| wlc_print_txdesc((d11txh_t *) p->data); |
| } |
| wlc_print_txstatus(txs); |
| } |
| } |
| |
| /* loop through all pkts and retry if not acked */ |
| while (p) { |
| tx_info = IEEE80211_SKB_CB(p); |
| ASSERT(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| txh = (d11txh_t *) 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; |
| |
| 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) { |
| bindex = MODSUB_POW2(seq, start_seq, SEQNUM_MAX); |
| |
| WL_AMPDU_TX("%s: tid %d seq is %d, start_seq is %d, bindex is %d set %d, index %d\n", |
| __func__, tid, seq, start_seq, bindex, |
| isset(bitmap, bindex), index); |
| |
| /* if acked then clear bit and free packet */ |
| if ((bindex < AMPDU_TX_BA_MAX_WSIZE) |
| && isset(bitmap, bindex)) { |
| ini->tx_in_transit--; |
| ini->txretry[index] = 0; |
| |
| /* ampdu_ack_len: number of acked aggregated frames */ |
| /* ampdu_ack_map: block ack bit map for the aggregation */ |
| /* ampdu_len: number of aggregated frames */ |
| rate_status(wlc, tx_info, txs, mcs); |
| tx_info->flags |= IEEE80211_TX_STAT_ACK; |
| tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
| |
| /* XXX TODO: Make these accurate. */ |
| tx_info->status.ampdu_ack_len = |
| (txs-> |
| status & TX_STATUS_FRM_RTX_MASK) >> |
| TX_STATUS_FRM_RTX_SHIFT; |
| tx_info->status.ampdu_len = |
| (txs-> |
| status & TX_STATUS_FRM_RTX_MASK) >> |
| TX_STATUS_FRM_RTX_SHIFT; |
| |
| 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) { |
| struct ieee80211_tx_rate *txrate = |
| tx_info->status.rates; |
| if (retry && (txrate[0].count < (int)retry_limit)) { |
| ini->txretry[index]++; |
| ini->tx_in_transit--; |
| /* Use high prededence for retransmit to give some punch */ |
| /* wlc_txq_enq(wlc, scb, p, WLC_PRIO_TO_PREC(tid)); */ |
| wlc_txq_enq(wlc, scb, p, |
| WLC_PRIO_TO_HI_PREC(tid)); |
| } else { |
| /* Retry timeout */ |
| ini->tx_in_transit--; |
| ieee80211_tx_info_clear_status(tx_info); |
| tx_info->flags |= |
| IEEE80211_TX_STAT_AMPDU_NO_BACK; |
| skb_pull(p, D11_PHY_HDR_LEN); |
| skb_pull(p, D11_TXH_LEN); |
| WL_ERROR("%s: BA Timeout, seq %d, in_transit %d\n", |
| SHORTNAME, seq, ini->tx_in_transit); |
| 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 = GETNEXTTXP(wlc, queue); |
| if (p == NULL) { |
| ASSERT(p); |
| break; |
| } |
| } |
| wlc_send_q(wlc, wlc->active_queue); |
| |
| /* update rate state */ |
| antselid = wlc_antsel_antsel2id(wlc->asi, mimoantsel); |
| |
| wlc_txfifo_complete(wlc, queue, ampdu->txpkt_weight); |
| } |
| |
| static void |
| ampdu_cleanup_tid_ini(struct ampdu_info *ampdu, scb_ampdu_t *scb_ampdu, u8 tid, |
| bool force) |
| { |
| scb_ampdu_tid_ini_t *ini; |
| ini = SCB_AMPDU_INI(scb_ampdu, tid); |
| if (!ini) |
| return; |
| |
| WL_AMPDU_CTL("wl%d: ampdu_cleanup_tid_ini: tid %d\n", |
| ampdu->wlc->pub->unit, tid); |
| |
| if (ini->tx_in_transit && !force) |
| return; |
| |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, ini->scb); |
| ASSERT(ini == &scb_ampdu->ini[ini->tid]); |
| |
| /* free all buffered tx packets */ |
| pktq_pflush(&scb_ampdu->txq, ini->tid, true, NULL, 0); |
| } |
| |
| /* initialize the initiator code for tid */ |
| static scb_ampdu_tid_ini_t *wlc_ampdu_init_tid_ini(struct ampdu_info *ampdu, |
| scb_ampdu_t *scb_ampdu, |
| u8 tid, bool override) |
| { |
| scb_ampdu_tid_ini_t *ini; |
| |
| ASSERT(scb_ampdu); |
| ASSERT(scb_ampdu->scb); |
| ASSERT(SCB_AMPDU(scb_ampdu->scb)); |
| ASSERT(tid < AMPDU_MAX_SCB_TID); |
| |
| /* check for per-tid control of ampdu */ |
| if (!ampdu->ini_enable[tid]) { |
| WL_ERROR("%s: Rejecting tid %d\n", __func__, tid); |
| return NULL; |
| } |
| |
| ini = SCB_AMPDU_INI(scb_ampdu, tid); |
| ini->tid = tid; |
| ini->scb = scb_ampdu->scb; |
| ini->magic = INI_MAGIC; |
| WLCNTINCR(ampdu->cnt->txaddbareq); |
| |
| return ini; |
| } |
| |
| static int wlc_ampdu_set(struct ampdu_info *ampdu, bool on) |
| { |
| struct wlc_info *wlc = ampdu->wlc; |
| |
| wlc->pub->_ampdu = false; |
| |
| if (on) { |
| if (!N_ENAB(wlc->pub)) { |
| WL_AMPDU_ERR("wl%d: driver not nmode enabled\n", |
| wlc->pub->unit); |
| return BCME_UNSUPPORTED; |
| } |
| if (!wlc_ampdu_cap(ampdu)) { |
| WL_AMPDU_ERR("wl%d: device not ampdu capable\n", |
| wlc->pub->unit); |
| return BCME_UNSUPPORTED; |
| } |
| wlc->pub->_ampdu = on; |
| } |
| |
| return 0; |
| } |
| |
| static bool wlc_ampdu_cap(struct ampdu_info *ampdu) |
| { |
| if (WLC_PHY_11N_CAP(ampdu->wlc->band)) |
| return true; |
| else |
| return false; |
| } |
| |
| static void ampdu_update_max_txlen(struct ampdu_info *ampdu, u8 dur) |
| { |
| u32 rate, mcs; |
| |
| for (mcs = 0; mcs < MCS_TABLE_SIZE; mcs++) { |
| /* rate is in Kbps; dur is in msec ==> len = (rate * dur) / 8 */ |
| /* 20MHz, No SGI */ |
| rate = MCS_RATE(mcs, false, false); |
| ampdu->max_txlen[mcs][0][0] = (rate * dur) >> 3; |
| /* 40 MHz, No SGI */ |
| rate = MCS_RATE(mcs, true, false); |
| ampdu->max_txlen[mcs][1][0] = (rate * dur) >> 3; |
| /* 20MHz, SGI */ |
| rate = MCS_RATE(mcs, false, true); |
| ampdu->max_txlen[mcs][0][1] = (rate * dur) >> 3; |
| /* 40 MHz, SGI */ |
| rate = MCS_RATE(mcs, true, true); |
| ampdu->max_txlen[mcs][1][1] = (rate * dur) >> 3; |
| } |
| } |
| |
| u8 BCMFASTPATH |
| wlc_ampdu_null_delim_cnt(struct ampdu_info *ampdu, struct scb *scb, |
| ratespec_t rspec, int phylen) |
| { |
| scb_ampdu_t *scb_ampdu; |
| int bytes, cnt, tmp; |
| u8 tx_density; |
| |
| ASSERT(scb); |
| ASSERT(SCB_AMPDU(scb)); |
| |
| scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); |
| ASSERT(scb_ampdu); |
| |
| if (scb_ampdu->mpdu_density == 0) |
| return 0; |
| |
| /* RSPEC2RATE is in kbps units ==> ~RSPEC2RATE/2^13 is in bytes/usec |
| density x is in 2^(x-4) usec |
| ==> # of bytes needed for req density = rate/2^(17-x) |
| ==> # of null delimiters = ceil(ceil(rate/2^(17-x)) - phylen)/4) |
| */ |
| |
| tx_density = scb_ampdu->mpdu_density; |
| |
| ASSERT(tx_density <= AMPDU_MAX_MPDU_DENSITY); |
| tmp = 1 << (17 - tx_density); |
| bytes = CEIL(RSPEC2RATE(rspec), tmp); |
| |
| if (bytes > phylen) { |
| cnt = CEIL(bytes - phylen, AMPDU_DELIMITER_LEN); |
| ASSERT(cnt <= 255); |
| return (u8) cnt; |
| } else |
| return 0; |
| } |
| |
| void wlc_ampdu_macaddr_upd(struct wlc_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); |
| wlc_write_template_ram(wlc, (T_BA_TPL_BASE + 16), (T_RAM_ACCESS_SZ * 2), |
| template); |
| } |
| |
| bool wlc_aggregatable(struct wlc_info *wlc, u8 tid) |
| { |
| return wlc->ampdu->ini_enable[tid]; |
| } |
| |
| void wlc_ampdu_shm_upd(struct ampdu_info *ampdu) |
| { |
| struct wlc_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) { |
| wlc_write_shm(wlc, M_MIMO_MAXSYM, MIMO_MAXSYM_MAX); |
| wlc_write_shm(wlc, M_WATCHDOG_8TU, WATCHDOG_8TU_MAX); |
| } else { |
| wlc_write_shm(wlc, M_MIMO_MAXSYM, MIMO_MAXSYM_DEF); |
| wlc_write_shm(wlc, M_WATCHDOG_8TU, WATCHDOG_8TU_DEF); |
| } |
| } |
| |
| struct cb_del_ampdu_pars { |
| struct ieee80211_sta *sta; |
| u16 tid; |
| }; |
| |
| /* |
| * callback function that helps flushing ampdu packets from a priority queue |
| */ |
| static bool cb_del_ampdu_pkt(void *p, int arg_a) |
| { |
| struct sk_buff *mpdu = (struct sk_buff *)p; |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(mpdu); |
| struct cb_del_ampdu_pars *ampdu_pars = |
| (struct cb_del_ampdu_pars *)arg_a; |
| bool rc; |
| |
| rc = tx_info->flags & IEEE80211_TX_CTL_AMPDU ? true : false; |
| rc = rc && (tx_info->control.sta == NULL || ampdu_pars->sta == NULL || |
| tx_info->control.sta == ampdu_pars->sta); |
| rc = rc && ((u8)(mpdu->priority) == ampdu_pars->tid); |
| return rc; |
| } |
| |
| /* |
| * 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->control.sta == sta || sta == NULL)) |
| tx_info->control.sta = 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 wlc_ampdu_flush(struct wlc_info *wlc, |
| struct ieee80211_sta *sta, u16 tid) |
| { |
| struct wlc_txq_info *qi = wlc->active_queue; |
| struct pktq *pq = &qi->q; |
| int prec; |
| struct cb_del_ampdu_pars ampdu_pars; |
| |
| ampdu_pars.sta = sta; |
| ampdu_pars.tid = tid; |
| for (prec = 0; prec < pq->num_prec; prec++) { |
| pktq_pflush(pq, prec, true, cb_del_ampdu_pkt, |
| (int)&du_pars); |
| } |
| wlc_inval_dma_pkts(wlc->hw, sta, dma_cb_fn_ampdu); |
| } |