diff options
Diffstat (limited to 'drivers/staging/brcm80211/brcmsmac/wlc_ampdu.c')
| -rw-r--r-- | drivers/staging/brcm80211/brcmsmac/wlc_ampdu.c | 1253 |
1 files changed, 0 insertions, 1253 deletions
diff --git a/drivers/staging/brcm80211/brcmsmac/wlc_ampdu.c b/drivers/staging/brcm80211/brcmsmac/wlc_ampdu.c deleted file mode 100644 index 85ad70096056..000000000000 --- a/drivers/staging/brcm80211/brcmsmac/wlc_ampdu.c +++ /dev/null @@ -1,1253 +0,0 @@ -/* - * 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 <aiutils.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" - -#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) - -/* 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 */ - -}; - -/* used for flushing ampdu packets */ -struct cb_del_ampdu_pars { - struct ieee80211_sta *sta; - u16 tid; -}; - -#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_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; - - ampdu = kzalloc(sizeof(struct ampdu_info), GFP_ATOMIC); - if (!ampdu) { - wiphy_err(wlc->wiphy, "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); -} - -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]); -} - -static 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) { - BCMMSG(wlc->wiphy, "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)) { - 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; - - BCMMSG(wlc->wiphy, "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) { - 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 underflow 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; - - BCMMSG(wlc->wiphy, "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 -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 -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; - struct wiphy *wiphy; - - wlc = ampdu->wlc; - wiphy = wlc->wiphy; - p = *pdu; - - tid = (u8) (p->priority); - - f = ampdu->fifo_tb + prio2fifo[tid]; - - scb = wlc->pub->global_scb; - scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); - 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 -EBUSY; - } - - wlc_ampdu_agg(ampdu, scb, p, tid); - - if (wlc->block_datafifo) { - wiphy_err(wiphy, "%s: Fifo blocked\n", __func__); - return -EBUSY; - } - 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 { - wiphy_err(wiphy, "%s: AMPDU flag is off!\n", __func__); - *pdu = NULL; - err = 0; - break; - } - - if (err) { - if (err == -EBUSY) { - wiphy_err(wiphy, "wl%d: wlc_sendampdu: " - "prep_xdu retry; seq 0x%x\n", - wlc->pub->unit, seq); - *pdu = p; - break; - } - - /* error in the packet; reject it */ - wiphy_err(wiphy, "wl%d: wlc_sendampdu: prep_xdu " - "rejected; seq 0x%x\n", wlc->pub->unit, seq); - *pdu = NULL; - break; - } - - /* pkt is good to be aggregated */ - 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); - txh->PreloadSize = 0; /* always default to 0 */ - - /* Handle retry limits */ - if (txrate[0].count <= rr_retry_limit) { - txrate[0].count++; - rr = true; - fbr = false; - } 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; - - BCMMSG(wlc->wiphy, "wl%d: 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) bcm_pkttotlen(p); - - BCMMSG(wlc->wiphy, "wl%d: 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; - maxlen = - min(scb_ampdu->max_rxlen, - ampdu->max_txlen[mcs][is40][sgi]); - - /* XXX Fix me to honor real max_rxlen */ - /* can fix this as soon as ampdu_action() in mac80211.h - * gets extra u8buf_size par */ - maxlen = 64 * 1024; - - 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])) { - BCMMSG(wlc->wiphy, "wl%d: PR 37644: stopping" - " ampdu at %d for mcs %d\n", - wlc->pub->unit, count, mcs); - break; - } - - if (count == 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 = - bcm_pkttotlen(p) + AMPDU_MAX_MPDU_OVERHEAD; - plen = max(scb_ampdu->min_len, plen); - - if ((plen + ampdu_len) > maxlen) { - p = NULL; - wiphy_err(wiphy, "%s: Bogus plen #1\n", - __func__); - continue; - } - - /* check if there are enough descriptors available */ - if (TXAVAIL(wlc, fifo) <= (seg_cnt + 1)) { - wiphy_err(wiphy, "%s: No fifo space " - "!!\n", __func__); - p = NULL; - continue; - } - p = bcm_pktq_pdeq(&qi->q, prec); - } else { - p = NULL; - } - } - } /* end while(p) */ - - ini->tx_in_transit += count; - - if (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) { - mch |= TXC_AMPDU_FBR; - txh->MacTxControlHigh = cpu_to_le16(mch); - WLC_SET_MIMO_PLCP_AMPDU(plcp); - WLC_SET_MIMO_PLCP_AMPDU(txh->FragPLCPFallback); - } - - BCMMSG(wlc->wiphy, "wl%d: 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) { - wiphy_err(wiphy, "%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 -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); - - /* 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) { - return; /* error condition */ - } - } - - s2 = R_REG(&wlc->regs->frmtxstatus2); - } - - if (likely(scb)) { - scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); - ini = SCB_AMPDU_INI(scb_ampdu, p->priority); - 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); - bcm_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); - } - wlc_txfifo_complete(wlc, queue, ampdu->txpkt_weight); - } - wlc_ampdu_txflowcontrol(wlc, scb_ampdu, ini); -} - -static 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 -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); - struct wiphy *wiphy = wlc->wiphy; - -#ifdef BCMDBG - u8 hole[AMPDU_MAX_MPDU]; - memset(hole, 0, sizeof(hole)); -#endif - - scb_ampdu = SCB_AMPDU_CUBBY(ampdu, scb); - 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]; - 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) { - if (TX_STATUS_SUPR_UF == supr_status) { - update_rate = false; - } - - 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) { - update_rate = false; - if (supr_status == TX_STATUS_SUPR_BADCH) { - wiphy_err(wiphy, "%s: Pkt tx suppressed, " - "illegal channel possibly %d\n", - __func__, CHSPEC_CHANNEL( - wlc->default_bss->chanspec)); - } else { - if (supr_status != TX_STATUS_SUPR_FRAG) - wiphy_err(wiphy, "%s: wlc_ampdu_dotx" - "status: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. - */ - if (wlc_ffpld_check_txfunfl(wlc, prio2fifo[tid]) - > 0) { - tx_error = true; - } - } - } else if (txs->phyerr) { - update_rate = false; - wiphy_err(wiphy, "wl%d: wlc_ampdu_dotxstatus: tx phy " - "error (0x%x)\n", wlc->pub->unit, - txs->phyerr); - - if (WL_ERROR_ON()) { - bcm_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); - 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); - BCMMSG(wlc->wiphy, "tid %d seq %d," - " start_seq %d, bindex %d set %d, index %d\n", - 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_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; - 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) { - 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->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); - wiphy_err(wiphy, "%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); - } - wlc_send_q(wlc); - - /* update rate state */ - antselid = wlc_antsel_antsel2id(wlc->asi, mimoantsel); - - wlc_txfifo_complete(wlc, queue, ampdu->txpkt_weight); -} - -/* 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; - - /* check for per-tid control of ampdu */ - if (!ampdu->ini_enable[tid]) { - wiphy_err(ampdu->wlc->wiphy, "%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; - 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)) { - wiphy_err(ampdu->wlc->wiphy, "wl%d: driver not " - "nmode enabled\n", wlc->pub->unit); - return -ENOTSUPP; - } - if (!wlc_ampdu_cap(ampdu)) { - wiphy_err(ampdu->wlc->wiphy, "wl%d: device not " - "ampdu capable\n", wlc->pub->unit); - return -ENOTSUPP; - } - 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; - } -} - -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); - } -} - -/* - * callback function that helps flushing ampdu packets from a priority queue - */ -static bool cb_del_ampdu_pkt(struct sk_buff *mpdu, void *arg_a) -{ - 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->pkt_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++) { - bcm_pktq_pflush(pq, prec, true, cb_del_ampdu_pkt, - (void *)&du_pars); - } - wlc_inval_dma_pkts(wlc->hw, sta, dma_cb_fn_ampdu); -} |