diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/ampdu.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/ampdu.c | 1144 |
1 files changed, 0 insertions, 1144 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c b/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c deleted file mode 100644 index fa391e4eb..000000000 --- a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c +++ /dev/null @@ -1,1144 +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 <net/mac80211.h> - -#include "rate.h" -#include "scb.h" -#include "phy/phy_hal.h" -#include "antsel.h" -#include "main.h" -#include "ampdu.h" -#include "debug.h" -#include "brcms_trace_events.h" - -/* max number of mpdus in an ampdu */ -#define AMPDU_MAX_MPDU 32 -/* max number of mpdus in an ampdu to a legacy */ -#define AMPDU_NUM_MPDU_LEGACY 16 -/* max Tx ba window size (in pdu) */ -#define AMPDU_TX_BA_MAX_WSIZE 64 -/* default Tx ba window size (in pdu) */ -#define AMPDU_TX_BA_DEF_WSIZE 64 -/* default Rx 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 -/* max dur of tx ampdu (in msec) */ -#define AMPDU_MAX_DUR 5 -/* default tx retry limit */ -#define AMPDU_DEF_RETRY_LIMIT 5 -/* default tx retry limit at reg rate */ -#define AMPDU_DEF_RR_RETRY_LIMIT 2 -/* default ffpld reserved bytes */ -#define AMPDU_DEF_FFPLD_RSVD 2048 -/* # of inis to be freed on detach */ -#define AMPDU_INI_FREE 10 -/* max # of mpdus released at a time */ -#define AMPDU_SCB_MAX_RELEASE 20 - -#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 AMPDU_DELIMITER_LEN 4 - -/* max allowed number of mpdus in an ampdu (2 streams) */ -#define AMPDU_NUM_MPDU 16 - -#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) - -/* modulo add/sub, bound = 2^k */ -#define MODADD_POW2(x, y, bound) (((x) + (y)) & ((bound) - 1)) -#define MODSUB_POW2(x, y, bound) (((x) - (y)) & ((bound) - 1)) - -/* 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. - * - * ampdu_pld_size: number of bytes to be pre-loaded - * mcs2ampdu_table: per-mcs max # of mpdus in an ampdu - * prev_txfunfl: num of underflows last read from the HW macstats counter - * accum_txfunfl: num of underflows since we modified pld params - * accum_txampdu: num of tx ampdu since we modified pld params - * prev_txampdu: previous reading of tx ampdu - * dmaxferrate: estimated dma avg xfer rate in kbits/sec - */ -struct brcms_fifo_info { - u16 ampdu_pld_size; - u8 mcs2ampdu_table[FFPLD_MAX_MCS + 1]; - u16 prev_txfunfl; - u32 accum_txfunfl; - u32 accum_txampdu; - u32 prev_txampdu; - u32 dmaxferrate; -}; - -/* AMPDU module specific state - * - * wlc: pointer to main wlc structure - * scb_handle: scb cubby handle to retrieve data from scb - * ini_enable: per-tid initiator enable/disable of ampdu - * ba_tx_wsize: Tx ba window size (in pdu) - * ba_rx_wsize: Rx ba window size (in pdu) - * retry_limit: mpdu transmit retry limit - * rr_retry_limit: mpdu transmit retry limit at regular rate - * retry_limit_tid: per-tid mpdu transmit retry limit - * rr_retry_limit_tid: per-tid mpdu transmit retry limit at regular rate - * mpdu_density: min mpdu spacing (0-7) ==> 2^(x-1)/8 usec - * max_pdu: max pdus allowed in ampdu - * dur: max duration of an ampdu (in msec) - * rx_factor: maximum rx ampdu factor (0-3) ==> 2^(13+x) bytes - * ffpld_rsvd: number of bytes to reserve for preload - * max_txlen: max size of ampdu per mcs, bw and sgi - * mfbr: enable multiple fallback rate - * tx_max_funl: underflows should be kept such that - * (tx_max_funfl*underflows) < tx frames - * fifo_tb: table of fifo infos - */ -struct ampdu_info { - struct brcms_c_info *wlc; - int scb_handle; - u8 ini_enable[AMPDU_MAX_SCB_TID]; - u8 ba_tx_wsize; - u8 ba_rx_wsize; - u8 retry_limit; - u8 rr_retry_limit; - u8 retry_limit_tid[AMPDU_MAX_SCB_TID]; - u8 rr_retry_limit_tid[AMPDU_MAX_SCB_TID]; - u8 mpdu_density; - s8 max_pdu; - u8 dur; - u8 rx_factor; - u32 ffpld_rsvd; - u32 max_txlen[MCS_TABLE_SIZE][2][2]; - bool mfbr; - u32 tx_max_funl; - struct brcms_fifo_info fifo_tb[NUM_FFPLD_FIFO]; -}; - -/* used for flushing ampdu packets */ -struct cb_del_ampdu_pars { - struct ieee80211_sta *sta; - u16 tid; -}; - -static void brcms_c_scb_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_2_rate(mcs, false, false); - ampdu->max_txlen[mcs][0][0] = (rate * dur) >> 3; - /* 40 MHz, No SGI */ - rate = mcs_2_rate(mcs, true, false); - ampdu->max_txlen[mcs][1][0] = (rate * dur) >> 3; - /* 20MHz, SGI */ - rate = mcs_2_rate(mcs, false, true); - ampdu->max_txlen[mcs][0][1] = (rate * dur) >> 3; - /* 40 MHz, SGI */ - rate = mcs_2_rate(mcs, true, true); - ampdu->max_txlen[mcs][1][1] = (rate * dur) >> 3; - } -} - -static bool brcms_c_ampdu_cap(struct ampdu_info *ampdu) -{ - if (BRCMS_PHY_11N_CAP(ampdu->wlc->band)) - return true; - else - return false; -} - -static int brcms_c_ampdu_set(struct ampdu_info *ampdu, bool on) -{ - struct brcms_c_info *wlc = ampdu->wlc; - struct bcma_device *core = wlc->hw->d11core; - - wlc->pub->_ampdu = false; - - if (on) { - if (!(wlc->pub->_n_enab & SUPPORT_11N)) { - brcms_err(core, "wl%d: driver not nmode enabled\n", - wlc->pub->unit); - return -ENOTSUPP; - } - if (!brcms_c_ampdu_cap(ampdu)) { - brcms_err(core, "wl%d: device not ampdu capable\n", - wlc->pub->unit); - return -ENOTSUPP; - } - wlc->pub->_ampdu = on; - } - - return 0; -} - -static void brcms_c_ffpld_init(struct ampdu_info *ampdu) -{ - int i, j; - struct brcms_fifo_info *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; - - } -} - -struct ampdu_info *brcms_c_ampdu_attach(struct brcms_c_info *wlc) -{ - struct ampdu_info *ampdu; - int i; - - ampdu = kzalloc(sizeof(struct ampdu_info), GFP_ATOMIC); - if (!ampdu) - 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->ffpld_rsvd = AMPDU_DEF_FFPLD_RSVD; - /* - * bump max ampdu rcv size to 64k for all 11n - * devices except 4321A0 and 4321A1 - */ - if (BRCMS_ISNPHY(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; - } - - brcms_c_scb_ampdu_update_max_txlen(ampdu, ampdu->dur); - ampdu->mfbr = false; - /* try to set ampdu to the default value */ - brcms_c_ampdu_set(ampdu, wlc->pub->_ampdu); - - ampdu->tx_max_funl = FFPLD_TX_MAX_UNFL; - brcms_c_ffpld_init(ampdu); - - return ampdu; -} - -void brcms_c_ampdu_detach(struct ampdu_info *ampdu) -{ - kfree(ampdu); -} - -static void brcms_c_scb_ampdu_update_config(struct ampdu_info *ampdu, - struct scb *scb) -{ - struct scb_ampdu *scb_ampdu = &scb->scb_ampdu; - int i; - - scb_ampdu->max_pdu = AMPDU_NUM_MPDU; - - /* 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_rx_ampdu_bytes) - scb_ampdu->release = min_t(u8, scb_ampdu->release, - scb_ampdu->max_rx_ampdu_bytes / 1600); - - scb_ampdu->release = min(scb_ampdu->release, - ampdu->fifo_tb[TX_AC_BE_FIFO]. - mcs2ampdu_table[FFPLD_MAX_MCS]); -} - -static void brcms_c_scb_ampdu_update_config_all(struct ampdu_info *ampdu) -{ - brcms_c_scb_ampdu_update_config(ampdu, &du->wlc->pri_scb); -} - -static void brcms_c_ffpld_calc_mcs2ampdu_table(struct ampdu_info *ampdu, int f) -{ - int i; - u32 phy_rate, dma_rate, tmp; - u8 max_mpdu; - struct brcms_fifo_info *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_2_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_2_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; - } - } -} - -/* 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 brcms_c_ffpld_check_txfunfl(struct brcms_c_info *wlc, int fid) -{ - struct ampdu_info *ampdu = wlc->ampdu; - u32 phy_rate = mcs_2_rate(FFPLD_MAX_MCS, true, false); - u32 txunfl_ratio; - u8 max_mpdu; - u32 current_ampdu_cnt = 0; - u16 max_pld_size; - u32 new_txunfl; - struct brcms_fifo_info *fifo = (ampdu->fifo_tb + fid); - uint xmtfifo_sz; - u16 cur_txunfl; - - /* return if we got here for a different reason than underflows */ - cur_txunfl = brcms_b_read_shm(wlc->hw, - M_UCODE_MACSTAT + - offsetof(struct macstat, txfunfl[fid])); - new_txunfl = (u16) (cur_txunfl - fifo->prev_txfunfl); - if (new_txunfl == 0) { - brcms_dbg_ht(wlc->hw->d11core, - "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 (brcms_b_xmtfifo_sz_get(wlc->hw, 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; - - brcms_dbg_ht(wlc->hw->d11core, "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 */ - brcms_c_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; - - brcms_dbg_ht(wlc->hw->d11core, - "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 */ - brcms_c_ffpld_calc_mcs2ampdu_table(ampdu, fid); - - /* update scb release size */ - brcms_c_scb_ampdu_update_config_all(ampdu); - } - } - fifo->accum_txfunfl = 0; - return 0; -} - -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, plcp3, is40, sgi, 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]; - 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; - - 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 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 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]; - 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) { - 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. - */ - if (brcms_c_ffpld_check_txfunfl(wlc, queue) > 0) - tx_error = true; - } - } else if (txs->phyerr) { - update_rate = false; - 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) { - bindex = MODSUB_POW2(seq, start_seq, SEQNUM_MAX); - 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, - isset(bitmap, bindex), index); - /* if acked then clear bit and free packet */ - if ((bindex < AMPDU_TX_BA_MAX_WSIZE) - && isset(bitmap, bindex)) { - 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 */ - antselid = 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 scb_ampdu *scb_ampdu; - struct brcms_c_info *wlc = ampdu->wlc; - struct scb_ampdu_tid_ini *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 */ - 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) { - scb_ampdu = &scb->scb_ampdu; - ini = &scb_ampdu->ini[p->priority]; - 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) { - tx_info = IEEE80211_SKB_CB(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); -} |