X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=carlfw%2Fsrc%2Fwlan.c;h=4e73a2b1d99b111aba324a502ea7539efd5e346f;hb=HEAD;hp=1f4afa3b618d147a7a7b9b493f85a86b5ae60a4c;hpb=fa097d02ca1683946b2207c8ebf69538e8c3cb9c;p=carl9170fw.git diff --git a/carlfw/src/wlan.c b/carlfw/src/wlan.c index 1f4afa3..4e73a2b 100644 --- a/carlfw/src/wlan.c +++ b/carlfw/src/wlan.c @@ -6,7 +6,7 @@ * Copyright (c) 2000-2005 ZyDAS Technology Corporation * Copyright (c) 2007-2009 Atheros Communications, Inc. * Copyright 2009 Johannes Berg - * Copyright 2009, 2010 Christian Lamparter + * Copyright 2009-2012 Christian Lamparter * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -19,8 +19,7 @@ * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * with this program; If not, see . */ #include "carl9170.h" @@ -31,44 +30,7 @@ #include "printf.h" #include "rf.h" #include "linux/ieee80211.h" - -static void wlan_txunstuck(unsigned int queue) -{ - set_wlan_txq_dma_addr(queue, ((uint32_t) fw.wlan.tx_queue[queue].head) | 1); - wlan_trigger(BIT(queue)); -} - -static void wlan_txupdate(unsigned int queue) -{ - set_wlan_txq_dma_addr(queue, ((uint32_t) fw.wlan.tx_queue[queue].head)); - wlan_trigger(BIT(queue)); -} - -static void wlan_dma_bump(unsigned int qidx) -{ - unsigned int offset = qidx; - uint32_t status, trigger; - - status = get(AR9170_MAC_REG_DMA_STATUS) >> 12; - trigger = get(AR9170_MAC_REG_DMA_TRIGGER) >> 12; - - while (offset != 0) { - status >>= 4; - trigger >>= 4; - offset--; - } - - status &= 0xf; - trigger &= 0xf; - - if ((trigger == 0xa) && (status == 0x8)) { - DBG("UNSTUCK"); - wlan_txunstuck(qidx); - } else { - DBG("UPDATE"); - wlan_txupdate(qidx); - } -} +#include "wol.h" #ifdef CONFIG_CARL9170FW_DEBUG static void wlan_dump_queue(unsigned int qidx) @@ -93,7 +55,7 @@ static void wlan_dump_queue(unsigned int qidx) entries++; } - desc = get_wlan_txq_addr(qidx); + desc = (struct dma_desc *)get_wlan_txq_addr(qidx); DBG("Queue: %d: te:%d td:%d h:%p c:%p t:%p", qidx, entries, queue_len(&fw.wlan.tx_queue[qidx]), @@ -108,637 +70,26 @@ static void wlan_dump_queue(unsigned int qidx) } #endif /* CONFIG_CARL9170FW_DEBUG */ -static void wlan_send_buffered_tx_status(void) -{ - unsigned int len; - - while (fw.wlan.tx_status_pending) { - len = min((unsigned int)fw.wlan.tx_status_pending, - CARL9170_RSP_TX_STATUS_NUM); - len = min(len, CARL9170_TX_STATUS_NUM - fw.wlan.tx_status_head_idx); - - /* - * rather than memcpy each individual request into a large buffer, - * we _splice_ them all together. - * - * The only downside is however that we have to be careful around - * the edges of the tx_status_cache. - * - * Note: - * Each tx_status is about 2 bytes. However every command package - * must have a size which is a multiple of 4. - */ - - send_cmd_to_host((len * sizeof(struct carl9170_tx_status) + 3) & ~3, - CARL9170_RSP_TXCOMP, len, (void *) - &fw.wlan.tx_status_cache[fw.wlan.tx_status_head_idx]); - - fw.wlan.tx_status_pending -= len; - fw.wlan.tx_status_head_idx += len; - fw.wlan.tx_status_head_idx %= CARL9170_TX_STATUS_NUM; - } -} - -static struct carl9170_tx_status *wlan_get_tx_status_buffer(void) -{ - struct carl9170_tx_status *tmp; - - tmp = &fw.wlan.tx_status_cache[fw.wlan.tx_status_tail_idx++]; - fw.wlan.tx_status_tail_idx %= CARL9170_TX_STATUS_NUM; - - if (fw.wlan.tx_status_pending == CARL9170_TX_STATUS_NUM) - wlan_send_buffered_tx_status(); - - fw.wlan.tx_status_pending++; - - return tmp; -} - -/* generate _aggregated_ tx_status for the host */ -static void wlan_tx_complete(struct carl9170_tx_superframe *super, - bool txs) -{ - struct carl9170_tx_status *status; - - status = wlan_get_tx_status_buffer(); - - /* - * The *unique* cookie and AC_ID is used by the driver for - * frame lookup. - */ - status->cookie = super->s.cookie; - status->queue = super->s.queue; - - /* - * This field holds the number of tries of the rate in - * the rate index field (rix). - */ - status->rix = super->s.rix; - status->tries = super->s.cnt; - status->success = (txs) ? 1 : 0; -} - -static bool wlan_tx_consume_retry(struct carl9170_tx_superframe *super) -{ - /* check if this was the last possible retry with this rate */ - if (unlikely(super->s.cnt >= super->s.ri[super->s.rix].tries)) { - /* end of the road - indicate tx failure */ - if (unlikely(super->s.rix == CARL9170_TX_MAX_RETRY_RATES)) - return false; - - /* check if there are alternative rates available */ - if (!super->s.rr[super->s.rix].set) - return false; - - /* try next retry rate */ - super->f.hdr.phy.set = super->s.rr[super->s.rix].set; - - /* finally - mark the old rate as USED */ - super->s.rix++; - - /* update MAC flags */ - super->f.hdr.mac.erp_prot = super->s.ri[super->s.rix].erp_prot; - - /* reinitialize try counter */ - super->s.cnt = 1; - } else { - /* just increase retry counter */ - super->s.cnt++; - } - - return true; -} - -/* for all tries */ -static void __wlan_tx(struct dma_desc *desc) -{ - struct carl9170_tx_superframe *super = get_super(desc); -#ifdef CONFIG_CARL9170FW_NORMAL_TX_RX - unsigned int queue = super->s.queue; -#endif /* CONFIG_CARL9170FW_LOOPBACK */ - - if (unlikely(super->s.fill_in_tsf)) { - struct ieee80211_mgmt *mgmt = (void *) &super->f.data.i3e; - uint32_t *tsf = (uint32_t *) &mgmt->u.probe_resp.timestamp; - - /* - * Truth be told: this is a hack. - * - * The *real* TSF is definitely going to be higher/older. - * But this hardware emulation code is head and shoulders - * above anything a driver can possibly do. - * - * (even, if it's got an accurate atomic clock source). - */ - - read_tsf(tsf); - } - -#if (defined CONFIG_CARL9170FW_LOOPBACK) || (defined CONFIG_CARL9170FW_DISCARD) - wlan_tx_complete(super, true); - unhide_super(desc); -# ifdef CONFIG_CARL9170FW_LOOPBACK - dma_put(&fw.pta.up_queue, desc); - up_trigger(); -# elif CONFIG_CARL9170FW_DISCARD - dma_reclaim(&fw.pta.down_queue, desc); - down_trigger(); -# endif -#else /* CONFIG_CARL9170FW_LOOPBACK */ - -# if ((defined CONFIG_CARL9170FW_DEBUG) && (defined CONFIG_CARL9170FW_PSM)) - BUG_ON(fw.phy.psm.state != CARL9170_PSM_WAKE); -# endif /* CONFIG_CARL9170FW_DEBUG && CONFIG_CARL9170FW_PSM */ - - /* insert desc into the right queue */ - dma_put(&fw.wlan.tx_queue[queue], desc); - wlan_trigger(BIT(queue)); -#endif /* CONFIG_CARL9170FW_LOOPBACK */ -} - -/* prepares frame for the first transmission */ -static void _wlan_tx(struct dma_desc *desc) -{ - struct carl9170_tx_superframe *super = get_super(desc); - - if (unlikely(super->s.ampdu_commit_density)) { - set(AR9170_MAC_REG_AMPDU_DENSITY, - MOD_VAL(AR9170_MAC_AMPDU_DENSITY, - get(AR9170_MAC_REG_AMPDU_DENSITY), - super->s.ampdu_density)); - } - - if (unlikely(super->s.ampdu_commit_factor)) { - set(AR9170_MAC_REG_AMPDU_FACTOR, - MOD_VAL(AR9170_MAC_AMPDU_FACTOR, - get(AR9170_MAC_REG_AMPDU_FACTOR), - 8 << super->s.ampdu_factor)); - } - - __wlan_tx(desc); -} - -/* propagate transmission status back to the driver */ -static bool wlan_tx_status(struct dma_queue *queue, - struct dma_desc *desc) -{ - struct ar9170_tx_frame *frame = DESC_PAYLOAD(desc); - struct carl9170_tx_superframe *super = get_super(desc); - struct ieee80211_hdr *hdr = &super->f.data.i3e; - unsigned int qidx = super->s.queue; - bool txfail, success; - - success = true; - - if (!!(desc->ctrl & AR9170_CTRL_FAIL)) { - txfail = !!(desc->ctrl & AR9170_CTRL_TXFAIL); - - /* reset retry indicator flags */ - desc->ctrl &= ~(AR9170_CTRL_TXFAIL | AR9170_CTRL_BAFAIL); - - if (wlan_tx_consume_retry(super)) { - /* - * retry for simple and aggregated 802.11 frames. - * - * Note: We must not mess up the original frame - * order. - */ - - if (!frame->hdr.mac.ampdu) { - /* - * 802.11 - 7.1.3.1.5. - * set "Retry Field" for consecutive attempts - * - * Note: For AMPDU see: - * 802.11n 9.9.1.6 "Retransmit Procedures" - */ - - hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); - } - - if (txfail) { - /* Normal TX Failure */ - - /* demise descriptor ownership back to the hardware */ - dma_rearm(desc); - - /* - * And this will get the queue going again. - * To understand why: you have to get the HW - * specs... But sadly I never saw them. - */ - wlan_txunstuck(qidx); - - /* abort cycle - this is necessary due to HW design */ - return false; - } else { - /* (HT-) BlockACK failure */ - - /* - * Unlink the failed attempt and put it into - * the retry queue. The caller routine must - * be aware of this so the frames don't get lost. - */ - - dma_unlink_head(queue); -#ifdef CONFIG_CARL9170FW_DELAYED_TX - dma_put(&fw.wlan.tx_retry, desc); -#else - __wlan_tx(desc); -#endif /* CONFIG_CARL9170FW_DELAYED_TX */ - return true; - } - } else { - /* out of frame attempts - discard frame */ - success = false; - } - } - - dma_unlink_head(queue); - if (txfail) { - /* - * Issue the queue bump, - * We need to do this in case this was the frame's last - * possible retry attempt and it unfortunately: it failed. - */ - - wlan_txunstuck(qidx); - } - - unhide_super(desc); - - /* update hangcheck */ - fw.wlan.last_tx_desc_num[qidx] = 0; - -#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ - if (unlikely(super == (void *) &dma_mem.reserved.ba)) { - fw.wlan.ba_desc = desc; - fw.wlan.ba_desc_available = 1; - return true; - } -#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */ - - wlan_tx_complete(super, success); - -#ifdef CONFIG_CARL9170FW_CAB_QUEUE - if (unlikely(super->s.cab)) - fw.wlan.cab_queue_len--; -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ - - /* recycle freed descriptors */ - dma_reclaim(&fw.pta.down_queue, desc); - down_trigger(); - return true; -} - -static void handle_tx_completion(void) -{ - struct dma_desc *desc; - unsigned int i; - - for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) { - __while_desc_bits(desc, &fw.wlan.tx_queue[i], AR9170_OWN_BITS_SW) { - if (!wlan_tx_status(&fw.wlan.tx_queue[i], desc)) { - /* termination requested. */ - break; - } - } - -#ifdef CONFIG_CARL9170FW_DELAYED_TX - for_each_desc(desc, &fw.wlan.tx_retry) - __wlan_tx(desc); - - for_each_desc(desc, &fw.wlan.tx_delay[i]) - _wlan_tx(desc); -#endif /* CONFIG_CARL9170FW_DELAYED_TX */ - } -} - -void __hot wlan_tx(struct dma_desc *desc) -{ - struct carl9170_tx_superframe *super = DESC_PAYLOAD(desc); - - /* initialize rate control struct */ - super->s.rix = 0; - super->s.cnt = 1; - hide_super(desc); - -#ifdef CONFIG_CARL9170FW_DELAYED_TX - if (!queue_empty(&fw.wlan.tx_queue[super->s.queue])) { - dma_put(&fw.wlan.tx_delay[super->s.queue], desc); - return; - } -#endif /* CONFIG_CARL9170FW_DELAYED_TX */ - -#ifdef CONFIG_CARL9170FW_CAB_QUEUE - if (unlikely(super->s.cab)) { - fw.wlan.cab_queue_len++; - dma_put(&fw.wlan.cab_queue, desc); - return; - } -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ - - _wlan_tx(desc); -} - -#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ -static void wlan_send_buffered_ba(void) -{ - struct carl9170_tx_ba_superframe *baf = &dma_mem.reserved.ba.ba; - struct ieee80211_ba *ba = (struct ieee80211_ba *) &baf->f.ba; - struct carl9170_bar_ctx *ctx; - - if (likely(fw.wlan.ba_head_idx == fw.wlan.ba_tail_idx)) - return; - - /* there's no point to continue when the ba_desc is not available. */ - if (!fw.wlan.ba_desc_available) - return; - - ctx = &fw.wlan.ba_cache[fw.wlan.ba_head_idx % CONFIG_CARL9170FW_BACK_REQS_NUM]; - fw.wlan.ba_head_idx++; - - /* Format BlockAck */ - fw.wlan.ba_desc->status = 0; - fw.wlan.ba_desc->ctrl = AR9170_CTRL_FS_BIT | AR9170_CTRL_LS_BIT; - fw.wlan.ba_desc_available = 0; - fw.wlan.ba_desc->nextAddr = fw.wlan.ba_desc->lastAddr = - fw.wlan.ba_desc; - - baf->s.len = fw.wlan.ba_desc->totalLen = fw.wlan.ba_desc->dataSize = - sizeof(struct carl9170_tx_superdesc) + - sizeof(struct ar9170_tx_hwdesc) + - sizeof(struct ieee80211_ba); - - baf->s.ri[0].tries = 3; - baf->s.queue = 0; - baf->f.hdr.length = sizeof(struct ieee80211_ba) + FCS_LEN; - - /* HW Duration / Backoff */ - baf->f.hdr.mac.backoff = 1; - baf->f.hdr.mac.hw_duration = 1; - - /* take the TX rate from the RX'd BAR */ - baf->f.hdr.phy.set = ctx->phy; - baf->f.hdr.phy.tx_power = 29; /* 14.5 dBm */ - - /* format outgoing BA */ - ba->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK); - ba->duration = cpu_to_le16(0); - memcpy(ba->ta, ctx->ta, 6); - memcpy(ba->ra, ctx->ra, 6); - - /* - * Unfortunately, we cannot look into the hardware's scoreboard. - * Therefore we have to proceed as described in 802.11n 9.10.7.5 - * and send a null BlockAck. - */ - memset(ba->bitmap, 0x0, sizeof(ba->bitmap)); - - /* - * NB: - * not entirely sure if this is 100% correct?! - */ - ba->control = ctx->control | cpu_to_le16(1); - ba->start_seq_num = ctx->start_seq_num; - - wlan_tx(fw.wlan.ba_desc); -} - -static struct carl9170_bar_ctx *wlan_get_bar_cache_buffer(void) -{ - struct carl9170_bar_ctx *tmp; - - /* expire oldest entry, if we ran out of ba_ctx' */ - if (fw.wlan.ba_head_idx + CONFIG_CARL9170FW_BACK_REQS_NUM < fw.wlan.ba_tail_idx) - fw.wlan.ba_head_idx++; - - tmp = &fw.wlan.ba_cache[fw.wlan.ba_tail_idx % CONFIG_CARL9170FW_BACK_REQS_NUM]; - fw.wlan.ba_tail_idx++; - - return tmp; -} - -static void handle_bar(struct dma_desc *desc) -{ - struct ieee80211_hdr *hdr; - struct ieee80211_bar *bar; - struct carl9170_bar_ctx *ctx; - - hdr = ar9170_get_rx_i3e(desc); - - /* check if this is a BAR for us */ - if (likely(!ieee80211_is_back_req(hdr->frame_control))) - return ; - - if (unlikely(ar9170_get_rx_macstatus_error(desc))) { - /* - * This check does a number of things: - * 1. checks if the frame is in good nick - * 2. checks if the RA (MAC) matches - */ - return ; - } - - if (unlikely(ar9170_get_rx_mpdu_len(desc) < - sizeof(struct ieee80211_bar))) { - /* - * Sneaky, corrupted BARs... but not with us! - */ - - return ; - } - - bar = (void *) hdr; - - if ((bar->control & cpu_to_le16(IEEE80211_BAR_CTRL_MULTI_TID)) || - !(bar->control & cpu_to_le16(IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA))) { - /* not implemented yet */ - - return ; - } - - ctx = wlan_get_bar_cache_buffer(); - - /* Brilliant! The BAR provides all necessary MACs! */ - memcpy(ctx->ra, bar->ta, 6); - memcpy(ctx->ta, bar->ra, 6); - - /* - * NB: - * not entirely sure if this is 100% correct to force the - * imm ack bit or not... - */ - ctx->control = bar->control | cpu_to_le16(1); - ctx->start_seq_num = bar->start_seq_num; - ctx->phy = ar9170_rx_to_phy(desc); - if (unlikely(!ctx->phy)) { - /* provide a backup, in case ar9170_rx_to_phy fails */ - ctx->phy = cpu_to_le32(0x2cc301); - } -} -#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */ - static void wlan_check_rx_overrun(void) { uint32_t overruns, total; - fw.wlan.rx_total += total = get(AR9170_MAC_REG_RX_TOTAL); - fw.wlan.rx_overruns += overruns = get(AR9170_MAC_REG_RX_OVERRUN); + fw.tally.rx_total += total = get(AR9170_MAC_REG_RX_TOTAL); + fw.tally.rx_overrun += overruns = get(AR9170_MAC_REG_RX_OVERRUN); if (unlikely(overruns)) { if (overruns == total) { DBG("RX Overrun"); fw.wlan.mac_reset++; } - } -} -static void handle_rx(void) -{ - struct dma_desc *desc; - - wlan_check_rx_overrun(); - - for_each_desc_not_bits(desc, &fw.wlan.rx_queue, AR9170_OWN_BITS_HW) { - if (unlikely(desc->totalLen < 26 || - desc->totalLen > CONFIG_CARL9170FW_RX_FRAME_LEN)) { - /* - * This frame is too damaged to do anything - * useful with it. - */ - dma_reclaim(&fw.wlan.rx_queue, desc); - _wlan_trigger(AR9170_DMA_TRIGGER_RXQ); - } else { -#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ - handle_bar(desc); -#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */ - - dma_put(&fw.pta.up_queue, desc); - up_trigger(); - } + wlan_trigger(AR9170_DMA_TRIGGER_RXQ); } } -#ifdef CONFIG_CARL9170FW_CAB_QUEUE -static uint8_t *beacon_find_ie(uint8_t ie) -{ - struct ieee80211_mgmt *mgmt = getp(AR9170_MAC_REG_BCN_ADDR); - uint8_t *pos, *end; - unsigned int len; - - len = get(AR9170_MAC_REG_BCN_LENGTH); - - if (len < FCS_LEN + sizeof(mgmt)) - return NULL; - - pos = mgmt->u.beacon.variable; - end = (uint8_t *) ((unsigned long)mgmt + (len - FCS_LEN)); - while (pos < end) { - if (pos + 2 + pos[1] > end) - return NULL; - - if (pos[0] == ie) - return pos; - - pos += pos[1] + 2; - } - - return NULL; -} - -static void wlan_cab_flush_queue(void) -{ - struct dma_desc *desc; - uint8_t *_ie; - struct ieee80211_tim_ie *ie; - - /* - * This prevents the code from sending new BC/MC frames - * which were queued after the previous buffered traffic - * has been sent out... They will have to wait until the - * next DTIM beacon comes along. - */ - if (unlikely(fw.wlan.cab_flush_trigger == CARL9170_CAB_TRIGGER_DEFER)) - return ; - - _ie = beacon_find_ie(WLAN_EID_TIM); - if (unlikely(!_ie)) - return ; - - ie = (struct ieee80211_tim_ie *) &_ie[2]; - - /* Ideally, check here for == AR9170_CAB_TRIGGER_ARMED */ - if (fw.wlan.cab_flush_trigger) { - /* move queued frames into the main tx queues */ - for_each_desc(desc, &fw.wlan.cab_queue) { - struct carl9170_tx_superframe *super = get_super(desc); - - if (!queue_empty(&fw.wlan.cab_queue)) { - /* - * Set MOREDATA flag for all, - * but the last queued frame. - * see: 802.11-2007 11.2.1.5 f) - * - * This is actually the reason to why - * we need to prevent the reentry. - */ - - super->f.data.i3e.frame_control |= - cpu_to_le16(IEEE80211_FCTL_MOREDATA); - } else { - super->f.data.i3e.frame_control &= - cpu_to_le16(~IEEE80211_FCTL_MOREDATA); - } - - /* ready to roll! */ - _wlan_tx(desc); - } - } - - /* Transfer finished - waiting for tx status */ - fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_DEFER; -} - -static void wlan_cab_modify_dtim_beacon(void) -{ - uint8_t *_ie; - struct ieee80211_tim_ie *ie; - - _ie = beacon_find_ie(WLAN_EID_TIM); - if (likely(_ie)) { - ie = (struct ieee80211_tim_ie *) &_ie[2]; - - if (!queue_empty(&fw.wlan.cab_queue) && (ie->dtim_count == 0)) { - /* schedule DTIM transfer */ - fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_ARMED; - } else if ((fw.wlan.cab_queue_len == 0) && (fw.wlan.cab_flush_trigger)) { - /* undo all chances to the beacon structure */ - ie->bitmap_ctrl &= ~0x1; - fw.wlan.cab_flush_trigger = CARL9170_CAB_TRIGGER_EMPTY; - } - - if (fw.wlan.cab_flush_trigger) { - /* Set the almighty Multicast Traffic Indication Bit. */ - ie->bitmap_ctrl |= 0x1; - } - } -} -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ - static void handle_beacon_config(void) { uint32_t bcn_count; -#ifdef CONFIG_CARL9170FW_CAB_QUEUE - /* - * The application has now updated the relevant beacon data. - * Now it should be the perfect time to apply the DTIM - * multicast information. - */ - - wlan_cab_modify_dtim_beacon(); -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ - bcn_count = get(AR9170_MAC_REG_BCN_COUNT); send_cmd_to_host(4, CARL9170_RSP_BEACON_CONFIG, 0x00, (uint8_t *) &bcn_count); @@ -746,19 +97,14 @@ static void handle_beacon_config(void) static void handle_pretbtt(void) { -#ifdef CONFIG_CARL9170FW_CAB_QUEUE fw.wlan.cab_flush_time = get_clock_counter(); -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ -#ifdef CONFIG_CARL9170FW_PSM +#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS rf_psm(); send_cmd_to_host(4, CARL9170_RSP_PRETBTT, 0x00, (uint8_t *) &fw.phy.psm.state); -#else - send_cmd_to_host(0, CARL9170_RSP_PRETBTT, 0x00, NULL); -#endif /* CONFIG_CARL9170FW_PSM */ - +#endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */ } static void handle_atim(void) @@ -784,37 +130,13 @@ static void handle_radar(void) static void wlan_janitor(void) { -#ifdef CONFIG_CARL9170FW_CAB_QUEUE - if (unlikely(fw.wlan.cab_flush_trigger)) { - /* - * This is hardcoded into carl9170usb driver. - * - * The driver must set the PRETBTT event to beacon_interval - - * CARL9170_PRETBTT_KUS (usually 6) Kus. - * - * But still, we can only do so much about 802.11-2007 9.3.2.1 & - * 11.2.1.6. Let's hope the current solution is adequate enough. - */ - - if (is_after_msecs(fw.wlan.cab_flush_time, - (CARL9170_TBTT_DELTA))) { - wlan_cab_flush_queue(); - } - } -#endif /* CONFIG_CARL9170FW_CAB_QUEUE */ - -#ifdef CONFIG_CARL9170FW_DELAYED_TX - if (fw.wlan.tx_trigger) { - _wlan_trigger(fw.wlan.tx_trigger); - fw.wlan.tx_trigger = 0; - } -#endif /* CONFIG_CARL9170FW_DELAYED_TX */ + wlan_send_buffered_cab(); wlan_send_buffered_tx_status(); -#ifdef CONFIG_CARL9170FW_HANDLE_BACK_REQ wlan_send_buffered_ba(); -#endif /* CONFIG_CARL9170FW_HANDLE_BACK_REQ */ + + wol_janitor(); } void handle_wlan(void) @@ -832,14 +154,17 @@ void handle_wlan(void) } \ } while (0) + intr |= fw.wlan.soft_int; + fw.wlan.soft_int = 0; + HANDLER(intr, AR9170_MAC_INT_PRETBTT, handle_pretbtt); HANDLER(intr, AR9170_MAC_INT_ATIM, handle_atim); - HANDLER(intr, AR9170_MAC_INT_RXC, handle_rx); + HANDLER(intr, AR9170_MAC_INT_RXC, handle_wlan_rx); HANDLER(intr, (AR9170_MAC_INT_TXC | AR9170_MAC_INT_RETRY_FAIL), - handle_tx_completion); + handle_wlan_tx_completion); #ifdef CONFIG_CARL9170FW_DEBUG HANDLER(intr, AR9170_MAC_INT_QOS, handle_qos); @@ -857,25 +182,31 @@ void handle_wlan(void) #undef HANDLER } +enum { + CARL9170FW_TX_MAC_BUMP = 4, + CARL9170FW_TX_MAC_DEBUG = 6, + CARL9170FW_TX_MAC_RESET = 7, +}; + static void wlan_check_hang(void) { struct dma_desc *desc; - unsigned int i; + int i; - for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) { + for (i = AR9170_TXQ_SPECIAL; i >= AR9170_TXQ0; i--) { if (queue_empty(&fw.wlan.tx_queue[i])) { /* Nothing to do here... move along */ continue; } /* fetch the current DMA queue position */ - desc = get_wlan_txq_addr(i); + desc = (struct dma_desc *)get_wlan_txq_addr(i); /* Stuck frame detection */ - if (unlikely(desc == fw.wlan.last_tx_desc[i])) { - fw.wlan.last_tx_desc_num[i]++; + if (unlikely(DESC_PAYLOAD(desc) == fw.wlan.last_super[i])) { + fw.wlan.last_super_num[i]++; - if (unlikely(fw.wlan.last_tx_desc_num[i] > 6)) { + if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_RESET)) { /* * schedule MAC reset (aka OFF/ON => dead) * @@ -888,7 +219,7 @@ static void wlan_check_hang(void) } #ifdef CONFIG_CARL9170FW_DEBUG - if (unlikely(fw.wlan.last_tx_desc_num[i] > 5)) { + if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_DEBUG)) { /* * Sigh, the queue is almost certainly * dead. Dump the queue content to the @@ -900,22 +231,26 @@ static void wlan_check_hang(void) } #endif /* CONFIG_CARL9170FW_DEBUG */ - if (unlikely(fw.wlan.last_tx_desc_num[i] > 3)) { +#ifdef CONFIG_CARL9170FW_DMA_QUEUE_BUMP + if (unlikely(fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_BUMP)) { /* * Hrrm, bump the queue a bit. * maybe this will get it going again. */ wlan_dma_bump(i); + wlan_trigger(BIT(i)); } +#endif /* CONFIG_CARL9170FW_DMA_QUEUE_BUMP */ } else { /* Nothing stuck */ - fw.wlan.last_tx_desc[i] = desc; - fw.wlan.last_tx_desc_num[i] = 0; + fw.wlan.last_super[i] = DESC_PAYLOAD(desc); + fw.wlan.last_super_num[i] = 0; } } } +#ifdef CONFIG_CARL9170FW_FW_MAC_RESET /* * NB: Resetting the MAC is a two-edged sword. * On most occasions, it does what it is supposed to do. @@ -932,13 +267,16 @@ static void wlan_mac_reset(void) uint32_t cam_mode; uint32_t ack_power; uint32_t rts_cts_tpc; - unsigned int i; + uint32_t rts_cts_rate; + int i; #ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS uint32_t rx_BB; #endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */ - ERR("MAC RESET"); +#ifdef CONFIG_CARL9170FW_NOISY_MAC_RESET + INFO("MAC RESET"); +#endif /* CONFIG_CARL9170FW_NOISY_MAC_RESET */ /* Save aggregation parameters */ agg_wait_counter = get(AR9170_MAC_REG_AMPDU_FACTOR); @@ -952,6 +290,7 @@ static void wlan_mac_reset(void) ack_power = get(AR9170_MAC_REG_ACK_TPC); rts_cts_tpc = get(AR9170_MAC_REG_RTS_CTS_TPC); + rts_cts_rate = get(AR9170_MAC_REG_RTS_CTS_RATE); #ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS /* 0x1c8960 write only */ @@ -993,6 +332,7 @@ static void wlan_mac_reset(void) set(AR9170_MAC_REG_RTS_CTS_TPC, rts_cts_tpc); set(AR9170_MAC_REG_ACK_TPC, ack_power); + set(AR9170_MAC_REG_RTS_CTS_RATE, rts_cts_rate); #ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS set(AR9170_PHY_REG_SWITCH_CHAIN_2, rx_BB); @@ -1004,20 +344,58 @@ static void wlan_mac_reset(void) * set(AR9170_PHY_REG_CCA_THRESHOLD, 0x0); */ - for (i = 0; i < __AR9170_NUM_TX_QUEUES; i++) { - DBG("Q:%d l:%d h:%p t:%p\n", i, queue_len(&fw.wlan.tx_queue[i]), - fw.wlan.tx_queue[i].head, fw.wlan.tx_queue[i].terminator); + val = AR9170_DMA_TRIGGER_RXQ; + /* Reinitialize all WLAN TX DMA queues. */ + for (i = AR9170_TXQ_SPECIAL; i >= AR9170_TXQ0; i--) { + struct dma_desc *iter; + + __for_each_desc_bits(iter, &fw.wlan.tx_queue[i], AR9170_OWN_BITS_SW); + + /* kill the stuck frame */ + if (!is_terminator(&fw.wlan.tx_queue[i], iter) && + fw.wlan.last_super_num[i] >= CARL9170FW_TX_MAC_RESET && + fw.wlan.last_super[i] == DESC_PAYLOAD(iter)) { + struct carl9170_tx_superframe *super = get_super(iter); + + iter->status = AR9170_OWN_BITS_SW; + /* + * Mark the frame as failed. + * The BAFAIL flag allows the frame to sail through + * wlan_tx_status without much "unstuck" trouble. + */ + iter->ctrl &= ~(AR9170_CTRL_FAIL); + iter->ctrl |= AR9170_CTRL_BAFAIL; + + super->s.cnt = CARL9170_TX_MAX_RATE_TRIES; + super->s.rix = CARL9170_TX_MAX_RETRY_RATES; - set_wlan_txq_dma_addr(i, (uint32_t) fw.wlan.tx_queue[i].head); + fw.wlan.last_super_num[i] = 0; + fw.wlan.last_super[i] = NULL; + iter = iter->lastAddr->nextAddr; + } + + set_wlan_txq_dma_addr(i, (uint32_t) iter); + if (!is_terminator(&fw.wlan.tx_queue[i], iter)) + val |= BIT(i); - if (!queue_empty(&fw.wlan.tx_queue[i])) - wlan_trigger(BIT(i)); + DBG("Q:%d l:%d h:%p t:%p cu:%p it:%p ct:%x st:%x\n", i, queue_len(&fw.wlan.tx_queue[i]), + fw.wlan.tx_queue[i].head, fw.wlan.tx_queue[i].terminator, + get_wlan_txq_addr(i), iter, iter->ctrl, iter->status); } - handle_rx(); + fw.wlan.soft_int |= AR9170_MAC_INT_RXC | AR9170_MAC_INT_TXC | + AR9170_MAC_INT_RETRY_FAIL; + set(AR9170_MAC_REG_DMA_RXQ_ADDR, (uint32_t) fw.wlan.rx_queue.head); - wlan_trigger(AR9170_DMA_TRIGGER_RXQ); + wlan_trigger(val); +} +#else +static void wlan_mac_reset(void) +{ + /* The driver takes care of reinitializing the device */ + BUG("MAC RESET"); } +#endif /* CONFIG_CARL9170FW_FW_MAC_RESET */ void __cold wlan_timer(void) {