Return-path: Received: from nbd.name ([46.4.11.11]:40171 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753361Ab2CCORS (ORCPT ); Sat, 3 Mar 2012 09:17:18 -0500 From: Felix Fietkau To: linux-wireless@vger.kernel.org Cc: linville@tuxdriver.com, mcgrof@qca.qualcomm.com Subject: [PATCH 4/5] ath9k: get rid of double queueing of rx frames on EDMA Date: Sat, 3 Mar 2012 15:17:05 +0100 Message-Id: <1330784226-65563-4-git-send-email-nbd@openwrt.org> (sfid-20120303_151727_655157_67679B07) In-Reply-To: <1330784226-65563-3-git-send-email-nbd@openwrt.org> References: <1330784226-65563-1-git-send-email-nbd@openwrt.org> <1330784226-65563-2-git-send-email-nbd@openwrt.org> <1330784226-65563-3-git-send-email-nbd@openwrt.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: Process rx status directly instead of separating the completion test from the actual rx status processing. Signed-off-by: Felix Fietkau --- drivers/net/wireless/ath/ath9k/ar9003_mac.c | 18 +++------- drivers/net/wireless/ath/ath9k/ath9k.h | 1 - drivers/net/wireless/ath/ath9k/recv.c | 47 +++++++++++++-------------- 3 files changed, 29 insertions(+), 37 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c index 8d1bca0..acf2ca2 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c @@ -440,20 +440,14 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs, struct ar9003_rxs *rxsp = (struct ar9003_rxs *) buf_addr; unsigned int phyerr; - /* TODO: byte swap on big endian for ar9300_10 */ - - if (!rxs) { - if ((rxsp->status11 & AR_RxDone) == 0) - return -EINPROGRESS; - - if (MS(rxsp->ds_info, AR_DescId) != 0x168c) - return -EINVAL; + if ((rxsp->status11 & AR_RxDone) == 0) + return -EINPROGRESS; - if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0) - return -EINPROGRESS; + if (MS(rxsp->ds_info, AR_DescId) != 0x168c) + return -EINVAL; - return 0; - } + if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0) + return -EINPROGRESS; rxs->rs_status = 0; rxs->rs_flags = 0; diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index c2ccba6..3d8e51c 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -299,7 +299,6 @@ struct ath_tx { struct ath_rx_edma { struct sk_buff_head rx_fifo; - struct sk_buff_head rx_buffers; u32 rx_fifo_hwsize; }; diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 7e1a91a..cdba79f 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -232,7 +232,6 @@ static void ath_rx_edma_cleanup(struct ath_softc *sc) static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size) { skb_queue_head_init(&rx_edma->rx_fifo); - skb_queue_head_init(&rx_edma->rx_buffers); rx_edma->rx_fifo_hwsize = size; } @@ -658,7 +657,9 @@ static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb, bool mybeacon) } static bool ath_edma_get_buffers(struct ath_softc *sc, - enum ath9k_rx_qtype qtype) + enum ath9k_rx_qtype qtype, + struct ath_rx_status *rs, + struct ath_buf **dest) { struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype]; struct ath_hw *ah = sc->sc_ah; @@ -677,7 +678,7 @@ static bool ath_edma_get_buffers(struct ath_softc *sc, dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr, common->rx_bufsize, DMA_FROM_DEVICE); - ret = ath9k_hw_process_rxdesc_edma(ah, NULL, skb->data); + ret = ath9k_hw_process_rxdesc_edma(ah, rs, skb->data); if (ret == -EINPROGRESS) { /*let device gain the buffer again*/ dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, @@ -690,20 +691,21 @@ static bool ath_edma_get_buffers(struct ath_softc *sc, /* corrupt descriptor, skip this one and the following one */ list_add_tail(&bf->list, &sc->rx.rxbuf); ath_rx_edma_buf_link(sc, qtype); - skb = skb_peek(&rx_edma->rx_fifo); - if (!skb) - return true; - bf = SKB_CB_ATHBUF(skb); - BUG_ON(!bf); + skb = skb_peek(&rx_edma->rx_fifo); + if (skb) { + bf = SKB_CB_ATHBUF(skb); + BUG_ON(!bf); - __skb_unlink(skb, &rx_edma->rx_fifo); - list_add_tail(&bf->list, &sc->rx.rxbuf); - ath_rx_edma_buf_link(sc, qtype); - return true; + __skb_unlink(skb, &rx_edma->rx_fifo); + list_add_tail(&bf->list, &sc->rx.rxbuf); + ath_rx_edma_buf_link(sc, qtype); + } else { + bf = NULL; + } } - skb_queue_tail(&rx_edma->rx_buffers, skb); + *dest = bf; return true; } @@ -711,18 +713,15 @@ static struct ath_buf *ath_edma_get_next_rx_buf(struct ath_softc *sc, struct ath_rx_status *rs, enum ath9k_rx_qtype qtype) { - struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype]; - struct sk_buff *skb; - struct ath_buf *bf; + struct ath_buf *bf = NULL; - while (ath_edma_get_buffers(sc, qtype)); - skb = __skb_dequeue(&rx_edma->rx_buffers); - if (!skb) - return NULL; + while (ath_edma_get_buffers(sc, qtype, rs, &bf)) { + if (!bf) + continue; - bf = SKB_CB_ATHBUF(skb); - ath9k_hw_process_rxdesc_edma(sc->sc_ah, rs, skb->data); - return bf; + return bf; + } + return NULL; } static struct ath_buf *ath_get_next_rx_buf(struct ath_softc *sc, -- 1.7.3.2