diff options
Diffstat (limited to 'drivers/net')
6 files changed, 39 insertions, 3 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd.h b/drivers/net/wireless/brcm80211/brcmfmac/dhd.h index 28db9cf39672..86cbfe2c7c6c 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd.h @@ -583,6 +583,7 @@ enum brcmf_netif_stop_reason { * @bssidx: index of bss associated with this interface. * @mac_addr: assigned mac address. * @netif_stop: bitmap indicates reason why netif queues are stopped. + * @netif_stop_lock: spinlock for update netif_stop from multiple sources. * @pend_8021x_cnt: tracks outstanding number of 802.1x frames. * @pend_8021x_wait: used for signalling change in count. */ @@ -598,6 +599,7 @@ struct brcmf_if { s32 bssidx; u8 mac_addr[ETH_ALEN]; u8 netif_stop; + spinlock_t netif_stop_lock; atomic_t pend_8021x_cnt; wait_queue_head_t pend_8021x_wait; }; diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c index b98f2235978e..df37645f493e 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c @@ -240,11 +240,15 @@ done: void brcmf_txflowblock_if(struct brcmf_if *ifp, enum brcmf_netif_stop_reason reason, bool state) { + unsigned long flags; + if (!ifp) return; brcmf_dbg(TRACE, "enter: idx=%d stop=0x%X reason=%d state=%d\n", ifp->bssidx, ifp->netif_stop, reason, state); + + spin_lock_irqsave(&ifp->netif_stop_lock, flags); if (state) { if (!ifp->netif_stop) netif_stop_queue(ifp->ndev); @@ -254,6 +258,7 @@ void brcmf_txflowblock_if(struct brcmf_if *ifp, if (!ifp->netif_stop) netif_wake_queue(ifp->ndev); } + spin_unlock_irqrestore(&ifp->netif_stop_lock, flags); } void brcmf_txflowblock(struct device *dev, bool state) @@ -264,6 +269,8 @@ void brcmf_txflowblock(struct device *dev, bool state) brcmf_dbg(TRACE, "Enter\n"); + brcmf_fws_bus_blocked(drvr, state); + for (i = 0; i < BRCMF_MAX_IFS; i++) brcmf_txflowblock_if(drvr->iflist[i], BRCMF_NETIF_STOP_REASON_BLOCK_BUS, state); @@ -779,6 +786,7 @@ struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx, ifp->bssidx = bssidx; init_waitqueue_head(&ifp->pend_8021x_wait); + spin_lock_init(&ifp->netif_stop_lock); if (mac_addr != NULL) memcpy(ifp->mac_addr, mac_addr, ETH_ALEN); diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c index d2487518bd2a..6f3d181659ef 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c @@ -2369,12 +2369,12 @@ static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt) } else { ret = 0; } - spin_unlock_bh(&bus->txqlock); if (pktq_len(&bus->txq) >= TXHI) { bus->txoff = true; brcmf_txflowblock(bus->sdiodev->dev, true); } + spin_unlock_bh(&bus->txqlock); #ifdef DEBUG if (pktq_plen(&bus->txq, prec) > qcount[prec]) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c index bc2edc04e525..c1930ef5c55f 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c @@ -431,6 +431,7 @@ struct brcmf_fws_info { u32 fifo_credit_map; u32 fifo_delay_map; unsigned long borrow_defer_timestamp; + bool bus_flow_blocked; }; /* @@ -1833,6 +1834,7 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) brcmf_fws_lock(drvr, flags); if (skcb->mac->suppressed || + fws->bus_flow_blocked || brcmf_fws_mac_desc_closed(fws, skcb->mac, fifo) || brcmu_pktq_mlen(&skcb->mac->psq, 3 << (fifo * 2)) || (!multicast && @@ -1905,7 +1907,8 @@ static void brcmf_fws_dequeue_worker(struct work_struct *worker) brcmf_dbg(TRACE, "enter: fws=%p\n", fws); brcmf_fws_lock(fws->drvr, flags); - for (fifo = NL80211_NUM_ACS; fifo >= 0; fifo--) { + for (fifo = NL80211_NUM_ACS; fifo >= 0 && !fws->bus_flow_blocked; + fifo--) { brcmf_dbg(TRACE, "fifo %d credit %d\n", fifo, fws->fifo_credit[fifo]); for (credit = 0; credit < fws->fifo_credit[fifo]; /* nop */) { @@ -1915,9 +1918,12 @@ static void brcmf_fws_dequeue_worker(struct work_struct *worker) if (brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) credit++; + if (fws->bus_flow_blocked) + break; } if ((fifo == BRCMF_FWS_FIFO_AC_BE) && - (credit == fws->fifo_credit[fifo])) { + (credit == fws->fifo_credit[fifo]) && + (!fws->bus_flow_blocked)) { fws->fifo_credit[fifo] -= credit; while (brcmf_fws_borrow_credit(fws) == 0) { skb = brcmf_fws_deq(fws, fifo); @@ -1929,6 +1935,8 @@ static void brcmf_fws_dequeue_worker(struct work_struct *worker) brcmf_fws_return_credits(fws, fifo, 1); break; } + if (fws->bus_flow_blocked) + break; } } else { fws->fifo_credit[fifo] -= credit; @@ -2060,3 +2068,12 @@ void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) } brcmf_fws_unlock(fws->drvr, flags); } + +void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) +{ + struct brcmf_fws_info *fws = drvr->fws; + + fws->bus_flow_blocked = flow_blocked; + if (!flow_blocked) + brcmf_fws_schedule_deq(fws); +} diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.h b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.h index fbe483d23752..9fc860910bd8 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.h @@ -29,5 +29,6 @@ void brcmf_fws_reset_interface(struct brcmf_if *ifp); void brcmf_fws_add_interface(struct brcmf_if *ifp); void brcmf_fws_del_interface(struct brcmf_if *ifp); void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb); +void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked); #endif /* FWSIGNAL_H_ */ diff --git a/drivers/net/wireless/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/brcm80211/brcmfmac/usb.c index 01aed7ad6bec..322cadc51ded 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/usb.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/usb.c @@ -82,6 +82,7 @@ struct brcmf_usbdev_info { int tx_high_watermark; int tx_freecount; bool tx_flowblock; + spinlock_t tx_flowblock_lock; struct brcmf_usbreq *tx_reqs; struct brcmf_usbreq *rx_reqs; @@ -411,6 +412,7 @@ static void brcmf_usb_tx_complete(struct urb *urb) { struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context; struct brcmf_usbdev_info *devinfo = req->devinfo; + unsigned long flags; brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status, req->skb); @@ -419,11 +421,13 @@ static void brcmf_usb_tx_complete(struct urb *urb) brcmf_txcomplete(devinfo->dev, req->skb, urb->status == 0); req->skb = NULL; brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount); + spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags); if (devinfo->tx_freecount > devinfo->tx_high_watermark && devinfo->tx_flowblock) { brcmf_txflowblock(devinfo->dev, false); devinfo->tx_flowblock = false; } + spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags); } static void brcmf_usb_rx_complete(struct urb *urb) @@ -568,6 +572,7 @@ static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb) struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); struct brcmf_usbreq *req; int ret; + unsigned long flags; brcmf_dbg(USB, "Enter, skb=%p\n", skb); if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) { @@ -599,11 +604,13 @@ static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb) goto fail; } + spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags); if (devinfo->tx_freecount < devinfo->tx_low_watermark && !devinfo->tx_flowblock) { brcmf_txflowblock(dev, true); devinfo->tx_flowblock = true; } + spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags); return 0; fail: @@ -1164,6 +1171,7 @@ struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo, /* Initialize the spinlocks */ spin_lock_init(&devinfo->qlock); + spin_lock_init(&devinfo->tx_flowblock_lock); INIT_LIST_HEAD(&devinfo->rx_freeq); INIT_LIST_HEAD(&devinfo->rx_postq); |
