diff options
Diffstat (limited to 'drivers/net/wireless/b43/pio.c')
-rw-r--r-- | drivers/net/wireless/b43/pio.c | 75 |
1 files changed, 15 insertions, 60 deletions
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c index 69138e8..3498b68 100644 --- a/drivers/net/wireless/b43/pio.c +++ b/drivers/net/wireless/b43/pio.c @@ -32,9 +32,6 @@ #include <linux/delay.h> -static void b43_pio_rx_work(struct work_struct *work); - - static u16 generate_cookie(struct b43_pio_txqueue *q, struct b43_pio_txpacket *pack) { @@ -144,7 +141,6 @@ static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev, q = kzalloc(sizeof(*q), GFP_KERNEL); if (!q) return NULL; - spin_lock_init(&q->lock); q->dev = dev; q->rev = dev->dev->id.revision; q->mmio_base = index_to_pioqueue_base(dev, index) + @@ -179,12 +175,10 @@ static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev, q = kzalloc(sizeof(*q), GFP_KERNEL); if (!q) return NULL; - spin_lock_init(&q->lock); q->dev = dev; q->rev = dev->dev->id.revision; q->mmio_base = index_to_pioqueue_base(dev, index) + pio_rxqueue_offset(dev); - INIT_WORK(&q->rx_work, b43_pio_rx_work); /* Enable Direct FIFO RX (PIO) on the engine. */ b43_dma_direct_fifo_rx(dev, index, 1); @@ -249,13 +243,6 @@ void b43_pio_free(struct b43_wldev *dev) destroy_queue_tx(pio, tx_queue_AC_BK); } -void b43_pio_stop(struct b43_wldev *dev) -{ - if (!b43_using_pio_transfers(dev)) - return; - cancel_work_sync(&dev->pio.rx_queue->rx_work); -} - int b43_pio_init(struct b43_wldev *dev) { struct b43_pio *pio = &dev->pio; @@ -461,8 +448,8 @@ static int pio_tx_frame(struct b43_pio_txqueue *q, cookie = generate_cookie(q, pack); hdrlen = b43_txhdr_size(q->dev); - err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb->data, - skb->len, info, cookie); + err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb, + info, cookie); if (err) return err; @@ -494,7 +481,6 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) { struct b43_pio_txqueue *q; struct ieee80211_hdr *hdr; - unsigned long flags; unsigned int hdrlen, total_len; int err = 0; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); @@ -512,20 +498,18 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) q = select_queue_by_priority(dev, skb_get_queue_mapping(skb)); } - spin_lock_irqsave(&q->lock, flags); - hdrlen = b43_txhdr_size(dev); total_len = roundup(skb->len + hdrlen, 4); if (unlikely(total_len > q->buffer_size)) { err = -ENOBUFS; b43dbg(dev->wl, "PIO: TX packet longer than queue.\n"); - goto out_unlock; + goto out; } if (unlikely(q->free_packet_slots == 0)) { err = -ENOBUFS; b43warn(dev->wl, "PIO: TX packet overflow.\n"); - goto out_unlock; + goto out; } B43_WARN_ON(q->buffer_used > q->buffer_size); @@ -534,7 +518,7 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) err = -EBUSY; ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb)); q->stopped = 1; - goto out_unlock; + goto out; } /* Assign the queue number to the ring (if not already done before) @@ -548,11 +532,11 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) * anymore and must not transmit it unencrypted. */ dev_kfree_skb_any(skb); err = 0; - goto out_unlock; + goto out; } if (unlikely(err)) { b43err(dev->wl, "PIO transmission failure\n"); - goto out_unlock; + goto out; } q->nr_tx_packets++; @@ -564,13 +548,10 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) q->stopped = 1; } -out_unlock: - spin_unlock_irqrestore(&q->lock, flags); - +out: return err; } -/* Called with IRQs disabled. */ void b43_pio_handle_txstatus(struct b43_wldev *dev, const struct b43_txstatus *status) { @@ -584,8 +565,6 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev, return; B43_WARN_ON(!pack); - spin_lock(&q->lock); /* IRQs are already disabled. */ - info = IEEE80211_SKB_CB(pack->skb); b43_fill_txstatus_report(dev, info, status); @@ -603,8 +582,6 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev, ieee80211_wake_queue(dev->wl->hw, q->queue_prio); q->stopped = 0; } - - spin_unlock(&q->lock); } void b43_pio_get_tx_stats(struct b43_wldev *dev, @@ -612,17 +589,14 @@ void b43_pio_get_tx_stats(struct b43_wldev *dev, { const int nr_queues = dev->wl->hw->queues; struct b43_pio_txqueue *q; - unsigned long flags; int i; for (i = 0; i < nr_queues; i++) { q = select_queue_by_priority(dev, i); - spin_lock_irqsave(&q->lock, flags); stats[i].len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots; stats[i].limit = B43_PIO_MAX_NR_TXPACKETS; stats[i].count = q->nr_tx_packets; - spin_unlock_irqrestore(&q->lock, flags); } } @@ -760,37 +734,23 @@ rx_error: return 1; } -/* RX workqueue. We can sleep, yay! */ -static void b43_pio_rx_work(struct work_struct *work) +void b43_pio_rx(struct b43_pio_rxqueue *q) { - struct b43_pio_rxqueue *q = container_of(work, struct b43_pio_rxqueue, - rx_work); - unsigned int budget = 50; + unsigned int count = 0; bool stop; - do { - spin_lock_irq(&q->lock); + while (1) { stop = (pio_rx_frame(q) == 0); - spin_unlock_irq(&q->lock); - cond_resched(); if (stop) break; - } while (--budget); -} - -/* Called with IRQs disabled. */ -void b43_pio_rx(struct b43_pio_rxqueue *q) -{ - /* Due to latency issues we must run the RX path in - * a workqueue to be able to schedule between packets. */ - queue_work(q->dev->wl->hw->workqueue, &q->rx_work); + cond_resched(); + if (WARN_ON_ONCE(++count > 10000)) + break; + } } static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q) { - unsigned long flags; - - spin_lock_irqsave(&q->lock, flags); if (q->rev >= 8) { b43_piotx_write32(q, B43_PIO8_TXCTL, b43_piotx_read32(q, B43_PIO8_TXCTL) @@ -800,14 +760,10 @@ static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q) b43_piotx_read16(q, B43_PIO_TXCTL) | B43_PIO_TXCTL_SUSPREQ); } - spin_unlock_irqrestore(&q->lock, flags); } static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q) { - unsigned long flags; - - spin_lock_irqsave(&q->lock, flags); if (q->rev >= 8) { b43_piotx_write32(q, B43_PIO8_TXCTL, b43_piotx_read32(q, B43_PIO8_TXCTL) @@ -817,7 +773,6 @@ static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q) b43_piotx_read16(q, B43_PIO_TXCTL) & ~B43_PIO_TXCTL_SUSPREQ); } - spin_unlock_irqrestore(&q->lock, flags); } void b43_pio_tx_suspend(struct b43_wldev *dev) |