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path: root/drivers/net/wireless/b43/pio.c
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Diffstat (limited to 'drivers/net/wireless/b43/pio.c')
-rw-r--r--drivers/net/wireless/b43/pio.c75
1 files changed, 15 insertions, 60 deletions
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 69138e8c1db6..3498b68385e7 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)
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