From e6f5b934fba8c44c87c551e066aa7ca6fde2939e Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Wed, 5 Mar 2008 21:18:49 +0100 Subject: b43: Add QOS support This adds QOS support to the b43 driver. QOS can be disabled on driver level with a module parameter for debugging purposes. Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- drivers/net/wireless/b43/dma.c | 90 +++++++++++++++++++----------------------- 1 file changed, 40 insertions(+), 50 deletions(-) (limited to 'drivers/net/wireless/b43/dma.c') diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c index 3dfb28a..c8ead46 100644 --- a/drivers/net/wireless/b43/dma.c +++ b/drivers/net/wireless/b43/dma.c @@ -291,52 +291,6 @@ static inline int request_slot(struct b43_dmaring *ring) return slot; } -/* Mac80211-queue to b43-ring mapping */ -static struct b43_dmaring *priority_to_txring(struct b43_wldev *dev, - int queue_priority) -{ - struct b43_dmaring *ring; - -/*FIXME: For now we always run on TX-ring-1 */ - return dev->dma.tx_ring1; - - /* 0 = highest priority */ - switch (queue_priority) { - default: - B43_WARN_ON(1); - /* fallthrough */ - case 0: - ring = dev->dma.tx_ring3; - break; - case 1: - ring = dev->dma.tx_ring2; - break; - case 2: - ring = dev->dma.tx_ring1; - break; - case 3: - ring = dev->dma.tx_ring0; - break; - } - - return ring; -} - -/* b43-ring to mac80211-queue mapping */ -static inline int txring_to_priority(struct b43_dmaring *ring) -{ - static const u8 idx_to_prio[] = { 3, 2, 1, 0, }; - unsigned int index; - -/*FIXME: have only one queue, for now */ - return 0; - - index = ring->index; - if (B43_WARN_ON(index >= ARRAY_SIZE(idx_to_prio))) - index = 0; - return idx_to_prio[index]; -} - static u16 b43_dmacontroller_base(enum b43_dmatype type, int controller_idx) { static const u16 map64[] = { @@ -1272,6 +1226,37 @@ static inline int should_inject_overflow(struct b43_dmaring *ring) return 0; } +/* Static mapping of mac80211's queues (priorities) to b43 DMA rings. */ +static struct b43_dmaring * select_ring_by_priority(struct b43_wldev *dev, + u8 queue_prio) +{ + struct b43_dmaring *ring; + + if (b43_modparam_qos) { + /* 0 = highest priority */ + switch (queue_prio) { + default: + B43_WARN_ON(1); + /* fallthrough */ + case 0: + ring = dev->dma.tx_ring3; /* AC_VO */ + break; + case 1: + ring = dev->dma.tx_ring2; /* AC_VI */ + break; + case 2: + ring = dev->dma.tx_ring1; /* AC_BE */ + break; + case 3: + ring = dev->dma.tx_ring0; /* AC_BK */ + break; + } + } else + ring = dev->dma.tx_ring1; + + return ring; +} + int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb, struct ieee80211_tx_control *ctl) { @@ -1294,7 +1279,7 @@ int b43_dma_tx(struct b43_wldev *dev, hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); } else { /* Decide by priority where to put this frame. */ - ring = priority_to_txring(dev, ctl->queue); + ring = select_ring_by_priority(dev, ctl->queue); } spin_lock_irqsave(&ring->lock, flags); @@ -1309,6 +1294,11 @@ int b43_dma_tx(struct b43_wldev *dev, * That would be a mac80211 bug. */ B43_WARN_ON(ring->stopped); + /* Assign the queue number to the ring (if not already done before) + * so TX status handling can use it. The queue to ring mapping is + * static, so we don't need to store it per frame. */ + ring->queue_prio = ctl->queue; + err = dma_tx_fragment(ring, skb, ctl); if (unlikely(err == -ENOKEY)) { /* Drop this packet, as we don't have the encryption key @@ -1325,7 +1315,7 @@ int b43_dma_tx(struct b43_wldev *dev, if ((free_slots(ring) < SLOTS_PER_PACKET) || should_inject_overflow(ring)) { /* This TX ring is full. */ - ieee80211_stop_queue(dev->wl->hw, txring_to_priority(ring)); + ieee80211_stop_queue(dev->wl->hw, ctl->queue); ring->stopped = 1; if (b43_debug(dev, B43_DBG_DMAVERBOSE)) { b43dbg(dev->wl, "Stopped TX ring %d\n", ring->index); @@ -1404,7 +1394,7 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev, dev->stats.last_tx = jiffies; if (ring->stopped) { B43_WARN_ON(free_slots(ring) < SLOTS_PER_PACKET); - ieee80211_wake_queue(dev->wl->hw, txring_to_priority(ring)); + ieee80211_wake_queue(dev->wl->hw, ring->queue_prio); ring->stopped = 0; if (b43_debug(dev, B43_DBG_DMAVERBOSE)) { b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index); @@ -1425,7 +1415,7 @@ void b43_dma_get_tx_stats(struct b43_wldev *dev, for (i = 0; i < nr_queues; i++) { data = &(stats->data[i]); - ring = priority_to_txring(dev, i); + ring = select_ring_by_priority(dev, i); spin_lock_irqsave(&ring->lock, flags); data->len = ring->used_slots / SLOTS_PER_PACKET; -- cgit v1.1