Revert "rtl8180: use NAPI for bottom-half processing"
This reverts commit 030725d2c7c1fafec7ede618647bf30ed79601f0.
This commit relies on commit 5ed3bc7288487bd4f891f420a07319e0b538b4fe
("mac80211: use netif_receive_skb in ieee80211_tx_status callpath")
Unfortunately not all drivers are calling ieee80211_tx_status from a
compatible context, so that commit needs to be reverted in 2.6.36.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c
index 05c6bad..707c688 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
@@ -99,66 +99,19 @@
}
}
-static void rtl8180_handle_tx(struct ieee80211_hw *dev)
+static void rtl8180_handle_rx(struct ieee80211_hw *dev)
{
struct rtl8180_priv *priv = dev->priv;
- struct rtl8180_tx_ring *ring;
- int prio;
-
- spin_lock(&priv->lock);
-
- for (prio = 3; prio >= 0; prio--) {
- ring = &priv->tx_ring[prio];
-
- while (skb_queue_len(&ring->queue)) {
- struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
- struct sk_buff *skb;
- struct ieee80211_tx_info *info;
- u32 flags = le32_to_cpu(entry->flags);
-
- if (flags & RTL818X_TX_DESC_FLAG_OWN)
- break;
-
- ring->idx = (ring->idx + 1) % ring->entries;
- skb = __skb_dequeue(&ring->queue);
- pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
- skb->len, PCI_DMA_TODEVICE);
-
- info = IEEE80211_SKB_CB(skb);
- ieee80211_tx_info_clear_status(info);
-
- if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
- (flags & RTL818X_TX_DESC_FLAG_TX_OK))
- info->flags |= IEEE80211_TX_STAT_ACK;
-
- info->status.rates[0].count = (flags & 0xFF) + 1;
- info->status.rates[1].idx = -1;
-
- ieee80211_tx_status(dev, skb);
- if (ring->entries - skb_queue_len(&ring->queue) == 2)
- ieee80211_wake_queue(dev, prio);
- }
- }
-
- spin_unlock(&priv->lock);
-}
-
-static int rtl8180_poll(struct ieee80211_hw *dev, int budget)
-{
- struct rtl8180_priv *priv = dev->priv;
- unsigned int count = 0;
+ unsigned int count = 32;
u8 signal, agc, sq;
- /* handle pending Tx queue cleanup */
- rtl8180_handle_tx(dev);
-
- while (count++ < budget) {
+ while (count--) {
struct rtl8180_rx_desc *entry = &priv->rx_ring[priv->rx_idx];
struct sk_buff *skb = priv->rx_buf[priv->rx_idx];
u32 flags = le32_to_cpu(entry->flags);
if (flags & RTL818X_RX_DESC_FLAG_OWN)
- break;
+ return;
if (unlikely(flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
RTL818X_RX_DESC_FLAG_FOF |
@@ -198,7 +151,7 @@
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
- ieee80211_rx(dev, skb);
+ ieee80211_rx_irqsafe(dev, skb);
skb = new_skb;
priv->rx_buf[priv->rx_idx] = skb;
@@ -215,16 +168,41 @@
entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
priv->rx_idx = (priv->rx_idx + 1) % 32;
}
+}
- if (count < budget) {
- /* disable polling */
- ieee80211_napi_complete(dev);
+static void rtl8180_handle_tx(struct ieee80211_hw *dev, unsigned int prio)
+{
+ struct rtl8180_priv *priv = dev->priv;
+ struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];
- /* enable interrupts */
- rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
+ while (skb_queue_len(&ring->queue)) {
+ struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
+ struct sk_buff *skb;
+ struct ieee80211_tx_info *info;
+ u32 flags = le32_to_cpu(entry->flags);
+
+ if (flags & RTL818X_TX_DESC_FLAG_OWN)
+ return;
+
+ ring->idx = (ring->idx + 1) % ring->entries;
+ skb = __skb_dequeue(&ring->queue);
+ pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
+ skb->len, PCI_DMA_TODEVICE);
+
+ info = IEEE80211_SKB_CB(skb);
+ ieee80211_tx_info_clear_status(info);
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (flags & RTL818X_TX_DESC_FLAG_TX_OK))
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
+ info->status.rates[0].count = (flags & 0xFF) + 1;
+ info->status.rates[1].idx = -1;
+
+ ieee80211_tx_status_irqsafe(dev, skb);
+ if (ring->entries - skb_queue_len(&ring->queue) == 2)
+ ieee80211_wake_queue(dev, prio);
}
-
- return count;
}
static irqreturn_t rtl8180_interrupt(int irq, void *dev_id)
@@ -233,17 +211,31 @@
struct rtl8180_priv *priv = dev->priv;
u16 reg;
+ spin_lock(&priv->lock);
reg = rtl818x_ioread16(priv, &priv->map->INT_STATUS);
- if (unlikely(reg == 0xFFFF))
+ if (unlikely(reg == 0xFFFF)) {
+ spin_unlock(&priv->lock);
return IRQ_HANDLED;
+ }
rtl818x_iowrite16(priv, &priv->map->INT_STATUS, reg);
- /* disable interrupts */
- rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
+ if (reg & (RTL818X_INT_TXB_OK | RTL818X_INT_TXB_ERR))
+ rtl8180_handle_tx(dev, 3);
- /* enable polling */
- ieee80211_napi_schedule(dev);
+ if (reg & (RTL818X_INT_TXH_OK | RTL818X_INT_TXH_ERR))
+ rtl8180_handle_tx(dev, 2);
+
+ if (reg & (RTL818X_INT_TXN_OK | RTL818X_INT_TXN_ERR))
+ rtl8180_handle_tx(dev, 1);
+
+ if (reg & (RTL818X_INT_TXL_OK | RTL818X_INT_TXL_ERR))
+ rtl8180_handle_tx(dev, 0);
+
+ if (reg & (RTL818X_INT_RX_OK | RTL818X_INT_RX_ERR))
+ rtl8180_handle_rx(dev);
+
+ spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
@@ -255,6 +247,7 @@
struct rtl8180_priv *priv = dev->priv;
struct rtl8180_tx_ring *ring;
struct rtl8180_tx_desc *entry;
+ unsigned long flags;
unsigned int idx, prio;
dma_addr_t mapping;
u32 tx_flags;
@@ -301,7 +294,7 @@
plcp_len |= 1 << 15;
}
- spin_lock(&priv->lock);
+ spin_lock_irqsave(&priv->lock, flags);
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
@@ -325,7 +318,7 @@
if (ring->entries - skb_queue_len(&ring->queue) < 2)
ieee80211_stop_queue(dev, prio);
- spin_unlock(&priv->lock);
+ spin_unlock_irqrestore(&priv->lock, flags);
rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING, (1 << (prio + 4)));
@@ -871,7 +864,6 @@
.prepare_multicast = rtl8180_prepare_multicast,
.configure_filter = rtl8180_configure_filter,
.get_tsf = rtl8180_get_tsf,
- .napi_poll = rtl8180_poll,
};
static void rtl8180_eeprom_register_read(struct eeprom_93cx6 *eeprom)
@@ -1003,8 +995,6 @@
dev->queues = 1;
dev->max_signal = 65;
- dev->napi_weight = 64;
-
reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
reg &= RTL818X_TX_CONF_HWVER_MASK;
switch (reg) {