From a6d27d2ac89359f84c1a559b5530967ff671d269 Mon Sep 17 00:00:00 2001 From: "John W. Linville" Date: Thu, 7 Oct 2010 11:31:56 -0400 Subject: [PATCH] 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 --- drivers/net/wireless/rtl818x/rtl8180_dev.c | 128 ++++++++++----------- 1 file changed, 59 insertions(+), 69 deletions(-) diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c index 05c6badbe20..707c688da61 100644 --- a/drivers/net/wireless/rtl818x/rtl8180_dev.c +++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c @@ -99,66 +99,19 @@ void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data) } } -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 @@ static int rtl8180_poll(struct ieee80211_hw *dev, int budget) 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 @@ static int rtl8180_poll(struct ieee80211_hw *dev, int budget) entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR); priv->rx_idx = (priv->rx_idx + 1) % 32; } +} + +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]; - if (count < budget) { - /* disable polling */ - ieee80211_napi_complete(dev); + 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); - /* enable interrupts */ - rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF); - } + 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; - return count; + ieee80211_tx_status_irqsafe(dev, skb); + if (ring->entries - skb_queue_len(&ring->queue) == 2) + ieee80211_wake_queue(dev, prio); + } } static irqreturn_t rtl8180_interrupt(int irq, void *dev_id) @@ -233,17 +211,31 @@ static irqreturn_t rtl8180_interrupt(int irq, void *dev_id) 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); + + 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); - /* enable polling */ - ieee80211_napi_schedule(dev); + 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 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb) 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 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb) 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 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb) 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 @@ static const struct ieee80211_ops rtl8180_ops = { .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 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev, 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) { -- 2.41.0