add a 2.6.24 specific patch for the switch driver, thanks to Francesco Gringoli for...

SVN-Revision: 10337

diff --git a/target/linux/adm5120/patches-2.6.24/900-adm5120_switch_napi.patch b/target/linux/adm5120/patches-2.6.24/900-adm5120_switch_napi.patch
new file mode 100644 (file)
index 0000000..5c757a1
--- /dev/null
+++ b/target/linux/adm5120/patches-2.6.24/900-adm5120_switch_napi.patch
@@ -0,0 +1,144 @@
+Index: linux-2.6.24/drivers/net/adm5120sw.c
+===================================================================
+--- linux-2.6.24.orig/drivers/net/adm5120sw.c
++++ linux-2.6.24/drivers/net/adm5120sw.c
+@@ -93,8 +93,14 @@
+ /* ------------------------------------------------------------------------ */
+ 
+ struct adm5120_if_priv {
++      struct net_device *dev;
++
+       unsigned int    vlan_no;
+       unsigned int    port_mask;
++
++#ifdef CONFIG_ADM5120_SWITCH_NAPI
++      struct napi_struct napi;
++#endif
+ };
+ 
+ struct dma_desc {
+@@ -333,7 +339,6 @@ static void sw_dump_regs(void)
+       SW_DBG("rlda: %08X\n", t);
+ }
+ 
+-
+ /* ------------------------------------------------------------------------ */
+ 
+ static inline void adm5120_rx_dma_update(struct dma_desc *desc,
+@@ -495,9 +500,11 @@ static void adm5120_switch_tx(void)
+ }
+ 
+ #ifdef CONFIG_ADM5120_SWITCH_NAPI
+-static int adm5120_if_poll(struct net_device *dev, int *budget)
++static int adm5120_if_poll(struct napi_struct *napi, int limit)
+ {
+-      int limit = min(dev->quota, *budget);
++      struct adm5120_if_priv *priv = container_of(napi,
++                              struct adm5120_if_priv, napi);
++      struct net_device *dev = priv->dev;
+       int done;
+       u32 status;
+ 
+@@ -509,13 +516,10 @@ static int adm5120_if_poll(struct net_de
+       SW_DBG("%s: processing RX ring\n", dev->name);
+       done = adm5120_switch_rx(limit);
+ 
+-      *budget -= done;
+-      dev->quota -= done;
+-
+       status = sw_int_status() & SWITCH_INTS_POLL;
+       if ((done < limit) && (!status)) {
+               SW_DBG("disable polling mode for %s\n", dev->name);
+-              netif_rx_complete(dev);
++              netif_rx_complete(dev, napi);
+               sw_int_unmask(SWITCH_INTS_POLL);
+               return 0;
+       }
+@@ -541,10 +545,12 @@ static irqreturn_t adm5120_switch_irq(in
+ 
+       if (status & SWITCH_INTS_POLL) {
+               struct net_device *dev = dev_id;
++              struct adm5120_if_priv *priv = netdev_priv(dev);
++
+               sw_dump_intr_mask("poll ints", status);
+               SW_DBG("enable polling mode for %s\n", dev->name);
+               sw_int_mask(SWITCH_INTS_POLL);
+-              netif_rx_schedule(dev);
++              netif_rx_schedule(dev, &priv->napi);
+       }
+ #else
+       sw_int_ack(status);
+@@ -779,12 +785,31 @@ static void adm5120_switch_set_vlan_port
+ 
+ /* ------------------------------------------------------------------------ */
+ 
++#ifdef CONFIG_ADM5120_SWITCH_NAPI
++static inline void adm5120_if_napi_enable(struct net_device *dev)
++{
++      struct adm5120_if_priv *priv = netdev_priv(dev);
++      napi_enable(&priv->napi);
++}
++
++static inline void adm5120_if_napi_disable(struct net_device *dev)
++{
++      struct adm5120_if_priv *priv = netdev_priv(dev);
++      napi_disable(&priv->napi);
++}
++#else
++static inline void adm5120_if_napi_enable(struct net_device *dev) {}
++static inline void adm5120_if_napi_disable(struct net_device *dev) {}
++#endif /* CONFIG_ADM5120_SWITCH_NAPI */
++
+ static int adm5120_if_open(struct net_device *dev)
+ {
+       u32 t;
+       int err;
+       int i;
+ 
++      adm5120_if_napi_enable(dev);
++
+       err = request_irq(dev->irq, adm5120_switch_irq,
+               (IRQF_SHARED | IRQF_DISABLED), dev->name, dev);
+       if (err) {
+@@ -809,6 +834,7 @@ static int adm5120_if_open(struct net_de
+       return 0;
+ 
+ err:
++      adm5120_if_napi_disable(dev);
+       return err;
+ }
+ 
+@@ -818,6 +844,7 @@ static int adm5120_if_stop(struct net_de
+       int i;
+ 
+       netif_stop_queue(dev);
++      adm5120_if_napi_disable(dev);
+ 
+       /* disable port if not assigned to other devices */
+       t = sw_read_reg(SWITCH_REG_PORT_CONF0);
+@@ -1001,6 +1028,9 @@ static struct net_device *adm5120_if_all
+       if (!dev)
+               return NULL;
+ 
++      priv = netdev_priv(dev);
++      priv->dev = dev;
++
+       dev->irq                = ADM5120_IRQ_SWITCH;
+       dev->open               = adm5120_if_open;
+       dev->hard_start_xmit    = adm5120_if_hard_start_xmit;
+@@ -1010,13 +1040,11 @@ static struct net_device *adm5120_if_all
+       dev->tx_timeout         = adm5120_if_tx_timeout;
+       dev->watchdog_timeo     = TX_TIMEOUT;
+       dev->set_mac_address    = adm5120_if_set_mac_address;
++
+ #ifdef CONFIG_ADM5120_SWITCH_NAPI
+-      dev->poll               = adm5120_if_poll;
+-      dev->weight             = 64;
++      netif_napi_add(dev, &priv->napi, adm5120_if_poll, 64);
+ #endif
+ 
+-      SET_MODULE_OWNER(dev);
+-
+       return dev;
+ }
+