Re: [RFC PATCH 34/35] Add the Xen virtual network device driver.
- From: Stephen Hemminger <shemminger@xxxxxxxx>
- Date: Tue, 9 May 2006 11:56:33 -0700
The stuff in /proc could easily just be added attributes to the class_device kobject
of the net device (and then show up in sysfs).
+
+#define GRANT_INVALID_REF 0
+
+#define NET_TX_RING_SIZE __RING_SIZE((struct netif_tx_sring *)0, PAGE_SIZE)
+#define NET_RX_RING_SIZE __RING_SIZE((struct netif_rx_sring *)0, PAGE_SIZE)
+
+static inline void init_skb_shinfo(struct sk_buff *skb)
+{
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->frag_list = NULL;
+}
+
Could you use existing sk_buff_head instead of inventing your
own skb queue?
+struct netfront_info
+{
+ struct list_head list;
+ struct net_device *netdev;
+
+ struct net_device_stats stats;
+ unsigned int tx_full;
+
+ struct netif_tx_front_ring tx;
+ struct netif_rx_front_ring rx;
+
+ spinlock_t tx_lock;
+ spinlock_t rx_lock;
+
+ unsigned int handle;
+ unsigned int evtchn, irq;
+
+ /* What is the status of our connection to the remote backend? */
+#define BEST_CLOSED 0
+#define BEST_DISCONNECTED 1
+#define BEST_CONNECTED 2
+ unsigned int backend_state;
+
+ /* Is this interface open or closed (down or up)? */
+#define UST_CLOSED 0
+#define UST_OPEN 1
+ unsigned int user_state;
+
+ /* Receive-ring batched refills. */
+#define RX_MIN_TARGET 8
+#define RX_DFL_MIN_TARGET 64
+#define RX_MAX_TARGET NET_RX_RING_SIZE
+ int rx_min_target, rx_max_target, rx_target;
+ struct sk_buff_head rx_batch;
+
+ struct timer_list rx_refill_timer;
+
+ /*
+ * {tx,rx}_skbs store outstanding skbuffs. The first entry in each
+ * array is an index into a chain of free entries.
+ */
+ struct sk_buff *tx_skbs[NET_TX_RING_SIZE+1];
+ struct sk_buff *rx_skbs[NET_RX_RING_SIZE+1];
+
+ grant_ref_t gref_tx_head;
+ grant_ref_t grant_tx_ref[NET_TX_RING_SIZE + 1];
+ grant_ref_t gref_rx_head;
+ grant_ref_t grant_rx_ref[NET_TX_RING_SIZE + 1];
+
+ struct xenbus_device *xbdev;
+ int tx_ring_ref;
+ int rx_ring_ref;
+ u8 mac[ETH_ALEN];
Isn't mac address already stored in dev->dev_addr and/or dev->perm_addr?
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