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Diffstat (limited to 'drivers/net/ethernet/sun/sunvnet_common.h')
-rw-r--r--drivers/net/ethernet/sun/sunvnet_common.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sun/sunvnet_common.h b/drivers/net/ethernet/sun/sunvnet_common.h
new file mode 100644
index 000000000..5416a3cb9
--- /dev/null
+++ b/drivers/net/ethernet/sun/sunvnet_common.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SUNVNETCOMMON_H
+#define _SUNVNETCOMMON_H
+
+#include <linux/interrupt.h>
+
+/* length of time (or less) we expect pending descriptors to be marked
+ * as VIO_DESC_DONE and skbs ready to be freed
+ */
+#define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1)
+
+#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN)
+#define VNET_TX_RING_SIZE 512
+#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
+
+#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */
+#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */
+
+#define VNET_MAX_MTU 65535
+
+/* VNET packets are sent in buffers with the first 6 bytes skipped
+ * so that after the ethernet header the IPv4/IPv6 headers are aligned
+ * properly.
+ */
+#define VNET_PACKET_SKIP 6
+
+#define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1)
+
+#define VNET_MAX_TXQS 16
+
+struct vnet_tx_entry {
+ struct sk_buff *skb;
+ unsigned int ncookies;
+ struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
+};
+
+struct vnet;
+
+struct vnet_port_stats {
+ /* keep them all the same size */
+ u32 rx_bytes;
+ u32 tx_bytes;
+ u32 rx_packets;
+ u32 tx_packets;
+ u32 event_up;
+ u32 event_reset;
+ u32 q_placeholder;
+};
+
+#define NUM_VNET_PORT_STATS (sizeof(struct vnet_port_stats) / sizeof(u32))
+
+/* Structure to describe a vnet-port or vsw-port in the MD.
+ * If the vsw bit is set, this structure represents a vswitch
+ * port, and the net_device can be found from ->dev. If the
+ * vsw bit is not set, the net_device is available from ->vp->dev.
+ * See the VNET_PORT_TO_NET_DEVICE macro below.
+ */
+struct vnet_port {
+ struct vio_driver_state vio;
+
+ struct vnet_port_stats stats;
+
+ struct hlist_node hash;
+ u8 raddr[ETH_ALEN];
+ unsigned switch_port:1;
+ unsigned tso:1;
+ unsigned vsw:1;
+ unsigned __pad:13;
+
+ struct vnet *vp;
+ struct net_device *dev;
+
+ struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];
+
+ struct list_head list;
+
+ u32 stop_rx_idx;
+ bool stop_rx;
+ bool start_cons;
+
+ struct timer_list clean_timer;
+
+ u64 rmtu;
+ u16 tsolen;
+
+ struct napi_struct napi;
+ u32 napi_stop_idx;
+ bool napi_resume;
+ int rx_event;
+ u16 q_index;
+};
+
+static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
+{
+ return container_of(vio, struct vnet_port, vio);
+}
+
+#define VNET_PORT_HASH_SIZE 16
+#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
+
+static inline unsigned int vnet_hashfn(u8 *mac)
+{
+ unsigned int val = mac[4] ^ mac[5];
+
+ return val & (VNET_PORT_HASH_MASK);
+}
+
+struct vnet_mcast_entry {
+ u8 addr[ETH_ALEN];
+ u8 sent;
+ u8 hit;
+ struct vnet_mcast_entry *next;
+};
+
+struct vnet {
+ spinlock_t lock; /* Protects port_list and port_hash. */
+ struct net_device *dev;
+ u32 msg_enable;
+ u8 q_used[VNET_MAX_TXQS];
+ struct list_head port_list;
+ struct hlist_head port_hash[VNET_PORT_HASH_SIZE];
+ struct vnet_mcast_entry *mcast_list;
+ struct list_head list;
+ u64 local_mac;
+ int nports;
+};
+
+/* Def used by common code to get the net_device from the proper location */
+#define VNET_PORT_TO_NET_DEVICE(__port) \
+ ((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
+
+/* Common funcs */
+void sunvnet_clean_timer_expire_common(struct timer_list *t);
+int sunvnet_open_common(struct net_device *dev);
+int sunvnet_close_common(struct net_device *dev);
+void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
+int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
+void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue);
+netdev_tx_t
+sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
+ struct vnet_port *(*vnet_tx_port)
+ (struct sk_buff *, struct net_device *));
+#ifdef CONFIG_NET_POLL_CONTROLLER
+void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
+#endif
+void sunvnet_event_common(void *arg, int event);
+int sunvnet_send_attr_common(struct vio_driver_state *vio);
+int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
+void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
+int sunvnet_poll_common(struct napi_struct *napi, int budget);
+void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
+void vnet_port_reset(struct vnet_port *port);
+bool sunvnet_port_is_up_common(struct vnet_port *vnet);
+void sunvnet_port_add_txq_common(struct vnet_port *port);
+void sunvnet_port_rm_txq_common(struct vnet_port *port);
+
+#endif /* _SUNVNETCOMMON_H */