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/* 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 */
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