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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1d311ad2f9
At the tail of vnet_event(), if we hit the maybe_tx_wakeup() condition, we try to take the netif_tx_lock() in the recv-interrupt-context and can deadlock with dev_watchdog(). vnet_event() should schedule maybe_tx_wakeup() as a tasklet to avoid this deadlock Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
#ifndef _SUNVNET_H
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#define _SUNVNET_H
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#include <linux/interrupt.h>
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#define DESC_NCOOKIES(entry_size) \
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((entry_size) - sizeof(struct vio_net_desc))
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/* length of time before we decide the hardware is borked,
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* and dev->tx_timeout() should be called to fix the problem
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*/
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#define VNET_TX_TIMEOUT (5 * HZ)
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#define VNET_TX_RING_SIZE 512
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#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
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/* VNET packets are sent in buffers with the first 6 bytes skipped
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* so that after the ethernet header the IPv4/IPv6 headers are aligned
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* properly.
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*/
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#define VNET_PACKET_SKIP 6
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struct vnet_tx_entry {
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void *buf;
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unsigned int ncookies;
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struct ldc_trans_cookie cookies[2];
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};
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struct vnet;
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struct vnet_port {
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struct vio_driver_state vio;
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struct hlist_node hash;
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u8 raddr[ETH_ALEN];
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u8 switch_port;
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u8 __pad;
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struct vnet *vp;
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struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];
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struct list_head list;
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};
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static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
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{
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return container_of(vio, struct vnet_port, vio);
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}
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#define VNET_PORT_HASH_SIZE 16
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#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
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static inline unsigned int vnet_hashfn(u8 *mac)
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{
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unsigned int val = mac[4] ^ mac[5];
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return val & (VNET_PORT_HASH_MASK);
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}
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struct vnet_mcast_entry {
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u8 addr[ETH_ALEN];
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u8 sent;
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u8 hit;
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struct vnet_mcast_entry *next;
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};
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struct vnet {
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/* Protects port_list and port_hash. */
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spinlock_t lock;
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struct net_device *dev;
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u32 msg_enable;
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struct list_head port_list;
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struct hlist_head port_hash[VNET_PORT_HASH_SIZE];
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struct vnet_mcast_entry *mcast_list;
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struct list_head list;
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u64 local_mac;
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struct tasklet_struct vnet_tx_wakeup;
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};
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#endif /* _SUNVNET_H */
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