diff options
Diffstat (limited to 'drivers/net/xen-netback/common.h')
| -rw-r--r-- | drivers/net/xen-netback/common.h | 107 |
1 files changed, 72 insertions, 35 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 0d4a285cbd7e..4dd7c4a1923b 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -99,22 +99,43 @@ struct xenvif_rx_meta { */ #define XEN_NETBK_LEGACY_SLOTS_MAX XEN_NETIF_NR_SLOTS_MIN -struct xenvif { - /* Unique identifier for this interface. */ - domid_t domid; - unsigned int handle; +/* Queue name is interface name with "-qNNN" appended */ +#define QUEUE_NAME_SIZE (IFNAMSIZ + 5) - /* Is this interface disabled? True when backend discovers - * frontend is rogue. +/* IRQ name is queue name with "-tx" or "-rx" appended */ +#define IRQ_NAME_SIZE (QUEUE_NAME_SIZE + 3) + +struct xenvif; + +struct xenvif_stats { + /* Stats fields to be updated per-queue. + * A subset of struct net_device_stats that contains only the + * fields that are updated in netback.c for each queue. */ - bool disabled; + unsigned int rx_bytes; + unsigned int rx_packets; + unsigned int tx_bytes; + unsigned int tx_packets; + + /* Additional stats used by xenvif */ + unsigned long rx_gso_checksum_fixup; + unsigned long tx_zerocopy_sent; + unsigned long tx_zerocopy_success; + unsigned long tx_zerocopy_fail; + unsigned long tx_frag_overflow; +}; + +struct xenvif_queue { /* Per-queue data for xenvif */ + unsigned int id; /* Queue ID, 0-based */ + char name[QUEUE_NAME_SIZE]; /* DEVNAME-qN */ + struct xenvif *vif; /* Parent VIF */ /* Use NAPI for guest TX */ struct napi_struct napi; /* When feature-split-event-channels = 0, tx_irq = rx_irq. */ unsigned int tx_irq; /* Only used when feature-split-event-channels = 1 */ - char tx_irq_name[IFNAMSIZ+4]; /* DEVNAME-tx */ + char tx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-tx */ struct xen_netif_tx_back_ring tx; struct sk_buff_head tx_queue; struct page *mmap_pages[MAX_PENDING_REQS]; @@ -150,7 +171,7 @@ struct xenvif { /* When feature-split-event-channels = 0, tx_irq = rx_irq. */ unsigned int rx_irq; /* Only used when feature-split-event-channels = 1 */ - char rx_irq_name[IFNAMSIZ+4]; /* DEVNAME-rx */ + char rx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-rx */ struct xen_netif_rx_back_ring rx; struct sk_buff_head rx_queue; RING_IDX rx_last_skb_slots; @@ -158,14 +179,29 @@ struct xenvif { struct timer_list wake_queue; - /* This array is allocated seperately as it is large */ - struct gnttab_copy *grant_copy_op; + struct gnttab_copy grant_copy_op[MAX_GRANT_COPY_OPS]; /* We create one meta structure per ring request we consume, so * the maximum number is the same as the ring size. */ struct xenvif_rx_meta meta[XEN_NETIF_RX_RING_SIZE]; + /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */ + unsigned long credit_bytes; + unsigned long credit_usec; + unsigned long remaining_credit; + struct timer_list credit_timeout; + u64 credit_window_start; + + /* Statistics */ + struct xenvif_stats stats; +}; + +struct xenvif { + /* Unique identifier for this interface. */ + domid_t domid; + unsigned int handle; + u8 fe_dev_addr[6]; /* Frontend feature information. */ @@ -179,19 +215,13 @@ struct xenvif { /* Internal feature information. */ u8 can_queue:1; /* can queue packets for receiver? */ - /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */ - unsigned long credit_bytes; - unsigned long credit_usec; - unsigned long remaining_credit; - struct timer_list credit_timeout; - u64 credit_window_start; + /* Is this interface disabled? True when backend discovers + * frontend is rogue. + */ + bool disabled; - /* Statistics */ - unsigned long rx_gso_checksum_fixup; - unsigned long tx_zerocopy_sent; - unsigned long tx_zerocopy_success; - unsigned long tx_zerocopy_fail; - unsigned long tx_frag_overflow; + /* Queues */ + struct xenvif_queue *queues; /* Miscellaneous private stuff. */ struct net_device *dev; @@ -206,7 +236,10 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid, unsigned int handle); -int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref, +int xenvif_init_queue(struct xenvif_queue *queue); +void xenvif_deinit_queue(struct xenvif_queue *queue); + +int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref, unsigned long rx_ring_ref, unsigned int tx_evtchn, unsigned int rx_evtchn); void xenvif_disconnect(struct xenvif *vif); @@ -217,44 +250,47 @@ void xenvif_xenbus_fini(void); int xenvif_schedulable(struct xenvif *vif); -int xenvif_must_stop_queue(struct xenvif *vif); +int xenvif_must_stop_queue(struct xenvif_queue *queue); + +int xenvif_queue_stopped(struct xenvif_queue *queue); +void xenvif_wake_queue(struct xenvif_queue *queue); /* (Un)Map communication rings. */ -void xenvif_unmap_frontend_rings(struct xenvif *vif); -int xenvif_map_frontend_rings(struct xenvif *vif, +void xenvif_unmap_frontend_rings(struct xenvif_queue *queue); +int xenvif_map_frontend_rings(struct xenvif_queue *queue, grant_ref_t tx_ring_ref, grant_ref_t rx_ring_ref); /* Check for SKBs from frontend and schedule backend processing */ -void xenvif_napi_schedule_or_enable_events(struct xenvif *vif); +void xenvif_napi_schedule_or_enable_events(struct xenvif_queue *queue); /* Prevent the device from generating any further traffic. */ void xenvif_carrier_off(struct xenvif *vif); -int xenvif_tx_action(struct xenvif *vif, int budget); +int xenvif_tx_action(struct xenvif_queue *queue, int budget); int xenvif_kthread_guest_rx(void *data); -void xenvif_kick_thread(struct xenvif *vif); +void xenvif_kick_thread(struct xenvif_queue *queue); int xenvif_dealloc_kthread(void *data); /* Determine whether the needed number of slots (req) are available, * and set req_event if not. */ -bool xenvif_rx_ring_slots_available(struct xenvif *vif, int needed); +bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue, int needed); -void xenvif_stop_queue(struct xenvif *vif); +void xenvif_carrier_on(struct xenvif *vif); /* Callback from stack when TX packet can be released */ void xenvif_zerocopy_callback(struct ubuf_info *ubuf, bool zerocopy_success); /* Unmap a pending page and release it back to the guest */ -void xenvif_idx_unmap(struct xenvif *vif, u16 pending_idx); +void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx); -static inline pending_ring_idx_t nr_pending_reqs(struct xenvif *vif) +static inline pending_ring_idx_t nr_pending_reqs(struct xenvif_queue *queue) { return MAX_PENDING_REQS - - vif->pending_prod + vif->pending_cons; + queue->pending_prod + queue->pending_cons; } /* Callback from stack when TX packet can be released */ @@ -264,5 +300,6 @@ extern bool separate_tx_rx_irq; extern unsigned int rx_drain_timeout_msecs; extern unsigned int rx_drain_timeout_jiffies; +extern unsigned int xenvif_max_queues; #endif /* __XEN_NETBACK__COMMON_H__ */ |