/* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation; or, when distributed * separately from the Linux kernel or incorporated into other * software packages, subject to the following license: * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this source file (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #ifndef __XEN_NETBACK__COMMON_H__ #define __XEN_NETBACK__COMMON_H__ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/ip.h> #include <linux/in.h> #include <linux/io.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/wait.h> #include <linux/sched.h> #include <xen/interface/io/netif.h> #include <xen/interface/grant_table.h> #include <xen/grant_table.h> #include <xen/xenbus.h> #include <xen/page.h> #include <linux/debugfs.h> pending_ring_idx_t; struct pending_tx_info { … }; #define XEN_NETIF_TX_RING_SIZE … #define XEN_NETIF_RX_RING_SIZE … struct xenvif_rx_meta { … }; #define GSO_BIT(type) … /* Discriminate from any valid pending_idx value. */ #define INVALID_PENDING_IDX … #define MAX_PENDING_REQS … /* The maximum number of frags is derived from the size of a grant (same * as a Xen page size for now). */ #define MAX_XEN_SKB_FRAGS … #define NETBACK_INVALID_HANDLE … /* To avoid confusion, we define XEN_NETBK_LEGACY_SLOTS_MAX indicating * the maximum slots a valid packet can use. Now this value is defined * to be XEN_NETIF_NR_SLOTS_MIN, which is supposed to be supported by * all backend. */ #define XEN_NETBK_LEGACY_SLOTS_MAX … /* Queue name is interface name with "-qNNN" appended */ #define QUEUE_NAME_SIZE … /* IRQ name is queue name with "-tx" or "-rx" appended */ #define IRQ_NAME_SIZE … struct xenvif; struct xenvif_stats { … }; #define COPY_BATCH_SIZE … struct xenvif_copy_state { … }; struct xenvif_queue { … }; enum state_bit_shift { … }; struct xenvif_mcast_addr { … }; #define XEN_NETBK_MCAST_MAX … #define XEN_NETBK_MAX_HASH_KEY_SIZE … #define XEN_NETBK_MAX_HASH_MAPPING_SIZE … #define XEN_NETBK_HASH_TAG_SIZE … struct xenvif_hash_cache_entry { … }; struct xenvif_hash_cache { … }; struct xenvif_hash { … }; struct backend_info { … }; struct xenvif { … }; struct xenvif_rx_cb { … }; #define XENVIF_RX_CB(skb) … static inline struct xenbus_device *xenvif_to_xenbus_device(struct xenvif *vif) { … } void xenvif_tx_credit_callback(struct timer_list *t); struct xenvif *xenvif_alloc(struct device *parent, domid_t domid, unsigned int handle); int xenvif_init_queue(struct xenvif_queue *queue); void xenvif_deinit_queue(struct xenvif_queue *queue); int xenvif_connect_data(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_data(struct xenvif *vif); int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref, unsigned int evtchn); void xenvif_disconnect_ctrl(struct xenvif *vif); void xenvif_free(struct xenvif *vif); int xenvif_xenbus_init(void); void xenvif_xenbus_fini(void); /* (Un)Map communication rings. */ void xenvif_unmap_frontend_data_rings(struct xenvif_queue *queue); int xenvif_map_frontend_data_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_queue *queue); /* Prevent the device from generating any further traffic. */ void xenvif_carrier_off(struct xenvif *vif); int xenvif_tx_action(struct xenvif_queue *queue, int budget); int xenvif_kthread_guest_rx(void *data); void xenvif_kick_thread(struct xenvif_queue *queue); int xenvif_dealloc_kthread(void *data); irqreturn_t xenvif_ctrl_irq_fn(int irq, void *data); bool xenvif_have_rx_work(struct xenvif_queue *queue, bool test_kthread); bool xenvif_rx_queue_tail(struct xenvif_queue *queue, struct sk_buff *skb); void xenvif_carrier_on(struct xenvif *vif); /* Callbacks from stack when TX packet can be released */ extern const struct ubuf_info_ops xenvif_ubuf_ops; static inline pending_ring_idx_t nr_pending_reqs(struct xenvif_queue *queue) { … } irqreturn_t xenvif_interrupt(int irq, void *dev_id); extern bool separate_tx_rx_irq; extern bool provides_xdp_headroom; extern unsigned int rx_drain_timeout_msecs; extern unsigned int rx_stall_timeout_msecs; extern unsigned int xenvif_max_queues; extern unsigned int xenvif_hash_cache_size; #ifdef CONFIG_DEBUG_FS extern struct dentry *xen_netback_dbg_root; #endif void xenvif_skb_zerocopy_prepare(struct xenvif_queue *queue, struct sk_buff *skb); void xenvif_skb_zerocopy_complete(struct xenvif_queue *queue); /* Multicast control */ bool xenvif_mcast_match(struct xenvif *vif, const u8 *addr); void xenvif_mcast_addr_list_free(struct xenvif *vif); /* Hash */ void xenvif_init_hash(struct xenvif *vif); void xenvif_deinit_hash(struct xenvif *vif); u32 xenvif_set_hash_alg(struct xenvif *vif, u32 alg); u32 xenvif_get_hash_flags(struct xenvif *vif, u32 *flags); u32 xenvif_set_hash_flags(struct xenvif *vif, u32 flags); u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len); u32 xenvif_set_hash_mapping_size(struct xenvif *vif, u32 size); u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len, u32 off); void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb); #ifdef CONFIG_DEBUG_FS void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m); #endif #endif /* __XEN_NETBACK__COMMON_H__ */
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