/* SPDX-License-Identifier: GPL-2.0-only */ /* * * Copyright (c) 2011, Microsoft Corporation. * * Authors: * Haiyang Zhang <[email protected]> * Hank Janssen <[email protected]> * K. Y. Srinivasan <[email protected]> */ #ifndef _HYPERV_VMBUS_H #define _HYPERV_VMBUS_H #include <linux/list.h> #include <linux/bitops.h> #include <asm/sync_bitops.h> #include <asm/hyperv-tlfs.h> #include <linux/atomic.h> #include <linux/hyperv.h> #include <linux/interrupt.h> #include "hv_trace.h" /* * Timeout for services such as KVP and fcopy. */ #define HV_UTIL_TIMEOUT … /* * Timeout for guest-host handshake for services. */ #define HV_UTIL_NEGO_TIMEOUT … /* Definitions for the monitored notification facility */ hv_monitor_trigger_group; struct hv_monitor_parameter { … }; hv_monitor_trigger_state; /* struct hv_monitor_page Layout */ /* ------------------------------------------------------ */ /* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */ /* | 8 | TriggerGroup[0] | */ /* | 10 | TriggerGroup[1] | */ /* | 18 | TriggerGroup[2] | */ /* | 20 | TriggerGroup[3] | */ /* | 28 | Rsvd2[0] | */ /* | 30 | Rsvd2[1] | */ /* | 38 | Rsvd2[2] | */ /* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */ /* | ... | */ /* | 240 | Latency[0][0..3] | */ /* | 340 | Rsvz3[0] | */ /* | 440 | Parameter[0][0] | */ /* | 448 | Parameter[0][1] | */ /* | ... | */ /* | 840 | Rsvd4[0] | */ /* ------------------------------------------------------ */ struct hv_monitor_page { … }; #define HV_HYPERCALL_PARAM_ALIGN … /* Definition of the hv_post_message hypercall input structure. */ struct hv_input_post_message { … }; enum { … }; /* * Per cpu state for channel handling */ struct hv_per_cpu_context { … }; struct hv_context { … }; extern struct hv_context hv_context; /* Hv Interface */ extern int hv_init(void); extern int hv_post_message(union hv_connection_id connection_id, enum hv_message_type message_type, void *payload, size_t payload_size); extern int hv_synic_alloc(void); extern void hv_synic_free(void); extern void hv_synic_enable_regs(unsigned int cpu); extern int hv_synic_init(unsigned int cpu); extern void hv_synic_disable_regs(unsigned int cpu); extern int hv_synic_cleanup(unsigned int cpu); /* Interface */ void hv_ringbuffer_pre_init(struct vmbus_channel *channel); int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, struct page *pages, u32 pagecnt, u32 max_pkt_size); void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); int hv_ringbuffer_write(struct vmbus_channel *channel, const struct kvec *kv_list, u32 kv_count, u64 requestid, u64 *trans_id); int hv_ringbuffer_read(struct vmbus_channel *channel, void *buffer, u32 buflen, u32 *buffer_actual_len, u64 *requestid, bool raw); /* * The Maximum number of channels (16384) is determined by the size of the * interrupt page, which is HV_HYP_PAGE_SIZE. 1/2 of HV_HYP_PAGE_SIZE is to * send endpoint interrupts, and the other is to receive endpoint interrupts. */ #define MAX_NUM_CHANNELS … /* The value here must be in multiple of 32 */ #define MAX_NUM_CHANNELS_SUPPORTED … #define MAX_CHANNEL_RELIDS … enum vmbus_connect_state { … }; #define MAX_SIZE_CHANNEL_MESSAGE … /* * The CPU that Hyper-V will interrupt for VMBUS messages, such as * CHANNELMSG_OFFERCHANNEL and CHANNELMSG_RESCIND_CHANNELOFFER. */ #define VMBUS_CONNECT_CPU … struct vmbus_connection { … }; struct vmbus_msginfo { … }; extern struct vmbus_connection vmbus_connection; int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version); static inline void vmbus_send_interrupt(u32 relid) { … } enum vmbus_message_handler_type { … }; struct vmbus_channel_message_table_entry { … }; extern const struct vmbus_channel_message_table_entry channel_message_table[CHANNELMSG_COUNT]; /* General vmbus interface */ struct hv_device *vmbus_device_create(const guid_t *type, const guid_t *instance, struct vmbus_channel *channel); int vmbus_device_register(struct hv_device *child_device_obj); void vmbus_device_unregister(struct hv_device *device_obj); int vmbus_add_channel_kobj(struct hv_device *device_obj, struct vmbus_channel *channel); void vmbus_remove_channel_attr_group(struct vmbus_channel *channel); void vmbus_channel_map_relid(struct vmbus_channel *channel); void vmbus_channel_unmap_relid(struct vmbus_channel *channel); struct vmbus_channel *relid2channel(u32 relid); void vmbus_free_channels(void); /* Connection interface */ int vmbus_connect(void); void vmbus_disconnect(void); int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep); void vmbus_on_event(unsigned long data); void vmbus_on_msg_dpc(unsigned long data); int hv_kvp_init(struct hv_util_service *srv); void hv_kvp_deinit(void); int hv_kvp_pre_suspend(void); int hv_kvp_pre_resume(void); void hv_kvp_onchannelcallback(void *context); int hv_vss_init(struct hv_util_service *srv); void hv_vss_deinit(void); int hv_vss_pre_suspend(void); int hv_vss_pre_resume(void); void hv_vss_onchannelcallback(void *context); void vmbus_initiate_unload(bool crash); static inline void hv_poll_channel(struct vmbus_channel *channel, void (*cb)(void *)) { … } enum hvutil_device_state { … }; enum delay { … }; extern const struct vmbus_device vmbus_devs[]; static inline bool hv_is_perf_channel(struct vmbus_channel *channel) { … } static inline size_t hv_dev_ring_size(struct vmbus_channel *channel) { … } static inline bool hv_is_allocated_cpu(unsigned int cpu) { … } static inline void hv_set_allocated_cpu(unsigned int cpu) { … } static inline void hv_clear_allocated_cpu(unsigned int cpu) { … } static inline void hv_update_allocated_cpus(unsigned int old_cpu, unsigned int new_cpu) { … } #ifdef CONFIG_HYPERV_TESTING int hv_debug_add_dev_dir(struct hv_device *dev); void hv_debug_rm_dev_dir(struct hv_device *dev); void hv_debug_rm_all_dir(void); int hv_debug_init(void); void hv_debug_delay_test(struct vmbus_channel *channel, enum delay delay_type); #else /* CONFIG_HYPERV_TESTING */ static inline void hv_debug_rm_dev_dir(struct hv_device *dev) {}; static inline void hv_debug_rm_all_dir(void) {}; static inline void hv_debug_delay_test(struct vmbus_channel *channel, enum delay delay_type) {}; static inline int hv_debug_init(void) { return -1; } static inline int hv_debug_add_dev_dir(struct hv_device *dev) { return -1; } #endif /* CONFIG_HYPERV_TESTING */ #endif /* _HYPERV_VMBUS_H */
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