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freebsd-dev/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
Wei Hu da2f98a1cf Microsoft vmbus, storage and other related driver enhancements for HyperV. 
- Vmbus multi channel support.
    - Vector interrupt support.
    - Signal optimization.
    - Storvsc driver performance improvement.
    - Scatter and gather support for storvsc driver.
    - Minor bug fix for KVP driver.
Thanks royger, jhb and delphij from FreeBSD community for the reviews
and comments. Also thanks Hovy Xu from NetApp for the contributions to
the storvsc driver.

PR:     195238
Submitted by:   whu
Reviewed by:    royger, jhb, delphij
Approved by:    royger
MFC after:      2 weeks
Relnotes:       yes
Sponsored by:   Microsoft OSTC
2015-04-29 10:12:34 +00:00

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/*-
* Copyright (c) 2009-2012 Microsoft Corp.
* Copyright (c) 2012 NetApp Inc.
* Copyright (c) 2012 Citrix Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef __HYPERV_PRIV_H__
#define __HYPERV_PRIV_H__
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sema.h>
#include <dev/hyperv/include/hyperv.h>
/*
* Status codes for hypervisor operations.
*/
typedef uint16_t hv_vmbus_status;
#define HV_MESSAGE_SIZE (256)
#define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240)
#define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30)
#define HV_ANY_VP (0xFFFFFFFF)
/*
* Synthetic interrupt controller flag constants.
*/
#define HV_EVENT_FLAGS_COUNT (256 * 8)
#define HV_EVENT_FLAGS_BYTE_COUNT (256)
#define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(uint32_t))
/*
* MessageId: HV_STATUS_INSUFFICIENT_BUFFERS
* MessageText:
* You did not supply enough message buffers to send a message.
*/
#define HV_STATUS_INSUFFICIENT_BUFFERS ((uint16_t)0x0013)
typedef void (*hv_vmbus_channel_callback)(void *context);
typedef struct {
void* data;
uint32_t length;
} hv_vmbus_sg_buffer_list;
typedef struct {
uint32_t current_interrupt_mask;
uint32_t current_read_index;
uint32_t current_write_index;
uint32_t bytes_avail_to_read;
uint32_t bytes_avail_to_write;
} hv_vmbus_ring_buffer_debug_info;
typedef struct {
uint32_t rel_id;
hv_vmbus_channel_state state;
hv_guid interface_type;
hv_guid interface_instance;
uint32_t monitor_id;
uint32_t server_monitor_pending;
uint32_t server_monitor_latency;
uint32_t server_monitor_connection_id;
uint32_t client_monitor_pending;
uint32_t client_monitor_latency;
uint32_t client_monitor_connection_id;
hv_vmbus_ring_buffer_debug_info inbound;
hv_vmbus_ring_buffer_debug_info outbound;
} hv_vmbus_channel_debug_info;
typedef union {
hv_vmbus_channel_version_supported version_supported;
hv_vmbus_channel_open_result open_result;
hv_vmbus_channel_gpadl_torndown gpadl_torndown;
hv_vmbus_channel_gpadl_created gpadl_created;
hv_vmbus_channel_version_response version_response;
} hv_vmbus_channel_msg_response;
/*
* Represents each channel msg on the vmbus connection
* This is a variable-size data structure depending on
* the msg type itself
*/
typedef struct hv_vmbus_channel_msg_info {
/*
* Bookkeeping stuff
*/
TAILQ_ENTRY(hv_vmbus_channel_msg_info) msg_list_entry;
/*
* So far, this is only used to handle
* gpadl body message
*/
TAILQ_HEAD(, hv_vmbus_channel_msg_info) sub_msg_list_anchor;
/*
* Synchronize the request/response if
* needed.
* KYS: Use a semaphore for now.
* Not perf critical.
*/
struct sema wait_sema;
hv_vmbus_channel_msg_response response;
uint32_t message_size;
/**
* The channel message that goes out on
* the "wire". It will contain at
* minimum the
* hv_vmbus_channel_msg_header
* header.
*/
unsigned char msg[0];
} hv_vmbus_channel_msg_info;
/*
* The format must be the same as hv_vm_data_gpa_direct
*/
typedef struct hv_vmbus_channel_packet_page_buffer {
uint16_t type;
uint16_t data_offset8;
uint16_t length8;
uint16_t flags;
uint64_t transaction_id;
uint32_t reserved;
uint32_t range_count;
hv_vmbus_page_buffer range[HV_MAX_PAGE_BUFFER_COUNT];
} __packed hv_vmbus_channel_packet_page_buffer;
/*
* The format must be the same as hv_vm_data_gpa_direct
*/
typedef struct hv_vmbus_channel_packet_multipage_buffer {
uint16_t type;
uint16_t data_offset8;
uint16_t length8;
uint16_t flags;
uint64_t transaction_id;
uint32_t reserved;
uint32_t range_count; /* Always 1 in this case */
hv_vmbus_multipage_buffer range;
} __packed hv_vmbus_channel_packet_multipage_buffer;
enum {
HV_VMBUS_MESSAGE_CONNECTION_ID = 1,
HV_VMBUS_MESSAGE_PORT_ID = 1,
HV_VMBUS_EVENT_CONNECTION_ID = 2,
HV_VMBUS_EVENT_PORT_ID = 2,
HV_VMBUS_MONITOR_CONNECTION_ID = 3,
HV_VMBUS_MONITOR_PORT_ID = 3,
HV_VMBUS_MESSAGE_SINT = 2
};
#define HV_PRESENT_BIT 0x80000000
#define HV_HYPERCALL_PARAM_ALIGN sizeof(uint64_t)
typedef struct {
uint64_t guest_id;
void* hypercall_page;
hv_bool_uint8_t syn_ic_initialized;
hv_vmbus_handle syn_ic_msg_page[MAXCPU];
hv_vmbus_handle syn_ic_event_page[MAXCPU];
/*
* For FreeBSD cpuid to Hyper-V vcpuid mapping.
*/
uint32_t hv_vcpu_index[MAXCPU];
/*
* Each cpu has its own software interrupt handler for channel
* event and msg handling.
*/
struct intr_event *hv_event_intr_event[MAXCPU];
struct intr_event *hv_msg_intr_event[MAXCPU];
void *event_swintr[MAXCPU];
void *msg_swintr[MAXCPU];
/*
* Host use this vector to intrrupt guest for vmbus channel
* event and msg.
*/
unsigned int hv_cb_vector;
} hv_vmbus_context;
/*
* Define hypervisor message types
*/
typedef enum {
HV_MESSAGE_TYPE_NONE = 0x00000000,
/*
* Memory access messages
*/
HV_MESSAGE_TYPE_UNMAPPED_GPA = 0x80000000,
HV_MESSAGE_TYPE_GPA_INTERCEPT = 0x80000001,
/*
* Timer notification messages
*/
HV_MESSAGE_TIMER_EXPIRED = 0x80000010,
/*
* Error messages
*/
HV_MESSAGE_TYPE_INVALID_VP_REGISTER_VALUE = 0x80000020,
HV_MESSAGE_TYPE_UNRECOVERABLE_EXCEPTION = 0x80000021,
HV_MESSAGE_TYPE_UNSUPPORTED_FEATURE = 0x80000022,
/*
* Trace buffer complete messages
*/
HV_MESSAGE_TYPE_EVENT_LOG_BUFFER_COMPLETE = 0x80000040,
/*
* Platform-specific processor intercept messages
*/
HV_MESSAGE_TYPE_X64_IO_PORT_INTERCEPT = 0x80010000,
HV_MESSAGE_TYPE_X64_MSR_INTERCEPT = 0x80010001,
HV_MESSAGE_TYPE_X64_CPU_INTERCEPT = 0x80010002,
HV_MESSAGE_TYPE_X64_EXCEPTION_INTERCEPT = 0x80010003,
HV_MESSAGE_TYPE_X64_APIC_EOI = 0x80010004,
HV_MESSAGE_TYPE_X64_LEGACY_FP_ERROR = 0x80010005
} hv_vmbus_msg_type;
/*
* Define port identifier type
*/
typedef union _hv_vmbus_port_id {
uint32_t as_uint32_t;
struct {
uint32_t id:24;
uint32_t reserved:8;
} u ;
} hv_vmbus_port_id;
/*
* Define synthetic interrupt controller message flag
*/
typedef union {
uint8_t as_uint8_t;
struct {
uint8_t message_pending:1;
uint8_t reserved:7;
} u;
} hv_vmbus_msg_flags;
typedef uint64_t hv_vmbus_partition_id;
/*
* Define synthetic interrupt controller message header
*/
typedef struct {
hv_vmbus_msg_type message_type;
uint8_t payload_size;
hv_vmbus_msg_flags message_flags;
uint8_t reserved[2];
union {
hv_vmbus_partition_id sender;
hv_vmbus_port_id port;
} u;
} hv_vmbus_msg_header;
/*
* Define synthetic interrupt controller message format
*/
typedef struct {
hv_vmbus_msg_header header;
union {
uint64_t payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
} u ;
} hv_vmbus_message;
/*
* Maximum channels is determined by the size of the interrupt
* page which is PAGE_SIZE. 1/2 of PAGE_SIZE is for
* send endpoint interrupt and the other is receive
* endpoint interrupt.
*
* Note: (PAGE_SIZE >> 1) << 3 allocates 16348 channels
*/
#define HV_MAX_NUM_CHANNELS (PAGE_SIZE >> 1) << 3
/*
* (The value here must be in multiple of 32)
*/
#define HV_MAX_NUM_CHANNELS_SUPPORTED 256
/*
* VM Bus connection states
*/
typedef enum {
HV_DISCONNECTED,
HV_CONNECTING,
HV_CONNECTED,
HV_DISCONNECTING
} hv_vmbus_connect_state;
#define HV_MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
typedef struct {
hv_vmbus_connect_state connect_state;
uint32_t next_gpadl_handle;
/**
* Represents channel interrupts. Each bit position
* represents a channel.
* When a channel sends an interrupt via VMBUS, it
* finds its bit in the send_interrupt_page, set it and
* calls Hv to generate a port event. The other end
* receives the port event and parse the
* recv_interrupt_page to see which bit is set
*/
void *interrupt_page;
void *send_interrupt_page;
void *recv_interrupt_page;
/*
* 2 pages - 1st page for parent->child
* notification and 2nd is child->parent
* notification
*/
void *monitor_pages;
TAILQ_HEAD(, hv_vmbus_channel_msg_info) channel_msg_anchor;
struct mtx channel_msg_lock;
/**
* List of primary channels. Sub channels will be linked
* under their primary channel.
*/
TAILQ_HEAD(, hv_vmbus_channel) channel_anchor;
struct mtx channel_lock;
hv_vmbus_handle work_queue;
struct sema control_sema;
} hv_vmbus_connection;
/*
* Declare the MSR used to identify the guest OS
*/
#define HV_X64_MSR_GUEST_OS_ID 0x40000000
typedef union {
uint64_t as_uint64_t;
struct {
uint64_t build_number : 16;
uint64_t service_version : 8; /* Service Pack, etc. */
uint64_t minor_version : 8;
uint64_t major_version : 8;
/*
* HV_GUEST_OS_MICROSOFT_IDS (If Vendor=MS)
* HV_GUEST_OS_VENDOR
*/
uint64_t os_id : 8;
uint64_t vendor_id : 16;
} u;
} hv_vmbus_x64_msr_guest_os_id_contents;
/*
* Declare the MSR used to setup pages used to communicate with the hypervisor
*/
#define HV_X64_MSR_HYPERCALL 0x40000001
typedef union {
uint64_t as_uint64_t;
struct {
uint64_t enable :1;
uint64_t reserved :11;
uint64_t guest_physical_address :52;
} u;
} hv_vmbus_x64_msr_hypercall_contents;
typedef union {
uint32_t as_uint32_t;
struct {
uint32_t group_enable :4;
uint32_t rsvd_z :28;
} u;
} hv_vmbus_monitor_trigger_state;
typedef union {
uint64_t as_uint64_t;
struct {
uint32_t pending;
uint32_t armed;
} u;
} hv_vmbus_monitor_trigger_group;
typedef struct {
hv_vmbus_connection_id connection_id;
uint16_t flag_number;
uint16_t rsvd_z;
} hv_vmbus_monitor_parameter;
/*
* hv_vmbus_monitor_page Layout
* ------------------------------------------------------
* | 0 | trigger_state (4 bytes) | Rsvd1 (4 bytes) |
* | 8 | trigger_group[0] |
* | 10 | trigger_group[1] |
* | 18 | trigger_group[2] |
* | 20 | trigger_group[3] |
* | 28 | Rsvd2[0] |
* | 30 | Rsvd2[1] |
* | 38 | Rsvd2[2] |
* | 40 | next_check_time[0][0] | next_check_time[0][1] |
* | ... |
* | 240 | latency[0][0..3] |
* | 340 | Rsvz3[0] |
* | 440 | parameter[0][0] |
* | 448 | parameter[0][1] |
* | ... |
* | 840 | Rsvd4[0] |
* ------------------------------------------------------
*/
typedef struct {
hv_vmbus_monitor_trigger_state trigger_state;
uint32_t rsvd_z1;
hv_vmbus_monitor_trigger_group trigger_group[4];
uint64_t rsvd_z2[3];
int32_t next_check_time[4][32];
uint16_t latency[4][32];
uint64_t rsvd_z3[32];
hv_vmbus_monitor_parameter parameter[4][32];
uint8_t rsvd_z4[1984];
} hv_vmbus_monitor_page;
/*
* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
* is set by CPUID(HV_CPU_ID_FUNCTION_VERSION_AND_FEATURES).
*/
typedef enum {
HV_CPU_ID_FUNCTION_VERSION_AND_FEATURES = 0x00000001,
HV_CPU_ID_FUNCTION_HV_VENDOR_AND_MAX_FUNCTION = 0x40000000,
HV_CPU_ID_FUNCTION_HV_INTERFACE = 0x40000001,
/*
* The remaining functions depend on the value
* of hv_cpu_id_function_interface
*/
HV_CPU_ID_FUNCTION_MS_HV_VERSION = 0x40000002,
HV_CPU_ID_FUNCTION_MS_HV_FEATURES = 0x40000003,
HV_CPU_ID_FUNCTION_MS_HV_ENLIGHTENMENT_INFORMATION = 0x40000004,
HV_CPU_ID_FUNCTION_MS_HV_IMPLEMENTATION_LIMITS = 0x40000005
} hv_vmbus_cpuid_function;
/*
* Define the format of the SIMP register
*/
typedef union {
uint64_t as_uint64_t;
struct {
uint64_t simp_enabled : 1;
uint64_t preserved : 11;
uint64_t base_simp_gpa : 52;
} u;
} hv_vmbus_synic_simp;
/*
* Define the format of the SIEFP register
*/
typedef union {
uint64_t as_uint64_t;
struct {
uint64_t siefp_enabled : 1;
uint64_t preserved : 11;
uint64_t base_siefp_gpa : 52;
} u;
} hv_vmbus_synic_siefp;
/*
* Define synthetic interrupt source
*/
typedef union {
uint64_t as_uint64_t;
struct {
uint64_t vector : 8;
uint64_t reserved1 : 8;
uint64_t masked : 1;
uint64_t auto_eoi : 1;
uint64_t reserved2 : 46;
} u;
} hv_vmbus_synic_sint;
/*
* Define syn_ic control register
*/
typedef union _hv_vmbus_synic_scontrol {
uint64_t as_uint64_t;
struct {
uint64_t enable : 1;
uint64_t reserved : 63;
} u;
} hv_vmbus_synic_scontrol;
/*
* Define the hv_vmbus_post_message hypercall input structure
*/
typedef struct {
hv_vmbus_connection_id connection_id;
uint32_t reserved;
hv_vmbus_msg_type message_type;
uint32_t payload_size;
uint64_t payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
} hv_vmbus_input_post_message;
/*
* Define the synthetic interrupt controller event flags format
*/
typedef union {
uint8_t flags8[HV_EVENT_FLAGS_BYTE_COUNT];
uint32_t flags32[HV_EVENT_FLAGS_DWORD_COUNT];
} hv_vmbus_synic_event_flags;
/* MSR used to provide vcpu index */
#define HV_X64_MSR_VP_INDEX (0x40000002)
/*
* Define synthetic interrupt controller model specific registers
*/
#define HV_X64_MSR_SCONTROL (0x40000080)
#define HV_X64_MSR_SVERSION (0x40000081)
#define HV_X64_MSR_SIEFP (0x40000082)
#define HV_X64_MSR_SIMP (0x40000083)
#define HV_X64_MSR_EOM (0x40000084)
#define HV_X64_MSR_SINT0 (0x40000090)
#define HV_X64_MSR_SINT1 (0x40000091)
#define HV_X64_MSR_SINT2 (0x40000092)
#define HV_X64_MSR_SINT3 (0x40000093)
#define HV_X64_MSR_SINT4 (0x40000094)
#define HV_X64_MSR_SINT5 (0x40000095)
#define HV_X64_MSR_SINT6 (0x40000096)
#define HV_X64_MSR_SINT7 (0x40000097)
#define HV_X64_MSR_SINT8 (0x40000098)
#define HV_X64_MSR_SINT9 (0x40000099)
#define HV_X64_MSR_SINT10 (0x4000009A)
#define HV_X64_MSR_SINT11 (0x4000009B)
#define HV_X64_MSR_SINT12 (0x4000009C)
#define HV_X64_MSR_SINT13 (0x4000009D)
#define HV_X64_MSR_SINT14 (0x4000009E)
#define HV_X64_MSR_SINT15 (0x4000009F)
/*
* Declare the various hypercall operations
*/
typedef enum {
HV_CALL_POST_MESSAGE = 0x005c,
HV_CALL_SIGNAL_EVENT = 0x005d,
} hv_vmbus_call_code;
/**
* Global variables
*/
extern hv_vmbus_context hv_vmbus_g_context;
extern hv_vmbus_connection hv_vmbus_g_connection;
/*
* Private, VM Bus functions
*/
int hv_vmbus_ring_buffer_init(
hv_vmbus_ring_buffer_info *ring_info,
void *buffer,
uint32_t buffer_len);
void hv_ring_buffer_cleanup(
hv_vmbus_ring_buffer_info *ring_info);
int hv_ring_buffer_write(
hv_vmbus_ring_buffer_info *ring_info,
hv_vmbus_sg_buffer_list sg_buffers[],
uint32_t sg_buff_count,
boolean_t *need_sig);
int hv_ring_buffer_peek(
hv_vmbus_ring_buffer_info *ring_info,
void *buffer,
uint32_t buffer_len);
int hv_ring_buffer_read(
hv_vmbus_ring_buffer_info *ring_info,
void *buffer,
uint32_t buffer_len,
uint32_t offset);
uint32_t hv_vmbus_get_ring_buffer_interrupt_mask(
hv_vmbus_ring_buffer_info *ring_info);
void hv_vmbus_dump_ring_info(
hv_vmbus_ring_buffer_info *ring_info,
char *prefix);
void hv_ring_buffer_read_begin(
hv_vmbus_ring_buffer_info *ring_info);
uint32_t hv_ring_buffer_read_end(
hv_vmbus_ring_buffer_info *ring_info);
hv_vmbus_channel* hv_vmbus_allocate_channel(void);
void hv_vmbus_free_vmbus_channel(hv_vmbus_channel *channel);
void hv_vmbus_on_channel_message(void *context);
int hv_vmbus_request_channel_offers(void);
void hv_vmbus_release_unattached_channels(void);
int hv_vmbus_init(void);
void hv_vmbus_cleanup(void);
uint16_t hv_vmbus_post_msg_via_msg_ipc(
hv_vmbus_connection_id connection_id,
hv_vmbus_msg_type message_type,
void *payload,
size_t payload_size);
uint16_t hv_vmbus_signal_event(void *con_id);
void hv_vmbus_synic_init(void *irq_arg);
void hv_vmbus_synic_cleanup(void *arg);
int hv_vmbus_query_hypervisor_presence(void);
struct hv_device* hv_vmbus_child_device_create(
hv_guid device_type,
hv_guid device_instance,
hv_vmbus_channel *channel);
int hv_vmbus_child_device_register(
struct hv_device *child_dev);
int hv_vmbus_child_device_unregister(
struct hv_device *child_dev);
hv_vmbus_channel* hv_vmbus_get_channel_from_rel_id(uint32_t rel_id);
/**
* Connection interfaces
*/
int hv_vmbus_connect(void);
int hv_vmbus_disconnect(void);
int hv_vmbus_post_message(void *buffer, size_t buf_size);
int hv_vmbus_set_event(hv_vmbus_channel *channel);
void hv_vmbus_on_events(void *);
/*
* The guest OS needs to register the guest ID with the hypervisor.
* The guest ID is a 64 bit entity and the structure of this ID is
* specified in the Hyper-V specification:
*
* http://msdn.microsoft.com/en-us/library/windows/
* hardware/ff542653%28v=vs.85%29.aspx
*
* While the current guideline does not specify how FreeBSD guest ID(s)
* need to be generated, our plan is to publish the guidelines for
* FreeBSD and other guest operating systems that currently are hosted
* on Hyper-V. The implementation here conforms to this yet
* unpublished guidelines.
*
* Bit(s)
* 63 - Indicates if the OS is Open Source or not; 1 is Open Source
* 62:56 - Os Type; Linux is 0x100, FreeBSD is 0x200
* 55:48 - Distro specific identification
* 47:16 - FreeBSD kernel version number
* 15:0 - Distro specific identification
*
*/
#define HV_FREEBSD_VENDOR_ID 0x8200
#define HV_FREEBSD_GUEST_ID hv_generate_guest_id(0,0)
static inline uint64_t hv_generate_guest_id(
uint8_t distro_id_part1,
uint16_t distro_id_part2)
{
uint64_t guest_id;
guest_id = (((uint64_t)HV_FREEBSD_VENDOR_ID) << 48);
guest_id |= (((uint64_t)(distro_id_part1)) << 48);
guest_id |= (((uint64_t)(__FreeBSD_version)) << 16); /* in param.h */
guest_id |= ((uint64_t)(distro_id_part2));
return guest_id;
}
typedef struct {
unsigned int vector;
void *page_buffers[2 * MAXCPU];
} hv_setup_args;
#endif /* __HYPERV_PRIV_H__ */
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