| /* |
| * |
| * Copyright (c) 2009, Microsoft Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| * Place - Suite 330, Boston, MA 02111-1307 USA. |
| * |
| * Authors: |
| * Haiyang Zhang <haiyangz@microsoft.com> |
| * Hank Janssen <hjanssen@microsoft.com> |
| * |
| */ |
| |
| |
| #ifndef _CHANNEL_MGMT_H_ |
| #define _CHANNEL_MGMT_H_ |
| |
| #include <linux/list.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| #include "ring_buffer.h" |
| #include "vmbus_channel_interface.h" |
| #include "vmbus_packet_format.h" |
| |
| /* Version 1 messages */ |
| enum vmbus_channel_message_type { |
| CHANNELMSG_INVALID = 0, |
| CHANNELMSG_OFFERCHANNEL = 1, |
| CHANNELMSG_RESCIND_CHANNELOFFER = 2, |
| CHANNELMSG_REQUESTOFFERS = 3, |
| CHANNELMSG_ALLOFFERS_DELIVERED = 4, |
| CHANNELMSG_OPENCHANNEL = 5, |
| CHANNELMSG_OPENCHANNEL_RESULT = 6, |
| CHANNELMSG_CLOSECHANNEL = 7, |
| CHANNELMSG_GPADL_HEADER = 8, |
| CHANNELMSG_GPADL_BODY = 9, |
| CHANNELMSG_GPADL_CREATED = 10, |
| CHANNELMSG_GPADL_TEARDOWN = 11, |
| CHANNELMSG_GPADL_TORNDOWN = 12, |
| CHANNELMSG_RELID_RELEASED = 13, |
| CHANNELMSG_INITIATE_CONTACT = 14, |
| CHANNELMSG_VERSION_RESPONSE = 15, |
| CHANNELMSG_UNLOAD = 16, |
| #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD |
| CHANNELMSG_VIEWRANGE_ADD = 17, |
| CHANNELMSG_VIEWRANGE_REMOVE = 18, |
| #endif |
| CHANNELMSG_COUNT |
| }; |
| |
| struct vmbus_channel_message_header { |
| enum vmbus_channel_message_type msgtype; |
| u32 padding; |
| } __packed; |
| |
| /* Query VMBus Version parameters */ |
| struct vmbus_channel_query_vmbus_version { |
| struct vmbus_channel_message_header header; |
| u32 version; |
| } __packed; |
| |
| /* VMBus Version Supported parameters */ |
| struct vmbus_channel_version_supported { |
| struct vmbus_channel_message_header header; |
| bool version_supported; |
| } __packed; |
| |
| /* Offer Channel parameters */ |
| struct vmbus_channel_offer_channel { |
| struct vmbus_channel_message_header header; |
| struct vmbus_channel_offer offer; |
| u32 child_relid; |
| u8 monitorid; |
| bool monitor_allocated; |
| } __packed; |
| |
| /* Rescind Offer parameters */ |
| struct vmbus_channel_rescind_offer { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| } __packed; |
| |
| /* |
| * Request Offer -- no parameters, SynIC message contains the partition ID |
| * Set Snoop -- no parameters, SynIC message contains the partition ID |
| * Clear Snoop -- no parameters, SynIC message contains the partition ID |
| * All Offers Delivered -- no parameters, SynIC message contains the partition |
| * ID |
| * Flush Client -- no parameters, SynIC message contains the partition ID |
| */ |
| |
| /* Open Channel parameters */ |
| struct vmbus_channel_open_channel { |
| struct vmbus_channel_message_header header; |
| |
| /* Identifies the specific VMBus channel that is being opened. */ |
| u32 child_relid; |
| |
| /* ID making a particular open request at a channel offer unique. */ |
| u32 openid; |
| |
| /* GPADL for the channel's ring buffer. */ |
| u32 ringbuffer_gpadlhandle; |
| |
| /* GPADL for the channel's server context save area. */ |
| u32 server_contextarea_gpadlhandle; |
| |
| /* |
| * The upstream ring buffer begins at offset zero in the memory |
| * described by RingBufferGpadlHandle. The downstream ring buffer |
| * follows it at this offset (in pages). |
| */ |
| u32 downstream_ringbuffer_pageoffset; |
| |
| /* User-specific data to be passed along to the server endpoint. */ |
| unsigned char userdata[MAX_USER_DEFINED_BYTES]; |
| } __packed; |
| |
| /* Open Channel Result parameters */ |
| struct vmbus_channel_open_result { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| u32 openid; |
| u32 status; |
| } __packed; |
| |
| /* Close channel parameters; */ |
| struct vmbus_channel_close_channel { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| } __packed; |
| |
| /* Channel Message GPADL */ |
| #define GPADL_TYPE_RING_BUFFER 1 |
| #define GPADL_TYPE_SERVER_SAVE_AREA 2 |
| #define GPADL_TYPE_TRANSACTION 8 |
| |
| /* |
| * The number of PFNs in a GPADL message is defined by the number of |
| * pages that would be spanned by ByteCount and ByteOffset. If the |
| * implied number of PFNs won't fit in this packet, there will be a |
| * follow-up packet that contains more. |
| */ |
| struct vmbus_channel_gpadl_header { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| u32 gpadl; |
| u16 range_buflen; |
| u16 rangecount; |
| struct gpa_range range[0]; |
| } __packed; |
| |
| /* This is the followup packet that contains more PFNs. */ |
| struct vmbus_channel_gpadl_body { |
| struct vmbus_channel_message_header header; |
| u32 msgnumber; |
| u32 gpadl; |
| u64 pfn[0]; |
| } __packed; |
| |
| struct vmbus_channel_gpadl_created { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| u32 gpadl; |
| u32 creation_status; |
| } __packed; |
| |
| struct vmbus_channel_gpadl_teardown { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| u32 gpadl; |
| } __packed; |
| |
| struct vmbus_channel_gpadl_torndown { |
| struct vmbus_channel_message_header header; |
| u32 gpadl; |
| } __packed; |
| |
| #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD |
| struct vmbus_channel_view_range_add { |
| struct vmbus_channel_message_header header; |
| PHYSICAL_ADDRESS viewrange_base; |
| u64 viewrange_length; |
| u32 child_relid; |
| } __packed; |
| |
| struct vmbus_channel_view_range_remove { |
| struct vmbus_channel_message_header header; |
| PHYSICAL_ADDRESS viewrange_base; |
| u32 child_relid; |
| } __packed; |
| #endif |
| |
| struct vmbus_channel_relid_released { |
| struct vmbus_channel_message_header header; |
| u32 child_relid; |
| } __packed; |
| |
| struct vmbus_channel_initiate_contact { |
| struct vmbus_channel_message_header header; |
| u32 vmbus_version_requested; |
| u32 padding2; |
| u64 interrupt_page; |
| u64 monitor_page1; |
| u64 monitor_page2; |
| } __packed; |
| |
| struct vmbus_channel_version_response { |
| struct vmbus_channel_message_header header; |
| bool version_supported; |
| } __packed; |
| |
| enum vmbus_channel_state { |
| CHANNEL_OFFER_STATE, |
| CHANNEL_OPENING_STATE, |
| CHANNEL_OPEN_STATE, |
| }; |
| |
| struct vmbus_channel { |
| struct list_head listentry; |
| |
| struct hv_device *device_obj; |
| |
| struct timer_list poll_timer; /* SA-111 workaround */ |
| struct work_struct work; |
| |
| enum vmbus_channel_state state; |
| |
| struct vmbus_channel_offer_channel offermsg; |
| /* |
| * These are based on the OfferMsg.MonitorId. |
| * Save it here for easy access. |
| */ |
| u8 monitor_grp; |
| u8 monitor_bit; |
| |
| u32 ringbuffer_gpadlhandle; |
| |
| /* Allocated memory for ring buffer */ |
| void *ringbuffer_pages; |
| u32 ringbuffer_pagecount; |
| struct hv_ring_buffer_info outbound; /* send to parent */ |
| struct hv_ring_buffer_info inbound; /* receive from parent */ |
| spinlock_t inbound_lock; |
| struct workqueue_struct *controlwq; |
| |
| /* Channel callback are invoked in this workqueue context */ |
| /* HANDLE dataWorkQueue; */ |
| |
| void (*onchannel_callback)(void *context); |
| void *channel_callback_context; |
| }; |
| |
| struct vmbus_channel_debug_info { |
| u32 relid; |
| enum vmbus_channel_state state; |
| struct hv_guid interfacetype; |
| struct hv_guid interface_instance; |
| u32 monitorid; |
| u32 servermonitor_pending; |
| u32 servermonitor_latency; |
| u32 servermonitor_connectionid; |
| u32 clientmonitor_pending; |
| u32 clientmonitor_latency; |
| u32 clientmonitor_connectionid; |
| |
| struct hv_ring_buffer_debug_info inbound; |
| struct hv_ring_buffer_debug_info outbound; |
| }; |
| |
| /* |
| * Represents each channel msg on the vmbus connection This is a |
| * variable-size data structure depending on the msg type itself |
| */ |
| struct vmbus_channel_msginfo { |
| /* Bookkeeping stuff */ |
| struct list_head msglistentry; |
| |
| /* So far, this is only used to handle gpadl body message */ |
| struct list_head submsglist; |
| |
| /* Synchronize the request/response if needed */ |
| int wait_condition; |
| wait_queue_head_t waitevent; |
| union { |
| struct vmbus_channel_version_supported version_supported; |
| struct vmbus_channel_open_result open_result; |
| struct vmbus_channel_gpadl_torndown gpadl_torndown; |
| struct vmbus_channel_gpadl_created gpadl_created; |
| struct vmbus_channel_version_response version_response; |
| } response; |
| |
| u32 msgsize; |
| /* |
| * The channel message that goes out on the "wire". |
| * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header |
| */ |
| unsigned char msg[0]; |
| }; |
| |
| |
| void free_channel(struct vmbus_channel *channel); |
| |
| void vmbus_onmessage(void *context); |
| |
| int vmbus_request_offers(void); |
| |
| void vmbus_release_unattached_channels(void); |
| |
| #endif /* _CHANNEL_MGMT_H_ */ |