mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3a28fa35d6
Currently the mapping of the relID to channel is done under the protection of a single spin lock. Starting with ws2012, each channel is bound to a specific VCPU in the guest. Use this binding to eliminate the spin lock by setting up per-cpu state for mapping relId to the channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1188 lines
30 KiB
C
1188 lines
30 KiB
C
/*
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*
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* Copyright (c) 2011, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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* K. Y. Srinivasan <kys@microsoft.com>
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*
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*/
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#ifndef _HYPERV_H
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#define _HYPERV_H
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#include <uapi/linux/hyperv.h>
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#include <linux/types.h>
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#include <linux/scatterlist.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#define MAX_PAGE_BUFFER_COUNT 32
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#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
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#pragma pack(push, 1)
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/* Single-page buffer */
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struct hv_page_buffer {
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u32 len;
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u32 offset;
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u64 pfn;
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};
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/* Multiple-page buffer */
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struct hv_multipage_buffer {
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/* Length and Offset determines the # of pfns in the array */
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u32 len;
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u32 offset;
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u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
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};
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/* 0x18 includes the proprietary packet header */
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#define MAX_PAGE_BUFFER_PACKET (0x18 + \
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(sizeof(struct hv_page_buffer) * \
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MAX_PAGE_BUFFER_COUNT))
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#define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
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sizeof(struct hv_multipage_buffer))
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#pragma pack(pop)
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struct hv_ring_buffer {
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/* Offset in bytes from the start of ring data below */
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u32 write_index;
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/* Offset in bytes from the start of ring data below */
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u32 read_index;
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u32 interrupt_mask;
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/*
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* Win8 uses some of the reserved bits to implement
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* interrupt driven flow management. On the send side
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* we can request that the receiver interrupt the sender
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* when the ring transitions from being full to being able
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* to handle a message of size "pending_send_sz".
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*
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* Add necessary state for this enhancement.
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*/
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u32 pending_send_sz;
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u32 reserved1[12];
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union {
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struct {
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u32 feat_pending_send_sz:1;
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};
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u32 value;
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} feature_bits;
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/* Pad it to PAGE_SIZE so that data starts on page boundary */
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u8 reserved2[4028];
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/*
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* Ring data starts here + RingDataStartOffset
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* !!! DO NOT place any fields below this !!!
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*/
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u8 buffer[0];
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} __packed;
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struct hv_ring_buffer_info {
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struct hv_ring_buffer *ring_buffer;
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u32 ring_size; /* Include the shared header */
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spinlock_t ring_lock;
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u32 ring_datasize; /* < ring_size */
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u32 ring_data_startoffset;
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};
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/*
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*
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* hv_get_ringbuffer_availbytes()
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*
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* Get number of bytes available to read and to write to
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* for the specified ring buffer
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*/
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static inline void
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hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
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u32 *read, u32 *write)
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{
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u32 read_loc, write_loc, dsize;
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smp_read_barrier_depends();
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/* Capture the read/write indices before they changed */
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read_loc = rbi->ring_buffer->read_index;
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write_loc = rbi->ring_buffer->write_index;
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dsize = rbi->ring_datasize;
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*write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
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read_loc - write_loc;
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*read = dsize - *write;
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}
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/*
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* VMBUS version is 32 bit entity broken up into
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* two 16 bit quantities: major_number. minor_number.
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*
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* 0 . 13 (Windows Server 2008)
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* 1 . 1 (Windows 7)
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* 2 . 4 (Windows 8)
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* 3 . 0 (Windows 8 R2)
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*/
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#define VERSION_WS2008 ((0 << 16) | (13))
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#define VERSION_WIN7 ((1 << 16) | (1))
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#define VERSION_WIN8 ((2 << 16) | (4))
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#define VERSION_WIN8_1 ((3 << 16) | (0))
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#define VERSION_INVAL -1
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#define VERSION_CURRENT VERSION_WIN8_1
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/* Make maximum size of pipe payload of 16K */
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#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
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/* Define PipeMode values. */
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#define VMBUS_PIPE_TYPE_BYTE 0x00000000
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#define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
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/* The size of the user defined data buffer for non-pipe offers. */
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#define MAX_USER_DEFINED_BYTES 120
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/* The size of the user defined data buffer for pipe offers. */
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#define MAX_PIPE_USER_DEFINED_BYTES 116
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/*
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* At the center of the Channel Management library is the Channel Offer. This
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* struct contains the fundamental information about an offer.
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*/
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struct vmbus_channel_offer {
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uuid_le if_type;
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uuid_le if_instance;
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/*
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* These two fields are not currently used.
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*/
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u64 reserved1;
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u64 reserved2;
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u16 chn_flags;
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u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
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union {
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/* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
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struct {
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unsigned char user_def[MAX_USER_DEFINED_BYTES];
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} std;
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/*
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* Pipes:
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* The following sructure is an integrated pipe protocol, which
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* is implemented on top of standard user-defined data. Pipe
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* clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
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* use.
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*/
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struct {
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u32 pipe_mode;
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unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
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} pipe;
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} u;
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/*
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* The sub_channel_index is defined in win8.
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*/
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u16 sub_channel_index;
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u16 reserved3;
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} __packed;
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/* Server Flags */
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#define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
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#define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
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#define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
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#define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
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#define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
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#define VMBUS_CHANNEL_PARENT_OFFER 0x200
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#define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
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struct vmpacket_descriptor {
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u16 type;
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u16 offset8;
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u16 len8;
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u16 flags;
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u64 trans_id;
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} __packed;
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struct vmpacket_header {
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u32 prev_pkt_start_offset;
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struct vmpacket_descriptor descriptor;
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} __packed;
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struct vmtransfer_page_range {
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u32 byte_count;
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u32 byte_offset;
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} __packed;
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struct vmtransfer_page_packet_header {
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struct vmpacket_descriptor d;
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u16 xfer_pageset_id;
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u8 sender_owns_set;
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u8 reserved;
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u32 range_cnt;
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struct vmtransfer_page_range ranges[1];
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} __packed;
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struct vmgpadl_packet_header {
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struct vmpacket_descriptor d;
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u32 gpadl;
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u32 reserved;
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} __packed;
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struct vmadd_remove_transfer_page_set {
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struct vmpacket_descriptor d;
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u32 gpadl;
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u16 xfer_pageset_id;
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u16 reserved;
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} __packed;
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/*
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* This structure defines a range in guest physical space that can be made to
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* look virtually contiguous.
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*/
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struct gpa_range {
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u32 byte_count;
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u32 byte_offset;
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u64 pfn_array[0];
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};
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/*
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* This is the format for an Establish Gpadl packet, which contains a handle by
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* which this GPADL will be known and a set of GPA ranges associated with it.
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* This can be converted to a MDL by the guest OS. If there are multiple GPA
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* ranges, then the resulting MDL will be "chained," representing multiple VA
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* ranges.
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*/
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struct vmestablish_gpadl {
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struct vmpacket_descriptor d;
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u32 gpadl;
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u32 range_cnt;
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struct gpa_range range[1];
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} __packed;
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/*
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* This is the format for a Teardown Gpadl packet, which indicates that the
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* GPADL handle in the Establish Gpadl packet will never be referenced again.
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*/
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struct vmteardown_gpadl {
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struct vmpacket_descriptor d;
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u32 gpadl;
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u32 reserved; /* for alignment to a 8-byte boundary */
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} __packed;
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/*
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* This is the format for a GPA-Direct packet, which contains a set of GPA
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* ranges, in addition to commands and/or data.
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*/
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struct vmdata_gpa_direct {
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struct vmpacket_descriptor d;
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u32 reserved;
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u32 range_cnt;
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struct gpa_range range[1];
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} __packed;
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/* This is the format for a Additional Data Packet. */
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struct vmadditional_data {
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struct vmpacket_descriptor d;
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u64 total_bytes;
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u32 offset;
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u32 byte_cnt;
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unsigned char data[1];
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} __packed;
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union vmpacket_largest_possible_header {
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struct vmpacket_descriptor simple_hdr;
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struct vmtransfer_page_packet_header xfer_page_hdr;
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struct vmgpadl_packet_header gpadl_hdr;
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struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
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struct vmestablish_gpadl establish_gpadl_hdr;
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struct vmteardown_gpadl teardown_gpadl_hdr;
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struct vmdata_gpa_direct data_gpa_direct_hdr;
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};
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#define VMPACKET_DATA_START_ADDRESS(__packet) \
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(void *)(((unsigned char *)__packet) + \
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((struct vmpacket_descriptor)__packet)->offset8 * 8)
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#define VMPACKET_DATA_LENGTH(__packet) \
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((((struct vmpacket_descriptor)__packet)->len8 - \
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((struct vmpacket_descriptor)__packet)->offset8) * 8)
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#define VMPACKET_TRANSFER_MODE(__packet) \
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(((struct IMPACT)__packet)->type)
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enum vmbus_packet_type {
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VM_PKT_INVALID = 0x0,
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VM_PKT_SYNCH = 0x1,
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VM_PKT_ADD_XFER_PAGESET = 0x2,
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VM_PKT_RM_XFER_PAGESET = 0x3,
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VM_PKT_ESTABLISH_GPADL = 0x4,
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VM_PKT_TEARDOWN_GPADL = 0x5,
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VM_PKT_DATA_INBAND = 0x6,
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VM_PKT_DATA_USING_XFER_PAGES = 0x7,
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VM_PKT_DATA_USING_GPADL = 0x8,
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VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
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VM_PKT_CANCEL_REQUEST = 0xa,
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VM_PKT_COMP = 0xb,
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VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
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VM_PKT_ADDITIONAL_DATA = 0xd
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};
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#define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
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/* Version 1 messages */
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enum vmbus_channel_message_type {
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CHANNELMSG_INVALID = 0,
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CHANNELMSG_OFFERCHANNEL = 1,
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CHANNELMSG_RESCIND_CHANNELOFFER = 2,
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CHANNELMSG_REQUESTOFFERS = 3,
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CHANNELMSG_ALLOFFERS_DELIVERED = 4,
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CHANNELMSG_OPENCHANNEL = 5,
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CHANNELMSG_OPENCHANNEL_RESULT = 6,
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CHANNELMSG_CLOSECHANNEL = 7,
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CHANNELMSG_GPADL_HEADER = 8,
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CHANNELMSG_GPADL_BODY = 9,
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CHANNELMSG_GPADL_CREATED = 10,
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CHANNELMSG_GPADL_TEARDOWN = 11,
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CHANNELMSG_GPADL_TORNDOWN = 12,
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CHANNELMSG_RELID_RELEASED = 13,
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CHANNELMSG_INITIATE_CONTACT = 14,
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CHANNELMSG_VERSION_RESPONSE = 15,
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CHANNELMSG_UNLOAD = 16,
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#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
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CHANNELMSG_VIEWRANGE_ADD = 17,
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CHANNELMSG_VIEWRANGE_REMOVE = 18,
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#endif
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CHANNELMSG_COUNT
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};
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struct vmbus_channel_message_header {
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enum vmbus_channel_message_type msgtype;
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u32 padding;
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} __packed;
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/* Query VMBus Version parameters */
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struct vmbus_channel_query_vmbus_version {
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struct vmbus_channel_message_header header;
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u32 version;
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} __packed;
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/* VMBus Version Supported parameters */
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struct vmbus_channel_version_supported {
|
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struct vmbus_channel_message_header header;
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u8 version_supported;
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} __packed;
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/* Offer Channel parameters */
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struct vmbus_channel_offer_channel {
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struct vmbus_channel_message_header header;
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struct vmbus_channel_offer offer;
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u32 child_relid;
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u8 monitorid;
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/*
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* win7 and beyond splits this field into a bit field.
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*/
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u8 monitor_allocated:1;
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u8 reserved:7;
|
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/*
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* These are new fields added in win7 and later.
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* Do not access these fields without checking the
|
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* negotiated protocol.
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*
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* If "is_dedicated_interrupt" is set, we must not set the
|
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* associated bit in the channel bitmap while sending the
|
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* interrupt to the host.
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*
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* connection_id is to be used in signaling the host.
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*/
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u16 is_dedicated_interrupt:1;
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u16 reserved1:15;
|
|
u32 connection_id;
|
|
} __packed;
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|
|
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/* Rescind Offer parameters */
|
|
struct vmbus_channel_rescind_offer {
|
|
struct vmbus_channel_message_header header;
|
|
u32 child_relid;
|
|
} __packed;
|
|
|
|
/*
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* 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
|
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* ID
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* Flush Client -- no parameters, SynIC message contains the partition ID
|
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*/
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|
|
|
/* Open Channel parameters */
|
|
struct vmbus_channel_open_channel {
|
|
struct vmbus_channel_message_header header;
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|
|
|
/* 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;
|
|
|
|
/*
|
|
* Starting with win8, this field will be used to specify
|
|
* the target virtual processor on which to deliver the interrupt for
|
|
* the host to guest communication.
|
|
* Prior to win8, incoming channel interrupts would only
|
|
* be delivered on cpu 0. Setting this value to 0 would
|
|
* preserve the earlier behavior.
|
|
*/
|
|
u32 target_vp;
|
|
|
|
/*
|
|
* 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 target_vcpu; /* The VCPU the host should respond to */
|
|
u64 interrupt_page;
|
|
u64 monitor_page1;
|
|
u64 monitor_page2;
|
|
} __packed;
|
|
|
|
struct vmbus_channel_version_response {
|
|
struct vmbus_channel_message_header header;
|
|
u8 version_supported;
|
|
} __packed;
|
|
|
|
enum vmbus_channel_state {
|
|
CHANNEL_OFFER_STATE,
|
|
CHANNEL_OPENING_STATE,
|
|
CHANNEL_OPEN_STATE,
|
|
CHANNEL_OPENED_STATE,
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
struct completion 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];
|
|
};
|
|
|
|
struct vmbus_close_msg {
|
|
struct vmbus_channel_msginfo info;
|
|
struct vmbus_channel_close_channel msg;
|
|
};
|
|
|
|
/* Define connection identifier type. */
|
|
union hv_connection_id {
|
|
u32 asu32;
|
|
struct {
|
|
u32 id:24;
|
|
u32 reserved:8;
|
|
} u;
|
|
};
|
|
|
|
/* Definition of the hv_signal_event hypercall input structure. */
|
|
struct hv_input_signal_event {
|
|
union hv_connection_id connectionid;
|
|
u16 flag_number;
|
|
u16 rsvdz;
|
|
};
|
|
|
|
struct hv_input_signal_event_buffer {
|
|
u64 align8;
|
|
struct hv_input_signal_event event;
|
|
};
|
|
|
|
struct vmbus_channel {
|
|
struct list_head listentry;
|
|
|
|
struct hv_device *device_obj;
|
|
|
|
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;
|
|
|
|
struct vmbus_close_msg close_msg;
|
|
|
|
/* Channel callback are invoked in this workqueue context */
|
|
/* HANDLE dataWorkQueue; */
|
|
|
|
void (*onchannel_callback)(void *context);
|
|
void *channel_callback_context;
|
|
|
|
/*
|
|
* A channel can be marked for efficient (batched)
|
|
* reading:
|
|
* If batched_reading is set to "true", we read until the
|
|
* channel is empty and hold off interrupts from the host
|
|
* during the entire read process.
|
|
* If batched_reading is set to "false", the client is not
|
|
* going to perform batched reading.
|
|
*
|
|
* By default we will enable batched reading; specific
|
|
* drivers that don't want this behavior can turn it off.
|
|
*/
|
|
|
|
bool batched_reading;
|
|
|
|
bool is_dedicated_interrupt;
|
|
struct hv_input_signal_event_buffer sig_buf;
|
|
struct hv_input_signal_event *sig_event;
|
|
|
|
/*
|
|
* Starting with win8, this field will be used to specify
|
|
* the target virtual processor on which to deliver the interrupt for
|
|
* the host to guest communication.
|
|
* Prior to win8, incoming channel interrupts would only
|
|
* be delivered on cpu 0. Setting this value to 0 would
|
|
* preserve the earlier behavior.
|
|
*/
|
|
u32 target_vp;
|
|
/* The corresponding CPUID in the guest */
|
|
u32 target_cpu;
|
|
/*
|
|
* Support for sub-channels. For high performance devices,
|
|
* it will be useful to have multiple sub-channels to support
|
|
* a scalable communication infrastructure with the host.
|
|
* The support for sub-channels is implemented as an extention
|
|
* to the current infrastructure.
|
|
* The initial offer is considered the primary channel and this
|
|
* offer message will indicate if the host supports sub-channels.
|
|
* The guest is free to ask for sub-channels to be offerred and can
|
|
* open these sub-channels as a normal "primary" channel. However,
|
|
* all sub-channels will have the same type and instance guids as the
|
|
* primary channel. Requests sent on a given channel will result in a
|
|
* response on the same channel.
|
|
*/
|
|
|
|
/*
|
|
* Sub-channel creation callback. This callback will be called in
|
|
* process context when a sub-channel offer is received from the host.
|
|
* The guest can open the sub-channel in the context of this callback.
|
|
*/
|
|
void (*sc_creation_callback)(struct vmbus_channel *new_sc);
|
|
|
|
spinlock_t sc_lock;
|
|
/*
|
|
* All Sub-channels of a primary channel are linked here.
|
|
*/
|
|
struct list_head sc_list;
|
|
/*
|
|
* The primary channel this sub-channel belongs to.
|
|
* This will be NULL for the primary channel.
|
|
*/
|
|
struct vmbus_channel *primary_channel;
|
|
/*
|
|
* Support per-channel state for use by vmbus drivers.
|
|
*/
|
|
void *per_channel_state;
|
|
/*
|
|
* To support per-cpu lookup mapping of relid to channel,
|
|
* link up channels based on their CPU affinity.
|
|
*/
|
|
struct list_head percpu_list;
|
|
};
|
|
|
|
static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
|
|
{
|
|
c->batched_reading = state;
|
|
}
|
|
|
|
static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
|
|
{
|
|
c->per_channel_state = s;
|
|
}
|
|
|
|
static inline void *get_per_channel_state(struct vmbus_channel *c)
|
|
{
|
|
return c->per_channel_state;
|
|
}
|
|
|
|
void vmbus_onmessage(void *context);
|
|
|
|
int vmbus_request_offers(void);
|
|
|
|
/*
|
|
* APIs for managing sub-channels.
|
|
*/
|
|
|
|
void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
|
|
void (*sc_cr_cb)(struct vmbus_channel *new_sc));
|
|
|
|
/*
|
|
* Retrieve the (sub) channel on which to send an outgoing request.
|
|
* When a primary channel has multiple sub-channels, we choose a
|
|
* channel whose VCPU binding is closest to the VCPU on which
|
|
* this call is being made.
|
|
*/
|
|
struct vmbus_channel *vmbus_get_outgoing_channel(struct vmbus_channel *primary);
|
|
|
|
/*
|
|
* Check if sub-channels have already been offerred. This API will be useful
|
|
* when the driver is unloaded after establishing sub-channels. In this case,
|
|
* when the driver is re-loaded, the driver would have to check if the
|
|
* subchannels have already been established before attempting to request
|
|
* the creation of sub-channels.
|
|
* This function returns TRUE to indicate that subchannels have already been
|
|
* created.
|
|
* This function should be invoked after setting the callback function for
|
|
* sub-channel creation.
|
|
*/
|
|
bool vmbus_are_subchannels_present(struct vmbus_channel *primary);
|
|
|
|
/* The format must be the same as struct vmdata_gpa_direct */
|
|
struct vmbus_channel_packet_page_buffer {
|
|
u16 type;
|
|
u16 dataoffset8;
|
|
u16 length8;
|
|
u16 flags;
|
|
u64 transactionid;
|
|
u32 reserved;
|
|
u32 rangecount;
|
|
struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
|
|
} __packed;
|
|
|
|
/* The format must be the same as struct vmdata_gpa_direct */
|
|
struct vmbus_channel_packet_multipage_buffer {
|
|
u16 type;
|
|
u16 dataoffset8;
|
|
u16 length8;
|
|
u16 flags;
|
|
u64 transactionid;
|
|
u32 reserved;
|
|
u32 rangecount; /* Always 1 in this case */
|
|
struct hv_multipage_buffer range;
|
|
} __packed;
|
|
|
|
|
|
extern int vmbus_open(struct vmbus_channel *channel,
|
|
u32 send_ringbuffersize,
|
|
u32 recv_ringbuffersize,
|
|
void *userdata,
|
|
u32 userdatalen,
|
|
void(*onchannel_callback)(void *context),
|
|
void *context);
|
|
|
|
extern void vmbus_close(struct vmbus_channel *channel);
|
|
|
|
extern int vmbus_sendpacket(struct vmbus_channel *channel,
|
|
void *buffer,
|
|
u32 bufferLen,
|
|
u64 requestid,
|
|
enum vmbus_packet_type type,
|
|
u32 flags);
|
|
|
|
extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
|
|
struct hv_page_buffer pagebuffers[],
|
|
u32 pagecount,
|
|
void *buffer,
|
|
u32 bufferlen,
|
|
u64 requestid);
|
|
|
|
extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
|
|
struct hv_multipage_buffer *mpb,
|
|
void *buffer,
|
|
u32 bufferlen,
|
|
u64 requestid);
|
|
|
|
extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
|
|
void *kbuffer,
|
|
u32 size,
|
|
u32 *gpadl_handle);
|
|
|
|
extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
|
|
u32 gpadl_handle);
|
|
|
|
extern int vmbus_recvpacket(struct vmbus_channel *channel,
|
|
void *buffer,
|
|
u32 bufferlen,
|
|
u32 *buffer_actual_len,
|
|
u64 *requestid);
|
|
|
|
extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
|
|
void *buffer,
|
|
u32 bufferlen,
|
|
u32 *buffer_actual_len,
|
|
u64 *requestid);
|
|
|
|
|
|
extern void vmbus_ontimer(unsigned long data);
|
|
|
|
/* Base driver object */
|
|
struct hv_driver {
|
|
const char *name;
|
|
|
|
/* the device type supported by this driver */
|
|
uuid_le dev_type;
|
|
const struct hv_vmbus_device_id *id_table;
|
|
|
|
struct device_driver driver;
|
|
|
|
int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
|
|
int (*remove)(struct hv_device *);
|
|
void (*shutdown)(struct hv_device *);
|
|
|
|
};
|
|
|
|
/* Base device object */
|
|
struct hv_device {
|
|
/* the device type id of this device */
|
|
uuid_le dev_type;
|
|
|
|
/* the device instance id of this device */
|
|
uuid_le dev_instance;
|
|
|
|
struct device device;
|
|
|
|
struct vmbus_channel *channel;
|
|
};
|
|
|
|
|
|
static inline struct hv_device *device_to_hv_device(struct device *d)
|
|
{
|
|
return container_of(d, struct hv_device, device);
|
|
}
|
|
|
|
static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
|
|
{
|
|
return container_of(d, struct hv_driver, driver);
|
|
}
|
|
|
|
static inline void hv_set_drvdata(struct hv_device *dev, void *data)
|
|
{
|
|
dev_set_drvdata(&dev->device, data);
|
|
}
|
|
|
|
static inline void *hv_get_drvdata(struct hv_device *dev)
|
|
{
|
|
return dev_get_drvdata(&dev->device);
|
|
}
|
|
|
|
/* Vmbus interface */
|
|
#define vmbus_driver_register(driver) \
|
|
__vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
|
|
int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
|
|
struct module *owner,
|
|
const char *mod_name);
|
|
void vmbus_driver_unregister(struct hv_driver *hv_driver);
|
|
|
|
/**
|
|
* VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
|
|
*
|
|
* This macro is used to create a struct hv_vmbus_device_id that matches a
|
|
* specific device.
|
|
*/
|
|
#define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
|
|
g8, g9, ga, gb, gc, gd, ge, gf) \
|
|
.guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
|
|
g8, g9, ga, gb, gc, gd, ge, gf },
|
|
|
|
/*
|
|
* GUID definitions of various offer types - services offered to the guest.
|
|
*/
|
|
|
|
/*
|
|
* Network GUID
|
|
* {f8615163-df3e-46c5-913f-f2d2f965ed0e}
|
|
*/
|
|
#define HV_NIC_GUID \
|
|
.guid = { \
|
|
0x63, 0x51, 0x61, 0xf8, 0x3e, 0xdf, 0xc5, 0x46, \
|
|
0x91, 0x3f, 0xf2, 0xd2, 0xf9, 0x65, 0xed, 0x0e \
|
|
}
|
|
|
|
/*
|
|
* IDE GUID
|
|
* {32412632-86cb-44a2-9b5c-50d1417354f5}
|
|
*/
|
|
#define HV_IDE_GUID \
|
|
.guid = { \
|
|
0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, \
|
|
0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5 \
|
|
}
|
|
|
|
/*
|
|
* SCSI GUID
|
|
* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
|
|
*/
|
|
#define HV_SCSI_GUID \
|
|
.guid = { \
|
|
0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, \
|
|
0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f \
|
|
}
|
|
|
|
/*
|
|
* Shutdown GUID
|
|
* {0e0b6031-5213-4934-818b-38d90ced39db}
|
|
*/
|
|
#define HV_SHUTDOWN_GUID \
|
|
.guid = { \
|
|
0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, \
|
|
0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb \
|
|
}
|
|
|
|
/*
|
|
* Time Synch GUID
|
|
* {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
|
|
*/
|
|
#define HV_TS_GUID \
|
|
.guid = { \
|
|
0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49, \
|
|
0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf \
|
|
}
|
|
|
|
/*
|
|
* Heartbeat GUID
|
|
* {57164f39-9115-4e78-ab55-382f3bd5422d}
|
|
*/
|
|
#define HV_HEART_BEAT_GUID \
|
|
.guid = { \
|
|
0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, \
|
|
0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d \
|
|
}
|
|
|
|
/*
|
|
* KVP GUID
|
|
* {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
|
|
*/
|
|
#define HV_KVP_GUID \
|
|
.guid = { \
|
|
0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d, \
|
|
0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6 \
|
|
}
|
|
|
|
/*
|
|
* Dynamic memory GUID
|
|
* {525074dc-8985-46e2-8057-a307dc18a502}
|
|
*/
|
|
#define HV_DM_GUID \
|
|
.guid = { \
|
|
0xdc, 0x74, 0x50, 0X52, 0x85, 0x89, 0xe2, 0x46, \
|
|
0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02 \
|
|
}
|
|
|
|
/*
|
|
* Mouse GUID
|
|
* {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
|
|
*/
|
|
#define HV_MOUSE_GUID \
|
|
.guid = { \
|
|
0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c, \
|
|
0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a \
|
|
}
|
|
|
|
/*
|
|
* VSS (Backup/Restore) GUID
|
|
*/
|
|
#define HV_VSS_GUID \
|
|
.guid = { \
|
|
0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, \
|
|
0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 \
|
|
}
|
|
/*
|
|
* Synthetic Video GUID
|
|
* {DA0A7802-E377-4aac-8E77-0558EB1073F8}
|
|
*/
|
|
#define HV_SYNTHVID_GUID \
|
|
.guid = { \
|
|
0x02, 0x78, 0x0a, 0xda, 0x77, 0xe3, 0xac, 0x4a, \
|
|
0x8e, 0x77, 0x05, 0x58, 0xeb, 0x10, 0x73, 0xf8 \
|
|
}
|
|
|
|
/*
|
|
* Synthetic FC GUID
|
|
* {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
|
|
*/
|
|
#define HV_SYNTHFC_GUID \
|
|
.guid = { \
|
|
0x4A, 0xCC, 0x9B, 0x2F, 0x69, 0x00, 0xF3, 0x4A, \
|
|
0xB7, 0x6B, 0x6F, 0xD0, 0xBE, 0x52, 0x8C, 0xDA \
|
|
}
|
|
|
|
/*
|
|
* Guest File Copy Service
|
|
* {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
|
|
*/
|
|
|
|
#define HV_FCOPY_GUID \
|
|
.guid = { \
|
|
0xE3, 0x4B, 0xD1, 0x34, 0xE4, 0xDE, 0xC8, 0x41, \
|
|
0x9A, 0xE7, 0x6B, 0x17, 0x49, 0x77, 0xC1, 0x92 \
|
|
}
|
|
|
|
/*
|
|
* Common header for Hyper-V ICs
|
|
*/
|
|
|
|
#define ICMSGTYPE_NEGOTIATE 0
|
|
#define ICMSGTYPE_HEARTBEAT 1
|
|
#define ICMSGTYPE_KVPEXCHANGE 2
|
|
#define ICMSGTYPE_SHUTDOWN 3
|
|
#define ICMSGTYPE_TIMESYNC 4
|
|
#define ICMSGTYPE_VSS 5
|
|
|
|
#define ICMSGHDRFLAG_TRANSACTION 1
|
|
#define ICMSGHDRFLAG_REQUEST 2
|
|
#define ICMSGHDRFLAG_RESPONSE 4
|
|
|
|
|
|
/*
|
|
* While we want to handle util services as regular devices,
|
|
* there is only one instance of each of these services; so
|
|
* we statically allocate the service specific state.
|
|
*/
|
|
|
|
struct hv_util_service {
|
|
u8 *recv_buffer;
|
|
void (*util_cb)(void *);
|
|
int (*util_init)(struct hv_util_service *);
|
|
void (*util_deinit)(void);
|
|
};
|
|
|
|
struct vmbuspipe_hdr {
|
|
u32 flags;
|
|
u32 msgsize;
|
|
} __packed;
|
|
|
|
struct ic_version {
|
|
u16 major;
|
|
u16 minor;
|
|
} __packed;
|
|
|
|
struct icmsg_hdr {
|
|
struct ic_version icverframe;
|
|
u16 icmsgtype;
|
|
struct ic_version icvermsg;
|
|
u16 icmsgsize;
|
|
u32 status;
|
|
u8 ictransaction_id;
|
|
u8 icflags;
|
|
u8 reserved[2];
|
|
} __packed;
|
|
|
|
struct icmsg_negotiate {
|
|
u16 icframe_vercnt;
|
|
u16 icmsg_vercnt;
|
|
u32 reserved;
|
|
struct ic_version icversion_data[1]; /* any size array */
|
|
} __packed;
|
|
|
|
struct shutdown_msg_data {
|
|
u32 reason_code;
|
|
u32 timeout_seconds;
|
|
u32 flags;
|
|
u8 display_message[2048];
|
|
} __packed;
|
|
|
|
struct heartbeat_msg_data {
|
|
u64 seq_num;
|
|
u32 reserved[8];
|
|
} __packed;
|
|
|
|
/* Time Sync IC defs */
|
|
#define ICTIMESYNCFLAG_PROBE 0
|
|
#define ICTIMESYNCFLAG_SYNC 1
|
|
#define ICTIMESYNCFLAG_SAMPLE 2
|
|
|
|
#ifdef __x86_64__
|
|
#define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
|
|
#else
|
|
#define WLTIMEDELTA 116444736000000000LL
|
|
#endif
|
|
|
|
struct ictimesync_data {
|
|
u64 parenttime;
|
|
u64 childtime;
|
|
u64 roundtriptime;
|
|
u8 flags;
|
|
} __packed;
|
|
|
|
struct hyperv_service_callback {
|
|
u8 msg_type;
|
|
char *log_msg;
|
|
uuid_le data;
|
|
struct vmbus_channel *channel;
|
|
void (*callback) (void *context);
|
|
};
|
|
|
|
#define MAX_SRV_VER 0x7ffffff
|
|
extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *,
|
|
struct icmsg_negotiate *, u8 *, int,
|
|
int);
|
|
|
|
int hv_kvp_init(struct hv_util_service *);
|
|
void hv_kvp_deinit(void);
|
|
void hv_kvp_onchannelcallback(void *);
|
|
|
|
int hv_vss_init(struct hv_util_service *);
|
|
void hv_vss_deinit(void);
|
|
void hv_vss_onchannelcallback(void *);
|
|
|
|
extern struct resource hyperv_mmio;
|
|
|
|
/*
|
|
* Negotiated version with the Host.
|
|
*/
|
|
|
|
extern __u32 vmbus_proto_version;
|
|
|
|
#endif /* _HYPERV_H */
|