194 lines
6.6 KiB
C
Executable File
194 lines
6.6 KiB
C
Executable File
/*
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* Copyright (C) 2010 - 2013 UNISYS CORPORATION
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*/
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#ifndef __CHANNEL_H__
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#define __CHANNEL_H__
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/uuid.h>
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#define SIGNATURE_16(A, B) ((A) | ((B) << 8))
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#define SIGNATURE_32(A, B, C, D) \
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(SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16))
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#define VISOR_CHANNEL_SIGNATURE SIGNATURE_32('E', 'C', 'N', 'L')
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/*
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* enum channel_serverstate
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* @CHANNELSRV_UNINITIALIZED: Channel is in an undefined state.
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* @CHANNELSRV_READY: Channel has been initialized by server.
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*/
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enum channel_serverstate {
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CHANNELSRV_UNINITIALIZED = 0,
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CHANNELSRV_READY = 1
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};
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/*
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* enum channel_clientstate
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* @CHANNELCLI_DETACHED:
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* @CHANNELCLI_DISABLED: Client can see channel but is NOT allowed to use it
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* unless given TBD* explicit request
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* (should actually be < DETACHED).
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* @CHANNELCLI_ATTACHING: Legacy EFI client request for EFI server to attach.
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* @CHANNELCLI_ATTACHED: Idle, but client may want to use channel any time.
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* @CHANNELCLI_BUSY: Client either wants to use or is using channel.
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* @CHANNELCLI_OWNED: "No worries" state - client can access channel
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* anytime.
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*/
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enum channel_clientstate {
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CHANNELCLI_DETACHED = 0,
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CHANNELCLI_DISABLED = 1,
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CHANNELCLI_ATTACHING = 2,
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CHANNELCLI_ATTACHED = 3,
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CHANNELCLI_BUSY = 4,
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CHANNELCLI_OWNED = 5
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};
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/*
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* Values for VISOR_CHANNEL_PROTOCOL.Features: This define exists so that
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* a guest can look at the FeatureFlags in the io channel, and configure the
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* driver to use interrupts or not based on this setting. All feature bits for
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* all channels should be defined here. The io channel feature bits are defined
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* below.
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*/
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#define VISOR_DRIVER_ENABLES_INTS (0x1ULL << 1)
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#define VISOR_CHANNEL_IS_POLLING (0x1ULL << 3)
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#define VISOR_IOVM_OK_DRIVER_DISABLING_INTS (0x1ULL << 4)
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#define VISOR_DRIVER_DISABLES_INTS (0x1ULL << 5)
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#define VISOR_DRIVER_ENHANCED_RCVBUF_CHECKING (0x1ULL << 6)
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/*
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* struct channel_header - Common Channel Header
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* @signature: Signature.
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* @legacy_state: DEPRECATED - being replaced by.
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* @header_size: sizeof(struct channel_header).
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* @size: Total size of this channel in bytes.
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* @features: Flags to modify behavior.
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* @chtype: Channel type: data, bus, control, etc..
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* @partition_handle: ID of guest partition.
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* @handle: Device number of this channel in client.
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* @ch_space_offset: Offset in bytes to channel specific area.
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* @version_id: Struct channel_header Version ID.
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* @partition_index: Index of guest partition.
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* @zone_uuid: Guid of Channel's zone.
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* @cli_str_offset: Offset from channel header to null-terminated
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* ClientString (0 if ClientString not present).
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* @cli_state_boot: CHANNEL_CLIENTSTATE of pre-boot EFI client of this
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* channel.
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* @cmd_state_cli: CHANNEL_COMMANDSTATE (overloaded in Windows drivers, see
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* ServerStateUp, ServerStateDown, etc).
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* @cli_state_os: CHANNEL_CLIENTSTATE of Guest OS client of this channel.
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* @ch_characteristic: CHANNEL_CHARACTERISTIC_<xxx>.
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* @cmd_state_srv: CHANNEL_COMMANDSTATE (overloaded in Windows drivers, see
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* ServerStateUp, ServerStateDown, etc).
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* @srv_state: CHANNEL_SERVERSTATE.
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* @cli_error_boot: Bits to indicate err states for boot clients, so err
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* messages can be throttled.
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* @cli_error_os: Bits to indicate err states for OS clients, so err
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* messages can be throttled.
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* @filler: Pad out to 128 byte cacheline.
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* @recover_channel: Please add all new single-byte values below here.
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*/
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struct channel_header {
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u64 signature;
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u32 legacy_state;
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/* SrvState, CliStateBoot, and CliStateOS below */
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u32 header_size;
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u64 size;
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u64 features;
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guid_t chtype;
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u64 partition_handle;
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u64 handle;
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u64 ch_space_offset;
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u32 version_id;
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u32 partition_index;
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guid_t zone_guid;
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u32 cli_str_offset;
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u32 cli_state_boot;
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u32 cmd_state_cli;
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u32 cli_state_os;
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u32 ch_characteristic;
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u32 cmd_state_srv;
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u32 srv_state;
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u8 cli_error_boot;
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u8 cli_error_os;
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u8 filler[1];
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u8 recover_channel;
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} __packed;
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#define VISOR_CHANNEL_ENABLE_INTS (0x1ULL << 0)
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/*
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* struct signal_queue_header - Subheader for the Signal Type variation of the
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* Common Channel.
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* @version: SIGNAL_QUEUE_HEADER Version ID.
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* @chtype: Queue type: storage, network.
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* @size: Total size of this queue in bytes.
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* @sig_base_offset: Offset to signal queue area.
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* @features: Flags to modify behavior.
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* @num_sent: Total # of signals placed in this queue.
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* @num_overflows: Total # of inserts failed due to full queue.
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* @signal_size: Total size of a signal for this queue.
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* @max_slots: Max # of slots in queue, 1 slot is always empty.
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* @max_signals: Max # of signals in queue (MaxSignalSlots-1).
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* @head: Queue head signal #.
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* @num_received: Total # of signals removed from this queue.
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* @tail: Queue tail signal.
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* @reserved1: Reserved field.
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* @reserved2: Reserved field.
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* @client_queue:
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* @num_irq_received: Total # of Interrupts received. This is incremented by the
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* ISR in the guest windows driver.
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* @num_empty: Number of times that visor_signal_remove is called and
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* returned Empty Status.
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* @errorflags: Error bits set during SignalReinit to denote trouble with
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* client's fields.
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* @filler: Pad out to 64 byte cacheline.
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*/
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struct signal_queue_header {
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/* 1st cache line */
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u32 version;
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u32 chtype;
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u64 size;
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u64 sig_base_offset;
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u64 features;
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u64 num_sent;
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u64 num_overflows;
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u32 signal_size;
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u32 max_slots;
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u32 max_signals;
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u32 head;
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/* 2nd cache line */
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u64 num_received;
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u32 tail;
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u32 reserved1;
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u64 reserved2;
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u64 client_queue;
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u64 num_irq_received;
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u64 num_empty;
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u32 errorflags;
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u8 filler[12];
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} __packed;
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/* CHANNEL Guids */
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/* {414815ed-c58c-11da-95a9-00e08161165f} */
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#define VISOR_VHBA_CHANNEL_GUID \
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GUID_INIT(0x414815ed, 0xc58c, 0x11da, \
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0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
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#define VISOR_VHBA_CHANNEL_GUID_STR \
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"414815ed-c58c-11da-95a9-00e08161165f"
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#endif
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