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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 2/2] xen: Import other xen/io/*.h
> -----Original Message-----
> From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> Sent: 21 June 2019 11:55
> To: qemu-devel@xxxxxxxxxx
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>; Paul Durrant
> <Paul.Durrant@xxxxxxxxxx>; Anthony
> Perard <anthony.perard@xxxxxxxxxx>; xen-devel@xxxxxxxxxxxxxxxxxxxx; Daniel P.
> Berrangé
> <berrange@xxxxxxxxxx>
> Subject: [PATCH v3 2/2] xen: Import other xen/io/*.h
>
> A Xen public header have been imported into QEMU (by
> f65eadb639 "xen: import ring.h from xen"), but there are other header
> that depends on ring.h which come from the system when building QEMU.
>
> This patch resolves the issue of having headers from the system
> importing a different copie of ring.h.
>
> This patch is prompt by the build issue described in the previous
> patch: 'Revert xen/io/ring.h of "Clean up a few header guard symbols"'
>
> ring.h and the new imported headers are moved to
> "include/hw/xen/interface" as those describe interfaces with a guest.
>
> The imported headers are cleaned up a bit while importing them: some
> part of the file that QEMU doesn't use are removed (description
> of how to make hypercall in grant_table.h have been removed).
>
> Other cleanup:
> - xen-mapcache.c and xen-legacy-backend.c don't need grant_table.h.
> - xenfb.c doesn't need event_channel.h.
>
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Reviewed-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> ---
>
> Notes:
> v3:
> - keep original header guard
> - squashed of "xen: Fix build with public headers" and "xen: Import
> other xen/io/*.h" as this patch isn't the one that fix the build issue
> anymore.
>
> hw/9pfs/xen-9pfs.h | 4 +-
> hw/block/xen_blkif.h | 5 +-
> hw/char/xen_console.c | 2 +-
> hw/display/xenfb.c | 7 +-
> hw/net/xen_nic.c | 2 +-
> hw/usb/xen-usb.c | 3 +-
> hw/xen/xen-legacy-backend.c | 2 -
> include/hw/xen/interface/grant_table.h | 36 +
> include/hw/xen/interface/io/blkif.h | 712 +++++++++++++++
> include/hw/xen/interface/io/console.h | 46 +
> include/hw/xen/interface/io/fbif.h | 156 ++++
> include/hw/xen/interface/io/kbdif.h | 566 ++++++++++++
> include/hw/xen/interface/io/netif.h | 1010 ++++++++++++++++++++++
> include/hw/xen/interface/io/protocols.h | 42 +
> include/hw/xen/{ => interface}/io/ring.h | 0
> include/hw/xen/interface/io/usbif.h | 254 ++++++
> include/hw/xen/interface/io/xenbus.h | 70 ++
> include/hw/xen/xen_common.h | 2 +-
> 18 files changed, 2903 insertions(+), 16 deletions(-)
> create mode 100644 include/hw/xen/interface/grant_table.h
> create mode 100644 include/hw/xen/interface/io/blkif.h
> create mode 100644 include/hw/xen/interface/io/console.h
> create mode 100644 include/hw/xen/interface/io/fbif.h
> create mode 100644 include/hw/xen/interface/io/kbdif.h
> create mode 100644 include/hw/xen/interface/io/netif.h
> create mode 100644 include/hw/xen/interface/io/protocols.h
> rename include/hw/xen/{ => interface}/io/ring.h (100%)
> create mode 100644 include/hw/xen/interface/io/usbif.h
> create mode 100644 include/hw/xen/interface/io/xenbus.h
>
> diff --git a/hw/9pfs/xen-9pfs.h b/hw/9pfs/xen-9pfs.h
> index fbdee3d843..241e2216a4 100644
> --- a/hw/9pfs/xen-9pfs.h
> +++ b/hw/9pfs/xen-9pfs.h
> @@ -13,8 +13,8 @@
> #ifndef HW_9PFS_XEN_9PFS_H
> #define HW_9PFS_XEN_9PFS_H
>
> -#include <xen/io/protocols.h>
> -#include "hw/xen/io/ring.h"
> +#include "hw/xen/interface/io/protocols.h"
> +#include "hw/xen/interface/io/ring.h"
>
> /*
> * Do not merge into xen-9p-backend.c: clang doesn't allow unused static
> diff --git a/hw/block/xen_blkif.h b/hw/block/xen_blkif.h
> index a353693ea0..99733529c1 100644
> --- a/hw/block/xen_blkif.h
> +++ b/hw/block/xen_blkif.h
> @@ -1,9 +1,8 @@
> #ifndef XEN_BLKIF_H
> #define XEN_BLKIF_H
>
> -#include "hw/xen/io/ring.h"
> -#include <xen/io/blkif.h>
> -#include <xen/io/protocols.h>
> +#include "hw/xen/interface/io/blkif.h"
> +#include "hw/xen/interface/io/protocols.h"
>
> /*
> * Not a real protocol. Used to generate ring structs which contain
> diff --git a/hw/char/xen_console.c b/hw/char/xen_console.c
> index 91f34ef06c..47e1092263 100644
> --- a/hw/char/xen_console.c
> +++ b/hw/char/xen_console.c
> @@ -28,7 +28,7 @@
> #include "chardev/char-fe.h"
> #include "hw/xen/xen-legacy-backend.h"
>
> -#include <xen/io/console.h>
> +#include "hw/xen/interface/io/console.h"
>
> struct buffer {
> uint8_t *data;
> diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c
> index 6202f1150e..3c79913b31 100644
> --- a/hw/display/xenfb.c
> +++ b/hw/display/xenfb.c
> @@ -32,10 +32,9 @@
> #include "ui/console.h"
> #include "hw/xen/xen-legacy-backend.h"
>
> -#include <xen/event_channel.h>
> -#include <xen/io/fbif.h>
> -#include <xen/io/kbdif.h>
> -#include <xen/io/protocols.h>
> +#include "hw/xen/interface/io/fbif.h"
> +#include "hw/xen/interface/io/kbdif.h"
> +#include "hw/xen/interface/io/protocols.h"
>
> #include "trace.h"
>
> diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
> index 37cda8e4be..ffb3b5898d 100644
> --- a/hw/net/xen_nic.c
> +++ b/hw/net/xen_nic.c
> @@ -30,7 +30,7 @@
> #include "net/util.h"
> #include "hw/xen/xen-legacy-backend.h"
>
> -#include <xen/io/netif.h>
> +#include "hw/xen/interface/io/netif.h"
>
> /* ------------------------------------------------------------- */
>
> diff --git a/hw/usb/xen-usb.c b/hw/usb/xen-usb.c
> index b20d0cfadf..dfbb418e77 100644
> --- a/hw/usb/xen-usb.c
> +++ b/hw/usb/xen-usb.c
> @@ -32,8 +32,7 @@
> #include "qapi/qmp/qdict.h"
> #include "qapi/qmp/qstring.h"
>
> -#include "hw/xen/io/ring.h"
> -#include <xen/io/usbif.h>
> +#include "hw/xen/interface/io/usbif.h"
>
> /*
> * Check for required support of usbif.h: USBIF_SHORT_NOT_OK was the last
> diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c
> index 36fd1e9b09..3715c94fa6 100644
> --- a/hw/xen/xen-legacy-backend.c
> +++ b/hw/xen/xen-legacy-backend.c
> @@ -34,8 +34,6 @@
> #include "hw/xen/xen_pvdev.h"
> #include "monitor/qdev.h"
>
> -#include <xen/grant_table.h>
> -
> DeviceState *xen_sysdev;
> BusState *xen_sysbus;
>
> diff --git a/include/hw/xen/interface/grant_table.h
> b/include/hw/xen/interface/grant_table.h
> new file mode 100644
> index 0000000000..2af0cbdde3
> --- /dev/null
> +++ b/include/hw/xen/interface/grant_table.h
> @@ -0,0 +1,36 @@
> +/******************************************************************************
> + * grant_table.h
> + *
> + * Interface for granting foreign access to page frames, and receiving
> + * page-ownership transfers.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (c) 2004, K A Fraser
> + */
> +
> +#ifndef __XEN_PUBLIC_GRANT_TABLE_H__
> +#define __XEN_PUBLIC_GRANT_TABLE_H__
> +
> +/*
> + * Reference to a grant entry in a specified domain's grant table.
> + */
> +typedef uint32_t grant_ref_t;
> +
> +#endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */
> diff --git a/include/hw/xen/interface/io/blkif.h
> b/include/hw/xen/interface/io/blkif.h
> new file mode 100644
> index 0000000000..8b1be50ce8
> --- /dev/null
> +++ b/include/hw/xen/interface/io/blkif.h
> @@ -0,0 +1,712 @@
> +/******************************************************************************
> + * blkif.h
> + *
> + * Unified block-device I/O interface for Xen guest OSes.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (c) 2003-2004, Keir Fraser
> + * Copyright (c) 2012, Spectra Logic Corporation
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_BLKIF_H__
> +#define __XEN_PUBLIC_IO_BLKIF_H__
> +
> +#include "ring.h"
> +#include "../grant_table.h"
> +
> +/*
> + * Front->back notifications: When enqueuing a new request, sending a
> + * notification can be made conditional on req_event (i.e., the generic
> + * hold-off mechanism provided by the ring macros). Backends must set
> + * req_event appropriately (e.g., using RING_FINAL_CHECK_FOR_REQUESTS()).
> + *
> + * Back->front notifications: When enqueuing a new response, sending a
> + * notification can be made conditional on rsp_event (i.e., the generic
> + * hold-off mechanism provided by the ring macros). Frontends must set
> + * rsp_event appropriately (e.g., using RING_FINAL_CHECK_FOR_RESPONSES()).
> + */
> +
> +#ifndef blkif_vdev_t
> +#define blkif_vdev_t uint16_t
> +#endif
> +#define blkif_sector_t uint64_t
> +
> +/*
> + * Feature and Parameter Negotiation
> + * =================================
> + * The two halves of a Xen block driver utilize nodes within the XenStore to
> + * communicate capabilities and to negotiate operating parameters. This
> + * section enumerates these nodes which reside in the respective front and
> + * backend portions of the XenStore, following the XenBus convention.
> + *
> + * All data in the XenStore is stored as strings. Nodes specifying numeric
> + * values are encoded in decimal. Integer value ranges listed below are
> + * expressed as fixed sized integer types capable of storing the conversion
> + * of a properly formated node string, without loss of information.
> + *
> + * Any specified default value is in effect if the corresponding XenBus node
> + * is not present in the XenStore.
> + *
> + * XenStore nodes in sections marked "PRIVATE" are solely for use by the
> + * driver side whose XenBus tree contains them.
> + *
> + * XenStore nodes marked "DEPRECATED" in their notes section should only be
> + * used to provide interoperability with legacy implementations.
> + *
> + * See the XenBus state transition diagram below for details on when XenBus
> + * nodes must be published and when they can be queried.
> + *
> +
> *****************************************************************************
> + * Backend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *------------------ Backend Device Identification (PRIVATE)
> ------------------
> + *
> + * mode
> + * Values: "r" (read only), "w" (writable)
> + *
> + * The read or write access permissions to the backing store to be
> + * granted to the frontend.
> + *
> + * params
> + * Values: string
> + *
> + * A free formatted string providing sufficient information for the
> + * hotplug script to attach the device and provide a suitable
> + * handler (ie: a block device) for blkback to use.
> + *
> + * physical-device
> + * Values: "MAJOR:MINOR"
> + * Notes: 11
> + *
> + * MAJOR and MINOR are the major number and minor number of the
> + * backing device respectively.
> + *
> + * physical-device-path
> + * Values: path string
> + *
> + * A string that contains the absolute path to the disk image. On
> + * NetBSD and Linux this is always a block device, while on FreeBSD
> + * it can be either a block device or a regular file.
> + *
> + * type
> + * Values: "file", "phy", "tap"
> + *
> + * The type of the backing device/object.
> + *
> + *
> + * direct-io-safe
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + *
> + * The underlying storage is not affected by the direct IO memory
> + * lifetime bug. See:
> + * http://lists.xen.org/archives/html/xen-devel/2012-12/msg01154.html
> + *
> + * Therefore this option gives the backend permission to use
> + * O_DIRECT, notwithstanding that bug.
> + *
> + * That is, if this option is enabled, use of O_DIRECT is safe,
> + * in circumstances where we would normally have avoided it as a
> + * workaround for that bug. This option is not relevant for all
> + * backends, and even not necessarily supported for those for
> + * which it is relevant. A backend which knows that it is not
> + * affected by the bug can ignore this option.
> + *
> + * This option doesn't require a backend to use O_DIRECT, so it
> + * should not be used to try to control the caching behaviour.
> + *
> + *--------------------------------- Features
> ---------------------------------
> + *
> + * feature-barrier
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + *
> + * A value of "1" indicates that the backend can process requests
> + * containing the BLKIF_OP_WRITE_BARRIER request opcode. Requests
> + * of this type may still be returned at any time with the
> + * BLKIF_RSP_EOPNOTSUPP result code.
> + *
> + * feature-flush-cache
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + *
> + * A value of "1" indicates that the backend can process requests
> + * containing the BLKIF_OP_FLUSH_DISKCACHE request opcode. Requests
> + * of this type may still be returned at any time with the
> + * BLKIF_RSP_EOPNOTSUPP result code.
> + *
> + * feature-discard
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + *
> + * A value of "1" indicates that the backend can process requests
> + * containing the BLKIF_OP_DISCARD request opcode. Requests
> + * of this type may still be returned at any time with the
> + * BLKIF_RSP_EOPNOTSUPP result code.
> + *
> + * feature-persistent
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + * Notes: 7
> + *
> + * A value of "1" indicates that the backend can keep the grants used
> + * by the frontend driver mapped, so the same set of grants should be
> + * used in all transactions. The maximum number of grants the backend
> + * can map persistently depends on the implementation, but ideally it
> + * should be RING_SIZE * BLKIF_MAX_SEGMENTS_PER_REQUEST. Using this
> + * feature the backend doesn't need to unmap each grant, preventing
> + * costly TLB flushes. The backend driver should only map grants
> + * persistently if the frontend supports it. If a backend driver chooses
> + * to use the persistent protocol when the frontend doesn't support it,
> + * it will probably hit the maximum number of persistently mapped grants
> + * (due to the fact that the frontend won't be reusing the same grants),
> + * and fall back to non-persistent mode. Backend implementations may
> + * shrink or expand the number of persistently mapped grants without
> + * notifying the frontend depending on memory constraints (this might
> + * cause a performance degradation).
> + *
> + * If a backend driver wants to limit the maximum number of persistently
> + * mapped grants to a value less than RING_SIZE *
> + * BLKIF_MAX_SEGMENTS_PER_REQUEST a LRU strategy should be used to
> + * discard the grants that are less commonly used. Using a LRU in the
> + * backend driver paired with a LIFO queue in the frontend will
> + * allow us to have better performance in this scenario.
> + *
> + *----------------------- Request Transport Parameters
> ------------------------
> + *
> + * max-ring-page-order
> + * Values: <uint32_t>
> + * Default Value: 0
> + * Notes: 1, 3
> + *
> + * The maximum supported size of the request ring buffer in units of
> + * lb(machine pages). (e.g. 0 == 1 page, 1 = 2 pages, 2 == 4 pages,
> + * etc.).
> + *
> + * max-ring-pages
> + * Values: <uint32_t>
> + * Default Value: 1
> + * Notes: DEPRECATED, 2, 3
> + *
> + * The maximum supported size of the request ring buffer in units of
> + * machine pages. The value must be a power of 2.
> + *
> + *------------------------- Backend Device Properties
> -------------------------
> + *
> + * discard-enable
> + * Values: 0/1 (boolean)
> + * Default Value: 1
> + *
> + * This optional property, set by the toolstack, instructs the backend
> + * to offer (or not to offer) discard to the frontend. If the property
> + * is missing the backend should offer discard if the backing storage
> + * actually supports it.
> + *
> + * discard-alignment
> + * Values: <uint32_t>
> + * Default Value: 0
> + * Notes: 4, 5
> + *
> + * The offset, in bytes from the beginning of the virtual block device,
> + * to the first, addressable, discard extent on the underlying device.
> + *
> + * discard-granularity
> + * Values: <uint32_t>
> + * Default Value: <"sector-size">
> + * Notes: 4
> + *
> + * The size, in bytes, of the individually addressable discard extents
> + * of the underlying device.
> + *
> + * discard-secure
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + * Notes: 10
> + *
> + * A value of "1" indicates that the backend can process
> BLKIF_OP_DISCARD
> + * requests with the BLKIF_DISCARD_SECURE flag set.
> + *
> + * info
> + * Values: <uint32_t> (bitmap)
> + *
> + * A collection of bit flags describing attributes of the backing
> + * device. The VDISK_* macros define the meaning of each bit
> + * location.
> + *
> + * sector-size
> + * Values: <uint32_t>
> + *
> + * The logical block size, in bytes, of the underlying storage. This
> + * must be a power of two with a minimum value of 512.
> + *
> + * NOTE: Because of implementation bugs in some frontends this must be
> + * set to 512, unless the frontend advertizes a non-zero value
> + * in its "feature-large-sector-size" xenbus node. (See below).
> + *
> + * physical-sector-size
> + * Values: <uint32_t>
> + * Default Value: <"sector-size">
> + *
> + * The physical block size, in bytes, of the backend storage. This
> + * must be an integer multiple of "sector-size".
> + *
> + * sectors
> + * Values: <uint64_t>
> + *
> + * The size of the backend device, expressed in units of "sector-size".
> + * The product of "sector-size" and "sectors" must also be an integer
> + * multiple of "physical-sector-size", if that node is present.
> + *
> +
> *****************************************************************************
> + * Frontend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *----------------------- Request Transport Parameters
> -----------------------
> + *
> + * event-channel
> + * Values: <uint32_t>
> + *
> + * The identifier of the Xen event channel used to signal activity
> + * in the ring buffer.
> + *
> + * ring-ref
> + * Values: <uint32_t>
> + * Notes: 6
> + *
> + * The Xen grant reference granting permission for the backend to map
> + * the sole page in a single page sized ring buffer.
> + *
> + * ring-ref%u
> + * Values: <uint32_t>
> + * Notes: 6
> + *
> + * For a frontend providing a multi-page ring, a "number of ring pages"
> + * sized list of nodes, each containing a Xen grant reference granting
> + * permission for the backend to map the page of the ring located
> + * at page index "%u". Page indexes are zero based.
> + *
> + * protocol
> + * Values: string (XEN_IO_PROTO_ABI_*)
> + * Default Value: XEN_IO_PROTO_ABI_NATIVE
> + *
> + * The machine ABI rules governing the format of all ring request and
> + * response structures.
> + *
> + * ring-page-order
> + * Values: <uint32_t>
> + * Default Value: 0
> + * Maximum Value: MAX(ffs(max-ring-pages) - 1, max-ring-page-order)
> + * Notes: 1, 3
> + *
> + * The size of the frontend allocated request ring buffer in units
> + * of lb(machine pages). (e.g. 0 == 1 page, 1 = 2 pages, 2 == 4 pages,
> + * etc.).
> + *
> + * num-ring-pages
> + * Values: <uint32_t>
> + * Default Value: 1
> + * Maximum Value: MAX(max-ring-pages,(0x1 << max-ring-page-order))
> + * Notes: DEPRECATED, 2, 3
> + *
> + * The size of the frontend allocated request ring buffer in units of
> + * machine pages. The value must be a power of 2.
> + *
> + *--------------------------------- Features
> ---------------------------------
> + *
> + * feature-persistent
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + * Notes: 7, 8, 9
> + *
> + * A value of "1" indicates that the frontend will reuse the same grants
> + * for all transactions, allowing the backend to map them with write
> + * access (even when it should be read-only). If the frontend hits the
> + * maximum number of allowed persistently mapped grants, it can fallback
> + * to non persistent mode. This will cause a performance degradation,
> + * since the the backend driver will still try to map those grants
> + * persistently. Since the persistent grants protocol is compatible with
> + * the previous protocol, a frontend driver can choose to work in
> + * persistent mode even when the backend doesn't support it.
> + *
> + * It is recommended that the frontend driver stores the persistently
> + * mapped grants in a LIFO queue, so a subset of all persistently mapped
> + * grants gets used commonly. This is done in case the backend driver
> + * decides to limit the maximum number of persistently mapped grants
> + * to a value less than RING_SIZE * BLKIF_MAX_SEGMENTS_PER_REQUEST.
> + *
> + * feature-large-sector-size
> + * Values: 0/1 (boolean)
> + * Default Value: 0
> + *
> + * A value of "1" indicates that the frontend will correctly supply and
> + * interpret all sector-based quantities in terms of the "sector-size"
> + * value supplied in the backend info, whatever that may be set to.
> + * If this node is not present or its value is "0" then it is assumed
> + * that the frontend requires that the logical block size is 512 as it
> + * is hardcoded (which is the case in some frontend implementations).
> + *
> + *------------------------- Virtual Device Properties
> -------------------------
> + *
> + * device-type
> + * Values: "disk", "cdrom", "floppy", etc.
> + *
> + * virtual-device
> + * Values: <uint32_t>
> + *
> + * A value indicating the physical device to virtualize within the
> + * frontend's domain. (e.g. "The first ATA disk", "The third SCSI
> + * disk", etc.)
> + *
> + * See docs/misc/vbd-interface.txt for details on the format of this
> + * value.
> + *
> + * Notes
> + * -----
> + * (1) Multi-page ring buffer scheme first developed in the Citrix XenServer
> + * PV drivers.
> + * (2) Multi-page ring buffer scheme first used in some RedHat distributions
> + * including a distribution deployed on certain nodes of the Amazon
> + * EC2 cluster.
> + * (3) Support for multi-page ring buffers was implemented independently,
> + * in slightly different forms, by both Citrix and RedHat/Amazon.
> + * For full interoperability, block front and backends should publish
> + * identical ring parameters, adjusted for unit differences, to the
> + * XenStore nodes used in both schemes.
> + * (4) Devices that support discard functionality may internally allocate
> space
> + * (discardable extents) in units that are larger than the exported
> logical
> + * block size. If the backing device has such discardable extents the
> + * backend should provide both discard-granularity and discard-alignment.
> + * Providing just one of the two may be considered an error by the
> frontend.
> + * Backends supporting discard should include discard-granularity and
> + * discard-alignment even if it supports discarding individual sectors.
> + * Frontends should assume discard-alignment == 0 and discard-granularity
> + * == sector size if these keys are missing.
> + * (5) The discard-alignment parameter allows a physical device to be
> + * partitioned into virtual devices that do not necessarily begin or
> + * end on a discardable extent boundary.
> + * (6) When there is only a single page allocated to the request ring,
> + * 'ring-ref' is used to communicate the grant reference for this
> + * page to the backend. When using a multi-page ring, the 'ring-ref'
> + * node is not created. Instead 'ring-ref0' - 'ring-refN' are used.
> + * (7) When using persistent grants data has to be copied from/to the page
> + * where the grant is currently mapped. The overhead of doing this copy
> + * however doesn't suppress the speed improvement of not having to unmap
> + * the grants.
> + * (8) The frontend driver has to allow the backend driver to map all grants
> + * with write access, even when they should be mapped read-only, since
> + * further requests may reuse these grants and require write permissions.
> + * (9) Linux implementation doesn't have a limit on the maximum number of
> + * grants that can be persistently mapped in the frontend driver, but
> + * due to the frontent driver implementation it should never be bigger
> + * than RING_SIZE * BLKIF_MAX_SEGMENTS_PER_REQUEST.
> + *(10) The discard-secure property may be present and will be set to 1 if the
> + * backing device supports secure discard.
> + *(11) Only used by Linux and NetBSD.
> + */
> +
> +/*
> + * Multiple hardware queues/rings:
> + * If supported, the backend will write the key "multi-queue-max-queues" to
> + * the directory for that vbd, and set its value to the maximum supported
> + * number of queues.
> + * Frontends that are aware of this feature and wish to use it can write the
> + * key "multi-queue-num-queues" with the number they wish to use, which must
> be
> + * greater than zero, and no more than the value reported by the backend in
> + * "multi-queue-max-queues".
> + *
> + * For frontends requesting just one queue, the usual event-channel and
> + * ring-ref keys are written as before, simplifying the backend processing
> + * to avoid distinguishing between a frontend that doesn't understand the
> + * multi-queue feature, and one that does, but requested only one queue.
> + *
> + * Frontends requesting two or more queues must not write the toplevel
> + * event-channel and ring-ref keys, instead writing those keys under sub-keys
> + * having the name "queue-N" where N is the integer ID of the queue/ring for
> + * which those keys belong. Queues are indexed from zero.
> + * For example, a frontend with two queues must write the following set of
> + * queue-related keys:
> + *
> + * /local/domain/1/device/vbd/0/multi-queue-num-queues = "2"
> + * /local/domain/1/device/vbd/0/queue-0 = ""
> + * /local/domain/1/device/vbd/0/queue-0/ring-ref = "<ring-ref#0>"
> + * /local/domain/1/device/vbd/0/queue-0/event-channel = "<evtchn#0>"
> + * /local/domain/1/device/vbd/0/queue-1 = ""
> + * /local/domain/1/device/vbd/0/queue-1/ring-ref = "<ring-ref#1>"
> + * /local/domain/1/device/vbd/0/queue-1/event-channel = "<evtchn#1>"
> + *
> + * It is also possible to use multiple queues/rings together with
> + * feature multi-page ring buffer.
> + * For example, a frontend requests two queues/rings and the size of each
> ring
> + * buffer is two pages must write the following set of related keys:
> + *
> + * /local/domain/1/device/vbd/0/multi-queue-num-queues = "2"
> + * /local/domain/1/device/vbd/0/ring-page-order = "1"
> + * /local/domain/1/device/vbd/0/queue-0 = ""
> + * /local/domain/1/device/vbd/0/queue-0/ring-ref0 = "<ring-ref#0>"
> + * /local/domain/1/device/vbd/0/queue-0/ring-ref1 = "<ring-ref#1>"
> + * /local/domain/1/device/vbd/0/queue-0/event-channel = "<evtchn#0>"
> + * /local/domain/1/device/vbd/0/queue-1 = ""
> + * /local/domain/1/device/vbd/0/queue-1/ring-ref0 = "<ring-ref#2>"
> + * /local/domain/1/device/vbd/0/queue-1/ring-ref1 = "<ring-ref#3>"
> + * /local/domain/1/device/vbd/0/queue-1/event-channel = "<evtchn#1>"
> + *
> + */
> +
> +/*
> + * STATE DIAGRAMS
> + *
> +
> *****************************************************************************
> + * Startup
> *
> +
> *****************************************************************************
> + *
> + * Tool stack creates front and back nodes with state
> XenbusStateInitialising.
> + *
> + * Front Back
> + * ================================= =====================================
> + * XenbusStateInitialising XenbusStateInitialising
> + * o Query virtual device o Query backend device
> identification
> + * properties. data.
> + * o Setup OS device instance. o Open and validate backend device.
> + * o Publish backend features and
> + * transport parameters.
> + * |
> + * |
> + * V
> + * XenbusStateInitWait
> + *
> + * o Query backend features and
> + * transport parameters.
> + * o Allocate and initialize the
> + * request ring.
> + * o Publish transport parameters
> + * that will be in effect during
> + * this connection.
> + * |
> + * |
> + * V
> + * XenbusStateInitialised
> + *
> + * o Query frontend transport
> parameters.
> + * o Connect to the request ring and
> + * event channel.
> + * o Publish backend device properties.
> + * |
> + * |
> + * V
> + * XenbusStateConnected
> + *
> + * o Query backend device properties.
> + * o Finalize OS virtual device
> + * instance.
> + * |
> + * |
> + * V
> + * XenbusStateConnected
> + *
> + * Note: Drivers that do not support any optional features, or the
> negotiation
> + * of transport parameters, can skip certain states in the state
> machine:
> + *
> + * o A frontend may transition to XenbusStateInitialised without
> + * waiting for the backend to enter XenbusStateInitWait. In this
> + * case, default transport parameters are in effect and any
> + * transport parameters published by the frontend must contain
> + * their default values.
> + *
> + * o A backend may transition to XenbusStateInitialised, bypassing
> + * XenbusStateInitWait, without waiting for the frontend to first
> + * enter the XenbusStateInitialised state. In this case, default
> + * transport parameters are in effect and any transport parameters
> + * published by the backend must contain their default values.
> + *
> + * Drivers that support optional features and/or transport parameter
> + * negotiation must tolerate these additional state transition paths.
> + * In general this means performing the work of any skipped state
> + * transition, if it has not already been performed, in addition to the
> + * work associated with entry into the current state.
> + */
> +
> +/*
> + * REQUEST CODES.
> + */
> +#define BLKIF_OP_READ 0
> +#define BLKIF_OP_WRITE 1
> +/*
> + * All writes issued prior to a request with the BLKIF_OP_WRITE_BARRIER
> + * operation code ("barrier request") must be completed prior to the
> + * execution of the barrier request. All writes issued after the barrier
> + * request must not execute until after the completion of the barrier
> request.
> + *
> + * Optional. See "feature-barrier" XenBus node documentation above.
> + */
> +#define BLKIF_OP_WRITE_BARRIER 2
> +/*
> + * Commit any uncommitted contents of the backing device's volatile cache
> + * to stable storage.
> + *
> + * Optional. See "feature-flush-cache" XenBus node documentation above.
> + */
> +#define BLKIF_OP_FLUSH_DISKCACHE 3
> +/*
> + * Used in SLES sources for device specific command packet
> + * contained within the request. Reserved for that purpose.
> + */
> +#define BLKIF_OP_RESERVED_1 4
> +/*
> + * Indicate to the backend device that a region of storage is no longer in
> + * use, and may be discarded at any time without impact to the client. If
> + * the BLKIF_DISCARD_SECURE flag is set on the request, all copies of the
> + * discarded region on the device must be rendered unrecoverable before the
> + * command returns.
> + *
> + * This operation is analogous to performing a trim (ATA) or unamp (SCSI),
> + * command on a native device.
> + *
> + * More information about trim/unmap operations can be found at:
> + * http://t13.org/Documents/UploadedDocuments/docs2008/
> + * e07154r6-Data_Set_Management_Proposal_for_ATA-ACS2.doc
> + * http://www.seagate.com/staticfiles/support/disc/manuals/
> + * Interface%20manuals/100293068c.pdf
> + *
> + * Optional. See "feature-discard", "discard-alignment",
> + * "discard-granularity", and "discard-secure" in the XenBus node
> + * documentation above.
> + */
> +#define BLKIF_OP_DISCARD 5
> +
> +/*
> + * Recognized if "feature-max-indirect-segments" in present in the backend
> + * xenbus info. The "feature-max-indirect-segments" node contains the maximum
> + * number of segments allowed by the backend per request. If the node is
> + * present, the frontend might use blkif_request_indirect structs in order to
> + * issue requests with more than BLKIF_MAX_SEGMENTS_PER_REQUEST (11). The
> + * maximum number of indirect segments is fixed by the backend, but the
> + * frontend can issue requests with any number of indirect segments as long
> as
> + * it's less than the number provided by the backend. The indirect_grefs
> field
> + * in blkif_request_indirect should be filled by the frontend with the
> + * grant references of the pages that are holding the indirect segments.
> + * These pages are filled with an array of blkif_request_segment that hold
> the
> + * information about the segments. The number of indirect pages to use is
> + * determined by the number of segments an indirect request contains. Every
> + * indirect page can contain a maximum of
> + * (PAGE_SIZE / sizeof(struct blkif_request_segment)) segments, so to
> + * calculate the number of indirect pages to use we have to do
> + * ceil(indirect_segments / (PAGE_SIZE / sizeof(struct
> blkif_request_segment))).
> + *
> + * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not*
> + * create the "feature-max-indirect-segments" node!
> + */
> +#define BLKIF_OP_INDIRECT 6
> +
> +/*
> + * Maximum scatter/gather segments per request.
> + * This is carefully chosen so that sizeof(blkif_ring_t) <= PAGE_SIZE.
> + * NB. This could be 12 if the ring indexes weren't stored in the same page.
> + */
> +#define BLKIF_MAX_SEGMENTS_PER_REQUEST 11
> +
> +/*
> + * Maximum number of indirect pages to use per request.
> + */
> +#define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8
> +
> +/*
> + * NB. 'first_sect' and 'last_sect' in blkif_request_segment, as well as
> + * 'sector_number' in blkif_request, blkif_request_discard and
> + * blkif_request_indirect are sector-based quantities. See the description
> + * of the "feature-large-sector-size" frontend xenbus node above for
> + * more information.
> + */
> +struct blkif_request_segment {
> + grant_ref_t gref; /* reference to I/O buffer frame */
> + /* @first_sect: first sector in frame to transfer (inclusive). */
> + /* @last_sect: last sector in frame to transfer (inclusive). */
> + uint8_t first_sect, last_sect;
> +};
> +
> +/*
> + * Starting ring element for any I/O request.
> + */
> +struct blkif_request {
> + uint8_t operation; /* BLKIF_OP_??? */
> + uint8_t nr_segments; /* number of segments */
> + blkif_vdev_t handle; /* only for read/write requests */
> + uint64_t id; /* private guest value, echoed in resp */
> + blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
> + struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
> +};
> +typedef struct blkif_request blkif_request_t;
> +
> +/*
> + * Cast to this structure when blkif_request.operation == BLKIF_OP_DISCARD
> + * sizeof(struct blkif_request_discard) <= sizeof(struct blkif_request)
> + */
> +struct blkif_request_discard {
> + uint8_t operation; /* BLKIF_OP_DISCARD */
> + uint8_t flag; /* BLKIF_DISCARD_SECURE or zero */
> +#define BLKIF_DISCARD_SECURE (1<<0) /* ignored if discard-secure=0 */
> + blkif_vdev_t handle; /* same as for read/write requests */
> + uint64_t id; /* private guest value, echoed in resp */
> + blkif_sector_t sector_number;/* start sector idx on disk */
> + uint64_t nr_sectors; /* number of contiguous sectors to discard*/
> +};
> +typedef struct blkif_request_discard blkif_request_discard_t;
> +
> +struct blkif_request_indirect {
> + uint8_t operation; /* BLKIF_OP_INDIRECT */
> + uint8_t indirect_op; /* BLKIF_OP_{READ/WRITE} */
> + uint16_t nr_segments; /* number of segments */
> + uint64_t id; /* private guest value, echoed in resp */
> + blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
> + blkif_vdev_t handle; /* same as for read/write requests */
> + grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST];
> +#ifdef __i386__
> + uint64_t pad; /* Make it 64 byte aligned on i386 */
> +#endif
> +};
> +typedef struct blkif_request_indirect blkif_request_indirect_t;
> +
> +struct blkif_response {
> + uint64_t id; /* copied from request */
> + uint8_t operation; /* copied from request */
> + int16_t status; /* BLKIF_RSP_??? */
> +};
> +typedef struct blkif_response blkif_response_t;
> +
> +/*
> + * STATUS RETURN CODES.
> + */
> + /* Operation not supported (only happens on barrier writes). */
> +#define BLKIF_RSP_EOPNOTSUPP -2
> + /* Operation failed for some unspecified reason (-EIO). */
> +#define BLKIF_RSP_ERROR -1
> + /* Operation completed successfully. */
> +#define BLKIF_RSP_OKAY 0
> +
> +/*
> + * Generate blkif ring structures and types.
> + */
> +DEFINE_RING_TYPES(blkif, struct blkif_request, struct blkif_response);
> +
> +#define VDISK_CDROM 0x1
> +#define VDISK_REMOVABLE 0x2
> +#define VDISK_READONLY 0x4
> +
> +#endif /* __XEN_PUBLIC_IO_BLKIF_H__ */
> diff --git a/include/hw/xen/interface/io/console.h
> b/include/hw/xen/interface/io/console.h
> new file mode 100644
> index 0000000000..e2155d1cf5
> --- /dev/null
> +++ b/include/hw/xen/interface/io/console.h
> @@ -0,0 +1,46 @@
> +/******************************************************************************
> + * console.h
> + *
> + * Console I/O interface for Xen guest OSes.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (c) 2005, Keir Fraser
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_CONSOLE_H__
> +#define __XEN_PUBLIC_IO_CONSOLE_H__
> +
> +typedef uint32_t XENCONS_RING_IDX;
> +
> +#define MASK_XENCONS_IDX(idx, ring) ((idx) & (sizeof(ring)-1))
> +
> +struct xencons_interface {
> + char in[1024];
> + char out[2048];
> + XENCONS_RING_IDX in_cons, in_prod;
> + XENCONS_RING_IDX out_cons, out_prod;
> +};
> +
> +#ifdef XEN_WANT_FLEX_CONSOLE_RING
> +#include "ring.h"
> +DEFINE_XEN_FLEX_RING(xencons);
> +#endif
> +
> +#endif /* __XEN_PUBLIC_IO_CONSOLE_H__ */
> diff --git a/include/hw/xen/interface/io/fbif.h
> b/include/hw/xen/interface/io/fbif.h
> new file mode 100644
> index 0000000000..ea87ebec0a
> --- /dev/null
> +++ b/include/hw/xen/interface/io/fbif.h
> @@ -0,0 +1,156 @@
> +/*
> + * fbif.h -- Xen virtual frame buffer device
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (C) 2005 Anthony Liguori <aliguori@xxxxxxxxxx>
> + * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@xxxxxxxxxx>
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_FBIF_H__
> +#define __XEN_PUBLIC_IO_FBIF_H__
> +
> +/* Out events (frontend -> backend) */
> +
> +/*
> + * Out events may be sent only when requested by backend, and receipt
> + * of an unknown out event is an error.
> + */
> +
> +/* Event type 1 currently not used */
> +/*
> + * Framebuffer update notification event
> + * Capable frontend sets feature-update in xenstore.
> + * Backend requests it by setting request-update in xenstore.
> + */
> +#define XENFB_TYPE_UPDATE 2
> +
> +struct xenfb_update
> +{
> + uint8_t type; /* XENFB_TYPE_UPDATE */
> + int32_t x; /* source x */
> + int32_t y; /* source y */
> + int32_t width; /* rect width */
> + int32_t height; /* rect height */
> +};
> +
> +/*
> + * Framebuffer resize notification event
> + * Capable backend sets feature-resize in xenstore.
> + */
> +#define XENFB_TYPE_RESIZE 3
> +
> +struct xenfb_resize
> +{
> + uint8_t type; /* XENFB_TYPE_RESIZE */
> + int32_t width; /* width in pixels */
> + int32_t height; /* height in pixels */
> + int32_t stride; /* stride in bytes */
> + int32_t depth; /* depth in bits */
> + int32_t offset; /* offset of the framebuffer in bytes */
> +};
> +
> +#define XENFB_OUT_EVENT_SIZE 40
> +
> +union xenfb_out_event
> +{
> + uint8_t type;
> + struct xenfb_update update;
> + struct xenfb_resize resize;
> + char pad[XENFB_OUT_EVENT_SIZE];
> +};
> +
> +/* In events (backend -> frontend) */
> +
> +/*
> + * Frontends should ignore unknown in events.
> + */
> +
> +/*
> + * Framebuffer refresh period advice
> + * Backend sends it to advise the frontend their preferred period of
> + * refresh. Frontends that keep the framebuffer constantly up-to-date
> + * just ignore it. Frontends that use the advice should immediately
> + * refresh the framebuffer (and send an update notification event if
> + * those have been requested), then use the update frequency to guide
> + * their periodical refreshs.
> + */
> +#define XENFB_TYPE_REFRESH_PERIOD 1
> +#define XENFB_NO_REFRESH 0
> +
> +struct xenfb_refresh_period
> +{
> + uint8_t type; /* XENFB_TYPE_UPDATE_PERIOD */
> + uint32_t period; /* period of refresh, in ms,
> + * XENFB_NO_REFRESH if no refresh is needed */
> +};
> +
> +#define XENFB_IN_EVENT_SIZE 40
> +
> +union xenfb_in_event
> +{
> + uint8_t type;
> + struct xenfb_refresh_period refresh_period;
> + char pad[XENFB_IN_EVENT_SIZE];
> +};
> +
> +/* shared page */
> +
> +#define XENFB_IN_RING_SIZE 1024
> +#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
> +#define XENFB_IN_RING_OFFS 1024
> +#define XENFB_IN_RING(page) \
> + ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
> +#define XENFB_IN_RING_REF(page, idx) \
> + (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
> +
> +#define XENFB_OUT_RING_SIZE 2048
> +#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
> +#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
> +#define XENFB_OUT_RING(page) \
> + ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
> +#define XENFB_OUT_RING_REF(page, idx) \
> + (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
> +
> +struct xenfb_page
> +{
> + uint32_t in_cons, in_prod;
> + uint32_t out_cons, out_prod;
> +
> + int32_t width; /* the width of the framebuffer (in pixels) */
> + int32_t height; /* the height of the framebuffer (in pixels) */
> + uint32_t line_length; /* the length of a row of pixels (in bytes) */
> + uint32_t mem_length; /* the length of the framebuffer (in bytes) */
> + uint8_t depth; /* the depth of a pixel (in bits) */
> +
> + /*
> + * Framebuffer page directory
> + *
> + * Each directory page holds PAGE_SIZE / sizeof(*pd)
> + * framebuffer pages, and can thus map up to PAGE_SIZE *
> + * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
> + * sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2 Megs
> + * 64 bit. 256 directories give enough room for a 512 Meg
> + * framebuffer with a max resolution of 12,800x10,240. Should
> + * be enough for a while with room leftover for expansion.
> + */
> + unsigned long pd[256];
> +};
> +
> +#endif
> diff --git a/include/hw/xen/interface/io/kbdif.h
> b/include/hw/xen/interface/io/kbdif.h
> new file mode 100644
> index 0000000000..1d68cd458e
> --- /dev/null
> +++ b/include/hw/xen/interface/io/kbdif.h
> @@ -0,0 +1,566 @@
> +/*
> + * kbdif.h -- Xen virtual keyboard/mouse
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (C) 2005 Anthony Liguori <aliguori@xxxxxxxxxx>
> + * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@xxxxxxxxxx>
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_KBDIF_H__
> +#define __XEN_PUBLIC_IO_KBDIF_H__
> +
> +/*
> +
> *****************************************************************************
> + * Feature and Parameter Negotiation
> +
> *****************************************************************************
> + *
> + * The two halves of a para-virtual driver utilize nodes within
> + * XenStore to communicate capabilities and to negotiate operating
> parameters.
> + * This section enumerates these nodes which reside in the respective front
> and
> + * backend portions of XenStore, following XenBus convention.
> + *
> + * All data in XenStore is stored as strings. Nodes specifying numeric
> + * values are encoded in decimal. Integer value ranges listed below are
> + * expressed as fixed sized integer types capable of storing the conversion
> + * of a properly formated node string, without loss of information.
> + *
> +
> *****************************************************************************
> + * Backend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *---------------------------- Features supported
> ----------------------------
> + *
> + * Capable backend advertises supported features by publishing
> + * corresponding entries in XenStore and puts 1 as the value of the entry.
> + * If a feature is not supported then 0 must be set or feature entry omitted.
> + *
> + * feature-disable-keyboard
> + * Values: <uint>
> + *
> + * If there is no need to expose a virtual keyboard device by the
> + * frontend then this must be set to 1.
> + *
> + * feature-disable-pointer
> + * Values: <uint>
> + *
> + * If there is no need to expose a virtual pointer device by the
> + * frontend then this must be set to 1.
> + *
> + * feature-abs-pointer
> + * Values: <uint>
> + *
> + * Backends, which support reporting of absolute coordinates for pointer
> + * device should set this to 1.
> + *
> + * feature-multi-touch
> + * Values: <uint>
> + *
> + * Backends, which support reporting of multi-touch events
> + * should set this to 1.
> + *
> + * feature-raw-pointer
> + * Values: <uint>
> + *
> + * Backends, which support reporting raw (unscaled) absolute coordinates
> + * for pointer devices should set this to 1. Raw (unscaled) values have
> + * a range of [0, 0x7fff].
> + *
> + *----------------------- Device Instance Parameters
> ------------------------
> + *
> + * unique-id
> + * Values: <string>
> + *
> + * After device instance initialization it is assigned a unique ID,
> + * so every instance of the frontend can be identified by the backend
> + * by this ID. This can be UUID or such.
> + *
> + *------------------------- Pointer Device Parameters
> ------------------------
> + *
> + * width
> + * Values: <uint>
> + *
> + * Maximum X coordinate (width) to be used by the frontend
> + * while reporting input events, pixels, [0; UINT32_MAX].
> + *
> + * height
> + * Values: <uint>
> + *
> + * Maximum Y coordinate (height) to be used by the frontend
> + * while reporting input events, pixels, [0; UINT32_MAX].
> + *
> + *----------------------- Multi-touch Device Parameters
> ----------------------
> + *
> + * multi-touch-num-contacts
> + * Values: <uint>
> + *
> + * Number of simultaneous touches reported.
> + *
> + * multi-touch-width
> + * Values: <uint>
> + *
> + * Width of the touch area to be used by the frontend
> + * while reporting input events, pixels, [0; UINT32_MAX].
> + *
> + * multi-touch-height
> + * Values: <uint>
> + *
> + * Height of the touch area to be used by the frontend
> + * while reporting input events, pixels, [0; UINT32_MAX].
> + *
> +
> *****************************************************************************
> + * Frontend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *------------------------------ Feature request
> -----------------------------
> + *
> + * Capable frontend requests features from backend via setting corresponding
> + * entries to 1 in XenStore. Requests for features not advertised as
> supported
> + * by the backend have no effect.
> + *
> + * request-abs-pointer
> + * Values: <uint>
> + *
> + * Request backend to report absolute pointer coordinates
> + * (XENKBD_TYPE_POS) instead of relative ones (XENKBD_TYPE_MOTION).
> + *
> + * request-multi-touch
> + * Values: <uint>
> + *
> + * Request backend to report multi-touch events.
> + *
> + * request-raw-pointer
> + * Values: <uint>
> + *
> + * Request backend to report raw unscaled absolute pointer coordinates.
> + * This option is only valid if request-abs-pointer is also set.
> + * Raw unscaled coordinates have the range [0, 0x7fff]
> + *
> + *----------------------- Request Transport Parameters
> -----------------------
> + *
> + * event-channel
> + * Values: <uint>
> + *
> + * The identifier of the Xen event channel used to signal activity
> + * in the ring buffer.
> + *
> + * page-gref
> + * Values: <uint>
> + *
> + * The Xen grant reference granting permission for the backend to map
> + * a sole page in a single page sized event ring buffer.
> + *
> + * page-ref
> + * Values: <uint>
> + *
> + * OBSOLETE, not recommended for use.
> + * PFN of the shared page.
> + */
> +
> +/*
> + * EVENT CODES.
> + */
> +
> +#define XENKBD_TYPE_MOTION 1
> +#define XENKBD_TYPE_RESERVED 2
> +#define XENKBD_TYPE_KEY 3
> +#define XENKBD_TYPE_POS 4
> +#define XENKBD_TYPE_MTOUCH 5
> +
> +/* Multi-touch event sub-codes */
> +
> +#define XENKBD_MT_EV_DOWN 0
> +#define XENKBD_MT_EV_UP 1
> +#define XENKBD_MT_EV_MOTION 2
> +#define XENKBD_MT_EV_SYN 3
> +#define XENKBD_MT_EV_SHAPE 4
> +#define XENKBD_MT_EV_ORIENT 5
> +
> +/*
> + * CONSTANTS, XENSTORE FIELD AND PATH NAME STRINGS, HELPERS.
> + */
> +
> +#define XENKBD_DRIVER_NAME "vkbd"
> +
> +#define XENKBD_FIELD_FEAT_DSBL_KEYBRD "feature-disable-keyboard"
> +#define XENKBD_FIELD_FEAT_DSBL_POINTER "feature-disable-pointer"
> +#define XENKBD_FIELD_FEAT_ABS_POINTER "feature-abs-pointer"
> +#define XENKBD_FIELD_FEAT_RAW_POINTER "feature-raw-pointer"
> +#define XENKBD_FIELD_FEAT_MTOUCH "feature-multi-touch"
> +#define XENKBD_FIELD_REQ_ABS_POINTER "request-abs-pointer"
> +#define XENKBD_FIELD_REQ_RAW_POINTER "request-raw-pointer"
> +#define XENKBD_FIELD_REQ_MTOUCH "request-multi-touch"
> +#define XENKBD_FIELD_RING_GREF "page-gref"
> +#define XENKBD_FIELD_EVT_CHANNEL "event-channel"
> +#define XENKBD_FIELD_WIDTH "width"
> +#define XENKBD_FIELD_HEIGHT "height"
> +#define XENKBD_FIELD_MT_WIDTH "multi-touch-width"
> +#define XENKBD_FIELD_MT_HEIGHT "multi-touch-height"
> +#define XENKBD_FIELD_MT_NUM_CONTACTS "multi-touch-num-contacts"
> +#define XENKBD_FIELD_UNIQUE_ID "unique-id"
> +
> +/* OBSOLETE, not recommended for use */
> +#define XENKBD_FIELD_RING_REF "page-ref"
> +
> +/*
> +
> *****************************************************************************
> + * Description of the protocol between frontend and backend driver.
> +
> *****************************************************************************
> + *
> + * The two halves of a Para-virtual driver communicate with
> + * each other using a shared page and an event channel.
> + * Shared page contains a ring with event structures.
> + *
> + * All reserved fields in the structures below must be 0.
> + *
> +
> *****************************************************************************
> + * Backend to frontend events
> +
> *****************************************************************************
> + *
> + * Frontends should ignore unknown in events.
> + * All event packets have the same length (40 octets)
> + * All event packets have common header:
> + *
> + * 0 octet
> + * +-----------------+
> + * | type |
> + * +-----------------+
> + * type - uint8_t, event code, XENKBD_TYPE_???
> + *
> + *
> + * Pointer relative movement event
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MOTION | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | rel_x | 8
> + * +----------------+----------------+----------------+----------------+
> + * | rel_y | 12
> + * +----------------+----------------+----------------+----------------+
> + * | rel_z | 16
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 20
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * rel_x - int32_t, relative X motion
> + * rel_y - int32_t, relative Y motion
> + * rel_z - int32_t, relative Z motion (wheel)
> + */
> +
> +struct xenkbd_motion
> +{
> + uint8_t type;
> + int32_t rel_x;
> + int32_t rel_y;
> + int32_t rel_z;
> +};
> +
> +/*
> + * Key event (includes pointer buttons)
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_KEY | pressed | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | keycode | 8
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 12
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * pressed - uint8_t, 1 if pressed; 0 otherwise
> + * keycode - uint32_t, KEY_* from linux/input.h
> + */
> +
> +struct xenkbd_key
> +{
> + uint8_t type;
> + uint8_t pressed;
> + uint32_t keycode;
> +};
> +
> +/*
> + * Pointer absolute position event
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_POS | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | abs_x | 8
> + * +----------------+----------------+----------------+----------------+
> + * | abs_y | 12
> + * +----------------+----------------+----------------+----------------+
> + * | rel_z | 16
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 20
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * abs_x - int32_t, absolute X position (in FB pixels)
> + * abs_y - int32_t, absolute Y position (in FB pixels)
> + * rel_z - int32_t, relative Z motion (wheel)
> + */
> +
> +struct xenkbd_position
> +{
> + uint8_t type;
> + int32_t abs_x;
> + int32_t abs_y;
> + int32_t rel_z;
> +};
> +
> +/*
> + * Multi-touch event and its sub-types
> + *
> + * All multi-touch event packets have common header:
> + *
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | event_type | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + *
> + * event_type - unt8_t, multi-touch event sub-type, XENKBD_MT_EV_???
> + * contact_id - unt8_t, ID of the contact
> + *
> + * Touch interactions can consist of one or more contacts.
> + * For each contact, a series of events is generated, starting
> + * with a down event, followed by zero or more motion events,
> + * and ending with an up event. Events relating to the same
> + * contact point can be identified by the ID of the sequence: contact ID.
> + * Contact ID may be reused after XENKBD_MT_EV_UP event and
> + * is in the [0; XENKBD_FIELD_NUM_CONTACTS - 1] range.
> + *
> + * For further information please refer to documentation on Wayland [1],
> + * Linux [2] and Windows [3] multi-touch support.
> + *
> + * [1] https://cgit.freedesktop.org/wayland/wayland/tree/protocol/wayland.xml
> + * [2]
> https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt
> + * [3] https://msdn.microsoft.com/en-us/library/jj151564(v=vs.85).aspx
> + *
> + *
> + * Multi-touch down event - sent when a new touch is made: touch is assigned
> + * a unique contact ID, sent with this and consequent events related
> + * to this touch.
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_DOWN | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * | abs_x | 12
> + * +----------------+----------------+----------------+----------------+
> + * | abs_y | 16
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 20
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * abs_x - int32_t, absolute X position, in pixels
> + * abs_y - int32_t, absolute Y position, in pixels
> + *
> + * Multi-touch contact release event
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_UP | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * Multi-touch motion event
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_MOTION | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * | abs_x | 12
> + * +----------------+----------------+----------------+----------------+
> + * | abs_y | 16
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 20
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * abs_x - int32_t, absolute X position, in pixels,
> + * abs_y - int32_t, absolute Y position, in pixels,
> + *
> + * Multi-touch input synchronization event - shows end of a set of events
> + * which logically belong together.
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_SYN | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * Multi-touch shape event - touch point's shape has changed its shape.
> + * Shape is approximated by an ellipse through the major and minor axis
> + * lengths: major is the longer diameter of the ellipse and minor is the
> + * shorter one. Center of the ellipse is reported via
> + * XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events.
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_SHAPE | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * | major | 12
> + * +----------------+----------------+----------------+----------------+
> + * | minor | 16
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 20
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * major - unt32_t, length of the major axis, pixels
> + * minor - unt32_t, length of the minor axis, pixels
> + *
> + * Multi-touch orientation event - touch point's shape has changed
> + * its orientation: calculated as a clockwise angle between the major axis
> + * of the ellipse and positive Y axis in degrees, [-180; +180].
> + * 0 1 2 3 octet
> + * +----------------+----------------+----------------+----------------+
> + * | _TYPE_MTOUCH | _MT_EV_ORIENT | contact_id | reserved | 4
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 8
> + * +----------------+----------------+----------------+----------------+
> + * | orientation | reserved | 12
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 16
> + * +----------------+----------------+----------------+----------------+
> + * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
> + * +----------------+----------------+----------------+----------------+
> + * | reserved | 40
> + * +----------------+----------------+----------------+----------------+
> + *
> + * orientation - int16_t, clockwise angle of the major axis
> + */
> +
> +struct xenkbd_mtouch {
> + uint8_t type; /* XENKBD_TYPE_MTOUCH */
> + uint8_t event_type; /* XENKBD_MT_EV_??? */
> + uint8_t contact_id;
> + uint8_t reserved[5]; /* reserved for the future use */
> + union {
> + struct {
> + int32_t abs_x; /* absolute X position, pixels */
> + int32_t abs_y; /* absolute Y position, pixels */
> + } pos;
> + struct {
> + uint32_t major; /* length of the major axis, pixels */
> + uint32_t minor; /* length of the minor axis, pixels */
> + } shape;
> + int16_t orientation; /* clockwise angle of the major axis */
> + } u;
> +};
> +
> +#define XENKBD_IN_EVENT_SIZE 40
> +
> +union xenkbd_in_event
> +{
> + uint8_t type;
> + struct xenkbd_motion motion;
> + struct xenkbd_key key;
> + struct xenkbd_position pos;
> + struct xenkbd_mtouch mtouch;
> + char pad[XENKBD_IN_EVENT_SIZE];
> +};
> +
> +/*
> +
> *****************************************************************************
> + * Frontend to backend events
> +
> *****************************************************************************
> + *
> + * Out events may be sent only when requested by backend, and receipt
> + * of an unknown out event is an error.
> + * No out events currently defined.
> +
> + * All event packets have the same length (40 octets)
> + * All event packets have common header:
> + * 0 octet
> + * +-----------------+
> + * | type |
> + * +-----------------+
> + * type - uint8_t, event code
> + */
> +
> +#define XENKBD_OUT_EVENT_SIZE 40
> +
> +union xenkbd_out_event
> +{
> + uint8_t type;
> + char pad[XENKBD_OUT_EVENT_SIZE];
> +};
> +
> +/*
> +
> *****************************************************************************
> + * Shared page
> +
> *****************************************************************************
> + */
> +
> +#define XENKBD_IN_RING_SIZE 2048
> +#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
> +#define XENKBD_IN_RING_OFFS 1024
> +#define XENKBD_IN_RING(page) \
> + ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
> +#define XENKBD_IN_RING_REF(page, idx) \
> + (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
> +
> +#define XENKBD_OUT_RING_SIZE 1024
> +#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
> +#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
> +#define XENKBD_OUT_RING(page) \
> + ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
> +#define XENKBD_OUT_RING_REF(page, idx) \
> + (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
> +
> +struct xenkbd_page
> +{
> + uint32_t in_cons, in_prod;
> + uint32_t out_cons, out_prod;
> +};
> +
> +#endif /* __XEN_PUBLIC_IO_KBDIF_H__ */
> diff --git a/include/hw/xen/interface/io/netif.h
> b/include/hw/xen/interface/io/netif.h
> new file mode 100644
> index 0000000000..48fa530950
> --- /dev/null
> +++ b/include/hw/xen/interface/io/netif.h
> @@ -0,0 +1,1010 @@
> +/******************************************************************************
> + * netif.h
> + *
> + * Unified network-device I/O interface for Xen guest OSes.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (c) 2003-2004, Keir Fraser
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_NETIF_H__
> +#define __XEN_PUBLIC_IO_NETIF_H__
> +
> +#include "ring.h"
> +#include "../grant_table.h"
> +
> +/*
> + * Older implementation of Xen network frontend / backend has an
> + * implicit dependency on the MAX_SKB_FRAGS as the maximum number of
> + * ring slots a skb can use. Netfront / netback may not work as
> + * expected when frontend and backend have different MAX_SKB_FRAGS.
> + *
> + * A better approach is to add mechanism for netfront / netback to
> + * negotiate this value. However we cannot fix all possible
> + * frontends, so we need to define a value which states the minimum
> + * slots backend must support.
> + *
> + * The minimum value derives from older Linux kernel's MAX_SKB_FRAGS
> + * (18), which is proved to work with most frontends. Any new backend
> + * which doesn't negotiate with frontend should expect frontend to
> + * send a valid packet using slots up to this value.
> + */
> +#define XEN_NETIF_NR_SLOTS_MIN 18
> +
> +/*
> + * Notifications after enqueuing any type of message should be conditional on
> + * the appropriate req_event or rsp_event field in the shared ring.
> + * If the client sends notification for rx requests then it should specify
> + * feature 'feature-rx-notify' via xenbus. Otherwise the backend will assume
> + * that it cannot safely queue packets (as it may not be kicked to send
> them).
> + */
> +
> +/*
> + * "feature-split-event-channels" is introduced to separate guest TX
> + * and RX notification. Backend either doesn't support this feature or
> + * advertises it via xenstore as 0 (disabled) or 1 (enabled).
> + *
> + * To make use of this feature, frontend should allocate two event
> + * channels for TX and RX, advertise them to backend as
> + * "event-channel-tx" and "event-channel-rx" respectively. If frontend
> + * doesn't want to use this feature, it just writes "event-channel"
> + * node as before.
> + */
> +
> +/*
> + * Multiple transmit and receive queues:
> + * If supported, the backend will write the key "multi-queue-max-queues" to
> + * the directory for that vif, and set its value to the maximum supported
> + * number of queues.
> + * Frontends that are aware of this feature and wish to use it can write the
> + * key "multi-queue-num-queues", set to the number they wish to use, which
> + * must be greater than zero, and no more than the value reported by the
> backend
> + * in "multi-queue-max-queues".
> + *
> + * Queues replicate the shared rings and event channels.
> + * "feature-split-event-channels" may optionally be used when using
> + * multiple queues, but is not mandatory.
> + *
> + * Each queue consists of one shared ring pair, i.e. there must be the same
> + * number of tx and rx rings.
> + *
> + * For frontends requesting just one queue, the usual event-channel and
> + * ring-ref keys are written as before, simplifying the backend processing
> + * to avoid distinguishing between a frontend that doesn't understand the
> + * multi-queue feature, and one that does, but requested only one queue.
> + *
> + * Frontends requesting two or more queues must not write the toplevel
> + * event-channel (or event-channel-{tx,rx}) and {tx,rx}-ring-ref keys,
> + * instead writing those keys under sub-keys having the name "queue-N" where
> + * N is the integer ID of the queue for which those keys belong. Queues
> + * are indexed from zero. For example, a frontend with two queues and split
> + * event channels must write the following set of queue-related keys:
> + *
> + * /local/domain/1/device/vif/0/multi-queue-num-queues = "2"
> + * /local/domain/1/device/vif/0/queue-0 = ""
> + * /local/domain/1/device/vif/0/queue-0/tx-ring-ref = "<ring-ref-tx0>"
> + * /local/domain/1/device/vif/0/queue-0/rx-ring-ref = "<ring-ref-rx0>"
> + * /local/domain/1/device/vif/0/queue-0/event-channel-tx = "<evtchn-tx0>"
> + * /local/domain/1/device/vif/0/queue-0/event-channel-rx = "<evtchn-rx0>"
> + * /local/domain/1/device/vif/0/queue-1 = ""
> + * /local/domain/1/device/vif/0/queue-1/tx-ring-ref = "<ring-ref-tx1>"
> + * /local/domain/1/device/vif/0/queue-1/rx-ring-ref = "<ring-ref-rx1"
> + * /local/domain/1/device/vif/0/queue-1/event-channel-tx = "<evtchn-tx1>"
> + * /local/domain/1/device/vif/0/queue-1/event-channel-rx = "<evtchn-rx1>"
> + *
> + * If there is any inconsistency in the XenStore data, the backend may
> + * choose not to connect any queues, instead treating the request as an
> + * error. This includes scenarios where more (or fewer) queues were
> + * requested than the frontend provided details for.
> + *
> + * Mapping of packets to queues is considered to be a function of the
> + * transmitting system (backend or frontend) and is not negotiated
> + * between the two. Guests are free to transmit packets on any queue
> + * they choose, provided it has been set up correctly. Guests must be
> + * prepared to receive packets on any queue they have requested be set up.
> + */
> +
> +/*
> + * "feature-no-csum-offload" should be used to turn IPv4 TCP/UDP checksum
> + * offload off or on. If it is missing then the feature is assumed to be on.
> + * "feature-ipv6-csum-offload" should be used to turn IPv6 TCP/UDP checksum
> + * offload on or off. If it is missing then the feature is assumed to be off.
> + */
> +
> +/*
> + * "feature-gso-tcpv4" and "feature-gso-tcpv6" advertise the capability to
> + * handle large TCP packets (in IPv4 or IPv6 form respectively). Neither
> + * frontends nor backends are assumed to be capable unless the flags are
> + * present.
> + */
> +
> +/*
> + * "feature-multicast-control" and "feature-dynamic-multicast-control"
> + * advertise the capability to filter ethernet multicast packets in the
> + * backend. If the frontend wishes to take advantage of this feature then
> + * it may set "request-multicast-control". If the backend only advertises
> + * "feature-multicast-control" then "request-multicast-control" must be set
> + * before the frontend moves into the connected state. The backend will
> + * sample the value on this state transition and any subsequent change in
> + * value will have no effect. However, if the backend also advertises
> + * "feature-dynamic-multicast-control" then "request-multicast-control"
> + * may be set by the frontend at any time. In this case, the backend will
> + * watch the value and re-sample on watch events.
> + *
> + * If the sampled value of "request-multicast-control" is set then the
> + * backend transmit side should no longer flood multicast packets to the
> + * frontend, it should instead drop any multicast packet that does not
> + * match in a filter list.
> + * The list is amended by the frontend by sending dummy transmit requests
> + * containing XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL} extra-info fragments as
> + * specified below.
> + * Note that the filter list may be amended even if the sampled value of
> + * "request-multicast-control" is not set, however the filter should only
> + * be applied if it is set.
> + */
> +
> +/*
> + * Control ring
> + * ============
> + *
> + * Some features, such as hashing (detailed below), require a
> + * significant amount of out-of-band data to be passed from frontend to
> + * backend. Use of xenstore is not suitable for large quantities of data
> + * because of quota limitations and so a dedicated 'control ring' is used.
> + * The ability of the backend to use a control ring is advertised by
> + * setting:
> + *
> + * /local/domain/X/backend/<domid>/<vif>/feature-ctrl-ring = "1"
> + *
> + * The frontend provides a control ring to the backend by setting:
> + *
> + * /local/domain/<domid>/device/vif/<vif>/ctrl-ring-ref = <gref>
> + * /local/domain/<domid>/device/vif/<vif>/event-channel-ctrl = <port>
> + *
> + * where <gref> is the grant reference of the shared page used to
> + * implement the control ring and <port> is an event channel to be used
> + * as a mailbox interrupt. These keys must be set before the frontend
> + * moves into the connected state.
> + *
> + * The control ring uses a fixed request/response message size and is
> + * balanced (i.e. one request to one response), so operationally it is much
> + * the same as a transmit or receive ring.
> + * Note that there is no requirement that responses are issued in the same
> + * order as requests.
> + */
> +
> +/*
> + * Hash types
> + * ==========
> + *
> + * For the purposes of the definitions below, 'Packet[]' is an array of
> + * octets containing an IP packet without options, 'Array[X..Y]' means a
> + * sub-array of 'Array' containing bytes X thru Y inclusive, and '+' is
> + * used to indicate concatenation of arrays.
> + */
> +
> +/*
> + * A hash calculated over an IP version 4 header as follows:
> + *
> + * Buffer[0..8] = Packet[12..15] (source address) +
> + * Packet[16..19] (destination address)
> + *
> + * Result = Hash(Buffer, 8)
> + */
> +#define _XEN_NETIF_CTRL_HASH_TYPE_IPV4 0
> +#define XEN_NETIF_CTRL_HASH_TYPE_IPV4 \
> + (1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV4)
> +
> +/*
> + * A hash calculated over an IP version 4 header and TCP header as
> + * follows:
> + *
> + * Buffer[0..12] = Packet[12..15] (source address) +
> + * Packet[16..19] (destination address) +
> + * Packet[20..21] (source port) +
> + * Packet[22..23] (destination port)
> + *
> + * Result = Hash(Buffer, 12)
> + */
> +#define _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP 1
> +#define XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP \
> + (1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)
> +
> +/*
> + * A hash calculated over an IP version 6 header as follows:
> + *
> + * Buffer[0..32] = Packet[8..23] (source address ) +
> + * Packet[24..39] (destination address)
> + *
> + * Result = Hash(Buffer, 32)
> + */
> +#define _XEN_NETIF_CTRL_HASH_TYPE_IPV6 2
> +#define XEN_NETIF_CTRL_HASH_TYPE_IPV6 \
> + (1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV6)
> +
> +/*
> + * A hash calculated over an IP version 6 header and TCP header as
> + * follows:
> + *
> + * Buffer[0..36] = Packet[8..23] (source address) +
> + * Packet[24..39] (destination address) +
> + * Packet[40..41] (source port) +
> + * Packet[42..43] (destination port)
> + *
> + * Result = Hash(Buffer, 36)
> + */
> +#define _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP 3
> +#define XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP \
> + (1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)
> +
> +/*
> + * Hash algorithms
> + * ===============
> + */
> +
> +#define XEN_NETIF_CTRL_HASH_ALGORITHM_NONE 0
> +
> +/*
> + * Toeplitz hash:
> + */
> +
> +#define XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ 1
> +
> +/*
> + * Control requests (struct xen_netif_ctrl_request)
> + * ================================================
> + *
> + * All requests have the following format:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | type | data[0] |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | data[1] | data[2] |
> + * +-----+-----+-----+-----+-----------------------+
> + *
> + * id: the request identifier, echoed in response.
> + * type: the type of request (see below)
> + * data[]: any data associated with the request (determined by type)
> + */
> +
> +struct xen_netif_ctrl_request {
> + uint16_t id;
> + uint16_t type;
> +
> +#define XEN_NETIF_CTRL_TYPE_INVALID 0
> +#define XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS 1
> +#define XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS 2
> +#define XEN_NETIF_CTRL_TYPE_SET_HASH_KEY 3
> +#define XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE 4
> +#define XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE 5
> +#define XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING 6
> +#define XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM 7
> +#define XEN_NETIF_CTRL_TYPE_GET_GREF_MAPPING_SIZE 8
> +#define XEN_NETIF_CTRL_TYPE_ADD_GREF_MAPPING 9
> +#define XEN_NETIF_CTRL_TYPE_DEL_GREF_MAPPING 10
> +
> + uint32_t data[3];
> +};
> +
> +/*
> + * Control responses (struct xen_netif_ctrl_response)
> + * ==================================================
> + *
> + * All responses have the following format:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | type | status |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | data |
> + * +-----+-----+-----+-----+
> + *
> + * id: the corresponding request identifier
> + * type: the type of the corresponding request
> + * status: the status of request processing
> + * data: any data associated with the response (determined by type and
> + * status)
> + */
> +
> +struct xen_netif_ctrl_response {
> + uint16_t id;
> + uint16_t type;
> + uint32_t status;
> +
> +#define XEN_NETIF_CTRL_STATUS_SUCCESS 0
> +#define XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED 1
> +#define XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER 2
> +#define XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW 3
> +
> + uint32_t data;
> +};
> +
> +/*
> + * Static Grants (struct xen_netif_gref)
> + * =====================================
> + *
> + * A frontend may provide a fixed set of grant references to be mapped on
> + * the backend. The message of type XEN_NETIF_CTRL_TYPE_ADD_GREF_MAPPING
> + * prior its usage in the command ring allows for creation of these mappings.
> + * The backend will maintain a fixed amount of these mappings.
> + *
> + * XEN_NETIF_CTRL_TYPE_GET_GREF_MAPPING_SIZE lets a frontend query how many
> + * of these mappings can be kept.
> + *
> + * Each entry in the XEN_NETIF_CTRL_TYPE_{ADD,DEL}_GREF_MAPPING input table
> has
> + * the following format:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | grant ref | flags | status |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * grant ref: grant reference (IN)
> + * flags: flags describing the control operation (IN)
> + * status: XEN_NETIF_CTRL_STATUS_* (OUT)
> + *
> + * 'status' is an output parameter which does not require to be set to zero
> + * prior to its usage in the corresponding control messages.
> + */
> +
> +struct xen_netif_gref {
> + grant_ref_t ref;
> + uint16_t flags;
> +
> +#define _XEN_NETIF_CTRLF_GREF_readonly 0
> +#define XEN_NETIF_CTRLF_GREF_readonly (1U<<_XEN_NETIF_CTRLF_GREF_readonly)
> +
> + uint16_t status;
> +};
> +
> +/*
> + * Control messages
> + * ================
> + *
> + * XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM
> + * --------------------------------------
> + *
> + * This is sent by the frontend to set the desired hash algorithm.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM
> + * data[0] = a XEN_NETIF_CTRL_HASH_ALGORITHM_* value
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - The algorithm is not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + *
> + * NOTE: Setting data[0] to XEN_NETIF_CTRL_HASH_ALGORITHM_NONE disables
> + * hashing and the backend is free to choose how it steers packets
> + * to queues (which is the default behaviour).
> + *
> + * XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS
> + * ----------------------------------
> + *
> + * This is sent by the frontend to query the types of hash supported by
> + * the backend.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS
> + * data[0] = 0
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not supported
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = supported hash types (if operation was successful)
> + *
> + * NOTE: A valid hash algorithm must be selected before this operation can
> + * succeed.
> + *
> + * XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS
> + * ----------------------------------
> + *
> + * This is sent by the frontend to set the types of hash that the backend
> + * should calculate. (See above for hash type definitions).
> + * Note that the 'maximal' type of hash should always be chosen. For
> + * example, if the frontend sets both IPV4 and IPV4_TCP hash types then
> + * the latter hash type should be calculated for any TCP packet and the
> + * former only calculated for non-TCP packets.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS
> + * data[0] = bitwise OR of XEN_NETIF_CTRL_HASH_TYPE_* values
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - One or more flag
> + * value is invalid or
> + * unsupported
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = 0
> + *
> + * NOTE: A valid hash algorithm must be selected before this operation can
> + * succeed.
> + * Also, setting data[0] to zero disables hashing and the backend
> + * is free to choose how it steers packets to queues.
> + *
> + * XEN_NETIF_CTRL_TYPE_SET_HASH_KEY
> + * --------------------------------
> + *
> + * This is sent by the frontend to set the key of the hash if the algorithm
> + * requires it. (See hash algorithms above).
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_SET_HASH_KEY
> + * data[0] = grant reference of page containing the key (assumed to
> + * start at beginning of grant)
> + * data[1] = size of key in octets
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Key size is invalid
> + * XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW - Key size is larger
> + * than the backend
> + * supports
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = 0
> + *
> + * NOTE: Any key octets not specified are assumed to be zero (the key
> + * is assumed to be empty by default) and specifying a new key
> + * invalidates any previous key, hence specifying a key size of
> + * zero will clear the key (which ensures that the calculated hash
> + * will always be zero).
> + * The maximum size of key is algorithm and backend specific, but
> + * is also limited by the single grant reference.
> + * The grant reference may be read-only and must remain valid until
> + * the response has been processed.
> + *
> + * XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE
> + * -----------------------------------------
> + *
> + * This is sent by the frontend to query the maximum size of mapping
> + * table supported by the backend. The size is specified in terms of
> + * table entries.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE
> + * data[0] = 0
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not supported
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = maximum number of entries allowed in the mapping table
> + * (if operation was successful) or zero if a mapping table is
> + * not supported (i.e. hash mapping is done only by modular
> + * arithmetic).
> + *
> + * XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
> + * -------------------------------------
> + *
> + * This is sent by the frontend to set the actual size of the mapping
> + * table to be used by the backend. The size is specified in terms of
> + * table entries.
> + * Any previous table is invalidated by this message and any new table
> + * is assumed to be zero filled.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
> + * data[0] = number of entries in mapping table
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Table size is invalid
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = 0
> + *
> + * NOTE: Setting data[0] to 0 means that hash mapping should be done
> + * using modular arithmetic.
> + *
> + * XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING
> + * ------------------------------------
> + *
> + * This is sent by the frontend to set the content of the table mapping
> + * hash value to queue number. The backend should calculate the hash from
> + * the packet header, use it as an index into the table (modulo the size
> + * of the table) and then steer the packet to the queue number found at
> + * that index.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING
> + * data[0] = grant reference of page containing the mapping (sub-)table
> + * (assumed to start at beginning of grant)
> + * data[1] = size of (sub-)table in entries
> + * data[2] = offset, in entries, of sub-table within overall table
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Table size or content
> + * is invalid
> + * XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW - Table size is larger
> + * than the backend
> + * supports
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = 0
> + *
> + * NOTE: The overall table has the following format:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | mapping[0] | mapping[1] |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | . |
> + * | . |
> + * | . |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | mapping[N-2] | mapping[N-1] |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * where N is specified by a XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
> + * message and each mapping must specifies a queue between 0 and
> + * "multi-queue-num-queues" (see above).
> + * The backend may support a mapping table larger than can be
> + * mapped by a single grant reference. Thus sub-tables within a
> + * larger table can be individually set by sending multiple messages
> + * with differing offset values. Specifying a new sub-table does not
> + * invalidate any table data outside that range.
> + * The grant reference may be read-only and must remain valid until
> + * the response has been processed.
> + *
> + * XEN_NETIF_CTRL_TYPE_GET_GREF_MAPPING_SIZE
> + * -----------------------------------------
> + *
> + * This is sent by the frontend to fetch the number of grefs that can be kept
> + * mapped in the backend.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_GET_GREF_MAPPING_SIZE
> + * data[0] = queue index (assumed 0 for single queue)
> + * data[1] = 0
> + * data[2] = 0
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - The queue index is
> + * out of range
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = maximum number of entries allowed in the gref mapping table
> + * (if operation was successful) or zero if it is not supported.
> + *
> + * XEN_NETIF_CTRL_TYPE_ADD_GREF_MAPPING
> + * ------------------------------------
> + *
> + * This is sent by the frontend for backend to map a list of grant
> + * references.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_ADD_GREF_MAPPING
> + * data[0] = queue index
> + * data[1] = grant reference of page containing the mapping list
> + * (r/w and assumed to start at beginning of page)
> + * data[2] = size of list in entries
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Operation failed
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + *
> + * NOTE: Each entry in the input table has the format outlined
> + * in struct xen_netif_gref.
> + * Contrary to XEN_NETIF_CTRL_TYPE_DEL_GREF_MAPPING, the struct
> + * xen_netif_gref 'status' field is not used and therefore the response
> + * 'status' determines the success of this operation. In case of
> + * failure none of grants mappings get added in the backend.
> + *
> + * XEN_NETIF_CTRL_TYPE_DEL_GREF_MAPPING
> + * ------------------------------------
> + *
> + * This is sent by the frontend for backend to unmap a list of grant
> + * references.
> + *
> + * Request:
> + *
> + * type = XEN_NETIF_CTRL_TYPE_DEL_GREF_MAPPING
> + * data[0] = queue index
> + * data[1] = grant reference of page containing the mapping list
> + * (r/w and assumed to start at beginning of page)
> + * data[2] = size of list in entries
> + *
> + * Response:
> + *
> + * status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
> + * supported
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Operation failed
> + * XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
> + * data = number of entries that were unmapped
> + *
> + * NOTE: Each entry in the input table has the format outlined in struct
> + * xen_netif_gref.
> + * The struct xen_netif_gref 'status' field determines if the entry
> + * was successfully removed.
> + * The entries used are only the ones representing grant references
> that
> + * were previously the subject of a
> XEN_NETIF_CTRL_TYPE_ADD_GREF_MAPPING
> + * operation. Any other entries will have their status set to
> + * XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER upon completion.
> + */
> +
> +DEFINE_RING_TYPES(xen_netif_ctrl,
> + struct xen_netif_ctrl_request,
> + struct xen_netif_ctrl_response);
> +
> +/*
> + * Guest transmit
> + * ==============
> + *
> + * This is the 'wire' format for transmit (frontend -> backend) packets:
> + *
> + * Fragment 1: netif_tx_request_t - flags = NETTXF_*
> + * size = total packet size
> + * [Extra 1: netif_extra_info_t] - (only if fragment 1 flags include
> + * NETTXF_extra_info)
> + * ...
> + * [Extra N: netif_extra_info_t] - (only if extra N-1 flags include
> + * XEN_NETIF_EXTRA_MORE)
> + * ...
> + * Fragment N: netif_tx_request_t - (only if fragment N-1 flags include
> + * NETTXF_more_data - flags on preceding
> + * extras are not relevant here)
> + * flags = 0
> + * size = fragment size
> + *
> + * NOTE:
> + *
> + * This format slightly is different from that used for receive
> + * (backend -> frontend) packets. Specifically, in a multi-fragment
> + * packet the actual size of fragment 1 can only be determined by
> + * subtracting the sizes of fragments 2..N from the total packet size.
> + *
> + * Ring slot size is 12 octets, however not all request/response
> + * structs use the full size.
> + *
> + * tx request data (netif_tx_request_t)
> + * ------------------------------------
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | grant ref | offset | flags |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | size |
> + * +-----+-----+-----+-----+
> + *
> + * grant ref: Reference to buffer page.
> + * offset: Offset within buffer page.
> + * flags: NETTXF_*.
> + * id: request identifier, echoed in response.
> + * size: packet size in bytes.
> + *
> + * tx response (netif_tx_response_t)
> + * ---------------------------------
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | status | unused |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | unused |
> + * +-----+-----+-----+-----+
> + *
> + * id: reflects id in transmit request
> + * status: NETIF_RSP_*
> + *
> + * Guest receive
> + * =============
> + *
> + * This is the 'wire' format for receive (backend -> frontend) packets:
> + *
> + * Fragment 1: netif_rx_request_t - flags = NETRXF_*
> + * size = fragment size
> + * [Extra 1: netif_extra_info_t] - (only if fragment 1 flags include
> + * NETRXF_extra_info)
> + * ...
> + * [Extra N: netif_extra_info_t] - (only if extra N-1 flags include
> + * XEN_NETIF_EXTRA_MORE)
> + * ...
> + * Fragment N: netif_rx_request_t - (only if fragment N-1 flags include
> + * NETRXF_more_data - flags on preceding
> + * extras are not relevant here)
> + * flags = 0
> + * size = fragment size
> + *
> + * NOTE:
> + *
> + * This format slightly is different from that used for transmit
> + * (frontend -> backend) packets. Specifically, in a multi-fragment
> + * packet the size of the packet can only be determined by summing the
> + * sizes of fragments 1..N.
> + *
> + * Ring slot size is 8 octets.
> + *
> + * rx request (netif_rx_request_t)
> + * -------------------------------
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | pad | gref |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * id: request identifier, echoed in response.
> + * gref: reference to incoming granted frame.
> + *
> + * rx response (netif_rx_response_t)
> + * ---------------------------------
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | id | offset | flags | status |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * id: reflects id in receive request
> + * offset: offset in page of start of received packet
> + * flags: NETRXF_*
> + * status: -ve: NETIF_RSP_*; +ve: Rx'ed pkt size.
> + *
> + * NOTE: Historically, to support GSO on the frontend receive side, Linux
> + * netfront does not make use of the rx response id (because, as
> + * described below, extra info structures overlay the id field).
> + * Instead it assumes that responses always appear in the same ring
> + * slot as their corresponding request. Thus, to maintain
> + * compatibility, backends must make sure this is the case.
> + *
> + * Extra Info
> + * ==========
> + *
> + * Can be present if initial request or response has NET{T,R}XF_extra_info,
> + * or previous extra request has XEN_NETIF_EXTRA_MORE.
> + *
> + * The struct therefore needs to fit into either a tx or rx slot and
> + * is therefore limited to 8 octets.
> + *
> + * NOTE: Because extra info data overlays the usual request/response
> + * structures, there is no id information in the opposite direction.
> + * So, if an extra info overlays an rx response the frontend can
> + * assume that it is in the same ring slot as the request that was
> + * consumed to make the slot available, and the backend must ensure
> + * this assumption is true.
> + *
> + * extra info (netif_extra_info_t)
> + * -------------------------------
> + *
> + * General format:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * |type |flags| type specific data |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * | padding for tx |
> + * +-----+-----+-----+-----+
> + *
> + * type: XEN_NETIF_EXTRA_TYPE_*
> + * flags: XEN_NETIF_EXTRA_FLAG_*
> + * padding for tx: present only in the tx case due to 8 octet limit
> + * from rx case. Not shown in type specific entries
> + * below.
> + *
> + * XEN_NETIF_EXTRA_TYPE_GSO:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * |type |flags| size |type | pad | features |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * type: Must be XEN_NETIF_EXTRA_TYPE_GSO
> + * flags: XEN_NETIF_EXTRA_FLAG_*
> + * size: Maximum payload size of each segment. For example,
> + * for TCP this is just the path MSS.
> + * type: XEN_NETIF_GSO_TYPE_*: This determines the protocol of
> + * the packet and any extra features required to segment the
> + * packet properly.
> + * features: EN_NETIF_GSO_FEAT_*: This specifies any extra GSO
> + * features required to process this packet, such as ECN
> + * support for TCPv4.
> + *
> + * XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}:
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * |type |flags| addr |
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * type: Must be XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}
> + * flags: XEN_NETIF_EXTRA_FLAG_*
> + * addr: address to add/remove
> + *
> + * XEN_NETIF_EXTRA_TYPE_HASH:
> + *
> + * A backend that supports teoplitz hashing is assumed to accept
> + * this type of extra info in transmit packets.
> + * A frontend that enables hashing is assumed to accept
> + * this type of extra info in receive packets.
> + *
> + * 0 1 2 3 4 5 6 7 octet
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + * |type |flags|htype| alg |LSB ---- value ---- MSB|
> + * +-----+-----+-----+-----+-----+-----+-----+-----+
> + *
> + * type: Must be XEN_NETIF_EXTRA_TYPE_HASH
> + * flags: XEN_NETIF_EXTRA_FLAG_*
> + * htype: Hash type (one of _XEN_NETIF_CTRL_HASH_TYPE_* - see above)
> + * alg: The algorithm used to calculate the hash (one of
> + * XEN_NETIF_CTRL_HASH_TYPE_ALGORITHM_* - see above)
> + * value: Hash value
> + */
> +
> +/* Protocol checksum field is blank in the packet (hardware offload)? */
> +#define _NETTXF_csum_blank (0)
> +#define NETTXF_csum_blank (1U<<_NETTXF_csum_blank)
> +
> +/* Packet data has been validated against protocol checksum. */
> +#define _NETTXF_data_validated (1)
> +#define NETTXF_data_validated (1U<<_NETTXF_data_validated)
> +
> +/* Packet continues in the next request descriptor. */
> +#define _NETTXF_more_data (2)
> +#define NETTXF_more_data (1U<<_NETTXF_more_data)
> +
> +/* Packet to be followed by extra descriptor(s). */
> +#define _NETTXF_extra_info (3)
> +#define NETTXF_extra_info (1U<<_NETTXF_extra_info)
> +
> +#define XEN_NETIF_MAX_TX_SIZE 0xFFFF
> +struct netif_tx_request {
> + grant_ref_t gref;
> + uint16_t offset;
> + uint16_t flags;
> + uint16_t id;
> + uint16_t size;
> +};
> +typedef struct netif_tx_request netif_tx_request_t;
> +
> +/* Types of netif_extra_info descriptors. */
> +#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */
> +#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */
> +#define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */
> +#define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */
> +#define XEN_NETIF_EXTRA_TYPE_HASH (4) /* u.hash */
> +#define XEN_NETIF_EXTRA_TYPE_MAX (5)
> +
> +/* netif_extra_info_t flags. */
> +#define _XEN_NETIF_EXTRA_FLAG_MORE (0)
> +#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
> +
> +/* GSO types */
> +#define XEN_NETIF_GSO_TYPE_NONE (0)
> +#define XEN_NETIF_GSO_TYPE_TCPV4 (1)
> +#define XEN_NETIF_GSO_TYPE_TCPV6 (2)
> +
> +/*
> + * This structure needs to fit within both netif_tx_request_t and
> + * netif_rx_response_t for compatibility.
> + */
> +struct netif_extra_info {
> + uint8_t type;
> + uint8_t flags;
> + union {
> + struct {
> + uint16_t size;
> + uint8_t type;
> + uint8_t pad;
> + uint16_t features;
> + } gso;
> + struct {
> + uint8_t addr[6];
> + } mcast;
> + struct {
> + uint8_t type;
> + uint8_t algorithm;
> + uint8_t value[4];
> + } hash;
> + uint16_t pad[3];
> + } u;
> +};
> +typedef struct netif_extra_info netif_extra_info_t;
> +
> +struct netif_tx_response {
> + uint16_t id;
> + int16_t status;
> +};
> +typedef struct netif_tx_response netif_tx_response_t;
> +
> +struct netif_rx_request {
> + uint16_t id; /* Echoed in response message. */
> + uint16_t pad;
> + grant_ref_t gref;
> +};
> +typedef struct netif_rx_request netif_rx_request_t;
> +
> +/* Packet data has been validated against protocol checksum. */
> +#define _NETRXF_data_validated (0)
> +#define NETRXF_data_validated (1U<<_NETRXF_data_validated)
> +
> +/* Protocol checksum field is blank in the packet (hardware offload)? */
> +#define _NETRXF_csum_blank (1)
> +#define NETRXF_csum_blank (1U<<_NETRXF_csum_blank)
> +
> +/* Packet continues in the next request descriptor. */
> +#define _NETRXF_more_data (2)
> +#define NETRXF_more_data (1U<<_NETRXF_more_data)
> +
> +/* Packet to be followed by extra descriptor(s). */
> +#define _NETRXF_extra_info (3)
> +#define NETRXF_extra_info (1U<<_NETRXF_extra_info)
> +
> +/* Packet has GSO prefix. Deprecated but included for compatibility */
> +#define _NETRXF_gso_prefix (4)
> +#define NETRXF_gso_prefix (1U<<_NETRXF_gso_prefix)
> +
> +struct netif_rx_response {
> + uint16_t id;
> + uint16_t offset;
> + uint16_t flags;
> + int16_t status;
> +};
> +typedef struct netif_rx_response netif_rx_response_t;
> +
> +/*
> + * Generate netif ring structures and types.
> + */
> +
> +DEFINE_RING_TYPES(netif_tx, struct netif_tx_request, struct
> netif_tx_response);
> +DEFINE_RING_TYPES(netif_rx, struct netif_rx_request, struct
> netif_rx_response);
> +
> +#define NETIF_RSP_DROPPED -2
> +#define NETIF_RSP_ERROR -1
> +#define NETIF_RSP_OKAY 0
> +/* No response: used for auxiliary requests (e.g., netif_extra_info_t). */
> +#define NETIF_RSP_NULL 1
> +
> +#endif
> diff --git a/include/hw/xen/interface/io/protocols.h
> b/include/hw/xen/interface/io/protocols.h
> new file mode 100644
> index 0000000000..52b4de0f81
> --- /dev/null
> +++ b/include/hw/xen/interface/io/protocols.h
> @@ -0,0 +1,42 @@
> +/******************************************************************************
> + * protocols.h
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (c) 2008, Keir Fraser
> + */
> +
> +#ifndef __XEN_PROTOCOLS_H__
> +#define __XEN_PROTOCOLS_H__
> +
> +#define XEN_IO_PROTO_ABI_X86_32 "x86_32-abi"
> +#define XEN_IO_PROTO_ABI_X86_64 "x86_64-abi"
> +#define XEN_IO_PROTO_ABI_ARM "arm-abi"
> +
> +#if defined(__i386__)
> +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_32
> +#elif defined(__x86_64__)
> +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_64
> +#elif defined(__arm__) || defined(__aarch64__)
> +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_ARM
> +#else
> +# error arch fixup needed here
> +#endif
> +
> +#endif
> diff --git a/include/hw/xen/io/ring.h b/include/hw/xen/interface/io/ring.h
> similarity index 100%
> rename from include/hw/xen/io/ring.h
> rename to include/hw/xen/interface/io/ring.h
> diff --git a/include/hw/xen/interface/io/usbif.h
> b/include/hw/xen/interface/io/usbif.h
> new file mode 100644
> index 0000000000..c6a58639d6
> --- /dev/null
> +++ b/include/hw/xen/interface/io/usbif.h
> @@ -0,0 +1,254 @@
> +/*
> + * usbif.h
> + *
> + * USB I/O interface for Xen guest OSes.
> + *
> + * Copyright (C) 2009, FUJITSU LABORATORIES LTD.
> + * Author: Noboru Iwamatsu <n_iwamatsu@xxxxxxxxxxxxxx>
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_USBIF_H__
> +#define __XEN_PUBLIC_IO_USBIF_H__
> +
> +#include "ring.h"
> +#include "../grant_table.h"
> +
> +/*
> + * Feature and Parameter Negotiation
> + * =================================
> + * The two halves of a Xen pvUSB driver utilize nodes within the XenStore to
> + * communicate capabilities and to negotiate operating parameters. This
> + * section enumerates these nodes which reside in the respective front and
> + * backend portions of the XenStore, following the XenBus convention.
> + *
> + * Any specified default value is in effect if the corresponding XenBus node
> + * is not present in the XenStore.
> + *
> + * XenStore nodes in sections marked "PRIVATE" are solely for use by the
> + * driver side whose XenBus tree contains them.
> + *
> +
> *****************************************************************************
> + * Backend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *------------------ Backend Device Identification (PRIVATE)
> ------------------
> + *
> + * num-ports
> + * Values: unsigned [1...31]
> + *
> + * Number of ports for this (virtual) USB host connector.
> + *
> + * usb-ver
> + * Values: unsigned [1...2]
> + *
> + * USB version of this host connector: 1 = USB 1.1, 2 = USB 2.0.
> + *
> + * port/[1...31]
> + * Values: string
> + *
> + * Physical USB device connected to the given port, e.g. "3-1.5".
> + *
> +
> *****************************************************************************
> + * Frontend XenBus Nodes
> +
> *****************************************************************************
> + *
> + *----------------------- Request Transport Parameters
> -----------------------
> + *
> + * event-channel
> + * Values: unsigned
> + *
> + * The identifier of the Xen event channel used to signal activity
> + * in the ring buffer.
> + *
> + * urb-ring-ref
> + * Values: unsigned
> + *
> + * The Xen grant reference granting permission for the backend to map
> + * the sole page in a single page sized ring buffer. This is the ring
> + * buffer for urb requests.
> + *
> + * conn-ring-ref
> + * Values: unsigned
> + *
> + * The Xen grant reference granting permission for the backend to map
> + * the sole page in a single page sized ring buffer. This is the ring
> + * buffer for connection/disconnection requests.
> + *
> + * protocol
> + * Values: string (XEN_IO_PROTO_ABI_*)
> + * Default Value: XEN_IO_PROTO_ABI_NATIVE
> + *
> + * The machine ABI rules governing the format of all ring request and
> + * response structures.
> + *
> + */
> +
> +enum usb_spec_version {
> + USB_VER_UNKNOWN = 0,
> + USB_VER_USB11,
> + USB_VER_USB20,
> + USB_VER_USB30, /* not supported yet */
> +};
> +
> +/*
> + * USB pipe in usbif_request
> + *
> + * - port number: bits 0-4
> + * (USB_MAXCHILDREN is 31)
> + *
> + * - operation flag: bit 5
> + * (0 = submit urb,
> + * 1 = unlink urb)
> + *
> + * - direction: bit 7
> + * (0 = Host-to-Device [Out]
> + * 1 = Device-to-Host [In])
> + *
> + * - device address: bits 8-14
> + *
> + * - endpoint: bits 15-18
> + *
> + * - pipe type: bits 30-31
> + * (00 = isochronous, 01 = interrupt,
> + * 10 = control, 11 = bulk)
> + */
> +
> +#define USBIF_PIPE_PORT_MASK 0x0000001f
> +#define USBIF_PIPE_UNLINK 0x00000020
> +#define USBIF_PIPE_DIR 0x00000080
> +#define USBIF_PIPE_DEV_MASK 0x0000007f
> +#define USBIF_PIPE_DEV_SHIFT 8
> +#define USBIF_PIPE_EP_MASK 0x0000000f
> +#define USBIF_PIPE_EP_SHIFT 15
> +#define USBIF_PIPE_TYPE_MASK 0x00000003
> +#define USBIF_PIPE_TYPE_SHIFT 30
> +#define USBIF_PIPE_TYPE_ISOC 0
> +#define USBIF_PIPE_TYPE_INT 1
> +#define USBIF_PIPE_TYPE_CTRL 2
> +#define USBIF_PIPE_TYPE_BULK 3
> +
> +#define usbif_pipeportnum(pipe) ((pipe) &
> USBIF_PIPE_PORT_MASK)
> +#define usbif_setportnum_pipe(pipe, portnum) ((pipe) | (portnum))
> +
> +#define usbif_pipeunlink(pipe) ((pipe) &
> USBIF_PIPE_UNLINK)
> +#define usbif_pipesubmit(pipe)
> (!usbif_pipeunlink(pipe))
> +#define usbif_setunlink_pipe(pipe) ((pipe) | USBIF_PIPE_UNLINK)
> +
> +#define usbif_pipein(pipe) ((pipe) & USBIF_PIPE_DIR)
> +#define usbif_pipeout(pipe) (!usbif_pipein(pipe))
> +
> +#define usbif_pipedevice(pipe) \
> + (((pipe) >> USBIF_PIPE_DEV_SHIFT) & USBIF_PIPE_DEV_MASK)
> +
> +#define usbif_pipeendpoint(pipe) \
> + (((pipe) >> USBIF_PIPE_EP_SHIFT) & USBIF_PIPE_EP_MASK)
> +
> +#define usbif_pipetype(pipe) \
> + (((pipe) >> USBIF_PIPE_TYPE_SHIFT) & USBIF_PIPE_TYPE_MASK)
> +#define usbif_pipeisoc(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_ISOC)
> +#define usbif_pipeint(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_INT)
> +#define usbif_pipectrl(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_CTRL)
> +#define usbif_pipebulk(pipe) (usbif_pipetype(pipe) == USBIF_PIPE_TYPE_BULK)
> +
> +#define USBIF_MAX_SEGMENTS_PER_REQUEST (16)
> +#define USBIF_MAX_PORTNR 31
> +#define USBIF_RING_SIZE 4096
> +
> +/*
> + * RING for transferring urbs.
> + */
> +struct usbif_request_segment {
> + grant_ref_t gref;
> + uint16_t offset;
> + uint16_t length;
> +};
> +
> +struct usbif_urb_request {
> + uint16_t id; /* request id */
> + uint16_t nr_buffer_segs; /* number of urb->transfer_buffer segments */
> +
> + /* basic urb parameter */
> + uint32_t pipe;
> + uint16_t transfer_flags;
> +#define USBIF_SHORT_NOT_OK 0x0001
> + uint16_t buffer_length;
> + union {
> + uint8_t ctrl[8]; /* setup_packet (Ctrl) */
> +
> + struct {
> + uint16_t interval; /* maximum (1024*8) in usb core */
> + uint16_t start_frame; /* start frame */
> + uint16_t number_of_packets; /* number of ISO packet */
> + uint16_t nr_frame_desc_segs; /* number of
> iso_frame_desc segments */
> + } isoc;
> +
> + struct {
> + uint16_t interval; /* maximum (1024*8) in usb core */
> + uint16_t pad[3];
> + } intr;
> +
> + struct {
> + uint16_t unlink_id; /* unlink request id */
> + uint16_t pad[3];
> + } unlink;
> +
> + } u;
> +
> + /* urb data segments */
> + struct usbif_request_segment seg[USBIF_MAX_SEGMENTS_PER_REQUEST];
> +};
> +typedef struct usbif_urb_request usbif_urb_request_t;
> +
> +struct usbif_urb_response {
> + uint16_t id; /* request id */
> + uint16_t start_frame; /* start frame (ISO) */
> + int32_t status; /* status (non-ISO) */
> + int32_t actual_length; /* actual transfer length */
> + int32_t error_count; /* number of ISO errors */
> +};
> +typedef struct usbif_urb_response usbif_urb_response_t;
> +
> +DEFINE_RING_TYPES(usbif_urb, struct usbif_urb_request, struct
> usbif_urb_response);
> +#define USB_URB_RING_SIZE __CONST_RING_SIZE(usbif_urb, USBIF_RING_SIZE)
> +
> +/*
> + * RING for notifying connect/disconnect events to frontend
> + */
> +struct usbif_conn_request {
> + uint16_t id;
> +};
> +typedef struct usbif_conn_request usbif_conn_request_t;
> +
> +struct usbif_conn_response {
> + uint16_t id; /* request id */
> + uint8_t portnum; /* port number */
> + uint8_t speed; /* usb_device_speed */
> +#define USBIF_SPEED_NONE 0
> +#define USBIF_SPEED_LOW 1
> +#define USBIF_SPEED_FULL 2
> +#define USBIF_SPEED_HIGH 3
> +};
> +typedef struct usbif_conn_response usbif_conn_response_t;
> +
> +DEFINE_RING_TYPES(usbif_conn, struct usbif_conn_request, struct
> usbif_conn_response);
> +#define USB_CONN_RING_SIZE __CONST_RING_SIZE(usbif_conn, USBIF_RING_SIZE)
> +
> +#endif /* __XEN_PUBLIC_IO_USBIF_H__ */
> diff --git a/include/hw/xen/interface/io/xenbus.h
> b/include/hw/xen/interface/io/xenbus.h
> new file mode 100644
> index 0000000000..2fbf2a7fdc
> --- /dev/null
> +++ b/include/hw/xen/interface/io/xenbus.h
> @@ -0,0 +1,70 @@
> +/*****************************************************************************
> + * xenbus.h
> + *
> + * Xenbus protocol details.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense,
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (C) 2005 XenSource Ltd.
> + */
> +
> +#ifndef _XEN_PUBLIC_IO_XENBUS_H
> +#define _XEN_PUBLIC_IO_XENBUS_H
> +
> +/*
> + * The state of either end of the Xenbus, i.e. the current communication
> + * status of initialisation across the bus. States here imply nothing about
> + * the state of the connection between the driver and the kernel's device
> + * layers.
> + */
> +enum xenbus_state {
> + XenbusStateUnknown = 0,
> +
> + XenbusStateInitialising = 1,
> +
> + /*
> + * InitWait: Finished early initialisation but waiting for information
> + * from the peer or hotplug scripts.
> + */
> + XenbusStateInitWait = 2,
> +
> + /*
> + * Initialised: Waiting for a connection from the peer.
> + */
> + XenbusStateInitialised = 3,
> +
> + XenbusStateConnected = 4,
> +
> + /*
> + * Closing: The device is being closed due to an error or an unplug
> event.
> + */
> + XenbusStateClosing = 5,
> +
> + XenbusStateClosed = 6,
> +
> + /*
> + * Reconfiguring: The device is being reconfigured.
> + */
> + XenbusStateReconfiguring = 7,
> +
> + XenbusStateReconfigured = 8
> +};
> +typedef enum xenbus_state XenbusState;
> +
> +#endif /* _XEN_PUBLIC_IO_XENBUS_H */
> diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
> index 9a8155e172..0504b43659 100644
> --- a/include/hw/xen/xen_common.h
> +++ b/include/hw/xen/xen_common.h
> @@ -12,7 +12,7 @@
>
> #include <xenctrl.h>
> #include <xenstore.h>
> -#include <xen/io/xenbus.h>
> +#include "hw/xen/interface/io/xenbus.h"
>
> #include "hw/hw.h"
> #include "hw/xen/xen.h"
> --
> Anthony PERARD
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