Restoring authorship annotation for <[email protected]>. Commit 2 of 2.

1 files changed, 303 insertions, 303 deletions

diff --git a/contrib/libs/linux-headers/xen/gntdev.h b/contrib/libs/linux-headers/xen/gntdev.h
index 1f50422fb96..2b79b49aeb1 100644
--- a/contrib/libs/linux-headers/xen/gntdev.h
+++ b/contrib/libs/linux-headers/xen/gntdev.h
@@ -1,309 +1,309 @@
-/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */ 
-/****************************************************************************** 
- * gntdev.h 
- *  
- * Interface to /dev/xen/gntdev. 
- *  
- * Copyright (c) 2007, D G Murray 
- * Copyright (c) 2018, Oleksandr Andrushchenko, EPAM Systems Inc. 
- *  
- * This program is free software; you can redistribute it and/or 
- * modify it under the terms of the GNU General Public License version 2 
- * as published by the Free Software Foundation; or, when distributed 
- * separately from the Linux kernel or incorporated into other 
- * software packages, subject to the following license: 
- *  
- * Permission is hereby granted, free of charge, to any person obtaining a copy 
- * of this source file (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 __LINUX_PUBLIC_GNTDEV_H__ 
-#define __LINUX_PUBLIC_GNTDEV_H__ 
- 
-#include <linux/types.h> 
- 
-struct ioctl_gntdev_grant_ref { 
-	/* The domain ID of the grant to be mapped. */ 
-	__u32 domid; 
-	/* The grant reference of the grant to be mapped. */ 
-	__u32 ref; 
-}; 
- 
-/* 
- * Inserts the grant references into the mapping table of an instance 
- * of gntdev. N.B. This does not perform the mapping, which is deferred 
- * until mmap() is called with @index as the offset. 
- */ 
-#define IOCTL_GNTDEV_MAP_GRANT_REF \ 
-_IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref)) 
-struct ioctl_gntdev_map_grant_ref { 
-	/* IN parameters */ 
-	/* The number of grants to be mapped. */ 
-	__u32 count; 
-	__u32 pad; 
-	/* OUT parameters */ 
-	/* The offset to be used on a subsequent call to mmap(). */ 
-	__u64 index; 
-	/* Variable IN parameter. */ 
-	/* Array of grant references, of size @count. */ 
-	struct ioctl_gntdev_grant_ref refs[1]; 
-}; 
- 
-/* 
- * Removes the grant references from the mapping table of an instance of 
- * of gntdev. N.B. munmap() must be called on the relevant virtual address(es) 
- * before this ioctl is called, or an error will result. 
- */ 
-#define IOCTL_GNTDEV_UNMAP_GRANT_REF \ 
-_IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref)) 
-struct ioctl_gntdev_unmap_grant_ref { 
-	/* IN parameters */ 
-	/* The offset was returned by the corresponding map operation. */ 
-	__u64 index; 
-	/* The number of pages to be unmapped. */ 
-	__u32 count; 
-	__u32 pad; 
-}; 
- 
-/* 
- * Returns the offset in the driver's address space that corresponds 
- * to @vaddr. This can be used to perform a munmap(), followed by an 
- * UNMAP_GRANT_REF ioctl, where no state about the offset is retained by 
- * the caller. The number of pages that were allocated at the same time as 
- * @vaddr is returned in @count. 
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */
+/******************************************************************************
+ * gntdev.h
  * 
- * N.B. Where more than one page has been mapped into a contiguous range, the 
- *      supplied @vaddr must correspond to the start of the range; otherwise 
- *      an error will result. It is only possible to munmap() the entire 
- *      contiguously-allocated range at once, and not any subrange thereof. 
- */ 
-#define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR \ 
-_IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr)) 
-struct ioctl_gntdev_get_offset_for_vaddr { 
-	/* IN parameters */ 
-	/* The virtual address of the first mapped page in a range. */ 
-	__u64 vaddr; 
-	/* OUT parameters */ 
-	/* The offset that was used in the initial mmap() operation. */ 
-	__u64 offset; 
-	/* The number of pages mapped in the VM area that begins at @vaddr. */ 
-	__u32 count; 
-	__u32 pad; 
-}; 
- 
-/* 
- * Sets the maximum number of grants that may mapped at once by this gntdev 
- * instance. 
+ * Interface to /dev/xen/gntdev.
  * 
- * N.B. This must be called before any other ioctl is performed on the device. 
- */ 
-#define IOCTL_GNTDEV_SET_MAX_GRANTS \ 
-_IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants)) 
-struct ioctl_gntdev_set_max_grants { 
-	/* IN parameter */ 
-	/* The maximum number of grants that may be mapped at once. */ 
-	__u32 count; 
-}; 
- 
-/* 
- * Sets up an unmap notification within the page, so that the other side can do 
- * cleanup if this side crashes. Required to implement cross-domain robust 
- * mutexes or close notification on communication channels. 
+ * Copyright (c) 2007, D G Murray
+ * Copyright (c) 2018, Oleksandr Andrushchenko, EPAM Systems Inc.
  * 
- * Each mapped page only supports one notification; multiple calls referring to 
- * the same page overwrite the previous notification. You must clear the 
- * notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it 
- * to occur. 
- */ 
-#define IOCTL_GNTDEV_SET_UNMAP_NOTIFY \ 
-_IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntdev_unmap_notify)) 
-struct ioctl_gntdev_unmap_notify { 
-	/* IN parameters */ 
-	/* Offset in the file descriptor for a byte within the page (same as 
-	 * used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to 
-	 * be cleared. Otherwise, it can be any byte in the page whose 
-	 * notification we are adjusting. 
-	 */ 
-	__u64 index; 
-	/* Action(s) to take on unmap */ 
-	__u32 action; 
-	/* Event channel to notify */ 
-	__u32 event_channel_port; 
-}; 
- 
-struct gntdev_grant_copy_segment { 
-	union { 
-		void *virt; 
-		struct { 
-			grant_ref_t ref; 
-			__u16 offset; 
-			domid_t domid; 
-		} foreign; 
-	} source, dest; 
-	__u16 len; 
- 
-	__u16 flags;  /* GNTCOPY_* */ 
-	__s16 status; /* GNTST_* */ 
-}; 
- 
-/* 
- * Copy between grant references and local buffers. 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
  * 
- * The copy is split into @count @segments, each of which can copy 
- * to/from one grant reference. 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (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:
  * 
- * Each segment is similar to struct gnttab_copy in the hypervisor ABI 
- * except the local buffer is specified using a virtual address 
- * (instead of a GFN and offset). 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
  * 
- * The local buffer may cross a Xen page boundary -- the driver will 
- * split segments into multiple ops if required. 
- * 
- * Returns 0 if all segments have been processed and @status in each 
- * segment is valid.  Note that one or more segments may have failed 
- * (status != GNTST_okay). 
- * 
- * If the driver had to split a segment into two or more ops, @status 
- * includes the status of the first failed op for that segment (or 
- * GNTST_okay if all ops were successful). 
- * 
- * If -1 is returned, the status of all segments is undefined. 
- * 
- * EINVAL: A segment has local buffers for both source and 
- *         destination. 
- * EINVAL: A segment crosses the boundary of a foreign page. 
- * EFAULT: A segment's local buffer is not accessible. 
- */ 
-#define IOCTL_GNTDEV_GRANT_COPY \ 
-	_IOC(_IOC_NONE, 'G', 8, sizeof(struct ioctl_gntdev_grant_copy)) 
-struct ioctl_gntdev_grant_copy { 
-	unsigned int count; 
-	struct gntdev_grant_copy_segment *segments; 
-}; 
- 
-/* Clear (set to zero) the byte specified by index */ 
-#define UNMAP_NOTIFY_CLEAR_BYTE 0x1 
-/* Send an interrupt on the indicated event channel */ 
-#define UNMAP_NOTIFY_SEND_EVENT 0x2 
- 
-/* 
- * Flags to be used while requesting memory mapping's backing storage 
- * to be allocated with DMA API. 
- */ 
- 
-/* 
- * The buffer is backed with memory allocated with dma_alloc_wc. 
- */ 
-#define GNTDEV_DMA_FLAG_WC		(1 << 0) 
- 
-/* 
- * The buffer is backed with memory allocated with dma_alloc_coherent. 
- */ 
-#define GNTDEV_DMA_FLAG_COHERENT	(1 << 1) 
- 
-/* 
- * Create a dma-buf [1] from grant references @refs of count @count provided 
- * by the foreign domain @domid with flags @flags. 
- * 
- * By default dma-buf is backed by system memory pages, but by providing 
- * one of the GNTDEV_DMA_FLAG_XXX flags it can also be created as 
- * a DMA write-combine or coherent buffer, e.g. allocated with dma_alloc_wc/ 
- * dma_alloc_coherent. 
- * 
- * Returns 0 if dma-buf was successfully created and the corresponding 
- * dma-buf's file descriptor is returned in @fd. 
- * 
- * [1] Documentation/driver-api/dma-buf.rst 
- */ 
- 
-#define IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS \ 
-	_IOC(_IOC_NONE, 'G', 9, \ 
-	     sizeof(struct ioctl_gntdev_dmabuf_exp_from_refs)) 
-struct ioctl_gntdev_dmabuf_exp_from_refs { 
-	/* IN parameters. */ 
-	/* Specific options for this dma-buf: see GNTDEV_DMA_FLAG_XXX. */ 
-	__u32 flags; 
-	/* Number of grant references in @refs array. */ 
-	__u32 count; 
-	/* OUT parameters. */ 
-	/* File descriptor of the dma-buf. */ 
-	__u32 fd; 
-	/* The domain ID of the grant references to be mapped. */ 
-	__u32 domid; 
-	/* Variable IN parameter. */ 
-	/* Array of grant references of size @count. */ 
-	__u32 refs[1]; 
-}; 
- 
-/* 
- * This will block until the dma-buf with the file descriptor @fd is 
- * released. This is only valid for buffers created with 
- * IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS. 
- * 
- * If within @wait_to_ms milliseconds the buffer is not released 
- * then -ETIMEDOUT error is returned. 
- * If the buffer with the file descriptor @fd does not exist or has already 
- * been released, then -ENOENT is returned. For valid file descriptors 
- * this must not be treated as error. 
- */ 
-#define IOCTL_GNTDEV_DMABUF_EXP_WAIT_RELEASED \ 
-	_IOC(_IOC_NONE, 'G', 10, \ 
-	     sizeof(struct ioctl_gntdev_dmabuf_exp_wait_released)) 
-struct ioctl_gntdev_dmabuf_exp_wait_released { 
-	/* IN parameters */ 
-	__u32 fd; 
-	__u32 wait_to_ms; 
-}; 
- 
-/* 
- * Import a dma-buf with file descriptor @fd and export granted references 
- * to the pages of that dma-buf into array @refs of size @count. 
- */ 
-#define IOCTL_GNTDEV_DMABUF_IMP_TO_REFS \ 
-	_IOC(_IOC_NONE, 'G', 11, \ 
-	     sizeof(struct ioctl_gntdev_dmabuf_imp_to_refs)) 
-struct ioctl_gntdev_dmabuf_imp_to_refs { 
-	/* IN parameters. */ 
-	/* File descriptor of the dma-buf. */ 
-	__u32 fd; 
-	/* Number of grant references in @refs array. */ 
-	__u32 count; 
-	/* The domain ID for which references to be granted. */ 
-	__u32 domid; 
-	/* Reserved - must be zero. */ 
-	__u32 reserved; 
-	/* OUT parameters. */ 
-	/* Array of grant references of size @count. */ 
-	__u32 refs[1]; 
-}; 
- 
-/* 
- * This will close all references to the imported buffer with file descriptor 
- * @fd, so it can be released by the owner. This is only valid for buffers 
- * created with IOCTL_GNTDEV_DMABUF_IMP_TO_REFS. 
- */ 
-#define IOCTL_GNTDEV_DMABUF_IMP_RELEASE \ 
-	_IOC(_IOC_NONE, 'G', 12, \ 
-	     sizeof(struct ioctl_gntdev_dmabuf_imp_release)) 
-struct ioctl_gntdev_dmabuf_imp_release { 
-	/* IN parameters */ 
-	__u32 fd; 
-	__u32 reserved; 
-}; 
- 
-#endif /* __LINUX_PUBLIC_GNTDEV_H__ */ 
+ * 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 __LINUX_PUBLIC_GNTDEV_H__
+#define __LINUX_PUBLIC_GNTDEV_H__
+
+#include <linux/types.h>
+
+struct ioctl_gntdev_grant_ref {
+	/* The domain ID of the grant to be mapped. */
+	__u32 domid;
+	/* The grant reference of the grant to be mapped. */
+	__u32 ref;
+};
+
+/*
+ * Inserts the grant references into the mapping table of an instance
+ * of gntdev. N.B. This does not perform the mapping, which is deferred
+ * until mmap() is called with @index as the offset.
+ */
+#define IOCTL_GNTDEV_MAP_GRANT_REF \
+_IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref))
+struct ioctl_gntdev_map_grant_ref {
+	/* IN parameters */
+	/* The number of grants to be mapped. */
+	__u32 count;
+	__u32 pad;
+	/* OUT parameters */
+	/* The offset to be used on a subsequent call to mmap(). */
+	__u64 index;
+	/* Variable IN parameter. */
+	/* Array of grant references, of size @count. */
+	struct ioctl_gntdev_grant_ref refs[1];
+};
+
+/*
+ * Removes the grant references from the mapping table of an instance of
+ * of gntdev. N.B. munmap() must be called on the relevant virtual address(es)
+ * before this ioctl is called, or an error will result.
+ */
+#define IOCTL_GNTDEV_UNMAP_GRANT_REF \
+_IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref))
+struct ioctl_gntdev_unmap_grant_ref {
+	/* IN parameters */
+	/* The offset was returned by the corresponding map operation. */
+	__u64 index;
+	/* The number of pages to be unmapped. */
+	__u32 count;
+	__u32 pad;
+};
+
+/*
+ * Returns the offset in the driver's address space that corresponds
+ * to @vaddr. This can be used to perform a munmap(), followed by an
+ * UNMAP_GRANT_REF ioctl, where no state about the offset is retained by
+ * the caller. The number of pages that were allocated at the same time as
+ * @vaddr is returned in @count.
+ *
+ * N.B. Where more than one page has been mapped into a contiguous range, the
+ *      supplied @vaddr must correspond to the start of the range; otherwise
+ *      an error will result. It is only possible to munmap() the entire
+ *      contiguously-allocated range at once, and not any subrange thereof.
+ */
+#define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR \
+_IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr))
+struct ioctl_gntdev_get_offset_for_vaddr {
+	/* IN parameters */
+	/* The virtual address of the first mapped page in a range. */
+	__u64 vaddr;
+	/* OUT parameters */
+	/* The offset that was used in the initial mmap() operation. */
+	__u64 offset;
+	/* The number of pages mapped in the VM area that begins at @vaddr. */
+	__u32 count;
+	__u32 pad;
+};
+
+/*
+ * Sets the maximum number of grants that may mapped at once by this gntdev
+ * instance.
+ *
+ * N.B. This must be called before any other ioctl is performed on the device.
+ */
+#define IOCTL_GNTDEV_SET_MAX_GRANTS \
+_IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants))
+struct ioctl_gntdev_set_max_grants {
+	/* IN parameter */
+	/* The maximum number of grants that may be mapped at once. */
+	__u32 count;
+};
+
+/*
+ * Sets up an unmap notification within the page, so that the other side can do
+ * cleanup if this side crashes. Required to implement cross-domain robust
+ * mutexes or close notification on communication channels.
+ *
+ * Each mapped page only supports one notification; multiple calls referring to
+ * the same page overwrite the previous notification. You must clear the
+ * notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it
+ * to occur.
+ */
+#define IOCTL_GNTDEV_SET_UNMAP_NOTIFY \
+_IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntdev_unmap_notify))
+struct ioctl_gntdev_unmap_notify {
+	/* IN parameters */
+	/* Offset in the file descriptor for a byte within the page (same as
+	 * used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to
+	 * be cleared. Otherwise, it can be any byte in the page whose
+	 * notification we are adjusting.
+	 */
+	__u64 index;
+	/* Action(s) to take on unmap */
+	__u32 action;
+	/* Event channel to notify */
+	__u32 event_channel_port;
+};
+
+struct gntdev_grant_copy_segment {
+	union {
+		void *virt;
+		struct {
+			grant_ref_t ref;
+			__u16 offset;
+			domid_t domid;
+		} foreign;
+	} source, dest;
+	__u16 len;
+
+	__u16 flags;  /* GNTCOPY_* */
+	__s16 status; /* GNTST_* */
+};
+
+/*
+ * Copy between grant references and local buffers.
+ *
+ * The copy is split into @count @segments, each of which can copy
+ * to/from one grant reference.
+ *
+ * Each segment is similar to struct gnttab_copy in the hypervisor ABI
+ * except the local buffer is specified using a virtual address
+ * (instead of a GFN and offset).
+ *
+ * The local buffer may cross a Xen page boundary -- the driver will
+ * split segments into multiple ops if required.
+ *
+ * Returns 0 if all segments have been processed and @status in each
+ * segment is valid.  Note that one or more segments may have failed
+ * (status != GNTST_okay).
+ *
+ * If the driver had to split a segment into two or more ops, @status
+ * includes the status of the first failed op for that segment (or
+ * GNTST_okay if all ops were successful).
+ *
+ * If -1 is returned, the status of all segments is undefined.
+ *
+ * EINVAL: A segment has local buffers for both source and
+ *         destination.
+ * EINVAL: A segment crosses the boundary of a foreign page.
+ * EFAULT: A segment's local buffer is not accessible.
+ */
+#define IOCTL_GNTDEV_GRANT_COPY \
+	_IOC(_IOC_NONE, 'G', 8, sizeof(struct ioctl_gntdev_grant_copy))
+struct ioctl_gntdev_grant_copy {
+	unsigned int count;
+	struct gntdev_grant_copy_segment *segments;
+};
+
+/* Clear (set to zero) the byte specified by index */
+#define UNMAP_NOTIFY_CLEAR_BYTE 0x1
+/* Send an interrupt on the indicated event channel */
+#define UNMAP_NOTIFY_SEND_EVENT 0x2
+
+/*
+ * Flags to be used while requesting memory mapping's backing storage
+ * to be allocated with DMA API.
+ */
+
+/*
+ * The buffer is backed with memory allocated with dma_alloc_wc.
+ */
+#define GNTDEV_DMA_FLAG_WC		(1 << 0)
+
+/*
+ * The buffer is backed with memory allocated with dma_alloc_coherent.
+ */
+#define GNTDEV_DMA_FLAG_COHERENT	(1 << 1)
+
+/*
+ * Create a dma-buf [1] from grant references @refs of count @count provided
+ * by the foreign domain @domid with flags @flags.
+ *
+ * By default dma-buf is backed by system memory pages, but by providing
+ * one of the GNTDEV_DMA_FLAG_XXX flags it can also be created as
+ * a DMA write-combine or coherent buffer, e.g. allocated with dma_alloc_wc/
+ * dma_alloc_coherent.
+ *
+ * Returns 0 if dma-buf was successfully created and the corresponding
+ * dma-buf's file descriptor is returned in @fd.
+ *
+ * [1] Documentation/driver-api/dma-buf.rst
+ */
+
+#define IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS \
+	_IOC(_IOC_NONE, 'G', 9, \
+	     sizeof(struct ioctl_gntdev_dmabuf_exp_from_refs))
+struct ioctl_gntdev_dmabuf_exp_from_refs {
+	/* IN parameters. */
+	/* Specific options for this dma-buf: see GNTDEV_DMA_FLAG_XXX. */
+	__u32 flags;
+	/* Number of grant references in @refs array. */
+	__u32 count;
+	/* OUT parameters. */
+	/* File descriptor of the dma-buf. */
+	__u32 fd;
+	/* The domain ID of the grant references to be mapped. */
+	__u32 domid;
+	/* Variable IN parameter. */
+	/* Array of grant references of size @count. */
+	__u32 refs[1];
+};
+
+/*
+ * This will block until the dma-buf with the file descriptor @fd is
+ * released. This is only valid for buffers created with
+ * IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS.
+ *
+ * If within @wait_to_ms milliseconds the buffer is not released
+ * then -ETIMEDOUT error is returned.
+ * If the buffer with the file descriptor @fd does not exist or has already
+ * been released, then -ENOENT is returned. For valid file descriptors
+ * this must not be treated as error.
+ */
+#define IOCTL_GNTDEV_DMABUF_EXP_WAIT_RELEASED \
+	_IOC(_IOC_NONE, 'G', 10, \
+	     sizeof(struct ioctl_gntdev_dmabuf_exp_wait_released))
+struct ioctl_gntdev_dmabuf_exp_wait_released {
+	/* IN parameters */
+	__u32 fd;
+	__u32 wait_to_ms;
+};
+
+/*
+ * Import a dma-buf with file descriptor @fd and export granted references
+ * to the pages of that dma-buf into array @refs of size @count.
+ */
+#define IOCTL_GNTDEV_DMABUF_IMP_TO_REFS \
+	_IOC(_IOC_NONE, 'G', 11, \
+	     sizeof(struct ioctl_gntdev_dmabuf_imp_to_refs))
+struct ioctl_gntdev_dmabuf_imp_to_refs {
+	/* IN parameters. */
+	/* File descriptor of the dma-buf. */
+	__u32 fd;
+	/* Number of grant references in @refs array. */
+	__u32 count;
+	/* The domain ID for which references to be granted. */
+	__u32 domid;
+	/* Reserved - must be zero. */
+	__u32 reserved;
+	/* OUT parameters. */
+	/* Array of grant references of size @count. */
+	__u32 refs[1];
+};
+
+/*
+ * This will close all references to the imported buffer with file descriptor
+ * @fd, so it can be released by the owner. This is only valid for buffers
+ * created with IOCTL_GNTDEV_DMABUF_IMP_TO_REFS.
+ */
+#define IOCTL_GNTDEV_DMABUF_IMP_RELEASE \
+	_IOC(_IOC_NONE, 'G', 12, \
+	     sizeof(struct ioctl_gntdev_dmabuf_imp_release))
+struct ioctl_gntdev_dmabuf_imp_release {
+	/* IN parameters */
+	__u32 fd;
+	__u32 reserved;
+};
+
+#endif /* __LINUX_PUBLIC_GNTDEV_H__ */