uapi/xen/gntdev.h

1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) */
41 	/* The domain ID of the grant to be mapped. */
43 	/* The grant reference of the grant to be mapped. */
48  * Inserts the grant references into the mapping table of an instance
51  * considered opaque to userspace, with one exception: if no grant
69 	/* Array of grant references, of size @count. */
74  * Removes the grant references from the mapping table of an instance of
99  *      contiguously-allocated range at once, and not any subrange thereof.
131  * cleanup if this side crashes. Required to implement cross-domain robust
171  * Copy between grant references and local buffers.
174  * to/from one grant reference.
180  * The local buffer may cross a Xen page boundary -- the driver will
191  * If -1 is returned, the status of all segments is undefined.
212  * to be allocated with DMA API.
226  * Create a dma-buf [1] from grant references @refs of count @count provided
229  * By default dma-buf is backed by system memory pages, but by providing
231  * a DMA write-combine or coherent buffer, e.g. allocated with dma_alloc_wc/
234  * Returns 0 if dma-buf was successfully created and the corresponding
235  * dma-buf's file descriptor is returned in @fd.
237  * [1] Documentation/driver-api/dma-buf.rst
245 	/* Specific options for this dma-buf: see GNTDEV_DMA_FLAG_XXX. */
247 	/* Number of grant references in @refs array. */
250 	/* File descriptor of the dma-buf. */
252 	/* The domain ID of the grant references to be mapped. */
255 	/* Array of grant references of size @count. */
260  * This will block until the dma-buf with the file descriptor @fd is
265  * then -ETIMEDOUT error is returned.
267  * been released, then -ENOENT is returned. For valid file descriptors
280  * Import a dma-buf with file descriptor @fd and export granted references
281  * to the pages of that dma-buf into array @refs of size @count.
288 	/* File descriptor of the dma-buf. */
290 	/* Number of grant references in @refs array. */
294 	/* Reserved - must be zero. */
297 	/* Array of grant references of size @count. */