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9e2b3e834c
Commit b24413180f ("License cleanup: add SPDX GPL-2.0 license
identifier to files with no license") was meant to do a tree-wide
cleanup for files without any license information by adding a SPDX
GPL-2.0 line to them.
Unfortunately this was applied even to several Xen-related headers
which have been originally under the MIT license, but obviously have
been copied to the Linux tree from the Xen project without keeping the
license boiler plate as required.
Correct that by changing the license of those files back to "MIT".
Some files still contain the MIT license text. Replace that by the
related SPDX line.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20211015143312.29900-1-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* fbif.h -- Xen virtual frame buffer device
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*
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* Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
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* Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
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*/
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#ifndef __XEN_PUBLIC_IO_FBIF_H__
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#define __XEN_PUBLIC_IO_FBIF_H__
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/* Out events (frontend -> backend) */
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/*
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* Out events may be sent only when requested by backend, and receipt
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* of an unknown out event is an error.
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*/
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/* Event type 1 currently not used */
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/*
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* Framebuffer update notification event
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* Capable frontend sets feature-update in xenstore.
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* Backend requests it by setting request-update in xenstore.
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*/
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#define XENFB_TYPE_UPDATE 2
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struct xenfb_update {
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uint8_t type; /* XENFB_TYPE_UPDATE */
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int32_t x; /* source x */
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int32_t y; /* source y */
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int32_t width; /* rect width */
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int32_t height; /* rect height */
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};
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/*
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* Framebuffer resize notification event
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* Capable backend sets feature-resize in xenstore.
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*/
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#define XENFB_TYPE_RESIZE 3
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struct xenfb_resize {
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uint8_t type; /* XENFB_TYPE_RESIZE */
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int32_t width; /* width in pixels */
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int32_t height; /* height in pixels */
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int32_t stride; /* stride in bytes */
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int32_t depth; /* depth in bits */
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int32_t offset; /* start offset within framebuffer */
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};
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#define XENFB_OUT_EVENT_SIZE 40
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union xenfb_out_event {
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uint8_t type;
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struct xenfb_update update;
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struct xenfb_resize resize;
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char pad[XENFB_OUT_EVENT_SIZE];
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};
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/* In events (backend -> frontend) */
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/*
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* Frontends should ignore unknown in events.
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* No in events currently defined.
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*/
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#define XENFB_IN_EVENT_SIZE 40
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union xenfb_in_event {
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uint8_t type;
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char pad[XENFB_IN_EVENT_SIZE];
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};
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/* shared page */
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#define XENFB_IN_RING_SIZE 1024
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#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
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#define XENFB_IN_RING_OFFS 1024
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#define XENFB_IN_RING(page) \
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((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
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#define XENFB_IN_RING_REF(page, idx) \
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(XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
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#define XENFB_OUT_RING_SIZE 2048
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#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
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#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
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#define XENFB_OUT_RING(page) \
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((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
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#define XENFB_OUT_RING_REF(page, idx) \
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(XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
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struct xenfb_page {
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uint32_t in_cons, in_prod;
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uint32_t out_cons, out_prod;
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int32_t width; /* width of the framebuffer (in pixels) */
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int32_t height; /* height of the framebuffer (in pixels) */
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uint32_t line_length; /* length of a row of pixels (in bytes) */
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uint32_t mem_length; /* length of the framebuffer (in bytes) */
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uint8_t depth; /* depth of a pixel (in bits) */
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/*
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* Framebuffer page directory
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*
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* Each directory page holds PAGE_SIZE / sizeof(*pd)
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* framebuffer pages, and can thus map up to PAGE_SIZE *
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* PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
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* sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2
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* Megs 64 bit. 256 directories give enough room for a 512
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* Meg framebuffer with a max resolution of 12,800x10,240.
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* Should be enough for a while with room leftover for
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* expansion.
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*/
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unsigned long pd[256];
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};
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/*
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* Wart: xenkbd needs to know default resolution. Put it here until a
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* better solution is found, but don't leak it to the backend.
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*/
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#ifdef __KERNEL__
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#define XENFB_WIDTH 800
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#define XENFB_HEIGHT 600
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#define XENFB_DEPTH 32
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#endif
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#endif
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