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143 lines
4.5 KiB
143 lines
4.5 KiB
/* |
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* fbif.h -- Xen virtual frame buffer device |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to |
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* deal in the Software without restriction, including without limitation the |
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
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* sell copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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* DEALINGS IN THE SOFTWARE. |
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* |
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* Copyright (C) 2005 Anthony Liguori <[email protected]> |
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* Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <[email protected]> |
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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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