forked from Minki/linux
e546e281d3
This patch introduces a guest's framebuffer sharing mechanism based on dma-buf subsystem. With this sharing mechanism, guest's framebuffer can be shared between guest VM and host. v17: - modify VFIO_DEVICE_GET_GFX_DMABUF interface. (Alex) v16: - add x_hot and y_hot. (Gerd) - add flag validation for VFIO_DEVICE_GET_GFX_DMABUF. (Alex) - rebase 4.14.0-rc6. v15: - add VFIO_DEVICE_GET_GFX_DMABUF ABI. (Gerd) - add intel_vgpu_dmabuf_cleanup() to clean up the vGPU's dmabuf. (Gerd) v14: - add PROBE, DMABUF and REGION flags. (Alex) v12: - refine the lifecycle of dmabuf. v9: - remove dma-buf management. (Alex) - track the dma-buf create and release in kernel mode. (Gerd) (Daniel) v8: - refine the dma-buf ioctl definition.(Alex) - add a lock to protect the dmabuf list. (Alex) v7: - release dma-buf related allocations in dma-buf's associated release function. (Alex) - refine ioctl interface for querying plane info or create dma-buf. (Alex) v6: - align the dma-buf life cycle with the vfio device. (Alex) - add the dma-buf related operations in a separate patch. (Gerd) - i915 related changes. (Chris) v5: - fix bug while checking whether the gem obj is gvt's dma-buf when user change caching mode or domains. Add a helper function to do it. (Xiaoguang) - add definition for the query plane and create dma-buf. (Xiaoguang) v4: - fix bug while checking whether the gem obj is gvt's dma-buf when set caching mode or doamins. (Xiaoguang) v3: - declare a new flag I915_GEM_OBJECT_IS_GVT_DMABUF in drm_i915_gem_object to represent the gem obj for gvt's dma-buf. The tiling mode, caching mode and domains can not be changed for this kind of gem object. (Alex) - change dma-buf related information to be more generic. So other vendor can use the same interface. (Alex) v2: - create a management fd for dma-buf operations. (Alex) - alloc gem object's backing storage in gem obj's get_pages() callback. (Chris) Signed-off-by: Tina Zhang <tina.zhang@intel.com> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
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* Copyright(c) 2017 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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
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* THE 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Zhiyuan Lv <zhiyuan.lv@intel.com>
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*
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* Contributors:
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* Xiaoguang Chen
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* Tina Zhang <tina.zhang@intel.com>
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*/
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#ifndef _GVT_DMABUF_H_
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#define _GVT_DMABUF_H_
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#include <linux/vfio.h>
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struct intel_vgpu_fb_info {
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__u64 start;
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__u64 start_gpa;
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__u64 drm_format_mod;
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__u32 drm_format; /* drm format of plane */
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__u32 width; /* width of plane */
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__u32 height; /* height of plane */
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__u32 stride; /* stride of plane */
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__u32 size; /* size of plane in bytes, align on page */
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__u32 x_pos; /* horizontal position of cursor plane */
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__u32 y_pos; /* vertical position of cursor plane */
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__u32 x_hot; /* horizontal position of cursor hotspot */
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__u32 y_hot; /* vertical position of cursor hotspot */
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struct intel_vgpu_dmabuf_obj *obj;
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};
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/**
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* struct intel_vgpu_dmabuf_obj- Intel vGPU device buffer object
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*/
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struct intel_vgpu_dmabuf_obj {
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struct intel_vgpu *vgpu;
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struct intel_vgpu_fb_info *info;
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__u32 dmabuf_id;
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struct kref kref;
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bool initref;
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struct list_head list;
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};
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int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args);
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int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id);
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void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu);
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#endif
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