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>
67 lines
2.6 KiB
C
67 lines
2.6 KiB
C
/*
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* Copyright(c) 2011-2016 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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* Eddie Dong <eddie.dong@intel.com>
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* Dexuan Cui
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* Jike Song <jike.song@intel.com>
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*
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* Contributors:
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#ifndef _GVT_HYPERCALL_H_
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#define _GVT_HYPERCALL_H_
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/*
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* Specific GVT-g MPT modules function collections. Currently GVT-g supports
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* both Xen and KVM by providing dedicated hypervisor-related MPT modules.
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*/
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struct intel_gvt_mpt {
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int (*host_init)(struct device *dev, void *gvt, const void *ops);
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void (*host_exit)(struct device *dev, void *gvt);
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int (*attach_vgpu)(void *vgpu, unsigned long *handle);
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void (*detach_vgpu)(unsigned long handle);
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int (*inject_msi)(unsigned long handle, u32 addr, u16 data);
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unsigned long (*from_virt_to_mfn)(void *p);
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int (*set_wp_page)(unsigned long handle, u64 gfn);
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int (*unset_wp_page)(unsigned long handle, u64 gfn);
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int (*read_gpa)(unsigned long handle, unsigned long gpa, void *buf,
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unsigned long len);
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int (*write_gpa)(unsigned long handle, unsigned long gpa, void *buf,
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unsigned long len);
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unsigned long (*gfn_to_mfn)(unsigned long handle, unsigned long gfn);
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int (*map_gfn_to_mfn)(unsigned long handle, unsigned long gfn,
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unsigned long mfn, unsigned int nr, bool map);
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int (*set_trap_area)(unsigned long handle, u64 start, u64 end,
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bool map);
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int (*set_opregion)(void *vgpu);
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int (*get_vfio_device)(void *vgpu);
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void (*put_vfio_device)(void *vgpu);
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};
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extern struct intel_gvt_mpt xengt_mpt;
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extern struct intel_gvt_mpt kvmgt_mpt;
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#endif /* _GVT_HYPERCALL_H_ */
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