mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
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
2.3 KiB
C
67 lines
2.3 KiB
C
/*
|
|
* Copyright(c) 2017 Intel Corporation. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Zhiyuan Lv <zhiyuan.lv@intel.com>
|
|
*
|
|
* Contributors:
|
|
* Xiaoguang Chen
|
|
* Tina Zhang <tina.zhang@intel.com>
|
|
*/
|
|
|
|
#ifndef _GVT_DMABUF_H_
|
|
#define _GVT_DMABUF_H_
|
|
#include <linux/vfio.h>
|
|
|
|
struct intel_vgpu_fb_info {
|
|
__u64 start;
|
|
__u64 start_gpa;
|
|
__u64 drm_format_mod;
|
|
__u32 drm_format; /* drm format of plane */
|
|
__u32 width; /* width of plane */
|
|
__u32 height; /* height of plane */
|
|
__u32 stride; /* stride of plane */
|
|
__u32 size; /* size of plane in bytes, align on page */
|
|
__u32 x_pos; /* horizontal position of cursor plane */
|
|
__u32 y_pos; /* vertical position of cursor plane */
|
|
__u32 x_hot; /* horizontal position of cursor hotspot */
|
|
__u32 y_hot; /* vertical position of cursor hotspot */
|
|
struct intel_vgpu_dmabuf_obj *obj;
|
|
};
|
|
|
|
/**
|
|
* struct intel_vgpu_dmabuf_obj- Intel vGPU device buffer object
|
|
*/
|
|
struct intel_vgpu_dmabuf_obj {
|
|
struct intel_vgpu *vgpu;
|
|
struct intel_vgpu_fb_info *info;
|
|
__u32 dmabuf_id;
|
|
struct kref kref;
|
|
bool initref;
|
|
struct list_head list;
|
|
};
|
|
|
|
int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args);
|
|
int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id);
|
|
void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu);
|
|
|
|
#endif
|