From: Gerd Hoffmann <kraxel@redhat.com>
To: Kirti Wankhede <kwankhede@nvidia.com>,
Alex Williamson <alex.williamson@redhat.com>
Cc: Xiaoguang Chen <xiaoguang.chen@intel.com>,
chris@chris-wilson.co.uk, intel-gfx@lists.freedesktop.org,
linux-kernel@vger.kernel.org, zhenyuw@linux.intel.com,
zhiyuan.lv@intel.com, intel-gvt-dev@lists.freedesktop.org,
zhi.a.wang@intel.com, kevin.tian@intel.com
Subject: Re: [PATCH v9 5/7] vfio: Define vfio based dma-buf operations
Date: Mon, 19 Jun 2017 08:38:32 +0200 [thread overview]
Message-ID: <1497854312.4207.4.camel@redhat.com> (raw)
In-Reply-To: <24c4880b-24f5-ea07-834c-c77d3e895c78@nvidia.com>
Hi,
> My suggestion was to use vfio device fd for this ioctl and have
> dmabuf
> mgr fd as member in above query_plane structure, for region type it
> would be set to 0.
Region type should be DRM_PLANE_TYPE_PRIMARY
> Can't mmap that page to get surface information. There is no way to
> synchronize between QEMU reading this mmapped region and vendor
> driver
> writing it. There could be race condition in these two operations.
> Read
> on this page should be trapped and blocking, so that surface in that
> region is only updated when its asked for.
Does it make sense to have a "generation" field in the plane_info
struct (which gets increased each time the struct changes) ?
cheers,
Gerd
next prev parent reply other threads:[~2017-06-19 6:38 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-15 8:00 [PATCH v9 0/7] drm/i915/gvt: Dma-buf support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 1/7] drm/i915/gvt: Extend the GVT-g architecture Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 2/7] drm/i915/gvt: OpRegion support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 3/7] drm: Extend the drm format Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 10:21 ` [Intel-gfx] " Ville Syrjälä
2017-06-15 10:21 ` Ville Syrjälä
2017-06-20 9:01 ` [Intel-gfx] " Zhang, Tina
2017-06-20 9:01 ` Zhang, Tina
2017-06-15 8:00 ` [PATCH v9 4/7] drm/i915/gvt: Frame buffer decoder support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 5/7] vfio: Define vfio based dma-buf operations Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 14:51 ` Kirti Wankhede
2017-06-15 14:51 ` Kirti Wankhede
2017-06-15 16:00 ` Gerd Hoffmann
2017-06-15 16:00 ` Gerd Hoffmann
2017-06-15 20:38 ` Alex Williamson
2017-06-15 20:38 ` Alex Williamson
2017-06-16 10:24 ` Gerd Hoffmann
2017-06-16 12:52 ` Alex Williamson
2017-06-16 13:32 ` Kirti Wankhede
2017-06-16 13:32 ` Kirti Wankhede
2017-06-16 16:39 ` Alex Williamson
2017-06-16 16:39 ` Alex Williamson
2017-06-16 18:28 ` Kirti Wankhede
2017-06-16 18:28 ` Kirti Wankhede
2017-06-19 6:34 ` Gerd Hoffmann
2017-06-19 14:54 ` Alex Williamson
2017-06-19 14:54 ` Alex Williamson
2017-06-20 8:35 ` Gerd Hoffmann
2017-06-20 8:35 ` Gerd Hoffmann
2017-06-20 13:55 ` Kirti Wankhede
2017-06-20 13:55 ` Kirti Wankhede
2017-06-21 7:22 ` Gerd Hoffmann
2017-07-12 13:18 ` Kirti Wankhede
2017-07-12 13:18 ` Kirti Wankhede
2017-07-14 9:58 ` Gerd Hoffmann
2017-07-14 9:58 ` Gerd Hoffmann
2017-06-19 6:38 ` Gerd Hoffmann [this message]
2017-06-19 14:55 ` Alex Williamson
2017-06-19 14:55 ` Alex Williamson
2017-06-20 8:41 ` [Intel-gfx] " Zhang, Tina
2017-06-20 8:41 ` Zhang, Tina
2017-06-20 10:57 ` [Intel-gfx] " Gerd Hoffmann
2017-06-20 10:57 ` Gerd Hoffmann
2017-06-20 15:00 ` [Intel-gfx] " Alex Williamson
2017-06-20 15:00 ` Alex Williamson
2017-06-20 17:07 ` Kirti Wankhede
2017-06-20 17:07 ` Kirti Wankhede
2017-06-20 23:01 ` [Intel-gfx] " Zhang, Tina
2017-06-20 23:01 ` Zhang, Tina
2017-06-20 23:22 ` [Intel-gfx] " Alex Williamson
2017-06-20 23:22 ` Alex Williamson
2017-06-21 9:20 ` [Intel-gfx] " Zhang, Tina
2017-06-21 9:20 ` Zhang, Tina
2017-06-21 11:03 ` [Intel-gfx] " Gerd Hoffmann
2017-06-21 11:03 ` Gerd Hoffmann
2017-06-21 18:59 ` Alex Williamson
2017-06-21 18:59 ` Alex Williamson
2017-06-22 8:30 ` Gerd Hoffmann
2017-06-22 8:30 ` Gerd Hoffmann
2017-06-22 18:54 ` [Intel-gfx] " Alex Williamson
2017-06-22 18:54 ` Alex Williamson
2017-06-23 7:26 ` [Intel-gfx] " Gerd Hoffmann
2017-06-23 7:26 ` Gerd Hoffmann
2017-06-23 7:49 ` [Intel-gfx] " Zhi Wang
2017-06-23 7:49 ` Zhi Wang
2017-06-23 8:31 ` Gerd Hoffmann
2017-06-23 8:31 ` Gerd Hoffmann
2017-06-23 16:40 ` Alex Williamson
2017-06-23 16:40 ` Alex Williamson
2017-06-23 17:15 ` [Intel-gfx] " Alex Williamson
2017-06-23 17:15 ` Alex Williamson
2017-06-26 6:17 ` [Intel-gfx] " Gerd Hoffmann
2017-06-26 6:17 ` Gerd Hoffmann
2017-06-22 0:21 ` [Intel-gfx] " Zhang, Tina
2017-06-22 0:21 ` Zhang, Tina
2017-06-21 7:34 ` [Intel-gfx] " Gerd Hoffmann
2017-06-21 7:34 ` Gerd Hoffmann
2017-06-23 21:58 ` [Intel-gfx] " Zhang, Tina
2017-06-23 21:58 ` Zhang, Tina
2017-06-26 6:39 ` [Intel-gfx] " Gerd Hoffmann
2017-06-26 6:39 ` Gerd Hoffmann
2017-06-26 17:28 ` [Intel-gfx] " Alex Williamson
2017-06-26 17:28 ` Alex Williamson
2017-06-27 6:12 ` [Intel-gfx] " Gerd Hoffmann
2017-06-27 6:12 ` Gerd Hoffmann
2017-06-28 12:48 ` [Intel-gfx] " Zhang, Tina
2017-06-28 12:48 ` Zhang, Tina
2017-06-29 6:41 ` [Intel-gfx] " Gerd Hoffmann
2017-06-29 6:41 ` Gerd Hoffmann
2017-06-29 8:39 ` [Intel-gfx] " Daniel Vetter
2017-06-29 8:39 ` Daniel Vetter
2017-07-04 0:47 ` [Intel-gfx] " Zhang, Tina
2017-07-04 0:47 ` Zhang, Tina
2017-06-20 13:35 ` Kirti Wankhede
2017-06-20 13:35 ` Kirti Wankhede
2017-06-15 8:00 ` [PATCH v9 6/7] drm/i915/gvt: Dmabuf support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 7/7] drm/i915/gvt: Adding user interface for dma-buf Xiaoguang Chen
2017-06-15 8:00 ` Xiaoguang Chen
2017-06-15 8:03 ` ✗ Fi.CI.BAT: failure for drm/i915/gvt: dma-buf support for GVT-g (rev9) Patchwork
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