From: "Chen, Xiaoguang" <xiaoguang.chen@intel.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"zhenyuw@linux.intel.com" <zhenyuw@linux.intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
"Lv, Zhiyuan" <zhiyuan.lv@intel.com>,
"intel-gvt-dev@lists.freedesktop.org"
<intel-gvt-dev@lists.freedesktop.org>,
"Wang, Zhi A" <zhi.a.wang@intel.com>
Subject: RE: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf
Date: Fri, 19 May 2017 09:14:58 +0000 [thread overview]
Message-ID: <DD379D741F77464281CE7ED1CD7C12DE7065DE73@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <1495184222.627.46.camel@redhat.com>
Hi Gerd,
>-----Original Message-----
>From: intel-gvt-dev [mailto:intel-gvt-dev-bounces@lists.freedesktop.org] On
>Behalf Of Gerd Hoffmann
>Sent: Friday, May 19, 2017 4:57 PM
>To: Chen, Xiaoguang <xiaoguang.chen@intel.com>
>Cc: Tian, Kevin <kevin.tian@intel.com>; linux-kernel@vger.kernel.org;
>zhenyuw@linux.intel.com; Alex Williamson <alex.williamson@redhat.com>; Lv,
>Zhiyuan <zhiyuan.lv@intel.com>; intel-gvt-dev@lists.freedesktop.org; Wang, Zhi
>A <zhi.a.wang@intel.com>
>Subject: Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf
>
> Hi,
>
>> >We could also do it the other way around: Instead of having the
>> >kernel returning
>>
>> >the plane description userspace could pass it in, and the kernel
>> >throws -EINVAL in
>>
>> >case it doesn't match due to things having changed meanwhile.
>>
>> Or just return a dmabuf based on the current plane ?
>
>If gvt is able to hand out dma-bufs for inactive planes, then yes, we can do this.
>Have one ioctl where we pass in the plane id, get back a plane description struct,
>and another where we pass in the plane description struct and get back a dma-
>buf fd.
Or more simply just pass the plane id, because even the plane description did not match the current one we will eventually create a dmabuf based on current plane.
>
>cheers,
> Gerd
>
>_______________________________________________
>intel-gvt-dev mailing list
>intel-gvt-dev@lists.freedesktop.org
>https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev
next prev parent reply other threads:[~2017-05-19 9:15 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-28 9:35 [RFC PATCH 0/6] drm/i915/gvt: dma-buf support for GVT-g Xiaoguang Chen
2017-04-28 9:35 ` [RFC PATCH 1/6] drm/i915/gvt: extend the GVT-g architecture to support vfio device region Xiaoguang Chen
2017-04-28 9:35 ` [RFC PATCH 2/6] drm/i915/gvt: OpRegion support for GVT-g Xiaoguang Chen
2017-04-28 9:35 ` [RFC PATCH 3/6] drm/i915/gvt: framebuffer decoder " Xiaoguang Chen
2017-04-28 9:35 ` [RFC PATCH 4/6] drm/i915: export i915 dmabuf_ops Xiaoguang Chen
2017-04-28 9:35 ` [RFC PATCH 5/6] drm/i915/gvt: dmabuf support for GVT-g Xiaoguang Chen
2017-04-28 10:08 ` [Intel-gfx] " Chris Wilson
2017-05-02 7:40 ` Chen, Xiaoguang
2017-05-04 3:12 ` Chen, Xiaoguang
2017-05-02 9:37 ` Gerd Hoffmann
2017-04-28 9:35 ` [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf Xiaoguang Chen
2017-05-02 9:50 ` Gerd Hoffmann
2017-05-03 1:39 ` Chen, Xiaoguang
2017-05-04 3:09 ` Chen, Xiaoguang
2017-05-04 16:08 ` Alex Williamson
2017-05-05 6:55 ` Gerd Hoffmann
2017-05-05 15:11 ` Alex Williamson
2017-05-11 8:45 ` Chen, Xiaoguang
2017-05-11 13:27 ` Gerd Hoffmann
2017-05-11 15:45 ` Alex Williamson
2017-05-12 2:12 ` Chen, Xiaoguang
2017-05-12 2:58 ` Alex Williamson
2017-05-12 3:52 ` Chen, Xiaoguang
2017-05-12 9:12 ` Gerd Hoffmann
2017-05-12 16:38 ` Alex Williamson
2017-05-15 3:36 ` Chen, Xiaoguang
2017-05-15 17:44 ` Alex Williamson
2017-05-16 10:16 ` Chen, Xiaoguang
2017-05-17 21:43 ` Alex Williamson
2017-05-18 1:51 ` Chen, Xiaoguang
2017-05-18 14:56 ` Alex Williamson
2017-05-19 6:23 ` Chen, Xiaoguang
2017-05-19 8:04 ` Gerd Hoffmann
2017-05-19 8:17 ` Chen, Xiaoguang
2017-05-19 8:57 ` Gerd Hoffmann
2017-05-19 9:14 ` Chen, Xiaoguang [this message]
2017-05-19 10:51 ` Gerd Hoffmann
2017-05-18 6:22 ` Gerd Hoffmann
2017-05-12 6:56 ` Chen, Xiaoguang
2017-05-12 17:04 ` Alex Williamson
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