From: Juergen Gross <jgross@suse.com>
To: Oleksandr Andrushchenko <andr2000@gmail.com>,
xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, airlied@linux.ie,
daniel.vetter@intel.com, seanpaul@chromium.org,
gustavo@padovan.org, boris.ostrovsky@oracle.com,
konrad.wilk@oracle.com
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: Re: [PATCH 1/9] drm/xen-front: Introduce Xen para-virtualized frontend driver
Date: Wed, 21 Feb 2018 09:19:50 +0100 [thread overview]
Message-ID: <c0928eaa-10e7-f047-dfe5-18e7cba76e76@suse.com> (raw)
In-Reply-To: <1519200222-20623-2-git-send-email-andr2000@gmail.com>
On 21/02/18 09:03, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>
> Introduce skeleton of the para-virtualized Xen display
> frontend driver. This patch only adds required
> essential stubs.
>
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> ---
> drivers/gpu/drm/Kconfig | 2 +
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/xen/Kconfig | 17 ++++++++
> drivers/gpu/drm/xen/Makefile | 5 +++
> drivers/gpu/drm/xen/xen_drm_front.c | 83 +++++++++++++++++++++++++++++++++++++
> 5 files changed, 108 insertions(+)
> create mode 100644 drivers/gpu/drm/xen/Kconfig
> create mode 100644 drivers/gpu/drm/xen/Makefile
> create mode 100644 drivers/gpu/drm/xen/xen_drm_front.c
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index deeefa7a1773..757825ac60df 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -289,6 +289,8 @@ source "drivers/gpu/drm/pl111/Kconfig"
>
> source "drivers/gpu/drm/tve200/Kconfig"
>
> +source "drivers/gpu/drm/xen/Kconfig"
> +
> # Keep legacy drivers last
>
> menuconfig DRM_LEGACY
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 50093ff4479b..9d66657ea117 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -103,3 +103,4 @@ obj-$(CONFIG_DRM_MXSFB) += mxsfb/
> obj-$(CONFIG_DRM_TINYDRM) += tinydrm/
> obj-$(CONFIG_DRM_PL111) += pl111/
> obj-$(CONFIG_DRM_TVE200) += tve200/
> +obj-$(CONFIG_DRM_XEN) += xen/
> diff --git a/drivers/gpu/drm/xen/Kconfig b/drivers/gpu/drm/xen/Kconfig
> new file mode 100644
> index 000000000000..4cca160782ab
> --- /dev/null
> +++ b/drivers/gpu/drm/xen/Kconfig
> @@ -0,0 +1,17 @@
> +config DRM_XEN
> + bool "DRM Support for Xen guest OS"
> + depends on XEN
> + help
> + Choose this option if you want to enable DRM support
> + for Xen.
> +
> +config DRM_XEN_FRONTEND
> + tristate "Para-virtualized frontend driver for Xen guest OS"
> + depends on DRM_XEN
> + depends on DRM
> + select DRM_KMS_HELPER
> + select VIDEOMODE_HELPERS
> + select XEN_XENBUS_FRONTEND
> + help
> + Choose this option if you want to enable a para-virtualized
> + frontend DRM/KMS driver for Xen guest OSes.
> diff --git a/drivers/gpu/drm/xen/Makefile b/drivers/gpu/drm/xen/Makefile
> new file mode 100644
> index 000000000000..967074d348f6
> --- /dev/null
> +++ b/drivers/gpu/drm/xen/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +drm_xen_front-objs := xen_drm_front.o
> +
> +obj-$(CONFIG_DRM_XEN_FRONTEND) += drm_xen_front.o
> diff --git a/drivers/gpu/drm/xen/xen_drm_front.c b/drivers/gpu/drm/xen/xen_drm_front.c
> new file mode 100644
> index 000000000000..fd372fb464a1
> --- /dev/null
> +++ b/drivers/gpu/drm/xen/xen_drm_front.c
> @@ -0,0 +1,83 @@
> +/*
> + * Xen para-virtual DRM device
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
Use SPDX identifier instead (same applies for all other new
sources):
// SPDX-License-Identifier: GPL-2.0
> + *
> + * Copyright (C) 2016-2018 EPAM Systems Inc.
> + *
> + * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> + */
> +
> +#include <drm/drmP.h>
> +
> +#include <xen/platform_pci.h>
> +#include <xen/xen.h>
> +#include <xen/xenbus.h>
> +
> +#include <xen/interface/io/displif.h>
> +
> +static void backend_on_changed(struct xenbus_device *xb_dev,
> + enum xenbus_state backend_state)
> +{
> +}
> +
> +static int xen_drv_probe(struct xenbus_device *xb_dev,
> + const struct xenbus_device_id *id)
> +{
> + return 0;
> +}
> +
> +static int xen_drv_remove(struct xenbus_device *dev)
> +{
> + return 0;
> +}
> +
> +static const struct xenbus_device_id xen_drv_ids[] = {
> + { XENDISPL_DRIVER_NAME },
> + { "" }
> +};
> +
> +static struct xenbus_driver xen_driver = {
> + .ids = xen_drv_ids,
> + .probe = xen_drv_probe,
> + .remove = xen_drv_remove,
> + .otherend_changed = backend_on_changed,
> +};
> +
> +static int __init xen_drv_init(void)
> +{
> + if (!xen_domain())
> + return -ENODEV;
> +
> + if (xen_initial_domain()) {
> + DRM_ERROR(XENDISPL_DRIVER_NAME " cannot run in initial domain\n");
> + return -ENODEV;
> + }
Why not? Wouldn't that be possible in case of the backend living in a
driver domain?
Juergen
next prev parent reply other threads:[~2018-02-21 8:19 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-21 8:03 [PATCH 0/9] drm/xen-front: Add support for Xen PV display frontend Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 1/9] drm/xen-front: Introduce Xen para-virtualized frontend driver Oleksandr Andrushchenko
2018-02-21 8:19 ` Juergen Gross [this message]
2018-02-21 8:47 ` Oleksandr Andrushchenko
2018-02-21 9:09 ` Juergen Gross
2018-02-21 9:11 ` Oleksandr Andrushchenko
2018-02-21 9:17 ` [Xen-devel] " Roger Pau Monné
2018-02-21 9:42 ` Oleksandr Andrushchenko
2018-02-21 10:19 ` Roger Pau Monné
2018-02-21 10:25 ` Oleksandr Andrushchenko
2018-02-22 22:23 ` Boris Ostrovsky
2018-02-23 6:37 ` Oleksandr Andrushchenko
2018-02-23 14:39 ` Boris Ostrovsky
2018-02-23 14:51 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 2/9] drm/xen-front: Implement Xen bus state handling Oleksandr Andrushchenko
2018-02-21 8:23 ` Juergen Gross
2018-02-21 8:50 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 3/9] drm/xen-front: Read driver configuration from Xen store Oleksandr Andrushchenko
2018-02-22 23:20 ` Boris Ostrovsky
2018-02-23 6:46 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 4/9] drm/xen-front: Implement Xen event channel handling Oleksandr Andrushchenko
2018-02-22 23:50 ` Boris Ostrovsky
2018-02-23 7:00 ` Oleksandr Andrushchenko
2018-02-23 14:44 ` Boris Ostrovsky
2018-02-23 14:49 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 5/9] drm/xen-front: Implement handling of shared display buffers Oleksandr Andrushchenko
2018-02-23 0:25 ` Boris Ostrovsky
2018-02-23 7:53 ` Oleksandr Andrushchenko
2018-02-23 14:36 ` Boris Ostrovsky
2018-02-23 14:45 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 6/9] drm/xen-front: Introduce DRM/KMS virtual display driver Oleksandr Andrushchenko
2018-02-23 15:12 ` Boris Ostrovsky
2018-02-23 15:19 ` Oleksandr Andrushchenko
2018-03-05 9:13 ` Daniel Vetter
2018-03-05 9:19 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 7/9] drm/xen-front: Implement KMS/connector handling Oleksandr Andrushchenko
2018-03-05 9:23 ` Daniel Vetter
2018-03-05 12:59 ` Oleksandr Andrushchenko
2018-03-06 7:22 ` Daniel Vetter
2018-03-06 7:29 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 8/9] drm/xen-front: Implement GEM operations Oleksandr Andrushchenko
2018-02-23 15:26 ` Boris Ostrovsky
2018-02-23 15:35 ` Oleksandr Andrushchenko
2018-02-26 23:47 ` Boris Ostrovsky
2018-02-27 6:52 ` Oleksandr Andrushchenko
2018-02-28 19:46 ` Boris Ostrovsky
2018-02-28 19:52 ` Oleksandr Andrushchenko
2018-03-05 9:32 ` Daniel Vetter
2018-03-05 13:46 ` Oleksandr Andrushchenko
2018-03-06 7:26 ` Daniel Vetter
2018-03-06 7:43 ` Oleksandr Andrushchenko
2018-02-21 8:03 ` [PATCH 9/9] drm/xen-front: Implement communication with backend Oleksandr Andrushchenko
2018-03-05 9:25 ` Daniel Vetter
2018-03-05 9:30 ` Oleksandr Andrushchenko
2018-03-06 9:26 ` Daniel Vetter
2018-03-06 9:45 ` Oleksandr Andrushchenko
2018-02-26 8:21 ` [PATCH 0/9] drm/xen-front: Add support for Xen PV display frontend Oleksandr Andrushchenko
2018-02-27 12:40 ` Oleksandr Andrushchenko
2018-02-28 14:08 ` [Xen-devel] " Julien Grall
2018-03-01 1:42 ` Stefano Stabellini
2018-03-01 8:26 ` Gerd Hoffmann
2018-03-01 8:49 ` Oleksandr Andrushchenko
2018-03-01 1:14 ` Stefano Stabellini
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