On 06/15/2018 09:46 AM, Juergen Gross wrote:
On 15/06/18 08:32, Oleksandr Andrushchenko wrote:
Please note, that this will need a change (attached) while
applying to the mainline kernel because of API changes [1].
Unfortunately, current Xen tip kernel tree is v4.17-rc5 based,
so I cannot make
@@ -548,6 +632,17 @@ static int gntdev_open(struct inode *inode, struct
file *flip)
}
flip->private_data = priv;
+#ifdef CONFIG_XEN_GRANT_DMA_ALLOC
+ priv->dma_dev = gntdev_miscdev.this_device;
+
+ /*
+* The device is not spawn from a device tree, so
/linux.git/commit/?id=3d6ce86ee79465e1b1b6e287f8ea26b553fc768e
On 06/15/2018 09:27 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Allow mappings for DMA backed buffers if grant table module
supports such: this extends grant device to not only map buffers
made of balloon pages
On 06/15/2018 12:08 PM, Dan Carpenter wrote:
On Fri, Jun 15, 2018 at 08:39:17AM +0300, Oleksandr Andrushchenko wrote:
On 06/15/2018 06:22 AM, YoungJun Cho wrote:
Dear Dan,
Your mail flashes back to my memory 5 years ago.
Back then, I had cleaned up the exynos driver.
And the replacement
On 06/08/2018 10:21 PM, Boris Ostrovsky wrote:
On 06/08/2018 01:59 PM, Stefano Stabellini wrote:
@@ -325,6 +401,14 @@ static int map_grant_pages(struct
grant_map
*map)
map->unmap_ops[i].handle = map->map_ops[i].handle;
if (use_ptemod)
Hi,
On 05/25/2018 06:50 PM, Arnd Bergmann wrote:
In 32-bit kernel builds, we cannot cast between a pointer and a 64-bit
type:
In file included from drivers/gpu/drm/xen/xen_drm_front_cfg.c:18:
drivers/gpu/drm/xen/xen_drm_front.h: In function 'xen_drm_front_fb_to_cookie':
ping
On 05/22/2018 05:13 PM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
When unplugging a hotpluggable DRM device we first unregister it
with drm_dev_unregister and then set drm_device.unplugged flag which
is used to mark device critical sections with drm_dev_enter
On 05/29/2018 09:04 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Memory {increase|decrease}_reservation and VA mappings update/reset
code used in balloon driver can be made common, so other drivers can
also re-use the same
On 05/29/2018 09:24 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
+
+void xenmem_reservation_va_mapping_update(unsigned long count,
+ struct page **pages,
+ xen_pfn_t *frames
On 05/30/2018 06:54 PM, Boris Ostrovsky wrote:
On 05/30/2018 04:29 AM, Oleksandr Andrushchenko wrote:
On 05/29/2018 11:03 PM, Boris Ostrovsky wrote:
On 05/29/2018 02:22 PM, Oleksandr Andrushchenko wrote:
On 05/29/2018 09:04 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr
On 05/30/2018 06:20 PM, Boris Ostrovsky wrote:
On 05/30/2018 02:34 AM, Oleksandr Andrushchenko wrote:
On 05/29/2018 10:10 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
+/**
+ * gnttab_dma_free_pages - free DMAable pages
+ * @args: arguments to the function
On 05/31/2018 04:46 AM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
Oleksandr Andrushchenko (8):
xen/grant-table: Make set/clear page private code shared
xen/balloon: Move common memory reservation routines to a module
xen/grant-table: Allow
On 05/31/2018 12:34 AM, Dongwon Kim wrote:
On Fri, May 25, 2018 at 06:33:24PM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Make set/clear page private code shared and accessible to
other kernel modules which can re-use these instead of open-coding.
Signed-off
On 05/31/2018 02:10 AM, Dongwon Kim wrote:
On Fri, May 25, 2018 at 06:33:29PM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
1. Create a dma-buf from grant references provided by the foreign
domain. By default dma-buf is backed by system memory pages
On 05/30/2018 10:24 PM, Boris Ostrovsky wrote:
On 05/30/2018 01:46 PM, Oleksandr Andrushchenko wrote:
On 05/30/2018 06:54 PM, Boris Ostrovsky wrote:
BTW, I also think you can further simplify
xenmem_reservation_va_mapping_* routines by bailing out right away if
xen_feature
On 05/29/2018 10:49 AM, Daniel Vetter wrote:
On Tue, May 29, 2018 at 10:09:57AM +0300, Oleksandr Andrushchenko wrote:
On 05/29/2018 10:02 AM, Daniel Vetter wrote:
On Tue, May 22, 2018 at 05:13:04PM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
When unplugging
On 05/29/2018 10:02 AM, Daniel Vetter wrote:
On Tue, May 22, 2018 at 05:13:04PM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
When unplugging a hotpluggable DRM device we first unregister it
with drm_dev_unregister and then set drm_device.unplugged flag which
is used
On 05/30/2018 07:24 AM, Juergen Gross wrote:
On 25/05/18 17:33, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Make set/clear page private code shared and accessible to
other kernel modules which can re-use these instead of open-coding.
Signed-off-by: Oleksandr Andrushchenko
On 05/30/2018 07:32 AM, Juergen Gross wrote:
On 25/05/18 17:33, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Memory {increase|decrease}_reservation and VA mappings update/reset
code used in balloon driver can be made common, so other drivers can
also re-use the same
On 05/30/2018 01:34 AM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
+/*
+ * Create a dma-buf [1] from grant references @refs of count @count provided
+ * by the foreign domain @domid with flags @flags.
+ *
+ * By default dma-buf is backed by system memory
On 05/29/2018 10:10 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Extend grant table module API to allow allocating buffers that can
be used for DMA operations and mapping foreign grant references
on top of those.
The resulting
On 05/30/2018 12:52 AM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
struct unmap_notify {
@@ -96,10 +104,28 @@ struct grant_map {
struct gnttab_unmap_grant_ref *kunmap_ops;
struct page **pages;
unsigned long pages_vm_start
On 05/25/2018 06:33 PM, Oleksandr Andrushchenko wrote:
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 3431fe210624..eaf63a2c7ae6 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -152,6 +152,16 @@ config XEN_GNTDEV
help
Allows userspace processes
On 05/29/2018 11:03 PM, Boris Ostrovsky wrote:
On 05/29/2018 02:22 PM, Oleksandr Andrushchenko wrote:
On 05/29/2018 09:04 PM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
@@ -463,11 +457,6 @@ static enum bp_state
increase_reservation(unsigned long nr_pages
On 05/25/2018 06:33 PM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Allow creating grant device context for use by kernel modules which
require functionality, provided by gntdev. Export symbols for dma-buf
API provided by the module.
Signed-off-by: Oleksandr Andrushchenko
On 05/25/2018 05:08 PM, Gerd Hoffmann wrote:
A driver to let userspace turn memfd regions into dma-bufs.
Use case: Allows qemu create dmabufs for the vga framebuffer or
virtio-gpu ressources. Then they can be passed around to display
those guest things on the host. To spice client for
On 05/29/2018 01:50 PM, Gerd Hoffmann wrote:
Hi,
+config UDMABUF
+ bool "userspace dmabuf misc driver"
+ default n
+ depends on DMA_SHARED_BUFFER
Don't you want "select DMA_SHARED_BUFFER" here instead?
Why do you think so?
After thinking a bit more your code looks ok,
On 05/31/2018 11:25 PM, Boris Ostrovsky wrote:
On 05/31/2018 10:41 AM, Oleksandr Andrushchenko wrote:
On 05/31/2018 08:51 AM, Oleksandr Andrushchenko wrote:
On 05/31/2018 04:46 AM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
Oleksandr Andrushchenko (8
Boris, I dropped your r-b for this patch as I changed
EXPORT_SYMBOL to EXPORT_SYMBOL_GPL as Juergen requested
On 06/01/2018 02:41 PM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Make set/clear page private code shared and accessible to
other kernel modules which can re-use
From: Oleksandr Andrushchenko
1. Create a dma-buf from grant references provided by the foreign
domain. By default dma-buf is backed by system memory pages, but
by providing GNTDEV_DMA_FLAG_XXX flags it can also be created
as a DMA write-combine/coherent buffer, e.g. allocated
From: Oleksandr Andrushchenko
Allow creating grant device context for use by kernel modules which
require functionality, provided by gntdev. Export symbols for dma-buf
API provided by the module.
Signed-off-by: Oleksandr Andrushchenko
---
drivers/xen/gntdev-dmabuf.c | 6 +++
drivers/xen
From: Oleksandr Andrushchenko
1. Import a dma-buf with the file descriptor provided and export
granted references to the pages of that dma-buf into the array
of grant references.
2. Add API to close all references to an imported buffer, so it can be
released by the owner. This is only
From: Oleksandr Andrushchenko
Memory {increase|decrease}_reservation and VA mappings update/reset
code used in balloon driver can be made common, so other drivers can
also re-use the same functionality without open-coding.
Create a dedicated file for the shared code and export corresponding
From: Oleksandr Andrushchenko
Only gnttab_{alloc|free}_pages are exported as EXPORT_SYMBOL
while all the rest are exported as EXPORT_SYMBOL_GPL, thus
effectively making it not possible for non-GPL driver modules
to use grant table module. Export gnttab_{alloc|free}_pages as
EXPORT_SYMBOL_GPL so
From: Oleksandr Andrushchenko
This work is in response to my previous attempt to introduce Xen/DRM
zero-copy driver [1] to enable Linux dma-buf API [2] for Xen based
frontends/backends. There is also an existing hyper_dmabuf approach
available [3] which, if reworked to utilize the proposed
From: Oleksandr Andrushchenko
Allow mappings for DMA backed buffers if grant table module
supports such: this extends grant device to not only map buffers
made of balloon pages, but also from buffers allocated with
dma_alloc_xxx.
Signed-off-by: Oleksandr Andrushchenko
---
drivers/xen
From: Oleksandr Andrushchenko
Extend grant table module API to allow allocating buffers that can
be used for DMA operations and mapping foreign grant references
on top of those.
The resulting buffer is similar to the one allocated by the balloon
driver in terms that proper memory reservation
From: Oleksandr Andrushchenko
Add UAPI and IOCTLs for dma-buf grant device driver extension:
the extension allows userspace processes and kernel modules to
use Xen backed dma-buf implementation. With this extension grant
references to the pages of an imported dma-buf can be exported
for other
From: Oleksandr Andrushchenko
Make set/clear page private code shared and accessible to
other kernel modules which can re-use these instead of open-coding.
Signed-off-by: Oleksandr Andrushchenko
---
drivers/xen/grant-table.c | 54 +--
include/xen
On 06/04/2018 07:37 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
diff --git a/include/xen/mem-reservation.h b/include/xen/mem-reservation.h
new file mode 100644
index ..a727d65a1e61
--- /dev/null
+++ b/include/xen/mem-reservation.h
@@ -0,0 +1,65
On 06/04/2018 09:46 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Extend grant table module API to allow allocating buffers that can
be used for DMA operations and mapping foreign grant references
on top of those.
The resulting
On 06/04/2018 11:12 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Allow mappings for DMA backed buffers if grant table module
supports such: this extends grant device to not only map buffers
made of balloon pages, but also
On 06/04/2018 11:49 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Add UAPI and IOCTLs for dma-buf grant device driver extension:
the extension allows userspace processes and kernel modules to
use Xen backed dma-buf
On 06/07/2018 12:19 AM, Boris Ostrovsky wrote:
On 06/06/2018 04:14 AM, Oleksandr Andrushchenko wrote:
On 06/04/2018 11:12 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
@@ -121,8 +146,27 @@ static void gntdev_free_map(struct grant_map *map)
if (map
On 06/07/2018 12:32 AM, Boris Ostrovsky wrote:
On 06/06/2018 05:06 AM, Oleksandr Andrushchenko wrote:
On 06/04/2018 11:49 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
+struct gntdev_dmabuf_export_args {
+ int dummy;
+};
Please define the full structure
On 06/07/2018 01:05 AM, Dongwon Kim wrote:
On Wed, Jun 06, 2018 at 05:51:38PM -0400, Boris Ostrovsky wrote:
On 06/06/2018 08:46 AM, Oleksandr Andrushchenko wrote:
On 06/05/2018 01:36 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr
On 06/07/2018 12:48 AM, Boris Ostrovsky wrote:
On 06/06/2018 08:10 AM, Oleksandr Andrushchenko wrote:
On 06/05/2018 01:07 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
+
+static struct sg_table *
+dmabuf_exp_ops_map_dma_buf(struct dma_buf_attachment
On 06/07/2018 12:09 AM, Boris Ostrovsky wrote:
On 06/06/2018 03:24 AM, Oleksandr Andrushchenko wrote:
On 06/04/2018 07:37 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
diff --git a/include/xen/mem-reservation.h
b/include/xen/mem-reservation.h
new file mode
09,8 @@ void *dma_buf_kmap(struct dma_buf *dmabuf, unsigned long
page_num)
{
WARN_ON(!dmabuf);
+ if (!dmabuf->ops->map)
+ return NULL;
return dmabuf->ops->map(dmabuf, page_num);
}
EXPORT_SYMBOL_GPL(dma_buf_kmap);
Reviewed-by:
On 05/31/2018 10:51 AM, Oleksandr Andrushchenko wrote:
On 05/30/2018 10:24 PM, Boris Ostrovsky wrote:
On 05/30/2018 01:46 PM, Oleksandr Andrushchenko wrote:
On 05/30/2018 06:54 PM, Boris Ostrovsky wrote:
BTW, I also think you can further simplify
xenmem_reservation_va_mapping_* routines
On 05/31/2018 08:55 AM, Oleksandr Andrushchenko wrote:
On 05/31/2018 02:10 AM, Dongwon Kim wrote:
On Fri, May 25, 2018 at 06:33:29PM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
1. Create a dma-buf from grant references provided by the foreign
domain. By default
On 05/31/2018 08:51 AM, Oleksandr Andrushchenko wrote:
On 05/31/2018 04:46 AM, Boris Ostrovsky wrote:
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
Oleksandr Andrushchenko (8):
xen/grant-table: Make set/clear page private code shared
xen/balloon: Move common memory
On 06/04/2018 07:37 PM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
diff --git a/include/xen/mem-reservation.h b/include/xen/mem-reservation.h
new file mode 100644
index ..a727d65a1e61
--- /dev/null
+++ b/include/xen/mem-reservation.h
@@ -0,0 +1,65
or objections are there so this
seems reasonable to me now.
Thank you,
Oleksandr
On 06/15/2018 09:27 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
This work is in response to my previous attempt to introduce Xen/DRM
zero-copy driver [1] to enable Linux dma-buf API [2] for Xen
+
+static const struct dma_buf_ops dmabuf_exp_ops = {
+ .attach = dmabuf_exp_ops_attach,
+ .detach = dmabuf_exp_ops_detach,
+ .map_dma_buf = dmabuf_exp_ops_map_dma_buf,
+ .unmap_dma_buf = dmabuf_exp_ops_unmap_dma_buf,
+ .release = dmabuf_exp_ops_release,
+
On 07/02/2018 11:20 AM, Juergen Gross wrote:
On 02/07/18 09:10, Oleksandr Andrushchenko wrote:
Hello, Boris, Juergen!
Do you think I can re-base the series (which already has
all required R-b's from Xen community) onto the latest kernel
with API changes to patches 5 (of_dma_configure) and 8
n on broken connection, for example.
4. As per my understanding I cannot put XENDISPL_OP_PG_FLIP request
into .atomic_check as the check doesn't guarantee that .atomic_flush
will follow. Is this correct or there is a more neat solution exists?
Thank you very much for you time,
Oleksandr Andrushchenko
[
Hi, all!
I am working on a para-virtualized frontend DRM driver for Xen [1]
which implements display device I/O interface for Xen guest OSes [2].
At the moment I am rebasing the existing implementation from 4.9 kernel
to recent and found that when user-space DRM application exits then CRTC's
On 02/01/2018 12:04 PM, Maarten Lankhorst wrote:
Op 01-02-18 om 08:08 schreef Oleksandr Andrushchenko:
Hi, all!
I am working on a para-virtualized frontend DRM driver for Xen [1]
which implements display device I/O interface for Xen guest OSes [2].
At the moment I am rebasing the existing
Hi, Maarten!
On 02/06/2018 05:37 PM, Maarten Lankhorst wrote:
Op 06-02-18 om 15:43 schreef Oleksandr Andrushchenko:
Hello, Maarten!
On 02/01/2018 12:13 PM, Oleksandr Andrushchenko wrote:
On 02/01/2018 12:04 PM, Maarten Lankhorst wrote:
Op 01-02-18 om 08:08 schreef Oleksandr Andrushchenko
Hello, Ville!
On 02/06/2018 06:04 PM, Ville Syrjälä wrote:
On Tue, Feb 06, 2018 at 11:59:37AM +0200, Oleksandr Andrushchenko wrote:
Hello, Ville!
Thank you very much for such a comprehensive answer.
Please see inline
On 02/05/2018 06:47 PM, Ville Syrjälä wrote:
On Mon, Feb 05, 2018 at 06
Hello, Ville!
Thank you very much for such a comprehensive answer.
Please see inline
On 02/05/2018 06:47 PM, Ville Syrjälä wrote:
On Mon, Feb 05, 2018 at 06:03:25PM +0200, Oleksandr Andrushchenko wrote:
Hello,
I have a DRM driver which implements display protocol for Xen [1
Hello, Maarten!
On 02/01/2018 12:13 PM, Oleksandr Andrushchenko wrote:
On 02/01/2018 12:04 PM, Maarten Lankhorst wrote:
Op 01-02-18 om 08:08 schreef Oleksandr Andrushchenko:
Hi, all!
I am working on a para-virtualized frontend DRM driver for Xen [1]
which implements display device I/O
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Do not use deprecated drm_driver.{enable|disable)_vblank callbacks,
but use drm_simple_kms_helpe's pipe callbacks instead.
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Cc: Marek Vasut &l
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Do not use deprecated drm_driver.{enable|disable)_vblank callbacks,
but use drm_simple_kms_helpe's pipe callbacks instead.
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Cc: Linus Walleij
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
If simple_kms_helper based driver needs to work with vblanks,
then it has to provide drm_driver.{enable|disable}_vblank callbacks,
because drm_simple_kms_helper.drm_crtc_funcs does not provide any.
At the same time drm_
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
If simple_kms_helper based driver needs to work with vblanks,
then it has to provide drm_driver.{enable|disable}_vblank callbacks,
because drm_simple_kms_helper.drm_crtc_funcs does not provide any.
At the same time drm_
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Do not use deprecated drm_driver.{enable|disable)_vblank callbacks,
but use drm_simple_kms_helpe's pipe callbacks instead.
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Cc: Eric Anholt <
On 02/09/2018 06:24 PM, Ville Syrjälä wrote:
On Fri, Feb 09, 2018 at 06:09:09PM +0200, Oleksandr Andrushchenko wrote:
On 02/09/2018 05:53 PM, Ville Syrjälä wrote:
On Thu, Feb 08, 2018 at 11:53:30AM +0200, Oleksandr Andrushchenko wrote:
Hello, Ville!
On 02/06/2018 06:04 PM, Ville Syrjälä
On 02/09/2018 05:53 PM, Ville Syrjälä wrote:
On Thu, Feb 08, 2018 at 11:53:30AM +0200, Oleksandr Andrushchenko wrote:
Hello, Ville!
On 02/06/2018 06:04 PM, Ville Syrjälä wrote:
On Tue, Feb 06, 2018 at 11:59:37AM +0200, Oleksandr Andrushchenko wrote:
Hello, Ville!
Thank you very much
On 02/13/2018 03:51 PM, Linus Walleij wrote:
On Mon, Feb 12, 2018 at 9:52 AM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Do not use deprecated drm_driver.{enable|disable)_vblank callbacks,
but use drm_simple
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
It is possible that drm_simple_kms_plane_atomic_check called
with no CRTC set, e.g. when user-space application sets CRTC_ID/FB_ID
to 0 before doing any actual drawing. This leads to NULL pointer
dereference because in this ca
On 02/09/2018 07:09 PM, Ville Syrjälä wrote:
On Fri, Feb 09, 2018 at 06:30:08PM +0200, Oleksandr Andrushchenko wrote:
-- OFFTOP --
BTW, what is the right branch should I use
for a new DRM driver and the patch like the above?
I am lost a bit :)
Usual recommendation is to use:
git
On 02/19/2018 04:30 PM, Daniel Vetter wrote:
On Tue, Feb 13, 2018 at 10:44:16AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
It is possible that drm_simple_kms_plane_atomic_check called
with no CRTC set, e.g. when user-space appli
On 02/21/2018 11:17 AM, Roger Pau Monné wrote:
On Wed, Feb 21, 2018 at 10:03:34AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Introduce skeleton of the para-virtualized Xen display
frontend driver. This patch only adds re
On 02/21/2018 10:19 AM, Juergen Gross wrote:
On 21/02/18 09:03, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Introduce skeleton of the para-virtualized Xen display
frontend driver. This patch only adds required
essential stubs.
Sign
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Handle communication with the backend:
- send requests and wait for the responses according
to the displif protocol
- serialize access to the communication channel
- time-out used for backend communication is set to 3
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Implement shared buffer handling according to the
para-virtualized display device protocol at xen/interface/io/displif.h:
- handle page directories according to displif protocol:
- allocate and share page direc
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Hello!
This patch series adds support for Xen [1] para-virtualized
frontend display driver. It implements the protocol from
include/xen/interface/io/displif.h [2].
Accompanying backend [3] is implemented as a user-space appli
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Implement essential initialization of the display driver:
- introduce required data structures
- handle DRM/KMS driver registration
- perform basic DRM driver initialization
- register driver on backend connection
-
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Initial handling for Xen bus states: implement
Xen bus state machine for the frontend driver according to
the state diagram and recovery flow from display para-virtualized
protocol: xen/interface/io/displif.h.
Sign
From: Oleksandr Andrushchenko <oleksandr_andrushche...@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_andrushche...@epam.com>
---
drivers/gpu
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Implement GEM handling depending on driver mode of operation:
depending on the requirements for the para-virtualized environment, namely
requirements dictated by the accompanying DRM/(v)GPU drivers running in both
host and
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Handle Xen event channels:
- create for all configured connectors and publish
corresponding ring references and event channels in Xen store,
so backend can connect
- implement event channels interrupt handlers
-
On 02/21/2018 11:09 AM, Juergen Gross wrote:
On 21/02/18 09:47, Oleksandr Andrushchenko wrote:
On 02/21/2018 10:19 AM, Juergen Gross wrote:
On 21/02/18 09:03, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Introduce skeleton of th
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Read configuration values from Xen store according
to xen/interface/io/displif.h protocol:
- read connector(s) configuration
- read buffer allocation mode (backend/frontend)
Signed-off-by: Oleksandr Andrush
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Implement kernel modesetiing/connector handling using
DRM simple KMS helper pipeline:
- implement KMS part of the driver with the help of DRM
simple pipepline helper which is possible due to the fact
that the para-virtu
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
It is possible that drm_simple_kms_plane_atomic_check called
with no CRTC set, e.g. when user-space application sets CRTC_ID/FB_ID
to 0 before doing any actual drawing. This leads to NULL pointer
dereference because in this ca
On 02/21/2018 10:23 AM, Juergen Gross wrote:
On 21/02/18 09:03, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Initial handling for Xen bus states: implement
Xen bus state machine for the frontend driver according to
the state d
On 02/22/2018 08:09 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
It is possible that drm_simple_kms_plane_atomic_check called
with no CRTC set, e.g. when user-space application sets CRTC_ID/FB_ID
to 0 before doing any actual d
ping
On 02/12/2018 10:52 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
If simple_kms_helper based driver needs to work with vblanks,
then it has to provide drm_driver.{enable|disable}_vblank callbacks,
b
On 02/19/2018 11:36 AM, Daniel Vetter wrote:
On Tue, Feb 06, 2018 at 11:59:37AM +0200, Oleksandr Andrushchenko wrote:
Hello, Ville!
Thank you very much for such a comprehensive answer.
Just noticed a few of your questions threads. We'd very much appreciate
(for the next person creating
On 02/20/2018 02:49 PM, Daniel Vetter wrote:
On Tue, Feb 20, 2018 at 02:36:05PM +0200, Oleksandr Andrushchenko wrote:
On 02/20/2018 01:17 PM, Daniel Vetter wrote:
On Mon, Feb 19, 2018 at 04:58:43PM +0200, Oleksandr Andrushchenko wrote:
On 02/19/2018 04:30 PM, Daniel Vetter wrote:
On Tue, Feb
On 02/20/2018 02:53 PM, Oleksandr Andrushchenko wrote:
On 02/20/2018 02:49 PM, Daniel Vetter wrote:
On Tue, Feb 20, 2018 at 02:36:05PM +0200, Oleksandr Andrushchenko wrote:
On 02/20/2018 01:17 PM, Daniel Vetter wrote:
On Mon, Feb 19, 2018 at 04:58:43PM +0200, Oleksandr Andrushchenko
wrote
On 02/20/2018 01:17 PM, Daniel Vetter wrote:
On Mon, Feb 19, 2018 at 04:58:43PM +0200, Oleksandr Andrushchenko wrote:
On 02/19/2018 04:30 PM, Daniel Vetter wrote:
On Tue, Feb 13, 2018 at 10:44:16AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrush
On 02/22/2018 06:59 PM, Daniel Vetter wrote:
On Mon, Feb 19, 2018 at 11:11:23AM +0200, Oleksandr Andrushchenko wrote:
ping
On 02/12/2018 10:52 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
If simple_kms_helper based driver needs t
On 02/22/2018 06:11 PM, Daniel Vetter wrote:
On Thu, Feb 22, 2018 at 08:12:48AM +0200, Oleksandr Andrushchenko wrote:
On 02/22/2018 08:09 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
It is possible that drm_simple_kms_plane_atomic
On 02/23/2018 01:50 AM, Boris Ostrovsky wrote:
On 02/21/2018 03:03 AM, Oleksandr Andrushchenko wrote:
+
+static irqreturn_t evtchnl_interrupt_ctrl(int irq, void *dev_id)
+{
+ struct xen_drm_front_evtchnl *evtchnl = dev_id;
+ struct xen_drm_front_info *front_info = evtchnl
On 02/23/2018 02:25 AM, Boris Ostrovsky wrote:
On 02/21/2018 03:03 AM, Oleksandr Andrushchenko wrote:
static int __init xen_drv_init(void)
{
+ /* At the moment we only support case with XEN_PAGE_SIZE == PAGE_SIZE */
+ BUILD_BUG_ON(XEN_PAGE_SIZE != PAGE_SIZE);
Why
On 02/23/2018 12:23 AM, Boris Ostrovsky wrote:
On 02/21/2018 03:03 AM, Oleksandr Andrushchenko wrote:
+static struct xenbus_driver xen_driver = {
+ .ids = xen_drv_ids,
+ .probe = xen_drv_probe,
+ .remove = xen_drv_remove,
+ .otherend_changed = backend_on_changed,
What
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