From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
From the description of the "DMA-BUF/GEM Object references
and lifetime overview" it is not clear when exactly
dma_buf gets destroyed and memory freed: only driver
.release function mentioned which makes confu
On 01/26/2017 12:45 PM, Chris Wilson wrote:
On Thu, Jan 26, 2017 at 11:36:05AM +0100, Daniel Vetter wrote:
On Thu, Jan 26, 2017 at 09:22:46AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
From the description of the "
Thank you for comments,
I will update the patch and send v1.
On 01/26/2017 12:36 PM, Daniel Vetter wrote:
On Thu, Jan 26, 2017 at 09:22:46AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
From the description of the "DMA-BUF
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
From the description of the "DMA-BUF/GEM Object references
and lifetime overview" it is not clear when exactly
dma_buf gets destroyed and memory freed: only driver
.release function mentioned which makes confu
On 01/27/2017 04:00 PM, Daniel Vetter wrote:
On Fri, Jan 27, 2017 at 09:04:25AM +0200, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
From the description of the "DMA-BUF/GEM Object references
and lifetime overview" it is not cl
On 03/18/2017 04:06 PM, Rob Clark wrote:
On Sat, Mar 18, 2017 at 9:25 AM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
Hi, Rob
On 03/18/2017 02:22 PM, Rob Clark wrote:
On Fri, Mar 17, 2017 at 1:39 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
Hello,
I am wr
Hi, Rob
On 03/18/2017 02:22 PM, Rob Clark wrote:
On Fri, Mar 17, 2017 at 1:39 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
Hello,
I am writing a para-virtualized DRM driver for Xen hypervisor
and it now works with DRM CMA helpers, but I would also like
to make it work wi
On 03/18/2017 04:50 PM, Rob Clark wrote:
On Sat, Mar 18, 2017 at 10:44 AM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
then TTM might be useful.
I was looking into it, but it seems to be an overkill in my case
And isn't it that GEM should be used for new drivers, n
Hello,
I am writing a para-virtualized DRM driver for Xen hypervisor
and it now works with DRM CMA helpers, but I would also like
to make it work with non-contigous memory: virtual machine
that the driver runs in can't guarantee that CMA is actually
physically contigous (that is not a problem
On 03/20/2017 08:52 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 2:25 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/20/2017 08:17 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 2:01 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/20/2017 07:38 PM, Rob
On 03/20/2017 07:38 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 1:18 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/18/2017 02:22 PM, Rob Clark wrote:
On Fri, Mar 17, 2017 at 1:39 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
Hello,
I am writing a para
On 03/20/2017 08:17 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 2:01 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/20/2017 07:38 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 1:18 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/18/2017 02:22 PM, Rob
On 03/18/2017 02:22 PM, Rob Clark wrote:
On Fri, Mar 17, 2017 at 1:39 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
Hello,
I am writing a para-virtualized DRM driver for Xen hypervisor
and it now works with DRM CMA helpers, but I would also like
to make it work with non-con
On 03/20/2017 08:52 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 2:25 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/20/2017 08:17 PM, Rob Clark wrote:
On Mon, Mar 20, 2017 at 2:01 PM, Oleksandr Andrushchenko
<andr2...@gmail.com> wrote:
On 03/20/2017 07:38 PM, Rob
On 12/20/2017 01:27 AM, Dongwon Kim wrote:
This patch series contains the implementation of a new device driver,
hyper_dmabuf, which provides a method for DMA-BUF sharing across
different OSes running on the same virtual OS platform powered by
a hypervisor.
This is very interesting at least in
"
Signed-off-by: Stephen Rothwell <s...@canb.auug.org.au>
Thank you,
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
---
drivers/gpu/drm/xen/xen_drm_front.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/xen/xen_drm_front.c
b/
On 05/08/2018 12:26 PM, Dan Carpenter wrote:
drm_dev_alloc() returns error pointers, it never returns NULL.
Fixes: c575b7eeb89f ("drm/xen-front: Add support for Xen PV display frontend")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Thank you,
Reviewed-by: Oleksan
pport for Xen PV display frontend")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Thank you,
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
diff --git a/drivers/gpu/drm/xen/xen_drm_front_shbuf.c
b/drivers/gpu/drm/xen/xen_drm_front_shbuf.c
index d570
n...@oracle.com>
Thank you,
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
diff --git a/drivers/gpu/drm/xen/xen_drm_front.c
b/drivers/gpu/drm/xen/xen_drm_front.c
index 378cb7ce0db5..3345ac71b391 100644
--- a/drivers/gpu/drm/xen/xen_drm_front.c
+++ b/drivers/gpu/d
On 04/25/2018 08:16 PM, Dongwon Kim wrote:
On Wed, Apr 25, 2018 at 08:34:55AM +0200, Daniel Vetter wrote:
On Wed, Apr 25, 2018 at 09:07:07AM +0300, Oleksandr Andrushchenko wrote:
On 04/24/2018 11:35 PM, Dongwon Kim wrote:
Had a meeting with Daniel and talked about bringing out generic
part
On 05/08/2018 12:37 PM, Oleksandr Andrushchenko wrote:
On 05/08/2018 12:28 PM, Dan Carpenter wrote:
If the loop times out then we want to exit with "to" set to zero, but in
the current code it's set to -1.
Fixes: c575b7eeb89f ("drm/xen-front: Add support for Xen PV display
fro
On 05/08/2018 12:37 PM, Oleksandr Andrushchenko wrote:
On 05/08/2018 12:27 PM, Dan Carpenter wrote:
The xen_drm_front_shbuf_alloc() function was returning a mix of error
pointers and NULL and the the caller wasn't checking correctly. I've
changed it to always return error pointer consistently
On 05/08/2018 12:34 PM, Oleksandr Andrushchenko wrote:
On 05/08/2018 12:26 PM, Dan Carpenter wrote:
drm_dev_alloc() returns error pointers, it never returns NULL.
Fixes: c575b7eeb89f ("drm/xen-front: Add support for Xen PV display
frontend")
Signed-off-by: Dan Carpenter &
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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]
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
---
drivers/xen/gntdev.c | 954 +-
include/uapi/xen/gntdev.h | 101
include/xen/gntdev_exp.h | 2
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
---
drivers/xen/balloon.c | 214 +++---
drivers/xen/xen-balloon.c | 2 +
include/xen/balloon.h | 11
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
---
drivers/xen/grant-table.c | 49 +++
include/xen/grant_table.h | 7 ++
2 files changed, 56 inserti
On 05/15/2018 11:54 AM, Colin King wrote:
From: Colin Ian King <colin.k...@canonical.com>
Trivial fix to spelling mistake in DRM_INFO message.
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
Thank you,
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrush
On 05/21/2018 07:35 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:40 AM, Oleksandr Andrushchenko wrote:
On 05/19/2018 01:04 AM, Boris Ostrovsky wrote:
On 05/17/2018 04:26 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
A commit message
On 05/22/2018 05:33 PM, Boris Ostrovsky wrote:
On 05/22/2018 01:55 AM, Oleksandr Andrushchenko wrote:
On 05/21/2018 11:36 PM, Boris Ostrovsky wrote:
On 05/21/2018 03:13 PM, Oleksandr Andrushchenko wrote:
On 05/21/2018 09:53 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:32 PM, Oleksandr
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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()/
drm_dev_exit() preventing
On 05/23/2018 12:19 PM, Juergen Gross wrote:
On 21/05/18 09:39, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Building for a 32-bit target results in warnings from casting
between a 32-bit pointer and a 64-bit integer. Fix the wa
On 05/23/2018 02:06 PM, Juergen Gross wrote:
On 23/05/18 12:00, Oleksandr Andrushchenko wrote:
On 05/23/2018 12:19 PM, Juergen Gross wrote:
On 21/05/18 09:39, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Building for a 32-bit target r
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Building for a 32-bit target results in warnings from casting
between a 32-bit pointer and a 64-bit integer. Fix the warnings
by casting those pointers to uintptr_t first.
Signed-off-by: Oleksandr Andrush
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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 <oleksandr_a
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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]
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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-c
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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 <oleksandr_andrushche...@epam.com>
---
drivers/xen/g
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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 im
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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: Ole
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
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
On 05/23/2018 02:46 PM, Juergen Gross wrote:
On 23/05/18 13:36, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Building for a 32-bit target results in warnings from casting
between a 32-bit pointer and a 64-bit integer. Fix the wa
On 05/22/2018 09:02 PM, Boris Ostrovsky wrote:
On 05/22/2018 11:00 AM, Oleksandr Andrushchenko wrote:
On 05/22/2018 05:33 PM, Boris Ostrovsky wrote:
On 05/22/2018 01:55 AM, Oleksandr Andrushchenko wrote:
On 05/21/2018 11:36 PM, Boris Ostrovsky wrote:
On 05/21/2018 03:13 PM, Oleksandr
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Building for a 32-bit target results in warnings from casting
between a 32-bit pointer and a 64-bit integer. Fix the warnings
by casting those pointers to uintptr_t first.
Signed-off-by: Oleksandr Andrush
you change it to something
else like... "xen_"?
Np, will rename
On Thu, May 17, 2018 at 11:26:04AM +0300, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.co
On 05/21/2018 09:53 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:32 PM, Oleksandr Andrushchenko wrote:
On 05/21/2018 07:35 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:40 AM, Oleksandr Andrushchenko wrote:
On 05/19/2018 01:04 AM, Boris Ostrovsky wrote:
On 05/17/2018 04:26 AM, Oleksandr
On 05/21/2018 11:36 PM, Boris Ostrovsky wrote:
On 05/21/2018 03:13 PM, Oleksandr Andrushchenko wrote:
On 05/21/2018 09:53 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:32 PM, Oleksandr Andrushchenko wrote:
On 05/21/2018 07:35 PM, Boris Ostrovsky wrote:
On 05/21/2018 01:40 AM, Oleksandr
On 05/19/2018 01:04 AM, Boris Ostrovsky wrote:
On 05/17/2018 04:26 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
A commit message would be useful.
Sure, v1 will have it
Signed-off-by: Oleksandr Andrushchenko <oleksandr_a
On 05/19/2018 01:19 AM, Boris Ostrovsky wrote:
On 05/17/2018 04:26 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
---
drivers/xen/grant-
On 06/05/2018 01:07 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, 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, but
by providing
On 06/05/2018 01:28 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote:
/* -- */
+static int
+dmabuf_imp_grant_foreign_access(struct page **pages, u32 *refs,
+ int
On 06/05/2018 01:36 AM, Boris Ostrovsky wrote:
On 06/01/2018 07:41 AM, 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
On 06/11/2018 07:51 PM, Stefano Stabellini wrote:
On Mon, 11 Jun 2018, Oleksandr Andrushchenko wrote:
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
On 06/11/2018 08:46 PM, Julien Grall wrote:
Hi,
On 06/11/2018 06:16 PM, Oleksandr Andrushchenko wrote:
On 06/11/2018 07:51 PM, Stefano Stabellini wrote:
On Mon, 11 Jun 2018, Oleksandr Andrushchenko wrote:
On 06/08/2018 10:21 PM, Boris Ostrovsky wrote:
On 06/08/2018 01:59 PM, Stefano
On 06/08/2018 01:30 AM, Boris Ostrovsky wrote:
On 06/07/2018 04:44 AM, Oleksandr Andrushchenko wrote:
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
On 06/08/2018 12:46 AM, Boris Ostrovsky wrote:
(Stefano, question for you at the end)
On 06/07/2018 02:39 AM, Oleksandr Andrushchenko wrote:
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 06/08/2018 01:26 AM, Boris Ostrovsky wrote:
On 06/07/2018 03:17 AM, Oleksandr Andrushchenko wrote:
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:
diff --git a/drivers/xen/gntdev.c b
On 06/18/2018 03:29 PM, Dan Carpenter wrote:
On Mon, Jun 18, 2018 at 09:07:09AM +0300, Oleksandr Andrushchenko wrote:
drivers/gpu/drm/drm_gem_cma_helper.c| 2 +-
drivers/gpu/drm/xen/xen_drm_front_gem.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu
On 06/18/2018 01:06 PM, Andre Przywara wrote:
Hi,
On 25/05/18 06:32, Oleksandr Andrushchenko wrote:
On 05/23/2018 02:46 PM, Juergen Gross wrote:
On 23/05/18 13:36, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Building for a 32-bit target results in warnings from casting
On 06/13/2018 04:07 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
One more thing: please add a comment here saying that frames array is
array of PFNs (in Xen granularity), which is what
XENMEM_populate_physmap requires. And remove (or update to name
On 06/13/2018 03:47 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
diff --git a/include/xen/mem-reservation.h
b/include/xen/mem-reservation.h
new file mode 100644
index ..e0939387278d
--- /dev/null
+++ b/include
On 06/13/2018 04:12 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 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
On 06/13/2018 04:26 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
static void gntdev_print_maps(struct gntdev_priv *priv,
@@ -121,8 +146,27 @@ static void gntdev_free_map(struct grant_map *map)
if (map == NULL)
return;
+#ifdef
On 06/13/2018 04:38 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
This is in preparation for adding support of DMA buffer
functionality: make map/unmap related code and structures, used
privately by gntdev, ready for dma-buf
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
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
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
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
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
Reviewed-by: Boris Ostrovsky
---
drivers/xen/grant-table.c | 54
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
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
This is in preparation for adding support of DMA buffer
functionality: make map/unmap related code and structures, used
privately by gntdev, ready for dma-buf extension, which will re-use
these. Rename corresponding structures as those become non-private
to gntdev
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
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
Dan Carpenter has reported that there is the following static checker
warning:
drivers/gpu/drm/drm_prime.c:317 drm_gem_map_dma_buf()
warn: 'sgt' can also be NULL
314 sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
315
316 if
Boris, Juergen!
Thank you so much for your comments and time spent on this
series. Appreciate that very much!
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
On 06/16/2018 12:07 AM, Boris Ostrovsky wrote:
On 06/15/2018 02:50 AM, Oleksandr Andrushchenko wrote:
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
On 06/18/2018 09:07 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
Dan Carpenter has reported that there is the following static checker
warning:
drivers/gpu/drm/drm_prime.c:317 drm_gem_map_dma_buf()
warn: 'sgt' can also be NULL
314 sgt = obj->dev->
From: Oleksandr Andrushchenko
Dan Carpenter has reported that there is the following static checker
warning:
drivers/gpu/drm/drm_prime.c:317 drm_gem_map_dma_buf()
warn: 'sgt' can also be NULL
314 sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
315
316 if
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 IS_ERR was one of items.
IMHO it is still better to modify those two functions,
drm_gem_cma_prime_get_sg_table and
On 06/14/2018 01:03 AM, Boris Ostrovsky wrote:
On 06/13/2018 05:04 AM, Oleksandr Andrushchenko wrote:
On 06/13/2018 06:14 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:42 AM, Oleksandr Andrushchenko wrote:
int gntdev_dmabuf_imp_release(struct gntdev_dmabuf_priv *priv, u32
fd
On 06/13/2018 06:14 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:42 AM, Oleksandr Andrushchenko wrote:
int gntdev_dmabuf_imp_release(struct gntdev_dmabuf_priv *priv, u32 fd)
{
- return -EINVAL;
+ struct gntdev_dmabuf *gntdev_dmabuf;
+ struct dma_buf_attachment *attach
On 06/13/2018 04:49 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index a09db23e9663..e82660d81d7e 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -48,6 +48,9 @@
#include
On 06/13/2018 05:58 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, 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, but
by providing
On 06/14/2018 01:19 AM, Boris Ostrovsky wrote:
On 06/13/2018 07:57 AM, Oleksandr Andrushchenko wrote:
On 06/13/2018 05:58 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
+
+static struct gntdev_dmabuf *
+dmabuf_exp_wait_obj_get_by_fd(struct
Hi, Boris!
It seems that I have resolved all the issues now which
were mainly cleanup and code movement and 5 of 9 patches
already have r-b's. Do you, as the primary reviewer of the
series, think I can push (hopefully) the final version
of the patches? Just in case you want to look at v4 it is
On 06/13/2018 03:03 PM, Oleksandr Andrushchenko wrote:
On 06/13/2018 03:02 PM, Boris Ostrovsky wrote:
On 06/13/2018 02:26 AM, Oleksandr Andrushchenko wrote:
On 06/13/2018 03:47 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
On 06/13/2018 03:02 PM, Boris Ostrovsky wrote:
On 06/13/2018 02:26 AM, Oleksandr Andrushchenko wrote:
On 06/13/2018 03:47 AM, Boris Ostrovsky wrote:
On 06/12/2018 09:41 AM, Oleksandr Andrushchenko wrote:
From: Oleksandr Andrushchenko
diff --git a/include/xen/mem-reservation.h
b
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
This is in preparation for adding support of DMA buffer
functionality: make map/unmap related code and structures, used
privately by gntdev, ready for dma-buf extension, which will re-use
these. Rename corresponding structures as those become non-private
to gntdev
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
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
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
Reviewed-by: Boris
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
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 that proper memory reservation is made
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
Reviewed-by: Boris Ostrovsky
---
drivers/xen/grant-table.c | 54
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
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