From: Daniel Vetter <daniel@ffwll.ch>
To: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: daniel.vetter@ffwll.ch, michel@daenzer.net,
dri-devel@lists.freedesktop.org, ppaalanen@gmail.com,
amd-gfx@lists.freedesktop.org, Daniel Vetter <daniel@ffwll.ch>,
ckoenig.leichtzumerken@gmail.com, alexdeucher@gmail.com
Subject: Re: [PATCH v2 3/8] drm/ttm: Add unampping of the entire device address space
Date: Tue, 23 Jun 2020 12:25:51 +0200 [thread overview]
Message-ID: <20200623102551.GL20149@phenom.ffwll.local> (raw)
In-Reply-To: <3a365581-0f00-32de-6656-77348dcd0ea2@amd.com>
On Tue, Jun 23, 2020 at 01:00:02AM -0400, Andrey Grodzovsky wrote:
>
> On 6/22/20 5:45 AM, Daniel Vetter wrote:
> > On Sun, Jun 21, 2020 at 02:03:03AM -0400, Andrey Grodzovsky wrote:
> > > Helper function to be used to invalidate all BOs CPU mappings
> > > once device is removed.
> > >
> > > Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
> > This seems to be missing the code to invalidate all the dma-buf mmaps?
> >
> > Probably needs more testcases if you're not yet catching this. Or am I
> > missing something, and we're exchanging the the address space also for
> > dma-buf?
> > -Daniel
>
>
> IMHO the device address space includes all user clients having a CPU view of
> the BO either from direct mapping though drm file or by mapping through
> imported BO's FD.
Uh this is all very confusing and very much midlayer-y thanks to ttm.
I think a much better solution would be to have a core gem helper for
this (well not even gem really, this is core drm), which directly uses
drm_device->anon_inode->i_mapping.
Then
a) it clearly matches what drm_prime.c does on export
b) can be reused across all drivers, not just ttm
So much better.
What's more, we could then very easily make the generic
drm_dev_unplug_and_unmap helper I've talked about for the amdgpu patch,
which I think would be really neat&pretty.
Thoughts?
-Daniel
>
> Andrey
>
>
> >
> > > ---
> > > drivers/gpu/drm/ttm/ttm_bo.c | 8 ++++++--
> > > include/drm/ttm/ttm_bo_driver.h | 7 +++++++
> > > 2 files changed, 13 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> > > index c5b516f..926a365 100644
> > > --- a/drivers/gpu/drm/ttm/ttm_bo.c
> > > +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> > > @@ -1750,10 +1750,14 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
> > > ttm_bo_unmap_virtual_locked(bo);
> > > ttm_mem_io_unlock(man);
> > > }
> > > -
> > > -
> > > EXPORT_SYMBOL(ttm_bo_unmap_virtual);
> > > +void ttm_bo_unmap_virtual_address_space(struct ttm_bo_device *bdev)
> > > +{
> > > + unmap_mapping_range(bdev->dev_mapping, 0, 0, 1);
> > > +}
> > > +EXPORT_SYMBOL(ttm_bo_unmap_virtual_address_space);
> > > +
> > > int ttm_bo_wait(struct ttm_buffer_object *bo,
> > > bool interruptible, bool no_wait)
> > > {
> > > diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> > > index c9e0fd0..39ea44f 100644
> > > --- a/include/drm/ttm/ttm_bo_driver.h
> > > +++ b/include/drm/ttm/ttm_bo_driver.h
> > > @@ -601,6 +601,13 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
> > > void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
> > > /**
> > > + * ttm_bo_unmap_virtual_address_space
> > > + *
> > > + * @bdev: tear down all the virtual mappings for this device
> > > + */
> > > +void ttm_bo_unmap_virtual_address_space(struct ttm_bo_device *bdev);
> > > +
> > > +/**
> > > * ttm_bo_unmap_virtual
> > > *
> > > * @bo: tear down the virtual mappings for this BO
> > > --
> > > 2.7.4
> > >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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next prev parent reply other threads:[~2020-06-23 10:25 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-21 6:03 [PATCH v2 0/8] RFC Support hot device unplug in amdgpu Andrey Grodzovsky
2020-06-21 6:03 ` [PATCH v2 1/8] drm: Add dummy page per device or GEM object Andrey Grodzovsky
2020-06-22 9:35 ` Daniel Vetter
2020-06-22 14:21 ` Pekka Paalanen
2020-06-22 14:24 ` Daniel Vetter
2020-06-22 14:28 ` Pekka Paalanen
2020-11-09 20:34 ` Andrey Grodzovsky
2020-11-15 6:39 ` Andrey Grodzovsky
2020-06-22 13:18 ` Christian König
2020-06-22 14:23 ` Daniel Vetter
2020-06-22 14:32 ` Andrey Grodzovsky
2020-06-22 17:45 ` Christian König
2020-06-22 17:50 ` Daniel Vetter
2020-11-09 20:53 ` Andrey Grodzovsky
2020-11-13 20:52 ` Andrey Grodzovsky
2020-11-14 8:41 ` Christian König
2020-11-14 9:51 ` Daniel Vetter
2020-11-14 9:57 ` Daniel Vetter
2020-11-16 9:42 ` Michel Dänzer
2020-11-15 6:34 ` Andrey Grodzovsky
2020-11-16 9:48 ` Christian König
2020-11-16 19:00 ` Andrey Grodzovsky
2020-11-16 20:36 ` Christian König
2020-11-16 20:42 ` Andrey Grodzovsky
2020-11-19 10:01 ` Christian König
2020-06-21 6:03 ` [PATCH v2 2/8] drm/ttm: Remap all page faults to per process dummy page Andrey Grodzovsky
2020-06-22 9:41 ` Daniel Vetter
2020-06-24 3:31 ` Andrey Grodzovsky
2020-06-24 7:19 ` Daniel Vetter
2020-11-10 17:41 ` Andrey Grodzovsky
2020-06-22 19:30 ` Christian König
2020-06-21 6:03 ` [PATCH v2 3/8] drm/ttm: Add unampping of the entire device address space Andrey Grodzovsky
2020-06-22 9:45 ` Daniel Vetter
2020-06-23 5:00 ` Andrey Grodzovsky
2020-06-23 10:25 ` Daniel Vetter [this message]
2020-06-23 12:55 ` Christian König
2020-06-22 19:37 ` Christian König
2020-06-22 19:47 ` Alex Deucher
2020-06-21 6:03 ` [PATCH v2 4/8] drm/amdgpu: Split amdgpu_device_fini into early and late Andrey Grodzovsky
2020-06-22 9:48 ` Daniel Vetter
2020-11-12 4:19 ` Andrey Grodzovsky
2020-11-12 9:29 ` Daniel Vetter
2020-06-21 6:03 ` [PATCH v2 5/8] drm/amdgpu: Refactor sysfs removal Andrey Grodzovsky
2020-06-22 9:51 ` Daniel Vetter
2020-06-22 11:21 ` Greg KH
2020-06-22 16:07 ` Andrey Grodzovsky
2020-06-22 16:45 ` Greg KH
2020-06-23 4:51 ` Andrey Grodzovsky
2020-06-23 6:05 ` Greg KH
2020-06-24 3:04 ` Andrey Grodzovsky
2020-06-24 6:11 ` Greg KH
2020-06-25 1:52 ` Andrey Grodzovsky
2020-11-10 17:54 ` Andrey Grodzovsky
2020-11-10 17:59 ` Greg KH
2020-11-11 15:13 ` Andrey Grodzovsky
2020-11-11 15:34 ` Greg KH
2020-11-11 15:45 ` Andrey Grodzovsky
2020-11-11 16:06 ` Greg KH
2020-11-11 16:34 ` Andrey Grodzovsky
2020-12-02 15:48 ` Andrey Grodzovsky
2020-12-02 17:34 ` Greg KH
2020-12-02 18:02 ` Andrey Grodzovsky
2020-12-02 18:20 ` Greg KH
2020-12-02 18:40 ` Andrey Grodzovsky
2020-06-22 13:19 ` Christian König
2020-06-21 6:03 ` [PATCH v2 6/8] drm/amdgpu: Unmap entire device address space on device remove Andrey Grodzovsky
2020-06-22 9:56 ` Daniel Vetter
2020-06-22 19:38 ` Christian König
2020-06-22 19:48 ` Alex Deucher
2020-06-23 10:22 ` Daniel Vetter
2020-06-23 13:16 ` Christian König
2020-06-24 3:12 ` Andrey Grodzovsky
2020-06-21 6:03 ` [PATCH v2 7/8] drm/amdgpu: Fix sdma code crash post device unplug Andrey Grodzovsky
2020-06-22 9:55 ` Daniel Vetter
2020-06-22 19:40 ` Christian König
2020-06-23 5:11 ` Andrey Grodzovsky
2020-06-23 7:14 ` Christian König
2020-06-21 6:03 ` [PATCH v2 8/8] drm/amdgpu: Prevent any job recoveries after device is unplugged Andrey Grodzovsky
2020-06-22 9:53 ` Daniel Vetter
2020-11-17 18:38 ` Andrey Grodzovsky
2020-11-17 18:52 ` Daniel Vetter
2020-11-17 19:18 ` Andrey Grodzovsky
2020-11-17 19:49 ` Daniel Vetter
2020-11-17 20:07 ` Andrey Grodzovsky
2020-11-18 7:39 ` Daniel Vetter
2020-11-18 12:01 ` Christian König
2020-11-18 15:43 ` Luben Tuikov
2020-11-18 16:20 ` Andrey Grodzovsky
2020-11-19 7:55 ` Christian König
2020-11-19 15:02 ` Andrey Grodzovsky
2020-11-19 15:29 ` Daniel Vetter
2020-11-19 21:24 ` Andrey Grodzovsky
2020-11-18 0:46 ` Luben Tuikov
2020-06-22 9:46 ` [PATCH v2 0/8] RFC Support hot device unplug in amdgpu Daniel Vetter
2020-06-23 5:14 ` Andrey Grodzovsky
2020-06-23 9:04 ` Michel Dänzer
2020-06-24 3:21 ` Andrey Grodzovsky
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