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From:   Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Date:   Tue, 12 Jan 2021 02:51:08 +0500
Message-ID: <CABXGCsMYkKrrTw3DTPJjLq+6oQnyXATCYi0DbqkO_UuYjvJjLg@mail.gmail.com>
Subject: Re: [drm:dm_plane_helper_prepare_fb [amdgpu]] *ERROR* Failed to pin
 framebuffer with error -12
To:     =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>
Cc:     amd-gfx list <amd-gfx@lists.freedesktop.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Harry Wentland <harry.wentland@amd.com>,
        "Deucher, Alexander" <alexander.deucher@amd.com>
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Hi Christian,

On Tue, 12 Jan 2021 at 01:45, Christian K=C3=B6nig <christian.koenig@amd.co=
m> wrote:
>
> Hi Mike,
>
> Unfortunately not, that's DC stuff. Easiest is to assign this as a bug
> tracker to our DC team.
Ok

> At least some progress. Any objections that I add your e-mail address as
> tested-by tag?
Yes, feel free add me.

> I can take a look at this one here. Looks like some missing error
> handling when allocating memory.
> Can you decode to which line number ttm_tt_swapin+0x34 points to?
$ /usr/src/kernels/`uname -r`/scripts/faddr2line
/lib/debug/lib/modules/`uname
-r`/kernel/drivers/gpu/drm/ttm/ttm.ko.debug ttm_tt_swapin+0x34
ttm_tt_swapin+0x34/0xd0:
mapping_gfp_mask at
/usr/src/debug/kernel-20210108gitf5e6c330254a/linux-5.11.0-0.rc2.20210108gi=
tf5e6c330254a.120.fc34.x86_64/./include/linux/pagemap.h:105
(discriminator 2)
(inlined by) ttm_tt_swapin at
/usr/src/debug/kernel-20210108gitf5e6c330254a/linux-5.11.0-0.rc2.20210108gi=
tf5e6c330254a.120.fc34.x86_64/drivers/gpu/drm/ttm/ttm_tt.c:210
(discriminator 2)

$ cat -s -n /usr/src/debug/kernel-20210108gitf5e6c330254a/linux-5.11.0-0.rc=
2.20210108gitf5e6c330254a.120.fc34.x86_64/drivers/gpu/drm/ttm/ttm_tt.c
| head -220 | tail -20
   201      struct page *from_page;
   202      struct page *to_page;
   203      gfp_t gfp_mask;
   204      int i, ret;
   205
   206      swap_storage =3D ttm->swap_storage;
   207      BUG_ON(swap_storage =3D=3D NULL);
   208
   209      swap_space =3D swap_storage->f_mapping;
   210      gfp_mask =3D mapping_gfp_mask(swap_space);
   211
   212      for (i =3D 0; i < ttm->num_pages; ++i) {
   213          from_page =3D shmem_read_mapping_page_gfp(swap_space, i,
   214                              gfp_mask);
   215          if (IS_ERR(from_page)) {
   216              ret =3D PTR_ERR(from_page);
   217              goto out_err;
   218          }
   219          to_page =3D ttm->pages[i];
   220          if (unlikely(to_page =3D=3D NULL)) {

> Please use this one here:
> https://gitlab.freedesktop.org/drm/amd/-/issues/new
>
> If you can't find the DC guys of hand in the assignee list just assign
> to me and I will forward.
https://gitlab.freedesktop.org/drm/amd/-/issues/1439
Ok, let's continue there.

--
Best Regards,
Mike Gavrilov.