diff options
| author | Michael D Labriola <michael.d.labriola@gmail.com> | 2019-02-20 02:08:12 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2019-02-20 15:29:29 +0300 |
| commit | 913b2cb727b7a47ccf8842d54c89f1b873c6deed (patch) | |
| tree | 9a2a1901f32dd8feab1cdcd2ddf37444fc4a7ae8 /include | |
| parent | 2f146b78d5a9cc032e1376ba3c35e8aed11f615b (diff) | |
| download | linux-913b2cb727b7a47ccf8842d54c89f1b873c6deed.tar.xz | |
drm: change func to better detect wether swiotlb is needed
This commit fixes DRM failures on Xen PV systems that were introduced in
v4.17 by the following commits:
82626363 drm: add func to get max iomem address v2
fd5fd480 drm/amdgpu: only enable swiotlb alloc when need v2
1bc3d3cc drm/radeon: only enable swiotlb path when need v2
The introduction of ->need_swiotlb to the ttm_dma_populate() conditionals
in the radeon and amdgpu device drivers causes Gnome to immediately crash
on Xen PV systems, returning the user to the login screen. The following
kernel errors get logged:
[ 28.554259] radeon_dp_aux_transfer_native: 200 callbacks suppressed
[ 31.219821] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 31.220030] [drm:radeon_gem_object_create [radeon]] *ERROR* Failed to allocate GEM object (16384000, 2, 4096, -14)
[ 31.226109] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 31.226300] [drm:radeon_gem_object_create [radeon]] *ERROR* Failed to allocate GEM object (16384000, 2, 4096, -14)
[ 31.300734] gnome-shell[1935]: segfault at 88 ip 00007f39151cd904 sp 00007ffc97611ad8 error 4 in libmutter-cogl.so[7f3915178000+aa000]
[ 31.300745] Code: 5f c3 0f 1f 40 00 48 8b 47 78 48 8b 40 40 ff e0 66 0f 1f 44 00 00 48 8b 47 78 48 8b 40 48 ff e0 66 0f 1f 44 00 00 48 8b 47 78 <48> 8b 80 88 00 00 00 ff e0 0f 1f 00 48 8b 47 78 48 8b 40 68 ff e0
[ 38.193302] radeon_dp_aux_transfer_native: 116 callbacks suppressed
[ 40.009317] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 40.009488] [drm:radeon_gem_object_create [radeon]] *ERROR* Failed to allocate GEM object (16384000, 2, 4096, -14)
[ 40.015114] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 40.015297] [drm:radeon_gem_object_create [radeon]] *ERROR* Failed to allocate GEM object (16384000, 2, 4096, -14)
[ 40.028302] gnome-shell[2431]: segfault at 2dadf40 ip 0000000002dadf40 sp 00007ffcd24ea5f8 error 15
[ 40.028306] Code: 20 6e 31 00 00 00 00 00 00 00 00 37 e3 3d 2d 7f 00 00 80 f4 e6 3d 2d 7f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 c1 00 00 00 00 00 00 00 80 e1 d2 03 00 00
This commit renames drm_get_max_iomem() to drm_need_swiotlb(), adds a
xen_pv_domain() check to it, and moves the bit shifting comparison that
always follows its usage into the function (simplifying the drm driver
code).
Signed-off-by: Michael D Labriola <michael.d.labriola@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/286987/
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_cache.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h index 97fc498dc767..987ff16b9420 100644 --- a/include/drm/drm_cache.h +++ b/include/drm/drm_cache.h @@ -38,7 +38,7 @@ void drm_clflush_pages(struct page *pages[], unsigned long num_pages); void drm_clflush_sg(struct sg_table *st); void drm_clflush_virt_range(void *addr, unsigned long length); -u64 drm_get_max_iomem(void); +bool drm_need_swiotlb(int dma_bits); static inline bool drm_arch_can_wc_memory(void) |