diff options
| author |   Jason Gunthorpe <jgg@nvidia.com> | 2020-10-28 16:15:26 -0300 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2020-11-02 14:42:57 +0100 |
| commit | 7a60c2dd0f575ab14a457e99582af0ca1e072a74 (patch) | |
| tree | e243aaf15c18c1a8e45528884ffcc7caf398f6f1 /drivers/gpu/drm/i915 | |
| parent | gpu/drm: delete same check in if condition (diff) | |
| download | linux-dev-7a60c2dd0f575ab14a457e99582af0ca1e072a74.tar.xz linux-dev-7a60c2dd0f575ab14a457e99582af0ca1e072a74.zip | |
drm: Remove SCATTERLIST_MAX_SEGMENT
Since commit 9a40401cfa13 ("lib/scatterlist: Do not limit max_segment to
PAGE_ALIGNED values") the max_segment input to sg_alloc_table_from_pages()
does not have to be any special value. The new algorithm will always
create something less than what the user provides. Thus eliminate this
confusing constant.
- vmwgfx should use the HW capability, not mix in the OS page size for
calling dma_set_max_seg_size()
- i915 uses i915_sg_segment_size() both for sg_alloc_table_from_pages
and for some open coded sgl construction. This doesn't change the value
since rounddown(size, UINT_MAX) == SCATTERLIST_MAX_SEGMENT
- drm_prime_pages_to_sg uses it as a default if max_segment is zero,
UINT_MAX is fine to use directly.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Qian Cai <cai@lca.pw>
Cc: "Ursulin, Tvrtko" <tvrtko.ursulin@intel.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/0-v1-44733fccd781+13d-rm_scatterlist_max_jgg@nvidia.com
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scatterlist.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h index b7b59328cb76..883dd8d09d6b 100644 --- a/drivers/gpu/drm/i915/i915_scatterlist.h +++ b/drivers/gpu/drm/i915/i915_scatterlist.h @@ -112,7 +112,7 @@ static inline unsigned int i915_sg_segment_size(void) unsigned int size = swiotlb_max_segment(); if (size == 0) - return SCATTERLIST_MAX_SEGMENT; + size = UINT_MAX; size = rounddown(size, PAGE_SIZE); /* swiotlb_max_segment_size can return 1 byte when it means one page. */ |