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| author | Matthew Auld <matthew.auld@intel.com> | 2017-10-06 23:18:18 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-07 10:11:48 +0100 |
| commit | a5c08166265adc172a4cbde8ed26a1a96ce77fb7 (patch) | |
| tree | 5288c4f04d0200042f8e630b9f7a7b7a65d7a294 /drivers/gpu/drm/i915/i915_drv.h | |
| parent | b91b09eea7a15ab417aa9ed6502b3be12f5283f8 (diff) | |
| download | lwn-a5c08166265adc172a4cbde8ed26a1a96ce77fb7.tar.gz lwn-a5c08166265adc172a4cbde8ed26a1a96ce77fb7.zip | |
drm/i915: introduce page_size members
In preparation for supporting huge gtt pages for the ppgtt, we introduce
page size members for gem objects. We fill in the page sizes by
scanning the sg table.
v2: pass the sg_mask to set_pages
v3: calculate the sg_mask inline with populating the sg_table where
possible, and pass to set_pages along with the pages.
v4: bunch of improvements from Joonas
v5: fix num_pages blunder
introduce i915_sg_page_sizes helper
v6: prefer GEM_BUG_ON(sizes == 0)
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-7-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-6-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 3d4dee817381..799a90abd81f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2872,6 +2872,21 @@ static inline struct scatterlist *__sg_next(struct scatterlist *sg) (((__iter).curr += PAGE_SIZE) >= (__iter).max) ? \ (__iter) = __sgt_iter(__sg_next((__iter).sgp), false), 0 : 0) +static inline unsigned int i915_sg_page_sizes(struct scatterlist *sg) +{ + unsigned int page_sizes; + + page_sizes = 0; + while (sg) { + GEM_BUG_ON(sg->offset); + GEM_BUG_ON(!IS_ALIGNED(sg->length, PAGE_SIZE)); + page_sizes |= sg->length; + sg = __sg_next(sg); + } + + return page_sizes; +} + static inline unsigned int i915_sg_segment_size(void) { unsigned int size = swiotlb_max_segment(); @@ -3101,6 +3116,10 @@ intel_info(const struct drm_i915_private *dev_priv) #define USES_PPGTT(dev_priv) (i915_modparams.enable_ppgtt) #define USES_FULL_PPGTT(dev_priv) (i915_modparams.enable_ppgtt >= 2) #define USES_FULL_48BIT_PPGTT(dev_priv) (i915_modparams.enable_ppgtt == 3) +#define HAS_PAGE_SIZES(dev_priv, sizes) ({ \ + GEM_BUG_ON((sizes) == 0); \ + ((sizes) & ~(dev_priv)->info.page_sizes) == 0; \ +}) #define HAS_OVERLAY(dev_priv) ((dev_priv)->info.has_overlay) #define OVERLAY_NEEDS_PHYSICAL(dev_priv) \ @@ -3517,7 +3536,8 @@ i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, unsigned long n); void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj, - struct sg_table *pages); + struct sg_table *pages, + unsigned int sg_mask); int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj); static inline int __must_check |