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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-19 16:54:28 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-19 17:13:36 +0100 |
| commit | c58305af1835095ddc25ee6f548ac05915e66ac5 (patch) | |
| tree | c397de7bd3efb5dc92ba0feab1a5e0be2b325caa /drivers/gpu/drm/i915/i915_drv.h | |
| parent | f7bbe7883c3f119714fd09a8ceaac8075ba04dfe (diff) | |
| download | talos-obmc-linux-c58305af1835095ddc25ee6f548ac05915e66ac5.tar.gz talos-obmc-linux-c58305af1835095ddc25ee6f548ac05915e66ac5.zip | |
drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass
Very old numbers indicate this is a 66% improvement when remapping the
entire object for fence contention - due to the elimination of
track_pfn_insert and its strcmp.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Testcase: igt/gem_fence_upload/performance
Testcase: igt/gem_mmap_gtt
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160819155428.1670-6-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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 016425c0b475..9cd102cd931e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3931,6 +3931,11 @@ static inline bool __i915_request_irq_complete(struct drm_i915_gem_request *req) void i915_memcpy_init_early(struct drm_i915_private *dev_priv); bool i915_memcpy_from_wc(void *dst, const void *src, unsigned long len); +/* i915_mm.c */ +int remap_io_mapping(struct vm_area_struct *vma, + unsigned long addr, unsigned long pfn, unsigned long size, + struct io_mapping *iomap); + #define ptr_mask_bits(ptr) ({ \ unsigned long __v = (unsigned long)(ptr); \ (typeof(ptr))(__v & PAGE_MASK); \ |
