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drm/i915/gtt: Introduce i915_page_dir_dma_addr

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The legacy mode mm switch and the execlist context assignment
needs dma address for the page directories.

Introduce a function that encapsulates the scratch_pd dma
fallback if no pd is found.

v2: Rebase, s/ring/req

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Mika Kuoppala
2015-06-25 18:35:06 +03:00
committed by Daniel Vetter
parent c44ef60e43
commit d852c7bf90
3 changed files with 11 additions and 7 deletions
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drivers/gpu/drm/i915/i915_gem_gtt.h
+8
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@@ -470,6 +470,14 @@ static inline size_t gen8_pte_count(uint64_t address, uint64_t length)
return i915_pte_count(address, length, GEN8_PDE_SHIFT);
}
static inline dma_addr_t
i915_page_dir_dma_addr(const struct i915_hw_ppgtt *ppgtt, const unsigned n)
{
return test_bit(n, ppgtt->pdp.used_pdpes) ?
ppgtt->pdp.page_directory[n]->daddr :
ppgtt->scratch_pd->daddr;
}
int i915_gem_gtt_init(struct drm_device *dev);
void i915_gem_init_global_gtt(struct drm_device *dev);
void i915_global_gtt_cleanup(struct drm_device *dev);