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drm/i915/gen8: begin bitmap tracking

Browse Source 
Like with gen6/7, we can enable bitmap tracking with all the
preallocations to make sure things actually don't blow up.

v2: Rebased to match changes from previous patches.
v3: Without teardown logic, rely on used_pdpes and used_pdes when
freeing page tables.
v4: Rebased after s/page_tables/page_table/.
v5: Rebased after page table generalizations.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v2+)
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Michel Thierry
2015-04-08 12:13:33 +01:00
committed by Daniel Vetter
parent e5815a2e05
commit 33c8819f1b
2 changed files with 54 additions and 12 deletions
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drivers/gpu/drm/i915/i915_gem_gtt.h
+7
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@@ -220,11 +220,13 @@ struct i915_page_directory {
dma_addr_t daddr;
};
unsigned long *used_pdes;
struct i915_page_table *page_table[I915_PDES]; /* PDEs */
};
struct i915_page_directory_pointer {
/* struct page *page; */
DECLARE_BITMAP(used_pdpes, GEN8_LEGACY_PDPES);
struct i915_page_directory *page_directory[GEN8_LEGACY_PDPES];
};
@@ -453,6 +455,11 @@ static inline uint32_t gen8_pml4e_index(uint64_t address)
return 0;
}
static inline size_t gen8_pte_count(uint64_t address, uint64_t length)
{
return i915_pte_count(address, length, GEN8_PDE_SHIFT);
}
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);