forked from Minki/linux
678d96fbb3
Instead of implementing the full tracking + dynamic allocation, this patch does a bit less than half of the work, by tracking and warning on unexpected conditions. The tracking itself follows which PTEs within a page table are currently being used for objects. The next patch will modify this to actually allocate the page tables only when necessary. With the current patch there isn't much in the way of making a gen agnostic range allocation function. However, in the next patch we'll add more specificity which makes having separate functions a bit easier to manage. One important change introduced here is that DMA mappings are created/destroyed at the same page directories/tables are allocated/deallocated. Notice that aliasing PPGTT is not managed here. The patch which actually begins dynamic allocation/teardown explains the reasoning for this. v2: s/pdp.page_directory/pdp.page_directories Make a scratch page allocation helper v3: Rebase and expand commit message. v4: Allocate required pagetables only when it is needed, _bind_to_vm instead of bind_vma (Daniel). v5: Rebased to remove the unnecessary noise in the diff, also: - PDE mask is GEN agnostic, renamed GEN6_PDE_MASK to I915_PDE_MASK. - Removed unnecessary checks in gen6_alloc_va_range. - Changed map/unmap_px_single macros to use dma functions directly and be part of a static inline function instead. - Moved drm_device plumbing through page tables operation to its own patch. - Moved allocate/teardown_va_range calls until they are fully implemented (in subsequent patch). - Merged pt and scratch_pt unmap_and_free path. - Moved scratch page allocator helper to the patch that will use it. v6: Reduce complexity by not tearing down pagetables dynamically, the same can be achieved while freeing empty vms. (Daniel) v7: s/i915_dma_map_px_single/i915_dma_map_single s/gen6_write_pdes/gen6_write_pde Prevent a NULL case when only GGTT is available. (Mika) v8: Rebased after s/page_tables/page_table/. v9: Reworked i915_pte_index and i915_pte_count. Also exercise bitmap allocation here (gen6_alloc_va_range) and fix incorrect write_page_range in i915_gem_restore_gtt_mappings (Mika). Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v3+) Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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| drm | ||
| host1x | ||
| ipu-v3 | ||
| vga | ||
| Makefile | ||