diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 5704d6437c64..9bee72c2c3b1 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -80,6 +80,19 @@ static inline gen8_gtt_pte_t gen8_pte_encode(dma_addr_t addr, return pte; } +static inline gen8_ppgtt_pde_t gen8_pde_encode(struct drm_device *dev, + dma_addr_t addr, + enum i915_cache_level level) +{ + gen8_ppgtt_pde_t pde = _PAGE_PRESENT | _PAGE_RW; + pde |= addr; + if (level != I915_CACHE_NONE) + pde |= PPAT_CACHED_PDE_INDEX; + else + pde |= PPAT_UNCACHED_INDEX; + return pde; +} + static gen6_gtt_pte_t snb_pte_encode(dma_addr_t addr, enum i915_cache_level level, bool valid) @@ -285,6 +298,20 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) } } + /* For now, the PPGTT helper functions all require that the PDEs are + * plugged in correctly. So we do that now/here. For aliasing PPGTT, we + * will never need to touch the PDEs again */ + for (i = 0; i < max_pdp; i++) { + gen8_ppgtt_pde_t *pd_vaddr; + pd_vaddr = kmap_atomic(&ppgtt->pd_pages[i]); + for (j = 0; j < GEN8_PDES_PER_PAGE; j++) { + dma_addr_t addr = ppgtt->gen8_pt_dma_addr[i][j]; + pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr, + I915_CACHE_LLC); + } + kunmap_atomic(pd_vaddr); + } + DRM_DEBUG_DRIVER("Allocated %d pages for page directories (%d wasted)\n", ppgtt->num_pd_pages, ppgtt->num_pd_pages - max_pdp); DRM_DEBUG_DRIVER("Allocated %d pages for page tables (%lld wasted)\n", |