From 73eeea537b1bb9c53c9e406a16354f6bc9b2be62 Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Thu, 25 Jun 2015 18:35:10 +0300 Subject: [PATCH] drm/i915/gtt: Introduce fill_page_dma() When we setup page directories and tables, we point the entries to a to the next level scratch structure. Make this generic by introducing a fill_page_dma which maps and flushes. We also need 32 bit variant for legacy gens. v2: Fix flushes and handle valleyview (Ville) v3: Now really fix flushes (Michel, Ville) Reviewed-by: Michel Thierry Signed-off-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_gtt.c | 74 ++++++++++++++++------------- 1 file changed, 40 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 21fba03dcd62..734ffd240cd6 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -330,6 +330,34 @@ static void cleanup_page_dma(struct drm_device *dev, struct i915_page_dma *p) memset(p, 0, sizeof(*p)); } +static void fill_page_dma(struct drm_device *dev, struct i915_page_dma *p, + const uint64_t val) +{ + int i; + uint64_t * const vaddr = kmap_atomic(p->page); + + for (i = 0; i < 512; i++) + vaddr[i] = val; + + /* There are only few exceptions for gen >=6. chv and bxt. + * And we are not sure about the latter so play safe for now. + */ + if (IS_CHERRYVIEW(dev) || IS_BROXTON(dev)) + drm_clflush_virt_range(vaddr, PAGE_SIZE); + + kunmap_atomic(vaddr); +} + +static void fill_page_dma_32(struct drm_device *dev, struct i915_page_dma *p, + const uint32_t val32) +{ + uint64_t v = val32; + + v = v << 32 | val32; + + fill_page_dma(dev, p, v); +} + static void free_pt(struct drm_device *dev, struct i915_page_table *pt) { cleanup_page_dma(dev, &pt->base); @@ -340,19 +368,11 @@ static void free_pt(struct drm_device *dev, struct i915_page_table *pt) static void gen8_initialize_pt(struct i915_address_space *vm, struct i915_page_table *pt) { - gen8_pte_t *pt_vaddr, scratch_pte; - int i; - - pt_vaddr = kmap_atomic(pt->base.page); - scratch_pte = gen8_pte_encode(vm->scratch.addr, - I915_CACHE_LLC, true); + gen8_pte_t scratch_pte; - for (i = 0; i < GEN8_PTES; i++) - pt_vaddr[i] = scratch_pte; + scratch_pte = gen8_pte_encode(vm->scratch.addr, I915_CACHE_LLC, true); - if (!HAS_LLC(vm->dev)) - drm_clflush_virt_range(pt_vaddr, PAGE_SIZE); - kunmap_atomic(pt_vaddr); + fill_page_dma(vm->dev, &pt->base, scratch_pte); } static struct i915_page_table *alloc_pt(struct drm_device *dev) @@ -586,20 +606,13 @@ static void gen8_initialize_pd(struct i915_address_space *vm, struct i915_page_directory *pd) { struct i915_hw_ppgtt *ppgtt = - container_of(vm, struct i915_hw_ppgtt, base); - gen8_pde_t *page_directory; - struct i915_page_table *pt; - int i; + container_of(vm, struct i915_hw_ppgtt, base); + gen8_pde_t scratch_pde; - page_directory = kmap_atomic(pd->base.page); - pt = ppgtt->scratch_pt; - for (i = 0; i < I915_PDES; i++) - /* Map the PDE to the page table */ - __gen8_do_map_pt(page_directory + i, pt, vm->dev); + scratch_pde = gen8_pde_encode(vm->dev, ppgtt->scratch_pt->base.daddr, + I915_CACHE_LLC); - if (!HAS_LLC(vm->dev)) - drm_clflush_virt_range(page_directory, PAGE_SIZE); - kunmap_atomic(page_directory); + fill_page_dma(vm->dev, &pd->base, scratch_pde); } static void gen8_free_page_tables(struct i915_page_directory *pd, struct drm_device *dev) @@ -1255,22 +1268,15 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, } static void gen6_initialize_pt(struct i915_address_space *vm, - struct i915_page_table *pt) + struct i915_page_table *pt) { - gen6_pte_t *pt_vaddr, scratch_pte; - int i; + gen6_pte_t scratch_pte; WARN_ON(vm->scratch.addr == 0); - scratch_pte = vm->pte_encode(vm->scratch.addr, - I915_CACHE_LLC, true, 0); - - pt_vaddr = kmap_atomic(pt->base.page); - - for (i = 0; i < GEN6_PTES; i++) - pt_vaddr[i] = scratch_pte; + scratch_pte = vm->pte_encode(vm->scratch.addr, I915_CACHE_LLC, true, 0); - kunmap_atomic(pt_vaddr); + fill_page_dma_32(vm->dev, &pt->base, scratch_pte); } static int gen6_alloc_va_range(struct i915_address_space *vm, -- GitLab