From 17f297b427a32ef5524a494de331c68366e8226d Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 7 Jun 2018 17:30:40 +0100 Subject: [PATCH] drm/i915/gtt: Push allocation to hw ppgtt constructor In the next patch, we will subclass the gen6 hw_ppgtt. In order, for the two different generations of hw ppgtt stucts to be of different size, push the allocation down to the constructor. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Cc: Mika Kuoppala Cc: Matthew Auld Reviewed-by: Joonas Lahtinen Link: https://patchwork.freedesktop.org/patch/msgid/20180607163040.9781-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_gtt.c | 140 ++++++++++++++------------ drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 16 +-- 2 files changed, 83 insertions(+), 73 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index d841bf29..912d6c4 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1562,32 +1562,36 @@ unwind: * space. * */ -static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) +static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915) { - struct i915_address_space *vm = &ppgtt->vm; - struct drm_i915_private *dev_priv = vm->i915; - int ret; + struct i915_hw_ppgtt *ppgtt; + int err; + + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return ERR_PTR(-ENOMEM); - ppgtt->vm.total = USES_FULL_48BIT_PPGTT(dev_priv) ? + ppgtt->vm.i915 = i915; + ppgtt->vm.dma = &i915->drm.pdev->dev; + + ppgtt->vm.total = USES_FULL_48BIT_PPGTT(i915) ? 1ULL << 48 : 1ULL << 32; /* 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_priv) || IS_BROXTON(dev_priv)) + if (IS_CHERRYVIEW(i915) || IS_BROXTON(i915)) ppgtt->vm.pt_kmap_wc = true; - ret = gen8_init_scratch(&ppgtt->vm); - if (ret) { - ppgtt->vm.total = 0; - return ret; - } + err = gen8_init_scratch(&ppgtt->vm); + if (err) + goto err_free; - if (use_4lvl(vm)) { - ret = setup_px(&ppgtt->vm, &ppgtt->pml4); - if (ret) - goto free_scratch; + if (use_4lvl(&ppgtt->vm)) { + err = setup_px(&ppgtt->vm, &ppgtt->pml4); + if (err) + goto err_scratch; gen8_initialize_pml4(&ppgtt->vm, &ppgtt->pml4); @@ -1595,15 +1599,15 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->vm.insert_entries = gen8_ppgtt_insert_4lvl; ppgtt->vm.clear_range = gen8_ppgtt_clear_4lvl; } else { - ret = __pdp_init(&ppgtt->vm, &ppgtt->pdp); - if (ret) - goto free_scratch; + err = __pdp_init(&ppgtt->vm, &ppgtt->pdp); + if (err) + goto err_scratch; - if (intel_vgpu_active(dev_priv)) { - ret = gen8_preallocate_top_level_pdp(ppgtt); - if (ret) { + if (intel_vgpu_active(i915)) { + err = gen8_preallocate_top_level_pdp(ppgtt); + if (err) { __pdp_fini(&ppgtt->pdp); - goto free_scratch; + goto err_scratch; } } @@ -1612,7 +1616,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->vm.clear_range = gen8_ppgtt_clear_3lvl; } - if (intel_vgpu_active(dev_priv)) + if (intel_vgpu_active(i915)) gen8_ppgtt_notify_vgt(ppgtt, true); ppgtt->vm.cleanup = gen8_ppgtt_cleanup; @@ -1623,11 +1627,13 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->vm.vma_ops.set_pages = ppgtt_set_pages; ppgtt->vm.vma_ops.clear_pages = clear_pages; - return 0; + return ppgtt; -free_scratch: +err_scratch: gen8_free_scratch(&ppgtt->vm); - return ret; +err_free: + kfree(ppgtt); + return ERR_PTR(err); } static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) @@ -1638,8 +1644,7 @@ static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) u32 pd_entry, pte, pde; u32 start = 0, length = ppgtt->vm.total; - scratch_pte = vm->pte_encode(vm->scratch_page.daddr, - I915_CACHE_LLC, 0); + scratch_pte = vm->pte_encode(vm->scratch_page.daddr, I915_CACHE_LLC, 0); gen6_for_each_pde(unused, &ppgtt->pd, start, length, pde) { u32 expected; @@ -2027,36 +2032,41 @@ static void gen6_scratch_va_range(struct i915_hw_ppgtt *ppgtt, ppgtt->pd.page_table[pde] = ppgtt->vm.scratch_pt; } -static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) +static struct i915_hw_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915) { - struct drm_i915_private *dev_priv = ppgtt->vm.i915; - struct i915_ggtt *ggtt = &dev_priv->ggtt; - int ret; + struct i915_ggtt * const ggtt = &i915->ggtt; + struct i915_hw_ppgtt *ppgtt; + int err; + + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return ERR_PTR(-ENOMEM); + + ppgtt->vm.i915 = i915; + ppgtt->vm.dma = &i915->drm.pdev->dev; ppgtt->vm.pte_encode = ggtt->vm.pte_encode; - if (intel_vgpu_active(dev_priv) || IS_GEN6(dev_priv)) + if (intel_vgpu_active(i915) || IS_GEN6(i915)) ppgtt->switch_mm = gen6_mm_switch; - else if (IS_HASWELL(dev_priv)) + else if (IS_HASWELL(i915)) ppgtt->switch_mm = hsw_mm_switch; - else if (IS_GEN7(dev_priv)) + else if (IS_GEN7(i915)) ppgtt->switch_mm = gen7_mm_switch; else BUG(); - ret = gen6_ppgtt_alloc(ppgtt); - if (ret) - return ret; + err = gen6_ppgtt_alloc(ppgtt); + if (err) + goto err_free; ppgtt->vm.total = I915_PDES * GEN6_PTES * PAGE_SIZE; gen6_scratch_va_range(ppgtt, 0, ppgtt->vm.total); gen6_write_page_range(ppgtt, 0, ppgtt->vm.total); - ret = gen6_alloc_va_range(&ppgtt->vm, 0, ppgtt->vm.total); - if (ret) { - gen6_ppgtt_cleanup(&ppgtt->vm); - return ret; - } + err = gen6_alloc_va_range(&ppgtt->vm, 0, ppgtt->vm.total); + if (err) + goto err_cleanup; ppgtt->vm.clear_range = gen6_ppgtt_clear_range; ppgtt->vm.insert_entries = gen6_ppgtt_insert_entries; @@ -2075,19 +2085,13 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) DRM_DEBUG_DRIVER("Adding PPGTT at offset %x\n", ppgtt->pd.base.ggtt_offset << 10); - return 0; -} - -static int __hw_ppgtt_init(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_private *dev_priv) -{ - ppgtt->vm.i915 = dev_priv; - ppgtt->vm.dma = &dev_priv->drm.pdev->dev; + return ppgtt; - if (INTEL_GEN(dev_priv) < 8) - return gen6_ppgtt_init(ppgtt); - else - return gen8_ppgtt_init(ppgtt); +err_cleanup: + gen6_ppgtt_cleanup(&ppgtt->vm); +err_free: + kfree(ppgtt); + return ERR_PTR(err); } static void i915_address_space_init(struct i915_address_space *vm, @@ -2173,26 +2177,28 @@ int i915_ppgtt_init_hw(struct drm_i915_private *dev_priv) return 0; } +static struct i915_hw_ppgtt * +__hw_ppgtt_create(struct drm_i915_private *i915) +{ + if (INTEL_GEN(i915) < 8) + return gen6_ppgtt_create(i915); + else + return gen8_ppgtt_create(i915); +} + struct i915_hw_ppgtt * -i915_ppgtt_create(struct drm_i915_private *dev_priv, +i915_ppgtt_create(struct drm_i915_private *i915, struct drm_i915_file_private *fpriv, const char *name) { struct i915_hw_ppgtt *ppgtt; - int ret; - ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); - if (!ppgtt) - return ERR_PTR(-ENOMEM); - - ret = __hw_ppgtt_init(ppgtt, dev_priv); - if (ret) { - kfree(ppgtt); - return ERR_PTR(ret); - } + ppgtt = __hw_ppgtt_create(i915); + if (IS_ERR(ppgtt)) + return ppgtt; kref_init(&ppgtt->ref); - i915_address_space_init(&ppgtt->vm, dev_priv, name); + i915_address_space_init(&ppgtt->vm, i915, name); ppgtt->vm.file = fpriv; trace_i915_ppgtt_create(&ppgtt->vm); diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 58ab5e8..f80cf7c 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -147,12 +147,16 @@ static int igt_ppgtt_alloc(void *arg) return -ENOMEM; mutex_lock(&dev_priv->drm.struct_mutex); - err = __hw_ppgtt_init(ppgtt, dev_priv); - if (err) - goto err_ppgtt; + ppgtt = __hw_ppgtt_create(dev_priv); + if (IS_ERR(ppgtt)) { + err = PTR_ERR(ppgtt); + goto err_unlock; + } - if (!ppgtt->vm.allocate_va_range) + if (!ppgtt->vm.allocate_va_range) { + err = 0; goto err_ppgtt_cleanup; + } /* Check we can allocate the entire range */ for (size = 4096; @@ -189,9 +193,9 @@ static int igt_ppgtt_alloc(void *arg) err_ppgtt_cleanup: ppgtt->vm.cleanup(&ppgtt->vm); -err_ppgtt: - mutex_unlock(&dev_priv->drm.struct_mutex); kfree(ppgtt); +err_unlock: + mutex_unlock(&dev_priv->drm.struct_mutex); return err; } -- 2.7.4