From: Daniel Vetter Date: Wed, 6 Aug 2014 18:19:54 +0000 (+0200) Subject: drm/i915: Initialize the aliasing ppgtt as part of global gtt X-Git-Tag: v3.18-rc1~44^2~73^2~35 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=fa76da3499f1789f0e37d3bbcdc320bdf47c89ca;p=~emulex%2Finfiniband.git drm/i915: Initialize the aliasing ppgtt as part of global gtt Stuffing this into the context setup code doesn't make a lot of sense. Also reusing the real ppgtt setup code makes even less sense since the aliasing ppgtt isn't a real address space. Leaving all that stuff unitialized will make sure that we catch any abusers promptly. This is also a prep work to clean up the context->ppgtt link. v2: Fix up the logic fail, I've fumbled it so badly to completely disable ppgtt on gen6. Spotted by Ville and Michel. Also move around the pde write into the gen6 init function, since otherwise it won't work at all. v3: Only initialize the aliasing ppgtt when we actually enable it. Cc: "Thierry, Michel" Cc: Ville Syrjälä Reviewed-by: Michel Thierry [danvet: Squash in fixup from Fengguang Wu.] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index eece059a844..7093f5df9ee 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -279,17 +279,6 @@ i915_gem_create_context(struct drm_device *dev, goto err_unpin; } else ctx->vm = &ppgtt->base; - - /* This case is reserved for the global default context and - * should only happen once. */ - if (is_global_default_ctx) { - if (WARN_ON(dev_priv->mm.aliasing_ppgtt)) { - ret = -EEXIST; - goto err_unpin; - } - - dev_priv->mm.aliasing_ppgtt = ppgtt; - } } else if (USES_PPGTT(dev)) { /* For platforms which only have aliasing PPGTT, we fake the * address space and refcounting. */ @@ -368,7 +357,7 @@ int i915_gem_context_init(struct drm_device *dev) } } - ctx = i915_gem_create_context(dev, NULL, USES_PPGTT(dev)); + ctx = i915_gem_create_context(dev, NULL, USES_FULL_PPGTT(dev)); if (IS_ERR(ctx)) { DRM_ERROR("Failed to create default global context (error %ld)\n", PTR_ERR(ctx)); diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index b7dcf72126f..b033ff770ac 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1130,35 +1130,38 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->node.size >> 20, ppgtt->node.start / PAGE_SIZE); + gen6_write_pdes(ppgtt); + DRM_DEBUG("Adding PPGTT at offset %x\n", + ppgtt->pd_offset << 10); + return 0; } -int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt) +static int __hw_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt) { struct drm_i915_private *dev_priv = dev->dev_private; - int ret = 0; ppgtt->base.dev = dev; ppgtt->base.scratch = dev_priv->gtt.base.scratch; if (INTEL_INFO(dev)->gen < 8) - ret = gen6_ppgtt_init(ppgtt); + return gen6_ppgtt_init(ppgtt); else if (IS_GEN8(dev)) - ret = gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total); + return gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total); else BUG(); +} +int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int ret = 0; - if (!ret) { - struct drm_i915_private *dev_priv = dev->dev_private; + ret = __hw_ppgtt_init(dev, ppgtt); + if (ret == 0) { kref_init(&ppgtt->ref); drm_mm_init(&ppgtt->base.mm, ppgtt->base.start, ppgtt->base.total); i915_init_vm(dev_priv, &ppgtt->base); - if (INTEL_INFO(dev)->gen < 8) { - gen6_write_pdes(ppgtt); - DRM_DEBUG("Adding PPGTT at offset %x\n", - ppgtt->pd_offset << 10); - } } return ret; @@ -1699,6 +1702,7 @@ int i915_gem_setup_global_gtt(struct drm_device *dev, struct drm_mm_node *entry; struct drm_i915_gem_object *obj; unsigned long hole_start, hole_end; + int ret; BUG_ON(mappable_end > end); @@ -1710,7 +1714,7 @@ int i915_gem_setup_global_gtt(struct drm_device *dev, /* Mark any preallocated objects as occupied */ list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { struct i915_vma *vma = i915_gem_obj_to_vma(obj, ggtt_vm); - int ret; + DRM_DEBUG_KMS("reserving preallocated space: %lx + %zx\n", i915_gem_obj_ggtt_offset(obj), obj->base.size); @@ -1737,6 +1741,20 @@ int i915_gem_setup_global_gtt(struct drm_device *dev, /* And finally clear the reserved guard page */ ggtt_vm->clear_range(ggtt_vm, end - PAGE_SIZE, PAGE_SIZE, true); + if (USES_PPGTT(dev) && !USES_FULL_PPGTT(dev)) { + struct i915_hw_ppgtt *ppgtt; + + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return -ENOMEM; + + ret = __hw_ppgtt_init(dev, ppgtt); + if (ret != 0) + return ret; + + dev_priv->mm.aliasing_ppgtt = ppgtt; + } + return 0; }