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drm/i915: Remove i915->kernel_context

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Allocate only an internal intel_context for the kernel_context, forgoing
a global GEM context for internal use as we only require a separate
address space (for our own protection).

Now having weaned GT from requiring ce->gem_context, we can stop
referencing it entirely. This also means we no longer have to create random
and unnecessary GEM contexts for internal use.

GEM contexts are now entirely for tracking GEM clients, and intel_context
the execution environment on the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191221160324.1073045-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-12-21 16:03:24 +00:00
parent ed7dd73cd8
commit e6ba764802
34 changed files with 388 additions and 507 deletions
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6
drivers/gpu/drm/i915/gem/i915_gem_userptr.c
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@@ -779,15 +779,11 @@ i915_gem_userptr_ioctl(struct drm_device *dev,
return -EFAULT;
if (args->flags & I915_USERPTR_READ_ONLY) {
struct i915_address_space *vm;
/*
* On almost all of the older hw, we cannot tell the GPU that
* a page is readonly.
*/
vm = rcu_dereference_protected(dev_priv->kernel_context->vm,
true); /* static vm */
if (!vm || !vm->has_read_only)
if (!dev_priv->gt.vm->has_read_only)
return -ENODEV;
}