[Intel-gfx] [RFC PATCH 42/42] HAX drm/i915/lmem: default userspace allocations to LMEM

[Chris Wilson]

Quoting Matthew Auld (2019-02-14 14:57:40)
> Hack patch to default all userspace allocations to LMEM. Useful for
> testing purposes.
> 
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_gem.c | 45 +++++++++++++++++++++++++++++++--
>  1 file changed, 43 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 3c86909d55b9..bd857f477ef9 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -641,7 +641,8 @@ i915_gem_create(struct drm_file *file,
>                 u32 *handle_p)
>  {
>         struct drm_i915_gem_object *obj;
> -       int ret;
> +       intel_wakeref_t wakeref;
> +       int ret = 0;
>         u32 handle;
>  
>         size = roundup(size, PAGE_SIZE);
> @@ -649,10 +650,50 @@ i915_gem_create(struct drm_file *file,
>                 return -EINVAL;
>  
>         /* Allocate the new object */
> -       obj = i915_gem_object_create(dev_priv, size);
> +       if (HAS_LMEM(dev_priv))
> +               obj = i915_gem_object_create_lmem(dev_priv, size, 0);
> +       else
> +               obj = i915_gem_object_create(dev_priv, size);
>         if (IS_ERR(obj))
>                 return PTR_ERR(obj);
>  
> +       if (i915_gem_object_is_lmem(obj)) {
> +               struct i915_gem_context *ctx;
> +
> +               /* XXX: we should prob use the blitter context for this? */

Or the kernel_context which is setup for emitting without taking
struct_mutex...
-Chris