[PATCH 3/7] drm/i915/gem: Unify user object creation

[Matthew Auld]

On Thu, 15 Jul 2021 at 23:39, Jason Ekstrand <jason at jlekstrand.net> wrote:
>
> Instead of hand-rolling the same three calls in each function, pull them
> into an i915_gem_object_create_user helper.  Apart from re-ordering of
> the placements array ENOMEM check, the only functional change here
> should be that i915_gem_dumb_create now calls i915_gem_flush_free_objects
> which it probably should have been calling all along.
>
> Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_create.c | 106 +++++++++------------
>  1 file changed, 43 insertions(+), 63 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> index 391c8c4a12172..69bf9ec777642 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> @@ -11,13 +11,14 @@
>  #include "i915_trace.h"
>  #include "i915_user_extensions.h"
>
> -static u32 object_max_page_size(struct drm_i915_gem_object *obj)
> +static u32 object_max_page_size(struct intel_memory_region **placements,
> +                               unsigned int n_placements)
>  {
>         u32 max_page_size = 0;
>         int i;
>
> -       for (i = 0; i < obj->mm.n_placements; i++) {
> -               struct intel_memory_region *mr = obj->mm.placements[i];
> +       for (i = 0; i < n_placements; i++) {
> +               struct intel_memory_region *mr = placements[i];
>
>                 GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
>                 max_page_size = max_t(u32, max_page_size, mr->min_page_size);
> @@ -81,22 +82,35 @@ static int i915_gem_publish(struct drm_i915_gem_object *obj,
>         return 0;
>  }
>
> -static int
> -i915_gem_setup(struct drm_i915_gem_object *obj, u64 size)
> +static struct drm_i915_gem_object *
> +i915_gem_object_create_user(struct drm_i915_private *i915, u64 size,

create_user sounds nice.

> +                           struct intel_memory_region **placements,
> +                           unsigned int n_placements)
>  {
> -       struct intel_memory_region *mr = obj->mm.placements[0];
> +       struct intel_memory_region *mr = placements[0];
> +       struct drm_i915_gem_object *obj;
>         unsigned int flags;
>         int ret;
>
> -       size = round_up(size, object_max_page_size(obj));
> +       i915_gem_flush_free_objects(i915);

Needs to be a separate patch.

> +
> +       obj = i915_gem_object_alloc();
> +       if (!obj)
> +               return ERR_PTR(-ENOMEM);

Should move this way down, so we don't accidently leak it.