[PATCH 09/10] drm/i915: move vma slab to direct module init/exit

[Jason Ekstrand]

On Fri, Jul 23, 2021 at 2:29 PM Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
>
> With the global kmem_cache shrink infrastructure gone there's nothing
> special and we can convert them over.
>
> I'm doing this split up into each patch because there's quite a bit of
> noise with removing the static global.slab_vmas to just a
> slab_vmas.
>
> We have to keep i915_drv.h include in i915_globals otherwise there's
> nothing anymore that pulls in GEM_BUG_ON.
>
> Cc: Jason Ekstrand <jason at jlekstrand.net>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_globals.c |  3 +--
>  drivers/gpu/drm/i915/i915_globals.h |  3 ---
>  drivers/gpu/drm/i915/i915_pci.c     |  2 ++
>  drivers/gpu/drm/i915/i915_vma.c     | 25 ++++++++-----------------
>  drivers/gpu/drm/i915/i915_vma.h     |  3 +++
>  5 files changed, 14 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_globals.c b/drivers/gpu/drm/i915/i915_globals.c
> index 8923589057ab..04979789e7be 100644
> --- a/drivers/gpu/drm/i915/i915_globals.c
> +++ b/drivers/gpu/drm/i915/i915_globals.c
> @@ -8,7 +8,7 @@
>  #include <linux/workqueue.h>
>
>  #include "i915_globals.h"
> -#include "i915_vma.h"
> +#include "i915_drv.h"
>
>  static LIST_HEAD(globals);
>
> @@ -28,7 +28,6 @@ static void __i915_globals_cleanup(void)
>  }
>
>  static __initconst int (* const initfn[])(void) = {
> -       i915_global_vma_init,
>  };
>
>  int __init i915_globals_init(void)
> diff --git a/drivers/gpu/drm/i915/i915_globals.h b/drivers/gpu/drm/i915/i915_globals.h
> index 7a57bce1da05..57d2998bba45 100644
> --- a/drivers/gpu/drm/i915/i915_globals.h
> +++ b/drivers/gpu/drm/i915/i915_globals.h
> @@ -22,7 +22,4 @@ void i915_global_register(struct i915_global *global);
>  int i915_globals_init(void);
>  void i915_globals_exit(void);
>
> -/* constructors */
> -int i915_global_vma_init(void);
> -
>  #endif /* _I915_GLOBALS_H_ */
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index a44318519977..0affcf33a211 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -40,6 +40,7 @@
>  #include "i915_globals.h"
>  #include "i915_selftest.h"
>  #include "i915_scheduler.h"
> +#include "i915_vma.h"
>
>  #define PLATFORM(x) .platform = (x)
>  #define GEN(x) \
> @@ -1306,6 +1307,7 @@ static const struct {
>         { i915_objects_module_init, i915_objects_module_exit },
>         { i915_request_module_init, i915_request_module_exit },
>         { i915_scheduler_module_init, i915_scheduler_module_exit },
> +       { i915_vma_module_init, i915_vma_module_exit },
>         { i915_globals_init, i915_globals_exit },
>         { i915_mock_selftests, NULL },
>         { i915_pmu_init, i915_pmu_exit },
> diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
> index 09a7c47926f7..d094e2016b93 100644
> --- a/drivers/gpu/drm/i915/i915_vma.c
> +++ b/drivers/gpu/drm/i915/i915_vma.c
> @@ -34,24 +34,20 @@
>  #include "gt/intel_gt_requests.h"
>
>  #include "i915_drv.h"
> -#include "i915_globals.h"
>  #include "i915_sw_fence_work.h"
>  #include "i915_trace.h"
>  #include "i915_vma.h"
>
> -static struct i915_global_vma {
> -       struct i915_global base;
> -       struct kmem_cache *slab_vmas;
> -} global;
> +struct kmem_cache *slab_vmas;

static.  With that,

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

>
>  struct i915_vma *i915_vma_alloc(void)
>  {
> -       return kmem_cache_zalloc(global.slab_vmas, GFP_KERNEL);
> +       return kmem_cache_zalloc(slab_vmas, GFP_KERNEL);
>  }
>
>  void i915_vma_free(struct i915_vma *vma)
>  {
> -       return kmem_cache_free(global.slab_vmas, vma);
> +       return kmem_cache_free(slab_vmas, vma);
>  }
>
>  #if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM)
> @@ -1414,21 +1410,16 @@ void i915_vma_make_purgeable(struct i915_vma *vma)
>  #include "selftests/i915_vma.c"
>  #endif
>
> -static void i915_global_vma_exit(void)
> +void i915_vma_module_exit(void)
>  {
> -       kmem_cache_destroy(global.slab_vmas);
> +       kmem_cache_destroy(slab_vmas);
>  }
>
> -static struct i915_global_vma global = { {
> -       .exit = i915_global_vma_exit,
> -} };
> -
> -int __init i915_global_vma_init(void)
> +int __init i915_vma_module_init(void)
>  {
> -       global.slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
> -       if (!global.slab_vmas)
> +       slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
> +       if (!slab_vmas)
>                 return -ENOMEM;
>
> -       i915_global_register(&global.base);
>         return 0;
>  }
> diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
> index eca452a9851f..ed69f66c7ab0 100644
> --- a/drivers/gpu/drm/i915/i915_vma.h
> +++ b/drivers/gpu/drm/i915/i915_vma.h
> @@ -426,4 +426,7 @@ static inline int i915_vma_sync(struct i915_vma *vma)
>         return i915_active_wait(&vma->active);
>  }
>
> +void i915_vma_module_exit(void);
> +int i915_vma_module_init(void);
> +
>  #endif
> --
> 2.32.0
>