git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From 9aa5f00f839d261bfef937425e9c2e929c0db118 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Ma=C3=ADra=20Canal?= <mcanal@igalia.com>
   3 Date: Mon, 23 Sep 2024 10:55:08 -0300
   4 Subject: [PATCH] drm/gem: Create a drm_gem_object_init_with_mnt() function
   5 MIME-Version: 1.0
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   8
   9 Commit 0992b2541e1cd9580c2e70fab7a78558de054bae upstream
  10
  11 For some applications, such as applications that uses huge pages, we might
  12 want to have a different mountpoint, for which we pass mount flags that
  13 better match our usecase.
  14
  15 Therefore, create a new function `drm_gem_object_init_with_mnt()` that
  16 allow us to define the tmpfs mountpoint where the GEM object will be
  17 created. If this parameter is NULL, then we fallback to `shmem_file_setup()`.
  18
  19 Signed-off-by: Maíra Canal <mcanal@igalia.com>
  20 Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
  21 Link: https://patchwork.freedesktop.org/patch/msgid/20240923141348.2422499-5-mcanal@igalia.com
  22 ---
  23  drivers/gpu/drm/drm_gem.c | 34 ++++++++++++++++++++++++++++++----
  24  include/drm/drm_gem.h     |  3 +++
  25  2 files changed, 33 insertions(+), 4 deletions(-)
  26
  27 --- a/drivers/gpu/drm/drm_gem.c
  28 +++ b/drivers/gpu/drm/drm_gem.c
  29 @@ -114,22 +114,32 @@ drm_gem_init(struct drm_device *dev)
  30  }
  31
  32  /**
  33 - * drm_gem_object_init - initialize an allocated shmem-backed GEM object
  34 + * drm_gem_object_init_with_mnt - initialize an allocated shmem-backed GEM
  35 + * object in a given shmfs mountpoint
  36 + *
  37   * @dev: drm_device the object should be initialized for
  38   * @obj: drm_gem_object to initialize
  39   * @size: object size
  40 + * @gemfs: tmpfs mount where the GEM object will be created. If NULL, use
  41 + * the usual tmpfs mountpoint (`shm_mnt`).
  42   *
  43   * Initialize an already allocated GEM object of the specified size with
  44   * shmfs backing store.
  45   */
  46 -int drm_gem_object_init(struct drm_device *dev,
  47 -                       struct drm_gem_object *obj, size_t size)
  48 +int drm_gem_object_init_with_mnt(struct drm_device *dev,
  49 +                                struct drm_gem_object *obj, size_t size,
  50 +                                struct vfsmount *gemfs)
  51  {
  52         struct file *filp;
  53
  54         drm_gem_private_object_init(dev, obj, size);
  55
  56 -       filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
  57 +       if (gemfs)
  58 +               filp = shmem_file_setup_with_mnt(gemfs, "drm mm object", size,
  59 +                                                VM_NORESERVE);
  60 +       else
  61 +               filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
  62 +
  63         if (IS_ERR(filp))
  64                 return PTR_ERR(filp);
  65
  66 @@ -137,6 +147,22 @@ int drm_gem_object_init(struct drm_devic
  67
  68         return 0;
  69  }
  70 +EXPORT_SYMBOL(drm_gem_object_init_with_mnt);
  71 +
  72 +/**
  73 + * drm_gem_object_init - initialize an allocated shmem-backed GEM object
  74 + * @dev: drm_device the object should be initialized for
  75 + * @obj: drm_gem_object to initialize
  76 + * @size: object size
  77 + *
  78 + * Initialize an already allocated GEM object of the specified size with
  79 + * shmfs backing store.
  80 + */
  81 +int drm_gem_object_init(struct drm_device *dev, struct drm_gem_object *obj,
  82 +                       size_t size)
  83 +{
  84 +       return drm_gem_object_init_with_mnt(dev, obj, size, NULL);
  85 +}
  86  EXPORT_SYMBOL(drm_gem_object_init);
  87
  88  /**
  89 --- a/include/drm/drm_gem.h
  90 +++ b/include/drm/drm_gem.h
  91 @@ -473,6 +473,9 @@ void drm_gem_object_release(struct drm_g
  92  void drm_gem_object_free(struct kref *kref);
  93  int drm_gem_object_init(struct drm_device *dev,
  94                         struct drm_gem_object *obj, size_t size);
  95 +int drm_gem_object_init_with_mnt(struct drm_device *dev,
  96 +                                struct drm_gem_object *obj, size_t size,
  97 +                                struct vfsmount *gemfs);
  98  void drm_gem_private_object_init(struct drm_device *dev,
  99                                  struct drm_gem_object *obj, size_t size);
 100  void drm_gem_private_object_fini(struct drm_gem_object *obj);