Allow msm_kms devices to register a hook to check blob count and blob size limitations before a new blob is created.
Signed-off-by: Steve Cohen cohens@codeaurora.org --- drivers/gpu/drm/msm/msm_drv.c | 25 +++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_kms.h | 1 + 2 files changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index c84f0a8..d0b0419 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -680,6 +680,30 @@ static void msm_disable_vblank(struct drm_device *dev, unsigned int pipe) vblank_ctrl_queue_work(priv, pipe, false); }
+static int msm_createblob_check (struct drm_device *dev, size_t length, + struct drm_file *file_priv) +{ + struct msm_drm_private *priv = dev->dev_private; + struct msm_kms *kms = priv->kms; + unsigned int count = 0; + struct drm_property_blob *blob; + + if (!kms) + return -EINVAL; + + if (!kms->funcs->createblob_check) + return 0; + + mutex_lock(&dev->mode_config.blob_lock); + list_for_each_entry(blob, &file_priv->blobs, head_file) { + if (count < UINT_MAX) + count++; + } + mutex_unlock(&dev->mode_config.blob_lock); + + return kms->funcs->createblob_check(count, length); +} + /* * DRM ioctls: */ @@ -1011,6 +1035,7 @@ static struct drm_driver msm_driver = { .gem_prime_vmap = msm_gem_prime_vmap, .gem_prime_vunmap = msm_gem_prime_vunmap, .gem_prime_mmap = msm_gem_prime_mmap, + .createblob_check = msm_createblob_check, #ifdef CONFIG_DEBUG_FS .debugfs_init = msm_debugfs_init, #endif diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index 1cbef6b..8a7e581 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -126,6 +126,7 @@ struct msm_kms_funcs { /* debugfs: */ int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor); #endif + int (*createblob_check)(unsigned int count, size_t length); };
struct msm_kms;