From: Rob Clark <robdclark@xxxxxxxxxxxx>
Just for the purposes of testing. Write to it the # of objects to scan,
read back the # freed.
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_debugfs.c | 28 ++++++++++++++++++++++++++
drivers/gpu/drm/msm/msm_drv.h | 4 ++++
drivers/gpu/drm/msm/msm_gem_shrinker.c | 18 +++++++++++++++++
3 files changed, 50 insertions(+)
diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c
index d611cc8e54a4..7a2b53d35e6b 100644
--- a/drivers/gpu/drm/msm/msm_debugfs.c
+++ b/drivers/gpu/drm/msm/msm_debugfs.c
@@ -108,6 +108,31 @@ static const struct file_operations msm_gpu_fops = {
.release = msm_gpu_release,
};
+static unsigned long last_shrink_freed;
+
+static int
+shrink_get(void *data, u64 *val)
+{
+ *val = last_shrink_freed;
+
+ return 0;
+}
+
+static int
+shrink_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+
+ last_shrink_freed = msm_gem_shrinker_shrink(dev, val);
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(shrink_fops,
+ shrink_get, shrink_set,
+ "0x%08llx\n");
+
+
static int msm_gem_show(struct drm_device *dev, struct seq_file *m)
{
struct msm_drm_private *priv = dev->dev_private;
@@ -226,6 +251,9 @@ void msm_debugfs_init(struct drm_minor *minor)
debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
dev, &msm_gpu_fops);
+ debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root,
+ dev, &shrink_fops);
+
if (priv->kms && priv->kms->funcs->debugfs_init)
priv->kms->funcs->debugfs_init(priv->kms, minor);
}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 3352125ce428..b58c9d1cc5f1 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -296,6 +296,10 @@ bool msm_use_mmu(struct drm_device *dev);
int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
struct drm_file *file);
+#ifdef CONFIG_DEBUG_FS
+unsigned long msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan);
+#endif
+
void msm_gem_shrinker_init(struct drm_device *dev);
void msm_gem_shrinker_cleanup(struct drm_device *dev);
diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c
index 1187ecf9d647..0f1b29ee04a9 100644
--- a/drivers/gpu/drm/msm/msm_gem_shrinker.c
+++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c
@@ -145,6 +145,24 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
return (freed > 0) ? freed : SHRINK_STOP;
}
+#ifdef CONFIG_DEBUG_FS
+unsigned long
+msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan)
+{
+ struct msm_drm_private *priv = dev->dev_private;
+ struct shrink_control sc = {
+ .nr_to_scan = nr_to_scan,
+ };
+ int ret;
+
+ fs_reclaim_acquire(GFP_KERNEL);
+ ret = msm_gem_shrinker_scan(&priv->shrinker, &sc);
+ fs_reclaim_release(GFP_KERNEL);
+
+ return ret;
+}
+#endif
+
/* since we don't know any better, lets bail after a few
* and if necessary the shrinker will be invoked again.
* Seems better than unmapping *everything*
--
2.31.1
