linux-kernel - [PATCH] drm/etnaviv: Add fdinfo support for memory stats

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Message-ID: <20241121092409.3859592-1-christian.gmeiner@gmail.com>
Date: Thu, 21 Nov 2024 10:24:08 +0100
From: Christian Gmeiner <christian.gmeiner@...il.com>
To: Lucas Stach <l.stach@...gutronix.de>,
	Russell King <linux+etnaviv@...linux.org.uk>,
	Christian Gmeiner <christian.gmeiner@...il.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
Cc: kernel-dev@...lia.com,
	tursulin@...lia.com,
	Christian Gmeiner <cgmeiner@...lia.com>,
	etnaviv@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/etnaviv: Add fdinfo support for memory stats

From: Christian Gmeiner <cgmeiner@...lia.com>

Use the new helper to export stats about memory usage.

Signed-off-by: Christian Gmeiner <cgmeiner@...lia.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_drv.c | 12 +++++++++++-
 drivers/gpu/drm/etnaviv/etnaviv_gem.c | 12 ++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 6500f3999c5f..35f47dd6367f 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -488,7 +488,16 @@ static const struct drm_ioctl_desc etnaviv_ioctls[] = {
 	ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_RENDER_ALLOW),
 };
 
-DEFINE_DRM_GEM_FOPS(fops);
+static void etnaviv_show_fdinfo(struct drm_printer *p, struct drm_file *file)
+{
+	drm_show_memory_stats(p, file);
+}
+
+static const struct file_operations fops = {
+	.owner = THIS_MODULE,
+	DRM_GEM_FOPS,
+	.show_fdinfo = drm_show_fdinfo,
+};
 
 static const struct drm_driver etnaviv_drm_driver = {
 	.driver_features    = DRIVER_GEM | DRIVER_RENDER,
@@ -498,6 +507,7 @@ static const struct drm_driver etnaviv_drm_driver = {
 #ifdef CONFIG_DEBUG_FS
 	.debugfs_init       = etnaviv_debugfs_init,
 #endif
+	.show_fdinfo        = etnaviv_show_fdinfo,
 	.ioctls             = etnaviv_ioctls,
 	.num_ioctls         = DRM_ETNAVIV_NUM_IOCTLS,
 	.fops               = &fops,
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
index 5c0c9d4e3be1..e81c261b0017 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -527,6 +527,17 @@ void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
 	mutex_unlock(&priv->gem_lock);
 }
 
+static enum drm_gem_object_status etnaviv_gem_status(struct drm_gem_object *obj)
+{
+	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+	enum drm_gem_object_status status = 0;
+
+	if (etnaviv_obj->pages)
+		status |= DRM_GEM_OBJECT_RESIDENT;
+
+	return status;
+}
+
 static const struct vm_operations_struct vm_ops = {
 	.fault = etnaviv_gem_fault,
 	.open = drm_gem_vm_open,
@@ -540,6 +551,7 @@ static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = {
 	.get_sg_table = etnaviv_gem_prime_get_sg_table,
 	.vmap = etnaviv_gem_prime_vmap,
 	.mmap = etnaviv_gem_mmap,
+	.status = etnaviv_gem_status,
 	.vm_ops = &vm_ops,
 };
 
-- 
2.47.0