linux-kernel - [PATCH v2 4/7] drm/xe: Implement cgroup for vram

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Message-ID: <20241204134410.1161769-5-dev@lankhorst.se>
Date: Wed,  4 Dec 2024 14:44:04 +0100
From: Maarten Lankhorst <dev@...khorst.se>
To: linux-kernel@...r.kernel.org,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	Tejun Heo <tj@...nel.org>,
	Zefan Li <lizefan.x@...edance.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Friedrich Vock <friedrich.vock@....de>,
	Maxime Ripard <mripard@...nel.org>
Cc: cgroups@...r.kernel.org,
	linux-mm@...ck.org,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maarten Lankhorst <dev@...khorst.se>
Subject: [PATCH v2 4/7] drm/xe: Implement cgroup for vram

Add vram based cgroup eviction to Xe.
Most hardware with VRAM uses TTM for its management, and can be
similarly trivially enabled.

Co-developed-by: Maxime Ripard <mripard@...nel.org>
Signed-off-by: Maxime Ripard <mripard@...nel.org>
Signed-off-by: Maarten Lankhorst <dev@...khorst.se>
---
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index c95728c45ea48..f4a16e5fa7700 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -5,6 +5,7 @@
  */
 
 #include <drm/drm_managed.h>
+#include <drm/drm_drv.h>
 
 #include <drm/ttm/ttm_placement.h>
 #include <drm/ttm/ttm_range_manager.h>
@@ -311,6 +312,13 @@ int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
 	struct ttm_resource_manager *man = &mgr->manager;
 	int err;
 
+	if (mem_type != XE_PL_STOLEN) {
+		const char *name = mem_type == XE_PL_VRAM0 ? "vram0" : "vram1";
+		man->cg = drmm_cgroup_register_region(&xe->drm, name, size);
+		if (IS_ERR(man->cg))
+			return PTR_ERR(man->cg);
+	}
+
 	man->func = &xe_ttm_vram_mgr_func;
 	mgr->mem_type = mem_type;
 	mutex_init(&mgr->lock);
-- 
2.43.0