linux-kernel - [RFC PATCH 5/6] drm/amdgpu: Add cgroups implementation

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Message-ID: <20240627154754.74828-6-maarten.lankhorst@linux.intel.com>
Date: Thu, 27 Jun 2024 17:47:24 +0200
From: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
To: intel-xe@...ts.freedesktop.org,
	linux-kernel@...r.kernel.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>,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	"Pan, Xinhui" <Xinhui.Pan@....com>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Cc: Friedrich Vock <friedrich.vock@....de>,
	cgroups@...r.kernel.org,
	linux-mm@...ck.org,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	amd-gfx@...ts.freedesktop.org
Subject: [RFC PATCH 5/6] drm/amdgpu: Add cgroups implementation

Similar to xe, enable some simple management of VRAM only.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h          | 2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c      | 6 ++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 ++++++
 3 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f87d53e183c3..9ec55f05bfd5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -43,6 +43,7 @@
 #include "amdgpu_ctx.h"
 
 #include <linux/atomic.h>
+#include <linux/cgroup_drm.h>
 #include <linux/wait.h>
 #include <linux/list.h>
 #include <linux/kref.h>
@@ -836,6 +837,7 @@ struct amdgpu_device {
 	struct device			*dev;
 	struct pci_dev			*pdev;
 	struct drm_device		ddev;
+	struct drmcgroup_device		cg;
 
 #ifdef CONFIG_DRM_AMD_ACP
 	struct amdgpu_acp		acp;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index e785f128411d..1afe28016d40 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1856,6 +1856,12 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 		return r;
 	}
 
+	r = drmmcg_register_device(adev_to_drm(adev), &adev->cg);
+	if (r) {
+		DRM_ERROR("Failed initializing cgroup allocator.\n");
+		return r;
+	}
+
 	/* Change the size here instead of the init above so only lpfn is affected */
 	amdgpu_ttm_set_buffer_funcs_status(adev, false);
 #ifdef CONFIG_64BIT
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 6c30eceec896..b207af0bff3a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -895,6 +895,12 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
 		DRM_INFO("Setup dummy vram mgr\n");
 	}
 
+	adev->cg.regions[0].size = adev->gmc.real_vram_size;
+	adev->cg.regions[0].name = "vram";
+	adev->cg.num_regions++;
+	man->cgdev = &adev->cg;
+	man->cgidx = 0;
+
 	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
 	ttm_resource_manager_set_used(man, true);
 	return 0;
-- 
2.45.2