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From: Thomas Zimmermann <tzimmermann@suse.de>
To: alexander.deucher@amd.com, christian.koenig@amd.com,
	airlied@linux.ie, daniel@ffwll.ch, bskeggs@redhat.com,
	ray.huang@amd.com, linux-graphics-maintainer@vmware.com,
	sroland@vmware.com, zackr@vmware.com, shashank.sharma@amd.com,
	sam@ravnborg.org, emil.velikov@collabora.com,
	Felix.Kuehling@amd.com, nirmoy.das@amd.com
Cc: nouveau@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org,
	Thomas Zimmermann <tzimmermann@suse.de>
Subject: [PATCH v3 1/7] drm/ttm: Don't override vm_ops callbacks, if set
Date: Fri, 16 Apr 2021 15:31:40 +0200
Message-ID: <20210416133146.24825-2-tzimmermann@suse.de> (raw)
In-Reply-To: <20210416133146.24825-1-tzimmermann@suse.de>

Drivers may want to set their own callbacks for a VM area. Only set
TTM's callbacks if the vm_ops field is clear.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index b31b18058965..bf4a213bc66c 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -534,7 +534,12 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_device *bdev,
 
 static void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma)
 {
-	vma->vm_ops = &ttm_bo_vm_ops;
+	/*
+	 * Drivers may want to override the vm_ops field. Otherwise we
+	 * use TTM's default callbacks.
+	 */
+	if (!vma->vm_ops)
+		vma->vm_ops = &ttm_bo_vm_ops;
 
 	/*
 	 * Note: We're transferring the bo reference to
-- 
2.31.1

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Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16 13:31 [PATCH v3 0/7] drm: Clean up mmap for TTM-based GEM drivers Thomas Zimmermann
2021-04-16 13:31 ` Thomas Zimmermann [this message]
2021-04-16 13:31 ` [PATCH v3 2/7] drm/amdgpu: Implement mmap as GEM object function Thomas Zimmermann
2021-04-16 13:31 ` [PATCH v3 3/7] drm/radeon: " Thomas Zimmermann
2021-04-16 13:31 ` [PATCH v3 4/7] drm/nouveau: " Thomas Zimmermann
2021-04-16 13:31 ` [PATCH v3 5/7] drm/vmwgfx: Inline ttm_bo_mmap() into vmwgfx driver Thomas Zimmermann
2021-04-16 13:46   ` Christian König
2021-04-16 13:51     ` Christian König
2021-04-20  7:51       ` Thomas Zimmermann
2021-04-20  8:51         ` Daniel Vetter
2021-04-20 20:22           ` Felix Kuehling
2021-04-20 20:53             ` Daniel Vetter
2021-04-21  7:01               ` Christian König
2021-04-21  9:12                 ` Daniel Vetter
2021-04-16 14:00     ` Thomas Zimmermann
2021-04-16 13:31 ` [PATCH v3 6/7] drm/vmwgfx: Inline vmw_verify_access() Thomas Zimmermann
2021-04-16 13:31 ` [PATCH v3 7/7] drm/ttm: Remove ttm_bo_mmap() and friends Thomas Zimmermann
2021-04-16 13:44 ` [PATCH v3 0/7] drm: Clean up mmap for TTM-based GEM drivers Christian König

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