commit 5c1354bd30c118326236e13cfdc49db03d2b5855
author Chunming Zhou <David1.Zhou@amd.com> Tue Aug 30 16:13:10 2016 +0800
committer Alex Deucher <alexander.deucher@amd.com> Wed Aug 31 15:21:12 2016 -0400
tree cbcbcabc509367914f3224167c6aa2fa12e5b487
parent 78fbb6859b739f7f67c820ab8c9e7a25add977b5

drm/amdgpu: link all gtt when binding them V2

V2:
spin lock instead of mutex for gtt list

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 5447973..26ca3dd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -520,6 +520,7 @@
 	spinlock_t              guptasklock;
 	struct list_head        guptasks;
 	atomic_t		mmu_invalidations;
+	struct list_head        list;
 };
 
 int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
@@ -666,6 +667,9 @@
 			  ttm->num_pages, (unsigned)gtt->offset);
 		return r;
 	}
+	spin_lock(&gtt->adev->gtt_list_lock);
+	list_add_tail(&gtt->list, &gtt->adev->gtt_list);
+	spin_unlock(&gtt->adev->gtt_list_lock);
 	return 0;
 }
 
@@ -680,6 +684,10 @@
 	if (gtt->userptr)
 		amdgpu_ttm_tt_unpin_userptr(ttm);
 
+	spin_lock(&gtt->adev->gtt_list_lock);
+	list_del_init(&gtt->list);
+	spin_unlock(&gtt->adev->gtt_list_lock);
+
 	return 0;
 }
 
@@ -716,6 +724,7 @@
 		kfree(gtt);
 		return NULL;
 	}
+	INIT_LIST_HEAD(&gtt->list);
 	return &gtt->ttm.ttm;
 }