[PATCH 1/2] drm/amdgpu: link all gtt when binding them V2

[Chunming Zhou]

V2:
spin lock instead of mutex for gtt list

Change-Id: I5dc3f9003e706d3a142aadb559bd85f6e0f2a03f
Signed-off-by: Chunming Zhou <david1.z...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        | 4 ++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    | 9 +++++++++
 3 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index b17916d..6f0af25 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -2117,6 +2117,10 @@ struct amdgpu_device {
        /* link all shadow bo */
        struct list_head                shadow_list;
        struct mutex                    shadow_list_lock;
+       /* link all gtt */
+       spinlock_t                      gtt_list_lock;
+       struct list_head                gtt_list;
+
 };
 
 bool amdgpu_device_is_px(struct drm_device *dev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 9a6a1a9..a968fc6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1591,6 +1591,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
        INIT_LIST_HEAD(&adev->shadow_list);
        mutex_init(&adev->shadow_list_lock);
 
+       INIT_LIST_HEAD(&adev->gtt_list);
+       spin_lock_init(&adev->gtt_list_lock);
+
        adev->rmmio_base = pci_resource_start(adev->pdev, 5);
        adev->rmmio_size = pci_resource_len(adev->pdev, 5);
        adev->rmmio = ioremap(adev->rmmio_base, adev->rmmio_size);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 2ba3c8d..0c561c6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -521,6 +521,7 @@ struct amdgpu_ttm_tt {
        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)
@@ -667,6 +668,9 @@ static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
                          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;
 }
 
@@ -681,6 +685,10 @@ static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
        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;
 }
 
@@ -717,6 +725,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct 
ttm_bo_device *bdev,
                kfree(gtt);
                return NULL;
        }
+       INIT_LIST_HEAD(&gtt->list);
        return &gtt->ttm.ttm;
 }
 
-- 
1.9.1

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