drm/ttm: add reservation_object as argument to ttm_bo_init

This allows importing reservation objects from dma-bufs.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>

10 files changed, 28 insertions, 14 deletions

diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
index c65d432f42c4..08f82eae6939 100644
--- a/drivers/gpu/drm/ast/ast_ttm.c
+++ b/drivers/gpu/drm/ast/ast_ttm.c
@@ -339,7 +339,7 @@ int ast_bo_create(struct drm_device *dev, int size, int align,
         ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
                           ttm_bo_type_device, &astbo->placement,
                           align >> PAGE_SHIFT, false, NULL, acc_size,
-                          NULL, ast_bo_ttm_destroy);
+                          NULL, NULL, ast_bo_ttm_destroy);
         if (ret)
                 return ret;
 
diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
index 324f5a09a0a1..66286ff518d4 100644
--- a/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -377,7 +377,7 @@ static int bochs_bo_create(struct drm_device *dev, int size, int align,
         ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
                           ttm_bo_type_device, &bochsbo->placement,
                           align >> PAGE_SHIFT, false, NULL, acc_size,
-                          NULL, bochs_bo_ttm_destroy);
+                          NULL, NULL, bochs_bo_ttm_destroy);
         if (ret)
                 return ret;
 
diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c
index d3c615f9b183..dfffd528517a 100644
--- a/drivers/gpu/drm/cirrus/cirrus_ttm.c
+++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c
@@ -343,7 +343,7 @@ int cirrus_bo_create(struct drm_device *dev, int size, int align,
         ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
                           ttm_bo_type_device, &cirrusbo->placement,
                           align >> PAGE_SHIFT, false, NULL, acc_size,
-                          NULL, cirrus_bo_ttm_destroy);
+                          NULL, NULL, cirrus_bo_ttm_destroy);
         if (ret)
                 return ret;
 
diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
index 8ac70626df6c..d16964ea0ed4 100644
--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
+++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
@@ -339,7 +339,7 @@ int mgag200_bo_create(struct drm_device *dev, int size, int align,
         ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
                           ttm_bo_type_device, &mgabo->placement,
                           align >> PAGE_SHIFT, false, NULL, acc_size,
-                          NULL, mgag200_bo_ttm_destroy);
+                          NULL, NULL, mgag200_bo_ttm_destroy);
         if (ret)
                 return ret;
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 049f5de90928..7034cacaa4a1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -230,7 +230,7 @@ nouveau_bo_new(struct drm_device *dev, int size, int align,
         ret = ttm_bo_init(&drm->ttm.bdev, &nvbo->bo, size,
                           type, &nvbo->placement,
                           align >> PAGE_SHIFT, false, NULL, acc_size, sg,
-                          nouveau_bo_del_ttm);
+                          NULL, nouveau_bo_del_ttm);
         if (ret) {
                 /* ttm will call nouveau_bo_del_ttm if it fails.. */
                 return ret;
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 69c104c3240f..cdeaf08fdc74 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -110,7 +110,7 @@ int qxl_bo_create(struct qxl_device *qdev,
 
         r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
                         &bo->placement, 0, !kernel, NULL, size,
-                        NULL, &qxl_ttm_bo_destroy);
+                        NULL, NULL, &qxl_ttm_bo_destroy);
         if (unlikely(r != 0)) {
                 if (r != -ERESTARTSYS)
                         dev_err(qdev->dev,
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 8abee5fa93bd..0e82f0223fd4 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -216,7 +216,7 @@ int radeon_bo_create(struct radeon_device *rdev,
         down_read(&rdev->pm.mclk_lock);
         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
                         &bo->placement, page_align, !kernel, NULL,
-                        acc_size, sg, &radeon_ttm_bo_destroy);
+                        acc_size, sg, NULL, &radeon_ttm_bo_destroy);
         up_read(&rdev->pm.mclk_lock);
         if (unlikely(r != 0)) {
                 return r;
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index a11969acfea5..8f5cec67c47d 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1068,6 +1068,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
                 struct file *persistent_swap_storage,
                 size_t acc_size,
                 struct sg_table *sg,
+                struct reservation_object *resv,
                 void (*destroy) (struct ttm_buffer_object *))
 {
         int ret = 0;
@@ -1121,8 +1122,13 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
         bo->persistent_swap_storage = persistent_swap_storage;
         bo->acc_size = acc_size;
         bo->sg = sg;
-        bo->resv = &bo->ttm_resv;
-        reservation_object_init(bo->resv);
+        if (resv) {
+                bo->resv = resv;
+                lockdep_assert_held(&bo->resv->lock.base);
+        } else {
+                bo->resv = &bo->ttm_resv;
+                reservation_object_init(&bo->ttm_resv);
+        }
         atomic_inc(&bo->glob->bo_count);
         drm_vma_node_reset(&bo->vma_node);
 
@@ -1135,13 +1141,19 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
                 ret = drm_vma_offset_add(&bdev->vma_manager, &bo->vma_node,
                                          bo->mem.num_pages);
 
-        locked = ww_mutex_trylock(&bo->resv->lock);
-        WARN_ON(!locked);
+        /* passed reservation objects should already be locked,
+         * since otherwise lockdep will be angered in radeon.
+         */
+        if (!resv) {
+                locked = ww_mutex_trylock(&bo->resv->lock);
+                WARN_ON(!locked);
+        }
 
         if (likely(!ret))
                 ret = ttm_bo_validate(bo, placement, interruptible, false);
 
-        ttm_bo_unreserve(bo);
+        if (!resv)
+                ttm_bo_unreserve(bo);
 
         if (unlikely(ret))
                 ttm_bo_unref(&bo);
@@ -1199,7 +1211,7 @@ int ttm_bo_create(struct ttm_bo_device *bdev,
         acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
         ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
                           interruptible, persistent_swap_storage, acc_size,
-                          NULL, NULL);
+                          NULL, NULL, NULL);
         if (likely(ret == 0))
                 *p_bo = bo;
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index 26584316cb78..026de7cea0f6 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -430,7 +430,7 @@ int vmw_dmabuf_init(struct vmw_private *dev_priv,
         ret = ttm_bo_init(bdev, &vmw_bo->base, size,
                           ttm_bo_type_device, placement,
                           0, interruptible,
-                          NULL, acc_size, NULL, bo_free);
+                          NULL, acc_size, NULL, NULL, bo_free);
         return ret;
 }
 
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 70b44917c368..0ccf7f267ff9 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -460,6 +460,7 @@ size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
  * point to the shmem object backing a GEM object if TTM is used to back a
  * GEM user interface.
  * @acc_size: Accounted size for this object.
+ * @resv: Pointer to a reservation_object, or NULL to let ttm allocate one.
  * @destroy: Destroy function. Use NULL for kfree().
  *
  * This function initializes a pre-allocated struct ttm_buffer_object.
@@ -487,6 +488,7 @@ extern int ttm_bo_init(struct ttm_bo_device *bdev,
                         struct file *persistent_swap_storage,
                         size_t acc_size,
                         struct sg_table *sg,
+                        struct reservation_object *resv,
                         void (*destroy) (struct ttm_buffer_object *));
 
 /**