drm: Extract <drm/drm_gem.h>

v2: Don't forget git add, noticed by David.

Cc: David Herrmann <dh.herrmann@gmail.com>

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Acked-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 183 insertions, 0 deletions

diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
new file mode 100644
index 000000000000..1e6ae1458f7a
--- /dev/null
+++ b/include/drm/drm_gem.h
@@ -0,0 +1,183 @@
+#ifndef __DRM_GEM_H__
+#define __DRM_GEM_H__
+
+/*
+ * GEM Graphics Execution Manager Driver Interfaces
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * All rights reserved.
+ * Copyright © 2014 Intel Corporation
+ *   Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ * Author: Rickard E. (Rik) Faith <faith@valinux.com>
+ * Author: Gareth Hughes <gareth@valinux.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * This structure defines the drm_mm memory object, which will be used by the
+ * DRM for its buffer objects.
+ */
+struct drm_gem_object {
+        /** Reference count of this object */
+        struct kref refcount;
+
+        /**
+         * handle_count - gem file_priv handle count of this object
+         *
+         * Each handle also holds a reference. Note that when the handle_count
+         * drops to 0 any global names (e.g. the id in the flink namespace) will
+         * be cleared.
+         *
+         * Protected by dev->object_name_lock.
+         * */
+        unsigned handle_count;
+
+        /** Related drm device */
+        struct drm_device *dev;
+
+        /** File representing the shmem storage */
+        struct file *filp;
+
+        /* Mapping info for this object */
+        struct drm_vma_offset_node vma_node;
+
+        /**
+         * Size of the object, in bytes.  Immutable over the object's
+         * lifetime.
+         */
+        size_t size;
+
+        /**
+         * Global name for this object, starts at 1. 0 means unnamed.
+         * Access is covered by the object_name_lock in the related drm_device
+         */
+        int name;
+
+        /**
+         * Memory domains. These monitor which caches contain read/write data
+         * related to the object. When transitioning from one set of domains
+         * to another, the driver is called to ensure that caches are suitably
+         * flushed and invalidated
+         */
+        uint32_t read_domains;
+        uint32_t write_domain;
+
+        /**
+         * While validating an exec operation, the
+         * new read/write domain values are computed here.
+         * They will be transferred to the above values
+         * at the point that any cache flushing occurs
+         */
+        uint32_t pending_read_domains;
+        uint32_t pending_write_domain;
+
+        /**
+         * dma_buf - dma buf associated with this GEM object
+         *
+         * Pointer to the dma-buf associated with this gem object (either
+         * through importing or exporting). We break the resulting reference
+         * loop when the last gem handle for this object is released.
+         *
+         * Protected by obj->object_name_lock
+         */
+        struct dma_buf *dma_buf;
+
+        /**
+         * import_attach - dma buf attachment backing this object
+         *
+         * Any foreign dma_buf imported as a gem object has this set to the
+         * attachment point for the device. This is invariant over the lifetime
+         * of a gem object.
+         *
+         * The driver's ->gem_free_object callback is responsible for cleaning
+         * up the dma_buf attachment and references acquired at import time.
+         *
+         * Note that the drm gem/prime core does not depend upon drivers setting
+         * this field any more. So for drivers where this doesn't make sense
+         * (e.g. virtual devices or a displaylink behind an usb bus) they can
+         * simply leave it as NULL.
+         */
+        struct dma_buf_attachment *import_attach;
+};
+
+void drm_gem_object_release(struct drm_gem_object *obj);
+void drm_gem_object_free(struct kref *kref);
+int drm_gem_object_init(struct drm_device *dev,
+                        struct drm_gem_object *obj, size_t size);
+void drm_gem_private_object_init(struct drm_device *dev,
+                                 struct drm_gem_object *obj, size_t size);
+void drm_gem_vm_open(struct vm_area_struct *vma);
+void drm_gem_vm_close(struct vm_area_struct *vma);
+int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
+                     struct vm_area_struct *vma);
+int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+
+static inline void
+drm_gem_object_reference(struct drm_gem_object *obj)
+{
+        kref_get(&obj->refcount);
+}
+
+static inline void
+drm_gem_object_unreference(struct drm_gem_object *obj)
+{
+        if (obj != NULL)
+                kref_put(&obj->refcount, drm_gem_object_free);
+}
+
+static inline void
+drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
+{
+        if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
+                struct drm_device *dev = obj->dev;
+
+                mutex_lock(&dev->struct_mutex);
+                if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
+                        drm_gem_object_free(&obj->refcount);
+                mutex_unlock(&dev->struct_mutex);
+        }
+}
+
+int drm_gem_handle_create(struct drm_file *file_priv,
+                          struct drm_gem_object *obj,
+                          u32 *handlep);
+int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
+
+
+void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
+int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
+int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
+
+struct page **drm_gem_get_pages(struct drm_gem_object *obj);
+void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
+                bool dirty, bool accessed);
+
+struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
+                                             struct drm_file *filp,
+                                             u32 handle);
+int drm_gem_dumb_destroy(struct drm_file *file,
+                         struct drm_device *dev,
+                         uint32_t handle);
+
+#endif /* __DRM_GEM_H__ */