WebSVN – Kolibri OS – Diff – /drivers/include/drm/ttm/ttm_bo_api.h

  */
 #ifndef _TTM_BO_API_H_
 #define _TTM_BO_API_H_
-#include "drm_hashtab.h"
+#include
 #include
 #include
-//#include
+#include
 #include
-//#include
+#include
-//#include
+#include
 #include
 /**
  * struct ttm_placement
+ *
  * @fpfn:		first valid page frame number to put the object
  * @lpfn:		last valid page frame number to put the object
- * @num_placement:	number of prefered placements
+ * @num_placement:	number of preferred placements
- * @placement:		prefered placements
+ * @placement:		preferred placements
- * @num_busy_placement:	number of prefered placements when need to evict buffer
+ * @num_busy_placement:	number of preferred placements when need to evict buffer
- * @busy_placement:	prefered placements when need to evict buffer
+ * @busy_placement:	preferred placements when need to evict buffer
+ *
  * Structure indicating the placement you request for an object.
  */
 struct ttm_placement {
 	unsigned	fpfn;
 	const uint32_t	*placement;
 	unsigned	num_busy_placement;
 	const uint32_t	*busy_placement;
 };
+/**
+ * struct ttm_bus_placement
+ *
+ * @addr:		mapped virtual address
+ * @base:		bus base address
+ * @is_iomem:		is this io memory ?
+ * @size:		size in byte
+ * @offset:		offset from the base address
+ * @io_reserved_vm:     The VM system has a refcount in @io_reserved_count
+ * @io_reserved_count:  Refcounting the numbers of callers to ttm_mem_io_reserve
+ *
+ * Structure indicating the bus placement of an object.
+ */
+struct ttm_bus_placement {
+	void		*addr;
+	unsigned long	base;
+	unsigned long	size;
+	unsigned long	offset;
+	bool		is_iomem;
+	bool		io_reserved_vm;
+	uint64_t        io_reserved_count;
+};
 /**
  * struct ttm_mem_reg
+ *
  * @mm_node: Memory manager node.
  * @size: Requested size of memory region.
  * @num_pages: Actual size of memory region in pages.
+ * @page_alignment: Page alignment.
- * @page_alignment: Page alignment.
+ * @placement: Placement flags.
- * @placement: Placement flags.
+ * @bus: Placement on io bus accessible to the CPU
+ *
  * Structure indicating the placement and space resources used by a
-    unsigned long size;
+	unsigned long size;
-    unsigned long num_pages;
+	unsigned long num_pages;
-    uint32_t page_alignment;
+	uint32_t page_alignment;
-    uint32_t mem_type;
+	uint32_t mem_type;
-    uint32_t placement;
+	uint32_t placement;
-//    struct ttm_bus_placement bus;
+	struct ttm_bus_placement bus;
 };
 /**
  * enum ttm_bo_type
+ *
  * @ttm_bo_type_device:	These are 'normal' buffers that can
  * be mmapped by user space. Each of these bos occupy a slot in the
  * device address space, that can be used for normal vm operations.
- *
- * @ttm_bo_type_user: These are user-space memory areas that are made
- * available to the GPU by mapping the buffer pages into the GPU aperture
- * space. These buffers cannot be mmaped from the device address space.
+ *
  * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
+ * but they cannot be accessed from user-space. For kernel-only use.
+ *
+ * @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another
- * but they cannot be accessed from user-space. For kernel-only use.
+ * driver.
  */
 enum ttm_bo_type {
 	ttm_bo_type_device,
-	ttm_bo_type_user,
+	ttm_bo_type_kernel,
-	ttm_bo_type_kernel
+	ttm_bo_type_sg
 };
 struct ttm_tt;
-/**
- * struct ttm_buffer_object
 /**
- * @bdev: Pointer to the buffer object device structure.
+ * struct ttm_buffer_object
  * @buffer_start: The virtual user-space start address of ttm_bo_type_user
- * buffers.
+ * @bdev: Pointer to the buffer object device structure.
  * @type: The bo type.
  * used to avoid destruction while the buffer object is still on a list.
  * Lru lists may keep one refcount, the delayed delete list, and kref != 0
  * keeps one refcount. When this refcount reaches zero,
  * the object is destroyed.
  * @event_queue: Queue for processes waiting on buffer object status change.
- * @lock: spinlock protecting mostly synchronization members.
  * @mem: structure describing current placement.
- * @persistant_swap_storage: Usually the swap storage is deleted for buffers
+ * @persistent_swap_storage: Usually the swap storage is deleted for buffers
  * pinned in physical memory. If this behaviour is not desired, this member
- * holds a pointer to a persistant shmem object.
+ * holds a pointer to a persistent shmem object.
  * @ttm: TTM structure holding system pages.
  * @evicted: Whether the object was evicted without user-space knowing.
  * @cpu_writes: For synchronization. Number of cpu writers.
  * @lru: List head for the lru list.
  * @ddestroy: List head for the delayed destroy list.
  * Used to avoid starvation when many processes compete to validate the
  * buffer. This member is protected by the bo_device::lru_lock.
  * @seq_valid: The value of @val_seq is valid. This value is protected by
  * the bo_device::lru_lock.
  * @reserved: Deadlock-free lock used for synchronization state transitions.
- * @sync_obj_arg: Opaque argument to synchronization object function.
  * @sync_obj: Pointer to a synchronization object.
  * @priv_flags: Flags describing buffer object internal state.
  * @vm_rb: Rb node for the vm rb tree.
  * @vm_node: Address space manager node.
  * @offset: The current GPU offset, which can have different meanings
 	 * Members constant at init.
 	 */
 	struct ttm_bo_global *glob;
-	struct ttm_bo_device *bdev;
-	unsigned long buffer_start;
+	struct ttm_bo_device *bdev;
 	enum ttm_bo_type type;
 	void (*destroy) (struct ttm_buffer_object *);
 	unsigned long num_pages;
 	uint64_t addr_space_offset;
 	* Members not needing protection.
 	*/
-   struct kref kref;
+	struct kref kref;
-   struct kref list_kref;
+	struct kref list_kref;
-//   wait_queue_head_t event_queue;
-   spinlock_t lock;
+	wait_queue_head_t event_queue;
 	/**
 	 * Members protected by the bo::reserved lock.
 	 */
 	struct ttm_mem_reg mem;
-//   struct file *persistant_swap_storage;
+	struct file *persistent_swap_storage;
 	struct ttm_tt *ttm;
 	 */
 	struct list_head lru;
 	struct list_head ddestroy;
+	struct list_head swap;
-	struct list_head swap;
+	struct list_head io_reserve_lru;
 	uint32_t val_seq;
 	bool seq_valid;
 	/**
 	 * Members protected by the bdev::lru_lock
 	 * only when written to.
-	 */
 	 */
-   atomic_t reserved;
+	atomic_t reserved;
+	/**
 	 * Members protected by struct buffer_object_device::fence_lock
-	/**
+	 * In addition, setting sync_obj to anything else
-	 * Members protected by the bo::lock
+	 * than NULL requires bo::reserved to be held. This allows for
-	 */
+	 * checking NULL while reserved but not holding the mentioned lock.
 	 */
 	 * either of these locks held.
 	 */
 	unsigned long offset;
+	uint32_t cur_placement;
-	uint32_t cur_placement;
+	struct sg_table *sg;
 };
 /**
 		ttm_bo_map_iomap        = 1 | TTM_BO_MAP_IOMEM_MASK,
 		ttm_bo_map_vmap         = 2,
 		ttm_bo_map_kmap         = 3,
 		ttm_bo_map_premapped    = 4 | TTM_BO_MAP_IOMEM_MASK,
 	} bo_kmap_type;
+	struct ttm_buffer_object *bo;
 };
 /**
  * ttm_bo_reference - reference a struct ttm_buffer_object
  * ttm_bo_validate
+ *
  * @bo: The buffer object.
  * @placement: Proposed placement for the buffer object.
  * @interruptible: Sleep interruptible if sleeping.
- * @no_wait_reserve: Return immediately if other buffers are busy.
  * @no_wait_gpu: Return immediately if the GPU is busy.
+ *
  * Changes placement and caching policy of the buffer object
  * according proposed placement.
  * Returns
  * -EBUSY if no_wait is true and buffer busy.
  * -ERESTARTSYS if interrupted by a signal.
  */
 extern int ttm_bo_validate(struct ttm_buffer_object *bo,
 				struct ttm_placement *placement,
-				bool interruptible, bool no_wait_reserve,
+				bool interruptible,
 				bool no_wait_gpu);
 /**
  * ttm_bo_unref
+ *
  * Unreference and clear a pointer to a buffer object.
  */
 extern void ttm_bo_unref(struct ttm_buffer_object **bo);
+/**
+ * ttm_bo_list_ref_sub
+ *
+ * @bo: The buffer object.
+ * @count: The number of references with which to decrease @bo::list_kref;
+ * @never_free: The refcount should not reach zero with this operation.
+ *
+ * Release @count lru list references to this buffer object.
+ */
+extern void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
+				bool never_free);
+/**
+ * ttm_bo_add_to_lru
+ *
+ * @bo: The buffer object.
+ *
+ * Add this bo to the relevant mem type lru and, if it's backed by
+ * system pages (ttms) to the swap list.
+ * This function must be called with struct ttm_bo_global::lru_lock held, and
+ * is typically called immediately prior to unreserving a bo.
+ */
+extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
+/**
+ * ttm_bo_del_from_lru
+ *
+ * @bo: The buffer object.
+ *
+ * Remove this bo from all lru lists used to lookup and reserve an object.
+ * This function must be called with struct ttm_bo_global::lru_lock held,
+ * and is usually called just immediately after the bo has been reserved to
+ * avoid recursive reservation from lru lists.
+ */
+extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
+/**
+ * ttm_bo_lock_delayed_workqueue
+ *
+ * Prevent the delayed workqueue from running.
+ * Returns
+ * True if the workqueue was queued at the time
+ */
+extern int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev);
+/**
+ * ttm_bo_unlock_delayed_workqueue
+ *
+ * Allows the delayed workqueue to run.
+ */
+extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev,
+					    int resched);
 /**
  * ttm_bo_synccpu_write_grab
+ *
  * @bo: The buffer object:
  * @no_wait: Return immediately if buffer is busy.
+ *
  * Synchronizes a buffer object for CPU RW access. This means
- * blocking command submission that affects the buffer and
+ * command submission that affects the buffer will return -EBUSY
+ * until ttm_bo_synccpu_write_release is called.
  * waiting for buffer idle. This lock is recursive.
  * Returns
  * -EBUSY if the buffer is busy and no_wait is true.
  * -ERESTARTSYS if interrupted by a signal.
- */
  */
 extern int
+ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
 ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
 /**
  * ttm_bo_synccpu_write_release:
+ *
  * @bo : The buffer object.
+ *
  * Releases a synccpu lock.
  */
 extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo);
+/**
+ * ttm_bo_acc_size
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @bo_size: size of the buffer object in byte.
+ * @struct_size: size of the structure holding buffer object datas
+ *
+ * Returns size to account for a buffer object
+ */
+size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
+		       unsigned long bo_size,
+		       unsigned struct_size);
+size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
+			   unsigned long bo_size,
+			   unsigned struct_size);
 /**
  * ttm_bo_init
+ *
  * @bdev: Pointer to a ttm_bo_device struct.
  * @bo: Pointer to a ttm_buffer_object to be initialized.
  * @size: Requested size of buffer object.
  * @type: Requested type of buffer object.
- * @flags: Initial placement flags.
- * @page_alignment: Data alignment in pages.
- * @buffer_start: Virtual address of user space data backing a
+ * @flags: Initial placement flags.
- * user buffer object.
+ * @page_alignment: Data alignment in pages.
  * @interruptible: If needing to sleep to wait for GPU resources,
  * sleep interruptible.
  * @persistent_swap_storage: Usually the swap storage is deleted for buffers
 			struct ttm_buffer_object *bo,
 			unsigned long size,
 			enum ttm_bo_type type,
 			struct ttm_placement *placement,
 			uint32_t page_alignment,
-			unsigned long buffer_start,
 			bool interrubtible,
 			struct file *persistent_swap_storage,
 			size_t acc_size,
+			struct sg_table *sg,
 			void (*destroy) (struct ttm_buffer_object *));
 /**
  * ttm_bo_synccpu_object_init
+ *
  * @bdev: Pointer to a ttm_bo_device struct.
  * @bo: Pointer to a ttm_buffer_object to be initialized.
  * @size: Requested size of buffer object.
  * @type: Requested type of buffer object.
  * @flags: Initial placement flags.
  * @page_alignment: Data alignment in pages.
- * @buffer_start: Virtual address of user space data backing a
- * user buffer object.
  * @interruptible: If needing to sleep while waiting for GPU resources,
  * sleep interruptible.
  * @persistent_swap_storage: Usually the swap storage is deleted for buffers
  * pinned in physical memory. If this behaviour is not desired, this member
  * holds a pointer to a persistent shmem object. Typically, this would
 extern int ttm_bo_create(struct ttm_bo_device *bdev,
 				unsigned long size,
 				enum ttm_bo_type type,
 				struct ttm_placement *placement,
 				uint32_t page_alignment,
-				unsigned long buffer_start,
 				bool interruptible,
 				struct file *persistent_swap_storage,
 				struct ttm_buffer_object **p_bo);
  * Unmaps a kernel map set up by ttm_bo_kmap.
  */
-extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
-#if 0
-#endif
+extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
 /**
  * ttm_fbdev_mmap - mmap fbdev memory backed by a ttm buffer object.
+ *
 			 const char __user *wbuf, char __user *rbuf,
 			 size_t count, loff_t *f_pos, bool write);
+extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
+/**
+ * ttm_bo_is_reserved - return an indication if a ttm buffer object is reserved
+ *
+ * @bo:     The buffer object to check.
+ *
+ * This function returns an indication if a bo is reserved or not, and should
+ * only be used to print an error when it is not from incorrect api usage, since
+ * there's no guarantee that it is the caller that is holding the reservation.
+ */
+static inline bool ttm_bo_is_reserved(struct ttm_buffer_object *bo)
+{
+	return atomic_read(&bo->reserved);
 extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev);

Subversion Repositories Kolibri OS

(root)/drivers/include/drm/ttm/ttm_bo_api.h – Rev 3031 → 3262