IABSD.fr/xenocara/lib/libdrm/freedreno/freedreno_ringbuffer.h

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• Author : jsg
  Date : 2018-11-01 08:22:36
  Hash : 38495421
  Message : Import libdrm 2.4.96

• lib/libdrm/freedreno/freedreno_ringbuffer.h

• /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
  
  /*
   * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   *
   * 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
   * THE AUTHORS OR COPYRIGHT HOLDERS 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.
   *
   * Authors:
   *    Rob Clark <robclark@freedesktop.org>
   */
  
  #ifndef FREEDRENO_RINGBUFFER_H_
  #define FREEDRENO_RINGBUFFER_H_
  
  #include <freedreno_drmif.h>
  
  /* the ringbuffer object is not opaque so that OUT_RING() type stuff
   * can be inlined.  Note that users should not make assumptions about
   * the size of this struct.
   */
  
  struct fd_ringbuffer_funcs;
  
  enum fd_ringbuffer_flags {
  
  	/* Ringbuffer is a "state object", which is potentially reused
  	 * many times, rather than being used in one-shot mode linked
  	 * to a parent ringbuffer.
  	 */
  	FD_RINGBUFFER_OBJECT = 0x1,
  
  	/* Hint that the stateobj will be used for streaming state
  	 * that is used once or a few times and then discarded.
  	 *
  	 * For sub-allocation, non streaming stateobj's should be
  	 * sub-allocated from a page size buffer, so one long lived
  	 * state obj doesn't prevent other pages from being freed.
  	 * (Ie. it would be no worse than allocating a page sized
  	 * bo for each small non-streaming stateobj).
  	 *
  	 * But streaming stateobj's could be sub-allocated from a
  	 * larger buffer to reduce the alloc/del overhead.
  	 */
  	FD_RINGBUFFER_STREAMING = 0x2,
  };
  
  struct fd_ringbuffer {
  	int size;
  	uint32_t *cur, *end, *start, *last_start;
  	struct fd_pipe *pipe;
  	const struct fd_ringbuffer_funcs *funcs;
  	uint32_t last_timestamp;
  	struct fd_ringbuffer *parent;
  
  	/* for users of fd_ringbuffer to store their own private per-
  	 * ringbuffer data
  	 */
  	void *user;
  
  	enum fd_ringbuffer_flags flags;
  
  	/* This is a bit gross, but we can't use atomic_t in exported
  	 * headers.  OTOH, we don't need the refcnt to be publicly
  	 * visible.  The only reason that this struct is exported is
  	 * because fd_ringbuffer_emit needs to be something that can
  	 * be inlined for performance reasons.
  	 */
  	union {
  #ifdef HAS_ATOMIC_OPS
  		atomic_t refcnt;
  #endif
  		uint64_t __pad;
  	};
  };
  
  struct fd_ringbuffer * fd_ringbuffer_new(struct fd_pipe *pipe,
  		uint32_t size);
  will_be_deprecated
  struct fd_ringbuffer * fd_ringbuffer_new_object(struct fd_pipe *pipe,
  		uint32_t size);
  struct fd_ringbuffer * fd_ringbuffer_new_flags(struct fd_pipe *pipe,
  		uint32_t size, enum fd_ringbuffer_flags flags);
  
  struct fd_ringbuffer *fd_ringbuffer_ref(struct fd_ringbuffer *ring);
  void fd_ringbuffer_del(struct fd_ringbuffer *ring);
  void fd_ringbuffer_set_parent(struct fd_ringbuffer *ring,
  		struct fd_ringbuffer *parent);
  will_be_deprecated
  void fd_ringbuffer_reset(struct fd_ringbuffer *ring);
  int fd_ringbuffer_flush(struct fd_ringbuffer *ring);
  /* in_fence_fd: -1 for no in-fence, else fence fd
   * out_fence_fd: NULL for no output-fence requested, else ptr to return out-fence
   */
  int fd_ringbuffer_flush2(struct fd_ringbuffer *ring, int in_fence_fd,
  		int *out_fence_fd);
  void fd_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t ndwords);
  uint32_t fd_ringbuffer_timestamp(struct fd_ringbuffer *ring);
  
  static inline void fd_ringbuffer_emit(struct fd_ringbuffer *ring,
  		uint32_t data)
  {
  	(*ring->cur++) = data;
  }
  
  struct fd_reloc {
  	struct fd_bo *bo;
  #define FD_RELOC_READ             0x0001
  #define FD_RELOC_WRITE            0x0002
  	uint32_t flags;
  	uint32_t offset;
  	uint32_t or;
  	int32_t  shift;
  	uint32_t orhi;      /* used for a5xx+ */
  };
  
  /* NOTE: relocs are 2 dwords on a5xx+ */
  
  void fd_ringbuffer_reloc2(struct fd_ringbuffer *ring, const struct fd_reloc *reloc);
  will_be_deprecated void fd_ringbuffer_reloc(struct fd_ringbuffer *ring, const struct fd_reloc *reloc);
  uint32_t fd_ringbuffer_cmd_count(struct fd_ringbuffer *ring);
  uint32_t fd_ringbuffer_emit_reloc_ring_full(struct fd_ringbuffer *ring,
  		struct fd_ringbuffer *target, uint32_t cmd_idx);
  uint32_t fd_ringbuffer_size(struct fd_ringbuffer *ring);
  
  #endif /* FREEDRENO_RINGBUFFER_H_ */