/*
 * Copyright © 2012 Rob Clark <robclark@freedesktop.org>
 * SPDX-License-Identifier: MIT
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#ifndef FREEDRENO_FENCE_H_
#define FREEDRENO_FENCE_H_

#include "pipe/p_context.h"
#include "util/u_queue.h"

#include "common/freedreno_common.h"
#include "drm/freedreno_drmif.h"

BEGINC;

struct pipe_fence_handle {
   struct pipe_reference reference;

   /* When a pre-created unflushed fence has no actual rendering to flush, and
    * the last_fence optimization is used, this will be a reference to the
    * *actualy* fence which needs to be flushed before waiting.
    */
   struct pipe_fence_handle *last_fence;

   /* fence holds a reference to the batch until the batch is flushed, to
    * accommodate PIPE_FLUSH_DEFERRED.  When the batch is actually flushed, it
    * is cleared (before the batch reference is dropped).  If we need to wait
    * on a fence, and the batch is not NULL, we need to flush it.
    *
    * Note that with u_threaded_context async flushes, if a fence is requested
    * by the frontend, the fence is initially created without a reference
    * to the batch, which is filled in later when fd_context_flush() is called
    * from the driver thread.  In this case tc_token will be non-null, in
    * which case threaded_context_flush() should be called in fd_fence_finish()
    */
   struct fd_batch *batch;

   struct tc_unflushed_batch_token *tc_token;
   bool needs_signal;

   /* For threaded_context async flushes, we must wait on the fence, signaled
    * when fence->batch is cleared, to know that the rendering has been actually
    * flushed from the driver thread.
    *
    * The ready fence is created signaled for non-async-flush fences, and only
    * transitions once from unsignalled->signalled for async-flush fences
    */
   struct util_queue_fence ready;

   /* Note that a fence can outlive the ctx, so we can only assume this is a
    * valid ptr for unflushed fences.  However we hold a reference to the
    * fence->pipe so that is safe to use after flushing.
    */
   struct fd_context *ctx;
   struct fd_pipe *pipe;
   struct fd_screen *screen;
   struct fd_fence *fence;

   bool use_fence_fd;
   bool flushed;
   uint32_t syncobj;
};

void fd_pipe_fence_repopulate(struct pipe_fence_handle *fence,
                              struct pipe_fence_handle *last_fence);
void fd_pipe_fence_ref(struct pipe_fence_handle **ptr,
                       struct pipe_fence_handle *pfence);
bool fd_pipe_fence_finish(struct pipe_screen *pscreen, struct pipe_context *ctx,
                          struct pipe_fence_handle *pfence, uint64_t timeout);
void fd_create_pipe_fence_fd(struct pipe_context *pctx,
                             struct pipe_fence_handle **pfence, int fd,
                             enum pipe_fd_type type);
void fd_pipe_fence_server_sync(struct pipe_context *pctx,
                               struct pipe_fence_handle *fence);
void fd_pipe_fence_server_signal(struct pipe_context *ctx,
                                 struct pipe_fence_handle *fence);
int fd_pipe_fence_get_fd(struct pipe_screen *pscreen,
                         struct pipe_fence_handle *pfence);
bool fd_pipe_fence_is_fd(struct pipe_fence_handle *fence);

struct fd_batch;
struct pipe_fence_handle *fd_pipe_fence_create(struct fd_batch *batch);

void fd_pipe_fence_set_batch(struct pipe_fence_handle *fence,
                             struct fd_batch *batch);
void fd_pipe_fence_set_submit_fence(struct pipe_fence_handle *fence,
                        struct fd_fence *submit_fence);

struct tc_unflushed_batch_token;
struct pipe_fence_handle *
fd_pipe_fence_create_unflushed(struct pipe_context *pctx,
                               struct tc_unflushed_batch_token *tc_token);

ENDC;

#endif /* FREEDRENO_FENCE_H_ */