kernel/drivers/staging/imgtec/pvr_buffer_sync.h

/* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* vi: set ts=8 sw=8 sts=8: */
/*************************************************************************/ /*!
@File           pvr_buffer_sync.h
@Title          PowerVR Linux buffer sync interface
@Codingstyle    LinuxKernel
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@License        MIT

The contents of this file are subject to the MIT license as set out below.

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 shall be included in
all copies or substantial portions of the Software.

This License is also included in this distribution in the file called
"MIT-COPYING".

EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) 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; AND (B) 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.
*/ /**************************************************************************/

#if !defined(__PVR_BUFFER_SYNC_H__)
#define __PVR_BUFFER_SYNC_H__

#include <linux/device.h>
#include <linux/err.h>
#include <linux/types.h>

struct _RGXFWIF_DEV_VIRTADDR_;
struct _PMR_;
struct pvr_buffer_sync_context;
struct pvr_buffer_sync_append_data;

/**
 * pvr_buffer_sync_context_create - creates a buffer sync context
 * @dev: linux device
 * @name: context name (used for debugging)
 *
 * This function returns a buffer sync context, or NULL if it fails for any
 * reason.
 *
 * @pvr_buffer_sync_context_destroy should be used to clean up the buffer sync
 * context.
 */
struct pvr_buffer_sync_context *
pvr_buffer_sync_context_create(struct device *dev, const char *name);

/**
 * pvr_buffer_sync_context_destroy - frees a buffer sync context
 * @ctx: buffer sync context
 */
void
pvr_buffer_sync_context_destroy(struct pvr_buffer_sync_context *ctx);

/**
 * pvr_buffer_sync_resolve_and_create_fences - create checkpoints from buffers
 * @ctx: buffer sync context
 * @nr_pmrs: number of buffer objects (PMRs)
 * @pmrs: buffer array
 * @pmr_flags: internal flags
 * @nr_fence_checkpoints_out: returned number of fence sync checkpoints
 * @fence_checkpoints_out: returned array of fence sync checkpoints
 * @update_checkpoint_out: returned update sync checkpoint
 * @data_out: returned buffer sync data
 *
 * This function returns 0 on success, or an error code otherwise.
 *
 * After this call, either @pvr_buffer_sync_kick_succeeded or
 * @pvr_buffer_sync_kick_failed must be called.
 */
int
pvr_buffer_sync_resolve_and_create_fences(struct pvr_buffer_sync_context *ctx,
					  u32 nr_pmrs,
					  struct _PMR_ **pmrs,
					  u32 *pmr_flags,
					  u32 *nr_fence_checkpoints_out,
					  PSYNC_CHECKPOINT **fence_checkpoints_out,
					  PSYNC_CHECKPOINT *update_checkpoint_out,
					  struct pvr_buffer_sync_append_data **data_out);

/**
 * pvr_buffer_sync_kick_succeeded - cleans up after a successful kick operation
 * @data: buffer sync data returned by @pvr_buffer_sync_resolve_and_create_fences
 *
 * Should only be called following @pvr_buffer_sync_resolve_and_create_fences.
 */
void
pvr_buffer_sync_kick_succeeded(struct pvr_buffer_sync_append_data *data);

/**
 * pvr_buffer_sync_kick_succeeded - cleans up after a failed kick operation
 * @data: buffer sync data returned by @pvr_buffer_sync_resolve_and_create_fences
 *
 * Should only be called following @pvr_buffer_sync_resolve_and_create_fences.
 */
void
pvr_buffer_sync_kick_failed(struct pvr_buffer_sync_append_data *data);

#endif /* !defined(__PVR_BUFFER_SYNC_H__) */