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126 lines
4.9 KiB
C
126 lines
4.9 KiB
C
/*
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* @File pvr_buffer_sync.h
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* @Title PowerVR Linux buffer sync interface
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* @Codingstyle LinuxKernel
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* @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
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* @License Dual MIT/GPLv2
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*
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* The contents of this file are subject to the MIT license as set out below.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License Version 2 ("GPL") in which case the provisions
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* of GPL are applicable instead of those above.
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*
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* If you wish to allow use of your version of this file only under the terms of
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* GPL, and not to allow others to use your version of this file under the terms
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* of the MIT license, indicate your decision by deleting the provisions above
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* and replace them with the notice and other provisions required by GPL as set
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* out in the file called "GPL-COPYING" included in this distribution. If you do
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* not delete the provisions above, a recipient may use your version of this file
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* under the terms of either the MIT license or GPL.
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*
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* This License is also included in this distribution in the file called
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* "MIT-COPYING".
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*
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* EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
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* PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef PVR_BUFFER_SYNC_H
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#define PVR_BUFFER_SYNC_H
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/types.h>
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struct _PMR_;
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struct pvr_buffer_sync_context;
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struct pvr_buffer_sync_append_data;
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/**
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* pvr_buffer_sync_context_create - creates a buffer sync context
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* @dev: Linux device
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* @name: context name (used for debugging)
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*
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* pvr_buffer_sync_context_destroy() should be used to clean up the buffer
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* sync context.
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*
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* Return: A buffer sync context or NULL if it fails for any reason.
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*/
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struct pvr_buffer_sync_context *
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pvr_buffer_sync_context_create(struct device *dev, const char *name);
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/**
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* pvr_buffer_sync_context_destroy() - frees a buffer sync context
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* @ctx: buffer sync context
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*/
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void
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pvr_buffer_sync_context_destroy(struct pvr_buffer_sync_context *ctx);
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/**
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* pvr_buffer_sync_resolve_and_create_fences() - create checkpoints from
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* buffers
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* @ctx: buffer sync context
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* @sync_checkpoint_ctx: context in which to create sync checkpoints
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* @nr_pmrs: number of buffer objects (PMRs)
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* @pmrs: buffer array
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* @pmr_flags: internal flags
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* @nr_fence_checkpoints_out: returned number of fence sync checkpoints
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* @fence_checkpoints_out: returned array of fence sync checkpoints
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* @update_checkpoint_out: returned update sync checkpoint
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* @data_out: returned buffer sync data
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*
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* After this call, either pvr_buffer_sync_kick_succeeded() or
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* pvr_buffer_sync_kick_failed() must be called.
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*
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* Return: 0 on success or an error code otherwise.
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*/
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int
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pvr_buffer_sync_resolve_and_create_fences(struct pvr_buffer_sync_context *ctx,
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PSYNC_CHECKPOINT_CONTEXT sync_checkpoint_ctx,
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u32 nr_pmrs,
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struct _PMR_ **pmrs,
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u32 *pmr_flags,
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u32 *nr_fence_checkpoints_out,
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PSYNC_CHECKPOINT **fence_checkpoints_out,
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PSYNC_CHECKPOINT *update_checkpoint_out,
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struct pvr_buffer_sync_append_data **data_out);
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/**
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* pvr_buffer_sync_kick_succeeded() - cleans up after a successful kick
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* operation
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* @data: buffer sync data returned by
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* pvr_buffer_sync_resolve_and_create_fences()
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*
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* Should only be called following pvr_buffer_sync_resolve_and_create_fences().
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*/
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void
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pvr_buffer_sync_kick_succeeded(struct pvr_buffer_sync_append_data *data);
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/**
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* pvr_buffer_sync_kick_failed() - cleans up after a failed kick operation
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* @data: buffer sync data returned by
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* pvr_buffer_sync_resolve_and_create_fences()
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*
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* Should only be called following pvr_buffer_sync_resolve_and_create_fences().
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*/
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void
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pvr_buffer_sync_kick_failed(struct pvr_buffer_sync_append_data *data);
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#endif /* PVR_BUFFER_SYNC_H */
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