60c206456f
To bring OSIF driver synchronization in line with recent VDEV and PSOC enhancements, add osif_driver_sync APIs. These allow for atomically acquiring the driver synchronization context, and protecting various call flows via DSC primitives. Change-Id: Iba8df54bb1a3894118adf3daf1d0de8a554284ae CRs-Fixed: 2408210
160 linhas
4.8 KiB
C
160 linhas
4.8 KiB
C
/*
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* Copyright (c) 2019 The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for
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* any purpose with or without fee is hereby granted, provided that the
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* above copyright notice and this permission notice appear in all
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* copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __OSIF_DRIVER_SYNC_H
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#define __OSIF_DRIVER_SYNC_H
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#include "qdf_types.h"
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/**
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* struct osif_driver_sync - opaque synchronization handle for a driver
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*/
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struct osif_driver_sync;
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/**
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* osif_driver_sync_create() - create a driver synchronization context
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* @out_driver_sync: out parameter for the new synchronization context
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*
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* Return: Errno
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*/
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qdf_must_check int
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osif_driver_sync_create(struct osif_driver_sync **out_driver_sync);
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/**
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* osif_driver_sync_create_and_trans() - create a driver synchronization context
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* @out_driver_sync: out parameter for the new synchronization context
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*
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* For protecting the driver initialization process.
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*
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* Return: Errno
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*/
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#define osif_driver_sync_create_and_trans(out_driver_sync) \
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__osif_driver_sync_create_and_trans(out_driver_sync, __func__)
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qdf_must_check int
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__osif_driver_sync_create_and_trans(struct osif_driver_sync **out_driver_sync,
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const char *desc);
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/**
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* osif_driver_sync_destroy() - destroy a driver synchronization context
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* @driver_sync: the context to destroy
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*
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* Return: none
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*/
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void osif_driver_sync_destroy(struct osif_driver_sync *driver_sync);
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/**
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* osif_driver_sync_register() - register a driver for operations/transitions
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* @driver_sync: the driver synchronization context to register
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*
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* Return: none
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*/
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void osif_driver_sync_register(struct osif_driver_sync *driver_sync);
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/**
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* osif_driver_sync_unregister() - unregister a driver for
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* operations/transitions
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*
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* Return: the driver synchronization context that was registered for @dev
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*/
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struct osif_driver_sync *osif_driver_sync_unregister(void);
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/**
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* osif_driver_sync_trans_start() - attempt to start a driver transition
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* @out_driver_sync: out parameter for the synchronization context previously
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* registered, populated on success
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*
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* Return: Errno
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*/
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#define osif_driver_sync_trans_start(out_driver_sync) \
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__osif_driver_sync_trans_start(out_driver_sync, __func__)
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qdf_must_check int
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__osif_driver_sync_trans_start(struct osif_driver_sync **out_driver_sync,
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const char *desc);
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/**
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* osif_driver_sync_trans_start_wait() - attempt to start a driver transition,
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* blocking if a conflicting transition is in flight
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* @out_driver_sync: out parameter for the synchronization context previously
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* registered, populated on success
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*
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* Return: Errno
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*/
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#define osif_driver_sync_trans_start_wait(out_driver_sync) \
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__osif_driver_sync_trans_start_wait(out_driver_sync, __func__)
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qdf_must_check int
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__osif_driver_sync_trans_start_wait(struct osif_driver_sync **out_driver_sync,
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const char *desc);
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/**
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* osif_driver_sync_trans_stop() - stop a transition associated with
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* @driver_sync
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* @driver_sync: the synchonization context tracking the transition
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*
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* Return: none
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*/
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void osif_driver_sync_trans_stop(struct osif_driver_sync *driver_sync);
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/**
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* osif_driver_sync_assert_trans_protected() - assert that the driver is
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* currently protected by a transition
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*
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* Return: none
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*/
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void osif_driver_sync_assert_trans_protected(void);
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/**
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* osif_driver_sync_op_start() - attempt to start a driver operation
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* @out_driver_sync: out parameter for the synchronization context previously
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* registered, populated on success
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*
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* Return: Errno
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*/
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#define osif_driver_sync_op_start(out_driver_sync) \
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__osif_driver_sync_op_start(out_driver_sync, __func__)
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qdf_must_check int
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__osif_driver_sync_op_start(struct osif_driver_sync **out_driver_sync,
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const char *func);
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/**
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* osif_driver_sync_op_stop() - stop an operation associated with @driver_sync
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* @driver_sync: the synchonization context tracking the operation
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*
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* Return: none
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*/
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#define osif_driver_sync_op_stop(driver_sync) \
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__osif_driver_sync_op_stop(driver_sync, __func__)
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void __osif_driver_sync_op_stop(struct osif_driver_sync *driver_sync,
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const char *func);
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/**
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* osif_driver_sync_wait_for_ops() - wait until all @driver_sync operations
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* complete
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* @driver_sync: the synchonization context tracking the operations
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*
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* Return: None
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*/
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void osif_driver_sync_wait_for_ops(struct osif_driver_sync *driver_sync);
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#endif /* __OSIF_DRIVER_SYNC_H */
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