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66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef VCHI_CFG_INTERNAL_H_
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#define VCHI_CFG_INTERNAL_H_
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/****************************************************************************************
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* Control optimisation attempts.
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***************************************************************************************/
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// Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second
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#define VCHI_COARSE_LOCKING
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// Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx)
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// (only relevant if VCHI_COARSE_LOCKING)
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#define VCHI_ELIDE_BLOCK_EXIT_LOCK
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// Avoid lock on non-blocking peek
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// (only relevant if VCHI_COARSE_LOCKING)
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#define VCHI_AVOID_PEEK_LOCK
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// Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation.
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#define VCHI_MULTIPLE_HANDLER_THREADS
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// Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash
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// our way through the pool of descriptors.
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#define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD
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// Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING.
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#define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS
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// Don't use message descriptors for TX messages that don't need them
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#define VCHI_MINIMISE_TX_MSG_DESCRIPTORS
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// Nano-locks for multiqueue
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//#define VCHI_MQUEUE_NANOLOCKS
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// Lock-free(er) dequeuing
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//#define VCHI_RX_NANOLOCKS
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#endif /*VCHI_CFG_INTERNAL_H_*/
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