1*262f27b2SOleksandr Tymoshenko /** 2*262f27b2SOleksandr Tymoshenko * Copyright (c) 2010-2012 Broadcom. All rights reserved. 3*262f27b2SOleksandr Tymoshenko * 4*262f27b2SOleksandr Tymoshenko * Redistribution and use in source and binary forms, with or without 5*262f27b2SOleksandr Tymoshenko * modification, are permitted provided that the following conditions 6*262f27b2SOleksandr Tymoshenko * are met: 7*262f27b2SOleksandr Tymoshenko * 1. Redistributions of source code must retain the above copyright 8*262f27b2SOleksandr Tymoshenko * notice, this list of conditions, and the following disclaimer, 9*262f27b2SOleksandr Tymoshenko * without modification. 10*262f27b2SOleksandr Tymoshenko * 2. Redistributions in binary form must reproduce the above copyright 11*262f27b2SOleksandr Tymoshenko * notice, this list of conditions and the following disclaimer in the 12*262f27b2SOleksandr Tymoshenko * documentation and/or other materials provided with the distribution. 13*262f27b2SOleksandr Tymoshenko * 3. The names of the above-listed copyright holders may not be used 14*262f27b2SOleksandr Tymoshenko * to endorse or promote products derived from this software without 15*262f27b2SOleksandr Tymoshenko * specific prior written permission. 16*262f27b2SOleksandr Tymoshenko * 17*262f27b2SOleksandr Tymoshenko * ALTERNATIVELY, this software may be distributed under the terms of the 18*262f27b2SOleksandr Tymoshenko * GNU General Public License ("GPL") version 2, as published by the Free 19*262f27b2SOleksandr Tymoshenko * Software Foundation. 20*262f27b2SOleksandr Tymoshenko * 21*262f27b2SOleksandr Tymoshenko * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 22*262f27b2SOleksandr Tymoshenko * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23*262f27b2SOleksandr Tymoshenko * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24*262f27b2SOleksandr Tymoshenko * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 25*262f27b2SOleksandr Tymoshenko * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 26*262f27b2SOleksandr Tymoshenko * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27*262f27b2SOleksandr Tymoshenko * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28*262f27b2SOleksandr Tymoshenko * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29*262f27b2SOleksandr Tymoshenko * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30*262f27b2SOleksandr Tymoshenko * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31*262f27b2SOleksandr Tymoshenko * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32*262f27b2SOleksandr Tymoshenko */ 33*262f27b2SOleksandr Tymoshenko 34*262f27b2SOleksandr Tymoshenko #ifndef VCHI_CFG_INTERNAL_H_ 35*262f27b2SOleksandr Tymoshenko #define VCHI_CFG_INTERNAL_H_ 36*262f27b2SOleksandr Tymoshenko 37*262f27b2SOleksandr Tymoshenko /**************************************************************************************** 38*262f27b2SOleksandr Tymoshenko * Control optimisation attempts. 39*262f27b2SOleksandr Tymoshenko ***************************************************************************************/ 40*262f27b2SOleksandr Tymoshenko 41*262f27b2SOleksandr Tymoshenko // Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second 42*262f27b2SOleksandr Tymoshenko #define VCHI_COARSE_LOCKING 43*262f27b2SOleksandr Tymoshenko 44*262f27b2SOleksandr Tymoshenko // Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx) 45*262f27b2SOleksandr Tymoshenko // (only relevant if VCHI_COARSE_LOCKING) 46*262f27b2SOleksandr Tymoshenko #define VCHI_ELIDE_BLOCK_EXIT_LOCK 47*262f27b2SOleksandr Tymoshenko 48*262f27b2SOleksandr Tymoshenko // Avoid lock on non-blocking peek 49*262f27b2SOleksandr Tymoshenko // (only relevant if VCHI_COARSE_LOCKING) 50*262f27b2SOleksandr Tymoshenko #define VCHI_AVOID_PEEK_LOCK 51*262f27b2SOleksandr Tymoshenko 52*262f27b2SOleksandr Tymoshenko // Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation. 53*262f27b2SOleksandr Tymoshenko #define VCHI_MULTIPLE_HANDLER_THREADS 54*262f27b2SOleksandr Tymoshenko 55*262f27b2SOleksandr Tymoshenko // Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash 56*262f27b2SOleksandr Tymoshenko // our way through the pool of descriptors. 57*262f27b2SOleksandr Tymoshenko #define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD 58*262f27b2SOleksandr Tymoshenko 59*262f27b2SOleksandr Tymoshenko // Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING. 60*262f27b2SOleksandr Tymoshenko #define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS 61*262f27b2SOleksandr Tymoshenko 62*262f27b2SOleksandr Tymoshenko // Don't use message descriptors for TX messages that don't need them 63*262f27b2SOleksandr Tymoshenko #define VCHI_MINIMISE_TX_MSG_DESCRIPTORS 64*262f27b2SOleksandr Tymoshenko 65*262f27b2SOleksandr Tymoshenko // Nano-locks for multiqueue 66*262f27b2SOleksandr Tymoshenko //#define VCHI_MQUEUE_NANOLOCKS 67*262f27b2SOleksandr Tymoshenko 68*262f27b2SOleksandr Tymoshenko // Lock-free(er) dequeuing 69*262f27b2SOleksandr Tymoshenko //#define VCHI_RX_NANOLOCKS 70*262f27b2SOleksandr Tymoshenko 71*262f27b2SOleksandr Tymoshenko #endif /*VCHI_CFG_INTERNAL_H_*/ 72