diff options
Diffstat (limited to 'drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h')
-rw-r--r-- | drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h b/drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h new file mode 100644 index 000000000000..35dcba4837d4 --- /dev/null +++ b/drivers/staging/vc04_services/interface/vchi/vchi_cfg_internal.h @@ -0,0 +1,71 @@ +/** + * Copyright (c) 2010-2012 Broadcom. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the above-listed copyright holders may not be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2, as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef VCHI_CFG_INTERNAL_H_ +#define VCHI_CFG_INTERNAL_H_ + +/**************************************************************************************** + * Control optimisation attempts. + ***************************************************************************************/ + +// Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second +#define VCHI_COARSE_LOCKING + +// Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx) +// (only relevant if VCHI_COARSE_LOCKING) +#define VCHI_ELIDE_BLOCK_EXIT_LOCK + +// Avoid lock on non-blocking peek +// (only relevant if VCHI_COARSE_LOCKING) +#define VCHI_AVOID_PEEK_LOCK + +// Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation. +#define VCHI_MULTIPLE_HANDLER_THREADS + +// Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash +// our way through the pool of descriptors. +#define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD + +// Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING. +#define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS + +// Don't use message descriptors for TX messages that don't need them +#define VCHI_MINIMISE_TX_MSG_DESCRIPTORS + +// Nano-locks for multiqueue +//#define VCHI_MQUEUE_NANOLOCKS + +// Lock-free(er) dequeuing +//#define VCHI_RX_NANOLOCKS + +#endif /*VCHI_CFG_INTERNAL_H_*/ |