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- #
- # (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
- #
- # This program is free software and is provided to you under the terms of the
- # GNU General Public License version 2 as published by the Free Software
- # Foundation, and any use by you of this program is subject to the terms
- # of such GNU licence.
- #
- # A copy of the licence is included with the program, and can also be obtained
- # from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- # Boston, MA 02110-1301, USA.
- #
- #
- =====================
- dma-buf-test-exporter
- =====================
- Overview
- --------
- The dma-buf-test-exporter is a simple exporter of dma_buf objects.
- It has a private API to allocate and manipulate the buffers which are represented as dma_buf fds.
- The private API allows:
- * simple allocation of physically non-contiguous buffers
- * simple allocation of physically contiguous buffers
- * query kernel side API usage stats (number of attachments, number of mappings, mmaps)
- * failure mode configuration (fail attach, mapping, mmap)
- * kernel side memset of buffers
- The buffers support all of the dma_buf API, including mmap.
- It supports being compiled as a module both in-tree and out-of-tree.
- See include/linux/dma-buf-test-exporter.h for the ioctl interface.
- See Documentation/dma-buf-sharing.txt for details on dma_buf.
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