| # |
| # (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. |
| |
| |
