Changelog v2 -> v3: * https://lore.kernel.org/linux-iio/20210212101143.18993-1-alexandru.ardelean@xxxxxxxxxx/T/#u * added 'Documentation: iio: add doc for high-speed buffer API' * add 'iio: buffer-dma: split iio_dma_buffer_fileio_free() function' * patch 'iio: buffer-dma: Add mmap support' - unwind free on error path in iio_dma_buffer_alloc_blocks() - removed double mm.h include * patch 'tools: iio: add example for high-speed buffer support' - call IIO_BUFFER_BLOCK_FREE_IOCTL on the error path of the enable_high_speed() function Changelog v1 -> v2: * https://lore.kernel.org/linux-iio/20210211123353.78963-1-alexandru.ardelean@xxxxxxxxxx/T/#t * removed IIO_BUFFER_BLOCK_FLAG_CYCLIC flag; will be added in a later patch * removed extra line in tools/iio/iio_generic_buffer.c * patch 'iio: core: Add mmap interface infrastructure' added docstrings for new hooks (alloc_blocks, mmap, etc) This is basically Lars' work adapted from branch: https://github.com/larsclausen/linux/commits/iio-high-speed-5.10 [hopefully i got the stuff correctly from that branch] What is different, is that this one is adapted on top of the multibuffer support (currently at v5) discussed here: https://lore.kernel.org/linux-iio/20210211122452.78106-1-alexandru.ardelean@xxxxxxxxxx/T/#t Also, adapted an example for high-speed/mmap support in 'tools/iio/iio_generic_buffer.c' The example is adapted from libiio: https://github.com/analogdevicesinc/libiio/blob/master/local.c#L51 but will all the ioctl()s organized after the one that are reserved (hopefully) for IIO Tested that mmap() works. Moved (artifically) valid buffer0 as buffer2 and the operation still works. Alexandru Ardelean (3): Documentation: iio: add doc for high-speed buffer API iio: buffer-dma: split iio_dma_buffer_fileio_free() function tools: iio: add example for high-speed buffer support Lars-Peter Clausen (2): iio: core: Add mmap interface infrastructure iio: buffer-dma: Add mmap support Documentation/iio/iio_high_speed_buffers.rst | 100 ++++++ Documentation/iio/index.rst | 2 + drivers/iio/buffer/industrialio-buffer-dma.c | 324 ++++++++++++++++-- .../buffer/industrialio-buffer-dmaengine.c | 22 +- drivers/iio/industrialio-buffer.c | 158 +++++++++ include/linux/iio/buffer-dma.h | 27 +- include/linux/iio/buffer_impl.h | 23 ++ include/uapi/linux/iio/buffer.h | 49 +++ tools/iio/iio_generic_buffer.c | 184 +++++++++- 9 files changed, 841 insertions(+), 48 deletions(-) create mode 100644 Documentation/iio/iio_high_speed_buffers.rst -- 2.17.1
