Changes in V4: 1. Change to use dma_mmap_coherent api for vop mmap callback. 2. Add dp_mmap callback to map device page to userspace instead of get_dp_dma callback. 3. Move all the dma related changes to patch 1. 4. Kill the mic_dp_init/mic_dp_uninit and inline those into the callers as Christoph suggested. 5. Keep the code following the 80-character line rule. 6. Add endian swap for vqconfig[i].address. The original vop driver only supports dma coherent device, as it allocates and maps vring by _get_free_pages and dma_map_single, but not use dma_sync_single_for_cpu/device to sync the updates of device_page/vring between EP and RC, which will cause memory synchronization problem for device don't support hardware dma coherent. And allocate vrings use dma_alloc_coherent is a common way in kernel, as the memory interacted between two systems should use consistent memory to avoid caching effects. So here add noncoherent platform support for vop driver. Also add some related dma changes to make sure noncoherent platform works well. Sherry Sun (2): misc: vop: change the way of allocating vring and device page misc: vop: do not allocate and reassign the used ring drivers/misc/mic/bus/vop_bus.h | 2 + drivers/misc/mic/host/mic_boot.c | 9 +++ drivers/misc/mic/host/mic_main.c | 43 +++-------- drivers/misc/mic/vop/vop_debugfs.c | 2 - drivers/misc/mic/vop/vop_main.c | 51 +++---------- drivers/misc/mic/vop/vop_vringh.c | 110 +++++++++-------------------- include/uapi/linux/mic_common.h | 5 +- 7 files changed, 66 insertions(+), 156 deletions(-) -- 2.17.1
