Hi,
This small patchset adds three new IOCTLs that can be used to attach, detach, or transfer from/to a DMABUF object.
Changes since v1: - patch [2/3] is new. I had to reuse a piece of code that was already duplicated in the driver, so I factorized the code. - Make ffs_dma_resv_lock() static - Add MODULE_IMPORT_NS(DMA_BUF); - The attach/detach functions are now performed without locking the eps_lock spinlock. The transfer function starts with the spinlock unlocked, then locks it before allocating and queueing the USB transfer.
Cheers, -Paul
Paul Cercueil (3): usb: gadget: Support already-mapped DMA SGs usb: gadget: functionfs: Factorize wait-for-endpoint code usb: gadget: functionfs: Add DMABUF import interface
drivers/usb/gadget/function/f_fs.c | 467 ++++++++++++++++++++++++++-- drivers/usb/gadget/udc/core.c | 7 +- include/linux/usb/gadget.h | 2 + include/uapi/linux/usb/functionfs.h | 14 +- 4 files changed, 468 insertions(+), 22 deletions(-)