From: Laurentiu Tudor <laurentiu.tudor@xxxxxxx> For HCs that have local memory, replace the current DMA API usage with a genalloc generic allocator to manage the mappings for these devices. This is in preparation for dropping the existing "coherent" dma mem declaration APIs. Current implementation was relying on a short circuit in the DMA API that in the end, was acting as an allocator for these type of devices. Only compiled tested, so any volunteers willing to test are most welcome. Thank you! For context, see thread here: https://lkml.org/lkml/2019/4/22/357 Changes in v4: - created mapping for local mem - fix genalloc misuse Changes in v3: - rearranged calls into genalloc simplifying the code a bit (Christoph) - dropped RFC prefix Changes in v2: - use genalloc also in core usb (based on comment from Robin) - moved genpool decl to usb_hcd to be accesible from core usb Laurentiu Tudor (3): USB: use genalloc for USB HCs with local memory usb: host: ohci-sm501: init genalloc for local memory usb: host: ohci-tmio: init genalloc for local memory drivers/usb/core/buffer.c | 15 +++++--- drivers/usb/host/ohci-hcd.c | 23 +++++++++--- drivers/usb/host/ohci-sm501.c | 66 +++++++++++++++++++++-------------- drivers/usb/host/ohci-tmio.c | 32 ++++++++++++----- include/linux/usb/hcd.h | 3 ++ 5 files changed, 95 insertions(+), 44 deletions(-) -- 2.17.1
