On Thu, Sep 19, 2019 at 11:59:11AM +0200, Alexander Gordeev wrote: > The Avalon-MM DMA Interface for PCIe is a design found in hard IPs for > Intel Arria, Cyclone or Stratix FPGAs. It transfers data between on-chip > memory and system memory. This RFC is an attempt to provide a generic API: > > typedef void (*avalon_dma_xfer_callback)(void *dma_async_param); > > int avalon_dma_submit_xfer( > struct avalon_dma *avalon_dma, > enum dma_data_direction direction, > dma_addr_t dev_addr, dma_addr_t host_addr, > unsigned int size, > avalon_dma_xfer_callback callback, > void *callback_param); > > int avalon_dma_submit_xfer_sg(struct avalon_dma *avalon_dma, > enum dma_data_direction direction, > dma_addr_t dev_addr, > struct sg_table *sg_table, > avalon_dma_xfer_callback callback, > void *callback_param); > > int avalon_dma_issue_pending(struct avalon_dma *avalon_dma); > > Patch 1 introduces "avalon-dma" driver that provides the above-mentioned > generic interface. > > Patch 2 adds "avalon-drv" driver using "avalon-dma" to transfer user- > provided data. This driver was used to debug and stress "avalon-dma" > and could be used as a code base for other implementations. Strictly > speaking, it does not need to be part of the kernel tree. > A companion tool using "avalon-drv" to DMA files (not part of this > patchset) is located at git@xxxxxxxxxx:a-gordeev/avalon-drv-tool.git > > The suggested interface is developed with the standard "dmaengine" > in mind and could be reworked to suit it. I would appreciate, however > gathering some feedback on the implemenation first - as the hardware- > specific code would persist. It is also a call for testing - I only > have access to a single Arria 10 device to try on. > > This series is against v5.3 and could be found at > git@xxxxxxxxxx:a-gordeev/linux.git avalon-dma-engine Why is this being submitted for drivers/staging/ and not the "real" part of the kernel tree? All staging code must have a TODO file listing what needs to be done in order to get it out of staging, and be self-contained (i.e. no files include/linux/) Please fix that up when resending this series. thanks, greg k-h
