3 commits

Author	SHA1	Message	Date
Ruslan Bukin	0c340d7ed9	Negate the logic of XCHAN_CAP_NOBUFS macro and rename it to ... XCHAN_CAP_BOUNCE. The only application that uses bounce buffering for now is the Government Furnished Equipment (GFE) P2's dma core (AXIDMA) with its own dedicated cacheless bounce buffer. Sponsored by: DARPA, AFRL	2019-07-04 14:04:08 +00:00
Ruslan Bukin	5a51e5e49d	o Rewrite softdma_process_tx() of Altera SoftDMA engine driver ... so it does not require a bounce buffer. The only need for this was to align the buffer address. Implement unaligned access and we don't need to copy data twice. o Remove contigmalloc-based bounce buffer from xDMA code since it is not suitable for arbitrary memory provided by platform, which is sometimes a dedicated piece of memory that is not managed by OS at all. Sponsored by: DARPA, AFRL	2019-04-29 16:27:15 +00:00
Ruslan Bukin	8f89e7db08	Add driver for Altera SoftDMA® device. ... SoftDMA is a software implementation of DMA engine built using Altera FIFO component. Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9620	2018-04-13 14:18:04 +00:00