What's the largest practical bulk transfer size in the -8 USB stack? I'm currently transferring frames through a UE_BULK pipe from a Mightex camera (it uses bulk, not isochronous.)
Currently, I'm setting usbd_xfer_max_len(xfer)==32768. If I could set it large enough for a complete frame (5 MB), it would simplify the logic of my driver. Large transfers didn't work reliably with the -7 USB stack, because of some obscure problem with setting up DMA transfers in the ehci driver with more than a few separate physical regions.
-- Trevor Blackwell 650 776 7870 t...@tlb.org _______________________________________________ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
