On Tue, Mar 03, 2015 at 10:21:55AM +0000, Hans Petter Selasky wrote: > Author: hselasky > Date: Tue Mar 3 10:21:54 2015 > New Revision: 279563 > URL: https://svnweb.freebsd.org/changeset/base/279563 > > Log: > Add quirk for USB 3.0 controllers which don't support 64-bit DMA. >
Hrm, this is strange; I checked Linux sources when adding 64-bit DMA support and while they handle tons of quirks for USB controllers (which FreeBSD doesn't), they don't have a single such exception for 64-bit DMA. Are you sure using 64-bit DMA doesn't just reveal another problem? F. e., Linux issues an extra doorbell ring for XHCI_NEC_HOST and generally reads back the doorbell register in order to flush PCI writes. Marius _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
