On Sat, May 19, 2007 07:35, Jeff Garzik wrote: > > Since Alan expressed a desire to see Large Block Transfer (LBT) support > in pata_sil680, I though I would re-post my patch for adding LBT support > to sata_sil. > > Silicon Image's Large Block Transfer (LBT) support is a vendor-specific > DMA scatter/gather engine, which enables 64-bit DMA addresses (where > supported by platform) and eliminates the annoying 64k DMA boundary > found in legacy PCI IDE BMDMA engines. > > This hardware is open hardware. Docs for both PATA and SATA can be > found at http://gkernel.sourceforge.net/specs/sii/ > > LBT support works the same way in both pata_sil680 and sata_sil, so > maybe a motivated individual could take use this patch as an inspiration > for doing the same thing with pata_sil680. > > NOTE: This patch works for me on x86 and x86-64. However, other > testers reported problems, which is why it is not upstream. This patch seems to work with my SiI 3512, though I don't notice any difference, neither a speedup, nor a slowdown. Hdparm gives the same speeds (-tT), and cp -a'ing kernel sources is abysmal slow in both cases, (need to look into that one) so I didn't really test it that well. Greetings, Indan - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
