Re: [parisc-linux] Re: 2.6.4-rc1-pa3 siimage/NS87415 IDE progess (and another mystery)!

["M. Grabert" <xam@cs.ucc.ie>]

On Sun, Jul 11, 2004 at 04:34:39PM -0700, Randolph Chung wrote:

> > don't have an IDE drive to try it with, but if it works, shouldn't it be
> > done as a pcibios fixup instead? We already have a fixup routine in
> > drivers/parisc/superio.c:superio_fixup_pci(), so you can probably just
> > add it there.
> 
> i.e. (the progif write was removed since it's redundant):
> 
> Index: drivers/parisc/superio.c
> ===================================================================
> RCS file: /var/cvs/linux-2.6/drivers/parisc/superio.c,v
> retrieving revision 1.9
> diff -u -p -r1.9 superio.c
> --- drivers/parisc/superio.c	18 May 2004 13:08:56 -0000	1.9
> +++ drivers/parisc/superio.c	11 Jul 2004 23:33:06 -0000
> @@ -482,6 +482,16 @@ void superio_fixup_pci(struct pci_dev *p
>  	pci_write_config_byte(pdev, PCI_CLASS_PROG, pdev->class);
>  
>  	pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
> +
> +	/* IODC clobbers the CTRL registers with:
> +	 * CTRL1 = 0xf0 = "ATAPI buffer mode (no prefetching)" for everyone
> +	 * CTRL2 = 0x03 = mask chan1/2 interrupts
> +	 * CTRL3 = 0x00 = "disable prefetch buffer"/"Master Wait States"
> +	 */
> +	pci_write_config_byte(pdev, 0x40, 0xf0); /* IDE_CTRL1 */
> +	pci_write_config_byte(pdev, 0x41, 0x00); /* IDE_CTRL2 */
> +	pci_write_config_byte(pdev, 0x42, 0x00); /* IDE_CTRL3 */
> +
>  	printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog);
>  }
>  
> 
> works fine on my c3750 with a cdrom drive too! Great job Grant :)

Tested above patch, but unfortunately it didn't work for me,
the NS87415 still doesn't use DMA (or so it seems, at least it's
still the 3MB/s instead of the expected 30-40MB/s).

hdparm -c /dev/hda showed DMA was turned on, and I even set it on
again (hdparm -c 1), just to be sure, but it didn't make any
difference in performance :(

Thanks,
   Max


PS: shall I try Grant's patch aswell?
_______________________________________________
parisc-linux mailing list
parisc-linux@lists.parisc-linux.org
http://lists.parisc-linux.org/mailman/listinfo/parisc-linux