Hello,
On Saturday 25 August 2007, Sergei Shtylyov wrote:
> The Marvell bridge chips used on HighPoint SATA cards do not seem to support
> the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes, so the driver needs
> to account for this in the udma_filter() method. In order to achieve that, do
> the following changes:
>
> - install the method for all chips, not only HPT36x/370 and impove the code
> formatting by killing the extra tabs while at it;
>
> - add to the end of the 'switch' statement in the method cases for HPT372[AN]
> and HPT374 chips upon which the known SATA cards are based;
>
> - use hwif->ultra_mask as a default mask for the ide_dma_filter() method to
> behave correctly;
>
> - move the HPT370[A] cases below the HPT36x case for consistency...
>
> Signed-off-by: Sergei Shtylyov <[email protected]>
>
> ---
> Argh! I've managed to put = instead of &= here and there, so please disregard
> the take #2... :-/
Not to mention that there was already take #2 on Aug 19 2007
(the version of the patch which is currently in IDE quilt tree)...
> This version doesn't use explicit UltraDMA masks, so converting them to the
> ATA_UDMA* is left for another, global patch. This patch against the current
I have already other patches which are based on the previous version of the
patch and I don't find the idea of re-doing them especially tempting...
> Linus' tree and unfortunately I was able to only compile test it since that
> tree gives MODPOST warning and dies early on bootup.
>
> drivers/ide/pci/hpt366.c | 78 ++++++++++++++++++++++++-----------------------
> 1 files changed, 40 insertions(+), 38 deletions(-)
>
> Index: linux-2.6/drivers/ide/pci/hpt366.c
> ===================================================================
> --- linux-2.6.orig/drivers/ide/pci/hpt366.c
> +++ linux-2.6/drivers/ide/pci/hpt366.c
> @@ -1,5 +1,5 @@
> /*
> - * linux/drivers/ide/pci/hpt366.c Version 1.11 Aug 11, 2007
> + * linux/drivers/ide/pci/hpt366.c Version 1.12 Aug 25, 2007
> *
> * Copyright (C) 1999-2003 Andre Hedrick <[email protected]>
> * Portions Copyright (C) 2001 Sun Microsystems, Inc.
> @@ -114,6 +114,7 @@
> * unify HPT36x/37x timing setup code and the speedproc handlers by joining
> * the register setting lists into the table indexed by the clock selected
> * - set the correct hwif->ultra_mask for each individual chip
> + * - add UltraDMA mode filtering for the HPT37[24] based SATA cards
> * Sergei Shtylyov, <[email protected]> or <[email protected]>
> */
>
> @@ -524,36 +525,38 @@ static int check_in_drive_list(ide_drive
(the real) take #2 also updated hpt3xx_udma_filter() comment
> static u8 hpt3xx_udma_filter(ide_drive_t *drive)
> {
> - struct hpt_info *info = pci_get_drvdata(HWIF(drive)->pci_dev);
> - u8 mask;
> + ide_hwif_t *hwif = HWIF(drive);
> + struct hpt_info *info = pci_get_drvdata(hwif->pci_dev);
> + u8 mask = hwif->ultra_mask;
>
> switch (info->chip_type) {
> - case HPT370A:
> - if (!HPT370_ALLOW_ATA100_5 ||
> - check_in_drive_list(drive, bad_ata100_5))
> - return 0x1f;
> - else
> - return 0x3f;
> - case HPT370:
> - if (!HPT370_ALLOW_ATA100_5 ||
> - check_in_drive_list(drive, bad_ata100_5))
> - mask = 0x1f;
> - else
> - mask = 0x3f;
> - break;
> case HPT36x:
> - if (!HPT366_ALLOW_ATA66_4 ||
> + if (HPT366_ALLOW_ATA66_4 &&
> check_in_drive_list(drive, bad_ata66_4))
> - mask = 0x0f;
> - else
> - mask = 0x1f;
> + mask &= ~0x10;
>
> - if (!HPT366_ALLOW_ATA66_3 ||
> + if (HPT366_ALLOW_ATA66_3 &&
> check_in_drive_list(drive, bad_ata66_3))
> - mask = 0x07;
> + mask &= ~0x08;
> break;
> + case HPT370 :
> + case HPT370A:
> + if (HPT370_ALLOW_ATA100_5 &&
> + check_in_drive_list(drive, bad_ata100_5))
> + mask &= ~0x20;
> +
> + if (info->chip_type == HPT370A)
> + return mask;
> + break;
> + case HPT372 :
> + case HPT372A:
> + case HPT372N:
> + case HPT374 :
> + if (ide_dev_is_sata(drive->id))
> + mask &= ~0x0e;
> + /* Fall thru */
> default:
> - return 0x7f;
> + return mask;
> }
I really don't see the advantage of "mask &=" over the previous
code ("mask = ATA_UDMA*") which was just more readable IMO.
I'm staying with (the real) take #2 of this patch for now.
Bart
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