Hi Dan,
tf->nsect can not be calculated from user space: the tag must be
calculated by the driver.
Gwendal.
On Tue, May 19, 2009 at 11:11 AM, Dan Porat <dan.porat@xxxxxxxxx> wrote:
> As I have seen sg_io does not support NCQ in ATA passthrough.
> will changing the mapping function libata-scsi.c (line 2745) , work?
>
> If not , how else can I check the protocol (FPDMA) ?
> static u8
> 2725ata_scsi_map_proto(u8 byte1)
> 2726{
> 2727 switch((byte1 & 0x1e) >> 1) {
> 2728 case 3: /* Non-data */
> 2729 return ATA_PROT_NODATA;
> 2730
> 2731 case 6: /* DMA */
> 2732 case 10: /* UDMA Data-in */
> 2733 case 11: /* UDMA Data-Out */
> 2734 return ATA_PROT_DMA;
> 2735
> 2736 case 4: /* PIO Data-in */
> 2737 case 5: /* PIO Data-out */
> 2738 return ATA_PROT_PIO;
> 2739
> 2745 case 12: /* FPDMA */
> return ATA_PROT_NCQ
> 2740 case 0: /* Hard Reset */
> 2741 case 1: /* SRST */
> 2742 case 8: /* Device Diagnostic */
> 2743 case 9: /* Device Reset */
> 2744 case 7: /* DMA Queued */
>
> 2746 case 15: /* Return Response Info */
> 2747 default: /* Reserved */
> 2748 break;
> 2749 }
> 2750
> 2751 return ATA_PROT_UNKNOWN;
> 2752}
>
>
>
> Thanks
>
> Dan Porat
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