Inside drivers/ata/libata-scsi.c:
if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
/* Newer devices support queued TRIM commands */
tf->protocol = ATA_PROT_NCQ;
tf->command = ATA_CMD_FPDMA_SEND;
tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
tf->nsect = qc->tag << 3;
tf->hob_feature = (size / 512) >> 8;
tf->feature = size / 512;
tf->auxiliary = 1;
} else {
so perhaps following the command mentioned above (decode the macro first)
you can issue the command to the SATA drive?
I know the specs are difficult to read, but nonetheless, as I skim through
it, it seemed quite detailed and potentially can be used to construct the
command properly:
https://www.google.com.sg/search?q=site%3At13.org+queued+trim
On Wednesday, April 2, 2014 1:21:07 PM UTC+8, ll...@storvisor.com wrote:
>
> Any one could point to a document or sample code?
>
> Thanks, Lei
>
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