On 07/11/2014 06:08, Martin K. Petersen wrote:
> The whitelist is only meant as a starting point and is by no means
> comprehensive:
>
> - All intel SSD models except for 510
> - Micron M5*
> - Samsung SSDs
> - Seagate SSDs
>
> Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
> ---
> drivers/ata/libata-core.c | 18 ++++++++++++++----
> drivers/ata/libata-scsi.c | 10 ++++++----
> include/linux/libata.h | 1 +
> 3 files changed, 21 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index c5ba15af87d3..f41f24a8bc21 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -4225,10 +4225,20 @@ static const struct ata_blacklist_entry
> ata_device_blacklist [] = {
> { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
>
> /* devices that don't properly handle queued TRIM commands */
> - { "Micron_M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
> - { "Crucial_CT???M500SSD*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
> - { "Micron_M550*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
> - { "Crucial_CT*M550SSD*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
> + { "Micron_M5?0*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
> + ATA_HORKAGE_ZERO_AFTER_TRIM, },
> + { "Crucial_CT???M5?0SSD*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, },
I have a Crucial_CT256MX1 (i.e. MX100) and it does reliably zero.
BTW. it's the same hardware as the M550, so probably the same set of
quirks should apply to both.
Paolo
> +
> + /*
> + * DRAT/RZAT are weak guarantees. Explicitly black/whitelist
> + * SSDs that provide reliable zero after TRIM.
> + */
> + { "INTEL*SSDSC2MH*", NULL, 0, }, /* Blacklist intel 510 */
> + { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
> + { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
> + { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
> + { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
> + { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
>
> /*
> * Some WD SATA-I drives spin up and down erratically when the link
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index 0586f66d70fa..deaa6e34ed4d 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -2515,13 +2515,15 @@ static unsigned int ata_scsiop_read_cap(struct
> ata_scsi_args *args, u8 *rbuf)
> rbuf[15] = lowest_aligned;
>
> if (ata_id_has_trim(args->id)) {
> - rbuf[14] |= 0x80; /* TPE */
> + rbuf[14] |= 0x80; /* LBPME */
>
> - if (ata_id_has_zero_after_trim(args->id))
> - rbuf[14] |= 0x40; /* TPRZ */
> + if (ata_id_has_zero_after_trim(args->id) &&
> + dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
> + ata_dev_warn(dev, "Enabling
> discard_zeroes_data\n");
> + rbuf[14] |= 0x40; /* LBPRZ */
> + }
> }
> }
> -
> return 0;
> }
>
> diff --git a/include/linux/libata.h b/include/linux/libata.h
> index bd5fefeaf548..45ac825b8366 100644
> --- a/include/linux/libata.h
> +++ b/include/linux/libata.h
> @@ -421,6 +421,7 @@ enum {
> ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
> ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
> ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
> + ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
>
> /* DMA mask for user DMA control: User visible values; DO NOT
> renumber */
>
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