On Mon, Apr 4, 2016 at 4:47 PM, Hannes Reinecke <hare@xxxxxxx> wrote:
> ZAC drives implement a 'zac management out' command template,
> which maps onto the ZBC OUT command.
>
> Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
> ---
> drivers/ata/libata-eh.c | 1 +
> drivers/ata/libata-scsi.c | 73 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/ata.h | 7 +++++
> include/trace/events/libata.h | 1 +
> 4 files changed, 82 insertions(+)
>
> diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
> index e947bd5..ee984f9 100644
> --- a/drivers/ata/libata-eh.c
> +++ b/drivers/ata/libata-eh.c
> @@ -2481,6 +2481,7 @@ const char *ata_get_cmd_descript(u8 command)
> { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" },
> { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" },
> { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" },
> + { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" },
> { ATA_CMD_READ_LONG, "READ LONG (with retries)" },
> { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" },
> { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" },
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index 21c2b40..6db2aaf 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -3451,6 +3451,76 @@ invalid_param_len:
> return 1;
> }
>
> +static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
> +{
> + struct ata_taskfile *tf = &qc->tf;
> + struct scsi_cmnd *scmd = qc->scsicmd;
> + struct ata_device *dev = qc->dev;
> + const u8 *cdb = scmd->cmnd;
> + u8 reset_all, sa;
> + u64 block;
> + u32 n_block;
> + u16 fp = (u16)-1;
> +
> + if (unlikely(scmd->cmd_len < 16)) {
> + fp = 15;
> + goto invalid_fld;
> + }
> +
> + /*
> + * The service action definition got moved from
> + * 0x00 to 0x04 with zbc-r02, so accept both.
> + */
> + sa = cdb[1] & 0x1f;
> + /* Compatibility with ZBC r01 */
> + if (!sa)
> + sa = ZO_RESET_WRITE_POINTER;
I think we can support the remaining zone commands here:
if (!(sa == ZO_CLOSE_ZONE || sa == ZO_FINISH_ZONE ||
sa == ZO_OPEN_ZONE || sa == ZO_RESET_WRITE_POINTER)) {
...
> + if (sa != ZO_RESET_WRITE_POINTER) {
> + fp = 1;
> + goto invalid_fld;
> + }
> +
> + scsi_16_lba_len(cdb, &block, &n_block);
> + if (n_block) {
> + /*
> + * ZAC MANAGEMENT OUT doesn't define any length
> + */
> + goto invalid_param_len;
> + }
> + if (block > dev->n_sectors)
> + goto out_of_range;
> +
> + reset_all = cdb[14] & 0x1;
> +
> + tf->protocol = ATA_PROT_NODATA;
> + tf->command = ATA_CMD_ZAC_MGMT_OUT;
> + tf->feature = sa;
> + tf->hob_feature = reset_all & 0x1;
> +
> + tf->lbah = (block >> 16) & 0xff;
> + tf->lbam = (block >> 8) & 0xff;
> + tf->lbal = block & 0xff;
> + tf->hob_lbah = (block >> 40) & 0xff;
> + tf->hob_lbam = (block >> 32) & 0xff;
> + tf->hob_lbal = (block >> 24) & 0xff;
> + tf->device = ATA_LBA;
> + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
> +
> + return 0;
> +
> + invalid_fld:
> + ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
> + return 1;
> + out_of_range:
> + /* "Logical Block Address out of range" */
> + ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
> + return 1;
> +invalid_param_len:
> + /* "Parameter list length error" */
> + ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
> + return 1;
> +}
> +
> /**
> * ata_mselect_caching - Simulate MODE SELECT for caching info page
> * @qc: Storage for translated ATA taskfile
> @@ -3767,6 +3837,9 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
> case ZBC_IN:
> return ata_scsi_zbc_in_xlat;
>
> + case ZBC_OUT:
> + return ata_scsi_zbc_out_xlat;
> +
> case START_STOP:
> return ata_scsi_start_stop_xlat;
> }
> diff --git a/include/linux/ata.h b/include/linux/ata.h
> index 2e4a6af..eef9d80 100644
> --- a/include/linux/ata.h
> +++ b/include/linux/ata.h
> @@ -302,6 +302,7 @@ enum {
> ATA_CMD_REQ_SENSE_DATA = 0x0B,
> ATA_CMD_SANITIZE_DEVICE = 0xB4,
> ATA_CMD_ZAC_MGMT_IN = 0x4A,
> + ATA_CMD_ZAC_MGMT_OUT = 0x9F,
>
> /* marked obsolete in the ATA/ATAPI-7 spec */
> ATA_CMD_RESTORE = 0x10,
> @@ -313,6 +314,12 @@ enum {
> /* Subcmds for ATA_CMD_ZAC_MGMT_IN */
> ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES = 0x00,
>
> + /* Subcmds for ATA_CMD_ZAC_MGMT_OUT */
> + ATA_SUBCMD_ZAC_MGMT_OUT_CLOSE_ZONE = 0x01,
> + ATA_SUBCMD_ZAC_MGMT_OUT_FINISH_ZONE = 0x02,
> + ATA_SUBCMD_ZAC_MGMT_OUT_OPEN_ZONE = 0x03,
> + ATA_SUBCMD_ZAC_MGMT_OUT_RESET_WRITE_POINTER = 0x04,
> +
> /* READ_LOG_EXT pages */
> ATA_LOG_SATA_NCQ = 0x10,
> ATA_LOG_NCQ_SEND_RECV = 0x13,
> diff --git a/include/trace/events/libata.h b/include/trace/events/libata.h
> index 02ec4e5..24dcd43 100644
> --- a/include/trace/events/libata.h
> +++ b/include/trace/events/libata.h
> @@ -98,6 +98,7 @@
> ata_opcode_name(ATA_CMD_REQ_SENSE_DATA), \
> ata_opcode_name(ATA_CMD_SANITIZE_DEVICE), \
> ata_opcode_name(ATA_CMD_ZAC_MGMT_IN), \
> + ata_opcode_name(ATA_CMD_ZAC_MGMT_OUT), \
> ata_opcode_name(ATA_CMD_RESTORE), \
> ata_opcode_name(ATA_CMD_READ_LONG), \
> ata_opcode_name(ATA_CMD_READ_LONG_ONCE), \
> --
> 1.8.5.6
>
--
Shaun Tancheff
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