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libata: support concurrent positioning ranges log

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Add support to discover if an ATA device supports the Concurrent
Positioning Ranges data log (address 0x47), indicating that the device
is capable of seeking to multiple different locations in parallel using
multiple actuators serving different LBA ranges.

Also add support to translate the concurrent positioning ranges log
into its equivalent Concurrent Positioning Ranges VPD page B9h in
libata-scsi.c.

The format of the Concurrent Positioning Ranges Log is defined in ACS-5
r9.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20211027022223.183838-4-damien.lemoal@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal
2021-10-27 11:22:21 +09:00
committed by Jens Axboe
parent e815d36548
commit fe22e1c2f7
4 changed files with 110 additions and 11 deletions
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1
include/linux/ata.h
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@@ -329,6 +329,7 @@ enum {
ATA_LOG_SECURITY = 0x06,
ATA_LOG_SATA_SETTINGS = 0x08,
ATA_LOG_ZONED_INFORMATION = 0x09,
ATA_LOG_CONCURRENT_POSITIONING_RANGES = 0x47,
/* Identify device SATA settings log:*/
ATA_LOG_DEVSLP_OFFSET = 0x30,