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| author |   Damien Le Moal <damien.lemoal@wdc.com> | 2021-10-27 11:22:21 +0900 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-10-26 21:01:48 -0600 |
| commit | fe22e1c2f705676a705d821301fc52eecc2fe055 (patch) | |
| tree | fd5bb0559cd46fc9de5f5ff2986344fe702e777a /include/linux/libata.h | |
| parent | scsi: sd: add concurrent positioning ranges support (diff) | |
| download | linux-dev-fe22e1c2f705676a705d821301fc52eecc2fe055.tar.xz linux-dev-fe22e1c2f705676a705d821301fc52eecc2fe055.zip | |
libata: support concurrent positioning ranges log
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>
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index c0c64f03e107..236ec689056a 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -676,6 +676,18 @@ struct ata_ering { struct ata_ering_entry ring[ATA_ERING_SIZE]; }; +struct ata_cpr { + u8 num; + u8 num_storage_elements; + u64 start_lba; + u64 num_lbas; +}; + +struct ata_cpr_log { + u8 nr_cpr; + struct ata_cpr cpr[]; +}; + struct ata_device { struct ata_link *link; unsigned int devno; /* 0 or 1 */ @@ -735,6 +747,9 @@ struct ata_device { u32 zac_zones_optimal_nonseq; u32 zac_zones_max_open; + /* Concurrent positioning ranges */ + struct ata_cpr_log *cpr_log; + /* error history */ int spdn_cnt; /* ering is CLEAR_END, read comment above CLEAR_END */ |