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| author | Shaohua Li <shli@fb.com> | 2015-01-15 17:32:27 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-23 14:19:04 -0700 |
| commit | 12cb5ce101abfaf74421f8cc9f196e708209eb79 (patch) | |
| tree | c30f73bca31bacf234398535ef500dcdb4ac4f09 /include/linux/libata.h | |
| parent | a4a1cc16a72fd957b4cc2bda12479117f5bec8f8 (diff) | |
| download | linux-12cb5ce101abfaf74421f8cc9f196e708209eb79.tar.gz linux-12cb5ce101abfaf74421f8cc9f196e708209eb79.tar.bz2 linux-12cb5ce101abfaf74421f8cc9f196e708209eb79.zip | |
libata: use blk taging
libata uses its own tag management which is duplication and the
implementation is poor. And if we switch to blk-mq, tag is build-in.
It's time to switch to generic taging.
The SAS driver has its own tag management, and looks we can't directly
map the host controler tag to SATA tag. So I just bypassed the SAS case.
I changed the code/variable name for the tag management of libata to
make it self contained. Only sas will use it. Later if libsas implements
its tag management, the tag management code in libata can be deleted
easily.
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 2d182413b1db..f23454762717 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -821,10 +821,10 @@ struct ata_port { unsigned int cbl; /* cable type; ATA_CBL_xxx */ struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; - unsigned long qc_allocated; + unsigned long sas_tag_allocated; /* for sas tag allocation only */ unsigned int qc_active; int nr_active_links; /* #links with active qcs */ - unsigned int last_tag; /* track next tag hw expects */ + unsigned int sas_last_tag; /* track next tag hw expects */ struct ata_link link; /* host default link */ struct ata_link *slave_link; /* see ata_slave_link_init() */ @@ -1344,6 +1344,7 @@ extern struct device_attribute *ata_common_sdev_attrs[]; .ioctl = ata_scsi_ioctl, \ .queuecommand = ata_scsi_queuecmd, \ .can_queue = ATA_DEF_QUEUE, \ + .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ .this_id = ATA_SHT_THIS_ID, \ .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ .emulated = ATA_SHT_EMULATED, \ |