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blk-mq: Allow PCI vector offset for mapping queues

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The PCI interrupt vectors intended to be associated with a queue may
not start at 0; a driver may allocate pre_vectors for special use. This
patch adds an offset parameter so blk-mq may find the intended affinity
mask and updates all drivers using this API accordingly.

Cc: Don Brace <don.brace@microsemi.com>
Cc: <qla2xxx-upstream@qlogic.com>
Cc: <linux-scsi@vger.kernel.org>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2018-03-27 09:39:06 -06:00 • committed by Jens Axboe
parent 3148ffbdb9
commit f23f5bece6
5 changed files with 9 additions and 6 deletions
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3
include/linux/blk-mq-pci.h
View file

@ -5,6 +5,7 @@
struct blk_mq_tag_set;
struct pci_dev;
int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev);
int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev,
int offset);
#endif /* _LINUX_BLK_MQ_PCI_H */