nvme-pci: implement host memory buffer support

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If a controller supports the host memory buffer we try to provide
it with the requested size up to an upper cap set as a module
parameter.  We try to give as few as possible descriptors, eventually
working our way down.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>

...

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Christoph Hellwig 2017-05-12 17:02:58 +02:00

parent fe6d53c9c0

commit 87ad72a59a

1 changed files with 187 additions and 2 deletions

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drivers/nvme/host/pci.c

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