nvme-pci: Add support for P2P memory in requests

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For P2P requests, we must use the pci_p2pmem_map_sg() function instead of
the dma_map_sg functions.

With that, we can then indicate PCI_P2P support in the request queue.  For
this, we create an NVME_F_PCI_P2P flag which tells the core to set
QUEUE_FLAG_PCI_P2P in the request queue.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>

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This commit is contained in:

Logan Gunthorpe 2018-10-04 15:27:44 -06:00 • committed by Bjorn Helgaas

parent 0f238ff5cc

commit e0596ab290

3 changed files with 18 additions and 4 deletions

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4

drivers/nvme/host/core.c

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1

drivers/nvme/host/nvme.h

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17

drivers/nvme/host/pci.c

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