From mboxrd@z Thu Jan 1 00:00:00 1970 From: logang@deltatee.com (Logan Gunthorpe) Date: Wed, 2 May 2018 09:56:09 -0600 Subject: [PATCH v4 00/14] Copy Offload in NVMe Fabrics with P2P PCI Memory In-Reply-To: References: <20180423233046.21476-1-logang@deltatee.com> Message-ID: <805645c1-ea40-2e57-88eb-5dd34e579b2e@deltatee.com> Hi Christian, On 5/2/2018 5:51 AM, Christian K?nig wrote: > it would be rather nice to have if you could separate out the functions > to detect if peer2peer is possible between two devices. This would essentially be pci_p2pdma_distance() in the existing patchset. It returns the sum of the distance between a list of clients and a P2PDMA provider. It returns -1 if peer2peer is not possible between the devices (presently this means they are not behind the same root port). Logan