Messages in this thread | | | From | Logan Gunthorpe <> | Date | Wed, 29 Nov 2017 10:58:02 -0700 | Subject | Re: [PATCH 0/7] Switchtec NTB Crosslink Support |
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Also, I forgot to mention, this patch set is based on today's ntb-next.
Logan
On 29/11/17 10:55 AM, Logan Gunthorpe wrote: > Hi, > > This patch series adds support for the Switchtec Crosslink feature. > Crosslink is similar to B2B in that it allows two switches to be > connected back to back. > > Two switches can already be connected between two hosts, however with this > setup, there would be no symmetry as one switch would handle NTB and the > other would just need to be a single partition switch. Our customers are > looking for a completely symmetric solution such that a host or switch > can be easily replaced without needing to worry about which half was > replaced. > > Crosslink solves this problem by having each of the switches configured > with two partitions. This results in a special host-less partition in > the middle of the connection which can be managed in such a way as > to forward all the traffic and still provide all the same NTB > functionality. In this way, both hosts and switches can be identical. > > Please see Patch 6 for a bit more detailed description of how Crosslink > works. > > Thanks, > > Logan > > Kelvin Cao (1): > ntb_hw_switchtec: Allow using Switchtec NTB in multi-partition setups > > Logan Gunthorpe (6): > ntb_hw_switchtec: Keep track of the number of LUT windows used by the > driver > ntb_hw_switchtec: Create helper function to setup reserved LUT MWs > ntb_hw_switchtec: Make switchtec_ntb_init_req_id_table() more general > ntb_hw_switchtec: Expand PFF CSR registers > ntb_hw_switchtec: Add initialization code for crosslink > ntb_hw_switchtec: Crosslink doorbells and messages > > drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 494 +++++++++++++++++++++++++++------ > include/linux/ntb.h | 15 +- > include/linux/switchtec.h | 23 +- > 3 files changed, 435 insertions(+), 97 deletions(-) > > -- > 2.11.0 >
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