From: Bjorn Helgaas <helgaas@kernel.org>
To: Logan Gunthorpe <logang@deltatee.com>
Cc: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, Jon Mason <jdmason@kudzu.us>,
Dave Jiang <dave.jiang@intel.com>,
Allen Hubbe <Allen.Hubbe@emc.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kurt Schwemmer <kurt.schwemmer@microsemi.com>,
Stephen Bates <sbates@raithlin.com>,
Serge Semin <fancer.lancer@gmail.com>
Subject: Re: [PATCH v3 12/16] switchtec_ntb: add link management
Date: Mon, 31 Jul 2017 15:27:00 -0500 [thread overview]
Message-ID: <20170731202700.GE9303@bhelgaas-glaptop.roam.corp.google.com> (raw)
In-Reply-To: <20170725205753.4735-13-logang@deltatee.com>
On Tue, Jul 25, 2017 at 02:57:49PM -0600, Logan Gunthorpe wrote:
> switchtec_ntb checks for a link by looking at the shared memory
> window. If the magic number is correct and the otherside indicates
> their link is enabled then we take the link to be up.
>
> Whenever we change our local link status we send a msg to the
> otherside to check whether it's up and change their status.
s/otherside/other side/ (twice)
> The current status is maintained in a flag so ntb_is_link_up
> can return quickly.
>
> We utilize Switchtec's link status notifier to also check link changes
> when the switch notices a port changes state.
next prev parent reply other threads:[~2017-07-31 20:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 20:57 [PATCH v3 00/16] Switchtec NTB Support Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 01/16] switchtec: move structure definitions into a common header Logan Gunthorpe
2017-07-31 20:15 ` Bjorn Helgaas
2017-07-31 20:51 ` Logan Gunthorpe
2017-07-31 22:50 ` Bjorn Helgaas
2017-07-25 20:57 ` [PATCH v3 02/16] switchtec: export class symbol for use in upper layer driver Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 03/16] switchtec: add NTB hardware register definitions Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 04/16] switchtec: add link event notifier callback Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 05/16] ntb: ntb_test: ensure the link is up before trying to configure the mws Logan Gunthorpe
2017-08-01 18:07 ` Jon Mason
2017-08-01 18:09 ` Logan Gunthorpe
2017-08-01 18:16 ` Jon Mason
2017-08-01 18:19 ` Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 06/16] ntb: ensure ntb_mw_get_align() is only called when the link is up Logan Gunthorpe
2017-07-31 20:16 ` Bjorn Helgaas
2017-08-01 18:14 ` Jon Mason
2017-08-01 18:17 ` Logan Gunthorpe
2017-08-01 18:28 ` Jon Mason
2017-07-25 20:57 ` [PATCH v3 07/16] ntb: add check and comment for link up to mw_count() and mw_get_align() Logan Gunthorpe
2017-08-01 18:11 ` Jon Mason
2017-07-25 20:57 ` [PATCH v3 08/16] switchtec_ntb: introduce initial NTB driver Logan Gunthorpe
2017-07-31 23:08 ` Dave Jiang
2017-07-25 20:57 ` [PATCH v3 09/16] switchtec_ntb: initialize hardware for memory windows Logan Gunthorpe
2017-07-31 20:25 ` Bjorn Helgaas
2017-08-01 18:55 ` Jon Mason
2017-07-25 20:57 ` [PATCH v3 10/16] switchtec_ntb: initialize hardware for doorbells and messages Logan Gunthorpe
2017-07-31 20:26 ` Bjorn Helgaas
2017-07-25 20:57 ` [PATCH v3 11/16] switchtec_ntb: add skeleton NTB driver Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 12/16] switchtec_ntb: add link management Logan Gunthorpe
2017-07-31 20:27 ` Bjorn Helgaas [this message]
2017-07-25 20:57 ` [PATCH v3 13/16] switchtec_ntb: implement doorbell registers Logan Gunthorpe
2017-08-01 18:59 ` Jon Mason
2017-07-25 20:57 ` [PATCH v3 14/16] switchtec_ntb: implement scratchpad registers Logan Gunthorpe
2017-08-01 19:10 ` Jon Mason
2017-08-01 22:26 ` Logan Gunthorpe
2017-08-02 13:06 ` Allen Hubbe
2017-08-02 13:06 ` Allen Hubbe
2017-08-02 16:32 ` Jon Mason
2017-08-02 17:02 ` Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 15/16] switchtec_ntb: add memory window support Logan Gunthorpe
2017-07-25 20:57 ` [PATCH v3 16/16] switchtec_ntb: update switchtec documentation with notes for NTB Logan Gunthorpe
2017-07-26 13:09 ` [PATCH v3 00/16] Switchtec NTB Support Allen Hubbe
2017-07-26 13:09 ` Allen Hubbe
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