Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752138AbdF2D1g (ORCPT ); Wed, 28 Jun 2017 23:27:36 -0400 Received: from ale.deltatee.com ([207.54.116.67]:48979 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751745AbdF2D1E (ORCPT ); Wed, 28 Jun 2017 23:27:04 -0400 From: Logan Gunthorpe To: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jon Mason , Dave Jiang , Allen Hubbe , Bjorn Helgaas , Greg Kroah-Hartman , Kurt Schwemmer , Stephen Bates , Serge Semin , Logan Gunthorpe Date: Wed, 28 Jun 2017 21:26:48 -0600 Message-Id: <20170629032648.3073-17-logang@deltatee.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170629032648.3073-1-logang@deltatee.com> References: <20170629032648.3073-1-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, jdmason@kudzu.us, dave.jiang@intel.com, Allen.Hubbe@emc.com, bhelgaas@google.com, gregkh@linuxfoundation.org, kurt.schwemmer@microsemi.com, sbates@raithlin.com, fancer.lancer@gmail.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH 16/16] switchtec_ntb: update switchtec documentation with notes for ntb X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1255 Lines: 32 The switchtec_ntb driver has a couple requirements on the switchec's hardware configuration so we add these notes to the documentation. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer --- Documentation/switchtec.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/switchtec.txt b/Documentation/switchtec.txt index a0a9c7b3d4d5..978a346e1fb3 100644 --- a/Documentation/switchtec.txt +++ b/Documentation/switchtec.txt @@ -78,3 +78,15 @@ The following IOCTLs are also supported by the device: between PCI Function Framework number (used by the event system) and Switchtec Logic Port ID and Partition number (which is more user friendly). + + +Non-Transparent Bridge (NTB) Driver +=================================== + +An NTB driver is provided for the switchtec hardware in switchec_ntb. +Currently, it only supports switches configured with exactly 2 +partitions. It also requires the following configuration settings: + +* Both partitions must be able to access each other's GAS spaces. + Thus, the bits in the GAS Access Vector under Management Settings + must be set to support this. -- 2.11.0