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Thu, 4 Mar 2021 23:05:18 -0600 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 4 Mar 2021 23:05:18 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 4 Mar 2021 23:05:18 -0600 Received: from a0393678-ssd.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12554D9C116197; Thu, 4 Mar 2021 23:05:11 -0600 From: Kishon Vijay Abraham I To: Kishon Vijay Abraham I , Lorenzo Pieralisi , Bjorn Helgaas , Jonathan Corbet , Rob Herring , Arnd Bergmann , Tom Joseph , Jingoo Han , Gustavo Pimentel , Marek Vasut , Yoshihiro Shimoda , Shawn Lin , Heiko Stuebner , Nadeem Athani CC: Greg Kroah-Hartman , , , , , , , , Lokesh Vutla Subject: [PATCH v3 7/7] Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOV Date: Fri, 5 Mar 2021 10:34:10 +0530 Message-ID: <20210305050410.9201-8-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210305050410.9201-1-kishon@ti.com> References: <20210305050410.9201-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210305_050528_581824_D0EF87BA X-CRM114-Status: GOOD ( 13.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add Documentation to help users use PCI endpoint to create virtual functions using configfs. An endpoint function is designated as a virtual endpoint function device when it is linked to a physical endpoint function device (instead of a endpoint controller). Signed-off-by: Kishon Vijay Abraham I --- Documentation/PCI/endpoint/pci-endpoint-cfs.rst | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst index 696f8eeb4738..56fb33c5e8fd 100644 --- a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst +++ b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst @@ -43,6 +43,7 @@ entries corresponding to EPF driver will be created by the EPF core. .. / ... / ... / + ... / .. / ... / ... / @@ -68,6 +69,7 @@ created) ... subsys_vendor_id ... subsys_id ... interrupt_pin + ... / ... primary/ ... / ... secondary/ @@ -79,6 +81,13 @@ interface should be added in 'primary' directory and symlink of endpoint controller connected to secondary interface should be added in 'secondary' directory. +The directory can have a list of symbolic links +() to other . These symbolic links should +be created by the user to represent the virtual functions that are bound to +the physical function. In the above directory structure is a +physical function and is a virtual function. An EPF device once +it's linked to another EPF device, cannot be linked to a EPC device. + EPC Device ========== @@ -98,7 +107,8 @@ entries corresponding to EPC device will be created by the EPC core. The directory will have a list of symbolic links to . These symbolic links should be created by the user to -represent the functions present in the endpoint device. +represent the functions present in the endpoint device. Only +that represents a physical function can be linked to a EPC device. The directory will also have a *start* field. Once "1" is written to this field, the endpoint device will be ready to