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[209.132.180.67]) by mx.google.com with ESMTP id m14si20988116pga.80.2017.04.05.08.59.23; Wed, 05 Apr 2017 08:59:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755128AbdDEP7R (ORCPT + 12 others); Wed, 5 Apr 2017 11:59:17 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:44377 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754962AbdDEIzi (ORCPT ); Wed, 5 Apr 2017 04:55:38 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id v358sK9e031295; Wed, 5 Apr 2017 03:54:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1491382460; bh=bJGc0Va4bKSpifrzdKy7iD2ZaZwLQAHyqvRwJMW5zTY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=pZDCCYTVkvBjUe8lv/YEaxnXd/uVrJJjnSOv1K9/f/ZQ9+pDlzOxPkpa1TNa1yekL drhZhnUkGvxEFy3QEwlUD42y4Hi5p+oAyCW3lfoiRgWD3I2zMreho5+FwdK9SlJaEg 2tOvDUv9qBGz858dFA6KpUYv3Vt5Wkcsa4e1FPdU= Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id v358sKH9007321; Wed, 5 Apr 2017 03:54:20 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.294.0; Wed, 5 Apr 2017 03:54:19 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id v358qri0012909; Wed, 5 Apr 2017 03:54:17 -0500 From: Kishon Vijay Abraham I To: Bjorn Helgaas , Joao Pinto , , , , , , CC: , , Subject: [PATCH v6 21/23] Documentation: PCI: Add userguide for PCI endpoint test function Date: Wed, 5 Apr 2017 14:22:41 +0530 Message-ID: <20170405085243.18123-22-kishon@ti.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170405085243.18123-1-kishon@ti.com> References: <20170405085243.18123-1-kishon@ti.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add documentation to help users use pci-epf-test function driver and pci_endpoint_test host driver for testing PCI. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Bjorn Helgaas --- Documentation/PCI/00-INDEX | 2 + Documentation/PCI/endpoint/pci-test-howto.txt | 179 ++++++++++++++++++++++++++ 2 files changed, 181 insertions(+) create mode 100644 Documentation/PCI/endpoint/pci-test-howto.txt -- 2.11.0 diff --git a/Documentation/PCI/00-INDEX b/Documentation/PCI/00-INDEX index 2fc901a1c32e..00c9a90b6f38 100644 --- a/Documentation/PCI/00-INDEX +++ b/Documentation/PCI/00-INDEX @@ -18,5 +18,7 @@ endpoint/pci-endpoint-cfs.txt - guide to use configfs to configure the PCI endpoint function. endpoint/pci-test-function.txt - specification of *PCI test* function device. +endpoint/pci-test-howto.txt + - userguide for PCI endpoint test function. endpoint/function/binding/ - binding documentation for PCI endpoint function diff --git a/Documentation/PCI/endpoint/pci-test-howto.txt b/Documentation/PCI/endpoint/pci-test-howto.txt new file mode 100644 index 000000000000..75f48c3bb191 --- /dev/null +++ b/Documentation/PCI/endpoint/pci-test-howto.txt @@ -0,0 +1,179 @@ + PCI TEST USERGUIDE + Kishon Vijay Abraham I + +This document is a guide to help users use pci-epf-test function driver +and pci_endpoint_test host driver for testing PCI. The list of steps to +be followed in the host side and EP side is given below. + +1. Endpoint Device + +1.1 Endpoint Controller Devices + +To find the list of endpoint controller devices in the system: + + # ls /sys/class/pci_epc/ + 51000000.pcie_ep + +If PCI_ENDPOINT_CONFIGFS is enabled + # ls /sys/kernel/config/pci_ep/controllers + 51000000.pcie_ep + +1.2 Endpoint Function Drivers + +To find the list of endpoint function drivers in the system: + + # ls /sys/bus/pci-epf/drivers + pci_epf_test + +If PCI_ENDPOINT_CONFIGFS is enabled + # ls /sys/kernel/config/pci_ep/functions + pci_epf_test + +1.3 Creating pci-epf-test Device + +PCI endpoint function device can be created using the configfs. To create +pci-epf-test device, the following commands can be used + + # mount -t configfs none /sys/kernel/config + # cd /sys/kernel/config/pci_ep/ + # mkdir functions/pci_epf_test/func1 + +The "mkdir func1" above creates the pci-epf-test function device that will +be probed by pci_epf_test driver. + +The PCI endpoint framework populates the directory with the following +configurable fields. + + # ls functions/pci_epf_test/func1 + baseclass_code interrupt_pin revid subsys_vendor_id + cache_line_size msi_interrupts subclass_code vendorid + deviceid progif_code subsys_id + +The PCI endpoint function driver populates these entries with default values +when the device is bound to the driver. The pci-epf-test driver populates +vendorid with 0xffff and interrupt_pin with 0x0001 + + # cat functions/pci_epf_test/func1/vendorid + 0xffff + # cat functions/pci_epf_test/func1/interrupt_pin + 0x0001 + +1.4 Configuring pci-epf-test Device + +The user can configure the pci-epf-test device using configfs entry. In order +to change the vendorid and the number of MSI interrupts used by the function +device, the following commands can be used. + + # echo 0x104c > functions/pci_epf_test/func1/vendorid + # echo 0xb500 > functions/pci_epf_test/func1/deviceid + # echo 16 > functions/pci_epf_test/func1/msi_interrupts + +1.5 Binding pci-epf-test Device to EP Controller + +In order for the endpoint function device to be useful, it has to be bound to +a PCI endpoint controller driver. Use the configfs to bind the function +device to one of the controller driver present in the system. + + # ln -s functions/pci_epf_test/func1 controllers/51000000.pcie_ep/ + +Once the above step is completed, the PCI endpoint is ready to establish a link +with the host. + +1.6 Start the Link + +In order for the endpoint device to establish a link with the host, the _start_ +field should be populated with '1'. + + # echo 1 > controllers/51000000.pcie_ep/start + +2. RootComplex Device + +2.1 lspci Output + +Note that the devices listed here correspond to the value populated in 1.4 above + + 00:00.0 PCI bridge: Texas Instruments Device 8888 (rev 01) + 01:00.0 Unassigned class [ff00]: Texas Instruments Device b500 + +2.2 Using Endpoint Test function Device + +pcitest.sh added in tools/pci/ can be used to run all the default PCI endpoint +tests. Before pcitest.sh can be used pcitest.c should be compiled using the +following commands. + + cd + make headers_install ARCH=arm + arm-linux-gnueabihf-gcc -Iusr/include tools/pci/pcitest.c -o pcitest + cp pcitest /usr/sbin/ + cp tools/pci/pcitest.sh + +2.2.1 pcitest.sh Output + # ./pcitest.sh + BAR tests + + BAR0: OKAY + BAR1: OKAY + BAR2: OKAY + BAR3: OKAY + BAR4: NOT OKAY + BAR5: NOT OKAY + + Interrupt tests + + LEGACY IRQ: NOT OKAY + MSI1: OKAY + MSI2: OKAY + MSI3: OKAY + MSI4: OKAY + MSI5: OKAY + MSI6: OKAY + MSI7: OKAY + MSI8: OKAY + MSI9: OKAY + MSI10: OKAY + MSI11: OKAY + MSI12: OKAY + MSI13: OKAY + MSI14: OKAY + MSI15: OKAY + MSI16: OKAY + MSI17: NOT OKAY + MSI18: NOT OKAY + MSI19: NOT OKAY + MSI20: NOT OKAY + MSI21: NOT OKAY + MSI22: NOT OKAY + MSI23: NOT OKAY + MSI24: NOT OKAY + MSI25: NOT OKAY + MSI26: NOT OKAY + MSI27: NOT OKAY + MSI28: NOT OKAY + MSI29: NOT OKAY + MSI30: NOT OKAY + MSI31: NOT OKAY + MSI32: NOT OKAY + + Read Tests + + READ ( 1 bytes): OKAY + READ ( 1024 bytes): OKAY + READ ( 1025 bytes): OKAY + READ (1024000 bytes): OKAY + READ (1024001 bytes): OKAY + + Write Tests + + WRITE ( 1 bytes): OKAY + WRITE ( 1024 bytes): OKAY + WRITE ( 1025 bytes): OKAY + WRITE (1024000 bytes): OKAY + WRITE (1024001 bytes): OKAY + + Copy Tests + + COPY ( 1 bytes): OKAY + COPY ( 1024 bytes): OKAY + COPY ( 1025 bytes): OKAY + COPY (1024000 bytes): OKAY + COPY (1024001 bytes): OKAY