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| -rw-r--r-- | Documentation/PCI/endpoint/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/PCI/endpoint/pci-test-howto.rst (renamed from Documentation/PCI/endpoint/pci-test-howto.txt) | 81 |
2 files changed, 56 insertions, 26 deletions
diff --git a/Documentation/PCI/endpoint/index.rst b/Documentation/PCI/endpoint/index.rst index b680a3fc4fec..d114ea74b444 100644 --- a/Documentation/PCI/endpoint/index.rst +++ b/Documentation/PCI/endpoint/index.rst @@ -10,3 +10,4 @@ PCI Endpoint Framework pci-endpoint pci-endpoint-cfs pci-test-function + pci-test-howto diff --git a/Documentation/PCI/endpoint/pci-test-howto.txt b/Documentation/PCI/endpoint/pci-test-howto.rst index 040479f437a5..909f770a07d6 100644 --- a/Documentation/PCI/endpoint/pci-test-howto.txt +++ b/Documentation/PCI/endpoint/pci-test-howto.rst @@ -1,38 +1,51 @@ - PCI TEST USERGUIDE - Kishon Vijay Abraham I <kishon@ti.com> +.. SPDX-License-Identifier: GPL-2.0 + +=================== +PCI Test User Guide +=================== + +:Author: Kishon Vijay Abraham I <kishon@ti.com> 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 +Endpoint Device +=============== -1.1 Endpoint Controller Devices +Endpoint Controller Devices +--------------------------- -To find the list of endpoint controller devices in the system: +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 +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: +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 +If PCI_ENDPOINT_CONFIGFS is enabled:: + # ls /sys/kernel/config/pci_ep/functions pci_epf_test -1.3 Creating pci-epf-test Device + +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 +pci-epf-test device, the following commands can be used:: # mount -t configfs none /sys/kernel/config # cd /sys/kernel/config/pci_ep/ @@ -42,7 +55,7 @@ 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. +configurable fields:: # ls functions/pci_epf_test/func1 baseclass_code interrupt_pin progif_code subsys_id @@ -51,67 +64,83 @@ configurable fields. 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 +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 + +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. +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 # echo 8 > functions/pci_epf_test/func1/msix_interrupts -1.5 Binding pci-epf-test Device to EP Controller + +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. +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 + +Start the Link +-------------- In order for the endpoint device to establish a link with the host, the _start_ -field should be populated with '1'. +field should be populated with '1':: # echo 1 > controllers/51000000.pcie_ep/start -2. RootComplex Device -2.1 lspci Output +RootComplex Device +================== + +lspci Output +------------ -Note that the devices listed here correspond to the value populated in 1.4 above +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 + +Using Endpoint Test function Device +----------------------------------- pcitest.sh added in tools/pci/ can be used to run all the default PCI endpoint -tests. To compile this tool the following commands should be used: +tests. To compile this tool the following commands should be used:: # cd <kernel-dir> # make -C tools/pci -or if you desire to compile and install in your system: +or if you desire to compile and install in your system:: # cd <kernel-dir> # make -C tools/pci install The tool and script will be located in <rootfs>/usr/bin/ -2.2.1 pcitest.sh Output + +pcitest.sh Output +~~~~~~~~~~~~~~~~~ +:: + # pcitest.sh BAR tests |