Commit 0cfb512e authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Bjorn Helgaas

Documentation: misc-devices: Add Documentation for pci-endpoint-test driver

Add Documentation for pci-endpoint-test driver.
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 2c156ac7
Driver for PCI Endpoint Test Function
This driver should be used as a host side driver if the root complex is
connected to a configurable PCI endpoint running *pci_epf_test* function
driver configured according to [1].
The "pci_endpoint_test" driver can be used to perform the following tests.
The PCI driver for the test device performs the following tests
*) verifying addresses programmed in BAR
*) raise legacy IRQ
*) raise MSI IRQ
*) read data
*) write data
*) copy data
This misc driver creates /dev/pci-endpoint-test.<num> for every
*pci_epf_test* function connected to the root complex and "ioctls"
should be used to perform the above tests.
ioctl
-----
PCITEST_BAR: Tests the BAR. The number of the BAR to be tested
should be passed as argument.
PCITEST_LEGACY_IRQ: Tests legacy IRQ
PCITEST_MSI: Tests message signalled interrupts. The MSI number
to be tested should be passed as argument.
PCITEST_WRITE: Perform write tests. The size of the buffer should be passed
as argument.
PCITEST_READ: Perform read tests. The size of the buffer should be passed
as argument.
PCITEST_COPY: Perform read tests. The size of the buffer should be passed
as argument.
[1] -> Documentation/PCI/endpoint/function/binding/pci-test.txt
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