mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
c2e00e3108
Add MSI-X support and update driver documentation accordingly. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
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
|
|
*) raise MSI-X 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_MSIX: Tests message signalled interrupts. The MSI-X 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
|