Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) .. SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) =====================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Driver for PCI Endpoint Test Function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) =====================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) This driver should be used as a host side driver if the root complex is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) connected to a configurable PCI endpoint running ``pci_epf_test`` function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) driver configured according to [1]_.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) The "pci_endpoint_test" driver can be used to perform the following tests.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) The PCI driver for the test device performs the following tests:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	#) verifying addresses programmed in BAR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	#) raise legacy IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	#) raise MSI IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	#) raise MSI-X IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	#) read data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	#) write data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	#) copy data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) This misc driver creates /dev/pci-endpoint-test.<num> for every
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ``pci_epf_test`` function connected to the root complex and "ioctls"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) should be used to perform the above tests.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) -----
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  PCITEST_BAR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	      Tests the BAR. The number of the BAR to be tested
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	      should be passed as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  PCITEST_LEGACY_IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	      Tests legacy IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  PCITEST_MSI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	      Tests message signalled interrupts. The MSI number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	      to be tested should be passed as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  PCITEST_MSIX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	      Tests message signalled interrupts. The MSI-X number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	      to be tested should be passed as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  PCITEST_SET_IRQTYPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	      Changes driver IRQ type configuration. The IRQ type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	      should be passed as argument (0: Legacy, 1:MSI, 2:MSI-X).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  PCITEST_GET_IRQTYPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	      Gets driver IRQ type configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)  PCITEST_WRITE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	      Perform write tests. The size of the buffer should be passed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	      as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  PCITEST_READ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	      Perform read tests. The size of the buffer should be passed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	      as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)  PCITEST_COPY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	      Perform read tests. The size of the buffer should be passed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	      as argument.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .. [1] Documentation/PCI/endpoint/function/binding/pci-test.rst