Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/Documentation/misc-devices/pci-endpoint-test.rst b/Documentation/misc-devices/pci-endpoint-test.rst
new file mode 100644
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+++ b/Documentation/misc-devices/pci-endpoint-test.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+=====================================
+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_SET_IRQTYPE:
+	      Changes driver IRQ type configuration. The IRQ type
+	      should be passed as argument (0: Legacy, 1:MSI, 2:MSI-X).
+ PCITEST_GET_IRQTYPE:
+	      Gets driver IRQ type configuration.
+ 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.rst