kernel/linux.git/drivers/misc/pci_endpoint_test.c, branch linux-7.1.y

selftests: pci_endpoint: Skip BAR subrange test on -ENOSPC

2026-04-08T19:41:39+00:00

In pci-epf-test.c, set the STATUS_NO_RESOURCE status bit if pci_epc_set_bar() returns -ENOSPC. This status bit is used to indicate that there are not enough inbound window resources to allocate the subrange. In pci_endpoint_test.c, return -ENOSPC instead of -EIO when STATUS_NO_RESOURCE is set. In pci_endpoint_test.c, skip the BAR subrange test if -ENOSPC, i.e., there are not enough inbound window resources to run the test. Signed-off-by: Christian Bruel [mani: commit log] Signed-off-by: Manivannan Sadhasivam [bhelgaas: squash related commits] Signed-off-by: Bjorn Helgaas Reviewed-by: Niklas Cassel Reviewed-by: Frank Li Reviewed-by: Koichiro Den Link: https://patch.msgid.link/20260407-skip-bar_subrange-tests-if-enospc-v4-1-6f2e65f2298c@foss.st.com Link: https://patch.msgid.link/20260407-skip-bar_subrange-tests-if-enospc-v4-2-6f2e65f2298c@foss.st.com Link: https://patch.msgid.link/20260407-skip-bar_subrange-tests-if-enospc-v4-3-6f2e65f2298c@foss.st.com

misc: pci_endpoint_test: Add Tegra194 and Tegra234 device table entries

2026-04-04T10:47:02+00:00

Add PCI device IDs for Tegra194 (0x1ad4) and Tegra234(0x229b) Endpoint controllers, so that pci_endpoint_test can bind and run on these controllers. Signed-off-by: Manikanta Maddireddy Signed-off-by: Manivannan Sadhasivam Reviewed-by: Niklas Cassel Link: https://patch.msgid.link/20260324080857.916263-5-mmaddireddy@nvidia.com

misc: pci_endpoint_test: Use -EINVAL for small subrange size

2026-04-03T16:34:36+00:00

The sub_size check ensures that each subrange is large enough for 32-bit accesses. Subranges smaller than sizeof(u32) do not satisfy this assumption, so this is a local sanity check rather than a resource exhaustion case. Return -EINVAL instead of -ENOSPC for this case. Suggested-by: Niklas Cassel Signed-off-by: Koichiro Den Signed-off-by: Manivannan Sadhasivam Reviewed-by: Niklas Cassel Link: https://patch.msgid.link/20260320140139.2415480-1-den@valinux.co.jp

misc: pci_endpoint_test: Give reserved BARs a distinct error code

2026-03-15T16:34:28+00:00

Give reserved BARs a distinct error code, such that the pci_endpoint_test selftest will be able to skip test cases that are run against reserved BARs. Signed-off-by: Niklas Cassel [mani: Used __fls(CAP_BAR0_RESERVED) instead of PCI_ENDPOINT_CAP_BAR0_RESERVED_BIT] Signed-off-by: Manivannan Sadhasivam Tested-by: Manikanta Maddireddy Tested-by: Koichiro Den Reviewed-by: Frank Li Link: https://patch.msgid.link/20260312130229.2282001-21-cassel@kernel.org

misc: pci_endpoint_test: Gate doorbell test on dynamic inbound mapping

2026-02-24T10:30:50+00:00

The doorbell test relies on the endpoint being able to update inbound translations at runtime so the host can reach the doorbell target through a BAR mapping. If the endpoint does not advertise CAP_DYNAMIC_INBOUND_MAPPING, return -EOPNOTSUPP from PCITEST_DOORBELL. This avoids confusing failures in user space and kselftests when the required capability is not available. Suggested-by: Niklas Cassel Signed-off-by: Koichiro Den Signed-off-by: Manivannan Sadhasivam Reviewed-by: Niklas Cassel Link: https://patch.msgid.link/20260215150334.3391943-3-den@valinux.co.jp

misc: pci_endpoint_test: Add BAR subrange mapping test case

2026-01-29T23:42:29+00:00

Add a new PCITEST_BAR_SUBRANGE ioctl to exercise EPC BAR subrange mapping end-to-end. The test programs a simple 2-subrange layout on the endpoint (via pci-epf-test) and verifies that: - the endpoint-provided per-subrange signature bytes are observed at the expected PCIe BAR offsets, and - writes to each subrange are routed to the correct backing region (i.e. the submap order is applied rather than accidentally working due to an identity mapping). Return -EOPNOTSUPP when the endpoint does not advertise subrange mapping, -ENODATA when the BAR is disabled, and -EBUSY when the BAR is reserved for the test register space. Signed-off-by: Koichiro Den Signed-off-by: Manivannan Sadhasivam Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20260124145012.2794108-8-den@valinux.co.jp

misc: pci_endpoint_test: Cleanup extra 0 initialization

2025-08-27T13:09:32+00:00

Initialization is not needed as memory is already set to 0 by devm_kzalloc. Signed-off-by: Christian Bruel [mani: reworded description] Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20250804170916.3212221-3-christian.bruel@foss.st.com

misc: pci_endpoint_test: Skip IRQ tests if irq is out of range

2025-08-27T13:09:06+00:00

The pci_endpoint_test tests the 32-bit MSI range. However, the device might not have all vectors configured. For example, if msi_interrupts is 8 in the ep function space or if the MSI Multiple Message Capable value is configured as 4 (maximum 16 vectors). In this case, do not attempt to run the test to avoid timeouts and directly return the error value. Signed-off-by: Christian Bruel Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20250804170916.3212221-2-christian.bruel@foss.st.com

misc: pci_endpoint_test: Fix array underflow in pci_endpoint_test_ioctl()

2025-08-13T21:25:04+00:00

Commit eefb83790a0d ("misc: pci_endpoint_test: Add doorbell test case") added NO_BAR (-1) to the pci_barno enum which, in practical terms, changes the enum from an unsigned int to a signed int. If the user passes a negative number in pci_endpoint_test_ioctl() then it results in an array underflow in pci_endpoint_test_bar(). Fixes: eefb83790a0d ("misc: pci_endpoint_test: Add doorbell test case") Signed-off-by: Dan Carpenter Signed-off-by: Manivannan Sadhasivam Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/aIzzZ4vc6ZrmM9rI@suswa

misc: pci_endpoint_test: Add doorbell test case

2025-07-24T21:51:46+00:00

Add doorbell support with the help of three new registers: PCIE_ENDPOINT_TEST_DB_BAR, PCIE_ENDPOINT_TEST_DB_ADDR, and PCIE_ENDPOINT_TEST_DB_DATA. The testcase works by triggering the doorbell in Endpoint by writing the value from PCI_ENDPOINT_TEST_DB_DATA register to the address provided by PCI_ENDPOINT_TEST_DB_OFFSET register of the BAR indicated by the PCIE_ENDPOINT_TEST_DB_BAR register and waiting for the completion status from the Endpoint. Signed-off-by: Frank Li [mani: removed one spurious change and reworded the commit message] Signed-off-by: Manivannan Sadhasivam Signed-off-by: Bjorn Helgaas Tested-by: Niklas Cassel Link: https://patch.msgid.link/20250710-ep-msi-v21-7-57683fc7fb25@nxp.com