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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /Documentation/PCI/endpoint/pci-test-function.rst | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'Documentation/PCI/endpoint/pci-test-function.rst')
| -rw-r--r-- | Documentation/PCI/endpoint/pci-test-function.rst | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/Documentation/PCI/endpoint/pci-test-function.rst b/Documentation/PCI/endpoint/pci-test-function.rst new file mode 100644 index 000000000..3c8521d7a --- /dev/null +++ b/Documentation/PCI/endpoint/pci-test-function.rst @@ -0,0 +1,103 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================= +PCI Test Function +================= + +:Author: Kishon Vijay Abraham I <kishon@ti.com> + +Traditionally PCI RC has always been validated by using standard +PCI cards like ethernet PCI cards or USB PCI cards or SATA PCI cards. +However with the addition of EP-core in linux kernel, it is possible +to configure a PCI controller that can operate in EP mode to work as +a test device. + +The PCI endpoint test device is a virtual device (defined in software) +used to test the endpoint functionality and serve as a sample driver +for other PCI endpoint devices (to use the EP framework). + +The PCI endpoint test device has the following registers: + + 1) PCI_ENDPOINT_TEST_MAGIC + 2) PCI_ENDPOINT_TEST_COMMAND + 3) PCI_ENDPOINT_TEST_STATUS + 4) PCI_ENDPOINT_TEST_SRC_ADDR + 5) PCI_ENDPOINT_TEST_DST_ADDR + 6) PCI_ENDPOINT_TEST_SIZE + 7) PCI_ENDPOINT_TEST_CHECKSUM + 8) PCI_ENDPOINT_TEST_IRQ_TYPE + 9) PCI_ENDPOINT_TEST_IRQ_NUMBER + +* PCI_ENDPOINT_TEST_MAGIC + +This register will be used to test BAR0. A known pattern will be written +and read back from MAGIC register to verify BAR0. + +* PCI_ENDPOINT_TEST_COMMAND + +This register will be used by the host driver to indicate the function +that the endpoint device must perform. + +======== ================================================================ +Bitfield Description +======== ================================================================ +Bit 0 raise legacy IRQ +Bit 1 raise MSI IRQ +Bit 2 raise MSI-X IRQ +Bit 3 read command (read data from RC buffer) +Bit 4 write command (write data to RC buffer) +Bit 5 copy command (copy data from one RC buffer to another RC buffer) +======== ================================================================ + +* PCI_ENDPOINT_TEST_STATUS + +This register reflects the status of the PCI endpoint device. + +======== ============================== +Bitfield Description +======== ============================== +Bit 0 read success +Bit 1 read fail +Bit 2 write success +Bit 3 write fail +Bit 4 copy success +Bit 5 copy fail +Bit 6 IRQ raised +Bit 7 source address is invalid +Bit 8 destination address is invalid +======== ============================== + +* PCI_ENDPOINT_TEST_SRC_ADDR + +This register contains the source address (RC buffer address) for the +COPY/READ command. + +* PCI_ENDPOINT_TEST_DST_ADDR + +This register contains the destination address (RC buffer address) for +the COPY/WRITE command. + +* PCI_ENDPOINT_TEST_IRQ_TYPE + +This register contains the interrupt type (Legacy/MSI) triggered +for the READ/WRITE/COPY and raise IRQ (Legacy/MSI) commands. + +Possible types: + +====== == +Legacy 0 +MSI 1 +MSI-X 2 +====== == + +* PCI_ENDPOINT_TEST_IRQ_NUMBER + +This register contains the triggered ID interrupt. + +Admissible values: + +====== =========== +Legacy 0 +MSI [1 .. 32] +MSI-X [1 .. 2048] +====== =========== |
