[Intel-SIG] [devel-6.6] Enable FLR for IDXD halt · Pull Request !5708 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=24281

Enable FLR for IDXD halt.

When IDXD device hits hardware errors, it enters halt state and triggers
an interrupt to IDXD driver. Currently IDXD driver just prints an error
message in the interrupt handler.

A better way to handle the interrupt is to do Function Level Reset (FLR)
and recover the device's hardware and software configurations to its
previous working state. The device and software can continue to run after
the interrupt.

This series enables this FLR handling for IDXD device whose WQs are all
user type. FLR handling for IDXD device whose WQs are kernel type
will be implemented in a future series.

upstream commits:
98d187a98903 dmaengine: idxd: Enable Function Level Reset (FLR) for halt
3e114fa0fd15 dmaengine: idxd: Refactor halt handler
6078a315aec1 dmaengine: idxd: Add idxd_device_config_save() and idxd_device_config_restore() helpers
3ab45516772b dmaengine: idxd: Binding and unbinding IDXD device and driver
087e89b69b5f dmaengine: idxd: Add idxd_pci_probe_alloc() helper

Test passed on a SRF system. No extra config needed.

类型	指派人员	状态
审查	Guanjun xunlei Artie Ding Guixin Liu kun-llfl Xuchun Shang	已完成 (0/0人)
测试	小龙已测试通过	已完成 (1/1人)

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