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[v2,00/10] Multi-segment Event Ring support for XHCI

Message ID cover.1692892942.git.lukas@wunner.de
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Series Multi-segment Event Ring support for XHCI | expand

Message

Lukas Wunner Aug. 24, 2023, 4:15 p.m. UTC 
Enlarge the XHCI Event Ring to cope with high load situations
by allowing more than one segment.

This second iteration seeks to address all of Mathias' review feedback on v1:

* Patch [01/10]:
  Use ERST_DESI_MASK instead of ERST_PTR_MASK when constructing the new
  ERDP value to avoid carrying over a set EHB bit.

* Patch [04/10]:
  Only use up to 2 Event Ring segments by default (instead of 8).

* Patch [05/10]:
  New patch to adjust segment numbers after ring expansion.

* Patch [08/10]:
  New patch to clean up ERST_PTR_MASK inversion.

Several other issues caught my eye and I'm including fixes and cleanups
for those as well.

Link to v1:
https://lore.kernel.org/all/cover.1692085657.git.lukas@wunner.de/


Jonathan Bell (1):
  xhci: Use more than one Event Ring segment

Lukas Wunner (9):
  xhci: Clear EHB bit only at end of interrupt handler
  xhci: Preserve RsvdP bits in ERSTBA register correctly
  xhci: Set DESI bits in ERDP register correctly
  xhci: Adjust segment numbers after ring expansion
  xhci: Update last segment pointer after Event Ring expansion
  xhci: Expose segment numbers in debugfs
  xhci: Clean up ERST_PTR_MASK inversion
  xhci: Clean up stale comment on ERST_SIZE macro
  xhci: Clean up xhci_{alloc,free}_erst() declarations

 drivers/usb/host/xhci-debugfs.c |  2 +-
 drivers/usb/host/xhci-mem.c     | 68 ++++++++++++++++++---------------
 drivers/usb/host/xhci-ring.c    | 17 +++++----
 drivers/usb/host/xhci.c         |  2 +-
 drivers/usb/host/xhci.h         | 18 +++------
 5 files changed, 53 insertions(+), 54 deletions(-)