On 2020/12/11 14:01, SAITOH Masanobu wrote:
Module Name:src
Committed By: msaitoh
Date: Fri Dec 11 05:01:19 UTC 2020
Modified Files:
src/sys/dev/pci/ixgbe: ixgbe.c ixgbe_type.h
Log Message:
Don't use EIMC_OTHER bit because it's read only other than 82598.
Documents say:
82598:
All of bit 31(OTHER bit) of EIxx are reserved. In reality, at least
EIMS_OTHER and EIMC_OTHER exist and the OTHER interrupt doesn't work
without EIMS_OTHER.
Other than 82598:
+ EICR's bit 31 is defined and other EIXX's bit 31 are reserved.
+ In reality,
EIMS_OTHER is read only and EIMC_OTHER doesn't exist. If one of
bit 29..16 is set, EIMS_OTHER is set to 1 (Note that bit 30(TCP timer
isn't included)). Even if write bit 31 of EIMC to 1, it's ignored
(EIMS_OTHER doesn't set).
We introduced new spin mutex in ixgbe.c rev. 1.260, so it's OK to remove
EIMC_OTHER stuff. We already set EIMS_OTHER in if_init(), so keep it for
82598. No functional change other than 82598.
Another solution is to control bit 30..16 directly to mask/unmask interrupt
instead of the mutex.
TODO:
Some MSI-X interrupt(LSC, module insertion/removal etc.)'s mask/unmask
code between ixgbe_msix_admin() and ixgbe_handle_admin() may be wrong.
It'll be fixed later.
To generate a diff of this commit:
cvs rdiff -u -r1.261 -r1.262 src/sys/dev/pci/ixgbe/ixgbe.c
cvs rdiff -u -r1.45 -r1.46 src/sys/dev/pci/ixgbe/ixgbe_type.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
--
---
SAITOH Masanobu (msai...@execsw.org
msai...@netbsd.org)
