[PATCH v2 0/3] ntb_hw_switchtec: Added support of >=4G memory windows
From: Wesley Sheng
Date: Thu Dec 06 2018 - 02:33:06 EST
Hi, Everyone,
This patch series adds support of >=4G memory windows.
Current Switchtec's BAR setup registers are limited to 32bits,
corresponding to the maximum MW (memory window) size is <4G.
Increase the MW sizes with the addition of the BAR Setup Extension
Register for the upper 32bits of a 64bits MW size. This increases the MW
range to between 4K and 2^63.
Additionally, we've made the following changes:
* debug print 64bit aligned crosslink BAR numbers
* Fix the array size of NT req id mapping table
Tested with ntb_test.sh successfully based on NTB fixes series from
Logan Gunthorpe <logang@xxxxxxxxxxxx> at
https://github.com/sbates130272/linux-p2pmem on branch of
ntb_multiport_fixes
Regards,
Wesley
--
Changed since v1:
- Using upper_32_bits() and lower_32_bits() marcos makes it easier
to read and avoids compiler warning on 32-bit arch
- Reorder the patches to make the bug fixes first and add a "Fixes"
line to the commit messages
--
Paul Selles (2):
ntb_hw_switchtec: debug print 64bit aligned crosslink BAR Numbers
ntb_hw_switchtec: Added support of >=4G memory windows
Wesley Sheng (1):
ntb_hw_switchtec: NT req id mapping table register entry number should
be 512
drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 11 ++++++++---
include/linux/switchtec.h | 10 +++++++---
2 files changed, 15 insertions(+), 6 deletions(-)
--
2.7.4