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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-19 20:41:53 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-19 20:41:53 -1000
commitc8a0739b185d11d6e2ca7ad9f5835841d1cfc765 (patch)
tree7f3c2cc0d7ed32fe4f0580217c3734e3ecc1505c /Documentation
parent020aae3ee58c1af0e7ffc4e2cc9fe4dc630338cb (diff)
parent4201a9918c49bece71d25b2ef30cbadb1fc528e8 (diff)
downloadlinux-c8a0739b185d11d6e2ca7ad9f5835841d1cfc765.tar.bz2
Merge tag 'ntb-4.15' of git://github.com/jonmason/ntb
Pull ntb updates from Jon Mason: "Support for the switchtec ntb and related changes. Also, a couple of bug fixes" [ The timing isn't great. I had asked people to send me pull requests before my family vacation, and this code has not even been in linux-next as far as I can tell. But Logan Gunthorpe pleaded for its inclusion because the Switchtec driver has apparently been around for a while, just never in linux-next - Linus ] * tag 'ntb-4.15' of git://github.com/jonmason/ntb: ntb: intel: remove b2b memory window workaround for Skylake NTB NTB: make idt_89hpes_cfg const NTB: switchtec_ntb: Update switchtec documentation with notes for NTB NTB: switchtec_ntb: Add memory window support NTB: switchtec_ntb: Implement scratchpad registers NTB: switchtec_ntb: Implement doorbell registers NTB: switchtec_ntb: Add link management NTB: switchtec_ntb: Add skeleton NTB driver NTB: switchtec_ntb: Initialize hardware for doorbells and messages NTB: switchtec_ntb: Initialize hardware for memory windows NTB: switchtec_ntb: Introduce initial NTB driver NTB: Add check and comment for link up to mw_count() and mw_get_align() NTB: Ensure ntb_mw_get_align() is only called when the link is up NTB: switchtec: Add link event notifier callback NTB: switchtec: Add NTB hardware register definitions NTB: switchtec: Export class symbol for use in upper layer driver NTB: switchtec: Move structure definitions into a common header ntb: update maintainer list for Intel NTB driver
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/switchtec.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/switchtec.txt b/Documentation/switchtec.txt
index a0a9c7b3d4d5..f788264921ff 100644
--- a/Documentation/switchtec.txt
+++ b/Documentation/switchtec.txt
@@ -78,3 +78,15 @@ The following IOCTLs are also supported by the device:
between PCI Function Framework number (used by the event system)
and Switchtec Logic Port ID and Partition number (which is more
user friendly).
+
+
+Non-Transparent Bridge (NTB) Driver
+===================================
+
+An NTB driver is provided for the switchtec hardware in switchtec_ntb.
+Currently, it only supports switches configured with exactly 2
+partitions. It also requires the following configuration settings:
+
+* Both partitions must be able to access each other's GAS spaces.
+ Thus, the bits in the GAS Access Vector under Management Settings
+ must be set to support this.