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| author | Serge Semin <fancer.lancer@gmail.com> | 2017-01-11 03:11:33 +0300 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2017-07-06 18:30:07 +0300 |
| commit | 443b9a14ecbe811071467d54d6f2f1182835cc4d (patch) | |
| tree | 240003b0193c3ba06090b13479acc949ceb36640 /drivers/ntb/ntb.c | |
| parent | 4e8c11b7fd29f70eb7af43bae908297689f2c3da (diff) | |
| download | linux-443b9a14ecbe811071467d54d6f2f1182835cc4d.tar.xz | |
NTB: Alter MW API to support multi-ports devices
Multi-port NTB devices permit to share a memory between all accessible peers.
Memory Windows API is altered to correspondingly initialize and map memory
windows for such devices:
ntb_mw_count(pidx); - number of inbound memory windows, which can be allocated
for shared buffer with specified peer device.
ntb_mw_get_align(pidx, widx); - get alignment and size restriction parameters
to properly allocate inbound memory region.
ntb_peer_mw_count(); - get number of outbound memory windows.
ntb_peer_mw_get_addr(widx); - get mapping address of an outbound memory window
If hardware supports inbound translation configured on the local ntb port:
ntb_mw_set_trans(pidx, widx); - set translation address of allocated inbound
memory window so a peer device could access it.
ntb_mw_clear_trans(pidx, widx); - clear the translation address of an inbound
memory window.
If hardware supports outbound translation configured on the peer ntb port:
ntb_peer_mw_set_trans(pidx, widx); - set translation address of a memory
window retrieved from a peer device
ntb_peer_mw_clear_trans(pidx, widx); - clear the translation address of an
outbound memory window
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/ntb.c')
| -rw-r--r-- | drivers/ntb/ntb.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ntb/ntb.c b/drivers/ntb/ntb.c index 1e92e52813aa..2551bb2ff4a4 100644 --- a/drivers/ntb/ntb.c +++ b/drivers/ntb/ntb.c @@ -5,6 +5,7 @@ * GPL LICENSE SUMMARY * * Copyright (C) 2015 EMC Corporation. All Rights Reserved. + * Copyright (C) 2016 T-Platforms. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -18,6 +19,7 @@ * BSD LICENSE * * Copyright (C) 2015 EMC Corporation. All Rights Reserved. + * Copyright (C) 2016 T-Platforms. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions |