path: root/Documentation/rapidio
diff options
authorAlexandre Bounine <alexandre.bounine@idt.com>2011-11-02 13:39:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-02 16:07:01 -0700
commit48618fb4e522d9d02e217ac05f52749545c1af20 (patch)
tree4699179c3eacc0ec63d03ac631fae6822fa10969 /Documentation/rapidio
parente80dd9a7bca4057d5a09d1ba94a7ba0791e7426a (diff)
RapidIO: add mport driver for Tsi721 bridge
Add RapidIO mport driver for IDT TSI721 PCI Express-to-SRIO bridge device. The driver provides full set of callback functions defined for mport devices in RapidIO subsystem. It also is compatible with current version of RIONET driver (Ethernet over RapidIO messaging services). This patch is applicable to kernel versions starting from 2.6.39. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Chul Kim <chul.kim@idt.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
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+RapidIO subsystem mport driver for IDT Tsi721 PCI Express-to-SRIO bridge.
+I. Overview
+This driver implements all currently defined RapidIO mport callback functions.
+It supports maintenance read and write operations, inbound and outbound RapidIO
+doorbells, inbound maintenance port-writes and RapidIO messaging.
+To generate SRIO maintenance transactions this driver uses one of Tsi721 DMA
+channels. This mechanism provides access to larger range of hop counts and
+destination IDs without need for changes in outbound window translation.
+RapidIO messaging support uses dedicated messaging channels for each mailbox.
+For inbound messages this driver uses destination ID matching to forward messages
+into the corresponding message queue. Messaging callbacks are implemented to be
+fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
+II. Known problems
+ None.
+III. To do
+ Add DMA data transfers (non-messaging).
+ Add inbound region (SRIO-to-PCIe) mapping.
+IV. Version History
+ 1.0.0 - Initial driver release.
+V. License
+ Copyright(c) 2011 Integrated Device Technology, Inc. All rights reserved.
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at your option)
+ any later version.
+ This program is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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