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Commit 48618fb4 authored by Alexandre Bounine's avatar Alexandre Bounine Committed by Linus Torvalds
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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: default avatarAlexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: default avatarChul 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e80dd9a7

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.

drivers/rapidio/Kconfig

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#

# RapidIO configuration

#

source "drivers/rapidio/devices/Kconfig"



config RAPIDIO_DISC_TIMEOUT

	int "Discovery timeout duration (seconds)"

	depends on RAPIDIO
@@ -20,8 +22,6 @@ config RAPIDIO_ENABLE_RX_TX_PORTS 
	  ports for Input/Output direction to allow other traffic

	  than Maintenance transfers.



source "drivers/rapidio/switches/Kconfig"



config RAPIDIO_DEBUG

	bool "RapidIO subsystem debug messages"

	depends on RAPIDIO
@@ -32,3 +32,5 @@ config RAPIDIO_DEBUG 
	  going on.



	  If you are unsure about this, say N here.



source "drivers/rapidio/switches/Kconfig"

drivers/rapidio/Makefile

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@@ -4,5 +4,6 @@ 
obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o



obj-$(CONFIG_RAPIDIO)		+= switches/

obj-$(CONFIG_RAPIDIO)		+= devices/



subdir-ccflags-$(CONFIG_RAPIDIO_DEBUG) := -DDEBUG

drivers/rapidio/devices/Kconfig

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#

# RapidIO master port configuration

#



config RAPIDIO_TSI721

	bool "IDT Tsi721 PCI Express SRIO Controller support"

	depends on RAPIDIO && PCIEPORTBUS

	default "n"

	---help---

	  Include support for IDT Tsi721 PCI Express Serial RapidIO controller.

drivers/rapidio/devices/Makefile

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#

# Makefile for RapidIO devices

#



obj-$(CONFIG_RAPIDIO_TSI721)	+= tsi721.o