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staging: virthba driver to access shared SCSI hba

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The virthba module provides access to a shared SCSI host bus adapter
and one or more disk devices, by proxying SCSI commands between the
guest and the service partition that owns the shared SCSI adapter,
using a channel between the guest and the service partition. The disks
that appear on the shared bus are defined by the s-Par configuration
and enforced by the service partition, while the guest driver handles
sending commands and handling responses. Each disk is shared as a
whole to a guest. Sharing the bus adapter in this way provides
resiliency; should the device encounter an error, only the service
partition is rebooted, and the device is reinitialized. This allows
guests to continue running and to recover from the error.

Signed-off-by: Ken Cox <jkc@redhat.com>
Cc: Ben Romer <sparmaintainer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ken Cox 2014-03-04 07:58:11 -06:00 committed by Greg Kroah-Hartman
parent af86526b22
commit dc95086172
6 changed files with 1872 additions and 0 deletions
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1
drivers/staging/unisys/Kconfig
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@ -15,5 +15,6 @@ source "drivers/staging/unisys/visorchipset/Kconfig"
source "drivers/staging/unisys/channels/Kconfig"
source "drivers/staging/unisys/uislib/Kconfig"
source "drivers/staging/unisys/virtpci/Kconfig"
source "drivers/staging/unisys/virthba/Kconfig"
endif # UNISYSSPAR

1
drivers/staging/unisys/Makefile
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@ -7,3 +7,4 @@ obj-$(CONFIG_UNISYS_VISORCHIPSET) += visorchipset/
obj-$(CONFIG_UNISYS_CHANNELSTUB) += channels/
obj-$(CONFIG_UNISYS_UISLIB) += uislib/
obj-$(CONFIG_UNISYS_VIRTPCI) += virtpci/
obj-$(CONFIG_UNISYS_VIRTHBA) += virthba/

10
drivers/staging/unisys/virthba/Kconfig Normal file
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@ -0,0 +1,10 @@
#
# Unisys virthba configuration
#
config UNISYS_VIRTHBA
tristate "Unisys virthba driver"
depends on UNISYSSPAR && UNISYS_VISORCHIPSET && UNISYS_CHANNELSTUB && UNISYS_UISLIB && UNISYS_VIRTPCI
---help---
If you say Y here, you will enable the Unisys virthba driver.

16
drivers/staging/unisys/virthba/Makefile Normal file
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@ -0,0 +1,16 @@
#
# Makefile for Unisys virthba
#
obj-$(CONFIG_UNISYS_VIRTHBA) += virthba.o
ccflags-y += -Idrivers/staging/unisys/include
ccflags-y += -Idrivers/staging/unisys/uislib
ccflags-y += -Idrivers/staging/unisys/timskmod
ccflags-y += -Idrivers/staging/unisys/visorchipset
ccflags-y += -Idrivers/staging/unisys/virtpci
ccflags-y += -Idrivers/staging/unisys/common-spar/include
ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels
ccflags-y += -DCONFIG_SPAR_GUEST -DGUESTDRIVERBUILD -DNOAUTOVERSION

1813
drivers/staging/unisys/virthba/virthba.c Normal file
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31
drivers/staging/unisys/virthba/virthba.h Normal file
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@ -0,0 +1,31 @@
/* virthba.h
*
* Copyright © 2010 - 2013 UNISYS CORPORATION
* 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, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*/
/*
* Unisys Virtual HBA driver header
*/
#ifndef __VIRTHBA_H__
#define __VIRTHBA_H__
#define VIRTHBA_VERSION "01.00"
#endif /* __VIRTHBA_H__ */