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Intel MIC Card Driver Changes for Virtio Devices.

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This patch introduces the card "Virtio over PCIe" interface for
Intel MIC. It allows virtio drivers on the card to communicate with their
user space backends on the host via a device page. Ring 3 apps on the host
can add, remove and configure virtio devices. A thin MIC specific
virtio_config_ops is implemented which is borrowed heavily from previous
similar implementations in lguest and s390 @
drivers/lguest/lguest_device.c
drivers/s390/kvm/kvm_virtio.c

Co-author: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Caz Yokoyama <Caz.Yokoyama@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Harshavardhan R Kharche <harshavardhan.r.kharche@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Acked-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashutosh Dixit
2013-09-05 16:42:28 -07:00
committed by Greg Kroah-Hartman
parent f69bcbf3b4
commit 2141c7c5ee
5 changed files with 717 additions and 0 deletions
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7
drivers/misc/mic/card/mic_device.c
View File

@@ -32,6 +32,7 @@
#include <linux/mic_common.h>
#include "../common/mic_device.h"
#include "mic_device.h"
#include "mic_virtio.h"
static struct mic_driver *g_drv;
static struct mic_irq *shutdown_cookie;
@@ -265,10 +266,15 @@ int __init mic_driver_init(struct mic_driver *mdrv)
rc = mic_shutdown_init();
if (rc)
goto irq_uninit;
rc = mic_devices_init(mdrv);
if (rc)
goto shutdown_uninit;
mic_create_card_debug_dir(mdrv);
atomic_notifier_chain_register(&panic_notifier_list, &mic_panic);
done:
return rc;
shutdown_uninit:
mic_shutdown_uninit();
irq_uninit:
mic_uninit_irq();
dp_uninit:
@@ -286,6 +292,7 @@ put:
void mic_driver_uninit(struct mic_driver *mdrv)
{
mic_delete_card_debug_dir(mdrv);
mic_devices_uninit(mdrv);
/*
* Inform the host about the shutdown status i.e. poweroff/restart etc.
* The module cannot be unloaded so the only code path to call