From: Dexuan Cui <decui@microsoft.com>
To: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
Stephen Hemminger <sthemmin@microsoft.com>,
Sasha Levin <Alexander.Levin@microsoft.com>,
"sashal@kernel.org" <sashal@kernel.org>,
Haiyang Zhang <haiyangz@microsoft.com>,
KY Srinivasan <kys@microsoft.com>,
Michael Kelley <mikelley@microsoft.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Dexuan Cui <decui@microsoft.com>
Subject: [PATCH v2 7/7] Drivers: hv: vmbus: Implement suspend/resume for VSC drivers for hibernation
Date: Wed, 31 Jul 2019 17:52:07 +0000 [thread overview]
Message-ID: <1564595464-56520-8-git-send-email-decui@microsoft.com> (raw)
In-Reply-To: <1564595464-56520-1-git-send-email-decui@microsoft.com>
The high-level VSC drivers will implement device-specific callbacks.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
---
drivers/hv/vmbus_drv.c | 42 ++++++++++++++++++++++++++++++++++++++++++
include/linux/hyperv.h | 3 +++
2 files changed, 45 insertions(+)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index ca6f4c8..337ecce 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -911,6 +911,43 @@ static void vmbus_shutdown(struct device *child_device)
drv->shutdown(dev);
}
+/*
+ * vmbus_suspend - Suspend a vmbus device
+ */
+static int vmbus_suspend(struct device *child_device)
+{
+ struct hv_driver *drv;
+ struct hv_device *dev = device_to_hv_device(child_device);
+
+ /* The device may not be attached yet */
+ if (!child_device->driver)
+ return 0;
+
+ drv = drv_to_hv_drv(child_device->driver);
+ if (!drv->suspend)
+ return -EOPNOTSUPP;
+
+ return drv->suspend(dev);
+}
+
+/*
+ * vmbus_resume - Resume a vmbus device
+ */
+static int vmbus_resume(struct device *child_device)
+{
+ struct hv_driver *drv;
+ struct hv_device *dev = device_to_hv_device(child_device);
+
+ /* The device may not be attached yet */
+ if (!child_device->driver)
+ return 0;
+
+ drv = drv_to_hv_drv(child_device->driver);
+ if (!drv->resume)
+ return -EOPNOTSUPP;
+
+ return drv->resume(dev);
+}
/*
* vmbus_device_release - Final callback release of the vmbus child device
@@ -926,6 +963,10 @@ static void vmbus_device_release(struct device *device)
kfree(hv_dev);
}
+static const struct dev_pm_ops vmbus_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(vmbus_suspend, vmbus_resume)
+};
+
/* The one and only one */
static struct bus_type hv_bus = {
.name = "vmbus",
@@ -936,6 +977,7 @@ static void vmbus_device_release(struct device *device)
.uevent = vmbus_uevent,
.dev_groups = vmbus_dev_groups,
.drv_groups = vmbus_drv_groups,
+ .pm = &vmbus_pm,
};
struct onmessage_work_context {
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 6256cc3..94443c4 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -1149,6 +1149,9 @@ struct hv_driver {
int (*remove)(struct hv_device *);
void (*shutdown)(struct hv_device *);
+ int (*suspend)(struct hv_device *);
+ int (*resume)(struct hv_device *);
+
};
/* Base device object */
--
1.8.3.1
prev parent reply other threads:[~2019-07-31 17:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 17:52 [PATCH v2 0/7] Enhance the hv_vmbus driver to support hibernation Dexuan Cui
2019-07-31 17:52 ` [PATCH v2 1/7] x86/hyper-v: Suspend/resume the hypercall page for hibernation Dexuan Cui
2019-07-31 17:52 ` [PATCH v2 2/7] clocksource/drivers: Suspend/resume Hyper-V clocksource " Dexuan Cui
2019-07-31 17:52 ` [PATCH v2 3/7] Drivers: hv: vmbus: Break out synic enable and disable operations Dexuan Cui
2019-07-31 17:52 ` [PATCH v2 4/7] Drivers: hv: vmbus: Suspend/resume the synic for hibernation Dexuan Cui
2019-08-07 15:21 ` Michael Kelley
2019-07-31 17:52 ` [PATCH v2 5/7] Drivers: hv: vmbus: Ignore the offers when resuming from hibernation Dexuan Cui
2019-08-07 15:22 ` Michael Kelley
2019-07-31 17:52 ` [PATCH v2 6/7] Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation Dexuan Cui
2019-08-07 15:22 ` Michael Kelley
2019-08-07 23:09 ` Dexuan Cui
2019-07-31 17:52 ` Dexuan Cui [this message]
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