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 v4 07/12] Drivers: hv: vmbus: Implement suspend/resume for VSC drivers for hibernation
Date: Tue, 3 Sep 2019 00:23:22 +0000 [thread overview]
Message-ID: <1567470139-119355-8-git-send-email-decui@microsoft.com> (raw)
In-Reply-To: <1567470139-119355-1-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 | 46 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/hyperv.h | 3 +++
2 files changed, 49 insertions(+)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 2ef375c..a30c70a 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 +963,14 @@ static void vmbus_device_release(struct device *device)
kfree(hv_dev);
}
+/*
+ * Note: we must use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS rather than
+ * SET_SYSTEM_SLEEP_PM_OPS: see the comment before vmbus_bus_pm.
+ */
+static const struct dev_pm_ops vmbus_pm = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(vmbus_suspend, vmbus_resume)
+};
+
/* The one and only one */
static struct bus_type hv_bus = {
.name = "vmbus",
@@ -936,6 +981,7 @@ 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 2d39248..8a60e77 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -1157,6 +1157,9 @@ 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
next prev parent reply other threads:[~2019-09-03 0:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-03 0:23 [PATCH v4 00/12] Enhance the hv_vmbus driver to support hibernation Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 01/12] x86/hyper-v: Suspend/resume the hypercall page for hibernation Dexuan Cui
2019-09-05 15:44 ` Sasha Levin
2019-09-05 19:59 ` Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 02/12] x86/hyper-v: Implement hv_is_hibernation_supported() Dexuan Cui
2019-09-04 16:43 ` Michael Kelley
2019-09-03 0:23 ` [PATCH v4 03/12] clocksource/drivers: Suspend/resume Hyper-V clocksource for hibernation Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 04/12] Drivers: hv: vmbus: Break out synic enable and disable operations Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 05/12] Drivers: hv: vmbus: Suspend/resume the synic for hibernation Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 06/12] Drivers: hv: vmbus: Add a helper function is_sub_channel() Dexuan Cui
2019-09-03 0:23 ` Dexuan Cui [this message]
2019-09-03 0:23 ` [PATCH v4 08/12] Drivers: hv: vmbus: Ignore the offers when resuming from hibernation Dexuan Cui
2019-09-04 16:43 ` Michael Kelley
2019-09-03 0:23 ` [PATCH v4 09/12] Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 10/12] Drivers: hv: vmbus: Clean up hv_sock channels by force upon suspend Dexuan Cui
2019-09-03 0:23 ` [PATCH v4 11/12] Drivers: hv: vmbus: Suspend after cleaning up hv_sock and sub channels Dexuan Cui
2019-09-04 16:44 ` Michael Kelley
2019-09-03 0:23 ` [PATCH v4 12/12] Drivers: hv: vmbus: Resume after fixing up old primary channels Dexuan Cui
2019-09-04 16:45 ` Michael Kelley
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