linux-kernel - [PATCH 1/1] Drivers: hv: vmbus: Add device and vendor ID to vmbus devices

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Message-Id: <1418856744-16359-1-git-send-email-kys@microsoft.com>
Date:	Wed, 17 Dec 2014 14:52:24 -0800
From:	"K. Y. Srinivasan" <kys@...rosoft.com>
To:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
	jasowang@...hat.com
Cc:	"K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 1/1] Drivers: hv: vmbus: Add device and vendor ID to vmbus devices

Add vendor and device ID attributes to vmbus devices. This would allow us to
support vmbus based devices that can support guest RDMA.

Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 drivers/hv/vmbus_drv.c |   20 ++++++++++++++++++++
 include/linux/hyperv.h |    2 ++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 4d6b269..215aac9 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -385,6 +385,24 @@ static ssize_t in_write_bytes_avail_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(in_write_bytes_avail);
 
+static ssize_t vendor_show(struct device *dev,
+			   struct device_attribute *dev_atttr,
+			   char *buf)
+{
+	struct hv_device *hv_dev = device_to_hv_device(dev);
+	return sprintf(buf, "0x%x\n", hv_dev->vendor_id);
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t device_show(struct device *dev,
+			   struct device_attribute *dev_atttr,
+			   char *buf)
+{
+	struct hv_device *hv_dev = device_to_hv_device(dev);
+	return sprintf(buf, "0x%x\n", hv_dev->device_id);
+}
+static DEVICE_ATTR_RO(device);
+
 /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
 static struct attribute *vmbus_attrs[] = {
 	&dev_attr_id.attr,
@@ -409,6 +427,8 @@ static struct attribute *vmbus_attrs[] = {
 	&dev_attr_in_write_index.attr,
 	&dev_attr_in_read_bytes_avail.attr,
 	&dev_attr_in_write_bytes_avail.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_device.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(vmbus);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 476c685..6fe4dfe 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -891,6 +891,8 @@ struct hv_device {
 
 	/* the device instance id of this device */
 	uuid_le dev_instance;
+	u16 vendor_id;
+	u16 device_id;
 
 	struct device device;
 
-- 
1.7.4.1

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