[dpdk-dev] [PATCH v4 7/7] hv: add kernel patch

[Stephen Hemminger <stephen@networkplumber.org>]

From: Stephen Hemminger <shemming@brocade.com>

For users using non latest kernels, put kernel patch in for
them to use.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 .../linuxapp/hv_uio/vmbus-get-pages.patch          | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch

diff --git a/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch b/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch
new file mode 100644
index 0000000..ae27fbd
--- /dev/null
+++ b/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch
@@ -0,0 +1,55 @@
+hyper-v: allow access to vmbus from userspace driver
+
+This is patch from  to allow access to hyper-v vmbus from UIO driver.
+
+Signed-off-by: Stas Egorov <segorov@mirantis.com>
+Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
+
+---
+v2 - simplify and rename to vmbus_get_monitor_pages
+
+ drivers/hv/connection.c |   20 +++++++++++++++++---
+ include/linux/hyperv.h  |    3 +++
+ 2 files changed, 20 insertions(+), 3 deletions(-)
+
+--- a/drivers/hv/connection.c	2015-02-03 10:58:51.751752450 -0800
++++ b/drivers/hv/connection.c	2015-02-04 14:59:51.636194383 -0800
+@@ -64,6 +64,15 @@ static __u32 vmbus_get_next_version(__u3
+ 	}
+ }
+
++void vmbus_get_monitor_pages(unsigned long *int_page,
++			     unsigned long monitor_pages[2])
++{
++	*int_page = (unsigned long)vmbus_connection.int_page;
++	monitor_pages[0] = (unsigned long)vmbus_connection.monitor_pages[0];
++	monitor_pages[1] = (unsigned long)vmbus_connection.monitor_pages[1];
++}
++EXPORT_SYMBOL_GPL(vmbus_get_monitor_pages);
++
+ static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo,
+ 					__u32 version)
+ {
+@@ -347,10 +356,7 @@ static void process_chn_event(u32 relid)
+ 			else
+ 				bytes_to_read = 0;
+ 		} while (read_state && (bytes_to_read != 0));
+-	} else {
+-		pr_err("no channel callback for relid - %u\n", relid);
+ 	}
+-
+ }
+
+ /*
+--- a/include/linux/hyperv.h	2015-02-03 10:58:51.751752450 -0800
++++ b/include/linux/hyperv.h	2015-02-04 15:00:26.388355012 -0800
+@@ -868,6 +868,9 @@ extern int vmbus_recvpacket_raw(struct v
+
+ extern void vmbus_ontimer(unsigned long data);
+
++extern void vmbus_get_monitor_pages(unsigned long *int_page,
++				    unsigned long monitor_pages[2]);
++
+ /* Base driver object */
+ struct hv_driver {
+ 	const char *name;
-- 
2.1.4