net/i40e: support link status notification

Add an API to expose the ability, that PF can notify VF
when link status changes, to APP.
So if PF APP doesn't want to enable interruption but check
link status by itself, PF APP can let VF know link status
changed.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Vincent Jardin <vincent.jardin@6wind.com>

drivers/net/i40e/Makefile

@@ -1,6 +1,6 @@
 #   BSD LICENSE
 #
-#   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+#   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
 #   All rights reserved.
 #
 #   Redistribution and use in source and binary forms, with or without
@@ -112,6 +112,8 @@ ifeq ($(findstring RTE_MACHINE_CPUFLAG_SSE4_1,$(CFLAGS)),)
 CFLAGS_i40e_rxtx_vec_sse.o += -msse4.1
 endif
 
+# install this header file
+SYMLINK-$(CONFIG_RTE_LIBRTE_I40E_PMD)-include := rte_pmd_i40e.h
 
 # this lib depends upon:
 DEPDIRS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += lib/librte_eal lib/librte_ether

drivers/net/i40e/i40e_ethdev.c

@@ -63,6 +63,7 @@
 #include "i40e_rxtx.h"
 #include "i40e_pf.h"
 #include "i40e_regs.h"
+#include "rte_pmd_i40e.h"
 
 #define ETH_I40E_FLOATING_VEB_ARG	"enable_floating_veb"
 #define ETH_I40E_FLOATING_VEB_LIST_ARG	"floating_veb_list"
@@ -10219,3 +10220,40 @@ i40e_filter_restore(struct i40e_pf *pf)
 	i40e_tunnel_filter_restore(pf);
 	i40e_fdir_filter_restore(pf);
 }
+
+static int
+is_i40e_pmd(const char *driver_name)
+{
+	if (!strstr(driver_name, "i40e"))
+		return -ENOTSUP;
+
+	if (strstr(driver_name, "i40e_vf"))
+		return -ENOTSUP;
+
+	return 0;
+}
+
+int
+rte_pmd_i40e_ping_vfs(uint8_t port, uint16_t vf)
+{
+	struct rte_eth_dev *dev;
+	struct i40e_pf *pf;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port, -ENODEV);
+
+	dev = &rte_eth_devices[port];
+
+	if (is_i40e_pmd(dev->data->drv_name))
+		return -ENOTSUP;
+
+	pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	if (vf >= pf->vf_num || !pf->vfs) {
+		PMD_DRV_LOG(ERR, "Invalid argument.");
+		return -EINVAL;
+	}
+
+	i40e_notify_vf_link_status(dev, &pf->vfs[vf]);
+
+	return 0;
+}

drivers/net/i40e/i40e_pf.c

@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -897,7 +897,7 @@ i40e_pf_host_process_cmd_cfg_pvid(struct i40e_pf_vf *vf,
 	return ret;
 }
 
-static void
+void
 i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)
 {
 	struct i40e_virtchnl_pf_event event;

drivers/net/i40e/i40e_pf.h

@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -123,5 +123,7 @@ void i40e_pf_host_handle_vf_msg(struct rte_eth_dev *dev,
 				uint8_t *msg, uint16_t msglen);
 int i40e_pf_host_init(struct rte_eth_dev *dev);
 int i40e_pf_host_uninit(struct rte_eth_dev *dev);
+void i40e_notify_vf_link_status(struct rte_eth_dev *dev,
+				struct i40e_pf_vf *vf);
 
 #endif /* _I40E_PF_H_ */

drivers/net/i40e/rte_pmd_i40e.h

@@ -0,0 +1,61 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) 2017 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PMD_I40E_H_
+#define _PMD_I40E_H_
+
+/**
+ * @file rte_pmd_i40e.h
+ *
+ * i40e PMD specific functions.
+ *
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ */
+
+#include <rte_ethdev.h>
+
+/**
+ * Notify VF when PF link status changes.
+ *
+ * @param port
+ *   The port identifier of the Ethernet device.
+ * @param vf
+ *   VF id.
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if *port* invalid.
+ *   - (-EINVAL) if *vf* invalid.
+ */
+int rte_pmd_i40e_ping_vfs(uint8_t port, uint16_t vf);
+
+#endif /* _PMD_I40E_H_ */

drivers/net/i40e/rte_pmd_i40e_version.map

@@ -2,3 +2,10 @@ DPDK_2.0 {
 
 	local: *;
 };
+
+DPDK_17.02 {
+	global:
+
+	rte_pmd_i40e_ping_vfs;
+
+} DPDK_2.0;