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From: Tony Nguyen <anthony.l.nguyen@intel.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [next-queue v4 01/12] ice: support basic E-Switch mode control
Date: Thu, 19 Aug 2021 17:08:48 -0700	[thread overview]
Message-ID: <20210820000859.680522-2-anthony.l.nguyen@intel.com> (raw)
In-Reply-To: <20210820000859.680522-1-anthony.l.nguyen@intel.com>

From: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>

Write set and get eswitch mode functions used by devlink
ops. Use new pf struct member eswitch_mode to track current
eswitch mode in driver.

Changing eswitch mode is only allowed when there are no
VFs created.

Create new file for eswitch related code.

Add config flag ICE_SWITCHDEV to allow user to choose if
switchdev support should be enabled or disabled.

Use case examples:
- show current eswitch mode ('legacy' is the default one)
[root at localhost]# devlink dev eswitch show pci/0000:03:00.1
pci/0000:03:00.1: mode legacy

- move to 'switchdev' mode
[root at localhost]# devlink dev eswitch set pci/0000:03:00.1 mode
switchdev
[root at localhost]# devlink dev eswitch show pci/0000:03:00.1
pci/0000:03:00.1: mode switchdev

- create 2 VFs
[root at localhost]# echo 2 > /sys/class/net/ens4f1/device/sriov_numvfs

- unsuccessful attempt to change eswitch mode while VFs are created
[root at localhost]# devlink dev eswitch set pci/0000:03:00.1 mode legacy
devlink answers: Operation not supported

- destroy VFs
[root at localhost]# echo 0 > /sys/class/net/ens4f1/device/sriov_numvfs

- restore 'legacy' mode
[root at localhost]# devlink dev eswitch set pci/0000:03:00.1 mode legacy
[root at localhost]# devlink dev eswitch show pci/0000:03:00.1
pci/0000:03:00.1: mode legacy

Co-developed-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
---
 drivers/net/ethernet/intel/Kconfig           | 14 +++++
 drivers/net/ethernet/intel/ice/Makefile      |  1 +
 drivers/net/ethernet/intel/ice/ice.h         |  1 +
 drivers/net/ethernet/intel/ice/ice_devlink.c |  3 +
 drivers/net/ethernet/intel/ice/ice_eswitch.c | 62 ++++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_eswitch.h | 34 +++++++++++
 6 files changed, 115 insertions(+)
 create mode 100644 drivers/net/ethernet/intel/ice/ice_eswitch.c
 create mode 100644 drivers/net/ethernet/intel/ice/ice_eswitch.h

diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index b0b6f90deb7d..88db7fdae8e3 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -313,6 +313,20 @@ config ICE
 	  To compile this driver as a module, choose M here. The module
 	  will be called ice.
 
+config ICE_SWITCHDEV
+	bool "Switchdev Support"
+	default y
+	depends on ICE && NET_SWITCHDEV
+	help
+	  Switchdev support provides internal SRIOV packet steering and switching.
+
+	  To enable it on running kernel use devlink tool:
+	  #devlink dev eswitch set pci/0000:XX:XX.X mode switchdev
+
+	  Say Y here if you want to use Switchdev in the driver.
+
+	  If unsure, say N.
+
 config FM10K
 	tristate "Intel(R) FM10000 Ethernet Switch Host Interface Support"
 	default n
diff --git a/drivers/net/ethernet/intel/ice/Makefile b/drivers/net/ethernet/intel/ice/Makefile
index 4f538cdf42c1..0545594c80ba 100644
--- a/drivers/net/ethernet/intel/ice/Makefile
+++ b/drivers/net/ethernet/intel/ice/Makefile
@@ -33,3 +33,4 @@ ice-$(CONFIG_PTP_1588_CLOCK) += ice_ptp.o ice_ptp_hw.o
 ice-$(CONFIG_DCB) += ice_dcb.o ice_dcb_nl.o ice_dcb_lib.o
 ice-$(CONFIG_RFS_ACCEL) += ice_arfs.o
 ice-$(CONFIG_XDP_SOCKETS) += ice_xsk.o
+ice-$(CONFIG_ICE_SWITCHDEV) += ice_eswitch.o
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index b3cb27e7d39e..abdd87ce9e69 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -431,6 +431,7 @@ struct ice_pf {
 
 	struct ice_vsi **vsi;		/* VSIs created by the driver */
 	struct ice_sw *first_sw;	/* first switch created by firmware */
+	u16 eswitch_mode;		/* current mode of eswitch */
 	/* Virtchnl/SR-IOV config info */
 	struct ice_vf *vf;
 	u16 num_alloc_vfs;		/* actual number of VFs allocated */
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index e9c66e99d92d..7d5468b36a47 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -4,6 +4,7 @@
 #include "ice.h"
 #include "ice_lib.h"
 #include "ice_devlink.h"
+#include "ice_eswitch.h"
 #include "ice_fw_update.h"
 
 /* context for devlink info version reporting */
@@ -454,6 +455,8 @@ ice_devlink_flash_update(struct devlink *devlink,
 
 static const struct devlink_ops ice_devlink_ops = {
 	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
+	.eswitch_mode_get = ice_eswitch_mode_get,
+	.eswitch_mode_set = ice_eswitch_mode_set,
 	.info_get = ice_devlink_info_get,
 	.flash_update = ice_devlink_flash_update,
 };
diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
new file mode 100644
index 000000000000..1370c41b77ab
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019-2021, Intel Corporation. */
+
+#include "ice.h"
+#include "ice_eswitch.h"
+#include "ice_devlink.h"
+
+/**
+ * ice_eswitch_mode_set - set new eswitch mode
+ * @devlink: pointer to devlink structure
+ * @mode: eswitch mode to switch to
+ * @extack: pointer to extack structure
+ */
+int
+ice_eswitch_mode_set(struct devlink *devlink, u16 mode,
+		     struct netlink_ext_ack *extack)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+
+	if (pf->eswitch_mode == mode)
+		return 0;
+
+	if (pf->num_alloc_vfs) {
+		dev_info(ice_pf_to_dev(pf), "Changing eswitch mode is allowed only if there is no VFs created");
+		NL_SET_ERR_MSG_MOD(extack, "Changing eswitch mode is allowed only if there is no VFs created");
+		return -EOPNOTSUPP;
+	}
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		dev_info(ice_pf_to_dev(pf), "PF %d changed eswitch mode to legacy",
+			 pf->hw.pf_id);
+		NL_SET_ERR_MSG_MOD(extack, "Changed eswitch mode to legacy");
+		break;
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+	{
+		dev_info(ice_pf_to_dev(pf), "PF %d changed eswitch mode to switchdev",
+			 pf->hw.pf_id);
+		NL_SET_ERR_MSG_MOD(extack, "Changed eswitch mode to switchdev");
+		break;
+	}
+	default:
+		NL_SET_ERR_MSG_MOD(extack, "Unknown eswitch mode");
+		return -EINVAL;
+	}
+
+	pf->eswitch_mode = mode;
+	return 0;
+}
+
+/**
+ * ice_eswitch_mode_get - get current eswitch mode
+ * @devlink: pointer to devlink structure
+ * @mode: output parameter for current eswitch mode
+ */
+int ice_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+
+	*mode = pf->eswitch_mode;
+	return 0;
+}
diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.h b/drivers/net/ethernet/intel/ice/ice_eswitch.h
new file mode 100644
index 000000000000..0aa6fb7e0c4e
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2019-2021, Intel Corporation. */
+
+#ifndef _ICE_ESWITCH_H_
+#define _ICE_ESWITCH_H_
+#include <net/devlink.h>
+
+#ifdef CONFIG_ICE_SWITCHDEV
+int ice_eswitch_mode_get(struct devlink *devlink, u16 *mode);
+int
+ice_eswitch_mode_set(struct devlink *devlink, u16 mode,
+		     struct netlink_ext_ack *extack);
+bool ice_is_eswitch_mode_switchdev(struct ice_pf *pf);
+#else /* CONFIG_ICE_SWITCHDEV */
+static inline int
+ice_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	return DEVLINK_ESWITCH_MODE_LEGACY;
+}
+
+static inline int
+ice_eswitch_mode_set(struct devlink *devlink, u16 mode,
+		     struct netlink_ext_ack *extack)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline bool
+ice_is_eswitch_mode_switchdev(struct ice_pf *pf)
+{
+	return false;
+}
+#endif /* CONFIG_ICE_SWITCHDEV */
+#endif
-- 
2.26.2


  reply	other threads:[~2021-08-20  0:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-20  0:08 [Intel-wired-lan] [next-queue v4 00/12] Add switchdev driver model for ice driver Tony Nguyen
2021-08-20  0:08 ` Tony Nguyen [this message]
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 02/12] ice: Move devlink port to PF/VF struct Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 03/12] ice: introduce VF port representor Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 04/12] ice: allow process VF opcodes in different ways Tony Nguyen
2021-09-01 10:43   ` Penigalapati, Sandeep
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 05/12] ice: manage VSI antispoof and destination override Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 06/12] ice: allow changing lan_en and lb_en on dflt rules Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 07/12] ice: set and release switchdev environment Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 08/12] ice: introduce new type of VSI for switchdev Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 09/12] ice: enable/disable switchdev when managing VFs Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 10/12] ice: rebuild switchdev when resetting all VFs Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 11/12] ice: switchdev slow path Tony Nguyen
2021-08-20  0:08 ` [Intel-wired-lan] [next-queue v4 12/12] ice: add port representor ethtool ops and stats Tony Nguyen
2021-09-01 10:41   ` Penigalapati, Sandeep

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