[next-queue v3 PATCH 0/7]i40e: Add VF Port Representator support for SR-IOV VFs

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* [next-queue v3 PATCH 0/7]i40e: Add VF Port Representator support for SR-IOV VFs
@ 2017-01-10  0:59 ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

This patchset is against dev-queue branch of Jeff Kirsher's next-queue git tree.

- Patch 1 introduces devlink interface to get/set the mode of SRIOV switch.
- Patch 2 adds support to create VF port representor(VFPR) netdevs associated
  with SR-IOV VFs that can be used to control/configure VFs from PF name space.
- Patch 3 enables syncing link state between VFs and VFPRs.
- Patch 4 adds a new type to metadata_dst to allow passing VF id to lower device.
- Patch 5 adds TX and RX support to VFPR netdevs.
- Patch 6 enables HW and SW VFPR statistics to be exposed via netlink on VFPR
  netdevs.
- Patch 7 adds support to get switch id and port number for VFPR netdevs.


Sridhar Samudrala (7):
  i40e: Introduce devlink interface.
  i40e: Introduce VF Port Representator(VFPR) netdevs.
  i40e: Sync link state between VFs and VFPRs
  net: store port/representator id in metadata_dst
  i40e: Add TX and RX support in switchdev mode.
  i40e: Add support for exposing VF port statistics via VFPR netdev on
    the host.
  i40e: Add support to get switch id and port number for VFPR netdevs

 drivers/net/ethernet/intel/Kconfig                 |   1 +
 drivers/net/ethernet/intel/i40e/i40e.h             |   5 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 131 +++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        | 146 +++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.h        |   2 +
 drivers/net/ethernet/intel/i40e/i40e_type.h        |   3 +
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 370 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  25 ++
 include/net/dst_metadata.h                         |  41 ++-
 net/core/dst.c                                     |  15 +-
 net/core/filter.c                                  |   1 +
 net/ipv4/ip_tunnel_core.c                          |   6 +-
 net/openvswitch/flow_netlink.c                     |   4 +-
 13 files changed, 715 insertions(+), 35 deletions(-)

-- 
2.5.5

^ permalink raw reply	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 0/7]i40e: Add VF Port Representator support for SR-IOV VFs
@ 2017-01-10  0:59 ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

This patchset is against dev-queue branch of Jeff Kirsher's next-queue git tree.

- Patch 1 introduces devlink interface to get/set the mode of SRIOV switch.
- Patch 2 adds support to create VF port representor(VFPR) netdevs associated
  with SR-IOV VFs that can be used to control/configure VFs from PF name space.
- Patch 3 enables syncing link state between VFs and VFPRs.
- Patch 4 adds a new type to metadata_dst to allow passing VF id to lower device.
- Patch 5 adds TX and RX support to VFPR netdevs.
- Patch 6 enables HW and SW VFPR statistics to be exposed via netlink on VFPR
  netdevs.
- Patch 7 adds support to get switch id and port number for VFPR netdevs.


Sridhar Samudrala (7):
  i40e: Introduce devlink interface.
  i40e: Introduce VF Port Representator(VFPR) netdevs.
  i40e: Sync link state between VFs and VFPRs
  net: store port/representator id in metadata_dst
  i40e: Add TX and RX support in switchdev mode.
  i40e: Add support for exposing VF port statistics via VFPR netdev on
    the host.
  i40e: Add support to get switch id and port number for VFPR netdevs

 drivers/net/ethernet/intel/Kconfig                 |   1 +
 drivers/net/ethernet/intel/i40e/i40e.h             |   5 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 131 +++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        | 146 +++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.h        |   2 +
 drivers/net/ethernet/intel/i40e/i40e_type.h        |   3 +
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 370 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  25 ++
 include/net/dst_metadata.h                         |  41 ++-
 net/core/dst.c                                     |  15 +-
 net/core/filter.c                                  |   1 +
 net/ipv4/ip_tunnel_core.c                          |   6 +-
 net/openvswitch/flow_netlink.c                     |   4 +-
 13 files changed, 715 insertions(+), 35 deletions(-)

-- 
2.5.5


^ permalink raw reply	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 1/7] i40e: Introduce devlink interface.
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

Add initial devlink support to get/set the mode of SRIOV switch.
This patch sets the default mode as 'legacy' and enables getting the mode
and and setting it to 'legacy'.

The switch mode can be get/set via following 'devlink' commands.

# devlink dev eswitch show pci/0000:05:00.0
pci/0000:05:00.0: mode legacy
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
devlink answers: Operation not supported
# devlink dev eswitch set pci/0000:05:00.0 mode legacy
# devlink dev eswitch show pci/0000:05:00.0
pci/0000:05:00.0: mode legacy

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/Kconfig          |  1 +
 drivers/net/ethernet/intel/i40e/i40e.h      |  3 ++
 drivers/net/ethernet/intel/i40e/i40e_main.c | 80 ++++++++++++++++++++++++++---
 3 files changed, 76 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 1349b45..0dbb87e 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -215,6 +215,7 @@ config I40E
 	tristate "Intel(R) Ethernet Controller XL710 Family support"
 	imply PTP_1588_CLOCK
 	depends on PCI
+	depends on MAY_USE_DEVLINK
 	---help---
 	  This driver supports Intel(R) Ethernet Controller XL710 Family of
 	  devices.  For more information on how to identify your adapter, go
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 1b0fada..b58c56c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -54,6 +54,8 @@
 #include <linux/clocksource.h>
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
+#include <net/devlink.h>
+
 #include "i40e_type.h"
 #include "i40e_prototype.h"
 #ifdef I40E_FCOE
@@ -476,6 +478,7 @@ struct i40e_pf {
 	u32 ioremap_len;
 	u32 fd_inv;
 	u16 phy_led_val;
+	enum devlink_eswitch_mode eswitch_mode;
 };
 
 /**
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index cb8edd8..ef22b32 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11300,6 +11300,57 @@ static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
 }
 
 /**
+ * i40e_devlink_eswitch_mode_get
+ *
+ * @devlink: pointer to devlink struct
+ * @mode: sr-iov switch mode pointer
+ *
+ * Returns the switch mode of the associated PF in the @mode pointer.
+ */
+static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	struct i40e_pf *pf = devlink_priv(devlink);
+
+	*mode = pf->eswitch_mode;
+
+	return 0;
+}
+
+/**
+ * i40e_devlink_eswitch_mode_set
+ *
+ * @devlink: pointer to devlink struct
+ * @mode: sr-iov switch mode
+ *
+ * Set the switch mode of the associated PF.
+ * Returns 0 on success and -EOPNOTSUPP on error.
+ */
+static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
+{
+	struct i40e_pf *pf = devlink_priv(devlink);
+	int err = 0;
+
+	if (mode == pf->eswitch_mode)
+		goto done;
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		pf->eswitch_mode = mode;
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+done:
+	return err;
+}
+
+static const struct devlink_ops i40e_devlink_ops = {
+	.eswitch_mode_get = i40e_devlink_eswitch_mode_get,
+	.eswitch_mode_set = i40e_devlink_eswitch_mode_set,
+};
+
+/**
  * i40e_probe - Device initialization routine
  * @pdev: PCI device information struct
  * @ent: entry in i40e_pci_tbl
@@ -11316,6 +11367,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct i40e_pf *pf;
 	struct i40e_hw *hw;
 	static u16 pfs_found;
+	struct devlink *devlink;
 	u16 wol_nvm_bits;
 	u16 link_status;
 	int err;
@@ -11349,20 +11401,28 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_enable_pcie_error_reporting(pdev);
 	pci_set_master(pdev);
 
+	devlink = devlink_alloc(&i40e_devlink_ops, sizeof(*pf));
+	if (!devlink) {
+		dev_err(&pdev->dev, "devlink_alloc failed\n");
+		err = -ENOMEM;
+		goto err_devlink_alloc;
+	}
+
 	/* Now that we have a PCI connection, we need to do the
 	 * low level device setup.  This is primarily setting up
 	 * the Admin Queue structures and then querying for the
 	 * device's current profile information.
 	 */
-	pf = kzalloc(sizeof(*pf), GFP_KERNEL);
-	if (!pf) {
-		err = -ENOMEM;
-		goto err_pf_alloc;
-	}
+	pf = devlink_priv(devlink);
 	pf->next_vsi = 0;
 	pf->pdev = pdev;
 	set_bit(__I40E_DOWN, &pf->state);
 
+	pf->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
+	err = devlink_register(devlink, &pdev->dev);
+	if (err)
+		goto err_devlink_register;
+
 	hw = &pf->hw;
 	hw->back = pf;
 
@@ -11836,8 +11896,10 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_pf_reset:
 	iounmap(hw->hw_addr);
 err_ioremap:
-	kfree(pf);
-err_pf_alloc:
+	devlink_unregister(devlink);
+err_devlink_register:
+	devlink_free(devlink);
+err_devlink_alloc:
 	pci_disable_pcie_error_reporting(pdev);
 	pci_release_mem_regions(pdev);
 err_pci_reg:
@@ -11859,6 +11921,7 @@ static void i40e_remove(struct pci_dev *pdev)
 {
 	struct i40e_pf *pf = pci_get_drvdata(pdev);
 	struct i40e_hw *hw = &pf->hw;
+	struct devlink *devlink = priv_to_devlink(pf);
 	i40e_status ret_code;
 	int i;
 
@@ -11947,7 +12010,8 @@ static void i40e_remove(struct pci_dev *pdev)
 	kfree(pf->vsi);
 
 	iounmap(hw->hw_addr);
-	kfree(pf);
+	devlink_unregister(devlink);
+	devlink_free(devlink);
 	pci_release_mem_regions(pdev);
 
 	pci_disable_pcie_error_reporting(pdev);
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 1/7] i40e: Introduce devlink interface.
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

Add initial devlink support to get/set the mode of SRIOV switch.
This patch sets the default mode as 'legacy' and enables getting the mode
and and setting it to 'legacy'.

The switch mode can be get/set via following 'devlink' commands.

# devlink dev eswitch show pci/0000:05:00.0
pci/0000:05:00.0: mode legacy
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
devlink answers: Operation not supported
# devlink dev eswitch set pci/0000:05:00.0 mode legacy
# devlink dev eswitch show pci/0000:05:00.0
pci/0000:05:00.0: mode legacy

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/Kconfig          |  1 +
 drivers/net/ethernet/intel/i40e/i40e.h      |  3 ++
 drivers/net/ethernet/intel/i40e/i40e_main.c | 80 ++++++++++++++++++++++++++---
 3 files changed, 76 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 1349b45..0dbb87e 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -215,6 +215,7 @@ config I40E
 	tristate "Intel(R) Ethernet Controller XL710 Family support"
 	imply PTP_1588_CLOCK
 	depends on PCI
+	depends on MAY_USE_DEVLINK
 	---help---
 	  This driver supports Intel(R) Ethernet Controller XL710 Family of
 	  devices.  For more information on how to identify your adapter, go
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 1b0fada..b58c56c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -54,6 +54,8 @@
 #include <linux/clocksource.h>
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
+#include <net/devlink.h>
+
 #include "i40e_type.h"
 #include "i40e_prototype.h"
 #ifdef I40E_FCOE
@@ -476,6 +478,7 @@ struct i40e_pf {
 	u32 ioremap_len;
 	u32 fd_inv;
 	u16 phy_led_val;
+	enum devlink_eswitch_mode eswitch_mode;
 };
 
 /**
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index cb8edd8..ef22b32 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11300,6 +11300,57 @@ static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
 }
 
 /**
+ * i40e_devlink_eswitch_mode_get
+ *
+ * @devlink: pointer to devlink struct
+ * @mode: sr-iov switch mode pointer
+ *
+ * Returns the switch mode of the associated PF in the @mode pointer.
+ */
+static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	struct i40e_pf *pf = devlink_priv(devlink);
+
+	*mode = pf->eswitch_mode;
+
+	return 0;
+}
+
+/**
+ * i40e_devlink_eswitch_mode_set
+ *
+ * @devlink: pointer to devlink struct
+ * @mode: sr-iov switch mode
+ *
+ * Set the switch mode of the associated PF.
+ * Returns 0 on success and -EOPNOTSUPP on error.
+ */
+static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
+{
+	struct i40e_pf *pf = devlink_priv(devlink);
+	int err = 0;
+
+	if (mode == pf->eswitch_mode)
+		goto done;
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		pf->eswitch_mode = mode;
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+done:
+	return err;
+}
+
+static const struct devlink_ops i40e_devlink_ops = {
+	.eswitch_mode_get = i40e_devlink_eswitch_mode_get,
+	.eswitch_mode_set = i40e_devlink_eswitch_mode_set,
+};
+
+/**
  * i40e_probe - Device initialization routine
  * @pdev: PCI device information struct
  * @ent: entry in i40e_pci_tbl
@@ -11316,6 +11367,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct i40e_pf *pf;
 	struct i40e_hw *hw;
 	static u16 pfs_found;
+	struct devlink *devlink;
 	u16 wol_nvm_bits;
 	u16 link_status;
 	int err;
@@ -11349,20 +11401,28 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_enable_pcie_error_reporting(pdev);
 	pci_set_master(pdev);
 
+	devlink = devlink_alloc(&i40e_devlink_ops, sizeof(*pf));
+	if (!devlink) {
+		dev_err(&pdev->dev, "devlink_alloc failed\n");
+		err = -ENOMEM;
+		goto err_devlink_alloc;
+	}
+
 	/* Now that we have a PCI connection, we need to do the
 	 * low level device setup.  This is primarily setting up
 	 * the Admin Queue structures and then querying for the
 	 * device's current profile information.
 	 */
-	pf = kzalloc(sizeof(*pf), GFP_KERNEL);
-	if (!pf) {
-		err = -ENOMEM;
-		goto err_pf_alloc;
-	}
+	pf = devlink_priv(devlink);
 	pf->next_vsi = 0;
 	pf->pdev = pdev;
 	set_bit(__I40E_DOWN, &pf->state);
 
+	pf->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
+	err = devlink_register(devlink, &pdev->dev);
+	if (err)
+		goto err_devlink_register;
+
 	hw = &pf->hw;
 	hw->back = pf;
 
@@ -11836,8 +11896,10 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_pf_reset:
 	iounmap(hw->hw_addr);
 err_ioremap:
-	kfree(pf);
-err_pf_alloc:
+	devlink_unregister(devlink);
+err_devlink_register:
+	devlink_free(devlink);
+err_devlink_alloc:
 	pci_disable_pcie_error_reporting(pdev);
 	pci_release_mem_regions(pdev);
 err_pci_reg:
@@ -11859,6 +11921,7 @@ static void i40e_remove(struct pci_dev *pdev)
 {
 	struct i40e_pf *pf = pci_get_drvdata(pdev);
 	struct i40e_hw *hw = &pf->hw;
+	struct devlink *devlink = priv_to_devlink(pf);
 	i40e_status ret_code;
 	int i;
 
@@ -11947,7 +12010,8 @@ static void i40e_remove(struct pci_dev *pdev)
 	kfree(pf->vsi);
 
 	iounmap(hw->hw_addr);
-	kfree(pf);
+	devlink_unregister(devlink);
+	devlink_free(devlink);
 	pci_release_mem_regions(pdev);
 
 	pci_disable_pcie_error_reporting(pdev);
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 2/7] i40e: Introduce VF Port Representator(VFPR) netdevs.
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

VF Port Representator netdevs are created for each VF if the switch mode
is set to 'switchdev'. These netdevs can be used to control and configure
VFs from PFs namespace. They enable exposing VF statistics, configure and
monitor link state, mtu, filters, fdb/vlan entries etc. of VFs.
Broadcast filters are not enabled in switchdev mode.
VFPR netdevs inherit the mac address from the PF.

Sample script to create VF port representors
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip l show
297: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid 6805ca2e7268 state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
     vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
299: enp5s0f0-vf0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
300: enp5s0f0-vf1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c        |  21 ++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 153 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  14 ++
 3 files changed, 182 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ef22b32..06b85ec 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11328,13 +11328,32 @@ static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 {
 	struct i40e_pf *pf = devlink_priv(devlink);
-	int err = 0;
+	struct i40e_vf *vf;
+	int i, j, err = 0;
 
 	if (mode == pf->eswitch_mode)
 		goto done;
 
 	switch (mode) {
 	case DEVLINK_ESWITCH_MODE_LEGACY:
+		for (i = 0; i < pf->num_alloc_vfs; i++) {
+			vf = &pf->vf[i];
+			i40e_free_vfpr_netdev(vf);
+		}
+		pf->eswitch_mode = mode;
+		break;
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+		for (i = 0; i < pf->num_alloc_vfs; i++) {
+			vf = &pf->vf[i];
+			err = i40e_alloc_vfpr_netdev(vf, i);
+			if (err) {
+				for (j = 0; j < i; j++) {
+					vf = &pf->vf[j];
+					i40e_free_vfpr_netdev(vf);
+				}
+				goto done;
+			}
+		}
 		pf->eswitch_mode = mode;
 		break;
 	default:
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index cbbf864..f9927dc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -696,11 +696,15 @@ static int i40e_alloc_vsi_res(struct i40e_vf *vf, enum i40e_vsi_type type)
 					 "Could not add MAC filter %pM for VF %d\n",
 					vf->default_lan_addr.addr, vf->vf_id);
 		}
-		eth_broadcast_addr(broadcast);
-		f = i40e_add_mac_filter(vsi, broadcast);
-		if (!f)
-			dev_info(&pf->pdev->dev,
-				 "Could not allocate VF broadcast filter\n");
+
+		/* Add VF broadcast filter only in 'legacy' mode */
+		if (vsi->back->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY) {
+			eth_broadcast_addr(broadcast);
+			f = i40e_add_mac_filter(vsi, broadcast);
+			if (!f)
+				dev_info(&pf->pdev->dev,
+					 "Could not allocate VF broadcast filter\n");
+		}
 		spin_unlock_bh(&vsi->mac_filter_hash_lock);
 		i40e_write_rx_ctl(&pf->hw, I40E_VFQF_HENA1(0, vf->vf_id),
 				  (u32)hena);
@@ -1018,6 +1022,137 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
 }
 
 /**
+ * i40e_vfpr_netdev_open
+ * @dev: network interface device structure
+ *
+ * Called when vfpr netdevice is brought up.
+ **/
+static int i40e_vfpr_netdev_open(struct net_device *dev)
+{
+	return 0;
+}
+
+/**
+ * i40e_vfpr_netdev_stop
+ * @dev: network interface device structure
+ *
+ * Called when vfpr netdevice is brought down.
+ **/
+static int i40e_vfpr_netdev_stop(struct net_device *dev)
+{
+	return 0;
+}
+
+static const struct net_device_ops i40e_vfpr_netdev_ops = {
+	.ndo_open		= i40e_vfpr_netdev_open,
+	.ndo_stop		= i40e_vfpr_netdev_stop,
+};
+
+/**
+ * i40e_update_vf_broadcast_filter
+ * @vf: pointer to the VF structure
+ * @enable: boolean flag indicating add/delete
+ *
+ * add/delete VFs broadcast filter
+ **/
+void i40e_update_vf_broadcast_filter(struct i40e_vf *vf, bool enable)
+{
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[vf->lan_vsi_idx];
+	u8 broadcast[ETH_ALEN];
+	int err;
+
+	spin_lock_bh(&vsi->mac_filter_hash_lock);
+	eth_broadcast_addr(broadcast);
+	if (enable)
+		i40e_add_mac_filter(vsi, broadcast);
+	else
+		i40e_del_mac_filter(vsi, broadcast);
+	spin_unlock_bh(&vsi->mac_filter_hash_lock);
+
+	/* update broadcast filter */
+	err = i40e_sync_vsi_filters(vsi);
+	if (err)
+		dev_err(&pf->pdev->dev, "Unable to program bcast filter\n");
+}
+
+/**
+ * i40e_alloc_vfpr_netdev
+ * @vf: pointer to the VF structure
+ * @vf_num: VF number
+ *
+ * Create VF Port representor netdev
+ **/
+int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
+{
+	struct net_device *vfpr_netdev;
+	char netdev_name[IFNAMSIZ];
+	struct i40e_vfpr_netdev_priv *priv;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+	int err;
+
+	snprintf(netdev_name, IFNAMSIZ, "%s-vf%d", vsi->netdev->name, vf_num);
+	vfpr_netdev = alloc_netdev(sizeof(struct i40e_vfpr_netdev_priv),
+				   netdev_name, NET_NAME_UNKNOWN, ether_setup);
+	if (!vfpr_netdev) {
+		dev_err(&pf->pdev->dev, "alloc_netdev failed for vf:%d\n",
+			vf_num);
+		return -ENOMEM;
+	}
+
+	pf->vf[vf_num].vfpr_netdev = vfpr_netdev;
+
+	priv = netdev_priv(vfpr_netdev);
+	priv->vf = &pf->vf[vf_num];
+
+	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
+	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
+
+	netif_carrier_off(vfpr_netdev);
+	netif_tx_disable(vfpr_netdev);
+
+	err = register_netdev(vfpr_netdev);
+	if (err) {
+		dev_err(&pf->pdev->dev, "register_netdev failed for vf: %s\n",
+			vf->vfpr_netdev->name);
+		free_netdev(vfpr_netdev);
+		return err;
+	}
+
+	dev_info(&pf->pdev->dev, "VF Port representor(%s) created for VF %d\n",
+		 vf->vfpr_netdev->name, vf_num);
+
+	/* Delete broadcast filter for VF */
+	i40e_update_vf_broadcast_filter(vf, false);
+
+	return 0;
+}
+
+/**
+ * i40e_free_vfpr_netdev
+ * @vf: pointer to the VF structure
+ *
+ * Free VF Port representor netdev
+ **/
+void i40e_free_vfpr_netdev(struct i40e_vf *vf)
+{
+	struct i40e_pf *pf = vf->pf;
+
+	if (!vf->vfpr_netdev)
+		return;
+
+	dev_info(&pf->pdev->dev, "Freeing VF Port representor(%s)\n",
+		 vf->vfpr_netdev->name);
+
+	unregister_netdev(vf->vfpr_netdev);
+	free_netdev(vf->vfpr_netdev);
+
+	/* Add broadcast filter to VF */
+	i40e_update_vf_broadcast_filter(vf, true);
+}
+
+/**
  * i40e_free_vfs
  * @pf: pointer to the PF structure
  *
@@ -1058,6 +1193,9 @@ void i40e_free_vfs(struct i40e_pf *pf)
 			i40e_free_vf_res(&pf->vf[i]);
 		/* disable qp mappings */
 		i40e_disable_vf_mappings(&pf->vf[i]);
+
+		if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
+			i40e_free_vfpr_netdev(&pf->vf[i]);
 	}
 
 	kfree(pf->vf);
@@ -1125,6 +1263,11 @@ int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
 		/* VF resources get allocated during reset */
 		i40e_reset_vf(&vfs[i], false);
 
+		if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) {
+			ret = i40e_alloc_vfpr_netdev(&vfs[i], i);
+			if (ret)
+				goto err_alloc;
+		}
 	}
 	pf->num_alloc_vfs = num_alloc_vfs;
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 4012d06..25ce93c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -72,10 +72,21 @@ enum i40e_vf_capabilities {
 	I40E_VIRTCHNL_VF_CAP_IWARP,
 };
 
+/* VF Port representator netdev private structure */
+struct i40e_vfpr_netdev_priv {
+	struct i40e_vf *vf;
+};
+
 /* VF information structure */
 struct i40e_vf {
 	struct i40e_pf *pf;
 
+	/* VF Port representator netdev that allows control and configuration
+	 * of VFs from the host. Enables returning VF stats, configuring link
+	 * state, mtu, fdb/vlans etc.
+	 */
+	struct net_device *vfpr_netdev;
+
 	/* VF id in the PF space */
 	s16 vf_id;
 	/* all VF vsis connect to the same parent */
@@ -142,4 +153,7 @@ int i40e_ndo_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool enable);
 void i40e_vc_notify_link_state(struct i40e_pf *pf);
 void i40e_vc_notify_reset(struct i40e_pf *pf);
 
+int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num);
+void i40e_free_vfpr_netdev(struct i40e_vf *vf);
+
 #endif /* _I40E_VIRTCHNL_PF_H_ */
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 2/7] i40e: Introduce VF Port Representator(VFPR) netdevs.
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

VF Port Representator netdevs are created for each VF if the switch mode
is set to 'switchdev'. These netdevs can be used to control and configure
VFs from PFs namespace. They enable exposing VF statistics, configure and
monitor link state, mtu, filters, fdb/vlan entries etc. of VFs.
Broadcast filters are not enabled in switchdev mode.
VFPR netdevs inherit the mac address from the PF.

Sample script to create VF port representors
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip l show
297: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid 6805ca2e7268 state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
     vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
299: enp5s0f0-vf0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
300: enp5s0f0-vf1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c        |  21 ++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 153 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  14 ++
 3 files changed, 182 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ef22b32..06b85ec 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11328,13 +11328,32 @@ static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 {
 	struct i40e_pf *pf = devlink_priv(devlink);
-	int err = 0;
+	struct i40e_vf *vf;
+	int i, j, err = 0;
 
 	if (mode == pf->eswitch_mode)
 		goto done;
 
 	switch (mode) {
 	case DEVLINK_ESWITCH_MODE_LEGACY:
+		for (i = 0; i < pf->num_alloc_vfs; i++) {
+			vf = &pf->vf[i];
+			i40e_free_vfpr_netdev(vf);
+		}
+		pf->eswitch_mode = mode;
+		break;
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+		for (i = 0; i < pf->num_alloc_vfs; i++) {
+			vf = &pf->vf[i];
+			err = i40e_alloc_vfpr_netdev(vf, i);
+			if (err) {
+				for (j = 0; j < i; j++) {
+					vf = &pf->vf[j];
+					i40e_free_vfpr_netdev(vf);
+				}
+				goto done;
+			}
+		}
 		pf->eswitch_mode = mode;
 		break;
 	default:
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index cbbf864..f9927dc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -696,11 +696,15 @@ static int i40e_alloc_vsi_res(struct i40e_vf *vf, enum i40e_vsi_type type)
 					 "Could not add MAC filter %pM for VF %d\n",
 					vf->default_lan_addr.addr, vf->vf_id);
 		}
-		eth_broadcast_addr(broadcast);
-		f = i40e_add_mac_filter(vsi, broadcast);
-		if (!f)
-			dev_info(&pf->pdev->dev,
-				 "Could not allocate VF broadcast filter\n");
+
+		/* Add VF broadcast filter only in 'legacy' mode */
+		if (vsi->back->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY) {
+			eth_broadcast_addr(broadcast);
+			f = i40e_add_mac_filter(vsi, broadcast);
+			if (!f)
+				dev_info(&pf->pdev->dev,
+					 "Could not allocate VF broadcast filter\n");
+		}
 		spin_unlock_bh(&vsi->mac_filter_hash_lock);
 		i40e_write_rx_ctl(&pf->hw, I40E_VFQF_HENA1(0, vf->vf_id),
 				  (u32)hena);
@@ -1018,6 +1022,137 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
 }
 
 /**
+ * i40e_vfpr_netdev_open
+ * @dev: network interface device structure
+ *
+ * Called when vfpr netdevice is brought up.
+ **/
+static int i40e_vfpr_netdev_open(struct net_device *dev)
+{
+	return 0;
+}
+
+/**
+ * i40e_vfpr_netdev_stop
+ * @dev: network interface device structure
+ *
+ * Called when vfpr netdevice is brought down.
+ **/
+static int i40e_vfpr_netdev_stop(struct net_device *dev)
+{
+	return 0;
+}
+
+static const struct net_device_ops i40e_vfpr_netdev_ops = {
+	.ndo_open		= i40e_vfpr_netdev_open,
+	.ndo_stop		= i40e_vfpr_netdev_stop,
+};
+
+/**
+ * i40e_update_vf_broadcast_filter
+ * @vf: pointer to the VF structure
+ * @enable: boolean flag indicating add/delete
+ *
+ * add/delete VFs broadcast filter
+ **/
+void i40e_update_vf_broadcast_filter(struct i40e_vf *vf, bool enable)
+{
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[vf->lan_vsi_idx];
+	u8 broadcast[ETH_ALEN];
+	int err;
+
+	spin_lock_bh(&vsi->mac_filter_hash_lock);
+	eth_broadcast_addr(broadcast);
+	if (enable)
+		i40e_add_mac_filter(vsi, broadcast);
+	else
+		i40e_del_mac_filter(vsi, broadcast);
+	spin_unlock_bh(&vsi->mac_filter_hash_lock);
+
+	/* update broadcast filter */
+	err = i40e_sync_vsi_filters(vsi);
+	if (err)
+		dev_err(&pf->pdev->dev, "Unable to program bcast filter\n");
+}
+
+/**
+ * i40e_alloc_vfpr_netdev
+ * @vf: pointer to the VF structure
+ * @vf_num: VF number
+ *
+ * Create VF Port representor netdev
+ **/
+int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
+{
+	struct net_device *vfpr_netdev;
+	char netdev_name[IFNAMSIZ];
+	struct i40e_vfpr_netdev_priv *priv;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+	int err;
+
+	snprintf(netdev_name, IFNAMSIZ, "%s-vf%d", vsi->netdev->name, vf_num);
+	vfpr_netdev = alloc_netdev(sizeof(struct i40e_vfpr_netdev_priv),
+				   netdev_name, NET_NAME_UNKNOWN, ether_setup);
+	if (!vfpr_netdev) {
+		dev_err(&pf->pdev->dev, "alloc_netdev failed for vf:%d\n",
+			vf_num);
+		return -ENOMEM;
+	}
+
+	pf->vf[vf_num].vfpr_netdev = vfpr_netdev;
+
+	priv = netdev_priv(vfpr_netdev);
+	priv->vf = &pf->vf[vf_num];
+
+	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
+	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
+
+	netif_carrier_off(vfpr_netdev);
+	netif_tx_disable(vfpr_netdev);
+
+	err = register_netdev(vfpr_netdev);
+	if (err) {
+		dev_err(&pf->pdev->dev, "register_netdev failed for vf: %s\n",
+			vf->vfpr_netdev->name);
+		free_netdev(vfpr_netdev);
+		return err;
+	}
+
+	dev_info(&pf->pdev->dev, "VF Port representor(%s) created for VF %d\n",
+		 vf->vfpr_netdev->name, vf_num);
+
+	/* Delete broadcast filter for VF */
+	i40e_update_vf_broadcast_filter(vf, false);
+
+	return 0;
+}
+
+/**
+ * i40e_free_vfpr_netdev
+ * @vf: pointer to the VF structure
+ *
+ * Free VF Port representor netdev
+ **/
+void i40e_free_vfpr_netdev(struct i40e_vf *vf)
+{
+	struct i40e_pf *pf = vf->pf;
+
+	if (!vf->vfpr_netdev)
+		return;
+
+	dev_info(&pf->pdev->dev, "Freeing VF Port representor(%s)\n",
+		 vf->vfpr_netdev->name);
+
+	unregister_netdev(vf->vfpr_netdev);
+	free_netdev(vf->vfpr_netdev);
+
+	/* Add broadcast filter to VF */
+	i40e_update_vf_broadcast_filter(vf, true);
+}
+
+/**
  * i40e_free_vfs
  * @pf: pointer to the PF structure
  *
@@ -1058,6 +1193,9 @@ void i40e_free_vfs(struct i40e_pf *pf)
 			i40e_free_vf_res(&pf->vf[i]);
 		/* disable qp mappings */
 		i40e_disable_vf_mappings(&pf->vf[i]);
+
+		if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
+			i40e_free_vfpr_netdev(&pf->vf[i]);
 	}
 
 	kfree(pf->vf);
@@ -1125,6 +1263,11 @@ int i40e_alloc_vfs(struct i40e_pf *pf, u16 num_alloc_vfs)
 		/* VF resources get allocated during reset */
 		i40e_reset_vf(&vfs[i], false);
 
+		if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) {
+			ret = i40e_alloc_vfpr_netdev(&vfs[i], i);
+			if (ret)
+				goto err_alloc;
+		}
 	}
 	pf->num_alloc_vfs = num_alloc_vfs;
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 4012d06..25ce93c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -72,10 +72,21 @@ enum i40e_vf_capabilities {
 	I40E_VIRTCHNL_VF_CAP_IWARP,
 };
 
+/* VF Port representator netdev private structure */
+struct i40e_vfpr_netdev_priv {
+	struct i40e_vf *vf;
+};
+
 /* VF information structure */
 struct i40e_vf {
 	struct i40e_pf *pf;
 
+	/* VF Port representator netdev that allows control and configuration
+	 * of VFs from the host. Enables returning VF stats, configuring link
+	 * state, mtu, fdb/vlans etc.
+	 */
+	struct net_device *vfpr_netdev;
+
 	/* VF id in the PF space */
 	s16 vf_id;
 	/* all VF vsis connect to the same parent */
@@ -142,4 +153,7 @@ int i40e_ndo_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool enable);
 void i40e_vc_notify_link_state(struct i40e_pf *pf);
 void i40e_vc_notify_reset(struct i40e_pf *pf);
 
+int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num);
+void i40e_free_vfpr_netdev(struct i40e_vf *vf);
+
 #endif /* _I40E_VIRTCHNL_PF_H_ */
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 3/7] i40e: Sync link state between VFs and VFPRs
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

This patch enables
- reflecting the link state of VFPR based on VF admin state & link state
  of VF based on admin state of VFPR.
- bringing up/down the VFPR sends a notification to update VF link state.
- bringing up/down the VF will cause the link state update of VFPR.
- enable/disable VF link state via ndo_set_vf_link_state will update the
  admin state of associated VFPR.

PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs

# ip link set enp5s2 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* enp5s2 UP -> enp5s0f0-vf0 CARRIER ON */
# ip link show enp5s0f0-vf0
215: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

/* enp5s0f0-vf0 UP -> enp5s2 CARRIER ON */
# ip link show enp5s2
218: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff

/* enp5s2f1 DOWN -> enp5s0f0-vf1 NO-CARRIER */
# ip link show enp5s0f0-vf1
216: enp5s0f0-vf1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

# ip link set enp5s0f0-vf0 down
# ip link set enp5s2f1 up

/* enp5s0-vf0 DOWN -> enp5s2 NO_CARRIER */
# ip link show enp5s2
218: enp5s2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff

# ip -d link show enp5s0f0
213: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid 6805ca27268 state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64
     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
     vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state enable, trust off

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index f9927dc..275113c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1029,6 +1029,13 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
  **/
 static int i40e_vfpr_netdev_open(struct net_device *dev)
 {
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	vf->link_forced = true;
+	vf->link_up = true;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1040,6 +1047,13 @@ static int i40e_vfpr_netdev_open(struct net_device *dev)
  **/
 static int i40e_vfpr_netdev_stop(struct net_device *dev)
 {
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	vf->link_forced = true;
+	vf->link_up = false;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1126,6 +1140,13 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	/* Delete broadcast filter for VF */
 	i40e_update_vf_broadcast_filter(vf, false);
 
+	/* Reset VF link as we are changing the mode to 'switchdev'. VFPR netdev
+	 * needs to be brought up to enable VF link.
+	 */
+	vf->link_forced = true;
+	vf->link_up = false;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1150,6 +1171,10 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 
 	/* Add broadcast filter to VF */
 	i40e_update_vf_broadcast_filter(vf, true);
+
+	/* In legacy mode, VF link is not controlled by VFPR */
+	vf->link_forced = false;
+	i40e_vc_notify_vf_link_state(vf);
 }
 
 /**
@@ -1907,8 +1932,17 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 		goto error_param;
 	}
 
+	if (vf->link_forced && !vf->link_up) {
+		aq_ret = I40E_ERR_PARAM;
+		goto error_param;
+	}
+
 	if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
 		aq_ret = I40E_ERR_TIMEOUT;
+
+	if ((aq_ret == 0) && vf->vfpr_netdev)
+		netif_carrier_on(vf->vfpr_netdev);
+
 error_param:
 	/* send the response to the VF */
 	return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
@@ -1946,8 +1980,16 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 		goto error_param;
 	}
 
+	if (vf->link_forced && vf->link_up) {
+		aq_ret = I40E_ERR_PARAM;
+		goto error_param;
+	}
+
 	i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);
 
+	if ((aq_ret == 0) && vf->vfpr_netdev)
+		netif_carrier_off(vf->vfpr_netdev);
+
 error_param:
 	/* send the response to the VF */
 	return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
@@ -3183,6 +3225,7 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_pf *pf = np->vsi->back;
 	struct i40e_virtchnl_pf_event pfe;
+	struct net_device *vfpr_netdev;
 	struct i40e_hw *hw = &pf->hw;
 	struct i40e_vf *vf;
 	int abs_vf_id;
@@ -3225,6 +3268,17 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
 		ret = -EINVAL;
 		goto error_out;
 	}
+
+	vfpr_netdev = vf->vfpr_netdev;
+	if (vfpr_netdev) {
+		unsigned int flags = vfpr_netdev->flags;
+
+		if (vf->link_up)
+			dev_change_flags(vfpr_netdev, flags | IFF_UP);
+		else
+			dev_change_flags(vfpr_netdev, flags & ~IFF_UP);
+	}
+
 	/* Notify the VF of its new link state */
 	i40e_aq_send_msg_to_vf(hw, abs_vf_id, I40E_VIRTCHNL_OP_EVENT,
 			       0, (u8 *)&pfe, sizeof(pfe), NULL);
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 3/7] i40e: Sync link state between VFs and VFPRs
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

This patch enables
- reflecting the link state of VFPR based on VF admin state & link state
  of VF based on admin state of VFPR.
- bringing up/down the VFPR sends a notification to update VF link state.
- bringing up/down the VF will cause the link state update of VFPR.
- enable/disable VF link state via ndo_set_vf_link_state will update the
  admin state of associated VFPR.

PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs

# ip link set enp5s2 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* enp5s2 UP -> enp5s0f0-vf0 CARRIER ON */
# ip link show enp5s0f0-vf0
215: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

/* enp5s0f0-vf0 UP -> enp5s2 CARRIER ON */
# ip link show enp5s2
218: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff

/* enp5s2f1 DOWN -> enp5s0f0-vf1 NO-CARRIER */
# ip link show enp5s0f0-vf1
216: enp5s0f0-vf1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff

# ip link set enp5s0f0-vf0 down
# ip link set enp5s2f1 up

/* enp5s0-vf0 DOWN -> enp5s2 NO_CARRIER */
# ip link show enp5s2
218: enp5s2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff

# ip -d link show enp5s0f0
213: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid 6805ca27268 state DOWN mode DEFAULT group default qlen 1000
     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64
     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
     vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state enable, trust off

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index f9927dc..275113c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1029,6 +1029,13 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
  **/
 static int i40e_vfpr_netdev_open(struct net_device *dev)
 {
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	vf->link_forced = true;
+	vf->link_up = true;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1040,6 +1047,13 @@ static int i40e_vfpr_netdev_open(struct net_device *dev)
  **/
 static int i40e_vfpr_netdev_stop(struct net_device *dev)
 {
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	vf->link_forced = true;
+	vf->link_up = false;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1126,6 +1140,13 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	/* Delete broadcast filter for VF */
 	i40e_update_vf_broadcast_filter(vf, false);
 
+	/* Reset VF link as we are changing the mode to 'switchdev'. VFPR netdev
+	 * needs to be brought up to enable VF link.
+	 */
+	vf->link_forced = true;
+	vf->link_up = false;
+	i40e_vc_notify_vf_link_state(vf);
+
 	return 0;
 }
 
@@ -1150,6 +1171,10 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 
 	/* Add broadcast filter to VF */
 	i40e_update_vf_broadcast_filter(vf, true);
+
+	/* In legacy mode, VF link is not controlled by VFPR */
+	vf->link_forced = false;
+	i40e_vc_notify_vf_link_state(vf);
 }
 
 /**
@@ -1907,8 +1932,17 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 		goto error_param;
 	}
 
+	if (vf->link_forced && !vf->link_up) {
+		aq_ret = I40E_ERR_PARAM;
+		goto error_param;
+	}
+
 	if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
 		aq_ret = I40E_ERR_TIMEOUT;
+
+	if ((aq_ret == 0) && vf->vfpr_netdev)
+		netif_carrier_on(vf->vfpr_netdev);
+
 error_param:
 	/* send the response to the VF */
 	return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
@@ -1946,8 +1980,16 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 		goto error_param;
 	}
 
+	if (vf->link_forced && vf->link_up) {
+		aq_ret = I40E_ERR_PARAM;
+		goto error_param;
+	}
+
 	i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);
 
+	if ((aq_ret == 0) && vf->vfpr_netdev)
+		netif_carrier_off(vf->vfpr_netdev);
+
 error_param:
 	/* send the response to the VF */
 	return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
@@ -3183,6 +3225,7 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_pf *pf = np->vsi->back;
 	struct i40e_virtchnl_pf_event pfe;
+	struct net_device *vfpr_netdev;
 	struct i40e_hw *hw = &pf->hw;
 	struct i40e_vf *vf;
 	int abs_vf_id;
@@ -3225,6 +3268,17 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
 		ret = -EINVAL;
 		goto error_out;
 	}
+
+	vfpr_netdev = vf->vfpr_netdev;
+	if (vfpr_netdev) {
+		unsigned int flags = vfpr_netdev->flags;
+
+		if (vf->link_up)
+			dev_change_flags(vfpr_netdev, flags | IFF_UP);
+		else
+			dev_change_flags(vfpr_netdev, flags & ~IFF_UP);
+	}
+
 	/* Notify the VF of its new link state */
 	i40e_aq_send_msg_to_vf(hw, abs_vf_id, I40E_VIRTCHNL_OP_EVENT,
 			       0, (u8 *)&pfe, sizeof(pfe), NULL);
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 4/7] net: store port/representator id in metadata_dst
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

Switches and modern SR-IOV enabled NICs may multiplex traffic from Port
representators and control messages over single set of hardware queues.
Control messages and muxed traffic may need ordered delivery.

Those requirements make it hard to comfortably use TC infrastructure today
unless we have a way of attaching metadata to skbs at the upper device.
Because single set of queues is used for many netdevs stopping TC/sched queues
of all of them reliably is impossible and lower device has to retreat to
returning NETDEV_TX_BUSY and usually has to take extra locks on the fastpath.

This patch attempts to enable port/representative devs to attach metadata to
skbs which carry port id.  This way representatives can be queueless and all
queuing can be performed at the lower netdev in the usual way.

Traffic arriving on the port/representative interfaces will be have metadata
attached and will subsequently be queued to the lower device for transmission.
The lower device should recognize the metadata and translate it to HW specific
format which is most likely either a special header inserted before the network
headers or descriptor/metadata fields.

Metadata is associated with the lower device by storing the netdev pointer along
with port id so that if TC decides to redirect or mirror the new netdev will not
try to interpret it.

This is mostly for SR-IOV devices since switches don't have lower netdevs today.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 include/net/dst_metadata.h     | 41 ++++++++++++++++++++++++++++++++---------
 net/core/dst.c                 | 15 ++++++++++-----
 net/core/filter.c              |  1 +
 net/ipv4/ip_tunnel_core.c      |  6 ++++--
 net/openvswitch/flow_netlink.c |  4 +++-
 5 files changed, 50 insertions(+), 17 deletions(-)

diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 701fc81..a803129 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -5,10 +5,22 @@
 #include <net/ip_tunnels.h>
 #include <net/dst.h>
 
+enum metadata_type {
+	METADATA_IP_TUNNEL,
+	METADATA_HW_PORT_MUX,
+};
+
+struct hw_port_info {
+	struct net_device *lower_dev;
+	u32 port_id;
+};
+
 struct metadata_dst {
 	struct dst_entry		dst;
+	enum metadata_type		type;
 	union {
 		struct ip_tunnel_info	tun_info;
+		struct hw_port_info	port_info;
 	} u;
 };
 
@@ -27,7 +39,7 @@ static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb)
 	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 	struct dst_entry *dst;
 
-	if (md_dst)
+	if (md_dst && md_dst->type == METADATA_IP_TUNNEL)
 		return &md_dst->u.tun_info;
 
 	dst = skb_dst(skb);
@@ -55,22 +67,33 @@ static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
 	a = (const struct metadata_dst *) skb_dst(skb_a);
 	b = (const struct metadata_dst *) skb_dst(skb_b);
 
-	if (!a != !b || a->u.tun_info.options_len != b->u.tun_info.options_len)
+	if (!a != !b || a->type != b->type)
 		return 1;
 
-	return memcmp(&a->u.tun_info, &b->u.tun_info,
-		      sizeof(a->u.tun_info) + a->u.tun_info.options_len);
+	switch (a->type) {
+	case METADATA_HW_PORT_MUX:
+		return memcmp(&a->u.port_info, &b->u.port_info,
+			      sizeof(a->u.port_info));
+	case METADATA_IP_TUNNEL:
+		return memcmp(&a->u.tun_info, &b->u.tun_info,
+			      sizeof(a->u.tun_info) +
+					 a->u.tun_info.options_len);
+	default:
+		return 1;
+	}
 }
 
 void metadata_dst_free(struct metadata_dst *);
-struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
-struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
+struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
+					gfp_t flags);
+struct metadata_dst __percpu *
+metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags);
 
 static inline struct metadata_dst *tun_rx_dst(int md_size)
 {
 	struct metadata_dst *tun_dst;
 
-	tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
+	tun_dst = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC);
 	if (!tun_dst)
 		return NULL;
 
@@ -85,11 +108,11 @@ static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb)
 	int md_size;
 	struct metadata_dst *new_md;
 
-	if (!md_dst)
+	if (!md_dst || md_dst->type != METADATA_IP_TUNNEL)
 		return ERR_PTR(-EINVAL);
 
 	md_size = md_dst->u.tun_info.options_len;
-	new_md = metadata_dst_alloc(md_size, GFP_ATOMIC);
+	new_md = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC);
 	if (!new_md)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/net/core/dst.c b/net/core/dst.c
index b5cbbe0..62dd4e4 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -367,7 +367,9 @@ static int dst_md_discard(struct sk_buff *skb)
 	return 0;
 }
 
-static void __metadata_dst_init(struct metadata_dst *md_dst, u8 optslen)
+static void __metadata_dst_init(struct metadata_dst *md_dst,
+				enum metadata_type type, u8 optslen)
+
 {
 	struct dst_entry *dst;
 
@@ -379,9 +381,11 @@ static void __metadata_dst_init(struct metadata_dst *md_dst, u8 optslen)
 	dst->output = dst_md_discard_out;
 
 	memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst));
+	md_dst->type = type;
 }
 
-struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
+struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
+					gfp_t flags)
 {
 	struct metadata_dst *md_dst;
 
@@ -389,7 +393,7 @@ struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
 	if (!md_dst)
 		return NULL;
 
-	__metadata_dst_init(md_dst, optslen);
+	__metadata_dst_init(md_dst, type, optslen);
 
 	return md_dst;
 }
@@ -403,7 +407,8 @@ void metadata_dst_free(struct metadata_dst *md_dst)
 	kfree(md_dst);
 }
 
-struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags)
+struct metadata_dst __percpu *
+metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags)
 {
 	int cpu;
 	struct metadata_dst __percpu *md_dst;
@@ -414,7 +419,7 @@ struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags)
 		return NULL;
 
 	for_each_possible_cpu(cpu)
-		__metadata_dst_init(per_cpu_ptr(md_dst, cpu), optslen);
+		__metadata_dst_init(per_cpu_ptr(md_dst, cpu), type, optslen);
 
 	return md_dst;
 }
diff --git a/net/core/filter.c b/net/core/filter.c
index 1969b3f..617ca0c 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2521,6 +2521,7 @@ bpf_get_skb_set_tunnel_proto(enum bpf_func_id which)
 		 * that is holding verifier mutex.
 		 */
 		md_dst = metadata_dst_alloc_percpu(IP_TUNNEL_OPTS_MAX,
+						   METADATA_IP_TUNNEL,
 						   GFP_KERNEL);
 		if (!md_dst)
 			return NULL;
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index fed3d29..6b2dccd 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -134,10 +134,12 @@ struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
 	struct metadata_dst *res;
 	struct ip_tunnel_info *dst, *src;
 
-	if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
+	if (!md || md->type != METADATA_IP_TUNNEL ||
+	    md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
+
 		return NULL;
 
-	res = metadata_dst_alloc(0, flags);
+	res = metadata_dst_alloc(0, METADATA_IP_TUNNEL, flags);
 	if (!res)
 		return NULL;
 
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index c87d359..164b4f1 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -2105,7 +2105,9 @@ static int validate_and_copy_set_tun(const struct nlattr *attr,
 	if (start < 0)
 		return start;
 
-	tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
+	tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
+				     GFP_KERNEL);
+
 	if (!tun_dst)
 		return -ENOMEM;
 
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 4/7] net: store port/representator id in metadata_dst
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

Switches and modern SR-IOV enabled NICs may multiplex traffic from Port
representators and control messages over single set of hardware queues.
Control messages and muxed traffic may need ordered delivery.

Those requirements make it hard to comfortably use TC infrastructure today
unless we have a way of attaching metadata to skbs at the upper device.
Because single set of queues is used for many netdevs stopping TC/sched queues
of all of them reliably is impossible and lower device has to retreat to
returning NETDEV_TX_BUSY and usually has to take extra locks on the fastpath.

This patch attempts to enable port/representative devs to attach metadata to
skbs which carry port id.  This way representatives can be queueless and all
queuing can be performed at the lower netdev in the usual way.

Traffic arriving on the port/representative interfaces will be have metadata
attached and will subsequently be queued to the lower device for transmission.
The lower device should recognize the metadata and translate it to HW specific
format which is most likely either a special header inserted before the network
headers or descriptor/metadata fields.

Metadata is associated with the lower device by storing the netdev pointer along
with port id so that if TC decides to redirect or mirror the new netdev will not
try to interpret it.

This is mostly for SR-IOV devices since switches don't have lower netdevs today.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 include/net/dst_metadata.h     | 41 ++++++++++++++++++++++++++++++++---------
 net/core/dst.c                 | 15 ++++++++++-----
 net/core/filter.c              |  1 +
 net/ipv4/ip_tunnel_core.c      |  6 ++++--
 net/openvswitch/flow_netlink.c |  4 +++-
 5 files changed, 50 insertions(+), 17 deletions(-)

diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 701fc81..a803129 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -5,10 +5,22 @@
 #include <net/ip_tunnels.h>
 #include <net/dst.h>
 
+enum metadata_type {
+	METADATA_IP_TUNNEL,
+	METADATA_HW_PORT_MUX,
+};
+
+struct hw_port_info {
+	struct net_device *lower_dev;
+	u32 port_id;
+};
+
 struct metadata_dst {
 	struct dst_entry		dst;
+	enum metadata_type		type;
 	union {
 		struct ip_tunnel_info	tun_info;
+		struct hw_port_info	port_info;
 	} u;
 };
 
@@ -27,7 +39,7 @@ static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb)
 	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 	struct dst_entry *dst;
 
-	if (md_dst)
+	if (md_dst && md_dst->type == METADATA_IP_TUNNEL)
 		return &md_dst->u.tun_info;
 
 	dst = skb_dst(skb);
@@ -55,22 +67,33 @@ static inline int skb_metadata_dst_cmp(const struct sk_buff *skb_a,
 	a = (const struct metadata_dst *) skb_dst(skb_a);
 	b = (const struct metadata_dst *) skb_dst(skb_b);
 
-	if (!a != !b || a->u.tun_info.options_len != b->u.tun_info.options_len)
+	if (!a != !b || a->type != b->type)
 		return 1;
 
-	return memcmp(&a->u.tun_info, &b->u.tun_info,
-		      sizeof(a->u.tun_info) + a->u.tun_info.options_len);
+	switch (a->type) {
+	case METADATA_HW_PORT_MUX:
+		return memcmp(&a->u.port_info, &b->u.port_info,
+			      sizeof(a->u.port_info));
+	case METADATA_IP_TUNNEL:
+		return memcmp(&a->u.tun_info, &b->u.tun_info,
+			      sizeof(a->u.tun_info) +
+					 a->u.tun_info.options_len);
+	default:
+		return 1;
+	}
 }
 
 void metadata_dst_free(struct metadata_dst *);
-struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
-struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
+struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
+					gfp_t flags);
+struct metadata_dst __percpu *
+metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags);
 
 static inline struct metadata_dst *tun_rx_dst(int md_size)
 {
 	struct metadata_dst *tun_dst;
 
-	tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
+	tun_dst = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC);
 	if (!tun_dst)
 		return NULL;
 
@@ -85,11 +108,11 @@ static inline struct metadata_dst *tun_dst_unclone(struct sk_buff *skb)
 	int md_size;
 	struct metadata_dst *new_md;
 
-	if (!md_dst)
+	if (!md_dst || md_dst->type != METADATA_IP_TUNNEL)
 		return ERR_PTR(-EINVAL);
 
 	md_size = md_dst->u.tun_info.options_len;
-	new_md = metadata_dst_alloc(md_size, GFP_ATOMIC);
+	new_md = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC);
 	if (!new_md)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/net/core/dst.c b/net/core/dst.c
index b5cbbe0..62dd4e4 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -367,7 +367,9 @@ static int dst_md_discard(struct sk_buff *skb)
 	return 0;
 }
 
-static void __metadata_dst_init(struct metadata_dst *md_dst, u8 optslen)
+static void __metadata_dst_init(struct metadata_dst *md_dst,
+				enum metadata_type type, u8 optslen)
+
 {
 	struct dst_entry *dst;
 
@@ -379,9 +381,11 @@ static void __metadata_dst_init(struct metadata_dst *md_dst, u8 optslen)
 	dst->output = dst_md_discard_out;
 
 	memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst));
+	md_dst->type = type;
 }
 
-struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
+struct metadata_dst *metadata_dst_alloc(u8 optslen, enum metadata_type type,
+					gfp_t flags)
 {
 	struct metadata_dst *md_dst;
 
@@ -389,7 +393,7 @@ struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
 	if (!md_dst)
 		return NULL;
 
-	__metadata_dst_init(md_dst, optslen);
+	__metadata_dst_init(md_dst, type, optslen);
 
 	return md_dst;
 }
@@ -403,7 +407,8 @@ void metadata_dst_free(struct metadata_dst *md_dst)
 	kfree(md_dst);
 }
 
-struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags)
+struct metadata_dst __percpu *
+metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags)
 {
 	int cpu;
 	struct metadata_dst __percpu *md_dst;
@@ -414,7 +419,7 @@ struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags)
 		return NULL;
 
 	for_each_possible_cpu(cpu)
-		__metadata_dst_init(per_cpu_ptr(md_dst, cpu), optslen);
+		__metadata_dst_init(per_cpu_ptr(md_dst, cpu), type, optslen);
 
 	return md_dst;
 }
diff --git a/net/core/filter.c b/net/core/filter.c
index 1969b3f..617ca0c 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2521,6 +2521,7 @@ bpf_get_skb_set_tunnel_proto(enum bpf_func_id which)
 		 * that is holding verifier mutex.
 		 */
 		md_dst = metadata_dst_alloc_percpu(IP_TUNNEL_OPTS_MAX,
+						   METADATA_IP_TUNNEL,
 						   GFP_KERNEL);
 		if (!md_dst)
 			return NULL;
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index fed3d29..6b2dccd 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -134,10 +134,12 @@ struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
 	struct metadata_dst *res;
 	struct ip_tunnel_info *dst, *src;
 
-	if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
+	if (!md || md->type != METADATA_IP_TUNNEL ||
+	    md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
+
 		return NULL;
 
-	res = metadata_dst_alloc(0, flags);
+	res = metadata_dst_alloc(0, METADATA_IP_TUNNEL, flags);
 	if (!res)
 		return NULL;
 
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index c87d359..164b4f1 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -2105,7 +2105,9 @@ static int validate_and_copy_set_tun(const struct nlattr *attr,
 	if (start < 0)
 		return start;
 
-	tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
+	tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
+				     GFP_KERNEL);
+
 	if (!tun_dst)
 		return -ENOMEM;
 
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 5/7] i40e: Add TX and RX support in switchdev mode.
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

In switchdev mode, broadcast filter is not enabled on VFs. The broadcasts
and unknown frames from VFs are received by the PF and passed to
corresponding VF port representator netdev.
A host based switching entity like a linux bridge or OVS redirects these
frames to the right VFs via VFPR netdevs. Any frames sent via VFPR netdevs
are sent as directed transmits to the corresponding VFs. To enable directed
transmit, skb metadata dst is used to pass the VF id and the frame is
requeued to call the PFs transmit routine.

Small script to demonstrate inter VF pings in switchdev mode.
PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1

# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip link set enp5s0f0 vf 0 mac 00:11:22:33:44:55
# ip link set enp5s0f0 vf 1 mac 00:11:22:33:44:56
# rmmod i40evf; modprobe i40evf

/* Create 2 namespaces and move the VFs to the corresponding ns. */
# ip netns add ns0
# ip link set enp5s2 netns ns0
# ip netns exec ns0 ip addr add 192.168.1.10/24 dev enp5s2
# ip netns exec ns0 ip link set enp5s2 up
# ip netns add ns1
# ip link set enp5s2f1 netns ns1
# ip netns exec ns1 ip addr add 192.168.1.11/24 dev enp5s2f1
# ip netns exec ns1 ip link set enp5s2f1 up

/* bring up pf and vfpr netdevs */
# ip link set enp5s0f0 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* Create a linux bridge and add vfpr netdevs to it. */
# ip link add vfpr-br type bridge
# ip link set enp5s0f0-vf0 master vfpr-br
# ip link set enp5s0f0-vf1 master vfpr-br
# ip addr add 192.168.1.1/24 dev vfpr-br
# ip link set vfpr-br up

# ip netns exec ns0 ping -c3 192.168.1.11
# ip netns exec ns1 ping -c3 192.168.1.10

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h             |   1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        |   4 +
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        | 106 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.h        |   2 +
 drivers/net/ethernet/intel/i40e/i40e_type.h        |   3 +
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |  17 +++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |   1 +
 7 files changed, 127 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index b58c56c..d038bc1 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -55,6 +55,7 @@
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
 #include <net/devlink.h>
+#include <net/dst_metadata.h>
 
 #include "i40e_type.h"
 #include "i40e_prototype.h"
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 06b85ec..ac324e2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11328,6 +11328,7 @@ static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 {
 	struct i40e_pf *pf = devlink_priv(devlink);
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
 	struct i40e_vf *vf;
 	int i, j, err = 0;
 
@@ -11341,6 +11342,8 @@ static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 			i40e_free_vfpr_netdev(vf);
 		}
 		pf->eswitch_mode = mode;
+		vsi->netdev->priv_flags |=
+			(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
 		break;
 	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
 		for (i = 0; i < pf->num_alloc_vfs; i++) {
@@ -11355,6 +11358,7 @@ static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 			}
 		}
 		pf->eswitch_mode = mode;
+		netif_keep_dst(vsi->netdev);
 		break;
 	default:
 		err = -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 0291ed4..f43d1df 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1283,16 +1283,39 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring,
  * @rx_ring:  rx ring in play
  * @skb: packet to send up
  * @vlan_tag: vlan tag for packet
+ * @lpbk: is it a loopback frame?
  **/
 static void i40e_receive_skb(struct i40e_ring *rx_ring,
-			     struct sk_buff *skb, u16 vlan_tag)
+			     struct sk_buff *skb, u16 vlan_tag, bool lpbk)
 {
 	struct i40e_q_vector *q_vector = rx_ring->q_vector;
+	struct i40e_pf *pf = rx_ring->vsi->back;
+	struct i40e_vf *vf;
+	struct ethhdr *eth;
+	int vf_id;
 
 	if ((rx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
 	    (vlan_tag & VLAN_VID_MASK))
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
 
+	if ((pf->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY) || !lpbk)
+		goto gro_receive;
+
+	/* If a loopback packet is received from a VF in switchdev mode, pass
+	 * the frame to the corresponding VFPR netdev based on the source MAC
+	 * in the frame.
+	 */
+	eth = (struct ethhdr *)skb_mac_header(skb);
+	for (vf_id = 0; vf_id < pf->num_alloc_vfs; vf_id++) {
+		vf = &pf->vf[vf_id];
+		if (ether_addr_equal(eth->h_source,
+				     vf->default_lan_addr.addr)) {
+			skb->dev = vf->vfpr_netdev;
+			break;
+		}
+	}
+
+gro_receive:
 	napi_gro_receive(&q_vector->napi, skb);
 }
 
@@ -1501,6 +1524,7 @@ static inline void i40e_rx_hash(struct i40e_ring *ring,
  * @rx_desc: pointer to the EOP Rx descriptor
  * @skb: pointer to current skb being populated
  * @rx_ptype: the packet type decoded by hardware
+ * @lpbk: is it a loopback frame?
  *
  * This function checks the ring, descriptor, and packet information in
  * order to populate the hash, checksum, VLAN, protocol, and
@@ -1509,7 +1533,7 @@ static inline void i40e_rx_hash(struct i40e_ring *ring,
 static inline
 void i40e_process_skb_fields(struct i40e_ring *rx_ring,
 			     union i40e_rx_desc *rx_desc, struct sk_buff *skb,
-			     u8 rx_ptype)
+			     u8 rx_ptype, bool *lpbk)
 {
 	u64 qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len);
 	u32 rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >>
@@ -1518,6 +1542,9 @@ void i40e_process_skb_fields(struct i40e_ring *rx_ring,
 	u32 tsyn = (rx_status & I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >>
 		   I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT;
 
+	*lpbk = !!((rx_status & I40E_RXD_QW1_STATUS_LPBK_MASK) >>
+		I40E_RXD_QW1_STATUS_LPBK_SHIFT);
+
 	if (unlikely(tsynvalid))
 		i40e_ptp_rx_hwtstamp(rx_ring->vsi->back, skb, tsyn);
 
@@ -2045,6 +2072,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 		u8 rx_ptype;
 		u64 qword;
 		unsigned int xdp_consumed_bytes = 0;
+		bool lpbk;
 
 		/* return some buffers to hardware, one at a time is too slow */
 		if (cleaned_count >= I40E_RX_BUFFER_WRITE) {
@@ -2113,7 +2141,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 			   I40E_RXD_QW1_PTYPE_SHIFT;
 
 		/* populate checksum, VLAN, and protocol */
-		i40e_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype);
+		i40e_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype, &lpbk);
 
 #ifdef I40E_FCOE
 		if (unlikely(
@@ -2127,7 +2155,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 		vlan_tag = (qword & BIT(I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)) ?
 			   le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1) : 0;
 
-		i40e_receive_skb(rx_ring, skb, vlan_tag);
+		i40e_receive_skb(rx_ring, skb, vlan_tag, lpbk);
 		skb = NULL;
 
 		/* update budget accounting */
@@ -2692,6 +2720,27 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len,
 }
 
 /**
+ * i40e_tvsi - set up the target vsi in TX context descriptor
+ * @tx_ring:  ptr to the target vsi
+ * @cd_type_cmd_tso_mss: Quad Word 1
+ *
+ * Returns 0
+ **/
+static int i40e_tvsi(struct i40e_vsi *tvsi, u64 *cd_type_cmd_tso_mss)
+{
+	u64 cd_cmd, cd_tvsi;
+
+	cd_cmd = I40E_TX_CTX_DESC_SWTCH_VSI;
+	cd_tvsi = tvsi->id;
+	cd_tvsi = (cd_tvsi << I40E_TXD_CTX_QW1_VSI_SHIFT) &
+		  I40E_TXD_CTX_QW1_VSI_MASK;
+	*cd_type_cmd_tso_mss |= (cd_cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) |
+				 cd_tvsi;
+
+	return 0;
+}
+
+/**
  * i40e_tsyn - set up the tsyn context descriptor
  * @tx_ring:  ptr to the ring to send
  * @skb:      ptr to the skb we're sending
@@ -3223,8 +3272,12 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 					struct i40e_ring *tx_ring)
 {
 	u64 cd_type_cmd_tso_mss = I40E_TX_DESC_DTYPE_CONTEXT;
+	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 	u32 cd_tunneling = 0, cd_l2tag2 = 0;
 	struct i40e_tx_buffer *first;
+	struct i40e_vsi *t_vsi = NULL;
+	struct i40e_vf *t_vf;
+	struct i40e_pf *pf;
 	u32 td_offset = 0;
 	u32 tx_flags = 0;
 	__be16 protocol;
@@ -3276,7 +3329,26 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 	else if (protocol == htons(ETH_P_IPV6))
 		tx_flags |= I40E_TX_FLAGS_IPV6;
 
-	tso = i40e_tso(first, &hdr_len, &cd_type_cmd_tso_mss);
+	/* If skb metadata dst points to a VF id, do a directed transmit to
+	 * that VSI. TSO is mutually exclusive with this option. So TSO is not
+	 * enabled when doing a directed transmit.
+	 */
+	if (md_dst && (md_dst->type == METADATA_HW_PORT_MUX)) {
+		pf = tx_ring->vsi->back;
+		if (md_dst->u.port_info.port_id >= pf->num_alloc_vfs) {
+			WARN_ONCE(1, "Unexpected port_id: %d num_vfs:%d\n",
+				  md_dst->u.port_info.port_id,
+				  pf->num_alloc_vfs);
+			goto out_drop;
+		}
+		t_vf = &pf->vf[md_dst->u.port_info.port_id];
+		t_vsi = pf->vsi[t_vf->lan_vsi_idx];
+	}
+
+	if (t_vsi)
+		tso = i40e_tvsi(t_vsi, &cd_type_cmd_tso_mss);
+	else
+		tso = i40e_tso(first, &hdr_len, &cd_type_cmd_tso_mss);
 
 	if (tso < 0)
 		goto out_drop;
@@ -3340,3 +3412,27 @@ netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 
 	return i40e_xmit_frame_ring(skb, tx_ring);
 }
+
+/**
+ * i40e_vfpr_netdev_start_xmit
+ * @skb:    send buffer
+ * @netdev: network interface device structure
+ *
+ * Sets skb->dev to PF netdev, VF id in the skb->dst and requeues
+ * skb via dev_queue_xmit()
+ **/
+netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
+					struct net_device *netdev)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(netdev);
+	struct i40e_vf *vf = priv->vf;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+
+	skb_dst_drop(skb);
+	dst_hold(&priv->vfpr_dst->dst);
+	skb_dst_set(skb, &priv->vfpr_dst->dst);
+	skb->dev = vsi->netdev;
+
+	return dev_queue_xmit(skb);
+}
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index 3250be7..5e24aef 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -393,6 +393,8 @@ struct i40e_ring_container {
 
 bool i40e_alloc_rx_buffers(struct i40e_ring *rxr, u16 cleaned_count);
 netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
+netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
+					struct net_device *netdev);
 void i40e_clean_tx_ring(struct i40e_ring *tx_ring);
 void i40e_clean_rx_ring(struct i40e_ring *rx_ring);
 int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring);
diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
index 939f9fd..251f57e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
@@ -729,6 +729,9 @@ enum i40e_rx_desc_status_bits {
 #define I40E_RXD_QW1_STATUS_TSYNVALID_SHIFT  I40E_RX_DESC_STATUS_TSYNVALID_SHIFT
 #define I40E_RXD_QW1_STATUS_TSYNVALID_MASK \
 				    BIT_ULL(I40E_RXD_QW1_STATUS_TSYNVALID_SHIFT)
+#define I40E_RXD_QW1_STATUS_LPBK_SHIFT  I40E_RX_DESC_STATUS_LPBK_SHIFT
+#define I40E_RXD_QW1_STATUS_LPBK_MASK \
+				BIT_ULL(I40E_RXD_QW1_STATUS_LPBK_SHIFT)
 
 enum i40e_rx_desc_fltstat_values {
 	I40E_RX_DESC_FLTSTAT_NO_DATA	= 0,
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 275113c..7211fba 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1060,6 +1060,7 @@ static int i40e_vfpr_netdev_stop(struct net_device *dev)
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
+	.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
 };
 
 /**
@@ -1119,6 +1120,10 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 
 	priv = netdev_priv(vfpr_netdev);
 	priv->vf = &pf->vf[vf_num];
+	priv->vfpr_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
+					    GFP_KERNEL);
+	priv->vfpr_dst->u.port_info.lower_dev = vsi->netdev;
+	priv->vfpr_dst->u.port_info.port_id = vf->vf_id;
 
 	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
 	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
@@ -1130,6 +1135,7 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	if (err) {
 		dev_err(&pf->pdev->dev, "register_netdev failed for vf: %s\n",
 			vf->vfpr_netdev->name);
+		dst_release((struct dst_entry *)priv->vfpr_dst);
 		free_netdev(vfpr_netdev);
 		return err;
 	}
@@ -1158,6 +1164,7 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
  **/
 void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 {
+	struct i40e_vfpr_netdev_priv *priv;
 	struct i40e_pf *pf = vf->pf;
 
 	if (!vf->vfpr_netdev)
@@ -1166,6 +1173,8 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 	dev_info(&pf->pdev->dev, "Freeing VF Port representor(%s)\n",
 		 vf->vfpr_netdev->name);
 
+	priv = netdev_priv(vf->vfpr_netdev);
+	dst_release((struct dst_entry *)priv->vfpr_dst);
 	unregister_netdev(vf->vfpr_netdev);
 	free_netdev(vf->vfpr_netdev);
 
@@ -1940,8 +1949,10 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 	if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
 		aq_ret = I40E_ERR_TIMEOUT;
 
-	if ((aq_ret == 0) && vf->vfpr_netdev)
+	if ((aq_ret == 0) && vf->vfpr_netdev) {
+		netif_tx_start_all_queues(vf->vfpr_netdev);
 		netif_carrier_on(vf->vfpr_netdev);
+	}
 
 error_param:
 	/* send the response to the VF */
@@ -1987,8 +1998,10 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 
 	i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);
 
-	if ((aq_ret == 0) && vf->vfpr_netdev)
+	if ((aq_ret == 0) && vf->vfpr_netdev) {
+		netif_tx_stop_all_queues(vf->vfpr_netdev);
 		netif_carrier_off(vf->vfpr_netdev);
+	}
 
 error_param:
 	/* send the response to the VF */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 25ce93c..3dea207 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -74,6 +74,7 @@ enum i40e_vf_capabilities {
 
 /* VF Port representator netdev private structure */
 struct i40e_vfpr_netdev_priv {
+	struct metadata_dst *vfpr_dst;
 	struct i40e_vf *vf;
 };
 
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 5/7] i40e: Add TX and RX support in switchdev mode.
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

In switchdev mode, broadcast filter is not enabled on VFs. The broadcasts
and unknown frames from VFs are received by the PF and passed to
corresponding VF port representator netdev.
A host based switching entity like a linux bridge or OVS redirects these
frames to the right VFs via VFPR netdevs. Any frames sent via VFPR netdevs
are sent as directed transmits to the corresponding VFs. To enable directed
transmit, skb metadata dst is used to pass the VF id and the frame is
requeued to call the PFs transmit routine.

Small script to demonstrate inter VF pings in switchdev mode.
PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1

# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip link set enp5s0f0 vf 0 mac 00:11:22:33:44:55
# ip link set enp5s0f0 vf 1 mac 00:11:22:33:44:56
# rmmod i40evf; modprobe i40evf

/* Create 2 namespaces and move the VFs to the corresponding ns. */
# ip netns add ns0
# ip link set enp5s2 netns ns0
# ip netns exec ns0 ip addr add 192.168.1.10/24 dev enp5s2
# ip netns exec ns0 ip link set enp5s2 up
# ip netns add ns1
# ip link set enp5s2f1 netns ns1
# ip netns exec ns1 ip addr add 192.168.1.11/24 dev enp5s2f1
# ip netns exec ns1 ip link set enp5s2f1 up

/* bring up pf and vfpr netdevs */
# ip link set enp5s0f0 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* Create a linux bridge and add vfpr netdevs to it. */
# ip link add vfpr-br type bridge
# ip link set enp5s0f0-vf0 master vfpr-br
# ip link set enp5s0f0-vf1 master vfpr-br
# ip addr add 192.168.1.1/24 dev vfpr-br
# ip link set vfpr-br up

# ip netns exec ns0 ping -c3 192.168.1.11
# ip netns exec ns1 ping -c3 192.168.1.10

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h             |   1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        |   4 +
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        | 106 ++++++++++++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_txrx.h        |   2 +
 drivers/net/ethernet/intel/i40e/i40e_type.h        |   3 +
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |  17 +++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |   1 +
 7 files changed, 127 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index b58c56c..d038bc1 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -55,6 +55,7 @@
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
 #include <net/devlink.h>
+#include <net/dst_metadata.h>
 
 #include "i40e_type.h"
 #include "i40e_prototype.h"
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 06b85ec..ac324e2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11328,6 +11328,7 @@ static int i40e_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 {
 	struct i40e_pf *pf = devlink_priv(devlink);
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
 	struct i40e_vf *vf;
 	int i, j, err = 0;
 
@@ -11341,6 +11342,8 @@ static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 			i40e_free_vfpr_netdev(vf);
 		}
 		pf->eswitch_mode = mode;
+		vsi->netdev->priv_flags |=
+			(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
 		break;
 	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
 		for (i = 0; i < pf->num_alloc_vfs; i++) {
@@ -11355,6 +11358,7 @@ static int i40e_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode)
 			}
 		}
 		pf->eswitch_mode = mode;
+		netif_keep_dst(vsi->netdev);
 		break;
 	default:
 		err = -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 0291ed4..f43d1df 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1283,16 +1283,39 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring,
  * @rx_ring:  rx ring in play
  * @skb: packet to send up
  * @vlan_tag: vlan tag for packet
+ * @lpbk: is it a loopback frame?
  **/
 static void i40e_receive_skb(struct i40e_ring *rx_ring,
-			     struct sk_buff *skb, u16 vlan_tag)
+			     struct sk_buff *skb, u16 vlan_tag, bool lpbk)
 {
 	struct i40e_q_vector *q_vector = rx_ring->q_vector;
+	struct i40e_pf *pf = rx_ring->vsi->back;
+	struct i40e_vf *vf;
+	struct ethhdr *eth;
+	int vf_id;
 
 	if ((rx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
 	    (vlan_tag & VLAN_VID_MASK))
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
 
+	if ((pf->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY) || !lpbk)
+		goto gro_receive;
+
+	/* If a loopback packet is received from a VF in switchdev mode, pass
+	 * the frame to the corresponding VFPR netdev based on the source MAC
+	 * in the frame.
+	 */
+	eth = (struct ethhdr *)skb_mac_header(skb);
+	for (vf_id = 0; vf_id < pf->num_alloc_vfs; vf_id++) {
+		vf = &pf->vf[vf_id];
+		if (ether_addr_equal(eth->h_source,
+				     vf->default_lan_addr.addr)) {
+			skb->dev = vf->vfpr_netdev;
+			break;
+		}
+	}
+
+gro_receive:
 	napi_gro_receive(&q_vector->napi, skb);
 }
 
@@ -1501,6 +1524,7 @@ static inline void i40e_rx_hash(struct i40e_ring *ring,
  * @rx_desc: pointer to the EOP Rx descriptor
  * @skb: pointer to current skb being populated
  * @rx_ptype: the packet type decoded by hardware
+ * @lpbk: is it a loopback frame?
  *
  * This function checks the ring, descriptor, and packet information in
  * order to populate the hash, checksum, VLAN, protocol, and
@@ -1509,7 +1533,7 @@ static inline void i40e_rx_hash(struct i40e_ring *ring,
 static inline
 void i40e_process_skb_fields(struct i40e_ring *rx_ring,
 			     union i40e_rx_desc *rx_desc, struct sk_buff *skb,
-			     u8 rx_ptype)
+			     u8 rx_ptype, bool *lpbk)
 {
 	u64 qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len);
 	u32 rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >>
@@ -1518,6 +1542,9 @@ void i40e_process_skb_fields(struct i40e_ring *rx_ring,
 	u32 tsyn = (rx_status & I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >>
 		   I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT;
 
+	*lpbk = !!((rx_status & I40E_RXD_QW1_STATUS_LPBK_MASK) >>
+		I40E_RXD_QW1_STATUS_LPBK_SHIFT);
+
 	if (unlikely(tsynvalid))
 		i40e_ptp_rx_hwtstamp(rx_ring->vsi->back, skb, tsyn);
 
@@ -2045,6 +2072,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 		u8 rx_ptype;
 		u64 qword;
 		unsigned int xdp_consumed_bytes = 0;
+		bool lpbk;
 
 		/* return some buffers to hardware, one at a time is too slow */
 		if (cleaned_count >= I40E_RX_BUFFER_WRITE) {
@@ -2113,7 +2141,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 			   I40E_RXD_QW1_PTYPE_SHIFT;
 
 		/* populate checksum, VLAN, and protocol */
-		i40e_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype);
+		i40e_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype, &lpbk);
 
 #ifdef I40E_FCOE
 		if (unlikely(
@@ -2127,7 +2155,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 		vlan_tag = (qword & BIT(I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)) ?
 			   le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1) : 0;
 
-		i40e_receive_skb(rx_ring, skb, vlan_tag);
+		i40e_receive_skb(rx_ring, skb, vlan_tag, lpbk);
 		skb = NULL;
 
 		/* update budget accounting */
@@ -2692,6 +2720,27 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len,
 }
 
 /**
+ * i40e_tvsi - set up the target vsi in TX context descriptor
+ * @tx_ring:  ptr to the target vsi
+ * @cd_type_cmd_tso_mss: Quad Word 1
+ *
+ * Returns 0
+ **/
+static int i40e_tvsi(struct i40e_vsi *tvsi, u64 *cd_type_cmd_tso_mss)
+{
+	u64 cd_cmd, cd_tvsi;
+
+	cd_cmd = I40E_TX_CTX_DESC_SWTCH_VSI;
+	cd_tvsi = tvsi->id;
+	cd_tvsi = (cd_tvsi << I40E_TXD_CTX_QW1_VSI_SHIFT) &
+		  I40E_TXD_CTX_QW1_VSI_MASK;
+	*cd_type_cmd_tso_mss |= (cd_cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) |
+				 cd_tvsi;
+
+	return 0;
+}
+
+/**
  * i40e_tsyn - set up the tsyn context descriptor
  * @tx_ring:  ptr to the ring to send
  * @skb:      ptr to the skb we're sending
@@ -3223,8 +3272,12 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 					struct i40e_ring *tx_ring)
 {
 	u64 cd_type_cmd_tso_mss = I40E_TX_DESC_DTYPE_CONTEXT;
+	struct metadata_dst *md_dst = skb_metadata_dst(skb);
 	u32 cd_tunneling = 0, cd_l2tag2 = 0;
 	struct i40e_tx_buffer *first;
+	struct i40e_vsi *t_vsi = NULL;
+	struct i40e_vf *t_vf;
+	struct i40e_pf *pf;
 	u32 td_offset = 0;
 	u32 tx_flags = 0;
 	__be16 protocol;
@@ -3276,7 +3329,26 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 	else if (protocol == htons(ETH_P_IPV6))
 		tx_flags |= I40E_TX_FLAGS_IPV6;
 
-	tso = i40e_tso(first, &hdr_len, &cd_type_cmd_tso_mss);
+	/* If skb metadata dst points to a VF id, do a directed transmit to
+	 * that VSI. TSO is mutually exclusive with this option. So TSO is not
+	 * enabled when doing a directed transmit.
+	 */
+	if (md_dst && (md_dst->type == METADATA_HW_PORT_MUX)) {
+		pf = tx_ring->vsi->back;
+		if (md_dst->u.port_info.port_id >= pf->num_alloc_vfs) {
+			WARN_ONCE(1, "Unexpected port_id: %d num_vfs:%d\n",
+				  md_dst->u.port_info.port_id,
+				  pf->num_alloc_vfs);
+			goto out_drop;
+		}
+		t_vf = &pf->vf[md_dst->u.port_info.port_id];
+		t_vsi = pf->vsi[t_vf->lan_vsi_idx];
+	}
+
+	if (t_vsi)
+		tso = i40e_tvsi(t_vsi, &cd_type_cmd_tso_mss);
+	else
+		tso = i40e_tso(first, &hdr_len, &cd_type_cmd_tso_mss);
 
 	if (tso < 0)
 		goto out_drop;
@@ -3340,3 +3412,27 @@ netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 
 	return i40e_xmit_frame_ring(skb, tx_ring);
 }
+
+/**
+ * i40e_vfpr_netdev_start_xmit
+ * @skb:    send buffer
+ * @netdev: network interface device structure
+ *
+ * Sets skb->dev to PF netdev, VF id in the skb->dst and requeues
+ * skb via dev_queue_xmit()
+ **/
+netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
+					struct net_device *netdev)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(netdev);
+	struct i40e_vf *vf = priv->vf;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+
+	skb_dst_drop(skb);
+	dst_hold(&priv->vfpr_dst->dst);
+	skb_dst_set(skb, &priv->vfpr_dst->dst);
+	skb->dev = vsi->netdev;
+
+	return dev_queue_xmit(skb);
+}
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index 3250be7..5e24aef 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -393,6 +393,8 @@ struct i40e_ring_container {
 
 bool i40e_alloc_rx_buffers(struct i40e_ring *rxr, u16 cleaned_count);
 netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
+netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
+					struct net_device *netdev);
 void i40e_clean_tx_ring(struct i40e_ring *tx_ring);
 void i40e_clean_rx_ring(struct i40e_ring *rx_ring);
 int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring);
diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
index 939f9fd..251f57e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
@@ -729,6 +729,9 @@ enum i40e_rx_desc_status_bits {
 #define I40E_RXD_QW1_STATUS_TSYNVALID_SHIFT  I40E_RX_DESC_STATUS_TSYNVALID_SHIFT
 #define I40E_RXD_QW1_STATUS_TSYNVALID_MASK \
 				    BIT_ULL(I40E_RXD_QW1_STATUS_TSYNVALID_SHIFT)
+#define I40E_RXD_QW1_STATUS_LPBK_SHIFT  I40E_RX_DESC_STATUS_LPBK_SHIFT
+#define I40E_RXD_QW1_STATUS_LPBK_MASK \
+				BIT_ULL(I40E_RXD_QW1_STATUS_LPBK_SHIFT)
 
 enum i40e_rx_desc_fltstat_values {
 	I40E_RX_DESC_FLTSTAT_NO_DATA	= 0,
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 275113c..7211fba 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1060,6 +1060,7 @@ static int i40e_vfpr_netdev_stop(struct net_device *dev)
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
+	.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
 };
 
 /**
@@ -1119,6 +1120,10 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 
 	priv = netdev_priv(vfpr_netdev);
 	priv->vf = &pf->vf[vf_num];
+	priv->vfpr_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
+					    GFP_KERNEL);
+	priv->vfpr_dst->u.port_info.lower_dev = vsi->netdev;
+	priv->vfpr_dst->u.port_info.port_id = vf->vf_id;
 
 	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
 	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
@@ -1130,6 +1135,7 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	if (err) {
 		dev_err(&pf->pdev->dev, "register_netdev failed for vf: %s\n",
 			vf->vfpr_netdev->name);
+		dst_release((struct dst_entry *)priv->vfpr_dst);
 		free_netdev(vfpr_netdev);
 		return err;
 	}
@@ -1158,6 +1164,7 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
  **/
 void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 {
+	struct i40e_vfpr_netdev_priv *priv;
 	struct i40e_pf *pf = vf->pf;
 
 	if (!vf->vfpr_netdev)
@@ -1166,6 +1173,8 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 	dev_info(&pf->pdev->dev, "Freeing VF Port representor(%s)\n",
 		 vf->vfpr_netdev->name);
 
+	priv = netdev_priv(vf->vfpr_netdev);
+	dst_release((struct dst_entry *)priv->vfpr_dst);
 	unregister_netdev(vf->vfpr_netdev);
 	free_netdev(vf->vfpr_netdev);
 
@@ -1940,8 +1949,10 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 	if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
 		aq_ret = I40E_ERR_TIMEOUT;
 
-	if ((aq_ret == 0) && vf->vfpr_netdev)
+	if ((aq_ret == 0) && vf->vfpr_netdev) {
+		netif_tx_start_all_queues(vf->vfpr_netdev);
 		netif_carrier_on(vf->vfpr_netdev);
+	}
 
 error_param:
 	/* send the response to the VF */
@@ -1987,8 +1998,10 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
 
 	i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);
 
-	if ((aq_ret == 0) && vf->vfpr_netdev)
+	if ((aq_ret == 0) && vf->vfpr_netdev) {
+		netif_tx_stop_all_queues(vf->vfpr_netdev);
 		netif_carrier_off(vf->vfpr_netdev);
+	}
 
 error_param:
 	/* send the response to the VF */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 25ce93c..3dea207 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -74,6 +74,7 @@ enum i40e_vf_capabilities {
 
 /* VF Port representator netdev private structure */
 struct i40e_vfpr_netdev_priv {
+	struct metadata_dst *vfpr_dst;
 	struct i40e_vf *vf;
 };
 
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 6/7] i40e: Add support for exposing VF port statistics via VFPR netdev on the host.
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

From: Sridhar Samudrala <sridhar.samudrala@intel.com>

By default stats counted by HW are returned via the original ndo_get_stats64()
api. Stats counted in SW are returned via ndo_get_offload_stats() api.

Small script to demonstrate vfpr stats in switchdev mode.
PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1

# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip link set enp5s0f0 vf 0 mac 00:11:22:33:44:55
# ip link set enp5s0f0 vf 1 mac 00:11:22:33:44:56
# rmmod i40evf; modprobe i40evf

/* Create 2 namespaces and move the VFs to the corresponding ns */
# ip netns add ns0
# ip link set enp5s2 netns ns0
# ip netns exec ns0 ip addr add 192.168.1.10/24 dev enp5s2
# ip netns exec ns0 ip link set enp5s2 up
# ip netns add ns1
# ip link set enp5s2f1 netns ns1
# ip netns exec ns1 ip addr add 192.168.1.11/24 dev enp5s2f1
# ip netns exec ns1 ip link set enp5s2f1 up

/* bring up pf and vfpr netdevs */
# ip link set enp5s0f0 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* Create a linux bridge and add vfpr netdevs to it. */
# ip link add vfpr-br type bridge
# ip link set enp5s0f0-vf0 master vfpr-br
# ip link set enp5s0f0-vf1 master vfpr-br
# ip addr add 192.168.1.1/24 dev vfpr-br
# ip link set vfpr-br up

# ip netns exec ns0 ping -c3 192.168.1.11
# ip netns exec ns1 ping -c3 192.168.1.10

# ip netns exec ns0 ip -s l show enp5s2
56: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:11:22:33:44:55 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1468       18       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1398       17       0       0       0       0
# ip -s l show enp5s0f0-vf0
52: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vfpr-br state UP mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1398       17       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1468       18       0       0       0       0
# ip netns exec ns1 ip -s l show enp5s2f1
57: enp5s2f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:11:22:33:44:56 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1486       18       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1538       19       0       0       0       0
# ip -s l show enp5s0f0-vf1
53: enp5s0f0-vf1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vfpr-br state UP mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1538       19       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1486       18       0       0       0       0

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        |  44 ++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 110 +++++++++++++++++++++
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  10 ++
 3 files changed, 162 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index f43d1df..d1583ee 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1279,6 +1279,32 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring,
 }
 
 /**
+ * i40e_vfpr_receive_skb
+ * @vf: pointer to VF
+ * @skb: packet to send up
+ *
+ * Update skb dev to vfpr netdev and rx stats.
+ **/
+static void i40e_vfpr_receive_skb(struct i40e_vf *vf, struct sk_buff *skb)
+{
+	struct i40e_vfpr_netdev_priv *priv;
+	struct vfpr_pcpu_stats *vfpr_stats;
+
+	if (!vf->vfpr_netdev)
+		return;
+
+	skb->dev = vf->vfpr_netdev;
+
+	priv = netdev_priv(vf->vfpr_netdev);
+	vfpr_stats = this_cpu_ptr(priv->vfpr_stats);
+
+	u64_stats_update_begin(&vfpr_stats->syncp);
+	vfpr_stats->rx_packets++;
+	vfpr_stats->rx_bytes += skb->len;
+	u64_stats_update_end(&vfpr_stats->syncp);
+}
+
+/**
  * i40e_receive_skb - Send a completed packet up the stack
  * @rx_ring:  rx ring in play
  * @skb: packet to send up
@@ -1310,7 +1336,7 @@ static void i40e_receive_skb(struct i40e_ring *rx_ring,
 		vf = &pf->vf[vf_id];
 		if (ether_addr_equal(eth->h_source,
 				     vf->default_lan_addr.addr)) {
-			skb->dev = vf->vfpr_netdev;
+			i40e_vfpr_receive_skb(vf, skb);
 			break;
 		}
 	}
@@ -3428,11 +3454,25 @@ netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
 	struct i40e_vf *vf = priv->vf;
 	struct i40e_pf *pf = vf->pf;
 	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+	int ret;
 
 	skb_dst_drop(skb);
 	dst_hold(&priv->vfpr_dst->dst);
 	skb_dst_set(skb, &priv->vfpr_dst->dst);
 	skb->dev = vsi->netdev;
 
-	return dev_queue_xmit(skb);
+	ret = dev_queue_xmit(skb);
+	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+		struct vfpr_pcpu_stats *vfpr_stats;
+
+		vfpr_stats = this_cpu_ptr(priv->vfpr_stats);
+		u64_stats_update_begin(&vfpr_stats->syncp);
+		vfpr_stats->tx_packets++;
+		vfpr_stats->tx_bytes += skb->len;
+		u64_stats_update_end(&vfpr_stats->syncp);
+	} else {
+		this_cpu_inc(priv->vfpr_stats->tx_drops);
+	}
+
+	return ret;
 }
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 7211fba..5915280 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1057,10 +1057,112 @@ static int i40e_vfpr_netdev_stop(struct net_device *dev)
 	return 0;
 }
 
+/**
+ * i40e_vfpr_netdev_get_stats64
+ * @dev: network interface device structure
+ * @stats: netlink stats structure
+ *
+ * Returns the hw statistics from the VSI corresponding to the associated VFPR
+ **/
+static struct rtnl_link_stats64 *
+i40e_vfpr_netdev_get_stats64(struct net_device *netdev,
+			     struct rtnl_link_stats64 *stats)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(netdev);
+	struct i40e_vf *vf = priv->vf;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi;
+	struct i40e_eth_stats *estats;
+
+	vsi = pf->vsi[vf->lan_vsi_idx];
+	i40e_update_stats(vsi);
+
+	estats = &vsi->eth_stats;
+
+	/* TX and RX stats are flipped as we are returning the stats as seen
+	 * at the switch port corresponding to the VF.
+	 */
+	stats->rx_packets = estats->tx_unicast + estats->tx_multicast +
+			    estats->tx_broadcast;
+	stats->tx_packets = estats->rx_unicast + estats->rx_multicast +
+			    estats->rx_broadcast;
+	stats->rx_bytes = estats->tx_bytes;
+	stats->tx_bytes = estats->rx_bytes;
+	stats->rx_dropped = estats->tx_discards;
+	stats->tx_dropped = estats->rx_discards;
+
+	return stats;
+}
+
+/**
+ * i40e_vfpr_get_cpu_hit_stats64
+ * @dev: network interface device structure
+ * @stats: netlink stats structure
+ *
+ * stats are filled from the priv structure. correspond to the packets
+ * that are seen by the cpu and sent/received via vfpr netdev.
+ **/
+static int
+i40e_vfpr_get_cpu_hit_stats64(const struct net_device *dev,
+			      struct rtnl_link_stats64 *stats)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	int i;
+
+	for_each_possible_cpu(i) {
+		struct vfpr_pcpu_stats *vfpr_stats;
+		u64 tbytes, tpkts, tdrops, rbytes, rpkts;
+		unsigned int start;
+
+		vfpr_stats = per_cpu_ptr(priv->vfpr_stats, i);
+		do {
+			start = u64_stats_fetch_begin_irq(&vfpr_stats->syncp);
+			tbytes = vfpr_stats->tx_bytes;
+			tpkts = vfpr_stats->tx_packets;
+			tdrops = vfpr_stats->tx_drops;
+			rbytes = vfpr_stats->rx_bytes;
+			rpkts = vfpr_stats->rx_packets;
+		} while (u64_stats_fetch_retry_irq(&vfpr_stats->syncp, start));
+		stats->tx_bytes += tbytes;
+		stats->tx_packets += tpkts;
+		stats->tx_dropped += tdrops;
+		stats->rx_bytes += rbytes;
+		stats->rx_packets += rpkts;
+	}
+
+	return 0;
+}
+
+static bool
+i40e_vfpr_netdev_has_offload_stats(const struct net_device *dev, int attr_id)
+{
+	switch (attr_id) {
+	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
+		return true;
+	}
+
+	return false;
+}
+
+static int
+i40e_vfpr_netdev_get_offload_stats(int attr_id, const struct net_device *dev,
+				   void *sp)
+{
+	switch (attr_id) {
+	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
+		return i40e_vfpr_get_cpu_hit_stats64(dev, sp);
+	}
+
+	return -EINVAL;
+}
+
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
 	.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
+	.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
+	.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
+	.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
 };
 
 /**
@@ -1119,6 +1221,13 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	pf->vf[vf_num].vfpr_netdev = vfpr_netdev;
 
 	priv = netdev_priv(vfpr_netdev);
+	priv->vfpr_stats = netdev_alloc_pcpu_stats(struct vfpr_pcpu_stats);
+	if (!priv->vfpr_stats) {
+		dev_err(&pf->pdev->dev, "alloc_pcpu_stats failed for vf:%d\n",
+			vf_num);
+		free_netdev(vfpr_netdev);
+		return -ENOMEM;
+	}
 	priv->vf = &pf->vf[vf_num];
 	priv->vfpr_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
 					    GFP_KERNEL);
@@ -1175,6 +1284,7 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 
 	priv = netdev_priv(vf->vfpr_netdev);
 	dst_release((struct dst_entry *)priv->vfpr_dst);
+	free_percpu(priv->vfpr_stats);
 	unregister_netdev(vf->vfpr_netdev);
 	free_netdev(vf->vfpr_netdev);
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 3dea207..52ba9d5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -72,10 +72,20 @@ enum i40e_vf_capabilities {
 	I40E_VIRTCHNL_VF_CAP_IWARP,
 };
 
+struct vfpr_pcpu_stats {
+	u64                     tx_packets;
+	u64                     tx_bytes;
+	u64                     tx_drops;
+	u64                     rx_packets;
+	u64                     rx_bytes;
+	struct u64_stats_sync   syncp;
+};
+
 /* VF Port representator netdev private structure */
 struct i40e_vfpr_netdev_priv {
 	struct metadata_dst *vfpr_dst;
 	struct i40e_vf *vf;
+	struct vfpr_pcpu_stats *vfpr_stats;
 };
 
 /* VF information structure */
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 6/7] i40e: Add support for exposing VF port statistics via VFPR netdev on the host.
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

From: Sridhar Samudrala <sridhar.samudrala@intel.com>

By default stats counted by HW are returned via the original ndo_get_stats64()
api. Stats counted in SW are returned via ndo_get_offload_stats() api.

Small script to demonstrate vfpr stats in switchdev mode.
PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1

# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip link set enp5s0f0 vf 0 mac 00:11:22:33:44:55
# ip link set enp5s0f0 vf 1 mac 00:11:22:33:44:56
# rmmod i40evf; modprobe i40evf

/* Create 2 namespaces and move the VFs to the corresponding ns */
# ip netns add ns0
# ip link set enp5s2 netns ns0
# ip netns exec ns0 ip addr add 192.168.1.10/24 dev enp5s2
# ip netns exec ns0 ip link set enp5s2 up
# ip netns add ns1
# ip link set enp5s2f1 netns ns1
# ip netns exec ns1 ip addr add 192.168.1.11/24 dev enp5s2f1
# ip netns exec ns1 ip link set enp5s2f1 up

/* bring up pf and vfpr netdevs */
# ip link set enp5s0f0 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up

/* Create a linux bridge and add vfpr netdevs to it. */
# ip link add vfpr-br type bridge
# ip link set enp5s0f0-vf0 master vfpr-br
# ip link set enp5s0f0-vf1 master vfpr-br
# ip addr add 192.168.1.1/24 dev vfpr-br
# ip link set vfpr-br up

# ip netns exec ns0 ping -c3 192.168.1.11
# ip netns exec ns1 ping -c3 192.168.1.10

# ip netns exec ns0 ip -s l show enp5s2
56: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:11:22:33:44:55 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1468       18       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1398       17       0       0       0       0
# ip -s l show enp5s0f0-vf0
52: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vfpr-br state UP mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1398       17       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1468       18       0       0       0       0
# ip netns exec ns1 ip -s l show enp5s2f1
57: enp5s2f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:11:22:33:44:56 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1486       18       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1538       19       0       0       0       0
# ip -s l show enp5s0f0-vf1
53: enp5s0f0-vf1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vfpr-br state UP mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    1538       19       0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    1486       18       0       0       0       0

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_txrx.c        |  44 ++++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 110 +++++++++++++++++++++
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h |  10 ++
 3 files changed, 162 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index f43d1df..d1583ee 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1279,6 +1279,32 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring,
 }
 
 /**
+ * i40e_vfpr_receive_skb
+ * @vf: pointer to VF
+ * @skb: packet to send up
+ *
+ * Update skb dev to vfpr netdev and rx stats.
+ **/
+static void i40e_vfpr_receive_skb(struct i40e_vf *vf, struct sk_buff *skb)
+{
+	struct i40e_vfpr_netdev_priv *priv;
+	struct vfpr_pcpu_stats *vfpr_stats;
+
+	if (!vf->vfpr_netdev)
+		return;
+
+	skb->dev = vf->vfpr_netdev;
+
+	priv = netdev_priv(vf->vfpr_netdev);
+	vfpr_stats = this_cpu_ptr(priv->vfpr_stats);
+
+	u64_stats_update_begin(&vfpr_stats->syncp);
+	vfpr_stats->rx_packets++;
+	vfpr_stats->rx_bytes += skb->len;
+	u64_stats_update_end(&vfpr_stats->syncp);
+}
+
+/**
  * i40e_receive_skb - Send a completed packet up the stack
  * @rx_ring:  rx ring in play
  * @skb: packet to send up
@@ -1310,7 +1336,7 @@ static void i40e_receive_skb(struct i40e_ring *rx_ring,
 		vf = &pf->vf[vf_id];
 		if (ether_addr_equal(eth->h_source,
 				     vf->default_lan_addr.addr)) {
-			skb->dev = vf->vfpr_netdev;
+			i40e_vfpr_receive_skb(vf, skb);
 			break;
 		}
 	}
@@ -3428,11 +3454,25 @@ netdev_tx_t i40e_vfpr_netdev_start_xmit(struct sk_buff *skb,
 	struct i40e_vf *vf = priv->vf;
 	struct i40e_pf *pf = vf->pf;
 	struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+	int ret;
 
 	skb_dst_drop(skb);
 	dst_hold(&priv->vfpr_dst->dst);
 	skb_dst_set(skb, &priv->vfpr_dst->dst);
 	skb->dev = vsi->netdev;
 
-	return dev_queue_xmit(skb);
+	ret = dev_queue_xmit(skb);
+	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+		struct vfpr_pcpu_stats *vfpr_stats;
+
+		vfpr_stats = this_cpu_ptr(priv->vfpr_stats);
+		u64_stats_update_begin(&vfpr_stats->syncp);
+		vfpr_stats->tx_packets++;
+		vfpr_stats->tx_bytes += skb->len;
+		u64_stats_update_end(&vfpr_stats->syncp);
+	} else {
+		this_cpu_inc(priv->vfpr_stats->tx_drops);
+	}
+
+	return ret;
 }
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 7211fba..5915280 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1057,10 +1057,112 @@ static int i40e_vfpr_netdev_stop(struct net_device *dev)
 	return 0;
 }
 
+/**
+ * i40e_vfpr_netdev_get_stats64
+ * @dev: network interface device structure
+ * @stats: netlink stats structure
+ *
+ * Returns the hw statistics from the VSI corresponding to the associated VFPR
+ **/
+static struct rtnl_link_stats64 *
+i40e_vfpr_netdev_get_stats64(struct net_device *netdev,
+			     struct rtnl_link_stats64 *stats)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(netdev);
+	struct i40e_vf *vf = priv->vf;
+	struct i40e_pf *pf = vf->pf;
+	struct i40e_vsi *vsi;
+	struct i40e_eth_stats *estats;
+
+	vsi = pf->vsi[vf->lan_vsi_idx];
+	i40e_update_stats(vsi);
+
+	estats = &vsi->eth_stats;
+
+	/* TX and RX stats are flipped as we are returning the stats as seen
+	 * at the switch port corresponding to the VF.
+	 */
+	stats->rx_packets = estats->tx_unicast + estats->tx_multicast +
+			    estats->tx_broadcast;
+	stats->tx_packets = estats->rx_unicast + estats->rx_multicast +
+			    estats->rx_broadcast;
+	stats->rx_bytes = estats->tx_bytes;
+	stats->tx_bytes = estats->rx_bytes;
+	stats->rx_dropped = estats->tx_discards;
+	stats->tx_dropped = estats->rx_discards;
+
+	return stats;
+}
+
+/**
+ * i40e_vfpr_get_cpu_hit_stats64
+ * @dev: network interface device structure
+ * @stats: netlink stats structure
+ *
+ * stats are filled from the priv structure. correspond to the packets
+ * that are seen by the cpu and sent/received via vfpr netdev.
+ **/
+static int
+i40e_vfpr_get_cpu_hit_stats64(const struct net_device *dev,
+			      struct rtnl_link_stats64 *stats)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	int i;
+
+	for_each_possible_cpu(i) {
+		struct vfpr_pcpu_stats *vfpr_stats;
+		u64 tbytes, tpkts, tdrops, rbytes, rpkts;
+		unsigned int start;
+
+		vfpr_stats = per_cpu_ptr(priv->vfpr_stats, i);
+		do {
+			start = u64_stats_fetch_begin_irq(&vfpr_stats->syncp);
+			tbytes = vfpr_stats->tx_bytes;
+			tpkts = vfpr_stats->tx_packets;
+			tdrops = vfpr_stats->tx_drops;
+			rbytes = vfpr_stats->rx_bytes;
+			rpkts = vfpr_stats->rx_packets;
+		} while (u64_stats_fetch_retry_irq(&vfpr_stats->syncp, start));
+		stats->tx_bytes += tbytes;
+		stats->tx_packets += tpkts;
+		stats->tx_dropped += tdrops;
+		stats->rx_bytes += rbytes;
+		stats->rx_packets += rpkts;
+	}
+
+	return 0;
+}
+
+static bool
+i40e_vfpr_netdev_has_offload_stats(const struct net_device *dev, int attr_id)
+{
+	switch (attr_id) {
+	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
+		return true;
+	}
+
+	return false;
+}
+
+static int
+i40e_vfpr_netdev_get_offload_stats(int attr_id, const struct net_device *dev,
+				   void *sp)
+{
+	switch (attr_id) {
+	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
+		return i40e_vfpr_get_cpu_hit_stats64(dev, sp);
+	}
+
+	return -EINVAL;
+}
+
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
 	.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
+	.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
+	.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
+	.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
 };
 
 /**
@@ -1119,6 +1221,13 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	pf->vf[vf_num].vfpr_netdev = vfpr_netdev;
 
 	priv = netdev_priv(vfpr_netdev);
+	priv->vfpr_stats = netdev_alloc_pcpu_stats(struct vfpr_pcpu_stats);
+	if (!priv->vfpr_stats) {
+		dev_err(&pf->pdev->dev, "alloc_pcpu_stats failed for vf:%d\n",
+			vf_num);
+		free_netdev(vfpr_netdev);
+		return -ENOMEM;
+	}
 	priv->vf = &pf->vf[vf_num];
 	priv->vfpr_dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
 					    GFP_KERNEL);
@@ -1175,6 +1284,7 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
 
 	priv = netdev_priv(vf->vfpr_netdev);
 	dst_release((struct dst_entry *)priv->vfpr_dst);
+	free_percpu(priv->vfpr_stats);
 	unregister_netdev(vf->vfpr_netdev);
 	free_netdev(vf->vfpr_netdev);
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 3dea207..52ba9d5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -72,10 +72,20 @@ enum i40e_vf_capabilities {
 	I40E_VIRTCHNL_VF_CAP_IWARP,
 };
 
+struct vfpr_pcpu_stats {
+	u64                     tx_packets;
+	u64                     tx_bytes;
+	u64                     tx_drops;
+	u64                     rx_packets;
+	u64                     rx_bytes;
+	struct u64_stats_sync   syncp;
+};
+
 /* VF Port representator netdev private structure */
 struct i40e_vfpr_netdev_priv {
 	struct metadata_dst *vfpr_dst;
 	struct i40e_vf *vf;
+	struct vfpr_pcpu_stats *vfpr_stats;
 };
 
 /* VF information structure */
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

* Re: [next-queue v3 PATCH 6/7] i40e: Add support for exposing VF port statistics via VFPR netdev on the host.
  2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  8:37     ` kbuild test robot
  -1 siblings, 0 replies; 18+ messages in thread
From: kbuild test robot @ 2017-01-10  8:37 UTC (permalink / raw)
  To: Sridhar Samudrala
  Cc: kbuild-all, alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

[-- Attachment #1: Type: text/plain, Size: 1768 bytes --]

Hi Sridhar,

[auto build test ERROR on jkirsher-next-queue/dev-queue]
[cannot apply to v4.10-rc3 next-20170110]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Sridhar-Samudrala/i40e-Introduce-devlink-interface/20170110-140906
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git dev-queue
config: x86_64-rhel (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

>> drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:1163:28: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:1163:28: note: (near initialization for 'i40e_vfpr_netdev_ops.ndo_get_stats64')
   cc1: some warnings being treated as errors

vim +1163 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

  1157	}
  1158	
  1159	static const struct net_device_ops i40e_vfpr_netdev_ops = {
  1160		.ndo_open		= i40e_vfpr_netdev_open,
  1161		.ndo_stop		= i40e_vfpr_netdev_stop,
  1162		.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
> 1163		.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
  1164		.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
  1165		.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
  1166	};

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 38277 bytes --]

^ permalink raw reply	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 6/7] i40e: Add support for exposing VF port statistics via VFPR netdev on the host.
@ 2017-01-10  8:37     ` kbuild test robot
  0 siblings, 0 replies; 18+ messages in thread
From: kbuild test robot @ 2017-01-10  8:37 UTC (permalink / raw)
  To: intel-wired-lan

Hi Sridhar,

[auto build test ERROR on jkirsher-next-queue/dev-queue]
[cannot apply to v4.10-rc3 next-20170110]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Sridhar-Samudrala/i40e-Introduce-devlink-interface/20170110-140906
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git dev-queue
config: x86_64-rhel (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

>> drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:1163:28: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:1163:28: note: (near initialization for 'i40e_vfpr_netdev_ops.ndo_get_stats64')
   cc1: some warnings being treated as errors

vim +1163 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

  1157	}
  1158	
  1159	static const struct net_device_ops i40e_vfpr_netdev_ops = {
  1160		.ndo_open		= i40e_vfpr_netdev_open,
  1161		.ndo_stop		= i40e_vfpr_netdev_stop,
  1162		.ndo_start_xmit         = i40e_vfpr_netdev_start_xmit,
> 1163		.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
  1164		.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
  1165		.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
  1166	};

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
-------------- next part --------------
A non-text attachment was scrubbed...
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Type: application/gzip
Size: 38277 bytes
Desc: not available
URL: <http://lists.osuosl.org/pipermail/intel-wired-lan/attachments/20170110/690bded5/attachment-0001.bin>

^ permalink raw reply	[flat|nested] 18+ messages in thread

* [next-queue v3 PATCH 7/7] i40e: Add support to get switch id and port number for VFPR netdevs
  2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
@ 2017-01-10  0:59   ` Sridhar Samudrala
  -1 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: alexander.h.duyck, john.r.fastabend, anjali.singhai,
	jakub.kicinski, davem, scott.d.peterson, gerlitz.or, jiri,
	intel-wired-lan, netdev

Introduce switchdev_ops to PF and VFPR netdevs to return the switch id
via SWITCHDEV_ATTR_ID_PORT_PARENT_ID attribute.
Also, ndo_get_phys_port_name() support is added to VFPR netdevs to
return the port number.

PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip -d l show enp5s0f0
32: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 72 numrxqueues 72 gso_max_size 65536 gso_max_segs 65535 portid 6805ca2e7268 switchid 6805ca2e7268
    vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
    vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
# ip -d l show enp5s0f0-vf0
34: enp5s0f0-vf0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 portname 0 switchid 6805ca2e7268
# ip -d l show enp5s0f0-vf1
35: enp5s0f0-vf1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 portname 1 switchid 6805ca2e7268

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h             |  1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 28 +++++++++++++++
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 40 ++++++++++++++++++++++
 3 files changed, 69 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index d038bc1..09346a5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -56,6 +56,7 @@
 #include <linux/ptp_clock_kernel.h>
 #include <net/devlink.h>
 #include <net/dst_metadata.h>
+#include <net/switchdev.h>
 
 #include "i40e_type.h"
 #include "i40e_prototype.h"
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ac324e2..bb41fdc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9656,6 +9656,31 @@ static const struct net_device_ops i40e_netdev_ops = {
 	.ndo_xdp                = i40e_xdp,
 };
 
+static int i40e_pf_attr_get(struct net_device *dev, struct switchdev_attr *attr)
+{
+	struct i40e_netdev_priv *np = netdev_priv(dev);
+	struct i40e_vsi *vsi = np->vsi;
+	struct i40e_pf *pf = vsi->back;
+
+	if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY)
+		return -EOPNOTSUPP;
+
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+		attr->u.ppid.id_len = ETH_ALEN;
+		ether_addr_copy(attr->u.ppid.id, dev->dev_addr);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct switchdev_ops i40e_pf_switchdev_ops = {
+	.switchdev_port_attr_get        = i40e_pf_attr_get,
+};
+
 /**
  * i40e_config_netdev - Setup the netdev flags
  * @vsi: the VSI being configured
@@ -9775,6 +9800,9 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 #ifdef I40E_FCOE
 	i40e_fcoe_config_netdev(netdev, vsi);
 #endif
+#ifdef CONFIG_NET_SWITCHDEV
+	netdev->switchdev_ops = &i40e_pf_switchdev_ops;
+#endif
 
 	/* MTU range: 68 - 9706 */
 	netdev->min_mtu = ETH_MIN_MTU;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 5915280..2f84d70 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1156,6 +1156,22 @@ i40e_vfpr_netdev_get_offload_stats(int attr_id, const struct net_device *dev,
 	return -EINVAL;
 }
 
+static int
+i40e_vfpr_netdev_get_phys_port_name(struct net_device *dev, char *buf,
+				    size_t len)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	int ret;
+
+	ret = snprintf(buf, len, "%d", vf->vf_id);
+	if (ret >= len)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
@@ -1163,6 +1179,26 @@ static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
 	.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
 	.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
+	.ndo_get_phys_port_name	= i40e_vfpr_netdev_get_phys_port_name,
+};
+
+static int i40e_vfpr_attr_get(struct net_device *dev,
+			      struct switchdev_attr *attr)
+{
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+		attr->u.ppid.id_len = ETH_ALEN;
+		ether_addr_copy(attr->u.ppid.id, dev->dev_addr);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct switchdev_ops i40e_vfpr_switchdev_ops = {
+	.switchdev_port_attr_get        = i40e_vfpr_attr_get,
 };
 
 /**
@@ -1237,6 +1273,10 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
 	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
 
+#ifdef CONFIG_NET_SWITCHDEV
+	vfpr_netdev->switchdev_ops = &i40e_vfpr_switchdev_ops;
+#endif
+
 	netif_carrier_off(vfpr_netdev);
 	netif_tx_disable(vfpr_netdev);
 
-- 
2.5.5

^ permalink raw reply related	[flat|nested] 18+ messages in thread

* [Intel-wired-lan] [next-queue v3 PATCH 7/7] i40e: Add support to get switch id and port number for VFPR netdevs
@ 2017-01-10  0:59   ` Sridhar Samudrala
  0 siblings, 0 replies; 18+ messages in thread
From: Sridhar Samudrala @ 2017-01-10  0:59 UTC (permalink / raw)
  To: intel-wired-lan

Introduce switchdev_ops to PF and VFPR netdevs to return the switch id
via SWITCHDEV_ATTR_ID_PORT_PARENT_ID attribute.
Also, ndo_get_phys_port_name() support is added to VFPR netdevs to
return the port number.

PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip -d l show enp5s0f0
32: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 72 numrxqueues 72 gso_max_size 65536 gso_max_segs 65535 portid 6805ca2e7268 switchid 6805ca2e7268
    vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
    vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
# ip -d l show enp5s0f0-vf0
34: enp5s0f0-vf0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 portname 0 switchid 6805ca2e7268
# ip -d l show enp5s0f0-vf1
35: enp5s0f0-vf1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 portname 1 switchid 6805ca2e7268

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h             |  1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 28 +++++++++++++++
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 40 ++++++++++++++++++++++
 3 files changed, 69 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index d038bc1..09346a5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -56,6 +56,7 @@
 #include <linux/ptp_clock_kernel.h>
 #include <net/devlink.h>
 #include <net/dst_metadata.h>
+#include <net/switchdev.h>
 
 #include "i40e_type.h"
 #include "i40e_prototype.h"
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ac324e2..bb41fdc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9656,6 +9656,31 @@ static const struct net_device_ops i40e_netdev_ops = {
 	.ndo_xdp                = i40e_xdp,
 };
 
+static int i40e_pf_attr_get(struct net_device *dev, struct switchdev_attr *attr)
+{
+	struct i40e_netdev_priv *np = netdev_priv(dev);
+	struct i40e_vsi *vsi = np->vsi;
+	struct i40e_pf *pf = vsi->back;
+
+	if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY)
+		return -EOPNOTSUPP;
+
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+		attr->u.ppid.id_len = ETH_ALEN;
+		ether_addr_copy(attr->u.ppid.id, dev->dev_addr);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct switchdev_ops i40e_pf_switchdev_ops = {
+	.switchdev_port_attr_get        = i40e_pf_attr_get,
+};
+
 /**
  * i40e_config_netdev - Setup the netdev flags
  * @vsi: the VSI being configured
@@ -9775,6 +9800,9 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 #ifdef I40E_FCOE
 	i40e_fcoe_config_netdev(netdev, vsi);
 #endif
+#ifdef CONFIG_NET_SWITCHDEV
+	netdev->switchdev_ops = &i40e_pf_switchdev_ops;
+#endif
 
 	/* MTU range: 68 - 9706 */
 	netdev->min_mtu = ETH_MIN_MTU;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 5915280..2f84d70 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1156,6 +1156,22 @@ i40e_vfpr_netdev_get_offload_stats(int attr_id, const struct net_device *dev,
 	return -EINVAL;
 }
 
+static int
+i40e_vfpr_netdev_get_phys_port_name(struct net_device *dev, char *buf,
+				    size_t len)
+{
+	struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+	struct i40e_vf *vf = priv->vf;
+
+	int ret;
+
+	ret = snprintf(buf, len, "%d", vf->vf_id);
+	if (ret >= len)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
 static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_open		= i40e_vfpr_netdev_open,
 	.ndo_stop		= i40e_vfpr_netdev_stop,
@@ -1163,6 +1179,26 @@ static const struct net_device_ops i40e_vfpr_netdev_ops = {
 	.ndo_get_stats64        = i40e_vfpr_netdev_get_stats64,
 	.ndo_has_offload_stats  = i40e_vfpr_netdev_has_offload_stats,
 	.ndo_get_offload_stats  = i40e_vfpr_netdev_get_offload_stats,
+	.ndo_get_phys_port_name	= i40e_vfpr_netdev_get_phys_port_name,
+};
+
+static int i40e_vfpr_attr_get(struct net_device *dev,
+			      struct switchdev_attr *attr)
+{
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+		attr->u.ppid.id_len = ETH_ALEN;
+		ether_addr_copy(attr->u.ppid.id, dev->dev_addr);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct switchdev_ops i40e_vfpr_switchdev_ops = {
+	.switchdev_port_attr_get        = i40e_vfpr_attr_get,
 };
 
 /**
@@ -1237,6 +1273,10 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
 	vfpr_netdev->netdev_ops = &i40e_vfpr_netdev_ops;
 	eth_hw_addr_inherit(vfpr_netdev, vsi->netdev);
 
+#ifdef CONFIG_NET_SWITCHDEV
+	vfpr_netdev->switchdev_ops = &i40e_vfpr_switchdev_ops;
+#endif
+
 	netif_carrier_off(vfpr_netdev);
 	netif_tx_disable(vfpr_netdev);
 
-- 
2.5.5


^ permalink raw reply related	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2017-01-10  8:38 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-01-10  0:59 [next-queue v3 PATCH 0/7]i40e: Add VF Port Representator support for SR-IOV VFs Sridhar Samudrala
2017-01-10  0:59 ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 1/7] i40e: Introduce devlink interface Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 2/7] i40e: Introduce VF Port Representator(VFPR) netdevs Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 3/7] i40e: Sync link state between VFs and VFPRs Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 4/7] net: store port/representator id in metadata_dst Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 5/7] i40e: Add TX and RX support in switchdev mode Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  0:59 ` [next-queue v3 PATCH 6/7] i40e: Add support for exposing VF port statistics via VFPR netdev on the host Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala
2017-01-10  8:37   ` kbuild test robot
2017-01-10  8:37     ` [Intel-wired-lan] " kbuild test robot
2017-01-10  0:59 ` [next-queue v3 PATCH 7/7] i40e: Add support to get switch id and port number for VFPR netdevs Sridhar Samudrala
2017-01-10  0:59   ` [Intel-wired-lan] " Sridhar Samudrala

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