[PATCH net-next V4 0/8] {devlink,mlx5}: Add port function attributes for ipsec

[PATCH net-next V4 0/8] {devlink,mlx5}: Add port function attributes for ipsec

[Saeed Mahameed]

From: Saeed Mahameed <saeedm@nvidia.com>

v4:
 - Rebased on top of latest mlx5 changes, align with new code, fix build
   warnings

v3:
 - Changed newly introduced IPsec blocking routine
   and as an outcome of testing already existing one.
   I'm sending them together to avoid merge conflicts.
 - Refactored patches to separate IFC part
 - Simplified 
v2: https://lore.kernel.org/netdev/20230421104901.897946-1-dchumak@nvidia.com/
 - Improve docs of ipsec_crypto vs ipsec_packet devlink attributes
 - also see patches 2,4 for the changelog.

---------------------------------------------------------------------------------
From Dima:

Introduce hypervisor-level control knobs to set the functionality of PCI
VF devices passed through to guests. The administrator of a hypervisor
host may choose to change the settings of a port function from the
defaults configured by the device firmware.

The software stack has two types of IPsec offload - crypto and packet.
Specifically, the ip xfrm command has sub-commands for "state" and
"policy" that have an "offload" parameter. With ip xfrm state, both
crypto and packet offload types are supported, while ip xfrm policy can
only be offloaded in packet mode.

The series introduces two new boolean attributes of a port function:
ipsec_crypto and ipsec_packet. The goal is to provide a similar level of
granularity for controlling VF IPsec offload capabilities, which would
be aligned with the software model. This will allow users to decide if
they want both types of offload enabled for a VF, just one of them, or
none at all (which is the default).

At a high level, the difference between the two knobs is that with
ipsec_crypto, only XFRM state can be offloaded. Specifically, only the
crypto operation (Encrypt/Decrypt) is offloaded. With ipsec_packet, both
XFRM state and policy can be offloaded. Furthermore, in addition to
crypto operation offload, IPsec encapsulation is also offloaded. For
XFRM state, choosing between crypto and packet offload types is
possible. From the HW perspective, different resources may be required
for each offload type.

Examples of when a user prefers to enable IPsec packet offload for a VF
when using switchdev mode:

  $ devlink port show pci/0000:06:00.0/1
      pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
          function:
          hw_addr 00:00:00:00:00:00 roce enable migratable disable ipsec_crypto disable ipsec_packet disable

  $ devlink port function set pci/0000:06:00.0/1 ipsec_packet enable

  $ devlink port show pci/0000:06:00.0/1
      pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
          function:
          hw_addr 00:00:00:00:00:00 roce enable migratable disable ipsec_crypto disable ipsec_packet enable

This enables the corresponding IPsec capability of the function before
it's enumerated, so when the driver reads the capability from the device
firmware, it is enabled. The driver is then able to configure
corresponding features and ops of the VF net device to support IPsec
state and policy offloading.

Thanks

Dima Chumak (4):
  devlink: Expose port function commands to control IPsec crypto
    offloads
  devlink: Expose port function commands to control IPsec packet
    offloads
  net/mlx5: Implement devlink port function cmds to control ipsec_crypto
  net/mlx5: Implement devlink port function cmds to control ipsec_packet

Leon Romanovsky (4):
  net/mlx5: Drop extra layer of locks in IPsec
  net/mlx5e: Rewrite IPsec vs. TC block interface
  net/mlx5: Add IFC bits to support IPsec enable/disable
  net/mlx5: Provide an interface to block change of IPsec capabilities

 .../ethernet/mellanox/mlx5/switchdev.rst      |  20 +
 .../networking/devlink/devlink-port.rst       |  55 +++
 .../net/ethernet/mellanox/mlx5/core/Makefile  |   2 +-
 .../mellanox/mlx5/core/en_accel/ipsec.c       |  20 +-
 .../mellanox/mlx5/core/en_accel/ipsec_fs.c    |  63 ++-
 .../mellanox/mlx5/core/esw/devlink_port.c     |   6 +
 .../ethernet/mellanox/mlx5/core/esw/ipsec.c   | 369 ++++++++++++++++++
 .../net/ethernet/mellanox/mlx5/core/eswitch.c |  41 ++
 .../net/ethernet/mellanox/mlx5/core/eswitch.h |  48 ++-
 .../mellanox/mlx5/core/eswitch_offloads.c     | 240 +++++++++---
 include/linux/mlx5/driver.h                   |   1 +
 include/linux/mlx5/mlx5_ifc.h                 |   3 +
 include/net/devlink.h                         |  30 ++
 include/uapi/linux/devlink.h                  |   4 +
 net/devlink/leftover.c                        | 104 +++++
 15 files changed, 898 insertions(+), 108 deletions(-)
 create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c

-- 
2.41.0

[PATCH net-next V4 1/8] devlink: Expose port function commands to control IPsec crypto offloads

[Saeed Mahameed]

From: Dima Chumak <dchumak@nvidia.com>

Expose port function commands to enable / disable IPsec crypto offloads,
this is used to control the port IPsec capabilities.

When IPsec crypto is disabled for a function of the port (default),
function cannot offload any IPsec crypto operations (Encrypt/Decrypt and
XFRM state offloading). When enabled, IPsec crypto operations can be
offloaded by the function of the port.

Example of a PCI VF port which supports IPsec crypto offloads:

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_crypto disable

$ devlink port function set pci/0000:06:00.0/1 ipsec_crypto enable

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_crypto enable

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../networking/devlink/devlink-port.rst       | 27 ++++++++++
 include/net/devlink.h                         | 15 ++++++
 include/uapi/linux/devlink.h                  |  2 +
 net/devlink/leftover.c                        | 52 +++++++++++++++++++
 4 files changed, 96 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-port.rst b/Documentation/networking/devlink/devlink-port.rst
index 3da590953ce8..6983b11559cb 100644
--- a/Documentation/networking/devlink/devlink-port.rst
+++ b/Documentation/networking/devlink/devlink-port.rst
@@ -128,6 +128,9 @@ Users may also set the RoCE capability of the function using
 Users may also set the function as migratable using
 'devlink port function set migratable' command.
 
+Users may also set the IPsec crypto capability of the function using
+`devlink port function set ipsec_crypto` command.
+
 Function attributes
 ===================
 
@@ -240,6 +243,30 @@ Attach VF to the VM.
 Start the VM.
 Perform live migration.
 
+IPsec crypto capability setup
+-----------------------------
+When user enables IPsec crypto capability for a VF, user application can offload
+XFRM state crypto operation (Encrypt/Decrypt) to this VF.
+
+When IPsec crypto capability is disabled (default) for a VF, the XFRM state is
+processed in software by the kernel.
+
+- Get IPsec crypto capability of the VF device::
+
+    $ devlink port show pci/0000:06:00.0/2
+    pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
+        function:
+            hw_addr 00:00:00:00:00:00 ipsec_crypto disabled
+
+- Set IPsec crypto capability of the VF device::
+
+    $ devlink port function set pci/0000:06:00.0/2 ipsec_crypto enable
+
+    $ devlink port show pci/0000:06:00.0/2
+    pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
+        function:
+            hw_addr 00:00:00:00:00:00 ipsec_crypto enabled
+
 Subfunction
 ============
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index f7fec0791acc..1cf07a820a0e 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1583,6 +1583,15 @@ void devlink_free(struct devlink *devlink);
  *		       Should be used by device drivers set
  *		       the admin state of a function managed
  *		       by the devlink port.
+ * @port_fn_ipsec_crypto_get: Callback used to get port function's ipsec_crypto
+ *			      capability. Should be used by device drivers
+ *			      to report the current state of ipsec_crypto
+ *			      capability of a function managed by the devlink
+ *			      port.
+ * @port_fn_ipsec_crypto_set: Callback used to set port function's ipsec_crypto
+ *			      capability. Should be used by device drivers to
+ *			      enable/disable ipsec_crypto capability of a
+ *			      function managed by the devlink port.
  *
  * Note: Driver should return -EOPNOTSUPP if it doesn't support
  * port function (@port_fn_*) handling for a particular port.
@@ -1620,6 +1629,12 @@ struct devlink_port_ops {
 	int (*port_fn_state_set)(struct devlink_port *port,
 				 enum devlink_port_fn_state state,
 				 struct netlink_ext_ack *extack);
+	int (*port_fn_ipsec_crypto_get)(struct devlink_port *devlink_port,
+					bool *is_enable,
+					struct netlink_ext_ack *extack);
+	int (*port_fn_ipsec_crypto_set)(struct devlink_port *devlink_port,
+					bool enable,
+					struct netlink_ext_ack *extack);
 };
 
 void devlink_port_init(struct devlink *devlink,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 3782d4219ac9..f9ae9a058ad2 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -661,6 +661,7 @@ enum devlink_resource_unit {
 enum devlink_port_fn_attr_cap {
 	DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT,
 	DEVLINK_PORT_FN_ATTR_CAP_MIGRATABLE_BIT,
+	DEVLINK_PORT_FN_ATTR_CAP_IPSEC_CRYPTO_BIT,
 
 	/* Add new caps above */
 	__DEVLINK_PORT_FN_ATTR_CAPS_MAX,
@@ -669,6 +670,7 @@ enum devlink_port_fn_attr_cap {
 #define DEVLINK_PORT_FN_CAP_ROCE _BITUL(DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT)
 #define DEVLINK_PORT_FN_CAP_MIGRATABLE \
 	_BITUL(DEVLINK_PORT_FN_ATTR_CAP_MIGRATABLE_BIT)
+#define DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO _BITUL(DEVLINK_PORT_FN_ATTR_CAP_IPSEC_CRYPTO_BIT)
 
 enum devlink_port_function_attr {
 	DEVLINK_PORT_FUNCTION_ATTR_UNSPEC,
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index e2cd13958cc2..fcc1a06cae48 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -492,6 +492,28 @@ static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port,
 	return 0;
 }
 
+static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
+					     struct nla_bitfield32 *caps,
+					     struct netlink_ext_ack *extack)
+{
+	bool is_enable;
+	int err;
+
+	if (!devlink_port->ops->port_fn_ipsec_crypto_get ||
+	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+		return 0;
+
+	err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable);
+	return 0;
+}
+
 static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 				     struct sk_buff *msg,
 				     struct netlink_ext_ack *extack,
@@ -508,6 +530,10 @@ static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 	if (err)
 		return err;
 
+	err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack);
+	if (err)
+		return err;
+
 	if (!caps.selector)
 		return 0;
 	err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
@@ -838,6 +864,13 @@ devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
 						   extack);
 }
 
+static int
+devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
+				 struct netlink_ext_ack *extack)
+{
+	return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
+}
+
 static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 				    const struct nlattr *attr,
 				    struct netlink_ext_ack *extack)
@@ -862,6 +895,13 @@ static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 		if (err)
 			return err;
 	}
+	if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
+		err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value &
+						       DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO,
+						       extack);
+		if (err)
+			return err;
+	}
 	return 0;
 }
 
@@ -1226,6 +1266,18 @@ static int devlink_port_function_validate(struct devlink_port *devlink_port,
 				return -EOPNOTSUPP;
 			}
 		}
+		if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
+			if (!ops->port_fn_ipsec_crypto_set) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "Port doesn't support ipsec_crypto function attribute");
+				return -EOPNOTSUPP;
+			}
+			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "ipsec_crypto function attribute supported for VFs only");
+				return -EOPNOTSUPP;
+			}
+		}
 	}
 	return 0;
 }
-- 
2.41.0

[PATCH net-next V4 2/8] devlink: Expose port function commands to control IPsec packet offloads

[Saeed Mahameed]

From: Dima Chumak <dchumak@nvidia.com>

Expose port function commands to enable / disable IPsec packet offloads,
this is used to control the port IPsec capabilities.

When IPsec packet is disabled for a function of the port (default),
function cannot offload IPsec packet operations (encapsulation and XFRM
policy offload). When enabled, IPsec packet operations can be offloaded
by the function of the port, which includes crypto operation
(Encrypt/Decrypt), IPsec encapsulation and XFRM state and policy
offload.

Example of a PCI VF port which supports IPsec packet offloads:

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet disable

$ devlink port function set pci/0000:06:00.0/1 ipsec_packet enable

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet enable

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../networking/devlink/devlink-port.rst       | 28 ++++++++++
 include/net/devlink.h                         | 15 ++++++
 include/uapi/linux/devlink.h                  |  2 +
 net/devlink/leftover.c                        | 52 +++++++++++++++++++
 4 files changed, 97 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-port.rst b/Documentation/networking/devlink/devlink-port.rst
index 6983b11559cb..f5adb910427a 100644
--- a/Documentation/networking/devlink/devlink-port.rst
+++ b/Documentation/networking/devlink/devlink-port.rst
@@ -131,6 +131,9 @@ Users may also set the function as migratable using
 Users may also set the IPsec crypto capability of the function using
 `devlink port function set ipsec_crypto` command.
 
+Users may also set the IPsec packet capability of the function using
+`devlink port function set ipsec_packet` command.
+
 Function attributes
 ===================
 
@@ -267,6 +270,31 @@ processed in software by the kernel.
         function:
             hw_addr 00:00:00:00:00:00 ipsec_crypto enabled
 
+IPsec packet capability setup
+-----------------------------
+When user enables IPsec packet capability for a VF, user application can offload
+XFRM state and policy crypto operation (Encrypt/Decrypt) to this VF, as well as
+IPsec encapsulation.
+
+When IPsec packet capability is disabled (default) for a VF, the XFRM state and
+policy is processed in software by the kernel.
+
+- Get IPsec packet capability of the VF device::
+
+    $ devlink port show pci/0000:06:00.0/2
+    pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
+        function:
+            hw_addr 00:00:00:00:00:00 ipsec_packet disabled
+
+- Set IPsec packet capability of the VF device::
+
+    $ devlink port function set pci/0000:06:00.0/2 ipsec_packet enable
+
+    $ devlink port show pci/0000:06:00.0/2
+    pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
+        function:
+            hw_addr 00:00:00:00:00:00 ipsec_packet enabled
+
 Subfunction
 ============
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 1cf07a820a0e..29fd1b4ee654 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1592,6 +1592,15 @@ void devlink_free(struct devlink *devlink);
  *			      capability. Should be used by device drivers to
  *			      enable/disable ipsec_crypto capability of a
  *			      function managed by the devlink port.
+ * @port_fn_ipsec_packet_get: Callback used to get port function's ipsec_packet
+ *			      capability. Should be used by device drivers
+ *			      to report the current state of ipsec_packet
+ *			      capability of a function managed by the devlink
+ *			      port.
+ * @port_fn_ipsec_packet_set: Callback used to set port function's ipsec_packet
+ *			      capability. Should be used by device drivers to
+ *			      enable/disable ipsec_packet capability of a
+ *			      function managed by the devlink port.
  *
  * Note: Driver should return -EOPNOTSUPP if it doesn't support
  * port function (@port_fn_*) handling for a particular port.
@@ -1635,6 +1644,12 @@ struct devlink_port_ops {
 	int (*port_fn_ipsec_crypto_set)(struct devlink_port *devlink_port,
 					bool enable,
 					struct netlink_ext_ack *extack);
+	int (*port_fn_ipsec_packet_get)(struct devlink_port *devlink_port,
+					bool *is_enable,
+					struct netlink_ext_ack *extack);
+	int (*port_fn_ipsec_packet_set)(struct devlink_port *devlink_port,
+					bool enable,
+					struct netlink_ext_ack *extack);
 };
 
 void devlink_port_init(struct devlink *devlink,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index f9ae9a058ad2..03875e078be8 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -662,6 +662,7 @@ enum devlink_port_fn_attr_cap {
 	DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT,
 	DEVLINK_PORT_FN_ATTR_CAP_MIGRATABLE_BIT,
 	DEVLINK_PORT_FN_ATTR_CAP_IPSEC_CRYPTO_BIT,
+	DEVLINK_PORT_FN_ATTR_CAP_IPSEC_PACKET_BIT,
 
 	/* Add new caps above */
 	__DEVLINK_PORT_FN_ATTR_CAPS_MAX,
@@ -671,6 +672,7 @@ enum devlink_port_fn_attr_cap {
 #define DEVLINK_PORT_FN_CAP_MIGRATABLE \
 	_BITUL(DEVLINK_PORT_FN_ATTR_CAP_MIGRATABLE_BIT)
 #define DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO _BITUL(DEVLINK_PORT_FN_ATTR_CAP_IPSEC_CRYPTO_BIT)
+#define DEVLINK_PORT_FN_CAP_IPSEC_PACKET _BITUL(DEVLINK_PORT_FN_ATTR_CAP_IPSEC_PACKET_BIT)
 
 enum devlink_port_function_attr {
 	DEVLINK_PORT_FUNCTION_ATTR_UNSPEC,
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index fcc1a06cae48..149752bc9f2d 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -514,6 +514,28 @@ static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
 	return 0;
 }
 
+static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port,
+					     struct nla_bitfield32 *caps,
+					     struct netlink_ext_ack *extack)
+{
+	bool is_enable;
+	int err;
+
+	if (!devlink_port->ops->port_fn_ipsec_packet_get ||
+	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+		return 0;
+
+	err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable);
+	return 0;
+}
+
 static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 				     struct sk_buff *msg,
 				     struct netlink_ext_ack *extack,
@@ -534,6 +556,10 @@ static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 	if (err)
 		return err;
 
+	err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack);
+	if (err)
+		return err;
+
 	if (!caps.selector)
 		return 0;
 	err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
@@ -871,6 +897,13 @@ devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
 	return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
 }
 
+static int
+devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable,
+				 struct netlink_ext_ack *extack)
+{
+	return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);
+}
+
 static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 				    const struct nlattr *attr,
 				    struct netlink_ext_ack *extack)
@@ -902,6 +935,13 @@ static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 		if (err)
 			return err;
 	}
+	if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+		err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value &
+						       DEVLINK_PORT_FN_CAP_IPSEC_PACKET,
+						       extack);
+		if (err)
+			return err;
+	}
 	return 0;
 }
 
@@ -1278,6 +1318,18 @@ static int devlink_port_function_validate(struct devlink_port *devlink_port,
 				return -EOPNOTSUPP;
 			}
 		}
+		if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+			if (!ops->port_fn_ipsec_packet_set) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "Port doesn't support ipsec_packet function attribute");
+				return -EOPNOTSUPP;
+			}
+			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "ipsec_packet function attribute supported for VFs only");
+				return -EOPNOTSUPP;
+			}
+		}
 	}
 	return 0;
 }
-- 
2.41.0

[PATCH net-next V4 3/8] net/mlx5: Drop extra layer of locks in IPsec

[Saeed Mahameed]

From: Leon Romanovsky <leonro@nvidia.com>

There is no need in holding devlink lock as it gives nothing
compared to already used write mode_lock.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../mellanox/mlx5/core/eswitch_offloads.c      | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 67eab99f95b1..28c4b9724e38 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3903,38 +3903,28 @@ int mlx5_devlink_eswitch_inline_mode_get(struct devlink *devlink, u8 *mode)
 
 bool mlx5_eswitch_block_encap(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 
-	devl_lock(devlink);
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw)) {
-		devl_unlock(devlink);
-		/* Failure means no eswitch => not possible to change encap */
+	if (!mlx5_esw_allowed(esw))
 		return true;
-	}
 
 	down_write(&esw->mode_lock);
 	if (esw->mode != MLX5_ESWITCH_LEGACY &&
 	    esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) {
 		up_write(&esw->mode_lock);
-		devl_unlock(devlink);
 		return false;
 	}
 
 	esw->offloads.num_block_encap++;
 	up_write(&esw->mode_lock);
-	devl_unlock(devlink);
 	return true;
 }
 
 void mlx5_eswitch_unblock_encap(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw))
+	if (!mlx5_esw_allowed(esw))
 		return;
 
 	down_write(&esw->mode_lock);
-- 
2.41.0

[PATCH net-next V4 4/8] net/mlx5e: Rewrite IPsec vs. TC block interface

[Saeed Mahameed]

From: Leon Romanovsky <leonro@nvidia.com>

In the commit 366e46242b8e ("net/mlx5e: Make IPsec offload work together
with eswitch and TC"), new API to block IPsec vs. TC creation was introduced.

Internally, that API used devlink lock to avoid races with userspace, but it is
not really needed as dev->priv.eswitch is stable and can't be changed. So remove
dependency on devlink lock and move block encap code back to its original place.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../mellanox/mlx5/core/en_accel/ipsec_fs.c    | 63 +++++++------------
 .../net/ethernet/mellanox/mlx5/core/eswitch.h | 15 ++---
 .../mellanox/mlx5/core/eswitch_offloads.c     | 53 +++-------------
 3 files changed, 38 insertions(+), 93 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
index a1cfddd05bc4..7dba4221993f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
@@ -254,6 +254,8 @@ static void rx_destroy(struct mlx5_core_dev *mdev, struct mlx5e_ipsec *ipsec,
 	mlx5_del_flow_rules(rx->sa.rule);
 	mlx5_destroy_flow_group(rx->sa.group);
 	mlx5_destroy_flow_table(rx->ft.sa);
+	if (rx->allow_tunnel_mode)
+		mlx5_eswitch_unblock_encap(mdev);
 	if (rx == ipsec->rx_esw) {
 		mlx5_esw_ipsec_rx_status_destroy(ipsec, rx);
 	} else {
@@ -357,6 +359,8 @@ static int rx_create(struct mlx5_core_dev *mdev, struct mlx5e_ipsec *ipsec,
 		goto err_add;
 
 	/* Create FT */
+	if (mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_TUNNEL)
+		rx->allow_tunnel_mode = mlx5_eswitch_block_encap(mdev);
 	if (rx->allow_tunnel_mode)
 		flags = MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT;
 	ft = ipsec_ft_create(attr.ns, attr.sa_level, attr.prio, 2, flags);
@@ -411,6 +415,8 @@ static int rx_create(struct mlx5_core_dev *mdev, struct mlx5e_ipsec *ipsec,
 err_fs:
 	mlx5_destroy_flow_table(rx->ft.sa);
 err_fs_ft:
+	if (rx->allow_tunnel_mode)
+		mlx5_eswitch_unblock_encap(mdev);
 	mlx5_del_flow_rules(rx->status.rule);
 	mlx5_modify_header_dealloc(mdev, rx->status.modify_hdr);
 err_add:
@@ -428,26 +434,19 @@ static int rx_get(struct mlx5_core_dev *mdev, struct mlx5e_ipsec *ipsec,
 	if (rx->ft.refcnt)
 		goto skip;
 
-	if (mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_TUNNEL)
-		rx->allow_tunnel_mode = mlx5_eswitch_block_encap(mdev);
-
-	err = mlx5_eswitch_block_mode_trylock(mdev);
+	err = mlx5_eswitch_block_mode(mdev);
 	if (err)
-		goto err_out;
+		return err;
 
 	err = rx_create(mdev, ipsec, rx, family);
-	mlx5_eswitch_block_mode_unlock(mdev, err);
-	if (err)
-		goto err_out;
+	if (err) {
+		mlx5_eswitch_unblock_mode(mdev);
+		return err;
+	}
 
 skip:
 	rx->ft.refcnt++;
 	return 0;
-
-err_out:
-	if (rx->allow_tunnel_mode)
-		mlx5_eswitch_unblock_encap(mdev);
-	return err;
 }
 
 static void rx_put(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_rx *rx,
@@ -456,12 +455,8 @@ static void rx_put(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_rx *rx,
 	if (--rx->ft.refcnt)
 		return;
 
-	mlx5_eswitch_unblock_mode_lock(ipsec->mdev);
 	rx_destroy(ipsec->mdev, ipsec, rx, family);
-	mlx5_eswitch_unblock_mode_unlock(ipsec->mdev);
-
-	if (rx->allow_tunnel_mode)
-		mlx5_eswitch_unblock_encap(ipsec->mdev);
+	mlx5_eswitch_unblock_mode(ipsec->mdev);
 }
 
 static struct mlx5e_ipsec_rx *rx_ft_get(struct mlx5_core_dev *mdev,
@@ -581,6 +576,8 @@ static void tx_destroy(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_tx *tx,
 		mlx5_destroy_flow_group(tx->sa.group);
 	}
 	mlx5_destroy_flow_table(tx->ft.sa);
+	if (tx->allow_tunnel_mode)
+		mlx5_eswitch_unblock_encap(ipsec->mdev);
 	mlx5_del_flow_rules(tx->status.rule);
 	mlx5_destroy_flow_table(tx->ft.status);
 }
@@ -621,6 +618,8 @@ static int tx_create(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_tx *tx,
 	if (err)
 		goto err_status_rule;
 
+	if (mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_TUNNEL)
+		tx->allow_tunnel_mode = mlx5_eswitch_block_encap(mdev);
 	if (tx->allow_tunnel_mode)
 		flags = MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT;
 	ft = ipsec_ft_create(tx->ns, attr.sa_level, attr.prio, 4, flags);
@@ -687,6 +686,8 @@ static int tx_create(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_tx *tx,
 err_sa_miss:
 	mlx5_destroy_flow_table(tx->ft.sa);
 err_sa_ft:
+	if (tx->allow_tunnel_mode)
+		mlx5_eswitch_unblock_encap(mdev);
 	mlx5_del_flow_rules(tx->status.rule);
 err_status_rule:
 	mlx5_destroy_flow_table(tx->ft.status);
@@ -720,32 +721,22 @@ static int tx_get(struct mlx5_core_dev *mdev, struct mlx5e_ipsec *ipsec,
 	if (tx->ft.refcnt)
 		goto skip;
 
-	if (mlx5_ipsec_device_caps(mdev) & MLX5_IPSEC_CAP_TUNNEL)
-		tx->allow_tunnel_mode = mlx5_eswitch_block_encap(mdev);
-
-	err = mlx5_eswitch_block_mode_trylock(mdev);
+	err = mlx5_eswitch_block_mode(mdev);
 	if (err)
-		goto err_out;
+		return err;
 
 	err = tx_create(ipsec, tx, ipsec->roce);
 	if (err) {
-		mlx5_eswitch_block_mode_unlock(mdev, err);
-		goto err_out;
+		mlx5_eswitch_unblock_mode(mdev);
+		return err;
 	}
 
 	if (tx == ipsec->tx_esw)
 		ipsec_esw_tx_ft_policy_set(mdev, tx->ft.pol);
 
-	mlx5_eswitch_block_mode_unlock(mdev, err);
-
 skip:
 	tx->ft.refcnt++;
 	return 0;
-
-err_out:
-	if (tx->allow_tunnel_mode)
-		mlx5_eswitch_unblock_encap(mdev);
-	return err;
 }
 
 static void tx_put(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_tx *tx)
@@ -753,19 +744,13 @@ static void tx_put(struct mlx5e_ipsec *ipsec, struct mlx5e_ipsec_tx *tx)
 	if (--tx->ft.refcnt)
 		return;
 
-	mlx5_eswitch_unblock_mode_lock(ipsec->mdev);
-
 	if (tx == ipsec->tx_esw) {
 		mlx5_esw_ipsec_restore_dest_uplink(ipsec->mdev);
 		ipsec_esw_tx_ft_policy_set(ipsec->mdev, NULL);
 	}
 
 	tx_destroy(ipsec, tx, ipsec->roce);
-
-	mlx5_eswitch_unblock_mode_unlock(ipsec->mdev);
-
-	if (tx->allow_tunnel_mode)
-		mlx5_eswitch_unblock_encap(ipsec->mdev);
+	mlx5_eswitch_unblock_mode(ipsec->mdev);
 }
 
 static struct mlx5_flow_table *tx_ft_get_policy(struct mlx5_core_dev *mdev,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 6fcece69d3be..ed3abcd70c46 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -829,10 +829,8 @@ int mlx5_eswitch_reload_reps(struct mlx5_eswitch *esw);
 bool mlx5_eswitch_block_encap(struct mlx5_core_dev *dev);
 void mlx5_eswitch_unblock_encap(struct mlx5_core_dev *dev);
 
-int mlx5_eswitch_block_mode_trylock(struct mlx5_core_dev *dev);
-void mlx5_eswitch_block_mode_unlock(struct mlx5_core_dev *dev, int err);
-void mlx5_eswitch_unblock_mode_lock(struct mlx5_core_dev *dev);
-void mlx5_eswitch_unblock_mode_unlock(struct mlx5_core_dev *dev);
+int mlx5_eswitch_block_mode(struct mlx5_core_dev *dev);
+void mlx5_eswitch_unblock_mode(struct mlx5_core_dev *dev);
 
 static inline int mlx5_eswitch_num_vfs(struct mlx5_eswitch *esw)
 {
@@ -916,13 +914,8 @@ static inline void mlx5_eswitch_unblock_encap(struct mlx5_core_dev *dev)
 {
 }
 
-static inline int mlx5_eswitch_block_mode_trylock(struct mlx5_core_dev *dev) { return 0; }
-
-static inline void mlx5_eswitch_block_mode_unlock(struct mlx5_core_dev *dev, int err) {}
-
-static inline void mlx5_eswitch_unblock_mode_lock(struct mlx5_core_dev *dev) {}
-
-static inline void mlx5_eswitch_unblock_mode_unlock(struct mlx5_core_dev *dev) {}
+static inline int mlx5_eswitch_block_mode(struct mlx5_core_dev *dev) { return 0; }
+static inline void mlx5_eswitch_unblock_mode(struct mlx5_core_dev *dev) {}
 #endif /* CONFIG_MLX5_ESWITCH */
 
 #endif /* __MLX5_ESWITCH_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 28c4b9724e38..d4697dadd27d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3641,65 +3641,32 @@ static bool esw_offloads_devlink_ns_eq_netdev_ns(struct devlink *devlink)
 	return net_eq(devl_net, netdev_net);
 }
 
-int mlx5_eswitch_block_mode_trylock(struct mlx5_core_dev *dev)
+int mlx5_eswitch_block_mode(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 	int err;
 
-	devl_lock(devlink);
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw)) {
-		/* Failure means no eswitch => not possible to change eswitch mode */
-		devl_unlock(devlink);
+	if (!mlx5_esw_allowed(esw))
 		return 0;
-	}
 
+	/* Take TC into account */
 	err = mlx5_esw_try_lock(esw);
-	if (err < 0) {
-		devl_unlock(devlink);
+	if (err < 0)
 		return err;
-	}
-
-	return 0;
-}
-
-void mlx5_eswitch_block_mode_unlock(struct mlx5_core_dev *dev, int err)
-{
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
-
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw))
-		return;
 
-	if (!err)
-		esw->offloads.num_block_mode++;
+	esw->offloads.num_block_mode++;
 	mlx5_esw_unlock(esw);
-	devl_unlock(devlink);
+	return 0;
 }
 
-void mlx5_eswitch_unblock_mode_lock(struct mlx5_core_dev *dev)
+void mlx5_eswitch_unblock_mode(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw))
+	if (!mlx5_esw_allowed(esw))
 		return;
 
 	down_write(&esw->mode_lock);
-}
-
-void mlx5_eswitch_unblock_mode_unlock(struct mlx5_core_dev *dev)
-{
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
-
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw))
-		return;
-
 	esw->offloads.num_block_mode--;
 	up_write(&esw->mode_lock);
 }
-- 
2.41.0

[PATCH net-next V4 5/8] net/mlx5: Add IFC bits to support IPsec enable/disable

[Saeed Mahameed]

From: Leon Romanovsky <leonro@nvidia.com>

Add hardware definitions to allow to control IPSec capabilities.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 include/linux/mlx5/mlx5_ifc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 08dcb1f43be7..fc3db401f8a2 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -65,9 +65,11 @@ enum {
 
 enum {
 	MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE        = 0x0,
+	MLX5_SET_HCA_CAP_OP_MOD_ETHERNET_OFFLOADS     = 0x1,
 	MLX5_SET_HCA_CAP_OP_MOD_ODP                   = 0x2,
 	MLX5_SET_HCA_CAP_OP_MOD_ATOMIC                = 0x3,
 	MLX5_SET_HCA_CAP_OP_MOD_ROCE                  = 0x4,
+	MLX5_SET_HCA_CAP_OP_MOD_IPSEC                 = 0x15,
 	MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE2       = 0x20,
 	MLX5_SET_HCA_CAP_OP_MOD_PORT_SELECTION        = 0x25,
 };
@@ -3451,6 +3453,7 @@ union mlx5_ifc_hca_cap_union_bits {
 	struct mlx5_ifc_virtio_emulation_cap_bits virtio_emulation_cap;
 	struct mlx5_ifc_macsec_cap_bits macsec_cap;
 	struct mlx5_ifc_crypto_cap_bits crypto_cap;
+	struct mlx5_ifc_ipsec_cap_bits ipsec_cap;
 	u8         reserved_at_0[0x8000];
 };
 
-- 
2.41.0

[PATCH net-next V4 6/8] net/mlx5: Provide an interface to block change of IPsec capabilities

[Saeed Mahameed]

From: Leon Romanovsky <leonro@nvidia.com>

mlx5 HW can't perform IPsec offload operation simultaneously both on PF
and VFs at the same time. While the previous patches added devlink knobs
to change IPsec capabilities dynamically, there is a need to add a logic
to block such IPsec capabilities for the cases when IPsec is already
configured.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../mellanox/mlx5/core/en_accel/ipsec.c       | 20 +++++++++++-
 .../net/ethernet/mellanox/mlx5/core/eswitch.c | 32 +++++++++++++++++++
 .../net/ethernet/mellanox/mlx5/core/eswitch.h |  9 ++++++
 include/linux/mlx5/driver.h                   |  1 +
 4 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index 3b88a8bb7082..7d4ceb9b9c16 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -38,6 +38,7 @@
 #include <net/netevent.h>
 
 #include "en.h"
+#include "eswitch.h"
 #include "ipsec.h"
 #include "ipsec_rxtx.h"
 #include "en_rep.h"
@@ -670,6 +671,11 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 	if (err)
 		goto err_xfrm;
 
+	if (!mlx5_eswitch_block_ipsec(priv->mdev)) {
+		err = -EBUSY;
+		goto err_xfrm;
+	}
+
 	/* check esn */
 	if (x->props.flags & XFRM_STATE_ESN)
 		mlx5e_ipsec_update_esn_state(sa_entry);
@@ -678,7 +684,7 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 
 	err = mlx5_ipsec_create_work(sa_entry);
 	if (err)
-		goto err_xfrm;
+		goto unblock_ipsec;
 
 	err = mlx5e_ipsec_create_dwork(sa_entry);
 	if (err)
@@ -735,6 +741,8 @@ static int mlx5e_xfrm_add_state(struct xfrm_state *x,
 	if (sa_entry->work)
 		kfree(sa_entry->work->data);
 	kfree(sa_entry->work);
+unblock_ipsec:
+	mlx5_eswitch_unblock_ipsec(priv->mdev);
 err_xfrm:
 	kfree(sa_entry);
 	NL_SET_ERR_MSG_WEAK_MOD(extack, "Device failed to offload this state");
@@ -764,6 +772,7 @@ static void mlx5e_xfrm_del_state(struct xfrm_state *x)
 static void mlx5e_xfrm_free_state(struct xfrm_state *x)
 {
 	struct mlx5e_ipsec_sa_entry *sa_entry = to_ipsec_sa_entry(x);
+	struct mlx5e_ipsec *ipsec = sa_entry->ipsec;
 
 	if (x->xso.flags & XFRM_DEV_OFFLOAD_FLAG_ACQ)
 		goto sa_entry_free;
@@ -780,6 +789,7 @@ static void mlx5e_xfrm_free_state(struct xfrm_state *x)
 	if (sa_entry->work)
 		kfree(sa_entry->work->data);
 	kfree(sa_entry->work);
+	mlx5_eswitch_unblock_ipsec(ipsec->mdev);
 sa_entry_free:
 	kfree(sa_entry);
 }
@@ -1055,6 +1065,11 @@ static int mlx5e_xfrm_add_policy(struct xfrm_policy *x,
 	pol_entry->x = x;
 	pol_entry->ipsec = priv->ipsec;
 
+	if (!mlx5_eswitch_block_ipsec(priv->mdev)) {
+		err = -EBUSY;
+		goto ipsec_busy;
+	}
+
 	mlx5e_ipsec_build_accel_pol_attrs(pol_entry, &pol_entry->attrs);
 	err = mlx5e_accel_ipsec_fs_add_pol(pol_entry);
 	if (err)
@@ -1064,6 +1079,8 @@ static int mlx5e_xfrm_add_policy(struct xfrm_policy *x,
 	return 0;
 
 err_fs:
+	mlx5_eswitch_unblock_ipsec(priv->mdev);
+ipsec_busy:
 	kfree(pol_entry);
 	NL_SET_ERR_MSG_MOD(extack, "Device failed to offload this policy");
 	return err;
@@ -1074,6 +1091,7 @@ static void mlx5e_xfrm_del_policy(struct xfrm_policy *x)
 	struct mlx5e_ipsec_pol_entry *pol_entry = to_ipsec_pol_entry(x);
 
 	mlx5e_accel_ipsec_fs_del_pol(pol_entry);
+	mlx5_eswitch_unblock_ipsec(pol_entry->ipsec->mdev);
 }
 
 static void mlx5e_xfrm_free_policy(struct xfrm_policy *x)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index db1c2a076364..38a149dd479f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -48,6 +48,7 @@
 #include "devlink.h"
 #include "ecpf.h"
 #include "en/mod_hdr.h"
+#include "en_accel/ipsec.h"
 
 enum {
 	MLX5_ACTION_NONE = 0,
@@ -2336,3 +2337,34 @@ struct mlx5_core_dev *mlx5_eswitch_get_core_dev(struct mlx5_eswitch *esw)
 	return mlx5_esw_allowed(esw) ? esw->dev : NULL;
 }
 EXPORT_SYMBOL(mlx5_eswitch_get_core_dev);
+
+bool mlx5_eswitch_block_ipsec(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
+
+	if (!mlx5_esw_allowed(esw))
+		return true;
+
+	mutex_lock(&esw->state_lock);
+	if (esw->enabled_ipsec_vf_count) {
+		mutex_unlock(&esw->state_lock);
+		return false;
+	}
+
+	dev->num_ipsec_offloads++;
+	mutex_unlock(&esw->state_lock);
+	return true;
+}
+
+void mlx5_eswitch_unblock_ipsec(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
+
+	if (!mlx5_esw_allowed(esw))
+		/* Failure means no eswitch => core dev is not a PF */
+		return;
+
+	mutex_lock(&esw->state_lock);
+	dev->num_ipsec_offloads--;
+	mutex_unlock(&esw->state_lock);
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index ed3abcd70c46..0e51fd066fcc 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -380,6 +380,7 @@ struct mlx5_eswitch {
 	struct blocking_notifier_head n_head;
 	struct xarray paired;
 	struct mlx5_devcom_comp_dev *devcom;
+	u16 enabled_ipsec_vf_count;
 };
 
 void esw_offloads_disable(struct mlx5_eswitch *esw);
@@ -855,6 +856,8 @@ mlx5_eswitch_get_slow_fdb(struct mlx5_eswitch *esw)
 
 int mlx5_eswitch_restore_ipsec_rule(struct mlx5_eswitch *esw, struct mlx5_flow_handle *rule,
 				    struct mlx5_esw_flow_attr *esw_attr, int attr_idx);
+bool mlx5_eswitch_block_ipsec(struct mlx5_core_dev *dev);
+void mlx5_eswitch_unblock_ipsec(struct mlx5_core_dev *dev);
 #else  /* CONFIG_MLX5_ESWITCH */
 /* eswitch API stubs */
 static inline int  mlx5_eswitch_init(struct mlx5_core_dev *dev) { return 0; }
@@ -916,6 +919,12 @@ static inline void mlx5_eswitch_unblock_encap(struct mlx5_core_dev *dev)
 
 static inline int mlx5_eswitch_block_mode(struct mlx5_core_dev *dev) { return 0; }
 static inline void mlx5_eswitch_unblock_mode(struct mlx5_core_dev *dev) {}
+static inline bool mlx5_eswitch_block_ipsec(struct mlx5_core_dev *dev)
+{
+	return false;
+}
+
+static inline void mlx5_eswitch_unblock_ipsec(struct mlx5_core_dev *dev) {}
 #endif /* CONFIG_MLX5_ESWITCH */
 
 #endif /* __MLX5_ESWITCH_H__ */
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index e95f10066eac..3033bbaeac81 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -813,6 +813,7 @@ struct mlx5_core_dev {
 	/* MACsec notifier chain to sync MACsec core and IB database */
 	struct blocking_notifier_head macsec_nh;
 #endif
+	u64 num_ipsec_offloads;
 };
 
 struct mlx5_db {
-- 
2.41.0

[PATCH net-next V4 7/8] net/mlx5: Implement devlink port function cmds to control ipsec_crypto

[Saeed Mahameed]

From: Dima Chumak <dchumak@nvidia.com>

Implement devlink port function commands to enable / disable IPsec
crypto offloads.  This is used to control the IPsec capability of the
device.

When ipsec_crypto is enabled for a VF, it prevents adding IPsec crypto
offloads on the PF, because the two cannot be active simultaneously due
to HW constraints. Conversely, if there are any active IPsec crypto
offloads on the PF, it's not allowed to enable ipsec_crypto on a VF,
until PF IPsec offloads are cleared.

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../ethernet/mellanox/mlx5/switchdev.rst      |  10 +
 .../net/ethernet/mellanox/mlx5/core/Makefile  |   2 +-
 .../mellanox/mlx5/core/esw/devlink_port.c     |   4 +
 .../ethernet/mellanox/mlx5/core/esw/ipsec.c   | 309 ++++++++++++++++++
 .../net/ethernet/mellanox/mlx5/core/eswitch.c |   8 +
 .../net/ethernet/mellanox/mlx5/core/eswitch.h |  14 +
 .../mellanox/mlx5/core/eswitch_offloads.c     |  85 +++++
 7 files changed, 431 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c

diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
index 6e3f5ee8b0d0..de51e55dcfe3 100644
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
+++ b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
@@ -190,6 +190,16 @@ explicitly enable the VF migratable capability.
 mlx5 driver support devlink port function attr mechanism to setup migratable
 capability. (refer to Documentation/networking/devlink/devlink-port.rst)
 
+IPsec crypto capability setup
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+User who wants mlx5 PCI VFs to be able to perform IPsec crypto offloading need
+to explicitly enable the VF ipsec_crypto capability. Enabling IPsec capability
+for VFs is supported starting with ConnectX6dx devices and above. When a VF has
+IPsec capability enabled, any IPsec offloading is blocked on the PF.
+
+mlx5 driver support devlink port function attr mechanism to setup ipsec_crypto
+capability. (refer to Documentation/networking/devlink/devlink-port.rst)
+
 SF state setup
 --------------
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
index b56b187a9097..7e94caca4888 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
@@ -69,7 +69,7 @@ mlx5_core-$(CONFIG_MLX5_TC_SAMPLE)   += en/tc/sample.o
 #
 mlx5_core-$(CONFIG_MLX5_ESWITCH)   += eswitch.o eswitch_offloads.o eswitch_offloads_termtbl.o \
 				      ecpf.o rdma.o esw/legacy.o \
-				      esw/devlink_port.o esw/vporttbl.o esw/qos.o
+				      esw/devlink_port.o esw/vporttbl.o esw/qos.o esw/ipsec.o
 
 mlx5_core-$(CONFIG_MLX5_ESWITCH)   += esw/acl/helper.o \
 				      esw/acl/egress_lgcy.o esw/acl/egress_ofld.o \
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
index 3c254a710006..12205e913417 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
@@ -92,6 +92,10 @@ static const struct devlink_port_ops mlx5_esw_pf_vf_dl_port_ops = {
 	.port_fn_roce_set = mlx5_devlink_port_fn_roce_set,
 	.port_fn_migratable_get = mlx5_devlink_port_fn_migratable_get,
 	.port_fn_migratable_set = mlx5_devlink_port_fn_migratable_set,
+#ifdef CONFIG_XFRM_OFFLOAD
+	.port_fn_ipsec_crypto_get = mlx5_devlink_port_fn_ipsec_crypto_get,
+	.port_fn_ipsec_crypto_set = mlx5_devlink_port_fn_ipsec_crypto_set,
+#endif /* CONFIG_XFRM_OFFLOAD */
 };
 
 static void mlx5_esw_offloads_sf_devlink_port_attrs_set(struct mlx5_eswitch *esw,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c
new file mode 100644
index 000000000000..187fb5f2d0cb
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c
@@ -0,0 +1,309 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+// Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+#include <linux/mlx5/device.h>
+#include <linux/mlx5/vport.h>
+#include "mlx5_core.h"
+#include "eswitch.h"
+
+static int esw_ipsec_vf_query_generic(struct mlx5_core_dev *dev, u16 vport_num, bool *result)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	void *hca_cap, *query_cap;
+	int err;
+
+	if (!MLX5_CAP_GEN(dev, vhca_resource_manager))
+		return -EOPNOTSUPP;
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(dev)) {
+		*result = false;
+		return 0;
+	}
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	if (!query_cap)
+		return -ENOMEM;
+
+	err = mlx5_vport_get_other_func_general_cap(dev, vport_num, query_cap);
+	if (err)
+		goto free;
+
+	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
+	*result = MLX5_GET(cmd_hca_cap, hca_cap, ipsec_offload);
+free:
+	kvfree(query_cap);
+	return err;
+}
+
+enum esw_vport_ipsec_offload {
+	MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD,
+};
+
+int mlx5_esw_ipsec_vf_offload_get(struct mlx5_core_dev *dev, struct mlx5_vport *vport)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	void *hca_cap, *query_cap;
+	bool ipsec_enabled;
+	int err;
+
+	/* Querying IPsec caps only makes sense when generic ipsec_offload
+	 * HCA cap is enabled
+	 */
+	err = esw_ipsec_vf_query_generic(dev, vport->vport, &ipsec_enabled);
+	if (err)
+		return err;
+
+	if (!ipsec_enabled) {
+		vport->info.ipsec_crypto_enabled = false;
+		return 0;
+	}
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	if (!query_cap)
+		return -ENOMEM;
+
+	err = mlx5_vport_get_other_func_cap(dev, vport->vport, query_cap, MLX5_CAP_IPSEC);
+	if (err)
+		goto free;
+
+	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
+	vport->info.ipsec_crypto_enabled =
+		MLX5_GET(ipsec_cap, hca_cap, ipsec_crypto_offload);
+free:
+	kvfree(query_cap);
+	return err;
+}
+
+static int esw_ipsec_vf_set_generic(struct mlx5_core_dev *dev, u16 vport_num, bool ipsec_ofld)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
+	void *hca_cap, *query_cap, *cap;
+	int ret;
+
+	if (!MLX5_CAP_GEN(dev, vhca_resource_manager))
+		return -EOPNOTSUPP;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	hca_cap = kvzalloc(set_sz, GFP_KERNEL);
+	if (!hca_cap || !query_cap) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	ret = mlx5_vport_get_other_func_general_cap(dev, vport_num, query_cap);
+	if (ret)
+		goto free;
+
+	cap = MLX5_ADDR_OF(set_hca_cap_in, hca_cap, capability);
+	memcpy(cap, MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability),
+	       MLX5_UN_SZ_BYTES(hca_cap_union));
+	MLX5_SET(cmd_hca_cap, cap, ipsec_offload, ipsec_ofld);
+
+	MLX5_SET(set_hca_cap_in, hca_cap, opcode, MLX5_CMD_OP_SET_HCA_CAP);
+	MLX5_SET(set_hca_cap_in, hca_cap, other_function, 1);
+	MLX5_SET(set_hca_cap_in, hca_cap, function_id, vport_num);
+
+	MLX5_SET(set_hca_cap_in, hca_cap, op_mod,
+		 MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1);
+	ret = mlx5_cmd_exec_in(dev, set_hca_cap, hca_cap);
+free:
+	kvfree(hca_cap);
+	kvfree(query_cap);
+	return ret;
+}
+
+static int esw_ipsec_vf_set_bytype(struct mlx5_core_dev *dev, struct mlx5_vport *vport,
+				   bool enable, enum esw_vport_ipsec_offload type)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
+	void *hca_cap, *query_cap, *cap;
+	int ret;
+
+	if (!MLX5_CAP_GEN(dev, vhca_resource_manager))
+		return -EOPNOTSUPP;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	hca_cap = kvzalloc(set_sz, GFP_KERNEL);
+	if (!hca_cap || !query_cap) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	ret = mlx5_vport_get_other_func_cap(dev, vport->vport, query_cap, MLX5_CAP_IPSEC);
+	if (ret)
+		goto free;
+
+	cap = MLX5_ADDR_OF(set_hca_cap_in, hca_cap, capability);
+	memcpy(cap, MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability),
+	       MLX5_UN_SZ_BYTES(hca_cap_union));
+
+	switch (type) {
+	case MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD:
+		MLX5_SET(ipsec_cap, cap, ipsec_crypto_offload, enable);
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+		goto free;
+	}
+
+	MLX5_SET(set_hca_cap_in, hca_cap, opcode, MLX5_CMD_OP_SET_HCA_CAP);
+	MLX5_SET(set_hca_cap_in, hca_cap, other_function, 1);
+	MLX5_SET(set_hca_cap_in, hca_cap, function_id, vport->vport);
+
+	MLX5_SET(set_hca_cap_in, hca_cap, op_mod,
+		 MLX5_SET_HCA_CAP_OP_MOD_IPSEC << 1);
+	ret = mlx5_cmd_exec_in(dev, set_hca_cap, hca_cap);
+free:
+	kvfree(hca_cap);
+	kvfree(query_cap);
+	return ret;
+}
+
+static int esw_ipsec_vf_crypto_aux_caps_set(struct mlx5_core_dev *dev, u16 vport_num, bool enable)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
+	void *hca_cap, *query_cap, *cap;
+	int ret;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	hca_cap = kvzalloc(set_sz, GFP_KERNEL);
+	if (!hca_cap || !query_cap) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	ret = mlx5_vport_get_other_func_cap(dev, vport_num, query_cap, MLX5_CAP_ETHERNET_OFFLOADS);
+	if (ret)
+		goto free;
+
+	cap = MLX5_ADDR_OF(set_hca_cap_in, hca_cap, capability);
+	memcpy(cap, MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability),
+	       MLX5_UN_SZ_BYTES(hca_cap_union));
+	MLX5_SET(per_protocol_networking_offload_caps, cap, insert_trailer, enable);
+	MLX5_SET(set_hca_cap_in, hca_cap, opcode, MLX5_CMD_OP_SET_HCA_CAP);
+	MLX5_SET(set_hca_cap_in, hca_cap, other_function, 1);
+	MLX5_SET(set_hca_cap_in, hca_cap, function_id, vport_num);
+	MLX5_SET(set_hca_cap_in, hca_cap, op_mod,
+		 MLX5_SET_HCA_CAP_OP_MOD_ETHERNET_OFFLOADS << 1);
+	ret = mlx5_cmd_exec_in(esw->dev, set_hca_cap, hca_cap);
+free:
+	kvfree(hca_cap);
+	kvfree(query_cap);
+	return ret;
+}
+
+static int esw_ipsec_vf_offload_set_bytype(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+					   bool enable, enum esw_vport_ipsec_offload type)
+{
+	struct mlx5_core_dev *dev = esw->dev;
+	int err;
+
+	if (vport->vport == MLX5_VPORT_PF)
+		return -EOPNOTSUPP;
+
+	if (type == MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD) {
+		err = esw_ipsec_vf_crypto_aux_caps_set(dev, vport->vport, enable);
+		if (err)
+			return err;
+	}
+
+	if (enable) {
+		err = esw_ipsec_vf_set_generic(dev, vport->vport, enable);
+		if (err)
+			return err;
+		err = esw_ipsec_vf_set_bytype(dev, vport, enable, type);
+		if (err)
+			return err;
+	} else {
+		err = esw_ipsec_vf_set_bytype(dev, vport, enable, type);
+		if (err)
+			return err;
+		err = esw_ipsec_vf_set_generic(dev, vport->vport, enable);
+		if (err)
+			return err;
+	}
+
+	switch (type) {
+	case MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD:
+		vport->info.ipsec_crypto_enabled = enable;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int esw_ipsec_offload_supported(struct mlx5_core_dev *dev, u16 vport_num)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	void *hca_cap, *query_cap;
+	int ret;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	if (!query_cap)
+		return -ENOMEM;
+
+	ret = mlx5_vport_get_other_func_cap(dev, vport_num, query_cap, MLX5_CAP_GENERAL);
+	if (ret)
+		goto free;
+
+	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
+	if (!MLX5_GET(cmd_hca_cap, hca_cap, log_max_dek))
+		ret = -EOPNOTSUPP;
+free:
+	kvfree(query_cap);
+	return ret;
+}
+
+bool mlx5_esw_ipsec_vf_offload_supported(struct mlx5_core_dev *dev)
+{
+	/* Old firmware doesn't support ipsec_offload capability for VFs. This
+	 * can be detected by checking reformat_add_esp_trasport capability -
+	 * when this cap isn't supported it means firmware cannot be trusted
+	 * about what it reports for ipsec_offload cap.
+	 */
+	return MLX5_CAP_FLOWTABLE_NIC_TX(dev, reformat_add_esp_trasport);
+}
+
+int mlx5_esw_ipsec_vf_crypto_offload_supported(struct mlx5_core_dev *dev,
+					       u16 vport_num)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	void *hca_cap, *query_cap;
+	int err;
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(dev))
+		return -EOPNOTSUPP;
+
+	err = esw_ipsec_offload_supported(dev, vport_num);
+	if (err)
+		return err;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	if (!query_cap)
+		return -ENOMEM;
+
+	err = mlx5_vport_get_other_func_cap(dev, vport_num, query_cap, MLX5_CAP_ETHERNET_OFFLOADS);
+	if (err)
+		goto free;
+
+	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
+	if (!MLX5_GET(per_protocol_networking_offload_caps, hca_cap, swp))
+		goto free;
+
+free:
+	kvfree(query_cap);
+	return err;
+}
+
+int mlx5_esw_ipsec_vf_crypto_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+					 bool enable)
+{
+	return esw_ipsec_vf_offload_set_bytype(esw, vport, enable,
+					       MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD);
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 38a149dd479f..79ae6ad94f55 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -832,6 +832,9 @@ static int mlx5_esw_vport_caps_get(struct mlx5_eswitch *esw, struct mlx5_vport *
 
 	hca_caps = MLX5_ADDR_OF(query_hca_cap_out, query_ctx, capability);
 	vport->info.mig_enabled = MLX5_GET(cmd_hca_cap_2, hca_caps, migratable);
+
+	err = mlx5_esw_ipsec_vf_offload_get(esw->dev, vport);
+
 out_free:
 	kfree(query_ctx);
 	return err;
@@ -914,6 +917,8 @@ int mlx5_esw_vport_enable(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
 	/* Sync with current vport context */
 	vport->enabled_events = enabled_events;
 	vport->enabled = true;
+	if (vport->vport != MLX5_VPORT_PF && vport->info.ipsec_crypto_enabled)
+		esw->enabled_ipsec_vf_count++;
 
 	/* Esw manager is trusted by default. Host PF (vport 0) is trusted as well
 	 * in smartNIC as it's a vport group manager.
@@ -970,6 +975,9 @@ void mlx5_esw_vport_disable(struct mlx5_eswitch *esw, struct mlx5_vport *vport)
 	    MLX5_CAP_GEN(esw->dev, vhca_resource_manager))
 		mlx5_esw_vport_vhca_id_clear(esw, vport_num);
 
+	if (vport->vport != MLX5_VPORT_PF && vport->info.ipsec_crypto_enabled)
+		esw->enabled_ipsec_vf_count--;
+
 	/* We don't assume VFs will cleanup after themselves.
 	 * Calling vport change handler while vport is disabled will cleanup
 	 * the vport resources.
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 0e51fd066fcc..cde5712aa697 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -163,6 +163,7 @@ struct mlx5_vport_info {
 	u8                      trusted: 1;
 	u8                      roce_enabled: 1;
 	u8                      mig_enabled: 1;
+	u8                      ipsec_crypto_enabled: 1;
 };
 
 /* Vport context events */
@@ -559,6 +560,12 @@ int mlx5_devlink_port_fn_migratable_get(struct devlink_port *port, bool *is_enab
 					struct netlink_ext_ack *extack);
 int mlx5_devlink_port_fn_migratable_set(struct devlink_port *port, bool enable,
 					struct netlink_ext_ack *extack);
+#ifdef CONFIG_XFRM_OFFLOAD
+int mlx5_devlink_port_fn_ipsec_crypto_get(struct devlink_port *port, bool *is_enabled,
+					  struct netlink_ext_ack *extack);
+int mlx5_devlink_port_fn_ipsec_crypto_set(struct devlink_port *port, bool enable,
+					  struct netlink_ext_ack *extack);
+#endif /* CONFIG_XFRM_OFFLOAD */
 void *mlx5_eswitch_get_uplink_priv(struct mlx5_eswitch *esw, u8 rep_type);
 
 int __mlx5_eswitch_set_vport_vlan(struct mlx5_eswitch *esw,
@@ -858,6 +865,13 @@ int mlx5_eswitch_restore_ipsec_rule(struct mlx5_eswitch *esw, struct mlx5_flow_h
 				    struct mlx5_esw_flow_attr *esw_attr, int attr_idx);
 bool mlx5_eswitch_block_ipsec(struct mlx5_core_dev *dev);
 void mlx5_eswitch_unblock_ipsec(struct mlx5_core_dev *dev);
+bool mlx5_esw_ipsec_vf_offload_supported(struct mlx5_core_dev *dev);
+int mlx5_esw_ipsec_vf_offload_get(struct mlx5_core_dev *dev,
+				  struct mlx5_vport *vport);
+int mlx5_esw_ipsec_vf_crypto_offload_supported(struct mlx5_core_dev *dev,
+					       u16 vport_num);
+int mlx5_esw_ipsec_vf_crypto_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+					 bool enable);
 #else  /* CONFIG_MLX5_ESWITCH */
 /* eswitch API stubs */
 static inline int  mlx5_eswitch_init(struct mlx5_core_dev *dev) { return 0; }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index d4697dadd27d..f37d30a096c0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -4367,3 +4367,88 @@ mlx5_eswitch_restore_ipsec_rule(struct mlx5_eswitch *esw, struct mlx5_flow_handl
 
 	return mlx5_modify_rule_destination(rule, &new_dest, &old_dest);
 }
+
+#ifdef CONFIG_XFRM_OFFLOAD
+int mlx5_devlink_port_fn_ipsec_crypto_get(struct devlink_port *port, bool *is_enabled,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	int err = 0;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(esw->dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "Device doesn't support IPSec crypto");
+		return -EOPNOTSUPP;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	*is_enabled = vport->info.ipsec_crypto_enabled;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
+
+int mlx5_devlink_port_fn_ipsec_crypto_set(struct devlink_port *port, bool enable,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	u16 vport_num;
+	int err;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	vport_num = mlx5_esw_devlink_port_index_to_vport_num(port->index);
+	err = mlx5_esw_ipsec_vf_crypto_offload_supported(esw->dev, vport_num);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Device doesn't support IPsec crypto");
+		return err;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		NL_SET_ERR_MSG_MOD(extack, "Eswitch vport is disabled");
+		goto unlock;
+	}
+
+	if (vport->info.ipsec_crypto_enabled == enable)
+		goto unlock;
+
+	if (!esw->enabled_ipsec_vf_count && esw->dev->num_ipsec_offloads) {
+		err = -EBUSY;
+		goto unlock;
+	}
+
+	err = mlx5_esw_ipsec_vf_crypto_offload_set(esw, vport, enable);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Failed to set IPsec crypto");
+		goto unlock;
+	}
+
+	vport->info.ipsec_crypto_enabled = enable;
+	if (enable)
+		esw->enabled_ipsec_vf_count++;
+	else
+		esw->enabled_ipsec_vf_count--;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
+#endif /* CONFIG_XFRM_OFFLOAD */
-- 
2.41.0

[PATCH net-next V4 8/8] net/mlx5: Implement devlink port function cmds to control ipsec_packet

[Saeed Mahameed]

From: Dima Chumak <dchumak@nvidia.com>

Implement devlink port function commands to enable / disable IPsec
packet offloads. This is used to control the IPsec capability of the
device.

When ipsec_offload is enabled for a VF, it prevents adding IPsec packet
offloads on the PF, because the two cannot be active simultaneously due
to HW constraints. Conversely, if there are any active IPsec packet
offloads on the PF, it's not allowed to enable ipsec_packet on a VF,
until PF IPsec offloads are cleared.

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../ethernet/mellanox/mlx5/switchdev.rst      | 10 +++
 .../mellanox/mlx5/core/esw/devlink_port.c     |  2 +
 .../ethernet/mellanox/mlx5/core/esw/ipsec.c   | 62 +++++++++++++-
 .../net/ethernet/mellanox/mlx5/core/eswitch.c |  7 +-
 .../net/ethernet/mellanox/mlx5/core/eswitch.h | 12 +++
 .../mellanox/mlx5/core/eswitch_offloads.c     | 84 +++++++++++++++++++
 6 files changed, 173 insertions(+), 4 deletions(-)

diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
index de51e55dcfe3..b617e93d7c2c 100644
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
+++ b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/switchdev.rst
@@ -200,6 +200,16 @@ IPsec capability enabled, any IPsec offloading is blocked on the PF.
 mlx5 driver support devlink port function attr mechanism to setup ipsec_crypto
 capability. (refer to Documentation/networking/devlink/devlink-port.rst)
 
+IPsec packet capability setup
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+User who wants mlx5 PCI VFs to be able to perform IPsec packet offloading need
+to explicitly enable the VF ipsec_packet capability. Enabling IPsec capability
+for VFs is supported starting with ConnectX6dx devices and above. When a VF has
+IPsec capability enabled, any IPsec offloading is blocked on the PF.
+
+mlx5 driver support devlink port function attr mechanism to setup ipsec_packet
+capability. (refer to Documentation/networking/devlink/devlink-port.rst)
+
 SF state setup
 --------------
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
index 12205e913417..d8e739cbcbce 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
@@ -95,6 +95,8 @@ static const struct devlink_port_ops mlx5_esw_pf_vf_dl_port_ops = {
 #ifdef CONFIG_XFRM_OFFLOAD
 	.port_fn_ipsec_crypto_get = mlx5_devlink_port_fn_ipsec_crypto_get,
 	.port_fn_ipsec_crypto_set = mlx5_devlink_port_fn_ipsec_crypto_set,
+	.port_fn_ipsec_packet_get = mlx5_devlink_port_fn_ipsec_packet_get,
+	.port_fn_ipsec_packet_set = mlx5_devlink_port_fn_ipsec_packet_set,
 #endif /* CONFIG_XFRM_OFFLOAD */
 };
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c
index 187fb5f2d0cb..da10e04777cf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec.c
@@ -37,6 +37,7 @@ static int esw_ipsec_vf_query_generic(struct mlx5_core_dev *dev, u16 vport_num,
 
 enum esw_vport_ipsec_offload {
 	MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD,
+	MLX5_ESW_VPORT_IPSEC_PACKET_OFFLOAD,
 };
 
 int mlx5_esw_ipsec_vf_offload_get(struct mlx5_core_dev *dev, struct mlx5_vport *vport)
@@ -55,6 +56,7 @@ int mlx5_esw_ipsec_vf_offload_get(struct mlx5_core_dev *dev, struct mlx5_vport *
 
 	if (!ipsec_enabled) {
 		vport->info.ipsec_crypto_enabled = false;
+		vport->info.ipsec_packet_enabled = false;
 		return 0;
 	}
 
@@ -69,6 +71,8 @@ int mlx5_esw_ipsec_vf_offload_get(struct mlx5_core_dev *dev, struct mlx5_vport *
 	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
 	vport->info.ipsec_crypto_enabled =
 		MLX5_GET(ipsec_cap, hca_cap, ipsec_crypto_offload);
+	vport->info.ipsec_packet_enabled =
+		MLX5_GET(ipsec_cap, hca_cap, ipsec_full_offload);
 free:
 	kvfree(query_cap);
 	return err;
@@ -143,6 +147,9 @@ static int esw_ipsec_vf_set_bytype(struct mlx5_core_dev *dev, struct mlx5_vport
 	case MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD:
 		MLX5_SET(ipsec_cap, cap, ipsec_crypto_offload, enable);
 		break;
+	case MLX5_ESW_VPORT_IPSEC_PACKET_OFFLOAD:
+		MLX5_SET(ipsec_cap, cap, ipsec_full_offload, enable);
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		goto free;
@@ -222,15 +229,28 @@ static int esw_ipsec_vf_offload_set_bytype(struct mlx5_eswitch *esw, struct mlx5
 		err = esw_ipsec_vf_set_bytype(dev, vport, enable, type);
 		if (err)
 			return err;
-		err = esw_ipsec_vf_set_generic(dev, vport->vport, enable);
+		err = mlx5_esw_ipsec_vf_offload_get(dev, vport);
 		if (err)
 			return err;
+
+		/* The generic ipsec_offload cap can be disabled only if both
+		 * ipsec_crypto_offload and ipsec_full_offload aren't enabled.
+		 */
+		if (!vport->info.ipsec_crypto_enabled &&
+		    !vport->info.ipsec_packet_enabled) {
+			err = esw_ipsec_vf_set_generic(dev, vport->vport, enable);
+			if (err)
+				return err;
+		}
 	}
 
 	switch (type) {
 	case MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD:
 		vport->info.ipsec_crypto_enabled = enable;
 		break;
+	case MLX5_ESW_VPORT_IPSEC_PACKET_OFFLOAD:
+		vport->info.ipsec_packet_enabled = enable;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -301,9 +321,49 @@ int mlx5_esw_ipsec_vf_crypto_offload_supported(struct mlx5_core_dev *dev,
 	return err;
 }
 
+int mlx5_esw_ipsec_vf_packet_offload_supported(struct mlx5_core_dev *dev,
+					       u16 vport_num)
+{
+	int query_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+	void *hca_cap, *query_cap;
+	int ret;
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(dev))
+		return -EOPNOTSUPP;
+
+	ret = esw_ipsec_offload_supported(dev, vport_num);
+	if (ret)
+		return ret;
+
+	query_cap = kvzalloc(query_sz, GFP_KERNEL);
+	if (!query_cap)
+		return -ENOMEM;
+
+	ret = mlx5_vport_get_other_func_cap(dev, vport_num, query_cap, MLX5_CAP_FLOW_TABLE);
+	if (ret)
+		goto out;
+
+	hca_cap = MLX5_ADDR_OF(query_hca_cap_out, query_cap, capability);
+	if (!MLX5_GET(flow_table_nic_cap, hca_cap, flow_table_properties_nic_receive.decap)) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+out:
+	kvfree(query_cap);
+	return ret;
+}
+
 int mlx5_esw_ipsec_vf_crypto_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
 					 bool enable)
 {
 	return esw_ipsec_vf_offload_set_bytype(esw, vport, enable,
 					       MLX5_ESW_VPORT_IPSEC_CRYPTO_OFFLOAD);
 }
+
+int mlx5_esw_ipsec_vf_packet_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+					 bool enable)
+{
+	return esw_ipsec_vf_offload_set_bytype(esw, vport, enable,
+					       MLX5_ESW_VPORT_IPSEC_PACKET_OFFLOAD);
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 79ae6ad94f55..6cd7d6497e10 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -834,7 +834,6 @@ static int mlx5_esw_vport_caps_get(struct mlx5_eswitch *esw, struct mlx5_vport *
 	vport->info.mig_enabled = MLX5_GET(cmd_hca_cap_2, hca_caps, migratable);
 
 	err = mlx5_esw_ipsec_vf_offload_get(esw->dev, vport);
-
 out_free:
 	kfree(query_ctx);
 	return err;
@@ -917,7 +916,8 @@ int mlx5_esw_vport_enable(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
 	/* Sync with current vport context */
 	vport->enabled_events = enabled_events;
 	vport->enabled = true;
-	if (vport->vport != MLX5_VPORT_PF && vport->info.ipsec_crypto_enabled)
+	if (vport->vport != MLX5_VPORT_PF &&
+	    (vport->info.ipsec_crypto_enabled || vport->info.ipsec_packet_enabled))
 		esw->enabled_ipsec_vf_count++;
 
 	/* Esw manager is trusted by default. Host PF (vport 0) is trusted as well
@@ -975,7 +975,8 @@ void mlx5_esw_vport_disable(struct mlx5_eswitch *esw, struct mlx5_vport *vport)
 	    MLX5_CAP_GEN(esw->dev, vhca_resource_manager))
 		mlx5_esw_vport_vhca_id_clear(esw, vport_num);
 
-	if (vport->vport != MLX5_VPORT_PF && vport->info.ipsec_crypto_enabled)
+	if (vport->vport != MLX5_VPORT_PF &&
+	    (vport->info.ipsec_crypto_enabled || vport->info.ipsec_packet_enabled))
 		esw->enabled_ipsec_vf_count--;
 
 	/* We don't assume VFs will cleanup after themselves.
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index cde5712aa697..37ab66e7b403 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -164,6 +164,7 @@ struct mlx5_vport_info {
 	u8                      roce_enabled: 1;
 	u8                      mig_enabled: 1;
 	u8                      ipsec_crypto_enabled: 1;
+	u8                      ipsec_packet_enabled: 1;
 };
 
 /* Vport context events */
@@ -565,6 +566,10 @@ int mlx5_devlink_port_fn_ipsec_crypto_get(struct devlink_port *port, bool *is_en
 					  struct netlink_ext_ack *extack);
 int mlx5_devlink_port_fn_ipsec_crypto_set(struct devlink_port *port, bool enable,
 					  struct netlink_ext_ack *extack);
+int mlx5_devlink_port_fn_ipsec_packet_get(struct devlink_port *port, bool *is_enabled,
+					  struct netlink_ext_ack *extack);
+int mlx5_devlink_port_fn_ipsec_packet_set(struct devlink_port *port, bool enable,
+					  struct netlink_ext_ack *extack);
 #endif /* CONFIG_XFRM_OFFLOAD */
 void *mlx5_eswitch_get_uplink_priv(struct mlx5_eswitch *esw, u8 rep_type);
 
@@ -872,6 +877,13 @@ int mlx5_esw_ipsec_vf_crypto_offload_supported(struct mlx5_core_dev *dev,
 					       u16 vport_num);
 int mlx5_esw_ipsec_vf_crypto_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
 					 bool enable);
+int mlx5_esw_ipsec_vf_packet_offload_set(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+					 bool enable);
+int mlx5_esw_ipsec_vf_packet_offload_supported(struct mlx5_core_dev *dev,
+					       u16 vport_num);
+void mlx5_esw_vport_ipsec_offload_enable(struct mlx5_eswitch *esw);
+void mlx5_esw_vport_ipsec_offload_disable(struct mlx5_eswitch *esw);
+
 #else  /* CONFIG_MLX5_ESWITCH */
 /* eswitch API stubs */
 static inline int  mlx5_eswitch_init(struct mlx5_core_dev *dev) { return 0; }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index f37d30a096c0..752fb0dfb111 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -4451,4 +4451,88 @@ int mlx5_devlink_port_fn_ipsec_crypto_set(struct devlink_port *port, bool enable
 	mutex_unlock(&esw->state_lock);
 	return err;
 }
+
+int mlx5_devlink_port_fn_ipsec_packet_get(struct devlink_port *port, bool *is_enabled,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	int err = 0;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(esw->dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "Device doesn't support IPsec packet");
+		return -EOPNOTSUPP;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	*is_enabled = vport->info.ipsec_packet_enabled;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
+
+int mlx5_devlink_port_fn_ipsec_packet_set(struct devlink_port *port,
+					  bool enable,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	u16 vport_num;
+	int err;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	vport_num = mlx5_esw_devlink_port_index_to_vport_num(port->index);
+	err = mlx5_esw_ipsec_vf_packet_offload_supported(esw->dev, vport_num);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Device doesn't support IPsec packet mode");
+		return err;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		NL_SET_ERR_MSG_MOD(extack, "Eswitch vport is disabled");
+		goto unlock;
+	}
+
+	if (vport->info.ipsec_packet_enabled == enable)
+		goto unlock;
+
+	if (!esw->enabled_ipsec_vf_count && esw->dev->num_ipsec_offloads) {
+		err = -EBUSY;
+		goto unlock;
+	}
+
+	err = mlx5_esw_ipsec_vf_packet_offload_set(esw, vport, enable);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Failed to set IPsec packet mode");
+		goto unlock;
+	}
+
+	vport->info.ipsec_packet_enabled = enable;
+	if (enable)
+		esw->enabled_ipsec_vf_count++;
+	else
+		esw->enabled_ipsec_vf_count--;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
 #endif /* CONFIG_XFRM_OFFLOAD */
-- 
2.41.0

Re: [PATCH net-next V4 1/8] devlink: Expose port function commands to control IPsec crypto offloads

[Jiri Pirko]

Fri, Aug 25, 2023 at 08:28:29AM CEST, saeed@kernel.org wrote:
>From: Dima Chumak <dchumak@nvidia.com>
>
>Expose port function commands to enable / disable IPsec crypto offloads,
>this is used to control the port IPsec capabilities.
>
>When IPsec crypto is disabled for a function of the port (default),
>function cannot offload any IPsec crypto operations (Encrypt/Decrypt and
>XFRM state offloading). When enabled, IPsec crypto operations can be
>offloaded by the function of the port.
>
>Example of a PCI VF port which supports IPsec crypto offloads:
>
>$ devlink port show pci/0000:06:00.0/1
>    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
>        function:
>        hw_addr 00:00:00:00:00:00 roce enable ipsec_crypto disable
>
>$ devlink port function set pci/0000:06:00.0/1 ipsec_crypto enable
>
>$ devlink port show pci/0000:06:00.0/1
>    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
>        function:
>        hw_addr 00:00:00:00:00:00 roce enable ipsec_crypto enable
>
>Signed-off-by: Dima Chumak <dchumak@nvidia.com>
>Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
>Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Reviewed-by: Jiri Pirko <jiri@nvidia.com>

Re: [PATCH net-next V4 2/8] devlink: Expose port function commands to control IPsec packet offloads

[Jiri Pirko]

Fri, Aug 25, 2023 at 08:28:30AM CEST, saeed@kernel.org wrote:
>From: Dima Chumak <dchumak@nvidia.com>
>
>Expose port function commands to enable / disable IPsec packet offloads,
>this is used to control the port IPsec capabilities.
>
>When IPsec packet is disabled for a function of the port (default),
>function cannot offload IPsec packet operations (encapsulation and XFRM
>policy offload). When enabled, IPsec packet operations can be offloaded
>by the function of the port, which includes crypto operation
>(Encrypt/Decrypt), IPsec encapsulation and XFRM state and policy
>offload.
>
>Example of a PCI VF port which supports IPsec packet offloads:
>
>$ devlink port show pci/0000:06:00.0/1
>    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
>        function:
>        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet disable
>
>$ devlink port function set pci/0000:06:00.0/1 ipsec_packet enable
>
>$ devlink port show pci/0000:06:00.0/1
>    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
>        function:
>        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet enable
>
>Signed-off-by: Dima Chumak <dchumak@nvidia.com>
>Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
>Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Reviewed-by: Jiri Pirko <jiri@nvidia.com>

Re: [PATCH net-next V4 0/8] {devlink,mlx5}: Add port function attributes for ipsec

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 24 Aug 2023 23:28:28 -0700 you wrote:
> From: Saeed Mahameed <saeedm@nvidia.com>
> 
> v4:
>  - Rebased on top of latest mlx5 changes, align with new code, fix build
>    warnings
> 
> v3:
>  - Changed newly introduced IPsec blocking routine
>    and as an outcome of testing already existing one.
>    I'm sending them together to avoid merge conflicts.
>  - Refactored patches to separate IFC part
>  - Simplified
> v2: https://lore.kernel.org/netdev/20230421104901.897946-1-dchumak@nvidia.com/
>  - Improve docs of ipsec_crypto vs ipsec_packet devlink attributes
>  - also see patches 2,4 for the changelog.
> 
> [...]

Here is the summary with links:
  - [net-next,V4,1/8] devlink: Expose port function commands to control IPsec crypto offloads
    https://git.kernel.org/netdev/net-next/c/62b6442c58dc
  - [net-next,V4,2/8] devlink: Expose port function commands to control IPsec packet offloads
    https://git.kernel.org/netdev/net-next/c/390a24cbc396
  - [net-next,V4,3/8] net/mlx5: Drop extra layer of locks in IPsec
    https://git.kernel.org/netdev/net-next/c/c46fb77383a6
  - [net-next,V4,4/8] net/mlx5e: Rewrite IPsec vs. TC block interface
    https://git.kernel.org/netdev/net-next/c/e25373416678
  - [net-next,V4,5/8] net/mlx5: Add IFC bits to support IPsec enable/disable
    https://git.kernel.org/netdev/net-next/c/17c8da5a3423
  - [net-next,V4,6/8] net/mlx5: Provide an interface to block change of IPsec capabilities
    https://git.kernel.org/netdev/net-next/c/8efd7b17a3b0
  - [net-next,V4,7/8] net/mlx5: Implement devlink port function cmds to control ipsec_crypto
    https://git.kernel.org/netdev/net-next/c/06bab69658a8
  - [net-next,V4,8/8] net/mlx5: Implement devlink port function cmds to control ipsec_packet
    https://git.kernel.org/netdev/net-next/c/b691b1116e82

You are awesome, thank you!
-- 
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