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Message-ID: <20230421104901.897946-2-dchumak@nvidia.com>
Date: Fri, 21 Apr 2023 13:48:58 +0300
From: Dima Chumak <dchumak@...dia.com>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, Jiri Pirko <jiri@...nulli.us>,
Leon Romanovsky <leon@...nel.org>,
Saeed Mahameed <saeedm@...dia.com>,
Dima Chumak <dchumak@...dia.com>, Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next V2 1/4] devlink: Expose port function commands to control IPsec crypto offloads
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@...dia.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
---
.../networking/devlink/devlink-port.rst | 27 +++++++++
include/net/devlink.h | 21 +++++++
include/uapi/linux/devlink.h | 2 +
net/devlink/leftover.c | 55 +++++++++++++++++++
4 files changed, 105 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 6a942e70e451..4e5f4aeca29d 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1495,6 +1495,27 @@ struct devlink_ops {
int (*port_fn_migratable_set)(struct devlink_port *devlink_port,
bool enable,
struct netlink_ext_ack *extack);
+ /**
+ * @port_fn_ipsec_crypto_get: Port function's ipsec_crypto get function.
+ *
+ * Query ipsec_crypto state of a function managed by the devlink port.
+ * Return -EOPNOTSUPP if port function IPsec crypto offload is not
+ * supported.
+ */
+ int (*port_fn_ipsec_crypto_get)(struct devlink_port *devlink_port,
+ bool *is_enable,
+ struct netlink_ext_ack *extack);
+ /**
+ * @port_fn_ipsec_crypto_set: Port function's ipsec_crypto set function.
+ *
+ * Enable/Disable ipsec_crypto state of a function managed by the devlink
+ * port.
+ * Return -EOPNOTSUPP if port function IPsec crypto offload is not
+ * supported.
+ */
+ int (*port_fn_ipsec_crypto_set)(struct devlink_port *devlink_port,
+ bool enable,
+ struct netlink_ext_ack *extack);
/**
* port_new() - Add a new port function of a specified flavor
* @devlink: Devlink instance
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 dffca2f9bfa7..07761df2471d 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -492,6 +492,29 @@ static int devlink_port_fn_migratable_fill(const struct devlink_ops *ops,
return 0;
}
+static int devlink_port_fn_ipsec_crypto_fill(const struct devlink_ops *ops,
+ struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!ops->port_fn_ipsec_crypto_get ||
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+ return 0;
+
+ err = 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(const struct devlink_ops *ops,
struct devlink_port *devlink_port,
struct sk_buff *msg,
@@ -509,6 +532,10 @@ static int devlink_port_fn_caps_fill(const struct devlink_ops *ops,
if (err)
return err;
+ err = devlink_port_fn_ipsec_crypto_fill(ops, 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,
@@ -843,6 +870,15 @@ devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
return ops->port_fn_roce_set(devlink_port, enable, extack);
}
+static int
+devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+
+ return 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)
@@ -867,6 +903,13 @@ 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;
}
@@ -1235,6 +1278,18 @@ 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;
}
--
2.40.0
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