net/tls: move TOE-related code to a separate file

Move tls_hw_* functions to a new, separate source file
to avoid confusion with normal, non-TOE offload.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 139 insertions, 0 deletions

diff --git a/net/tls/tls_toe.c b/net/tls/tls_toe.c
new file mode 100644
index 000000000000..89a7014a05f7
--- /dev/null
+++ b/net/tls/tls_toe.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/spinlock.h>
+#include <net/inet_connection_sock.h>
+#include <net/tls.h>
+#include <net/tls_toe.h>
+
+static LIST_HEAD(device_list);
+static DEFINE_SPINLOCK(device_spinlock);
+
+static void tls_hw_sk_destruct(struct sock *sk)
+{
+	struct inet_connection_sock *icsk = inet_csk(sk);
+	struct tls_context *ctx = tls_get_ctx(sk);
+
+	ctx->sk_destruct(sk);
+	/* Free ctx */
+	rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
+	tls_ctx_free(sk, ctx);
+}
+
+int tls_hw_prot(struct sock *sk)
+{
+	struct tls_toe_device *dev;
+	struct tls_context *ctx;
+	int rc = 0;
+
+	spin_lock_bh(&device_spinlock);
+	list_for_each_entry(dev, &device_list, dev_list) {
+		if (dev->feature && dev->feature(dev)) {
+			ctx = tls_ctx_create(sk);
+			if (!ctx)
+				goto out;
+
+			ctx->sk_destruct = sk->sk_destruct;
+			sk->sk_destruct = tls_hw_sk_destruct;
+			ctx->rx_conf = TLS_HW_RECORD;
+			ctx->tx_conf = TLS_HW_RECORD;
+			update_sk_prot(sk, ctx);
+			rc = 1;
+			break;
+		}
+	}
+out:
+	spin_unlock_bh(&device_spinlock);
+	return rc;
+}
+
+void tls_hw_unhash(struct sock *sk)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	struct tls_toe_device *dev;
+
+	spin_lock_bh(&device_spinlock);
+	list_for_each_entry(dev, &device_list, dev_list) {
+		if (dev->unhash) {
+			kref_get(&dev->kref);
+			spin_unlock_bh(&device_spinlock);
+			dev->unhash(dev, sk);
+			kref_put(&dev->kref, dev->release);
+			spin_lock_bh(&device_spinlock);
+		}
+	}
+	spin_unlock_bh(&device_spinlock);
+	ctx->sk_proto->unhash(sk);
+}
+
+int tls_hw_hash(struct sock *sk)
+{
+	struct tls_context *ctx = tls_get_ctx(sk);
+	struct tls_toe_device *dev;
+	int err;
+
+	err = ctx->sk_proto->hash(sk);
+	spin_lock_bh(&device_spinlock);
+	list_for_each_entry(dev, &device_list, dev_list) {
+		if (dev->hash) {
+			kref_get(&dev->kref);
+			spin_unlock_bh(&device_spinlock);
+			err |= dev->hash(dev, sk);
+			kref_put(&dev->kref, dev->release);
+			spin_lock_bh(&device_spinlock);
+		}
+	}
+	spin_unlock_bh(&device_spinlock);
+
+	if (err)
+		tls_hw_unhash(sk);
+	return err;
+}
+
+void tls_toe_register_device(struct tls_toe_device *device)
+{
+	spin_lock_bh(&device_spinlock);
+	list_add_tail(&device->dev_list, &device_list);
+	spin_unlock_bh(&device_spinlock);
+}
+EXPORT_SYMBOL(tls_toe_register_device);
+
+void tls_toe_unregister_device(struct tls_toe_device *device)
+{
+	spin_lock_bh(&device_spinlock);
+	list_del(&device->dev_list);
+	spin_unlock_bh(&device_spinlock);
+}
+EXPORT_SYMBOL(tls_toe_unregister_device);