tls: remove tls_toe and the related driver

The tls_toe feature and its single user (chelsio chtls) have been
unmaintained for multiple years. It also hooks into the core of the
TCP implementation, and bypasses most of the networking stack.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/1f30e73275c07bf879f547589872d0916025a52e.1781165969.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 2 insertions, 81 deletions

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 93e4da7046a1..8eb6b8033606 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -79,7 +79,7 @@ enum {
 	NETIF_F_HW_TLS_RX_BIT,		/* Hardware TLS RX offload */
 
 	NETIF_F_GRO_HW_BIT,		/* Hardware Generic receive offload */
-	NETIF_F_HW_TLS_RECORD_BIT,	/* Offload TLS record */
+	__UNUSED_NETIF_F_56,
 	NETIF_F_GRO_FRAGLIST_BIT,	/* Fraglist GRO */
 
 	NETIF_F_HW_MACSEC_BIT,		/* Offload MACsec operations */
@@ -153,7 +153,6 @@ enum {
 #define NETIF_F_HW_ESP		__NETIF_F(HW_ESP)
 #define NETIF_F_HW_ESP_TX_CSUM	__NETIF_F(HW_ESP_TX_CSUM)
 #define	NETIF_F_RX_UDP_TUNNEL_PORT  __NETIF_F(RX_UDP_TUNNEL_PORT)
-#define NETIF_F_HW_TLS_RECORD	__NETIF_F(HW_TLS_RECORD)
 #define NETIF_F_GSO_UDP_L4	__NETIF_F(GSO_UDP_L4)
 #define NETIF_F_HW_TLS_TX	__NETIF_F(HW_TLS_TX)
 #define NETIF_F_HW_TLS_RX	__NETIF_F(HW_TLS_RX)
diff --git a/include/net/tls.h b/include/net/tls.h
index 3811943288b3..e57bef58851e 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -85,7 +85,6 @@ enum {
 	TLS_BASE,
 	TLS_SW,
 	TLS_HW,
-	TLS_HW_RECORD,
 	TLS_NUM_CONFIG,
 };
 
diff --git a/include/net/tls_toe.h b/include/net/tls_toe.h
deleted file mode 100644
index b3aa7593ce2c..000000000000
--- a/include/net/tls_toe.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * 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/kref.h>
-#include <linux/list.h>
-
-struct sock;
-
-#define TLS_TOE_DEVICE_NAME_MAX		32
-
-/*
- * This structure defines the routines for Inline TLS driver.
- * The following routines are optional and filled with a
- * null pointer if not defined.
- *
- * @name: Its the name of registered Inline tls device
- * @dev_list: Inline tls device list
- * int (*feature)(struct tls_toe_device *device);
- *     Called to return Inline TLS driver capability
- *
- * int (*hash)(struct tls_toe_device *device, struct sock *sk);
- *     This function sets Inline driver for listen and program
- *     device specific functioanlity as required
- *
- * void (*unhash)(struct tls_toe_device *device, struct sock *sk);
- *     This function cleans listen state set by Inline TLS driver
- *
- * void (*release)(struct kref *kref);
- *     Release the registered device and allocated resources
- * @kref: Number of reference to tls_toe_device
- */
-struct tls_toe_device {
-	char name[TLS_TOE_DEVICE_NAME_MAX];
-	struct list_head dev_list;
-	int  (*feature)(struct tls_toe_device *device);
-	int  (*hash)(struct tls_toe_device *device, struct sock *sk);
-	void (*unhash)(struct tls_toe_device *device, struct sock *sk);
-	void (*release)(struct kref *kref);
-	struct kref kref;
-};
-
-int tls_toe_bypass(struct sock *sk);
-int tls_toe_hash(struct sock *sk);
-void tls_toe_unhash(struct sock *sk);
-
-void tls_toe_register_device(struct tls_toe_device *device);
-void tls_toe_unregister_device(struct tls_toe_device *device);
diff --git a/include/uapi/linux/tls.h b/include/uapi/linux/tls.h
index b8b9c42f848c..1245ab38afc1 100644
--- a/include/uapi/linux/tls.h
+++ b/include/uapi/linux/tls.h
@@ -203,6 +203,6 @@ enum {
 #define TLS_CONF_BASE 1
 #define TLS_CONF_SW 2
 #define TLS_CONF_HW 3
-#define TLS_CONF_HW_RECORD 4
+#define TLS_CONF_HW_RECORD 4 /* unused */
 
 #endif /* _UAPI_LINUX_TLS_H */