Merge tag 'linux-can-next-for-5.4-20190904' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2019-09-04 j1939

this is a pull request for net-next/master consisting of 21 patches.

the first 12 patches are by me and target the CAN core infrastructure.
They clean up the names of variables , structs and struct members,
convert can_rx_register() to use max() instead of open coding it and
remove unneeded code from the can_pernet_exit() callback.

The next three patches are also by me and they introduce and make use of
the CAN midlayer private structure. It is used to hold protocol specific
per device data structures.

The next patch is by Oleksij Rempel, switches the
&net->can.rcvlists_lock from a spin_lock() to a spin_lock_bh(), so that
it can be used from NAPI (soft IRQ) context.

The next 4 patches are by Kurt Van Dijck, he first updates his email
address via mailmap and then extends sockaddr_can to include j1939
members.

The final patch is the collective effort of many entities (The j1939
authors: Oliver Hartkopp, Bastian Stender, Elenita Hinds, kbuild test
robot, Kurt Van Dijck, Maxime Jayat, Robin van der Gracht, Oleksij
Rempel, Marc Kleine-Budde). It adds support of SAE J1939 protocol to the
CAN networking stack.

SAE J1939 is the vehicle bus recommended practice used for communication
and diagnostics among vehicle components. Originating in the car and
heavy-duty truck industry in the United States, it is now widely used in
other parts of the world.

P.S.: This pull request doesn't invalidate my last pull request:
      "pull-request: can-next 2019-09-03".
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 118 insertions, 1 deletions

diff --git a/include/uapi/linux/can.h b/include/uapi/linux/can.h
index 0afb7d8e867f..1e988fdeba34 100644
--- a/include/uapi/linux/can.h
+++ b/include/uapi/linux/can.h
@@ -157,7 +157,8 @@ struct canfd_frame {
 #define CAN_TP20	4 /* VAG Transport Protocol v2.0 */
 #define CAN_MCNET	5 /* Bosch MCNet */
 #define CAN_ISOTP	6 /* ISO 15765-2 Transport Protocol */
-#define CAN_NPROTO	7
+#define CAN_J1939	7 /* SAE J1939 */
+#define CAN_NPROTO	8
 
 #define SOL_CAN_BASE 100
 
@@ -174,6 +175,23 @@ struct sockaddr_can {
 		/* transport protocol class address information (e.g. ISOTP) */
 		struct { canid_t rx_id, tx_id; } tp;
 
+		/* J1939 address information */
+		struct {
+			/* 8 byte name when using dynamic addressing */
+			__u64 name;
+
+			/* pgn:
+			 * 8 bit: PS in PDU2 case, else 0
+			 * 8 bit: PF
+			 * 1 bit: DP
+			 * 1 bit: reserved
+			 */
+			__u32 pgn;
+
+			/* 1 byte address */
+			__u8 addr;
+		} j1939;
+
 		/* reserved for future CAN protocols address information */
 	} can_addr;
 };
diff --git a/include/uapi/linux/can/j1939.h b/include/uapi/linux/can/j1939.h
new file mode 100644
index 000000000000..c32325342d30
--- /dev/null
+++ b/include/uapi/linux/can/j1939.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * j1939.h
+ *
+ * Copyright (c) 2010-2011 EIA Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _UAPI_CAN_J1939_H_
+#define _UAPI_CAN_J1939_H_
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/can.h>
+
+#define J1939_MAX_UNICAST_ADDR 0xfd
+#define J1939_IDLE_ADDR 0xfe
+#define J1939_NO_ADDR 0xff		/* == broadcast or no addr */
+#define J1939_NO_NAME 0
+#define J1939_PGN_REQUEST 0x0ea00		/* Request PG */
+#define J1939_PGN_ADDRESS_CLAIMED 0x0ee00	/* Address Claimed */
+#define J1939_PGN_ADDRESS_COMMANDED 0x0fed8	/* Commanded Address */
+#define J1939_PGN_PDU1_MAX 0x3ff00
+#define J1939_PGN_MAX 0x3ffff
+#define J1939_NO_PGN 0x40000
+
+/* J1939 Parameter Group Number
+ *
+ * bit 0-7	: PDU Specific (PS)
+ * bit 8-15	: PDU Format (PF)
+ * bit 16	: Data Page (DP)
+ * bit 17	: Reserved (R)
+ * bit 19-31	: set to zero
+ */
+typedef __u32 pgn_t;
+
+/* J1939 Priority
+ *
+ * bit 0-2	: Priority (P)
+ * bit 3-7	: set to zero
+ */
+typedef __u8 priority_t;
+
+/* J1939 NAME
+ *
+ * bit 0-20	: Identity Number
+ * bit 21-31	: Manufacturer Code
+ * bit 32-34	: ECU Instance
+ * bit 35-39	: Function Instance
+ * bit 40-47	: Function
+ * bit 48	: Reserved
+ * bit 49-55	: Vehicle System
+ * bit 56-59	: Vehicle System Instance
+ * bit 60-62	: Industry Group
+ * bit 63	: Arbitrary Address Capable
+ */
+typedef __u64 name_t;
+
+/* J1939 socket options */
+#define SOL_CAN_J1939 (SOL_CAN_BASE + CAN_J1939)
+enum {
+	SO_J1939_FILTER = 1,	/* set filters */
+	SO_J1939_PROMISC = 2,	/* set/clr promiscuous mode */
+	SO_J1939_SEND_PRIO = 3,
+	SO_J1939_ERRQUEUE = 4,
+};
+
+enum {
+	SCM_J1939_DEST_ADDR = 1,
+	SCM_J1939_DEST_NAME = 2,
+	SCM_J1939_PRIO = 3,
+	SCM_J1939_ERRQUEUE = 4,
+};
+
+enum {
+	J1939_NLA_PAD,
+	J1939_NLA_BYTES_ACKED,
+};
+
+enum {
+	J1939_EE_INFO_NONE,
+	J1939_EE_INFO_TX_ABORT,
+};
+
+struct j1939_filter {
+	name_t name;
+	name_t name_mask;
+	pgn_t pgn;
+	pgn_t pgn_mask;
+	__u8 addr;
+	__u8 addr_mask;
+};
+
+#define J1939_FILTER_MAX 512 /* maximum number of j1939_filter set via setsockopt() */
+
+#endif /* !_UAPI_CAN_J1939_H_ */