Initial import

1 files changed, 146 insertions, 0 deletions

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
new file mode 100644
index 000000000..c3a9c8fc6
--- /dev/null
+++ b/include/linux/can/dev.h
@@ -0,0 +1,146 @@
+/*
+ * linux/can/dev.h
+ *
+ * Definitions for the CAN network device driver interface
+ *
+ * Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
+ *               Varma Electronics Oy
+ *
+ * Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ */
+
+#ifndef _CAN_DEV_H
+#define _CAN_DEV_H
+
+#include <linux/can.h>
+#include <linux/can/netlink.h>
+#include <linux/can/error.h>
+#include <linux/can/led.h>
+
+/*
+ * CAN mode
+ */
+enum can_mode {
+	CAN_MODE_STOP = 0,
+	CAN_MODE_START,
+	CAN_MODE_SLEEP
+};
+
+/*
+ * CAN common private data
+ */
+struct can_priv {
+	struct can_device_stats can_stats;
+
+	struct can_bittiming bittiming, data_bittiming;
+	const struct can_bittiming_const *bittiming_const,
+		*data_bittiming_const;
+	struct can_clock clock;
+
+	enum can_state state;
+	u32 ctrlmode;
+	u32 ctrlmode_supported;
+
+	int restart_ms;
+	struct timer_list restart_timer;
+
+	int (*do_set_bittiming)(struct net_device *dev);
+	int (*do_set_data_bittiming)(struct net_device *dev);
+	int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
+	int (*do_get_state)(const struct net_device *dev,
+			    enum can_state *state);
+	int (*do_get_berr_counter)(const struct net_device *dev,
+				   struct can_berr_counter *bec);
+
+	unsigned int echo_skb_max;
+	struct sk_buff **echo_skb;
+
+#ifdef CONFIG_CAN_LEDS
+	struct led_trigger *tx_led_trig;
+	char tx_led_trig_name[CAN_LED_NAME_SZ];
+	struct led_trigger *rx_led_trig;
+	char rx_led_trig_name[CAN_LED_NAME_SZ];
+	struct led_trigger *rxtx_led_trig;
+	char rxtx_led_trig_name[CAN_LED_NAME_SZ];
+#endif
+};
+
+/*
+ * get_can_dlc(value) - helper macro to cast a given data length code (dlc)
+ * to __u8 and ensure the dlc value to be max. 8 bytes.
+ *
+ * To be used in the CAN netdriver receive path to ensure conformance with
+ * ISO 11898-1 Chapter 8.4.2.3 (DLC field)
+ */
+#define get_can_dlc(i)		(min_t(__u8, (i), CAN_MAX_DLC))
+#define get_canfd_dlc(i)	(min_t(__u8, (i), CANFD_MAX_DLC))
+
+/* Drop a given socketbuffer if it does not contain a valid CAN frame. */
+static inline int can_dropped_invalid_skb(struct net_device *dev,
+					  struct sk_buff *skb)
+{
+	const struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
+
+	if (skb->protocol == htons(ETH_P_CAN)) {
+		if (unlikely(skb->len != CAN_MTU ||
+			     cfd->len > CAN_MAX_DLEN))
+			goto inval_skb;
+	} else if (skb->protocol == htons(ETH_P_CANFD)) {
+		if (unlikely(skb->len != CANFD_MTU ||
+			     cfd->len > CANFD_MAX_DLEN))
+			goto inval_skb;
+	} else
+		goto inval_skb;
+
+	return 0;
+
+inval_skb:
+	kfree_skb(skb);
+	dev->stats.tx_dropped++;
+	return 1;
+}
+
+static inline bool can_is_canfd_skb(const struct sk_buff *skb)
+{
+	/* the CAN specific type of skb is identified by its data length */
+	return skb->len == CANFD_MTU;
+}
+
+/* get data length from can_dlc with sanitized can_dlc */
+u8 can_dlc2len(u8 can_dlc);
+
+/* map the sanitized data length to an appropriate data length code */
+u8 can_len2dlc(u8 len);
+
+struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
+void free_candev(struct net_device *dev);
+
+/* a candev safe wrapper around netdev_priv */
+struct can_priv *safe_candev_priv(struct net_device *dev);
+
+int open_candev(struct net_device *dev);
+void close_candev(struct net_device *dev);
+int can_change_mtu(struct net_device *dev, int new_mtu);
+
+int register_candev(struct net_device *dev);
+void unregister_candev(struct net_device *dev);
+
+int can_restart_now(struct net_device *dev);
+void can_bus_off(struct net_device *dev);
+
+void can_change_state(struct net_device *dev, struct can_frame *cf,
+		      enum can_state tx_state, enum can_state rx_state);
+
+void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
+		      unsigned int idx);
+unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx);
+void can_free_echo_skb(struct net_device *dev, unsigned int idx);
+
+struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
+struct sk_buff *alloc_canfd_skb(struct net_device *dev,
+				struct canfd_frame **cfd);
+struct sk_buff *alloc_can_err_skb(struct net_device *dev,
+				  struct can_frame **cf);
+
+#endif /* !_CAN_DEV_H */