Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 211 insertions, 0 deletions

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
new file mode 100644
index 000000000..982ba245e
--- /dev/null
+++ b/include/linux/can/dev.h
@@ -0,0 +1,211 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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/bittiming.h>
+#include <linux/can/error.h>
+#include <linux/can/length.h>
+#include <linux/can/netlink.h>
+#include <linux/can/skb.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+
+/*
+ * CAN mode
+ */
+enum can_mode {
+	CAN_MODE_STOP = 0,
+	CAN_MODE_START,
+	CAN_MODE_SLEEP
+};
+
+enum can_termination_gpio {
+	CAN_TERMINATION_GPIO_DISABLED = 0,
+	CAN_TERMINATION_GPIO_ENABLED,
+	CAN_TERMINATION_GPIO_MAX,
+};
+
+/*
+ * CAN common private data
+ */
+struct can_priv {
+	struct net_device *dev;
+	struct can_device_stats can_stats;
+
+	const struct can_bittiming_const *bittiming_const,
+		*data_bittiming_const;
+	struct can_bittiming bittiming, data_bittiming;
+	const struct can_tdc_const *tdc_const;
+	struct can_tdc tdc;
+
+	unsigned int bitrate_const_cnt;
+	const u32 *bitrate_const;
+	const u32 *data_bitrate_const;
+	unsigned int data_bitrate_const_cnt;
+	u32 bitrate_max;
+	struct can_clock clock;
+
+	unsigned int termination_const_cnt;
+	const u16 *termination_const;
+	u16 termination;
+	struct gpio_desc *termination_gpio;
+	u16 termination_gpio_ohms[CAN_TERMINATION_GPIO_MAX];
+
+	unsigned int echo_skb_max;
+	struct sk_buff **echo_skb;
+
+	enum can_state state;
+
+	/* CAN controller features - see include/uapi/linux/can/netlink.h */
+	u32 ctrlmode;		/* current options setting */
+	u32 ctrlmode_supported;	/* options that can be modified by netlink */
+
+	int restart_ms;
+	struct delayed_work restart_work;
+
+	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_set_termination)(struct net_device *dev, u16 term);
+	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);
+	int (*do_get_auto_tdcv)(const struct net_device *dev, u32 *tdcv);
+};
+
+static inline bool can_tdc_is_enabled(const struct can_priv *priv)
+{
+	return !!(priv->ctrlmode & CAN_CTRLMODE_TDC_MASK);
+}
+
+/*
+ * can_get_relative_tdco() - TDCO relative to the sample point
+ *
+ * struct can_tdc::tdco represents the absolute offset from TDCV. Some
+ * controllers use instead an offset relative to the Sample Point (SP)
+ * such that:
+ *
+ * SSP = TDCV + absolute TDCO
+ *     = TDCV + SP + relative TDCO
+ *
+ * -+----------- one bit ----------+-- TX pin
+ *  |<--- Sample Point --->|
+ *
+ *                         --+----------- one bit ----------+-- RX pin
+ *  |<-------- TDCV -------->|
+ *                           |<------------------------>| absolute TDCO
+ *                           |<--- Sample Point --->|
+ *                           |                      |<->| relative TDCO
+ *  |<------------- Secondary Sample Point ------------>|
+ */
+static inline s32 can_get_relative_tdco(const struct can_priv *priv)
+{
+	const struct can_bittiming *dbt = &priv->data_bittiming;
+	s32 sample_point_in_tc = (CAN_SYNC_SEG + dbt->prop_seg +
+				  dbt->phase_seg1) * dbt->brp;
+
+	return (s32)priv->tdc.tdco - sample_point_in_tc;
+}
+
+/* helper to define static CAN controller features at device creation time */
+static inline int __must_check can_set_static_ctrlmode(struct net_device *dev,
+						       u32 static_mode)
+{
+	struct can_priv *priv = netdev_priv(dev);
+
+	/* alloc_candev() succeeded => netdev_priv() is valid at this point */
+	if (priv->ctrlmode_supported & static_mode) {
+		netdev_warn(dev,
+			    "Controller features can not be supported and static at the same time\n");
+		return -EINVAL;
+	}
+	priv->ctrlmode = static_mode;
+
+	/* override MTU which was set by default in can_setup()? */
+	if (static_mode & CAN_CTRLMODE_FD)
+		dev->mtu = CANFD_MTU;
+
+	return 0;
+}
+
+static inline u32 can_get_static_ctrlmode(struct can_priv *priv)
+{
+	return priv->ctrlmode & ~priv->ctrlmode_supported;
+}
+
+static inline bool can_is_canxl_dev_mtu(unsigned int mtu)
+{
+	return (mtu >= CANXL_MIN_MTU && mtu <= CANXL_MAX_MTU);
+}
+
+/* drop skb if it does not contain a valid CAN frame for sending */
+static inline bool can_dev_dropped_skb(struct net_device *dev, struct sk_buff *skb)
+{
+	struct can_priv *priv = netdev_priv(dev);
+
+	if (priv->ctrlmode & CAN_CTRLMODE_LISTENONLY) {
+		netdev_info_once(dev,
+				 "interface in listen only mode, dropping skb\n");
+		kfree_skb(skb);
+		dev->stats.tx_dropped++;
+		return true;
+	}
+
+	return can_dropped_invalid_skb(dev, skb);
+}
+
+void can_setup(struct net_device *dev);
+
+struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max,
+				    unsigned int txqs, unsigned int rxqs);
+#define alloc_candev(sizeof_priv, echo_skb_max) \
+	alloc_candev_mqs(sizeof_priv, echo_skb_max, 1, 1)
+#define alloc_candev_mq(sizeof_priv, echo_skb_max, count) \
+	alloc_candev_mqs(sizeof_priv, echo_skb_max, count, count)
+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 can_eth_ioctl_hwts(struct net_device *netdev, struct ifreq *ifr, int cmd);
+int can_ethtool_op_get_ts_info_hwts(struct net_device *dev,
+				    struct ethtool_ts_info *info);
+
+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);
+
+const char *can_get_state_str(const enum can_state state);
+void can_change_state(struct net_device *dev, struct can_frame *cf,
+		      enum can_state tx_state, enum can_state rx_state);
+
+#ifdef CONFIG_OF
+void of_can_transceiver(struct net_device *dev);
+#else
+static inline void of_can_transceiver(struct net_device *dev) { }
+#endif
+
+extern struct rtnl_link_ops can_link_ops;
+int can_netlink_register(void);
+void can_netlink_unregister(void);
+
+#endif /* !_CAN_DEV_H */