Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 498 insertions, 0 deletions

diff --git a/include/net/mac802154.h b/include/net/mac802154.h
new file mode 100644
index 000000000..286824acd
--- /dev/null
+++ b/include/net/mac802154.h
@@ -0,0 +1,498 @@
+/*
+ * IEEE802.15.4-2003 specification
+ *
+ * Copyright (C) 2007-2012 Siemens AG
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef NET_MAC802154_H
+#define NET_MAC802154_H
+
+#include <asm/unaligned.h>
+#include <net/af_ieee802154.h>
+#include <linux/ieee802154.h>
+#include <linux/skbuff.h>
+
+#include <net/cfg802154.h>
+
+/**
+ * enum ieee802154_hw_addr_filt_flags - hardware address filtering flags
+ *
+ * The following flags are used to indicate changed address settings from
+ * the stack to the hardware.
+ *
+ * @IEEE802154_AFILT_SADDR_CHANGED: Indicates that the short address will be
+ *	change.
+ *
+ * @IEEE802154_AFILT_IEEEADDR_CHANGED: Indicates that the extended address
+ *	will be change.
+ *
+ * @IEEE802154_AFILT_PANID_CHANGED: Indicates that the pan id will be change.
+ *
+ * @IEEE802154_AFILT_PANC_CHANGED: Indicates that the address filter will
+ *	do frame address filtering as a pan coordinator.
+ */
+enum ieee802154_hw_addr_filt_flags {
+	IEEE802154_AFILT_SADDR_CHANGED		= BIT(0),
+	IEEE802154_AFILT_IEEEADDR_CHANGED	= BIT(1),
+	IEEE802154_AFILT_PANID_CHANGED		= BIT(2),
+	IEEE802154_AFILT_PANC_CHANGED		= BIT(3),
+};
+
+/**
+ * struct ieee802154_hw_addr_filt - hardware address filtering settings
+ *
+ * @pan_id: pan_id which should be set to the hardware address filter.
+ *
+ * @short_addr: short_addr which should be set to the hardware address filter.
+ *
+ * @ieee_addr: extended address which should be set to the hardware address
+ *	filter.
+ *
+ * @pan_coord: boolean if hardware filtering should be operate as coordinator.
+ */
+struct ieee802154_hw_addr_filt {
+	__le16	pan_id;
+	__le16	short_addr;
+	__le64	ieee_addr;
+	bool	pan_coord;
+};
+
+/**
+ * struct ieee802154_hw - ieee802154 hardware
+ *
+ * @extra_tx_headroom: headroom to reserve in each transmit skb for use by the
+ *	driver (e.g. for transmit headers.)
+ *
+ * @flags: hardware flags, see &enum ieee802154_hw_flags
+ *
+ * @parent: parent device of the hardware.
+ *
+ * @priv: pointer to private area that was allocated for driver use along with
+ *	this structure.
+ *
+ * @phy: This points to the &struct wpan_phy allocated for this 802.15.4 PHY.
+ */
+struct ieee802154_hw {
+	/* filled by the driver */
+	int	extra_tx_headroom;
+	u32	flags;
+	struct	device *parent;
+	void	*priv;
+
+	/* filled by mac802154 core */
+	struct	wpan_phy *phy;
+};
+
+/**
+ * enum ieee802154_hw_flags - hardware flags
+ *
+ * These flags are used to indicate hardware capabilities to
+ * the stack. Generally, flags here should have their meaning
+ * done in a way that the simplest hardware doesn't need setting
+ * any particular flags. There are some exceptions to this rule,
+ * however, so you are advised to review these flags carefully.
+ *
+ * @IEEE802154_HW_TX_OMIT_CKSUM: Indicates that xmitter will add FCS on it's
+ *	own.
+ *
+ * @IEEE802154_HW_LBT: Indicates that transceiver will support listen before
+ *	transmit.
+ *
+ * @IEEE802154_HW_CSMA_PARAMS: Indicates that transceiver will support csma
+ *	parameters (max_be, min_be, backoff exponents).
+ *
+ * @IEEE802154_HW_FRAME_RETRIES: Indicates that transceiver will support ARET
+ *	frame retries setting.
+ *
+ * @IEEE802154_HW_AFILT: Indicates that transceiver will support hardware
+ *	address filter setting.
+ *
+ * @IEEE802154_HW_PROMISCUOUS: Indicates that transceiver will support
+ *	promiscuous mode setting.
+ *
+ * @IEEE802154_HW_RX_OMIT_CKSUM: Indicates that receiver omits FCS.
+ *
+ * @IEEE802154_HW_RX_DROP_BAD_CKSUM: Indicates that receiver will not filter
+ *	frames with bad checksum.
+ */
+enum ieee802154_hw_flags {
+	IEEE802154_HW_TX_OMIT_CKSUM	= BIT(0),
+	IEEE802154_HW_LBT		= BIT(1),
+	IEEE802154_HW_CSMA_PARAMS	= BIT(2),
+	IEEE802154_HW_FRAME_RETRIES	= BIT(3),
+	IEEE802154_HW_AFILT		= BIT(4),
+	IEEE802154_HW_PROMISCUOUS	= BIT(5),
+	IEEE802154_HW_RX_OMIT_CKSUM	= BIT(6),
+	IEEE802154_HW_RX_DROP_BAD_CKSUM	= BIT(7),
+};
+
+/* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
+#define IEEE802154_HW_OMIT_CKSUM	(IEEE802154_HW_TX_OMIT_CKSUM | \
+					 IEEE802154_HW_RX_OMIT_CKSUM)
+
+/* struct ieee802154_ops - callbacks from mac802154 to the driver
+ *
+ * This structure contains various callbacks that the driver may
+ * handle or, in some cases, must handle, for example to transmit
+ * a frame.
+ *
+ * start: Handler that 802.15.4 module calls for device initialization.
+ *	  This function is called before the first interface is attached.
+ *
+ * stop:  Handler that 802.15.4 module calls for device cleanup.
+ *	  This function is called after the last interface is removed.
+ *
+ * xmit_sync:
+ *	  Handler that 802.15.4 module calls for each transmitted frame.
+ *	  skb cntains the buffer starting from the IEEE 802.15.4 header.
+ *	  The low-level driver should send the frame based on available
+ *	  configuration. This is called by a workqueue and useful for
+ *	  synchronous 802.15.4 drivers.
+ *	  This function should return zero or negative errno.
+ *
+ *	  WARNING:
+ *	  This will be deprecated soon. We don't accept synced xmit callbacks
+ *	  drivers anymore.
+ *
+ * xmit_async:
+ *	  Handler that 802.15.4 module calls for each transmitted frame.
+ *	  skb cntains the buffer starting from the IEEE 802.15.4 header.
+ *	  The low-level driver should send the frame based on available
+ *	  configuration.
+ *	  This function should return zero or negative errno.
+ *
+ * ed:    Handler that 802.15.4 module calls for Energy Detection.
+ *	  This function should place the value for detected energy
+ *	  (usually device-dependant) in the level pointer and return
+ *	  either zero or negative errno. Called with pib_lock held.
+ *
+ * set_channel:
+ * 	  Set radio for listening on specific channel.
+ *	  Set the device for listening on specified channel.
+ *	  Returns either zero, or negative errno. Called with pib_lock held.
+ *
+ * set_hw_addr_filt:
+ *	  Set radio for listening on specific address.
+ *	  Set the device for listening on specified address.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_txpower:
+ *	  Set radio transmit power in mBm. Called with pib_lock held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_lbt
+ *	  Enables or disables listen before talk on the device. Called with
+ *	  pib_lock held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_cca_mode
+ *	  Sets the CCA mode used by the device. Called with pib_lock held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_cca_ed_level
+ *	  Sets the CCA energy detection threshold in mBm. Called with pib_lock
+ *	  held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_csma_params
+ *	  Sets the CSMA parameter set for the PHY. Called with pib_lock held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_frame_retries
+ *	  Sets the retransmission attempt limit. Called with pib_lock held.
+ *	  Returns either zero, or negative errno.
+ *
+ * set_promiscuous_mode
+ *	  Enables or disable promiscuous mode.
+ */
+struct ieee802154_ops {
+	struct module	*owner;
+	int		(*start)(struct ieee802154_hw *hw);
+	void		(*stop)(struct ieee802154_hw *hw);
+	int		(*xmit_sync)(struct ieee802154_hw *hw,
+				     struct sk_buff *skb);
+	int		(*xmit_async)(struct ieee802154_hw *hw,
+				      struct sk_buff *skb);
+	int		(*ed)(struct ieee802154_hw *hw, u8 *level);
+	int		(*set_channel)(struct ieee802154_hw *hw, u8 page,
+				       u8 channel);
+	int		(*set_hw_addr_filt)(struct ieee802154_hw *hw,
+					    struct ieee802154_hw_addr_filt *filt,
+					    unsigned long changed);
+	int		(*set_txpower)(struct ieee802154_hw *hw, s32 mbm);
+	int		(*set_lbt)(struct ieee802154_hw *hw, bool on);
+	int		(*set_cca_mode)(struct ieee802154_hw *hw,
+					const struct wpan_phy_cca *cca);
+	int		(*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm);
+	int		(*set_csma_params)(struct ieee802154_hw *hw,
+					   u8 min_be, u8 max_be, u8 retries);
+	int		(*set_frame_retries)(struct ieee802154_hw *hw,
+					     s8 retries);
+	int             (*set_promiscuous_mode)(struct ieee802154_hw *hw,
+						const bool on);
+};
+
+/**
+ * ieee802154_get_fc_from_skb - get the frame control field from an skb
+ * @skb: skb where the frame control field will be get from
+ */
+static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
+{
+	__le16 fc;
+
+	/* check if we can fc at skb_mac_header of sk buffer */
+	if (WARN_ON(!skb_mac_header_was_set(skb) ||
+		    (skb_tail_pointer(skb) -
+		     skb_mac_header(skb)) < IEEE802154_FC_LEN))
+		return cpu_to_le16(0);
+
+	memcpy(&fc, skb_mac_header(skb), IEEE802154_FC_LEN);
+	return fc;
+}
+
+/**
+ * ieee802154_skb_dst_pan - get the pointer to destination pan field
+ * @fc: mac header frame control field
+ * @skb: skb where the destination pan pointer will be get from
+ */
+static inline unsigned char *ieee802154_skb_dst_pan(__le16 fc,
+						    const struct sk_buff *skb)
+{
+	unsigned char *dst_pan;
+
+	switch (ieee802154_daddr_mode(fc)) {
+	case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
+		dst_pan = NULL;
+		break;
+	case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
+	case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
+		dst_pan = skb_mac_header(skb) +
+			  IEEE802154_FC_LEN +
+			  IEEE802154_SEQ_LEN;
+		break;
+	default:
+		WARN_ONCE(1, "invalid addr mode detected");
+		dst_pan = NULL;
+		break;
+	}
+
+	return dst_pan;
+}
+
+/**
+ * ieee802154_skb_src_pan - get the pointer to source pan field
+ * @fc: mac header frame control field
+ * @skb: skb where the source pan pointer will be get from
+ */
+static inline unsigned char *ieee802154_skb_src_pan(__le16 fc,
+						    const struct sk_buff *skb)
+{
+	unsigned char *src_pan;
+
+	switch (ieee802154_saddr_mode(fc)) {
+	case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
+		src_pan = NULL;
+		break;
+	case cpu_to_le16(IEEE802154_FCTL_SADDR_SHORT):
+	case cpu_to_le16(IEEE802154_FCTL_SADDR_EXTENDED):
+		/* if intra-pan and source addr mode is non none,
+		 * then source pan id is equal destination pan id.
+		 */
+		if (ieee802154_is_intra_pan(fc)) {
+			src_pan = ieee802154_skb_dst_pan(fc, skb);
+			break;
+		}
+
+		switch (ieee802154_daddr_mode(fc)) {
+		case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
+			src_pan = skb_mac_header(skb) +
+				  IEEE802154_FC_LEN +
+				  IEEE802154_SEQ_LEN;
+			break;
+		case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
+			src_pan = skb_mac_header(skb) +
+				  IEEE802154_FC_LEN +
+				  IEEE802154_SEQ_LEN +
+				  IEEE802154_PAN_ID_LEN +
+				  IEEE802154_SHORT_ADDR_LEN;
+			break;
+		case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
+			src_pan = skb_mac_header(skb) +
+				  IEEE802154_FC_LEN +
+				  IEEE802154_SEQ_LEN +
+				  IEEE802154_PAN_ID_LEN +
+				  IEEE802154_EXTENDED_ADDR_LEN;
+			break;
+		default:
+			WARN_ONCE(1, "invalid addr mode detected");
+			src_pan = NULL;
+			break;
+		}
+		break;
+	default:
+		WARN_ONCE(1, "invalid addr mode detected");
+		src_pan = NULL;
+		break;
+	}
+
+	return src_pan;
+}
+
+/**
+ * ieee802154_skb_is_intra_pan_addressing - checks whenever the mac addressing
+ *	is an intra pan communication
+ * @fc: mac header frame control field
+ * @skb: skb where the source and destination pan should be get from
+ */
+static inline bool ieee802154_skb_is_intra_pan_addressing(__le16 fc,
+							  const struct sk_buff *skb)
+{
+	unsigned char *dst_pan = ieee802154_skb_dst_pan(fc, skb),
+		      *src_pan = ieee802154_skb_src_pan(fc, skb);
+
+	/* if one is NULL is no intra pan addressing */
+	if (!dst_pan || !src_pan)
+		return false;
+
+	return !memcmp(dst_pan, src_pan, IEEE802154_PAN_ID_LEN);
+}
+
+/**
+ * ieee802154_be64_to_le64 - copies and convert be64 to le64
+ * @le64_dst: le64 destination pointer
+ * @be64_src: be64 source pointer
+ */
+static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src)
+{
+	put_unaligned_le64(get_unaligned_be64(be64_src), le64_dst);
+}
+
+/**
+ * ieee802154_le64_to_be64 - copies and convert le64 to be64
+ * @be64_dst: be64 destination pointer
+ * @le64_src: le64 source pointer
+ */
+static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src)
+{
+	put_unaligned_be64(get_unaligned_le64(le64_src), be64_dst);
+}
+
+/**
+ * ieee802154_le16_to_be16 - copies and convert le16 to be16
+ * @be16_dst: be16 destination pointer
+ * @le16_src: le16 source pointer
+ */
+static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src)
+{
+	put_unaligned_be16(get_unaligned_le16(le16_src), be16_dst);
+}
+
+/**
+ * ieee802154_be16_to_le16 - copies and convert be16 to le16
+ * @le16_dst: le16 destination pointer
+ * @be16_src: be16 source pointer
+ */
+static inline void ieee802154_be16_to_le16(void *le16_dst, const void *be16_src)
+{
+	put_unaligned_le16(get_unaligned_be16(be16_src), le16_dst);
+}
+
+/**
+ * ieee802154_alloc_hw - Allocate a new hardware device
+ *
+ * This must be called once for each hardware device. The returned pointer
+ * must be used to refer to this device when calling other functions.
+ * mac802154 allocates a private data area for the driver pointed to by
+ * @priv in &struct ieee802154_hw, the size of this area is given as
+ * @priv_data_len.
+ *
+ * @priv_data_len: length of private data
+ * @ops: callbacks for this device
+ *
+ * Return: A pointer to the new hardware device, or %NULL on error.
+ */
+struct ieee802154_hw *
+ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
+
+/**
+ * ieee802154_free_hw - free hardware descriptor
+ *
+ * This function frees everything that was allocated, including the
+ * private data for the driver. You must call ieee802154_unregister_hw()
+ * before calling this function.
+ *
+ * @hw: the hardware to free
+ */
+void ieee802154_free_hw(struct ieee802154_hw *hw);
+
+/**
+ * ieee802154_register_hw - Register hardware device
+ *
+ * You must call this function before any other functions in
+ * mac802154. Note that before a hardware can be registered, you
+ * need to fill the contained wpan_phy's information.
+ *
+ * @hw: the device to register as returned by ieee802154_alloc_hw()
+ *
+ * Return: 0 on success. An error code otherwise.
+ */
+int ieee802154_register_hw(struct ieee802154_hw *hw);
+
+/**
+ * ieee802154_unregister_hw - Unregister a hardware device
+ *
+ * This function instructs mac802154 to free allocated resources
+ * and unregister netdevices from the networking subsystem.
+ *
+ * @hw: the hardware to unregister
+ */
+void ieee802154_unregister_hw(struct ieee802154_hw *hw);
+
+/**
+ * ieee802154_rx_irqsafe - receive frame
+ *
+ * Like ieee802154_rx() but can be called in IRQ context
+ * (internally defers to a tasklet.)
+ *
+ * @hw: the hardware this frame came in on
+ * @skb: the buffer to receive, owned by mac802154 after this call
+ * @lqi: link quality indicator
+ */
+void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
+			   u8 lqi);
+/**
+ * ieee802154_wake_queue - wake ieee802154 queue
+ * @hw: pointer as obtained from ieee802154_alloc_hw().
+ *
+ * Drivers should use this function instead of netif_wake_queue.
+ */
+void ieee802154_wake_queue(struct ieee802154_hw *hw);
+
+/**
+ * ieee802154_stop_queue - stop ieee802154 queue
+ * @hw: pointer as obtained from ieee802154_alloc_hw().
+ *
+ * Drivers should use this function instead of netif_stop_queue.
+ */
+void ieee802154_stop_queue(struct ieee802154_hw *hw);
+
+/**
+ * ieee802154_xmit_complete - frame transmission complete
+ *
+ * @hw: pointer as obtained from ieee802154_alloc_hw().
+ * @skb: buffer for transmission
+ * @ifs_handling: indicate interframe space handling
+ */
+void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
+			      bool ifs_handling);
+
+#endif /* NET_MAC802154_H */