ieee802154: rename and move WPAN_NUM_ defines

This patch moves the 802.15.4 constraints WPAN_NUM_ defines into
"net/ieee802154.h" which should contain all necessary 802.15.4 related
information. Also rename these defines to a common name which is
IEEE802154_MAX_CHANNEL and IEEE802154_MAX_PAGE.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/linux/ieee802154.h

@@ -39,6 +39,9 @@
 #define IEEE802154_LIFS_PERIOD		40
 #define IEEE802154_SIFS_PERIOD		12
 
+#define IEEE802154_MAX_CHANNEL		26
+#define IEEE802154_MAX_PAGE		31
+
 #define IEEE802154_FC_TYPE_BEACON	0x0	/* Frame is beacon */
 #define	IEEE802154_FC_TYPE_DATA		0x1	/* Frame is data */
 #define IEEE802154_FC_TYPE_ACK		0x2	/* Frame is acknowledgment */

include/net/cfg802154.h

@@ -17,20 +17,13 @@
 #ifndef __NET_CFG802154_H
 #define __NET_CFG802154_H
 
+#include <linux/ieee802154.h>
 #include <linux/netdevice.h>
 #include <linux/mutex.h>
 #include <linux/bug.h>
 
 #include <net/nl802154.h>
 
-/* According to the IEEE 802.15.4 stadard the upper most significant bits of
- * the 32-bit channel bitmaps shall be used as an integer value to specify 32
- * possible channel pages. The lower 27 bits of the channel bit map shall be
- * used as a bit mask to specify channel numbers within a channel page.
- */
-#define WPAN_NUM_CHANNELS	27
-#define WPAN_NUM_PAGES		32
-
 struct wpan_phy;
 
 struct cfg802154_ops {
@@ -81,7 +74,7 @@ struct wpan_phy {
 	 */
 	u8 current_channel;
 	u8 current_page;
-	u32 channels_supported[32];
+	u32 channels_supported[IEEE802154_MAX_PAGE + 1];
 	s8 transmit_power;
 	u8 cca_mode;
 

net/ieee802154/nl802154.c

@@ -245,7 +245,7 @@ nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev,
 	if (!nl_page)
 		return -ENOBUFS;
 
-	for (page = 0; page < WPAN_NUM_PAGES; page++) {
+	for (page = 0; page <= IEEE802154_MAX_PAGE; page++) {
 		if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL,
 				rdev->wpan_phy.channels_supported[page]))
 			return -ENOBUFS;
@@ -616,7 +616,7 @@ static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
 	channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
 
 	/* check 802.15.4 constraints */
-	if (page >= WPAN_NUM_PAGES || channel >= WPAN_NUM_CHANNELS)
+	if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL)
 		return -EINVAL;
 
 	return rdev_set_channel(rdev, page, channel);