/**************************************************************************** * wireless/ieee802154/mac802154_internal.h * * Copyright (C) 2016 Sebastien Lorquet. All rights reserved. * Copyright (C) 2017 Verge Inc. All rights reserved. * Copyright (C) 2017 Gregory Nutt. All rights reserved. * * Author: Sebastien Lorquet * Author: Anthony Merlino * * The naming and comments for various fields are taken directly * from the IEEE 802.15.4 2011 standard. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef __WIRELESS_IEEE802154__MAC802154_INTERNAL_H #define __WIRELESS_IEEE802154__MAC802154_INTERNAL_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include "mac802154_notif.h" #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* If processing is not done at the interrupt level, then work queue support * is required. */ #if !defined(CONFIG_SCHED_WORKQUEUE) # error Work queue support is required in this configuration (CONFIG_SCHED_WORKQUEUE) #else /* Use the low priority work queue if possible */ # if defined(CONFIG_MAC802154_HPWORK) # define MAC802154_WORK HPWORK # elif defined(CONFIG_MAC802154_LPWORK) # define MAC802154_WORK LPWORK # else # error Neither CONFIG_MAC802154_HPWORK nor CONFIG_MAC802154_LPWORK defined # endif #endif #if !defined(CONFIG_MAC802154_NNOTIF) || CONFIG_MAC802154_NNOTIF <= 0 # undef CONFIG_MAC802154_NNOTIF # define CONFIG_MAC802154_NNOTIF 6 #endif #if !defined(CONFIG_MAC802154_NTXDESC) || CONFIG_MAC802154_NTXDESC <= 0 # undef CONFIG_MAC802154_NTXDESC # define CONFIG_MAC802154_NTXDESC 3 #endif #if CONFIG_MAC802154_NTXDESC > CONFIG_MAC802154_NNOTIF #error CONFIG_MAC802154_NNOTIF must be greater than CONFIG_MAC802154_NTXDESC #endif #if !defined(CONFIG_IEEE802154_DEFAULT_EADDR) #define CONFIG_IEEE802154_DEFAULT_EADDR 0xFFFFFFFFFFFFFFFF #endif /**************************************************************************** * Private Data ****************************************************************************/ /* Map between ieee802154_addrmode_e enum and actual address length */ static const uint8_t mac802154_addr_length[4] = {0, 0, 2, 8}; /**************************************************************************** * Private Types ****************************************************************************/ struct mac802154_radiocb_s { struct ieee802154_radiocb_s cb; FAR struct ieee802154_privmac_s *priv; }; /* Enumeration for representing what operation the MAC layer is currently doing. * There can only be one command being handled at any given time, but certain * operations such as association requires more than one command to be sent. * Therefore, the need to track not only what command is currently active, but * also, what overall operation the command is apart of is necessary. */ enum mac802154_operation_e { MAC802154_OP_NONE, MAC802154_OP_ASSOC, MAC802154_OP_POLL }; struct ieee802154_privmac_s; /* Forward Reference */ typedef void (*mac802154_worker_t)(FAR struct ieee802154_privmac_s *priv); /* The privmac structure holds the internal state of the MAC and is the * underlying represention of the opaque MACHANDLE. It contains storage for * the IEEE802.15.4 MIB attributes. */ struct ieee802154_privmac_s { FAR struct ieee802154_radio_s *radio; /* Contained IEEE802.15.4 radio dev */ FAR const struct mac802154_maccb_s *cb; /* Contained MAC callbacks */ FAR struct mac802154_radiocb_s radiocb; /* Interface to bind to radio */ sem_t exclsem; /* Support exclusive access */ /* Only support a single command at any given time. As of now I see no * condition where you need to have more than one command frame simultaneously */ sem_t op_sem; /* Exclusive operations */ enum mac802154_operation_e curr_op; /* The current overall operation */ enum ieee802154_cmdid_e curr_cmd; /* Type of the current cmd */ FAR struct ieee802154_txdesc_s *cmd_desc; /* TX descriptor for current cmd */ /* Pre-allocated notifications to be passed to the registered callback. These * need to be freed by the application using mac802154_xxxxnotif_free when * the callee layer is finished with it's use. */ FAR struct mac802154_notif_s *notif_free; struct mac802154_notif_s notif_pool[CONFIG_MAC802154_NNOTIF]; sem_t notif_sem; struct ieee802154_txdesc_s txdesc_pool[CONFIG_IEEE802154_NTXDESC]; sem_t txdesc_sem; sq_queue_t txdesc_queue; sq_queue_t txdone_queue; /* Support a singly linked list of transactions that will be sent using the * CSMA algorithm. On a non-beacon enabled PAN, these transactions will be * sent whenever. On a beacon-enabled PAN, these transactions will be sent * during the CAP of the Coordinator's superframe. */ sq_queue_t csma_queue; sq_queue_t gts_queue; /* Support a singly linked list of transactions that will be sent indirectly. * This list should only be used by a MAC acting as a coordinator. These * transactions will stay here until the data is extracted by the destination * device sending a Data Request MAC command or if too much time passes. This * list should also be used to populate the address list of the outgoing * beacon frame. */ sq_queue_t indirect_queue; /* Support a singly linked list of frames received */ sq_queue_t dataind_queue; /* Work structures for offloading aynchronous work */ struct work_s tx_work; struct work_s rx_work; struct work_s timeout_work; WDOG_ID timeout; /* Timeout watchdog */ mac802154_worker_t timeout_worker; struct work_s purge_work; /* MAC PIB attributes, grouped to save memory */ /* Holds all address information (Extended, Short, and PAN ID) for the MAC. */ struct ieee802154_addr_s addr; /* Holds all address information (Extended, Short) for Coordinator */ struct ieee802154_addr_s coordaddr; /* The maximum number of symbols to wait for an acknowledgement frame to * arrive following a transmitted data frame. [1] pg. 126 * * NOTE: This may be able to be a 16-bit or even an 8-bit number. I wasn't * sure at the time what the range of reasonable values was. */ uint32_t ack_waitdur; /* The maximum time to wait either for a frame intended as a response to a * data request frame or for a broadcast frame following a beacon with the * Frame Pending field set to one. [1] pg. 127 * * NOTE: This may be able to be a 16-bit or even an 8-bit number. I wasn't * sure at the time what the range of reasonable values was. */ uint32_t max_frame_waittime; /* The maximum time (in unit periods) that a transaction is stored by a * coordinator and indicated in its beacon. */ uint16_t trans_persisttime; /* Contents of beacon payload */ uint8_t beacon_payload[IEEE802154_MAX_BEACON_PAYLOAD_LEN]; uint8_t beacon_payload_len; /* Length of beacon payload */ uint8_t battlifeext_periods; /* # of backoff periods during which rx is * enabled after the IFS following beacon */ uint8_t bsn; /* Seq. num added to tx beacon frame */ uint8_t dsn; /* Seq. num added to tx data or MAC frame */ uint8_t maxretries; /* Max # of retries alloed after tx failure */ /* The maximum time, in multiples of aBaseSuperframeDuration, a device shall * wait for a response command frame to be available following a request * command frame. [1] 128. */ uint8_t resp_waittime; /* The total transmit duration (including PHY header and FCS) specified in * symbols. [1] pg. 129. */ uint32_t tx_totaldur; /* Start of 32-bit bitfield */ uint32_t trackingbeacon : 1; /* Are we tracking the beacon */ uint32_t isassoc : 1; /* Are we associated to the PAN */ uint32_t assocpermit : 1; /* Are we allowing assoc. as a coord. */ uint32_t autoreq : 1; /* Automatically send data req. if addr * addr is in the beacon frame */ uint32_t battlifeext : 1; /* Is BLE enabled */ uint32_t gtspermit : 1; /* Is PAN Coord. accepting GTS reqs. */ uint32_t promisc : 1; /* Is promiscuous mode on? */ uint32_t rngsupport : 1; /* Does MAC sublayer support ranging */ uint32_t sec_enabled : 1; /* Does MAC sublayer have security en. */ uint32_t timestamp_support : 1; /* Does MAC layer supports timestamping */ /* 2 available bits */ uint32_t beaconorder : 4; /* Freq. that beacon is transmitted */ uint32_t superframeorder : 4; /* Length of active portion of outgoing * superframe, including the beacon */ /* The offset, measured is symbols, between the symbol boundary at which the * MLME captures the timestamp of each transmitted and received frame, and * the onset of the first symbol past the SFD, namely the first symbol of * the frames [1] pg. 129. */ uint32_t sync_symboffset : 12; /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t beacon_txtime : 24; /* Time of last beacon transmit */ uint32_t minbe : 4; /* Min value of backoff exponent (BE) */ uint32_t maxbe : 4; /* Max value of backoff exponent (BE) */ /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t txctrl_activedur : 17; /* Duration for which tx is permitted to * be active */ uint32_t txctrl_pausedur : 1; /* Duration after tx before another tx is * permitted. 0=2000, 1= 10000 */ /* What type of device is this node acting as */ enum ieee802154_devmode_e devmode : 2; uint32_t max_csmabackoffs : 3; /* Max num backoffs for CSMA algorithm * before declaring ch access failure */ /* 9-bits remaining */ /* End of 32-bit bitfield. */ /* TODO: Add Security-related MAC PIB attributes */ }; /**************************************************************************** * Inline Functions ****************************************************************************/ #define mac802154_givesem(s) sem_post(s); static inline int mac802154_takesem(sem_t *sem, bool allowinterrupt) { int ret; do { /* Take a count from the semaphore, possibly waiting */ ret = sem_wait(sem); if (ret < 0) { /* EINTR is the only error that we expect */ DEBUGASSERT(get_errno() == EINTR); if (allowinterrupt) { return -EINTR; } } } while (ret != OK); return OK; } static inline void mac802154_txdesc_free(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc) { sq_addlast((FAR sq_entry_t *)txdesc, &priv->txdesc_queue); mac802154_givesem(&priv->txdesc_sem); } /**************************************************************************** * Name: mac802154_timercancel * * Description: * Cancel timer and remove reference to callback function * * Assumptions: * priv MAC struct is locked when calling. * ****************************************************************************/ static inline int mac802154_timercancel(FAR struct ieee802154_privmac_s *priv) { wd_cancel(priv->timeout); priv->timeout_worker = NULL; return OK; } /**************************************************************************** * Function Prototypes ****************************************************************************/ int mac802154_txdesc_alloc(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s **txdesc, bool allow_interrupt); int mac802154_timerstart(FAR struct ieee802154_privmac_s *priv, uint32_t numsymbols, mac802154_worker_t); void mac802154_setupindirect(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc); #endif /* __WIRELESS_IEEE802154__MAC802154_INTERNAL_H */