// SPDX-License-Identifier: ISC /* * Copyright (c) 2010 Broadcom Corporation */ #include <linux/types.h> #include <linux/module.h> #include <linux/if_ether.h> #include <linux/spinlock.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/err.h> #include <linux/jiffies.h> #include <net/cfg80211.h> #include <brcmu_utils.h> #include <brcmu_wifi.h> #include "core.h" #include "debug.h" #include "bus.h" #include "fwil.h" #include "fwil_types.h" #include "fweh.h" #include "fwsignal.h" #include "p2p.h" #include "cfg80211.h" #include "proto.h" #include "bcdc.h" #include "common.h" /** * DOC: Firmware Signalling * * Firmware can send signals to host and vice versa, which are passed in the * data packets using TLV based header. This signalling layer is on top of the * BDC bus protocol layer. */ /* * single definition for firmware-driver flow control tlv's. * * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length). * A length value 0 indicates variable length tlv. */ #define BRCMF_FWS_TLV_DEFLIST … /* * enum brcmf_fws_tlv_type - definition of tlv identifiers. */ #define BRCMF_FWS_TLV_DEF … enum brcmf_fws_tlv_type { … }; #undef BRCMF_FWS_TLV_DEF /* * enum brcmf_fws_tlv_len - definition of tlv lengths. */ #define BRCMF_FWS_TLV_DEF … enum brcmf_fws_tlv_len { … }; #undef BRCMF_FWS_TLV_DEF /* AMPDU rx reordering definitions */ #define BRCMF_RXREORDER_FLOWID_OFFSET … #define BRCMF_RXREORDER_MAXIDX_OFFSET … #define BRCMF_RXREORDER_FLAGS_OFFSET … #define BRCMF_RXREORDER_CURIDX_OFFSET … #define BRCMF_RXREORDER_EXPIDX_OFFSET … #define BRCMF_RXREORDER_DEL_FLOW … #define BRCMF_RXREORDER_FLUSH_ALL … #define BRCMF_RXREORDER_CURIDX_VALID … #define BRCMF_RXREORDER_EXPIDX_VALID … #define BRCMF_RXREORDER_NEW_HOLE … #ifdef DEBUG /* * brcmf_fws_tlv_names - array of tlv names. */ #define BRCMF_FWS_TLV_DEF … static struct { … } brcmf_fws_tlv_names[] = …; #undef BRCMF_FWS_TLV_DEF static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) { … } #else static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) { return "NODEBUG"; } #endif /* DEBUG */ /* * The PKTTAG tlv has additional bytes when firmware-signalling * mode has REUSESEQ flag set. */ #define BRCMF_FWS_TYPE_SEQ_LEN … /* * flags used to enable tlv signalling from firmware. */ #define BRCMF_FWS_FLAGS_RSSI_SIGNALS … #define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS … #define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS … #define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE … #define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE … #define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE … #define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE … #define BRCMF_FWS_MAC_DESC_TABLE_SIZE … #define BRCMF_FWS_MAC_DESC_ID_INVALID … #define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF … #define BRCMF_FWS_HOSTIF_FLOWSTATE_ON … #define BRCMF_FWS_FLOWCONTROL_HIWATER … #define BRCMF_FWS_FLOWCONTROL_LOWATER … #define BRCMF_FWS_PSQ_PREC_COUNT … #define BRCMF_FWS_PSQ_LEN … #define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST … #define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED … #define BRCMF_FWS_RET_OK_NOSCHEDULE … #define BRCMF_FWS_RET_OK_SCHEDULE … #define BRCMF_FWS_MODE_REUSESEQ_SHIFT … #define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) … #define BRCMF_FWS_MODE_GET_REUSESEQ(x) … /** * enum brcmf_fws_skb_state - indicates processing state of skb. * * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver. * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue. * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware. * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info. */ enum brcmf_fws_skb_state { … }; /** * struct brcmf_skbuff_cb - control buffer associated with skbuff. * * @bus_flags: 2 bytes reserved for bus specific parameters * @if_flags: holds interface index and packet related flags. * @htod: host to device packet identifier (used in PKTTAG tlv). * @htod_seq: this 16-bit is original seq number for every suppress packet. * @state: transmit state of the packet. * @mac: descriptor related to destination for this packet. * * This information is stored in control buffer struct sk_buff::cb, which * provides 48 bytes of storage so this structure should not exceed that. */ struct brcmf_skbuff_cb { … }; /* * macro casting skbuff control buffer to struct brcmf_skbuff_cb. */ #define brcmf_skbcb(skb) … /* * sk_buff control if flags * * b[11] - packet sent upon firmware request. * b[10] - packet only contains signalling data. * b[9] - packet is a tx packet. * b[8] - packet used requested credit * b[7] - interface in AP mode. * b[3:0] - interface index. */ #define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK … #define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT … #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK … #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT … #define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK … #define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT … #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK … #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT … #define BRCMF_SKB_IF_FLAGS_IF_AP_MASK … #define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT … #define BRCMF_SKB_IF_FLAGS_INDEX_MASK … #define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT … #define brcmf_skb_if_flags_set_field(skb, field, value) … #define brcmf_skb_if_flags_get_field(skb, field) … /* * sk_buff control packet identifier * * 32-bit packet identifier used in PKTTAG tlv from host to dongle. * * - Generated at the host (e.g. dhd) * - Seen as a generic sequence number by firmware except for the flags field. * * Generation : b[31] => generation number for this packet [host->fw] * OR, current generation number [fw->host] * Flags : b[30:27] => command, status flags * FIFO-AC : b[26:24] => AC-FIFO id * h-slot : b[23:8] => hanger-slot * freerun : b[7:0] => A free running counter */ #define BRCMF_SKB_HTOD_TAG_GENERATION_MASK … #define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT … #define BRCMF_SKB_HTOD_TAG_FLAGS_MASK … #define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT … #define BRCMF_SKB_HTOD_TAG_FIFO_MASK … #define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT … #define BRCMF_SKB_HTOD_TAG_HSLOT_MASK … #define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT … #define BRCMF_SKB_HTOD_TAG_FREERUN_MASK … #define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT … #define brcmf_skb_htod_tag_set_field(skb, field, value) … #define brcmf_skb_htod_tag_get_field(skb, field) … #define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK … #define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT … #define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK … #define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT … #define BRCMF_SKB_HTOD_SEQ_NR_MASK … #define BRCMF_SKB_HTOD_SEQ_NR_SHIFT … #define brcmf_skb_htod_seq_set_field(skb, field, value) … #define brcmf_skb_htod_seq_get_field(skb, field) … #define BRCMF_FWS_TXSTAT_GENERATION_MASK … #define BRCMF_FWS_TXSTAT_GENERATION_SHIFT … #define BRCMF_FWS_TXSTAT_FLAGS_MASK … #define BRCMF_FWS_TXSTAT_FLAGS_SHIFT … #define BRCMF_FWS_TXSTAT_FIFO_MASK … #define BRCMF_FWS_TXSTAT_FIFO_SHIFT … #define BRCMF_FWS_TXSTAT_HSLOT_MASK … #define BRCMF_FWS_TXSTAT_HSLOT_SHIFT … #define BRCMF_FWS_TXSTAT_FREERUN_MASK … #define BRCMF_FWS_TXSTAT_FREERUN_SHIFT … #define brcmf_txstatus_get_field(txs, field) … /* How long to defer borrowing in jiffies */ #define BRCMF_FWS_BORROW_DEFER_PERIOD … /** * enum brcmf_fws_txstatus - txstatus flag values. * * @BRCMF_FWS_TXSTATUS_DISCARD: * host is free to discard the packet. * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS: * 802.11 core suppressed the packet. * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS: * firmware suppress the packet as device is already in PS mode. * @BRCMF_FWS_TXSTATUS_FW_TOSSED: * firmware tossed the packet. * @BRCMF_FWS_TXSTATUS_FW_DISCARD_NOACK: * firmware tossed the packet after retries. * @BRCMF_FWS_TXSTATUS_FW_SUPPRESS_ACKED: * firmware wrongly reported suppressed previously, now fixing to acked. * @BRCMF_FWS_TXSTATUS_HOST_TOSSED: * host tossed the packet. */ enum brcmf_fws_txstatus { … }; enum brcmf_fws_fcmode { … }; enum brcmf_fws_mac_desc_state { … }; /** * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface * * @name: name of the descriptor. * @occupied: slot is in use. * @mac_handle: handle for mac entry determined by firmware. * @interface_id: interface index. * @state: current state. * @suppressed: mac entry is suppressed. * @generation: generation bit. * @ac_bitmap: ac queue bitmap. * @requested_credit: credits requested by firmware. * @requested_packet: packet requested by firmware. * @ea: ethernet address. * @seq: per-node free-running sequence. * @psq: power-save queue. * @transit_count: packet in transit to firmware. * @suppr_transit_count: suppressed packet in transit to firmware. * @send_tim_signal: if set tim signal will be sent. * @traffic_pending_bmp: traffic pending bitmap. * @traffic_lastreported_bmp: traffic last reported bitmap. */ struct brcmf_fws_mac_descriptor { … }; #define BRCMF_FWS_HANGER_MAXITEMS … #define BRCMF_BORROW_RATIO … /** * enum brcmf_fws_hanger_item_state - state of hanger item. * * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use. * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use. * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed. */ enum brcmf_fws_hanger_item_state { … }; /** * struct brcmf_fws_hanger_item - single entry for tx pending packet. * * @state: entry is either free or occupied. * @pkt: packet itself. */ struct brcmf_fws_hanger_item { … }; /** * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus. * * @pushed: packets pushed to await txstatus. * @popped: packets popped upon handling txstatus. * @failed_to_push: packets that could not be pushed. * @failed_to_pop: packets that could not be popped. * @failed_slotfind: packets for which failed to find an entry. * @slot_pos: last returned item index for a free entry. * @items: array of hanger items. */ struct brcmf_fws_hanger { … }; struct brcmf_fws_macdesc_table { … }; struct brcmf_fws_stats { … }; struct brcmf_fws_info { … }; #define BRCMF_FWS_TLV_DEF … /** * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. * * @fws: firmware-signalling information. * @id: identifier of the TLV. * * Return: the specified length for the given TLV; Otherwise -EINVAL. */ static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, enum brcmf_fws_tlv_type id) { … } #undef BRCMF_FWS_TLV_DEF static void brcmf_fws_lock(struct brcmf_fws_info *fws) __acquires(&fws->spinlock) { … } static void brcmf_fws_unlock(struct brcmf_fws_info *fws) __releases(&fws->spinlock) { … } static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) { … } static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) { … } static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) { … } static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, struct sk_buff *pkt, u32 slot_id) { … } static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, u32 slot_id, struct sk_buff **pktout, bool remove_item) { … } static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, int ifidx) { … } static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, u32 slot_id) { … } static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, bool (*fn)(struct sk_buff *, void *), int ifidx) { … } static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, struct brcmf_fws_mac_descriptor *desc) { … } static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc, u8 *addr, u8 ifidx) { … } static void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc) { … } static struct brcmf_fws_mac_descriptor * brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea) { … } static struct brcmf_fws_mac_descriptor* brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) { … } static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws, struct brcmf_fws_mac_descriptor *entry, int fifo) { … } static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws, struct brcmf_fws_mac_descriptor *entry, int ifidx) { … } static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, bool (*fn)(struct sk_buff *, void *), int ifidx) { … } static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) { … } static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) { … } static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, struct brcmf_fws_mac_descriptor *entry, int fifo, bool send_immediately) { … } static void brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, u8 if_id) { … } static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) { … } static int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) { … } static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) { … } static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) { … } static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) { … } static void brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, struct sk_buff *skb) { … } static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) { … } static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, u8 fifo, u8 credits) { … } static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) { … } static int brcmf_fws_enq(struct brcmf_fws_info *fws, enum brcmf_fws_skb_state state, int fifo, struct sk_buff *p) { … } static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) { … } static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, struct sk_buff *skb, u32 genbit, u16 seq) { … } static int brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, u32 genbit, u16 seq, u8 compcnt) { … } static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, u8 *data) { … } static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) { … } static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) { … } static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, const struct brcmf_event_msg *e, void *data) { … } static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, const struct brcmf_event_msg *e, void *data) { … } static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi, u8 start, u8 end, struct sk_buff_head *skb_list) { … } void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt) { … } void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb) { … } static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, struct sk_buff *p) { … } static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, struct sk_buff *skb, int fifo) { … } static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws, int highest_lender_ac, int borrower_ac, bool borrow_all) { … } static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, struct sk_buff *skb) { … } static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, int fifo) { … } int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) { … } void brcmf_fws_reset_interface(struct brcmf_if *ifp) { … } void brcmf_fws_add_interface(struct brcmf_if *ifp) { … } void brcmf_fws_del_interface(struct brcmf_if *ifp) { … } static void brcmf_fws_dequeue_worker(struct work_struct *worker) { … } #ifdef DEBUG static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data) { … } #else static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data) { return 0; } #endif struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr) { … } void brcmf_fws_detach(struct brcmf_fws_info *fws) { … } void brcmf_fws_debugfs_create(struct brcmf_pub *drvr) { … } bool brcmf_fws_queue_skbs(struct brcmf_fws_info *fws) { … } bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) { … } void brcmf_fws_bustxcomplete(struct brcmf_fws_info *fws, struct sk_buff *skb, bool success) { … } void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) { … }
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