From: Michael Nemanov <Michael.Nemanov@xxxxxx> Unlike in wlcore, events are queued on linked list (cc->event_list) and are handled outside the IRQ context. This will be more clear when looking at main.c --- drivers/net/wireless/ti/cc33xx/event.c | 385 +++++++++++++++++++++++++ drivers/net/wireless/ti/cc33xx/event.h | 71 +++++ 2 files changed, 456 insertions(+) create mode 100644 drivers/net/wireless/ti/cc33xx/event.c create mode 100644 drivers/net/wireless/ti/cc33xx/event.h diff --git a/drivers/net/wireless/ti/cc33xx/event.c b/drivers/net/wireless/ti/cc33xx/event.c new file mode 100644 index 000000000000..76cd8d57897a --- /dev/null +++ b/drivers/net/wireless/ti/cc33xx/event.c @@ -0,0 +1,385 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/ + */ + +#include "acx.h" +#include "event.h" +#include "ps.h" +#include "io.h" +#include "scan.h" + +#define CC33XX_WAIT_EVENT_FAST_POLL_COUNT 20 + +struct cc33xx_event_mailbox { + __le32 events_vector; + + u8 number_of_scan_results; + u8 number_of_sched_scan_results; + + __le16 channel_switch_role_id_bitmap; + + s8 rssi_snr_trigger_metric[NUM_OF_RSSI_SNR_TRIGGERS]; + + /* bitmap of removed links */ + __le32 hlid_removed_bitmap; + + /* rx ba constraint */ + __le16 rx_ba_role_id_bitmap; /* 0xfff means any role. */ + __le16 rx_ba_allowed_bitmap; + + /* bitmap of roc completed (by role id) */ + __le16 roc_completed_bitmap; + + /* bitmap of stations (by role id) with bss loss */ + __le16 bss_loss_bitmap; + + /* bitmap of stations (by HLID) which exceeded max tx retries */ + __le16 tx_retry_exceeded_bitmap; + + /* time sync high msb*/ + __le16 time_sync_tsf_high_msb; + + /* bitmap of inactive stations (by HLID) */ + __le16 inactive_sta_bitmap; + + /* time sync high lsb*/ + __le16 time_sync_tsf_high_lsb; + + /* rx BA win size indicated by RX_BA_WIN_SIZE_CHANGE_EVENT_ID */ + u8 rx_ba_role_id; + u8 rx_ba_link_id; + u8 rx_ba_win_size; + u8 padding; + + /* smart config */ + u8 sc_ssid_len; + u8 sc_pwd_len; + u8 sc_token_len; + u8 padding1; + u8 sc_ssid[32]; + u8 sc_pwd[64]; + u8 sc_token[32]; + + /* smart config sync channel */ + u8 sc_sync_channel; + u8 sc_sync_band; + + /* time sync low msb*/ + __le16 time_sync_tsf_low_msb; + + /* radar detect */ + u8 radar_channel; + u8 radar_type; + + /* time sync low lsb*/ + __le16 time_sync_tsf_low_lsb; + + u8 ble_event[260]; + +} __packed; + +struct event_node { + struct llist_node node; + struct cc33xx_event_mailbox event_data; +}; + +void deffer_event(struct cc33xx *cc, + const void *event_payload, size_t event_length) +{ + struct event_node *event_node; + bool ret; + + if (WARN_ON(event_length != sizeof(event_node->event_data))) + return; + + event_node = kzalloc(sizeof(*event_node), GFP_KERNEL); + if (WARN_ON(!event_node)) + return; + + memcpy(&event_node->event_data, + event_payload, sizeof(event_node->event_data)); + + llist_add(&event_node->node, &cc->event_list); + ret = queue_work(cc->freezable_wq, &cc->irq_deferred_work); + + cc33xx_debug(DEBUG_IRQ, "Queued deferred work (%d)", ret); +} + +static inline struct llist_node *get_event_list(struct cc33xx *cc) +{ + struct llist_node *node; + + node = llist_del_all(&cc->event_list); + if (!node) + return NULL; + + return llist_reverse_order(node); +} + +void flush_deferred_event_list(struct cc33xx *cc) +{ + struct event_node *event_node, *tmp; + struct llist_node *event_list; + + event_list = get_event_list(cc); + llist_for_each_entry_safe(event_node, tmp, event_list, node) { + kfree(event_node); + } +} + +static int wait_for_event_or_timeout(struct cc33xx *cc, u32 mask, bool *timeout) +{ + u32 event; + unsigned long timeout_time; + u16 poll_count = 0; + int ret = 0; + struct event_node *event_node, *tmp; + struct llist_node *event_list; + u32 vector; + + *timeout = false; + + timeout_time = jiffies + msecs_to_jiffies(CC33XX_EVENT_TIMEOUT); + + do { + if (time_after(jiffies, timeout_time)) { + cc33xx_debug(DEBUG_CMD, "timeout waiting for event %d", + (int)mask); + *timeout = true; + goto out; + } + + poll_count++; + if (poll_count < CC33XX_WAIT_EVENT_FAST_POLL_COUNT) + usleep_range(50, 51); + else + usleep_range(1000, 5000); + + vector = 0; + event_list = get_event_list(cc); + llist_for_each_entry_safe(event_node, tmp, event_list, node) { + vector |= le32_to_cpu(event_node->event_data.events_vector); + } + + event = vector & mask; + } while (!event); + +out: + + return ret; +} + +int cc33xx_wait_for_event(struct cc33xx *cc, enum cc33xx_wait_event event, + bool *timeout) +{ + u32 local_event; + + switch (event) { + case CC33XX_EVENT_PEER_REMOVE_COMPLETE: + local_event = PEER_REMOVE_COMPLETE_EVENT_ID; + break; + + case CC33XX_EVENT_DFS_CONFIG_COMPLETE: + local_event = DFS_CHANNELS_CONFIG_COMPLETE_EVENT; + break; + + default: + /* event not implemented */ + return 0; + } + return wait_for_event_or_timeout(cc, local_event, timeout); +} + +static void cc33xx_event_sched_scan_completed(struct cc33xx *cc, u8 status) +{ + cc33xx_debug(DEBUG_EVENT, + "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)", status); + + if (cc->mac80211_scan_stopped) { + cc->mac80211_scan_stopped = false; + } else { + if (cc->sched_vif) { + ieee80211_sched_scan_stopped(cc->hw); + cc->sched_vif = NULL; + } + } +} + +static void cc33xx_event_channel_switch(struct cc33xx *cc, + unsigned long roles_bitmap, + bool success) +{ + struct cc33xx_vif *wlvif; + struct ieee80211_vif *vif; + + cc33xx_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d", + __func__, roles_bitmap, success); + + cc33xx_for_each_wlvif(cc, wlvif) { + if (wlvif->role_id == CC33XX_INVALID_ROLE_ID || + !test_bit(wlvif->role_id, &roles_bitmap)) + continue; + + if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS, + &wlvif->flags)) + continue; + + vif = cc33xx_wlvif_to_vif(wlvif); + + if (wlvif->bss_type == BSS_TYPE_STA_BSS) { + ieee80211_chswitch_done(vif, success, 0); + cancel_delayed_work(&wlvif->channel_switch_work); + } else { + set_bit(WLVIF_FLAG_BEACON_DISABLED, &wlvif->flags); + ieee80211_csa_finish(vif, 0); + } + } +} + +static void cc33xx_disconnect_sta(struct cc33xx *cc, unsigned long sta_bitmap) +{ + u32 num_packets = cc->conf.host_conf.tx.max_tx_retries; + struct cc33xx_vif *wlvif; + struct ieee80211_vif *vif; + struct ieee80211_sta *sta; + const u8 *addr; + int h; + + for_each_set_bit(h, &sta_bitmap, CC33XX_MAX_LINKS) { + bool found = false; + /* find the ap vif connected to this sta */ + cc33xx_for_each_wlvif_ap(cc, wlvif) { + if (!test_bit(h, wlvif->ap.sta_hlid_map)) + continue; + found = true; + break; + } + if (!found) + continue; + + vif = cc33xx_wlvif_to_vif(wlvif); + addr = cc->links[h].addr; + + rcu_read_lock(); + sta = ieee80211_find_sta(vif, addr); + if (sta) { + cc33xx_debug(DEBUG_EVENT, "remove sta %d", h); + ieee80211_report_low_ack(sta, num_packets); + } + rcu_read_unlock(); + } +} + +static void cc33xx_event_max_tx_failure(struct cc33xx *cc, + unsigned long sta_bitmap) +{ + cc33xx_disconnect_sta(cc, sta_bitmap); +} + +static void cc33xx_event_roc_complete(struct cc33xx *cc) +{ + if (cc->roc_vif) + ieee80211_ready_on_channel(cc->hw); +} + +static void cc33xx_event_beacon_loss(struct cc33xx *cc, + unsigned long roles_bitmap) +{ + /* We are HW_MONITOR device. On beacon loss - queue + * connection loss work. Cancel it on REGAINED event. + */ + struct cc33xx_vif *wlvif; + struct ieee80211_vif *vif; + int delay = cc->conf.host_conf.conn.synch_fail_thold; + + delay *= cc->conf.host_conf.conn.bss_lose_timeout; + + cc33xx_info("Beacon loss detected. roles:0x%lx", roles_bitmap); + + cc33xx_for_each_wlvif_sta(cc, wlvif) { + if (wlvif->role_id == CC33XX_INVALID_ROLE_ID || + !test_bit(wlvif->role_id, &roles_bitmap)) + continue; + + vif = cc33xx_wlvif_to_vif(wlvif); + + /* don't attempt roaming in case of p2p */ + if (wlvif->p2p) { + ieee80211_connection_loss(vif); + continue; + } + + /* if the work is already queued, it should take place. + * We don't want to delay the connection loss + * indication any more. + */ + ieee80211_queue_delayed_work(cc->hw, + &wlvif->connection_loss_work, + msecs_to_jiffies(delay)); + + ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL); + } +} + +void process_deferred_events(struct cc33xx *cc) +{ + struct event_node *event_node, *tmp; + struct llist_node *event_list; + u32 vector; + + event_list = get_event_list(cc); + + llist_for_each_entry_safe(event_node, tmp, event_list, node) { + struct cc33xx_event_mailbox *event_data; + + event_data = &event_node->event_data; + + vector = le32_to_cpu(event_node->event_data.events_vector); + cc33xx_debug(DEBUG_EVENT, "MBOX vector: 0x%x", vector); + + if (vector & SCAN_COMPLETE_EVENT_ID) { + cc33xx_debug(DEBUG_EVENT, "scan results: %d", + event_node->event_data.number_of_scan_results); + + if (cc->scan_wlvif) + cc33xx_scan_completed(cc, cc->scan_wlvif); + } + + if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) + cc33xx_event_sched_scan_completed(cc, 1); + + if (vector & BSS_LOSS_EVENT_ID) { + u16 bss_loss_bitmap = le16_to_cpu(event_data->bss_loss_bitmap); + + cc33xx_event_beacon_loss(cc, bss_loss_bitmap); + } + + if (vector & MAX_TX_FAILURE_EVENT_ID) { + u16 tx_retry_exceeded_bitmap = + le16_to_cpu(event_data->tx_retry_exceeded_bitmap); + + cc33xx_event_max_tx_failure(cc, tx_retry_exceeded_bitmap); + } + + if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) { + cc33xx_debug(DEBUG_EVENT, + "PERIODIC_SCAN_REPORT (results %d)", + event_data->number_of_sched_scan_results); + + cc33xx_scan_sched_scan_results(cc); + } + + if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) { + u16 channel_switch_role_id_bitmap = + le16_to_cpu(event_data->channel_switch_role_id_bitmap); + + cc33xx_event_channel_switch(cc, channel_switch_role_id_bitmap, true); + } + + if (vector & REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID) + cc33xx_event_roc_complete(cc); + + kfree(event_node); + } +} diff --git a/drivers/net/wireless/ti/cc33xx/event.h b/drivers/net/wireless/ti/cc33xx/event.h new file mode 100644 index 000000000000..7952f0b7b4aa --- /dev/null +++ b/drivers/net/wireless/ti/cc33xx/event.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/ + */ + +#ifndef __EVENT_H__ +#define __EVENT_H__ + +/* Mbox events + * + * The event mechanism is based on a pair of event buffers (buffers A and + * B) at fixed locations in the target's memory. The host processes one + * buffer while the other buffer continues to collect events. If the host + * is not processing events, an interrupt is issued to signal that a buffer + * is ready. Once the host is done with processing events from one buffer, + * it signals the target (with an ACK interrupt) that the event buffer is + * free. + */ + +enum { + RSSI_SNR_TRIGGER_0_EVENT_ID = BIT(0), + RSSI_SNR_TRIGGER_1_EVENT_ID = BIT(1), + RSSI_SNR_TRIGGER_2_EVENT_ID = BIT(2), + RSSI_SNR_TRIGGER_3_EVENT_ID = BIT(3), + RSSI_SNR_TRIGGER_4_EVENT_ID = BIT(4), + RSSI_SNR_TRIGGER_5_EVENT_ID = BIT(5), + RSSI_SNR_TRIGGER_6_EVENT_ID = BIT(6), + RSSI_SNR_TRIGGER_7_EVENT_ID = BIT(7), + + EVENT_MBOX_ALL_EVENT_ID = 0x7fffffff, +}; + +enum { + SCAN_COMPLETE_EVENT_ID = BIT(8), + RADAR_DETECTED_EVENT_ID = BIT(9), + CHANNEL_SWITCH_COMPLETE_EVENT_ID = BIT(10), + BSS_LOSS_EVENT_ID = BIT(11), + MAX_TX_FAILURE_EVENT_ID = BIT(12), + DUMMY_PACKET_EVENT_ID = BIT(13), + INACTIVE_STA_EVENT_ID = BIT(14), + PEER_REMOVE_COMPLETE_EVENT_ID = BIT(15), + PERIODIC_SCAN_COMPLETE_EVENT_ID = BIT(16), + BA_SESSION_RX_CONSTRAINT_EVENT_ID = BIT(17), + REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID = BIT(18), + DFS_CHANNELS_CONFIG_COMPLETE_EVENT = BIT(19), + PERIODIC_SCAN_REPORT_EVENT_ID = BIT(20), + RX_BA_WIN_SIZE_CHANGE_EVENT_ID = BIT(21), + SMART_CONFIG_SYNC_EVENT_ID = BIT(22), + SMART_CONFIG_DECODE_EVENT_ID = BIT(23), + TIME_SYNC_EVENT_ID = BIT(24), + FW_LOGGER_INDICATION = BIT(25), +}; + +/* events the driver might want to wait for */ +enum cc33xx_wait_event { + CC33XX_EVENT_ROLE_STOP_COMPLETE, + CC33XX_EVENT_PEER_REMOVE_COMPLETE, + CC33XX_EVENT_DFS_CONFIG_COMPLETE +}; + +#define NUM_OF_RSSI_SNR_TRIGGERS 8 + +struct cc33xx; + +int cc33xx_wait_for_event(struct cc33xx *cc, enum cc33xx_wait_event event, + bool *timeout); +void deffer_event(struct cc33xx *cc, const void *event_payload, size_t event_length); +void process_deferred_events(struct cc33xx *cc); +void flush_deferred_event_list(struct cc33xx *cc); + +#endif /* __EVENT_H__ */ -- 2.25.1
