Quelle  event.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 */

#include "wlcore.h"
#include "debug.h"
#include "io.h"
#include "event.h"
#include "ps.h"
#include "scan.h"
#include "wl12xx_80211.h"
#include "hw_ops.h"

#define WL18XX_LOGGER_SDIO_BUFF_MAX (0x1020)
#define WL18XX_DATA_RAM_BASE_ADDRESS (0x20000000)
#define WL18XX_LOGGER_SDIO_BUFF_ADDR (0x40159c)
#define WL18XX_LOGGER_BUFF_OFFSET (sizeof(struct fw_logger_information))
#define WL18XX_LOGGER_READ_POINT_OFFSET  (12)

int wlcore_event_fw_logger(struct wl1271 *wl)
{
 int ret;
 struct fw_logger_information fw_log;
 u8  *buffer;
 u32 internal_fw_addrbase = WL18XX_DATA_RAM_BASE_ADDRESS;
 u32 addr = WL18XX_LOGGER_SDIO_BUFF_ADDR;
 u32 addr_ptr;
 u32 buff_start_ptr;
 u32 buff_read_ptr;
 u32 buff_end_ptr;
 u32 available_len;
 u32 actual_len;
 u32 clear_ptr;
 size_t len;
 u32 start_loc;

 buffer = kzalloc(WL18XX_LOGGER_SDIO_BUFF_MAX, GFP_KERNEL);
 if (!buffer) {
  wl1271_error("Fail to allocate fw logger memory");
  actual_len = 0;
  goto out;
 }

 ret = wlcore_read(wl, addr, buffer, WL18XX_LOGGER_SDIO_BUFF_MAX,
     false);
 if (ret < 0) {
  wl1271_error("Fail to read logger buffer, error_id = %d",
        ret);
  actual_len = 0;
  goto free_out;
 }

 memcpy(&fw_log, buffer, sizeof(fw_log));

 actual_len = le32_to_cpu(fw_log.actual_buff_size);
 if (actual_len == 0)
  goto free_out;

 /* Calculate the internal pointer to the fwlog structure */
 addr_ptr = internal_fw_addrbase + addr;

 /* Calculate the internal pointers to the start and end of log buffer */
 buff_start_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET;
 buff_end_ptr = buff_start_ptr + le32_to_cpu(fw_log.max_buff_size);

 /* Read the read pointer and validate it */
 buff_read_ptr = le32_to_cpu(fw_log.buff_read_ptr);
 if (buff_read_ptr < buff_start_ptr ||
     buff_read_ptr >= buff_end_ptr) {
  wl1271_error("buffer read pointer out of bounds: %x not in (%x-%x)\n",
        buff_read_ptr, buff_start_ptr, buff_end_ptr);
  goto free_out;
 }

 start_loc = buff_read_ptr - addr_ptr;
 available_len = buff_end_ptr - buff_read_ptr;

 /* Copy initial part up to the end of ring buffer */
 len = min(actual_len, available_len);
 wl12xx_copy_fwlog(wl, &buffer[start_loc], len);
 clear_ptr = addr_ptr + start_loc + len;
 if (clear_ptr == buff_end_ptr)
  clear_ptr = buff_start_ptr;

 /* Copy any remaining part from beginning of ring buffer */
 len = actual_len - len;
 if (len) {
  wl12xx_copy_fwlog(wl,
      &buffer[WL18XX_LOGGER_BUFF_OFFSET],
      len);
  clear_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET + len;
 }

 /* Update the read pointer */
 ret = wlcore_write32(wl, addr + WL18XX_LOGGER_READ_POINT_OFFSET,
        clear_ptr);
free_out:
 kfree(buffer);
out:
 return actual_len;
}
EXPORT_SYMBOL_GPL(wlcore_event_fw_logger);

void wlcore_event_rssi_trigger(struct wl1271 *wl, s8 *metric_arr)
{
 struct wl12xx_vif *wlvif;
 struct ieee80211_vif *vif;
 enum nl80211_cqm_rssi_threshold_event event;
 s8 metric = metric_arr[0];

 wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);

 /* TODO: check actual multi-role support */
 wl12xx_for_each_wlvif_sta(wl, wlvif) {
  if (metric <= wlvif->rssi_thold)
   event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
  else
   event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

  vif = wl12xx_wlvif_to_vif(wlvif);
  if (event != wlvif->last_rssi_event)
   ieee80211_cqm_rssi_notify(vif, event, metric,
        GFP_KERNEL);
  wlvif->last_rssi_event = event;
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);

static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

 if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
  u8 hlid = wlvif->sta.hlid;
  if (!wl->links[hlid].ba_bitmap)
   return;
  ieee80211_stop_rx_ba_session(vif, wl->links[hlid].ba_bitmap,
          vif->bss_conf.bssid);
 } else {
  u8 hlid;
  struct wl1271_link *lnk;
  for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
     wl->num_links) {
   lnk = &wl->links[hlid];
   if (!lnk->ba_bitmap)
    continue;

   ieee80211_stop_rx_ba_session(vif,
           lnk->ba_bitmap,
           lnk->addr);
  }
 }
}

void wlcore_event_soft_gemini_sense(struct wl1271 *wl, u8 enable)
{
 struct wl12xx_vif *wlvif;

 if (enable) {
  set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 } else {
  clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
  wl12xx_for_each_wlvif_sta(wl, wlvif) {
   wl1271_recalc_rx_streaming(wl, wlvif);
  }
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);

void wlcore_event_sched_scan_completed(struct wl1271 *wl,
           u8 status)
{
 wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
       status);

 if (wl->sched_vif) {
  ieee80211_sched_scan_stopped(wl->hw);
  wl->sched_vif = NULL;
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);

void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
       unsigned long roles_bitmap,
       unsigned long allowed_bitmap)
{
 struct wl12xx_vif *wlvif;

 wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
       __func__, roles_bitmap, allowed_bitmap);

 wl12xx_for_each_wlvif(wl, wlvif) {
  if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
      !test_bit(wlvif->role_id , &roles_bitmap))
   continue;

  wlvif->ba_allowed = !!test_bit(wlvif->role_id,
            &allowed_bitmap);
  if (!wlvif->ba_allowed)
   wl1271_stop_ba_event(wl, wlvif);
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);

void wlcore_event_channel_switch(struct wl1271 *wl,
     unsigned long roles_bitmap,
     bool success)
{
 struct wl12xx_vif *wlvif;
 struct ieee80211_vif *vif;

 wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
       __func__, roles_bitmap, success);

 wl12xx_for_each_wlvif(wl, wlvif) {
  if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
      !test_bit(wlvif->role_id , &roles_bitmap))
   continue;

  if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
     &wlvif->flags))
   continue;

  vif = wl12xx_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);
  }
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);

void wlcore_event_dummy_packet(struct wl1271 *wl)
{
 if (wl->plt) {
  wl1271_info("Got DUMMY_PACKET event in PLT mode. FW bug, ignoring.");
  return;
 }

 wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
 wl1271_tx_dummy_packet(wl);
}
EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);

static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
{
 u32 num_packets = wl->conf.tx.max_tx_retries;
 struct wl12xx_vif *wlvif;
 struct ieee80211_vif *vif;
 struct ieee80211_sta *sta;
 const u8 *addr;
 int h;

 for_each_set_bit(h, &sta_bitmap, wl->num_links) {
  bool found = false;
  /* find the ap vif connected to this sta */
  wl12xx_for_each_wlvif_ap(wl, wlvif) {
   if (!test_bit(h, wlvif->ap.sta_hlid_map))
    continue;
   found = true;
   break;
  }
  if (!found)
   continue;

  vif = wl12xx_wlvif_to_vif(wlvif);
  addr = wl->links[h].addr;

  rcu_read_lock();
  sta = ieee80211_find_sta(vif, addr);
  if (sta) {
   wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
   ieee80211_report_low_ack(sta, num_packets);
  }
  rcu_read_unlock();
 }
}

void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
{
 wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
 wlcore_disconnect_sta(wl, sta_bitmap);
}
EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);

void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
{
 wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
 wlcore_disconnect_sta(wl, sta_bitmap);
}
EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);

void wlcore_event_roc_complete(struct wl1271 *wl)
{
 wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
 if (wl->roc_vif)
  ieee80211_ready_on_channel(wl->hw);
}
EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);

void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
{
 /*
 * We are HW_MONITOR device. On beacon loss - queue
 * connection loss work. Cancel it on REGAINED event.
 */
 struct wl12xx_vif *wlvif;
 struct ieee80211_vif *vif;
 int delay = wl->conf.conn.synch_fail_thold *
    wl->conf.conn.bss_lose_timeout;

 wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);

 wl12xx_for_each_wlvif_sta(wl, wlvif) {
  if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
      !test_bit(wlvif->role_id , &roles_bitmap))
   continue;

  vif = wl12xx_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(wl->hw,
          &wlvif->connection_loss_work,
          msecs_to_jiffies(delay));

  ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
 }
}
EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);

int wl1271_event_unmask(struct wl1271 *wl)
{
 int ret;

 wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
 ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 if (ret < 0)
  return ret;

 return 0;
}

int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
{
 int ret;

 wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);

 if (mbox_num > 1)
  return -EINVAL;

 /* first we read the mbox descriptor */
 ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
     wl->mbox_size, false);
 if (ret < 0)
  return ret;

 /* process the descriptor */
 ret = wl->ops->process_mailbox_events(wl);
 if (ret < 0)
  return ret;

 /*
 * TODO: we just need this because one bit is in a different
 * place.  Is there any better way?
 */
 ret = wl->ops->ack_event(wl);

 return ret;
}