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main.c
5735 lines (4691 loc) · 141 KB
/
main.c
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/*
* This file is part of wl1271
*
* Copyright (C) 2008-2010 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include <linux/vmalloc.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/wl12xx.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include "wlcore.h"
#include "debug.h"
#include "wl12xx_80211.h"
#include "io.h"
#include "event.h"
#include "tx.h"
#include "rx.h"
#include "ps.h"
#include "init.h"
#include "debugfs.h"
#include "cmd.h"
#include "boot.h"
#include "testmode.h"
#include "scan.h"
#include "hw_ops.h"
#include "version.h"
#define WL1271_BOOT_RETRIES 3
#define WL1271_BOOT_RETRIES 3
static char *fwlog_param;
static bool bug_on_recovery;
static bool no_recovery;
static void __wl1271_op_remove_interface(struct wl1271 *wl,
struct ieee80211_vif *vif,
bool reset_tx_queues);
static void wlcore_op_stop_locked(struct wl1271 *wl);
static void wl1271_free_ap_keys(struct wl1271 *wl, struct wl12xx_vif *wlvif);
static int wl12xx_set_authorized(struct wl1271 *wl,
struct wl12xx_vif *wlvif)
{
int ret;
if (WARN_ON(wlvif->bss_type != BSS_TYPE_STA_BSS))
return -EINVAL;
if (!test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
return 0;
if (test_and_set_bit(WLVIF_FLAG_STA_STATE_SENT, &wlvif->flags))
return 0;
ret = wl12xx_cmd_set_peer_state(wl, wlvif->sta.hlid);
if (ret < 0)
return ret;
wl12xx_croc(wl, wlvif->role_id);
wl1271_info("Association completed.");
return 0;
}
static int wl1271_reg_notify(struct wiphy *wiphy,
struct regulatory_request *request)
{
struct ieee80211_supported_band *band;
struct ieee80211_channel *ch;
int i;
band = wiphy->bands[IEEE80211_BAND_5GHZ];
for (i = 0; i < band->n_channels; i++) {
ch = &band->channels[i];
if (ch->flags & IEEE80211_CHAN_DISABLED)
continue;
if (ch->flags & IEEE80211_CHAN_RADAR)
ch->flags |= IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_PASSIVE_SCAN;
}
return 0;
}
static int wl1271_set_rx_streaming(struct wl1271 *wl, struct wl12xx_vif *wlvif,
bool enable)
{
int ret = 0;
/* we should hold wl->mutex */
ret = wl1271_acx_ps_rx_streaming(wl, wlvif, enable);
if (ret < 0)
goto out;
if (enable)
set_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags);
else
clear_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags);
out:
return ret;
}
/*
* this function is being called when the rx_streaming interval
* has beed changed or rx_streaming should be disabled
*/
int wl1271_recalc_rx_streaming(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
int ret = 0;
int period = wl->conf.rx_streaming.interval;
/* don't reconfigure if rx_streaming is disabled */
if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
goto out;
/* reconfigure/disable according to new streaming_period */
if (period &&
test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) &&
(wl->conf.rx_streaming.always ||
test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)))
ret = wl1271_set_rx_streaming(wl, wlvif, true);
else {
ret = wl1271_set_rx_streaming(wl, wlvif, false);
/* don't cancel_work_sync since we might deadlock */
del_timer_sync(&wlvif->rx_streaming_timer);
}
out:
return ret;
}
static void wl1271_rx_streaming_enable_work(struct work_struct *work)
{
int ret;
struct wl12xx_vif *wlvif = container_of(work, struct wl12xx_vif,
rx_streaming_enable_work);
struct wl1271 *wl = wlvif->wl;
mutex_lock(&wl->mutex);
if (test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags) ||
!test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) ||
(!wl->conf.rx_streaming.always &&
!test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)))
goto out;
if (!wl->conf.rx_streaming.interval)
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1271_set_rx_streaming(wl, wlvif, true);
if (ret < 0)
goto out_sleep;
/* stop it after some time of inactivity */
mod_timer(&wlvif->rx_streaming_timer,
jiffies + msecs_to_jiffies(wl->conf.rx_streaming.duration));
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static void wl1271_rx_streaming_disable_work(struct work_struct *work)
{
int ret;
struct wl12xx_vif *wlvif = container_of(work, struct wl12xx_vif,
rx_streaming_disable_work);
struct wl1271 *wl = wlvif->wl;
mutex_lock(&wl->mutex);
if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1271_set_rx_streaming(wl, wlvif, false);
if (ret)
goto out_sleep;
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static void wl1271_rx_streaming_timer(unsigned long data)
{
struct wl12xx_vif *wlvif = (struct wl12xx_vif *)data;
struct wl1271 *wl = wlvif->wl;
ieee80211_queue_work(wl->hw, &wlvif->rx_streaming_disable_work);
}
/* wl->mutex must be taken */
void wl12xx_rearm_tx_watchdog_locked(struct wl1271 *wl)
{
/* if the watchdog is not armed, don't do anything */
if (wl->tx_allocated_blocks == 0)
return;
cancel_delayed_work(&wl->tx_watchdog_work);
ieee80211_queue_delayed_work(wl->hw, &wl->tx_watchdog_work,
msecs_to_jiffies(wl->conf.tx.tx_watchdog_timeout));
}
static void wl12xx_tx_watchdog_work(struct work_struct *work)
{
struct delayed_work *dwork;
struct wl1271 *wl;
dwork = container_of(work, struct delayed_work, work);
wl = container_of(dwork, struct wl1271, tx_watchdog_work);
mutex_lock(&wl->mutex);
if (unlikely(wl->state == WL1271_STATE_OFF))
goto out;
/* Tx went out in the meantime - everything is ok */
if (unlikely(wl->tx_allocated_blocks == 0))
goto out;
/*
* if a ROC is in progress, we might not have any Tx for a long
* time (e.g. pending Tx on the non-ROC channels)
*/
if (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) < WL12XX_MAX_ROLES) {
wl1271_debug(DEBUG_TX, "No Tx (in FW) for %d ms due to ROC",
wl->conf.tx.tx_watchdog_timeout);
wl12xx_rearm_tx_watchdog_locked(wl);
goto out;
}
/*
* if a scan is in progress, we might not have any Tx for a long
* time
*/
if (wl->scan.state != WL1271_SCAN_STATE_IDLE) {
wl1271_debug(DEBUG_TX, "No Tx (in FW) for %d ms due to scan",
wl->conf.tx.tx_watchdog_timeout);
wl12xx_rearm_tx_watchdog_locked(wl);
goto out;
}
/*
* AP might cache a frame for a long time for a sleeping station,
* so rearm the timer if there's an AP interface with stations. If
* Tx is genuinely stuck we will most hopefully discover it when all
* stations are removed due to inactivity.
*/
if (wl->active_sta_count) {
wl1271_debug(DEBUG_TX, "No Tx (in FW) for %d ms. AP has "
" %d stations",
wl->conf.tx.tx_watchdog_timeout,
wl->active_sta_count);
wl12xx_rearm_tx_watchdog_locked(wl);
goto out;
}
wl1271_error("Tx stuck (in FW) for %d ms. Starting recovery",
wl->conf.tx.tx_watchdog_timeout);
wl12xx_queue_recovery_work(wl);
out:
mutex_unlock(&wl->mutex);
}
static void wlcore_adjust_conf(struct wl1271 *wl)
{
/* Adjust settings according to optional module parameters */
if (fwlog_param) {
if (!strcmp(fwlog_param, "continuous")) {
wl->conf.fwlog.mode = WL12XX_FWLOG_CONTINUOUS;
} else if (!strcmp(fwlog_param, "ondemand")) {
wl->conf.fwlog.mode = WL12XX_FWLOG_ON_DEMAND;
} else if (!strcmp(fwlog_param, "dbgpins")) {
wl->conf.fwlog.mode = WL12XX_FWLOG_CONTINUOUS;
wl->conf.fwlog.output = WL12XX_FWLOG_OUTPUT_DBG_PINS;
} else if (!strcmp(fwlog_param, "disable")) {
wl->conf.fwlog.mem_blocks = 0;
wl->conf.fwlog.output = WL12XX_FWLOG_OUTPUT_NONE;
} else {
wl1271_error("Unknown fwlog parameter %s", fwlog_param);
}
}
}
static void wl12xx_irq_ps_regulate_link(struct wl1271 *wl,
struct wl12xx_vif *wlvif,
u8 hlid, u8 tx_pkts)
{
bool fw_ps, single_sta;
fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
single_sta = (wl->active_sta_count == 1);
/*
* Wake up from high level PS if the STA is asleep with too little
* packets in FW or if the STA is awake.
*/
if (!fw_ps || tx_pkts < WL1271_PS_STA_MAX_PACKETS)
wl12xx_ps_link_end(wl, wlvif, hlid);
/*
* Start high-level PS if the STA is asleep with enough blocks in FW.
* Make an exception if this is the only connected station. In this
* case FW-memory congestion is not a problem.
*/
else if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
wl12xx_ps_link_start(wl, wlvif, hlid, true);
}
static void wl12xx_irq_update_links_status(struct wl1271 *wl,
struct wl12xx_vif *wlvif,
struct wl_fw_status_2 *status)
{
struct wl1271_link *lnk;
u32 cur_fw_ps_map;
u8 hlid, cnt;
/* TODO: also use link_fast_bitmap here */
cur_fw_ps_map = le32_to_cpu(status->link_ps_bitmap);
if (wl->ap_fw_ps_map != cur_fw_ps_map) {
wl1271_debug(DEBUG_PSM,
"link ps prev 0x%x cur 0x%x changed 0x%x",
wl->ap_fw_ps_map, cur_fw_ps_map,
wl->ap_fw_ps_map ^ cur_fw_ps_map);
wl->ap_fw_ps_map = cur_fw_ps_map;
}
for_each_set_bit(hlid, wlvif->ap.sta_hlid_map, WL12XX_MAX_LINKS) {
lnk = &wl->links[hlid];
cnt = status->counters.tx_lnk_free_pkts[hlid] -
lnk->prev_freed_pkts;
lnk->prev_freed_pkts = status->counters.tx_lnk_free_pkts[hlid];
lnk->allocated_pkts -= cnt;
wl12xx_irq_ps_regulate_link(wl, wlvif, hlid,
lnk->allocated_pkts);
}
}
static int wlcore_fw_status(struct wl1271 *wl,
struct wl_fw_status_1 *status_1,
struct wl_fw_status_2 *status_2)
{
struct wl12xx_vif *wlvif;
struct timespec ts;
u32 old_tx_blk_count = wl->tx_blocks_available;
int avail, freed_blocks;
int i;
size_t status_len;
int ret;
status_len = WLCORE_FW_STATUS_1_LEN(wl->num_rx_desc) +
sizeof(*status_2) + wl->fw_status_priv_len;
ret = wlcore_raw_read_data(wl, REG_RAW_FW_STATUS_ADDR, status_1,
status_len, false);
if (ret < 0)
return ret;
wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
"drv_rx_counter = %d, tx_results_counter = %d)",
status_1->intr,
status_1->fw_rx_counter,
status_1->drv_rx_counter,
status_1->tx_results_counter);
for (i = 0; i < NUM_TX_QUEUES; i++) {
/* prevent wrap-around in freed-packets counter */
wl->tx_allocated_pkts[i] -=
(status_2->counters.tx_released_pkts[i] -
wl->tx_pkts_freed[i]) & 0xff;
wl->tx_pkts_freed[i] = status_2->counters.tx_released_pkts[i];
}
/* prevent wrap-around in total blocks counter */
if (likely(wl->tx_blocks_freed <=
le32_to_cpu(status_2->total_released_blks)))
freed_blocks = le32_to_cpu(status_2->total_released_blks) -
wl->tx_blocks_freed;
else
freed_blocks = 0x100000000LL - wl->tx_blocks_freed +
le32_to_cpu(status_2->total_released_blks);
wl->tx_blocks_freed = le32_to_cpu(status_2->total_released_blks);
wl->tx_allocated_blocks -= freed_blocks;
/*
* If the FW freed some blocks:
* If we still have allocated blocks - re-arm the timer, Tx is
* not stuck. Otherwise, cancel the timer (no Tx currently).
*/
if (freed_blocks) {
if (wl->tx_allocated_blocks)
wl12xx_rearm_tx_watchdog_locked(wl);
else
cancel_delayed_work(&wl->tx_watchdog_work);
}
avail = le32_to_cpu(status_2->tx_total) - wl->tx_allocated_blocks;
/*
* The FW might change the total number of TX memblocks before
* we get a notification about blocks being released. Thus, the
* available blocks calculation might yield a temporary result
* which is lower than the actual available blocks. Keeping in
* mind that only blocks that were allocated can be moved from
* TX to RX, tx_blocks_available should never decrease here.
*/
wl->tx_blocks_available = max((int)wl->tx_blocks_available,
avail);
/* if more blocks are available now, tx work can be scheduled */
if (wl->tx_blocks_available > old_tx_blk_count)
clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
/* for AP update num of allocated TX blocks per link and ps status */
wl12xx_for_each_wlvif_ap(wl, wlvif) {
wl12xx_irq_update_links_status(wl, wlvif, status_2);
}
/* update the host-chipset time offset */
getnstimeofday(&ts);
wl->time_offset = (timespec_to_ns(&ts) >> 10) -
(s64)le32_to_cpu(status_2->fw_localtime);
return 0;
}
static void wl1271_flush_deferred_work(struct wl1271 *wl)
{
struct sk_buff *skb;
/* Pass all received frames to the network stack */
while ((skb = skb_dequeue(&wl->deferred_rx_queue)))
ieee80211_rx_ni(wl->hw, skb);
/* Return sent skbs to the network stack */
while ((skb = skb_dequeue(&wl->deferred_tx_queue)))
ieee80211_tx_status_ni(wl->hw, skb);
}
static void wl1271_netstack_work(struct work_struct *work)
{
struct wl1271 *wl =
container_of(work, struct wl1271, netstack_work);
do {
wl1271_flush_deferred_work(wl);
} while (skb_queue_len(&wl->deferred_rx_queue));
}
#define WL1271_IRQ_MAX_LOOPS 256
static int wlcore_irq_locked(struct wl1271 *wl)
{
int ret = 0;
u32 intr;
int loopcount = WL1271_IRQ_MAX_LOOPS;
bool done = false;
unsigned int defer_count;
unsigned long flags;
/*
* In case edge triggered interrupt must be used, we cannot iterate
* more than once without introducing race conditions with the hardirq.
*/
if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
loopcount = 1;
wl1271_debug(DEBUG_IRQ, "IRQ work");
if (unlikely(wl->state == WL1271_STATE_OFF))
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
while (!done && loopcount--) {
/*
* In order to avoid a race with the hardirq, clear the flag
* before acknowledging the chip. Since the mutex is held,
* wl1271_ps_elp_wakeup cannot be called concurrently.
*/
clear_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
smp_mb__after_clear_bit();
ret = wlcore_fw_status(wl, wl->fw_status_1, wl->fw_status_2);
if (ret < 0)
goto out;
wlcore_hw_tx_immediate_compl(wl);
intr = le32_to_cpu(wl->fw_status_1->intr);
intr &= WLCORE_ALL_INTR_MASK;
if (!intr) {
done = true;
continue;
}
if (unlikely(intr & WL1271_ACX_INTR_WATCHDOG)) {
wl1271_error("HW watchdog interrupt received! starting recovery.");
wl->watchdog_recovery = true;
ret = -EIO;
/* restarting the chip. ignore any other interrupt. */
goto out;
}
if (unlikely(intr & WL1271_ACX_SW_INTR_WATCHDOG)) {
wl1271_error("SW watchdog interrupt received! "
"starting recovery.");
wl->watchdog_recovery = true;
ret = -EIO;
/* restarting the chip. ignore any other interrupt. */
goto out;
}
if (likely(intr & WL1271_ACX_INTR_DATA)) {
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
ret = wlcore_rx(wl, wl->fw_status_1);
if (ret < 0)
goto out;
/* Check if any tx blocks were freed */
spin_lock_irqsave(&wl->wl_lock, flags);
if (!test_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags) &&
wl1271_tx_total_queue_count(wl) > 0) {
spin_unlock_irqrestore(&wl->wl_lock, flags);
/*
* In order to avoid starvation of the TX path,
* call the work function directly.
*/
ret = wlcore_tx_work_locked(wl);
if (ret < 0)
goto out;
} else {
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
/* check for tx results */
ret = wlcore_hw_tx_delayed_compl(wl);
if (ret < 0)
goto out;
/* Make sure the deferred queues don't get too long */
defer_count = skb_queue_len(&wl->deferred_tx_queue) +
skb_queue_len(&wl->deferred_rx_queue);
if (defer_count > WL1271_DEFERRED_QUEUE_LIMIT)
wl1271_flush_deferred_work(wl);
}
if (intr & WL1271_ACX_INTR_EVENT_A) {
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_EVENT_A");
ret = wl1271_event_handle(wl, 0);
if (ret < 0)
goto out;
}
if (intr & WL1271_ACX_INTR_EVENT_B) {
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_EVENT_B");
ret = wl1271_event_handle(wl, 1);
if (ret < 0)
goto out;
}
if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
wl1271_debug(DEBUG_IRQ,
"WL1271_ACX_INTR_INIT_COMPLETE");
if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
}
wl1271_ps_elp_sleep(wl);
out:
return ret;
}
static irqreturn_t wlcore_irq(int irq, void *cookie)
{
int ret;
unsigned long flags;
struct wl1271 *wl = cookie;
/* TX might be handled here, avoid redundant work */
set_bit(WL1271_FLAG_TX_PENDING, &wl->flags);
cancel_work_sync(&wl->tx_work);
mutex_lock(&wl->mutex);
ret = wlcore_irq_locked(wl);
if (ret)
wl12xx_queue_recovery_work(wl);
spin_lock_irqsave(&wl->wl_lock, flags);
/* In case TX was not handled here, queue TX work */
clear_bit(WL1271_FLAG_TX_PENDING, &wl->flags);
if (!test_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags) &&
wl1271_tx_total_queue_count(wl) > 0)
ieee80211_queue_work(wl->hw, &wl->tx_work);
#ifdef CONFIG_HAS_WAKELOCK
if (test_and_clear_bit(WL1271_FLAG_WAKE_LOCK, &wl->flags))
wake_unlock(&wl->wake_lock);
#endif
spin_unlock_irqrestore(&wl->wl_lock, flags);
mutex_unlock(&wl->mutex);
return IRQ_HANDLED;
}
struct vif_counter_data {
u8 counter;
struct ieee80211_vif *cur_vif;
bool cur_vif_running;
};
static void wl12xx_vif_count_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct vif_counter_data *counter = data;
counter->counter++;
if (counter->cur_vif == vif)
counter->cur_vif_running = true;
}
/* caller must not hold wl->mutex, as it might deadlock */
static void wl12xx_get_vif_count(struct ieee80211_hw *hw,
struct ieee80211_vif *cur_vif,
struct vif_counter_data *data)
{
memset(data, 0, sizeof(*data));
data->cur_vif = cur_vif;
ieee80211_iterate_active_interfaces(hw,
wl12xx_vif_count_iter, data);
}
static int wl12xx_fetch_firmware(struct wl1271 *wl, bool plt)
{
const struct firmware *fw;
const char *fw_name;
enum wl12xx_fw_type fw_type;
int ret;
if (plt) {
fw_type = WL12XX_FW_TYPE_PLT;
fw_name = wl->plt_fw_name;
} else {
/*
* we can't call wl12xx_get_vif_count() here because
* wl->mutex is taken, so use the cached last_vif_count value
*/
if (wl->last_vif_count > 1) {
fw_type = WL12XX_FW_TYPE_MULTI;
fw_name = wl->mr_fw_name;
} else {
fw_type = WL12XX_FW_TYPE_NORMAL;
fw_name = wl->sr_fw_name;
}
}
if (wl->fw_type == fw_type)
return 0;
wl1271_debug(DEBUG_BOOT, "booting firmware %s", fw_name);
ret = request_firmware(&fw, fw_name, wl->dev);
if (ret < 0) {
wl1271_error("could not get firmware %s: %d", fw_name, ret);
return ret;
}
if (fw->size % 4) {
wl1271_error("firmware size is not multiple of 32 bits: %zu",
fw->size);
ret = -EILSEQ;
goto out;
}
vfree(wl->fw);
wl->fw_type = WL12XX_FW_TYPE_NONE;
wl->fw_len = fw->size;
wl->fw = vmalloc(wl->fw_len);
if (!wl->fw) {
wl1271_error("could not allocate memory for the firmware");
ret = -ENOMEM;
goto out;
}
memcpy(wl->fw, fw->data, wl->fw_len);
ret = 0;
wl->fw_type = fw_type;
out:
release_firmware(fw);
return ret;
}
static void wl1271_fetch_nvs(struct wl1271 *wl)
{
const struct firmware *fw;
int ret;
ret = request_firmware(&fw, WL12XX_NVS_NAME, wl->dev);
if (ret < 0) {
wl1271_debug(DEBUG_BOOT, "could not get nvs file %s: %d",
WL12XX_NVS_NAME, ret);
return;
}
wl->nvs = kmemdup(fw->data, fw->size, GFP_KERNEL);
if (!wl->nvs) {
wl1271_error("could not allocate memory for the nvs file");
goto out;
}
wl->nvs_len = fw->size;
out:
release_firmware(fw);
}
void wl12xx_queue_recovery_work(struct wl1271 *wl)
{
WARN_ON(!test_bit(WL1271_FLAG_INTENDED_FW_RECOVERY, &wl->flags));
/* Avoid a recursive recovery */
if (!test_and_set_bit(WL1271_FLAG_RECOVERY_IN_PROGRESS, &wl->flags)) {
wlcore_disable_interrupts_nosync(wl);
#ifdef CONFIG_HAS_WAKELOCK
/* give us a grace period for recovery */
wake_lock_timeout(&wl->recovery_wake, 5 * HZ);
#endif
ieee80211_queue_work(wl->hw, &wl->recovery_work);
}
}
size_t wl12xx_copy_fwlog(struct wl1271 *wl, u8 *memblock, size_t maxlen)
{
size_t len = 0;
/* The FW log is a length-value list, find where the log end */
while (len < maxlen) {
if (memblock[len] == 0)
break;
if (len + memblock[len] + 1 > maxlen)
break;
len += memblock[len] + 1;
}
/* Make sure we have enough room */
len = min(len, (size_t)(PAGE_SIZE - wl->fwlog_size));
/* Fill the FW log file, consumed by the sysfs fwlog entry */
memcpy(wl->fwlog + wl->fwlog_size, memblock, len);
wl->fwlog_size += len;
return len;
}
#define WLCORE_FW_LOG_END 0x2000000
static void wl12xx_read_fwlog_panic(struct wl1271 *wl)
{
u32 addr;
u32 offset;
u32 end_of_log;
u8 *block;
int ret;
if ((wl->quirks & WLCORE_QUIRK_FWLOG_NOT_IMPLEMENTED) ||
(wl->conf.fwlog.mem_blocks == 0))
return;
wl1271_info("Reading FW panic log");
block = kmalloc(WL12XX_HW_BLOCK_SIZE, GFP_KERNEL);
if (!block)
return;
/*
* Make sure the chip is awake and the logger isn't active.
* Do not send a stop fwlog command if the fw is hanged.
*/
if (wl1271_ps_elp_wakeup(wl))
goto out;
if (!wl->watchdog_recovery)
wl12xx_cmd_stop_fwlog(wl);
/* Read the first memory block address */
ret = wlcore_fw_status(wl, wl->fw_status_1, wl->fw_status_2);
if (ret < 0)
goto out;
addr = le32_to_cpu(wl->fw_status_2->log_start_addr);
if (!addr)
goto out;
if (wl->conf.fwlog.mode == WL12XX_FWLOG_CONTINUOUS) {
offset = sizeof(addr) + sizeof(struct wl1271_rx_descriptor);
end_of_log = WLCORE_FW_LOG_END;
} else {
offset = sizeof(addr);
end_of_log = addr;
}
/* Traverse the memory blocks linked list */
do {
memset(block, 0, WL12XX_HW_BLOCK_SIZE);
ret = wlcore_read_hwaddr(wl, addr, block, WL12XX_HW_BLOCK_SIZE,
false);
if (ret < 0)
goto out;
/*
* Memory blocks are linked to one another. The first 4 bytes
* of each memory block hold the hardware address of the next
* one. The last memory block points to the first one in
* on demand mode and is equal to 0x2000000 in continuous mode.
*/
addr = le32_to_cpup((__le32 *)block);
if (!wl12xx_copy_fwlog(wl, block + offset,
WL12XX_HW_BLOCK_SIZE - offset))
break;
} while (addr && (addr != end_of_log));
wake_up_interruptible(&wl->fwlog_waitq);
out:
kfree(block);
}
static void wlcore_print_recovery(struct wl1271 *wl)
{
u32 pc = 0;
u32 hint_sts = 0;
int ret;
wl1271_info("Hardware recovery in progress. FW ver: %s",
wl->chip.fw_ver_str);
/* change partitions momentarily so we can read the FW pc */
ret = wlcore_set_partition(wl, &wl->ptable[PART_BOOT]);
if (ret < 0)
return;
ret = wlcore_read_reg(wl, REG_PC_ON_RECOVERY, &pc);
if (ret < 0)
return;
ret = wlcore_read_reg(wl, REG_INTERRUPT_NO_CLEAR, &hint_sts);
if (ret < 0)
return;
wl1271_info("pc: 0x%x, hint_sts: 0x%08x", pc, hint_sts);
wlcore_set_partition(wl, &wl->ptable[PART_WORK]);
}
static void wl1271_recovery_work(struct work_struct *work)
{
struct wl1271 *wl =
container_of(work, struct wl1271, recovery_work);
struct wl12xx_vif *wlvif;
struct ieee80211_vif *vif;
mutex_lock(&wl->mutex);
if (wl->state != WL1271_STATE_ON || wl->plt)
goto out_unlock;
if (!test_bit(WL1271_FLAG_INTENDED_FW_RECOVERY, &wl->flags)) {
wl12xx_read_fwlog_panic(wl);
wlcore_print_recovery(wl);
}
BUG_ON(bug_on_recovery &&
!test_bit(WL1271_FLAG_INTENDED_FW_RECOVERY, &wl->flags));
if (no_recovery) {
wl1271_info("No recovery (chosen on module load). Fw will remain stuck.");
goto out_unlock;
}
/*
* Advance security sequence number to overcome potential progress
* in the firmware during recovery. This doens't hurt if the network is
* not encrypted.
*/
wl12xx_for_each_wlvif(wl, wlvif) {
if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) ||
test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
wlvif->tx_security_seq +=
WL1271_TX_SQN_POST_RECOVERY_PADDING;
}
/* Prevent spurious TX during FW restart */
wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FW_RESTART);
if (wl->sched_scanning) {
ieee80211_sched_scan_stopped(wl->hw);
wl->sched_scanning = false;
}
/* reboot the chipset */
while (!list_empty(&wl->wlvif_list)) {
wlvif = list_first_entry(&wl->wlvif_list,
struct wl12xx_vif, list);
vif = wl12xx_wlvif_to_vif(wlvif);
__wl1271_op_remove_interface(wl, vif, false);
}
wlcore_op_stop_locked(wl);
ieee80211_restart_hw(wl->hw);
/*
* Its safe to enable TX now - the queues are stopped after a request
* to restart the HW.
*/
wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FW_RESTART);
out_unlock:
wl->watchdog_recovery = false;
clear_bit(WL1271_FLAG_RECOVERY_IN_PROGRESS, &wl->flags);
mutex_unlock(&wl->mutex);
}
static int wlcore_fw_wakeup(struct wl1271 *wl)
{
return wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
}
static int wl1271_setup(struct wl1271 *wl)
{
wl->fw_status_1 = kmalloc(WLCORE_FW_STATUS_1_LEN(wl->num_rx_desc) +
sizeof(*wl->fw_status_2) +
wl->fw_status_priv_len, GFP_KERNEL);
if (!wl->fw_status_1)
return -ENOMEM;
wl->fw_status_2 = (struct wl_fw_status_2 *)
(((u8 *) wl->fw_status_1) +