mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-08 07:36:43 +07:00
911373cca1
This avoids problems when building on SPARC targets due to the driver calling the bus abstraction layer 'sbus'. Not that any SBUS-sporting SPARC targets are likely to have an SDIO controller, but this is the correct thing to do. See http://kisskb.ellerman.id.au/kisskb/buildresult/8846508/ Signed-off-by: Solomon Peachy <pizza@shaftnet.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
368 lines
9.0 KiB
C
368 lines
9.0 KiB
C
/*
|
|
* Mac80211 power management API for ST-Ericsson CW1200 drivers
|
|
*
|
|
* Copyright (c) 2011, ST-Ericsson
|
|
* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/if_ether.h>
|
|
#include "cw1200.h"
|
|
#include "pm.h"
|
|
#include "sta.h"
|
|
#include "bh.h"
|
|
#include "hwbus.h"
|
|
|
|
#define CW1200_BEACON_SKIPPING_MULTIPLIER 3
|
|
|
|
struct cw1200_udp_port_filter {
|
|
struct wsm_udp_port_filter_hdr hdr;
|
|
/* Up to 4 filters are allowed. */
|
|
struct wsm_udp_port_filter filters[WSM_MAX_FILTER_ELEMENTS];
|
|
} __packed;
|
|
|
|
struct cw1200_ether_type_filter {
|
|
struct wsm_ether_type_filter_hdr hdr;
|
|
/* Up to 4 filters are allowed. */
|
|
struct wsm_ether_type_filter filters[WSM_MAX_FILTER_ELEMENTS];
|
|
} __packed;
|
|
|
|
static struct cw1200_udp_port_filter cw1200_udp_port_filter_on = {
|
|
.hdr.num = 2,
|
|
.filters = {
|
|
[0] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_OUT,
|
|
.type = WSM_FILTER_PORT_TYPE_DST,
|
|
.port = __cpu_to_le16(67), /* DHCP Bootps */
|
|
},
|
|
[1] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_OUT,
|
|
.type = WSM_FILTER_PORT_TYPE_DST,
|
|
.port = __cpu_to_le16(68), /* DHCP Bootpc */
|
|
},
|
|
}
|
|
};
|
|
|
|
static struct wsm_udp_port_filter_hdr cw1200_udp_port_filter_off = {
|
|
.num = 0,
|
|
};
|
|
|
|
#ifndef ETH_P_WAPI
|
|
#define ETH_P_WAPI 0x88B4
|
|
#endif
|
|
|
|
static struct cw1200_ether_type_filter cw1200_ether_type_filter_on = {
|
|
.hdr.num = 4,
|
|
.filters = {
|
|
[0] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_IN,
|
|
.type = __cpu_to_le16(ETH_P_IP),
|
|
},
|
|
[1] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_IN,
|
|
.type = __cpu_to_le16(ETH_P_PAE),
|
|
},
|
|
[2] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_IN,
|
|
.type = __cpu_to_le16(ETH_P_WAPI),
|
|
},
|
|
[3] = {
|
|
.action = WSM_FILTER_ACTION_FILTER_IN,
|
|
.type = __cpu_to_le16(ETH_P_ARP),
|
|
},
|
|
},
|
|
};
|
|
|
|
static struct wsm_ether_type_filter_hdr cw1200_ether_type_filter_off = {
|
|
.num = 0,
|
|
};
|
|
|
|
/* private */
|
|
struct cw1200_suspend_state {
|
|
unsigned long bss_loss_tmo;
|
|
unsigned long join_tmo;
|
|
unsigned long direct_probe;
|
|
unsigned long link_id_gc;
|
|
bool beacon_skipping;
|
|
u8 prev_ps_mode;
|
|
};
|
|
|
|
static void cw1200_pm_stay_awake_tmo(unsigned long arg)
|
|
{
|
|
/* XXX what's the point of this ? */
|
|
}
|
|
|
|
int cw1200_pm_init(struct cw1200_pm_state *pm,
|
|
struct cw1200_common *priv)
|
|
{
|
|
spin_lock_init(&pm->lock);
|
|
|
|
init_timer(&pm->stay_awake);
|
|
pm->stay_awake.data = (unsigned long)pm;
|
|
pm->stay_awake.function = cw1200_pm_stay_awake_tmo;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void cw1200_pm_deinit(struct cw1200_pm_state *pm)
|
|
{
|
|
del_timer_sync(&pm->stay_awake);
|
|
}
|
|
|
|
void cw1200_pm_stay_awake(struct cw1200_pm_state *pm,
|
|
unsigned long tmo)
|
|
{
|
|
long cur_tmo;
|
|
spin_lock_bh(&pm->lock);
|
|
cur_tmo = pm->stay_awake.expires - jiffies;
|
|
if (!timer_pending(&pm->stay_awake) || cur_tmo < (long)tmo)
|
|
mod_timer(&pm->stay_awake, jiffies + tmo);
|
|
spin_unlock_bh(&pm->lock);
|
|
}
|
|
|
|
static long cw1200_suspend_work(struct delayed_work *work)
|
|
{
|
|
int ret = cancel_delayed_work(work);
|
|
long tmo;
|
|
if (ret > 0) {
|
|
/* Timer is pending */
|
|
tmo = work->timer.expires - jiffies;
|
|
if (tmo < 0)
|
|
tmo = 0;
|
|
} else {
|
|
tmo = -1;
|
|
}
|
|
return tmo;
|
|
}
|
|
|
|
static int cw1200_resume_work(struct cw1200_common *priv,
|
|
struct delayed_work *work,
|
|
unsigned long tmo)
|
|
{
|
|
if ((long)tmo < 0)
|
|
return 1;
|
|
|
|
return queue_delayed_work(priv->workqueue, work, tmo);
|
|
}
|
|
|
|
int cw1200_can_suspend(struct cw1200_common *priv)
|
|
{
|
|
if (atomic_read(&priv->bh_rx)) {
|
|
wiphy_dbg(priv->hw->wiphy, "Suspend interrupted.\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cw1200_can_suspend);
|
|
|
|
int cw1200_wow_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
|
|
{
|
|
struct cw1200_common *priv = hw->priv;
|
|
struct cw1200_pm_state *pm_state = &priv->pm_state;
|
|
struct cw1200_suspend_state *state;
|
|
int ret;
|
|
|
|
spin_lock_bh(&pm_state->lock);
|
|
ret = timer_pending(&pm_state->stay_awake);
|
|
spin_unlock_bh(&pm_state->lock);
|
|
if (ret)
|
|
return -EAGAIN;
|
|
|
|
/* Do not suspend when datapath is not idle */
|
|
if (priv->tx_queue_stats.num_queued)
|
|
return -EBUSY;
|
|
|
|
/* Make sure there is no configuration requests in progress. */
|
|
if (!mutex_trylock(&priv->conf_mutex))
|
|
return -EBUSY;
|
|
|
|
/* Ensure pending operations are done.
|
|
* Note also that wow_suspend must return in ~2.5sec, before
|
|
* watchdog is triggered.
|
|
*/
|
|
if (priv->channel_switch_in_progress)
|
|
goto revert1;
|
|
|
|
/* Do not suspend when join is pending */
|
|
if (priv->join_pending)
|
|
goto revert1;
|
|
|
|
/* Do not suspend when scanning */
|
|
if (down_trylock(&priv->scan.lock))
|
|
goto revert1;
|
|
|
|
/* Lock TX. */
|
|
wsm_lock_tx_async(priv);
|
|
|
|
/* Wait to avoid possible race with bh code.
|
|
* But do not wait too long...
|
|
*/
|
|
if (wait_event_timeout(priv->bh_evt_wq,
|
|
!priv->hw_bufs_used, HZ / 10) <= 0)
|
|
goto revert2;
|
|
|
|
/* Set UDP filter */
|
|
wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_on.hdr);
|
|
|
|
/* Set ethernet frame type filter */
|
|
wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_on.hdr);
|
|
|
|
/* Allocate state */
|
|
state = kzalloc(sizeof(struct cw1200_suspend_state), GFP_KERNEL);
|
|
if (!state)
|
|
goto revert3;
|
|
|
|
/* Change to legacy PS while going to suspend */
|
|
if (!priv->vif->p2p &&
|
|
priv->join_status == CW1200_JOIN_STATUS_STA &&
|
|
priv->powersave_mode.mode != WSM_PSM_PS) {
|
|
state->prev_ps_mode = priv->powersave_mode.mode;
|
|
priv->powersave_mode.mode = WSM_PSM_PS;
|
|
cw1200_set_pm(priv, &priv->powersave_mode);
|
|
if (wait_event_interruptible_timeout(priv->ps_mode_switch_done,
|
|
!priv->ps_mode_switch_in_progress, 1*HZ) <= 0) {
|
|
goto revert3;
|
|
}
|
|
}
|
|
|
|
/* Store delayed work states. */
|
|
state->bss_loss_tmo =
|
|
cw1200_suspend_work(&priv->bss_loss_work);
|
|
state->join_tmo =
|
|
cw1200_suspend_work(&priv->join_timeout);
|
|
state->direct_probe =
|
|
cw1200_suspend_work(&priv->scan.probe_work);
|
|
state->link_id_gc =
|
|
cw1200_suspend_work(&priv->link_id_gc_work);
|
|
|
|
cancel_delayed_work_sync(&priv->clear_recent_scan_work);
|
|
atomic_set(&priv->recent_scan, 0);
|
|
|
|
/* Enable beacon skipping */
|
|
if (priv->join_status == CW1200_JOIN_STATUS_STA &&
|
|
priv->join_dtim_period &&
|
|
!priv->has_multicast_subscription) {
|
|
state->beacon_skipping = true;
|
|
wsm_set_beacon_wakeup_period(priv,
|
|
priv->join_dtim_period,
|
|
CW1200_BEACON_SKIPPING_MULTIPLIER * priv->join_dtim_period);
|
|
}
|
|
|
|
/* Stop serving thread */
|
|
if (cw1200_bh_suspend(priv))
|
|
goto revert4;
|
|
|
|
ret = timer_pending(&priv->mcast_timeout);
|
|
if (ret)
|
|
goto revert5;
|
|
|
|
/* Store suspend state */
|
|
pm_state->suspend_state = state;
|
|
|
|
/* Enable IRQ wake */
|
|
ret = priv->hwbus_ops->power_mgmt(priv->hwbus_priv, true);
|
|
if (ret) {
|
|
wiphy_err(priv->hw->wiphy,
|
|
"PM request failed: %d. WoW is disabled.\n", ret);
|
|
cw1200_wow_resume(hw);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Force resume if event is coming from the device. */
|
|
if (atomic_read(&priv->bh_rx)) {
|
|
cw1200_wow_resume(hw);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
return 0;
|
|
|
|
revert5:
|
|
WARN_ON(cw1200_bh_resume(priv));
|
|
revert4:
|
|
cw1200_resume_work(priv, &priv->bss_loss_work,
|
|
state->bss_loss_tmo);
|
|
cw1200_resume_work(priv, &priv->join_timeout,
|
|
state->join_tmo);
|
|
cw1200_resume_work(priv, &priv->scan.probe_work,
|
|
state->direct_probe);
|
|
cw1200_resume_work(priv, &priv->link_id_gc_work,
|
|
state->link_id_gc);
|
|
kfree(state);
|
|
revert3:
|
|
wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_off);
|
|
wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_off);
|
|
revert2:
|
|
wsm_unlock_tx(priv);
|
|
up(&priv->scan.lock);
|
|
revert1:
|
|
mutex_unlock(&priv->conf_mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
int cw1200_wow_resume(struct ieee80211_hw *hw)
|
|
{
|
|
struct cw1200_common *priv = hw->priv;
|
|
struct cw1200_pm_state *pm_state = &priv->pm_state;
|
|
struct cw1200_suspend_state *state;
|
|
|
|
state = pm_state->suspend_state;
|
|
pm_state->suspend_state = NULL;
|
|
|
|
/* Disable IRQ wake */
|
|
priv->hwbus_ops->power_mgmt(priv->hwbus_priv, false);
|
|
|
|
/* Scan.lock must be released before BH is resumed other way
|
|
* in case when BSS_LOST command arrived the processing of the
|
|
* command will be delayed.
|
|
*/
|
|
up(&priv->scan.lock);
|
|
|
|
/* Resume BH thread */
|
|
WARN_ON(cw1200_bh_resume(priv));
|
|
|
|
/* Restores previous PS mode */
|
|
if (!priv->vif->p2p && priv->join_status == CW1200_JOIN_STATUS_STA) {
|
|
priv->powersave_mode.mode = state->prev_ps_mode;
|
|
cw1200_set_pm(priv, &priv->powersave_mode);
|
|
}
|
|
|
|
if (state->beacon_skipping) {
|
|
wsm_set_beacon_wakeup_period(priv, priv->beacon_int *
|
|
priv->join_dtim_period >
|
|
MAX_BEACON_SKIP_TIME_MS ? 1 :
|
|
priv->join_dtim_period, 0);
|
|
state->beacon_skipping = false;
|
|
}
|
|
|
|
/* Resume delayed work */
|
|
cw1200_resume_work(priv, &priv->bss_loss_work,
|
|
state->bss_loss_tmo);
|
|
cw1200_resume_work(priv, &priv->join_timeout,
|
|
state->join_tmo);
|
|
cw1200_resume_work(priv, &priv->scan.probe_work,
|
|
state->direct_probe);
|
|
cw1200_resume_work(priv, &priv->link_id_gc_work,
|
|
state->link_id_gc);
|
|
|
|
/* Remove UDP port filter */
|
|
wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_off);
|
|
|
|
/* Remove ethernet frame type filter */
|
|
wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_off);
|
|
|
|
/* Unlock datapath */
|
|
wsm_unlock_tx(priv);
|
|
|
|
/* Unlock configuration mutex */
|
|
mutex_unlock(&priv->conf_mutex);
|
|
|
|
/* Free memory */
|
|
kfree(state);
|
|
|
|
return 0;
|
|
}
|