freebsd-dev/sys/dev/iwm/if_iwm_power.c
Adrian Chadd be793bcd46 [iwm] Make powersaving more similar to Linux iwlwifi behaviour.
* Add a per-vap ps_disabled flag, and use it for a workaround which fixes
  an association issue when powersaving is enabled.

* Compute flag that should correpsond to the mvmif->bss_conf.ps flag in
  Linux's iwlwifi (e.g. this disallows powersaving when not associated
  yet).

Inspired-By: Linux iwlwifi

Obtained from:	dragonflybsd.git dc2e69bdfe8c9d7049c8a28da0adffbfbc6de5c0
2017-05-12 06:31:57 +00:00

490 lines
14 KiB
C

/* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */
/*
* Copyright (c) 2014 genua mbh <info@genua.de>
* Copyright (c) 2014 Fixup Software Ltd.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*-
* Based on BSD-licensed source modules in the Linux iwlwifi driver,
* which were used as the reference documentation for this implementation.
*
* Driver version we are currently based off of is
* Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd)
*
***********************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License 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 Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*
* BSD LICENSE
*
* Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include "opt_iwm.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/endian.h>
#include <sys/firmware.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/linker.h>
#include <machine/bus.h>
#include <machine/endian.h>
#include <machine/resource.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
#include <net80211/ieee80211_ratectl.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/iwm/if_iwmreg.h>
#include <dev/iwm/if_iwmvar.h>
#include <dev/iwm/if_iwm_debug.h>
#include <dev/iwm/if_iwm_constants.h>
#include <dev/iwm/if_iwm_util.h>
#include <dev/iwm/if_iwm_power.h>
static int iwm_power_scheme = IWM_POWER_SCHEME_BPS;
TUNABLE_INT("hw.iwm.power_scheme", &iwm_power_scheme);
/*
* BEGIN mvm/power.c
*/
#define IWM_POWER_KEEP_ALIVE_PERIOD_SEC 25
static int
iwm_mvm_beacon_filter_send_cmd(struct iwm_softc *sc,
struct iwm_beacon_filter_cmd *cmd)
{
int ret;
ret = iwm_mvm_send_cmd_pdu(sc, IWM_REPLY_BEACON_FILTERING_CMD,
0, sizeof(struct iwm_beacon_filter_cmd), cmd);
if (!ret) {
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"ba_enable_beacon_abort is: %d\n",
le32toh(cmd->ba_enable_beacon_abort));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"ba_escape_timer is: %d\n",
le32toh(cmd->ba_escape_timer));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_debug_flag is: %d\n",
le32toh(cmd->bf_debug_flag));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_enable_beacon_filter is: %d\n",
le32toh(cmd->bf_enable_beacon_filter));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_energy_delta is: %d\n",
le32toh(cmd->bf_energy_delta));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_escape_timer is: %d\n",
le32toh(cmd->bf_escape_timer));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_roaming_energy_delta is: %d\n",
le32toh(cmd->bf_roaming_energy_delta));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_roaming_state is: %d\n",
le32toh(cmd->bf_roaming_state));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_temp_threshold is: %d\n",
le32toh(cmd->bf_temp_threshold));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_temp_fast_filter is: %d\n",
le32toh(cmd->bf_temp_fast_filter));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"bf_temp_slow_filter is: %d\n",
le32toh(cmd->bf_temp_slow_filter));
}
return ret;
}
static void
iwm_mvm_beacon_filter_set_cqm_params(struct iwm_softc *sc,
struct iwm_vap *ivp, struct iwm_beacon_filter_cmd *cmd)
{
cmd->ba_enable_beacon_abort = htole32(sc->sc_bf.ba_enabled);
}
static void
iwm_mvm_power_log(struct iwm_softc *sc, struct iwm_mac_power_cmd *cmd)
{
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Sending power table command on mac id 0x%X for "
"power level %d, flags = 0x%X\n",
cmd->id_and_color, iwm_power_scheme, le16toh(cmd->flags));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Keep alive = %u sec\n", le16toh(cmd->keep_alive_seconds));
if (!(cmd->flags & htole16(IWM_POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK))) {
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Disable power management\n");
return;
}
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Rx timeout = %u usec\n", le32toh(cmd->rx_data_timeout));
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Tx timeout = %u usec\n", le32toh(cmd->tx_data_timeout));
if (cmd->flags & htole16(IWM_POWER_FLAGS_SKIP_OVER_DTIM_MSK))
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"DTIM periods to skip = %u\n", cmd->skip_dtim_periods);
}
static boolean_t
iwm_mvm_power_is_radar(struct iwm_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211_channel *chan;
boolean_t radar_detect = FALSE;
chan = ic->ic_bsschan;
if (chan == IEEE80211_CHAN_ANYC ||
(chan->ic_flags & IEEE80211_CHAN_DFS) != 0) {
radar_detect = TRUE;
}
return radar_detect;
}
static void
iwm_mvm_power_config_skip_dtim(struct iwm_softc *sc,
struct iwm_mac_power_cmd *cmd)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
int dtimper = vap->iv_dtim_period ?: 1;
int skip;
/* disable, in case we're supposed to override */
cmd->skip_dtim_periods = 0;
cmd->flags &= ~htole16(IWM_POWER_FLAGS_SKIP_OVER_DTIM_MSK);
if (iwm_mvm_power_is_radar(sc))
return;
if (dtimper >= 10)
return;
/* TODO: check that multicast wake lock is off */
if (iwm_power_scheme != IWM_POWER_SCHEME_LP)
return;
skip = 2;
/* the firmware really expects "look at every X DTIMs", so add 1 */
cmd->skip_dtim_periods = 1 + skip;
cmd->flags |= htole16(IWM_POWER_FLAGS_SKIP_OVER_DTIM_MSK);
}
static void
iwm_mvm_power_build_cmd(struct iwm_softc *sc, struct iwm_vap *ivp,
struct iwm_mac_power_cmd *cmd)
{
struct ieee80211vap *vap = &ivp->iv_vap;
struct ieee80211_node *ni = vap->iv_bss;
int dtimper, dtimper_msec;
int keep_alive;
boolean_t bss_conf_ps = FALSE;
cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id,
ivp->color));
dtimper = vap->iv_dtim_period ?: 1;
/*
* Regardless of power management state the driver must set
* keep alive period. FW will use it for sending keep alive NDPs
* immediately after association. Check that keep alive period
* is at least 3 * DTIM
*/
dtimper_msec = dtimper * ni->ni_intval;
keep_alive
= imax(3 * dtimper_msec, 1000 * IWM_POWER_KEEP_ALIVE_PERIOD_SEC);
keep_alive = roundup(keep_alive, 1000) / 1000;
cmd->keep_alive_seconds = htole16(keep_alive);
if (sc->sc_ps_disabled)
return;
cmd->flags |= htole16(IWM_POWER_FLAGS_POWER_SAVE_ENA_MSK);
if (IWM_NODE(ni)->in_assoc &&
(vap->iv_flags & IEEE80211_F_PMGTON) != 0) {
bss_conf_ps = TRUE;
}
if (!bss_conf_ps)
return;
cmd->flags |= htole16(IWM_POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
iwm_mvm_power_config_skip_dtim(sc, cmd);
cmd->rx_data_timeout =
htole32(IWM_MVM_DEFAULT_PS_RX_DATA_TIMEOUT);
cmd->tx_data_timeout =
htole32(IWM_MVM_DEFAULT_PS_TX_DATA_TIMEOUT);
}
static int
iwm_mvm_power_send_cmd(struct iwm_softc *sc, struct iwm_vap *ivp)
{
struct iwm_mac_power_cmd cmd = {};
iwm_mvm_power_build_cmd(sc, ivp, &cmd);
iwm_mvm_power_log(sc, &cmd);
return iwm_mvm_send_cmd_pdu(sc, IWM_MAC_PM_POWER_TABLE, 0,
sizeof(cmd), &cmd);
}
static int
_iwm_mvm_enable_beacon_filter(struct iwm_softc *sc, struct iwm_vap *ivp,
struct iwm_beacon_filter_cmd *cmd)
{
int ret;
iwm_mvm_beacon_filter_set_cqm_params(sc, ivp, cmd);
ret = iwm_mvm_beacon_filter_send_cmd(sc, cmd);
if (!ret)
sc->sc_bf.bf_enabled = 1;
return ret;
}
int
iwm_mvm_enable_beacon_filter(struct iwm_softc *sc, struct iwm_vap *ivp)
{
struct iwm_beacon_filter_cmd cmd = {
IWM_BF_CMD_CONFIG_DEFAULTS,
.bf_enable_beacon_filter = htole32(1),
};
return _iwm_mvm_enable_beacon_filter(sc, ivp, &cmd);
}
int
iwm_mvm_disable_beacon_filter(struct iwm_softc *sc)
{
struct iwm_beacon_filter_cmd cmd = {};
int ret;
ret = iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
if (ret == 0)
sc->sc_bf.bf_enabled = 0;
return ret;
}
static int
iwm_mvm_power_set_ps(struct iwm_softc *sc)
{
struct ieee80211vap *vap;
boolean_t disable_ps;
int ret;
/* disable PS if CAM */
disable_ps = (iwm_power_scheme == IWM_POWER_SCHEME_CAM);
/* ...or if any of the vifs require PS to be off */
TAILQ_FOREACH(vap, &sc->sc_ic.ic_vaps, iv_next) {
struct iwm_vap *ivp = IWM_VAP(vap);
if (ivp->phy_ctxt != NULL && ivp->ps_disabled)
disable_ps = TRUE;
}
/* update device power state if it has changed */
if (sc->sc_ps_disabled != disable_ps) {
boolean_t old_ps_disabled = sc->sc_ps_disabled;
sc->sc_ps_disabled = disable_ps;
ret = iwm_mvm_power_update_device(sc);
if (ret) {
sc->sc_ps_disabled = old_ps_disabled;
return ret;
}
}
return 0;
}
static int
iwm_mvm_power_set_ba(struct iwm_softc *sc, struct iwm_vap *ivp)
{
struct iwm_beacon_filter_cmd cmd = {
IWM_BF_CMD_CONFIG_DEFAULTS,
.bf_enable_beacon_filter = htole32(1),
};
struct ieee80211vap *vap = &ivp->iv_vap;
struct ieee80211_node *ni = vap->iv_bss;
boolean_t bss_conf_ps = FALSE;
if (!sc->sc_bf.bf_enabled)
return 0;
if (ni != NULL && IWM_NODE(ni)->in_assoc &&
(vap->iv_flags & IEEE80211_F_PMGTON) != 0) {
bss_conf_ps = TRUE;
}
sc->sc_bf.ba_enabled = !sc->sc_ps_disabled && bss_conf_ps;
return _iwm_mvm_enable_beacon_filter(sc, ivp, &cmd);
}
int
iwm_mvm_power_update_ps(struct iwm_softc *sc)
{
struct ieee80211vap *vap = TAILQ_FIRST(&sc->sc_ic.ic_vaps);
int ret;
ret = iwm_mvm_power_set_ps(sc);
if (ret)
return ret;
if (vap != NULL)
return iwm_mvm_power_set_ba(sc, IWM_VAP(vap));
return 0;
}
int
iwm_mvm_power_update_mac(struct iwm_softc *sc)
{
struct ieee80211vap *vap = TAILQ_FIRST(&sc->sc_ic.ic_vaps);
int ret;
ret = iwm_mvm_power_set_ps(sc);
if (ret)
return ret;
if (vap != NULL) {
ret = iwm_mvm_power_send_cmd(sc, IWM_VAP(vap));
if (ret)
return ret;
}
if (vap != NULL)
return iwm_mvm_power_set_ba(sc, IWM_VAP(vap));
return 0;
}
int
iwm_mvm_power_update_device(struct iwm_softc *sc)
{
struct iwm_device_power_cmd cmd = {
.flags = 0,
};
if (iwm_power_scheme == IWM_POWER_SCHEME_CAM)
sc->sc_ps_disabled = TRUE;
if (!sc->sc_ps_disabled)
cmd.flags |= htole16(IWM_DEVICE_POWER_FLAGS_POWER_SAVE_ENA_MSK);
IWM_DPRINTF(sc, IWM_DEBUG_PWRSAVE | IWM_DEBUG_CMD,
"Sending device power command with flags = 0x%X\n", cmd.flags);
return iwm_mvm_send_cmd_pdu(sc,
IWM_POWER_TABLE_CMD, 0, sizeof(cmd), &cmd);
}