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freebsd-nq/sys/dev/iwm/if_iwm_power.c
Gleb Smirnoff 7a79cebfba Replay r286410. Change KPI of how device drivers that provide wireless 
connectivity interact with the net80211 stack.

Historical background: originally wireless devices created an interface,
just like Ethernet devices do. Name of an interface matched the name of
the driver that created. Later, wlan(4) layer was introduced, and the
wlanX interfaces become the actual interface, leaving original ones as
"a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer
and a driver became a mix of methods that pass a pointer to struct ifnet
as identifier and methods that pass pointer to struct ieee80211com. From
user point of view, the parent interface just hangs on in the ifconfig
list, and user can't do anything useful with it.

Now, the struct ifnet goes away. The struct ieee80211com is the only
KPI between a device driver and net80211. Details:

- The struct ieee80211com is embedded into drivers softc.
- Packets are sent via new ic_transmit method, which is very much like
  the previous if_transmit.
- Bringing parent up/down is done via new ic_parent method, which notifies
  driver about any changes: number of wlan(4) interfaces, number of them
  in promisc or allmulti state.
- Device specific ioctls (if any) are received on new ic_ioctl method.
- Packets/errors accounting are done by the stack. In certain cases, when
  driver experiences errors and can not attribute them to any specific
  interface, driver updates ic_oerrors or ic_ierrors counters.

Details on interface configuration with new world order:
- A sequence of commands needed to bring up wireless DOESN"T change.
- /etc/rc.conf parameters DON'T change.
- List of devices that can be used to create wlan(4) interfaces is
  now provided by net.wlan.devices sysctl.

Most drivers in this change were converted by me, except of wpi(4),
that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing
changes to at least 8 drivers. Thanks to pluknet@, Oliver Hartmann,
Olivier Cochard, gjb@, mmoll@, op@ and lev@, who also participated in
testing.

Reviewed by:	adrian
Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2015-08-27 08:56:39 +00:00

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/* $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 <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_util.h>
#include <dev/iwm/if_iwm_power.h>
/*
* 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,
IWM_CMD_SYNC, 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_node *in, struct iwm_beacon_filter_cmd *cmd)
{
cmd->ba_enable_beacon_abort = htole32(sc->sc_bf.ba_enabled);
}
static int
iwm_mvm_update_beacon_abort(struct iwm_softc *sc, struct iwm_node *in,
int enable)
{
struct iwm_beacon_filter_cmd cmd = {
IWM_BF_CMD_CONFIG_DEFAULTS,
.bf_enable_beacon_filter = htole32(1),
.ba_enable_beacon_abort = htole32(enable),
};
if (!sc->sc_bf.bf_enabled)
return 0;
sc->sc_bf.ba_enabled = enable;
iwm_mvm_beacon_filter_set_cqm_params(sc, in, &cmd);
return iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
}
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_CAM, 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;
}
KASSERT(0, ("unhandled power management"));
#if 0
DPRINTF(mvm, "Rx timeout = %u usec\n",
le32_to_cpu(cmd->rx_data_timeout));
DPRINTF(mvm, "Tx timeout = %u usec\n",
le32_to_cpu(cmd->tx_data_timeout));
if (cmd->flags & cpu_to_le16(IWM_POWER_FLAGS_SKIP_OVER_DTIM_MSK))
DPRINTF(mvm, "DTIM periods to skip = %u\n",
cmd->skip_dtim_periods);
if (cmd->flags & cpu_to_le16(IWM_POWER_FLAGS_LPRX_ENA_MSK))
DPRINTF(mvm, "LP RX RSSI threshold = %u\n",
cmd->lprx_rssi_threshold);
if (cmd->flags & cpu_to_le16(IWM_POWER_FLAGS_ADVANCE_PM_ENA_MSK)) {
DPRINTF(mvm, "uAPSD enabled\n");
DPRINTF(mvm, "Rx timeout (uAPSD) = %u usec\n",
le32_to_cpu(cmd->rx_data_timeout_uapsd));
DPRINTF(mvm, "Tx timeout (uAPSD) = %u usec\n",
le32_to_cpu(cmd->tx_data_timeout_uapsd));
DPRINTF(mvm, "QNDP TID = %d\n", cmd->qndp_tid);
DPRINTF(mvm, "ACs flags = 0x%x\n", cmd->uapsd_ac_flags);
DPRINTF(mvm, "Max SP = %d\n", cmd->uapsd_max_sp);
}
#endif
}
static void
iwm_mvm_power_build_cmd(struct iwm_softc *sc, struct iwm_node *in,
struct iwm_mac_power_cmd *cmd)
{
struct ieee80211_node *ni = &in->in_ni;
int dtimper, dtimper_msec;
int keep_alive;
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
cmd->id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(IWM_DEFAULT_MACID,
IWM_DEFAULT_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
= MAX(3 * dtimper_msec, 1000 * IWM_POWER_KEEP_ALIVE_PERIOD_SEC);
keep_alive = roundup(keep_alive, 1000) / 1000;
cmd->keep_alive_seconds = htole16(keep_alive);
}
int
iwm_mvm_power_mac_update_mode(struct iwm_softc *sc, struct iwm_node *in)
{
int ret;
int ba_enable;
struct iwm_mac_power_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
iwm_mvm_power_build_cmd(sc, in, &cmd);
iwm_mvm_power_log(sc, &cmd);
if ((ret = iwm_mvm_send_cmd_pdu(sc, IWM_MAC_PM_POWER_TABLE,
IWM_CMD_SYNC, sizeof(cmd), &cmd)) != 0)
return ret;
ba_enable = !!(cmd.flags &
htole16(IWM_POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
return iwm_mvm_update_beacon_abort(sc, in, ba_enable);
}
int
iwm_mvm_power_update_device(struct iwm_softc *sc)
{
struct iwm_device_power_cmd cmd = {
.flags = htole16(IWM_DEVICE_POWER_FLAGS_POWER_SAVE_ENA_MSK),
};
if (!(sc->sc_capaflags & IWM_UCODE_TLV_FLAGS_DEVICE_PS_CMD))
return 0;
cmd.flags |= htole16(IWM_DEVICE_POWER_FLAGS_CAM_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, IWM_CMD_SYNC, sizeof(cmd), &cmd);
}
int
iwm_mvm_enable_beacon_filter(struct iwm_softc *sc, struct iwm_node *in)
{
struct iwm_beacon_filter_cmd cmd = {
IWM_BF_CMD_CONFIG_DEFAULTS,
.bf_enable_beacon_filter = htole32(1),
};
int ret;
iwm_mvm_beacon_filter_set_cqm_params(sc, in, &cmd);
ret = iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
if (ret == 0)
sc->sc_bf.bf_enabled = 1;
return ret;
}
int
iwm_mvm_disable_beacon_filter(struct iwm_softc *sc)
{
struct iwm_beacon_filter_cmd cmd;
int ret;
memset(&cmd, 0, sizeof(cmd));
if ((sc->sc_capaflags & IWM_UCODE_TLV_FLAGS_BF_UPDATED) == 0)
return 0;
ret = iwm_mvm_beacon_filter_send_cmd(sc, &cmd);
if (ret == 0)
sc->sc_bf.bf_enabled = 0;
return ret;
}
#if 0
static int
iwm_mvm_update_beacon_filter(struct iwm_softc *sc, struct iwm_node *in)
{
if (!sc->sc_bf.bf_enabled)
return 0;
return iwm_mvm_enable_beacon_filter(sc, in);
}
#endif
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