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[iwm] Factor out firmware station handling into if_iwm_sta.c.

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* This adds iwm_mvm_rm_sta(), which will be used to tear down firmware
  state for better/cleaner iwm_newstate() handling.

* Makes iwm_enable_txq() and iwm_mvm_flush_tx_path() non-static, add
  the declarations to if_iwm_util.h for now.

Obtained from:	dragonflybsd.git 85d1c6190c4c3564b1a347f253e823aa95c202b2
This commit is contained in:
adrian 2017-05-12 06:03:23 +00:00
parent 0ec3dbd735
commit 2b323c51a9
6 changed files with 608 additions and 148 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/conf/files
View File

@ -1855,6 +1855,7 @@ dev/iwm/if_iwm_phy_ctxt.c optional iwm
dev/iwm/if_iwm_phy_db.c optional iwm
dev/iwm/if_iwm_power.c optional iwm
dev/iwm/if_iwm_scan.c optional iwm
dev/iwm/if_iwm_sta.c optional iwm
dev/iwm/if_iwm_time_event.c optional iwm
dev/iwm/if_iwm_util.c optional iwm
iwm3160fw.c optional iwm3160fw | iwmfw \

148
sys/dev/iwm/if_iwm.c
View File

@ -164,6 +164,7 @@ __FBSDID("$FreeBSD$");
#include <dev/iwm/if_iwm_time_event.h>
#include <dev/iwm/if_iwm_power.h>
#include <dev/iwm/if_iwm_scan.h>
#include <dev/iwm/if_iwm_sta.h>
#include <dev/iwm/if_iwm_pcie_trans.h>
#include <dev/iwm/if_iwm_led.h>
@ -265,7 +266,6 @@ static void iwm_mvm_nic_config(struct iwm_softc *);
static int iwm_nic_rx_init(struct iwm_softc *);
static int iwm_nic_tx_init(struct iwm_softc *);
static int iwm_nic_init(struct iwm_softc *);
static int iwm_enable_txq(struct iwm_softc *, int, int, int);
static int iwm_trans_pcie_fw_alive(struct iwm_softc *, uint32_t);
static int iwm_nvm_read_chunk(struct iwm_softc *, uint16_t, uint16_t,
uint16_t, uint8_t *, uint16_t *);
@ -344,19 +344,6 @@ static int iwm_tx(struct iwm_softc *, struct mbuf *,
struct ieee80211_node *, int);
static int iwm_raw_xmit(struct ieee80211_node *, struct mbuf *,
const struct ieee80211_bpf_params *);
static int iwm_mvm_flush_tx_path(struct iwm_softc *sc,
uint32_t tfd_msk, uint32_t flags);
static int iwm_mvm_send_add_sta_cmd_status(struct iwm_softc *,
struct iwm_mvm_add_sta_cmd *,
int *);
static int iwm_mvm_sta_send_to_fw(struct iwm_softc *, struct iwm_node *,
int);
static int iwm_mvm_add_sta(struct iwm_softc *, struct iwm_node *);
static int iwm_mvm_update_sta(struct iwm_softc *, struct iwm_node *);
static int iwm_mvm_add_int_sta_common(struct iwm_softc *,
struct iwm_int_sta *,
const uint8_t *, uint16_t, uint16_t);
static int iwm_mvm_add_aux_sta(struct iwm_softc *);
static int iwm_mvm_update_quotas(struct iwm_softc *, struct iwm_vap *);
static int iwm_auth(struct ieee80211vap *, struct iwm_softc *);
static int iwm_release(struct iwm_softc *, struct iwm_node *);
@ -1532,7 +1519,7 @@ iwm_nic_init(struct iwm_softc *sc)
return 0;
}
static int
int
iwm_enable_txq(struct iwm_softc *sc, int sta_id, int qid, int fifo)
{
if (!iwm_nic_lock(sc)) {
@ -3883,137 +3870,6 @@ iwm_mvm_flush_tx_path(struct iwm_softc *sc, uint32_t tfd_msk, uint32_t flags)
return ret;
}
/*
* BEGIN mvm/sta.c
*/
static int
iwm_mvm_send_add_sta_cmd_status(struct iwm_softc *sc,
struct iwm_mvm_add_sta_cmd *cmd, int *status)
{
return iwm_mvm_send_cmd_pdu_status(sc, IWM_ADD_STA, sizeof(*cmd),
cmd, status);
}
/* send station add/update command to firmware */
static int
iwm_mvm_sta_send_to_fw(struct iwm_softc *sc, struct iwm_node *in, int update)
{
struct iwm_vap *ivp = IWM_VAP(in->in_ni.ni_vap);
struct iwm_mvm_add_sta_cmd add_sta_cmd;
int ret;
uint32_t status;
memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
add_sta_cmd.sta_id = IWM_STATION_ID;
add_sta_cmd.mac_id_n_color
= htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color));
if (!update) {
int ac;
for (ac = 0; ac < WME_NUM_AC; ac++) {
add_sta_cmd.tfd_queue_msk |=
htole32(1 << iwm_mvm_ac_to_tx_fifo[ac]);
}
IEEE80211_ADDR_COPY(&add_sta_cmd.addr, in->in_ni.ni_bssid);
}
add_sta_cmd.add_modify = update ? 1 : 0;
add_sta_cmd.station_flags_msk
|= htole32(IWM_STA_FLG_FAT_EN_MSK | IWM_STA_FLG_MIMO_EN_MSK);
add_sta_cmd.tid_disable_tx = htole16(0xffff);
if (update)
add_sta_cmd.modify_mask |= (IWM_STA_MODIFY_TID_DISABLE_TX);
status = IWM_ADD_STA_SUCCESS;
ret = iwm_mvm_send_add_sta_cmd_status(sc, &add_sta_cmd, &status);
if (ret)
return ret;
switch (status & IWM_ADD_STA_STATUS_MASK) {
case IWM_ADD_STA_SUCCESS:
break;
default:
ret = EIO;
device_printf(sc->sc_dev, "IWM_ADD_STA failed\n");
break;
}
return ret;
}
static int
iwm_mvm_add_sta(struct iwm_softc *sc, struct iwm_node *in)
{
return iwm_mvm_sta_send_to_fw(sc, in, 0);
}
static int
iwm_mvm_update_sta(struct iwm_softc *sc, struct iwm_node *in)
{
return iwm_mvm_sta_send_to_fw(sc, in, 1);
}
static int
iwm_mvm_add_int_sta_common(struct iwm_softc *sc, struct iwm_int_sta *sta,
const uint8_t *addr, uint16_t mac_id, uint16_t color)
{
struct iwm_mvm_add_sta_cmd cmd;
int ret;
uint32_t status;
memset(&cmd, 0, sizeof(cmd));
cmd.sta_id = sta->sta_id;
cmd.mac_id_n_color = htole32(IWM_FW_CMD_ID_AND_COLOR(mac_id, color));
cmd.tfd_queue_msk = htole32(sta->tfd_queue_msk);
cmd.tid_disable_tx = htole16(0xffff);
if (addr)
IEEE80211_ADDR_COPY(cmd.addr, addr);
ret = iwm_mvm_send_add_sta_cmd_status(sc, &cmd, &status);
if (ret)
return ret;
switch (status & IWM_ADD_STA_STATUS_MASK) {
case IWM_ADD_STA_SUCCESS:
IWM_DPRINTF(sc, IWM_DEBUG_RESET,
"%s: Internal station added.\n", __func__);
return 0;
default:
device_printf(sc->sc_dev,
"%s: Add internal station failed, status=0x%x\n",
__func__, status);
ret = EIO;
break;
}
return ret;
}
static int
iwm_mvm_add_aux_sta(struct iwm_softc *sc)
{
int ret;
sc->sc_aux_sta.sta_id = IWM_AUX_STA_ID;
sc->sc_aux_sta.tfd_queue_msk = (1 << IWM_MVM_AUX_QUEUE);
ret = iwm_enable_txq(sc, 0, IWM_MVM_AUX_QUEUE, IWM_MVM_TX_FIFO_MCAST);
if (ret)
return ret;
ret = iwm_mvm_add_int_sta_common(sc,
&sc->sc_aux_sta, NULL, IWM_MAC_INDEX_AUX, 0);
if (ret)
memset(&sc->sc_aux_sta, 0, sizeof(sc->sc_aux_sta));
return ret;
}
/*
* END mvm/sta.c
*/
/*
* BEGIN mvm/quota.c
*/

378
sys/dev/iwm/if_iwm_sta.c Normal file
View File

@ -0,0 +1,378 @@
/*-
* 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 4.7.3 (tag id d7f6728f57e3ecbb7ef34eb7d9f564d514775d75)
*
***********************************************************************
*
* 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) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
*
* 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 <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
* 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_config.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_mac_ctxt.h>
#include <dev/iwm/if_iwm_sta.h>
/*
* New version of ADD_STA_sta command added new fields at the end of the
* structure, so sending the size of the relevant API's structure is enough to
* support both API versions.
*/
static inline int
iwm_mvm_add_sta_cmd_size(struct iwm_softc *sc)
{
#ifdef notyet
return iwm_mvm_has_new_rx_api(mvm) ?
sizeof(struct iwm_mvm_add_sta_cmd) :
sizeof(struct iwm_mvm_add_sta_cmd_v7);
#else
return sizeof(struct iwm_mvm_add_sta_cmd);
#endif
}
/* send station add/update command to firmware */
int
iwm_mvm_sta_send_to_fw(struct iwm_softc *sc, struct iwm_node *in,
boolean_t update)
{
struct iwm_vap *ivp = IWM_VAP(in->in_ni.ni_vap);
struct iwm_mvm_add_sta_cmd add_sta_cmd = {
.sta_id = IWM_STATION_ID,
.mac_id_n_color =
htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color)),
.add_modify = update ? 1 : 0,
.station_flags_msk = htole32(IWM_STA_FLG_FAT_EN_MSK |
IWM_STA_FLG_MIMO_EN_MSK),
.tid_disable_tx = htole16(0xffff),
};
int ret;
uint32_t status;
uint32_t agg_size = 0, mpdu_dens = 0;
if (!update) {
int ac;
for (ac = 0; ac < WME_NUM_AC; ac++) {
add_sta_cmd.tfd_queue_msk |=
htole32(1 << iwm_mvm_ac_to_tx_fifo[ac]);
}
IEEE80211_ADDR_COPY(&add_sta_cmd.addr, in->in_ni.ni_bssid);
}
add_sta_cmd.station_flags |=
htole32(agg_size << IWM_STA_FLG_MAX_AGG_SIZE_SHIFT);
add_sta_cmd.station_flags |=
htole32(mpdu_dens << IWM_STA_FLG_AGG_MPDU_DENS_SHIFT);
status = IWM_ADD_STA_SUCCESS;
ret = iwm_mvm_send_cmd_pdu_status(sc, IWM_ADD_STA,
iwm_mvm_add_sta_cmd_size(sc),
&add_sta_cmd, &status);
if (ret)
return ret;
switch (status & IWM_ADD_STA_STATUS_MASK) {
case IWM_ADD_STA_SUCCESS:
IWM_DPRINTF(sc, IWM_DEBUG_NODE, "IWM_ADD_STA PASSED\n");
break;
default:
ret = EIO;
device_printf(sc->sc_dev, "IWM_ADD_STA failed\n");
break;
}
return ret;
}
int
iwm_mvm_add_sta(struct iwm_softc *sc, struct iwm_node *in)
{
return iwm_mvm_sta_send_to_fw(sc, in, FALSE);
}
int
iwm_mvm_update_sta(struct iwm_softc *sc, struct iwm_node *in)
{
return iwm_mvm_sta_send_to_fw(sc, in, TRUE);
}
int
iwm_mvm_drain_sta(struct iwm_softc *sc, struct iwm_node *in, boolean_t drain)
{
struct iwm_mvm_add_sta_cmd cmd = {};
struct iwm_vap *ivp = IWM_VAP(in->in_ni.ni_vap);
int ret;
uint32_t status;
cmd.mac_id_n_color =
htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color));
cmd.sta_id = IWM_STATION_ID;
cmd.add_modify = IWM_STA_MODE_MODIFY;
cmd.station_flags = drain ? htole32(IWM_STA_FLG_DRAIN_FLOW) : 0;
cmd.station_flags_msk = htole32(IWM_STA_FLG_DRAIN_FLOW);
status = IWM_ADD_STA_SUCCESS;
ret = iwm_mvm_send_cmd_pdu_status(sc, IWM_ADD_STA,
iwm_mvm_add_sta_cmd_size(sc),
&cmd, &status);
if (ret)
return ret;
switch (status & IWM_ADD_STA_STATUS_MASK) {
case IWM_ADD_STA_SUCCESS:
IWM_DPRINTF(sc, IWM_DEBUG_NODE,
"Frames for staid %d will drained in fw\n", IWM_STATION_ID);
break;
default:
ret = EIO;
device_printf(sc->sc_dev,
"Couldn't drain frames for staid %d\n", IWM_STATION_ID);
break;
}
return ret;
}
/*
* Remove a station from the FW table. Before sending the command to remove
* the station validate that the station is indeed known to the driver (sanity
* only).
*/
static int
iwm_mvm_rm_sta_common(struct iwm_softc *sc)
{
struct iwm_mvm_rm_sta_cmd rm_sta_cmd = {
.sta_id = IWM_STATION_ID,
};
int ret;
ret = iwm_mvm_send_cmd_pdu(sc, IWM_REMOVE_STA, 0,
sizeof(rm_sta_cmd), &rm_sta_cmd);
if (ret) {
device_printf(sc->sc_dev,
"Failed to remove station. Id=%d\n", IWM_STATION_ID);
return ret;
}
return 0;
}
int
iwm_mvm_rm_sta(struct iwm_softc *sc, struct ieee80211vap *vap,
struct iwm_node *in)
{
uint32_t tfd_queue_msk = 0;
int ret;
int ac;
ret = iwm_mvm_drain_sta(sc, in, TRUE);
if (ret)
return ret;
mbufq_drain(&sc->sc_snd); /* XXX needed ? */
for (ac = 0; ac < WME_NUM_AC; ac++) {
tfd_queue_msk |= htole32(1 << iwm_mvm_ac_to_tx_fifo[ac]);
}
ret = iwm_mvm_flush_tx_path(sc, tfd_queue_msk, 0);
if (ret)
return ret;
#ifdef notyet /* function not yet implemented */
ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
mvm_sta->tfd_queue_msk);
if (ret)
return ret;
#endif
ret = iwm_mvm_drain_sta(sc, in, FALSE);
#if 0
/* if we are associated - we can't remove the AP STA now */
if (sta->assoc)
return ret;
#endif
/* XXX wait until STA is drained */
ret = iwm_mvm_rm_sta_common(sc);
return ret;
}
static int
iwm_mvm_add_int_sta_common(struct iwm_softc *sc, struct iwm_int_sta *sta,
const uint8_t *addr, uint16_t mac_id, uint16_t color)
{
struct iwm_mvm_add_sta_cmd cmd;
int ret;
uint32_t status;
memset(&cmd, 0, sizeof(cmd));
cmd.sta_id = sta->sta_id;
cmd.mac_id_n_color = htole32(IWM_FW_CMD_ID_AND_COLOR(mac_id, color));
cmd.tfd_queue_msk = htole32(sta->tfd_queue_msk);
cmd.tid_disable_tx = htole16(0xffff);
if (addr)
IEEE80211_ADDR_COPY(cmd.addr, addr);
ret = iwm_mvm_send_cmd_pdu_status(sc, IWM_ADD_STA,
iwm_mvm_add_sta_cmd_size(sc),
&cmd, &status);
if (ret)
return ret;
switch (status & IWM_ADD_STA_STATUS_MASK) {
case IWM_ADD_STA_SUCCESS:
IWM_DPRINTF(sc, IWM_DEBUG_NODE, "Internal station added.\n");
return 0;
default:
ret = EIO;
device_printf(sc->sc_dev,
"Add internal station failed, status=0x%x\n", status);
break;
}
return ret;
}
int
iwm_mvm_add_aux_sta(struct iwm_softc *sc)
{
int ret;
sc->sc_aux_sta.sta_id = IWM_AUX_STA_ID;
sc->sc_aux_sta.tfd_queue_msk = (1 << IWM_MVM_AUX_QUEUE);
/* Map Aux queue to fifo - needs to happen before adding Aux station */
ret = iwm_enable_txq(sc, 0, IWM_MVM_AUX_QUEUE, IWM_MVM_TX_FIFO_MCAST);
if (ret)
return ret;
ret = iwm_mvm_add_int_sta_common(sc, &sc->sc_aux_sta, NULL,
IWM_MAC_INDEX_AUX, 0);
if (ret) {
memset(&sc->sc_aux_sta, 0, sizeof(sc->sc_aux_sta));
sc->sc_aux_sta.sta_id = IWM_MVM_STATION_COUNT;
}
return ret;
}
void iwm_mvm_del_aux_sta(struct iwm_softc *sc)
{
memset(&sc->sc_aux_sta, 0, sizeof(sc->sc_aux_sta));
sc->sc_aux_sta.sta_id = IWM_MVM_STATION_COUNT;
}

222
sys/dev/iwm/if_iwm_sta.h Normal file
View File

@ -0,0 +1,222 @@
/*-
* 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 4.7.3 (tag id d7f6728f57e3ecbb7ef34eb7d9f564d514775d75)
*
***********************************************************************
*
*
* 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) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
*
* 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 <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
* 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.
*
*****************************************************************************/
/* $FreeBSD$ */
#ifndef __IF_IWM_STA_H__
#define __IF_IWM_STA_H__
/**
* DOC: station table - introduction
*
* The station table is a list of data structure that reprensent the stations.
* In STA/P2P client mode, the driver will hold one station for the AP/ GO.
* In GO/AP mode, the driver will have as many stations as associated clients.
* All these stations are reflected in the fw's station table. The driver
* keeps the fw's station table up to date with the ADD_STA command. Stations
* can be removed by the REMOVE_STA command.
*
* All the data related to a station is held in the structure %iwl_mvm_sta
* which is embed in the mac80211's %ieee80211_sta (in the drv_priv) area.
* This data includes the index of the station in the fw, per tid information
* (sequence numbers, Block-ack state machine, etc...). The stations are
* created and deleted by the %sta_state callback from %ieee80211_ops.
*
* The driver holds a map: %fw_id_to_mac_id that allows to fetch a
* %ieee80211_sta (and the %iwl_mvm_sta embedded into it) based on a fw
* station index. That way, the driver is able to get the tid related data in
* O(1) in time sensitive paths (Tx / Tx response / BA notification). These
* paths are triggered by the fw, and the driver needs to get a pointer to the
* %ieee80211 structure. This map helps to get that pointer quickly.
*/
/**
* DOC: station table - locking
*
* As stated before, the station is created / deleted by mac80211's %sta_state
* callback from %ieee80211_ops which can sleep. The next paragraph explains
* the locking of a single stations, the next ones relates to the station
* table.
*
* The station holds the sequence number per tid. So this data needs to be
* accessed in the Tx path (which is softIRQ). It also holds the Block-Ack
* information (the state machine / and the logic that checks if the queues
* were drained), so it also needs to be accessible from the Tx response flow.
* In short, the station needs to be access from sleepable context as well as
* from tasklets, so the station itself needs a spinlock.
*
* The writers of %fw_id_to_mac_id map are serialized by the global mutex of
* the mvm op_mode. This is possible since %sta_state can sleep.
* The pointers in this map are RCU protected, hence we won't replace the
* station while we have Tx / Tx response / BA notification running.
*
* If a station is deleted while it still has packets in its A-MPDU queues,
* then the reclaim flow will notice that there is no station in the map for
* sta_id and it will dump the responses.
*/
/**
* DOC: station table - internal stations
*
* The FW needs a few internal stations that are not reflected in
* mac80211, such as broadcast station in AP / GO mode, or AUX sta for
* scanning and P2P device (during the GO negotiation).
* For these kind of stations we have %iwl_mvm_int_sta struct which holds the
* data relevant for them from both %iwl_mvm_sta and %ieee80211_sta.
* Usually the data for these stations is static, so no locking is required,
* and no TID data as this is also not needed.
* One thing to note, is that these stations have an ID in the fw, but not
* in mac80211. In order to "reserve" them a sta_id in %fw_id_to_mac_id
* we fill ERR_PTR(EINVAL) in this mapping and all other dereferencing of
* pointers from this mapping need to check that the value is not error
* or NULL.
*
* Currently there is only one auxiliary station for scanning, initialized
* on init.
*/
/**
* DOC: station table - AP Station in STA mode
*
* %iwl_mvm_vif includes the index of the AP station in the fw's STA table:
* %ap_sta_id. To get the point to the corresponding %ieee80211_sta,
* &fw_id_to_mac_id can be used. Due to the way the fw works, we must not remove
* the AP station from the fw before setting the MAC context as unassociated.
* Hence, %fw_id_to_mac_id[%ap_sta_id] will be NULLed when the AP station is
* removed by mac80211, but the station won't be removed in the fw until the
* VIF is set as unassociated. Then, %ap_sta_id will be invalidated.
*/
/**
* DOC: station table - Drain vs. Flush
*
* Flush means that all the frames in the SCD queue are dumped regardless the
* station to which they were sent. We do that when we disassociate and before
* we remove the STA of the AP. The flush can be done synchronously against the
* fw.
* Drain means that the fw will drop all the frames sent to a specific station.
* This is useful when a client (if we are IBSS / GO or AP) disassociates. In
* that case, we need to drain all the frames for that client from the AC queues
* that are shared with the other clients. Only then, we can remove the STA in
* the fw. In order to do so, we track the non-AMPDU packets for each station.
* If mac80211 removes a STA and if it still has non-AMPDU packets pending in
* the queues, we mark this station as %EBUSY in %fw_id_to_mac_id, and drop all
* the frames for this STA (%iwl_mvm_rm_sta). When the last frame is dropped
* (we know about it with its Tx response), we remove the station in fw and set
* it as %NULL in %fw_id_to_mac_id: this is the purpose of
* %iwl_mvm_sta_drained_wk.
*/
/**
* DOC: station table - fw restart
*
* When the fw asserts, or we have any other issue that requires to reset the
* driver, we require mac80211 to reconfigure the driver. Since the private
* data of the stations is embed in mac80211's %ieee80211_sta, that data will
* not be zeroed and needs to be reinitialized manually.
* %IWL_MVM_STATUS_IN_HW_RESTART is set during restart and that will hint us
* that we must not allocate a new sta_id but reuse the previous one. This
* means that the stations being re-added after the reset will have the same
* place in the fw as before the reset. We do need to zero the %fw_id_to_mac_id
* map, since the stations aren't in the fw any more. Internal stations that
* are not added by mac80211 will be re-added in the init flow that is called
* after the restart: mac80211 call's %iwl_mvm_mac_start which calls to
* %iwl_mvm_up.
*/
/**
* Send the STA info to the FW.
*
* @sc: the iwm_softc* to use
* @sta: the STA
* @update: this is true if the FW is being updated about a STA it already knows
* about. Otherwise (if this is a new STA), this should be false.
* @flags: if update==true, this marks what is being changed via ORs of values
* from enum iwm_sta_modify_flag. Otherwise, this is ignored.
*/
extern int iwm_mvm_sta_send_to_fw(struct iwm_softc *sc, struct iwm_node *in,
boolean_t update);
extern int iwm_mvm_add_sta(struct iwm_softc *sc, struct iwm_node *in);
extern int iwm_mvm_update_sta(struct iwm_softc *sc, struct iwm_node *in);
extern int iwm_mvm_rm_sta(struct iwm_softc *sc, struct ieee80211vap *vap,
struct iwm_node *in);
extern int iwm_mvm_add_aux_sta(struct iwm_softc *sc);
extern void iwm_mvm_del_aux_sta(struct iwm_softc *sc);
extern int iwm_mvm_drain_sta(struct iwm_softc *sc, struct iwm_node *in,
boolean_t drain);
#endif /* __IF_IWM_STA_H__ */

3
sys/dev/iwm/if_iwm_util.h
View File

@ -123,6 +123,9 @@ extern void iwm_dma_contig_free(struct iwm_dma_info *);
extern boolean_t iwm_mvm_rx_diversity_allowed(struct iwm_softc *sc);
extern uint8_t iwm_ridx2rate(struct ieee80211_rateset *rs, int ridx);
extern int iwm_enable_txq(struct iwm_softc *sc, int sta_id, int qid, int fifo);
extern int iwm_mvm_flush_tx_path(struct iwm_softc *sc, uint32_t tfd_msk,
uint32_t flags);
static inline uint8_t
iwm_mvm_get_valid_tx_ant(struct iwm_softc *sc)

4
sys/modules/iwm/Makefile
View File

@ -7,10 +7,10 @@ KMOD= if_iwm
SRCS= if_iwm.c if_iwm_binding.c if_iwm_util.c if_iwm_phy_db.c
SRCS+= if_iwm_mac_ctxt.c if_iwm_phy_ctxt.c if_iwm_time_event.c
SRCS+= if_iwm_power.c if_iwm_scan.c if_iwm_led.c if_iwm_notif_wait.c
SRCS+= if_iwm_7000.c if_iwm_8000.c if_iwm_fw.c
SRCS+= if_iwm_7000.c if_iwm_8000.c if_iwm_fw.c if_iwm_sta.c
# bus layer
SRCS+= if_iwm_pcie_trans.c
SRCS+= device_if.h bus_if.h pci_if.h opt_wlan.h
SRCS+= device_if.h bus_if.h pci_if.h opt_wlan.h opt_iwm.h
CFLAGS+= -DIWM_DEBUG