freebsd-dev/sys/dev/iwm/if_iwm_sta.c
Adrian Chadd 7a3e63e7b3 [iwm] Cleanup mbufq draining. Add iwm_xmit_queue_drain() like in iwn(4).
* iwm_xmit_queue_drain() calls ieee80211_free_node(), removing a possible
  memory leak, compared to using just mbufq_drain().

* Remove duplicate mbufq_drain() from iwm_mvm_rm_sta(), this should be
  handled in the caller.

Obtained from:	dragonflybsd.git 339d45fda40072e0aca5ece639173204716f11fe
2017-07-26 05:29:08 +00:00

384 lines
10 KiB
C

/*-
* 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_vap *ivp, boolean_t drain)
{
struct iwm_mvm_add_sta_cmd cmd = {};
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,
boolean_t is_assoc)
{
uint32_t tfd_queue_msk = 0;
int ret;
int ac;
ret = iwm_mvm_drain_sta(sc, IWM_VAP(vap), TRUE);
if (ret)
return ret;
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, IWM_VAP(vap), FALSE);
/* if we are associated - we can't remove the AP STA now */
if (is_assoc)
return ret;
/* XXX wait until STA is drained */
ret = iwm_mvm_rm_sta_common(sc);
return ret;
}
int
iwm_mvm_rm_sta_id(struct iwm_softc *sc, struct ieee80211vap *vap)
{
/* XXX wait until STA is drained */
return iwm_mvm_rm_sta_common(sc);
}
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;
}