/* $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.
*/
/*-
* Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: releng/12.0/sys/dev/iwm/if_iwm_scan.c 321507 2017-07-26 05:26:01Z adrian $");
#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_notif_wait.h>
#include <dev/iwm/if_iwm_util.h>
#include <dev/iwm/if_iwm_scan.h>
/*
* BEGIN mvm/scan.c
*/
#define IWM_DENSE_EBS_SCAN_RATIO 5
#define IWM_SPARSE_EBS_SCAN_RATIO 1
static uint16_t
iwm_mvm_scan_rx_chain(struct iwm_softc *sc)
{
uint16_t rx_chain;
uint8_t rx_ant;
rx_ant = iwm_mvm_get_valid_rx_ant(sc);
rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS;
rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS;
rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS;
return htole16(rx_chain);
}
static uint32_t
iwm_mvm_scan_rxon_flags(struct ieee80211_channel *c)
{
if (IEEE80211_IS_CHAN_2GHZ(c))
return htole32(IWM_PHY_BAND_24);
else
return htole32(IWM_PHY_BAND_5);
}
static uint32_t
iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck)
{
uint32_t tx_ant;
int i, ind;
for (i = 0, ind = sc->sc_scan_last_antenna;
i < IWM_RATE_MCS_ANT_NUM; i++) {
ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM;
if (iwm_mvm_get_valid_tx_ant(sc) & (1 << ind)) {
sc->sc_scan_last_antenna = ind;
break;
}
}
tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS;
if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck)
return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK |
tx_ant);
else
return htole32(IWM_RATE_6M_PLCP | tx_ant);
}
static inline boolean_t
iwm_mvm_rrm_scan_needed(struct iwm_softc *sc)
{
/* require rrm scan whenever the fw supports it */
return fw_has_capa(&sc->sc_fw.ucode_capa,
IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
}
#ifdef IWM_DEBUG
static const char *
iwm_mvm_ebs_status_str(enum iwm_scan_ebs_status status)
{
switch (status) {
case IWM_SCAN_EBS_SUCCESS:
return "successful";
case IWM_SCAN_EBS_INACTIVE:
return "inactive";
case IWM_SCAN_EBS_FAILED:
case IWM_SCAN_EBS_CHAN_NOT_FOUND:
default:
return "failed";
}
}
static const char *
iwm_mvm_offload_status_str(enum iwm_scan_offload_complete_status status)
{
return (status == IWM_SCAN_OFFLOAD_ABORTED) ? "aborted" : "completed";
}
#endif
void
iwm_mvm_rx_lmac_scan_complete_notif(struct iwm_softc *sc,
struct iwm_rx_packet *pkt)
{
struct iwm_periodic_scan_complete *scan_notif = (void *)pkt->data;
/* If this happens, the firmware has mistakenly sent an LMAC
* notification during UMAC scans -- warn and ignore it.
*/
if (fw_has_capa(&sc->sc_fw.ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) {
device_printf(sc->sc_dev,
"%s: Mistakenly got LMAC notification during UMAC scan\n",
__func__);
return;
}
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Regular scan %s, EBS status %s (FW)\n",
iwm_mvm_offload_status_str(scan_notif->status),
iwm_mvm_ebs_status_str(scan_notif->ebs_status));
sc->last_ebs_successful =
scan_notif->ebs_status == IWM_SCAN_EBS_SUCCESS ||
scan_notif->ebs_status == IWM_SCAN_EBS_INACTIVE;
}
void
iwm_mvm_rx_umac_scan_complete_notif(struct iwm_softc *sc,
struct iwm_rx_packet *pkt)
{
struct iwm_umac_scan_complete *notif = (void *)pkt->data;
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"Scan completed, uid %u, status %s, EBS status %s\n",
le32toh(notif->uid),
iwm_mvm_offload_status_str(notif->status),
iwm_mvm_ebs_status_str(notif->ebs_status));
if (notif->ebs_status != IWM_SCAN_EBS_SUCCESS &&
notif->ebs_status != IWM_SCAN_EBS_INACTIVE)
sc->last_ebs_successful = FALSE;
}
static int
iwm_mvm_scan_skip_channel(struct ieee80211_channel *c)
{
if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c))
return 0;
else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c))
return 0;
else
return 1;
}
static uint8_t
iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc,
struct iwm_scan_channel_cfg_lmac *chan, int n_ssids)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
struct ieee80211_channel *c;
uint8_t nchan;
int j;
for (nchan = j = 0;
j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels;
j++) {
c = ss->ss_chans[j];
/*
* Catch other channels, in case we have 900MHz channels or
* something in the chanlist.
*/
if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) {
IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
"%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
__func__, c->ic_freq, c->ic_ieee, c->ic_flags);
continue;
}
IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
"Adding channel %d (%d Mhz) to the list\n",
nchan, c->ic_freq);
chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0));
chan->iter_count = htole16(1);
chan->iter_interval = htole32(0);
chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL);
chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids));
/* XXX IEEE80211_SCAN_NOBCAST flag is never set. */
if (!IEEE80211_IS_CHAN_PASSIVE(c) &&
(!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0))
chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE);
chan++;
nchan++;
}
return nchan;
}
static uint8_t
iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc,
struct iwm_scan_channel_cfg_umac *chan, int n_ssids)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211_scan_state *ss = ic->ic_scan;
struct ieee80211_channel *c;
uint8_t nchan;
int j;
for (nchan = j = 0;
j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels;
j++) {
c = ss->ss_chans[j];
/*
* Catch other channels, in case we have 900MHz channels or
* something in the chanlist.
*/
if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) {
IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
"%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
__func__, c->ic_freq, c->ic_ieee, c->ic_flags);
continue;
}
IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
"Adding channel %d (%d Mhz) to the list\n",
nchan, c->ic_freq);
chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0);
chan->iter_count = 1;
chan->iter_interval = htole16(0);
chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids));
chan++;
nchan++;
}
return nchan;
}
static int
iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf;
struct ieee80211_rateset *rs;
size_t remain = sizeof(preq->buf);
uint8_t *frm, *pos;
memset(preq, 0, sizeof(*preq));
/* Ensure enough space for header and SSID IE. */
if (remain < sizeof(*wh) + 2)
return ENOBUFS;
/*
* Build a probe request frame. Most of the following code is a
* copy & paste of what is done in net80211.
*/
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
IEEE80211_FC0_SUBTYPE_PROBE_REQ;
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr);
IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr);
*(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */
*(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */
frm = (uint8_t *)(wh + 1);
frm = ieee80211_add_ssid(frm, NULL, 0);
/* Tell the firmware where the MAC header is. */
preq->mac_header.offset = 0;
preq->mac_header.len = htole16(frm - (uint8_t *)wh);
remain -= frm - (uint8_t *)wh;
/* Fill in 2GHz IEs and tell firmware where they are. */
rs = &ic->ic_sup_rates[IEEE80211_MODE_11G];
if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
if (remain < 4 + rs->rs_nrates)
return ENOBUFS;
} else if (remain < 2 + rs->rs_nrates) {
return ENOBUFS;
}
preq->band_data[0].offset = htole16(frm - (uint8_t *)wh);
pos = frm;
frm = ieee80211_add_rates(frm, rs);
if (rs->rs_nrates > IEEE80211_RATE_SIZE)
frm = ieee80211_add_xrates(frm, rs);
preq->band_data[0].len = htole16(frm - pos);
remain -= frm - pos;
if (iwm_mvm_rrm_scan_needed(sc)) {
if (remain < 3)
return ENOBUFS;
*frm++ = IEEE80211_ELEMID_DSPARMS;
*frm++ = 1;
*frm++ = 0;
remain -= 3;
}
if (sc->nvm_data->sku_cap_band_52GHz_enable) {
/* Fill in 5GHz IEs. */
rs = &ic->ic_sup_rates[IEEE80211_MODE_11A];
if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
if (remain < 4 + rs->rs_nrates)
return ENOBUFS;
} else if (remain < 2 + rs->rs_nrates) {
return ENOBUFS;
}
preq->band_data[1].offset = htole16(frm - (uint8_t *)wh);
pos = frm;
frm = ieee80211_add_rates(frm, rs);
if (rs->rs_nrates > IEEE80211_RATE_SIZE)
frm = ieee80211_add_xrates(frm, rs);
preq->band_data[1].len = htole16(frm - pos);
remain -= frm - pos;
}
/* Send 11n IEs on both 2GHz and 5GHz bands. */
preq->common_data.offset = htole16(frm - (uint8_t *)wh);
pos = frm;
#if 0
if (ic->ic_flags & IEEE80211_F_HTON) {
if (remain < 28)
return ENOBUFS;
frm = ieee80211_add_htcaps(frm, ic);
/* XXX add WME info? */
}
#endif
preq->common_data.len = htole16(frm - pos);
return 0;
}
int
iwm_mvm_config_umac_scan(struct iwm_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
struct iwm_scan_config *scan_config;
int ret, j, nchan;
size_t cmd_size;
struct ieee80211_channel *c;
struct iwm_host_cmd hcmd = {
.id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0),
.flags = IWM_CMD_SYNC,
};
static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M |
IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M |
IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M |
IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M |
IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M |
IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M |
IWM_SCAN_CONFIG_RATE_54M);
cmd_size = sizeof(*scan_config) + sc->sc_fw.ucode_capa.n_scan_channels;
scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO);
if (scan_config == NULL)
return ENOMEM;
scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc));
scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc));
scan_config->legacy_rates = htole32(rates |
IWM_SCAN_CONFIG_SUPPORTED_RATE(rates));
/* These timings correspond to iwlwifi's UNASSOC scan. */
scan_config->dwell_active = 10;
scan_config->dwell_passive = 110;
scan_config->dwell_fragmented = 44;
scan_config->dwell_extended = 90;
scan_config->out_of_channel_time = htole32(0);
scan_config->suspend_time = htole32(0);
IEEE80211_ADDR_COPY(scan_config->mac_addr,
vap ? vap->iv_myaddr : ic->ic_macaddr);
scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id;
scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS |
IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD |
IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
for (nchan = j = 0;
j < ic->ic_nchans && nchan < sc->sc_fw.ucode_capa.n_scan_channels;
j++) {
c = &ic->ic_channels[j];
/* For 2GHz, only populate 11b channels */
/* For 5GHz, only populate 11a channels */
/*
* Catch other channels, in case we have 900MHz channels or
* something in the chanlist.
*/
if (iwm_mvm_scan_skip_channel(c))
continue;
scan_config->channel_array[nchan++] =
ieee80211_mhz2ieee(c->ic_freq, 0);
}
scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE |
IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS |
IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS |
IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES |
IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR |
IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
IWM_SCAN_CONFIG_N_CHANNELS(nchan) |
IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
hcmd.data[0] = scan_config;
hcmd.len[0] = cmd_size;
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n");
ret = iwm_send_cmd(sc, &hcmd);
if (!ret)
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"UMAC scan config was sent successfully\n");
free(scan_config, M_DEVBUF);
return ret;
}
static boolean_t
iwm_mvm_scan_use_ebs(struct iwm_softc *sc)
{
const struct iwm_ucode_capabilities *capa = &sc->sc_fw.ucode_capa;
/* We can only use EBS if:
* 1. the feature is supported;
* 2. the last EBS was successful;
* 3. if only single scan, the single scan EBS API is supported;
* 4. it's not a p2p find operation.
*/
return ((capa->flags & IWM_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
sc->last_ebs_successful);
}
int
iwm_mvm_umac_scan(struct iwm_softc *sc)
{
struct iwm_host_cmd hcmd = {
.id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0),
.len = { 0, },
.data = { NULL, },
.flags = IWM_CMD_SYNC,
};
struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
struct iwm_scan_req_umac *req;
struct iwm_scan_req_umac_tail *tail;
size_t req_len;
uint8_t i, nssid;
int ret;
req_len = sizeof(struct iwm_scan_req_umac) +
(sizeof(struct iwm_scan_channel_cfg_umac) *
sc->sc_fw.ucode_capa.n_scan_channels) +
sizeof(struct iwm_scan_req_umac_tail);
if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
return ENOMEM;
req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
if (req == NULL)
return ENOMEM;
hcmd.len[0] = (uint16_t)req_len;
hcmd.data[0] = (void *)req;
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n");
/* These timings correspond to iwlwifi's UNASSOC scan. */
req->active_dwell = 10;
req->passive_dwell = 110;
req->fragmented_dwell = 44;
req->extended_dwell = 90;
req->max_out_time = 0;
req->suspend_time = 0;
req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
req->n_channels = iwm_mvm_umac_scan_fill_channels(sc,
(struct iwm_scan_channel_cfg_umac *)req->data, nssid);
req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL |
IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE |
IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL);
tail = (void *)((char *)&req->data +
sizeof(struct iwm_scan_channel_cfg_umac) *
sc->sc_fw.ucode_capa.n_scan_channels);
/* Check if we're doing an active directed scan. */
for (i = 0; i < nssid; i++) {
tail->direct_scan[i].id = IEEE80211_ELEMID_SSID;
tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
IEEE80211_NWID_LEN);
memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
tail->direct_scan[i].len);
/* XXX debug */
}
if (nssid != 0) {
req->general_flags |=
htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT);
} else
req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE);
if (iwm_mvm_scan_use_ebs(sc))
req->channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS |
IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWM_SCAN_CHANNEL_FLAG_CACHE_ADD;
if (iwm_mvm_rrm_scan_needed(sc))
req->general_flags |=
htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED);
ret = iwm_mvm_fill_probe_req(sc, &tail->preq);
if (ret) {
free(req, M_DEVBUF);
return ret;
}
/* Specify the scan plan: We'll do one iteration. */
tail->schedule[0].interval = 0;
tail->schedule[0].iter_count = 1;
ret = iwm_send_cmd(sc, &hcmd);
if (!ret)
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"Scan request was sent successfully\n");
free(req, M_DEVBUF);
return ret;
}
int
iwm_mvm_lmac_scan(struct iwm_softc *sc)
{
struct iwm_host_cmd hcmd = {
.id = IWM_SCAN_OFFLOAD_REQUEST_CMD,
.len = { 0, },
.data = { NULL, },
.flags = IWM_CMD_SYNC,
};
struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
struct iwm_scan_req_lmac *req;
size_t req_len;
uint8_t i, nssid;
int ret;
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"Handling ieee80211 scan request\n");
req_len = sizeof(struct iwm_scan_req_lmac) +
(sizeof(struct iwm_scan_channel_cfg_lmac) *
sc->sc_fw.ucode_capa.n_scan_channels) + sizeof(struct iwm_scan_probe_req);
if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
return ENOMEM;
req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
if (req == NULL)
return ENOMEM;
hcmd.len[0] = (uint16_t)req_len;
hcmd.data[0] = (void *)req;
/* These timings correspond to iwlwifi's UNASSOC scan. */
req->active_dwell = 10;
req->passive_dwell = 110;
req->fragmented_dwell = 44;
req->extended_dwell = 90;
req->max_out_time = 0;
req->suspend_time = 0;
req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH);
req->rx_chain_select = iwm_mvm_scan_rx_chain(sc);
req->iter_num = htole32(1);
req->delay = 0;
req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL |
IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE |
IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL);
if (iwm_mvm_rrm_scan_needed(sc))
req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
req->flags = iwm_mvm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]);
req->filter_flags =
htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON);
/* Tx flags 2 GHz. */
req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
IWM_TX_CMD_FLG_BT_DIS);
req->tx_cmd[0].rate_n_flags =
iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/);
req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id;
/* Tx flags 5 GHz. */
req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
IWM_TX_CMD_FLG_BT_DIS);
req->tx_cmd[1].rate_n_flags =
iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/);
req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id;
/* Check if we're doing an active directed scan. */
nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
for (i = 0; i < nssid; i++) {
req->direct_scan[i].id = IEEE80211_ELEMID_SSID;
req->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
IEEE80211_NWID_LEN);
memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
req->direct_scan[i].len);
/* XXX debug */
}
if (nssid != 0) {
req->scan_flags |=
htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION);
} else
req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE);
req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc,
(struct iwm_scan_channel_cfg_lmac *)req->data, nssid);
ret = iwm_mvm_fill_probe_req(sc,
(struct iwm_scan_probe_req *)(req->data +
(sizeof(struct iwm_scan_channel_cfg_lmac) *
sc->sc_fw.ucode_capa.n_scan_channels)));
if (ret) {
free(req, M_DEVBUF);
return ret;
}
/* Specify the scan plan: We'll do one iteration. */
req->schedule[0].iterations = 1;
req->schedule[0].full_scan_mul = 1;
if (iwm_mvm_scan_use_ebs(sc)) {
req->channel_opt[0].flags =
htole16(IWM_SCAN_CHANNEL_FLAG_EBS |
IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWM_SCAN_CHANNEL_FLAG_CACHE_ADD);
req->channel_opt[0].non_ebs_ratio =
htole16(IWM_DENSE_EBS_SCAN_RATIO);
req->channel_opt[1].flags =
htole16(IWM_SCAN_CHANNEL_FLAG_EBS |
IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWM_SCAN_CHANNEL_FLAG_CACHE_ADD);
req->channel_opt[1].non_ebs_ratio =
htole16(IWM_SPARSE_EBS_SCAN_RATIO);
}
ret = iwm_send_cmd(sc, &hcmd);
if (!ret) {
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"Scan request was sent successfully\n");
}
free(req, M_DEVBUF);
return ret;
}
static int
iwm_mvm_lmac_scan_abort(struct iwm_softc *sc)
{
int ret;
struct iwm_host_cmd hcmd = {
.id = IWM_SCAN_OFFLOAD_ABORT_CMD,
.len = { 0, },
.data = { NULL, },
.flags = IWM_CMD_SYNC,
};
uint32_t status;
ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status);
if (ret)
return ret;
if (status != IWM_CAN_ABORT_STATUS) {
/*
* The scan abort will return 1 for success or
* 2 for "failure". A failure condition can be
* due to simply not being in an active scan which
* can occur if we send the scan abort before the
* microcode has notified us that a scan is completed.
*/
IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
"SCAN OFFLOAD ABORT ret %d.\n", status);
ret = ENOENT;
}
return ret;
}
static int
iwm_mvm_umac_scan_abort(struct iwm_softc *sc)
{
struct iwm_umac_scan_abort cmd = {};
int uid, ret;
uid = 0;
cmd.uid = htole32(uid);
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid);
ret = iwm_mvm_send_cmd_pdu(sc,
iwm_cmd_id(IWM_SCAN_ABORT_UMAC,
IWM_ALWAYS_LONG_GROUP, 0),
0, sizeof(cmd), &cmd);
return ret;
}
int
iwm_mvm_scan_stop_wait(struct iwm_softc *sc)
{
struct iwm_notification_wait wait_scan_done;
static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC,
IWM_SCAN_OFFLOAD_COMPLETE, };
int ret;
iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done,
scan_done_notif, nitems(scan_done_notif),
NULL, NULL);
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n");
if (fw_has_capa(&sc->sc_fw.ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN))
ret = iwm_mvm_umac_scan_abort(sc);
else
ret = iwm_mvm_lmac_scan_abort(sc);
if (ret) {
IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n");
iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done);
return ret;
}
IWM_UNLOCK(sc);
ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz);
IWM_LOCK(sc);
return ret;
}
↑ V547 Expression 'remain < sizeof (* wh) + 2' is always false.