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dhd_pno.c
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dhd_pno.c
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/*
* Broadcom Dongle Host Driver (DHD)
* Prefered Network Offload and Wi-Fi Location Service(WLS) code.
*
* Copyright (C) 2022, Broadcom.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
*
* <<Broadcom-WL-IPTag/Dual:>>
*/
#if defined(GSCAN_SUPPORT) && !defined(PNO_SUPPORT)
#error "GSCAN needs PNO to be enabled!"
#endif
#ifdef PNO_SUPPORT
#include <typedefs.h>
#include <osl.h>
#include <epivers.h>
#include <bcmutils.h>
#include <bcmendian.h>
#include <linuxver.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sort.h>
#include <dngl_stats.h>
#include <wlioctl.h>
#include <bcmevent.h>
#include <dhd.h>
#include <dhd_pno.h>
#include <dhd_dbg.h>
#ifdef GSCAN_SUPPORT
#include <linux/gcd.h>
#endif /* GSCAN_SUPPORT */
#ifdef WL_CFG80211
#include <wl_cfg80211.h>
#endif /* WL_CFG80211 */
#ifdef __BIG_ENDIAN
#include <bcmendian.h>
#define htod32(i) (bcmswap32(i))
#define htod16(i) (bcmswap16(i))
#define dtoh32(i) (bcmswap32(i))
#define dtoh16(i) (bcmswap16(i))
#define htodchanspec(i) htod16(i)
#define dtohchanspec(i) dtoh16(i)
#else
#define htod32(i) (i)
#define htod16(i) (i)
#define dtoh32(i) (i)
#define dtoh16(i) (i)
#define htodchanspec(i) (i)
#define dtohchanspec(i) (i)
#endif /* IL_BIGENDINA */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0))
#define COMPLETION_WAIT_QUEUE_ACTIVE(wait_queue) swait_active(wait_queue)
#else
#define COMPLETION_WAIT_QUEUE_ACTIVE(wait_queue) waitqueue_active(wait_queue)
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0) */
#ifdef CUSTOM_PREFIX
#define PNO_PRINT_PREFIX "[%s]"CUSTOM_PREFIX, OSL_GET_RTCTIME()
#define PNO_PRINT_SYSTEM_TIME pr_cont(PNO_PRINT_PREFIX)
#define PNO_CONS_ONLY(args) \
do { \
PNO_PRINT_SYSTEM_TIME; \
pr_cont args; \
} while (0)
#else
#define PNO_PRINT_SYSTEM_TIME
#define PNO_CONS_ONLY(args) do { printf args;} while (0)
#endif /* CUSTOM_PREFIX */
#define NULL_CHECK(p, s, err) \
do { \
if (!(p)) { \
PNO_CONS_ONLY(("NULL POINTER (%s) : %s\n", __FUNCTION__, (s))); \
err = BCME_ERROR; \
return err; \
} \
} while (0)
#define PNO_GET_PNOSTATE(dhd) ((dhd_pno_status_info_t *)dhd->pno_state)
#define PNO_BESTNET_LEN WLC_IOCTL_MEDLEN
#define PNO_ON 1
#define PNO_OFF 0
#define CHANNEL_2G_MIN 1
#define CHANNEL_2G_MAX 14
#define CHANNEL_5G_MIN 34
#define CHANNEL_5G_MAX 165
#define IS_2G_CHANNEL(ch) ((ch >= CHANNEL_2G_MIN) && \
(ch <= CHANNEL_2G_MAX))
#define IS_5G_CHANNEL(ch) ((ch >= CHANNEL_5G_MIN) && \
(ch <= CHANNEL_5G_MAX))
#define MAX_NODE_CNT 5
#define WLS_SUPPORTED(pno_state) (pno_state->wls_supported == TRUE)
#define TIME_DIFF(timestamp1, timestamp2) (abs((uint32)(timestamp1/1000) \
- (uint32)(timestamp2/1000)))
#define TIME_DIFF_MS(timestamp1, timestamp2) (abs((uint32)(timestamp1) \
- (uint32)(timestamp2)))
#define TIMESPEC64_TO_US(ts) (((ts).tv_sec * USEC_PER_SEC) + \
(ts).tv_nsec / NSEC_PER_USEC)
#define ENTRY_OVERHEAD strlen("bssid=\nssid=\nfreq=\nlevel=\nage=\ndist=\ndistSd=\n====")
#define TIME_MIN_DIFF 5
#define EVENT_DATABUF_MAXLEN (512 - sizeof(bcm_event_t))
#define EVENT_MAX_NETCNT_V1 \
((EVENT_DATABUF_MAXLEN - sizeof(wl_pfn_scanresults_v1_t)) \
/ sizeof(wl_pfn_net_info_v1_t) + 1)
#define EVENT_MAX_NETCNT_V2 \
((EVENT_DATABUF_MAXLEN - sizeof(wl_pfn_scanresults_v2_t)) \
/ sizeof(wl_pfn_net_info_v2_t) + 1)
#define EVENT_MAX_NETCNT_V3 \
((EVENT_DATABUF_MAXLEN - sizeof(wl_pfn_scanresults_v3_t)) \
/ sizeof(wl_pfn_net_info_v3_t) + 1)
#ifdef GSCAN_SUPPORT
static int _dhd_pno_flush_ssid(dhd_pub_t *dhd);
static wl_pfn_gscan_ch_bucket_cfg_t *
dhd_pno_gscan_create_channel_list(dhd_pub_t *dhd, dhd_pno_status_info_t *pno_state,
uint16 *chan_list, uint32 *num_buckets, uint32 *num_buckets_to_fw);
#endif /* GSCAN_SUPPORT */
static int dhd_pno_set_legacy_pno(dhd_pub_t *dhd, uint16 scan_fr, int pno_repeat,
int pno_freq_expo_max, uint16 *channel_list, int nchan);
static inline bool
is_dfs(dhd_pub_t *dhd, uint16 channel)
{
u32 ch;
s32 err;
u8 buf[32];
ch = wl_ch_host_to_driver(channel);
err = dhd_iovar(dhd, 0, "per_chan_info", (char *)&ch,
sizeof(u32), buf, sizeof(buf), FALSE);
if (unlikely(err)) {
DHD_ERROR(("get per chan info failed:%d\n", err));
return FALSE;
}
/* Check the channel flags returned by fw */
if (*((u32 *)buf) & WL_CHAN_PASSIVE) {
return TRUE;
}
return FALSE;
}
int
dhd_pno_clean(dhd_pub_t *dhd)
{
int pfn = 0;
int err;
dhd_pno_status_info_t *_pno_state;
NULL_CHECK(dhd, "dhd is NULL", err);
NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
_pno_state = PNO_GET_PNOSTATE(dhd);
DHD_PNO(("%s enter\n", __FUNCTION__));
/* Disable PNO */
err = dhd_iovar(dhd, 0, "pfn", (char *)&pfn, sizeof(pfn), NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfn(error : %d)\n",
__FUNCTION__, err));
goto exit;
}
_pno_state->pno_status = DHD_PNO_DISABLED;
err = dhd_iovar(dhd, 0, "pfnclear", NULL, 0, NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfnclear(error : %d)\n",
__FUNCTION__, err));
}
exit:
return err;
}
bool
dhd_is_pno_supported(dhd_pub_t *dhd)
{
dhd_pno_status_info_t *_pno_state;
if (!dhd || !dhd->pno_state) {
DHD_ERROR(("NULL POINTER : %s\n",
__FUNCTION__));
return FALSE;
}
_pno_state = PNO_GET_PNOSTATE(dhd);
return WLS_SUPPORTED(_pno_state);
}
bool
dhd_is_legacy_pno_enabled(dhd_pub_t *dhd)
{
dhd_pno_status_info_t *_pno_state;
if (!dhd || !dhd->pno_state) {
DHD_ERROR(("NULL POINTER : %s\n",
__FUNCTION__));
return FALSE;
}
_pno_state = PNO_GET_PNOSTATE(dhd);
return ((_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) != 0);
}
#ifdef GSCAN_SUPPORT
static uint64
convert_fw_rel_time_to_systime(struct timespec64 *ts, uint32 fw_ts_ms)
{
return ((uint64)(TIMESPEC64_TO_US(*ts)) - (uint64)(fw_ts_ms * USEC_PER_MSEC));
}
static void
dhd_pno_idx_to_ssid(struct dhd_pno_gscan_params *gscan_params,
dhd_epno_results_t *res, uint32 idx)
{
dhd_pno_ssid_t *iter, *next;
int i;
/* If idx doesn't make sense */
if (idx >= gscan_params->epno_cfg.num_epno_ssid) {
DHD_ERROR(("No match, idx %d num_ssid %d\n", idx,
gscan_params->epno_cfg.num_epno_ssid));
goto exit;
}
if (gscan_params->epno_cfg.num_epno_ssid > 0) {
i = 0;
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
list_for_each_entry_safe(iter, next,
&gscan_params->epno_cfg.epno_ssid_list, list) {
GCC_DIAGNOSTIC_POP();
if (i++ == idx) {
memcpy(res->ssid, iter->SSID, iter->SSID_len);
res->ssid_len = iter->SSID_len;
return;
}
}
}
exit:
/* If we are here then there was no match */
res->ssid[0] = '\0';
res->ssid_len = 0;
return;
}
/* Translate HAL flag bitmask to BRCM FW flag bitmask */
void
dhd_pno_translate_epno_fw_flags(uint32 *flags)
{
uint32 in_flags, fw_flags = 0;
in_flags = *flags;
if (in_flags & DHD_EPNO_A_BAND_TRIG) {
fw_flags |= WL_PFN_SSID_A_BAND_TRIG;
}
if (in_flags & DHD_EPNO_BG_BAND_TRIG) {
fw_flags |= WL_PFN_SSID_BG_BAND_TRIG;
}
if (!(in_flags & DHD_EPNO_STRICT_MATCH) &&
!(in_flags & DHD_EPNO_HIDDEN_SSID)) {
fw_flags |= WL_PFN_SSID_IMPRECISE_MATCH;
}
if (in_flags & DHD_EPNO_SAME_NETWORK) {
fw_flags |= WL_PFN_SSID_SAME_NETWORK;
}
/* Add any hard coded flags needed */
fw_flags |= WL_PFN_SUPPRESS_AGING_MASK;
*flags = fw_flags;
return;
}
/* Translate HAL auth bitmask to BRCM FW bitmask */
void
dhd_pno_set_epno_auth_flag(uint32 *wpa_auth)
{
switch (*wpa_auth) {
case DHD_PNO_AUTH_CODE_OPEN:
*wpa_auth = WPA_AUTH_DISABLED;
break;
case DHD_PNO_AUTH_CODE_PSK:
*wpa_auth = (WPA_AUTH_PSK | WPA2_AUTH_PSK);
break;
case DHD_PNO_AUTH_CODE_EAPOL:
*wpa_auth = ~WPA_AUTH_NONE;
break;
default:
DHD_ERROR(("%s: Unknown auth %d", __FUNCTION__, *wpa_auth));
*wpa_auth = WPA_AUTH_PFN_ANY;
break;
}
return;
}
/* Cleanup all results */
static void
dhd_gscan_clear_all_batch_results(dhd_pub_t *dhd)
{
struct dhd_pno_gscan_params *gscan_params;
dhd_pno_status_info_t *_pno_state;
gscan_results_cache_t *iter;
_pno_state = PNO_GET_PNOSTATE(dhd);
gscan_params = &_pno_state->pno_params_arr[INDEX_OF_GSCAN_PARAMS].params_gscan;
iter = gscan_params->gscan_batch_cache;
/* Mark everything as consumed */
while (iter) {
iter->tot_consumed = iter->tot_count;
iter = iter->next;
}
dhd_gscan_batch_cache_cleanup(dhd);
return;
}
static int
_dhd_pno_gscan_cfg(dhd_pub_t *dhd, wl_pfn_gscan_cfg_t *pfncfg_gscan_param, int size)
{
int err = BCME_OK;
NULL_CHECK(dhd, "dhd is NULL", err);
DHD_PNO(("%s enter\n", __FUNCTION__));
err = dhd_iovar(dhd, 0, "pfn_gscan_cfg", (char *)pfncfg_gscan_param, size, NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfncfg_gscan_param\n", __FUNCTION__));
goto exit;
}
exit:
return err;
}
static int
_dhd_pno_flush_ssid(dhd_pub_t *dhd)
{
int err;
wl_pfn_t pfn_elem;
memset(&pfn_elem, 0, sizeof(wl_pfn_t));
pfn_elem.flags = htod32(WL_PFN_FLUSH_ALL_SSIDS);
err = dhd_iovar(dhd, 0, "pfn_add", (char *)&pfn_elem, sizeof(wl_pfn_t), NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfn_add\n", __FUNCTION__));
}
return err;
}
static bool
is_batch_retrieval_complete(struct dhd_pno_gscan_params *gscan_params)
{
smp_rmb();
return (gscan_params->get_batch_flag == GSCAN_BATCH_RETRIEVAL_COMPLETE);
}
#endif /* GSCAN_SUPPORT */
static int
_dhd_pno_suspend(dhd_pub_t *dhd)
{
int err;
int suspend = 1;
dhd_pno_status_info_t *_pno_state;
NULL_CHECK(dhd, "dhd is NULL", err);
NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
DHD_PNO(("%s enter\n", __FUNCTION__));
_pno_state = PNO_GET_PNOSTATE(dhd);
err = dhd_iovar(dhd, 0, "pfn_suspend", (char *)&suspend, sizeof(suspend), NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to suspend pfn(error :%d)\n", __FUNCTION__, err));
goto exit;
}
_pno_state->pno_status = DHD_PNO_SUSPEND;
exit:
return err;
}
static int
_dhd_pno_enable(dhd_pub_t *dhd, int enable)
{
int err = BCME_OK;
dhd_pno_status_info_t *_pno_state;
NULL_CHECK(dhd, "dhd is NULL", err);
NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
_pno_state = PNO_GET_PNOSTATE(dhd);
DHD_PNO(("%s enter\n", __FUNCTION__));
if (enable & 0xfffe) {
DHD_ERROR(("%s invalid value\n", __FUNCTION__));
err = BCME_BADARG;
goto exit;
}
if (!dhd_support_sta_mode(dhd)) {
DHD_ERROR(("PNO is not allowed for non-STA mode"));
err = BCME_BADOPTION;
goto exit;
}
/* Enable/Disable PNO */
err = dhd_iovar(dhd, 0, "pfn", (char *)&enable, sizeof(enable), NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfn_set - %d\n", __FUNCTION__, err));
goto exit;
}
_pno_state->pno_status = (enable)?
DHD_PNO_ENABLED : DHD_PNO_DISABLED;
if (!enable)
_pno_state->pno_mode = DHD_PNO_NONE_MODE;
DHD_PNO(("%s set pno as %s\n",
__FUNCTION__, enable ? "Enable" : "Disable"));
exit:
return err;
}
static int
_dhd_pno_set(dhd_pub_t *dhd, const dhd_pno_params_t *pno_params, dhd_pno_mode_t mode)
{
int err = BCME_OK;
wl_pfn_param_v3_t pfn_param;
dhd_pno_params_t *_params;
dhd_pno_status_info_t *_pno_state;
bool combined_scan = FALSE;
uint16 size;
bool use_v3 = FALSE;
DHD_PNO(("%s enter\n", __FUNCTION__));
NULL_CHECK(dhd, "dhd is NULL", err);
NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
_pno_state = PNO_GET_PNOSTATE(dhd);
/* Query pfn version */
bzero(&pfn_param, sizeof(pfn_param));
err = dhd_iovar(dhd, 0, "pfn_set", (char *)&pfn_param, sizeof(pfn_param),
(char *)&pfn_param, sizeof(pfn_param), FALSE);
if (err < 0) {
if (err == BCME_UNSUPPORTED) {
DHD_PNO(("%s : PFN versioning not supported. Use v2\n",
__FUNCTION__));
use_v3 = FALSE;
} else {
DHD_ERROR(("%s : failed to query pfn_set %d\n", __FUNCTION__, err));
goto exit;
}
} else {
if (pfn_param.version == PFN_VERSION_V3) {
DHD_ERROR(("%s : using pfn_param v3\n", __FUNCTION__));
use_v3 = TRUE;
} else if (pfn_param.version == PFN_VERSION_V2) {
DHD_ERROR(("%s : using pfn_param v2\n", __FUNCTION__));
use_v3 = FALSE;
} else {
DHD_ERROR(("unsupported pfn ver:%d\n", pfn_param.version));
err = BCME_UNSUPPORTED;
goto exit;
}
}
/* set pfn parameters */
bzero(&pfn_param, sizeof(pfn_param));
if (use_v3) {
pfn_param.version = PFN_VERSION_V3;
pfn_param.version = htod32(pfn_param.version);
size = sizeof(wl_pfn_param_v3_t);
pfn_param.length = htod32(size);
} else {
wl_pfn_param_v2_t *pfn_param_v2 = (wl_pfn_param_v2_t *)&pfn_param;
pfn_param_v2->version = PFN_VERSION_V2;
pfn_param_v2->version = htod32(pfn_param_v2->version);
size = sizeof(wl_pfn_param_v2_t);
}
pfn_param.flags = ((PFN_LIST_ORDER << SORT_CRITERIA_BIT) |
(ENABLE << IMMEDIATE_SCAN_BIT) | (ENABLE << REPORT_SEPERATELY_BIT));
#ifdef WL_SCHED_SCAN
/* bit to select the pfn partial scan result event logic */
pfn_param.flags |= htod16(ENABLE << PFN_FULL_SCAN_RESULT_BIT);
#endif /* WL_SCHED_SCAN */
if (mode == DHD_PNO_LEGACY_MODE) {
pfn_param.repeat = (uchar) (pno_params->params_legacy.pno_repeat);
/* check and set extra pno params */
if ((pno_params->params_legacy.pno_repeat != 0) &&
(pno_params->params_legacy.pno_freq_expo_max != 0)) {
pfn_param.flags |= htod16(ENABLE << ENABLE_ADAPTSCAN_BIT);
pfn_param.exp = (uchar) (pno_params->params_legacy.pno_freq_expo_max);
}
/* set up pno scan fr */
if (pno_params->params_legacy.scan_fr != 0)
pfn_param.scan_freq = htod32(pno_params->params_legacy.scan_fr);
if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
DHD_PNO(("will enable combined scan with BATCHIG SCAN MODE\n"));
mode |= DHD_PNO_BATCH_MODE;
combined_scan = TRUE;
} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
DHD_PNO(("will enable combined scan with HOTLIST SCAN MODE\n"));
mode |= DHD_PNO_HOTLIST_MODE;
combined_scan = TRUE;
}
#ifdef GSCAN_SUPPORT
else if (_pno_state->pno_mode & DHD_PNO_GSCAN_MODE) {
DHD_PNO(("will enable combined scan with GSCAN SCAN MODE\n"));
mode |= DHD_PNO_GSCAN_MODE;
}
#endif /* GSCAN_SUPPORT */
}
if (mode & (DHD_PNO_BATCH_MODE | DHD_PNO_HOTLIST_MODE)) {
/* Scan frequency of 30 sec */
pfn_param.scan_freq = htod32(30);
/* slow adapt scan is off by default */
pfn_param.slow_freq = htod32(0);
/* RSSI margin of 30 dBm */
pfn_param.rssi_margin = htod16(PNO_RSSI_MARGIN_DBM);
/* Network timeout 60 sec */
pfn_param.lost_network_timeout = htod32(60);
/* best n = 2 by default */
pfn_param.bestn = DEFAULT_BESTN;
/* mscan m=0 by default, so not record best networks by default */
pfn_param.mscan = DEFAULT_MSCAN;
/* default repeat = 10 */
pfn_param.repeat = DEFAULT_REPEAT;
/* by default, maximum scan interval = 2^2
* scan_freq when adaptive scan is turned on
*/
pfn_param.exp = DEFAULT_EXP;
if (mode == DHD_PNO_BATCH_MODE) {
/* In case of BATCH SCAN */
if (pno_params->params_batch.bestn)
pfn_param.bestn = pno_params->params_batch.bestn;
if (pno_params->params_batch.scan_fr)
pfn_param.scan_freq = htod32(pno_params->params_batch.scan_fr);
if (pno_params->params_batch.mscan)
pfn_param.mscan = pno_params->params_batch.mscan;
/* enable broadcast scan */
pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
} else if (mode == DHD_PNO_HOTLIST_MODE) {
/* In case of HOTLIST SCAN */
if (pno_params->params_hotlist.scan_fr)
pfn_param.scan_freq = htod32(pno_params->params_hotlist.scan_fr);
pfn_param.bestn = 0;
pfn_param.repeat = 0;
/* enable broadcast scan */
pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
}
if (combined_scan) {
/* Disable Adaptive Scan */
pfn_param.flags &= ~(htod16(ENABLE << ENABLE_ADAPTSCAN_BIT));
pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
pfn_param.repeat = 0;
pfn_param.exp = 0;
if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
/* In case of Legacy PNO + BATCH SCAN */
_params = &(_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS]);
if (_params->params_batch.bestn)
pfn_param.bestn = _params->params_batch.bestn;
if (_params->params_batch.scan_fr)
pfn_param.scan_freq = htod32(_params->params_batch.scan_fr);
if (_params->params_batch.mscan)
pfn_param.mscan = _params->params_batch.mscan;
} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
/* In case of Legacy PNO + HOTLIST SCAN */
_params = &(_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS]);
if (_params->params_hotlist.scan_fr)
pfn_param.scan_freq = htod32(_params->params_hotlist.scan_fr);
pfn_param.bestn = 0;
pfn_param.repeat = 0;
}
}
}
#ifdef GSCAN_SUPPORT
if (mode & DHD_PNO_GSCAN_MODE) {
uint32 lost_network_timeout;
pfn_param.scan_freq = htod32(pno_params->params_gscan.scan_fr);
if (pno_params->params_gscan.mscan) {
pfn_param.bestn = pno_params->params_gscan.bestn;
pfn_param.mscan = pno_params->params_gscan.mscan;
pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
}
/* RSSI margin of 30 dBm */
pfn_param.rssi_margin = htod16(PNO_RSSI_MARGIN_DBM);
pfn_param.repeat = 0;
pfn_param.exp = 0;
pfn_param.slow_freq = 0;
pfn_param.flags |= htod16(ENABLE << ENABLE_ADAPTSCAN_BIT);
if (_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) {
dhd_pno_params_t *params;
params = &(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS]);
pfn_param.scan_freq = gcd(pno_params->params_gscan.scan_fr,
params->params_legacy.scan_fr);
if ((params->params_legacy.pno_repeat != 0) ||
(params->params_legacy.pno_freq_expo_max != 0)) {
pfn_param.repeat = (uchar) (params->params_legacy.pno_repeat);
pfn_param.exp = (uchar) (params->params_legacy.pno_freq_expo_max);
}
}
lost_network_timeout = (pno_params->params_gscan.max_ch_bucket_freq *
pfn_param.scan_freq *
pno_params->params_gscan.lost_ap_window);
if (lost_network_timeout) {
pfn_param.lost_network_timeout = htod32(MIN(lost_network_timeout,
GSCAN_MIN_BSSID_TIMEOUT));
} else {
pfn_param.lost_network_timeout = htod32(GSCAN_MIN_BSSID_TIMEOUT);
}
} else
#endif /* GSCAN_SUPPORT */
{
if (pfn_param.scan_freq < htod32(PNO_SCAN_MIN_FW_SEC) ||
pfn_param.scan_freq > htod32(PNO_SCAN_MAX_FW_SEC)) {
DHD_ERROR(("%s pno freq(%d sec) is not valid \n",
__FUNCTION__, PNO_SCAN_MIN_FW_SEC));
err = BCME_BADARG;
goto exit;
}
}
#if !defined(WL_USE_RANDOMIZED_SCAN)
err = dhd_set_rand_mac_oui(dhd);
/* Ignore if chip doesnt support the feature */
if (err < 0 && err != BCME_UNSUPPORTED) {
DHD_ERROR(("%s : failed to set random mac for PNO scan, %d\n", __FUNCTION__, err));
goto exit;
}
#endif /* !defined(WL_USE_RANDOMIZED_SCAN */
#ifdef GSCAN_SUPPORT
if (mode == DHD_PNO_BATCH_MODE ||
((mode & DHD_PNO_GSCAN_MODE) && pno_params->params_gscan.mscan)) {
#else
if (mode == DHD_PNO_BATCH_MODE) {
#endif /* GSCAN_SUPPORT */
int _tmp = pfn_param.bestn;
/* set bestn to calculate the max mscan which firmware supports */
err = dhd_iovar(dhd, 0, "pfnmem", (char *)&_tmp, sizeof(_tmp), NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to set pfnmem\n", __FUNCTION__));
goto exit;
}
/* get max mscan which the firmware supports */
err = dhd_iovar(dhd, 0, "pfnmem", NULL, 0, (char *)&_tmp, sizeof(_tmp), FALSE);
if (err < 0) {
DHD_ERROR(("%s : failed to get pfnmem\n", __FUNCTION__));
goto exit;
}
pfn_param.mscan = MIN(pfn_param.mscan, _tmp);
DHD_PNO((" returned mscan : %d, set bestn : %d mscan %d\n", _tmp, pfn_param.bestn,
pfn_param.mscan));
}
err = dhd_iovar(dhd, 0, "pfn_set", (char *)&pfn_param, size, NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfn_set %d\n", __FUNCTION__, err));
goto exit;
}
/* need to return mscan if this is for batch scan instead of err */
err = (mode == DHD_PNO_BATCH_MODE)? pfn_param.mscan : err;
exit:
return err;
}
static int
_dhd_pno_add_ssid(dhd_pub_t *dhd, struct list_head* ssid_list, int nssid)
{
int err = BCME_OK;
int i = 0, mem_needed;
wl_pfn_t *pfn_elem_buf;
struct dhd_pno_ssid *iter, *next;
NULL_CHECK(dhd, "dhd is NULL", err);
if (!nssid) {
NULL_CHECK(ssid_list, "ssid list is NULL", err);
return BCME_ERROR;
}
mem_needed = (sizeof(wl_pfn_t) * nssid);
pfn_elem_buf = (wl_pfn_t *) MALLOCZ(dhd->osh, mem_needed);
if (!pfn_elem_buf) {
DHD_ERROR(("%s: Can't malloc %d bytes!\n", __FUNCTION__, mem_needed));
return BCME_NOMEM;
}
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
list_for_each_entry_safe(iter, next, ssid_list, list) {
GCC_DIAGNOSTIC_POP();
pfn_elem_buf[i].infra = htod32(1);
pfn_elem_buf[i].auth = htod32(DOT11_OPEN_SYSTEM);
pfn_elem_buf[i].wpa_auth = htod32(iter->wpa_auth);
pfn_elem_buf[i].flags = htod32(iter->flags);
if (iter->hidden)
pfn_elem_buf[i].flags |= htod32(ENABLE << WL_PFN_HIDDEN_BIT);
/* If a single RSSI threshold is defined, use that */
#ifdef PNO_MIN_RSSI_TRIGGER
pfn_elem_buf[i].flags |= ((PNO_MIN_RSSI_TRIGGER & 0xFF) << WL_PFN_RSSI_SHIFT);
#else
pfn_elem_buf[i].flags |= ((iter->rssi_thresh & 0xFF) << WL_PFN_RSSI_SHIFT);
#endif /* PNO_MIN_RSSI_TRIGGER */
memcpy((char *)pfn_elem_buf[i].ssid.SSID, iter->SSID,
iter->SSID_len);
pfn_elem_buf[i].ssid.SSID_len = iter->SSID_len;
DHD_PNO(("%s size = %d hidden = %d flags = %x rssi_thresh %d\n",
iter->SSID, iter->SSID_len, iter->hidden,
iter->flags, iter->rssi_thresh));
if (++i >= nssid) {
/* shouldn't happen */
break;
}
}
err = dhd_iovar(dhd, 0, "pfn_add", (char *)pfn_elem_buf, mem_needed, NULL, 0, TRUE);
if (err < 0) {
DHD_ERROR(("%s : failed to execute pfn_add\n", __FUNCTION__));
}
MFREE(dhd->osh, pfn_elem_buf, mem_needed);
return err;
}
/* qsort compare function */
static int
_dhd_pno_cmpfunc(const void *a, const void *b)
{
return (*(const uint16*)a - *(const uint16*)b);
}
static int
_dhd_pno_chan_merge(uint16 *d_chan_list, int *nchan,
uint16 *chan_list1, int nchan1, uint16 *chan_list2, int nchan2)
{
int err = BCME_OK;
int i = 0, j = 0, k = 0;
uint16 tmp;
NULL_CHECK(d_chan_list, "d_chan_list is NULL", err);
NULL_CHECK(nchan, "nchan is NULL", err);
NULL_CHECK(chan_list1, "chan_list1 is NULL", err);
NULL_CHECK(chan_list2, "chan_list2 is NULL", err);
/* chan_list1 and chan_list2 should be sorted at first */
while (i < nchan1 && j < nchan2) {
tmp = chan_list1[i] < chan_list2[j]?
chan_list1[i++] : chan_list2[j++];
for (; i < nchan1 && chan_list1[i] == tmp; i++);
for (; j < nchan2 && chan_list2[j] == tmp; j++);
d_chan_list[k++] = tmp;
}
while (i < nchan1) {
tmp = chan_list1[i++];
for (; i < nchan1 && chan_list1[i] == tmp; i++);
d_chan_list[k++] = tmp;
}
while (j < nchan2) {
tmp = chan_list2[j++];
for (; j < nchan2 && chan_list2[j] == tmp; j++);
d_chan_list[k++] = tmp;
}
*nchan = k;
return err;
}
static int
_dhd_pno_get_channels(dhd_pub_t *dhd, uint16 *d_chan_list,
int *nchan, uint8 band, bool skip_dfs)
{
int err = BCME_OK;
int i, j;
uint32 chan_buf[WL_NUMCHANNELS + 1];
wl_uint32_list_t *list;
NULL_CHECK(dhd, "dhd is NULL", err);
if (*nchan) {
NULL_CHECK(d_chan_list, "d_chan_list is NULL", err);
}
memset(&chan_buf, 0, sizeof(chan_buf));
list = (wl_uint32_list_t *) (void *)chan_buf;
list->count = htod32(WL_NUMCHANNELS);
err = dhd_wl_ioctl_cmd(dhd, WLC_GET_VALID_CHANNELS, chan_buf, sizeof(chan_buf), FALSE, 0);
if (err < 0) {
DHD_ERROR(("failed to get channel list (err: %d)\n", err));
return err;
}
for (i = 0, j = 0; i < dtoh32(list->count) && i < *nchan; i++) {
if (IS_2G_CHANNEL(dtoh32(list->element[i]))) {
if (!(band & WLC_BAND_2G)) {
/* Skip, if not 2g */
continue;
}
/* fall through to include the channel */
} else if (IS_5G_CHANNEL(dtoh32(list->element[i]))) {
bool dfs_channel = is_dfs(dhd, dtoh32(list->element[i]));
if ((skip_dfs && dfs_channel) ||
(!(band & WLC_BAND_5G) && !dfs_channel)) {
/* Skip the channel if:
* the DFS bit is NOT set & the channel is a dfs channel
* the band 5G is not set & the channel is a non DFS 5G channel
*/
continue;
}
/* fall through to include the channel */
} else {
/* Not in range. Bad channel */
DHD_ERROR(("Not in range. bad channel\n"));
*nchan = 0;
return BCME_BADCHAN;
}
/* Include the channel */
d_chan_list[j++] = (uint16) dtoh32(list->element[i]);
}
*nchan = j;
return err;
}
static int
_dhd_pno_convert_format(dhd_pub_t *dhd, struct dhd_pno_batch_params *params_batch,
char *buf, int nbufsize)
{
int err = BCME_OK;
int bytes_written = 0, nreadsize = 0;
int t_delta = 0;
int nleftsize = nbufsize;
uint8 cnt = 0;
char *bp = buf;
char eabuf[ETHER_ADDR_STR_LEN];
#ifdef PNO_DEBUG
char *_base_bp;
char msg[150];
#endif
dhd_pno_bestnet_entry_t *iter, *next;
dhd_pno_scan_results_t *siter, *snext;
dhd_pno_best_header_t *phead, *pprev;
NULL_CHECK(params_batch, "params_batch is NULL", err);
if (nbufsize > 0)
NULL_CHECK(buf, "buf is NULL", err);
/* initialize the buffer */
memset(buf, 0, nbufsize);
DHD_PNO(("%s enter \n", __FUNCTION__));
/* # of scans */
if (!params_batch->get_batch.batch_started) {
bp += nreadsize = snprintf(bp, nleftsize, "scancount=%d\n",
params_batch->get_batch.expired_tot_scan_cnt);
nleftsize -= nreadsize;
params_batch->get_batch.batch_started = TRUE;
}
DHD_PNO(("%s scancount %d\n", __FUNCTION__, params_batch->get_batch.expired_tot_scan_cnt));
/* preestimate scan count until which scan result this report is going to end */
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
list_for_each_entry_safe(siter, snext,
¶ms_batch->get_batch.expired_scan_results_list, list) {
GCC_DIAGNOSTIC_POP();
phead = siter->bestnetheader;
while (phead != NULL) {
/* if left_size is less than bestheader total size , stop this */
if (nleftsize <=
(phead->tot_size + phead->tot_cnt * ENTRY_OVERHEAD))
goto exit;
/* increase scan count */
cnt++;
/* # best of each scan */
DHD_PNO(("\n<loop : %d, apcount %d>\n", cnt - 1, phead->tot_cnt));
/* attribute of the scan */
if (phead->reason & PNO_STATUS_ABORT_MASK) {
bp += nreadsize = snprintf(bp, nleftsize, "trunc\n");
nleftsize -= nreadsize;
}
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
list_for_each_entry_safe(iter, next,
&phead->entry_list, list) {
GCC_DIAGNOSTIC_POP();
t_delta = jiffies_to_msecs(jiffies - iter->recorded_time);
#ifdef PNO_DEBUG
_base_bp = bp;
memset(msg, 0, sizeof(msg));
#endif
/* BSSID info */
bp += nreadsize = snprintf(bp, nleftsize, "bssid=%s\n",
bcm_ether_ntoa((const struct ether_addr *)&iter->BSSID, eabuf));
nleftsize -= nreadsize;
/* SSID */
bp += nreadsize = snprintf(bp, nleftsize, "ssid=%s\n", iter->SSID);
nleftsize -= nreadsize;
/* channel */
bp += nreadsize = snprintf(bp, nleftsize, "freq=%d\n",
wl_channel_to_frequency(wf_chspec_ctlchan(iter->channel),
CHSPEC_BAND(iter->channel)));
nleftsize -= nreadsize;
/* RSSI */
bp += nreadsize = snprintf(bp, nleftsize, "level=%d\n", iter->RSSI);
nleftsize -= nreadsize;
/* add the time consumed in Driver to the timestamp of firmware */
iter->timestamp += t_delta;
bp += nreadsize = snprintf(bp, nleftsize,
"age=%d\n", iter->timestamp);
nleftsize -= nreadsize;
/* RTT0 */
bp += nreadsize = snprintf(bp, nleftsize, "dist=%d\n",
(iter->rtt0 == 0)? -1 : iter->rtt0);
nleftsize -= nreadsize;
/* RTT1 */
bp += nreadsize = snprintf(bp, nleftsize, "distSd=%d\n",
(iter->rtt0 == 0)? -1 : iter->rtt1);
nleftsize -= nreadsize;
bp += nreadsize = snprintf(bp, nleftsize, "%s", AP_END_MARKER);
nleftsize -= nreadsize;
list_del(&iter->list);
MFREE(dhd->osh, iter, BESTNET_ENTRY_SIZE);
#ifdef PNO_DEBUG
memcpy(msg, _base_bp, bp - _base_bp);
DHD_PNO(("Entry : \n%s", msg));
#endif
}
bp += nreadsize = snprintf(bp, nleftsize, "%s", SCAN_END_MARKER);
DHD_PNO(("%s", SCAN_END_MARKER));
nleftsize -= nreadsize;
pprev = phead;
/* reset the header */
siter->bestnetheader = phead = phead->next;
MFREE(dhd->osh, pprev, BEST_HEADER_SIZE);
siter->cnt_header--;
}
if (phead == NULL) {
/* we store all entry in this scan , so it is ok to delete */
list_del(&siter->list);
MFREE(dhd->osh, siter, SCAN_RESULTS_SIZE);
}
}
exit:
if (cnt < params_batch->get_batch.expired_tot_scan_cnt) {
DHD_ERROR(("Buffer size is small to save all batch entry,"
" cnt : %d (remained_scan_cnt): %d\n",
cnt, params_batch->get_batch.expired_tot_scan_cnt - cnt));
}
params_batch->get_batch.expired_tot_scan_cnt -= cnt;
/* set FALSE only if the link list is empty after returning the data */
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
if (list_empty(¶ms_batch->get_batch.expired_scan_results_list)) {
GCC_DIAGNOSTIC_POP();
params_batch->get_batch.batch_started = FALSE;
bp += snprintf(bp, nleftsize, "%s", RESULTS_END_MARKER);
DHD_PNO(("%s", RESULTS_END_MARKER));
DHD_PNO(("%s : Getting the batching data is complete\n", __FUNCTION__));
}
/* return used memory in buffer */
bytes_written = (int32)(bp - buf);
return bytes_written;
}
static int
_dhd_pno_clear_all_batch_results(dhd_pub_t *dhd, struct list_head *head, bool only_last)
{
int err = BCME_OK;
int removed_scan_cnt = 0;
dhd_pno_scan_results_t *siter, *snext;
dhd_pno_best_header_t *phead, *pprev;
dhd_pno_bestnet_entry_t *iter, *next;
NULL_CHECK(dhd, "dhd is NULL", err);
NULL_CHECK(head, "head is NULL", err);
NULL_CHECK(head->next, "head->next is NULL", err);
DHD_PNO(("%s enter\n", __FUNCTION__));
GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
list_for_each_entry_safe(siter, snext,
head, list) {
if (only_last) {
/* in case that we need to delete only last one */
if (!list_is_last(&siter->list, head)) {
/* skip if the one is not last */
continue;
}
}
/* delete all data belong if the one is last */
phead = siter->bestnetheader;
while (phead != NULL) {
removed_scan_cnt++;
list_for_each_entry_safe(iter, next,
&phead->entry_list, list) {