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Release 4.11 drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c

/*
 * Copyright (c) 2016 Broadcom
 *
 * Permission to use, copy, modify, and/or 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 <linux/netdevice.h>
#include <net/cfg80211.h>

#include "core.h"
#include "debug.h"
#include "fwil.h"
#include "fwil_types.h"
#include "cfg80211.h"
#include "pno.h"


#define BRCMF_PNO_VERSION		2

#define BRCMF_PNO_REPEAT		4

#define BRCMF_PNO_FREQ_EXPO_MAX		3

#define BRCMF_PNO_IMMEDIATE_SCAN_BIT	3

#define BRCMF_PNO_ENABLE_BD_SCAN_BIT	5

#define BRCMF_PNO_ENABLE_ADAPTSCAN_BIT	6

#define BRCMF_PNO_REPORT_SEPARATELY_BIT	11

#define BRCMF_PNO_SCAN_INCOMPLETE	0

#define BRCMF_PNO_WPA_AUTH_ANY		0xFFFFFFFF

#define BRCMF_PNO_HIDDEN_BIT		2

#define BRCMF_PNO_SCHED_SCAN_PERIOD	30


static int brcmf_pno_channel_config(struct brcmf_if *ifp, struct brcmf_pno_config_le *cfg) { cfg->reporttype = 0; cfg->flags = 0; return brcmf_fil_iovar_data_set(ifp, "pfn_cfg", cfg, sizeof(*cfg)); }

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static int brcmf_pno_config(struct brcmf_if *ifp, u32 scan_freq, u32 mscan, u32 bestn) { struct brcmf_pno_param_le pfn_param; u16 flags; u32 pfnmem; s32 err; memset(&pfn_param, 0, sizeof(pfn_param)); pfn_param.version = cpu_to_le32(BRCMF_PNO_VERSION); /* set extra pno params */ flags = BIT(BRCMF_PNO_IMMEDIATE_SCAN_BIT) | BIT(BRCMF_PNO_REPORT_SEPARATELY_BIT) | BIT(BRCMF_PNO_ENABLE_ADAPTSCAN_BIT); pfn_param.repeat = BRCMF_PNO_REPEAT; pfn_param.exp = BRCMF_PNO_FREQ_EXPO_MAX; /* set up pno scan fr */ if (scan_freq < BRCMF_PNO_SCHED_SCAN_MIN_PERIOD) { brcmf_dbg(SCAN, "scan period too small, using minimum\n"); scan_freq = BRCMF_PNO_SCHED_SCAN_MIN_PERIOD; } pfn_param.scan_freq = cpu_to_le32(scan_freq); if (mscan) { pfnmem = bestn; /* set bestn in firmware */ err = brcmf_fil_iovar_int_set(ifp, "pfnmem", pfnmem); if (err < 0) { brcmf_err("failed to set pfnmem\n"); goto exit; } /* get max mscan which the firmware supports */ err = brcmf_fil_iovar_int_get(ifp, "pfnmem", &pfnmem); if (err < 0) { brcmf_err("failed to get pfnmem\n"); goto exit; } mscan = min_t(u32, mscan, pfnmem); pfn_param.mscan = mscan; pfn_param.bestn = bestn; flags |= BIT(BRCMF_PNO_ENABLE_BD_SCAN_BIT); brcmf_dbg(INFO, "mscan=%d, bestn=%d\n", mscan, bestn); } pfn_param.flags = cpu_to_le16(flags); err = brcmf_fil_iovar_data_set(ifp, "pfn_set", &pfn_param, sizeof(pfn_param)); if (err) brcmf_err("pfn_set failed, err=%d\n", err); exit: return err; }

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static int brcmf_pno_set_random(struct brcmf_if *ifp, u8 *mac_addr, u8 *mac_mask) { struct brcmf_pno_macaddr_le pfn_mac; int err, i; pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER; pfn_mac.flags = BRCMF_PFN_MAC_OUI_ONLY | BRCMF_PFN_SET_MAC_UNASSOC; memcpy(pfn_mac.mac, mac_addr, ETH_ALEN); for (i = 0; i < ETH_ALEN; i++) { pfn_mac.mac[i] &= mac_mask[i]; pfn_mac.mac[i] |= get_random_int() & ~(mac_mask[i]); } /* Clear multi bit */ pfn_mac.mac[0] &= 0xFE; /* Set locally administered */ pfn_mac.mac[0] |= 0x02; err = brcmf_fil_iovar_data_set(ifp, "pfn_macaddr", &pfn_mac, sizeof(pfn_mac)); if (err) brcmf_err("pfn_macaddr failed, err=%d\n", err); return err; }

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static int brcmf_pno_add_ssid(struct brcmf_if *ifp, struct cfg80211_ssid *ssid, bool active) { struct brcmf_pno_net_param_le pfn; pfn.auth = cpu_to_le32(WLAN_AUTH_OPEN); pfn.wpa_auth = cpu_to_le32(BRCMF_PNO_WPA_AUTH_ANY); pfn.wsec = cpu_to_le32(0); pfn.infra = cpu_to_le32(1); pfn.flags = 0; if (active) pfn.flags = cpu_to_le32(1 << BRCMF_PNO_HIDDEN_BIT); pfn.ssid.SSID_len = cpu_to_le32(ssid->ssid_len); memcpy(pfn.ssid.SSID, ssid->ssid, ssid->ssid_len); return brcmf_fil_iovar_data_set(ifp, "pfn_add", &pfn, sizeof(pfn)); }

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static bool brcmf_is_ssid_active(struct cfg80211_ssid *ssid, struct cfg80211_sched_scan_request *req) { int i; if (!ssid || !req->ssids || !req->n_ssids) return false; for (i = 0; i < req->n_ssids; i++) { if (ssid->ssid_len == req->ssids[i].ssid_len) { if (!strncmp(ssid->ssid, req->ssids[i].ssid, ssid->ssid_len)) return true; } } return false; }

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int brcmf_pno_clean(struct brcmf_if *ifp) { int ret; /* Disable pfn */ ret = brcmf_fil_iovar_int_set(ifp, "pfn", 0); if (ret == 0) { /* clear pfn */ ret = brcmf_fil_iovar_data_set(ifp, "pfnclear", NULL, 0); } if (ret < 0) brcmf_err("failed code %d\n", ret); return ret; }

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int brcmf_pno_start_sched_scan(struct brcmf_if *ifp, struct cfg80211_sched_scan_request *req) { struct brcmu_d11inf *d11inf; struct brcmf_pno_config_le pno_cfg; struct cfg80211_ssid *ssid; u16 chan; int i, ret; /* clean up everything */ ret = brcmf_pno_clean(ifp); if (ret < 0) { brcmf_err("failed error=%d\n", ret); return ret; } /* configure pno */ ret = brcmf_pno_config(ifp, req->scan_plans[0].interval, 0, 0); if (ret < 0) return ret; /* configure random mac */ if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) { ret = brcmf_pno_set_random(ifp, req->mac_addr, req->mac_addr_mask); if (ret < 0) return ret; } /* configure channels to use */ d11inf = &ifp->drvr->config->d11inf; for (i = 0; i < req->n_channels; i++) { chan = req->channels[i]->hw_value; pno_cfg.channel_list[i] = cpu_to_le16(chan); } if (req->n_channels) { pno_cfg.channel_num = cpu_to_le32(req->n_channels); brcmf_pno_channel_config(ifp, &pno_cfg); } /* configure each match set */ for (i = 0; i < req->n_match_sets; i++) { ssid = &req->match_sets[i].ssid; if (!ssid->ssid_len) { brcmf_err("skip broadcast ssid\n"); continue; } ret = brcmf_pno_add_ssid(ifp, ssid, brcmf_is_ssid_active(ssid, req)); if (ret < 0) brcmf_dbg(SCAN, ">>> PNO filter %s for ssid (%s)\n", ret == 0 ? "set" : "failed", ssid->ssid); } /* Enable the PNO */ ret = brcmf_fil_iovar_int_set(ifp, "pfn", 1); if (ret < 0) brcmf_err("PNO enable failed!! ret=%d\n", ret); return ret; }

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