/* * spectrum management * * Copyright 2003, Jouni Malinen * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc * Copyright 2007, Michael Wu * Copyright 2007-2008, Intel Corporation * Copyright 2008, Johannes Berg * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include "ieee80211_i.h" #include "sta_info.h" #include "wme.h" int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems, enum nl80211_band current_band, u32 sta_flags, u8 *bssid, struct ieee80211_csa_ie *csa_ie) { enum nl80211_band new_band; int new_freq; u8 new_chan_no; struct ieee80211_channel *new_chan; struct cfg80211_chan_def new_vht_chandef = {}; const struct ieee80211_sec_chan_offs_ie *sec_chan_offs; const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie; int secondary_channel_offset = -1; sec_chan_offs = elems->sec_chan_offs; wide_bw_chansw_ie = elems->wide_bw_chansw_ie; if (sta_flags & (IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ)) { sec_chan_offs = NULL; wide_bw_chansw_ie = NULL; } if (sta_flags & IEEE80211_STA_DISABLE_VHT) wide_bw_chansw_ie = NULL; if (elems->ext_chansw_ie) { if (!ieee80211_operating_class_to_band( elems->ext_chansw_ie->new_operating_class, &new_band)) { sdata_info(sdata, "cannot understand ECSA IE operating class %d, disconnecting\n", elems->ext_chansw_ie->new_operating_class); return -EINVAL; } new_chan_no = elems->ext_chansw_ie->new_ch_num; csa_ie->count = elems->ext_chansw_ie->count; csa_ie->mode = elems->ext_chansw_ie->mode; } else if (elems->ch_switch_ie) { new_band = current_band; new_chan_no = elems->ch_switch_ie->new_ch_num; csa_ie->count = elems->ch_switch_ie->count; csa_ie->mode = elems->ch_switch_ie->mode; } else { /* nothing here we understand */ return 1; } /* Mesh Channel Switch Parameters Element */ if (elems->mesh_chansw_params_ie) { csa_ie->ttl = elems->mesh_chansw_params_ie->mesh_ttl; csa_ie->mode = elems->mesh_chansw_params_ie->mesh_flags; csa_ie->pre_value = le16_to_cpu( elems->mesh_chansw_params_ie->mesh_pre_value); } new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band); new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) { sdata_info(sdata, "BSS %pM switches to unsupported channel (%d MHz), disconnecting\n", bssid, new_freq); return -EINVAL; } if (sec_chan_offs) { secondary_channel_offset = sec_chan_offs->sec_chan_offs; } else if (!(sta_flags & IEEE80211_STA_DISABLE_HT)) { /* If the secondary channel offset IE is not present, * we can't know what's the post-CSA offset, so the * best we can do is use 20MHz. */ secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; } switch (secondary_channel_offset) { default: /* secondary_channel_offset was present but is invalid */ case IEEE80211_HT_PARAM_CHA_SEC_NONE: cfg80211_chandef_create(&csa_ie->chandef, new_chan, NL80211_CHAN_HT20); break; case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: cfg80211_chandef_create(&csa_ie->chandef, new_chan, NL80211_CHAN_HT40PLUS); break; case IEEE80211_HT_PARAM_CHA_SEC_BELOW: cfg80211_chandef_create(&csa_ie->chandef, new_chan, NL80211_CHAN_HT40MINUS); break; case -1: cfg80211_chandef_create(&csa_ie->chandef, new_chan, NL80211_CHAN_NO_HT); /* keep width for 5/10 MHz channels */ switch (sdata->vif.bss_conf.chandef.width) { case NL80211_CHAN_WIDTH_5: case NL80211_CHAN_WIDTH_10: csa_ie->chandef.width = sdata->vif.bss_conf.chandef.width; break; default: break; } break; } if (wide_bw_chansw_ie) { struct ieee80211_vht_operation vht_oper = { .chan_width = wide_bw_chansw_ie->new_channel_width, .center_freq_seg1_idx = wide_bw_chansw_ie->new_center_freq_seg0, .center_freq_seg2_idx = wide_bw_chansw_ie->new_center_freq_seg1, /* .basic_mcs_set doesn't matter */ }; /* default, for the case of IEEE80211_VHT_CHANWIDTH_USE_HT, * to the previously parsed chandef */ new_vht_chandef = csa_ie->chandef; /* ignore if parsing fails */ if (!ieee80211_chandef_vht_oper(&vht_oper, &new_vht_chandef)) new_vht_chandef.chan = NULL; if (sta_flags & IEEE80211_STA_DISABLE_80P80MHZ && new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80) ieee80211_chandef_downgrade(&new_vht_chandef); if (sta_flags & IEEE80211_STA_DISABLE_160MHZ && new_vht_chandef.width == NL80211_CHAN_WIDTH_160) ieee80211_chandef_downgrade(&new_vht_chandef); } /* if VHT data is there validate & use it */ if (new_vht_chandef.chan) { if (!cfg80211_chandef_compatible(&new_vht_chandef, &csa_ie->chandef)) { sdata_info(sdata, "BSS %pM: CSA has inconsistent channel data, disconnecting\n", bssid); return -EINVAL; } csa_ie->chandef = new_vht_chandef; } return 0; } static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, struct ieee80211_msrment_ie *request_ie, const u8 *da, const u8 *bssid, u8 dialog_token) { struct ieee80211_local *local = sdata->local; struct sk_buff *skb; struct ieee80211_mgmt *msr_report; skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + sizeof(struct ieee80211_msrment_ie)); if (!skb) return; skb_reserve(skb, local->hw.extra_tx_headroom); msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); memset(msr_report, 0, 24); memcpy(msr_report->da, da, ETH_ALEN); memcpy(msr_report->sa, sdata->vif.addr, ETH_ALEN); memcpy(msr_report->bssid, bssid, ETH_ALEN); msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; msr_report->u.action.u.measurement.action_code = WLAN_ACTION_SPCT_MSR_RPRT; msr_report->u.action.u.measurement.dialog_token = dialog_token; msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; msr_report->u.action.u.measurement.length = sizeof(struct ieee80211_msrment_ie); memset(&msr_report->u.action.u.measurement.msr_elem, 0, sizeof(struct ieee80211_msrment_ie)); msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; msr_report->u.action.u.measurement.msr_elem.mode |= IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; ieee80211_tx_skb(sdata, skb); } void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) { /* * Ignoring measurement request is spec violation. * Mandatory measurements must be reported optional * measurements might be refused or reported incapable * For now just refuse * TODO: Answer basic measurement as unmeasured */ ieee80211_send_refuse_measurement_request(sdata, &mgmt->u.action.u.measurement.msr_elem, mgmt->sa, mgmt->bssid, mgmt->u.action.u.measurement.dialog_token); } at the end of `pl330_remove', but I assume that there cannot be concurrent accesses to the protected data at those points. Signed-off-by: Iago Abal <mail@iagoabal.eu> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include/drm/drm_debugfs_crc.h')