diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/scan.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/scan.c | 462 |
1 files changed, 447 insertions, 15 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c index 621fb71f282..dff7592e1ff 100644 --- a/drivers/net/wireless/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/iwlwifi/mvm/scan.c @@ -74,8 +74,12 @@ static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) { u16 rx_chain; - u8 rx_ant = iwl_fw_valid_rx_ant(mvm->fw); + u8 rx_ant; + if (mvm->scan_rx_ant != ANT_NONE) + rx_ant = mvm->scan_rx_ant; + else + rx_ant = iwl_fw_valid_rx_ant(mvm->fw); rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; @@ -93,10 +97,10 @@ static inline __le32 iwl_mvm_scan_max_out_time(struct ieee80211_vif *vif) static inline __le32 iwl_mvm_scan_suspend_time(struct ieee80211_vif *vif) { - if (vif->bss_conf.assoc) - return cpu_to_le32(vif->bss_conf.beacon_int); - else + if (!vif->bss_conf.assoc) return 0; + + return cpu_to_le32(ieee80211_tu_to_usec(vif->bss_conf.beacon_int)); } static inline __le32 @@ -133,11 +137,12 @@ iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band, * request. */ static void iwl_mvm_scan_fill_ssids(struct iwl_scan_cmd *cmd, - struct cfg80211_scan_request *req) + struct cfg80211_scan_request *req, + int first) { int fw_idx, req_idx; - for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx > 0; + for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx >= first; req_idx--, fw_idx++) { cmd->direct_scan[fw_idx].id = WLAN_EID_SSID; cmd->direct_scan[fw_idx].len = req->ssids[req_idx].ssid_len; @@ -153,9 +158,9 @@ static void iwl_mvm_scan_fill_ssids(struct iwl_scan_cmd *cmd, * just to notify that this scan is active and not passive. * In order to notify the FW of the number of SSIDs we wish to scan (including * the zero-length one), we need to set the corresponding bits in chan->type, - * one for each SSID, and set the active bit (first). The first SSID is already - * included in the probe template, so we need to set only req->n_ssids - 1 bits - * in addition to the first bit. + * one for each SSID, and set the active bit (first). If the first SSID is + * already included in the probe template, so we need to set only + * req->n_ssids - 1 bits in addition to the first bit. */ static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids) { @@ -170,7 +175,8 @@ static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band) } static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd, - struct cfg80211_scan_request *req) + struct cfg80211_scan_request *req, + bool basic_ssid) { u16 passive_dwell = iwl_mvm_get_passive_dwell(req->channels[0]->band); u16 active_dwell = iwl_mvm_get_active_dwell(req->channels[0]->band, @@ -178,10 +184,14 @@ static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd, struct iwl_scan_channel *chan = (struct iwl_scan_channel *) (cmd->data + le16_to_cpu(cmd->tx_cmd.len)); int i; + int type = BIT(req->n_ssids) - 1; + + if (!basic_ssid) + type |= BIT(req->n_ssids); for (i = 0; i < cmd->channel_count; i++) { chan->channel = cpu_to_le16(req->channels[i]->hw_value); - chan->type = cpu_to_le32(BIT(req->n_ssids) - 1); + chan->type = cpu_to_le32(type); if (req->channels[i]->flags & IEEE80211_CHAN_PASSIVE_SCAN) chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE); chan->active_dwell = cpu_to_le16(active_dwell); @@ -268,6 +278,8 @@ int iwl_mvm_scan_request(struct iwl_mvm *mvm, u32 status; int ssid_len = 0; u8 *ssid = NULL; + bool basic_ssid = !(mvm->fw->ucode_capa.flags & + IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID); lockdep_assert_held(&mvm->mutex); BUG_ON(mvm->scan_cmd == NULL); @@ -302,14 +314,16 @@ int iwl_mvm_scan_request(struct iwl_mvm *mvm, if (req->n_ssids > 0) { cmd->passive2active = cpu_to_le16(1); cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE; - ssid = req->ssids[0].ssid; - ssid_len = req->ssids[0].ssid_len; + if (basic_ssid) { + ssid = req->ssids[0].ssid; + ssid_len = req->ssids[0].ssid_len; + } } else { cmd->passive2active = 0; cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE; } - iwl_mvm_scan_fill_ssids(cmd, req); + iwl_mvm_scan_fill_ssids(cmd, req, basic_ssid ? 1 : 0); cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL); cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id; @@ -326,7 +340,7 @@ int iwl_mvm_scan_request(struct iwl_mvm *mvm, req->ie, req->ie_len, mvm->fw->ucode_capa.max_probe_length)); - iwl_mvm_scan_fill_channels(cmd, req); + iwl_mvm_scan_fill_channels(cmd, req, basic_ssid); cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) + le16_to_cpu(cmd->tx_cmd.len) + @@ -377,6 +391,21 @@ int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, return 0; } +int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_sched_scan_results *notif = (void *)pkt->data; + + if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) { + IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); + ieee80211_sched_scan_results(mvm->hw); + } + + return 0; +} + static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait, struct iwl_rx_packet *pkt, void *data) { @@ -447,3 +476,406 @@ void iwl_mvm_cancel_scan(struct iwl_mvm *mvm) out_remove_notif: iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort); } + +int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data; + + IWL_DEBUG_SCAN(mvm, "Scheduled scan completed, status %s\n", + scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? + "completed" : "aborted"); + + mvm->scan_status = IWL_MVM_SCAN_NONE; + ieee80211_sched_scan_stopped(mvm->hw); + + return 0; +} + +static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct ieee80211_sched_scan_ies *ies, + enum ieee80211_band band, + struct iwl_tx_cmd *cmd, + u8 *data) +{ + u16 cmd_len; + + cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL); + cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); + cmd->sta_id = mvm->aux_sta.sta_id; + + cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false); + + cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data, + vif->addr, + 1, NULL, 0, + ies->ie[band], ies->len[band], + SCAN_OFFLOAD_PROBE_REQ_SIZE); + cmd->len = cpu_to_le16(cmd_len); +} + +static void iwl_build_scan_cmd(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct iwl_scan_offload_cmd *scan) +{ + scan->channel_count = + mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + + mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; + scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); + scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); + scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT; + scan->rx_chain = iwl_mvm_scan_rx_chain(mvm); + scan->max_out_time = cpu_to_le32(200 * 1024); + scan->suspend_time = iwl_mvm_scan_suspend_time(vif); + scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP | + MAC_FILTER_IN_BEACON); + scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND); + scan->rep_count = cpu_to_le32(1); +} + +static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) +{ + int i; + + for (i = 0; i < PROBE_OPTION_MAX; i++) { + if (!ssid_list[i].len) + break; + if (ssid_list[i].len == ssid_len && + !memcmp(ssid_list->ssid, ssid, ssid_len)) + return i; + } + return -1; +} + +static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req, + struct iwl_scan_offload_cmd *scan, + u32 *ssid_bitmap) +{ + int i, j; + int index; + + /* + * copy SSIDs from match list. + * iwl_config_sched_scan_profiles() uses the order of these ssids to + * config match list. + */ + for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) { + scan->direct_scan[i].id = WLAN_EID_SSID; + scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len; + memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid, + scan->direct_scan[i].len); + } + + /* add SSIDs from scan SSID list */ + *ssid_bitmap = 0; + for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) { + index = iwl_ssid_exist(req->ssids[j].ssid, + req->ssids[j].ssid_len, + scan->direct_scan); + if (index < 0) { + if (!req->ssids[j].ssid_len) + continue; + scan->direct_scan[i].id = WLAN_EID_SSID; + scan->direct_scan[i].len = req->ssids[j].ssid_len; + memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid, + scan->direct_scan[i].len); + *ssid_bitmap |= BIT(i + 1); + i++; + } else { + *ssid_bitmap |= BIT(index + 1); + } + } +} + +static void iwl_build_channel_cfg(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req, + struct iwl_scan_channel_cfg *channels, + enum ieee80211_band band, + int *head, int *tail, + u32 ssid_bitmap) +{ + struct ieee80211_supported_band *s_band; + int n_probes = req->n_ssids; + int n_channels = req->n_channels; + u8 active_dwell, passive_dwell; + int i, j, index = 0; + bool partial; + + /* + * We have to configure all supported channels, even if we don't want to + * scan on them, but we have to send channels in the order that we want + * to scan. So add requested channels to head of the list and others to + * the end. + */ + active_dwell = iwl_mvm_get_active_dwell(band, n_probes); + passive_dwell = iwl_mvm_get_passive_dwell(band); + s_band = &mvm->nvm_data->bands[band]; + + for (i = 0; i < s_band->n_channels && *head <= *tail; i++) { + partial = false; + for (j = 0; j < n_channels; j++) + if (s_band->channels[i].center_freq == + req->channels[j]->center_freq) { + index = *head; + (*head)++; + /* + * Channels that came with the request will be + * in partial scan . + */ + partial = true; + break; + } + if (!partial) { + index = *tail; + (*tail)--; + } + channels->channel_number[index] = + cpu_to_le16(ieee80211_frequency_to_channel( + s_band->channels[i].center_freq)); + channels->dwell_time[index][0] = active_dwell; + channels->dwell_time[index][1] = passive_dwell; + + channels->iter_count[index] = cpu_to_le16(1); + channels->iter_interval[index] = 0; + + if (!(s_band->channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) + channels->type[index] |= + cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE); + + channels->type[index] |= + cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL); + if (partial) + channels->type[index] |= + cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL); + + if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40) + channels->type[index] |= + cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW); + + /* scan for all SSIDs from req->ssids */ + channels->type[index] |= cpu_to_le32(ssid_bitmap); + } +} + +int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_sched_scan_ies *ies) +{ + int supported_bands = 0; + int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels; + int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; + int head = 0; + int tail = band_2ghz + band_5ghz; + u32 ssid_bitmap; + int cmd_len; + int ret; + + struct iwl_scan_offload_cfg *scan_cfg; + struct iwl_host_cmd cmd = { + .id = SCAN_OFFLOAD_CONFIG_CMD, + .flags = CMD_SYNC, + }; + + lockdep_assert_held(&mvm->mutex); + + if (band_2ghz) + supported_bands++; + if (band_5ghz) + supported_bands++; + + cmd_len = sizeof(struct iwl_scan_offload_cfg) + + supported_bands * SCAN_OFFLOAD_PROBE_REQ_SIZE; + + scan_cfg = kzalloc(cmd_len, GFP_KERNEL); + if (!scan_cfg) + return -ENOMEM; + + iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd); + scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len); + + iwl_scan_offload_build_ssid(req, &scan_cfg->scan_cmd, &ssid_bitmap); + /* build tx frames for supported bands */ + if (band_2ghz) { + iwl_scan_offload_build_tx_cmd(mvm, vif, ies, + IEEE80211_BAND_2GHZ, + &scan_cfg->scan_cmd.tx_cmd[0], + scan_cfg->data); + iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, + IEEE80211_BAND_2GHZ, &head, &tail, + ssid_bitmap); + } + if (band_5ghz) { + iwl_scan_offload_build_tx_cmd(mvm, vif, ies, + IEEE80211_BAND_5GHZ, + &scan_cfg->scan_cmd.tx_cmd[1], + scan_cfg->data + + SCAN_OFFLOAD_PROBE_REQ_SIZE); + iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, + IEEE80211_BAND_5GHZ, &head, &tail, + ssid_bitmap); + } + + cmd.data[0] = scan_cfg; + cmd.len[0] = cmd_len; + cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; + + IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n"); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + kfree(scan_cfg); + return ret; +} + +int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req) +{ + struct iwl_scan_offload_profile *profile; + struct iwl_scan_offload_profile_cfg *profile_cfg; + struct iwl_scan_offload_blacklist *blacklist; + struct iwl_host_cmd cmd = { + .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, + .flags = CMD_SYNC, + .len[1] = sizeof(*profile_cfg), + .dataflags[0] = IWL_HCMD_DFL_NOCOPY, + .dataflags[1] = IWL_HCMD_DFL_NOCOPY, + }; + int blacklist_len; + int i; + int ret; + + if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) + return -EIO; + + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) + blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; + else + blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; + + blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); + if (!blacklist) + return -ENOMEM; + + profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); + if (!profile_cfg) { + ret = -ENOMEM; + goto free_blacklist; + } + + cmd.data[0] = blacklist; + cmd.len[0] = sizeof(*blacklist) * blacklist_len; + cmd.data[1] = profile_cfg; + + /* No blacklist configuration */ + + profile_cfg->num_profiles = req->n_match_sets; + profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; + profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; + profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; + + for (i = 0; i < req->n_match_sets; i++) { + profile = &profile_cfg->profiles[i]; + profile->ssid_index = i; + /* Support any cipher and auth algorithm */ + profile->unicast_cipher = 0xff; + profile->auth_alg = 0xff; + profile->network_type = IWL_NETWORK_TYPE_ANY; + profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; + profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; + } + + IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + kfree(profile_cfg); +free_blacklist: + kfree(blacklist); + + return ret; +} + +int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req) +{ + struct iwl_scan_offload_req scan_req = { + .watchdog = IWL_SCHED_SCAN_WATCHDOG, + + .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS, + .schedule_line[0].delay = req->interval / 1000, + .schedule_line[0].full_scan_mul = 1, + + .schedule_line[1].iterations = 0xff, + .schedule_line[1].delay = req->interval / 1000, + .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER, + }; + + if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { + IWL_DEBUG_SCAN(mvm, + "Sending scheduled scan with filtering, filter len %d\n", + req->n_match_sets); + scan_req.flags |= + cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_FILTER_SSID); + } else { + IWL_DEBUG_SCAN(mvm, + "Sending Scheduled scan without filtering\n"); + } + + return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, CMD_SYNC, + sizeof(scan_req), &scan_req); +} + +static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm) +{ + int ret; + struct iwl_host_cmd cmd = { + .id = SCAN_OFFLOAD_ABORT_CMD, + .flags = CMD_SYNC, + }; + u32 status; + + /* Exit instantly with error when device is not ready + * to receive scan abort command or it does not perform + * scheduled scan currently */ + if (mvm->scan_status != IWL_MVM_SCAN_SCHED) + return -EIO; + + ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); + if (ret) + return ret; + + if (status != 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. + */ + IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); + ret = -EIO; + } + + return ret; +} + +void iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm) +{ + int ret; + + lockdep_assert_held(&mvm->mutex); + + if (mvm->scan_status != IWL_MVM_SCAN_SCHED) { + IWL_DEBUG_SCAN(mvm, "No offloaded scan to stop\n"); + return; + } + + ret = iwl_mvm_send_sched_scan_abort(mvm); + if (ret) + IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret); + else + IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n"); +} |