From: David Spinadel Date: Tue, 20 May 2014 09:46:37 +0000 (+0300) Subject: iwlwifi: mvm: implement UMAC scan API X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d24962214dd5930aa713213654721fe1fd7ed844;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git iwlwifi: mvm: implement UMAC scan API This API uses second CPU scan commands, and can support multiple simultaneous scans. Adding the new API, and adding new mechanisms to deal with up to 8 simultaneous scans instead of the old scan status. New scan API requires scan configuration for default scan parameters, adding it in _up flow. Also updating scan configuration after updating valid scan antennas via debugfs. Signed-off-by: David Spinadel Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- diff --git a/drivers/net/wireless/iwlwifi/iwl-fw.h b/drivers/net/wireless/iwlwifi/iwl-fw.h index 598065b053de..133022a7bf6f 100644 --- a/drivers/net/wireless/iwlwifi/iwl-fw.h +++ b/drivers/net/wireless/iwlwifi/iwl-fw.h @@ -145,6 +145,7 @@ enum iwl_ucode_tlv_api { /** * enum iwl_ucode_tlv_capa - ucode capabilities * @IWL_UCODE_TLV_CAPA_D0I3_SUPPORT: supports D0i3 + * @IWL_UCODE_TLV_CAPA_UMAC_SCAN: supports UMAC scan. * @IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT: supports insertion of current * tx power value into TPC Report action frame and Link Measurement Report * action frame @@ -158,6 +159,7 @@ enum iwl_ucode_tlv_api { */ enum iwl_ucode_tlv_capa { IWL_UCODE_TLV_CAPA_D0I3_SUPPORT = BIT(0), + IWL_UCODE_TLV_CAPA_UMAC_SCAN = BIT(2), IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT = BIT(8), IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT = BIT(9), IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT = BIT(10), diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c index 51b7116965ed..8212b00096f9 100644 --- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c @@ -936,7 +936,11 @@ iwl_dbgfs_scan_ant_rxchain_write(struct iwl_mvm *mvm, char *buf, if (scan_rx_ant & ~mvm->fw->valid_rx_ant) return -EINVAL; - mvm->scan_rx_ant = scan_rx_ant; + if (mvm->scan_rx_ant != scan_rx_ant) { + mvm->scan_rx_ant = scan_rx_ant; + if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) + iwl_mvm_config_scan(mvm); + } return count; } diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h index 1354c68f6468..7163eb391826 100644 --- a/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h +++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h @@ -794,4 +794,257 @@ struct iwl_periodic_scan_complete { __le32 reserved; } __packed; +/* UMAC Scan API */ + +/** + * struct iwl_mvm_umac_cmd_hdr - Command header for UMAC commands + * @size: size of the command (not including header) + * @reserved0: for future use and alignment + * @ver: API version number + */ +struct iwl_mvm_umac_cmd_hdr { + __le16 size; + u8 reserved0; + u8 ver; +} __packed; + +#define IWL_MVM_MAX_SIMULTANEOUS_SCANS 8 + +enum scan_config_flags { + SCAN_CONFIG_FLAG_ACTIVATE = BIT(0), + SCAN_CONFIG_FLAG_DEACTIVATE = BIT(1), + SCAN_CONFIG_FLAG_FORBID_CHUB_REQS = BIT(2), + SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS = BIT(3), + SCAN_CONFIG_FLAG_SET_TX_CHAINS = BIT(8), + SCAN_CONFIG_FLAG_SET_RX_CHAINS = BIT(9), + SCAN_CONFIG_FLAG_SET_AUX_STA_ID = BIT(10), + SCAN_CONFIG_FLAG_SET_ALL_TIMES = BIT(11), + SCAN_CONFIG_FLAG_SET_EFFECTIVE_TIMES = BIT(12), + SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS = BIT(13), + SCAN_CONFIG_FLAG_SET_LEGACY_RATES = BIT(14), + SCAN_CONFIG_FLAG_SET_MAC_ADDR = BIT(15), + SCAN_CONFIG_FLAG_SET_FRAGMENTED = BIT(16), + SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED = BIT(17), + SCAN_CONFIG_FLAG_SET_CAM_MODE = BIT(18), + SCAN_CONFIG_FLAG_CLEAR_CAM_MODE = BIT(19), + SCAN_CONFIG_FLAG_SET_PROMISC_MODE = BIT(20), + SCAN_CONFIG_FLAG_CLEAR_PROMISC_MODE = BIT(21), + + /* Bits 26-31 are for num of channels in channel_array */ +#define SCAN_CONFIG_N_CHANNELS(n) ((n) << 26) +}; + +enum scan_config_rates { + /* OFDM basic rates */ + SCAN_CONFIG_RATE_6M = BIT(0), + SCAN_CONFIG_RATE_9M = BIT(1), + SCAN_CONFIG_RATE_12M = BIT(2), + SCAN_CONFIG_RATE_18M = BIT(3), + SCAN_CONFIG_RATE_24M = BIT(4), + SCAN_CONFIG_RATE_36M = BIT(5), + SCAN_CONFIG_RATE_48M = BIT(6), + SCAN_CONFIG_RATE_54M = BIT(7), + /* CCK basic rates */ + SCAN_CONFIG_RATE_1M = BIT(8), + SCAN_CONFIG_RATE_2M = BIT(9), + SCAN_CONFIG_RATE_5M = BIT(10), + SCAN_CONFIG_RATE_11M = BIT(11), + + /* Bits 16-27 are for supported rates */ +#define SCAN_CONFIG_SUPPORTED_RATE(rate) ((rate) << 16) +}; + +enum iwl_channel_flags { + IWL_CHANNEL_FLAG_EBS = BIT(0), + IWL_CHANNEL_FLAG_ACCURATE_EBS = BIT(1), + IWL_CHANNEL_FLAG_EBS_ADD = BIT(2), + IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE = BIT(3), +}; + +/** + * struct iwl_scan_config + * @hdr: umac command header + * @flags: enum scan_config_flags + * @tx_chains: valid_tx antenna - ANT_* definitions + * @rx_chains: valid_rx antenna - ANT_* definitions + * @legacy_rates: default legacy rates - enum scan_config_rates + * @out_of_channel_time: default max out of serving channel time + * @suspend_time: default max suspend time + * @dwell_active: default dwell time for active scan + * @dwell_passive: default dwell time for passive scan + * @dwell_fragmented: default dwell time for fragmented scan + * @reserved: for future use and alignment + * @mac_addr: default mac address to be used in probes + * @bcast_sta_id: the index of the station in the fw + * @channel_flags: default channel flags - enum iwl_channel_flags + * scan_config_channel_flag + * @channel_array: default supported channels + */ +struct iwl_scan_config { + struct iwl_mvm_umac_cmd_hdr hdr; + __le32 flags; + __le32 tx_chains; + __le32 rx_chains; + __le32 legacy_rates; + __le32 out_of_channel_time; + __le32 suspend_time; + u8 dwell_active; + u8 dwell_passive; + u8 dwell_fragmented; + u8 reserved; + u8 mac_addr[ETH_ALEN]; + u8 bcast_sta_id; + u8 channel_flags; + u8 channel_array[]; +} __packed; /* SCAN_CONFIG_DB_CMD_API_S */ + +/** + * iwl_umac_scan_flags + *@IWL_UMAC_SCAN_FLAG_PREEMPTIVE: scan process triggered by this scan request + * can be preempted by other scan requests with higher priority. + * The low priority scan is aborted. + *@IWL_UMAC_SCAN_FLAG_START_NOTIF: notification will be sent to the driver + * when scan starts. + */ +enum iwl_umac_scan_flags { + IWL_UMAC_SCAN_FLAG_PREEMPTIVE = BIT(0), + IWL_UMAC_SCAN_FLAG_START_NOTIF = BIT(1), +}; + +enum iwl_umac_scan_uid_offsets { + IWL_UMAC_SCAN_UID_TYPE_OFFSET = 0, + IWL_UMAC_SCAN_UID_SEQ_OFFSET = 8, +}; + +enum iwl_umac_scan_general_flags { + IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC = BIT(0), + IWL_UMAC_SCAN_GEN_FLAGS_OVER_BT = BIT(1), + IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL = BIT(2), + IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE = BIT(3), + IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT = BIT(4), + IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE = BIT(5), + IWL_UMAC_SCAN_GEN_FLAGS_MULTIPLE_SSID = BIT(6), + IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED = BIT(7), + IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED = BIT(8), + IWL_UMAC_SCAN_GEN_FLAGS_MATCH = BIT(9) +}; + +/** + * struct iwl_scan_channel_cfg_umac + * @flags: bitmap - 0-19: directed scan to i'th ssid. + * @channel_num: channel number 1-13 etc. + * @iter_count: repetition count for the channel. + * @iter_interval: interval between two scan interations on one channel. + */ +struct iwl_scan_channel_cfg_umac { + __le32 flags; + u8 channel_num; + u8 iter_count; + __le16 iter_interval; +} __packed; /* SCAN_CHANNEL_CFG_S_VER2 */ + +/** + * struct iwl_scan_umac_schedule + * @interval: interval in seconds between scan iterations + * @iter_count: num of scan iterations for schedule plan, 0xff for infinite loop + * @reserved: for alignment and future use + */ +struct iwl_scan_umac_schedule { + __le16 interval; + u8 iter_count; + u8 reserved; +} __packed; /* SCAN_SCHED_PARAM_API_S_VER_1 */ + +/** + * struct iwl_scan_req_umac_tail - the rest of the UMAC scan request command + * parameters following channels configuration array. + * @schedule: two scheduling plans. + * @delay: delay in TUs before starting the first scan iteration + * @reserved: for future use and alignment + * @preq: probe request with IEs blocks + * @direct_scan: list of SSIDs for directed active scan + */ +struct iwl_scan_req_umac_tail { + /* SCAN_PERIODIC_PARAMS_API_S_VER_1 */ + struct iwl_scan_umac_schedule schedule[2]; + __le16 delay; + __le16 reserved; + /* SCAN_PROBE_PARAMS_API_S_VER_1 */ + struct iwl_scan_probe_req preq; + struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX]; +} __packed; + +/** + * struct iwl_scan_req_umac + * @hdr: umac command header + * @flags: &enum iwl_umac_scan_flags + * @uid: scan id, &enum iwl_umac_scan_uid_offsets + * @ooc_priority: out of channel priority - &enum iwl_scan_priority + * @general_flags: &enum iwl_umac_scan_general_flags + * @reserved1: for future use and alignment + * @active_dwell: dwell time for active scan + * @passive_dwell: dwell time for passive scan + * @fragmented_dwell: dwell time for fragmented passive scan + * @max_out_time: max out of serving channel time + * @suspend_time: max suspend time + * @scan_priority: scan internal prioritization &enum iwl_scan_priority + * @channel_flags: &enum iwl_scan_channel_flags + * @n_channels: num of channels in scan request + * @reserved2: for future use and alignment + * @data: &struct iwl_scan_channel_cfg_umac and + * &struct iwl_scan_req_umac_tail + */ +struct iwl_scan_req_umac { + struct iwl_mvm_umac_cmd_hdr hdr; + __le32 flags; + __le32 uid; + __le32 ooc_priority; + /* SCAN_GENERAL_PARAMS_API_S_VER_1 */ + __le32 general_flags; + u8 reserved1; + u8 active_dwell; + u8 passive_dwell; + u8 fragmented_dwell; + __le32 max_out_time; + __le32 suspend_time; + __le32 scan_priority; + /* SCAN_CHANNEL_PARAMS_API_S_VER_1 */ + u8 channel_flags; + u8 n_channels; + __le16 reserved2; + u8 data[]; +} __packed; /* SCAN_REQUEST_CMD_UMAC_API_S_VER_1 */ + +/** + * struct iwl_umac_scan_abort + * @hdr: umac command header + * @uid: scan id, &enum iwl_umac_scan_uid_offsets + * @flags: reserved + */ +struct iwl_umac_scan_abort { + struct iwl_mvm_umac_cmd_hdr hdr; + __le32 uid; + __le32 flags; +} __packed; /* SCAN_ABORT_CMD_UMAC_API_S_VER_1 */ + +/** + * struct iwl_umac_scan_complete + * @uid: scan id, &enum iwl_umac_scan_uid_offsets + * @last_schedule: last scheduling line + * @last_iter: last scan iteration number + * @scan status: &enum iwl_scan_offload_complete_status + * @ebs_status: &enum iwl_scan_ebs_status + * @time_from_last_iter: time elapsed from last iteration + * @reserved: for future use + */ +struct iwl_umac_scan_complete { + __le32 uid; + u8 last_schedule; + u8 last_iter; + u8 status; + u8 ebs_status; + __le32 time_from_last_iter; + __le32 reserved; +} __packed; /* SCAN_COMPLETE_NTF_UMAC_API_S_VER_1 */ + #endif diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/iwlwifi/mvm/fw-api.h index c62575d86bcd..1a67788e55f5 100644 --- a/drivers/net/wireless/iwlwifi/mvm/fw-api.h +++ b/drivers/net/wireless/iwlwifi/mvm/fw-api.h @@ -106,6 +106,12 @@ enum { DBG_CFG = 0x9, ANTENNA_COUPLING_NOTIFICATION = 0xa, + /* UMAC scan commands */ + SCAN_CFG_CMD = 0xc, + SCAN_REQ_UMAC = 0xd, + SCAN_ABORT_UMAC = 0xe, + SCAN_COMPLETE_UMAC = 0xf, + /* station table */ ADD_STA_KEY = 0x17, ADD_STA = 0x18, diff --git a/drivers/net/wireless/iwlwifi/mvm/fw.c b/drivers/net/wireless/iwlwifi/mvm/fw.c index f12b43d65f66..b4f244f510ed 100644 --- a/drivers/net/wireless/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/iwlwifi/mvm/fw.c @@ -505,6 +505,12 @@ int iwl_mvm_up(struct iwl_mvm *mvm) if (ret) goto error; + if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { + ret = iwl_mvm_config_scan(mvm); + if (ret) + goto error; + } + /* allow FW/transport low power modes if not during restart */ if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN); diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c index e3259b61b9e8..79ad6958255c 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -343,7 +343,8 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm) hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP; } - if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) + if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN || + mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS; hw->sta_data_size = sizeof(struct iwl_mvm_sta); @@ -1935,9 +1936,11 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, req->n_channels > mvm->fw->ucode_capa.n_scan_channels) return -EINVAL; - ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED); - if (ret) - return ret; + if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { + ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED); + if (ret) + return ret; + } mutex_lock(&mvm->mutex); @@ -1950,6 +1953,8 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req); + else if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) + ret = iwl_mvm_scan_umac(mvm, vif, hw_req); else ret = iwl_mvm_scan_request(mvm, vif, req); @@ -2247,9 +2252,11 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); int ret; - ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS); - if (ret) - return ret; + if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { + ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS); + if (ret) + return ret; + } mutex_lock(&mvm->mutex); @@ -2269,11 +2276,10 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, goto out; } - mvm->scan_status = IWL_MVM_SCAN_SCHED; - ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies); if (ret) mvm->scan_status = IWL_MVM_SCAN_NONE; + out: mutex_unlock(&mvm->mutex); return ret; @@ -2291,6 +2297,7 @@ static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw, iwl_mvm_wait_for_async_handlers(mvm); return ret; + } static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h index 09b49b407a5b..cbfba80a0e2f 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h @@ -588,6 +588,10 @@ struct iwl_mvm { void *scan_cmd; struct iwl_mcast_filter_cmd *mcast_filter_cmd; + /* UMAC scan tracking */ + u32 scan_uid[IWL_MVM_MAX_SIMULTANEOUS_SCANS]; + u8 scan_seq_num, sched_scan_seq_num; + /* rx chain antennas set through debugfs for the scan command */ u8 scan_rx_ant; @@ -943,6 +947,7 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *disabled_vif); /* Scanning */ +int iwl_mvm_scan_size(struct iwl_mvm *mvm); int iwl_mvm_scan_request(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_scan_request *req); @@ -983,6 +988,17 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, struct cfg80211_sched_scan_request *req, struct ieee80211_scan_ies *ies); +/* UMAC scan */ +int iwl_mvm_config_scan(struct iwl_mvm *mvm); +int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct ieee80211_scan_request *req); +int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_scan_ies *ies); +int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd); + /* MVM debugfs */ #ifdef CONFIG_IWLWIFI_DEBUGFS int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir); diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c index 53a5a29897b4..5ab10fb9d672 100644 --- a/drivers/net/wireless/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/iwlwifi/mvm/ops.c @@ -244,6 +244,8 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = { iwl_mvm_rx_scan_offload_complete_notif, true), RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results, false), + RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif, + true), RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false), RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false), @@ -346,6 +348,10 @@ static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = { CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION), CMD(ANTENNA_COUPLING_NOTIFICATION), CMD(SCD_QUEUE_CFG), + CMD(SCAN_CFG_CMD), + CMD(SCAN_REQ_UMAC), + CMD(SCAN_ABORT_UMAC), + CMD(SCAN_COMPLETE_UMAC), }; #undef CMD @@ -537,16 +543,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, } } - if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) - scan_size = sizeof(struct iwl_scan_req_unified_lmac) + - sizeof(struct iwl_scan_channel_cfg_lmac) * - mvm->fw->ucode_capa.n_scan_channels + - sizeof(struct iwl_scan_probe_req); - else - scan_size = sizeof(struct iwl_scan_cmd) + - mvm->fw->ucode_capa.max_probe_length + - mvm->fw->ucode_capa.n_scan_channels * - sizeof(struct iwl_scan_channel); + scan_size = iwl_mvm_scan_size(mvm); mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL); if (!mvm->scan_cmd) diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c index 8a1f4a8e80e7..c440b7b3ea4f 100644 --- a/drivers/net/wireless/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/iwlwifi/mvm/scan.c @@ -83,15 +83,29 @@ struct iwl_mvm_scan_params { } dwell[IEEE80211_NUM_BANDS]; }; +enum iwl_umac_scan_uid_type { + IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0), + IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1), + IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN | + IWL_UMAC_SCAN_UID_SCHED_SCAN, +}; + +static int iwl_umac_scan_stop(struct iwl_mvm *mvm, + enum iwl_umac_scan_uid_type type, bool notify); + +static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) +{ + if (mvm->scan_rx_ant != ANT_NONE) + return mvm->scan_rx_ant; + return mvm->fw->valid_rx_ant; +} + static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) { u16 rx_chain; u8 rx_ant; - if (mvm->scan_rx_ant != ANT_NONE) - rx_ant = mvm->scan_rx_ant; - else - rx_ant = mvm->fw->valid_rx_ant; + rx_ant = iwl_mvm_scan_rx_ant(mvm); 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; @@ -541,23 +555,17 @@ int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); - u8 client_bitmap = 0; - if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) { + if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) && + !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) { struct iwl_sched_scan_results *notif = (void *)pkt->data; - client_bitmap = notif->client_bitmap; + if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN)) + return 0; } - if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN || - client_bitmap & SCAN_CLIENT_SCHED_SCAN) { - if (mvm->scan_status == IWL_MVM_SCAN_SCHED) { - IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); - ieee80211_sched_scan_results(mvm->hw); - } else { - IWL_DEBUG_SCAN(mvm, "Scan results\n"); - } - } + IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); + ieee80211_sched_scan_results(mvm->hw); return 0; } @@ -969,6 +977,20 @@ free_blacklist: return ret; } +static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req) +{ + if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { + IWL_DEBUG_SCAN(mvm, + "Sending scheduled scan with filtering, n_match_sets %d\n", + req->n_match_sets); + return false; + } + + IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); + return true; +} + int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, struct cfg80211_sched_scan_request *req) { @@ -984,15 +1006,8 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, .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); - } else { - IWL_DEBUG_SCAN(mvm, - "Sending Scheduled scan without filtering\n"); + if (iwl_mvm_scan_pass_all(mvm, req)) scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL); - } if (mvm->last_ebs_successful && mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) @@ -1011,11 +1026,18 @@ int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm, int ret; if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) { + mvm->scan_status = IWL_MVM_SCAN_SCHED; ret = iwl_mvm_config_sched_scan_profiles(mvm, req); if (ret) return ret; ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies); + } else if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { + ret = iwl_mvm_config_sched_scan_profiles(mvm, req); + if (ret) + return ret; + ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies); } else { + mvm->scan_status = IWL_MVM_SCAN_SCHED; ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies); if (ret) return ret; @@ -1072,6 +1094,10 @@ int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify) lockdep_assert_held(&mvm->mutex); + if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) + return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN, + notify); + if (mvm->scan_status != IWL_MVM_SCAN_SCHED && (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) || mvm->scan_status != IWL_MVM_SCAN_OS)) { @@ -1198,11 +1224,8 @@ static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, static void iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_ies *ies, - struct iwl_scan_req_unified_lmac *cmd) + struct iwl_scan_probe_req *preq) { - struct iwl_scan_probe_req *preq = (void *)(cmd->data + - sizeof(struct iwl_scan_channel_cfg_lmac) * - mvm->fw->ucode_capa.n_scan_channels); struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf; u8 *pos, *newpos; @@ -1287,6 +1310,7 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd; + struct iwl_scan_probe_req *preq; struct iwl_mvm_scan_params params = {}; u32 flags; int ssid_bitmap = 0; @@ -1348,7 +1372,10 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, req->req.n_channels, ssid_bitmap, cmd); - iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, cmd); + preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * + mvm->fw->ucode_capa.n_scan_channels); + + iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { @@ -1381,6 +1408,7 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd; + struct iwl_scan_probe_req *preq; struct iwl_mvm_scan_params params = {}; int ret; u32 flags = 0, ssid_bitmap = 0; @@ -1404,15 +1432,8 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, cmd->n_channels = (u8)req->n_channels; - if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { - IWL_DEBUG_SCAN(mvm, - "Sending scheduled scan with filtering, n_match_sets %d\n", - req->n_match_sets); - } else { - IWL_DEBUG_SCAN(mvm, - "Sending Scheduled scan without filtering\n"); + if (iwl_mvm_scan_pass_all(mvm, req)) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; - } if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; @@ -1442,7 +1463,10 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels, ssid_bitmap, cmd); - iwl_mvm_build_unified_scan_probe(mvm, vif, ies, cmd); + preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * + mvm->fw->ucode_capa.n_scan_channels); + + iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { @@ -1464,6 +1488,10 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, int iwl_mvm_cancel_scan(struct iwl_mvm *mvm) { + if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) + return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN, + true); + if (mvm->scan_status == IWL_MVM_SCAN_NONE) return 0; @@ -1478,3 +1506,568 @@ int iwl_mvm_cancel_scan(struct iwl_mvm *mvm) return iwl_mvm_scan_offload_stop(mvm, true); return iwl_mvm_cancel_regular_scan(mvm); } + +/* UMAC scan API */ + +struct iwl_umac_scan_done { + struct iwl_mvm *mvm; + enum iwl_umac_scan_uid_type type; +}; + +static int rate_to_scan_rate_flag(unsigned int rate) +{ + static const int rate_to_scan_rate[IWL_RATE_COUNT] = { + [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, + [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, + [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, + [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, + [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, + [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, + [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, + [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, + [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, + [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, + [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, + [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, + }; + + return rate_to_scan_rate[rate]; +} + +static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) +{ + struct ieee80211_supported_band *band; + unsigned int rates = 0; + int i; + + band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; + for (i = 0; i < band->n_bitrates; i++) + rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); + band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; + for (i = 0; i < band->n_bitrates; i++) + rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); + + /* Set both basic rates and supported rates */ + rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); + + return cpu_to_le32(rates); +} + +int iwl_mvm_config_scan(struct iwl_mvm *mvm) +{ + + struct iwl_scan_config *scan_config; + struct ieee80211_supported_band *band; + int num_channels = + mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + + mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; + int ret, i, j = 0, cmd_size, data_size; + struct iwl_host_cmd cmd = { + .id = SCAN_CFG_CMD, + }; + + if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) + return -ENOBUFS; + + cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; + + scan_config = kzalloc(cmd_size, GFP_KERNEL); + if (!scan_config) + return -ENOMEM; + + data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr); + scan_config->hdr.size = cpu_to_le16(data_size); + scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE | + SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | + SCAN_CONFIG_FLAG_SET_TX_CHAINS | + SCAN_CONFIG_FLAG_SET_RX_CHAINS | + SCAN_CONFIG_FLAG_SET_ALL_TIMES | + SCAN_CONFIG_FLAG_SET_LEGACY_RATES | + SCAN_CONFIG_FLAG_SET_MAC_ADDR | + SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| + SCAN_CONFIG_N_CHANNELS(num_channels)); + scan_config->tx_chains = cpu_to_le32(mvm->fw->valid_tx_ant); + scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); + scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); + scan_config->out_of_channel_time = cpu_to_le32(170); + scan_config->suspend_time = cpu_to_le32(30); + scan_config->dwell_active = 20; + scan_config->dwell_passive = 110; + scan_config->dwell_fragmented = 20; + + memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); + + scan_config->bcast_sta_id = mvm->aux_sta.sta_id; + scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | + IWL_CHANNEL_FLAG_ACCURATE_EBS | + IWL_CHANNEL_FLAG_EBS_ADD | + IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; + + band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; + for (i = 0; i < band->n_channels; i++, j++) + scan_config->channel_array[j] = band->channels[i].center_freq; + band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; + for (i = 0; i < band->n_channels; i++, j++) + scan_config->channel_array[j] = band->channels[i].center_freq; + + cmd.data[0] = scan_config; + cmd.len[0] = cmd_size; + cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; + + IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + + kfree(scan_config); + return ret; +} + +static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid) +{ + int i; + + for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) + if (mvm->scan_uid[i] == uid) + return i; + + return i; +} + +static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm) +{ + return iwl_mvm_find_scan_uid(mvm, 0); +} + +static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm, + enum iwl_umac_scan_uid_type type) +{ + int i; + + for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) + if (mvm->scan_uid[i] & type) + return true; + + return false; +} + +static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm, + enum iwl_umac_scan_uid_type type) +{ + u32 uid; + + /* make sure exactly one bit is on in scan type */ + WARN_ON(hweight8(type) != 1); + + /* + * Make sure scan uids are unique. If one scan lasts long time while + * others are completing frequently, the seq number will wrap up and + * we may have more than one scan with the same uid. + */ + do { + uid = type | (mvm->scan_seq_num << + IWL_UMAC_SCAN_UID_SEQ_OFFSET); + mvm->scan_seq_num++; + } while (iwl_mvm_find_scan_uid(mvm, uid) < + IWL_MVM_MAX_SIMULTANEOUS_SCANS); + + IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid); + + return uid; +} + +static void +iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm, + struct iwl_scan_req_umac *cmd, + struct iwl_mvm_scan_params *params) +{ + memset(cmd, 0, ksize(cmd)); + cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) - + sizeof(struct iwl_mvm_umac_cmd_hdr)); + cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active; + cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive; + if (params->passive_fragmented) + cmd->fragmented_dwell = + params->dwell[IEEE80211_BAND_2GHZ].passive; + cmd->max_out_time = cpu_to_le32(params->max_out_time); + cmd->suspend_time = cpu_to_le32(params->suspend_time); + cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); +} + +static void +iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, + struct ieee80211_channel **channels, + int n_channels, u32 ssid_bitmap, + struct iwl_scan_req_umac *cmd) +{ + struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; + int i; + + for (i = 0; i < n_channels; i++) { + channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); + channel_cfg[i].channel_num = channels[i]->hw_value; + channel_cfg[i].iter_count = 1; + channel_cfg[i].iter_interval = 0; + } +} + +static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids, + struct cfg80211_ssid *ssids, + int fragmented) +{ + int flags = 0; + + if (n_ssids == 0) + flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; + + if (n_ssids == 1 && ssids[0].ssid_len != 0) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; + + if (fragmented) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; + + if (iwl_mvm_rrm_scan_needed(mvm)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; + + return flags; +} + +int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct ieee80211_scan_request *req) +{ + struct iwl_host_cmd hcmd = { + .id = SCAN_REQ_UMAC, + .len = { iwl_mvm_scan_size(mvm), }, + .data = { mvm->scan_cmd, }, + .dataflags = { IWL_HCMD_DFL_NOCOPY, }, + }; + struct iwl_scan_req_umac *cmd = mvm->scan_cmd; + struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + + sizeof(struct iwl_scan_channel_cfg_umac) * + mvm->fw->ucode_capa.n_scan_channels; + struct iwl_mvm_scan_params params = {}; + u32 uid, flags; + int ssid_bitmap = 0; + int ret, i, uid_idx; + + lockdep_assert_held(&mvm->mutex); + + uid_idx = iwl_mvm_find_free_scan_uid(mvm); + if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) + return -EBUSY; + + /* we should have failed registration if scan_cmd was NULL */ + if (WARN_ON(mvm->scan_cmd == NULL)) + return -ENOMEM; + + if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX || + req->ies.common_ie_len + + req->ies.len[NL80211_BAND_2GHZ] + + req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 > + SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels > + mvm->fw->ucode_capa.n_scan_channels)) + return -ENOBUFS; + + iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags, + ¶ms); + + iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms); + + uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN); + mvm->scan_uid[uid_idx] = uid; + cmd->uid = cpu_to_le32(uid); + + cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); + + flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids, + req->req.ssids, + params.passive_fragmented); + + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; + + cmd->general_flags = cpu_to_le32(flags); + cmd->n_channels = req->req.n_channels; + + for (i = 0; i < req->req.n_ssids; i++) + ssid_bitmap |= BIT(i); + + iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels, + req->req.n_channels, ssid_bitmap, cmd); + + sec_part->schedule[0].iter_count = 1; + sec_part->delay = 0; + + iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq); + + iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids, + req->req.n_ssids, 0); + + ret = iwl_mvm_send_cmd(mvm, &hcmd); + if (!ret) { + IWL_DEBUG_SCAN(mvm, + "Scan request was sent successfully\n"); + } else { + /* + * If the scan failed, it usually means that the FW was unable + * to allocate the time events. Warn on it, but maybe we + * should try to send the command again with different params. + */ + IWL_ERR(mvm, "Scan failed! ret %d\n", ret); + } + return ret; +} + +int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_scan_ies *ies) +{ + + struct iwl_host_cmd hcmd = { + .id = SCAN_REQ_UMAC, + .len = { iwl_mvm_scan_size(mvm), }, + .data = { mvm->scan_cmd, }, + .dataflags = { IWL_HCMD_DFL_NOCOPY, }, + }; + struct iwl_scan_req_umac *cmd = mvm->scan_cmd; + struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + + sizeof(struct iwl_scan_channel_cfg_umac) * + mvm->fw->ucode_capa.n_scan_channels; + struct iwl_mvm_scan_params params = {}; + u32 uid, flags; + int ssid_bitmap = 0; + int ret, uid_idx; + + lockdep_assert_held(&mvm->mutex); + + uid_idx = iwl_mvm_find_free_scan_uid(mvm); + if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) + return -EBUSY; + + /* we should have failed registration if scan_cmd was NULL */ + if (WARN_ON(mvm->scan_cmd == NULL)) + return -ENOMEM; + + if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX || + ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + + ies->len[NL80211_BAND_5GHZ] + 24 + 2 > + SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels > + mvm->fw->ucode_capa.n_scan_channels)) + return -ENOBUFS; + + iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, + ¶ms); + + iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms); + + cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); + + uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN); + mvm->scan_uid[uid_idx] = uid; + cmd->uid = cpu_to_le32(uid); + + cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW); + + flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids, + params.passive_fragmented); + + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; + + if (iwl_mvm_scan_pass_all(mvm, req)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; + else + flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; + + cmd->general_flags = cpu_to_le32(flags); + + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT && + mvm->last_ebs_successful) + cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | + IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | + IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; + + cmd->n_channels = req->n_channels; + + iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap, + false); + + /* This API uses bits 0-19 instead of 1-20. */ + ssid_bitmap = ssid_bitmap >> 1; + + iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels, + ssid_bitmap, cmd); + + sec_part->schedule[0].interval = + cpu_to_le16(req->interval / MSEC_PER_SEC); + sec_part->schedule[0].iter_count = 0xff; + + sec_part->delay = 0; + + iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq); + + ret = iwl_mvm_send_cmd(mvm, &hcmd); + if (!ret) { + IWL_DEBUG_SCAN(mvm, + "Sched scan request was sent successfully\n"); + } else { + /* + * If the scan failed, it usually means that the FW was unable + * to allocate the time events. Warn on it, but maybe we + * should try to send the command again with different params. + */ + IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); + } + return ret; +} + +int iwl_mvm_rx_umac_scan_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_umac_scan_complete *notif = (void *)pkt->data; + u32 uid = __le32_to_cpu(notif->uid); + bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN); + int uid_idx = iwl_mvm_find_scan_uid(mvm, uid); + + if (WARN(uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS, + "Scan notification for uknown scan ID\n")) + return 0; + + IWL_DEBUG_SCAN(mvm, + "Scan completed, uid %u type %s, status %s, EBS status %s\n", + uid, sched ? "sched" : "regular", + notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? + "completed" : "aborted", + notif->ebs_status == IWL_SCAN_EBS_SUCCESS ? + "success" : "failed"); + + mvm->last_ebs_successful = !notif->ebs_status; + mvm->scan_uid[uid_idx] = 0; + + if (!sched) { + ieee80211_scan_completed(mvm->hw, + notif->status == + IWL_SCAN_OFFLOAD_ABORTED); + iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) { + ieee80211_sched_scan_stopped(mvm->hw); + } else { + IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n"); + } + + return 0; +} + +static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait, + struct iwl_rx_packet *pkt, void *data) +{ + struct iwl_umac_scan_done *scan_done = data; + struct iwl_umac_scan_complete *notif = (void *)pkt->data; + u32 uid = __le32_to_cpu(notif->uid); + int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid); + + if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC)) + return false; + + if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) + return false; + + /* + * Clear scan uid of scans that was aborted from above and completed + * in FW so the RX handler does nothing. + */ + scan_done->mvm->scan_uid[uid_idx] = 0; + + return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type); +} + +static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid) +{ + struct iwl_umac_scan_abort cmd = { + .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) - + sizeof(struct iwl_mvm_umac_cmd_hdr)), + .uid = cpu_to_le32(uid), + }; + + lockdep_assert_held(&mvm->mutex); + + IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); + + return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd); +} + +static int iwl_umac_scan_stop(struct iwl_mvm *mvm, + enum iwl_umac_scan_uid_type type, bool notify) +{ + struct iwl_notification_wait wait_scan_done; + static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, }; + struct iwl_umac_scan_done scan_done = { + .mvm = mvm, + .type = type, + }; + int i, ret = -EIO; + + iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, + scan_done_notif, + ARRAY_SIZE(scan_done_notif), + iwl_scan_umac_done_check, &scan_done); + + IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); + + for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) { + if (mvm->scan_uid[i] & type) { + int err; + + if (iwl_mvm_is_radio_killed(mvm) && + (type & IWL_UMAC_SCAN_UID_REG_SCAN)) { + ieee80211_scan_completed(mvm->hw, true); + iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + break; + } + + err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]); + if (!err) + ret = 0; + } + } + + if (ret) { + IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n"); + iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); + return ret; + } + + ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); + if (ret) + return ret; + + if (notify) { + if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN) + ieee80211_sched_scan_stopped(mvm->hw); + if (type & IWL_UMAC_SCAN_UID_REG_SCAN) { + ieee80211_scan_completed(mvm->hw, true); + iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); + } + } + + return ret; +} + +int iwl_mvm_scan_size(struct iwl_mvm *mvm) +{ + if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) + return sizeof(struct iwl_scan_req_umac) + + sizeof(struct iwl_scan_channel_cfg_umac) * + mvm->fw->ucode_capa.n_scan_channels + + sizeof(struct iwl_scan_req_umac_tail); + + if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) + return sizeof(struct iwl_scan_req_unified_lmac) + + sizeof(struct iwl_scan_channel_cfg_lmac) * + mvm->fw->ucode_capa.n_scan_channels + + sizeof(struct iwl_scan_probe_req); + + return sizeof(struct iwl_scan_cmd) + + mvm->fw->ucode_capa.max_probe_length + + mvm->fw->ucode_capa.n_scan_channels * + sizeof(struct iwl_scan_channel); +}