diff options
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/Makefile | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-1000.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-2000.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-5000.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-6000.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-lib.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-rxon.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-sta.c | 833 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-tx.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.h | 117 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-scan.c | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-sta.c | 839 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-sta.h | 143 |
17 files changed, 940 insertions, 1007 deletions
diff --git a/drivers/net/wireless/iwlwifi/Makefile b/drivers/net/wireless/iwlwifi/Makefile index bacafa4a5f48..3dfb9df40895 100644 --- a/drivers/net/wireless/iwlwifi/Makefile +++ b/drivers/net/wireless/iwlwifi/Makefile @@ -6,8 +6,7 @@ iwlwifi-objs += iwl-agn-lib.o iwl-agn-calib.o iwl-io.o iwlwifi-objs += iwl-agn-tt.o iwl-agn-sta.o iwlwifi-objs += iwl-core.o iwl-eeprom.o iwl-power.o -iwlwifi-objs += iwl-rx.o iwl-sta.o -iwlwifi-objs += iwl-scan.o iwl-led.o +iwlwifi-objs += iwl-rx.o iwl-scan.o iwl-led.o iwlwifi-objs += iwl-agn-rxon.o iwlwifi-objs += iwl-5000.o iwlwifi-objs += iwl-6000.o diff --git a/drivers/net/wireless/iwlwifi/iwl-1000.c b/drivers/net/wireless/iwlwifi/iwl-1000.c index dfd81debc32e..0bf6afd8e657 100644 --- a/drivers/net/wireless/iwlwifi/iwl-1000.c +++ b/drivers/net/wireless/iwlwifi/iwl-1000.c @@ -39,7 +39,6 @@ #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" -#include "iwl-sta.h" #include "iwl-agn.h" #include "iwl-helpers.h" #include "iwl-agn-hw.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-2000.c b/drivers/net/wireless/iwlwifi/iwl-2000.c index c7634b2d2635..e969c5f2f4b7 100644 --- a/drivers/net/wireless/iwlwifi/iwl-2000.c +++ b/drivers/net/wireless/iwlwifi/iwl-2000.c @@ -39,7 +39,6 @@ #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" -#include "iwl-sta.h" #include "iwl-agn.h" #include "iwl-helpers.h" #include "iwl-agn-hw.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c index e88aca5282e0..b85e80a71363 100644 --- a/drivers/net/wireless/iwlwifi/iwl-5000.c +++ b/drivers/net/wireless/iwlwifi/iwl-5000.c @@ -40,7 +40,6 @@ #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" -#include "iwl-sta.h" #include "iwl-helpers.h" #include "iwl-agn.h" #include "iwl-agn-hw.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c index 4abfcf2f257c..aece578226c6 100644 --- a/drivers/net/wireless/iwlwifi/iwl-6000.c +++ b/drivers/net/wireless/iwlwifi/iwl-6000.c @@ -39,7 +39,6 @@ #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" -#include "iwl-sta.h" #include "iwl-agn.h" #include "iwl-helpers.h" #include "iwl-agn-hw.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c index d30714be515b..b1746f9b6648 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c @@ -38,7 +38,6 @@ #include "iwl-helpers.h" #include "iwl-agn-hw.h" #include "iwl-agn.h" -#include "iwl-sta.h" #include "iwl-trans.h" #include "iwl-shared.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c index 353af8f995b0..66118cea2af3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c @@ -36,7 +36,6 @@ #include <linux/workqueue.h> #include "iwl-dev.h" -#include "iwl-sta.h" #include "iwl-core.h" #include "iwl-agn.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c index 81555223262f..68bdc195e4f3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c @@ -26,7 +26,6 @@ #include "iwl-dev.h" #include "iwl-agn.h" -#include "iwl-sta.h" #include "iwl-core.h" #include "iwl-agn-calib.h" #include "iwl-helpers.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c index c1807fa1d171..ed6283623932 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c @@ -31,10 +31,823 @@ #include "iwl-dev.h" #include "iwl-core.h" -#include "iwl-sta.h" #include "iwl-agn.h" #include "iwl-trans.h" +/* priv->shrd->sta_lock must be held */ +static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) +{ + + if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) + IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u " + "addr %pM\n", + sta_id, priv->stations[sta_id].sta.sta.addr); + + if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { + IWL_DEBUG_ASSOC(priv, + "STA id %u addr %pM already present in uCode " + "(according to driver)\n", + sta_id, priv->stations[sta_id].sta.sta.addr); + } else { + priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; + IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", + sta_id, priv->stations[sta_id].sta.sta.addr); + } +} + +static int iwl_process_add_sta_resp(struct iwl_priv *priv, + struct iwl_addsta_cmd *addsta, + struct iwl_rx_packet *pkt) +{ + u8 sta_id = addsta->sta.sta_id; + unsigned long flags; + int ret = -EIO; + + if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", + pkt->hdr.flags); + return ret; + } + + IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", + sta_id); + + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + + switch (pkt->u.add_sta.status) { + case ADD_STA_SUCCESS_MSK: + IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); + iwl_sta_ucode_activate(priv, sta_id); + ret = 0; + break; + case ADD_STA_NO_ROOM_IN_TABLE: + IWL_ERR(priv, "Adding station %d failed, no room in table.\n", + sta_id); + break; + case ADD_STA_NO_BLOCK_ACK_RESOURCE: + IWL_ERR(priv, "Adding station %d failed, no block ack " + "resource.\n", sta_id); + break; + case ADD_STA_MODIFY_NON_EXIST_STA: + IWL_ERR(priv, "Attempting to modify non-existing station %d\n", + sta_id); + break; + default: + IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", + pkt->u.add_sta.status); + break; + } + + IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n", + priv->stations[sta_id].sta.mode == + STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", + sta_id, priv->stations[sta_id].sta.sta.addr); + + /* + * XXX: The MAC address in the command buffer is often changed from + * the original sent to the device. That is, the MAC address + * written to the command buffer often is not the same MAC address + * read from the command buffer when the command returns. This + * issue has not yet been resolved and this debugging is left to + * observe the problem. + */ + IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n", + priv->stations[sta_id].sta.mode == + STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", + addsta->sta.addr); + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + + return ret; +} + +int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, + struct iwl_device_cmd *cmd) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_addsta_cmd *addsta = + (struct iwl_addsta_cmd *) cmd->payload; + + return iwl_process_add_sta_resp(priv, addsta, pkt); +} + +static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data) +{ + u16 size = (u16)sizeof(struct iwl_addsta_cmd); + struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data; + memcpy(addsta, cmd, size); + /* resrved in 5000 */ + addsta->rate_n_flags = cpu_to_le16(0); + return size; +} + +int iwl_send_add_sta(struct iwl_priv *priv, + struct iwl_addsta_cmd *sta, u8 flags) +{ + int ret = 0; + u8 data[sizeof(*sta)]; + struct iwl_host_cmd cmd = { + .id = REPLY_ADD_STA, + .flags = flags, + .data = { data, }, + }; + u8 sta_id __maybe_unused = sta->sta.sta_id; + + IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", + sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); + + if (!(flags & CMD_ASYNC)) { + cmd.flags |= CMD_WANT_SKB; + might_sleep(); + } + + cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data); + ret = iwl_trans_send_cmd(trans(priv), &cmd); + + if (ret || (flags & CMD_ASYNC)) + return ret; + /*else the command was successfully sent in SYNC mode, need to free + * the reply page */ + + iwl_free_pages(priv->shrd, cmd.reply_page); + + if (cmd.handler_status) + IWL_ERR(priv, "%s - error in the CMD response %d", __func__, + cmd.handler_status); + + return cmd.handler_status; +} + +static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, + struct ieee80211_sta *sta, + struct iwl_rxon_context *ctx) +{ + struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; + __le32 sta_flags; + u8 mimo_ps_mode; + + if (!sta || !sta_ht_inf->ht_supported) + goto done; + + mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; + IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", + (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? + "static" : + (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? + "dynamic" : "disabled"); + + sta_flags = priv->stations[index].sta.station_flags; + + sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); + + switch (mimo_ps_mode) { + case WLAN_HT_CAP_SM_PS_STATIC: + sta_flags |= STA_FLG_MIMO_DIS_MSK; + break; + case WLAN_HT_CAP_SM_PS_DYNAMIC: + sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; + break; + case WLAN_HT_CAP_SM_PS_DISABLED: + break; + default: + IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); + break; + } + + sta_flags |= cpu_to_le32( + (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); + + sta_flags |= cpu_to_le32( + (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); + + if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) + sta_flags |= STA_FLG_HT40_EN_MSK; + else + sta_flags &= ~STA_FLG_HT40_EN_MSK; + + priv->stations[index].sta.station_flags = sta_flags; + done: + return; +} + +/** + * iwl_prep_station - Prepare station information for addition + * + * should be called with sta_lock held + */ +u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + const u8 *addr, bool is_ap, struct ieee80211_sta *sta) +{ + struct iwl_station_entry *station; + int i; + u8 sta_id = IWL_INVALID_STATION; + + if (is_ap) + sta_id = ctx->ap_sta_id; + else if (is_broadcast_ether_addr(addr)) + sta_id = ctx->bcast_sta_id; + else + for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { + if (!compare_ether_addr(priv->stations[i].sta.sta.addr, + addr)) { + sta_id = i; + break; + } + + if (!priv->stations[i].used && + sta_id == IWL_INVALID_STATION) + sta_id = i; + } + + /* + * These two conditions have the same outcome, but keep them + * separate + */ + if (unlikely(sta_id == IWL_INVALID_STATION)) + return sta_id; + + /* + * uCode is not able to deal with multiple requests to add a + * station. Keep track if one is in progress so that we do not send + * another. + */ + if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { + IWL_DEBUG_INFO(priv, "STA %d already in process of being " + "added.\n", sta_id); + return sta_id; + } + + if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && + (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && + !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { + IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " + "adding again.\n", sta_id, addr); + return sta_id; + } + + station = &priv->stations[sta_id]; + station->used = IWL_STA_DRIVER_ACTIVE; + IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", + sta_id, addr); + priv->num_stations++; + + /* Set up the REPLY_ADD_STA command to send to device */ + memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); + memcpy(station->sta.sta.addr, addr, ETH_ALEN); + station->sta.mode = 0; + station->sta.sta.sta_id = sta_id; + station->sta.station_flags = ctx->station_flags; + station->ctxid = ctx->ctxid; + + if (sta) { + struct iwl_station_priv *sta_priv; + + sta_priv = (void *)sta->drv_priv; + sta_priv->ctx = ctx; + } + + /* + * OK to call unconditionally, since local stations (IBSS BSSID + * STA and broadcast STA) pass in a NULL sta, and mac80211 + * doesn't allow HT IBSS. + */ + iwl_set_ht_add_station(priv, sta_id, sta, ctx); + + return sta_id; + +} + +#define STA_WAIT_TIMEOUT (HZ/2) + +/** + * iwl_add_station_common - + */ +int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + const u8 *addr, bool is_ap, + struct ieee80211_sta *sta, u8 *sta_id_r) +{ + unsigned long flags_spin; + int ret = 0; + u8 sta_id; + struct iwl_addsta_cmd sta_cmd; + + *sta_id_r = 0; + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); + if (sta_id == IWL_INVALID_STATION) { + IWL_ERR(priv, "Unable to prepare station %pM for addition\n", + addr); + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + return -EINVAL; + } + + /* + * uCode is not able to deal with multiple requests to add a + * station. Keep track if one is in progress so that we do not send + * another. + */ + if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { + IWL_DEBUG_INFO(priv, "STA %d already in process of being " + "added.\n", sta_id); + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + return -EEXIST; + } + + if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && + (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { + IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " + "adding again.\n", sta_id, addr); + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + return -EEXIST; + } + + priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; + memcpy(&sta_cmd, &priv->stations[sta_id].sta, + sizeof(struct iwl_addsta_cmd)); + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + + /* Add station to device's station table */ + ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); + if (ret) { + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + IWL_ERR(priv, "Adding station %pM failed.\n", + priv->stations[sta_id].sta.sta.addr); + priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; + priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + } + *sta_id_r = sta_id; + return ret; +} + +/** + * iwl_sta_ucode_deactivate - deactivate ucode status for a station + * + * priv->shrd->sta_lock must be held + */ +static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) +{ + /* Ucode must be active and driver must be non active */ + if ((priv->stations[sta_id].used & + (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != + IWL_STA_UCODE_ACTIVE) + IWL_ERR(priv, "removed non active STA %u\n", sta_id); + + priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; + + memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); + IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); +} + +static int iwl_send_remove_station(struct iwl_priv *priv, + const u8 *addr, int sta_id, + bool temporary) +{ + struct iwl_rx_packet *pkt; + int ret; + + unsigned long flags_spin; + struct iwl_rem_sta_cmd rm_sta_cmd; + + struct iwl_host_cmd cmd = { + .id = REPLY_REMOVE_STA, + .len = { sizeof(struct iwl_rem_sta_cmd), }, + .flags = CMD_SYNC, + .data = { &rm_sta_cmd, }, + }; + + memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); + rm_sta_cmd.num_sta = 1; + memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); + + cmd.flags |= CMD_WANT_SKB; + + ret = iwl_trans_send_cmd(trans(priv), &cmd); + + if (ret) + return ret; + + pkt = (struct iwl_rx_packet *)cmd.reply_page; + if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { + IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", + pkt->hdr.flags); + ret = -EIO; + } + + if (!ret) { + switch (pkt->u.rem_sta.status) { + case REM_STA_SUCCESS_MSK: + if (!temporary) { + spin_lock_irqsave(&priv->shrd->sta_lock, + flags_spin); + iwl_sta_ucode_deactivate(priv, sta_id); + spin_unlock_irqrestore(&priv->shrd->sta_lock, + flags_spin); + } + IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); + break; + default: + ret = -EIO; + IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); + break; + } + } + iwl_free_pages(priv->shrd, cmd.reply_page); + + return ret; +} + +/** + * iwl_remove_station - Remove driver's knowledge of station. + */ +int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, + const u8 *addr) +{ + unsigned long flags; + + if (!iwl_is_ready(priv->shrd)) { + IWL_DEBUG_INFO(priv, + "Unable to remove station %pM, device not ready.\n", + addr); + /* + * It is typical for stations to be removed when we are + * going down. Return success since device will be down + * soon anyway + */ + return 0; + } + + IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", + sta_id, addr); + + if (WARN_ON(sta_id == IWL_INVALID_STATION)) + return -EINVAL; + + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + + if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { + IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", + addr); + goto out_err; + } + + if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { + IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", + addr); + goto out_err; + } + + if (priv->stations[sta_id].used & IWL_STA_LOCAL) { + kfree(priv->stations[sta_id].lq); + priv->stations[sta_id].lq = NULL; + } + + priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; + + priv->num_stations--; + + if (WARN_ON(priv->num_stations < 0)) + priv->num_stations = 0; + + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + + return iwl_send_remove_station(priv, addr, sta_id, false); +out_err: + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + return -EINVAL; +} + +/** + * iwl_clear_ucode_stations - clear ucode station table bits + * + * This function clears all the bits in the driver indicating + * which stations are active in the ucode. Call when something + * other than explicit station management would cause this in + * the ucode, e.g. unassociated RXON. + */ +void iwl_clear_ucode_stations(struct iwl_priv *priv, + struct iwl_rxon_context *ctx) +{ + int i; + unsigned long flags_spin; + bool cleared = false; + + IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); + + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + for (i = 0; i < IWLAGN_STATION_COUNT; i++) { + if (ctx && ctx->ctxid != priv->stations[i].ctxid) + continue; + + if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { + IWL_DEBUG_INFO(priv, + "Clearing ucode active for station %d\n", i); + priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; + cleared = true; + } + } + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + + if (!cleared) + IWL_DEBUG_INFO(priv, + "No active stations found to be cleared\n"); +} + +/** + * iwl_restore_stations() - Restore driver known stations to device + * + * All stations considered active by driver, but not present in ucode, is + * restored. + * + * Function sleeps. + */ +void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) +{ + struct iwl_addsta_cmd sta_cmd; + struct iwl_link_quality_cmd lq; + unsigned long flags_spin; + int i; + bool found = false; + int ret; + bool send_lq; + + if (!iwl_is_ready(priv->shrd)) { + IWL_DEBUG_INFO(priv, + "Not ready yet, not restoring any stations.\n"); + return; + } + + IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + for (i = 0; i < IWLAGN_STATION_COUNT; i++) { + if (ctx->ctxid != priv->stations[i].ctxid) + continue; + if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && + !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { + IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", + priv->stations[i].sta.sta.addr); + priv->stations[i].sta.mode = 0; + priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; + found = true; + } + } + + for (i = 0; i < IWLAGN_STATION_COUNT; i++) { + if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { + memcpy(&sta_cmd, &priv->stations[i].sta, + sizeof(struct iwl_addsta_cmd)); + send_lq = false; + if (priv->stations[i].lq) { + if (priv->shrd->wowlan) + iwl_sta_fill_lq(priv, ctx, i, &lq); + else + memcpy(&lq, priv->stations[i].lq, + sizeof(struct iwl_link_quality_cmd)); + send_lq = true; + } + spin_unlock_irqrestore(&priv->shrd->sta_lock, + flags_spin); + ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); + if (ret) { + spin_lock_irqsave(&priv->shrd->sta_lock, + flags_spin); + IWL_ERR(priv, "Adding station %pM failed.\n", + priv->stations[i].sta.sta.addr); + priv->stations[i].used &= + ~IWL_STA_DRIVER_ACTIVE; + priv->stations[i].used &= + ~IWL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&priv->shrd->sta_lock, + flags_spin); + } + /* + * Rate scaling has already been initialized, send + * current LQ command + */ + if (send_lq) + iwl_send_lq_cmd(priv, ctx, &lq, + CMD_SYNC, true); + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; + } + } + + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + if (!found) + IWL_DEBUG_INFO(priv, "Restoring all known stations .... " + "no stations to be restored.\n"); + else + IWL_DEBUG_INFO(priv, "Restoring all known stations .... " + "complete.\n"); +} + +void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) +{ + unsigned long flags; + int sta_id = ctx->ap_sta_id; + int ret; + struct iwl_addsta_cmd sta_cmd; + struct iwl_link_quality_cmd lq; + bool active; + + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + return; + } + + memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); + sta_cmd.mode = 0; + memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); + + active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; + priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + + if (active) { + ret = iwl_send_remove_station( + priv, priv->stations[sta_id].sta.sta.addr, + sta_id, true); + if (ret) + IWL_ERR(priv, "failed to remove STA %pM (%d)\n", + priv->stations[sta_id].sta.sta.addr, ret); + } + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); + + ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); + if (ret) + IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", + priv->stations[sta_id].sta.sta.addr, ret); + iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); +} + +int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) +{ + int i; + + for (i = 0; i < priv->sta_key_max_num; i++) + if (!test_and_set_bit(i, &priv->ucode_key_table)) + return i; + + return WEP_INVALID_OFFSET; +} + +void iwl_dealloc_bcast_stations(struct iwl_priv *priv) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + for (i = 0; i < IWLAGN_STATION_COUNT; i++) { + if (!(priv->stations[i].used & IWL_STA_BCAST)) + continue; + + priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; + priv->num_stations--; + if (WARN_ON(priv->num_stations < 0)) + priv->num_stations = 0; + kfree(priv->stations[i].lq); + priv->stations[i].lq = NULL; + } + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); +} + +#ifdef CONFIG_IWLWIFI_DEBUG +static void iwl_dump_lq_cmd(struct iwl_priv *priv, + struct iwl_link_quality_cmd *lq) +{ + int i; + IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); + IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", + lq->general_params.single_stream_ant_msk, + lq->general_params.dual_stream_ant_msk); + + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) + IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", + i, lq->rs_table[i].rate_n_flags); +} +#else +static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, + struct iwl_link_quality_cmd *lq) +{ +} +#endif + +/** + * is_lq_table_valid() - Test one aspect of LQ cmd for validity + * + * It sometimes happens when a HT rate has been in use and we + * loose connectivity with AP then mac80211 will first tell us that the + * current channel is not HT anymore before removing the station. In such a + * scenario the RXON flags will be updated to indicate we are not + * communicating HT anymore, but the LQ command may still contain HT rates. + * Test for this to prevent driver from sending LQ command between the time + * RXON flags are updated and when LQ command is updated. + */ +static bool is_lq_table_valid(struct iwl_priv *priv, + struct iwl_rxon_context *ctx, + struct iwl_link_quality_cmd *lq) +{ + int i; + + if (ctx->ht.enabled) + return true; + + IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", + ctx->active.channel); + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { + if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & + RATE_MCS_HT_MSK) { + IWL_DEBUG_INFO(priv, + "index %d of LQ expects HT channel\n", + i); + return false; + } + } + return true; +} + +/** + * iwl_send_lq_cmd() - Send link quality command + * @init: This command is sent as part of station initialization right + * after station has been added. + * + * The link quality command is sent as the last step of station creation. + * This is the special case in which init is set and we call a callback in + * this case to clear the state indicating that station creation is in + * progress. + */ +int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + struct iwl_link_quality_cmd *lq, u8 flags, bool init) +{ + int ret = 0; + unsigned long flags_spin; + + struct iwl_host_cmd cmd = { + .id = REPLY_TX_LINK_QUALITY_CMD, + .len = { sizeof(struct iwl_link_quality_cmd), }, + .flags = flags, + .data = { lq, }, + }; + + if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) + return -EINVAL; + + + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + return -EINVAL; + } + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + + iwl_dump_lq_cmd(priv, lq); + if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) + return -EINVAL; + + if (is_lq_table_valid(priv, ctx, lq)) + ret = iwl_trans_send_cmd(trans(priv), &cmd); + else + ret = -EINVAL; + + if (cmd.flags & CMD_ASYNC) + return ret; + + if (init) { + IWL_DEBUG_INFO(priv, "init LQ command complete, " + "clearing sta addition status for sta %d\n", + lq->sta_id); + spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); + priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); + } + return ret; +} + +int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct iwl_priv *priv = hw->priv; + struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; + int ret; + + IWL_DEBUG_MAC80211(priv, "enter: received request to remove " + "station %pM\n", sta->addr); + mutex_lock(&priv->shrd->mutex); + IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", + sta->addr); + ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); + if (ret) + IWL_ERR(priv, "Error removing station %pM\n", + sta->addr); + mutex_unlock(&priv->shrd->mutex); + IWL_DEBUG_MAC80211(priv, "leave\n"); + + return ret; +} + void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id, struct iwl_link_quality_cmd *link_cmd) { @@ -77,7 +890,8 @@ void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, hw_params(priv).valid_tx_ant; } - link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; + link_cmd->agg_params.agg_dis_start_th = + LINK_QUAL_AGG_DISABLE_START_DEF; link_cmd->agg_params.agg_time_limit = cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); @@ -85,7 +899,8 @@ void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, } static struct iwl_link_quality_cmd * -iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id) +iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + u8 sta_id) { struct iwl_link_quality_cmd *link_cmd; @@ -105,7 +920,8 @@ iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id) * * Function sleeps. */ -int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, +int iwlagn_add_bssid_station(struct iwl_priv *priv, + struct iwl_rxon_context *ctx, const u8 *addr, u8 *sta_id_r) { int ret; @@ -132,7 +948,8 @@ int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx /* Set up default rate scaling table in device's station table */ link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); if (!link_cmd) { - IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n", + IWL_ERR(priv, + "Unable to initialize rate scaling for station %pM.\n", addr); return -ENOMEM; } @@ -224,7 +1041,8 @@ int iwl_remove_default_wep_key(struct iwl_priv *priv, memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0])); if (iwl_is_rfkill(priv->shrd)) { - IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n"); + IWL_DEBUG_WEP(priv, + "Not sending REPLY_WEPKEY command due to RFKILL.\n"); /* but keys in device are clear anyway so return success */ return 0; } @@ -245,7 +1063,8 @@ int iwl_set_default_wep_key(struct iwl_priv *priv, if (keyconf->keylen != WEP_KEY_LEN_128 && keyconf->keylen != WEP_KEY_LEN_64) { - IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen); + IWL_DEBUG_WEP(priv, + "Bad WEP key length %d\n", keyconf->keylen); return -EINVAL; } diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c index f849097cf7e6..d7e48f262701 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c @@ -35,7 +35,6 @@ #include "iwl-dev.h" #include "iwl-core.h" -#include "iwl-sta.h" #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-agn-hw.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index 6c57199b041f..5a78480e4529 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -48,7 +48,6 @@ #include "iwl-core.h" #include "iwl-io.h" #include "iwl-helpers.h" -#include "iwl-sta.h" #include "iwl-agn-calib.h" #include "iwl-agn.h" #include "iwl-shared.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.h b/drivers/net/wireless/iwlwifi/iwl-agn.h index a8df7eb596c4..5b936ec1a541 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.h +++ b/drivers/net/wireless/iwlwifi/iwl-agn.h @@ -152,10 +152,6 @@ u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant_idx, u8 valid); void iwlagn_post_scan(struct iwl_priv *priv); void iwlagn_disable_roc(struct iwl_priv *priv); -/* station mgmt */ -int iwlagn_manage_ibss_station(struct iwl_priv *priv, - struct ieee80211_vif *vif, bool add); - /* bt coex */ void iwlagn_send_advance_bt_config(struct iwl_priv *priv); int iwlagn_bt_coex_profile_notif(struct iwl_priv *priv, @@ -175,7 +171,120 @@ static inline const char *iwl_get_tx_fail_reason(u32 status) { return ""; } static inline const char *iwl_get_agg_tx_fail_reason(u16 status) { return ""; } #endif + /* station management */ +int iwlagn_manage_ibss_station(struct iwl_priv *priv, + struct ieee80211_vif *vif, bool add); +#define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */ +#define IWL_STA_UCODE_ACTIVE BIT(1) /* ucode entry is active */ +#define IWL_STA_UCODE_INPROGRESS BIT(2) /* ucode entry is in process of + being activated */ +#define IWL_STA_LOCAL BIT(3) /* station state not directed by mac80211; + (this is for the IBSS BSSID stations) */ +#define IWL_STA_BCAST BIT(4) /* this station is the special bcast station */ + + +void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx); +void iwl_clear_ucode_stations(struct iwl_priv *priv, + struct iwl_rxon_context *ctx); +void iwl_dealloc_bcast_stations(struct iwl_priv *priv); +int iwl_get_free_ucode_key_offset(struct iwl_priv *priv); +int iwl_send_add_sta(struct iwl_priv *priv, + struct iwl_addsta_cmd *sta, u8 flags); +int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + const u8 *addr, bool is_ap, + struct ieee80211_sta *sta, u8 *sta_id_r); +int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, + const u8 *addr); +int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta); + +u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + const u8 *addr, bool is_ap, struct ieee80211_sta *sta); + +void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + u8 sta_id, struct iwl_link_quality_cmd *link_cmd); +int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, + struct iwl_link_quality_cmd *lq, u8 flags, bool init); +void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx); +int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, + struct iwl_device_cmd *cmd); + + +/** + * iwl_clear_driver_stations - clear knowledge of all stations from driver + * @priv: iwl priv struct + * + * This is called during iwl_down() to make sure that in the case + * we're coming there from a hardware restart mac80211 will be + * able to reconfigure stations -- if we're getting there in the + * normal down flow then the stations will already be cleared. + */ +static inline void iwl_clear_driver_stations(struct iwl_priv *priv) +{ + unsigned long flags; + struct iwl_rxon_context *ctx; + + spin_lock_irqsave(&priv->shrd->sta_lock, flags); + memset(priv->stations, 0, sizeof(priv->stations)); + priv->num_stations = 0; + + priv->ucode_key_table = 0; + + for_each_context(priv, ctx) { + /* + * Remove all key information that is not stored as part + * of station information since mac80211 may not have had + * a chance to remove all the keys. When device is + * reconfigured by mac80211 after an error all keys will + * be reconfigured. + */ + memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys)); + ctx->key_mapping_keys = 0; + } + + spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); +} + +static inline int iwl_sta_id(struct ieee80211_sta *sta) +{ + if (WARN_ON(!sta)) + return IWL_INVALID_STATION; + + return ((struct iwl_station_priv *)sta->drv_priv)->sta_id; +} + +/** + * iwl_sta_id_or_broadcast - return sta_id or broadcast sta + * @priv: iwl priv + * @context: the current context + * @sta: mac80211 station + * + * In certain circumstances mac80211 passes a station pointer + * that may be %NULL, for example during TX or key setup. In + * that case, we need to use the broadcast station, so this + * inline wraps that pattern. + */ +static inline int iwl_sta_id_or_broadcast(struct iwl_priv *priv, + struct iwl_rxon_context *context, + struct ieee80211_sta *sta) +{ + int sta_id; + + if (!sta) + return context->bcast_sta_id; + + sta_id = iwl_sta_id(sta); + + /* + * mac80211 should not be passing a partially + * initialised station! + */ + WARN_ON(sta_id == IWL_INVALID_STATION); + + return sta_id; +} + int iwlagn_alloc_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx); int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index f80075601439..ad66150a46cd 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -39,7 +39,6 @@ #include "iwl-core.h" #include "iwl-io.h" #include "iwl-power.h" -#include "iwl-sta.h" #include "iwl-agn.h" #include "iwl-helpers.h" #include "iwl-shared.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index 2581c3cbfb50..d406c7288ccc 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c @@ -35,7 +35,6 @@ #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" -#include "iwl-sta.h" #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-agn-calib.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c index 55f1f86796a6..bb03bf8398e0 100644 --- a/drivers/net/wireless/iwlwifi/iwl-scan.c +++ b/drivers/net/wireless/iwlwifi/iwl-scan.c @@ -33,7 +33,6 @@ #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" -#include "iwl-sta.h" #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-agn.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c deleted file mode 100644 index 586007ee3a80..000000000000 --- a/drivers/net/wireless/iwlwifi/iwl-sta.c +++ /dev/null @@ -1,839 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. - * - * Portions of this file are derived from the ipw3945 project, as well - * as portions of the ieee80211 subsystem header files. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include <net/mac80211.h> -#include <linux/etherdevice.h> -#include <linux/sched.h> -#include <linux/lockdep.h> - -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-trans.h" -#include "iwl-agn.h" - -/* priv->shrd->sta_lock must be held */ -static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) -{ - - if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) - IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n", - sta_id, priv->stations[sta_id].sta.sta.addr); - - if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { - IWL_DEBUG_ASSOC(priv, - "STA id %u addr %pM already present in uCode (according to driver)\n", - sta_id, priv->stations[sta_id].sta.sta.addr); - } else { - priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; - IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", - sta_id, priv->stations[sta_id].sta.sta.addr); - } -} - -static int iwl_process_add_sta_resp(struct iwl_priv *priv, - struct iwl_addsta_cmd *addsta, - struct iwl_rx_packet *pkt) -{ - u8 sta_id = addsta->sta.sta_id; - unsigned long flags; - int ret = -EIO; - - if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { - IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", - pkt->hdr.flags); - return ret; - } - - IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", - sta_id); - - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - - switch (pkt->u.add_sta.status) { - case ADD_STA_SUCCESS_MSK: - IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); - iwl_sta_ucode_activate(priv, sta_id); - ret = 0; - break; - case ADD_STA_NO_ROOM_IN_TABLE: - IWL_ERR(priv, "Adding station %d failed, no room in table.\n", - sta_id); - break; - case ADD_STA_NO_BLOCK_ACK_RESOURCE: - IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n", - sta_id); - break; - case ADD_STA_MODIFY_NON_EXIST_STA: - IWL_ERR(priv, "Attempting to modify non-existing station %d\n", - sta_id); - break; - default: - IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", - pkt->u.add_sta.status); - break; - } - - IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n", - priv->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", - sta_id, priv->stations[sta_id].sta.sta.addr); - - /* - * XXX: The MAC address in the command buffer is often changed from - * the original sent to the device. That is, the MAC address - * written to the command buffer often is not the same MAC address - * read from the command buffer when the command returns. This - * issue has not yet been resolved and this debugging is left to - * observe the problem. - */ - IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n", - priv->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", - addsta->sta.addr); - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - - return ret; -} - -int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_addsta_cmd *addsta = - (struct iwl_addsta_cmd *) cmd->payload; - - return iwl_process_add_sta_resp(priv, addsta, pkt); -} - -static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data) -{ - u16 size = (u16)sizeof(struct iwl_addsta_cmd); - struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data; - memcpy(addsta, cmd, size); - /* resrved in 5000 */ - addsta->rate_n_flags = cpu_to_le16(0); - return size; -} - -int iwl_send_add_sta(struct iwl_priv *priv, - struct iwl_addsta_cmd *sta, u8 flags) -{ - int ret = 0; - u8 data[sizeof(*sta)]; - struct iwl_host_cmd cmd = { - .id = REPLY_ADD_STA, - .flags = flags, - .data = { data, }, - }; - u8 sta_id __maybe_unused = sta->sta.sta_id; - - IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", - sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); - - if (!(flags & CMD_ASYNC)) { - cmd.flags |= CMD_WANT_SKB; - might_sleep(); - } - - cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data); - ret = iwl_trans_send_cmd(trans(priv), &cmd); - - if (ret || (flags & CMD_ASYNC)) - return ret; - /*else the command was successfully sent in SYNC mode, need to free - * the reply page */ - - iwl_free_pages(priv->shrd, cmd.reply_page); - - if (cmd.handler_status) - IWL_ERR(priv, "%s - error in the CMD response %d", __func__, - cmd.handler_status); - - return cmd.handler_status; -} - -static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, - struct ieee80211_sta *sta, - struct iwl_rxon_context *ctx) -{ - struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; - __le32 sta_flags; - u8 mimo_ps_mode; - - if (!sta || !sta_ht_inf->ht_supported) - goto done; - - mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; - IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", - (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? - "static" : - (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? - "dynamic" : "disabled"); - - sta_flags = priv->stations[index].sta.station_flags; - - sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); - - switch (mimo_ps_mode) { - case WLAN_HT_CAP_SM_PS_STATIC: - sta_flags |= STA_FLG_MIMO_DIS_MSK; - break; - case WLAN_HT_CAP_SM_PS_DYNAMIC: - sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; - break; - case WLAN_HT_CAP_SM_PS_DISABLED: - break; - default: - IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); - break; - } - - sta_flags |= cpu_to_le32( - (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); - - sta_flags |= cpu_to_le32( - (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); - - if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) - sta_flags |= STA_FLG_HT40_EN_MSK; - else - sta_flags &= ~STA_FLG_HT40_EN_MSK; - - priv->stations[index].sta.station_flags = sta_flags; - done: - return; -} - -/** - * iwl_prep_station - Prepare station information for addition - * - * should be called with sta_lock held - */ -u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - const u8 *addr, bool is_ap, struct ieee80211_sta *sta) -{ - struct iwl_station_entry *station; - int i; - u8 sta_id = IWL_INVALID_STATION; - - if (is_ap) - sta_id = ctx->ap_sta_id; - else if (is_broadcast_ether_addr(addr)) - sta_id = ctx->bcast_sta_id; - else - for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { - if (!compare_ether_addr(priv->stations[i].sta.sta.addr, - addr)) { - sta_id = i; - break; - } - - if (!priv->stations[i].used && - sta_id == IWL_INVALID_STATION) - sta_id = i; - } - - /* - * These two conditions have the same outcome, but keep them - * separate - */ - if (unlikely(sta_id == IWL_INVALID_STATION)) - return sta_id; - - /* - * uCode is not able to deal with multiple requests to add a - * station. Keep track if one is in progress so that we do not send - * another. - */ - if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { - IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", - sta_id); - return sta_id; - } - - if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && - (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && - !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { - IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - return sta_id; - } - - station = &priv->stations[sta_id]; - station->used = IWL_STA_DRIVER_ACTIVE; - IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", - sta_id, addr); - priv->num_stations++; - - /* Set up the REPLY_ADD_STA command to send to device */ - memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); - memcpy(station->sta.sta.addr, addr, ETH_ALEN); - station->sta.mode = 0; - station->sta.sta.sta_id = sta_id; - station->sta.station_flags = ctx->station_flags; - station->ctxid = ctx->ctxid; - - if (sta) { - struct iwl_station_priv *sta_priv; - - sta_priv = (void *)sta->drv_priv; - sta_priv->ctx = ctx; - } - - /* - * OK to call unconditionally, since local stations (IBSS BSSID - * STA and broadcast STA) pass in a NULL sta, and mac80211 - * doesn't allow HT IBSS. - */ - iwl_set_ht_add_station(priv, sta_id, sta, ctx); - - return sta_id; - -} - -#define STA_WAIT_TIMEOUT (HZ/2) - -/** - * iwl_add_station_common - - */ -int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - const u8 *addr, bool is_ap, - struct ieee80211_sta *sta, u8 *sta_id_r) -{ - unsigned long flags_spin; - int ret = 0; - u8 sta_id; - struct iwl_addsta_cmd sta_cmd; - - *sta_id_r = 0; - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); - if (sta_id == IWL_INVALID_STATION) { - IWL_ERR(priv, "Unable to prepare station %pM for addition\n", - addr); - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - return -EINVAL; - } - - /* - * uCode is not able to deal with multiple requests to add a - * station. Keep track if one is in progress so that we do not send - * another. - */ - if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { - IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", - sta_id); - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - return -EEXIST; - } - - if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && - (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { - IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - return -EEXIST; - } - - priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; - memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - - /* Add station to device's station table */ - ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - IWL_ERR(priv, "Adding station %pM failed.\n", - priv->stations[sta_id].sta.sta.addr); - priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; - priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - } - *sta_id_r = sta_id; - return ret; -} - -/** - * iwl_sta_ucode_deactivate - deactivate ucode status for a station - * - * priv->shrd->sta_lock must be held - */ -static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) -{ - /* Ucode must be active and driver must be non active */ - if ((priv->stations[sta_id].used & - (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) - IWL_ERR(priv, "removed non active STA %u\n", sta_id); - - priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; - - memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); - IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); -} - -static int iwl_send_remove_station(struct iwl_priv *priv, - const u8 *addr, int sta_id, - bool temporary) -{ - struct iwl_rx_packet *pkt; - int ret; - - unsigned long flags_spin; - struct iwl_rem_sta_cmd rm_sta_cmd; - - struct iwl_host_cmd cmd = { - .id = REPLY_REMOVE_STA, - .len = { sizeof(struct iwl_rem_sta_cmd), }, - .flags = CMD_SYNC, - .data = { &rm_sta_cmd, }, - }; - - memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); - rm_sta_cmd.num_sta = 1; - memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); - - cmd.flags |= CMD_WANT_SKB; - - ret = iwl_trans_send_cmd(trans(priv), &cmd); - - if (ret) - return ret; - - pkt = (struct iwl_rx_packet *)cmd.reply_page; - if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { - IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", - pkt->hdr.flags); - ret = -EIO; - } - - if (!ret) { - switch (pkt->u.rem_sta.status) { - case REM_STA_SUCCESS_MSK: - if (!temporary) { - spin_lock_irqsave(&priv->shrd->sta_lock, - flags_spin); - iwl_sta_ucode_deactivate(priv, sta_id); - spin_unlock_irqrestore(&priv->shrd->sta_lock, - flags_spin); - } - IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); - break; - default: - ret = -EIO; - IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); - break; - } - } - iwl_free_pages(priv->shrd, cmd.reply_page); - - return ret; -} - -/** - * iwl_remove_station - Remove driver's knowledge of station. - */ -int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, - const u8 *addr) -{ - unsigned long flags; - - if (!iwl_is_ready(priv->shrd)) { - IWL_DEBUG_INFO(priv, - "Unable to remove station %pM, device not ready.\n", - addr); - /* - * It is typical for stations to be removed when we are - * going down. Return success since device will be down - * soon anyway - */ - return 0; - } - - IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", - sta_id, addr); - - if (WARN_ON(sta_id == IWL_INVALID_STATION)) - return -EINVAL; - - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - - if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { - IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", - addr); - goto out_err; - } - - if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { - IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", - addr); - goto out_err; - } - - if (priv->stations[sta_id].used & IWL_STA_LOCAL) { - kfree(priv->stations[sta_id].lq); - priv->stations[sta_id].lq = NULL; - } - - priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; - - priv->num_stations--; - - if (WARN_ON(priv->num_stations < 0)) - priv->num_stations = 0; - - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - - return iwl_send_remove_station(priv, addr, sta_id, false); -out_err: - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - return -EINVAL; -} - -/** - * iwl_clear_ucode_stations - clear ucode station table bits - * - * This function clears all the bits in the driver indicating - * which stations are active in the ucode. Call when something - * other than explicit station management would cause this in - * the ucode, e.g. unassociated RXON. - */ -void iwl_clear_ucode_stations(struct iwl_priv *priv, - struct iwl_rxon_context *ctx) -{ - int i; - unsigned long flags_spin; - bool cleared = false; - - IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); - - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - for (i = 0; i < IWLAGN_STATION_COUNT; i++) { - if (ctx && ctx->ctxid != priv->stations[i].ctxid) - continue; - - if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { - IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i); - priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; - cleared = true; - } - } - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - - if (!cleared) - IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n"); -} - -/** - * iwl_restore_stations() - Restore driver known stations to device - * - * All stations considered active by driver, but not present in ucode, is - * restored. - * - * Function sleeps. - */ -void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) -{ - struct iwl_addsta_cmd sta_cmd; - struct iwl_link_quality_cmd lq; - unsigned long flags_spin; - int i; - bool found = false; - int ret; - bool send_lq; - - if (!iwl_is_ready(priv->shrd)) { - IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); - return; - } - - IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - for (i = 0; i < IWLAGN_STATION_COUNT; i++) { - if (ctx->ctxid != priv->stations[i].ctxid) - continue; - if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && - !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { - IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", - priv->stations[i].sta.sta.addr); - priv->stations[i].sta.mode = 0; - priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; - found = true; - } - } - - for (i = 0; i < IWLAGN_STATION_COUNT; i++) { - if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { - memcpy(&sta_cmd, &priv->stations[i].sta, - sizeof(struct iwl_addsta_cmd)); - send_lq = false; - if (priv->stations[i].lq) { - if (priv->shrd->wowlan) - iwl_sta_fill_lq(priv, ctx, i, &lq); - else - memcpy(&lq, priv->stations[i].lq, - sizeof(struct iwl_link_quality_cmd)); - send_lq = true; - } - spin_unlock_irqrestore(&priv->shrd->sta_lock, - flags_spin); - ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&priv->shrd->sta_lock, - flags_spin); - IWL_ERR(priv, "Adding station %pM failed.\n", - priv->stations[i].sta.sta.addr); - priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE; - priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&priv->shrd->sta_lock, - flags_spin); - } - /* - * Rate scaling has already been initialized, send - * current LQ command - */ - if (send_lq) - iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; - } - } - - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - if (!found) - IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n"); - else - IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n"); -} - -void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) -{ - unsigned long flags; - int sta_id = ctx->ap_sta_id; - int ret; - struct iwl_addsta_cmd sta_cmd; - struct iwl_link_quality_cmd lq; - bool active; - - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - return; - } - - memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); - sta_cmd.mode = 0; - memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); - - active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; - priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - - if (active) { - ret = iwl_send_remove_station( - priv, priv->stations[sta_id].sta.sta.addr, - sta_id, true); - if (ret) - IWL_ERR(priv, "failed to remove STA %pM (%d)\n", - priv->stations[sta_id].sta.sta.addr, ret); - } - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); - - ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); - if (ret) - IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", - priv->stations[sta_id].sta.sta.addr, ret); - iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); -} - -int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) -{ - int i; - - for (i = 0; i < priv->sta_key_max_num; i++) - if (!test_and_set_bit(i, &priv->ucode_key_table)) - return i; - - return WEP_INVALID_OFFSET; -} - -void iwl_dealloc_bcast_stations(struct iwl_priv *priv) -{ - unsigned long flags; - int i; - - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - for (i = 0; i < IWLAGN_STATION_COUNT; i++) { - if (!(priv->stations[i].used & IWL_STA_BCAST)) - continue; - - priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; - priv->num_stations--; - if (WARN_ON(priv->num_stations < 0)) - priv->num_stations = 0; - kfree(priv->stations[i].lq); - priv->stations[i].lq = NULL; - } - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); -} - -#ifdef CONFIG_IWLWIFI_DEBUG -static void iwl_dump_lq_cmd(struct iwl_priv *priv, - struct iwl_link_quality_cmd *lq) -{ - int i; - IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); - IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", - lq->general_params.single_stream_ant_msk, - lq->general_params.dual_stream_ant_msk); - - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) - IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", - i, lq->rs_table[i].rate_n_flags); -} -#else -static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, - struct iwl_link_quality_cmd *lq) -{ -} -#endif - -/** - * is_lq_table_valid() - Test one aspect of LQ cmd for validity - * - * It sometimes happens when a HT rate has been in use and we - * loose connectivity with AP then mac80211 will first tell us that the - * current channel is not HT anymore before removing the station. In such a - * scenario the RXON flags will be updated to indicate we are not - * communicating HT anymore, but the LQ command may still contain HT rates. - * Test for this to prevent driver from sending LQ command between the time - * RXON flags are updated and when LQ command is updated. - */ -static bool is_lq_table_valid(struct iwl_priv *priv, - struct iwl_rxon_context *ctx, - struct iwl_link_quality_cmd *lq) -{ - int i; - - if (ctx->ht.enabled) - return true; - - IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", - ctx->active.channel); - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { - if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { - IWL_DEBUG_INFO(priv, - "index %d of LQ expects HT channel\n", - i); - return false; - } - } - return true; -} - -/** - * iwl_send_lq_cmd() - Send link quality command - * @init: This command is sent as part of station initialization right - * after station has been added. - * - * The link quality command is sent as the last step of station creation. - * This is the special case in which init is set and we call a callback in - * this case to clear the state indicating that station creation is in - * progress. - */ -int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - struct iwl_link_quality_cmd *lq, u8 flags, bool init) -{ - int ret = 0; - unsigned long flags_spin; - - struct iwl_host_cmd cmd = { - .id = REPLY_TX_LINK_QUALITY_CMD, - .len = { sizeof(struct iwl_link_quality_cmd), }, - .flags = flags, - .data = { lq, }, - }; - - if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) - return -EINVAL; - - - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - return -EINVAL; - } - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - - iwl_dump_lq_cmd(priv, lq); - if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) - return -EINVAL; - - if (is_lq_table_valid(priv, ctx, lq)) - ret = iwl_trans_send_cmd(trans(priv), &cmd); - else - ret = -EINVAL; - - if (cmd.flags & CMD_ASYNC) - return ret; - - if (init) { - IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n", - lq->sta_id); - spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); - priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); - } - return ret; -} - -int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta) -{ - struct iwl_priv *priv = hw->priv; - struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; - int ret; - - IWL_DEBUG_MAC80211(priv, "enter: received request to remove " - "station %pM\n", sta->addr); - mutex_lock(&priv->shrd->mutex); - IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", - sta->addr); - ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); - if (ret) - IWL_ERR(priv, "Error removing station %pM\n", - sta->addr); - mutex_unlock(&priv->shrd->mutex); - IWL_DEBUG_MAC80211(priv, "leave\n"); - - return ret; -} diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.h b/drivers/net/wireless/iwlwifi/iwl-sta.h deleted file mode 100644 index 73b4af268c3c..000000000000 --- a/drivers/net/wireless/iwlwifi/iwl-sta.h +++ /dev/null @@ -1,143 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. - * - * Portions of this file are derived from the ipw3945 project, as well - * as portions of the ieee80211 subsystem header files. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ -#ifndef __iwl_sta_h__ -#define __iwl_sta_h__ - -#include "iwl-dev.h" - -#define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */ -#define IWL_STA_UCODE_ACTIVE BIT(1) /* ucode entry is active */ -#define IWL_STA_UCODE_INPROGRESS BIT(2) /* ucode entry is in process of - being activated */ -#define IWL_STA_LOCAL BIT(3) /* station state not directed by mac80211; - (this is for the IBSS BSSID stations) */ -#define IWL_STA_BCAST BIT(4) /* this station is the special bcast station */ - - -void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx); -void iwl_clear_ucode_stations(struct iwl_priv *priv, - struct iwl_rxon_context *ctx); -void iwl_dealloc_bcast_stations(struct iwl_priv *priv); -int iwl_get_free_ucode_key_offset(struct iwl_priv *priv); -int iwl_send_add_sta(struct iwl_priv *priv, - struct iwl_addsta_cmd *sta, u8 flags); -int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - const u8 *addr, bool is_ap, - struct ieee80211_sta *sta, u8 *sta_id_r); -int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, - const u8 *addr); -int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, - struct ieee80211_sta *sta); - -u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - const u8 *addr, bool is_ap, struct ieee80211_sta *sta); - -void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - u8 sta_id, struct iwl_link_quality_cmd *link_cmd); -int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, - struct iwl_link_quality_cmd *lq, u8 flags, bool init); -void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx); -int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, - struct iwl_device_cmd *cmd); - - -/** - * iwl_clear_driver_stations - clear knowledge of all stations from driver - * @priv: iwl priv struct - * - * This is called during iwl_down() to make sure that in the case - * we're coming there from a hardware restart mac80211 will be - * able to reconfigure stations -- if we're getting there in the - * normal down flow then the stations will already be cleared. - */ -static inline void iwl_clear_driver_stations(struct iwl_priv *priv) -{ - unsigned long flags; - struct iwl_rxon_context *ctx; - - spin_lock_irqsave(&priv->shrd->sta_lock, flags); - memset(priv->stations, 0, sizeof(priv->stations)); - priv->num_stations = 0; - - priv->ucode_key_table = 0; - - for_each_context(priv, ctx) { - /* - * Remove all key information that is not stored as part - * of station information since mac80211 may not have had - * a chance to remove all the keys. When device is - * reconfigured by mac80211 after an error all keys will - * be reconfigured. - */ - memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys)); - ctx->key_mapping_keys = 0; - } - - spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); -} - -static inline int iwl_sta_id(struct ieee80211_sta *sta) -{ - if (WARN_ON(!sta)) - return IWL_INVALID_STATION; - - return ((struct iwl_station_priv *)sta->drv_priv)->sta_id; -} - -/** - * iwl_sta_id_or_broadcast - return sta_id or broadcast sta - * @priv: iwl priv - * @context: the current context - * @sta: mac80211 station - * - * In certain circumstances mac80211 passes a station pointer - * that may be %NULL, for example during TX or key setup. In - * that case, we need to use the broadcast station, so this - * inline wraps that pattern. - */ -static inline int iwl_sta_id_or_broadcast(struct iwl_priv *priv, - struct iwl_rxon_context *context, - struct ieee80211_sta *sta) -{ - int sta_id; - - if (!sta) - return context->bcast_sta_id; - - sta_id = iwl_sta_id(sta); - - /* - * mac80211 should not be passing a partially - * initialised station! - */ - WARN_ON(sta_id == IWL_INVALID_STATION); - - return sta_id; -} -#endif /* __iwl_sta_h__ */ |