diff options
Diffstat (limited to 'drivers/net/wireless/iwlegacy/iwl-sta.c')
| -rw-r--r-- | drivers/net/wireless/iwlegacy/iwl-sta.c | 817 |
1 files changed, 0 insertions, 817 deletions
diff --git a/drivers/net/wireless/iwlegacy/iwl-sta.c b/drivers/net/wireless/iwlegacy/iwl-sta.c deleted file mode 100644 index 75fe315f66b..00000000000 --- a/drivers/net/wireless/iwlegacy/iwl-sta.c +++ /dev/null @@ -1,817 +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 <linux/export.h> - -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" - -/* il->sta_lock must be held */ -static void il_sta_ucode_activate(struct il_priv *il, u8 sta_id) -{ - - if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) - IL_ERR( - "ACTIVATE a non DRIVER active station id %u addr %pM\n", - sta_id, il->stations[sta_id].sta.sta.addr); - - if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) { - D_ASSOC( - "STA id %u addr %pM already present" - " in uCode (according to driver)\n", - sta_id, il->stations[sta_id].sta.sta.addr); - } else { - il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE; - D_ASSOC("Added STA id %u addr %pM to uCode\n", - sta_id, il->stations[sta_id].sta.sta.addr); - } -} - -static int il_process_add_sta_resp(struct il_priv *il, - struct il_addsta_cmd *addsta, - struct il_rx_pkt *pkt, - bool sync) -{ - u8 sta_id = addsta->sta.sta_id; - unsigned long flags; - int ret = -EIO; - - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", - pkt->hdr.flags); - return ret; - } - - D_INFO("Processing response for adding station %u\n", - sta_id); - - spin_lock_irqsave(&il->sta_lock, flags); - - switch (pkt->u.add_sta.status) { - case ADD_STA_SUCCESS_MSK: - D_INFO("C_ADD_STA PASSED\n"); - il_sta_ucode_activate(il, sta_id); - ret = 0; - break; - case ADD_STA_NO_ROOM_IN_TBL: - IL_ERR("Adding station %d failed, no room in table.\n", - sta_id); - break; - case ADD_STA_NO_BLOCK_ACK_RESOURCE: - IL_ERR( - "Adding station %d failed, no block ack resource.\n", - sta_id); - break; - case ADD_STA_MODIFY_NON_EXIST_STA: - IL_ERR("Attempting to modify non-existing station %d\n", - sta_id); - break; - default: - D_ASSOC("Received C_ADD_STA:(0x%08X)\n", - pkt->u.add_sta.status); - break; - } - - D_INFO("%s station id %u addr %pM\n", - il->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", - sta_id, il->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. - */ - D_INFO("%s station according to cmd buffer %pM\n", - il->stations[sta_id].sta.mode == - STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", - addsta->sta.addr); - spin_unlock_irqrestore(&il->sta_lock, flags); - - return ret; -} - -static void il_add_sta_callback(struct il_priv *il, - struct il_device_cmd *cmd, - struct il_rx_pkt *pkt) -{ - struct il_addsta_cmd *addsta = - (struct il_addsta_cmd *)cmd->cmd.payload; - - il_process_add_sta_resp(il, addsta, pkt, false); - -} - -int il_send_add_sta(struct il_priv *il, - struct il_addsta_cmd *sta, u8 flags) -{ - struct il_rx_pkt *pkt = NULL; - int ret = 0; - u8 data[sizeof(*sta)]; - struct il_host_cmd cmd = { - .id = C_ADD_STA, - .flags = flags, - .data = data, - }; - u8 sta_id __maybe_unused = sta->sta.sta_id; - - D_INFO("Adding sta %u (%pM) %ssynchronously\n", - sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); - - if (flags & CMD_ASYNC) - cmd.callback = il_add_sta_callback; - else { - cmd.flags |= CMD_WANT_SKB; - might_sleep(); - } - - cmd.len = il->cfg->ops->utils->build_addsta_hcmd(sta, data); - ret = il_send_cmd(il, &cmd); - - if (ret || (flags & CMD_ASYNC)) - return ret; - - if (ret == 0) { - pkt = (struct il_rx_pkt *)cmd.reply_page; - ret = il_process_add_sta_resp(il, sta, pkt, true); - } - il_free_pages(il, cmd.reply_page); - - return ret; -} -EXPORT_SYMBOL(il_send_add_sta); - -static void il_set_ht_add_station(struct il_priv *il, u8 idx, - struct ieee80211_sta *sta, - struct il_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; - D_ASSOC("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 = il->stations[idx].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: - IL_WARN("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 (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap)) - sta_flags |= STA_FLG_HT40_EN_MSK; - else - sta_flags &= ~STA_FLG_HT40_EN_MSK; - - il->stations[idx].sta.station_flags = sta_flags; - done: - return; -} - -/** - * il_prep_station - Prepare station information for addition - * - * should be called with sta_lock held - */ -u8 il_prep_station(struct il_priv *il, struct il_rxon_context *ctx, - const u8 *addr, bool is_ap, struct ieee80211_sta *sta) -{ - struct il_station_entry *station; - int i; - u8 sta_id = IL_INVALID_STATION; - u16 rate; - - 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 = IL_STA_ID; i < il->hw_params.max_stations; i++) { - if (!compare_ether_addr(il->stations[i].sta.sta.addr, - addr)) { - sta_id = i; - break; - } - - if (!il->stations[i].used && - sta_id == IL_INVALID_STATION) - sta_id = i; - } - - /* - * These two conditions have the same outcome, but keep them - * separate - */ - if (unlikely(sta_id == IL_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 (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { - D_INFO( - "STA %d already in process of being added.\n", - sta_id); - return sta_id; - } - - if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && - (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) && - !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) { - D_ASSOC( - "STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - return sta_id; - } - - station = &il->stations[sta_id]; - station->used = IL_STA_DRIVER_ACTIVE; - D_ASSOC("Add STA to driver ID %d: %pM\n", - sta_id, addr); - il->num_stations++; - - /* Set up the C_ADD_STA command to send to device */ - memset(&station->sta, 0, sizeof(struct il_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 il_station_priv_common *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. - */ - il_set_ht_add_station(il, sta_id, sta, ctx); - - /* 3945 only */ - rate = (il->band == IEEE80211_BAND_5GHZ) ? - RATE_6M_PLCP : RATE_1M_PLCP; - /* Turn on both antennas for the station... */ - station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK); - - return sta_id; - -} -EXPORT_SYMBOL_GPL(il_prep_station); - -#define STA_WAIT_TIMEOUT (HZ/2) - -/** - * il_add_station_common - - */ -int -il_add_station_common(struct il_priv *il, - struct il_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 il_addsta_cmd sta_cmd; - - *sta_id_r = 0; - spin_lock_irqsave(&il->sta_lock, flags_spin); - sta_id = il_prep_station(il, ctx, addr, is_ap, sta); - if (sta_id == IL_INVALID_STATION) { - IL_ERR("Unable to prepare station %pM for addition\n", - addr); - spin_unlock_irqrestore(&il->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 (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { - D_INFO( - "STA %d already in process of being added.\n", - sta_id); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EEXIST; - } - - if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && - (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { - D_ASSOC( - "STA %d (%pM) already added, not adding again.\n", - sta_id, addr); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EEXIST; - } - - il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS; - memcpy(&sta_cmd, &il->stations[sta_id].sta, - sizeof(struct il_addsta_cmd)); - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - /* Add station to device's station table */ - ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&il->sta_lock, flags_spin); - IL_ERR("Adding station %pM failed.\n", - il->stations[sta_id].sta.sta.addr); - il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; - il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - } - *sta_id_r = sta_id; - return ret; -} -EXPORT_SYMBOL(il_add_station_common); - -/** - * il_sta_ucode_deactivate - deactivate ucode status for a station - * - * il->sta_lock must be held - */ -static void il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id) -{ - /* Ucode must be active and driver must be non active */ - if ((il->stations[sta_id].used & - (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) != - IL_STA_UCODE_ACTIVE) - IL_ERR("removed non active STA %u\n", sta_id); - - il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE; - - memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry)); - D_ASSOC("Removed STA %u\n", sta_id); -} - -static int il_send_remove_station(struct il_priv *il, - const u8 *addr, int sta_id, - bool temporary) -{ - struct il_rx_pkt *pkt; - int ret; - - unsigned long flags_spin; - struct il_rem_sta_cmd rm_sta_cmd; - - struct il_host_cmd cmd = { - .id = C_REM_STA, - .len = sizeof(struct il_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 = il_send_cmd(il, &cmd); - - if (ret) - return ret; - - pkt = (struct il_rx_pkt *)cmd.reply_page; - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from C_REM_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(&il->sta_lock, flags_spin); - il_sta_ucode_deactivate(il, sta_id); - spin_unlock_irqrestore(&il->sta_lock, - flags_spin); - } - D_ASSOC("C_REM_STA PASSED\n"); - break; - default: - ret = -EIO; - IL_ERR("C_REM_STA failed\n"); - break; - } - } - il_free_pages(il, cmd.reply_page); - - return ret; -} - -/** - * il_remove_station - Remove driver's knowledge of station. - */ -int il_remove_station(struct il_priv *il, const u8 sta_id, - const u8 *addr) -{ - unsigned long flags; - - if (!il_is_ready(il)) { - D_INFO( - "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; - } - - D_ASSOC("Removing STA from driver:%d %pM\n", - sta_id, addr); - - if (WARN_ON(sta_id == IL_INVALID_STATION)) - return -EINVAL; - - spin_lock_irqsave(&il->sta_lock, flags); - - if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) { - D_INFO("Removing %pM but non DRIVER active\n", - addr); - goto out_err; - } - - if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { - D_INFO("Removing %pM but non UCODE active\n", - addr); - goto out_err; - } - - if (il->stations[sta_id].used & IL_STA_LOCAL) { - kfree(il->stations[sta_id].lq); - il->stations[sta_id].lq = NULL; - } - - il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; - - il->num_stations--; - - BUG_ON(il->num_stations < 0); - - spin_unlock_irqrestore(&il->sta_lock, flags); - - return il_send_remove_station(il, addr, sta_id, false); -out_err: - spin_unlock_irqrestore(&il->sta_lock, flags); - return -EINVAL; -} -EXPORT_SYMBOL_GPL(il_remove_station); - -/** - * il_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 il_clear_ucode_stations(struct il_priv *il, - struct il_rxon_context *ctx) -{ - int i; - unsigned long flags_spin; - bool cleared = false; - - D_INFO("Clearing ucode stations in driver\n"); - - spin_lock_irqsave(&il->sta_lock, flags_spin); - for (i = 0; i < il->hw_params.max_stations; i++) { - if (ctx && ctx->ctxid != il->stations[i].ctxid) - continue; - - if (il->stations[i].used & IL_STA_UCODE_ACTIVE) { - D_INFO( - "Clearing ucode active for station %d\n", i); - il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; - cleared = true; - } - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - if (!cleared) - D_INFO( - "No active stations found to be cleared\n"); -} -EXPORT_SYMBOL(il_clear_ucode_stations); - -/** - * il_restore_stations() - Restore driver known stations to device - * - * All stations considered active by driver, but not present in ucode, is - * restored. - * - * Function sleeps. - */ -void -il_restore_stations(struct il_priv *il, struct il_rxon_context *ctx) -{ - struct il_addsta_cmd sta_cmd; - struct il_link_quality_cmd lq; - unsigned long flags_spin; - int i; - bool found = false; - int ret; - bool send_lq; - - if (!il_is_ready(il)) { - D_INFO( - "Not ready yet, not restoring any stations.\n"); - return; - } - - D_ASSOC("Restoring all known stations ... start.\n"); - spin_lock_irqsave(&il->sta_lock, flags_spin); - for (i = 0; i < il->hw_params.max_stations; i++) { - if (ctx->ctxid != il->stations[i].ctxid) - continue; - if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) && - !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) { - D_ASSOC("Restoring sta %pM\n", - il->stations[i].sta.sta.addr); - il->stations[i].sta.mode = 0; - il->stations[i].used |= IL_STA_UCODE_INPROGRESS; - found = true; - } - } - - for (i = 0; i < il->hw_params.max_stations; i++) { - if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) { - memcpy(&sta_cmd, &il->stations[i].sta, - sizeof(struct il_addsta_cmd)); - send_lq = false; - if (il->stations[i].lq) { - memcpy(&lq, il->stations[i].lq, - sizeof(struct il_link_quality_cmd)); - send_lq = true; - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); - if (ret) { - spin_lock_irqsave(&il->sta_lock, flags_spin); - IL_ERR("Adding station %pM failed.\n", - il->stations[i].sta.sta.addr); - il->stations[i].used &= - ~IL_STA_DRIVER_ACTIVE; - il->stations[i].used &= - ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, - flags_spin); - } - /* - * Rate scaling has already been initialized, send - * current LQ command - */ - if (send_lq) - il_send_lq_cmd(il, ctx, &lq, - CMD_SYNC, true); - spin_lock_irqsave(&il->sta_lock, flags_spin); - il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS; - } - } - - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - if (!found) - D_INFO("Restoring all known stations" - " .... no stations to be restored.\n"); - else - D_INFO("Restoring all known stations" - " .... complete.\n"); -} -EXPORT_SYMBOL(il_restore_stations); - -int il_get_free_ucode_key_idx(struct il_priv *il) -{ - int i; - - for (i = 0; i < il->sta_key_max_num; i++) - if (!test_and_set_bit(i, &il->ucode_key_table)) - return i; - - return WEP_INVALID_OFFSET; -} -EXPORT_SYMBOL(il_get_free_ucode_key_idx); - -void il_dealloc_bcast_stations(struct il_priv *il) -{ - unsigned long flags; - int i; - - spin_lock_irqsave(&il->sta_lock, flags); - for (i = 0; i < il->hw_params.max_stations; i++) { - if (!(il->stations[i].used & IL_STA_BCAST)) - continue; - - il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; - il->num_stations--; - BUG_ON(il->num_stations < 0); - kfree(il->stations[i].lq); - il->stations[i].lq = NULL; - } - spin_unlock_irqrestore(&il->sta_lock, flags); -} -EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations); - -#ifdef CONFIG_IWLEGACY_DEBUG -static void il_dump_lq_cmd(struct il_priv *il, - struct il_link_quality_cmd *lq) -{ - int i; - D_RATE("lq station id 0x%x\n", lq->sta_id); - D_RATE("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++) - D_RATE("lq idx %d 0x%X\n", - i, lq->rs_table[i].rate_n_flags); -} -#else -static inline void il_dump_lq_cmd(struct il_priv *il, - struct il_link_quality_cmd *lq) -{ -} -#endif - -/** - * il_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 il_is_lq_table_valid(struct il_priv *il, - struct il_rxon_context *ctx, - struct il_link_quality_cmd *lq) -{ - int i; - - if (ctx->ht.enabled) - return true; - - D_INFO("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) { - D_INFO( - "idx %d of LQ expects HT channel\n", - i); - return false; - } - } - return true; -} - -/** - * il_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 il_send_lq_cmd(struct il_priv *il, struct il_rxon_context *ctx, - struct il_link_quality_cmd *lq, u8 flags, bool init) -{ - int ret = 0; - unsigned long flags_spin; - - struct il_host_cmd cmd = { - .id = C_TX_LINK_QUALITY_CMD, - .len = sizeof(struct il_link_quality_cmd), - .flags = flags, - .data = lq, - }; - - if (WARN_ON(lq->sta_id == IL_INVALID_STATION)) - return -EINVAL; - - - spin_lock_irqsave(&il->sta_lock, flags_spin); - if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) { - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - return -EINVAL; - } - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - - il_dump_lq_cmd(il, lq); - BUG_ON(init && (cmd.flags & CMD_ASYNC)); - - if (il_is_lq_table_valid(il, ctx, lq)) - ret = il_send_cmd(il, &cmd); - else - ret = -EINVAL; - - if (cmd.flags & CMD_ASYNC) - return ret; - - if (init) { - D_INFO("init LQ command complete," - " clearing sta addition status for sta %d\n", - lq->sta_id); - spin_lock_irqsave(&il->sta_lock, flags_spin); - il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS; - spin_unlock_irqrestore(&il->sta_lock, flags_spin); - } - return ret; -} -EXPORT_SYMBOL(il_send_lq_cmd); - -int il_mac_sta_remove(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta) -{ - struct il_priv *il = hw->priv; - struct il_station_priv_common *sta_common = (void *)sta->drv_priv; - int ret; - - D_INFO("received request to remove station %pM\n", - sta->addr); - mutex_lock(&il->mutex); - D_INFO("proceeding to remove station %pM\n", - sta->addr); - ret = il_remove_station(il, sta_common->sta_id, sta->addr); - if (ret) - IL_ERR("Error removing station %pM\n", - sta->addr); - mutex_unlock(&il->mutex); - return ret; -} -EXPORT_SYMBOL(il_mac_sta_remove); |