iwlagn: merge station management functions
After driver split, no need to separate station management functions
in two files, merge it
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
index c1807fa..ed62836 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 @@
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 @@
}
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 @@
*
* 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 @@
/* 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 @@
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 @@
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;
}