From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
This patch makes the station table maintenance safer. Two flags are
maintained:
1) if station is present in driver
2) if station is present in uCode
This will allow us in the future to deal with more stations than the
firmware allows.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Signed-off-by: Zhu Yi <yi.zhu@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-core.c | 4 +
drivers/net/wireless/iwlwifi/iwl-sta.c | 146 +++++++++++++++++---------
drivers/net/wireless/iwlwifi/iwl-sta.h | 2 +-
drivers/net/wireless/iwlwifi/iwl4965-base.c | 1 -
4 files changed, 100 insertions(+), 53 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index eb74a40..1c0670b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -284,6 +284,10 @@ void iwlcore_clear_stations_table(struct iwl_priv *priv)
spin_lock_irqsave(&priv->sta_lock, flags);
priv->num_stations = 0;
+ if (iwl_is_alive(priv) &&
+ iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
+ IWL_ERROR("Couldn't clear the station table\n");
+
memset(priv->stations, 0, sizeof(priv->stations));
spin_unlock_irqrestore(&priv->sta_lock, flags);
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index f874e7d..c81ab5f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -36,8 +36,8 @@
#include "iwl-helpers.h"
-#define IWL_STA_DRIVER_ACTIVE 0x1 /* ucode entry is active */
-#define IWL_STA_UCODE_ACTIVE 0x2 /* ucode entry is active */
+#define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
+#define IWL_STA_UCODE_ACTIVE BIT(1) /* ucode entry is active */
u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
{
@@ -83,10 +83,28 @@ int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
}
EXPORT_SYMBOL(iwl_get_ra_sta_id);
+static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
+{
+ unsigned long flags;
+ DECLARE_MAC_BUF(mac);
+
+ spin_lock_irqsave(&priv->sta_lock, flags);
+
+ if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
+ IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
+
+ priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
+ IWL_DEBUG_ASSOC("Added STA to Ucode: %s\n",
+ print_mac(mac, priv->stations[sta_id].sta.sta.addr));
+
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
+}
+
static int iwl_add_sta_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd, struct sk_buff *skb)
{
struct iwl_rx_packet *res = NULL;
+ u8 sta_id = cmd->cmd.addsta.sta.sta_id;
if (!skb) {
IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
@@ -102,8 +120,8 @@ static int iwl_add_sta_callback(struct iwl_priv *priv,
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
- /* FIXME: implement iwl_sta_ucode_activate(priv, addr); */
- /* fail through */
+ iwl_sta_ucode_activate(priv, sta_id);
+ /* fall through */
default:
IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
res->u.add_sta.status);
@@ -147,6 +165,7 @@ int iwl_send_add_sta(struct iwl_priv *priv,
if (ret == 0) {
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
+ iwl_sta_ucode_activate(priv, sta->sta.sta_id);
IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
break;
default:
@@ -215,88 +234,92 @@ u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
u8 flags, struct ieee80211_ht_info *ht_info)
{
int i;
- int index = IWL_INVALID_STATION;
+ int sta_id = IWL_INVALID_STATION;
struct iwl_station_entry *station;
unsigned long flags_spin;
DECLARE_MAC_BUF(mac);
spin_lock_irqsave(&priv->sta_lock, flags_spin);
if (is_ap)
- index = IWL_AP_ID;
+ sta_id = IWL_AP_ID;
else if (is_broadcast_ether_addr(addr))
- index = priv->hw_params.bcast_sta_id;
+ sta_id = priv->hw_params.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr)) {
- index = i;
+ sta_id = i;
break;
}
if (!priv->stations[i].used &&
- index == IWL_INVALID_STATION)
- index = i;
+ sta_id == IWL_INVALID_STATION)
+ sta_id = i;
}
-
/* These two conditions have the same outcome, but keep them separate
- since they have different meanings */
- if (unlikely(index == IWL_INVALID_STATION)) {
+ since they have different meanings */
+ if (unlikely(sta_id == IWL_INVALID_STATION)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
- return index;
+ return sta_id;
}
- if (priv->stations[index].used &&
- !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
+ if (priv->stations[sta_id].used &&
+ !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
- return index;
+ return sta_id;
}
- IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
- station = &priv->stations[index];
- station->used = 1;
+ station = &priv->stations[sta_id];
+ station->used = IWL_STA_DRIVER_ACTIVE;
+ IWL_DEBUG_ASSOC("Add STA to driver ID %d: %s\n",
+ sta_id, print_mac(mac, 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 = index;
+ station->sta.sta.sta_id = sta_id;
station->sta.station_flags = 0;
/* BCAST station and IBSS stations do not work in HT mode */
- if (index != priv->hw_params.bcast_sta_id &&
+ if (sta_id != priv->hw_params.bcast_sta_id &&
priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
- iwl_set_ht_add_station(priv, index, ht_info);
+ iwl_set_ht_add_station(priv, sta_id, ht_info);
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
/* Add station to device's station table */
iwl_send_add_sta(priv, &station->sta, flags);
- return index;
+ return sta_id;
}
EXPORT_SYMBOL(iwl_add_station_flags);
-static int iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
+static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
{
unsigned long flags;
- u8 sta_id;
DECLARE_MAC_BUF(mac);
- sta_id = iwl_find_station(priv, addr);
- if (sta_id != IWL_INVALID_STATION) {
- IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
- print_mac(mac, addr));
- spin_lock_irqsave(&priv->sta_lock, flags);
- priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
- memset(&priv->stations[sta_id], 0,
- sizeof(struct iwl_station_entry));
- spin_unlock_irqrestore(&priv->sta_lock, flags);
- return 0;
- }
- return -EINVAL;
+ u8 sta_id = iwl_find_station(priv, addr);
+
+ BUG_ON(sta_id == IWL_INVALID_STATION);
+
+ IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
+ print_mac(mac, addr));
+
+ spin_lock_irqsave(&priv->sta_lock, flags);
+
+ /* Ucode must be active and driver must be non active */
+ if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
+ IWL_ERROR("removed non active STA %d\n", sta_id);
+
+ priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
+
+ memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
}
static int iwl_remove_sta_callback(struct iwl_priv *priv,
@@ -322,6 +345,7 @@ static int iwl_remove_sta_callback(struct iwl_priv *priv,
iwl_sta_ucode_deactivate(priv, addr);
break;
default:
+ IWL_ERROR("REPLY_REMOVE_STA failed\n");
break;
}
@@ -386,44 +410,63 @@ static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
/**
* iwl_remove_station - Remove driver's knowledge of station.
*/
-u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
+int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
- int index = IWL_INVALID_STATION;
- int i;
+ int sta_id = IWL_INVALID_STATION;
+ int i, ret = -EINVAL;
unsigned long flags;
+ DECLARE_MAC_BUF(mac);
spin_lock_irqsave(&priv->sta_lock, flags);
if (is_ap)
- index = IWL_AP_ID;
+ sta_id = IWL_AP_ID;
else if (is_broadcast_ether_addr(addr))
- index = priv->hw_params.bcast_sta_id;
+ sta_id = priv->hw_params.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
if (priv->stations[i].used &&
!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr)) {
- index = i;
+ sta_id = i;
break;
}
- if (unlikely(index == IWL_INVALID_STATION))
+ if (unlikely(sta_id == IWL_INVALID_STATION))
goto out;
- if (priv->stations[index].used) {
- priv->stations[index].used = 0;
- priv->num_stations--;
+ IWL_DEBUG_ASSOC("Removing STA from driver:%d %s\n",
+ sta_id, print_mac(mac, addr));
+
+ if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
+ IWL_ERROR("Removing %s but non DRIVER active\n",
+ print_mac(mac, addr));
+ goto out;
+ }
+
+ if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
+ IWL_ERROR("Removing %s but non UCODE active\n",
+ print_mac(mac, addr));
+ goto out;
}
+
+ priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
+
+ priv->num_stations--;
+
BUG_ON(priv->num_stations < 0);
+
spin_unlock_irqrestore(&priv->sta_lock, flags);
- iwl_send_remove_station(priv, addr, CMD_ASYNC);
- return index;
+
+ ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
+ return ret;
out:
spin_unlock_irqrestore(&priv->sta_lock, flags);
- return 0;
+ return ret;
}
EXPORT_SYMBOL(iwl_remove_station);
+
static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
{
int i;
@@ -845,6 +888,7 @@ static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
sizeof(link_cmd), &link_cmd, NULL);
}
+
/**
* iwl_rxon_add_station - add station into station table.
*
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.h b/drivers/net/wireless/iwlwifi/iwl-sta.h
index b6bb209..221b93e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.h
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.h
@@ -48,7 +48,7 @@ int iwl_set_dynamic_key(struct iwl_priv *priv,
int iwl_remove_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *key, u8 sta_id);
int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap);
-u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap);
+int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap);
int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr);
void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid);
int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr);
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 6eee28d..1558b9a 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -315,7 +315,6 @@ static int iwl4965_commit_rxon(struct iwl_priv *priv)
return rc;
}
- iwl_remove_station(priv, iwl_bcast_addr, 0);
iwlcore_clear_stations_table(priv);
if (!priv->error_recovering)
--
1.5.3.6
--
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