Atheros AR600x driver + build glue

chromeos/drivers/ath6kl/wlan/src/wlan_node.c

+//------------------------------------------------------------------------------
+// <copyright file="wlan_node.c" company="Atheros">
+//    Copyright (c) 2004-2008 Atheros Corporation.  All rights reserved.
+// 
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// Software distributed under the License is distributed on an "AS
+// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// rights and limitations under the License.
+//
+//
+//------------------------------------------------------------------------------
+//==============================================================================
+// IEEE 802.11 node handling support.
+//
+// Author(s): ="Atheros"
+//==============================================================================
+#include <a_config.h>
+#include <athdefs.h>
+#include <a_types.h>
+#include <a_osapi.h>
+#define ATH_MODULE_NAME wlan
+#include <a_debug.h>
+#include "htc.h"
+#include "htc_api.h"
+#include <wmi.h>
+#include <ieee80211.h>
+#include <wlan_api.h>
+#include <wmi_api.h>
+#include <ieee80211_node.h>
+
+#define ATH_DEBUG_WLAN ATH_DEBUG_MAKE_MODULE_MASK(0)
+
+#ifdef DEBUG
+
+static ATH_DEBUG_MASK_DESCRIPTION wlan_debug_desc[] = {
+    { ATH_DEBUG_WLAN , "General WLAN Node Tracing"},
+};
+
+ATH_DEBUG_INSTANTIATE_MODULE_VAR(wlan,
+                                 "wlan",
+                                 "WLAN Node Management",
+                                 ATH_DEBUG_MASK_DEFAULTS,
+                                 ATH_DEBUG_DESCRIPTION_COUNT(wlan_debug_desc),
+                                 wlan_debug_desc);
+                                 
+#endif
+
+static void wlan_node_timeout(A_ATH_TIMER arg);
+
+static bss_t * _ieee80211_find_node (struct ieee80211_node_table *nt,
+                                     const A_UINT8 *macaddr);
+
+bss_t *
+wlan_node_alloc(struct ieee80211_node_table *nt, int wh_size)
+{
+    bss_t *ni;
+
+    ni = A_MALLOC_NOWAIT(sizeof(bss_t));
+
+    if (ni != NULL) {
+        if (wh_size)
+        {
+        ni->ni_buf = A_MALLOC_NOWAIT(wh_size);
+        if (ni->ni_buf == NULL) {
+            A_FREE(ni);
+            ni = NULL;
+            return ni;
+        }
+        }
+    } else {
+        return ni;
+    }
+
+    /* Make sure our lists are clean */
+    ni->ni_list_next = NULL;
+    ni->ni_list_prev = NULL;
+    ni->ni_hash_next = NULL;
+    ni->ni_hash_prev = NULL;
+
+    //
+    // ni_scangen never initialized before and during suspend/resume of winmobile,
+    // that some junk has been stored in this, due to this scan list didn't properly updated
+    //
+    ni->ni_scangen   = 0;
+
+#ifdef OS_ROAM_MANAGEMENT
+    ni->ni_si_gen    = 0;
+#endif
+
+    return ni;
+}
+
+void
+wlan_node_free(bss_t *ni)
+{
+    if (ni->ni_buf != NULL) {
+        A_FREE(ni->ni_buf);
+    }
+    A_FREE(ni);
+}
+
+void
+wlan_setup_node(struct ieee80211_node_table *nt, bss_t *ni,
+                const A_UINT8 *macaddr)
+{
+    int hash;
+    A_UINT32 timeoutValue = 0;
+
+    A_MEMCPY(ni->ni_macaddr, macaddr, IEEE80211_ADDR_LEN);
+    hash = IEEE80211_NODE_HASH (macaddr);
+    ieee80211_node_initref (ni);     /* mark referenced */
+
+    timeoutValue = nt->nt_nodeAge;
+
+    ni->ni_tstamp = A_GET_MS (timeoutValue);
+
+    IEEE80211_NODE_LOCK_BH(nt);
+
+    /* Insert at the end of the node list */
+    ni->ni_list_next = NULL;
+    ni->ni_list_prev = nt->nt_node_last;
+    if(nt->nt_node_last != NULL)
+    {
+        nt->nt_node_last->ni_list_next = ni;
+    }
+    nt->nt_node_last = ni;
+    if(nt->nt_node_first == NULL)
+    {
+        nt->nt_node_first = ni;
+    }
+
+    /* Insert into the hash list i.e. the bucket */
+    if((ni->ni_hash_next = nt->nt_hash[hash]) != NULL)
+    {
+        nt->nt_hash[hash]->ni_hash_prev = ni;
+    }
+    ni->ni_hash_prev = NULL;
+    nt->nt_hash[hash] = ni;
+
+    if (!nt->isTimerArmed) {
+        A_TIMEOUT_MS(&nt->nt_inact_timer, timeoutValue, 0);
+        nt->isTimerArmed = TRUE;
+    }
+
+    IEEE80211_NODE_UNLOCK_BH(nt);
+}
+
+static bss_t *
+_ieee80211_find_node(struct ieee80211_node_table *nt,
+    const A_UINT8 *macaddr)
+{
+    bss_t *ni;
+    int hash;
+
+    IEEE80211_NODE_LOCK_ASSERT(nt);
+
+    hash = IEEE80211_NODE_HASH(macaddr);
+    for(ni = nt->nt_hash[hash]; ni; ni = ni->ni_hash_next) {
+        if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
+            ieee80211_node_incref(ni);  /* mark referenced */
+            return ni;
+        }
+    }
+    return NULL;
+}
+
+bss_t *
+wlan_find_node(struct ieee80211_node_table *nt, const A_UINT8 *macaddr)
+{
+    bss_t *ni;
+
+    IEEE80211_NODE_LOCK(nt);
+    ni = _ieee80211_find_node(nt, macaddr);
+    IEEE80211_NODE_UNLOCK(nt);
+    return ni;
+}
+
+/*
+ * Reclaim a node.  If this is the last reference count then
+ * do the normal free work.  Otherwise remove it from the node
+ * table and mark it gone by clearing the back-reference.
+ */
+void
+wlan_node_reclaim(struct ieee80211_node_table *nt, bss_t *ni)
+{
+    IEEE80211_NODE_LOCK(nt);
+
+    if(ni->ni_list_prev == NULL)
+    {
+        /* First in list so fix the list head */
+        nt->nt_node_first = ni->ni_list_next;
+    }
+    else
+    {
+        ni->ni_list_prev->ni_list_next = ni->ni_list_next;
+    }
+
+    if(ni->ni_list_next == NULL)
+    {
+        /* Last in list so fix list tail */
+        nt->nt_node_last = ni->ni_list_prev;
+    }
+    else
+    {
+        ni->ni_list_next->ni_list_prev = ni->ni_list_prev;
+    }
+
+    if(ni->ni_hash_prev == NULL)
+    {
+        /* First in list so fix the list head */
+        int hash;
+        hash = IEEE80211_NODE_HASH(ni->ni_macaddr);
+        nt->nt_hash[hash] = ni->ni_hash_next;
+    }
+    else
+    {
+        ni->ni_hash_prev->ni_hash_next = ni->ni_hash_next;
+    }
+
+    if(ni->ni_hash_next != NULL)
+    {
+        ni->ni_hash_next->ni_hash_prev = ni->ni_hash_prev;
+    }
+    wlan_node_free(ni);
+
+    IEEE80211_NODE_UNLOCK(nt);
+}
+
+static void
+wlan_node_dec_free(bss_t *ni)
+{
+    if (ieee80211_node_dectestref(ni)) {
+        wlan_node_free(ni);
+    }
+}
+
+void
+wlan_free_allnodes(struct ieee80211_node_table *nt)
+{
+    bss_t *ni;
+
+    while ((ni = nt->nt_node_first) != NULL) {
+        wlan_node_reclaim(nt, ni);
+    }
+}
+
+void
+wlan_iterate_nodes(struct ieee80211_node_table *nt, wlan_node_iter_func *f,
+                   void *arg)
+{
+    bss_t *ni;
+    A_UINT32 gen;
+
+    gen = ++nt->nt_scangen;
+
+    IEEE80211_NODE_LOCK(nt);
+    for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
+        if (ni->ni_scangen != gen) {
+            ni->ni_scangen = gen;
+            (void) ieee80211_node_incref(ni);
+            (*f)(arg, ni);
+            wlan_node_dec_free(ni);
+        }
+    }
+    IEEE80211_NODE_UNLOCK(nt);
+}
+
+/*
+ * Node table support.
+ */
+void
+wlan_node_table_init(void *wmip, struct ieee80211_node_table *nt)
+{
+    int i;
+
+    AR_DEBUG_PRINTF(ATH_DEBUG_WLAN, ("node table = 0x%x\n", (A_UINT32)nt));
+    IEEE80211_NODE_LOCK_INIT(nt);
+
+    A_REGISTER_MODULE_DEBUG_INFO(wlan);
+    
+    nt->nt_node_first = nt->nt_node_last = NULL;
+    for(i = 0; i < IEEE80211_NODE_HASHSIZE; i++)
+    {
+        nt->nt_hash[i] = NULL;
+    }
+
+    A_INIT_TIMER(&nt->nt_inact_timer, wlan_node_timeout, nt);
+    nt->isTimerArmed = FALSE;
+    nt->nt_wmip = wmip;
+    nt->nt_nodeAge = WLAN_NODE_INACT_TIMEOUT_MSEC;
+
+    //
+    // nt_scangen never initialized before and during suspend/resume of winmobile, 
+    // that some junk has been stored in this, due to this scan list didn't properly updated
+    //
+    nt->nt_scangen   = 0;
+
+#ifdef OS_ROAM_MANAGEMENT
+    nt->nt_si_gen    = 0;
+#endif
+}
+
+void
+wlan_set_nodeage(struct ieee80211_node_table *nt, A_UINT32 nodeAge)
+{
+    nt->nt_nodeAge = nodeAge;
+    return;
+}
+static void
+wlan_node_timeout (A_ATH_TIMER arg)
+{
+    struct ieee80211_node_table *nt = (struct ieee80211_node_table *)arg;
+    bss_t *bss, *nextBss;
+    A_UINT8 myBssid[IEEE80211_ADDR_LEN], reArmTimer = FALSE;
+    A_UINT32 timeoutValue = 0;
+
+    timeoutValue = nt->nt_nodeAge;
+
+    wmi_get_current_bssid(nt->nt_wmip, myBssid);
+
+    bss = nt->nt_node_first;
+    while (bss != NULL)
+    {
+        nextBss = bss->ni_list_next;
+        if (A_MEMCMP(myBssid, bss->ni_macaddr, sizeof(myBssid)) != 0)
+        {
+
+            if (bss->ni_tstamp <= A_GET_MS(0))
+            {
+               /*
+                * free up all but the current bss - if set
+                */
+                wlan_node_reclaim(nt, bss);
+            }
+            else
+            {
+                /*
+                 * Re-arm timer, only when we have a bss other than
+                 * current bss AND it is not aged-out.
+                 */
+                reArmTimer = TRUE;
+            }
+        }
+        bss = nextBss;
+    }
+
+    if (reArmTimer)
+        A_TIMEOUT_MS (&nt->nt_inact_timer, timeoutValue, 0);
+
+    nt->isTimerArmed = reArmTimer;
+}
+
+void
+wlan_node_table_cleanup(struct ieee80211_node_table *nt)
+{
+    A_UNTIMEOUT(&nt->nt_inact_timer);
+    A_DELETE_TIMER(&nt->nt_inact_timer);
+    wlan_free_allnodes(nt);
+    IEEE80211_NODE_LOCK_DESTROY(nt);
+}
+
+bss_t *
+wlan_find_Ssidnode (struct ieee80211_node_table *nt, A_UCHAR *pSsid,
+                    A_UINT32 ssidLength, A_BOOL bIsWPA2, A_BOOL bMatchSSID)
+{
+    bss_t   *ni = NULL;
+    A_UCHAR *pIESsid = NULL;
+
+    IEEE80211_NODE_LOCK (nt);
+
+    for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
+        pIESsid = ni->ni_cie.ie_ssid;
+        if (pIESsid[1] <= 32) {
+
+            // Step 1 : Check SSID
+            if (0x00 == memcmp (pSsid, &pIESsid[2], ssidLength)) {
+
+                //
+                // Step 2.1 : Check MatchSSID is TRUE, if so, return Matched SSID
+                // Profile, otherwise check whether WPA2 or WPA
+                //
+                if (TRUE == bMatchSSID) {
+                    ieee80211_node_incref (ni);  /* mark referenced */
+                    IEEE80211_NODE_UNLOCK (nt);
+                    return ni;
+                }
+
+                // Step 2 : if SSID matches, check WPA or WPA2
+                if (TRUE == bIsWPA2 && NULL != ni->ni_cie.ie_rsn) {
+                    ieee80211_node_incref (ni);  /* mark referenced */
+                    IEEE80211_NODE_UNLOCK (nt);
+                    return ni;
+                }
+                if (FALSE == bIsWPA2 && NULL != ni->ni_cie.ie_wpa) {
+                    ieee80211_node_incref(ni);  /* mark referenced */
+                    IEEE80211_NODE_UNLOCK (nt);
+                    return ni;
+                }
+            }
+        }
+    }
+
+    IEEE80211_NODE_UNLOCK (nt);
+
+    return NULL;
+}
+
+void
+wlan_node_return (struct ieee80211_node_table *nt, bss_t *ni)
+{
+    IEEE80211_NODE_LOCK (nt);
+    wlan_node_dec_free (ni);
+    IEEE80211_NODE_UNLOCK (nt);
+}
+
+void
+wlan_node_remove_core (struct ieee80211_node_table *nt, bss_t *ni)
+{
+    if(ni->ni_list_prev == NULL)
+    {
+        /* First in list so fix the list head */
+        nt->nt_node_first = ni->ni_list_next;
+    }
+    else
+    {
+        ni->ni_list_prev->ni_list_next = ni->ni_list_next;
+    }
+
+    if(ni->ni_list_next == NULL)
+    {
+        /* Last in list so fix list tail */
+        nt->nt_node_last = ni->ni_list_prev;
+    }
+    else
+    {
+        ni->ni_list_next->ni_list_prev = ni->ni_list_prev;
+    }
+
+    if(ni->ni_hash_prev == NULL)
+    {
+        /* First in list so fix the list head */
+        int hash;
+        hash = IEEE80211_NODE_HASH(ni->ni_macaddr);
+        nt->nt_hash[hash] = ni->ni_hash_next;
+    }
+    else
+    {
+        ni->ni_hash_prev->ni_hash_next = ni->ni_hash_next;
+    }
+
+    if(ni->ni_hash_next != NULL)
+    {
+        ni->ni_hash_next->ni_hash_prev = ni->ni_hash_prev;
+    }
+}
+
+bss_t *
+wlan_node_remove(struct ieee80211_node_table *nt, A_UINT8 *bssid)
+{
+    bss_t *bss, *nextBss;
+
+    IEEE80211_NODE_LOCK(nt);
+
+    bss = nt->nt_node_first;
+
+    while (bss != NULL)
+    {
+        nextBss = bss->ni_list_next;
+
+        if (A_MEMCMP(bssid, bss->ni_macaddr, 6) == 0)
+        {
+            wlan_node_remove_core (nt, bss);
+            IEEE80211_NODE_UNLOCK(nt);
+            return bss;
+        }
+
+        bss = nextBss;
+    }
+
+    IEEE80211_NODE_UNLOCK(nt);
+    return NULL;
+}