Return-path: Received: from emh04.mail.saunalahti.fi ([62.142.5.110]:36541 "EHLO emh04.mail.saunalahti.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755008Ab1GMBgB (ORCPT ); Tue, 12 Jul 2011 21:36:01 -0400 Subject: [PATCH 18/24] ath6kl: add node.c To: linux-wireless@vger.kernel.org From: Kalle Valo Cc: devel@linuxdriverproject.org, gregkh@suse.de, error27@gmail.com Date: Wed, 13 Jul 2011 04:35:55 +0300 Message-ID: <20110713013555.8517.42243.stgit@localhost6.localdomain6> (sfid-20110713_033606_627691_CF59EEC3) In-Reply-To: <20110713013023.8517.15940.stgit@localhost6.localdomain6> References: <20110713013023.8517.15940.stgit@localhost6.localdomain6> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-wireless-owner@vger.kernel.org List-ID: Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/node.c | 239 ++++++++++++++++++++++++++++++++ 1 files changed, 239 insertions(+), 0 deletions(-) create mode 100644 drivers/net/wireless/ath/ath6kl/node.c diff --git a/drivers/net/wireless/ath/ath6kl/node.c b/drivers/net/wireless/ath/ath6kl/node.c new file mode 100644 index 0000000..6a1a997 --- /dev/null +++ b/drivers/net/wireless/ath/ath6kl/node.c @@ -0,0 +1,239 @@ +/* + * Copyright (c) 2004-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "htc.h" +#include "ieee80211.h" +#include "wmi.h" +#include "debug.h" + +struct bss *wlan_node_alloc(int wh_size) +{ + struct bss *ni; + + ni = kzalloc(sizeof(struct bss), GFP_ATOMIC); + + if ((ni != NULL) && wh_size) { + ni->ni_buf = kmalloc(wh_size, GFP_ATOMIC); + if (ni->ni_buf == NULL) { + kfree(ni); + return NULL; + } + } + + return ni; +} + +void wlan_node_free(struct bss *ni) +{ + kfree(ni->ni_buf); + kfree(ni); +} + +void wlan_setup_node(struct ieee80211_node_table *nt, struct bss *ni, + const u8 *mac_addr) +{ + int hash; + + memcpy(ni->ni_macaddr, mac_addr, ETH_ALEN); + hash = IEEE80211_NODE_HASH(mac_addr); + ni->ni_refcnt = 1; + + ni->ni_tstamp = jiffies_to_msecs(jiffies); + ni->ni_actcnt = WLAN_NODE_INACT_CNT; + + spin_lock_bh(&nt->nt_nodelock); + + /* 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 */ + ni->ni_hash_next = nt->nt_hash[hash]; + if (ni->ni_hash_next != NULL) + nt->nt_hash[hash]->ni_hash_prev = ni; + + ni->ni_hash_prev = NULL; + nt->nt_hash[hash] = ni; + + spin_unlock_bh(&nt->nt_nodelock); +} + +struct bss *wlan_find_node(struct ieee80211_node_table *nt, + const u8 *mac_addr) +{ + struct bss *ni, *found_ni = NULL; + int hash; + + spin_lock_bh(&nt->nt_nodelock); + + hash = IEEE80211_NODE_HASH(mac_addr); + for (ni = nt->nt_hash[hash]; ni; ni = ni->ni_hash_next) { + if (memcmp(ni->ni_macaddr, mac_addr, ETH_ALEN) == 0) { + ni->ni_refcnt++; + found_ni = ni; + break; + } + } + + spin_unlock_bh(&nt->nt_nodelock); + + return found_ni; +} + +void wlan_node_reclaim(struct ieee80211_node_table *nt, struct bss *ni) +{ + int hash; + + spin_lock_bh(&nt->nt_nodelock); + + if (ni->ni_list_prev == NULL) + /* fix 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) + /* 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 */ + 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); + + spin_unlock_bh(&nt->nt_nodelock); +} + +static void wlan_node_dec_free(struct bss *ni) +{ + if ((ni->ni_refcnt--) == 1) + wlan_node_free(ni); +} + +void wlan_free_allnodes(struct ieee80211_node_table *nt) +{ + struct bss *ni; + + while ((ni = nt->nt_node_first) != NULL) + wlan_node_reclaim(nt, ni); +} + +void wlan_iterate_nodes(struct ieee80211_node_table *nt, + void (*f) (void *arg, struct bss *), void *arg) +{ + struct bss *ni; + + spin_lock_bh(&nt->nt_nodelock); + for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) { + ni->ni_refcnt++; + (*f) (arg, ni); + wlan_node_dec_free(ni); + } + spin_unlock_bh(&nt->nt_nodelock); +} + +void wlan_node_table_init(void *wmi, struct ieee80211_node_table *nt) +{ + ath6kl_dbg(ATH6KL_DBG_WLAN_NODE, "node table = 0x%lx\n", + (unsigned long)nt); + + memset(nt, 0, sizeof(struct ieee80211_node_table)); + + spin_lock_init(&nt->nt_nodelock); + + nt->nt_wmi = wmi; + nt->nt_node_age = WLAN_NODE_INACT_TIMEOUT_MSEC; +} + +void wlan_refresh_inactive_nodes(struct ieee80211_node_table *nt) +{ + struct bss *bss; + u8 my_bssid[ETH_ALEN]; + u32 now; + + wmi_get_current_bssid(nt->nt_wmi, my_bssid); + + now = jiffies_to_msecs(jiffies); + bss = nt->nt_node_first; + while (bss != NULL) { + /* refresh all nodes except the current bss */ + if (memcmp(my_bssid, bss->ni_macaddr, sizeof(my_bssid)) != 0) { + if (((now - bss->ni_tstamp) > nt->nt_node_age) + || --bss->ni_actcnt == 0) { + wlan_node_reclaim(nt, bss); + } + } + bss = bss->ni_list_next; + } +} + +void wlan_node_table_cleanup(struct ieee80211_node_table *nt) +{ + wlan_free_allnodes(nt); +} + +struct bss *wlan_find_ssid_node(struct ieee80211_node_table *nt, u8 * ssid, + u32 ssid_len, bool is_wpa2, bool match_ssid) +{ + struct bss *ni, *found_ni = NULL; + u8 *ie_ssid; + + spin_lock_bh(&nt->nt_nodelock); + + for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) { + + ie_ssid = ni->ni_cie.ie_ssid; + + if ((ie_ssid[1] <= IEEE80211_MAX_SSID_LEN) && + (memcmp(ssid, &ie_ssid[2], ssid_len) == 0)) { + + if (match_ssid || + (is_wpa2 && ni->ni_cie.ie_rsn != NULL) || + (!is_wpa2 && ni->ni_cie.ie_wpa != NULL)) { + ni->ni_refcnt++; + found_ni = ni; + break; + } + } + } + + spin_unlock_bh(&nt->nt_nodelock); + + return found_ni; +} + +void wlan_node_return(struct ieee80211_node_table *nt, struct bss *ni) +{ + spin_lock_bh(&nt->nt_nodelock); + wlan_node_dec_free(ni); + spin_unlock_bh(&nt->nt_nodelock); +}