Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath6kl/main.c | 1337 ++++++++++++++++++++++++++++++++
1 files changed, 1337 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/wireless/ath/ath6kl/main.c
diff --git a/drivers/net/wireless/ath/ath6kl/main.c b/drivers/net/wireless/ath/ath6kl/main.c
new file mode 100644
index 0000000..27e21e2
--- /dev/null
+++ b/drivers/net/wireless/ath/ath6kl/main.c
@@ -0,0 +1,1337 @@
+/*
+ * 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 "core.h"
+#include "hif-ops.h"
+#include "cfg80211.h"
+#include "target.h"
+#include "debug.h"
+
+struct ath6kl_sta *ath6kl_find_sta(struct ath6kl *ar, u8 *node_addr)
+{
+ struct ath6kl_sta *conn = NULL;
+ u8 i, max_conn;
+
+ max_conn = (ar->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
+
+ for (i = 0; i < max_conn; i++) {
+ if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
+ conn = &ar->sta_list[i];
+ break;
+ }
+ }
+
+ return conn;
+}
+
+struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
+{
+ struct ath6kl_sta *conn = NULL;
+ u8 ctr;
+
+ for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
+ if (ar->sta_list[ctr].aid == aid) {
+ conn = &ar->sta_list[ctr];
+ break;
+ }
+ }
+ return conn;
+}
+
+static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie,
+ u8 ielen, u8 keymgmt, u8 ucipher, u8 auth)
+{
+ u8 free_slot;
+
+ free_slot = aid - 1;
+ memcpy(ar->sta_list[free_slot].mac, mac, ETH_ALEN);
+ memcpy(ar->sta_list[free_slot].wpa_ie, wpaie, ielen);
+ ar->sta_list[free_slot].aid = aid;
+ ar->sta_list[free_slot].keymgmt = keymgmt;
+ ar->sta_list[free_slot].ucipher = ucipher;
+ ar->sta_list[free_slot].auth = auth;
+ ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
+ ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
+}
+
+static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
+{
+ /* empty the queued pkts in the PS queue if any */
+ spin_lock_bh(&ar->sta_list[i].psq_lock);
+ skb_queue_purge(&ar->sta_list[i].psq);
+ spin_unlock_bh(&ar->sta_list[i].psq_lock);
+
+ memset(&ar->ap_stats.sta[ar->sta_list[i].aid - 1], 0,
+ sizeof(struct wmi_per_sta_stat));
+ memset(&ar->sta_list[i].mac, 0, ETH_ALEN);
+ memset(&ar->sta_list[i].wpa_ie, 0, IEEE80211_MAX_IE);
+ ar->sta_list[i].aid = 0;
+ ar->sta_list[i].sta_flags = 0;
+
+ ar->sta_list_index = ar->sta_list_index & ~(1 << i);
+
+}
+
+static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
+{
+ u8 i, removed = 0;
+
+ if (is_zero_ether_addr(mac))
+ return removed;
+
+ if (is_broadcast_ether_addr(mac)) {
+ ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
+
+ for (i = 0; i < AP_MAX_NUM_STA; i++) {
+ if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
+ ath6kl_sta_cleanup(ar, i);
+ removed = 1;
+ }
+ }
+ } else {
+ for (i = 0; i < AP_MAX_NUM_STA; i++) {
+ if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
+ ath6kl_dbg(ATH6KL_DBG_TRC, "deleting station "
+ "%pM aid=%d reason=%d\n", mac,
+ ar->sta_list[i].aid, reason);
+ ath6kl_sta_cleanup(ar, i);
+ removed = 1;
+ break;
+ }
+ }
+ }
+
+ return removed;
+}
+
+enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
+{
+ struct ath6kl *ar = devt;
+ return ar->ac2ep_map[ac];
+}
+
+struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
+{
+ struct ath6kl_cookie *cookie;
+
+ cookie = ar->cookie_list;
+ if (cookie != NULL) {
+ ar->cookie_list = cookie->arc_list_next;
+ ar->cookie_count--;
+ }
+
+ return cookie;
+}
+
+void ath6kl_cookie_init(struct ath6kl *ar)
+{
+ u32 i;
+
+ ar->cookie_list = NULL;
+ ar->cookie_count = 0;
+
+ memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
+
+ for (i = 0; i < MAX_COOKIE_NUM; i++)
+ ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
+}
+
+void ath6kl_cookie_cleanup(struct ath6kl *ar)
+{
+ ar->cookie_list = NULL;
+ ar->cookie_count = 0;
+}
+
+void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
+{
+ /* Insert first */
+
+ if (!ar || !cookie)
+ return;
+
+ cookie->arc_list_next = ar->cookie_list;
+ ar->cookie_list = cookie;
+ ar->cookie_count++;
+}
+
+/* set the window address register (using 4-byte register access ). */
+static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
+{
+ int status;
+ u8 addr_val[4];
+ s32 i;
+
+ /*
+ * Write bytes 1,2,3 of the register to set the upper address bytes,
+ * the LSB is written last to initiate the access cycle
+ */
+
+ for (i = 1; i <= 3; i++) {
+ /*
+ * Fill the buffer with the address byte value we want to
+ * hit 4 times.
+ */
+ memset(addr_val, ((u8 *)&addr)[i], 4);
+
+ /*
+ * Hit each byte of the register address with a 4-byte
+ * write operation to the same address, this is a harmless
+ * operation.
+ */
+ status = hif_read_write_sync(ar, reg_addr + i, addr_val,
+ 4, HIF_WR_SYNC_BYTE_FIX);
+ if (status)
+ break;
+ }
+
+ if (status) {
+ ath6kl_err("%s: failed to write initial bytes of 0x%x "
+ "to window reg: 0x%X\n", __func__,
+ addr, reg_addr);
+ return status;
+ }
+
+ /*
+ * Write the address register again, this time write the whole
+ * 4-byte value. The effect here is that the LSB write causes the
+ * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
+ * effect since we are writing the same values again
+ */
+ status = hif_read_write_sync(ar, reg_addr, (u8 *)(&addr),
+ 4, HIF_WR_SYNC_BYTE_INC);
+
+ if (status) {
+ ath6kl_err("%s: failed to write 0x%x to window reg: 0x%X\n",
+ __func__, addr, reg_addr);
+ return status;
+ }
+
+ return 0;
+}
+
+/*
+ * Read from the ATH6KL through its diagnostic window. No cooperation from
+ * the Target is required for this.
+ */
+int ath6kl_read_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
+{
+ int status;
+
+ /* set window register to start read cycle */
+ status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS,
+ *address);
+
+ if (status)
+ return status;
+
+ /* read the data */
+ status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
+ sizeof(u32), HIF_RD_SYNC_BYTE_INC);
+ if (status) {
+ ath6kl_err("%s: failed to read from window data addr\n",
+ __func__);
+ return status;
+ }
+
+ return status;
+}
+
+
+/*
+ * Write to the ATH6KL through its diagnostic window. No cooperation from
+ * the Target is required for this.
+ */
+static int ath6kl_write_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
+{
+ int status;
+
+ /* set write data */
+ status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
+ sizeof(u32), HIF_WR_SYNC_BYTE_INC);
+ if (status) {
+ ath6kl_err("%s: failed to write 0x%x to window data addr\n",
+ __func__, *data);
+ return status;
+ }
+
+ /* set window register, which starts the write cycle */
+ return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
+ *address);
+}
+
+int ath6kl_access_datadiag(struct ath6kl *ar, u32 address,
+ u8 *data, u32 length, bool read)
+{
+ u32 count;
+ int status = 0;
+
+ for (count = 0; count < length; count += 4, address += 4) {
+ if (read) {
+ status = ath6kl_read_reg_diag(ar, &address,
+ (u32 *) &data[count]);
+ if (status)
+ break;
+ } else {
+ status = ath6kl_write_reg_diag(ar, &address,
+ (u32 *) &data[count]);
+ if (status)
+ break;
+ }
+ }
+
+ return status;
+}
+
+static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
+ bool wait_fot_compltn, bool cold_reset)
+{
+ int status = 0;
+ u32 address;
+ u32 data;
+
+ if (target_type != TARGET_TYPE_AR6003)
+ return;
+
+ data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST;
+
+ address = RTC_BASE_ADDRESS;
+ status = ath6kl_write_reg_diag(ar, &address, &data);
+
+ if (status)
+ ath6kl_err("%s: failed to reset target\n", __func__);
+}
+
+void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile,
+ bool get_dbglogs)
+{
+ struct ath6kl *ar = ath6kl_priv(dev);
+ static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ bool discon_issued;
+
+ netif_stop_queue(dev);
+
+ /* disable the target and the interrupts associated with it */
+ if (test_bit(WMI_READY, &ar->flag)) {
+ discon_issued = (test_bit(CONNECTED, &ar->flag) ||
+ test_bit(CONNECT_PEND, &ar->flag));
+ ath6kl_disconnect(ar);
+ if (!keep_profile)
+ ath6kl_init_profile_info(ar);
+
+ del_timer(&ar->disconnect_timer);
+
+ clear_bit(WMI_READY, &ar->flag);
+ wmi_shutdown(ar->wmi);
+ clear_bit(WMI_ENABLED, &ar->flag);
+ ar->wmi = NULL;
+
+ /*
+ * After wmi_shudown all WMI events will be dropped. We
+ * need to cleanup the buffers allocated in AP mode and
+ * give disconnect notification to stack, which usually
+ * happens in the disconnect_event. Simulate the disconnect
+ * event by calling the function directly. Sometimes
+ * disconnect_event will be received when the debug logs
+ * are collected.
+ */
+ if (discon_issued)
+ ath6kl_disconnect_event(ar, DISCONNECT_CMD,
+ (ar->nw_type & AP_NETWORK) ?
+ bcast_mac : ar->bssid,
+ 0, NULL, 0);
+
+ ar->user_key_ctrl = 0;
+
+ } else {
+ ath6kl_dbg(ATH6KL_DBG_TRC,
+ "%s: wmi is not ready 0x%lx 0x%lx\n",
+ __func__, (unsigned long) ar,
+ (unsigned long) ar->wmi);
+
+ /* Shut down WMI if we have started it */
+ if (test_bit(WMI_ENABLED, &ar->flag)) {
+ ath6kl_dbg(ATH6KL_DBG_TRC,
+ "%s: shut down wmi\n", __func__);
+ wmi_shutdown(ar->wmi);
+ clear_bit(WMI_ENABLED, &ar->flag);
+ ar->wmi = NULL;
+ }
+ }
+
+ if (ar->htc_target) {
+ ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
+ htc_stop(ar->htc_target);
+ }
+
+ /*
+ * Try to reset the device if we can. The driver may have been
+ * configure NOT to reset the target during a debug session.
+ */
+ ath6kl_dbg(ATH6KL_DBG_TRC,
+ "attempting to reset target on instance destroy\n");
+ ath6kl_reset_device(ar, ar->target_type, true, true);
+}
+
+static void ath6kl_install_static_wep_keys(struct ath6kl *ar)
+{
+ u8 index;
+ u8 keyusage;
+
+ for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
+ if (ar->wep_key_list[index].key_len) {
+ keyusage = GROUP_USAGE;
+ if (index == ar->def_txkey_index)
+ keyusage |= TX_USAGE;
+
+ wmi_addkey_cmd(ar->wmi,
+ index,
+ WEP_CRYPT,
+ keyusage,
+ ar->wep_key_list[index].key_len,
+ NULL,
+ ar->wep_key_list[index].key,
+ KEY_OP_INIT_VAL, NULL,
+ NO_SYNC_WMIFLAG);
+ }
+ }
+}
+
+static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid,
+ u16 listen_int, u16 beacon_int,
+ u8 assoc_resp_len, u8 *assoc_info)
+{
+ struct net_device *dev = ar->net_dev;
+ struct station_info sinfo;
+ struct ieee80211req_key *ik;
+ enum crypto_type keyType = NONE_CRYPT;
+
+ if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) {
+ ik = &ar->ap_mode_bkey;
+
+ switch (ar->auth_mode) {
+ case NONE_AUTH:
+ if (ar->prwise_crypto == WEP_CRYPT)
+ ath6kl_install_static_wep_keys(ar);
+ break;
+ case WPA_PSK_AUTH:
+ case WPA2_PSK_AUTH:
+ case (WPA_PSK_AUTH|WPA2_PSK_AUTH):
+ switch (ik->ik_type) {
+ case IEEE80211_CIPHER_TKIP:
+ keyType = TKIP_CRYPT;
+ break;
+ case IEEE80211_CIPHER_AES_CCM:
+ keyType = AES_CRYPT;
+ break;
+ default:
+ goto skip_key;
+ }
+ wmi_addkey_cmd(ar->wmi, ik->ik_keyix, keyType,
+ GROUP_USAGE, ik->ik_keylen,
+ (u8 *)&ik->ik_keyrsc, ik->ik_keydata,
+ KEY_OP_INIT_VAL, ik->ik_macaddr,
+ SYNC_BOTH_WMIFLAG);
+ break;
+ }
+skip_key:
+ set_bit(CONNECTED, &ar->flag);
+ return;
+ }
+
+ ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n",
+ bssid, channel);
+
+ ath6kl_add_new_sta(ar, bssid, channel, assoc_info, assoc_resp_len,
+ listen_int & 0xFF, beacon_int,
+ (listen_int >> 8) & 0xFF);
+
+ /* send event to application */
+ memset(&sinfo, 0, sizeof(sinfo));
+
+ /* TODO: sinfo.generation */
+ /* TODO: need to deliver (Re)AssocReq IEs somehow.. change in
+ * cfg80211 needed, e.g., by adding those into sinfo
+ */
+ cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL);
+
+ netif_wake_queue(ar->net_dev);
+
+ return;
+}
+
+/* Functions for Tx credit handling */
+void ath6k_credit_init(struct htc_credit_state_info *cred_info,
+ struct list_head *ep_list,
+ int tot_credits)
+{
+ struct htc_endpoint_credit_dist *cur_ep_dist;
+ int count;
+
+ cred_info->cur_free_credits = tot_credits;
+ cred_info->total_avail_credits = tot_credits;
+
+ list_for_each_entry(cur_ep_dist, ep_list, list) {
+ if (cur_ep_dist->endpoint == ENDPOINT_0)
+ continue;
+
+ cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
+
+ if (tot_credits > 4)
+ if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
+ (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
+ ath6kl_deposit_credit_to_ep(cred_info,
+ cur_ep_dist,
+ cur_ep_dist->cred_min);
+ cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
+ }
+
+ if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
+ ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
+ cur_ep_dist->cred_min);
+ /*
+ * Control service is always marked active, it
+ * never goes inactive EVER.
+ */
+ cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
+ } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
+ /* this is the lowest priority data endpoint */
+ cred_info->lowestpri_ep_dist = cur_ep_dist->list;
+
+ /*
+ * Streams have to be created (explicit | implicit) for all
+ * kinds of traffic. BE endpoints are also inactive in the
+ * beginning. When BE traffic starts it creates implicit
+ * streams that redistributes credits.
+ *
+ * Note: all other endpoints have minimums set but are
+ * initially given NO credits. credits will be distributed
+ * as traffic activity demands
+ */
+ }
+
+ WARN_ON(cred_info->cur_free_credits <= 0);
+
+ list_for_each_entry(cur_ep_dist, ep_list, list) {
+ if (cur_ep_dist->endpoint == ENDPOINT_0)
+ continue;
+
+ if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
+ cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
+ else {
+ /*
+ * For the remaining data endpoints, we assume that
+ * each cred_per_msg are the same. We use a simple
+ * calculation here, we take the remaining credits
+ * and determine how many max messages this can
+ * cover and then set each endpoint's normal value
+ * equal to 3/4 this amount.
+ */
+ count = (cred_info->cur_free_credits /
+ cur_ep_dist->cred_per_msg)
+ * cur_ep_dist->cred_per_msg;
+ count = (count * 3) >> 2;
+ count = max(count, cur_ep_dist->cred_per_msg);
+ cur_ep_dist->cred_norm = count;
+
+ }
+ }
+}
+
+/* initialize and setup credit distribution */
+int ath6k_setup_credit_dist(void *htc_handle,
+ struct htc_credit_state_info *cred_info)
+{
+ u16 servicepriority[5];
+
+ memset(cred_info, 0, sizeof(struct htc_credit_state_info));
+
+ servicepriority[0] = WMI_CONTROL_SVC; /* highest */
+ servicepriority[1] = WMI_DATA_VO_SVC;
+ servicepriority[2] = WMI_DATA_VI_SVC;
+ servicepriority[3] = WMI_DATA_BE_SVC;
+ servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
+
+ /* set priority list */
+ htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
+
+ return 0;
+}
+
+/* reduce an ep's credits back to a set limit */
+static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
+ struct htc_endpoint_credit_dist *ep_dist,
+ int limit)
+{
+ int credits;
+
+ ep_dist->cred_assngd = limit;
+
+ if (ep_dist->credits <= limit)
+ return;
+
+ credits = ep_dist->credits - limit;
+ ep_dist->credits -= credits;
+ cred_info->cur_free_credits += credits;
+}
+
+static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
+ struct list_head *epdist_list)
+{
+ struct htc_endpoint_credit_dist *cur_dist_list;
+
+ list_for_each_entry(cur_dist_list, epdist_list, list) {
+ if (cur_dist_list->endpoint == ENDPOINT_0)
+ continue;
+
+ if (cur_dist_list->cred_to_dist > 0) {
+ cur_dist_list->credits +=
+ cur_dist_list->cred_to_dist;
+ cur_dist_list->cred_to_dist = 0;
+ if (cur_dist_list->credits >
+ cur_dist_list->cred_assngd)
+ ath6k_reduce_credits(cred_info,
+ cur_dist_list,
+ cur_dist_list->cred_assngd);
+
+ if (cur_dist_list->credits >
+ cur_dist_list->cred_norm)
+ ath6k_reduce_credits(cred_info, cur_dist_list,
+ cur_dist_list->cred_norm);
+
+ if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
+ if (cur_dist_list->txq_depth == 0)
+ ath6k_reduce_credits(cred_info,
+ cur_dist_list, 0);
+ }
+ }
+ }
+}
+
+/*
+ * HTC has an endpoint that needs credits, ep_dist is the endpoint in
+ * question.
+ */
+void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
+ struct htc_endpoint_credit_dist *ep_dist)
+{
+ struct htc_endpoint_credit_dist *curdist_list;
+ int credits = 0;
+ int need;
+
+ if (ep_dist->svc_id == WMI_CONTROL_SVC)
+ goto out;
+
+ if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
+ (ep_dist->svc_id == WMI_DATA_VO_SVC))
+ if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
+ goto out;
+
+ /*
+ * For all other services, we follow a simple algorithm of:
+ *
+ * 1. checking the free pool for credits
+ * 2. checking lower priority endpoints for credits to take
+ */
+
+ credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
+
+ if (credits >= ep_dist->seek_cred)
+ goto out;
+
+ /*
+ * We don't have enough in the free pool, try taking away from
+ * lower priority services The rule for taking away credits:
+ *
+ * 1. Only take from lower priority endpoints
+ * 2. Only take what is allocated above the minimum (never
+ * starve an endpoint completely)
+ * 3. Only take what you need.
+ */
+
+ list_for_each_entry_reverse(curdist_list,
+ &cred_info->lowestpri_ep_dist,
+ list) {
+ if (curdist_list == ep_dist)
+ break;
+
+ need = ep_dist->seek_cred - cred_info->cur_free_credits;
+
+ if ((curdist_list->cred_assngd - need) >=
+ curdist_list->cred_min) {
+ /*
+ * The current one has been allocated more than
+ * it's minimum and it has enough credits assigned
+ * above it's minimum to fulfill our need try to
+ * take away just enough to fulfill our need.
+ */
+ ath6k_reduce_credits(cred_info, curdist_list,
+ curdist_list->cred_assngd - need);
+
+ if (cred_info->cur_free_credits >=
+ ep_dist->seek_cred)
+ break;
+ }
+
+ if (curdist_list->endpoint == ENDPOINT_0)
+ break;
+ }
+
+ credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
+
+out:
+ /* did we find some credits? */
+ if (credits)
+ ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
+
+ ep_dist->seek_cred = 0;
+}
+
+/* redistribute credits based on activity change */
+static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
+ struct list_head *ep_dist_list)
+{
+ struct htc_endpoint_credit_dist *curdist_list;
+
+ list_for_each_entry(curdist_list, ep_dist_list, list) {
+ if (curdist_list->endpoint == ENDPOINT_0)
+ continue;
+
+ if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
+ (curdist_list->svc_id == WMI_DATA_BE_SVC))
+ curdist_list->dist_flags |= HTC_EP_ACTIVE;
+
+ if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
+ !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
+ if (curdist_list->txq_depth == 0)
+ ath6k_reduce_credits(info,
+ curdist_list, 0);
+ else
+ ath6k_reduce_credits(info,
+ curdist_list,
+ curdist_list->cred_min);
+ }
+ }
+}
+
+/*
+ *
+ * This function is invoked whenever endpoints require credit
+ * distributions. A lock is held while this function is invoked, this
+ * function shall NOT block. The ep_dist_list is a list of distribution
+ * structures in prioritized order as defined by the call to the
+ * htc_set_credit_dist() api.
+ */
+void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
+ struct list_head *ep_dist_list,
+ enum htc_credit_dist_reason reason)
+{
+ switch (reason) {
+ case HTC_CREDIT_DIST_SEND_COMPLETE:
+ ath6k_credit_update(cred_info, ep_dist_list);
+ break;
+ case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
+ ath6k_redistribute_credits(cred_info, ep_dist_list);
+ break;
+ default:
+ break;
+ }
+
+ WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
+ WARN_ON(cred_info->cur_free_credits < 0);
+}
+
+void disconnect_timer_handler(unsigned long ptr)
+{
+ struct net_device *dev = (struct net_device *)ptr;
+ struct ath6kl *ar = ath6kl_priv(dev);
+
+ ath6kl_init_profile_info(ar);
+ ath6kl_disconnect(ar);
+}
+
+void ath6kl_disconnect(struct ath6kl *ar)
+{
+ if (test_bit(CONNECTED, &ar->flag) ||
+ test_bit(CONNECT_PEND, &ar->flag)) {
+ wmi_disconnect_cmd(ar->wmi);
+ /*
+ * Disconnect command is issued, clear the connect pending
+ * flag. The connected flag will be cleared in
+ * disconnect event notification.
+ */
+ clear_bit(CONNECT_PEND, &ar->flag);
+ }
+}
+
+/* WMI Event handlers */
+
+static const char *get_hw_id_string(u32 id)
+{
+ switch (id) {
+ case AR6003_REV1_VERSION:
+ return "1.0";
+ case AR6003_REV2_VERSION:
+ return "2.0";
+ case AR6003_REV3_VERSION:
+ return "2.1.1";
+ default:
+ return "unknown";
+ }
+}
+
+void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
+{
+ struct ath6kl *ar = devt;
+ struct net_device *dev = ar->net_dev;
+
+ memcpy(dev->dev_addr, datap, ETH_ALEN);
+ ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
+ __func__, dev->dev_addr);
+
+ ar->version.wlan_ver = sw_ver;
+ ar->version.abi_ver = abi_ver;
+
+ snprintf(ar->wdev->wiphy->fw_version,
+ sizeof(ar->wdev->wiphy->fw_version),
+ "%u.%u.%u.%u",
+ (ar->version.wlan_ver & 0xf0000000) >> 28,
+ (ar->version.wlan_ver & 0x0f000000) >> 24,
+ (ar->version.wlan_ver & 0x00ff0000) >> 16,
+ (ar->version.wlan_ver & 0x0000ffff));
+
+ /* indicate to the waiting thread that the ready event was received */
+ set_bit(WMI_READY, &ar->flag);
+ wake_up(&ar->event_wq);
+
+ ath6kl_info("hw %s fw %s\n",
+ get_hw_id_string(ar->wdev->wiphy->hw_version),
+ ar->wdev->wiphy->fw_version);
+}
+
+void ath6kl_scan_complete_evt(struct ath6kl *ar, int status)
+{
+ ath6kl_cfg80211_scan_complete_event(ar, status);
+
+ if (!ar->usr_bss_filter)
+ wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
+
+ ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
+}
+
+void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid,
+ u16 listen_int, u16 beacon_int,
+ enum network_type net_type, u8 beacon_ie_len,
+ u8 assoc_req_len, u8 assoc_resp_len,
+ u8 *assoc_info)
+{
+ unsigned long flags;
+
+ if (ar->nw_type == AP_NETWORK) {
+ ath6kl_connect_ap_mode(ar, channel, bssid, listen_int,
+ beacon_int, assoc_resp_len,
+ assoc_info);
+ return;
+ }
+
+ ath6kl_cfg80211_connect_event(ar, channel, bssid,
+ listen_int, beacon_int,
+ net_type, beacon_ie_len,
+ assoc_req_len, assoc_resp_len,
+ assoc_info);
+
+ memcpy(ar->bssid, bssid, sizeof(ar->bssid));
+ ar->bss_ch = channel;
+
+ if ((ar->nw_type == INFRA_NETWORK))
+ wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t,
+ ar->listen_intvl_b);
+
+ netif_wake_queue(ar->net_dev);
+
+ /* Update connect & link status atomically */
+ spin_lock_irqsave(&ar->lock, flags);
+ set_bit(CONNECTED, &ar->flag);
+ clear_bit(CONNECT_PEND, &ar->flag);
+ netif_carrier_on(ar->net_dev);
+ spin_unlock_irqrestore(&ar->lock, flags);
+
+ aggr_reset_state(ar->aggr_cntxt);
+ ar->reconnect_flag = 0;
+
+ if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
+ memset(ar->node_map, 0, sizeof(ar->node_map));
+ ar->node_num = 0;
+ ar->next_ep_id = ENDPOINT_2;
+ }
+
+ if (!ar->usr_bss_filter)
+ wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
+}
+
+void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast)
+{
+ struct ath6kl_sta *sta;
+ u8 tsc[6];
+ /*
+ * For AP case, keyid will have aid of STA which sent pkt with
+ * MIC error. Use this aid to get MAC & send it to hostapd.
+ */
+ if (ar->nw_type == AP_NETWORK) {
+ sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
+ if (!sta)
+ return;
+
+ ath6kl_dbg(ATH6KL_DBG_TRC,
+ "ap tkip mic error received from aid=%d\n", keyid);
+
+ memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
+ cfg80211_michael_mic_failure(ar->net_dev, sta->mac,
+ NL80211_KEYTYPE_PAIRWISE, keyid,
+ tsc, GFP_KERNEL);
+ } else
+ ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast);
+
+}
+
+static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len)
+{
+ struct wmi_target_stats *tgt_stats =
+ (struct wmi_target_stats *) ptr;
+ struct target_stats *stats = &ar->target_stats;
+ struct tkip_ccmp_stats *ccmp_stats;
+ struct bss *conn_bss = NULL;
+ struct cserv_stats *c_stats;
+ u8 ac;
+
+ if (len < sizeof(*tgt_stats))
+ return;
+
+ /* update the RSSI of the connected bss */
+ if (test_bit(CONNECTED, &ar->flag)) {
+ conn_bss = wmi_find_node(ar->wmi, ar->bssid);
+ if (conn_bss) {
+ c_stats = &tgt_stats->cserv_stats;
+ conn_bss->ni_rssi =
+ a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi);
+ conn_bss->ni_snr =
+ tgt_stats->cserv_stats.cs_ave_beacon_snr;
+ wmi_node_return(ar->wmi, conn_bss);
+ }
+ }
+
+ ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
+
+ stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
+ stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
+ stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
+ stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
+ stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
+ stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
+ stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
+ stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
+ stats->tx_rts_success_cnt +=
+ le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
+
+ for (ac = 0; ac < WMM_NUM_AC; ac++)
+ stats->tx_pkt_per_ac[ac] +=
+ le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
+
+ stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
+ stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
+ stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
+ stats->tx_mult_retry_cnt +=
+ le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
+ stats->tx_rts_fail_cnt +=
+ le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
+ stats->tx_ucast_rate =
+ wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
+
+ stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
+ stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
+ stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
+ stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
+ stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
+ stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
+ stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
+ stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
+ stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
+ stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
+ stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
+ stats->rx_key_cache_miss +=
+ le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
+ stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
+ stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
+ stats->rx_ucast_rate =
+ wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
+
+ ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
+
+ stats->tkip_local_mic_fail +=
+ le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
+ stats->tkip_cnter_measures_invoked +=
+ le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
+ stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
+
+ stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
+ stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
+
+ stats->pwr_save_fail_cnt +=
+ le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
+ stats->noise_floor_calib =
+ a_sle32_to_cpu(tgt_stats->noise_floor_calib);
+
+ stats->cs_bmiss_cnt +=
+ le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
+ stats->cs_low_rssi_cnt +=
+ le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
+ stats->cs_connect_cnt +=
+ le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
+ stats->cs_discon_cnt +=
+ le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
+
+ stats->cs_ave_beacon_rssi =
+ a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
+
+ stats->cs_last_roam_msec =
+ tgt_stats->cserv_stats.cs_last_roam_msec;
+ stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
+ stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
+
+ stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
+
+ stats->wow_pkt_dropped +=
+ le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
+ stats->wow_host_pkt_wakeups +=
+ tgt_stats->wow_stats.wow_host_pkt_wakeups;
+ stats->wow_host_evt_wakeups +=
+ tgt_stats->wow_stats.wow_host_evt_wakeups;
+ stats->wow_evt_discarded +=
+ le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
+
+ if (test_bit(STATS_UPDATE_PEND, &ar->flag)) {
+ clear_bit(STATS_UPDATE_PEND, &ar->flag);
+ wake_up(&ar->event_wq);
+ }
+}
+
+static void ath6kl_add_le32(__le32 *var, __le32 val)
+{
+ *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
+}
+
+void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len)
+{
+ struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
+ struct wmi_ap_mode_stat *ap = &ar->ap_stats;
+ u8 ac;
+
+ if (ar->nw_type == AP_NETWORK) {
+ if (len < sizeof(*p))
+ return;
+
+ for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
+ ath6kl_add_le32(&ap->sta[ac].tx_bytes,
+ p->sta[ac].tx_bytes);
+ ath6kl_add_le32(&ap->sta[ac].tx_pkts,
+ p->sta[ac].tx_pkts);
+ ath6kl_add_le32(&ap->sta[ac].tx_error,
+ p->sta[ac].tx_error);
+ ath6kl_add_le32(&ap->sta[ac].tx_discard,
+ p->sta[ac].tx_discard);
+ ath6kl_add_le32(&ap->sta[ac].rx_bytes,
+ p->sta[ac].rx_bytes);
+ ath6kl_add_le32(&ap->sta[ac].rx_pkts,
+ p->sta[ac].rx_pkts);
+ ath6kl_add_le32(&ap->sta[ac].rx_error,
+ p->sta[ac].rx_error);
+ ath6kl_add_le32(&ap->sta[ac].rx_discard,
+ p->sta[ac].rx_discard);
+ }
+
+ } else {
+ ath6kl_update_target_stats(ar, ptr, len);
+ }
+}
+
+void ath6kl_wakeup_event(void *dev)
+{
+ struct ath6kl *ar = (struct ath6kl *) dev;
+
+ wake_up(&ar->event_wq);
+}
+
+void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
+{
+ struct ath6kl *ar = (struct ath6kl *) devt;
+
+ ar->tx_pwr = tx_pwr;
+ wake_up(&ar->event_wq);
+}
+
+void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid)
+{
+ struct ath6kl_sta *conn;
+ struct sk_buff *skb;
+ bool psq_empty = false;
+
+ conn = ath6kl_find_sta_by_aid(ar, aid);
+
+ if (!conn)
+ return;
+ /*
+ * Send out a packet queued on ps queue. When the ps queue
+ * becomes empty update the PVB for this station.
+ */
+ spin_lock_bh(&conn->psq_lock);
+ psq_empty = skb_queue_empty(&conn->psq);
+ spin_unlock_bh(&conn->psq_lock);
+
+ if (psq_empty)
+ /* TODO: Send out a NULL data frame */
+ return;
+
+ spin_lock_bh(&conn->psq_lock);
+ skb = skb_dequeue(&conn->psq);
+ spin_unlock_bh(&conn->psq_lock);
+
+ conn->sta_flags |= STA_PS_POLLED;
+ ath6kl_data_tx(skb, ar->net_dev);
+ conn->sta_flags &= ~STA_PS_POLLED;
+
+ spin_lock_bh(&conn->psq_lock);
+ psq_empty = skb_queue_empty(&conn->psq);
+ spin_unlock_bh(&conn->psq_lock);
+
+ if (psq_empty)
+ wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
+}
+
+void ath6kl_dtimexpiry_event(struct ath6kl *ar)
+{
+ bool mcastq_empty = false;
+ struct sk_buff *skb;
+
+ /*
+ * If there are no associated STAs, ignore the DTIM expiry event.
+ * There can be potential race conditions where the last associated
+ * STA may disconnect & before the host could clear the 'Indicate
+ * DTIM' request to the firmware, the firmware would have just
+ * indicated a DTIM expiry event. The race is between 'clear DTIM
+ * expiry cmd' going from the host to the firmware & the DTIM
+ * expiry event happening from the firmware to the host.
+ */
+ if (!ar->sta_list_index)
+ return;
+
+ spin_lock_bh(&ar->mcastpsq_lock);
+ mcastq_empty = skb_queue_empty(&ar->mcastpsq);
+ spin_unlock_bh(&ar->mcastpsq_lock);
+
+ if (mcastq_empty)
+ return;
+
+ /* set the STA flag to dtim_expired for the frame to go out */
+ set_bit(DTIM_EXPIRED, &ar->flag);
+
+ spin_lock_bh(&ar->mcastpsq_lock);
+ while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
+ spin_unlock_bh(&ar->mcastpsq_lock);
+
+ ath6kl_data_tx(skb, ar->net_dev);
+
+ spin_lock_bh(&ar->mcastpsq_lock);
+ }
+ spin_unlock_bh(&ar->mcastpsq_lock);
+
+ clear_bit(DTIM_EXPIRED, &ar->flag);
+
+ /* clear the LSB of the BitMapCtl field of the TIM IE */
+ wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
+}
+
+void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid,
+ u8 assoc_resp_len, u8 *assoc_info,
+ u16 prot_reason_status)
+{
+ struct bss *wmi_ssid_node = NULL;
+ unsigned long flags;
+
+ if (ar->nw_type == AP_NETWORK) {
+ if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
+ return;
+
+ /* if no more associated STAs, empty the mcast PS q */
+ if (ar->sta_list_index == 0) {
+ spin_lock_bh(&ar->mcastpsq_lock);
+ skb_queue_purge(&ar->mcastpsq);
+ spin_unlock_bh(&ar->mcastpsq_lock);
+
+ /* clear the LSB of the TIM IE's BitMapCtl field */
+ if (test_bit(WMI_READY, &ar->flag))
+ wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
+ }
+
+ if (!is_broadcast_ether_addr(bssid)) {
+ /* send event to application */
+ cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL);
+ }
+
+ clear_bit(CONNECTED, &ar->flag);
+ return;
+ }
+
+ ath6kl_cfg80211_disconnect_event(ar, reason, bssid,
+ assoc_resp_len, assoc_info,
+ prot_reason_status);
+
+ aggr_reset_state(ar->aggr_cntxt);
+
+ del_timer(&ar->disconnect_timer);
+
+ ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
+ "disconnect reason is %d\n", reason);
+
+ /*
+ * If the event is due to disconnect cmd from the host, only they
+ * the target would stop trying to connect. Under any other
+ * condition, target would keep trying to connect.
+ */
+ if (reason == DISCONNECT_CMD) {
+ if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
+ wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
+ } else {
+ set_bit(CONNECT_PEND, &ar->flag);
+ if (((reason == ASSOC_FAILED) &&
+ (prot_reason_status == 0x11)) ||
+ ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
+ && (ar->reconnect_flag == 1))) {
+ set_bit(CONNECTED, &ar->flag);
+ return;
+ }
+ }
+
+ if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag)) {
+ wmi_node_free(ar->wmi, bssid);
+
+ /*
+ * In case any other same SSID nodes are present remove it,
+ * since those nodes also not available now.
+ */
+ do {
+ /*
+ * Find the nodes based on SSID and remove it
+ *
+ * Note: This case will not work out for
+ * Hidden-SSID
+ */
+ wmi_ssid_node = wmi_find_ssid_node(ar->wmi, ar->ssid,
+ ar->ssid_len,
+ false,
+ true);
+
+ if (wmi_ssid_node)
+ wmi_node_free(ar->wmi,
+ wmi_ssid_node->ni_macaddr);
+
+ } while (wmi_ssid_node);
+ }
+
+ /* update connect & link status atomically */
+ spin_lock_irqsave(&ar->lock, flags);
+ clear_bit(CONNECTED, &ar->flag);
+ netif_carrier_off(ar->net_dev);
+ spin_unlock_irqrestore(&ar->lock, flags);
+
+ if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1))
+ ar->reconnect_flag = 0;
+
+ if (reason != CSERV_DISCONNECT)
+ ar->user_key_ctrl = 0;
+
+ netif_stop_queue(ar->net_dev);
+ memset(ar->bssid, 0, sizeof(ar->bssid));
+ ar->bss_ch = 0;
+
+ ath6kl_tx_data_cleanup(ar);
+}
+
+static int ath6kl_open(struct net_device *dev)
+{
+ struct ath6kl *ar = ath6kl_priv(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->lock, flags);
+
+ ar->wlan_state = WLAN_ENABLED;
+
+ if (test_bit(CONNECTED, &ar->flag)) {
+ netif_carrier_on(dev);
+ netif_wake_queue(dev);
+ } else
+ netif_carrier_off(dev);
+
+ spin_unlock_irqrestore(&ar->lock, flags);
+
+ return 0;
+}
+
+static int ath6kl_close(struct net_device *dev)
+{
+ struct ath6kl *ar = ath6kl_priv(dev);
+
+ netif_stop_queue(dev);
+
+ ath6kl_disconnect(ar);
+
+ if (test_bit(WMI_READY, &ar->flag)) {
+ if (wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0))
+ return -EIO;
+
+ ar->wlan_state = WLAN_DISABLED;
+ }
+
+ ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
+
+ return 0;
+}
+
+static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
+{
+ struct ath6kl *ar = ath6kl_priv(dev);
+
+ return &ar->net_stats;
+}
+
+static struct net_device_ops ath6kl_netdev_ops = {
+ .ndo_open = ath6kl_open,
+ .ndo_stop = ath6kl_close,
+ .ndo_start_xmit = ath6kl_data_tx,
+ .ndo_get_stats = ath6kl_get_stats,
+};
+
+void init_netdev(struct net_device *dev)
+{
+ dev->netdev_ops = &ath6kl_netdev_ops;
+ dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
+
+ dev->needed_headroom = ETH_HLEN;
+ dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
+ sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
+ + WMI_MAX_TX_META_SZ;
+
+ return;
+}
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