diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath6kl/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath6kl/main.c | 1337 |
1 files changed, 1337 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/main.c b/drivers/net/wireless/ath/ath6kl/main.c new file mode 100644 index 00000000000..284e3e96ff3 --- /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) +{ + struct ath6kl_sta *sta; + u8 free_slot; + + free_slot = aid - 1; + + sta = &ar->sta_list[free_slot]; + memcpy(sta->mac, mac, ETH_ALEN); + memcpy(sta->wpa_ie, wpaie, ielen); + sta->aid = aid; + sta->keymgmt = keymgmt; + sta->ucipher = ucipher; + sta->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) +{ + struct ath6kl_sta *sta = &ar->sta_list[i]; + + /* empty the queued pkts in the PS queue if any */ + spin_lock_bh(&sta->psq_lock); + skb_queue_purge(&sta->psq); + spin_unlock_bh(&sta->psq_lock); + + memset(&ar->ap_stats.sta[sta->aid - 1], 0, + sizeof(struct wmi_per_sta_stat)); + memset(sta->mac, 0, ETH_ALEN); + memset(sta->wpa_ie, 0, ATH6KL_MAX_IE); + sta->aid = 0; + sta->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("failed to write initial bytes of 0x%x to window reg: 0x%X\n", + 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("failed to write 0x%x to window reg: 0x%X\n", + 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("failed to read from window data addr\n"); + 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("failed to write 0x%x to window data addr\n", *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("failed to reset target\n"); +} + +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); + ath6kl_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%p 0x%p\n", + __func__, ar, 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__); + ath6kl_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; + + ath6kl_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 ath6kl_req_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 ATH6KL_CIPHER_TKIP: + keyType = TKIP_CRYPT; + break; + case ATH6KL_CIPHER_AES_CCM: + keyType = AES_CRYPT; + break; + default: + goto skip_key; + } + ath6kl_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)) { + ath6kl_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) + ath6kl_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)) + ath6kl_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) + ath6kl_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 = ath6kl_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; + ath6kl_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 = + ath6kl_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 = + ath6kl_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; + struct wmi_per_sta_stat *st_ap, *st_p; + u8 ac; + + if (ar->nw_type == AP_NETWORK) { + if (len < sizeof(*p)) + return; + + for (ac = 0; ac < AP_MAX_NUM_STA; ac++) { + st_ap = &ap->sta[ac]; + st_p = &p->sta[ac]; + + ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes); + ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts); + ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error); + ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard); + ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes); + ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts); + ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error); + ath6kl_add_le32(&st_ap->rx_discard, st_p->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) + ath6kl_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 */ + ath6kl_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)) + ath6kl_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)) + ath6kl_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)) { + ath6kl_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 = ath6kl_wmi_find_ssid_node(ar->wmi, + ar->ssid, + ar->ssid_len, + false, + true); + + if (wmi_ssid_node) + ath6kl_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); + + set_bit(WLAN_ENABLED, &ar->flag); + + 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 (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, + 0, 0, 0)) + return -EIO; + + clear_bit(WLAN_ENABLED, &ar->flag); + } + + 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; +} |