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-rw-r--r--drivers/net/wireless/ath/ar9170/main.c2210
1 files changed, 2210 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ar9170/main.c b/drivers/net/wireless/ath/ar9170/main.c
new file mode 100644
index 000000000000..9d38cf60a0db
--- /dev/null
+++ b/drivers/net/wireless/ath/ar9170/main.c
@@ -0,0 +1,2210 @@
+/*
+ * Atheros AR9170 driver
+ *
+ * mac80211 interaction code
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, Christian Lamparter <chunkeey@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * Copyright (c) 2007-2008 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <net/mac80211.h>
+#include "ar9170.h"
+#include "hw.h"
+#include "cmd.h"
+
+static int modparam_nohwcrypt;
+module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
+MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
+
+#define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
+ .bitrate = (_bitrate), \
+ .flags = (_flags), \
+ .hw_value = (_hw_rate) | (_txpidx) << 4, \
+}
+
+static struct ieee80211_rate __ar9170_ratetable[] = {
+ RATE(10, 0, 0, 0),
+ RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(60, 0xb, 0, 0),
+ RATE(90, 0xf, 0, 0),
+ RATE(120, 0xa, 0, 0),
+ RATE(180, 0xe, 0, 0),
+ RATE(240, 0x9, 0, 0),
+ RATE(360, 0xd, 1, 0),
+ RATE(480, 0x8, 2, 0),
+ RATE(540, 0xc, 3, 0),
+};
+#undef RATE
+
+#define ar9170_g_ratetable (__ar9170_ratetable + 0)
+#define ar9170_g_ratetable_size 12
+#define ar9170_a_ratetable (__ar9170_ratetable + 4)
+#define ar9170_a_ratetable_size 8
+
+/*
+ * NB: The hw_value is used as an index into the ar9170_phy_freq_params
+ * array in phy.c so that we don't have to do frequency lookups!
+ */
+#define CHAN(_freq, _idx) { \
+ .center_freq = (_freq), \
+ .hw_value = (_idx), \
+ .max_power = 18, /* XXX */ \
+}
+
+static struct ieee80211_channel ar9170_2ghz_chantable[] = {
+ CHAN(2412, 0),
+ CHAN(2417, 1),
+ CHAN(2422, 2),
+ CHAN(2427, 3),
+ CHAN(2432, 4),
+ CHAN(2437, 5),
+ CHAN(2442, 6),
+ CHAN(2447, 7),
+ CHAN(2452, 8),
+ CHAN(2457, 9),
+ CHAN(2462, 10),
+ CHAN(2467, 11),
+ CHAN(2472, 12),
+ CHAN(2484, 13),
+};
+
+static struct ieee80211_channel ar9170_5ghz_chantable[] = {
+ CHAN(4920, 14),
+ CHAN(4940, 15),
+ CHAN(4960, 16),
+ CHAN(4980, 17),
+ CHAN(5040, 18),
+ CHAN(5060, 19),
+ CHAN(5080, 20),
+ CHAN(5180, 21),
+ CHAN(5200, 22),
+ CHAN(5220, 23),
+ CHAN(5240, 24),
+ CHAN(5260, 25),
+ CHAN(5280, 26),
+ CHAN(5300, 27),
+ CHAN(5320, 28),
+ CHAN(5500, 29),
+ CHAN(5520, 30),
+ CHAN(5540, 31),
+ CHAN(5560, 32),
+ CHAN(5580, 33),
+ CHAN(5600, 34),
+ CHAN(5620, 35),
+ CHAN(5640, 36),
+ CHAN(5660, 37),
+ CHAN(5680, 38),
+ CHAN(5700, 39),
+ CHAN(5745, 40),
+ CHAN(5765, 41),
+ CHAN(5785, 42),
+ CHAN(5805, 43),
+ CHAN(5825, 44),
+ CHAN(5170, 45),
+ CHAN(5190, 46),
+ CHAN(5210, 47),
+ CHAN(5230, 48),
+};
+#undef CHAN
+
+#define AR9170_HT_CAP \
+{ \
+ .ht_supported = true, \
+ .cap = IEEE80211_HT_CAP_MAX_AMSDU | \
+ IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
+ IEEE80211_HT_CAP_SGI_40 | \
+ IEEE80211_HT_CAP_DSSSCCK40 | \
+ IEEE80211_HT_CAP_SM_PS, \
+ .ampdu_factor = 3, \
+ .ampdu_density = 6, \
+ .mcs = { \
+ .rx_mask = { 0xFF, 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, }, \
+ }, \
+}
+
+static struct ieee80211_supported_band ar9170_band_2GHz = {
+ .channels = ar9170_2ghz_chantable,
+ .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable),
+ .bitrates = ar9170_g_ratetable,
+ .n_bitrates = ar9170_g_ratetable_size,
+ .ht_cap = AR9170_HT_CAP,
+};
+
+static struct ieee80211_supported_band ar9170_band_5GHz = {
+ .channels = ar9170_5ghz_chantable,
+ .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable),
+ .bitrates = ar9170_a_ratetable,
+ .n_bitrates = ar9170_a_ratetable_size,
+ .ht_cap = AR9170_HT_CAP,
+};
+
+static void ar9170_tx(struct ar9170 *ar);
+
+#ifdef AR9170_QUEUE_DEBUG
+static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+ struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+
+ printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x "
+ "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
+ wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
+ ieee80211_get_DA(hdr), arinfo->flags,
+ le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
+ jiffies_to_msecs(arinfo->timeout - jiffies));
+}
+
+static void __ar9170_dump_txqueue(struct ar9170 *ar,
+ struct sk_buff_head *queue)
+{
+ struct sk_buff *skb;
+ int i = 0;
+
+ printk(KERN_DEBUG "---[ cut here ]---\n");
+ printk(KERN_DEBUG "%s: %d entries in queue.\n",
+ wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
+
+ skb_queue_walk(queue, skb) {
+ printk(KERN_DEBUG "index:%d => \n", i++);
+ ar9170_print_txheader(ar, skb);
+ }
+ if (i != skb_queue_len(queue))
+ printk(KERN_DEBUG "WARNING: queue frame counter "
+ "mismatch %d != %d\n", skb_queue_len(queue), i);
+ printk(KERN_DEBUG "---[ end ]---\n");
+}
+
+static void ar9170_dump_txqueue(struct ar9170 *ar,
+ struct sk_buff_head *queue)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ __ar9170_dump_txqueue(ar, queue);
+ spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void __ar9170_dump_txstats(struct ar9170 *ar)
+{
+ int i;
+
+ printk(KERN_DEBUG "%s: QoS queue stats\n",
+ wiphy_name(ar->hw->wiphy));
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++)
+ printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d\n",
+ wiphy_name(ar->hw->wiphy), i, ar->tx_stats[i].limit,
+ ar->tx_stats[i].len, skb_queue_len(&ar->tx_status[i]));
+}
+
+static void ar9170_dump_txstats(struct ar9170 *ar)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ __ar9170_dump_txstats(ar);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+}
+#endif /* AR9170_QUEUE_DEBUG */
+
+/* caller must guarantee exclusive access for _bin_ queue. */
+static void ar9170_recycle_expired(struct ar9170 *ar,
+ struct sk_buff_head *queue,
+ struct sk_buff_head *bin)
+{
+ struct sk_buff *skb, *old = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ while ((skb = skb_peek(queue))) {
+ struct ieee80211_tx_info *txinfo;
+ struct ar9170_tx_info *arinfo;
+
+ txinfo = IEEE80211_SKB_CB(skb);
+ arinfo = (void *) txinfo->rate_driver_data;
+
+ if (time_is_before_jiffies(arinfo->timeout)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => "
+ "recycle \n", wiphy_name(ar->hw->wiphy),
+ jiffies, arinfo->timeout);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ __skb_unlink(skb, queue);
+ __skb_queue_tail(bin, skb);
+ } else {
+ break;
+ }
+
+ if (unlikely(old == skb)) {
+ /* bail out - queue is shot. */
+
+ WARN_ON(1);
+ break;
+ }
+ old = skb;
+ }
+ spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+ u16 tx_status)
+{
+ struct ieee80211_tx_info *txinfo;
+ unsigned int retries = 0;
+
+ txinfo = IEEE80211_SKB_CB(skb);
+ ieee80211_tx_info_clear_status(txinfo);
+
+ switch (tx_status) {
+ case AR9170_TX_STATUS_RETRY:
+ retries = 2;
+ case AR9170_TX_STATUS_COMPLETE:
+ txinfo->flags |= IEEE80211_TX_STAT_ACK;
+ break;
+
+ case AR9170_TX_STATUS_FAILED:
+ retries = ar->hw->conf.long_frame_max_tx_count;
+ break;
+
+ default:
+ printk(KERN_ERR "%s: invalid tx_status response (%x).\n",
+ wiphy_name(ar->hw->wiphy), tx_status);
+ break;
+ }
+
+ txinfo->status.rates[0].count = retries + 1;
+ skb_pull(skb, sizeof(struct ar9170_tx_control));
+ ieee80211_tx_status_irqsafe(ar->hw, skb);
+}
+
+void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
+ unsigned int queue = skb_get_queue_mapping(skb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[queue].len--;
+
+ if (skb_queue_empty(&ar->tx_pending[queue])) {
+#ifdef AR9170_QUEUE_STOP_DEBUG
+ printk(KERN_DEBUG "%s: wake queue %d\n",
+ wiphy_name(ar->hw->wiphy), queue);
+ __ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_STOP_DEBUG */
+ ieee80211_wake_queue(ar->hw, queue);
+ }
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+ if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) {
+ dev_kfree_skb_any(skb);
+ } else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) {
+ arinfo->timeout = jiffies +
+ msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+ skb_queue_tail(&ar->tx_status[queue], skb);
+ } else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) {
+ ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
+ } else {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: unsupported frame flags!\n",
+ wiphy_name(ar->hw->wiphy));
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ dev_kfree_skb_any(skb);
+ }
+
+ if (!ar->tx_stats[queue].len &&
+ !skb_queue_empty(&ar->tx_pending[queue])) {
+ ar9170_tx(ar);
+ }
+}
+
+static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
+ const u8 *mac,
+ struct sk_buff_head *queue,
+ const u32 rate)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ /*
+ * Unfortunately, the firmware does not tell to which (queued) frame
+ * this transmission status report belongs to.
+ *
+ * So we have to make risky guesses - with the scarce information
+ * the firmware provided (-> destination MAC, and phy_control) -
+ * and hope that we picked the right one...
+ */
+
+ spin_lock_irqsave(&queue->lock, flags);
+ skb_queue_walk(queue, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+ u32 r;
+
+ if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n",
+ wiphy_name(ar->hw->wiphy), mac,
+ ieee80211_get_DA(hdr));
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ continue;
+ }
+
+ r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
+ AR9170_TX_PHY_MCS_SHIFT;
+
+ if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n",
+ wiphy_name(ar->hw->wiphy), rate, r);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ continue;
+ }
+
+ __skb_unlink(skb, queue);
+ spin_unlock_irqrestore(&queue->lock, flags);
+ return skb;
+ }
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_ERR "%s: ESS:[%pM] does not have any "
+ "outstanding frames in queue.\n",
+ wiphy_name(ar->hw->wiphy), mac);
+ __ar9170_dump_txqueue(ar, queue);
+#endif /* AR9170_QUEUE_DEBUG */
+ spin_unlock_irqrestore(&queue->lock, flags);
+
+ return NULL;
+}
+
+/*
+ * This worker tries to keeps an maintain tx_status queues.
+ * So we can guarantee that incoming tx_status reports are
+ * actually for a pending frame.
+ */
+
+static void ar9170_tx_janitor(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170,
+ tx_janitor.work);
+ struct sk_buff_head waste;
+ unsigned int i;
+ bool resched = false;
+
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ skb_queue_head_init(&waste);
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n",
+ wiphy_name(ar->hw->wiphy), i);
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+ ar9170_dump_txqueue(ar, &ar->tx_status[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
+ ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
+ skb_queue_purge(&waste);
+
+ if (!skb_queue_empty(&ar->tx_status[i]) ||
+ !skb_queue_empty(&ar->tx_pending[i]))
+ resched = true;
+ }
+
+ if (resched)
+ queue_delayed_work(ar->hw->workqueue,
+ &ar->tx_janitor,
+ msecs_to_jiffies(AR9170_JANITOR_DELAY));
+}
+
+void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
+{
+ struct ar9170_cmd_response *cmd = (void *) buf;
+
+ if ((cmd->type & 0xc0) != 0xc0) {
+ ar->callback_cmd(ar, len, buf);
+ return;
+ }
+
+ /* hardware event handlers */
+ switch (cmd->type) {
+ case 0xc1: {
+ /*
+ * TX status notification:
+ * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
+ *
+ * XX always 81
+ * YY always 00
+ * M1-M6 is the MAC address
+ * R1-R4 is the transmit rate
+ * S1-S2 is the transmit status
+ */
+
+ struct sk_buff *skb;
+ u32 phy = le32_to_cpu(cmd->tx_status.rate);
+ u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
+ AR9170_TX_PHY_QOS_SHIFT;
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n",
+ wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
+ &ar->tx_status[q],
+ AR9170_TX_INVALID_RATE);
+ if (unlikely(!skb))
+ return ;
+
+ ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
+ break;
+ }
+
+ case 0xc0:
+ /*
+ * pre-TBTT event
+ */
+ if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
+ queue_work(ar->hw->workqueue, &ar->beacon_work);
+ break;
+
+ case 0xc2:
+ /*
+ * (IBSS) beacon send notification
+ * bytes: 04 c2 XX YY B4 B3 B2 B1
+ *
+ * XX always 80
+ * YY always 00
+ * B1-B4 "should" be the number of send out beacons.
+ */
+ break;
+
+ case 0xc3:
+ /* End of Atim Window */
+ break;
+
+ case 0xc4:
+ case 0xc5:
+ /* BlockACK events */
+ break;
+
+ case 0xc6:
+ /* Watchdog Interrupt */
+ break;
+
+ case 0xc9:
+ /* retransmission issue / SIFS/EIFS collision ?! */
+ break;
+
+ /* firmware debug */
+ case 0xca:
+ printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4);
+ break;
+ case 0xcb:
+ len -= 4;
+
+ switch (len) {
+ case 1:
+ printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n",
+ *((char *)buf + 4));
+ break;
+ case 2:
+ printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n",
+ le16_to_cpup((__le16 *)((char *)buf + 4)));
+ break;
+ case 4:
+ printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n",
+ le32_to_cpup((__le32 *)((char *)buf + 4)));
+ break;
+ case 8:
+ printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n",
+ (unsigned long)le64_to_cpup(
+ (__le64 *)((char *)buf + 4)));
+ break;
+ }
+ break;
+ case 0xcc:
+ print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE,
+ (char *)buf + 4, len - 4);
+ break;
+
+ default:
+ printk(KERN_INFO "received unhandled event %x\n", cmd->type);
+ print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
+ break;
+ }
+}
+
+static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar)
+{
+ memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head));
+ ar->rx_mpdu.has_plcp = false;
+}
+
+int ar9170_nag_limiter(struct ar9170 *ar)
+{
+ bool print_message;
+
+ /*
+ * we expect all sorts of errors in promiscuous mode.
+ * don't bother with it, it's OK!
+ */
+ if (ar->sniffer_enabled)
+ return false;
+
+ /*
+ * only go for frequent errors! The hardware tends to
+ * do some stupid thing once in a while under load, in
+ * noisy environments or just for fun!
+ */
+ if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit())
+ print_message = true;
+ else
+ print_message = false;
+
+ /* reset threshold for "once in a while" */
+ ar->bad_hw_nagger = jiffies + HZ / 4;
+ return print_message;
+}
+
+static int ar9170_rx_mac_status(struct ar9170 *ar,
+ struct ar9170_rx_head *head,
+ struct ar9170_rx_macstatus *mac,
+ struct ieee80211_rx_status *status)
+{
+ u8 error, decrypt;
+
+ BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
+ BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4);
+
+ error = mac->error;
+ if (error & AR9170_RX_ERROR_MMIC) {
+ status->flag |= RX_FLAG_MMIC_ERROR;
+ error &= ~AR9170_RX_ERROR_MMIC;
+ }
+
+ if (error & AR9170_RX_ERROR_PLCP) {
+ status->flag |= RX_FLAG_FAILED_PLCP_CRC;
+ error &= ~AR9170_RX_ERROR_PLCP;
+
+ if (!(ar->filter_state & FIF_PLCPFAIL))
+ return -EINVAL;
+ }
+
+ if (error & AR9170_RX_ERROR_FCS) {
+ status->flag |= RX_FLAG_FAILED_FCS_CRC;
+ error &= ~AR9170_RX_ERROR_FCS;
+
+ if (!(ar->filter_state & FIF_FCSFAIL))
+ return -EINVAL;
+ }
+
+ decrypt = ar9170_get_decrypt_type(mac);
+ if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
+ decrypt != AR9170_ENC_ALG_NONE)
+ status->flag |= RX_FLAG_DECRYPTED;
+
+ /* ignore wrong RA errors */
+ error &= ~AR9170_RX_ERROR_WRONG_RA;
+
+ if (error & AR9170_RX_ERROR_DECRYPT) {
+ error &= ~AR9170_RX_ERROR_DECRYPT;
+ /*
+ * Rx decryption is done in place,
+ * the original data is lost anyway.
+ */
+
+ return -EINVAL;
+ }
+
+ /* drop any other error frames */
+ if (unlikely(error)) {
+ /* TODO: update netdevice's RX dropped/errors statistics */
+
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_DEBUG "%s: received frame with "
+ "suspicious error code (%#x).\n",
+ wiphy_name(ar->hw->wiphy), error);
+
+ return -EINVAL;
+ }
+
+ status->band = ar->channel->band;
+ status->freq = ar->channel->center_freq;
+
+ switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) {
+ case AR9170_RX_STATUS_MODULATION_CCK:
+ if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
+ status->flag |= RX_FLAG_SHORTPRE;
+ switch (head->plcp[0]) {
+ case 0x0a:
+ status->rate_idx = 0;
+ break;
+ case 0x14:
+ status->rate_idx = 1;
+ break;
+ case 0x37:
+ status->rate_idx = 2;
+ break;
+ case 0x6e:
+ status->rate_idx = 3;
+ break;
+ default:
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_ERR "%s: invalid plcp cck rate "
+ "(%x).\n", wiphy_name(ar->hw->wiphy),
+ head->plcp[0]);
+ return -EINVAL;
+ }
+ break;
+
+ case AR9170_RX_STATUS_MODULATION_OFDM:
+ switch (head->plcp[0] & 0xf) {
+ case 0xb:
+ status->rate_idx = 0;
+ break;
+ case 0xf:
+ status->rate_idx = 1;
+ break;
+ case 0xa:
+ status->rate_idx = 2;
+ break;
+ case 0xe:
+ status->rate_idx = 3;
+ break;
+ case 0x9:
+ status->rate_idx = 4;
+ break;
+ case 0xd:
+ status->rate_idx = 5;
+ break;
+ case 0x8:
+ status->rate_idx = 6;
+ break;
+ case 0xc:
+ status->rate_idx = 7;
+ break;
+ default:
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_ERR "%s: invalid plcp ofdm rate "
+ "(%x).\n", wiphy_name(ar->hw->wiphy),
+ head->plcp[0]);
+ return -EINVAL;
+ }
+ if (status->band == IEEE80211_BAND_2GHZ)
+ status->rate_idx += 4;
+ break;
+
+ case AR9170_RX_STATUS_MODULATION_HT:
+ if (head->plcp[3] & 0x80)
+ status->flag |= RX_FLAG_40MHZ;
+ if (head->plcp[6] & 0x80)
+ status->flag |= RX_FLAG_SHORT_GI;
+
+ status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f);
+ status->flag |= RX_FLAG_HT;
+ break;
+
+ case AR9170_RX_STATUS_MODULATION_DUPOFDM:
+ /* XXX */
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_ERR "%s: invalid modulation\n",
+ wiphy_name(ar->hw->wiphy));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void ar9170_rx_phy_status(struct ar9170 *ar,
+ struct ar9170_rx_phystatus *phy,
+ struct ieee80211_rx_status *status)
+{
+ int i;
+
+ BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20);
+
+ for (i = 0; i < 3; i++)
+ if (phy->rssi[i] != 0x80)
+ status->antenna |= BIT(i);
+
+ /* post-process RSSI */
+ for (i = 0; i < 7; i++)
+ if (phy->rssi[i] & 0x80)
+ phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f;
+
+ /* TODO: we could do something with phy_errors */
+ status->signal = ar->noise[0] + phy->rssi_combined;
+ status->noise = ar->noise[0];
+}
+
+static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len)
+{
+ struct sk_buff *skb;
+ int reserved = 0;
+ struct ieee80211_hdr *hdr = (void *) buf;
+
+ if (ieee80211_is_data_qos(hdr->frame_control)) {
+ u8 *qc = ieee80211_get_qos_ctl(hdr);
+ reserved += NET_IP_ALIGN;
+
+ if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
+ reserved += NET_IP_ALIGN;
+ }
+
+ if (ieee80211_has_a4(hdr->frame_control))
+ reserved += NET_IP_ALIGN;
+
+ reserved = 32 + (reserved & NET_IP_ALIGN);
+
+ skb = dev_alloc_skb(len + reserved);
+ if (likely(skb)) {
+ skb_reserve(skb, reserved);
+ memcpy(skb_put(skb, len), buf, len);
+ }
+
+ return skb;
+}
+
+/*
+ * If the frame alignment is right (or the kernel has
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
+ * is only a single MPDU in the USB frame, then we could
+ * submit to mac80211 the SKB directly. However, since
+ * there may be multiple packets in one SKB in stream
+ * mode, and we need to observe the proper ordering,
+ * this is non-trivial.
+ */
+
+static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
+{
+ struct ar9170_rx_head *head;
+ struct ar9170_rx_macstatus *mac;
+ struct ar9170_rx_phystatus *phy = NULL;
+ struct ieee80211_rx_status status;
+ struct sk_buff *skb;
+ int mpdu_len;
+
+ if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac))))
+ return ;
+
+ /* Received MPDU */
+ mpdu_len = len - sizeof(*mac);
+
+ mac = (void *)(buf + mpdu_len);
+ if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) {
+ /* this frame is too damaged and can't be used - drop it */
+
+ return ;
+ }
+
+ switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) {
+ case AR9170_RX_STATUS_MPDU_FIRST:
+ /* first mpdu packet has the plcp header */
+ if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) {
+ head = (void *) buf;
+ memcpy(&ar->rx_mpdu.plcp, (void *) buf,
+ sizeof(struct ar9170_rx_head));
+
+ mpdu_len -= sizeof(struct ar9170_rx_head);
+ buf += sizeof(struct ar9170_rx_head);
+ ar->rx_mpdu.has_plcp = true;
+ } else {
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_ERR "%s: plcp info is clipped.\n",
+ wiphy_name(ar->hw->wiphy));
+ return ;
+ }
+ break;
+
+ case AR9170_RX_STATUS_MPDU_LAST:
+ /* last mpdu has a extra tail with phy status information */
+
+ if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) {
+ mpdu_len -= sizeof(struct ar9170_rx_phystatus);
+ phy = (void *)(buf + mpdu_len);
+ } else {
+ if (ar9170_nag_limiter(ar))
+ printk(KERN_ERR "%s: frame tail is clipped.\n",
+ wiphy_name(ar->hw->wiphy));
+ return ;
+ }
+
+ case AR9170_RX_STATUS_MPDU_MIDDLE:
+ /* middle mpdus are just data */
+ if (unlikely(!ar->rx_mpdu.has_plcp)) {
+ if (!ar9170_nag_limiter(ar))
+ return ;
+
+ printk(KERN_ERR "%s: rx stream did not start "
+ "with a first_mpdu frame tag.\n",
+ wiphy_name(ar->hw->wiphy));
+
+ return ;
+ }
+
+ head = &ar->rx_mpdu.plcp;
+ break;
+
+ case AR9170_RX_STATUS_MPDU_SINGLE:
+ /* single mpdu - has plcp (head) and phy status (tail) */
+ head = (void *) buf;
+
+ mpdu_len -= sizeof(struct ar9170_rx_head);
+ mpdu_len -= sizeof(struct ar9170_rx_phystatus);
+
+ buf += sizeof(struct ar9170_rx_head);
+ phy = (void *)(buf + mpdu_len);
+ break;
+
+ default:
+ BUG_ON(1);
+ break;
+ }
+
+ if (unlikely(mpdu_len < FCS_LEN))
+ return ;
+
+ memset(&status, 0, sizeof(status));
+ if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status)))
+ return ;
+
+ if (phy)
+ ar9170_rx_phy_status(ar, phy, &status);
+
+ skb = ar9170_rx_copy_data(buf, mpdu_len);
+ if (likely(skb))
+ ieee80211_rx_irqsafe(ar->hw, skb, &status);
+}
+
+void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
+{
+ unsigned int i, tlen, resplen, wlen = 0, clen = 0;
+ u8 *tbuf, *respbuf;
+
+ tbuf = skb->data;
+ tlen = skb->len;
+
+ while (tlen >= 4) {
+ clen = tbuf[1] << 8 | tbuf[0];
+ wlen = ALIGN(clen, 4);
+
+ /* check if this is stream has a valid tag.*/
+ if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
+ /*
+ * TODO: handle the highly unlikely event that the
+ * corrupted stream has the TAG at the right position.
+ */
+
+ /* check if the frame can be repaired. */
+ if (!ar->rx_failover_missing) {
+ /* this is no "short read". */
+ if (ar9170_nag_limiter(ar)) {
+ printk(KERN_ERR "%s: missing tag!\n",
+ wiphy_name(ar->hw->wiphy));
+ goto err_telluser;
+ } else
+ goto err_silent;
+ }
+
+ if (ar->rx_failover_missing > tlen) {
+ if (ar9170_nag_limiter(ar)) {
+ printk(KERN_ERR "%s: possible multi "
+ "stream corruption!\n",
+ wiphy_name(ar->hw->wiphy));
+ goto err_telluser;
+ } else
+ goto err_silent;
+ }
+
+ memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
+ ar->rx_failover_missing -= tlen;
+
+ if (ar->rx_failover_missing <= 0) {
+ /*
+ * nested ar9170_rx call!
+ * termination is guranteed, even when the
+ * combined frame also have a element with
+ * a bad tag.
+ */
+
+ ar->rx_failover_missing = 0;
+ ar9170_rx(ar, ar->rx_failover);
+
+ skb_reset_tail_pointer(ar->rx_failover);
+ skb_trim(ar->rx_failover, 0);
+ }
+
+ return ;
+ }
+
+ /* check if stream is clipped */
+ if (wlen > tlen - 4) {
+ if (ar->rx_failover_missing) {
+ /* TODO: handle double stream corruption. */
+ if (ar9170_nag_limiter(ar)) {
+ printk(KERN_ERR "%s: double rx stream "
+ "corruption!\n",
+ wiphy_name(ar->hw->wiphy));
+ goto err_telluser;
+ } else
+ goto err_silent;
+ }
+
+ /*
+ * save incomplete data set.
+ * the firmware will resend the missing bits when
+ * the rx - descriptor comes round again.
+ */
+
+ memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
+ ar->rx_failover_missing = clen - tlen;
+ return ;
+ }
+ resplen = clen;
+ respbuf = tbuf + 4;
+ tbuf += wlen + 4;
+ tlen -= wlen + 4;
+
+ i = 0;
+
+ /* weird thing, but this is the same in the original driver */
+ while (resplen > 2 && i < 12 &&
+ respbuf[0] == 0xff && respbuf[1] == 0xff) {
+ i += 2;
+ resplen -= 2;
+ respbuf += 2;
+ }
+
+ if (resplen < 4)
+ continue;
+
+ /* found the 6 * 0xffff marker? */
+ if (i == 12)
+ ar9170_handle_command_response(ar, respbuf, resplen);
+ else
+ ar9170_handle_mpdu(ar, respbuf, clen);
+ }
+
+ if (tlen) {
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: %d bytes of unprocessed "
+ "data left in rx stream!\n",
+ wiphy_name(ar->hw->wiphy), tlen);
+
+ goto err_telluser;
+ }
+
+ return ;
+
+err_telluser:
+ printk(KERN_ERR "%s: damaged RX stream data [want:%d, "
+ "data:%d, rx:%d, pending:%d ]\n",
+ wiphy_name(ar->hw->wiphy), clen, wlen, tlen,
+ ar->rx_failover_missing);
+
+ if (ar->rx_failover_missing)
+ print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET,
+ ar->rx_failover->data,
+ ar->rx_failover->len);
+
+ print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET,
+ skb->data, skb->len);
+
+ printk(KERN_ERR "%s: please check your hardware and cables, if "
+ "you see this message frequently.\n",
+ wiphy_name(ar->hw->wiphy));
+
+err_silent:
+ if (ar->rx_failover_missing) {
+ skb_reset_tail_pointer(ar->rx_failover);
+ skb_trim(ar->rx_failover, 0);
+ ar->rx_failover_missing = 0;
+ }
+}
+
+#define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
+do { \
+ queue.aifs = ai_fs; \
+ queue.cw_min = cwmin; \
+ queue.cw_max = cwmax; \
+ queue.txop = _txop; \
+} while (0)
+
+static int ar9170_op_start(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+ int err, i;
+
+ mutex_lock(&ar->mutex);
+
+ ar->filter_changed = 0;
+
+ /* reinitialize queues statistics */
+ memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
+ for (i = 0; i < __AR9170_NUM_TXQ; i++)
+ ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
+
+ /* reset QoS defaults */
+ AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
+ AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */
+ AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */
+ AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */
+ AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
+
+ ar->bad_hw_nagger = jiffies;
+
+ err = ar->open(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_init_mac(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_set_qos(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
+ if (err)
+ goto out;
+
+ err = ar9170_init_rf(ar);
+ if (err)
+ goto out;
+
+ /* start DMA */
+ err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
+ if (err)
+ goto out;
+
+ ar->state = AR9170_STARTED;
+
+out:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_op_stop(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+ unsigned int i;
+
+ if (IS_STARTED(ar))
+ ar->state = AR9170_IDLE;
+
+ flush_workqueue(ar->hw->workqueue);
+
+ cancel_delayed_work_sync(&ar->tx_janitor);
+ cancel_work_sync(&ar->filter_config_work);
+ cancel_work_sync(&ar->beacon_work);
+ mutex_lock(&ar->mutex);
+
+ if (IS_ACCEPTING_CMD(ar)) {
+ ar9170_set_leds_state(ar, 0);
+
+ /* stop DMA */
+ ar9170_write_reg(ar, 0x1c3d30, 0);
+ ar->stop(ar);
+ }
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ skb_queue_purge(&ar->tx_pending[i]);
+ skb_queue_purge(&ar->tx_status[i]);
+ }
+ mutex_unlock(&ar->mutex);
+}
+
+static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr;
+ struct ar9170_tx_control *txc;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_tx_rate *txrate;
+ struct ar9170_tx_info *arinfo;
+ unsigned int queue = skb_get_queue_mapping(skb);
+ u16 keytype = 0;
+ u16 len, icv = 0;
+
+ BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
+
+ hdr = (void *)skb->data;
+ info = IEEE80211_SKB_CB(skb);
+ len = skb->len;
+
+ txc = (void *)skb_push(skb, sizeof(*txc));
+
+ if (info->control.hw_key) {
+ icv = info->control.hw_key->icv_len;
+
+ switch (info->control.hw_key->alg) {
+ case ALG_WEP:
+ keytype = AR9170_TX_MAC_ENCR_RC4;
+ break;
+ case ALG_TKIP:
+ keytype = AR9170_TX_MAC_ENCR_RC4;
+ break;
+ case ALG_CCMP:
+ keytype = AR9170_TX_MAC_ENCR_AES;
+ break;
+ default:
+ WARN_ON(1);
+ goto err_out;
+ }
+ }
+
+ /* Length */
+ txc->length = cpu_to_le16(len + icv + 4);
+
+ txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
+ AR9170_TX_MAC_BACKOFF);
+ txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
+ AR9170_TX_MAC_QOS_SHIFT);
+ txc->mac_control |= cpu_to_le16(keytype);
+ txc->phy_control = cpu_to_le32(0);
+
+ if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
+
+ txrate = &info->control.rates[0];
+ if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
+ else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
+
+ arinfo = (void *)info->rate_driver_data;
+ arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
+ if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+ if (unlikely(!info->control.sta))
+ goto err_out;
+
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
+ arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK;
+ goto out;
+ }
+
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
+ /*
+ * WARNING:
+ * Putting the QoS queue bits into an unexplored territory is
+ * certainly not elegant.
+ *
+ * In my defense: This idea provides a reasonable way to
+ * smuggle valuable information to the tx_status callback.
+ * Also, the idea behind this bit-abuse came straight from
+ * the original driver code.
+ */
+
+ txc->phy_control |=
+ cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
+ arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK;
+ } else {
+ arinfo->flags = AR9170_TX_FLAG_NO_ACK;
+ }
+
+out:
+ return 0;
+
+err_out:
+ skb_pull(skb, sizeof(*txc));
+ return -EINVAL;
+}
+
+static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ar9170_tx_control *txc;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_rate *rate = NULL;
+ struct ieee80211_tx_rate *txrate;
+ u32 power, chains;
+
+ txc = (void *) skb->data;
+ info = IEEE80211_SKB_CB(skb);
+ txrate = &info->control.rates[0];
+
+ if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
+
+ if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
+
+ if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
+ /* this works because 40 MHz is 2 and dup is 3 */
+ if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
+
+ if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
+
+ if (txrate->flags & IEEE80211_TX_RC_MCS) {
+ u32 r = txrate->idx;
+ u8 *txpower;
+
+ /* heavy clip control */
+ txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
+
+ r <<= AR9170_TX_PHY_MCS_SHIFT;
+ BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
+
+ txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
+
+ if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
+ if (info->band == IEEE80211_BAND_5GHZ)
+ txpower = ar->power_5G_ht40;
+ else
+ txpower = ar->power_2G_ht40;
+ } else {
+ if (info->band == IEEE80211_BAND_5GHZ)
+ txpower = ar->power_5G_ht20;
+ else
+ txpower = ar->power_2G_ht20;
+ }
+
+ power = txpower[(txrate->idx) & 7];
+ } else {
+ u8 *txpower;
+ u32 mod;
+ u32 phyrate;
+ u8 idx = txrate->idx;
+
+ if (info->band != IEEE80211_BAND_2GHZ) {
+ idx += 4;
+ txpower = ar->power_5G_leg;
+ mod = AR9170_TX_PHY_MOD_OFDM;
+ } else {
+ if (idx < 4) {
+ txpower = ar->power_2G_cck;
+ mod = AR9170_TX_PHY_MOD_CCK;
+ } else {
+ mod = AR9170_TX_PHY_MOD_OFDM;
+ txpower = ar->power_2G_ofdm;
+ }
+ }
+
+ rate = &__ar9170_ratetable[idx];
+
+ phyrate = rate->hw_value & 0xF;
+ power = txpower[(rate->hw_value & 0x30) >> 4];
+ phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
+
+ txc->phy_control |= cpu_to_le32(mod);
+ txc->phy_control |= cpu_to_le32(phyrate);
+ }
+
+ power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
+ power &= AR9170_TX_PHY_TX_PWR_MASK;
+ txc->phy_control |= cpu_to_le32(power);
+
+ /* set TX chains */
+ if (ar->eeprom.tx_mask == 1) {
+ chains = AR9170_TX_PHY_TXCHAIN_1;
+ } else {
+ chains = AR9170_TX_PHY_TXCHAIN_2;
+
+ /* >= 36M legacy OFDM - use only one chain */
+ if (rate && rate->bitrate >= 360)
+ chains = AR9170_TX_PHY_TXCHAIN_1;
+ }
+ txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
+}
+
+static void ar9170_tx(struct ar9170 *ar)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct ieee80211_tx_info *info;
+ struct ar9170_tx_info *arinfo;
+ unsigned int i, frames, frames_failed, remaining_space;
+ int err;
+ bool schedule_garbagecollector = false;
+
+ BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
+
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ remaining_space = AR9170_TX_MAX_PENDING;
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: queue %d full\n",
+ wiphy_name(ar->hw->wiphy), i);
+
+ __ar9170_dump_txstats(ar);
+ printk(KERN_DEBUG "stuck frames: ===> \n");
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+ ar9170_dump_txqueue(ar, &ar->tx_status[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+ ieee80211_stop_queue(ar->hw, i);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+ continue;
+ }
+
+ frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
+ skb_queue_len(&ar->tx_pending[i]));
+
+ if (remaining_space < frames) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: tx quota reached queue:%d, "
+ "remaining slots:%d, needed:%d\n",
+ wiphy_name(ar->hw->wiphy), i, remaining_space,
+ frames);
+
+ ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_DEBUG */
+ frames = remaining_space;
+ }
+
+ ar->tx_stats[i].len += frames;
+ ar->tx_stats[i].count += frames;
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+ if (!frames)
+ continue;
+
+ frames_failed = 0;
+ while (frames) {
+ skb = skb_dequeue(&ar->tx_pending[i]);
+ if (unlikely(!skb)) {
+ frames_failed += frames;
+ frames = 0;
+ break;
+ }
+
+ info = IEEE80211_SKB_CB(skb);
+ arinfo = (void *) info->rate_driver_data;
+
+ /* TODO: cancel stuck frames */
+ arinfo->timeout = jiffies +
+ msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: send frame q:%d =>\n",
+ wiphy_name(ar->hw->wiphy), i);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ err = ar->tx(ar, skb);
+ if (unlikely(err)) {
+ frames_failed++;
+ dev_kfree_skb_any(skb);
+ } else {
+ remaining_space--;
+ schedule_garbagecollector = true;
+ }
+
+ frames--;
+ }
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n",
+ wiphy_name(ar->hw->wiphy), i);
+
+ printk(KERN_DEBUG "%s: unprocessed pending frames left:\n",
+ wiphy_name(ar->hw->wiphy));
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ if (unlikely(frames_failed)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: frames failed =>\n",
+ wiphy_name(ar->hw->wiphy), frames_failed);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[i].len -= frames_failed;
+ ar->tx_stats[i].count -= frames_failed;
+ ieee80211_wake_queue(ar->hw, i);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+ }
+ }
+
+ if (schedule_garbagecollector)
+ queue_delayed_work(ar->hw->workqueue,
+ &ar->tx_janitor,
+ msecs_to_jiffies(AR9170_JANITOR_DELAY));
+}
+
+int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct ar9170 *ar = hw->priv;
+ struct ieee80211_tx_info *info;
+
+ if (unlikely(!IS_STARTED(ar)))
+ goto err_free;
+
+ if (unlikely(ar9170_tx_prepare(ar, skb)))
+ goto err_free;
+
+ info = IEEE80211_SKB_CB(skb);
+ if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+ /* drop frame, we do not allow TX A-MPDU aggregation yet. */
+ goto err_free;
+ } else {
+ unsigned int queue = skb_get_queue_mapping(skb);
+
+ ar9170_tx_prepare_phy(ar, skb);
+ skb_queue_tail(&ar->tx_pending[queue], skb);
+ }
+
+ ar9170_tx(ar);
+ return NETDEV_TX_OK;
+
+err_free:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
+
+static int ar9170_op_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (ar->vif) {
+ err = -EBUSY;
+ goto unlock;
+ }
+
+ ar->vif = conf->vif;
+ memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN);
+
+ if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
+ ar->rx_software_decryption = true;
+ ar->disable_offload = true;
+ }
+
+ ar->cur_filter = 0;
+ ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS;
+ err = ar9170_update_frame_filter(ar);
+ if (err)
+ goto unlock;
+
+ err = ar9170_set_operating_mode(ar);
+
+unlock:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct ar9170 *ar = hw->priv;
+
+ mutex_lock(&ar->mutex);
+ ar->vif = NULL;
+ ar->want_filter = 0;
+ ar9170_update_frame_filter(ar);
+ ar9170_set_beacon_timers(ar);
+ dev_kfree_skb(ar->beacon);
+ ar->beacon = NULL;
+ ar->sniffer_enabled = false;
+ ar->rx_software_decryption = false;
+ ar9170_set_operating_mode(ar);
+ mutex_unlock(&ar->mutex);
+}
+
+static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_PS) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_POWER) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
+ /*
+ * is it long_frame_max_tx_count or short_frame_max_tx_count?
+ */
+
+ err = ar9170_set_hwretry_limit(ar,
+ ar->hw->conf.long_frame_max_tx_count);
+ if (err)
+ goto out;
+ }
+
+ if (changed & BSS_CHANGED_BEACON_INT) {
+ err = ar9170_set_beacon_timers(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+
+ /* adjust slot time for 5 GHz */
+ err = ar9170_set_slot_time(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_set_dyn_sifs_ack(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_set_channel(ar, hw->conf.channel,
+ AR9170_RFI_NONE,
+ nl80211_to_ar9170(hw->conf.channel_type));
+ if (err)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_set_filters(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170,
+ filter_config_work);
+ int err;
+
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ mutex_lock(&ar->mutex);
+ if (test_and_clear_bit(AR9170_FILTER_CHANGED_MODE,
+ &ar->filter_changed)) {
+ err = ar9170_set_operating_mode(ar);
+ if (err)
+ goto unlock;
+ }
+
+ if (test_and_clear_bit(AR9170_FILTER_CHANGED_MULTICAST,
+ &ar->filter_changed)) {
+ err = ar9170_update_multicast(ar);
+ if (err)
+ goto unlock;
+ }
+
+ if (test_and_clear_bit(AR9170_FILTER_CHANGED_FRAMEFILTER,
+ &ar->filter_changed)) {
+ err = ar9170_update_frame_filter(ar);
+ if (err)
+ goto unlock;
+ }
+
+unlock:
+ mutex_unlock(&ar->mutex);
+}
+
+static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
+ unsigned int changed_flags,
+ unsigned int *new_flags,
+ int mc_count, struct dev_mc_list *mclist)
+{
+ struct ar9170 *ar = hw->priv;
+
+ /* mask supported flags */
+ *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
+ FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL;
+ ar->filter_state = *new_flags;
+ /*
+ * We can support more by setting the sniffer bit and
+ * then checking the error flags, later.
+ */
+
+ if (changed_flags & FIF_ALLMULTI) {
+ if (*new_flags & FIF_ALLMULTI) {
+ ar->want_mc_hash = ~0ULL;
+ } else {
+ u64 mchash;
+ int i;
+
+ /* always get broadcast frames */
+ mchash = 1ULL << (0xff >> 2);
+
+ for (i = 0; i < mc_count; i++) {
+ if (WARN_ON(!mclist))
+ break;
+ mchash |= 1ULL << (mclist->dmi_addr[5] >> 2);
+ mclist = mclist->next;
+ }
+ ar->want_mc_hash = mchash;
+ }
+ set_bit(AR9170_FILTER_CHANGED_MULTICAST, &ar->filter_changed);
+ }
+
+ if (changed_flags & FIF_CONTROL) {
+ u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
+ AR9170_MAC_REG_FTF_RTS |
+ AR9170_MAC_REG_FTF_CTS |
+ AR9170_MAC_REG_FTF_ACK |
+ AR9170_MAC_REG_FTF_CFE |
+ AR9170_MAC_REG_FTF_CFE_ACK;
+
+ if (*new_flags & FIF_CONTROL)
+ ar->want_filter = ar->cur_filter | filter;
+ else
+ ar->want_filter = ar->cur_filter & ~filter;
+
+ set_bit(AR9170_FILTER_CHANGED_FRAMEFILTER,
+ &ar->filter_changed);
+ }
+
+ if (changed_flags & FIF_PROMISC_IN_BSS) {
+ ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
+ set_bit(AR9170_FILTER_CHANGED_MODE,
+ &ar->filter_changed);
+ }
+
+ if (likely(IS_STARTED(ar)))
+ queue_work(ar->hw->workqueue, &ar->filter_config_work);
+}
+
+static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss_conf,
+ u32 changed)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (changed & BSS_CHANGED_BSSID) {
+ memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN);
+ err = ar9170_set_operating_mode(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) {
+ err = ar9170_update_beacon(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_set_beacon_timers(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & BSS_CHANGED_ASSOC) {
+#ifndef CONFIG_AR9170_LEDS
+ /* enable assoc LED. */
+ err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
+#endif /* CONFIG_AR9170_LEDS */
+ }
+
+ if (changed & BSS_CHANGED_BEACON_INT) {
+ err = ar9170_set_beacon_timers(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & BSS_CHANGED_HT) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & BSS_CHANGED_ERP_SLOT) {
+ err = ar9170_set_slot_time(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & BSS_CHANGED_BASIC_RATES) {
+ err = ar9170_set_basic_rates(ar);
+ if (err)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&ar->mutex);
+}
+
+static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+ int err;
+ u32 tsf_low;
+ u32 tsf_high;
+ u64 tsf;
+
+ mutex_lock(&ar->mutex);
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low);
+ if (!err)
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high);
+ mutex_unlock(&ar->mutex);
+
+ if (WARN_ON(err))
+ return 0;
+
+ tsf = tsf_high;
+ tsf = (tsf << 32) | tsf_low;
+ return tsf;
+}
+
+static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+ struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0, i;
+ u8 ktype;
+
+ if ((!ar->vif) || (ar->disable_offload))
+ return -EOPNOTSUPP;
+
+ switch (key->alg) {
+ case ALG_WEP:
+ if (key->keylen == WLAN_KEY_LEN_WEP40)
+ ktype = AR9170_ENC_ALG_WEP64;
+ else
+ ktype = AR9170_ENC_ALG_WEP128;
+ break;
+ case ALG_TKIP:
+ ktype = AR9170_ENC_ALG_TKIP;
+ break;
+ case ALG_CCMP:
+ ktype = AR9170_ENC_ALG_AESCCMP;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&ar->mutex);
+ if (cmd == SET_KEY) {
+ if (unlikely(!IS_STARTED(ar))) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ /* group keys need all-zeroes address */
+ if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+ sta = NULL;
+
+ if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
+ for (i = 0; i < 64; i++)
+ if (!(ar->usedkeys & BIT(i)))
+ break;
+ if (i == 64) {
+ ar->rx_software_decryption = true;
+ ar9170_set_operating_mode(ar);
+ err = -ENOSPC;
+ goto out;
+ }
+ } else {
+ i = 64 + key->keyidx;
+ }
+
+ key->hw_key_idx = i;
+
+ err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
+ key->key, min_t(u8, 16, key->keylen));
+ if (err)
+ goto out;
+
+ if (key->alg == ALG_TKIP) {
+ err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
+ ktype, 1, key->key + 16, 16);
+ if (err)
+ goto out;
+
+ /*
+ * hardware is not capable generating the MMIC
+ * for fragmented frames!
+ */
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+ }
+
+ if (i < 64)
+ ar->usedkeys |= BIT(i);
+
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ } else {
+ if (unlikely(!IS_STARTED(ar))) {
+ /* The device is gone... together with the key ;-) */
+ err = 0;
+ goto out;
+ }
+
+ err = ar9170_disable_key(ar, key->hw_key_idx);
+ if (err)
+ goto out;
+
+ if (key->hw_key_idx < 64) {
+ ar->usedkeys &= ~BIT(key->hw_key_idx);
+ } else {
+ err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
+ AR9170_ENC_ALG_NONE, 0,
+ NULL, 0);
+ if (err)
+ goto out;
+
+ if (key->alg == ALG_TKIP) {
+ err = ar9170_upload_key(ar, key->hw_key_idx,
+ NULL,
+ AR9170_ENC_ALG_NONE, 1,
+ NULL, 0);
+ if (err)
+ goto out;
+ }
+
+ }
+ }
+
+ ar9170_regwrite_begin(ar);
+ ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
+ ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
+ ar9170_regwrite_finish();
+ err = ar9170_regwrite_result();
+
+out:
+ mutex_unlock(&ar->mutex);
+
+ return err;
+}
+
+static void ar9170_sta_notify(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ enum sta_notify_cmd cmd,
+ struct ieee80211_sta *sta)
+{
+}
+
+static int ar9170_get_stats(struct ieee80211_hw *hw,
+ struct ieee80211_low_level_stats *stats)
+{
+ struct ar9170 *ar = hw->priv;
+ u32 val;
+ int err;
+
+ mutex_lock(&ar->mutex);
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
+ ar->stats.dot11ACKFailureCount += val;
+
+ memcpy(stats, &ar->stats, sizeof(*stats));
+ mutex_unlock(&ar->mutex);
+
+ return 0;
+}
+
+static int ar9170_get_tx_stats(struct ieee80211_hw *hw,
+ struct ieee80211_tx_queue_stats *tx_stats)
+{
+ struct ar9170 *ar = hw->priv;
+
+ spin_lock_bh(&ar->tx_stats_lock);
+ memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues);
+ spin_unlock_bh(&ar->tx_stats_lock);
+
+ return 0;
+}
+
+static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
+ const struct ieee80211_tx_queue_params *param)
+{
+ struct ar9170 *ar = hw->priv;
+ int ret;
+
+ mutex_lock(&ar->mutex);
+ if ((param) && !(queue > __AR9170_NUM_TXQ)) {
+ memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
+ param, sizeof(*param));
+
+ ret = ar9170_set_qos(ar);
+ } else
+ ret = -EINVAL;
+
+ mutex_unlock(&ar->mutex);
+ return ret;
+}
+
+static int ar9170_ampdu_action(struct ieee80211_hw *hw,
+ enum ieee80211_ampdu_mlme_action action,
+ struct ieee80211_sta *sta, u16 tid, u16 *ssn)
+{
+ switch (action) {
+ case IEEE80211_AMPDU_RX_START:
+ case IEEE80211_AMPDU_RX_STOP:
+ /*
+ * Something goes wrong -- RX locks up
+ * after a while of receiving aggregated
+ * frames -- not enabling for now.
+ */
+ return -EOPNOTSUPP;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct ieee80211_ops ar9170_ops = {
+ .start = ar9170_op_start,
+ .stop = ar9170_op_stop,
+ .tx = ar9170_op_tx,
+ .add_interface = ar9170_op_add_interface,
+ .remove_interface = ar9170_op_remove_interface,
+ .config = ar9170_op_config,
+ .configure_filter = ar9170_op_configure_filter,
+ .conf_tx = ar9170_conf_tx,
+ .bss_info_changed = ar9170_op_bss_info_changed,
+ .get_tsf = ar9170_op_get_tsf,
+ .set_key = ar9170_set_key,
+ .sta_notify = ar9170_sta_notify,
+ .get_stats = ar9170_get_stats,
+ .get_tx_stats = ar9170_get_tx_stats,
+ .ampdu_action = ar9170_ampdu_action,
+};
+
+void *ar9170_alloc(size_t priv_size)
+{
+ struct ieee80211_hw *hw;
+ struct ar9170 *ar;
+ struct sk_buff *skb;
+ int i;
+
+ /*
+ * this buffer is used for rx stream reconstruction.
+ * Under heavy load this device (or the transport layer?)
+ * tends to split the streams into seperate rx descriptors.
+ */
+
+ skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL);
+ if (!skb)
+ goto err_nomem;
+
+ hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
+ if (!hw)
+ goto err_nomem;
+
+ ar = hw->priv;
+ ar->hw = hw;
+ ar->rx_failover = skb;
+
+ mutex_init(&ar->mutex);
+ spin_lock_init(&ar->cmdlock);
+ spin_lock_init(&ar->tx_stats_lock);
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ skb_queue_head_init(&ar->tx_status[i]);
+ skb_queue_head_init(&ar->tx_pending[i]);
+ }
+ ar9170_rx_reset_rx_mpdu(ar);
+ INIT_WORK(&ar->filter_config_work, ar9170_set_filters);
+ INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
+ INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
+
+ /* all hw supports 2.4 GHz, so set channel to 1 by default */
+ ar->channel = &ar9170_2ghz_chantable[0];
+
+ /* first part of wiphy init */
+ ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_WDS) |
+ BIT(NL80211_IFTYPE_ADHOC);
+ ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_NOISE_DBM;
+
+ ar->hw->queues = __AR9170_NUM_TXQ;
+ ar->hw->extra_tx_headroom = 8;
+ ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
+
+ ar->hw->max_rates = 1;
+ ar->hw->max_rate_tries = 3;
+
+ for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
+ ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
+
+ return ar;
+
+err_nomem:
+ kfree_skb(skb);
+ return ERR_PTR(-ENOMEM);
+}
+
+static int ar9170_read_eeprom(struct ar9170 *ar)
+{
+#define RW 8 /* number of words to read at once */
+#define RB (sizeof(u32) * RW)
+ DECLARE_MAC_BUF(mbuf);
+ u8 *eeprom = (void *)&ar->eeprom;
+ u8 *addr = ar->eeprom.mac_address;
+ __le32 offsets[RW];
+ int i, j, err, bands = 0;
+
+ BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
+
+ BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
+#ifndef __CHECKER__
+ /* don't want to handle trailing remains */
+ BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
+#endif
+
+ for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
+ for (j = 0; j < RW; j++)
+ offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
+ RB * i + 4 * j);
+
+ err = ar->exec_cmd(ar, AR9170_CMD_RREG,
+ RB, (u8 *) &offsets,
+ RB, eeprom + RB * i);
+ if (err)
+ return err;
+ }
+
+#undef RW
+#undef RB
+
+ if (ar->eeprom.length == cpu_to_le16(0xFFFF))
+ return -ENODATA;
+
+ if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
+ ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
+ bands++;
+ }
+ if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
+ ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
+ bands++;
+ }
+ /*
+ * I measured this, a bandswitch takes roughly
+ * 135 ms and a frequency switch about 80.
+ *
+ * FIXME: measure these values again once EEPROM settings
+ * are used, that will influence them!
+ */
+ if (bands == 2)
+ ar->hw->channel_change_time = 135 * 1000;
+ else
+ ar->hw->channel_change_time = 80 * 1000;
+
+ ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
+ ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
+
+ /* second part of wiphy init */
+ SET_IEEE80211_PERM_ADDR(ar->hw, addr);
+
+ return bands ? 0 : -EINVAL;
+}
+
+static int ar9170_reg_notifier(struct wiphy *wiphy,
+ struct regulatory_request *request)
+{
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct ar9170 *ar = hw->priv;
+
+ return ath_reg_notifier_apply(wiphy, request, &ar->regulatory);
+}
+
+int ar9170_register(struct ar9170 *ar, struct device *pdev)
+{
+ int err;
+
+ /* try to read EEPROM, init MAC addr */
+ err = ar9170_read_eeprom(ar);
+ if (err)
+ goto err_out;
+
+ err = ath_regd_init(&ar->regulatory, ar->hw->wiphy,
+ ar9170_reg_notifier);
+ if (err)
+ goto err_out;
+
+ err = ieee80211_register_hw(ar->hw);
+ if (err)
+ goto err_out;
+
+ if (!ath_is_world_regd(&ar->regulatory))
+ regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2);
+
+ err = ar9170_init_leds(ar);
+ if (err)
+ goto err_unreg;
+
+#ifdef CONFIG_AR9170_LEDS
+ err = ar9170_register_leds(ar);
+ if (err)
+ goto err_unreg;
+#endif /* CONFIG_AR9170_LEDS */
+
+ dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
+ wiphy_name(ar->hw->wiphy));
+
+ return err;
+
+err_unreg:
+ ieee80211_unregister_hw(ar->hw);
+
+err_out:
+ return err;
+}
+
+void ar9170_unregister(struct ar9170 *ar)
+{
+#ifdef CONFIG_AR9170_LEDS
+ ar9170_unregister_leds(ar);
+#endif /* CONFIG_AR9170_LEDS */
+
+ kfree_skb(ar->rx_failover);
+ ieee80211_unregister_hw(ar->hw);
+ mutex_destroy(&ar->mutex);
+}