2 Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic mac80211 routines.
27 * Set enviroment defines for rt2x00.h
29 #define DRV_NAME "rt2x00lib"
31 #include <linux/kernel.h>
32 #include <linux/module.h>
35 #include "rt2x00lib.h"
37 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
38 struct data_ring *ring,
39 struct sk_buff *frag_skb,
40 struct ieee80211_tx_control *control)
45 if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
46 size = sizeof(struct ieee80211_cts);
48 size = sizeof(struct ieee80211_rts);
50 skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom);
52 WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
53 return NETDEV_TX_BUSY;
56 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
59 if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
60 ieee80211_ctstoself_get(rt2x00dev->hw, rt2x00dev->interface.id,
61 frag_skb->data, frag_skb->len, control,
62 (struct ieee80211_cts *)(skb->data));
64 ieee80211_rts_get(rt2x00dev->hw, rt2x00dev->interface.id,
65 frag_skb->data, frag_skb->len, control,
66 (struct ieee80211_rts *)(skb->data));
68 if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
69 WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
70 return NETDEV_TX_BUSY;
76 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
77 struct ieee80211_tx_control *control)
79 struct rt2x00_dev *rt2x00dev = hw->priv;
80 struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
81 struct data_ring *ring;
85 * Determine which ring to put packet on.
87 ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
88 if (unlikely(!ring)) {
90 "Attempt to send packet over invalid queue %d.\n"
91 "Please file bug report to %s.\n",
92 control->queue, DRV_PROJECT);
93 dev_kfree_skb_any(skb);
98 * If CTS/RTS is required. and this frame is not CTS or RTS,
99 * create and queue that frame first. But make sure we have
100 * at least enough entries available to send this CTS/RTS
101 * frame as well as the data frame.
103 frame_control = le16_to_cpu(ieee80211hdr->frame_control);
104 if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
105 (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS |
106 IEEE80211_TXCTL_USE_CTS_PROTECT))) {
107 if (rt2x00_ring_free(ring) <= 1)
108 return NETDEV_TX_BUSY;
110 if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control))
111 return NETDEV_TX_BUSY;
114 if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control))
115 return NETDEV_TX_BUSY;
117 if (rt2x00dev->ops->lib->kick_tx_queue)
118 rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
122 EXPORT_SYMBOL_GPL(rt2x00mac_tx);
124 int rt2x00mac_start(struct ieee80211_hw *hw)
126 struct rt2x00_dev *rt2x00dev = hw->priv;
129 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
133 * If this is the first interface which is added,
134 * we should load the firmware now.
136 if (test_bit(REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
137 status = rt2x00lib_load_firmware(rt2x00dev);
143 * Initialize the device.
145 status = rt2x00lib_initialize(rt2x00dev);
152 status = rt2x00lib_enable_radio(rt2x00dev);
154 rt2x00lib_uninitialize(rt2x00dev);
160 EXPORT_SYMBOL_GPL(rt2x00mac_start);
162 void rt2x00mac_stop(struct ieee80211_hw *hw)
164 struct rt2x00_dev *rt2x00dev = hw->priv;
167 * Perhaps we can add something smarter here,
168 * but for now just disabling the radio should do.
170 rt2x00lib_disable_radio(rt2x00dev);
172 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
174 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
175 struct ieee80211_if_init_conf *conf)
177 struct rt2x00_dev *rt2x00dev = hw->priv;
178 struct interface *intf = &rt2x00dev->interface;
182 * We only support 1 non-monitor interface.
184 if (conf->type != IEEE80211_IF_TYPE_MNTR && is_interface_present(intf))
188 * HACK: Placeholder until start/stop handler has been
189 * added to the mac80211 callback functions structure.
191 retval = rt2x00mac_start(hw);
196 * We support muliple monitor mode interfaces.
197 * All we need to do is increase the monitor_count.
199 if (conf->type == IEEE80211_IF_TYPE_MNTR) {
200 intf->monitor_count++;
202 intf->id = conf->if_id;
203 intf->type = conf->type;
204 if (conf->type == IEEE80211_IF_TYPE_AP)
205 memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
206 memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);
211 * Configure interface.
212 * The MAC adddress must be configured after the device
213 * has been initialized. Else the device can reset the
216 rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
217 rt2x00lib_config_type(rt2x00dev, conf->type);
218 rt2x00lib_config_packet_filter(rt2x00dev, intf->filter);
222 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
224 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
225 struct ieee80211_if_init_conf *conf)
227 struct rt2x00_dev *rt2x00dev = hw->priv;
228 struct interface *intf = &rt2x00dev->interface;
231 * We only support 1 non-monitor interface.
233 if (conf->type != IEEE80211_IF_TYPE_MNTR && !is_interface_present(intf))
237 * When removing an monitor interface, decrease monitor_count.
238 * For non-monitor interfaces, all interface data needs to be reset.
240 if (conf->type == IEEE80211_IF_TYPE_MNTR) {
241 intf->monitor_count--;
242 } else if (intf->type == conf->type) {
244 intf->type = INVALID_INTERFACE;
245 memset(&intf->bssid, 0x00, ETH_ALEN);
246 memset(&intf->mac, 0x00, ETH_ALEN);
251 * Make sure the bssid and mac address registers
252 * are cleared to prevent false ACKing of frames.
254 rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
255 rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
256 rt2x00lib_config_type(rt2x00dev, intf->type);
259 * HACK: Placeholder untill start/stop handler has been
260 * added to the mac80211 callback functions structure.
264 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
266 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
268 struct rt2x00_dev *rt2x00dev = hw->priv;
271 * If the device is not initialized we shouldn't accept
272 * any configuration changes. Mac80211 might be calling
273 * this function while we are trying to remove the device
274 * or perhaps suspending it.
276 if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
280 * Check if we need to disable the radio,
281 * if this is not the case, at least the RX must be disabled.
283 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) {
284 if (!conf->radio_enabled)
285 rt2x00lib_disable_radio(rt2x00dev);
287 rt2x00lib_toggle_rx(rt2x00dev, 0);
290 rt2x00lib_config(rt2x00dev, conf);
293 * If promisc mode cannot be configured in irq context,
294 * then it is now the time to configure it.
296 if (test_bit(PACKET_FILTER_SCHEDULED, &rt2x00dev->flags))
297 rt2x00lib_config_packet_filter(rt2x00dev,
298 rt2x00dev->interface.filter);
301 * Reenable RX only if the radio should be on.
303 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
304 rt2x00lib_toggle_rx(rt2x00dev, 1);
305 else if (conf->radio_enabled)
306 return rt2x00lib_enable_radio(rt2x00dev);
310 EXPORT_SYMBOL_GPL(rt2x00mac_config);
312 int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id,
313 struct ieee80211_if_conf *conf)
315 struct rt2x00_dev *rt2x00dev = hw->priv;
316 struct interface *intf = &rt2x00dev->interface;
320 * If the device is not initialized we shouldn't accept
321 * any configuration changes. Mac80211 might be calling
322 * this function while we are trying to remove the device
323 * or perhaps suspending it.
325 if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
329 * Monitor mode does not need configuring.
330 * If the given type does not match the configured type,
331 * there has been a problem.
333 if (conf->type == IEEE80211_IF_TYPE_MNTR)
335 else if (conf->type != intf->type)
339 * If the interface does not work in master mode,
340 * then the bssid value in the interface structure
343 if (conf->type != IEEE80211_IF_TYPE_AP)
344 memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
345 rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
348 * We only need to initialize the beacon when master mode is enabled.
350 if (conf->type != IEEE80211_IF_TYPE_AP || !conf->beacon)
353 status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
355 conf->beacon_control);
357 dev_kfree_skb(conf->beacon);
361 EXPORT_SYMBOL_GPL(rt2x00mac_config_interface);
363 void rt2x00mac_set_multicast_list(struct ieee80211_hw *hw,
364 unsigned short flags, int mc_count)
366 struct rt2x00_dev *rt2x00dev = hw->priv;
369 * Check if the new state is different then the old state.
371 if (rt2x00dev->interface.filter == flags)
374 rt2x00dev->interface.filter = flags;
377 * Raise the pending bit to indicate the
378 * packet filter should be updated.
380 __set_bit(PACKET_FILTER_PENDING, &rt2x00dev->flags);
383 * Check if Packet filter actions are allowed in
384 * atomic context. If not, raise the pending flag and
387 if (!test_bit(PACKET_FILTER_SCHEDULED, &rt2x00dev->flags) ||
389 rt2x00lib_config_packet_filter(rt2x00dev, flags);
391 EXPORT_SYMBOL_GPL(rt2x00mac_set_multicast_list);
393 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
394 struct ieee80211_low_level_stats *stats)
396 struct rt2x00_dev *rt2x00dev = hw->priv;
399 * The dot11ACKFailureCount, dot11RTSFailureCount and
400 * dot11RTSSuccessCount are updated in interrupt time.
401 * dot11FCSErrorCount is updated in the link tuner.
403 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
407 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
409 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
410 struct ieee80211_tx_queue_stats *stats)
412 struct rt2x00_dev *rt2x00dev = hw->priv;
415 for (i = 0; i < hw->queues; i++)
416 memcpy(&stats->data[i], &rt2x00dev->tx[i].stats,
417 sizeof(rt2x00dev->tx[i].stats));
421 EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);
423 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
424 const struct ieee80211_tx_queue_params *params)
426 struct rt2x00_dev *rt2x00dev = hw->priv;
427 struct data_ring *ring;
429 ring = rt2x00lib_get_ring(rt2x00dev, queue);
434 * The passed variables are stored as real value ((2^n)-1).
435 * Ralink registers require to know the bit number 'n'.
438 ring->tx_params.cw_min = fls(params->cw_min);
440 ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */
443 ring->tx_params.cw_max = fls(params->cw_max);
445 ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */
448 ring->tx_params.aifs = params->aifs;
450 ring->tx_params.aifs = 2;
453 "Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
454 queue, ring->tx_params.cw_min, ring->tx_params.cw_max,
455 ring->tx_params.aifs);
459 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);