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
);