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.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
32 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev
*rt2x00dev
,
33 struct data_ring
*ring
,
34 struct sk_buff
*frag_skb
,
35 struct ieee80211_tx_control
*control
)
40 if (control
->flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
)
41 size
= sizeof(struct ieee80211_cts
);
43 size
= sizeof(struct ieee80211_rts
);
45 skb
= dev_alloc_skb(size
+ rt2x00dev
->hw
->extra_tx_headroom
);
47 WARNING(rt2x00dev
, "Failed to create RTS/CTS frame.\n");
48 return NETDEV_TX_BUSY
;
51 skb_reserve(skb
, rt2x00dev
->hw
->extra_tx_headroom
);
54 if (control
->flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
)
55 ieee80211_ctstoself_get(rt2x00dev
->hw
, rt2x00dev
->interface
.id
,
56 frag_skb
->data
, frag_skb
->len
, control
,
57 (struct ieee80211_cts
*)(skb
->data
));
59 ieee80211_rts_get(rt2x00dev
->hw
, rt2x00dev
->interface
.id
,
60 frag_skb
->data
, frag_skb
->len
, control
,
61 (struct ieee80211_rts
*)(skb
->data
));
63 if (rt2x00dev
->ops
->lib
->write_tx_data(rt2x00dev
, ring
, skb
, control
)) {
64 WARNING(rt2x00dev
, "Failed to send RTS/CTS frame.\n");
65 return NETDEV_TX_BUSY
;
71 int rt2x00mac_tx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
72 struct ieee80211_tx_control
*control
)
74 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
75 struct ieee80211_hdr
*ieee80211hdr
= (struct ieee80211_hdr
*)skb
->data
;
76 struct data_ring
*ring
;
80 * Mac80211 might be calling this function while we are trying
81 * to remove the device or perhaps suspending it.
82 * Note that we can only stop the TX queues inside the TX path
83 * due to possible race conditions in mac80211.
85 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
)) {
86 ieee80211_stop_queues(hw
);
91 * Determine which ring to put packet on.
93 ring
= rt2x00lib_get_ring(rt2x00dev
, control
->queue
);
94 if (unlikely(!ring
)) {
96 "Attempt to send packet over invalid queue %d.\n"
97 "Please file bug report to %s.\n",
98 control
->queue
, DRV_PROJECT
);
99 dev_kfree_skb_any(skb
);
104 * If CTS/RTS is required. and this frame is not CTS or RTS,
105 * create and queue that frame first. But make sure we have
106 * at least enough entries available to send this CTS/RTS
107 * frame as well as the data frame.
109 frame_control
= le16_to_cpu(ieee80211hdr
->frame_control
);
110 if (!is_rts_frame(frame_control
) && !is_cts_frame(frame_control
) &&
111 (control
->flags
& (IEEE80211_TXCTL_USE_RTS_CTS
|
112 IEEE80211_TXCTL_USE_CTS_PROTECT
))) {
113 if (rt2x00_ring_free(ring
) <= 1)
114 return NETDEV_TX_BUSY
;
116 if (rt2x00mac_tx_rts_cts(rt2x00dev
, ring
, skb
, control
))
117 return NETDEV_TX_BUSY
;
120 if (rt2x00dev
->ops
->lib
->write_tx_data(rt2x00dev
, ring
, skb
, control
))
121 return NETDEV_TX_BUSY
;
123 if (rt2x00dev
->ops
->lib
->kick_tx_queue
)
124 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, control
->queue
);
128 EXPORT_SYMBOL_GPL(rt2x00mac_tx
);
130 int rt2x00mac_start(struct ieee80211_hw
*hw
)
132 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
135 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
) ||
136 test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
140 * If this is the first interface which is added,
141 * we should load the firmware now.
143 if (test_bit(DRIVER_REQUIRE_FIRMWARE
, &rt2x00dev
->flags
)) {
144 status
= rt2x00lib_load_firmware(rt2x00dev
);
150 * Initialize the device.
152 status
= rt2x00lib_initialize(rt2x00dev
);
159 status
= rt2x00lib_enable_radio(rt2x00dev
);
161 rt2x00lib_uninitialize(rt2x00dev
);
165 __set_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
169 EXPORT_SYMBOL_GPL(rt2x00mac_start
);
171 void rt2x00mac_stop(struct ieee80211_hw
*hw
)
173 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
175 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
))
179 * Perhaps we can add something smarter here,
180 * but for now just disabling the radio should do.
182 rt2x00lib_disable_radio(rt2x00dev
);
184 __clear_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
186 EXPORT_SYMBOL_GPL(rt2x00mac_stop
);
188 int rt2x00mac_add_interface(struct ieee80211_hw
*hw
,
189 struct ieee80211_if_init_conf
*conf
)
191 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
192 struct interface
*intf
= &rt2x00dev
->interface
;
194 /* FIXME: Beaconing is broken in rt2x00. */
195 if (conf
->type
== IEEE80211_IF_TYPE_IBSS
||
196 conf
->type
== IEEE80211_IF_TYPE_AP
) {
198 "rt2x00 does not support Adhoc or Master mode");
203 * Don't allow interfaces to be added while
204 * either the device has disappeared or when
205 * another interface is already present.
207 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
) ||
208 is_interface_present(intf
))
211 intf
->id
= conf
->if_id
;
212 intf
->type
= conf
->type
;
213 if (conf
->type
== IEEE80211_IF_TYPE_AP
)
214 memcpy(&intf
->bssid
, conf
->mac_addr
, ETH_ALEN
);
215 memcpy(&intf
->mac
, conf
->mac_addr
, ETH_ALEN
);
218 * The MAC adddress must be configured after the device
219 * has been initialized. Otherwise the device can reset
222 rt2x00lib_config_mac_addr(rt2x00dev
, intf
->mac
);
223 rt2x00lib_config_type(rt2x00dev
, conf
->type
);
227 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface
);
229 void rt2x00mac_remove_interface(struct ieee80211_hw
*hw
,
230 struct ieee80211_if_init_conf
*conf
)
232 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
233 struct interface
*intf
= &rt2x00dev
->interface
;
236 * Don't allow interfaces to be remove while
237 * either the device has disappeared or when
238 * no interface is present.
240 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
) ||
241 !is_interface_present(intf
))
245 intf
->type
= INVALID_INTERFACE
;
246 memset(&intf
->bssid
, 0x00, ETH_ALEN
);
247 memset(&intf
->mac
, 0x00, ETH_ALEN
);
250 * Make sure the bssid and mac address registers
251 * are cleared to prevent false ACKing of frames.
253 rt2x00lib_config_mac_addr(rt2x00dev
, intf
->mac
);
254 rt2x00lib_config_bssid(rt2x00dev
, intf
->bssid
);
255 rt2x00lib_config_type(rt2x00dev
, intf
->type
);
257 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface
);
259 int rt2x00mac_config(struct ieee80211_hw
*hw
, struct ieee80211_conf
*conf
)
261 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
264 * Mac80211 might be calling this function while we are trying
265 * to remove the device or perhaps suspending it.
267 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
))
271 * Check if we need to disable the radio,
272 * if this is not the case, at least the RX must be disabled.
274 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
)) {
275 if (!conf
->radio_enabled
)
276 rt2x00lib_disable_radio(rt2x00dev
);
278 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
281 rt2x00lib_config(rt2x00dev
, conf
, 0);
284 * Reenable RX only if the radio should be on.
286 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
287 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
288 else if (conf
->radio_enabled
)
289 return rt2x00lib_enable_radio(rt2x00dev
);
293 EXPORT_SYMBOL_GPL(rt2x00mac_config
);
295 int rt2x00mac_config_interface(struct ieee80211_hw
*hw
, int if_id
,
296 struct ieee80211_if_conf
*conf
)
298 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
299 struct interface
*intf
= &rt2x00dev
->interface
;
303 * Mac80211 might be calling this function while we are trying
304 * to remove the device or perhaps suspending it.
306 if (!test_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
))
310 * If the given type does not match the configured type,
311 * there has been a problem.
313 if (conf
->type
!= intf
->type
)
317 * If the interface does not work in master mode,
318 * then the bssid value in the interface structure
321 if (conf
->type
!= IEEE80211_IF_TYPE_AP
)
322 memcpy(&intf
->bssid
, conf
->bssid
, ETH_ALEN
);
323 rt2x00lib_config_bssid(rt2x00dev
, intf
->bssid
);
326 * We only need to initialize the beacon when master mode is enabled.
328 if (conf
->type
!= IEEE80211_IF_TYPE_AP
|| !conf
->beacon
)
331 status
= rt2x00dev
->ops
->hw
->beacon_update(rt2x00dev
->hw
,
333 conf
->beacon_control
);
335 dev_kfree_skb(conf
->beacon
);
339 EXPORT_SYMBOL_GPL(rt2x00mac_config_interface
);
341 int rt2x00mac_get_stats(struct ieee80211_hw
*hw
,
342 struct ieee80211_low_level_stats
*stats
)
344 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
347 * The dot11ACKFailureCount, dot11RTSFailureCount and
348 * dot11RTSSuccessCount are updated in interrupt time.
349 * dot11FCSErrorCount is updated in the link tuner.
351 memcpy(stats
, &rt2x00dev
->low_level_stats
, sizeof(*stats
));
355 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats
);
357 int rt2x00mac_get_tx_stats(struct ieee80211_hw
*hw
,
358 struct ieee80211_tx_queue_stats
*stats
)
360 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
363 for (i
= 0; i
< hw
->queues
; i
++)
364 memcpy(&stats
->data
[i
], &rt2x00dev
->tx
[i
].stats
,
365 sizeof(rt2x00dev
->tx
[i
].stats
));
369 EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats
);
371 void rt2x00mac_erp_ie_changed(struct ieee80211_hw
*hw
, u8 changes
,
372 int cts_protection
, int preamble
)
374 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
377 int ack_consume_time
;
381 * We only support changing preamble mode.
383 if (!(changes
& IEEE80211_ERP_CHANGE_PREAMBLE
))
386 short_preamble
= !preamble
;
387 preamble
= !!(preamble
) ? PREAMBLE
: SHORT_PREAMBLE
;
389 difs
= (hw
->conf
.flags
& IEEE80211_CONF_SHORT_SLOT_TIME
) ?
391 ack_timeout
= difs
+ PLCP
+ preamble
+ get_duration(ACK_SIZE
, 10);
393 ack_consume_time
= SIFS
+ PLCP
+ preamble
+ get_duration(ACK_SIZE
, 10);
396 __set_bit(CONFIG_SHORT_PREAMBLE
, &rt2x00dev
->flags
);
398 __clear_bit(CONFIG_SHORT_PREAMBLE
, &rt2x00dev
->flags
);
400 rt2x00dev
->ops
->lib
->config_preamble(rt2x00dev
, short_preamble
,
401 ack_timeout
, ack_consume_time
);
403 EXPORT_SYMBOL_GPL(rt2x00mac_erp_ie_changed
);
405 int rt2x00mac_conf_tx(struct ieee80211_hw
*hw
, int queue
,
406 const struct ieee80211_tx_queue_params
*params
)
408 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
409 struct data_ring
*ring
;
411 ring
= rt2x00lib_get_ring(rt2x00dev
, queue
);
416 * The passed variables are stored as real value ((2^n)-1).
417 * Ralink registers require to know the bit number 'n'.
420 ring
->tx_params
.cw_min
= fls(params
->cw_min
);
422 ring
->tx_params
.cw_min
= 5; /* cw_min: 2^5 = 32. */
425 ring
->tx_params
.cw_max
= fls(params
->cw_max
);
427 ring
->tx_params
.cw_max
= 10; /* cw_min: 2^10 = 1024. */
430 ring
->tx_params
.aifs
= params
->aifs
;
432 ring
->tx_params
.aifs
= 2;
435 "Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
436 queue
, ring
->tx_params
.cw_min
, ring
->tx_params
.cw_max
,
437 ring
->tx_params
.aifs
);
441 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx
);