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1 /*-
2  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3  * Copyright (c) 2004-2005 Atheros Communications, Inc.
4  * Copyright (c) 2006 Devicescape Software, Inc.
5  * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6  * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
7  *
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer,
15  *    without modification.
16  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
18  *    redistribution must be conditioned upon including a substantially
19  *    similar Disclaimer requirement for further binary redistribution.
20  * 3. Neither the names of the above-listed copyright holders nor the names
21  *    of any contributors may be used to endorse or promote products derived
22  *    from this software without specific prior written permission.
23  *
24  * Alternatively, this software may be distributed under the terms of the
25  * GNU General Public License ("GPL") version 2 as published by the Free
26  * Software Foundation.
27  *
28  * NO WARRANTY
29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
32  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
33  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
34  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
39  * THE POSSIBILITY OF SUCH DAMAGES.
40  *
41  */
42
43 #include <linux/module.h>
44 #include <linux/delay.h>
45 #include <linux/hardirq.h>
46 #include <linux/if.h>
47 #include <linux/io.h>
48 #include <linux/netdevice.h>
49 #include <linux/cache.h>
50 #include <linux/pci.h>
51 #include <linux/ethtool.h>
52 #include <linux/uaccess.h>
53
54 #include <net/ieee80211_radiotap.h>
55
56 #include <asm/unaligned.h>
57
58 #include "base.h"
59 #include "reg.h"
60 #include "debug.h"
61
62 static int ath5k_calinterval = 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */
63
64
65 /******************\
66 * Internal defines *
67 \******************/
68
69 /* Module info */
70 MODULE_AUTHOR("Jiri Slaby");
71 MODULE_AUTHOR("Nick Kossifidis");
72 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
73 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
74 MODULE_LICENSE("Dual BSD/GPL");
75 MODULE_VERSION("0.6.0 (EXPERIMENTAL)");
76
77
78 /* Known PCI ids */
79 static struct pci_device_id ath5k_pci_id_table[] __devinitdata = {
80         { PCI_VDEVICE(ATHEROS, 0x0207), .driver_data = AR5K_AR5210 }, /* 5210 early */
81         { PCI_VDEVICE(ATHEROS, 0x0007), .driver_data = AR5K_AR5210 }, /* 5210 */
82         { PCI_VDEVICE(ATHEROS, 0x0011), .driver_data = AR5K_AR5211 }, /* 5311 - this is on AHB bus !*/
83         { PCI_VDEVICE(ATHEROS, 0x0012), .driver_data = AR5K_AR5211 }, /* 5211 */
84         { PCI_VDEVICE(ATHEROS, 0x0013), .driver_data = AR5K_AR5212 }, /* 5212 */
85         { PCI_VDEVICE(3COM_2,  0x0013), .driver_data = AR5K_AR5212 }, /* 3com 5212 */
86         { PCI_VDEVICE(3COM,    0x0013), .driver_data = AR5K_AR5212 }, /* 3com 3CRDAG675 5212 */
87         { PCI_VDEVICE(ATHEROS, 0x1014), .driver_data = AR5K_AR5212 }, /* IBM minipci 5212 */
88         { PCI_VDEVICE(ATHEROS, 0x0014), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
89         { PCI_VDEVICE(ATHEROS, 0x0015), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
90         { PCI_VDEVICE(ATHEROS, 0x0016), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
91         { PCI_VDEVICE(ATHEROS, 0x0017), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
92         { PCI_VDEVICE(ATHEROS, 0x0018), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
93         { PCI_VDEVICE(ATHEROS, 0x0019), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
94         { PCI_VDEVICE(ATHEROS, 0x001a), .driver_data = AR5K_AR5212 }, /* 2413 Griffin-lite */
95         { PCI_VDEVICE(ATHEROS, 0x001b), .driver_data = AR5K_AR5212 }, /* 5413 Eagle */
96         { PCI_VDEVICE(ATHEROS, 0x001c), .driver_data = AR5K_AR5212 }, /* PCI-E cards */
97         { PCI_VDEVICE(ATHEROS, 0x001d), .driver_data = AR5K_AR5212 }, /* 2417 Nala */
98         { 0 }
99 };
100 MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
101
102 /* Known SREVs */
103 static struct ath5k_srev_name srev_names[] = {
104         { "5210",       AR5K_VERSION_MAC,       AR5K_SREV_AR5210 },
105         { "5311",       AR5K_VERSION_MAC,       AR5K_SREV_AR5311 },
106         { "5311A",      AR5K_VERSION_MAC,       AR5K_SREV_AR5311A },
107         { "5311B",      AR5K_VERSION_MAC,       AR5K_SREV_AR5311B },
108         { "5211",       AR5K_VERSION_MAC,       AR5K_SREV_AR5211 },
109         { "5212",       AR5K_VERSION_MAC,       AR5K_SREV_AR5212 },
110         { "5213",       AR5K_VERSION_MAC,       AR5K_SREV_AR5213 },
111         { "5213A",      AR5K_VERSION_MAC,       AR5K_SREV_AR5213A },
112         { "2413",       AR5K_VERSION_MAC,       AR5K_SREV_AR2413 },
113         { "2414",       AR5K_VERSION_MAC,       AR5K_SREV_AR2414 },
114         { "5424",       AR5K_VERSION_MAC,       AR5K_SREV_AR5424 },
115         { "5413",       AR5K_VERSION_MAC,       AR5K_SREV_AR5413 },
116         { "5414",       AR5K_VERSION_MAC,       AR5K_SREV_AR5414 },
117         { "2415",       AR5K_VERSION_MAC,       AR5K_SREV_AR2415 },
118         { "5416",       AR5K_VERSION_MAC,       AR5K_SREV_AR5416 },
119         { "5418",       AR5K_VERSION_MAC,       AR5K_SREV_AR5418 },
120         { "2425",       AR5K_VERSION_MAC,       AR5K_SREV_AR2425 },
121         { "2417",       AR5K_VERSION_MAC,       AR5K_SREV_AR2417 },
122         { "xxxxx",      AR5K_VERSION_MAC,       AR5K_SREV_UNKNOWN },
123         { "5110",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5110 },
124         { "5111",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5111 },
125         { "5111A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5111A },
126         { "2111",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2111 },
127         { "5112",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112 },
128         { "5112A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112A },
129         { "5112B",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112B },
130         { "2112",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112 },
131         { "2112A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112A },
132         { "2112B",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112B },
133         { "2413",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2413 },
134         { "5413",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5413 },
135         { "2316",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2316 },
136         { "2317",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2317 },
137         { "5424",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5424 },
138         { "5133",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5133 },
139         { "xxxxx",      AR5K_VERSION_RAD,       AR5K_SREV_UNKNOWN },
140 };
141
142 static struct ieee80211_rate ath5k_rates[] = {
143         { .bitrate = 10,
144           .hw_value = ATH5K_RATE_CODE_1M, },
145         { .bitrate = 20,
146           .hw_value = ATH5K_RATE_CODE_2M,
147           .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
148           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
149         { .bitrate = 55,
150           .hw_value = ATH5K_RATE_CODE_5_5M,
151           .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
152           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
153         { .bitrate = 110,
154           .hw_value = ATH5K_RATE_CODE_11M,
155           .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
156           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
157         { .bitrate = 60,
158           .hw_value = ATH5K_RATE_CODE_6M,
159           .flags = 0 },
160         { .bitrate = 90,
161           .hw_value = ATH5K_RATE_CODE_9M,
162           .flags = 0 },
163         { .bitrate = 120,
164           .hw_value = ATH5K_RATE_CODE_12M,
165           .flags = 0 },
166         { .bitrate = 180,
167           .hw_value = ATH5K_RATE_CODE_18M,
168           .flags = 0 },
169         { .bitrate = 240,
170           .hw_value = ATH5K_RATE_CODE_24M,
171           .flags = 0 },
172         { .bitrate = 360,
173           .hw_value = ATH5K_RATE_CODE_36M,
174           .flags = 0 },
175         { .bitrate = 480,
176           .hw_value = ATH5K_RATE_CODE_48M,
177           .flags = 0 },
178         { .bitrate = 540,
179           .hw_value = ATH5K_RATE_CODE_54M,
180           .flags = 0 },
181         /* XR missing */
182 };
183
184 /*
185  * Prototypes - PCI stack related functions
186  */
187 static int __devinit    ath5k_pci_probe(struct pci_dev *pdev,
188                                 const struct pci_device_id *id);
189 static void __devexit   ath5k_pci_remove(struct pci_dev *pdev);
190 #ifdef CONFIG_PM
191 static int              ath5k_pci_suspend(struct pci_dev *pdev,
192                                         pm_message_t state);
193 static int              ath5k_pci_resume(struct pci_dev *pdev);
194 #else
195 #define ath5k_pci_suspend NULL
196 #define ath5k_pci_resume NULL
197 #endif /* CONFIG_PM */
198
199 static struct pci_driver ath5k_pci_driver = {
200         .name           = "ath5k_pci",
201         .id_table       = ath5k_pci_id_table,
202         .probe          = ath5k_pci_probe,
203         .remove         = __devexit_p(ath5k_pci_remove),
204         .suspend        = ath5k_pci_suspend,
205         .resume         = ath5k_pci_resume,
206 };
207
208
209
210 /*
211  * Prototypes - MAC 802.11 stack related functions
212  */
213 static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
214 static int ath5k_reset(struct ath5k_softc *sc, bool stop, bool change_channel);
215 static int ath5k_reset_wake(struct ath5k_softc *sc);
216 static int ath5k_start(struct ieee80211_hw *hw);
217 static void ath5k_stop(struct ieee80211_hw *hw);
218 static int ath5k_add_interface(struct ieee80211_hw *hw,
219                 struct ieee80211_if_init_conf *conf);
220 static void ath5k_remove_interface(struct ieee80211_hw *hw,
221                 struct ieee80211_if_init_conf *conf);
222 static int ath5k_config(struct ieee80211_hw *hw,
223                 struct ieee80211_conf *conf);
224 static int ath5k_config_interface(struct ieee80211_hw *hw,
225                 struct ieee80211_vif *vif,
226                 struct ieee80211_if_conf *conf);
227 static void ath5k_configure_filter(struct ieee80211_hw *hw,
228                 unsigned int changed_flags,
229                 unsigned int *new_flags,
230                 int mc_count, struct dev_mc_list *mclist);
231 static int ath5k_set_key(struct ieee80211_hw *hw,
232                 enum set_key_cmd cmd,
233                 const u8 *local_addr, const u8 *addr,
234                 struct ieee80211_key_conf *key);
235 static int ath5k_get_stats(struct ieee80211_hw *hw,
236                 struct ieee80211_low_level_stats *stats);
237 static int ath5k_get_tx_stats(struct ieee80211_hw *hw,
238                 struct ieee80211_tx_queue_stats *stats);
239 static u64 ath5k_get_tsf(struct ieee80211_hw *hw);
240 static void ath5k_reset_tsf(struct ieee80211_hw *hw);
241 static int ath5k_beacon_update(struct ieee80211_hw *hw,
242                 struct sk_buff *skb);
243
244 static struct ieee80211_ops ath5k_hw_ops = {
245         .tx             = ath5k_tx,
246         .start          = ath5k_start,
247         .stop           = ath5k_stop,
248         .add_interface  = ath5k_add_interface,
249         .remove_interface = ath5k_remove_interface,
250         .config         = ath5k_config,
251         .config_interface = ath5k_config_interface,
252         .configure_filter = ath5k_configure_filter,
253         .set_key        = ath5k_set_key,
254         .get_stats      = ath5k_get_stats,
255         .conf_tx        = NULL,
256         .get_tx_stats   = ath5k_get_tx_stats,
257         .get_tsf        = ath5k_get_tsf,
258         .reset_tsf      = ath5k_reset_tsf,
259 };
260
261 /*
262  * Prototypes - Internal functions
263  */
264 /* Attach detach */
265 static int      ath5k_attach(struct pci_dev *pdev,
266                         struct ieee80211_hw *hw);
267 static void     ath5k_detach(struct pci_dev *pdev,
268                         struct ieee80211_hw *hw);
269 /* Channel/mode setup */
270 static inline short ath5k_ieee2mhz(short chan);
271 static unsigned int ath5k_copy_channels(struct ath5k_hw *ah,
272                                 struct ieee80211_channel *channels,
273                                 unsigned int mode,
274                                 unsigned int max);
275 static int      ath5k_setup_bands(struct ieee80211_hw *hw);
276 static int      ath5k_chan_set(struct ath5k_softc *sc,
277                                 struct ieee80211_channel *chan);
278 static void     ath5k_setcurmode(struct ath5k_softc *sc,
279                                 unsigned int mode);
280 static void     ath5k_mode_setup(struct ath5k_softc *sc);
281
282 /* Descriptor setup */
283 static int      ath5k_desc_alloc(struct ath5k_softc *sc,
284                                 struct pci_dev *pdev);
285 static void     ath5k_desc_free(struct ath5k_softc *sc,
286                                 struct pci_dev *pdev);
287 /* Buffers setup */
288 static int      ath5k_rxbuf_setup(struct ath5k_softc *sc,
289                                 struct ath5k_buf *bf);
290 static int      ath5k_txbuf_setup(struct ath5k_softc *sc,
291                                 struct ath5k_buf *bf);
292 static inline void ath5k_txbuf_free(struct ath5k_softc *sc,
293                                 struct ath5k_buf *bf)
294 {
295         BUG_ON(!bf);
296         if (!bf->skb)
297                 return;
298         pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
299                         PCI_DMA_TODEVICE);
300         dev_kfree_skb_any(bf->skb);
301         bf->skb = NULL;
302 }
303
304 /* Queues setup */
305 static struct   ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
306                                 int qtype, int subtype);
307 static int      ath5k_beaconq_setup(struct ath5k_hw *ah);
308 static int      ath5k_beaconq_config(struct ath5k_softc *sc);
309 static void     ath5k_txq_drainq(struct ath5k_softc *sc,
310                                 struct ath5k_txq *txq);
311 static void     ath5k_txq_cleanup(struct ath5k_softc *sc);
312 static void     ath5k_txq_release(struct ath5k_softc *sc);
313 /* Rx handling */
314 static int      ath5k_rx_start(struct ath5k_softc *sc);
315 static void     ath5k_rx_stop(struct ath5k_softc *sc);
316 static unsigned int ath5k_rx_decrypted(struct ath5k_softc *sc,
317                                         struct ath5k_desc *ds,
318                                         struct sk_buff *skb,
319                                         struct ath5k_rx_status *rs);
320 static void     ath5k_tasklet_rx(unsigned long data);
321 /* Tx handling */
322 static void     ath5k_tx_processq(struct ath5k_softc *sc,
323                                 struct ath5k_txq *txq);
324 static void     ath5k_tasklet_tx(unsigned long data);
325 /* Beacon handling */
326 static int      ath5k_beacon_setup(struct ath5k_softc *sc,
327                                         struct ath5k_buf *bf);
328 static void     ath5k_beacon_send(struct ath5k_softc *sc);
329 static void     ath5k_beacon_config(struct ath5k_softc *sc);
330 static void     ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
331
332 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
333 {
334         u64 tsf = ath5k_hw_get_tsf64(ah);
335
336         if ((tsf & 0x7fff) < rstamp)
337                 tsf -= 0x8000;
338
339         return (tsf & ~0x7fff) | rstamp;
340 }
341
342 /* Interrupt handling */
343 static int      ath5k_init(struct ath5k_softc *sc, bool is_resume);
344 static int      ath5k_stop_locked(struct ath5k_softc *sc);
345 static int      ath5k_stop_hw(struct ath5k_softc *sc, bool is_suspend);
346 static irqreturn_t ath5k_intr(int irq, void *dev_id);
347 static void     ath5k_tasklet_reset(unsigned long data);
348
349 static void     ath5k_calibrate(unsigned long data);
350 /* LED functions */
351 static int      ath5k_init_leds(struct ath5k_softc *sc);
352 static void     ath5k_led_enable(struct ath5k_softc *sc);
353 static void     ath5k_led_off(struct ath5k_softc *sc);
354 static void     ath5k_unregister_leds(struct ath5k_softc *sc);
355
356 /*
357  * Module init/exit functions
358  */
359 static int __init
360 init_ath5k_pci(void)
361 {
362         int ret;
363
364         ath5k_debug_init();
365
366         ret = pci_register_driver(&ath5k_pci_driver);
367         if (ret) {
368                 printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
369                 return ret;
370         }
371
372         return 0;
373 }
374
375 static void __exit
376 exit_ath5k_pci(void)
377 {
378         pci_unregister_driver(&ath5k_pci_driver);
379
380         ath5k_debug_finish();
381 }
382
383 module_init(init_ath5k_pci);
384 module_exit(exit_ath5k_pci);
385
386
387 /********************\
388 * PCI Initialization *
389 \********************/
390
391 static const char *
392 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
393 {
394         const char *name = "xxxxx";
395         unsigned int i;
396
397         for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
398                 if (srev_names[i].sr_type != type)
399                         continue;
400
401                 if ((val & 0xf0) == srev_names[i].sr_val)
402                         name = srev_names[i].sr_name;
403
404                 if ((val & 0xff) == srev_names[i].sr_val) {
405                         name = srev_names[i].sr_name;
406                         break;
407                 }
408         }
409
410         return name;
411 }
412
413 static int __devinit
414 ath5k_pci_probe(struct pci_dev *pdev,
415                 const struct pci_device_id *id)
416 {
417         void __iomem *mem;
418         struct ath5k_softc *sc;
419         struct ieee80211_hw *hw;
420         int ret;
421         u8 csz;
422
423         ret = pci_enable_device(pdev);
424         if (ret) {
425                 dev_err(&pdev->dev, "can't enable device\n");
426                 goto err;
427         }
428
429         /* XXX 32-bit addressing only */
430         ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
431         if (ret) {
432                 dev_err(&pdev->dev, "32-bit DMA not available\n");
433                 goto err_dis;
434         }
435
436         /*
437          * Cache line size is used to size and align various
438          * structures used to communicate with the hardware.
439          */
440         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
441         if (csz == 0) {
442                 /*
443                  * Linux 2.4.18 (at least) writes the cache line size
444                  * register as a 16-bit wide register which is wrong.
445                  * We must have this setup properly for rx buffer
446                  * DMA to work so force a reasonable value here if it
447                  * comes up zero.
448                  */
449                 csz = L1_CACHE_BYTES / sizeof(u32);
450                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
451         }
452         /*
453          * The default setting of latency timer yields poor results,
454          * set it to the value used by other systems.  It may be worth
455          * tweaking this setting more.
456          */
457         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
458
459         /* Enable bus mastering */
460         pci_set_master(pdev);
461
462         /*
463          * Disable the RETRY_TIMEOUT register (0x41) to keep
464          * PCI Tx retries from interfering with C3 CPU state.
465          */
466         pci_write_config_byte(pdev, 0x41, 0);
467
468         ret = pci_request_region(pdev, 0, "ath5k");
469         if (ret) {
470                 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
471                 goto err_dis;
472         }
473
474         mem = pci_iomap(pdev, 0, 0);
475         if (!mem) {
476                 dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
477                 ret = -EIO;
478                 goto err_reg;
479         }
480
481         /*
482          * Allocate hw (mac80211 main struct)
483          * and hw->priv (driver private data)
484          */
485         hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
486         if (hw == NULL) {
487                 dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
488                 ret = -ENOMEM;
489                 goto err_map;
490         }
491
492         dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
493
494         /* Initialize driver private data */
495         SET_IEEE80211_DEV(hw, &pdev->dev);
496         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
497                     IEEE80211_HW_SIGNAL_DBM |
498                     IEEE80211_HW_NOISE_DBM;
499
500         hw->wiphy->interface_modes =
501                 BIT(NL80211_IFTYPE_STATION) |
502                 BIT(NL80211_IFTYPE_ADHOC) |
503                 BIT(NL80211_IFTYPE_MESH_POINT);
504
505         hw->extra_tx_headroom = 2;
506         hw->channel_change_time = 5000;
507         sc = hw->priv;
508         sc->hw = hw;
509         sc->pdev = pdev;
510
511         ath5k_debug_init_device(sc);
512
513         /*
514          * Mark the device as detached to avoid processing
515          * interrupts until setup is complete.
516          */
517         __set_bit(ATH_STAT_INVALID, sc->status);
518
519         sc->iobase = mem; /* So we can unmap it on detach */
520         sc->cachelsz = csz * sizeof(u32); /* convert to bytes */
521         sc->opmode = NL80211_IFTYPE_STATION;
522         mutex_init(&sc->lock);
523         spin_lock_init(&sc->rxbuflock);
524         spin_lock_init(&sc->txbuflock);
525         spin_lock_init(&sc->block);
526
527         /* Set private data */
528         pci_set_drvdata(pdev, hw);
529
530         /* Setup interrupt handler */
531         ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
532         if (ret) {
533                 ATH5K_ERR(sc, "request_irq failed\n");
534                 goto err_free;
535         }
536
537         /* Initialize device */
538         sc->ah = ath5k_hw_attach(sc, id->driver_data);
539         if (IS_ERR(sc->ah)) {
540                 ret = PTR_ERR(sc->ah);
541                 goto err_irq;
542         }
543
544         /* set up multi-rate retry capabilities */
545         if (sc->ah->ah_version == AR5K_AR5212) {
546                 hw->max_altrates = 3;
547                 hw->max_altrate_tries = 11;
548         }
549
550         /* Finish private driver data initialization */
551         ret = ath5k_attach(pdev, hw);
552         if (ret)
553                 goto err_ah;
554
555         ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
556                         ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
557                                         sc->ah->ah_mac_srev,
558                                         sc->ah->ah_phy_revision);
559
560         if (!sc->ah->ah_single_chip) {
561                 /* Single chip radio (!RF5111) */
562                 if (sc->ah->ah_radio_5ghz_revision &&
563                         !sc->ah->ah_radio_2ghz_revision) {
564                         /* No 5GHz support -> report 2GHz radio */
565                         if (!test_bit(AR5K_MODE_11A,
566                                 sc->ah->ah_capabilities.cap_mode)) {
567                                 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
568                                         ath5k_chip_name(AR5K_VERSION_RAD,
569                                                 sc->ah->ah_radio_5ghz_revision),
570                                                 sc->ah->ah_radio_5ghz_revision);
571                         /* No 2GHz support (5110 and some
572                          * 5Ghz only cards) -> report 5Ghz radio */
573                         } else if (!test_bit(AR5K_MODE_11B,
574                                 sc->ah->ah_capabilities.cap_mode)) {
575                                 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
576                                         ath5k_chip_name(AR5K_VERSION_RAD,
577                                                 sc->ah->ah_radio_5ghz_revision),
578                                                 sc->ah->ah_radio_5ghz_revision);
579                         /* Multiband radio */
580                         } else {
581                                 ATH5K_INFO(sc, "RF%s multiband radio found"
582                                         " (0x%x)\n",
583                                         ath5k_chip_name(AR5K_VERSION_RAD,
584                                                 sc->ah->ah_radio_5ghz_revision),
585                                                 sc->ah->ah_radio_5ghz_revision);
586                         }
587                 }
588                 /* Multi chip radio (RF5111 - RF2111) ->
589                  * report both 2GHz/5GHz radios */
590                 else if (sc->ah->ah_radio_5ghz_revision &&
591                                 sc->ah->ah_radio_2ghz_revision){
592                         ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
593                                 ath5k_chip_name(AR5K_VERSION_RAD,
594                                         sc->ah->ah_radio_5ghz_revision),
595                                         sc->ah->ah_radio_5ghz_revision);
596                         ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
597                                 ath5k_chip_name(AR5K_VERSION_RAD,
598                                         sc->ah->ah_radio_2ghz_revision),
599                                         sc->ah->ah_radio_2ghz_revision);
600                 }
601         }
602
603
604         /* ready to process interrupts */
605         __clear_bit(ATH_STAT_INVALID, sc->status);
606
607         return 0;
608 err_ah:
609         ath5k_hw_detach(sc->ah);
610 err_irq:
611         free_irq(pdev->irq, sc);
612 err_free:
613         ieee80211_free_hw(hw);
614 err_map:
615         pci_iounmap(pdev, mem);
616 err_reg:
617         pci_release_region(pdev, 0);
618 err_dis:
619         pci_disable_device(pdev);
620 err:
621         return ret;
622 }
623
624 static void __devexit
625 ath5k_pci_remove(struct pci_dev *pdev)
626 {
627         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
628         struct ath5k_softc *sc = hw->priv;
629
630         ath5k_debug_finish_device(sc);
631         ath5k_detach(pdev, hw);
632         ath5k_hw_detach(sc->ah);
633         free_irq(pdev->irq, sc);
634         pci_iounmap(pdev, sc->iobase);
635         pci_release_region(pdev, 0);
636         pci_disable_device(pdev);
637         ieee80211_free_hw(hw);
638 }
639
640 #ifdef CONFIG_PM
641 static int
642 ath5k_pci_suspend(struct pci_dev *pdev, pm_message_t state)
643 {
644         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
645         struct ath5k_softc *sc = hw->priv;
646
647         ath5k_led_off(sc);
648
649         ath5k_stop_hw(sc, true);
650
651         free_irq(pdev->irq, sc);
652         pci_save_state(pdev);
653         pci_disable_device(pdev);
654         pci_set_power_state(pdev, PCI_D3hot);
655
656         return 0;
657 }
658
659 static int
660 ath5k_pci_resume(struct pci_dev *pdev)
661 {
662         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
663         struct ath5k_softc *sc = hw->priv;
664         struct ath5k_hw *ah = sc->ah;
665         int i, err;
666
667         pci_restore_state(pdev);
668
669         err = pci_enable_device(pdev);
670         if (err)
671                 return err;
672
673         /*
674          * Suspend/Resume resets the PCI configuration space, so we have to
675          * re-disable the RETRY_TIMEOUT register (0x41) to keep
676          * PCI Tx retries from interfering with C3 CPU state
677          */
678         pci_write_config_byte(pdev, 0x41, 0);
679
680         err = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
681         if (err) {
682                 ATH5K_ERR(sc, "request_irq failed\n");
683                 goto err_no_irq;
684         }
685
686         err = ath5k_init(sc, true);
687         if (err)
688                 goto err_irq;
689         ath5k_led_enable(sc);
690
691         /*
692          * Reset the key cache since some parts do not
693          * reset the contents on initial power up or resume.
694          *
695          * FIXME: This may need to be revisited when mac80211 becomes
696          *        aware of suspend/resume.
697          */
698         for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
699                 ath5k_hw_reset_key(ah, i);
700
701         return 0;
702 err_irq:
703         free_irq(pdev->irq, sc);
704 err_no_irq:
705         pci_disable_device(pdev);
706         return err;
707 }
708 #endif /* CONFIG_PM */
709
710
711 /***********************\
712 * Driver Initialization *
713 \***********************/
714
715 static int
716 ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
717 {
718         struct ath5k_softc *sc = hw->priv;
719         struct ath5k_hw *ah = sc->ah;
720         u8 mac[ETH_ALEN];
721         unsigned int i;
722         int ret;
723
724         ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
725
726         /*
727          * Check if the MAC has multi-rate retry support.
728          * We do this by trying to setup a fake extended
729          * descriptor.  MAC's that don't have support will
730          * return false w/o doing anything.  MAC's that do
731          * support it will return true w/o doing anything.
732          */
733         ret = ah->ah_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
734         if (ret < 0)
735                 goto err;
736         if (ret > 0)
737                 __set_bit(ATH_STAT_MRRETRY, sc->status);
738
739         /*
740          * Reset the key cache since some parts do not
741          * reset the contents on initial power up.
742          */
743         for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
744                 ath5k_hw_reset_key(ah, i);
745
746         /*
747          * Collect the channel list.  The 802.11 layer
748          * is resposible for filtering this list based
749          * on settings like the phy mode and regulatory
750          * domain restrictions.
751          */
752         ret = ath5k_setup_bands(hw);
753         if (ret) {
754                 ATH5K_ERR(sc, "can't get channels\n");
755                 goto err;
756         }
757
758         /* NB: setup here so ath5k_rate_update is happy */
759         if (test_bit(AR5K_MODE_11A, ah->ah_modes))
760                 ath5k_setcurmode(sc, AR5K_MODE_11A);
761         else
762                 ath5k_setcurmode(sc, AR5K_MODE_11B);
763
764         /*
765          * Allocate tx+rx descriptors and populate the lists.
766          */
767         ret = ath5k_desc_alloc(sc, pdev);
768         if (ret) {
769                 ATH5K_ERR(sc, "can't allocate descriptors\n");
770                 goto err;
771         }
772
773         /*
774          * Allocate hardware transmit queues: one queue for
775          * beacon frames and one data queue for each QoS
776          * priority.  Note that hw functions handle reseting
777          * these queues at the needed time.
778          */
779         ret = ath5k_beaconq_setup(ah);
780         if (ret < 0) {
781                 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
782                 goto err_desc;
783         }
784         sc->bhalq = ret;
785
786         sc->txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
787         if (IS_ERR(sc->txq)) {
788                 ATH5K_ERR(sc, "can't setup xmit queue\n");
789                 ret = PTR_ERR(sc->txq);
790                 goto err_bhal;
791         }
792
793         tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
794         tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
795         tasklet_init(&sc->restq, ath5k_tasklet_reset, (unsigned long)sc);
796         setup_timer(&sc->calib_tim, ath5k_calibrate, (unsigned long)sc);
797
798         ath5k_hw_get_lladdr(ah, mac);
799         SET_IEEE80211_PERM_ADDR(hw, mac);
800         /* All MAC address bits matter for ACKs */
801         memset(sc->bssidmask, 0xff, ETH_ALEN);
802         ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
803
804         ret = ieee80211_register_hw(hw);
805         if (ret) {
806                 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
807                 goto err_queues;
808         }
809
810         ath5k_init_leds(sc);
811
812         return 0;
813 err_queues:
814         ath5k_txq_release(sc);
815 err_bhal:
816         ath5k_hw_release_tx_queue(ah, sc->bhalq);
817 err_desc:
818         ath5k_desc_free(sc, pdev);
819 err:
820         return ret;
821 }
822
823 static void
824 ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
825 {
826         struct ath5k_softc *sc = hw->priv;
827
828         /*
829          * NB: the order of these is important:
830          * o call the 802.11 layer before detaching ath5k_hw to
831          *   insure callbacks into the driver to delete global
832          *   key cache entries can be handled
833          * o reclaim the tx queue data structures after calling
834          *   the 802.11 layer as we'll get called back to reclaim
835          *   node state and potentially want to use them
836          * o to cleanup the tx queues the hal is called, so detach
837          *   it last
838          * XXX: ??? detach ath5k_hw ???
839          * Other than that, it's straightforward...
840          */
841         ieee80211_unregister_hw(hw);
842         ath5k_desc_free(sc, pdev);
843         ath5k_txq_release(sc);
844         ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
845         ath5k_unregister_leds(sc);
846
847         /*
848          * NB: can't reclaim these until after ieee80211_ifdetach
849          * returns because we'll get called back to reclaim node
850          * state and potentially want to use them.
851          */
852 }
853
854
855
856
857 /********************\
858 * Channel/mode setup *
859 \********************/
860
861 /*
862  * Convert IEEE channel number to MHz frequency.
863  */
864 static inline short
865 ath5k_ieee2mhz(short chan)
866 {
867         if (chan <= 14 || chan >= 27)
868                 return ieee80211chan2mhz(chan);
869         else
870                 return 2212 + chan * 20;
871 }
872
873 static unsigned int
874 ath5k_copy_channels(struct ath5k_hw *ah,
875                 struct ieee80211_channel *channels,
876                 unsigned int mode,
877                 unsigned int max)
878 {
879         unsigned int i, count, size, chfreq, freq, ch;
880
881         if (!test_bit(mode, ah->ah_modes))
882                 return 0;
883
884         switch (mode) {
885         case AR5K_MODE_11A:
886         case AR5K_MODE_11A_TURBO:
887                 /* 1..220, but 2GHz frequencies are filtered by check_channel */
888                 size = 220 ;
889                 chfreq = CHANNEL_5GHZ;
890                 break;
891         case AR5K_MODE_11B:
892         case AR5K_MODE_11G:
893         case AR5K_MODE_11G_TURBO:
894                 size = 26;
895                 chfreq = CHANNEL_2GHZ;
896                 break;
897         default:
898                 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
899                 return 0;
900         }
901
902         for (i = 0, count = 0; i < size && max > 0; i++) {
903                 ch = i + 1 ;
904                 freq = ath5k_ieee2mhz(ch);
905
906                 /* Check if channel is supported by the chipset */
907                 if (!ath5k_channel_ok(ah, freq, chfreq))
908                         continue;
909
910                 /* Write channel info and increment counter */
911                 channels[count].center_freq = freq;
912                 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
913                         IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
914                 switch (mode) {
915                 case AR5K_MODE_11A:
916                 case AR5K_MODE_11G:
917                         channels[count].hw_value = chfreq | CHANNEL_OFDM;
918                         break;
919                 case AR5K_MODE_11A_TURBO:
920                 case AR5K_MODE_11G_TURBO:
921                         channels[count].hw_value = chfreq |
922                                 CHANNEL_OFDM | CHANNEL_TURBO;
923                         break;
924                 case AR5K_MODE_11B:
925                         channels[count].hw_value = CHANNEL_B;
926                 }
927
928                 count++;
929                 max--;
930         }
931
932         return count;
933 }
934
935 static void
936 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
937 {
938         u8 i;
939
940         for (i = 0; i < AR5K_MAX_RATES; i++)
941                 sc->rate_idx[b->band][i] = -1;
942
943         for (i = 0; i < b->n_bitrates; i++) {
944                 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
945                 if (b->bitrates[i].hw_value_short)
946                         sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
947         }
948 }
949
950 static int
951 ath5k_setup_bands(struct ieee80211_hw *hw)
952 {
953         struct ath5k_softc *sc = hw->priv;
954         struct ath5k_hw *ah = sc->ah;
955         struct ieee80211_supported_band *sband;
956         int max_c, count_c = 0;
957         int i;
958
959         BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
960         max_c = ARRAY_SIZE(sc->channels);
961
962         /* 2GHz band */
963         sband = &sc->sbands[IEEE80211_BAND_2GHZ];
964         sband->band = IEEE80211_BAND_2GHZ;
965         sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
966
967         if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
968                 /* G mode */
969                 memcpy(sband->bitrates, &ath5k_rates[0],
970                        sizeof(struct ieee80211_rate) * 12);
971                 sband->n_bitrates = 12;
972
973                 sband->channels = sc->channels;
974                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
975                                         AR5K_MODE_11G, max_c);
976
977                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
978                 count_c = sband->n_channels;
979                 max_c -= count_c;
980         } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
981                 /* B mode */
982                 memcpy(sband->bitrates, &ath5k_rates[0],
983                        sizeof(struct ieee80211_rate) * 4);
984                 sband->n_bitrates = 4;
985
986                 /* 5211 only supports B rates and uses 4bit rate codes
987                  * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
988                  * fix them up here:
989                  */
990                 if (ah->ah_version == AR5K_AR5211) {
991                         for (i = 0; i < 4; i++) {
992                                 sband->bitrates[i].hw_value =
993                                         sband->bitrates[i].hw_value & 0xF;
994                                 sband->bitrates[i].hw_value_short =
995                                         sband->bitrates[i].hw_value_short & 0xF;
996                         }
997                 }
998
999                 sband->channels = sc->channels;
1000                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1001                                         AR5K_MODE_11B, max_c);
1002
1003                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
1004                 count_c = sband->n_channels;
1005                 max_c -= count_c;
1006         }
1007         ath5k_setup_rate_idx(sc, sband);
1008
1009         /* 5GHz band, A mode */
1010         if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
1011                 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
1012                 sband->band = IEEE80211_BAND_5GHZ;
1013                 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
1014
1015                 memcpy(sband->bitrates, &ath5k_rates[4],
1016                        sizeof(struct ieee80211_rate) * 8);
1017                 sband->n_bitrates = 8;
1018
1019                 sband->channels = &sc->channels[count_c];
1020                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1021                                         AR5K_MODE_11A, max_c);
1022
1023                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
1024         }
1025         ath5k_setup_rate_idx(sc, sband);
1026
1027         ath5k_debug_dump_bands(sc);
1028
1029         return 0;
1030 }
1031
1032 /*
1033  * Set/change channels.  If the channel is really being changed,
1034  * it's done by reseting the chip.  To accomplish this we must
1035  * first cleanup any pending DMA, then restart stuff after a la
1036  * ath5k_init.
1037  */
1038 static int
1039 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
1040 {
1041         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "(%u MHz) -> (%u MHz)\n",
1042                 sc->curchan->center_freq, chan->center_freq);
1043
1044         if (chan->center_freq != sc->curchan->center_freq ||
1045                 chan->hw_value != sc->curchan->hw_value) {
1046
1047                 sc->curchan = chan;
1048                 sc->curband = &sc->sbands[chan->band];
1049
1050                 /*
1051                  * To switch channels clear any pending DMA operations;
1052                  * wait long enough for the RX fifo to drain, reset the
1053                  * hardware at the new frequency, and then re-enable
1054                  * the relevant bits of the h/w.
1055                  */
1056                 return ath5k_reset(sc, true, true);
1057         }
1058
1059         return 0;
1060 }
1061
1062 static void
1063 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
1064 {
1065         sc->curmode = mode;
1066
1067         if (mode == AR5K_MODE_11A) {
1068                 sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
1069         } else {
1070                 sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
1071         }
1072 }
1073
1074 static void
1075 ath5k_mode_setup(struct ath5k_softc *sc)
1076 {
1077         struct ath5k_hw *ah = sc->ah;
1078         u32 rfilt;
1079
1080         /* configure rx filter */
1081         rfilt = sc->filter_flags;
1082         ath5k_hw_set_rx_filter(ah, rfilt);
1083
1084         if (ath5k_hw_hasbssidmask(ah))
1085                 ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
1086
1087         /* configure operational mode */
1088         ath5k_hw_set_opmode(ah);
1089
1090         ath5k_hw_set_mcast_filter(ah, 0, 0);
1091         ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
1092 }
1093
1094 static inline int
1095 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
1096 {
1097         WARN_ON(hw_rix < 0 || hw_rix > AR5K_MAX_RATES);
1098         return sc->rate_idx[sc->curband->band][hw_rix];
1099 }
1100
1101 /***************\
1102 * Buffers setup *
1103 \***************/
1104
1105 static int
1106 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1107 {
1108         struct ath5k_hw *ah = sc->ah;
1109         struct sk_buff *skb = bf->skb;
1110         struct ath5k_desc *ds;
1111
1112         if (likely(skb == NULL)) {
1113                 unsigned int off;
1114
1115                 /*
1116                  * Allocate buffer with headroom_needed space for the
1117                  * fake physical layer header at the start.
1118                  */
1119                 skb = dev_alloc_skb(sc->rxbufsize + sc->cachelsz - 1);
1120                 if (unlikely(skb == NULL)) {
1121                         ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
1122                                         sc->rxbufsize + sc->cachelsz - 1);
1123                         return -ENOMEM;
1124                 }
1125                 /*
1126                  * Cache-line-align.  This is important (for the
1127                  * 5210 at least) as not doing so causes bogus data
1128                  * in rx'd frames.
1129                  */
1130                 off = ((unsigned long)skb->data) % sc->cachelsz;
1131                 if (off != 0)
1132                         skb_reserve(skb, sc->cachelsz - off);
1133
1134                 bf->skb = skb;
1135                 bf->skbaddr = pci_map_single(sc->pdev,
1136                         skb->data, sc->rxbufsize, PCI_DMA_FROMDEVICE);
1137                 if (unlikely(pci_dma_mapping_error(sc->pdev, bf->skbaddr))) {
1138                         ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
1139                         dev_kfree_skb(skb);
1140                         bf->skb = NULL;
1141                         return -ENOMEM;
1142                 }
1143         }
1144
1145         /*
1146          * Setup descriptors.  For receive we always terminate
1147          * the descriptor list with a self-linked entry so we'll
1148          * not get overrun under high load (as can happen with a
1149          * 5212 when ANI processing enables PHY error frames).
1150          *
1151          * To insure the last descriptor is self-linked we create
1152          * each descriptor as self-linked and add it to the end.  As
1153          * each additional descriptor is added the previous self-linked
1154          * entry is ``fixed'' naturally.  This should be safe even
1155          * if DMA is happening.  When processing RX interrupts we
1156          * never remove/process the last, self-linked, entry on the
1157          * descriptor list.  This insures the hardware always has
1158          * someplace to write a new frame.
1159          */
1160         ds = bf->desc;
1161         ds->ds_link = bf->daddr;        /* link to self */
1162         ds->ds_data = bf->skbaddr;
1163         ah->ah_setup_rx_desc(ah, ds,
1164                 skb_tailroom(skb),      /* buffer size */
1165                 0);
1166
1167         if (sc->rxlink != NULL)
1168                 *sc->rxlink = bf->daddr;
1169         sc->rxlink = &ds->ds_link;
1170         return 0;
1171 }
1172
1173 static int
1174 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1175 {
1176         struct ath5k_hw *ah = sc->ah;
1177         struct ath5k_txq *txq = sc->txq;
1178         struct ath5k_desc *ds = bf->desc;
1179         struct sk_buff *skb = bf->skb;
1180         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1181         unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
1182         struct ieee80211_rate *rate;
1183         unsigned int mrr_rate[3], mrr_tries[3];
1184         int i, ret;
1185
1186         flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
1187
1188         /* XXX endianness */
1189         bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1190                         PCI_DMA_TODEVICE);
1191
1192         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1193                 flags |= AR5K_TXDESC_NOACK;
1194
1195         pktlen = skb->len;
1196
1197         if (info->control.hw_key) {
1198                 keyidx = info->control.hw_key->hw_key_idx;
1199                 pktlen += info->control.hw_key->icv_len;
1200         }
1201         ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
1202                 ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
1203                 (sc->power_level * 2),
1204                 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1205                 info->control.retry_limit, keyidx, 0, flags, 0, 0);
1206         if (ret)
1207                 goto err_unmap;
1208
1209         memset(mrr_rate, 0, sizeof(mrr_rate));
1210         memset(mrr_tries, 0, sizeof(mrr_tries));
1211         for (i = 0; i < 3; i++) {
1212                 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
1213                 if (!rate)
1214                         break;
1215
1216                 mrr_rate[i] = rate->hw_value;
1217                 mrr_tries[i] = info->control.retries[i].limit;
1218         }
1219
1220         ah->ah_setup_mrr_tx_desc(ah, ds,
1221                 mrr_rate[0], mrr_tries[0],
1222                 mrr_rate[1], mrr_tries[1],
1223                 mrr_rate[2], mrr_tries[2]);
1224
1225         ds->ds_link = 0;
1226         ds->ds_data = bf->skbaddr;
1227
1228         spin_lock_bh(&txq->lock);
1229         list_add_tail(&bf->list, &txq->q);
1230         sc->tx_stats[txq->qnum].len++;
1231         if (txq->link == NULL) /* is this first packet? */
1232                 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
1233         else /* no, so only link it */
1234                 *txq->link = bf->daddr;
1235
1236         txq->link = &ds->ds_link;
1237         ath5k_hw_start_tx_dma(ah, txq->qnum);
1238         mmiowb();
1239         spin_unlock_bh(&txq->lock);
1240
1241         return 0;
1242 err_unmap:
1243         pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1244         return ret;
1245 }
1246
1247 /*******************\
1248 * Descriptors setup *
1249 \*******************/
1250
1251 static int
1252 ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
1253 {
1254         struct ath5k_desc *ds;
1255         struct ath5k_buf *bf;
1256         dma_addr_t da;
1257         unsigned int i;
1258         int ret;
1259
1260         /* allocate descriptors */
1261         sc->desc_len = sizeof(struct ath5k_desc) *
1262                         (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
1263         sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
1264         if (sc->desc == NULL) {
1265                 ATH5K_ERR(sc, "can't allocate descriptors\n");
1266                 ret = -ENOMEM;
1267                 goto err;
1268         }
1269         ds = sc->desc;
1270         da = sc->desc_daddr;
1271         ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
1272                 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
1273
1274         bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
1275                         sizeof(struct ath5k_buf), GFP_KERNEL);
1276         if (bf == NULL) {
1277                 ATH5K_ERR(sc, "can't allocate bufptr\n");
1278                 ret = -ENOMEM;
1279                 goto err_free;
1280         }
1281         sc->bufptr = bf;
1282
1283         INIT_LIST_HEAD(&sc->rxbuf);
1284         for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
1285                 bf->desc = ds;
1286                 bf->daddr = da;
1287                 list_add_tail(&bf->list, &sc->rxbuf);
1288         }
1289
1290         INIT_LIST_HEAD(&sc->txbuf);
1291         sc->txbuf_len = ATH_TXBUF;
1292         for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
1293                         da += sizeof(*ds)) {
1294                 bf->desc = ds;
1295                 bf->daddr = da;
1296                 list_add_tail(&bf->list, &sc->txbuf);
1297         }
1298
1299         /* beacon buffer */
1300         bf->desc = ds;
1301         bf->daddr = da;
1302         sc->bbuf = bf;
1303
1304         return 0;
1305 err_free:
1306         pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1307 err:
1308         sc->desc = NULL;
1309         return ret;
1310 }
1311
1312 static void
1313 ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
1314 {
1315         struct ath5k_buf *bf;
1316
1317         ath5k_txbuf_free(sc, sc->bbuf);
1318         list_for_each_entry(bf, &sc->txbuf, list)
1319                 ath5k_txbuf_free(sc, bf);
1320         list_for_each_entry(bf, &sc->rxbuf, list)
1321                 ath5k_txbuf_free(sc, bf);
1322
1323         /* Free memory associated with all descriptors */
1324         pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1325
1326         kfree(sc->bufptr);
1327         sc->bufptr = NULL;
1328 }
1329
1330
1331
1332
1333
1334 /**************\
1335 * Queues setup *
1336 \**************/
1337
1338 static struct ath5k_txq *
1339 ath5k_txq_setup(struct ath5k_softc *sc,
1340                 int qtype, int subtype)
1341 {
1342         struct ath5k_hw *ah = sc->ah;
1343         struct ath5k_txq *txq;
1344         struct ath5k_txq_info qi = {
1345                 .tqi_subtype = subtype,
1346                 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1347                 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1348                 .tqi_cw_max = AR5K_TXQ_USEDEFAULT
1349         };
1350         int qnum;
1351
1352         /*
1353          * Enable interrupts only for EOL and DESC conditions.
1354          * We mark tx descriptors to receive a DESC interrupt
1355          * when a tx queue gets deep; otherwise waiting for the
1356          * EOL to reap descriptors.  Note that this is done to
1357          * reduce interrupt load and this only defers reaping
1358          * descriptors, never transmitting frames.  Aside from
1359          * reducing interrupts this also permits more concurrency.
1360          * The only potential downside is if the tx queue backs
1361          * up in which case the top half of the kernel may backup
1362          * due to a lack of tx descriptors.
1363          */
1364         qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
1365                                 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
1366         qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
1367         if (qnum < 0) {
1368                 /*
1369                  * NB: don't print a message, this happens
1370                  * normally on parts with too few tx queues
1371                  */
1372                 return ERR_PTR(qnum);
1373         }
1374         if (qnum >= ARRAY_SIZE(sc->txqs)) {
1375                 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
1376                         qnum, ARRAY_SIZE(sc->txqs));
1377                 ath5k_hw_release_tx_queue(ah, qnum);
1378                 return ERR_PTR(-EINVAL);
1379         }
1380         txq = &sc->txqs[qnum];
1381         if (!txq->setup) {
1382                 txq->qnum = qnum;
1383                 txq->link = NULL;
1384                 INIT_LIST_HEAD(&txq->q);
1385                 spin_lock_init(&txq->lock);
1386                 txq->setup = true;
1387         }
1388         return &sc->txqs[qnum];
1389 }
1390
1391 static int
1392 ath5k_beaconq_setup(struct ath5k_hw *ah)
1393 {
1394         struct ath5k_txq_info qi = {
1395                 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1396                 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1397                 .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
1398                 /* NB: for dynamic turbo, don't enable any other interrupts */
1399                 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
1400         };
1401
1402         return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
1403 }
1404
1405 static int
1406 ath5k_beaconq_config(struct ath5k_softc *sc)
1407 {
1408         struct ath5k_hw *ah = sc->ah;
1409         struct ath5k_txq_info qi;
1410         int ret;
1411
1412         ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
1413         if (ret)
1414                 return ret;
1415         if (sc->opmode == NL80211_IFTYPE_AP ||
1416                 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1417                 /*
1418                  * Always burst out beacon and CAB traffic
1419                  * (aifs = cwmin = cwmax = 0)
1420                  */
1421                 qi.tqi_aifs = 0;
1422                 qi.tqi_cw_min = 0;
1423                 qi.tqi_cw_max = 0;
1424         } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
1425                 /*
1426                  * Adhoc mode; backoff between 0 and (2 * cw_min).
1427                  */
1428                 qi.tqi_aifs = 0;
1429                 qi.tqi_cw_min = 0;
1430                 qi.tqi_cw_max = 2 * ah->ah_cw_min;
1431         }
1432
1433         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1434                 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1435                 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1436
1437         ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1438         if (ret) {
1439                 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1440                         "hardware queue!\n", __func__);
1441                 return ret;
1442         }
1443
1444         return ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */;
1445 }
1446
1447 static void
1448 ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1449 {
1450         struct ath5k_buf *bf, *bf0;
1451
1452         /*
1453          * NB: this assumes output has been stopped and
1454          *     we do not need to block ath5k_tx_tasklet
1455          */
1456         spin_lock_bh(&txq->lock);
1457         list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1458                 ath5k_debug_printtxbuf(sc, bf);
1459
1460                 ath5k_txbuf_free(sc, bf);
1461
1462                 spin_lock_bh(&sc->txbuflock);
1463                 sc->tx_stats[txq->qnum].len--;
1464                 list_move_tail(&bf->list, &sc->txbuf);
1465                 sc->txbuf_len++;
1466                 spin_unlock_bh(&sc->txbuflock);
1467         }
1468         txq->link = NULL;
1469         spin_unlock_bh(&txq->lock);
1470 }
1471
1472 /*
1473  * Drain the transmit queues and reclaim resources.
1474  */
1475 static void
1476 ath5k_txq_cleanup(struct ath5k_softc *sc)
1477 {
1478         struct ath5k_hw *ah = sc->ah;
1479         unsigned int i;
1480
1481         /* XXX return value */
1482         if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
1483                 /* don't touch the hardware if marked invalid */
1484                 ath5k_hw_stop_tx_dma(ah, sc->bhalq);
1485                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
1486                         ath5k_hw_get_txdp(ah, sc->bhalq));
1487                 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1488                         if (sc->txqs[i].setup) {
1489                                 ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
1490                                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
1491                                         "link %p\n",
1492                                         sc->txqs[i].qnum,
1493                                         ath5k_hw_get_txdp(ah,
1494                                                         sc->txqs[i].qnum),
1495                                         sc->txqs[i].link);
1496                         }
1497         }
1498         ieee80211_wake_queues(sc->hw); /* XXX move to callers */
1499
1500         for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1501                 if (sc->txqs[i].setup)
1502                         ath5k_txq_drainq(sc, &sc->txqs[i]);
1503 }
1504
1505 static void
1506 ath5k_txq_release(struct ath5k_softc *sc)
1507 {
1508         struct ath5k_txq *txq = sc->txqs;
1509         unsigned int i;
1510
1511         for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1512                 if (txq->setup) {
1513                         ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1514                         txq->setup = false;
1515                 }
1516 }
1517
1518
1519
1520
1521 /*************\
1522 * RX Handling *
1523 \*************/
1524
1525 /*
1526  * Enable the receive h/w following a reset.
1527  */
1528 static int
1529 ath5k_rx_start(struct ath5k_softc *sc)
1530 {
1531         struct ath5k_hw *ah = sc->ah;
1532         struct ath5k_buf *bf;
1533         int ret;
1534
1535         sc->rxbufsize = roundup(IEEE80211_MAX_LEN, sc->cachelsz);
1536
1537         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rxbufsize %u\n",
1538                 sc->cachelsz, sc->rxbufsize);
1539
1540         sc->rxlink = NULL;
1541
1542         spin_lock_bh(&sc->rxbuflock);
1543         list_for_each_entry(bf, &sc->rxbuf, list) {
1544                 ret = ath5k_rxbuf_setup(sc, bf);
1545                 if (ret != 0) {
1546                         spin_unlock_bh(&sc->rxbuflock);
1547                         goto err;
1548                 }
1549         }
1550         bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1551         spin_unlock_bh(&sc->rxbuflock);
1552
1553         ath5k_hw_set_rxdp(ah, bf->daddr);
1554         ath5k_hw_start_rx_dma(ah);      /* enable recv descriptors */
1555         ath5k_mode_setup(sc);           /* set filters, etc. */
1556         ath5k_hw_start_rx_pcu(ah);      /* re-enable PCU/DMA engine */
1557
1558         return 0;
1559 err:
1560         return ret;
1561 }
1562
1563 /*
1564  * Disable the receive h/w in preparation for a reset.
1565  */
1566 static void
1567 ath5k_rx_stop(struct ath5k_softc *sc)
1568 {
1569         struct ath5k_hw *ah = sc->ah;
1570
1571         ath5k_hw_stop_rx_pcu(ah);       /* disable PCU */
1572         ath5k_hw_set_rx_filter(ah, 0);  /* clear recv filter */
1573         ath5k_hw_stop_rx_dma(ah);       /* disable DMA engine */
1574
1575         ath5k_debug_printrxbuffs(sc, ah);
1576
1577         sc->rxlink = NULL;              /* just in case */
1578 }
1579
1580 static unsigned int
1581 ath5k_rx_decrypted(struct ath5k_softc *sc, struct ath5k_desc *ds,
1582                 struct sk_buff *skb, struct ath5k_rx_status *rs)
1583 {
1584         struct ieee80211_hdr *hdr = (void *)skb->data;
1585         unsigned int keyix, hlen;
1586
1587         if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1588                         rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1589                 return RX_FLAG_DECRYPTED;
1590
1591         /* Apparently when a default key is used to decrypt the packet
1592            the hw does not set the index used to decrypt.  In such cases
1593            get the index from the packet. */
1594         hlen = ieee80211_hdrlen(hdr->frame_control);
1595         if (ieee80211_has_protected(hdr->frame_control) &&
1596             !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1597             skb->len >= hlen + 4) {
1598                 keyix = skb->data[hlen + 3] >> 6;
1599
1600                 if (test_bit(keyix, sc->keymap))
1601                         return RX_FLAG_DECRYPTED;
1602         }
1603
1604         return 0;
1605 }
1606
1607
1608 static void
1609 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1610                      struct ieee80211_rx_status *rxs)
1611 {
1612         u64 tsf, bc_tstamp;
1613         u32 hw_tu;
1614         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1615
1616         if (ieee80211_is_beacon(mgmt->frame_control) &&
1617             le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1618             memcmp(mgmt->bssid, sc->ah->ah_bssid, ETH_ALEN) == 0) {
1619                 /*
1620                  * Received an IBSS beacon with the same BSSID. Hardware *must*
1621                  * have updated the local TSF. We have to work around various
1622                  * hardware bugs, though...
1623                  */
1624                 tsf = ath5k_hw_get_tsf64(sc->ah);
1625                 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1626                 hw_tu = TSF_TO_TU(tsf);
1627
1628                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1629                         "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1630                         (unsigned long long)bc_tstamp,
1631                         (unsigned long long)rxs->mactime,
1632                         (unsigned long long)(rxs->mactime - bc_tstamp),
1633                         (unsigned long long)tsf);
1634
1635                 /*
1636                  * Sometimes the HW will give us a wrong tstamp in the rx
1637                  * status, causing the timestamp extension to go wrong.
1638                  * (This seems to happen especially with beacon frames bigger
1639                  * than 78 byte (incl. FCS))
1640                  * But we know that the receive timestamp must be later than the
1641                  * timestamp of the beacon since HW must have synced to that.
1642                  *
1643                  * NOTE: here we assume mactime to be after the frame was
1644                  * received, not like mac80211 which defines it at the start.
1645                  */
1646                 if (bc_tstamp > rxs->mactime) {
1647                         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1648                                 "fixing mactime from %llx to %llx\n",
1649                                 (unsigned long long)rxs->mactime,
1650                                 (unsigned long long)tsf);
1651                         rxs->mactime = tsf;
1652                 }
1653
1654                 /*
1655                  * Local TSF might have moved higher than our beacon timers,
1656                  * in that case we have to update them to continue sending
1657                  * beacons. This also takes care of synchronizing beacon sending
1658                  * times with other stations.
1659                  */
1660                 if (hw_tu >= sc->nexttbtt)
1661                         ath5k_beacon_update_timers(sc, bc_tstamp);
1662         }
1663 }
1664
1665
1666 static void
1667 ath5k_tasklet_rx(unsigned long data)
1668 {
1669         struct ieee80211_rx_status rxs = {};
1670         struct ath5k_rx_status rs = {};
1671         struct sk_buff *skb;
1672         struct ath5k_softc *sc = (void *)data;
1673         struct ath5k_buf *bf, *bf_last;
1674         struct ath5k_desc *ds;
1675         int ret;
1676         int hdrlen;
1677         int pad;
1678
1679         spin_lock(&sc->rxbuflock);
1680         if (list_empty(&sc->rxbuf)) {
1681                 ATH5K_WARN(sc, "empty rx buf pool\n");
1682                 goto unlock;
1683         }
1684         bf_last = list_entry(sc->rxbuf.prev, struct ath5k_buf, list);
1685         do {
1686                 rxs.flag = 0;
1687
1688                 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1689                 BUG_ON(bf->skb == NULL);
1690                 skb = bf->skb;
1691                 ds = bf->desc;
1692
1693                 /*
1694                  * last buffer must not be freed to ensure proper hardware
1695                  * function. When the hardware finishes also a packet next to
1696                  * it, we are sure, it doesn't use it anymore and we can go on.
1697                  */
1698                 if (bf_last == bf)
1699                         bf->flags |= 1;
1700                 if (bf->flags) {
1701                         struct ath5k_buf *bf_next = list_entry(bf->list.next,
1702                                         struct ath5k_buf, list);
1703                         ret = sc->ah->ah_proc_rx_desc(sc->ah, bf_next->desc,
1704                                         &rs);
1705                         if (ret)
1706                                 break;
1707                         bf->flags &= ~1;
1708                         /* skip the overwritten one (even status is martian) */
1709                         goto next;
1710                 }
1711
1712                 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1713                 if (unlikely(ret == -EINPROGRESS))
1714                         break;
1715                 else if (unlikely(ret)) {
1716                         ATH5K_ERR(sc, "error in processing rx descriptor\n");
1717                         spin_unlock(&sc->rxbuflock);
1718                         return;
1719                 }
1720
1721                 if (unlikely(rs.rs_more)) {
1722                         ATH5K_WARN(sc, "unsupported jumbo\n");
1723                         goto next;
1724                 }
1725
1726                 if (unlikely(rs.rs_status)) {
1727                         if (rs.rs_status & AR5K_RXERR_PHY)
1728                                 goto next;
1729                         if (rs.rs_status & AR5K_RXERR_DECRYPT) {
1730                                 /*
1731                                  * Decrypt error.  If the error occurred
1732                                  * because there was no hardware key, then
1733                                  * let the frame through so the upper layers
1734                                  * can process it.  This is necessary for 5210
1735                                  * parts which have no way to setup a ``clear''
1736                                  * key cache entry.
1737                                  *
1738                                  * XXX do key cache faulting
1739                                  */
1740                                 if (rs.rs_keyix == AR5K_RXKEYIX_INVALID &&
1741                                     !(rs.rs_status & AR5K_RXERR_CRC))
1742                                         goto accept;
1743                         }
1744                         if (rs.rs_status & AR5K_RXERR_MIC) {
1745                                 rxs.flag |= RX_FLAG_MMIC_ERROR;
1746                                 goto accept;
1747                         }
1748
1749                         /* let crypto-error packets fall through in MNTR */
1750                         if ((rs.rs_status &
1751                                 ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) ||
1752                                         sc->opmode != NL80211_IFTYPE_MONITOR)
1753                                 goto next;
1754                 }
1755 accept:
1756                 pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
1757                                 PCI_DMA_FROMDEVICE);
1758                 bf->skb = NULL;
1759
1760                 skb_put(skb, rs.rs_datalen);
1761
1762                 /*
1763                  * the hardware adds a padding to 4 byte boundaries between
1764                  * the header and the payload data if the header length is
1765                  * not multiples of 4 - remove it
1766                  */
1767                 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1768                 if (hdrlen & 3) {
1769                         pad = hdrlen % 4;
1770                         memmove(skb->data + pad, skb->data, hdrlen);
1771                         skb_pull(skb, pad);
1772                 }
1773
1774                 /*
1775                  * always extend the mac timestamp, since this information is
1776                  * also needed for proper IBSS merging.
1777                  *
1778                  * XXX: it might be too late to do it here, since rs_tstamp is
1779                  * 15bit only. that means TSF extension has to be done within
1780                  * 32768usec (about 32ms). it might be necessary to move this to
1781                  * the interrupt handler, like it is done in madwifi.
1782                  *
1783                  * Unfortunately we don't know when the hardware takes the rx
1784                  * timestamp (beginning of phy frame, data frame, end of rx?).
1785                  * The only thing we know is that it is hardware specific...
1786                  * On AR5213 it seems the rx timestamp is at the end of the
1787                  * frame, but i'm not sure.
1788                  *
1789                  * NOTE: mac80211 defines mactime at the beginning of the first
1790                  * data symbol. Since we don't have any time references it's
1791                  * impossible to comply to that. This affects IBSS merge only
1792                  * right now, so it's not too bad...
1793                  */
1794                 rxs.mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
1795                 rxs.flag |= RX_FLAG_TSFT;
1796
1797                 rxs.freq = sc->curchan->center_freq;
1798                 rxs.band = sc->curband->band;
1799
1800                 rxs.noise = sc->ah->ah_noise_floor;
1801                 rxs.signal = rxs.noise + rs.rs_rssi;
1802                 rxs.qual = rs.rs_rssi * 100 / 64;
1803
1804                 rxs.antenna = rs.rs_antenna;
1805                 rxs.rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
1806                 rxs.flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
1807
1808                 if (rxs.rate_idx >= 0 && rs.rs_rate ==
1809                     sc->curband->bitrates[rxs.rate_idx].hw_value_short)
1810                         rxs.flag |= RX_FLAG_SHORTPRE;
1811
1812                 ath5k_debug_dump_skb(sc, skb, "RX  ", 0);
1813
1814                 /* check beacons in IBSS mode */
1815                 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1816                         ath5k_check_ibss_tsf(sc, skb, &rxs);
1817
1818                 __ieee80211_rx(sc->hw, skb, &rxs);
1819 next:
1820                 list_move_tail(&bf->list, &sc->rxbuf);
1821         } while (ath5k_rxbuf_setup(sc, bf) == 0);
1822 unlock:
1823         spin_unlock(&sc->rxbuflock);
1824 }
1825
1826
1827
1828
1829 /*************\
1830 * TX Handling *
1831 \*************/
1832
1833 static void
1834 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1835 {
1836         struct ath5k_tx_status ts = {};
1837         struct ath5k_buf *bf, *bf0;
1838         struct ath5k_desc *ds;
1839         struct sk_buff *skb;
1840         struct ieee80211_tx_info *info;
1841         int i, ret;
1842
1843         spin_lock(&txq->lock);
1844         list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1845                 ds = bf->desc;
1846
1847                 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1848                 if (unlikely(ret == -EINPROGRESS))
1849                         break;
1850                 else if (unlikely(ret)) {
1851                         ATH5K_ERR(sc, "error %d while processing queue %u\n",
1852                                 ret, txq->qnum);
1853                         break;
1854                 }
1855
1856                 skb = bf->skb;
1857                 info = IEEE80211_SKB_CB(skb);
1858                 bf->skb = NULL;
1859
1860                 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
1861                                 PCI_DMA_TODEVICE);
1862
1863                 memset(&info->status, 0, sizeof(info->status));
1864                 info->tx_rate_idx = ath5k_hw_to_driver_rix(sc,
1865                                 ts.ts_rate[ts.ts_final_idx]);
1866                 info->status.retry_count = ts.ts_longretry;
1867
1868                 for (i = 0; i < 4; i++) {
1869                         struct ieee80211_tx_altrate *r =
1870                                 &info->status.retries[i];
1871
1872                         if (ts.ts_rate[i]) {
1873                                 r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
1874                                 r->limit = ts.ts_retry[i];
1875                         } else {
1876                                 r->rate_idx = -1;
1877                                 r->limit = 0;
1878                         }
1879                 }
1880
1881                 info->status.excessive_retries = 0;
1882                 if (unlikely(ts.ts_status)) {
1883                         sc->ll_stats.dot11ACKFailureCount++;
1884                         if (ts.ts_status & AR5K_TXERR_XRETRY)
1885                                 info->status.excessive_retries = 1;
1886                         else if (ts.ts_status & AR5K_TXERR_FILT)
1887                                 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1888                 } else {
1889                         info->flags |= IEEE80211_TX_STAT_ACK;
1890                         info->status.ack_signal = ts.ts_rssi;
1891                 }
1892
1893                 ieee80211_tx_status(sc->hw, skb);
1894                 sc->tx_stats[txq->qnum].count++;
1895
1896                 spin_lock(&sc->txbuflock);
1897                 sc->tx_stats[txq->qnum].len--;
1898                 list_move_tail(&bf->list, &sc->txbuf);
1899                 sc->txbuf_len++;
1900                 spin_unlock(&sc->txbuflock);
1901         }
1902         if (likely(list_empty(&txq->q)))
1903                 txq->link = NULL;
1904         spin_unlock(&txq->lock);
1905         if (sc->txbuf_len > ATH_TXBUF / 5)
1906                 ieee80211_wake_queues(sc->hw);
1907 }
1908
1909 static void
1910 ath5k_tasklet_tx(unsigned long data)
1911 {
1912         struct ath5k_softc *sc = (void *)data;
1913
1914         ath5k_tx_processq(sc, sc->txq);
1915 }
1916
1917
1918 /*****************\
1919 * Beacon handling *
1920 \*****************/
1921
1922 /*
1923  * Setup the beacon frame for transmit.
1924  */
1925 static int
1926 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1927 {
1928         struct sk_buff *skb = bf->skb;
1929         struct  ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1930         struct ath5k_hw *ah = sc->ah;
1931         struct ath5k_desc *ds;
1932         int ret, antenna = 0;
1933         u32 flags;
1934
1935         bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1936                         PCI_DMA_TODEVICE);
1937         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1938                         "skbaddr %llx\n", skb, skb->data, skb->len,
1939                         (unsigned long long)bf->skbaddr);
1940         if (pci_dma_mapping_error(sc->pdev, bf->skbaddr)) {
1941                 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1942                 return -EIO;
1943         }
1944
1945         ds = bf->desc;
1946
1947         flags = AR5K_TXDESC_NOACK;
1948         if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1949                 ds->ds_link = bf->daddr;        /* self-linked */
1950                 flags |= AR5K_TXDESC_VEOL;
1951                 /*
1952                  * Let hardware handle antenna switching if txantenna is not set
1953                  */
1954         } else {
1955                 ds->ds_link = 0;
1956                 /*
1957                  * Switch antenna every 4 beacons if txantenna is not set
1958                  * XXX assumes two antennas
1959                  */
1960                 if (antenna == 0)
1961                         antenna = sc->bsent & 4 ? 2 : 1;
1962         }
1963
1964         ds->ds_data = bf->skbaddr;
1965         ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1966                         ieee80211_get_hdrlen_from_skb(skb),
1967                         AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1968                         ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1969                         1, AR5K_TXKEYIX_INVALID,
1970                         antenna, flags, 0, 0);
1971         if (ret)
1972                 goto err_unmap;
1973
1974         return 0;
1975 err_unmap:
1976         pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1977         return ret;
1978 }
1979
1980 /*
1981  * Transmit a beacon frame at SWBA.  Dynamic updates to the
1982  * frame contents are done as needed and the slot time is
1983  * also adjusted based on current state.
1984  *
1985  * this is usually called from interrupt context (ath5k_intr())
1986  * but also from ath5k_beacon_config() in IBSS mode which in turn
1987  * can be called from a tasklet and user context
1988  */
1989 static void
1990 ath5k_beacon_send(struct ath5k_softc *sc)
1991 {
1992         struct ath5k_buf *bf = sc->bbuf;
1993         struct ath5k_hw *ah = sc->ah;
1994
1995         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1996
1997         if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
1998                         sc->opmode == NL80211_IFTYPE_MONITOR)) {
1999                 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
2000                 return;
2001         }
2002         /*
2003          * Check if the previous beacon has gone out.  If
2004          * not don't don't try to post another, skip this
2005          * period and wait for the next.  Missed beacons
2006          * indicate a problem and should not occur.  If we
2007          * miss too many consecutive beacons reset the device.
2008          */
2009         if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
2010                 sc->bmisscount++;
2011                 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2012                         "missed %u consecutive beacons\n", sc->bmisscount);
2013                 if (sc->bmisscount > 3) {               /* NB: 3 is a guess */
2014                         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2015                                 "stuck beacon time (%u missed)\n",
2016                                 sc->bmisscount);
2017                         tasklet_schedule(&sc->restq);
2018                 }
2019                 return;
2020         }
2021         if (unlikely(sc->bmisscount != 0)) {
2022                 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2023                         "resume beacon xmit after %u misses\n",
2024                         sc->bmisscount);
2025                 sc->bmisscount = 0;
2026         }
2027
2028         /*
2029          * Stop any current dma and put the new frame on the queue.
2030          * This should never fail since we check above that no frames
2031          * are still pending on the queue.
2032          */
2033         if (unlikely(ath5k_hw_stop_tx_dma(ah, sc->bhalq))) {
2034                 ATH5K_WARN(sc, "beacon queue %u didn't stop?\n", sc->bhalq);
2035                 /* NB: hw still stops DMA, so proceed */
2036         }
2037
2038         ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
2039         ath5k_hw_start_tx_dma(ah, sc->bhalq);
2040         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
2041                 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
2042
2043         sc->bsent++;
2044 }
2045
2046
2047 /**
2048  * ath5k_beacon_update_timers - update beacon timers
2049  *
2050  * @sc: struct ath5k_softc pointer we are operating on
2051  * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
2052  *          beacon timer update based on the current HW TSF.
2053  *
2054  * Calculate the next target beacon transmit time (TBTT) based on the timestamp
2055  * of a received beacon or the current local hardware TSF and write it to the
2056  * beacon timer registers.
2057  *
2058  * This is called in a variety of situations, e.g. when a beacon is received,
2059  * when a TSF update has been detected, but also when an new IBSS is created or
2060  * when we otherwise know we have to update the timers, but we keep it in this
2061  * function to have it all together in one place.
2062  */
2063 static void
2064 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
2065 {
2066         struct ath5k_hw *ah = sc->ah;
2067         u32 nexttbtt, intval, hw_tu, bc_tu;
2068         u64 hw_tsf;
2069
2070         intval = sc->bintval & AR5K_BEACON_PERIOD;
2071         if (WARN_ON(!intval))
2072                 return;
2073
2074         /* beacon TSF converted to TU */
2075         bc_tu = TSF_TO_TU(bc_tsf);
2076
2077         /* current TSF converted to TU */
2078         hw_tsf = ath5k_hw_get_tsf64(ah);
2079         hw_tu = TSF_TO_TU(hw_tsf);
2080
2081 #define FUDGE 3
2082         /* we use FUDGE to make sure the next TBTT is ahead of the current TU */
2083         if (bc_tsf == -1) {
2084                 /*
2085                  * no beacons received, called internally.
2086                  * just need to refresh timers based on HW TSF.
2087                  */
2088                 nexttbtt = roundup(hw_tu + FUDGE, intval);
2089         } else if (bc_tsf == 0) {
2090                 /*
2091                  * no beacon received, probably called by ath5k_reset_tsf().
2092                  * reset TSF to start with 0.
2093                  */
2094                 nexttbtt = intval;
2095                 intval |= AR5K_BEACON_RESET_TSF;
2096         } else if (bc_tsf > hw_tsf) {
2097                 /*
2098                  * beacon received, SW merge happend but HW TSF not yet updated.
2099                  * not possible to reconfigure timers yet, but next time we
2100                  * receive a beacon with the same BSSID, the hardware will
2101                  * automatically update the TSF and then we need to reconfigure
2102                  * the timers.
2103                  */
2104                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2105                         "need to wait for HW TSF sync\n");
2106                 return;
2107         } else {
2108                 /*
2109                  * most important case for beacon synchronization between STA.
2110                  *
2111                  * beacon received and HW TSF has been already updated by HW.
2112                  * update next TBTT based on the TSF of the beacon, but make
2113                  * sure it is ahead of our local TSF timer.
2114                  */
2115                 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2116         }
2117 #undef FUDGE
2118
2119         sc->nexttbtt = nexttbtt;
2120
2121         intval |= AR5K_BEACON_ENA;
2122         ath5k_hw_init_beacon(ah, nexttbtt, intval);
2123
2124         /*
2125          * debugging output last in order to preserve the time critical aspect
2126          * of this function
2127          */
2128         if (bc_tsf == -1)
2129                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2130                         "reconfigured timers based on HW TSF\n");
2131         else if (bc_tsf == 0)
2132                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2133                         "reset HW TSF and timers\n");
2134         else
2135                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2136                         "updated timers based on beacon TSF\n");
2137
2138         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2139                           "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2140                           (unsigned long long) bc_tsf,
2141                           (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2142         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2143                 intval & AR5K_BEACON_PERIOD,
2144                 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2145                 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2146 }
2147
2148
2149 /**
2150  * ath5k_beacon_config - Configure the beacon queues and interrupts
2151  *
2152  * @sc: struct ath5k_softc pointer we are operating on
2153  *
2154  * When operating in station mode we want to receive a BMISS interrupt when we
2155  * stop seeing beacons from the AP we've associated with so we can look for
2156  * another AP to associate with.
2157  *
2158  * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2159  * interrupts to detect TSF updates only.
2160  *
2161  * AP mode is missing.
2162  */
2163 static void
2164 ath5k_beacon_config(struct ath5k_softc *sc)
2165 {
2166         struct ath5k_hw *ah = sc->ah;
2167
2168         ath5k_hw_set_imr(ah, 0);
2169         sc->bmisscount = 0;
2170         sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2171
2172         if (sc->opmode == NL80211_IFTYPE_STATION) {
2173                 sc->imask |= AR5K_INT_BMISS;
2174         } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2175                 /*
2176                  * In IBSS mode we use a self-linked tx descriptor and let the
2177                  * hardware send the beacons automatically. We have to load it
2178                  * only once here.
2179                  * We use the SWBA interrupt only to keep track of the beacon
2180                  * timers in order to detect automatic TSF updates.
2181                  */
2182                 ath5k_beaconq_config(sc);
2183
2184                 sc->imask |= AR5K_INT_SWBA;
2185
2186                 if (ath5k_hw_hasveol(ah)) {
2187                         spin_lock(&sc->block);
2188                         ath5k_beacon_send(sc);
2189                         spin_unlock(&sc->block);
2190                 }
2191         }
2192         /* TODO else AP */
2193
2194         ath5k_hw_set_imr(ah, sc->imask);
2195 }
2196
2197
2198 /********************\
2199 * Interrupt handling *
2200 \********************/
2201
2202 static int
2203 ath5k_init(struct ath5k_softc *sc, bool is_resume)
2204 {
2205         int ret;
2206
2207         mutex_lock(&sc->lock);
2208
2209         if (is_resume && !test_bit(ATH_STAT_STARTED, sc->status))
2210                 goto out_ok;
2211
2212         __clear_bit(ATH_STAT_STARTED, sc->status);
2213
2214         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2215
2216         /*
2217          * Stop anything previously setup.  This is safe
2218          * no matter this is the first time through or not.
2219          */
2220         ath5k_stop_locked(sc);
2221
2222         /*
2223          * The basic interface to setting the hardware in a good
2224          * state is ``reset''.  On return the hardware is known to
2225          * be powered up and with interrupts disabled.  This must
2226          * be followed by initialization of the appropriate bits
2227          * and then setup of the interrupt mask.
2228          */
2229         sc->curchan = sc->hw->conf.channel;
2230         sc->curband = &sc->sbands[sc->curchan->band];
2231         sc->imask = AR5K_INT_RX | AR5K_INT_TX | AR5K_INT_RXEOL |
2232                 AR5K_INT_RXORN | AR5K_INT_FATAL | AR5K_INT_GLOBAL |
2233                 AR5K_INT_MIB;
2234         ret = ath5k_reset(sc, false, false);
2235         if (ret)
2236                 goto done;
2237
2238         __set_bit(ATH_STAT_STARTED, sc->status);
2239
2240         /* Set ack to be sent at low bit-rates */
2241         ath5k_hw_set_ack_bitrate_high(sc->ah, false);
2242
2243         mod_timer(&sc->calib_tim, round_jiffies(jiffies +
2244                         msecs_to_jiffies(ath5k_calinterval * 1000)));
2245
2246 out_ok:
2247         ret = 0;
2248 done:
2249         mmiowb();
2250         mutex_unlock(&sc->lock);
2251         return ret;
2252 }
2253
2254 static int
2255 ath5k_stop_locked(struct ath5k_softc *sc)
2256 {
2257         struct ath5k_hw *ah = sc->ah;
2258
2259         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2260                         test_bit(ATH_STAT_INVALID, sc->status));
2261
2262         /*
2263          * Shutdown the hardware and driver:
2264          *    stop output from above
2265          *    disable interrupts
2266          *    turn off timers
2267          *    turn off the radio
2268          *    clear transmit machinery
2269          *    clear receive machinery
2270          *    drain and release tx queues
2271          *    reclaim beacon resources
2272          *    power down hardware
2273          *
2274          * Note that some of this work is not possible if the
2275          * hardware is gone (invalid).
2276          */
2277         ieee80211_stop_queues(sc->hw);
2278
2279         if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2280                 ath5k_led_off(sc);
2281                 ath5k_hw_set_imr(ah, 0);
2282                 synchronize_irq(sc->pdev->irq);
2283         }
2284         ath5k_txq_cleanup(sc);
2285         if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2286                 ath5k_rx_stop(sc);
2287                 ath5k_hw_phy_disable(ah);
2288         } else
2289                 sc->rxlink = NULL;
2290
2291         return 0;
2292 }
2293
2294 /*
2295  * Stop the device, grabbing the top-level lock to protect
2296  * against concurrent entry through ath5k_init (which can happen
2297  * if another thread does a system call and the thread doing the
2298  * stop is preempted).
2299  */
2300 static int
2301 ath5k_stop_hw(struct ath5k_softc *sc, bool is_suspend)
2302 {
2303         int ret;
2304
2305         mutex_lock(&sc->lock);
2306         ret = ath5k_stop_locked(sc);
2307         if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2308                 /*
2309                  * Set the chip in full sleep mode.  Note that we are
2310                  * careful to do this only when bringing the interface
2311                  * completely to a stop.  When the chip is in this state
2312                  * it must be carefully woken up or references to
2313                  * registers in the PCI clock domain may freeze the bus
2314                  * (and system).  This varies by chip and is mostly an
2315                  * issue with newer parts that go to sleep more quickly.
2316                  */
2317                 if (sc->ah->ah_mac_srev >= 0x78) {
2318                         /*
2319                          * XXX
2320                          * don't put newer MAC revisions > 7.8 to sleep because
2321                          * of the above mentioned problems
2322                          */
2323                         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mac version > 7.8, "
2324                                 "not putting device to sleep\n");
2325                 } else {
2326                         ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2327                                 "putting device to full sleep\n");
2328                         ath5k_hw_set_power(sc->ah, AR5K_PM_FULL_SLEEP, true, 0);
2329                 }
2330         }
2331         ath5k_txbuf_free(sc, sc->bbuf);
2332         if (!is_suspend)
2333                 __clear_bit(ATH_STAT_STARTED, sc->status);
2334
2335         mmiowb();
2336         mutex_unlock(&sc->lock);
2337
2338         del_timer_sync(&sc->calib_tim);
2339         tasklet_kill(&sc->rxtq);
2340         tasklet_kill(&sc->txtq);
2341         tasklet_kill(&sc->restq);
2342
2343         return ret;
2344 }
2345
2346 static irqreturn_t
2347 ath5k_intr(int irq, void *dev_id)
2348 {
2349         struct ath5k_softc *sc = dev_id;
2350         struct ath5k_hw *ah = sc->ah;
2351         enum ath5k_int status;
2352         unsigned int counter = 1000;
2353
2354         if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2355                                 !ath5k_hw_is_intr_pending(ah)))
2356                 return IRQ_NONE;
2357
2358         do {
2359                 /*
2360                  * Figure out the reason(s) for the interrupt.  Note
2361                  * that get_isr returns a pseudo-ISR that may include
2362                  * bits we haven't explicitly enabled so we mask the
2363                  * value to insure we only process bits we requested.
2364                  */
2365                 ath5k_hw_get_isr(ah, &status);          /* NB: clears IRQ too */
2366                 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2367                                 status, sc->imask);
2368                 status &= sc->imask; /* discard unasked for bits */
2369                 if (unlikely(status & AR5K_INT_FATAL)) {
2370                         /*
2371                          * Fatal errors are unrecoverable.
2372                          * Typically these are caused by DMA errors.
2373                          */
2374                         tasklet_schedule(&sc->restq);
2375                 } else if (unlikely(status & AR5K_INT_RXORN)) {
2376                         tasklet_schedule(&sc->restq);
2377                 } else {
2378                         if (status & AR5K_INT_SWBA) {
2379                                 /*
2380                                 * Software beacon alert--time to send a beacon.
2381                                 * Handle beacon transmission directly; deferring
2382                                 * this is too slow to meet timing constraints
2383                                 * under load.
2384                                 *
2385                                 * In IBSS mode we use this interrupt just to
2386                                 * keep track of the next TBTT (target beacon
2387                                 * transmission time) in order to detect wether
2388                                 * automatic TSF updates happened.
2389                                 */
2390                                 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2391                                          /* XXX: only if VEOL suppported */
2392                                         u64 tsf = ath5k_hw_get_tsf64(ah);
2393                                         sc->nexttbtt += sc->bintval;
2394                                         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2395                                                   "SWBA nexttbtt: %x hw_tu: %x "
2396                                                   "TSF: %llx\n",
2397                                                   sc->nexttbtt,
2398                                                   TSF_TO_TU(tsf),
2399                                                   (unsigned long long) tsf);
2400                                 } else {
2401                                         spin_lock(&sc->block);
2402                                         ath5k_beacon_send(sc);
2403                                         spin_unlock(&sc->block);
2404                                 }
2405                         }
2406                         if (status & AR5K_INT_RXEOL) {
2407                                 /*
2408                                 * NB: the hardware should re-read the link when
2409                                 *     RXE bit is written, but it doesn't work at
2410                                 *     least on older hardware revs.
2411                                 */
2412                                 sc->rxlink = NULL;
2413                         }
2414                         if (status & AR5K_INT_TXURN) {
2415                                 /* bump tx trigger level */
2416                                 ath5k_hw_update_tx_triglevel(ah, true);
2417                         }
2418                         if (status & AR5K_INT_RX)
2419                                 tasklet_schedule(&sc->rxtq);
2420                         if (status & AR5K_INT_TX)
2421                                 tasklet_schedule(&sc->txtq);
2422                         if (status & AR5K_INT_BMISS) {
2423                         }
2424                         if (status & AR5K_INT_MIB) {
2425                                 /*
2426                                  * These stats are also used for ANI i think
2427                                  * so how about updating them more often ?
2428                                  */
2429                                 ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
2430                         }
2431                 }
2432         } while (ath5k_hw_is_intr_pending(ah) && counter-- > 0);
2433
2434         if (unlikely(!counter))
2435                 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2436
2437         return IRQ_HANDLED;
2438 }
2439
2440 static void
2441 ath5k_tasklet_reset(unsigned long data)
2442 {
2443         struct ath5k_softc *sc = (void *)data;
2444
2445         ath5k_reset_wake(sc);
2446 }
2447
2448 /*
2449  * Periodically recalibrate the PHY to account
2450  * for temperature/environment changes.
2451  */
2452 static void
2453 ath5k_calibrate(unsigned long data)
2454 {
2455         struct ath5k_softc *sc = (void *)data;
2456         struct ath5k_hw *ah = sc->ah;
2457
2458         ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2459                 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2460                 sc->curchan->hw_value);
2461
2462         if (ath5k_hw_get_rf_gain(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2463                 /*
2464                  * Rfgain is out of bounds, reset the chip
2465                  * to load new gain values.
2466                  */
2467                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2468                 ath5k_reset_wake(sc);
2469         }
2470         if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2471                 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2472                         ieee80211_frequency_to_channel(
2473                                 sc->curchan->center_freq));
2474
2475         mod_timer(&sc->calib_tim, round_jiffies(jiffies +
2476                         msecs_to_jiffies(ath5k_calinterval * 1000)));
2477 }
2478
2479
2480
2481 /***************\
2482 * LED functions *
2483 \***************/
2484
2485 static void
2486 ath5k_led_enable(struct ath5k_softc *sc)
2487 {
2488         if (test_bit(ATH_STAT_LEDSOFT, sc->status)) {
2489                 ath5k_hw_set_gpio_output(sc->ah, sc->led_pin);
2490                 ath5k_led_off(sc);
2491         }
2492 }
2493
2494 static void
2495 ath5k_led_on(struct ath5k_softc *sc)
2496 {
2497         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2498                 return;
2499         ath5k_hw_set_gpio(sc->ah, sc->led_pin, sc->led_on);
2500 }
2501
2502 static void
2503 ath5k_led_off(struct ath5k_softc *sc)
2504 {
2505         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2506                 return;
2507         ath5k_hw_set_gpio(sc->ah, sc->led_pin, !sc->led_on);
2508 }
2509
2510 static void
2511 ath5k_led_brightness_set(struct led_classdev *led_dev,
2512         enum led_brightness brightness)
2513 {
2514         struct ath5k_led *led = container_of(led_dev, struct ath5k_led,
2515                 led_dev);
2516
2517         if (brightness == LED_OFF)
2518                 ath5k_led_off(led->sc);
2519         else
2520                 ath5k_led_on(led->sc);
2521 }
2522
2523 static int
2524 ath5k_register_led(struct ath5k_softc *sc, struct ath5k_led *led,
2525                    const char *name, char *trigger)
2526 {
2527         int err;
2528
2529         led->sc = sc;
2530         strncpy(led->name, name, sizeof(led->name));
2531         led->led_dev.name = led->name;
2532         led->led_dev.default_trigger = trigger;
2533         led->led_dev.brightness_set = ath5k_led_brightness_set;
2534
2535         err = led_classdev_register(&sc->pdev->dev, &led->led_dev);
2536         if (err)
2537         {
2538                 ATH5K_WARN(sc, "could not register LED %s\n", name);
2539                 led->sc = NULL;
2540         }
2541         return err;
2542 }
2543
2544 static void
2545 ath5k_unregister_led(struct ath5k_led *led)
2546 {
2547         if (!led->sc)
2548                 return;
2549         led_classdev_unregister(&led->led_dev);
2550         ath5k_led_off(led->sc);
2551         led->sc = NULL;
2552 }
2553
2554 static void
2555 ath5k_unregister_leds(struct ath5k_softc *sc)
2556 {
2557         ath5k_unregister_led(&sc->rx_led);
2558         ath5k_unregister_led(&sc->tx_led);
2559 }
2560
2561
2562 static int
2563 ath5k_init_leds(struct ath5k_softc *sc)
2564 {
2565         int ret = 0;
2566         struct ieee80211_hw *hw = sc->hw;
2567         struct pci_dev *pdev = sc->pdev;
2568         char name[ATH5K_LED_MAX_NAME_LEN + 1];
2569
2570         /*
2571          * Auto-enable soft led processing for IBM cards and for
2572          * 5211 minipci cards.
2573          */
2574         if (pdev->device == PCI_DEVICE_ID_ATHEROS_AR5212_IBM ||
2575             pdev->device == PCI_DEVICE_ID_ATHEROS_AR5211) {
2576                 __set_bit(ATH_STAT_LEDSOFT, sc->status);
2577                 sc->led_pin = 0;
2578                 sc->led_on = 0;  /* active low */
2579         }
2580         /* Enable softled on PIN1 on HP Compaq nc6xx, nc4000 & nx5000 laptops */
2581         if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ) {
2582                 __set_bit(ATH_STAT_LEDSOFT, sc->status);
2583                 sc->led_pin = 1;
2584                 sc->led_on = 1;  /* active high */
2585         }
2586         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2587                 goto out;
2588
2589         ath5k_led_enable(sc);
2590
2591         snprintf(name, sizeof(name), "ath5k-%s::rx", wiphy_name(hw->wiphy));
2592         ret = ath5k_register_led(sc, &sc->rx_led, name,
2593                 ieee80211_get_rx_led_name(hw));
2594         if (ret)
2595                 goto out;
2596
2597         snprintf(name, sizeof(name), "ath5k-%s::tx", wiphy_name(hw->wiphy));
2598         ret = ath5k_register_led(sc, &sc->tx_led, name,
2599                 ieee80211_get_tx_led_name(hw));
2600 out:
2601         return ret;
2602 }
2603
2604
2605 /********************\
2606 * Mac80211 functions *
2607 \********************/
2608
2609 static int
2610 ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2611 {
2612         struct ath5k_softc *sc = hw->priv;
2613         struct ath5k_buf *bf;
2614         unsigned long flags;
2615         int hdrlen;
2616         int pad;
2617
2618         ath5k_debug_dump_skb(sc, skb, "TX  ", 1);
2619
2620         if (sc->opmode == NL80211_IFTYPE_MONITOR)
2621                 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, "tx in monitor (scan?)\n");
2622
2623         /*
2624          * the hardware expects the header padded to 4 byte boundaries
2625          * if this is not the case we add the padding after the header
2626          */
2627         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
2628         if (hdrlen & 3) {
2629                 pad = hdrlen % 4;
2630                 if (skb_headroom(skb) < pad) {
2631                         ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough"
2632                                 " headroom to pad %d\n", hdrlen, pad);
2633                         return -1;
2634                 }
2635                 skb_push(skb, pad);
2636                 memmove(skb->data, skb->data+pad, hdrlen);
2637         }
2638
2639         spin_lock_irqsave(&sc->txbuflock, flags);
2640         if (list_empty(&sc->txbuf)) {
2641                 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
2642                 spin_unlock_irqrestore(&sc->txbuflock, flags);
2643                 ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
2644                 return -1;
2645         }
2646         bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
2647         list_del(&bf->list);
2648         sc->txbuf_len--;
2649         if (list_empty(&sc->txbuf))
2650                 ieee80211_stop_queues(hw);
2651         spin_unlock_irqrestore(&sc->txbuflock, flags);
2652
2653         bf->skb = skb;
2654
2655         if (ath5k_txbuf_setup(sc, bf)) {
2656                 bf->skb = NULL;
2657                 spin_lock_irqsave(&sc->txbuflock, flags);
2658                 list_add_tail(&bf->list, &sc->txbuf);
2659                 sc->txbuf_len++;
2660                 spin_unlock_irqrestore(&sc->txbuflock, flags);
2661                 dev_kfree_skb_any(skb);
2662                 return 0;
2663         }
2664
2665         return 0;
2666 }
2667
2668 static int
2669 ath5k_reset(struct ath5k_softc *sc, bool stop, bool change_channel)
2670 {
2671         struct ath5k_hw *ah = sc->ah;
2672         int ret;
2673
2674         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2675
2676         if (stop) {
2677                 ath5k_hw_set_imr(ah, 0);
2678                 ath5k_txq_cleanup(sc);
2679                 ath5k_rx_stop(sc);
2680         }
2681         ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, true);
2682         if (ret) {
2683                 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2684                 goto err;
2685         }
2686
2687         /*
2688          * This is needed only to setup initial state
2689          * but it's best done after a reset.
2690          */
2691         ath5k_hw_set_txpower_limit(sc->ah, 0);
2692
2693         ret = ath5k_rx_start(sc);
2694         if (ret) {
2695                 ATH5K_ERR(sc, "can't start recv logic\n");
2696                 goto err;
2697         }
2698
2699         /*
2700          * Change channels and update the h/w rate map if we're switching;
2701          * e.g. 11a to 11b/g.
2702          *
2703          * We may be doing a reset in response to an ioctl that changes the
2704          * channel so update any state that might change as a result.
2705          *
2706          * XXX needed?
2707          */
2708 /*      ath5k_chan_change(sc, c); */
2709
2710         ath5k_beacon_config(sc);
2711         /* intrs are enabled by ath5k_beacon_config */
2712
2713         return 0;
2714 err:
2715         return ret;
2716 }
2717
2718 static int
2719 ath5k_reset_wake(struct ath5k_softc *sc)
2720 {
2721         int ret;
2722
2723         ret = ath5k_reset(sc, true, true);
2724         if (!ret)
2725                 ieee80211_wake_queues(sc->hw);
2726
2727         return ret;
2728 }
2729
2730 static int ath5k_start(struct ieee80211_hw *hw)
2731 {
2732         return ath5k_init(hw->priv, false);
2733 }
2734
2735 static void ath5k_stop(struct ieee80211_hw *hw)
2736 {
2737         ath5k_stop_hw(hw->priv, false);
2738 }
2739
2740 static int ath5k_add_interface(struct ieee80211_hw *hw,
2741                 struct ieee80211_if_init_conf *conf)
2742 {
2743         struct ath5k_softc *sc = hw->priv;
2744         int ret;
2745
2746         mutex_lock(&sc->lock);
2747         if (sc->vif) {
2748                 ret = 0;
2749                 goto end;
2750         }
2751
2752         sc->vif = conf->vif;
2753
2754         switch (conf->type) {
2755         case NL80211_IFTYPE_STATION:
2756         case NL80211_IFTYPE_ADHOC:
2757         case NL80211_IFTYPE_MONITOR:
2758                 sc->opmode = conf->type;
2759                 break;
2760         default:
2761                 ret = -EOPNOTSUPP;
2762                 goto end;
2763         }
2764
2765         /* Set to a reasonable value. Note that this will
2766          * be set to mac80211's value at ath5k_config(). */
2767         sc->bintval = 1000;
2768
2769         ret = 0;
2770 end:
2771         mutex_unlock(&sc->lock);
2772         return ret;
2773 }
2774
2775 static void
2776 ath5k_remove_interface(struct ieee80211_hw *hw,
2777                         struct ieee80211_if_init_conf *conf)
2778 {
2779         struct ath5k_softc *sc = hw->priv;
2780
2781         mutex_lock(&sc->lock);
2782         if (sc->vif != conf->vif)
2783                 goto end;
2784
2785         sc->vif = NULL;
2786 end:
2787         mutex_unlock(&sc->lock);
2788 }
2789
2790 /*
2791  * TODO: Phy disable/diversity etc
2792  */
2793 static int
2794 ath5k_config(struct ieee80211_hw *hw,
2795                         struct ieee80211_conf *conf)
2796 {
2797         struct ath5k_softc *sc = hw->priv;
2798
2799         sc->bintval = conf->beacon_int;
2800         sc->power_level = conf->power_level;
2801
2802         return ath5k_chan_set(sc, conf->channel);
2803 }
2804
2805 static int
2806 ath5k_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2807                         struct ieee80211_if_conf *conf)
2808 {
2809         struct ath5k_softc *sc = hw->priv;
2810         struct ath5k_hw *ah = sc->ah;
2811         int ret;
2812
2813         mutex_lock(&sc->lock);
2814         if (sc->vif != vif) {
2815                 ret = -EIO;
2816                 goto unlock;
2817         }
2818         if (conf->bssid) {
2819                 /* Cache for later use during resets */
2820                 memcpy(ah->ah_bssid, conf->bssid, ETH_ALEN);
2821                 /* XXX: assoc id is set to 0 for now, mac80211 doesn't have
2822                  * a clean way of letting us retrieve this yet. */
2823                 ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
2824                 mmiowb();
2825         }
2826
2827         if (conf->changed & IEEE80211_IFCC_BEACON &&
2828             vif->type == NL80211_IFTYPE_ADHOC) {
2829                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2830                 if (!beacon) {
2831                         ret = -ENOMEM;
2832                         goto unlock;
2833                 }
2834                 /* call old handler for now */
2835                 ath5k_beacon_update(hw, beacon);
2836         }
2837
2838         mutex_unlock(&sc->lock);
2839
2840         return ath5k_reset_wake(sc);
2841 unlock:
2842         mutex_unlock(&sc->lock);
2843         return ret;
2844 }
2845
2846 #define SUPPORTED_FIF_FLAGS \
2847         FIF_PROMISC_IN_BSS |  FIF_ALLMULTI | FIF_FCSFAIL | \
2848         FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
2849         FIF_BCN_PRBRESP_PROMISC
2850 /*
2851  * o always accept unicast, broadcast, and multicast traffic
2852  * o multicast traffic for all BSSIDs will be enabled if mac80211
2853  *   says it should be
2854  * o maintain current state of phy ofdm or phy cck error reception.
2855  *   If the hardware detects any of these type of errors then
2856  *   ath5k_hw_get_rx_filter() will pass to us the respective
2857  *   hardware filters to be able to receive these type of frames.
2858  * o probe request frames are accepted only when operating in
2859  *   hostap, adhoc, or monitor modes
2860  * o enable promiscuous mode according to the interface state
2861  * o accept beacons:
2862  *   - when operating in adhoc mode so the 802.11 layer creates
2863  *     node table entries for peers,
2864  *   - when operating in station mode for collecting rssi data when
2865  *     the station is otherwise quiet, or
2866  *   - when scanning
2867  */
2868 static void ath5k_configure_filter(struct ieee80211_hw *hw,
2869                 unsigned int changed_flags,
2870                 unsigned int *new_flags,
2871                 int mc_count, struct dev_mc_list *mclist)
2872 {
2873         struct ath5k_softc *sc = hw->priv;
2874         struct ath5k_hw *ah = sc->ah;
2875         u32 mfilt[2], val, rfilt;
2876         u8 pos;
2877         int i;
2878
2879         mfilt[0] = 0;
2880         mfilt[1] = 0;
2881
2882         /* Only deal with supported flags */
2883         changed_flags &= SUPPORTED_FIF_FLAGS;
2884         *new_flags &= SUPPORTED_FIF_FLAGS;
2885
2886         /* If HW detects any phy or radar errors, leave those filters on.
2887          * Also, always enable Unicast, Broadcasts and Multicast
2888          * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
2889         rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
2890                 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
2891                 AR5K_RX_FILTER_MCAST);
2892
2893         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
2894                 if (*new_flags & FIF_PROMISC_IN_BSS) {
2895                         rfilt |= AR5K_RX_FILTER_PROM;
2896                         __set_bit(ATH_STAT_PROMISC, sc->status);
2897                 }
2898                 else
2899                         __clear_bit(ATH_STAT_PROMISC, sc->status);
2900         }
2901
2902         /* Note, AR5K_RX_FILTER_MCAST is already enabled */
2903         if (*new_flags & FIF_ALLMULTI) {
2904                 mfilt[0] =  ~0;
2905                 mfilt[1] =  ~0;
2906         } else {
2907                 for (i = 0; i < mc_count; i++) {
2908                         if (!mclist)
2909                                 break;
2910                         /* calculate XOR of eight 6-bit values */
2911                         val = get_unaligned_le32(mclist->dmi_addr + 0);
2912                         pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2913                         val = get_unaligned_le32(mclist->dmi_addr + 3);
2914                         pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2915                         pos &= 0x3f;
2916                         mfilt[pos / 32] |= (1 << (pos % 32));
2917                         /* XXX: we might be able to just do this instead,
2918                         * but not sure, needs testing, if we do use this we'd
2919                         * neet to inform below to not reset the mcast */
2920                         /* ath5k_hw_set_mcast_filterindex(ah,
2921                          *      mclist->dmi_addr[5]); */
2922                         mclist = mclist->next;
2923                 }
2924         }
2925
2926         /* This is the best we can do */
2927         if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
2928                 rfilt |= AR5K_RX_FILTER_PHYERR;
2929
2930         /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
2931         * and probes for any BSSID, this needs testing */
2932         if (*new_flags & FIF_BCN_PRBRESP_PROMISC)
2933                 rfilt |= AR5K_RX_FILTER_BEACON | AR5K_RX_FILTER_PROBEREQ;
2934
2935         /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
2936          * set we should only pass on control frames for this
2937          * station. This needs testing. I believe right now this
2938          * enables *all* control frames, which is OK.. but
2939          * but we should see if we can improve on granularity */
2940         if (*new_flags & FIF_CONTROL)
2941                 rfilt |= AR5K_RX_FILTER_CONTROL;
2942
2943         /* Additional settings per mode -- this is per ath5k */
2944
2945         /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
2946
2947         if (sc->opmode == NL80211_IFTYPE_MONITOR)
2948                 rfilt |= AR5K_RX_FILTER_CONTROL | AR5K_RX_FILTER_BEACON |
2949                         AR5K_RX_FILTER_PROBEREQ | AR5K_RX_FILTER_PROM;
2950         if (sc->opmode != NL80211_IFTYPE_STATION)
2951                 rfilt |= AR5K_RX_FILTER_PROBEREQ;
2952         if (sc->opmode != NL80211_IFTYPE_AP &&
2953                 sc->opmode != NL80211_IFTYPE_MESH_POINT &&
2954                 test_bit(ATH_STAT_PROMISC, sc->status))
2955                 rfilt |= AR5K_RX_FILTER_PROM;
2956         if (sc->opmode == NL80211_IFTYPE_STATION ||
2957                 sc->opmode == NL80211_IFTYPE_ADHOC) {
2958                 rfilt |= AR5K_RX_FILTER_BEACON;
2959         }
2960
2961         /* Set filters */
2962         ath5k_hw_set_rx_filter(ah,rfilt);
2963
2964         /* Set multicast bits */
2965         ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
2966         /* Set the cached hw filter flags, this will alter actually
2967          * be set in HW */
2968         sc->filter_flags = rfilt;
2969 }
2970
2971 static int
2972 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2973                 const u8 *local_addr, const u8 *addr,
2974                 struct ieee80211_key_conf *key)
2975 {
2976         struct ath5k_softc *sc = hw->priv;
2977         int ret = 0;
2978
2979         switch(key->alg) {
2980         case ALG_WEP:
2981         /* XXX: fix hardware encryption, its not working. For now
2982          * allow software encryption */
2983                 /* break; */
2984         case ALG_TKIP:
2985         case ALG_CCMP:
2986                 return -EOPNOTSUPP;
2987         default:
2988                 WARN_ON(1);
2989                 return -EINVAL;
2990         }
2991
2992         mutex_lock(&sc->lock);
2993
2994         switch (cmd) {
2995         case SET_KEY:
2996                 ret = ath5k_hw_set_key(sc->ah, key->keyidx, key, addr);
2997                 if (ret) {
2998                         ATH5K_ERR(sc, "can't set the key\n");
2999                         goto unlock;
3000                 }
3001                 __set_bit(key->keyidx, sc->keymap);
3002                 key->hw_key_idx = key->keyidx;
3003                 break;
3004         case DISABLE_KEY:
3005                 ath5k_hw_reset_key(sc->ah, key->keyidx);
3006                 __clear_bit(key->keyidx, sc->keymap);
3007                 break;
3008         default:
3009                 ret = -EINVAL;
3010                 goto unlock;
3011         }
3012
3013 unlock:
3014         mmiowb();
3015         mutex_unlock(&sc->lock);
3016         return ret;
3017 }
3018
3019 static int
3020 ath5k_get_stats(struct ieee80211_hw *hw,
3021                 struct ieee80211_low_level_stats *stats)
3022 {
3023         struct ath5k_softc *sc = hw->priv;
3024         struct ath5k_hw *ah = sc->ah;
3025
3026         /* Force update */
3027         ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
3028
3029         memcpy(stats, &sc->ll_stats, sizeof(sc->ll_stats));
3030
3031         return 0;
3032 }
3033
3034 static int
3035 ath5k_get_tx_stats(struct ieee80211_hw *hw,
3036                 struct ieee80211_tx_queue_stats *stats)
3037 {
3038         struct ath5k_softc *sc = hw->priv;
3039
3040         memcpy(stats, &sc->tx_stats, sizeof(sc->tx_stats));
3041
3042         return 0;
3043 }
3044
3045 static u64
3046 ath5k_get_tsf(struct ieee80211_hw *hw)
3047 {
3048         struct ath5k_softc *sc = hw->priv;
3049
3050         return ath5k_hw_get_tsf64(sc->ah);
3051 }
3052
3053 static void
3054 ath5k_reset_tsf(struct ieee80211_hw *hw)
3055 {
3056         struct ath5k_softc *sc = hw->priv;
3057
3058         /*
3059          * in IBSS mode we need to update the beacon timers too.
3060          * this will also reset the TSF if we call it with 0
3061          */
3062         if (sc->opmode == NL80211_IFTYPE_ADHOC)
3063                 ath5k_beacon_update_timers(sc, 0);
3064         else
3065                 ath5k_hw_reset_tsf(sc->ah);
3066 }
3067
3068 static int
3069 ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3070 {
3071         struct ath5k_softc *sc = hw->priv;
3072         unsigned long flags;
3073         int ret;
3074
3075         ath5k_debug_dump_skb(sc, skb, "BC  ", 1);
3076
3077         if (sc->opmode != NL80211_IFTYPE_ADHOC) {
3078                 ret = -EIO;
3079                 goto end;
3080         }
3081
3082         spin_lock_irqsave(&sc->block, flags);
3083         ath5k_txbuf_free(sc, sc->bbuf);
3084         sc->bbuf->skb = skb;
3085         ret = ath5k_beacon_setup(sc, sc->bbuf);
3086         if (ret)
3087                 sc->bbuf->skb = NULL;
3088         spin_unlock_irqrestore(&sc->block, flags);
3089         if (!ret) {
3090                 ath5k_beacon_config(sc);
3091                 mmiowb();
3092         }
3093
3094 end:
3095         return ret;
3096 }
3097