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rtlwifi: usb: use usb_alloc_coherent for RX buffers
[deliverable/linux.git] / drivers / net / wireless / rtlwifi / usb.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2012 Realtek Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 *****************************************************************************/
27
28 #include "wifi.h"
29 #include "core.h"
30 #include "usb.h"
31 #include "base.h"
32 #include "ps.h"
33 #include "rtl8192c/fw_common.h"
34 #include <linux/export.h>
35
36 #define REALTEK_USB_VENQT_READ 0xC0
37 #define REALTEK_USB_VENQT_WRITE 0x40
38 #define REALTEK_USB_VENQT_CMD_REQ 0x05
39 #define REALTEK_USB_VENQT_CMD_IDX 0x00
40
41 #define MAX_USBCTRL_VENDORREQ_TIMES 10
42
43 static void usbctrl_async_callback(struct urb *urb)
44 {
45 if (urb) {
46 /* free dr */
47 kfree(urb->setup_packet);
48 /* free databuf */
49 kfree(urb->transfer_buffer);
50 }
51 }
52
53 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
54 u16 value, u16 index, void *pdata,
55 u16 len)
56 {
57 int rc;
58 unsigned int pipe;
59 u8 reqtype;
60 struct usb_ctrlrequest *dr;
61 struct urb *urb;
62 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
63 u8 *databuf;
64
65 if (WARN_ON_ONCE(len > databuf_maxlen))
66 len = databuf_maxlen;
67
68 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
69 reqtype = REALTEK_USB_VENQT_WRITE;
70
71 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
72 if (!dr)
73 return -ENOMEM;
74
75 databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
76 if (!databuf) {
77 kfree(dr);
78 return -ENOMEM;
79 }
80
81 urb = usb_alloc_urb(0, GFP_ATOMIC);
82 if (!urb) {
83 kfree(databuf);
84 kfree(dr);
85 return -ENOMEM;
86 }
87
88 dr->bRequestType = reqtype;
89 dr->bRequest = request;
90 dr->wValue = cpu_to_le16(value);
91 dr->wIndex = cpu_to_le16(index);
92 dr->wLength = cpu_to_le16(len);
93 /* data are already in little-endian order */
94 memcpy(databuf, pdata, len);
95 usb_fill_control_urb(urb, udev, pipe,
96 (unsigned char *)dr, databuf, len,
97 usbctrl_async_callback, NULL);
98 rc = usb_submit_urb(urb, GFP_ATOMIC);
99 if (rc < 0) {
100 kfree(databuf);
101 kfree(dr);
102 }
103 usb_free_urb(urb);
104 return rc;
105 }
106
107 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
108 u16 value, u16 index, void *pdata,
109 u16 len)
110 {
111 unsigned int pipe;
112 int status;
113 u8 reqtype;
114 int vendorreq_times = 0;
115 static int count;
116
117 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
118 reqtype = REALTEK_USB_VENQT_READ;
119
120 do {
121 status = usb_control_msg(udev, pipe, request, reqtype, value,
122 index, pdata, len, 0); /*max. timeout*/
123 if (status < 0) {
124 /* firmware download is checksumed, don't retry */
125 if ((value >= FW_8192C_START_ADDRESS &&
126 value <= FW_8192C_END_ADDRESS))
127 break;
128 } else {
129 break;
130 }
131 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
132
133 if (status < 0 && count++ < 4)
134 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
135 value, status, *(u32 *)pdata);
136 return status;
137 }
138
139 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
140 {
141 struct device *dev = rtlpriv->io.dev;
142 struct usb_device *udev = to_usb_device(dev);
143 u8 request;
144 u16 wvalue;
145 u16 index;
146 __le32 *data;
147 unsigned long flags;
148
149 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
150 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
151 rtlpriv->usb_data_index = 0;
152 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
153 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
154 request = REALTEK_USB_VENQT_CMD_REQ;
155 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
156
157 wvalue = (u16)addr;
158 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
159 return le32_to_cpu(*data);
160 }
161
162 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
163 {
164 return (u8)_usb_read_sync(rtlpriv, addr, 1);
165 }
166
167 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
168 {
169 return (u16)_usb_read_sync(rtlpriv, addr, 2);
170 }
171
172 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
173 {
174 return _usb_read_sync(rtlpriv, addr, 4);
175 }
176
177 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
178 u16 len)
179 {
180 u8 request;
181 u16 wvalue;
182 u16 index;
183 __le32 data;
184
185 request = REALTEK_USB_VENQT_CMD_REQ;
186 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
187 wvalue = (u16)(addr&0x0000ffff);
188 data = cpu_to_le32(val);
189 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
190 len);
191 }
192
193 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
194 {
195 struct device *dev = rtlpriv->io.dev;
196
197 _usb_write_async(to_usb_device(dev), addr, val, 1);
198 }
199
200 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
201 {
202 struct device *dev = rtlpriv->io.dev;
203
204 _usb_write_async(to_usb_device(dev), addr, val, 2);
205 }
206
207 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
208 {
209 struct device *dev = rtlpriv->io.dev;
210
211 _usb_write_async(to_usb_device(dev), addr, val, 4);
212 }
213
214 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
215 u16 len)
216 {
217 struct device *dev = rtlpriv->io.dev;
218 struct usb_device *udev = to_usb_device(dev);
219 u8 request = REALTEK_USB_VENQT_CMD_REQ;
220 u8 reqtype = REALTEK_USB_VENQT_WRITE;
221 u16 wvalue;
222 u16 index = REALTEK_USB_VENQT_CMD_IDX;
223 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
224 u8 *buffer;
225
226 wvalue = (u16)(addr & 0x0000ffff);
227 buffer = kmemdup(data, len, GFP_ATOMIC);
228 if (!buffer)
229 return;
230 usb_control_msg(udev, pipe, request, reqtype, wvalue,
231 index, buffer, len, 50);
232
233 kfree(buffer);
234 }
235
236 static void _rtl_usb_io_handler_init(struct device *dev,
237 struct ieee80211_hw *hw)
238 {
239 struct rtl_priv *rtlpriv = rtl_priv(hw);
240
241 rtlpriv->io.dev = dev;
242 mutex_init(&rtlpriv->io.bb_mutex);
243 rtlpriv->io.write8_async = _usb_write8_async;
244 rtlpriv->io.write16_async = _usb_write16_async;
245 rtlpriv->io.write32_async = _usb_write32_async;
246 rtlpriv->io.read8_sync = _usb_read8_sync;
247 rtlpriv->io.read16_sync = _usb_read16_sync;
248 rtlpriv->io.read32_sync = _usb_read32_sync;
249 rtlpriv->io.writeN_sync = _usb_writeN_sync;
250 }
251
252 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
253 {
254 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
255
256 mutex_destroy(&rtlpriv->io.bb_mutex);
257 }
258
259 /**
260 *
261 * Default aggregation handler. Do nothing and just return the oldest skb.
262 */
263 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
264 struct sk_buff_head *list)
265 {
266 return skb_dequeue(list);
267 }
268
269 #define IS_HIGH_SPEED_USB(udev) \
270 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
271
272 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
273 {
274 u32 i;
275 struct rtl_priv *rtlpriv = rtl_priv(hw);
276 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
277
278 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
279 ? USB_HIGH_SPEED_BULK_SIZE
280 : USB_FULL_SPEED_BULK_SIZE;
281
282 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
283 rtlusb->max_bulk_out_size);
284
285 for (i = 0; i < __RTL_TXQ_NUM; i++) {
286 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
287 if (!ep_num) {
288 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
289 "Invalid endpoint map setting!\n");
290 return -EINVAL;
291 }
292 }
293
294 rtlusb->usb_tx_post_hdl =
295 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
296 rtlusb->usb_tx_cleanup =
297 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
298 rtlusb->usb_tx_aggregate_hdl =
299 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
300 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
301 : &_none_usb_tx_aggregate_hdl;
302
303 init_usb_anchor(&rtlusb->tx_submitted);
304 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
305 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
306 init_usb_anchor(&rtlusb->tx_pending[i]);
307 }
308 return 0;
309 }
310
311 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
312 {
313 struct rtl_priv *rtlpriv = rtl_priv(hw);
314 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
315 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
316
317 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
318 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
319 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
320 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
321 rtlusb->usb_rx_segregate_hdl =
322 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
323
324 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
325 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
326 init_usb_anchor(&rtlusb->rx_submitted);
327 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
328 return 0;
329 }
330
331 static int _rtl_usb_init(struct ieee80211_hw *hw)
332 {
333 struct rtl_priv *rtlpriv = rtl_priv(hw);
334 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
335 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
336 int err;
337 u8 epidx;
338 struct usb_interface *usb_intf = rtlusb->intf;
339 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
340
341 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
342 for (epidx = 0; epidx < epnums; epidx++) {
343 struct usb_endpoint_descriptor *pep_desc;
344 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
345
346 if (usb_endpoint_dir_in(pep_desc))
347 rtlusb->in_ep_nums++;
348 else if (usb_endpoint_dir_out(pep_desc))
349 rtlusb->out_ep_nums++;
350
351 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
352 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
353 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
354 pep_desc->bInterval);
355 }
356 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
357 pr_err("Too few input end points found\n");
358 return -EINVAL;
359 }
360 if (rtlusb->out_ep_nums == 0) {
361 pr_err("No output end points found\n");
362 return -EINVAL;
363 }
364 /* usb endpoint mapping */
365 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
366 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
367 _rtl_usb_init_tx(hw);
368 _rtl_usb_init_rx(hw);
369 return err;
370 }
371
372 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
373 {
374 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
375 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
376 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
377 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
378
379 rtlhal->hw = hw;
380 ppsc->inactiveps = false;
381 ppsc->leisure_ps = false;
382 ppsc->fwctrl_lps = false;
383 ppsc->reg_fwctrl_lps = 3;
384 ppsc->reg_max_lps_awakeintvl = 5;
385 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
386
387 /* IBSS */
388 mac->beacon_interval = 100;
389
390 /* AMPDU */
391 mac->min_space_cfg = 0;
392 mac->max_mss_density = 0;
393
394 /* set sane AMPDU defaults */
395 mac->current_ampdu_density = 7;
396 mac->current_ampdu_factor = 3;
397
398 /* QOS */
399 rtlusb->acm_method = eAcmWay2_SW;
400
401 /* IRQ */
402 /* HIMR - turn all on */
403 rtlusb->irq_mask[0] = 0xFFFFFFFF;
404 /* HIMR_EX - turn all on */
405 rtlusb->irq_mask[1] = 0xFFFFFFFF;
406 rtlusb->disableHWSM = true;
407 }
408
409 static void _rtl_rx_completed(struct urb *urb);
410
411 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
412 struct urb *urb, gfp_t gfp_mask)
413 {
414 struct rtl_priv *rtlpriv = rtl_priv(hw);
415 void *buf;
416
417 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
418 &urb->transfer_dma);
419 if (!buf) {
420 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
421 "Failed to usb_alloc_coherent!!\n");
422 return -ENOMEM;
423 }
424
425 usb_fill_bulk_urb(urb, rtlusb->udev,
426 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
427 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
428 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
429
430 return 0;
431 }
432
433 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
434 struct sk_buff *skb)
435 {
436 struct rtl_priv *rtlpriv = rtl_priv(hw);
437 u8 *rxdesc = skb->data;
438 struct ieee80211_hdr *hdr;
439 bool unicast = false;
440 __le16 fc;
441 struct ieee80211_rx_status rx_status = {0};
442 struct rtl_stats stats = {
443 .signal = 0,
444 .noise = -98,
445 .rate = 0,
446 };
447
448 skb_pull(skb, RTL_RX_DESC_SIZE);
449 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
450 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
451 hdr = (struct ieee80211_hdr *)(skb->data);
452 fc = hdr->frame_control;
453 if (!stats.crc) {
454 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
455
456 if (is_broadcast_ether_addr(hdr->addr1)) {
457 /*TODO*/;
458 } else if (is_multicast_ether_addr(hdr->addr1)) {
459 /*TODO*/
460 } else {
461 unicast = true;
462 rtlpriv->stats.rxbytesunicast += skb->len;
463 }
464
465 rtl_is_special_data(hw, skb, false);
466
467 if (ieee80211_is_data(fc)) {
468 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
469
470 if (unicast)
471 rtlpriv->link_info.num_rx_inperiod++;
472 }
473 }
474 }
475
476 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
477 struct sk_buff *skb)
478 {
479 struct rtl_priv *rtlpriv = rtl_priv(hw);
480 u8 *rxdesc = skb->data;
481 struct ieee80211_hdr *hdr;
482 bool unicast = false;
483 __le16 fc;
484 struct ieee80211_rx_status rx_status = {0};
485 struct rtl_stats stats = {
486 .signal = 0,
487 .noise = -98,
488 .rate = 0,
489 };
490
491 skb_pull(skb, RTL_RX_DESC_SIZE);
492 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
493 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
494 hdr = (struct ieee80211_hdr *)(skb->data);
495 fc = hdr->frame_control;
496 if (!stats.crc) {
497 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
498
499 if (is_broadcast_ether_addr(hdr->addr1)) {
500 /*TODO*/;
501 } else if (is_multicast_ether_addr(hdr->addr1)) {
502 /*TODO*/
503 } else {
504 unicast = true;
505 rtlpriv->stats.rxbytesunicast += skb->len;
506 }
507
508 rtl_is_special_data(hw, skb, false);
509
510 if (ieee80211_is_data(fc)) {
511 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
512
513 if (unicast)
514 rtlpriv->link_info.num_rx_inperiod++;
515 }
516 if (likely(rtl_action_proc(hw, skb, false))) {
517 struct sk_buff *uskb = NULL;
518 u8 *pdata;
519
520 uskb = dev_alloc_skb(skb->len + 128);
521 if (uskb) { /* drop packet on allocation failure */
522 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
523 sizeof(rx_status));
524 pdata = (u8 *)skb_put(uskb, skb->len);
525 memcpy(pdata, skb->data, skb->len);
526 ieee80211_rx_irqsafe(hw, uskb);
527 }
528 dev_kfree_skb_any(skb);
529 } else {
530 dev_kfree_skb_any(skb);
531 }
532 }
533 }
534
535 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
536 {
537 struct sk_buff *_skb;
538 struct sk_buff_head rx_queue;
539 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
540
541 skb_queue_head_init(&rx_queue);
542 if (rtlusb->usb_rx_segregate_hdl)
543 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
544 WARN_ON(skb_queue_empty(&rx_queue));
545 while (!skb_queue_empty(&rx_queue)) {
546 _skb = skb_dequeue(&rx_queue);
547 _rtl_usb_rx_process_agg(hw, _skb);
548 ieee80211_rx_irqsafe(hw, _skb);
549 }
550 }
551
552 #define __RADIO_TAP_SIZE_RSV 32
553
554 static void _rtl_rx_completed(struct urb *_urb)
555 {
556 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
557 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
558 struct rtl_priv *rtlpriv = rtl_priv(hw);
559 int err = 0;
560
561 if (unlikely(IS_USB_STOP(rtlusb)))
562 goto free;
563
564 if (likely(0 == _urb->status)) {
565 struct sk_buff *skb;
566 unsigned int size = _urb->actual_length;
567
568 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
569 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
570 "Too short packet from bulk IN! (len: %d)\n",
571 size);
572 goto resubmit;
573 }
574
575 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV);
576 if (!skb) {
577 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
578 "Can't allocate skb for bulk IN!\n");
579 goto resubmit;
580 }
581
582 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
583
584 /* reserve some space for mac80211's radiotap */
585 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
586
587 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
588
589 /* TODO: Do further processing in tasklet (queue skbs,
590 * schedule tasklet)
591 */
592
593 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
594 _rtl_usb_rx_process_noagg(hw, skb);
595 } else {
596 /* TO DO */
597 _rtl_rx_pre_process(hw, skb);
598 pr_err("rx agg not supported\n");
599 }
600
601 goto resubmit;
602 }
603
604 switch (_urb->status) {
605 /* disconnect */
606 case -ENOENT:
607 case -ECONNRESET:
608 case -ENODEV:
609 case -ESHUTDOWN:
610 goto free;
611 default:
612 break;
613 }
614
615 resubmit:
616 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
617 err = usb_submit_urb(_urb, GFP_ATOMIC);
618 if (unlikely(err)) {
619 usb_unanchor_urb(_urb);
620 goto free;
621 }
622 return;
623
624 free:
625 /* On some architectures, usb_free_coherent must not be called from
626 * hardirq context. Queue urb to cleanup list.
627 */
628 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
629 }
630
631 #undef __RADIO_TAP_SIZE_RSV
632
633 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
634 {
635 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
636 struct urb *urb;
637
638 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
639
640 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
641 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
642 urb->transfer_buffer, urb->transfer_dma);
643 usb_free_urb(urb);
644 }
645 }
646
647 static int _rtl_usb_receive(struct ieee80211_hw *hw)
648 {
649 struct urb *urb;
650 int err;
651 int i;
652 struct rtl_priv *rtlpriv = rtl_priv(hw);
653 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
654
655 WARN_ON(0 == rtlusb->rx_urb_num);
656 /* 1600 == 1514 + max WLAN header + rtk info */
657 WARN_ON(rtlusb->rx_max_size < 1600);
658
659 for (i = 0; i < rtlusb->rx_urb_num; i++) {
660 err = -ENOMEM;
661 urb = usb_alloc_urb(0, GFP_KERNEL);
662 if (!urb) {
663 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
664 "Failed to alloc URB!!\n");
665 goto err_out;
666 }
667
668 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
669 if (err < 0) {
670 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
671 "Failed to prep_rx_urb!!\n");
672 usb_free_urb(urb);
673 goto err_out;
674 }
675
676 usb_anchor_urb(urb, &rtlusb->rx_submitted);
677 err = usb_submit_urb(urb, GFP_KERNEL);
678 if (err)
679 goto err_out;
680 usb_free_urb(urb);
681 }
682 return 0;
683
684 err_out:
685 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
686 _rtl_usb_cleanup_rx(hw);
687 return err;
688 }
689
690 static int rtl_usb_start(struct ieee80211_hw *hw)
691 {
692 int err;
693 struct rtl_priv *rtlpriv = rtl_priv(hw);
694 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
695 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
696
697 err = rtlpriv->cfg->ops->hw_init(hw);
698 if (!err) {
699 rtl_init_rx_config(hw);
700
701 /* Enable software */
702 SET_USB_START(rtlusb);
703 /* should after adapter start and interrupt enable. */
704 set_hal_start(rtlhal);
705
706 /* Start bulk IN */
707 err = _rtl_usb_receive(hw);
708 }
709
710 return err;
711 }
712 /**
713 *
714 *
715 */
716
717 /*======================= tx =========================================*/
718 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
719 {
720 u32 i;
721 struct sk_buff *_skb;
722 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
723 struct ieee80211_tx_info *txinfo;
724
725 SET_USB_STOP(rtlusb);
726
727 /* clean up rx stuff. */
728 _rtl_usb_cleanup_rx(hw);
729
730 /* clean up tx stuff */
731 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
732 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
733 rtlusb->usb_tx_cleanup(hw, _skb);
734 txinfo = IEEE80211_SKB_CB(_skb);
735 ieee80211_tx_info_clear_status(txinfo);
736 txinfo->flags |= IEEE80211_TX_STAT_ACK;
737 ieee80211_tx_status_irqsafe(hw, _skb);
738 }
739 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
740 }
741 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
742 }
743
744 /**
745 *
746 * We may add some struct into struct rtl_usb later. Do deinit here.
747 *
748 */
749 static void rtl_usb_deinit(struct ieee80211_hw *hw)
750 {
751 rtl_usb_cleanup(hw);
752 }
753
754 static void rtl_usb_stop(struct ieee80211_hw *hw)
755 {
756 struct rtl_priv *rtlpriv = rtl_priv(hw);
757 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
758 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
759
760 /* should after adapter start and interrupt enable. */
761 set_hal_stop(rtlhal);
762 /* Enable software */
763 SET_USB_STOP(rtlusb);
764 rtl_usb_deinit(hw);
765 rtlpriv->cfg->ops->hw_disable(hw);
766 }
767
768 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
769 {
770 int err;
771 struct rtl_priv *rtlpriv = rtl_priv(hw);
772 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
773
774 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
775 err = usb_submit_urb(_urb, GFP_ATOMIC);
776 if (err < 0) {
777 struct sk_buff *skb;
778
779 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
780 "Failed to submit urb\n");
781 usb_unanchor_urb(_urb);
782 skb = (struct sk_buff *)_urb->context;
783 kfree_skb(skb);
784 }
785 usb_free_urb(_urb);
786 }
787
788 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
789 struct sk_buff *skb)
790 {
791 struct rtl_priv *rtlpriv = rtl_priv(hw);
792 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
793 struct ieee80211_tx_info *txinfo;
794
795 rtlusb->usb_tx_post_hdl(hw, urb, skb);
796 skb_pull(skb, RTL_TX_HEADER_SIZE);
797 txinfo = IEEE80211_SKB_CB(skb);
798 ieee80211_tx_info_clear_status(txinfo);
799 txinfo->flags |= IEEE80211_TX_STAT_ACK;
800
801 if (urb->status) {
802 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
803 "Urb has error status 0x%X\n", urb->status);
804 goto out;
805 }
806 /* TODO: statistics */
807 out:
808 ieee80211_tx_status_irqsafe(hw, skb);
809 return urb->status;
810 }
811
812 static void _rtl_tx_complete(struct urb *urb)
813 {
814 struct sk_buff *skb = (struct sk_buff *)urb->context;
815 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
816 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
817 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
818 int err;
819
820 if (unlikely(IS_USB_STOP(rtlusb)))
821 return;
822 err = _usb_tx_post(hw, urb, skb);
823 if (err) {
824 /* Ignore error and keep issuiing other urbs */
825 return;
826 }
827 }
828
829 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
830 struct sk_buff *skb, u32 ep_num)
831 {
832 struct rtl_priv *rtlpriv = rtl_priv(hw);
833 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
834 struct urb *_urb;
835
836 WARN_ON(NULL == skb);
837 _urb = usb_alloc_urb(0, GFP_ATOMIC);
838 if (!_urb) {
839 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
840 "Can't allocate URB for bulk out!\n");
841 kfree_skb(skb);
842 return NULL;
843 }
844 _rtl_install_trx_info(rtlusb, skb, ep_num);
845 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
846 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
847 _urb->transfer_flags |= URB_ZERO_PACKET;
848 return _urb;
849 }
850
851 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
852 enum rtl_txq qnum)
853 {
854 struct rtl_priv *rtlpriv = rtl_priv(hw);
855 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
856 u32 ep_num;
857 struct urb *_urb = NULL;
858 struct sk_buff *_skb = NULL;
859
860 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
861 if (unlikely(IS_USB_STOP(rtlusb))) {
862 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
863 "USB device is stopping...\n");
864 kfree_skb(skb);
865 return;
866 }
867 ep_num = rtlusb->ep_map.ep_mapping[qnum];
868 _skb = skb;
869 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
870 if (unlikely(!_urb)) {
871 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
872 "Can't allocate urb. Drop skb!\n");
873 return;
874 }
875 _rtl_submit_tx_urb(hw, _urb);
876 }
877
878 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
879 struct ieee80211_sta *sta,
880 struct sk_buff *skb,
881 u16 hw_queue)
882 {
883 struct rtl_priv *rtlpriv = rtl_priv(hw);
884 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
885 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
886 struct rtl_tx_desc *pdesc = NULL;
887 struct rtl_tcb_desc tcb_desc;
888 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
889 __le16 fc = hdr->frame_control;
890 u8 *pda_addr = hdr->addr1;
891 /* ssn */
892 u8 *qc = NULL;
893 u8 tid = 0;
894 u16 seq_number = 0;
895
896 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
897 if (ieee80211_is_auth(fc)) {
898 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
899 rtl_ips_nic_on(hw);
900 }
901
902 if (rtlpriv->psc.sw_ps_enabled) {
903 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
904 !ieee80211_has_pm(fc))
905 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
906 }
907
908 rtl_action_proc(hw, skb, true);
909 if (is_multicast_ether_addr(pda_addr))
910 rtlpriv->stats.txbytesmulticast += skb->len;
911 else if (is_broadcast_ether_addr(pda_addr))
912 rtlpriv->stats.txbytesbroadcast += skb->len;
913 else
914 rtlpriv->stats.txbytesunicast += skb->len;
915 if (ieee80211_is_data_qos(fc)) {
916 qc = ieee80211_get_qos_ctl(hdr);
917 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
918 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
919 IEEE80211_SCTL_SEQ) >> 4;
920 seq_number += 1;
921 seq_number <<= 4;
922 }
923 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
924 hw_queue, &tcb_desc);
925 if (!ieee80211_has_morefrags(hdr->frame_control)) {
926 if (qc)
927 mac->tids[tid].seq_number = seq_number;
928 }
929 if (ieee80211_is_data(fc))
930 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
931 }
932
933 static int rtl_usb_tx(struct ieee80211_hw *hw,
934 struct ieee80211_sta *sta,
935 struct sk_buff *skb,
936 struct rtl_tcb_desc *dummy)
937 {
938 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
939 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
940 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
941 __le16 fc = hdr->frame_control;
942 u16 hw_queue;
943
944 if (unlikely(is_hal_stop(rtlhal)))
945 goto err_free;
946 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
947 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
948 _rtl_usb_transmit(hw, skb, hw_queue);
949 return NETDEV_TX_OK;
950
951 err_free:
952 dev_kfree_skb_any(skb);
953 return NETDEV_TX_OK;
954 }
955
956 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
957 struct ieee80211_sta *sta,
958 struct sk_buff *skb)
959 {
960 return false;
961 }
962
963 static struct rtl_intf_ops rtl_usb_ops = {
964 .adapter_start = rtl_usb_start,
965 .adapter_stop = rtl_usb_stop,
966 .adapter_tx = rtl_usb_tx,
967 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
968 };
969
970 int rtl_usb_probe(struct usb_interface *intf,
971 const struct usb_device_id *id,
972 struct rtl_hal_cfg *rtl_hal_cfg)
973 {
974 int err;
975 struct ieee80211_hw *hw = NULL;
976 struct rtl_priv *rtlpriv = NULL;
977 struct usb_device *udev;
978 struct rtl_usb_priv *usb_priv;
979
980 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
981 sizeof(struct rtl_usb_priv), &rtl_ops);
982 if (!hw) {
983 RT_ASSERT(false, "ieee80211 alloc failed\n");
984 return -ENOMEM;
985 }
986 rtlpriv = hw->priv;
987 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
988 GFP_KERNEL);
989 if (!rtlpriv->usb_data)
990 return -ENOMEM;
991
992 /* this spin lock must be initialized early */
993 spin_lock_init(&rtlpriv->locks.usb_lock);
994
995 rtlpriv->usb_data_index = 0;
996 init_completion(&rtlpriv->firmware_loading_complete);
997 SET_IEEE80211_DEV(hw, &intf->dev);
998 udev = interface_to_usbdev(intf);
999 usb_get_dev(udev);
1000 usb_priv = rtl_usbpriv(hw);
1001 memset(usb_priv, 0, sizeof(*usb_priv));
1002 usb_priv->dev.intf = intf;
1003 usb_priv->dev.udev = udev;
1004 usb_set_intfdata(intf, hw);
1005 /* init cfg & intf_ops */
1006 rtlpriv->rtlhal.interface = INTF_USB;
1007 rtlpriv->cfg = rtl_hal_cfg;
1008 rtlpriv->intf_ops = &rtl_usb_ops;
1009 rtl_dbgp_flag_init(hw);
1010 /* Init IO handler */
1011 _rtl_usb_io_handler_init(&udev->dev, hw);
1012 rtlpriv->cfg->ops->read_chip_version(hw);
1013 /*like read eeprom and so on */
1014 rtlpriv->cfg->ops->read_eeprom_info(hw);
1015 err = _rtl_usb_init(hw);
1016 if (err)
1017 goto error_out;
1018 rtl_usb_init_sw(hw);
1019 /* Init mac80211 sw */
1020 err = rtl_init_core(hw);
1021 if (err) {
1022 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1023 "Can't allocate sw for mac80211\n");
1024 goto error_out;
1025 }
1026 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1027 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1028 goto error_out;
1029 }
1030 rtlpriv->cfg->ops->init_sw_leds(hw);
1031
1032 return 0;
1033 error_out:
1034 rtl_deinit_core(hw);
1035 _rtl_usb_io_handler_release(hw);
1036 usb_put_dev(udev);
1037 complete(&rtlpriv->firmware_loading_complete);
1038 return -ENODEV;
1039 }
1040 EXPORT_SYMBOL(rtl_usb_probe);
1041
1042 void rtl_usb_disconnect(struct usb_interface *intf)
1043 {
1044 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1045 struct rtl_priv *rtlpriv = rtl_priv(hw);
1046 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1047 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1048
1049 if (unlikely(!rtlpriv))
1050 return;
1051
1052 /* just in case driver is removed before firmware callback */
1053 wait_for_completion(&rtlpriv->firmware_loading_complete);
1054 /*ieee80211_unregister_hw will call ops_stop */
1055 if (rtlmac->mac80211_registered == 1) {
1056 ieee80211_unregister_hw(hw);
1057 rtlmac->mac80211_registered = 0;
1058 } else {
1059 rtl_deinit_deferred_work(hw);
1060 rtlpriv->intf_ops->adapter_stop(hw);
1061 }
1062 /*deinit rfkill */
1063 /* rtl_deinit_rfkill(hw); */
1064 rtl_usb_deinit(hw);
1065 rtl_deinit_core(hw);
1066 kfree(rtlpriv->usb_data);
1067 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1068 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1069 _rtl_usb_io_handler_release(hw);
1070 usb_put_dev(rtlusb->udev);
1071 usb_set_intfdata(intf, NULL);
1072 ieee80211_free_hw(hw);
1073 }
1074 EXPORT_SYMBOL(rtl_usb_disconnect);
1075
1076 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1077 {
1078 return 0;
1079 }
1080 EXPORT_SYMBOL(rtl_usb_suspend);
1081
1082 int rtl_usb_resume(struct usb_interface *pusb_intf)
1083 {
1084 return 0;
1085 }
1086 EXPORT_SYMBOL(rtl_usb_resume);
Linux kernel - Deliverables
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