Commit | Line | Data |
---|---|---|
5100d5ac MB |
1 | /* |
2 | ||
3 | Broadcom B43 wireless driver | |
4 | ||
5 | PIO data transfer | |
6 | ||
7 | Copyright (c) 2005-2008 Michael Buesch <mb@bu3sch.de> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; see the file COPYING. If not, write to | |
21 | the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, | |
22 | Boston, MA 02110-1301, USA. | |
23 | ||
24 | */ | |
25 | ||
26 | #include "b43.h" | |
27 | #include "pio.h" | |
28 | #include "dma.h" | |
29 | #include "main.h" | |
30 | #include "xmit.h" | |
31 | ||
32 | #include <linux/delay.h> | |
33 | ||
34 | ||
5100d5ac MB |
35 | static u16 generate_cookie(struct b43_pio_txqueue *q, |
36 | struct b43_pio_txpacket *pack) | |
37 | { | |
38 | u16 cookie; | |
39 | ||
40 | /* Use the upper 4 bits of the cookie as | |
41 | * PIO controller ID and store the packet index number | |
42 | * in the lower 12 bits. | |
43 | * Note that the cookie must never be 0, as this | |
44 | * is a special value used in RX path. | |
45 | * It can also not be 0xFFFF because that is special | |
46 | * for multicast frames. | |
47 | */ | |
48 | cookie = (((u16)q->index + 1) << 12); | |
49 | cookie |= pack->index; | |
50 | ||
51 | return cookie; | |
52 | } | |
53 | ||
54 | static | |
99da185a JD |
55 | struct b43_pio_txqueue *parse_cookie(struct b43_wldev *dev, |
56 | u16 cookie, | |
5100d5ac MB |
57 | struct b43_pio_txpacket **pack) |
58 | { | |
59 | struct b43_pio *pio = &dev->pio; | |
60 | struct b43_pio_txqueue *q = NULL; | |
61 | unsigned int pack_index; | |
62 | ||
63 | switch (cookie & 0xF000) { | |
64 | case 0x1000: | |
65 | q = pio->tx_queue_AC_BK; | |
66 | break; | |
67 | case 0x2000: | |
68 | q = pio->tx_queue_AC_BE; | |
69 | break; | |
70 | case 0x3000: | |
71 | q = pio->tx_queue_AC_VI; | |
72 | break; | |
73 | case 0x4000: | |
74 | q = pio->tx_queue_AC_VO; | |
75 | break; | |
76 | case 0x5000: | |
77 | q = pio->tx_queue_mcast; | |
78 | break; | |
79 | } | |
80 | if (B43_WARN_ON(!q)) | |
81 | return NULL; | |
82 | pack_index = (cookie & 0x0FFF); | |
83 | if (B43_WARN_ON(pack_index >= ARRAY_SIZE(q->packets))) | |
84 | return NULL; | |
85 | *pack = &q->packets[pack_index]; | |
86 | ||
87 | return q; | |
88 | } | |
89 | ||
90 | static u16 index_to_pioqueue_base(struct b43_wldev *dev, | |
91 | unsigned int index) | |
92 | { | |
93 | static const u16 bases[] = { | |
94 | B43_MMIO_PIO_BASE0, | |
95 | B43_MMIO_PIO_BASE1, | |
96 | B43_MMIO_PIO_BASE2, | |
97 | B43_MMIO_PIO_BASE3, | |
98 | B43_MMIO_PIO_BASE4, | |
99 | B43_MMIO_PIO_BASE5, | |
100 | B43_MMIO_PIO_BASE6, | |
101 | B43_MMIO_PIO_BASE7, | |
102 | }; | |
103 | static const u16 bases_rev11[] = { | |
104 | B43_MMIO_PIO11_BASE0, | |
105 | B43_MMIO_PIO11_BASE1, | |
106 | B43_MMIO_PIO11_BASE2, | |
107 | B43_MMIO_PIO11_BASE3, | |
108 | B43_MMIO_PIO11_BASE4, | |
109 | B43_MMIO_PIO11_BASE5, | |
110 | }; | |
111 | ||
112 | if (dev->dev->id.revision >= 11) { | |
113 | B43_WARN_ON(index >= ARRAY_SIZE(bases_rev11)); | |
114 | return bases_rev11[index]; | |
115 | } | |
116 | B43_WARN_ON(index >= ARRAY_SIZE(bases)); | |
117 | return bases[index]; | |
118 | } | |
119 | ||
120 | static u16 pio_txqueue_offset(struct b43_wldev *dev) | |
121 | { | |
122 | if (dev->dev->id.revision >= 11) | |
123 | return 0x18; | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static u16 pio_rxqueue_offset(struct b43_wldev *dev) | |
128 | { | |
129 | if (dev->dev->id.revision >= 11) | |
130 | return 0x38; | |
131 | return 8; | |
132 | } | |
133 | ||
99da185a JD |
134 | static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev, |
135 | unsigned int index) | |
5100d5ac MB |
136 | { |
137 | struct b43_pio_txqueue *q; | |
138 | struct b43_pio_txpacket *p; | |
139 | unsigned int i; | |
140 | ||
141 | q = kzalloc(sizeof(*q), GFP_KERNEL); | |
142 | if (!q) | |
143 | return NULL; | |
5100d5ac MB |
144 | q->dev = dev; |
145 | q->rev = dev->dev->id.revision; | |
146 | q->mmio_base = index_to_pioqueue_base(dev, index) + | |
147 | pio_txqueue_offset(dev); | |
148 | q->index = index; | |
149 | ||
150 | q->free_packet_slots = B43_PIO_MAX_NR_TXPACKETS; | |
151 | if (q->rev >= 8) { | |
152 | q->buffer_size = 1920; //FIXME this constant is wrong. | |
153 | } else { | |
154 | q->buffer_size = b43_piotx_read16(q, B43_PIO_TXQBUFSIZE); | |
155 | q->buffer_size -= 80; | |
156 | } | |
157 | ||
158 | INIT_LIST_HEAD(&q->packets_list); | |
159 | for (i = 0; i < ARRAY_SIZE(q->packets); i++) { | |
160 | p = &(q->packets[i]); | |
161 | INIT_LIST_HEAD(&p->list); | |
162 | p->index = i; | |
163 | p->queue = q; | |
164 | list_add(&p->list, &q->packets_list); | |
165 | } | |
166 | ||
167 | return q; | |
168 | } | |
169 | ||
99da185a JD |
170 | static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev, |
171 | unsigned int index) | |
5100d5ac MB |
172 | { |
173 | struct b43_pio_rxqueue *q; | |
174 | ||
175 | q = kzalloc(sizeof(*q), GFP_KERNEL); | |
176 | if (!q) | |
177 | return NULL; | |
5100d5ac MB |
178 | q->dev = dev; |
179 | q->rev = dev->dev->id.revision; | |
180 | q->mmio_base = index_to_pioqueue_base(dev, index) + | |
181 | pio_rxqueue_offset(dev); | |
5100d5ac MB |
182 | |
183 | /* Enable Direct FIFO RX (PIO) on the engine. */ | |
184 | b43_dma_direct_fifo_rx(dev, index, 1); | |
185 | ||
186 | return q; | |
187 | } | |
188 | ||
189 | static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q) | |
190 | { | |
191 | struct b43_pio_txpacket *pack; | |
192 | unsigned int i; | |
193 | ||
194 | for (i = 0; i < ARRAY_SIZE(q->packets); i++) { | |
195 | pack = &(q->packets[i]); | |
196 | if (pack->skb) { | |
197 | dev_kfree_skb_any(pack->skb); | |
198 | pack->skb = NULL; | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | static void b43_destroy_pioqueue_tx(struct b43_pio_txqueue *q, | |
204 | const char *name) | |
205 | { | |
206 | if (!q) | |
207 | return; | |
208 | b43_pio_cancel_tx_packets(q); | |
209 | kfree(q); | |
210 | } | |
211 | ||
212 | static void b43_destroy_pioqueue_rx(struct b43_pio_rxqueue *q, | |
213 | const char *name) | |
214 | { | |
215 | if (!q) | |
216 | return; | |
217 | kfree(q); | |
218 | } | |
219 | ||
220 | #define destroy_queue_tx(pio, queue) do { \ | |
221 | b43_destroy_pioqueue_tx((pio)->queue, __stringify(queue)); \ | |
222 | (pio)->queue = NULL; \ | |
223 | } while (0) | |
224 | ||
225 | #define destroy_queue_rx(pio, queue) do { \ | |
226 | b43_destroy_pioqueue_rx((pio)->queue, __stringify(queue)); \ | |
227 | (pio)->queue = NULL; \ | |
228 | } while (0) | |
229 | ||
230 | void b43_pio_free(struct b43_wldev *dev) | |
231 | { | |
232 | struct b43_pio *pio; | |
233 | ||
234 | if (!b43_using_pio_transfers(dev)) | |
235 | return; | |
236 | pio = &dev->pio; | |
237 | ||
238 | destroy_queue_rx(pio, rx_queue); | |
239 | destroy_queue_tx(pio, tx_queue_mcast); | |
240 | destroy_queue_tx(pio, tx_queue_AC_VO); | |
241 | destroy_queue_tx(pio, tx_queue_AC_VI); | |
242 | destroy_queue_tx(pio, tx_queue_AC_BE); | |
243 | destroy_queue_tx(pio, tx_queue_AC_BK); | |
244 | } | |
245 | ||
5100d5ac MB |
246 | int b43_pio_init(struct b43_wldev *dev) |
247 | { | |
248 | struct b43_pio *pio = &dev->pio; | |
249 | int err = -ENOMEM; | |
250 | ||
251 | b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL) | |
252 | & ~B43_MACCTL_BE); | |
253 | b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_RXPADOFF, 0); | |
254 | ||
255 | pio->tx_queue_AC_BK = b43_setup_pioqueue_tx(dev, 0); | |
256 | if (!pio->tx_queue_AC_BK) | |
257 | goto out; | |
258 | ||
259 | pio->tx_queue_AC_BE = b43_setup_pioqueue_tx(dev, 1); | |
260 | if (!pio->tx_queue_AC_BE) | |
261 | goto err_destroy_bk; | |
262 | ||
263 | pio->tx_queue_AC_VI = b43_setup_pioqueue_tx(dev, 2); | |
264 | if (!pio->tx_queue_AC_VI) | |
265 | goto err_destroy_be; | |
266 | ||
267 | pio->tx_queue_AC_VO = b43_setup_pioqueue_tx(dev, 3); | |
268 | if (!pio->tx_queue_AC_VO) | |
269 | goto err_destroy_vi; | |
270 | ||
271 | pio->tx_queue_mcast = b43_setup_pioqueue_tx(dev, 4); | |
272 | if (!pio->tx_queue_mcast) | |
273 | goto err_destroy_vo; | |
274 | ||
275 | pio->rx_queue = b43_setup_pioqueue_rx(dev, 0); | |
276 | if (!pio->rx_queue) | |
277 | goto err_destroy_mcast; | |
278 | ||
279 | b43dbg(dev->wl, "PIO initialized\n"); | |
280 | err = 0; | |
281 | out: | |
282 | return err; | |
283 | ||
284 | err_destroy_mcast: | |
285 | destroy_queue_tx(pio, tx_queue_mcast); | |
286 | err_destroy_vo: | |
287 | destroy_queue_tx(pio, tx_queue_AC_VO); | |
288 | err_destroy_vi: | |
289 | destroy_queue_tx(pio, tx_queue_AC_VI); | |
290 | err_destroy_be: | |
291 | destroy_queue_tx(pio, tx_queue_AC_BE); | |
292 | err_destroy_bk: | |
293 | destroy_queue_tx(pio, tx_queue_AC_BK); | |
294 | return err; | |
295 | } | |
296 | ||
297 | /* Static mapping of mac80211's queues (priorities) to b43 PIO queues. */ | |
99da185a JD |
298 | static struct b43_pio_txqueue *select_queue_by_priority(struct b43_wldev *dev, |
299 | u8 queue_prio) | |
5100d5ac MB |
300 | { |
301 | struct b43_pio_txqueue *q; | |
302 | ||
403a3a13 | 303 | if (dev->qos_enabled) { |
5100d5ac MB |
304 | /* 0 = highest priority */ |
305 | switch (queue_prio) { | |
306 | default: | |
307 | B43_WARN_ON(1); | |
308 | /* fallthrough */ | |
309 | case 0: | |
310 | q = dev->pio.tx_queue_AC_VO; | |
311 | break; | |
312 | case 1: | |
313 | q = dev->pio.tx_queue_AC_VI; | |
314 | break; | |
315 | case 2: | |
316 | q = dev->pio.tx_queue_AC_BE; | |
317 | break; | |
318 | case 3: | |
319 | q = dev->pio.tx_queue_AC_BK; | |
320 | break; | |
321 | } | |
322 | } else | |
323 | q = dev->pio.tx_queue_AC_BE; | |
324 | ||
325 | return q; | |
326 | } | |
327 | ||
d8c17e15 MB |
328 | static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q, |
329 | u16 ctl, | |
330 | const void *_data, | |
331 | unsigned int data_len) | |
5100d5ac | 332 | { |
d8c17e15 | 333 | struct b43_wldev *dev = q->dev; |
7e937c63 | 334 | struct b43_wl *wl = dev->wl; |
5100d5ac | 335 | const u8 *data = _data; |
d8c17e15 MB |
336 | |
337 | ctl |= B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI; | |
338 | b43_piotx_write16(q, B43_PIO_TXCTL, ctl); | |
339 | ||
340 | ssb_block_write(dev->dev, data, (data_len & ~1), | |
341 | q->mmio_base + B43_PIO_TXDATA, | |
342 | sizeof(u16)); | |
343 | if (data_len & 1) { | |
88499ab3 MB |
344 | u8 *tail = wl->pio_tailspace; |
345 | BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2); | |
346 | ||
d8c17e15 MB |
347 | /* Write the last byte. */ |
348 | ctl &= ~B43_PIO_TXCTL_WRITEHI; | |
349 | b43_piotx_write16(q, B43_PIO_TXCTL, ctl); | |
88499ab3 MB |
350 | tail[0] = data[data_len - 1]; |
351 | tail[1] = 0; | |
352 | ssb_block_write(dev->dev, tail, 2, | |
b96ab540 MB |
353 | q->mmio_base + B43_PIO_TXDATA, |
354 | sizeof(u16)); | |
5100d5ac | 355 | } |
d8c17e15 MB |
356 | |
357 | return ctl; | |
5100d5ac MB |
358 | } |
359 | ||
360 | static void pio_tx_frame_2byte_queue(struct b43_pio_txpacket *pack, | |
361 | const u8 *hdr, unsigned int hdrlen) | |
362 | { | |
363 | struct b43_pio_txqueue *q = pack->queue; | |
364 | const char *frame = pack->skb->data; | |
365 | unsigned int frame_len = pack->skb->len; | |
366 | u16 ctl; | |
367 | ||
368 | ctl = b43_piotx_read16(q, B43_PIO_TXCTL); | |
369 | ctl |= B43_PIO_TXCTL_FREADY; | |
370 | ctl &= ~B43_PIO_TXCTL_EOF; | |
371 | ||
372 | /* Transfer the header data. */ | |
d8c17e15 | 373 | ctl = tx_write_2byte_queue(q, ctl, hdr, hdrlen); |
5100d5ac | 374 | /* Transfer the frame data. */ |
d8c17e15 | 375 | ctl = tx_write_2byte_queue(q, ctl, frame, frame_len); |
5100d5ac MB |
376 | |
377 | ctl |= B43_PIO_TXCTL_EOF; | |
378 | b43_piotx_write16(q, B43_PIO_TXCTL, ctl); | |
379 | } | |
380 | ||
d8c17e15 MB |
381 | static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q, |
382 | u32 ctl, | |
383 | const void *_data, | |
384 | unsigned int data_len) | |
5100d5ac | 385 | { |
d8c17e15 | 386 | struct b43_wldev *dev = q->dev; |
7e937c63 | 387 | struct b43_wl *wl = dev->wl; |
5100d5ac | 388 | const u8 *data = _data; |
d8c17e15 MB |
389 | |
390 | ctl |= B43_PIO8_TXCTL_0_7 | B43_PIO8_TXCTL_8_15 | | |
391 | B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_24_31; | |
392 | b43_piotx_write32(q, B43_PIO8_TXCTL, ctl); | |
393 | ||
394 | ssb_block_write(dev->dev, data, (data_len & ~3), | |
395 | q->mmio_base + B43_PIO8_TXDATA, | |
396 | sizeof(u32)); | |
397 | if (data_len & 3) { | |
88499ab3 MB |
398 | u8 *tail = wl->pio_tailspace; |
399 | BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4); | |
400 | ||
401 | memset(tail, 0, 4); | |
d8c17e15 MB |
402 | /* Write the last few bytes. */ |
403 | ctl &= ~(B43_PIO8_TXCTL_8_15 | B43_PIO8_TXCTL_16_23 | | |
404 | B43_PIO8_TXCTL_24_31); | |
d8c17e15 MB |
405 | switch (data_len & 3) { |
406 | case 3: | |
b96ab540 | 407 | ctl |= B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_8_15; |
88499ab3 MB |
408 | tail[0] = data[data_len - 3]; |
409 | tail[1] = data[data_len - 2]; | |
410 | tail[2] = data[data_len - 1]; | |
b96ab540 | 411 | break; |
d8c17e15 MB |
412 | case 2: |
413 | ctl |= B43_PIO8_TXCTL_8_15; | |
88499ab3 MB |
414 | tail[0] = data[data_len - 2]; |
415 | tail[1] = data[data_len - 1]; | |
b96ab540 | 416 | break; |
d8c17e15 | 417 | case 1: |
88499ab3 | 418 | tail[0] = data[data_len - 1]; |
b96ab540 | 419 | break; |
5100d5ac | 420 | } |
d8c17e15 | 421 | b43_piotx_write32(q, B43_PIO8_TXCTL, ctl); |
88499ab3 | 422 | ssb_block_write(dev->dev, tail, 4, |
b96ab540 MB |
423 | q->mmio_base + B43_PIO8_TXDATA, |
424 | sizeof(u32)); | |
5100d5ac | 425 | } |
d8c17e15 MB |
426 | |
427 | return ctl; | |
5100d5ac MB |
428 | } |
429 | ||
430 | static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack, | |
431 | const u8 *hdr, unsigned int hdrlen) | |
432 | { | |
433 | struct b43_pio_txqueue *q = pack->queue; | |
434 | const char *frame = pack->skb->data; | |
435 | unsigned int frame_len = pack->skb->len; | |
436 | u32 ctl; | |
437 | ||
438 | ctl = b43_piotx_read32(q, B43_PIO8_TXCTL); | |
439 | ctl |= B43_PIO8_TXCTL_FREADY; | |
440 | ctl &= ~B43_PIO8_TXCTL_EOF; | |
441 | ||
442 | /* Transfer the header data. */ | |
d8c17e15 | 443 | ctl = tx_write_4byte_queue(q, ctl, hdr, hdrlen); |
5100d5ac | 444 | /* Transfer the frame data. */ |
d8c17e15 | 445 | ctl = tx_write_4byte_queue(q, ctl, frame, frame_len); |
5100d5ac MB |
446 | |
447 | ctl |= B43_PIO8_TXCTL_EOF; | |
448 | b43_piotx_write32(q, B43_PIO_TXCTL, ctl); | |
449 | } | |
450 | ||
451 | static int pio_tx_frame(struct b43_pio_txqueue *q, | |
e039fa4a | 452 | struct sk_buff *skb) |
5100d5ac | 453 | { |
7e937c63 AH |
454 | struct b43_wldev *dev = q->dev; |
455 | struct b43_wl *wl = dev->wl; | |
5100d5ac | 456 | struct b43_pio_txpacket *pack; |
5100d5ac MB |
457 | u16 cookie; |
458 | int err; | |
459 | unsigned int hdrlen; | |
e039fa4a | 460 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
88499ab3 | 461 | struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace; |
5100d5ac MB |
462 | |
463 | B43_WARN_ON(list_empty(&q->packets_list)); | |
464 | pack = list_entry(q->packets_list.next, | |
465 | struct b43_pio_txpacket, list); | |
5100d5ac MB |
466 | |
467 | cookie = generate_cookie(q, pack); | |
7e937c63 | 468 | hdrlen = b43_txhdr_size(dev); |
88499ab3 MB |
469 | BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr)); |
470 | B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen); | |
471 | err = b43_generate_txhdr(dev, (u8 *)txhdr, skb, | |
035d0243 | 472 | info, cookie); |
5100d5ac MB |
473 | if (err) |
474 | return err; | |
475 | ||
e039fa4a | 476 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { |
5100d5ac MB |
477 | /* Tell the firmware about the cookie of the last |
478 | * mcast frame, so it can clear the more-data bit in it. */ | |
7e937c63 | 479 | b43_shm_write16(dev, B43_SHM_SHARED, |
5100d5ac MB |
480 | B43_SHM_SH_MCASTCOOKIE, cookie); |
481 | } | |
482 | ||
483 | pack->skb = skb; | |
484 | if (q->rev >= 8) | |
88499ab3 | 485 | pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen); |
5100d5ac | 486 | else |
88499ab3 | 487 | pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen); |
5100d5ac MB |
488 | |
489 | /* Remove it from the list of available packet slots. | |
490 | * It will be put back when we receive the status report. */ | |
491 | list_del(&pack->list); | |
492 | ||
493 | /* Update the queue statistics. */ | |
494 | q->buffer_used += roundup(skb->len + hdrlen, 4); | |
495 | q->free_packet_slots -= 1; | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
e039fa4a | 500 | int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb) |
5100d5ac MB |
501 | { |
502 | struct b43_pio_txqueue *q; | |
503 | struct ieee80211_hdr *hdr; | |
5100d5ac MB |
504 | unsigned int hdrlen, total_len; |
505 | int err = 0; | |
e039fa4a | 506 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5100d5ac MB |
507 | |
508 | hdr = (struct ieee80211_hdr *)skb->data; | |
e039fa4a JB |
509 | |
510 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { | |
5100d5ac MB |
511 | /* The multicast queue will be sent after the DTIM. */ |
512 | q = dev->pio.tx_queue_mcast; | |
513 | /* Set the frame More-Data bit. Ucode will clear it | |
514 | * for us on the last frame. */ | |
515 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
516 | } else { | |
517 | /* Decide by priority where to put this frame. */ | |
e2530083 | 518 | q = select_queue_by_priority(dev, skb_get_queue_mapping(skb)); |
5100d5ac MB |
519 | } |
520 | ||
5100d5ac MB |
521 | hdrlen = b43_txhdr_size(dev); |
522 | total_len = roundup(skb->len + hdrlen, 4); | |
523 | ||
524 | if (unlikely(total_len > q->buffer_size)) { | |
525 | err = -ENOBUFS; | |
526 | b43dbg(dev->wl, "PIO: TX packet longer than queue.\n"); | |
637dae3f | 527 | goto out; |
5100d5ac MB |
528 | } |
529 | if (unlikely(q->free_packet_slots == 0)) { | |
530 | err = -ENOBUFS; | |
531 | b43warn(dev->wl, "PIO: TX packet overflow.\n"); | |
637dae3f | 532 | goto out; |
5100d5ac MB |
533 | } |
534 | B43_WARN_ON(q->buffer_used > q->buffer_size); | |
535 | ||
536 | if (total_len > (q->buffer_size - q->buffer_used)) { | |
537 | /* Not enough memory on the queue. */ | |
538 | err = -EBUSY; | |
e2530083 | 539 | ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb)); |
5100d5ac | 540 | q->stopped = 1; |
637dae3f | 541 | goto out; |
5100d5ac MB |
542 | } |
543 | ||
544 | /* Assign the queue number to the ring (if not already done before) | |
545 | * so TX status handling can use it. The mac80211-queue to b43-queue | |
546 | * mapping is static, so we don't need to store it per frame. */ | |
e2530083 | 547 | q->queue_prio = skb_get_queue_mapping(skb); |
5100d5ac | 548 | |
e039fa4a | 549 | err = pio_tx_frame(q, skb); |
5100d5ac MB |
550 | if (unlikely(err == -ENOKEY)) { |
551 | /* Drop this packet, as we don't have the encryption key | |
552 | * anymore and must not transmit it unencrypted. */ | |
553 | dev_kfree_skb_any(skb); | |
554 | err = 0; | |
637dae3f | 555 | goto out; |
5100d5ac MB |
556 | } |
557 | if (unlikely(err)) { | |
558 | b43err(dev->wl, "PIO transmission failure\n"); | |
637dae3f | 559 | goto out; |
5100d5ac MB |
560 | } |
561 | q->nr_tx_packets++; | |
562 | ||
563 | B43_WARN_ON(q->buffer_used > q->buffer_size); | |
564 | if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) || | |
565 | (q->free_packet_slots == 0)) { | |
566 | /* The queue is full. */ | |
e2530083 | 567 | ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb)); |
5100d5ac MB |
568 | q->stopped = 1; |
569 | } | |
570 | ||
637dae3f | 571 | out: |
5100d5ac MB |
572 | return err; |
573 | } | |
574 | ||
5100d5ac MB |
575 | void b43_pio_handle_txstatus(struct b43_wldev *dev, |
576 | const struct b43_txstatus *status) | |
577 | { | |
578 | struct b43_pio_txqueue *q; | |
579 | struct b43_pio_txpacket *pack = NULL; | |
580 | unsigned int total_len; | |
e039fa4a | 581 | struct ieee80211_tx_info *info; |
5100d5ac MB |
582 | |
583 | q = parse_cookie(dev, status->cookie, &pack); | |
584 | if (unlikely(!q)) | |
585 | return; | |
586 | B43_WARN_ON(!pack); | |
587 | ||
14a7dd6f | 588 | info = IEEE80211_SKB_CB(pack->skb); |
e039fa4a | 589 | |
e6a9854b | 590 | b43_fill_txstatus_report(dev, info, status); |
5100d5ac MB |
591 | |
592 | total_len = pack->skb->len + b43_txhdr_size(dev); | |
593 | total_len = roundup(total_len, 4); | |
594 | q->buffer_used -= total_len; | |
595 | q->free_packet_slots += 1; | |
596 | ||
ce6c4a13 | 597 | ieee80211_tx_status(dev->wl->hw, pack->skb); |
5100d5ac MB |
598 | pack->skb = NULL; |
599 | list_add(&pack->list, &q->packets_list); | |
600 | ||
601 | if (q->stopped) { | |
602 | ieee80211_wake_queue(dev->wl->hw, q->queue_prio); | |
603 | q->stopped = 0; | |
604 | } | |
5100d5ac MB |
605 | } |
606 | ||
607 | void b43_pio_get_tx_stats(struct b43_wldev *dev, | |
608 | struct ieee80211_tx_queue_stats *stats) | |
609 | { | |
610 | const int nr_queues = dev->wl->hw->queues; | |
611 | struct b43_pio_txqueue *q; | |
5100d5ac MB |
612 | int i; |
613 | ||
614 | for (i = 0; i < nr_queues; i++) { | |
5100d5ac MB |
615 | q = select_queue_by_priority(dev, i); |
616 | ||
57ffc589 JB |
617 | stats[i].len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots; |
618 | stats[i].limit = B43_PIO_MAX_NR_TXPACKETS; | |
619 | stats[i].count = q->nr_tx_packets; | |
5100d5ac MB |
620 | } |
621 | } | |
622 | ||
623 | /* Returns whether we should fetch another frame. */ | |
624 | static bool pio_rx_frame(struct b43_pio_rxqueue *q) | |
625 | { | |
d8c17e15 | 626 | struct b43_wldev *dev = q->dev; |
7e937c63 | 627 | struct b43_wl *wl = dev->wl; |
5100d5ac MB |
628 | u16 len; |
629 | u32 macstat; | |
630 | unsigned int i, padding; | |
631 | struct sk_buff *skb; | |
632 | const char *err_msg = NULL; | |
88499ab3 MB |
633 | struct b43_rxhdr_fw4 *rxhdr = |
634 | (struct b43_rxhdr_fw4 *)wl->pio_scratchspace; | |
5100d5ac | 635 | |
88499ab3 MB |
636 | BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr)); |
637 | memset(rxhdr, 0, sizeof(*rxhdr)); | |
5100d5ac MB |
638 | |
639 | /* Check if we have data and wait for it to get ready. */ | |
640 | if (q->rev >= 8) { | |
641 | u32 ctl; | |
642 | ||
643 | ctl = b43_piorx_read32(q, B43_PIO8_RXCTL); | |
644 | if (!(ctl & B43_PIO8_RXCTL_FRAMERDY)) | |
645 | return 0; | |
646 | b43_piorx_write32(q, B43_PIO8_RXCTL, | |
647 | B43_PIO8_RXCTL_FRAMERDY); | |
648 | for (i = 0; i < 10; i++) { | |
649 | ctl = b43_piorx_read32(q, B43_PIO8_RXCTL); | |
650 | if (ctl & B43_PIO8_RXCTL_DATARDY) | |
651 | goto data_ready; | |
652 | udelay(10); | |
653 | } | |
654 | } else { | |
655 | u16 ctl; | |
656 | ||
657 | ctl = b43_piorx_read16(q, B43_PIO_RXCTL); | |
658 | if (!(ctl & B43_PIO_RXCTL_FRAMERDY)) | |
659 | return 0; | |
660 | b43_piorx_write16(q, B43_PIO_RXCTL, | |
661 | B43_PIO_RXCTL_FRAMERDY); | |
662 | for (i = 0; i < 10; i++) { | |
663 | ctl = b43_piorx_read16(q, B43_PIO_RXCTL); | |
664 | if (ctl & B43_PIO_RXCTL_DATARDY) | |
665 | goto data_ready; | |
666 | udelay(10); | |
667 | } | |
668 | } | |
669 | b43dbg(q->dev->wl, "PIO RX timed out\n"); | |
670 | return 1; | |
671 | data_ready: | |
672 | ||
673 | /* Get the preamble (RX header) */ | |
674 | if (q->rev >= 8) { | |
88499ab3 | 675 | ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr), |
d8c17e15 MB |
676 | q->mmio_base + B43_PIO8_RXDATA, |
677 | sizeof(u32)); | |
5100d5ac | 678 | } else { |
88499ab3 | 679 | ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr), |
d8c17e15 MB |
680 | q->mmio_base + B43_PIO_RXDATA, |
681 | sizeof(u16)); | |
5100d5ac MB |
682 | } |
683 | /* Sanity checks. */ | |
88499ab3 | 684 | len = le16_to_cpu(rxhdr->frame_len); |
5100d5ac MB |
685 | if (unlikely(len > 0x700)) { |
686 | err_msg = "len > 0x700"; | |
687 | goto rx_error; | |
688 | } | |
689 | if (unlikely(len == 0)) { | |
690 | err_msg = "len == 0"; | |
691 | goto rx_error; | |
692 | } | |
693 | ||
88499ab3 | 694 | macstat = le32_to_cpu(rxhdr->mac_status); |
5100d5ac MB |
695 | if (macstat & B43_RX_MAC_FCSERR) { |
696 | if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) { | |
697 | /* Drop frames with failed FCS. */ | |
698 | err_msg = "Frame FCS error"; | |
699 | goto rx_error; | |
700 | } | |
701 | } | |
702 | ||
703 | /* We always pad 2 bytes, as that's what upstream code expects | |
704 | * due to the RX-header being 30 bytes. In case the frame is | |
705 | * unaligned, we pad another 2 bytes. */ | |
706 | padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0; | |
707 | skb = dev_alloc_skb(len + padding + 2); | |
708 | if (unlikely(!skb)) { | |
709 | err_msg = "Out of memory"; | |
710 | goto rx_error; | |
711 | } | |
712 | skb_reserve(skb, 2); | |
713 | skb_put(skb, len + padding); | |
714 | if (q->rev >= 8) { | |
d8c17e15 MB |
715 | ssb_block_read(dev->dev, skb->data + padding, (len & ~3), |
716 | q->mmio_base + B43_PIO8_RXDATA, | |
717 | sizeof(u32)); | |
718 | if (len & 3) { | |
88499ab3 MB |
719 | u8 *tail = wl->pio_tailspace; |
720 | BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4); | |
721 | ||
d8c17e15 | 722 | /* Read the last few bytes. */ |
88499ab3 | 723 | ssb_block_read(dev->dev, tail, 4, |
b96ab540 MB |
724 | q->mmio_base + B43_PIO8_RXDATA, |
725 | sizeof(u32)); | |
d8c17e15 MB |
726 | switch (len & 3) { |
727 | case 3: | |
88499ab3 MB |
728 | skb->data[len + padding - 3] = tail[0]; |
729 | skb->data[len + padding - 2] = tail[1]; | |
730 | skb->data[len + padding - 1] = tail[2]; | |
b96ab540 | 731 | break; |
d8c17e15 | 732 | case 2: |
88499ab3 MB |
733 | skb->data[len + padding - 2] = tail[0]; |
734 | skb->data[len + padding - 1] = tail[1]; | |
b96ab540 | 735 | break; |
d8c17e15 | 736 | case 1: |
88499ab3 | 737 | skb->data[len + padding - 1] = tail[0]; |
b96ab540 | 738 | break; |
d8c17e15 | 739 | } |
5100d5ac MB |
740 | } |
741 | } else { | |
d8c17e15 MB |
742 | ssb_block_read(dev->dev, skb->data + padding, (len & ~1), |
743 | q->mmio_base + B43_PIO_RXDATA, | |
744 | sizeof(u16)); | |
745 | if (len & 1) { | |
88499ab3 MB |
746 | u8 *tail = wl->pio_tailspace; |
747 | BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2); | |
748 | ||
d8c17e15 | 749 | /* Read the last byte. */ |
88499ab3 | 750 | ssb_block_read(dev->dev, tail, 2, |
b96ab540 MB |
751 | q->mmio_base + B43_PIO_RXDATA, |
752 | sizeof(u16)); | |
88499ab3 | 753 | skb->data[len + padding - 1] = tail[0]; |
5100d5ac MB |
754 | } |
755 | } | |
756 | ||
88499ab3 | 757 | b43_rx(q->dev, skb, rxhdr); |
5100d5ac MB |
758 | |
759 | return 1; | |
760 | ||
761 | rx_error: | |
762 | if (err_msg) | |
763 | b43dbg(q->dev->wl, "PIO RX error: %s\n", err_msg); | |
764 | b43_piorx_write16(q, B43_PIO_RXCTL, B43_PIO_RXCTL_DATARDY); | |
765 | return 1; | |
766 | } | |
767 | ||
77ca07ff | 768 | void b43_pio_rx(struct b43_pio_rxqueue *q) |
5100d5ac | 769 | { |
77ca07ff | 770 | unsigned int count = 0; |
5100d5ac MB |
771 | bool stop; |
772 | ||
77ca07ff | 773 | while (1) { |
5100d5ac | 774 | stop = (pio_rx_frame(q) == 0); |
5100d5ac MB |
775 | if (stop) |
776 | break; | |
77ca07ff MB |
777 | cond_resched(); |
778 | if (WARN_ON_ONCE(++count > 10000)) | |
779 | break; | |
780 | } | |
5100d5ac MB |
781 | } |
782 | ||
783 | static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q) | |
784 | { | |
5100d5ac MB |
785 | if (q->rev >= 8) { |
786 | b43_piotx_write32(q, B43_PIO8_TXCTL, | |
787 | b43_piotx_read32(q, B43_PIO8_TXCTL) | |
788 | | B43_PIO8_TXCTL_SUSPREQ); | |
789 | } else { | |
790 | b43_piotx_write16(q, B43_PIO_TXCTL, | |
791 | b43_piotx_read16(q, B43_PIO_TXCTL) | |
792 | | B43_PIO_TXCTL_SUSPREQ); | |
793 | } | |
5100d5ac MB |
794 | } |
795 | ||
796 | static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q) | |
797 | { | |
5100d5ac MB |
798 | if (q->rev >= 8) { |
799 | b43_piotx_write32(q, B43_PIO8_TXCTL, | |
800 | b43_piotx_read32(q, B43_PIO8_TXCTL) | |
801 | & ~B43_PIO8_TXCTL_SUSPREQ); | |
802 | } else { | |
803 | b43_piotx_write16(q, B43_PIO_TXCTL, | |
804 | b43_piotx_read16(q, B43_PIO_TXCTL) | |
805 | & ~B43_PIO_TXCTL_SUSPREQ); | |
806 | } | |
5100d5ac MB |
807 | } |
808 | ||
809 | void b43_pio_tx_suspend(struct b43_wldev *dev) | |
810 | { | |
811 | b43_power_saving_ctl_bits(dev, B43_PS_AWAKE); | |
812 | b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BK); | |
813 | b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BE); | |
814 | b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VI); | |
815 | b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VO); | |
816 | b43_pio_tx_suspend_queue(dev->pio.tx_queue_mcast); | |
817 | } | |
818 | ||
819 | void b43_pio_tx_resume(struct b43_wldev *dev) | |
820 | { | |
821 | b43_pio_tx_resume_queue(dev->pio.tx_queue_mcast); | |
822 | b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VO); | |
823 | b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VI); | |
824 | b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BE); | |
825 | b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BK); | |
826 | b43_power_saving_ctl_bits(dev, 0); | |
827 | } |