brcm80211: fmac: change function rx_frame parameter
[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / dhd_cdc.c
CommitLineData
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1/*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17/*******************************************************************************
18 * Communicates with the dongle by using dcmd codes.
19 * For certain dcmd codes, the dongle interprets string data from the host.
20 ******************************************************************************/
21
22#include <linux/types.h>
23#include <linux/netdevice.h>
24#include <linux/sched.h>
25#include <defs.h>
26
27#include <brcmu_utils.h>
28#include <brcmu_wifi.h>
29
30#include "dhd.h"
31#include "dhd_proto.h"
32#include "dhd_bus.h"
33#include "dhd_dbg.h"
34
35struct brcmf_proto_cdc_dcmd {
36 __le32 cmd; /* dongle command value */
37 __le32 len; /* lower 16: output buflen;
38 * upper 16: input buflen (excludes header) */
39 __le32 flags; /* flag defns given below */
40 __le32 status; /* status code returned from the device */
41};
42
43/* Max valid buffer size that can be sent to the dongle */
44#define CDC_MAX_MSG_SIZE (ETH_FRAME_LEN+ETH_FCS_LEN)
45
46/* CDC flag definitions */
47#define CDC_DCMD_ERROR 0x01 /* 1=cmd failed */
48#define CDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */
49#define CDC_DCMD_IF_MASK 0xF000 /* I/F index */
50#define CDC_DCMD_IF_SHIFT 12
51#define CDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */
52#define CDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */
53#define CDC_DCMD_ID(flags) \
54 (((flags) & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT)
55
56/*
57 * BDC header - Broadcom specific extension of CDC.
58 * Used on data packets to convey priority across USB.
59 */
60#define BDC_HEADER_LEN 4
e40aed06 61#define BDC_PROTO_VER 2 /* Protocol version */
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62#define BDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */
63#define BDC_FLAG_VER_SHIFT 4 /* Protocol version shift */
64#define BDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */
65#define BDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */
66#define BDC_PRIORITY_MASK 0x7
67#define BDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */
68#define BDC_FLAG2_IF_SHIFT 0
69
70#define BDC_GET_IF_IDX(hdr) \
71 ((int)((((hdr)->flags2) & BDC_FLAG2_IF_MASK) >> BDC_FLAG2_IF_SHIFT))
72#define BDC_SET_IF_IDX(hdr, idx) \
73 ((hdr)->flags2 = (((hdr)->flags2 & ~BDC_FLAG2_IF_MASK) | \
74 ((idx) << BDC_FLAG2_IF_SHIFT)))
75
76struct brcmf_proto_bdc_header {
77 u8 flags;
78 u8 priority; /* 802.1d Priority, 4:7 flow control info for usb */
79 u8 flags2;
e40aed06 80 u8 data_offset;
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81};
82
83
84#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
85#define BUS_HEADER_LEN (16+BRCMF_SDALIGN) /* Must be atleast SDPCM_RESERVE
86 * (amount of header tha might be added)
87 * plus any space that might be needed
88 * for alignment padding.
89 */
90#define ROUND_UP_MARGIN 2048 /* Biggest SDIO block size possible for
91 * round off at the end of buffer
92 */
93
94struct brcmf_proto {
95 u16 reqid;
96 u8 pending;
97 u32 lastcmd;
98 u8 bus_header[BUS_HEADER_LEN];
99 struct brcmf_proto_cdc_dcmd msg;
100 unsigned char buf[BRCMF_DCMD_MAXLEN + ROUND_UP_MARGIN];
101};
102
103static int brcmf_proto_cdc_msg(struct brcmf_pub *drvr)
104{
105 struct brcmf_proto *prot = drvr->prot;
106 int len = le32_to_cpu(prot->msg.len) +
107 sizeof(struct brcmf_proto_cdc_dcmd);
108
109 brcmf_dbg(TRACE, "Enter\n");
110
111 /* NOTE : cdc->msg.len holds the desired length of the buffer to be
112 * returned. Only up to CDC_MAX_MSG_SIZE of this buffer area
113 * is actually sent to the dongle
114 */
115 if (len > CDC_MAX_MSG_SIZE)
116 len = CDC_MAX_MSG_SIZE;
117
118 /* Send request */
47a1ce78 119 return brcmf_sdbrcm_bus_txctl(drvr->dev, (unsigned char *)&prot->msg,
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120 len);
121}
122
123static int brcmf_proto_cdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
124{
125 int ret;
126 struct brcmf_proto *prot = drvr->prot;
127
128 brcmf_dbg(TRACE, "Enter\n");
129
130 do {
532cdd3b 131 ret = brcmf_sdbrcm_bus_rxctl(drvr->dev,
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132 (unsigned char *)&prot->msg,
133 len + sizeof(struct brcmf_proto_cdc_dcmd));
134 if (ret < 0)
135 break;
136 } while (CDC_DCMD_ID(le32_to_cpu(prot->msg.flags)) != id);
137
138 return ret;
139}
140
141int
142brcmf_proto_cdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
143 void *buf, uint len)
144{
145 struct brcmf_proto *prot = drvr->prot;
146 struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
147 void *info;
148 int ret = 0, retries = 0;
149 u32 id, flags;
150
151 brcmf_dbg(TRACE, "Enter\n");
152 brcmf_dbg(CTL, "cmd %d len %d\n", cmd, len);
153
154 /* Respond "bcmerror" and "bcmerrorstr" with local cache */
155 if (cmd == BRCMF_C_GET_VAR && buf) {
156 if (!strcmp((char *)buf, "bcmerrorstr")) {
157 strncpy((char *)buf, "bcm_error",
158 BCME_STRLEN);
159 goto done;
160 } else if (!strcmp((char *)buf, "bcmerror")) {
161 *(int *)buf = drvr->dongle_error;
162 goto done;
163 }
164 }
165
166 memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
167
168 msg->cmd = cpu_to_le32(cmd);
169 msg->len = cpu_to_le32(len);
170 flags = (++prot->reqid << CDC_DCMD_ID_SHIFT);
171 flags = (flags & ~CDC_DCMD_IF_MASK) |
172 (ifidx << CDC_DCMD_IF_SHIFT);
173 msg->flags = cpu_to_le32(flags);
174
175 if (buf)
176 memcpy(prot->buf, buf, len);
177
178 ret = brcmf_proto_cdc_msg(drvr);
179 if (ret < 0) {
180 brcmf_dbg(ERROR, "brcmf_proto_cdc_msg failed w/status %d\n",
181 ret);
182 goto done;
183 }
184
185retry:
186 /* wait for interrupt and get first fragment */
187 ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
188 if (ret < 0)
189 goto done;
190
191 flags = le32_to_cpu(msg->flags);
192 id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
193
194 if ((id < prot->reqid) && (++retries < RETRIES))
195 goto retry;
196 if (id != prot->reqid) {
197 brcmf_dbg(ERROR, "%s: unexpected request id %d (expected %d)\n",
198 brcmf_ifname(drvr, ifidx), id, prot->reqid);
199 ret = -EINVAL;
200 goto done;
201 }
202
203 /* Check info buffer */
204 info = (void *)&msg[1];
205
206 /* Copy info buffer */
207 if (buf) {
208 if (ret < (int)len)
209 len = ret;
210 memcpy(buf, info, len);
211 }
212
213 /* Check the ERROR flag */
214 if (flags & CDC_DCMD_ERROR) {
215 ret = le32_to_cpu(msg->status);
216 /* Cache error from dongle */
217 drvr->dongle_error = ret;
218 }
219
220done:
221 return ret;
222}
223
224int brcmf_proto_cdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
225 void *buf, uint len)
226{
227 struct brcmf_proto *prot = drvr->prot;
228 struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
229 int ret = 0;
230 u32 flags, id;
231
232 brcmf_dbg(TRACE, "Enter\n");
233 brcmf_dbg(CTL, "cmd %d len %d\n", cmd, len);
234
235 memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
236
237 msg->cmd = cpu_to_le32(cmd);
238 msg->len = cpu_to_le32(len);
239 flags = (++prot->reqid << CDC_DCMD_ID_SHIFT) | CDC_DCMD_SET;
240 flags = (flags & ~CDC_DCMD_IF_MASK) |
241 (ifidx << CDC_DCMD_IF_SHIFT);
242 msg->flags = cpu_to_le32(flags);
243
244 if (buf)
245 memcpy(prot->buf, buf, len);
246
247 ret = brcmf_proto_cdc_msg(drvr);
248 if (ret < 0)
249 goto done;
250
251 ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
252 if (ret < 0)
253 goto done;
254
255 flags = le32_to_cpu(msg->flags);
256 id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
257
258 if (id != prot->reqid) {
259 brcmf_dbg(ERROR, "%s: unexpected request id %d (expected %d)\n",
260 brcmf_ifname(drvr, ifidx), id, prot->reqid);
261 ret = -EINVAL;
262 goto done;
263 }
264
265 /* Check the ERROR flag */
266 if (flags & CDC_DCMD_ERROR) {
267 ret = le32_to_cpu(msg->status);
268 /* Cache error from dongle */
269 drvr->dongle_error = ret;
270 }
271
272done:
273 return ret;
274}
275
276int
277brcmf_proto_dcmd(struct brcmf_pub *drvr, int ifidx, struct brcmf_dcmd *dcmd,
278 int len)
279{
280 struct brcmf_proto *prot = drvr->prot;
281 int ret = -1;
282
8d169aa0 283 if (drvr->bus_if->state == BRCMF_BUS_DOWN) {
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284 brcmf_dbg(ERROR, "bus is down. we have nothing to do.\n");
285 return ret;
286 }
1ae00421 287 mutex_lock(&drvr->proto_block);
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288
289 brcmf_dbg(TRACE, "Enter\n");
290
291 if (len > BRCMF_DCMD_MAXLEN)
292 goto done;
293
294 if (prot->pending == true) {
295 brcmf_dbg(TRACE, "CDC packet is pending!!!! cmd=0x%x (%lu) lastcmd=0x%x (%lu)\n",
296 dcmd->cmd, (unsigned long)dcmd->cmd, prot->lastcmd,
297 (unsigned long)prot->lastcmd);
298 if (dcmd->cmd == BRCMF_C_SET_VAR ||
299 dcmd->cmd == BRCMF_C_GET_VAR)
300 brcmf_dbg(TRACE, "iovar cmd=%s\n", (char *)dcmd->buf);
301
302 goto done;
303 }
304
305 prot->pending = true;
306 prot->lastcmd = dcmd->cmd;
307 if (dcmd->set)
308 ret = brcmf_proto_cdc_set_dcmd(drvr, ifidx, dcmd->cmd,
309 dcmd->buf, len);
310 else {
311 ret = brcmf_proto_cdc_query_dcmd(drvr, ifidx, dcmd->cmd,
312 dcmd->buf, len);
313 if (ret > 0)
314 dcmd->used = ret -
315 sizeof(struct brcmf_proto_cdc_dcmd);
316 }
317
318 if (ret >= 0)
319 ret = 0;
320 else {
321 struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
322 /* len == needed when set/query fails from dongle */
323 dcmd->needed = le32_to_cpu(msg->len);
324 }
325
326 /* Intercept the wme_dp dongle cmd here */
327 if (!ret && dcmd->cmd == BRCMF_C_SET_VAR &&
328 !strcmp(dcmd->buf, "wme_dp")) {
329 int slen;
330 __le32 val = 0;
331
332 slen = strlen("wme_dp") + 1;
333 if (len >= (int)(slen + sizeof(int)))
334 memcpy(&val, (char *)dcmd->buf + slen, sizeof(int));
335 drvr->wme_dp = (u8) le32_to_cpu(val);
336 }
337
338 prot->pending = false;
339
340done:
1ae00421 341 mutex_unlock(&drvr->proto_block);
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342
343 return ret;
344}
345
346static bool pkt_sum_needed(struct sk_buff *skb)
347{
348 return skb->ip_summed == CHECKSUM_PARTIAL;
349}
350
351static void pkt_set_sum_good(struct sk_buff *skb, bool x)
352{
353 skb->ip_summed = (x ? CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
354}
355
356void brcmf_proto_hdrpush(struct brcmf_pub *drvr, int ifidx,
357 struct sk_buff *pktbuf)
358{
359 struct brcmf_proto_bdc_header *h;
360
361 brcmf_dbg(TRACE, "Enter\n");
362
363 /* Push BDC header used to convey priority for buses that don't */
364
365 skb_push(pktbuf, BDC_HEADER_LEN);
366
367 h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
368
369 h->flags = (BDC_PROTO_VER << BDC_FLAG_VER_SHIFT);
370 if (pkt_sum_needed(pktbuf))
371 h->flags |= BDC_FLAG_SUM_NEEDED;
372
373 h->priority = (pktbuf->priority & BDC_PRIORITY_MASK);
374 h->flags2 = 0;
e40aed06 375 h->data_offset = 0;
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376 BDC_SET_IF_IDX(h, ifidx);
377}
378
379int brcmf_proto_hdrpull(struct brcmf_pub *drvr, int *ifidx,
380 struct sk_buff *pktbuf)
381{
382 struct brcmf_proto_bdc_header *h;
383
384 brcmf_dbg(TRACE, "Enter\n");
385
386 /* Pop BDC header used to convey priority for buses that don't */
387
388 if (pktbuf->len < BDC_HEADER_LEN) {
389 brcmf_dbg(ERROR, "rx data too short (%d < %d)\n",
390 pktbuf->len, BDC_HEADER_LEN);
391 return -EBADE;
392 }
393
394 h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
395
396 *ifidx = BDC_GET_IF_IDX(h);
397 if (*ifidx >= BRCMF_MAX_IFS) {
398 brcmf_dbg(ERROR, "rx data ifnum out of range (%d)\n", *ifidx);
399 return -EBADE;
400 }
401
402 if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) !=
403 BDC_PROTO_VER) {
404 brcmf_dbg(ERROR, "%s: non-BDC packet received, flags 0x%x\n",
405 brcmf_ifname(drvr, *ifidx), h->flags);
406 return -EBADE;
407 }
408
409 if (h->flags & BDC_FLAG_SUM_GOOD) {
410 brcmf_dbg(INFO, "%s: BDC packet received with good rx-csum, flags 0x%x\n",
411 brcmf_ifname(drvr, *ifidx), h->flags);
412 pkt_set_sum_good(pktbuf, true);
413 }
414
415 pktbuf->priority = h->priority & BDC_PRIORITY_MASK;
416
417 skb_pull(pktbuf, BDC_HEADER_LEN);
418
419 return 0;
420}
421
422int brcmf_proto_attach(struct brcmf_pub *drvr)
423{
424 struct brcmf_proto *cdc;
425
426 cdc = kzalloc(sizeof(struct brcmf_proto), GFP_ATOMIC);
427 if (!cdc)
428 goto fail;
429
430 /* ensure that the msg buf directly follows the cdc msg struct */
431 if ((unsigned long)(&cdc->msg + 1) != (unsigned long)cdc->buf) {
432 brcmf_dbg(ERROR, "struct brcmf_proto is not correctly defined\n");
433 goto fail;
434 }
435
436 drvr->prot = cdc;
437 drvr->hdrlen += BDC_HEADER_LEN;
438 drvr->maxctl = BRCMF_DCMD_MAXLEN +
439 sizeof(struct brcmf_proto_cdc_dcmd) + ROUND_UP_MARGIN;
440 return 0;
441
442fail:
443 kfree(cdc);
444 return -ENOMEM;
445}
446
447/* ~NOTE~ What if another thread is waiting on the semaphore? Holding it? */
448void brcmf_proto_detach(struct brcmf_pub *drvr)
449{
450 kfree(drvr->prot);
451 drvr->prot = NULL;
452}
453
454void brcmf_proto_dstats(struct brcmf_pub *drvr)
455{
456 /* No stats from dongle added yet, copy bus stats */
457 drvr->dstats.tx_packets = drvr->tx_packets;
458 drvr->dstats.tx_errors = drvr->tx_errors;
459 drvr->dstats.rx_packets = drvr->rx_packets;
460 drvr->dstats.rx_errors = drvr->rx_errors;
461 drvr->dstats.rx_dropped = drvr->rx_dropped;
462 drvr->dstats.multicast = drvr->rx_multicast;
463 return;
464}
465
466int brcmf_proto_init(struct brcmf_pub *drvr)
467{
468 int ret = 0;
469 char buf[128];
470
471 brcmf_dbg(TRACE, "Enter\n");
472
1ae00421 473 mutex_lock(&drvr->proto_block);
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474
475 /* Get the device MAC address */
476 strcpy(buf, "cur_etheraddr");
477 ret = brcmf_proto_cdc_query_dcmd(drvr, 0, BRCMF_C_GET_VAR,
478 buf, sizeof(buf));
479 if (ret < 0) {
1ae00421 480 mutex_unlock(&drvr->proto_block);
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481 return ret;
482 }
483 memcpy(drvr->mac, buf, ETH_ALEN);
484
1ae00421 485 mutex_unlock(&drvr->proto_block);
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486
487 ret = brcmf_c_preinit_dcmds(drvr);
488
489 /* Always assumes wl for now */
490 drvr->iswl = true;
491
492 return ret;
493}
494
495void brcmf_proto_stop(struct brcmf_pub *drvr)
496{
497 /* Nothing to do for CDC */
498}
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