summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c
blob: 9431af2465f3135fc76d5df370853a3b85a77d67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include "dhd.h"
#include "dhd_bus.h"
#include "dhd_proto.h"
#include "dhd_dbg.h"
#include "fwil.h"
#include "tracepoint.h"

#define PKTFILTER_BUF_SIZE		128
#define BRCMF_DEFAULT_BCN_TIMEOUT	3
#define BRCMF_DEFAULT_SCAN_CHANNEL_TIME	40
#define BRCMF_DEFAULT_SCAN_UNASSOC_TIME	40
#define BRCMF_DEFAULT_PACKET_FILTER	"100 0 0 0 0x01 0x00"

#ifdef DEBUG
static const char brcmf_version[] =
	"Dongle Host Driver, version " BRCMF_VERSION_STR "\nCompiled on "
	__DATE__ " at " __TIME__;
#else
static const char brcmf_version[] =
	"Dongle Host Driver, version " BRCMF_VERSION_STR;
#endif


bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
		      struct sk_buff *pkt, int prec)
{
	struct sk_buff *p;
	int eprec = -1;		/* precedence to evict from */
	bool discard_oldest;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;

	/* Fast case, precedence queue is not full and we are also not
	 * exceeding total queue length
	 */
	if (!pktq_pfull(q, prec) && !pktq_full(q)) {
		brcmu_pktq_penq(q, prec, pkt);
		return true;
	}

	/* Determine precedence from which to evict packet, if any */
	if (pktq_pfull(q, prec))
		eprec = prec;
	else if (pktq_full(q)) {
		p = brcmu_pktq_peek_tail(q, &eprec);
		if (eprec > prec)
			return false;
	}

	/* Evict if needed */
	if (eprec >= 0) {
		/* Detect queueing to unconfigured precedence */
		discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
		if (eprec == prec && !discard_oldest)
			return false;	/* refuse newer (incoming) packet */
		/* Evict packet according to discard policy */
		p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
			brcmu_pktq_pdeq_tail(q, eprec);
		if (p == NULL)
			brcmf_err("brcmu_pktq_penq() failed, oldest %d\n",
				  discard_oldest);

		brcmu_pkt_buf_free_skb(p);
	}

	/* Enqueue */
	p = brcmu_pktq_penq(q, prec, pkt);
	if (p == NULL)
		brcmf_err("brcmu_pktq_penq() failed\n");

	return p != NULL;
}

/* Convert user's input in hex pattern to byte-size mask */
static int brcmf_c_pattern_atoh(char *src, char *dst)
{
	int i;
	if (strncmp(src, "0x", 2) != 0 && strncmp(src, "0X", 2) != 0) {
		brcmf_err("Mask invalid format. Needs to start with 0x\n");
		return -EINVAL;
	}
	src = src + 2;		/* Skip past 0x */
	if (strlen(src) % 2 != 0) {
		brcmf_err("Mask invalid format. Length must be even.\n");
		return -EINVAL;
	}
	for (i = 0; *src != '\0'; i++) {
		unsigned long res;
		char num[3];
		strncpy(num, src, 2);
		num[2] = '\0';
		if (kstrtoul(num, 16, &res))
			return -EINVAL;
		dst[i] = (u8)res;
		src += 2;
	}
	return i;
}

static void
brcmf_c_pktfilter_offload_enable(struct brcmf_if *ifp, char *arg, int enable,
				 int master_mode)
{
	unsigned long res;
	char *argv;
	char *arg_save = NULL, *arg_org = NULL;
	s32 err;
	struct brcmf_pkt_filter_enable_le enable_parm;

	arg_save = kstrdup(arg, GFP_ATOMIC);
	if (!arg_save)
		goto fail;

	arg_org = arg_save;

	argv = strsep(&arg_save, " ");

	if (argv == NULL) {
		brcmf_err("No args provided\n");
		goto fail;
	}

	/* Parse packet filter id. */
	enable_parm.id = 0;
	if (!kstrtoul(argv, 0, &res))
		enable_parm.id = cpu_to_le32((u32)res);

	/* Enable/disable the specified filter. */
	enable_parm.enable = cpu_to_le32(enable);

	err = brcmf_fil_iovar_data_set(ifp, "pkt_filter_enable", &enable_parm,
				       sizeof(enable_parm));
	if (err)
		brcmf_err("Set pkt_filter_enable error (%d)\n", err);

	/* Control the master mode */
	err = brcmf_fil_iovar_int_set(ifp, "pkt_filter_mode", master_mode);
	if (err)
		brcmf_err("Set pkt_filter_mode error (%d)\n", err);

fail:
	kfree(arg_org);
}

static void brcmf_c_pktfilter_offload_set(struct brcmf_if *ifp, char *arg)
{
	struct brcmf_pkt_filter_le *pkt_filter;
	unsigned long res;
	int buf_len;
	s32 err;
	u32 mask_size;
	u32 pattern_size;
	char *argv[8], *buf = NULL;
	int i = 0;
	char *arg_save = NULL, *arg_org = NULL;

	arg_save = kstrdup(arg, GFP_ATOMIC);
	if (!arg_save)
		goto fail;

	arg_org = arg_save;

	buf = kmalloc(PKTFILTER_BUF_SIZE, GFP_ATOMIC);
	if (!buf)
		goto fail;

	argv[i] = strsep(&arg_save, " ");
	while (argv[i]) {
		i++;
		if (i >= 8) {
			brcmf_err("Too many parameters\n");
			goto fail;
		}
		argv[i] = strsep(&arg_save, " ");
	}

	if (i != 6) {
		brcmf_err("Not enough args provided %d\n", i);
		goto fail;
	}

	pkt_filter = (struct brcmf_pkt_filter_le *)buf;

	/* Parse packet filter id. */
	pkt_filter->id = 0;
	if (!kstrtoul(argv[0], 0, &res))
		pkt_filter->id = cpu_to_le32((u32)res);

	/* Parse filter polarity. */
	pkt_filter->negate_match = 0;
	if (!kstrtoul(argv[1], 0, &res))
		pkt_filter->negate_match = cpu_to_le32((u32)res);

	/* Parse filter type. */
	pkt_filter->type = 0;
	if (!kstrtoul(argv[2], 0, &res))
		pkt_filter->type = cpu_to_le32((u32)res);

	/* Parse pattern filter offset. */
	pkt_filter->u.pattern.offset = 0;
	if (!kstrtoul(argv[3], 0, &res))
		pkt_filter->u.pattern.offset = cpu_to_le32((u32)res);

	/* Parse pattern filter mask. */
	mask_size = brcmf_c_pattern_atoh(argv[4],
			(char *)pkt_filter->u.pattern.mask_and_pattern);

	/* Parse pattern filter pattern. */
	pattern_size = brcmf_c_pattern_atoh(argv[5],
		(char *)&pkt_filter->u.pattern.mask_and_pattern[mask_size]);

	if (mask_size != pattern_size) {
		brcmf_err("Mask and pattern not the same size\n");
		goto fail;
	}

	pkt_filter->u.pattern.size_bytes = cpu_to_le32(mask_size);
	buf_len = offsetof(struct brcmf_pkt_filter_le,
			   u.pattern.mask_and_pattern);
	buf_len += mask_size + pattern_size;

	err = brcmf_fil_iovar_data_set(ifp, "pkt_filter_add", pkt_filter,
				       buf_len);
	if (err)
		brcmf_err("Set pkt_filter_add error (%d)\n", err);

fail:
	kfree(arg_org);

	kfree(buf);
}

int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
{
	s8 eventmask[BRCMF_EVENTING_MASK_LEN];
	u8 buf[BRCMF_DCMD_SMLEN];
	char *ptr;
	s32 err;
	struct brcmf_bus_dcmd *cmdlst;
	struct list_head *cur, *q;

	/* retreive mac address */
	err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
				       sizeof(ifp->mac_addr));
	if (err < 0) {
		brcmf_err("Retreiving cur_etheraddr failed, %d\n",
			  err);
		goto done;
	}
	memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));

	/* query for 'ver' to get version info from firmware */
	memset(buf, 0, sizeof(buf));
	strcpy(buf, "ver");
	err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
	if (err < 0) {
		brcmf_err("Retreiving version information failed, %d\n",
			  err);
		goto done;
	}
	ptr = (char *)buf;
	strsep(&ptr, "\n");
	/* Print fw version info */
	brcmf_err("Firmware version = %s\n", buf);

	/*
	 * Setup timeout if Beacons are lost and roam is off to report
	 * link down
	 */
	err = brcmf_fil_iovar_int_set(ifp, "bcn_timeout",
				      BRCMF_DEFAULT_BCN_TIMEOUT);
	if (err) {
		brcmf_err("bcn_timeout error (%d)\n", err);
		goto done;
	}

	/* Enable/Disable build-in roaming to allowed ext supplicant to take
	 * of romaing
	 */
	err = brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
	if (err) {
		brcmf_err("roam_off error (%d)\n", err);
		goto done;
	}

	/* Setup event_msgs, enable E_IF */
	err = brcmf_fil_iovar_data_get(ifp, "event_msgs", eventmask,
				       BRCMF_EVENTING_MASK_LEN);
	if (err) {
		brcmf_err("Get event_msgs error (%d)\n", err);
		goto done;
	}
	setbit(eventmask, BRCMF_E_IF);
	err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask,
				       BRCMF_EVENTING_MASK_LEN);
	if (err) {
		brcmf_err("Set event_msgs error (%d)\n", err);
		goto done;
	}

	/* Setup default scan channel time */
	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_CHANNEL_TIME,
				    BRCMF_DEFAULT_SCAN_CHANNEL_TIME);
	if (err) {
		brcmf_err("BRCMF_C_SET_SCAN_CHANNEL_TIME error (%d)\n",
			  err);
		goto done;
	}

	/* Setup default scan unassoc time */
	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_UNASSOC_TIME,
				    BRCMF_DEFAULT_SCAN_UNASSOC_TIME);
	if (err) {
		brcmf_err("BRCMF_C_SET_SCAN_UNASSOC_TIME error (%d)\n",
			  err);
		goto done;
	}

	/* Setup packet filter */
	brcmf_c_pktfilter_offload_set(ifp, BRCMF_DEFAULT_PACKET_FILTER);
	brcmf_c_pktfilter_offload_enable(ifp, BRCMF_DEFAULT_PACKET_FILTER,
					 0, true);

	/* set bus specific command if there is any */
	list_for_each_safe(cur, q, &ifp->drvr->bus_if->dcmd_list) {
		cmdlst = list_entry(cur, struct brcmf_bus_dcmd, list);
		if (cmdlst->name && cmdlst->param && cmdlst->param_len) {
			brcmf_fil_iovar_data_set(ifp, cmdlst->name,
						 cmdlst->param,
						 cmdlst->param_len);
		}
		list_del(cur);
		kfree(cmdlst);
	}
done:
	return err;
}

#ifdef CONFIG_BRCM_TRACING
void __brcmf_err(const char *func, const char *fmt, ...)
{
	struct va_format vaf = {
		.fmt = fmt,
	};
	va_list args;

	va_start(args, fmt);
	vaf.va = &args;
	pr_err("%s: %pV", func, &vaf);
	trace_brcmf_err(func, &vaf);
	va_end(args);
}
#endif
#if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
{
	struct va_format vaf = {
		.fmt = fmt,
	};
	va_list args;

	va_start(args, fmt);
	vaf.va = &args;
	if (brcmf_msg_level & level)
		pr_debug("%s %pV", func, &vaf);
	trace_brcmf_dbg(level, func, &vaf);
	va_end(args);
}
#endif