1 /*
2  * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
3  * DebugFS code
4  *
5  * Copyright (c) 2010, ST-Ericsson
6  * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #include <linux/module.h>
14 #include <linux/debugfs.h>
15 #include <linux/seq_file.h>
16 #include "cw1200.h"
17 #include "debug.h"
18 #include "fwio.h"
19 
20 /* join_status */
21 static const char * const cw1200_debug_join_status[] = {
22 	"passive",
23 	"monitor",
24 	"station (joining)",
25 	"station (not authenticated yet)",
26 	"station",
27 	"adhoc",
28 	"access point",
29 };
30 
31 /* WSM_JOIN_PREAMBLE_... */
32 static const char * const cw1200_debug_preamble[] = {
33 	"long",
34 	"short",
35 	"long on 1 and 2 Mbps",
36 };
37 
38 
39 static const char * const cw1200_debug_link_id[] = {
40 	"OFF",
41 	"REQ",
42 	"SOFT",
43 	"HARD",
44 	"RESET",
45 	"RESET_REMAP",
46 };
47 
48 static const char *cw1200_debug_mode(int mode)
49 {
50 	switch (mode) {
51 	case NL80211_IFTYPE_UNSPECIFIED:
52 		return "unspecified";
53 	case NL80211_IFTYPE_MONITOR:
54 		return "monitor";
55 	case NL80211_IFTYPE_STATION:
56 		return "station";
57 	case NL80211_IFTYPE_ADHOC:
58 		return "adhoc";
59 	case NL80211_IFTYPE_MESH_POINT:
60 		return "mesh point";
61 	case NL80211_IFTYPE_AP:
62 		return "access point";
63 	case NL80211_IFTYPE_P2P_CLIENT:
64 		return "p2p client";
65 	case NL80211_IFTYPE_P2P_GO:
66 		return "p2p go";
67 	default:
68 		return "unsupported";
69 	}
70 }
71 
72 static void cw1200_queue_status_show(struct seq_file *seq,
73 				     struct cw1200_queue *q)
74 {
75 	int i;
76 	seq_printf(seq, "Queue       %d:\n", q->queue_id);
77 	seq_printf(seq, "  capacity: %zu\n", q->capacity);
78 	seq_printf(seq, "  queued:   %zu\n", q->num_queued);
79 	seq_printf(seq, "  pending:  %zu\n", q->num_pending);
80 	seq_printf(seq, "  sent:     %zu\n", q->num_sent);
81 	seq_printf(seq, "  locked:   %s\n", q->tx_locked_cnt ? "yes" : "no");
82 	seq_printf(seq, "  overfull: %s\n", q->overfull ? "yes" : "no");
83 	seq_puts(seq,   "  link map: 0-> ");
84 	for (i = 0; i < q->stats->map_capacity; ++i)
85 		seq_printf(seq, "%.2d ", q->link_map_cache[i]);
86 	seq_printf(seq, "<-%zu\n", q->stats->map_capacity);
87 }
88 
89 static void cw1200_debug_print_map(struct seq_file *seq,
90 				   struct cw1200_common *priv,
91 				   const char *label,
92 				   u32 map)
93 {
94 	int i;
95 	seq_printf(seq, "%s0-> ", label);
96 	for (i = 0; i < priv->tx_queue_stats.map_capacity; ++i)
97 		seq_printf(seq, "%s ", (map & BIT(i)) ? "**" : "..");
98 	seq_printf(seq, "<-%zu\n", priv->tx_queue_stats.map_capacity - 1);
99 }
100 
101 static int cw1200_status_show(struct seq_file *seq, void *v)
102 {
103 	int i;
104 	struct list_head *item;
105 	struct cw1200_common *priv = seq->private;
106 	struct cw1200_debug_priv *d = priv->debug;
107 
108 	seq_puts(seq,   "CW1200 Wireless LAN driver status\n");
109 	seq_printf(seq, "Hardware:   %d.%d\n",
110 		   priv->wsm_caps.hw_id,
111 		   priv->wsm_caps.hw_subid);
112 	seq_printf(seq, "Firmware:   %s %d.%d\n",
113 		   cw1200_fw_types[priv->wsm_caps.fw_type],
114 		   priv->wsm_caps.fw_ver,
115 		   priv->wsm_caps.fw_build);
116 	seq_printf(seq, "FW API:     %d\n",
117 		   priv->wsm_caps.fw_api);
118 	seq_printf(seq, "FW caps:    0x%.4X\n",
119 		   priv->wsm_caps.fw_cap);
120 	seq_printf(seq, "FW label:  '%s'\n",
121 		   priv->wsm_caps.fw_label);
122 	seq_printf(seq, "Mode:       %s%s\n",
123 		   cw1200_debug_mode(priv->mode),
124 		   priv->listening ? " (listening)" : "");
125 	seq_printf(seq, "Join state: %s\n",
126 		   cw1200_debug_join_status[priv->join_status]);
127 	if (priv->channel)
128 		seq_printf(seq, "Channel:    %d%s\n",
129 			   priv->channel->hw_value,
130 			   priv->channel_switch_in_progress ?
131 			   " (switching)" : "");
132 	if (priv->rx_filter.promiscuous)
133 		seq_puts(seq,   "Filter:     promisc\n");
134 	else if (priv->rx_filter.fcs)
135 		seq_puts(seq,   "Filter:     fcs\n");
136 	if (priv->rx_filter.bssid)
137 		seq_puts(seq,   "Filter:     bssid\n");
138 	if (!priv->disable_beacon_filter)
139 		seq_puts(seq,   "Filter:     beacons\n");
140 
141 	if (priv->enable_beacon ||
142 	    priv->mode == NL80211_IFTYPE_AP ||
143 	    priv->mode == NL80211_IFTYPE_ADHOC ||
144 	    priv->mode == NL80211_IFTYPE_MESH_POINT ||
145 	    priv->mode == NL80211_IFTYPE_P2P_GO)
146 		seq_printf(seq, "Beaconing:  %s\n",
147 			   priv->enable_beacon ?
148 			   "enabled" : "disabled");
149 
150 	for (i = 0; i < 4; ++i)
151 		seq_printf(seq, "EDCA(%d):    %d, %d, %d, %d, %d\n", i,
152 			   priv->edca.params[i].cwmin,
153 			   priv->edca.params[i].cwmax,
154 			   priv->edca.params[i].aifns,
155 			   priv->edca.params[i].txop_limit,
156 			   priv->edca.params[i].max_rx_lifetime);
157 
158 	if (priv->join_status == CW1200_JOIN_STATUS_STA) {
159 		static const char *pm_mode = "unknown";
160 		switch (priv->powersave_mode.mode) {
161 		case WSM_PSM_ACTIVE:
162 			pm_mode = "off";
163 			break;
164 		case WSM_PSM_PS:
165 			pm_mode = "on";
166 			break;
167 		case WSM_PSM_FAST_PS:
168 			pm_mode = "dynamic";
169 			break;
170 		}
171 		seq_printf(seq, "Preamble:   %s\n",
172 			   cw1200_debug_preamble[priv->association_mode.preamble]);
173 		seq_printf(seq, "AMPDU spcn: %d\n",
174 			   priv->association_mode.mpdu_start_spacing);
175 		seq_printf(seq, "Basic rate: 0x%.8X\n",
176 			   le32_to_cpu(priv->association_mode.basic_rate_set));
177 		seq_printf(seq, "Bss lost:   %d beacons\n",
178 			   priv->bss_params.beacon_lost_count);
179 		seq_printf(seq, "AID:        %d\n",
180 			   priv->bss_params.aid);
181 		seq_printf(seq, "Rates:      0x%.8X\n",
182 			   priv->bss_params.operational_rate_set);
183 		seq_printf(seq, "Powersave:  %s\n", pm_mode);
184 	}
185 	seq_printf(seq, "HT:         %s\n",
186 		   cw1200_is_ht(&priv->ht_info) ? "on" : "off");
187 	if (cw1200_is_ht(&priv->ht_info)) {
188 		seq_printf(seq, "Greenfield: %s\n",
189 			   cw1200_ht_greenfield(&priv->ht_info) ? "yes" : "no");
190 		seq_printf(seq, "AMPDU dens: %d\n",
191 			   cw1200_ht_ampdu_density(&priv->ht_info));
192 	}
193 	seq_printf(seq, "RSSI thold: %d\n",
194 		   priv->cqm_rssi_thold);
195 	seq_printf(seq, "RSSI hyst:  %d\n",
196 		   priv->cqm_rssi_hyst);
197 	seq_printf(seq, "Long retr:  %d\n",
198 		   priv->long_frame_max_tx_count);
199 	seq_printf(seq, "Short retr: %d\n",
200 		   priv->short_frame_max_tx_count);
201 	spin_lock_bh(&priv->tx_policy_cache.lock);
202 	i = 0;
203 	list_for_each(item, &priv->tx_policy_cache.used)
204 		++i;
205 	spin_unlock_bh(&priv->tx_policy_cache.lock);
206 	seq_printf(seq, "RC in use:  %d\n", i);
207 
208 	seq_puts(seq, "\n");
209 	for (i = 0; i < 4; ++i) {
210 		cw1200_queue_status_show(seq, &priv->tx_queue[i]);
211 		seq_puts(seq, "\n");
212 	}
213 
214 	cw1200_debug_print_map(seq, priv, "Link map:   ",
215 			       priv->link_id_map);
216 	cw1200_debug_print_map(seq, priv, "Asleep map: ",
217 			       priv->sta_asleep_mask);
218 	cw1200_debug_print_map(seq, priv, "PSPOLL map: ",
219 			       priv->pspoll_mask);
220 
221 	seq_puts(seq, "\n");
222 
223 	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
224 		if (priv->link_id_db[i].status) {
225 			seq_printf(seq, "Link %d:     %s, %pM\n",
226 				   i + 1,
227 				   cw1200_debug_link_id[priv->link_id_db[i].status],
228 				   priv->link_id_db[i].mac);
229 		}
230 	}
231 
232 	seq_puts(seq, "\n");
233 
234 	seq_printf(seq, "BH status:  %s\n",
235 		   atomic_read(&priv->bh_term) ? "terminated" : "alive");
236 	seq_printf(seq, "Pending RX: %d\n",
237 		   atomic_read(&priv->bh_rx));
238 	seq_printf(seq, "Pending TX: %d\n",
239 		   atomic_read(&priv->bh_tx));
240 	if (priv->bh_error)
241 		seq_printf(seq, "BH errcode: %d\n",
242 			   priv->bh_error);
243 	seq_printf(seq, "TX bufs:    %d x %d bytes\n",
244 		   priv->wsm_caps.input_buffers,
245 		   priv->wsm_caps.input_buffer_size);
246 	seq_printf(seq, "Used bufs:  %d\n",
247 		   priv->hw_bufs_used);
248 	seq_printf(seq, "Powermgmt:  %s\n",
249 		   priv->powersave_enabled ? "on" : "off");
250 	seq_printf(seq, "Device:     %s\n",
251 		   priv->device_can_sleep ? "asleep" : "awake");
252 
253 	spin_lock(&priv->wsm_cmd.lock);
254 	seq_printf(seq, "WSM status: %s\n",
255 		   priv->wsm_cmd.done ? "idle" : "active");
256 	seq_printf(seq, "WSM cmd:    0x%.4X (%td bytes)\n",
257 		   priv->wsm_cmd.cmd, priv->wsm_cmd.len);
258 	seq_printf(seq, "WSM retval: %d\n",
259 		   priv->wsm_cmd.ret);
260 	spin_unlock(&priv->wsm_cmd.lock);
261 
262 	seq_printf(seq, "Datapath:   %s\n",
263 		   atomic_read(&priv->tx_lock) ? "locked" : "unlocked");
264 	if (atomic_read(&priv->tx_lock))
265 		seq_printf(seq, "TXlock cnt: %d\n",
266 			   atomic_read(&priv->tx_lock));
267 
268 	seq_printf(seq, "TXed:       %d\n",
269 		   d->tx);
270 	seq_printf(seq, "AGG TXed:   %d\n",
271 		   d->tx_agg);
272 	seq_printf(seq, "MULTI TXed: %d (%d)\n",
273 		   d->tx_multi, d->tx_multi_frames);
274 	seq_printf(seq, "RXed:       %d\n",
275 		   d->rx);
276 	seq_printf(seq, "AGG RXed:   %d\n",
277 		   d->rx_agg);
278 	seq_printf(seq, "TX miss:    %d\n",
279 		   d->tx_cache_miss);
280 	seq_printf(seq, "TX align:   %d\n",
281 		   d->tx_align);
282 	seq_printf(seq, "TX burst:   %d\n",
283 		   d->tx_burst);
284 	seq_printf(seq, "TX TTL:     %d\n",
285 		   d->tx_ttl);
286 	seq_printf(seq, "Scan:       %s\n",
287 		   atomic_read(&priv->scan.in_progress) ? "active" : "idle");
288 
289 	return 0;
290 }
291 
292 static int cw1200_status_open(struct inode *inode, struct file *file)
293 {
294 	return single_open(file, &cw1200_status_show,
295 		inode->i_private);
296 }
297 
298 static const struct file_operations fops_status = {
299 	.open = cw1200_status_open,
300 	.read = seq_read,
301 	.llseek = seq_lseek,
302 	.release = single_release,
303 	.owner = THIS_MODULE,
304 };
305 
306 static int cw1200_counters_show(struct seq_file *seq, void *v)
307 {
308 	int ret;
309 	struct cw1200_common *priv = seq->private;
310 	struct wsm_mib_counters_table counters;
311 
312 	ret = wsm_get_counters_table(priv, &counters);
313 	if (ret)
314 		return ret;
315 
316 #define PUT_COUNTER(tab, name) \
317 	seq_printf(seq, "%s:" tab "%d\n", #name, \
318 		__le32_to_cpu(counters.name))
319 
320 	PUT_COUNTER("\t\t", plcp_errors);
321 	PUT_COUNTER("\t\t", fcs_errors);
322 	PUT_COUNTER("\t\t", tx_packets);
323 	PUT_COUNTER("\t\t", rx_packets);
324 	PUT_COUNTER("\t\t", rx_packet_errors);
325 	PUT_COUNTER("\t",   rx_decryption_failures);
326 	PUT_COUNTER("\t\t", rx_mic_failures);
327 	PUT_COUNTER("\t",   rx_no_key_failures);
328 	PUT_COUNTER("\t",   tx_multicast_frames);
329 	PUT_COUNTER("\t",   tx_frames_success);
330 	PUT_COUNTER("\t",   tx_frame_failures);
331 	PUT_COUNTER("\t",   tx_frames_retried);
332 	PUT_COUNTER("\t",   tx_frames_multi_retried);
333 	PUT_COUNTER("\t",   rx_frame_duplicates);
334 	PUT_COUNTER("\t\t", rts_success);
335 	PUT_COUNTER("\t\t", rts_failures);
336 	PUT_COUNTER("\t\t", ack_failures);
337 	PUT_COUNTER("\t",   rx_multicast_frames);
338 	PUT_COUNTER("\t",   rx_frames_success);
339 	PUT_COUNTER("\t",   rx_cmac_icv_errors);
340 	PUT_COUNTER("\t\t", rx_cmac_replays);
341 	PUT_COUNTER("\t",   rx_mgmt_ccmp_replays);
342 
343 #undef PUT_COUNTER
344 
345 	return 0;
346 }
347 
348 static int cw1200_counters_open(struct inode *inode, struct file *file)
349 {
350 	return single_open(file, &cw1200_counters_show,
351 		inode->i_private);
352 }
353 
354 static const struct file_operations fops_counters = {
355 	.open = cw1200_counters_open,
356 	.read = seq_read,
357 	.llseek = seq_lseek,
358 	.release = single_release,
359 	.owner = THIS_MODULE,
360 };
361 
362 static ssize_t cw1200_wsm_dumps(struct file *file,
363 	const char __user *user_buf, size_t count, loff_t *ppos)
364 {
365 	struct cw1200_common *priv = file->private_data;
366 	char buf[1];
367 
368 	if (!count)
369 		return -EINVAL;
370 	if (copy_from_user(buf, user_buf, 1))
371 		return -EFAULT;
372 
373 	if (buf[0] == '1')
374 		priv->wsm_enable_wsm_dumps = 1;
375 	else
376 		priv->wsm_enable_wsm_dumps = 0;
377 
378 	return count;
379 }
380 
381 static const struct file_operations fops_wsm_dumps = {
382 	.open = simple_open,
383 	.write = cw1200_wsm_dumps,
384 	.llseek = default_llseek,
385 };
386 
387 int cw1200_debug_init(struct cw1200_common *priv)
388 {
389 	int ret = -ENOMEM;
390 	struct cw1200_debug_priv *d = kzalloc(sizeof(struct cw1200_debug_priv),
391 			GFP_KERNEL);
392 	priv->debug = d;
393 	if (!d)
394 		return ret;
395 
396 	d->debugfs_phy = debugfs_create_dir("cw1200",
397 					    priv->hw->wiphy->debugfsdir);
398 	if (!d->debugfs_phy)
399 		goto err;
400 
401 	if (!debugfs_create_file("status", 0400, d->debugfs_phy,
402 				 priv, &fops_status))
403 		goto err;
404 
405 	if (!debugfs_create_file("counters", 0400, d->debugfs_phy,
406 				 priv, &fops_counters))
407 		goto err;
408 
409 	if (!debugfs_create_file("wsm_dumps", 0200, d->debugfs_phy,
410 				 priv, &fops_wsm_dumps))
411 		goto err;
412 
413 	return 0;
414 
415 err:
416 	priv->debug = NULL;
417 	debugfs_remove_recursive(d->debugfs_phy);
418 	kfree(d);
419 	return ret;
420 }
421 
422 void cw1200_debug_release(struct cw1200_common *priv)
423 {
424 	struct cw1200_debug_priv *d = priv->debug;
425 	if (d) {
426 		debugfs_remove_recursive(d->debugfs_phy);
427 		priv->debug = NULL;
428 		kfree(d);
429 	}
430 }
431