1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2008, cozybit Inc.
4 * Copyright (C) 2003-2006, Marvell International Ltd.
5 */
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8 #include <linux/hardirq.h>
9 #include <linux/slab.h>
10 #include <linux/export.h>
11
12 #include "libertas_tf.h"
13
14 static const struct channel_range channel_ranges[] = {
15 { LBTF_REGDOMAIN_US, 1, 12 },
16 { LBTF_REGDOMAIN_CA, 1, 12 },
17 { LBTF_REGDOMAIN_EU, 1, 14 },
18 { LBTF_REGDOMAIN_JP, 1, 14 },
19 { LBTF_REGDOMAIN_SP, 1, 14 },
20 { LBTF_REGDOMAIN_FR, 1, 14 },
21 };
22
23 static u16 lbtf_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
24 {
25 LBTF_REGDOMAIN_US, LBTF_REGDOMAIN_CA, LBTF_REGDOMAIN_EU,
26 LBTF_REGDOMAIN_SP, LBTF_REGDOMAIN_FR, LBTF_REGDOMAIN_JP,
27 };
28
29 static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv);
30
31
32 /**
33 * lbtf_cmd_copyback - Simple callback that copies response back into command
34 *
35 * @priv: A pointer to struct lbtf_private structure
36 * @extra: A pointer to the original command structure for which
37 * 'resp' is a response
38 * @resp: A pointer to the command response
39 *
40 * Returns: 0 on success, error on failure
41 */
lbtf_cmd_copyback(struct lbtf_private * priv,unsigned long extra,struct cmd_header * resp)42 int lbtf_cmd_copyback(struct lbtf_private *priv, unsigned long extra,
43 struct cmd_header *resp)
44 {
45 struct cmd_header *buf = (void *)extra;
46 uint16_t copy_len;
47
48 copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
49 memcpy(buf, resp, copy_len);
50 return 0;
51 }
52 EXPORT_SYMBOL_GPL(lbtf_cmd_copyback);
53
54 #define CHAN_TO_IDX(chan) ((chan) - 1)
55
lbtf_geo_init(struct lbtf_private * priv)56 static void lbtf_geo_init(struct lbtf_private *priv)
57 {
58 const struct channel_range *range = channel_ranges;
59 u8 ch;
60 int i;
61
62 for (i = 0; i < ARRAY_SIZE(channel_ranges); i++)
63 if (channel_ranges[i].regdomain == priv->regioncode) {
64 range = &channel_ranges[i];
65 break;
66 }
67
68 for (ch = range->start; ch < range->end; ch++)
69 priv->channels[CHAN_TO_IDX(ch)].flags = 0;
70 }
71
72 /**
73 * lbtf_update_hw_spec: Updates the hardware details.
74 *
75 * @priv: A pointer to struct lbtf_private structure
76 *
77 * Returns: 0 on success, error on failure
78 */
lbtf_update_hw_spec(struct lbtf_private * priv)79 int lbtf_update_hw_spec(struct lbtf_private *priv)
80 {
81 struct cmd_ds_get_hw_spec cmd;
82 int ret = -1;
83 u32 i;
84
85 lbtf_deb_enter(LBTF_DEB_CMD);
86
87 memset(&cmd, 0, sizeof(cmd));
88 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
89 memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
90 ret = lbtf_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
91 if (ret)
92 goto out;
93
94 priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
95
96 /* The firmware release is in an interesting format: the patch
97 * level is in the most significant nibble ... so fix that: */
98 priv->fwrelease = le32_to_cpu(cmd.fwrelease);
99 priv->fwrelease = (priv->fwrelease << 8) |
100 (priv->fwrelease >> 24 & 0xff);
101
102 printk(KERN_INFO "libertastf: %pM, fw %u.%u.%up%u, cap 0x%08x\n",
103 cmd.permanentaddr,
104 priv->fwrelease >> 24 & 0xff,
105 priv->fwrelease >> 16 & 0xff,
106 priv->fwrelease >> 8 & 0xff,
107 priv->fwrelease & 0xff,
108 priv->fwcapinfo);
109 lbtf_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
110 cmd.hwifversion, cmd.version);
111
112 /* Clamp region code to 8-bit since FW spec indicates that it should
113 * only ever be 8-bit, even though the field size is 16-bit. Some
114 * firmware returns non-zero high 8 bits here.
115 */
116 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
117
118 for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
119 /* use the region code to search for the index */
120 if (priv->regioncode == lbtf_region_code_to_index[i])
121 break;
122 }
123
124 /* if it's unidentified region code, use the default (USA) */
125 if (i >= MRVDRV_MAX_REGION_CODE) {
126 priv->regioncode = 0x10;
127 pr_info("unidentified region code; using the default (USA)\n");
128 }
129
130 if (priv->current_addr[0] == 0xff)
131 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
132
133 SET_IEEE80211_PERM_ADDR(priv->hw, priv->current_addr);
134
135 lbtf_geo_init(priv);
136 out:
137 lbtf_deb_leave(LBTF_DEB_CMD);
138 return ret;
139 }
140
141 /**
142 * lbtf_set_channel: Set the radio channel
143 *
144 * @priv: A pointer to struct lbtf_private structure
145 * @channel: The desired channel, or 0 to clear a locked channel
146 *
147 * Returns: 0 on success, error on failure
148 */
lbtf_set_channel(struct lbtf_private * priv,u8 channel)149 int lbtf_set_channel(struct lbtf_private *priv, u8 channel)
150 {
151 int ret = 0;
152 struct cmd_ds_802_11_rf_channel cmd;
153
154 lbtf_deb_enter(LBTF_DEB_CMD);
155
156 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
157 cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
158 cmd.channel = cpu_to_le16(channel);
159
160 ret = lbtf_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
161 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
162 return ret;
163 }
164
lbtf_beacon_set(struct lbtf_private * priv,struct sk_buff * beacon)165 int lbtf_beacon_set(struct lbtf_private *priv, struct sk_buff *beacon)
166 {
167 struct cmd_ds_802_11_beacon_set cmd;
168 int size;
169
170 lbtf_deb_enter(LBTF_DEB_CMD);
171
172 if (beacon->len > MRVL_MAX_BCN_SIZE) {
173 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", -1);
174 return -1;
175 }
176 size = sizeof(cmd) - sizeof(cmd.beacon) + beacon->len;
177 cmd.hdr.size = cpu_to_le16(size);
178 cmd.len = cpu_to_le16(beacon->len);
179 memcpy(cmd.beacon, (u8 *) beacon->data, beacon->len);
180
181 lbtf_cmd_async(priv, CMD_802_11_BEACON_SET, &cmd.hdr, size);
182
183 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", 0);
184 return 0;
185 }
186
lbtf_beacon_ctrl(struct lbtf_private * priv,bool beacon_enable,int beacon_int)187 int lbtf_beacon_ctrl(struct lbtf_private *priv, bool beacon_enable,
188 int beacon_int)
189 {
190 struct cmd_ds_802_11_beacon_control cmd;
191 lbtf_deb_enter(LBTF_DEB_CMD);
192
193 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
194 cmd.action = cpu_to_le16(CMD_ACT_SET);
195 cmd.beacon_enable = cpu_to_le16(beacon_enable);
196 cmd.beacon_period = cpu_to_le16(beacon_int);
197
198 lbtf_cmd_async(priv, CMD_802_11_BEACON_CTRL, &cmd.hdr, sizeof(cmd));
199
200 lbtf_deb_leave(LBTF_DEB_CMD);
201 return 0;
202 }
203
lbtf_queue_cmd(struct lbtf_private * priv,struct cmd_ctrl_node * cmdnode)204 static void lbtf_queue_cmd(struct lbtf_private *priv,
205 struct cmd_ctrl_node *cmdnode)
206 {
207 unsigned long flags;
208 lbtf_deb_enter(LBTF_DEB_HOST);
209
210 if (!cmdnode) {
211 lbtf_deb_host("QUEUE_CMD: cmdnode is NULL\n");
212 goto qcmd_done;
213 }
214
215 if (!cmdnode->cmdbuf->size) {
216 lbtf_deb_host("DNLD_CMD: cmd size is zero\n");
217 goto qcmd_done;
218 }
219
220 cmdnode->result = 0;
221 spin_lock_irqsave(&priv->driver_lock, flags);
222 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
223 spin_unlock_irqrestore(&priv->driver_lock, flags);
224
225 lbtf_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
226 le16_to_cpu(cmdnode->cmdbuf->command));
227
228 qcmd_done:
229 lbtf_deb_leave(LBTF_DEB_HOST);
230 }
231
lbtf_submit_command(struct lbtf_private * priv,struct cmd_ctrl_node * cmdnode)232 static void lbtf_submit_command(struct lbtf_private *priv,
233 struct cmd_ctrl_node *cmdnode)
234 {
235 unsigned long flags;
236 struct cmd_header *cmd;
237 uint16_t cmdsize;
238 uint16_t command;
239 int timeo = 5 * HZ;
240 int ret;
241
242 lbtf_deb_enter(LBTF_DEB_HOST);
243
244 cmd = cmdnode->cmdbuf;
245
246 spin_lock_irqsave(&priv->driver_lock, flags);
247 priv->cur_cmd = cmdnode;
248 cmdsize = le16_to_cpu(cmd->size);
249 command = le16_to_cpu(cmd->command);
250
251 lbtf_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
252 command, le16_to_cpu(cmd->seqnum), cmdsize);
253 lbtf_deb_hex(LBTF_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
254
255 ret = priv->ops->hw_host_to_card(priv, MVMS_CMD, (u8 *)cmd, cmdsize);
256 spin_unlock_irqrestore(&priv->driver_lock, flags);
257
258 if (ret) {
259 pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
260 /* Let the timer kick in and retry, and potentially reset
261 the whole thing if the condition persists */
262 timeo = HZ;
263 }
264
265 /* Setup the timer after transmit command */
266 mod_timer(&priv->command_timer, jiffies + timeo);
267
268 lbtf_deb_leave(LBTF_DEB_HOST);
269 }
270
271 /*
272 * This function inserts command node to cmdfreeq
273 * after cleans it. Requires priv->driver_lock held.
274 */
__lbtf_cleanup_and_insert_cmd(struct lbtf_private * priv,struct cmd_ctrl_node * cmdnode)275 static void __lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
276 struct cmd_ctrl_node *cmdnode)
277 {
278 lbtf_deb_enter(LBTF_DEB_HOST);
279
280 if (!cmdnode)
281 goto cl_ins_out;
282
283 cmdnode->callback = NULL;
284 cmdnode->callback_arg = 0;
285
286 memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
287
288 list_add_tail(&cmdnode->list, &priv->cmdfreeq);
289
290 cl_ins_out:
291 lbtf_deb_leave(LBTF_DEB_HOST);
292 }
293
lbtf_cleanup_and_insert_cmd(struct lbtf_private * priv,struct cmd_ctrl_node * ptempcmd)294 static void lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
295 struct cmd_ctrl_node *ptempcmd)
296 {
297 unsigned long flags;
298
299 spin_lock_irqsave(&priv->driver_lock, flags);
300 __lbtf_cleanup_and_insert_cmd(priv, ptempcmd);
301 spin_unlock_irqrestore(&priv->driver_lock, flags);
302 }
303
lbtf_complete_command(struct lbtf_private * priv,struct cmd_ctrl_node * cmd,int result)304 void lbtf_complete_command(struct lbtf_private *priv, struct cmd_ctrl_node *cmd,
305 int result)
306 {
307 cmd->result = result;
308 cmd->cmdwaitqwoken = 1;
309 wake_up_interruptible(&cmd->cmdwait_q);
310
311 if (!cmd->callback)
312 __lbtf_cleanup_and_insert_cmd(priv, cmd);
313 priv->cur_cmd = NULL;
314 }
315
lbtf_cmd_set_mac_multicast_addr(struct lbtf_private * priv)316 int lbtf_cmd_set_mac_multicast_addr(struct lbtf_private *priv)
317 {
318 struct cmd_ds_mac_multicast_addr cmd;
319
320 lbtf_deb_enter(LBTF_DEB_CMD);
321
322 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
323 cmd.action = cpu_to_le16(CMD_ACT_SET);
324
325 cmd.nr_of_adrs = cpu_to_le16((u16) priv->nr_of_multicastmacaddr);
326
327 lbtf_deb_cmd("MULTICAST_ADR: setting %d addresses\n", cmd.nr_of_adrs);
328
329 memcpy(cmd.maclist, priv->multicastlist,
330 priv->nr_of_multicastmacaddr * ETH_ALEN);
331
332 lbtf_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &cmd.hdr, sizeof(cmd));
333
334 lbtf_deb_leave(LBTF_DEB_CMD);
335 return 0;
336 }
337
lbtf_set_mode(struct lbtf_private * priv,enum lbtf_mode mode)338 void lbtf_set_mode(struct lbtf_private *priv, enum lbtf_mode mode)
339 {
340 struct cmd_ds_set_mode cmd;
341 lbtf_deb_enter(LBTF_DEB_WEXT);
342
343 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
344 cmd.mode = cpu_to_le16(mode);
345 lbtf_deb_wext("Switching to mode: 0x%x\n", mode);
346 lbtf_cmd_async(priv, CMD_802_11_SET_MODE, &cmd.hdr, sizeof(cmd));
347
348 lbtf_deb_leave(LBTF_DEB_WEXT);
349 }
350
lbtf_set_bssid(struct lbtf_private * priv,bool activate,const u8 * bssid)351 void lbtf_set_bssid(struct lbtf_private *priv, bool activate, const u8 *bssid)
352 {
353 struct cmd_ds_set_bssid cmd;
354 lbtf_deb_enter(LBTF_DEB_CMD);
355
356 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
357 cmd.activate = activate ? 1 : 0;
358 if (activate)
359 memcpy(cmd.bssid, bssid, ETH_ALEN);
360
361 lbtf_cmd_async(priv, CMD_802_11_SET_BSSID, &cmd.hdr, sizeof(cmd));
362 lbtf_deb_leave(LBTF_DEB_CMD);
363 }
364
lbtf_set_mac_address(struct lbtf_private * priv,uint8_t * mac_addr)365 int lbtf_set_mac_address(struct lbtf_private *priv, uint8_t *mac_addr)
366 {
367 struct cmd_ds_802_11_mac_address cmd;
368 lbtf_deb_enter(LBTF_DEB_CMD);
369
370 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
371 cmd.action = cpu_to_le16(CMD_ACT_SET);
372
373 memcpy(cmd.macadd, mac_addr, ETH_ALEN);
374
375 lbtf_cmd_async(priv, CMD_802_11_MAC_ADDRESS, &cmd.hdr, sizeof(cmd));
376 lbtf_deb_leave(LBTF_DEB_CMD);
377 return 0;
378 }
379
lbtf_set_radio_control(struct lbtf_private * priv)380 int lbtf_set_radio_control(struct lbtf_private *priv)
381 {
382 int ret = 0;
383 struct cmd_ds_802_11_radio_control cmd;
384
385 lbtf_deb_enter(LBTF_DEB_CMD);
386
387 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
388 cmd.action = cpu_to_le16(CMD_ACT_SET);
389
390 switch (priv->preamble) {
391 case CMD_TYPE_SHORT_PREAMBLE:
392 cmd.control = cpu_to_le16(SET_SHORT_PREAMBLE);
393 break;
394
395 case CMD_TYPE_LONG_PREAMBLE:
396 cmd.control = cpu_to_le16(SET_LONG_PREAMBLE);
397 break;
398
399 case CMD_TYPE_AUTO_PREAMBLE:
400 default:
401 cmd.control = cpu_to_le16(SET_AUTO_PREAMBLE);
402 break;
403 }
404
405 if (priv->radioon)
406 cmd.control |= cpu_to_le16(TURN_ON_RF);
407 else
408 cmd.control &= cpu_to_le16(~TURN_ON_RF);
409
410 lbtf_deb_cmd("RADIO_SET: radio %d, preamble %d\n", priv->radioon,
411 priv->preamble);
412
413 ret = lbtf_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
414
415 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
416 return ret;
417 }
418
lbtf_set_mac_control(struct lbtf_private * priv)419 void lbtf_set_mac_control(struct lbtf_private *priv)
420 {
421 struct cmd_ds_mac_control cmd;
422 lbtf_deb_enter(LBTF_DEB_CMD);
423
424 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
425 cmd.action = cpu_to_le16(priv->mac_control);
426 cmd.reserved = 0;
427
428 lbtf_cmd_async(priv, CMD_MAC_CONTROL,
429 &cmd.hdr, sizeof(cmd));
430
431 lbtf_deb_leave(LBTF_DEB_CMD);
432 }
433
434 /**
435 * lbtf_allocate_cmd_buffer - Allocates cmd buffer, links it to free cmd queue
436 *
437 * @priv: A pointer to struct lbtf_private structure
438 *
439 * Returns: 0 on success.
440 */
lbtf_allocate_cmd_buffer(struct lbtf_private * priv)441 int lbtf_allocate_cmd_buffer(struct lbtf_private *priv)
442 {
443 int ret = 0;
444 u32 bufsize;
445 u32 i;
446 struct cmd_ctrl_node *cmdarray;
447
448 lbtf_deb_enter(LBTF_DEB_HOST);
449
450 /* Allocate and initialize the command array */
451 bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
452 cmdarray = kzalloc(bufsize, GFP_KERNEL);
453 if (!cmdarray) {
454 lbtf_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
455 ret = -1;
456 goto done;
457 }
458 priv->cmd_array = cmdarray;
459
460 /* Allocate and initialize each command buffer in the command array */
461 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
462 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
463 if (!cmdarray[i].cmdbuf) {
464 lbtf_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
465 ret = -1;
466 goto done;
467 }
468 }
469
470 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
471 init_waitqueue_head(&cmdarray[i].cmdwait_q);
472 lbtf_cleanup_and_insert_cmd(priv, &cmdarray[i]);
473 }
474
475 ret = 0;
476
477 done:
478 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret);
479 return ret;
480 }
481
482 /**
483 * lbtf_free_cmd_buffer - Frees the cmd buffer.
484 *
485 * @priv: A pointer to struct lbtf_private structure
486 *
487 * Returns: 0
488 */
lbtf_free_cmd_buffer(struct lbtf_private * priv)489 int lbtf_free_cmd_buffer(struct lbtf_private *priv)
490 {
491 struct cmd_ctrl_node *cmdarray;
492 unsigned int i;
493
494 lbtf_deb_enter(LBTF_DEB_HOST);
495
496 /* need to check if cmd array is allocated or not */
497 if (priv->cmd_array == NULL) {
498 lbtf_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
499 goto done;
500 }
501
502 cmdarray = priv->cmd_array;
503
504 /* Release shared memory buffers */
505 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
506 kfree(cmdarray[i].cmdbuf);
507 cmdarray[i].cmdbuf = NULL;
508 }
509
510 /* Release cmd_ctrl_node */
511 kfree(priv->cmd_array);
512 priv->cmd_array = NULL;
513
514 done:
515 lbtf_deb_leave(LBTF_DEB_HOST);
516 return 0;
517 }
518
519 /**
520 * lbtf_get_cmd_ctrl_node - Gets free cmd node from free cmd queue.
521 *
522 * @priv: A pointer to struct lbtf_private structure
523 *
524 * Returns: pointer to a struct cmd_ctrl_node or NULL if none available.
525 */
lbtf_get_cmd_ctrl_node(struct lbtf_private * priv)526 static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv)
527 {
528 struct cmd_ctrl_node *tempnode;
529 unsigned long flags;
530
531 lbtf_deb_enter(LBTF_DEB_HOST);
532
533 if (!priv)
534 return NULL;
535
536 spin_lock_irqsave(&priv->driver_lock, flags);
537
538 if (!list_empty(&priv->cmdfreeq)) {
539 tempnode = list_first_entry(&priv->cmdfreeq,
540 struct cmd_ctrl_node, list);
541 list_del(&tempnode->list);
542 } else {
543 lbtf_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
544 tempnode = NULL;
545 }
546
547 spin_unlock_irqrestore(&priv->driver_lock, flags);
548
549 lbtf_deb_leave(LBTF_DEB_HOST);
550 return tempnode;
551 }
552
553 /**
554 * lbtf_execute_next_command: execute next command in cmd pending queue.
555 *
556 * @priv: A pointer to struct lbtf_private structure
557 *
558 * Returns: 0 on success.
559 */
lbtf_execute_next_command(struct lbtf_private * priv)560 int lbtf_execute_next_command(struct lbtf_private *priv)
561 {
562 struct cmd_ctrl_node *cmdnode = NULL;
563 struct cmd_header *cmd;
564 unsigned long flags;
565 int ret = 0;
566
567 /* Debug group is lbtf_deb_THREAD and not lbtf_deb_HOST, because the
568 * only caller to us is lbtf_thread() and we get even when a
569 * data packet is received */
570 lbtf_deb_enter(LBTF_DEB_THREAD);
571
572 spin_lock_irqsave(&priv->driver_lock, flags);
573
574 if (priv->cur_cmd) {
575 pr_alert("EXEC_NEXT_CMD: already processing command!\n");
576 spin_unlock_irqrestore(&priv->driver_lock, flags);
577 ret = -1;
578 goto done;
579 }
580
581 if (!list_empty(&priv->cmdpendingq)) {
582 cmdnode = list_first_entry(&priv->cmdpendingq,
583 struct cmd_ctrl_node, list);
584 }
585
586 if (cmdnode) {
587 cmd = cmdnode->cmdbuf;
588
589 list_del(&cmdnode->list);
590 lbtf_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
591 le16_to_cpu(cmd->command));
592 spin_unlock_irqrestore(&priv->driver_lock, flags);
593 lbtf_submit_command(priv, cmdnode);
594 } else
595 spin_unlock_irqrestore(&priv->driver_lock, flags);
596
597 ret = 0;
598 done:
599 lbtf_deb_leave(LBTF_DEB_THREAD);
600 return ret;
601 }
602
__lbtf_cmd_async(struct lbtf_private * priv,uint16_t command,struct cmd_header * in_cmd,int in_cmd_size,int (* callback)(struct lbtf_private *,unsigned long,struct cmd_header *),unsigned long callback_arg)603 static struct cmd_ctrl_node *__lbtf_cmd_async(struct lbtf_private *priv,
604 uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
605 int (*callback)(struct lbtf_private *, unsigned long,
606 struct cmd_header *),
607 unsigned long callback_arg)
608 {
609 struct cmd_ctrl_node *cmdnode;
610
611 lbtf_deb_enter(LBTF_DEB_HOST);
612
613 if (priv->surpriseremoved) {
614 lbtf_deb_host("PREP_CMD: card removed\n");
615 cmdnode = ERR_PTR(-ENOENT);
616 goto done;
617 }
618
619 cmdnode = lbtf_get_cmd_ctrl_node(priv);
620 if (cmdnode == NULL) {
621 lbtf_deb_host("PREP_CMD: cmdnode is NULL\n");
622
623 /* Wake up main thread to execute next command */
624 queue_work(lbtf_wq, &priv->cmd_work);
625 cmdnode = ERR_PTR(-ENOBUFS);
626 goto done;
627 }
628
629 cmdnode->callback = callback;
630 cmdnode->callback_arg = callback_arg;
631
632 /* Copy the incoming command to the buffer */
633 memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
634
635 /* Set sequence number, clean result, move to buffer */
636 priv->seqnum++;
637 cmdnode->cmdbuf->command = cpu_to_le16(command);
638 cmdnode->cmdbuf->size = cpu_to_le16(in_cmd_size);
639 cmdnode->cmdbuf->seqnum = cpu_to_le16(priv->seqnum);
640 cmdnode->cmdbuf->result = 0;
641
642 lbtf_deb_host("PREP_CMD: command 0x%04x\n", command);
643
644 cmdnode->cmdwaitqwoken = 0;
645 lbtf_queue_cmd(priv, cmdnode);
646 queue_work(lbtf_wq, &priv->cmd_work);
647
648 done:
649 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %p", cmdnode);
650 return cmdnode;
651 }
652
lbtf_cmd_async(struct lbtf_private * priv,uint16_t command,struct cmd_header * in_cmd,int in_cmd_size)653 void lbtf_cmd_async(struct lbtf_private *priv, uint16_t command,
654 struct cmd_header *in_cmd, int in_cmd_size)
655 {
656 lbtf_deb_enter(LBTF_DEB_CMD);
657 __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size, NULL, 0);
658 lbtf_deb_leave(LBTF_DEB_CMD);
659 }
660
__lbtf_cmd(struct lbtf_private * priv,uint16_t command,struct cmd_header * in_cmd,int in_cmd_size,int (* callback)(struct lbtf_private *,unsigned long,struct cmd_header *),unsigned long callback_arg)661 int __lbtf_cmd(struct lbtf_private *priv, uint16_t command,
662 struct cmd_header *in_cmd, int in_cmd_size,
663 int (*callback)(struct lbtf_private *,
664 unsigned long, struct cmd_header *),
665 unsigned long callback_arg)
666 {
667 struct cmd_ctrl_node *cmdnode;
668 unsigned long flags;
669 int ret = 0;
670
671 lbtf_deb_enter(LBTF_DEB_HOST);
672
673 cmdnode = __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size,
674 callback, callback_arg);
675 if (IS_ERR(cmdnode)) {
676 ret = PTR_ERR(cmdnode);
677 goto done;
678 }
679
680 might_sleep();
681 ret = wait_event_interruptible(cmdnode->cmdwait_q,
682 cmdnode->cmdwaitqwoken);
683 if (ret) {
684 pr_info("PREP_CMD: command 0x%04x interrupted by signal: %d\n",
685 command, ret);
686 goto done;
687 }
688
689 spin_lock_irqsave(&priv->driver_lock, flags);
690 ret = cmdnode->result;
691 if (ret)
692 pr_info("PREP_CMD: command 0x%04x failed: %d\n",
693 command, ret);
694
695 __lbtf_cleanup_and_insert_cmd(priv, cmdnode);
696 spin_unlock_irqrestore(&priv->driver_lock, flags);
697
698 done:
699 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret);
700 return ret;
701 }
702 EXPORT_SYMBOL_GPL(__lbtf_cmd);
703
704 /* Call holding driver_lock */
lbtf_cmd_response_rx(struct lbtf_private * priv)705 void lbtf_cmd_response_rx(struct lbtf_private *priv)
706 {
707 priv->cmd_response_rxed = 1;
708 queue_work(lbtf_wq, &priv->cmd_work);
709 }
710 EXPORT_SYMBOL_GPL(lbtf_cmd_response_rx);
711
lbtf_process_rx_command(struct lbtf_private * priv)712 int lbtf_process_rx_command(struct lbtf_private *priv)
713 {
714 uint16_t respcmd, curcmd;
715 struct cmd_header *resp;
716 int ret = 0;
717 unsigned long flags;
718 uint16_t result;
719
720 lbtf_deb_enter(LBTF_DEB_CMD);
721
722 mutex_lock(&priv->lock);
723 spin_lock_irqsave(&priv->driver_lock, flags);
724
725 if (!priv->cur_cmd) {
726 ret = -1;
727 spin_unlock_irqrestore(&priv->driver_lock, flags);
728 goto done;
729 }
730
731 resp = (void *)priv->cmd_resp_buff;
732 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
733 respcmd = le16_to_cpu(resp->command);
734 result = le16_to_cpu(resp->result);
735
736 lbtf_deb_cmd("libertastf: cmd response 0x%04x, seq %d, size %d\n",
737 respcmd, le16_to_cpu(resp->seqnum),
738 le16_to_cpu(resp->size));
739
740 if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
741 spin_unlock_irqrestore(&priv->driver_lock, flags);
742 ret = -1;
743 goto done;
744 }
745 if (respcmd != CMD_RET(curcmd)) {
746 spin_unlock_irqrestore(&priv->driver_lock, flags);
747 ret = -1;
748 goto done;
749 }
750
751 if (resp->result == cpu_to_le16(0x0004)) {
752 /* 0x0004 means -EAGAIN. Drop the response, let it time out
753 and be resubmitted */
754 spin_unlock_irqrestore(&priv->driver_lock, flags);
755 ret = -1;
756 goto done;
757 }
758
759 /* Now we got response from FW, cancel the command timer */
760 del_timer(&priv->command_timer);
761 priv->cmd_timed_out = 0;
762 if (priv->nr_retries)
763 priv->nr_retries = 0;
764
765 /* If the command is not successful, cleanup and return failure */
766 if ((result != 0 || !(respcmd & 0x8000))) {
767 /*
768 * Handling errors here
769 */
770 switch (respcmd) {
771 case CMD_RET(CMD_GET_HW_SPEC):
772 case CMD_RET(CMD_802_11_RESET):
773 pr_info("libertastf: reset failed\n");
774 break;
775
776 }
777 lbtf_complete_command(priv, priv->cur_cmd, result);
778 spin_unlock_irqrestore(&priv->driver_lock, flags);
779
780 ret = -1;
781 goto done;
782 }
783
784 spin_unlock_irqrestore(&priv->driver_lock, flags);
785
786 if (priv->cur_cmd && priv->cur_cmd->callback) {
787 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
788 resp);
789 }
790 spin_lock_irqsave(&priv->driver_lock, flags);
791
792 if (priv->cur_cmd) {
793 /* Clean up and Put current command back to cmdfreeq */
794 lbtf_complete_command(priv, priv->cur_cmd, result);
795 }
796 spin_unlock_irqrestore(&priv->driver_lock, flags);
797
798 done:
799 mutex_unlock(&priv->lock);
800 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
801 return ret;
802 }
803