Loading...
Note: File does not exist in v6.8.
1/*
2 * Copyright (C) 2008, cozybit Inc.
3 * Copyright (C) 2003-2006, Marvell International Ltd.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
9 */
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/hardirq.h>
13#include <linux/slab.h>
14
15#include "libertas_tf.h"
16
17static const struct channel_range channel_ranges[] = {
18 { LBTF_REGDOMAIN_US, 1, 12 },
19 { LBTF_REGDOMAIN_CA, 1, 12 },
20 { LBTF_REGDOMAIN_EU, 1, 14 },
21 { LBTF_REGDOMAIN_JP, 1, 14 },
22 { LBTF_REGDOMAIN_SP, 1, 14 },
23 { LBTF_REGDOMAIN_FR, 1, 14 },
24};
25
26static u16 lbtf_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
27{
28 LBTF_REGDOMAIN_US, LBTF_REGDOMAIN_CA, LBTF_REGDOMAIN_EU,
29 LBTF_REGDOMAIN_SP, LBTF_REGDOMAIN_FR, LBTF_REGDOMAIN_JP,
30};
31
32static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv);
33
34
35/**
36 * lbtf_cmd_copyback - Simple callback that copies response back into command
37 *
38 * @priv A pointer to struct lbtf_private structure
39 * @extra A pointer to the original command structure for which
40 * 'resp' is a response
41 * @resp A pointer to the command response
42 *
43 * Returns: 0 on success, error on failure
44 */
45int lbtf_cmd_copyback(struct lbtf_private *priv, unsigned long extra,
46 struct cmd_header *resp)
47{
48 struct cmd_header *buf = (void *)extra;
49 uint16_t copy_len;
50
51 copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
52 memcpy(buf, resp, copy_len);
53 return 0;
54}
55EXPORT_SYMBOL_GPL(lbtf_cmd_copyback);
56
57#define CHAN_TO_IDX(chan) ((chan) - 1)
58
59static void lbtf_geo_init(struct lbtf_private *priv)
60{
61 const struct channel_range *range = channel_ranges;
62 u8 ch;
63 int i;
64
65 for (i = 0; i < ARRAY_SIZE(channel_ranges); i++)
66 if (channel_ranges[i].regdomain == priv->regioncode) {
67 range = &channel_ranges[i];
68 break;
69 }
70
71 for (ch = priv->range.start; ch < priv->range.end; ch++)
72 priv->channels[CHAN_TO_IDX(ch)].flags = 0;
73}
74
75/**
76 * lbtf_update_hw_spec: Updates the hardware details.
77 *
78 * @priv A pointer to struct lbtf_private structure
79 *
80 * Returns: 0 on success, error on failure
81 */
82int lbtf_update_hw_spec(struct lbtf_private *priv)
83{
84 struct cmd_ds_get_hw_spec cmd;
85 int ret = -1;
86 u32 i;
87
88 lbtf_deb_enter(LBTF_DEB_CMD);
89
90 memset(&cmd, 0, sizeof(cmd));
91 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
92 memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
93 ret = lbtf_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
94 if (ret)
95 goto out;
96
97 priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
98
99 /* The firmware release is in an interesting format: the patch
100 * level is in the most significant nibble ... so fix that: */
101 priv->fwrelease = le32_to_cpu(cmd.fwrelease);
102 priv->fwrelease = (priv->fwrelease << 8) |
103 (priv->fwrelease >> 24 & 0xff);
104
105 printk(KERN_INFO "libertastf: %pM, fw %u.%u.%up%u, cap 0x%08x\n",
106 cmd.permanentaddr,
107 priv->fwrelease >> 24 & 0xff,
108 priv->fwrelease >> 16 & 0xff,
109 priv->fwrelease >> 8 & 0xff,
110 priv->fwrelease & 0xff,
111 priv->fwcapinfo);
112 lbtf_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
113 cmd.hwifversion, cmd.version);
114
115 /* Clamp region code to 8-bit since FW spec indicates that it should
116 * only ever be 8-bit, even though the field size is 16-bit. Some
117 * firmware returns non-zero high 8 bits here.
118 */
119 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
120
121 for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
122 /* use the region code to search for the index */
123 if (priv->regioncode == lbtf_region_code_to_index[i])
124 break;
125 }
126
127 /* if it's unidentified region code, use the default (USA) */
128 if (i >= MRVDRV_MAX_REGION_CODE) {
129 priv->regioncode = 0x10;
130 pr_info("unidentified region code; using the default (USA)\n");
131 }
132
133 if (priv->current_addr[0] == 0xff)
134 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
135
136 SET_IEEE80211_PERM_ADDR(priv->hw, priv->current_addr);
137
138 lbtf_geo_init(priv);
139out:
140 lbtf_deb_leave(LBTF_DEB_CMD);
141 return ret;
142}
143
144/**
145 * lbtf_set_channel: Set the radio channel
146 *
147 * @priv A pointer to struct lbtf_private structure
148 * @channel The desired channel, or 0 to clear a locked channel
149 *
150 * Returns: 0 on success, error on failure
151 */
152int lbtf_set_channel(struct lbtf_private *priv, u8 channel)
153{
154 int ret = 0;
155 struct cmd_ds_802_11_rf_channel cmd;
156
157 lbtf_deb_enter(LBTF_DEB_CMD);
158
159 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
160 cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
161 cmd.channel = cpu_to_le16(channel);
162
163 ret = lbtf_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
164 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
165 return ret;
166}
167
168int lbtf_beacon_set(struct lbtf_private *priv, struct sk_buff *beacon)
169{
170 struct cmd_ds_802_11_beacon_set cmd;
171 int size;
172
173 lbtf_deb_enter(LBTF_DEB_CMD);
174
175 if (beacon->len > MRVL_MAX_BCN_SIZE) {
176 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", -1);
177 return -1;
178 }
179 size = sizeof(cmd) - sizeof(cmd.beacon) + beacon->len;
180 cmd.hdr.size = cpu_to_le16(size);
181 cmd.len = cpu_to_le16(beacon->len);
182 memcpy(cmd.beacon, (u8 *) beacon->data, beacon->len);
183
184 lbtf_cmd_async(priv, CMD_802_11_BEACON_SET, &cmd.hdr, size);
185
186 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", 0);
187 return 0;
188}
189
190int lbtf_beacon_ctrl(struct lbtf_private *priv, bool beacon_enable,
191 int beacon_int)
192{
193 struct cmd_ds_802_11_beacon_control cmd;
194 lbtf_deb_enter(LBTF_DEB_CMD);
195
196 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
197 cmd.action = cpu_to_le16(CMD_ACT_SET);
198 cmd.beacon_enable = cpu_to_le16(beacon_enable);
199 cmd.beacon_period = cpu_to_le16(beacon_int);
200
201 lbtf_cmd_async(priv, CMD_802_11_BEACON_CTRL, &cmd.hdr, sizeof(cmd));
202
203 lbtf_deb_leave(LBTF_DEB_CMD);
204 return 0;
205}
206
207static void lbtf_queue_cmd(struct lbtf_private *priv,
208 struct cmd_ctrl_node *cmdnode)
209{
210 unsigned long flags;
211 lbtf_deb_enter(LBTF_DEB_HOST);
212
213 if (!cmdnode) {
214 lbtf_deb_host("QUEUE_CMD: cmdnode is NULL\n");
215 goto qcmd_done;
216 }
217
218 if (!cmdnode->cmdbuf->size) {
219 lbtf_deb_host("DNLD_CMD: cmd size is zero\n");
220 goto qcmd_done;
221 }
222
223 cmdnode->result = 0;
224 spin_lock_irqsave(&priv->driver_lock, flags);
225 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
226 spin_unlock_irqrestore(&priv->driver_lock, flags);
227
228 lbtf_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
229 le16_to_cpu(cmdnode->cmdbuf->command));
230
231qcmd_done:
232 lbtf_deb_leave(LBTF_DEB_HOST);
233}
234
235static void lbtf_submit_command(struct lbtf_private *priv,
236 struct cmd_ctrl_node *cmdnode)
237{
238 unsigned long flags;
239 struct cmd_header *cmd;
240 uint16_t cmdsize;
241 uint16_t command;
242 int timeo = 5 * HZ;
243 int ret;
244
245 lbtf_deb_enter(LBTF_DEB_HOST);
246
247 cmd = cmdnode->cmdbuf;
248
249 spin_lock_irqsave(&priv->driver_lock, flags);
250 priv->cur_cmd = cmdnode;
251 cmdsize = le16_to_cpu(cmd->size);
252 command = le16_to_cpu(cmd->command);
253
254 lbtf_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
255 command, le16_to_cpu(cmd->seqnum), cmdsize);
256 lbtf_deb_hex(LBTF_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
257
258 ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
259 spin_unlock_irqrestore(&priv->driver_lock, flags);
260
261 if (ret) {
262 pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
263 /* Let the timer kick in and retry, and potentially reset
264 the whole thing if the condition persists */
265 timeo = HZ;
266 }
267
268 /* Setup the timer after transmit command */
269 mod_timer(&priv->command_timer, jiffies + timeo);
270
271 lbtf_deb_leave(LBTF_DEB_HOST);
272}
273
274/**
275 * This function inserts command node to cmdfreeq
276 * after cleans it. Requires priv->driver_lock held.
277 */
278static void __lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
279 struct cmd_ctrl_node *cmdnode)
280{
281 lbtf_deb_enter(LBTF_DEB_HOST);
282
283 if (!cmdnode)
284 goto cl_ins_out;
285
286 cmdnode->callback = NULL;
287 cmdnode->callback_arg = 0;
288
289 memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
290
291 list_add_tail(&cmdnode->list, &priv->cmdfreeq);
292
293cl_ins_out:
294 lbtf_deb_leave(LBTF_DEB_HOST);
295}
296
297static void lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
298 struct cmd_ctrl_node *ptempcmd)
299{
300 unsigned long flags;
301
302 spin_lock_irqsave(&priv->driver_lock, flags);
303 __lbtf_cleanup_and_insert_cmd(priv, ptempcmd);
304 spin_unlock_irqrestore(&priv->driver_lock, flags);
305}
306
307void lbtf_complete_command(struct lbtf_private *priv, struct cmd_ctrl_node *cmd,
308 int result)
309{
310 cmd->result = result;
311 cmd->cmdwaitqwoken = 1;
312 wake_up_interruptible(&cmd->cmdwait_q);
313
314 if (!cmd->callback)
315 __lbtf_cleanup_and_insert_cmd(priv, cmd);
316 priv->cur_cmd = NULL;
317}
318
319int lbtf_cmd_set_mac_multicast_addr(struct lbtf_private *priv)
320{
321 struct cmd_ds_mac_multicast_addr cmd;
322
323 lbtf_deb_enter(LBTF_DEB_CMD);
324
325 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
326 cmd.action = cpu_to_le16(CMD_ACT_SET);
327
328 cmd.nr_of_adrs = cpu_to_le16((u16) priv->nr_of_multicastmacaddr);
329
330 lbtf_deb_cmd("MULTICAST_ADR: setting %d addresses\n", cmd.nr_of_adrs);
331
332 memcpy(cmd.maclist, priv->multicastlist,
333 priv->nr_of_multicastmacaddr * ETH_ALEN);
334
335 lbtf_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &cmd.hdr, sizeof(cmd));
336
337 lbtf_deb_leave(LBTF_DEB_CMD);
338 return 0;
339}
340
341void lbtf_set_mode(struct lbtf_private *priv, enum lbtf_mode mode)
342{
343 struct cmd_ds_set_mode cmd;
344 lbtf_deb_enter(LBTF_DEB_WEXT);
345
346 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
347 cmd.mode = cpu_to_le16(mode);
348 lbtf_deb_wext("Switching to mode: 0x%x\n", mode);
349 lbtf_cmd_async(priv, CMD_802_11_SET_MODE, &cmd.hdr, sizeof(cmd));
350
351 lbtf_deb_leave(LBTF_DEB_WEXT);
352}
353
354void lbtf_set_bssid(struct lbtf_private *priv, bool activate, const u8 *bssid)
355{
356 struct cmd_ds_set_bssid cmd;
357 lbtf_deb_enter(LBTF_DEB_CMD);
358
359 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
360 cmd.activate = activate ? 1 : 0;
361 if (activate)
362 memcpy(cmd.bssid, bssid, ETH_ALEN);
363
364 lbtf_cmd_async(priv, CMD_802_11_SET_BSSID, &cmd.hdr, sizeof(cmd));
365 lbtf_deb_leave(LBTF_DEB_CMD);
366}
367
368int lbtf_set_mac_address(struct lbtf_private *priv, uint8_t *mac_addr)
369{
370 struct cmd_ds_802_11_mac_address cmd;
371 lbtf_deb_enter(LBTF_DEB_CMD);
372
373 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
374 cmd.action = cpu_to_le16(CMD_ACT_SET);
375
376 memcpy(cmd.macadd, mac_addr, ETH_ALEN);
377
378 lbtf_cmd_async(priv, CMD_802_11_MAC_ADDRESS, &cmd.hdr, sizeof(cmd));
379 lbtf_deb_leave(LBTF_DEB_CMD);
380 return 0;
381}
382
383int lbtf_set_radio_control(struct lbtf_private *priv)
384{
385 int ret = 0;
386 struct cmd_ds_802_11_radio_control cmd;
387
388 lbtf_deb_enter(LBTF_DEB_CMD);
389
390 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
391 cmd.action = cpu_to_le16(CMD_ACT_SET);
392
393 switch (priv->preamble) {
394 case CMD_TYPE_SHORT_PREAMBLE:
395 cmd.control = cpu_to_le16(SET_SHORT_PREAMBLE);
396 break;
397
398 case CMD_TYPE_LONG_PREAMBLE:
399 cmd.control = cpu_to_le16(SET_LONG_PREAMBLE);
400 break;
401
402 case CMD_TYPE_AUTO_PREAMBLE:
403 default:
404 cmd.control = cpu_to_le16(SET_AUTO_PREAMBLE);
405 break;
406 }
407
408 if (priv->radioon)
409 cmd.control |= cpu_to_le16(TURN_ON_RF);
410 else
411 cmd.control &= cpu_to_le16(~TURN_ON_RF);
412
413 lbtf_deb_cmd("RADIO_SET: radio %d, preamble %d\n", priv->radioon,
414 priv->preamble);
415
416 ret = lbtf_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
417
418 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
419 return ret;
420}
421
422void lbtf_set_mac_control(struct lbtf_private *priv)
423{
424 struct cmd_ds_mac_control cmd;
425 lbtf_deb_enter(LBTF_DEB_CMD);
426
427 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
428 cmd.action = cpu_to_le16(priv->mac_control);
429 cmd.reserved = 0;
430
431 lbtf_cmd_async(priv, CMD_MAC_CONTROL,
432 &cmd.hdr, sizeof(cmd));
433
434 lbtf_deb_leave(LBTF_DEB_CMD);
435}
436
437/**
438 * lbtf_allocate_cmd_buffer - Allocates cmd buffer, links it to free cmd queue
439 *
440 * @priv A pointer to struct lbtf_private structure
441 *
442 * Returns: 0 on success.
443 */
444int lbtf_allocate_cmd_buffer(struct lbtf_private *priv)
445{
446 int ret = 0;
447 u32 bufsize;
448 u32 i;
449 struct cmd_ctrl_node *cmdarray;
450
451 lbtf_deb_enter(LBTF_DEB_HOST);
452
453 /* Allocate and initialize the command array */
454 bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
455 cmdarray = kzalloc(bufsize, GFP_KERNEL);
456 if (!cmdarray) {
457 lbtf_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
458 ret = -1;
459 goto done;
460 }
461 priv->cmd_array = cmdarray;
462
463 /* Allocate and initialize each command buffer in the command array */
464 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
465 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
466 if (!cmdarray[i].cmdbuf) {
467 lbtf_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
468 ret = -1;
469 goto done;
470 }
471 }
472
473 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
474 init_waitqueue_head(&cmdarray[i].cmdwait_q);
475 lbtf_cleanup_and_insert_cmd(priv, &cmdarray[i]);
476 }
477
478 ret = 0;
479
480done:
481 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret);
482 return ret;
483}
484
485/**
486 * lbtf_free_cmd_buffer - Frees the cmd buffer.
487 *
488 * @priv A pointer to struct lbtf_private structure
489 *
490 * Returns: 0
491 */
492int lbtf_free_cmd_buffer(struct lbtf_private *priv)
493{
494 struct cmd_ctrl_node *cmdarray;
495 unsigned int i;
496
497 lbtf_deb_enter(LBTF_DEB_HOST);
498
499 /* need to check if cmd array is allocated or not */
500 if (priv->cmd_array == NULL) {
501 lbtf_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
502 goto done;
503 }
504
505 cmdarray = priv->cmd_array;
506
507 /* Release shared memory buffers */
508 for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
509 kfree(cmdarray[i].cmdbuf);
510 cmdarray[i].cmdbuf = NULL;
511 }
512
513 /* Release cmd_ctrl_node */
514 kfree(priv->cmd_array);
515 priv->cmd_array = NULL;
516
517done:
518 lbtf_deb_leave(LBTF_DEB_HOST);
519 return 0;
520}
521
522/**
523 * lbtf_get_cmd_ctrl_node - Gets free cmd node from free cmd queue.
524 *
525 * @priv A pointer to struct lbtf_private structure
526 *
527 * Returns: pointer to a struct cmd_ctrl_node or NULL if none available.
528 */
529static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv)
530{
531 struct cmd_ctrl_node *tempnode;
532 unsigned long flags;
533
534 lbtf_deb_enter(LBTF_DEB_HOST);
535
536 if (!priv)
537 return NULL;
538
539 spin_lock_irqsave(&priv->driver_lock, flags);
540
541 if (!list_empty(&priv->cmdfreeq)) {
542 tempnode = list_first_entry(&priv->cmdfreeq,
543 struct cmd_ctrl_node, list);
544 list_del(&tempnode->list);
545 } else {
546 lbtf_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
547 tempnode = NULL;
548 }
549
550 spin_unlock_irqrestore(&priv->driver_lock, flags);
551
552 lbtf_deb_leave(LBTF_DEB_HOST);
553 return tempnode;
554}
555
556/**
557 * lbtf_execute_next_command: execute next command in cmd pending queue.
558 *
559 * @priv A pointer to struct lbtf_private structure
560 *
561 * Returns: 0 on success.
562 */
563int lbtf_execute_next_command(struct lbtf_private *priv)
564{
565 struct cmd_ctrl_node *cmdnode = NULL;
566 struct cmd_header *cmd;
567 unsigned long flags;
568 int ret = 0;
569
570 /* Debug group is lbtf_deb_THREAD and not lbtf_deb_HOST, because the
571 * only caller to us is lbtf_thread() and we get even when a
572 * data packet is received */
573 lbtf_deb_enter(LBTF_DEB_THREAD);
574
575 spin_lock_irqsave(&priv->driver_lock, flags);
576
577 if (priv->cur_cmd) {
578 pr_alert("EXEC_NEXT_CMD: already processing command!\n");
579 spin_unlock_irqrestore(&priv->driver_lock, flags);
580 ret = -1;
581 goto done;
582 }
583
584 if (!list_empty(&priv->cmdpendingq)) {
585 cmdnode = list_first_entry(&priv->cmdpendingq,
586 struct cmd_ctrl_node, list);
587 }
588
589 if (cmdnode) {
590 cmd = cmdnode->cmdbuf;
591
592 list_del(&cmdnode->list);
593 lbtf_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
594 le16_to_cpu(cmd->command));
595 spin_unlock_irqrestore(&priv->driver_lock, flags);
596 lbtf_submit_command(priv, cmdnode);
597 } else
598 spin_unlock_irqrestore(&priv->driver_lock, flags);
599
600 ret = 0;
601done:
602 lbtf_deb_leave(LBTF_DEB_THREAD);
603 return ret;
604}
605
606static struct cmd_ctrl_node *__lbtf_cmd_async(struct lbtf_private *priv,
607 uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
608 int (*callback)(struct lbtf_private *, unsigned long,
609 struct cmd_header *),
610 unsigned long callback_arg)
611{
612 struct cmd_ctrl_node *cmdnode;
613
614 lbtf_deb_enter(LBTF_DEB_HOST);
615
616 if (priv->surpriseremoved) {
617 lbtf_deb_host("PREP_CMD: card removed\n");
618 cmdnode = ERR_PTR(-ENOENT);
619 goto done;
620 }
621
622 cmdnode = lbtf_get_cmd_ctrl_node(priv);
623 if (cmdnode == NULL) {
624 lbtf_deb_host("PREP_CMD: cmdnode is NULL\n");
625
626 /* Wake up main thread to execute next command */
627 queue_work(lbtf_wq, &priv->cmd_work);
628 cmdnode = ERR_PTR(-ENOBUFS);
629 goto done;
630 }
631
632 cmdnode->callback = callback;
633 cmdnode->callback_arg = callback_arg;
634
635 /* Copy the incoming command to the buffer */
636 memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
637
638 /* Set sequence number, clean result, move to buffer */
639 priv->seqnum++;
640 cmdnode->cmdbuf->command = cpu_to_le16(command);
641 cmdnode->cmdbuf->size = cpu_to_le16(in_cmd_size);
642 cmdnode->cmdbuf->seqnum = cpu_to_le16(priv->seqnum);
643 cmdnode->cmdbuf->result = 0;
644
645 lbtf_deb_host("PREP_CMD: command 0x%04x\n", command);
646
647 cmdnode->cmdwaitqwoken = 0;
648 lbtf_queue_cmd(priv, cmdnode);
649 queue_work(lbtf_wq, &priv->cmd_work);
650
651 done:
652 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %p", cmdnode);
653 return cmdnode;
654}
655
656void lbtf_cmd_async(struct lbtf_private *priv, uint16_t command,
657 struct cmd_header *in_cmd, int in_cmd_size)
658{
659 lbtf_deb_enter(LBTF_DEB_CMD);
660 __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size, NULL, 0);
661 lbtf_deb_leave(LBTF_DEB_CMD);
662}
663
664int __lbtf_cmd(struct lbtf_private *priv, uint16_t command,
665 struct cmd_header *in_cmd, int in_cmd_size,
666 int (*callback)(struct lbtf_private *,
667 unsigned long, struct cmd_header *),
668 unsigned long callback_arg)
669{
670 struct cmd_ctrl_node *cmdnode;
671 unsigned long flags;
672 int ret = 0;
673
674 lbtf_deb_enter(LBTF_DEB_HOST);
675
676 cmdnode = __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size,
677 callback, callback_arg);
678 if (IS_ERR(cmdnode)) {
679 ret = PTR_ERR(cmdnode);
680 goto done;
681 }
682
683 might_sleep();
684 ret = wait_event_interruptible(cmdnode->cmdwait_q,
685 cmdnode->cmdwaitqwoken);
686 if (ret) {
687 pr_info("PREP_CMD: command 0x%04x interrupted by signal: %d\n",
688 command, ret);
689 goto done;
690 }
691
692 spin_lock_irqsave(&priv->driver_lock, flags);
693 ret = cmdnode->result;
694 if (ret)
695 pr_info("PREP_CMD: command 0x%04x failed: %d\n",
696 command, ret);
697
698 __lbtf_cleanup_and_insert_cmd(priv, cmdnode);
699 spin_unlock_irqrestore(&priv->driver_lock, flags);
700
701done:
702 lbtf_deb_leave_args(LBTF_DEB_HOST, "ret %d", ret);
703 return ret;
704}
705EXPORT_SYMBOL_GPL(__lbtf_cmd);
706
707/* Call holding driver_lock */
708void lbtf_cmd_response_rx(struct lbtf_private *priv)
709{
710 priv->cmd_response_rxed = 1;
711 queue_work(lbtf_wq, &priv->cmd_work);
712}
713EXPORT_SYMBOL_GPL(lbtf_cmd_response_rx);
714
715int lbtf_process_rx_command(struct lbtf_private *priv)
716{
717 uint16_t respcmd, curcmd;
718 struct cmd_header *resp;
719 int ret = 0;
720 unsigned long flags;
721 uint16_t result;
722
723 lbtf_deb_enter(LBTF_DEB_CMD);
724
725 mutex_lock(&priv->lock);
726 spin_lock_irqsave(&priv->driver_lock, flags);
727
728 if (!priv->cur_cmd) {
729 ret = -1;
730 spin_unlock_irqrestore(&priv->driver_lock, flags);
731 goto done;
732 }
733
734 resp = (void *)priv->cmd_resp_buff;
735 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
736 respcmd = le16_to_cpu(resp->command);
737 result = le16_to_cpu(resp->result);
738
739 if (net_ratelimit())
740 pr_info("libertastf: cmd response 0x%04x, seq %d, size %d\n",
741 respcmd, le16_to_cpu(resp->seqnum),
742 le16_to_cpu(resp->size));
743
744 if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
745 spin_unlock_irqrestore(&priv->driver_lock, flags);
746 ret = -1;
747 goto done;
748 }
749 if (respcmd != CMD_RET(curcmd)) {
750 spin_unlock_irqrestore(&priv->driver_lock, flags);
751 ret = -1;
752 goto done;
753 }
754
755 if (resp->result == cpu_to_le16(0x0004)) {
756 /* 0x0004 means -EAGAIN. Drop the response, let it time out
757 and be resubmitted */
758 spin_unlock_irqrestore(&priv->driver_lock, flags);
759 ret = -1;
760 goto done;
761 }
762
763 /* Now we got response from FW, cancel the command timer */
764 del_timer(&priv->command_timer);
765 priv->cmd_timed_out = 0;
766 if (priv->nr_retries)
767 priv->nr_retries = 0;
768
769 /* If the command is not successful, cleanup and return failure */
770 if ((result != 0 || !(respcmd & 0x8000))) {
771 /*
772 * Handling errors here
773 */
774 switch (respcmd) {
775 case CMD_RET(CMD_GET_HW_SPEC):
776 case CMD_RET(CMD_802_11_RESET):
777 pr_info("libertastf: reset failed\n");
778 break;
779
780 }
781 lbtf_complete_command(priv, priv->cur_cmd, result);
782 spin_unlock_irqrestore(&priv->driver_lock, flags);
783
784 ret = -1;
785 goto done;
786 }
787
788 spin_unlock_irqrestore(&priv->driver_lock, flags);
789
790 if (priv->cur_cmd && priv->cur_cmd->callback) {
791 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
792 resp);
793 }
794 spin_lock_irqsave(&priv->driver_lock, flags);
795
796 if (priv->cur_cmd) {
797 /* Clean up and Put current command back to cmdfreeq */
798 lbtf_complete_command(priv, priv->cur_cmd, result);
799 }
800 spin_unlock_irqrestore(&priv->driver_lock, flags);
801
802done:
803 mutex_unlock(&priv->lock);
804 lbtf_deb_leave_args(LBTF_DEB_CMD, "ret %d", ret);
805 return ret;
806}