Commit | Line | Data |
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635d2b00 GKH |
1 | /* |
2 | * --------------------------------------------------------------------------- | |
3 | * FILE: io.c | |
4 | * | |
5 | * PURPOSE: | |
6 | * This file contains routines that the SDIO driver can call when a | |
7 | * UniFi card is first inserted (or detected) and removed. | |
8 | * | |
9 | * When used with sdioemb, the udev scripts (at least on Ubuntu) don't | |
10 | * recognise a UniFi being added to the system. This is because sdioemb | |
11 | * does not register itself as a device_driver, it uses it's own code | |
12 | * to handle insert and remove. | |
13 | * To have Ubuntu recognise UniFi, edit /etc/udev/rules.d/85-ifupdown.rules | |
14 | * to change this line: | |
15 | * SUBSYSTEM=="net", DRIVERS=="?*", GOTO="net_start" | |
16 | * to these: | |
17 | * #SUBSYSTEM=="net", DRIVERS=="?*", GOTO="net_start" | |
18 | * SUBSYSTEM=="net", GOTO="net_start" | |
19 | * | |
20 | * Then you can add a stanza to /etc/network/interfaces like this: | |
21 | * auto eth1 | |
22 | * iface eth1 inet dhcp | |
23 | * wpa-conf /etc/wpa_supplicant.conf | |
24 | * This will then automatically associate when a car dis inserted. | |
25 | * | |
26 | * Copyright (C) 2006-2009 by Cambridge Silicon Radio Ltd. | |
27 | * | |
28 | * Refer to LICENSE.txt included with this source code for details on | |
29 | * the license terms. | |
30 | * | |
31 | * --------------------------------------------------------------------------- | |
32 | */ | |
33 | #include <linux/proc_fs.h> | |
294a08e4 | 34 | #include <linux/seq_file.h> |
635d2b00 GKH |
35 | |
36 | #include "csr_wifi_hip_unifi.h" | |
37 | #include "csr_wifi_hip_unifiversion.h" | |
38 | #include "csr_wifi_hip_unifi_udi.h" /* for unifi_print_status() */ | |
39 | #include "unifiio.h" | |
40 | #include "unifi_priv.h" | |
41 | ||
635d2b00 GKH |
42 | /* |
43 | * Array of pointers to context structs for unifi devices that are present. | |
44 | * The index in the array corresponds to the wlan interface number | |
45 | * (if "wlan*" is used). If "eth*" is used, the eth* numbers are allocated | |
46 | * after any Ethernet cards. | |
47 | * | |
48 | * The Arasan PCI-SDIO controller card supported by this driver has 2 slots, | |
49 | * hence a max of 2 devices. | |
50 | */ | |
51 | static unifi_priv_t *Unifi_instances[MAX_UNIFI_DEVS]; | |
52 | ||
53 | /* Array of pointers to netdev objects used by the UniFi driver, as there | |
54 | * are now many per instance. This is used to determine which netdev events | |
55 | * are for UniFi as opposed to other net interfaces. | |
56 | */ | |
57 | static netInterface_priv_t *Unifi_netdev_instances[MAX_UNIFI_DEVS * CSR_WIFI_NUM_INTERFACES]; | |
58 | ||
59 | /* | |
60 | * Array to hold the status of each unifi device in each slot. | |
61 | * We only process an insert event when In_use[] for the slot is | |
62 | * UNIFI_DEV_NOT_IN_USE. Otherwise, it means that the slot is in use or | |
63 | * we are in the middle of a cleanup (the action on unplug). | |
64 | */ | |
65 | #define UNIFI_DEV_NOT_IN_USE 0 | |
66 | #define UNIFI_DEV_IN_USE 1 | |
67 | #define UNIFI_DEV_CLEANUP 2 | |
68 | static int In_use[MAX_UNIFI_DEVS]; | |
69 | /* | |
70 | * Mutex to prevent UDI clients to open the character device before the priv | |
71 | * is created and initialised. | |
72 | */ | |
635d2b00 | 73 | DEFINE_SEMAPHORE(Unifi_instance_mutex); |
635d2b00 GKH |
74 | /* |
75 | * When the device is removed, unregister waits on Unifi_cleanup_wq | |
76 | * until all the UDI clients release the character device. | |
77 | */ | |
78 | DECLARE_WAIT_QUEUE_HEAD(Unifi_cleanup_wq); | |
79 | ||
294a08e4 DH |
80 | #ifdef CONFIG_PROC_FS |
81 | /* | |
82 | * seq_file wrappers for procfile show routines. | |
83 | */ | |
84 | static int uf_proc_show(struct seq_file *m, void *v); | |
85 | ||
86 | #define UNIFI_DEBUG_TXT_BUFFER (8 * 1024) | |
87 | ||
88 | static int uf_proc_open(struct inode *inode, struct file *file) | |
89 | { | |
90 | return single_open_size(file, uf_proc_show, PDE_DATA(inode), | |
91 | UNIFI_DEBUG_TXT_BUFFER); | |
92 | } | |
635d2b00 | 93 | |
294a08e4 DH |
94 | static const struct file_operations uf_proc_fops = { |
95 | .open = uf_proc_open, | |
96 | .read = seq_read, | |
97 | .llseek = seq_lseek, | |
bae301d3 | 98 | .release = single_release, |
294a08e4 DH |
99 | }; |
100 | ||
101 | #endif /* CONFIG_PROC_FS */ | |
635d2b00 GKH |
102 | |
103 | #ifdef CSR_WIFI_RX_PATH_SPLIT | |
104 | ||
105 | static CsrResult signal_buffer_init(unifi_priv_t * priv, int size) | |
106 | { | |
107 | int i; | |
635d2b00 GKH |
108 | |
109 | priv->rxSignalBuffer.writePointer = | |
110 | priv->rxSignalBuffer.readPointer = 0; | |
111 | priv->rxSignalBuffer.size = size; | |
112 | /* Allocating Memory for Signal primitive pointer */ | |
113 | for(i=0; i<size; i++) | |
114 | { | |
115 | priv->rxSignalBuffer.rx_buff[i].sig_len=0; | |
70128792 | 116 | priv->rxSignalBuffer.rx_buff[i].bufptr = kmalloc(UNIFI_PACKED_SIGBUF_SIZE, GFP_KERNEL); |
635d2b00 GKH |
117 | if (priv->rxSignalBuffer.rx_buff[i].bufptr == NULL) |
118 | { | |
119 | int j; | |
22d09a1b | 120 | unifi_error(priv, "signal_buffer_init:Failed to Allocate shared memory for T-H signals \n"); |
635d2b00 GKH |
121 | for(j=0;j<i;j++) |
122 | { | |
123 | priv->rxSignalBuffer.rx_buff[j].sig_len=0; | |
4fe9db37 | 124 | kfree(priv->rxSignalBuffer.rx_buff[j].bufptr); |
635d2b00 GKH |
125 | priv->rxSignalBuffer.rx_buff[j].bufptr = NULL; |
126 | } | |
635d2b00 GKH |
127 | return -1; |
128 | } | |
129 | } | |
635d2b00 GKH |
130 | return 0; |
131 | } | |
132 | ||
133 | ||
134 | static void signal_buffer_free(unifi_priv_t * priv, int size) | |
135 | { | |
136 | int i; | |
137 | ||
138 | for(i=0; i<size; i++) | |
139 | { | |
140 | priv->rxSignalBuffer.rx_buff[i].sig_len=0; | |
4fe9db37 | 141 | kfree(priv->rxSignalBuffer.rx_buff[i].bufptr); |
635d2b00 GKH |
142 | priv->rxSignalBuffer.rx_buff[i].bufptr = NULL; |
143 | } | |
144 | } | |
145 | #endif | |
146 | /* | |
147 | * --------------------------------------------------------------------------- | |
148 | * uf_register_netdev | |
149 | * | |
150 | * Registers the network interface, installes the qdisc, | |
151 | * and registers the inet handler. | |
152 | * In the porting exercise, register the driver to the network | |
153 | * stack if necessary. | |
154 | * | |
155 | * Arguments: | |
156 | * priv Pointer to driver context. | |
157 | * | |
158 | * Returns: | |
159 | * O on success, non-zero otherwise. | |
160 | * | |
161 | * Notes: | |
162 | * We will only unregister when the card is ejected, so we must | |
163 | * only do it once. | |
164 | * --------------------------------------------------------------------------- | |
165 | */ | |
166 | int | |
167 | uf_register_netdev(unifi_priv_t *priv, int interfaceTag) | |
168 | { | |
169 | int r; | |
170 | netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag]; | |
171 | ||
172 | if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) { | |
173 | unifi_error(priv, "uf_register_netdev bad interfaceTag\n"); | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Allocates a device number and registers device with the network | |
179 | * stack. | |
180 | */ | |
181 | unifi_trace(priv, UDBG5, "uf_register_netdev: netdev %d - 0x%p\n", | |
182 | interfaceTag, priv->netdev[interfaceTag]); | |
183 | r = register_netdev(priv->netdev[interfaceTag]); | |
184 | if (r) { | |
185 | unifi_error(priv, "Failed to register net device\n"); | |
186 | return -EINVAL; | |
187 | } | |
188 | ||
189 | /* The device is registed */ | |
190 | interfacePriv->netdev_registered = 1; | |
191 | ||
635d2b00 GKH |
192 | #ifdef CSR_SUPPORT_SME |
193 | /* | |
194 | * Register the inet handler; it notifies us for changes in the IP address. | |
195 | */ | |
196 | uf_register_inet_notifier(); | |
197 | #endif /* CSR_SUPPORT_SME */ | |
198 | ||
199 | unifi_notice(priv, "unifi%d is %s\n", | |
200 | priv->instance, priv->netdev[interfaceTag]->name); | |
201 | ||
202 | return 0; | |
203 | } /* uf_register_netdev */ | |
204 | ||
205 | ||
206 | /* | |
207 | * --------------------------------------------------------------------------- | |
208 | * uf_unregister_netdev | |
209 | * | |
210 | * Unregisters the network interface and the inet handler. | |
211 | * | |
212 | * Arguments: | |
213 | * priv Pointer to driver context. | |
214 | * | |
215 | * Returns: | |
216 | * None. | |
217 | * | |
218 | * --------------------------------------------------------------------------- | |
219 | */ | |
220 | void | |
221 | uf_unregister_netdev(unifi_priv_t *priv) | |
222 | { | |
223 | int i=0; | |
224 | ||
225 | #ifdef CSR_SUPPORT_SME | |
226 | /* Unregister the inet handler... */ | |
227 | uf_unregister_inet_notifier(); | |
228 | #endif /* CSR_SUPPORT_SME */ | |
229 | ||
230 | for (i=0; i<CSR_WIFI_NUM_INTERFACES; i++) { | |
231 | netInterface_priv_t *interfacePriv = priv->interfacePriv[i]; | |
232 | if (interfacePriv->netdev_registered) { | |
233 | unifi_trace(priv, UDBG5, | |
234 | "uf_unregister_netdev: netdev %d - 0x%p\n", | |
235 | i, priv->netdev[i]); | |
236 | ||
237 | /* ... and the netdev */ | |
238 | unregister_netdev(priv->netdev[i]); | |
239 | interfacePriv->netdev_registered = 0; | |
240 | } | |
241 | ||
242 | interfacePriv->interfaceMode = 0; | |
243 | ||
244 | /* Enable all queues by default */ | |
245 | interfacePriv->queueEnabled[0] = 1; | |
246 | interfacePriv->queueEnabled[1] = 1; | |
247 | interfacePriv->queueEnabled[2] = 1; | |
248 | interfacePriv->queueEnabled[3] = 1; | |
249 | } | |
250 | ||
251 | priv->totalInterfaceCount = 0; | |
252 | } /* uf_unregister_netdev() */ | |
253 | ||
254 | ||
255 | /* | |
256 | * --------------------------------------------------------------------------- | |
257 | * register_unifi_sdio | |
258 | * | |
259 | * This function is called from the Probe (or equivalent) method of | |
260 | * the SDIO driver when a UniFi card is detected. | |
261 | * We allocate the Linux net_device struct, initialise the HIP core | |
262 | * lib, create the char device nodes and start the userspace helper | |
263 | * to initialise the device. | |
264 | * | |
265 | * Arguments: | |
266 | * sdio_dev Pointer to SDIO context handle to use for all | |
267 | * SDIO ops. | |
268 | * bus_id A small number indicating the SDIO card position on the | |
269 | * bus. Typically this is the slot number, e.g. 0, 1 etc. | |
270 | * Valid values are 0 to MAX_UNIFI_DEVS-1. | |
271 | * dev Pointer to kernel device manager struct. | |
272 | * | |
273 | * Returns: | |
274 | * Pointer to the unifi instance, or NULL on error. | |
275 | * --------------------------------------------------------------------------- | |
276 | */ | |
277 | static unifi_priv_t * | |
278 | register_unifi_sdio(CsrSdioFunction *sdio_dev, int bus_id, struct device *dev) | |
279 | { | |
280 | unifi_priv_t *priv = NULL; | |
281 | int r = -1; | |
282 | CsrResult csrResult; | |
283 | ||
635d2b00 GKH |
284 | if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) { |
285 | unifi_error(priv, "register_unifi_sdio: invalid device %d\n", | |
286 | bus_id); | |
287 | return NULL; | |
288 | } | |
289 | ||
290 | down(&Unifi_instance_mutex); | |
291 | ||
292 | if (In_use[bus_id] != UNIFI_DEV_NOT_IN_USE) { | |
293 | unifi_error(priv, "register_unifi_sdio: device %d is already in use\n", | |
294 | bus_id); | |
295 | goto failed0; | |
296 | } | |
297 | ||
298 | ||
299 | /* Allocate device private and net_device structs */ | |
300 | priv = uf_alloc_netdevice(sdio_dev, bus_id); | |
301 | if (priv == NULL) { | |
302 | unifi_error(priv, "Failed to allocate driver private\n"); | |
303 | goto failed0; | |
304 | } | |
305 | ||
306 | priv->unifi_device = dev; | |
307 | ||
308 | SET_NETDEV_DEV(priv->netdev[0], dev); | |
309 | ||
310 | /* We are not ready to send data yet. */ | |
311 | netif_carrier_off(priv->netdev[0]); | |
312 | ||
313 | /* Allocate driver context. */ | |
314 | priv->card = unifi_alloc_card(priv->sdio, priv); | |
315 | if (priv->card == NULL) { | |
316 | unifi_error(priv, "Failed to allocate UniFi driver card struct.\n"); | |
317 | goto failed1; | |
318 | } | |
319 | ||
320 | if (Unifi_instances[bus_id]) { | |
321 | unifi_error(priv, "Internal error: instance for slot %d is already taken\n", | |
322 | bus_id); | |
323 | } | |
324 | Unifi_instances[bus_id] = priv; | |
325 | In_use[bus_id] = UNIFI_DEV_IN_USE; | |
326 | ||
327 | /* Save the netdev_priv for use by the netdev event callback mechanism */ | |
328 | Unifi_netdev_instances[bus_id * CSR_WIFI_NUM_INTERFACES] = netdev_priv(priv->netdev[0]); | |
329 | ||
330 | /* Initialise the mini-coredump capture buffers */ | |
8c87f69a | 331 | csrResult = unifi_coredump_init(priv->card, (u16)coredump_max); |
635d2b00 GKH |
332 | if (csrResult != CSR_RESULT_SUCCESS) { |
333 | unifi_error(priv, "Couldn't allocate mini-coredump buffers\n"); | |
334 | } | |
335 | ||
336 | /* Create the character device nodes */ | |
337 | r = uf_create_device_nodes(priv, bus_id); | |
338 | if (r) { | |
339 | goto failed1; | |
340 | } | |
341 | ||
342 | /* | |
343 | * We use the slot number as unifi device index. | |
344 | */ | |
c4f9e644 | 345 | scnprintf(priv->proc_entry_name, 64, "driver/unifi%d", priv->instance); |
635d2b00 GKH |
346 | /* |
347 | * The following complex casting is in place in order to eliminate 64-bit compilation warning | |
348 | * "cast to/from pointer from/to integer of different size" | |
349 | */ | |
294a08e4 DH |
350 | if (!proc_create_data(priv->proc_entry_name, 0, NULL, |
351 | &uf_proc_fops, (void *)(long)priv->instance)) | |
635d2b00 GKH |
352 | { |
353 | unifi_error(priv, "unifi: can't create /proc/driver/unifi\n"); | |
354 | } | |
355 | ||
356 | /* Allocate the net_device for interfaces other than 0. */ | |
357 | { | |
358 | int i; | |
359 | priv->totalInterfaceCount =0; | |
360 | ||
361 | for(i=1;i<CSR_WIFI_NUM_INTERFACES;i++) | |
362 | { | |
22d09a1b | 363 | if( !uf_alloc_netdevice_for_other_interfaces(priv, i) ) |
635d2b00 GKH |
364 | { |
365 | /* error occured while allocating the net_device for interface[i]. The net_device are | |
366 | * allocated for the interfaces with id<i. Dont worry, all the allocated net_device will | |
367 | * be releasing chen the control goes to the label failed0. | |
368 | */ | |
22d09a1b | 369 | unifi_error(priv, "Failed to allocate driver private for interface[%d]\n", i); |
635d2b00 GKH |
370 | goto failed0; |
371 | } | |
372 | else | |
373 | { | |
374 | SET_NETDEV_DEV(priv->netdev[i], dev); | |
375 | ||
376 | /* We are not ready to send data yet. */ | |
377 | netif_carrier_off(priv->netdev[i]); | |
378 | ||
379 | /* Save the netdev_priv for use by the netdev event callback mechanism */ | |
380 | Unifi_netdev_instances[bus_id * CSR_WIFI_NUM_INTERFACES + i] = netdev_priv(priv->netdev[i]); | |
381 | } | |
382 | } | |
383 | ||
384 | for(i=0;i<CSR_WIFI_NUM_INTERFACES;i++) | |
385 | { | |
386 | netInterface_priv_t *interfacePriv = priv->interfacePriv[i]; | |
387 | interfacePriv->netdev_registered=0; | |
388 | } | |
389 | } | |
390 | ||
391 | #ifdef CSR_WIFI_RX_PATH_SPLIT | |
392 | if (signal_buffer_init(priv, CSR_WIFI_RX_SIGNAL_BUFFER_SIZE)) | |
393 | { | |
22d09a1b | 394 | unifi_error(priv, "Failed to allocate shared memory for T-H signals\n"); |
635d2b00 GKH |
395 | goto failed2; |
396 | } | |
397 | priv->rx_workqueue = create_singlethread_workqueue("rx_workq"); | |
398 | if (priv->rx_workqueue == NULL) { | |
22d09a1b | 399 | unifi_error(priv, "create_singlethread_workqueue failed \n"); |
635d2b00 GKH |
400 | goto failed3; |
401 | } | |
402 | INIT_WORK(&priv->rx_work_struct, rx_wq_handler); | |
403 | #endif | |
404 | ||
95edd09e GKH |
405 | #ifdef CSR_WIFI_HIP_DEBUG_OFFLINE |
406 | if (log_hip_signals) | |
407 | { | |
408 | uf_register_hip_offline_debug(priv); | |
409 | } | |
410 | #endif | |
411 | ||
635d2b00 GKH |
412 | /* Initialise the SME related threads and parameters */ |
413 | r = uf_sme_init(priv); | |
414 | if (r) { | |
415 | unifi_error(priv, "SME initialisation failed.\n"); | |
416 | goto failed4; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Run the userspace helper program (unififw) to perform | |
421 | * the device initialisation. | |
422 | */ | |
423 | unifi_trace(priv, UDBG1, "run UniFi helper app...\n"); | |
424 | r = uf_run_unifihelper(priv); | |
425 | if (r) { | |
426 | unifi_notice(priv, "unable to run UniFi helper app\n"); | |
427 | /* Not a fatal error. */ | |
428 | } | |
429 | ||
430 | up(&Unifi_instance_mutex); | |
431 | ||
635d2b00 GKH |
432 | return priv; |
433 | ||
434 | failed4: | |
95edd09e GKH |
435 | #ifdef CSR_WIFI_HIP_DEBUG_OFFLINE |
436 | if (log_hip_signals) | |
437 | { | |
438 | uf_unregister_hip_offline_debug(priv); | |
439 | } | |
440 | #endif | |
635d2b00 GKH |
441 | #ifdef CSR_WIFI_RX_PATH_SPLIT |
442 | flush_workqueue(priv->rx_workqueue); | |
443 | destroy_workqueue(priv->rx_workqueue); | |
444 | failed3: | |
22d09a1b | 445 | signal_buffer_free(priv, CSR_WIFI_RX_SIGNAL_BUFFER_SIZE); |
635d2b00 GKH |
446 | failed2: |
447 | #endif | |
448 | /* Remove the device nodes */ | |
449 | uf_destroy_device_nodes(priv); | |
450 | failed1: | |
451 | /* Deregister priv->netdev_client */ | |
452 | ul_deregister_client(priv->netdev_client); | |
453 | ||
454 | failed0: | |
455 | if (priv && priv->card) { | |
456 | unifi_coredump_free(priv->card); | |
457 | unifi_free_card(priv->card); | |
458 | } | |
459 | if (priv) { | |
460 | uf_free_netdevice(priv); | |
461 | } | |
462 | ||
463 | up(&Unifi_instance_mutex); | |
464 | ||
635d2b00 GKH |
465 | return NULL; |
466 | } /* register_unifi_sdio() */ | |
467 | ||
468 | ||
469 | /* | |
470 | * --------------------------------------------------------------------------- | |
471 | * ask_unifi_sdio_cleanup | |
472 | * | |
473 | * We can not free our private context, until all the char device | |
474 | * clients have closed the file handles. unregister_unifi_sdio() which | |
475 | * is called when a card is removed, waits on Unifi_cleanup_wq until | |
476 | * the reference count becomes zero. It is time to wake it up now. | |
477 | * | |
478 | * Arguments: | |
479 | * priv Pointer to driver context. | |
480 | * | |
481 | * Returns: | |
482 | * None. | |
483 | * --------------------------------------------------------------------------- | |
484 | */ | |
485 | static void | |
486 | ask_unifi_sdio_cleanup(unifi_priv_t *priv) | |
487 | { | |
635d2b00 GKH |
488 | |
489 | /* | |
490 | * Now clear the flag that says the old instance is in use. | |
491 | * This is used to prevent a new instance being started before old | |
492 | * one has finshed closing down, for example if bounce makes the card | |
493 | * appear to be ejected and re-inserted quickly. | |
494 | */ | |
495 | In_use[priv->instance] = UNIFI_DEV_CLEANUP; | |
496 | ||
497 | unifi_trace(NULL, UDBG5, "ask_unifi_sdio_cleanup: wake up cleanup workqueue.\n"); | |
498 | wake_up(&Unifi_cleanup_wq); | |
499 | ||
635d2b00 GKH |
500 | } /* ask_unifi_sdio_cleanup() */ |
501 | ||
502 | ||
503 | /* | |
504 | * --------------------------------------------------------------------------- | |
505 | * cleanup_unifi_sdio | |
506 | * | |
507 | * Release any resources owned by a unifi instance. | |
508 | * | |
509 | * Arguments: | |
510 | * priv Pointer to the instance to free. | |
511 | * | |
512 | * Returns: | |
513 | * None. | |
514 | * --------------------------------------------------------------------------- | |
515 | */ | |
516 | static void | |
517 | cleanup_unifi_sdio(unifi_priv_t *priv) | |
518 | { | |
519 | int priv_instance; | |
520 | int i; | |
521 | static const CsrWifiMacAddress broadcast_address = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}}; | |
522 | ||
635d2b00 GKH |
523 | /* Remove the device nodes */ |
524 | uf_destroy_device_nodes(priv); | |
525 | ||
526 | /* Mark this device as gone away by NULLing the entry in Unifi_instances */ | |
527 | Unifi_instances[priv->instance] = NULL; | |
528 | ||
529 | unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: remove_proc_entry\n"); | |
530 | /* | |
531 | * Free the children of priv before unifi_free_netdevice() frees | |
532 | * the priv struct | |
533 | */ | |
534 | remove_proc_entry(priv->proc_entry_name, 0); | |
535 | ||
536 | ||
537 | /* Unregister netdev as a client. */ | |
538 | if (priv->netdev_client) { | |
539 | unifi_trace(priv, UDBG2, "Netdev client (id:%d s:0x%X) is unregistered\n", | |
540 | priv->netdev_client->client_id, priv->netdev_client->sender_id); | |
541 | ul_deregister_client(priv->netdev_client); | |
542 | } | |
543 | ||
544 | /* Destroy the SME related threads and parameters */ | |
545 | uf_sme_deinit(priv); | |
546 | ||
547 | #ifdef CSR_SME_USERSPACE | |
548 | priv->smepriv = NULL; | |
549 | #endif | |
550 | ||
95edd09e GKH |
551 | #ifdef CSR_WIFI_HIP_DEBUG_OFFLINE |
552 | if (log_hip_signals) | |
553 | { | |
554 | uf_unregister_hip_offline_debug(priv); | |
555 | } | |
556 | #endif | |
557 | ||
635d2b00 GKH |
558 | /* Free any packets left in the Rx queues */ |
559 | for(i=0;i<CSR_WIFI_NUM_INTERFACES;i++) | |
560 | { | |
22d09a1b LL |
561 | uf_free_pending_rx_packets(priv, UF_UNCONTROLLED_PORT_Q, broadcast_address, i); |
562 | uf_free_pending_rx_packets(priv, UF_CONTROLLED_PORT_Q, broadcast_address, i); | |
635d2b00 GKH |
563 | } |
564 | /* | |
565 | * We need to free the resources held by the core, which include tx skbs, | |
566 | * otherwise we can not call unregister_netdev(). | |
567 | */ | |
568 | if (priv->card) { | |
569 | unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: free card\n"); | |
570 | unifi_coredump_free(priv->card); | |
571 | unifi_free_card(priv->card); | |
572 | priv->card = NULL; | |
573 | } | |
574 | ||
575 | /* | |
576 | * Unregister the network device. | |
577 | * We can not unregister the netdev before we release | |
578 | * all pending packets in the core. | |
579 | */ | |
580 | uf_unregister_netdev(priv); | |
581 | priv->totalInterfaceCount = 0; | |
582 | ||
583 | /* Clear the table of registered netdev_priv's */ | |
584 | for (i = 0; i < CSR_WIFI_NUM_INTERFACES; i++) { | |
585 | Unifi_netdev_instances[priv->instance * CSR_WIFI_NUM_INTERFACES + i] = NULL; | |
586 | } | |
587 | ||
588 | unifi_trace(priv, UDBG5, "cleanup_unifi_sdio: uf_free_netdevice\n"); | |
589 | /* | |
590 | * When uf_free_netdevice() returns, the priv is invalid | |
591 | * so we need to remember the instance to clear the global flag later. | |
592 | */ | |
593 | priv_instance = priv->instance; | |
594 | ||
595 | #ifdef CSR_WIFI_RX_PATH_SPLIT | |
596 | flush_workqueue(priv->rx_workqueue); | |
597 | destroy_workqueue(priv->rx_workqueue); | |
22d09a1b | 598 | signal_buffer_free(priv, CSR_WIFI_RX_SIGNAL_BUFFER_SIZE); |
635d2b00 GKH |
599 | #endif |
600 | ||
601 | /* Priv is freed as part of the net_device */ | |
602 | uf_free_netdevice(priv); | |
603 | ||
604 | /* | |
605 | * Now clear the flag that says the old instance is in use. | |
606 | * This is used to prevent a new instance being started before old | |
607 | * one has finshed closing down, for example if bounce makes the card | |
608 | * appear to be ejected and re-inserted quickly. | |
609 | */ | |
610 | In_use[priv_instance] = UNIFI_DEV_NOT_IN_USE; | |
611 | ||
612 | unifi_trace(NULL, UDBG5, "cleanup_unifi_sdio: DONE.\n"); | |
613 | ||
635d2b00 GKH |
614 | } /* cleanup_unifi_sdio() */ |
615 | ||
616 | ||
617 | /* | |
618 | * --------------------------------------------------------------------------- | |
619 | * unregister_unifi_sdio | |
620 | * | |
621 | * Call from SDIO driver when it detects that UniFi has been removed. | |
622 | * | |
623 | * Arguments: | |
624 | * bus_id Number of the card that was ejected. | |
625 | * | |
626 | * Returns: | |
627 | * None. | |
628 | * --------------------------------------------------------------------------- | |
629 | */ | |
630 | static void | |
631 | unregister_unifi_sdio(int bus_id) | |
632 | { | |
633 | unifi_priv_t *priv; | |
634 | int interfaceTag=0; | |
635 | u8 reason = CONFIG_IND_EXIT; | |
636 | ||
637 | if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) { | |
638 | unifi_error(NULL, "unregister_unifi_sdio: invalid device %d\n", | |
639 | bus_id); | |
640 | return; | |
641 | } | |
642 | ||
643 | priv = Unifi_instances[bus_id]; | |
644 | if (priv == NULL) { | |
645 | unifi_error(priv, "unregister_unifi_sdio: device %d is not registered\n", | |
646 | bus_id); | |
635d2b00 GKH |
647 | return; |
648 | } | |
649 | ||
650 | /* Stop the network traffic before freeing the core. */ | |
651 | for(interfaceTag=0;interfaceTag<priv->totalInterfaceCount;interfaceTag++) | |
652 | { | |
653 | netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag]; | |
654 | if(interfacePriv->netdev_registered) | |
655 | { | |
656 | netif_carrier_off(priv->netdev[interfaceTag]); | |
4febd649 | 657 | netif_tx_stop_all_queues(priv->netdev[interfaceTag]); |
635d2b00 GKH |
658 | } |
659 | } | |
660 | ||
661 | #ifdef CSR_NATIVE_LINUX | |
662 | /* | |
663 | * If the unifi thread was started, signal it to stop. This | |
664 | * should cause any userspace processes with open unifi device to | |
665 | * close them. | |
666 | */ | |
667 | uf_stop_thread(priv, &priv->bh_thread); | |
668 | ||
669 | /* Unregister the interrupt handler */ | |
670 | if (csr_sdio_linux_remove_irq(priv->sdio)) { | |
671 | unifi_notice(priv, | |
672 | "csr_sdio_linux_remove_irq failed to talk to card.\n"); | |
673 | } | |
674 | ||
675 | /* Ensure no MLME functions are waiting on a the mlme_event semaphore. */ | |
676 | uf_abort_mlme(priv); | |
677 | #endif /* CSR_NATIVE_LINUX */ | |
678 | ||
679 | ul_log_config_ind(priv, &reason, sizeof(u8)); | |
680 | ||
681 | /* Deregister the UDI hook from the core. */ | |
682 | unifi_remove_udi_hook(priv->card, logging_handler); | |
683 | ||
684 | uf_put_instance(bus_id); | |
685 | ||
686 | /* | |
687 | * Wait until the device is cleaned up. i.e., when all userspace | |
688 | * processes have closed any open unifi devices. | |
689 | */ | |
690 | wait_event(Unifi_cleanup_wq, In_use[bus_id] == UNIFI_DEV_CLEANUP); | |
691 | unifi_trace(NULL, UDBG5, "Received clean up event\n"); | |
692 | ||
693 | /* Now we can free the private context and the char device nodes */ | |
694 | cleanup_unifi_sdio(priv); | |
695 | ||
696 | } /* unregister_unifi_sdio() */ | |
697 | ||
698 | ||
699 | /* | |
700 | * --------------------------------------------------------------------------- | |
701 | * uf_find_instance | |
702 | * | |
703 | * Find the context structure for a given UniFi device instance. | |
704 | * | |
705 | * Arguments: | |
706 | * inst The instance number to look for. | |
707 | * | |
708 | * Returns: | |
709 | * None. | |
710 | * --------------------------------------------------------------------------- | |
711 | */ | |
712 | unifi_priv_t * | |
713 | uf_find_instance(int inst) | |
714 | { | |
715 | if ((inst < 0) || (inst >= MAX_UNIFI_DEVS)) { | |
716 | return NULL; | |
717 | } | |
718 | return Unifi_instances[inst]; | |
719 | } /* uf_find_instance() */ | |
720 | ||
721 | ||
722 | /* | |
723 | * --------------------------------------------------------------------------- | |
724 | * uf_find_priv | |
725 | * | |
726 | * Find the device instance for a given context structure. | |
727 | * | |
728 | * Arguments: | |
729 | * priv The context structure pointer to look for. | |
730 | * | |
731 | * Returns: | |
732 | * index of instance, -1 otherwise. | |
733 | * --------------------------------------------------------------------------- | |
734 | */ | |
735 | int | |
736 | uf_find_priv(unifi_priv_t *priv) | |
737 | { | |
738 | int inst; | |
739 | ||
740 | if (!priv) { | |
741 | return -1; | |
742 | } | |
743 | ||
744 | for (inst = 0; inst < MAX_UNIFI_DEVS; inst++) { | |
745 | if (Unifi_instances[inst] == priv) { | |
746 | return inst; | |
747 | } | |
748 | } | |
749 | ||
750 | return -1; | |
751 | } /* uf_find_priv() */ | |
752 | ||
753 | /* | |
754 | * --------------------------------------------------------------------------- | |
755 | * uf_find_netdev_priv | |
756 | * | |
757 | * Find the device instance for a given netdev context structure. | |
758 | * | |
759 | * Arguments: | |
760 | * priv The context structure pointer to look for. | |
761 | * | |
762 | * Returns: | |
763 | * index of instance, -1 otherwise. | |
764 | * --------------------------------------------------------------------------- | |
765 | */ | |
766 | int | |
767 | uf_find_netdev_priv(netInterface_priv_t *priv) | |
768 | { | |
769 | int inst; | |
770 | ||
771 | if (!priv) { | |
772 | return -1; | |
773 | } | |
774 | ||
775 | for (inst = 0; inst < MAX_UNIFI_DEVS * CSR_WIFI_NUM_INTERFACES; inst++) { | |
776 | if (Unifi_netdev_instances[inst] == priv) { | |
777 | return inst; | |
778 | } | |
779 | } | |
780 | ||
781 | return -1; | |
782 | } /* uf_find_netdev_priv() */ | |
783 | ||
784 | /* | |
785 | * --------------------------------------------------------------------------- | |
786 | * uf_get_instance | |
787 | * | |
788 | * Find the context structure for a given UniFi device instance | |
789 | * and increment the reference count. | |
790 | * | |
791 | * Arguments: | |
792 | * inst The instance number to look for. | |
793 | * | |
794 | * Returns: | |
795 | * Pointer to the instance or NULL if no instance exists. | |
796 | * --------------------------------------------------------------------------- | |
797 | */ | |
798 | unifi_priv_t * | |
799 | uf_get_instance(int inst) | |
800 | { | |
801 | unifi_priv_t *priv; | |
802 | ||
803 | down(&Unifi_instance_mutex); | |
804 | ||
805 | priv = uf_find_instance(inst); | |
806 | if (priv) { | |
807 | priv->ref_count++; | |
808 | } | |
809 | ||
810 | up(&Unifi_instance_mutex); | |
811 | ||
812 | return priv; | |
813 | } | |
814 | ||
815 | /* | |
816 | * --------------------------------------------------------------------------- | |
817 | * uf_put_instance | |
818 | * | |
819 | * Decrement the context reference count, freeing resources and | |
820 | * shutting down the driver when the count reaches zero. | |
821 | * | |
822 | * Arguments: | |
823 | * inst The instance number to look for. | |
824 | * | |
825 | * Returns: | |
826 | * Pointer to the instance or NULL if no instance exists. | |
827 | * --------------------------------------------------------------------------- | |
828 | */ | |
829 | void | |
830 | uf_put_instance(int inst) | |
831 | { | |
832 | unifi_priv_t *priv; | |
833 | ||
834 | down(&Unifi_instance_mutex); | |
835 | ||
836 | priv = uf_find_instance(inst); | |
837 | if (priv) { | |
838 | priv->ref_count--; | |
839 | if (priv->ref_count == 0) { | |
840 | ask_unifi_sdio_cleanup(priv); | |
841 | } | |
842 | } | |
843 | ||
844 | up(&Unifi_instance_mutex); | |
845 | } | |
846 | ||
847 | ||
848 | /* | |
849 | * --------------------------------------------------------------------------- | |
294a08e4 | 850 | * uf_proc_show |
635d2b00 GKH |
851 | * |
852 | * Read method for driver node in /proc/driver/unifi0 | |
853 | * | |
854 | * Arguments: | |
855 | * page | |
856 | * start | |
857 | * offset | |
858 | * count | |
859 | * eof | |
860 | * data | |
861 | * | |
862 | * Returns: | |
863 | * None. | |
864 | * --------------------------------------------------------------------------- | |
865 | */ | |
866 | #ifdef CONFIG_PROC_FS | |
294a08e4 | 867 | static int uf_proc_show(struct seq_file *m, void *v) |
635d2b00 | 868 | { |
294a08e4 DH |
869 | unifi_priv_t *priv; |
870 | int i; | |
871 | ||
872 | /* | |
873 | * The following complex casting is in place in order to eliminate | |
874 | * 64-bit compilation warning "cast to/from pointer from/to integer of | |
875 | * different size" | |
876 | */ | |
877 | priv = uf_find_instance((long)m->private); | |
878 | if (!priv) | |
879 | return 0; | |
880 | ||
881 | seq_printf(m, "UniFi SDIO Driver: %s %s %s\n", | |
882 | CSR_WIFI_VERSION, __DATE__, __TIME__); | |
635d2b00 | 883 | #ifdef CSR_SME_USERSPACE |
294a08e4 | 884 | seq_puts(m, "SME: CSR userspace "); |
635d2b00 | 885 | #ifdef CSR_SUPPORT_WEXT |
294a08e4 | 886 | seq_puts(m, "with WEXT support\n"); |
635d2b00 | 887 | #else |
294a08e4 | 888 | seq_putc(m, '\n'); |
635d2b00 | 889 | #endif /* CSR_SUPPORT_WEXT */ |
635d2b00 GKH |
890 | #endif /* CSR_SME_USERSPACE */ |
891 | #ifdef CSR_NATIVE_LINUX | |
294a08e4 | 892 | seq_puts(m, "SME: native\n"); |
635d2b00 GKH |
893 | #endif |
894 | ||
895 | #ifdef CSR_SUPPORT_SME | |
294a08e4 DH |
896 | seq_printf(m, "Firmware (ROM) build:%u, Patch:%u\n", |
897 | priv->card_info.fw_build, | |
898 | priv->sme_versions.firmwarePatch); | |
635d2b00 | 899 | #endif |
635d2b00 | 900 | |
294a08e4 | 901 | unifi_print_status(priv->card, m); |
635d2b00 | 902 | |
294a08e4 | 903 | seq_printf(m, "Last dbg str: %s\n", priv->last_debug_string); |
635d2b00 | 904 | |
294a08e4 DH |
905 | seq_puts(m, "Last dbg16:"); |
906 | for (i = 0; i < 8; i++) | |
907 | seq_printf(m, " %04X", priv->last_debug_word16[i]); | |
908 | seq_putc(m, '\n'); | |
909 | seq_puts(m, " "); | |
910 | for (; i < 16; i++) | |
911 | seq_printf(m, " %04X", priv->last_debug_word16[i]); | |
912 | seq_putc(m, '\n'); | |
913 | return 0; | |
914 | } | |
635d2b00 GKH |
915 | #endif |
916 | ||
917 | ||
918 | ||
919 | ||
920 | static void | |
921 | uf_lx_suspend(CsrSdioFunction *sdio_ctx) | |
922 | { | |
923 | unifi_priv_t *priv = sdio_ctx->driverData; | |
924 | unifi_suspend(priv); | |
925 | ||
926 | CsrSdioSuspendAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS); | |
927 | } | |
928 | ||
929 | static void | |
930 | uf_lx_resume(CsrSdioFunction *sdio_ctx) | |
931 | { | |
932 | unifi_priv_t *priv = sdio_ctx->driverData; | |
933 | unifi_resume(priv); | |
934 | ||
935 | CsrSdioResumeAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS); | |
936 | } | |
937 | ||
938 | static int active_slot = MAX_UNIFI_DEVS; | |
939 | static struct device *os_devices[MAX_UNIFI_DEVS]; | |
940 | ||
941 | void | |
942 | uf_add_os_device(int bus_id, struct device *os_device) | |
943 | { | |
944 | if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) { | |
945 | unifi_error(NULL, "uf_add_os_device: invalid device %d\n", | |
946 | bus_id); | |
947 | return; | |
948 | } | |
949 | ||
950 | active_slot = bus_id; | |
951 | os_devices[bus_id] = os_device; | |
952 | } /* uf_add_os_device() */ | |
953 | ||
954 | void | |
955 | uf_remove_os_device(int bus_id) | |
956 | { | |
957 | if ((bus_id < 0) || (bus_id >= MAX_UNIFI_DEVS)) { | |
958 | unifi_error(NULL, "uf_remove_os_device: invalid device %d\n", | |
959 | bus_id); | |
960 | return; | |
961 | } | |
962 | ||
963 | active_slot = bus_id; | |
964 | os_devices[bus_id] = NULL; | |
965 | } /* uf_remove_os_device() */ | |
966 | ||
967 | static void | |
968 | uf_sdio_inserted(CsrSdioFunction *sdio_ctx) | |
969 | { | |
f145b4f4 | 970 | unifi_priv_t *priv; |
635d2b00 | 971 | |
f145b4f4 DN |
972 | unifi_trace(NULL, UDBG5, "uf_sdio_inserted(0x%p), slot_id=%d, dev=%p\n", |
973 | sdio_ctx, active_slot, os_devices[active_slot]); | |
635d2b00 | 974 | |
f145b4f4 DN |
975 | priv = register_unifi_sdio(sdio_ctx, active_slot, os_devices[active_slot]); |
976 | if (priv == NULL) { | |
977 | CsrSdioInsertedAcknowledge(sdio_ctx, CSR_RESULT_FAILURE); | |
978 | return; | |
979 | } | |
635d2b00 | 980 | |
f145b4f4 | 981 | sdio_ctx->driverData = priv; |
635d2b00 | 982 | |
f145b4f4 | 983 | CsrSdioInsertedAcknowledge(sdio_ctx, CSR_RESULT_SUCCESS); |
635d2b00 GKH |
984 | } /* uf_sdio_inserted() */ |
985 | ||
986 | ||
987 | static void | |
988 | uf_sdio_removed(CsrSdioFunction *sdio_ctx) | |
989 | { | |
f145b4f4 DN |
990 | unregister_unifi_sdio(active_slot); |
991 | CsrSdioRemovedAcknowledge(sdio_ctx); | |
635d2b00 GKH |
992 | } /* uf_sdio_removed() */ |
993 | ||
994 | ||
995 | static void | |
996 | uf_sdio_dsr_handler(CsrSdioFunction *sdio_ctx) | |
997 | { | |
f145b4f4 | 998 | unifi_priv_t *priv = sdio_ctx->driverData; |
635d2b00 | 999 | |
f145b4f4 | 1000 | unifi_sdio_interrupt_handler(priv->card); |
635d2b00 GKH |
1001 | } /* uf_sdio_dsr_handler() */ |
1002 | ||
1003 | /* | |
1004 | * --------------------------------------------------------------------------- | |
1005 | * uf_sdio_int_handler | |
1006 | * | |
1007 | * Interrupt callback function for SDIO interrupts. | |
1008 | * This is called in kernel context (i.e. not interrupt context). | |
1009 | * We retrieve the unifi context pointer and call the main UniFi | |
1010 | * interrupt handler. | |
1011 | * | |
1012 | * Arguments: | |
1013 | * fdev SDIO context pointer | |
1014 | * | |
1015 | * Returns: | |
1016 | * None. | |
1017 | * --------------------------------------------------------------------------- | |
1018 | */ | |
1019 | static CsrSdioInterruptDsrCallback | |
1020 | uf_sdio_int_handler(CsrSdioFunction *sdio_ctx) | |
1021 | { | |
f145b4f4 | 1022 | return uf_sdio_dsr_handler; |
635d2b00 GKH |
1023 | } /* uf_sdio_int_handler() */ |
1024 | ||
1025 | ||
1026 | ||
1027 | ||
1028 | static CsrSdioFunctionId unifi_ids[] = | |
1029 | { | |
f145b4f4 DN |
1030 | { |
1031 | .manfId = SDIO_MANF_ID_CSR, | |
1032 | .cardId = SDIO_CARD_ID_UNIFI_3, | |
1033 | .sdioFunction = SDIO_WLAN_FUNC_ID_UNIFI_3, | |
1034 | .sdioInterface = CSR_SDIO_ANY_SDIO_INTERFACE, | |
1035 | }, | |
1036 | { | |
1037 | .manfId = SDIO_MANF_ID_CSR, | |
1038 | .cardId = SDIO_CARD_ID_UNIFI_4, | |
1039 | .sdioFunction = SDIO_WLAN_FUNC_ID_UNIFI_4, | |
1040 | .sdioInterface = CSR_SDIO_ANY_SDIO_INTERFACE, | |
1041 | } | |
635d2b00 GKH |
1042 | }; |
1043 | ||
1044 | ||
1045 | /* | |
1046 | * Structure to register with the glue layer. | |
1047 | */ | |
1048 | static CsrSdioFunctionDriver unifi_sdioFunction_drv = | |
1049 | { | |
f145b4f4 DN |
1050 | .inserted = uf_sdio_inserted, |
1051 | .removed = uf_sdio_removed, | |
1052 | .intr = uf_sdio_int_handler, | |
1053 | .suspend = uf_lx_suspend, | |
1054 | .resume = uf_lx_resume, | |
1055 | ||
1056 | .ids = unifi_ids, | |
1057 | .idsCount = sizeof(unifi_ids) / sizeof(unifi_ids[0]) | |
635d2b00 GKH |
1058 | }; |
1059 | ||
1060 | ||
1061 | /* | |
1062 | * --------------------------------------------------------------------------- | |
1063 | * uf_sdio_load | |
1064 | * uf_sdio_unload | |
1065 | * | |
1066 | * These functions are called from the main module load and unload | |
1067 | * functions. They perform the appropriate operations for the monolithic | |
1068 | * driver. | |
1069 | * | |
1070 | * Arguments: | |
1071 | * None. | |
1072 | * | |
1073 | * Returns: | |
1074 | * None. | |
1075 | * --------------------------------------------------------------------------- | |
1076 | */ | |
1077 | int __init | |
1078 | uf_sdio_load(void) | |
1079 | { | |
f145b4f4 | 1080 | CsrResult csrResult; |
635d2b00 | 1081 | |
f145b4f4 DN |
1082 | csrResult = CsrSdioFunctionDriverRegister(&unifi_sdioFunction_drv); |
1083 | if (csrResult != CSR_RESULT_SUCCESS) { | |
1084 | unifi_error(NULL, "Failed to register UniFi SDIO driver: csrResult=%d\n", csrResult); | |
1085 | return -EIO; | |
1086 | } | |
635d2b00 | 1087 | |
f145b4f4 | 1088 | return 0; |
635d2b00 GKH |
1089 | } /* uf_sdio_load() */ |
1090 | ||
1091 | ||
1092 | ||
1093 | void __exit | |
1094 | uf_sdio_unload(void) | |
1095 | { | |
f145b4f4 | 1096 | CsrSdioFunctionDriverUnregister(&unifi_sdioFunction_drv); |
635d2b00 GKH |
1097 | } /* uf_sdio_unload() */ |
1098 |