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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
394b701c MP |
2 | /* |
3 | * RapidIO interconnect services | |
4 | * (RapidIO Interconnect Specification, http://www.rapidio.org) | |
5 | * | |
6 | * Copyright 2005 MontaVista Software, Inc. | |
7 | * Matt Porter <mporter@kernel.crashing.org> | |
8 | * | |
fdf90abc | 9 | * Copyright 2009 - 2013 Integrated Device Technology, Inc. |
e5cabeb3 | 10 | * Alex Bounine <alexandre.bounine@idt.com> |
394b701c MP |
11 | */ |
12 | ||
394b701c MP |
13 | #include <linux/types.h> |
14 | #include <linux/kernel.h> | |
15 | ||
16 | #include <linux/delay.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/rio.h> | |
19 | #include <linux/rio_drv.h> | |
20 | #include <linux/rio_ids.h> | |
21 | #include <linux/rio_regs.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/spinlock.h> | |
de25968c | 24 | #include <linux/slab.h> |
5febf1cd | 25 | #include <linux/interrupt.h> |
394b701c MP |
26 | |
27 | #include "rio.h" | |
28 | ||
9a0b0627 AB |
29 | /* |
30 | * struct rio_pwrite - RIO portwrite event | |
31 | * @node: Node in list of doorbell events | |
32 | * @pwcback: Doorbell event callback | |
33 | * @context: Handler specific context to pass on event | |
34 | */ | |
35 | struct rio_pwrite { | |
36 | struct list_head node; | |
37 | ||
38 | int (*pwcback)(struct rio_mport *mport, void *context, | |
39 | union rio_pw_msg *msg, int step); | |
40 | void *context; | |
41 | }; | |
42 | ||
fdf90abc AB |
43 | MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
44 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); | |
45 | MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | static int hdid[RIO_MAX_MPORTS]; | |
49 | static int ids_num; | |
50 | module_param_array(hdid, int, &ids_num, 0); | |
51 | MODULE_PARM_DESC(hdid, | |
52 | "Destination ID assignment to local RapidIO controllers"); | |
53 | ||
a11650e1 | 54 | static LIST_HEAD(rio_devices); |
e6b585ca | 55 | static LIST_HEAD(rio_nets); |
a11650e1 AB |
56 | static DEFINE_SPINLOCK(rio_global_list_lock); |
57 | ||
394b701c | 58 | static LIST_HEAD(rio_mports); |
9edbc30b | 59 | static LIST_HEAD(rio_scans); |
a11650e1 | 60 | static DEFINE_MUTEX(rio_mport_list_lock); |
569fccb6 | 61 | static unsigned char next_portid; |
da1589f0 | 62 | static DEFINE_SPINLOCK(rio_mmap_lock); |
394b701c MP |
63 | |
64 | /** | |
65 | * rio_local_get_device_id - Get the base/extended device id for a port | |
66 | * @port: RIO master port from which to get the deviceid | |
67 | * | |
68 | * Reads the base/extended device id from the local device | |
69 | * implementing the master port. Returns the 8/16-bit device | |
70 | * id. | |
71 | */ | |
72 | u16 rio_local_get_device_id(struct rio_mport *port) | |
73 | { | |
74 | u32 result; | |
75 | ||
76 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
77 | ||
e0423236 | 78 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c | 79 | } |
4ba61eca | 80 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); |
394b701c | 81 | |
8b189fdb AB |
82 | /** |
83 | * rio_query_mport - Query mport device attributes | |
84 | * @port: mport device to query | |
85 | * @mport_attr: mport attributes data structure | |
86 | * | |
87 | * Returns attributes of specified mport through the | |
88 | * pointer to attributes data structure. | |
89 | */ | |
90 | int rio_query_mport(struct rio_mport *port, | |
91 | struct rio_mport_attr *mport_attr) | |
92 | { | |
93 | if (!port->ops->query_mport) | |
94 | return -ENODATA; | |
95 | return port->ops->query_mport(port, mport_attr); | |
96 | } | |
97 | EXPORT_SYMBOL(rio_query_mport); | |
98 | ||
e6b585ca AB |
99 | /** |
100 | * rio_alloc_net- Allocate and initialize a new RIO network data structure | |
101 | * @mport: Master port associated with the RIO network | |
102 | * | |
103 | * Allocates a RIO network structure, initializes per-network | |
104 | * list heads, and adds the associated master port to the | |
105 | * network list of associated master ports. Returns a | |
106 | * RIO network pointer on success or %NULL on failure. | |
107 | */ | |
108 | struct rio_net *rio_alloc_net(struct rio_mport *mport) | |
109 | { | |
d1509c09 | 110 | struct rio_net *net = kzalloc(sizeof(*net), GFP_KERNEL); |
e6b585ca | 111 | |
e6b585ca AB |
112 | if (net) { |
113 | INIT_LIST_HEAD(&net->node); | |
114 | INIT_LIST_HEAD(&net->devices); | |
115 | INIT_LIST_HEAD(&net->switches); | |
116 | INIT_LIST_HEAD(&net->mports); | |
117 | mport->net = net; | |
118 | } | |
119 | return net; | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(rio_alloc_net); | |
122 | ||
123 | int rio_add_net(struct rio_net *net) | |
124 | { | |
125 | int err; | |
126 | ||
127 | err = device_register(&net->dev); | |
128 | if (err) | |
129 | return err; | |
130 | spin_lock(&rio_global_list_lock); | |
131 | list_add_tail(&net->node, &rio_nets); | |
132 | spin_unlock(&rio_global_list_lock); | |
133 | ||
134 | return 0; | |
135 | } | |
136 | EXPORT_SYMBOL_GPL(rio_add_net); | |
137 | ||
138 | void rio_free_net(struct rio_net *net) | |
139 | { | |
140 | spin_lock(&rio_global_list_lock); | |
141 | if (!list_empty(&net->node)) | |
142 | list_del(&net->node); | |
143 | spin_unlock(&rio_global_list_lock); | |
144 | if (net->release) | |
145 | net->release(net); | |
146 | device_unregister(&net->dev); | |
147 | } | |
148 | EXPORT_SYMBOL_GPL(rio_free_net); | |
149 | ||
5024622f AB |
150 | /** |
151 | * rio_local_set_device_id - Set the base/extended device id for a port | |
152 | * @port: RIO master port | |
153 | * @did: Device ID value to be written | |
154 | * | |
155 | * Writes the base/extended device id from a device. | |
156 | */ | |
157 | void rio_local_set_device_id(struct rio_mport *port, u16 did) | |
158 | { | |
159 | rio_local_write_config_32(port, RIO_DID_CSR, | |
160 | RIO_SET_DID(port->sys_size, did)); | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(rio_local_set_device_id); | |
163 | ||
a11650e1 AB |
164 | /** |
165 | * rio_add_device- Adds a RIO device to the device model | |
166 | * @rdev: RIO device | |
167 | * | |
168 | * Adds the RIO device to the global device list and adds the RIO | |
169 | * device to the RIO device list. Creates the generic sysfs nodes | |
170 | * for an RIO device. | |
171 | */ | |
172 | int rio_add_device(struct rio_dev *rdev) | |
173 | { | |
174 | int err; | |
175 | ||
b77a2030 | 176 | atomic_set(&rdev->state, RIO_DEVICE_RUNNING); |
b74ec56e | 177 | err = device_register(&rdev->dev); |
a11650e1 AB |
178 | if (err) |
179 | return err; | |
180 | ||
181 | spin_lock(&rio_global_list_lock); | |
182 | list_add_tail(&rdev->global_list, &rio_devices); | |
b74ec56e AB |
183 | if (rdev->net) { |
184 | list_add_tail(&rdev->net_list, &rdev->net->devices); | |
185 | if (rdev->pef & RIO_PEF_SWITCH) | |
186 | list_add_tail(&rdev->rswitch->node, | |
187 | &rdev->net->switches); | |
188 | } | |
a11650e1 AB |
189 | spin_unlock(&rio_global_list_lock); |
190 | ||
a11650e1 AB |
191 | return 0; |
192 | } | |
193 | EXPORT_SYMBOL_GPL(rio_add_device); | |
194 | ||
b74ec56e AB |
195 | /* |
196 | * rio_del_device - removes a RIO device from the device model | |
197 | * @rdev: RIO device | |
b77a2030 | 198 | * @state: device state to set during removal process |
b74ec56e AB |
199 | * |
200 | * Removes the RIO device to the kernel device list and subsystem's device list. | |
201 | * Clears sysfs entries for the removed device. | |
202 | */ | |
b77a2030 | 203 | void rio_del_device(struct rio_dev *rdev, enum rio_device_state state) |
b74ec56e AB |
204 | { |
205 | pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev)); | |
b77a2030 | 206 | atomic_set(&rdev->state, state); |
b74ec56e AB |
207 | spin_lock(&rio_global_list_lock); |
208 | list_del(&rdev->global_list); | |
209 | if (rdev->net) { | |
210 | list_del(&rdev->net_list); | |
211 | if (rdev->pef & RIO_PEF_SWITCH) { | |
212 | list_del(&rdev->rswitch->node); | |
213 | kfree(rdev->rswitch->route_table); | |
214 | } | |
215 | } | |
216 | spin_unlock(&rio_global_list_lock); | |
b74ec56e AB |
217 | device_unregister(&rdev->dev); |
218 | } | |
219 | EXPORT_SYMBOL_GPL(rio_del_device); | |
220 | ||
394b701c MP |
221 | /** |
222 | * rio_request_inb_mbox - request inbound mailbox service | |
223 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 224 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
225 | * @mbox: Mailbox number to claim |
226 | * @entries: Number of entries in inbound mailbox queue | |
227 | * @minb: Callback to execute when inbound message is received | |
228 | * | |
229 | * Requests ownership of an inbound mailbox resource and binds | |
230 | * a callback function to the resource. Returns %0 on success. | |
231 | */ | |
232 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 233 | void *dev_id, |
394b701c MP |
234 | int mbox, |
235 | int entries, | |
6978bbc0 | 236 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
237 | int slot)) |
238 | { | |
f8f06269 AB |
239 | int rc = -ENOSYS; |
240 | struct resource *res; | |
394b701c | 241 | |
93dd49af | 242 | if (!mport->ops->open_inb_mbox) |
f8f06269 AB |
243 | goto out; |
244 | ||
d1509c09 | 245 | res = kzalloc(sizeof(*res), GFP_KERNEL); |
394b701c MP |
246 | if (res) { |
247 | rio_init_mbox_res(res, mbox, mbox); | |
248 | ||
249 | /* Make sure this mailbox isn't in use */ | |
e1d66d04 ME |
250 | rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], |
251 | res); | |
252 | if (rc < 0) { | |
394b701c MP |
253 | kfree(res); |
254 | goto out; | |
255 | } | |
256 | ||
257 | mport->inb_msg[mbox].res = res; | |
258 | ||
259 | /* Hook the inbound message callback */ | |
260 | mport->inb_msg[mbox].mcback = minb; | |
261 | ||
f8f06269 | 262 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
06e1b249 AB |
263 | if (rc) { |
264 | mport->inb_msg[mbox].mcback = NULL; | |
265 | mport->inb_msg[mbox].res = NULL; | |
266 | release_resource(res); | |
267 | kfree(res); | |
268 | } | |
394b701c MP |
269 | } else |
270 | rc = -ENOMEM; | |
271 | ||
272 | out: | |
273 | return rc; | |
274 | } | |
4ba61eca | 275 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); |
394b701c MP |
276 | |
277 | /** | |
278 | * rio_release_inb_mbox - release inbound mailbox message service | |
279 | * @mport: RIO master port from which to release the mailbox resource | |
280 | * @mbox: Mailbox number to release | |
281 | * | |
282 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
283 | * if the request has been satisfied. | |
284 | */ | |
285 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
286 | { | |
06e1b249 | 287 | int rc; |
394b701c | 288 | |
06e1b249 AB |
289 | if (!mport->ops->close_inb_mbox || !mport->inb_msg[mbox].res) |
290 | return -EINVAL; | |
291 | ||
292 | mport->ops->close_inb_mbox(mport, mbox); | |
293 | mport->inb_msg[mbox].mcback = NULL; | |
294 | ||
295 | rc = release_resource(mport->inb_msg[mbox].res); | |
296 | if (rc) | |
297 | return rc; | |
298 | ||
299 | kfree(mport->inb_msg[mbox].res); | |
300 | mport->inb_msg[mbox].res = NULL; | |
301 | ||
302 | return 0; | |
394b701c | 303 | } |
4ba61eca | 304 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); |
394b701c MP |
305 | |
306 | /** | |
307 | * rio_request_outb_mbox - request outbound mailbox service | |
308 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 309 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
310 | * @mbox: Mailbox number to claim |
311 | * @entries: Number of entries in outbound mailbox queue | |
312 | * @moutb: Callback to execute when outbound message is sent | |
313 | * | |
314 | * Requests ownership of an outbound mailbox resource and binds | |
315 | * a callback function to the resource. Returns 0 on success. | |
316 | */ | |
317 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 318 | void *dev_id, |
394b701c MP |
319 | int mbox, |
320 | int entries, | |
6978bbc0 | 321 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 322 | { |
f8f06269 AB |
323 | int rc = -ENOSYS; |
324 | struct resource *res; | |
394b701c | 325 | |
93dd49af | 326 | if (!mport->ops->open_outb_mbox) |
f8f06269 AB |
327 | goto out; |
328 | ||
d1509c09 | 329 | res = kzalloc(sizeof(*res), GFP_KERNEL); |
394b701c MP |
330 | if (res) { |
331 | rio_init_mbox_res(res, mbox, mbox); | |
332 | ||
333 | /* Make sure this outbound mailbox isn't in use */ | |
e1d66d04 ME |
334 | rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], |
335 | res); | |
336 | if (rc < 0) { | |
394b701c MP |
337 | kfree(res); |
338 | goto out; | |
339 | } | |
340 | ||
341 | mport->outb_msg[mbox].res = res; | |
342 | ||
343 | /* Hook the inbound message callback */ | |
344 | mport->outb_msg[mbox].mcback = moutb; | |
345 | ||
f8f06269 | 346 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
06e1b249 AB |
347 | if (rc) { |
348 | mport->outb_msg[mbox].mcback = NULL; | |
349 | mport->outb_msg[mbox].res = NULL; | |
350 | release_resource(res); | |
351 | kfree(res); | |
352 | } | |
394b701c MP |
353 | } else |
354 | rc = -ENOMEM; | |
355 | ||
356 | out: | |
357 | return rc; | |
358 | } | |
4ba61eca | 359 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); |
394b701c MP |
360 | |
361 | /** | |
362 | * rio_release_outb_mbox - release outbound mailbox message service | |
363 | * @mport: RIO master port from which to release the mailbox resource | |
364 | * @mbox: Mailbox number to release | |
365 | * | |
366 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
367 | * if the request has been satisfied. | |
368 | */ | |
369 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
370 | { | |
06e1b249 | 371 | int rc; |
394b701c | 372 | |
06e1b249 AB |
373 | if (!mport->ops->close_outb_mbox || !mport->outb_msg[mbox].res) |
374 | return -EINVAL; | |
375 | ||
376 | mport->ops->close_outb_mbox(mport, mbox); | |
377 | mport->outb_msg[mbox].mcback = NULL; | |
378 | ||
379 | rc = release_resource(mport->outb_msg[mbox].res); | |
380 | if (rc) | |
381 | return rc; | |
382 | ||
383 | kfree(mport->outb_msg[mbox].res); | |
384 | mport->outb_msg[mbox].res = NULL; | |
385 | ||
386 | return 0; | |
394b701c | 387 | } |
4ba61eca | 388 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |
394b701c MP |
389 | |
390 | /** | |
391 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
392 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 393 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
394 | * @res: Doorbell message resource |
395 | * @dinb: Callback to execute when doorbell is received | |
396 | * | |
397 | * Adds a doorbell resource/callback pair into a port's | |
398 | * doorbell event list. Returns 0 if the request has been | |
399 | * satisfied. | |
400 | */ | |
401 | static int | |
6978bbc0 MP |
402 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
403 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
404 | u16 info)) |
405 | { | |
e1d66d04 | 406 | struct rio_dbell *dbell = kmalloc(sizeof(*dbell), GFP_KERNEL); |
394b701c | 407 | |
1acd14bf ME |
408 | if (!dbell) |
409 | return -ENOMEM; | |
394b701c MP |
410 | |
411 | dbell->res = res; | |
412 | dbell->dinb = dinb; | |
6978bbc0 | 413 | dbell->dev_id = dev_id; |
394b701c | 414 | |
a7b4c636 | 415 | mutex_lock(&mport->lock); |
394b701c | 416 | list_add_tail(&dbell->node, &mport->dbells); |
a7b4c636 | 417 | mutex_unlock(&mport->lock); |
1acd14bf | 418 | return 0; |
394b701c MP |
419 | } |
420 | ||
421 | /** | |
422 | * rio_request_inb_dbell - request inbound doorbell message service | |
423 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 424 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
425 | * @start: Doorbell info range start |
426 | * @end: Doorbell info range end | |
427 | * @dinb: Callback to execute when doorbell is received | |
428 | * | |
429 | * Requests ownership of an inbound doorbell resource and binds | |
430 | * a callback function to the resource. Returns 0 if the request | |
431 | * has been satisfied. | |
432 | */ | |
433 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 434 | void *dev_id, |
394b701c MP |
435 | u16 start, |
436 | u16 end, | |
6978bbc0 | 437 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
438 | u16 dst, u16 info)) |
439 | { | |
002f6f40 | 440 | int rc; |
d1509c09 | 441 | struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL); |
394b701c MP |
442 | |
443 | if (res) { | |
444 | rio_init_dbell_res(res, start, end); | |
445 | ||
446 | /* Make sure these doorbells aren't in use */ | |
e1d66d04 ME |
447 | rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], |
448 | res); | |
449 | if (rc < 0) { | |
394b701c MP |
450 | kfree(res); |
451 | goto out; | |
452 | } | |
453 | ||
454 | /* Hook the doorbell callback */ | |
6978bbc0 | 455 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
456 | } else |
457 | rc = -ENOMEM; | |
458 | ||
459 | out: | |
460 | return rc; | |
461 | } | |
4ba61eca | 462 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); |
394b701c MP |
463 | |
464 | /** | |
465 | * rio_release_inb_dbell - release inbound doorbell message service | |
466 | * @mport: RIO master port from which to release the doorbell resource | |
467 | * @start: Doorbell info range start | |
468 | * @end: Doorbell info range end | |
469 | * | |
470 | * Releases ownership of an inbound doorbell resource and removes | |
471 | * callback from the doorbell event list. Returns 0 if the request | |
472 | * has been satisfied. | |
473 | */ | |
474 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
475 | { | |
476 | int rc = 0, found = 0; | |
477 | struct rio_dbell *dbell; | |
478 | ||
a7b4c636 | 479 | mutex_lock(&mport->lock); |
394b701c MP |
480 | list_for_each_entry(dbell, &mport->dbells, node) { |
481 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
a7b4c636 | 482 | list_del(&dbell->node); |
394b701c MP |
483 | found = 1; |
484 | break; | |
485 | } | |
486 | } | |
a7b4c636 | 487 | mutex_unlock(&mport->lock); |
394b701c MP |
488 | |
489 | /* If we can't find an exact match, fail */ | |
490 | if (!found) { | |
491 | rc = -EINVAL; | |
492 | goto out; | |
493 | } | |
494 | ||
394b701c MP |
495 | /* Release the doorbell resource */ |
496 | rc = release_resource(dbell->res); | |
497 | ||
498 | /* Free the doorbell event */ | |
499 | kfree(dbell); | |
500 | ||
501 | out: | |
502 | return rc; | |
503 | } | |
4ba61eca | 504 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); |
394b701c MP |
505 | |
506 | /** | |
507 | * rio_request_outb_dbell - request outbound doorbell message range | |
508 | * @rdev: RIO device from which to allocate the doorbell resource | |
509 | * @start: Doorbell message range start | |
510 | * @end: Doorbell message range end | |
511 | * | |
512 | * Requests ownership of a doorbell message range. Returns a resource | |
513 | * if the request has been satisfied or %NULL on failure. | |
514 | */ | |
515 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
516 | u16 end) | |
517 | { | |
9a975bee | 518 | struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
519 | |
520 | if (res) { | |
521 | rio_init_dbell_res(res, start, end); | |
522 | ||
523 | /* Make sure these doorbells aren't in use */ | |
524 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
525 | < 0) { | |
526 | kfree(res); | |
527 | res = NULL; | |
528 | } | |
529 | } | |
530 | ||
531 | return res; | |
532 | } | |
4ba61eca | 533 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); |
394b701c MP |
534 | |
535 | /** | |
536 | * rio_release_outb_dbell - release outbound doorbell message range | |
537 | * @rdev: RIO device from which to release the doorbell resource | |
538 | * @res: Doorbell resource to be freed | |
539 | * | |
540 | * Releases ownership of a doorbell message range. Returns 0 if the | |
541 | * request has been satisfied. | |
542 | */ | |
543 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
544 | { | |
545 | int rc = release_resource(res); | |
546 | ||
547 | kfree(res); | |
548 | ||
549 | return rc; | |
550 | } | |
4ba61eca | 551 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); |
394b701c | 552 | |
e5cabeb3 | 553 | /** |
9a0b0627 AB |
554 | * rio_add_mport_pw_handler - add port-write message handler into the list |
555 | * of mport specific pw handlers | |
556 | * @mport: RIO master port to bind the portwrite callback | |
557 | * @context: Handler specific context to pass on event | |
558 | * @pwcback: Callback to execute when portwrite is received | |
559 | * | |
560 | * Returns 0 if the request has been satisfied. | |
561 | */ | |
562 | int rio_add_mport_pw_handler(struct rio_mport *mport, void *context, | |
563 | int (*pwcback)(struct rio_mport *mport, | |
564 | void *context, union rio_pw_msg *msg, int step)) | |
565 | { | |
d1509c09 | 566 | struct rio_pwrite *pwrite = kzalloc(sizeof(*pwrite), GFP_KERNEL); |
9a0b0627 | 567 | |
1acd14bf ME |
568 | if (!pwrite) |
569 | return -ENOMEM; | |
9a0b0627 AB |
570 | |
571 | pwrite->pwcback = pwcback; | |
572 | pwrite->context = context; | |
573 | mutex_lock(&mport->lock); | |
574 | list_add_tail(&pwrite->node, &mport->pwrites); | |
575 | mutex_unlock(&mport->lock); | |
1acd14bf | 576 | return 0; |
9a0b0627 AB |
577 | } |
578 | EXPORT_SYMBOL_GPL(rio_add_mport_pw_handler); | |
579 | ||
580 | /** | |
581 | * rio_del_mport_pw_handler - remove port-write message handler from the list | |
582 | * of mport specific pw handlers | |
583 | * @mport: RIO master port to bind the portwrite callback | |
584 | * @context: Registered handler specific context to pass on event | |
585 | * @pwcback: Registered callback function | |
586 | * | |
587 | * Returns 0 if the request has been satisfied. | |
588 | */ | |
589 | int rio_del_mport_pw_handler(struct rio_mport *mport, void *context, | |
590 | int (*pwcback)(struct rio_mport *mport, | |
591 | void *context, union rio_pw_msg *msg, int step)) | |
592 | { | |
593 | int rc = -EINVAL; | |
594 | struct rio_pwrite *pwrite; | |
595 | ||
596 | mutex_lock(&mport->lock); | |
597 | list_for_each_entry(pwrite, &mport->pwrites, node) { | |
598 | if (pwrite->pwcback == pwcback && pwrite->context == context) { | |
599 | list_del(&pwrite->node); | |
600 | kfree(pwrite); | |
601 | rc = 0; | |
602 | break; | |
603 | } | |
604 | } | |
605 | mutex_unlock(&mport->lock); | |
606 | ||
607 | return rc; | |
608 | } | |
609 | EXPORT_SYMBOL_GPL(rio_del_mport_pw_handler); | |
610 | ||
611 | /** | |
612 | * rio_request_inb_pwrite - request inbound port-write message service for | |
613 | * specific RapidIO device | |
97ef6f74 | 614 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
615 | * @pwcback: Callback routine to execute when port-write is received |
616 | * | |
617 | * Binds a port-write callback function to the RapidIO device. | |
618 | * Returns 0 if the request has been satisfied. | |
619 | */ | |
620 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
621 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
622 | { | |
623 | int rc = 0; | |
624 | ||
625 | spin_lock(&rio_global_list_lock); | |
93dd49af | 626 | if (rdev->pwcback) |
e5cabeb3 AB |
627 | rc = -ENOMEM; |
628 | else | |
629 | rdev->pwcback = pwcback; | |
630 | ||
631 | spin_unlock(&rio_global_list_lock); | |
632 | return rc; | |
633 | } | |
634 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
635 | ||
636 | /** | |
637 | * rio_release_inb_pwrite - release inbound port-write message service | |
9a0b0627 | 638 | * associated with specific RapidIO device |
e5cabeb3 AB |
639 | * @rdev: RIO device which registered for inbound port-write callback |
640 | * | |
641 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
642 | * has been satisfied. | |
643 | */ | |
644 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
645 | { | |
646 | int rc = -ENOMEM; | |
647 | ||
648 | spin_lock(&rio_global_list_lock); | |
649 | if (rdev->pwcback) { | |
650 | rdev->pwcback = NULL; | |
651 | rc = 0; | |
652 | } | |
653 | ||
654 | spin_unlock(&rio_global_list_lock); | |
655 | return rc; | |
656 | } | |
657 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
658 | ||
b6cb95e8 AB |
659 | /** |
660 | * rio_pw_enable - Enables/disables port-write handling by a master port | |
661 | * @mport: Master port associated with port-write handling | |
662 | * @enable: 1=enable, 0=disable | |
663 | */ | |
664 | void rio_pw_enable(struct rio_mport *mport, int enable) | |
665 | { | |
666 | if (mport->ops->pwenable) { | |
667 | mutex_lock(&mport->lock); | |
668 | ||
669 | if ((enable && ++mport->pwe_refcnt == 1) || | |
670 | (!enable && mport->pwe_refcnt && --mport->pwe_refcnt == 0)) | |
671 | mport->ops->pwenable(mport, enable); | |
672 | mutex_unlock(&mport->lock); | |
673 | } | |
674 | } | |
675 | EXPORT_SYMBOL_GPL(rio_pw_enable); | |
676 | ||
da1589f0 AB |
677 | /** |
678 | * rio_map_inb_region -- Map inbound memory region. | |
679 | * @mport: Master port. | |
2ca3cb50 | 680 | * @local: physical address of memory region to be mapped |
da1589f0 AB |
681 | * @rbase: RIO base address assigned to this window |
682 | * @size: Size of the memory region | |
683 | * @rflags: Flags for mapping. | |
684 | * | |
685 | * Return: 0 -- Success. | |
686 | * | |
687 | * This function will create the mapping from RIO space to local memory. | |
688 | */ | |
689 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, | |
690 | u64 rbase, u32 size, u32 rflags) | |
691 | { | |
002f6f40 | 692 | int rc; |
da1589f0 AB |
693 | unsigned long flags; |
694 | ||
695 | if (!mport->ops->map_inb) | |
696 | return -1; | |
697 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
698 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); | |
699 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
700 | return rc; | |
701 | } | |
702 | EXPORT_SYMBOL_GPL(rio_map_inb_region); | |
703 | ||
704 | /** | |
705 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
706 | * @mport: Master port | |
707 | * @lstart: physical address of memory region to be unmapped | |
708 | */ | |
709 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) | |
710 | { | |
711 | unsigned long flags; | |
712 | if (!mport->ops->unmap_inb) | |
713 | return; | |
714 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
715 | mport->ops->unmap_inb(mport, lstart); | |
716 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
717 | } | |
718 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); | |
719 | ||
93bdaca5 AB |
720 | /** |
721 | * rio_map_outb_region -- Map outbound memory region. | |
722 | * @mport: Master port. | |
723 | * @destid: destination id window points to | |
724 | * @rbase: RIO base address window translates to | |
725 | * @size: Size of the memory region | |
726 | * @rflags: Flags for mapping. | |
727 | * @local: physical address of memory region mapped | |
728 | * | |
729 | * Return: 0 -- Success. | |
730 | * | |
731 | * This function will create the mapping from RIO space to local memory. | |
732 | */ | |
733 | int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase, | |
734 | u32 size, u32 rflags, dma_addr_t *local) | |
735 | { | |
002f6f40 | 736 | int rc; |
93bdaca5 AB |
737 | unsigned long flags; |
738 | ||
739 | if (!mport->ops->map_outb) | |
740 | return -ENODEV; | |
741 | ||
742 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
743 | rc = mport->ops->map_outb(mport, destid, rbase, size, | |
744 | rflags, local); | |
745 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
746 | ||
747 | return rc; | |
748 | } | |
749 | EXPORT_SYMBOL_GPL(rio_map_outb_region); | |
750 | ||
751 | /** | |
752 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
753 | * @mport: Master port | |
754 | * @destid: destination id mapping points to | |
755 | * @rstart: RIO base address window translates to | |
756 | */ | |
757 | void rio_unmap_outb_region(struct rio_mport *mport, u16 destid, u64 rstart) | |
758 | { | |
759 | unsigned long flags; | |
760 | ||
761 | if (!mport->ops->unmap_outb) | |
762 | return; | |
763 | ||
764 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
765 | mport->ops->unmap_outb(mport, destid, rstart); | |
766 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
767 | } | |
768 | EXPORT_SYMBOL_GPL(rio_unmap_outb_region); | |
769 | ||
e5cabeb3 AB |
770 | /** |
771 | * rio_mport_get_physefb - Helper function that returns register offset | |
772 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
773 | * @port: Master port to issue transaction |
774 | * @local: Indicate a local master port or remote device access | |
775 | * @destid: Destination ID of the device | |
776 | * @hopcount: Number of switch hops to the device | |
1ae842de | 777 | * @rmap: pointer to location to store register map type info |
e5cabeb3 AB |
778 | */ |
779 | u32 | |
780 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
1ae842de | 781 | u16 destid, u8 hopcount, u32 *rmap) |
e5cabeb3 AB |
782 | { |
783 | u32 ext_ftr_ptr; | |
784 | u32 ftr_header; | |
785 | ||
786 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
787 | ||
788 | while (ext_ftr_ptr) { | |
789 | if (local) | |
790 | rio_local_read_config_32(port, ext_ftr_ptr, | |
791 | &ftr_header); | |
792 | else | |
793 | rio_mport_read_config_32(port, destid, hopcount, | |
794 | ext_ftr_ptr, &ftr_header); | |
795 | ||
796 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
797 | switch (ftr_header) { | |
798 | ||
e5cabeb3 AB |
799 | case RIO_EFB_SER_EP_ID: |
800 | case RIO_EFB_SER_EP_REC_ID: | |
801 | case RIO_EFB_SER_EP_FREE_ID: | |
1ae842de AB |
802 | case RIO_EFB_SER_EP_M1_ID: |
803 | case RIO_EFB_SER_EP_SW_M1_ID: | |
804 | case RIO_EFB_SER_EPF_M1_ID: | |
805 | case RIO_EFB_SER_EPF_SW_M1_ID: | |
806 | *rmap = 1; | |
807 | return ext_ftr_ptr; | |
e5cabeb3 | 808 | |
1ae842de AB |
809 | case RIO_EFB_SER_EP_M2_ID: |
810 | case RIO_EFB_SER_EP_SW_M2_ID: | |
811 | case RIO_EFB_SER_EPF_M2_ID: | |
812 | case RIO_EFB_SER_EPF_SW_M2_ID: | |
813 | *rmap = 2; | |
e5cabeb3 AB |
814 | return ext_ftr_ptr; |
815 | ||
816 | default: | |
817 | break; | |
818 | } | |
819 | ||
820 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
821 | hopcount, ext_ftr_ptr); | |
822 | } | |
823 | ||
824 | return ext_ftr_ptr; | |
825 | } | |
a11650e1 | 826 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
e5cabeb3 AB |
827 | |
828 | /** | |
829 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 830 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
831 | * @from: Previous RIO device found in search, or %NULL for new search |
832 | * | |
833 | * Iterates through the list of known RIO devices. If a RIO device is | |
834 | * found with a matching @comp_tag, a pointer to its device | |
835 | * structure is returned. Otherwise, %NULL is returned. A new search | |
836 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
837 | * @from is not %NULL, searches continue from next device on the global | |
838 | * list. | |
839 | */ | |
af84ca38 | 840 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
841 | { |
842 | struct list_head *n; | |
843 | struct rio_dev *rdev; | |
844 | ||
e5cabeb3 AB |
845 | spin_lock(&rio_global_list_lock); |
846 | n = from ? from->global_list.next : rio_devices.next; | |
847 | ||
848 | while (n && (n != &rio_devices)) { | |
849 | rdev = rio_dev_g(n); | |
850 | if (rdev->comp_tag == comp_tag) | |
851 | goto exit; | |
852 | n = n->next; | |
853 | } | |
854 | rdev = NULL; | |
855 | exit: | |
856 | spin_unlock(&rio_global_list_lock); | |
857 | return rdev; | |
858 | } | |
a11650e1 | 859 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
e5cabeb3 AB |
860 | |
861 | /** | |
862 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
863 | * @rdev: Pointer to RIO device control structure | |
864 | * @pnum: Switch port number to set LOCKOUT bit | |
865 | * @lock: Operation : set (=1) or clear (=0) | |
866 | */ | |
867 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
868 | { | |
e5cabeb3 AB |
869 | u32 regval; |
870 | ||
a93192a5 | 871 | rio_read_config_32(rdev, |
1ae842de AB |
872 | RIO_DEV_PORT_N_CTL_CSR(rdev, pnum), |
873 | ®val); | |
e5cabeb3 AB |
874 | if (lock) |
875 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
876 | else | |
877 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
878 | ||
a93192a5 | 879 | rio_write_config_32(rdev, |
1ae842de AB |
880 | RIO_DEV_PORT_N_CTL_CSR(rdev, pnum), |
881 | regval); | |
e5cabeb3 AB |
882 | return 0; |
883 | } | |
a11650e1 AB |
884 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
885 | ||
a11650e1 AB |
886 | /** |
887 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of | |
888 | * given port | |
889 | * @port: Master port associated with the RIO network | |
890 | * @local: local=1 select local port otherwise a far device is reached | |
891 | * @destid: Destination ID of the device to check host bit | |
892 | * @hopcount: Number of hops to reach the target | |
893 | * @port_num: Port (-number on switch) to enable on a far end device | |
894 | * | |
895 | * Returns 0 or 1 from on General Control Command and Status Register | |
896 | * (EXT_PTR+0x3C) | |
897 | */ | |
898 | int rio_enable_rx_tx_port(struct rio_mport *port, | |
899 | int local, u16 destid, | |
900 | u8 hopcount, u8 port_num) | |
901 | { | |
902 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
903 | u32 regval; | |
904 | u32 ext_ftr_ptr; | |
1ae842de | 905 | u32 rmap; |
a11650e1 AB |
906 | |
907 | /* | |
908 | * enable rx input tx output port | |
909 | */ | |
910 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
911 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
912 | ||
1ae842de AB |
913 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, |
914 | hopcount, &rmap); | |
a11650e1 AB |
915 | |
916 | if (local) { | |
1ae842de AB |
917 | rio_local_read_config_32(port, |
918 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(0, rmap), | |
a11650e1 AB |
919 | ®val); |
920 | } else { | |
921 | if (rio_mport_read_config_32(port, destid, hopcount, | |
1ae842de AB |
922 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num, rmap), |
923 | ®val) < 0) | |
a11650e1 AB |
924 | return -EIO; |
925 | } | |
926 | ||
1ae842de | 927 | regval = regval | RIO_PORT_N_CTL_EN_RX | RIO_PORT_N_CTL_EN_TX; |
a11650e1 AB |
928 | |
929 | if (local) { | |
1ae842de AB |
930 | rio_local_write_config_32(port, |
931 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(0, rmap), regval); | |
a11650e1 AB |
932 | } else { |
933 | if (rio_mport_write_config_32(port, destid, hopcount, | |
1ae842de AB |
934 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num, rmap), |
935 | regval) < 0) | |
a11650e1 AB |
936 | return -EIO; |
937 | } | |
938 | #endif | |
939 | return 0; | |
940 | } | |
941 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); | |
942 | ||
e5cabeb3 | 943 | |
6429cd49 AB |
944 | /** |
945 | * rio_chk_dev_route - Validate route to the specified device. | |
946 | * @rdev: RIO device failed to respond | |
947 | * @nrdev: Last active device on the route to rdev | |
948 | * @npnum: nrdev's port number on the route to rdev | |
949 | * | |
950 | * Follows a route to the specified RIO device to determine the last available | |
951 | * device (and corresponding RIO port) on the route. | |
952 | */ | |
953 | static int | |
954 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
955 | { | |
956 | u32 result; | |
a93192a5 | 957 | int p_port, rc = -EIO; |
6429cd49 AB |
958 | struct rio_dev *prev = NULL; |
959 | ||
960 | /* Find switch with failed RIO link */ | |
961 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
962 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
963 | prev = rdev->prev; | |
964 | break; | |
965 | } | |
966 | rdev = rdev->prev; | |
967 | } | |
968 | ||
93dd49af | 969 | if (!prev) |
6429cd49 AB |
970 | goto err_out; |
971 | ||
a93192a5 | 972 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 973 | |
af84ca38 | 974 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
975 | pr_debug("RIO: link failed on [%s]-P%d\n", |
976 | rio_name(prev), p_port); | |
977 | *nrdev = prev; | |
978 | *npnum = p_port; | |
979 | rc = 0; | |
980 | } else | |
af84ca38 | 981 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
982 | err_out: |
983 | return rc; | |
984 | } | |
985 | ||
986 | /** | |
987 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
988 | * @mport: Master port to send transactions | |
989 | * @destid: Device destination ID in network | |
990 | * @hopcount: Number of hops into the network | |
991 | */ | |
e274e0ed | 992 | int |
6429cd49 AB |
993 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
994 | { | |
995 | int i = 0; | |
996 | u32 tmp; | |
997 | ||
998 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
999 | RIO_DEV_ID_CAR, &tmp)) { | |
1000 | i++; | |
1001 | if (i == RIO_MAX_CHK_RETRY) | |
1002 | return -EIO; | |
1003 | mdelay(1); | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
a11650e1 | 1008 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
6429cd49 AB |
1009 | |
1010 | /** | |
1011 | * rio_chk_dev_access - Validate access to the specified device. | |
1012 | * @rdev: Pointer to RIO device control structure | |
1013 | */ | |
1014 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
1015 | { | |
a93192a5 AB |
1016 | return rio_mport_chk_dev_access(rdev->net->hport, |
1017 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
1018 | } |
1019 | ||
dd5648c9 AB |
1020 | /** |
1021 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
1022 | * returns link-response (if requested). | |
1023 | * @rdev: RIO devive to issue Input-status command | |
1024 | * @pnum: Device port number to issue the command | |
1025 | * @lnkresp: Response from a link partner | |
1026 | */ | |
1027 | static int | |
1028 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
1029 | { | |
dd5648c9 AB |
1030 | u32 regval; |
1031 | int checkcount; | |
1032 | ||
1033 | if (lnkresp) { | |
1034 | /* Read from link maintenance response register | |
1035 | * to clear valid bit */ | |
a93192a5 | 1036 | rio_read_config_32(rdev, |
1ae842de | 1037 | RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum), |
dd5648c9 AB |
1038 | ®val); |
1039 | udelay(50); | |
1040 | } | |
1041 | ||
1042 | /* Issue Input-status command */ | |
a93192a5 | 1043 | rio_write_config_32(rdev, |
1ae842de | 1044 | RIO_DEV_PORT_N_MNT_REQ_CSR(rdev, pnum), |
dd5648c9 AB |
1045 | RIO_MNT_REQ_CMD_IS); |
1046 | ||
1047 | /* Exit if the response is not expected */ | |
93dd49af | 1048 | if (!lnkresp) |
dd5648c9 AB |
1049 | return 0; |
1050 | ||
1051 | checkcount = 3; | |
1052 | while (checkcount--) { | |
1053 | udelay(50); | |
a93192a5 | 1054 | rio_read_config_32(rdev, |
1ae842de | 1055 | RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum), |
dd5648c9 AB |
1056 | ®val); |
1057 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
1058 | *lnkresp = regval; | |
1059 | return 0; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | return -EIO; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
1068 | * @rdev: Pointer to RIO device control structure | |
1069 | * @pnum: Switch port number to clear errors | |
1070 | * @err_status: port error status (if 0 reads register from device) | |
1ae842de AB |
1071 | * |
1072 | * TODO: Currently this routine is not compatible with recovery process | |
1073 | * specified for idt_gen3 RapidIO switch devices. It has to be reviewed | |
1074 | * to implement universal recovery process that is compatible full range | |
1075 | * off available devices. | |
1076 | * IDT gen3 switch driver now implements HW-specific error handler that | |
1077 | * issues soft port reset to the port to reset ERR_STOP bits and ackIDs. | |
dd5648c9 AB |
1078 | */ |
1079 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
1080 | { | |
dd5648c9 AB |
1081 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
1082 | u32 regval; | |
1083 | u32 far_ackid, far_linkstat, near_ackid; | |
1084 | ||
1085 | if (err_status == 0) | |
a93192a5 | 1086 | rio_read_config_32(rdev, |
1ae842de | 1087 | RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum), |
dd5648c9 AB |
1088 | &err_status); |
1089 | ||
1ae842de | 1090 | if (err_status & RIO_PORT_N_ERR_STS_OUT_ES) { |
dd5648c9 AB |
1091 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); |
1092 | /* | |
1093 | * Send a Link-Request/Input-Status control symbol | |
1094 | */ | |
1095 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
1096 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
1097 | goto rd_err; | |
1098 | } | |
1099 | ||
1100 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
1101 | pnum, regval); | |
1102 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
1103 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 1104 | rio_read_config_32(rdev, |
1ae842de | 1105 | RIO_DEV_PORT_N_ACK_STS_CSR(rdev, pnum), |
dd5648c9 AB |
1106 | ®val); |
1107 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
1108 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
1109 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
1110 | " near_ackID=0x%02x\n", | |
1111 | pnum, far_ackid, far_linkstat, near_ackid); | |
1112 | ||
1113 | /* | |
1114 | * If required, synchronize ackIDs of near and | |
1115 | * far sides. | |
1116 | */ | |
1117 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
1118 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
1119 | /* Align near outstanding/outbound ackIDs with | |
1120 | * far inbound. | |
1121 | */ | |
a93192a5 | 1122 | rio_write_config_32(rdev, |
1ae842de | 1123 | RIO_DEV_PORT_N_ACK_STS_CSR(rdev, pnum), |
dd5648c9 AB |
1124 | (near_ackid << 24) | |
1125 | (far_ackid << 8) | far_ackid); | |
1126 | /* Align far outstanding/outbound ackIDs with | |
1127 | * near inbound. | |
1128 | */ | |
1129 | far_ackid++; | |
1ae842de AB |
1130 | if (!nextdev) { |
1131 | pr_debug("RIO_EM: nextdev pointer == NULL\n"); | |
1132 | goto rd_err; | |
1133 | } | |
1134 | ||
1135 | rio_write_config_32(nextdev, | |
1136 | RIO_DEV_PORT_N_ACK_STS_CSR(nextdev, | |
1137 | RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
1138 | (far_ackid << 24) | | |
1139 | (near_ackid << 8) | near_ackid); | |
dd5648c9 AB |
1140 | } |
1141 | rd_err: | |
1ae842de AB |
1142 | rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum), |
1143 | &err_status); | |
dd5648c9 AB |
1144 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
1145 | } | |
1146 | ||
1ae842de | 1147 | if ((err_status & RIO_PORT_N_ERR_STS_INP_ES) && nextdev) { |
dd5648c9 AB |
1148 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); |
1149 | rio_get_input_status(nextdev, | |
1150 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
1151 | udelay(50); | |
1152 | ||
1ae842de AB |
1153 | rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, pnum), |
1154 | &err_status); | |
dd5648c9 AB |
1155 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
1156 | } | |
1157 | ||
1ae842de AB |
1158 | return (err_status & (RIO_PORT_N_ERR_STS_OUT_ES | |
1159 | RIO_PORT_N_ERR_STS_INP_ES)) ? 1 : 0; | |
dd5648c9 AB |
1160 | } |
1161 | ||
e5cabeb3 | 1162 | /** |
9a0b0627 AB |
1163 | * rio_inb_pwrite_handler - inbound port-write message handler |
1164 | * @mport: mport device associated with port-write | |
e5cabeb3 AB |
1165 | * @pw_msg: pointer to inbound port-write message |
1166 | * | |
1167 | * Processes an inbound port-write message. Returns 0 if the request | |
1168 | * has been satisfied. | |
1169 | */ | |
9a0b0627 | 1170 | int rio_inb_pwrite_handler(struct rio_mport *mport, union rio_pw_msg *pw_msg) |
e5cabeb3 AB |
1171 | { |
1172 | struct rio_dev *rdev; | |
dd5648c9 | 1173 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 | 1174 | int rc, portnum; |
9a0b0627 | 1175 | struct rio_pwrite *pwrite; |
e5cabeb3 AB |
1176 | |
1177 | #ifdef DEBUG_PW | |
1178 | { | |
9a0b0627 AB |
1179 | u32 i; |
1180 | ||
1181 | pr_debug("%s: PW to mport_%d:\n", __func__, mport->id); | |
1182 | for (i = 0; i < RIO_PW_MSG_SIZE / sizeof(u32); i = i + 4) { | |
dd5648c9 | 1183 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
9a0b0627 AB |
1184 | i * 4, pw_msg->raw[i], pw_msg->raw[i + 1], |
1185 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
1186 | } | |
e5cabeb3 AB |
1187 | } |
1188 | #endif | |
1189 | ||
9a0b0627 AB |
1190 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
1191 | if (rdev) { | |
1192 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
1193 | } else { | |
1194 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
1195 | __func__, pw_msg->em.comptag); | |
1196 | } | |
1197 | ||
1198 | /* Call a device-specific handler (if it is registered for the device). | |
1199 | * This may be the service for endpoints that send device-specific | |
1200 | * port-write messages. End-point messages expected to be handled | |
1201 | * completely by EP specific device driver. | |
e5cabeb3 AB |
1202 | * For switches rc==0 signals that no standard processing required. |
1203 | */ | |
9a0b0627 | 1204 | if (rdev && rdev->pwcback) { |
e5cabeb3 AB |
1205 | rc = rdev->pwcback(rdev, pw_msg, 0); |
1206 | if (rc == 0) | |
1207 | return 0; | |
1208 | } | |
1209 | ||
9a0b0627 AB |
1210 | mutex_lock(&mport->lock); |
1211 | list_for_each_entry(pwrite, &mport->pwrites, node) | |
1212 | pwrite->pwcback(mport, pwrite->context, pw_msg, 0); | |
1213 | mutex_unlock(&mport->lock); | |
1214 | ||
1215 | if (!rdev) | |
1216 | return 0; | |
1217 | ||
1218 | /* | |
1219 | * FIXME: The code below stays as it was before for now until we decide | |
1220 | * how to do default PW handling in combination with per-mport callbacks | |
1221 | */ | |
1222 | ||
6429cd49 AB |
1223 | portnum = pw_msg->em.is_port & 0xFF; |
1224 | ||
1225 | /* Check if device and route to it are functional: | |
1226 | * Sometimes devices may send PW message(s) just before being | |
1227 | * powered down (or link being lost). | |
1228 | */ | |
1229 | if (rio_chk_dev_access(rdev)) { | |
1230 | pr_debug("RIO: device access failed - get link partner\n"); | |
1231 | /* Scan route to the device and identify failed link. | |
1232 | * This will replace device and port reported in PW message. | |
1233 | * PW message should not be used after this point. | |
1234 | */ | |
1235 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
1236 | pr_err("RIO: Route trace for %s failed\n", | |
1237 | rio_name(rdev)); | |
1238 | return -EIO; | |
1239 | } | |
1240 | pw_msg = NULL; | |
1241 | } | |
1242 | ||
e5cabeb3 AB |
1243 | /* For End-point devices processing stops here */ |
1244 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
1245 | return 0; | |
1246 | ||
1247 | if (rdev->phys_efptr == 0) { | |
1248 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
1249 | rio_name(rdev)); | |
1250 | return 0; | |
1251 | } | |
1252 | ||
e5cabeb3 AB |
1253 | /* |
1254 | * Process the port-write notification from switch | |
1255 | */ | |
2ec3ba69 AB |
1256 | if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle) |
1257 | rdev->rswitch->ops->em_handle(rdev, portnum); | |
e5cabeb3 | 1258 | |
1ae842de AB |
1259 | rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum), |
1260 | &err_status); | |
e5cabeb3 AB |
1261 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); |
1262 | ||
dd5648c9 | 1263 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 1264 | |
dd5648c9 AB |
1265 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
1266 | rdev->rswitch->port_ok |= (1 << portnum); | |
1267 | rio_set_port_lockout(rdev, portnum, 0); | |
1268 | /* Schedule Insertion Service */ | |
1269 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
1270 | rio_name(rdev), portnum); | |
1271 | } | |
e5cabeb3 | 1272 | |
dd5648c9 AB |
1273 | /* Clear error-stopped states (if reported). |
1274 | * Depending on the link partner state, two attempts | |
1275 | * may be needed for successful recovery. | |
1276 | */ | |
1ae842de AB |
1277 | if (err_status & (RIO_PORT_N_ERR_STS_OUT_ES | |
1278 | RIO_PORT_N_ERR_STS_INP_ES)) { | |
dd5648c9 AB |
1279 | if (rio_clr_err_stopped(rdev, portnum, err_status)) |
1280 | rio_clr_err_stopped(rdev, portnum, 0); | |
1281 | } | |
1282 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 1283 | |
dd5648c9 | 1284 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
1285 | rdev->rswitch->port_ok &= ~(1 << portnum); |
1286 | rio_set_port_lockout(rdev, portnum, 1); | |
1287 | ||
1ae842de | 1288 | if (rdev->phys_rmap == 1) { |
a93192a5 | 1289 | rio_write_config_32(rdev, |
1ae842de | 1290 | RIO_DEV_PORT_N_ACK_STS_CSR(rdev, portnum), |
e5cabeb3 | 1291 | RIO_PORT_N_ACK_CLEAR); |
1ae842de AB |
1292 | } else { |
1293 | rio_write_config_32(rdev, | |
1294 | RIO_DEV_PORT_N_OB_ACK_CSR(rdev, portnum), | |
1295 | RIO_PORT_N_OB_ACK_CLEAR); | |
1296 | rio_write_config_32(rdev, | |
1297 | RIO_DEV_PORT_N_IB_ACK_CSR(rdev, portnum), | |
1298 | 0); | |
1299 | } | |
e5cabeb3 AB |
1300 | |
1301 | /* Schedule Extraction Service */ | |
1302 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
1303 | rio_name(rdev), portnum); | |
1304 | } | |
dd5648c9 | 1305 | } |
e5cabeb3 | 1306 | |
a93192a5 | 1307 | rio_read_config_32(rdev, |
dd5648c9 AB |
1308 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
1309 | if (em_perrdet) { | |
1310 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
1311 | portnum, em_perrdet); | |
1312 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 1313 | rio_write_config_32(rdev, |
dd5648c9 AB |
1314 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
1315 | } | |
1316 | ||
a93192a5 | 1317 | rio_read_config_32(rdev, |
dd5648c9 AB |
1318 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
1319 | if (em_ltlerrdet) { | |
1320 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
1321 | em_ltlerrdet); | |
1322 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 1323 | rio_write_config_32(rdev, |
dd5648c9 | 1324 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
1325 | } |
1326 | ||
388c45cc | 1327 | /* Clear remaining error bits and Port-Write Pending bit */ |
1ae842de AB |
1328 | rio_write_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum), |
1329 | err_status); | |
e5cabeb3 AB |
1330 | |
1331 | return 0; | |
1332 | } | |
1333 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
1334 | ||
1335 | /** | |
1336 | * rio_mport_get_efb - get pointer to next extended features block | |
1337 | * @port: Master port to issue transaction | |
1338 | * @local: Indicate a local master port or remote device access | |
1339 | * @destid: Destination ID of the device | |
1340 | * @hopcount: Number of switch hops to the device | |
1341 | * @from: Offset of current Extended Feature block header (if 0 starts | |
1342 | * from ExtFeaturePtr) | |
1343 | */ | |
1344 | u32 | |
1345 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
1346 | u8 hopcount, u32 from) | |
1347 | { | |
1348 | u32 reg_val; | |
1349 | ||
1350 | if (from == 0) { | |
1351 | if (local) | |
1352 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
1353 | ®_val); | |
1354 | else | |
1355 | rio_mport_read_config_32(port, destid, hopcount, | |
1356 | RIO_ASM_INFO_CAR, ®_val); | |
1357 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
1358 | } else { | |
1359 | if (local) | |
1360 | rio_local_read_config_32(port, from, ®_val); | |
1361 | else | |
1362 | rio_mport_read_config_32(port, destid, hopcount, | |
1363 | from, ®_val); | |
1364 | return RIO_GET_BLOCK_ID(reg_val); | |
1365 | } | |
1366 | } | |
a11650e1 | 1367 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
e5cabeb3 | 1368 | |
394b701c MP |
1369 | /** |
1370 | * rio_mport_get_feature - query for devices' extended features | |
1371 | * @port: Master port to issue transaction | |
1372 | * @local: Indicate a local master port or remote device access | |
1373 | * @destid: Destination ID of the device | |
1374 | * @hopcount: Number of switch hops to the device | |
1375 | * @ftr: Extended feature code | |
1376 | * | |
1377 | * Tell if a device supports a given RapidIO capability. | |
1378 | * Returns the offset of the requested extended feature | |
1379 | * block within the device's RIO configuration space or | |
1ae842de | 1380 | * 0 in case the device does not support it. |
394b701c MP |
1381 | */ |
1382 | u32 | |
1383 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
1384 | u8 hopcount, int ftr) | |
1385 | { | |
1386 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
1387 | ||
1388 | if (local) | |
1389 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
1390 | else | |
1391 | rio_mport_read_config_32(port, destid, hopcount, | |
1392 | RIO_ASM_INFO_CAR, &asm_info); | |
1393 | ||
1394 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
1395 | ||
1396 | while (ext_ftr_ptr) { | |
1397 | if (local) | |
1398 | rio_local_read_config_32(port, ext_ftr_ptr, | |
1399 | &ftr_header); | |
1400 | else | |
1401 | rio_mport_read_config_32(port, destid, hopcount, | |
1402 | ext_ftr_ptr, &ftr_header); | |
1403 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
1404 | return ext_ftr_ptr; | |
e1d66d04 ME |
1405 | |
1406 | ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header); | |
1407 | if (!ext_ftr_ptr) | |
394b701c MP |
1408 | break; |
1409 | } | |
1410 | ||
1411 | return 0; | |
1412 | } | |
a11650e1 | 1413 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
394b701c MP |
1414 | |
1415 | /** | |
1416 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
1417 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1418 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1419 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
1420 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
1421 | * @from: Previous RIO device found in search, or %NULL for new search | |
1422 | * | |
1423 | * Iterates through the list of known RIO devices. If a RIO device is | |
1424 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
1425 | * count to the device is incrememted and a pointer to its device | |
1426 | * structure is returned. Otherwise, %NULL is returned. A new search | |
1427 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
1428 | * @from is not %NULL, searches continue from next device on the global | |
1429 | * list. The reference count for @from is always decremented if it is | |
1430 | * not %NULL. | |
1431 | */ | |
1432 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
1433 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
1434 | { | |
1435 | struct list_head *n; | |
1436 | struct rio_dev *rdev; | |
1437 | ||
1438 | WARN_ON(in_interrupt()); | |
1439 | spin_lock(&rio_global_list_lock); | |
1440 | n = from ? from->global_list.next : rio_devices.next; | |
1441 | ||
1442 | while (n && (n != &rio_devices)) { | |
1443 | rdev = rio_dev_g(n); | |
1444 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1445 | (did == RIO_ANY_ID || rdev->did == did) && | |
1446 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1447 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1448 | goto exit; | |
1449 | n = n->next; | |
1450 | } | |
1451 | rdev = NULL; | |
1452 | exit: | |
1453 | rio_dev_put(from); | |
1454 | rdev = rio_dev_get(rdev); | |
1455 | spin_unlock(&rio_global_list_lock); | |
1456 | return rdev; | |
1457 | } | |
4ba61eca | 1458 | EXPORT_SYMBOL_GPL(rio_get_asm); |
394b701c MP |
1459 | |
1460 | /** | |
1461 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1462 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1463 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1464 | * @from: Previous RIO device found in search, or %NULL for new search | |
1465 | * | |
1466 | * Iterates through the list of known RIO devices. If a RIO device is | |
1467 | * found with a matching @vid and @did, the reference count to the | |
1468 | * device is incrememted and a pointer to its device structure is returned. | |
1469 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1470 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1471 | * continue from next device on the global list. The reference count for | |
1472 | * @from is always decremented if it is not %NULL. | |
1473 | */ | |
1474 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1475 | { | |
1476 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1477 | } | |
4ba61eca | 1478 | EXPORT_SYMBOL_GPL(rio_get_device); |
394b701c | 1479 | |
07590ff0 AB |
1480 | /** |
1481 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1482 | * registers defined in RIO specification rev.1.3 | |
1483 | * @mport: Master port to issue transaction | |
1484 | * @destid: Destination ID of the device | |
1485 | * @hopcount: Number of switch hops to the device | |
1486 | * @table: routing table ID (global or port-specific) | |
1487 | * @route_destid: destID entry in the RT | |
1488 | * @route_port: destination port for specified destID | |
1489 | */ | |
2ec3ba69 AB |
1490 | static int |
1491 | rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1492 | u16 table, u16 route_destid, u8 route_port) | |
07590ff0 AB |
1493 | { |
1494 | if (table == RIO_GLOBAL_TABLE) { | |
1495 | rio_mport_write_config_32(mport, destid, hopcount, | |
1496 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1497 | (u32)route_destid); | |
1498 | rio_mport_write_config_32(mport, destid, hopcount, | |
1499 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1500 | (u32)route_port); | |
1501 | } | |
e5cabeb3 | 1502 | |
07590ff0 AB |
1503 | udelay(10); |
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | /** | |
1508 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1509 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1510 | * specification rev.1.3 |
1511 | * @mport: Master port to issue transaction | |
1512 | * @destid: Destination ID of the device | |
1513 | * @hopcount: Number of switch hops to the device | |
1514 | * @table: routing table ID (global or port-specific) | |
1515 | * @route_destid: destID entry in the RT | |
1516 | * @route_port: returned destination port for specified destID | |
1517 | */ | |
2ec3ba69 AB |
1518 | static int |
1519 | rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1520 | u16 table, u16 route_destid, u8 *route_port) | |
07590ff0 AB |
1521 | { |
1522 | u32 result; | |
1523 | ||
1524 | if (table == RIO_GLOBAL_TABLE) { | |
1525 | rio_mport_write_config_32(mport, destid, hopcount, | |
1526 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1527 | rio_mport_read_config_32(mport, destid, hopcount, | |
1528 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1529 | ||
1530 | *route_port = (u8)result; | |
1531 | } | |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | /** | |
1537 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1538 | * defined in RIO specification rev.1.3. | |
1539 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1540 | * @destid: Destination ID of the device |
1541 | * @hopcount: Number of switch hops to the device | |
1542 | * @table: routing table ID (global or port-specific) | |
1543 | */ | |
2ec3ba69 AB |
1544 | static int |
1545 | rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1546 | u16 table) | |
07590ff0 AB |
1547 | { |
1548 | u32 max_destid = 0xff; | |
1549 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1550 | u32 port_sel = RIO_INVALID_ROUTE; | |
1551 | ||
1552 | if (table == RIO_GLOBAL_TABLE) { | |
1553 | rio_mport_read_config_32(mport, destid, hopcount, | |
1554 | RIO_PEF_CAR, &pef); | |
1555 | ||
1556 | if (mport->sys_size) { | |
1557 | rio_mport_read_config_32(mport, destid, hopcount, | |
1558 | RIO_SWITCH_RT_LIMIT, | |
1559 | &max_destid); | |
1560 | max_destid &= RIO_RT_MAX_DESTID; | |
1561 | } | |
1562 | ||
1563 | if (pef & RIO_PEF_EXT_RT) { | |
1564 | ext_cfg = 0x80000000; | |
1565 | id_inc = 4; | |
1566 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1567 | (RIO_INVALID_ROUTE << 16) | | |
1568 | (RIO_INVALID_ROUTE << 8) | | |
1569 | RIO_INVALID_ROUTE; | |
1570 | } | |
1571 | ||
1572 | for (i = 0; i <= max_destid;) { | |
1573 | rio_mport_write_config_32(mport, destid, hopcount, | |
1574 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1575 | ext_cfg | i); | |
1576 | rio_mport_write_config_32(mport, destid, hopcount, | |
1577 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1578 | port_sel); | |
1579 | i += id_inc; | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | udelay(10); | |
1584 | return 0; | |
1585 | } | |
1586 | ||
2ec3ba69 AB |
1587 | /** |
1588 | * rio_lock_device - Acquires host device lock for specified device | |
1589 | * @port: Master port to send transaction | |
1590 | * @destid: Destination ID for device/switch | |
1591 | * @hopcount: Hopcount to reach switch | |
1592 | * @wait_ms: Max wait time in msec (0 = no timeout) | |
1593 | * | |
1594 | * Attepts to acquire host device lock for specified device | |
1595 | * Returns 0 if device lock acquired or EINVAL if timeout expires. | |
1596 | */ | |
1597 | int rio_lock_device(struct rio_mport *port, u16 destid, | |
1598 | u8 hopcount, int wait_ms) | |
1599 | { | |
1600 | u32 result; | |
1601 | int tcnt = 0; | |
1602 | ||
1603 | /* Attempt to acquire device lock */ | |
1604 | rio_mport_write_config_32(port, destid, hopcount, | |
1605 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); | |
1606 | rio_mport_read_config_32(port, destid, hopcount, | |
1607 | RIO_HOST_DID_LOCK_CSR, &result); | |
1608 | ||
1609 | while (result != port->host_deviceid) { | |
1610 | if (wait_ms != 0 && tcnt == wait_ms) { | |
1611 | pr_debug("RIO: timeout when locking device %x:%x\n", | |
1612 | destid, hopcount); | |
1613 | return -EINVAL; | |
1614 | } | |
1615 | ||
1616 | /* Delay a bit */ | |
1617 | mdelay(1); | |
1618 | tcnt++; | |
1619 | /* Try to acquire device lock again */ | |
1620 | rio_mport_write_config_32(port, destid, | |
1621 | hopcount, | |
1622 | RIO_HOST_DID_LOCK_CSR, | |
1623 | port->host_deviceid); | |
1624 | rio_mport_read_config_32(port, destid, | |
1625 | hopcount, | |
1626 | RIO_HOST_DID_LOCK_CSR, &result); | |
1627 | } | |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | EXPORT_SYMBOL_GPL(rio_lock_device); | |
1632 | ||
1633 | /** | |
1634 | * rio_unlock_device - Releases host device lock for specified device | |
1635 | * @port: Master port to send transaction | |
1636 | * @destid: Destination ID for device/switch | |
1637 | * @hopcount: Hopcount to reach switch | |
1638 | * | |
1639 | * Returns 0 if device lock released or EINVAL if fails. | |
1640 | */ | |
1641 | int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) | |
1642 | { | |
1643 | u32 result; | |
1644 | ||
1645 | /* Release device lock */ | |
1646 | rio_mport_write_config_32(port, destid, | |
1647 | hopcount, | |
1648 | RIO_HOST_DID_LOCK_CSR, | |
1649 | port->host_deviceid); | |
1650 | rio_mport_read_config_32(port, destid, hopcount, | |
1651 | RIO_HOST_DID_LOCK_CSR, &result); | |
1652 | if ((result & 0xffff) != 0xffff) { | |
1653 | pr_debug("RIO: badness when releasing device lock %x:%x\n", | |
1654 | destid, hopcount); | |
1655 | return -EINVAL; | |
1656 | } | |
1657 | ||
1658 | return 0; | |
1659 | } | |
1660 | EXPORT_SYMBOL_GPL(rio_unlock_device); | |
1661 | ||
1662 | /** | |
1663 | * rio_route_add_entry- Add a route entry to a switch routing table | |
1664 | * @rdev: RIO device | |
1665 | * @table: Routing table ID | |
1666 | * @route_destid: Destination ID to be routed | |
1667 | * @route_port: Port number to be routed | |
1668 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1669 | * | |
1670 | * If available calls the switch specific add_entry() method to add a route | |
1671 | * entry into a switch routing table. Otherwise uses standard RT update method | |
1672 | * as defined by RapidIO specification. A specific routing table can be selected | |
1673 | * using the @table argument if a switch has per port routing tables or | |
1674 | * the standard (or global) table may be used by passing | |
1675 | * %RIO_GLOBAL_TABLE in @table. | |
1676 | * | |
1677 | * Returns %0 on success or %-EINVAL on failure. | |
1678 | */ | |
1679 | int rio_route_add_entry(struct rio_dev *rdev, | |
1680 | u16 table, u16 route_destid, u8 route_port, int lock) | |
1681 | { | |
1682 | int rc = -EINVAL; | |
1683 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1684 | ||
1685 | if (lock) { | |
1686 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1687 | rdev->hopcount, 1000); | |
1688 | if (rc) | |
1689 | return rc; | |
1690 | } | |
1691 | ||
1692 | spin_lock(&rdev->rswitch->lock); | |
1693 | ||
93dd49af | 1694 | if (!ops || !ops->add_entry) { |
2ec3ba69 AB |
1695 | rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid, |
1696 | rdev->hopcount, table, | |
1697 | route_destid, route_port); | |
1698 | } else if (try_module_get(ops->owner)) { | |
1699 | rc = ops->add_entry(rdev->net->hport, rdev->destid, | |
1700 | rdev->hopcount, table, route_destid, | |
1701 | route_port); | |
1702 | module_put(ops->owner); | |
1703 | } | |
1704 | ||
1705 | spin_unlock(&rdev->rswitch->lock); | |
1706 | ||
1707 | if (lock) | |
1708 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1709 | rdev->hopcount); | |
1710 | ||
1711 | return rc; | |
1712 | } | |
1713 | EXPORT_SYMBOL_GPL(rio_route_add_entry); | |
1714 | ||
1715 | /** | |
1716 | * rio_route_get_entry- Read an entry from a switch routing table | |
1717 | * @rdev: RIO device | |
1718 | * @table: Routing table ID | |
1719 | * @route_destid: Destination ID to be routed | |
1720 | * @route_port: Pointer to read port number into | |
1721 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1722 | * | |
1723 | * If available calls the switch specific get_entry() method to fetch a route | |
1724 | * entry from a switch routing table. Otherwise uses standard RT read method | |
1725 | * as defined by RapidIO specification. A specific routing table can be selected | |
1726 | * using the @table argument if a switch has per port routing tables or | |
1727 | * the standard (or global) table may be used by passing | |
1728 | * %RIO_GLOBAL_TABLE in @table. | |
1729 | * | |
1730 | * Returns %0 on success or %-EINVAL on failure. | |
1731 | */ | |
1732 | int rio_route_get_entry(struct rio_dev *rdev, u16 table, | |
1733 | u16 route_destid, u8 *route_port, int lock) | |
1734 | { | |
1735 | int rc = -EINVAL; | |
1736 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1737 | ||
1738 | if (lock) { | |
1739 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1740 | rdev->hopcount, 1000); | |
1741 | if (rc) | |
1742 | return rc; | |
1743 | } | |
1744 | ||
1745 | spin_lock(&rdev->rswitch->lock); | |
1746 | ||
93dd49af | 1747 | if (!ops || !ops->get_entry) { |
2ec3ba69 AB |
1748 | rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid, |
1749 | rdev->hopcount, table, | |
1750 | route_destid, route_port); | |
1751 | } else if (try_module_get(ops->owner)) { | |
1752 | rc = ops->get_entry(rdev->net->hport, rdev->destid, | |
1753 | rdev->hopcount, table, route_destid, | |
1754 | route_port); | |
1755 | module_put(ops->owner); | |
1756 | } | |
1757 | ||
1758 | spin_unlock(&rdev->rswitch->lock); | |
1759 | ||
1760 | if (lock) | |
1761 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1762 | rdev->hopcount); | |
1763 | return rc; | |
1764 | } | |
1765 | EXPORT_SYMBOL_GPL(rio_route_get_entry); | |
1766 | ||
1767 | /** | |
1768 | * rio_route_clr_table - Clear a switch routing table | |
1769 | * @rdev: RIO device | |
1770 | * @table: Routing table ID | |
1771 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1772 | * | |
1773 | * If available calls the switch specific clr_table() method to clear a switch | |
1774 | * routing table. Otherwise uses standard RT write method as defined by RapidIO | |
1775 | * specification. A specific routing table can be selected using the @table | |
1776 | * argument if a switch has per port routing tables or the standard (or global) | |
1777 | * table may be used by passing %RIO_GLOBAL_TABLE in @table. | |
1778 | * | |
1779 | * Returns %0 on success or %-EINVAL on failure. | |
1780 | */ | |
1781 | int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock) | |
1782 | { | |
1783 | int rc = -EINVAL; | |
1784 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1785 | ||
1786 | if (lock) { | |
1787 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1788 | rdev->hopcount, 1000); | |
1789 | if (rc) | |
1790 | return rc; | |
1791 | } | |
1792 | ||
1793 | spin_lock(&rdev->rswitch->lock); | |
1794 | ||
93dd49af | 1795 | if (!ops || !ops->clr_table) { |
2ec3ba69 AB |
1796 | rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid, |
1797 | rdev->hopcount, table); | |
1798 | } else if (try_module_get(ops->owner)) { | |
1799 | rc = ops->clr_table(rdev->net->hport, rdev->destid, | |
1800 | rdev->hopcount, table); | |
1801 | ||
1802 | module_put(ops->owner); | |
1803 | } | |
1804 | ||
1805 | spin_unlock(&rdev->rswitch->lock); | |
1806 | ||
1807 | if (lock) | |
1808 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1809 | rdev->hopcount); | |
1810 | ||
1811 | return rc; | |
1812 | } | |
1813 | EXPORT_SYMBOL_GPL(rio_route_clr_table); | |
1814 | ||
e42d98eb AB |
1815 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
1816 | ||
1817 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) | |
1818 | { | |
4aff1ce7 | 1819 | struct rio_mport *mport = arg; |
e42d98eb AB |
1820 | |
1821 | /* Check that DMA device belongs to the right MPORT */ | |
4aff1ce7 | 1822 | return mport == container_of(chan->device, struct rio_mport, dma); |
e42d98eb AB |
1823 | } |
1824 | ||
1825 | /** | |
4aff1ce7 AB |
1826 | * rio_request_mport_dma - request RapidIO capable DMA channel associated |
1827 | * with specified local RapidIO mport device. | |
1828 | * @mport: RIO mport to perform DMA data transfers | |
e42d98eb AB |
1829 | * |
1830 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1831 | */ | |
4aff1ce7 | 1832 | struct dma_chan *rio_request_mport_dma(struct rio_mport *mport) |
e42d98eb AB |
1833 | { |
1834 | dma_cap_mask_t mask; | |
e42d98eb AB |
1835 | |
1836 | dma_cap_zero(mask); | |
1837 | dma_cap_set(DMA_SLAVE, mask); | |
4aff1ce7 AB |
1838 | return dma_request_channel(mask, rio_chan_filter, mport); |
1839 | } | |
1840 | EXPORT_SYMBOL_GPL(rio_request_mport_dma); | |
e42d98eb | 1841 | |
4aff1ce7 AB |
1842 | /** |
1843 | * rio_request_dma - request RapidIO capable DMA channel that supports | |
1844 | * specified target RapidIO device. | |
1845 | * @rdev: RIO device associated with DMA transfer | |
1846 | * | |
1847 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1848 | */ | |
1849 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) | |
1850 | { | |
1851 | return rio_request_mport_dma(rdev->net->hport); | |
e42d98eb AB |
1852 | } |
1853 | EXPORT_SYMBOL_GPL(rio_request_dma); | |
1854 | ||
1855 | /** | |
1856 | * rio_release_dma - release specified DMA channel | |
1857 | * @dchan: DMA channel to release | |
1858 | */ | |
1859 | void rio_release_dma(struct dma_chan *dchan) | |
1860 | { | |
1861 | dma_release_channel(dchan); | |
1862 | } | |
1863 | EXPORT_SYMBOL_GPL(rio_release_dma); | |
1864 | ||
1865 | /** | |
4aff1ce7 | 1866 | * rio_dma_prep_xfer - RapidIO specific wrapper |
e42d98eb | 1867 | * for device_prep_slave_sg callback defined by DMAENGINE. |
e42d98eb | 1868 | * @dchan: DMA channel to configure |
4aff1ce7 | 1869 | * @destid: target RapidIO device destination ID |
e42d98eb AB |
1870 | * @data: RIO specific data descriptor |
1871 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1872 | * @flags: dmaengine defined flags | |
1873 | * | |
1874 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1875 | * Uses DMA channel private extension to pass information related to remote | |
1876 | * target RIO device. | |
f8e3a68c AB |
1877 | * |
1878 | * Returns: pointer to DMA transaction descriptor if successful, | |
1879 | * error-valued pointer or NULL if failed. | |
e42d98eb | 1880 | */ |
4aff1ce7 AB |
1881 | struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan, |
1882 | u16 destid, struct rio_dma_data *data, | |
e42d98eb AB |
1883 | enum dma_transfer_direction direction, unsigned long flags) |
1884 | { | |
e42d98eb AB |
1885 | struct rio_dma_ext rio_ext; |
1886 | ||
93dd49af | 1887 | if (!dchan->device->device_prep_slave_sg) { |
e42d98eb AB |
1888 | pr_err("%s: prep_rio_sg == NULL\n", __func__); |
1889 | return NULL; | |
1890 | } | |
1891 | ||
4aff1ce7 | 1892 | rio_ext.destid = destid; |
e42d98eb AB |
1893 | rio_ext.rio_addr_u = data->rio_addr_u; |
1894 | rio_ext.rio_addr = data->rio_addr; | |
1895 | rio_ext.wr_type = data->wr_type; | |
1896 | ||
4aff1ce7 AB |
1897 | return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, |
1898 | direction, flags, &rio_ext); | |
1899 | } | |
1900 | EXPORT_SYMBOL_GPL(rio_dma_prep_xfer); | |
e42d98eb | 1901 | |
4aff1ce7 AB |
1902 | /** |
1903 | * rio_dma_prep_slave_sg - RapidIO specific wrapper | |
1904 | * for device_prep_slave_sg callback defined by DMAENGINE. | |
1905 | * @rdev: RIO device control structure | |
1906 | * @dchan: DMA channel to configure | |
1907 | * @data: RIO specific data descriptor | |
1908 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1909 | * @flags: dmaengine defined flags | |
1910 | * | |
1911 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1912 | * Uses DMA channel private extension to pass information related to remote | |
1913 | * target RIO device. | |
f8e3a68c AB |
1914 | * |
1915 | * Returns: pointer to DMA transaction descriptor if successful, | |
1916 | * error-valued pointer or NULL if failed. | |
4aff1ce7 AB |
1917 | */ |
1918 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, | |
1919 | struct dma_chan *dchan, struct rio_dma_data *data, | |
1920 | enum dma_transfer_direction direction, unsigned long flags) | |
1921 | { | |
1922 | return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags); | |
e42d98eb AB |
1923 | } |
1924 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); | |
1925 | ||
1926 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ | |
1927 | ||
bc8fcfea AB |
1928 | /** |
1929 | * rio_find_mport - find RIO mport by its ID | |
1930 | * @mport_id: number (ID) of mport device | |
1931 | * | |
1932 | * Given a RIO mport number, the desired mport is located | |
1933 | * in the global list of mports. If the mport is found, a pointer to its | |
1934 | * data structure is returned. If no mport is found, %NULL is returned. | |
1935 | */ | |
1936 | struct rio_mport *rio_find_mport(int mport_id) | |
1937 | { | |
1938 | struct rio_mport *port; | |
1939 | ||
1940 | mutex_lock(&rio_mport_list_lock); | |
1941 | list_for_each_entry(port, &rio_mports, node) { | |
1942 | if (port->id == mport_id) | |
1943 | goto found; | |
1944 | } | |
1945 | port = NULL; | |
1946 | found: | |
1947 | mutex_unlock(&rio_mport_list_lock); | |
1948 | ||
1949 | return port; | |
1950 | } | |
1951 | ||
a11650e1 AB |
1952 | /** |
1953 | * rio_register_scan - enumeration/discovery method registration interface | |
1954 | * @mport_id: mport device ID for which fabric scan routine has to be set | |
1955 | * (RIO_MPORT_ANY = set for all available mports) | |
9edbc30b AB |
1956 | * @scan_ops: enumeration/discovery operations structure |
1957 | * | |
1958 | * Registers enumeration/discovery operations with RapidIO subsystem and | |
1959 | * attaches it to the specified mport device (or all available mports | |
1960 | * if RIO_MPORT_ANY is specified). | |
a11650e1 | 1961 | * |
a11650e1 | 1962 | * Returns error if the mport already has an enumerator attached to it. |
9edbc30b | 1963 | * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error). |
a11650e1 AB |
1964 | */ |
1965 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) | |
1966 | { | |
1967 | struct rio_mport *port; | |
9edbc30b AB |
1968 | struct rio_scan_node *scan; |
1969 | int rc = 0; | |
a11650e1 | 1970 | |
9edbc30b | 1971 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
a11650e1 | 1972 | |
9edbc30b AB |
1973 | if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) || |
1974 | !scan_ops) | |
1975 | return -EINVAL; | |
a11650e1 | 1976 | |
9edbc30b AB |
1977 | mutex_lock(&rio_mport_list_lock); |
1978 | ||
1979 | /* | |
1980 | * Check if there is another enumerator already registered for | |
1981 | * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators | |
1982 | * for the same mport ID are not supported. | |
1983 | */ | |
1984 | list_for_each_entry(scan, &rio_scans, node) { | |
1985 | if (scan->mport_id == mport_id) { | |
1986 | rc = -EBUSY; | |
1987 | goto err_out; | |
a11650e1 AB |
1988 | } |
1989 | } | |
9edbc30b AB |
1990 | |
1991 | /* | |
1992 | * Allocate and initialize new scan registration node. | |
1993 | */ | |
1994 | scan = kzalloc(sizeof(*scan), GFP_KERNEL); | |
1995 | if (!scan) { | |
1996 | rc = -ENOMEM; | |
1997 | goto err_out; | |
1998 | } | |
1999 | ||
2000 | scan->mport_id = mport_id; | |
2001 | scan->ops = scan_ops; | |
2002 | ||
2003 | /* | |
2004 | * Traverse the list of registered mports to attach this new scan. | |
2005 | * | |
2006 | * The new scan with matching mport ID overrides any previously attached | |
2007 | * scan assuming that old scan (if any) is the default one (based on the | |
2008 | * enumerator registration check above). | |
2009 | * If the new scan is the global one, it will be attached only to mports | |
2010 | * that do not have their own individual operations already attached. | |
2011 | */ | |
2012 | list_for_each_entry(port, &rio_mports, node) { | |
2013 | if (port->id == mport_id) { | |
2014 | port->nscan = scan_ops; | |
2015 | break; | |
2016 | } else if (mport_id == RIO_MPORT_ANY && !port->nscan) | |
2017 | port->nscan = scan_ops; | |
2018 | } | |
2019 | ||
2020 | list_add_tail(&scan->node, &rio_scans); | |
2021 | ||
2022 | err_out: | |
a11650e1 AB |
2023 | mutex_unlock(&rio_mport_list_lock); |
2024 | ||
2025 | return rc; | |
2026 | } | |
2027 | EXPORT_SYMBOL_GPL(rio_register_scan); | |
2028 | ||
2029 | /** | |
2030 | * rio_unregister_scan - removes enumeration/discovery method from mport | |
2031 | * @mport_id: mport device ID for which fabric scan routine has to be | |
9edbc30b AB |
2032 | * unregistered (RIO_MPORT_ANY = apply to all mports that use |
2033 | * the specified scan_ops) | |
2034 | * @scan_ops: enumeration/discovery operations structure | |
a11650e1 AB |
2035 | * |
2036 | * Removes enumeration or discovery method assigned to the specified mport | |
9edbc30b AB |
2037 | * device. If RIO_MPORT_ANY is specified, removes the specified operations from |
2038 | * all mports that have them attached. | |
a11650e1 | 2039 | */ |
9edbc30b | 2040 | int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops) |
a11650e1 AB |
2041 | { |
2042 | struct rio_mport *port; | |
9edbc30b AB |
2043 | struct rio_scan_node *scan; |
2044 | ||
2045 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); | |
2046 | ||
2047 | if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) | |
2048 | return -EINVAL; | |
a11650e1 AB |
2049 | |
2050 | mutex_lock(&rio_mport_list_lock); | |
9edbc30b AB |
2051 | |
2052 | list_for_each_entry(port, &rio_mports, node) | |
2053 | if (port->id == mport_id || | |
2054 | (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops)) | |
2055 | port->nscan = NULL; | |
2056 | ||
f93f3c4e | 2057 | list_for_each_entry(scan, &rio_scans, node) { |
9edbc30b AB |
2058 | if (scan->mport_id == mport_id) { |
2059 | list_del(&scan->node); | |
2060 | kfree(scan); | |
f93f3c4e | 2061 | break; |
a11650e1 | 2062 | } |
f93f3c4e | 2063 | } |
9edbc30b | 2064 | |
a11650e1 AB |
2065 | mutex_unlock(&rio_mport_list_lock); |
2066 | ||
2067 | return 0; | |
2068 | } | |
2069 | EXPORT_SYMBOL_GPL(rio_unregister_scan); | |
2070 | ||
9edbc30b AB |
2071 | /** |
2072 | * rio_mport_scan - execute enumeration/discovery on the specified mport | |
2073 | * @mport_id: number (ID) of mport device | |
2074 | */ | |
2075 | int rio_mport_scan(int mport_id) | |
2076 | { | |
2077 | struct rio_mport *port = NULL; | |
2078 | int rc; | |
2079 | ||
2080 | mutex_lock(&rio_mport_list_lock); | |
2081 | list_for_each_entry(port, &rio_mports, node) { | |
2082 | if (port->id == mport_id) | |
2083 | goto found; | |
2084 | } | |
2085 | mutex_unlock(&rio_mport_list_lock); | |
2086 | return -ENODEV; | |
2087 | found: | |
2088 | if (!port->nscan) { | |
2089 | mutex_unlock(&rio_mport_list_lock); | |
2090 | return -EINVAL; | |
2091 | } | |
2092 | ||
2093 | if (!try_module_get(port->nscan->owner)) { | |
2094 | mutex_unlock(&rio_mport_list_lock); | |
2095 | return -ENODEV; | |
2096 | } | |
2097 | ||
2098 | mutex_unlock(&rio_mport_list_lock); | |
2099 | ||
2100 | if (port->host_deviceid >= 0) | |
2101 | rc = port->nscan->enumerate(port, 0); | |
2102 | else | |
2103 | rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); | |
2104 | ||
2105 | module_put(port->nscan->owner); | |
2106 | return rc; | |
2107 | } | |
2108 | ||
394b701c MP |
2109 | static void rio_fixup_device(struct rio_dev *dev) |
2110 | { | |
2111 | } | |
2112 | ||
305c891e | 2113 | static int rio_init(void) |
394b701c MP |
2114 | { |
2115 | struct rio_dev *dev = NULL; | |
2116 | ||
2117 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
2118 | rio_fixup_device(dev); | |
2119 | } | |
2120 | return 0; | |
2121 | } | |
2122 | ||
005842ef AB |
2123 | static struct workqueue_struct *rio_wq; |
2124 | ||
2125 | struct rio_disc_work { | |
2126 | struct work_struct work; | |
2127 | struct rio_mport *mport; | |
2128 | }; | |
2129 | ||
305c891e | 2130 | static void disc_work_handler(struct work_struct *_work) |
005842ef AB |
2131 | { |
2132 | struct rio_disc_work *work; | |
2133 | ||
2134 | work = container_of(_work, struct rio_disc_work, work); | |
2135 | pr_debug("RIO: discovery work for mport %d %s\n", | |
2136 | work->mport->id, work->mport->name); | |
9edbc30b AB |
2137 | if (try_module_get(work->mport->nscan->owner)) { |
2138 | work->mport->nscan->discover(work->mport, 0); | |
2139 | module_put(work->mport->nscan->owner); | |
2140 | } | |
005842ef AB |
2141 | } |
2142 | ||
305c891e | 2143 | int rio_init_mports(void) |
394b701c | 2144 | { |
394b701c | 2145 | struct rio_mport *port; |
005842ef | 2146 | struct rio_disc_work *work; |
2574740d AB |
2147 | int n = 0; |
2148 | ||
2149 | if (!next_portid) | |
2150 | return -ENODEV; | |
394b701c | 2151 | |
2574740d AB |
2152 | /* |
2153 | * First, run enumerations and check if we need to perform discovery | |
2154 | * on any of the registered mports. | |
2155 | */ | |
a11650e1 | 2156 | mutex_lock(&rio_mport_list_lock); |
394b701c | 2157 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 2158 | if (port->host_deviceid >= 0) { |
9edbc30b | 2159 | if (port->nscan && try_module_get(port->nscan->owner)) { |
bc8fcfea | 2160 | port->nscan->enumerate(port, 0); |
9edbc30b AB |
2161 | module_put(port->nscan->owner); |
2162 | } | |
a11650e1 | 2163 | } else |
2574740d AB |
2164 | n++; |
2165 | } | |
a11650e1 | 2166 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
2167 | |
2168 | if (!n) | |
2169 | goto no_disc; | |
2170 | ||
2171 | /* | |
2172 | * If we have mports that require discovery schedule a discovery work | |
2173 | * for each of them. If the code below fails to allocate needed | |
2174 | * resources, exit without error to keep results of enumeration | |
2175 | * process (if any). | |
9edbc30b | 2176 | * TODO: Implement restart of discovery process for all or |
2574740d AB |
2177 | * individual discovering mports. |
2178 | */ | |
2179 | rio_wq = alloc_workqueue("riodisc", 0, 0); | |
2180 | if (!rio_wq) { | |
2181 | pr_err("RIO: unable allocate rio_wq\n"); | |
2182 | goto no_disc; | |
005842ef AB |
2183 | } |
2184 | ||
2574740d AB |
2185 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
2186 | if (!work) { | |
005842ef | 2187 | destroy_workqueue(rio_wq); |
2574740d | 2188 | goto no_disc; |
394b701c MP |
2189 | } |
2190 | ||
2574740d | 2191 | n = 0; |
a11650e1 | 2192 | mutex_lock(&rio_mport_list_lock); |
2574740d | 2193 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 2194 | if (port->host_deviceid < 0 && port->nscan) { |
2574740d AB |
2195 | work[n].mport = port; |
2196 | INIT_WORK(&work[n].work, disc_work_handler); | |
2197 | queue_work(rio_wq, &work[n].work); | |
2198 | n++; | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | flush_workqueue(rio_wq); | |
9edbc30b | 2203 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
2204 | pr_debug("RIO: destroy discovery workqueue\n"); |
2205 | destroy_workqueue(rio_wq); | |
2206 | kfree(work); | |
2207 | ||
2208 | no_disc: | |
2f809985 AB |
2209 | rio_init(); |
2210 | ||
c1256ebe | 2211 | return 0; |
394b701c | 2212 | } |
4ba61eca | 2213 | EXPORT_SYMBOL_GPL(rio_init_mports); |
394b701c | 2214 | |
569fccb6 AB |
2215 | static int rio_get_hdid(int index) |
2216 | { | |
fdf90abc | 2217 | if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS) |
569fccb6 AB |
2218 | return -1; |
2219 | ||
fdf90abc | 2220 | return hdid[index]; |
569fccb6 AB |
2221 | } |
2222 | ||
b77a2030 | 2223 | int rio_mport_initialize(struct rio_mport *mport) |
394b701c | 2224 | { |
569fccb6 AB |
2225 | if (next_portid >= RIO_MAX_MPORTS) { |
2226 | pr_err("RIO: reached specified max number of mports\n"); | |
b77a2030 | 2227 | return -ENODEV; |
569fccb6 AB |
2228 | } |
2229 | ||
b77a2030 AB |
2230 | atomic_set(&mport->state, RIO_DEVICE_INITIALIZING); |
2231 | mport->id = next_portid++; | |
2232 | mport->host_deviceid = rio_get_hdid(mport->id); | |
2233 | mport->nscan = NULL; | |
a7b4c636 | 2234 | mutex_init(&mport->lock); |
b6cb95e8 | 2235 | mport->pwe_refcnt = 0; |
9a0b0627 | 2236 | INIT_LIST_HEAD(&mport->pwrites); |
9edbc30b | 2237 | |
b77a2030 AB |
2238 | return 0; |
2239 | } | |
2240 | EXPORT_SYMBOL_GPL(rio_mport_initialize); | |
2aaf308b | 2241 | |
b77a2030 AB |
2242 | int rio_register_mport(struct rio_mport *port) |
2243 | { | |
2244 | struct rio_scan_node *scan = NULL; | |
2245 | int res = 0; | |
2aaf308b | 2246 | |
a11650e1 | 2247 | mutex_lock(&rio_mport_list_lock); |
9edbc30b AB |
2248 | |
2249 | /* | |
2250 | * Check if there are any registered enumeration/discovery operations | |
2251 | * that have to be attached to the added mport. | |
2252 | */ | |
2253 | list_for_each_entry(scan, &rio_scans, node) { | |
2254 | if (port->id == scan->mport_id || | |
2255 | scan->mport_id == RIO_MPORT_ANY) { | |
2256 | port->nscan = scan->ops; | |
2257 | if (port->id == scan->mport_id) | |
2258 | break; | |
2259 | } | |
2260 | } | |
b77a2030 AB |
2261 | |
2262 | list_add_tail(&port->node, &rio_mports); | |
a11650e1 | 2263 | mutex_unlock(&rio_mport_list_lock); |
9edbc30b | 2264 | |
b77a2030 AB |
2265 | dev_set_name(&port->dev, "rapidio%d", port->id); |
2266 | port->dev.class = &rio_mport_class; | |
2267 | atomic_set(&port->state, RIO_DEVICE_RUNNING); | |
2268 | ||
2269 | res = device_register(&port->dev); | |
2270 | if (res) | |
2271 | dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n", | |
2272 | port->id, res); | |
2273 | else | |
2274 | dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id); | |
2275 | ||
2276 | return res; | |
2277 | } | |
2278 | EXPORT_SYMBOL_GPL(rio_register_mport); | |
2279 | ||
2280 | static int rio_mport_cleanup_callback(struct device *dev, void *data) | |
2281 | { | |
2282 | struct rio_dev *rdev = to_rio_dev(dev); | |
2283 | ||
2284 | if (dev->bus == &rio_bus_type) | |
2285 | rio_del_device(rdev, RIO_DEVICE_SHUTDOWN); | |
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | static int rio_net_remove_children(struct rio_net *net) | |
2290 | { | |
2291 | /* | |
2292 | * Unregister all RapidIO devices residing on this net (this will | |
2293 | * invoke notification of registered subsystem interfaces as well). | |
2294 | */ | |
2295 | device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback); | |
2296 | return 0; | |
2297 | } | |
2298 | ||
2299 | int rio_unregister_mport(struct rio_mport *port) | |
2300 | { | |
9edbc30b | 2301 | pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id); |
b77a2030 AB |
2302 | |
2303 | /* Transition mport to the SHUTDOWN state */ | |
2304 | if (atomic_cmpxchg(&port->state, | |
2305 | RIO_DEVICE_RUNNING, | |
2306 | RIO_DEVICE_SHUTDOWN) != RIO_DEVICE_RUNNING) { | |
2307 | pr_err("RIO: %s unexpected state transition for mport %s\n", | |
2308 | __func__, port->name); | |
2309 | } | |
2310 | ||
2311 | if (port->net && port->net->hport == port) { | |
2312 | rio_net_remove_children(port->net); | |
2313 | rio_free_net(port->net); | |
2314 | } | |
2315 | ||
2316 | /* | |
2317 | * Unregister all RapidIO devices attached to this mport (this will | |
2318 | * invoke notification of registered subsystem interfaces as well). | |
2319 | */ | |
2320 | mutex_lock(&rio_mport_list_lock); | |
2321 | list_del(&port->node); | |
2322 | mutex_unlock(&rio_mport_list_lock); | |
2323 | device_unregister(&port->dev); | |
2324 | ||
59f99965 | 2325 | return 0; |
394b701c | 2326 | } |
b77a2030 | 2327 | EXPORT_SYMBOL_GPL(rio_unregister_mport); |