Commit | Line | Data |
---|---|---|
394b701c MP |
1 | /* |
2 | * RapidIO interconnect services | |
3 | * (RapidIO Interconnect Specification, http://www.rapidio.org) | |
4 | * | |
5 | * Copyright 2005 MontaVista Software, Inc. | |
6 | * Matt Porter <mporter@kernel.crashing.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/kernel.h> | |
17 | ||
18 | #include <linux/delay.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/rio.h> | |
21 | #include <linux/rio_drv.h> | |
22 | #include <linux/rio_ids.h> | |
23 | #include <linux/rio_regs.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/spinlock.h> | |
26 | ||
27 | #include "rio.h" | |
28 | ||
29 | static LIST_HEAD(rio_mports); | |
30 | ||
31 | /** | |
32 | * rio_local_get_device_id - Get the base/extended device id for a port | |
33 | * @port: RIO master port from which to get the deviceid | |
34 | * | |
35 | * Reads the base/extended device id from the local device | |
36 | * implementing the master port. Returns the 8/16-bit device | |
37 | * id. | |
38 | */ | |
39 | u16 rio_local_get_device_id(struct rio_mport *port) | |
40 | { | |
41 | u32 result; | |
42 | ||
43 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
44 | ||
45 | return (RIO_GET_DID(result)); | |
46 | } | |
47 | ||
48 | /** | |
49 | * rio_request_inb_mbox - request inbound mailbox service | |
50 | * @mport: RIO master port from which to allocate the mailbox resource | |
51 | * @mbox: Mailbox number to claim | |
52 | * @entries: Number of entries in inbound mailbox queue | |
53 | * @minb: Callback to execute when inbound message is received | |
54 | * | |
55 | * Requests ownership of an inbound mailbox resource and binds | |
56 | * a callback function to the resource. Returns %0 on success. | |
57 | */ | |
58 | int rio_request_inb_mbox(struct rio_mport *mport, | |
59 | int mbox, | |
60 | int entries, | |
61 | void (*minb) (struct rio_mport * mport, int mbox, | |
62 | int slot)) | |
63 | { | |
64 | int rc = 0; | |
65 | ||
66 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
67 | ||
68 | if (res) { | |
69 | rio_init_mbox_res(res, mbox, mbox); | |
70 | ||
71 | /* Make sure this mailbox isn't in use */ | |
72 | if ((rc = | |
73 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
74 | res)) < 0) { | |
75 | kfree(res); | |
76 | goto out; | |
77 | } | |
78 | ||
79 | mport->inb_msg[mbox].res = res; | |
80 | ||
81 | /* Hook the inbound message callback */ | |
82 | mport->inb_msg[mbox].mcback = minb; | |
83 | ||
84 | rc = rio_open_inb_mbox(mport, mbox, entries); | |
85 | } else | |
86 | rc = -ENOMEM; | |
87 | ||
88 | out: | |
89 | return rc; | |
90 | } | |
91 | ||
92 | /** | |
93 | * rio_release_inb_mbox - release inbound mailbox message service | |
94 | * @mport: RIO master port from which to release the mailbox resource | |
95 | * @mbox: Mailbox number to release | |
96 | * | |
97 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
98 | * if the request has been satisfied. | |
99 | */ | |
100 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
101 | { | |
102 | rio_close_inb_mbox(mport, mbox); | |
103 | ||
104 | /* Release the mailbox resource */ | |
105 | return release_resource(mport->inb_msg[mbox].res); | |
106 | } | |
107 | ||
108 | /** | |
109 | * rio_request_outb_mbox - request outbound mailbox service | |
110 | * @mport: RIO master port from which to allocate the mailbox resource | |
111 | * @mbox: Mailbox number to claim | |
112 | * @entries: Number of entries in outbound mailbox queue | |
113 | * @moutb: Callback to execute when outbound message is sent | |
114 | * | |
115 | * Requests ownership of an outbound mailbox resource and binds | |
116 | * a callback function to the resource. Returns 0 on success. | |
117 | */ | |
118 | int rio_request_outb_mbox(struct rio_mport *mport, | |
119 | int mbox, | |
120 | int entries, | |
121 | void (*moutb) (struct rio_mport * mport, int mbox, | |
122 | int slot)) | |
123 | { | |
124 | int rc = 0; | |
125 | ||
126 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
127 | ||
128 | if (res) { | |
129 | rio_init_mbox_res(res, mbox, mbox); | |
130 | ||
131 | /* Make sure this outbound mailbox isn't in use */ | |
132 | if ((rc = | |
133 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
134 | res)) < 0) { | |
135 | kfree(res); | |
136 | goto out; | |
137 | } | |
138 | ||
139 | mport->outb_msg[mbox].res = res; | |
140 | ||
141 | /* Hook the inbound message callback */ | |
142 | mport->outb_msg[mbox].mcback = moutb; | |
143 | ||
144 | rc = rio_open_outb_mbox(mport, mbox, entries); | |
145 | } else | |
146 | rc = -ENOMEM; | |
147 | ||
148 | out: | |
149 | return rc; | |
150 | } | |
151 | ||
152 | /** | |
153 | * rio_release_outb_mbox - release outbound mailbox message service | |
154 | * @mport: RIO master port from which to release the mailbox resource | |
155 | * @mbox: Mailbox number to release | |
156 | * | |
157 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
158 | * if the request has been satisfied. | |
159 | */ | |
160 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
161 | { | |
162 | rio_close_outb_mbox(mport, mbox); | |
163 | ||
164 | /* Release the mailbox resource */ | |
165 | return release_resource(mport->outb_msg[mbox].res); | |
166 | } | |
167 | ||
168 | /** | |
169 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
170 | * @mport: RIO master port to bind the doorbell callback | |
171 | * @res: Doorbell message resource | |
172 | * @dinb: Callback to execute when doorbell is received | |
173 | * | |
174 | * Adds a doorbell resource/callback pair into a port's | |
175 | * doorbell event list. Returns 0 if the request has been | |
176 | * satisfied. | |
177 | */ | |
178 | static int | |
179 | rio_setup_inb_dbell(struct rio_mport *mport, struct resource *res, | |
180 | void (*dinb) (struct rio_mport * mport, u16 src, u16 dst, | |
181 | u16 info)) | |
182 | { | |
183 | int rc = 0; | |
184 | struct rio_dbell *dbell; | |
185 | ||
186 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
187 | rc = -ENOMEM; | |
188 | goto out; | |
189 | } | |
190 | ||
191 | dbell->res = res; | |
192 | dbell->dinb = dinb; | |
193 | ||
194 | list_add_tail(&dbell->node, &mport->dbells); | |
195 | ||
196 | out: | |
197 | return rc; | |
198 | } | |
199 | ||
200 | /** | |
201 | * rio_request_inb_dbell - request inbound doorbell message service | |
202 | * @mport: RIO master port from which to allocate the doorbell resource | |
203 | * @start: Doorbell info range start | |
204 | * @end: Doorbell info range end | |
205 | * @dinb: Callback to execute when doorbell is received | |
206 | * | |
207 | * Requests ownership of an inbound doorbell resource and binds | |
208 | * a callback function to the resource. Returns 0 if the request | |
209 | * has been satisfied. | |
210 | */ | |
211 | int rio_request_inb_dbell(struct rio_mport *mport, | |
212 | u16 start, | |
213 | u16 end, | |
214 | void (*dinb) (struct rio_mport * mport, u16 src, | |
215 | u16 dst, u16 info)) | |
216 | { | |
217 | int rc = 0; | |
218 | ||
219 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
220 | ||
221 | if (res) { | |
222 | rio_init_dbell_res(res, start, end); | |
223 | ||
224 | /* Make sure these doorbells aren't in use */ | |
225 | if ((rc = | |
226 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
227 | res)) < 0) { | |
228 | kfree(res); | |
229 | goto out; | |
230 | } | |
231 | ||
232 | /* Hook the doorbell callback */ | |
233 | rc = rio_setup_inb_dbell(mport, res, dinb); | |
234 | } else | |
235 | rc = -ENOMEM; | |
236 | ||
237 | out: | |
238 | return rc; | |
239 | } | |
240 | ||
241 | /** | |
242 | * rio_release_inb_dbell - release inbound doorbell message service | |
243 | * @mport: RIO master port from which to release the doorbell resource | |
244 | * @start: Doorbell info range start | |
245 | * @end: Doorbell info range end | |
246 | * | |
247 | * Releases ownership of an inbound doorbell resource and removes | |
248 | * callback from the doorbell event list. Returns 0 if the request | |
249 | * has been satisfied. | |
250 | */ | |
251 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
252 | { | |
253 | int rc = 0, found = 0; | |
254 | struct rio_dbell *dbell; | |
255 | ||
256 | list_for_each_entry(dbell, &mport->dbells, node) { | |
257 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
258 | found = 1; | |
259 | break; | |
260 | } | |
261 | } | |
262 | ||
263 | /* If we can't find an exact match, fail */ | |
264 | if (!found) { | |
265 | rc = -EINVAL; | |
266 | goto out; | |
267 | } | |
268 | ||
269 | /* Delete from list */ | |
270 | list_del(&dbell->node); | |
271 | ||
272 | /* Release the doorbell resource */ | |
273 | rc = release_resource(dbell->res); | |
274 | ||
275 | /* Free the doorbell event */ | |
276 | kfree(dbell); | |
277 | ||
278 | out: | |
279 | return rc; | |
280 | } | |
281 | ||
282 | /** | |
283 | * rio_request_outb_dbell - request outbound doorbell message range | |
284 | * @rdev: RIO device from which to allocate the doorbell resource | |
285 | * @start: Doorbell message range start | |
286 | * @end: Doorbell message range end | |
287 | * | |
288 | * Requests ownership of a doorbell message range. Returns a resource | |
289 | * if the request has been satisfied or %NULL on failure. | |
290 | */ | |
291 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
292 | u16 end) | |
293 | { | |
294 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
295 | ||
296 | if (res) { | |
297 | rio_init_dbell_res(res, start, end); | |
298 | ||
299 | /* Make sure these doorbells aren't in use */ | |
300 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
301 | < 0) { | |
302 | kfree(res); | |
303 | res = NULL; | |
304 | } | |
305 | } | |
306 | ||
307 | return res; | |
308 | } | |
309 | ||
310 | /** | |
311 | * rio_release_outb_dbell - release outbound doorbell message range | |
312 | * @rdev: RIO device from which to release the doorbell resource | |
313 | * @res: Doorbell resource to be freed | |
314 | * | |
315 | * Releases ownership of a doorbell message range. Returns 0 if the | |
316 | * request has been satisfied. | |
317 | */ | |
318 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
319 | { | |
320 | int rc = release_resource(res); | |
321 | ||
322 | kfree(res); | |
323 | ||
324 | return rc; | |
325 | } | |
326 | ||
327 | /** | |
328 | * rio_mport_get_feature - query for devices' extended features | |
329 | * @port: Master port to issue transaction | |
330 | * @local: Indicate a local master port or remote device access | |
331 | * @destid: Destination ID of the device | |
332 | * @hopcount: Number of switch hops to the device | |
333 | * @ftr: Extended feature code | |
334 | * | |
335 | * Tell if a device supports a given RapidIO capability. | |
336 | * Returns the offset of the requested extended feature | |
337 | * block within the device's RIO configuration space or | |
338 | * 0 in case the device does not support it. Possible | |
339 | * values for @ftr: | |
340 | * | |
341 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
342 | * | |
343 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
344 | * | |
345 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
346 | * | |
347 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
348 | * | |
349 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
350 | * | |
351 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
352 | */ | |
353 | u32 | |
354 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
355 | u8 hopcount, int ftr) | |
356 | { | |
357 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
358 | ||
359 | if (local) | |
360 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
361 | else | |
362 | rio_mport_read_config_32(port, destid, hopcount, | |
363 | RIO_ASM_INFO_CAR, &asm_info); | |
364 | ||
365 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
366 | ||
367 | while (ext_ftr_ptr) { | |
368 | if (local) | |
369 | rio_local_read_config_32(port, ext_ftr_ptr, | |
370 | &ftr_header); | |
371 | else | |
372 | rio_mport_read_config_32(port, destid, hopcount, | |
373 | ext_ftr_ptr, &ftr_header); | |
374 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
375 | return ext_ftr_ptr; | |
376 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
377 | break; | |
378 | } | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | /** | |
384 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
385 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
386 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
387 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
388 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
389 | * @from: Previous RIO device found in search, or %NULL for new search | |
390 | * | |
391 | * Iterates through the list of known RIO devices. If a RIO device is | |
392 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
393 | * count to the device is incrememted and a pointer to its device | |
394 | * structure is returned. Otherwise, %NULL is returned. A new search | |
395 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
396 | * @from is not %NULL, searches continue from next device on the global | |
397 | * list. The reference count for @from is always decremented if it is | |
398 | * not %NULL. | |
399 | */ | |
400 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
401 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
402 | { | |
403 | struct list_head *n; | |
404 | struct rio_dev *rdev; | |
405 | ||
406 | WARN_ON(in_interrupt()); | |
407 | spin_lock(&rio_global_list_lock); | |
408 | n = from ? from->global_list.next : rio_devices.next; | |
409 | ||
410 | while (n && (n != &rio_devices)) { | |
411 | rdev = rio_dev_g(n); | |
412 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
413 | (did == RIO_ANY_ID || rdev->did == did) && | |
414 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
415 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
416 | goto exit; | |
417 | n = n->next; | |
418 | } | |
419 | rdev = NULL; | |
420 | exit: | |
421 | rio_dev_put(from); | |
422 | rdev = rio_dev_get(rdev); | |
423 | spin_unlock(&rio_global_list_lock); | |
424 | return rdev; | |
425 | } | |
426 | ||
427 | /** | |
428 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
429 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
430 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
431 | * @from: Previous RIO device found in search, or %NULL for new search | |
432 | * | |
433 | * Iterates through the list of known RIO devices. If a RIO device is | |
434 | * found with a matching @vid and @did, the reference count to the | |
435 | * device is incrememted and a pointer to its device structure is returned. | |
436 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
437 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
438 | * continue from next device on the global list. The reference count for | |
439 | * @from is always decremented if it is not %NULL. | |
440 | */ | |
441 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
442 | { | |
443 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
444 | } | |
445 | ||
446 | static void rio_fixup_device(struct rio_dev *dev) | |
447 | { | |
448 | } | |
449 | ||
450 | static int __devinit rio_init(void) | |
451 | { | |
452 | struct rio_dev *dev = NULL; | |
453 | ||
454 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
455 | rio_fixup_device(dev); | |
456 | } | |
457 | return 0; | |
458 | } | |
459 | ||
460 | device_initcall(rio_init); | |
461 | ||
462 | int rio_init_mports(void) | |
463 | { | |
464 | int rc = 0; | |
465 | struct rio_mport *port; | |
466 | ||
467 | list_for_each_entry(port, &rio_mports, node) { | |
468 | if (!request_mem_region(port->iores.start, | |
469 | port->iores.end - port->iores.start, | |
470 | port->name)) { | |
471 | printk(KERN_ERR | |
472 | "RIO: Error requesting master port region %8.8lx-%8.8lx\n", | |
473 | port->iores.start, port->iores.end - 1); | |
474 | rc = -ENOMEM; | |
475 | goto out; | |
476 | } | |
477 | ||
478 | if (port->host_deviceid >= 0) | |
479 | rio_enum_mport(port); | |
480 | else | |
481 | rio_disc_mport(port); | |
482 | } | |
483 | ||
484 | out: | |
485 | return rc; | |
486 | } | |
487 | ||
488 | void rio_register_mport(struct rio_mport *port) | |
489 | { | |
490 | list_add_tail(&port->node, &rio_mports); | |
491 | } | |
492 | ||
493 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
494 | EXPORT_SYMBOL_GPL(rio_get_device); | |
495 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
496 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
497 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
498 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
499 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
500 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
501 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
502 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
503 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |