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2356f4cb MS |
1 | /* |
2 | * IUCV base infrastructure. | |
3 | * | |
4 | * Copyright 2001, 2006 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
5 | * Author(s): | |
6 | * Original source: | |
7 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
8 | * Xenia Tkatschow (xenia@us.ibm.com) | |
9 | * 2Gb awareness and general cleanup: | |
10 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
11 | * Rewritten for af_iucv: | |
12 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
13 | * | |
14 | * Documentation used: | |
15 | * The original source | |
16 | * CP Programming Service, IBM document # SC24-5760 | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2, or (at your option) | |
21 | * any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/moduleparam.h> | |
35 | ||
36 | #include <linux/spinlock.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/list.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/err.h> | |
44 | #include <linux/device.h> | |
45 | #include <linux/cpu.h> | |
46 | #include <net/iucv/iucv.h> | |
47 | #include <asm/atomic.h> | |
48 | #include <asm/ebcdic.h> | |
49 | #include <asm/io.h> | |
50 | #include <asm/s390_ext.h> | |
51 | #include <asm/s390_rdev.h> | |
52 | #include <asm/smp.h> | |
53 | ||
54 | /* | |
55 | * FLAGS: | |
56 | * All flags are defined in the field IPFLAGS1 of each function | |
57 | * and can be found in CP Programming Services. | |
58 | * IPSRCCLS - Indicates you have specified a source class. | |
59 | * IPTRGCLS - Indicates you have specified a target class. | |
60 | * IPFGPID - Indicates you have specified a pathid. | |
61 | * IPFGMID - Indicates you have specified a message ID. | |
62 | * IPNORPY - Indicates a one-way message. No reply expected. | |
63 | * IPALL - Indicates that all paths are affected. | |
64 | */ | |
65 | #define IUCV_IPSRCCLS 0x01 | |
66 | #define IUCV_IPTRGCLS 0x01 | |
67 | #define IUCV_IPFGPID 0x02 | |
68 | #define IUCV_IPFGMID 0x04 | |
69 | #define IUCV_IPNORPY 0x10 | |
70 | #define IUCV_IPALL 0x80 | |
71 | ||
72 | static int iucv_bus_match (struct device *dev, struct device_driver *drv) | |
73 | { | |
74 | return 0; | |
75 | } | |
76 | ||
77 | struct bus_type iucv_bus = { | |
78 | .name = "iucv", | |
79 | .match = iucv_bus_match, | |
80 | }; | |
81 | ||
82 | struct device *iucv_root; | |
83 | static int iucv_available; | |
84 | ||
85 | /* General IUCV interrupt structure */ | |
86 | struct iucv_irq_data { | |
87 | u16 ippathid; | |
88 | u8 ipflags1; | |
89 | u8 iptype; | |
90 | u32 res2[8]; | |
91 | }; | |
92 | ||
04b090d5 | 93 | struct iucv_irq_list { |
2356f4cb MS |
94 | struct list_head list; |
95 | struct iucv_irq_data data; | |
96 | }; | |
97 | ||
2356f4cb MS |
98 | static struct iucv_irq_data *iucv_irq_data; |
99 | static cpumask_t iucv_buffer_cpumask = CPU_MASK_NONE; | |
100 | static cpumask_t iucv_irq_cpumask = CPU_MASK_NONE; | |
101 | ||
04b090d5 MS |
102 | /* |
103 | * Queue of interrupt buffers lock for delivery via the tasklet | |
104 | * (fast but can't call smp_call_function). | |
105 | */ | |
106 | static LIST_HEAD(iucv_task_queue); | |
107 | ||
108 | /* | |
109 | * The tasklet for fast delivery of iucv interrupts. | |
110 | */ | |
111 | static void iucv_tasklet_fn(unsigned long); | |
112 | static DECLARE_TASKLET(iucv_tasklet, iucv_tasklet_fn,0); | |
113 | ||
114 | /* | |
115 | * Queue of interrupt buffers for delivery via a work queue | |
116 | * (slower but can call smp_call_function). | |
117 | */ | |
118 | static LIST_HEAD(iucv_work_queue); | |
119 | ||
120 | /* | |
121 | * The work element to deliver path pending interrupts. | |
122 | */ | |
123 | static void iucv_work_fn(struct work_struct *work); | |
124 | static DECLARE_WORK(iucv_work, iucv_work_fn); | |
125 | ||
126 | /* | |
127 | * Spinlock protecting task and work queue. | |
128 | */ | |
129 | static DEFINE_SPINLOCK(iucv_queue_lock); | |
2356f4cb MS |
130 | |
131 | enum iucv_command_codes { | |
132 | IUCV_QUERY = 0, | |
133 | IUCV_RETRIEVE_BUFFER = 2, | |
134 | IUCV_SEND = 4, | |
135 | IUCV_RECEIVE = 5, | |
136 | IUCV_REPLY = 6, | |
137 | IUCV_REJECT = 8, | |
138 | IUCV_PURGE = 9, | |
139 | IUCV_ACCEPT = 10, | |
140 | IUCV_CONNECT = 11, | |
141 | IUCV_DECLARE_BUFFER = 12, | |
142 | IUCV_QUIESCE = 13, | |
143 | IUCV_RESUME = 14, | |
144 | IUCV_SEVER = 15, | |
145 | IUCV_SETMASK = 16, | |
146 | }; | |
147 | ||
148 | /* | |
149 | * Error messages that are used with the iucv_sever function. They get | |
150 | * converted to EBCDIC. | |
151 | */ | |
152 | static char iucv_error_no_listener[16] = "NO LISTENER"; | |
153 | static char iucv_error_no_memory[16] = "NO MEMORY"; | |
154 | static char iucv_error_pathid[16] = "INVALID PATHID"; | |
155 | ||
156 | /* | |
157 | * iucv_handler_list: List of registered handlers. | |
158 | */ | |
159 | static LIST_HEAD(iucv_handler_list); | |
160 | ||
161 | /* | |
162 | * iucv_path_table: an array of iucv_path structures. | |
163 | */ | |
164 | static struct iucv_path **iucv_path_table; | |
165 | static unsigned long iucv_max_pathid; | |
166 | ||
167 | /* | |
168 | * iucv_lock: spinlock protecting iucv_handler_list and iucv_pathid_table | |
169 | */ | |
170 | static DEFINE_SPINLOCK(iucv_table_lock); | |
171 | ||
172 | /* | |
04b090d5 MS |
173 | * iucv_active_cpu: contains the number of the cpu executing the tasklet |
174 | * or the work handler. Needed for iucv_path_sever called from tasklet. | |
2356f4cb | 175 | */ |
04b090d5 | 176 | static int iucv_active_cpu = -1; |
2356f4cb MS |
177 | |
178 | /* | |
179 | * Mutex and wait queue for iucv_register/iucv_unregister. | |
180 | */ | |
181 | static DEFINE_MUTEX(iucv_register_mutex); | |
182 | ||
183 | /* | |
184 | * Counter for number of non-smp capable handlers. | |
185 | */ | |
186 | static int iucv_nonsmp_handler; | |
187 | ||
188 | /* | |
189 | * IUCV control data structure. Used by iucv_path_accept, iucv_path_connect, | |
190 | * iucv_path_quiesce and iucv_path_sever. | |
191 | */ | |
192 | struct iucv_cmd_control { | |
193 | u16 ippathid; | |
194 | u8 ipflags1; | |
195 | u8 iprcode; | |
196 | u16 ipmsglim; | |
197 | u16 res1; | |
198 | u8 ipvmid[8]; | |
199 | u8 ipuser[16]; | |
200 | u8 iptarget[8]; | |
201 | } __attribute__ ((packed,aligned(8))); | |
202 | ||
203 | /* | |
204 | * Data in parameter list iucv structure. Used by iucv_message_send, | |
205 | * iucv_message_send2way and iucv_message_reply. | |
206 | */ | |
207 | struct iucv_cmd_dpl { | |
208 | u16 ippathid; | |
209 | u8 ipflags1; | |
210 | u8 iprcode; | |
211 | u32 ipmsgid; | |
212 | u32 iptrgcls; | |
213 | u8 iprmmsg[8]; | |
214 | u32 ipsrccls; | |
215 | u32 ipmsgtag; | |
216 | u32 ipbfadr2; | |
217 | u32 ipbfln2f; | |
218 | u32 res; | |
219 | } __attribute__ ((packed,aligned(8))); | |
220 | ||
221 | /* | |
222 | * Data in buffer iucv structure. Used by iucv_message_receive, | |
223 | * iucv_message_reject, iucv_message_send, iucv_message_send2way | |
224 | * and iucv_declare_cpu. | |
225 | */ | |
226 | struct iucv_cmd_db { | |
227 | u16 ippathid; | |
228 | u8 ipflags1; | |
229 | u8 iprcode; | |
230 | u32 ipmsgid; | |
231 | u32 iptrgcls; | |
232 | u32 ipbfadr1; | |
233 | u32 ipbfln1f; | |
234 | u32 ipsrccls; | |
235 | u32 ipmsgtag; | |
236 | u32 ipbfadr2; | |
237 | u32 ipbfln2f; | |
238 | u32 res; | |
239 | } __attribute__ ((packed,aligned(8))); | |
240 | ||
241 | /* | |
242 | * Purge message iucv structure. Used by iucv_message_purge. | |
243 | */ | |
244 | struct iucv_cmd_purge { | |
245 | u16 ippathid; | |
246 | u8 ipflags1; | |
247 | u8 iprcode; | |
248 | u32 ipmsgid; | |
249 | u8 ipaudit[3]; | |
250 | u8 res1[5]; | |
251 | u32 res2; | |
252 | u32 ipsrccls; | |
253 | u32 ipmsgtag; | |
254 | u32 res3[3]; | |
255 | } __attribute__ ((packed,aligned(8))); | |
256 | ||
257 | /* | |
258 | * Set mask iucv structure. Used by iucv_enable_cpu. | |
259 | */ | |
260 | struct iucv_cmd_set_mask { | |
261 | u8 ipmask; | |
262 | u8 res1[2]; | |
263 | u8 iprcode; | |
264 | u32 res2[9]; | |
265 | } __attribute__ ((packed,aligned(8))); | |
266 | ||
267 | union iucv_param { | |
268 | struct iucv_cmd_control ctrl; | |
269 | struct iucv_cmd_dpl dpl; | |
270 | struct iucv_cmd_db db; | |
271 | struct iucv_cmd_purge purge; | |
272 | struct iucv_cmd_set_mask set_mask; | |
273 | }; | |
274 | ||
275 | /* | |
276 | * Anchor for per-cpu IUCV command parameter block. | |
277 | */ | |
278 | static union iucv_param *iucv_param; | |
279 | ||
280 | /** | |
281 | * iucv_call_b2f0 | |
282 | * @code: identifier of IUCV call to CP. | |
283 | * @parm: pointer to a struct iucv_parm block | |
284 | * | |
285 | * Calls CP to execute IUCV commands. | |
286 | * | |
287 | * Returns the result of the CP IUCV call. | |
288 | */ | |
289 | static inline int iucv_call_b2f0(int command, union iucv_param *parm) | |
290 | { | |
291 | register unsigned long reg0 asm ("0"); | |
292 | register unsigned long reg1 asm ("1"); | |
293 | int ccode; | |
294 | ||
295 | reg0 = command; | |
296 | reg1 = virt_to_phys(parm); | |
297 | asm volatile( | |
298 | " .long 0xb2f01000\n" | |
299 | " ipm %0\n" | |
300 | " srl %0,28\n" | |
301 | : "=d" (ccode), "=m" (*parm), "+d" (reg0), "+a" (reg1) | |
302 | : "m" (*parm) : "cc"); | |
303 | return (ccode == 1) ? parm->ctrl.iprcode : ccode; | |
304 | } | |
305 | ||
306 | /** | |
307 | * iucv_query_maxconn | |
308 | * | |
309 | * Determines the maximum number of connections that may be established. | |
310 | * | |
311 | * Returns the maximum number of connections or -EPERM is IUCV is not | |
312 | * available. | |
313 | */ | |
314 | static int iucv_query_maxconn(void) | |
315 | { | |
316 | register unsigned long reg0 asm ("0"); | |
317 | register unsigned long reg1 asm ("1"); | |
318 | void *param; | |
319 | int ccode; | |
320 | ||
321 | param = kzalloc(sizeof(union iucv_param), GFP_KERNEL|GFP_DMA); | |
322 | if (!param) | |
323 | return -ENOMEM; | |
324 | reg0 = IUCV_QUERY; | |
325 | reg1 = (unsigned long) param; | |
326 | asm volatile ( | |
327 | " .long 0xb2f01000\n" | |
328 | " ipm %0\n" | |
329 | " srl %0,28\n" | |
330 | : "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc"); | |
331 | if (ccode == 0) | |
332 | iucv_max_pathid = reg0; | |
333 | kfree(param); | |
334 | return ccode ? -EPERM : 0; | |
335 | } | |
336 | ||
337 | /** | |
338 | * iucv_allow_cpu | |
339 | * @data: unused | |
340 | * | |
341 | * Allow iucv interrupts on this cpu. | |
342 | */ | |
343 | static void iucv_allow_cpu(void *data) | |
344 | { | |
345 | int cpu = smp_processor_id(); | |
346 | union iucv_param *parm; | |
347 | ||
348 | /* | |
349 | * Enable all iucv interrupts. | |
350 | * ipmask contains bits for the different interrupts | |
351 | * 0x80 - Flag to allow nonpriority message pending interrupts | |
352 | * 0x40 - Flag to allow priority message pending interrupts | |
353 | * 0x20 - Flag to allow nonpriority message completion interrupts | |
354 | * 0x10 - Flag to allow priority message completion interrupts | |
355 | * 0x08 - Flag to allow IUCV control interrupts | |
356 | */ | |
357 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
358 | memset(parm, 0, sizeof(union iucv_param)); | |
359 | parm->set_mask.ipmask = 0xf8; | |
360 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
361 | ||
362 | /* Set indication that iucv interrupts are allowed for this cpu. */ | |
363 | cpu_set(cpu, iucv_irq_cpumask); | |
364 | } | |
365 | ||
366 | /** | |
367 | * iucv_block_cpu | |
368 | * @data: unused | |
369 | * | |
370 | * Block iucv interrupts on this cpu. | |
371 | */ | |
372 | static void iucv_block_cpu(void *data) | |
373 | { | |
374 | int cpu = smp_processor_id(); | |
375 | union iucv_param *parm; | |
376 | ||
377 | /* Disable all iucv interrupts. */ | |
378 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
379 | memset(parm, 0, sizeof(union iucv_param)); | |
380 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
381 | ||
382 | /* Clear indication that iucv interrupts are allowed for this cpu. */ | |
383 | cpu_clear(cpu, iucv_irq_cpumask); | |
384 | } | |
385 | ||
386 | /** | |
387 | * iucv_declare_cpu | |
388 | * @data: unused | |
389 | * | |
390 | * Declare a interupt buffer on this cpu. | |
391 | */ | |
392 | static void iucv_declare_cpu(void *data) | |
393 | { | |
394 | int cpu = smp_processor_id(); | |
395 | union iucv_param *parm; | |
396 | int rc; | |
397 | ||
398 | if (cpu_isset(cpu, iucv_buffer_cpumask)) | |
399 | return; | |
400 | ||
401 | /* Declare interrupt buffer. */ | |
402 | parm = percpu_ptr(iucv_param, cpu); | |
403 | memset(parm, 0, sizeof(union iucv_param)); | |
404 | parm->db.ipbfadr1 = virt_to_phys(percpu_ptr(iucv_irq_data, cpu)); | |
405 | rc = iucv_call_b2f0(IUCV_DECLARE_BUFFER, parm); | |
406 | if (rc) { | |
407 | char *err = "Unknown"; | |
408 | switch(rc) { | |
409 | case 0x03: | |
410 | err = "Directory error"; | |
411 | break; | |
412 | case 0x0a: | |
413 | err = "Invalid length"; | |
414 | break; | |
415 | case 0x13: | |
416 | err = "Buffer already exists"; | |
417 | break; | |
418 | case 0x3e: | |
419 | err = "Buffer overlap"; | |
420 | break; | |
421 | case 0x5c: | |
422 | err = "Paging or storage error"; | |
423 | break; | |
424 | } | |
425 | printk(KERN_WARNING "iucv_register: iucv_declare_buffer " | |
426 | "on cpu %i returned error 0x%02x (%s)\n", cpu, rc, err); | |
427 | return; | |
428 | } | |
429 | ||
430 | /* Set indication that an iucv buffer exists for this cpu. */ | |
431 | cpu_set(cpu, iucv_buffer_cpumask); | |
432 | ||
433 | if (iucv_nonsmp_handler == 0 || cpus_empty(iucv_irq_cpumask)) | |
434 | /* Enable iucv interrupts on this cpu. */ | |
435 | iucv_allow_cpu(NULL); | |
436 | else | |
437 | /* Disable iucv interrupts on this cpu. */ | |
438 | iucv_block_cpu(NULL); | |
439 | } | |
440 | ||
441 | /** | |
442 | * iucv_retrieve_cpu | |
443 | * @data: unused | |
444 | * | |
445 | * Retrieve interrupt buffer on this cpu. | |
446 | */ | |
447 | static void iucv_retrieve_cpu(void *data) | |
448 | { | |
449 | int cpu = smp_processor_id(); | |
450 | union iucv_param *parm; | |
451 | ||
452 | if (!cpu_isset(cpu, iucv_buffer_cpumask)) | |
453 | return; | |
454 | ||
455 | /* Block iucv interrupts. */ | |
456 | iucv_block_cpu(NULL); | |
457 | ||
458 | /* Retrieve interrupt buffer. */ | |
459 | parm = percpu_ptr(iucv_param, cpu); | |
460 | iucv_call_b2f0(IUCV_RETRIEVE_BUFFER, parm); | |
461 | ||
462 | /* Clear indication that an iucv buffer exists for this cpu. */ | |
463 | cpu_clear(cpu, iucv_buffer_cpumask); | |
464 | } | |
465 | ||
466 | /** | |
467 | * iucv_setmask_smp | |
468 | * | |
469 | * Allow iucv interrupts on all cpus. | |
470 | */ | |
471 | static void iucv_setmask_mp(void) | |
472 | { | |
473 | int cpu; | |
474 | ||
04b090d5 | 475 | preempt_disable(); |
2356f4cb MS |
476 | for_each_online_cpu(cpu) |
477 | /* Enable all cpus with a declared buffer. */ | |
478 | if (cpu_isset(cpu, iucv_buffer_cpumask) && | |
479 | !cpu_isset(cpu, iucv_irq_cpumask)) | |
480 | smp_call_function_on(iucv_allow_cpu, NULL, 0, 1, cpu); | |
04b090d5 | 481 | preempt_enable(); |
2356f4cb MS |
482 | } |
483 | ||
484 | /** | |
485 | * iucv_setmask_up | |
486 | * | |
04b090d5 | 487 | * Allow iucv interrupts on a single cpu. |
2356f4cb MS |
488 | */ |
489 | static void iucv_setmask_up(void) | |
490 | { | |
491 | cpumask_t cpumask; | |
492 | int cpu; | |
493 | ||
494 | /* Disable all cpu but the first in cpu_irq_cpumask. */ | |
495 | cpumask = iucv_irq_cpumask; | |
496 | cpu_clear(first_cpu(iucv_irq_cpumask), cpumask); | |
497 | for_each_cpu_mask(cpu, cpumask) | |
498 | smp_call_function_on(iucv_block_cpu, NULL, 0, 1, cpu); | |
499 | } | |
500 | ||
501 | /** | |
502 | * iucv_enable | |
503 | * | |
504 | * This function makes iucv ready for use. It allocates the pathid | |
505 | * table, declares an iucv interrupt buffer and enables the iucv | |
506 | * interrupts. Called when the first user has registered an iucv | |
507 | * handler. | |
508 | */ | |
509 | static int iucv_enable(void) | |
510 | { | |
511 | size_t alloc_size; | |
512 | int cpu, rc; | |
513 | ||
514 | rc = -ENOMEM; | |
515 | alloc_size = iucv_max_pathid * sizeof(struct iucv_path); | |
516 | iucv_path_table = kzalloc(alloc_size, GFP_KERNEL); | |
517 | if (!iucv_path_table) | |
518 | goto out; | |
519 | /* Declare per cpu buffers. */ | |
520 | rc = -EIO; | |
04b090d5 | 521 | preempt_disable(); |
2356f4cb MS |
522 | for_each_online_cpu(cpu) |
523 | smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu); | |
04b090d5 | 524 | preempt_enable(); |
2356f4cb MS |
525 | if (cpus_empty(iucv_buffer_cpumask)) |
526 | /* No cpu could declare an iucv buffer. */ | |
527 | goto out_path; | |
528 | return 0; | |
529 | ||
530 | out_path: | |
531 | kfree(iucv_path_table); | |
532 | out: | |
533 | return rc; | |
534 | } | |
535 | ||
536 | /** | |
537 | * iucv_disable | |
538 | * | |
539 | * This function shuts down iucv. It disables iucv interrupts, retrieves | |
540 | * the iucv interrupt buffer and frees the pathid table. Called after the | |
541 | * last user unregister its iucv handler. | |
542 | */ | |
543 | static void iucv_disable(void) | |
544 | { | |
545 | on_each_cpu(iucv_retrieve_cpu, NULL, 0, 1); | |
546 | kfree(iucv_path_table); | |
547 | } | |
548 | ||
2356f4cb MS |
549 | static int __cpuinit iucv_cpu_notify(struct notifier_block *self, |
550 | unsigned long action, void *hcpu) | |
551 | { | |
552 | cpumask_t cpumask; | |
553 | long cpu = (long) hcpu; | |
554 | ||
555 | switch (action) { | |
556 | case CPU_UP_PREPARE: | |
557 | if (!percpu_populate(iucv_irq_data, | |
558 | sizeof(struct iucv_irq_data), | |
559 | GFP_KERNEL|GFP_DMA, cpu)) | |
560 | return NOTIFY_BAD; | |
561 | if (!percpu_populate(iucv_param, sizeof(union iucv_param), | |
562 | GFP_KERNEL|GFP_DMA, cpu)) { | |
563 | percpu_depopulate(iucv_irq_data, cpu); | |
564 | return NOTIFY_BAD; | |
565 | } | |
566 | break; | |
567 | case CPU_UP_CANCELED: | |
568 | case CPU_DEAD: | |
569 | percpu_depopulate(iucv_param, cpu); | |
570 | percpu_depopulate(iucv_irq_data, cpu); | |
571 | break; | |
572 | case CPU_ONLINE: | |
573 | case CPU_DOWN_FAILED: | |
574 | smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu); | |
575 | break; | |
576 | case CPU_DOWN_PREPARE: | |
577 | cpumask = iucv_buffer_cpumask; | |
578 | cpu_clear(cpu, cpumask); | |
579 | if (cpus_empty(cpumask)) | |
580 | /* Can't offline last IUCV enabled cpu. */ | |
581 | return NOTIFY_BAD; | |
582 | smp_call_function_on(iucv_retrieve_cpu, NULL, 0, 1, cpu); | |
583 | if (cpus_empty(iucv_irq_cpumask)) | |
584 | smp_call_function_on(iucv_allow_cpu, NULL, 0, 1, | |
585 | first_cpu(iucv_buffer_cpumask)); | |
586 | break; | |
587 | } | |
588 | return NOTIFY_OK; | |
589 | } | |
590 | ||
591 | static struct notifier_block iucv_cpu_notifier = { | |
592 | .notifier_call = iucv_cpu_notify, | |
593 | }; | |
2356f4cb MS |
594 | |
595 | /** | |
596 | * iucv_sever_pathid | |
597 | * @pathid: path identification number. | |
598 | * @userdata: 16-bytes of user data. | |
599 | * | |
600 | * Sever an iucv path to free up the pathid. Used internally. | |
601 | */ | |
602 | static int iucv_sever_pathid(u16 pathid, u8 userdata[16]) | |
603 | { | |
604 | union iucv_param *parm; | |
605 | ||
606 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
607 | memset(parm, 0, sizeof(union iucv_param)); | |
608 | if (userdata) | |
609 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
610 | parm->ctrl.ippathid = pathid; | |
611 | return iucv_call_b2f0(IUCV_SEVER, parm); | |
612 | } | |
613 | ||
04b090d5 | 614 | #ifdef CONFIG_SMP |
2356f4cb | 615 | /** |
04b090d5 | 616 | * __iucv_cleanup_queue |
2356f4cb MS |
617 | * @dummy: unused dummy argument |
618 | * | |
619 | * Nop function called via smp_call_function to force work items from | |
620 | * pending external iucv interrupts to the work queue. | |
621 | */ | |
04b090d5 | 622 | static void __iucv_cleanup_queue(void *dummy) |
2356f4cb MS |
623 | { |
624 | } | |
04b090d5 | 625 | #endif |
2356f4cb MS |
626 | |
627 | /** | |
04b090d5 | 628 | * iucv_cleanup_queue |
2356f4cb MS |
629 | * |
630 | * Function called after a path has been severed to find all remaining | |
631 | * work items for the now stale pathid. The caller needs to hold the | |
632 | * iucv_table_lock. | |
633 | */ | |
04b090d5 | 634 | static void iucv_cleanup_queue(void) |
2356f4cb | 635 | { |
04b090d5 | 636 | struct iucv_irq_list *p, *n; |
2356f4cb MS |
637 | |
638 | /* | |
04b090d5 MS |
639 | * When a path is severed, the pathid can be reused immediatly |
640 | * on a iucv connect or a connection pending interrupt. Remove | |
641 | * all entries from the task queue that refer to a stale pathid | |
642 | * (iucv_path_table[ix] == NULL). Only then do the iucv connect | |
643 | * or deliver the connection pending interrupt. To get all the | |
644 | * pending interrupts force them to the work queue by calling | |
645 | * an empty function on all cpus. | |
2356f4cb | 646 | */ |
04b090d5 MS |
647 | smp_call_function(__iucv_cleanup_queue, NULL, 0, 1); |
648 | spin_lock_irq(&iucv_queue_lock); | |
649 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) { | |
650 | /* Remove stale work items from the task queue. */ | |
651 | if (iucv_path_table[p->data.ippathid] == NULL) { | |
2356f4cb MS |
652 | list_del(&p->list); |
653 | kfree(p); | |
654 | } | |
655 | } | |
04b090d5 | 656 | spin_unlock_irq(&iucv_queue_lock); |
2356f4cb MS |
657 | } |
658 | ||
659 | /** | |
660 | * iucv_register: | |
661 | * @handler: address of iucv handler structure | |
662 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
663 | * | |
664 | * Registers a driver with IUCV. | |
665 | * | |
666 | * Returns 0 on success, -ENOMEM if the memory allocation for the pathid | |
667 | * table failed, or -EIO if IUCV_DECLARE_BUFFER failed on all cpus. | |
668 | */ | |
669 | int iucv_register(struct iucv_handler *handler, int smp) | |
670 | { | |
671 | int rc; | |
672 | ||
673 | if (!iucv_available) | |
674 | return -ENOSYS; | |
675 | mutex_lock(&iucv_register_mutex); | |
676 | if (!smp) | |
677 | iucv_nonsmp_handler++; | |
678 | if (list_empty(&iucv_handler_list)) { | |
679 | rc = iucv_enable(); | |
680 | if (rc) | |
681 | goto out_mutex; | |
682 | } else if (!smp && iucv_nonsmp_handler == 1) | |
683 | iucv_setmask_up(); | |
684 | INIT_LIST_HEAD(&handler->paths); | |
685 | ||
686 | spin_lock_irq(&iucv_table_lock); | |
687 | list_add_tail(&handler->list, &iucv_handler_list); | |
688 | spin_unlock_irq(&iucv_table_lock); | |
689 | rc = 0; | |
690 | out_mutex: | |
691 | mutex_unlock(&iucv_register_mutex); | |
692 | return rc; | |
693 | } | |
694 | ||
695 | /** | |
696 | * iucv_unregister | |
697 | * @handler: address of iucv handler structure | |
698 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
699 | * | |
700 | * Unregister driver from IUCV. | |
701 | */ | |
702 | void iucv_unregister(struct iucv_handler *handler, int smp) | |
703 | { | |
704 | struct iucv_path *p, *n; | |
705 | ||
706 | mutex_lock(&iucv_register_mutex); | |
707 | spin_lock_bh(&iucv_table_lock); | |
708 | /* Remove handler from the iucv_handler_list. */ | |
709 | list_del_init(&handler->list); | |
710 | /* Sever all pathids still refering to the handler. */ | |
711 | list_for_each_entry_safe(p, n, &handler->paths, list) { | |
712 | iucv_sever_pathid(p->pathid, NULL); | |
713 | iucv_path_table[p->pathid] = NULL; | |
714 | list_del(&p->list); | |
2356f4cb MS |
715 | iucv_path_free(p); |
716 | } | |
717 | spin_unlock_bh(&iucv_table_lock); | |
718 | if (!smp) | |
719 | iucv_nonsmp_handler--; | |
720 | if (list_empty(&iucv_handler_list)) | |
721 | iucv_disable(); | |
722 | else if (!smp && iucv_nonsmp_handler == 0) | |
723 | iucv_setmask_mp(); | |
724 | mutex_unlock(&iucv_register_mutex); | |
725 | } | |
726 | ||
727 | /** | |
728 | * iucv_path_accept | |
729 | * @path: address of iucv path structure | |
730 | * @handler: address of iucv handler structure | |
731 | * @userdata: 16 bytes of data reflected to the communication partner | |
732 | * @private: private data passed to interrupt handlers for this path | |
733 | * | |
734 | * This function is issued after the user received a connection pending | |
735 | * external interrupt and now wishes to complete the IUCV communication path. | |
736 | * | |
737 | * Returns the result of the CP IUCV call. | |
738 | */ | |
739 | int iucv_path_accept(struct iucv_path *path, struct iucv_handler *handler, | |
740 | u8 userdata[16], void *private) | |
741 | { | |
742 | union iucv_param *parm; | |
743 | int rc; | |
744 | ||
745 | local_bh_disable(); | |
746 | /* Prepare parameter block. */ | |
747 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
748 | memset(parm, 0, sizeof(union iucv_param)); | |
749 | parm->ctrl.ippathid = path->pathid; | |
750 | parm->ctrl.ipmsglim = path->msglim; | |
751 | if (userdata) | |
752 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
753 | parm->ctrl.ipflags1 = path->flags; | |
754 | ||
755 | rc = iucv_call_b2f0(IUCV_ACCEPT, parm); | |
756 | if (!rc) { | |
757 | path->private = private; | |
758 | path->msglim = parm->ctrl.ipmsglim; | |
759 | path->flags = parm->ctrl.ipflags1; | |
760 | } | |
761 | local_bh_enable(); | |
762 | return rc; | |
763 | } | |
764 | ||
765 | /** | |
766 | * iucv_path_connect | |
767 | * @path: address of iucv path structure | |
768 | * @handler: address of iucv handler structure | |
769 | * @userid: 8-byte user identification | |
770 | * @system: 8-byte target system identification | |
771 | * @userdata: 16 bytes of data reflected to the communication partner | |
772 | * @private: private data passed to interrupt handlers for this path | |
773 | * | |
774 | * This function establishes an IUCV path. Although the connect may complete | |
775 | * successfully, you are not able to use the path until you receive an IUCV | |
776 | * Connection Complete external interrupt. | |
777 | * | |
778 | * Returns the result of the CP IUCV call. | |
779 | */ | |
780 | int iucv_path_connect(struct iucv_path *path, struct iucv_handler *handler, | |
781 | u8 userid[8], u8 system[8], u8 userdata[16], | |
782 | void *private) | |
783 | { | |
784 | union iucv_param *parm; | |
785 | int rc; | |
786 | ||
04b090d5 MS |
787 | BUG_ON(in_atomic()); |
788 | spin_lock_bh(&iucv_table_lock); | |
789 | iucv_cleanup_queue(); | |
2356f4cb MS |
790 | parm = percpu_ptr(iucv_param, smp_processor_id()); |
791 | memset(parm, 0, sizeof(union iucv_param)); | |
792 | parm->ctrl.ipmsglim = path->msglim; | |
793 | parm->ctrl.ipflags1 = path->flags; | |
794 | if (userid) { | |
795 | memcpy(parm->ctrl.ipvmid, userid, sizeof(parm->ctrl.ipvmid)); | |
796 | ASCEBC(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
797 | EBC_TOUPPER(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
798 | } | |
799 | if (system) { | |
800 | memcpy(parm->ctrl.iptarget, system, | |
801 | sizeof(parm->ctrl.iptarget)); | |
802 | ASCEBC(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
803 | EBC_TOUPPER(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
804 | } | |
805 | if (userdata) | |
806 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
807 | ||
808 | rc = iucv_call_b2f0(IUCV_CONNECT, parm); | |
809 | if (!rc) { | |
810 | if (parm->ctrl.ippathid < iucv_max_pathid) { | |
811 | path->pathid = parm->ctrl.ippathid; | |
812 | path->msglim = parm->ctrl.ipmsglim; | |
813 | path->flags = parm->ctrl.ipflags1; | |
814 | path->handler = handler; | |
815 | path->private = private; | |
816 | list_add_tail(&path->list, &handler->paths); | |
817 | iucv_path_table[path->pathid] = path; | |
818 | } else { | |
819 | iucv_sever_pathid(parm->ctrl.ippathid, | |
820 | iucv_error_pathid); | |
821 | rc = -EIO; | |
822 | } | |
823 | } | |
04b090d5 | 824 | spin_unlock_bh(&iucv_table_lock); |
2356f4cb MS |
825 | return rc; |
826 | } | |
827 | ||
828 | /** | |
829 | * iucv_path_quiesce: | |
830 | * @path: address of iucv path structure | |
831 | * @userdata: 16 bytes of data reflected to the communication partner | |
832 | * | |
833 | * This function temporarily suspends incoming messages on an IUCV path. | |
834 | * You can later reactivate the path by invoking the iucv_resume function. | |
835 | * | |
836 | * Returns the result from the CP IUCV call. | |
837 | */ | |
838 | int iucv_path_quiesce(struct iucv_path *path, u8 userdata[16]) | |
839 | { | |
840 | union iucv_param *parm; | |
841 | int rc; | |
842 | ||
843 | local_bh_disable(); | |
844 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
845 | memset(parm, 0, sizeof(union iucv_param)); | |
846 | if (userdata) | |
847 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
848 | parm->ctrl.ippathid = path->pathid; | |
849 | rc = iucv_call_b2f0(IUCV_QUIESCE, parm); | |
850 | local_bh_enable(); | |
851 | return rc; | |
852 | } | |
853 | ||
854 | /** | |
855 | * iucv_path_resume: | |
856 | * @path: address of iucv path structure | |
857 | * @userdata: 16 bytes of data reflected to the communication partner | |
858 | * | |
859 | * This function resumes incoming messages on an IUCV path that has | |
860 | * been stopped with iucv_path_quiesce. | |
861 | * | |
862 | * Returns the result from the CP IUCV call. | |
863 | */ | |
864 | int iucv_path_resume(struct iucv_path *path, u8 userdata[16]) | |
865 | { | |
866 | union iucv_param *parm; | |
867 | int rc; | |
868 | ||
869 | local_bh_disable(); | |
870 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
871 | memset(parm, 0, sizeof(union iucv_param)); | |
872 | if (userdata) | |
873 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
874 | parm->ctrl.ippathid = path->pathid; | |
875 | rc = iucv_call_b2f0(IUCV_RESUME, parm); | |
876 | local_bh_enable(); | |
877 | return rc; | |
878 | } | |
879 | ||
880 | /** | |
881 | * iucv_path_sever | |
882 | * @path: address of iucv path structure | |
883 | * @userdata: 16 bytes of data reflected to the communication partner | |
884 | * | |
885 | * This function terminates an IUCV path. | |
886 | * | |
887 | * Returns the result from the CP IUCV call. | |
888 | */ | |
889 | int iucv_path_sever(struct iucv_path *path, u8 userdata[16]) | |
890 | { | |
891 | int rc; | |
892 | ||
893 | ||
894 | preempt_disable(); | |
04b090d5 | 895 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb MS |
896 | spin_lock_bh(&iucv_table_lock); |
897 | rc = iucv_sever_pathid(path->pathid, userdata); | |
898 | if (!rc) { | |
899 | iucv_path_table[path->pathid] = NULL; | |
900 | list_del_init(&path->list); | |
2356f4cb | 901 | } |
04b090d5 | 902 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb MS |
903 | spin_unlock_bh(&iucv_table_lock); |
904 | preempt_enable(); | |
905 | return rc; | |
906 | } | |
907 | ||
908 | /** | |
909 | * iucv_message_purge | |
910 | * @path: address of iucv path structure | |
911 | * @msg: address of iucv msg structure | |
912 | * @srccls: source class of message | |
913 | * | |
914 | * Cancels a message you have sent. | |
915 | * | |
916 | * Returns the result from the CP IUCV call. | |
917 | */ | |
918 | int iucv_message_purge(struct iucv_path *path, struct iucv_message *msg, | |
919 | u32 srccls) | |
920 | { | |
921 | union iucv_param *parm; | |
922 | int rc; | |
923 | ||
924 | local_bh_disable(); | |
925 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
926 | memset(parm, 0, sizeof(union iucv_param)); | |
927 | parm->purge.ippathid = path->pathid; | |
928 | parm->purge.ipmsgid = msg->id; | |
929 | parm->purge.ipsrccls = srccls; | |
930 | parm->purge.ipflags1 = IUCV_IPSRCCLS | IUCV_IPFGMID | IUCV_IPFGPID; | |
931 | rc = iucv_call_b2f0(IUCV_PURGE, parm); | |
932 | if (!rc) { | |
933 | msg->audit = (*(u32 *) &parm->purge.ipaudit) >> 8; | |
934 | msg->tag = parm->purge.ipmsgtag; | |
935 | } | |
936 | local_bh_enable(); | |
937 | return rc; | |
938 | } | |
939 | ||
940 | /** | |
941 | * iucv_message_receive | |
942 | * @path: address of iucv path structure | |
943 | * @msg: address of iucv msg structure | |
944 | * @flags: how the message is received (IUCV_IPBUFLST) | |
945 | * @buffer: address of data buffer or address of struct iucv_array | |
946 | * @size: length of data buffer | |
947 | * @residual: | |
948 | * | |
949 | * This function receives messages that are being sent to you over | |
950 | * established paths. This function will deal with RMDATA messages | |
951 | * embedded in struct iucv_message as well. | |
952 | * | |
953 | * Returns the result from the CP IUCV call. | |
954 | */ | |
955 | int iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, | |
956 | u8 flags, void *buffer, size_t size, size_t *residual) | |
957 | { | |
958 | union iucv_param *parm; | |
959 | struct iucv_array *array; | |
960 | u8 *rmmsg; | |
961 | size_t copy; | |
962 | int rc; | |
963 | ||
964 | if (msg->flags & IUCV_IPRMDATA) { | |
965 | /* | |
966 | * Message is 8 bytes long and has been stored to the | |
967 | * message descriptor itself. | |
968 | */ | |
969 | rc = (size < 8) ? 5 : 0; | |
970 | if (residual) | |
971 | *residual = abs(size - 8); | |
972 | rmmsg = msg->rmmsg; | |
973 | if (flags & IUCV_IPBUFLST) { | |
974 | /* Copy to struct iucv_array. */ | |
975 | size = (size < 8) ? size : 8; | |
976 | for (array = buffer; size > 0; array++) { | |
977 | copy = min_t(size_t, size, array->length); | |
978 | memcpy((u8 *)(addr_t) array->address, | |
979 | rmmsg, copy); | |
980 | rmmsg += copy; | |
981 | size -= copy; | |
982 | } | |
983 | } else { | |
984 | /* Copy to direct buffer. */ | |
985 | memcpy(buffer, rmmsg, min_t(size_t, size, 8)); | |
986 | } | |
987 | return 0; | |
988 | } | |
989 | ||
990 | local_bh_disable(); | |
991 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
992 | memset(parm, 0, sizeof(union iucv_param)); | |
993 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
994 | parm->db.ipbfln1f = (u32) size; | |
995 | parm->db.ipmsgid = msg->id; | |
996 | parm->db.ippathid = path->pathid; | |
997 | parm->db.iptrgcls = msg->class; | |
998 | parm->db.ipflags1 = (flags | IUCV_IPFGPID | | |
999 | IUCV_IPFGMID | IUCV_IPTRGCLS); | |
1000 | rc = iucv_call_b2f0(IUCV_RECEIVE, parm); | |
1001 | if (!rc || rc == 5) { | |
1002 | msg->flags = parm->db.ipflags1; | |
1003 | if (residual) | |
1004 | *residual = parm->db.ipbfln1f; | |
1005 | } | |
1006 | local_bh_enable(); | |
1007 | return rc; | |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * iucv_message_reject | |
1012 | * @path: address of iucv path structure | |
1013 | * @msg: address of iucv msg structure | |
1014 | * | |
1015 | * The reject function refuses a specified message. Between the time you | |
1016 | * are notified of a message and the time that you complete the message, | |
1017 | * the message may be rejected. | |
1018 | * | |
1019 | * Returns the result from the CP IUCV call. | |
1020 | */ | |
1021 | int iucv_message_reject(struct iucv_path *path, struct iucv_message *msg) | |
1022 | { | |
1023 | union iucv_param *parm; | |
1024 | int rc; | |
1025 | ||
1026 | local_bh_disable(); | |
1027 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
1028 | memset(parm, 0, sizeof(union iucv_param)); | |
1029 | parm->db.ippathid = path->pathid; | |
1030 | parm->db.ipmsgid = msg->id; | |
1031 | parm->db.iptrgcls = msg->class; | |
1032 | parm->db.ipflags1 = (IUCV_IPTRGCLS | IUCV_IPFGMID | IUCV_IPFGPID); | |
1033 | rc = iucv_call_b2f0(IUCV_REJECT, parm); | |
1034 | local_bh_enable(); | |
1035 | return rc; | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * iucv_message_reply | |
1040 | * @path: address of iucv path structure | |
1041 | * @msg: address of iucv msg structure | |
1042 | * @flags: how the reply is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1043 | * @reply: address of reply data buffer or address of struct iucv_array | |
1044 | * @size: length of reply data buffer | |
1045 | * | |
1046 | * This function responds to the two-way messages that you receive. You | |
1047 | * must identify completely the message to which you wish to reply. ie, | |
1048 | * pathid, msgid, and trgcls. Prmmsg signifies the data is moved into | |
1049 | * the parameter list. | |
1050 | * | |
1051 | * Returns the result from the CP IUCV call. | |
1052 | */ | |
1053 | int iucv_message_reply(struct iucv_path *path, struct iucv_message *msg, | |
1054 | u8 flags, void *reply, size_t size) | |
1055 | { | |
1056 | union iucv_param *parm; | |
1057 | int rc; | |
1058 | ||
1059 | local_bh_disable(); | |
1060 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
1061 | memset(parm, 0, sizeof(union iucv_param)); | |
1062 | if (flags & IUCV_IPRMDATA) { | |
1063 | parm->dpl.ippathid = path->pathid; | |
1064 | parm->dpl.ipflags1 = flags; | |
1065 | parm->dpl.ipmsgid = msg->id; | |
1066 | parm->dpl.iptrgcls = msg->class; | |
1067 | memcpy(parm->dpl.iprmmsg, reply, min_t(size_t, size, 8)); | |
1068 | } else { | |
1069 | parm->db.ipbfadr1 = (u32)(addr_t) reply; | |
1070 | parm->db.ipbfln1f = (u32) size; | |
1071 | parm->db.ippathid = path->pathid; | |
1072 | parm->db.ipflags1 = flags; | |
1073 | parm->db.ipmsgid = msg->id; | |
1074 | parm->db.iptrgcls = msg->class; | |
1075 | } | |
1076 | rc = iucv_call_b2f0(IUCV_REPLY, parm); | |
1077 | local_bh_enable(); | |
1078 | return rc; | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * iucv_message_send | |
1083 | * @path: address of iucv path structure | |
1084 | * @msg: address of iucv msg structure | |
1085 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1086 | * @srccls: source class of message | |
1087 | * @buffer: address of send buffer or address of struct iucv_array | |
1088 | * @size: length of send buffer | |
1089 | * | |
1090 | * This function transmits data to another application. Data to be | |
1091 | * transmitted is in a buffer and this is a one-way message and the | |
1092 | * receiver will not reply to the message. | |
1093 | * | |
1094 | * Returns the result from the CP IUCV call. | |
1095 | */ | |
1096 | int iucv_message_send(struct iucv_path *path, struct iucv_message *msg, | |
1097 | u8 flags, u32 srccls, void *buffer, size_t size) | |
1098 | { | |
1099 | union iucv_param *parm; | |
1100 | int rc; | |
1101 | ||
1102 | local_bh_disable(); | |
1103 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
1104 | memset(parm, 0, sizeof(union iucv_param)); | |
1105 | if (flags & IUCV_IPRMDATA) { | |
1106 | /* Message of 8 bytes can be placed into the parameter list. */ | |
1107 | parm->dpl.ippathid = path->pathid; | |
1108 | parm->dpl.ipflags1 = flags | IUCV_IPNORPY; | |
1109 | parm->dpl.iptrgcls = msg->class; | |
1110 | parm->dpl.ipsrccls = srccls; | |
1111 | parm->dpl.ipmsgtag = msg->tag; | |
1112 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1113 | } else { | |
1114 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1115 | parm->db.ipbfln1f = (u32) size; | |
1116 | parm->db.ippathid = path->pathid; | |
1117 | parm->db.ipflags1 = flags | IUCV_IPNORPY; | |
1118 | parm->db.iptrgcls = msg->class; | |
1119 | parm->db.ipsrccls = srccls; | |
1120 | parm->db.ipmsgtag = msg->tag; | |
1121 | } | |
1122 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1123 | if (!rc) | |
1124 | msg->id = parm->db.ipmsgid; | |
1125 | local_bh_enable(); | |
1126 | return rc; | |
1127 | } | |
1128 | ||
1129 | /** | |
1130 | * iucv_message_send2way | |
1131 | * @path: address of iucv path structure | |
1132 | * @msg: address of iucv msg structure | |
1133 | * @flags: how the message is sent and the reply is received | |
1134 | * (IUCV_IPRMDATA, IUCV_IPBUFLST, IUCV_IPPRTY, IUCV_ANSLST) | |
1135 | * @srccls: source class of message | |
1136 | * @buffer: address of send buffer or address of struct iucv_array | |
1137 | * @size: length of send buffer | |
1138 | * @ansbuf: address of answer buffer or address of struct iucv_array | |
1139 | * @asize: size of reply buffer | |
1140 | * | |
1141 | * This function transmits data to another application. Data to be | |
1142 | * transmitted is in a buffer. The receiver of the send is expected to | |
1143 | * reply to the message and a buffer is provided into which IUCV moves | |
1144 | * the reply to this message. | |
1145 | * | |
1146 | * Returns the result from the CP IUCV call. | |
1147 | */ | |
1148 | int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg, | |
1149 | u8 flags, u32 srccls, void *buffer, size_t size, | |
1150 | void *answer, size_t asize, size_t *residual) | |
1151 | { | |
1152 | union iucv_param *parm; | |
1153 | int rc; | |
1154 | ||
1155 | local_bh_disable(); | |
1156 | parm = percpu_ptr(iucv_param, smp_processor_id()); | |
1157 | memset(parm, 0, sizeof(union iucv_param)); | |
1158 | if (flags & IUCV_IPRMDATA) { | |
1159 | parm->dpl.ippathid = path->pathid; | |
1160 | parm->dpl.ipflags1 = path->flags; /* priority message */ | |
1161 | parm->dpl.iptrgcls = msg->class; | |
1162 | parm->dpl.ipsrccls = srccls; | |
1163 | parm->dpl.ipmsgtag = msg->tag; | |
1164 | parm->dpl.ipbfadr2 = (u32)(addr_t) answer; | |
1165 | parm->dpl.ipbfln2f = (u32) asize; | |
1166 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1167 | } else { | |
1168 | parm->db.ippathid = path->pathid; | |
1169 | parm->db.ipflags1 = path->flags; /* priority message */ | |
1170 | parm->db.iptrgcls = msg->class; | |
1171 | parm->db.ipsrccls = srccls; | |
1172 | parm->db.ipmsgtag = msg->tag; | |
1173 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1174 | parm->db.ipbfln1f = (u32) size; | |
1175 | parm->db.ipbfadr2 = (u32)(addr_t) answer; | |
1176 | parm->db.ipbfln2f = (u32) asize; | |
1177 | } | |
1178 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1179 | if (!rc) | |
1180 | msg->id = parm->db.ipmsgid; | |
1181 | local_bh_enable(); | |
1182 | return rc; | |
1183 | } | |
1184 | ||
1185 | /** | |
1186 | * iucv_path_pending | |
1187 | * @data: Pointer to external interrupt buffer | |
1188 | * | |
1189 | * Process connection pending work item. Called from tasklet while holding | |
1190 | * iucv_table_lock. | |
1191 | */ | |
1192 | struct iucv_path_pending { | |
1193 | u16 ippathid; | |
1194 | u8 ipflags1; | |
1195 | u8 iptype; | |
1196 | u16 ipmsglim; | |
1197 | u16 res1; | |
1198 | u8 ipvmid[8]; | |
1199 | u8 ipuser[16]; | |
1200 | u32 res3; | |
1201 | u8 ippollfg; | |
1202 | u8 res4[3]; | |
1203 | } __attribute__ ((packed)); | |
1204 | ||
1205 | static void iucv_path_pending(struct iucv_irq_data *data) | |
1206 | { | |
1207 | struct iucv_path_pending *ipp = (void *) data; | |
1208 | struct iucv_handler *handler; | |
1209 | struct iucv_path *path; | |
1210 | char *error; | |
1211 | ||
1212 | BUG_ON(iucv_path_table[ipp->ippathid]); | |
1213 | /* New pathid, handler found. Create a new path struct. */ | |
1214 | error = iucv_error_no_memory; | |
1215 | path = iucv_path_alloc(ipp->ipmsglim, ipp->ipflags1, GFP_ATOMIC); | |
1216 | if (!path) | |
1217 | goto out_sever; | |
1218 | path->pathid = ipp->ippathid; | |
1219 | iucv_path_table[path->pathid] = path; | |
1220 | EBCASC(ipp->ipvmid, 8); | |
1221 | ||
1222 | /* Call registered handler until one is found that wants the path. */ | |
1223 | list_for_each_entry(handler, &iucv_handler_list, list) { | |
1224 | if (!handler->path_pending) | |
1225 | continue; | |
1226 | /* | |
1227 | * Add path to handler to allow a call to iucv_path_sever | |
1228 | * inside the path_pending function. If the handler returns | |
1229 | * an error remove the path from the handler again. | |
1230 | */ | |
1231 | list_add(&path->list, &handler->paths); | |
1232 | path->handler = handler; | |
1233 | if (!handler->path_pending(path, ipp->ipvmid, ipp->ipuser)) | |
1234 | return; | |
1235 | list_del(&path->list); | |
1236 | path->handler = NULL; | |
1237 | } | |
1238 | /* No handler wanted the path. */ | |
1239 | iucv_path_table[path->pathid] = NULL; | |
1240 | iucv_path_free(path); | |
1241 | error = iucv_error_no_listener; | |
1242 | out_sever: | |
1243 | iucv_sever_pathid(ipp->ippathid, error); | |
1244 | } | |
1245 | ||
1246 | /** | |
1247 | * iucv_path_complete | |
1248 | * @data: Pointer to external interrupt buffer | |
1249 | * | |
1250 | * Process connection complete work item. Called from tasklet while holding | |
1251 | * iucv_table_lock. | |
1252 | */ | |
1253 | struct iucv_path_complete { | |
1254 | u16 ippathid; | |
1255 | u8 ipflags1; | |
1256 | u8 iptype; | |
1257 | u16 ipmsglim; | |
1258 | u16 res1; | |
1259 | u8 res2[8]; | |
1260 | u8 ipuser[16]; | |
1261 | u32 res3; | |
1262 | u8 ippollfg; | |
1263 | u8 res4[3]; | |
1264 | } __attribute__ ((packed)); | |
1265 | ||
1266 | static void iucv_path_complete(struct iucv_irq_data *data) | |
1267 | { | |
1268 | struct iucv_path_complete *ipc = (void *) data; | |
1269 | struct iucv_path *path = iucv_path_table[ipc->ippathid]; | |
1270 | ||
04b090d5 | 1271 | if (path && path->handler && path->handler->path_complete) |
2356f4cb MS |
1272 | path->handler->path_complete(path, ipc->ipuser); |
1273 | } | |
1274 | ||
1275 | /** | |
1276 | * iucv_path_severed | |
1277 | * @data: Pointer to external interrupt buffer | |
1278 | * | |
1279 | * Process connection severed work item. Called from tasklet while holding | |
1280 | * iucv_table_lock. | |
1281 | */ | |
1282 | struct iucv_path_severed { | |
1283 | u16 ippathid; | |
1284 | u8 res1; | |
1285 | u8 iptype; | |
1286 | u32 res2; | |
1287 | u8 res3[8]; | |
1288 | u8 ipuser[16]; | |
1289 | u32 res4; | |
1290 | u8 ippollfg; | |
1291 | u8 res5[3]; | |
1292 | } __attribute__ ((packed)); | |
1293 | ||
1294 | static void iucv_path_severed(struct iucv_irq_data *data) | |
1295 | { | |
1296 | struct iucv_path_severed *ips = (void *) data; | |
1297 | struct iucv_path *path = iucv_path_table[ips->ippathid]; | |
1298 | ||
04b090d5 MS |
1299 | if (!path || !path->handler) /* Already severed */ |
1300 | return; | |
2356f4cb MS |
1301 | if (path->handler->path_severed) |
1302 | path->handler->path_severed(path, ips->ipuser); | |
1303 | else { | |
1304 | iucv_sever_pathid(path->pathid, NULL); | |
1305 | iucv_path_table[path->pathid] = NULL; | |
1306 | list_del_init(&path->list); | |
2356f4cb MS |
1307 | iucv_path_free(path); |
1308 | } | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * iucv_path_quiesced | |
1313 | * @data: Pointer to external interrupt buffer | |
1314 | * | |
1315 | * Process connection quiesced work item. Called from tasklet while holding | |
1316 | * iucv_table_lock. | |
1317 | */ | |
1318 | struct iucv_path_quiesced { | |
1319 | u16 ippathid; | |
1320 | u8 res1; | |
1321 | u8 iptype; | |
1322 | u32 res2; | |
1323 | u8 res3[8]; | |
1324 | u8 ipuser[16]; | |
1325 | u32 res4; | |
1326 | u8 ippollfg; | |
1327 | u8 res5[3]; | |
1328 | } __attribute__ ((packed)); | |
1329 | ||
1330 | static void iucv_path_quiesced(struct iucv_irq_data *data) | |
1331 | { | |
1332 | struct iucv_path_quiesced *ipq = (void *) data; | |
1333 | struct iucv_path *path = iucv_path_table[ipq->ippathid]; | |
1334 | ||
04b090d5 | 1335 | if (path && path->handler && path->handler->path_quiesced) |
2356f4cb MS |
1336 | path->handler->path_quiesced(path, ipq->ipuser); |
1337 | } | |
1338 | ||
1339 | /** | |
1340 | * iucv_path_resumed | |
1341 | * @data: Pointer to external interrupt buffer | |
1342 | * | |
1343 | * Process connection resumed work item. Called from tasklet while holding | |
1344 | * iucv_table_lock. | |
1345 | */ | |
1346 | struct iucv_path_resumed { | |
1347 | u16 ippathid; | |
1348 | u8 res1; | |
1349 | u8 iptype; | |
1350 | u32 res2; | |
1351 | u8 res3[8]; | |
1352 | u8 ipuser[16]; | |
1353 | u32 res4; | |
1354 | u8 ippollfg; | |
1355 | u8 res5[3]; | |
1356 | } __attribute__ ((packed)); | |
1357 | ||
1358 | static void iucv_path_resumed(struct iucv_irq_data *data) | |
1359 | { | |
1360 | struct iucv_path_resumed *ipr = (void *) data; | |
1361 | struct iucv_path *path = iucv_path_table[ipr->ippathid]; | |
1362 | ||
04b090d5 | 1363 | if (path && path->handler && path->handler->path_resumed) |
2356f4cb MS |
1364 | path->handler->path_resumed(path, ipr->ipuser); |
1365 | } | |
1366 | ||
1367 | /** | |
1368 | * iucv_message_complete | |
1369 | * @data: Pointer to external interrupt buffer | |
1370 | * | |
1371 | * Process message complete work item. Called from tasklet while holding | |
1372 | * iucv_table_lock. | |
1373 | */ | |
1374 | struct iucv_message_complete { | |
1375 | u16 ippathid; | |
1376 | u8 ipflags1; | |
1377 | u8 iptype; | |
1378 | u32 ipmsgid; | |
1379 | u32 ipaudit; | |
1380 | u8 iprmmsg[8]; | |
1381 | u32 ipsrccls; | |
1382 | u32 ipmsgtag; | |
1383 | u32 res; | |
1384 | u32 ipbfln2f; | |
1385 | u8 ippollfg; | |
1386 | u8 res2[3]; | |
1387 | } __attribute__ ((packed)); | |
1388 | ||
1389 | static void iucv_message_complete(struct iucv_irq_data *data) | |
1390 | { | |
1391 | struct iucv_message_complete *imc = (void *) data; | |
1392 | struct iucv_path *path = iucv_path_table[imc->ippathid]; | |
1393 | struct iucv_message msg; | |
1394 | ||
04b090d5 | 1395 | if (path && path->handler && path->handler->message_complete) { |
2356f4cb MS |
1396 | msg.flags = imc->ipflags1; |
1397 | msg.id = imc->ipmsgid; | |
1398 | msg.audit = imc->ipaudit; | |
1399 | memcpy(msg.rmmsg, imc->iprmmsg, 8); | |
1400 | msg.class = imc->ipsrccls; | |
1401 | msg.tag = imc->ipmsgtag; | |
1402 | msg.length = imc->ipbfln2f; | |
1403 | path->handler->message_complete(path, &msg); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | /** | |
1408 | * iucv_message_pending | |
1409 | * @data: Pointer to external interrupt buffer | |
1410 | * | |
1411 | * Process message pending work item. Called from tasklet while holding | |
1412 | * iucv_table_lock. | |
1413 | */ | |
1414 | struct iucv_message_pending { | |
1415 | u16 ippathid; | |
1416 | u8 ipflags1; | |
1417 | u8 iptype; | |
1418 | u32 ipmsgid; | |
1419 | u32 iptrgcls; | |
1420 | union { | |
1421 | u32 iprmmsg1_u32; | |
1422 | u8 iprmmsg1[4]; | |
1423 | } ln1msg1; | |
1424 | union { | |
1425 | u32 ipbfln1f; | |
1426 | u8 iprmmsg2[4]; | |
1427 | } ln1msg2; | |
1428 | u32 res1[3]; | |
1429 | u32 ipbfln2f; | |
1430 | u8 ippollfg; | |
1431 | u8 res2[3]; | |
1432 | } __attribute__ ((packed)); | |
1433 | ||
1434 | static void iucv_message_pending(struct iucv_irq_data *data) | |
1435 | { | |
1436 | struct iucv_message_pending *imp = (void *) data; | |
1437 | struct iucv_path *path = iucv_path_table[imp->ippathid]; | |
1438 | struct iucv_message msg; | |
1439 | ||
04b090d5 | 1440 | if (path && path->handler && path->handler->message_pending) { |
2356f4cb MS |
1441 | msg.flags = imp->ipflags1; |
1442 | msg.id = imp->ipmsgid; | |
1443 | msg.class = imp->iptrgcls; | |
1444 | if (imp->ipflags1 & IUCV_IPRMDATA) { | |
1445 | memcpy(msg.rmmsg, imp->ln1msg1.iprmmsg1, 8); | |
1446 | msg.length = 8; | |
1447 | } else | |
1448 | msg.length = imp->ln1msg2.ipbfln1f; | |
1449 | msg.reply_size = imp->ipbfln2f; | |
1450 | path->handler->message_pending(path, &msg); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /** | |
04b090d5 | 1455 | * iucv_tasklet_fn: |
2356f4cb MS |
1456 | * |
1457 | * This tasklet loops over the queue of irq buffers created by | |
1458 | * iucv_external_interrupt, calls the appropriate action handler | |
1459 | * and then frees the buffer. | |
1460 | */ | |
04b090d5 | 1461 | static void iucv_tasklet_fn(unsigned long ignored) |
2356f4cb MS |
1462 | { |
1463 | typedef void iucv_irq_fn(struct iucv_irq_data *); | |
1464 | static iucv_irq_fn *irq_fn[] = { | |
2356f4cb MS |
1465 | [0x02] = iucv_path_complete, |
1466 | [0x03] = iucv_path_severed, | |
1467 | [0x04] = iucv_path_quiesced, | |
1468 | [0x05] = iucv_path_resumed, | |
1469 | [0x06] = iucv_message_complete, | |
1470 | [0x07] = iucv_message_complete, | |
1471 | [0x08] = iucv_message_pending, | |
1472 | [0x09] = iucv_message_pending, | |
1473 | }; | |
04b090d5 MS |
1474 | struct list_head task_queue = LIST_HEAD_INIT(task_queue); |
1475 | struct iucv_irq_list *p, *n; | |
2356f4cb MS |
1476 | |
1477 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
1478 | spin_lock(&iucv_table_lock); | |
04b090d5 | 1479 | iucv_active_cpu = smp_processor_id(); |
2356f4cb | 1480 | |
04b090d5 MS |
1481 | spin_lock_irq(&iucv_queue_lock); |
1482 | list_splice_init(&iucv_task_queue, &task_queue); | |
1483 | spin_unlock_irq(&iucv_queue_lock); | |
1484 | ||
1485 | list_for_each_entry_safe(p, n, &task_queue, list) { | |
2356f4cb | 1486 | list_del_init(&p->list); |
2356f4cb MS |
1487 | irq_fn[p->data.iptype](&p->data); |
1488 | kfree(p); | |
2356f4cb | 1489 | } |
2356f4cb | 1490 | |
04b090d5 | 1491 | iucv_active_cpu = -1; |
2356f4cb MS |
1492 | spin_unlock(&iucv_table_lock); |
1493 | } | |
1494 | ||
04b090d5 MS |
1495 | /** |
1496 | * iucv_work_fn: | |
1497 | * | |
1498 | * This work function loops over the queue of path pending irq blocks | |
1499 | * created by iucv_external_interrupt, calls the appropriate action | |
1500 | * handler and then frees the buffer. | |
1501 | */ | |
1502 | static void iucv_work_fn(struct work_struct *work) | |
1503 | { | |
1504 | typedef void iucv_irq_fn(struct iucv_irq_data *); | |
1505 | struct list_head work_queue = LIST_HEAD_INIT(work_queue); | |
1506 | struct iucv_irq_list *p, *n; | |
1507 | ||
1508 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
1509 | spin_lock_bh(&iucv_table_lock); | |
1510 | iucv_active_cpu = smp_processor_id(); | |
1511 | ||
1512 | spin_lock_irq(&iucv_queue_lock); | |
1513 | list_splice_init(&iucv_work_queue, &work_queue); | |
1514 | spin_unlock_irq(&iucv_queue_lock); | |
1515 | ||
1516 | iucv_cleanup_queue(); | |
1517 | list_for_each_entry_safe(p, n, &work_queue, list) { | |
1518 | list_del_init(&p->list); | |
1519 | iucv_path_pending(&p->data); | |
1520 | kfree(p); | |
1521 | } | |
1522 | ||
1523 | iucv_active_cpu = -1; | |
1524 | spin_unlock_bh(&iucv_table_lock); | |
1525 | } | |
1526 | ||
2356f4cb MS |
1527 | /** |
1528 | * iucv_external_interrupt | |
1529 | * @code: irq code | |
1530 | * | |
1531 | * Handles external interrupts coming in from CP. | |
04b090d5 | 1532 | * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn(). |
2356f4cb MS |
1533 | */ |
1534 | static void iucv_external_interrupt(u16 code) | |
1535 | { | |
1536 | struct iucv_irq_data *p; | |
04b090d5 | 1537 | struct iucv_irq_list *work; |
2356f4cb MS |
1538 | |
1539 | p = percpu_ptr(iucv_irq_data, smp_processor_id()); | |
1540 | if (p->ippathid >= iucv_max_pathid) { | |
1541 | printk(KERN_WARNING "iucv_do_int: Got interrupt with " | |
1542 | "pathid %d > max_connections (%ld)\n", | |
1543 | p->ippathid, iucv_max_pathid - 1); | |
1544 | iucv_sever_pathid(p->ippathid, iucv_error_no_listener); | |
1545 | return; | |
1546 | } | |
1547 | if (p->iptype < 0x01 || p->iptype > 0x09) { | |
1548 | printk(KERN_ERR "iucv_do_int: unknown iucv interrupt\n"); | |
1549 | return; | |
1550 | } | |
04b090d5 | 1551 | work = kmalloc(sizeof(struct iucv_irq_list), GFP_ATOMIC); |
2356f4cb MS |
1552 | if (!work) { |
1553 | printk(KERN_WARNING "iucv_external_interrupt: out of memory\n"); | |
1554 | return; | |
1555 | } | |
1556 | memcpy(&work->data, p, sizeof(work->data)); | |
04b090d5 MS |
1557 | spin_lock(&iucv_queue_lock); |
1558 | if (p->iptype == 0x01) { | |
1559 | /* Path pending interrupt. */ | |
1560 | list_add_tail(&work->list, &iucv_work_queue); | |
1561 | schedule_work(&iucv_work); | |
1562 | } else { | |
1563 | /* The other interrupts. */ | |
1564 | list_add_tail(&work->list, &iucv_task_queue); | |
1565 | tasklet_schedule(&iucv_tasklet); | |
1566 | } | |
1567 | spin_unlock(&iucv_queue_lock); | |
2356f4cb MS |
1568 | } |
1569 | ||
1570 | /** | |
1571 | * iucv_init | |
1572 | * | |
1573 | * Allocates and initializes various data structures. | |
1574 | */ | |
1575 | static int iucv_init(void) | |
1576 | { | |
1577 | int rc; | |
1578 | ||
1579 | if (!MACHINE_IS_VM) { | |
1580 | rc = -EPROTONOSUPPORT; | |
1581 | goto out; | |
1582 | } | |
1583 | rc = iucv_query_maxconn(); | |
1584 | if (rc) | |
1585 | goto out; | |
1586 | rc = register_external_interrupt (0x4000, iucv_external_interrupt); | |
1587 | if (rc) | |
1588 | goto out; | |
1589 | rc = bus_register(&iucv_bus); | |
1590 | if (rc) | |
1591 | goto out_int; | |
1592 | iucv_root = s390_root_dev_register("iucv"); | |
1593 | if (IS_ERR(iucv_root)) { | |
1594 | rc = PTR_ERR(iucv_root); | |
1595 | goto out_bus; | |
1596 | } | |
1597 | /* Note: GFP_DMA used used to get memory below 2G */ | |
1598 | iucv_irq_data = percpu_alloc(sizeof(struct iucv_irq_data), | |
1599 | GFP_KERNEL|GFP_DMA); | |
1600 | if (!iucv_irq_data) { | |
1601 | rc = -ENOMEM; | |
1602 | goto out_root; | |
1603 | } | |
1604 | /* Allocate parameter blocks. */ | |
1605 | iucv_param = percpu_alloc(sizeof(union iucv_param), | |
1606 | GFP_KERNEL|GFP_DMA); | |
1607 | if (!iucv_param) { | |
1608 | rc = -ENOMEM; | |
1609 | goto out_extint; | |
1610 | } | |
1611 | register_hotcpu_notifier(&iucv_cpu_notifier); | |
1612 | ASCEBC(iucv_error_no_listener, 16); | |
1613 | ASCEBC(iucv_error_no_memory, 16); | |
1614 | ASCEBC(iucv_error_pathid, 16); | |
1615 | iucv_available = 1; | |
1616 | return 0; | |
1617 | ||
1618 | out_extint: | |
1619 | percpu_free(iucv_irq_data); | |
1620 | out_root: | |
1621 | s390_root_dev_unregister(iucv_root); | |
1622 | out_bus: | |
1623 | bus_unregister(&iucv_bus); | |
1624 | out_int: | |
1625 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
1626 | out: | |
1627 | return rc; | |
1628 | } | |
1629 | ||
1630 | /** | |
1631 | * iucv_exit | |
1632 | * | |
1633 | * Frees everything allocated from iucv_init. | |
1634 | */ | |
1635 | static void iucv_exit(void) | |
1636 | { | |
04b090d5 | 1637 | struct iucv_irq_list *p, *n; |
2356f4cb | 1638 | |
04b090d5 MS |
1639 | spin_lock_irq(&iucv_queue_lock); |
1640 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) | |
1641 | kfree(p); | |
2356f4cb MS |
1642 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) |
1643 | kfree(p); | |
04b090d5 | 1644 | spin_unlock_irq(&iucv_queue_lock); |
2356f4cb MS |
1645 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
1646 | percpu_free(iucv_param); | |
1647 | percpu_free(iucv_irq_data); | |
1648 | s390_root_dev_unregister(iucv_root); | |
1649 | bus_unregister(&iucv_bus); | |
1650 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
1651 | } | |
1652 | ||
1653 | subsys_initcall(iucv_init); | |
1654 | module_exit(iucv_exit); | |
1655 | ||
1656 | /** | |
1657 | * Export all public stuff | |
1658 | */ | |
1659 | EXPORT_SYMBOL (iucv_bus); | |
1660 | EXPORT_SYMBOL (iucv_root); | |
1661 | EXPORT_SYMBOL (iucv_register); | |
1662 | EXPORT_SYMBOL (iucv_unregister); | |
1663 | EXPORT_SYMBOL (iucv_path_accept); | |
1664 | EXPORT_SYMBOL (iucv_path_connect); | |
1665 | EXPORT_SYMBOL (iucv_path_quiesce); | |
1666 | EXPORT_SYMBOL (iucv_path_sever); | |
1667 | EXPORT_SYMBOL (iucv_message_purge); | |
1668 | EXPORT_SYMBOL (iucv_message_receive); | |
1669 | EXPORT_SYMBOL (iucv_message_reject); | |
1670 | EXPORT_SYMBOL (iucv_message_reply); | |
1671 | EXPORT_SYMBOL (iucv_message_send); | |
1672 | EXPORT_SYMBOL (iucv_message_send2way); | |
1673 | ||
1674 | MODULE_AUTHOR("(C) 2001 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); | |
1675 | MODULE_DESCRIPTION("Linux for S/390 IUCV lowlevel driver"); | |
1676 | MODULE_LICENSE("GPL"); |