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2356f4cb MS |
1 | /* |
2 | * IUCV base infrastructure. | |
3 | * | |
6c005961 UB |
4 | * Copyright IBM Corp. 2001, 2009 |
5 | * | |
2356f4cb MS |
6 | * Author(s): |
7 | * Original source: | |
8 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 | |
9 | * Xenia Tkatschow (xenia@us.ibm.com) | |
10 | * 2Gb awareness and general cleanup: | |
11 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) | |
12 | * Rewritten for af_iucv: | |
13 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
672e405b UB |
14 | * PM functions: |
15 | * Ursula Braun (ursula.braun@de.ibm.com) | |
2356f4cb MS |
16 | * |
17 | * Documentation used: | |
18 | * The original source | |
19 | * CP Programming Service, IBM document # SC24-5760 | |
20 | * | |
21 | * This program is free software; you can redistribute it and/or modify | |
22 | * it under the terms of the GNU General Public License as published by | |
23 | * the Free Software Foundation; either version 2, or (at your option) | |
24 | * any later version. | |
25 | * | |
26 | * This program is distributed in the hope that it will be useful, | |
27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
29 | * GNU General Public License for more details. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License | |
32 | * along with this program; if not, write to the Free Software | |
33 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
8f7c502c UB |
36 | #define KMSG_COMPONENT "iucv" |
37 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
38 | ||
2356f4cb MS |
39 | #include <linux/module.h> |
40 | #include <linux/moduleparam.h> | |
2356f4cb MS |
41 | #include <linux/spinlock.h> |
42 | #include <linux/kernel.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/init.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/err.h> | |
49 | #include <linux/device.h> | |
50 | #include <linux/cpu.h> | |
6c005961 | 51 | #include <linux/reboot.h> |
2356f4cb MS |
52 | #include <net/iucv/iucv.h> |
53 | #include <asm/atomic.h> | |
54 | #include <asm/ebcdic.h> | |
55 | #include <asm/io.h> | |
56 | #include <asm/s390_ext.h> | |
2356f4cb MS |
57 | #include <asm/smp.h> |
58 | ||
59 | /* | |
60 | * FLAGS: | |
61 | * All flags are defined in the field IPFLAGS1 of each function | |
62 | * and can be found in CP Programming Services. | |
63 | * IPSRCCLS - Indicates you have specified a source class. | |
64 | * IPTRGCLS - Indicates you have specified a target class. | |
65 | * IPFGPID - Indicates you have specified a pathid. | |
66 | * IPFGMID - Indicates you have specified a message ID. | |
67 | * IPNORPY - Indicates a one-way message. No reply expected. | |
68 | * IPALL - Indicates that all paths are affected. | |
69 | */ | |
70 | #define IUCV_IPSRCCLS 0x01 | |
71 | #define IUCV_IPTRGCLS 0x01 | |
72 | #define IUCV_IPFGPID 0x02 | |
73 | #define IUCV_IPFGMID 0x04 | |
74 | #define IUCV_IPNORPY 0x10 | |
75 | #define IUCV_IPALL 0x80 | |
76 | ||
da99f056 | 77 | static int iucv_bus_match(struct device *dev, struct device_driver *drv) |
2356f4cb MS |
78 | { |
79 | return 0; | |
80 | } | |
81 | ||
4c89d86b UB |
82 | enum iucv_pm_states { |
83 | IUCV_PM_INITIAL = 0, | |
84 | IUCV_PM_FREEZING = 1, | |
85 | IUCV_PM_THAWING = 2, | |
86 | IUCV_PM_RESTORING = 3, | |
87 | }; | |
88 | static enum iucv_pm_states iucv_pm_state; | |
89 | ||
672e405b UB |
90 | static int iucv_pm_prepare(struct device *); |
91 | static void iucv_pm_complete(struct device *); | |
92 | static int iucv_pm_freeze(struct device *); | |
93 | static int iucv_pm_thaw(struct device *); | |
94 | static int iucv_pm_restore(struct device *); | |
95 | ||
47145210 | 96 | static const struct dev_pm_ops iucv_pm_ops = { |
672e405b UB |
97 | .prepare = iucv_pm_prepare, |
98 | .complete = iucv_pm_complete, | |
99 | .freeze = iucv_pm_freeze, | |
100 | .thaw = iucv_pm_thaw, | |
101 | .restore = iucv_pm_restore, | |
102 | }; | |
103 | ||
2356f4cb MS |
104 | struct bus_type iucv_bus = { |
105 | .name = "iucv", | |
106 | .match = iucv_bus_match, | |
672e405b | 107 | .pm = &iucv_pm_ops, |
2356f4cb | 108 | }; |
da99f056 | 109 | EXPORT_SYMBOL(iucv_bus); |
2356f4cb MS |
110 | |
111 | struct device *iucv_root; | |
da99f056 HC |
112 | EXPORT_SYMBOL(iucv_root); |
113 | ||
2356f4cb MS |
114 | static int iucv_available; |
115 | ||
116 | /* General IUCV interrupt structure */ | |
117 | struct iucv_irq_data { | |
118 | u16 ippathid; | |
119 | u8 ipflags1; | |
120 | u8 iptype; | |
121 | u32 res2[8]; | |
122 | }; | |
123 | ||
04b090d5 | 124 | struct iucv_irq_list { |
2356f4cb MS |
125 | struct list_head list; |
126 | struct iucv_irq_data data; | |
127 | }; | |
128 | ||
70cf5035 | 129 | static struct iucv_irq_data *iucv_irq_data[NR_CPUS]; |
2356f4cb MS |
130 | static cpumask_t iucv_buffer_cpumask = CPU_MASK_NONE; |
131 | static cpumask_t iucv_irq_cpumask = CPU_MASK_NONE; | |
132 | ||
04b090d5 MS |
133 | /* |
134 | * Queue of interrupt buffers lock for delivery via the tasklet | |
135 | * (fast but can't call smp_call_function). | |
136 | */ | |
137 | static LIST_HEAD(iucv_task_queue); | |
138 | ||
139 | /* | |
140 | * The tasklet for fast delivery of iucv interrupts. | |
141 | */ | |
142 | static void iucv_tasklet_fn(unsigned long); | |
143 | static DECLARE_TASKLET(iucv_tasklet, iucv_tasklet_fn,0); | |
144 | ||
145 | /* | |
146 | * Queue of interrupt buffers for delivery via a work queue | |
147 | * (slower but can call smp_call_function). | |
148 | */ | |
149 | static LIST_HEAD(iucv_work_queue); | |
150 | ||
151 | /* | |
152 | * The work element to deliver path pending interrupts. | |
153 | */ | |
154 | static void iucv_work_fn(struct work_struct *work); | |
155 | static DECLARE_WORK(iucv_work, iucv_work_fn); | |
156 | ||
157 | /* | |
158 | * Spinlock protecting task and work queue. | |
159 | */ | |
160 | static DEFINE_SPINLOCK(iucv_queue_lock); | |
2356f4cb MS |
161 | |
162 | enum iucv_command_codes { | |
163 | IUCV_QUERY = 0, | |
164 | IUCV_RETRIEVE_BUFFER = 2, | |
165 | IUCV_SEND = 4, | |
166 | IUCV_RECEIVE = 5, | |
167 | IUCV_REPLY = 6, | |
168 | IUCV_REJECT = 8, | |
169 | IUCV_PURGE = 9, | |
170 | IUCV_ACCEPT = 10, | |
171 | IUCV_CONNECT = 11, | |
172 | IUCV_DECLARE_BUFFER = 12, | |
173 | IUCV_QUIESCE = 13, | |
174 | IUCV_RESUME = 14, | |
175 | IUCV_SEVER = 15, | |
176 | IUCV_SETMASK = 16, | |
672e405b | 177 | IUCV_SETCONTROLMASK = 17, |
2356f4cb MS |
178 | }; |
179 | ||
180 | /* | |
181 | * Error messages that are used with the iucv_sever function. They get | |
182 | * converted to EBCDIC. | |
183 | */ | |
184 | static char iucv_error_no_listener[16] = "NO LISTENER"; | |
185 | static char iucv_error_no_memory[16] = "NO MEMORY"; | |
186 | static char iucv_error_pathid[16] = "INVALID PATHID"; | |
187 | ||
188 | /* | |
189 | * iucv_handler_list: List of registered handlers. | |
190 | */ | |
191 | static LIST_HEAD(iucv_handler_list); | |
192 | ||
193 | /* | |
194 | * iucv_path_table: an array of iucv_path structures. | |
195 | */ | |
196 | static struct iucv_path **iucv_path_table; | |
197 | static unsigned long iucv_max_pathid; | |
198 | ||
199 | /* | |
200 | * iucv_lock: spinlock protecting iucv_handler_list and iucv_pathid_table | |
201 | */ | |
202 | static DEFINE_SPINLOCK(iucv_table_lock); | |
203 | ||
204 | /* | |
04b090d5 MS |
205 | * iucv_active_cpu: contains the number of the cpu executing the tasklet |
206 | * or the work handler. Needed for iucv_path_sever called from tasklet. | |
2356f4cb | 207 | */ |
04b090d5 | 208 | static int iucv_active_cpu = -1; |
2356f4cb MS |
209 | |
210 | /* | |
211 | * Mutex and wait queue for iucv_register/iucv_unregister. | |
212 | */ | |
213 | static DEFINE_MUTEX(iucv_register_mutex); | |
214 | ||
215 | /* | |
216 | * Counter for number of non-smp capable handlers. | |
217 | */ | |
218 | static int iucv_nonsmp_handler; | |
219 | ||
220 | /* | |
221 | * IUCV control data structure. Used by iucv_path_accept, iucv_path_connect, | |
222 | * iucv_path_quiesce and iucv_path_sever. | |
223 | */ | |
224 | struct iucv_cmd_control { | |
225 | u16 ippathid; | |
226 | u8 ipflags1; | |
227 | u8 iprcode; | |
228 | u16 ipmsglim; | |
229 | u16 res1; | |
230 | u8 ipvmid[8]; | |
231 | u8 ipuser[16]; | |
232 | u8 iptarget[8]; | |
233 | } __attribute__ ((packed,aligned(8))); | |
234 | ||
235 | /* | |
236 | * Data in parameter list iucv structure. Used by iucv_message_send, | |
237 | * iucv_message_send2way and iucv_message_reply. | |
238 | */ | |
239 | struct iucv_cmd_dpl { | |
240 | u16 ippathid; | |
241 | u8 ipflags1; | |
242 | u8 iprcode; | |
243 | u32 ipmsgid; | |
244 | u32 iptrgcls; | |
245 | u8 iprmmsg[8]; | |
246 | u32 ipsrccls; | |
247 | u32 ipmsgtag; | |
248 | u32 ipbfadr2; | |
249 | u32 ipbfln2f; | |
250 | u32 res; | |
251 | } __attribute__ ((packed,aligned(8))); | |
252 | ||
253 | /* | |
254 | * Data in buffer iucv structure. Used by iucv_message_receive, | |
255 | * iucv_message_reject, iucv_message_send, iucv_message_send2way | |
256 | * and iucv_declare_cpu. | |
257 | */ | |
258 | struct iucv_cmd_db { | |
259 | u16 ippathid; | |
260 | u8 ipflags1; | |
261 | u8 iprcode; | |
262 | u32 ipmsgid; | |
263 | u32 iptrgcls; | |
264 | u32 ipbfadr1; | |
265 | u32 ipbfln1f; | |
266 | u32 ipsrccls; | |
267 | u32 ipmsgtag; | |
268 | u32 ipbfadr2; | |
269 | u32 ipbfln2f; | |
270 | u32 res; | |
271 | } __attribute__ ((packed,aligned(8))); | |
272 | ||
273 | /* | |
274 | * Purge message iucv structure. Used by iucv_message_purge. | |
275 | */ | |
276 | struct iucv_cmd_purge { | |
277 | u16 ippathid; | |
278 | u8 ipflags1; | |
279 | u8 iprcode; | |
280 | u32 ipmsgid; | |
281 | u8 ipaudit[3]; | |
282 | u8 res1[5]; | |
283 | u32 res2; | |
284 | u32 ipsrccls; | |
285 | u32 ipmsgtag; | |
286 | u32 res3[3]; | |
287 | } __attribute__ ((packed,aligned(8))); | |
288 | ||
289 | /* | |
290 | * Set mask iucv structure. Used by iucv_enable_cpu. | |
291 | */ | |
292 | struct iucv_cmd_set_mask { | |
293 | u8 ipmask; | |
294 | u8 res1[2]; | |
295 | u8 iprcode; | |
296 | u32 res2[9]; | |
297 | } __attribute__ ((packed,aligned(8))); | |
298 | ||
299 | union iucv_param { | |
300 | struct iucv_cmd_control ctrl; | |
301 | struct iucv_cmd_dpl dpl; | |
302 | struct iucv_cmd_db db; | |
303 | struct iucv_cmd_purge purge; | |
304 | struct iucv_cmd_set_mask set_mask; | |
305 | }; | |
306 | ||
307 | /* | |
308 | * Anchor for per-cpu IUCV command parameter block. | |
309 | */ | |
70cf5035 | 310 | static union iucv_param *iucv_param[NR_CPUS]; |
42e1b4c2 | 311 | static union iucv_param *iucv_param_irq[NR_CPUS]; |
2356f4cb MS |
312 | |
313 | /** | |
314 | * iucv_call_b2f0 | |
315 | * @code: identifier of IUCV call to CP. | |
316 | * @parm: pointer to a struct iucv_parm block | |
317 | * | |
318 | * Calls CP to execute IUCV commands. | |
319 | * | |
320 | * Returns the result of the CP IUCV call. | |
321 | */ | |
322 | static inline int iucv_call_b2f0(int command, union iucv_param *parm) | |
323 | { | |
324 | register unsigned long reg0 asm ("0"); | |
325 | register unsigned long reg1 asm ("1"); | |
326 | int ccode; | |
327 | ||
328 | reg0 = command; | |
329 | reg1 = virt_to_phys(parm); | |
330 | asm volatile( | |
331 | " .long 0xb2f01000\n" | |
332 | " ipm %0\n" | |
333 | " srl %0,28\n" | |
334 | : "=d" (ccode), "=m" (*parm), "+d" (reg0), "+a" (reg1) | |
335 | : "m" (*parm) : "cc"); | |
336 | return (ccode == 1) ? parm->ctrl.iprcode : ccode; | |
337 | } | |
338 | ||
339 | /** | |
340 | * iucv_query_maxconn | |
341 | * | |
342 | * Determines the maximum number of connections that may be established. | |
343 | * | |
344 | * Returns the maximum number of connections or -EPERM is IUCV is not | |
345 | * available. | |
346 | */ | |
347 | static int iucv_query_maxconn(void) | |
348 | { | |
349 | register unsigned long reg0 asm ("0"); | |
350 | register unsigned long reg1 asm ("1"); | |
351 | void *param; | |
352 | int ccode; | |
353 | ||
354 | param = kzalloc(sizeof(union iucv_param), GFP_KERNEL|GFP_DMA); | |
355 | if (!param) | |
356 | return -ENOMEM; | |
357 | reg0 = IUCV_QUERY; | |
358 | reg1 = (unsigned long) param; | |
359 | asm volatile ( | |
360 | " .long 0xb2f01000\n" | |
361 | " ipm %0\n" | |
362 | " srl %0,28\n" | |
363 | : "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc"); | |
364 | if (ccode == 0) | |
b29e4da4 | 365 | iucv_max_pathid = reg1; |
2356f4cb MS |
366 | kfree(param); |
367 | return ccode ? -EPERM : 0; | |
368 | } | |
369 | ||
370 | /** | |
371 | * iucv_allow_cpu | |
372 | * @data: unused | |
373 | * | |
374 | * Allow iucv interrupts on this cpu. | |
375 | */ | |
376 | static void iucv_allow_cpu(void *data) | |
377 | { | |
378 | int cpu = smp_processor_id(); | |
379 | union iucv_param *parm; | |
380 | ||
381 | /* | |
382 | * Enable all iucv interrupts. | |
383 | * ipmask contains bits for the different interrupts | |
384 | * 0x80 - Flag to allow nonpriority message pending interrupts | |
385 | * 0x40 - Flag to allow priority message pending interrupts | |
386 | * 0x20 - Flag to allow nonpriority message completion interrupts | |
387 | * 0x10 - Flag to allow priority message completion interrupts | |
388 | * 0x08 - Flag to allow IUCV control interrupts | |
389 | */ | |
42e1b4c2 | 390 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
391 | memset(parm, 0, sizeof(union iucv_param)); |
392 | parm->set_mask.ipmask = 0xf8; | |
393 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
394 | ||
672e405b UB |
395 | /* |
396 | * Enable all iucv control interrupts. | |
397 | * ipmask contains bits for the different interrupts | |
398 | * 0x80 - Flag to allow pending connections interrupts | |
399 | * 0x40 - Flag to allow connection complete interrupts | |
400 | * 0x20 - Flag to allow connection severed interrupts | |
401 | * 0x10 - Flag to allow connection quiesced interrupts | |
402 | * 0x08 - Flag to allow connection resumed interrupts | |
403 | */ | |
404 | memset(parm, 0, sizeof(union iucv_param)); | |
405 | parm->set_mask.ipmask = 0xf8; | |
406 | iucv_call_b2f0(IUCV_SETCONTROLMASK, parm); | |
2356f4cb MS |
407 | /* Set indication that iucv interrupts are allowed for this cpu. */ |
408 | cpu_set(cpu, iucv_irq_cpumask); | |
409 | } | |
410 | ||
411 | /** | |
412 | * iucv_block_cpu | |
413 | * @data: unused | |
414 | * | |
415 | * Block iucv interrupts on this cpu. | |
416 | */ | |
417 | static void iucv_block_cpu(void *data) | |
418 | { | |
419 | int cpu = smp_processor_id(); | |
420 | union iucv_param *parm; | |
421 | ||
422 | /* Disable all iucv interrupts. */ | |
42e1b4c2 | 423 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
424 | memset(parm, 0, sizeof(union iucv_param)); |
425 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
426 | ||
427 | /* Clear indication that iucv interrupts are allowed for this cpu. */ | |
428 | cpu_clear(cpu, iucv_irq_cpumask); | |
429 | } | |
430 | ||
672e405b UB |
431 | /** |
432 | * iucv_block_cpu_almost | |
433 | * @data: unused | |
434 | * | |
435 | * Allow connection-severed interrupts only on this cpu. | |
436 | */ | |
437 | static void iucv_block_cpu_almost(void *data) | |
438 | { | |
439 | int cpu = smp_processor_id(); | |
440 | union iucv_param *parm; | |
441 | ||
442 | /* Allow iucv control interrupts only */ | |
443 | parm = iucv_param_irq[cpu]; | |
444 | memset(parm, 0, sizeof(union iucv_param)); | |
445 | parm->set_mask.ipmask = 0x08; | |
446 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
447 | /* Allow iucv-severed interrupt only */ | |
448 | memset(parm, 0, sizeof(union iucv_param)); | |
449 | parm->set_mask.ipmask = 0x20; | |
450 | iucv_call_b2f0(IUCV_SETCONTROLMASK, parm); | |
451 | ||
452 | /* Clear indication that iucv interrupts are allowed for this cpu. */ | |
453 | cpu_clear(cpu, iucv_irq_cpumask); | |
454 | } | |
455 | ||
2356f4cb MS |
456 | /** |
457 | * iucv_declare_cpu | |
458 | * @data: unused | |
459 | * | |
3a4fa0a2 | 460 | * Declare a interrupt buffer on this cpu. |
2356f4cb MS |
461 | */ |
462 | static void iucv_declare_cpu(void *data) | |
463 | { | |
464 | int cpu = smp_processor_id(); | |
465 | union iucv_param *parm; | |
466 | int rc; | |
467 | ||
468 | if (cpu_isset(cpu, iucv_buffer_cpumask)) | |
469 | return; | |
470 | ||
471 | /* Declare interrupt buffer. */ | |
42e1b4c2 | 472 | parm = iucv_param_irq[cpu]; |
2356f4cb | 473 | memset(parm, 0, sizeof(union iucv_param)); |
70cf5035 | 474 | parm->db.ipbfadr1 = virt_to_phys(iucv_irq_data[cpu]); |
2356f4cb MS |
475 | rc = iucv_call_b2f0(IUCV_DECLARE_BUFFER, parm); |
476 | if (rc) { | |
477 | char *err = "Unknown"; | |
da99f056 | 478 | switch (rc) { |
2356f4cb MS |
479 | case 0x03: |
480 | err = "Directory error"; | |
481 | break; | |
482 | case 0x0a: | |
483 | err = "Invalid length"; | |
484 | break; | |
485 | case 0x13: | |
486 | err = "Buffer already exists"; | |
487 | break; | |
488 | case 0x3e: | |
489 | err = "Buffer overlap"; | |
490 | break; | |
491 | case 0x5c: | |
492 | err = "Paging or storage error"; | |
493 | break; | |
494 | } | |
8f7c502c UB |
495 | pr_warning("Defining an interrupt buffer on CPU %i" |
496 | " failed with 0x%02x (%s)\n", cpu, rc, err); | |
2356f4cb MS |
497 | return; |
498 | } | |
499 | ||
500 | /* Set indication that an iucv buffer exists for this cpu. */ | |
501 | cpu_set(cpu, iucv_buffer_cpumask); | |
502 | ||
503 | if (iucv_nonsmp_handler == 0 || cpus_empty(iucv_irq_cpumask)) | |
504 | /* Enable iucv interrupts on this cpu. */ | |
505 | iucv_allow_cpu(NULL); | |
506 | else | |
507 | /* Disable iucv interrupts on this cpu. */ | |
508 | iucv_block_cpu(NULL); | |
509 | } | |
510 | ||
511 | /** | |
512 | * iucv_retrieve_cpu | |
513 | * @data: unused | |
514 | * | |
515 | * Retrieve interrupt buffer on this cpu. | |
516 | */ | |
517 | static void iucv_retrieve_cpu(void *data) | |
518 | { | |
519 | int cpu = smp_processor_id(); | |
520 | union iucv_param *parm; | |
521 | ||
522 | if (!cpu_isset(cpu, iucv_buffer_cpumask)) | |
523 | return; | |
524 | ||
525 | /* Block iucv interrupts. */ | |
526 | iucv_block_cpu(NULL); | |
527 | ||
528 | /* Retrieve interrupt buffer. */ | |
42e1b4c2 | 529 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
530 | iucv_call_b2f0(IUCV_RETRIEVE_BUFFER, parm); |
531 | ||
532 | /* Clear indication that an iucv buffer exists for this cpu. */ | |
533 | cpu_clear(cpu, iucv_buffer_cpumask); | |
534 | } | |
535 | ||
536 | /** | |
537 | * iucv_setmask_smp | |
538 | * | |
539 | * Allow iucv interrupts on all cpus. | |
540 | */ | |
541 | static void iucv_setmask_mp(void) | |
542 | { | |
543 | int cpu; | |
544 | ||
7b9d1b22 | 545 | get_online_cpus(); |
2356f4cb MS |
546 | for_each_online_cpu(cpu) |
547 | /* Enable all cpus with a declared buffer. */ | |
548 | if (cpu_isset(cpu, iucv_buffer_cpumask) && | |
549 | !cpu_isset(cpu, iucv_irq_cpumask)) | |
3bb447fc | 550 | smp_call_function_single(cpu, iucv_allow_cpu, |
8691e5a8 | 551 | NULL, 1); |
7b9d1b22 | 552 | put_online_cpus(); |
2356f4cb MS |
553 | } |
554 | ||
555 | /** | |
556 | * iucv_setmask_up | |
557 | * | |
04b090d5 | 558 | * Allow iucv interrupts on a single cpu. |
2356f4cb MS |
559 | */ |
560 | static void iucv_setmask_up(void) | |
561 | { | |
562 | cpumask_t cpumask; | |
563 | int cpu; | |
564 | ||
565 | /* Disable all cpu but the first in cpu_irq_cpumask. */ | |
566 | cpumask = iucv_irq_cpumask; | |
567 | cpu_clear(first_cpu(iucv_irq_cpumask), cpumask); | |
0e12f848 | 568 | for_each_cpu_mask_nr(cpu, cpumask) |
8691e5a8 | 569 | smp_call_function_single(cpu, iucv_block_cpu, NULL, 1); |
2356f4cb MS |
570 | } |
571 | ||
572 | /** | |
573 | * iucv_enable | |
574 | * | |
575 | * This function makes iucv ready for use. It allocates the pathid | |
576 | * table, declares an iucv interrupt buffer and enables the iucv | |
577 | * interrupts. Called when the first user has registered an iucv | |
578 | * handler. | |
579 | */ | |
580 | static int iucv_enable(void) | |
581 | { | |
582 | size_t alloc_size; | |
583 | int cpu, rc; | |
584 | ||
f1d3e4dc | 585 | get_online_cpus(); |
2356f4cb MS |
586 | rc = -ENOMEM; |
587 | alloc_size = iucv_max_pathid * sizeof(struct iucv_path); | |
588 | iucv_path_table = kzalloc(alloc_size, GFP_KERNEL); | |
589 | if (!iucv_path_table) | |
590 | goto out; | |
591 | /* Declare per cpu buffers. */ | |
592 | rc = -EIO; | |
593 | for_each_online_cpu(cpu) | |
8691e5a8 | 594 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
2356f4cb MS |
595 | if (cpus_empty(iucv_buffer_cpumask)) |
596 | /* No cpu could declare an iucv buffer. */ | |
f1d3e4dc | 597 | goto out; |
7b9d1b22 | 598 | put_online_cpus(); |
2356f4cb | 599 | return 0; |
2356f4cb | 600 | out: |
f1d3e4dc HC |
601 | kfree(iucv_path_table); |
602 | iucv_path_table = NULL; | |
603 | put_online_cpus(); | |
2356f4cb MS |
604 | return rc; |
605 | } | |
606 | ||
607 | /** | |
608 | * iucv_disable | |
609 | * | |
610 | * This function shuts down iucv. It disables iucv interrupts, retrieves | |
611 | * the iucv interrupt buffer and frees the pathid table. Called after the | |
612 | * last user unregister its iucv handler. | |
613 | */ | |
614 | static void iucv_disable(void) | |
615 | { | |
8b122efd | 616 | get_online_cpus(); |
15c8b6c1 | 617 | on_each_cpu(iucv_retrieve_cpu, NULL, 1); |
2356f4cb | 618 | kfree(iucv_path_table); |
f1d3e4dc HC |
619 | iucv_path_table = NULL; |
620 | put_online_cpus(); | |
2356f4cb MS |
621 | } |
622 | ||
2356f4cb MS |
623 | static int __cpuinit iucv_cpu_notify(struct notifier_block *self, |
624 | unsigned long action, void *hcpu) | |
625 | { | |
626 | cpumask_t cpumask; | |
627 | long cpu = (long) hcpu; | |
628 | ||
629 | switch (action) { | |
630 | case CPU_UP_PREPARE: | |
8bb78442 | 631 | case CPU_UP_PREPARE_FROZEN: |
70cf5035 CL |
632 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), |
633 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
634 | if (!iucv_irq_data[cpu]) | |
92e99a98 AM |
635 | return notifier_from_errno(-ENOMEM); |
636 | ||
70cf5035 CL |
637 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), |
638 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
d0236f8f AM |
639 | if (!iucv_param[cpu]) { |
640 | kfree(iucv_irq_data[cpu]); | |
641 | iucv_irq_data[cpu] = NULL; | |
92e99a98 | 642 | return notifier_from_errno(-ENOMEM); |
d0236f8f | 643 | } |
42e1b4c2 UB |
644 | iucv_param_irq[cpu] = kmalloc_node(sizeof(union iucv_param), |
645 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
646 | if (!iucv_param_irq[cpu]) { | |
647 | kfree(iucv_param[cpu]); | |
648 | iucv_param[cpu] = NULL; | |
649 | kfree(iucv_irq_data[cpu]); | |
650 | iucv_irq_data[cpu] = NULL; | |
92e99a98 | 651 | return notifier_from_errno(-ENOMEM); |
42e1b4c2 | 652 | } |
2356f4cb MS |
653 | break; |
654 | case CPU_UP_CANCELED: | |
8bb78442 | 655 | case CPU_UP_CANCELED_FROZEN: |
2356f4cb | 656 | case CPU_DEAD: |
8bb78442 | 657 | case CPU_DEAD_FROZEN: |
42e1b4c2 UB |
658 | kfree(iucv_param_irq[cpu]); |
659 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
660 | kfree(iucv_param[cpu]); |
661 | iucv_param[cpu] = NULL; | |
662 | kfree(iucv_irq_data[cpu]); | |
663 | iucv_irq_data[cpu] = NULL; | |
2356f4cb MS |
664 | break; |
665 | case CPU_ONLINE: | |
8bb78442 | 666 | case CPU_ONLINE_FROZEN: |
2356f4cb | 667 | case CPU_DOWN_FAILED: |
8bb78442 | 668 | case CPU_DOWN_FAILED_FROZEN: |
f1d3e4dc HC |
669 | if (!iucv_path_table) |
670 | break; | |
8691e5a8 | 671 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
2356f4cb MS |
672 | break; |
673 | case CPU_DOWN_PREPARE: | |
8bb78442 | 674 | case CPU_DOWN_PREPARE_FROZEN: |
f1d3e4dc HC |
675 | if (!iucv_path_table) |
676 | break; | |
2356f4cb MS |
677 | cpumask = iucv_buffer_cpumask; |
678 | cpu_clear(cpu, cpumask); | |
679 | if (cpus_empty(cpumask)) | |
680 | /* Can't offline last IUCV enabled cpu. */ | |
92e99a98 | 681 | return notifier_from_errno(-EINVAL); |
8691e5a8 | 682 | smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 1); |
2356f4cb | 683 | if (cpus_empty(iucv_irq_cpumask)) |
3bb447fc | 684 | smp_call_function_single(first_cpu(iucv_buffer_cpumask), |
8691e5a8 | 685 | iucv_allow_cpu, NULL, 1); |
2356f4cb MS |
686 | break; |
687 | } | |
688 | return NOTIFY_OK; | |
689 | } | |
690 | ||
f1494ed1 | 691 | static struct notifier_block __refdata iucv_cpu_notifier = { |
2356f4cb MS |
692 | .notifier_call = iucv_cpu_notify, |
693 | }; | |
2356f4cb MS |
694 | |
695 | /** | |
696 | * iucv_sever_pathid | |
697 | * @pathid: path identification number. | |
698 | * @userdata: 16-bytes of user data. | |
699 | * | |
700 | * Sever an iucv path to free up the pathid. Used internally. | |
701 | */ | |
702 | static int iucv_sever_pathid(u16 pathid, u8 userdata[16]) | |
703 | { | |
704 | union iucv_param *parm; | |
705 | ||
42e1b4c2 | 706 | parm = iucv_param_irq[smp_processor_id()]; |
2356f4cb MS |
707 | memset(parm, 0, sizeof(union iucv_param)); |
708 | if (userdata) | |
709 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
710 | parm->ctrl.ippathid = pathid; | |
711 | return iucv_call_b2f0(IUCV_SEVER, parm); | |
712 | } | |
713 | ||
714 | /** | |
04b090d5 | 715 | * __iucv_cleanup_queue |
2356f4cb MS |
716 | * @dummy: unused dummy argument |
717 | * | |
718 | * Nop function called via smp_call_function to force work items from | |
719 | * pending external iucv interrupts to the work queue. | |
720 | */ | |
04b090d5 | 721 | static void __iucv_cleanup_queue(void *dummy) |
2356f4cb MS |
722 | { |
723 | } | |
724 | ||
725 | /** | |
04b090d5 | 726 | * iucv_cleanup_queue |
2356f4cb MS |
727 | * |
728 | * Function called after a path has been severed to find all remaining | |
729 | * work items for the now stale pathid. The caller needs to hold the | |
730 | * iucv_table_lock. | |
731 | */ | |
04b090d5 | 732 | static void iucv_cleanup_queue(void) |
2356f4cb | 733 | { |
04b090d5 | 734 | struct iucv_irq_list *p, *n; |
2356f4cb MS |
735 | |
736 | /* | |
04b090d5 MS |
737 | * When a path is severed, the pathid can be reused immediatly |
738 | * on a iucv connect or a connection pending interrupt. Remove | |
739 | * all entries from the task queue that refer to a stale pathid | |
740 | * (iucv_path_table[ix] == NULL). Only then do the iucv connect | |
741 | * or deliver the connection pending interrupt. To get all the | |
742 | * pending interrupts force them to the work queue by calling | |
743 | * an empty function on all cpus. | |
2356f4cb | 744 | */ |
8691e5a8 | 745 | smp_call_function(__iucv_cleanup_queue, NULL, 1); |
04b090d5 MS |
746 | spin_lock_irq(&iucv_queue_lock); |
747 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) { | |
748 | /* Remove stale work items from the task queue. */ | |
749 | if (iucv_path_table[p->data.ippathid] == NULL) { | |
2356f4cb MS |
750 | list_del(&p->list); |
751 | kfree(p); | |
752 | } | |
753 | } | |
04b090d5 | 754 | spin_unlock_irq(&iucv_queue_lock); |
2356f4cb MS |
755 | } |
756 | ||
757 | /** | |
758 | * iucv_register: | |
759 | * @handler: address of iucv handler structure | |
760 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
761 | * | |
762 | * Registers a driver with IUCV. | |
763 | * | |
764 | * Returns 0 on success, -ENOMEM if the memory allocation for the pathid | |
765 | * table failed, or -EIO if IUCV_DECLARE_BUFFER failed on all cpus. | |
766 | */ | |
767 | int iucv_register(struct iucv_handler *handler, int smp) | |
768 | { | |
769 | int rc; | |
770 | ||
771 | if (!iucv_available) | |
772 | return -ENOSYS; | |
773 | mutex_lock(&iucv_register_mutex); | |
774 | if (!smp) | |
775 | iucv_nonsmp_handler++; | |
776 | if (list_empty(&iucv_handler_list)) { | |
777 | rc = iucv_enable(); | |
778 | if (rc) | |
779 | goto out_mutex; | |
780 | } else if (!smp && iucv_nonsmp_handler == 1) | |
781 | iucv_setmask_up(); | |
782 | INIT_LIST_HEAD(&handler->paths); | |
783 | ||
435bc9df | 784 | spin_lock_bh(&iucv_table_lock); |
2356f4cb | 785 | list_add_tail(&handler->list, &iucv_handler_list); |
435bc9df | 786 | spin_unlock_bh(&iucv_table_lock); |
2356f4cb MS |
787 | rc = 0; |
788 | out_mutex: | |
789 | mutex_unlock(&iucv_register_mutex); | |
790 | return rc; | |
791 | } | |
da99f056 | 792 | EXPORT_SYMBOL(iucv_register); |
2356f4cb MS |
793 | |
794 | /** | |
795 | * iucv_unregister | |
796 | * @handler: address of iucv handler structure | |
797 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
798 | * | |
799 | * Unregister driver from IUCV. | |
800 | */ | |
801 | void iucv_unregister(struct iucv_handler *handler, int smp) | |
802 | { | |
803 | struct iucv_path *p, *n; | |
804 | ||
805 | mutex_lock(&iucv_register_mutex); | |
806 | spin_lock_bh(&iucv_table_lock); | |
807 | /* Remove handler from the iucv_handler_list. */ | |
808 | list_del_init(&handler->list); | |
809 | /* Sever all pathids still refering to the handler. */ | |
810 | list_for_each_entry_safe(p, n, &handler->paths, list) { | |
811 | iucv_sever_pathid(p->pathid, NULL); | |
812 | iucv_path_table[p->pathid] = NULL; | |
813 | list_del(&p->list); | |
2356f4cb MS |
814 | iucv_path_free(p); |
815 | } | |
816 | spin_unlock_bh(&iucv_table_lock); | |
817 | if (!smp) | |
818 | iucv_nonsmp_handler--; | |
819 | if (list_empty(&iucv_handler_list)) | |
820 | iucv_disable(); | |
821 | else if (!smp && iucv_nonsmp_handler == 0) | |
822 | iucv_setmask_mp(); | |
823 | mutex_unlock(&iucv_register_mutex); | |
824 | } | |
da99f056 | 825 | EXPORT_SYMBOL(iucv_unregister); |
2356f4cb | 826 | |
6c005961 UB |
827 | static int iucv_reboot_event(struct notifier_block *this, |
828 | unsigned long event, void *ptr) | |
829 | { | |
830 | int i, rc; | |
831 | ||
832 | get_online_cpus(); | |
833 | on_each_cpu(iucv_block_cpu, NULL, 1); | |
834 | preempt_disable(); | |
835 | for (i = 0; i < iucv_max_pathid; i++) { | |
836 | if (iucv_path_table[i]) | |
837 | rc = iucv_sever_pathid(i, NULL); | |
838 | } | |
839 | preempt_enable(); | |
840 | put_online_cpus(); | |
841 | iucv_disable(); | |
842 | return NOTIFY_DONE; | |
843 | } | |
844 | ||
845 | static struct notifier_block iucv_reboot_notifier = { | |
846 | .notifier_call = iucv_reboot_event, | |
847 | }; | |
848 | ||
2356f4cb MS |
849 | /** |
850 | * iucv_path_accept | |
851 | * @path: address of iucv path structure | |
852 | * @handler: address of iucv handler structure | |
853 | * @userdata: 16 bytes of data reflected to the communication partner | |
854 | * @private: private data passed to interrupt handlers for this path | |
855 | * | |
856 | * This function is issued after the user received a connection pending | |
857 | * external interrupt and now wishes to complete the IUCV communication path. | |
858 | * | |
859 | * Returns the result of the CP IUCV call. | |
860 | */ | |
861 | int iucv_path_accept(struct iucv_path *path, struct iucv_handler *handler, | |
862 | u8 userdata[16], void *private) | |
863 | { | |
864 | union iucv_param *parm; | |
865 | int rc; | |
866 | ||
867 | local_bh_disable(); | |
d28ecab0 | 868 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
869 | rc = -EIO; |
870 | goto out; | |
871 | } | |
2356f4cb | 872 | /* Prepare parameter block. */ |
70cf5035 | 873 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
874 | memset(parm, 0, sizeof(union iucv_param)); |
875 | parm->ctrl.ippathid = path->pathid; | |
876 | parm->ctrl.ipmsglim = path->msglim; | |
877 | if (userdata) | |
878 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
879 | parm->ctrl.ipflags1 = path->flags; | |
880 | ||
881 | rc = iucv_call_b2f0(IUCV_ACCEPT, parm); | |
882 | if (!rc) { | |
883 | path->private = private; | |
884 | path->msglim = parm->ctrl.ipmsglim; | |
885 | path->flags = parm->ctrl.ipflags1; | |
886 | } | |
6c005961 | 887 | out: |
2356f4cb MS |
888 | local_bh_enable(); |
889 | return rc; | |
890 | } | |
da99f056 | 891 | EXPORT_SYMBOL(iucv_path_accept); |
2356f4cb MS |
892 | |
893 | /** | |
894 | * iucv_path_connect | |
895 | * @path: address of iucv path structure | |
896 | * @handler: address of iucv handler structure | |
897 | * @userid: 8-byte user identification | |
898 | * @system: 8-byte target system identification | |
899 | * @userdata: 16 bytes of data reflected to the communication partner | |
900 | * @private: private data passed to interrupt handlers for this path | |
901 | * | |
902 | * This function establishes an IUCV path. Although the connect may complete | |
903 | * successfully, you are not able to use the path until you receive an IUCV | |
904 | * Connection Complete external interrupt. | |
905 | * | |
906 | * Returns the result of the CP IUCV call. | |
907 | */ | |
908 | int iucv_path_connect(struct iucv_path *path, struct iucv_handler *handler, | |
909 | u8 userid[8], u8 system[8], u8 userdata[16], | |
910 | void *private) | |
911 | { | |
912 | union iucv_param *parm; | |
913 | int rc; | |
914 | ||
04b090d5 MS |
915 | spin_lock_bh(&iucv_table_lock); |
916 | iucv_cleanup_queue(); | |
d28ecab0 | 917 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
918 | rc = -EIO; |
919 | goto out; | |
920 | } | |
70cf5035 | 921 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
922 | memset(parm, 0, sizeof(union iucv_param)); |
923 | parm->ctrl.ipmsglim = path->msglim; | |
924 | parm->ctrl.ipflags1 = path->flags; | |
925 | if (userid) { | |
926 | memcpy(parm->ctrl.ipvmid, userid, sizeof(parm->ctrl.ipvmid)); | |
927 | ASCEBC(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
928 | EBC_TOUPPER(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
929 | } | |
930 | if (system) { | |
931 | memcpy(parm->ctrl.iptarget, system, | |
932 | sizeof(parm->ctrl.iptarget)); | |
933 | ASCEBC(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
934 | EBC_TOUPPER(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
935 | } | |
936 | if (userdata) | |
937 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
938 | ||
939 | rc = iucv_call_b2f0(IUCV_CONNECT, parm); | |
940 | if (!rc) { | |
941 | if (parm->ctrl.ippathid < iucv_max_pathid) { | |
942 | path->pathid = parm->ctrl.ippathid; | |
943 | path->msglim = parm->ctrl.ipmsglim; | |
944 | path->flags = parm->ctrl.ipflags1; | |
945 | path->handler = handler; | |
946 | path->private = private; | |
947 | list_add_tail(&path->list, &handler->paths); | |
948 | iucv_path_table[path->pathid] = path; | |
949 | } else { | |
950 | iucv_sever_pathid(parm->ctrl.ippathid, | |
951 | iucv_error_pathid); | |
952 | rc = -EIO; | |
953 | } | |
954 | } | |
6c005961 | 955 | out: |
04b090d5 | 956 | spin_unlock_bh(&iucv_table_lock); |
2356f4cb MS |
957 | return rc; |
958 | } | |
da99f056 | 959 | EXPORT_SYMBOL(iucv_path_connect); |
2356f4cb MS |
960 | |
961 | /** | |
962 | * iucv_path_quiesce: | |
963 | * @path: address of iucv path structure | |
964 | * @userdata: 16 bytes of data reflected to the communication partner | |
965 | * | |
966 | * This function temporarily suspends incoming messages on an IUCV path. | |
967 | * You can later reactivate the path by invoking the iucv_resume function. | |
968 | * | |
969 | * Returns the result from the CP IUCV call. | |
970 | */ | |
971 | int iucv_path_quiesce(struct iucv_path *path, u8 userdata[16]) | |
972 | { | |
973 | union iucv_param *parm; | |
974 | int rc; | |
975 | ||
976 | local_bh_disable(); | |
d28ecab0 | 977 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
978 | rc = -EIO; |
979 | goto out; | |
980 | } | |
70cf5035 | 981 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
982 | memset(parm, 0, sizeof(union iucv_param)); |
983 | if (userdata) | |
984 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
985 | parm->ctrl.ippathid = path->pathid; | |
986 | rc = iucv_call_b2f0(IUCV_QUIESCE, parm); | |
6c005961 | 987 | out: |
2356f4cb MS |
988 | local_bh_enable(); |
989 | return rc; | |
990 | } | |
da99f056 | 991 | EXPORT_SYMBOL(iucv_path_quiesce); |
2356f4cb MS |
992 | |
993 | /** | |
994 | * iucv_path_resume: | |
995 | * @path: address of iucv path structure | |
996 | * @userdata: 16 bytes of data reflected to the communication partner | |
997 | * | |
998 | * This function resumes incoming messages on an IUCV path that has | |
999 | * been stopped with iucv_path_quiesce. | |
1000 | * | |
1001 | * Returns the result from the CP IUCV call. | |
1002 | */ | |
1003 | int iucv_path_resume(struct iucv_path *path, u8 userdata[16]) | |
1004 | { | |
1005 | union iucv_param *parm; | |
1006 | int rc; | |
1007 | ||
1008 | local_bh_disable(); | |
d28ecab0 | 1009 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1010 | rc = -EIO; |
1011 | goto out; | |
1012 | } | |
70cf5035 | 1013 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1014 | memset(parm, 0, sizeof(union iucv_param)); |
1015 | if (userdata) | |
1016 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
1017 | parm->ctrl.ippathid = path->pathid; | |
1018 | rc = iucv_call_b2f0(IUCV_RESUME, parm); | |
6c005961 | 1019 | out: |
2356f4cb MS |
1020 | local_bh_enable(); |
1021 | return rc; | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * iucv_path_sever | |
1026 | * @path: address of iucv path structure | |
1027 | * @userdata: 16 bytes of data reflected to the communication partner | |
1028 | * | |
1029 | * This function terminates an IUCV path. | |
1030 | * | |
1031 | * Returns the result from the CP IUCV call. | |
1032 | */ | |
1033 | int iucv_path_sever(struct iucv_path *path, u8 userdata[16]) | |
1034 | { | |
1035 | int rc; | |
1036 | ||
2356f4cb | 1037 | preempt_disable(); |
d28ecab0 | 1038 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1039 | rc = -EIO; |
1040 | goto out; | |
1041 | } | |
04b090d5 | 1042 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb MS |
1043 | spin_lock_bh(&iucv_table_lock); |
1044 | rc = iucv_sever_pathid(path->pathid, userdata); | |
42e1b4c2 UB |
1045 | iucv_path_table[path->pathid] = NULL; |
1046 | list_del_init(&path->list); | |
04b090d5 | 1047 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb | 1048 | spin_unlock_bh(&iucv_table_lock); |
6c005961 | 1049 | out: |
2356f4cb MS |
1050 | preempt_enable(); |
1051 | return rc; | |
1052 | } | |
da99f056 | 1053 | EXPORT_SYMBOL(iucv_path_sever); |
2356f4cb MS |
1054 | |
1055 | /** | |
1056 | * iucv_message_purge | |
1057 | * @path: address of iucv path structure | |
1058 | * @msg: address of iucv msg structure | |
1059 | * @srccls: source class of message | |
1060 | * | |
1061 | * Cancels a message you have sent. | |
1062 | * | |
1063 | * Returns the result from the CP IUCV call. | |
1064 | */ | |
1065 | int iucv_message_purge(struct iucv_path *path, struct iucv_message *msg, | |
1066 | u32 srccls) | |
1067 | { | |
1068 | union iucv_param *parm; | |
1069 | int rc; | |
1070 | ||
1071 | local_bh_disable(); | |
d28ecab0 | 1072 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1073 | rc = -EIO; |
1074 | goto out; | |
1075 | } | |
70cf5035 | 1076 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1077 | memset(parm, 0, sizeof(union iucv_param)); |
1078 | parm->purge.ippathid = path->pathid; | |
1079 | parm->purge.ipmsgid = msg->id; | |
1080 | parm->purge.ipsrccls = srccls; | |
1081 | parm->purge.ipflags1 = IUCV_IPSRCCLS | IUCV_IPFGMID | IUCV_IPFGPID; | |
1082 | rc = iucv_call_b2f0(IUCV_PURGE, parm); | |
1083 | if (!rc) { | |
1084 | msg->audit = (*(u32 *) &parm->purge.ipaudit) >> 8; | |
1085 | msg->tag = parm->purge.ipmsgtag; | |
1086 | } | |
6c005961 | 1087 | out: |
2356f4cb MS |
1088 | local_bh_enable(); |
1089 | return rc; | |
1090 | } | |
da99f056 | 1091 | EXPORT_SYMBOL(iucv_message_purge); |
2356f4cb MS |
1092 | |
1093 | /** | |
91d5d45e HB |
1094 | * iucv_message_receive_iprmdata |
1095 | * @path: address of iucv path structure | |
1096 | * @msg: address of iucv msg structure | |
1097 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1098 | * @buffer: address of data buffer or address of struct iucv_array | |
1099 | * @size: length of data buffer | |
1100 | * @residual: | |
1101 | * | |
1102 | * Internal function used by iucv_message_receive and __iucv_message_receive | |
1103 | * to receive RMDATA data stored in struct iucv_message. | |
1104 | */ | |
1105 | static int iucv_message_receive_iprmdata(struct iucv_path *path, | |
1106 | struct iucv_message *msg, | |
1107 | u8 flags, void *buffer, | |
1108 | size_t size, size_t *residual) | |
1109 | { | |
1110 | struct iucv_array *array; | |
1111 | u8 *rmmsg; | |
1112 | size_t copy; | |
1113 | ||
1114 | /* | |
1115 | * Message is 8 bytes long and has been stored to the | |
1116 | * message descriptor itself. | |
1117 | */ | |
1118 | if (residual) | |
1119 | *residual = abs(size - 8); | |
1120 | rmmsg = msg->rmmsg; | |
1121 | if (flags & IUCV_IPBUFLST) { | |
1122 | /* Copy to struct iucv_array. */ | |
1123 | size = (size < 8) ? size : 8; | |
1124 | for (array = buffer; size > 0; array++) { | |
1125 | copy = min_t(size_t, size, array->length); | |
1126 | memcpy((u8 *)(addr_t) array->address, | |
1127 | rmmsg, copy); | |
1128 | rmmsg += copy; | |
1129 | size -= copy; | |
1130 | } | |
1131 | } else { | |
1132 | /* Copy to direct buffer. */ | |
1133 | memcpy(buffer, rmmsg, min_t(size_t, size, 8)); | |
1134 | } | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * __iucv_message_receive | |
2356f4cb MS |
1140 | * @path: address of iucv path structure |
1141 | * @msg: address of iucv msg structure | |
1142 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1143 | * @buffer: address of data buffer or address of struct iucv_array | |
1144 | * @size: length of data buffer | |
1145 | * @residual: | |
1146 | * | |
1147 | * This function receives messages that are being sent to you over | |
1148 | * established paths. This function will deal with RMDATA messages | |
1149 | * embedded in struct iucv_message as well. | |
1150 | * | |
91d5d45e HB |
1151 | * Locking: no locking |
1152 | * | |
2356f4cb MS |
1153 | * Returns the result from the CP IUCV call. |
1154 | */ | |
91d5d45e HB |
1155 | int __iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, |
1156 | u8 flags, void *buffer, size_t size, size_t *residual) | |
2356f4cb MS |
1157 | { |
1158 | union iucv_param *parm; | |
2356f4cb MS |
1159 | int rc; |
1160 | ||
91d5d45e HB |
1161 | if (msg->flags & IUCV_IPRMDATA) |
1162 | return iucv_message_receive_iprmdata(path, msg, flags, | |
1163 | buffer, size, residual); | |
d28ecab0 | 1164 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1165 | rc = -EIO; |
1166 | goto out; | |
1167 | } | |
70cf5035 | 1168 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1169 | memset(parm, 0, sizeof(union iucv_param)); |
1170 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1171 | parm->db.ipbfln1f = (u32) size; | |
1172 | parm->db.ipmsgid = msg->id; | |
1173 | parm->db.ippathid = path->pathid; | |
1174 | parm->db.iptrgcls = msg->class; | |
1175 | parm->db.ipflags1 = (flags | IUCV_IPFGPID | | |
1176 | IUCV_IPFGMID | IUCV_IPTRGCLS); | |
1177 | rc = iucv_call_b2f0(IUCV_RECEIVE, parm); | |
1178 | if (!rc || rc == 5) { | |
1179 | msg->flags = parm->db.ipflags1; | |
1180 | if (residual) | |
1181 | *residual = parm->db.ipbfln1f; | |
1182 | } | |
6c005961 | 1183 | out: |
91d5d45e HB |
1184 | return rc; |
1185 | } | |
1186 | EXPORT_SYMBOL(__iucv_message_receive); | |
1187 | ||
1188 | /** | |
1189 | * iucv_message_receive | |
1190 | * @path: address of iucv path structure | |
1191 | * @msg: address of iucv msg structure | |
1192 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1193 | * @buffer: address of data buffer or address of struct iucv_array | |
1194 | * @size: length of data buffer | |
1195 | * @residual: | |
1196 | * | |
1197 | * This function receives messages that are being sent to you over | |
1198 | * established paths. This function will deal with RMDATA messages | |
1199 | * embedded in struct iucv_message as well. | |
1200 | * | |
1201 | * Locking: local_bh_enable/local_bh_disable | |
1202 | * | |
1203 | * Returns the result from the CP IUCV call. | |
1204 | */ | |
1205 | int iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, | |
1206 | u8 flags, void *buffer, size_t size, size_t *residual) | |
1207 | { | |
1208 | int rc; | |
1209 | ||
1210 | if (msg->flags & IUCV_IPRMDATA) | |
1211 | return iucv_message_receive_iprmdata(path, msg, flags, | |
1212 | buffer, size, residual); | |
1213 | local_bh_disable(); | |
1214 | rc = __iucv_message_receive(path, msg, flags, buffer, size, residual); | |
2356f4cb MS |
1215 | local_bh_enable(); |
1216 | return rc; | |
1217 | } | |
da99f056 | 1218 | EXPORT_SYMBOL(iucv_message_receive); |
2356f4cb MS |
1219 | |
1220 | /** | |
1221 | * iucv_message_reject | |
1222 | * @path: address of iucv path structure | |
1223 | * @msg: address of iucv msg structure | |
1224 | * | |
1225 | * The reject function refuses a specified message. Between the time you | |
1226 | * are notified of a message and the time that you complete the message, | |
1227 | * the message may be rejected. | |
1228 | * | |
1229 | * Returns the result from the CP IUCV call. | |
1230 | */ | |
1231 | int iucv_message_reject(struct iucv_path *path, struct iucv_message *msg) | |
1232 | { | |
1233 | union iucv_param *parm; | |
1234 | int rc; | |
1235 | ||
1236 | local_bh_disable(); | |
d28ecab0 | 1237 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1238 | rc = -EIO; |
1239 | goto out; | |
1240 | } | |
70cf5035 | 1241 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1242 | memset(parm, 0, sizeof(union iucv_param)); |
1243 | parm->db.ippathid = path->pathid; | |
1244 | parm->db.ipmsgid = msg->id; | |
1245 | parm->db.iptrgcls = msg->class; | |
1246 | parm->db.ipflags1 = (IUCV_IPTRGCLS | IUCV_IPFGMID | IUCV_IPFGPID); | |
1247 | rc = iucv_call_b2f0(IUCV_REJECT, parm); | |
6c005961 | 1248 | out: |
2356f4cb MS |
1249 | local_bh_enable(); |
1250 | return rc; | |
1251 | } | |
da99f056 | 1252 | EXPORT_SYMBOL(iucv_message_reject); |
2356f4cb MS |
1253 | |
1254 | /** | |
1255 | * iucv_message_reply | |
1256 | * @path: address of iucv path structure | |
1257 | * @msg: address of iucv msg structure | |
1258 | * @flags: how the reply is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1259 | * @reply: address of reply data buffer or address of struct iucv_array | |
1260 | * @size: length of reply data buffer | |
1261 | * | |
1262 | * This function responds to the two-way messages that you receive. You | |
1263 | * must identify completely the message to which you wish to reply. ie, | |
1264 | * pathid, msgid, and trgcls. Prmmsg signifies the data is moved into | |
1265 | * the parameter list. | |
1266 | * | |
1267 | * Returns the result from the CP IUCV call. | |
1268 | */ | |
1269 | int iucv_message_reply(struct iucv_path *path, struct iucv_message *msg, | |
1270 | u8 flags, void *reply, size_t size) | |
1271 | { | |
1272 | union iucv_param *parm; | |
1273 | int rc; | |
1274 | ||
1275 | local_bh_disable(); | |
d28ecab0 | 1276 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1277 | rc = -EIO; |
1278 | goto out; | |
1279 | } | |
70cf5035 | 1280 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1281 | memset(parm, 0, sizeof(union iucv_param)); |
1282 | if (flags & IUCV_IPRMDATA) { | |
1283 | parm->dpl.ippathid = path->pathid; | |
1284 | parm->dpl.ipflags1 = flags; | |
1285 | parm->dpl.ipmsgid = msg->id; | |
1286 | parm->dpl.iptrgcls = msg->class; | |
1287 | memcpy(parm->dpl.iprmmsg, reply, min_t(size_t, size, 8)); | |
1288 | } else { | |
1289 | parm->db.ipbfadr1 = (u32)(addr_t) reply; | |
1290 | parm->db.ipbfln1f = (u32) size; | |
1291 | parm->db.ippathid = path->pathid; | |
1292 | parm->db.ipflags1 = flags; | |
1293 | parm->db.ipmsgid = msg->id; | |
1294 | parm->db.iptrgcls = msg->class; | |
1295 | } | |
1296 | rc = iucv_call_b2f0(IUCV_REPLY, parm); | |
6c005961 | 1297 | out: |
2356f4cb MS |
1298 | local_bh_enable(); |
1299 | return rc; | |
1300 | } | |
da99f056 | 1301 | EXPORT_SYMBOL(iucv_message_reply); |
2356f4cb MS |
1302 | |
1303 | /** | |
91d5d45e | 1304 | * __iucv_message_send |
2356f4cb MS |
1305 | * @path: address of iucv path structure |
1306 | * @msg: address of iucv msg structure | |
1307 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1308 | * @srccls: source class of message | |
1309 | * @buffer: address of send buffer or address of struct iucv_array | |
1310 | * @size: length of send buffer | |
1311 | * | |
1312 | * This function transmits data to another application. Data to be | |
1313 | * transmitted is in a buffer and this is a one-way message and the | |
1314 | * receiver will not reply to the message. | |
1315 | * | |
91d5d45e HB |
1316 | * Locking: no locking |
1317 | * | |
2356f4cb MS |
1318 | * Returns the result from the CP IUCV call. |
1319 | */ | |
91d5d45e | 1320 | int __iucv_message_send(struct iucv_path *path, struct iucv_message *msg, |
2356f4cb MS |
1321 | u8 flags, u32 srccls, void *buffer, size_t size) |
1322 | { | |
1323 | union iucv_param *parm; | |
1324 | int rc; | |
1325 | ||
d28ecab0 | 1326 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1327 | rc = -EIO; |
1328 | goto out; | |
1329 | } | |
70cf5035 | 1330 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1331 | memset(parm, 0, sizeof(union iucv_param)); |
1332 | if (flags & IUCV_IPRMDATA) { | |
1333 | /* Message of 8 bytes can be placed into the parameter list. */ | |
1334 | parm->dpl.ippathid = path->pathid; | |
1335 | parm->dpl.ipflags1 = flags | IUCV_IPNORPY; | |
1336 | parm->dpl.iptrgcls = msg->class; | |
1337 | parm->dpl.ipsrccls = srccls; | |
1338 | parm->dpl.ipmsgtag = msg->tag; | |
1339 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1340 | } else { | |
1341 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1342 | parm->db.ipbfln1f = (u32) size; | |
1343 | parm->db.ippathid = path->pathid; | |
1344 | parm->db.ipflags1 = flags | IUCV_IPNORPY; | |
1345 | parm->db.iptrgcls = msg->class; | |
1346 | parm->db.ipsrccls = srccls; | |
1347 | parm->db.ipmsgtag = msg->tag; | |
1348 | } | |
1349 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1350 | if (!rc) | |
1351 | msg->id = parm->db.ipmsgid; | |
6c005961 | 1352 | out: |
91d5d45e HB |
1353 | return rc; |
1354 | } | |
1355 | EXPORT_SYMBOL(__iucv_message_send); | |
1356 | ||
1357 | /** | |
1358 | * iucv_message_send | |
1359 | * @path: address of iucv path structure | |
1360 | * @msg: address of iucv msg structure | |
1361 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1362 | * @srccls: source class of message | |
1363 | * @buffer: address of send buffer or address of struct iucv_array | |
1364 | * @size: length of send buffer | |
1365 | * | |
1366 | * This function transmits data to another application. Data to be | |
1367 | * transmitted is in a buffer and this is a one-way message and the | |
1368 | * receiver will not reply to the message. | |
1369 | * | |
1370 | * Locking: local_bh_enable/local_bh_disable | |
1371 | * | |
1372 | * Returns the result from the CP IUCV call. | |
1373 | */ | |
1374 | int iucv_message_send(struct iucv_path *path, struct iucv_message *msg, | |
1375 | u8 flags, u32 srccls, void *buffer, size_t size) | |
1376 | { | |
1377 | int rc; | |
1378 | ||
1379 | local_bh_disable(); | |
1380 | rc = __iucv_message_send(path, msg, flags, srccls, buffer, size); | |
2356f4cb MS |
1381 | local_bh_enable(); |
1382 | return rc; | |
1383 | } | |
da99f056 | 1384 | EXPORT_SYMBOL(iucv_message_send); |
2356f4cb MS |
1385 | |
1386 | /** | |
1387 | * iucv_message_send2way | |
1388 | * @path: address of iucv path structure | |
1389 | * @msg: address of iucv msg structure | |
1390 | * @flags: how the message is sent and the reply is received | |
1391 | * (IUCV_IPRMDATA, IUCV_IPBUFLST, IUCV_IPPRTY, IUCV_ANSLST) | |
1392 | * @srccls: source class of message | |
1393 | * @buffer: address of send buffer or address of struct iucv_array | |
1394 | * @size: length of send buffer | |
1395 | * @ansbuf: address of answer buffer or address of struct iucv_array | |
1396 | * @asize: size of reply buffer | |
1397 | * | |
1398 | * This function transmits data to another application. Data to be | |
1399 | * transmitted is in a buffer. The receiver of the send is expected to | |
1400 | * reply to the message and a buffer is provided into which IUCV moves | |
1401 | * the reply to this message. | |
1402 | * | |
1403 | * Returns the result from the CP IUCV call. | |
1404 | */ | |
1405 | int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg, | |
1406 | u8 flags, u32 srccls, void *buffer, size_t size, | |
1407 | void *answer, size_t asize, size_t *residual) | |
1408 | { | |
1409 | union iucv_param *parm; | |
1410 | int rc; | |
1411 | ||
1412 | local_bh_disable(); | |
d28ecab0 | 1413 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1414 | rc = -EIO; |
1415 | goto out; | |
1416 | } | |
70cf5035 | 1417 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1418 | memset(parm, 0, sizeof(union iucv_param)); |
1419 | if (flags & IUCV_IPRMDATA) { | |
1420 | parm->dpl.ippathid = path->pathid; | |
1421 | parm->dpl.ipflags1 = path->flags; /* priority message */ | |
1422 | parm->dpl.iptrgcls = msg->class; | |
1423 | parm->dpl.ipsrccls = srccls; | |
1424 | parm->dpl.ipmsgtag = msg->tag; | |
1425 | parm->dpl.ipbfadr2 = (u32)(addr_t) answer; | |
1426 | parm->dpl.ipbfln2f = (u32) asize; | |
1427 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1428 | } else { | |
1429 | parm->db.ippathid = path->pathid; | |
1430 | parm->db.ipflags1 = path->flags; /* priority message */ | |
1431 | parm->db.iptrgcls = msg->class; | |
1432 | parm->db.ipsrccls = srccls; | |
1433 | parm->db.ipmsgtag = msg->tag; | |
1434 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1435 | parm->db.ipbfln1f = (u32) size; | |
1436 | parm->db.ipbfadr2 = (u32)(addr_t) answer; | |
1437 | parm->db.ipbfln2f = (u32) asize; | |
1438 | } | |
1439 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1440 | if (!rc) | |
1441 | msg->id = parm->db.ipmsgid; | |
6c005961 | 1442 | out: |
2356f4cb MS |
1443 | local_bh_enable(); |
1444 | return rc; | |
1445 | } | |
da99f056 | 1446 | EXPORT_SYMBOL(iucv_message_send2way); |
2356f4cb MS |
1447 | |
1448 | /** | |
1449 | * iucv_path_pending | |
1450 | * @data: Pointer to external interrupt buffer | |
1451 | * | |
1452 | * Process connection pending work item. Called from tasklet while holding | |
1453 | * iucv_table_lock. | |
1454 | */ | |
1455 | struct iucv_path_pending { | |
1456 | u16 ippathid; | |
1457 | u8 ipflags1; | |
1458 | u8 iptype; | |
1459 | u16 ipmsglim; | |
1460 | u16 res1; | |
1461 | u8 ipvmid[8]; | |
1462 | u8 ipuser[16]; | |
1463 | u32 res3; | |
1464 | u8 ippollfg; | |
1465 | u8 res4[3]; | |
bc10502d | 1466 | } __packed; |
2356f4cb MS |
1467 | |
1468 | static void iucv_path_pending(struct iucv_irq_data *data) | |
1469 | { | |
1470 | struct iucv_path_pending *ipp = (void *) data; | |
1471 | struct iucv_handler *handler; | |
1472 | struct iucv_path *path; | |
1473 | char *error; | |
1474 | ||
1475 | BUG_ON(iucv_path_table[ipp->ippathid]); | |
1476 | /* New pathid, handler found. Create a new path struct. */ | |
1477 | error = iucv_error_no_memory; | |
1478 | path = iucv_path_alloc(ipp->ipmsglim, ipp->ipflags1, GFP_ATOMIC); | |
1479 | if (!path) | |
1480 | goto out_sever; | |
1481 | path->pathid = ipp->ippathid; | |
1482 | iucv_path_table[path->pathid] = path; | |
1483 | EBCASC(ipp->ipvmid, 8); | |
1484 | ||
1485 | /* Call registered handler until one is found that wants the path. */ | |
1486 | list_for_each_entry(handler, &iucv_handler_list, list) { | |
1487 | if (!handler->path_pending) | |
1488 | continue; | |
1489 | /* | |
1490 | * Add path to handler to allow a call to iucv_path_sever | |
1491 | * inside the path_pending function. If the handler returns | |
1492 | * an error remove the path from the handler again. | |
1493 | */ | |
1494 | list_add(&path->list, &handler->paths); | |
1495 | path->handler = handler; | |
1496 | if (!handler->path_pending(path, ipp->ipvmid, ipp->ipuser)) | |
1497 | return; | |
1498 | list_del(&path->list); | |
1499 | path->handler = NULL; | |
1500 | } | |
1501 | /* No handler wanted the path. */ | |
1502 | iucv_path_table[path->pathid] = NULL; | |
1503 | iucv_path_free(path); | |
1504 | error = iucv_error_no_listener; | |
1505 | out_sever: | |
1506 | iucv_sever_pathid(ipp->ippathid, error); | |
1507 | } | |
1508 | ||
1509 | /** | |
1510 | * iucv_path_complete | |
1511 | * @data: Pointer to external interrupt buffer | |
1512 | * | |
1513 | * Process connection complete work item. Called from tasklet while holding | |
1514 | * iucv_table_lock. | |
1515 | */ | |
1516 | struct iucv_path_complete { | |
1517 | u16 ippathid; | |
1518 | u8 ipflags1; | |
1519 | u8 iptype; | |
1520 | u16 ipmsglim; | |
1521 | u16 res1; | |
1522 | u8 res2[8]; | |
1523 | u8 ipuser[16]; | |
1524 | u32 res3; | |
1525 | u8 ippollfg; | |
1526 | u8 res4[3]; | |
bc10502d | 1527 | } __packed; |
2356f4cb MS |
1528 | |
1529 | static void iucv_path_complete(struct iucv_irq_data *data) | |
1530 | { | |
1531 | struct iucv_path_complete *ipc = (void *) data; | |
1532 | struct iucv_path *path = iucv_path_table[ipc->ippathid]; | |
1533 | ||
b8942e3b HB |
1534 | if (path) |
1535 | path->flags = ipc->ipflags1; | |
04b090d5 | 1536 | if (path && path->handler && path->handler->path_complete) |
2356f4cb MS |
1537 | path->handler->path_complete(path, ipc->ipuser); |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * iucv_path_severed | |
1542 | * @data: Pointer to external interrupt buffer | |
1543 | * | |
1544 | * Process connection severed work item. Called from tasklet while holding | |
1545 | * iucv_table_lock. | |
1546 | */ | |
1547 | struct iucv_path_severed { | |
1548 | u16 ippathid; | |
1549 | u8 res1; | |
1550 | u8 iptype; | |
1551 | u32 res2; | |
1552 | u8 res3[8]; | |
1553 | u8 ipuser[16]; | |
1554 | u32 res4; | |
1555 | u8 ippollfg; | |
1556 | u8 res5[3]; | |
bc10502d | 1557 | } __packed; |
2356f4cb MS |
1558 | |
1559 | static void iucv_path_severed(struct iucv_irq_data *data) | |
1560 | { | |
1561 | struct iucv_path_severed *ips = (void *) data; | |
1562 | struct iucv_path *path = iucv_path_table[ips->ippathid]; | |
1563 | ||
04b090d5 MS |
1564 | if (!path || !path->handler) /* Already severed */ |
1565 | return; | |
2356f4cb MS |
1566 | if (path->handler->path_severed) |
1567 | path->handler->path_severed(path, ips->ipuser); | |
1568 | else { | |
1569 | iucv_sever_pathid(path->pathid, NULL); | |
1570 | iucv_path_table[path->pathid] = NULL; | |
42e1b4c2 | 1571 | list_del(&path->list); |
2356f4cb MS |
1572 | iucv_path_free(path); |
1573 | } | |
1574 | } | |
1575 | ||
1576 | /** | |
1577 | * iucv_path_quiesced | |
1578 | * @data: Pointer to external interrupt buffer | |
1579 | * | |
1580 | * Process connection quiesced work item. Called from tasklet while holding | |
1581 | * iucv_table_lock. | |
1582 | */ | |
1583 | struct iucv_path_quiesced { | |
1584 | u16 ippathid; | |
1585 | u8 res1; | |
1586 | u8 iptype; | |
1587 | u32 res2; | |
1588 | u8 res3[8]; | |
1589 | u8 ipuser[16]; | |
1590 | u32 res4; | |
1591 | u8 ippollfg; | |
1592 | u8 res5[3]; | |
bc10502d | 1593 | } __packed; |
2356f4cb MS |
1594 | |
1595 | static void iucv_path_quiesced(struct iucv_irq_data *data) | |
1596 | { | |
1597 | struct iucv_path_quiesced *ipq = (void *) data; | |
1598 | struct iucv_path *path = iucv_path_table[ipq->ippathid]; | |
1599 | ||
04b090d5 | 1600 | if (path && path->handler && path->handler->path_quiesced) |
2356f4cb MS |
1601 | path->handler->path_quiesced(path, ipq->ipuser); |
1602 | } | |
1603 | ||
1604 | /** | |
1605 | * iucv_path_resumed | |
1606 | * @data: Pointer to external interrupt buffer | |
1607 | * | |
1608 | * Process connection resumed work item. Called from tasklet while holding | |
1609 | * iucv_table_lock. | |
1610 | */ | |
1611 | struct iucv_path_resumed { | |
1612 | u16 ippathid; | |
1613 | u8 res1; | |
1614 | u8 iptype; | |
1615 | u32 res2; | |
1616 | u8 res3[8]; | |
1617 | u8 ipuser[16]; | |
1618 | u32 res4; | |
1619 | u8 ippollfg; | |
1620 | u8 res5[3]; | |
bc10502d | 1621 | } __packed; |
2356f4cb MS |
1622 | |
1623 | static void iucv_path_resumed(struct iucv_irq_data *data) | |
1624 | { | |
1625 | struct iucv_path_resumed *ipr = (void *) data; | |
1626 | struct iucv_path *path = iucv_path_table[ipr->ippathid]; | |
1627 | ||
04b090d5 | 1628 | if (path && path->handler && path->handler->path_resumed) |
2356f4cb MS |
1629 | path->handler->path_resumed(path, ipr->ipuser); |
1630 | } | |
1631 | ||
1632 | /** | |
1633 | * iucv_message_complete | |
1634 | * @data: Pointer to external interrupt buffer | |
1635 | * | |
1636 | * Process message complete work item. Called from tasklet while holding | |
1637 | * iucv_table_lock. | |
1638 | */ | |
1639 | struct iucv_message_complete { | |
1640 | u16 ippathid; | |
1641 | u8 ipflags1; | |
1642 | u8 iptype; | |
1643 | u32 ipmsgid; | |
1644 | u32 ipaudit; | |
1645 | u8 iprmmsg[8]; | |
1646 | u32 ipsrccls; | |
1647 | u32 ipmsgtag; | |
1648 | u32 res; | |
1649 | u32 ipbfln2f; | |
1650 | u8 ippollfg; | |
1651 | u8 res2[3]; | |
bc10502d | 1652 | } __packed; |
2356f4cb MS |
1653 | |
1654 | static void iucv_message_complete(struct iucv_irq_data *data) | |
1655 | { | |
1656 | struct iucv_message_complete *imc = (void *) data; | |
1657 | struct iucv_path *path = iucv_path_table[imc->ippathid]; | |
1658 | struct iucv_message msg; | |
1659 | ||
04b090d5 | 1660 | if (path && path->handler && path->handler->message_complete) { |
2356f4cb MS |
1661 | msg.flags = imc->ipflags1; |
1662 | msg.id = imc->ipmsgid; | |
1663 | msg.audit = imc->ipaudit; | |
1664 | memcpy(msg.rmmsg, imc->iprmmsg, 8); | |
1665 | msg.class = imc->ipsrccls; | |
1666 | msg.tag = imc->ipmsgtag; | |
1667 | msg.length = imc->ipbfln2f; | |
1668 | path->handler->message_complete(path, &msg); | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | /** | |
1673 | * iucv_message_pending | |
1674 | * @data: Pointer to external interrupt buffer | |
1675 | * | |
1676 | * Process message pending work item. Called from tasklet while holding | |
1677 | * iucv_table_lock. | |
1678 | */ | |
1679 | struct iucv_message_pending { | |
1680 | u16 ippathid; | |
1681 | u8 ipflags1; | |
1682 | u8 iptype; | |
1683 | u32 ipmsgid; | |
1684 | u32 iptrgcls; | |
1685 | union { | |
1686 | u32 iprmmsg1_u32; | |
1687 | u8 iprmmsg1[4]; | |
1688 | } ln1msg1; | |
1689 | union { | |
1690 | u32 ipbfln1f; | |
1691 | u8 iprmmsg2[4]; | |
1692 | } ln1msg2; | |
1693 | u32 res1[3]; | |
1694 | u32 ipbfln2f; | |
1695 | u8 ippollfg; | |
1696 | u8 res2[3]; | |
bc10502d | 1697 | } __packed; |
2356f4cb MS |
1698 | |
1699 | static void iucv_message_pending(struct iucv_irq_data *data) | |
1700 | { | |
1701 | struct iucv_message_pending *imp = (void *) data; | |
1702 | struct iucv_path *path = iucv_path_table[imp->ippathid]; | |
1703 | struct iucv_message msg; | |
1704 | ||
04b090d5 | 1705 | if (path && path->handler && path->handler->message_pending) { |
2356f4cb MS |
1706 | msg.flags = imp->ipflags1; |
1707 | msg.id = imp->ipmsgid; | |
1708 | msg.class = imp->iptrgcls; | |
1709 | if (imp->ipflags1 & IUCV_IPRMDATA) { | |
1710 | memcpy(msg.rmmsg, imp->ln1msg1.iprmmsg1, 8); | |
1711 | msg.length = 8; | |
1712 | } else | |
1713 | msg.length = imp->ln1msg2.ipbfln1f; | |
1714 | msg.reply_size = imp->ipbfln2f; | |
1715 | path->handler->message_pending(path, &msg); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | /** | |
04b090d5 | 1720 | * iucv_tasklet_fn: |
2356f4cb MS |
1721 | * |
1722 | * This tasklet loops over the queue of irq buffers created by | |
1723 | * iucv_external_interrupt, calls the appropriate action handler | |
1724 | * and then frees the buffer. | |
1725 | */ | |
04b090d5 | 1726 | static void iucv_tasklet_fn(unsigned long ignored) |
2356f4cb MS |
1727 | { |
1728 | typedef void iucv_irq_fn(struct iucv_irq_data *); | |
1729 | static iucv_irq_fn *irq_fn[] = { | |
2356f4cb MS |
1730 | [0x02] = iucv_path_complete, |
1731 | [0x03] = iucv_path_severed, | |
1732 | [0x04] = iucv_path_quiesced, | |
1733 | [0x05] = iucv_path_resumed, | |
1734 | [0x06] = iucv_message_complete, | |
1735 | [0x07] = iucv_message_complete, | |
1736 | [0x08] = iucv_message_pending, | |
1737 | [0x09] = iucv_message_pending, | |
1738 | }; | |
b5e78337 | 1739 | LIST_HEAD(task_queue); |
04b090d5 | 1740 | struct iucv_irq_list *p, *n; |
2356f4cb MS |
1741 | |
1742 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
13fdc9a7 UB |
1743 | if (!spin_trylock(&iucv_table_lock)) { |
1744 | tasklet_schedule(&iucv_tasklet); | |
1745 | return; | |
1746 | } | |
04b090d5 | 1747 | iucv_active_cpu = smp_processor_id(); |
2356f4cb | 1748 | |
04b090d5 MS |
1749 | spin_lock_irq(&iucv_queue_lock); |
1750 | list_splice_init(&iucv_task_queue, &task_queue); | |
1751 | spin_unlock_irq(&iucv_queue_lock); | |
1752 | ||
1753 | list_for_each_entry_safe(p, n, &task_queue, list) { | |
2356f4cb | 1754 | list_del_init(&p->list); |
2356f4cb MS |
1755 | irq_fn[p->data.iptype](&p->data); |
1756 | kfree(p); | |
2356f4cb | 1757 | } |
2356f4cb | 1758 | |
04b090d5 | 1759 | iucv_active_cpu = -1; |
2356f4cb MS |
1760 | spin_unlock(&iucv_table_lock); |
1761 | } | |
1762 | ||
04b090d5 MS |
1763 | /** |
1764 | * iucv_work_fn: | |
1765 | * | |
1766 | * This work function loops over the queue of path pending irq blocks | |
1767 | * created by iucv_external_interrupt, calls the appropriate action | |
1768 | * handler and then frees the buffer. | |
1769 | */ | |
1770 | static void iucv_work_fn(struct work_struct *work) | |
1771 | { | |
b5e78337 | 1772 | LIST_HEAD(work_queue); |
04b090d5 MS |
1773 | struct iucv_irq_list *p, *n; |
1774 | ||
1775 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
1776 | spin_lock_bh(&iucv_table_lock); | |
1777 | iucv_active_cpu = smp_processor_id(); | |
1778 | ||
1779 | spin_lock_irq(&iucv_queue_lock); | |
1780 | list_splice_init(&iucv_work_queue, &work_queue); | |
1781 | spin_unlock_irq(&iucv_queue_lock); | |
1782 | ||
1783 | iucv_cleanup_queue(); | |
1784 | list_for_each_entry_safe(p, n, &work_queue, list) { | |
1785 | list_del_init(&p->list); | |
1786 | iucv_path_pending(&p->data); | |
1787 | kfree(p); | |
1788 | } | |
1789 | ||
1790 | iucv_active_cpu = -1; | |
1791 | spin_unlock_bh(&iucv_table_lock); | |
1792 | } | |
1793 | ||
2356f4cb MS |
1794 | /** |
1795 | * iucv_external_interrupt | |
1796 | * @code: irq code | |
1797 | * | |
1798 | * Handles external interrupts coming in from CP. | |
04b090d5 | 1799 | * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn(). |
2356f4cb MS |
1800 | */ |
1801 | static void iucv_external_interrupt(u16 code) | |
1802 | { | |
1803 | struct iucv_irq_data *p; | |
04b090d5 | 1804 | struct iucv_irq_list *work; |
2356f4cb | 1805 | |
70cf5035 | 1806 | p = iucv_irq_data[smp_processor_id()]; |
2356f4cb | 1807 | if (p->ippathid >= iucv_max_pathid) { |
c2b4afd2 | 1808 | WARN_ON(p->ippathid >= iucv_max_pathid); |
2356f4cb MS |
1809 | iucv_sever_pathid(p->ippathid, iucv_error_no_listener); |
1810 | return; | |
1811 | } | |
c2b4afd2 | 1812 | BUG_ON(p->iptype < 0x01 || p->iptype > 0x09); |
04b090d5 | 1813 | work = kmalloc(sizeof(struct iucv_irq_list), GFP_ATOMIC); |
2356f4cb | 1814 | if (!work) { |
8f7c502c | 1815 | pr_warning("iucv_external_interrupt: out of memory\n"); |
2356f4cb MS |
1816 | return; |
1817 | } | |
1818 | memcpy(&work->data, p, sizeof(work->data)); | |
04b090d5 MS |
1819 | spin_lock(&iucv_queue_lock); |
1820 | if (p->iptype == 0x01) { | |
1821 | /* Path pending interrupt. */ | |
1822 | list_add_tail(&work->list, &iucv_work_queue); | |
1823 | schedule_work(&iucv_work); | |
1824 | } else { | |
1825 | /* The other interrupts. */ | |
1826 | list_add_tail(&work->list, &iucv_task_queue); | |
1827 | tasklet_schedule(&iucv_tasklet); | |
1828 | } | |
1829 | spin_unlock(&iucv_queue_lock); | |
2356f4cb MS |
1830 | } |
1831 | ||
672e405b UB |
1832 | static int iucv_pm_prepare(struct device *dev) |
1833 | { | |
1834 | int rc = 0; | |
1835 | ||
1836 | #ifdef CONFIG_PM_DEBUG | |
1837 | printk(KERN_INFO "iucv_pm_prepare\n"); | |
1838 | #endif | |
1839 | if (dev->driver && dev->driver->pm && dev->driver->pm->prepare) | |
1840 | rc = dev->driver->pm->prepare(dev); | |
1841 | return rc; | |
1842 | } | |
1843 | ||
1844 | static void iucv_pm_complete(struct device *dev) | |
1845 | { | |
1846 | #ifdef CONFIG_PM_DEBUG | |
1847 | printk(KERN_INFO "iucv_pm_complete\n"); | |
1848 | #endif | |
1849 | if (dev->driver && dev->driver->pm && dev->driver->pm->complete) | |
1850 | dev->driver->pm->complete(dev); | |
1851 | } | |
1852 | ||
1853 | /** | |
1854 | * iucv_path_table_empty() - determine if iucv path table is empty | |
1855 | * | |
1856 | * Returns 0 if there are still iucv pathes defined | |
1857 | * 1 if there are no iucv pathes defined | |
1858 | */ | |
1859 | int iucv_path_table_empty(void) | |
1860 | { | |
1861 | int i; | |
1862 | ||
1863 | for (i = 0; i < iucv_max_pathid; i++) { | |
1864 | if (iucv_path_table[i]) | |
1865 | return 0; | |
1866 | } | |
1867 | return 1; | |
1868 | } | |
1869 | ||
1870 | /** | |
1871 | * iucv_pm_freeze() - Freeze PM callback | |
1872 | * @dev: iucv-based device | |
1873 | * | |
1874 | * disable iucv interrupts | |
1875 | * invoke callback function of the iucv-based driver | |
1876 | * shut down iucv, if no iucv-pathes are established anymore | |
1877 | */ | |
1878 | static int iucv_pm_freeze(struct device *dev) | |
1879 | { | |
1880 | int cpu; | |
b7c2aecc | 1881 | struct iucv_irq_list *p, *n; |
672e405b UB |
1882 | int rc = 0; |
1883 | ||
1884 | #ifdef CONFIG_PM_DEBUG | |
1885 | printk(KERN_WARNING "iucv_pm_freeze\n"); | |
1886 | #endif | |
b7c2aecc UB |
1887 | if (iucv_pm_state != IUCV_PM_FREEZING) { |
1888 | for_each_cpu_mask_nr(cpu, iucv_irq_cpumask) | |
1889 | smp_call_function_single(cpu, iucv_block_cpu_almost, | |
1890 | NULL, 1); | |
1891 | cancel_work_sync(&iucv_work); | |
1892 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) { | |
1893 | list_del_init(&p->list); | |
1894 | iucv_sever_pathid(p->data.ippathid, | |
1895 | iucv_error_no_listener); | |
1896 | kfree(p); | |
1897 | } | |
1898 | } | |
4c89d86b | 1899 | iucv_pm_state = IUCV_PM_FREEZING; |
672e405b UB |
1900 | if (dev->driver && dev->driver->pm && dev->driver->pm->freeze) |
1901 | rc = dev->driver->pm->freeze(dev); | |
1902 | if (iucv_path_table_empty()) | |
1903 | iucv_disable(); | |
1904 | return rc; | |
1905 | } | |
1906 | ||
1907 | /** | |
1908 | * iucv_pm_thaw() - Thaw PM callback | |
1909 | * @dev: iucv-based device | |
1910 | * | |
1911 | * make iucv ready for use again: allocate path table, declare interrupt buffers | |
1912 | * and enable iucv interrupts | |
1913 | * invoke callback function of the iucv-based driver | |
1914 | */ | |
1915 | static int iucv_pm_thaw(struct device *dev) | |
1916 | { | |
1917 | int rc = 0; | |
1918 | ||
1919 | #ifdef CONFIG_PM_DEBUG | |
1920 | printk(KERN_WARNING "iucv_pm_thaw\n"); | |
1921 | #endif | |
4c89d86b | 1922 | iucv_pm_state = IUCV_PM_THAWING; |
672e405b UB |
1923 | if (!iucv_path_table) { |
1924 | rc = iucv_enable(); | |
1925 | if (rc) | |
1926 | goto out; | |
1927 | } | |
1928 | if (cpus_empty(iucv_irq_cpumask)) { | |
1929 | if (iucv_nonsmp_handler) | |
1930 | /* enable interrupts on one cpu */ | |
1931 | iucv_allow_cpu(NULL); | |
1932 | else | |
1933 | /* enable interrupts on all cpus */ | |
1934 | iucv_setmask_mp(); | |
1935 | } | |
1936 | if (dev->driver && dev->driver->pm && dev->driver->pm->thaw) | |
1937 | rc = dev->driver->pm->thaw(dev); | |
1938 | out: | |
1939 | return rc; | |
1940 | } | |
1941 | ||
1942 | /** | |
1943 | * iucv_pm_restore() - Restore PM callback | |
1944 | * @dev: iucv-based device | |
1945 | * | |
1946 | * make iucv ready for use again: allocate path table, declare interrupt buffers | |
1947 | * and enable iucv interrupts | |
1948 | * invoke callback function of the iucv-based driver | |
1949 | */ | |
1950 | static int iucv_pm_restore(struct device *dev) | |
1951 | { | |
1952 | int rc = 0; | |
1953 | ||
1954 | #ifdef CONFIG_PM_DEBUG | |
1955 | printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table); | |
1956 | #endif | |
4c89d86b UB |
1957 | if ((iucv_pm_state != IUCV_PM_RESTORING) && iucv_path_table) |
1958 | pr_warning("Suspending Linux did not completely close all IUCV " | |
1959 | "connections\n"); | |
1960 | iucv_pm_state = IUCV_PM_RESTORING; | |
672e405b UB |
1961 | if (cpus_empty(iucv_irq_cpumask)) { |
1962 | rc = iucv_query_maxconn(); | |
1963 | rc = iucv_enable(); | |
1964 | if (rc) | |
1965 | goto out; | |
1966 | } | |
1967 | if (dev->driver && dev->driver->pm && dev->driver->pm->restore) | |
1968 | rc = dev->driver->pm->restore(dev); | |
1969 | out: | |
1970 | return rc; | |
1971 | } | |
1972 | ||
2356f4cb MS |
1973 | /** |
1974 | * iucv_init | |
1975 | * | |
1976 | * Allocates and initializes various data structures. | |
1977 | */ | |
da99f056 | 1978 | static int __init iucv_init(void) |
2356f4cb MS |
1979 | { |
1980 | int rc; | |
70cf5035 | 1981 | int cpu; |
2356f4cb MS |
1982 | |
1983 | if (!MACHINE_IS_VM) { | |
1984 | rc = -EPROTONOSUPPORT; | |
1985 | goto out; | |
1986 | } | |
1987 | rc = iucv_query_maxconn(); | |
1988 | if (rc) | |
1989 | goto out; | |
da99f056 | 1990 | rc = register_external_interrupt(0x4000, iucv_external_interrupt); |
2356f4cb MS |
1991 | if (rc) |
1992 | goto out; | |
035da16f | 1993 | iucv_root = root_device_register("iucv"); |
2356f4cb MS |
1994 | if (IS_ERR(iucv_root)) { |
1995 | rc = PTR_ERR(iucv_root); | |
2d7bf367 | 1996 | goto out_int; |
2356f4cb | 1997 | } |
70cf5035 CL |
1998 | |
1999 | for_each_online_cpu(cpu) { | |
2000 | /* Note: GFP_DMA used to get memory below 2G */ | |
2001 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), | |
2002 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2003 | if (!iucv_irq_data[cpu]) { | |
2004 | rc = -ENOMEM; | |
2005 | goto out_free; | |
2006 | } | |
2007 | ||
2008 | /* Allocate parameter blocks. */ | |
2009 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), | |
2010 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2011 | if (!iucv_param[cpu]) { | |
2012 | rc = -ENOMEM; | |
2013 | goto out_free; | |
2014 | } | |
42e1b4c2 UB |
2015 | iucv_param_irq[cpu] = kmalloc_node(sizeof(union iucv_param), |
2016 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2017 | if (!iucv_param_irq[cpu]) { | |
2018 | rc = -ENOMEM; | |
2019 | goto out_free; | |
2020 | } | |
2021 | ||
2356f4cb | 2022 | } |
2d7bf367 CH |
2023 | rc = register_hotcpu_notifier(&iucv_cpu_notifier); |
2024 | if (rc) | |
2025 | goto out_free; | |
6c005961 UB |
2026 | rc = register_reboot_notifier(&iucv_reboot_notifier); |
2027 | if (rc) | |
2028 | goto out_cpu; | |
2356f4cb MS |
2029 | ASCEBC(iucv_error_no_listener, 16); |
2030 | ASCEBC(iucv_error_no_memory, 16); | |
2031 | ASCEBC(iucv_error_pathid, 16); | |
2032 | iucv_available = 1; | |
2d7bf367 CH |
2033 | rc = bus_register(&iucv_bus); |
2034 | if (rc) | |
6c005961 | 2035 | goto out_reboot; |
2356f4cb MS |
2036 | return 0; |
2037 | ||
6c005961 UB |
2038 | out_reboot: |
2039 | unregister_reboot_notifier(&iucv_reboot_notifier); | |
2d7bf367 CH |
2040 | out_cpu: |
2041 | unregister_hotcpu_notifier(&iucv_cpu_notifier); | |
70cf5035 CL |
2042 | out_free: |
2043 | for_each_possible_cpu(cpu) { | |
42e1b4c2 UB |
2044 | kfree(iucv_param_irq[cpu]); |
2045 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
2046 | kfree(iucv_param[cpu]); |
2047 | iucv_param[cpu] = NULL; | |
2048 | kfree(iucv_irq_data[cpu]); | |
2049 | iucv_irq_data[cpu] = NULL; | |
2050 | } | |
035da16f | 2051 | root_device_unregister(iucv_root); |
2356f4cb MS |
2052 | out_int: |
2053 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
2054 | out: | |
2055 | return rc; | |
2056 | } | |
2057 | ||
2058 | /** | |
2059 | * iucv_exit | |
2060 | * | |
2061 | * Frees everything allocated from iucv_init. | |
2062 | */ | |
da99f056 | 2063 | static void __exit iucv_exit(void) |
2356f4cb | 2064 | { |
04b090d5 | 2065 | struct iucv_irq_list *p, *n; |
70cf5035 | 2066 | int cpu; |
2356f4cb | 2067 | |
04b090d5 MS |
2068 | spin_lock_irq(&iucv_queue_lock); |
2069 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) | |
2070 | kfree(p); | |
2356f4cb MS |
2071 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) |
2072 | kfree(p); | |
04b090d5 | 2073 | spin_unlock_irq(&iucv_queue_lock); |
6c005961 | 2074 | unregister_reboot_notifier(&iucv_reboot_notifier); |
2356f4cb | 2075 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
70cf5035 | 2076 | for_each_possible_cpu(cpu) { |
42e1b4c2 UB |
2077 | kfree(iucv_param_irq[cpu]); |
2078 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
2079 | kfree(iucv_param[cpu]); |
2080 | iucv_param[cpu] = NULL; | |
2081 | kfree(iucv_irq_data[cpu]); | |
2082 | iucv_irq_data[cpu] = NULL; | |
2083 | } | |
035da16f | 2084 | root_device_unregister(iucv_root); |
2356f4cb MS |
2085 | bus_unregister(&iucv_bus); |
2086 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
2087 | } | |
2088 | ||
2089 | subsys_initcall(iucv_init); | |
2090 | module_exit(iucv_exit); | |
2091 | ||
2356f4cb MS |
2092 | MODULE_AUTHOR("(C) 2001 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); |
2093 | MODULE_DESCRIPTION("Linux for S/390 IUCV lowlevel driver"); | |
2094 | MODULE_LICENSE("GPL"); |