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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 | ||
052ff461 | 39 | #include <linux/kernel_stat.h> |
2356f4cb MS |
40 | #include <linux/module.h> |
41 | #include <linux/moduleparam.h> | |
2356f4cb MS |
42 | #include <linux/spinlock.h> |
43 | #include <linux/kernel.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/errno.h> | |
49 | #include <linux/err.h> | |
50 | #include <linux/device.h> | |
51 | #include <linux/cpu.h> | |
6c005961 | 52 | #include <linux/reboot.h> |
2356f4cb MS |
53 | #include <net/iucv/iucv.h> |
54 | #include <asm/atomic.h> | |
55 | #include <asm/ebcdic.h> | |
56 | #include <asm/io.h> | |
57 | #include <asm/s390_ext.h> | |
2356f4cb MS |
58 | #include <asm/smp.h> |
59 | ||
60 | /* | |
61 | * FLAGS: | |
62 | * All flags are defined in the field IPFLAGS1 of each function | |
63 | * and can be found in CP Programming Services. | |
64 | * IPSRCCLS - Indicates you have specified a source class. | |
65 | * IPTRGCLS - Indicates you have specified a target class. | |
66 | * IPFGPID - Indicates you have specified a pathid. | |
67 | * IPFGMID - Indicates you have specified a message ID. | |
68 | * IPNORPY - Indicates a one-way message. No reply expected. | |
69 | * IPALL - Indicates that all paths are affected. | |
70 | */ | |
71 | #define IUCV_IPSRCCLS 0x01 | |
72 | #define IUCV_IPTRGCLS 0x01 | |
73 | #define IUCV_IPFGPID 0x02 | |
74 | #define IUCV_IPFGMID 0x04 | |
75 | #define IUCV_IPNORPY 0x10 | |
76 | #define IUCV_IPALL 0x80 | |
77 | ||
da99f056 | 78 | static int iucv_bus_match(struct device *dev, struct device_driver *drv) |
2356f4cb MS |
79 | { |
80 | return 0; | |
81 | } | |
82 | ||
4c89d86b UB |
83 | enum iucv_pm_states { |
84 | IUCV_PM_INITIAL = 0, | |
85 | IUCV_PM_FREEZING = 1, | |
86 | IUCV_PM_THAWING = 2, | |
87 | IUCV_PM_RESTORING = 3, | |
88 | }; | |
89 | static enum iucv_pm_states iucv_pm_state; | |
90 | ||
672e405b UB |
91 | static int iucv_pm_prepare(struct device *); |
92 | static void iucv_pm_complete(struct device *); | |
93 | static int iucv_pm_freeze(struct device *); | |
94 | static int iucv_pm_thaw(struct device *); | |
95 | static int iucv_pm_restore(struct device *); | |
96 | ||
47145210 | 97 | static const struct dev_pm_ops iucv_pm_ops = { |
672e405b UB |
98 | .prepare = iucv_pm_prepare, |
99 | .complete = iucv_pm_complete, | |
100 | .freeze = iucv_pm_freeze, | |
101 | .thaw = iucv_pm_thaw, | |
102 | .restore = iucv_pm_restore, | |
103 | }; | |
104 | ||
2356f4cb MS |
105 | struct bus_type iucv_bus = { |
106 | .name = "iucv", | |
107 | .match = iucv_bus_match, | |
672e405b | 108 | .pm = &iucv_pm_ops, |
2356f4cb | 109 | }; |
da99f056 | 110 | EXPORT_SYMBOL(iucv_bus); |
2356f4cb MS |
111 | |
112 | struct device *iucv_root; | |
da99f056 HC |
113 | EXPORT_SYMBOL(iucv_root); |
114 | ||
2356f4cb MS |
115 | static int iucv_available; |
116 | ||
117 | /* General IUCV interrupt structure */ | |
118 | struct iucv_irq_data { | |
119 | u16 ippathid; | |
120 | u8 ipflags1; | |
121 | u8 iptype; | |
122 | u32 res2[8]; | |
123 | }; | |
124 | ||
04b090d5 | 125 | struct iucv_irq_list { |
2356f4cb MS |
126 | struct list_head list; |
127 | struct iucv_irq_data data; | |
128 | }; | |
129 | ||
70cf5035 | 130 | static struct iucv_irq_data *iucv_irq_data[NR_CPUS]; |
2356f4cb MS |
131 | static cpumask_t iucv_buffer_cpumask = CPU_MASK_NONE; |
132 | static cpumask_t iucv_irq_cpumask = CPU_MASK_NONE; | |
133 | ||
04b090d5 MS |
134 | /* |
135 | * Queue of interrupt buffers lock for delivery via the tasklet | |
136 | * (fast but can't call smp_call_function). | |
137 | */ | |
138 | static LIST_HEAD(iucv_task_queue); | |
139 | ||
140 | /* | |
141 | * The tasklet for fast delivery of iucv interrupts. | |
142 | */ | |
143 | static void iucv_tasklet_fn(unsigned long); | |
144 | static DECLARE_TASKLET(iucv_tasklet, iucv_tasklet_fn,0); | |
145 | ||
146 | /* | |
147 | * Queue of interrupt buffers for delivery via a work queue | |
148 | * (slower but can call smp_call_function). | |
149 | */ | |
150 | static LIST_HEAD(iucv_work_queue); | |
151 | ||
152 | /* | |
153 | * The work element to deliver path pending interrupts. | |
154 | */ | |
155 | static void iucv_work_fn(struct work_struct *work); | |
156 | static DECLARE_WORK(iucv_work, iucv_work_fn); | |
157 | ||
158 | /* | |
159 | * Spinlock protecting task and work queue. | |
160 | */ | |
161 | static DEFINE_SPINLOCK(iucv_queue_lock); | |
2356f4cb MS |
162 | |
163 | enum iucv_command_codes { | |
164 | IUCV_QUERY = 0, | |
165 | IUCV_RETRIEVE_BUFFER = 2, | |
166 | IUCV_SEND = 4, | |
167 | IUCV_RECEIVE = 5, | |
168 | IUCV_REPLY = 6, | |
169 | IUCV_REJECT = 8, | |
170 | IUCV_PURGE = 9, | |
171 | IUCV_ACCEPT = 10, | |
172 | IUCV_CONNECT = 11, | |
173 | IUCV_DECLARE_BUFFER = 12, | |
174 | IUCV_QUIESCE = 13, | |
175 | IUCV_RESUME = 14, | |
176 | IUCV_SEVER = 15, | |
177 | IUCV_SETMASK = 16, | |
672e405b | 178 | IUCV_SETCONTROLMASK = 17, |
2356f4cb MS |
179 | }; |
180 | ||
181 | /* | |
182 | * Error messages that are used with the iucv_sever function. They get | |
183 | * converted to EBCDIC. | |
184 | */ | |
185 | static char iucv_error_no_listener[16] = "NO LISTENER"; | |
186 | static char iucv_error_no_memory[16] = "NO MEMORY"; | |
187 | static char iucv_error_pathid[16] = "INVALID PATHID"; | |
188 | ||
189 | /* | |
190 | * iucv_handler_list: List of registered handlers. | |
191 | */ | |
192 | static LIST_HEAD(iucv_handler_list); | |
193 | ||
194 | /* | |
195 | * iucv_path_table: an array of iucv_path structures. | |
196 | */ | |
197 | static struct iucv_path **iucv_path_table; | |
198 | static unsigned long iucv_max_pathid; | |
199 | ||
200 | /* | |
201 | * iucv_lock: spinlock protecting iucv_handler_list and iucv_pathid_table | |
202 | */ | |
203 | static DEFINE_SPINLOCK(iucv_table_lock); | |
204 | ||
205 | /* | |
04b090d5 MS |
206 | * iucv_active_cpu: contains the number of the cpu executing the tasklet |
207 | * or the work handler. Needed for iucv_path_sever called from tasklet. | |
2356f4cb | 208 | */ |
04b090d5 | 209 | static int iucv_active_cpu = -1; |
2356f4cb MS |
210 | |
211 | /* | |
212 | * Mutex and wait queue for iucv_register/iucv_unregister. | |
213 | */ | |
214 | static DEFINE_MUTEX(iucv_register_mutex); | |
215 | ||
216 | /* | |
217 | * Counter for number of non-smp capable handlers. | |
218 | */ | |
219 | static int iucv_nonsmp_handler; | |
220 | ||
221 | /* | |
222 | * IUCV control data structure. Used by iucv_path_accept, iucv_path_connect, | |
223 | * iucv_path_quiesce and iucv_path_sever. | |
224 | */ | |
225 | struct iucv_cmd_control { | |
226 | u16 ippathid; | |
227 | u8 ipflags1; | |
228 | u8 iprcode; | |
229 | u16 ipmsglim; | |
230 | u16 res1; | |
231 | u8 ipvmid[8]; | |
232 | u8 ipuser[16]; | |
233 | u8 iptarget[8]; | |
234 | } __attribute__ ((packed,aligned(8))); | |
235 | ||
236 | /* | |
237 | * Data in parameter list iucv structure. Used by iucv_message_send, | |
238 | * iucv_message_send2way and iucv_message_reply. | |
239 | */ | |
240 | struct iucv_cmd_dpl { | |
241 | u16 ippathid; | |
242 | u8 ipflags1; | |
243 | u8 iprcode; | |
244 | u32 ipmsgid; | |
245 | u32 iptrgcls; | |
246 | u8 iprmmsg[8]; | |
247 | u32 ipsrccls; | |
248 | u32 ipmsgtag; | |
249 | u32 ipbfadr2; | |
250 | u32 ipbfln2f; | |
251 | u32 res; | |
252 | } __attribute__ ((packed,aligned(8))); | |
253 | ||
254 | /* | |
255 | * Data in buffer iucv structure. Used by iucv_message_receive, | |
256 | * iucv_message_reject, iucv_message_send, iucv_message_send2way | |
257 | * and iucv_declare_cpu. | |
258 | */ | |
259 | struct iucv_cmd_db { | |
260 | u16 ippathid; | |
261 | u8 ipflags1; | |
262 | u8 iprcode; | |
263 | u32 ipmsgid; | |
264 | u32 iptrgcls; | |
265 | u32 ipbfadr1; | |
266 | u32 ipbfln1f; | |
267 | u32 ipsrccls; | |
268 | u32 ipmsgtag; | |
269 | u32 ipbfadr2; | |
270 | u32 ipbfln2f; | |
271 | u32 res; | |
272 | } __attribute__ ((packed,aligned(8))); | |
273 | ||
274 | /* | |
275 | * Purge message iucv structure. Used by iucv_message_purge. | |
276 | */ | |
277 | struct iucv_cmd_purge { | |
278 | u16 ippathid; | |
279 | u8 ipflags1; | |
280 | u8 iprcode; | |
281 | u32 ipmsgid; | |
282 | u8 ipaudit[3]; | |
283 | u8 res1[5]; | |
284 | u32 res2; | |
285 | u32 ipsrccls; | |
286 | u32 ipmsgtag; | |
287 | u32 res3[3]; | |
288 | } __attribute__ ((packed,aligned(8))); | |
289 | ||
290 | /* | |
291 | * Set mask iucv structure. Used by iucv_enable_cpu. | |
292 | */ | |
293 | struct iucv_cmd_set_mask { | |
294 | u8 ipmask; | |
295 | u8 res1[2]; | |
296 | u8 iprcode; | |
297 | u32 res2[9]; | |
298 | } __attribute__ ((packed,aligned(8))); | |
299 | ||
300 | union iucv_param { | |
301 | struct iucv_cmd_control ctrl; | |
302 | struct iucv_cmd_dpl dpl; | |
303 | struct iucv_cmd_db db; | |
304 | struct iucv_cmd_purge purge; | |
305 | struct iucv_cmd_set_mask set_mask; | |
306 | }; | |
307 | ||
308 | /* | |
309 | * Anchor for per-cpu IUCV command parameter block. | |
310 | */ | |
70cf5035 | 311 | static union iucv_param *iucv_param[NR_CPUS]; |
42e1b4c2 | 312 | static union iucv_param *iucv_param_irq[NR_CPUS]; |
2356f4cb MS |
313 | |
314 | /** | |
315 | * iucv_call_b2f0 | |
316 | * @code: identifier of IUCV call to CP. | |
317 | * @parm: pointer to a struct iucv_parm block | |
318 | * | |
319 | * Calls CP to execute IUCV commands. | |
320 | * | |
321 | * Returns the result of the CP IUCV call. | |
322 | */ | |
323 | static inline int iucv_call_b2f0(int command, union iucv_param *parm) | |
324 | { | |
325 | register unsigned long reg0 asm ("0"); | |
326 | register unsigned long reg1 asm ("1"); | |
327 | int ccode; | |
328 | ||
329 | reg0 = command; | |
330 | reg1 = virt_to_phys(parm); | |
331 | asm volatile( | |
332 | " .long 0xb2f01000\n" | |
333 | " ipm %0\n" | |
334 | " srl %0,28\n" | |
335 | : "=d" (ccode), "=m" (*parm), "+d" (reg0), "+a" (reg1) | |
336 | : "m" (*parm) : "cc"); | |
337 | return (ccode == 1) ? parm->ctrl.iprcode : ccode; | |
338 | } | |
339 | ||
340 | /** | |
341 | * iucv_query_maxconn | |
342 | * | |
343 | * Determines the maximum number of connections that may be established. | |
344 | * | |
345 | * Returns the maximum number of connections or -EPERM is IUCV is not | |
346 | * available. | |
347 | */ | |
348 | static int iucv_query_maxconn(void) | |
349 | { | |
350 | register unsigned long reg0 asm ("0"); | |
351 | register unsigned long reg1 asm ("1"); | |
352 | void *param; | |
353 | int ccode; | |
354 | ||
355 | param = kzalloc(sizeof(union iucv_param), GFP_KERNEL|GFP_DMA); | |
356 | if (!param) | |
357 | return -ENOMEM; | |
358 | reg0 = IUCV_QUERY; | |
359 | reg1 = (unsigned long) param; | |
360 | asm volatile ( | |
361 | " .long 0xb2f01000\n" | |
362 | " ipm %0\n" | |
363 | " srl %0,28\n" | |
364 | : "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc"); | |
365 | if (ccode == 0) | |
b29e4da4 | 366 | iucv_max_pathid = reg1; |
2356f4cb MS |
367 | kfree(param); |
368 | return ccode ? -EPERM : 0; | |
369 | } | |
370 | ||
371 | /** | |
372 | * iucv_allow_cpu | |
373 | * @data: unused | |
374 | * | |
375 | * Allow iucv interrupts on this cpu. | |
376 | */ | |
377 | static void iucv_allow_cpu(void *data) | |
378 | { | |
379 | int cpu = smp_processor_id(); | |
380 | union iucv_param *parm; | |
381 | ||
382 | /* | |
383 | * Enable all iucv interrupts. | |
384 | * ipmask contains bits for the different interrupts | |
385 | * 0x80 - Flag to allow nonpriority message pending interrupts | |
386 | * 0x40 - Flag to allow priority message pending interrupts | |
387 | * 0x20 - Flag to allow nonpriority message completion interrupts | |
388 | * 0x10 - Flag to allow priority message completion interrupts | |
389 | * 0x08 - Flag to allow IUCV control interrupts | |
390 | */ | |
42e1b4c2 | 391 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
392 | memset(parm, 0, sizeof(union iucv_param)); |
393 | parm->set_mask.ipmask = 0xf8; | |
394 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
395 | ||
672e405b UB |
396 | /* |
397 | * Enable all iucv control interrupts. | |
398 | * ipmask contains bits for the different interrupts | |
399 | * 0x80 - Flag to allow pending connections interrupts | |
400 | * 0x40 - Flag to allow connection complete interrupts | |
401 | * 0x20 - Flag to allow connection severed interrupts | |
402 | * 0x10 - Flag to allow connection quiesced interrupts | |
403 | * 0x08 - Flag to allow connection resumed interrupts | |
404 | */ | |
405 | memset(parm, 0, sizeof(union iucv_param)); | |
406 | parm->set_mask.ipmask = 0xf8; | |
407 | iucv_call_b2f0(IUCV_SETCONTROLMASK, parm); | |
2356f4cb MS |
408 | /* Set indication that iucv interrupts are allowed for this cpu. */ |
409 | cpu_set(cpu, iucv_irq_cpumask); | |
410 | } | |
411 | ||
412 | /** | |
413 | * iucv_block_cpu | |
414 | * @data: unused | |
415 | * | |
416 | * Block iucv interrupts on this cpu. | |
417 | */ | |
418 | static void iucv_block_cpu(void *data) | |
419 | { | |
420 | int cpu = smp_processor_id(); | |
421 | union iucv_param *parm; | |
422 | ||
423 | /* Disable all iucv interrupts. */ | |
42e1b4c2 | 424 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
425 | memset(parm, 0, sizeof(union iucv_param)); |
426 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
427 | ||
428 | /* Clear indication that iucv interrupts are allowed for this cpu. */ | |
429 | cpu_clear(cpu, iucv_irq_cpumask); | |
430 | } | |
431 | ||
672e405b UB |
432 | /** |
433 | * iucv_block_cpu_almost | |
434 | * @data: unused | |
435 | * | |
436 | * Allow connection-severed interrupts only on this cpu. | |
437 | */ | |
438 | static void iucv_block_cpu_almost(void *data) | |
439 | { | |
440 | int cpu = smp_processor_id(); | |
441 | union iucv_param *parm; | |
442 | ||
443 | /* Allow iucv control interrupts only */ | |
444 | parm = iucv_param_irq[cpu]; | |
445 | memset(parm, 0, sizeof(union iucv_param)); | |
446 | parm->set_mask.ipmask = 0x08; | |
447 | iucv_call_b2f0(IUCV_SETMASK, parm); | |
448 | /* Allow iucv-severed interrupt only */ | |
449 | memset(parm, 0, sizeof(union iucv_param)); | |
450 | parm->set_mask.ipmask = 0x20; | |
451 | iucv_call_b2f0(IUCV_SETCONTROLMASK, parm); | |
452 | ||
453 | /* Clear indication that iucv interrupts are allowed for this cpu. */ | |
454 | cpu_clear(cpu, iucv_irq_cpumask); | |
455 | } | |
456 | ||
2356f4cb MS |
457 | /** |
458 | * iucv_declare_cpu | |
459 | * @data: unused | |
460 | * | |
3a4fa0a2 | 461 | * Declare a interrupt buffer on this cpu. |
2356f4cb MS |
462 | */ |
463 | static void iucv_declare_cpu(void *data) | |
464 | { | |
465 | int cpu = smp_processor_id(); | |
466 | union iucv_param *parm; | |
467 | int rc; | |
468 | ||
469 | if (cpu_isset(cpu, iucv_buffer_cpumask)) | |
470 | return; | |
471 | ||
472 | /* Declare interrupt buffer. */ | |
42e1b4c2 | 473 | parm = iucv_param_irq[cpu]; |
2356f4cb | 474 | memset(parm, 0, sizeof(union iucv_param)); |
70cf5035 | 475 | parm->db.ipbfadr1 = virt_to_phys(iucv_irq_data[cpu]); |
2356f4cb MS |
476 | rc = iucv_call_b2f0(IUCV_DECLARE_BUFFER, parm); |
477 | if (rc) { | |
478 | char *err = "Unknown"; | |
da99f056 | 479 | switch (rc) { |
2356f4cb MS |
480 | case 0x03: |
481 | err = "Directory error"; | |
482 | break; | |
483 | case 0x0a: | |
484 | err = "Invalid length"; | |
485 | break; | |
486 | case 0x13: | |
487 | err = "Buffer already exists"; | |
488 | break; | |
489 | case 0x3e: | |
490 | err = "Buffer overlap"; | |
491 | break; | |
492 | case 0x5c: | |
493 | err = "Paging or storage error"; | |
494 | break; | |
495 | } | |
8f7c502c UB |
496 | pr_warning("Defining an interrupt buffer on CPU %i" |
497 | " failed with 0x%02x (%s)\n", cpu, rc, err); | |
2356f4cb MS |
498 | return; |
499 | } | |
500 | ||
501 | /* Set indication that an iucv buffer exists for this cpu. */ | |
502 | cpu_set(cpu, iucv_buffer_cpumask); | |
503 | ||
504 | if (iucv_nonsmp_handler == 0 || cpus_empty(iucv_irq_cpumask)) | |
505 | /* Enable iucv interrupts on this cpu. */ | |
506 | iucv_allow_cpu(NULL); | |
507 | else | |
508 | /* Disable iucv interrupts on this cpu. */ | |
509 | iucv_block_cpu(NULL); | |
510 | } | |
511 | ||
512 | /** | |
513 | * iucv_retrieve_cpu | |
514 | * @data: unused | |
515 | * | |
516 | * Retrieve interrupt buffer on this cpu. | |
517 | */ | |
518 | static void iucv_retrieve_cpu(void *data) | |
519 | { | |
520 | int cpu = smp_processor_id(); | |
521 | union iucv_param *parm; | |
522 | ||
523 | if (!cpu_isset(cpu, iucv_buffer_cpumask)) | |
524 | return; | |
525 | ||
526 | /* Block iucv interrupts. */ | |
527 | iucv_block_cpu(NULL); | |
528 | ||
529 | /* Retrieve interrupt buffer. */ | |
42e1b4c2 | 530 | parm = iucv_param_irq[cpu]; |
2356f4cb MS |
531 | iucv_call_b2f0(IUCV_RETRIEVE_BUFFER, parm); |
532 | ||
533 | /* Clear indication that an iucv buffer exists for this cpu. */ | |
534 | cpu_clear(cpu, iucv_buffer_cpumask); | |
535 | } | |
536 | ||
537 | /** | |
538 | * iucv_setmask_smp | |
539 | * | |
540 | * Allow iucv interrupts on all cpus. | |
541 | */ | |
542 | static void iucv_setmask_mp(void) | |
543 | { | |
544 | int cpu; | |
545 | ||
7b9d1b22 | 546 | get_online_cpus(); |
2356f4cb MS |
547 | for_each_online_cpu(cpu) |
548 | /* Enable all cpus with a declared buffer. */ | |
549 | if (cpu_isset(cpu, iucv_buffer_cpumask) && | |
550 | !cpu_isset(cpu, iucv_irq_cpumask)) | |
3bb447fc | 551 | smp_call_function_single(cpu, iucv_allow_cpu, |
8691e5a8 | 552 | NULL, 1); |
7b9d1b22 | 553 | put_online_cpus(); |
2356f4cb MS |
554 | } |
555 | ||
556 | /** | |
557 | * iucv_setmask_up | |
558 | * | |
04b090d5 | 559 | * Allow iucv interrupts on a single cpu. |
2356f4cb MS |
560 | */ |
561 | static void iucv_setmask_up(void) | |
562 | { | |
563 | cpumask_t cpumask; | |
564 | int cpu; | |
565 | ||
566 | /* Disable all cpu but the first in cpu_irq_cpumask. */ | |
567 | cpumask = iucv_irq_cpumask; | |
568 | cpu_clear(first_cpu(iucv_irq_cpumask), cpumask); | |
0e12f848 | 569 | for_each_cpu_mask_nr(cpu, cpumask) |
8691e5a8 | 570 | smp_call_function_single(cpu, iucv_block_cpu, NULL, 1); |
2356f4cb MS |
571 | } |
572 | ||
573 | /** | |
574 | * iucv_enable | |
575 | * | |
576 | * This function makes iucv ready for use. It allocates the pathid | |
577 | * table, declares an iucv interrupt buffer and enables the iucv | |
578 | * interrupts. Called when the first user has registered an iucv | |
579 | * handler. | |
580 | */ | |
581 | static int iucv_enable(void) | |
582 | { | |
583 | size_t alloc_size; | |
584 | int cpu, rc; | |
585 | ||
f1d3e4dc | 586 | get_online_cpus(); |
2356f4cb MS |
587 | rc = -ENOMEM; |
588 | alloc_size = iucv_max_pathid * sizeof(struct iucv_path); | |
589 | iucv_path_table = kzalloc(alloc_size, GFP_KERNEL); | |
590 | if (!iucv_path_table) | |
591 | goto out; | |
592 | /* Declare per cpu buffers. */ | |
593 | rc = -EIO; | |
594 | for_each_online_cpu(cpu) | |
8691e5a8 | 595 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
2356f4cb MS |
596 | if (cpus_empty(iucv_buffer_cpumask)) |
597 | /* No cpu could declare an iucv buffer. */ | |
f1d3e4dc | 598 | goto out; |
7b9d1b22 | 599 | put_online_cpus(); |
2356f4cb | 600 | return 0; |
2356f4cb | 601 | out: |
f1d3e4dc HC |
602 | kfree(iucv_path_table); |
603 | iucv_path_table = NULL; | |
604 | put_online_cpus(); | |
2356f4cb MS |
605 | return rc; |
606 | } | |
607 | ||
608 | /** | |
609 | * iucv_disable | |
610 | * | |
611 | * This function shuts down iucv. It disables iucv interrupts, retrieves | |
612 | * the iucv interrupt buffer and frees the pathid table. Called after the | |
613 | * last user unregister its iucv handler. | |
614 | */ | |
615 | static void iucv_disable(void) | |
616 | { | |
8b122efd | 617 | get_online_cpus(); |
15c8b6c1 | 618 | on_each_cpu(iucv_retrieve_cpu, NULL, 1); |
2356f4cb | 619 | kfree(iucv_path_table); |
f1d3e4dc HC |
620 | iucv_path_table = NULL; |
621 | put_online_cpus(); | |
2356f4cb MS |
622 | } |
623 | ||
2356f4cb MS |
624 | static int __cpuinit iucv_cpu_notify(struct notifier_block *self, |
625 | unsigned long action, void *hcpu) | |
626 | { | |
627 | cpumask_t cpumask; | |
628 | long cpu = (long) hcpu; | |
629 | ||
630 | switch (action) { | |
631 | case CPU_UP_PREPARE: | |
8bb78442 | 632 | case CPU_UP_PREPARE_FROZEN: |
70cf5035 CL |
633 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), |
634 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
635 | if (!iucv_irq_data[cpu]) | |
92e99a98 AM |
636 | return notifier_from_errno(-ENOMEM); |
637 | ||
70cf5035 CL |
638 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), |
639 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
d0236f8f AM |
640 | if (!iucv_param[cpu]) { |
641 | kfree(iucv_irq_data[cpu]); | |
642 | iucv_irq_data[cpu] = NULL; | |
92e99a98 | 643 | return notifier_from_errno(-ENOMEM); |
d0236f8f | 644 | } |
42e1b4c2 UB |
645 | iucv_param_irq[cpu] = kmalloc_node(sizeof(union iucv_param), |
646 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
647 | if (!iucv_param_irq[cpu]) { | |
648 | kfree(iucv_param[cpu]); | |
649 | iucv_param[cpu] = NULL; | |
650 | kfree(iucv_irq_data[cpu]); | |
651 | iucv_irq_data[cpu] = NULL; | |
92e99a98 | 652 | return notifier_from_errno(-ENOMEM); |
42e1b4c2 | 653 | } |
2356f4cb MS |
654 | break; |
655 | case CPU_UP_CANCELED: | |
8bb78442 | 656 | case CPU_UP_CANCELED_FROZEN: |
2356f4cb | 657 | case CPU_DEAD: |
8bb78442 | 658 | case CPU_DEAD_FROZEN: |
42e1b4c2 UB |
659 | kfree(iucv_param_irq[cpu]); |
660 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
661 | kfree(iucv_param[cpu]); |
662 | iucv_param[cpu] = NULL; | |
663 | kfree(iucv_irq_data[cpu]); | |
664 | iucv_irq_data[cpu] = NULL; | |
2356f4cb MS |
665 | break; |
666 | case CPU_ONLINE: | |
8bb78442 | 667 | case CPU_ONLINE_FROZEN: |
2356f4cb | 668 | case CPU_DOWN_FAILED: |
8bb78442 | 669 | case CPU_DOWN_FAILED_FROZEN: |
f1d3e4dc HC |
670 | if (!iucv_path_table) |
671 | break; | |
8691e5a8 | 672 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
2356f4cb MS |
673 | break; |
674 | case CPU_DOWN_PREPARE: | |
8bb78442 | 675 | case CPU_DOWN_PREPARE_FROZEN: |
f1d3e4dc HC |
676 | if (!iucv_path_table) |
677 | break; | |
2356f4cb MS |
678 | cpumask = iucv_buffer_cpumask; |
679 | cpu_clear(cpu, cpumask); | |
680 | if (cpus_empty(cpumask)) | |
681 | /* Can't offline last IUCV enabled cpu. */ | |
92e99a98 | 682 | return notifier_from_errno(-EINVAL); |
8691e5a8 | 683 | smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 1); |
2356f4cb | 684 | if (cpus_empty(iucv_irq_cpumask)) |
3bb447fc | 685 | smp_call_function_single(first_cpu(iucv_buffer_cpumask), |
8691e5a8 | 686 | iucv_allow_cpu, NULL, 1); |
2356f4cb MS |
687 | break; |
688 | } | |
689 | return NOTIFY_OK; | |
690 | } | |
691 | ||
f1494ed1 | 692 | static struct notifier_block __refdata iucv_cpu_notifier = { |
2356f4cb MS |
693 | .notifier_call = iucv_cpu_notify, |
694 | }; | |
2356f4cb MS |
695 | |
696 | /** | |
697 | * iucv_sever_pathid | |
698 | * @pathid: path identification number. | |
699 | * @userdata: 16-bytes of user data. | |
700 | * | |
701 | * Sever an iucv path to free up the pathid. Used internally. | |
702 | */ | |
703 | static int iucv_sever_pathid(u16 pathid, u8 userdata[16]) | |
704 | { | |
705 | union iucv_param *parm; | |
706 | ||
42e1b4c2 | 707 | parm = iucv_param_irq[smp_processor_id()]; |
2356f4cb MS |
708 | memset(parm, 0, sizeof(union iucv_param)); |
709 | if (userdata) | |
710 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
711 | parm->ctrl.ippathid = pathid; | |
712 | return iucv_call_b2f0(IUCV_SEVER, parm); | |
713 | } | |
714 | ||
715 | /** | |
04b090d5 | 716 | * __iucv_cleanup_queue |
2356f4cb MS |
717 | * @dummy: unused dummy argument |
718 | * | |
719 | * Nop function called via smp_call_function to force work items from | |
720 | * pending external iucv interrupts to the work queue. | |
721 | */ | |
04b090d5 | 722 | static void __iucv_cleanup_queue(void *dummy) |
2356f4cb MS |
723 | { |
724 | } | |
725 | ||
726 | /** | |
04b090d5 | 727 | * iucv_cleanup_queue |
2356f4cb MS |
728 | * |
729 | * Function called after a path has been severed to find all remaining | |
730 | * work items for the now stale pathid. The caller needs to hold the | |
731 | * iucv_table_lock. | |
732 | */ | |
04b090d5 | 733 | static void iucv_cleanup_queue(void) |
2356f4cb | 734 | { |
04b090d5 | 735 | struct iucv_irq_list *p, *n; |
2356f4cb MS |
736 | |
737 | /* | |
04b090d5 MS |
738 | * When a path is severed, the pathid can be reused immediatly |
739 | * on a iucv connect or a connection pending interrupt. Remove | |
740 | * all entries from the task queue that refer to a stale pathid | |
741 | * (iucv_path_table[ix] == NULL). Only then do the iucv connect | |
742 | * or deliver the connection pending interrupt. To get all the | |
743 | * pending interrupts force them to the work queue by calling | |
744 | * an empty function on all cpus. | |
2356f4cb | 745 | */ |
8691e5a8 | 746 | smp_call_function(__iucv_cleanup_queue, NULL, 1); |
04b090d5 MS |
747 | spin_lock_irq(&iucv_queue_lock); |
748 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) { | |
749 | /* Remove stale work items from the task queue. */ | |
750 | if (iucv_path_table[p->data.ippathid] == NULL) { | |
2356f4cb MS |
751 | list_del(&p->list); |
752 | kfree(p); | |
753 | } | |
754 | } | |
04b090d5 | 755 | spin_unlock_irq(&iucv_queue_lock); |
2356f4cb MS |
756 | } |
757 | ||
758 | /** | |
759 | * iucv_register: | |
760 | * @handler: address of iucv handler structure | |
761 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
762 | * | |
763 | * Registers a driver with IUCV. | |
764 | * | |
765 | * Returns 0 on success, -ENOMEM if the memory allocation for the pathid | |
766 | * table failed, or -EIO if IUCV_DECLARE_BUFFER failed on all cpus. | |
767 | */ | |
768 | int iucv_register(struct iucv_handler *handler, int smp) | |
769 | { | |
770 | int rc; | |
771 | ||
772 | if (!iucv_available) | |
773 | return -ENOSYS; | |
774 | mutex_lock(&iucv_register_mutex); | |
775 | if (!smp) | |
776 | iucv_nonsmp_handler++; | |
777 | if (list_empty(&iucv_handler_list)) { | |
778 | rc = iucv_enable(); | |
779 | if (rc) | |
780 | goto out_mutex; | |
781 | } else if (!smp && iucv_nonsmp_handler == 1) | |
782 | iucv_setmask_up(); | |
783 | INIT_LIST_HEAD(&handler->paths); | |
784 | ||
435bc9df | 785 | spin_lock_bh(&iucv_table_lock); |
2356f4cb | 786 | list_add_tail(&handler->list, &iucv_handler_list); |
435bc9df | 787 | spin_unlock_bh(&iucv_table_lock); |
2356f4cb MS |
788 | rc = 0; |
789 | out_mutex: | |
790 | mutex_unlock(&iucv_register_mutex); | |
791 | return rc; | |
792 | } | |
da99f056 | 793 | EXPORT_SYMBOL(iucv_register); |
2356f4cb MS |
794 | |
795 | /** | |
796 | * iucv_unregister | |
797 | * @handler: address of iucv handler structure | |
798 | * @smp: != 0 indicates that the handler can deal with out of order messages | |
799 | * | |
800 | * Unregister driver from IUCV. | |
801 | */ | |
802 | void iucv_unregister(struct iucv_handler *handler, int smp) | |
803 | { | |
804 | struct iucv_path *p, *n; | |
805 | ||
806 | mutex_lock(&iucv_register_mutex); | |
807 | spin_lock_bh(&iucv_table_lock); | |
808 | /* Remove handler from the iucv_handler_list. */ | |
809 | list_del_init(&handler->list); | |
810 | /* Sever all pathids still refering to the handler. */ | |
811 | list_for_each_entry_safe(p, n, &handler->paths, list) { | |
812 | iucv_sever_pathid(p->pathid, NULL); | |
813 | iucv_path_table[p->pathid] = NULL; | |
814 | list_del(&p->list); | |
2356f4cb MS |
815 | iucv_path_free(p); |
816 | } | |
817 | spin_unlock_bh(&iucv_table_lock); | |
818 | if (!smp) | |
819 | iucv_nonsmp_handler--; | |
820 | if (list_empty(&iucv_handler_list)) | |
821 | iucv_disable(); | |
822 | else if (!smp && iucv_nonsmp_handler == 0) | |
823 | iucv_setmask_mp(); | |
824 | mutex_unlock(&iucv_register_mutex); | |
825 | } | |
da99f056 | 826 | EXPORT_SYMBOL(iucv_unregister); |
2356f4cb | 827 | |
6c005961 UB |
828 | static int iucv_reboot_event(struct notifier_block *this, |
829 | unsigned long event, void *ptr) | |
830 | { | |
831 | int i, rc; | |
832 | ||
833 | get_online_cpus(); | |
834 | on_each_cpu(iucv_block_cpu, NULL, 1); | |
835 | preempt_disable(); | |
836 | for (i = 0; i < iucv_max_pathid; i++) { | |
837 | if (iucv_path_table[i]) | |
838 | rc = iucv_sever_pathid(i, NULL); | |
839 | } | |
840 | preempt_enable(); | |
841 | put_online_cpus(); | |
842 | iucv_disable(); | |
843 | return NOTIFY_DONE; | |
844 | } | |
845 | ||
846 | static struct notifier_block iucv_reboot_notifier = { | |
847 | .notifier_call = iucv_reboot_event, | |
848 | }; | |
849 | ||
2356f4cb MS |
850 | /** |
851 | * iucv_path_accept | |
852 | * @path: address of iucv path structure | |
853 | * @handler: address of iucv handler structure | |
854 | * @userdata: 16 bytes of data reflected to the communication partner | |
855 | * @private: private data passed to interrupt handlers for this path | |
856 | * | |
857 | * This function is issued after the user received a connection pending | |
858 | * external interrupt and now wishes to complete the IUCV communication path. | |
859 | * | |
860 | * Returns the result of the CP IUCV call. | |
861 | */ | |
862 | int iucv_path_accept(struct iucv_path *path, struct iucv_handler *handler, | |
863 | u8 userdata[16], void *private) | |
864 | { | |
865 | union iucv_param *parm; | |
866 | int rc; | |
867 | ||
868 | local_bh_disable(); | |
d28ecab0 | 869 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
870 | rc = -EIO; |
871 | goto out; | |
872 | } | |
2356f4cb | 873 | /* Prepare parameter block. */ |
70cf5035 | 874 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
875 | memset(parm, 0, sizeof(union iucv_param)); |
876 | parm->ctrl.ippathid = path->pathid; | |
877 | parm->ctrl.ipmsglim = path->msglim; | |
878 | if (userdata) | |
879 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
880 | parm->ctrl.ipflags1 = path->flags; | |
881 | ||
882 | rc = iucv_call_b2f0(IUCV_ACCEPT, parm); | |
883 | if (!rc) { | |
884 | path->private = private; | |
885 | path->msglim = parm->ctrl.ipmsglim; | |
886 | path->flags = parm->ctrl.ipflags1; | |
887 | } | |
6c005961 | 888 | out: |
2356f4cb MS |
889 | local_bh_enable(); |
890 | return rc; | |
891 | } | |
da99f056 | 892 | EXPORT_SYMBOL(iucv_path_accept); |
2356f4cb MS |
893 | |
894 | /** | |
895 | * iucv_path_connect | |
896 | * @path: address of iucv path structure | |
897 | * @handler: address of iucv handler structure | |
898 | * @userid: 8-byte user identification | |
899 | * @system: 8-byte target system identification | |
900 | * @userdata: 16 bytes of data reflected to the communication partner | |
901 | * @private: private data passed to interrupt handlers for this path | |
902 | * | |
903 | * This function establishes an IUCV path. Although the connect may complete | |
904 | * successfully, you are not able to use the path until you receive an IUCV | |
905 | * Connection Complete external interrupt. | |
906 | * | |
907 | * Returns the result of the CP IUCV call. | |
908 | */ | |
909 | int iucv_path_connect(struct iucv_path *path, struct iucv_handler *handler, | |
910 | u8 userid[8], u8 system[8], u8 userdata[16], | |
911 | void *private) | |
912 | { | |
913 | union iucv_param *parm; | |
914 | int rc; | |
915 | ||
04b090d5 MS |
916 | spin_lock_bh(&iucv_table_lock); |
917 | iucv_cleanup_queue(); | |
d28ecab0 | 918 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
919 | rc = -EIO; |
920 | goto out; | |
921 | } | |
70cf5035 | 922 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
923 | memset(parm, 0, sizeof(union iucv_param)); |
924 | parm->ctrl.ipmsglim = path->msglim; | |
925 | parm->ctrl.ipflags1 = path->flags; | |
926 | if (userid) { | |
927 | memcpy(parm->ctrl.ipvmid, userid, sizeof(parm->ctrl.ipvmid)); | |
928 | ASCEBC(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
929 | EBC_TOUPPER(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); | |
930 | } | |
931 | if (system) { | |
932 | memcpy(parm->ctrl.iptarget, system, | |
933 | sizeof(parm->ctrl.iptarget)); | |
934 | ASCEBC(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
935 | EBC_TOUPPER(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); | |
936 | } | |
937 | if (userdata) | |
938 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
939 | ||
940 | rc = iucv_call_b2f0(IUCV_CONNECT, parm); | |
941 | if (!rc) { | |
942 | if (parm->ctrl.ippathid < iucv_max_pathid) { | |
943 | path->pathid = parm->ctrl.ippathid; | |
944 | path->msglim = parm->ctrl.ipmsglim; | |
945 | path->flags = parm->ctrl.ipflags1; | |
946 | path->handler = handler; | |
947 | path->private = private; | |
948 | list_add_tail(&path->list, &handler->paths); | |
949 | iucv_path_table[path->pathid] = path; | |
950 | } else { | |
951 | iucv_sever_pathid(parm->ctrl.ippathid, | |
952 | iucv_error_pathid); | |
953 | rc = -EIO; | |
954 | } | |
955 | } | |
6c005961 | 956 | out: |
04b090d5 | 957 | spin_unlock_bh(&iucv_table_lock); |
2356f4cb MS |
958 | return rc; |
959 | } | |
da99f056 | 960 | EXPORT_SYMBOL(iucv_path_connect); |
2356f4cb MS |
961 | |
962 | /** | |
963 | * iucv_path_quiesce: | |
964 | * @path: address of iucv path structure | |
965 | * @userdata: 16 bytes of data reflected to the communication partner | |
966 | * | |
967 | * This function temporarily suspends incoming messages on an IUCV path. | |
968 | * You can later reactivate the path by invoking the iucv_resume function. | |
969 | * | |
970 | * Returns the result from the CP IUCV call. | |
971 | */ | |
972 | int iucv_path_quiesce(struct iucv_path *path, u8 userdata[16]) | |
973 | { | |
974 | union iucv_param *parm; | |
975 | int rc; | |
976 | ||
977 | local_bh_disable(); | |
d28ecab0 | 978 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
979 | rc = -EIO; |
980 | goto out; | |
981 | } | |
70cf5035 | 982 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
983 | memset(parm, 0, sizeof(union iucv_param)); |
984 | if (userdata) | |
985 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
986 | parm->ctrl.ippathid = path->pathid; | |
987 | rc = iucv_call_b2f0(IUCV_QUIESCE, parm); | |
6c005961 | 988 | out: |
2356f4cb MS |
989 | local_bh_enable(); |
990 | return rc; | |
991 | } | |
da99f056 | 992 | EXPORT_SYMBOL(iucv_path_quiesce); |
2356f4cb MS |
993 | |
994 | /** | |
995 | * iucv_path_resume: | |
996 | * @path: address of iucv path structure | |
997 | * @userdata: 16 bytes of data reflected to the communication partner | |
998 | * | |
999 | * This function resumes incoming messages on an IUCV path that has | |
1000 | * been stopped with iucv_path_quiesce. | |
1001 | * | |
1002 | * Returns the result from the CP IUCV call. | |
1003 | */ | |
1004 | int iucv_path_resume(struct iucv_path *path, u8 userdata[16]) | |
1005 | { | |
1006 | union iucv_param *parm; | |
1007 | int rc; | |
1008 | ||
1009 | local_bh_disable(); | |
d28ecab0 | 1010 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1011 | rc = -EIO; |
1012 | goto out; | |
1013 | } | |
70cf5035 | 1014 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1015 | memset(parm, 0, sizeof(union iucv_param)); |
1016 | if (userdata) | |
1017 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); | |
1018 | parm->ctrl.ippathid = path->pathid; | |
1019 | rc = iucv_call_b2f0(IUCV_RESUME, parm); | |
6c005961 | 1020 | out: |
2356f4cb MS |
1021 | local_bh_enable(); |
1022 | return rc; | |
1023 | } | |
1024 | ||
1025 | /** | |
1026 | * iucv_path_sever | |
1027 | * @path: address of iucv path structure | |
1028 | * @userdata: 16 bytes of data reflected to the communication partner | |
1029 | * | |
1030 | * This function terminates an IUCV path. | |
1031 | * | |
1032 | * Returns the result from the CP IUCV call. | |
1033 | */ | |
1034 | int iucv_path_sever(struct iucv_path *path, u8 userdata[16]) | |
1035 | { | |
1036 | int rc; | |
1037 | ||
2356f4cb | 1038 | preempt_disable(); |
d28ecab0 | 1039 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1040 | rc = -EIO; |
1041 | goto out; | |
1042 | } | |
04b090d5 | 1043 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb MS |
1044 | spin_lock_bh(&iucv_table_lock); |
1045 | rc = iucv_sever_pathid(path->pathid, userdata); | |
42e1b4c2 UB |
1046 | iucv_path_table[path->pathid] = NULL; |
1047 | list_del_init(&path->list); | |
04b090d5 | 1048 | if (iucv_active_cpu != smp_processor_id()) |
2356f4cb | 1049 | spin_unlock_bh(&iucv_table_lock); |
6c005961 | 1050 | out: |
2356f4cb MS |
1051 | preempt_enable(); |
1052 | return rc; | |
1053 | } | |
da99f056 | 1054 | EXPORT_SYMBOL(iucv_path_sever); |
2356f4cb MS |
1055 | |
1056 | /** | |
1057 | * iucv_message_purge | |
1058 | * @path: address of iucv path structure | |
1059 | * @msg: address of iucv msg structure | |
1060 | * @srccls: source class of message | |
1061 | * | |
1062 | * Cancels a message you have sent. | |
1063 | * | |
1064 | * Returns the result from the CP IUCV call. | |
1065 | */ | |
1066 | int iucv_message_purge(struct iucv_path *path, struct iucv_message *msg, | |
1067 | u32 srccls) | |
1068 | { | |
1069 | union iucv_param *parm; | |
1070 | int rc; | |
1071 | ||
1072 | local_bh_disable(); | |
d28ecab0 | 1073 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1074 | rc = -EIO; |
1075 | goto out; | |
1076 | } | |
70cf5035 | 1077 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1078 | memset(parm, 0, sizeof(union iucv_param)); |
1079 | parm->purge.ippathid = path->pathid; | |
1080 | parm->purge.ipmsgid = msg->id; | |
1081 | parm->purge.ipsrccls = srccls; | |
1082 | parm->purge.ipflags1 = IUCV_IPSRCCLS | IUCV_IPFGMID | IUCV_IPFGPID; | |
1083 | rc = iucv_call_b2f0(IUCV_PURGE, parm); | |
1084 | if (!rc) { | |
1085 | msg->audit = (*(u32 *) &parm->purge.ipaudit) >> 8; | |
1086 | msg->tag = parm->purge.ipmsgtag; | |
1087 | } | |
6c005961 | 1088 | out: |
2356f4cb MS |
1089 | local_bh_enable(); |
1090 | return rc; | |
1091 | } | |
da99f056 | 1092 | EXPORT_SYMBOL(iucv_message_purge); |
2356f4cb MS |
1093 | |
1094 | /** | |
91d5d45e HB |
1095 | * iucv_message_receive_iprmdata |
1096 | * @path: address of iucv path structure | |
1097 | * @msg: address of iucv msg structure | |
1098 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1099 | * @buffer: address of data buffer or address of struct iucv_array | |
1100 | * @size: length of data buffer | |
1101 | * @residual: | |
1102 | * | |
1103 | * Internal function used by iucv_message_receive and __iucv_message_receive | |
1104 | * to receive RMDATA data stored in struct iucv_message. | |
1105 | */ | |
1106 | static int iucv_message_receive_iprmdata(struct iucv_path *path, | |
1107 | struct iucv_message *msg, | |
1108 | u8 flags, void *buffer, | |
1109 | size_t size, size_t *residual) | |
1110 | { | |
1111 | struct iucv_array *array; | |
1112 | u8 *rmmsg; | |
1113 | size_t copy; | |
1114 | ||
1115 | /* | |
1116 | * Message is 8 bytes long and has been stored to the | |
1117 | * message descriptor itself. | |
1118 | */ | |
1119 | if (residual) | |
1120 | *residual = abs(size - 8); | |
1121 | rmmsg = msg->rmmsg; | |
1122 | if (flags & IUCV_IPBUFLST) { | |
1123 | /* Copy to struct iucv_array. */ | |
1124 | size = (size < 8) ? size : 8; | |
1125 | for (array = buffer; size > 0; array++) { | |
1126 | copy = min_t(size_t, size, array->length); | |
1127 | memcpy((u8 *)(addr_t) array->address, | |
1128 | rmmsg, copy); | |
1129 | rmmsg += copy; | |
1130 | size -= copy; | |
1131 | } | |
1132 | } else { | |
1133 | /* Copy to direct buffer. */ | |
1134 | memcpy(buffer, rmmsg, min_t(size_t, size, 8)); | |
1135 | } | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | /** | |
1140 | * __iucv_message_receive | |
2356f4cb MS |
1141 | * @path: address of iucv path structure |
1142 | * @msg: address of iucv msg structure | |
1143 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1144 | * @buffer: address of data buffer or address of struct iucv_array | |
1145 | * @size: length of data buffer | |
1146 | * @residual: | |
1147 | * | |
1148 | * This function receives messages that are being sent to you over | |
1149 | * established paths. This function will deal with RMDATA messages | |
1150 | * embedded in struct iucv_message as well. | |
1151 | * | |
91d5d45e HB |
1152 | * Locking: no locking |
1153 | * | |
2356f4cb MS |
1154 | * Returns the result from the CP IUCV call. |
1155 | */ | |
91d5d45e HB |
1156 | int __iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, |
1157 | u8 flags, void *buffer, size_t size, size_t *residual) | |
2356f4cb MS |
1158 | { |
1159 | union iucv_param *parm; | |
2356f4cb MS |
1160 | int rc; |
1161 | ||
91d5d45e HB |
1162 | if (msg->flags & IUCV_IPRMDATA) |
1163 | return iucv_message_receive_iprmdata(path, msg, flags, | |
1164 | buffer, size, residual); | |
d28ecab0 | 1165 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1166 | rc = -EIO; |
1167 | goto out; | |
1168 | } | |
70cf5035 | 1169 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1170 | memset(parm, 0, sizeof(union iucv_param)); |
1171 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1172 | parm->db.ipbfln1f = (u32) size; | |
1173 | parm->db.ipmsgid = msg->id; | |
1174 | parm->db.ippathid = path->pathid; | |
1175 | parm->db.iptrgcls = msg->class; | |
1176 | parm->db.ipflags1 = (flags | IUCV_IPFGPID | | |
1177 | IUCV_IPFGMID | IUCV_IPTRGCLS); | |
1178 | rc = iucv_call_b2f0(IUCV_RECEIVE, parm); | |
1179 | if (!rc || rc == 5) { | |
1180 | msg->flags = parm->db.ipflags1; | |
1181 | if (residual) | |
1182 | *residual = parm->db.ipbfln1f; | |
1183 | } | |
6c005961 | 1184 | out: |
91d5d45e HB |
1185 | return rc; |
1186 | } | |
1187 | EXPORT_SYMBOL(__iucv_message_receive); | |
1188 | ||
1189 | /** | |
1190 | * iucv_message_receive | |
1191 | * @path: address of iucv path structure | |
1192 | * @msg: address of iucv msg structure | |
1193 | * @flags: how the message is received (IUCV_IPBUFLST) | |
1194 | * @buffer: address of data buffer or address of struct iucv_array | |
1195 | * @size: length of data buffer | |
1196 | * @residual: | |
1197 | * | |
1198 | * This function receives messages that are being sent to you over | |
1199 | * established paths. This function will deal with RMDATA messages | |
1200 | * embedded in struct iucv_message as well. | |
1201 | * | |
1202 | * Locking: local_bh_enable/local_bh_disable | |
1203 | * | |
1204 | * Returns the result from the CP IUCV call. | |
1205 | */ | |
1206 | int iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, | |
1207 | u8 flags, void *buffer, size_t size, size_t *residual) | |
1208 | { | |
1209 | int rc; | |
1210 | ||
1211 | if (msg->flags & IUCV_IPRMDATA) | |
1212 | return iucv_message_receive_iprmdata(path, msg, flags, | |
1213 | buffer, size, residual); | |
1214 | local_bh_disable(); | |
1215 | rc = __iucv_message_receive(path, msg, flags, buffer, size, residual); | |
2356f4cb MS |
1216 | local_bh_enable(); |
1217 | return rc; | |
1218 | } | |
da99f056 | 1219 | EXPORT_SYMBOL(iucv_message_receive); |
2356f4cb MS |
1220 | |
1221 | /** | |
1222 | * iucv_message_reject | |
1223 | * @path: address of iucv path structure | |
1224 | * @msg: address of iucv msg structure | |
1225 | * | |
1226 | * The reject function refuses a specified message. Between the time you | |
1227 | * are notified of a message and the time that you complete the message, | |
1228 | * the message may be rejected. | |
1229 | * | |
1230 | * Returns the result from the CP IUCV call. | |
1231 | */ | |
1232 | int iucv_message_reject(struct iucv_path *path, struct iucv_message *msg) | |
1233 | { | |
1234 | union iucv_param *parm; | |
1235 | int rc; | |
1236 | ||
1237 | local_bh_disable(); | |
d28ecab0 | 1238 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1239 | rc = -EIO; |
1240 | goto out; | |
1241 | } | |
70cf5035 | 1242 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1243 | memset(parm, 0, sizeof(union iucv_param)); |
1244 | parm->db.ippathid = path->pathid; | |
1245 | parm->db.ipmsgid = msg->id; | |
1246 | parm->db.iptrgcls = msg->class; | |
1247 | parm->db.ipflags1 = (IUCV_IPTRGCLS | IUCV_IPFGMID | IUCV_IPFGPID); | |
1248 | rc = iucv_call_b2f0(IUCV_REJECT, parm); | |
6c005961 | 1249 | out: |
2356f4cb MS |
1250 | local_bh_enable(); |
1251 | return rc; | |
1252 | } | |
da99f056 | 1253 | EXPORT_SYMBOL(iucv_message_reject); |
2356f4cb MS |
1254 | |
1255 | /** | |
1256 | * iucv_message_reply | |
1257 | * @path: address of iucv path structure | |
1258 | * @msg: address of iucv msg structure | |
1259 | * @flags: how the reply is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1260 | * @reply: address of reply data buffer or address of struct iucv_array | |
1261 | * @size: length of reply data buffer | |
1262 | * | |
1263 | * This function responds to the two-way messages that you receive. You | |
1264 | * must identify completely the message to which you wish to reply. ie, | |
1265 | * pathid, msgid, and trgcls. Prmmsg signifies the data is moved into | |
1266 | * the parameter list. | |
1267 | * | |
1268 | * Returns the result from the CP IUCV call. | |
1269 | */ | |
1270 | int iucv_message_reply(struct iucv_path *path, struct iucv_message *msg, | |
1271 | u8 flags, void *reply, size_t size) | |
1272 | { | |
1273 | union iucv_param *parm; | |
1274 | int rc; | |
1275 | ||
1276 | local_bh_disable(); | |
d28ecab0 | 1277 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1278 | rc = -EIO; |
1279 | goto out; | |
1280 | } | |
70cf5035 | 1281 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1282 | memset(parm, 0, sizeof(union iucv_param)); |
1283 | if (flags & IUCV_IPRMDATA) { | |
1284 | parm->dpl.ippathid = path->pathid; | |
1285 | parm->dpl.ipflags1 = flags; | |
1286 | parm->dpl.ipmsgid = msg->id; | |
1287 | parm->dpl.iptrgcls = msg->class; | |
1288 | memcpy(parm->dpl.iprmmsg, reply, min_t(size_t, size, 8)); | |
1289 | } else { | |
1290 | parm->db.ipbfadr1 = (u32)(addr_t) reply; | |
1291 | parm->db.ipbfln1f = (u32) size; | |
1292 | parm->db.ippathid = path->pathid; | |
1293 | parm->db.ipflags1 = flags; | |
1294 | parm->db.ipmsgid = msg->id; | |
1295 | parm->db.iptrgcls = msg->class; | |
1296 | } | |
1297 | rc = iucv_call_b2f0(IUCV_REPLY, parm); | |
6c005961 | 1298 | out: |
2356f4cb MS |
1299 | local_bh_enable(); |
1300 | return rc; | |
1301 | } | |
da99f056 | 1302 | EXPORT_SYMBOL(iucv_message_reply); |
2356f4cb MS |
1303 | |
1304 | /** | |
91d5d45e | 1305 | * __iucv_message_send |
2356f4cb MS |
1306 | * @path: address of iucv path structure |
1307 | * @msg: address of iucv msg structure | |
1308 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1309 | * @srccls: source class of message | |
1310 | * @buffer: address of send buffer or address of struct iucv_array | |
1311 | * @size: length of send buffer | |
1312 | * | |
1313 | * This function transmits data to another application. Data to be | |
1314 | * transmitted is in a buffer and this is a one-way message and the | |
1315 | * receiver will not reply to the message. | |
1316 | * | |
91d5d45e HB |
1317 | * Locking: no locking |
1318 | * | |
2356f4cb MS |
1319 | * Returns the result from the CP IUCV call. |
1320 | */ | |
91d5d45e | 1321 | int __iucv_message_send(struct iucv_path *path, struct iucv_message *msg, |
2356f4cb MS |
1322 | u8 flags, u32 srccls, void *buffer, size_t size) |
1323 | { | |
1324 | union iucv_param *parm; | |
1325 | int rc; | |
1326 | ||
d28ecab0 | 1327 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1328 | rc = -EIO; |
1329 | goto out; | |
1330 | } | |
70cf5035 | 1331 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1332 | memset(parm, 0, sizeof(union iucv_param)); |
1333 | if (flags & IUCV_IPRMDATA) { | |
1334 | /* Message of 8 bytes can be placed into the parameter list. */ | |
1335 | parm->dpl.ippathid = path->pathid; | |
1336 | parm->dpl.ipflags1 = flags | IUCV_IPNORPY; | |
1337 | parm->dpl.iptrgcls = msg->class; | |
1338 | parm->dpl.ipsrccls = srccls; | |
1339 | parm->dpl.ipmsgtag = msg->tag; | |
1340 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1341 | } else { | |
1342 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1343 | parm->db.ipbfln1f = (u32) size; | |
1344 | parm->db.ippathid = path->pathid; | |
1345 | parm->db.ipflags1 = flags | IUCV_IPNORPY; | |
1346 | parm->db.iptrgcls = msg->class; | |
1347 | parm->db.ipsrccls = srccls; | |
1348 | parm->db.ipmsgtag = msg->tag; | |
1349 | } | |
1350 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1351 | if (!rc) | |
1352 | msg->id = parm->db.ipmsgid; | |
6c005961 | 1353 | out: |
91d5d45e HB |
1354 | return rc; |
1355 | } | |
1356 | EXPORT_SYMBOL(__iucv_message_send); | |
1357 | ||
1358 | /** | |
1359 | * iucv_message_send | |
1360 | * @path: address of iucv path structure | |
1361 | * @msg: address of iucv msg structure | |
1362 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) | |
1363 | * @srccls: source class of message | |
1364 | * @buffer: address of send buffer or address of struct iucv_array | |
1365 | * @size: length of send buffer | |
1366 | * | |
1367 | * This function transmits data to another application. Data to be | |
1368 | * transmitted is in a buffer and this is a one-way message and the | |
1369 | * receiver will not reply to the message. | |
1370 | * | |
1371 | * Locking: local_bh_enable/local_bh_disable | |
1372 | * | |
1373 | * Returns the result from the CP IUCV call. | |
1374 | */ | |
1375 | int iucv_message_send(struct iucv_path *path, struct iucv_message *msg, | |
1376 | u8 flags, u32 srccls, void *buffer, size_t size) | |
1377 | { | |
1378 | int rc; | |
1379 | ||
1380 | local_bh_disable(); | |
1381 | rc = __iucv_message_send(path, msg, flags, srccls, buffer, size); | |
2356f4cb MS |
1382 | local_bh_enable(); |
1383 | return rc; | |
1384 | } | |
da99f056 | 1385 | EXPORT_SYMBOL(iucv_message_send); |
2356f4cb MS |
1386 | |
1387 | /** | |
1388 | * iucv_message_send2way | |
1389 | * @path: address of iucv path structure | |
1390 | * @msg: address of iucv msg structure | |
1391 | * @flags: how the message is sent and the reply is received | |
1392 | * (IUCV_IPRMDATA, IUCV_IPBUFLST, IUCV_IPPRTY, IUCV_ANSLST) | |
1393 | * @srccls: source class of message | |
1394 | * @buffer: address of send buffer or address of struct iucv_array | |
1395 | * @size: length of send buffer | |
1396 | * @ansbuf: address of answer buffer or address of struct iucv_array | |
1397 | * @asize: size of reply buffer | |
1398 | * | |
1399 | * This function transmits data to another application. Data to be | |
1400 | * transmitted is in a buffer. The receiver of the send is expected to | |
1401 | * reply to the message and a buffer is provided into which IUCV moves | |
1402 | * the reply to this message. | |
1403 | * | |
1404 | * Returns the result from the CP IUCV call. | |
1405 | */ | |
1406 | int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg, | |
1407 | u8 flags, u32 srccls, void *buffer, size_t size, | |
1408 | void *answer, size_t asize, size_t *residual) | |
1409 | { | |
1410 | union iucv_param *parm; | |
1411 | int rc; | |
1412 | ||
1413 | local_bh_disable(); | |
d28ecab0 | 1414 | if (cpus_empty(iucv_buffer_cpumask)) { |
6c005961 UB |
1415 | rc = -EIO; |
1416 | goto out; | |
1417 | } | |
70cf5035 | 1418 | parm = iucv_param[smp_processor_id()]; |
2356f4cb MS |
1419 | memset(parm, 0, sizeof(union iucv_param)); |
1420 | if (flags & IUCV_IPRMDATA) { | |
1421 | parm->dpl.ippathid = path->pathid; | |
1422 | parm->dpl.ipflags1 = path->flags; /* priority message */ | |
1423 | parm->dpl.iptrgcls = msg->class; | |
1424 | parm->dpl.ipsrccls = srccls; | |
1425 | parm->dpl.ipmsgtag = msg->tag; | |
1426 | parm->dpl.ipbfadr2 = (u32)(addr_t) answer; | |
1427 | parm->dpl.ipbfln2f = (u32) asize; | |
1428 | memcpy(parm->dpl.iprmmsg, buffer, 8); | |
1429 | } else { | |
1430 | parm->db.ippathid = path->pathid; | |
1431 | parm->db.ipflags1 = path->flags; /* priority message */ | |
1432 | parm->db.iptrgcls = msg->class; | |
1433 | parm->db.ipsrccls = srccls; | |
1434 | parm->db.ipmsgtag = msg->tag; | |
1435 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; | |
1436 | parm->db.ipbfln1f = (u32) size; | |
1437 | parm->db.ipbfadr2 = (u32)(addr_t) answer; | |
1438 | parm->db.ipbfln2f = (u32) asize; | |
1439 | } | |
1440 | rc = iucv_call_b2f0(IUCV_SEND, parm); | |
1441 | if (!rc) | |
1442 | msg->id = parm->db.ipmsgid; | |
6c005961 | 1443 | out: |
2356f4cb MS |
1444 | local_bh_enable(); |
1445 | return rc; | |
1446 | } | |
da99f056 | 1447 | EXPORT_SYMBOL(iucv_message_send2way); |
2356f4cb MS |
1448 | |
1449 | /** | |
1450 | * iucv_path_pending | |
1451 | * @data: Pointer to external interrupt buffer | |
1452 | * | |
1453 | * Process connection pending work item. Called from tasklet while holding | |
1454 | * iucv_table_lock. | |
1455 | */ | |
1456 | struct iucv_path_pending { | |
1457 | u16 ippathid; | |
1458 | u8 ipflags1; | |
1459 | u8 iptype; | |
1460 | u16 ipmsglim; | |
1461 | u16 res1; | |
1462 | u8 ipvmid[8]; | |
1463 | u8 ipuser[16]; | |
1464 | u32 res3; | |
1465 | u8 ippollfg; | |
1466 | u8 res4[3]; | |
bc10502d | 1467 | } __packed; |
2356f4cb MS |
1468 | |
1469 | static void iucv_path_pending(struct iucv_irq_data *data) | |
1470 | { | |
1471 | struct iucv_path_pending *ipp = (void *) data; | |
1472 | struct iucv_handler *handler; | |
1473 | struct iucv_path *path; | |
1474 | char *error; | |
1475 | ||
1476 | BUG_ON(iucv_path_table[ipp->ippathid]); | |
1477 | /* New pathid, handler found. Create a new path struct. */ | |
1478 | error = iucv_error_no_memory; | |
1479 | path = iucv_path_alloc(ipp->ipmsglim, ipp->ipflags1, GFP_ATOMIC); | |
1480 | if (!path) | |
1481 | goto out_sever; | |
1482 | path->pathid = ipp->ippathid; | |
1483 | iucv_path_table[path->pathid] = path; | |
1484 | EBCASC(ipp->ipvmid, 8); | |
1485 | ||
1486 | /* Call registered handler until one is found that wants the path. */ | |
1487 | list_for_each_entry(handler, &iucv_handler_list, list) { | |
1488 | if (!handler->path_pending) | |
1489 | continue; | |
1490 | /* | |
1491 | * Add path to handler to allow a call to iucv_path_sever | |
1492 | * inside the path_pending function. If the handler returns | |
1493 | * an error remove the path from the handler again. | |
1494 | */ | |
1495 | list_add(&path->list, &handler->paths); | |
1496 | path->handler = handler; | |
1497 | if (!handler->path_pending(path, ipp->ipvmid, ipp->ipuser)) | |
1498 | return; | |
1499 | list_del(&path->list); | |
1500 | path->handler = NULL; | |
1501 | } | |
1502 | /* No handler wanted the path. */ | |
1503 | iucv_path_table[path->pathid] = NULL; | |
1504 | iucv_path_free(path); | |
1505 | error = iucv_error_no_listener; | |
1506 | out_sever: | |
1507 | iucv_sever_pathid(ipp->ippathid, error); | |
1508 | } | |
1509 | ||
1510 | /** | |
1511 | * iucv_path_complete | |
1512 | * @data: Pointer to external interrupt buffer | |
1513 | * | |
1514 | * Process connection complete work item. Called from tasklet while holding | |
1515 | * iucv_table_lock. | |
1516 | */ | |
1517 | struct iucv_path_complete { | |
1518 | u16 ippathid; | |
1519 | u8 ipflags1; | |
1520 | u8 iptype; | |
1521 | u16 ipmsglim; | |
1522 | u16 res1; | |
1523 | u8 res2[8]; | |
1524 | u8 ipuser[16]; | |
1525 | u32 res3; | |
1526 | u8 ippollfg; | |
1527 | u8 res4[3]; | |
bc10502d | 1528 | } __packed; |
2356f4cb MS |
1529 | |
1530 | static void iucv_path_complete(struct iucv_irq_data *data) | |
1531 | { | |
1532 | struct iucv_path_complete *ipc = (void *) data; | |
1533 | struct iucv_path *path = iucv_path_table[ipc->ippathid]; | |
1534 | ||
b8942e3b HB |
1535 | if (path) |
1536 | path->flags = ipc->ipflags1; | |
04b090d5 | 1537 | if (path && path->handler && path->handler->path_complete) |
2356f4cb MS |
1538 | path->handler->path_complete(path, ipc->ipuser); |
1539 | } | |
1540 | ||
1541 | /** | |
1542 | * iucv_path_severed | |
1543 | * @data: Pointer to external interrupt buffer | |
1544 | * | |
1545 | * Process connection severed work item. Called from tasklet while holding | |
1546 | * iucv_table_lock. | |
1547 | */ | |
1548 | struct iucv_path_severed { | |
1549 | u16 ippathid; | |
1550 | u8 res1; | |
1551 | u8 iptype; | |
1552 | u32 res2; | |
1553 | u8 res3[8]; | |
1554 | u8 ipuser[16]; | |
1555 | u32 res4; | |
1556 | u8 ippollfg; | |
1557 | u8 res5[3]; | |
bc10502d | 1558 | } __packed; |
2356f4cb MS |
1559 | |
1560 | static void iucv_path_severed(struct iucv_irq_data *data) | |
1561 | { | |
1562 | struct iucv_path_severed *ips = (void *) data; | |
1563 | struct iucv_path *path = iucv_path_table[ips->ippathid]; | |
1564 | ||
04b090d5 MS |
1565 | if (!path || !path->handler) /* Already severed */ |
1566 | return; | |
2356f4cb MS |
1567 | if (path->handler->path_severed) |
1568 | path->handler->path_severed(path, ips->ipuser); | |
1569 | else { | |
1570 | iucv_sever_pathid(path->pathid, NULL); | |
1571 | iucv_path_table[path->pathid] = NULL; | |
42e1b4c2 | 1572 | list_del(&path->list); |
2356f4cb MS |
1573 | iucv_path_free(path); |
1574 | } | |
1575 | } | |
1576 | ||
1577 | /** | |
1578 | * iucv_path_quiesced | |
1579 | * @data: Pointer to external interrupt buffer | |
1580 | * | |
1581 | * Process connection quiesced work item. Called from tasklet while holding | |
1582 | * iucv_table_lock. | |
1583 | */ | |
1584 | struct iucv_path_quiesced { | |
1585 | u16 ippathid; | |
1586 | u8 res1; | |
1587 | u8 iptype; | |
1588 | u32 res2; | |
1589 | u8 res3[8]; | |
1590 | u8 ipuser[16]; | |
1591 | u32 res4; | |
1592 | u8 ippollfg; | |
1593 | u8 res5[3]; | |
bc10502d | 1594 | } __packed; |
2356f4cb MS |
1595 | |
1596 | static void iucv_path_quiesced(struct iucv_irq_data *data) | |
1597 | { | |
1598 | struct iucv_path_quiesced *ipq = (void *) data; | |
1599 | struct iucv_path *path = iucv_path_table[ipq->ippathid]; | |
1600 | ||
04b090d5 | 1601 | if (path && path->handler && path->handler->path_quiesced) |
2356f4cb MS |
1602 | path->handler->path_quiesced(path, ipq->ipuser); |
1603 | } | |
1604 | ||
1605 | /** | |
1606 | * iucv_path_resumed | |
1607 | * @data: Pointer to external interrupt buffer | |
1608 | * | |
1609 | * Process connection resumed work item. Called from tasklet while holding | |
1610 | * iucv_table_lock. | |
1611 | */ | |
1612 | struct iucv_path_resumed { | |
1613 | u16 ippathid; | |
1614 | u8 res1; | |
1615 | u8 iptype; | |
1616 | u32 res2; | |
1617 | u8 res3[8]; | |
1618 | u8 ipuser[16]; | |
1619 | u32 res4; | |
1620 | u8 ippollfg; | |
1621 | u8 res5[3]; | |
bc10502d | 1622 | } __packed; |
2356f4cb MS |
1623 | |
1624 | static void iucv_path_resumed(struct iucv_irq_data *data) | |
1625 | { | |
1626 | struct iucv_path_resumed *ipr = (void *) data; | |
1627 | struct iucv_path *path = iucv_path_table[ipr->ippathid]; | |
1628 | ||
04b090d5 | 1629 | if (path && path->handler && path->handler->path_resumed) |
2356f4cb MS |
1630 | path->handler->path_resumed(path, ipr->ipuser); |
1631 | } | |
1632 | ||
1633 | /** | |
1634 | * iucv_message_complete | |
1635 | * @data: Pointer to external interrupt buffer | |
1636 | * | |
1637 | * Process message complete work item. Called from tasklet while holding | |
1638 | * iucv_table_lock. | |
1639 | */ | |
1640 | struct iucv_message_complete { | |
1641 | u16 ippathid; | |
1642 | u8 ipflags1; | |
1643 | u8 iptype; | |
1644 | u32 ipmsgid; | |
1645 | u32 ipaudit; | |
1646 | u8 iprmmsg[8]; | |
1647 | u32 ipsrccls; | |
1648 | u32 ipmsgtag; | |
1649 | u32 res; | |
1650 | u32 ipbfln2f; | |
1651 | u8 ippollfg; | |
1652 | u8 res2[3]; | |
bc10502d | 1653 | } __packed; |
2356f4cb MS |
1654 | |
1655 | static void iucv_message_complete(struct iucv_irq_data *data) | |
1656 | { | |
1657 | struct iucv_message_complete *imc = (void *) data; | |
1658 | struct iucv_path *path = iucv_path_table[imc->ippathid]; | |
1659 | struct iucv_message msg; | |
1660 | ||
04b090d5 | 1661 | if (path && path->handler && path->handler->message_complete) { |
2356f4cb MS |
1662 | msg.flags = imc->ipflags1; |
1663 | msg.id = imc->ipmsgid; | |
1664 | msg.audit = imc->ipaudit; | |
1665 | memcpy(msg.rmmsg, imc->iprmmsg, 8); | |
1666 | msg.class = imc->ipsrccls; | |
1667 | msg.tag = imc->ipmsgtag; | |
1668 | msg.length = imc->ipbfln2f; | |
1669 | path->handler->message_complete(path, &msg); | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | /** | |
1674 | * iucv_message_pending | |
1675 | * @data: Pointer to external interrupt buffer | |
1676 | * | |
1677 | * Process message pending work item. Called from tasklet while holding | |
1678 | * iucv_table_lock. | |
1679 | */ | |
1680 | struct iucv_message_pending { | |
1681 | u16 ippathid; | |
1682 | u8 ipflags1; | |
1683 | u8 iptype; | |
1684 | u32 ipmsgid; | |
1685 | u32 iptrgcls; | |
1686 | union { | |
1687 | u32 iprmmsg1_u32; | |
1688 | u8 iprmmsg1[4]; | |
1689 | } ln1msg1; | |
1690 | union { | |
1691 | u32 ipbfln1f; | |
1692 | u8 iprmmsg2[4]; | |
1693 | } ln1msg2; | |
1694 | u32 res1[3]; | |
1695 | u32 ipbfln2f; | |
1696 | u8 ippollfg; | |
1697 | u8 res2[3]; | |
bc10502d | 1698 | } __packed; |
2356f4cb MS |
1699 | |
1700 | static void iucv_message_pending(struct iucv_irq_data *data) | |
1701 | { | |
1702 | struct iucv_message_pending *imp = (void *) data; | |
1703 | struct iucv_path *path = iucv_path_table[imp->ippathid]; | |
1704 | struct iucv_message msg; | |
1705 | ||
04b090d5 | 1706 | if (path && path->handler && path->handler->message_pending) { |
2356f4cb MS |
1707 | msg.flags = imp->ipflags1; |
1708 | msg.id = imp->ipmsgid; | |
1709 | msg.class = imp->iptrgcls; | |
1710 | if (imp->ipflags1 & IUCV_IPRMDATA) { | |
1711 | memcpy(msg.rmmsg, imp->ln1msg1.iprmmsg1, 8); | |
1712 | msg.length = 8; | |
1713 | } else | |
1714 | msg.length = imp->ln1msg2.ipbfln1f; | |
1715 | msg.reply_size = imp->ipbfln2f; | |
1716 | path->handler->message_pending(path, &msg); | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | /** | |
04b090d5 | 1721 | * iucv_tasklet_fn: |
2356f4cb MS |
1722 | * |
1723 | * This tasklet loops over the queue of irq buffers created by | |
1724 | * iucv_external_interrupt, calls the appropriate action handler | |
1725 | * and then frees the buffer. | |
1726 | */ | |
04b090d5 | 1727 | static void iucv_tasklet_fn(unsigned long ignored) |
2356f4cb MS |
1728 | { |
1729 | typedef void iucv_irq_fn(struct iucv_irq_data *); | |
1730 | static iucv_irq_fn *irq_fn[] = { | |
2356f4cb MS |
1731 | [0x02] = iucv_path_complete, |
1732 | [0x03] = iucv_path_severed, | |
1733 | [0x04] = iucv_path_quiesced, | |
1734 | [0x05] = iucv_path_resumed, | |
1735 | [0x06] = iucv_message_complete, | |
1736 | [0x07] = iucv_message_complete, | |
1737 | [0x08] = iucv_message_pending, | |
1738 | [0x09] = iucv_message_pending, | |
1739 | }; | |
b5e78337 | 1740 | LIST_HEAD(task_queue); |
04b090d5 | 1741 | struct iucv_irq_list *p, *n; |
2356f4cb MS |
1742 | |
1743 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
13fdc9a7 UB |
1744 | if (!spin_trylock(&iucv_table_lock)) { |
1745 | tasklet_schedule(&iucv_tasklet); | |
1746 | return; | |
1747 | } | |
04b090d5 | 1748 | iucv_active_cpu = smp_processor_id(); |
2356f4cb | 1749 | |
04b090d5 MS |
1750 | spin_lock_irq(&iucv_queue_lock); |
1751 | list_splice_init(&iucv_task_queue, &task_queue); | |
1752 | spin_unlock_irq(&iucv_queue_lock); | |
1753 | ||
1754 | list_for_each_entry_safe(p, n, &task_queue, list) { | |
2356f4cb | 1755 | list_del_init(&p->list); |
2356f4cb MS |
1756 | irq_fn[p->data.iptype](&p->data); |
1757 | kfree(p); | |
2356f4cb | 1758 | } |
2356f4cb | 1759 | |
04b090d5 | 1760 | iucv_active_cpu = -1; |
2356f4cb MS |
1761 | spin_unlock(&iucv_table_lock); |
1762 | } | |
1763 | ||
04b090d5 MS |
1764 | /** |
1765 | * iucv_work_fn: | |
1766 | * | |
1767 | * This work function loops over the queue of path pending irq blocks | |
1768 | * created by iucv_external_interrupt, calls the appropriate action | |
1769 | * handler and then frees the buffer. | |
1770 | */ | |
1771 | static void iucv_work_fn(struct work_struct *work) | |
1772 | { | |
b5e78337 | 1773 | LIST_HEAD(work_queue); |
04b090d5 MS |
1774 | struct iucv_irq_list *p, *n; |
1775 | ||
1776 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ | |
1777 | spin_lock_bh(&iucv_table_lock); | |
1778 | iucv_active_cpu = smp_processor_id(); | |
1779 | ||
1780 | spin_lock_irq(&iucv_queue_lock); | |
1781 | list_splice_init(&iucv_work_queue, &work_queue); | |
1782 | spin_unlock_irq(&iucv_queue_lock); | |
1783 | ||
1784 | iucv_cleanup_queue(); | |
1785 | list_for_each_entry_safe(p, n, &work_queue, list) { | |
1786 | list_del_init(&p->list); | |
1787 | iucv_path_pending(&p->data); | |
1788 | kfree(p); | |
1789 | } | |
1790 | ||
1791 | iucv_active_cpu = -1; | |
1792 | spin_unlock_bh(&iucv_table_lock); | |
1793 | } | |
1794 | ||
2356f4cb MS |
1795 | /** |
1796 | * iucv_external_interrupt | |
1797 | * @code: irq code | |
1798 | * | |
1799 | * Handles external interrupts coming in from CP. | |
04b090d5 | 1800 | * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn(). |
2356f4cb | 1801 | */ |
f6649a7e MS |
1802 | static void iucv_external_interrupt(unsigned int ext_int_code, |
1803 | unsigned int param32, unsigned long param64) | |
2356f4cb MS |
1804 | { |
1805 | struct iucv_irq_data *p; | |
04b090d5 | 1806 | struct iucv_irq_list *work; |
2356f4cb | 1807 | |
052ff461 | 1808 | kstat_cpu(smp_processor_id()).irqs[EXTINT_IUC]++; |
70cf5035 | 1809 | p = iucv_irq_data[smp_processor_id()]; |
2356f4cb | 1810 | if (p->ippathid >= iucv_max_pathid) { |
c2b4afd2 | 1811 | WARN_ON(p->ippathid >= iucv_max_pathid); |
2356f4cb MS |
1812 | iucv_sever_pathid(p->ippathid, iucv_error_no_listener); |
1813 | return; | |
1814 | } | |
c2b4afd2 | 1815 | BUG_ON(p->iptype < 0x01 || p->iptype > 0x09); |
04b090d5 | 1816 | work = kmalloc(sizeof(struct iucv_irq_list), GFP_ATOMIC); |
2356f4cb | 1817 | if (!work) { |
8f7c502c | 1818 | pr_warning("iucv_external_interrupt: out of memory\n"); |
2356f4cb MS |
1819 | return; |
1820 | } | |
1821 | memcpy(&work->data, p, sizeof(work->data)); | |
04b090d5 MS |
1822 | spin_lock(&iucv_queue_lock); |
1823 | if (p->iptype == 0x01) { | |
1824 | /* Path pending interrupt. */ | |
1825 | list_add_tail(&work->list, &iucv_work_queue); | |
1826 | schedule_work(&iucv_work); | |
1827 | } else { | |
1828 | /* The other interrupts. */ | |
1829 | list_add_tail(&work->list, &iucv_task_queue); | |
1830 | tasklet_schedule(&iucv_tasklet); | |
1831 | } | |
1832 | spin_unlock(&iucv_queue_lock); | |
2356f4cb MS |
1833 | } |
1834 | ||
672e405b UB |
1835 | static int iucv_pm_prepare(struct device *dev) |
1836 | { | |
1837 | int rc = 0; | |
1838 | ||
1839 | #ifdef CONFIG_PM_DEBUG | |
1840 | printk(KERN_INFO "iucv_pm_prepare\n"); | |
1841 | #endif | |
1842 | if (dev->driver && dev->driver->pm && dev->driver->pm->prepare) | |
1843 | rc = dev->driver->pm->prepare(dev); | |
1844 | return rc; | |
1845 | } | |
1846 | ||
1847 | static void iucv_pm_complete(struct device *dev) | |
1848 | { | |
1849 | #ifdef CONFIG_PM_DEBUG | |
1850 | printk(KERN_INFO "iucv_pm_complete\n"); | |
1851 | #endif | |
1852 | if (dev->driver && dev->driver->pm && dev->driver->pm->complete) | |
1853 | dev->driver->pm->complete(dev); | |
1854 | } | |
1855 | ||
1856 | /** | |
1857 | * iucv_path_table_empty() - determine if iucv path table is empty | |
1858 | * | |
1859 | * Returns 0 if there are still iucv pathes defined | |
1860 | * 1 if there are no iucv pathes defined | |
1861 | */ | |
1862 | int iucv_path_table_empty(void) | |
1863 | { | |
1864 | int i; | |
1865 | ||
1866 | for (i = 0; i < iucv_max_pathid; i++) { | |
1867 | if (iucv_path_table[i]) | |
1868 | return 0; | |
1869 | } | |
1870 | return 1; | |
1871 | } | |
1872 | ||
1873 | /** | |
1874 | * iucv_pm_freeze() - Freeze PM callback | |
1875 | * @dev: iucv-based device | |
1876 | * | |
1877 | * disable iucv interrupts | |
1878 | * invoke callback function of the iucv-based driver | |
1879 | * shut down iucv, if no iucv-pathes are established anymore | |
1880 | */ | |
1881 | static int iucv_pm_freeze(struct device *dev) | |
1882 | { | |
1883 | int cpu; | |
b7c2aecc | 1884 | struct iucv_irq_list *p, *n; |
672e405b UB |
1885 | int rc = 0; |
1886 | ||
1887 | #ifdef CONFIG_PM_DEBUG | |
1888 | printk(KERN_WARNING "iucv_pm_freeze\n"); | |
1889 | #endif | |
b7c2aecc UB |
1890 | if (iucv_pm_state != IUCV_PM_FREEZING) { |
1891 | for_each_cpu_mask_nr(cpu, iucv_irq_cpumask) | |
1892 | smp_call_function_single(cpu, iucv_block_cpu_almost, | |
1893 | NULL, 1); | |
1894 | cancel_work_sync(&iucv_work); | |
1895 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) { | |
1896 | list_del_init(&p->list); | |
1897 | iucv_sever_pathid(p->data.ippathid, | |
1898 | iucv_error_no_listener); | |
1899 | kfree(p); | |
1900 | } | |
1901 | } | |
4c89d86b | 1902 | iucv_pm_state = IUCV_PM_FREEZING; |
672e405b UB |
1903 | if (dev->driver && dev->driver->pm && dev->driver->pm->freeze) |
1904 | rc = dev->driver->pm->freeze(dev); | |
1905 | if (iucv_path_table_empty()) | |
1906 | iucv_disable(); | |
1907 | return rc; | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * iucv_pm_thaw() - Thaw PM callback | |
1912 | * @dev: iucv-based device | |
1913 | * | |
1914 | * make iucv ready for use again: allocate path table, declare interrupt buffers | |
1915 | * and enable iucv interrupts | |
1916 | * invoke callback function of the iucv-based driver | |
1917 | */ | |
1918 | static int iucv_pm_thaw(struct device *dev) | |
1919 | { | |
1920 | int rc = 0; | |
1921 | ||
1922 | #ifdef CONFIG_PM_DEBUG | |
1923 | printk(KERN_WARNING "iucv_pm_thaw\n"); | |
1924 | #endif | |
4c89d86b | 1925 | iucv_pm_state = IUCV_PM_THAWING; |
672e405b UB |
1926 | if (!iucv_path_table) { |
1927 | rc = iucv_enable(); | |
1928 | if (rc) | |
1929 | goto out; | |
1930 | } | |
1931 | if (cpus_empty(iucv_irq_cpumask)) { | |
1932 | if (iucv_nonsmp_handler) | |
1933 | /* enable interrupts on one cpu */ | |
1934 | iucv_allow_cpu(NULL); | |
1935 | else | |
1936 | /* enable interrupts on all cpus */ | |
1937 | iucv_setmask_mp(); | |
1938 | } | |
1939 | if (dev->driver && dev->driver->pm && dev->driver->pm->thaw) | |
1940 | rc = dev->driver->pm->thaw(dev); | |
1941 | out: | |
1942 | return rc; | |
1943 | } | |
1944 | ||
1945 | /** | |
1946 | * iucv_pm_restore() - Restore PM callback | |
1947 | * @dev: iucv-based device | |
1948 | * | |
1949 | * make iucv ready for use again: allocate path table, declare interrupt buffers | |
1950 | * and enable iucv interrupts | |
1951 | * invoke callback function of the iucv-based driver | |
1952 | */ | |
1953 | static int iucv_pm_restore(struct device *dev) | |
1954 | { | |
1955 | int rc = 0; | |
1956 | ||
1957 | #ifdef CONFIG_PM_DEBUG | |
1958 | printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table); | |
1959 | #endif | |
4c89d86b UB |
1960 | if ((iucv_pm_state != IUCV_PM_RESTORING) && iucv_path_table) |
1961 | pr_warning("Suspending Linux did not completely close all IUCV " | |
1962 | "connections\n"); | |
1963 | iucv_pm_state = IUCV_PM_RESTORING; | |
672e405b UB |
1964 | if (cpus_empty(iucv_irq_cpumask)) { |
1965 | rc = iucv_query_maxconn(); | |
1966 | rc = iucv_enable(); | |
1967 | if (rc) | |
1968 | goto out; | |
1969 | } | |
1970 | if (dev->driver && dev->driver->pm && dev->driver->pm->restore) | |
1971 | rc = dev->driver->pm->restore(dev); | |
1972 | out: | |
1973 | return rc; | |
1974 | } | |
1975 | ||
2356f4cb MS |
1976 | /** |
1977 | * iucv_init | |
1978 | * | |
1979 | * Allocates and initializes various data structures. | |
1980 | */ | |
da99f056 | 1981 | static int __init iucv_init(void) |
2356f4cb MS |
1982 | { |
1983 | int rc; | |
70cf5035 | 1984 | int cpu; |
2356f4cb MS |
1985 | |
1986 | if (!MACHINE_IS_VM) { | |
1987 | rc = -EPROTONOSUPPORT; | |
1988 | goto out; | |
1989 | } | |
1990 | rc = iucv_query_maxconn(); | |
1991 | if (rc) | |
1992 | goto out; | |
da99f056 | 1993 | rc = register_external_interrupt(0x4000, iucv_external_interrupt); |
2356f4cb MS |
1994 | if (rc) |
1995 | goto out; | |
035da16f | 1996 | iucv_root = root_device_register("iucv"); |
2356f4cb MS |
1997 | if (IS_ERR(iucv_root)) { |
1998 | rc = PTR_ERR(iucv_root); | |
2d7bf367 | 1999 | goto out_int; |
2356f4cb | 2000 | } |
70cf5035 CL |
2001 | |
2002 | for_each_online_cpu(cpu) { | |
2003 | /* Note: GFP_DMA used to get memory below 2G */ | |
2004 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), | |
2005 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2006 | if (!iucv_irq_data[cpu]) { | |
2007 | rc = -ENOMEM; | |
2008 | goto out_free; | |
2009 | } | |
2010 | ||
2011 | /* Allocate parameter blocks. */ | |
2012 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), | |
2013 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2014 | if (!iucv_param[cpu]) { | |
2015 | rc = -ENOMEM; | |
2016 | goto out_free; | |
2017 | } | |
42e1b4c2 UB |
2018 | iucv_param_irq[cpu] = kmalloc_node(sizeof(union iucv_param), |
2019 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); | |
2020 | if (!iucv_param_irq[cpu]) { | |
2021 | rc = -ENOMEM; | |
2022 | goto out_free; | |
2023 | } | |
2024 | ||
2356f4cb | 2025 | } |
2d7bf367 CH |
2026 | rc = register_hotcpu_notifier(&iucv_cpu_notifier); |
2027 | if (rc) | |
2028 | goto out_free; | |
6c005961 UB |
2029 | rc = register_reboot_notifier(&iucv_reboot_notifier); |
2030 | if (rc) | |
2031 | goto out_cpu; | |
2356f4cb MS |
2032 | ASCEBC(iucv_error_no_listener, 16); |
2033 | ASCEBC(iucv_error_no_memory, 16); | |
2034 | ASCEBC(iucv_error_pathid, 16); | |
2035 | iucv_available = 1; | |
2d7bf367 CH |
2036 | rc = bus_register(&iucv_bus); |
2037 | if (rc) | |
6c005961 | 2038 | goto out_reboot; |
2356f4cb MS |
2039 | return 0; |
2040 | ||
6c005961 UB |
2041 | out_reboot: |
2042 | unregister_reboot_notifier(&iucv_reboot_notifier); | |
2d7bf367 CH |
2043 | out_cpu: |
2044 | unregister_hotcpu_notifier(&iucv_cpu_notifier); | |
70cf5035 CL |
2045 | out_free: |
2046 | for_each_possible_cpu(cpu) { | |
42e1b4c2 UB |
2047 | kfree(iucv_param_irq[cpu]); |
2048 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
2049 | kfree(iucv_param[cpu]); |
2050 | iucv_param[cpu] = NULL; | |
2051 | kfree(iucv_irq_data[cpu]); | |
2052 | iucv_irq_data[cpu] = NULL; | |
2053 | } | |
035da16f | 2054 | root_device_unregister(iucv_root); |
2356f4cb MS |
2055 | out_int: |
2056 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
2057 | out: | |
2058 | return rc; | |
2059 | } | |
2060 | ||
2061 | /** | |
2062 | * iucv_exit | |
2063 | * | |
2064 | * Frees everything allocated from iucv_init. | |
2065 | */ | |
da99f056 | 2066 | static void __exit iucv_exit(void) |
2356f4cb | 2067 | { |
04b090d5 | 2068 | struct iucv_irq_list *p, *n; |
70cf5035 | 2069 | int cpu; |
2356f4cb | 2070 | |
04b090d5 MS |
2071 | spin_lock_irq(&iucv_queue_lock); |
2072 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) | |
2073 | kfree(p); | |
2356f4cb MS |
2074 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) |
2075 | kfree(p); | |
04b090d5 | 2076 | spin_unlock_irq(&iucv_queue_lock); |
6c005961 | 2077 | unregister_reboot_notifier(&iucv_reboot_notifier); |
2356f4cb | 2078 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
70cf5035 | 2079 | for_each_possible_cpu(cpu) { |
42e1b4c2 UB |
2080 | kfree(iucv_param_irq[cpu]); |
2081 | iucv_param_irq[cpu] = NULL; | |
70cf5035 CL |
2082 | kfree(iucv_param[cpu]); |
2083 | iucv_param[cpu] = NULL; | |
2084 | kfree(iucv_irq_data[cpu]); | |
2085 | iucv_irq_data[cpu] = NULL; | |
2086 | } | |
035da16f | 2087 | root_device_unregister(iucv_root); |
2356f4cb MS |
2088 | bus_unregister(&iucv_bus); |
2089 | unregister_external_interrupt(0x4000, iucv_external_interrupt); | |
2090 | } | |
2091 | ||
2092 | subsys_initcall(iucv_init); | |
2093 | module_exit(iucv_exit); | |
2094 | ||
2356f4cb MS |
2095 | MODULE_AUTHOR("(C) 2001 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); |
2096 | MODULE_DESCRIPTION("Linux for S/390 IUCV lowlevel driver"); | |
2097 | MODULE_LICENSE("GPL"); |