Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * IUCV base infrastructure. |
| 3 | * |
| 4 | * Copyright 2001, 2006 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 5 | * Author(s): |
| 6 | * Original source: |
| 7 | * Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000 |
| 8 | * Xenia Tkatschow (xenia@us.ibm.com) |
| 9 | * 2Gb awareness and general cleanup: |
| 10 | * Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com) |
| 11 | * Rewritten for af_iucv: |
| 12 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 13 | * |
| 14 | * Documentation used: |
| 15 | * The original source |
| 16 | * CP Programming Service, IBM document # SC24-5760 |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License as published by |
| 20 | * the Free Software Foundation; either version 2, or (at your option) |
| 21 | * any later version. |
| 22 | * |
| 23 | * This program is distributed in the hope that it will be useful, |
| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | * GNU General Public License for more details. |
| 27 | * |
| 28 | * You should have received a copy of the GNU General Public License |
| 29 | * along with this program; if not, write to the Free Software |
| 30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/moduleparam.h> |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 35 | #include <linux/spinlock.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/slab.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/interrupt.h> |
| 40 | #include <linux/list.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/err.h> |
| 43 | #include <linux/device.h> |
| 44 | #include <linux/cpu.h> |
| 45 | #include <net/iucv/iucv.h> |
| 46 | #include <asm/atomic.h> |
| 47 | #include <asm/ebcdic.h> |
| 48 | #include <asm/io.h> |
| 49 | #include <asm/s390_ext.h> |
| 50 | #include <asm/s390_rdev.h> |
| 51 | #include <asm/smp.h> |
| 52 | |
| 53 | /* |
| 54 | * FLAGS: |
| 55 | * All flags are defined in the field IPFLAGS1 of each function |
| 56 | * and can be found in CP Programming Services. |
| 57 | * IPSRCCLS - Indicates you have specified a source class. |
| 58 | * IPTRGCLS - Indicates you have specified a target class. |
| 59 | * IPFGPID - Indicates you have specified a pathid. |
| 60 | * IPFGMID - Indicates you have specified a message ID. |
| 61 | * IPNORPY - Indicates a one-way message. No reply expected. |
| 62 | * IPALL - Indicates that all paths are affected. |
| 63 | */ |
| 64 | #define IUCV_IPSRCCLS 0x01 |
| 65 | #define IUCV_IPTRGCLS 0x01 |
| 66 | #define IUCV_IPFGPID 0x02 |
| 67 | #define IUCV_IPFGMID 0x04 |
| 68 | #define IUCV_IPNORPY 0x10 |
| 69 | #define IUCV_IPALL 0x80 |
| 70 | |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 71 | static int iucv_bus_match(struct device *dev, struct device_driver *drv) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 72 | { |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | struct bus_type iucv_bus = { |
| 77 | .name = "iucv", |
| 78 | .match = iucv_bus_match, |
| 79 | }; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 80 | EXPORT_SYMBOL(iucv_bus); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 81 | |
| 82 | struct device *iucv_root; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 83 | EXPORT_SYMBOL(iucv_root); |
| 84 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 85 | static int iucv_available; |
| 86 | |
| 87 | /* General IUCV interrupt structure */ |
| 88 | struct iucv_irq_data { |
| 89 | u16 ippathid; |
| 90 | u8 ipflags1; |
| 91 | u8 iptype; |
| 92 | u32 res2[8]; |
| 93 | }; |
| 94 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 95 | struct iucv_irq_list { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 96 | struct list_head list; |
| 97 | struct iucv_irq_data data; |
| 98 | }; |
| 99 | |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 100 | static struct iucv_irq_data *iucv_irq_data[NR_CPUS]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 101 | static cpumask_t iucv_buffer_cpumask = CPU_MASK_NONE; |
| 102 | static cpumask_t iucv_irq_cpumask = CPU_MASK_NONE; |
| 103 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 104 | /* |
| 105 | * Queue of interrupt buffers lock for delivery via the tasklet |
| 106 | * (fast but can't call smp_call_function). |
| 107 | */ |
| 108 | static LIST_HEAD(iucv_task_queue); |
| 109 | |
| 110 | /* |
| 111 | * The tasklet for fast delivery of iucv interrupts. |
| 112 | */ |
| 113 | static void iucv_tasklet_fn(unsigned long); |
| 114 | static DECLARE_TASKLET(iucv_tasklet, iucv_tasklet_fn,0); |
| 115 | |
| 116 | /* |
| 117 | * Queue of interrupt buffers for delivery via a work queue |
| 118 | * (slower but can call smp_call_function). |
| 119 | */ |
| 120 | static LIST_HEAD(iucv_work_queue); |
| 121 | |
| 122 | /* |
| 123 | * The work element to deliver path pending interrupts. |
| 124 | */ |
| 125 | static void iucv_work_fn(struct work_struct *work); |
| 126 | static DECLARE_WORK(iucv_work, iucv_work_fn); |
| 127 | |
| 128 | /* |
| 129 | * Spinlock protecting task and work queue. |
| 130 | */ |
| 131 | static DEFINE_SPINLOCK(iucv_queue_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 132 | |
| 133 | enum iucv_command_codes { |
| 134 | IUCV_QUERY = 0, |
| 135 | IUCV_RETRIEVE_BUFFER = 2, |
| 136 | IUCV_SEND = 4, |
| 137 | IUCV_RECEIVE = 5, |
| 138 | IUCV_REPLY = 6, |
| 139 | IUCV_REJECT = 8, |
| 140 | IUCV_PURGE = 9, |
| 141 | IUCV_ACCEPT = 10, |
| 142 | IUCV_CONNECT = 11, |
| 143 | IUCV_DECLARE_BUFFER = 12, |
| 144 | IUCV_QUIESCE = 13, |
| 145 | IUCV_RESUME = 14, |
| 146 | IUCV_SEVER = 15, |
| 147 | IUCV_SETMASK = 16, |
| 148 | }; |
| 149 | |
| 150 | /* |
| 151 | * Error messages that are used with the iucv_sever function. They get |
| 152 | * converted to EBCDIC. |
| 153 | */ |
| 154 | static char iucv_error_no_listener[16] = "NO LISTENER"; |
| 155 | static char iucv_error_no_memory[16] = "NO MEMORY"; |
| 156 | static char iucv_error_pathid[16] = "INVALID PATHID"; |
| 157 | |
| 158 | /* |
| 159 | * iucv_handler_list: List of registered handlers. |
| 160 | */ |
| 161 | static LIST_HEAD(iucv_handler_list); |
| 162 | |
| 163 | /* |
| 164 | * iucv_path_table: an array of iucv_path structures. |
| 165 | */ |
| 166 | static struct iucv_path **iucv_path_table; |
| 167 | static unsigned long iucv_max_pathid; |
| 168 | |
| 169 | /* |
| 170 | * iucv_lock: spinlock protecting iucv_handler_list and iucv_pathid_table |
| 171 | */ |
| 172 | static DEFINE_SPINLOCK(iucv_table_lock); |
| 173 | |
| 174 | /* |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 175 | * iucv_active_cpu: contains the number of the cpu executing the tasklet |
| 176 | * or the work handler. Needed for iucv_path_sever called from tasklet. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 177 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 178 | static int iucv_active_cpu = -1; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 179 | |
| 180 | /* |
| 181 | * Mutex and wait queue for iucv_register/iucv_unregister. |
| 182 | */ |
| 183 | static DEFINE_MUTEX(iucv_register_mutex); |
| 184 | |
| 185 | /* |
| 186 | * Counter for number of non-smp capable handlers. |
| 187 | */ |
| 188 | static int iucv_nonsmp_handler; |
| 189 | |
| 190 | /* |
| 191 | * IUCV control data structure. Used by iucv_path_accept, iucv_path_connect, |
| 192 | * iucv_path_quiesce and iucv_path_sever. |
| 193 | */ |
| 194 | struct iucv_cmd_control { |
| 195 | u16 ippathid; |
| 196 | u8 ipflags1; |
| 197 | u8 iprcode; |
| 198 | u16 ipmsglim; |
| 199 | u16 res1; |
| 200 | u8 ipvmid[8]; |
| 201 | u8 ipuser[16]; |
| 202 | u8 iptarget[8]; |
| 203 | } __attribute__ ((packed,aligned(8))); |
| 204 | |
| 205 | /* |
| 206 | * Data in parameter list iucv structure. Used by iucv_message_send, |
| 207 | * iucv_message_send2way and iucv_message_reply. |
| 208 | */ |
| 209 | struct iucv_cmd_dpl { |
| 210 | u16 ippathid; |
| 211 | u8 ipflags1; |
| 212 | u8 iprcode; |
| 213 | u32 ipmsgid; |
| 214 | u32 iptrgcls; |
| 215 | u8 iprmmsg[8]; |
| 216 | u32 ipsrccls; |
| 217 | u32 ipmsgtag; |
| 218 | u32 ipbfadr2; |
| 219 | u32 ipbfln2f; |
| 220 | u32 res; |
| 221 | } __attribute__ ((packed,aligned(8))); |
| 222 | |
| 223 | /* |
| 224 | * Data in buffer iucv structure. Used by iucv_message_receive, |
| 225 | * iucv_message_reject, iucv_message_send, iucv_message_send2way |
| 226 | * and iucv_declare_cpu. |
| 227 | */ |
| 228 | struct iucv_cmd_db { |
| 229 | u16 ippathid; |
| 230 | u8 ipflags1; |
| 231 | u8 iprcode; |
| 232 | u32 ipmsgid; |
| 233 | u32 iptrgcls; |
| 234 | u32 ipbfadr1; |
| 235 | u32 ipbfln1f; |
| 236 | u32 ipsrccls; |
| 237 | u32 ipmsgtag; |
| 238 | u32 ipbfadr2; |
| 239 | u32 ipbfln2f; |
| 240 | u32 res; |
| 241 | } __attribute__ ((packed,aligned(8))); |
| 242 | |
| 243 | /* |
| 244 | * Purge message iucv structure. Used by iucv_message_purge. |
| 245 | */ |
| 246 | struct iucv_cmd_purge { |
| 247 | u16 ippathid; |
| 248 | u8 ipflags1; |
| 249 | u8 iprcode; |
| 250 | u32 ipmsgid; |
| 251 | u8 ipaudit[3]; |
| 252 | u8 res1[5]; |
| 253 | u32 res2; |
| 254 | u32 ipsrccls; |
| 255 | u32 ipmsgtag; |
| 256 | u32 res3[3]; |
| 257 | } __attribute__ ((packed,aligned(8))); |
| 258 | |
| 259 | /* |
| 260 | * Set mask iucv structure. Used by iucv_enable_cpu. |
| 261 | */ |
| 262 | struct iucv_cmd_set_mask { |
| 263 | u8 ipmask; |
| 264 | u8 res1[2]; |
| 265 | u8 iprcode; |
| 266 | u32 res2[9]; |
| 267 | } __attribute__ ((packed,aligned(8))); |
| 268 | |
| 269 | union iucv_param { |
| 270 | struct iucv_cmd_control ctrl; |
| 271 | struct iucv_cmd_dpl dpl; |
| 272 | struct iucv_cmd_db db; |
| 273 | struct iucv_cmd_purge purge; |
| 274 | struct iucv_cmd_set_mask set_mask; |
| 275 | }; |
| 276 | |
| 277 | /* |
| 278 | * Anchor for per-cpu IUCV command parameter block. |
| 279 | */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 280 | static union iucv_param *iucv_param[NR_CPUS]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 281 | |
| 282 | /** |
| 283 | * iucv_call_b2f0 |
| 284 | * @code: identifier of IUCV call to CP. |
| 285 | * @parm: pointer to a struct iucv_parm block |
| 286 | * |
| 287 | * Calls CP to execute IUCV commands. |
| 288 | * |
| 289 | * Returns the result of the CP IUCV call. |
| 290 | */ |
| 291 | static inline int iucv_call_b2f0(int command, union iucv_param *parm) |
| 292 | { |
| 293 | register unsigned long reg0 asm ("0"); |
| 294 | register unsigned long reg1 asm ("1"); |
| 295 | int ccode; |
| 296 | |
| 297 | reg0 = command; |
| 298 | reg1 = virt_to_phys(parm); |
| 299 | asm volatile( |
| 300 | " .long 0xb2f01000\n" |
| 301 | " ipm %0\n" |
| 302 | " srl %0,28\n" |
| 303 | : "=d" (ccode), "=m" (*parm), "+d" (reg0), "+a" (reg1) |
| 304 | : "m" (*parm) : "cc"); |
| 305 | return (ccode == 1) ? parm->ctrl.iprcode : ccode; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * iucv_query_maxconn |
| 310 | * |
| 311 | * Determines the maximum number of connections that may be established. |
| 312 | * |
| 313 | * Returns the maximum number of connections or -EPERM is IUCV is not |
| 314 | * available. |
| 315 | */ |
| 316 | static int iucv_query_maxconn(void) |
| 317 | { |
| 318 | register unsigned long reg0 asm ("0"); |
| 319 | register unsigned long reg1 asm ("1"); |
| 320 | void *param; |
| 321 | int ccode; |
| 322 | |
| 323 | param = kzalloc(sizeof(union iucv_param), GFP_KERNEL|GFP_DMA); |
| 324 | if (!param) |
| 325 | return -ENOMEM; |
| 326 | reg0 = IUCV_QUERY; |
| 327 | reg1 = (unsigned long) param; |
| 328 | asm volatile ( |
| 329 | " .long 0xb2f01000\n" |
| 330 | " ipm %0\n" |
| 331 | " srl %0,28\n" |
| 332 | : "=d" (ccode), "+d" (reg0), "+d" (reg1) : : "cc"); |
| 333 | if (ccode == 0) |
| 334 | iucv_max_pathid = reg0; |
| 335 | kfree(param); |
| 336 | return ccode ? -EPERM : 0; |
| 337 | } |
| 338 | |
| 339 | /** |
| 340 | * iucv_allow_cpu |
| 341 | * @data: unused |
| 342 | * |
| 343 | * Allow iucv interrupts on this cpu. |
| 344 | */ |
| 345 | static void iucv_allow_cpu(void *data) |
| 346 | { |
| 347 | int cpu = smp_processor_id(); |
| 348 | union iucv_param *parm; |
| 349 | |
| 350 | /* |
| 351 | * Enable all iucv interrupts. |
| 352 | * ipmask contains bits for the different interrupts |
| 353 | * 0x80 - Flag to allow nonpriority message pending interrupts |
| 354 | * 0x40 - Flag to allow priority message pending interrupts |
| 355 | * 0x20 - Flag to allow nonpriority message completion interrupts |
| 356 | * 0x10 - Flag to allow priority message completion interrupts |
| 357 | * 0x08 - Flag to allow IUCV control interrupts |
| 358 | */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 359 | parm = iucv_param[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 360 | memset(parm, 0, sizeof(union iucv_param)); |
| 361 | parm->set_mask.ipmask = 0xf8; |
| 362 | iucv_call_b2f0(IUCV_SETMASK, parm); |
| 363 | |
| 364 | /* Set indication that iucv interrupts are allowed for this cpu. */ |
| 365 | cpu_set(cpu, iucv_irq_cpumask); |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * iucv_block_cpu |
| 370 | * @data: unused |
| 371 | * |
| 372 | * Block iucv interrupts on this cpu. |
| 373 | */ |
| 374 | static void iucv_block_cpu(void *data) |
| 375 | { |
| 376 | int cpu = smp_processor_id(); |
| 377 | union iucv_param *parm; |
| 378 | |
| 379 | /* Disable all iucv interrupts. */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 380 | parm = iucv_param[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 381 | memset(parm, 0, sizeof(union iucv_param)); |
| 382 | iucv_call_b2f0(IUCV_SETMASK, parm); |
| 383 | |
| 384 | /* Clear indication that iucv interrupts are allowed for this cpu. */ |
| 385 | cpu_clear(cpu, iucv_irq_cpumask); |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * iucv_declare_cpu |
| 390 | * @data: unused |
| 391 | * |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 392 | * Declare a interrupt buffer on this cpu. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 393 | */ |
| 394 | static void iucv_declare_cpu(void *data) |
| 395 | { |
| 396 | int cpu = smp_processor_id(); |
| 397 | union iucv_param *parm; |
| 398 | int rc; |
| 399 | |
| 400 | if (cpu_isset(cpu, iucv_buffer_cpumask)) |
| 401 | return; |
| 402 | |
| 403 | /* Declare interrupt buffer. */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 404 | parm = iucv_param[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 405 | memset(parm, 0, sizeof(union iucv_param)); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 406 | parm->db.ipbfadr1 = virt_to_phys(iucv_irq_data[cpu]); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 407 | rc = iucv_call_b2f0(IUCV_DECLARE_BUFFER, parm); |
| 408 | if (rc) { |
| 409 | char *err = "Unknown"; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 410 | switch (rc) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 411 | case 0x03: |
| 412 | err = "Directory error"; |
| 413 | break; |
| 414 | case 0x0a: |
| 415 | err = "Invalid length"; |
| 416 | break; |
| 417 | case 0x13: |
| 418 | err = "Buffer already exists"; |
| 419 | break; |
| 420 | case 0x3e: |
| 421 | err = "Buffer overlap"; |
| 422 | break; |
| 423 | case 0x5c: |
| 424 | err = "Paging or storage error"; |
| 425 | break; |
| 426 | } |
| 427 | printk(KERN_WARNING "iucv_register: iucv_declare_buffer " |
| 428 | "on cpu %i returned error 0x%02x (%s)\n", cpu, rc, err); |
| 429 | return; |
| 430 | } |
| 431 | |
| 432 | /* Set indication that an iucv buffer exists for this cpu. */ |
| 433 | cpu_set(cpu, iucv_buffer_cpumask); |
| 434 | |
| 435 | if (iucv_nonsmp_handler == 0 || cpus_empty(iucv_irq_cpumask)) |
| 436 | /* Enable iucv interrupts on this cpu. */ |
| 437 | iucv_allow_cpu(NULL); |
| 438 | else |
| 439 | /* Disable iucv interrupts on this cpu. */ |
| 440 | iucv_block_cpu(NULL); |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * iucv_retrieve_cpu |
| 445 | * @data: unused |
| 446 | * |
| 447 | * Retrieve interrupt buffer on this cpu. |
| 448 | */ |
| 449 | static void iucv_retrieve_cpu(void *data) |
| 450 | { |
| 451 | int cpu = smp_processor_id(); |
| 452 | union iucv_param *parm; |
| 453 | |
| 454 | if (!cpu_isset(cpu, iucv_buffer_cpumask)) |
| 455 | return; |
| 456 | |
| 457 | /* Block iucv interrupts. */ |
| 458 | iucv_block_cpu(NULL); |
| 459 | |
| 460 | /* Retrieve interrupt buffer. */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 461 | parm = iucv_param[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 462 | iucv_call_b2f0(IUCV_RETRIEVE_BUFFER, parm); |
| 463 | |
| 464 | /* Clear indication that an iucv buffer exists for this cpu. */ |
| 465 | cpu_clear(cpu, iucv_buffer_cpumask); |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * iucv_setmask_smp |
| 470 | * |
| 471 | * Allow iucv interrupts on all cpus. |
| 472 | */ |
| 473 | static void iucv_setmask_mp(void) |
| 474 | { |
| 475 | int cpu; |
| 476 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 477 | preempt_disable(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 478 | for_each_online_cpu(cpu) |
| 479 | /* Enable all cpus with a declared buffer. */ |
| 480 | if (cpu_isset(cpu, iucv_buffer_cpumask) && |
| 481 | !cpu_isset(cpu, iucv_irq_cpumask)) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 482 | smp_call_function_single(cpu, iucv_allow_cpu, |
| 483 | NULL, 0, 1); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 484 | preempt_enable(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /** |
| 488 | * iucv_setmask_up |
| 489 | * |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 490 | * Allow iucv interrupts on a single cpu. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 491 | */ |
| 492 | static void iucv_setmask_up(void) |
| 493 | { |
| 494 | cpumask_t cpumask; |
| 495 | int cpu; |
| 496 | |
| 497 | /* Disable all cpu but the first in cpu_irq_cpumask. */ |
| 498 | cpumask = iucv_irq_cpumask; |
| 499 | cpu_clear(first_cpu(iucv_irq_cpumask), cpumask); |
| 500 | for_each_cpu_mask(cpu, cpumask) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 501 | smp_call_function_single(cpu, iucv_block_cpu, NULL, 0, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | /** |
| 505 | * iucv_enable |
| 506 | * |
| 507 | * This function makes iucv ready for use. It allocates the pathid |
| 508 | * table, declares an iucv interrupt buffer and enables the iucv |
| 509 | * interrupts. Called when the first user has registered an iucv |
| 510 | * handler. |
| 511 | */ |
| 512 | static int iucv_enable(void) |
| 513 | { |
| 514 | size_t alloc_size; |
| 515 | int cpu, rc; |
| 516 | |
| 517 | rc = -ENOMEM; |
| 518 | alloc_size = iucv_max_pathid * sizeof(struct iucv_path); |
| 519 | iucv_path_table = kzalloc(alloc_size, GFP_KERNEL); |
| 520 | if (!iucv_path_table) |
| 521 | goto out; |
| 522 | /* Declare per cpu buffers. */ |
| 523 | rc = -EIO; |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 524 | preempt_disable(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 525 | for_each_online_cpu(cpu) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 526 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 527 | preempt_enable(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 528 | if (cpus_empty(iucv_buffer_cpumask)) |
| 529 | /* No cpu could declare an iucv buffer. */ |
| 530 | goto out_path; |
| 531 | return 0; |
| 532 | |
| 533 | out_path: |
| 534 | kfree(iucv_path_table); |
| 535 | out: |
| 536 | return rc; |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * iucv_disable |
| 541 | * |
| 542 | * This function shuts down iucv. It disables iucv interrupts, retrieves |
| 543 | * the iucv interrupt buffer and frees the pathid table. Called after the |
| 544 | * last user unregister its iucv handler. |
| 545 | */ |
| 546 | static void iucv_disable(void) |
| 547 | { |
| 548 | on_each_cpu(iucv_retrieve_cpu, NULL, 0, 1); |
| 549 | kfree(iucv_path_table); |
| 550 | } |
| 551 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 552 | static int __cpuinit iucv_cpu_notify(struct notifier_block *self, |
| 553 | unsigned long action, void *hcpu) |
| 554 | { |
| 555 | cpumask_t cpumask; |
| 556 | long cpu = (long) hcpu; |
| 557 | |
| 558 | switch (action) { |
| 559 | case CPU_UP_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 560 | case CPU_UP_PREPARE_FROZEN: |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 561 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), |
| 562 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); |
| 563 | if (!iucv_irq_data[cpu]) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 564 | return NOTIFY_BAD; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 565 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), |
| 566 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); |
| 567 | if (!iucv_param[cpu]) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 568 | return NOTIFY_BAD; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 569 | break; |
| 570 | case CPU_UP_CANCELED: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 571 | case CPU_UP_CANCELED_FROZEN: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 572 | case CPU_DEAD: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 573 | case CPU_DEAD_FROZEN: |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 574 | kfree(iucv_param[cpu]); |
| 575 | iucv_param[cpu] = NULL; |
| 576 | kfree(iucv_irq_data[cpu]); |
| 577 | iucv_irq_data[cpu] = NULL; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 578 | break; |
| 579 | case CPU_ONLINE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 580 | case CPU_ONLINE_FROZEN: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 581 | case CPU_DOWN_FAILED: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 582 | case CPU_DOWN_FAILED_FROZEN: |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 583 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 584 | break; |
| 585 | case CPU_DOWN_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 586 | case CPU_DOWN_PREPARE_FROZEN: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 587 | cpumask = iucv_buffer_cpumask; |
| 588 | cpu_clear(cpu, cpumask); |
| 589 | if (cpus_empty(cpumask)) |
| 590 | /* Can't offline last IUCV enabled cpu. */ |
| 591 | return NOTIFY_BAD; |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 592 | smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 0, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 593 | if (cpus_empty(iucv_irq_cpumask)) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 594 | smp_call_function_single(first_cpu(iucv_buffer_cpumask), |
| 595 | iucv_allow_cpu, NULL, 0, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 596 | break; |
| 597 | } |
| 598 | return NOTIFY_OK; |
| 599 | } |
| 600 | |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 601 | static struct notifier_block __cpuinitdata iucv_cpu_notifier = { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 602 | .notifier_call = iucv_cpu_notify, |
| 603 | }; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 604 | |
| 605 | /** |
| 606 | * iucv_sever_pathid |
| 607 | * @pathid: path identification number. |
| 608 | * @userdata: 16-bytes of user data. |
| 609 | * |
| 610 | * Sever an iucv path to free up the pathid. Used internally. |
| 611 | */ |
| 612 | static int iucv_sever_pathid(u16 pathid, u8 userdata[16]) |
| 613 | { |
| 614 | union iucv_param *parm; |
| 615 | |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 616 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 617 | memset(parm, 0, sizeof(union iucv_param)); |
| 618 | if (userdata) |
| 619 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); |
| 620 | parm->ctrl.ippathid = pathid; |
| 621 | return iucv_call_b2f0(IUCV_SEVER, parm); |
| 622 | } |
| 623 | |
| 624 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 625 | * __iucv_cleanup_queue |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 626 | * @dummy: unused dummy argument |
| 627 | * |
| 628 | * Nop function called via smp_call_function to force work items from |
| 629 | * pending external iucv interrupts to the work queue. |
| 630 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 631 | static void __iucv_cleanup_queue(void *dummy) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 632 | { |
| 633 | } |
| 634 | |
| 635 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 636 | * iucv_cleanup_queue |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 637 | * |
| 638 | * Function called after a path has been severed to find all remaining |
| 639 | * work items for the now stale pathid. The caller needs to hold the |
| 640 | * iucv_table_lock. |
| 641 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 642 | static void iucv_cleanup_queue(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 643 | { |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 644 | struct iucv_irq_list *p, *n; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 645 | |
| 646 | /* |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 647 | * When a path is severed, the pathid can be reused immediatly |
| 648 | * on a iucv connect or a connection pending interrupt. Remove |
| 649 | * all entries from the task queue that refer to a stale pathid |
| 650 | * (iucv_path_table[ix] == NULL). Only then do the iucv connect |
| 651 | * or deliver the connection pending interrupt. To get all the |
| 652 | * pending interrupts force them to the work queue by calling |
| 653 | * an empty function on all cpus. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 654 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 655 | smp_call_function(__iucv_cleanup_queue, NULL, 0, 1); |
| 656 | spin_lock_irq(&iucv_queue_lock); |
| 657 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) { |
| 658 | /* Remove stale work items from the task queue. */ |
| 659 | if (iucv_path_table[p->data.ippathid] == NULL) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 660 | list_del(&p->list); |
| 661 | kfree(p); |
| 662 | } |
| 663 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 664 | spin_unlock_irq(&iucv_queue_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | /** |
| 668 | * iucv_register: |
| 669 | * @handler: address of iucv handler structure |
| 670 | * @smp: != 0 indicates that the handler can deal with out of order messages |
| 671 | * |
| 672 | * Registers a driver with IUCV. |
| 673 | * |
| 674 | * Returns 0 on success, -ENOMEM if the memory allocation for the pathid |
| 675 | * table failed, or -EIO if IUCV_DECLARE_BUFFER failed on all cpus. |
| 676 | */ |
| 677 | int iucv_register(struct iucv_handler *handler, int smp) |
| 678 | { |
| 679 | int rc; |
| 680 | |
| 681 | if (!iucv_available) |
| 682 | return -ENOSYS; |
| 683 | mutex_lock(&iucv_register_mutex); |
| 684 | if (!smp) |
| 685 | iucv_nonsmp_handler++; |
| 686 | if (list_empty(&iucv_handler_list)) { |
| 687 | rc = iucv_enable(); |
| 688 | if (rc) |
| 689 | goto out_mutex; |
| 690 | } else if (!smp && iucv_nonsmp_handler == 1) |
| 691 | iucv_setmask_up(); |
| 692 | INIT_LIST_HEAD(&handler->paths); |
| 693 | |
Ursula Braun | 435bc9d | 2008-02-07 18:06:52 -0800 | [diff] [blame] | 694 | spin_lock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 695 | list_add_tail(&handler->list, &iucv_handler_list); |
Ursula Braun | 435bc9d | 2008-02-07 18:06:52 -0800 | [diff] [blame] | 696 | spin_unlock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 697 | rc = 0; |
| 698 | out_mutex: |
| 699 | mutex_unlock(&iucv_register_mutex); |
| 700 | return rc; |
| 701 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 702 | EXPORT_SYMBOL(iucv_register); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 703 | |
| 704 | /** |
| 705 | * iucv_unregister |
| 706 | * @handler: address of iucv handler structure |
| 707 | * @smp: != 0 indicates that the handler can deal with out of order messages |
| 708 | * |
| 709 | * Unregister driver from IUCV. |
| 710 | */ |
| 711 | void iucv_unregister(struct iucv_handler *handler, int smp) |
| 712 | { |
| 713 | struct iucv_path *p, *n; |
| 714 | |
| 715 | mutex_lock(&iucv_register_mutex); |
| 716 | spin_lock_bh(&iucv_table_lock); |
| 717 | /* Remove handler from the iucv_handler_list. */ |
| 718 | list_del_init(&handler->list); |
| 719 | /* Sever all pathids still refering to the handler. */ |
| 720 | list_for_each_entry_safe(p, n, &handler->paths, list) { |
| 721 | iucv_sever_pathid(p->pathid, NULL); |
| 722 | iucv_path_table[p->pathid] = NULL; |
| 723 | list_del(&p->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 724 | iucv_path_free(p); |
| 725 | } |
| 726 | spin_unlock_bh(&iucv_table_lock); |
| 727 | if (!smp) |
| 728 | iucv_nonsmp_handler--; |
| 729 | if (list_empty(&iucv_handler_list)) |
| 730 | iucv_disable(); |
| 731 | else if (!smp && iucv_nonsmp_handler == 0) |
| 732 | iucv_setmask_mp(); |
| 733 | mutex_unlock(&iucv_register_mutex); |
| 734 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 735 | EXPORT_SYMBOL(iucv_unregister); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 736 | |
| 737 | /** |
| 738 | * iucv_path_accept |
| 739 | * @path: address of iucv path structure |
| 740 | * @handler: address of iucv handler structure |
| 741 | * @userdata: 16 bytes of data reflected to the communication partner |
| 742 | * @private: private data passed to interrupt handlers for this path |
| 743 | * |
| 744 | * This function is issued after the user received a connection pending |
| 745 | * external interrupt and now wishes to complete the IUCV communication path. |
| 746 | * |
| 747 | * Returns the result of the CP IUCV call. |
| 748 | */ |
| 749 | int iucv_path_accept(struct iucv_path *path, struct iucv_handler *handler, |
| 750 | u8 userdata[16], void *private) |
| 751 | { |
| 752 | union iucv_param *parm; |
| 753 | int rc; |
| 754 | |
| 755 | local_bh_disable(); |
| 756 | /* Prepare parameter block. */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 757 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 758 | memset(parm, 0, sizeof(union iucv_param)); |
| 759 | parm->ctrl.ippathid = path->pathid; |
| 760 | parm->ctrl.ipmsglim = path->msglim; |
| 761 | if (userdata) |
| 762 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); |
| 763 | parm->ctrl.ipflags1 = path->flags; |
| 764 | |
| 765 | rc = iucv_call_b2f0(IUCV_ACCEPT, parm); |
| 766 | if (!rc) { |
| 767 | path->private = private; |
| 768 | path->msglim = parm->ctrl.ipmsglim; |
| 769 | path->flags = parm->ctrl.ipflags1; |
| 770 | } |
| 771 | local_bh_enable(); |
| 772 | return rc; |
| 773 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 774 | EXPORT_SYMBOL(iucv_path_accept); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 775 | |
| 776 | /** |
| 777 | * iucv_path_connect |
| 778 | * @path: address of iucv path structure |
| 779 | * @handler: address of iucv handler structure |
| 780 | * @userid: 8-byte user identification |
| 781 | * @system: 8-byte target system identification |
| 782 | * @userdata: 16 bytes of data reflected to the communication partner |
| 783 | * @private: private data passed to interrupt handlers for this path |
| 784 | * |
| 785 | * This function establishes an IUCV path. Although the connect may complete |
| 786 | * successfully, you are not able to use the path until you receive an IUCV |
| 787 | * Connection Complete external interrupt. |
| 788 | * |
| 789 | * Returns the result of the CP IUCV call. |
| 790 | */ |
| 791 | int iucv_path_connect(struct iucv_path *path, struct iucv_handler *handler, |
| 792 | u8 userid[8], u8 system[8], u8 userdata[16], |
| 793 | void *private) |
| 794 | { |
| 795 | union iucv_param *parm; |
| 796 | int rc; |
| 797 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 798 | spin_lock_bh(&iucv_table_lock); |
| 799 | iucv_cleanup_queue(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 800 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 801 | memset(parm, 0, sizeof(union iucv_param)); |
| 802 | parm->ctrl.ipmsglim = path->msglim; |
| 803 | parm->ctrl.ipflags1 = path->flags; |
| 804 | if (userid) { |
| 805 | memcpy(parm->ctrl.ipvmid, userid, sizeof(parm->ctrl.ipvmid)); |
| 806 | ASCEBC(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); |
| 807 | EBC_TOUPPER(parm->ctrl.ipvmid, sizeof(parm->ctrl.ipvmid)); |
| 808 | } |
| 809 | if (system) { |
| 810 | memcpy(parm->ctrl.iptarget, system, |
| 811 | sizeof(parm->ctrl.iptarget)); |
| 812 | ASCEBC(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); |
| 813 | EBC_TOUPPER(parm->ctrl.iptarget, sizeof(parm->ctrl.iptarget)); |
| 814 | } |
| 815 | if (userdata) |
| 816 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); |
| 817 | |
| 818 | rc = iucv_call_b2f0(IUCV_CONNECT, parm); |
| 819 | if (!rc) { |
| 820 | if (parm->ctrl.ippathid < iucv_max_pathid) { |
| 821 | path->pathid = parm->ctrl.ippathid; |
| 822 | path->msglim = parm->ctrl.ipmsglim; |
| 823 | path->flags = parm->ctrl.ipflags1; |
| 824 | path->handler = handler; |
| 825 | path->private = private; |
| 826 | list_add_tail(&path->list, &handler->paths); |
| 827 | iucv_path_table[path->pathid] = path; |
| 828 | } else { |
| 829 | iucv_sever_pathid(parm->ctrl.ippathid, |
| 830 | iucv_error_pathid); |
| 831 | rc = -EIO; |
| 832 | } |
| 833 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 834 | spin_unlock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 835 | return rc; |
| 836 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 837 | EXPORT_SYMBOL(iucv_path_connect); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 838 | |
| 839 | /** |
| 840 | * iucv_path_quiesce: |
| 841 | * @path: address of iucv path structure |
| 842 | * @userdata: 16 bytes of data reflected to the communication partner |
| 843 | * |
| 844 | * This function temporarily suspends incoming messages on an IUCV path. |
| 845 | * You can later reactivate the path by invoking the iucv_resume function. |
| 846 | * |
| 847 | * Returns the result from the CP IUCV call. |
| 848 | */ |
| 849 | int iucv_path_quiesce(struct iucv_path *path, u8 userdata[16]) |
| 850 | { |
| 851 | union iucv_param *parm; |
| 852 | int rc; |
| 853 | |
| 854 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 855 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 856 | memset(parm, 0, sizeof(union iucv_param)); |
| 857 | if (userdata) |
| 858 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); |
| 859 | parm->ctrl.ippathid = path->pathid; |
| 860 | rc = iucv_call_b2f0(IUCV_QUIESCE, parm); |
| 861 | local_bh_enable(); |
| 862 | return rc; |
| 863 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 864 | EXPORT_SYMBOL(iucv_path_quiesce); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 865 | |
| 866 | /** |
| 867 | * iucv_path_resume: |
| 868 | * @path: address of iucv path structure |
| 869 | * @userdata: 16 bytes of data reflected to the communication partner |
| 870 | * |
| 871 | * This function resumes incoming messages on an IUCV path that has |
| 872 | * been stopped with iucv_path_quiesce. |
| 873 | * |
| 874 | * Returns the result from the CP IUCV call. |
| 875 | */ |
| 876 | int iucv_path_resume(struct iucv_path *path, u8 userdata[16]) |
| 877 | { |
| 878 | union iucv_param *parm; |
| 879 | int rc; |
| 880 | |
| 881 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 882 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 883 | memset(parm, 0, sizeof(union iucv_param)); |
| 884 | if (userdata) |
| 885 | memcpy(parm->ctrl.ipuser, userdata, sizeof(parm->ctrl.ipuser)); |
| 886 | parm->ctrl.ippathid = path->pathid; |
| 887 | rc = iucv_call_b2f0(IUCV_RESUME, parm); |
| 888 | local_bh_enable(); |
| 889 | return rc; |
| 890 | } |
| 891 | |
| 892 | /** |
| 893 | * iucv_path_sever |
| 894 | * @path: address of iucv path structure |
| 895 | * @userdata: 16 bytes of data reflected to the communication partner |
| 896 | * |
| 897 | * This function terminates an IUCV path. |
| 898 | * |
| 899 | * Returns the result from the CP IUCV call. |
| 900 | */ |
| 901 | int iucv_path_sever(struct iucv_path *path, u8 userdata[16]) |
| 902 | { |
| 903 | int rc; |
| 904 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 905 | preempt_disable(); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 906 | if (iucv_active_cpu != smp_processor_id()) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 907 | spin_lock_bh(&iucv_table_lock); |
| 908 | rc = iucv_sever_pathid(path->pathid, userdata); |
| 909 | if (!rc) { |
| 910 | iucv_path_table[path->pathid] = NULL; |
| 911 | list_del_init(&path->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 912 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 913 | if (iucv_active_cpu != smp_processor_id()) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 914 | spin_unlock_bh(&iucv_table_lock); |
| 915 | preempt_enable(); |
| 916 | return rc; |
| 917 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 918 | EXPORT_SYMBOL(iucv_path_sever); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 919 | |
| 920 | /** |
| 921 | * iucv_message_purge |
| 922 | * @path: address of iucv path structure |
| 923 | * @msg: address of iucv msg structure |
| 924 | * @srccls: source class of message |
| 925 | * |
| 926 | * Cancels a message you have sent. |
| 927 | * |
| 928 | * Returns the result from the CP IUCV call. |
| 929 | */ |
| 930 | int iucv_message_purge(struct iucv_path *path, struct iucv_message *msg, |
| 931 | u32 srccls) |
| 932 | { |
| 933 | union iucv_param *parm; |
| 934 | int rc; |
| 935 | |
| 936 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 937 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 938 | memset(parm, 0, sizeof(union iucv_param)); |
| 939 | parm->purge.ippathid = path->pathid; |
| 940 | parm->purge.ipmsgid = msg->id; |
| 941 | parm->purge.ipsrccls = srccls; |
| 942 | parm->purge.ipflags1 = IUCV_IPSRCCLS | IUCV_IPFGMID | IUCV_IPFGPID; |
| 943 | rc = iucv_call_b2f0(IUCV_PURGE, parm); |
| 944 | if (!rc) { |
| 945 | msg->audit = (*(u32 *) &parm->purge.ipaudit) >> 8; |
| 946 | msg->tag = parm->purge.ipmsgtag; |
| 947 | } |
| 948 | local_bh_enable(); |
| 949 | return rc; |
| 950 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 951 | EXPORT_SYMBOL(iucv_message_purge); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 952 | |
| 953 | /** |
| 954 | * iucv_message_receive |
| 955 | * @path: address of iucv path structure |
| 956 | * @msg: address of iucv msg structure |
| 957 | * @flags: how the message is received (IUCV_IPBUFLST) |
| 958 | * @buffer: address of data buffer or address of struct iucv_array |
| 959 | * @size: length of data buffer |
| 960 | * @residual: |
| 961 | * |
| 962 | * This function receives messages that are being sent to you over |
| 963 | * established paths. This function will deal with RMDATA messages |
| 964 | * embedded in struct iucv_message as well. |
| 965 | * |
| 966 | * Returns the result from the CP IUCV call. |
| 967 | */ |
| 968 | int iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, |
| 969 | u8 flags, void *buffer, size_t size, size_t *residual) |
| 970 | { |
| 971 | union iucv_param *parm; |
| 972 | struct iucv_array *array; |
| 973 | u8 *rmmsg; |
| 974 | size_t copy; |
| 975 | int rc; |
| 976 | |
| 977 | if (msg->flags & IUCV_IPRMDATA) { |
| 978 | /* |
| 979 | * Message is 8 bytes long and has been stored to the |
| 980 | * message descriptor itself. |
| 981 | */ |
| 982 | rc = (size < 8) ? 5 : 0; |
| 983 | if (residual) |
| 984 | *residual = abs(size - 8); |
| 985 | rmmsg = msg->rmmsg; |
| 986 | if (flags & IUCV_IPBUFLST) { |
| 987 | /* Copy to struct iucv_array. */ |
| 988 | size = (size < 8) ? size : 8; |
| 989 | for (array = buffer; size > 0; array++) { |
| 990 | copy = min_t(size_t, size, array->length); |
| 991 | memcpy((u8 *)(addr_t) array->address, |
| 992 | rmmsg, copy); |
| 993 | rmmsg += copy; |
| 994 | size -= copy; |
| 995 | } |
| 996 | } else { |
| 997 | /* Copy to direct buffer. */ |
| 998 | memcpy(buffer, rmmsg, min_t(size_t, size, 8)); |
| 999 | } |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
| 1003 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1004 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1005 | memset(parm, 0, sizeof(union iucv_param)); |
| 1006 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; |
| 1007 | parm->db.ipbfln1f = (u32) size; |
| 1008 | parm->db.ipmsgid = msg->id; |
| 1009 | parm->db.ippathid = path->pathid; |
| 1010 | parm->db.iptrgcls = msg->class; |
| 1011 | parm->db.ipflags1 = (flags | IUCV_IPFGPID | |
| 1012 | IUCV_IPFGMID | IUCV_IPTRGCLS); |
| 1013 | rc = iucv_call_b2f0(IUCV_RECEIVE, parm); |
| 1014 | if (!rc || rc == 5) { |
| 1015 | msg->flags = parm->db.ipflags1; |
| 1016 | if (residual) |
| 1017 | *residual = parm->db.ipbfln1f; |
| 1018 | } |
| 1019 | local_bh_enable(); |
| 1020 | return rc; |
| 1021 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1022 | EXPORT_SYMBOL(iucv_message_receive); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1023 | |
| 1024 | /** |
| 1025 | * iucv_message_reject |
| 1026 | * @path: address of iucv path structure |
| 1027 | * @msg: address of iucv msg structure |
| 1028 | * |
| 1029 | * The reject function refuses a specified message. Between the time you |
| 1030 | * are notified of a message and the time that you complete the message, |
| 1031 | * the message may be rejected. |
| 1032 | * |
| 1033 | * Returns the result from the CP IUCV call. |
| 1034 | */ |
| 1035 | int iucv_message_reject(struct iucv_path *path, struct iucv_message *msg) |
| 1036 | { |
| 1037 | union iucv_param *parm; |
| 1038 | int rc; |
| 1039 | |
| 1040 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1041 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1042 | memset(parm, 0, sizeof(union iucv_param)); |
| 1043 | parm->db.ippathid = path->pathid; |
| 1044 | parm->db.ipmsgid = msg->id; |
| 1045 | parm->db.iptrgcls = msg->class; |
| 1046 | parm->db.ipflags1 = (IUCV_IPTRGCLS | IUCV_IPFGMID | IUCV_IPFGPID); |
| 1047 | rc = iucv_call_b2f0(IUCV_REJECT, parm); |
| 1048 | local_bh_enable(); |
| 1049 | return rc; |
| 1050 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1051 | EXPORT_SYMBOL(iucv_message_reject); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1052 | |
| 1053 | /** |
| 1054 | * iucv_message_reply |
| 1055 | * @path: address of iucv path structure |
| 1056 | * @msg: address of iucv msg structure |
| 1057 | * @flags: how the reply is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) |
| 1058 | * @reply: address of reply data buffer or address of struct iucv_array |
| 1059 | * @size: length of reply data buffer |
| 1060 | * |
| 1061 | * This function responds to the two-way messages that you receive. You |
| 1062 | * must identify completely the message to which you wish to reply. ie, |
| 1063 | * pathid, msgid, and trgcls. Prmmsg signifies the data is moved into |
| 1064 | * the parameter list. |
| 1065 | * |
| 1066 | * Returns the result from the CP IUCV call. |
| 1067 | */ |
| 1068 | int iucv_message_reply(struct iucv_path *path, struct iucv_message *msg, |
| 1069 | u8 flags, void *reply, size_t size) |
| 1070 | { |
| 1071 | union iucv_param *parm; |
| 1072 | int rc; |
| 1073 | |
| 1074 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1075 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1076 | memset(parm, 0, sizeof(union iucv_param)); |
| 1077 | if (flags & IUCV_IPRMDATA) { |
| 1078 | parm->dpl.ippathid = path->pathid; |
| 1079 | parm->dpl.ipflags1 = flags; |
| 1080 | parm->dpl.ipmsgid = msg->id; |
| 1081 | parm->dpl.iptrgcls = msg->class; |
| 1082 | memcpy(parm->dpl.iprmmsg, reply, min_t(size_t, size, 8)); |
| 1083 | } else { |
| 1084 | parm->db.ipbfadr1 = (u32)(addr_t) reply; |
| 1085 | parm->db.ipbfln1f = (u32) size; |
| 1086 | parm->db.ippathid = path->pathid; |
| 1087 | parm->db.ipflags1 = flags; |
| 1088 | parm->db.ipmsgid = msg->id; |
| 1089 | parm->db.iptrgcls = msg->class; |
| 1090 | } |
| 1091 | rc = iucv_call_b2f0(IUCV_REPLY, parm); |
| 1092 | local_bh_enable(); |
| 1093 | return rc; |
| 1094 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1095 | EXPORT_SYMBOL(iucv_message_reply); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1096 | |
| 1097 | /** |
| 1098 | * iucv_message_send |
| 1099 | * @path: address of iucv path structure |
| 1100 | * @msg: address of iucv msg structure |
| 1101 | * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) |
| 1102 | * @srccls: source class of message |
| 1103 | * @buffer: address of send buffer or address of struct iucv_array |
| 1104 | * @size: length of send buffer |
| 1105 | * |
| 1106 | * This function transmits data to another application. Data to be |
| 1107 | * transmitted is in a buffer and this is a one-way message and the |
| 1108 | * receiver will not reply to the message. |
| 1109 | * |
| 1110 | * Returns the result from the CP IUCV call. |
| 1111 | */ |
| 1112 | int iucv_message_send(struct iucv_path *path, struct iucv_message *msg, |
| 1113 | u8 flags, u32 srccls, void *buffer, size_t size) |
| 1114 | { |
| 1115 | union iucv_param *parm; |
| 1116 | int rc; |
| 1117 | |
| 1118 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1119 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1120 | memset(parm, 0, sizeof(union iucv_param)); |
| 1121 | if (flags & IUCV_IPRMDATA) { |
| 1122 | /* Message of 8 bytes can be placed into the parameter list. */ |
| 1123 | parm->dpl.ippathid = path->pathid; |
| 1124 | parm->dpl.ipflags1 = flags | IUCV_IPNORPY; |
| 1125 | parm->dpl.iptrgcls = msg->class; |
| 1126 | parm->dpl.ipsrccls = srccls; |
| 1127 | parm->dpl.ipmsgtag = msg->tag; |
| 1128 | memcpy(parm->dpl.iprmmsg, buffer, 8); |
| 1129 | } else { |
| 1130 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; |
| 1131 | parm->db.ipbfln1f = (u32) size; |
| 1132 | parm->db.ippathid = path->pathid; |
| 1133 | parm->db.ipflags1 = flags | IUCV_IPNORPY; |
| 1134 | parm->db.iptrgcls = msg->class; |
| 1135 | parm->db.ipsrccls = srccls; |
| 1136 | parm->db.ipmsgtag = msg->tag; |
| 1137 | } |
| 1138 | rc = iucv_call_b2f0(IUCV_SEND, parm); |
| 1139 | if (!rc) |
| 1140 | msg->id = parm->db.ipmsgid; |
| 1141 | local_bh_enable(); |
| 1142 | return rc; |
| 1143 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1144 | EXPORT_SYMBOL(iucv_message_send); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1145 | |
| 1146 | /** |
| 1147 | * iucv_message_send2way |
| 1148 | * @path: address of iucv path structure |
| 1149 | * @msg: address of iucv msg structure |
| 1150 | * @flags: how the message is sent and the reply is received |
| 1151 | * (IUCV_IPRMDATA, IUCV_IPBUFLST, IUCV_IPPRTY, IUCV_ANSLST) |
| 1152 | * @srccls: source class of message |
| 1153 | * @buffer: address of send buffer or address of struct iucv_array |
| 1154 | * @size: length of send buffer |
| 1155 | * @ansbuf: address of answer buffer or address of struct iucv_array |
| 1156 | * @asize: size of reply buffer |
| 1157 | * |
| 1158 | * This function transmits data to another application. Data to be |
| 1159 | * transmitted is in a buffer. The receiver of the send is expected to |
| 1160 | * reply to the message and a buffer is provided into which IUCV moves |
| 1161 | * the reply to this message. |
| 1162 | * |
| 1163 | * Returns the result from the CP IUCV call. |
| 1164 | */ |
| 1165 | int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg, |
| 1166 | u8 flags, u32 srccls, void *buffer, size_t size, |
| 1167 | void *answer, size_t asize, size_t *residual) |
| 1168 | { |
| 1169 | union iucv_param *parm; |
| 1170 | int rc; |
| 1171 | |
| 1172 | local_bh_disable(); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1173 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1174 | memset(parm, 0, sizeof(union iucv_param)); |
| 1175 | if (flags & IUCV_IPRMDATA) { |
| 1176 | parm->dpl.ippathid = path->pathid; |
| 1177 | parm->dpl.ipflags1 = path->flags; /* priority message */ |
| 1178 | parm->dpl.iptrgcls = msg->class; |
| 1179 | parm->dpl.ipsrccls = srccls; |
| 1180 | parm->dpl.ipmsgtag = msg->tag; |
| 1181 | parm->dpl.ipbfadr2 = (u32)(addr_t) answer; |
| 1182 | parm->dpl.ipbfln2f = (u32) asize; |
| 1183 | memcpy(parm->dpl.iprmmsg, buffer, 8); |
| 1184 | } else { |
| 1185 | parm->db.ippathid = path->pathid; |
| 1186 | parm->db.ipflags1 = path->flags; /* priority message */ |
| 1187 | parm->db.iptrgcls = msg->class; |
| 1188 | parm->db.ipsrccls = srccls; |
| 1189 | parm->db.ipmsgtag = msg->tag; |
| 1190 | parm->db.ipbfadr1 = (u32)(addr_t) buffer; |
| 1191 | parm->db.ipbfln1f = (u32) size; |
| 1192 | parm->db.ipbfadr2 = (u32)(addr_t) answer; |
| 1193 | parm->db.ipbfln2f = (u32) asize; |
| 1194 | } |
| 1195 | rc = iucv_call_b2f0(IUCV_SEND, parm); |
| 1196 | if (!rc) |
| 1197 | msg->id = parm->db.ipmsgid; |
| 1198 | local_bh_enable(); |
| 1199 | return rc; |
| 1200 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1201 | EXPORT_SYMBOL(iucv_message_send2way); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1202 | |
| 1203 | /** |
| 1204 | * iucv_path_pending |
| 1205 | * @data: Pointer to external interrupt buffer |
| 1206 | * |
| 1207 | * Process connection pending work item. Called from tasklet while holding |
| 1208 | * iucv_table_lock. |
| 1209 | */ |
| 1210 | struct iucv_path_pending { |
| 1211 | u16 ippathid; |
| 1212 | u8 ipflags1; |
| 1213 | u8 iptype; |
| 1214 | u16 ipmsglim; |
| 1215 | u16 res1; |
| 1216 | u8 ipvmid[8]; |
| 1217 | u8 ipuser[16]; |
| 1218 | u32 res3; |
| 1219 | u8 ippollfg; |
| 1220 | u8 res4[3]; |
| 1221 | } __attribute__ ((packed)); |
| 1222 | |
| 1223 | static void iucv_path_pending(struct iucv_irq_data *data) |
| 1224 | { |
| 1225 | struct iucv_path_pending *ipp = (void *) data; |
| 1226 | struct iucv_handler *handler; |
| 1227 | struct iucv_path *path; |
| 1228 | char *error; |
| 1229 | |
| 1230 | BUG_ON(iucv_path_table[ipp->ippathid]); |
| 1231 | /* New pathid, handler found. Create a new path struct. */ |
| 1232 | error = iucv_error_no_memory; |
| 1233 | path = iucv_path_alloc(ipp->ipmsglim, ipp->ipflags1, GFP_ATOMIC); |
| 1234 | if (!path) |
| 1235 | goto out_sever; |
| 1236 | path->pathid = ipp->ippathid; |
| 1237 | iucv_path_table[path->pathid] = path; |
| 1238 | EBCASC(ipp->ipvmid, 8); |
| 1239 | |
| 1240 | /* Call registered handler until one is found that wants the path. */ |
| 1241 | list_for_each_entry(handler, &iucv_handler_list, list) { |
| 1242 | if (!handler->path_pending) |
| 1243 | continue; |
| 1244 | /* |
| 1245 | * Add path to handler to allow a call to iucv_path_sever |
| 1246 | * inside the path_pending function. If the handler returns |
| 1247 | * an error remove the path from the handler again. |
| 1248 | */ |
| 1249 | list_add(&path->list, &handler->paths); |
| 1250 | path->handler = handler; |
| 1251 | if (!handler->path_pending(path, ipp->ipvmid, ipp->ipuser)) |
| 1252 | return; |
| 1253 | list_del(&path->list); |
| 1254 | path->handler = NULL; |
| 1255 | } |
| 1256 | /* No handler wanted the path. */ |
| 1257 | iucv_path_table[path->pathid] = NULL; |
| 1258 | iucv_path_free(path); |
| 1259 | error = iucv_error_no_listener; |
| 1260 | out_sever: |
| 1261 | iucv_sever_pathid(ipp->ippathid, error); |
| 1262 | } |
| 1263 | |
| 1264 | /** |
| 1265 | * iucv_path_complete |
| 1266 | * @data: Pointer to external interrupt buffer |
| 1267 | * |
| 1268 | * Process connection complete work item. Called from tasklet while holding |
| 1269 | * iucv_table_lock. |
| 1270 | */ |
| 1271 | struct iucv_path_complete { |
| 1272 | u16 ippathid; |
| 1273 | u8 ipflags1; |
| 1274 | u8 iptype; |
| 1275 | u16 ipmsglim; |
| 1276 | u16 res1; |
| 1277 | u8 res2[8]; |
| 1278 | u8 ipuser[16]; |
| 1279 | u32 res3; |
| 1280 | u8 ippollfg; |
| 1281 | u8 res4[3]; |
| 1282 | } __attribute__ ((packed)); |
| 1283 | |
| 1284 | static void iucv_path_complete(struct iucv_irq_data *data) |
| 1285 | { |
| 1286 | struct iucv_path_complete *ipc = (void *) data; |
| 1287 | struct iucv_path *path = iucv_path_table[ipc->ippathid]; |
| 1288 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1289 | if (path && path->handler && path->handler->path_complete) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1290 | path->handler->path_complete(path, ipc->ipuser); |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * iucv_path_severed |
| 1295 | * @data: Pointer to external interrupt buffer |
| 1296 | * |
| 1297 | * Process connection severed work item. Called from tasklet while holding |
| 1298 | * iucv_table_lock. |
| 1299 | */ |
| 1300 | struct iucv_path_severed { |
| 1301 | u16 ippathid; |
| 1302 | u8 res1; |
| 1303 | u8 iptype; |
| 1304 | u32 res2; |
| 1305 | u8 res3[8]; |
| 1306 | u8 ipuser[16]; |
| 1307 | u32 res4; |
| 1308 | u8 ippollfg; |
| 1309 | u8 res5[3]; |
| 1310 | } __attribute__ ((packed)); |
| 1311 | |
| 1312 | static void iucv_path_severed(struct iucv_irq_data *data) |
| 1313 | { |
| 1314 | struct iucv_path_severed *ips = (void *) data; |
| 1315 | struct iucv_path *path = iucv_path_table[ips->ippathid]; |
| 1316 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1317 | if (!path || !path->handler) /* Already severed */ |
| 1318 | return; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1319 | if (path->handler->path_severed) |
| 1320 | path->handler->path_severed(path, ips->ipuser); |
| 1321 | else { |
| 1322 | iucv_sever_pathid(path->pathid, NULL); |
| 1323 | iucv_path_table[path->pathid] = NULL; |
| 1324 | list_del_init(&path->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1325 | iucv_path_free(path); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | /** |
| 1330 | * iucv_path_quiesced |
| 1331 | * @data: Pointer to external interrupt buffer |
| 1332 | * |
| 1333 | * Process connection quiesced work item. Called from tasklet while holding |
| 1334 | * iucv_table_lock. |
| 1335 | */ |
| 1336 | struct iucv_path_quiesced { |
| 1337 | u16 ippathid; |
| 1338 | u8 res1; |
| 1339 | u8 iptype; |
| 1340 | u32 res2; |
| 1341 | u8 res3[8]; |
| 1342 | u8 ipuser[16]; |
| 1343 | u32 res4; |
| 1344 | u8 ippollfg; |
| 1345 | u8 res5[3]; |
| 1346 | } __attribute__ ((packed)); |
| 1347 | |
| 1348 | static void iucv_path_quiesced(struct iucv_irq_data *data) |
| 1349 | { |
| 1350 | struct iucv_path_quiesced *ipq = (void *) data; |
| 1351 | struct iucv_path *path = iucv_path_table[ipq->ippathid]; |
| 1352 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1353 | if (path && path->handler && path->handler->path_quiesced) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1354 | path->handler->path_quiesced(path, ipq->ipuser); |
| 1355 | } |
| 1356 | |
| 1357 | /** |
| 1358 | * iucv_path_resumed |
| 1359 | * @data: Pointer to external interrupt buffer |
| 1360 | * |
| 1361 | * Process connection resumed work item. Called from tasklet while holding |
| 1362 | * iucv_table_lock. |
| 1363 | */ |
| 1364 | struct iucv_path_resumed { |
| 1365 | u16 ippathid; |
| 1366 | u8 res1; |
| 1367 | u8 iptype; |
| 1368 | u32 res2; |
| 1369 | u8 res3[8]; |
| 1370 | u8 ipuser[16]; |
| 1371 | u32 res4; |
| 1372 | u8 ippollfg; |
| 1373 | u8 res5[3]; |
| 1374 | } __attribute__ ((packed)); |
| 1375 | |
| 1376 | static void iucv_path_resumed(struct iucv_irq_data *data) |
| 1377 | { |
| 1378 | struct iucv_path_resumed *ipr = (void *) data; |
| 1379 | struct iucv_path *path = iucv_path_table[ipr->ippathid]; |
| 1380 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1381 | if (path && path->handler && path->handler->path_resumed) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1382 | path->handler->path_resumed(path, ipr->ipuser); |
| 1383 | } |
| 1384 | |
| 1385 | /** |
| 1386 | * iucv_message_complete |
| 1387 | * @data: Pointer to external interrupt buffer |
| 1388 | * |
| 1389 | * Process message complete work item. Called from tasklet while holding |
| 1390 | * iucv_table_lock. |
| 1391 | */ |
| 1392 | struct iucv_message_complete { |
| 1393 | u16 ippathid; |
| 1394 | u8 ipflags1; |
| 1395 | u8 iptype; |
| 1396 | u32 ipmsgid; |
| 1397 | u32 ipaudit; |
| 1398 | u8 iprmmsg[8]; |
| 1399 | u32 ipsrccls; |
| 1400 | u32 ipmsgtag; |
| 1401 | u32 res; |
| 1402 | u32 ipbfln2f; |
| 1403 | u8 ippollfg; |
| 1404 | u8 res2[3]; |
| 1405 | } __attribute__ ((packed)); |
| 1406 | |
| 1407 | static void iucv_message_complete(struct iucv_irq_data *data) |
| 1408 | { |
| 1409 | struct iucv_message_complete *imc = (void *) data; |
| 1410 | struct iucv_path *path = iucv_path_table[imc->ippathid]; |
| 1411 | struct iucv_message msg; |
| 1412 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1413 | if (path && path->handler && path->handler->message_complete) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1414 | msg.flags = imc->ipflags1; |
| 1415 | msg.id = imc->ipmsgid; |
| 1416 | msg.audit = imc->ipaudit; |
| 1417 | memcpy(msg.rmmsg, imc->iprmmsg, 8); |
| 1418 | msg.class = imc->ipsrccls; |
| 1419 | msg.tag = imc->ipmsgtag; |
| 1420 | msg.length = imc->ipbfln2f; |
| 1421 | path->handler->message_complete(path, &msg); |
| 1422 | } |
| 1423 | } |
| 1424 | |
| 1425 | /** |
| 1426 | * iucv_message_pending |
| 1427 | * @data: Pointer to external interrupt buffer |
| 1428 | * |
| 1429 | * Process message pending work item. Called from tasklet while holding |
| 1430 | * iucv_table_lock. |
| 1431 | */ |
| 1432 | struct iucv_message_pending { |
| 1433 | u16 ippathid; |
| 1434 | u8 ipflags1; |
| 1435 | u8 iptype; |
| 1436 | u32 ipmsgid; |
| 1437 | u32 iptrgcls; |
| 1438 | union { |
| 1439 | u32 iprmmsg1_u32; |
| 1440 | u8 iprmmsg1[4]; |
| 1441 | } ln1msg1; |
| 1442 | union { |
| 1443 | u32 ipbfln1f; |
| 1444 | u8 iprmmsg2[4]; |
| 1445 | } ln1msg2; |
| 1446 | u32 res1[3]; |
| 1447 | u32 ipbfln2f; |
| 1448 | u8 ippollfg; |
| 1449 | u8 res2[3]; |
| 1450 | } __attribute__ ((packed)); |
| 1451 | |
| 1452 | static void iucv_message_pending(struct iucv_irq_data *data) |
| 1453 | { |
| 1454 | struct iucv_message_pending *imp = (void *) data; |
| 1455 | struct iucv_path *path = iucv_path_table[imp->ippathid]; |
| 1456 | struct iucv_message msg; |
| 1457 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1458 | if (path && path->handler && path->handler->message_pending) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1459 | msg.flags = imp->ipflags1; |
| 1460 | msg.id = imp->ipmsgid; |
| 1461 | msg.class = imp->iptrgcls; |
| 1462 | if (imp->ipflags1 & IUCV_IPRMDATA) { |
| 1463 | memcpy(msg.rmmsg, imp->ln1msg1.iprmmsg1, 8); |
| 1464 | msg.length = 8; |
| 1465 | } else |
| 1466 | msg.length = imp->ln1msg2.ipbfln1f; |
| 1467 | msg.reply_size = imp->ipbfln2f; |
| 1468 | path->handler->message_pending(path, &msg); |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1473 | * iucv_tasklet_fn: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1474 | * |
| 1475 | * This tasklet loops over the queue of irq buffers created by |
| 1476 | * iucv_external_interrupt, calls the appropriate action handler |
| 1477 | * and then frees the buffer. |
| 1478 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1479 | static void iucv_tasklet_fn(unsigned long ignored) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1480 | { |
| 1481 | typedef void iucv_irq_fn(struct iucv_irq_data *); |
| 1482 | static iucv_irq_fn *irq_fn[] = { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1483 | [0x02] = iucv_path_complete, |
| 1484 | [0x03] = iucv_path_severed, |
| 1485 | [0x04] = iucv_path_quiesced, |
| 1486 | [0x05] = iucv_path_resumed, |
| 1487 | [0x06] = iucv_message_complete, |
| 1488 | [0x07] = iucv_message_complete, |
| 1489 | [0x08] = iucv_message_pending, |
| 1490 | [0x09] = iucv_message_pending, |
| 1491 | }; |
Denis Cheng | b5e7833 | 2007-12-07 00:51:45 -0800 | [diff] [blame] | 1492 | LIST_HEAD(task_queue); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1493 | struct iucv_irq_list *p, *n; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1494 | |
| 1495 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ |
Ursula Braun | 13fdc9a | 2007-07-14 19:03:41 -0700 | [diff] [blame] | 1496 | if (!spin_trylock(&iucv_table_lock)) { |
| 1497 | tasklet_schedule(&iucv_tasklet); |
| 1498 | return; |
| 1499 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1500 | iucv_active_cpu = smp_processor_id(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1501 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1502 | spin_lock_irq(&iucv_queue_lock); |
| 1503 | list_splice_init(&iucv_task_queue, &task_queue); |
| 1504 | spin_unlock_irq(&iucv_queue_lock); |
| 1505 | |
| 1506 | list_for_each_entry_safe(p, n, &task_queue, list) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1507 | list_del_init(&p->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1508 | irq_fn[p->data.iptype](&p->data); |
| 1509 | kfree(p); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1510 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1511 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1512 | iucv_active_cpu = -1; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1513 | spin_unlock(&iucv_table_lock); |
| 1514 | } |
| 1515 | |
| 1516 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1517 | * iucv_work_fn: |
| 1518 | * |
| 1519 | * This work function loops over the queue of path pending irq blocks |
| 1520 | * created by iucv_external_interrupt, calls the appropriate action |
| 1521 | * handler and then frees the buffer. |
| 1522 | */ |
| 1523 | static void iucv_work_fn(struct work_struct *work) |
| 1524 | { |
| 1525 | typedef void iucv_irq_fn(struct iucv_irq_data *); |
Denis Cheng | b5e7833 | 2007-12-07 00:51:45 -0800 | [diff] [blame] | 1526 | LIST_HEAD(work_queue); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1527 | struct iucv_irq_list *p, *n; |
| 1528 | |
| 1529 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ |
| 1530 | spin_lock_bh(&iucv_table_lock); |
| 1531 | iucv_active_cpu = smp_processor_id(); |
| 1532 | |
| 1533 | spin_lock_irq(&iucv_queue_lock); |
| 1534 | list_splice_init(&iucv_work_queue, &work_queue); |
| 1535 | spin_unlock_irq(&iucv_queue_lock); |
| 1536 | |
| 1537 | iucv_cleanup_queue(); |
| 1538 | list_for_each_entry_safe(p, n, &work_queue, list) { |
| 1539 | list_del_init(&p->list); |
| 1540 | iucv_path_pending(&p->data); |
| 1541 | kfree(p); |
| 1542 | } |
| 1543 | |
| 1544 | iucv_active_cpu = -1; |
| 1545 | spin_unlock_bh(&iucv_table_lock); |
| 1546 | } |
| 1547 | |
| 1548 | /** |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1549 | * iucv_external_interrupt |
| 1550 | * @code: irq code |
| 1551 | * |
| 1552 | * Handles external interrupts coming in from CP. |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1553 | * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn(). |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1554 | */ |
| 1555 | static void iucv_external_interrupt(u16 code) |
| 1556 | { |
| 1557 | struct iucv_irq_data *p; |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1558 | struct iucv_irq_list *work; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1559 | |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1560 | p = iucv_irq_data[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1561 | if (p->ippathid >= iucv_max_pathid) { |
Ursula Braun | c2b4afd | 2008-07-14 09:59:29 +0200 | [diff] [blame^] | 1562 | WARN_ON(p->ippathid >= iucv_max_pathid); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1563 | iucv_sever_pathid(p->ippathid, iucv_error_no_listener); |
| 1564 | return; |
| 1565 | } |
Ursula Braun | c2b4afd | 2008-07-14 09:59:29 +0200 | [diff] [blame^] | 1566 | BUG_ON(p->iptype < 0x01 || p->iptype > 0x09); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1567 | work = kmalloc(sizeof(struct iucv_irq_list), GFP_ATOMIC); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1568 | if (!work) { |
| 1569 | printk(KERN_WARNING "iucv_external_interrupt: out of memory\n"); |
| 1570 | return; |
| 1571 | } |
| 1572 | memcpy(&work->data, p, sizeof(work->data)); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1573 | spin_lock(&iucv_queue_lock); |
| 1574 | if (p->iptype == 0x01) { |
| 1575 | /* Path pending interrupt. */ |
| 1576 | list_add_tail(&work->list, &iucv_work_queue); |
| 1577 | schedule_work(&iucv_work); |
| 1578 | } else { |
| 1579 | /* The other interrupts. */ |
| 1580 | list_add_tail(&work->list, &iucv_task_queue); |
| 1581 | tasklet_schedule(&iucv_tasklet); |
| 1582 | } |
| 1583 | spin_unlock(&iucv_queue_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | /** |
| 1587 | * iucv_init |
| 1588 | * |
| 1589 | * Allocates and initializes various data structures. |
| 1590 | */ |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1591 | static int __init iucv_init(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1592 | { |
| 1593 | int rc; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1594 | int cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1595 | |
| 1596 | if (!MACHINE_IS_VM) { |
| 1597 | rc = -EPROTONOSUPPORT; |
| 1598 | goto out; |
| 1599 | } |
| 1600 | rc = iucv_query_maxconn(); |
| 1601 | if (rc) |
| 1602 | goto out; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1603 | rc = register_external_interrupt(0x4000, iucv_external_interrupt); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1604 | if (rc) |
| 1605 | goto out; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1606 | iucv_root = s390_root_dev_register("iucv"); |
| 1607 | if (IS_ERR(iucv_root)) { |
| 1608 | rc = PTR_ERR(iucv_root); |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 1609 | goto out_int; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1610 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1611 | |
| 1612 | for_each_online_cpu(cpu) { |
| 1613 | /* Note: GFP_DMA used to get memory below 2G */ |
| 1614 | iucv_irq_data[cpu] = kmalloc_node(sizeof(struct iucv_irq_data), |
| 1615 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); |
| 1616 | if (!iucv_irq_data[cpu]) { |
| 1617 | rc = -ENOMEM; |
| 1618 | goto out_free; |
| 1619 | } |
| 1620 | |
| 1621 | /* Allocate parameter blocks. */ |
| 1622 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), |
| 1623 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); |
| 1624 | if (!iucv_param[cpu]) { |
| 1625 | rc = -ENOMEM; |
| 1626 | goto out_free; |
| 1627 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1628 | } |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 1629 | rc = register_hotcpu_notifier(&iucv_cpu_notifier); |
| 1630 | if (rc) |
| 1631 | goto out_free; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1632 | ASCEBC(iucv_error_no_listener, 16); |
| 1633 | ASCEBC(iucv_error_no_memory, 16); |
| 1634 | ASCEBC(iucv_error_pathid, 16); |
| 1635 | iucv_available = 1; |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 1636 | rc = bus_register(&iucv_bus); |
| 1637 | if (rc) |
| 1638 | goto out_cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1639 | return 0; |
| 1640 | |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 1641 | out_cpu: |
| 1642 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1643 | out_free: |
| 1644 | for_each_possible_cpu(cpu) { |
| 1645 | kfree(iucv_param[cpu]); |
| 1646 | iucv_param[cpu] = NULL; |
| 1647 | kfree(iucv_irq_data[cpu]); |
| 1648 | iucv_irq_data[cpu] = NULL; |
| 1649 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1650 | s390_root_dev_unregister(iucv_root); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1651 | out_int: |
| 1652 | unregister_external_interrupt(0x4000, iucv_external_interrupt); |
| 1653 | out: |
| 1654 | return rc; |
| 1655 | } |
| 1656 | |
| 1657 | /** |
| 1658 | * iucv_exit |
| 1659 | * |
| 1660 | * Frees everything allocated from iucv_init. |
| 1661 | */ |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1662 | static void __exit iucv_exit(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1663 | { |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1664 | struct iucv_irq_list *p, *n; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1665 | int cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1666 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1667 | spin_lock_irq(&iucv_queue_lock); |
| 1668 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) |
| 1669 | kfree(p); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1670 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) |
| 1671 | kfree(p); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1672 | spin_unlock_irq(&iucv_queue_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1673 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1674 | for_each_possible_cpu(cpu) { |
| 1675 | kfree(iucv_param[cpu]); |
| 1676 | iucv_param[cpu] = NULL; |
| 1677 | kfree(iucv_irq_data[cpu]); |
| 1678 | iucv_irq_data[cpu] = NULL; |
| 1679 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1680 | s390_root_dev_unregister(iucv_root); |
| 1681 | bus_unregister(&iucv_bus); |
| 1682 | unregister_external_interrupt(0x4000, iucv_external_interrupt); |
| 1683 | } |
| 1684 | |
| 1685 | subsys_initcall(iucv_init); |
| 1686 | module_exit(iucv_exit); |
| 1687 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1688 | MODULE_AUTHOR("(C) 2001 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); |
| 1689 | MODULE_DESCRIPTION("Linux for S/390 IUCV lowlevel driver"); |
| 1690 | MODULE_LICENSE("GPL"); |