Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * IUCV base infrastructure. |
| 3 | * |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 4 | * Copyright IBM Corp. 2001, 2009 |
| 5 | * |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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> |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 14 | * PM functions: |
| 15 | * Ursula Braun (ursula.braun@de.ibm.com) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Ursula Braun | 8f7c502 | 2008-12-25 13:39:47 +0100 | [diff] [blame] | 36 | #define KMSG_COMPONENT "iucv" |
| 37 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 38 | |
Heiko Carstens | 052ff46 | 2011-01-05 12:47:28 +0100 | [diff] [blame] | 39 | #include <linux/kernel_stat.h> |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 40 | #include <linux/module.h> |
| 41 | #include <linux/moduleparam.h> |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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> |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 52 | #include <linux/reboot.h> |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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> |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 78 | static int iucv_bus_match(struct device *dev, struct device_driver *drv) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 79 | { |
| 80 | return 0; |
| 81 | } |
| 82 | |
Ursula Braun | 4c89d86 | 2009-09-16 04:37:22 +0000 | [diff] [blame] | 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 | |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 97 | static const struct dev_pm_ops iucv_pm_ops = { |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 105 | struct bus_type iucv_bus = { |
| 106 | .name = "iucv", |
| 107 | .match = iucv_bus_match, |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 108 | .pm = &iucv_pm_ops, |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 109 | }; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 110 | EXPORT_SYMBOL(iucv_bus); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 111 | |
| 112 | struct device *iucv_root; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 113 | EXPORT_SYMBOL(iucv_root); |
| 114 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 125 | struct iucv_irq_list { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 126 | struct list_head list; |
| 127 | struct iucv_irq_data data; |
| 128 | }; |
| 129 | |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 130 | static struct iucv_irq_data *iucv_irq_data[NR_CPUS]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 131 | static cpumask_t iucv_buffer_cpumask = CPU_MASK_NONE; |
| 132 | static cpumask_t iucv_irq_cpumask = CPU_MASK_NONE; |
| 133 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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, |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 178 | IUCV_SETCONTROLMASK = 17, |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | /* |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 208 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 209 | static int iucv_active_cpu = -1; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 311 | static union iucv_param *iucv_param[NR_CPUS]; |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 312 | static union iucv_param *iucv_param_irq[NR_CPUS]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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) |
Hendrik Brueckner | b29e4da | 2009-09-16 04:37:24 +0000 | [diff] [blame] | 366 | iucv_max_pathid = reg1; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 391 | parm = iucv_param_irq[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 392 | memset(parm, 0, sizeof(union iucv_param)); |
| 393 | parm->set_mask.ipmask = 0xf8; |
| 394 | iucv_call_b2f0(IUCV_SETMASK, parm); |
| 395 | |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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. */ |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 424 | parm = iucv_param_irq[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
| 432 | /** |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 | |
| 457 | /** |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 458 | * iucv_declare_cpu |
| 459 | * @data: unused |
| 460 | * |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 461 | * Declare a interrupt buffer on this cpu. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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. */ |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 473 | parm = iucv_param_irq[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 474 | memset(parm, 0, sizeof(union iucv_param)); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 475 | parm->db.ipbfadr1 = virt_to_phys(iucv_irq_data[cpu]); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 476 | rc = iucv_call_b2f0(IUCV_DECLARE_BUFFER, parm); |
| 477 | if (rc) { |
| 478 | char *err = "Unknown"; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 479 | switch (rc) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Ursula Braun | 8f7c502 | 2008-12-25 13:39:47 +0100 | [diff] [blame] | 496 | pr_warning("Defining an interrupt buffer on CPU %i" |
| 497 | " failed with 0x%02x (%s)\n", cpu, rc, err); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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. */ |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 530 | parm = iucv_param_irq[cpu]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Heiko Carstens | 7b9d1b2 | 2008-06-09 15:50:30 -0700 | [diff] [blame] | 546 | get_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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)) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 551 | smp_call_function_single(cpu, iucv_allow_cpu, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 552 | NULL, 1); |
Heiko Carstens | 7b9d1b2 | 2008-06-09 15:50:30 -0700 | [diff] [blame] | 553 | put_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | /** |
| 557 | * iucv_setmask_up |
| 558 | * |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 559 | * Allow iucv interrupts on a single cpu. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Mike Travis | 0e12f84 | 2008-05-12 21:21:13 +0200 | [diff] [blame] | 569 | for_each_cpu_mask_nr(cpu, cpumask) |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 570 | smp_call_function_single(cpu, iucv_block_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 586 | get_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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) |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 595 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 596 | if (cpus_empty(iucv_buffer_cpumask)) |
| 597 | /* No cpu could declare an iucv buffer. */ |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 598 | goto out; |
Heiko Carstens | 7b9d1b2 | 2008-06-09 15:50:30 -0700 | [diff] [blame] | 599 | put_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 600 | return 0; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 601 | out: |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 602 | kfree(iucv_path_table); |
| 603 | iucv_path_table = NULL; |
| 604 | put_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | { |
Heiko Carstens | 8b122ef | 2008-09-30 03:03:35 -0700 | [diff] [blame] | 617 | get_online_cpus(); |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 618 | on_each_cpu(iucv_retrieve_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 619 | kfree(iucv_path_table); |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 620 | iucv_path_table = NULL; |
| 621 | put_online_cpus(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 622 | } |
| 623 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 632 | case CPU_UP_PREPARE_FROZEN: |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 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]) |
Akinobu Mita | 92e99a9 | 2010-05-26 14:43:33 -0700 | [diff] [blame] | 636 | return notifier_from_errno(-ENOMEM); |
| 637 | |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 638 | iucv_param[cpu] = kmalloc_node(sizeof(union iucv_param), |
| 639 | GFP_KERNEL|GFP_DMA, cpu_to_node(cpu)); |
Akinobu Mita | d0236f8 | 2008-07-15 02:09:53 -0700 | [diff] [blame] | 640 | if (!iucv_param[cpu]) { |
| 641 | kfree(iucv_irq_data[cpu]); |
| 642 | iucv_irq_data[cpu] = NULL; |
Akinobu Mita | 92e99a9 | 2010-05-26 14:43:33 -0700 | [diff] [blame] | 643 | return notifier_from_errno(-ENOMEM); |
Akinobu Mita | d0236f8 | 2008-07-15 02:09:53 -0700 | [diff] [blame] | 644 | } |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 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; |
Akinobu Mita | 92e99a9 | 2010-05-26 14:43:33 -0700 | [diff] [blame] | 652 | return notifier_from_errno(-ENOMEM); |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 653 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 654 | break; |
| 655 | case CPU_UP_CANCELED: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 656 | case CPU_UP_CANCELED_FROZEN: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 657 | case CPU_DEAD: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 658 | case CPU_DEAD_FROZEN: |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 659 | kfree(iucv_param_irq[cpu]); |
| 660 | iucv_param_irq[cpu] = NULL; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 661 | kfree(iucv_param[cpu]); |
| 662 | iucv_param[cpu] = NULL; |
| 663 | kfree(iucv_irq_data[cpu]); |
| 664 | iucv_irq_data[cpu] = NULL; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 665 | break; |
| 666 | case CPU_ONLINE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 667 | case CPU_ONLINE_FROZEN: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 668 | case CPU_DOWN_FAILED: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 669 | case CPU_DOWN_FAILED_FROZEN: |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 670 | if (!iucv_path_table) |
| 671 | break; |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 672 | smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 673 | break; |
| 674 | case CPU_DOWN_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 675 | case CPU_DOWN_PREPARE_FROZEN: |
Heiko Carstens | f1d3e4d | 2009-01-05 18:09:02 -0800 | [diff] [blame] | 676 | if (!iucv_path_table) |
| 677 | break; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 678 | cpumask = iucv_buffer_cpumask; |
| 679 | cpu_clear(cpu, cpumask); |
| 680 | if (cpus_empty(cpumask)) |
| 681 | /* Can't offline last IUCV enabled cpu. */ |
Akinobu Mita | 92e99a9 | 2010-05-26 14:43:33 -0700 | [diff] [blame] | 682 | return notifier_from_errno(-EINVAL); |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 683 | smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 684 | if (cpus_empty(iucv_irq_cpumask)) |
Heiko Carstens | 3bb447f | 2007-07-27 12:29:08 +0200 | [diff] [blame] | 685 | smp_call_function_single(first_cpu(iucv_buffer_cpumask), |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 686 | iucv_allow_cpu, NULL, 1); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 687 | break; |
| 688 | } |
| 689 | return NOTIFY_OK; |
| 690 | } |
| 691 | |
Heiko Carstens | f1494ed | 2008-06-09 15:49:57 -0700 | [diff] [blame] | 692 | static struct notifier_block __refdata iucv_cpu_notifier = { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 693 | .notifier_call = iucv_cpu_notify, |
| 694 | }; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 707 | parm = iucv_param_irq[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 716 | * __iucv_cleanup_queue |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 722 | static void __iucv_cleanup_queue(void *dummy) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 723 | { |
| 724 | } |
| 725 | |
| 726 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 727 | * iucv_cleanup_queue |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 733 | static void iucv_cleanup_queue(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 734 | { |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 735 | struct iucv_irq_list *p, *n; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 736 | |
| 737 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame^] | 738 | * When a path is severed, the pathid can be reused immediately |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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. |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 745 | */ |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 746 | smp_call_function(__iucv_cleanup_queue, NULL, 1); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 751 | list_del(&p->list); |
| 752 | kfree(p); |
| 753 | } |
| 754 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 755 | spin_unlock_irq(&iucv_queue_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Ursula Braun | 435bc9d | 2008-02-07 18:06:52 -0800 | [diff] [blame] | 785 | spin_lock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 786 | list_add_tail(&handler->list, &iucv_handler_list); |
Ursula Braun | 435bc9d | 2008-02-07 18:06:52 -0800 | [diff] [blame] | 787 | spin_unlock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 788 | rc = 0; |
| 789 | out_mutex: |
| 790 | mutex_unlock(&iucv_register_mutex); |
| 791 | return rc; |
| 792 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 793 | EXPORT_SYMBOL(iucv_register); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame^] | 810 | /* Sever all pathids still referring to the handler. */ |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 826 | EXPORT_SYMBOL(iucv_unregister); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 827 | |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 869 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 870 | rc = -EIO; |
| 871 | goto out; |
| 872 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 873 | /* Prepare parameter block. */ |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 874 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 888 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 889 | local_bh_enable(); |
| 890 | return rc; |
| 891 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 892 | EXPORT_SYMBOL(iucv_path_accept); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 916 | spin_lock_bh(&iucv_table_lock); |
| 917 | iucv_cleanup_queue(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 918 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 919 | rc = -EIO; |
| 920 | goto out; |
| 921 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 922 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 956 | out: |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 957 | spin_unlock_bh(&iucv_table_lock); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 958 | return rc; |
| 959 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 960 | EXPORT_SYMBOL(iucv_path_connect); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 978 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 979 | rc = -EIO; |
| 980 | goto out; |
| 981 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 982 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 988 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 989 | local_bh_enable(); |
| 990 | return rc; |
| 991 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 992 | EXPORT_SYMBOL(iucv_path_quiesce); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1010 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1011 | rc = -EIO; |
| 1012 | goto out; |
| 1013 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1014 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1020 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1038 | preempt_disable(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1039 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1040 | rc = -EIO; |
| 1041 | goto out; |
| 1042 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1043 | if (iucv_active_cpu != smp_processor_id()) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1044 | spin_lock_bh(&iucv_table_lock); |
| 1045 | rc = iucv_sever_pathid(path->pathid, userdata); |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 1046 | iucv_path_table[path->pathid] = NULL; |
| 1047 | list_del_init(&path->list); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1048 | if (iucv_active_cpu != smp_processor_id()) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1049 | spin_unlock_bh(&iucv_table_lock); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1050 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1051 | preempt_enable(); |
| 1052 | return rc; |
| 1053 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1054 | EXPORT_SYMBOL(iucv_path_sever); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1073 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1074 | rc = -EIO; |
| 1075 | goto out; |
| 1076 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1077 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1088 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1089 | local_bh_enable(); |
| 1090 | return rc; |
| 1091 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1092 | EXPORT_SYMBOL(iucv_message_purge); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1093 | |
| 1094 | /** |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 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 |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | * |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1152 | * Locking: no locking |
| 1153 | * |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1154 | * Returns the result from the CP IUCV call. |
| 1155 | */ |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1156 | int __iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, |
| 1157 | u8 flags, void *buffer, size_t size, size_t *residual) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1158 | { |
| 1159 | union iucv_param *parm; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1160 | int rc; |
| 1161 | |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1162 | if (msg->flags & IUCV_IPRMDATA) |
| 1163 | return iucv_message_receive_iprmdata(path, msg, flags, |
| 1164 | buffer, size, residual); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1165 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1166 | rc = -EIO; |
| 1167 | goto out; |
| 1168 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1169 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | } |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1184 | out: |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1216 | local_bh_enable(); |
| 1217 | return rc; |
| 1218 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1219 | EXPORT_SYMBOL(iucv_message_receive); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1238 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1239 | rc = -EIO; |
| 1240 | goto out; |
| 1241 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1242 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1249 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1250 | local_bh_enable(); |
| 1251 | return rc; |
| 1252 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1253 | EXPORT_SYMBOL(iucv_message_reject); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1277 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1278 | rc = -EIO; |
| 1279 | goto out; |
| 1280 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1281 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1298 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1299 | local_bh_enable(); |
| 1300 | return rc; |
| 1301 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1302 | EXPORT_SYMBOL(iucv_message_reply); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1303 | |
| 1304 | /** |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1305 | * __iucv_message_send |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | * |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1317 | * Locking: no locking |
| 1318 | * |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1319 | * Returns the result from the CP IUCV call. |
| 1320 | */ |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 1321 | int __iucv_message_send(struct iucv_path *path, struct iucv_message *msg, |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1322 | u8 flags, u32 srccls, void *buffer, size_t size) |
| 1323 | { |
| 1324 | union iucv_param *parm; |
| 1325 | int rc; |
| 1326 | |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1327 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1328 | rc = -EIO; |
| 1329 | goto out; |
| 1330 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1331 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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; |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1353 | out: |
Hendrik Brueckner | 91d5d45e | 2008-12-25 13:38:58 +0100 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1382 | local_bh_enable(); |
| 1383 | return rc; |
| 1384 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1385 | EXPORT_SYMBOL(iucv_message_send); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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(); |
Hendrik Brueckner | d28ecab | 2009-09-16 04:37:23 +0000 | [diff] [blame] | 1414 | if (cpus_empty(iucv_buffer_cpumask)) { |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1415 | rc = -EIO; |
| 1416 | goto out; |
| 1417 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1418 | parm = iucv_param[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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; |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 1443 | out: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1444 | local_bh_enable(); |
| 1445 | return rc; |
| 1446 | } |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1447 | EXPORT_SYMBOL(iucv_message_send2way); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1467 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1528 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Hendrik Brueckner | b8942e3 | 2009-04-21 23:26:23 +0000 | [diff] [blame] | 1535 | if (path) |
| 1536 | path->flags = ipc->ipflags1; |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1537 | if (path && path->handler && path->handler->path_complete) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1558 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1565 | if (!path || !path->handler) /* Already severed */ |
| 1566 | return; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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; |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 1572 | list_del(&path->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1594 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1601 | if (path && path->handler && path->handler->path_quiesced) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1622 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1629 | if (path && path->handler && path->handler->path_resumed) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1653 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1661 | if (path && path->handler && path->handler->message_complete) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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]; |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 1698 | } __packed; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1706 | if (path && path->handler && path->handler->message_pending) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1721 | * iucv_tasklet_fn: |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1727 | static void iucv_tasklet_fn(unsigned long ignored) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1728 | { |
| 1729 | typedef void iucv_irq_fn(struct iucv_irq_data *); |
| 1730 | static iucv_irq_fn *irq_fn[] = { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | }; |
Denis Cheng | b5e7833 | 2007-12-07 00:51:45 -0800 | [diff] [blame] | 1740 | LIST_HEAD(task_queue); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1741 | struct iucv_irq_list *p, *n; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1742 | |
| 1743 | /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */ |
Ursula Braun | 13fdc9a | 2007-07-14 19:03:41 -0700 | [diff] [blame] | 1744 | if (!spin_trylock(&iucv_table_lock)) { |
| 1745 | tasklet_schedule(&iucv_tasklet); |
| 1746 | return; |
| 1747 | } |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1748 | iucv_active_cpu = smp_processor_id(); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1749 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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) { |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1755 | list_del_init(&p->list); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1756 | irq_fn[p->data.iptype](&p->data); |
| 1757 | kfree(p); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1758 | } |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1759 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1760 | iucv_active_cpu = -1; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1761 | spin_unlock(&iucv_table_lock); |
| 1762 | } |
| 1763 | |
| 1764 | /** |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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 | { |
Denis Cheng | b5e7833 | 2007-12-07 00:51:45 -0800 | [diff] [blame] | 1773 | LIST_HEAD(work_queue); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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 | |
| 1795 | /** |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1796 | * iucv_external_interrupt |
| 1797 | * @code: irq code |
| 1798 | * |
| 1799 | * Handles external interrupts coming in from CP. |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1800 | * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn(). |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1801 | */ |
Martin Schwidefsky | f6649a7 | 2010-10-25 16:10:38 +0200 | [diff] [blame] | 1802 | static void iucv_external_interrupt(unsigned int ext_int_code, |
| 1803 | unsigned int param32, unsigned long param64) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1804 | { |
| 1805 | struct iucv_irq_data *p; |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1806 | struct iucv_irq_list *work; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1807 | |
Heiko Carstens | 052ff46 | 2011-01-05 12:47:28 +0100 | [diff] [blame] | 1808 | kstat_cpu(smp_processor_id()).irqs[EXTINT_IUC]++; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1809 | p = iucv_irq_data[smp_processor_id()]; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1810 | if (p->ippathid >= iucv_max_pathid) { |
Ursula Braun | c2b4afd | 2008-07-14 09:59:29 +0200 | [diff] [blame] | 1811 | WARN_ON(p->ippathid >= iucv_max_pathid); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1812 | iucv_sever_pathid(p->ippathid, iucv_error_no_listener); |
| 1813 | return; |
| 1814 | } |
Ursula Braun | c2b4afd | 2008-07-14 09:59:29 +0200 | [diff] [blame] | 1815 | BUG_ON(p->iptype < 0x01 || p->iptype > 0x09); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 1816 | work = kmalloc(sizeof(struct iucv_irq_list), GFP_ATOMIC); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1817 | if (!work) { |
Ursula Braun | 8f7c502 | 2008-12-25 13:39:47 +0100 | [diff] [blame] | 1818 | pr_warning("iucv_external_interrupt: out of memory\n"); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1819 | return; |
| 1820 | } |
| 1821 | memcpy(&work->data, p, sizeof(work->data)); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 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); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1833 | } |
| 1834 | |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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; |
Ursula Braun | b7c2aec | 2009-11-12 21:46:27 +0000 | [diff] [blame] | 1884 | struct iucv_irq_list *p, *n; |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 1885 | int rc = 0; |
| 1886 | |
| 1887 | #ifdef CONFIG_PM_DEBUG |
| 1888 | printk(KERN_WARNING "iucv_pm_freeze\n"); |
| 1889 | #endif |
Ursula Braun | b7c2aec | 2009-11-12 21:46:27 +0000 | [diff] [blame] | 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 | } |
Ursula Braun | 4c89d86 | 2009-09-16 04:37:22 +0000 | [diff] [blame] | 1902 | iucv_pm_state = IUCV_PM_FREEZING; |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 |
Ursula Braun | 4c89d86 | 2009-09-16 04:37:22 +0000 | [diff] [blame] | 1925 | iucv_pm_state = IUCV_PM_THAWING; |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 |
Ursula Braun | 4c89d86 | 2009-09-16 04:37:22 +0000 | [diff] [blame] | 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; |
Ursula Braun | 672e405 | 2009-06-16 10:30:42 +0200 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1976 | /** |
| 1977 | * iucv_init |
| 1978 | * |
| 1979 | * Allocates and initializes various data structures. |
| 1980 | */ |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1981 | static int __init iucv_init(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1982 | { |
| 1983 | int rc; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 1984 | int cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1985 | |
| 1986 | if (!MACHINE_IS_VM) { |
| 1987 | rc = -EPROTONOSUPPORT; |
| 1988 | goto out; |
| 1989 | } |
| 1990 | rc = iucv_query_maxconn(); |
| 1991 | if (rc) |
| 1992 | goto out; |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 1993 | rc = register_external_interrupt(0x4000, iucv_external_interrupt); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1994 | if (rc) |
| 1995 | goto out; |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 1996 | iucv_root = root_device_register("iucv"); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 1997 | if (IS_ERR(iucv_root)) { |
| 1998 | rc = PTR_ERR(iucv_root); |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 1999 | goto out_int; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2000 | } |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 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 | } |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2025 | } |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 2026 | rc = register_hotcpu_notifier(&iucv_cpu_notifier); |
| 2027 | if (rc) |
| 2028 | goto out_free; |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 2029 | rc = register_reboot_notifier(&iucv_reboot_notifier); |
| 2030 | if (rc) |
| 2031 | goto out_cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2032 | ASCEBC(iucv_error_no_listener, 16); |
| 2033 | ASCEBC(iucv_error_no_memory, 16); |
| 2034 | ASCEBC(iucv_error_pathid, 16); |
| 2035 | iucv_available = 1; |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 2036 | rc = bus_register(&iucv_bus); |
| 2037 | if (rc) |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 2038 | goto out_reboot; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2039 | return 0; |
| 2040 | |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 2041 | out_reboot: |
| 2042 | unregister_reboot_notifier(&iucv_reboot_notifier); |
Cornelia Huck | 2d7bf36 | 2008-04-10 02:12:45 -0700 | [diff] [blame] | 2043 | out_cpu: |
| 2044 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 2045 | out_free: |
| 2046 | for_each_possible_cpu(cpu) { |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 2047 | kfree(iucv_param_irq[cpu]); |
| 2048 | iucv_param_irq[cpu] = NULL; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 2049 | kfree(iucv_param[cpu]); |
| 2050 | iucv_param[cpu] = NULL; |
| 2051 | kfree(iucv_irq_data[cpu]); |
| 2052 | iucv_irq_data[cpu] = NULL; |
| 2053 | } |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 2054 | root_device_unregister(iucv_root); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | */ |
Heiko Carstens | da99f05 | 2007-05-04 12:23:27 -0700 | [diff] [blame] | 2066 | static void __exit iucv_exit(void) |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2067 | { |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 2068 | struct iucv_irq_list *p, *n; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 2069 | int cpu; |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2070 | |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 2071 | spin_lock_irq(&iucv_queue_lock); |
| 2072 | list_for_each_entry_safe(p, n, &iucv_task_queue, list) |
| 2073 | kfree(p); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2074 | list_for_each_entry_safe(p, n, &iucv_work_queue, list) |
| 2075 | kfree(p); |
Martin Schwidefsky | 04b090d | 2007-04-28 23:03:59 -0700 | [diff] [blame] | 2076 | spin_unlock_irq(&iucv_queue_lock); |
Ursula Braun | 6c00596 | 2009-06-16 10:30:41 +0200 | [diff] [blame] | 2077 | unregister_reboot_notifier(&iucv_reboot_notifier); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 2078 | unregister_hotcpu_notifier(&iucv_cpu_notifier); |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 2079 | for_each_possible_cpu(cpu) { |
Ursula Braun | 42e1b4c | 2009-04-21 23:26:20 +0000 | [diff] [blame] | 2080 | kfree(iucv_param_irq[cpu]); |
| 2081 | iucv_param_irq[cpu] = NULL; |
Christoph Lameter | 70cf5035 | 2007-11-20 11:13:38 +0100 | [diff] [blame] | 2082 | kfree(iucv_param[cpu]); |
| 2083 | iucv_param[cpu] = NULL; |
| 2084 | kfree(iucv_irq_data[cpu]); |
| 2085 | iucv_irq_data[cpu] = NULL; |
| 2086 | } |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 2087 | root_device_unregister(iucv_root); |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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 | |
Martin Schwidefsky | 2356f4c | 2007-02-08 13:37:42 -0800 | [diff] [blame] | 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"); |