Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Functions to handle I2O controllers and I2O message handling |
| 3 | * |
| 4 | * Copyright (C) 1999-2002 Red Hat Software |
| 5 | * |
| 6 | * Written by Alan Cox, Building Number Three Ltd |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | * A lot of the I2O message side code from this is taken from the |
| 14 | * Red Creek RCPCI45 adapter driver by Red Creek Communications |
| 15 | * |
| 16 | * Fixes/additions: |
| 17 | * Philipp Rumpf |
| 18 | * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI> |
| 19 | * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI> |
| 20 | * Deepak Saxena <deepak@plexity.net> |
| 21 | * Boji T Kannanthanam <boji.t.kannanthanam@intel.com> |
| 22 | * Alan Cox <alan@redhat.com>: |
| 23 | * Ported to Linux 2.5. |
| 24 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: |
| 25 | * Minor fixes for 2.6. |
| 26 | */ |
| 27 | |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/i2o.h> |
| 30 | #include <linux/delay.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 31 | #include <linux/sched.h> |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 32 | #include "core.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 34 | #define OSM_NAME "i2o" |
Markus Lidel | f6ed39a | 2006-01-06 00:19:33 -0800 | [diff] [blame] | 35 | #define OSM_VERSION "1.325" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #define OSM_DESCRIPTION "I2O subsystem" |
| 37 | |
| 38 | /* global I2O controller list */ |
| 39 | LIST_HEAD(i2o_controllers); |
| 40 | |
| 41 | /* |
| 42 | * global I2O System Table. Contains information about all the IOPs in the |
| 43 | * system. Used to inform IOPs about each others existence. |
| 44 | */ |
| 45 | static struct i2o_dma i2o_systab; |
| 46 | |
| 47 | static int i2o_hrt_get(struct i2o_controller *c); |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | * i2o_msg_get_wait - obtain an I2O message from the IOP |
| 51 | * @c: I2O controller |
| 52 | * @msg: pointer to a I2O message pointer |
| 53 | * @wait: how long to wait until timeout |
| 54 | * |
| 55 | * This function waits up to wait seconds for a message slot to be |
| 56 | * available. |
| 57 | * |
| 58 | * On a success the message is returned and the pointer to the message is |
| 59 | * set in msg. The returned message is the physical page frame offset |
| 60 | * address from the read port (see the i2o spec). If no message is |
| 61 | * available returns I2O_QUEUE_EMPTY and msg is leaved untouched. |
| 62 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 63 | struct i2o_message *i2o_msg_get_wait(struct i2o_controller *c, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | unsigned long timeout = jiffies + wait * HZ; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 66 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 68 | while (IS_ERR(msg = i2o_msg_get(c))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | if (time_after(jiffies, timeout)) { |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 70 | osm_debug("%s: Timeout waiting for message frame.\n", |
| 71 | c->name); |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 72 | return ERR_PTR(-ETIMEDOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
Nishanth Aravamudan | 6521018 | 2005-11-07 01:01:19 -0800 | [diff] [blame] | 74 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |
| 76 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 77 | return msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | }; |
| 79 | |
| 80 | #if BITS_PER_LONG == 64 |
| 81 | /** |
| 82 | * i2o_cntxt_list_add - Append a pointer to context list and return a id |
| 83 | * @c: controller to which the context list belong |
| 84 | * @ptr: pointer to add to the context list |
| 85 | * |
| 86 | * Because the context field in I2O is only 32-bit large, on 64-bit the |
| 87 | * pointer is to large to fit in the context field. The i2o_cntxt_list |
| 88 | * functions therefore map pointers to context fields. |
| 89 | * |
| 90 | * Returns context id > 0 on success or 0 on failure. |
| 91 | */ |
| 92 | u32 i2o_cntxt_list_add(struct i2o_controller * c, void *ptr) |
| 93 | { |
| 94 | struct i2o_context_list_element *entry; |
| 95 | unsigned long flags; |
| 96 | |
| 97 | if (!ptr) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 98 | osm_err("%s: couldn't add NULL pointer to context list!\n", |
| 99 | c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
| 102 | if (!entry) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 103 | osm_err("%s: Could not allocate memory for context list element" |
| 104 | "\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | entry->ptr = ptr; |
| 109 | entry->timestamp = jiffies; |
| 110 | INIT_LIST_HEAD(&entry->list); |
| 111 | |
| 112 | spin_lock_irqsave(&c->context_list_lock, flags); |
| 113 | |
| 114 | if (unlikely(atomic_inc_and_test(&c->context_list_counter))) |
| 115 | atomic_inc(&c->context_list_counter); |
| 116 | |
| 117 | entry->context = atomic_read(&c->context_list_counter); |
| 118 | |
| 119 | list_add(&entry->list, &c->context_list); |
| 120 | |
| 121 | spin_unlock_irqrestore(&c->context_list_lock, flags); |
| 122 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 123 | osm_debug("%s: Add context to list %p -> %d\n", c->name, ptr, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | return entry->context; |
| 126 | }; |
| 127 | |
| 128 | /** |
| 129 | * i2o_cntxt_list_remove - Remove a pointer from the context list |
| 130 | * @c: controller to which the context list belong |
| 131 | * @ptr: pointer which should be removed from the context list |
| 132 | * |
| 133 | * Removes a previously added pointer from the context list and returns |
| 134 | * the matching context id. |
| 135 | * |
| 136 | * Returns context id on succes or 0 on failure. |
| 137 | */ |
| 138 | u32 i2o_cntxt_list_remove(struct i2o_controller * c, void *ptr) |
| 139 | { |
| 140 | struct i2o_context_list_element *entry; |
| 141 | u32 context = 0; |
| 142 | unsigned long flags; |
| 143 | |
| 144 | spin_lock_irqsave(&c->context_list_lock, flags); |
| 145 | list_for_each_entry(entry, &c->context_list, list) |
| 146 | if (entry->ptr == ptr) { |
| 147 | list_del(&entry->list); |
| 148 | context = entry->context; |
| 149 | kfree(entry); |
| 150 | break; |
| 151 | } |
| 152 | spin_unlock_irqrestore(&c->context_list_lock, flags); |
| 153 | |
| 154 | if (!context) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 155 | osm_warn("%s: Could not remove nonexistent ptr %p\n", c->name, |
| 156 | ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 158 | osm_debug("%s: remove ptr from context list %d -> %p\n", c->name, |
| 159 | context, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
| 161 | return context; |
| 162 | }; |
| 163 | |
| 164 | /** |
| 165 | * i2o_cntxt_list_get - Get a pointer from the context list and remove it |
| 166 | * @c: controller to which the context list belong |
| 167 | * @context: context id to which the pointer belong |
| 168 | * |
| 169 | * Returns pointer to the matching context id on success or NULL on |
| 170 | * failure. |
| 171 | */ |
| 172 | void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context) |
| 173 | { |
| 174 | struct i2o_context_list_element *entry; |
| 175 | unsigned long flags; |
| 176 | void *ptr = NULL; |
| 177 | |
| 178 | spin_lock_irqsave(&c->context_list_lock, flags); |
| 179 | list_for_each_entry(entry, &c->context_list, list) |
| 180 | if (entry->context == context) { |
| 181 | list_del(&entry->list); |
| 182 | ptr = entry->ptr; |
| 183 | kfree(entry); |
| 184 | break; |
| 185 | } |
| 186 | spin_unlock_irqrestore(&c->context_list_lock, flags); |
| 187 | |
| 188 | if (!ptr) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 189 | osm_warn("%s: context id %d not found\n", c->name, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 191 | osm_debug("%s: get ptr from context list %d -> %p\n", c->name, context, |
| 192 | ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
| 194 | return ptr; |
| 195 | }; |
| 196 | |
| 197 | /** |
| 198 | * i2o_cntxt_list_get_ptr - Get a context id from the context list |
| 199 | * @c: controller to which the context list belong |
| 200 | * @ptr: pointer to which the context id should be fetched |
| 201 | * |
| 202 | * Returns context id which matches to the pointer on succes or 0 on |
| 203 | * failure. |
| 204 | */ |
| 205 | u32 i2o_cntxt_list_get_ptr(struct i2o_controller * c, void *ptr) |
| 206 | { |
| 207 | struct i2o_context_list_element *entry; |
| 208 | u32 context = 0; |
| 209 | unsigned long flags; |
| 210 | |
| 211 | spin_lock_irqsave(&c->context_list_lock, flags); |
| 212 | list_for_each_entry(entry, &c->context_list, list) |
| 213 | if (entry->ptr == ptr) { |
| 214 | context = entry->context; |
| 215 | break; |
| 216 | } |
| 217 | spin_unlock_irqrestore(&c->context_list_lock, flags); |
| 218 | |
| 219 | if (!context) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 220 | osm_warn("%s: Could not find nonexistent ptr %p\n", c->name, |
| 221 | ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 223 | osm_debug("%s: get context id from context list %p -> %d\n", c->name, |
| 224 | ptr, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | return context; |
| 227 | }; |
| 228 | #endif |
| 229 | |
| 230 | /** |
| 231 | * i2o_iop_find - Find an I2O controller by id |
| 232 | * @unit: unit number of the I2O controller to search for |
| 233 | * |
| 234 | * Lookup the I2O controller on the controller list. |
| 235 | * |
| 236 | * Returns pointer to the I2O controller on success or NULL if not found. |
| 237 | */ |
| 238 | struct i2o_controller *i2o_find_iop(int unit) |
| 239 | { |
| 240 | struct i2o_controller *c; |
| 241 | |
| 242 | list_for_each_entry(c, &i2o_controllers, list) { |
| 243 | if (c->unit == unit) |
| 244 | return c; |
| 245 | } |
| 246 | |
| 247 | return NULL; |
| 248 | }; |
| 249 | |
| 250 | /** |
| 251 | * i2o_iop_find_device - Find a I2O device on an I2O controller |
| 252 | * @c: I2O controller where the I2O device hangs on |
| 253 | * @tid: TID of the I2O device to search for |
| 254 | * |
| 255 | * Searches the devices of the I2O controller for a device with TID tid and |
| 256 | * returns it. |
| 257 | * |
| 258 | * Returns a pointer to the I2O device if found, otherwise NULL. |
| 259 | */ |
| 260 | struct i2o_device *i2o_iop_find_device(struct i2o_controller *c, u16 tid) |
| 261 | { |
| 262 | struct i2o_device *dev; |
| 263 | |
| 264 | list_for_each_entry(dev, &c->devices, list) |
| 265 | if (dev->lct_data.tid == tid) |
| 266 | return dev; |
| 267 | |
| 268 | return NULL; |
| 269 | }; |
| 270 | |
| 271 | /** |
| 272 | * i2o_quiesce_controller - quiesce controller |
| 273 | * @c: controller |
| 274 | * |
| 275 | * Quiesce an IOP. Causes IOP to make external operation quiescent |
| 276 | * (i2o 'READY' state). Internal operation of the IOP continues normally. |
| 277 | * |
| 278 | * Returns 0 on success or negative error code on failure. |
| 279 | */ |
| 280 | static int i2o_iop_quiesce(struct i2o_controller *c) |
| 281 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 282 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | i2o_status_block *sb = c->status_block.virt; |
| 284 | int rc; |
| 285 | |
| 286 | i2o_status_get(c); |
| 287 | |
| 288 | /* SysQuiesce discarded if IOP not in READY or OPERATIONAL state */ |
| 289 | if ((sb->iop_state != ADAPTER_STATE_READY) && |
| 290 | (sb->iop_state != ADAPTER_STATE_OPERATIONAL)) |
| 291 | return 0; |
| 292 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 293 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 294 | if (IS_ERR(msg)) |
| 295 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 297 | msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 298 | msg->u.head[1] = |
| 299 | cpu_to_le32(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 | |
| 300 | ADAPTER_TID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | /* Long timeout needed for quiesce if lots of devices */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 303 | if ((rc = i2o_msg_post_wait(c, msg, 240))) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 304 | osm_info("%s: Unable to quiesce (status=%#x).\n", c->name, -rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | else |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 306 | osm_debug("%s: Quiesced.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | i2o_status_get(c); // Entered READY state |
| 309 | |
| 310 | return rc; |
| 311 | }; |
| 312 | |
| 313 | /** |
| 314 | * i2o_iop_enable - move controller from ready to OPERATIONAL |
| 315 | * @c: I2O controller |
| 316 | * |
| 317 | * Enable IOP. This allows the IOP to resume external operations and |
| 318 | * reverses the effect of a quiesce. Returns zero or an error code if |
| 319 | * an error occurs. |
| 320 | */ |
| 321 | static int i2o_iop_enable(struct i2o_controller *c) |
| 322 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 323 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | i2o_status_block *sb = c->status_block.virt; |
| 325 | int rc; |
| 326 | |
| 327 | i2o_status_get(c); |
| 328 | |
| 329 | /* Enable only allowed on READY state */ |
| 330 | if (sb->iop_state != ADAPTER_STATE_READY) |
| 331 | return -EINVAL; |
| 332 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 333 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 334 | if (IS_ERR(msg)) |
| 335 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 337 | msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 338 | msg->u.head[1] = |
| 339 | cpu_to_le32(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 | |
| 340 | ADAPTER_TID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
| 342 | /* How long of a timeout do we need? */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 343 | if ((rc = i2o_msg_post_wait(c, msg, 240))) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 344 | osm_err("%s: Could not enable (status=%#x).\n", c->name, -rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | else |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 346 | osm_debug("%s: Enabled.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | i2o_status_get(c); // entered OPERATIONAL state |
| 349 | |
| 350 | return rc; |
| 351 | }; |
| 352 | |
| 353 | /** |
| 354 | * i2o_iop_quiesce_all - Quiesce all I2O controllers on the system |
| 355 | * |
| 356 | * Quiesce all I2O controllers which are connected to the system. |
| 357 | */ |
| 358 | static inline void i2o_iop_quiesce_all(void) |
| 359 | { |
| 360 | struct i2o_controller *c, *tmp; |
| 361 | |
| 362 | list_for_each_entry_safe(c, tmp, &i2o_controllers, list) { |
| 363 | if (!c->no_quiesce) |
| 364 | i2o_iop_quiesce(c); |
| 365 | } |
| 366 | }; |
| 367 | |
| 368 | /** |
| 369 | * i2o_iop_enable_all - Enables all controllers on the system |
| 370 | * |
| 371 | * Enables all I2O controllers which are connected to the system. |
| 372 | */ |
| 373 | static inline void i2o_iop_enable_all(void) |
| 374 | { |
| 375 | struct i2o_controller *c, *tmp; |
| 376 | |
| 377 | list_for_each_entry_safe(c, tmp, &i2o_controllers, list) |
| 378 | i2o_iop_enable(c); |
| 379 | }; |
| 380 | |
| 381 | /** |
| 382 | * i2o_clear_controller - Bring I2O controller into HOLD state |
| 383 | * @c: controller |
| 384 | * |
| 385 | * Clear an IOP to HOLD state, ie. terminate external operations, clear all |
| 386 | * input queues and prepare for a system restart. IOP's internal operation |
| 387 | * continues normally and the outbound queue is alive. The IOP is not |
| 388 | * expected to rebuild its LCT. |
| 389 | * |
| 390 | * Returns 0 on success or negative error code on failure. |
| 391 | */ |
| 392 | static int i2o_iop_clear(struct i2o_controller *c) |
| 393 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 394 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | int rc; |
| 396 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 397 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 398 | if (IS_ERR(msg)) |
| 399 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | /* Quiesce all IOPs first */ |
| 402 | i2o_iop_quiesce_all(); |
| 403 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 404 | msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 405 | msg->u.head[1] = |
| 406 | cpu_to_le32(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 | |
| 407 | ADAPTER_TID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 409 | if ((rc = i2o_msg_post_wait(c, msg, 30))) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 410 | osm_info("%s: Unable to clear (status=%#x).\n", c->name, -rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | else |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 412 | osm_debug("%s: Cleared.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
| 414 | /* Enable all IOPs */ |
| 415 | i2o_iop_enable_all(); |
| 416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | return rc; |
| 418 | } |
| 419 | |
| 420 | /** |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 421 | * i2o_iop_init_outbound_queue - setup the outbound message queue |
| 422 | * @c: I2O controller |
| 423 | * |
| 424 | * Clear and (re)initialize IOP's outbound queue and post the message |
| 425 | * frames to the IOP. |
| 426 | * |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 427 | * Returns 0 on success or negative error code on failure. |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 428 | */ |
| 429 | static int i2o_iop_init_outbound_queue(struct i2o_controller *c) |
| 430 | { |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 431 | u32 m; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 432 | volatile u8 *status = c->status.virt; |
| 433 | struct i2o_message *msg; |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 434 | ulong timeout; |
| 435 | int i; |
| 436 | |
| 437 | osm_debug("%s: Initializing Outbound Queue...\n", c->name); |
| 438 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 439 | memset(c->status.virt, 0, 4); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 440 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 441 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 442 | if (IS_ERR(msg)) |
| 443 | return PTR_ERR(msg); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 444 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 445 | msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); |
| 446 | msg->u.head[1] = |
| 447 | cpu_to_le32(I2O_CMD_OUTBOUND_INIT << 24 | HOST_TID << 12 | |
| 448 | ADAPTER_TID); |
| 449 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
| 450 | msg->u.s.tcntxt = cpu_to_le32(0x00000000); |
| 451 | msg->body[0] = cpu_to_le32(PAGE_SIZE); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 452 | /* Outbound msg frame size in words and Initcode */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 453 | msg->body[1] = cpu_to_le32(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80); |
| 454 | msg->body[2] = cpu_to_le32(0xd0000004); |
| 455 | msg->body[3] = cpu_to_le32(i2o_dma_low(c->status.phys)); |
| 456 | msg->body[4] = cpu_to_le32(i2o_dma_high(c->status.phys)); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 457 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 458 | i2o_msg_post(c, msg); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 459 | |
| 460 | timeout = jiffies + I2O_TIMEOUT_INIT_OUTBOUND_QUEUE * HZ; |
| 461 | while (*status <= I2O_CMD_IN_PROGRESS) { |
| 462 | if (time_after(jiffies, timeout)) { |
| 463 | osm_warn("%s: Timeout Initializing\n", c->name); |
| 464 | return -ETIMEDOUT; |
| 465 | } |
Nishanth Aravamudan | 6521018 | 2005-11-07 01:01:19 -0800 | [diff] [blame] | 466 | schedule_timeout_uninterruptible(1); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | m = c->out_queue.phys; |
| 470 | |
| 471 | /* Post frames */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 472 | for (i = 0; i < I2O_MAX_OUTBOUND_MSG_FRAMES; i++) { |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 473 | i2o_flush_reply(c, m); |
| 474 | udelay(1); /* Promise */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 475 | m += I2O_OUTBOUND_MSG_FRAME_SIZE * sizeof(u32); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | * i2o_iop_reset - reset an I2O controller |
| 483 | * @c: controller to reset |
| 484 | * |
| 485 | * Reset the IOP into INIT state and wait until IOP gets into RESET state. |
| 486 | * Terminate all external operations, clear IOP's inbound and outbound |
| 487 | * queues, terminate all DDMs, and reload the IOP's operating environment |
| 488 | * and all local DDMs. The IOP rebuilds its LCT. |
| 489 | */ |
| 490 | static int i2o_iop_reset(struct i2o_controller *c) |
| 491 | { |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 492 | volatile u8 *status = c->status.virt; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 493 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | unsigned long timeout; |
| 495 | i2o_status_block *sb = c->status_block.virt; |
| 496 | int rc = 0; |
| 497 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 498 | osm_debug("%s: Resetting controller\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 500 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 501 | if (IS_ERR(msg)) |
| 502 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 504 | memset(c->status_block.virt, 0, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | /* Quiesce all IOPs first */ |
| 507 | i2o_iop_quiesce_all(); |
| 508 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 509 | msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 510 | msg->u.head[1] = |
| 511 | cpu_to_le32(I2O_CMD_ADAPTER_RESET << 24 | HOST_TID << 12 | |
| 512 | ADAPTER_TID); |
| 513 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
| 514 | msg->u.s.tcntxt = cpu_to_le32(0x00000000); |
| 515 | msg->body[0] = cpu_to_le32(0x00000000); |
| 516 | msg->body[1] = cpu_to_le32(0x00000000); |
| 517 | msg->body[2] = cpu_to_le32(i2o_dma_low(c->status.phys)); |
| 518 | msg->body[3] = cpu_to_le32(i2o_dma_high(c->status.phys)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 520 | i2o_msg_post(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
| 522 | /* Wait for a reply */ |
| 523 | timeout = jiffies + I2O_TIMEOUT_RESET * HZ; |
| 524 | while (!*status) { |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 525 | if (time_after(jiffies, timeout)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Nishanth Aravamudan | 6521018 | 2005-11-07 01:01:19 -0800 | [diff] [blame] | 528 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 531 | switch (*status) { |
| 532 | case I2O_CMD_REJECTED: |
| 533 | osm_warn("%s: IOP reset rejected\n", c->name); |
| 534 | rc = -EPERM; |
| 535 | break; |
| 536 | |
| 537 | case I2O_CMD_IN_PROGRESS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | /* |
| 539 | * Once the reset is sent, the IOP goes into the INIT state |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 540 | * which is indeterminate. We need to wait until the IOP has |
| 541 | * rebooted before we can let the system talk to it. We read |
| 542 | * the inbound Free_List until a message is available. If we |
| 543 | * can't read one in the given ammount of time, we assume the |
| 544 | * IOP could not reboot properly. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | */ |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 546 | osm_debug("%s: Reset in progress, waiting for reboot...\n", |
| 547 | c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 549 | while (IS_ERR(msg = i2o_msg_get_wait(c, I2O_TIMEOUT_RESET))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if (time_after(jiffies, timeout)) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 551 | osm_err("%s: IOP reset timeout.\n", c->name); |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 552 | rc = PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | goto exit; |
| 554 | } |
Nishanth Aravamudan | 6521018 | 2005-11-07 01:01:19 -0800 | [diff] [blame] | 555 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 557 | i2o_msg_nop(c, msg); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 558 | |
| 559 | /* from here all quiesce commands are safe */ |
| 560 | c->no_quiesce = 0; |
| 561 | |
| 562 | /* verify if controller is in state RESET */ |
| 563 | i2o_status_get(c); |
| 564 | |
| 565 | if (!c->promise && (sb->iop_state != ADAPTER_STATE_RESET)) |
| 566 | osm_warn("%s: reset completed, but adapter not in RESET" |
| 567 | " state.\n", c->name); |
| 568 | else |
| 569 | osm_debug("%s: reset completed.\n", c->name); |
| 570 | |
| 571 | break; |
| 572 | |
| 573 | default: |
| 574 | osm_err("%s: IOP reset timeout.\n", c->name); |
| 575 | rc = -ETIMEDOUT; |
| 576 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | exit: |
| 580 | /* Enable all IOPs */ |
| 581 | i2o_iop_enable_all(); |
| 582 | |
| 583 | return rc; |
| 584 | }; |
| 585 | |
| 586 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | * i2o_iop_activate - Bring controller up to HOLD |
| 588 | * @c: controller |
| 589 | * |
| 590 | * This function brings an I2O controller into HOLD state. The adapter |
| 591 | * is reset if necessary and then the queues and resource table are read. |
| 592 | * |
| 593 | * Returns 0 on success or negative error code on failure. |
| 594 | */ |
| 595 | static int i2o_iop_activate(struct i2o_controller *c) |
| 596 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | i2o_status_block *sb = c->status_block.virt; |
| 598 | int rc; |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 599 | int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
| 601 | /* In INIT state, Wait Inbound Q to initialize (in i2o_status_get) */ |
| 602 | /* In READY state, Get status */ |
| 603 | |
| 604 | rc = i2o_status_get(c); |
| 605 | if (rc) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 606 | osm_info("%s: Unable to obtain status, attempting a reset.\n", |
| 607 | c->name); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 608 | rc = i2o_iop_reset(c); |
| 609 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | return rc; |
| 611 | } |
| 612 | |
| 613 | if (sb->i2o_version > I2OVER15) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 614 | osm_err("%s: Not running version 1.5 of the I2O Specification." |
| 615 | "\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | return -ENODEV; |
| 617 | } |
| 618 | |
| 619 | switch (sb->iop_state) { |
| 620 | case ADAPTER_STATE_FAULTED: |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 621 | osm_err("%s: hardware fault\n", c->name); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 622 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
| 624 | case ADAPTER_STATE_READY: |
| 625 | case ADAPTER_STATE_OPERATIONAL: |
| 626 | case ADAPTER_STATE_HOLD: |
| 627 | case ADAPTER_STATE_FAILED: |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 628 | osm_debug("%s: already running, trying to reset...\n", c->name); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 629 | rc = i2o_iop_reset(c); |
| 630 | if (rc) |
| 631 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 634 | /* preserve state */ |
| 635 | state = sb->iop_state; |
| 636 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | rc = i2o_iop_init_outbound_queue(c); |
| 638 | if (rc) |
| 639 | return rc; |
| 640 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 641 | /* if adapter was not in RESET state clear now */ |
| 642 | if (state != ADAPTER_STATE_RESET) |
| 643 | i2o_iop_clear(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 645 | i2o_status_get(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 647 | if (sb->iop_state != ADAPTER_STATE_HOLD) { |
| 648 | osm_err("%s: failed to bring IOP into HOLD state\n", c->name); |
| 649 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
| 651 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 652 | return i2o_hrt_get(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | }; |
| 654 | |
| 655 | /** |
| 656 | * i2o_iop_systab_set - Set the I2O System Table of the specified IOP |
| 657 | * @c: I2O controller to which the system table should be send |
| 658 | * |
| 659 | * Before the systab could be set i2o_systab_build() must be called. |
| 660 | * |
| 661 | * Returns 0 on success or negative error code on failure. |
| 662 | */ |
| 663 | static int i2o_iop_systab_set(struct i2o_controller *c) |
| 664 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 665 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | i2o_status_block *sb = c->status_block.virt; |
| 667 | struct device *dev = &c->pdev->dev; |
| 668 | struct resource *root; |
| 669 | int rc; |
| 670 | |
| 671 | if (sb->current_mem_size < sb->desired_mem_size) { |
| 672 | struct resource *res = &c->mem_resource; |
| 673 | res->name = c->pdev->bus->name; |
| 674 | res->flags = IORESOURCE_MEM; |
| 675 | res->start = 0; |
| 676 | res->end = 0; |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 677 | osm_info("%s: requires private memory resources.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | root = pci_find_parent_resource(c->pdev, res); |
| 679 | if (root == NULL) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 680 | osm_warn("%s: Can't find parent resource!\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | if (root && allocate_resource(root, res, sb->desired_mem_size, sb->desired_mem_size, sb->desired_mem_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */ |
| 682 | NULL, NULL) >= 0) { |
| 683 | c->mem_alloc = 1; |
| 684 | sb->current_mem_size = 1 + res->end - res->start; |
| 685 | sb->current_mem_base = res->start; |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 686 | osm_info("%s: allocated %ld bytes of PCI memory at " |
| 687 | "0x%08lX.\n", c->name, |
| 688 | 1 + res->end - res->start, res->start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
| 690 | } |
| 691 | |
| 692 | if (sb->current_io_size < sb->desired_io_size) { |
| 693 | struct resource *res = &c->io_resource; |
| 694 | res->name = c->pdev->bus->name; |
| 695 | res->flags = IORESOURCE_IO; |
| 696 | res->start = 0; |
| 697 | res->end = 0; |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 698 | osm_info("%s: requires private memory resources.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | root = pci_find_parent_resource(c->pdev, res); |
| 700 | if (root == NULL) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 701 | osm_warn("%s: Can't find parent resource!\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */ |
| 703 | NULL, NULL) >= 0) { |
| 704 | c->io_alloc = 1; |
| 705 | sb->current_io_size = 1 + res->end - res->start; |
| 706 | sb->current_mem_base = res->start; |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 707 | osm_info("%s: allocated %ld bytes of PCI I/O at 0x%08lX" |
| 708 | ".\n", c->name, 1 + res->end - res->start, |
| 709 | res->start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | } |
| 712 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 713 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 714 | if (IS_ERR(msg)) |
| 715 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | i2o_systab.phys = dma_map_single(dev, i2o_systab.virt, i2o_systab.len, |
| 718 | PCI_DMA_TODEVICE); |
| 719 | if (!i2o_systab.phys) { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 720 | i2o_msg_nop(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | return -ENOMEM; |
| 722 | } |
| 723 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 724 | msg->u.head[0] = cpu_to_le32(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6); |
| 725 | msg->u.head[1] = |
| 726 | cpu_to_le32(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 | |
| 727 | ADAPTER_TID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | /* |
| 730 | * Provide three SGL-elements: |
| 731 | * System table (SysTab), Private memory space declaration and |
| 732 | * Private i/o space declaration |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | */ |
| 734 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 735 | msg->body[0] = cpu_to_le32(c->unit + 2); |
| 736 | msg->body[1] = cpu_to_le32(0x00000000); |
| 737 | msg->body[2] = cpu_to_le32(0x54000000 | i2o_systab.len); |
| 738 | msg->body[3] = cpu_to_le32(i2o_systab.phys); |
| 739 | msg->body[4] = cpu_to_le32(0x54000000 | sb->current_mem_size); |
| 740 | msg->body[5] = cpu_to_le32(sb->current_mem_base); |
| 741 | msg->body[6] = cpu_to_le32(0xd4000000 | sb->current_io_size); |
| 742 | msg->body[6] = cpu_to_le32(sb->current_io_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 744 | rc = i2o_msg_post_wait(c, msg, 120); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | dma_unmap_single(dev, i2o_systab.phys, i2o_systab.len, |
| 747 | PCI_DMA_TODEVICE); |
| 748 | |
| 749 | if (rc < 0) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 750 | osm_err("%s: Unable to set SysTab (status=%#x).\n", c->name, |
| 751 | -rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | else |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 753 | osm_debug("%s: SysTab set.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | return rc; |
| 756 | } |
| 757 | |
| 758 | /** |
| 759 | * i2o_iop_online - Bring a controller online into OPERATIONAL state. |
| 760 | * @c: I2O controller |
| 761 | * |
| 762 | * Send the system table and enable the I2O controller. |
| 763 | * |
Markus Lidel | 2e1973a | 2006-01-06 00:19:32 -0800 | [diff] [blame] | 764 | * Returns 0 on success or negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | */ |
| 766 | static int i2o_iop_online(struct i2o_controller *c) |
| 767 | { |
| 768 | int rc; |
| 769 | |
| 770 | rc = i2o_iop_systab_set(c); |
| 771 | if (rc) |
| 772 | return rc; |
| 773 | |
| 774 | /* In READY state */ |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 775 | osm_debug("%s: Attempting to enable...\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | rc = i2o_iop_enable(c); |
| 777 | if (rc) |
| 778 | return rc; |
| 779 | |
| 780 | return 0; |
| 781 | }; |
| 782 | |
| 783 | /** |
| 784 | * i2o_iop_remove - Remove the I2O controller from the I2O core |
| 785 | * @c: I2O controller |
| 786 | * |
| 787 | * Remove the I2O controller from the I2O core. If devices are attached to |
| 788 | * the controller remove these also and finally reset the controller. |
| 789 | */ |
| 790 | void i2o_iop_remove(struct i2o_controller *c) |
| 791 | { |
| 792 | struct i2o_device *dev, *tmp; |
| 793 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 794 | osm_debug("%s: deleting controller\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
| 796 | i2o_driver_notify_controller_remove_all(c); |
| 797 | |
| 798 | list_del(&c->list); |
| 799 | |
| 800 | list_for_each_entry_safe(dev, tmp, &c->devices, list) |
| 801 | i2o_device_remove(dev); |
| 802 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 803 | device_del(&c->device); |
| 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | /* Ask the IOP to switch to RESET state */ |
| 806 | i2o_iop_reset(c); |
| 807 | } |
| 808 | |
| 809 | /** |
| 810 | * i2o_systab_build - Build system table |
| 811 | * |
| 812 | * The system table contains information about all the IOPs in the system |
| 813 | * (duh) and is used by the Executives on the IOPs to establish peer2peer |
| 814 | * connections. We're not supporting peer2peer at the moment, but this |
| 815 | * will be needed down the road for things like lan2lan forwarding. |
| 816 | * |
| 817 | * Returns 0 on success or negative error code on failure. |
| 818 | */ |
| 819 | static int i2o_systab_build(void) |
| 820 | { |
| 821 | struct i2o_controller *c, *tmp; |
| 822 | int num_controllers = 0; |
| 823 | u32 change_ind = 0; |
| 824 | int count = 0; |
| 825 | struct i2o_sys_tbl *systab = i2o_systab.virt; |
| 826 | |
| 827 | list_for_each_entry_safe(c, tmp, &i2o_controllers, list) |
| 828 | num_controllers++; |
| 829 | |
| 830 | if (systab) { |
| 831 | change_ind = systab->change_ind; |
| 832 | kfree(i2o_systab.virt); |
| 833 | } |
| 834 | |
| 835 | /* Header + IOPs */ |
| 836 | i2o_systab.len = sizeof(struct i2o_sys_tbl) + num_controllers * |
| 837 | sizeof(struct i2o_sys_tbl_entry); |
| 838 | |
Markus Lidel | f6ed39a | 2006-01-06 00:19:33 -0800 | [diff] [blame] | 839 | systab = i2o_systab.virt = kzalloc(i2o_systab.len, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | if (!systab) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 841 | osm_err("unable to allocate memory for System Table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | return -ENOMEM; |
| 843 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
| 845 | systab->version = I2OVERSION; |
| 846 | systab->change_ind = change_ind + 1; |
| 847 | |
| 848 | list_for_each_entry_safe(c, tmp, &i2o_controllers, list) { |
| 849 | i2o_status_block *sb; |
| 850 | |
| 851 | if (count >= num_controllers) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 852 | osm_err("controller added while building system table" |
| 853 | "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | break; |
| 855 | } |
| 856 | |
| 857 | sb = c->status_block.virt; |
| 858 | |
| 859 | /* |
| 860 | * Get updated IOP state so we have the latest information |
| 861 | * |
| 862 | * We should delete the controller at this point if it |
| 863 | * doesn't respond since if it's not on the system table |
| 864 | * it is techninically not part of the I2O subsystem... |
| 865 | */ |
| 866 | if (unlikely(i2o_status_get(c))) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 867 | osm_err("%s: Deleting b/c could not get status while " |
| 868 | "attempting to build system table\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | i2o_iop_remove(c); |
| 870 | continue; // try the next one |
| 871 | } |
| 872 | |
| 873 | systab->iops[count].org_id = sb->org_id; |
| 874 | systab->iops[count].iop_id = c->unit + 2; |
| 875 | systab->iops[count].seg_num = 0; |
| 876 | systab->iops[count].i2o_version = sb->i2o_version; |
| 877 | systab->iops[count].iop_state = sb->iop_state; |
| 878 | systab->iops[count].msg_type = sb->msg_type; |
| 879 | systab->iops[count].frame_size = sb->inbound_frame_size; |
| 880 | systab->iops[count].last_changed = change_ind; |
| 881 | systab->iops[count].iop_capabilities = sb->iop_capabilities; |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 882 | systab->iops[count].inbound_low = |
| 883 | i2o_dma_low(c->base.phys + I2O_IN_PORT); |
| 884 | systab->iops[count].inbound_high = |
| 885 | i2o_dma_high(c->base.phys + I2O_IN_PORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | count++; |
| 888 | } |
| 889 | |
| 890 | systab->num_entries = count; |
| 891 | |
| 892 | return 0; |
| 893 | }; |
| 894 | |
| 895 | /** |
| 896 | * i2o_parse_hrt - Parse the hardware resource table. |
| 897 | * @c: I2O controller |
| 898 | * |
| 899 | * We don't do anything with it except dumping it (in debug mode). |
| 900 | * |
| 901 | * Returns 0. |
| 902 | */ |
| 903 | static int i2o_parse_hrt(struct i2o_controller *c) |
| 904 | { |
| 905 | i2o_dump_hrt(c); |
| 906 | return 0; |
| 907 | }; |
| 908 | |
| 909 | /** |
| 910 | * i2o_status_get - Get the status block from the I2O controller |
| 911 | * @c: I2O controller |
| 912 | * |
| 913 | * Issue a status query on the controller. This updates the attached |
| 914 | * status block. The status block could then be accessed through |
| 915 | * c->status_block. |
| 916 | * |
| 917 | * Returns 0 on sucess or negative error code on failure. |
| 918 | */ |
| 919 | int i2o_status_get(struct i2o_controller *c) |
| 920 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 921 | struct i2o_message *msg; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 922 | volatile u8 *status_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | unsigned long timeout; |
| 924 | |
| 925 | status_block = (u8 *) c->status_block.virt; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 926 | memset(c->status_block.virt, 0, sizeof(i2o_status_block)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 928 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 929 | if (IS_ERR(msg)) |
| 930 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 932 | msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 933 | msg->u.head[1] = |
| 934 | cpu_to_le32(I2O_CMD_STATUS_GET << 24 | HOST_TID << 12 | |
| 935 | ADAPTER_TID); |
| 936 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
| 937 | msg->u.s.tcntxt = cpu_to_le32(0x00000000); |
| 938 | msg->body[0] = cpu_to_le32(0x00000000); |
| 939 | msg->body[1] = cpu_to_le32(0x00000000); |
| 940 | msg->body[2] = cpu_to_le32(i2o_dma_low(c->status_block.phys)); |
| 941 | msg->body[3] = cpu_to_le32(i2o_dma_high(c->status_block.phys)); |
| 942 | msg->body[4] = cpu_to_le32(sizeof(i2o_status_block)); /* always 88 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 944 | i2o_msg_post(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* Wait for a reply */ |
| 947 | timeout = jiffies + I2O_TIMEOUT_STATUS_GET * HZ; |
| 948 | while (status_block[87] != 0xFF) { |
| 949 | if (time_after(jiffies, timeout)) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 950 | osm_err("%s: Get status timeout.\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | return -ETIMEDOUT; |
| 952 | } |
| 953 | |
Nishanth Aravamudan | 6521018 | 2005-11-07 01:01:19 -0800 | [diff] [blame] | 954 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | #ifdef DEBUG |
| 958 | i2o_debug_state(c); |
| 959 | #endif |
| 960 | |
| 961 | return 0; |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * i2o_hrt_get - Get the Hardware Resource Table from the I2O controller |
| 966 | * @c: I2O controller from which the HRT should be fetched |
| 967 | * |
| 968 | * The HRT contains information about possible hidden devices but is |
| 969 | * mostly useless to us. |
| 970 | * |
Markus Lidel | 2e1973a | 2006-01-06 00:19:32 -0800 | [diff] [blame] | 971 | * Returns 0 on success or negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | */ |
| 973 | static int i2o_hrt_get(struct i2o_controller *c) |
| 974 | { |
| 975 | int rc; |
| 976 | int i; |
| 977 | i2o_hrt *hrt = c->hrt.virt; |
| 978 | u32 size = sizeof(i2o_hrt); |
| 979 | struct device *dev = &c->pdev->dev; |
| 980 | |
| 981 | for (i = 0; i < I2O_HRT_GET_TRIES; i++) { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 982 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 984 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 985 | if (IS_ERR(msg)) |
| 986 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 988 | msg->u.head[0] = cpu_to_le32(SIX_WORD_MSG_SIZE | SGL_OFFSET_4); |
| 989 | msg->u.head[1] = |
| 990 | cpu_to_le32(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 | |
| 991 | ADAPTER_TID); |
| 992 | msg->body[0] = cpu_to_le32(0xd0000000 | c->hrt.len); |
| 993 | msg->body[1] = cpu_to_le32(c->hrt.phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 995 | rc = i2o_msg_post_wait_mem(c, msg, 20, &c->hrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
| 997 | if (rc < 0) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 998 | osm_err("%s: Unable to get HRT (status=%#x)\n", c->name, |
| 999 | -rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | return rc; |
| 1001 | } |
| 1002 | |
| 1003 | size = hrt->num_entries * hrt->entry_len << 2; |
| 1004 | if (size > c->hrt.len) { |
| 1005 | if (i2o_dma_realloc(dev, &c->hrt, size, GFP_KERNEL)) |
| 1006 | return -ENOMEM; |
| 1007 | else |
| 1008 | hrt = c->hrt.virt; |
| 1009 | } else |
| 1010 | return i2o_parse_hrt(c); |
| 1011 | } |
| 1012 | |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 1013 | osm_err("%s: Unable to get HRT after %d tries, giving up\n", c->name, |
| 1014 | I2O_HRT_GET_TRIES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
| 1016 | return -EBUSY; |
| 1017 | } |
| 1018 | |
| 1019 | /** |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1020 | * i2o_iop_release - release the memory for a I2O controller |
| 1021 | * @dev: I2O controller which should be released |
| 1022 | * |
| 1023 | * Release the allocated memory. This function is called if refcount of |
| 1024 | * device reaches 0 automatically. |
| 1025 | */ |
| 1026 | static void i2o_iop_release(struct device *dev) |
| 1027 | { |
| 1028 | struct i2o_controller *c = to_i2o_controller(dev); |
| 1029 | |
| 1030 | i2o_iop_free(c); |
| 1031 | }; |
| 1032 | |
| 1033 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | * i2o_iop_alloc - Allocate and initialize a i2o_controller struct |
| 1035 | * |
| 1036 | * Allocate the necessary memory for a i2o_controller struct and |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1037 | * initialize the lists and message mempool. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | * |
| 1039 | * Returns a pointer to the I2O controller or a negative error code on |
| 1040 | * failure. |
| 1041 | */ |
| 1042 | struct i2o_controller *i2o_iop_alloc(void) |
| 1043 | { |
| 1044 | static int unit = 0; /* 0 and 1 are NULL IOP and Local Host */ |
| 1045 | struct i2o_controller *c; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1046 | char poolname[32]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
Markus Lidel | f6ed39a | 2006-01-06 00:19:33 -0800 | [diff] [blame] | 1048 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | if (!c) { |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 1050 | osm_err("i2o: Insufficient memory to allocate a I2O controller." |
| 1051 | "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return ERR_PTR(-ENOMEM); |
| 1053 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1055 | c->unit = unit++; |
| 1056 | sprintf(c->name, "iop%d", c->unit); |
| 1057 | |
| 1058 | snprintf(poolname, sizeof(poolname), "i2o_%s_msg_inpool", c->name); |
| 1059 | if (i2o_pool_alloc |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 1060 | (&c->in_msg, poolname, I2O_INBOUND_MSG_FRAME_SIZE * 4 + sizeof(u32), |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1061 | I2O_MSG_INPOOL_MIN)) { |
| 1062 | kfree(c); |
| 1063 | return ERR_PTR(-ENOMEM); |
| 1064 | }; |
| 1065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | INIT_LIST_HEAD(&c->devices); |
| 1067 | spin_lock_init(&c->lock); |
| 1068 | init_MUTEX(&c->lct_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1070 | device_initialize(&c->device); |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1071 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1072 | c->device.release = &i2o_iop_release; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1073 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1074 | snprintf(c->device.bus_id, BUS_ID_SIZE, "iop%d", c->unit); |
| 1075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | #if BITS_PER_LONG == 64 |
| 1077 | spin_lock_init(&c->context_list_lock); |
| 1078 | atomic_set(&c->context_list_counter, 0); |
| 1079 | INIT_LIST_HEAD(&c->context_list); |
| 1080 | #endif |
| 1081 | |
| 1082 | return c; |
| 1083 | }; |
| 1084 | |
| 1085 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | * i2o_iop_add - Initialize the I2O controller and add him to the I2O core |
| 1087 | * @c: controller |
| 1088 | * |
| 1089 | * Initialize the I2O controller and if no error occurs add him to the I2O |
| 1090 | * core. |
| 1091 | * |
| 1092 | * Returns 0 on success or negative error code on failure. |
| 1093 | */ |
| 1094 | int i2o_iop_add(struct i2o_controller *c) |
| 1095 | { |
| 1096 | int rc; |
| 1097 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1098 | if ((rc = device_add(&c->device))) { |
| 1099 | osm_err("%s: could not add controller\n", c->name); |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1100 | goto iop_reset; |
| 1101 | } |
| 1102 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1103 | osm_info("%s: Activating I2O controller...\n", c->name); |
| 1104 | osm_info("%s: This may take a few minutes if there are many devices\n", |
| 1105 | c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
| 1107 | if ((rc = i2o_iop_activate(c))) { |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1108 | osm_err("%s: could not activate controller\n", c->name); |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame] | 1109 | goto device_del; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1112 | osm_debug("%s: building sys table...\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1114 | if ((rc = i2o_systab_build())) |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame] | 1115 | goto device_del; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1117 | osm_debug("%s: online controller...\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1119 | if ((rc = i2o_iop_online(c))) |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame] | 1120 | goto device_del; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1122 | osm_debug("%s: getting LCT...\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1124 | if ((rc = i2o_exec_lct_get(c))) |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame] | 1125 | goto device_del; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
| 1127 | list_add(&c->list, &i2o_controllers); |
| 1128 | |
| 1129 | i2o_driver_notify_controller_add_all(c); |
| 1130 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1131 | osm_info("%s: Controller added\n", c->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
| 1133 | return 0; |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1134 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1135 | device_del: |
| 1136 | device_del(&c->device); |
| 1137 | |
| 1138 | iop_reset: |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 1139 | i2o_iop_reset(c); |
| 1140 | |
| 1141 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | }; |
| 1143 | |
| 1144 | /** |
| 1145 | * i2o_event_register - Turn on/off event notification for a I2O device |
| 1146 | * @dev: I2O device which should receive the event registration request |
| 1147 | * @drv: driver which want to get notified |
| 1148 | * @tcntxt: transaction context to use with this notifier |
| 1149 | * @evt_mask: mask of events |
| 1150 | * |
| 1151 | * Create and posts an event registration message to the task. No reply |
| 1152 | * is waited for, or expected. If you do not want further notifications, |
| 1153 | * call the i2o_event_register again with a evt_mask of 0. |
| 1154 | * |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1155 | * Returns 0 on success or negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | */ |
| 1157 | int i2o_event_register(struct i2o_device *dev, struct i2o_driver *drv, |
| 1158 | int tcntxt, u32 evt_mask) |
| 1159 | { |
| 1160 | struct i2o_controller *c = dev->iop; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1161 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1163 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 1164 | if (IS_ERR(msg)) |
| 1165 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1167 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 1168 | msg->u.head[1] = |
| 1169 | cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev-> |
| 1170 | lct_data.tid); |
| 1171 | msg->u.s.icntxt = cpu_to_le32(drv->context); |
| 1172 | msg->u.s.tcntxt = cpu_to_le32(tcntxt); |
| 1173 | msg->body[0] = cpu_to_le32(evt_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 1175 | i2o_msg_post(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
| 1177 | return 0; |
| 1178 | }; |
| 1179 | |
| 1180 | /** |
| 1181 | * i2o_iop_init - I2O main initialization function |
| 1182 | * |
| 1183 | * Initialize the I2O drivers (OSM) functions, register the Executive OSM, |
| 1184 | * initialize the I2O PCI part and finally initialize I2O device stuff. |
| 1185 | * |
| 1186 | * Returns 0 on success or negative error code on failure. |
| 1187 | */ |
| 1188 | static int __init i2o_iop_init(void) |
| 1189 | { |
| 1190 | int rc = 0; |
| 1191 | |
| 1192 | printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n"); |
| 1193 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1194 | if ((rc = i2o_driver_init())) |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame] | 1195 | goto exit; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1196 | |
| 1197 | if ((rc = i2o_exec_init())) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | goto driver_exit; |
| 1199 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 1200 | if ((rc = i2o_pci_init())) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | goto exec_exit; |
| 1202 | |
| 1203 | return 0; |
| 1204 | |
| 1205 | exec_exit: |
| 1206 | i2o_exec_exit(); |
| 1207 | |
| 1208 | driver_exit: |
| 1209 | i2o_driver_exit(); |
| 1210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | exit: |
| 1212 | return rc; |
| 1213 | } |
| 1214 | |
| 1215 | /** |
| 1216 | * i2o_iop_exit - I2O main exit function |
| 1217 | * |
| 1218 | * Removes I2O controllers from PCI subsystem and shut down OSMs. |
| 1219 | */ |
| 1220 | static void __exit i2o_iop_exit(void) |
| 1221 | { |
| 1222 | i2o_pci_exit(); |
| 1223 | i2o_exec_exit(); |
| 1224 | i2o_driver_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | }; |
| 1226 | |
| 1227 | module_init(i2o_iop_init); |
| 1228 | module_exit(i2o_iop_exit); |
| 1229 | |
| 1230 | MODULE_AUTHOR("Red Hat Software"); |
| 1231 | MODULE_LICENSE("GPL"); |
| 1232 | MODULE_DESCRIPTION(OSM_DESCRIPTION); |
| 1233 | MODULE_VERSION(OSM_VERSION); |
| 1234 | |
| 1235 | #if BITS_PER_LONG == 64 |
| 1236 | EXPORT_SYMBOL(i2o_cntxt_list_add); |
| 1237 | EXPORT_SYMBOL(i2o_cntxt_list_get); |
| 1238 | EXPORT_SYMBOL(i2o_cntxt_list_remove); |
| 1239 | EXPORT_SYMBOL(i2o_cntxt_list_get_ptr); |
| 1240 | #endif |
| 1241 | EXPORT_SYMBOL(i2o_msg_get_wait); |
| 1242 | EXPORT_SYMBOL(i2o_msg_nop); |
| 1243 | EXPORT_SYMBOL(i2o_find_iop); |
| 1244 | EXPORT_SYMBOL(i2o_iop_find_device); |
| 1245 | EXPORT_SYMBOL(i2o_event_register); |
| 1246 | EXPORT_SYMBOL(i2o_status_get); |
| 1247 | EXPORT_SYMBOL(i2o_controllers); |