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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 | /* * Functions to handle I2O devices * * Copyright (C) 2004 Markus Lidel <Markus.Lidel@shadowconnect.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * Fixes/additions: * Markus Lidel <Markus.Lidel@shadowconnect.com> * initial version. */ #include <linux/module.h> #include <linux/i2o.h> #include <linux/delay.h> /* Exec OSM functions */ extern struct bus_type i2o_bus_type; /** * i2o_device_issue_claim - claim or release a device * @dev: I2O device to claim or release * @cmd: claim or release command * @type: type of claim * * Issue I2O UTIL_CLAIM or UTIL_RELEASE messages. The message to be sent * is set by cmd. dev is the I2O device which should be claim or * released and the type is the claim type (see the I2O spec). * * Returs 0 on success or negative error code on failure. */ static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd, u32 type) { struct i2o_message __iomem *msg; u32 m; m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET); if (m == I2O_QUEUE_EMPTY) return -ETIMEDOUT; writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]); writel(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid, &msg->u.head[1]); writel(type, &msg->body[0]); return i2o_msg_post_wait(dev->iop, m, 60); }; /** * i2o_device_claim - claim a device for use by an OSM * @dev: I2O device to claim * @drv: I2O driver which wants to claim the device * * Do the leg work to assign a device to a given OSM. If the claim succeed * the owner of the rimary. If the attempt fails a negative errno code * is returned. On success zero is returned. */ int i2o_device_claim(struct i2o_device *dev) { int rc = 0; down(&dev->lock); rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY); if (!rc) pr_debug("i2o: claim of device %d succeded\n", dev->lct_data.tid); else pr_debug("i2o: claim of device %d failed %d\n", dev->lct_data.tid, rc); up(&dev->lock); return rc; }; /** * i2o_device_claim_release - release a device that the OSM is using * @dev: device to release * @drv: driver which claimed the device * * Drop a claim by an OSM on a given I2O device. * * AC - some devices seem to want to refuse an unclaim until they have * finished internal processing. It makes sense since you don't want a * new device to go reconfiguring the entire system until you are done. * Thus we are prepared to wait briefly. * * Returns 0 on success or negative error code on failure. */ int i2o_device_claim_release(struct i2o_device *dev) { int tries; int rc = 0; down(&dev->lock); /* * If the controller takes a nonblocking approach to * releases we have to sleep/poll for a few times. */ for (tries = 0; tries < 10; tries++) { rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_RELEASE, I2O_CLAIM_PRIMARY); if (!rc) break; ssleep(1); } if (!rc) pr_debug("i2o: claim release of device %d succeded\n", dev->lct_data.tid); else pr_debug("i2o: claim release of device %d failed %d\n", dev->lct_data.tid, rc); up(&dev->lock); return rc; }; /** * i2o_device_release - release the memory for a I2O device * @dev: I2O device which should be released * * Release the allocated memory. This function is called if refcount of * device reaches 0 automatically. */ static void i2o_device_release(struct device *dev) { struct i2o_device *i2o_dev = to_i2o_device(dev); pr_debug("i2o: device %s released\n", dev->bus_id); kfree(i2o_dev); }; /** * i2o_device_class_release - Remove I2O device attributes * @cd: I2O class device which is added to the I2O device class * * Removes attributes from the I2O device again. Also search each device * on the controller for I2O devices which refert to this device as parent * or user and remove this links also. */ static void i2o_device_class_release(struct class_device *cd) { struct i2o_device *i2o_dev, *tmp; struct i2o_controller *c; i2o_dev = to_i2o_device(cd->dev); c = i2o_dev->iop; sysfs_remove_link(&i2o_dev->device.kobj, "parent"); sysfs_remove_link(&i2o_dev->device.kobj, "user"); list_for_each_entry(tmp, &c->devices, list) { if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) sysfs_remove_link(&tmp->device.kobj, "parent"); if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) sysfs_remove_link(&tmp->device.kobj, "user"); } }; /* I2O device class */ static struct class i2o_device_class = { .name = "i2o_device", .release = i2o_device_class_release }; /** * i2o_device_alloc - Allocate a I2O device and initialize it * * Allocate the memory for a I2O device and initialize locks and lists * * Returns the allocated I2O device or a negative error code if the device * could not be allocated. */ static struct i2o_device *i2o_device_alloc(void) { struct i2o_device *dev; dev = kmalloc(sizeof(*dev), GFP_KERNEL); if (!dev) return ERR_PTR(-ENOMEM); memset(dev, 0, sizeof(*dev)); INIT_LIST_HEAD(&dev->list); init_MUTEX(&dev->lock); dev->device.bus = &i2o_bus_type; dev->device.release = &i2o_device_release; dev->classdev.class = &i2o_device_class; dev->classdev.dev = &dev->device; return dev; }; /** * i2o_device_add - allocate a new I2O device and add it to the IOP * @iop: I2O controller where the device is on * @entry: LCT entry of the I2O device * * Allocate a new I2O device and initialize it with the LCT entry. The * device is appended to the device list of the controller. * * Returns a pointer to the I2O device on success or negative error code * on failure. */ static struct i2o_device *i2o_device_add(struct i2o_controller *c, i2o_lct_entry * entry) { struct i2o_device *dev; dev = i2o_device_alloc(); if (IS_ERR(dev)) { printk(KERN_ERR "i2o: unable to allocate i2o device\n"); return dev; } dev->lct_data = *entry; snprintf(dev->device.bus_id, BUS_ID_SIZE, "%d:%03x", c->unit, dev->lct_data.tid); snprintf(dev->classdev.class_id, BUS_ID_SIZE, "%d:%03x", c->unit, dev->lct_data.tid); dev->iop = c; dev->device.parent = &c->device; device_register(&dev->device); list_add_tail(&dev->list, &c->devices); class_device_register(&dev->classdev); i2o_driver_notify_device_add_all(dev); pr_debug("i2o: device %s added\n", dev->device.bus_id); return dev; }; /** * i2o_device_remove - remove an I2O device from the I2O core * @dev: I2O device which should be released * * Is used on I2O controller removal or LCT modification, when the device * is removed from the system. Note that the device could still hang * around until the refcount reaches 0. */ void i2o_device_remove(struct i2o_device *i2o_dev) { i2o_driver_notify_device_remove_all(i2o_dev); class_device_unregister(&i2o_dev->classdev); list_del(&i2o_dev->list); device_unregister(&i2o_dev->device); }; /** * i2o_device_parse_lct - Parse a previously fetched LCT and create devices * @c: I2O controller from which the LCT should be parsed. * * The Logical Configuration Table tells us what we can talk to on the * board. For every entry we create an I2O device, which is registered in * the I2O core. * * Returns 0 on success or negative error code on failure. */ int i2o_device_parse_lct(struct i2o_controller *c) { struct i2o_device *dev, *tmp; i2o_lct *lct; int i; int max; down(&c->lct_lock); if (c->lct) kfree(c->lct); lct = c->dlct.virt; c->lct = kmalloc(lct->table_size * 4, GFP_KERNEL); if (!c->lct) { up(&c->lct_lock); return -ENOMEM; } if (lct->table_size * 4 > c->dlct.len) { memcpy_fromio(c->lct, c->dlct.virt, c->dlct.len); up(&c->lct_lock); return -EAGAIN; } memcpy_fromio(c->lct, c->dlct.virt, lct->table_size * 4); lct = c->lct; max = (lct->table_size - 3) / 9; pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max, lct->table_size); /* remove devices, which are not in the LCT anymore */ list_for_each_entry_safe(dev, tmp, &c->devices, list) { int found = 0; for (i = 0; i < max; i++) { if (lct->lct_entry[i].tid == dev->lct_data.tid) { found = 1; break; } } if (!found) i2o_device_remove(dev); } /* add new devices, which are new in the LCT */ for (i = 0; i < max; i++) { int found = 0; list_for_each_entry_safe(dev, tmp, &c->devices, list) { if (lct->lct_entry[i].tid == dev->lct_data.tid) { found = 1; break; } } if (!found) i2o_device_add(c, &lct->lct_entry[i]); } up(&c->lct_lock); return 0; }; /** * i2o_device_class_show_class_id - Displays class id of I2O device * @cd: class device of which the class id should be displayed * @buf: buffer into which the class id should be printed * * Returns the number of bytes which are printed into the buffer. */ static ssize_t i2o_device_class_show_class_id(struct class_device *cd, char *buf) { struct i2o_device *dev = to_i2o_device(cd->dev); sprintf(buf, "%03x\n", dev->lct_data.class_id); return strlen(buf) + 1; }; /** * i2o_device_class_show_tid - Displays TID of I2O device * @cd: class device of which the TID should be displayed * @buf: buffer into which the class id should be printed * * Returns the number of bytes which are printed into the buffer. */ static ssize_t i2o_device_class_show_tid(struct class_device *cd, char *buf) { struct i2o_device *dev = to_i2o_device(cd->dev); sprintf(buf, "%03x\n", dev->lct_data.tid); return strlen(buf) + 1; }; /* I2O device class attributes */ static CLASS_DEVICE_ATTR(class_id, S_IRUGO, i2o_device_class_show_class_id, NULL); static CLASS_DEVICE_ATTR(tid, S_IRUGO, i2o_device_class_show_tid, NULL); /** * i2o_device_class_add - Adds attributes to the I2O device * @cd: I2O class device which is added to the I2O device class * * This function get called when a I2O device is added to the class. It * creates the attributes for each device and creates user/parent symlink * if necessary. * * Returns 0 on success or negative error code on failure. */ static int i2o_device_class_add(struct class_device *cd) { struct i2o_device *i2o_dev, *tmp; struct i2o_controller *c; i2o_dev = to_i2o_device(cd->dev); c = i2o_dev->iop; class_device_create_file(cd, &class_device_attr_class_id); class_device_create_file(cd, &class_device_attr_tid); /* create user entries for this device */ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid); if (tmp) sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj, "user"); /* create user entries refering to this device */ list_for_each_entry(tmp, &c->devices, list) if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) sysfs_create_link(&tmp->device.kobj, &i2o_dev->device.kobj, "user"); /* create parent entries for this device */ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid); if (tmp) sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj, "parent"); /* create parent entries refering to this device */ list_for_each_entry(tmp, &c->devices, list) if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) sysfs_create_link(&tmp->device.kobj, &i2o_dev->device.kobj, "parent"); return 0; }; /* I2O device class interface */ static struct class_interface i2o_device_class_interface = { .class = &i2o_device_class, .add = i2o_device_class_add }; /* * Run time support routines */ /* Issue UTIL_PARAMS_GET or UTIL_PARAMS_SET * * This function can be used for all UtilParamsGet/Set operations. * The OperationList is given in oplist-buffer, * and results are returned in reslist-buffer. * Note that the minimum sized reslist is 8 bytes and contains * ResultCount, ErrorInfoSize, BlockStatus and BlockSize. */ int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist, int oplen, void *reslist, int reslen) { struct i2o_message __iomem *msg; u32 m; u32 *res32 = (u32 *) reslist; u32 *restmp = (u32 *) reslist; int len = 0; int i = 0; int rc; struct i2o_dma res; struct i2o_controller *c = i2o_dev->iop; struct device *dev = &c->pdev->dev; res.virt = NULL; if (i2o_dma_alloc(dev, &res, reslen, GFP_KERNEL)) return -ENOMEM; m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET); if (m == I2O_QUEUE_EMPTY) { i2o_dma_free(dev, &res); return -ETIMEDOUT; } i = 0; writel(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid, &msg->u.head[1]); writel(0, &msg->body[i++]); writel(0x4C000000 | oplen, &msg->body[i++]); /* OperationList */ memcpy_toio(&msg->body[i], oplist, oplen); i += (oplen / 4 + (oplen % 4 ? 1 : 0)); writel(0xD0000000 | res.len, &msg->body[i++]); /* ResultList */ writel(res.phys, &msg->body[i++]); writel(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) | SGL_OFFSET_5, &msg->u.head[0]); rc = i2o_msg_post_wait_mem(c, m, 10, &res); /* This only looks like a memory leak - don't "fix" it. */ if (rc == -ETIMEDOUT) return rc; memcpy_fromio(reslist, res.virt, res.len); i2o_dma_free(dev, &res); /* Query failed */ if (rc) return rc; /* * Calculate number of bytes of Result LIST * We need to loop through each Result BLOCK and grab the length */ restmp = res32 + 1; len = 1; for (i = 0; i < (res32[0] & 0X0000FFFF); i++) { if (restmp[0] & 0x00FF0000) { /* BlockStatus != SUCCESS */ printk(KERN_WARNING "%s - Error:\n ErrorInfoSize = 0x%02x, " "BlockStatus = 0x%02x, BlockSize = 0x%04x\n", (cmd == I2O_CMD_UTIL_PARAMS_SET) ? "PARAMS_SET" : "PARAMS_GET", res32[1] >> 24, (res32[1] >> 16) & 0xFF, res32[1] & 0xFFFF); /* * If this is the only request,than we return an error */ if ((res32[0] & 0x0000FFFF) == 1) { return -((res32[1] >> 16) & 0xFF); /* -BlockStatus */ } } len += restmp[0] & 0x0000FFFF; /* Length of res BLOCK */ restmp += restmp[0] & 0x0000FFFF; /* Skip to next BLOCK */ } return (len << 2); /* bytes used by result list */ } /* * Query one field group value or a whole scalar group. */ int i2o_parm_field_get(struct i2o_device *i2o_dev, int group, int field, void *buf, int buflen) { u16 opblk[] = { 1, 0, I2O_PARAMS_FIELD_GET, group, 1, field }; u8 resblk[8 + buflen]; /* 8 bytes for header */ int size; if (field == -1) /* whole group */ opblk[4] = -1; size = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk, sizeof(opblk), resblk, sizeof(resblk)); memcpy(buf, resblk + 8, buflen); /* cut off header */ if (size > buflen) return buflen; return size; } /* * if oper == I2O_PARAMS_TABLE_GET, get from all rows * if fieldcount == -1 return all fields * ibuf and ibuflen are unused (use NULL, 0) * else return specific fields * ibuf contains fieldindexes * * if oper == I2O_PARAMS_LIST_GET, get from specific rows * if fieldcount == -1 return all fields * ibuf contains rowcount, keyvalues * else return specific fields * fieldcount is # of fieldindexes * ibuf contains fieldindexes, rowcount, keyvalues * * You could also use directly function i2o_issue_params(). */ int i2o_parm_table_get(struct i2o_device *dev, int oper, int group, int fieldcount, void *ibuf, int ibuflen, void *resblk, int reslen) { u16 *opblk; int size; size = 10 + ibuflen; if (size % 4) size += 4 - size % 4; opblk = kmalloc(size, GFP_KERNEL); if (opblk == NULL) { printk(KERN_ERR "i2o: no memory for query buffer.\n"); return -ENOMEM; } opblk[0] = 1; /* operation count */ opblk[1] = 0; /* pad */ opblk[2] = oper; opblk[3] = group; opblk[4] = fieldcount; memcpy(opblk + 5, ibuf, ibuflen); /* other params */ size = i2o_parm_issue(dev, I2O_CMD_UTIL_PARAMS_GET, opblk, size, resblk, reslen); kfree(opblk); if (size > reslen) return reslen; return size; } /** * i2o_device_init - Initialize I2O devices * * Registers the I2O device class. * * Returns 0 on success or negative error code on failure. */ int i2o_device_init(void) { int rc; rc = class_register(&i2o_device_class); if (rc) return rc; return class_interface_register(&i2o_device_class_interface); }; /** * i2o_device_exit - I2O devices exit function * * Unregisters the I2O device class. */ void i2o_device_exit(void) { class_interface_register(&i2o_device_class_interface); class_unregister(&i2o_device_class); }; EXPORT_SYMBOL(i2o_device_claim); EXPORT_SYMBOL(i2o_device_claim_release); EXPORT_SYMBOL(i2o_parm_field_get); EXPORT_SYMBOL(i2o_parm_table_get); EXPORT_SYMBOL(i2o_parm_issue); |