1 /* 2 * RapidIO interconnect services 3 * (RapidIO Interconnect Specification, http://www.rapidio.org) 4 * 5 * Copyright 2005 MontaVista Software, Inc. 6 * Matt Porter <mporter@kernel.crashing.org> 7 * 8 * Copyright 2009 Integrated Device Technology, Inc. 9 * Alex Bounine <alexandre.bounine@idt.com> 10 * - Added Port-Write/Error Management initialization and handling 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 */ 17 18 #include <linux/types.h> 19 #include <linux/kernel.h> 20 21 #include <linux/delay.h> 22 #include <linux/init.h> 23 #include <linux/rio.h> 24 #include <linux/rio_drv.h> 25 #include <linux/rio_ids.h> 26 #include <linux/rio_regs.h> 27 #include <linux/module.h> 28 #include <linux/spinlock.h> 29 #include <linux/slab.h> 30 #include <linux/interrupt.h> 31 32 #include "rio.h" 33 34 static LIST_HEAD(rio_mports); 35 36 /** 37 * rio_local_get_device_id - Get the base/extended device id for a port 38 * @port: RIO master port from which to get the deviceid 39 * 40 * Reads the base/extended device id from the local device 41 * implementing the master port. Returns the 8/16-bit device 42 * id. 43 */ 44 u16 rio_local_get_device_id(struct rio_mport *port) 45 { 46 u32 result; 47 48 rio_local_read_config_32(port, RIO_DID_CSR, &result); 49 50 return (RIO_GET_DID(port->sys_size, result)); 51 } 52 53 /** 54 * rio_request_inb_mbox - request inbound mailbox service 55 * @mport: RIO master port from which to allocate the mailbox resource 56 * @dev_id: Device specific pointer to pass on event 57 * @mbox: Mailbox number to claim 58 * @entries: Number of entries in inbound mailbox queue 59 * @minb: Callback to execute when inbound message is received 60 * 61 * Requests ownership of an inbound mailbox resource and binds 62 * a callback function to the resource. Returns %0 on success. 63 */ 64 int rio_request_inb_mbox(struct rio_mport *mport, 65 void *dev_id, 66 int mbox, 67 int entries, 68 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, 69 int slot)) 70 { 71 int rc = 0; 72 73 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 74 75 if (res) { 76 rio_init_mbox_res(res, mbox, mbox); 77 78 /* Make sure this mailbox isn't in use */ 79 if ((rc = 80 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], 81 res)) < 0) { 82 kfree(res); 83 goto out; 84 } 85 86 mport->inb_msg[mbox].res = res; 87 88 /* Hook the inbound message callback */ 89 mport->inb_msg[mbox].mcback = minb; 90 91 rc = rio_open_inb_mbox(mport, dev_id, mbox, entries); 92 } else 93 rc = -ENOMEM; 94 95 out: 96 return rc; 97 } 98 99 /** 100 * rio_release_inb_mbox - release inbound mailbox message service 101 * @mport: RIO master port from which to release the mailbox resource 102 * @mbox: Mailbox number to release 103 * 104 * Releases ownership of an inbound mailbox resource. Returns 0 105 * if the request has been satisfied. 106 */ 107 int rio_release_inb_mbox(struct rio_mport *mport, int mbox) 108 { 109 rio_close_inb_mbox(mport, mbox); 110 111 /* Release the mailbox resource */ 112 return release_resource(mport->inb_msg[mbox].res); 113 } 114 115 /** 116 * rio_request_outb_mbox - request outbound mailbox service 117 * @mport: RIO master port from which to allocate the mailbox resource 118 * @dev_id: Device specific pointer to pass on event 119 * @mbox: Mailbox number to claim 120 * @entries: Number of entries in outbound mailbox queue 121 * @moutb: Callback to execute when outbound message is sent 122 * 123 * Requests ownership of an outbound mailbox resource and binds 124 * a callback function to the resource. Returns 0 on success. 125 */ 126 int rio_request_outb_mbox(struct rio_mport *mport, 127 void *dev_id, 128 int mbox, 129 int entries, 130 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) 131 { 132 int rc = 0; 133 134 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 135 136 if (res) { 137 rio_init_mbox_res(res, mbox, mbox); 138 139 /* Make sure this outbound mailbox isn't in use */ 140 if ((rc = 141 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 142 res)) < 0) { 143 kfree(res); 144 goto out; 145 } 146 147 mport->outb_msg[mbox].res = res; 148 149 /* Hook the inbound message callback */ 150 mport->outb_msg[mbox].mcback = moutb; 151 152 rc = rio_open_outb_mbox(mport, dev_id, mbox, entries); 153 } else 154 rc = -ENOMEM; 155 156 out: 157 return rc; 158 } 159 160 /** 161 * rio_release_outb_mbox - release outbound mailbox message service 162 * @mport: RIO master port from which to release the mailbox resource 163 * @mbox: Mailbox number to release 164 * 165 * Releases ownership of an inbound mailbox resource. Returns 0 166 * if the request has been satisfied. 167 */ 168 int rio_release_outb_mbox(struct rio_mport *mport, int mbox) 169 { 170 rio_close_outb_mbox(mport, mbox); 171 172 /* Release the mailbox resource */ 173 return release_resource(mport->outb_msg[mbox].res); 174 } 175 176 /** 177 * rio_setup_inb_dbell - bind inbound doorbell callback 178 * @mport: RIO master port to bind the doorbell callback 179 * @dev_id: Device specific pointer to pass on event 180 * @res: Doorbell message resource 181 * @dinb: Callback to execute when doorbell is received 182 * 183 * Adds a doorbell resource/callback pair into a port's 184 * doorbell event list. Returns 0 if the request has been 185 * satisfied. 186 */ 187 static int 188 rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, 189 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, 190 u16 info)) 191 { 192 int rc = 0; 193 struct rio_dbell *dbell; 194 195 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { 196 rc = -ENOMEM; 197 goto out; 198 } 199 200 dbell->res = res; 201 dbell->dinb = dinb; 202 dbell->dev_id = dev_id; 203 204 list_add_tail(&dbell->node, &mport->dbells); 205 206 out: 207 return rc; 208 } 209 210 /** 211 * rio_request_inb_dbell - request inbound doorbell message service 212 * @mport: RIO master port from which to allocate the doorbell resource 213 * @dev_id: Device specific pointer to pass on event 214 * @start: Doorbell info range start 215 * @end: Doorbell info range end 216 * @dinb: Callback to execute when doorbell is received 217 * 218 * Requests ownership of an inbound doorbell resource and binds 219 * a callback function to the resource. Returns 0 if the request 220 * has been satisfied. 221 */ 222 int rio_request_inb_dbell(struct rio_mport *mport, 223 void *dev_id, 224 u16 start, 225 u16 end, 226 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, 227 u16 dst, u16 info)) 228 { 229 int rc = 0; 230 231 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 232 233 if (res) { 234 rio_init_dbell_res(res, start, end); 235 236 /* Make sure these doorbells aren't in use */ 237 if ((rc = 238 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], 239 res)) < 0) { 240 kfree(res); 241 goto out; 242 } 243 244 /* Hook the doorbell callback */ 245 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); 246 } else 247 rc = -ENOMEM; 248 249 out: 250 return rc; 251 } 252 253 /** 254 * rio_release_inb_dbell - release inbound doorbell message service 255 * @mport: RIO master port from which to release the doorbell resource 256 * @start: Doorbell info range start 257 * @end: Doorbell info range end 258 * 259 * Releases ownership of an inbound doorbell resource and removes 260 * callback from the doorbell event list. Returns 0 if the request 261 * has been satisfied. 262 */ 263 int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) 264 { 265 int rc = 0, found = 0; 266 struct rio_dbell *dbell; 267 268 list_for_each_entry(dbell, &mport->dbells, node) { 269 if ((dbell->res->start == start) && (dbell->res->end == end)) { 270 found = 1; 271 break; 272 } 273 } 274 275 /* If we can't find an exact match, fail */ 276 if (!found) { 277 rc = -EINVAL; 278 goto out; 279 } 280 281 /* Delete from list */ 282 list_del(&dbell->node); 283 284 /* Release the doorbell resource */ 285 rc = release_resource(dbell->res); 286 287 /* Free the doorbell event */ 288 kfree(dbell); 289 290 out: 291 return rc; 292 } 293 294 /** 295 * rio_request_outb_dbell - request outbound doorbell message range 296 * @rdev: RIO device from which to allocate the doorbell resource 297 * @start: Doorbell message range start 298 * @end: Doorbell message range end 299 * 300 * Requests ownership of a doorbell message range. Returns a resource 301 * if the request has been satisfied or %NULL on failure. 302 */ 303 struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, 304 u16 end) 305 { 306 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 307 308 if (res) { 309 rio_init_dbell_res(res, start, end); 310 311 /* Make sure these doorbells aren't in use */ 312 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) 313 < 0) { 314 kfree(res); 315 res = NULL; 316 } 317 } 318 319 return res; 320 } 321 322 /** 323 * rio_release_outb_dbell - release outbound doorbell message range 324 * @rdev: RIO device from which to release the doorbell resource 325 * @res: Doorbell resource to be freed 326 * 327 * Releases ownership of a doorbell message range. Returns 0 if the 328 * request has been satisfied. 329 */ 330 int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) 331 { 332 int rc = release_resource(res); 333 334 kfree(res); 335 336 return rc; 337 } 338 339 /** 340 * rio_request_inb_pwrite - request inbound port-write message service 341 * @rdev: RIO device to which register inbound port-write callback routine 342 * @pwcback: Callback routine to execute when port-write is received 343 * 344 * Binds a port-write callback function to the RapidIO device. 345 * Returns 0 if the request has been satisfied. 346 */ 347 int rio_request_inb_pwrite(struct rio_dev *rdev, 348 int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) 349 { 350 int rc = 0; 351 352 spin_lock(&rio_global_list_lock); 353 if (rdev->pwcback != NULL) 354 rc = -ENOMEM; 355 else 356 rdev->pwcback = pwcback; 357 358 spin_unlock(&rio_global_list_lock); 359 return rc; 360 } 361 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); 362 363 /** 364 * rio_release_inb_pwrite - release inbound port-write message service 365 * @rdev: RIO device which registered for inbound port-write callback 366 * 367 * Removes callback from the rio_dev structure. Returns 0 if the request 368 * has been satisfied. 369 */ 370 int rio_release_inb_pwrite(struct rio_dev *rdev) 371 { 372 int rc = -ENOMEM; 373 374 spin_lock(&rio_global_list_lock); 375 if (rdev->pwcback) { 376 rdev->pwcback = NULL; 377 rc = 0; 378 } 379 380 spin_unlock(&rio_global_list_lock); 381 return rc; 382 } 383 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); 384 385 /** 386 * rio_mport_get_physefb - Helper function that returns register offset 387 * for Physical Layer Extended Features Block. 388 * @port: Master port to issue transaction 389 * @local: Indicate a local master port or remote device access 390 * @destid: Destination ID of the device 391 * @hopcount: Number of switch hops to the device 392 */ 393 u32 394 rio_mport_get_physefb(struct rio_mport *port, int local, 395 u16 destid, u8 hopcount) 396 { 397 u32 ext_ftr_ptr; 398 u32 ftr_header; 399 400 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); 401 402 while (ext_ftr_ptr) { 403 if (local) 404 rio_local_read_config_32(port, ext_ftr_ptr, 405 &ftr_header); 406 else 407 rio_mport_read_config_32(port, destid, hopcount, 408 ext_ftr_ptr, &ftr_header); 409 410 ftr_header = RIO_GET_BLOCK_ID(ftr_header); 411 switch (ftr_header) { 412 413 case RIO_EFB_SER_EP_ID_V13P: 414 case RIO_EFB_SER_EP_REC_ID_V13P: 415 case RIO_EFB_SER_EP_FREE_ID_V13P: 416 case RIO_EFB_SER_EP_ID: 417 case RIO_EFB_SER_EP_REC_ID: 418 case RIO_EFB_SER_EP_FREE_ID: 419 case RIO_EFB_SER_EP_FREC_ID: 420 421 return ext_ftr_ptr; 422 423 default: 424 break; 425 } 426 427 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, 428 hopcount, ext_ftr_ptr); 429 } 430 431 return ext_ftr_ptr; 432 } 433 434 /** 435 * rio_get_comptag - Begin or continue searching for a RIO device by component tag 436 * @comp_tag: RIO component tag to match 437 * @from: Previous RIO device found in search, or %NULL for new search 438 * 439 * Iterates through the list of known RIO devices. If a RIO device is 440 * found with a matching @comp_tag, a pointer to its device 441 * structure is returned. Otherwise, %NULL is returned. A new search 442 * is initiated by passing %NULL to the @from argument. Otherwise, if 443 * @from is not %NULL, searches continue from next device on the global 444 * list. 445 */ 446 static struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) 447 { 448 struct list_head *n; 449 struct rio_dev *rdev; 450 451 spin_lock(&rio_global_list_lock); 452 n = from ? from->global_list.next : rio_devices.next; 453 454 while (n && (n != &rio_devices)) { 455 rdev = rio_dev_g(n); 456 if (rdev->comp_tag == comp_tag) 457 goto exit; 458 n = n->next; 459 } 460 rdev = NULL; 461 exit: 462 spin_unlock(&rio_global_list_lock); 463 return rdev; 464 } 465 466 /** 467 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. 468 * @rdev: Pointer to RIO device control structure 469 * @pnum: Switch port number to set LOCKOUT bit 470 * @lock: Operation : set (=1) or clear (=0) 471 */ 472 int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) 473 { 474 u8 hopcount = 0xff; 475 u16 destid = rdev->destid; 476 u32 regval; 477 478 if (rdev->rswitch) { 479 destid = rdev->rswitch->destid; 480 hopcount = rdev->rswitch->hopcount; 481 } 482 483 rio_mport_read_config_32(rdev->net->hport, destid, hopcount, 484 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), 485 ®val); 486 if (lock) 487 regval |= RIO_PORT_N_CTL_LOCKOUT; 488 else 489 regval &= ~RIO_PORT_N_CTL_LOCKOUT; 490 491 rio_mport_write_config_32(rdev->net->hport, destid, hopcount, 492 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), 493 regval); 494 return 0; 495 } 496 497 /** 498 * rio_inb_pwrite_handler - process inbound port-write message 499 * @pw_msg: pointer to inbound port-write message 500 * 501 * Processes an inbound port-write message. Returns 0 if the request 502 * has been satisfied. 503 */ 504 int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) 505 { 506 struct rio_dev *rdev; 507 struct rio_mport *mport; 508 u8 hopcount; 509 u16 destid; 510 u32 err_status; 511 int rc, portnum; 512 513 rdev = rio_get_comptag(pw_msg->em.comptag, NULL); 514 if (rdev == NULL) { 515 /* Someting bad here (probably enumeration error) */ 516 pr_err("RIO: %s No matching device for CTag 0x%08x\n", 517 __func__, pw_msg->em.comptag); 518 return -EIO; 519 } 520 521 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); 522 523 #ifdef DEBUG_PW 524 { 525 u32 i; 526 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { 527 pr_debug("0x%02x: %08x %08x %08x %08x", 528 i*4, pw_msg->raw[i], pw_msg->raw[i + 1], 529 pw_msg->raw[i + 2], pw_msg->raw[i + 3]); 530 i += 4; 531 } 532 pr_debug("\n"); 533 } 534 #endif 535 536 /* Call an external service function (if such is registered 537 * for this device). This may be the service for endpoints that send 538 * device-specific port-write messages. End-point messages expected 539 * to be handled completely by EP specific device driver. 540 * For switches rc==0 signals that no standard processing required. 541 */ 542 if (rdev->pwcback != NULL) { 543 rc = rdev->pwcback(rdev, pw_msg, 0); 544 if (rc == 0) 545 return 0; 546 } 547 548 /* For End-point devices processing stops here */ 549 if (!(rdev->pef & RIO_PEF_SWITCH)) 550 return 0; 551 552 if (rdev->phys_efptr == 0) { 553 pr_err("RIO_PW: Bad switch initialization for %s\n", 554 rio_name(rdev)); 555 return 0; 556 } 557 558 mport = rdev->net->hport; 559 destid = rdev->rswitch->destid; 560 hopcount = rdev->rswitch->hopcount; 561 562 /* 563 * Process the port-write notification from switch 564 */ 565 566 portnum = pw_msg->em.is_port & 0xFF; 567 568 if (rdev->rswitch->em_handle) 569 rdev->rswitch->em_handle(rdev, portnum); 570 571 rio_mport_read_config_32(mport, destid, hopcount, 572 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), 573 &err_status); 574 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); 575 576 if (pw_msg->em.errdetect) { 577 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", 578 portnum, pw_msg->em.errdetect); 579 /* Clear EM Port N Error Detect CSR */ 580 rio_mport_write_config_32(mport, destid, hopcount, 581 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); 582 } 583 584 if (pw_msg->em.ltlerrdet) { 585 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", 586 pw_msg->em.ltlerrdet); 587 /* Clear EM L/T Layer Error Detect CSR */ 588 rio_mport_write_config_32(mport, destid, hopcount, 589 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); 590 } 591 592 /* Clear Port Errors */ 593 rio_mport_write_config_32(mport, destid, hopcount, 594 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), 595 err_status & RIO_PORT_N_ERR_STS_CLR_MASK); 596 597 if (rdev->rswitch->port_ok & (1 << portnum)) { 598 if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) { 599 rdev->rswitch->port_ok &= ~(1 << portnum); 600 rio_set_port_lockout(rdev, portnum, 1); 601 602 rio_mport_write_config_32(mport, destid, hopcount, 603 rdev->phys_efptr + 604 RIO_PORT_N_ACK_STS_CSR(portnum), 605 RIO_PORT_N_ACK_CLEAR); 606 607 /* Schedule Extraction Service */ 608 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", 609 rio_name(rdev), portnum); 610 } 611 } else { 612 if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { 613 rdev->rswitch->port_ok |= (1 << portnum); 614 rio_set_port_lockout(rdev, portnum, 0); 615 616 /* Schedule Insertion Service */ 617 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", 618 rio_name(rdev), portnum); 619 } 620 } 621 622 /* Clear Port-Write Pending bit */ 623 rio_mport_write_config_32(mport, destid, hopcount, 624 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), 625 RIO_PORT_N_ERR_STS_PW_PEND); 626 627 return 0; 628 } 629 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); 630 631 /** 632 * rio_mport_get_efb - get pointer to next extended features block 633 * @port: Master port to issue transaction 634 * @local: Indicate a local master port or remote device access 635 * @destid: Destination ID of the device 636 * @hopcount: Number of switch hops to the device 637 * @from: Offset of current Extended Feature block header (if 0 starts 638 * from ExtFeaturePtr) 639 */ 640 u32 641 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, 642 u8 hopcount, u32 from) 643 { 644 u32 reg_val; 645 646 if (from == 0) { 647 if (local) 648 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, 649 ®_val); 650 else 651 rio_mport_read_config_32(port, destid, hopcount, 652 RIO_ASM_INFO_CAR, ®_val); 653 return reg_val & RIO_EXT_FTR_PTR_MASK; 654 } else { 655 if (local) 656 rio_local_read_config_32(port, from, ®_val); 657 else 658 rio_mport_read_config_32(port, destid, hopcount, 659 from, ®_val); 660 return RIO_GET_BLOCK_ID(reg_val); 661 } 662 } 663 664 /** 665 * rio_mport_get_feature - query for devices' extended features 666 * @port: Master port to issue transaction 667 * @local: Indicate a local master port or remote device access 668 * @destid: Destination ID of the device 669 * @hopcount: Number of switch hops to the device 670 * @ftr: Extended feature code 671 * 672 * Tell if a device supports a given RapidIO capability. 673 * Returns the offset of the requested extended feature 674 * block within the device's RIO configuration space or 675 * 0 in case the device does not support it. Possible 676 * values for @ftr: 677 * 678 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices 679 * 680 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices 681 * 682 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices 683 * 684 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices 685 * 686 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices 687 * 688 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices 689 */ 690 u32 691 rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, 692 u8 hopcount, int ftr) 693 { 694 u32 asm_info, ext_ftr_ptr, ftr_header; 695 696 if (local) 697 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); 698 else 699 rio_mport_read_config_32(port, destid, hopcount, 700 RIO_ASM_INFO_CAR, &asm_info); 701 702 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; 703 704 while (ext_ftr_ptr) { 705 if (local) 706 rio_local_read_config_32(port, ext_ftr_ptr, 707 &ftr_header); 708 else 709 rio_mport_read_config_32(port, destid, hopcount, 710 ext_ftr_ptr, &ftr_header); 711 if (RIO_GET_BLOCK_ID(ftr_header) == ftr) 712 return ext_ftr_ptr; 713 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) 714 break; 715 } 716 717 return 0; 718 } 719 720 /** 721 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did 722 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids 723 * @did: RIO did to match or %RIO_ANY_ID to match all dids 724 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids 725 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids 726 * @from: Previous RIO device found in search, or %NULL for new search 727 * 728 * Iterates through the list of known RIO devices. If a RIO device is 729 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference 730 * count to the device is incrememted and a pointer to its device 731 * structure is returned. Otherwise, %NULL is returned. A new search 732 * is initiated by passing %NULL to the @from argument. Otherwise, if 733 * @from is not %NULL, searches continue from next device on the global 734 * list. The reference count for @from is always decremented if it is 735 * not %NULL. 736 */ 737 struct rio_dev *rio_get_asm(u16 vid, u16 did, 738 u16 asm_vid, u16 asm_did, struct rio_dev *from) 739 { 740 struct list_head *n; 741 struct rio_dev *rdev; 742 743 WARN_ON(in_interrupt()); 744 spin_lock(&rio_global_list_lock); 745 n = from ? from->global_list.next : rio_devices.next; 746 747 while (n && (n != &rio_devices)) { 748 rdev = rio_dev_g(n); 749 if ((vid == RIO_ANY_ID || rdev->vid == vid) && 750 (did == RIO_ANY_ID || rdev->did == did) && 751 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && 752 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) 753 goto exit; 754 n = n->next; 755 } 756 rdev = NULL; 757 exit: 758 rio_dev_put(from); 759 rdev = rio_dev_get(rdev); 760 spin_unlock(&rio_global_list_lock); 761 return rdev; 762 } 763 764 /** 765 * rio_get_device - Begin or continue searching for a RIO device by vid/did 766 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids 767 * @did: RIO did to match or %RIO_ANY_ID to match all dids 768 * @from: Previous RIO device found in search, or %NULL for new search 769 * 770 * Iterates through the list of known RIO devices. If a RIO device is 771 * found with a matching @vid and @did, the reference count to the 772 * device is incrememted and a pointer to its device structure is returned. 773 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL 774 * to the @from argument. Otherwise, if @from is not %NULL, searches 775 * continue from next device on the global list. The reference count for 776 * @from is always decremented if it is not %NULL. 777 */ 778 struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) 779 { 780 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); 781 } 782 783 /** 784 * rio_std_route_add_entry - Add switch route table entry using standard 785 * registers defined in RIO specification rev.1.3 786 * @mport: Master port to issue transaction 787 * @destid: Destination ID of the device 788 * @hopcount: Number of switch hops to the device 789 * @table: routing table ID (global or port-specific) 790 * @route_destid: destID entry in the RT 791 * @route_port: destination port for specified destID 792 */ 793 int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, 794 u16 table, u16 route_destid, u8 route_port) 795 { 796 if (table == RIO_GLOBAL_TABLE) { 797 rio_mport_write_config_32(mport, destid, hopcount, 798 RIO_STD_RTE_CONF_DESTID_SEL_CSR, 799 (u32)route_destid); 800 rio_mport_write_config_32(mport, destid, hopcount, 801 RIO_STD_RTE_CONF_PORT_SEL_CSR, 802 (u32)route_port); 803 } 804 805 udelay(10); 806 return 0; 807 } 808 809 /** 810 * rio_std_route_get_entry - Read switch route table entry (port number) 811 * associated with specified destID using standard registers defined in RIO 812 * specification rev.1.3 813 * @mport: Master port to issue transaction 814 * @destid: Destination ID of the device 815 * @hopcount: Number of switch hops to the device 816 * @table: routing table ID (global or port-specific) 817 * @route_destid: destID entry in the RT 818 * @route_port: returned destination port for specified destID 819 */ 820 int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, 821 u16 table, u16 route_destid, u8 *route_port) 822 { 823 u32 result; 824 825 if (table == RIO_GLOBAL_TABLE) { 826 rio_mport_write_config_32(mport, destid, hopcount, 827 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); 828 rio_mport_read_config_32(mport, destid, hopcount, 829 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); 830 831 *route_port = (u8)result; 832 } 833 834 return 0; 835 } 836 837 /** 838 * rio_std_route_clr_table - Clear swotch route table using standard registers 839 * defined in RIO specification rev.1.3. 840 * @mport: Master port to issue transaction 841 * @destid: Destination ID of the device 842 * @hopcount: Number of switch hops to the device 843 * @table: routing table ID (global or port-specific) 844 */ 845 int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, 846 u16 table) 847 { 848 u32 max_destid = 0xff; 849 u32 i, pef, id_inc = 1, ext_cfg = 0; 850 u32 port_sel = RIO_INVALID_ROUTE; 851 852 if (table == RIO_GLOBAL_TABLE) { 853 rio_mport_read_config_32(mport, destid, hopcount, 854 RIO_PEF_CAR, &pef); 855 856 if (mport->sys_size) { 857 rio_mport_read_config_32(mport, destid, hopcount, 858 RIO_SWITCH_RT_LIMIT, 859 &max_destid); 860 max_destid &= RIO_RT_MAX_DESTID; 861 } 862 863 if (pef & RIO_PEF_EXT_RT) { 864 ext_cfg = 0x80000000; 865 id_inc = 4; 866 port_sel = (RIO_INVALID_ROUTE << 24) | 867 (RIO_INVALID_ROUTE << 16) | 868 (RIO_INVALID_ROUTE << 8) | 869 RIO_INVALID_ROUTE; 870 } 871 872 for (i = 0; i <= max_destid;) { 873 rio_mport_write_config_32(mport, destid, hopcount, 874 RIO_STD_RTE_CONF_DESTID_SEL_CSR, 875 ext_cfg | i); 876 rio_mport_write_config_32(mport, destid, hopcount, 877 RIO_STD_RTE_CONF_PORT_SEL_CSR, 878 port_sel); 879 i += id_inc; 880 } 881 } 882 883 udelay(10); 884 return 0; 885 } 886 887 static void rio_fixup_device(struct rio_dev *dev) 888 { 889 } 890 891 static int __devinit rio_init(void) 892 { 893 struct rio_dev *dev = NULL; 894 895 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { 896 rio_fixup_device(dev); 897 } 898 return 0; 899 } 900 901 device_initcall(rio_init); 902 903 int __devinit rio_init_mports(void) 904 { 905 int rc = 0; 906 struct rio_mport *port; 907 908 list_for_each_entry(port, &rio_mports, node) { 909 if (!request_mem_region(port->iores.start, 910 port->iores.end - port->iores.start, 911 port->name)) { 912 printk(KERN_ERR 913 "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", 914 (u64)port->iores.start, (u64)port->iores.end - 1); 915 rc = -ENOMEM; 916 goto out; 917 } 918 919 if (port->host_deviceid >= 0) 920 rio_enum_mport(port); 921 else 922 rio_disc_mport(port); 923 } 924 925 out: 926 return rc; 927 } 928 929 void rio_register_mport(struct rio_mport *port) 930 { 931 list_add_tail(&port->node, &rio_mports); 932 } 933 934 EXPORT_SYMBOL_GPL(rio_local_get_device_id); 935 EXPORT_SYMBOL_GPL(rio_get_device); 936 EXPORT_SYMBOL_GPL(rio_get_asm); 937 EXPORT_SYMBOL_GPL(rio_request_inb_dbell); 938 EXPORT_SYMBOL_GPL(rio_release_inb_dbell); 939 EXPORT_SYMBOL_GPL(rio_request_outb_dbell); 940 EXPORT_SYMBOL_GPL(rio_release_outb_dbell); 941 EXPORT_SYMBOL_GPL(rio_request_inb_mbox); 942 EXPORT_SYMBOL_GPL(rio_release_inb_mbox); 943 EXPORT_SYMBOL_GPL(rio_request_outb_mbox); 944 EXPORT_SYMBOL_GPL(rio_release_outb_mbox); 945