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 static unsigned char next_portid; 36 static DEFINE_SPINLOCK(rio_mmap_lock); 37 38 /** 39 * rio_local_get_device_id - Get the base/extended device id for a port 40 * @port: RIO master port from which to get the deviceid 41 * 42 * Reads the base/extended device id from the local device 43 * implementing the master port. Returns the 8/16-bit device 44 * id. 45 */ 46 u16 rio_local_get_device_id(struct rio_mport *port) 47 { 48 u32 result; 49 50 rio_local_read_config_32(port, RIO_DID_CSR, &result); 51 52 return (RIO_GET_DID(port->sys_size, result)); 53 } 54 55 /** 56 * rio_request_inb_mbox - request inbound mailbox service 57 * @mport: RIO master port from which to allocate the mailbox resource 58 * @dev_id: Device specific pointer to pass on event 59 * @mbox: Mailbox number to claim 60 * @entries: Number of entries in inbound mailbox queue 61 * @minb: Callback to execute when inbound message is received 62 * 63 * Requests ownership of an inbound mailbox resource and binds 64 * a callback function to the resource. Returns %0 on success. 65 */ 66 int rio_request_inb_mbox(struct rio_mport *mport, 67 void *dev_id, 68 int mbox, 69 int entries, 70 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, 71 int slot)) 72 { 73 int rc = -ENOSYS; 74 struct resource *res; 75 76 if (mport->ops->open_inb_mbox == NULL) 77 goto out; 78 79 res = kmalloc(sizeof(struct resource), GFP_KERNEL); 80 81 if (res) { 82 rio_init_mbox_res(res, mbox, mbox); 83 84 /* Make sure this mailbox isn't in use */ 85 if ((rc = 86 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], 87 res)) < 0) { 88 kfree(res); 89 goto out; 90 } 91 92 mport->inb_msg[mbox].res = res; 93 94 /* Hook the inbound message callback */ 95 mport->inb_msg[mbox].mcback = minb; 96 97 rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); 98 } else 99 rc = -ENOMEM; 100 101 out: 102 return rc; 103 } 104 105 /** 106 * rio_release_inb_mbox - release inbound mailbox message service 107 * @mport: RIO master port from which to release the mailbox resource 108 * @mbox: Mailbox number to release 109 * 110 * Releases ownership of an inbound mailbox resource. Returns 0 111 * if the request has been satisfied. 112 */ 113 int rio_release_inb_mbox(struct rio_mport *mport, int mbox) 114 { 115 if (mport->ops->close_inb_mbox) { 116 mport->ops->close_inb_mbox(mport, mbox); 117 118 /* Release the mailbox resource */ 119 return release_resource(mport->inb_msg[mbox].res); 120 } else 121 return -ENOSYS; 122 } 123 124 /** 125 * rio_request_outb_mbox - request outbound mailbox service 126 * @mport: RIO master port from which to allocate the mailbox resource 127 * @dev_id: Device specific pointer to pass on event 128 * @mbox: Mailbox number to claim 129 * @entries: Number of entries in outbound mailbox queue 130 * @moutb: Callback to execute when outbound message is sent 131 * 132 * Requests ownership of an outbound mailbox resource and binds 133 * a callback function to the resource. Returns 0 on success. 134 */ 135 int rio_request_outb_mbox(struct rio_mport *mport, 136 void *dev_id, 137 int mbox, 138 int entries, 139 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) 140 { 141 int rc = -ENOSYS; 142 struct resource *res; 143 144 if (mport->ops->open_outb_mbox == NULL) 145 goto out; 146 147 res = kmalloc(sizeof(struct resource), GFP_KERNEL); 148 149 if (res) { 150 rio_init_mbox_res(res, mbox, mbox); 151 152 /* Make sure this outbound mailbox isn't in use */ 153 if ((rc = 154 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 155 res)) < 0) { 156 kfree(res); 157 goto out; 158 } 159 160 mport->outb_msg[mbox].res = res; 161 162 /* Hook the inbound message callback */ 163 mport->outb_msg[mbox].mcback = moutb; 164 165 rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); 166 } else 167 rc = -ENOMEM; 168 169 out: 170 return rc; 171 } 172 173 /** 174 * rio_release_outb_mbox - release outbound mailbox message service 175 * @mport: RIO master port from which to release the mailbox resource 176 * @mbox: Mailbox number to release 177 * 178 * Releases ownership of an inbound mailbox resource. Returns 0 179 * if the request has been satisfied. 180 */ 181 int rio_release_outb_mbox(struct rio_mport *mport, int mbox) 182 { 183 if (mport->ops->close_outb_mbox) { 184 mport->ops->close_outb_mbox(mport, mbox); 185 186 /* Release the mailbox resource */ 187 return release_resource(mport->outb_msg[mbox].res); 188 } else 189 return -ENOSYS; 190 } 191 192 /** 193 * rio_setup_inb_dbell - bind inbound doorbell callback 194 * @mport: RIO master port to bind the doorbell callback 195 * @dev_id: Device specific pointer to pass on event 196 * @res: Doorbell message resource 197 * @dinb: Callback to execute when doorbell is received 198 * 199 * Adds a doorbell resource/callback pair into a port's 200 * doorbell event list. Returns 0 if the request has been 201 * satisfied. 202 */ 203 static int 204 rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, 205 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, 206 u16 info)) 207 { 208 int rc = 0; 209 struct rio_dbell *dbell; 210 211 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { 212 rc = -ENOMEM; 213 goto out; 214 } 215 216 dbell->res = res; 217 dbell->dinb = dinb; 218 dbell->dev_id = dev_id; 219 220 list_add_tail(&dbell->node, &mport->dbells); 221 222 out: 223 return rc; 224 } 225 226 /** 227 * rio_request_inb_dbell - request inbound doorbell message service 228 * @mport: RIO master port from which to allocate the doorbell resource 229 * @dev_id: Device specific pointer to pass on event 230 * @start: Doorbell info range start 231 * @end: Doorbell info range end 232 * @dinb: Callback to execute when doorbell is received 233 * 234 * Requests ownership of an inbound doorbell resource and binds 235 * a callback function to the resource. Returns 0 if the request 236 * has been satisfied. 237 */ 238 int rio_request_inb_dbell(struct rio_mport *mport, 239 void *dev_id, 240 u16 start, 241 u16 end, 242 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, 243 u16 dst, u16 info)) 244 { 245 int rc = 0; 246 247 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 248 249 if (res) { 250 rio_init_dbell_res(res, start, end); 251 252 /* Make sure these doorbells aren't in use */ 253 if ((rc = 254 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], 255 res)) < 0) { 256 kfree(res); 257 goto out; 258 } 259 260 /* Hook the doorbell callback */ 261 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); 262 } else 263 rc = -ENOMEM; 264 265 out: 266 return rc; 267 } 268 269 /** 270 * rio_release_inb_dbell - release inbound doorbell message service 271 * @mport: RIO master port from which to release the doorbell resource 272 * @start: Doorbell info range start 273 * @end: Doorbell info range end 274 * 275 * Releases ownership of an inbound doorbell resource and removes 276 * callback from the doorbell event list. Returns 0 if the request 277 * has been satisfied. 278 */ 279 int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) 280 { 281 int rc = 0, found = 0; 282 struct rio_dbell *dbell; 283 284 list_for_each_entry(dbell, &mport->dbells, node) { 285 if ((dbell->res->start == start) && (dbell->res->end == end)) { 286 found = 1; 287 break; 288 } 289 } 290 291 /* If we can't find an exact match, fail */ 292 if (!found) { 293 rc = -EINVAL; 294 goto out; 295 } 296 297 /* Delete from list */ 298 list_del(&dbell->node); 299 300 /* Release the doorbell resource */ 301 rc = release_resource(dbell->res); 302 303 /* Free the doorbell event */ 304 kfree(dbell); 305 306 out: 307 return rc; 308 } 309 310 /** 311 * rio_request_outb_dbell - request outbound doorbell message range 312 * @rdev: RIO device from which to allocate the doorbell resource 313 * @start: Doorbell message range start 314 * @end: Doorbell message range end 315 * 316 * Requests ownership of a doorbell message range. Returns a resource 317 * if the request has been satisfied or %NULL on failure. 318 */ 319 struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, 320 u16 end) 321 { 322 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); 323 324 if (res) { 325 rio_init_dbell_res(res, start, end); 326 327 /* Make sure these doorbells aren't in use */ 328 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) 329 < 0) { 330 kfree(res); 331 res = NULL; 332 } 333 } 334 335 return res; 336 } 337 338 /** 339 * rio_release_outb_dbell - release outbound doorbell message range 340 * @rdev: RIO device from which to release the doorbell resource 341 * @res: Doorbell resource to be freed 342 * 343 * Releases ownership of a doorbell message range. Returns 0 if the 344 * request has been satisfied. 345 */ 346 int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) 347 { 348 int rc = release_resource(res); 349 350 kfree(res); 351 352 return rc; 353 } 354 355 /** 356 * rio_request_inb_pwrite - request inbound port-write message service 357 * @rdev: RIO device to which register inbound port-write callback routine 358 * @pwcback: Callback routine to execute when port-write is received 359 * 360 * Binds a port-write callback function to the RapidIO device. 361 * Returns 0 if the request has been satisfied. 362 */ 363 int rio_request_inb_pwrite(struct rio_dev *rdev, 364 int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) 365 { 366 int rc = 0; 367 368 spin_lock(&rio_global_list_lock); 369 if (rdev->pwcback != NULL) 370 rc = -ENOMEM; 371 else 372 rdev->pwcback = pwcback; 373 374 spin_unlock(&rio_global_list_lock); 375 return rc; 376 } 377 EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); 378 379 /** 380 * rio_release_inb_pwrite - release inbound port-write message service 381 * @rdev: RIO device which registered for inbound port-write callback 382 * 383 * Removes callback from the rio_dev structure. Returns 0 if the request 384 * has been satisfied. 385 */ 386 int rio_release_inb_pwrite(struct rio_dev *rdev) 387 { 388 int rc = -ENOMEM; 389 390 spin_lock(&rio_global_list_lock); 391 if (rdev->pwcback) { 392 rdev->pwcback = NULL; 393 rc = 0; 394 } 395 396 spin_unlock(&rio_global_list_lock); 397 return rc; 398 } 399 EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); 400 401 /** 402 * rio_map_inb_region -- Map inbound memory region. 403 * @mport: Master port. 404 * @local: physical address of memory region to be mapped 405 * @rbase: RIO base address assigned to this window 406 * @size: Size of the memory region 407 * @rflags: Flags for mapping. 408 * 409 * Return: 0 -- Success. 410 * 411 * This function will create the mapping from RIO space to local memory. 412 */ 413 int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, 414 u64 rbase, u32 size, u32 rflags) 415 { 416 int rc = 0; 417 unsigned long flags; 418 419 if (!mport->ops->map_inb) 420 return -1; 421 spin_lock_irqsave(&rio_mmap_lock, flags); 422 rc = mport->ops->map_inb(mport, local, rbase, size, rflags); 423 spin_unlock_irqrestore(&rio_mmap_lock, flags); 424 return rc; 425 } 426 EXPORT_SYMBOL_GPL(rio_map_inb_region); 427 428 /** 429 * rio_unmap_inb_region -- Unmap the inbound memory region 430 * @mport: Master port 431 * @lstart: physical address of memory region to be unmapped 432 */ 433 void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) 434 { 435 unsigned long flags; 436 if (!mport->ops->unmap_inb) 437 return; 438 spin_lock_irqsave(&rio_mmap_lock, flags); 439 mport->ops->unmap_inb(mport, lstart); 440 spin_unlock_irqrestore(&rio_mmap_lock, flags); 441 } 442 EXPORT_SYMBOL_GPL(rio_unmap_inb_region); 443 444 /** 445 * rio_mport_get_physefb - Helper function that returns register offset 446 * for Physical Layer Extended Features Block. 447 * @port: Master port to issue transaction 448 * @local: Indicate a local master port or remote device access 449 * @destid: Destination ID of the device 450 * @hopcount: Number of switch hops to the device 451 */ 452 u32 453 rio_mport_get_physefb(struct rio_mport *port, int local, 454 u16 destid, u8 hopcount) 455 { 456 u32 ext_ftr_ptr; 457 u32 ftr_header; 458 459 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); 460 461 while (ext_ftr_ptr) { 462 if (local) 463 rio_local_read_config_32(port, ext_ftr_ptr, 464 &ftr_header); 465 else 466 rio_mport_read_config_32(port, destid, hopcount, 467 ext_ftr_ptr, &ftr_header); 468 469 ftr_header = RIO_GET_BLOCK_ID(ftr_header); 470 switch (ftr_header) { 471 472 case RIO_EFB_SER_EP_ID_V13P: 473 case RIO_EFB_SER_EP_REC_ID_V13P: 474 case RIO_EFB_SER_EP_FREE_ID_V13P: 475 case RIO_EFB_SER_EP_ID: 476 case RIO_EFB_SER_EP_REC_ID: 477 case RIO_EFB_SER_EP_FREE_ID: 478 case RIO_EFB_SER_EP_FREC_ID: 479 480 return ext_ftr_ptr; 481 482 default: 483 break; 484 } 485 486 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, 487 hopcount, ext_ftr_ptr); 488 } 489 490 return ext_ftr_ptr; 491 } 492 493 /** 494 * rio_get_comptag - Begin or continue searching for a RIO device by component tag 495 * @comp_tag: RIO component tag to match 496 * @from: Previous RIO device found in search, or %NULL for new search 497 * 498 * Iterates through the list of known RIO devices. If a RIO device is 499 * found with a matching @comp_tag, a pointer to its device 500 * structure is returned. Otherwise, %NULL is returned. A new search 501 * is initiated by passing %NULL to the @from argument. Otherwise, if 502 * @from is not %NULL, searches continue from next device on the global 503 * list. 504 */ 505 struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) 506 { 507 struct list_head *n; 508 struct rio_dev *rdev; 509 510 spin_lock(&rio_global_list_lock); 511 n = from ? from->global_list.next : rio_devices.next; 512 513 while (n && (n != &rio_devices)) { 514 rdev = rio_dev_g(n); 515 if (rdev->comp_tag == comp_tag) 516 goto exit; 517 n = n->next; 518 } 519 rdev = NULL; 520 exit: 521 spin_unlock(&rio_global_list_lock); 522 return rdev; 523 } 524 525 /** 526 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. 527 * @rdev: Pointer to RIO device control structure 528 * @pnum: Switch port number to set LOCKOUT bit 529 * @lock: Operation : set (=1) or clear (=0) 530 */ 531 int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) 532 { 533 u32 regval; 534 535 rio_read_config_32(rdev, 536 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), 537 ®val); 538 if (lock) 539 regval |= RIO_PORT_N_CTL_LOCKOUT; 540 else 541 regval &= ~RIO_PORT_N_CTL_LOCKOUT; 542 543 rio_write_config_32(rdev, 544 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), 545 regval); 546 return 0; 547 } 548 549 /** 550 * rio_chk_dev_route - Validate route to the specified device. 551 * @rdev: RIO device failed to respond 552 * @nrdev: Last active device on the route to rdev 553 * @npnum: nrdev's port number on the route to rdev 554 * 555 * Follows a route to the specified RIO device to determine the last available 556 * device (and corresponding RIO port) on the route. 557 */ 558 static int 559 rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) 560 { 561 u32 result; 562 int p_port, rc = -EIO; 563 struct rio_dev *prev = NULL; 564 565 /* Find switch with failed RIO link */ 566 while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { 567 if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { 568 prev = rdev->prev; 569 break; 570 } 571 rdev = rdev->prev; 572 } 573 574 if (prev == NULL) 575 goto err_out; 576 577 p_port = prev->rswitch->route_table[rdev->destid]; 578 579 if (p_port != RIO_INVALID_ROUTE) { 580 pr_debug("RIO: link failed on [%s]-P%d\n", 581 rio_name(prev), p_port); 582 *nrdev = prev; 583 *npnum = p_port; 584 rc = 0; 585 } else 586 pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); 587 err_out: 588 return rc; 589 } 590 591 /** 592 * rio_mport_chk_dev_access - Validate access to the specified device. 593 * @mport: Master port to send transactions 594 * @destid: Device destination ID in network 595 * @hopcount: Number of hops into the network 596 */ 597 int 598 rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) 599 { 600 int i = 0; 601 u32 tmp; 602 603 while (rio_mport_read_config_32(mport, destid, hopcount, 604 RIO_DEV_ID_CAR, &tmp)) { 605 i++; 606 if (i == RIO_MAX_CHK_RETRY) 607 return -EIO; 608 mdelay(1); 609 } 610 611 return 0; 612 } 613 614 /** 615 * rio_chk_dev_access - Validate access to the specified device. 616 * @rdev: Pointer to RIO device control structure 617 */ 618 static int rio_chk_dev_access(struct rio_dev *rdev) 619 { 620 return rio_mport_chk_dev_access(rdev->net->hport, 621 rdev->destid, rdev->hopcount); 622 } 623 624 /** 625 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and 626 * returns link-response (if requested). 627 * @rdev: RIO devive to issue Input-status command 628 * @pnum: Device port number to issue the command 629 * @lnkresp: Response from a link partner 630 */ 631 static int 632 rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) 633 { 634 u32 regval; 635 int checkcount; 636 637 if (lnkresp) { 638 /* Read from link maintenance response register 639 * to clear valid bit */ 640 rio_read_config_32(rdev, 641 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), 642 ®val); 643 udelay(50); 644 } 645 646 /* Issue Input-status command */ 647 rio_write_config_32(rdev, 648 rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), 649 RIO_MNT_REQ_CMD_IS); 650 651 /* Exit if the response is not expected */ 652 if (lnkresp == NULL) 653 return 0; 654 655 checkcount = 3; 656 while (checkcount--) { 657 udelay(50); 658 rio_read_config_32(rdev, 659 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), 660 ®val); 661 if (regval & RIO_PORT_N_MNT_RSP_RVAL) { 662 *lnkresp = regval; 663 return 0; 664 } 665 } 666 667 return -EIO; 668 } 669 670 /** 671 * rio_clr_err_stopped - Clears port Error-stopped states. 672 * @rdev: Pointer to RIO device control structure 673 * @pnum: Switch port number to clear errors 674 * @err_status: port error status (if 0 reads register from device) 675 */ 676 static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) 677 { 678 struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; 679 u32 regval; 680 u32 far_ackid, far_linkstat, near_ackid; 681 682 if (err_status == 0) 683 rio_read_config_32(rdev, 684 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), 685 &err_status); 686 687 if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { 688 pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); 689 /* 690 * Send a Link-Request/Input-Status control symbol 691 */ 692 if (rio_get_input_status(rdev, pnum, ®val)) { 693 pr_debug("RIO_EM: Input-status response timeout\n"); 694 goto rd_err; 695 } 696 697 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", 698 pnum, regval); 699 far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; 700 far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; 701 rio_read_config_32(rdev, 702 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), 703 ®val); 704 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); 705 near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; 706 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ 707 " near_ackID=0x%02x\n", 708 pnum, far_ackid, far_linkstat, near_ackid); 709 710 /* 711 * If required, synchronize ackIDs of near and 712 * far sides. 713 */ 714 if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || 715 (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { 716 /* Align near outstanding/outbound ackIDs with 717 * far inbound. 718 */ 719 rio_write_config_32(rdev, 720 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), 721 (near_ackid << 24) | 722 (far_ackid << 8) | far_ackid); 723 /* Align far outstanding/outbound ackIDs with 724 * near inbound. 725 */ 726 far_ackid++; 727 if (nextdev) 728 rio_write_config_32(nextdev, 729 nextdev->phys_efptr + 730 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), 731 (far_ackid << 24) | 732 (near_ackid << 8) | near_ackid); 733 else 734 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); 735 } 736 rd_err: 737 rio_read_config_32(rdev, 738 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), 739 &err_status); 740 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); 741 } 742 743 if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { 744 pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); 745 rio_get_input_status(nextdev, 746 RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); 747 udelay(50); 748 749 rio_read_config_32(rdev, 750 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), 751 &err_status); 752 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); 753 } 754 755 return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | 756 RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; 757 } 758 759 /** 760 * rio_inb_pwrite_handler - process inbound port-write message 761 * @pw_msg: pointer to inbound port-write message 762 * 763 * Processes an inbound port-write message. Returns 0 if the request 764 * has been satisfied. 765 */ 766 int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) 767 { 768 struct rio_dev *rdev; 769 u32 err_status, em_perrdet, em_ltlerrdet; 770 int rc, portnum; 771 772 rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); 773 if (rdev == NULL) { 774 /* Device removed or enumeration error */ 775 pr_debug("RIO: %s No matching device for CTag 0x%08x\n", 776 __func__, pw_msg->em.comptag); 777 return -EIO; 778 } 779 780 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); 781 782 #ifdef DEBUG_PW 783 { 784 u32 i; 785 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { 786 pr_debug("0x%02x: %08x %08x %08x %08x\n", 787 i*4, pw_msg->raw[i], pw_msg->raw[i + 1], 788 pw_msg->raw[i + 2], pw_msg->raw[i + 3]); 789 i += 4; 790 } 791 } 792 #endif 793 794 /* Call an external service function (if such is registered 795 * for this device). This may be the service for endpoints that send 796 * device-specific port-write messages. End-point messages expected 797 * to be handled completely by EP specific device driver. 798 * For switches rc==0 signals that no standard processing required. 799 */ 800 if (rdev->pwcback != NULL) { 801 rc = rdev->pwcback(rdev, pw_msg, 0); 802 if (rc == 0) 803 return 0; 804 } 805 806 portnum = pw_msg->em.is_port & 0xFF; 807 808 /* Check if device and route to it are functional: 809 * Sometimes devices may send PW message(s) just before being 810 * powered down (or link being lost). 811 */ 812 if (rio_chk_dev_access(rdev)) { 813 pr_debug("RIO: device access failed - get link partner\n"); 814 /* Scan route to the device and identify failed link. 815 * This will replace device and port reported in PW message. 816 * PW message should not be used after this point. 817 */ 818 if (rio_chk_dev_route(rdev, &rdev, &portnum)) { 819 pr_err("RIO: Route trace for %s failed\n", 820 rio_name(rdev)); 821 return -EIO; 822 } 823 pw_msg = NULL; 824 } 825 826 /* For End-point devices processing stops here */ 827 if (!(rdev->pef & RIO_PEF_SWITCH)) 828 return 0; 829 830 if (rdev->phys_efptr == 0) { 831 pr_err("RIO_PW: Bad switch initialization for %s\n", 832 rio_name(rdev)); 833 return 0; 834 } 835 836 /* 837 * Process the port-write notification from switch 838 */ 839 if (rdev->rswitch->em_handle) 840 rdev->rswitch->em_handle(rdev, portnum); 841 842 rio_read_config_32(rdev, 843 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), 844 &err_status); 845 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); 846 847 if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { 848 849 if (!(rdev->rswitch->port_ok & (1 << portnum))) { 850 rdev->rswitch->port_ok |= (1 << portnum); 851 rio_set_port_lockout(rdev, portnum, 0); 852 /* Schedule Insertion Service */ 853 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", 854 rio_name(rdev), portnum); 855 } 856 857 /* Clear error-stopped states (if reported). 858 * Depending on the link partner state, two attempts 859 * may be needed for successful recovery. 860 */ 861 if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | 862 RIO_PORT_N_ERR_STS_PW_INP_ES)) { 863 if (rio_clr_err_stopped(rdev, portnum, err_status)) 864 rio_clr_err_stopped(rdev, portnum, 0); 865 } 866 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ 867 868 if (rdev->rswitch->port_ok & (1 << portnum)) { 869 rdev->rswitch->port_ok &= ~(1 << portnum); 870 rio_set_port_lockout(rdev, portnum, 1); 871 872 rio_write_config_32(rdev, 873 rdev->phys_efptr + 874 RIO_PORT_N_ACK_STS_CSR(portnum), 875 RIO_PORT_N_ACK_CLEAR); 876 877 /* Schedule Extraction Service */ 878 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", 879 rio_name(rdev), portnum); 880 } 881 } 882 883 rio_read_config_32(rdev, 884 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); 885 if (em_perrdet) { 886 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", 887 portnum, em_perrdet); 888 /* Clear EM Port N Error Detect CSR */ 889 rio_write_config_32(rdev, 890 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); 891 } 892 893 rio_read_config_32(rdev, 894 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); 895 if (em_ltlerrdet) { 896 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", 897 em_ltlerrdet); 898 /* Clear EM L/T Layer Error Detect CSR */ 899 rio_write_config_32(rdev, 900 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); 901 } 902 903 /* Clear remaining error bits and Port-Write Pending bit */ 904 rio_write_config_32(rdev, 905 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), 906 err_status); 907 908 return 0; 909 } 910 EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); 911 912 /** 913 * rio_mport_get_efb - get pointer to next extended features block 914 * @port: Master port to issue transaction 915 * @local: Indicate a local master port or remote device access 916 * @destid: Destination ID of the device 917 * @hopcount: Number of switch hops to the device 918 * @from: Offset of current Extended Feature block header (if 0 starts 919 * from ExtFeaturePtr) 920 */ 921 u32 922 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, 923 u8 hopcount, u32 from) 924 { 925 u32 reg_val; 926 927 if (from == 0) { 928 if (local) 929 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, 930 ®_val); 931 else 932 rio_mport_read_config_32(port, destid, hopcount, 933 RIO_ASM_INFO_CAR, ®_val); 934 return reg_val & RIO_EXT_FTR_PTR_MASK; 935 } else { 936 if (local) 937 rio_local_read_config_32(port, from, ®_val); 938 else 939 rio_mport_read_config_32(port, destid, hopcount, 940 from, ®_val); 941 return RIO_GET_BLOCK_ID(reg_val); 942 } 943 } 944 945 /** 946 * rio_mport_get_feature - query for devices' extended features 947 * @port: Master port to issue transaction 948 * @local: Indicate a local master port or remote device access 949 * @destid: Destination ID of the device 950 * @hopcount: Number of switch hops to the device 951 * @ftr: Extended feature code 952 * 953 * Tell if a device supports a given RapidIO capability. 954 * Returns the offset of the requested extended feature 955 * block within the device's RIO configuration space or 956 * 0 in case the device does not support it. Possible 957 * values for @ftr: 958 * 959 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices 960 * 961 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices 962 * 963 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices 964 * 965 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices 966 * 967 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices 968 * 969 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices 970 */ 971 u32 972 rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, 973 u8 hopcount, int ftr) 974 { 975 u32 asm_info, ext_ftr_ptr, ftr_header; 976 977 if (local) 978 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); 979 else 980 rio_mport_read_config_32(port, destid, hopcount, 981 RIO_ASM_INFO_CAR, &asm_info); 982 983 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; 984 985 while (ext_ftr_ptr) { 986 if (local) 987 rio_local_read_config_32(port, ext_ftr_ptr, 988 &ftr_header); 989 else 990 rio_mport_read_config_32(port, destid, hopcount, 991 ext_ftr_ptr, &ftr_header); 992 if (RIO_GET_BLOCK_ID(ftr_header) == ftr) 993 return ext_ftr_ptr; 994 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) 995 break; 996 } 997 998 return 0; 999 } 1000 1001 /** 1002 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did 1003 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids 1004 * @did: RIO did to match or %RIO_ANY_ID to match all dids 1005 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids 1006 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids 1007 * @from: Previous RIO device found in search, or %NULL for new search 1008 * 1009 * Iterates through the list of known RIO devices. If a RIO device is 1010 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference 1011 * count to the device is incrememted and a pointer to its device 1012 * structure is returned. Otherwise, %NULL is returned. A new search 1013 * is initiated by passing %NULL to the @from argument. Otherwise, if 1014 * @from is not %NULL, searches continue from next device on the global 1015 * list. The reference count for @from is always decremented if it is 1016 * not %NULL. 1017 */ 1018 struct rio_dev *rio_get_asm(u16 vid, u16 did, 1019 u16 asm_vid, u16 asm_did, struct rio_dev *from) 1020 { 1021 struct list_head *n; 1022 struct rio_dev *rdev; 1023 1024 WARN_ON(in_interrupt()); 1025 spin_lock(&rio_global_list_lock); 1026 n = from ? from->global_list.next : rio_devices.next; 1027 1028 while (n && (n != &rio_devices)) { 1029 rdev = rio_dev_g(n); 1030 if ((vid == RIO_ANY_ID || rdev->vid == vid) && 1031 (did == RIO_ANY_ID || rdev->did == did) && 1032 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && 1033 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) 1034 goto exit; 1035 n = n->next; 1036 } 1037 rdev = NULL; 1038 exit: 1039 rio_dev_put(from); 1040 rdev = rio_dev_get(rdev); 1041 spin_unlock(&rio_global_list_lock); 1042 return rdev; 1043 } 1044 1045 /** 1046 * rio_get_device - Begin or continue searching for a RIO device by vid/did 1047 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids 1048 * @did: RIO did to match or %RIO_ANY_ID to match all dids 1049 * @from: Previous RIO device found in search, or %NULL for new search 1050 * 1051 * Iterates through the list of known RIO devices. If a RIO device is 1052 * found with a matching @vid and @did, the reference count to the 1053 * device is incrememted and a pointer to its device structure is returned. 1054 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL 1055 * to the @from argument. Otherwise, if @from is not %NULL, searches 1056 * continue from next device on the global list. The reference count for 1057 * @from is always decremented if it is not %NULL. 1058 */ 1059 struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) 1060 { 1061 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); 1062 } 1063 1064 /** 1065 * rio_std_route_add_entry - Add switch route table entry using standard 1066 * registers defined in RIO specification rev.1.3 1067 * @mport: Master port to issue transaction 1068 * @destid: Destination ID of the device 1069 * @hopcount: Number of switch hops to the device 1070 * @table: routing table ID (global or port-specific) 1071 * @route_destid: destID entry in the RT 1072 * @route_port: destination port for specified destID 1073 */ 1074 int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, 1075 u16 table, u16 route_destid, u8 route_port) 1076 { 1077 if (table == RIO_GLOBAL_TABLE) { 1078 rio_mport_write_config_32(mport, destid, hopcount, 1079 RIO_STD_RTE_CONF_DESTID_SEL_CSR, 1080 (u32)route_destid); 1081 rio_mport_write_config_32(mport, destid, hopcount, 1082 RIO_STD_RTE_CONF_PORT_SEL_CSR, 1083 (u32)route_port); 1084 } 1085 1086 udelay(10); 1087 return 0; 1088 } 1089 1090 /** 1091 * rio_std_route_get_entry - Read switch route table entry (port number) 1092 * associated with specified destID using standard registers defined in RIO 1093 * specification rev.1.3 1094 * @mport: Master port to issue transaction 1095 * @destid: Destination ID of the device 1096 * @hopcount: Number of switch hops to the device 1097 * @table: routing table ID (global or port-specific) 1098 * @route_destid: destID entry in the RT 1099 * @route_port: returned destination port for specified destID 1100 */ 1101 int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, 1102 u16 table, u16 route_destid, u8 *route_port) 1103 { 1104 u32 result; 1105 1106 if (table == RIO_GLOBAL_TABLE) { 1107 rio_mport_write_config_32(mport, destid, hopcount, 1108 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); 1109 rio_mport_read_config_32(mport, destid, hopcount, 1110 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); 1111 1112 *route_port = (u8)result; 1113 } 1114 1115 return 0; 1116 } 1117 1118 /** 1119 * rio_std_route_clr_table - Clear swotch route table using standard registers 1120 * defined in RIO specification rev.1.3. 1121 * @mport: Master port to issue transaction 1122 * @destid: Destination ID of the device 1123 * @hopcount: Number of switch hops to the device 1124 * @table: routing table ID (global or port-specific) 1125 */ 1126 int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, 1127 u16 table) 1128 { 1129 u32 max_destid = 0xff; 1130 u32 i, pef, id_inc = 1, ext_cfg = 0; 1131 u32 port_sel = RIO_INVALID_ROUTE; 1132 1133 if (table == RIO_GLOBAL_TABLE) { 1134 rio_mport_read_config_32(mport, destid, hopcount, 1135 RIO_PEF_CAR, &pef); 1136 1137 if (mport->sys_size) { 1138 rio_mport_read_config_32(mport, destid, hopcount, 1139 RIO_SWITCH_RT_LIMIT, 1140 &max_destid); 1141 max_destid &= RIO_RT_MAX_DESTID; 1142 } 1143 1144 if (pef & RIO_PEF_EXT_RT) { 1145 ext_cfg = 0x80000000; 1146 id_inc = 4; 1147 port_sel = (RIO_INVALID_ROUTE << 24) | 1148 (RIO_INVALID_ROUTE << 16) | 1149 (RIO_INVALID_ROUTE << 8) | 1150 RIO_INVALID_ROUTE; 1151 } 1152 1153 for (i = 0; i <= max_destid;) { 1154 rio_mport_write_config_32(mport, destid, hopcount, 1155 RIO_STD_RTE_CONF_DESTID_SEL_CSR, 1156 ext_cfg | i); 1157 rio_mport_write_config_32(mport, destid, hopcount, 1158 RIO_STD_RTE_CONF_PORT_SEL_CSR, 1159 port_sel); 1160 i += id_inc; 1161 } 1162 } 1163 1164 udelay(10); 1165 return 0; 1166 } 1167 1168 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 1169 1170 static bool rio_chan_filter(struct dma_chan *chan, void *arg) 1171 { 1172 struct rio_dev *rdev = arg; 1173 1174 /* Check that DMA device belongs to the right MPORT */ 1175 return (rdev->net->hport == 1176 container_of(chan->device, struct rio_mport, dma)); 1177 } 1178 1179 /** 1180 * rio_request_dma - request RapidIO capable DMA channel that supports 1181 * specified target RapidIO device. 1182 * @rdev: RIO device control structure 1183 * 1184 * Returns pointer to allocated DMA channel or NULL if failed. 1185 */ 1186 struct dma_chan *rio_request_dma(struct rio_dev *rdev) 1187 { 1188 dma_cap_mask_t mask; 1189 struct dma_chan *dchan; 1190 1191 dma_cap_zero(mask); 1192 dma_cap_set(DMA_SLAVE, mask); 1193 dchan = dma_request_channel(mask, rio_chan_filter, rdev); 1194 1195 return dchan; 1196 } 1197 EXPORT_SYMBOL_GPL(rio_request_dma); 1198 1199 /** 1200 * rio_release_dma - release specified DMA channel 1201 * @dchan: DMA channel to release 1202 */ 1203 void rio_release_dma(struct dma_chan *dchan) 1204 { 1205 dma_release_channel(dchan); 1206 } 1207 EXPORT_SYMBOL_GPL(rio_release_dma); 1208 1209 /** 1210 * rio_dma_prep_slave_sg - RapidIO specific wrapper 1211 * for device_prep_slave_sg callback defined by DMAENGINE. 1212 * @rdev: RIO device control structure 1213 * @dchan: DMA channel to configure 1214 * @data: RIO specific data descriptor 1215 * @direction: DMA data transfer direction (TO or FROM the device) 1216 * @flags: dmaengine defined flags 1217 * 1218 * Initializes RapidIO capable DMA channel for the specified data transfer. 1219 * Uses DMA channel private extension to pass information related to remote 1220 * target RIO device. 1221 * Returns pointer to DMA transaction descriptor or NULL if failed. 1222 */ 1223 struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, 1224 struct dma_chan *dchan, struct rio_dma_data *data, 1225 enum dma_transfer_direction direction, unsigned long flags) 1226 { 1227 struct dma_async_tx_descriptor *txd = NULL; 1228 struct rio_dma_ext rio_ext; 1229 1230 if (dchan->device->device_prep_slave_sg == NULL) { 1231 pr_err("%s: prep_rio_sg == NULL\n", __func__); 1232 return NULL; 1233 } 1234 1235 rio_ext.destid = rdev->destid; 1236 rio_ext.rio_addr_u = data->rio_addr_u; 1237 rio_ext.rio_addr = data->rio_addr; 1238 rio_ext.wr_type = data->wr_type; 1239 1240 txd = dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, 1241 direction, flags, &rio_ext); 1242 1243 return txd; 1244 } 1245 EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); 1246 1247 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ 1248 1249 static void rio_fixup_device(struct rio_dev *dev) 1250 { 1251 } 1252 1253 static int rio_init(void) 1254 { 1255 struct rio_dev *dev = NULL; 1256 1257 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { 1258 rio_fixup_device(dev); 1259 } 1260 return 0; 1261 } 1262 1263 static struct workqueue_struct *rio_wq; 1264 1265 struct rio_disc_work { 1266 struct work_struct work; 1267 struct rio_mport *mport; 1268 }; 1269 1270 static void disc_work_handler(struct work_struct *_work) 1271 { 1272 struct rio_disc_work *work; 1273 1274 work = container_of(_work, struct rio_disc_work, work); 1275 pr_debug("RIO: discovery work for mport %d %s\n", 1276 work->mport->id, work->mport->name); 1277 rio_disc_mport(work->mport); 1278 } 1279 1280 int rio_init_mports(void) 1281 { 1282 struct rio_mport *port; 1283 struct rio_disc_work *work; 1284 int n = 0; 1285 1286 if (!next_portid) 1287 return -ENODEV; 1288 1289 /* 1290 * First, run enumerations and check if we need to perform discovery 1291 * on any of the registered mports. 1292 */ 1293 list_for_each_entry(port, &rio_mports, node) { 1294 if (port->host_deviceid >= 0) 1295 rio_enum_mport(port); 1296 else 1297 n++; 1298 } 1299 1300 if (!n) 1301 goto no_disc; 1302 1303 /* 1304 * If we have mports that require discovery schedule a discovery work 1305 * for each of them. If the code below fails to allocate needed 1306 * resources, exit without error to keep results of enumeration 1307 * process (if any). 1308 * TODO: Implement restart of dicovery process for all or 1309 * individual discovering mports. 1310 */ 1311 rio_wq = alloc_workqueue("riodisc", 0, 0); 1312 if (!rio_wq) { 1313 pr_err("RIO: unable allocate rio_wq\n"); 1314 goto no_disc; 1315 } 1316 1317 work = kcalloc(n, sizeof *work, GFP_KERNEL); 1318 if (!work) { 1319 pr_err("RIO: no memory for work struct\n"); 1320 destroy_workqueue(rio_wq); 1321 goto no_disc; 1322 } 1323 1324 n = 0; 1325 list_for_each_entry(port, &rio_mports, node) { 1326 if (port->host_deviceid < 0) { 1327 work[n].mport = port; 1328 INIT_WORK(&work[n].work, disc_work_handler); 1329 queue_work(rio_wq, &work[n].work); 1330 n++; 1331 } 1332 } 1333 1334 flush_workqueue(rio_wq); 1335 pr_debug("RIO: destroy discovery workqueue\n"); 1336 destroy_workqueue(rio_wq); 1337 kfree(work); 1338 1339 no_disc: 1340 rio_init(); 1341 1342 return 0; 1343 } 1344 1345 device_initcall_sync(rio_init_mports); 1346 1347 static int hdids[RIO_MAX_MPORTS + 1]; 1348 1349 static int rio_get_hdid(int index) 1350 { 1351 if (!hdids[0] || hdids[0] <= index || index >= RIO_MAX_MPORTS) 1352 return -1; 1353 1354 return hdids[index + 1]; 1355 } 1356 1357 static int rio_hdid_setup(char *str) 1358 { 1359 (void)get_options(str, ARRAY_SIZE(hdids), hdids); 1360 return 1; 1361 } 1362 1363 __setup("riohdid=", rio_hdid_setup); 1364 1365 int rio_register_mport(struct rio_mport *port) 1366 { 1367 if (next_portid >= RIO_MAX_MPORTS) { 1368 pr_err("RIO: reached specified max number of mports\n"); 1369 return 1; 1370 } 1371 1372 port->id = next_portid++; 1373 port->host_deviceid = rio_get_hdid(port->id); 1374 list_add_tail(&port->node, &rio_mports); 1375 return 0; 1376 } 1377 1378 EXPORT_SYMBOL_GPL(rio_local_get_device_id); 1379 EXPORT_SYMBOL_GPL(rio_get_device); 1380 EXPORT_SYMBOL_GPL(rio_get_asm); 1381 EXPORT_SYMBOL_GPL(rio_request_inb_dbell); 1382 EXPORT_SYMBOL_GPL(rio_release_inb_dbell); 1383 EXPORT_SYMBOL_GPL(rio_request_outb_dbell); 1384 EXPORT_SYMBOL_GPL(rio_release_outb_dbell); 1385 EXPORT_SYMBOL_GPL(rio_request_inb_mbox); 1386 EXPORT_SYMBOL_GPL(rio_release_inb_mbox); 1387 EXPORT_SYMBOL_GPL(rio_request_outb_mbox); 1388 EXPORT_SYMBOL_GPL(rio_release_outb_mbox); 1389