Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/src/linux_pci.c
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1 /*- 2 * Copyright (c) 2015-2016 Mellanox Technologies, Ltd. 3 * All rights reserved. 4 * Copyright (c) 2020-2022 The FreeBSD Foundation 5 * 6 * Portions of this software were developed by Björn Zeeb 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/sysctl.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/fcntl.h> 43 #include <sys/file.h> 44 #include <sys/filio.h> 45 #include <sys/pciio.h> 46 #include <sys/pctrie.h> 47 #include <sys/rwlock.h> 48 49 #include <vm/vm.h> 50 #include <vm/pmap.h> 51 52 #include <machine/stdarg.h> 53 54 #include <dev/pci/pcivar.h> 55 #include <dev/pci/pci_private.h> 56 #include <dev/pci/pci_iov.h> 57 #include <dev/backlight/backlight.h> 58 59 #include <linux/kernel.h> 60 #include <linux/kobject.h> 61 #include <linux/device.h> 62 #include <linux/slab.h> 63 #include <linux/module.h> 64 #include <linux/cdev.h> 65 #include <linux/file.h> 66 #include <linux/sysfs.h> 67 #include <linux/mm.h> 68 #include <linux/io.h> 69 #include <linux/vmalloc.h> 70 #include <linux/pci.h> 71 #include <linux/compat.h> 72 73 #include <linux/backlight.h> 74 75 #include "backlight_if.h" 76 #include "pcib_if.h" 77 78 /* Undef the linux function macro defined in linux/pci.h */ 79 #undef pci_get_class 80 81 extern int linuxkpi_debug; 82 83 SYSCTL_DECL(_compat_linuxkpi); 84 85 static counter_u64_t lkpi_pci_nseg1_fail; 86 SYSCTL_COUNTER_U64(_compat_linuxkpi, OID_AUTO, lkpi_pci_nseg1_fail, CTLFLAG_RD, 87 &lkpi_pci_nseg1_fail, "Count of busdma mapping failures of single-segment"); 88 89 static device_probe_t linux_pci_probe; 90 static device_attach_t linux_pci_attach; 91 static device_detach_t linux_pci_detach; 92 static device_suspend_t linux_pci_suspend; 93 static device_resume_t linux_pci_resume; 94 static device_shutdown_t linux_pci_shutdown; 95 static pci_iov_init_t linux_pci_iov_init; 96 static pci_iov_uninit_t linux_pci_iov_uninit; 97 static pci_iov_add_vf_t linux_pci_iov_add_vf; 98 static int linux_backlight_get_status(device_t dev, struct backlight_props *props); 99 static int linux_backlight_update_status(device_t dev, struct backlight_props *props); 100 static int linux_backlight_get_info(device_t dev, struct backlight_info *info); 101 102 static device_method_t pci_methods[] = { 103 DEVMETHOD(device_probe, linux_pci_probe), 104 DEVMETHOD(device_attach, linux_pci_attach), 105 DEVMETHOD(device_detach, linux_pci_detach), 106 DEVMETHOD(device_suspend, linux_pci_suspend), 107 DEVMETHOD(device_resume, linux_pci_resume), 108 DEVMETHOD(device_shutdown, linux_pci_shutdown), 109 DEVMETHOD(pci_iov_init, linux_pci_iov_init), 110 DEVMETHOD(pci_iov_uninit, linux_pci_iov_uninit), 111 DEVMETHOD(pci_iov_add_vf, linux_pci_iov_add_vf), 112 113 /* backlight interface */ 114 DEVMETHOD(backlight_update_status, linux_backlight_update_status), 115 DEVMETHOD(backlight_get_status, linux_backlight_get_status), 116 DEVMETHOD(backlight_get_info, linux_backlight_get_info), 117 DEVMETHOD_END 118 }; 119 120 const char *pci_power_names[] = { 121 "UNKNOWN", "D0", "D1", "D2", "D3hot", "D3cold" 122 }; 123 124 struct linux_dma_priv { 125 uint64_t dma_mask; 126 bus_dma_tag_t dmat; 127 uint64_t dma_coherent_mask; 128 bus_dma_tag_t dmat_coherent; 129 struct mtx lock; 130 struct pctrie ptree; 131 }; 132 #define DMA_PRIV_LOCK(priv) mtx_lock(&(priv)->lock) 133 #define DMA_PRIV_UNLOCK(priv) mtx_unlock(&(priv)->lock) 134 135 static int 136 linux_pdev_dma_uninit(struct pci_dev *pdev) 137 { 138 struct linux_dma_priv *priv; 139 140 priv = pdev->dev.dma_priv; 141 if (priv->dmat) 142 bus_dma_tag_destroy(priv->dmat); 143 if (priv->dmat_coherent) 144 bus_dma_tag_destroy(priv->dmat_coherent); 145 mtx_destroy(&priv->lock); 146 pdev->dev.dma_priv = NULL; 147 free(priv, M_DEVBUF); 148 return (0); 149 } 150 151 static int 152 linux_pdev_dma_init(struct pci_dev *pdev) 153 { 154 struct linux_dma_priv *priv; 155 int error; 156 157 priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO); 158 159 mtx_init(&priv->lock, "lkpi-priv-dma", NULL, MTX_DEF); 160 pctrie_init(&priv->ptree); 161 162 pdev->dev.dma_priv = priv; 163 164 /* Create a default DMA tags. */ 165 error = linux_dma_tag_init(&pdev->dev, DMA_BIT_MASK(64)); 166 if (error != 0) 167 goto err; 168 /* Coherent is lower 32bit only by default in Linux. */ 169 error = linux_dma_tag_init_coherent(&pdev->dev, DMA_BIT_MASK(32)); 170 if (error != 0) 171 goto err; 172 173 return (error); 174 175 err: 176 linux_pdev_dma_uninit(pdev); 177 return (error); 178 } 179 180 int 181 linux_dma_tag_init(struct device *dev, u64 dma_mask) 182 { 183 struct linux_dma_priv *priv; 184 int error; 185 186 priv = dev->dma_priv; 187 188 if (priv->dmat) { 189 if (priv->dma_mask == dma_mask) 190 return (0); 191 192 bus_dma_tag_destroy(priv->dmat); 193 } 194 195 priv->dma_mask = dma_mask; 196 197 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 198 1, 0, /* alignment, boundary */ 199 dma_mask, /* lowaddr */ 200 BUS_SPACE_MAXADDR, /* highaddr */ 201 NULL, NULL, /* filtfunc, filtfuncarg */ 202 BUS_SPACE_MAXSIZE, /* maxsize */ 203 1, /* nsegments */ 204 BUS_SPACE_MAXSIZE, /* maxsegsz */ 205 0, /* flags */ 206 NULL, NULL, /* lockfunc, lockfuncarg */ 207 &priv->dmat); 208 return (-error); 209 } 210 211 int 212 linux_dma_tag_init_coherent(struct device *dev, u64 dma_mask) 213 { 214 struct linux_dma_priv *priv; 215 int error; 216 217 priv = dev->dma_priv; 218 219 if (priv->dmat_coherent) { 220 if (priv->dma_coherent_mask == dma_mask) 221 return (0); 222 223 bus_dma_tag_destroy(priv->dmat_coherent); 224 } 225 226 priv->dma_coherent_mask = dma_mask; 227 228 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 229 1, 0, /* alignment, boundary */ 230 dma_mask, /* lowaddr */ 231 BUS_SPACE_MAXADDR, /* highaddr */ 232 NULL, NULL, /* filtfunc, filtfuncarg */ 233 BUS_SPACE_MAXSIZE, /* maxsize */ 234 1, /* nsegments */ 235 BUS_SPACE_MAXSIZE, /* maxsegsz */ 236 0, /* flags */ 237 NULL, NULL, /* lockfunc, lockfuncarg */ 238 &priv->dmat_coherent); 239 return (-error); 240 } 241 242 static struct pci_driver * 243 linux_pci_find(device_t dev, const struct pci_device_id **idp) 244 { 245 const struct pci_device_id *id; 246 struct pci_driver *pdrv; 247 uint16_t vendor; 248 uint16_t device; 249 uint16_t subvendor; 250 uint16_t subdevice; 251 252 vendor = pci_get_vendor(dev); 253 device = pci_get_device(dev); 254 subvendor = pci_get_subvendor(dev); 255 subdevice = pci_get_subdevice(dev); 256 257 spin_lock(&pci_lock); 258 list_for_each_entry(pdrv, &pci_drivers, node) { 259 for (id = pdrv->id_table; id->vendor != 0; id++) { 260 if (vendor == id->vendor && 261 (PCI_ANY_ID == id->device || device == id->device) && 262 (PCI_ANY_ID == id->subvendor || subvendor == id->subvendor) && 263 (PCI_ANY_ID == id->subdevice || subdevice == id->subdevice)) { 264 *idp = id; 265 spin_unlock(&pci_lock); 266 return (pdrv); 267 } 268 } 269 } 270 spin_unlock(&pci_lock); 271 return (NULL); 272 } 273 274 struct pci_dev * 275 lkpi_pci_get_device(uint16_t vendor, uint16_t device, struct pci_dev *odev) 276 { 277 struct pci_dev *pdev; 278 279 KASSERT(odev == NULL, ("%s: odev argument not yet supported\n", __func__)); 280 281 spin_lock(&pci_lock); 282 list_for_each_entry(pdev, &pci_devices, links) { 283 if (pdev->vendor == vendor && pdev->device == device) 284 break; 285 } 286 spin_unlock(&pci_lock); 287 288 return (pdev); 289 } 290 291 static void 292 lkpi_pci_dev_release(struct device *dev) 293 { 294 295 lkpi_devres_release_free_list(dev); 296 spin_lock_destroy(&dev->devres_lock); 297 } 298 299 static void 300 lkpifill_pci_dev(device_t dev, struct pci_dev *pdev) 301 { 302 303 pdev->devfn = PCI_DEVFN(pci_get_slot(dev), pci_get_function(dev)); 304 pdev->vendor = pci_get_vendor(dev); 305 pdev->device = pci_get_device(dev); 306 pdev->subsystem_vendor = pci_get_subvendor(dev); 307 pdev->subsystem_device = pci_get_subdevice(dev); 308 pdev->class = pci_get_class(dev); 309 pdev->revision = pci_get_revid(dev); 310 pdev->bus = malloc(sizeof(*pdev->bus), M_DEVBUF, M_WAITOK | M_ZERO); 311 /* 312 * This should be the upstream bridge; pci_upstream_bridge() 313 * handles that case on demand as otherwise we'll shadow the 314 * entire PCI hierarchy. 315 */ 316 pdev->bus->self = pdev; 317 pdev->bus->number = pci_get_bus(dev); 318 pdev->bus->domain = pci_get_domain(dev); 319 pdev->dev.bsddev = dev; 320 pdev->dev.parent = &linux_root_device; 321 pdev->dev.release = lkpi_pci_dev_release; 322 INIT_LIST_HEAD(&pdev->dev.irqents); 323 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 324 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 325 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 326 kobject_name(&pdev->dev.kobj)); 327 spin_lock_init(&pdev->dev.devres_lock); 328 INIT_LIST_HEAD(&pdev->dev.devres_head); 329 } 330 331 static void 332 lkpinew_pci_dev_release(struct device *dev) 333 { 334 struct pci_dev *pdev; 335 336 pdev = to_pci_dev(dev); 337 if (pdev->root != NULL) 338 pci_dev_put(pdev->root); 339 if (pdev->bus->self != pdev) 340 pci_dev_put(pdev->bus->self); 341 free(pdev->bus, M_DEVBUF); 342 if (pdev->msi_desc != NULL) 343 free(pdev->msi_desc, M_DEVBUF); 344 free(pdev, M_DEVBUF); 345 } 346 347 struct pci_dev * 348 lkpinew_pci_dev(device_t dev) 349 { 350 struct pci_dev *pdev; 351 352 pdev = malloc(sizeof(*pdev), M_DEVBUF, M_WAITOK|M_ZERO); 353 lkpifill_pci_dev(dev, pdev); 354 pdev->dev.release = lkpinew_pci_dev_release; 355 356 return (pdev); 357 } 358 359 struct pci_dev * 360 lkpi_pci_get_class(unsigned int class, struct pci_dev *from) 361 { 362 device_t dev; 363 device_t devfrom = NULL; 364 struct pci_dev *pdev; 365 366 if (from != NULL) 367 devfrom = from->dev.bsddev; 368 369 dev = pci_find_class_from(class >> 16, (class >> 8) & 0xFF, devfrom); 370 if (dev == NULL) 371 return (NULL); 372 373 pdev = lkpinew_pci_dev(dev); 374 return (pdev); 375 } 376 377 struct pci_dev * 378 lkpi_pci_get_domain_bus_and_slot(int domain, unsigned int bus, 379 unsigned int devfn) 380 { 381 device_t dev; 382 struct pci_dev *pdev; 383 384 dev = pci_find_dbsf(domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); 385 if (dev == NULL) 386 return (NULL); 387 388 pdev = lkpinew_pci_dev(dev); 389 return (pdev); 390 } 391 392 static int 393 linux_pci_probe(device_t dev) 394 { 395 const struct pci_device_id *id; 396 struct pci_driver *pdrv; 397 398 if ((pdrv = linux_pci_find(dev, &id)) == NULL) 399 return (ENXIO); 400 if (device_get_driver(dev) != &pdrv->bsddriver) 401 return (ENXIO); 402 device_set_desc(dev, pdrv->name); 403 404 /* Assume BSS initialized (should never return BUS_PROBE_SPECIFIC). */ 405 if (pdrv->bsd_probe_return == 0) 406 return (BUS_PROBE_DEFAULT); 407 else 408 return (pdrv->bsd_probe_return); 409 } 410 411 static int 412 linux_pci_attach(device_t dev) 413 { 414 const struct pci_device_id *id; 415 struct pci_driver *pdrv; 416 struct pci_dev *pdev; 417 418 pdrv = linux_pci_find(dev, &id); 419 pdev = device_get_softc(dev); 420 421 MPASS(pdrv != NULL); 422 MPASS(pdev != NULL); 423 424 return (linux_pci_attach_device(dev, pdrv, id, pdev)); 425 } 426 427 int 428 linux_pci_attach_device(device_t dev, struct pci_driver *pdrv, 429 const struct pci_device_id *id, struct pci_dev *pdev) 430 { 431 struct resource_list_entry *rle; 432 device_t parent; 433 uintptr_t rid; 434 int error; 435 bool isdrm; 436 437 linux_set_current(curthread); 438 439 parent = device_get_parent(dev); 440 isdrm = pdrv != NULL && pdrv->isdrm; 441 442 if (isdrm) { 443 struct pci_devinfo *dinfo; 444 445 dinfo = device_get_ivars(parent); 446 device_set_ivars(dev, dinfo); 447 } 448 449 lkpifill_pci_dev(dev, pdev); 450 if (isdrm) 451 PCI_GET_ID(device_get_parent(parent), parent, PCI_ID_RID, &rid); 452 else 453 PCI_GET_ID(parent, dev, PCI_ID_RID, &rid); 454 pdev->devfn = rid; 455 pdev->pdrv = pdrv; 456 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0, false); 457 if (rle != NULL) 458 pdev->dev.irq = rle->start; 459 else 460 pdev->dev.irq = LINUX_IRQ_INVALID; 461 pdev->irq = pdev->dev.irq; 462 error = linux_pdev_dma_init(pdev); 463 if (error) 464 goto out_dma_init; 465 466 TAILQ_INIT(&pdev->mmio); 467 468 spin_lock(&pci_lock); 469 list_add(&pdev->links, &pci_devices); 470 spin_unlock(&pci_lock); 471 472 if (pdrv != NULL) { 473 error = pdrv->probe(pdev, id); 474 if (error) 475 goto out_probe; 476 } 477 return (0); 478 479 out_probe: 480 free(pdev->bus, M_DEVBUF); 481 linux_pdev_dma_uninit(pdev); 482 out_dma_init: 483 spin_lock(&pci_lock); 484 list_del(&pdev->links); 485 spin_unlock(&pci_lock); 486 put_device(&pdev->dev); 487 return (-error); 488 } 489 490 static int 491 linux_pci_detach(device_t dev) 492 { 493 struct pci_dev *pdev; 494 495 pdev = device_get_softc(dev); 496 497 MPASS(pdev != NULL); 498 499 device_set_desc(dev, NULL); 500 501 return (linux_pci_detach_device(pdev)); 502 } 503 504 int 505 linux_pci_detach_device(struct pci_dev *pdev) 506 { 507 508 linux_set_current(curthread); 509 510 if (pdev->pdrv != NULL) 511 pdev->pdrv->remove(pdev); 512 513 if (pdev->root != NULL) 514 pci_dev_put(pdev->root); 515 free(pdev->bus, M_DEVBUF); 516 linux_pdev_dma_uninit(pdev); 517 518 spin_lock(&pci_lock); 519 list_del(&pdev->links); 520 spin_unlock(&pci_lock); 521 put_device(&pdev->dev); 522 523 return (0); 524 } 525 526 static int 527 lkpi_pci_disable_dev(struct device *dev) 528 { 529 530 (void) pci_disable_io(dev->bsddev, SYS_RES_MEMORY); 531 (void) pci_disable_io(dev->bsddev, SYS_RES_IOPORT); 532 return (0); 533 } 534 535 struct pci_devres * 536 lkpi_pci_devres_get_alloc(struct pci_dev *pdev) 537 { 538 struct pci_devres *dr; 539 540 dr = lkpi_devres_find(&pdev->dev, lkpi_pci_devres_release, NULL, NULL); 541 if (dr == NULL) { 542 dr = lkpi_devres_alloc(lkpi_pci_devres_release, sizeof(*dr), 543 GFP_KERNEL | __GFP_ZERO); 544 if (dr != NULL) 545 lkpi_devres_add(&pdev->dev, dr); 546 } 547 548 return (dr); 549 } 550 551 void 552 lkpi_pci_devres_release(struct device *dev, void *p) 553 { 554 struct pci_devres *dr; 555 struct pci_dev *pdev; 556 int bar; 557 558 pdev = to_pci_dev(dev); 559 dr = p; 560 561 if (pdev->msix_enabled) 562 lkpi_pci_disable_msix(pdev); 563 if (pdev->msi_enabled) 564 lkpi_pci_disable_msi(pdev); 565 566 if (dr->enable_io && lkpi_pci_disable_dev(dev) == 0) 567 dr->enable_io = false; 568 569 if (dr->region_mask == 0) 570 return; 571 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) { 572 573 if ((dr->region_mask & (1 << bar)) == 0) 574 continue; 575 pci_release_region(pdev, bar); 576 } 577 } 578 579 struct pcim_iomap_devres * 580 lkpi_pcim_iomap_devres_find(struct pci_dev *pdev) 581 { 582 struct pcim_iomap_devres *dr; 583 584 dr = lkpi_devres_find(&pdev->dev, lkpi_pcim_iomap_table_release, 585 NULL, NULL); 586 if (dr == NULL) { 587 dr = lkpi_devres_alloc(lkpi_pcim_iomap_table_release, 588 sizeof(*dr), GFP_KERNEL | __GFP_ZERO); 589 if (dr != NULL) 590 lkpi_devres_add(&pdev->dev, dr); 591 } 592 593 if (dr == NULL) 594 device_printf(pdev->dev.bsddev, "%s: NULL\n", __func__); 595 596 return (dr); 597 } 598 599 void 600 lkpi_pcim_iomap_table_release(struct device *dev, void *p) 601 { 602 struct pcim_iomap_devres *dr; 603 struct pci_dev *pdev; 604 int bar; 605 606 dr = p; 607 pdev = to_pci_dev(dev); 608 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) { 609 610 if (dr->mmio_table[bar] == NULL) 611 continue; 612 613 pci_iounmap(pdev, dr->mmio_table[bar]); 614 } 615 } 616 617 static int 618 linux_pci_suspend(device_t dev) 619 { 620 const struct dev_pm_ops *pmops; 621 struct pm_message pm = { }; 622 struct pci_dev *pdev; 623 int error; 624 625 error = 0; 626 linux_set_current(curthread); 627 pdev = device_get_softc(dev); 628 pmops = pdev->pdrv->driver.pm; 629 630 if (pdev->pdrv->suspend != NULL) 631 error = -pdev->pdrv->suspend(pdev, pm); 632 else if (pmops != NULL && pmops->suspend != NULL) { 633 error = -pmops->suspend(&pdev->dev); 634 if (error == 0 && pmops->suspend_late != NULL) 635 error = -pmops->suspend_late(&pdev->dev); 636 } 637 return (error); 638 } 639 640 static int 641 linux_pci_resume(device_t dev) 642 { 643 const struct dev_pm_ops *pmops; 644 struct pci_dev *pdev; 645 int error; 646 647 error = 0; 648 linux_set_current(curthread); 649 pdev = device_get_softc(dev); 650 pmops = pdev->pdrv->driver.pm; 651 652 if (pdev->pdrv->resume != NULL) 653 error = -pdev->pdrv->resume(pdev); 654 else if (pmops != NULL && pmops->resume != NULL) { 655 if (pmops->resume_early != NULL) 656 error = -pmops->resume_early(&pdev->dev); 657 if (error == 0 && pmops->resume != NULL) 658 error = -pmops->resume(&pdev->dev); 659 } 660 return (error); 661 } 662 663 static int 664 linux_pci_shutdown(device_t dev) 665 { 666 struct pci_dev *pdev; 667 668 linux_set_current(curthread); 669 pdev = device_get_softc(dev); 670 if (pdev->pdrv->shutdown != NULL) 671 pdev->pdrv->shutdown(pdev); 672 return (0); 673 } 674 675 static int 676 linux_pci_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *pf_config) 677 { 678 struct pci_dev *pdev; 679 int error; 680 681 linux_set_current(curthread); 682 pdev = device_get_softc(dev); 683 if (pdev->pdrv->bsd_iov_init != NULL) 684 error = pdev->pdrv->bsd_iov_init(dev, num_vfs, pf_config); 685 else 686 error = EINVAL; 687 return (error); 688 } 689 690 static void 691 linux_pci_iov_uninit(device_t dev) 692 { 693 struct pci_dev *pdev; 694 695 linux_set_current(curthread); 696 pdev = device_get_softc(dev); 697 if (pdev->pdrv->bsd_iov_uninit != NULL) 698 pdev->pdrv->bsd_iov_uninit(dev); 699 } 700 701 static int 702 linux_pci_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *vf_config) 703 { 704 struct pci_dev *pdev; 705 int error; 706 707 linux_set_current(curthread); 708 pdev = device_get_softc(dev); 709 if (pdev->pdrv->bsd_iov_add_vf != NULL) 710 error = pdev->pdrv->bsd_iov_add_vf(dev, vfnum, vf_config); 711 else 712 error = EINVAL; 713 return (error); 714 } 715 716 static int 717 _linux_pci_register_driver(struct pci_driver *pdrv, devclass_t dc) 718 { 719 int error; 720 721 linux_set_current(curthread); 722 spin_lock(&pci_lock); 723 list_add(&pdrv->node, &pci_drivers); 724 spin_unlock(&pci_lock); 725 if (pdrv->bsddriver.name == NULL) 726 pdrv->bsddriver.name = pdrv->name; 727 pdrv->bsddriver.methods = pci_methods; 728 pdrv->bsddriver.size = sizeof(struct pci_dev); 729 730 bus_topo_lock(); 731 error = devclass_add_driver(dc, &pdrv->bsddriver, 732 BUS_PASS_DEFAULT, &pdrv->bsdclass); 733 bus_topo_unlock(); 734 return (-error); 735 } 736 737 int 738 linux_pci_register_driver(struct pci_driver *pdrv) 739 { 740 devclass_t dc; 741 742 dc = devclass_find("pci"); 743 if (dc == NULL) 744 return (-ENXIO); 745 pdrv->isdrm = false; 746 return (_linux_pci_register_driver(pdrv, dc)); 747 } 748 749 struct resource_list_entry * 750 linux_pci_reserve_bar(struct pci_dev *pdev, struct resource_list *rl, 751 int type, int rid) 752 { 753 device_t dev; 754 struct resource *res; 755 756 KASSERT(type == SYS_RES_IOPORT || type == SYS_RES_MEMORY, 757 ("trying to reserve non-BAR type %d", type)); 758 759 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ? 760 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev; 761 res = pci_reserve_map(device_get_parent(dev), dev, type, &rid, 0, ~0, 762 1, 1, 0); 763 if (res == NULL) 764 return (NULL); 765 return (resource_list_find(rl, type, rid)); 766 } 767 768 unsigned long 769 pci_resource_start(struct pci_dev *pdev, int bar) 770 { 771 struct resource_list_entry *rle; 772 rman_res_t newstart; 773 device_t dev; 774 int error; 775 776 if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL) 777 return (0); 778 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ? 779 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev; 780 error = bus_translate_resource(dev, rle->type, rle->start, &newstart); 781 if (error != 0) { 782 device_printf(pdev->dev.bsddev, 783 "translate of %#jx failed: %d\n", 784 (uintmax_t)rle->start, error); 785 return (0); 786 } 787 return (newstart); 788 } 789 790 unsigned long 791 pci_resource_len(struct pci_dev *pdev, int bar) 792 { 793 struct resource_list_entry *rle; 794 795 if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL) 796 return (0); 797 return (rle->count); 798 } 799 800 int 801 pci_request_region(struct pci_dev *pdev, int bar, const char *res_name) 802 { 803 struct resource *res; 804 struct pci_devres *dr; 805 struct pci_mmio_region *mmio; 806 int rid; 807 int type; 808 809 type = pci_resource_type(pdev, bar); 810 if (type < 0) 811 return (-ENODEV); 812 rid = PCIR_BAR(bar); 813 res = bus_alloc_resource_any(pdev->dev.bsddev, type, &rid, 814 RF_ACTIVE|RF_SHAREABLE); 815 if (res == NULL) { 816 device_printf(pdev->dev.bsddev, "%s: failed to alloc " 817 "bar %d type %d rid %d\n", 818 __func__, bar, type, PCIR_BAR(bar)); 819 return (-ENODEV); 820 } 821 822 /* 823 * It seems there is an implicit devres tracking on these if the device 824 * is managed; otherwise the resources are not automatiaclly freed on 825 * FreeBSD/LinuxKPI tough they should be/are expected to be by Linux 826 * drivers. 827 */ 828 dr = lkpi_pci_devres_find(pdev); 829 if (dr != NULL) { 830 dr->region_mask |= (1 << bar); 831 dr->region_table[bar] = res; 832 } 833 834 /* Even if the device is not managed we need to track it for iomap. */ 835 mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO); 836 mmio->rid = PCIR_BAR(bar); 837 mmio->type = type; 838 mmio->res = res; 839 TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next); 840 841 return (0); 842 } 843 844 struct resource * 845 _lkpi_pci_iomap(struct pci_dev *pdev, int bar, int mmio_size __unused) 846 { 847 struct pci_mmio_region *mmio, *p; 848 int type; 849 850 type = pci_resource_type(pdev, bar); 851 if (type < 0) { 852 device_printf(pdev->dev.bsddev, "%s: bar %d type %d\n", 853 __func__, bar, type); 854 return (NULL); 855 } 856 857 /* 858 * Check for duplicate mappings. 859 * This can happen if a driver calls pci_request_region() first. 860 */ 861 TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) { 862 if (mmio->type == type && mmio->rid == PCIR_BAR(bar)) { 863 return (mmio->res); 864 } 865 } 866 867 mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO); 868 mmio->rid = PCIR_BAR(bar); 869 mmio->type = type; 870 mmio->res = bus_alloc_resource_any(pdev->dev.bsddev, mmio->type, 871 &mmio->rid, RF_ACTIVE|RF_SHAREABLE); 872 if (mmio->res == NULL) { 873 device_printf(pdev->dev.bsddev, "%s: failed to alloc " 874 "bar %d type %d rid %d\n", 875 __func__, bar, type, PCIR_BAR(bar)); 876 free(mmio, M_DEVBUF); 877 return (NULL); 878 } 879 TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next); 880 881 return (mmio->res); 882 } 883 884 int 885 linux_pci_register_drm_driver(struct pci_driver *pdrv) 886 { 887 devclass_t dc; 888 889 dc = devclass_create("vgapci"); 890 if (dc == NULL) 891 return (-ENXIO); 892 pdrv->isdrm = true; 893 pdrv->name = "drmn"; 894 return (_linux_pci_register_driver(pdrv, dc)); 895 } 896 897 void 898 linux_pci_unregister_driver(struct pci_driver *pdrv) 899 { 900 devclass_t bus; 901 902 bus = devclass_find("pci"); 903 904 spin_lock(&pci_lock); 905 list_del(&pdrv->node); 906 spin_unlock(&pci_lock); 907 bus_topo_lock(); 908 if (bus != NULL) 909 devclass_delete_driver(bus, &pdrv->bsddriver); 910 bus_topo_unlock(); 911 } 912 913 void 914 linux_pci_unregister_drm_driver(struct pci_driver *pdrv) 915 { 916 devclass_t bus; 917 918 bus = devclass_find("vgapci"); 919 920 spin_lock(&pci_lock); 921 list_del(&pdrv->node); 922 spin_unlock(&pci_lock); 923 bus_topo_lock(); 924 if (bus != NULL) 925 devclass_delete_driver(bus, &pdrv->bsddriver); 926 bus_topo_unlock(); 927 } 928 929 int 930 pci_alloc_irq_vectors(struct pci_dev *pdev, int minv, int maxv, 931 unsigned int flags) 932 { 933 int error; 934 935 if (flags & PCI_IRQ_MSIX) { 936 struct msix_entry *entries; 937 int i; 938 939 entries = kcalloc(maxv, sizeof(*entries), GFP_KERNEL); 940 if (entries == NULL) { 941 error = -ENOMEM; 942 goto out; 943 } 944 for (i = 0; i < maxv; ++i) 945 entries[i].entry = i; 946 error = pci_enable_msix(pdev, entries, maxv); 947 out: 948 kfree(entries); 949 if (error == 0 && pdev->msix_enabled) 950 return (pdev->dev.irq_end - pdev->dev.irq_start); 951 } 952 if (flags & PCI_IRQ_MSI) { 953 if (pci_msi_count(pdev->dev.bsddev) < minv) 954 return (-ENOSPC); 955 /* We only support 1 vector in pci_enable_msi() */ 956 if (minv != 1) 957 return (-ENOSPC); 958 error = pci_enable_msi(pdev); 959 if (error == 0 && pdev->msi_enabled) 960 return (pdev->dev.irq_end - pdev->dev.irq_start); 961 } 962 if (flags & PCI_IRQ_LEGACY) { 963 if (pdev->irq) 964 return (1); 965 } 966 967 return (-EINVAL); 968 } 969 970 struct msi_desc * 971 lkpi_pci_msi_desc_alloc(int irq) 972 { 973 struct device *dev; 974 struct pci_dev *pdev; 975 struct msi_desc *desc; 976 struct pci_devinfo *dinfo; 977 struct pcicfg_msi *msi; 978 979 dev = linux_pci_find_irq_dev(irq); 980 if (dev == NULL) 981 return (NULL); 982 983 pdev = to_pci_dev(dev); 984 if (pdev->msi_desc != NULL) 985 return (pdev->msi_desc); 986 987 dinfo = device_get_ivars(dev->bsddev); 988 msi = &dinfo->cfg.msi; 989 990 desc = malloc(sizeof(*desc), M_DEVBUF, M_WAITOK | M_ZERO); 991 992 desc->msi_attrib.is_64 = 993 (msi->msi_ctrl & PCIM_MSICTRL_64BIT) ? true : false; 994 desc->msg.data = msi->msi_data; 995 996 return (desc); 997 } 998 999 bool 1000 pci_device_is_present(struct pci_dev *pdev) 1001 { 1002 device_t dev; 1003 1004 dev = pdev->dev.bsddev; 1005 1006 return (bus_child_present(dev)); 1007 } 1008 1009 CTASSERT(sizeof(dma_addr_t) <= sizeof(uint64_t)); 1010 1011 struct linux_dma_obj { 1012 void *vaddr; 1013 uint64_t dma_addr; 1014 bus_dmamap_t dmamap; 1015 bus_dma_tag_t dmat; 1016 }; 1017 1018 static uma_zone_t linux_dma_trie_zone; 1019 static uma_zone_t linux_dma_obj_zone; 1020 1021 static void 1022 linux_dma_init(void *arg) 1023 { 1024 1025 linux_dma_trie_zone = uma_zcreate("linux_dma_pctrie", 1026 pctrie_node_size(), NULL, NULL, pctrie_zone_init, NULL, 1027 UMA_ALIGN_PTR, 0); 1028 linux_dma_obj_zone = uma_zcreate("linux_dma_object", 1029 sizeof(struct linux_dma_obj), NULL, NULL, NULL, NULL, 1030 UMA_ALIGN_PTR, 0); 1031 lkpi_pci_nseg1_fail = counter_u64_alloc(M_WAITOK); 1032 } 1033 SYSINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_init, NULL); 1034 1035 static void 1036 linux_dma_uninit(void *arg) 1037 { 1038 1039 counter_u64_free(lkpi_pci_nseg1_fail); 1040 uma_zdestroy(linux_dma_obj_zone); 1041 uma_zdestroy(linux_dma_trie_zone); 1042 } 1043 SYSUNINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_uninit, NULL); 1044 1045 static void * 1046 linux_dma_trie_alloc(struct pctrie *ptree) 1047 { 1048 1049 return (uma_zalloc(linux_dma_trie_zone, M_NOWAIT)); 1050 } 1051 1052 static void 1053 linux_dma_trie_free(struct pctrie *ptree, void *node) 1054 { 1055 1056 uma_zfree(linux_dma_trie_zone, node); 1057 } 1058 1059 PCTRIE_DEFINE(LINUX_DMA, linux_dma_obj, dma_addr, linux_dma_trie_alloc, 1060 linux_dma_trie_free); 1061 1062 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__) 1063 static dma_addr_t 1064 linux_dma_map_phys_common(struct device *dev, vm_paddr_t phys, size_t len, 1065 bus_dma_tag_t dmat) 1066 { 1067 struct linux_dma_priv *priv; 1068 struct linux_dma_obj *obj; 1069 int error, nseg; 1070 bus_dma_segment_t seg; 1071 1072 priv = dev->dma_priv; 1073 1074 /* 1075 * If the resultant mapping will be entirely 1:1 with the 1076 * physical address, short-circuit the remainder of the 1077 * bus_dma API. This avoids tracking collisions in the pctrie 1078 * with the additional benefit of reducing overhead. 1079 */ 1080 if (bus_dma_id_mapped(dmat, phys, len)) 1081 return (phys); 1082 1083 obj = uma_zalloc(linux_dma_obj_zone, M_NOWAIT); 1084 if (obj == NULL) { 1085 return (0); 1086 } 1087 obj->dmat = dmat; 1088 1089 DMA_PRIV_LOCK(priv); 1090 if (bus_dmamap_create(obj->dmat, 0, &obj->dmamap) != 0) { 1091 DMA_PRIV_UNLOCK(priv); 1092 uma_zfree(linux_dma_obj_zone, obj); 1093 return (0); 1094 } 1095 1096 nseg = -1; 1097 if (_bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len, 1098 BUS_DMA_NOWAIT, &seg, &nseg) != 0) { 1099 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1100 DMA_PRIV_UNLOCK(priv); 1101 uma_zfree(linux_dma_obj_zone, obj); 1102 counter_u64_add(lkpi_pci_nseg1_fail, 1); 1103 if (linuxkpi_debug) 1104 dump_stack(); 1105 return (0); 1106 } 1107 1108 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg)); 1109 obj->dma_addr = seg.ds_addr; 1110 1111 error = LINUX_DMA_PCTRIE_INSERT(&priv->ptree, obj); 1112 if (error != 0) { 1113 bus_dmamap_unload(obj->dmat, obj->dmamap); 1114 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1115 DMA_PRIV_UNLOCK(priv); 1116 uma_zfree(linux_dma_obj_zone, obj); 1117 return (0); 1118 } 1119 DMA_PRIV_UNLOCK(priv); 1120 return (obj->dma_addr); 1121 } 1122 #else 1123 static dma_addr_t 1124 linux_dma_map_phys_common(struct device *dev __unused, vm_paddr_t phys, 1125 size_t len __unused, bus_dma_tag_t dmat __unused) 1126 { 1127 return (phys); 1128 } 1129 #endif 1130 1131 dma_addr_t 1132 linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len) 1133 { 1134 struct linux_dma_priv *priv; 1135 1136 priv = dev->dma_priv; 1137 return (linux_dma_map_phys_common(dev, phys, len, priv->dmat)); 1138 } 1139 1140 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__) 1141 void 1142 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len) 1143 { 1144 struct linux_dma_priv *priv; 1145 struct linux_dma_obj *obj; 1146 1147 priv = dev->dma_priv; 1148 1149 if (pctrie_is_empty(&priv->ptree)) 1150 return; 1151 1152 DMA_PRIV_LOCK(priv); 1153 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr); 1154 if (obj == NULL) { 1155 DMA_PRIV_UNLOCK(priv); 1156 return; 1157 } 1158 LINUX_DMA_PCTRIE_REMOVE(&priv->ptree, dma_addr); 1159 bus_dmamap_unload(obj->dmat, obj->dmamap); 1160 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1161 DMA_PRIV_UNLOCK(priv); 1162 1163 uma_zfree(linux_dma_obj_zone, obj); 1164 } 1165 #else 1166 void 1167 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len) 1168 { 1169 } 1170 #endif 1171 1172 void * 1173 linux_dma_alloc_coherent(struct device *dev, size_t size, 1174 dma_addr_t *dma_handle, gfp_t flag) 1175 { 1176 struct linux_dma_priv *priv; 1177 vm_paddr_t high; 1178 size_t align; 1179 void *mem; 1180 1181 if (dev == NULL || dev->dma_priv == NULL) { 1182 *dma_handle = 0; 1183 return (NULL); 1184 } 1185 priv = dev->dma_priv; 1186 if (priv->dma_coherent_mask) 1187 high = priv->dma_coherent_mask; 1188 else 1189 /* Coherent is lower 32bit only by default in Linux. */ 1190 high = BUS_SPACE_MAXADDR_32BIT; 1191 align = PAGE_SIZE << get_order(size); 1192 /* Always zero the allocation. */ 1193 flag |= M_ZERO; 1194 mem = kmem_alloc_contig(size, flag & GFP_NATIVE_MASK, 0, high, 1195 align, 0, VM_MEMATTR_DEFAULT); 1196 if (mem != NULL) { 1197 *dma_handle = linux_dma_map_phys_common(dev, vtophys(mem), size, 1198 priv->dmat_coherent); 1199 if (*dma_handle == 0) { 1200 kmem_free(mem, size); 1201 mem = NULL; 1202 } 1203 } else { 1204 *dma_handle = 0; 1205 } 1206 return (mem); 1207 } 1208 1209 struct lkpi_devres_dmam_coherent { 1210 size_t size; 1211 dma_addr_t *handle; 1212 void *mem; 1213 }; 1214 1215 static void 1216 lkpi_dmam_free_coherent(struct device *dev, void *p) 1217 { 1218 struct lkpi_devres_dmam_coherent *dr; 1219 1220 dr = p; 1221 dma_free_coherent(dev, dr->size, dr->mem, *dr->handle); 1222 } 1223 1224 void * 1225 linuxkpi_dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 1226 gfp_t flag) 1227 { 1228 struct lkpi_devres_dmam_coherent *dr; 1229 1230 dr = lkpi_devres_alloc(lkpi_dmam_free_coherent, 1231 sizeof(*dr), GFP_KERNEL | __GFP_ZERO); 1232 1233 if (dr == NULL) 1234 return (NULL); 1235 1236 dr->size = size; 1237 dr->mem = linux_dma_alloc_coherent(dev, size, dma_handle, flag); 1238 dr->handle = dma_handle; 1239 if (dr->mem == NULL) { 1240 lkpi_devres_free(dr); 1241 return (NULL); 1242 } 1243 1244 lkpi_devres_add(dev, dr); 1245 return (dr->mem); 1246 } 1247 1248 void 1249 linuxkpi_dma_sync(struct device *dev, dma_addr_t dma_addr, size_t size, 1250 bus_dmasync_op_t op) 1251 { 1252 struct linux_dma_priv *priv; 1253 struct linux_dma_obj *obj; 1254 1255 priv = dev->dma_priv; 1256 1257 if (pctrie_is_empty(&priv->ptree)) 1258 return; 1259 1260 DMA_PRIV_LOCK(priv); 1261 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr); 1262 if (obj == NULL) { 1263 DMA_PRIV_UNLOCK(priv); 1264 return; 1265 } 1266 1267 bus_dmamap_sync(obj->dmat, obj->dmamap, op); 1268 DMA_PRIV_UNLOCK(priv); 1269 } 1270 1271 int 1272 linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, 1273 enum dma_data_direction direction, unsigned long attrs __unused) 1274 { 1275 struct linux_dma_priv *priv; 1276 struct scatterlist *sg; 1277 int i, nseg; 1278 bus_dma_segment_t seg; 1279 1280 priv = dev->dma_priv; 1281 1282 DMA_PRIV_LOCK(priv); 1283 1284 /* create common DMA map in the first S/G entry */ 1285 if (bus_dmamap_create(priv->dmat, 0, &sgl->dma_map) != 0) { 1286 DMA_PRIV_UNLOCK(priv); 1287 return (0); 1288 } 1289 1290 /* load all S/G list entries */ 1291 for_each_sg(sgl, sg, nents, i) { 1292 nseg = -1; 1293 if (_bus_dmamap_load_phys(priv->dmat, sgl->dma_map, 1294 sg_phys(sg), sg->length, BUS_DMA_NOWAIT, 1295 &seg, &nseg) != 0) { 1296 bus_dmamap_unload(priv->dmat, sgl->dma_map); 1297 bus_dmamap_destroy(priv->dmat, sgl->dma_map); 1298 DMA_PRIV_UNLOCK(priv); 1299 return (0); 1300 } 1301 KASSERT(nseg == 0, 1302 ("More than one segment (nseg=%d)", nseg + 1)); 1303 1304 sg_dma_address(sg) = seg.ds_addr; 1305 } 1306 1307 switch (direction) { 1308 case DMA_BIDIRECTIONAL: 1309 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE); 1310 break; 1311 case DMA_TO_DEVICE: 1312 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD); 1313 break; 1314 case DMA_FROM_DEVICE: 1315 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE); 1316 break; 1317 default: 1318 break; 1319 } 1320 1321 DMA_PRIV_UNLOCK(priv); 1322 1323 return (nents); 1324 } 1325 1326 void 1327 linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl, 1328 int nents __unused, enum dma_data_direction direction, 1329 unsigned long attrs __unused) 1330 { 1331 struct linux_dma_priv *priv; 1332 1333 priv = dev->dma_priv; 1334 1335 DMA_PRIV_LOCK(priv); 1336 1337 switch (direction) { 1338 case DMA_BIDIRECTIONAL: 1339 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD); 1340 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD); 1341 break; 1342 case DMA_TO_DEVICE: 1343 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTWRITE); 1344 break; 1345 case DMA_FROM_DEVICE: 1346 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD); 1347 break; 1348 default: 1349 break; 1350 } 1351 1352 bus_dmamap_unload(priv->dmat, sgl->dma_map); 1353 bus_dmamap_destroy(priv->dmat, sgl->dma_map); 1354 DMA_PRIV_UNLOCK(priv); 1355 } 1356 1357 struct dma_pool { 1358 struct device *pool_device; 1359 uma_zone_t pool_zone; 1360 struct mtx pool_lock; 1361 bus_dma_tag_t pool_dmat; 1362 size_t pool_entry_size; 1363 struct pctrie pool_ptree; 1364 }; 1365 1366 #define DMA_POOL_LOCK(pool) mtx_lock(&(pool)->pool_lock) 1367 #define DMA_POOL_UNLOCK(pool) mtx_unlock(&(pool)->pool_lock) 1368 1369 static inline int 1370 dma_pool_obj_ctor(void *mem, int size, void *arg, int flags) 1371 { 1372 struct linux_dma_obj *obj = mem; 1373 struct dma_pool *pool = arg; 1374 int error, nseg; 1375 bus_dma_segment_t seg; 1376 1377 nseg = -1; 1378 DMA_POOL_LOCK(pool); 1379 error = _bus_dmamap_load_phys(pool->pool_dmat, obj->dmamap, 1380 vtophys(obj->vaddr), pool->pool_entry_size, BUS_DMA_NOWAIT, 1381 &seg, &nseg); 1382 DMA_POOL_UNLOCK(pool); 1383 if (error != 0) { 1384 return (error); 1385 } 1386 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg)); 1387 obj->dma_addr = seg.ds_addr; 1388 1389 return (0); 1390 } 1391 1392 static void 1393 dma_pool_obj_dtor(void *mem, int size, void *arg) 1394 { 1395 struct linux_dma_obj *obj = mem; 1396 struct dma_pool *pool = arg; 1397 1398 DMA_POOL_LOCK(pool); 1399 bus_dmamap_unload(pool->pool_dmat, obj->dmamap); 1400 DMA_POOL_UNLOCK(pool); 1401 } 1402 1403 static int 1404 dma_pool_obj_import(void *arg, void **store, int count, int domain __unused, 1405 int flags) 1406 { 1407 struct dma_pool *pool = arg; 1408 struct linux_dma_obj *obj; 1409 int error, i; 1410 1411 for (i = 0; i < count; i++) { 1412 obj = uma_zalloc(linux_dma_obj_zone, flags); 1413 if (obj == NULL) 1414 break; 1415 1416 error = bus_dmamem_alloc(pool->pool_dmat, &obj->vaddr, 1417 BUS_DMA_NOWAIT, &obj->dmamap); 1418 if (error!= 0) { 1419 uma_zfree(linux_dma_obj_zone, obj); 1420 break; 1421 } 1422 1423 store[i] = obj; 1424 } 1425 1426 return (i); 1427 } 1428 1429 static void 1430 dma_pool_obj_release(void *arg, void **store, int count) 1431 { 1432 struct dma_pool *pool = arg; 1433 struct linux_dma_obj *obj; 1434 int i; 1435 1436 for (i = 0; i < count; i++) { 1437 obj = store[i]; 1438 bus_dmamem_free(pool->pool_dmat, obj->vaddr, obj->dmamap); 1439 uma_zfree(linux_dma_obj_zone, obj); 1440 } 1441 } 1442 1443 struct dma_pool * 1444 linux_dma_pool_create(char *name, struct device *dev, size_t size, 1445 size_t align, size_t boundary) 1446 { 1447 struct linux_dma_priv *priv; 1448 struct dma_pool *pool; 1449 1450 priv = dev->dma_priv; 1451 1452 pool = kzalloc(sizeof(*pool), GFP_KERNEL); 1453 pool->pool_device = dev; 1454 pool->pool_entry_size = size; 1455 1456 if (bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 1457 align, boundary, /* alignment, boundary */ 1458 priv->dma_mask, /* lowaddr */ 1459 BUS_SPACE_MAXADDR, /* highaddr */ 1460 NULL, NULL, /* filtfunc, filtfuncarg */ 1461 size, /* maxsize */ 1462 1, /* nsegments */ 1463 size, /* maxsegsz */ 1464 0, /* flags */ 1465 NULL, NULL, /* lockfunc, lockfuncarg */ 1466 &pool->pool_dmat)) { 1467 kfree(pool); 1468 return (NULL); 1469 } 1470 1471 pool->pool_zone = uma_zcache_create(name, -1, dma_pool_obj_ctor, 1472 dma_pool_obj_dtor, NULL, NULL, dma_pool_obj_import, 1473 dma_pool_obj_release, pool, 0); 1474 1475 mtx_init(&pool->pool_lock, "lkpi-dma-pool", NULL, MTX_DEF); 1476 pctrie_init(&pool->pool_ptree); 1477 1478 return (pool); 1479 } 1480 1481 void 1482 linux_dma_pool_destroy(struct dma_pool *pool) 1483 { 1484 1485 uma_zdestroy(pool->pool_zone); 1486 bus_dma_tag_destroy(pool->pool_dmat); 1487 mtx_destroy(&pool->pool_lock); 1488 kfree(pool); 1489 } 1490 1491 void 1492 lkpi_dmam_pool_destroy(struct device *dev, void *p) 1493 { 1494 struct dma_pool *pool; 1495 1496 pool = *(struct dma_pool **)p; 1497 LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree); 1498 linux_dma_pool_destroy(pool); 1499 } 1500 1501 void * 1502 linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, 1503 dma_addr_t *handle) 1504 { 1505 struct linux_dma_obj *obj; 1506 1507 obj = uma_zalloc_arg(pool->pool_zone, pool, mem_flags & GFP_NATIVE_MASK); 1508 if (obj == NULL) 1509 return (NULL); 1510 1511 DMA_POOL_LOCK(pool); 1512 if (LINUX_DMA_PCTRIE_INSERT(&pool->pool_ptree, obj) != 0) { 1513 DMA_POOL_UNLOCK(pool); 1514 uma_zfree_arg(pool->pool_zone, obj, pool); 1515 return (NULL); 1516 } 1517 DMA_POOL_UNLOCK(pool); 1518 1519 *handle = obj->dma_addr; 1520 return (obj->vaddr); 1521 } 1522 1523 void 1524 linux_dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr) 1525 { 1526 struct linux_dma_obj *obj; 1527 1528 DMA_POOL_LOCK(pool); 1529 obj = LINUX_DMA_PCTRIE_LOOKUP(&pool->pool_ptree, dma_addr); 1530 if (obj == NULL) { 1531 DMA_POOL_UNLOCK(pool); 1532 return; 1533 } 1534 LINUX_DMA_PCTRIE_REMOVE(&pool->pool_ptree, dma_addr); 1535 DMA_POOL_UNLOCK(pool); 1536 1537 uma_zfree_arg(pool->pool_zone, obj, pool); 1538 } 1539 1540 static int 1541 linux_backlight_get_status(device_t dev, struct backlight_props *props) 1542 { 1543 struct pci_dev *pdev; 1544 1545 linux_set_current(curthread); 1546 pdev = device_get_softc(dev); 1547 1548 props->brightness = pdev->dev.bd->props.brightness; 1549 props->brightness = props->brightness * 100 / pdev->dev.bd->props.max_brightness; 1550 props->nlevels = 0; 1551 1552 return (0); 1553 } 1554 1555 static int 1556 linux_backlight_get_info(device_t dev, struct backlight_info *info) 1557 { 1558 struct pci_dev *pdev; 1559 1560 linux_set_current(curthread); 1561 pdev = device_get_softc(dev); 1562 1563 info->type = BACKLIGHT_TYPE_PANEL; 1564 strlcpy(info->name, pdev->dev.bd->name, BACKLIGHTMAXNAMELENGTH); 1565 return (0); 1566 } 1567 1568 static int 1569 linux_backlight_update_status(device_t dev, struct backlight_props *props) 1570 { 1571 struct pci_dev *pdev; 1572 1573 linux_set_current(curthread); 1574 pdev = device_get_softc(dev); 1575 1576 pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness * 1577 props->brightness / 100; 1578 pdev->dev.bd->props.power = props->brightness == 0 ? 1579 4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */; 1580 return (pdev->dev.bd->ops->update_status(pdev->dev.bd)); 1581 } 1582 1583 struct backlight_device * 1584 linux_backlight_device_register(const char *name, struct device *dev, 1585 void *data, const struct backlight_ops *ops, struct backlight_properties *props) 1586 { 1587 1588 dev->bd = malloc(sizeof(*dev->bd), M_DEVBUF, M_WAITOK | M_ZERO); 1589 dev->bd->ops = ops; 1590 dev->bd->props.type = props->type; 1591 dev->bd->props.max_brightness = props->max_brightness; 1592 dev->bd->props.brightness = props->brightness; 1593 dev->bd->props.power = props->power; 1594 dev->bd->data = data; 1595 dev->bd->dev = dev; 1596 dev->bd->name = strdup(name, M_DEVBUF); 1597 1598 dev->backlight_dev = backlight_register(name, dev->bsddev); 1599 1600 return (dev->bd); 1601 } 1602 1603 void 1604 linux_backlight_device_unregister(struct backlight_device *bd) 1605 { 1606 1607 backlight_destroy(bd->dev->backlight_dev); 1608 free(bd->name, M_DEVBUF); 1609 free(bd, M_DEVBUF); 1610 }
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