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 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/sysctl.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/fcntl.h> 41 #include <sys/file.h> 42 #include <sys/filio.h> 43 #include <sys/pciio.h> 44 #include <sys/pctrie.h> 45 #include <sys/rman.h> 46 #include <sys/rwlock.h> 47 48 #include <vm/vm.h> 49 #include <vm/pmap.h> 50 51 #include <machine/bus.h> 52 #include <machine/resource.h> 53 #include <machine/stdarg.h> 54 55 #include <dev/pci/pcivar.h> 56 #include <dev/pci/pci_private.h> 57 #include <dev/pci/pci_iov.h> 58 #include <dev/backlight/backlight.h> 59 60 #include <linux/kernel.h> 61 #include <linux/kobject.h> 62 #include <linux/device.h> 63 #include <linux/slab.h> 64 #include <linux/module.h> 65 #include <linux/cdev.h> 66 #include <linux/file.h> 67 #include <linux/sysfs.h> 68 #include <linux/mm.h> 69 #include <linux/io.h> 70 #include <linux/vmalloc.h> 71 #include <linux/pci.h> 72 #include <linux/compat.h> 73 74 #include <linux/backlight.h> 75 76 #include "backlight_if.h" 77 #include "pcib_if.h" 78 79 /* Undef the linux function macro defined in linux/pci.h */ 80 #undef pci_get_class 81 82 extern int linuxkpi_debug; 83 84 SYSCTL_DECL(_compat_linuxkpi); 85 86 static counter_u64_t lkpi_pci_nseg1_fail; 87 SYSCTL_COUNTER_U64(_compat_linuxkpi, OID_AUTO, lkpi_pci_nseg1_fail, CTLFLAG_RD, 88 &lkpi_pci_nseg1_fail, "Count of busdma mapping failures of single-segment"); 89 90 static device_probe_t linux_pci_probe; 91 static device_attach_t linux_pci_attach; 92 static device_detach_t linux_pci_detach; 93 static device_suspend_t linux_pci_suspend; 94 static device_resume_t linux_pci_resume; 95 static device_shutdown_t linux_pci_shutdown; 96 static pci_iov_init_t linux_pci_iov_init; 97 static pci_iov_uninit_t linux_pci_iov_uninit; 98 static pci_iov_add_vf_t linux_pci_iov_add_vf; 99 static int linux_backlight_get_status(device_t dev, struct backlight_props *props); 100 static int linux_backlight_update_status(device_t dev, struct backlight_props *props); 101 static int linux_backlight_get_info(device_t dev, struct backlight_info *info); 102 static void lkpi_pcim_iomap_table_release(struct device *, void *); 103 104 static device_method_t pci_methods[] = { 105 DEVMETHOD(device_probe, linux_pci_probe), 106 DEVMETHOD(device_attach, linux_pci_attach), 107 DEVMETHOD(device_detach, linux_pci_detach), 108 DEVMETHOD(device_suspend, linux_pci_suspend), 109 DEVMETHOD(device_resume, linux_pci_resume), 110 DEVMETHOD(device_shutdown, linux_pci_shutdown), 111 DEVMETHOD(pci_iov_init, linux_pci_iov_init), 112 DEVMETHOD(pci_iov_uninit, linux_pci_iov_uninit), 113 DEVMETHOD(pci_iov_add_vf, linux_pci_iov_add_vf), 114 115 /* backlight interface */ 116 DEVMETHOD(backlight_update_status, linux_backlight_update_status), 117 DEVMETHOD(backlight_get_status, linux_backlight_get_status), 118 DEVMETHOD(backlight_get_info, linux_backlight_get_info), 119 DEVMETHOD_END 120 }; 121 122 const char *pci_power_names[] = { 123 "UNKNOWN", "D0", "D1", "D2", "D3hot", "D3cold" 124 }; 125 126 /* We need some meta-struct to keep track of these for devres. */ 127 struct pci_devres { 128 bool enable_io; 129 /* PCIR_MAX_BAR_0 + 1 = 6 => BIT(0..5). */ 130 uint8_t region_mask; 131 struct resource *region_table[PCIR_MAX_BAR_0 + 1]; /* Not needed. */ 132 }; 133 struct pcim_iomap_devres { 134 void *mmio_table[PCIR_MAX_BAR_0 + 1]; 135 struct resource *res_table[PCIR_MAX_BAR_0 + 1]; 136 }; 137 138 struct linux_dma_priv { 139 uint64_t dma_mask; 140 bus_dma_tag_t dmat; 141 uint64_t dma_coherent_mask; 142 bus_dma_tag_t dmat_coherent; 143 struct mtx lock; 144 struct pctrie ptree; 145 }; 146 #define DMA_PRIV_LOCK(priv) mtx_lock(&(priv)->lock) 147 #define DMA_PRIV_UNLOCK(priv) mtx_unlock(&(priv)->lock) 148 149 static int 150 linux_pdev_dma_uninit(struct pci_dev *pdev) 151 { 152 struct linux_dma_priv *priv; 153 154 priv = pdev->dev.dma_priv; 155 if (priv->dmat) 156 bus_dma_tag_destroy(priv->dmat); 157 if (priv->dmat_coherent) 158 bus_dma_tag_destroy(priv->dmat_coherent); 159 mtx_destroy(&priv->lock); 160 pdev->dev.dma_priv = NULL; 161 free(priv, M_DEVBUF); 162 return (0); 163 } 164 165 static int 166 linux_pdev_dma_init(struct pci_dev *pdev) 167 { 168 struct linux_dma_priv *priv; 169 int error; 170 171 priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO); 172 173 mtx_init(&priv->lock, "lkpi-priv-dma", NULL, MTX_DEF); 174 pctrie_init(&priv->ptree); 175 176 pdev->dev.dma_priv = priv; 177 178 /* Create a default DMA tags. */ 179 error = linux_dma_tag_init(&pdev->dev, DMA_BIT_MASK(64)); 180 if (error != 0) 181 goto err; 182 /* Coherent is lower 32bit only by default in Linux. */ 183 error = linux_dma_tag_init_coherent(&pdev->dev, DMA_BIT_MASK(32)); 184 if (error != 0) 185 goto err; 186 187 return (error); 188 189 err: 190 linux_pdev_dma_uninit(pdev); 191 return (error); 192 } 193 194 int 195 linux_dma_tag_init(struct device *dev, u64 dma_mask) 196 { 197 struct linux_dma_priv *priv; 198 int error; 199 200 priv = dev->dma_priv; 201 202 if (priv->dmat) { 203 if (priv->dma_mask == dma_mask) 204 return (0); 205 206 bus_dma_tag_destroy(priv->dmat); 207 } 208 209 priv->dma_mask = dma_mask; 210 211 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 212 1, 0, /* alignment, boundary */ 213 dma_mask, /* lowaddr */ 214 BUS_SPACE_MAXADDR, /* highaddr */ 215 NULL, NULL, /* filtfunc, filtfuncarg */ 216 BUS_SPACE_MAXSIZE, /* maxsize */ 217 1, /* nsegments */ 218 BUS_SPACE_MAXSIZE, /* maxsegsz */ 219 0, /* flags */ 220 NULL, NULL, /* lockfunc, lockfuncarg */ 221 &priv->dmat); 222 return (-error); 223 } 224 225 int 226 linux_dma_tag_init_coherent(struct device *dev, u64 dma_mask) 227 { 228 struct linux_dma_priv *priv; 229 int error; 230 231 priv = dev->dma_priv; 232 233 if (priv->dmat_coherent) { 234 if (priv->dma_coherent_mask == dma_mask) 235 return (0); 236 237 bus_dma_tag_destroy(priv->dmat_coherent); 238 } 239 240 priv->dma_coherent_mask = dma_mask; 241 242 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 243 1, 0, /* alignment, boundary */ 244 dma_mask, /* lowaddr */ 245 BUS_SPACE_MAXADDR, /* highaddr */ 246 NULL, NULL, /* filtfunc, filtfuncarg */ 247 BUS_SPACE_MAXSIZE, /* maxsize */ 248 1, /* nsegments */ 249 BUS_SPACE_MAXSIZE, /* maxsegsz */ 250 0, /* flags */ 251 NULL, NULL, /* lockfunc, lockfuncarg */ 252 &priv->dmat_coherent); 253 return (-error); 254 } 255 256 static struct pci_driver * 257 linux_pci_find(device_t dev, const struct pci_device_id **idp) 258 { 259 const struct pci_device_id *id; 260 struct pci_driver *pdrv; 261 uint16_t vendor; 262 uint16_t device; 263 uint16_t subvendor; 264 uint16_t subdevice; 265 266 vendor = pci_get_vendor(dev); 267 device = pci_get_device(dev); 268 subvendor = pci_get_subvendor(dev); 269 subdevice = pci_get_subdevice(dev); 270 271 spin_lock(&pci_lock); 272 list_for_each_entry(pdrv, &pci_drivers, node) { 273 for (id = pdrv->id_table; id->vendor != 0; id++) { 274 if (vendor == id->vendor && 275 (PCI_ANY_ID == id->device || device == id->device) && 276 (PCI_ANY_ID == id->subvendor || subvendor == id->subvendor) && 277 (PCI_ANY_ID == id->subdevice || subdevice == id->subdevice)) { 278 *idp = id; 279 spin_unlock(&pci_lock); 280 return (pdrv); 281 } 282 } 283 } 284 spin_unlock(&pci_lock); 285 return (NULL); 286 } 287 288 struct pci_dev * 289 lkpi_pci_get_device(uint16_t vendor, uint16_t device, struct pci_dev *odev) 290 { 291 struct pci_dev *pdev; 292 293 KASSERT(odev == NULL, ("%s: odev argument not yet supported\n", __func__)); 294 295 spin_lock(&pci_lock); 296 list_for_each_entry(pdev, &pci_devices, links) { 297 if (pdev->vendor == vendor && pdev->device == device) 298 break; 299 } 300 spin_unlock(&pci_lock); 301 302 return (pdev); 303 } 304 305 static void 306 lkpi_pci_dev_release(struct device *dev) 307 { 308 309 lkpi_devres_release_free_list(dev); 310 spin_lock_destroy(&dev->devres_lock); 311 } 312 313 static void 314 lkpifill_pci_dev(device_t dev, struct pci_dev *pdev) 315 { 316 317 pdev->devfn = PCI_DEVFN(pci_get_slot(dev), pci_get_function(dev)); 318 pdev->vendor = pci_get_vendor(dev); 319 pdev->device = pci_get_device(dev); 320 pdev->subsystem_vendor = pci_get_subvendor(dev); 321 pdev->subsystem_device = pci_get_subdevice(dev); 322 pdev->class = pci_get_class(dev); 323 pdev->revision = pci_get_revid(dev); 324 pdev->path_name = kasprintf(GFP_KERNEL, "%04d:%02d:%02d.%d", 325 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev), 326 pci_get_function(dev)); 327 pdev->bus = malloc(sizeof(*pdev->bus), M_DEVBUF, M_WAITOK | M_ZERO); 328 /* 329 * This should be the upstream bridge; pci_upstream_bridge() 330 * handles that case on demand as otherwise we'll shadow the 331 * entire PCI hierarchy. 332 */ 333 pdev->bus->self = pdev; 334 pdev->bus->number = pci_get_bus(dev); 335 pdev->bus->domain = pci_get_domain(dev); 336 pdev->dev.bsddev = dev; 337 pdev->dev.parent = &linux_root_device; 338 pdev->dev.release = lkpi_pci_dev_release; 339 INIT_LIST_HEAD(&pdev->dev.irqents); 340 341 if (pci_msi_count(dev) > 0) 342 pdev->msi_desc = malloc(pci_msi_count(dev) * 343 sizeof(*pdev->msi_desc), M_DEVBUF, M_WAITOK | M_ZERO); 344 345 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 346 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 347 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 348 kobject_name(&pdev->dev.kobj)); 349 spin_lock_init(&pdev->dev.devres_lock); 350 INIT_LIST_HEAD(&pdev->dev.devres_head); 351 } 352 353 static void 354 lkpinew_pci_dev_release(struct device *dev) 355 { 356 struct pci_dev *pdev; 357 int i; 358 359 pdev = to_pci_dev(dev); 360 if (pdev->root != NULL) 361 pci_dev_put(pdev->root); 362 if (pdev->bus->self != pdev) 363 pci_dev_put(pdev->bus->self); 364 free(pdev->bus, M_DEVBUF); 365 if (pdev->msi_desc != NULL) { 366 for (i = pci_msi_count(pdev->dev.bsddev) - 1; i >= 0; i--) 367 free(pdev->msi_desc[i], M_DEVBUF); 368 free(pdev->msi_desc, M_DEVBUF); 369 } 370 kfree(pdev->path_name); 371 free(pdev, M_DEVBUF); 372 } 373 374 struct pci_dev * 375 lkpinew_pci_dev(device_t dev) 376 { 377 struct pci_dev *pdev; 378 379 pdev = malloc(sizeof(*pdev), M_DEVBUF, M_WAITOK|M_ZERO); 380 lkpifill_pci_dev(dev, pdev); 381 pdev->dev.release = lkpinew_pci_dev_release; 382 383 return (pdev); 384 } 385 386 struct pci_dev * 387 lkpi_pci_get_class(unsigned int class, struct pci_dev *from) 388 { 389 device_t dev; 390 device_t devfrom = NULL; 391 struct pci_dev *pdev; 392 393 if (from != NULL) 394 devfrom = from->dev.bsddev; 395 396 dev = pci_find_class_from(class >> 16, (class >> 8) & 0xFF, devfrom); 397 if (dev == NULL) 398 return (NULL); 399 400 pdev = lkpinew_pci_dev(dev); 401 return (pdev); 402 } 403 404 struct pci_dev * 405 lkpi_pci_get_domain_bus_and_slot(int domain, unsigned int bus, 406 unsigned int devfn) 407 { 408 device_t dev; 409 struct pci_dev *pdev; 410 411 dev = pci_find_dbsf(domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); 412 if (dev == NULL) 413 return (NULL); 414 415 pdev = lkpinew_pci_dev(dev); 416 return (pdev); 417 } 418 419 static int 420 linux_pci_probe(device_t dev) 421 { 422 const struct pci_device_id *id; 423 struct pci_driver *pdrv; 424 425 if ((pdrv = linux_pci_find(dev, &id)) == NULL) 426 return (ENXIO); 427 if (device_get_driver(dev) != &pdrv->bsddriver) 428 return (ENXIO); 429 device_set_desc(dev, pdrv->name); 430 431 /* Assume BSS initialized (should never return BUS_PROBE_SPECIFIC). */ 432 if (pdrv->bsd_probe_return == 0) 433 return (BUS_PROBE_DEFAULT); 434 else 435 return (pdrv->bsd_probe_return); 436 } 437 438 static int 439 linux_pci_attach(device_t dev) 440 { 441 const struct pci_device_id *id; 442 struct pci_driver *pdrv; 443 struct pci_dev *pdev; 444 445 pdrv = linux_pci_find(dev, &id); 446 pdev = device_get_softc(dev); 447 448 MPASS(pdrv != NULL); 449 MPASS(pdev != NULL); 450 451 return (linux_pci_attach_device(dev, pdrv, id, pdev)); 452 } 453 454 static struct resource_list_entry * 455 linux_pci_reserve_bar(struct pci_dev *pdev, struct resource_list *rl, 456 int type, int rid) 457 { 458 device_t dev; 459 struct resource *res; 460 461 KASSERT(type == SYS_RES_IOPORT || type == SYS_RES_MEMORY, 462 ("trying to reserve non-BAR type %d", type)); 463 464 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ? 465 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev; 466 res = pci_reserve_map(device_get_parent(dev), dev, type, &rid, 0, ~0, 467 1, 1, 0); 468 if (res == NULL) 469 return (NULL); 470 return (resource_list_find(rl, type, rid)); 471 } 472 473 static struct resource_list_entry * 474 linux_pci_get_rle(struct pci_dev *pdev, int type, int rid, bool reserve_bar) 475 { 476 struct pci_devinfo *dinfo; 477 struct resource_list *rl; 478 struct resource_list_entry *rle; 479 480 dinfo = device_get_ivars(pdev->dev.bsddev); 481 rl = &dinfo->resources; 482 rle = resource_list_find(rl, type, rid); 483 /* Reserve resources for this BAR if needed. */ 484 if (rle == NULL && reserve_bar) 485 rle = linux_pci_reserve_bar(pdev, rl, type, rid); 486 return (rle); 487 } 488 489 int 490 linux_pci_attach_device(device_t dev, struct pci_driver *pdrv, 491 const struct pci_device_id *id, struct pci_dev *pdev) 492 { 493 struct resource_list_entry *rle; 494 device_t parent; 495 uintptr_t rid; 496 int error; 497 bool isdrm; 498 499 linux_set_current(curthread); 500 501 parent = device_get_parent(dev); 502 isdrm = pdrv != NULL && pdrv->isdrm; 503 504 if (isdrm) { 505 struct pci_devinfo *dinfo; 506 507 dinfo = device_get_ivars(parent); 508 device_set_ivars(dev, dinfo); 509 } 510 511 lkpifill_pci_dev(dev, pdev); 512 if (isdrm) 513 PCI_GET_ID(device_get_parent(parent), parent, PCI_ID_RID, &rid); 514 else 515 PCI_GET_ID(parent, dev, PCI_ID_RID, &rid); 516 pdev->devfn = rid; 517 pdev->pdrv = pdrv; 518 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0, false); 519 if (rle != NULL) 520 pdev->dev.irq = rle->start; 521 else 522 pdev->dev.irq = LINUX_IRQ_INVALID; 523 pdev->irq = pdev->dev.irq; 524 error = linux_pdev_dma_init(pdev); 525 if (error) 526 goto out_dma_init; 527 528 TAILQ_INIT(&pdev->mmio); 529 spin_lock_init(&pdev->pcie_cap_lock); 530 531 spin_lock(&pci_lock); 532 list_add(&pdev->links, &pci_devices); 533 spin_unlock(&pci_lock); 534 535 if (pdrv != NULL) { 536 error = pdrv->probe(pdev, id); 537 if (error) 538 goto out_probe; 539 } 540 return (0); 541 542 out_probe: 543 free(pdev->bus, M_DEVBUF); 544 spin_lock_destroy(&pdev->pcie_cap_lock); 545 linux_pdev_dma_uninit(pdev); 546 out_dma_init: 547 spin_lock(&pci_lock); 548 list_del(&pdev->links); 549 spin_unlock(&pci_lock); 550 put_device(&pdev->dev); 551 return (-error); 552 } 553 554 static int 555 linux_pci_detach(device_t dev) 556 { 557 struct pci_dev *pdev; 558 559 pdev = device_get_softc(dev); 560 561 MPASS(pdev != NULL); 562 563 device_set_desc(dev, NULL); 564 565 return (linux_pci_detach_device(pdev)); 566 } 567 568 int 569 linux_pci_detach_device(struct pci_dev *pdev) 570 { 571 572 linux_set_current(curthread); 573 574 if (pdev->pdrv != NULL) 575 pdev->pdrv->remove(pdev); 576 577 if (pdev->root != NULL) 578 pci_dev_put(pdev->root); 579 free(pdev->bus, M_DEVBUF); 580 linux_pdev_dma_uninit(pdev); 581 582 spin_lock(&pci_lock); 583 list_del(&pdev->links); 584 spin_unlock(&pci_lock); 585 spin_lock_destroy(&pdev->pcie_cap_lock); 586 put_device(&pdev->dev); 587 588 return (0); 589 } 590 591 static int 592 lkpi_pci_disable_dev(struct device *dev) 593 { 594 595 (void) pci_disable_io(dev->bsddev, SYS_RES_MEMORY); 596 (void) pci_disable_io(dev->bsddev, SYS_RES_IOPORT); 597 return (0); 598 } 599 600 static struct pci_devres * 601 lkpi_pci_devres_get_alloc(struct pci_dev *pdev) 602 { 603 struct pci_devres *dr; 604 605 dr = lkpi_devres_find(&pdev->dev, lkpi_pci_devres_release, NULL, NULL); 606 if (dr == NULL) { 607 dr = lkpi_devres_alloc(lkpi_pci_devres_release, sizeof(*dr), 608 GFP_KERNEL | __GFP_ZERO); 609 if (dr != NULL) 610 lkpi_devres_add(&pdev->dev, dr); 611 } 612 613 return (dr); 614 } 615 616 static struct pci_devres * 617 lkpi_pci_devres_find(struct pci_dev *pdev) 618 { 619 if (!pdev->managed) 620 return (NULL); 621 622 return (lkpi_pci_devres_get_alloc(pdev)); 623 } 624 625 void 626 lkpi_pci_devres_release(struct device *dev, void *p) 627 { 628 struct pci_devres *dr; 629 struct pci_dev *pdev; 630 int bar; 631 632 pdev = to_pci_dev(dev); 633 dr = p; 634 635 if (pdev->msix_enabled) 636 lkpi_pci_disable_msix(pdev); 637 if (pdev->msi_enabled) 638 lkpi_pci_disable_msi(pdev); 639 640 if (dr->enable_io && lkpi_pci_disable_dev(dev) == 0) 641 dr->enable_io = false; 642 643 if (dr->region_mask == 0) 644 return; 645 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) { 646 647 if ((dr->region_mask & (1 << bar)) == 0) 648 continue; 649 pci_release_region(pdev, bar); 650 } 651 } 652 653 int 654 linuxkpi_pcim_enable_device(struct pci_dev *pdev) 655 { 656 struct pci_devres *dr; 657 int error; 658 659 /* Here we cannot run through the pdev->managed check. */ 660 dr = lkpi_pci_devres_get_alloc(pdev); 661 if (dr == NULL) 662 return (-ENOMEM); 663 664 /* If resources were enabled before do not do it again. */ 665 if (dr->enable_io) 666 return (0); 667 668 error = pci_enable_device(pdev); 669 if (error == 0) 670 dr->enable_io = true; 671 672 /* This device is not managed. */ 673 pdev->managed = true; 674 675 return (error); 676 } 677 678 static struct pcim_iomap_devres * 679 lkpi_pcim_iomap_devres_find(struct pci_dev *pdev) 680 { 681 struct pcim_iomap_devres *dr; 682 683 dr = lkpi_devres_find(&pdev->dev, lkpi_pcim_iomap_table_release, 684 NULL, NULL); 685 if (dr == NULL) { 686 dr = lkpi_devres_alloc(lkpi_pcim_iomap_table_release, 687 sizeof(*dr), GFP_KERNEL | __GFP_ZERO); 688 if (dr != NULL) 689 lkpi_devres_add(&pdev->dev, dr); 690 } 691 692 if (dr == NULL) 693 device_printf(pdev->dev.bsddev, "%s: NULL\n", __func__); 694 695 return (dr); 696 } 697 698 void __iomem ** 699 linuxkpi_pcim_iomap_table(struct pci_dev *pdev) 700 { 701 struct pcim_iomap_devres *dr; 702 703 dr = lkpi_pcim_iomap_devres_find(pdev); 704 if (dr == NULL) 705 return (NULL); 706 707 /* 708 * If the driver has manually set a flag to be able to request the 709 * resource to use bus_read/write_<n>, return the shadow table. 710 */ 711 if (pdev->want_iomap_res) 712 return ((void **)dr->res_table); 713 714 /* This is the Linux default. */ 715 return (dr->mmio_table); 716 } 717 718 static struct resource * 719 _lkpi_pci_iomap(struct pci_dev *pdev, int bar, int mmio_size __unused) 720 { 721 struct pci_mmio_region *mmio, *p; 722 int type; 723 724 type = pci_resource_type(pdev, bar); 725 if (type < 0) { 726 device_printf(pdev->dev.bsddev, "%s: bar %d type %d\n", 727 __func__, bar, type); 728 return (NULL); 729 } 730 731 /* 732 * Check for duplicate mappings. 733 * This can happen if a driver calls pci_request_region() first. 734 */ 735 TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) { 736 if (mmio->type == type && mmio->rid == PCIR_BAR(bar)) { 737 return (mmio->res); 738 } 739 } 740 741 mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO); 742 mmio->rid = PCIR_BAR(bar); 743 mmio->type = type; 744 mmio->res = bus_alloc_resource_any(pdev->dev.bsddev, mmio->type, 745 &mmio->rid, RF_ACTIVE|RF_SHAREABLE); 746 if (mmio->res == NULL) { 747 device_printf(pdev->dev.bsddev, "%s: failed to alloc " 748 "bar %d type %d rid %d\n", 749 __func__, bar, type, PCIR_BAR(bar)); 750 free(mmio, M_DEVBUF); 751 return (NULL); 752 } 753 TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next); 754 755 return (mmio->res); 756 } 757 758 void * 759 linuxkpi_pci_iomap(struct pci_dev *pdev, int mmio_bar, int mmio_size) 760 { 761 struct resource *res; 762 763 res = _lkpi_pci_iomap(pdev, mmio_bar, mmio_size); 764 if (res == NULL) 765 return (NULL); 766 /* This is a FreeBSD extension so we can use bus_*(). */ 767 if (pdev->want_iomap_res) 768 return (res); 769 return ((void *)rman_get_bushandle(res)); 770 } 771 772 void 773 linuxkpi_pci_iounmap(struct pci_dev *pdev, void *res) 774 { 775 struct pci_mmio_region *mmio, *p; 776 777 TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) { 778 if (res != (void *)rman_get_bushandle(mmio->res)) 779 continue; 780 bus_release_resource(pdev->dev.bsddev, 781 mmio->type, mmio->rid, mmio->res); 782 TAILQ_REMOVE(&pdev->mmio, mmio, next); 783 free(mmio, M_DEVBUF); 784 return; 785 } 786 } 787 788 int 789 linuxkpi_pcim_iomap_regions(struct pci_dev *pdev, uint32_t mask, const char *name) 790 { 791 struct pcim_iomap_devres *dr; 792 void *res; 793 uint32_t mappings; 794 int bar; 795 796 dr = lkpi_pcim_iomap_devres_find(pdev); 797 if (dr == NULL) 798 return (-ENOMEM); 799 800 /* Now iomap all the requested (by "mask") ones. */ 801 for (bar = mappings = 0; mappings != mask; bar++) { 802 if ((mask & (1 << bar)) == 0) 803 continue; 804 805 /* Request double is not allowed. */ 806 if (dr->mmio_table[bar] != NULL) { 807 device_printf(pdev->dev.bsddev, "%s: bar %d %p\n", 808 __func__, bar, dr->mmio_table[bar]); 809 goto err; 810 } 811 812 res = _lkpi_pci_iomap(pdev, bar, 0); 813 if (res == NULL) 814 goto err; 815 dr->mmio_table[bar] = (void *)rman_get_bushandle(res); 816 dr->res_table[bar] = res; 817 818 mappings |= (1 << bar); 819 } 820 821 return (0); 822 err: 823 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) { 824 if ((mappings & (1 << bar)) != 0) { 825 res = dr->mmio_table[bar]; 826 if (res == NULL) 827 continue; 828 pci_iounmap(pdev, res); 829 } 830 } 831 832 return (-EINVAL); 833 } 834 835 static void 836 lkpi_pcim_iomap_table_release(struct device *dev, void *p) 837 { 838 struct pcim_iomap_devres *dr; 839 struct pci_dev *pdev; 840 int bar; 841 842 dr = p; 843 pdev = to_pci_dev(dev); 844 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) { 845 846 if (dr->mmio_table[bar] == NULL) 847 continue; 848 849 pci_iounmap(pdev, dr->mmio_table[bar]); 850 } 851 } 852 853 static int 854 linux_pci_suspend(device_t dev) 855 { 856 const struct dev_pm_ops *pmops; 857 struct pm_message pm = { }; 858 struct pci_dev *pdev; 859 int error; 860 861 error = 0; 862 linux_set_current(curthread); 863 pdev = device_get_softc(dev); 864 pmops = pdev->pdrv->driver.pm; 865 866 if (pdev->pdrv->suspend != NULL) 867 error = -pdev->pdrv->suspend(pdev, pm); 868 else if (pmops != NULL && pmops->suspend != NULL) { 869 error = -pmops->suspend(&pdev->dev); 870 if (error == 0 && pmops->suspend_late != NULL) 871 error = -pmops->suspend_late(&pdev->dev); 872 } 873 return (error); 874 } 875 876 static int 877 linux_pci_resume(device_t dev) 878 { 879 const struct dev_pm_ops *pmops; 880 struct pci_dev *pdev; 881 int error; 882 883 error = 0; 884 linux_set_current(curthread); 885 pdev = device_get_softc(dev); 886 pmops = pdev->pdrv->driver.pm; 887 888 if (pdev->pdrv->resume != NULL) 889 error = -pdev->pdrv->resume(pdev); 890 else if (pmops != NULL && pmops->resume != NULL) { 891 if (pmops->resume_early != NULL) 892 error = -pmops->resume_early(&pdev->dev); 893 if (error == 0 && pmops->resume != NULL) 894 error = -pmops->resume(&pdev->dev); 895 } 896 return (error); 897 } 898 899 static int 900 linux_pci_shutdown(device_t dev) 901 { 902 struct pci_dev *pdev; 903 904 linux_set_current(curthread); 905 pdev = device_get_softc(dev); 906 if (pdev->pdrv->shutdown != NULL) 907 pdev->pdrv->shutdown(pdev); 908 return (0); 909 } 910 911 static int 912 linux_pci_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *pf_config) 913 { 914 struct pci_dev *pdev; 915 int error; 916 917 linux_set_current(curthread); 918 pdev = device_get_softc(dev); 919 if (pdev->pdrv->bsd_iov_init != NULL) 920 error = pdev->pdrv->bsd_iov_init(dev, num_vfs, pf_config); 921 else 922 error = EINVAL; 923 return (error); 924 } 925 926 static void 927 linux_pci_iov_uninit(device_t dev) 928 { 929 struct pci_dev *pdev; 930 931 linux_set_current(curthread); 932 pdev = device_get_softc(dev); 933 if (pdev->pdrv->bsd_iov_uninit != NULL) 934 pdev->pdrv->bsd_iov_uninit(dev); 935 } 936 937 static int 938 linux_pci_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *vf_config) 939 { 940 struct pci_dev *pdev; 941 int error; 942 943 linux_set_current(curthread); 944 pdev = device_get_softc(dev); 945 if (pdev->pdrv->bsd_iov_add_vf != NULL) 946 error = pdev->pdrv->bsd_iov_add_vf(dev, vfnum, vf_config); 947 else 948 error = EINVAL; 949 return (error); 950 } 951 952 static int 953 _linux_pci_register_driver(struct pci_driver *pdrv, devclass_t dc) 954 { 955 int error; 956 957 linux_set_current(curthread); 958 spin_lock(&pci_lock); 959 list_add(&pdrv->node, &pci_drivers); 960 spin_unlock(&pci_lock); 961 if (pdrv->bsddriver.name == NULL) 962 pdrv->bsddriver.name = pdrv->name; 963 pdrv->bsddriver.methods = pci_methods; 964 pdrv->bsddriver.size = sizeof(struct pci_dev); 965 966 bus_topo_lock(); 967 error = devclass_add_driver(dc, &pdrv->bsddriver, 968 BUS_PASS_DEFAULT, &pdrv->bsdclass); 969 bus_topo_unlock(); 970 return (-error); 971 } 972 973 int 974 linux_pci_register_driver(struct pci_driver *pdrv) 975 { 976 devclass_t dc; 977 978 dc = devclass_find("pci"); 979 if (dc == NULL) 980 return (-ENXIO); 981 pdrv->isdrm = false; 982 return (_linux_pci_register_driver(pdrv, dc)); 983 } 984 985 static struct resource_list_entry * 986 lkpi_pci_get_bar(struct pci_dev *pdev, int bar, bool reserve) 987 { 988 int type; 989 990 type = pci_resource_type(pdev, bar); 991 if (type < 0) 992 return (NULL); 993 bar = PCIR_BAR(bar); 994 return (linux_pci_get_rle(pdev, type, bar, reserve)); 995 } 996 997 struct device * 998 lkpi_pci_find_irq_dev(unsigned int irq) 999 { 1000 struct pci_dev *pdev; 1001 struct device *found; 1002 1003 found = NULL; 1004 spin_lock(&pci_lock); 1005 list_for_each_entry(pdev, &pci_devices, links) { 1006 if (irq == pdev->dev.irq || 1007 (irq >= pdev->dev.irq_start && irq < pdev->dev.irq_end)) { 1008 found = &pdev->dev; 1009 break; 1010 } 1011 } 1012 spin_unlock(&pci_lock); 1013 return (found); 1014 } 1015 1016 unsigned long 1017 pci_resource_start(struct pci_dev *pdev, int bar) 1018 { 1019 struct resource_list_entry *rle; 1020 rman_res_t newstart; 1021 device_t dev; 1022 int error; 1023 1024 if ((rle = lkpi_pci_get_bar(pdev, bar, true)) == NULL) 1025 return (0); 1026 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ? 1027 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev; 1028 error = bus_translate_resource(dev, rle->type, rle->start, &newstart); 1029 if (error != 0) { 1030 device_printf(pdev->dev.bsddev, 1031 "translate of %#jx failed: %d\n", 1032 (uintmax_t)rle->start, error); 1033 return (0); 1034 } 1035 return (newstart); 1036 } 1037 1038 unsigned long 1039 pci_resource_len(struct pci_dev *pdev, int bar) 1040 { 1041 struct resource_list_entry *rle; 1042 1043 if ((rle = lkpi_pci_get_bar(pdev, bar, true)) == NULL) 1044 return (0); 1045 return (rle->count); 1046 } 1047 1048 int 1049 pci_request_region(struct pci_dev *pdev, int bar, const char *res_name) 1050 { 1051 struct resource *res; 1052 struct pci_devres *dr; 1053 struct pci_mmio_region *mmio; 1054 int rid; 1055 int type; 1056 1057 type = pci_resource_type(pdev, bar); 1058 if (type < 0) 1059 return (-ENODEV); 1060 rid = PCIR_BAR(bar); 1061 res = bus_alloc_resource_any(pdev->dev.bsddev, type, &rid, 1062 RF_ACTIVE|RF_SHAREABLE); 1063 if (res == NULL) { 1064 device_printf(pdev->dev.bsddev, "%s: failed to alloc " 1065 "bar %d type %d rid %d\n", 1066 __func__, bar, type, PCIR_BAR(bar)); 1067 return (-ENODEV); 1068 } 1069 1070 /* 1071 * It seems there is an implicit devres tracking on these if the device 1072 * is managed; otherwise the resources are not automatiaclly freed on 1073 * FreeBSD/LinuxKPI tough they should be/are expected to be by Linux 1074 * drivers. 1075 */ 1076 dr = lkpi_pci_devres_find(pdev); 1077 if (dr != NULL) { 1078 dr->region_mask |= (1 << bar); 1079 dr->region_table[bar] = res; 1080 } 1081 1082 /* Even if the device is not managed we need to track it for iomap. */ 1083 mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO); 1084 mmio->rid = PCIR_BAR(bar); 1085 mmio->type = type; 1086 mmio->res = res; 1087 TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next); 1088 1089 return (0); 1090 } 1091 1092 int 1093 linuxkpi_pci_request_regions(struct pci_dev *pdev, const char *res_name) 1094 { 1095 int error; 1096 int i; 1097 1098 for (i = 0; i <= PCIR_MAX_BAR_0; i++) { 1099 error = pci_request_region(pdev, i, res_name); 1100 if (error && error != -ENODEV) { 1101 pci_release_regions(pdev); 1102 return (error); 1103 } 1104 } 1105 return (0); 1106 } 1107 1108 void 1109 linuxkpi_pci_release_region(struct pci_dev *pdev, int bar) 1110 { 1111 struct resource_list_entry *rle; 1112 struct pci_devres *dr; 1113 struct pci_mmio_region *mmio, *p; 1114 1115 if ((rle = lkpi_pci_get_bar(pdev, bar, false)) == NULL) 1116 return; 1117 1118 /* 1119 * As we implicitly track the requests we also need to clear them on 1120 * release. Do clear before resource release. 1121 */ 1122 dr = lkpi_pci_devres_find(pdev); 1123 if (dr != NULL) { 1124 KASSERT(dr->region_table[bar] == rle->res, ("%s: pdev %p bar %d" 1125 " region_table res %p != rel->res %p\n", __func__, pdev, 1126 bar, dr->region_table[bar], rle->res)); 1127 dr->region_table[bar] = NULL; 1128 dr->region_mask &= ~(1 << bar); 1129 } 1130 1131 TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) { 1132 if (rle->res != (void *)rman_get_bushandle(mmio->res)) 1133 continue; 1134 TAILQ_REMOVE(&pdev->mmio, mmio, next); 1135 free(mmio, M_DEVBUF); 1136 } 1137 1138 bus_release_resource(pdev->dev.bsddev, rle->type, rle->rid, rle->res); 1139 } 1140 1141 void 1142 linuxkpi_pci_release_regions(struct pci_dev *pdev) 1143 { 1144 int i; 1145 1146 for (i = 0; i <= PCIR_MAX_BAR_0; i++) 1147 pci_release_region(pdev, i); 1148 } 1149 1150 int 1151 linux_pci_register_drm_driver(struct pci_driver *pdrv) 1152 { 1153 devclass_t dc; 1154 1155 dc = devclass_create("vgapci"); 1156 if (dc == NULL) 1157 return (-ENXIO); 1158 pdrv->isdrm = true; 1159 pdrv->name = "drmn"; 1160 return (_linux_pci_register_driver(pdrv, dc)); 1161 } 1162 1163 void 1164 linux_pci_unregister_driver(struct pci_driver *pdrv) 1165 { 1166 devclass_t bus; 1167 1168 bus = devclass_find("pci"); 1169 1170 spin_lock(&pci_lock); 1171 list_del(&pdrv->node); 1172 spin_unlock(&pci_lock); 1173 bus_topo_lock(); 1174 if (bus != NULL) 1175 devclass_delete_driver(bus, &pdrv->bsddriver); 1176 bus_topo_unlock(); 1177 } 1178 1179 void 1180 linux_pci_unregister_drm_driver(struct pci_driver *pdrv) 1181 { 1182 devclass_t bus; 1183 1184 bus = devclass_find("vgapci"); 1185 1186 spin_lock(&pci_lock); 1187 list_del(&pdrv->node); 1188 spin_unlock(&pci_lock); 1189 bus_topo_lock(); 1190 if (bus != NULL) 1191 devclass_delete_driver(bus, &pdrv->bsddriver); 1192 bus_topo_unlock(); 1193 } 1194 1195 int 1196 linuxkpi_pci_enable_msix(struct pci_dev *pdev, struct msix_entry *entries, 1197 int nreq) 1198 { 1199 struct resource_list_entry *rle; 1200 int error; 1201 int avail; 1202 int i; 1203 1204 avail = pci_msix_count(pdev->dev.bsddev); 1205 if (avail < nreq) { 1206 if (avail == 0) 1207 return -EINVAL; 1208 return avail; 1209 } 1210 avail = nreq; 1211 if ((error = -pci_alloc_msix(pdev->dev.bsddev, &avail)) != 0) 1212 return error; 1213 /* 1214 * Handle case where "pci_alloc_msix()" may allocate less 1215 * interrupts than available and return with no error: 1216 */ 1217 if (avail < nreq) { 1218 pci_release_msi(pdev->dev.bsddev); 1219 return avail; 1220 } 1221 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 1, false); 1222 pdev->dev.irq_start = rle->start; 1223 pdev->dev.irq_end = rle->start + avail; 1224 for (i = 0; i < nreq; i++) 1225 entries[i].vector = pdev->dev.irq_start + i; 1226 pdev->msix_enabled = true; 1227 return (0); 1228 } 1229 1230 int 1231 _lkpi_pci_enable_msi_range(struct pci_dev *pdev, int minvec, int maxvec) 1232 { 1233 struct resource_list_entry *rle; 1234 int error; 1235 int nvec; 1236 1237 if (maxvec < minvec) 1238 return (-EINVAL); 1239 1240 nvec = pci_msi_count(pdev->dev.bsddev); 1241 if (nvec < 1 || nvec < minvec) 1242 return (-ENOSPC); 1243 1244 nvec = min(nvec, maxvec); 1245 if ((error = -pci_alloc_msi(pdev->dev.bsddev, &nvec)) != 0) 1246 return error; 1247 1248 /* Native PCI might only ever ask for 32 vectors. */ 1249 if (nvec < minvec) { 1250 pci_release_msi(pdev->dev.bsddev); 1251 return (-ENOSPC); 1252 } 1253 1254 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 1, false); 1255 pdev->dev.irq_start = rle->start; 1256 pdev->dev.irq_end = rle->start + nvec; 1257 pdev->irq = rle->start; 1258 pdev->msi_enabled = true; 1259 return (0); 1260 } 1261 1262 int 1263 pci_alloc_irq_vectors(struct pci_dev *pdev, int minv, int maxv, 1264 unsigned int flags) 1265 { 1266 int error; 1267 1268 if (flags & PCI_IRQ_MSIX) { 1269 struct msix_entry *entries; 1270 int i; 1271 1272 entries = kcalloc(maxv, sizeof(*entries), GFP_KERNEL); 1273 if (entries == NULL) { 1274 error = -ENOMEM; 1275 goto out; 1276 } 1277 for (i = 0; i < maxv; ++i) 1278 entries[i].entry = i; 1279 error = pci_enable_msix(pdev, entries, maxv); 1280 out: 1281 kfree(entries); 1282 if (error == 0 && pdev->msix_enabled) 1283 return (pdev->dev.irq_end - pdev->dev.irq_start); 1284 } 1285 if (flags & PCI_IRQ_MSI) { 1286 if (pci_msi_count(pdev->dev.bsddev) < minv) 1287 return (-ENOSPC); 1288 error = _lkpi_pci_enable_msi_range(pdev, minv, maxv); 1289 if (error == 0 && pdev->msi_enabled) 1290 return (pdev->dev.irq_end - pdev->dev.irq_start); 1291 } 1292 if (flags & PCI_IRQ_LEGACY) { 1293 if (pdev->irq) 1294 return (1); 1295 } 1296 1297 return (-EINVAL); 1298 } 1299 1300 struct msi_desc * 1301 lkpi_pci_msi_desc_alloc(int irq) 1302 { 1303 struct device *dev; 1304 struct pci_dev *pdev; 1305 struct msi_desc *desc; 1306 struct pci_devinfo *dinfo; 1307 struct pcicfg_msi *msi; 1308 int vec; 1309 1310 dev = lkpi_pci_find_irq_dev(irq); 1311 if (dev == NULL) 1312 return (NULL); 1313 1314 pdev = to_pci_dev(dev); 1315 1316 if (pdev->msi_desc == NULL) 1317 return (NULL); 1318 1319 if (irq < pdev->dev.irq_start || irq >= pdev->dev.irq_end) 1320 return (NULL); 1321 1322 vec = pdev->dev.irq_start - irq; 1323 1324 if (pdev->msi_desc[vec] != NULL) 1325 return (pdev->msi_desc[vec]); 1326 1327 dinfo = device_get_ivars(dev->bsddev); 1328 msi = &dinfo->cfg.msi; 1329 1330 desc = malloc(sizeof(*desc), M_DEVBUF, M_WAITOK | M_ZERO); 1331 1332 desc->pci.msi_attrib.is_64 = 1333 (msi->msi_ctrl & PCIM_MSICTRL_64BIT) ? true : false; 1334 desc->msg.data = msi->msi_data; 1335 1336 pdev->msi_desc[vec] = desc; 1337 1338 return (desc); 1339 } 1340 1341 bool 1342 pci_device_is_present(struct pci_dev *pdev) 1343 { 1344 device_t dev; 1345 1346 dev = pdev->dev.bsddev; 1347 1348 return (bus_child_present(dev)); 1349 } 1350 1351 CTASSERT(sizeof(dma_addr_t) <= sizeof(uint64_t)); 1352 1353 struct linux_dma_obj { 1354 void *vaddr; 1355 uint64_t dma_addr; 1356 bus_dmamap_t dmamap; 1357 bus_dma_tag_t dmat; 1358 }; 1359 1360 static uma_zone_t linux_dma_trie_zone; 1361 static uma_zone_t linux_dma_obj_zone; 1362 1363 static void 1364 linux_dma_init(void *arg) 1365 { 1366 1367 linux_dma_trie_zone = uma_zcreate("linux_dma_pctrie", 1368 pctrie_node_size(), NULL, NULL, pctrie_zone_init, NULL, 1369 UMA_ALIGN_PTR, 0); 1370 linux_dma_obj_zone = uma_zcreate("linux_dma_object", 1371 sizeof(struct linux_dma_obj), NULL, NULL, NULL, NULL, 1372 UMA_ALIGN_PTR, 0); 1373 lkpi_pci_nseg1_fail = counter_u64_alloc(M_WAITOK); 1374 } 1375 SYSINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_init, NULL); 1376 1377 static void 1378 linux_dma_uninit(void *arg) 1379 { 1380 1381 counter_u64_free(lkpi_pci_nseg1_fail); 1382 uma_zdestroy(linux_dma_obj_zone); 1383 uma_zdestroy(linux_dma_trie_zone); 1384 } 1385 SYSUNINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_uninit, NULL); 1386 1387 static void * 1388 linux_dma_trie_alloc(struct pctrie *ptree) 1389 { 1390 1391 return (uma_zalloc(linux_dma_trie_zone, M_NOWAIT)); 1392 } 1393 1394 static void 1395 linux_dma_trie_free(struct pctrie *ptree, void *node) 1396 { 1397 1398 uma_zfree(linux_dma_trie_zone, node); 1399 } 1400 1401 PCTRIE_DEFINE(LINUX_DMA, linux_dma_obj, dma_addr, linux_dma_trie_alloc, 1402 linux_dma_trie_free); 1403 1404 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__) 1405 static dma_addr_t 1406 linux_dma_map_phys_common(struct device *dev, vm_paddr_t phys, size_t len, 1407 bus_dma_tag_t dmat) 1408 { 1409 struct linux_dma_priv *priv; 1410 struct linux_dma_obj *obj; 1411 int error, nseg; 1412 bus_dma_segment_t seg; 1413 1414 priv = dev->dma_priv; 1415 1416 /* 1417 * If the resultant mapping will be entirely 1:1 with the 1418 * physical address, short-circuit the remainder of the 1419 * bus_dma API. This avoids tracking collisions in the pctrie 1420 * with the additional benefit of reducing overhead. 1421 */ 1422 if (bus_dma_id_mapped(dmat, phys, len)) 1423 return (phys); 1424 1425 obj = uma_zalloc(linux_dma_obj_zone, M_NOWAIT); 1426 if (obj == NULL) { 1427 return (0); 1428 } 1429 obj->dmat = dmat; 1430 1431 DMA_PRIV_LOCK(priv); 1432 if (bus_dmamap_create(obj->dmat, 0, &obj->dmamap) != 0) { 1433 DMA_PRIV_UNLOCK(priv); 1434 uma_zfree(linux_dma_obj_zone, obj); 1435 return (0); 1436 } 1437 1438 nseg = -1; 1439 if (_bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len, 1440 BUS_DMA_NOWAIT, &seg, &nseg) != 0) { 1441 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1442 DMA_PRIV_UNLOCK(priv); 1443 uma_zfree(linux_dma_obj_zone, obj); 1444 counter_u64_add(lkpi_pci_nseg1_fail, 1); 1445 if (linuxkpi_debug) 1446 dump_stack(); 1447 return (0); 1448 } 1449 1450 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg)); 1451 obj->dma_addr = seg.ds_addr; 1452 1453 error = LINUX_DMA_PCTRIE_INSERT(&priv->ptree, obj); 1454 if (error != 0) { 1455 bus_dmamap_unload(obj->dmat, obj->dmamap); 1456 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1457 DMA_PRIV_UNLOCK(priv); 1458 uma_zfree(linux_dma_obj_zone, obj); 1459 return (0); 1460 } 1461 DMA_PRIV_UNLOCK(priv); 1462 return (obj->dma_addr); 1463 } 1464 #else 1465 static dma_addr_t 1466 linux_dma_map_phys_common(struct device *dev __unused, vm_paddr_t phys, 1467 size_t len __unused, bus_dma_tag_t dmat __unused) 1468 { 1469 return (phys); 1470 } 1471 #endif 1472 1473 dma_addr_t 1474 linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len) 1475 { 1476 struct linux_dma_priv *priv; 1477 1478 priv = dev->dma_priv; 1479 return (linux_dma_map_phys_common(dev, phys, len, priv->dmat)); 1480 } 1481 1482 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__) 1483 void 1484 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len) 1485 { 1486 struct linux_dma_priv *priv; 1487 struct linux_dma_obj *obj; 1488 1489 priv = dev->dma_priv; 1490 1491 if (pctrie_is_empty(&priv->ptree)) 1492 return; 1493 1494 DMA_PRIV_LOCK(priv); 1495 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr); 1496 if (obj == NULL) { 1497 DMA_PRIV_UNLOCK(priv); 1498 return; 1499 } 1500 LINUX_DMA_PCTRIE_REMOVE(&priv->ptree, dma_addr); 1501 bus_dmamap_unload(obj->dmat, obj->dmamap); 1502 bus_dmamap_destroy(obj->dmat, obj->dmamap); 1503 DMA_PRIV_UNLOCK(priv); 1504 1505 uma_zfree(linux_dma_obj_zone, obj); 1506 } 1507 #else 1508 void 1509 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len) 1510 { 1511 } 1512 #endif 1513 1514 void * 1515 linux_dma_alloc_coherent(struct device *dev, size_t size, 1516 dma_addr_t *dma_handle, gfp_t flag) 1517 { 1518 struct linux_dma_priv *priv; 1519 vm_paddr_t high; 1520 size_t align; 1521 void *mem; 1522 1523 if (dev == NULL || dev->dma_priv == NULL) { 1524 *dma_handle = 0; 1525 return (NULL); 1526 } 1527 priv = dev->dma_priv; 1528 if (priv->dma_coherent_mask) 1529 high = priv->dma_coherent_mask; 1530 else 1531 /* Coherent is lower 32bit only by default in Linux. */ 1532 high = BUS_SPACE_MAXADDR_32BIT; 1533 align = PAGE_SIZE << get_order(size); 1534 /* Always zero the allocation. */ 1535 flag |= M_ZERO; 1536 mem = kmem_alloc_contig(size, flag & GFP_NATIVE_MASK, 0, high, 1537 align, 0, VM_MEMATTR_DEFAULT); 1538 if (mem != NULL) { 1539 *dma_handle = linux_dma_map_phys_common(dev, vtophys(mem), size, 1540 priv->dmat_coherent); 1541 if (*dma_handle == 0) { 1542 kmem_free(mem, size); 1543 mem = NULL; 1544 } 1545 } else { 1546 *dma_handle = 0; 1547 } 1548 return (mem); 1549 } 1550 1551 struct lkpi_devres_dmam_coherent { 1552 size_t size; 1553 dma_addr_t *handle; 1554 void *mem; 1555 }; 1556 1557 static void 1558 lkpi_dmam_free_coherent(struct device *dev, void *p) 1559 { 1560 struct lkpi_devres_dmam_coherent *dr; 1561 1562 dr = p; 1563 dma_free_coherent(dev, dr->size, dr->mem, *dr->handle); 1564 } 1565 1566 void * 1567 linuxkpi_dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 1568 gfp_t flag) 1569 { 1570 struct lkpi_devres_dmam_coherent *dr; 1571 1572 dr = lkpi_devres_alloc(lkpi_dmam_free_coherent, 1573 sizeof(*dr), GFP_KERNEL | __GFP_ZERO); 1574 1575 if (dr == NULL) 1576 return (NULL); 1577 1578 dr->size = size; 1579 dr->mem = linux_dma_alloc_coherent(dev, size, dma_handle, flag); 1580 dr->handle = dma_handle; 1581 if (dr->mem == NULL) { 1582 lkpi_devres_free(dr); 1583 return (NULL); 1584 } 1585 1586 lkpi_devres_add(dev, dr); 1587 return (dr->mem); 1588 } 1589 1590 void 1591 linuxkpi_dma_sync(struct device *dev, dma_addr_t dma_addr, size_t size, 1592 bus_dmasync_op_t op) 1593 { 1594 struct linux_dma_priv *priv; 1595 struct linux_dma_obj *obj; 1596 1597 priv = dev->dma_priv; 1598 1599 if (pctrie_is_empty(&priv->ptree)) 1600 return; 1601 1602 DMA_PRIV_LOCK(priv); 1603 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr); 1604 if (obj == NULL) { 1605 DMA_PRIV_UNLOCK(priv); 1606 return; 1607 } 1608 1609 bus_dmamap_sync(obj->dmat, obj->dmamap, op); 1610 DMA_PRIV_UNLOCK(priv); 1611 } 1612 1613 int 1614 linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, 1615 enum dma_data_direction direction, unsigned long attrs __unused) 1616 { 1617 struct linux_dma_priv *priv; 1618 struct scatterlist *sg; 1619 int i, nseg; 1620 bus_dma_segment_t seg; 1621 1622 priv = dev->dma_priv; 1623 1624 DMA_PRIV_LOCK(priv); 1625 1626 /* create common DMA map in the first S/G entry */ 1627 if (bus_dmamap_create(priv->dmat, 0, &sgl->dma_map) != 0) { 1628 DMA_PRIV_UNLOCK(priv); 1629 return (0); 1630 } 1631 1632 /* load all S/G list entries */ 1633 for_each_sg(sgl, sg, nents, i) { 1634 nseg = -1; 1635 if (_bus_dmamap_load_phys(priv->dmat, sgl->dma_map, 1636 sg_phys(sg), sg->length, BUS_DMA_NOWAIT, 1637 &seg, &nseg) != 0) { 1638 bus_dmamap_unload(priv->dmat, sgl->dma_map); 1639 bus_dmamap_destroy(priv->dmat, sgl->dma_map); 1640 DMA_PRIV_UNLOCK(priv); 1641 return (0); 1642 } 1643 KASSERT(nseg == 0, 1644 ("More than one segment (nseg=%d)", nseg + 1)); 1645 1646 sg_dma_address(sg) = seg.ds_addr; 1647 } 1648 1649 switch (direction) { 1650 case DMA_BIDIRECTIONAL: 1651 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE); 1652 break; 1653 case DMA_TO_DEVICE: 1654 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD); 1655 break; 1656 case DMA_FROM_DEVICE: 1657 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE); 1658 break; 1659 default: 1660 break; 1661 } 1662 1663 DMA_PRIV_UNLOCK(priv); 1664 1665 return (nents); 1666 } 1667 1668 void 1669 linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl, 1670 int nents __unused, enum dma_data_direction direction, 1671 unsigned long attrs __unused) 1672 { 1673 struct linux_dma_priv *priv; 1674 1675 priv = dev->dma_priv; 1676 1677 DMA_PRIV_LOCK(priv); 1678 1679 switch (direction) { 1680 case DMA_BIDIRECTIONAL: 1681 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD); 1682 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD); 1683 break; 1684 case DMA_TO_DEVICE: 1685 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTWRITE); 1686 break; 1687 case DMA_FROM_DEVICE: 1688 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD); 1689 break; 1690 default: 1691 break; 1692 } 1693 1694 bus_dmamap_unload(priv->dmat, sgl->dma_map); 1695 bus_dmamap_destroy(priv->dmat, sgl->dma_map); 1696 DMA_PRIV_UNLOCK(priv); 1697 } 1698 1699 struct dma_pool { 1700 struct device *pool_device; 1701 uma_zone_t pool_zone; 1702 struct mtx pool_lock; 1703 bus_dma_tag_t pool_dmat; 1704 size_t pool_entry_size; 1705 struct pctrie pool_ptree; 1706 }; 1707 1708 #define DMA_POOL_LOCK(pool) mtx_lock(&(pool)->pool_lock) 1709 #define DMA_POOL_UNLOCK(pool) mtx_unlock(&(pool)->pool_lock) 1710 1711 static inline int 1712 dma_pool_obj_ctor(void *mem, int size, void *arg, int flags) 1713 { 1714 struct linux_dma_obj *obj = mem; 1715 struct dma_pool *pool = arg; 1716 int error, nseg; 1717 bus_dma_segment_t seg; 1718 1719 nseg = -1; 1720 DMA_POOL_LOCK(pool); 1721 error = _bus_dmamap_load_phys(pool->pool_dmat, obj->dmamap, 1722 vtophys(obj->vaddr), pool->pool_entry_size, BUS_DMA_NOWAIT, 1723 &seg, &nseg); 1724 DMA_POOL_UNLOCK(pool); 1725 if (error != 0) { 1726 return (error); 1727 } 1728 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg)); 1729 obj->dma_addr = seg.ds_addr; 1730 1731 return (0); 1732 } 1733 1734 static void 1735 dma_pool_obj_dtor(void *mem, int size, void *arg) 1736 { 1737 struct linux_dma_obj *obj = mem; 1738 struct dma_pool *pool = arg; 1739 1740 DMA_POOL_LOCK(pool); 1741 bus_dmamap_unload(pool->pool_dmat, obj->dmamap); 1742 DMA_POOL_UNLOCK(pool); 1743 } 1744 1745 static int 1746 dma_pool_obj_import(void *arg, void **store, int count, int domain __unused, 1747 int flags) 1748 { 1749 struct dma_pool *pool = arg; 1750 struct linux_dma_obj *obj; 1751 int error, i; 1752 1753 for (i = 0; i < count; i++) { 1754 obj = uma_zalloc(linux_dma_obj_zone, flags); 1755 if (obj == NULL) 1756 break; 1757 1758 error = bus_dmamem_alloc(pool->pool_dmat, &obj->vaddr, 1759 BUS_DMA_NOWAIT, &obj->dmamap); 1760 if (error!= 0) { 1761 uma_zfree(linux_dma_obj_zone, obj); 1762 break; 1763 } 1764 1765 store[i] = obj; 1766 } 1767 1768 return (i); 1769 } 1770 1771 static void 1772 dma_pool_obj_release(void *arg, void **store, int count) 1773 { 1774 struct dma_pool *pool = arg; 1775 struct linux_dma_obj *obj; 1776 int i; 1777 1778 for (i = 0; i < count; i++) { 1779 obj = store[i]; 1780 bus_dmamem_free(pool->pool_dmat, obj->vaddr, obj->dmamap); 1781 uma_zfree(linux_dma_obj_zone, obj); 1782 } 1783 } 1784 1785 struct dma_pool * 1786 linux_dma_pool_create(char *name, struct device *dev, size_t size, 1787 size_t align, size_t boundary) 1788 { 1789 struct linux_dma_priv *priv; 1790 struct dma_pool *pool; 1791 1792 priv = dev->dma_priv; 1793 1794 pool = kzalloc(sizeof(*pool), GFP_KERNEL); 1795 pool->pool_device = dev; 1796 pool->pool_entry_size = size; 1797 1798 if (bus_dma_tag_create(bus_get_dma_tag(dev->bsddev), 1799 align, boundary, /* alignment, boundary */ 1800 priv->dma_mask, /* lowaddr */ 1801 BUS_SPACE_MAXADDR, /* highaddr */ 1802 NULL, NULL, /* filtfunc, filtfuncarg */ 1803 size, /* maxsize */ 1804 1, /* nsegments */ 1805 size, /* maxsegsz */ 1806 0, /* flags */ 1807 NULL, NULL, /* lockfunc, lockfuncarg */ 1808 &pool->pool_dmat)) { 1809 kfree(pool); 1810 return (NULL); 1811 } 1812 1813 pool->pool_zone = uma_zcache_create(name, -1, dma_pool_obj_ctor, 1814 dma_pool_obj_dtor, NULL, NULL, dma_pool_obj_import, 1815 dma_pool_obj_release, pool, 0); 1816 1817 mtx_init(&pool->pool_lock, "lkpi-dma-pool", NULL, MTX_DEF); 1818 pctrie_init(&pool->pool_ptree); 1819 1820 return (pool); 1821 } 1822 1823 void 1824 linux_dma_pool_destroy(struct dma_pool *pool) 1825 { 1826 1827 uma_zdestroy(pool->pool_zone); 1828 bus_dma_tag_destroy(pool->pool_dmat); 1829 mtx_destroy(&pool->pool_lock); 1830 kfree(pool); 1831 } 1832 1833 void 1834 lkpi_dmam_pool_destroy(struct device *dev, void *p) 1835 { 1836 struct dma_pool *pool; 1837 1838 pool = *(struct dma_pool **)p; 1839 LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree); 1840 linux_dma_pool_destroy(pool); 1841 } 1842 1843 void * 1844 linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, 1845 dma_addr_t *handle) 1846 { 1847 struct linux_dma_obj *obj; 1848 1849 obj = uma_zalloc_arg(pool->pool_zone, pool, mem_flags & GFP_NATIVE_MASK); 1850 if (obj == NULL) 1851 return (NULL); 1852 1853 DMA_POOL_LOCK(pool); 1854 if (LINUX_DMA_PCTRIE_INSERT(&pool->pool_ptree, obj) != 0) { 1855 DMA_POOL_UNLOCK(pool); 1856 uma_zfree_arg(pool->pool_zone, obj, pool); 1857 return (NULL); 1858 } 1859 DMA_POOL_UNLOCK(pool); 1860 1861 *handle = obj->dma_addr; 1862 return (obj->vaddr); 1863 } 1864 1865 void 1866 linux_dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr) 1867 { 1868 struct linux_dma_obj *obj; 1869 1870 DMA_POOL_LOCK(pool); 1871 obj = LINUX_DMA_PCTRIE_LOOKUP(&pool->pool_ptree, dma_addr); 1872 if (obj == NULL) { 1873 DMA_POOL_UNLOCK(pool); 1874 return; 1875 } 1876 LINUX_DMA_PCTRIE_REMOVE(&pool->pool_ptree, dma_addr); 1877 DMA_POOL_UNLOCK(pool); 1878 1879 uma_zfree_arg(pool->pool_zone, obj, pool); 1880 } 1881 1882 static int 1883 linux_backlight_get_status(device_t dev, struct backlight_props *props) 1884 { 1885 struct pci_dev *pdev; 1886 1887 linux_set_current(curthread); 1888 pdev = device_get_softc(dev); 1889 1890 props->brightness = pdev->dev.bd->props.brightness; 1891 props->brightness = props->brightness * 100 / pdev->dev.bd->props.max_brightness; 1892 props->nlevels = 0; 1893 1894 return (0); 1895 } 1896 1897 static int 1898 linux_backlight_get_info(device_t dev, struct backlight_info *info) 1899 { 1900 struct pci_dev *pdev; 1901 1902 linux_set_current(curthread); 1903 pdev = device_get_softc(dev); 1904 1905 info->type = BACKLIGHT_TYPE_PANEL; 1906 strlcpy(info->name, pdev->dev.bd->name, BACKLIGHTMAXNAMELENGTH); 1907 return (0); 1908 } 1909 1910 static int 1911 linux_backlight_update_status(device_t dev, struct backlight_props *props) 1912 { 1913 struct pci_dev *pdev; 1914 1915 linux_set_current(curthread); 1916 pdev = device_get_softc(dev); 1917 1918 pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness * 1919 props->brightness / 100; 1920 pdev->dev.bd->props.power = props->brightness == 0 ? 1921 4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */; 1922 return (pdev->dev.bd->ops->update_status(pdev->dev.bd)); 1923 } 1924 1925 struct backlight_device * 1926 linux_backlight_device_register(const char *name, struct device *dev, 1927 void *data, const struct backlight_ops *ops, struct backlight_properties *props) 1928 { 1929 1930 dev->bd = malloc(sizeof(*dev->bd), M_DEVBUF, M_WAITOK | M_ZERO); 1931 dev->bd->ops = ops; 1932 dev->bd->props.type = props->type; 1933 dev->bd->props.max_brightness = props->max_brightness; 1934 dev->bd->props.brightness = props->brightness; 1935 dev->bd->props.power = props->power; 1936 dev->bd->data = data; 1937 dev->bd->dev = dev; 1938 dev->bd->name = strdup(name, M_DEVBUF); 1939 1940 dev->backlight_dev = backlight_register(name, dev->bsddev); 1941 1942 return (dev->bd); 1943 } 1944 1945 void 1946 linux_backlight_device_unregister(struct backlight_device *bd) 1947 { 1948 1949 backlight_destroy(bd->dev->backlight_dev); 1950 free(bd->name, M_DEVBUF); 1951 free(bd, M_DEVBUF); 1952 } 1953