2 * Copyright (c) 2015-2016 Mellanox Technologies, Ltd.
4 * Copyright (c) 2020-2022 The FreeBSD Foundation
6 * Portions of this software were developed by Björn Zeeb
7 * under sponsorship from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
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.
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.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/sysctl.h>
41 #include <sys/mutex.h>
42 #include <sys/fcntl.h>
44 #include <sys/filio.h>
45 #include <sys/pciio.h>
46 #include <sys/pctrie.h>
47 #include <sys/rwlock.h>
52 #include <machine/stdarg.h>
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>
59 #include <linux/kobject.h>
60 #include <linux/device.h>
61 #include <linux/slab.h>
62 #include <linux/module.h>
63 #include <linux/cdev.h>
64 #include <linux/file.h>
65 #include <linux/sysfs.h>
68 #include <linux/vmalloc.h>
69 #include <linux/pci.h>
70 #include <linux/compat.h>
72 #include <linux/backlight.h>
74 #include "backlight_if.h"
77 /* Undef the linux function macro defined in linux/pci.h */
80 static device_probe_t linux_pci_probe;
81 static device_attach_t linux_pci_attach;
82 static device_detach_t linux_pci_detach;
83 static device_suspend_t linux_pci_suspend;
84 static device_resume_t linux_pci_resume;
85 static device_shutdown_t linux_pci_shutdown;
86 static pci_iov_init_t linux_pci_iov_init;
87 static pci_iov_uninit_t linux_pci_iov_uninit;
88 static pci_iov_add_vf_t linux_pci_iov_add_vf;
89 static int linux_backlight_get_status(device_t dev, struct backlight_props *props);
90 static int linux_backlight_update_status(device_t dev, struct backlight_props *props);
91 static int linux_backlight_get_info(device_t dev, struct backlight_info *info);
93 static device_method_t pci_methods[] = {
94 DEVMETHOD(device_probe, linux_pci_probe),
95 DEVMETHOD(device_attach, linux_pci_attach),
96 DEVMETHOD(device_detach, linux_pci_detach),
97 DEVMETHOD(device_suspend, linux_pci_suspend),
98 DEVMETHOD(device_resume, linux_pci_resume),
99 DEVMETHOD(device_shutdown, linux_pci_shutdown),
100 DEVMETHOD(pci_iov_init, linux_pci_iov_init),
101 DEVMETHOD(pci_iov_uninit, linux_pci_iov_uninit),
102 DEVMETHOD(pci_iov_add_vf, linux_pci_iov_add_vf),
104 /* backlight interface */
105 DEVMETHOD(backlight_update_status, linux_backlight_update_status),
106 DEVMETHOD(backlight_get_status, linux_backlight_get_status),
107 DEVMETHOD(backlight_get_info, linux_backlight_get_info),
111 struct linux_dma_priv {
114 uint64_t dma_coherent_mask;
115 bus_dma_tag_t dmat_coherent;
119 #define DMA_PRIV_LOCK(priv) mtx_lock(&(priv)->lock)
120 #define DMA_PRIV_UNLOCK(priv) mtx_unlock(&(priv)->lock)
123 linux_pdev_dma_uninit(struct pci_dev *pdev)
125 struct linux_dma_priv *priv;
127 priv = pdev->dev.dma_priv;
129 bus_dma_tag_destroy(priv->dmat);
130 if (priv->dmat_coherent)
131 bus_dma_tag_destroy(priv->dmat_coherent);
132 mtx_destroy(&priv->lock);
133 pdev->dev.dma_priv = NULL;
134 free(priv, M_DEVBUF);
139 linux_pdev_dma_init(struct pci_dev *pdev)
141 struct linux_dma_priv *priv;
144 priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO);
146 mtx_init(&priv->lock, "lkpi-priv-dma", NULL, MTX_DEF);
147 pctrie_init(&priv->ptree);
149 pdev->dev.dma_priv = priv;
151 /* Create a default DMA tags. */
152 error = linux_dma_tag_init(&pdev->dev, DMA_BIT_MASK(64));
155 /* Coherent is lower 32bit only by default in Linux. */
156 error = linux_dma_tag_init_coherent(&pdev->dev, DMA_BIT_MASK(32));
163 linux_pdev_dma_uninit(pdev);
168 linux_dma_tag_init(struct device *dev, u64 dma_mask)
170 struct linux_dma_priv *priv;
173 priv = dev->dma_priv;
176 if (priv->dma_mask == dma_mask)
179 bus_dma_tag_destroy(priv->dmat);
182 priv->dma_mask = dma_mask;
184 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
185 1, 0, /* alignment, boundary */
186 dma_mask, /* lowaddr */
187 BUS_SPACE_MAXADDR, /* highaddr */
188 NULL, NULL, /* filtfunc, filtfuncarg */
189 BUS_SPACE_MAXSIZE, /* maxsize */
191 BUS_SPACE_MAXSIZE, /* maxsegsz */
193 NULL, NULL, /* lockfunc, lockfuncarg */
199 linux_dma_tag_init_coherent(struct device *dev, u64 dma_mask)
201 struct linux_dma_priv *priv;
204 priv = dev->dma_priv;
206 if (priv->dmat_coherent) {
207 if (priv->dma_coherent_mask == dma_mask)
210 bus_dma_tag_destroy(priv->dmat_coherent);
213 priv->dma_coherent_mask = dma_mask;
215 error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
216 1, 0, /* alignment, boundary */
217 dma_mask, /* lowaddr */
218 BUS_SPACE_MAXADDR, /* highaddr */
219 NULL, NULL, /* filtfunc, filtfuncarg */
220 BUS_SPACE_MAXSIZE, /* maxsize */
222 BUS_SPACE_MAXSIZE, /* maxsegsz */
224 NULL, NULL, /* lockfunc, lockfuncarg */
225 &priv->dmat_coherent);
229 static struct pci_driver *
230 linux_pci_find(device_t dev, const struct pci_device_id **idp)
232 const struct pci_device_id *id;
233 struct pci_driver *pdrv;
239 vendor = pci_get_vendor(dev);
240 device = pci_get_device(dev);
241 subvendor = pci_get_subvendor(dev);
242 subdevice = pci_get_subdevice(dev);
244 spin_lock(&pci_lock);
245 list_for_each_entry(pdrv, &pci_drivers, node) {
246 for (id = pdrv->id_table; id->vendor != 0; id++) {
247 if (vendor == id->vendor &&
248 (PCI_ANY_ID == id->device || device == id->device) &&
249 (PCI_ANY_ID == id->subvendor || subvendor == id->subvendor) &&
250 (PCI_ANY_ID == id->subdevice || subdevice == id->subdevice)) {
252 spin_unlock(&pci_lock);
257 spin_unlock(&pci_lock);
262 lkpi_pci_dev_release(struct device *dev)
265 lkpi_devres_release_free_list(dev);
266 spin_lock_destroy(&dev->devres_lock);
270 lkpifill_pci_dev(device_t dev, struct pci_dev *pdev)
273 pdev->devfn = PCI_DEVFN(pci_get_slot(dev), pci_get_function(dev));
274 pdev->vendor = pci_get_vendor(dev);
275 pdev->device = pci_get_device(dev);
276 pdev->subsystem_vendor = pci_get_subvendor(dev);
277 pdev->subsystem_device = pci_get_subdevice(dev);
278 pdev->class = pci_get_class(dev);
279 pdev->revision = pci_get_revid(dev);
280 pdev->bus = malloc(sizeof(*pdev->bus), M_DEVBUF, M_WAITOK | M_ZERO);
282 * This should be the upstream bridge; pci_upstream_bridge()
283 * handles that case on demand as otherwise we'll shadow the
284 * entire PCI hierarchy.
286 pdev->bus->self = pdev;
287 pdev->bus->number = pci_get_bus(dev);
288 pdev->bus->domain = pci_get_domain(dev);
289 pdev->dev.bsddev = dev;
290 pdev->dev.parent = &linux_root_device;
291 pdev->dev.release = lkpi_pci_dev_release;
292 INIT_LIST_HEAD(&pdev->dev.irqents);
293 kobject_init(&pdev->dev.kobj, &linux_dev_ktype);
294 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
295 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj,
296 kobject_name(&pdev->dev.kobj));
297 spin_lock_init(&pdev->dev.devres_lock);
298 INIT_LIST_HEAD(&pdev->dev.devres_head);
302 lkpinew_pci_dev_release(struct device *dev)
304 struct pci_dev *pdev;
306 pdev = to_pci_dev(dev);
307 if (pdev->root != NULL)
308 pci_dev_put(pdev->root);
309 if (pdev->bus->self != pdev)
310 pci_dev_put(pdev->bus->self);
311 free(pdev->bus, M_DEVBUF);
312 free(pdev, M_DEVBUF);
316 lkpinew_pci_dev(device_t dev)
318 struct pci_dev *pdev;
320 pdev = malloc(sizeof(*pdev), M_DEVBUF, M_WAITOK|M_ZERO);
321 lkpifill_pci_dev(dev, pdev);
322 pdev->dev.release = lkpinew_pci_dev_release;
328 lkpi_pci_get_class(unsigned int class, struct pci_dev *from)
331 device_t devfrom = NULL;
332 struct pci_dev *pdev;
335 devfrom = from->dev.bsddev;
337 dev = pci_find_class_from(class >> 16, (class >> 8) & 0xFF, devfrom);
341 pdev = lkpinew_pci_dev(dev);
346 lkpi_pci_get_domain_bus_and_slot(int domain, unsigned int bus,
350 struct pci_dev *pdev;
352 dev = pci_find_dbsf(domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
356 pdev = lkpinew_pci_dev(dev);
361 linux_pci_probe(device_t dev)
363 const struct pci_device_id *id;
364 struct pci_driver *pdrv;
366 if ((pdrv = linux_pci_find(dev, &id)) == NULL)
368 if (device_get_driver(dev) != &pdrv->bsddriver)
370 device_set_desc(dev, pdrv->name);
372 /* Assume BSS initialized (should never return BUS_PROBE_SPECIFIC). */
373 if (pdrv->bsd_probe_return == 0)
374 return (BUS_PROBE_DEFAULT);
376 return (pdrv->bsd_probe_return);
380 linux_pci_attach(device_t dev)
382 const struct pci_device_id *id;
383 struct pci_driver *pdrv;
384 struct pci_dev *pdev;
386 pdrv = linux_pci_find(dev, &id);
387 pdev = device_get_softc(dev);
392 return (linux_pci_attach_device(dev, pdrv, id, pdev));
396 linux_pci_attach_device(device_t dev, struct pci_driver *pdrv,
397 const struct pci_device_id *id, struct pci_dev *pdev)
399 struct resource_list_entry *rle;
405 linux_set_current(curthread);
407 parent = device_get_parent(dev);
408 isdrm = pdrv != NULL && pdrv->isdrm;
411 struct pci_devinfo *dinfo;
413 dinfo = device_get_ivars(parent);
414 device_set_ivars(dev, dinfo);
417 lkpifill_pci_dev(dev, pdev);
419 PCI_GET_ID(device_get_parent(parent), parent, PCI_ID_RID, &rid);
421 PCI_GET_ID(parent, dev, PCI_ID_RID, &rid);
424 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0, false);
426 pdev->dev.irq = rle->start;
428 pdev->dev.irq = LINUX_IRQ_INVALID;
429 pdev->irq = pdev->dev.irq;
430 error = linux_pdev_dma_init(pdev);
434 TAILQ_INIT(&pdev->mmio);
436 spin_lock(&pci_lock);
437 list_add(&pdev->links, &pci_devices);
438 spin_unlock(&pci_lock);
441 error = pdrv->probe(pdev, id);
448 free(pdev->bus, M_DEVBUF);
449 linux_pdev_dma_uninit(pdev);
451 spin_lock(&pci_lock);
452 list_del(&pdev->links);
453 spin_unlock(&pci_lock);
454 put_device(&pdev->dev);
459 linux_pci_detach(device_t dev)
461 struct pci_dev *pdev;
463 pdev = device_get_softc(dev);
467 device_set_desc(dev, NULL);
469 return (linux_pci_detach_device(pdev));
473 linux_pci_detach_device(struct pci_dev *pdev)
476 linux_set_current(curthread);
478 if (pdev->pdrv != NULL)
479 pdev->pdrv->remove(pdev);
481 if (pdev->root != NULL)
482 pci_dev_put(pdev->root);
483 free(pdev->bus, M_DEVBUF);
484 linux_pdev_dma_uninit(pdev);
486 spin_lock(&pci_lock);
487 list_del(&pdev->links);
488 spin_unlock(&pci_lock);
489 put_device(&pdev->dev);
495 lkpi_pci_disable_dev(struct device *dev)
498 (void) pci_disable_io(dev->bsddev, SYS_RES_MEMORY);
499 (void) pci_disable_io(dev->bsddev, SYS_RES_IOPORT);
504 lkpi_pci_devres_release(struct device *dev, void *p)
506 struct pci_devres *dr;
507 struct pci_dev *pdev;
510 pdev = to_pci_dev(dev);
513 if (pdev->msix_enabled)
514 lkpi_pci_disable_msix(pdev);
515 if (pdev->msi_enabled)
516 lkpi_pci_disable_msi(pdev);
518 if (dr->enable_io && lkpi_pci_disable_dev(dev) == 0)
519 dr->enable_io = false;
521 if (dr->region_mask == 0)
523 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
525 if ((dr->region_mask & (1 << bar)) == 0)
527 pci_release_region(pdev, bar);
532 lkpi_pcim_iomap_table_release(struct device *dev, void *p)
534 struct pcim_iomap_devres *dr;
535 struct pci_dev *pdev;
539 pdev = to_pci_dev(dev);
540 for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
542 if (dr->mmio_table[bar] == NULL)
545 pci_iounmap(pdev, dr->mmio_table[bar]);
550 linux_pci_suspend(device_t dev)
552 const struct dev_pm_ops *pmops;
553 struct pm_message pm = { };
554 struct pci_dev *pdev;
558 linux_set_current(curthread);
559 pdev = device_get_softc(dev);
560 pmops = pdev->pdrv->driver.pm;
562 if (pdev->pdrv->suspend != NULL)
563 error = -pdev->pdrv->suspend(pdev, pm);
564 else if (pmops != NULL && pmops->suspend != NULL) {
565 error = -pmops->suspend(&pdev->dev);
566 if (error == 0 && pmops->suspend_late != NULL)
567 error = -pmops->suspend_late(&pdev->dev);
573 linux_pci_resume(device_t dev)
575 const struct dev_pm_ops *pmops;
576 struct pci_dev *pdev;
580 linux_set_current(curthread);
581 pdev = device_get_softc(dev);
582 pmops = pdev->pdrv->driver.pm;
584 if (pdev->pdrv->resume != NULL)
585 error = -pdev->pdrv->resume(pdev);
586 else if (pmops != NULL && pmops->resume != NULL) {
587 if (pmops->resume_early != NULL)
588 error = -pmops->resume_early(&pdev->dev);
589 if (error == 0 && pmops->resume != NULL)
590 error = -pmops->resume(&pdev->dev);
596 linux_pci_shutdown(device_t dev)
598 struct pci_dev *pdev;
600 linux_set_current(curthread);
601 pdev = device_get_softc(dev);
602 if (pdev->pdrv->shutdown != NULL)
603 pdev->pdrv->shutdown(pdev);
608 linux_pci_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *pf_config)
610 struct pci_dev *pdev;
613 linux_set_current(curthread);
614 pdev = device_get_softc(dev);
615 if (pdev->pdrv->bsd_iov_init != NULL)
616 error = pdev->pdrv->bsd_iov_init(dev, num_vfs, pf_config);
623 linux_pci_iov_uninit(device_t dev)
625 struct pci_dev *pdev;
627 linux_set_current(curthread);
628 pdev = device_get_softc(dev);
629 if (pdev->pdrv->bsd_iov_uninit != NULL)
630 pdev->pdrv->bsd_iov_uninit(dev);
634 linux_pci_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *vf_config)
636 struct pci_dev *pdev;
639 linux_set_current(curthread);
640 pdev = device_get_softc(dev);
641 if (pdev->pdrv->bsd_iov_add_vf != NULL)
642 error = pdev->pdrv->bsd_iov_add_vf(dev, vfnum, vf_config);
649 _linux_pci_register_driver(struct pci_driver *pdrv, devclass_t dc)
653 linux_set_current(curthread);
654 spin_lock(&pci_lock);
655 list_add(&pdrv->node, &pci_drivers);
656 spin_unlock(&pci_lock);
657 pdrv->bsddriver.name = pdrv->name;
658 pdrv->bsddriver.methods = pci_methods;
659 pdrv->bsddriver.size = sizeof(struct pci_dev);
662 error = devclass_add_driver(dc, &pdrv->bsddriver,
663 BUS_PASS_DEFAULT, &pdrv->bsdclass);
669 linux_pci_register_driver(struct pci_driver *pdrv)
673 dc = devclass_find("pci");
677 return (_linux_pci_register_driver(pdrv, dc));
680 struct resource_list_entry *
681 linux_pci_reserve_bar(struct pci_dev *pdev, struct resource_list *rl,
685 struct resource *res;
687 KASSERT(type == SYS_RES_IOPORT || type == SYS_RES_MEMORY,
688 ("trying to reserve non-BAR type %d", type));
690 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ?
691 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev;
692 res = pci_reserve_map(device_get_parent(dev), dev, type, &rid, 0, ~0,
696 return (resource_list_find(rl, type, rid));
700 pci_resource_start(struct pci_dev *pdev, int bar)
702 struct resource_list_entry *rle;
706 if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL)
708 dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ?
709 device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev;
710 if (BUS_TRANSLATE_RESOURCE(dev, rle->type, rle->start, &newstart)) {
711 device_printf(pdev->dev.bsddev, "translate of %#jx failed\n",
712 (uintmax_t)rle->start);
719 pci_resource_len(struct pci_dev *pdev, int bar)
721 struct resource_list_entry *rle;
723 if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL)
729 linux_pci_register_drm_driver(struct pci_driver *pdrv)
733 dc = devclass_create("vgapci");
738 return (_linux_pci_register_driver(pdrv, dc));
742 linux_pci_unregister_driver(struct pci_driver *pdrv)
746 bus = devclass_find("pci");
748 spin_lock(&pci_lock);
749 list_del(&pdrv->node);
750 spin_unlock(&pci_lock);
753 devclass_delete_driver(bus, &pdrv->bsddriver);
758 linux_pci_unregister_drm_driver(struct pci_driver *pdrv)
762 bus = devclass_find("vgapci");
764 spin_lock(&pci_lock);
765 list_del(&pdrv->node);
766 spin_unlock(&pci_lock);
769 devclass_delete_driver(bus, &pdrv->bsddriver);
773 CTASSERT(sizeof(dma_addr_t) <= sizeof(uint64_t));
775 struct linux_dma_obj {
782 static uma_zone_t linux_dma_trie_zone;
783 static uma_zone_t linux_dma_obj_zone;
786 linux_dma_init(void *arg)
789 linux_dma_trie_zone = uma_zcreate("linux_dma_pctrie",
790 pctrie_node_size(), NULL, NULL, pctrie_zone_init, NULL,
792 linux_dma_obj_zone = uma_zcreate("linux_dma_object",
793 sizeof(struct linux_dma_obj), NULL, NULL, NULL, NULL,
797 SYSINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_init, NULL);
800 linux_dma_uninit(void *arg)
803 uma_zdestroy(linux_dma_obj_zone);
804 uma_zdestroy(linux_dma_trie_zone);
806 SYSUNINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_uninit, NULL);
809 linux_dma_trie_alloc(struct pctrie *ptree)
812 return (uma_zalloc(linux_dma_trie_zone, M_NOWAIT));
816 linux_dma_trie_free(struct pctrie *ptree, void *node)
819 uma_zfree(linux_dma_trie_zone, node);
822 PCTRIE_DEFINE(LINUX_DMA, linux_dma_obj, dma_addr, linux_dma_trie_alloc,
823 linux_dma_trie_free);
825 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__)
827 linux_dma_map_phys_common(struct device *dev, vm_paddr_t phys, size_t len,
830 struct linux_dma_priv *priv;
831 struct linux_dma_obj *obj;
833 bus_dma_segment_t seg;
835 priv = dev->dma_priv;
838 * If the resultant mapping will be entirely 1:1 with the
839 * physical address, short-circuit the remainder of the
840 * bus_dma API. This avoids tracking collisions in the pctrie
841 * with the additional benefit of reducing overhead.
843 if (bus_dma_id_mapped(dmat, phys, len))
846 obj = uma_zalloc(linux_dma_obj_zone, M_NOWAIT);
853 if (bus_dmamap_create(obj->dmat, 0, &obj->dmamap) != 0) {
854 DMA_PRIV_UNLOCK(priv);
855 uma_zfree(linux_dma_obj_zone, obj);
860 if (_bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len,
861 BUS_DMA_NOWAIT, &seg, &nseg) != 0) {
862 bus_dmamap_destroy(obj->dmat, obj->dmamap);
863 DMA_PRIV_UNLOCK(priv);
864 uma_zfree(linux_dma_obj_zone, obj);
868 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg));
869 obj->dma_addr = seg.ds_addr;
871 error = LINUX_DMA_PCTRIE_INSERT(&priv->ptree, obj);
873 bus_dmamap_unload(obj->dmat, obj->dmamap);
874 bus_dmamap_destroy(obj->dmat, obj->dmamap);
875 DMA_PRIV_UNLOCK(priv);
876 uma_zfree(linux_dma_obj_zone, obj);
879 DMA_PRIV_UNLOCK(priv);
880 return (obj->dma_addr);
884 linux_dma_map_phys_common(struct device *dev __unused, vm_paddr_t phys,
885 size_t len __unused, bus_dma_tag_t dmat __unused)
892 linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len)
894 struct linux_dma_priv *priv;
896 priv = dev->dma_priv;
897 return (linux_dma_map_phys_common(dev, phys, len, priv->dmat));
900 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__)
902 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len)
904 struct linux_dma_priv *priv;
905 struct linux_dma_obj *obj;
907 priv = dev->dma_priv;
909 if (pctrie_is_empty(&priv->ptree))
913 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr);
915 DMA_PRIV_UNLOCK(priv);
918 LINUX_DMA_PCTRIE_REMOVE(&priv->ptree, dma_addr);
919 bus_dmamap_unload(obj->dmat, obj->dmamap);
920 bus_dmamap_destroy(obj->dmat, obj->dmamap);
921 DMA_PRIV_UNLOCK(priv);
923 uma_zfree(linux_dma_obj_zone, obj);
927 linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len)
933 linux_dma_alloc_coherent(struct device *dev, size_t size,
934 dma_addr_t *dma_handle, gfp_t flag)
936 struct linux_dma_priv *priv;
941 if (dev == NULL || dev->dma_priv == NULL) {
945 priv = dev->dma_priv;
946 if (priv->dma_coherent_mask)
947 high = priv->dma_coherent_mask;
949 /* Coherent is lower 32bit only by default in Linux. */
950 high = BUS_SPACE_MAXADDR_32BIT;
951 align = PAGE_SIZE << get_order(size);
952 /* Always zero the allocation. */
954 mem = (void *)kmem_alloc_contig(size, flag & GFP_NATIVE_MASK, 0, high,
955 align, 0, VM_MEMATTR_DEFAULT);
957 *dma_handle = linux_dma_map_phys_common(dev, vtophys(mem), size,
958 priv->dmat_coherent);
959 if (*dma_handle == 0) {
960 kmem_free((vm_offset_t)mem, size);
970 linuxkpi_dma_sync(struct device *dev, dma_addr_t dma_addr, size_t size,
973 struct linux_dma_priv *priv;
974 struct linux_dma_obj *obj;
976 priv = dev->dma_priv;
978 if (pctrie_is_empty(&priv->ptree))
982 obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr);
984 DMA_PRIV_UNLOCK(priv);
988 bus_dmamap_sync(obj->dmat, obj->dmamap, op);
989 DMA_PRIV_UNLOCK(priv);
993 linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
994 enum dma_data_direction direction, unsigned long attrs __unused)
996 struct linux_dma_priv *priv;
997 struct scatterlist *sg;
999 bus_dma_segment_t seg;
1001 priv = dev->dma_priv;
1003 DMA_PRIV_LOCK(priv);
1005 /* create common DMA map in the first S/G entry */
1006 if (bus_dmamap_create(priv->dmat, 0, &sgl->dma_map) != 0) {
1007 DMA_PRIV_UNLOCK(priv);
1011 /* load all S/G list entries */
1012 for_each_sg(sgl, sg, nents, i) {
1014 if (_bus_dmamap_load_phys(priv->dmat, sgl->dma_map,
1015 sg_phys(sg), sg->length, BUS_DMA_NOWAIT,
1016 &seg, &nseg) != 0) {
1017 bus_dmamap_unload(priv->dmat, sgl->dma_map);
1018 bus_dmamap_destroy(priv->dmat, sgl->dma_map);
1019 DMA_PRIV_UNLOCK(priv);
1023 ("More than one segment (nseg=%d)", nseg + 1));
1025 sg_dma_address(sg) = seg.ds_addr;
1028 switch (direction) {
1029 case DMA_BIDIRECTIONAL:
1030 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE);
1033 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD);
1035 case DMA_FROM_DEVICE:
1036 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE);
1042 DMA_PRIV_UNLOCK(priv);
1048 linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
1049 int nents __unused, enum dma_data_direction direction,
1050 unsigned long attrs __unused)
1052 struct linux_dma_priv *priv;
1054 priv = dev->dma_priv;
1056 DMA_PRIV_LOCK(priv);
1058 switch (direction) {
1059 case DMA_BIDIRECTIONAL:
1060 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD);
1061 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD);
1064 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTWRITE);
1066 case DMA_FROM_DEVICE:
1067 bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD);
1073 bus_dmamap_unload(priv->dmat, sgl->dma_map);
1074 bus_dmamap_destroy(priv->dmat, sgl->dma_map);
1075 DMA_PRIV_UNLOCK(priv);
1079 struct device *pool_device;
1080 uma_zone_t pool_zone;
1081 struct mtx pool_lock;
1082 bus_dma_tag_t pool_dmat;
1083 size_t pool_entry_size;
1084 struct pctrie pool_ptree;
1087 #define DMA_POOL_LOCK(pool) mtx_lock(&(pool)->pool_lock)
1088 #define DMA_POOL_UNLOCK(pool) mtx_unlock(&(pool)->pool_lock)
1091 dma_pool_obj_ctor(void *mem, int size, void *arg, int flags)
1093 struct linux_dma_obj *obj = mem;
1094 struct dma_pool *pool = arg;
1096 bus_dma_segment_t seg;
1099 DMA_POOL_LOCK(pool);
1100 error = _bus_dmamap_load_phys(pool->pool_dmat, obj->dmamap,
1101 vtophys(obj->vaddr), pool->pool_entry_size, BUS_DMA_NOWAIT,
1103 DMA_POOL_UNLOCK(pool);
1107 KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg));
1108 obj->dma_addr = seg.ds_addr;
1114 dma_pool_obj_dtor(void *mem, int size, void *arg)
1116 struct linux_dma_obj *obj = mem;
1117 struct dma_pool *pool = arg;
1119 DMA_POOL_LOCK(pool);
1120 bus_dmamap_unload(pool->pool_dmat, obj->dmamap);
1121 DMA_POOL_UNLOCK(pool);
1125 dma_pool_obj_import(void *arg, void **store, int count, int domain __unused,
1128 struct dma_pool *pool = arg;
1129 struct linux_dma_obj *obj;
1132 for (i = 0; i < count; i++) {
1133 obj = uma_zalloc(linux_dma_obj_zone, flags);
1137 error = bus_dmamem_alloc(pool->pool_dmat, &obj->vaddr,
1138 BUS_DMA_NOWAIT, &obj->dmamap);
1140 uma_zfree(linux_dma_obj_zone, obj);
1151 dma_pool_obj_release(void *arg, void **store, int count)
1153 struct dma_pool *pool = arg;
1154 struct linux_dma_obj *obj;
1157 for (i = 0; i < count; i++) {
1159 bus_dmamem_free(pool->pool_dmat, obj->vaddr, obj->dmamap);
1160 uma_zfree(linux_dma_obj_zone, obj);
1165 linux_dma_pool_create(char *name, struct device *dev, size_t size,
1166 size_t align, size_t boundary)
1168 struct linux_dma_priv *priv;
1169 struct dma_pool *pool;
1171 priv = dev->dma_priv;
1173 pool = kzalloc(sizeof(*pool), GFP_KERNEL);
1174 pool->pool_device = dev;
1175 pool->pool_entry_size = size;
1177 if (bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
1178 align, boundary, /* alignment, boundary */
1179 priv->dma_mask, /* lowaddr */
1180 BUS_SPACE_MAXADDR, /* highaddr */
1181 NULL, NULL, /* filtfunc, filtfuncarg */
1184 size, /* maxsegsz */
1186 NULL, NULL, /* lockfunc, lockfuncarg */
1187 &pool->pool_dmat)) {
1192 pool->pool_zone = uma_zcache_create(name, -1, dma_pool_obj_ctor,
1193 dma_pool_obj_dtor, NULL, NULL, dma_pool_obj_import,
1194 dma_pool_obj_release, pool, 0);
1196 mtx_init(&pool->pool_lock, "lkpi-dma-pool", NULL, MTX_DEF);
1197 pctrie_init(&pool->pool_ptree);
1203 linux_dma_pool_destroy(struct dma_pool *pool)
1206 uma_zdestroy(pool->pool_zone);
1207 bus_dma_tag_destroy(pool->pool_dmat);
1208 mtx_destroy(&pool->pool_lock);
1213 lkpi_dmam_pool_destroy(struct device *dev, void *p)
1215 struct dma_pool *pool;
1217 pool = *(struct dma_pool **)p;
1218 LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree);
1219 linux_dma_pool_destroy(pool);
1223 linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
1226 struct linux_dma_obj *obj;
1228 obj = uma_zalloc_arg(pool->pool_zone, pool, mem_flags & GFP_NATIVE_MASK);
1232 DMA_POOL_LOCK(pool);
1233 if (LINUX_DMA_PCTRIE_INSERT(&pool->pool_ptree, obj) != 0) {
1234 DMA_POOL_UNLOCK(pool);
1235 uma_zfree_arg(pool->pool_zone, obj, pool);
1238 DMA_POOL_UNLOCK(pool);
1240 *handle = obj->dma_addr;
1241 return (obj->vaddr);
1245 linux_dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr)
1247 struct linux_dma_obj *obj;
1249 DMA_POOL_LOCK(pool);
1250 obj = LINUX_DMA_PCTRIE_LOOKUP(&pool->pool_ptree, dma_addr);
1252 DMA_POOL_UNLOCK(pool);
1255 LINUX_DMA_PCTRIE_REMOVE(&pool->pool_ptree, dma_addr);
1256 DMA_POOL_UNLOCK(pool);
1258 uma_zfree_arg(pool->pool_zone, obj, pool);
1262 linux_backlight_get_status(device_t dev, struct backlight_props *props)
1264 struct pci_dev *pdev;
1266 linux_set_current(curthread);
1267 pdev = device_get_softc(dev);
1269 props->brightness = pdev->dev.bd->props.brightness;
1270 props->brightness = props->brightness * 100 / pdev->dev.bd->props.max_brightness;
1277 linux_backlight_get_info(device_t dev, struct backlight_info *info)
1279 struct pci_dev *pdev;
1281 linux_set_current(curthread);
1282 pdev = device_get_softc(dev);
1284 info->type = BACKLIGHT_TYPE_PANEL;
1285 strlcpy(info->name, pdev->dev.bd->name, BACKLIGHTMAXNAMELENGTH);
1290 linux_backlight_update_status(device_t dev, struct backlight_props *props)
1292 struct pci_dev *pdev;
1294 linux_set_current(curthread);
1295 pdev = device_get_softc(dev);
1297 pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness *
1298 props->brightness / 100;
1299 pdev->dev.bd->props.power = props->brightness == 0 ?
1300 4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */;
1301 return (pdev->dev.bd->ops->update_status(pdev->dev.bd));
1304 struct backlight_device *
1305 linux_backlight_device_register(const char *name, struct device *dev,
1306 void *data, const struct backlight_ops *ops, struct backlight_properties *props)
1309 dev->bd = malloc(sizeof(*dev->bd), M_DEVBUF, M_WAITOK | M_ZERO);
1311 dev->bd->props.type = props->type;
1312 dev->bd->props.max_brightness = props->max_brightness;
1313 dev->bd->props.brightness = props->brightness;
1314 dev->bd->props.power = props->power;
1315 dev->bd->data = data;
1317 dev->bd->name = strdup(name, M_DEVBUF);
1319 dev->backlight_dev = backlight_register(name, dev->bsddev);
1325 linux_backlight_device_unregister(struct backlight_device *bd)
1328 backlight_destroy(bd->dev->backlight_dev);
1329 free(bd->name, M_DEVBUF);