/* $NetBSD: i915_pci_autoconf.c,v 1.14 2022/10/15 15:20:06 riastradh Exp $ */ /*- * Copyright (c) 2013 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Taylor R. Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: i915_pci_autoconf.c,v 1.14 2022/10/15 15:20:06 riastradh Exp $"); #include #include #include #include #include #include #include #include #include "i915_drv.h" #include "i915_pci.h" struct drm_device; SIMPLEQ_HEAD(i915drmkms_task_head, i915drmkms_task); struct i915drmkms_softc { device_t sc_dev; struct pci_attach_args sc_pa; struct lwp *sc_task_thread; struct i915drmkms_task_head sc_tasks; struct workqueue *sc_task_wq; struct drm_device *sc_drm_dev; struct pci_dev sc_pci_dev; }; static const struct pci_device_id * i915drmkms_pci_lookup(const struct pci_attach_args *); static int i915drmkms_match(device_t, cfdata_t, void *); static void i915drmkms_attach(device_t, device_t, void *); static void i915drmkms_attach_real(device_t); static int i915drmkms_detach(device_t, int); static bool i915drmkms_suspend(device_t, const pmf_qual_t *); static bool i915drmkms_resume(device_t, const pmf_qual_t *); static void i915drmkms_task_work(struct work *, void *); CFATTACH_DECL_NEW(i915drmkms, sizeof(struct i915drmkms_softc), i915drmkms_match, i915drmkms_attach, i915drmkms_detach, NULL); /* XXX Kludge to get these from i915_pci.c. */ extern const struct pci_device_id *const i915_device_ids; extern const size_t i915_n_device_ids; static const struct pci_device_id * i915drmkms_pci_lookup(const struct pci_attach_args *pa) { size_t i; /* Attach only at function 0 to work around Intel lossage. */ if (pa->pa_function != 0) return NULL; /* We're interested only in Intel products. */ if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) return NULL; /* We're interested only in Intel display devices. */ if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) return NULL; for (i = 0; i < i915_n_device_ids; i++) if (PCI_PRODUCT(pa->pa_id) == i915_device_ids[i].device) break; /* Did we find it? */ if (i == i915_n_device_ids) return NULL; const struct pci_device_id *ent = &i915_device_ids[i]; const struct intel_device_info *const info = (struct intel_device_info *)ent->driver_data; if (info->require_force_probe) { printf("i915drmkms: preliminary hardware support disabled\n"); return NULL; } return ent; } static int i915drmkms_match(device_t parent, cfdata_t match, void *aux) { extern int i915drmkms_guarantee_initialized(void); const struct pci_attach_args *const pa = aux; int error; error = i915drmkms_guarantee_initialized(); if (error) { aprint_error("i915drmkms: failed to initialize: %d\n", error); return 0; } if (i915drmkms_pci_lookup(pa) == NULL) return 0; return 6; /* XXX Beat genfb_pci... */ } static void i915drmkms_attach(device_t parent, device_t self, void *aux) { struct i915drmkms_softc *const sc = device_private(self); const struct pci_attach_args *const pa = aux; int error; pci_aprint_devinfo(pa, NULL); /* Initialize the Linux PCI device descriptor. */ linux_pci_dev_init(&sc->sc_pci_dev, self, parent, pa, 0); sc->sc_dev = self; sc->sc_pa = *pa; sc->sc_task_thread = NULL; SIMPLEQ_INIT(&sc->sc_tasks); error = workqueue_create(&sc->sc_task_wq, "intelfb", &i915drmkms_task_work, NULL, PRI_NONE, IPL_NONE, WQ_MPSAFE); if (error) { aprint_error_dev(self, "unable to create workqueue: %d\n", error); sc->sc_task_wq = NULL; return; } /* * Defer the remainder of initialization until we have mounted * the root file system and can load firmware images. */ config_mountroot(self, &i915drmkms_attach_real); } static void i915drmkms_attach_real(device_t self) { struct i915drmkms_softc *const sc = device_private(self); struct pci_attach_args *const pa = &sc->sc_pa; const struct pci_device_id *ent = i915drmkms_pci_lookup(pa); const struct intel_device_info *const info __diagused = (struct intel_device_info *)ent->driver_data; int error; KASSERT(info != NULL); /* * Cause any tasks issued synchronously during attach to be * processed at the end of this function. */ sc->sc_task_thread = curlwp; /* Attach the drm driver. */ /* XXX errno Linux->NetBSD */ error = -i915_driver_probe(&sc->sc_pci_dev, ent); if (error) { aprint_error_dev(self, "unable to register drm: %d\n", error); return; } sc->sc_drm_dev = pci_get_drvdata(&sc->sc_pci_dev); /* * Now that the drm driver is attached, we can safely suspend * and resume. */ if (!pmf_device_register(self, &i915drmkms_suspend, &i915drmkms_resume)) aprint_error_dev(self, "unable to establish power handler\n"); /* * Process asynchronous tasks queued synchronously during * attach. This will be for display detection to attach a * framebuffer, so we have the opportunity for a console device * to attach before autoconf has completed, in time for init(8) * to find that console without panicking. */ while (!SIMPLEQ_EMPTY(&sc->sc_tasks)) { struct i915drmkms_task *const task = SIMPLEQ_FIRST(&sc->sc_tasks); SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, ift_u.queue); (*task->ift_fn)(task); } /* Cause any subesquent tasks to be processed by the workqueue. */ atomic_store_relaxed(&sc->sc_task_thread, NULL); } static int i915drmkms_detach(device_t self, int flags) { struct i915drmkms_softc *const sc = device_private(self); int error; /* XXX Check for in-use before tearing it all down... */ error = config_detach_children(self, flags); if (error) return error; KASSERT(sc->sc_task_thread == NULL); KASSERT(SIMPLEQ_EMPTY(&sc->sc_tasks)); pmf_device_deregister(self); if (sc->sc_drm_dev) { i915_driver_remove(sc->sc_drm_dev->dev_private); sc->sc_drm_dev = NULL; } if (sc->sc_task_wq) { workqueue_destroy(sc->sc_task_wq); sc->sc_task_wq = NULL; } linux_pci_dev_destroy(&sc->sc_pci_dev); return 0; } static bool i915drmkms_suspend(device_t self, const pmf_qual_t *qual) { struct i915drmkms_softc *const sc = device_private(self); struct drm_device *const dev = sc->sc_drm_dev; int ret; drm_suspend_ioctl(dev); ret = i915_drm_prepare(dev); if (ret) return false; ret = i915_drm_suspend(dev); if (ret) return false; ret = i915_drm_suspend_late(dev, false); if (ret) return false; return true; } static bool i915drmkms_resume(device_t self, const pmf_qual_t *qual) { struct i915drmkms_softc *const sc = device_private(self); struct drm_device *const dev = sc->sc_drm_dev; int ret; ret = i915_drm_resume_early(dev); if (ret) goto out; ret = i915_drm_resume(dev); if (ret) goto out; out: drm_resume_ioctl(dev); return ret == 0; } static void i915drmkms_task_work(struct work *work, void *cookie __unused) { struct i915drmkms_task *const task = container_of(work, struct i915drmkms_task, ift_u.work); (*task->ift_fn)(task); } void i915drmkms_task_schedule(device_t self, struct i915drmkms_task *task) { struct i915drmkms_softc *const sc = device_private(self); if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp) SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, ift_u.queue); else workqueue_enqueue(sc->sc_task_wq, &task->ift_u.work, NULL); }