/* $NetBSD: amdgpu_pci.c,v 1.12 2023/08/07 16:34:47 riastradh Exp $ */ /*- * Copyright (c) 2018 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: amdgpu_pci.c,v 1.12 2023/08/07 16:34:47 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include "amdgpu_drv.h" #include "amdgpu_task.h" struct drm_device; SIMPLEQ_HEAD(amdgpu_task_head, amdgpu_task); struct amdgpu_softc { device_t sc_dev; struct pci_attach_args sc_pa; struct lwp *sc_task_thread; struct amdgpu_task_head sc_tasks; struct workqueue *sc_task_wq; struct drm_device *sc_drm_dev; struct pci_dev sc_pci_dev; bool sc_pci_attached; bool sc_dev_registered; }; static bool amdgpu_pci_lookup(const struct pci_attach_args *, unsigned long *); static int amdgpu_match(device_t, cfdata_t, void *); static void amdgpu_attach(device_t, device_t, void *); static void amdgpu_attach_real(device_t); static int amdgpu_detach(device_t, int); static bool amdgpu_do_suspend(device_t, const pmf_qual_t *); static bool amdgpu_do_resume(device_t, const pmf_qual_t *); static void amdgpu_task_work(struct work *, void *); CFATTACH_DECL_NEW(amdgpu, sizeof(struct amdgpu_softc), amdgpu_match, amdgpu_attach, amdgpu_detach, NULL); /* XXX Kludge to get these from amdgpu_drv.c. */ extern struct drm_driver *const amdgpu_drm_driver; extern const struct pci_device_id *const amdgpu_device_ids; extern const size_t amdgpu_n_device_ids; static bool amdgpu_pci_lookup(const struct pci_attach_args *pa, unsigned long *flags) { size_t i; for (i = 0; i < amdgpu_n_device_ids; i++) { if ((PCI_VENDOR(pa->pa_id) == amdgpu_device_ids[i].vendor) && (PCI_PRODUCT(pa->pa_id) == amdgpu_device_ids[i].device)) break; } /* Did we find it? */ if (i == amdgpu_n_device_ids) return false; if (flags) *flags = amdgpu_device_ids[i].driver_data; return true; } static int amdgpu_match(device_t parent, cfdata_t match, void *aux) { extern int amdgpu_guarantee_initialized(void); const struct pci_attach_args *const pa = aux; int error; error = amdgpu_guarantee_initialized(); if (error) { aprint_error("amdgpu: failed to initialize: %d\n", error); return 0; } if (!amdgpu_pci_lookup(pa, NULL)) return 0; return 7; /* beat genfb_pci and radeon */ } static void amdgpu_attach(device_t parent, device_t self, void *aux) { struct amdgpu_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, device_parent(self), 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, "amdgpufb", &amdgpu_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, &amdgpu_attach_real); } static void amdgpu_attach_real(device_t self) { struct amdgpu_softc *const sc = device_private(self); const struct pci_attach_args *const pa = &sc->sc_pa; bool ok __diagused; unsigned long flags = 0; /* XXXGCC */ int error; ok = amdgpu_pci_lookup(pa, &flags); KASSERT(ok); /* * Cause any tasks issued synchronously during attach to be * processed at the end of this function. */ sc->sc_task_thread = curlwp; sc->sc_drm_dev = drm_dev_alloc(amdgpu_drm_driver, self); if (IS_ERR(sc->sc_drm_dev)) { aprint_error_dev(self, "unable to create drm device: %ld\n", PTR_ERR(sc->sc_drm_dev)); sc->sc_drm_dev = NULL; goto out; } /* XXX errno Linux->NetBSD */ error = -drm_pci_attach(sc->sc_drm_dev, &sc->sc_pci_dev); if (error) { aprint_error_dev(self, "unable to attach drm: %d\n", error); goto out; } sc->sc_pci_attached = true; /* XXX errno Linux->NetBSD */ error = -drm_dev_register(sc->sc_drm_dev, flags); if (error) { aprint_error_dev(self, "unable to register drm: %d\n", error); goto out; } sc->sc_dev_registered = true; if (!pmf_device_register(self, &amdgpu_do_suspend, &amdgpu_do_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 amdgpu_task *const task = SIMPLEQ_FIRST(&sc->sc_tasks); SIMPLEQ_REMOVE_HEAD(&sc->sc_tasks, rt_u.queue); (*task->rt_fn)(task); } out: /* Cause any subesquent tasks to be processed by the workqueue. */ atomic_store_relaxed(&sc->sc_task_thread, NULL); } static int amdgpu_detach(device_t self, int flags) { struct amdgpu_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_dev_registered) drm_dev_unregister(sc->sc_drm_dev); if (sc->sc_pci_attached) drm_pci_detach(sc->sc_drm_dev); if (sc->sc_drm_dev) { drm_dev_put(sc->sc_drm_dev); 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 amdgpu_do_suspend(device_t self, const pmf_qual_t *qual) { struct amdgpu_softc *const sc = device_private(self); struct drm_device *const dev = sc->sc_drm_dev; int ret; drm_suspend_ioctl(dev); ret = amdgpu_device_suspend(dev, /*fbcon*/true); if (ret) return false; return true; } static bool amdgpu_do_resume(device_t self, const pmf_qual_t *qual) { struct amdgpu_softc *const sc = device_private(self); struct drm_device *const dev = sc->sc_drm_dev; int ret; ret = amdgpu_device_resume(dev, /*fbcon*/true); if (ret) goto out; out: drm_resume_ioctl(dev); return ret == 0; } static void amdgpu_task_work(struct work *work, void *cookie __unused) { struct amdgpu_task *const task = container_of(work, struct amdgpu_task, rt_u.work); (*task->rt_fn)(task); } void amdgpu_task_schedule(device_t self, struct amdgpu_task *task) { struct amdgpu_softc *const sc = device_private(self); if (atomic_load_relaxed(&sc->sc_task_thread) == curlwp) SIMPLEQ_INSERT_TAIL(&sc->sc_tasks, task, rt_u.queue); else workqueue_enqueue(sc->sc_task_wq, &task->rt_u.work, NULL); }