/* $NetBSD: i915_pci.c,v 1.21 2018/08/27 14:49:22 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.c,v 1.21 2018/08/27 14:49:22 riastradh Exp $"); #include #include #include #include #include #include #include "i915_drv.h" #include "i915_pci.h" SIMPLEQ_HEAD(i915drmkms_task_head, i915drmkms_task); struct i915drmkms_softc { device_t sc_dev; struct pci_attach_args sc_pa; enum { I915DRMKMS_TASK_ATTACH, I915DRMKMS_TASK_WORKQUEUE, } sc_task_state; union { struct workqueue *workqueue; struct i915drmkms_task_head attach; } sc_task_u; struct drm_device *sc_drm_dev; struct pci_dev sc_pci_dev; }; static const struct intel_device_info * 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_drv.c. */ extern struct drm_driver *const i915_drm_driver; extern const struct pci_device_id *const i915_device_ids; extern const size_t i915_n_device_ids; static const struct intel_device_info * 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 intel_device_info *const info = (const void *)(uintptr_t)i915_device_ids[i].driver_data; if (IS_PRELIMINARY_HW(info)) { printf("i915drmkms: preliminary hardware support disabled\n"); return NULL; } return info; } 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; pci_aprint_devinfo(pa, NULL); if (!pmf_device_register(self, &i915drmkms_suspend, &i915drmkms_resume)) aprint_error_dev(self, "unable to establish power handler\n"); /* * Trivial initialization first; the rest will come after we * have mounted the root file system and can load firmware * images. */ sc->sc_dev = self; sc->sc_pa = *pa; 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 intel_device_info *const info = i915drmkms_pci_lookup(pa); const unsigned long cookie = (unsigned long)(uintptr_t)(const void *)info; int error; KASSERT(info != NULL); sc->sc_task_state = I915DRMKMS_TASK_ATTACH; SIMPLEQ_INIT(&sc->sc_task_u.attach); /* Initialize the Linux PCI device descriptor. */ linux_pci_dev_init(&sc->sc_pci_dev, self, device_parent(self), pa, 0); /* XXX errno Linux->NetBSD */ error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, i915_drm_driver, cookie, &sc->sc_drm_dev); if (error) { aprint_error_dev(self, "unable to attach drm: %d\n", error); return; } while (!SIMPLEQ_EMPTY(&sc->sc_task_u.attach)) { struct i915drmkms_task *const task = SIMPLEQ_FIRST(&sc->sc_task_u.attach); SIMPLEQ_REMOVE_HEAD(&sc->sc_task_u.attach, ift_u.queue); (*task->ift_fn)(task); } sc->sc_task_state = I915DRMKMS_TASK_WORKQUEUE; error = workqueue_create(&sc->sc_task_u.workqueue, "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_u.workqueue = NULL; return; } } 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; if (sc->sc_task_state == I915DRMKMS_TASK_ATTACH) goto out; if (sc->sc_task_u.workqueue != NULL) { workqueue_destroy(sc->sc_task_u.workqueue); sc->sc_task_u.workqueue = NULL; } if (sc->sc_drm_dev == NULL) goto out; /* XXX errno Linux->NetBSD */ error = -drm_pci_detach(sc->sc_drm_dev, flags); if (error) /* XXX Kinda too late to fail now... */ return error; sc->sc_drm_dev = NULL; out: linux_pci_dev_destroy(&sc->sc_pci_dev); pmf_device_deregister(self); 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; if (dev == NULL) return true; 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; if (dev == NULL) return true; ret = i915_drm_resume_early(dev); if (ret) return false; ret = i915_drm_resume(dev); if (ret) return false; return true; } 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); } int i915drmkms_task_schedule(device_t self, struct i915drmkms_task *task) { struct i915drmkms_softc *const sc = device_private(self); switch (sc->sc_task_state) { case I915DRMKMS_TASK_ATTACH: SIMPLEQ_INSERT_TAIL(&sc->sc_task_u.attach, task, ift_u.queue); return 0; case I915DRMKMS_TASK_WORKQUEUE: if (sc->sc_task_u.workqueue == NULL) { aprint_error_dev(self, "unable to schedule task\n"); return EIO; } workqueue_enqueue(sc->sc_task_u.workqueue, &task->ift_u.work, NULL); return 0; default: panic("i915drmkms in invalid task state: %d\n", (int)sc->sc_task_state); } }