/* $Id: vbox_irq.c 96407 2022-08-22 17:43:14Z vboxsync $ */ /** @file * VirtualBox Additions Linux kernel video driver */ /* * Copyright (C) 2016-2022 Oracle and/or its affiliates. * This file is based on qxl_irq.c * Copyright 2013 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Dave Airlie * Alon Levy * Michael Thayer */ #include "vbox_drv.h" #if RTLNX_VER_MAX(5,1,0) # include # if RTLNX_RHEL_MAJ_PREREQ(8,1) # include # endif #else # include #endif #include static void vbox_clear_irq(void) { outl((u32)~0, VGA_PORT_HGSMI_HOST); } static u32 vbox_get_flags(struct vbox_private *vbox) { return readl(vbox->guest_heap + HOST_FLAGS_OFFSET); } void vbox_report_hotplug(struct vbox_private *vbox) { schedule_work(&vbox->hotplug_work); } irqreturn_t vbox_irq_handler(int irq, void *arg) { struct drm_device *dev = (struct drm_device *)arg; struct vbox_private *vbox = (struct vbox_private *)dev->dev_private; u32 host_flags = vbox_get_flags(vbox); if (!(host_flags & HGSMIHOSTFLAGS_IRQ)) return IRQ_NONE; /* * Due to a bug in the initial host implementation of hot-plug irqs, * the hot-plug and cursor capability flags were never cleared. * Fortunately we can tell when they would have been set by checking * that the VSYNC flag is not set. */ if (host_flags & (HGSMIHOSTFLAGS_HOTPLUG | HGSMIHOSTFLAGS_CURSOR_CAPABILITIES) && !(host_flags & HGSMIHOSTFLAGS_VSYNC)) vbox_report_hotplug(vbox); vbox_clear_irq(); return IRQ_HANDLED; } /** * Check that the position hints provided by the host are suitable for GNOME * shell (i.e. all screens disjoint and hints for all enabled screens) and if * not replace them with default ones. Providing valid hints improves the * chances that we will get a known screen layout for pointer mapping. */ static void validate_or_set_position_hints(struct vbox_private *vbox) { struct VBVAMODEHINT *hintsi, *hintsj; bool valid = true; u16 currentx = 0; int i, j; for (i = 0; i < vbox->num_crtcs; ++i) { for (j = 0; j < i; ++j) { hintsi = &vbox->last_mode_hints[i]; hintsj = &vbox->last_mode_hints[j]; if (hintsi->fEnabled && hintsj->fEnabled) { if (hintsi->dx >= 0xffff || hintsi->dy >= 0xffff || hintsj->dx >= 0xffff || hintsj->dy >= 0xffff || (hintsi->dx < hintsj->dx + (hintsj->cx & 0x8fff) && hintsi->dx + (hintsi->cx & 0x8fff) > hintsj->dx) || (hintsi->dy < hintsj->dy + (hintsj->cy & 0x8fff) && hintsi->dy + (hintsi->cy & 0x8fff) > hintsj->dy)) valid = false; } } } if (!valid) for (i = 0; i < vbox->num_crtcs; ++i) { if (vbox->last_mode_hints[i].fEnabled) { vbox->last_mode_hints[i].dx = currentx; vbox->last_mode_hints[i].dy = 0; currentx += vbox->last_mode_hints[i].cx & 0x8fff; } } } /** * Query the host for the most recent video mode hints. */ static void vbox_update_mode_hints(struct vbox_private *vbox) { struct drm_device *dev = vbox->dev; struct drm_connector *connector; struct vbox_connector *vbox_conn; struct VBVAMODEHINT *hints; u16 flags; bool disconnected; unsigned int crtc_id; int ret; ret = VBoxHGSMIGetModeHints(vbox->guest_pool, vbox->num_crtcs, vbox->last_mode_hints); if (ret) { DRM_ERROR("vboxvideo: hgsmi_get_mode_hints failed: %d\n", ret); return; } validate_or_set_position_hints(vbox); #if RTLNX_VER_MIN(3,9,0) drm_modeset_lock_all(dev); #else mutex_lock(&dev->mode_config.mutex); #endif list_for_each_entry(connector, &dev->mode_config.connector_list, head) { vbox_conn = to_vbox_connector(connector); hints = &vbox->last_mode_hints[vbox_conn->vbox_crtc->crtc_id]; if (hints->magic != VBVAMODEHINT_MAGIC) continue; disconnected = !(hints->fEnabled); crtc_id = vbox_conn->vbox_crtc->crtc_id; vbox_conn->mode_hint.width = hints->cx; vbox_conn->mode_hint.height = hints->cy; vbox_conn->vbox_crtc->x_hint = hints->dx; vbox_conn->vbox_crtc->y_hint = hints->dy; vbox_conn->mode_hint.disconnected = disconnected; if (vbox_conn->vbox_crtc->disconnected == disconnected) continue; if (disconnected) flags = VBVA_SCREEN_F_ACTIVE | VBVA_SCREEN_F_DISABLED; else flags = VBVA_SCREEN_F_ACTIVE | VBVA_SCREEN_F_BLANK; VBoxHGSMIProcessDisplayInfo(vbox->guest_pool, crtc_id, 0, 0, 0, hints->cx * 4, hints->cx, hints->cy, 0, flags); vbox_conn->vbox_crtc->disconnected = disconnected; } #if RTLNX_VER_MIN(3,9,0) drm_modeset_unlock_all(dev); #else mutex_unlock(&dev->mode_config.mutex); #endif } static void vbox_hotplug_worker(struct work_struct *work) { struct vbox_private *vbox = container_of(work, struct vbox_private, hotplug_work); vbox_update_mode_hints(vbox); drm_kms_helper_hotplug_event(vbox->dev); } int vbox_irq_init(struct vbox_private *vbox) { INIT_WORK(&vbox->hotplug_work, vbox_hotplug_worker); vbox_update_mode_hints(vbox); #if RTLNX_VER_MIN(5,15,0) || RTLNX_RHEL_MAJ_PREREQ(9,1) return request_irq(VBOX_DRM_TO_PCI_DEV(vbox->dev)->irq, vbox_irq_handler, IRQF_SHARED, vbox->dev->driver->name, vbox->dev); #elif RTLNX_VER_MIN(3,16,0) || RTLNX_RHEL_MAJ_PREREQ(7,1) return drm_irq_install(vbox->dev, VBOX_DRM_TO_PCI_DEV(vbox->dev)->irq); #else return drm_irq_install(vbox->dev); #endif } void vbox_irq_fini(struct vbox_private *vbox) { #if RTLNX_VER_MIN(5,15,0) || RTLNX_RHEL_MAJ_PREREQ(9,1) free_irq(VBOX_DRM_TO_PCI_DEV(vbox->dev)->irq, vbox->dev); #else drm_irq_uninstall(vbox->dev); #endif flush_work(&vbox->hotplug_work); }