/* $Id: vbox_irq.c 68334 2017-08-08 09:26:39Z vboxsync $ */ /** @file * VirtualBox Additions Linux kernel video driver */ /* * Copyright (C) 2016-2017 Oracle Corporation * 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" #include #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) { int i, j; u16 currentx = 0; bool valid = true; for (i = 0; i < vbox->num_crtcs; ++i) { for (j = 0; j < i; ++j) { struct VBVAMODEHINT *hintsi = &vbox->last_mode_hints[i]; struct VBVAMODEHINT *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_connector; struct VBVAMODEHINT *hints; u16 flags; bool disconnected; unsigned int crtc_id; int rc; rc = VBoxHGSMIGetModeHints(vbox->guest_pool, vbox->num_crtcs, vbox->last_mode_hints); if (RT_FAILURE(rc)) { DRM_ERROR("vboxvideo: VBoxHGSMIGetModeHints failed, rc=%i.\n", rc); return; } validate_or_set_position_hints(vbox); #if LINUX_VERSION_CODE >= KERNEL_VERSION(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_connector = to_vbox_connector(connector); hints = &vbox->last_mode_hints[vbox_connector->vbox_crtc->crtc_id]; if (hints->magic == VBVAMODEHINT_MAGIC) { disconnected = !(hints->fEnabled); crtc_id = vbox_connector->vbox_crtc->crtc_id; flags = VBVA_SCREEN_F_ACTIVE | (disconnected ? VBVA_SCREEN_F_DISABLED : VBVA_SCREEN_F_BLANK); vbox_connector->mode_hint.width = hints->cx & 0x8fff; vbox_connector->mode_hint.height = hints->cy & 0x8fff; vbox_connector->vbox_crtc->x_hint = hints->dx; vbox_connector->vbox_crtc->y_hint = hints->dy; vbox_connector->mode_hint.disconnected = disconnected; if (vbox_connector->vbox_crtc->disconnected != disconnected) { VBoxHGSMIProcessDisplayInfo(vbox->guest_pool, crtc_id, 0, 0, 0, hints->cx * 4, hints->cx, hints->cy, 0, flags); vbox_connector->vbox_crtc->disconnected = disconnected; } } } #if LINUX_VERSION_CODE >= KERNEL_VERSION(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) { int ret; vbox_update_mode_hints(vbox); #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0) || defined(RHEL_73) ret = drm_irq_install(vbox->dev, vbox->dev->pdev->irq); #else ret = drm_irq_install(vbox->dev); #endif if (unlikely(ret != 0)) { vbox_irq_fini(vbox); DRM_ERROR("Failed installing irq: %d\n", ret); return 1; } INIT_WORK(&vbox->hotplug_work, vbox_hotplug_worker); vbox->isr_installed = true; return 0; } void vbox_irq_fini(struct vbox_private *vbox) { if (vbox->isr_installed) { drm_irq_uninstall(vbox->dev); flush_work(&vbox->hotplug_work); vbox->isr_installed = false; } }