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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | /* * 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 */ #include <linux/pci.h> #include <drm/drm_drv.h> #include "qxl_drv.h" static irqreturn_t qxl_irq_handler(int irq, void *arg) { struct drm_device *dev = (struct drm_device *) arg; struct qxl_device *qdev = to_qxl(dev); uint32_t pending; pending = xchg(&qdev->ram_header->int_pending, 0); if (!pending) return IRQ_NONE; atomic_inc(&qdev->irq_received); if (pending & QXL_INTERRUPT_DISPLAY) { atomic_inc(&qdev->irq_received_display); wake_up_all(&qdev->display_event); qxl_queue_garbage_collect(qdev, false); } if (pending & QXL_INTERRUPT_CURSOR) { atomic_inc(&qdev->irq_received_cursor); wake_up_all(&qdev->cursor_event); } if (pending & QXL_INTERRUPT_IO_CMD) { atomic_inc(&qdev->irq_received_io_cmd); wake_up_all(&qdev->io_cmd_event); } if (pending & QXL_INTERRUPT_ERROR) { /* TODO: log it, reset device (only way to exit this condition) * (do it a certain number of times, afterwards admit defeat, * to avoid endless loops). */ qdev->irq_received_error++; DRM_WARN("driver is in bug mode\n"); } if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) { schedule_work(&qdev->client_monitors_config_work); } qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ); return IRQ_HANDLED; } static void qxl_client_monitors_config_work_func(struct work_struct *work) { struct qxl_device *qdev = container_of(work, struct qxl_device, client_monitors_config_work); qxl_display_read_client_monitors_config(qdev); } int qxl_irq_init(struct qxl_device *qdev) { struct drm_device *ddev = &qdev->ddev; struct pci_dev *pdev = to_pci_dev(ddev->dev); int ret; init_waitqueue_head(&qdev->display_event); init_waitqueue_head(&qdev->cursor_event); init_waitqueue_head(&qdev->io_cmd_event); init_waitqueue_head(&qdev->release_event); INIT_WORK(&qdev->client_monitors_config_work, qxl_client_monitors_config_work_func); atomic_set(&qdev->irq_received, 0); atomic_set(&qdev->irq_received_display, 0); atomic_set(&qdev->irq_received_cursor, 0); atomic_set(&qdev->irq_received_io_cmd, 0); qdev->irq_received_error = 0; ret = request_irq(pdev->irq, qxl_irq_handler, IRQF_SHARED, ddev->driver->name, ddev); qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; if (unlikely(ret != 0)) { DRM_ERROR("Failed installing irq: %d\n", ret); return 1; } return 0; } |