1 /* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Dave Airlie 23 * Alon Levy 24 */ 25 26 #include <linux/pci.h> 27 28 #include <drm/drm_irq.h> 29 30 #include "qxl_drv.h" 31 32 irqreturn_t qxl_irq_handler(int irq, void *arg) 33 { 34 struct drm_device *dev = (struct drm_device *) arg; 35 struct qxl_device *qdev = (struct qxl_device *)dev->dev_private; 36 uint32_t pending; 37 38 pending = xchg(&qdev->ram_header->int_pending, 0); 39 40 if (!pending) 41 return IRQ_NONE; 42 43 atomic_inc(&qdev->irq_received); 44 45 if (pending & QXL_INTERRUPT_DISPLAY) { 46 atomic_inc(&qdev->irq_received_display); 47 wake_up_all(&qdev->display_event); 48 qxl_queue_garbage_collect(qdev, false); 49 } 50 if (pending & QXL_INTERRUPT_CURSOR) { 51 atomic_inc(&qdev->irq_received_cursor); 52 wake_up_all(&qdev->cursor_event); 53 } 54 if (pending & QXL_INTERRUPT_IO_CMD) { 55 atomic_inc(&qdev->irq_received_io_cmd); 56 wake_up_all(&qdev->io_cmd_event); 57 } 58 if (pending & QXL_INTERRUPT_ERROR) { 59 /* TODO: log it, reset device (only way to exit this condition) 60 * (do it a certain number of times, afterwards admit defeat, 61 * to avoid endless loops). 62 */ 63 qdev->irq_received_error++; 64 DRM_WARN("driver is in bug mode\n"); 65 } 66 if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) { 67 schedule_work(&qdev->client_monitors_config_work); 68 } 69 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 70 outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ); 71 return IRQ_HANDLED; 72 } 73 74 static void qxl_client_monitors_config_work_func(struct work_struct *work) 75 { 76 struct qxl_device *qdev = container_of(work, struct qxl_device, 77 client_monitors_config_work); 78 79 qxl_display_read_client_monitors_config(qdev); 80 } 81 82 int qxl_irq_init(struct qxl_device *qdev) 83 { 84 int ret; 85 86 init_waitqueue_head(&qdev->display_event); 87 init_waitqueue_head(&qdev->cursor_event); 88 init_waitqueue_head(&qdev->io_cmd_event); 89 INIT_WORK(&qdev->client_monitors_config_work, 90 qxl_client_monitors_config_work_func); 91 atomic_set(&qdev->irq_received, 0); 92 atomic_set(&qdev->irq_received_display, 0); 93 atomic_set(&qdev->irq_received_cursor, 0); 94 atomic_set(&qdev->irq_received_io_cmd, 0); 95 qdev->irq_received_error = 0; 96 ret = drm_irq_install(&qdev->ddev, qdev->ddev.pdev->irq); 97 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 98 if (unlikely(ret != 0)) { 99 DRM_ERROR("Failed installing irq: %d\n", ret); 100 return 1; 101 } 102 return 0; 103 } 104