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 "qxl_drv.h" 27 28 irqreturn_t qxl_irq_handler(int irq, void *arg) 29 { 30 struct drm_device *dev = (struct drm_device *) arg; 31 struct qxl_device *qdev = (struct qxl_device *)dev->dev_private; 32 uint32_t pending; 33 34 pending = xchg(&qdev->ram_header->int_pending, 0); 35 36 if (!pending) 37 return IRQ_NONE; 38 39 atomic_inc(&qdev->irq_received); 40 41 if (pending & QXL_INTERRUPT_DISPLAY) { 42 atomic_inc(&qdev->irq_received_display); 43 wake_up_all(&qdev->display_event); 44 qxl_queue_garbage_collect(qdev, false); 45 } 46 if (pending & QXL_INTERRUPT_CURSOR) { 47 atomic_inc(&qdev->irq_received_cursor); 48 wake_up_all(&qdev->cursor_event); 49 } 50 if (pending & QXL_INTERRUPT_IO_CMD) { 51 atomic_inc(&qdev->irq_received_io_cmd); 52 wake_up_all(&qdev->io_cmd_event); 53 } 54 if (pending & QXL_INTERRUPT_ERROR) { 55 /* TODO: log it, reset device (only way to exit this condition) 56 * (do it a certain number of times, afterwards admit defeat, 57 * to avoid endless loops). 58 */ 59 qdev->irq_received_error++; 60 qxl_io_log(qdev, "%s: driver is in bug mode.\n", __func__); 61 } 62 if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) { 63 qxl_io_log(qdev, "QXL_INTERRUPT_CLIENT_MONITORS_CONFIG\n"); 64 schedule_work(&qdev->client_monitors_config_work); 65 } 66 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 67 outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ); 68 return IRQ_HANDLED; 69 } 70 71 static void qxl_client_monitors_config_work_func(struct work_struct *work) 72 { 73 struct qxl_device *qdev = container_of(work, struct qxl_device, 74 client_monitors_config_work); 75 76 qxl_display_read_client_monitors_config(qdev); 77 } 78 79 int qxl_irq_init(struct qxl_device *qdev) 80 { 81 int ret; 82 83 init_waitqueue_head(&qdev->display_event); 84 init_waitqueue_head(&qdev->cursor_event); 85 init_waitqueue_head(&qdev->io_cmd_event); 86 INIT_WORK(&qdev->client_monitors_config_work, 87 qxl_client_monitors_config_work_func); 88 atomic_set(&qdev->irq_received, 0); 89 atomic_set(&qdev->irq_received_display, 0); 90 atomic_set(&qdev->irq_received_cursor, 0); 91 atomic_set(&qdev->irq_received_io_cmd, 0); 92 qdev->irq_received_error = 0; 93 ret = drm_irq_install(qdev->ddev, qdev->ddev->pdev->irq); 94 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 95 if (unlikely(ret != 0)) { 96 DRM_ERROR("Failed installing irq: %d\n", ret); 97 return 1; 98 } 99 return 0; 100 } 101