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_drv.h> 29 #include <drm/drm_print.h> 30 31 #include "qxl_drv.h" 32 33 static irqreturn_t qxl_irq_handler(int irq, void *arg) 34 { 35 struct drm_device *dev = (struct drm_device *) arg; 36 struct qxl_device *qdev = to_qxl(dev); 37 uint32_t pending; 38 39 pending = xchg(&qdev->ram_header->int_pending, 0); 40 41 if (!pending) 42 return IRQ_NONE; 43 44 atomic_inc(&qdev->irq_received); 45 46 if (pending & QXL_INTERRUPT_DISPLAY) { 47 atomic_inc(&qdev->irq_received_display); 48 wake_up_all(&qdev->display_event); 49 qxl_queue_garbage_collect(qdev, false); 50 } 51 if (pending & QXL_INTERRUPT_CURSOR) { 52 atomic_inc(&qdev->irq_received_cursor); 53 wake_up_all(&qdev->cursor_event); 54 } 55 if (pending & QXL_INTERRUPT_IO_CMD) { 56 atomic_inc(&qdev->irq_received_io_cmd); 57 wake_up_all(&qdev->io_cmd_event); 58 } 59 if (pending & QXL_INTERRUPT_ERROR) { 60 /* TODO: log it, reset device (only way to exit this condition) 61 * (do it a certain number of times, afterwards admit defeat, 62 * to avoid endless loops). 63 */ 64 qdev->irq_received_error++; 65 DRM_WARN("driver is in bug mode\n"); 66 } 67 if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) { 68 schedule_work(&qdev->client_monitors_config_work); 69 } 70 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 71 outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ); 72 return IRQ_HANDLED; 73 } 74 75 static void qxl_client_monitors_config_work_func(struct work_struct *work) 76 { 77 struct qxl_device *qdev = container_of(work, struct qxl_device, 78 client_monitors_config_work); 79 80 qxl_display_read_client_monitors_config(qdev); 81 } 82 83 int qxl_irq_init(struct qxl_device *qdev) 84 { 85 struct drm_device *ddev = &qdev->ddev; 86 struct pci_dev *pdev = to_pci_dev(ddev->dev); 87 int ret; 88 89 init_waitqueue_head(&qdev->display_event); 90 init_waitqueue_head(&qdev->cursor_event); 91 init_waitqueue_head(&qdev->io_cmd_event); 92 init_waitqueue_head(&qdev->release_event); 93 INIT_WORK(&qdev->client_monitors_config_work, 94 qxl_client_monitors_config_work_func); 95 atomic_set(&qdev->irq_received, 0); 96 atomic_set(&qdev->irq_received_display, 0); 97 atomic_set(&qdev->irq_received_cursor, 0); 98 atomic_set(&qdev->irq_received_io_cmd, 0); 99 qdev->irq_received_error = 0; 100 ret = request_irq(pdev->irq, qxl_irq_handler, IRQF_SHARED, ddev->driver->name, ddev); 101 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 102 if (unlikely(ret != 0)) { 103 DRM_ERROR("Failed installing irq: %d\n", ret); 104 return 1; 105 } 106 return 0; 107 } 108