1 /* $NetBSD: qxl_irq.c,v 1.3 2018/08/27 07:03:26 riastradh Exp $ */ 2 3 /* 4 * Copyright 2013 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alon Levy 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: qxl_irq.c,v 1.3 2018/08/27 07:03:26 riastradh Exp $"); 30 31 #include "qxl_drv.h" 32 33 irqreturn_t qxl_irq_handler(int irq, void *arg) 34 { 35 struct drm_device *dev = (struct drm_device *) arg; 36 struct qxl_device *qdev = (struct qxl_device *)dev->dev_private; 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 qxl_io_log(qdev, "%s: driver is in bug mode.\n", __func__); 66 } 67 if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) { 68 qxl_io_log(qdev, "QXL_INTERRUPT_CLIENT_MONITORS_CONFIG\n"); 69 schedule_work(&qdev->client_monitors_config_work); 70 } 71 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 72 outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ); 73 return IRQ_HANDLED; 74 } 75 76 static void qxl_client_monitors_config_work_func(struct work_struct *work) 77 { 78 struct qxl_device *qdev = container_of(work, struct qxl_device, 79 client_monitors_config_work); 80 81 qxl_display_read_client_monitors_config(qdev); 82 } 83 84 int qxl_irq_init(struct qxl_device *qdev) 85 { 86 int ret; 87 88 init_waitqueue_head(&qdev->display_event); 89 init_waitqueue_head(&qdev->cursor_event); 90 init_waitqueue_head(&qdev->io_cmd_event); 91 INIT_WORK(&qdev->client_monitors_config_work, 92 qxl_client_monitors_config_work_func); 93 atomic_set(&qdev->irq_received, 0); 94 atomic_set(&qdev->irq_received_display, 0); 95 atomic_set(&qdev->irq_received_cursor, 0); 96 atomic_set(&qdev->irq_received_io_cmd, 0); 97 qdev->irq_received_error = 0; 98 #ifdef __NetBSD__ 99 ret = drm_irq_install(qdev->ddev); 100 #else 101 ret = drm_irq_install(qdev->ddev, qdev->ddev->pdev->irq); 102 #endif 103 qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; 104 if (unlikely(ret != 0)) { 105 DRM_ERROR("Failed installing irq: %d\n", ret); 106 return 1; 107 } 108 return 0; 109 } 110