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