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
qxl_irq_handler(int irq,void * arg)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
qxl_client_monitors_config_work_func(struct work_struct * work)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
qxl_irq_init(struct qxl_device * qdev)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