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 | |
30 | #include "qxl_drv.h" |
31 | |
32 | static irqreturn_t qxl_irq_handler(int irq, void *arg) |
33 | { |
34 | struct drm_device *dev = (struct drm_device *) arg; |
35 | struct qxl_device *qdev = to_qxl(dev); |
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(v: &qdev->irq_received); |
44 | |
45 | if (pending & QXL_INTERRUPT_DISPLAY) { |
46 | atomic_inc(v: &qdev->irq_received_display); |
47 | wake_up_all(&qdev->display_event); |
48 | qxl_queue_garbage_collect(qdev, flush: false); |
49 | } |
50 | if (pending & QXL_INTERRUPT_CURSOR) { |
51 | atomic_inc(v: &qdev->irq_received_cursor); |
52 | wake_up_all(&qdev->cursor_event); |
53 | } |
54 | if (pending & QXL_INTERRUPT_IO_CMD) { |
55 | atomic_inc(v: &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(work: &qdev->client_monitors_config_work); |
68 | } |
69 | qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; |
70 | outb(value: 0, port: qdev->io_base + QXL_IO_UPDATE_IRQ); |
71 | return IRQ_HANDLED; |
72 | } |
73 | |
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 | |
82 | int qxl_irq_init(struct qxl_device *qdev) |
83 | { |
84 | struct drm_device *ddev = &qdev->ddev; |
85 | struct pci_dev *pdev = to_pci_dev(ddev->dev); |
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_waitqueue_head(&qdev->release_event); |
92 | INIT_WORK(&qdev->client_monitors_config_work, |
93 | qxl_client_monitors_config_work_func); |
94 | atomic_set(v: &qdev->irq_received, i: 0); |
95 | atomic_set(v: &qdev->irq_received_display, i: 0); |
96 | atomic_set(v: &qdev->irq_received_cursor, i: 0); |
97 | atomic_set(v: &qdev->irq_received_io_cmd, i: 0); |
98 | qdev->irq_received_error = 0; |
99 | ret = request_irq(irq: pdev->irq, handler: qxl_irq_handler, IRQF_SHARED, name: ddev->driver->name, dev: ddev); |
100 | qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; |
101 | if (unlikely(ret != 0)) { |
102 | DRM_ERROR("Failed installing irq: %d\n" , ret); |
103 | return 1; |
104 | } |
105 | return 0; |
106 | } |
107 | |