1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2013 Red Hat Inc.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in
12*4882a593Smuzhiyun * all copies or substantial portions of the Software.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*4882a593Smuzhiyun * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE.
21*4882a593Smuzhiyun *
22*4882a593Smuzhiyun * Authors: Dave Airlie
23*4882a593Smuzhiyun * Alon Levy
24*4882a593Smuzhiyun */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include <linux/pci.h>
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #include <drm/drm_irq.h>
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #include "qxl_drv.h"
31*4882a593Smuzhiyun
qxl_irq_handler(int irq,void * arg)32*4882a593Smuzhiyun irqreturn_t qxl_irq_handler(int irq, void *arg)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun struct drm_device *dev = (struct drm_device *) arg;
35*4882a593Smuzhiyun struct qxl_device *qdev = to_qxl(dev);
36*4882a593Smuzhiyun uint32_t pending;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun pending = xchg(&qdev->ram_header->int_pending, 0);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (!pending)
41*4882a593Smuzhiyun return IRQ_NONE;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun atomic_inc(&qdev->irq_received);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (pending & QXL_INTERRUPT_DISPLAY) {
46*4882a593Smuzhiyun atomic_inc(&qdev->irq_received_display);
47*4882a593Smuzhiyun wake_up_all(&qdev->display_event);
48*4882a593Smuzhiyun qxl_queue_garbage_collect(qdev, false);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun if (pending & QXL_INTERRUPT_CURSOR) {
51*4882a593Smuzhiyun atomic_inc(&qdev->irq_received_cursor);
52*4882a593Smuzhiyun wake_up_all(&qdev->cursor_event);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun if (pending & QXL_INTERRUPT_IO_CMD) {
55*4882a593Smuzhiyun atomic_inc(&qdev->irq_received_io_cmd);
56*4882a593Smuzhiyun wake_up_all(&qdev->io_cmd_event);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun if (pending & QXL_INTERRUPT_ERROR) {
59*4882a593Smuzhiyun /* TODO: log it, reset device (only way to exit this condition)
60*4882a593Smuzhiyun * (do it a certain number of times, afterwards admit defeat,
61*4882a593Smuzhiyun * to avoid endless loops).
62*4882a593Smuzhiyun */
63*4882a593Smuzhiyun qdev->irq_received_error++;
64*4882a593Smuzhiyun DRM_WARN("driver is in bug mode\n");
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) {
67*4882a593Smuzhiyun schedule_work(&qdev->client_monitors_config_work);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
70*4882a593Smuzhiyun outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ);
71*4882a593Smuzhiyun return IRQ_HANDLED;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
qxl_client_monitors_config_work_func(struct work_struct * work)74*4882a593Smuzhiyun static void qxl_client_monitors_config_work_func(struct work_struct *work)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun struct qxl_device *qdev = container_of(work, struct qxl_device,
77*4882a593Smuzhiyun client_monitors_config_work);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun qxl_display_read_client_monitors_config(qdev);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
qxl_irq_init(struct qxl_device * qdev)82*4882a593Smuzhiyun int qxl_irq_init(struct qxl_device *qdev)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun int ret;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun init_waitqueue_head(&qdev->display_event);
87*4882a593Smuzhiyun init_waitqueue_head(&qdev->cursor_event);
88*4882a593Smuzhiyun init_waitqueue_head(&qdev->io_cmd_event);
89*4882a593Smuzhiyun INIT_WORK(&qdev->client_monitors_config_work,
90*4882a593Smuzhiyun qxl_client_monitors_config_work_func);
91*4882a593Smuzhiyun atomic_set(&qdev->irq_received, 0);
92*4882a593Smuzhiyun atomic_set(&qdev->irq_received_display, 0);
93*4882a593Smuzhiyun atomic_set(&qdev->irq_received_cursor, 0);
94*4882a593Smuzhiyun atomic_set(&qdev->irq_received_io_cmd, 0);
95*4882a593Smuzhiyun qdev->irq_received_error = 0;
96*4882a593Smuzhiyun ret = drm_irq_install(&qdev->ddev, qdev->ddev.pdev->irq);
97*4882a593Smuzhiyun qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
98*4882a593Smuzhiyun if (unlikely(ret != 0)) {
99*4882a593Smuzhiyun DRM_ERROR("Failed installing irq: %d\n", ret);
100*4882a593Smuzhiyun return 1;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun return 0;
103*4882a593Smuzhiyun }
104