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/*
* Copyright 2013 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Dave Airlie
* Alon Levy
*/
#include <linux/pci.h>
#include <drm/drm_irq.h>
#include "qxl_drv.h"
irqreturn_t qxl_irq_handler(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *) arg;
struct qxl_device *qdev = to_qxl(dev);
uint32_t pending;
pending = xchg(&qdev->ram_header->int_pending, 0);
if (!pending)
return IRQ_NONE;
atomic_inc(&qdev->irq_received);
if (pending & QXL_INTERRUPT_DISPLAY) {
atomic_inc(&qdev->irq_received_display);
wake_up_all(&qdev->display_event);
qxl_queue_garbage_collect(qdev, false);
}
if (pending & QXL_INTERRUPT_CURSOR) {
atomic_inc(&qdev->irq_received_cursor);
wake_up_all(&qdev->cursor_event);
}
if (pending & QXL_INTERRUPT_IO_CMD) {
atomic_inc(&qdev->irq_received_io_cmd);
wake_up_all(&qdev->io_cmd_event);
}
if (pending & QXL_INTERRUPT_ERROR) {
/* TODO: log it, reset device (only way to exit this condition)
* (do it a certain number of times, afterwards admit defeat,
* to avoid endless loops).
*/
qdev->irq_received_error++;
DRM_WARN("driver is in bug mode\n");
}
if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) {
schedule_work(&qdev->client_monitors_config_work);
}
qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ);
return IRQ_HANDLED;
}
static void qxl_client_monitors_config_work_func(struct work_struct *work)
{
struct qxl_device *qdev = container_of(work, struct qxl_device,
client_monitors_config_work);
qxl_display_read_client_monitors_config(qdev);
}
int qxl_irq_init(struct qxl_device *qdev)
{
int ret;
init_waitqueue_head(&qdev->display_event);
init_waitqueue_head(&qdev->cursor_event);
init_waitqueue_head(&qdev->io_cmd_event);
INIT_WORK(&qdev->client_monitors_config_work,
qxl_client_monitors_config_work_func);
atomic_set(&qdev->irq_received, 0);
atomic_set(&qdev->irq_received_display, 0);
atomic_set(&qdev->irq_received_cursor, 0);
atomic_set(&qdev->irq_received_io_cmd, 0);
qdev->irq_received_error = 0;
ret = drm_irq_install(&qdev->ddev, qdev->ddev.pdev->irq);
qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
if (unlikely(ret != 0)) {
DRM_ERROR("Failed installing irq: %d\n", ret);
return 1;
}
return 0;
}
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