diff options
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_irq.c')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_irq.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_irq.c b/drivers/gpu/drm/qxl/qxl_irq.c new file mode 100644 index 000000000..665278ee3 --- /dev/null +++ b/drivers/gpu/drm/qxl/qxl_irq.c @@ -0,0 +1,106 @@ +/* + * 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_drv.h> + +#include "qxl_drv.h" + +static 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) +{ + struct drm_device *ddev = &qdev->ddev; + struct pci_dev *pdev = to_pci_dev(ddev->dev); + int ret; + + init_waitqueue_head(&qdev->display_event); + init_waitqueue_head(&qdev->cursor_event); + init_waitqueue_head(&qdev->io_cmd_event); + init_waitqueue_head(&qdev->release_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 = request_irq(pdev->irq, qxl_irq_handler, IRQF_SHARED, ddev->driver->name, ddev); + qdev->ram_header->int_mask = QXL_INTERRUPT_MASK; + if (unlikely(ret != 0)) { + DRM_ERROR("Failed installing irq: %d\n", ret); + return 1; + } + return 0; +} |