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1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Dave Airlie23 * Alon Levy24 */25 26#include <linux/pci.h>27 28#include <drm/drm_drv.h>29 30#include "qxl_drv.h"31 32static 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(&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 74static 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 82int 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(&qdev->irq_received, 0);95 atomic_set(&qdev->irq_received_display, 0);96 atomic_set(&qdev->irq_received_cursor, 0);97 atomic_set(&qdev->irq_received_io_cmd, 0);98 qdev->irq_received_error = 0;99 ret = request_irq(pdev->irq, qxl_irq_handler, IRQF_SHARED, ddev->driver->name, 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