LXR linux/drivers/gpu/drm/qxl/qxl

   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 "qxl_drv.h"
  27
  28irqreturn_t qxl_irq_handler(DRM_IRQ_ARGS)
  29{
  30        struct drm_device *dev = (struct drm_device *) arg;
  31        struct qxl_device *qdev = (struct qxl_device *)dev->dev_private;
  32        uint32_t pending;
  33
  34        pending = xchg(&qdev->ram_header->int_pending, 0);
  35
  36        atomic_inc(&qdev->irq_received);
  37
  38        if (pending & QXL_INTERRUPT_DISPLAY) {
  39                atomic_inc(&qdev->irq_received_display);
  40                wake_up_all(&qdev->display_event);
  41                qxl_queue_garbage_collect(qdev, false);
  42        }
  43        if (pending & QXL_INTERRUPT_CURSOR) {
  44                atomic_inc(&qdev->irq_received_cursor);
  45                wake_up_all(&qdev->cursor_event);
  46        }
  47        if (pending & QXL_INTERRUPT_IO_CMD) {
  48                atomic_inc(&qdev->irq_received_io_cmd);
  49                wake_up_all(&qdev->io_cmd_event);
  50        }
  51        if (pending & QXL_INTERRUPT_ERROR) {
  52                /* TODO: log it, reset device (only way to exit this condition)
  53                 * (do it a certain number of times, afterwards admit defeat,
  54                 * to avoid endless loops).
  55                 */
  56                qdev->irq_received_error++;
  57                qxl_io_log(qdev, "%s: driver is in bug mode.\n", __func__);
  58        }
  59        if (pending & QXL_INTERRUPT_CLIENT_MONITORS_CONFIG) {
  60                qxl_io_log(qdev, "QXL_INTERRUPT_CLIENT_MONITORS_CONFIG\n");
  61                schedule_work(&qdev->client_monitors_config_work);
  62        }
  63        qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
  64        outb(0, qdev->io_base + QXL_IO_UPDATE_IRQ);
  65        return IRQ_HANDLED;
  66}
  67
  68static void qxl_client_monitors_config_work_func(struct work_struct *work)
  69{
  70        struct qxl_device *qdev = container_of(work, struct qxl_device,
  71                                               client_monitors_config_work);
  72
  73        qxl_display_read_client_monitors_config(qdev);
  74}
  75
  76int qxl_irq_init(struct qxl_device *qdev)
  77{
  78        int ret;
  79
  80        init_waitqueue_head(&qdev->display_event);
  81        init_waitqueue_head(&qdev->cursor_event);
  82        init_waitqueue_head(&qdev->io_cmd_event);
  83        INIT_WORK(&qdev->client_monitors_config_work,
  84                  qxl_client_monitors_config_work_func);
  85        atomic_set(&qdev->irq_received, 0);
  86        atomic_set(&qdev->irq_received_display, 0);
  87        atomic_set(&qdev->irq_received_cursor, 0);
  88        atomic_set(&qdev->irq_received_io_cmd, 0);
  89        qdev->irq_received_error = 0;
  90        ret = drm_irq_install(qdev->ddev);
  91        qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
  92        if (unlikely(ret != 0)) {
  93                DRM_ERROR("Failed installing irq: %d\n", ret);
  94                return 1;
  95        }
  96        return 0;
  97}
  98