text: /* vim: set ts=8 sw=8 tw=78 ai noexpandtab */
  /* qxl_drv.c -- QXL driver -*- linux-c -*-
   *
   * Copyright 2011 Red Hat, Inc.
   * All Rights Reserved.
   *
   * 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 (including the next
   * paragraph) 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
   * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 <airlie@redhat.com>
   *    Alon Levy <alevy@redhat.com>
   */
  
  #include <linux/module.h>
  #include <linux/console.h>
  
  #include <drm/drmP.h>
  #include <drm/drm.h>
  #include <drm/drm_crtc_helper.h>
  #include "qxl_drv.h"
  #include "qxl_object.h"
  
  static const struct pci_device_id pciidlist[] = {
  	{ 0x1b36, 0x100, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8,
  	  0xffff00, 0 },
  	{ 0x1b36, 0x100, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_OTHER << 8,
  	  0xffff00, 0 },
  	{ 0, 0, 0 },
  };
  MODULE_DEVICE_TABLE(pci, pciidlist);
  
  static int qxl_modeset = -1;
  int qxl_num_crtc = 4;
  
  MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  module_param_named(modeset, qxl_modeset, int, 0400);
  
  MODULE_PARM_DESC(num_heads, "Number of virtual crtcs to expose (default 4)");
  module_param_named(num_heads, qxl_num_crtc, int, 0400);
  
  static struct drm_driver qxl_driver;
  static struct pci_driver qxl_pci_driver;
  
  static int
  qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  {
  	struct qxl_device *qdev;
  	int ret;
  
  	if (pdev->revision < 4) {
  		DRM_ERROR("qxl too old, doesn't support client_monitors_config,"
  			  " use xf86-video-qxl in user mode");
  		return -EINVAL; /* TODO: ENODEV ? */
  	}
  
  	qdev = kzalloc(sizeof(struct qxl_device), GFP_KERNEL);
  	if (!qdev)
  		return -ENOMEM;
  
  	ret = pci_enable_device(pdev);
  	if (ret)
  		goto free_dev;
  
  	ret = qxl_device_init(qdev, &qxl_driver, pdev);
  	if (ret)
  		goto disable_pci;
  
  	ret = qxl_modeset_init(qdev);
  	if (ret)
  		goto unload;
  
  	drm_kms_helper_poll_init(&qdev->ddev);
  
  	/* Complete initialization. */
  	ret = drm_dev_register(&qdev->ddev, ent->driver_data);
  	if (ret)
  		goto modeset_cleanup;
  
  	return 0;
  
  modeset_cleanup:
  	qxl_modeset_fini(qdev);
  unload:
  	qxl_device_fini(qdev);
  disable_pci:
  	pci_disable_device(pdev);
  free_dev:
  	kfree(qdev);
  	return ret;
  }
  
  static void
  qxl_pci_remove(struct pci_dev *pdev)
  {
  	struct drm_device *dev = pci_get_drvdata(pdev);
  	struct qxl_device *qdev = dev->dev_private;
  
  	drm_dev_unregister(dev);
  
  	qxl_modeset_fini(qdev);
  	qxl_device_fini(qdev);
  
  	dev->dev_private = NULL;
  	kfree(qdev);
  	drm_dev_unref(dev);
  }
  
  static const struct file_operations qxl_fops = {
  	.owner = THIS_MODULE,
  	.open = drm_open,
  	.release = drm_release,
  	.unlocked_ioctl = drm_ioctl,
  	.poll = drm_poll,
  	.read = drm_read,
  	.mmap = qxl_mmap,
  };
  
  static int qxl_drm_freeze(struct drm_device *dev)
  {
  	struct pci_dev *pdev = dev->pdev;
  	struct qxl_device *qdev = dev->dev_private;
  	struct drm_crtc *crtc;
  
  	drm_kms_helper_poll_disable(dev);
  
  	console_lock();
  	qxl_fbdev_set_suspend(qdev, 1);
  	console_unlock();
  
  	/* unpin the front buffers */
  	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
  		const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
  		if (crtc->enabled)
  			(*crtc_funcs->disable)(crtc);
  	}
  
  	qxl_destroy_monitors_object(qdev);
  	qxl_surf_evict(qdev);
  	qxl_vram_evict(qdev);
  
  	while (!qxl_check_idle(qdev->command_ring));
  	while (!qxl_check_idle(qdev->release_ring))
  		qxl_queue_garbage_collect(qdev, 1);
  
  	pci_save_state(pdev);
  
  	return 0;
  }
  
  static int qxl_drm_resume(struct drm_device *dev, bool thaw)
  {
  	struct qxl_device *qdev = dev->dev_private;
  
  	qdev->ram_header->int_mask = QXL_INTERRUPT_MASK;
  	if (!thaw) {
  		qxl_reinit_memslots(qdev);
  		qxl_ring_init_hdr(qdev->release_ring);
  	}
  
  	qxl_create_monitors_object(qdev);
  	drm_helper_resume_force_mode(dev);
  
  	console_lock();
  	qxl_fbdev_set_suspend(qdev, 0);
  	console_unlock();
  
  	drm_kms_helper_poll_enable(dev);
  	return 0;
  }
  
  static int qxl_pm_suspend(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct drm_device *drm_dev = pci_get_drvdata(pdev);
  	int error;
  
  	error = qxl_drm_freeze(drm_dev);
  	if (error)
  		return error;
  
  	pci_disable_device(pdev);
  	pci_set_power_state(pdev, PCI_D3hot);
  	return 0;
  }
  
  static int qxl_pm_resume(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct drm_device *drm_dev = pci_get_drvdata(pdev);
  
  	pci_set_power_state(pdev, PCI_D0);
  	pci_restore_state(pdev);
  	if (pci_enable_device(pdev)) {
  		return -EIO;
  	}
  
  	return qxl_drm_resume(drm_dev, false);
  }
  
  static int qxl_pm_thaw(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct drm_device *drm_dev = pci_get_drvdata(pdev);
  
  	return qxl_drm_resume(drm_dev, true);
  }
  
  static int qxl_pm_freeze(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct drm_device *drm_dev = pci_get_drvdata(pdev);
  
  	return qxl_drm_freeze(drm_dev);
  }
  
  static int qxl_pm_restore(struct device *dev)
  {
  	struct pci_dev *pdev = to_pci_dev(dev);
  	struct drm_device *drm_dev = pci_get_drvdata(pdev);
  	struct qxl_device *qdev = drm_dev->dev_private;
  
  	qxl_io_reset(qdev);
  	return qxl_drm_resume(drm_dev, false);
  }
  
  static const struct dev_pm_ops qxl_pm_ops = {
  	.suspend = qxl_pm_suspend,
  	.resume = qxl_pm_resume,
  	.freeze = qxl_pm_freeze,
  	.thaw = qxl_pm_thaw,
  	.poweroff = qxl_pm_freeze,
  	.restore = qxl_pm_restore,
  };
  static struct pci_driver qxl_pci_driver = {
  	 .name = DRIVER_NAME,
  	 .id_table = pciidlist,
  	 .probe = qxl_pci_probe,
  	 .remove = qxl_pci_remove,
  	 .driver.pm = &qxl_pm_ops,
  };
  
  static struct drm_driver qxl_driver = {
  	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  			   DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED |
  			   DRIVER_ATOMIC,
  
  	.dumb_create = qxl_mode_dumb_create,
  	.dumb_map_offset = qxl_mode_dumb_mmap,
  #if defined(CONFIG_DEBUG_FS)
  	.debugfs_init = qxl_debugfs_init,
  #endif
  	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  	.gem_prime_export = drm_gem_prime_export,
  	.gem_prime_import = drm_gem_prime_import,
  	.gem_prime_pin = qxl_gem_prime_pin,
  	.gem_prime_unpin = qxl_gem_prime_unpin,
  	.gem_prime_get_sg_table = qxl_gem_prime_get_sg_table,
  	.gem_prime_import_sg_table = qxl_gem_prime_import_sg_table,
  	.gem_prime_vmap = qxl_gem_prime_vmap,
  	.gem_prime_vunmap = qxl_gem_prime_vunmap,
  	.gem_prime_mmap = qxl_gem_prime_mmap,
  	.gem_free_object_unlocked = qxl_gem_object_free,
  	.gem_open_object = qxl_gem_object_open,
  	.gem_close_object = qxl_gem_object_close,
  	.fops = &qxl_fops,
  	.ioctls = qxl_ioctls,
  	.irq_handler = qxl_irq_handler,
  	.name = DRIVER_NAME,
  	.desc = DRIVER_DESC,
  	.date = DRIVER_DATE,
  	.major = 0,
  	.minor = 1,
  	.patchlevel = 0,
  };
  
  static int __init qxl_init(void)
  {
  	if (vgacon_text_force() && qxl_modeset == -1)
  		return -EINVAL;
  
  	if (qxl_modeset == 0)
  		return -EINVAL;
  	qxl_driver.num_ioctls = qxl_max_ioctls;
  	return pci_register_driver(&qxl_pci_driver);
  }
  
  static void __exit qxl_exit(void)
  {
  	pci_unregister_driver(&qxl_pci_driver);
  }
  
  module_init(qxl_init);
  module_exit(qxl_exit);
  
  MODULE_AUTHOR(DRIVER_AUTHOR);
  MODULE_DESCRIPTION(DRIVER_DESC);
  MODULE_LICENSE("GPL and additional rights");
  