Logo Search packages:      
Sourcecode: linux version File versions  Download package

drm_stub.c

/**
 * \file drm_stub.h
 * Stub support
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 */

/*
 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
 *
 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
 * 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
 * PRECISION INSIGHT 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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include "drmP.h"
#include "drm_core.h"

unsigned int drm_cards_limit = 16;  /* Enough for one machine */
unsigned int drm_debug = 0;   /* 1 to enable debug output */
EXPORT_SYMBOL(drm_debug);

MODULE_AUTHOR(CORE_AUTHOR);
MODULE_DESCRIPTION(CORE_DESC);
MODULE_LICENSE("GPL and additional rights");
MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
MODULE_PARM_DESC(debug, "Enable debug output");

module_param_named(cards_limit, drm_cards_limit, int, 0444);
module_param_named(debug, drm_debug, int, 0600);

struct drm_head **drm_heads;
struct class *drm_class;
struct proc_dir_entry *drm_proc_root;

static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
                     const struct pci_device_id *ent,
                     struct drm_driver *driver)
{
      int retcode;

      INIT_LIST_HEAD(&dev->filelist);
      INIT_LIST_HEAD(&dev->ctxlist);
      INIT_LIST_HEAD(&dev->vmalist);
      INIT_LIST_HEAD(&dev->maplist);

      spin_lock_init(&dev->count_lock);
      spin_lock_init(&dev->drw_lock);
      spin_lock_init(&dev->tasklet_lock);
      spin_lock_init(&dev->lock.spinlock);
      init_timer(&dev->timer);
      mutex_init(&dev->struct_mutex);
      mutex_init(&dev->ctxlist_mutex);

      idr_init(&dev->drw_idr);

      dev->pdev = pdev;
      dev->pci_device = pdev->device;
      dev->pci_vendor = pdev->vendor;

#ifdef __alpha__
      dev->hose = pdev->sysdata;
#endif
      dev->irq = pdev->irq;

      if (drm_ht_create(&dev->map_hash, 12)) {
            return -ENOMEM;
      }

      /* the DRM has 6 basic counters */
      dev->counters = 6;
      dev->types[0] = _DRM_STAT_LOCK;
      dev->types[1] = _DRM_STAT_OPENS;
      dev->types[2] = _DRM_STAT_CLOSES;
      dev->types[3] = _DRM_STAT_IOCTLS;
      dev->types[4] = _DRM_STAT_LOCKS;
      dev->types[5] = _DRM_STAT_UNLOCKS;

      dev->driver = driver;

      if (dev->driver->load)
            if ((retcode = dev->driver->load(dev, ent->driver_data)))
                  goto error_out_unreg;

      if (drm_core_has_AGP(dev)) {
            if (drm_device_is_agp(dev))
                  dev->agp = drm_agp_init(dev);
            if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
                && (dev->agp == NULL)) {
                  DRM_ERROR("Cannot initialize the agpgart module.\n");
                  retcode = -EINVAL;
                  goto error_out_unreg;
            }
            if (drm_core_has_MTRR(dev)) {
                  if (dev->agp)
                        dev->agp->agp_mtrr =
                            mtrr_add(dev->agp->agp_info.aper_base,
                                   dev->agp->agp_info.aper_size *
                                   1024 * 1024, MTRR_TYPE_WRCOMB, 1);
            }
      }

      retcode = drm_ctxbitmap_init(dev);
      if (retcode) {
            DRM_ERROR("Cannot allocate memory for context bitmap.\n");
            goto error_out_unreg;
      }

      return 0;

      error_out_unreg:
      drm_lastclose(dev);
      return retcode;
}


/**
 * Get a secondary minor number.
 *
 * \param dev device data structure
 * \param sec-minor structure to hold the assigned minor
 * \return negative number on failure.
 *
 * Search an empty entry and initialize it to the given parameters, and
 * create the proc init entry via proc_init(). This routines assigns
 * minor numbers to secondary heads of multi-headed cards
 */
static int drm_get_head(struct drm_device * dev, struct drm_head * head)
{
      struct drm_head **heads = drm_heads;
      int ret;
      int minor;

      DRM_DEBUG("\n");

      for (minor = 0; minor < drm_cards_limit; minor++, heads++) {
            if (!*heads) {

                  *head = (struct drm_head) {
                  .dev = dev,.device =
                            MKDEV(DRM_MAJOR, minor),.minor = minor,};

                  if ((ret =
                       drm_proc_init(dev, minor, drm_proc_root,
                                 &head->dev_root))) {
                        printk(KERN_ERR
                               "DRM: Failed to initialize /proc/dri.\n");
                        goto err_g1;
                  }

                  head->dev_class = drm_sysfs_device_add(drm_class, head);
                  if (IS_ERR(head->dev_class)) {
                        printk(KERN_ERR
                               "DRM: Error sysfs_device_add.\n");
                        ret = PTR_ERR(head->dev_class);
                        goto err_g2;
                  }
                  *heads = head;

                  DRM_DEBUG("new minor assigned %d\n", minor);
                  return 0;
            }
      }
      DRM_ERROR("out of minors\n");
      return -ENOMEM;
      err_g2:
      drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
      err_g1:
      *head = (struct drm_head) {
      .dev = NULL};
      return ret;
}

/**
 * Register.
 *
 * \param pdev - PCI device structure
 * \param ent entry from the PCI ID table with device type flags
 * \return zero on success or a negative number on failure.
 *
 * Attempt to gets inter module "drm" information. If we are first
 * then register the character device and inter module information.
 * Try and register, if we fail to register, backout previous work.
 */
int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
            struct drm_driver *driver)
{
      struct drm_device *dev;
      int ret;

      DRM_DEBUG("\n");

      dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
      if (!dev)
            return -ENOMEM;

      ret = pci_enable_device(pdev);
      if (ret)
            goto err_g1;

      pci_set_master(pdev);
      if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
            printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
            goto err_g2;
      }
      if ((ret = drm_get_head(dev, &dev->primary)))
            goto err_g2;
      
      DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
             driver->name, driver->major, driver->minor, driver->patchlevel,
             driver->date, dev->primary.minor);

      return 0;

err_g2:
      pci_disable_device(pdev);
err_g1:
      drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
      return ret;
}

/**
 * Put a device minor number.
 *
 * \param dev device data structure
 * \return always zero
 *
 * Cleans up the proc resources. If it is the last minor then release the foreign
 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
 * unregisters the character device.
 */
int drm_put_dev(struct drm_device * dev)
{
      DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);

      if (dev->unique) {
            drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
            dev->unique = NULL;
            dev->unique_len = 0;
      }
      if (dev->devname) {
            drm_free(dev->devname, strlen(dev->devname) + 1,
                   DRM_MEM_DRIVER);
            dev->devname = NULL;
      }
      drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
      return 0;
}

/**
 * Put a secondary minor number.
 *
 * \param sec_minor - structure to be released
 * \return always zero
 *
 * Cleans up the proc resources. Not legal for this to be the
 * last minor released.
 *
 */
int drm_put_head(struct drm_head * head)
{
      int minor = head->minor;

      DRM_DEBUG("release secondary minor %d\n", minor);

      drm_proc_cleanup(minor, drm_proc_root, head->dev_root);
      drm_sysfs_device_remove(head->dev_class);

      *head = (struct drm_head) {.dev = NULL};

      drm_heads[minor] = NULL;

      return 0;
}

Generated by  Doxygen 1.6.0   Back to index