520 lines
12 KiB
C
520 lines
12 KiB
C
/**
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* \file drm_stub.h
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* Stub support
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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*/
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/*
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* Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
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*
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* Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/slab.h>
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#include "drmP.h"
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#include "drm_core.h"
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unsigned int drm_debug = 0; /* 1 to enable debug output */
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EXPORT_SYMBOL(drm_debug);
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unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
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EXPORT_SYMBOL(drm_vblank_offdelay);
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unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
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EXPORT_SYMBOL(drm_timestamp_precision);
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MODULE_AUTHOR(CORE_AUTHOR);
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MODULE_DESCRIPTION(CORE_DESC);
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MODULE_LICENSE("GPL and additional rights");
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MODULE_PARM_DESC(debug, "Enable debug output");
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MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
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MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
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module_param_named(debug, drm_debug, int, 0600);
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module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
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module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
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struct idr drm_minors_idr;
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struct class *drm_class;
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struct proc_dir_entry *drm_proc_root;
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struct dentry *drm_debugfs_root;
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int drm_err(const char *func, const char *format, ...)
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{
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struct va_format vaf;
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va_list args;
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int r;
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va_start(args, format);
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vaf.fmt = format;
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vaf.va = &args;
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r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
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va_end(args);
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return r;
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}
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EXPORT_SYMBOL(drm_err);
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void drm_ut_debug_printk(unsigned int request_level,
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const char *prefix,
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const char *function_name,
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const char *format, ...)
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{
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va_list args;
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if (drm_debug & request_level) {
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if (function_name)
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printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
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va_start(args, format);
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vprintk(format, args);
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va_end(args);
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}
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}
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EXPORT_SYMBOL(drm_ut_debug_printk);
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static int drm_minor_get_id(struct drm_device *dev, int type)
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{
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int new_id;
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int ret;
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int base = 0, limit = 63;
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if (type == DRM_MINOR_CONTROL) {
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base += 64;
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limit = base + 127;
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} else if (type == DRM_MINOR_RENDER) {
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base += 128;
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limit = base + 255;
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}
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again:
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if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
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DRM_ERROR("Out of memory expanding drawable idr\n");
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return -ENOMEM;
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}
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mutex_lock(&dev->struct_mutex);
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ret = idr_get_new_above(&drm_minors_idr, NULL,
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base, &new_id);
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mutex_unlock(&dev->struct_mutex);
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if (ret == -EAGAIN)
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goto again;
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else if (ret)
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return ret;
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if (new_id >= limit) {
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idr_remove(&drm_minors_idr, new_id);
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return -EINVAL;
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}
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return new_id;
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}
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struct drm_master *drm_master_create(struct drm_minor *minor)
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{
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struct drm_master *master;
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master = kzalloc(sizeof(*master), GFP_KERNEL);
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if (!master)
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return NULL;
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kref_init(&master->refcount);
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spin_lock_init(&master->lock.spinlock);
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init_waitqueue_head(&master->lock.lock_queue);
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drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
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INIT_LIST_HEAD(&master->magicfree);
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master->minor = minor;
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list_add_tail(&master->head, &minor->master_list);
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return master;
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}
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struct drm_master *drm_master_get(struct drm_master *master)
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{
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kref_get(&master->refcount);
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return master;
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}
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EXPORT_SYMBOL(drm_master_get);
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static void drm_master_destroy(struct kref *kref)
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{
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struct drm_master *master = container_of(kref, struct drm_master, refcount);
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struct drm_magic_entry *pt, *next;
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struct drm_device *dev = master->minor->dev;
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struct drm_map_list *r_list, *list_temp;
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list_del(&master->head);
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if (dev->driver->master_destroy)
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dev->driver->master_destroy(dev, master);
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list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
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if (r_list->master == master) {
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drm_rmmap_locked(dev, r_list->map);
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r_list = NULL;
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}
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}
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if (master->unique) {
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kfree(master->unique);
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master->unique = NULL;
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master->unique_len = 0;
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}
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kfree(dev->devname);
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dev->devname = NULL;
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list_for_each_entry_safe(pt, next, &master->magicfree, head) {
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list_del(&pt->head);
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drm_ht_remove_item(&master->magiclist, &pt->hash_item);
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kfree(pt);
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}
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drm_ht_remove(&master->magiclist);
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kfree(master);
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}
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void drm_master_put(struct drm_master **master)
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{
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kref_put(&(*master)->refcount, drm_master_destroy);
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*master = NULL;
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}
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EXPORT_SYMBOL(drm_master_put);
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int drm_setmaster_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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int ret = 0;
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if (file_priv->is_master)
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return 0;
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if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
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return -EINVAL;
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if (!file_priv->master)
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return -EINVAL;
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if (!file_priv->minor->master &&
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file_priv->minor->master != file_priv->master) {
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mutex_lock(&dev->struct_mutex);
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file_priv->minor->master = drm_master_get(file_priv->master);
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file_priv->is_master = 1;
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if (dev->driver->master_set) {
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ret = dev->driver->master_set(dev, file_priv, false);
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if (unlikely(ret != 0)) {
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file_priv->is_master = 0;
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drm_master_put(&file_priv->minor->master);
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}
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}
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mutex_unlock(&dev->struct_mutex);
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}
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return 0;
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}
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int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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if (!file_priv->is_master)
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return -EINVAL;
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if (!file_priv->minor->master)
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return -EINVAL;
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mutex_lock(&dev->struct_mutex);
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if (dev->driver->master_drop)
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dev->driver->master_drop(dev, file_priv, false);
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drm_master_put(&file_priv->minor->master);
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file_priv->is_master = 0;
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mutex_unlock(&dev->struct_mutex);
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return 0;
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}
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int drm_fill_in_dev(struct drm_device *dev,
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const struct pci_device_id *ent,
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struct drm_driver *driver)
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{
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int retcode;
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INIT_LIST_HEAD(&dev->filelist);
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INIT_LIST_HEAD(&dev->ctxlist);
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INIT_LIST_HEAD(&dev->vmalist);
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INIT_LIST_HEAD(&dev->maplist);
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INIT_LIST_HEAD(&dev->vblank_event_list);
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spin_lock_init(&dev->count_lock);
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spin_lock_init(&dev->event_lock);
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mutex_init(&dev->struct_mutex);
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mutex_init(&dev->ctxlist_mutex);
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if (drm_ht_create(&dev->map_hash, 12)) {
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return -ENOMEM;
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}
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/* the DRM has 6 basic counters */
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dev->counters = 6;
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dev->types[0] = _DRM_STAT_LOCK;
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dev->types[1] = _DRM_STAT_OPENS;
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dev->types[2] = _DRM_STAT_CLOSES;
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dev->types[3] = _DRM_STAT_IOCTLS;
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dev->types[4] = _DRM_STAT_LOCKS;
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dev->types[5] = _DRM_STAT_UNLOCKS;
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dev->driver = driver;
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if (dev->driver->bus->agp_init) {
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retcode = dev->driver->bus->agp_init(dev);
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if (retcode)
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goto error_out_unreg;
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}
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retcode = drm_ctxbitmap_init(dev);
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if (retcode) {
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DRM_ERROR("Cannot allocate memory for context bitmap.\n");
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goto error_out_unreg;
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}
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if (driver->driver_features & DRIVER_GEM) {
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retcode = drm_gem_init(dev);
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if (retcode) {
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DRM_ERROR("Cannot initialize graphics execution "
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"manager (GEM)\n");
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goto error_out_unreg;
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}
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}
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return 0;
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error_out_unreg:
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drm_lastclose(dev);
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return retcode;
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}
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EXPORT_SYMBOL(drm_fill_in_dev);
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/**
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* Get a secondary minor number.
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*
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* \param dev device data structure
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* \param sec-minor structure to hold the assigned minor
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* \return negative number on failure.
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*
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* Search an empty entry and initialize it to the given parameters, and
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* create the proc init entry via proc_init(). This routines assigns
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* minor numbers to secondary heads of multi-headed cards
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*/
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int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
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{
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struct drm_minor *new_minor;
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int ret;
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int minor_id;
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DRM_DEBUG("\n");
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minor_id = drm_minor_get_id(dev, type);
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if (minor_id < 0)
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return minor_id;
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new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
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if (!new_minor) {
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ret = -ENOMEM;
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goto err_idr;
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}
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new_minor->type = type;
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new_minor->device = MKDEV(DRM_MAJOR, minor_id);
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new_minor->dev = dev;
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new_minor->index = minor_id;
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INIT_LIST_HEAD(&new_minor->master_list);
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idr_replace(&drm_minors_idr, new_minor, minor_id);
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if (type == DRM_MINOR_LEGACY) {
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ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
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if (ret) {
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DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
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goto err_mem;
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}
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} else
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new_minor->proc_root = NULL;
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#if defined(CONFIG_DEBUG_FS)
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ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
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if (ret) {
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DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
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goto err_g2;
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}
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#endif
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ret = drm_sysfs_device_add(new_minor);
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if (ret) {
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printk(KERN_ERR
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"DRM: Error sysfs_device_add.\n");
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goto err_g2;
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}
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*minor = new_minor;
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DRM_DEBUG("new minor assigned %d\n", minor_id);
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return 0;
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err_g2:
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if (new_minor->type == DRM_MINOR_LEGACY)
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drm_proc_cleanup(new_minor, drm_proc_root);
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err_mem:
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kfree(new_minor);
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err_idr:
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idr_remove(&drm_minors_idr, minor_id);
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*minor = NULL;
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return ret;
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}
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EXPORT_SYMBOL(drm_get_minor);
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/**
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* Put a secondary minor number.
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*
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* \param sec_minor - structure to be released
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* \return always zero
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*
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* Cleans up the proc resources. Not legal for this to be the
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* last minor released.
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*
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*/
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int drm_put_minor(struct drm_minor **minor_p)
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{
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struct drm_minor *minor = *minor_p;
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DRM_DEBUG("release secondary minor %d\n", minor->index);
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if (minor->type == DRM_MINOR_LEGACY)
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drm_proc_cleanup(minor, drm_proc_root);
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#if defined(CONFIG_DEBUG_FS)
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drm_debugfs_cleanup(minor);
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#endif
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drm_sysfs_device_remove(minor);
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idr_remove(&drm_minors_idr, minor->index);
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kfree(minor);
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*minor_p = NULL;
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return 0;
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}
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EXPORT_SYMBOL(drm_put_minor);
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static void drm_unplug_minor(struct drm_minor *minor)
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{
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drm_sysfs_device_remove(minor);
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}
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/**
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* Called via drm_exit() at module unload time or when pci device is
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* unplugged.
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*
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* Cleans up all DRM device, calling drm_lastclose().
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*
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*/
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void drm_put_dev(struct drm_device *dev)
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{
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struct drm_driver *driver;
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struct drm_map_list *r_list, *list_temp;
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DRM_DEBUG("\n");
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if (!dev) {
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DRM_ERROR("cleanup called no dev\n");
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return;
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}
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driver = dev->driver;
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drm_lastclose(dev);
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if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
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dev->agp && dev->agp->agp_mtrr >= 0) {
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int retval;
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retval = mtrr_del(dev->agp->agp_mtrr,
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dev->agp->agp_info.aper_base,
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dev->agp->agp_info.aper_size * 1024 * 1024);
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DRM_DEBUG("mtrr_del=%d\n", retval);
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}
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if (dev->driver->unload)
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dev->driver->unload(dev);
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if (drm_core_has_AGP(dev) && dev->agp) {
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kfree(dev->agp);
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dev->agp = NULL;
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}
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drm_vblank_cleanup(dev);
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list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
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drm_rmmap(dev, r_list->map);
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drm_ht_remove(&dev->map_hash);
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drm_ctxbitmap_cleanup(dev);
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if (drm_core_check_feature(dev, DRIVER_MODESET))
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drm_put_minor(&dev->control);
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if (driver->driver_features & DRIVER_GEM)
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drm_gem_destroy(dev);
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drm_put_minor(&dev->primary);
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list_del(&dev->driver_item);
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if (dev->devname) {
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kfree(dev->devname);
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dev->devname = NULL;
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}
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kfree(dev);
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}
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EXPORT_SYMBOL(drm_put_dev);
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void drm_unplug_dev(struct drm_device *dev)
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{
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/* for a USB device */
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if (drm_core_check_feature(dev, DRIVER_MODESET))
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drm_unplug_minor(dev->control);
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drm_unplug_minor(dev->primary);
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mutex_lock(&drm_global_mutex);
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drm_device_set_unplugged(dev);
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if (dev->open_count == 0) {
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drm_put_dev(dev);
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}
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mutex_unlock(&drm_global_mutex);
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}
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EXPORT_SYMBOL(drm_unplug_dev);
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