diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/gpu/drm/drm_fops.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/gpu/drm/drm_fops.c | 674 |
1 files changed, 0 insertions, 674 deletions
diff --git a/ANDROID_3.4.5/drivers/gpu/drm/drm_fops.c b/ANDROID_3.4.5/drivers/gpu/drm/drm_fops.c deleted file mode 100644 index 123de28f..00000000 --- a/ANDROID_3.4.5/drivers/gpu/drm/drm_fops.c +++ /dev/null @@ -1,674 +0,0 @@ -/** - * \file drm_fops.c - * File operations for DRM - * - * \author Rickard E. (Rik) Faith <faith@valinux.com> - * \author Daryll Strauss <daryll@valinux.com> - * \author Gareth Hughes <gareth@valinux.com> - */ - -/* - * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com - * - * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. - * Copyright 2000 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 - * 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. - */ - -#include "drmP.h" -#include <linux/poll.h> -#include <linux/slab.h> -#include <linux/module.h> - -/* from BKL pushdown: note that nothing else serializes idr_find() */ -DEFINE_MUTEX(drm_global_mutex); -EXPORT_SYMBOL(drm_global_mutex); - -static int drm_open_helper(struct inode *inode, struct file *filp, - struct drm_device * dev); - -static int drm_setup(struct drm_device * dev) -{ - int i; - int ret; - - if (dev->driver->firstopen) { - ret = dev->driver->firstopen(dev); - if (ret != 0) - return ret; - } - - atomic_set(&dev->ioctl_count, 0); - atomic_set(&dev->vma_count, 0); - - if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && - !drm_core_check_feature(dev, DRIVER_MODESET)) { - dev->buf_use = 0; - atomic_set(&dev->buf_alloc, 0); - - i = drm_dma_setup(dev); - if (i < 0) - return i; - } - - for (i = 0; i < ARRAY_SIZE(dev->counts); i++) - atomic_set(&dev->counts[i], 0); - - dev->sigdata.lock = NULL; - - dev->queue_count = 0; - dev->queue_reserved = 0; - dev->queue_slots = 0; - dev->queuelist = NULL; - dev->context_flag = 0; - dev->interrupt_flag = 0; - dev->dma_flag = 0; - dev->last_context = 0; - dev->last_switch = 0; - dev->last_checked = 0; - init_waitqueue_head(&dev->context_wait); - dev->if_version = 0; - - dev->ctx_start = 0; - dev->lck_start = 0; - - dev->buf_async = NULL; - init_waitqueue_head(&dev->buf_readers); - init_waitqueue_head(&dev->buf_writers); - - DRM_DEBUG("\n"); - - /* - * The kernel's context could be created here, but is now created - * in drm_dma_enqueue. This is more resource-efficient for - * hardware that does not do DMA, but may mean that - * drm_select_queue fails between the time the interrupt is - * initialized and the time the queues are initialized. - */ - - return 0; -} - -/** - * Open file. - * - * \param inode device inode - * \param filp file pointer. - * \return zero on success or a negative number on failure. - * - * Searches the DRM device with the same minor number, calls open_helper(), and - * increments the device open count. If the open count was previous at zero, - * i.e., it's the first that the device is open, then calls setup(). - */ -int drm_open(struct inode *inode, struct file *filp) -{ - struct drm_device *dev = NULL; - int minor_id = iminor(inode); - struct drm_minor *minor; - int retcode = 0; - - minor = idr_find(&drm_minors_idr, minor_id); - if (!minor) - return -ENODEV; - - if (!(dev = minor->dev)) - return -ENODEV; - - if (drm_device_is_unplugged(dev)) - return -ENODEV; - - retcode = drm_open_helper(inode, filp, dev); - if (!retcode) { - atomic_inc(&dev->counts[_DRM_STAT_OPENS]); - if (!dev->open_count++) - retcode = drm_setup(dev); - } - if (!retcode) { - mutex_lock(&dev->struct_mutex); - if (minor->type == DRM_MINOR_LEGACY) { - if (dev->dev_mapping == NULL) - dev->dev_mapping = inode->i_mapping; - else if (dev->dev_mapping != inode->i_mapping) - retcode = -ENODEV; - } - mutex_unlock(&dev->struct_mutex); - } - - return retcode; -} -EXPORT_SYMBOL(drm_open); - -/** - * File \c open operation. - * - * \param inode device inode. - * \param filp file pointer. - * - * Puts the dev->fops corresponding to the device minor number into - * \p filp, call the \c open method, and restore the file operations. - */ -int drm_stub_open(struct inode *inode, struct file *filp) -{ - struct drm_device *dev = NULL; - struct drm_minor *minor; - int minor_id = iminor(inode); - int err = -ENODEV; - const struct file_operations *old_fops; - - DRM_DEBUG("\n"); - - mutex_lock(&drm_global_mutex); - minor = idr_find(&drm_minors_idr, minor_id); - if (!minor) - goto out; - - if (!(dev = minor->dev)) - goto out; - - if (drm_device_is_unplugged(dev)) - goto out; - - old_fops = filp->f_op; - filp->f_op = fops_get(dev->driver->fops); - if (filp->f_op == NULL) { - filp->f_op = old_fops; - goto out; - } - if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { - fops_put(filp->f_op); - filp->f_op = fops_get(old_fops); - } - fops_put(old_fops); - -out: - mutex_unlock(&drm_global_mutex); - return err; -} - -/** - * Check whether DRI will run on this CPU. - * - * \return non-zero if the DRI will run on this CPU, or zero otherwise. - */ -static int drm_cpu_valid(void) -{ -#if defined(__i386__) - if (boot_cpu_data.x86 == 3) - return 0; /* No cmpxchg on a 386 */ -#endif -#if defined(__sparc__) && !defined(__sparc_v9__) - return 0; /* No cmpxchg before v9 sparc. */ -#endif - return 1; -} - -/** - * Called whenever a process opens /dev/drm. - * - * \param inode device inode. - * \param filp file pointer. - * \param dev device. - * \return zero on success or a negative number on failure. - * - * Creates and initializes a drm_file structure for the file private data in \p - * filp and add it into the double linked list in \p dev. - */ -static int drm_open_helper(struct inode *inode, struct file *filp, - struct drm_device * dev) -{ - int minor_id = iminor(inode); - struct drm_file *priv; - int ret; - - if (filp->f_flags & O_EXCL) - return -EBUSY; /* No exclusive opens */ - if (!drm_cpu_valid()) - return -EINVAL; - if (dev->switch_power_state != DRM_SWITCH_POWER_ON) - return -EINVAL; - - DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - filp->private_data = priv; - priv->filp = filp; - priv->uid = current_euid(); - priv->pid = task_pid_nr(current); - priv->minor = idr_find(&drm_minors_idr, minor_id); - priv->ioctl_count = 0; - /* for compatibility root is always authenticated */ - priv->authenticated = capable(CAP_SYS_ADMIN); - priv->lock_count = 0; - - INIT_LIST_HEAD(&priv->lhead); - INIT_LIST_HEAD(&priv->fbs); - INIT_LIST_HEAD(&priv->event_list); - init_waitqueue_head(&priv->event_wait); - priv->event_space = 4096; /* set aside 4k for event buffer */ - - if (dev->driver->driver_features & DRIVER_GEM) - drm_gem_open(dev, priv); - - if (drm_core_check_feature(dev, DRIVER_PRIME)) - drm_prime_init_file_private(&priv->prime); - - if (dev->driver->open) { - ret = dev->driver->open(dev, priv); - if (ret < 0) - goto out_free; - } - - - /* if there is no current master make this fd it */ - mutex_lock(&dev->struct_mutex); - if (!priv->minor->master) { - /* create a new master */ - priv->minor->master = drm_master_create(priv->minor); - if (!priv->minor->master) { - mutex_unlock(&dev->struct_mutex); - ret = -ENOMEM; - goto out_free; - } - - priv->is_master = 1; - /* take another reference for the copy in the local file priv */ - priv->master = drm_master_get(priv->minor->master); - - priv->authenticated = 1; - - mutex_unlock(&dev->struct_mutex); - if (dev->driver->master_create) { - ret = dev->driver->master_create(dev, priv->master); - if (ret) { - mutex_lock(&dev->struct_mutex); - /* drop both references if this fails */ - drm_master_put(&priv->minor->master); - drm_master_put(&priv->master); - mutex_unlock(&dev->struct_mutex); - goto out_free; - } - } - mutex_lock(&dev->struct_mutex); - if (dev->driver->master_set) { - ret = dev->driver->master_set(dev, priv, true); - if (ret) { - /* drop both references if this fails */ - drm_master_put(&priv->minor->master); - drm_master_put(&priv->master); - mutex_unlock(&dev->struct_mutex); - goto out_free; - } - } - mutex_unlock(&dev->struct_mutex); - } else { - /* get a reference to the master */ - priv->master = drm_master_get(priv->minor->master); - mutex_unlock(&dev->struct_mutex); - } - - mutex_lock(&dev->struct_mutex); - list_add(&priv->lhead, &dev->filelist); - mutex_unlock(&dev->struct_mutex); - -#ifdef __alpha__ - /* - * Default the hose - */ - if (!dev->hose) { - struct pci_dev *pci_dev; - pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); - if (pci_dev) { - dev->hose = pci_dev->sysdata; - pci_dev_put(pci_dev); - } - if (!dev->hose) { - struct pci_bus *b = pci_bus_b(pci_root_buses.next); - if (b) - dev->hose = b->sysdata; - } - } -#endif - - return 0; - out_free: - kfree(priv); - filp->private_data = NULL; - return ret; -} - -/** No-op. */ -int drm_fasync(int fd, struct file *filp, int on) -{ - struct drm_file *priv = filp->private_data; - struct drm_device *dev = priv->minor->dev; - - DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, - (long)old_encode_dev(priv->minor->device)); - return fasync_helper(fd, filp, on, &dev->buf_async); -} -EXPORT_SYMBOL(drm_fasync); - -/* - * Reclaim locked buffers; note that this may be a bad idea if the current - * context doesn't have the hw lock... - */ -static void drm_reclaim_locked_buffers(struct drm_device *dev, struct file *f) -{ - struct drm_file *file_priv = f->private_data; - - if (drm_i_have_hw_lock(dev, file_priv)) { - dev->driver->reclaim_buffers_locked(dev, file_priv); - } else { - unsigned long _end = jiffies + 3 * DRM_HZ; - int locked = 0; - - drm_idlelock_take(&file_priv->master->lock); - - /* - * Wait for a while. - */ - do { - spin_lock_bh(&file_priv->master->lock.spinlock); - locked = file_priv->master->lock.idle_has_lock; - spin_unlock_bh(&file_priv->master->lock.spinlock); - if (locked) - break; - schedule(); - } while (!time_after_eq(jiffies, _end)); - - if (!locked) { - DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n" - "\tdriver to use reclaim_buffers_idlelocked() instead.\n" - "\tI will go on reclaiming the buffers anyway.\n"); - } - - dev->driver->reclaim_buffers_locked(dev, file_priv); - drm_idlelock_release(&file_priv->master->lock); - } -} - -static void drm_master_release(struct drm_device *dev, struct file *filp) -{ - struct drm_file *file_priv = filp->private_data; - - if (dev->driver->reclaim_buffers_locked && - file_priv->master->lock.hw_lock) - drm_reclaim_locked_buffers(dev, filp); - - if (dev->driver->reclaim_buffers_idlelocked && - file_priv->master->lock.hw_lock) { - drm_idlelock_take(&file_priv->master->lock); - dev->driver->reclaim_buffers_idlelocked(dev, file_priv); - drm_idlelock_release(&file_priv->master->lock); - } - - - if (drm_i_have_hw_lock(dev, file_priv)) { - DRM_DEBUG("File %p released, freeing lock for context %d\n", - filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); - drm_lock_free(&file_priv->master->lock, - _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); - } - - if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && - !dev->driver->reclaim_buffers_locked) { - dev->driver->reclaim_buffers(dev, file_priv); - } -} - -static void drm_events_release(struct drm_file *file_priv) -{ - struct drm_device *dev = file_priv->minor->dev; - struct drm_pending_event *e, *et; - struct drm_pending_vblank_event *v, *vt; - unsigned long flags; - - spin_lock_irqsave(&dev->event_lock, flags); - - /* Remove pending flips */ - list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) - if (v->base.file_priv == file_priv) { - list_del(&v->base.link); - drm_vblank_put(dev, v->pipe); - v->base.destroy(&v->base); - } - - /* Remove unconsumed events */ - list_for_each_entry_safe(e, et, &file_priv->event_list, link) - e->destroy(e); - - spin_unlock_irqrestore(&dev->event_lock, flags); -} - -/** - * Release file. - * - * \param inode device inode - * \param file_priv DRM file private. - * \return zero on success or a negative number on failure. - * - * If the hardware lock is held then free it, and take it again for the kernel - * context since it's necessary to reclaim buffers. Unlink the file private - * data from its list and free it. Decreases the open count and if it reaches - * zero calls drm_lastclose(). - */ -int drm_release(struct inode *inode, struct file *filp) -{ - struct drm_file *file_priv = filp->private_data; - struct drm_device *dev = file_priv->minor->dev; - int retcode = 0; - - mutex_lock(&drm_global_mutex); - - DRM_DEBUG("open_count = %d\n", dev->open_count); - - if (dev->driver->preclose) - dev->driver->preclose(dev, file_priv); - - /* ======================================================== - * Begin inline drm_release - */ - - DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", - task_pid_nr(current), - (long)old_encode_dev(file_priv->minor->device), - dev->open_count); - - /* Release any auth tokens that might point to this file_priv, - (do that under the drm_global_mutex) */ - if (file_priv->magic) - (void) drm_remove_magic(file_priv->master, file_priv->magic); - - /* if the master has gone away we can't do anything with the lock */ - if (file_priv->minor->master) - drm_master_release(dev, filp); - - drm_events_release(file_priv); - - if (dev->driver->driver_features & DRIVER_MODESET) - drm_fb_release(file_priv); - - if (dev->driver->driver_features & DRIVER_GEM) - drm_gem_release(dev, file_priv); - - mutex_lock(&dev->ctxlist_mutex); - if (!list_empty(&dev->ctxlist)) { - struct drm_ctx_list *pos, *n; - - list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { - if (pos->tag == file_priv && - pos->handle != DRM_KERNEL_CONTEXT) { - if (dev->driver->context_dtor) - dev->driver->context_dtor(dev, - pos->handle); - - drm_ctxbitmap_free(dev, pos->handle); - - list_del(&pos->head); - kfree(pos); - --dev->ctx_count; - } - } - } - mutex_unlock(&dev->ctxlist_mutex); - - mutex_lock(&dev->struct_mutex); - - if (file_priv->is_master) { - struct drm_master *master = file_priv->master; - struct drm_file *temp; - list_for_each_entry(temp, &dev->filelist, lhead) { - if ((temp->master == file_priv->master) && - (temp != file_priv)) - temp->authenticated = 0; - } - - /** - * Since the master is disappearing, so is the - * possibility to lock. - */ - - if (master->lock.hw_lock) { - if (dev->sigdata.lock == master->lock.hw_lock) - dev->sigdata.lock = NULL; - master->lock.hw_lock = NULL; - master->lock.file_priv = NULL; - wake_up_interruptible_all(&master->lock.lock_queue); - } - - if (file_priv->minor->master == file_priv->master) { - /* drop the reference held my the minor */ - if (dev->driver->master_drop) - dev->driver->master_drop(dev, file_priv, true); - drm_master_put(&file_priv->minor->master); - } - } - - /* drop the reference held my the file priv */ - drm_master_put(&file_priv->master); - file_priv->is_master = 0; - list_del(&file_priv->lhead); - mutex_unlock(&dev->struct_mutex); - - if (dev->driver->postclose) - dev->driver->postclose(dev, file_priv); - - if (drm_core_check_feature(dev, DRIVER_PRIME)) - drm_prime_destroy_file_private(&file_priv->prime); - - kfree(file_priv); - - /* ======================================================== - * End inline drm_release - */ - - atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); - if (!--dev->open_count) { - if (atomic_read(&dev->ioctl_count)) { - DRM_ERROR("Device busy: %d\n", - atomic_read(&dev->ioctl_count)); - retcode = -EBUSY; - } else - retcode = drm_lastclose(dev); - if (drm_device_is_unplugged(dev)) - drm_put_dev(dev); - } - mutex_unlock(&drm_global_mutex); - - return retcode; -} -EXPORT_SYMBOL(drm_release); - -static bool -drm_dequeue_event(struct drm_file *file_priv, - size_t total, size_t max, struct drm_pending_event **out) -{ - struct drm_device *dev = file_priv->minor->dev; - struct drm_pending_event *e; - unsigned long flags; - bool ret = false; - - spin_lock_irqsave(&dev->event_lock, flags); - - *out = NULL; - if (list_empty(&file_priv->event_list)) - goto out; - e = list_first_entry(&file_priv->event_list, - struct drm_pending_event, link); - if (e->event->length + total > max) - goto out; - - file_priv->event_space += e->event->length; - list_del(&e->link); - *out = e; - ret = true; - -out: - spin_unlock_irqrestore(&dev->event_lock, flags); - return ret; -} - -ssize_t drm_read(struct file *filp, char __user *buffer, - size_t count, loff_t *offset) -{ - struct drm_file *file_priv = filp->private_data; - struct drm_pending_event *e; - size_t total; - ssize_t ret; - - ret = wait_event_interruptible(file_priv->event_wait, - !list_empty(&file_priv->event_list)); - if (ret < 0) - return ret; - - total = 0; - while (drm_dequeue_event(file_priv, total, count, &e)) { - if (copy_to_user(buffer + total, - e->event, e->event->length)) { - total = -EFAULT; - break; - } - - total += e->event->length; - e->destroy(e); - } - - return total; -} -EXPORT_SYMBOL(drm_read); - -unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) -{ - struct drm_file *file_priv = filp->private_data; - unsigned int mask = 0; - - poll_wait(filp, &file_priv->event_wait, wait); - - if (!list_empty(&file_priv->event_list)) - mask |= POLLIN | POLLRDNORM; - - return mask; -} -EXPORT_SYMBOL(drm_poll); |