/**
- * \file drm_fops.h
+ * \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>
*/
#include "drmP.h"
+#include "drm_sarea.h"
#include <linux/poll.h>
-static int drm_setup( drm_device_t *dev )
+static int drm_open_helper(struct inode *inode, struct file *filp,
+ drm_device_t * dev);
+
+static int drm_setup(drm_device_t * dev)
{
+ drm_local_map_t *map;
int i;
int ret;
- if (dev->driver->presetup)
- {
- ret=dev->driver->presetup(dev);
- if (ret!=0)
+ 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 );
+ /* prebuild the SAREA */
+ i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM, _DRM_CONTAINS_LOCK, &map);
+ if (i != 0)
+ return i;
+
+ atomic_set(&dev->ioctl_count, 0);
+ atomic_set(&dev->vma_count, 0);
dev->buf_use = 0;
- atomic_set( &dev->buf_alloc, 0 );
+ atomic_set(&dev->buf_alloc, 0);
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- {
- i = drm_dma_setup( dev );
- if ( i < 0 )
+ if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
+ i = drm_dma_setup(dev);
+ if (i < 0)
return i;
}
- for ( i = 0 ; i < DRM_ARRAY_SIZE(dev->counts) ; i++ )
- atomic_set( &dev->counts[i], 0 );
+ for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
+ atomic_set(&dev->counts[i], 0);
- for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
+ for (i = 0; i < DRM_HASH_SIZE; i++) {
dev->magiclist[i].head = NULL;
dev->magiclist[i].tail = NULL;
}
- dev->maplist = drm_alloc(sizeof(*dev->maplist),
- DRM_MEM_MAPS);
- if(dev->maplist == NULL) return -ENOMEM;
- memset(dev->maplist, 0, sizeof(*dev->maplist));
- INIT_LIST_HEAD(&dev->maplist->head);
-
- dev->ctxlist = drm_alloc(sizeof(*dev->ctxlist),
- DRM_MEM_CTXLIST);
- if(dev->ctxlist == NULL) return -ENOMEM;
+ dev->ctxlist = drm_alloc(sizeof(*dev->ctxlist), DRM_MEM_CTXLIST);
+ if (dev->ctxlist == NULL)
+ return -ENOMEM;
memset(dev->ctxlist, 0, sizeof(*dev->ctxlist));
INIT_LIST_HEAD(&dev->ctxlist->head);
dev->vmalist = NULL;
dev->sigdata.lock = dev->lock.hw_lock = NULL;
- init_waitqueue_head( &dev->lock.lock_queue );
+ init_waitqueue_head(&dev->lock.lock_queue);
dev->queue_count = 0;
dev->queue_reserved = 0;
dev->queue_slots = 0;
dev->last_context = 0;
dev->last_switch = 0;
dev->last_checked = 0;
- init_waitqueue_head( &dev->context_wait );
+ init_waitqueue_head(&dev->context_wait);
dev->if_version = 0;
dev->ctx_start = 0;
dev->lck_start = 0;
- dev->buf_rp = dev->buf;
- dev->buf_wp = dev->buf;
- dev->buf_end = dev->buf + DRM_BSZ;
dev->buf_async = NULL;
- init_waitqueue_head( &dev->buf_readers );
- init_waitqueue_head( &dev->buf_writers );
+ init_waitqueue_head(&dev->buf_readers);
+ init_waitqueue_head(&dev->buf_writers);
- DRM_DEBUG( "\n" );
+ 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
+ * 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.
*/
- if (dev->driver->postsetup)
- dev->driver->postsetup(dev);
return 0;
}
/**
* Open file.
- *
+ *
* \param inode device inode
* \param filp file pointer.
* \return zero on success or a negative number on failure.
* 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 )
+int drm_open(struct inode *inode, struct file *filp)
{
drm_device_t *dev = NULL;
int minor = iminor(inode);
if (!((minor >= 0) && (minor < drm_cards_limit)))
return -ENODEV;
-
+
if (!drm_heads[minor])
return -ENODEV;
if (!(dev = drm_heads[minor]->dev))
return -ENODEV;
-
- retcode = drm_open_helper( inode, filp, dev );
- if ( !retcode ) {
- atomic_inc( &dev->counts[_DRM_STAT_OPENS] );
- spin_lock( &dev->count_lock );
- if ( !dev->open_count++ ) {
- spin_unlock( &dev->count_lock );
- return drm_setup( dev );
+
+ retcode = drm_open_helper(inode, filp, dev);
+ if (!retcode) {
+ atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
+ spin_lock(&dev->count_lock);
+ if (!dev->open_count++) {
+ spin_unlock(&dev->count_lock);
+ return drm_setup(dev);
}
- spin_unlock( &dev->count_lock );
+ spin_unlock(&dev->count_lock);
}
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)
+{
+ drm_device_t *dev = NULL;
+ int minor = iminor(inode);
+ int err = -ENODEV;
+ const struct file_operations *old_fops;
+
+ DRM_DEBUG("\n");
+
+ if (!((minor >= 0) && (minor < drm_cards_limit)))
+ return -ENODEV;
+
+ if (!drm_heads[minor])
+ return -ENODEV;
+
+ if (!(dev = drm_heads[minor]->dev))
+ return -ENODEV;
+
+ old_fops = filp->f_op;
+ filp->f_op = fops_get(&dev->driver->fops);
+ 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);
+
+ 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,
+ drm_device_t * dev)
+{
+ int minor = iminor(inode);
+ drm_file_t *priv;
+ int ret;
+
+ if (filp->f_flags & O_EXCL)
+ return -EBUSY; /* No exclusive opens */
+ if (!drm_cpu_valid())
+ return -EINVAL;
+
+ DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor);
+
+ priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
+ if (!priv)
+ return -ENOMEM;
+
+ memset(priv, 0, sizeof(*priv));
+ filp->private_data = priv;
+ priv->uid = current->euid;
+ priv->pid = current->pid;
+ priv->minor = minor;
+ priv->head = drm_heads[minor];
+ priv->ioctl_count = 0;
+ /* for compatibility root is always authenticated */
+ priv->authenticated = capable(CAP_SYS_ADMIN);
+ priv->lock_count = 0;
+
+ if (dev->driver->open) {
+ ret = dev->driver->open(dev, priv);
+ if (ret < 0)
+ goto out_free;
+ }
+
+ mutex_lock(&dev->struct_mutex);
+ if (!dev->file_last) {
+ priv->next = NULL;
+ priv->prev = NULL;
+ dev->file_first = priv;
+ dev->file_last = priv;
+ /* first opener automatically becomes master */
+ priv->master = 1;
+ } else {
+ priv->next = NULL;
+ priv->prev = dev->file_last;
+ dev->file_last->next = priv;
+ dev->file_last = priv;
+ }
+ 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:
+ drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
+ filp->private_data = NULL;
+ return ret;
+}
+
+/** No-op. */
+int drm_fasync(int fd, struct file *filp, int on)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->dev;
+ int retcode;
+
+ DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
+ (long)old_encode_dev(priv->head->device));
+ retcode = fasync_helper(fd, filp, on, &dev->buf_async);
+ if (retcode < 0)
+ return retcode;
+ return 0;
+}
+EXPORT_SYMBOL(drm_fasync);
+
/**
* Release file.
*
* 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 takedown().
+ * zero calls drm_lastclose().
*/
-int drm_release( struct inode *inode, struct file *filp )
+int drm_release(struct inode *inode, struct file *filp)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
lock_kernel();
dev = priv->head->dev;
- DRM_DEBUG( "open_count = %d\n", dev->open_count );
+ DRM_DEBUG("open_count = %d\n", dev->open_count);
- if (dev->driver->prerelease)
- dev->driver->prerelease(dev, filp);
+ if (dev->driver->preclose)
+ dev->driver->preclose(dev, filp);
/* ========================================================
* Begin inline drm_release
*/
- DRM_DEBUG( "pid = %d, device = 0x%lx, open_count = %d\n",
- current->pid, (long)old_encode_dev(priv->head->device), dev->open_count );
-
- if ( priv->lock_count && dev->lock.hw_lock &&
- _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) &&
- dev->lock.filp == filp ) {
- DRM_DEBUG( "File %p released, freeing lock for context %d\n",
- filp,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) );
-
- if (dev->driver->release)
- dev->driver->release(dev, filp);
-
- drm_lock_free( dev, &dev->lock.hw_lock->lock,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) );
-
- /* FIXME: may require heavy-handed reset of
- hardware at this point, possibly
- processed via a callback to the X
- server. */
- }
- else if ( dev->driver->release && priv->lock_count && dev->lock.hw_lock ) {
+ DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
+ current->pid, (long)old_encode_dev(priv->head->device),
+ dev->open_count);
+
+ if (priv->lock_count && dev->lock.hw_lock &&
+ _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) &&
+ dev->lock.filp == filp) {
+ DRM_DEBUG("File %p released, freeing lock for context %d\n",
+ filp, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+
+ if (dev->driver->reclaim_buffers_locked)
+ dev->driver->reclaim_buffers_locked(dev, filp);
+
+ drm_lock_free(dev, &dev->lock.hw_lock->lock,
+ _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+
+ /* FIXME: may require heavy-handed reset of
+ hardware at this point, possibly
+ processed via a callback to the X
+ server. */
+ } else if (dev->driver->reclaim_buffers_locked && priv->lock_count
+ && dev->lock.hw_lock) {
/* The lock is required to reclaim buffers */
- DECLARE_WAITQUEUE( entry, current );
+ DECLARE_WAITQUEUE(entry, current);
- add_wait_queue( &dev->lock.lock_queue, &entry );
+ add_wait_queue(&dev->lock.lock_queue, &entry);
for (;;) {
__set_current_state(TASK_INTERRUPTIBLE);
- if ( !dev->lock.hw_lock ) {
+ if (!dev->lock.hw_lock) {
/* Device has been unregistered */
retcode = -EINTR;
break;
}
- if ( drm_lock_take( &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT ) ) {
- dev->lock.filp = filp;
+ if (drm_lock_take(&dev->lock.hw_lock->lock,
+ DRM_KERNEL_CONTEXT)) {
+ dev->lock.filp = filp;
dev->lock.lock_time = jiffies;
- atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
+ atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
break; /* Got lock */
}
- /* Contention */
+ /* Contention */
schedule();
- if ( signal_pending( current ) ) {
+ if (signal_pending(current)) {
retcode = -ERESTARTSYS;
break;
}
}
__set_current_state(TASK_RUNNING);
- remove_wait_queue( &dev->lock.lock_queue, &entry );
- if( !retcode ) {
- if (dev->driver->release)
- dev->driver->release(dev, filp);
- drm_lock_free( dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT );
+ remove_wait_queue(&dev->lock.lock_queue, &entry);
+ if (!retcode) {
+ dev->driver->reclaim_buffers_locked(dev, filp);
+ drm_lock_free(dev, &dev->lock.hw_lock->lock,
+ DRM_KERNEL_CONTEXT);
}
}
-
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- {
+
+ if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
+ !dev->driver->reclaim_buffers_locked) {
dev->driver->reclaim_buffers(dev, filp);
}
- drm_fasync( -1, filp, 0 );
+ drm_fasync(-1, filp, 0);
- down( &dev->ctxlist_sem );
- if ( !list_empty( &dev->ctxlist->head ) ) {
+ mutex_lock(&dev->ctxlist_mutex);
+ if (dev->ctxlist && (!list_empty(&dev->ctxlist->head))) {
drm_ctx_list_t *pos, *n;
- list_for_each_entry_safe( pos, n, &dev->ctxlist->head, head ) {
- if ( pos->tag == priv &&
- pos->handle != DRM_KERNEL_CONTEXT ) {
+ list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) {
+ if (pos->tag == priv &&
+ pos->handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_dtor)
- dev->driver->context_dtor(dev, pos->handle);
+ dev->driver->context_dtor(dev,
+ pos->handle);
- drm_ctxbitmap_free( dev, pos->handle );
+ drm_ctxbitmap_free(dev, pos->handle);
- list_del( &pos->head );
- drm_free( pos, sizeof(*pos), DRM_MEM_CTXLIST );
+ list_del(&pos->head);
+ drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST);
--dev->ctx_count;
}
}
}
- up( &dev->ctxlist_sem );
+ mutex_unlock(&dev->ctxlist_mutex);
- down( &dev->struct_sem );
- if ( priv->remove_auth_on_close == 1 ) {
+ mutex_lock(&dev->struct_mutex);
+ if (priv->remove_auth_on_close == 1) {
drm_file_t *temp = dev->file_first;
- while ( temp ) {
+ while (temp) {
temp->authenticated = 0;
temp = temp->next;
}
}
- if ( priv->prev ) {
+ if (priv->prev) {
priv->prev->next = priv->next;
} else {
- dev->file_first = priv->next;
+ dev->file_first = priv->next;
}
- if ( priv->next ) {
+ if (priv->next) {
priv->next->prev = priv->prev;
} else {
- dev->file_last = priv->prev;
+ dev->file_last = priv->prev;
}
- up( &dev->struct_sem );
-
- if (dev->driver->free_filp_priv)
- dev->driver->free_filp_priv(dev, priv);
+ mutex_unlock(&dev->struct_mutex);
- drm_free( priv, sizeof(*priv), DRM_MEM_FILES );
+ if (dev->driver->postclose)
+ dev->driver->postclose(dev, priv);
+ drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
/* ========================================================
* End inline drm_release
*/
- atomic_inc( &dev->counts[_DRM_STAT_CLOSES] );
- spin_lock( &dev->count_lock );
- if ( !--dev->open_count ) {
- if ( atomic_read( &dev->ioctl_count ) || dev->blocked ) {
- DRM_ERROR( "Device busy: %d %d\n",
- atomic_read( &dev->ioctl_count ),
- dev->blocked );
- spin_unlock( &dev->count_lock );
+ atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
+ spin_lock(&dev->count_lock);
+ if (!--dev->open_count) {
+ if (atomic_read(&dev->ioctl_count) || dev->blocked) {
+ DRM_ERROR("Device busy: %d %d\n",
+ atomic_read(&dev->ioctl_count), dev->blocked);
+ spin_unlock(&dev->count_lock);
unlock_kernel();
return -EBUSY;
}
- spin_unlock( &dev->count_lock );
+ spin_unlock(&dev->count_lock);
unlock_kernel();
- return drm_takedown( dev );
+ return drm_lastclose(dev);
}
- spin_unlock( &dev->count_lock );
+ spin_unlock(&dev->count_lock);
unlock_kernel();
}
EXPORT_SYMBOL(drm_release);
-/**
- * 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.
- */
-int drm_open_helper(struct inode *inode, struct file *filp, drm_device_t *dev)
-{
- int minor = iminor(inode);
- drm_file_t *priv;
- int ret;
-
- if (filp->f_flags & O_EXCL) return -EBUSY; /* No exclusive opens */
- if (!drm_cpu_valid()) return -EINVAL;
-
- DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor);
-
- priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
- if(!priv) return -ENOMEM;
-
- memset(priv, 0, sizeof(*priv));
- filp->private_data = priv;
- priv->uid = current->euid;
- priv->pid = current->pid;
- priv->minor = minor;
- priv->head = drm_heads[minor];
- priv->ioctl_count = 0;
- priv->authenticated = capable(CAP_SYS_ADMIN);
- priv->lock_count = 0;
-
- if (dev->driver->open_helper) {
- ret=dev->driver->open_helper(dev, priv);
- if (ret < 0)
- goto out_free;
- }
-
- down(&dev->struct_sem);
- if (!dev->file_last) {
- priv->next = NULL;
- priv->prev = NULL;
- dev->file_first = priv;
- dev->file_last = priv;
- } else {
- priv->next = NULL;
- priv->prev = dev->file_last;
- dev->file_last->next = priv;
- dev->file_last = priv;
- }
- up(&dev->struct_sem);
-
-#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:
- drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
- filp->private_data=NULL;
- return ret;
-}
-
-/** No-op. */
-int drm_flush(struct file *filp)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
-
- DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
- current->pid, (long)old_encode_dev(priv->head->device), dev->open_count);
- return 0;
-}
-EXPORT_SYMBOL(drm_flush);
-
-/** No-op. */
-int drm_fasync(int fd, struct file *filp, int on)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
- int retcode;
-
- DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, (long)old_encode_dev(priv->head->device));
- retcode = fasync_helper(fd, filp, on, &dev->buf_async);
- if (retcode < 0) return retcode;
- return 0;
-}
-EXPORT_SYMBOL(drm_fasync);
-
/** No-op. */
unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
{
return 0;
}
EXPORT_SYMBOL(drm_poll);
-
-
-/** No-op. */
-ssize_t drm_read(struct file *filp, char __user *buf, size_t count, loff_t *off)
-{
- return 0;
-}
git://git.onelab.eu / linux-2.6.git / blobdiff