/**
- * \file drm_context.h
+ * \file drm_context.c
* IOCTLs for generic contexts
- *
+ *
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
* \param ctx_handle context handle.
*
* Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry
- * in drm_device::context_sareas, while holding the drm_device::struct_sem
+ * in drm_device::context_sareas, while holding the drm_device::struct_mutex
* lock.
*/
-void drm_ctxbitmap_free( drm_device_t *dev, int ctx_handle )
+void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle)
{
- if ( ctx_handle < 0 ) goto failed;
- if ( !dev->ctx_bitmap ) goto failed;
-
- if ( ctx_handle < DRM_MAX_CTXBITMAP ) {
- down(&dev->struct_sem);
- clear_bit( ctx_handle, dev->ctx_bitmap );
+ if (ctx_handle < 0)
+ goto failed;
+ if (!dev->ctx_bitmap)
+ goto failed;
+
+ if (ctx_handle < DRM_MAX_CTXBITMAP) {
+ mutex_lock(&dev->struct_mutex);
+ clear_bit(ctx_handle, dev->ctx_bitmap);
dev->context_sareas[ctx_handle] = NULL;
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return;
}
-failed:
- DRM_ERROR( "Attempt to free invalid context handle: %d\n",
- ctx_handle );
- return;
+ failed:
+ DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle);
+ return;
}
-/**
+/**
* Context bitmap allocation.
*
* \param dev DRM device.
*
* Find the first zero bit in drm_device::ctx_bitmap and (re)allocates
* drm_device::context_sareas to accommodate the new entry while holding the
- * drm_device::struct_sem lock.
+ * drm_device::struct_mutex lock.
*/
-int drm_ctxbitmap_next( drm_device_t *dev )
+static int drm_ctxbitmap_next(drm_device_t * dev)
{
int bit;
- if(!dev->ctx_bitmap) return -1;
-
- down(&dev->struct_sem);
- bit = find_first_zero_bit( dev->ctx_bitmap, DRM_MAX_CTXBITMAP );
- if ( bit < DRM_MAX_CTXBITMAP ) {
- set_bit( bit, dev->ctx_bitmap );
- DRM_DEBUG( "drm_ctxbitmap_next bit : %d\n", bit );
- if((bit+1) > dev->max_context) {
- dev->max_context = (bit+1);
- if(dev->context_sareas) {
+ if (!dev->ctx_bitmap)
+ return -1;
+
+ mutex_lock(&dev->struct_mutex);
+ bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
+ if (bit < DRM_MAX_CTXBITMAP) {
+ set_bit(bit, dev->ctx_bitmap);
+ DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit);
+ if ((bit + 1) > dev->max_context) {
+ dev->max_context = (bit + 1);
+ if (dev->context_sareas) {
drm_map_t **ctx_sareas;
ctx_sareas = drm_realloc(dev->context_sareas,
- (dev->max_context - 1) *
- sizeof(*dev->context_sareas),
- dev->max_context *
- sizeof(*dev->context_sareas),
- DRM_MEM_MAPS);
- if(!ctx_sareas) {
+ (dev->max_context -
+ 1) *
+ sizeof(*dev->
+ context_sareas),
+ dev->max_context *
+ sizeof(*dev->
+ context_sareas),
+ DRM_MEM_MAPS);
+ if (!ctx_sareas) {
clear_bit(bit, dev->ctx_bitmap);
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return -1;
}
dev->context_sareas = ctx_sareas;
dev->context_sareas[bit] = NULL;
} else {
/* max_context == 1 at this point */
- dev->context_sareas = drm_alloc(
- dev->max_context *
- sizeof(*dev->context_sareas),
- DRM_MEM_MAPS);
- if(!dev->context_sareas) {
+ dev->context_sareas =
+ drm_alloc(dev->max_context *
+ sizeof(*dev->context_sareas),
+ DRM_MEM_MAPS);
+ if (!dev->context_sareas) {
clear_bit(bit, dev->ctx_bitmap);
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return -1;
}
dev->context_sareas[bit] = NULL;
}
}
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return bit;
}
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return -1;
}
* \param dev DRM device.
*
* Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
+ * the drm_device::struct_mutex lock.
*/
-int drm_ctxbitmap_init( drm_device_t *dev )
+int drm_ctxbitmap_init(drm_device_t * dev)
{
int i;
- int temp;
+ int temp;
- down(&dev->struct_sem);
- dev->ctx_bitmap = (unsigned long *) drm_alloc( PAGE_SIZE,
- DRM_MEM_CTXBITMAP );
- if ( dev->ctx_bitmap == NULL ) {
- up(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
+ dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE,
+ DRM_MEM_CTXBITMAP);
+ if (dev->ctx_bitmap == NULL) {
+ mutex_unlock(&dev->struct_mutex);
return -ENOMEM;
}
- memset( (void *)dev->ctx_bitmap, 0, PAGE_SIZE );
+ memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE);
dev->context_sareas = NULL;
dev->max_context = -1;
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
- for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
- temp = drm_ctxbitmap_next( dev );
- DRM_DEBUG( "drm_ctxbitmap_init : %d\n", temp );
+ for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
+ temp = drm_ctxbitmap_next(dev);
+ DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp);
}
return 0;
* \param dev DRM device.
*
* Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
+ * the drm_device::struct_mutex lock.
*/
-void drm_ctxbitmap_cleanup( drm_device_t *dev )
+void drm_ctxbitmap_cleanup(drm_device_t * dev)
{
- down(&dev->struct_sem);
- if( dev->context_sareas ) drm_free( dev->context_sareas,
- sizeof(*dev->context_sareas) *
- dev->max_context,
- DRM_MEM_MAPS );
- drm_free( (void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP );
- up(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
+ if (dev->context_sareas)
+ drm_free(dev->context_sareas,
+ sizeof(*dev->context_sareas) *
+ dev->max_context, DRM_MEM_MAPS);
+ drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP);
+ mutex_unlock(&dev->struct_mutex);
}
/*@}*/
/**
* Get per-context SAREA.
- *
+ *
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* returns its handle.
*/
int drm_getsareactx(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+ unsigned int cmd, unsigned long arg)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->dev;
drm_ctx_priv_map_t __user *argp = (void __user *)arg;
drm_ctx_priv_map_t request;
drm_map_t *map;
+ drm_map_list_t *_entry;
if (copy_from_user(&request, argp, sizeof(request)))
return -EFAULT;
- down(&dev->struct_sem);
- if (dev->max_context < 0 || request.ctx_id >= (unsigned) dev->max_context) {
- up(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
+ if (dev->max_context < 0
+ || request.ctx_id >= (unsigned)dev->max_context) {
+ mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
map = dev->context_sareas[request.ctx_id];
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
+
+ request.handle = NULL;
+ list_for_each_entry(_entry, &dev->maplist->head, head) {
+ if (_entry->map == map) {
+ request.handle =
+ (void *)(unsigned long)_entry->user_token;
+ break;
+ }
+ }
+ if (request.handle == NULL)
+ return -EINVAL;
- request.handle = map->handle;
if (copy_to_user(argp, &request, sizeof(request)))
return -EFAULT;
return 0;
/**
* Set per-context SAREA.
- *
+ *
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* drm_device::context_sareas with it.
*/
int drm_setsareactx(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+ unsigned int cmd, unsigned long arg)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->dev;
drm_ctx_priv_map_t request;
drm_map_t *map = NULL;
drm_map_list_t *r_list = NULL;
struct list_head *list;
if (copy_from_user(&request,
- (drm_ctx_priv_map_t __user *)arg,
- sizeof(request)))
+ (drm_ctx_priv_map_t __user *) arg, sizeof(request)))
return -EFAULT;
- down(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
list_for_each(list, &dev->maplist->head) {
r_list = list_entry(list, drm_map_list_t, head);
- if(r_list->map &&
- r_list->map->handle == request.handle)
+ if (r_list->map
+ && r_list->user_token == (unsigned long)request.handle)
goto found;
}
-bad:
- up(&dev->struct_sem);
+ bad:
+ mutex_unlock(&dev->struct_mutex);
return -EINVAL;
-found:
+ found:
map = r_list->map;
- if (!map) goto bad;
+ if (!map)
+ goto bad;
if (dev->max_context < 0)
goto bad;
- if (request.ctx_id >= (unsigned) dev->max_context)
+ if (request.ctx_id >= (unsigned)dev->max_context)
goto bad;
dev->context_sareas[request.ctx_id] = map;
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
return 0;
}
*
* Attempt to set drm_device::context_flag.
*/
-int drm_context_switch( drm_device_t *dev, int old, int new )
+static int drm_context_switch(drm_device_t * dev, int old, int new)
{
- if ( test_and_set_bit( 0, &dev->context_flag ) ) {
- DRM_ERROR( "Reentering -- FIXME\n" );
- return -EBUSY;
- }
-
+ if (test_and_set_bit(0, &dev->context_flag)) {
+ DRM_ERROR("Reentering -- FIXME\n");
+ return -EBUSY;
+ }
- DRM_DEBUG( "Context switch from %d to %d\n", old, new );
+ DRM_DEBUG("Context switch from %d to %d\n", old, new);
- if ( new == dev->last_context ) {
- clear_bit( 0, &dev->context_flag );
- return 0;
- }
+ if (new == dev->last_context) {
+ clear_bit(0, &dev->context_flag);
+ return 0;
+ }
- return 0;
+ return 0;
}
/**
* hardware lock is held, clears the drm_device::context_flag and wakes up
* drm_device::context_wait.
*/
-int drm_context_switch_complete( drm_device_t *dev, int new )
+static int drm_context_switch_complete(drm_device_t * dev, int new)
{
- dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
- dev->last_switch = jiffies;
+ dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
+ dev->last_switch = jiffies;
- if ( !_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ) {
- DRM_ERROR( "Lock isn't held after context switch\n" );
- }
+ if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+ DRM_ERROR("Lock isn't held after context switch\n");
+ }
- /* If a context switch is ever initiated
- when the kernel holds the lock, release
- that lock here. */
- clear_bit( 0, &dev->context_flag );
- wake_up( &dev->context_wait );
+ /* If a context switch is ever initiated
+ when the kernel holds the lock, release
+ that lock here. */
+ clear_bit(0, &dev->context_flag);
+ wake_up(&dev->context_wait);
- return 0;
+ return 0;
}
/**
* \param arg user argument pointing to a drm_ctx_res structure.
* \return zero on success or a negative number on failure.
*/
-int drm_resctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_resctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_ctx_res_t res;
drm_ctx_t __user *argp = (void __user *)arg;
drm_ctx_t ctx;
int i;
- if ( copy_from_user( &res, argp, sizeof(res) ) )
+ if (copy_from_user(&res, argp, sizeof(res)))
return -EFAULT;
- if ( res.count >= DRM_RESERVED_CONTEXTS ) {
- memset( &ctx, 0, sizeof(ctx) );
- for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
+ if (res.count >= DRM_RESERVED_CONTEXTS) {
+ memset(&ctx, 0, sizeof(ctx));
+ for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
ctx.handle = i;
- if ( copy_to_user( &res.contexts[i],
- &i, sizeof(i) ) )
+ if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx)))
return -EFAULT;
}
}
res.count = DRM_RESERVED_CONTEXTS;
- if ( copy_to_user( argp, &res, sizeof(res) ) )
+ if (copy_to_user(argp, &res, sizeof(res)))
return -EFAULT;
return 0;
}
*
* Get a new handle for the context and copy to userspace.
*/
-int drm_addctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_addctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
- drm_ctx_list_t * ctx_entry;
+ drm_ctx_list_t *ctx_entry;
drm_ctx_t __user *argp = (void __user *)arg;
drm_ctx_t ctx;
- if ( copy_from_user( &ctx, argp, sizeof(ctx) ) )
+ if (copy_from_user(&ctx, argp, sizeof(ctx)))
return -EFAULT;
- ctx.handle = drm_ctxbitmap_next( dev );
- if ( ctx.handle == DRM_KERNEL_CONTEXT ) {
- /* Skip kernel's context and get a new one. */
- ctx.handle = drm_ctxbitmap_next( dev );
+ ctx.handle = drm_ctxbitmap_next(dev);
+ if (ctx.handle == DRM_KERNEL_CONTEXT) {
+ /* Skip kernel's context and get a new one. */
+ ctx.handle = drm_ctxbitmap_next(dev);
}
- DRM_DEBUG( "%d\n", ctx.handle );
- if ( ctx.handle == -1 ) {
- DRM_DEBUG( "Not enough free contexts.\n" );
- /* Should this return -EBUSY instead? */
+ DRM_DEBUG("%d\n", ctx.handle);
+ if (ctx.handle == -1) {
+ DRM_DEBUG("Not enough free contexts.\n");
+ /* Should this return -EBUSY instead? */
return -ENOMEM;
}
- if ( ctx.handle != DRM_KERNEL_CONTEXT )
- {
+ if (ctx.handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_ctor)
- dev->driver->context_ctor(dev, ctx.handle);
+ if (!dev->driver->context_ctor(dev, ctx.handle)) {
+ DRM_DEBUG("Running out of ctxs or memory.\n");
+ return -ENOMEM;
+ }
}
- ctx_entry = drm_alloc( sizeof(*ctx_entry), DRM_MEM_CTXLIST );
- if ( !ctx_entry ) {
+ ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST);
+ if (!ctx_entry) {
DRM_DEBUG("out of memory\n");
return -ENOMEM;
}
- INIT_LIST_HEAD( &ctx_entry->head );
+ INIT_LIST_HEAD(&ctx_entry->head);
ctx_entry->handle = ctx.handle;
ctx_entry->tag = priv;
- down( &dev->ctxlist_sem );
- list_add( &ctx_entry->head, &dev->ctxlist->head );
+ mutex_lock(&dev->ctxlist_mutex);
+ list_add(&ctx_entry->head, &dev->ctxlist->head);
++dev->ctx_count;
- up( &dev->ctxlist_sem );
+ mutex_unlock(&dev->ctxlist_mutex);
- if ( copy_to_user( argp, &ctx, sizeof(ctx) ) )
+ if (copy_to_user(argp, &ctx, sizeof(ctx)))
return -EFAULT;
return 0;
}
-int drm_modctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_modctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
/* This does nothing */
return 0;
* \param arg user argument pointing to a drm_ctx structure.
* \return zero on success or a negative number on failure.
*/
-int drm_getctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_getctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_ctx_t __user *argp = (void __user *)arg;
drm_ctx_t ctx;
- if ( copy_from_user( &ctx, argp, sizeof(ctx) ) )
+ if (copy_from_user(&ctx, argp, sizeof(ctx)))
return -EFAULT;
/* This is 0, because we don't handle any context flags */
ctx.flags = 0;
- if ( copy_to_user( argp, &ctx, sizeof(ctx) ) )
+ if (copy_to_user(argp, &ctx, sizeof(ctx)))
return -EFAULT;
return 0;
}
*
* Calls context_switch().
*/
-int drm_switchctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_switchctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_ctx_t ctx;
- if ( copy_from_user( &ctx, (drm_ctx_t __user *)arg, sizeof(ctx) ) )
+ if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
return -EFAULT;
- DRM_DEBUG( "%d\n", ctx.handle );
- return drm_context_switch( dev, dev->last_context, ctx.handle );
+ DRM_DEBUG("%d\n", ctx.handle);
+ return drm_context_switch(dev, dev->last_context, ctx.handle);
}
/**
*
* Calls context_switch_complete().
*/
-int drm_newctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_newctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_ctx_t ctx;
- if ( copy_from_user( &ctx, (drm_ctx_t __user *)arg, sizeof(ctx) ) )
+ if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
return -EFAULT;
- DRM_DEBUG( "%d\n", ctx.handle );
- drm_context_switch_complete( dev, ctx.handle );
+ DRM_DEBUG("%d\n", ctx.handle);
+ drm_context_switch_complete(dev, ctx.handle);
return 0;
}
*
* If not the special kernel context, calls ctxbitmap_free() to free the specified context.
*/
-int drm_rmctx( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_rmctx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_ctx_t ctx;
- if ( copy_from_user( &ctx, (drm_ctx_t __user *)arg, sizeof(ctx) ) )
+ if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
return -EFAULT;
- DRM_DEBUG( "%d\n", ctx.handle );
- if ( ctx.handle == DRM_KERNEL_CONTEXT + 1 ) {
+ DRM_DEBUG("%d\n", ctx.handle);
+ if (ctx.handle == DRM_KERNEL_CONTEXT + 1) {
priv->remove_auth_on_close = 1;
}
- if ( ctx.handle != DRM_KERNEL_CONTEXT ) {
+ if (ctx.handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_dtor)
dev->driver->context_dtor(dev, ctx.handle);
- drm_ctxbitmap_free( dev, ctx.handle );
+ drm_ctxbitmap_free(dev, ctx.handle);
}
- down( &dev->ctxlist_sem );
- if ( !list_empty( &dev->ctxlist->head ) ) {
+ mutex_lock(&dev->ctxlist_mutex);
+ if (!list_empty(&dev->ctxlist->head)) {
drm_ctx_list_t *pos, *n;
- list_for_each_entry_safe( pos, n, &dev->ctxlist->head, head ) {
- if ( pos->handle == ctx.handle ) {
- list_del( &pos->head );
- drm_free( pos, sizeof(*pos), DRM_MEM_CTXLIST );
+ list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) {
+ if (pos->handle == ctx.handle) {
+ list_del(&pos->head);
+ drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST);
--dev->ctx_count;
}
}
}
- up( &dev->ctxlist_sem );
+ mutex_unlock(&dev->ctxlist_mutex);
return 0;
}
/*@}*/
-
git://git.onelab.eu / linux-2.6.git / blobdiff