drm: add in-kernel entry points for rest of AGP ioctls

Allow DRM modules to call AGP internally in the kernel.

From: Ian Romanick <idr@us.ibm.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 81 insertions, 42 deletions

diff --git a/drivers/char/drm/drm_agpsupport.c b/drivers/char/drm/drm_agpsupport.c
index 2b6453a9ffce..b80e61a4c40b 100644
--- a/drivers/char/drm/drm_agpsupport.c
+++ b/drivers/char/drm/drm_agpsupport.c
@@ -208,30 +208,22 @@ int drm_agp_enable_ioctl(struct inode *inode, struct file *filp,
  * Verifies the AGP device is present and has been acquired, allocates the
  * memory via alloc_agp() and creates a drm_agp_mem entry for it.
  */
-int drm_agp_alloc(struct inode *inode, struct file *filp,
-                  unsigned int cmd, unsigned long arg)
+int drm_agp_alloc(drm_device_t *dev, drm_agp_buffer_t *request)
 {
-        drm_file_t *priv = filp->private_data;
-        drm_device_t *dev = priv->head->dev;
-        drm_agp_buffer_t request;
         drm_agp_mem_t *entry;
         DRM_AGP_MEM *memory;
         unsigned long pages;
         u32 type;
-        drm_agp_buffer_t __user *argp = (void __user *)arg;
 
         if (!dev->agp || !dev->agp->acquired)
                 return -EINVAL;
-        if (copy_from_user(&request, argp, sizeof(request)))
-                return -EFAULT;
         if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
                 return -ENOMEM;
 
         memset(entry, 0, sizeof(*entry));
 
-        pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
-        type = (u32) request.type;
-
+        pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
+        type = (u32) request->type;
         if (!(memory = drm_alloc_agp(dev, pages, type))) {
                 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
                 return -ENOMEM;
@@ -247,16 +239,39 @@ int drm_agp_alloc(struct inode *inode, struct file *filp,
                 dev->agp->memory->prev = entry;
         dev->agp->memory = entry;
 
-        request.handle = entry->handle;
-        request.physical = memory->physical;
+        request->handle = entry->handle;
+        request->physical = memory->physical;
+
+        return 0;
+}
+EXPORT_SYMBOL(drm_agp_alloc);
+
+int drm_agp_alloc_ioctl(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_agp_buffer_t request;
+        drm_agp_buffer_t __user *argp = (void __user *)arg;
+        int err;
+
+        if (copy_from_user(&request, argp, sizeof(request)))
+                return -EFAULT;
+
+        err = drm_agp_alloc(dev, &request);
+        if (err)
+                return err;
 
         if (copy_to_user(argp, &request, sizeof(request))) {
+                drm_agp_mem_t *entry = dev->agp->memory;
+
                 dev->agp->memory = entry->next;
                 dev->agp->memory->prev = NULL;
-                drm_free_agp(memory, pages);
+                drm_free_agp(entry->memory, entry->pages);
                 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
                 return -EFAULT;
         }
+
         return 0;
 }
 
@@ -293,21 +308,14 @@ static drm_agp_mem_t *drm_agp_lookup_entry(drm_device_t * dev,
  * Verifies the AGP device is present and acquired, looks-up the AGP memory
  * entry and passes it to the unbind_agp() function.
  */
-int drm_agp_unbind(struct inode *inode, struct file *filp,
-                   unsigned int cmd, unsigned long arg)
+int drm_agp_unbind(drm_device_t *dev, drm_agp_binding_t *request)
 {
-        drm_file_t *priv = filp->private_data;
-        drm_device_t *dev = priv->head->dev;
-        drm_agp_binding_t request;
         drm_agp_mem_t *entry;
         int ret;
 
         if (!dev->agp || !dev->agp->acquired)
                 return -EINVAL;
-        if (copy_from_user
-            (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
-                return -EFAULT;
-        if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
+        if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
                 return -EINVAL;
         if (!entry->bound)
                 return -EINVAL;
@@ -316,6 +324,21 @@ int drm_agp_unbind(struct inode *inode, struct file *filp,
                 entry->bound = 0;
         return ret;
 }
+EXPORT_SYMBOL(drm_agp_unbind);
+
+int drm_agp_unbind_ioctl(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_agp_binding_t request;
+
+        if (copy_from_user
+            (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
+                return -EFAULT;
+
+        return drm_agp_unbind(dev, &request);
+}
 
 /**
  * Bind AGP memory into the GATT (ioctl)
@@ -330,26 +353,19 @@ int drm_agp_unbind(struct inode *inode, struct file *filp,
  * is currently bound into the GATT. Looks-up the AGP memory entry and passes
  * it to bind_agp() function.
  */
-int drm_agp_bind(struct inode *inode, struct file *filp,
-                 unsigned int cmd, unsigned long arg)
+int drm_agp_bind(drm_device_t *dev, drm_agp_binding_t *request)
 {
-        drm_file_t *priv = filp->private_data;
-        drm_device_t *dev = priv->head->dev;
-        drm_agp_binding_t request;
         drm_agp_mem_t *entry;
         int retcode;
         int page;
 
         if (!dev->agp || !dev->agp->acquired)
                 return -EINVAL;
-        if (copy_from_user
-            (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
-                return -EFAULT;
-        if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
+        if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
                 return -EINVAL;
         if (entry->bound)
                 return -EINVAL;
-        page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
+        page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
         if ((retcode = drm_bind_agp(entry->memory, page)))
                 return retcode;
         entry->bound = dev->agp->base + (page << PAGE_SHIFT);
@@ -357,6 +373,21 @@ int drm_agp_bind(struct inode *inode, struct file *filp,
                   dev->agp->base, entry->bound);
         return 0;
 }
+EXPORT_SYMBOL(drm_agp_bind);
+
+int drm_agp_bind_ioctl(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_agp_binding_t request;
+
+        if (copy_from_user
+            (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
+                return -EFAULT;
+
+        return drm_agp_bind(dev, &request);
+}
 
 /**
  * Free AGP memory (ioctl).
@@ -372,20 +403,13 @@ int drm_agp_bind(struct inode *inode, struct file *filp,
  * unbind_agp(). Frees it via free_agp() as well as the entry itself
  * and unlinks from the doubly linked list it's inserted in.
  */
-int drm_agp_free(struct inode *inode, struct file *filp,
-                 unsigned int cmd, unsigned long arg)
+int drm_agp_free(drm_device_t *dev, drm_agp_buffer_t *request)
 {
-        drm_file_t *priv = filp->private_data;
-        drm_device_t *dev = priv->head->dev;
-        drm_agp_buffer_t request;
         drm_agp_mem_t *entry;
 
         if (!dev->agp || !dev->agp->acquired)
                 return -EINVAL;
-        if (copy_from_user
-            (&request, (drm_agp_buffer_t __user *) arg, sizeof(request)))
-                return -EFAULT;
-        if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
+        if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
                 return -EINVAL;
         if (entry->bound)
                 drm_unbind_agp(entry->memory);
@@ -402,6 +426,21 @@ int drm_agp_free(struct inode *inode, struct file *filp,
         drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
         return 0;
 }
+EXPORT_SYMBOL(drm_agp_free);
+
+int drm_agp_free_ioctl(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_agp_buffer_t request;
+
+        if (copy_from_user
+            (&request, (drm_agp_buffer_t __user *) arg, sizeof(request)))
+                return -EFAULT;
+
+        return drm_agp_free(dev, &request);
+}
 
 /**
  * Initialize the AGP resources.