/**
* Allocate AGP memory.
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg pointer to a drm_agp_buffer structure.
* \return zero on success or a negative number on failure.
*
* 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)
{
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;
if (!(memory = drm_alloc_agp(dev, pages, type))) {
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -ENOMEM;
}
entry->handle = (unsigned long)memory->key + 1;
entry->memory = memory;
entry->bound = 0;
entry->pages = pages;
entry->prev = NULL;
entry->next = dev->agp->memory;
if (dev->agp->memory)
dev->agp->memory->prev = entry;
dev->agp->memory = entry;
request.handle = entry->handle;
request.physical = memory->physical;
if (copy_to_user(argp, &request, sizeof(request))) {
dev->agp->memory = entry->next;
dev->agp->memory->prev = NULL;
drm_free_agp(memory, pages);
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -EFAULT;
}
return 0;
}
/**
* Allocate AGP memory.
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg pointer to a drm_agp_buffer structure.
* \return zero on success or a negative number on failure.
*
* 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(drm_device_t *dev, drm_agp_buffer_t *request)
{
drm_agp_mem_t *entry;
DRM_AGP_MEM *memory;
unsigned long pages;
u32 type;
if (!dev->agp || !dev->agp->acquired)
return -EINVAL;
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;
if (!(memory = drm_alloc_agp(dev, pages, type))) {
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -ENOMEM;
}
entry->handle = (unsigned long)memory->key + 1;
entry->memory = memory;
entry->bound = 0;
entry->pages = pages;
entry->prev = NULL;
entry->next = dev->agp->memory;
if (dev->agp->memory)
dev->agp->memory->prev = entry;
dev->agp->memory = entry;
request->handle = entry->handle;
request->physical = memory->physical;
return 0;
}
