#include <linux/vmalloc.h>
#include "drmP.h"
-/**
- * Compute size order. Returns the exponent of the smaller power of two which
- * is greater or equal to given number.
- *
- * \param size size.
- * \return order.
- *
- * \todo Can be made faster.
- */
-int drm_order( unsigned long size )
+unsigned long drm_get_resource_start(drm_device_t *dev, unsigned int resource)
{
- int order;
- unsigned long tmp;
+ return pci_resource_start(dev->pdev, resource);
+}
+EXPORT_SYMBOL(drm_get_resource_start);
- for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++)
- ;
+unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource)
+{
+ return pci_resource_len(dev->pdev, resource);
+}
+EXPORT_SYMBOL(drm_get_resource_len);
- if (size & (size - 1))
- ++order;
+static drm_local_map_t *drm_find_matching_map(drm_device_t *dev,
+ drm_local_map_t *map)
+{
+ struct list_head *list;
- return order;
+ list_for_each(list, &dev->maplist->head) {
+ drm_map_list_t *entry = list_entry(list, drm_map_list_t, head);
+ if (entry->map && map->type == entry->map->type &&
+ entry->map->offset == map->offset) {
+ return entry->map;
+ }
+ }
+
+ return NULL;
}
-EXPORT_SYMBOL(drm_order);
-#ifdef CONFIG_COMPAT
/*
- * Used to allocate 32-bit handles for _DRM_SHM regions
- * The 0x10000000 value is chosen to be out of the way of
- * FB/register and GART physical addresses.
+ * Used to allocate 32-bit handles for mappings.
*/
-static unsigned int map32_handle = 0x10000000;
+#define START_RANGE 0x10000000
+#define END_RANGE 0x40000000
+
+#ifdef _LP64
+static __inline__ unsigned int HandleID(unsigned long lhandle, drm_device_t *dev)
+{
+ static unsigned int map32_handle = START_RANGE;
+ unsigned int hash;
+
+ if (lhandle & 0xffffffff00000000) {
+ hash = map32_handle;
+ map32_handle += PAGE_SIZE;
+ if (map32_handle > END_RANGE)
+ map32_handle = START_RANGE;
+ } else
+ hash = lhandle;
+
+ while (1) {
+ drm_map_list_t *_entry;
+ list_for_each_entry(_entry, &dev->maplist->head,head) {
+ if (_entry->user_token == hash)
+ break;
+ }
+ if (&_entry->head == &dev->maplist->head)
+ return hash;
+
+ hash += PAGE_SIZE;
+ map32_handle += PAGE_SIZE;
+ }
+}
+#else
+# define HandleID(x,dev) (unsigned int)(x)
#endif
/**
* type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
* applicable and if supported by the kernel.
*/
-int drm_addmap( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_addmap(drm_device_t * dev, unsigned int offset,
+ unsigned int size, drm_map_type_t type,
+ drm_map_flags_t flags, drm_local_map_t ** map_ptr)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_map_t *map;
- drm_map_t __user *argp = (void __user *)arg;
drm_map_list_t *list;
-
- if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */
+ drm_dma_handle_t *dmah;
+ drm_local_map_t *found_map;
map = drm_alloc( sizeof(*map), DRM_MEM_MAPS );
if ( !map )
return -ENOMEM;
- if ( copy_from_user( map, argp, sizeof(*map) ) ) {
- drm_free( map, sizeof(*map), DRM_MEM_MAPS );
- return -EFAULT;
- }
+ map->offset = offset;
+ map->size = size;
+ map->flags = flags;
+ map->type = type;
/* Only allow shared memory to be removable since we only keep enough
* book keeping information about shared memory to allow for removal
#ifdef __alpha__
map->offset += dev->hose->mem_space->start;
#endif
+ /* Some drivers preinitialize some maps, without the X Server
+ * needing to be aware of it. Therefore, we just return success
+ * when the server tries to create a duplicate map.
+ */
+ found_map = drm_find_matching_map(dev, map);
+ if (found_map != NULL) {
+ if (found_map->size != map->size) {
+ DRM_DEBUG("Matching maps of type %d with "
+ "mismatched sizes, (%ld vs %ld)\n",
+ map->type, map->size, found_map->size);
+ found_map->size = map->size;
+ }
+
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ *map_ptr = found_map;
+ return 0;
+ }
+
if (drm_core_has_MTRR(dev)) {
if ( map->type == _DRM_FRAME_BUFFER ||
(map->flags & _DRM_WRITE_COMBINING) ) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
- map->offset += dev->sg->handle;
+ map->offset += (unsigned long)dev->sg->virtual;
break;
case _DRM_CONSISTENT:
- {
/* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
- * As we're limit the address to 2^32-1 (or lses),
+ * As we're limiting the address to 2^32-1 (or less),
* casting it down to 32 bits is no problem, but we
* need to point to a 64bit variable first. */
- dma_addr_t bus_addr;
- map->handle = drm_pci_alloc(dev, map->size, map->size,
- 0xffffffffUL, &bus_addr);
- map->offset = (unsigned long)bus_addr;
- if (!map->handle) {
+ dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL);
+ if (!dmah) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -ENOMEM;
}
+ map->handle = dmah->vaddr;
+ map->offset = (unsigned long)dmah->busaddr;
+ kfree(dmah);
break;
- }
default:
drm_free( map, sizeof(*map), DRM_MEM_MAPS );
return -EINVAL;
down(&dev->struct_sem);
list_add(&list->head, &dev->maplist->head);
-#ifdef CONFIG_COMPAT
- /* Assign a 32-bit handle for _DRM_SHM mappings */
+ /* Assign a 32-bit handle */
/* We do it here so that dev->struct_sem protects the increment */
- if (map->type == _DRM_SHM)
- map->offset = map32_handle += PAGE_SIZE;
-#endif
+ list->user_token = HandleID(map->type==_DRM_SHM
+ ? (unsigned long)map->handle
+ : map->offset, dev);
up(&dev->struct_sem);
- if ( copy_to_user( argp, map, sizeof(*map) ) )
+ *map_ptr = map;
+ return 0;
+}
+EXPORT_SYMBOL(drm_addmap);
+
+int drm_addmap_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_map_t map;
+ drm_map_t *map_ptr;
+ drm_map_t __user *argp = (void __user *)arg;
+ int err;
+ unsigned long handle = 0;
+
+ if (!(filp->f_mode & 3))
+ return -EACCES; /* Require read/write */
+
+ if (copy_from_user(& map, argp, sizeof(map))) {
return -EFAULT;
- if (copy_to_user(&argp->handle, &map->offset, sizeof(map->offset)))
+ }
+
+ err = drm_addmap(dev, map.offset, map.size, map.type, map.flags,
+ &map_ptr);
+
+ if (err) {
+ return err;
+ }
+
+ {
+ drm_map_list_t *_entry;
+ list_for_each_entry(_entry, &dev->maplist->head, head) {
+ if (_entry->map == map_ptr)
+ handle = _entry->user_token;
+ }
+ if (!handle)
+ return -EFAULT;
+ }
+
+ if (copy_to_user(argp, map_ptr, sizeof(*map_ptr)))
+ return -EFAULT;
+ if (put_user(handle, &argp->handle))
return -EFAULT;
return 0;
-}
+ }
/**
* its being used, and free any associate resource (such as MTRR's) if it's not
* being on use.
*
- * \sa addmap().
+ * \sa drm_addmap
*/
-int drm_rmmap(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
struct list_head *list;
drm_map_list_t *r_list = NULL;
- drm_vma_entry_t *pt, *prev;
- drm_map_t *map;
+ drm_dma_handle_t dmah;
+
+ /* Find the list entry for the map and remove it */
+ list_for_each(list, &dev->maplist->head) {
+ r_list = list_entry(list, drm_map_list_t, head);
+
+ if (r_list->map == map) {
+ list_del(list);
+ drm_free(list, sizeof(*list), DRM_MEM_MAPS);
+ break;
+ }
+ }
+
+ /* List has wrapped around to the head pointer, or it's empty and we
+ * didn't find anything.
+ */
+ if (list == (&dev->maplist->head)) {
+ return -EINVAL;
+ }
+
+ switch (map->type) {
+ case _DRM_REGISTERS:
+ drm_ioremapfree(map->handle, map->size, dev);
+ /* FALLTHROUGH */
+ case _DRM_FRAME_BUFFER:
+ if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
+ int retcode;
+ retcode = mtrr_del(map->mtrr, map->offset,
+ map->size);
+ DRM_DEBUG ("mtrr_del=%d\n", retcode);
+ }
+ break;
+ case _DRM_SHM:
+ vfree(map->handle);
+ break;
+ case _DRM_AGP:
+ case _DRM_SCATTER_GATHER:
+ break;
+ case _DRM_CONSISTENT:
+ dmah.vaddr = map->handle;
+ dmah.busaddr = map->offset;
+ dmah.size = map->size;
+ __drm_pci_free(dev, &dmah);
+ break;
+ }
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_rmmap_locked);
+
+int drm_rmmap(drm_device_t *dev, drm_local_map_t *map)
+{
+ int ret;
+
+ down(&dev->struct_sem);
+ ret = drm_rmmap_locked(dev, map);
+ up(&dev->struct_sem);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_rmmap);
+
+/* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
+ * the last close of the device, and this is necessary for cleanup when things
+ * exit uncleanly. Therefore, having userland manually remove mappings seems
+ * like a pointless exercise since they're going away anyway.
+ *
+ * One use case might be after addmap is allowed for normal users for SHM and
+ * gets used by drivers that the server doesn't need to care about. This seems
+ * unlikely.
+ */
+int drm_rmmap_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_map_t request;
- int found_maps = 0;
+ drm_local_map_t *map = NULL;
+ struct list_head *list;
+ int ret;
- if (copy_from_user(&request, (drm_map_t __user *)arg,
- sizeof(request))) {
+ if (copy_from_user(&request, (drm_map_t __user *)arg, sizeof(request))) {
return -EFAULT;
}
down(&dev->struct_sem);
- list = &dev->maplist->head;
list_for_each(list, &dev->maplist->head) {
- r_list = list_entry(list, drm_map_list_t, head);
+ drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
- if(r_list->map &&
- r_list->map->offset == (unsigned long) request.handle &&
- r_list->map->flags & _DRM_REMOVABLE) break;
+ if (r_list->map &&
+ r_list->user_token == (unsigned long) request.handle &&
+ r_list->map->flags & _DRM_REMOVABLE) {
+ map = r_list->map;
+ break;
+ }
}
/* List has wrapped around to the head pointer, or its empty we didn't
* find anything.
*/
- if(list == (&dev->maplist->head)) {
+ if (list == (&dev->maplist->head)) {
up(&dev->struct_sem);
return -EINVAL;
}
- map = r_list->map;
- list_del(list);
- drm_free(list, sizeof(*list), DRM_MEM_MAPS);
- for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
- if (pt->vma->vm_private_data == map) found_maps++;
- }
+ if (!map)
+ return -EINVAL;
- if(!found_maps) {
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- if (drm_core_has_MTRR(dev)) {
- if (map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr,
- map->offset,
- map->size);
- DRM_DEBUG("mtrr_del = %d\n", retcode);
- }
- }
- drm_ioremapfree(map->handle, map->size, dev);
- break;
- case _DRM_SHM:
- vfree(map->handle);
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- case _DRM_CONSISTENT:
- drm_pci_free(dev, map->size, map->handle, map->offset);
- break;
- }
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ /* Register and framebuffer maps are permanent */
+ if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
+ up(&dev->struct_sem);
+ return 0;
}
+
+ ret = drm_rmmap_locked(dev, map);
+
up(&dev->struct_sem);
- return 0;
+
+ return ret;
}
/**
* Cleanup after an error on one of the addbufs() functions.
*
+ * \param dev DRM device.
* \param entry buffer entry where the error occurred.
*
* Frees any pages and buffers associated with the given entry.
* reallocates the buffer list of the same size order to accommodate the new
* buffers.
*/
-static int drm_addbufs_agp(drm_device_t *dev, drm_buf_desc_t *request)
+int drm_addbufs_agp(drm_device_t *dev, drm_buf_desc_t *request)
{
drm_device_dma_t *dma = dev->dma;
drm_buf_entry_t *entry;
atomic_dec( &dev->buf_alloc );
return 0;
}
+EXPORT_SYMBOL(drm_addbufs_agp);
#endif /* __OS_HAS_AGP */
-static int drm_addbufs_pci(drm_device_t *dev, drm_buf_desc_t *request)
+int drm_addbufs_pci(drm_device_t *dev, drm_buf_desc_t *request)
{
drm_device_dma_t *dma = dev->dma;
int count;
return 0;
}
+EXPORT_SYMBOL(drm_addbufs_pci);
static int drm_addbufs_sg(drm_device_t *dev, drm_buf_desc_t *request)
{
buf->offset = (dma->byte_count + offset);
buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset + dev->sg->handle);
+ buf->address = (void *)(agp_offset + offset
+ + (unsigned long)dev->sg->virtual);
buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
|| (drm_core_check_feature(dev, DRIVER_FB_DMA)
&& (dma->flags & _DRM_DMA_USE_FB))) {
drm_map_t *map = dev->agp_buffer_map;
+ unsigned long token = dev->agp_buffer_token;
if ( !map ) {
retcode = -EINVAL;
virtual = do_mmap( filp, 0, map->size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
- (unsigned long)map->offset );
+ token );
#if LINUX_VERSION_CODE <= 0x020402
up( ¤t->mm->mmap_sem );
#else
return retcode;
}
+/**
+ * Compute size order. Returns the exponent of the smaller power of two which
+ * is greater or equal to given number.
+ *
+ * \param size size.
+ * \return order.
+ *
+ * \todo Can be made faster.
+ */
+int drm_order( unsigned long size )
+{
+ int order;
+ unsigned long tmp;
+
+ for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++)
+ ;
+
+ if (size & (size - 1))
+ ++order;
+
+ return order;
+}
+EXPORT_SYMBOL(drm_order);
projects / deliverable / linux.git / blobdiff