Merged sarea-1-0-0

1 files changed, 100 insertions, 54 deletions

diff --git a/linux/drm_vm.h b/linux/drm_vm.h
index 347816ac..123eea29 100644
--- a/linux/drm_vm.h
+++ b/linux/drm_vm.h
@@ -41,13 +41,7 @@ struct vm_operations_struct   drm_vm_ops = {
 struct vm_operations_struct   drm_vm_shm_ops = {
 	nopage:	 DRM(vm_shm_nopage),
 	open:	 DRM(vm_open),
-	close:	 DRM(vm_close),
-};
-
-struct vm_operations_struct   drm_vm_shm_lock_ops = {
-	nopage:	 DRM(vm_shm_nopage_lock),
-	open:	 DRM(vm_open),
-	close:	 DRM(vm_close),
+	close:	 DRM(vm_shm_close),
 };
 
 struct vm_operations_struct   drm_vm_dma_ops = {
@@ -88,12 +82,26 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 #endif
 	unsigned long	 physical;
 	unsigned long	 offset;
+	unsigned long	 i;
+	pgd_t		 *pgd;
+	pmd_t		 *pmd;
+	pte_t		 *pte;
 
 	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
 	if (!map)    		   return NOPAGE_OOM;  /* Nothing allocated */
 
 	offset	 = address - vma->vm_start;
-	physical = (unsigned long)map->handle + offset;
+	i = (unsigned long)map->handle + offset;
+	/* We have to walk page tables here because we need large SAREA's, and
+	 * they need to be virtually contigious in kernel space.
+	 */
+	pgd = pgd_offset_k( i );
+	if( !pgd_present( *pgd ) ) return NOPAGE_OOM;
+	pmd = pmd_offset( pgd, i );
+	if( !pmd_present( *pmd ) ) return NOPAGE_OOM;
+	pte = pte_offset( pmd, i );
+	if( !pte_present( *pte ) ) return NOPAGE_OOM;
+	physical = (unsigned long)pte_page( *pte )->virtual;
 	atomic_inc(&virt_to_page(physical)->count); /* Dec. by kernel */
 
 	DRM_DEBUG("0x%08lx => 0x%08lx\n", address, physical);
@@ -104,37 +112,87 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 #endif
 }
 
-#if LINUX_VERSION_CODE < 0x020317
-unsigned long DRM(vm_shm_nopage_lock)(struct vm_area_struct *vma,
-				      unsigned long address,
-				      int write_access)
-#else
-				/* Return type changed in 2.3.23 */
-struct page *DRM(vm_shm_nopage_lock)(struct vm_area_struct *vma,
-				     unsigned long address,
-				     int write_access)
-#endif
+/* Special close routine which deletes map information if we are the last
+ * person to close a mapping and its not in the global maplist.
+ */
+
+void DRM(vm_shm_close)(struct vm_area_struct *vma)
 {
-	drm_file_t	 *priv	 = vma->vm_file->private_data;
-	drm_device_t	 *dev	 = priv->dev;
-	unsigned long	 physical;
-	unsigned long	 offset;
-	unsigned long	 page;
+	drm_file_t	*priv	= vma->vm_file->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_vma_entry_t *pt, *prev;
+	drm_map_t *map;
+	drm_map_list_t *r_list;
+	struct list_head *list;
+	int found_maps = 0;
 
-	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
-	if (!dev->lock.hw_lock)    return NOPAGE_OOM;  /* Nothing allocated */
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+#if LINUX_VERSION_CODE < 0x020333
+	MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
+#endif
+	atomic_dec(&dev->vma_count);
 
-	offset	 = address - vma->vm_start;
-	page	 = offset >> PAGE_SHIFT;
-	physical = (unsigned long)dev->lock.hw_lock + offset;
-	atomic_inc(&virt_to_page(physical)->count); /* Dec. by kernel */
+#if LINUX_VERSION_CODE >= 0x020300
+	map = vma->vm_private_data;
+#else
+	map = vma->vm_pte;
+#endif
 
-	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical);
-#if LINUX_VERSION_CODE < 0x020317
-	return physical;
+	down(&dev->struct_sem);
+	for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
+#if LINUX_VERSION_CODE >= 0x020300
+		if (pt->vma->vm_private_data == map) found_maps++;
 #else
-	return virt_to_page(physical);
+		if (pt->vma->vm_pte == map) found_maps++;
 #endif
+		if (pt->vma == vma) {
+			if (prev) {
+				prev->next = pt->next;
+			} else {
+				dev->vmalist = pt->next;
+			}
+			DRM(free)(pt, sizeof(*pt), DRM_MEM_VMAS);
+		}
+	}
+	/* We were the only map that was found */
+	if(found_maps == 1 && 
+	   map->flags & _DRM_REMOVABLE) {
+		/* Check to see if we are in the maplist, if we are not, then
+		 * we delete this mappings information.
+		 */
+		found_maps = 0;
+		list = &dev->maplist->head;
+		list_for_each(list, &dev->maplist->head) {
+			r_list = (drm_map_list_t *) list;
+			if (r_list->map == map) found_maps++;
+		}
+
+		if(!found_maps) {
+			switch (map->type) {
+			case _DRM_REGISTERS:
+			case _DRM_FRAME_BUFFER:
+#ifdef __REALLY_HAVE_MTRR
+				if (map->mtrr >= 0) {
+					int retcode;
+					retcode = mtrr_del(map->mtrr,
+							   map->offset,
+							   map->size);
+					DRM_DEBUG("mtrr_del = %d\n", retcode);
+				}
+#endif
+				DRM(ioremapfree)(map->handle, map->size);
+				break;
+			case _DRM_SHM:
+				vfree(map->handle);
+				break;
+			case _DRM_AGP:
+				break;
+			}
+			DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
+		}
+	}
+	up(&dev->struct_sem);
 }
 
 #if LINUX_VERSION_CODE < 0x020317
@@ -176,9 +234,7 @@ void DRM(vm_open)(struct vm_area_struct *vma)
 {
 	drm_file_t	*priv	= vma->vm_file->private_data;
 	drm_device_t	*dev	= priv->dev;
-#if DRM_DEBUG_CODE
 	drm_vma_entry_t *vma_entry;
-#endif
 
 	DRM_DEBUG("0x%08lx,0x%08lx\n",
 		  vma->vm_start, vma->vm_end - vma->vm_start);
@@ -188,8 +244,6 @@ void DRM(vm_open)(struct vm_area_struct *vma)
 	MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */
 #endif
 
-
-#if DRM_DEBUG_CODE
 	vma_entry = DRM(alloc)(sizeof(*vma_entry), DRM_MEM_VMAS);
 	if (vma_entry) {
 		down(&dev->struct_sem);
@@ -199,16 +253,13 @@ void DRM(vm_open)(struct vm_area_struct *vma)
 		dev->vmalist	= vma_entry;
 		up(&dev->struct_sem);
 	}
-#endif
 }
 
 void DRM(vm_close)(struct vm_area_struct *vma)
 {
 	drm_file_t	*priv	= vma->vm_file->private_data;
 	drm_device_t	*dev	= priv->dev;
-#if DRM_DEBUG_CODE
 	drm_vma_entry_t *pt, *prev;
-#endif
 
 	DRM_DEBUG("0x%08lx,0x%08lx\n",
 		  vma->vm_start, vma->vm_end - vma->vm_start);
@@ -217,7 +268,6 @@ void DRM(vm_close)(struct vm_area_struct *vma)
 #endif
 	atomic_dec(&dev->vma_count);
 
-#if DRM_DEBUG_CODE
 	down(&dev->struct_sem);
 	for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
 		if (pt->vma == vma) {
@@ -231,7 +281,6 @@ void DRM(vm_close)(struct vm_area_struct *vma)
 		}
 	}
 	up(&dev->struct_sem);
-#endif
 }
 
 int DRM(mmap_dma)(struct file *filp, struct vm_area_struct *vma)
@@ -272,7 +321,8 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 	drm_file_t	*priv	= filp->private_data;
 	drm_device_t	*dev	= priv->dev;
 	drm_map_t	*map	= NULL;
-	int		i;
+	drm_map_list_t  *r_list;
+	struct list_head *list;
 
 	DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
 		  vma->vm_start, vma->vm_end, VM_OFFSET(vma));
@@ -286,12 +336,13 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 				   once, so it doesn't have to be optimized
 				   for performance, even if the list was a
 				   bit longer. */
-	for (i = 0; i < dev->map_count; i++) {
-		map = dev->maplist[i];
+	list_for_each(list, &dev->maplist->head) {
+		r_list = (drm_map_list_t *)list;
+		map = r_list->map;
+		if (!map) continue;
 		if (map->offset == VM_OFFSET(vma)) break;
 	}
 
-	if (i >= dev->map_count) return -EINVAL;
 	if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
 		return -EPERM;
 
@@ -339,17 +390,12 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 		vma->vm_ops = &drm_vm_ops;
 		break;
 	case _DRM_SHM:
-		if (map->flags & _DRM_CONTAINS_LOCK)
-			vma->vm_ops = &drm_vm_shm_lock_ops;
-		else {
-			vma->vm_ops = &drm_vm_shm_ops;
+		vma->vm_ops = &drm_vm_shm_ops;
 #if LINUX_VERSION_CODE >= 0x020300
-			vma->vm_private_data = (void *)map;
+		vma->vm_private_data = (void *)map;
 #else
-			vma->vm_pte = (unsigned long)map;
+		vma->vm_pte = (unsigned long)map;
 #endif
-		}
-
 				/* Don't let this area swap.  Change when
 				   DRM_KERNEL advisory is supported. */
 		vma->vm_flags |= VM_LOCKED;