diff options
Diffstat (limited to 'drivers/vme')
| -rw-r--r-- | drivers/vme/vme.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c index d95fb848dd03..6bab2c4ed77c 100644 --- a/drivers/vme/vme.c +++ b/drivers/vme/vme.c @@ -609,6 +609,32 @@ unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask, } EXPORT_SYMBOL(vme_master_rmw); +int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma) +{ + struct vme_master_resource *image; + phys_addr_t phys_addr; + unsigned long vma_size; + + if (resource->type != VME_MASTER) { + pr_err("Not a master resource\n"); + return -EINVAL; + } + + image = list_entry(resource->entry, struct vme_master_resource, list); + phys_addr = image->bus_resource.start + (vma->vm_pgoff << PAGE_SHIFT); + vma_size = vma->vm_end - vma->vm_start; + + if (phys_addr + vma_size > image->bus_resource.end + 1) { + pr_err("Map size cannot exceed the window size\n"); + return -EFAULT; + } + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + return vm_iomap_memory(vma, phys_addr, vma->vm_end - vma->vm_start); +} +EXPORT_SYMBOL(vme_master_mmap); + void vme_master_free(struct vme_resource *resource) { struct vme_master_resource *master_image; |