| 1,3 → 1,5 |
|---|
| #include <ddk.h> |
| #include <linux/mm.h> |
| #include <drm/drmP.h> |
| #include <drm/i915_drm.h> |
| #include "i915_drv.h" |
| 57,3 → 59,39 |
|---|
| |
| return page; |
| }; |
| |
| unsigned long vm_mmap(struct file *file, unsigned long addr, |
| unsigned long len, unsigned long prot, |
| unsigned long flag, unsigned long offset) |
| { |
| char *mem, *ptr; |
| int i; |
| |
| if (unlikely(offset + PAGE_ALIGN(len) < offset)) |
| return -EINVAL; |
| if (unlikely(offset & ~PAGE_MASK)) |
| return -EINVAL; |
| |
| mem = UserAlloc(len); |
| if(unlikely(mem == NULL)) |
| return -ENOMEM; |
| |
| for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096) |
| { |
| struct page *page; |
| |
| page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0); |
| |
| if (unlikely(IS_ERR(page))) |
| goto err; |
| |
| MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW); |
| } |
| |
| return (unsigned long)mem; |
| err: |
| UserFree(mem); |
| return -ENOMEM; |
| }; |
| |
| |