| 0,0 → 1,59 |
|---|
| #include <drm/drmP.h> |
| #include <drm/i915_drm.h> |
| #include "i915_drv.h" |
| #include "intel_drv.h" |
| |
| |
| struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags) |
| { |
| struct file *filep; |
| int count; |
| |
| filep = malloc(sizeof(*filep)); |
| |
| if(unlikely(filep == NULL)) |
| return ERR_PTR(-ENOMEM); |
| |
| count = size / PAGE_SIZE; |
| |
| filep->pages = kzalloc(sizeof(struct page *) * count, 0); |
| if(unlikely(filep->pages == NULL)) |
| { |
| kfree(filep); |
| return ERR_PTR(-ENOMEM); |
| }; |
| |
| filep->count = count; |
| filep->allocated = 0; |
| filep->vma = NULL; |
| |
| // dbgprintf("%s file %p pages %p count %d\n", |
| // __FUNCTION__,filep, filep->pages, filep->pages); |
| |
| return filep; |
| } |
| |
| struct page *shmem_read_mapping_page_gfp(struct file *filep, |
| pgoff_t index, gfp_t gfp) |
| { |
| struct page *page; |
| |
| // dbgprintf("%s, file %p index %d\n", __FUNCTION__, filep, index); |
| |
| if(unlikely(index >= filep->count)) |
| return ERR_PTR(-EINVAL); |
| |
| page = filep->pages[index]; |
| |
| if(unlikely(page == NULL)) |
| { |
| page = (struct page *)AllocPage(); |
| |
| if(unlikely(page == NULL)) |
| return ERR_PTR(-ENOMEM); |
| |
| filep->pages[index] = page; |
| }; |
| |
| return page; |
| }; |