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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-21 17:16:56 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-21 17:16:56 (GMT) |
commit | 12c71c4b601923a9cc28918e944ec1e8c65ddac9 (patch) | |
tree | 6644964fa831ea4f11451b05947da904726f76d5 /drivers | |
parent | 830ac8524f301da8867400777d5c19e6d01ec525 (diff) | |
parent | f86b11fbc772b5a4926855c6bc1ff3a3d99995a7 (diff) | |
download | linux-fsl-qoriq-12c71c4b601923a9cc28918e944ec1e8c65ddac9.tar.xz |
Merge branch 'vm_ioremap_memory-examples'
I'm going to do an -rc8, so I'm just going to do this rather than delay
it any further. They are arguably stable material anyway.
* vm_ioremap_memory-examples:
mtdchar: remove no-longer-used vma helpers
vm: convert snd_pcm_lib_mmap_iomem() to vm_iomap_memory() helper
vm: convert fb_mmap to vm_iomap_memory() helper
vm: convert mtdchar mmap to vm_iomap_memory() helper
vm: convert HPET mmap to vm_iomap_memory() helper
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/char/hpet.c | 14 | ||||
-rw-r--r-- | drivers/mtd/mtdchar.c | 59 | ||||
-rw-r--r-- | drivers/video/fbmem.c | 39 |
3 files changed, 17 insertions, 95 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index e3f9a99..d784650 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -373,26 +373,14 @@ static int hpet_mmap(struct file *file, struct vm_area_struct *vma) struct hpet_dev *devp; unsigned long addr; - if (((vma->vm_end - vma->vm_start) != PAGE_SIZE) || vma->vm_pgoff) - return -EINVAL; - devp = file->private_data; addr = devp->hd_hpets->hp_hpet_phys; if (addr & (PAGE_SIZE - 1)) return -ENOSYS; - vma->vm_flags |= VM_IO; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - - if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT, - PAGE_SIZE, vma->vm_page_prot)) { - printk(KERN_ERR "%s: io_remap_pfn_range failed\n", - __func__); - return -EAGAIN; - } - - return 0; + return vm_iomap_memory(vma, addr, PAGE_SIZE); #else return -ENOSYS; #endif diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 92ab30a..dc571eb 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1123,33 +1123,6 @@ static unsigned long mtdchar_get_unmapped_area(struct file *file, } #endif -static inline unsigned long get_vm_size(struct vm_area_struct *vma) -{ - return vma->vm_end - vma->vm_start; -} - -static inline resource_size_t get_vm_offset(struct vm_area_struct *vma) -{ - return (resource_size_t) vma->vm_pgoff << PAGE_SHIFT; -} - -/* - * Set a new vm offset. - * - * Verify that the incoming offset really works as a page offset, - * and that the offset and size fit in a resource_size_t. - */ -static inline int set_vm_offset(struct vm_area_struct *vma, resource_size_t off) -{ - pgoff_t pgoff = off >> PAGE_SHIFT; - if (off != (resource_size_t) pgoff << PAGE_SHIFT) - return -EINVAL; - if (off + get_vm_size(vma) - 1 < off) - return -EINVAL; - vma->vm_pgoff = pgoff; - return 0; -} - /* * set up a mapping for shared memory segments */ @@ -1159,45 +1132,17 @@ static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; struct map_info *map = mtd->priv; - resource_size_t start, off; - unsigned long len, vma_len; /* This is broken because it assumes the MTD device is map-based and that mtd->priv is a valid struct map_info. It should be replaced with something that uses the mtd_get_unmapped_area() operation properly. */ if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { - off = get_vm_offset(vma); - start = map->phys; - len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size); - start &= PAGE_MASK; - vma_len = get_vm_size(vma); - - /* Overflow in off+len? */ - if (vma_len + off < off) - return -EINVAL; - /* Does it fit in the mapping? */ - if (vma_len + off > len) - return -EINVAL; - - off += start; - /* Did that overflow? */ - if (off < start) - return -EINVAL; - if (set_vm_offset(vma, off) < 0) - return -EINVAL; - vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; - #ifdef pgprot_noncached - if (file->f_flags & O_DSYNC || off >= __pa(high_memory)) + if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory)) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); #endif - if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, - vma->vm_page_prot)) - return -EAGAIN; - - return 0; + return vm_iomap_memory(vma, map->phys, map->size); } return -ENOSYS; #else diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 7c25408..86291dc 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1373,15 +1373,12 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) { struct fb_info *info = file_fb_info(file); struct fb_ops *fb; - unsigned long off; + unsigned long mmio_pgoff; unsigned long start; u32 len; if (!info) return -ENODEV; - if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) - return -EINVAL; - off = vma->vm_pgoff << PAGE_SHIFT; fb = info->fbops; if (!fb) return -ENODEV; @@ -1393,32 +1390,24 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) return res; } - /* frame buffer memory */ + /* + * Ugh. This can be either the frame buffer mapping, or + * if pgoff points past it, the mmio mapping. + */ start = info->fix.smem_start; - len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); - if (off >= len) { - /* memory mapped io */ - off -= len; - if (info->var.accel_flags) { - mutex_unlock(&info->mm_lock); - return -EINVAL; - } + len = info->fix.smem_len; + mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; + if (vma->vm_pgoff >= mmio_pgoff) { + vma->vm_pgoff -= mmio_pgoff; start = info->fix.mmio_start; - len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); + len = info->fix.mmio_len; } mutex_unlock(&info->mm_lock); - start &= PAGE_MASK; - if ((vma->vm_end - vma->vm_start + off) > len) - return -EINVAL; - off += start; - vma->vm_pgoff = off >> PAGE_SHIFT; - /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by io_remap_pfn_range()*/ + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); - fb_pgprotect(file, vma, off); - if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, vma->vm_page_prot)) - return -EAGAIN; - return 0; + fb_pgprotect(file, vma, start); + + return vm_iomap_memory(vma, start, len); } static int |