Instead of the DRM framebuffer, pass the FB info strcuture to the
fbdev page-fault handler psb_fbdev_vm_fault(). The framebuffer is a
high-level data structure and does not belong into fault handling.
The fb_info has all necessary information. Also set fix.smem_start
to the correct value (the beginning of the framebuffer in physical
address space) and streamline the page-fault handler.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/gma500/fbdev.c | 39 ++++++++++++----------------------
1 file changed, 14 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/gma500/fbdev.c b/drivers/gpu/drm/gma500/fbdev.c
index a70ca4c5013f..c8dbcb33ddb5 100644
--- a/drivers/gpu/drm/gma500/fbdev.c
+++ b/drivers/gpu/drm/gma500/fbdev.c
@@ -22,32 +22,24 @@
static vm_fault_t psb_fbdev_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
- struct drm_framebuffer *fb = vma->vm_private_data;
- struct drm_device *dev = fb->dev;
- struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- struct psb_gem_object *pobj = to_psb_gem_object(fb->obj[0]);
- int page_num;
- int i;
- unsigned long address;
- vm_fault_t ret = VM_FAULT_SIGBUS;
- unsigned long pfn;
- unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + pobj->offset;
-
- page_num = vma_pages(vma);
- address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
+ struct fb_info *info = vma->vm_private_data;
+ unsigned long address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
+ unsigned long pfn = info->fix.smem_start >> PAGE_SHIFT;
+ vm_fault_t err = VM_FAULT_SIGBUS;
+ unsigned long page_num = vma_pages(vma);
+ unsigned long i;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- for (i = 0; i < page_num; i++) {
- pfn = (phys_addr >> PAGE_SHIFT);
-
- ret = vmf_insert_mixed(vma, address, __pfn_to_pfn_t(pfn, PFN_DEV));
- if (unlikely(ret & VM_FAULT_ERROR))
+ for (i = 0; i < page_num; ++i) {
+ err = vmf_insert_mixed(vma, address, __pfn_to_pfn_t(pfn, PFN_DEV));
+ if (unlikely(err & VM_FAULT_ERROR))
break;
address += PAGE_SIZE;
- phys_addr += PAGE_SIZE;
+ ++pfn;
}
- return ret;
+
+ return err;
}
static const struct vm_operations_struct psb_fbdev_vm_ops = {
@@ -102,9 +94,6 @@ static int psb_fbdev_fb_setcolreg(unsigned int regno,
static int psb_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
- struct drm_fb_helper *fb_helper = info->par;
- struct drm_framebuffer *fb = fb_helper->fb;
-
if (vma->vm_pgoff != 0)
return -EINVAL;
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
@@ -116,7 +105,7 @@ static int psb_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
* suitable for our mmap work
*/
vma->vm_ops = &psb_fbdev_vm_ops;
- vma->vm_private_data = (void *)fb;
+ vma->vm_private_data = info;
vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
return 0;
@@ -235,7 +224,7 @@ static int psbfb_probe(struct drm_fb_helper *fb_helper,
drm_fb_helper_fill_info(info, fb_helper, sizes);
- info->fix.smem_start = dev_priv->fb_base;
+ info->fix.smem_start = dev_priv->stolen_base + backing->offset;
info->fix.smem_len = size;
info->fix.ywrapstep = 0;
info->fix.ypanstep = 0;
--
2.39.2
