int
SYSPVRMMap(struct file* pFile, struct vm_area_struct* ps_vma)
{
int ret;
ret = PVRMMap(pFile, ps_vma);
if (ret == -ENOENT)
{
ret = drm_mmap(pFile, ps_vma);
}
return ret;
}
/*
* Create a virtual address mapping for physical pages of memory.
*
* This needs to handle requrests for both the EMGD display driver
* and the IMG 2D/3D drivers.
*
* If the page offset falls below the 256MB limit for display,
* then map display memory. If above, route to the IMG handler.
*/
int emgd_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
drm_emgd_priv_t *emgd_priv;
gmm_chunk_t *chunk;
unsigned long offset;
/*
* re-direct offsets beyond the 256MB display range to PVRMMap
*/
if (vma->vm_pgoff > DRM_PSB_FILE_PAGE_OFFSET) {
EMGD_DEBUG("emgd_mmap: Calling PVRMMap().");
return PVRMMap(filp, vma);
}
file_priv = (struct drm_file *) filp->private_data;
emgd_priv = (drm_emgd_priv_t *)file_priv->minor->dev->dev_private;
offset = vma->vm_pgoff << PAGE_SHIFT;
/*
* Look up the buffer in the gmm chunk list based on offset
* and size.
*/
/* chunk = emgd_priv->context->dispatch->gmm_get_chunk(vma->vm_pgoff);*/
chunk = gmm_get_chunk(emgd_priv->context, offset);
if (chunk == NULL) {
printk(KERN_ERR "emgd_mmap: Failed to find memory at 0x%lx.", offset);
}
/*
* Fill in the vma
*/
vma->vm_ops = &emgd_vm_ops;
vma->vm_private_data = chunk;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
#else
vma->vm_flags |= VM_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0)
pgprot_val(vma->vm_page_prot) =
pgprot_val(vma->vm_page_prot) | _PAGE_CACHE_MODE_UC_MINUS;
#else
pgprot_val(vma->vm_page_prot) =
pgprot_val(vma->vm_page_prot) | _PAGE_CACHE_UC_MINUS;
#endif
return 0;
}
