Resize Bar

pci_resize_resource()

1. intel

   static void
   
   _resize_bar(struct drm_i915_private *i915, int resno, resource_size_t size)
   
   {
   
       struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
   
       int bar_size = pci_rebar_bytes_to_size(size);
   
       int ret;
   
   
   
       _release_bars(pdev);
   
   
   
       ret = pci_resize_resource(pdev, resno, bar_size);
   
       if (ret) {
   
           drm_info(&i915->drm, "Failed to resize BAR%d to %dM (%pe)\n",
   
                resno, 1 << bar_size, ERR_PTR(ret));
   
           return;
   
       }
   
   
   
       drm_info(&i915->drm, "BAR%d resized to %dM\n", resno, 1 << bar_size);
   
   }
   

2. amd AMDKCL_ENABLE_RESIZE_FB_BAR