Previously, drm_get_resource_start() and drm_get_resource_len() would

    allocate the resource RF_ACTIVE, pull out the appropriate value, and
    return it. However, allocating large framebuffers RF_ACTIVE would run
    the system out of KVA, and this also left open the possibility of the
    resource getting moved after getting the offset. Instead, when either
    of these are called, allocate the resource if it isn't allocated
    already (non-RF_ACTIVE) and store it in the DRM device, to be cleaned
    up on lastclose.

1 files changed, 7 insertions, 0 deletions

diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h
index d5907355..751714b6 100644
--- a/bsd-core/drmP.h
+++ b/bsd-core/drmP.h
@@ -686,6 +686,9 @@ struct drm_driver_info {
 	unsigned use_mtrr :1;
 };
 
+/* Length for the array of resource pointers for drm_get_resource_*. */
+#define DRM_MAX_PCI_RESOURCE	3
+
 /** 
  * DRM device functions structure
  */
@@ -748,6 +751,10 @@ struct drm_device {
 #endif
 	void		  *irqh;	/* Handle from bus_setup_intr      */
 
+	/* Storage of resource pointers for drm_get_resource_* */
+	struct resource   *pcir[DRM_MAX_PCI_RESOURCE];
+	int		  pcirid[DRM_MAX_PCI_RESOURCE];
+
 	int		  pci_domain;
 	int		  pci_bus;
 	int		  pci_slot;