Allocate framebuffer PCI BAR if left uninitialized by firmware.

ok mlarkin@

diff --git a/sys/dev/pci/drm/radeon/radeon_kms.c b/sys/dev/pci/drm/radeon/radeon_kms.c
index 590b99d..acc0fbc 100644 (file)
--- a/sys/dev/pci/drm/radeon/radeon_kms.c
+++ b/sys/dev/pci/drm/radeon/radeon_kms.c
@@ -485,6 +485,26 @@ radeondrm_attach_kms(struct device *parent, struct device *self, void *aux)
                printf(": can't get frambuffer info\n");
                return;
        }
+#if !defined(__sparc64__)
+       if (rdev->fb_aper_offset == 0) {
+               bus_size_t start, end;
+               bus_addr_t base;
+
+               start = max(PCI_MEM_START, pa->pa_memex->ex_start);
+               end = min(PCI_MEM_END, pa->pa_memex->ex_end);
+               if (pa->pa_memex == NULL ||
+                   extent_alloc_subregion(pa->pa_memex, start, end,
+                   rdev->fb_aper_size, rdev->fb_aper_size, 0, 0, 0, &base)) {
+                       printf(": can't reserve framebuffer space\n");
+                       return;
+               }
+               pci_conf_write(pa->pa_pc, pa->pa_tag, RADEON_PCI_MEM, base);
+               if (PCI_MAPREG_MEM_TYPE(type) == PCI_MAPREG_MEM_TYPE_64BIT)
+                       pci_conf_write(pa->pa_pc, pa->pa_tag,
+                           RADEON_PCI_MEM + 4, (uint64_t)base >> 32);
+               rdev->fb_aper_offset = base;
+       }
+#endif
 
        for (i = PCI_MAPREG_START; i < PCI_MAPREG_END ; i+= 4) {
                type = pci_mapreg_type(pa->pa_pc, pa->pa_tag, i);