fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / drivers / char / agp / uninorth-agp.c

diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
index 1de1b12..dffc193 100644 (file)
--- a/drivers/char/agp/uninorth-agp.c
+++ b/drivers/char/agp/uninorth-agp.c
@@ -27,32 +27,42 @@
 static int uninorth_rev;
 static int is_u3;
 
+static char __devinitdata *aperture = NULL;
 
 static int uninorth_fetch_size(void)
 {
-       int i;
-       u32 temp;
-       struct aper_size_info_32 *values;
-
-       pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_BASE, &temp);
-       temp &= ~(0xfffff000);
-       values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
-
-       for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
-               if (temp == values[i].size_value) {
-                       agp_bridge->previous_size =
-                           agp_bridge->current_size = (void *) (values + i);
-                       agp_bridge->aperture_size_idx = i;
-                       return values[i].size;
+       int i, size = 0;
+       struct aper_size_info_32 *values =
+           A_SIZE_32(agp_bridge->driver->aperture_sizes);
+
+       if (aperture) {
+               char *save = aperture;
+
+               size = memparse(aperture, &aperture) >> 20;
+               aperture = save;
+
+               for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
+                       if (size == values[i].size)
+                               break;
+
+               if (i == agp_bridge->driver->num_aperture_sizes) {
+                       printk(KERN_ERR PFX "Invalid aperture size, using"
+                              " default\n");
+                       size = 0;
+                       aperture = NULL;
                }
        }
 
-       agp_bridge->previous_size =
-           agp_bridge->current_size = (void *) (values + 1);
-       agp_bridge->aperture_size_idx = 1;
-       return values[1].size;
+       if (!size) {
+               for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
+                       if (values[i].size == 32)
+                               break;
+       }
 
-       return 0;
+       agp_bridge->previous_size =
+           agp_bridge->current_size = (void *)(values + i);
+       agp_bridge->aperture_size_idx = i;
+       return values[i].size;
 }
 
 static void uninorth_tlbflush(struct agp_memory *mem)
@@ -601,8 +611,8 @@ static int __devinit agp_uninorth_probe(struct pci_dev *pdev,
                uninorth_node = of_find_node_by_name(NULL, "u3");
        }
        if (uninorth_node) {
-               int *revprop = (int *)
-                       get_property(uninorth_node, "device-rev", NULL);
+               const int *revprop = get_property(uninorth_node,
+                               "device-rev", NULL);
                if (revprop != NULL)
                        uninorth_rev = *revprop & 0x3f;
                of_node_put(uninorth_node);
@@ -683,5 +693,11 @@ static void __exit agp_uninorth_cleanup(void)
 module_init(agp_uninorth_init);
 module_exit(agp_uninorth_cleanup);
 
+module_param(aperture, charp, 0);
+MODULE_PARM_DESC(aperture,
+                "Aperture size, must be power of two between 4MB and an\n"
+                "\t\tupper limit specific to the UniNorth revision.\n"
+                "\t\tDefault: 32M");
+
 MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
 MODULE_LICENSE("GPL");