drm: rework radeon memory map (radeon 1.23)

This code reworks the radeon memory map so it works better
for newer r300 chips and for a lot of older PCI chips.

It really requires a new X driver in order to take advantage of this code.

From: Ben Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/char/drm/r300_cmdbuf.c b/drivers/char/drm/r300_cmdbuf.c
index 9fbadb965858..20b6cb39213d 100644
--- a/drivers/char/drm/r300_cmdbuf.c
+++ b/drivers/char/drm/r300_cmdbuf.c
@@ -242,8 +242,10 @@ static __inline__ int r300_check_range(unsigned reg, int count)
         return 0;
 }
 
-  /* we expect offsets passed to the framebuffer to be either within video memory or
-     within AGP space */
+/*
+ * we expect offsets passed to the framebuffer to be either within video 
+ * memory or within AGP space 
+ */
 static __inline__ int r300_check_offset(drm_radeon_private_t *dev_priv,
                                         u32 offset)
 {
@@ -251,11 +253,11 @@ static __inline__ int r300_check_offset(drm_radeon_private_t *dev_priv,
            but this value is not being kept.
            This code is correct for now (does the same thing as the
            code that sets MC_FB_LOCATION) in radeon_cp.c */
-        if ((offset >= dev_priv->fb_location) &&
-            (offset < dev_priv->gart_vm_start))
+        if (offset >= dev_priv->fb_location &&
+            offset < (dev_priv->fb_location + dev_priv->fb_size))
                 return 0;
-        if ((offset >= dev_priv->gart_vm_start) &&
-            (offset < dev_priv->gart_vm_start + dev_priv->gart_size))
+        if (offset >= dev_priv->gart_vm_start &&
+            offset < (dev_priv->gart_vm_start + dev_priv->gart_size))
                 return 0;
         return 1;
 }
@@ -490,6 +492,7 @@ static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t *dev_priv,
 
         return 0;
 }
+
 static __inline__ int r300_emit_bitblt_multi(drm_radeon_private_t *dev_priv,
                                              drm_radeon_kcmd_buffer_t *cmdbuf)
 {