Cleanup of the d_mmap_t interface.

- Get rid of the useless atop() / pmap_phys_address() detour.  The
  device mmap handlers must now give back the physical address
  without atop()'ing it.
- Don't borrow the physical address of the mapping in the returned
  int.  Now we properly pass a vm_offset_t * and expect it to be
  filled by the mmap handler when the mapping was successful.  The
  mmap handler must now return 0 when successful, any other value
  is considered as an error.  Previously, returning -1 was the only
  way to fail.  This change thus accidentally fixes some devices
  which were bogusly returning errno constants which would have been
  considered as addresses by the device pager.
- Garbage collect the poorly named pmap_phys_address() now that it's
  no longer used.
- Convert all the d_mmap_t consumers to the new API.

I'm still not sure wheter we need a __FreeBSD_version bump for this,
since and we didn't guarantee API/ABI stability until 5.1-RELEASE.

Discussed with:		alc, phk, jake
Reviewed by:		peter
Compile-tested on:	LINT (i386), GENERIC (alpha and sparc64)
Runtime-tested on:	i386

1 files changed, 7 insertions, 12 deletions

diff --git a/sys/dev/fb/vga.c b/sys/dev/fb/vga.c
index 56e015b..562f716 100644
--- a/sys/dev/fb/vga.c
+++ b/sys/dev/fb/vga.c
@@ -133,9 +133,10 @@ vga_ioctl(dev_t dev, vga_softc_t *sc, u_long cmd, caddr_t arg, int flag,
 }
 
 int
-vga_mmap(dev_t dev, vga_softc_t *sc, vm_offset_t offset, int prot)
+vga_mmap(dev_t dev, vga_softc_t *sc, vm_offset_t offset, vm_offset_t *paddr,
+	 int prot)
 {
-	return genfbmmap(&sc->gensc, sc->adp, offset, prot);
+	return genfbmmap(&sc->gensc, sc->adp, offset, paddr, prot);
 }
 
 #endif /* FB_INSTALL_CDEV */
@@ -2449,7 +2450,8 @@ vga_blank_display(video_adapter_t *adp, int mode)
  * all adapters
  */
 static int
-vga_mmap_buf(video_adapter_t *adp, vm_offset_t offset, int prot)
+vga_mmap_buf(video_adapter_t *adp, vm_offset_t offset, vm_offset_t *paddr,
+   	     int prot)
 {
     if (adp->va_info.vi_flags & V_INFO_LINEAR)
 	return -1;
@@ -2463,15 +2465,8 @@ vga_mmap_buf(video_adapter_t *adp, vm_offset_t offset, int prot)
     if (offset > adp->va_window_size - PAGE_SIZE)
 	return -1;
 
-#ifdef __i386__
-    return i386_btop(adp->va_info.vi_window + offset);
-#endif
-#ifdef __alpha__
-    return alpha_btop(adp->va_info.vi_window + offset);
-#endif
-#ifdef __ia64__
-    return ia64_btop(adp->va_info.vi_window + offset);
-#endif
+    *paddr = adp->va_info.vi_window + offset;
+    return 0;
 }
 
 #ifndef VGA_NO_MODE_CHANGE