From: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
Date: Mon, 2 Oct 2006 13:06:35 +0000 (+0200)
Subject: Make the user_token 44-bit for TTMs, and have them occupy a unique file space
X-Git-Tag: submit/1.0/20121108.012404~1353^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eacedf41a65f135722e7bee6f1a66a803619237f;p=profile%2Fivi%2Flibdrm.git

Make the user_token 44-bit for TTMs, and have them occupy a unique file space
starting at 0x00100000000. This will hopefully allow us to use
unmap_mapping_range(). Note that user-space will need
64-bit file offset support.
---

diff --git a/configure.ac b/configure.ac
index 69b111f..b5d7945 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,7 @@ AC_PROG_LIBTOOL
 AC_PROG_CC
 
 AC_HEADER_STDC
+AC_SYS_LARGEFILE
 
 pkgconfigdir=${libdir}/pkgconfig
 AC_SUBST(pkgconfigdir)
diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index ab884eb..bce913d 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -46,6 +46,9 @@
 #  include <sys/mman.h>
 # endif
 #else
+# ifdef HAVE_CONFIG_H
+#  include <config.h>
+# endif
 # include <stdio.h>
 # include <stdlib.h>
 # include <unistd.h>
@@ -2804,7 +2807,7 @@ int drmBOUnReference(int fd, drmBO *buf)
     
 
     if (buf->mapVirtual && (buf->type != drm_bo_type_fake)) {
-	(void) drmUnmap(buf->mapVirtual, buf->start + buf->size);
+	(void) munmap(buf->mapVirtual, buf->start + buf->size);
 	buf->mapVirtual = NULL;
 	buf->virtual = NULL;
     }
@@ -2847,8 +2850,12 @@ int drmBOMap(int fd, drmBO *buf, unsigned mapFlags, unsigned mapHint,
 
     if (!buf->virtual && buf->type != drm_bo_type_fake) {
 	drmAddress virtual;
-	ret = drmMap(fd, buf->mapHandle, buf->size + buf->start, &virtual);
-	if (ret)
+	virtual = mmap(0, buf->size + buf->start, 
+		       PROT_READ | PROT_WRITE, MAP_SHARED,
+		       fd, buf->mapHandle);
+	if (virtual == MAP_FAILED)
+	    ret = -errno;
+	if (ret) 
 	    return ret;
 	buf->mapVirtual = virtual;
 	buf->virtual = ((char *) virtual) + buf->start;
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index 5fbe283..311c57f 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -817,6 +817,11 @@ static void drm_ttm_object_remove(drm_device_t * dev, drm_ttm_object_t * object)
 	if (list->user_token)
 		drm_ht_remove_item(&dev->map_hash, &list->hash);
 
+	if (list->file_offset_node) {
+		drm_mm_put_block(&dev->offset_manager, list->file_offset_node);
+		list->file_offset_node = NULL;
+	}
+
 	map = list->map;
 
 	if (map) {
@@ -901,15 +906,24 @@ int drm_ttm_object_create(drm_device_t * dev, unsigned long size,
 	map->size = ttm->num_pages * PAGE_SIZE;
 	map->handle = (void *)object;
 
-	if (drm_ht_just_insert_please(&dev->map_hash, &list->hash,
-				      (unsigned long)map->handle,
-				      32 - PAGE_SHIFT - 3, 0,
-				      DRM_MAP_HASH_OFFSET >> PAGE_SHIFT)) {
+	list->file_offset_node = drm_mm_search_free(&dev->offset_manager,
+						    ttm->num_pages,
+						    0,0);
+	if (!list->file_offset_node) {
+		drm_ttm_object_remove(dev, object);
+		return -ENOMEM;
+	}
+	list->file_offset_node = drm_mm_get_block(list->file_offset_node,
+						  ttm->num_pages,0);
+
+	list->hash.key = list->file_offset_node->start;
+
+	if (drm_ht_insert_item(&dev->map_hash, &list->hash)) {
 		drm_ttm_object_remove(dev, object);
 		return -ENOMEM;
 	}
 
-	list->user_token = list->hash.key << PAGE_SHIFT;
+	list->user_token = ((drm_u64_t) list->hash.key) << PAGE_SHIFT;
 
 	atomic_set(&object->usage, 1);
 	*ttm_object = object;