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authorDean Nelson <dcn@sgi.com>2008-04-25 15:22:19 -0500
committerTony Luck <tony.luck@intel.com>2008-04-29 13:49:01 -0700
commite4a064dfa2b242519a9f06f9a1e58c27bf0c371b (patch)
tree671214b5b256e4b397ce321346d58a551845fe68 /arch/ia64/kernel/uncached.c
parente617fce64e5faea149fcf3bffc1b42e4ba29e7e5 (diff)
[IA64] allocate multiple contiguous pages via uncached allocator
Enable the uncached allocator to allocate multiple pages of contiguous uncached memory. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/uncached.c')
-rw-r--r--arch/ia64/kernel/uncached.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index 2a90c32024f4..e77995a6e3ed 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2001-2006 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2001-2008 Silicon Graphics, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
@@ -177,12 +177,13 @@ failed:
* uncached_alloc_page
*
* @starting_nid: node id of node to start with, or -1
+ * @n_pages: number of contiguous pages to allocate
*
- * Allocate 1 uncached page. Allocates on the requested node. If no
- * uncached pages are available on the requested node, roundrobin starting
- * with the next higher node.
+ * Allocate the specified number of contiguous uncached pages on the
+ * the requested node. If not enough contiguous uncached pages are available
+ * on the requested node, roundrobin starting with the next higher node.
*/
-unsigned long uncached_alloc_page(int starting_nid)
+unsigned long uncached_alloc_page(int starting_nid, int n_pages)
{
unsigned long uc_addr;
struct uncached_pool *uc_pool;
@@ -202,7 +203,8 @@ unsigned long uncached_alloc_page(int starting_nid)
if (uc_pool->pool == NULL)
continue;
do {
- uc_addr = gen_pool_alloc(uc_pool->pool, PAGE_SIZE);
+ uc_addr = gen_pool_alloc(uc_pool->pool,
+ n_pages * PAGE_SIZE);
if (uc_addr != 0)
return uc_addr;
} while (uncached_add_chunk(uc_pool, nid) == 0);
@@ -217,11 +219,12 @@ EXPORT_SYMBOL(uncached_alloc_page);
/*
* uncached_free_page
*
- * @uc_addr: uncached address of page to free
+ * @uc_addr: uncached address of first page to free
+ * @n_pages: number of contiguous pages to free
*
- * Free a single uncached page.
+ * Free the specified number of uncached pages.
*/
-void uncached_free_page(unsigned long uc_addr)
+void uncached_free_page(unsigned long uc_addr, int n_pages)
{
int nid = paddr_to_nid(uc_addr - __IA64_UNCACHED_OFFSET);
struct gen_pool *pool = uncached_pools[nid].pool;
@@ -232,7 +235,7 @@ void uncached_free_page(unsigned long uc_addr)
if ((uc_addr & (0XFUL << 60)) != __IA64_UNCACHED_OFFSET)
panic("uncached_free_page invalid address %lx\n", uc_addr);
- gen_pool_free(pool, uc_addr, PAGE_SIZE);
+ gen_pool_free(pool, uc_addr, n_pages * PAGE_SIZE);
}
EXPORT_SYMBOL(uncached_free_page);