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authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2011-05-24 17:13:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 08:39:54 -0700
commit3c8f370ded3483b27f1218ff0051fcf0c7a2facd (patch)
treeda0bcb089d586737ddf14e6d610ded5d3134e8d9 /include
parent6aae6e0304d33e537298867dafb2703ec58c2e4f (diff)
lib/genalloc.c: add support for specifying the physical address
So we can specify the virtual address as the base of the pool chunk and then get physical addresses for hardware IP. For example on at91 we will use this on spi, uart or macb Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Patrice VILCHEZ <patrice.vilchez@atmel.com> Cc: Jes Sorensen <jes@wildopensource.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/genalloc.h22
1 files changed, 21 insertions, 1 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h
index b1c70f10c42b..5bbebda78b02 100644
--- a/include/linux/genalloc.h
+++ b/include/linux/genalloc.h
@@ -26,13 +26,33 @@ struct gen_pool {
struct gen_pool_chunk {
spinlock_t lock;
struct list_head next_chunk; /* next chunk in pool */
+ phys_addr_t phys_addr; /* physical starting address of memory chunk */
unsigned long start_addr; /* starting address of memory chunk */
unsigned long end_addr; /* ending address of memory chunk */
unsigned long bits[0]; /* bitmap for allocating memory chunk */
};
extern struct gen_pool *gen_pool_create(int, int);
-extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
+extern phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long);
+extern int gen_pool_add_virt(struct gen_pool *, unsigned long, phys_addr_t,
+ size_t, int);
+/**
+ * gen_pool_add - add a new chunk of special memory to the pool
+ * @pool: pool to add new memory chunk to
+ * @addr: starting address of memory chunk to add to pool
+ * @size: size in bytes of the memory chunk to add to pool
+ * @nid: node id of the node the chunk structure and bitmap should be
+ * allocated on, or -1
+ *
+ * Add a new chunk of special memory to the specified pool.
+ *
+ * Returns 0 on success or a -ve errno on failure.
+ */
+static inline int gen_pool_add(struct gen_pool *pool, unsigned long addr,
+ size_t size, int nid)
+{
+ return gen_pool_add_virt(pool, addr, -1, size, nid);
+}
extern void gen_pool_destroy(struct gen_pool *);
extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);