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Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/dmapool.h')
-rw-r--r--sys/compat/linuxkpi/common/include/linux/dmapool.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/dmapool.h b/sys/compat/linuxkpi/common/include/linux/dmapool.h
new file mode 100644
index 000000000000..3ea2d5b0a491
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/dmapool.h
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice unmodified, this list of conditions, and the following
+ * disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef _LINUX_DMAPOOL_H_
+#define _LINUX_DMAPOOL_H_
+
+#include <linux/types.h>
+#include <linux/io.h>
+#include <linux/scatterlist.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+struct dma_pool {
+ uma_zone_t pool_zone;
+};
+
+static inline struct dma_pool *
+dma_pool_create(char *name, struct device *dev, size_t size,
+ size_t align, size_t boundary)
+{
+ struct dma_pool *pool;
+
+ pool = kmalloc(sizeof(*pool), GFP_KERNEL);
+ align--;
+ /*
+ * XXX Eventually this could use a seperate allocf to honor boundary
+ * and physical address requirements of the device.
+ */
+ pool->pool_zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL,
+ align, UMA_ZONE_OFFPAGE|UMA_ZONE_HASH);
+
+ return (pool);
+}
+
+static inline void
+dma_pool_destroy(struct dma_pool *pool)
+{
+ uma_zdestroy(pool->pool_zone);
+ kfree(pool);
+}
+
+static inline void *
+dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
+{
+ void *vaddr;
+
+ vaddr = uma_zalloc(pool->pool_zone, mem_flags);
+ if (vaddr)
+ *handle = vtophys(vaddr);
+ return (vaddr);
+}
+
+static inline void
+dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr)
+{
+ uma_zfree(pool->pool_zone, vaddr);
+}
+
+
+#endif /* _LINUX_DMAPOOL_H_ */