2 * Copyright (c) 2016 Sascha Wildner <saw@online.de>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <linux/dma-mapping.h>
29 #include <vm/vm_extern.h>
32 dma_alloc_coherent(struct device
*dev
, size_t size
, dma_addr_t
*dma_handle
,
39 #if 0 /* XXX swildner */
41 high
= *dev
->dma_mask
;
44 high
= BUS_SPACE_MAXADDR_32BIT
;
45 align
= PAGE_SIZE
<< get_order(size
);
46 mem
= (void *)kmem_alloc_contig(size
, 0, high
, align
);
48 *dma_handle
= vtophys(mem
);
55 dma_free_coherent(struct device
*dev
, size_t size
, void *cpu_addr
,
56 dma_addr_t dma_handle
)
59 kmem_free(kernel_map
, (vm_offset_t
)cpu_addr
, size
);