1/*
2 * Copyright 2017, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the GNU General Public License version 2. Note that NO WARRANTY is provided.
8 * See "LICENSE_GPLv2.txt" for details.
9 *
10 * @TAG(DATA61_GPL)
11 */
12
13#include <ethdrivers/helpers.h>
14
15dma_addr_t
16dma_alloc_pin(ps_dma_man_t *dma_man, size_t size, int cached, int alignment)
17{
18    void *virt = ps_dma_alloc(dma_man, size, alignment, cached, PS_MEM_NORMAL);
19    if (!virt) {
20        return (dma_addr_t) {0, 0};
21    }
22    uintptr_t phys = ps_dma_pin(dma_man, virt, size);
23    if (!phys) {
24        /* hmm this shouldn't really happen */
25        ps_dma_free(dma_man, virt, size);
26        return (dma_addr_t) {0, 0};
27    }
28    if (!cached) {
29        /* Prevent any cache bombs */
30        ps_dma_cache_clean_invalidate(dma_man, virt, size);
31    }
32    return (dma_addr_t) {.virt = virt, .phys = phys};
33}
34
35void
36dma_unpin_free(ps_dma_man_t *dma_man, void *virt, size_t size)
37{
38    ps_dma_unpin(dma_man, virt, size);
39    ps_dma_free(dma_man, virt, size);
40}
41