1 /* $NetBSD: int_bus_dma.c,v 1.19 2023/12/20 13:55:17 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * PCI DMA support for the ARM Integrator.
40 */
41
42 #define _ARM32_BUS_DMA_PRIVATE
43
44 #include <sys/cdefs.h>
45 __KERNEL_RCSID(0, "$NetBSD: int_bus_dma.c,v 1.19 2023/12/20 13:55:17 thorpej Exp $");
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/device.h>
50 #include <sys/mbuf.h>
51
52 #include <uvm/uvm_extern.h>
53
54 #include <machine/bootconfig.h>
55
56 #include <evbarm/integrator/int_bus_dma.h>
57
58 #undef DEBUG
59 #define DEBUG(x)
60
61 static struct arm32_dma_range integrator_dma_ranges[DRAM_BLOCKS];
62
63 extern BootConfig bootconfig;
64
65 void
integrator_pci_dma_init(bus_dma_tag_t dmat)66 integrator_pci_dma_init(bus_dma_tag_t dmat)
67 {
68 struct arm32_dma_range *dr = integrator_dma_ranges;
69 int i;
70 int nranges = 0;
71
72 for (i = 0; i < bootconfig.dramblocks; i++) {
73 if (bootconfig.dram[i].flags & BOOT_DRAM_CAN_DMA) {
74 dr[nranges].dr_sysbase = bootconfig.dram[i].address;
75 dr[nranges].dr_busbase =
76 LOCAL_TO_CM_ALIAS(dr[nranges].dr_sysbase);
77 dr[nranges].dr_len = bootconfig.dram[i].pages * NBPG;
78 nranges++;
79 }
80 }
81
82 if (nranges == 0)
83 panic ("integrator_pci_dma_init: No DMA capable memory");
84
85 dmat->_ranges = dr;
86 dmat->_nranges = nranges;
87
88 dmat->_dmamap_create = _bus_dmamap_create;
89 dmat->_dmamap_destroy = _bus_dmamap_destroy;
90 dmat->_dmamap_load = _bus_dmamap_load;
91 dmat->_dmamap_load_mbuf = _bus_dmamap_load_mbuf;
92 dmat->_dmamap_load_uio = _bus_dmamap_load_uio;
93 dmat->_dmamap_load_raw = _bus_dmamap_load_raw;
94 dmat->_dmamap_unload = _bus_dmamap_unload;
95 dmat->_dmamap_sync_pre = _bus_dmamap_sync;
96 dmat->_dmamap_sync_post = _bus_dmamap_sync;
97
98 dmat->_dmamem_alloc = _bus_dmamem_alloc;
99 dmat->_dmamem_free = _bus_dmamem_free;
100 dmat->_dmamem_map = _bus_dmamem_map;
101 dmat->_dmamem_unmap = _bus_dmamem_unmap;
102 dmat->_dmamem_mmap = _bus_dmamem_mmap;
103
104 dmat->_dmatag_subregion = _bus_dmatag_subregion;
105 dmat->_dmatag_destroy = _bus_dmatag_destroy;
106 }
107