1 /*-
2 * Copyright (c) 2018 Microsemi Corporation.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /* $FreeBSD$ */
28
29 #include "smartpqi_includes.h"
30
31 MALLOC_DEFINE(M_SMARTRAID, "smartraidbuf", "Buffers for the smartraid driver");
32
33 /*
34 * DMA map load callback function
35 */
36 static void
os_dma_map(void * arg,bus_dma_segment_t * segs,int nseg,int error)37 os_dma_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
38 {
39 bus_addr_t *paddr = (bus_addr_t *)arg;
40 *paddr = segs[0].ds_addr;
41 }
42
43 /*
44 * DMA mem resource allocation wrapper function
45 */
os_dma_mem_alloc(pqisrc_softstate_t * softs,struct dma_mem * dma_mem)46 int os_dma_mem_alloc(pqisrc_softstate_t *softs, struct dma_mem *dma_mem)
47 {
48 int ret = 0;
49
50 /* DBG_FUNC("IN\n"); */
51
52 /* DMA memory needed - allocate it */
53 if ((ret = bus_dma_tag_create(
54 softs->os_specific.pqi_parent_dmat, /* parent */
55 dma_mem->align, 0, /* algnmnt, boundary */
56 BUS_SPACE_MAXADDR, /* lowaddr */
57 BUS_SPACE_MAXADDR, /* highaddr */
58 NULL, NULL, /* filter, filterarg */
59 dma_mem->size, /* maxsize */
60 1, /* nsegments */
61 dma_mem->size, /* maxsegsize */
62 0, /* flags */
63 NULL, NULL, /* No locking needed */
64 &dma_mem->dma_tag)) != 0 ) {
65 DBG_ERR("can't allocate DMA tag with error = 0x%x\n", ret);
66 goto err_out;
67 }
68 if ((ret = bus_dmamem_alloc(dma_mem->dma_tag, (void **)&dma_mem->virt_addr,
69 BUS_DMA_NOWAIT, &dma_mem->dma_map)) != 0) {
70 DBG_ERR("can't allocate DMA memory for required object \
71 with error = 0x%x\n", ret);
72 goto err_mem;
73 }
74
75 if((ret = bus_dmamap_load(dma_mem->dma_tag, dma_mem->dma_map,
76 dma_mem->virt_addr, dma_mem->size,
77 os_dma_map, &dma_mem->dma_addr, 0)) != 0) {
78 DBG_ERR("can't load DMA memory for required \
79 object with error = 0x%x\n", ret);
80 goto err_load;
81 }
82
83 memset(dma_mem->virt_addr, 0, dma_mem->size);
84
85 /* DBG_FUNC("OUT\n"); */
86 return ret;
87
88 err_load:
89 if(dma_mem->virt_addr)
90 bus_dmamem_free(dma_mem->dma_tag, dma_mem->virt_addr,
91 dma_mem->dma_map);
92 err_mem:
93 if(dma_mem->dma_tag)
94 bus_dma_tag_destroy(dma_mem->dma_tag);
95 err_out:
96 DBG_FUNC("failed OUT\n");
97 return ret;
98 }
99
100 /*
101 * DMA mem resource deallocation wrapper function
102 */
os_dma_mem_free(pqisrc_softstate_t * softs,struct dma_mem * dma_mem)103 void os_dma_mem_free(pqisrc_softstate_t *softs, struct dma_mem *dma_mem)
104 {
105 /* DBG_FUNC("IN\n"); */
106
107 if(dma_mem->dma_addr) {
108 bus_dmamap_unload(dma_mem->dma_tag, dma_mem->dma_map);
109 dma_mem->dma_addr = 0;
110 }
111
112 if(dma_mem->virt_addr) {
113 bus_dmamem_free(dma_mem->dma_tag, dma_mem->virt_addr,
114 dma_mem->dma_map);
115 dma_mem->virt_addr = NULL;
116 }
117
118 if(dma_mem->dma_tag) {
119 bus_dma_tag_destroy(dma_mem->dma_tag);
120 dma_mem->dma_tag = NULL;
121 }
122
123 /* DBG_FUNC("OUT\n"); */
124 }
125
126
127 /*
128 * Mem resource allocation wrapper function
129 */
os_mem_alloc(pqisrc_softstate_t * softs,size_t size)130 void *os_mem_alloc(pqisrc_softstate_t *softs, size_t size)
131 {
132 void *addr = NULL;
133
134 /* DBG_FUNC("IN\n"); */
135
136 addr = malloc((unsigned long)size, M_SMARTRAID,
137 M_NOWAIT | M_ZERO);
138
139 /* DBG_FUNC("OUT\n"); */
140
141 return addr;
142 }
143
144 /*
145 * Mem resource deallocation wrapper function
146 */
os_mem_free(pqisrc_softstate_t * softs,char * addr,size_t size)147 void os_mem_free(pqisrc_softstate_t *softs,
148 char *addr, size_t size)
149 {
150 /* DBG_FUNC("IN\n"); */
151
152 free((void*)addr, M_SMARTRAID);
153
154 /* DBG_FUNC("OUT\n"); */
155 }
156
157 /*
158 * dma/bus resource deallocation wrapper function
159 */
os_resource_free(pqisrc_softstate_t * softs)160 void os_resource_free(pqisrc_softstate_t *softs)
161 {
162 if(softs->os_specific.pqi_parent_dmat)
163 bus_dma_tag_destroy(softs->os_specific.pqi_parent_dmat);
164
165 if (softs->os_specific.pqi_regs_res0 != NULL)
166 bus_release_resource(softs->os_specific.pqi_dev,
167 SYS_RES_MEMORY,
168 softs->os_specific.pqi_regs_rid0,
169 softs->os_specific.pqi_regs_res0);
170 }
171