1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright © 2003-2011 Emulex. All rights reserved. */
/*
* Source file containing the implementation of Driver buffer management
* and related helper functions
*/
#include <oce_impl.h>
static ddi_dma_attr_t oce_dma_buf_attr = {
DMA_ATTR_V0, /* version number */
0x0000000000000000ull, /* low address */
0xFFFFFFFFFFFFFFFFull, /* high address */
0x00000000FFFFFFFFull, /* dma counter max */
OCE_DMA_ALIGNMENT, /* alignment */
0x00000FFF, /* burst sizes */
0x00000001, /* minimum transfer size */
0x00000000FFFFFFFFull, /* maximum transfer size */
0xFFFFFFFFFFFFFFFFull, /* maximum segment size */
1, /* scatter/gather list length */
0x00000001, /* granularity */
0 /* DMA flags */
};
static ddi_device_acc_attr_t oce_dma_buf_accattr = {
DDI_DEVICE_ATTR_V0,
DDI_NEVERSWAP_ACC,
DDI_STRICTORDER_ACC,
};
/*
* function to allocate a dma buffer for mapping memory va-pa
*
* dev - software handle to device
* size - size of the memory to map
* flags - DDI_DMA_CONSISTENT/DDI_DMA_STREAMING
*
* return pointer to a oce_dma_buf_t structure handling the map
* NULL => failure
*/
oce_dma_buf_t *
oce_alloc_dma_buffer(struct oce_dev *dev,
uint32_t size, ddi_dma_attr_t *dma_attr, uint32_t flags)
{
oce_dma_buf_t *dbuf;
ddi_dma_cookie_t cookie;
uint32_t count;
size_t actual_len;
int ret = 0;
ASSERT(size > 0);
/* if NULL use default */
if (dma_attr == NULL) {
dma_attr = &oce_dma_buf_attr;
}
dbuf = kmem_zalloc(sizeof (oce_dma_buf_t), KM_NOSLEEP);
if (dbuf == NULL) {
return (NULL);
}
/* allocate dma handle */
ret = ddi_dma_alloc_handle(dev->dip, dma_attr,
DDI_DMA_DONTWAIT, NULL, &dbuf->dma_handle);
if (ret != DDI_SUCCESS) {
oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
"Failed to allocate DMA handle");
goto handle_fail;
}
/* allocate the DMA-able memory */
ret = ddi_dma_mem_alloc(dbuf->dma_handle, size, &oce_dma_buf_accattr,
flags, DDI_DMA_DONTWAIT, NULL, &dbuf->base,
&actual_len, &dbuf->acc_handle);
if (ret != DDI_SUCCESS) {
oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
"Failed to allocate DMA memory");
goto alloc_fail;
}
/* bind handle */
ret = ddi_dma_addr_bind_handle(dbuf->dma_handle,
(struct as *)0, dbuf->base, actual_len,
DDI_DMA_RDWR | flags,
DDI_DMA_DONTWAIT, NULL, &cookie, &count);
if (ret != DDI_DMA_MAPPED) {
oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
"Failed to bind dma handle");
goto bind_fail;
}
bzero(dbuf->base, actual_len);
dbuf->addr = cookie.dmac_laddress;
dbuf->size = actual_len;
/* usable length */
dbuf->len = size;
dbuf->num_pages = OCE_NUM_PAGES(size);
return (dbuf);
bind_fail:
ddi_dma_mem_free(&dbuf->acc_handle);
alloc_fail:
ddi_dma_free_handle(&dbuf->dma_handle);
handle_fail:
kmem_free(dbuf, sizeof (oce_dma_buf_t));
return (NULL);
} /* oce_dma_alloc_buffer */
/*
* function to delete a dma buffer
*
* dev - software handle to device
* dbuf - dma obj to delete
*
* return none
*/
void
oce_free_dma_buffer(struct oce_dev *dev, oce_dma_buf_t *dbuf)
{
_NOTE(ARGUNUSED(dev));
if (dbuf == NULL) {
return;
}
if (dbuf->dma_handle != NULL) {
(void) ddi_dma_unbind_handle(dbuf->dma_handle);
}
if (dbuf->acc_handle != NULL) {
ddi_dma_mem_free(&dbuf->acc_handle);
}
if (dbuf->dma_handle != NULL) {
ddi_dma_free_handle(&dbuf->dma_handle);
}
kmem_free(dbuf, sizeof (oce_dma_buf_t));
} /* oce_free_dma_buffer */
/*
* function to create a ring buffer
*
* dev - software handle to the device
* num_items - number of items in the ring
* item_size - size of an individual item in the ring
* flags - DDI_DMA_CONSISTENT/DDI_DMA_STREAMING for ring memory
*
* return pointer to a ring_buffer structure, NULL on failure
*/
oce_ring_buffer_t *
create_ring_buffer(struct oce_dev *dev,
uint32_t num_items, uint32_t item_size, uint32_t flags)
{
oce_ring_buffer_t *ring;
uint32_t size;
/* allocate the ring buffer */
ring = kmem_zalloc(sizeof (oce_ring_buffer_t), KM_NOSLEEP);
if (ring == NULL) {
return (NULL);
}
/* get the dbuf defining the ring */
size = num_items * item_size;
ring->dbuf = oce_alloc_dma_buffer(dev, size, NULL, flags);
if (ring->dbuf == NULL) {
oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
"Ring buffer allocation failed");
goto dbuf_fail;
}
/* fill the rest of the ring */
ring->num_items = num_items;
ring->item_size = item_size;
ring->num_used = 0;
return (ring);
dbuf_fail:
kmem_free(ring, sizeof (oce_ring_buffer_t));
return (NULL);
} /* create_ring_buffer */
/*
* function to destroy a ring buffer
*
* dev - software handle to teh device
* ring - the ring buffer to delete
*
* return none
*/
void
destroy_ring_buffer(struct oce_dev *dev, oce_ring_buffer_t *ring)
{
ASSERT(dev != NULL);
ASSERT(ring != NULL);
/* free the dbuf associated with the ring */
oce_free_dma_buffer(dev, ring->dbuf);
ring->dbuf = NULL;
/* free the ring itself */
kmem_free(ring, sizeof (oce_ring_buffer_t));
} /* destroy_ring_buffer */
/*
* function to enable the fma flags
* fm_caps - FM capability flags
*
* return none
*/
void
oce_set_dma_fma_flags(int fm_caps)
{
if (fm_caps == DDI_FM_NOT_CAPABLE) {
return;
}
oce_dma_buf_accattr.devacc_attr_access = DDI_DEFAULT_ACC;
if (DDI_FM_DMA_ERR_CAP(fm_caps)) {
oce_dma_buf_attr.dma_attr_flags |= DDI_DMA_FLAGERR;
} else {
oce_dma_buf_attr.dma_attr_flags &= ~DDI_DMA_FLAGERR;
}
} /* oce_set_dma_fma_flags */
|
