1 /*
2 * Copyright (c) 2008-2015 Solarflare Communications Inc.
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 are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
24 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * The views and conclusions contained in the software and documentation are
27 * those of the authors and should not be interpreted as representing official
28 * policies, either expressed or implied, of the FreeBSD Project.
29 */
30
31 #include <sys/types.h>
32 #include <sys/ddi.h>
33 #include <sys/sunddi.h>
34
35 #include "sfxge.h"
36
37 void
38 sfxge_sram_init(sfxge_t *sp)
39 {
40 sfxge_sram_t *ssp = &(sp->s_sram);
41 dev_info_t *dip = sp->s_dip;
42 char name[MAXNAMELEN];
43
44 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_UNINITIALIZED);
45
46 mutex_init(&(ssp->ss_lock), NULL, MUTEX_DRIVER, NULL);
47
48 (void) snprintf(name, MAXNAMELEN - 1, "%s%d_sram", ddi_driver_name(dip),
49 ddi_get_instance(dip));
50 ssp->ss_buf_tbl_ids = id_space_create(name, 1, EFX_BUF_TBL_SIZE);
51 ssp->ss_state = SFXGE_SRAM_INITIALIZED;
52 }
53
54 int
55 sfxge_sram_buf_tbl_alloc(sfxge_t *sp, size_t n, uint32_t *idp)
56 {
57 sfxge_sram_t *ssp = &(sp->s_sram);
58 id_t id;
59 int rc;
60
61 mutex_enter(&(ssp->ss_lock));
62
63 ASSERT(ssp->ss_state != SFXGE_SRAM_UNINITIALIZED);
64
65 if ((id = id_alloc_nosleep(ssp->ss_buf_tbl_ids)) < 0) {
66 rc = ENOSPC;
67 goto fail1;
68 }
69 *idp = (uint32_t)id;
70 mutex_exit(&(ssp->ss_lock));
71
72 return (0);
73
74 fail1:
75 DTRACE_PROBE1(fail1, int, rc);
76
77 mutex_exit(&(ssp->ss_lock));
78
79 return (rc);
80 }
81
82 int
83 sfxge_sram_start(sfxge_t *sp)
84 {
85 sfxge_sram_t *ssp = &(sp->s_sram);
86
87 mutex_enter(&(ssp->ss_lock));
88
89 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_INITIALIZED);
90 ASSERT3U(ssp->ss_count, ==, 0);
91
92 ssp->ss_state = SFXGE_SRAM_STARTED;
93
94 mutex_exit(&(ssp->ss_lock));
95
96 return (0);
97 }
98
99 int
100 sfxge_sram_buf_tbl_set(sfxge_t *sp, uint32_t id, efsys_mem_t *esmp,
101 size_t n)
102 {
103 sfxge_sram_t *ssp = &(sp->s_sram);
104 int rc;
105
106 mutex_enter(&(ssp->ss_lock));
107
108 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
109
110 if ((rc = efx_sram_buf_tbl_set(sp->s_enp, id, esmp, n)) != 0)
111 goto fail1;
112
113 ssp->ss_count += n;
114
115 mutex_exit(&(ssp->ss_lock));
116
117 return (0);
118
119 fail1:
120 DTRACE_PROBE1(fail1, int, rc);
121
122 mutex_exit(&(ssp->ss_lock));
123
124 return (rc);
125 }
126
127 void
128 sfxge_sram_buf_tbl_clear(sfxge_t *sp, uint32_t id, size_t n)
129 {
130 sfxge_sram_t *ssp = &(sp->s_sram);
131
132 mutex_enter(&(ssp->ss_lock));
133
134 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
135
136 ASSERT3U(ssp->ss_count, >=, n);
137 ssp->ss_count -= n;
138
139 efx_sram_buf_tbl_clear(sp->s_enp, id, n);
140
141 mutex_exit(&(ssp->ss_lock));
142 }
143
144 void
145 sfxge_sram_stop(sfxge_t *sp)
146 {
147 sfxge_sram_t *ssp = &(sp->s_sram);
148
149 mutex_enter(&(ssp->ss_lock));
150
151 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
152 ASSERT3U(ssp->ss_count, ==, 0);
153
154 ssp->ss_state = SFXGE_SRAM_INITIALIZED;
155
156 mutex_exit(&(ssp->ss_lock));
157 }
158
159 void
160 sfxge_sram_buf_tbl_free(sfxge_t *sp, uint32_t id, size_t n)
161 {
162 sfxge_sram_t *ssp = &(sp->s_sram);
163
164 mutex_enter(&(ssp->ss_lock));
165
166 ASSERT(ssp->ss_state != SFXGE_SRAM_UNINITIALIZED);
167
168 id_free(ssp->ss_buf_tbl_ids, (id_t)id);
169
170 mutex_exit(&(ssp->ss_lock));
171 }
172
173 void
174 sfxge_sram_fini(sfxge_t *sp)
175 {
176 sfxge_sram_t *ssp = &(sp->s_sram);
177
178 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_INITIALIZED);
179
180 id_space_destroy(ssp->ss_buf_tbl_ids);
181 ssp->ss_buf_tbl_ids = NULL;
182
183 mutex_destroy(&(ssp->ss_lock));
184
185 ssp->ss_state = SFXGE_SRAM_UNINITIALIZED;
186 }