1 /*
2 * Copyright (c) 2008-2016 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_map = rmallocmap_wait(EFX_BUF_TBL_SIZE);
51 rmfree(ssp->ss_buf_tbl_map, EFX_BUF_TBL_SIZE - 1, 1);
52 ssp->ss_state = SFXGE_SRAM_INITIALIZED;
53 }
54
55 int
56 sfxge_sram_buf_tbl_alloc(sfxge_t *sp, size_t n, uint32_t *idp)
57 {
58 sfxge_sram_t *ssp = &(sp->s_sram);
59 unsigned long id;
60 int rc;
61
62 mutex_enter(&(ssp->ss_lock));
63
64 ASSERT(ssp->ss_state != SFXGE_SRAM_UNINITIALIZED);
65
66 if ((id = rmalloc(ssp->ss_buf_tbl_map, n)) == 0) {
67 rc = ENOSPC;
68 goto fail1;
69 }
70 *idp = (uint32_t)id - 1;
71 mutex_exit(&(ssp->ss_lock));
72
73 return (0);
74
75 fail1:
76 DTRACE_PROBE1(fail1, int, rc);
77
78 mutex_exit(&(ssp->ss_lock));
79
80 return (rc);
81 }
82
83 int
84 sfxge_sram_start(sfxge_t *sp)
85 {
86 sfxge_sram_t *ssp = &(sp->s_sram);
87
88 mutex_enter(&(ssp->ss_lock));
89
90 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_INITIALIZED);
91 ASSERT3U(ssp->ss_count, ==, 0);
92
93 ssp->ss_state = SFXGE_SRAM_STARTED;
94
95 mutex_exit(&(ssp->ss_lock));
96
97 return (0);
98 }
99
100 int
101 sfxge_sram_buf_tbl_set(sfxge_t *sp, uint32_t id, efsys_mem_t *esmp,
102 size_t n)
103 {
104 sfxge_sram_t *ssp = &(sp->s_sram);
105 int rc;
106
107 mutex_enter(&(ssp->ss_lock));
108
109 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
110
111 if ((rc = efx_sram_buf_tbl_set(sp->s_enp, id, esmp, n)) != 0)
112 goto fail1;
113
114 ssp->ss_count += n;
115
116 mutex_exit(&(ssp->ss_lock));
117
118 return (0);
119
120 fail1:
121 DTRACE_PROBE1(fail1, int, rc);
122
123 mutex_exit(&(ssp->ss_lock));
124
125 return (rc);
126 }
127
128 void
129 sfxge_sram_buf_tbl_clear(sfxge_t *sp, uint32_t id, size_t n)
130 {
131 sfxge_sram_t *ssp = &(sp->s_sram);
132
133 mutex_enter(&(ssp->ss_lock));
134
135 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
136
137 ASSERT3U(ssp->ss_count, >=, n);
138 ssp->ss_count -= n;
139
140 efx_sram_buf_tbl_clear(sp->s_enp, id, n);
141
142 mutex_exit(&(ssp->ss_lock));
143 }
144
145 void
146 sfxge_sram_stop(sfxge_t *sp)
147 {
148 sfxge_sram_t *ssp = &(sp->s_sram);
149
150 mutex_enter(&(ssp->ss_lock));
151
152 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_STARTED);
153 ASSERT3U(ssp->ss_count, ==, 0);
154
155 ssp->ss_state = SFXGE_SRAM_INITIALIZED;
156
157 mutex_exit(&(ssp->ss_lock));
158 }
159
160 void
161 sfxge_sram_buf_tbl_free(sfxge_t *sp, uint32_t id, size_t n)
162 {
163 sfxge_sram_t *ssp = &(sp->s_sram);
164
165 mutex_enter(&(ssp->ss_lock));
166
167 ASSERT(ssp->ss_state != SFXGE_SRAM_UNINITIALIZED);
168
169 rmfree(ssp->ss_buf_tbl_map, n, (unsigned long)id + 1);
170
171 mutex_exit(&(ssp->ss_lock));
172 }
173
174 void
175 sfxge_sram_fini(sfxge_t *sp)
176 {
177 sfxge_sram_t *ssp = &(sp->s_sram);
178
179 ASSERT3U(ssp->ss_state, ==, SFXGE_SRAM_INITIALIZED);
180
181 rmfreemap(ssp->ss_buf_tbl_map);
182 ssp->ss_buf_tbl_map = NULL;
183
184 mutex_destroy(&(ssp->ss_lock));
185
186 ssp->ss_state = SFXGE_SRAM_UNINITIALIZED;
187 }