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
37void
38sfxge_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
55int
56sfxge_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
75fail1:
76	DTRACE_PROBE1(fail1, int, rc);
77
78	mutex_exit(&(ssp->ss_lock));
79
80	return (rc);
81}
82
83int
84sfxge_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
100int
101sfxge_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
120fail1:
121	DTRACE_PROBE1(fail1, int, rc);
122
123	mutex_exit(&(ssp->ss_lock));
124
125	return (rc);
126}
127
128void
129sfxge_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
145void
146sfxge_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
160void
161sfxge_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
174void
175sfxge_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}
188