xref: /illumos-gate/usr/src/uts/common/io/sfxge/sfxge_sram.c (revision 49ef7e0638c8b771d8a136eae78b1c0f99acc8e0)
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
sfxge_sram_init(sfxge_t * sp)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
sfxge_sram_buf_tbl_alloc(sfxge_t * sp,size_t n,uint32_t * idp)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
sfxge_sram_start(sfxge_t * sp)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
sfxge_sram_buf_tbl_set(sfxge_t * sp,uint32_t id,efsys_mem_t * esmp,size_t n)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
sfxge_sram_buf_tbl_clear(sfxge_t * sp,uint32_t id,size_t n)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
sfxge_sram_stop(sfxge_t * sp)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
sfxge_sram_buf_tbl_free(sfxge_t * sp,uint32_t id,size_t n)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
sfxge_sram_fini(sfxge_t * sp)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 }
188