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1/***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28/**
29 * @file
30 *
31 * Helper functions for FPA setup.
32 *
33 */
34#include "executive-config.h"
35#include "cvmx-config.h"
36#include "cvmx.h"
37#include "cvmx-bootmem.h"
38#include "cvmx-fpa.h"
39#include "cvmx-helper-fpa.h"
40
41/**
42 * Allocate memory for and initialize a single FPA pool.
43 *
44 * @pool: Pool to initialize
45 * @buffer_size: Size of buffers to allocate in bytes
46 * @buffers: Number of buffers to put in the pool. Zero is allowed
47 * @name: String name of the pool for debugging purposes
48 * Returns Zero on success, non-zero on failure
49 */
50static int __cvmx_helper_initialize_fpa_pool(int pool, uint64_t buffer_size,
51 uint64_t buffers, const char *name)
52{
53 uint64_t current_num;
54 void *memory;
55 uint64_t align = CVMX_CACHE_LINE_SIZE;
56
57 /*
58 * Align the allocation so that power of 2 size buffers are
59 * naturally aligned.
60 */
61 while (align < buffer_size)
62 align = align << 1;
63
64 if (buffers == 0)
65 return 0;
66
67 current_num = cvmx_read_csr(CVMX_FPA_QUEX_AVAILABLE(pool));
68 if (current_num) {
69 cvmx_dprintf("Fpa pool %d(%s) already has %llu buffers. "
70 "Skipping setup.\n",
71 pool, name, (unsigned long long)current_num);
72 return 0;
73 }
74
75 memory = cvmx_bootmem_alloc(buffer_size * buffers, align);
76 if (memory == NULL) {
77 cvmx_dprintf("Out of memory initializing fpa pool %d(%s).\n",
78 pool, name);
79 return -1;
80 }
81 cvmx_fpa_setup_pool(pool, name, memory, buffer_size, buffers);
82 return 0;
83}
84
85/**
86 * Allocate memory and initialize the FPA pools using memory
87 * from cvmx-bootmem. Specifying zero for the number of
88 * buffers will cause that FPA pool to not be setup. This is
89 * useful if you aren't using some of the hardware and want
90 * to save memory. Use cvmx_helper_initialize_fpa instead of
91 * this function directly.
92 *
93 * @pip_pool: Should always be CVMX_FPA_PACKET_POOL
94 * @pip_size: Should always be CVMX_FPA_PACKET_POOL_SIZE
95 * @pip_buffers:
96 * Number of packet buffers.
97 * @wqe_pool: Should always be CVMX_FPA_WQE_POOL
98 * @wqe_size: Should always be CVMX_FPA_WQE_POOL_SIZE
99 * @wqe_entries:
100 * Number of work queue entries
101 * @pko_pool: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL
102 * @pko_size: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE
103 * @pko_buffers:
104 * PKO Command buffers. You should at minimum have two per
105 * each PKO queue.
106 * @tim_pool: Should always be CVMX_FPA_TIMER_POOL
107 * @tim_size: Should always be CVMX_FPA_TIMER_POOL_SIZE
108 * @tim_buffers:
109 * TIM ring buffer command queues. At least two per timer bucket
110 * is recommened.
111 * @dfa_pool: Should always be CVMX_FPA_DFA_POOL
112 * @dfa_size: Should always be CVMX_FPA_DFA_POOL_SIZE
113 * @dfa_buffers:
114 * DFA command buffer. A relatively small (32 for example)
115 * number should work.
116 * Returns Zero on success, non-zero if out of memory
117 */
118static int __cvmx_helper_initialize_fpa(int pip_pool, int pip_size,
119 int pip_buffers, int wqe_pool,
120 int wqe_size, int wqe_entries,
121 int pko_pool, int pko_size,
122 int pko_buffers, int tim_pool,
123 int tim_size, int tim_buffers,
124 int dfa_pool, int dfa_size,
125 int dfa_buffers)
126{
127 int status;
128
129 cvmx_fpa_enable();
130
131 if ((pip_buffers > 0) && (pip_buffers <= 64))
132 cvmx_dprintf
133 ("Warning: %d packet buffers may not be enough for hardware"
134 " prefetch. 65 or more is recommended.\n", pip_buffers);
135
136 if (pip_pool >= 0) {
137 status =
138 __cvmx_helper_initialize_fpa_pool(pip_pool, pip_size,
139 pip_buffers,
140 "Packet Buffers");
141 if (status)
142 return status;
143 }
144
145 if (wqe_pool >= 0) {
146 status =
147 __cvmx_helper_initialize_fpa_pool(wqe_pool, wqe_size,
148 wqe_entries,
149 "Work Queue Entries");
150 if (status)
151 return status;
152 }
153
154 if (pko_pool >= 0) {
155 status =
156 __cvmx_helper_initialize_fpa_pool(pko_pool, pko_size,
157 pko_buffers,
158 "PKO Command Buffers");
159 if (status)
160 return status;
161 }
162
163 if (tim_pool >= 0) {
164 status =
165 __cvmx_helper_initialize_fpa_pool(tim_pool, tim_size,
166 tim_buffers,
167 "TIM Command Buffers");
168 if (status)
169 return status;
170 }
171
172 if (dfa_pool >= 0) {
173 status =
174 __cvmx_helper_initialize_fpa_pool(dfa_pool, dfa_size,
175 dfa_buffers,
176 "DFA Command Buffers");
177 if (status)
178 return status;
179 }
180
181 return 0;
182}
183
184/**
185 * Allocate memory and initialize the FPA pools using memory
186 * from cvmx-bootmem. Sizes of each element in the pools is
187 * controlled by the cvmx-config.h header file. Specifying
188 * zero for any parameter will cause that FPA pool to not be
189 * setup. This is useful if you aren't using some of the
190 * hardware and want to save memory.
191 *
192 * @packet_buffers:
193 * Number of packet buffers to allocate
194 * @work_queue_entries:
195 * Number of work queue entries
196 * @pko_buffers:
197 * PKO Command buffers. You should at minimum have two per
198 * each PKO queue.
199 * @tim_buffers:
200 * TIM ring buffer command queues. At least two per timer bucket
201 * is recommened.
202 * @dfa_buffers:
203 * DFA command buffer. A relatively small (32 for example)
204 * number should work.
205 * Returns Zero on success, non-zero if out of memory
206 */
207int cvmx_helper_initialize_fpa(int packet_buffers, int work_queue_entries,
208 int pko_buffers, int tim_buffers,
209 int dfa_buffers)
210{
211#ifndef CVMX_FPA_PACKET_POOL
212#define CVMX_FPA_PACKET_POOL -1
213#define CVMX_FPA_PACKET_POOL_SIZE 0
214#endif
215#ifndef CVMX_FPA_WQE_POOL
216#define CVMX_FPA_WQE_POOL -1
217#define CVMX_FPA_WQE_POOL_SIZE 0
218#endif
219#ifndef CVMX_FPA_OUTPUT_BUFFER_POOL
220#define CVMX_FPA_OUTPUT_BUFFER_POOL -1
221#define CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE 0
222#endif
223#ifndef CVMX_FPA_TIMER_POOL
224#define CVMX_FPA_TIMER_POOL -1
225#define CVMX_FPA_TIMER_POOL_SIZE 0
226#endif
227#ifndef CVMX_FPA_DFA_POOL
228#define CVMX_FPA_DFA_POOL -1
229#define CVMX_FPA_DFA_POOL_SIZE 0
230#endif
231 return __cvmx_helper_initialize_fpa(CVMX_FPA_PACKET_POOL,
232 CVMX_FPA_PACKET_POOL_SIZE,
233 packet_buffers, CVMX_FPA_WQE_POOL,
234 CVMX_FPA_WQE_POOL_SIZE,
235 work_queue_entries,
236 CVMX_FPA_OUTPUT_BUFFER_POOL,
237 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE,
238 pko_buffers, CVMX_FPA_TIMER_POOL,
239 CVMX_FPA_TIMER_POOL_SIZE,
240 tim_buffers, CVMX_FPA_DFA_POOL,
241 CVMX_FPA_DFA_POOL_SIZE,
242 dfa_buffers);
243}
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