1 /*
2 * Copyright (c) 2003-2012 Broadcom Corporation
3 * All Rights Reserved
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the Broadcom
9 * license below:
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <asm/cpu-info.h>
36 #include <linux/irq.h>
37 #include <linux/interrupt.h>
38
39 #include <asm/cpu.h>
40 #include <asm/mipsregs.h>
41 #include <asm/netlogic/xlr/fmn.h>
42 #include <asm/netlogic/xlr/xlr.h>
43 #include <asm/netlogic/common.h>
44 #include <asm/netlogic/haldefs.h>
45
46 struct xlr_board_fmn_config xlr_board_fmn_config;
47
print_credit_config(struct xlr_fmn_info * fmn_info)48 static void __maybe_unused print_credit_config(struct xlr_fmn_info *fmn_info)
49 {
50 int bkt;
51
52 pr_info("Bucket size :\n");
53 pr_info("Station\t: Size\n");
54 for (bkt = 0; bkt < 16; bkt++)
55 pr_info(" %d %d %d %d %d %d %d %d\n",
56 xlr_board_fmn_config.bucket_size[(bkt * 8) + 0],
57 xlr_board_fmn_config.bucket_size[(bkt * 8) + 1],
58 xlr_board_fmn_config.bucket_size[(bkt * 8) + 2],
59 xlr_board_fmn_config.bucket_size[(bkt * 8) + 3],
60 xlr_board_fmn_config.bucket_size[(bkt * 8) + 4],
61 xlr_board_fmn_config.bucket_size[(bkt * 8) + 5],
62 xlr_board_fmn_config.bucket_size[(bkt * 8) + 6],
63 xlr_board_fmn_config.bucket_size[(bkt * 8) + 7]);
64 pr_info("\n");
65
66 pr_info("Credits distribution :\n");
67 pr_info("Station\t: Size\n");
68 for (bkt = 0; bkt < 16; bkt++)
69 pr_info(" %d %d %d %d %d %d %d %d\n",
70 fmn_info->credit_config[(bkt * 8) + 0],
71 fmn_info->credit_config[(bkt * 8) + 1],
72 fmn_info->credit_config[(bkt * 8) + 2],
73 fmn_info->credit_config[(bkt * 8) + 3],
74 fmn_info->credit_config[(bkt * 8) + 4],
75 fmn_info->credit_config[(bkt * 8) + 5],
76 fmn_info->credit_config[(bkt * 8) + 6],
77 fmn_info->credit_config[(bkt * 8) + 7]);
78 pr_info("\n");
79 }
80
check_credit_distribution(void)81 static void check_credit_distribution(void)
82 {
83 struct xlr_board_fmn_config *cfg = &xlr_board_fmn_config;
84 int bkt, n, total_credits, ncores;
85
86 ncores = hweight32(nlm_current_node()->coremask);
87 for (bkt = 0; bkt < 128; bkt++) {
88 total_credits = 0;
89 for (n = 0; n < ncores; n++)
90 total_credits += cfg->cpu[n].credit_config[bkt];
91 total_credits += cfg->gmac[0].credit_config[bkt];
92 total_credits += cfg->gmac[1].credit_config[bkt];
93 total_credits += cfg->dma.credit_config[bkt];
94 total_credits += cfg->cmp.credit_config[bkt];
95 total_credits += cfg->sae.credit_config[bkt];
96 total_credits += cfg->xgmac[0].credit_config[bkt];
97 total_credits += cfg->xgmac[1].credit_config[bkt];
98 if (total_credits > cfg->bucket_size[bkt])
99 pr_err("ERROR: Bucket %d: credits (%d) > size (%d)\n",
100 bkt, total_credits, cfg->bucket_size[bkt]);
101 }
102 pr_info("Credit distribution complete.\n");
103 }
104
105 /**
106 * Configure bucket size and credits for a device. 'size' is the size of
107 * the buckets for the device. This size is distributed among all the CPUs
108 * so that all of them can send messages to the device.
109 *
110 * The device is also given 'cpu_credits' to send messages to the CPUs
111 *
112 * @dev_info: FMN information structure for each devices
113 * @start_stn_id: Starting station id of dev_info
114 * @end_stn_id: End station id of dev_info
115 * @num_buckets: Total number of buckets for den_info
116 * @cpu_credits: Allowed credits to cpu for each devices pointing by dev_info
117 * @size: Size of the each buckets in the device station
118 */
setup_fmn_cc(struct xlr_fmn_info * dev_info,int start_stn_id,int end_stn_id,int num_buckets,int cpu_credits,int size)119 static void setup_fmn_cc(struct xlr_fmn_info *dev_info, int start_stn_id,
120 int end_stn_id, int num_buckets, int cpu_credits, int size)
121 {
122 int i, j, num_core, n, credits_per_cpu;
123 struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
124
125 num_core = hweight32(nlm_current_node()->coremask);
126 dev_info->num_buckets = num_buckets;
127 dev_info->start_stn_id = start_stn_id;
128 dev_info->end_stn_id = end_stn_id;
129
130 n = num_core;
131 if (num_core == 3)
132 n = 4;
133
134 for (i = start_stn_id; i <= end_stn_id; i++) {
135 xlr_board_fmn_config.bucket_size[i] = size;
136
137 /* Dividing device credits equally to cpus */
138 credits_per_cpu = size / n;
139 for (j = 0; j < num_core; j++)
140 cpu[j].credit_config[i] = credits_per_cpu;
141
142 /* credits left to distribute */
143 credits_per_cpu = size - (credits_per_cpu * num_core);
144
145 /* distribute the remaining credits (if any), among cores */
146 for (j = 0; (j < num_core) && (credits_per_cpu >= 4); j++) {
147 cpu[j].credit_config[i] += 4;
148 credits_per_cpu -= 4;
149 }
150 }
151
152 /* Distributing cpu per bucket credits to devices */
153 for (i = 0; i < num_core; i++) {
154 for (j = 0; j < FMN_CORE_NBUCKETS; j++)
155 dev_info->credit_config[(i * 8) + j] = cpu_credits;
156 }
157 }
158
159 /*
160 * Each core has 256 slots and 8 buckets,
161 * Configure the 8 buckets each with 32 slots
162 */
setup_cpu_fmninfo(struct xlr_fmn_info * cpu,int num_core)163 static void setup_cpu_fmninfo(struct xlr_fmn_info *cpu, int num_core)
164 {
165 int i, j;
166
167 for (i = 0; i < num_core; i++) {
168 cpu[i].start_stn_id = (8 * i);
169 cpu[i].end_stn_id = (8 * i + 8);
170
171 for (j = cpu[i].start_stn_id; j < cpu[i].end_stn_id; j++)
172 xlr_board_fmn_config.bucket_size[j] = 32;
173 }
174 }
175
176 /**
177 * Setup the FMN details for each devices according to the device available
178 * in each variant of XLR/XLS processor
179 */
xlr_board_info_setup(void)180 void xlr_board_info_setup(void)
181 {
182 struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
183 struct xlr_fmn_info *gmac = xlr_board_fmn_config.gmac;
184 struct xlr_fmn_info *xgmac = xlr_board_fmn_config.xgmac;
185 struct xlr_fmn_info *dma = &xlr_board_fmn_config.dma;
186 struct xlr_fmn_info *cmp = &xlr_board_fmn_config.cmp;
187 struct xlr_fmn_info *sae = &xlr_board_fmn_config.sae;
188 int processor_id, num_core;
189
190 num_core = hweight32(nlm_current_node()->coremask);
191 processor_id = read_c0_prid() & PRID_IMP_MASK;
192
193 setup_cpu_fmninfo(cpu, num_core);
194 switch (processor_id) {
195 case PRID_IMP_NETLOGIC_XLS104:
196 case PRID_IMP_NETLOGIC_XLS108:
197 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
198 FMN_STNID_GMAC0_TX3, 8, 16, 32);
199 setup_fmn_cc(dma, FMN_STNID_DMA_0,
200 FMN_STNID_DMA_3, 4, 8, 64);
201 setup_fmn_cc(sae, FMN_STNID_SEC0,
202 FMN_STNID_SEC1, 2, 8, 128);
203 break;
204
205 case PRID_IMP_NETLOGIC_XLS204:
206 case PRID_IMP_NETLOGIC_XLS208:
207 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
208 FMN_STNID_GMAC0_TX3, 8, 16, 32);
209 setup_fmn_cc(dma, FMN_STNID_DMA_0,
210 FMN_STNID_DMA_3, 4, 8, 64);
211 setup_fmn_cc(sae, FMN_STNID_SEC0,
212 FMN_STNID_SEC1, 2, 8, 128);
213 break;
214
215 case PRID_IMP_NETLOGIC_XLS404:
216 case PRID_IMP_NETLOGIC_XLS408:
217 case PRID_IMP_NETLOGIC_XLS404B:
218 case PRID_IMP_NETLOGIC_XLS408B:
219 case PRID_IMP_NETLOGIC_XLS416B:
220 case PRID_IMP_NETLOGIC_XLS608B:
221 case PRID_IMP_NETLOGIC_XLS616B:
222 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
223 FMN_STNID_GMAC0_TX3, 8, 8, 32);
224 setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
225 FMN_STNID_GMAC1_TX3, 8, 8, 32);
226 setup_fmn_cc(dma, FMN_STNID_DMA_0,
227 FMN_STNID_DMA_3, 4, 4, 64);
228 setup_fmn_cc(cmp, FMN_STNID_CMP_0,
229 FMN_STNID_CMP_3, 4, 4, 64);
230 setup_fmn_cc(sae, FMN_STNID_SEC0,
231 FMN_STNID_SEC1, 2, 8, 128);
232 break;
233
234 case PRID_IMP_NETLOGIC_XLS412B:
235 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
236 FMN_STNID_GMAC0_TX3, 8, 8, 32);
237 setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
238 FMN_STNID_GMAC1_TX3, 8, 8, 32);
239 setup_fmn_cc(dma, FMN_STNID_DMA_0,
240 FMN_STNID_DMA_3, 4, 4, 64);
241 setup_fmn_cc(cmp, FMN_STNID_CMP_0,
242 FMN_STNID_CMP_3, 4, 4, 64);
243 setup_fmn_cc(sae, FMN_STNID_SEC0,
244 FMN_STNID_SEC1, 2, 8, 128);
245 break;
246
247 case PRID_IMP_NETLOGIC_XLR308:
248 case PRID_IMP_NETLOGIC_XLR308C:
249 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
250 FMN_STNID_GMAC0_TX3, 8, 16, 32);
251 setup_fmn_cc(dma, FMN_STNID_DMA_0,
252 FMN_STNID_DMA_3, 4, 8, 64);
253 setup_fmn_cc(sae, FMN_STNID_SEC0,
254 FMN_STNID_SEC1, 2, 4, 128);
255 break;
256
257 case PRID_IMP_NETLOGIC_XLR532:
258 case PRID_IMP_NETLOGIC_XLR532C:
259 case PRID_IMP_NETLOGIC_XLR516C:
260 case PRID_IMP_NETLOGIC_XLR508C:
261 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
262 FMN_STNID_GMAC0_TX3, 8, 16, 32);
263 setup_fmn_cc(dma, FMN_STNID_DMA_0,
264 FMN_STNID_DMA_3, 4, 8, 64);
265 setup_fmn_cc(sae, FMN_STNID_SEC0,
266 FMN_STNID_SEC1, 2, 4, 128);
267 break;
268
269 case PRID_IMP_NETLOGIC_XLR732:
270 case PRID_IMP_NETLOGIC_XLR716:
271 setup_fmn_cc(&xgmac[0], FMN_STNID_XMAC0_00_TX,
272 FMN_STNID_XMAC0_15_TX, 8, 0, 32);
273 setup_fmn_cc(&xgmac[1], FMN_STNID_XMAC1_00_TX,
274 FMN_STNID_XMAC1_15_TX, 8, 0, 32);
275 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
276 FMN_STNID_GMAC0_TX3, 8, 24, 32);
277 setup_fmn_cc(dma, FMN_STNID_DMA_0,
278 FMN_STNID_DMA_3, 4, 4, 64);
279 setup_fmn_cc(sae, FMN_STNID_SEC0,
280 FMN_STNID_SEC1, 2, 4, 128);
281 break;
282 default:
283 pr_err("Unknown CPU with processor ID [%d]\n", processor_id);
284 pr_err("Error: Cannot initialize FMN credits.\n");
285 }
286
287 check_credit_distribution();
288
289 #if 0 /* debug */
290 print_credit_config(&cpu[0]);
291 print_credit_config(&gmac[0]);
292 #endif
293 }
294