kernel/arch/mips/netlogic/xlr/fmn-config.c

   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
  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
  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  */
 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  */
 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  */
 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 }