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/mipsregs.h>
  40 #include <asm/netlogic/xlr/fmn.h>
  41 #include <asm/netlogic/xlr/xlr.h>
  42 #include <asm/netlogic/common.h>
  43 #include <asm/netlogic/haldefs.h>
  44
  45 struct xlr_board_fmn_config xlr_board_fmn_config;
  46
  47 static void __maybe_unused print_credit_config(struct xlr_fmn_info *fmn_info)
  48 {
  49         int bkt;
  50
  51         pr_info("Bucket size :\n");
  52         pr_info("Station\t: Size\n");
  53         for (bkt = 0; bkt < 16; bkt++)
  54                 pr_info(" %d  %d  %d  %d  %d  %d  %d %d\n",
  55                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 0],
  56                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 1],
  57                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 2],
  58                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 3],
  59                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 4],
  60                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 5],
  61                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 6],
  62                         xlr_board_fmn_config.bucket_size[(bkt * 8) + 7]);
  63         pr_info("\n");
  64
  65         pr_info("Credits distribution :\n");
  66         pr_info("Station\t: Size\n");
  67         for (bkt = 0; bkt < 16; bkt++)
  68                 pr_info(" %d  %d  %d  %d  %d  %d  %d %d\n",
  69                         fmn_info->credit_config[(bkt * 8) + 0],
  70                         fmn_info->credit_config[(bkt * 8) + 1],
  71                         fmn_info->credit_config[(bkt * 8) + 2],
  72                         fmn_info->credit_config[(bkt * 8) + 3],
  73                         fmn_info->credit_config[(bkt * 8) + 4],
  74                         fmn_info->credit_config[(bkt * 8) + 5],
  75                         fmn_info->credit_config[(bkt * 8) + 6],
  76                         fmn_info->credit_config[(bkt * 8) + 7]);
  77         pr_info("\n");
  78 }
  79
  80 static void check_credit_distribution(void)
  81 {
  82         struct xlr_board_fmn_config *cfg = &xlr_board_fmn_config;
  83         int bkt, n, total_credits, ncores;
  84
  85         ncores = hweight32(nlm_current_node()->coremask);
  86         for (bkt = 0; bkt < 128; bkt++) {
  87                 total_credits = 0;
  88                 for (n = 0; n < ncores; n++)
  89                         total_credits += cfg->cpu[n].credit_config[bkt];
  90                 total_credits += cfg->gmac[0].credit_config[bkt];
  91                 total_credits += cfg->gmac[1].credit_config[bkt];
  92                 total_credits += cfg->dma.credit_config[bkt];
  93                 total_credits += cfg->cmp.credit_config[bkt];
  94                 total_credits += cfg->sae.credit_config[bkt];
  95                 total_credits += cfg->xgmac[0].credit_config[bkt];
  96                 total_credits += cfg->xgmac[1].credit_config[bkt];
  97                 if (total_credits > cfg->bucket_size[bkt])
  98                         pr_err("ERROR: Bucket %d: credits (%d) > size (%d)\n",
  99                                 bkt, total_credits, cfg->bucket_size[bkt]);
 100         }
 101         pr_info("Credit distribution complete.\n");
 102 }
 103
 104 /**
 105  * Configure bucket size and credits for a device. 'size' is the size of
 106  * the buckets for the device. This size is distributed among all the CPUs
 107  * so that all of them can send messages to the device.
 108  *
 109  * The device is also given 'cpu_credits' to send messages to the CPUs
 110  *
 111  * @dev_info: FMN information structure for each devices
 112  * @start_stn_id: Starting station id of dev_info
 113  * @end_stn_id: End station id of dev_info
 114  * @num_buckets: Total number of buckets for den_info
 115  * @cpu_credits: Allowed credits to cpu for each devices pointing by dev_info
 116  * @size: Size of the each buckets in the device station
 117  */
 118 static void setup_fmn_cc(struct xlr_fmn_info *dev_info, int start_stn_id,
 119                 int end_stn_id, int num_buckets, int cpu_credits, int size)
 120 {
 121         int i, j, num_core, n, credits_per_cpu;
 122         struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
 123
 124         num_core = hweight32(nlm_current_node()->coremask);
 125         dev_info->num_buckets   = num_buckets;
 126         dev_info->start_stn_id  = start_stn_id;
 127         dev_info->end_stn_id    = end_stn_id;
 128
 129         n = num_core;
 130         if (num_core == 3)
 131                 n = 4;
 132
 133         for (i = start_stn_id; i <= end_stn_id; i++) {
 134                 xlr_board_fmn_config.bucket_size[i] = size;
 135
 136                 /* Dividing device credits equally to cpus */
 137                 credits_per_cpu = size / n;
 138                 for (j = 0; j < num_core; j++)
 139                         cpu[j].credit_config[i] = credits_per_cpu;
 140
 141                 /* credits left to distribute */
 142                 credits_per_cpu = size - (credits_per_cpu * num_core);
 143
 144                 /* distribute the remaining credits (if any), among cores */
 145                 for (j = 0; (j < num_core) && (credits_per_cpu >= 4); j++) {
 146                         cpu[j].credit_config[i] += 4;
 147                         credits_per_cpu -= 4;
 148                 }
 149         }
 150
 151         /* Distributing cpu per bucket credits to devices */
 152         for (i = 0; i < num_core; i++) {
 153                 for (j = 0; j < FMN_CORE_NBUCKETS; j++)
 154                         dev_info->credit_config[(i * 8) + j] = cpu_credits;
 155         }
 156 }
 157
 158 /*
 159  * Each core has 256 slots and 8 buckets,
 160  * Configure the 8 buckets each with 32 slots
 161  */
 162 static void setup_cpu_fmninfo(struct xlr_fmn_info *cpu, int num_core)
 163 {
 164         int i, j;
 165
 166         for (i = 0; i < num_core; i++) {
 167                 cpu[i].start_stn_id     = (8 * i);
 168                 cpu[i].end_stn_id       = (8 * i + 8);
 169
 170                 for (j = cpu[i].start_stn_id; j < cpu[i].end_stn_id; j++)
 171                         xlr_board_fmn_config.bucket_size[j] = 32;
 172         }
 173 }
 174
 175 /**
 176  * Setup the FMN details for each devices according to the device available
 177  * in each variant of XLR/XLS processor
 178  */
 179 void xlr_board_info_setup(void)
 180 {
 181         struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
 182         struct xlr_fmn_info *gmac = xlr_board_fmn_config.gmac;
 183         struct xlr_fmn_info *xgmac = xlr_board_fmn_config.xgmac;
 184         struct xlr_fmn_info *dma = &xlr_board_fmn_config.dma;
 185         struct xlr_fmn_info *cmp = &xlr_board_fmn_config.cmp;
 186         struct xlr_fmn_info *sae = &xlr_board_fmn_config.sae;
 187         int processor_id, num_core;
 188
 189         num_core = hweight32(nlm_current_node()->coremask);
 190         processor_id = read_c0_prid() & 0xff00;
 191
 192         setup_cpu_fmninfo(cpu, num_core);
 193         switch (processor_id) {
 194         case PRID_IMP_NETLOGIC_XLS104:
 195         case PRID_IMP_NETLOGIC_XLS108:
 196                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 197                                         FMN_STNID_GMAC0_TX3, 8, 16, 32);
 198                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 199                                         FMN_STNID_DMA_3, 4, 8, 64);
 200                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 201                                         FMN_STNID_SEC1, 2, 8, 128);
 202                 break;
 203
 204         case PRID_IMP_NETLOGIC_XLS204:
 205         case PRID_IMP_NETLOGIC_XLS208:
 206                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 207                                         FMN_STNID_GMAC0_TX3, 8, 16, 32);
 208                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 209                                         FMN_STNID_DMA_3, 4, 8, 64);
 210                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 211                                         FMN_STNID_SEC1, 2, 8, 128);
 212                 break;
 213
 214         case PRID_IMP_NETLOGIC_XLS404:
 215         case PRID_IMP_NETLOGIC_XLS408:
 216         case PRID_IMP_NETLOGIC_XLS404B:
 217         case PRID_IMP_NETLOGIC_XLS408B:
 218         case PRID_IMP_NETLOGIC_XLS416B:
 219                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 220                                         FMN_STNID_GMAC0_TX3, 8, 8, 32);
 221                 setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
 222                                         FMN_STNID_GMAC1_TX3, 8, 8, 32);
 223                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 224                                         FMN_STNID_DMA_3, 4, 4, 64);
 225                 setup_fmn_cc(cmp, FMN_STNID_CMP_0,
 226                                         FMN_STNID_CMP_3, 4, 4, 64);
 227                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 228                                         FMN_STNID_SEC1, 2, 8, 128);
 229                 break;
 230
 231         case PRID_IMP_NETLOGIC_XLS412B:
 232                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 233                                         FMN_STNID_GMAC0_TX3, 8, 8, 32);
 234                 setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
 235                                         FMN_STNID_GMAC1_TX3, 8, 8, 32);
 236                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 237                                         FMN_STNID_DMA_3, 4, 4, 64);
 238                 setup_fmn_cc(cmp, FMN_STNID_CMP_0,
 239                                         FMN_STNID_CMP_3, 4, 4, 64);
 240                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 241                                         FMN_STNID_SEC1, 2, 8, 128);
 242                 break;
 243
 244         case PRID_IMP_NETLOGIC_XLR308:
 245         case PRID_IMP_NETLOGIC_XLR308C:
 246                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 247                                         FMN_STNID_GMAC0_TX3, 8, 16, 32);
 248                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 249                                         FMN_STNID_DMA_3, 4, 8, 64);
 250                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 251                                         FMN_STNID_SEC1, 2, 4, 128);
 252                 break;
 253
 254         case PRID_IMP_NETLOGIC_XLR532:
 255         case PRID_IMP_NETLOGIC_XLR532C:
 256         case PRID_IMP_NETLOGIC_XLR516C:
 257         case PRID_IMP_NETLOGIC_XLR508C:
 258                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 259                                         FMN_STNID_GMAC0_TX3, 8, 16, 32);
 260                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 261                                         FMN_STNID_DMA_3, 4, 8, 64);
 262                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 263                                         FMN_STNID_SEC1, 2, 4, 128);
 264                 break;
 265
 266         case PRID_IMP_NETLOGIC_XLR732:
 267         case PRID_IMP_NETLOGIC_XLR716:
 268                 setup_fmn_cc(&xgmac[0], FMN_STNID_XMAC0_00_TX,
 269                                         FMN_STNID_XMAC0_15_TX, 8, 0, 32);
 270                 setup_fmn_cc(&xgmac[1], FMN_STNID_XMAC1_00_TX,
 271                                         FMN_STNID_XMAC1_15_TX, 8, 0, 32);
 272                 setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
 273                                         FMN_STNID_GMAC0_TX3, 8, 24, 32);
 274                 setup_fmn_cc(dma, FMN_STNID_DMA_0,
 275                                         FMN_STNID_DMA_3, 4, 4, 64);
 276                 setup_fmn_cc(sae, FMN_STNID_SEC0,
 277                                         FMN_STNID_SEC1, 2, 4, 128);
 278                 break;
 279         default:
 280                 pr_err("Unknown CPU with processor ID [%d]\n", processor_id);
 281                 pr_err("Error: Cannot initialize FMN credits.\n");
 282         }
 283
 284         check_credit_distribution();
 285
 286 #if 0 /* debug */
 287         print_credit_config(&cpu[0]);
 288         print_credit_config(&gmac[0]);
 289 #endif
 290 }