drivers/infiniband/hw/mthca/mthca_profile.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. 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
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/string.h>
  37 #include <linux/slab.h>
  38
  39 #include "mthca_profile.h"
  40
  41 enum {
  42         MTHCA_RES_QP,
  43         MTHCA_RES_EEC,
  44         MTHCA_RES_SRQ,
  45         MTHCA_RES_CQ,
  46         MTHCA_RES_EQP,
  47         MTHCA_RES_EEEC,
  48         MTHCA_RES_EQ,
  49         MTHCA_RES_RDB,
  50         MTHCA_RES_MCG,
  51         MTHCA_RES_MPT,
  52         MTHCA_RES_MTT,
  53         MTHCA_RES_UAR,
  54         MTHCA_RES_UDAV,
  55         MTHCA_RES_UARC,
  56         MTHCA_RES_NUM
  57 };
  58
  59 enum {
  60         MTHCA_NUM_EQS = 32,
  61         MTHCA_NUM_PDS = 1 << 15
  62 };
  63
  64 s64 mthca_make_profile(struct mthca_dev *dev,
  65                        struct mthca_profile *request,
  66                        struct mthca_dev_lim *dev_lim,
  67                        struct mthca_init_hca_param *init_hca)
  68 {
  69         struct mthca_resource {
  70                 u64 size;
  71                 u64 start;
  72                 int type;
  73                 int num;
  74                 int log_num;
  75         };
  76
  77         u64 mem_base, mem_avail;
  78         s64 total_size = 0;
  79         struct mthca_resource *profile;
  80         int i, j;
  81
  82         profile = kcalloc(MTHCA_RES_NUM, sizeof(*profile), GFP_KERNEL);
  83         if (!profile)
  84                 return -ENOMEM;
  85
  86         profile[MTHCA_RES_QP].size   = dev_lim->qpc_entry_sz;
  87         profile[MTHCA_RES_EEC].size  = dev_lim->eec_entry_sz;
  88         profile[MTHCA_RES_SRQ].size  = dev_lim->srq_entry_sz;
  89         profile[MTHCA_RES_CQ].size   = dev_lim->cqc_entry_sz;
  90         profile[MTHCA_RES_EQP].size  = dev_lim->eqpc_entry_sz;
  91         profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz;
  92         profile[MTHCA_RES_EQ].size   = dev_lim->eqc_entry_sz;
  93         profile[MTHCA_RES_RDB].size  = MTHCA_RDB_ENTRY_SIZE;
  94         profile[MTHCA_RES_MCG].size  = MTHCA_MGM_ENTRY_SIZE;
  95         profile[MTHCA_RES_MPT].size  = dev_lim->mpt_entry_sz;
  96         profile[MTHCA_RES_MTT].size  = dev->limits.mtt_seg_size;
  97         profile[MTHCA_RES_UAR].size  = dev_lim->uar_scratch_entry_sz;
  98         profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE;
  99         profile[MTHCA_RES_UARC].size = request->uarc_size;
 100
 101         profile[MTHCA_RES_QP].num    = request->num_qp;
 102         profile[MTHCA_RES_SRQ].num   = request->num_srq;
 103         profile[MTHCA_RES_EQP].num   = request->num_qp;
 104         profile[MTHCA_RES_RDB].num   = request->num_qp * request->rdb_per_qp;
 105         profile[MTHCA_RES_CQ].num    = request->num_cq;
 106         profile[MTHCA_RES_EQ].num    = MTHCA_NUM_EQS;
 107         profile[MTHCA_RES_MCG].num   = request->num_mcg;
 108         profile[MTHCA_RES_MPT].num   = request->num_mpt;
 109         profile[MTHCA_RES_MTT].num   = request->num_mtt;
 110         profile[MTHCA_RES_UAR].num   = request->num_uar;
 111         profile[MTHCA_RES_UARC].num  = request->num_uar;
 112         profile[MTHCA_RES_UDAV].num  = request->num_udav;
 113
 114         for (i = 0; i < MTHCA_RES_NUM; ++i) {
 115                 profile[i].type     = i;
 116                 profile[i].log_num  = max(ffs(profile[i].num) - 1, 0);
 117                 profile[i].size    *= profile[i].num;
 118                 if (mthca_is_memfree(dev))
 119                         profile[i].size = max(profile[i].size, (u64) PAGE_SIZE);
 120         }
 121
 122         if (mthca_is_memfree(dev)) {
 123                 mem_base  = 0;
 124                 mem_avail = dev_lim->hca.arbel.max_icm_sz;
 125         } else {
 126                 mem_base  = dev->ddr_start;
 127                 mem_avail = dev->fw.tavor.fw_start - dev->ddr_start;
 128         }
 129
 130         /*
 131          * Sort the resources in decreasing order of size.  Since they
 132          * all have sizes that are powers of 2, we'll be able to keep
 133          * resources aligned to their size and pack them without gaps
 134          * using the sorted order.
 135          */
 136         for (i = MTHCA_RES_NUM; i > 0; --i)
 137                 for (j = 1; j < i; ++j) {
 138                         if (profile[j].size > profile[j - 1].size)
 139                                 swap(profile[j], profile[j - 1]);
 140                 }
 141
 142         for (i = 0; i < MTHCA_RES_NUM; ++i) {
 143                 if (profile[i].size) {
 144                         profile[i].start = mem_base + total_size;
 145                         total_size      += profile[i].size;
 146                 }
 147                 if (total_size > mem_avail) {
 148                         mthca_err(dev, "Profile requires 0x%llx bytes; "
 149                                   "won't fit in 0x%llx bytes of context memory.\n",
 150                                   (unsigned long long) total_size,
 151                                   (unsigned long long) mem_avail);
 152                         kfree(profile);
 153                         return -ENOMEM;
 154                 }
 155
 156                 if (profile[i].size)
 157                         mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx "
 158                                   "(size 0x%8llx)\n",
 159                                   i, profile[i].type, profile[i].log_num,
 160                                   (unsigned long long) profile[i].start,
 161                                   (unsigned long long) profile[i].size);
 162         }
 163
 164         if (mthca_is_memfree(dev))
 165                 mthca_dbg(dev, "HCA context memory: reserving %d KB\n",
 166                           (int) (total_size >> 10));
 167         else
 168                 mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n",
 169                           (int) (total_size >> 10), (int) (mem_avail >> 10),
 170                           (int) ((mem_avail - total_size) >> 10));
 171
 172         for (i = 0; i < MTHCA_RES_NUM; ++i) {
 173                 switch (profile[i].type) {
 174                 case MTHCA_RES_QP:
 175                         dev->limits.num_qps   = profile[i].num;
 176                         init_hca->qpc_base    = profile[i].start;
 177                         init_hca->log_num_qps = profile[i].log_num;
 178                         break;
 179                 case MTHCA_RES_EEC:
 180                         dev->limits.num_eecs   = profile[i].num;
 181                         init_hca->eec_base     = profile[i].start;
 182                         init_hca->log_num_eecs = profile[i].log_num;
 183                         break;
 184                 case MTHCA_RES_SRQ:
 185                         dev->limits.num_srqs   = profile[i].num;
 186                         init_hca->srqc_base    = profile[i].start;
 187                         init_hca->log_num_srqs = profile[i].log_num;
 188                         break;
 189                 case MTHCA_RES_CQ:
 190                         dev->limits.num_cqs   = profile[i].num;
 191                         init_hca->cqc_base    = profile[i].start;
 192                         init_hca->log_num_cqs = profile[i].log_num;
 193                         break;
 194                 case MTHCA_RES_EQP:
 195                         init_hca->eqpc_base = profile[i].start;
 196                         break;
 197                 case MTHCA_RES_EEEC:
 198                         init_hca->eeec_base = profile[i].start;
 199                         break;
 200                 case MTHCA_RES_EQ:
 201                         dev->limits.num_eqs   = profile[i].num;
 202                         init_hca->eqc_base    = profile[i].start;
 203                         init_hca->log_num_eqs = profile[i].log_num;
 204                         break;
 205                 case MTHCA_RES_RDB:
 206                         for (dev->qp_table.rdb_shift = 0;
 207                              request->num_qp << dev->qp_table.rdb_shift < profile[i].num;
 208                              ++dev->qp_table.rdb_shift)
 209                                 ; /* nothing */
 210                         dev->qp_table.rdb_base    = (u32) profile[i].start;
 211                         init_hca->rdb_base        = profile[i].start;
 212                         break;
 213                 case MTHCA_RES_MCG:
 214                         dev->limits.num_mgms      = profile[i].num >> 1;
 215                         dev->limits.num_amgms     = profile[i].num >> 1;
 216                         init_hca->mc_base         = profile[i].start;
 217                         init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1;
 218                         init_hca->log_mc_table_sz = profile[i].log_num;
 219                         init_hca->mc_hash_sz      = 1 << (profile[i].log_num - 1);
 220                         break;
 221                 case MTHCA_RES_MPT:
 222                         dev->limits.num_mpts   = profile[i].num;
 223                         dev->mr_table.mpt_base = profile[i].start;
 224                         init_hca->mpt_base     = profile[i].start;
 225                         init_hca->log_mpt_sz   = profile[i].log_num;
 226                         break;
 227                 case MTHCA_RES_MTT:
 228                         dev->limits.num_mtt_segs = profile[i].num;
 229                         dev->mr_table.mtt_base   = profile[i].start;
 230                         init_hca->mtt_base       = profile[i].start;
 231                         init_hca->mtt_seg_sz     = ffs(dev->limits.mtt_seg_size) - 7;
 232                         break;
 233                 case MTHCA_RES_UAR:
 234                         dev->limits.num_uars       = profile[i].num;
 235                         init_hca->uar_scratch_base = profile[i].start;
 236                         break;
 237                 case MTHCA_RES_UDAV:
 238                         dev->av_table.ddr_av_base = profile[i].start;
 239                         dev->av_table.num_ddr_avs = profile[i].num;
 240                         break;
 241                 case MTHCA_RES_UARC:
 242                         dev->uar_table.uarc_size = request->uarc_size;
 243                         dev->uar_table.uarc_base = profile[i].start;
 244                         init_hca->uarc_base      = profile[i].start;
 245                         init_hca->log_uarc_sz    = ffs(request->uarc_size) - 13;
 246                         init_hca->log_uar_sz     = ffs(request->num_uar) - 1;
 247                         break;
 248                 default:
 249                         break;
 250                 }
 251         }
 252
 253         /*
 254          * PDs don't take any HCA memory, but we assign them as part
 255          * of the HCA profile anyway.
 256          */
 257         dev->limits.num_pds = MTHCA_NUM_PDS;
 258
 259         if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT &&
 260             init_hca->log_mpt_sz > 23) {
 261                 mthca_warn(dev, "MPT table too large (requested size 2^%d >= 2^24)\n",
 262                            init_hca->log_mpt_sz);
 263                 mthca_warn(dev, "Disabling memory key throughput optimization.\n");
 264                 dev->mthca_flags &= ~MTHCA_FLAG_SINAI_OPT;
 265         }
 266
 267         /*
 268          * For Tavor, FMRs use ioremapped PCI memory. For 32 bit
 269          * systems it may use too much vmalloc space to map all MTT
 270          * memory, so we reserve some MTTs for FMR access, taking them
 271          * out of the MR pool. They don't use additional memory, but
 272          * we assign them as part of the HCA profile anyway.
 273          */
 274         if (mthca_is_memfree(dev) || BITS_PER_LONG == 64)
 275                 dev->limits.fmr_reserved_mtts = 0;
 276         else
 277                 dev->limits.fmr_reserved_mtts = request->fmr_reserved_mtts;
 278
 279         kfree(profile);
 280         return total_size;
 281 }