kernel/drivers/net/ethernet/mellanox/mlx4/profile.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   4  * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/slab.h>
  36
  37 #include "mlx4.h"
  38 #include "fw.h"
  39
  40 enum {
  41         MLX4_RES_QP,
  42         MLX4_RES_RDMARC,
  43         MLX4_RES_ALTC,
  44         MLX4_RES_AUXC,
  45         MLX4_RES_SRQ,
  46         MLX4_RES_CQ,
  47         MLX4_RES_EQ,
  48         MLX4_RES_DMPT,
  49         MLX4_RES_CMPT,
  50         MLX4_RES_MTT,
  51         MLX4_RES_MCG,
  52         MLX4_RES_NUM
  53 };
  54
  55 static const char *res_name[] = {
  56         [MLX4_RES_QP]           = "QP",
  57         [MLX4_RES_RDMARC]       = "RDMARC",
  58         [MLX4_RES_ALTC]         = "ALTC",
  59         [MLX4_RES_AUXC]         = "AUXC",
  60         [MLX4_RES_SRQ]          = "SRQ",
  61         [MLX4_RES_CQ]           = "CQ",
  62         [MLX4_RES_EQ]           = "EQ",
  63         [MLX4_RES_DMPT]         = "DMPT",
  64         [MLX4_RES_CMPT]         = "CMPT",
  65         [MLX4_RES_MTT]          = "MTT",
  66         [MLX4_RES_MCG]          = "MCG",
  67 };
  68
  69 u64 mlx4_make_profile(struct mlx4_dev *dev,
  70                       struct mlx4_profile *request,
  71                       struct mlx4_dev_cap *dev_cap,
  72                       struct mlx4_init_hca_param *init_hca)
  73 {
  74         struct mlx4_priv *priv = mlx4_priv(dev);
  75         struct mlx4_resource {
  76                 u64 size;
  77                 u64 start;
  78                 int type;
  79                 u32 num;
  80                 int log_num;
  81         };
  82
  83         u64 total_size = 0;
  84         struct mlx4_resource *profile;
  85         struct sysinfo si;
  86         int i, j;
  87
  88         profile = kcalloc(MLX4_RES_NUM, sizeof(*profile), GFP_KERNEL);
  89         if (!profile)
  90                 return -ENOMEM;
  91
  92         /*
  93          * We want to scale the number of MTTs with the size of the
  94          * system memory, since it makes sense to register a lot of
  95          * memory on a system with a lot of memory.  As a heuristic,
  96          * make sure we have enough MTTs to cover twice the system
  97          * memory (with PAGE_SIZE entries).
  98          *
  99          * This number has to be a power of two and fit into 32 bits
 100          * due to device limitations, so cap this at 2^31 as well.
 101          * That limits us to 8TB of memory registration per HCA with
 102          * 4KB pages, which is probably OK for the next few months.
 103          */
 104         si_meminfo(&si);
 105         request->num_mtt =
 106                 roundup_pow_of_two(max_t(unsigned, request->num_mtt,
 107                                          min(1UL << (31 - log_mtts_per_seg),
 108                                              si.totalram >> (log_mtts_per_seg - 1))));
 109
 110         profile[MLX4_RES_QP].size     = dev_cap->qpc_entry_sz;
 111         profile[MLX4_RES_RDMARC].size = dev_cap->rdmarc_entry_sz;
 112         profile[MLX4_RES_ALTC].size   = dev_cap->altc_entry_sz;
 113         profile[MLX4_RES_AUXC].size   = dev_cap->aux_entry_sz;
 114         profile[MLX4_RES_SRQ].size    = dev_cap->srq_entry_sz;
 115         profile[MLX4_RES_CQ].size     = dev_cap->cqc_entry_sz;
 116         profile[MLX4_RES_EQ].size     = dev_cap->eqc_entry_sz;
 117         profile[MLX4_RES_DMPT].size   = dev_cap->dmpt_entry_sz;
 118         profile[MLX4_RES_CMPT].size   = dev_cap->cmpt_entry_sz;
 119         profile[MLX4_RES_MTT].size    = dev_cap->mtt_entry_sz;
 120         profile[MLX4_RES_MCG].size    = mlx4_get_mgm_entry_size(dev);
 121
 122         profile[MLX4_RES_QP].num      = request->num_qp;
 123         profile[MLX4_RES_RDMARC].num  = request->num_qp * request->rdmarc_per_qp;
 124         profile[MLX4_RES_ALTC].num    = request->num_qp;
 125         profile[MLX4_RES_AUXC].num    = request->num_qp;
 126         profile[MLX4_RES_SRQ].num     = request->num_srq;
 127         profile[MLX4_RES_CQ].num      = request->num_cq;
 128         profile[MLX4_RES_EQ].num = mlx4_is_mfunc(dev) ? dev->phys_caps.num_phys_eqs :
 129                                         min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
 130         profile[MLX4_RES_DMPT].num    = request->num_mpt;
 131         profile[MLX4_RES_CMPT].num    = MLX4_NUM_CMPTS;
 132         profile[MLX4_RES_MTT].num     = request->num_mtt * (1 << log_mtts_per_seg);
 133         profile[MLX4_RES_MCG].num     = request->num_mcg;
 134
 135         for (i = 0; i < MLX4_RES_NUM; ++i) {
 136                 profile[i].type     = i;
 137                 profile[i].num      = roundup_pow_of_two(profile[i].num);
 138                 profile[i].log_num  = ilog2(profile[i].num);
 139                 profile[i].size    *= profile[i].num;
 140                 profile[i].size     = max(profile[i].size, (u64) PAGE_SIZE);
 141         }
 142
 143         /*
 144          * Sort the resources in decreasing order of size.  Since they
 145          * all have sizes that are powers of 2, we'll be able to keep
 146          * resources aligned to their size and pack them without gaps
 147          * using the sorted order.
 148          */
 149         for (i = MLX4_RES_NUM; i > 0; --i)
 150                 for (j = 1; j < i; ++j) {
 151                         if (profile[j].size > profile[j - 1].size)
 152                                 swap(profile[j], profile[j - 1]);
 153                 }
 154
 155         for (i = 0; i < MLX4_RES_NUM; ++i) {
 156                 if (profile[i].size) {
 157                         profile[i].start = total_size;
 158                         total_size      += profile[i].size;
 159                 }
 160
 161                 if (total_size > dev_cap->max_icm_sz) {
 162                         mlx4_err(dev, "Profile requires 0x%llx bytes; won't fit in 0x%llx bytes of context memory\n",
 163                                  (unsigned long long) total_size,
 164                                  (unsigned long long) dev_cap->max_icm_sz);
 165                         kfree(profile);
 166                         return -ENOMEM;
 167                 }
 168
 169                 if (profile[i].size)
 170                         mlx4_dbg(dev, "  profile[%2d] (%6s): 2^%02d entries @ 0x%10llx, size 0x%10llx\n",
 171                                  i, res_name[profile[i].type],
 172                                  profile[i].log_num,
 173                                  (unsigned long long) profile[i].start,
 174                                  (unsigned long long) profile[i].size);
 175         }
 176
 177         mlx4_dbg(dev, "HCA context memory: reserving %d KB\n",
 178                  (int) (total_size >> 10));
 179
 180         for (i = 0; i < MLX4_RES_NUM; ++i) {
 181                 switch (profile[i].type) {
 182                 case MLX4_RES_QP:
 183                         dev->caps.num_qps     = profile[i].num;
 184                         init_hca->qpc_base    = profile[i].start;
 185                         init_hca->log_num_qps = profile[i].log_num;
 186                         break;
 187                 case MLX4_RES_RDMARC:
 188                         for (priv->qp_table.rdmarc_shift = 0;
 189                              request->num_qp << priv->qp_table.rdmarc_shift < profile[i].num;
 190                              ++priv->qp_table.rdmarc_shift)
 191                                 ; /* nothing */
 192                         dev->caps.max_qp_dest_rdma = 1 << priv->qp_table.rdmarc_shift;
 193                         priv->qp_table.rdmarc_base   = (u32) profile[i].start;
 194                         init_hca->rdmarc_base        = profile[i].start;
 195                         init_hca->log_rd_per_qp      = priv->qp_table.rdmarc_shift;
 196                         break;
 197                 case MLX4_RES_ALTC:
 198                         init_hca->altc_base = profile[i].start;
 199                         break;
 200                 case MLX4_RES_AUXC:
 201                         init_hca->auxc_base = profile[i].start;
 202                         break;
 203                 case MLX4_RES_SRQ:
 204                         dev->caps.num_srqs     = profile[i].num;
 205                         init_hca->srqc_base    = profile[i].start;
 206                         init_hca->log_num_srqs = profile[i].log_num;
 207                         break;
 208                 case MLX4_RES_CQ:
 209                         dev->caps.num_cqs     = profile[i].num;
 210                         init_hca->cqc_base    = profile[i].start;
 211                         init_hca->log_num_cqs = profile[i].log_num;
 212                         break;
 213                 case MLX4_RES_EQ:
 214                         if (dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS) {
 215                                 init_hca->log_num_eqs = 0x1f;
 216                                 init_hca->eqc_base    = profile[i].start;
 217                                 init_hca->num_sys_eqs = dev_cap->num_sys_eqs;
 218                         } else {
 219                                 dev->caps.num_eqs     = roundup_pow_of_two(
 220                                                                 min_t(unsigned,
 221                                                                       dev_cap->max_eqs,
 222                                                                       MAX_MSIX));
 223                                 init_hca->eqc_base    = profile[i].start;
 224                                 init_hca->log_num_eqs = ilog2(dev->caps.num_eqs);
 225                         }
 226                         break;
 227                 case MLX4_RES_DMPT:
 228                         dev->caps.num_mpts      = profile[i].num;
 229                         priv->mr_table.mpt_base = profile[i].start;
 230                         init_hca->dmpt_base     = profile[i].start;
 231                         init_hca->log_mpt_sz    = profile[i].log_num;
 232                         break;
 233                 case MLX4_RES_CMPT:
 234                         init_hca->cmpt_base      = profile[i].start;
 235                         break;
 236                 case MLX4_RES_MTT:
 237                         dev->caps.num_mtts       = profile[i].num;
 238                         priv->mr_table.mtt_base  = profile[i].start;
 239                         init_hca->mtt_base       = profile[i].start;
 240                         break;
 241                 case MLX4_RES_MCG:
 242                         init_hca->mc_base         = profile[i].start;
 243                         init_hca->log_mc_entry_sz =
 244                                         ilog2(mlx4_get_mgm_entry_size(dev));
 245                         init_hca->log_mc_table_sz = profile[i].log_num;
 246                         if (dev->caps.steering_mode ==
 247                             MLX4_STEERING_MODE_DEVICE_MANAGED) {
 248                                 dev->caps.num_mgms = profile[i].num;
 249                         } else {
 250                                 init_hca->log_mc_hash_sz =
 251                                                 profile[i].log_num - 1;
 252                                 dev->caps.num_mgms = profile[i].num >> 1;
 253                                 dev->caps.num_amgms = profile[i].num >> 1;
 254                         }
 255                         break;
 256                 default:
 257                         break;
 258                 }
 259         }
 260
 261         /*
 262          * PDs don't take any HCA memory, but we assign them as part
 263          * of the HCA profile anyway.
 264          */
 265         dev->caps.num_pds = MLX4_NUM_PDS;
 266
 267         kfree(profile);
 268         return total_size;
 269 }