hw/mthca/mthca_profile.c

0001 /*
0002  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
0003  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
0004  *
0005  * This software is available to you under a choice of one of two
0006  * licenses.  You may choose to be licensed under the terms of the GNU
0007  * General Public License (GPL) Version 2, available from the file
0008  * COPYING in the main directory of this source tree, or the
0009  * OpenIB.org BSD license below:
0010  *
0011  *     Redistribution and use in source and binary forms, with or
0012  *     without modification, are permitted provided that the following
0013  *     conditions are met:
0014  *
0015  *      - Redistributions of source code must retain the above
0016  *        copyright notice, this list of conditions and the following
0017  *        disclaimer.
0018  *
0019  *      - Redistributions in binary form must reproduce the above
0020  *        copyright notice, this list of conditions and the following
0021  *        disclaimer in the documentation and/or other materials
0022  *        provided with the distribution.
0023  *
0024  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
0025  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0026  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
0027  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
0028  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
0029  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0030  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0031  * SOFTWARE.
0032  */
0033
0034 #include <linux/string.h>
0035 #include <linux/slab.h>
0036
0037 #include "mthca_profile.h"
0038
0039 enum {
0040     MTHCA_RES_QP,
0041     MTHCA_RES_EEC,
0042     MTHCA_RES_SRQ,
0043     MTHCA_RES_CQ,
0044     MTHCA_RES_EQP,
0045     MTHCA_RES_EEEC,
0046     MTHCA_RES_EQ,
0047     MTHCA_RES_RDB,
0048     MTHCA_RES_MCG,
0049     MTHCA_RES_MPT,
0050     MTHCA_RES_MTT,
0051     MTHCA_RES_UAR,
0052     MTHCA_RES_UDAV,
0053     MTHCA_RES_UARC,
0054     MTHCA_RES_NUM
0055 };
0056
0057 enum {
0058     MTHCA_NUM_EQS = 32,
0059     MTHCA_NUM_PDS = 1 << 15
0060 };
0061
0062 s64 mthca_make_profile(struct mthca_dev *dev,
0063                struct mthca_profile *request,
0064                struct mthca_dev_lim *dev_lim,
0065                struct mthca_init_hca_param *init_hca)
0066 {
0067     struct mthca_resource {
0068         u64 size;
0069         u64 start;
0070         int type;
0071         int num;
0072         int log_num;
0073     };
0074
0075     u64 mem_base, mem_avail;
0076     s64 total_size = 0;
0077     struct mthca_resource *profile;
0078     int i, j;
0079
0080     profile = kcalloc(MTHCA_RES_NUM, sizeof(*profile), GFP_KERNEL);
0081     if (!profile)
0082         return -ENOMEM;
0083
0084     profile[MTHCA_RES_QP].size   = dev_lim->qpc_entry_sz;
0085     profile[MTHCA_RES_EEC].size  = dev_lim->eec_entry_sz;
0086     profile[MTHCA_RES_SRQ].size  = dev_lim->srq_entry_sz;
0087     profile[MTHCA_RES_CQ].size   = dev_lim->cqc_entry_sz;
0088     profile[MTHCA_RES_EQP].size  = dev_lim->eqpc_entry_sz;
0089     profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz;
0090     profile[MTHCA_RES_EQ].size   = dev_lim->eqc_entry_sz;
0091     profile[MTHCA_RES_RDB].size  = MTHCA_RDB_ENTRY_SIZE;
0092     profile[MTHCA_RES_MCG].size  = MTHCA_MGM_ENTRY_SIZE;
0093     profile[MTHCA_RES_MPT].size  = dev_lim->mpt_entry_sz;
0094     profile[MTHCA_RES_MTT].size  = dev->limits.mtt_seg_size;
0095     profile[MTHCA_RES_UAR].size  = dev_lim->uar_scratch_entry_sz;
0096     profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE;
0097     profile[MTHCA_RES_UARC].size = request->uarc_size;
0098
0099     profile[MTHCA_RES_QP].num    = request->num_qp;
0100     profile[MTHCA_RES_SRQ].num   = request->num_srq;
0101     profile[MTHCA_RES_EQP].num   = request->num_qp;
0102     profile[MTHCA_RES_RDB].num   = request->num_qp * request->rdb_per_qp;
0103     profile[MTHCA_RES_CQ].num    = request->num_cq;
0104     profile[MTHCA_RES_EQ].num    = MTHCA_NUM_EQS;
0105     profile[MTHCA_RES_MCG].num   = request->num_mcg;
0106     profile[MTHCA_RES_MPT].num   = request->num_mpt;
0107     profile[MTHCA_RES_MTT].num   = request->num_mtt;
0108     profile[MTHCA_RES_UAR].num   = request->num_uar;
0109     profile[MTHCA_RES_UARC].num  = request->num_uar;
0110     profile[MTHCA_RES_UDAV].num  = request->num_udav;
0111
0112     for (i = 0; i < MTHCA_RES_NUM; ++i) {
0113         profile[i].type     = i;
0114         profile[i].log_num  = max(ffs(profile[i].num) - 1, 0);
0115         profile[i].size    *= profile[i].num;
0116         if (mthca_is_memfree(dev))
0117             profile[i].size = max(profile[i].size, (u64) PAGE_SIZE);
0118     }
0119
0120     if (mthca_is_memfree(dev)) {
0121         mem_base  = 0;
0122         mem_avail = dev_lim->hca.arbel.max_icm_sz;
0123     } else {
0124         mem_base  = dev->ddr_start;
0125         mem_avail = dev->fw.tavor.fw_start - dev->ddr_start;
0126     }
0127
0128     /*
0129      * Sort the resources in decreasing order of size.  Since they
0130      * all have sizes that are powers of 2, we'll be able to keep
0131      * resources aligned to their size and pack them without gaps
0132      * using the sorted order.
0133      */
0134     for (i = MTHCA_RES_NUM; i > 0; --i)
0135         for (j = 1; j < i; ++j) {
0136             if (profile[j].size > profile[j - 1].size)
0137                 swap(profile[j], profile[j - 1]);
0138         }
0139
0140     for (i = 0; i < MTHCA_RES_NUM; ++i) {
0141         if (profile[i].size) {
0142             profile[i].start = mem_base + total_size;
0143             total_size      += profile[i].size;
0144         }
0145         if (total_size > mem_avail) {
0146             mthca_err(dev, "Profile requires 0x%llx bytes; "
0147                   "won't fit in 0x%llx bytes of context memory.\n",
0148                   (unsigned long long) total_size,
0149                   (unsigned long long) mem_avail);
0150             kfree(profile);
0151             return -ENOMEM;
0152         }
0153
0154         if (profile[i].size)
0155             mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx "
0156                   "(size 0x%8llx)\n",
0157                   i, profile[i].type, profile[i].log_num,
0158                   (unsigned long long) profile[i].start,
0159                   (unsigned long long) profile[i].size);
0160     }
0161
0162     if (mthca_is_memfree(dev))
0163         mthca_dbg(dev, "HCA context memory: reserving %d KB\n",
0164               (int) (total_size >> 10));
0165     else
0166         mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n",
0167               (int) (total_size >> 10), (int) (mem_avail >> 10),
0168               (int) ((mem_avail - total_size) >> 10));
0169
0170     for (i = 0; i < MTHCA_RES_NUM; ++i) {
0171         switch (profile[i].type) {
0172         case MTHCA_RES_QP:
0173             dev->limits.num_qps   = profile[i].num;
0174             init_hca->qpc_base    = profile[i].start;
0175             init_hca->log_num_qps = profile[i].log_num;
0176             break;
0177         case MTHCA_RES_EEC:
0178             dev->limits.num_eecs   = profile[i].num;
0179             init_hca->eec_base     = profile[i].start;
0180             init_hca->log_num_eecs = profile[i].log_num;
0181             break;
0182         case MTHCA_RES_SRQ:
0183             dev->limits.num_srqs   = profile[i].num;
0184             init_hca->srqc_base    = profile[i].start;
0185             init_hca->log_num_srqs = profile[i].log_num;
0186             break;
0187         case MTHCA_RES_CQ:
0188             dev->limits.num_cqs   = profile[i].num;
0189             init_hca->cqc_base    = profile[i].start;
0190             init_hca->log_num_cqs = profile[i].log_num;
0191             break;
0192         case MTHCA_RES_EQP:
0193             init_hca->eqpc_base = profile[i].start;
0194             break;
0195         case MTHCA_RES_EEEC:
0196             init_hca->eeec_base = profile[i].start;
0197             break;
0198         case MTHCA_RES_EQ:
0199             dev->limits.num_eqs   = profile[i].num;
0200             init_hca->eqc_base    = profile[i].start;
0201             init_hca->log_num_eqs = profile[i].log_num;
0202             break;
0203         case MTHCA_RES_RDB:
0204             for (dev->qp_table.rdb_shift = 0;
0205                  request->num_qp << dev->qp_table.rdb_shift < profile[i].num;
0206                  ++dev->qp_table.rdb_shift)
0207                 ; /* nothing */
0208             dev->qp_table.rdb_base    = (u32) profile[i].start;
0209             init_hca->rdb_base        = profile[i].start;
0210             break;
0211         case MTHCA_RES_MCG:
0212             dev->limits.num_mgms      = profile[i].num >> 1;
0213             dev->limits.num_amgms     = profile[i].num >> 1;
0214             init_hca->mc_base         = profile[i].start;
0215             init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1;
0216             init_hca->log_mc_table_sz = profile[i].log_num;
0217             init_hca->mc_hash_sz      = 1 << (profile[i].log_num - 1);
0218             break;
0219         case MTHCA_RES_MPT:
0220             dev->limits.num_mpts   = profile[i].num;
0221             dev->mr_table.mpt_base = profile[i].start;
0222             init_hca->mpt_base     = profile[i].start;
0223             init_hca->log_mpt_sz   = profile[i].log_num;
0224             break;
0225         case MTHCA_RES_MTT:
0226             dev->limits.num_mtt_segs = profile[i].num;
0227             dev->mr_table.mtt_base   = profile[i].start;
0228             init_hca->mtt_base       = profile[i].start;
0229             init_hca->mtt_seg_sz     = ffs(dev->limits.mtt_seg_size) - 7;
0230             break;
0231         case MTHCA_RES_UAR:
0232             dev->limits.num_uars       = profile[i].num;
0233             init_hca->uar_scratch_base = profile[i].start;
0234             break;
0235         case MTHCA_RES_UDAV:
0236             dev->av_table.ddr_av_base = profile[i].start;
0237             dev->av_table.num_ddr_avs = profile[i].num;
0238             break;
0239         case MTHCA_RES_UARC:
0240             dev->uar_table.uarc_size = request->uarc_size;
0241             dev->uar_table.uarc_base = profile[i].start;
0242             init_hca->uarc_base      = profile[i].start;
0243             init_hca->log_uarc_sz    = ffs(request->uarc_size) - 13;
0244             init_hca->log_uar_sz     = ffs(request->num_uar) - 1;
0245             break;
0246         default:
0247             break;
0248         }
0249     }
0250
0251     /*
0252      * PDs don't take any HCA memory, but we assign them as part
0253      * of the HCA profile anyway.
0254      */
0255     dev->limits.num_pds = MTHCA_NUM_PDS;
0256
0257     if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT &&
0258         init_hca->log_mpt_sz > 23) {
0259         mthca_warn(dev, "MPT table too large (requested size 2^%d >= 2^24)\n",
0260                init_hca->log_mpt_sz);
0261         mthca_warn(dev, "Disabling memory key throughput optimization.\n");
0262         dev->mthca_flags &= ~MTHCA_FLAG_SINAI_OPT;
0263     }
0264
0265     /*
0266      * For Tavor, FMRs use ioremapped PCI memory. For 32 bit
0267      * systems it may use too much vmalloc space to map all MTT
0268      * memory, so we reserve some MTTs for FMR access, taking them
0269      * out of the MR pool. They don't use additional memory, but
0270      * we assign them as part of the HCA profile anyway.
0271      */
0272     if (mthca_is_memfree(dev) || BITS_PER_LONG == 64)
0273         dev->limits.fmr_reserved_mtts = 0;
0274     else
0275         dev->limits.fmr_reserved_mtts = request->fmr_reserved_mtts;
0276
0277     kfree(profile);
0278     return total_size;
0279 }