net/mlx4_core: Fix number of EQs used in ICM initialisation
[linux-3.10.git] / 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                 int num;
80                 int log_num;
81         };
82
83         u64 total_size = 0;
84         struct mlx4_resource *profile;
85         struct mlx4_resource tmp;
86         struct sysinfo si;
87         int i, j;
88
89         profile = kcalloc(MLX4_RES_NUM, sizeof(*profile), GFP_KERNEL);
90         if (!profile)
91                 return -ENOMEM;
92
93         /*
94          * We want to scale the number of MTTs with the size of the
95          * system memory, since it makes sense to register a lot of
96          * memory on a system with a lot of memory.  As a heuristic,
97          * make sure we have enough MTTs to cover twice the system
98          * memory (with PAGE_SIZE entries).
99          *
100          * This number has to be a power of two and fit into 32 bits
101          * due to device limitations, so cap this at 2^31 as well.
102          * That limits us to 8TB of memory registration per HCA with
103          * 4KB pages, which is probably OK for the next few months.
104          */
105         si_meminfo(&si);
106         request->num_mtt =
107                 roundup_pow_of_two(max_t(unsigned, request->num_mtt,
108                                          min(1UL << 31,
109                                              si.totalram >> (log_mtts_per_seg - 1))));
110
111         profile[MLX4_RES_QP].size     = dev_cap->qpc_entry_sz;
112         profile[MLX4_RES_RDMARC].size = dev_cap->rdmarc_entry_sz;
113         profile[MLX4_RES_ALTC].size   = dev_cap->altc_entry_sz;
114         profile[MLX4_RES_AUXC].size   = dev_cap->aux_entry_sz;
115         profile[MLX4_RES_SRQ].size    = dev_cap->srq_entry_sz;
116         profile[MLX4_RES_CQ].size     = dev_cap->cqc_entry_sz;
117         profile[MLX4_RES_EQ].size     = dev_cap->eqc_entry_sz;
118         profile[MLX4_RES_DMPT].size   = dev_cap->dmpt_entry_sz;
119         profile[MLX4_RES_CMPT].size   = dev_cap->cmpt_entry_sz;
120         profile[MLX4_RES_MTT].size    = dev_cap->mtt_entry_sz;
121         profile[MLX4_RES_MCG].size    = mlx4_get_mgm_entry_size(dev);
122
123         profile[MLX4_RES_QP].num      = request->num_qp;
124         profile[MLX4_RES_RDMARC].num  = request->num_qp * request->rdmarc_per_qp;
125         profile[MLX4_RES_ALTC].num    = request->num_qp;
126         profile[MLX4_RES_AUXC].num    = request->num_qp;
127         profile[MLX4_RES_SRQ].num     = request->num_srq;
128         profile[MLX4_RES_CQ].num      = request->num_cq;
129         profile[MLX4_RES_EQ].num      = mlx4_is_mfunc(dev) ?
130                                         dev->phys_caps.num_phys_eqs :
131                                         min_t(unsigned, dev_cap->max_eqs, MAX_MSIX);
132         profile[MLX4_RES_DMPT].num    = request->num_mpt;
133         profile[MLX4_RES_CMPT].num    = MLX4_NUM_CMPTS;
134         profile[MLX4_RES_MTT].num     = request->num_mtt * (1 << log_mtts_per_seg);
135         profile[MLX4_RES_MCG].num     = request->num_mcg;
136
137         for (i = 0; i < MLX4_RES_NUM; ++i) {
138                 profile[i].type     = i;
139                 profile[i].num      = roundup_pow_of_two(profile[i].num);
140                 profile[i].log_num  = ilog2(profile[i].num);
141                 profile[i].size    *= profile[i].num;
142                 profile[i].size     = max(profile[i].size, (u64) PAGE_SIZE);
143         }
144
145         /*
146          * Sort the resources in decreasing order of size.  Since they
147          * all have sizes that are powers of 2, we'll be able to keep
148          * resources aligned to their size and pack them without gaps
149          * using the sorted order.
150          */
151         for (i = MLX4_RES_NUM; i > 0; --i)
152                 for (j = 1; j < i; ++j) {
153                         if (profile[j].size > profile[j - 1].size) {
154                                 tmp            = profile[j];
155                                 profile[j]     = profile[j - 1];
156                                 profile[j - 1] = tmp;
157                         }
158                 }
159
160         for (i = 0; i < MLX4_RES_NUM; ++i) {
161                 if (profile[i].size) {
162                         profile[i].start = total_size;
163                         total_size      += profile[i].size;
164                 }
165
166                 if (total_size > dev_cap->max_icm_sz) {
167                         mlx4_err(dev, "Profile requires 0x%llx bytes; "
168                                   "won't fit in 0x%llx bytes of context memory.\n",
169                                   (unsigned long long) total_size,
170                                   (unsigned long long) dev_cap->max_icm_sz);
171                         kfree(profile);
172                         return -ENOMEM;
173                 }
174
175                 if (profile[i].size)
176                         mlx4_dbg(dev, "  profile[%2d] (%6s): 2^%02d entries @ 0x%10llx, "
177                                   "size 0x%10llx\n",
178                                  i, res_name[profile[i].type], profile[i].log_num,
179                                  (unsigned long long) profile[i].start,
180                                  (unsigned long long) profile[i].size);
181         }
182
183         mlx4_dbg(dev, "HCA context memory: reserving %d KB\n",
184                  (int) (total_size >> 10));
185
186         for (i = 0; i < MLX4_RES_NUM; ++i) {
187                 switch (profile[i].type) {
188                 case MLX4_RES_QP:
189                         dev->caps.num_qps     = profile[i].num;
190                         init_hca->qpc_base    = profile[i].start;
191                         init_hca->log_num_qps = profile[i].log_num;
192                         break;
193                 case MLX4_RES_RDMARC:
194                         for (priv->qp_table.rdmarc_shift = 0;
195                              request->num_qp << priv->qp_table.rdmarc_shift < profile[i].num;
196                              ++priv->qp_table.rdmarc_shift)
197                                 ; /* nothing */
198                         dev->caps.max_qp_dest_rdma = 1 << priv->qp_table.rdmarc_shift;
199                         priv->qp_table.rdmarc_base   = (u32) profile[i].start;
200                         init_hca->rdmarc_base        = profile[i].start;
201                         init_hca->log_rd_per_qp      = priv->qp_table.rdmarc_shift;
202                         break;
203                 case MLX4_RES_ALTC:
204                         init_hca->altc_base = profile[i].start;
205                         break;
206                 case MLX4_RES_AUXC:
207                         init_hca->auxc_base = profile[i].start;
208                         break;
209                 case MLX4_RES_SRQ:
210                         dev->caps.num_srqs     = profile[i].num;
211                         init_hca->srqc_base    = profile[i].start;
212                         init_hca->log_num_srqs = profile[i].log_num;
213                         break;
214                 case MLX4_RES_CQ:
215                         dev->caps.num_cqs     = profile[i].num;
216                         init_hca->cqc_base    = profile[i].start;
217                         init_hca->log_num_cqs = profile[i].log_num;
218                         break;
219                 case MLX4_RES_EQ:
220                         dev->caps.num_eqs     = roundup_pow_of_two(min_t(unsigned, dev_cap->max_eqs,
221                                                                          MAX_MSIX));
222                         init_hca->eqc_base    = profile[i].start;
223                         init_hca->log_num_eqs = ilog2(dev->caps.num_eqs);
224                         break;
225                 case MLX4_RES_DMPT:
226                         dev->caps.num_mpts      = profile[i].num;
227                         priv->mr_table.mpt_base = profile[i].start;
228                         init_hca->dmpt_base     = profile[i].start;
229                         init_hca->log_mpt_sz    = profile[i].log_num;
230                         break;
231                 case MLX4_RES_CMPT:
232                         init_hca->cmpt_base      = profile[i].start;
233                         break;
234                 case MLX4_RES_MTT:
235                         dev->caps.num_mtts       = profile[i].num;
236                         priv->mr_table.mtt_base  = profile[i].start;
237                         init_hca->mtt_base       = profile[i].start;
238                         break;
239                 case MLX4_RES_MCG:
240                         dev->caps.num_mgms        = profile[i].num >> 1;
241                         dev->caps.num_amgms       = profile[i].num >> 1;
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                         init_hca->log_mc_hash_sz  = profile[i].log_num - 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->caps.num_pds = MLX4_NUM_PDS;
258
259         kfree(profile);
260         return total_size;
261 }