bd1338682074bff3f01e3c7fd66945b57429e5a8
[linux-2.6.git] / 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  * $Id: mthca_profile.c 1349 2004-12-16 21:09:43Z roland $
34  */
35
36 #include <linux/module.h>
37 #include <linux/moduleparam.h>
38 #include <linux/string.h>
39 #include <linux/slab.h>
40
41 #include "mthca_profile.h"
42
43 enum {
44         MTHCA_RES_QP,
45         MTHCA_RES_EEC,
46         MTHCA_RES_SRQ,
47         MTHCA_RES_CQ,
48         MTHCA_RES_EQP,
49         MTHCA_RES_EEEC,
50         MTHCA_RES_EQ,
51         MTHCA_RES_RDB,
52         MTHCA_RES_MCG,
53         MTHCA_RES_MPT,
54         MTHCA_RES_MTT,
55         MTHCA_RES_UAR,
56         MTHCA_RES_UDAV,
57         MTHCA_RES_UARC,
58         MTHCA_RES_NUM
59 };
60
61 enum {
62         MTHCA_NUM_EQS = 32,
63         MTHCA_NUM_PDS = 1 << 15
64 };
65
66 u64 mthca_make_profile(struct mthca_dev *dev,
67                        struct mthca_profile *request,
68                        struct mthca_dev_lim *dev_lim,
69                        struct mthca_init_hca_param *init_hca)
70 {
71         struct mthca_resource {
72                 u64 size;
73                 u64 start;
74                 int type;
75                 int num;
76                 int log_num;
77         };
78
79         u64 mem_base, mem_avail;
80         u64 total_size = 0;
81         struct mthca_resource *profile;
82         struct mthca_resource tmp;
83         int i, j;
84
85         profile = kmalloc(MTHCA_RES_NUM * sizeof *profile, GFP_KERNEL);
86         if (!profile)
87                 return -ENOMEM;
88
89         memset(profile, 0, MTHCA_RES_NUM * sizeof *profile);
90
91         profile[MTHCA_RES_QP].size   = dev_lim->qpc_entry_sz;
92         profile[MTHCA_RES_EEC].size  = dev_lim->eec_entry_sz;
93         profile[MTHCA_RES_SRQ].size  = dev_lim->srq_entry_sz;
94         profile[MTHCA_RES_CQ].size   = dev_lim->cqc_entry_sz;
95         profile[MTHCA_RES_EQP].size  = dev_lim->eqpc_entry_sz;
96         profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz;
97         profile[MTHCA_RES_EQ].size   = dev_lim->eqc_entry_sz;
98         profile[MTHCA_RES_RDB].size  = MTHCA_RDB_ENTRY_SIZE;
99         profile[MTHCA_RES_MCG].size  = MTHCA_MGM_ENTRY_SIZE;
100         profile[MTHCA_RES_MPT].size  = dev_lim->mpt_entry_sz;
101         profile[MTHCA_RES_MTT].size  = MTHCA_MTT_SEG_SIZE;
102         profile[MTHCA_RES_UAR].size  = dev_lim->uar_scratch_entry_sz;
103         profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE;
104         profile[MTHCA_RES_UARC].size = request->uarc_size;
105
106         profile[MTHCA_RES_QP].num    = request->num_qp;
107         profile[MTHCA_RES_SRQ].num   = request->num_srq;
108         profile[MTHCA_RES_EQP].num   = request->num_qp;
109         profile[MTHCA_RES_RDB].num   = request->num_qp * request->rdb_per_qp;
110         profile[MTHCA_RES_CQ].num    = request->num_cq;
111         profile[MTHCA_RES_EQ].num    = MTHCA_NUM_EQS;
112         profile[MTHCA_RES_MCG].num   = request->num_mcg;
113         profile[MTHCA_RES_MPT].num   = request->num_mpt;
114         profile[MTHCA_RES_MTT].num   = request->num_mtt;
115         profile[MTHCA_RES_UAR].num   = request->num_uar;
116         profile[MTHCA_RES_UARC].num  = request->num_uar;
117         profile[MTHCA_RES_UDAV].num  = request->num_udav;
118
119         for (i = 0; i < MTHCA_RES_NUM; ++i) {
120                 profile[i].type     = i;
121                 profile[i].log_num  = max(ffs(profile[i].num) - 1, 0);
122                 profile[i].size    *= profile[i].num;
123                 if (mthca_is_memfree(dev))
124                         profile[i].size = max(profile[i].size, (u64) PAGE_SIZE);
125         }
126
127         if (mthca_is_memfree(dev)) {
128                 mem_base  = 0;
129                 mem_avail = dev_lim->hca.arbel.max_icm_sz;
130         } else {
131                 mem_base  = dev->ddr_start;
132                 mem_avail = dev->fw.tavor.fw_start - dev->ddr_start;
133         }
134
135         /*
136          * Sort the resources in decreasing order of size.  Since they
137          * all have sizes that are powers of 2, we'll be able to keep
138          * resources aligned to their size and pack them without gaps
139          * using the sorted order.
140          */
141         for (i = MTHCA_RES_NUM; i > 0; --i)
142                 for (j = 1; j < i; ++j) {
143                         if (profile[j].size > profile[j - 1].size) {
144                                 tmp            = profile[j];
145                                 profile[j]     = profile[j - 1];
146                                 profile[j - 1] = tmp;
147                         }
148                 }
149
150         for (i = 0; i < MTHCA_RES_NUM; ++i) {
151                 if (profile[i].size) {
152                         profile[i].start = mem_base + total_size;
153                         total_size      += profile[i].size;
154                 }
155                 if (total_size > mem_avail) {
156                         mthca_err(dev, "Profile requires 0x%llx bytes; "
157                                   "won't in 0x%llx bytes of context memory.\n",
158                                   (unsigned long long) total_size,
159                                   (unsigned long long) mem_avail);
160                         kfree(profile);
161                         return -ENOMEM;
162                 }
163
164                 if (profile[i].size)
165                         mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx "
166                                   "(size 0x%8llx)\n",
167                                   i, profile[i].type, profile[i].log_num,
168                                   (unsigned long long) profile[i].start,
169                                   (unsigned long long) profile[i].size);
170         }
171
172         if (mthca_is_memfree(dev))
173                 mthca_dbg(dev, "HCA context memory: reserving %d KB\n",
174                           (int) (total_size >> 10));
175         else
176                 mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n",
177                           (int) (total_size >> 10), (int) (mem_avail >> 10),
178                           (int) ((mem_avail - total_size) >> 10));
179
180         for (i = 0; i < MTHCA_RES_NUM; ++i) {
181                 switch (profile[i].type) {
182                 case MTHCA_RES_QP:
183                         dev->limits.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 MTHCA_RES_EEC:
188                         dev->limits.num_eecs   = profile[i].num;
189                         init_hca->eec_base     = profile[i].start;
190                         init_hca->log_num_eecs = profile[i].log_num;
191                         break;
192                 case MTHCA_RES_SRQ:
193                         dev->limits.num_srqs   = profile[i].num;
194                         init_hca->srqc_base    = profile[i].start;
195                         init_hca->log_num_srqs = profile[i].log_num;
196                         break;
197                 case MTHCA_RES_CQ:
198                         dev->limits.num_cqs   = profile[i].num;
199                         init_hca->cqc_base    = profile[i].start;
200                         init_hca->log_num_cqs = profile[i].log_num;
201                         break;
202                 case MTHCA_RES_EQP:
203                         init_hca->eqpc_base = profile[i].start;
204                         break;
205                 case MTHCA_RES_EEEC:
206                         init_hca->eeec_base = profile[i].start;
207                         break;
208                 case MTHCA_RES_EQ:
209                         dev->limits.num_eqs   = profile[i].num;
210                         init_hca->eqc_base    = profile[i].start;
211                         init_hca->log_num_eqs = profile[i].log_num;
212                         break;
213                 case MTHCA_RES_RDB:
214                         for (dev->qp_table.rdb_shift = 0;
215                              request->num_qp << dev->qp_table.rdb_shift < profile[i].num;
216                              ++dev->qp_table.rdb_shift)
217                                 ; /* nothing */
218                         dev->qp_table.rdb_base    = (u32) profile[i].start;
219                         init_hca->rdb_base        = profile[i].start;
220                         break;
221                 case MTHCA_RES_MCG:
222                         dev->limits.num_mgms      = profile[i].num >> 1;
223                         dev->limits.num_amgms     = profile[i].num >> 1;
224                         init_hca->mc_base         = profile[i].start;
225                         init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1;
226                         init_hca->log_mc_table_sz = profile[i].log_num;
227                         init_hca->mc_hash_sz      = 1 << (profile[i].log_num - 1);
228                         break;
229                 case MTHCA_RES_MPT:
230                         dev->limits.num_mpts   = profile[i].num;
231                         dev->mr_table.mpt_base = profile[i].start;
232                         init_hca->mpt_base     = profile[i].start;
233                         init_hca->log_mpt_sz   = profile[i].log_num;
234                         break;
235                 case MTHCA_RES_MTT:
236                         dev->limits.num_mtt_segs = profile[i].num;
237                         dev->mr_table.mtt_base   = profile[i].start;
238                         init_hca->mtt_base       = profile[i].start;
239                         init_hca->mtt_seg_sz     = ffs(MTHCA_MTT_SEG_SIZE) - 7;
240                         break;
241                 case MTHCA_RES_UAR:
242                         dev->limits.num_uars       = profile[i].num;
243                         init_hca->uar_scratch_base = profile[i].start;
244                         break;
245                 case MTHCA_RES_UDAV:
246                         dev->av_table.ddr_av_base = profile[i].start;
247                         dev->av_table.num_ddr_avs = profile[i].num;
248                         break;
249                 case MTHCA_RES_UARC:
250                         dev->uar_table.uarc_size = request->uarc_size;
251                         dev->uar_table.uarc_base = profile[i].start;
252                         init_hca->uarc_base      = profile[i].start;
253                         init_hca->log_uarc_sz    = ffs(request->uarc_size) - 13;
254                         init_hca->log_uar_sz     = ffs(request->num_uar) - 1;
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->limits.num_pds = MTHCA_NUM_PDS;
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))
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 }