08a909371b0a1060634526b53819314497fcd04a
[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 = kzalloc(MTHCA_RES_NUM * sizeof *profile, GFP_KERNEL);
86         if (!profile)
87                 return -ENOMEM;
88
89         profile[MTHCA_RES_QP].size   = dev_lim->qpc_entry_sz;
90         profile[MTHCA_RES_EEC].size  = dev_lim->eec_entry_sz;
91         profile[MTHCA_RES_SRQ].size  = dev_lim->srq_entry_sz;
92         profile[MTHCA_RES_CQ].size   = dev_lim->cqc_entry_sz;
93         profile[MTHCA_RES_EQP].size  = dev_lim->eqpc_entry_sz;
94         profile[MTHCA_RES_EEEC].size = dev_lim->eeec_entry_sz;
95         profile[MTHCA_RES_EQ].size   = dev_lim->eqc_entry_sz;
96         profile[MTHCA_RES_RDB].size  = MTHCA_RDB_ENTRY_SIZE;
97         profile[MTHCA_RES_MCG].size  = MTHCA_MGM_ENTRY_SIZE;
98         profile[MTHCA_RES_MPT].size  = dev_lim->mpt_entry_sz;
99         profile[MTHCA_RES_MTT].size  = MTHCA_MTT_SEG_SIZE;
100         profile[MTHCA_RES_UAR].size  = dev_lim->uar_scratch_entry_sz;
101         profile[MTHCA_RES_UDAV].size = MTHCA_AV_SIZE;
102         profile[MTHCA_RES_UARC].size = request->uarc_size;
103
104         profile[MTHCA_RES_QP].num    = request->num_qp;
105         profile[MTHCA_RES_SRQ].num   = request->num_srq;
106         profile[MTHCA_RES_EQP].num   = request->num_qp;
107         profile[MTHCA_RES_RDB].num   = request->num_qp * request->rdb_per_qp;
108         profile[MTHCA_RES_CQ].num    = request->num_cq;
109         profile[MTHCA_RES_EQ].num    = MTHCA_NUM_EQS;
110         profile[MTHCA_RES_MCG].num   = request->num_mcg;
111         profile[MTHCA_RES_MPT].num   = request->num_mpt;
112         profile[MTHCA_RES_MTT].num   = request->num_mtt;
113         profile[MTHCA_RES_UAR].num   = request->num_uar;
114         profile[MTHCA_RES_UARC].num  = request->num_uar;
115         profile[MTHCA_RES_UDAV].num  = request->num_udav;
116
117         for (i = 0; i < MTHCA_RES_NUM; ++i) {
118                 profile[i].type     = i;
119                 profile[i].log_num  = max(ffs(profile[i].num) - 1, 0);
120                 profile[i].size    *= profile[i].num;
121                 if (mthca_is_memfree(dev))
122                         profile[i].size = max(profile[i].size, (u64) PAGE_SIZE);
123         }
124
125         if (mthca_is_memfree(dev)) {
126                 mem_base  = 0;
127                 mem_avail = dev_lim->hca.arbel.max_icm_sz;
128         } else {
129                 mem_base  = dev->ddr_start;
130                 mem_avail = dev->fw.tavor.fw_start - dev->ddr_start;
131         }
132
133         /*
134          * Sort the resources in decreasing order of size.  Since they
135          * all have sizes that are powers of 2, we'll be able to keep
136          * resources aligned to their size and pack them without gaps
137          * using the sorted order.
138          */
139         for (i = MTHCA_RES_NUM; i > 0; --i)
140                 for (j = 1; j < i; ++j) {
141                         if (profile[j].size > profile[j - 1].size) {
142                                 tmp            = profile[j];
143                                 profile[j]     = profile[j - 1];
144                                 profile[j - 1] = tmp;
145                         }
146                 }
147
148         for (i = 0; i < MTHCA_RES_NUM; ++i) {
149                 if (profile[i].size) {
150                         profile[i].start = mem_base + total_size;
151                         total_size      += profile[i].size;
152                 }
153                 if (total_size > mem_avail) {
154                         mthca_err(dev, "Profile requires 0x%llx bytes; "
155                                   "won't in 0x%llx bytes of context memory.\n",
156                                   (unsigned long long) total_size,
157                                   (unsigned long long) mem_avail);
158                         kfree(profile);
159                         return -ENOMEM;
160                 }
161
162                 if (profile[i].size)
163                         mthca_dbg(dev, "profile[%2d]--%2d/%2d @ 0x%16llx "
164                                   "(size 0x%8llx)\n",
165                                   i, profile[i].type, profile[i].log_num,
166                                   (unsigned long long) profile[i].start,
167                                   (unsigned long long) profile[i].size);
168         }
169
170         if (mthca_is_memfree(dev))
171                 mthca_dbg(dev, "HCA context memory: reserving %d KB\n",
172                           (int) (total_size >> 10));
173         else
174                 mthca_dbg(dev, "HCA memory: allocated %d KB/%d KB (%d KB free)\n",
175                           (int) (total_size >> 10), (int) (mem_avail >> 10),
176                           (int) ((mem_avail - total_size) >> 10));
177
178         for (i = 0; i < MTHCA_RES_NUM; ++i) {
179                 switch (profile[i].type) {
180                 case MTHCA_RES_QP:
181                         dev->limits.num_qps   = profile[i].num;
182                         init_hca->qpc_base    = profile[i].start;
183                         init_hca->log_num_qps = profile[i].log_num;
184                         break;
185                 case MTHCA_RES_EEC:
186                         dev->limits.num_eecs   = profile[i].num;
187                         init_hca->eec_base     = profile[i].start;
188                         init_hca->log_num_eecs = profile[i].log_num;
189                         break;
190                 case MTHCA_RES_SRQ:
191                         dev->limits.num_srqs   = profile[i].num;
192                         init_hca->srqc_base    = profile[i].start;
193                         init_hca->log_num_srqs = profile[i].log_num;
194                         break;
195                 case MTHCA_RES_CQ:
196                         dev->limits.num_cqs   = profile[i].num;
197                         init_hca->cqc_base    = profile[i].start;
198                         init_hca->log_num_cqs = profile[i].log_num;
199                         break;
200                 case MTHCA_RES_EQP:
201                         init_hca->eqpc_base = profile[i].start;
202                         break;
203                 case MTHCA_RES_EEEC:
204                         init_hca->eeec_base = profile[i].start;
205                         break;
206                 case MTHCA_RES_EQ:
207                         dev->limits.num_eqs   = profile[i].num;
208                         init_hca->eqc_base    = profile[i].start;
209                         init_hca->log_num_eqs = profile[i].log_num;
210                         break;
211                 case MTHCA_RES_RDB:
212                         for (dev->qp_table.rdb_shift = 0;
213                              request->num_qp << dev->qp_table.rdb_shift < profile[i].num;
214                              ++dev->qp_table.rdb_shift)
215                                 ; /* nothing */
216                         dev->qp_table.rdb_base    = (u32) profile[i].start;
217                         init_hca->rdb_base        = profile[i].start;
218                         break;
219                 case MTHCA_RES_MCG:
220                         dev->limits.num_mgms      = profile[i].num >> 1;
221                         dev->limits.num_amgms     = profile[i].num >> 1;
222                         init_hca->mc_base         = profile[i].start;
223                         init_hca->log_mc_entry_sz = ffs(MTHCA_MGM_ENTRY_SIZE) - 1;
224                         init_hca->log_mc_table_sz = profile[i].log_num;
225                         init_hca->mc_hash_sz      = 1 << (profile[i].log_num - 1);
226                         break;
227                 case MTHCA_RES_MPT:
228                         dev->limits.num_mpts   = profile[i].num;
229                         dev->mr_table.mpt_base = profile[i].start;
230                         init_hca->mpt_base     = profile[i].start;
231                         init_hca->log_mpt_sz   = profile[i].log_num;
232                         break;
233                 case MTHCA_RES_MTT:
234                         dev->limits.num_mtt_segs = profile[i].num;
235                         dev->mr_table.mtt_base   = profile[i].start;
236                         init_hca->mtt_base       = profile[i].start;
237                         init_hca->mtt_seg_sz     = ffs(MTHCA_MTT_SEG_SIZE) - 7;
238                         break;
239                 case MTHCA_RES_UAR:
240                         dev->limits.num_uars       = profile[i].num;
241                         init_hca->uar_scratch_base = profile[i].start;
242                         break;
243                 case MTHCA_RES_UDAV:
244                         dev->av_table.ddr_av_base = profile[i].start;
245                         dev->av_table.num_ddr_avs = profile[i].num;
246                         break;
247                 case MTHCA_RES_UARC:
248                         dev->uar_table.uarc_size = request->uarc_size;
249                         dev->uar_table.uarc_base = profile[i].start;
250                         init_hca->uarc_base      = profile[i].start;
251                         init_hca->log_uarc_sz    = ffs(request->uarc_size) - 13;
252                         init_hca->log_uar_sz     = ffs(request->num_uar) - 1;
253                         break;
254                 default:
255                         break;
256                 }
257         }
258
259         /*
260          * PDs don't take any HCA memory, but we assign them as part
261          * of the HCA profile anyway.
262          */
263         dev->limits.num_pds = MTHCA_NUM_PDS;
264
265         /*
266          * For Tavor, FMRs use ioremapped PCI memory. For 32 bit
267          * systems it may use too much vmalloc space to map all MTT
268          * memory, so we reserve some MTTs for FMR access, taking them
269          * out of the MR pool. They don't use additional memory, but
270          * we assign them as part of the HCA profile anyway.
271          */
272         if (mthca_is_memfree(dev))
273                 dev->limits.fmr_reserved_mtts = 0;
274         else
275                 dev->limits.fmr_reserved_mtts = request->fmr_reserved_mtts;
276
277         kfree(profile);
278         return total_size;
279 }