Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / drivers / infiniband / hw / ehca / ehca_hca.c
1 /*
2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
3  *
4  *  HCA query functions
5  *
6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
7  *           Christoph Raisch <raisch@de.ibm.com>
8  *
9  *  Copyright (c) 2005 IBM Corporation
10  *
11  *  All rights reserved.
12  *
13  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
14  *  BSD.
15  *
16  * OpenIB BSD License
17  *
18  * Redistribution and use in source and binary forms, with or without
19  * modification, are permitted provided that the following conditions are met:
20  *
21  * Redistributions of source code must retain the above copyright notice, this
22  * list of conditions and the following disclaimer.
23  *
24  * Redistributions in binary form must reproduce the above copyright notice,
25  * this list of conditions and the following disclaimer in the documentation
26  * and/or other materials
27  * provided with the distribution.
28  *
29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
30  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
33  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
36  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39  * POSSIBILITY OF SUCH DAMAGE.
40  */
41
42 #include "ehca_tools.h"
43 #include "ehca_iverbs.h"
44 #include "hcp_if.h"
45
46 int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
47 {
48         int i, ret = 0;
49         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
50                                               ib_device);
51         struct hipz_query_hca *rblock;
52
53         static const u32 cap_mapping[] = {
54                 IB_DEVICE_RESIZE_MAX_WR,      HCA_CAP_WQE_RESIZE,
55                 IB_DEVICE_BAD_PKEY_CNTR,      HCA_CAP_BAD_P_KEY_CTR,
56                 IB_DEVICE_BAD_QKEY_CNTR,      HCA_CAP_Q_KEY_VIOL_CTR,
57                 IB_DEVICE_RAW_MULTI,          HCA_CAP_RAW_PACKET_MCAST,
58                 IB_DEVICE_AUTO_PATH_MIG,      HCA_CAP_AUTO_PATH_MIG,
59                 IB_DEVICE_CHANGE_PHY_PORT,    HCA_CAP_SQD_RTS_PORT_CHANGE,
60                 IB_DEVICE_UD_AV_PORT_ENFORCE, HCA_CAP_AH_PORT_NR_CHECK,
61                 IB_DEVICE_CURR_QP_STATE_MOD,  HCA_CAP_CUR_QP_STATE_MOD,
62                 IB_DEVICE_SHUTDOWN_PORT,      HCA_CAP_SHUTDOWN_PORT,
63                 IB_DEVICE_INIT_TYPE,          HCA_CAP_INIT_TYPE,
64                 IB_DEVICE_PORT_ACTIVE_EVENT,  HCA_CAP_PORT_ACTIVE_EVENT,
65         };
66
67         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
68         if (!rblock) {
69                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
70                 return -ENOMEM;
71         }
72
73         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
74                 ehca_err(&shca->ib_device, "Can't query device properties");
75                 ret = -EINVAL;
76                 goto query_device1;
77         }
78
79         memset(props, 0, sizeof(struct ib_device_attr));
80         props->page_size_cap   = shca->hca_cap_mr_pgsize;
81         props->fw_ver          = rblock->hw_ver;
82         props->max_mr_size     = rblock->max_mr_size;
83         props->vendor_id       = rblock->vendor_id >> 8;
84         props->vendor_part_id  = rblock->vendor_part_id >> 16;
85         props->hw_ver          = rblock->hw_ver;
86         props->max_qp          = min_t(unsigned, rblock->max_qp, INT_MAX);
87         props->max_qp_wr       = min_t(unsigned, rblock->max_wqes_wq, INT_MAX);
88         props->max_sge         = min_t(unsigned, rblock->max_sge, INT_MAX);
89         props->max_sge_rd      = min_t(unsigned, rblock->max_sge_rd, INT_MAX);
90         props->max_cq          = min_t(unsigned, rblock->max_cq, INT_MAX);
91         props->max_cqe         = min_t(unsigned, rblock->max_cqe, INT_MAX);
92         props->max_mr          = min_t(unsigned, rblock->max_mr, INT_MAX);
93         props->max_mw          = min_t(unsigned, rblock->max_mw, INT_MAX);
94         props->max_pd          = min_t(unsigned, rblock->max_pd, INT_MAX);
95         props->max_ah          = min_t(unsigned, rblock->max_ah, INT_MAX);
96         props->max_fmr         = min_t(unsigned, rblock->max_mr, INT_MAX);
97
98         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
99                 props->max_srq         = props->max_qp;
100                 props->max_srq_wr      = props->max_qp_wr;
101                 props->max_srq_sge     = 3;
102         }
103
104         props->max_pkeys       = 16;
105         props->local_ca_ack_delay
106                 = rblock->local_ca_ack_delay;
107         props->max_raw_ipv6_qp
108                 = min_t(unsigned, rblock->max_raw_ipv6_qp, INT_MAX);
109         props->max_raw_ethy_qp
110                 = min_t(unsigned, rblock->max_raw_ethy_qp, INT_MAX);
111         props->max_mcast_grp
112                 = min_t(unsigned, rblock->max_mcast_grp, INT_MAX);
113         props->max_mcast_qp_attach
114                 = min_t(unsigned, rblock->max_mcast_qp_attach, INT_MAX);
115         props->max_total_mcast_qp_attach
116                 = min_t(unsigned, rblock->max_total_mcast_qp_attach, INT_MAX);
117
118         /* translate device capabilities */
119         props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |
120                 IB_DEVICE_RC_RNR_NAK_GEN | IB_DEVICE_N_NOTIFY_CQ;
121         for (i = 0; i < ARRAY_SIZE(cap_mapping); i += 2)
122                 if (rblock->hca_cap_indicators & cap_mapping[i + 1])
123                         props->device_cap_flags |= cap_mapping[i];
124
125 query_device1:
126         ehca_free_fw_ctrlblock(rblock);
127
128         return ret;
129 }
130
131 int ehca_query_port(struct ib_device *ibdev,
132                     u8 port, struct ib_port_attr *props)
133 {
134         int ret = 0;
135         u64 h_ret;
136         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
137                                               ib_device);
138         struct hipz_query_port *rblock;
139
140         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
141         if (!rblock) {
142                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
143                 return -ENOMEM;
144         }
145
146         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
147         if (h_ret != H_SUCCESS) {
148                 ehca_err(&shca->ib_device, "Can't query port properties");
149                 ret = -EINVAL;
150                 goto query_port1;
151         }
152
153         memset(props, 0, sizeof(struct ib_port_attr));
154         props->state = rblock->state;
155
156         switch (rblock->max_mtu) {
157         case 0x1:
158                 props->active_mtu = props->max_mtu = IB_MTU_256;
159                 break;
160         case 0x2:
161                 props->active_mtu = props->max_mtu = IB_MTU_512;
162                 break;
163         case 0x3:
164                 props->active_mtu = props->max_mtu = IB_MTU_1024;
165                 break;
166         case 0x4:
167                 props->active_mtu = props->max_mtu = IB_MTU_2048;
168                 break;
169         case 0x5:
170                 props->active_mtu = props->max_mtu = IB_MTU_4096;
171                 break;
172         default:
173                 ehca_err(&shca->ib_device, "Unknown MTU size: %x.",
174                          rblock->max_mtu);
175                 break;
176         }
177
178         props->port_cap_flags  = rblock->capability_mask;
179         props->gid_tbl_len     = rblock->gid_tbl_len;
180         props->max_msg_sz      = rblock->max_msg_sz;
181         props->bad_pkey_cntr   = rblock->bad_pkey_cntr;
182         props->qkey_viol_cntr  = rblock->qkey_viol_cntr;
183         props->pkey_tbl_len    = rblock->pkey_tbl_len;
184         props->lid             = rblock->lid;
185         props->sm_lid          = rblock->sm_lid;
186         props->lmc             = rblock->lmc;
187         props->sm_sl           = rblock->sm_sl;
188         props->subnet_timeout  = rblock->subnet_timeout;
189         props->init_type_reply = rblock->init_type_reply;
190
191         props->active_width    = IB_WIDTH_12X;
192         props->active_speed    = 0x1;
193
194         /* at the moment (logical) link state is always LINK_UP */
195         props->phys_state      = 0x5;
196
197 query_port1:
198         ehca_free_fw_ctrlblock(rblock);
199
200         return ret;
201 }
202
203 int ehca_query_sma_attr(struct ehca_shca *shca,
204                         u8 port, struct ehca_sma_attr *attr)
205 {
206         int ret = 0;
207         u64 h_ret;
208         struct hipz_query_port *rblock;
209
210         rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
211         if (!rblock) {
212                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
213                 return -ENOMEM;
214         }
215
216         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
217         if (h_ret != H_SUCCESS) {
218                 ehca_err(&shca->ib_device, "Can't query port properties");
219                 ret = -EINVAL;
220                 goto query_sma_attr1;
221         }
222
223         memset(attr, 0, sizeof(struct ehca_sma_attr));
224
225         attr->lid    = rblock->lid;
226         attr->lmc    = rblock->lmc;
227         attr->sm_sl  = rblock->sm_sl;
228         attr->sm_lid = rblock->sm_lid;
229
230         attr->pkey_tbl_len = rblock->pkey_tbl_len;
231         memcpy(attr->pkeys, rblock->pkey_entries, sizeof(attr->pkeys));
232
233 query_sma_attr1:
234         ehca_free_fw_ctrlblock(rblock);
235
236         return ret;
237 }
238
239 int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
240 {
241         int ret = 0;
242         u64 h_ret;
243         struct ehca_shca *shca;
244         struct hipz_query_port *rblock;
245
246         shca = container_of(ibdev, struct ehca_shca, ib_device);
247         if (index > 16) {
248                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
249                 return -EINVAL;
250         }
251
252         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
253         if (!rblock) {
254                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
255                 return -ENOMEM;
256         }
257
258         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
259         if (h_ret != H_SUCCESS) {
260                 ehca_err(&shca->ib_device, "Can't query port properties");
261                 ret = -EINVAL;
262                 goto query_pkey1;
263         }
264
265         memcpy(pkey, &rblock->pkey_entries + index, sizeof(u16));
266
267 query_pkey1:
268         ehca_free_fw_ctrlblock(rblock);
269
270         return ret;
271 }
272
273 int ehca_query_gid(struct ib_device *ibdev, u8 port,
274                    int index, union ib_gid *gid)
275 {
276         int ret = 0;
277         u64 h_ret;
278         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
279                                               ib_device);
280         struct hipz_query_port *rblock;
281
282         if (index > 255) {
283                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
284                 return -EINVAL;
285         }
286
287         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
288         if (!rblock) {
289                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
290                 return -ENOMEM;
291         }
292
293         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
294         if (h_ret != H_SUCCESS) {
295                 ehca_err(&shca->ib_device, "Can't query port properties");
296                 ret = -EINVAL;
297                 goto query_gid1;
298         }
299
300         memcpy(&gid->raw[0], &rblock->gid_prefix, sizeof(u64));
301         memcpy(&gid->raw[8], &rblock->guid_entries[index], sizeof(u64));
302
303 query_gid1:
304         ehca_free_fw_ctrlblock(rblock);
305
306         return ret;
307 }
308
309 const u32 allowed_port_caps = (
310         IB_PORT_SM | IB_PORT_LED_INFO_SUP | IB_PORT_CM_SUP |
311         IB_PORT_SNMP_TUNNEL_SUP | IB_PORT_DEVICE_MGMT_SUP |
312         IB_PORT_VENDOR_CLASS_SUP);
313
314 int ehca_modify_port(struct ib_device *ibdev,
315                      u8 port, int port_modify_mask,
316                      struct ib_port_modify *props)
317 {
318         int ret = 0;
319         struct ehca_shca *shca;
320         struct hipz_query_port *rblock;
321         u32 cap;
322         u64 hret;
323
324         shca = container_of(ibdev, struct ehca_shca, ib_device);
325         if ((props->set_port_cap_mask | props->clr_port_cap_mask)
326             & ~allowed_port_caps) {
327                 ehca_err(&shca->ib_device, "Non-changeable bits set in masks  "
328                          "set=%x  clr=%x  allowed=%x", props->set_port_cap_mask,
329                          props->clr_port_cap_mask, allowed_port_caps);
330                 return -EINVAL;
331         }
332
333         if (mutex_lock_interruptible(&shca->modify_mutex))
334                 return -ERESTARTSYS;
335
336         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
337         if (!rblock) {
338                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
339                 ret = -ENOMEM;
340                 goto modify_port1;
341         }
342
343         hret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
344         if (hret != H_SUCCESS) {
345                 ehca_err(&shca->ib_device, "Can't query port properties");
346                 ret = -EINVAL;
347                 goto modify_port2;
348         }
349
350         cap = (rblock->capability_mask | props->set_port_cap_mask)
351                 & ~props->clr_port_cap_mask;
352
353         hret = hipz_h_modify_port(shca->ipz_hca_handle, port,
354                                   cap, props->init_type, port_modify_mask);
355         if (hret != H_SUCCESS) {
356                 ehca_err(&shca->ib_device, "Modify port failed  h_ret=%li",
357                          hret);
358                 ret = -EINVAL;
359         }
360
361 modify_port2:
362         ehca_free_fw_ctrlblock(rblock);
363
364 modify_port1:
365         mutex_unlock(&shca->modify_mutex);
366
367         return ret;
368 }