Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[linux-3.10.git] / drivers / infiniband / hw / ehca / ehca_main.c
1 /*
2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
3  *
4  *  module start stop, hca detection
5  *
6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8  *           Joachim Fenkes <fenkes@de.ibm.com>
9  *
10  *  Copyright (c) 2005 IBM Corporation
11  *
12  *  All rights reserved.
13  *
14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
15  *  BSD.
16  *
17  * OpenIB BSD License
18  *
19  * Redistribution and use in source and binary forms, with or without
20  * modification, are permitted provided that the following conditions are met:
21  *
22  * Redistributions of source code must retain the above copyright notice, this
23  * list of conditions and the following disclaimer.
24  *
25  * Redistributions in binary form must reproduce the above copyright notice,
26  * this list of conditions and the following disclaimer in the documentation
27  * and/or other materials
28  * provided with the distribution.
29  *
30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40  * POSSIBILITY OF SUCH DAMAGE.
41  */
42
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
45 #endif
46 #include "ehca_classes.h"
47 #include "ehca_iverbs.h"
48 #include "ehca_mrmw.h"
49 #include "ehca_tools.h"
50 #include "hcp_if.h"
51
52 #define HCAD_VERSION "0024"
53
54 MODULE_LICENSE("Dual BSD/GPL");
55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
56 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
57 MODULE_VERSION(HCAD_VERSION);
58
59 int ehca_open_aqp1     = 0;
60 int ehca_debug_level   = 0;
61 int ehca_hw_level      = 0;
62 int ehca_nr_ports      = 2;
63 int ehca_use_hp_mr     = 0;
64 int ehca_port_act_time = 30;
65 int ehca_poll_all_eqs  = 1;
66 int ehca_static_rate   = -1;
67 int ehca_scaling_code  = 0;
68 int ehca_mr_largepage  = 1;
69
70 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
71 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
72 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
73 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
74 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
75 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
76 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
77 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
78 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
79 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
80
81 MODULE_PARM_DESC(open_aqp1,
82                  "AQP1 on startup (0: no (default), 1: yes)");
83 MODULE_PARM_DESC(debug_level,
84                  "debug level"
85                  " (0: no debug traces (default), 1: with debug traces)");
86 MODULE_PARM_DESC(hw_level,
87                  "hardware level"
88                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
89 MODULE_PARM_DESC(nr_ports,
90                  "number of connected ports (default: 2)");
91 MODULE_PARM_DESC(use_hp_mr,
92                  "high performance MRs (0: no (default), 1: yes)");
93 MODULE_PARM_DESC(port_act_time,
94                  "time to wait for port activation (default: 30 sec)");
95 MODULE_PARM_DESC(poll_all_eqs,
96                  "polls all event queues periodically"
97                  " (0: no, 1: yes (default))");
98 MODULE_PARM_DESC(static_rate,
99                  "set permanent static rate (default: disabled)");
100 MODULE_PARM_DESC(scaling_code,
101                  "set scaling code (0: disabled/default, 1: enabled)");
102 MODULE_PARM_DESC(mr_largepage,
103                  "use large page for MR (0: use PAGE_SIZE (default), "
104                  "1: use large page depending on MR size");
105
106 DEFINE_RWLOCK(ehca_qp_idr_lock);
107 DEFINE_RWLOCK(ehca_cq_idr_lock);
108 DEFINE_IDR(ehca_qp_idr);
109 DEFINE_IDR(ehca_cq_idr);
110
111 static LIST_HEAD(shca_list); /* list of all registered ehcas */
112 static DEFINE_SPINLOCK(shca_list_lock);
113
114 static struct timer_list poll_eqs_timer;
115
116 #ifdef CONFIG_PPC_64K_PAGES
117 static struct kmem_cache *ctblk_cache;
118
119 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
120 {
121         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
122         if (!ret)
123                 ehca_gen_err("Out of memory for ctblk");
124         return ret;
125 }
126
127 void ehca_free_fw_ctrlblock(void *ptr)
128 {
129         if (ptr)
130                 kmem_cache_free(ctblk_cache, ptr);
131
132 }
133 #endif
134
135 int ehca2ib_return_code(u64 ehca_rc)
136 {
137         switch (ehca_rc) {
138         case H_SUCCESS:
139                 return 0;
140         case H_RESOURCE:             /* Resource in use */
141         case H_BUSY:
142                 return -EBUSY;
143         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
144         case H_CONSTRAINED:          /* resource constraint */
145         case H_NO_MEM:
146                 return -ENOMEM;
147         default:
148                 return -EINVAL;
149         }
150 }
151
152 static int ehca_create_slab_caches(void)
153 {
154         int ret;
155
156         ret = ehca_init_pd_cache();
157         if (ret) {
158                 ehca_gen_err("Cannot create PD SLAB cache.");
159                 return ret;
160         }
161
162         ret = ehca_init_cq_cache();
163         if (ret) {
164                 ehca_gen_err("Cannot create CQ SLAB cache.");
165                 goto create_slab_caches2;
166         }
167
168         ret = ehca_init_qp_cache();
169         if (ret) {
170                 ehca_gen_err("Cannot create QP SLAB cache.");
171                 goto create_slab_caches3;
172         }
173
174         ret = ehca_init_av_cache();
175         if (ret) {
176                 ehca_gen_err("Cannot create AV SLAB cache.");
177                 goto create_slab_caches4;
178         }
179
180         ret = ehca_init_mrmw_cache();
181         if (ret) {
182                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
183                 goto create_slab_caches5;
184         }
185
186         ret = ehca_init_small_qp_cache();
187         if (ret) {
188                 ehca_gen_err("Cannot create small queue SLAB cache.");
189                 goto create_slab_caches6;
190         }
191
192 #ifdef CONFIG_PPC_64K_PAGES
193         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
194                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
195                                         SLAB_HWCACHE_ALIGN,
196                                         NULL);
197         if (!ctblk_cache) {
198                 ehca_gen_err("Cannot create ctblk SLAB cache.");
199                 ehca_cleanup_small_qp_cache();
200                 goto create_slab_caches6;
201         }
202 #endif
203         return 0;
204
205 create_slab_caches6:
206         ehca_cleanup_mrmw_cache();
207
208 create_slab_caches5:
209         ehca_cleanup_av_cache();
210
211 create_slab_caches4:
212         ehca_cleanup_qp_cache();
213
214 create_slab_caches3:
215         ehca_cleanup_cq_cache();
216
217 create_slab_caches2:
218         ehca_cleanup_pd_cache();
219
220         return ret;
221 }
222
223 static void ehca_destroy_slab_caches(void)
224 {
225         ehca_cleanup_small_qp_cache();
226         ehca_cleanup_mrmw_cache();
227         ehca_cleanup_av_cache();
228         ehca_cleanup_qp_cache();
229         ehca_cleanup_cq_cache();
230         ehca_cleanup_pd_cache();
231 #ifdef CONFIG_PPC_64K_PAGES
232         if (ctblk_cache)
233                 kmem_cache_destroy(ctblk_cache);
234 #endif
235 }
236
237 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
238 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
239
240 static struct cap_descr {
241         u64 mask;
242         char *descr;
243 } hca_cap_descr[] = {
244         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
245         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
246         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
247         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
248         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
249         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
250         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
251         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
252         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
253         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
254         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
255         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
256         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
257         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
258         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
259         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
260         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
261 };
262
263 static int ehca_sense_attributes(struct ehca_shca *shca)
264 {
265         int i, ret = 0;
266         u64 h_ret;
267         struct hipz_query_hca *rblock;
268         struct hipz_query_port *port;
269
270         static const u32 pgsize_map[] = {
271                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
272                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
273                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
274                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
275         };
276
277         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
278         if (!rblock) {
279                 ehca_gen_err("Cannot allocate rblock memory.");
280                 return -ENOMEM;
281         }
282
283         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
284         if (h_ret != H_SUCCESS) {
285                 ehca_gen_err("Cannot query device properties. h_ret=%li",
286                              h_ret);
287                 ret = -EPERM;
288                 goto sense_attributes1;
289         }
290
291         if (ehca_nr_ports == 1)
292                 shca->num_ports = 1;
293         else
294                 shca->num_ports = (u8)rblock->num_ports;
295
296         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
297
298         if (ehca_hw_level == 0) {
299                 u32 hcaaver;
300                 u32 revid;
301
302                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
303                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
304
305                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
306
307                 if (hcaaver == 1) {
308                         if (revid <= 3)
309                                 shca->hw_level = 0x10 | (revid + 1);
310                         else
311                                 shca->hw_level = 0x14;
312                 } else if (hcaaver == 2) {
313                         if (revid == 0)
314                                 shca->hw_level = 0x21;
315                         else if (revid == 0x10)
316                                 shca->hw_level = 0x22;
317                         else if (revid == 0x20 || revid == 0x21)
318                                 shca->hw_level = 0x23;
319                 }
320
321                 if (!shca->hw_level) {
322                         ehca_gen_warn("unknown hardware version"
323                                       " - assuming default level");
324                         shca->hw_level = 0x22;
325                 }
326         } else
327                 shca->hw_level = ehca_hw_level;
328         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
329
330         shca->sport[0].rate = IB_RATE_30_GBPS;
331         shca->sport[1].rate = IB_RATE_30_GBPS;
332
333         shca->hca_cap = rblock->hca_cap_indicators;
334         ehca_gen_dbg(" ... HCA capabilities:");
335         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
336                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
337                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
338
339         /* translate supported MR page sizes; always support 4K */
340         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
341         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
342                 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
343                         if (rblock->memory_page_size_supported & pgsize_map[i])
344                                 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
345         }
346
347         /* query max MTU from first port -- it's the same for all ports */
348         port = (struct hipz_query_port *)rblock;
349         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
350         if (h_ret != H_SUCCESS) {
351                 ehca_gen_err("Cannot query port properties. h_ret=%li",
352                              h_ret);
353                 ret = -EPERM;
354                 goto sense_attributes1;
355         }
356
357         shca->max_mtu = port->max_mtu;
358
359 sense_attributes1:
360         ehca_free_fw_ctrlblock(rblock);
361         return ret;
362 }
363
364 static int init_node_guid(struct ehca_shca *shca)
365 {
366         int ret = 0;
367         struct hipz_query_hca *rblock;
368
369         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
370         if (!rblock) {
371                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
372                 return -ENOMEM;
373         }
374
375         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
376                 ehca_err(&shca->ib_device, "Can't query device properties");
377                 ret = -EINVAL;
378                 goto init_node_guid1;
379         }
380
381         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
382
383 init_node_guid1:
384         ehca_free_fw_ctrlblock(rblock);
385         return ret;
386 }
387
388 int ehca_init_device(struct ehca_shca *shca)
389 {
390         int ret;
391
392         ret = init_node_guid(shca);
393         if (ret)
394                 return ret;
395
396         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
397         shca->ib_device.owner               = THIS_MODULE;
398
399         shca->ib_device.uverbs_abi_ver      = 8;
400         shca->ib_device.uverbs_cmd_mask     =
401                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
402                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
403                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
404                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
405                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
406                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
407                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
408                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
409                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
410                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
411                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
412                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
413                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
414                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
415                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
416                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
417
418         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
419         shca->ib_device.phys_port_cnt       = shca->num_ports;
420         shca->ib_device.num_comp_vectors    = 1;
421         shca->ib_device.dma_device          = &shca->ofdev->dev;
422         shca->ib_device.query_device        = ehca_query_device;
423         shca->ib_device.query_port          = ehca_query_port;
424         shca->ib_device.query_gid           = ehca_query_gid;
425         shca->ib_device.query_pkey          = ehca_query_pkey;
426         /* shca->in_device.modify_device    = ehca_modify_device    */
427         shca->ib_device.modify_port         = ehca_modify_port;
428         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
429         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
430         shca->ib_device.alloc_pd            = ehca_alloc_pd;
431         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
432         shca->ib_device.create_ah           = ehca_create_ah;
433         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
434         shca->ib_device.query_ah            = ehca_query_ah;
435         shca->ib_device.destroy_ah          = ehca_destroy_ah;
436         shca->ib_device.create_qp           = ehca_create_qp;
437         shca->ib_device.modify_qp           = ehca_modify_qp;
438         shca->ib_device.query_qp            = ehca_query_qp;
439         shca->ib_device.destroy_qp          = ehca_destroy_qp;
440         shca->ib_device.post_send           = ehca_post_send;
441         shca->ib_device.post_recv           = ehca_post_recv;
442         shca->ib_device.create_cq           = ehca_create_cq;
443         shca->ib_device.destroy_cq          = ehca_destroy_cq;
444         shca->ib_device.resize_cq           = ehca_resize_cq;
445         shca->ib_device.poll_cq             = ehca_poll_cq;
446         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
447         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
448         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
449         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
450         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
451         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
452         shca->ib_device.query_mr            = ehca_query_mr;
453         shca->ib_device.dereg_mr            = ehca_dereg_mr;
454         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
455         shca->ib_device.alloc_mw            = ehca_alloc_mw;
456         shca->ib_device.bind_mw             = ehca_bind_mw;
457         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
458         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
459         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
460         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
461         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
462         shca->ib_device.attach_mcast        = ehca_attach_mcast;
463         shca->ib_device.detach_mcast        = ehca_detach_mcast;
464         /* shca->ib_device.process_mad      = ehca_process_mad;     */
465         shca->ib_device.mmap                = ehca_mmap;
466
467         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
468                 shca->ib_device.uverbs_cmd_mask |=
469                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
470                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
471                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
472                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
473
474                 shca->ib_device.create_srq          = ehca_create_srq;
475                 shca->ib_device.modify_srq          = ehca_modify_srq;
476                 shca->ib_device.query_srq           = ehca_query_srq;
477                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
478                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
479         }
480
481         return ret;
482 }
483
484 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
485 {
486         struct ehca_sport *sport = &shca->sport[port - 1];
487         struct ib_cq *ibcq;
488         struct ib_qp *ibqp;
489         struct ib_qp_init_attr qp_init_attr;
490         int ret;
491
492         if (sport->ibcq_aqp1) {
493                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
494                 return -EPERM;
495         }
496
497         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
498         if (IS_ERR(ibcq)) {
499                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
500                 return PTR_ERR(ibcq);
501         }
502         sport->ibcq_aqp1 = ibcq;
503
504         if (sport->ibqp_aqp1) {
505                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
506                 ret = -EPERM;
507                 goto create_aqp1;
508         }
509
510         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
511         qp_init_attr.send_cq          = ibcq;
512         qp_init_attr.recv_cq          = ibcq;
513         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
514         qp_init_attr.cap.max_send_wr  = 100;
515         qp_init_attr.cap.max_recv_wr  = 100;
516         qp_init_attr.cap.max_send_sge = 2;
517         qp_init_attr.cap.max_recv_sge = 1;
518         qp_init_attr.qp_type          = IB_QPT_GSI;
519         qp_init_attr.port_num         = port;
520         qp_init_attr.qp_context       = NULL;
521         qp_init_attr.event_handler    = NULL;
522         qp_init_attr.srq              = NULL;
523
524         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
525         if (IS_ERR(ibqp)) {
526                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
527                 ret = PTR_ERR(ibqp);
528                 goto create_aqp1;
529         }
530         sport->ibqp_aqp1 = ibqp;
531
532         return 0;
533
534 create_aqp1:
535         ib_destroy_cq(sport->ibcq_aqp1);
536         return ret;
537 }
538
539 static int ehca_destroy_aqp1(struct ehca_sport *sport)
540 {
541         int ret;
542
543         ret = ib_destroy_qp(sport->ibqp_aqp1);
544         if (ret) {
545                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
546                 return ret;
547         }
548
549         ret = ib_destroy_cq(sport->ibcq_aqp1);
550         if (ret)
551                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
552
553         return ret;
554 }
555
556 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
557 {
558         return snprintf(buf, PAGE_SIZE, "%d\n",
559                         ehca_debug_level);
560 }
561
562 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
563                                       const char *buf, size_t count)
564 {
565         int value = (*buf) - '0';
566         if (value >= 0 && value <= 9)
567                 ehca_debug_level = value;
568         return 1;
569 }
570
571 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
572             ehca_show_debug_level, ehca_store_debug_level);
573
574 static struct attribute *ehca_drv_attrs[] = {
575         &driver_attr_debug_level.attr,
576         NULL
577 };
578
579 static struct attribute_group ehca_drv_attr_grp = {
580         .attrs = ehca_drv_attrs
581 };
582
583 #define EHCA_RESOURCE_ATTR(name)                                           \
584 static ssize_t  ehca_show_##name(struct device *dev,                       \
585                                  struct device_attribute *attr,            \
586                                  char *buf)                                \
587 {                                                                          \
588         struct ehca_shca *shca;                                            \
589         struct hipz_query_hca *rblock;                                     \
590         int data;                                                          \
591                                                                            \
592         shca = dev->driver_data;                                           \
593                                                                            \
594         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
595         if (!rblock) {                                                     \
596                 dev_err(dev, "Can't allocate rblock memory.\n");           \
597                 return 0;                                                  \
598         }                                                                  \
599                                                                            \
600         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
601                 dev_err(dev, "Can't query device properties\n");           \
602                 ehca_free_fw_ctrlblock(rblock);                            \
603                 return 0;                                                  \
604         }                                                                  \
605                                                                            \
606         data = rblock->name;                                               \
607         ehca_free_fw_ctrlblock(rblock);                                    \
608                                                                            \
609         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
610                 return snprintf(buf, 256, "1\n");                          \
611         else                                                               \
612                 return snprintf(buf, 256, "%d\n", data);                   \
613                                                                            \
614 }                                                                          \
615 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
616
617 EHCA_RESOURCE_ATTR(num_ports);
618 EHCA_RESOURCE_ATTR(hw_ver);
619 EHCA_RESOURCE_ATTR(max_eq);
620 EHCA_RESOURCE_ATTR(cur_eq);
621 EHCA_RESOURCE_ATTR(max_cq);
622 EHCA_RESOURCE_ATTR(cur_cq);
623 EHCA_RESOURCE_ATTR(max_qp);
624 EHCA_RESOURCE_ATTR(cur_qp);
625 EHCA_RESOURCE_ATTR(max_mr);
626 EHCA_RESOURCE_ATTR(cur_mr);
627 EHCA_RESOURCE_ATTR(max_mw);
628 EHCA_RESOURCE_ATTR(cur_mw);
629 EHCA_RESOURCE_ATTR(max_pd);
630 EHCA_RESOURCE_ATTR(max_ah);
631
632 static ssize_t ehca_show_adapter_handle(struct device *dev,
633                                         struct device_attribute *attr,
634                                         char *buf)
635 {
636         struct ehca_shca *shca = dev->driver_data;
637
638         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
639
640 }
641 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
642
643 static ssize_t ehca_show_mr_largepage(struct device *dev,
644                                       struct device_attribute *attr,
645                                       char *buf)
646 {
647         return sprintf(buf, "%d\n", ehca_mr_largepage);
648 }
649 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
650
651 static struct attribute *ehca_dev_attrs[] = {
652         &dev_attr_adapter_handle.attr,
653         &dev_attr_num_ports.attr,
654         &dev_attr_hw_ver.attr,
655         &dev_attr_max_eq.attr,
656         &dev_attr_cur_eq.attr,
657         &dev_attr_max_cq.attr,
658         &dev_attr_cur_cq.attr,
659         &dev_attr_max_qp.attr,
660         &dev_attr_cur_qp.attr,
661         &dev_attr_max_mr.attr,
662         &dev_attr_cur_mr.attr,
663         &dev_attr_max_mw.attr,
664         &dev_attr_cur_mw.attr,
665         &dev_attr_max_pd.attr,
666         &dev_attr_max_ah.attr,
667         &dev_attr_mr_largepage.attr,
668         NULL
669 };
670
671 static struct attribute_group ehca_dev_attr_grp = {
672         .attrs = ehca_dev_attrs
673 };
674
675 static int __devinit ehca_probe(struct of_device *dev,
676                                 const struct of_device_id *id)
677 {
678         struct ehca_shca *shca;
679         const u64 *handle;
680         struct ib_pd *ibpd;
681         int ret;
682
683         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
684         if (!handle) {
685                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
686                              dev->node->full_name);
687                 return -ENODEV;
688         }
689
690         if (!(*handle)) {
691                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
692                              dev->node->full_name);
693                 return -ENODEV;
694         }
695
696         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
697         if (!shca) {
698                 ehca_gen_err("Cannot allocate shca memory.");
699                 return -ENOMEM;
700         }
701         mutex_init(&shca->modify_mutex);
702
703         shca->ofdev = dev;
704         shca->ipz_hca_handle.handle = *handle;
705         dev->dev.driver_data = shca;
706
707         ret = ehca_sense_attributes(shca);
708         if (ret < 0) {
709                 ehca_gen_err("Cannot sense eHCA attributes.");
710                 goto probe1;
711         }
712
713         ret = ehca_init_device(shca);
714         if (ret) {
715                 ehca_gen_err("Cannot init ehca  device struct");
716                 goto probe1;
717         }
718
719         /* create event queues */
720         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
721         if (ret) {
722                 ehca_err(&shca->ib_device, "Cannot create EQ.");
723                 goto probe1;
724         }
725
726         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
727         if (ret) {
728                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
729                 goto probe3;
730         }
731
732         /* create internal protection domain */
733         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
734         if (IS_ERR(ibpd)) {
735                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
736                 ret = PTR_ERR(ibpd);
737                 goto probe4;
738         }
739
740         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
741         shca->pd->ib_pd.device = &shca->ib_device;
742
743         /* create internal max MR */
744         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
745
746         if (ret) {
747                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
748                          ret);
749                 goto probe5;
750         }
751
752         ret = ib_register_device(&shca->ib_device);
753         if (ret) {
754                 ehca_err(&shca->ib_device,
755                          "ib_register_device() failed ret=%i", ret);
756                 goto probe6;
757         }
758
759         /* create AQP1 for port 1 */
760         if (ehca_open_aqp1 == 1) {
761                 shca->sport[0].port_state = IB_PORT_DOWN;
762                 ret = ehca_create_aqp1(shca, 1);
763                 if (ret) {
764                         ehca_err(&shca->ib_device,
765                                  "Cannot create AQP1 for port 1.");
766                         goto probe7;
767                 }
768         }
769
770         /* create AQP1 for port 2 */
771         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
772                 shca->sport[1].port_state = IB_PORT_DOWN;
773                 ret = ehca_create_aqp1(shca, 2);
774                 if (ret) {
775                         ehca_err(&shca->ib_device,
776                                  "Cannot create AQP1 for port 2.");
777                         goto probe8;
778                 }
779         }
780
781         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
782         if (ret) /* only complain; we can live without attributes */
783                 ehca_err(&shca->ib_device,
784                          "Cannot create device attributes  ret=%d", ret);
785
786         spin_lock(&shca_list_lock);
787         list_add(&shca->shca_list, &shca_list);
788         spin_unlock(&shca_list_lock);
789
790         return 0;
791
792 probe8:
793         ret = ehca_destroy_aqp1(&shca->sport[0]);
794         if (ret)
795                 ehca_err(&shca->ib_device,
796                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
797
798 probe7:
799         ib_unregister_device(&shca->ib_device);
800
801 probe6:
802         ret = ehca_dereg_internal_maxmr(shca);
803         if (ret)
804                 ehca_err(&shca->ib_device,
805                          "Cannot destroy internal MR. ret=%x", ret);
806
807 probe5:
808         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
809         if (ret)
810                 ehca_err(&shca->ib_device,
811                          "Cannot destroy internal PD. ret=%x", ret);
812
813 probe4:
814         ret = ehca_destroy_eq(shca, &shca->neq);
815         if (ret)
816                 ehca_err(&shca->ib_device,
817                          "Cannot destroy NEQ. ret=%x", ret);
818
819 probe3:
820         ret = ehca_destroy_eq(shca, &shca->eq);
821         if (ret)
822                 ehca_err(&shca->ib_device,
823                          "Cannot destroy EQ. ret=%x", ret);
824
825 probe1:
826         ib_dealloc_device(&shca->ib_device);
827
828         return -EINVAL;
829 }
830
831 static int __devexit ehca_remove(struct of_device *dev)
832 {
833         struct ehca_shca *shca = dev->dev.driver_data;
834         int ret;
835
836         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
837
838         if (ehca_open_aqp1 == 1) {
839                 int i;
840                 for (i = 0; i < shca->num_ports; i++) {
841                         ret = ehca_destroy_aqp1(&shca->sport[i]);
842                         if (ret)
843                                 ehca_err(&shca->ib_device,
844                                          "Cannot destroy AQP1 for port %x "
845                                          "ret=%i", ret, i);
846                 }
847         }
848
849         ib_unregister_device(&shca->ib_device);
850
851         ret = ehca_dereg_internal_maxmr(shca);
852         if (ret)
853                 ehca_err(&shca->ib_device,
854                          "Cannot destroy internal MR. ret=%i", ret);
855
856         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
857         if (ret)
858                 ehca_err(&shca->ib_device,
859                          "Cannot destroy internal PD. ret=%i", ret);
860
861         ret = ehca_destroy_eq(shca, &shca->eq);
862         if (ret)
863                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
864
865         ret = ehca_destroy_eq(shca, &shca->neq);
866         if (ret)
867                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
868
869         ib_dealloc_device(&shca->ib_device);
870
871         spin_lock(&shca_list_lock);
872         list_del(&shca->shca_list);
873         spin_unlock(&shca_list_lock);
874
875         return ret;
876 }
877
878 static struct of_device_id ehca_device_table[] =
879 {
880         {
881                 .name       = "lhca",
882                 .compatible = "IBM,lhca",
883         },
884         {},
885 };
886
887 static struct of_platform_driver ehca_driver = {
888         .name        = "ehca",
889         .match_table = ehca_device_table,
890         .probe       = ehca_probe,
891         .remove      = ehca_remove,
892 };
893
894 void ehca_poll_eqs(unsigned long data)
895 {
896         struct ehca_shca *shca;
897
898         spin_lock(&shca_list_lock);
899         list_for_each_entry(shca, &shca_list, shca_list) {
900                 if (shca->eq.is_initialized) {
901                         /* call deadman proc only if eq ptr does not change */
902                         struct ehca_eq *eq = &shca->eq;
903                         int max = 3;
904                         volatile u64 q_ofs, q_ofs2;
905                         u64 flags;
906                         spin_lock_irqsave(&eq->spinlock, flags);
907                         q_ofs = eq->ipz_queue.current_q_offset;
908                         spin_unlock_irqrestore(&eq->spinlock, flags);
909                         do {
910                                 spin_lock_irqsave(&eq->spinlock, flags);
911                                 q_ofs2 = eq->ipz_queue.current_q_offset;
912                                 spin_unlock_irqrestore(&eq->spinlock, flags);
913                                 max--;
914                         } while (q_ofs == q_ofs2 && max > 0);
915                         if (q_ofs == q_ofs2)
916                                 ehca_process_eq(shca, 0);
917                 }
918         }
919         mod_timer(&poll_eqs_timer, jiffies + HZ);
920         spin_unlock(&shca_list_lock);
921 }
922
923 int __init ehca_module_init(void)
924 {
925         int ret;
926
927         printk(KERN_INFO "eHCA Infiniband Device Driver "
928                "(Version " HCAD_VERSION ")\n");
929
930         ret = ehca_create_comp_pool();
931         if (ret) {
932                 ehca_gen_err("Cannot create comp pool.");
933                 return ret;
934         }
935
936         ret = ehca_create_slab_caches();
937         if (ret) {
938                 ehca_gen_err("Cannot create SLAB caches");
939                 ret = -ENOMEM;
940                 goto module_init1;
941         }
942
943         ret = ibmebus_register_driver(&ehca_driver);
944         if (ret) {
945                 ehca_gen_err("Cannot register eHCA device driver");
946                 ret = -EINVAL;
947                 goto module_init2;
948         }
949
950         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
951         if (ret) /* only complain; we can live without attributes */
952                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
953
954         if (ehca_poll_all_eqs != 1) {
955                 ehca_gen_err("WARNING!!!");
956                 ehca_gen_err("It is possible to lose interrupts.");
957         } else {
958                 init_timer(&poll_eqs_timer);
959                 poll_eqs_timer.function = ehca_poll_eqs;
960                 poll_eqs_timer.expires = jiffies + HZ;
961                 add_timer(&poll_eqs_timer);
962         }
963
964         return 0;
965
966 module_init2:
967         ehca_destroy_slab_caches();
968
969 module_init1:
970         ehca_destroy_comp_pool();
971         return ret;
972 };
973
974 void __exit ehca_module_exit(void)
975 {
976         if (ehca_poll_all_eqs == 1)
977                 del_timer_sync(&poll_eqs_timer);
978
979         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
980         ibmebus_unregister_driver(&ehca_driver);
981
982         ehca_destroy_slab_caches();
983
984         ehca_destroy_comp_pool();
985
986         idr_destroy(&ehca_cq_idr);
987         idr_destroy(&ehca_qp_idr);
988 };
989
990 module_init(ehca_module_init);
991 module_exit(ehca_module_exit);