IB/ehca: Change scaling_code parameter description to match default value
[linux-2.6] / 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 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
55 MODULE_VERSION("SVNEHCA_0023");
56
57 int ehca_open_aqp1     = 0;
58 int ehca_debug_level   = 0;
59 int ehca_hw_level      = 0;
60 int ehca_nr_ports      = 2;
61 int ehca_use_hp_mr     = 0;
62 int ehca_port_act_time = 30;
63 int ehca_poll_all_eqs  = 1;
64 int ehca_static_rate   = -1;
65 int ehca_scaling_code  = 0;
66
67 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
68 module_param_named(debug_level,   ehca_debug_level,   int, 0);
69 module_param_named(hw_level,      ehca_hw_level,      int, 0);
70 module_param_named(nr_ports,      ehca_nr_ports,      int, 0);
71 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
73 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
74 module_param_named(static_rate,   ehca_static_rate,   int, 0);
75 module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
76
77 MODULE_PARM_DESC(open_aqp1,
78                  "AQP1 on startup (0: no (default), 1: yes)");
79 MODULE_PARM_DESC(debug_level,
80                  "debug level"
81                  " (0: no debug traces (default), 1: with debug traces)");
82 MODULE_PARM_DESC(hw_level,
83                  "hardware level"
84                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
85 MODULE_PARM_DESC(nr_ports,
86                  "number of connected ports (default: 2)");
87 MODULE_PARM_DESC(use_hp_mr,
88                  "high performance MRs (0: no (default), 1: yes)");
89 MODULE_PARM_DESC(port_act_time,
90                  "time to wait for port activation (default: 30 sec)");
91 MODULE_PARM_DESC(poll_all_eqs,
92                  "polls all event queues periodically"
93                  " (0: no, 1: yes (default))");
94 MODULE_PARM_DESC(static_rate,
95                  "set permanent static rate (default: disabled)");
96 MODULE_PARM_DESC(scaling_code,
97                  "set scaling code (0: disabled/default, 1: enabled)");
98
99 spinlock_t ehca_qp_idr_lock;
100 spinlock_t ehca_cq_idr_lock;
101 spinlock_t hcall_lock;
102 DEFINE_IDR(ehca_qp_idr);
103 DEFINE_IDR(ehca_cq_idr);
104
105
106 static struct list_head shca_list; /* list of all registered ehcas */
107 static spinlock_t shca_list_lock;
108
109 static struct timer_list poll_eqs_timer;
110
111 #ifdef CONFIG_PPC_64K_PAGES
112 static struct kmem_cache *ctblk_cache = NULL;
113
114 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
115 {
116         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
117         if (!ret)
118                 ehca_gen_err("Out of memory for ctblk");
119         return ret;
120 }
121
122 void ehca_free_fw_ctrlblock(void *ptr)
123 {
124         if (ptr)
125                 kmem_cache_free(ctblk_cache, ptr);
126
127 }
128 #endif
129
130 static int ehca_create_slab_caches(void)
131 {
132         int ret;
133
134         ret = ehca_init_pd_cache();
135         if (ret) {
136                 ehca_gen_err("Cannot create PD SLAB cache.");
137                 return ret;
138         }
139
140         ret = ehca_init_cq_cache();
141         if (ret) {
142                 ehca_gen_err("Cannot create CQ SLAB cache.");
143                 goto create_slab_caches2;
144         }
145
146         ret = ehca_init_qp_cache();
147         if (ret) {
148                 ehca_gen_err("Cannot create QP SLAB cache.");
149                 goto create_slab_caches3;
150         }
151
152         ret = ehca_init_av_cache();
153         if (ret) {
154                 ehca_gen_err("Cannot create AV SLAB cache.");
155                 goto create_slab_caches4;
156         }
157
158         ret = ehca_init_mrmw_cache();
159         if (ret) {
160                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
161                 goto create_slab_caches5;
162         }
163
164 #ifdef CONFIG_PPC_64K_PAGES
165         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
166                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
167                                         SLAB_HWCACHE_ALIGN,
168                                         NULL, NULL);
169         if (!ctblk_cache) {
170                 ehca_gen_err("Cannot create ctblk SLAB cache.");
171                 ehca_cleanup_mrmw_cache();
172                 goto create_slab_caches5;
173         }
174 #endif
175         return 0;
176
177 create_slab_caches5:
178         ehca_cleanup_av_cache();
179
180 create_slab_caches4:
181         ehca_cleanup_qp_cache();
182
183 create_slab_caches3:
184         ehca_cleanup_cq_cache();
185
186 create_slab_caches2:
187         ehca_cleanup_pd_cache();
188
189         return ret;
190 }
191
192 static void ehca_destroy_slab_caches(void)
193 {
194         ehca_cleanup_mrmw_cache();
195         ehca_cleanup_av_cache();
196         ehca_cleanup_qp_cache();
197         ehca_cleanup_cq_cache();
198         ehca_cleanup_pd_cache();
199 #ifdef CONFIG_PPC_64K_PAGES
200         if (ctblk_cache)
201                 kmem_cache_destroy(ctblk_cache);
202 #endif
203 }
204
205 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
206 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
207
208 int ehca_sense_attributes(struct ehca_shca *shca)
209 {
210         int ret = 0;
211         u64 h_ret;
212         struct hipz_query_hca *rblock;
213
214         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
215         if (!rblock) {
216                 ehca_gen_err("Cannot allocate rblock memory.");
217                 return -ENOMEM;
218         }
219
220         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
221         if (h_ret != H_SUCCESS) {
222                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
223                              h_ret);
224                 ret = -EPERM;
225                 goto num_ports1;
226         }
227
228         if (ehca_nr_ports == 1)
229                 shca->num_ports = 1;
230         else
231                 shca->num_ports = (u8)rblock->num_ports;
232
233         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
234
235         if (ehca_hw_level == 0) {
236                 u32 hcaaver;
237                 u32 revid;
238
239                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
240                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
241
242                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
243
244                 if ((hcaaver == 1) && (revid == 0))
245                         shca->hw_level = 0;
246                 else if ((hcaaver == 1) && (revid == 1))
247                         shca->hw_level = 1;
248                 else if ((hcaaver == 1) && (revid == 2))
249                         shca->hw_level = 2;
250         }
251         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
252
253         shca->sport[0].rate = IB_RATE_30_GBPS;
254         shca->sport[1].rate = IB_RATE_30_GBPS;
255
256 num_ports1:
257         ehca_free_fw_ctrlblock(rblock);
258         return ret;
259 }
260
261 static int init_node_guid(struct ehca_shca *shca)
262 {
263         int ret = 0;
264         struct hipz_query_hca *rblock;
265
266         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
267         if (!rblock) {
268                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
269                 return -ENOMEM;
270         }
271
272         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
273                 ehca_err(&shca->ib_device, "Can't query device properties");
274                 ret = -EINVAL;
275                 goto init_node_guid1;
276         }
277
278         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
279
280 init_node_guid1:
281         ehca_free_fw_ctrlblock(rblock);
282         return ret;
283 }
284
285 int ehca_init_device(struct ehca_shca *shca)
286 {
287         int ret;
288
289         ret = init_node_guid(shca);
290         if (ret)
291                 return ret;
292
293         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
294         shca->ib_device.owner               = THIS_MODULE;
295
296         shca->ib_device.uverbs_abi_ver      = 6;
297         shca->ib_device.uverbs_cmd_mask     =
298                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
299                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
300                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
301                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
302                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
303                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
304                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
305                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
306                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
307                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
308                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
309                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
310                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
311                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
312                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
313                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
314
315         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
316         shca->ib_device.phys_port_cnt       = shca->num_ports;
317         shca->ib_device.num_comp_vectors    = 1;
318         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
319         shca->ib_device.query_device        = ehca_query_device;
320         shca->ib_device.query_port          = ehca_query_port;
321         shca->ib_device.query_gid           = ehca_query_gid;
322         shca->ib_device.query_pkey          = ehca_query_pkey;
323         /* shca->in_device.modify_device    = ehca_modify_device    */
324         shca->ib_device.modify_port         = ehca_modify_port;
325         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
326         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
327         shca->ib_device.alloc_pd            = ehca_alloc_pd;
328         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
329         shca->ib_device.create_ah           = ehca_create_ah;
330         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
331         shca->ib_device.query_ah            = ehca_query_ah;
332         shca->ib_device.destroy_ah          = ehca_destroy_ah;
333         shca->ib_device.create_qp           = ehca_create_qp;
334         shca->ib_device.modify_qp           = ehca_modify_qp;
335         shca->ib_device.query_qp            = ehca_query_qp;
336         shca->ib_device.destroy_qp          = ehca_destroy_qp;
337         shca->ib_device.post_send           = ehca_post_send;
338         shca->ib_device.post_recv           = ehca_post_recv;
339         shca->ib_device.create_cq           = ehca_create_cq;
340         shca->ib_device.destroy_cq          = ehca_destroy_cq;
341         shca->ib_device.resize_cq           = ehca_resize_cq;
342         shca->ib_device.poll_cq             = ehca_poll_cq;
343         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
344         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
345         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
346         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
347         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
348         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
349         shca->ib_device.query_mr            = ehca_query_mr;
350         shca->ib_device.dereg_mr            = ehca_dereg_mr;
351         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
352         shca->ib_device.alloc_mw            = ehca_alloc_mw;
353         shca->ib_device.bind_mw             = ehca_bind_mw;
354         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
355         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
356         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
357         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
358         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
359         shca->ib_device.attach_mcast        = ehca_attach_mcast;
360         shca->ib_device.detach_mcast        = ehca_detach_mcast;
361         /* shca->ib_device.process_mad      = ehca_process_mad;     */
362         shca->ib_device.mmap                = ehca_mmap;
363
364         return ret;
365 }
366
367 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
368 {
369         struct ehca_sport *sport = &shca->sport[port - 1];
370         struct ib_cq *ibcq;
371         struct ib_qp *ibqp;
372         struct ib_qp_init_attr qp_init_attr;
373         int ret;
374
375         if (sport->ibcq_aqp1) {
376                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
377                 return -EPERM;
378         }
379
380         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
381         if (IS_ERR(ibcq)) {
382                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
383                 return PTR_ERR(ibcq);
384         }
385         sport->ibcq_aqp1 = ibcq;
386
387         if (sport->ibqp_aqp1) {
388                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
389                 ret = -EPERM;
390                 goto create_aqp1;
391         }
392
393         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
394         qp_init_attr.send_cq          = ibcq;
395         qp_init_attr.recv_cq          = ibcq;
396         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
397         qp_init_attr.cap.max_send_wr  = 100;
398         qp_init_attr.cap.max_recv_wr  = 100;
399         qp_init_attr.cap.max_send_sge = 2;
400         qp_init_attr.cap.max_recv_sge = 1;
401         qp_init_attr.qp_type          = IB_QPT_GSI;
402         qp_init_attr.port_num         = port;
403         qp_init_attr.qp_context       = NULL;
404         qp_init_attr.event_handler    = NULL;
405         qp_init_attr.srq              = NULL;
406
407         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
408         if (IS_ERR(ibqp)) {
409                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
410                 ret = PTR_ERR(ibqp);
411                 goto create_aqp1;
412         }
413         sport->ibqp_aqp1 = ibqp;
414
415         return 0;
416
417 create_aqp1:
418         ib_destroy_cq(sport->ibcq_aqp1);
419         return ret;
420 }
421
422 static int ehca_destroy_aqp1(struct ehca_sport *sport)
423 {
424         int ret;
425
426         ret = ib_destroy_qp(sport->ibqp_aqp1);
427         if (ret) {
428                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
429                 return ret;
430         }
431
432         ret = ib_destroy_cq(sport->ibcq_aqp1);
433         if (ret)
434                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
435
436         return ret;
437 }
438
439 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
440 {
441         return snprintf(buf, PAGE_SIZE, "%d\n",
442                         ehca_debug_level);
443 }
444
445 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
446                                       const char *buf, size_t count)
447 {
448         int value = (*buf) - '0';
449         if (value >= 0 && value <= 9)
450                 ehca_debug_level = value;
451         return 1;
452 }
453
454 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
455             ehca_show_debug_level, ehca_store_debug_level);
456
457 static struct attribute *ehca_drv_attrs[] = {
458         &driver_attr_debug_level.attr,
459         NULL
460 };
461
462 static struct attribute_group ehca_drv_attr_grp = {
463         .attrs = ehca_drv_attrs
464 };
465
466 #define EHCA_RESOURCE_ATTR(name)                                           \
467 static ssize_t  ehca_show_##name(struct device *dev,                       \
468                                  struct device_attribute *attr,            \
469                                  char *buf)                                \
470 {                                                                          \
471         struct ehca_shca *shca;                                            \
472         struct hipz_query_hca *rblock;                                     \
473         int data;                                                          \
474                                                                            \
475         shca = dev->driver_data;                                           \
476                                                                            \
477         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
478         if (!rblock) {                                                     \
479                 dev_err(dev, "Can't allocate rblock memory.");             \
480                 return 0;                                                  \
481         }                                                                  \
482                                                                            \
483         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
484                 dev_err(dev, "Can't query device properties");             \
485                 ehca_free_fw_ctrlblock(rblock);                            \
486                 return 0;                                                  \
487         }                                                                  \
488                                                                            \
489         data = rblock->name;                                               \
490         ehca_free_fw_ctrlblock(rblock);                                    \
491                                                                            \
492         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
493                 return snprintf(buf, 256, "1\n");                          \
494         else                                                               \
495                 return snprintf(buf, 256, "%d\n", data);                   \
496                                                                            \
497 }                                                                          \
498 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
499
500 EHCA_RESOURCE_ATTR(num_ports);
501 EHCA_RESOURCE_ATTR(hw_ver);
502 EHCA_RESOURCE_ATTR(max_eq);
503 EHCA_RESOURCE_ATTR(cur_eq);
504 EHCA_RESOURCE_ATTR(max_cq);
505 EHCA_RESOURCE_ATTR(cur_cq);
506 EHCA_RESOURCE_ATTR(max_qp);
507 EHCA_RESOURCE_ATTR(cur_qp);
508 EHCA_RESOURCE_ATTR(max_mr);
509 EHCA_RESOURCE_ATTR(cur_mr);
510 EHCA_RESOURCE_ATTR(max_mw);
511 EHCA_RESOURCE_ATTR(cur_mw);
512 EHCA_RESOURCE_ATTR(max_pd);
513 EHCA_RESOURCE_ATTR(max_ah);
514
515 static ssize_t ehca_show_adapter_handle(struct device *dev,
516                                         struct device_attribute *attr,
517                                         char *buf)
518 {
519         struct ehca_shca *shca = dev->driver_data;
520
521         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
522
523 }
524 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
525
526 static struct attribute *ehca_dev_attrs[] = {
527         &dev_attr_adapter_handle.attr,
528         &dev_attr_num_ports.attr,
529         &dev_attr_hw_ver.attr,
530         &dev_attr_max_eq.attr,
531         &dev_attr_cur_eq.attr,
532         &dev_attr_max_cq.attr,
533         &dev_attr_cur_cq.attr,
534         &dev_attr_max_qp.attr,
535         &dev_attr_cur_qp.attr,
536         &dev_attr_max_mr.attr,
537         &dev_attr_cur_mr.attr,
538         &dev_attr_max_mw.attr,
539         &dev_attr_cur_mw.attr,
540         &dev_attr_max_pd.attr,
541         &dev_attr_max_ah.attr,
542         NULL
543 };
544
545 static struct attribute_group ehca_dev_attr_grp = {
546         .attrs = ehca_dev_attrs
547 };
548
549 static int __devinit ehca_probe(struct ibmebus_dev *dev,
550                                 const struct of_device_id *id)
551 {
552         struct ehca_shca *shca;
553         const u64 *handle;
554         struct ib_pd *ibpd;
555         int ret;
556
557         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
558         if (!handle) {
559                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
560                              dev->ofdev.node->full_name);
561                 return -ENODEV;
562         }
563
564         if (!(*handle)) {
565                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
566                              dev->ofdev.node->full_name);
567                 return -ENODEV;
568         }
569
570         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
571         if (!shca) {
572                 ehca_gen_err("Cannot allocate shca memory.");
573                 return -ENOMEM;
574         }
575         mutex_init(&shca->modify_mutex);
576
577         shca->ibmebus_dev = dev;
578         shca->ipz_hca_handle.handle = *handle;
579         dev->ofdev.dev.driver_data = shca;
580
581         ret = ehca_sense_attributes(shca);
582         if (ret < 0) {
583                 ehca_gen_err("Cannot sense eHCA attributes.");
584                 goto probe1;
585         }
586
587         ret = ehca_init_device(shca);
588         if (ret) {
589                 ehca_gen_err("Cannot init ehca  device struct");
590                 goto probe1;
591         }
592
593         /* create event queues */
594         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
595         if (ret) {
596                 ehca_err(&shca->ib_device, "Cannot create EQ.");
597                 goto probe1;
598         }
599
600         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
601         if (ret) {
602                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
603                 goto probe3;
604         }
605
606         /* create internal protection domain */
607         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
608         if (IS_ERR(ibpd)) {
609                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
610                 ret = PTR_ERR(ibpd);
611                 goto probe4;
612         }
613
614         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
615         shca->pd->ib_pd.device = &shca->ib_device;
616
617         /* create internal max MR */
618         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
619
620         if (ret) {
621                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
622                          ret);
623                 goto probe5;
624         }
625
626         ret = ib_register_device(&shca->ib_device);
627         if (ret) {
628                 ehca_err(&shca->ib_device,
629                          "ib_register_device() failed ret=%x", ret);
630                 goto probe6;
631         }
632
633         /* create AQP1 for port 1 */
634         if (ehca_open_aqp1 == 1) {
635                 shca->sport[0].port_state = IB_PORT_DOWN;
636                 ret = ehca_create_aqp1(shca, 1);
637                 if (ret) {
638                         ehca_err(&shca->ib_device,
639                                  "Cannot create AQP1 for port 1.");
640                         goto probe7;
641                 }
642         }
643
644         /* create AQP1 for port 2 */
645         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
646                 shca->sport[1].port_state = IB_PORT_DOWN;
647                 ret = ehca_create_aqp1(shca, 2);
648                 if (ret) {
649                         ehca_err(&shca->ib_device,
650                                  "Cannot create AQP1 for port 2.");
651                         goto probe8;
652                 }
653         }
654
655         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
656         if (ret) /* only complain; we can live without attributes */
657                 ehca_err(&shca->ib_device,
658                          "Cannot create device attributes  ret=%d", ret);
659
660         spin_lock(&shca_list_lock);
661         list_add(&shca->shca_list, &shca_list);
662         spin_unlock(&shca_list_lock);
663
664         return 0;
665
666 probe8:
667         ret = ehca_destroy_aqp1(&shca->sport[0]);
668         if (ret)
669                 ehca_err(&shca->ib_device,
670                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
671
672 probe7:
673         ib_unregister_device(&shca->ib_device);
674
675 probe6:
676         ret = ehca_dereg_internal_maxmr(shca);
677         if (ret)
678                 ehca_err(&shca->ib_device,
679                          "Cannot destroy internal MR. ret=%x", ret);
680
681 probe5:
682         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
683         if (ret)
684                 ehca_err(&shca->ib_device,
685                          "Cannot destroy internal PD. ret=%x", ret);
686
687 probe4:
688         ret = ehca_destroy_eq(shca, &shca->neq);
689         if (ret)
690                 ehca_err(&shca->ib_device,
691                          "Cannot destroy NEQ. ret=%x", ret);
692
693 probe3:
694         ret = ehca_destroy_eq(shca, &shca->eq);
695         if (ret)
696                 ehca_err(&shca->ib_device,
697                          "Cannot destroy EQ. ret=%x", ret);
698
699 probe1:
700         ib_dealloc_device(&shca->ib_device);
701
702         return -EINVAL;
703 }
704
705 static int __devexit ehca_remove(struct ibmebus_dev *dev)
706 {
707         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
708         int ret;
709
710         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
711
712         if (ehca_open_aqp1 == 1) {
713                 int i;
714                 for (i = 0; i < shca->num_ports; i++) {
715                         ret = ehca_destroy_aqp1(&shca->sport[i]);
716                         if (ret)
717                                 ehca_err(&shca->ib_device,
718                                          "Cannot destroy AQP1 for port %x "
719                                          "ret=%x", ret, i);
720                 }
721         }
722
723         ib_unregister_device(&shca->ib_device);
724
725         ret = ehca_dereg_internal_maxmr(shca);
726         if (ret)
727                 ehca_err(&shca->ib_device,
728                          "Cannot destroy internal MR. ret=%x", ret);
729
730         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
731         if (ret)
732                 ehca_err(&shca->ib_device,
733                          "Cannot destroy internal PD. ret=%x", ret);
734
735         ret = ehca_destroy_eq(shca, &shca->eq);
736         if (ret)
737                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
738
739         ret = ehca_destroy_eq(shca, &shca->neq);
740         if (ret)
741                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
742
743         ib_dealloc_device(&shca->ib_device);
744
745         spin_lock(&shca_list_lock);
746         list_del(&shca->shca_list);
747         spin_unlock(&shca_list_lock);
748
749         return ret;
750 }
751
752 static struct of_device_id ehca_device_table[] =
753 {
754         {
755                 .name       = "lhca",
756                 .compatible = "IBM,lhca",
757         },
758         {},
759 };
760
761 static struct ibmebus_driver ehca_driver = {
762         .name     = "ehca",
763         .id_table = ehca_device_table,
764         .probe    = ehca_probe,
765         .remove   = ehca_remove,
766 };
767
768 void ehca_poll_eqs(unsigned long data)
769 {
770         struct ehca_shca *shca;
771
772         spin_lock(&shca_list_lock);
773         list_for_each_entry(shca, &shca_list, shca_list) {
774                 if (shca->eq.is_initialized) {
775                         /* call deadman proc only if eq ptr does not change */
776                         struct ehca_eq *eq = &shca->eq;
777                         int max = 3;
778                         volatile u64 q_ofs, q_ofs2;
779                         u64 flags;
780                         spin_lock_irqsave(&eq->spinlock, flags);
781                         q_ofs = eq->ipz_queue.current_q_offset;
782                         spin_unlock_irqrestore(&eq->spinlock, flags);
783                         do {
784                                 spin_lock_irqsave(&eq->spinlock, flags);
785                                 q_ofs2 = eq->ipz_queue.current_q_offset;
786                                 spin_unlock_irqrestore(&eq->spinlock, flags);
787                                 max--;
788                         } while (q_ofs == q_ofs2 && max > 0);
789                         if (q_ofs == q_ofs2)
790                                 ehca_process_eq(shca, 0);
791                 }
792         }
793         mod_timer(&poll_eqs_timer, jiffies + HZ);
794         spin_unlock(&shca_list_lock);
795 }
796
797 int __init ehca_module_init(void)
798 {
799         int ret;
800
801         printk(KERN_INFO "eHCA Infiniband Device Driver "
802                "(Rel.: SVNEHCA_0023)\n");
803         idr_init(&ehca_qp_idr);
804         idr_init(&ehca_cq_idr);
805         spin_lock_init(&ehca_qp_idr_lock);
806         spin_lock_init(&ehca_cq_idr_lock);
807         spin_lock_init(&hcall_lock);
808
809         INIT_LIST_HEAD(&shca_list);
810         spin_lock_init(&shca_list_lock);
811
812         if ((ret = ehca_create_comp_pool())) {
813                 ehca_gen_err("Cannot create comp pool.");
814                 return ret;
815         }
816
817         if ((ret = ehca_create_slab_caches())) {
818                 ehca_gen_err("Cannot create SLAB caches");
819                 ret = -ENOMEM;
820                 goto module_init1;
821         }
822
823         if ((ret = ibmebus_register_driver(&ehca_driver))) {
824                 ehca_gen_err("Cannot register eHCA device driver");
825                 ret = -EINVAL;
826                 goto module_init2;
827         }
828
829         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
830         if (ret) /* only complain; we can live without attributes */
831                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
832
833         if (ehca_poll_all_eqs != 1) {
834                 ehca_gen_err("WARNING!!!");
835                 ehca_gen_err("It is possible to lose interrupts.");
836         } else {
837                 init_timer(&poll_eqs_timer);
838                 poll_eqs_timer.function = ehca_poll_eqs;
839                 poll_eqs_timer.expires = jiffies + HZ;
840                 add_timer(&poll_eqs_timer);
841         }
842
843         return 0;
844
845 module_init2:
846         ehca_destroy_slab_caches();
847
848 module_init1:
849         ehca_destroy_comp_pool();
850         return ret;
851 };
852
853 void __exit ehca_module_exit(void)
854 {
855         if (ehca_poll_all_eqs == 1)
856                 del_timer_sync(&poll_eqs_timer);
857
858         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
859         ibmebus_unregister_driver(&ehca_driver);
860
861         ehca_destroy_slab_caches();
862
863         ehca_destroy_comp_pool();
864
865         idr_destroy(&ehca_cq_idr);
866         idr_destroy(&ehca_qp_idr);
867 };
868
869 module_init(ehca_module_init);
870 module_exit(ehca_module_exit);