4700085ba834a70f2000f316305831b267db18b0
[sfrench/cifs-2.6.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 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_0022");
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  = 1;
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, 1: enabled/default)");
98
99 spinlock_t ehca_qp_idr_lock;
100 spinlock_t ehca_cq_idr_lock;
101 DEFINE_IDR(ehca_qp_idr);
102 DEFINE_IDR(ehca_cq_idr);
103
104
105 static struct list_head shca_list; /* list of all registered ehcas */
106 static spinlock_t shca_list_lock;
107
108 static struct timer_list poll_eqs_timer;
109
110 #ifdef CONFIG_PPC_64K_PAGES
111 static struct kmem_cache *ctblk_cache = NULL;
112
113 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
114 {
115         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
116         if (!ret)
117                 ehca_gen_err("Out of memory for ctblk");
118         return ret;
119 }
120
121 void ehca_free_fw_ctrlblock(void *ptr)
122 {
123         if (ptr)
124                 kmem_cache_free(ctblk_cache, ptr);
125
126 }
127 #endif
128
129 static int ehca_create_slab_caches(void)
130 {
131         int ret;
132
133         ret = ehca_init_pd_cache();
134         if (ret) {
135                 ehca_gen_err("Cannot create PD SLAB cache.");
136                 return ret;
137         }
138
139         ret = ehca_init_cq_cache();
140         if (ret) {
141                 ehca_gen_err("Cannot create CQ SLAB cache.");
142                 goto create_slab_caches2;
143         }
144
145         ret = ehca_init_qp_cache();
146         if (ret) {
147                 ehca_gen_err("Cannot create QP SLAB cache.");
148                 goto create_slab_caches3;
149         }
150
151         ret = ehca_init_av_cache();
152         if (ret) {
153                 ehca_gen_err("Cannot create AV SLAB cache.");
154                 goto create_slab_caches4;
155         }
156
157         ret = ehca_init_mrmw_cache();
158         if (ret) {
159                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
160                 goto create_slab_caches5;
161         }
162
163 #ifdef CONFIG_PPC_64K_PAGES
164         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
165                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
166                                         SLAB_HWCACHE_ALIGN,
167                                         NULL, NULL);
168         if (!ctblk_cache) {
169                 ehca_gen_err("Cannot create ctblk SLAB cache.");
170                 ehca_cleanup_mrmw_cache();
171                 goto create_slab_caches5;
172         }
173 #endif
174         return 0;
175
176 create_slab_caches5:
177         ehca_cleanup_av_cache();
178
179 create_slab_caches4:
180         ehca_cleanup_qp_cache();
181
182 create_slab_caches3:
183         ehca_cleanup_cq_cache();
184
185 create_slab_caches2:
186         ehca_cleanup_pd_cache();
187
188         return ret;
189 }
190
191 static void ehca_destroy_slab_caches(void)
192 {
193         ehca_cleanup_mrmw_cache();
194         ehca_cleanup_av_cache();
195         ehca_cleanup_qp_cache();
196         ehca_cleanup_cq_cache();
197         ehca_cleanup_pd_cache();
198 #ifdef CONFIG_PPC_64K_PAGES
199         if (ctblk_cache)
200                 kmem_cache_destroy(ctblk_cache);
201 #endif
202 }
203
204 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
205 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
206
207 int ehca_sense_attributes(struct ehca_shca *shca)
208 {
209         int ret = 0;
210         u64 h_ret;
211         struct hipz_query_hca *rblock;
212
213         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
214         if (!rblock) {
215                 ehca_gen_err("Cannot allocate rblock memory.");
216                 return -ENOMEM;
217         }
218
219         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
220         if (h_ret != H_SUCCESS) {
221                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
222                              h_ret);
223                 ret = -EPERM;
224                 goto num_ports1;
225         }
226
227         if (ehca_nr_ports == 1)
228                 shca->num_ports = 1;
229         else
230                 shca->num_ports = (u8)rblock->num_ports;
231
232         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
233
234         if (ehca_hw_level == 0) {
235                 u32 hcaaver;
236                 u32 revid;
237
238                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
239                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
240
241                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
242
243                 if ((hcaaver == 1) && (revid == 0))
244                         shca->hw_level = 0;
245                 else if ((hcaaver == 1) && (revid == 1))
246                         shca->hw_level = 1;
247                 else if ((hcaaver == 1) && (revid == 2))
248                         shca->hw_level = 2;
249         }
250         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
251
252         shca->sport[0].rate = IB_RATE_30_GBPS;
253         shca->sport[1].rate = IB_RATE_30_GBPS;
254
255 num_ports1:
256         ehca_free_fw_ctrlblock(rblock);
257         return ret;
258 }
259
260 static int init_node_guid(struct ehca_shca *shca)
261 {
262         int ret = 0;
263         struct hipz_query_hca *rblock;
264
265         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
266         if (!rblock) {
267                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
268                 return -ENOMEM;
269         }
270
271         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
272                 ehca_err(&shca->ib_device, "Can't query device properties");
273                 ret = -EINVAL;
274                 goto init_node_guid1;
275         }
276
277         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
278
279 init_node_guid1:
280         ehca_free_fw_ctrlblock(rblock);
281         return ret;
282 }
283
284 int ehca_init_device(struct ehca_shca *shca)
285 {
286         int ret;
287
288         ret = init_node_guid(shca);
289         if (ret)
290                 return ret;
291
292         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
293         shca->ib_device.owner               = THIS_MODULE;
294
295         shca->ib_device.uverbs_abi_ver      = 6;
296         shca->ib_device.uverbs_cmd_mask     =
297                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
298                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
299                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
300                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
301                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
302                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
303                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
304                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
305                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
306                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
307                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
308                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
309                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
310                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
311                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
312                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
313
314         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
315         shca->ib_device.phys_port_cnt       = shca->num_ports;
316         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
317         shca->ib_device.query_device        = ehca_query_device;
318         shca->ib_device.query_port          = ehca_query_port;
319         shca->ib_device.query_gid           = ehca_query_gid;
320         shca->ib_device.query_pkey          = ehca_query_pkey;
321         /* shca->in_device.modify_device    = ehca_modify_device    */
322         shca->ib_device.modify_port         = ehca_modify_port;
323         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
324         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
325         shca->ib_device.alloc_pd            = ehca_alloc_pd;
326         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
327         shca->ib_device.create_ah           = ehca_create_ah;
328         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
329         shca->ib_device.query_ah            = ehca_query_ah;
330         shca->ib_device.destroy_ah          = ehca_destroy_ah;
331         shca->ib_device.create_qp           = ehca_create_qp;
332         shca->ib_device.modify_qp           = ehca_modify_qp;
333         shca->ib_device.query_qp            = ehca_query_qp;
334         shca->ib_device.destroy_qp          = ehca_destroy_qp;
335         shca->ib_device.post_send           = ehca_post_send;
336         shca->ib_device.post_recv           = ehca_post_recv;
337         shca->ib_device.create_cq           = ehca_create_cq;
338         shca->ib_device.destroy_cq          = ehca_destroy_cq;
339         shca->ib_device.resize_cq           = ehca_resize_cq;
340         shca->ib_device.poll_cq             = ehca_poll_cq;
341         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
342         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
343         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
344         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
345         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
346         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
347         shca->ib_device.query_mr            = ehca_query_mr;
348         shca->ib_device.dereg_mr            = ehca_dereg_mr;
349         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
350         shca->ib_device.alloc_mw            = ehca_alloc_mw;
351         shca->ib_device.bind_mw             = ehca_bind_mw;
352         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
353         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
354         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
355         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
356         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
357         shca->ib_device.attach_mcast        = ehca_attach_mcast;
358         shca->ib_device.detach_mcast        = ehca_detach_mcast;
359         /* shca->ib_device.process_mad      = ehca_process_mad;     */
360         shca->ib_device.mmap                = ehca_mmap;
361
362         return ret;
363 }
364
365 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
366 {
367         struct ehca_sport *sport = &shca->sport[port - 1];
368         struct ib_cq *ibcq;
369         struct ib_qp *ibqp;
370         struct ib_qp_init_attr qp_init_attr;
371         int ret;
372
373         if (sport->ibcq_aqp1) {
374                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
375                 return -EPERM;
376         }
377
378         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10);
379         if (IS_ERR(ibcq)) {
380                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
381                 return PTR_ERR(ibcq);
382         }
383         sport->ibcq_aqp1 = ibcq;
384
385         if (sport->ibqp_aqp1) {
386                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
387                 ret = -EPERM;
388                 goto create_aqp1;
389         }
390
391         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
392         qp_init_attr.send_cq          = ibcq;
393         qp_init_attr.recv_cq          = ibcq;
394         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
395         qp_init_attr.cap.max_send_wr  = 100;
396         qp_init_attr.cap.max_recv_wr  = 100;
397         qp_init_attr.cap.max_send_sge = 2;
398         qp_init_attr.cap.max_recv_sge = 1;
399         qp_init_attr.qp_type          = IB_QPT_GSI;
400         qp_init_attr.port_num         = port;
401         qp_init_attr.qp_context       = NULL;
402         qp_init_attr.event_handler    = NULL;
403         qp_init_attr.srq              = NULL;
404
405         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
406         if (IS_ERR(ibqp)) {
407                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
408                 ret = PTR_ERR(ibqp);
409                 goto create_aqp1;
410         }
411         sport->ibqp_aqp1 = ibqp;
412
413         return 0;
414
415 create_aqp1:
416         ib_destroy_cq(sport->ibcq_aqp1);
417         return ret;
418 }
419
420 static int ehca_destroy_aqp1(struct ehca_sport *sport)
421 {
422         int ret;
423
424         ret = ib_destroy_qp(sport->ibqp_aqp1);
425         if (ret) {
426                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
427                 return ret;
428         }
429
430         ret = ib_destroy_cq(sport->ibcq_aqp1);
431         if (ret)
432                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
433
434         return ret;
435 }
436
437 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
438 {
439         return snprintf(buf, PAGE_SIZE, "%d\n",
440                         ehca_debug_level);
441 }
442
443 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
444                                       const char *buf, size_t count)
445 {
446         int value = (*buf) - '0';
447         if (value >= 0 && value <= 9)
448                 ehca_debug_level = value;
449         return 1;
450 }
451
452 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
453             ehca_show_debug_level, ehca_store_debug_level);
454
455 void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
456 {
457         driver_create_file(&drv->driver, &driver_attr_debug_level);
458 }
459
460 void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
461 {
462         driver_remove_file(&drv->driver, &driver_attr_debug_level);
463 }
464
465 #define EHCA_RESOURCE_ATTR(name)                                           \
466 static ssize_t  ehca_show_##name(struct device *dev,                       \
467                                  struct device_attribute *attr,            \
468                                  char *buf)                                \
469 {                                                                          \
470         struct ehca_shca *shca;                                            \
471         struct hipz_query_hca *rblock;                                     \
472         int data;                                                          \
473                                                                            \
474         shca = dev->driver_data;                                           \
475                                                                            \
476         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
477         if (!rblock) {                                                     \
478                 dev_err(dev, "Can't allocate rblock memory.");             \
479                 return 0;                                                  \
480         }                                                                  \
481                                                                            \
482         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
483                 dev_err(dev, "Can't query device properties");             \
484                 ehca_free_fw_ctrlblock(rblock);                            \
485                 return 0;                                                  \
486         }                                                                  \
487                                                                            \
488         data = rblock->name;                                               \
489         ehca_free_fw_ctrlblock(rblock);                                    \
490                                                                            \
491         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
492                 return snprintf(buf, 256, "1\n");                          \
493         else                                                               \
494                 return snprintf(buf, 256, "%d\n", data);                   \
495                                                                            \
496 }                                                                          \
497 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
498
499 EHCA_RESOURCE_ATTR(num_ports);
500 EHCA_RESOURCE_ATTR(hw_ver);
501 EHCA_RESOURCE_ATTR(max_eq);
502 EHCA_RESOURCE_ATTR(cur_eq);
503 EHCA_RESOURCE_ATTR(max_cq);
504 EHCA_RESOURCE_ATTR(cur_cq);
505 EHCA_RESOURCE_ATTR(max_qp);
506 EHCA_RESOURCE_ATTR(cur_qp);
507 EHCA_RESOURCE_ATTR(max_mr);
508 EHCA_RESOURCE_ATTR(cur_mr);
509 EHCA_RESOURCE_ATTR(max_mw);
510 EHCA_RESOURCE_ATTR(cur_mw);
511 EHCA_RESOURCE_ATTR(max_pd);
512 EHCA_RESOURCE_ATTR(max_ah);
513
514 static ssize_t ehca_show_adapter_handle(struct device *dev,
515                                         struct device_attribute *attr,
516                                         char *buf)
517 {
518         struct ehca_shca *shca = dev->driver_data;
519
520         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
521
522 }
523 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
524
525
526 void ehca_create_device_sysfs(struct ibmebus_dev *dev)
527 {
528         device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
529         device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
530         device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
531         device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
532         device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
533         device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
534         device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
535         device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
536         device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
537         device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
538         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
539         device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
540         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
541         device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
542         device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
543 }
544
545 void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
546 {
547         device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
548         device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
549         device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
550         device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
551         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
552         device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
553         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
554         device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
555         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
556         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
557         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
558         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
559         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
560         device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
561         device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
562 }
563
564 static int __devinit ehca_probe(struct ibmebus_dev *dev,
565                                 const struct of_device_id *id)
566 {
567         struct ehca_shca *shca;
568         const u64 *handle;
569         struct ib_pd *ibpd;
570         int ret;
571
572         handle = get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
573         if (!handle) {
574                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
575                              dev->ofdev.node->full_name);
576                 return -ENODEV;
577         }
578
579         if (!(*handle)) {
580                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
581                              dev->ofdev.node->full_name);
582                 return -ENODEV;
583         }
584
585         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
586         if (!shca) {
587                 ehca_gen_err("Cannot allocate shca memory.");
588                 return -ENOMEM;
589         }
590         mutex_init(&shca->modify_mutex);
591
592         shca->ibmebus_dev = dev;
593         shca->ipz_hca_handle.handle = *handle;
594         dev->ofdev.dev.driver_data = shca;
595
596         ret = ehca_sense_attributes(shca);
597         if (ret < 0) {
598                 ehca_gen_err("Cannot sense eHCA attributes.");
599                 goto probe1;
600         }
601
602         ret = ehca_init_device(shca);
603         if (ret) {
604                 ehca_gen_err("Cannot init ehca  device struct");
605                 goto probe1;
606         }
607
608         /* create event queues */
609         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
610         if (ret) {
611                 ehca_err(&shca->ib_device, "Cannot create EQ.");
612                 goto probe1;
613         }
614
615         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
616         if (ret) {
617                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
618                 goto probe3;
619         }
620
621         /* create internal protection domain */
622         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
623         if (IS_ERR(ibpd)) {
624                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
625                 ret = PTR_ERR(ibpd);
626                 goto probe4;
627         }
628
629         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
630         shca->pd->ib_pd.device = &shca->ib_device;
631
632         /* create internal max MR */
633         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
634
635         if (ret) {
636                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
637                          ret);
638                 goto probe5;
639         }
640
641         ret = ib_register_device(&shca->ib_device);
642         if (ret) {
643                 ehca_err(&shca->ib_device,
644                          "ib_register_device() failed ret=%x", ret);
645                 goto probe6;
646         }
647
648         /* create AQP1 for port 1 */
649         if (ehca_open_aqp1 == 1) {
650                 shca->sport[0].port_state = IB_PORT_DOWN;
651                 ret = ehca_create_aqp1(shca, 1);
652                 if (ret) {
653                         ehca_err(&shca->ib_device,
654                                  "Cannot create AQP1 for port 1.");
655                         goto probe7;
656                 }
657         }
658
659         /* create AQP1 for port 2 */
660         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
661                 shca->sport[1].port_state = IB_PORT_DOWN;
662                 ret = ehca_create_aqp1(shca, 2);
663                 if (ret) {
664                         ehca_err(&shca->ib_device,
665                                  "Cannot create AQP1 for port 2.");
666                         goto probe8;
667                 }
668         }
669
670         ehca_create_device_sysfs(dev);
671
672         spin_lock(&shca_list_lock);
673         list_add(&shca->shca_list, &shca_list);
674         spin_unlock(&shca_list_lock);
675
676         return 0;
677
678 probe8:
679         ret = ehca_destroy_aqp1(&shca->sport[0]);
680         if (ret)
681                 ehca_err(&shca->ib_device,
682                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
683
684 probe7:
685         ib_unregister_device(&shca->ib_device);
686
687 probe6:
688         ret = ehca_dereg_internal_maxmr(shca);
689         if (ret)
690                 ehca_err(&shca->ib_device,
691                          "Cannot destroy internal MR. ret=%x", ret);
692
693 probe5:
694         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
695         if (ret)
696                 ehca_err(&shca->ib_device,
697                          "Cannot destroy internal PD. ret=%x", ret);
698
699 probe4:
700         ret = ehca_destroy_eq(shca, &shca->neq);
701         if (ret)
702                 ehca_err(&shca->ib_device,
703                          "Cannot destroy NEQ. ret=%x", ret);
704
705 probe3:
706         ret = ehca_destroy_eq(shca, &shca->eq);
707         if (ret)
708                 ehca_err(&shca->ib_device,
709                          "Cannot destroy EQ. ret=%x", ret);
710
711 probe1:
712         ib_dealloc_device(&shca->ib_device);
713
714         return -EINVAL;
715 }
716
717 static int __devexit ehca_remove(struct ibmebus_dev *dev)
718 {
719         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
720         int ret;
721
722         ehca_remove_device_sysfs(dev);
723
724         if (ehca_open_aqp1 == 1) {
725                 int i;
726                 for (i = 0; i < shca->num_ports; i++) {
727                         ret = ehca_destroy_aqp1(&shca->sport[i]);
728                         if (ret)
729                                 ehca_err(&shca->ib_device,
730                                          "Cannot destroy AQP1 for port %x "
731                                          "ret=%x", ret, i);
732                 }
733         }
734
735         ib_unregister_device(&shca->ib_device);
736
737         ret = ehca_dereg_internal_maxmr(shca);
738         if (ret)
739                 ehca_err(&shca->ib_device,
740                          "Cannot destroy internal MR. ret=%x", ret);
741
742         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
743         if (ret)
744                 ehca_err(&shca->ib_device,
745                          "Cannot destroy internal PD. ret=%x", ret);
746
747         ret = ehca_destroy_eq(shca, &shca->eq);
748         if (ret)
749                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
750
751         ret = ehca_destroy_eq(shca, &shca->neq);
752         if (ret)
753                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
754
755         ib_dealloc_device(&shca->ib_device);
756
757         spin_lock(&shca_list_lock);
758         list_del(&shca->shca_list);
759         spin_unlock(&shca_list_lock);
760
761         return ret;
762 }
763
764 static struct of_device_id ehca_device_table[] =
765 {
766         {
767                 .name       = "lhca",
768                 .compatible = "IBM,lhca",
769         },
770         {},
771 };
772
773 static struct ibmebus_driver ehca_driver = {
774         .name     = "ehca",
775         .id_table = ehca_device_table,
776         .probe    = ehca_probe,
777         .remove   = ehca_remove,
778 };
779
780 void ehca_poll_eqs(unsigned long data)
781 {
782         struct ehca_shca *shca;
783
784         spin_lock(&shca_list_lock);
785         list_for_each_entry(shca, &shca_list, shca_list) {
786                 if (shca->eq.is_initialized) {
787                         /* call deadman proc only if eq ptr does not change */
788                         struct ehca_eq *eq = &shca->eq;
789                         int max = 3;
790                         volatile u64 q_ofs, q_ofs2;
791                         u64 flags;
792                         spin_lock_irqsave(&eq->spinlock, flags);
793                         q_ofs = eq->ipz_queue.current_q_offset;
794                         spin_unlock_irqrestore(&eq->spinlock, flags);
795                         do {
796                                 spin_lock_irqsave(&eq->spinlock, flags);
797                                 q_ofs2 = eq->ipz_queue.current_q_offset;
798                                 spin_unlock_irqrestore(&eq->spinlock, flags);
799                                 max--;
800                         } while (q_ofs == q_ofs2 && max > 0);
801                         if (q_ofs == q_ofs2)
802                                 ehca_process_eq(shca, 0);
803                 }
804         }
805         mod_timer(&poll_eqs_timer, jiffies + HZ);
806         spin_unlock(&shca_list_lock);
807 }
808
809 int __init ehca_module_init(void)
810 {
811         int ret;
812
813         printk(KERN_INFO "eHCA Infiniband Device Driver "
814                "(Rel.: SVNEHCA_0022)\n");
815         idr_init(&ehca_qp_idr);
816         idr_init(&ehca_cq_idr);
817         spin_lock_init(&ehca_qp_idr_lock);
818         spin_lock_init(&ehca_cq_idr_lock);
819
820         INIT_LIST_HEAD(&shca_list);
821         spin_lock_init(&shca_list_lock);
822
823         if ((ret = ehca_create_comp_pool())) {
824                 ehca_gen_err("Cannot create comp pool.");
825                 return ret;
826         }
827
828         if ((ret = ehca_create_slab_caches())) {
829                 ehca_gen_err("Cannot create SLAB caches");
830                 ret = -ENOMEM;
831                 goto module_init1;
832         }
833
834         if ((ret = ibmebus_register_driver(&ehca_driver))) {
835                 ehca_gen_err("Cannot register eHCA device driver");
836                 ret = -EINVAL;
837                 goto module_init2;
838         }
839
840         ehca_create_driver_sysfs(&ehca_driver);
841
842         if (ehca_poll_all_eqs != 1) {
843                 ehca_gen_err("WARNING!!!");
844                 ehca_gen_err("It is possible to lose interrupts.");
845         } else {
846                 init_timer(&poll_eqs_timer);
847                 poll_eqs_timer.function = ehca_poll_eqs;
848                 poll_eqs_timer.expires = jiffies + HZ;
849                 add_timer(&poll_eqs_timer);
850         }
851
852         return 0;
853
854 module_init2:
855         ehca_destroy_slab_caches();
856
857 module_init1:
858         ehca_destroy_comp_pool();
859         return ret;
860 };
861
862 void __exit ehca_module_exit(void)
863 {
864         if (ehca_poll_all_eqs == 1)
865                 del_timer_sync(&poll_eqs_timer);
866
867         ehca_remove_driver_sysfs(&ehca_driver);
868         ibmebus_unregister_driver(&ehca_driver);
869
870         ehca_destroy_slab_caches();
871
872         ehca_destroy_comp_pool();
873
874         idr_destroy(&ehca_cq_idr);
875         idr_destroy(&ehca_qp_idr);
876 };
877
878 module_init(ehca_module_init);
879 module_exit(ehca_module_exit);