2d370543e96d1e1e5a1ba7840b8598efc747df97
[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.num_comp_vectors    = 1;
317         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
318         shca->ib_device.query_device        = ehca_query_device;
319         shca->ib_device.query_port          = ehca_query_port;
320         shca->ib_device.query_gid           = ehca_query_gid;
321         shca->ib_device.query_pkey          = ehca_query_pkey;
322         /* shca->in_device.modify_device    = ehca_modify_device    */
323         shca->ib_device.modify_port         = ehca_modify_port;
324         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
325         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
326         shca->ib_device.alloc_pd            = ehca_alloc_pd;
327         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
328         shca->ib_device.create_ah           = ehca_create_ah;
329         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
330         shca->ib_device.query_ah            = ehca_query_ah;
331         shca->ib_device.destroy_ah          = ehca_destroy_ah;
332         shca->ib_device.create_qp           = ehca_create_qp;
333         shca->ib_device.modify_qp           = ehca_modify_qp;
334         shca->ib_device.query_qp            = ehca_query_qp;
335         shca->ib_device.destroy_qp          = ehca_destroy_qp;
336         shca->ib_device.post_send           = ehca_post_send;
337         shca->ib_device.post_recv           = ehca_post_recv;
338         shca->ib_device.create_cq           = ehca_create_cq;
339         shca->ib_device.destroy_cq          = ehca_destroy_cq;
340         shca->ib_device.resize_cq           = ehca_resize_cq;
341         shca->ib_device.poll_cq             = ehca_poll_cq;
342         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
343         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
344         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
345         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
346         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
347         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
348         shca->ib_device.query_mr            = ehca_query_mr;
349         shca->ib_device.dereg_mr            = ehca_dereg_mr;
350         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
351         shca->ib_device.alloc_mw            = ehca_alloc_mw;
352         shca->ib_device.bind_mw             = ehca_bind_mw;
353         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
354         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
355         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
356         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
357         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
358         shca->ib_device.attach_mcast        = ehca_attach_mcast;
359         shca->ib_device.detach_mcast        = ehca_detach_mcast;
360         /* shca->ib_device.process_mad      = ehca_process_mad;     */
361         shca->ib_device.mmap                = ehca_mmap;
362
363         return ret;
364 }
365
366 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
367 {
368         struct ehca_sport *sport = &shca->sport[port - 1];
369         struct ib_cq *ibcq;
370         struct ib_qp *ibqp;
371         struct ib_qp_init_attr qp_init_attr;
372         int ret;
373
374         if (sport->ibcq_aqp1) {
375                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
376                 return -EPERM;
377         }
378
379         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
380         if (IS_ERR(ibcq)) {
381                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
382                 return PTR_ERR(ibcq);
383         }
384         sport->ibcq_aqp1 = ibcq;
385
386         if (sport->ibqp_aqp1) {
387                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
388                 ret = -EPERM;
389                 goto create_aqp1;
390         }
391
392         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
393         qp_init_attr.send_cq          = ibcq;
394         qp_init_attr.recv_cq          = ibcq;
395         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
396         qp_init_attr.cap.max_send_wr  = 100;
397         qp_init_attr.cap.max_recv_wr  = 100;
398         qp_init_attr.cap.max_send_sge = 2;
399         qp_init_attr.cap.max_recv_sge = 1;
400         qp_init_attr.qp_type          = IB_QPT_GSI;
401         qp_init_attr.port_num         = port;
402         qp_init_attr.qp_context       = NULL;
403         qp_init_attr.event_handler    = NULL;
404         qp_init_attr.srq              = NULL;
405
406         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
407         if (IS_ERR(ibqp)) {
408                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
409                 ret = PTR_ERR(ibqp);
410                 goto create_aqp1;
411         }
412         sport->ibqp_aqp1 = ibqp;
413
414         return 0;
415
416 create_aqp1:
417         ib_destroy_cq(sport->ibcq_aqp1);
418         return ret;
419 }
420
421 static int ehca_destroy_aqp1(struct ehca_sport *sport)
422 {
423         int ret;
424
425         ret = ib_destroy_qp(sport->ibqp_aqp1);
426         if (ret) {
427                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
428                 return ret;
429         }
430
431         ret = ib_destroy_cq(sport->ibcq_aqp1);
432         if (ret)
433                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
434
435         return ret;
436 }
437
438 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
439 {
440         return snprintf(buf, PAGE_SIZE, "%d\n",
441                         ehca_debug_level);
442 }
443
444 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
445                                       const char *buf, size_t count)
446 {
447         int value = (*buf) - '0';
448         if (value >= 0 && value <= 9)
449                 ehca_debug_level = value;
450         return 1;
451 }
452
453 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
454             ehca_show_debug_level, ehca_store_debug_level);
455
456 void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
457 {
458         driver_create_file(&drv->driver, &driver_attr_debug_level);
459 }
460
461 void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
462 {
463         driver_remove_file(&drv->driver, &driver_attr_debug_level);
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
527 void ehca_create_device_sysfs(struct ibmebus_dev *dev)
528 {
529         device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
530         device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
531         device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
532         device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
533         device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
534         device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
535         device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
536         device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
537         device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
538         device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
539         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
540         device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
541         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
542         device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
543         device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
544 }
545
546 void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
547 {
548         device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
549         device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
550         device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
551         device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
552         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
553         device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
554         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
555         device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
556         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
557         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
558         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
559         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
560         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
561         device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
562         device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
563 }
564
565 static int __devinit ehca_probe(struct ibmebus_dev *dev,
566                                 const struct of_device_id *id)
567 {
568         struct ehca_shca *shca;
569         const u64 *handle;
570         struct ib_pd *ibpd;
571         int ret;
572
573         handle = get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
574         if (!handle) {
575                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
576                              dev->ofdev.node->full_name);
577                 return -ENODEV;
578         }
579
580         if (!(*handle)) {
581                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
582                              dev->ofdev.node->full_name);
583                 return -ENODEV;
584         }
585
586         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
587         if (!shca) {
588                 ehca_gen_err("Cannot allocate shca memory.");
589                 return -ENOMEM;
590         }
591         mutex_init(&shca->modify_mutex);
592
593         shca->ibmebus_dev = dev;
594         shca->ipz_hca_handle.handle = *handle;
595         dev->ofdev.dev.driver_data = shca;
596
597         ret = ehca_sense_attributes(shca);
598         if (ret < 0) {
599                 ehca_gen_err("Cannot sense eHCA attributes.");
600                 goto probe1;
601         }
602
603         ret = ehca_init_device(shca);
604         if (ret) {
605                 ehca_gen_err("Cannot init ehca  device struct");
606                 goto probe1;
607         }
608
609         /* create event queues */
610         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
611         if (ret) {
612                 ehca_err(&shca->ib_device, "Cannot create EQ.");
613                 goto probe1;
614         }
615
616         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
617         if (ret) {
618                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
619                 goto probe3;
620         }
621
622         /* create internal protection domain */
623         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
624         if (IS_ERR(ibpd)) {
625                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
626                 ret = PTR_ERR(ibpd);
627                 goto probe4;
628         }
629
630         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
631         shca->pd->ib_pd.device = &shca->ib_device;
632
633         /* create internal max MR */
634         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
635
636         if (ret) {
637                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
638                          ret);
639                 goto probe5;
640         }
641
642         ret = ib_register_device(&shca->ib_device);
643         if (ret) {
644                 ehca_err(&shca->ib_device,
645                          "ib_register_device() failed ret=%x", ret);
646                 goto probe6;
647         }
648
649         /* create AQP1 for port 1 */
650         if (ehca_open_aqp1 == 1) {
651                 shca->sport[0].port_state = IB_PORT_DOWN;
652                 ret = ehca_create_aqp1(shca, 1);
653                 if (ret) {
654                         ehca_err(&shca->ib_device,
655                                  "Cannot create AQP1 for port 1.");
656                         goto probe7;
657                 }
658         }
659
660         /* create AQP1 for port 2 */
661         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
662                 shca->sport[1].port_state = IB_PORT_DOWN;
663                 ret = ehca_create_aqp1(shca, 2);
664                 if (ret) {
665                         ehca_err(&shca->ib_device,
666                                  "Cannot create AQP1 for port 2.");
667                         goto probe8;
668                 }
669         }
670
671         ehca_create_device_sysfs(dev);
672
673         spin_lock(&shca_list_lock);
674         list_add(&shca->shca_list, &shca_list);
675         spin_unlock(&shca_list_lock);
676
677         return 0;
678
679 probe8:
680         ret = ehca_destroy_aqp1(&shca->sport[0]);
681         if (ret)
682                 ehca_err(&shca->ib_device,
683                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
684
685 probe7:
686         ib_unregister_device(&shca->ib_device);
687
688 probe6:
689         ret = ehca_dereg_internal_maxmr(shca);
690         if (ret)
691                 ehca_err(&shca->ib_device,
692                          "Cannot destroy internal MR. ret=%x", ret);
693
694 probe5:
695         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
696         if (ret)
697                 ehca_err(&shca->ib_device,
698                          "Cannot destroy internal PD. ret=%x", ret);
699
700 probe4:
701         ret = ehca_destroy_eq(shca, &shca->neq);
702         if (ret)
703                 ehca_err(&shca->ib_device,
704                          "Cannot destroy NEQ. ret=%x", ret);
705
706 probe3:
707         ret = ehca_destroy_eq(shca, &shca->eq);
708         if (ret)
709                 ehca_err(&shca->ib_device,
710                          "Cannot destroy EQ. ret=%x", ret);
711
712 probe1:
713         ib_dealloc_device(&shca->ib_device);
714
715         return -EINVAL;
716 }
717
718 static int __devexit ehca_remove(struct ibmebus_dev *dev)
719 {
720         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
721         int ret;
722
723         ehca_remove_device_sysfs(dev);
724
725         if (ehca_open_aqp1 == 1) {
726                 int i;
727                 for (i = 0; i < shca->num_ports; i++) {
728                         ret = ehca_destroy_aqp1(&shca->sport[i]);
729                         if (ret)
730                                 ehca_err(&shca->ib_device,
731                                          "Cannot destroy AQP1 for port %x "
732                                          "ret=%x", ret, i);
733                 }
734         }
735
736         ib_unregister_device(&shca->ib_device);
737
738         ret = ehca_dereg_internal_maxmr(shca);
739         if (ret)
740                 ehca_err(&shca->ib_device,
741                          "Cannot destroy internal MR. ret=%x", ret);
742
743         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
744         if (ret)
745                 ehca_err(&shca->ib_device,
746                          "Cannot destroy internal PD. ret=%x", ret);
747
748         ret = ehca_destroy_eq(shca, &shca->eq);
749         if (ret)
750                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
751
752         ret = ehca_destroy_eq(shca, &shca->neq);
753         if (ret)
754                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
755
756         ib_dealloc_device(&shca->ib_device);
757
758         spin_lock(&shca_list_lock);
759         list_del(&shca->shca_list);
760         spin_unlock(&shca_list_lock);
761
762         return ret;
763 }
764
765 static struct of_device_id ehca_device_table[] =
766 {
767         {
768                 .name       = "lhca",
769                 .compatible = "IBM,lhca",
770         },
771         {},
772 };
773
774 static struct ibmebus_driver ehca_driver = {
775         .name     = "ehca",
776         .id_table = ehca_device_table,
777         .probe    = ehca_probe,
778         .remove   = ehca_remove,
779 };
780
781 void ehca_poll_eqs(unsigned long data)
782 {
783         struct ehca_shca *shca;
784
785         spin_lock(&shca_list_lock);
786         list_for_each_entry(shca, &shca_list, shca_list) {
787                 if (shca->eq.is_initialized) {
788                         /* call deadman proc only if eq ptr does not change */
789                         struct ehca_eq *eq = &shca->eq;
790                         int max = 3;
791                         volatile u64 q_ofs, q_ofs2;
792                         u64 flags;
793                         spin_lock_irqsave(&eq->spinlock, flags);
794                         q_ofs = eq->ipz_queue.current_q_offset;
795                         spin_unlock_irqrestore(&eq->spinlock, flags);
796                         do {
797                                 spin_lock_irqsave(&eq->spinlock, flags);
798                                 q_ofs2 = eq->ipz_queue.current_q_offset;
799                                 spin_unlock_irqrestore(&eq->spinlock, flags);
800                                 max--;
801                         } while (q_ofs == q_ofs2 && max > 0);
802                         if (q_ofs == q_ofs2)
803                                 ehca_process_eq(shca, 0);
804                 }
805         }
806         mod_timer(&poll_eqs_timer, jiffies + HZ);
807         spin_unlock(&shca_list_lock);
808 }
809
810 int __init ehca_module_init(void)
811 {
812         int ret;
813
814         printk(KERN_INFO "eHCA Infiniband Device Driver "
815                "(Rel.: SVNEHCA_0022)\n");
816         idr_init(&ehca_qp_idr);
817         idr_init(&ehca_cq_idr);
818         spin_lock_init(&ehca_qp_idr_lock);
819         spin_lock_init(&ehca_cq_idr_lock);
820
821         INIT_LIST_HEAD(&shca_list);
822         spin_lock_init(&shca_list_lock);
823
824         if ((ret = ehca_create_comp_pool())) {
825                 ehca_gen_err("Cannot create comp pool.");
826                 return ret;
827         }
828
829         if ((ret = ehca_create_slab_caches())) {
830                 ehca_gen_err("Cannot create SLAB caches");
831                 ret = -ENOMEM;
832                 goto module_init1;
833         }
834
835         if ((ret = ibmebus_register_driver(&ehca_driver))) {
836                 ehca_gen_err("Cannot register eHCA device driver");
837                 ret = -EINVAL;
838                 goto module_init2;
839         }
840
841         ehca_create_driver_sysfs(&ehca_driver);
842
843         if (ehca_poll_all_eqs != 1) {
844                 ehca_gen_err("WARNING!!!");
845                 ehca_gen_err("It is possible to lose interrupts.");
846         } else {
847                 init_timer(&poll_eqs_timer);
848                 poll_eqs_timer.function = ehca_poll_eqs;
849                 poll_eqs_timer.expires = jiffies + HZ;
850                 add_timer(&poll_eqs_timer);
851         }
852
853         return 0;
854
855 module_init2:
856         ehca_destroy_slab_caches();
857
858 module_init1:
859         ehca_destroy_comp_pool();
860         return ret;
861 };
862
863 void __exit ehca_module_exit(void)
864 {
865         if (ehca_poll_all_eqs == 1)
866                 del_timer_sync(&poll_eqs_timer);
867
868         ehca_remove_driver_sysfs(&ehca_driver);
869         ibmebus_unregister_driver(&ehca_driver);
870
871         ehca_destroy_slab_caches();
872
873         ehca_destroy_comp_pool();
874
875         idr_destroy(&ehca_cq_idr);
876         idr_destroy(&ehca_qp_idr);
877 };
878
879 module_init(ehca_module_init);
880 module_exit(ehca_module_exit);